adjust the sensitivity of the lcd panel quotation

Did you know you can change the touch sensitivity of your phone? All smartphones, including Android and iPhones, come with a default touch sensitivity which is usually good enough for most situations, but if you feel that your phone’s touch screen is too fast or slow, or otherwise not meeting your needs, you can change the touch sensitivity on your phone.

Android has a feature that allows you to control the sensitivity of your screen. This feature can be particularly useful for people with dexterity issues. If you want to be very sure you are touching the right thing, set the screen sensitivity lower and you will have to work harder to activate things. If you need a softer touch, set the sensitivity higher.

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You can change touch sensitivity on Android by going into Language & Input settings. This feature appears in different locations, depending on the model. Some smartphones have a separate setting, but you can also just search for “Language & Input” in your settings.

5. Turn ON Touch Accommodations and do not change anything else here on this page at all. When done, go back to the home screen and try using your iPhone or iPad as you normally would.

The iPhone has two sensitivity modes for Haptic Touch — Fast and Slow. By default, Apple sets the Haptic Touch to the Fast mode, which can be too sensitive if you are getting used to the functionality. Switching to the Slow mode using the steps below can prevent accidental triggers of Haptic Touch.

3. Tap 3D & Haptic Touch. Depending on the device you have, only the 3D Touch or the Haptic Touch option might appear. For 3D Touch, turn on the feature, then use the slider to select a sensitivity level. For Haptic Touch, choose a touch duration speed, then tap the image to test your setting.

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Touch sensitivity is an iPhone feature that was released through the introduction of the 3D Touch in 2015, which allows you to bring up menus, previews, and actions by changing the force of your press on the screen.

3D and Haptic Touch are notable recent features of the iPhone. While the 3D Touch feature was released first in 2015, it was replaced recently by the more user-friendly Haptic Touch for the iPhone 11.

The 3D and Haptic Touch features essentially do the same thing — by changing how you press on certain icons on your phone, you can bring up content previews, possible actions, and contextual menus.

The only difference between the two features is that, with 3D Touch, the icons on your phone respond to how long you press, as well as the force of the press itself. The Haptic Touch, on the other hand, only responds to the length of each press.

If you don"t like your current touch settings — whether you think the sensitivity is too high, and you end up pulling up menus by accident all the time, or that it is too low that your phone is not responding properly to your commands — you can easily change the touch sensitivity on your iPhone on an iPhone 6S or later. Here"s how to do it.

Melanie Weir is a freelance author for Insider, mainly focusing on the Tech Reference section, but occasionally contributing to Lifestyle and Entertainment topics as well. She is also a freelance writer for ScreenRant, and is the Lead Weekend News Editor at TheThings.com. In her spare time she writes plays for both stage and screen. She can be reached at melanie.weir1008@gmail.com, or through LinkedIn.

This article was co-authored by wikiHow staff writer, Nicole Levine, MFA. Nicole Levine is a Technology Writer and Editor for wikiHow. She has more than 20 years of experience creating technical documentation and leading support teams at major web hosting and software companies. Nicole also holds an MFA in Creative Writing from Portland State University and teaches composition, fiction-writing, and zine-making at various institutions.

The Smart-UPS detects line voltage distortions such as spikes, notches, dips, and swells, as well as distortions caused by operation with inexpensive fuel-powered generators. By default, the UPS reacts to distortions by transferring to on-battery operation to protect the equipment that you are plugging into the UPS. Where power quality is poor, the UPS may frequently transfer to on-battery operation. Battery longevity and service life of the UPS may be conserved by reducing the sensitivity of the UPS, as long as your equipment can operate normally under the conditions detailed below. The sensitivity circuit monitors Total Harmonic Distortion(THD), Change in Voltage over Time(dv/dt), and Frequency (Hz) out of tolerance.

The sensitivity circuit looks at these three parameters (THD, dv/dt, Hz) and makes a quantitative analysis based on all three things using a proprietary algorithm. There are not pre-defined limits for each parameter. (IE: There is no way to say "At medium sensitivity, the UPS will transfer at X percent THD.")

Smart-UPS products default to "High" sensitivity. Lowering the sensitivity may allow your UPS to operate online during a wider array of input conditions, however it also increases the transfer time of the UPS. "Transfer Time" is the length of time a Line-Interactive UPS takes to switch from online to on-battery operation. The level of power disturbance can affect transfer time when the unit is set to Medium or Low. Some sensitive loads may not be compatible with the extended transfer times experienced at lower sensitivity settings. If you experience a load drop during online to on battery transfer when the UPS is set to medium or low sensitivity you may need to increase the sensitivity setting to high. Extremely sensitive loads may perform better with an online UPS such as a Smart-UPS RT which has no transfer time.

In the event of any type of voltage disturbance, the UPS will transfer to battery power and watch the AC line until it can transfer back to line. The transfer time in this mode depends on how far the line voltage deviates from the sine wave reference. It is generally 2-4 milliseconds.

In the event of a RMS voltage-out-of-tolerance(High/Low/No) and RMS-rate-of-change disturbances(dv/dt) in the line voltage, the UPS will transfer to battery power and watch the AC line until it can transfer back to line. In this mode the transfer times are longer but still within acceptable limits to insure the continuity of a computer"s operation. They are generally 6-8 milliseconds.

In the event of a RMS voltage-out-of-tolerance disturbances(High/Low/No) in the line voltage, the UPS will transfer to battery power and watch the AC line until it can transfer back to line. In this mode the transfer times are longer but still within acceptable limits to insure the continuity of a computer"s operation. They are generally 8-10 milliseconds.

"SU" Smart UPS 700va or larger and "SUA" Smart-UPS 1000va or larger have a sensitivity button on the rear panel of the UPS. To change the sensitivity of the UPS, press the small, white "sensitivity" button* on the rear of the UPS. Use a pointed object (such as a pen) to do so. The default setting is "high"; press the button once to set the sensitivity to "medium", and press it again to set it to "low"; pressing it a third time will set it back to "high". The sensitivity setting change will take effect immediately. The green LED next to the button is a sensitivity setting indicator - brightly lit is "high" sensitivity, dimly lit is "medium", and off is "low" sensitivity.

