lcd touch screen calibration factory

Some of the first Android devices up to Android 4.0 (Ice Cream Sandwich) had a built-in calibration option. Depending on the device and Android version, the location of this setting varies but is generally at Menu > Settings > Language & keyboard > Touch Input > Text Input. UnderFinger touch precision, tap Calibration tool or Reset calibration.

Over time, the touchscreen on your Android device might start to falter. Before you consider replacing your device, you should see if touchscreen calibration can fix any issues. Here’s how to recalibrate your Android smartphone or tablet.

Modern Android touchscreens rarely require the user to calibrate or otherwise configure it. Touchscreen faults are more likely to be caused by hardware issues that cannot be fixed than any particular configuration problem.

For instance, it can be a good way to adjust the sensitivity of your touchscreen, especially if there’s something else impacting it. Certain types of screen protectors, for instance, might affect your touchscreen performance. This is an issue a calibration can sometimes improve.

It’s also good to try this on older devices where the technology wasn’t as advanced and calibration can have a greater and more noticeable impact. There’s no harm in performing a touchscreen calibration, regardless of its age, but older devices are likely to benefit more from it.

Older versions of Android included secret menus and developer options that allowed you to test and calibrate your touchscreen. This was important on older Android devices, when modern touchscreens were still in their infancy.

If you have an older Android phone, you can attempt to access this secret touchscreen menu by dialing *#*#2664#*#*. This option won’t work on Android devices from Android 5 Lollipop onwards.

For modern Android devices, apps are available in the Google Play Store that will allow you to test the touchscreen instead. These will show you the responses to your touch on the screen, helping you to judge whether the screen is calibrated correctly or not. A good option to try is Touch Screen Test.

The app will, like a paintbrush, record white dots where your fingers are pressed. If the responses are laggy or otherwise out of sync, that would indicate a problem with your screen that calibration could fix as a first resort.

As we’ve mentioned, older versions of Android included built-in calibration testing. These tools allowed you to test and calibrate your touchscreen to determine whether it was functioning properly.

This feature has been removed in more recent Android versions. For most modern Android devices, the only option to calibrate your touchscreen is to revert to a calibration app from the Google Play Store.

A good app to try is the appropriately named Touchscreen Calibration. To begin, install the app from the Google Play Store. Next, open the app and tap the “Calibrate” button in the center to begin.

There are six touch tests for you to complete from single tapping to pinching. Follow the onscreen instructions and complete each test. When the test is complete, you’ll see a confirmation message.

If the touchscreen still isn’t working correctly after calibration, there could be underlying issues with Android that only a factory reset can resolve. A factory reset is the nuclear option and has no guarantees that it will resolve any issues with your touchscreen.

Resetting your Android device will remove all existing apps and clear any caches or settings that might be affecting your device’s touchscreen configuration. It might resolve any touchscreen delays that are a symptom of a wider problem. A device with heavy lag issues, for instance, might be caused by a lack of available resources, which a reset might fix.

Tap the Mode button (see green rectangle in image below) on the bottom edge of the screen to go to the Setup menu. On a wall-mount touchscreen this is accessible after removing the screen from the wall. Portable wired touchscreens have a door below the display that hinges toward you to reveal the buttons and LEDs. The wireless handheld P-LCD has a plastic door that opens at the top (thinner edge, opposite the power button), after which you tilt the antenna up to access the button.

There are separate instructions below, depending on which hardware model and which firmware version it’s running. The model type is on a sticker found on the back of the touchscreen.

A white screen with a + symbol will show up in the top left corner. Tap it with your finger or stylus, and repeat for the other four that subsequently pop up after each press.

Press {Clear} to clear the drawings you make on the screen, {Recalibrate} to start the process over if it still is not correct, or {Close} to return to your configuration, or the Setup menu.

In Paradigm 3.0.0 we introduced gestures to P-TS7 hardware, which requires a thin band of pixels on the outside edge of the screen to detect those movements. The way of calibrating touchscreens in software versions lower than 3.0.0 has enough variability that the calibration may cause that thin band of pixels to be missing from the screen.

Press {Screen} screen button and then press {Calibrate Touchscreen} in the bottom left of the screen. You’ll see a screen much like the previous instructions, however there is no + symbols to touch.

In Paradigm 4.0.0 we removed the ability to calibrate the P-TS7 touchscreens in the field. The factory sets the calibration during manufacturing, and much like your cell phone or home tablet, never should need to be calibrated again. Instead of a {Calibrate Touchscreen} button in the Setup menu, you"ll see a {Test Touchscreen} button, which goes to a white screen with a {Close} button. This utility is great for verifying that it takes touch properly. Pushing and holding the Mode button will also get you access to the test screen.

