lcd panel brightness in stock

For the video display developer LCD panels are available in many sizes and resolutions, they are also available with many choices of maximum brightness. The following considers the topic of LCD panel brightness, the choices, the methods for adjusting brightness and some brightness adjustment scenarios.

LCD panels are generally rated as to their maximum brightness level which is expressed in Nits, it is equal to Candela/sqm (cd/m2), and this will be at a particular color temperature as noted in the specification, usually 10,000 K. In terms of a practical understanding, the following is a rough guide:

Outdoor displays range from a low end of 700 nits to typically 1,000 or 1,500nits and up with 2,000~2,500nits and even up to 5,000nits seen with some models. This may include standard LCD panels, custom LCD panels as well as custom cut LCD panels.

Virtually all LCD panels have a LED backlight these days, these are powered by an LED driver board. Brightness control via the driver board will be by one of two methods:

PWM (Pulse Width Modulation): This varies the duty cycle of the backlight “on time” – it is predominant in modern LCD panel LED backlight designs to enable support for digital brightness controls.

Analog: Uses a simple variable voltage to adjust brightness, for example this might be a dial or slider type potentiometer / variable resistor. To see how to enable analog backlight adjustment visit: https://www.digitalview.com/blog/brightness-adjustment/

One of the advantages of LED for the backlight is the range of adjustment that is possible, however it is important to note that the range varies significantly from model to model. Some industrial panels can be turned to very low light levels making them suitable for use in special environments such as at night. Lower cost panels limit the range of brightness to what might be required for typical usage, whereas panels with full range dimming from full off to full on require more complex backlight drivers.

Backlight lifetime: Many LCD panels have a backlight lifetime rating of 50,000 hours (typically measured to half brightness), this can be extended by running the LED backlight at a lower brightness level. Some panels may only offer 30,000 hours as a lower cost solution while other panels may offer up to 100,000 hours for high end applications.

An LCD panel backlight may be constructed so the LED’s are mounted directly behind a light guide diffuser, or they may be mounted along one or more edges of the light guide.

Active backlight: This is a function of some LCD panel backlights to automatically adjust the backlight brightness in response to the image. For more advanced systems there is an LED array making up the LED backlight, this adjusts the brightness in areas localized to the image being shown. This can greatly enhance the brightness across the display and is being used primarily with video, for example on consumer TV sets. It is not useful to all image types, for example a spreadsheet or content like maps or data is not likely to benefit.

Local dimming: Some LCD panels with direct LED may support local dimming so the LED’s are dimmed in response to the image close to them. This will not be at the same resolution as the LCD panel itself but will help greater contrast over the display by enhancing the brightness in bright areas of the image and darkening the image in dark parts of the image.

For the LCD monitor manufacturer it is important to consider that any covering over the LCD panel will reduce the brightness. For example the protective glass over a digital signage display, or a touch screen, or a semi-silvered mirror. So if a specific brightness is required the measurement should be taken with these in place.

There are various relatively low cost brightness meters available, typically in the couple of hundred dollars range. It is difficult to comment on the accuracy of these but we have found them to be within 5% of each other, though more importantly they do appear to be quite consistent in measurement so good for measurement comparisons. For more accurate measurement there are light meters from companies such as Minolta that can be calibrated, the cost may run into several thousand dollars.

Examples of light meters costing a few hundred dollars include SpyderX by Datacolor (needs a PC), a handheld meter is the SM208 by Sanpometer (search SM208 meter). Note: Many light meters, including smartphone apps, will be meters used for photography and not give readings in nits (or candelas). LCD panel specifications are typically measured using nits.

PWM and Analog: Most Digital View LCD controllers support PWM and Analog as a method for adjusting the backlight brightness level (this is noted in the column headed “Other” on the controller board summary table: https://www.digitalview.com/controllers/lcd-controllers-home.html. Also see https://www.digitalview.com/blog/brightness-adjustment/ for a guide to using a dial or slider type variable resistor to adjust the backlight.

Ambient light sensor: The backlight is adjusted for brightness or powered off depending on ambient light conditions. This uses a light sensor attached to the LCD controller board, see https://www.digitalview.com/blog/light-sensor-app-note/ for more details.

The specifics of the backlight control are documented separately for each LCD controller model (product summary here) in the product manual available for download on the product page.