Next Generation Smart-UPS (Part Numbers beginning with "SMT" or "SMX") feature a fully interactive LCD display. By default these units feature a "Local Power Quality" setting, which is a combination of Sensitivity and Transfer Voltages. To configure sensitivity separately, you must enable "Advanced Menus". This is enabled via the "Configuration" menu on the LCD screen. Once "Advanced Menus" are enabled, you will see several new options under the "Configuration" menu, including "Sensitivity". From there, you can select "Normal" (High), "Reduced" (Medium), or "Low".

Some equipment may be more sensitive to line disturbances. The lower your sensitivity setting, the longer the transfer time. To find out how you equipment may react, please see your equipment manufacturer.

Apple has determined that a small percentage of iPhone 11 displays may stop responding to touch due to an issue with the display module. Affected devices were manufactured between November 2019 and May 2020.

If your iPhone 11 has been exhibiting this issue, please use the serial number checker below to see if your device is eligible for this program. If so, Apple or an Apple Authorized Service Provider will provide service, free of charge.

Choose one of the options below to have your iPhone 11 serviced. Your iPhone will be examined prior to any service to verify that it is eligible for this program.

If your iPhone 11 has any damage which impairs the ability to complete the repair, such as a cracked screen, that issue will need to be resolved prior to the service. In some cases, there may be a cost associated with the additional repair.

The third and fourth generation A7 cameras, as well as the A9 series, have a built-in viewfinder and a tilting LCD screen on the rear with touch capabilities. There are several settings you can configure to get the most out of your EVF and monitor. Let’s take a look at them.

This article is valid for the following Sony cameras: A7 III, A7R III, A7R IV, A9 and A9 II. Some have different specifications and settings (especially concerning the EVF) so I’ve made sure to highlight this information in the article. The post can be considered valid for previous generation A7 cameras too, although they have less features (touch sensitivity being the most relevant one).

Note: throughout the article, I will mention various pages of the menu system. When entering the Menu, your A7 III will display icons on top of the screen. Each refers to a main section as you can see below.

The exact position of a setting might vary slightly from one camera to the other. Most likely, it will be on the previous or next page to the one I mention.

On older Sony cameras (mark I and II generation), Camera Settings 2 is called Custom Settings, the icons are a bit different (see below), some settings are in a different part of the menu, and there is no title or page number.

Ethics statement: we own the A7 III and A7R III, and we’ve tested all the Sony full frame cameras. We were not asked to write anything about these products, nor were we provided with any sort of compensation. Within the article, there are affiliate links. If you buy something after clicking the link, we will receive a small commission. To know more about our ethics, you can visit our full disclosure page. Thank you!

In this article we’re going to dive into a lot of parameters, but if you’ve just bought your first mirrorless camera, there is one setting I must introduce to you first.

If you choose Setting Effect ON, the monitor and viewfinder will show you the real exposure of your scene, meaning it will preview the effect of your shutter speed, aperture, ISO and exposure compensation settings. Other parameters such as the Creative Style (colour profiles) and White Balance are also represented.

This is one of the main benefits of working with a mirrorless camera. The exposure preview is very useful to see right away if you’re over or under exposing the photograph, or if the colours don’t look right. With DSLRs, you can check this by activating Live View on the rear monitor, but you can’t have it in the viewfinder since it is not electronic.

If you choose Setting Effect OFF, the camera will ignore your exposure parameters and give you optimal brightness and colours for the EVF or LCD screen, no matter the situation you’re working in. The word VIEW appears on the screen. You have to keep an eye on the metering indicator and make sure you’re using the right settings.

There are times where you want to have the best brightness possible to see what’s going in your scene, regardless of the exposure settings used. For example when working in a studio with flash, the exposure preview might be too dark because the flash emits light only when you take the photograph. Other situations where you may want Setting Effect Off is for birds in flight and astro-photography.

The next thing to look at is a dedicated button that controls the two screens of your camera (LCD and EVF): the DISP button. You can find it on the rear, on top of the control wheel.

If you press it repeatedly, you’ll see that the amount of information overlaying the LCD or EVF changes. By default the camera should show you the live view of your scene with lots of information around the four edges.

The final press will disable live view on the rear monitor and show you all the settings in use as well as the Fn menu. This last mode is not available in the EVF.

Note: the information displayed is independent for the LCD and viewfinder. For example, if you activate the histogram in the viewfinder of your A7 III, it won’t appear on the LCD screen automatically unless you press the DISP button while working with the rear monitor.

Some of the information shown when pressing the DISP button can be customised in the menu. To do this:Go to Camera Settings 2 / Display Auto Review 1 (page 6/9)

Overall there is a lot of information that can appear on the screen but there is one that won’t show. You can’t display the focal length on your A7 III or other A7 cameras. The only time this information appears on the LCD or EVF is when using a Sony Power Zoom lens such as the 18-105mm f4 G.

The A7 III viewfinder resolution is the lowest with 2.36 million dots. This is the same resolution found on the first and second generation of A7 cameras.

The Sony A7 III EVF magnification is 0.78x and it is the same found on the other recent models. Older bodies like the A7 II have a smaller magnification.

Then we have the frame rate: the Sony A7 III EVF refresh rate is approximately 60Hz and is the only camera here, along with the older mark I and II models, that doesn’t allow you to change this parameter.

The A7R III viewfinder refresh rate is set to 50/60Hz by default, but you can raise it to 100/120Hz. The same can be done with the A9 series and the A7R IV.

Note: in PAL mode, the frame rate works at 50 and 100Hz. In NTSC mode, it’s 60 or 120Hz. You can switch from PAL to NTSC in Setup Menu 2 / NTSC PAL Selector, but be aware that changing this parameter affects your video recording settings, and you may have to format the memory card. So unless you need to change it for other reasons than the EVF frame rate, I would leave it as it is.