In the previous article, I described the steps needed to install an LCD touchscreen on the Raspberry Pi. In this article, I will show you how to adjust the screen rotation of the LCD to landscape mode, and will show you how to calibrate the touchscreen pointer for optimal accuracy. Just follow the steps below to compete the process of setting up your Raspberry Pi LCD touchscreen:

1. First we need to change the setting for screen rotation in the /boot/cmdline.txt file. This setting is called fbtft_device.rotate=X. By default, this is set to X=0, which results in a portrait mode screen orientation. In order to switch the orientation to landscape mode, change fbtft_device.rotate=0 to fbtft_device.rotate=90. Enter sudo nano /boot/cmdline.txt at the command prompt. There should only be one line in this file. Go to the end of it and you will find the fbtft_device.rotate=X setting. Change the value from 0 to 90:

However, if you try to touch the screen now, you will find that the pointer movement does not correspond to your finger movement. This is because the LCD screen driver and the touchscreen controller driver have separate settings for screen rotation. We need to change the rotation of the touchscreen controller driver to match the rotation of the LCD screen driver.

2. You probably noticed that dragging your finger to the right moves the pointer up, not to the right. This indicates that the x and y axes of the touchscreen are swapped. To correct this, we need to swap the x axis for the y axis. This can be done by changing the swap_xy=X parameter in /etc/modules.

Now if you drag your finger around the screen, you will notice that the y axis (up and down) is correctly aligned with the motion of your finger. However, the x axis (left and right) is still inverted. To fix this, we need to install two more kernel modules, xinput and evtest. xinput is a Linux utility that will allow us to configure input device settings for the touchscreen controller, and evtest is an input device event monitor and query tool.

After the Pi finishes rebooting, you should notice that when you move your finger across the touch screen, the pointer should follow correctly in both axes. If you are using the Raspberry Pi 2 Model B, you will need to complete the calibration steps below before the pointer follows your finger correctly (and make sure that you have enabled startx to load automatically – see step 6 in this article).

You can rotate the screen 90 degrees (as we did in this tutorial) and the power connector will be at the bottom of the screen, but you can also rotate it 270 degrees so that the power connector is at the top of the screen. To do this, simply enter fbtft_device.rotate=270 in the /boot/cmdline.txt file. Then change the DISPLAY=:0 xinput --set-prop "ADS7846 Touchscreen" "Evdev Axis Inversion" 0 1 line in the /etc/X11/xinit/xinitrc file to DISPLAY=:0 xinput --set-prop "ADS7846 Touchscreen" "Evdev Axis Inversion" 1 0. All you need to do is switch the values of the 0 and 1 at the end of this line.

Now that we have our LCD touchscreen up and running, the final step in the installation is the calibration of touch control. This will make the pointer much more accurate and easier to use.

2. Now we need to install the calibration tool we will be using, xinput_calibrator; and other filters for controlling the touchscreen response. Install the tslib library by entering aptitude install libts-bin:

3. The calibration tool we will use is called ts_calibrate. We will also be using a program to check the results of the calibration called ts_test. In order to use ts_calibrate and ts_test, we must first set proper environmental variables. Enter export TSLIB_TSDEVICE=/dev/input/event0 into the command prompt, then enter export TSLIB_FBDEVICE=/dev/fb1:

4. Now we can use ts_calibrate. Enter ts_calibrate at the command prompt (make sure you are still in root mode) to run the ts_calibrate program. The program will consecutively display five crosses on different parts of the screen, which you need to touch with as much precision as possible:

This calibration data will be written to a calibration file called /etc/pointercal. To view the contents of this file, enter cat /etc/pointercal at the root command prompt.

Drag the cross around the screen and observe how closely it follows your finger or stylus to test the accuracy of the calibration. Now press the “Draw” button to enter the drawing mode:

This is kind of a long process, but it is well worth it if you want to get the LCD touchscreen set up properly. So if you have any trouble setting this up or have anything to say, please leave a comment below. Also, if you found this article useful, please share it with your friends!

Both MacOS and Windows have built-in calibration tools to help guide you step-by-step through the process, which is particularly helpful if you are new to monitor calibration. These free tools should be the first stop if you’re merely a casual image junkie or working on a tight budget. Keep in mind that the adjustments will be limited by the display type and model, though.

In older versions of Windows, you can find the Color Calibration utility in the Display section of the Control Panel, which is listed under Appearance and Personalization.