Note: There are two ways to adjust the perceived brightness of a LCD panel or LCD monitor, the backlight and the black-level. Very often, particularly in the past, the monitor brightness setting adjusted the black-level, this adjusts the LCD but not the backlight.

Color, color temperature etc: In addition to adjusting the brightness other settings may be adjusted as well. For example the color temperature or for example a switch to green monochrome for night vision.

Night-safe lighting (update) : Dual-rail backlights can also be supported. These special backlight enable normal brightness and extreme low level brightness with custom night-safe lighting. Contact us for details.

Note: We have a blog on methods for implementing an ambient light sensor with Digital View LCD controller boards to automatically adjust the backlight or system power, see: Ambient Light Sensor

Update March 2019: Most of the above remains unchanged except for the increased availability of high bright LCD panels of around the 1,000 nit to 2,500 nit range. AUO for example has a number of large size LCD panels with 1,500 nit brightness for the digital signage market. Tianma has panels under 20″ with 1,000 nit to 1,500 nit brightness for various outdoor applications.

The other change is that high bright panels are now increasing edge-lit, this makes the panels thinner and these panels tend to use less power than the previous models. One of the benefits for monitor designers is easier heat management and reduced overall display system costs.

Features 4 wire resistive touch panel HDMI/DVI input Touch screen control With VGA input, connecting directly to PC, as a Personal Computer With AV input, connecting directly to DVD player, as a car entertainment system With touch screen operation, can as a display terminal unit of industrial equipment Specifications Panel Size: 8" TFT LCD Backup Camera Wiring is Exposed Resolution: 800 x 480, up to 1,920 x 1,080 pixels Touch Panel: 4-wire resistive Brightness: 250cd/O Contrast: 300:1 Viewing Angle: 130/120(H/V) Input Voltage: DC 12V Input Signal: PC(VGA), AV1, AV2, HDMI, DVI Power Consumption: 8W Audio Output: 1W Size(LWD): 211 x 136 x 31mm Weight: 560g Viewable area is 176.64(W)X99.36(H) mm. This is an application for full HD Video Camera in CCTV monitoring and making movies. This product employs new integrate circuits and high quality TFT LCD modules. It is putting out with its low power consumption, emits no radiation, and other advantage characteristics. This product is shaped with modern style and is easy to be carried with. The color TFT LCD is the most suitable display for VGA, VCD, DVD and GPS system for motorcars and ships. It also can be used in the office, in flat, at home also in other suitable position. With the bottom support bracket, you can view the monitor under different angles. Sure the LILLIPUT monitor will help you seizing much more clear world. Package Includes: Brand new 8"" LILLIPUT Color TFT LCD Monitor 1piece Bracket 1piece Remote control 1piece Home DC adapter 1piece Car power cord (CE) 1piece 14 PIN SKS 1piece VGA cable (MD connect HDB 15pin VGA cable) 1piece HDMI connect HDMI cable 1piece HDMI connect DVI cable 1piece Manual 1 copy

It can be made into window facing lcd monitor,then it can be installed behind of window in Store,coffee shop,restaurant,hotel. can attract more customers go inside.

It also can be made into outdoor waterproof lcd monitor or outdoor lcd kiosk,then it can installed in street, bus stop, in park,outside of mall.It is visible under strong sunlight.

Before shipment,we will do Aging test at least 48hours to insure our high quality.That"s why our high brightness lcd panel can continute to work nomally for 24hours/7days.

The subject of a previous blog post is how to choose the best screen size. However, a second factor you should consider is the screen"s brightness, which can significantly influence the screen"s price and running costs. This article will explain what brightness is and what things you should consider in choosing a screen and includes a table of what screen brightness to best use in typical digital signage environments.

To understand the rest of this article and most screen vendor documentation, it is necessary to briefly define what we mean by "brightness" and "illuminance":

Brightness (also called luminance) is a measure of how much light is reflected or emitted from an object (screen), it is expressed/measured in "nits" (which is the same as cd/m2)

In short, brightness is the measure of light coming from a screen, and illuminance is the measure of light in a space. So, it makes sense that for content on a screen to be visible, it has to be brighter than the objects around it (which are illuminated by the ambient light).