With color temperature, you can make the EVF colours look warmer or colder. Personally I always keep it to 0 on all cameras. If you want to change this:Go to Setup Menu 1 (page 1/7)

The A7 III viewfinder brightness, as well as that of the other A7/A9 models, can be set in automatic or manual mode. Auto works well in many cases and I don’t find myself wanting to change it very often. But if I want maximum performance from the EVF, I’ll occasionally raise the brightness to +2.Go to Setup Menu 1 (page 1/7)

Note: increasing the brightness can reduce the battery life a little, but all the Sony cameras that use the NP-FZ100 unit won’t suffer too much from this.

Blackout means that when you take a picture, the EVF goes black for an instant while the exposure is being recorded. You can notice the same thing on the rear LCD screen. This happens with the mechanical, first electronic curtain and electronic shutter.

Blackouts are visible in single shot mode and in continuous mode up to 8fps (Hi setting). With the latter, the camera alternates blackouts with live view. If you set the highest drive speed of 10fps (Hi+), the live view is disabled and the camera shows you the last images taken instead. This also eliminates the LCD / EVF blackout, but you’re seeing what has just happened rather than what it is happening, so there is a lag between your scene and what is shown on the screen.

The Sony A9 and A9 series work in a different way. Thanks to their stacked sensor and superior processing speed capabilities, the cameras can maintain an uninterrupted live view when using the Silent Shooting mode (electronic shutter). There are no blackouts either because the cameras have enough power to maintain live view while recording the images. This is valid in single and continuous mode up to 20fps.

When you bring the camera to your eye, a dedicated sensor on top of the EVF (eye sensor) can disable the monitor and activate the viewfinder automatically. When you move the camera away from your face, the viewfinder is disabled and live view goes back to the LCD screen.

If you wish, you can control which screen remains active manually. In fact, the only way to disable the viewfinder on Sony cameras is to deactivate the Finder / Monitor automatic switch. To do this:Go to Camera Settings 2 / Display Auto Review 1 (page 6/9)

This method is useful in situations where you’re only working with the rear monitor, and you don’t want the camera accidentally disabling it when your fingers are close to the eye sensor. The sensor can also be triggered by keeping the camera too close to your body.

There aren’t specific settings for the rear monitor apart from the brightness adjustments. (For touch screen capabilities, please refer to the dedicated chapter below.)

With Manual you can set brightness in ±2 steps. I leave it to +2 because the default value (0) is not very bright, especially when working outside. Sunny Weather boosts the brightness further, but also makes colours look unnatural so I tend to avoid it (+2 in manual mode is enough).

I have a screen protector on my A7 III and A7R III. They are inexpensive, don’t interfere with touch operation and give an extra layer of protection to the rear monitor of your camera. Check out our dedicated accessory article to find out more.

Note: with both methods, TouchPad on the screen remains active if this option is enabled. You can find out more about the touch screen capabilities further down.

With High, the quality of the LCD and EVF increases because the resolution increases. In other words, the EVF and LCD use the full resolution available whereas with Normal, it drops to preserve more battery life.

It is useful to set Display Quality to High when manually focusing, or working in a situation where there are a lot of details in your scene and you want to see them better. The difference is not immediately noticeable but small details are crisper and there is no aliasing.

You can activate a series of thin grey lines in the live view to help you with the composition. There are three options:Rule of 3rds Grid: the screen is divided into 9 blocks to represent the classic rule of third composition in photography

When shooting in continuous mode, the camera can display an indicator (vertical bar) on the left to show you how much buffer memory is left. When the bar is almost empty, the word SLOW will appear and the continuous shooting speed will decrease. There are two options:Always Display: the bar is always displayed when you are in continuous shooting mode

I always turn this off because I prefer to go back to live view as soon as possible after taking a shot. If you prefer, you can have the image you just captured appear on the EVF or LCD for a set duration (2s to 10s).

You can enable or disable the focus areas that appear when the camera is focusing in continuous AF mode (Disp. cont. AF area), as well as see the zone covered by phase detection points (Phase Detect. Area).

When recording video with a S-Log or HLG profile, enabling the Gamma Disp. Assist makes the image preview on the LCD or EVF appear with natural contrast and colours, as opposed to the flat and desaturated look of an S-Log gamma curve.

The first MF assist on the A7 III & co. is called Focus Magnifier and it is the one I use the most. You can assign it to a function button and it allows you to zoom in on your scene to see if the details are sharp.

You can configure how long the magnification remains active (2s, 5s or No Limit), as well as set which magnification starts first when you press the button (1x or 6.2x). You’ll find these options in Camera Settings 1 / Focus Assist (page 13/14). Look for Focus Magnif. Time and Initial Focus Mag.*

I found that Focus Magnifier is the best way to check focus accuracy on the A7 cameras. Unfortunately in video mode, the resolution of the live view decreases a lot so details are not as sharp as when working in still mode. Often I fine tune my focus point in still mode and then switch to movie mode.

The magnification assist also works in AF-S mode. Once magnified, you can half press the shutter button (or press the back focus button) to focus while you are in magnification mode. A green cross in the middle of the screen will confirm that focus is acquired.

With a lens that has electronic contacts, you can set the Focus Magnifier to activate automatically when turning the focus ring on your lens. To do that, turn MF Assist On in Camera Settings 1 / Focus Assist (page 13/14).

You can choose three levels (High, Mid, Low) and three colours (Red, Yellow or White). You can configure these settings in Camera Settings 1 / Focus Assist (page 13/14) by entering Peaking Setting.

Low gives you fewer coloured outlines which makes it easier to focus more precisely. However in some situations (such as when the subject is not close enough), they might not appear at all unless you set it to Mid level. As for colours, it really depends on the colours of your scene. I generally go for yellow or red.

Peaking can be useful to perform a quick adjustment and set focus on the right area. For fine tune adjustments however, it can lack some precision, so I would always double check with the Focus Magnifier.

Peaking can be easier to use when the live view is in Black and White. Unfortunately there isn’t a setting to make the EVF or LCD monochrome. The workaround is to select the B&W Creative Style (Camera Settings 1, page 12/14) and turn On Setting Effect for the Live View Display (Camera Settings 2, page 7/9). This works if you’re shooting RAW files because they are not affected by the Creative Style settings. If you’re shooting JPGs, this is not ideal because you’ll end up with B&W images!

The rear monitor of the A7 III, A7 IV and A9 series is touch sensitive. There isn’t a lot you can do with it unlike many of the competing cameras from other brands.