Step 2: Now that you are in the calibration tool, follow the on-screen instructions to choose your display’s gamma, brightness, contrast, and color balance settings.

Step 3: Once the calibration wizard is complete, make sure to choose the Current calibration, or return to the previous calibration if you are unsatisfied with the results. The new calibration will be stored as an .ics file, or color calibration file, and will show up as a new International Color Consortium (ICC) Profile in the Color Management settings app.

Step 2: Your Mac’s step-by-step instructions will walk you through the calibration process once you have found and opened the software utility. Just follow the on-screen instructions to choose:

Color adjustments: White point is a given, but Apple will try to detect your display and offer a number of other color calibrations at this point … or it may skip the rest of the adjustment options entirely. Native Apple displays may be more likely to have fewer color calibrations at this point (because Apple already calibrated them).

There are a handful of web-based calibration tools that help you manually adjust your monitor settings. They can provide more precise, or more customized, calibration than the built-in utilities.

W4zt Screen Color Test: This simple webpage provides you with several color gradients and grayscale color boxes you can use for quick comparisons, along with an easy gamma test you can run. It’s nice to have so many tests on one page, making this solution great for fast and dirty calibration so you can move on.

The Lagom LCD Monitor Test Pages: Handy for both online and offline use, the Lagom LCD Monitor Test Pages not only allow you to adjust various things such as contrast and response time, but also allow you to download the images as a 120KB zip file, so you can check any monitor in-store that you are thinking about purchasing.

Calibrize 2.0: If you want a great tool that goes a little more in-depth than native calibration options, we suggest downloading Calibrize 2.0. It’s an excellent free wizard that carefully walks you through well-explained steps to help you calibrate color, grayscale, gamma, and similar settings on your computer.

While they’re better than a more temporary solution, built-in calibration utilities still have one major flaw: You. Since they rely on your specific color perception, what looks great to you might look thoroughly off to a friend.

If you’re looking for a calibration tool, we recommend either the X-Rite ColorMunki Smile ($99) or the Spyder5Elite ($200). Both devices boast a full-spectrum, seven-color sensor that can accurately display a range of standard and wide-gamut displays. If you have a bigger budget, you can look for upscale calibrators that have even more advanced options.

These devices are user-friendly, involving a simple three-step process of fastening the device to your screen, plugging it into a USB port, and opening the calibration software. When the software starts running, you just have to follow the setup procedure. It’s fairly intuitive, but if you have trouble, you can find tutorials online that will walk you through it.

Starting at $180, X-Rite’s i1Display is another solid device. Just like the Spyder series, each of these three options is configured with automated calibration software. The more money you spend, the more additional features and other benefits you’ll get from the device.

@texasEE, this is one of the screen’s i haven’t had a chance to personally calibrate yet. I had a chance to test the 4 and 5 inch, so those have it implemented. For the 7-inch, the values are in the device tree overlay, copied from the 4 and 5 inch displays, just disabled:

While I was cleaning dust from the control panel touch screen, it spontaneously decided to calibrate the touch screen (when swiping over the screen I probably got extremely (un)lucky). Problem is that I can"t find any way to start the touch screen calibration from outside the touch screen control panel and the only way I"ve found to do a factory reset on the damn thing is through the menus in the touch screen.

The touchscreen is totally out of whack, meaning that the locations I press on the touch screen don"t cause a response in the same location in the printer. This means, for example, that to press "Settings" on the printer means pressing somewhere near the center of the touch screen. This also means that some buttons are (or at least, seem) totally inaccessible.

Every MacBook Pro with Liquid Retina XDR display undergoes a state-of-the-art factory display calibration process on the assembly line to ensure the accuracy of the P3 wide color panel and the individual backlight LEDs. In addition, the factory calibration process enables sophisticated built-in algorithms to accurately reproduce a variety of color spaces used by media workflows today, including sRGB, BT.601, BT.709,​ and even P3-ST.2084 (HDR).

The factory display calibration process lets MacBook Pro users enjoy an exceptional viewing experience right out of the box. If your workflow requires custom calibration, you can measure your display, then fine-tune the calibration.

You can use a set of QuickTime movie test patterns from Apple to evaluate the calibration of your Liquid Retina XDR display. These appropriately color-tagged SDR and HDR references allow you to use your in-house spectroradiometer to measure and verify the color primaries/secondaries and luminance, including the electro-optical transfer function (EOTF).

Compare the color (chromaticity) and luminance values you measured to those in the Reference Values.txt file in the test pattern’s folder. Depending on the tolerance or calibration of your spectroradiometer, there may be some variation in readings relative to the reference values.