There is no touch shutter mode on the A7 III or other E-mount full frame cameras for example. This is curious because Sony implemented this functionality onto the old a5100 APS-C camera and also the recent a6400. Why they haven’t implemented touch shutter on all compatible models remains an enigma.

In Setup 2, you’ll find Touch Operation where you simply enable or disable touch sensitivity. If touch focus isn’t working on your A7 model, it is likely because the setting is disabled.

First, you need an HDMI cable. All the A7/A9 cameras have a Micro Type D port, so you’ll likely need a Micro D to full size HDMI lead (but check the input of you monitor to be sure).

If you’re connecting your A7 III to an external recorder, or want to monitor your composition without distractions, make sure that the camera doesn’t embed the setting information you see on the LCD screen, but rather gives you a clean video output.

For an external recorder, there are additional settings (excluding the A7 I series):Turn the TC Output (TimeCode) On or Off depending on your needs. This is a bit advanced if you’re just starting out, so if in doubt leave it off.

If you want to control the external recorder from the camera (Start/Stop the recording), turn On REC Control. Note that TC Output also needs to be On for this to work.

The rear LCD of the camera should remain active, and you should see the clean video feed on the external recorder connected to your A7 III. From there, you need to set up the recording on the external device. Refer to the manual of the specific model you are using.

Note: when your Sony A7 III is connected to the external recorder, the LCD screen of the camera can go black when triggering the recording from the camera.

In Setup page 4, you’ll find the 4K Output Sel. setting with two options:Memory Card + HDMI: record 4K on the SD card while sending a 4K signal via HDMI at the same time, which means you can record on both camera and recorder.

HDMI Only (24p, 25p or 30p): 4K is available via the HDMI output only. The frame rate is 24 or 30p (NTSC), or 25p (PAL). You cannot record 4K video internally on the SD card.

If you want to replicate the exact view you get on the rear LCD of your camera, including all the information on the screen, turn On the HDMI Info. Display. The rear LCD of your camera will turn off and you can work with the external monitor instead.

Note: if you have set up 4K recording in the camera, the info won’t be displayed on the external monitor. You need to select XAVC S HD or AVCHD for this to work.

You interact with a touch screen monitor constantly throughout your daily life. You will see them in cell phones, ATM’s, kiosks, ticket vending machines, manufacturing plants and more. All of these use touch panels to enable the user to interact with a computer or device without the use of a keyboard or mouse. But did you know there are several uniquely different types of Touch Screens? The five most common types of touch screen are: 5-Wire Resistive, Surface Capacitive touch, Projected Capacitive (P-Cap), SAW (Surface Acoustic Wave), and IR (Infrared).

We are often asked “How does a touch screen monitor work?” A touch screen basically replaces the functionality of a keyboard and mouse. Below is a basic description of 5 types of touch screen monitor technology. The advantages and disadvantages of type of touch screen will help you decide which type touchscreen is most appropriate for your needs:

5-Wire Resistive Touch is the most widely touch technology in use today. A resistive touch screen monitor is composed of a glass panel and a film screen, each covered with a thin metallic layer, separated by a narrow gap. When a user touches the screen, the two metallic layers make contact, resulting in electrical flow. The point of contact is detected by this change in voltage.

Surface Capacitive touch screen is the second most popular type of touch screens on the market. In a surface capacitive touch screen monitor, a transparent electrode layer is placed on top of a glass panel. This is then covered by a protective cover. When an exposed finger touches the monitor screen, it reacts to the static electrical capacity of the human body. Some of the electrical charge transfers from the screen to the user. This decrease in capacitance is detected by sensors located at the four corners of the screen, allowing the controller to determine the touch point. Surface capacitive touch screens can only be activated by the touch of human skin or a stylus holding an electrical charge.

Projected Capacitive (P-Cap) is similar to Surface Capacitive, but it offers two primary advantages. First, in addition to a bare finger, it can also be activated with surgical gloves or thin cotton gloves. Secondly, P-Cap enables multi-touch activation (simultaneous input from two or more fingers). A projected capacitive touch screen is composed of a sheet of glass with embedded transparent electrode films and an IC chip. This creates a three dimensional electrostatic field. When a finger comes into contact with the screen, the ratios of the electrical currents change and the computer is able to detect the touch points. All our P-Cap touch screens feature a Zero-Bezel enclosure.

SAW (Surface Acoustic Wave) touch screen monitors utilize a series of piezoelectric transducers and receivers. These are positioned along the sides of the monitor’s glass plate to create an invisible grid of ultrasonic waves on the surface. When the panel is touched, a portion of the wave is absorbed. This allows the receiving transducer to locate the touch point and send this data to the computer. SAW monitors can be activated by a finger, gloved hand, or soft-tip stylus. SAW monitors offer easy use and high visibility.

IR (Infrared) type touch screen monitors do not overlay the display with an additional screen or screen sandwich. Instead, infrared monitors use IR emitters and receivers to create an invisible grid of light beams across the screen. This ensures the best possible image quality. When an object interrupts the invisible infrared light beam, the sensors are able to locate the touch point. The X and Y coordinates are then sent to the controller.

We hope you found these touch screen basics useful. TRU-Vu provides industrial touch screen monitors in a wide range of sizes and configurations. This includes UL60601-1 Medical touch screens, Sunlight Readable touch screens,Open Frame touch screens, Waterproof touch screens and many custom touch screen designs. You can learn more HERE or call us at 847-259-2344. To address safety and hygiene concerns, see our article on “Touch Screen Cleaning and Disinfecting“.

Under Device Specifications, if the Pen and touch section reads No pen or touch input is available for this display, the computer does not have a touch screen.

NOTE: For touch-enabled Dell monitors, verify that the USB cable is connected from the monitor to the computer to enable the touch screen feature. To learn more about how to connect the USB cable between the monitor and the computer, see the User Guide of the Dell monitor.

A simple reboot can resolve many issues almost immediately. Restarting the computer is an effective way to clear the memory (RAM) and ensure that any errant processes and services that have started are shut down.

Restarting the computer closes all the applications and software that are running on the computer. This includes applications running on the taskbar and services that are running in the background.

Use a soft and clean microfiber cloth that is lightly dampened with water to clean the monitor. Avoid using detergents of any kind as they can leave a milky film on the monitor.

To clean the anti-static screen, we recommend using a special screen-cleaning tissue or solution that is suitable for the anti-static coating on LCD panels.

NOTE: In some cases, the screen protector or screen guard may prevent the touch screen from registering that you are touching the screen and may need to be removed (this may occur if it is not designed for a capacitive touch screen or if it has air bubbles in it).

NOTE: Using a non-standard or unsupported digital pen, stylus, or regular pen to write can damage the touch screen. Select Dell 2-in-1 laptops are compatible with digital pens like Dell Active Pen. See the User Guide of the Dell 2-in-1 laptop or the Dell Active Pen for more information.

The touch screen of the computer may not respond because it is disabled or it needs to be reinstalled. Use Windows Device Manager to enable or reinstall the touch screen driver.

NOTE: For touch-enabled Dell monitors, verify that the USB cable is connected from the monitor to the computer to enable the touch screen feature. To learn more about how to connect the USB cable between the monitor and the computer, see the User Guide of the Dell monitor.

NOTE: The touch screen drivers are built-in to the latest operating systems such as Windows 10, 8.1, 8, or 7. Windows Update helps download the latest touch screen driver that is applicable to your computer (if required).

NOTE: Using a non-standard or unsupported digital pen, stylus, or a regular pen to write can damage the touch screen. Select Dell 2-in-1 laptops are compatible with digital pens such as the Dell Active Pen. See the User Guide of the Dell 2-in-1 laptop or the Dell Active Pen for more information.

Windows updates can support your Windows operating system in many ways. Windows updates can solve specific problems, provide protection from malicious attacks, or even add new features to the operating system.

NOTE: If Dell SupportAssist is not installed on your computer, you will be prompted to complete the installation to run the diagnostic test. Follow the on-screen instructions to complete the installation process of Dell SupportAssist.

Power settings can cause the touch screen to stop working after waking the computer from sleep mode. Change the power settings so that the touch screen stays active while the computer is in sleep mode.

Dell recommends updating the device drivers and BIOS as part of your scheduled update cycle. These device drivers and BIOS updates may contain feature enhancements or changes that help keep your system software current and compatible with other system modules (hardware and software) as well as increased stability.

System Restore is a built-in Windows tool that is designed to protect and repair the operating system. When something goes wrong with your computer, System Restore must be used before restoring the computer to factory defaults.

Dell computers are built with a small amount of hard disk space that is reserved for reinstalling the operating system. This method is the easiest way to restore your Dell computer to factory condition. The restoration process deletes all user data from the computer, so be sure to back up all your files before starting this process.

Select the operating system that is installed on your Dell computer to find more information about how to restore your Dell computer to factory defaults:

A touchscreen or touch screen is the assembly of both an input ("touch panel") and output ("display") device. The touch panel is normally layered on the top of an electronic visual display of an information processing system. The display is often an LCD, AMOLED or OLED display while the system is usually used in a laptop, tablet, or smartphone. A user can give input or control the information processing system through simple or multi-touch gestures by touching the screen with a special stylus or one or more fingers.zooming to increase the text size.

The touchscreen enables the user to interact directly with what is displayed, rather than using a mouse, touchpad, or other such devices (other than a stylus, which is optional for most modern touchscreens).

Touchscreens are common in devices such as game consoles, personal computers, electronic voting machines, and point-of-sale (POS) systems. They can also be attached to computers or, as terminals, to networks. They play a prominent role in the design of digital appliances such as personal digital assistants (PDAs) and some e-readers. Touchscreens are also important in educational settings such as classrooms or on college campuses.

The popularity of smartphones, tablets, and many types of information appliances is driving the demand and acceptance of common touchscreens for portable and functional electronics. Touchscreens are found in the medical field, heavy industry, automated teller machines (ATMs), and kiosks such as museum displays or room automation, where keyboard and mouse systems do not allow a suitably intuitive, rapid, or accurate interaction by the user with the display"s content.

Historically, the touchscreen sensor and its accompanying controller-based firmware have been made available by a wide array of after-market system integrators, and not by display, chip, or motherboard manufacturers. Display manufacturers and chip manufacturers have acknowledged the trend toward acceptance of touchscreens as a user interface component and have begun to integrate touchscreens into the fundamental design of their products.

The prototypeCERNFrank Beck, a British electronics engineer, for the control room of CERN"s accelerator SPS (Super Proton Synchrotron). This was a further development of the self-capacitance screen (right), also developed by Stumpe at CERN

One predecessor of the modern touch screen includes stylus based systems. In 1946, a patent was filed by Philco Company for a stylus designed for sports telecasting which, when placed against an intermediate cathode ray tube display (CRT) would amplify and add to the original signal. Effectively, this was used for temporarily drawing arrows or circles onto a live television broadcast, as described in US 2487641A, Denk, William E, "Electronic pointer for television images", issued 1949-11-08. Later inventions built upon this system to free telewriting styli from their mechanical bindings. By transcribing what a user draws onto a computer, it could be saved for future use. See US 3089918A, Graham, Robert E, "Telewriting apparatus", issued 1963-05-14.

The first version of a touchscreen which operated independently of the light produced from the screen was patented by AT&T Corporation US 3016421A, Harmon, Leon D, "Electrographic transmitter", issued 1962-01-09. This touchscreen utilized a matrix of collimated lights shining orthogonally across the touch surface. When a beam is interrupted by a stylus, the photodetectors which no longer are receiving a signal can be used to determine where the interruption is. Later iterations of matrix based touchscreens built upon this by adding more emitters and detectors to improve resolution, pulsing emitters to improve optical signal to noise ratio, and a nonorthogonal matrix to remove shadow readings when using multi-touch.