If your workflow is tuned to a specific target, you can fine-tune the calibration of your display. This lets you adjust the white point and luminance of your display to more precisely match your own in-house display calibration target. Learn more about the different values you can adjust

Apple recommends measuring and calibrating in an environment with ambient temperatures of 77 degrees fahrenheit or cooler. For the most repeatable results, ambient temperatures should be similar during calibration and in typical use.

If you fine-tune the calibration of your display, make sure that when you measure your display, the test pattern matches the reference mode you intend to fine-tune. For example, use the HDR Video (P3–ST 2084) preset when using the HDR10-based patterns.

RouterBOARD 2011U and CCR series devices are equipped with a resistive touchscreen, for quick access to device stats and simple configuration options. Touchscreen requires pressure against the surface to register a touch, therefore light swipes and quick/short taps might not get registered (as opposed to a capacitive touchscreen commonly found on phones). If you find trouble operating the screen with your finger, you can also try a stylus, or opposite end of a pen.

Before the LCD touchscreen can be used, it needs to be calibrated at least once. After the first successful calibration, data is stored on the router. If no calibration values are present, calibration process will start automatically.

Three of the points are used to calculate calibration variables and the 4th point is used to test whether the calibration was successful. If calibration is unsuccessful, calibration variables are not saved.

Take-screenshot function allows to create BMP image of currently displayed LCD screen and saves it in File List with specified name. Screenshots without file name are not saved, screenshots with an existing file name are overwritten.

Interfaces menu provide configuration for interface display timing in Stat Slideshow. Up to 10 additional (non-physical) interfaces can be added to the LCD.

Maximum interface speed that is used to determine bandwidth usage in All interface graphs and Interfaces screens. "auto" value can be set only for physical interfaces.

A Page is an screen that can contain up to 12 interface bar graphs. Sub-menu allows to configure which interfaces are shown in a page. Up to 5 pages can be added to all interface graph screen and up to 12 interfaces per page. To add an interface to a page, it first must be added under /lcd interfaces sub-menu.

PIN code number allows to protect sensitive menus on the LCD screen. The PIN number will be asked if Read-Only mode is disabled and you add an IP address, reset or reboot the router. Default PIN is 1234

Since v6.0, LCD has a menu structure. Menu screens consist of buttons that are used to navigate the menus. A scrollbar is shown on the right side of the screen if it does not fit on the actual display. The screen can be dragged up or down to access more options if they are available. At the top of each menu screen is a "Back" button that jumps to the previous screen.

If the router has default configuration - user named "admin" with no password, then a warning on LCD will appear. This screen shows IP"s assigned to the interfaces which could be used to connect to the router.

Interfaces menu displays all the Ethernet and Wireless interfaces. Bandwidth usage is shown similar to the All interface graph screen. From the Interfaces screen you can choose a specific interface to look at.

If a tap lands into the top right corner of the screen (square box 1/4 of the screen height), info time interval is changed: Min -> Hour -> Daily -> Weekly -> Min...

All interface graph screen shows the RX/TX bandwidth usage about all interfaces. The max values are calculated like this - for Ethernet interfaces it"s the negotiated rate or set speed. For wireless interfaces it"s calculated from used band, channel-width and chain count using the theoretical values. The goal of this screen is to see how values are related to each other for a single interface.

Stat Slideshow screen is similar to the "Stats" screen, but the interfaces are switched after they timeout. Settings for slideshow are stored in RouterOS submenu /lcd interface

These screens are only available when Read-Only mode is disabled. To access any of the screens, the Pin number must be entered. If the Pin authentication is successful, the user must confirm the desired action by pressing the "Yes" button, or cancel by pressing - "No".

Every touchscreen is slightly different so in order to convert a touch position to a pixel position each touchscreen is factory calibrated by SPLat. However time may alter the characteristics of the touchscreen, or the LCD may need to be replaced due to physical damage. As a result, you may find yourself needing to re-calibrate the touchscreen.

This command will stop the SPLat application from running, so make sure the machine under control is in a safe state first. Control won"t return to the SPLat application until either calibration is complete or power is cycled. When your application resumes, you"ll have to fully redraw your screen.

On screen text will guide you through the calibration procedure which involves touching 5 locations (identified with a small dot) on the touch screen, sequentially, with the tip of a mechanical pencil (good because it"s sprung and pointy) or similar.

For the sake of completeness, you may also check to determine if the touchscreen has been calibrated. This will always return TRUE since every HMI430 is factory calibrated.