The first finger driven touch screen was developed by Eric Johnson, of the Royal Radar Establishment located in Malvern, England, who described his work on capacitive touchscreens in a short article published in 1965Frank Beck and Bent Stumpe, engineers from CERN (European Organization for Nuclear Research), developed a transparent touchscreen in the early 1970s,In the mid-1960s, another precursor of touchscreens, an ultrasonic-curtain-based pointing device in front of a terminal display, had been developed by a team around Rainer Mallebrein[de] at Telefunken Konstanz for an air traffic control system.Einrichtung" ("touch input facility") for the SIG 50 terminal utilizing a conductively coated glass screen in front of the display.

In 1972, a group at the University of Illinois filed for a patent on an optical touchscreenMagnavox Plato IV Student Terminal and thousands were built for this purpose. These touchscreens had a crossed array of 16×16 infrared position sensors, each composed of an LED on one edge of the screen and a matched phototransistor on the other edge, all mounted in front of a monochrome plasma display panel. This arrangement could sense any fingertip-sized opaque object in close proximity to the screen. A similar touchscreen was used on the HP-150 starting in 1983. The HP 150 was one of the world"s earliest commercial touchscreen computers.infrared transmitters and receivers around the bezel of a 9-inch Sony cathode ray tube (CRT).

In 1977, an American company, Elographics – in partnership with Siemens – began work on developing a transparent implementation of an existing opaque touchpad technology, U.S. patent No. 3,911,215, October 7, 1975, which had been developed by Elographics" founder George Samuel Hurst.World"s Fair at Knoxville in 1982.

In 1984, Fujitsu released a touch pad for the Micro 16 to accommodate the complexity of kanji characters, which were stored as tiled graphics.Sega released the Terebi Oekaki, also known as the Sega Graphic Board, for the SG-1000 video game console and SC-3000 home computer. It consisted of a plastic pen and a plastic board with a transparent window where pen presses are detected. It was used primarily with a drawing software application.

Touch-sensitive control-display units (CDUs) were evaluated for commercial aircraft flight decks in the early 1980s. Initial research showed that a touch interface would reduce pilot workload as the crew could then select waypoints, functions and actions, rather than be "head down" typing latitudes, longitudes, and waypoint codes on a keyboard. An effective integration of this technology was aimed at helping flight crews maintain a high level of situational awareness of all major aspects of the vehicle operations including the flight path, the functioning of various aircraft systems, and moment-to-moment human interactions.

In the early 1980s, General Motors tasked its Delco Electronics division with a project aimed at replacing an automobile"s non-essential functions (i.e. other than throttle, transmission, braking, and steering) from mechanical or electro-mechanical systems with solid state alternatives wherever possible. The finished device was dubbed the ECC for "Electronic Control Center", a digital computer and software control system hardwired to various peripheral sensors, servos, solenoids, antenna and a monochrome CRT touchscreen that functioned both as display and sole method of input.stereo, fan, heater and air conditioner controls and displays, and was capable of providing very detailed and specific information about the vehicle"s cumulative and current operating status in real time. The ECC was standard equipment on the 1985–1989 Buick Riviera and later the 1988–1989 Buick Reatta, but was unpopular with consumers—partly due to the technophobia of some traditional Buick customers, but mostly because of costly technical problems suffered by the ECC"s touchscreen which would render climate control or stereo operation impossible.

Multi-touch technology began in 1982, when the University of Toronto"s Input Research Group developed the first human-input multi-touch system, using a frosted-glass panel with a camera placed behind the glass. In 1985, the University of Toronto group, including Bill Buxton, developed a multi-touch tablet that used capacitance rather than bulky camera-based optical sensing systems (see History of multi-touch).

The first commercially available graphical point-of-sale (POS) software was demonstrated on the 16-bit Atari 520ST color computer. It featured a color touchscreen widget-driven interface.COMDEX expo in 1986.

In 1987, Casio launched the Casio PB-1000 pocket computer with a touchscreen consisting of a 4×4 matrix, resulting in 16 touch areas in its small LCD graphic screen.

Touchscreens had a bad reputation of being imprecise until 1988. Most user-interface books would state that touchscreen selections were limited to targets larger than the average finger. At the time, selections were done in such a way that a target was selected as soon as the finger came over it, and the corresponding action was performed immediately. Errors were common, due to parallax or calibration problems, leading to user frustration. "Lift-off strategy"University of Maryland Human–Computer Interaction Lab (HCIL). As users touch the screen, feedback is provided as to what will be selected: users can adjust the position of the finger, and the action takes place only when the finger is lifted off the screen. This allowed the selection of small targets, down to a single pixel on a 640×480 Video Graphics Array (VGA) screen (a standard of that time).

Sears et al. (1990)human–computer interaction of the time, describing gestures such as rotating knobs, adjusting sliders, and swiping the screen to activate a switch (or a U-shaped gesture for a toggle switch). The HCIL team developed and studied small touchscreen keyboards (including a study that showed users could type at 25 wpm on a touchscreen keyboard), aiding their introduction on mobile devices. They also designed and implemented multi-touch gestures such as selecting a range of a line, connecting objects, and a "tap-click" gesture to select while maintaining location with another finger.

In 1990, HCIL demonstrated a touchscreen slider,lock screen patent litigation between Apple and other touchscreen mobile phone vendors (in relation to

An early attempt at a handheld game console with touchscreen controls was Sega"s intended successor to the Game Gear, though the device was ultimately shelved and never released due to the expensive cost of touchscreen technology in the early 1990s.

Touchscreens would not be popularly used for video games until the release of the Nintendo DS in 2004.Apple Watch being released with a force-sensitive display in April 2015.

In 2007, 93% of touchscreens shipped were resistive and only 4% were projected capacitance. In 2013, 3% of touchscreens shipped were resistive and 90% were projected capacitance.

A resistive touchscreen panel comprises several thin layers, the most important of which are two transparent electrically resistive layers facing each other with a thin gap between. The top layer (that which is touched) has a coating on the underside surface; just beneath it is a similar resistive layer on top of its substrate. One layer has conductive connections along its sides, the other along top and bottom. A voltage is applied to one layer and sensed by the other. When an object, such as a fingertip or stylus tip, presses down onto the outer surface, the two layers touch to become connected at that point.voltage dividers, one axis at a time. By rapidly switching between each layer, the position of pressure on the screen can be detected.

Resistive touch is used in restaurants, factories and hospitals due to its high tolerance for liquids and contaminants. A major benefit of resistive-touch technology is its low cost. Additionally, as only sufficient pressure is necessary for the touch to be sensed, they may be used with gloves on, or by using anything rigid as a finger substitute. Disadvantages include the need to press down, and a risk of damage by sharp objects. Resistive touchscreens also suffer from poorer contrast, due to having additional reflections (i.e. glare) from the layers of material placed over the screen.3DS family, and the Wii U GamePad.

Surface acoustic wave (SAW) technology uses ultrasonic waves that pass over the touchscreen panel. When the panel is touched, a portion of the wave is absorbed. The change in ultrasonic waves is processed by the controller to determine the position of the touch event. Surface acoustic wave touchscreen panels can be damaged by outside elements. Contaminants on the surface can also interfere with the functionality of the touchscreen.

The Casio TC500 Capacitive touch sensor watch from 1983, with angled light exposing the touch sensor pads and traces etched onto the top watch glass surface.

A capacitive touchscreen panel consists of an insulator, such as glass, coated with a transparent conductor, such as indium tin oxide (ITO).electrostatic field, measurable as a change in capacitance. Different technologies may be used to determine the location of the touch. The location is then sent to the controller for processing. Touchscreens that use silver instead of ITO exist, as ITO causes several environmental problems due to the use of indium.complementary metal-oxide-semiconductor (CMOS) application-specific integrated circuit (ASIC) chip, which in turn usually sends the signals to a CMOS digital signal processor (DSP) for processing.

Unlike a resistive touchscreen, some capacitive touchscreens cannot be used to detect a finger through electrically insulating material, such as gloves. This disadvantage especially affects usability in consumer electronics, such as touch tablet PCs and capacitive smartphones in cold weather when people may be wearing gloves. It can be overcome with a special capacitive stylus, or a special-application glove with an embroidered patch of conductive thread allowing electrical contact with the user"s fingertip.

A low-quality switching-mode power supply unit with an accordingly unstable, noisy voltage may temporarily interfere with the precision, accuracy and sensitivity of capacitive touch screens.

Some capacitive display manufacturers continue to develop thinner and more accurate touchscreens. Those for mobile devices are now being produced with "in-cell" technology, such as in Samsung"s Super AMOLED screens, that eliminates a layer by building the capacitors inside the display itself. This type of touchscreen reduces the visible distance between the user"s finger and what the user is touching on the screen, reducing the thickness and weight of the display, which is desirable in smartphones.

A simple parallel-plate capacitor has two conductors separated by a dielectric layer. Most of the energy in this system is concentrated directly between the plates. Some of the energy spills over into the area outside the plates, and the electric field lines associated with this effect are called fringing fields. Part of the challenge of making a practical capacitive sensor is to design a set of printed circuit traces which direct fringing fields into an active sensing area accessible to a user. A parallel-plate capacitor is not a good choice for such a sensor pattern. Placing a finger near fringing electric fields adds conductive surface area to the capacitive system. The additional charge storage capacity added by the finger is known as finger capacitance, or CF. The capacitance of the sensor without a finger present is known as parasitic capacitance, or CP.

In this basic technology, only one side of the insulator is coated with a conductive layer. A small voltage is applied to the layer, resulting in a uniform electrostatic field. When a conductor, such as a human finger, touches the uncoated surface, a capacitor is dynamically formed. The sensor"s controller can determine the location of the touch indirectly from the change in the capacitance as measured from the four corners of the panel. As it has no moving parts, it is moderately durable but has limited resolution, is prone to false signals from parasitic capacitive coupling, and needs calibration during manufacture. It is therefore most often used in simple applications such as industrial controls and kiosks.

Although some standard capacitance detection methods are projective, in the sense that they can be used to detect a finger through a non-conductive surface, they are very sensitive to fluctuations in temperature, which expand or contract the sensing plates, causing fluctuations in the capacitance of these plates.

Projected capacitive touch (PCT; also PCAP) technology is a variant of capacitive touch technology but where sensitivity to touch, accuracy, resolution and speed of touch have been greatly improved by the use of a simple form of

Some modern PCT touch screens are composed of thousands of discrete keys,etching a single conductive layer to form a grid pattern of electrodes, by etching two separate, perpendicular layers of conductive material with parallel lines or tracks to form a grid, or by forming an x/y grid of fine, insulation coated wires in a single layer . The number of fingers that can be detected simultaneously is determined by the number of cross-over points (x * y) . However, the number of cross-over points can be almost doubled by using a diagonal lattice layout, where, instead of x elements only ever crossing y elements, each conductive element crosses every other element .

In some designs, voltage applied to this grid creates a uniform electrostatic field, which can be measured. When a conductive object, such as a finger, comes into contact with a PCT panel, it distorts the local electrostatic field at that point. This is measurable as a change in capacitance. If a finger bridges the gap between two of the "tracks", the charge field is further interrupted and detected by the controller. The capacitance can be changed and measured at every individual point on the grid. This system is able to accurately track touches.

Unlike traditional capacitive touch technology, it is possible for a PCT system to sense a passive stylus or gloved finger. However, moisture on the surface of the panel, high humidity, or collected dust can interfere with performance.

These environmental factors, however, are not a problem with "fine wire" based touchscreens due to the fact that wire based touchscreens have a much lower "parasitic" capacitance, and there is greater distance between neighbouring conductors.

This is a common PCT approach, which makes use of the fact that most conductive objects are able to hold a charge if they are very close together. In mutual capacitive sensors, a capacitor is inherently formed by the row trace and column trace at each intersection of the grid. A 16×14 array, for example, would have 224 independent capacitors. A voltage is applied to the rows or columns. Bringing a finger or conductive stylus close to the surface of the sensor changes the local electrostatic field, which in turn reduces the mutual capacitance. The capacitance change at every individual point on the grid can be measured to accurately determine the touch location by measuring the voltage in the other axis. Mutual capacitance allows multi-touch operation where multiple fingers, palms or styli can be accurately tracked at the same time.

Self-capacitance sensors can have the same X-Y grid as mutual capacitance sensors, but the columns and rows operate independently. With self-capacitance, the capacitive load of a finger is measured on each column or row electrode by a current meter, or the change in frequency of an RC oscillator.

Self-capacitive touch screen layers are used on mobile phones such as the Sony Xperia Sola,Samsung Galaxy S4, Galaxy Note 3, Galaxy S5, and Galaxy Alpha.

Self capacitance is far more sensitive than mutual capacitance and is mainly used for single touch, simple gesturing and proximity sensing where the finger does not even have to touch the glass surface.

Capacitive touchscreens do not necessarily need to be operated by a finger, but until recently the special styli required could be quite expensive to purchase. The cost of this technology has fallen greatly in recent years and capacitive styli are now widely available for a nominal charge, and often given away free with mobile accessories. These consist of an electrically conductive shaft with a soft conductive rubber tip, thereby resistively connecting the fingers to the tip of the stylus.

Infrared sensors mounted around the display watch for a user"s touchscreen input on this PLATO V terminal in 1981. The monochromatic plasma display"s characteristic orange glow is illustrated.

An infrared touchscreen uses an array of X-Y infrared LED and photodetector pairs around the edges of the screen to detect a disruption in the pattern of LED beams. These LED beams cross each other in vertical and horizontal patterns. This helps the sensors pick up the exact location of the touch. A major benefit of such a system is that it can detect essentially any opaque object including a finger, gloved finger, stylus or pen. It is generally used in outdoor applications and POS systems that cannot rely on a conductor (such as a bare finger) to activate the touchscreen. Unlike capacitive touchscreens, infrared touchscreens do not require any patterning on the glass which increases durability and optical clarity of the overall system. Infrared touchscreens are sensitive to dirt and dust that can interfere with the infrared beams, and suffer from parallax in curved surfaces and accidental press when the user hovers a finger over the screen while searching for the item to be selected.

A translucent acrylic sheet is used as a rear-projection screen to display information. The edges of the acrylic sheet are illuminated by infrared LEDs, and infrared cameras are focused on the back of the sheet. Objects placed on the sheet are detectable by the cameras. When the sheet is touched by the user, frustrated total internal reflection results in leakage of infrared light which peaks at the points of maximum pressure, indicating the user"s touch location. Microsoft"s PixelSense tablets use this technology.

Optical touchscreens are a relatively modern development in touchscreen technology, in which two or more image sensors (such as CMOS sensors) are placed around the edges (mostly the corners) of the screen. Infrared backlights are placed in the sensor"s field of view on the opposite side of the screen. A touch blocks some lights from the sensors, and the location and size of the touching object can be calculated (see visual hull). This technology is growing in popularity due to its scalability, versatility, and affordability for larger touchscreens.

Introduced in 2002 by 3M, this system detects a touch by using sensors to measure the piezoelectricity in the glass. Complex algorithms interpret this information and provide the actual location of the touch.

The key to this technology is that a touch at any one position on the surface generates a sound wave in the substrate which then produces a unique combined signal as measured by three or more tiny transducers attached to the edges of the touchscreen. The digitized signal is compared to a list corresponding to every position on the surface, determining the touch location. A moving touch is tracked by rapid repetition of this process. Extraneous and ambient sounds are ignored since they do not match any stored sound profile. The technology differs from other sound-based technologies by using a simple look-up method rather than expensive signal-processing hardware. As with the dispersive signal technology system, a motionless finger cannot be detected after the initial touch. However, for the same reason, the touch recognition is not disrupted by any resting objects. The technology was created by SoundTouch Ltd in the early 2000s, as described by the patent family EP1852772, and introduced to the market by Tyco International"s Elo division in 2006 as Acoustic Pulse Recognition.

There are several principal ways to build a touchscreen. The key goals are to recognize one or more fingers touching a display, to interpret the command that this represents, and to communicate the command to the appropriate application.

Dispersive-signal technology measures the piezoelectric effect—the voltage generated when mechanical force is applied to a material—that occurs chemically when a strengthened glass substrate is touched.

There are two infrared-based approaches. In one, an array of sensors detects a finger touching or almost touching the display, thereby interrupting infrared light beams projected over the screen. In the other, bottom-mounted infrared cameras record heat from screen touches.

The development of multi-touch screens facilitated the tracking of more than one finger on the screen; thus, operations that require more than one finger are possible. These devices also allow multiple users to interact with the touchscreen simultaneously.

With the growing use of touchscreens, the cost of touchscreen technology is routinely absorbed into the products that incorporate it and is nearly eliminated. Touchscreen technology has demonstrated reliability and is found in airplanes, automobiles, gaming consoles, machine control systems, appliances, and handheld display devices including cellphones; the touchscreen market for mobile devices was projected to produce US$5 billion by 2009.

The ability to accurately point on the screen itself is also advancing with the emerging graphics tablet-screen hybrids. Polyvinylidene fluoride (PVDF) plays a major role in this innovation due its high piezoelectric properties, which allow the tablet to sense pressure, making such things as digital painting behave more like paper and pencil.

TapSense, announced in October 2011, allows touchscreens to distinguish what part of the hand was used for input, such as the fingertip, knuckle and fingernail. This could be used in a variety of ways, for example, to copy and paste, to capitalize letters, to activate different drawing modes, etc.

A real practical integration between television-images and the functions of a normal modern PC could be an innovation in the near future: for example "all-live-information" on the internet about a film or the actors on video, a list of other music during a normal video clip of a song or news about a person.

For touchscreens to be effective input devices, users must be able to accurately select targets and avoid accidental selection of adjacent targets. The design of touchscreen interfaces should reflect technical capabilities of the system, ergonomics, cognitive psychology and human physiology.

Guidelines for touchscreen designs were first developed in the 2000s, based on early research and actual use of older systems, typically using infrared grids—which were highly dependent on the size of the user"s fingers. These guidelines are less relevant for the bulk of modern touch devices which use capacitive or resistive touch technology.

From the mid-2000s, makers of operating systems for smartphones have promulgated standards, but these vary between manufacturers, and allow for significant variation in size based on technology changes, so are unsuitable from a human factors perspective.

Much more important is the accuracy humans have in selecting targets with their finger or a pen stylus. The accuracy of user selection varies by position on the screen: users are most a