The "correct" brightness of a screen is "enough to make the content of the screen overcome the brightness of its direct surroundings". Which, in its turn, depends on the illuminance of the screen"s location. When the illuminance around the screen varies, the maximum illuminance is considered. On the other hand, the brightness should not be too high; a screen that is too bright will be unpleasant to look at, unnecessarily expensive, and negatively influence the surrounding lighting indoors.

Since brighter screens have a higher purchase price, use more electricity, and, depending on the screen technology, need to be replaced more frequently, it makes sense to use a screen with just enough brightness for its location. In addition, some professional screens have a light sensor allowing them to adjust the brightness to the illuminance of the environment. Adaptive brightness ensures good visibility at the lowest energy use and can be valuable for screens in locations with variable lighting conditions.

for indoor screens; a brightness of at least 300 nits and double the illuminance - so if the illuminance in a room is 200 lux the brightness of the screen should be 400 nits.

The 2-to-1 rule holds for outdoor screens, but a maximum of 3000 nits is enough in most situations. Factor 2 can be adjusted down in cases with higher illuminance to 1,5. Since most outdoor conditions have an illuminance of 1000 lux a minimum brightness for outdoor screens is around 2000 nits, which rules out consumer TV screens. When using outdoor screens at night, they should not be brighter than 100-150 nits

Digital signage screens are available in several technologies; LCD, OLED and LED to name a few. There are some pros and cons to each of these technologies. Concerning screen brightness, there are a few things that you should take into consideration concerning these technologies:

Placing a screen behind a shopping window takes special care. A bright screen will probably solve visibility issues, but it is more expensive to purchase and use electricity. Placing the screen close to the glass and ensuring the surrounding light is adjusted can eliminate the need for high-brightness screens.

To support your decision-making, we include a table of typical ambient illuminance and the recommended screen brightness for that environment. Using this table, you will get more detailed advice than the "rule of thumb" explained above.

IndustryWorkspaceTypical ambient illuminance (in lux or lm/m2)Recommended screen brightness (in nits or cd/m2)Aviation and TransportationAirport departure hall350 – 5,000700 – 2,500

Select the Networkicon on the right side of the taskbar, and then move the Brightnessslider to adjust the brightness. (If the slider isn"t there, see the Notes section below.)

Some PCs can let Windows automatically adjust screen brightness based on the current lighting conditions. To find out if your PC supports this, select  Settings >System>Display. Select Brightness, look for theChange brightness automatically when lighting changes check box, and then select it to use this feature. This automatic setting helps make sure your screen is readable wherever you go. Even if you use it, you can still move theBrightness slider to fine-tune the brightness level for a built-in display.

You might also see another check box displayed: Help improve battery by optimizing the content shown and brightness. Some Windows PCs can automatically adjust the screen brightness and contrast based on content that’s displayed on your built-in screen. For more info, see Adaptive brightness and contrast in Windows.

You might not see the Brightness slider on desktop PCs that have an external monitor. To change the brightness on an external monitor, use the buttons on it.

Intel Display Power Saving Technology (DSPT) is a power-saving feature in Intel’s latest version of mobile graphics chips. These graphics chips reducing power consumption on the computer by altering the brightness and contrast of the display.

Intel DPST controls the LCD backlight, by reducing the backlight as needed they can save power. This can be important on mobile computers running off the battery. The aim is to automatically reduce the backlight brightness while maintaining good visuals on-screen. It analyzes the image to be shown, and it uses equations to change the chroma value and reduce the brightness of the backlight simultaneously. This means you should not see any distortion to the image on-screen. Intel says that 70% of the power that the backlight uses when watching media is saved.

Nowadays, LCD is going to replace the market of LED since LCD is more suitable for people to touch and use it in person ,you can find it everywhere,market,park, campus,etc .

Intel Display Power Saving Technology (DSPT) is a power-saving feature in Intel’s latest version of mobile graphics chips. These graphics chips reducing power consumption on the computer by altering the brightness and contrast of the display.

Intel DPST controls the LCD backlight, by reducing the backlight as needed they can save power. This can be important on mobile computers running off the battery. The aim is to automatically reduce the backlight brightness while maintaining good visuals on-screen. It analyzes the image to be shown, and it uses equations to change the chroma value and reduce the brightness of the backlight simultaneously. This means you should not see any distortion to the image on-screen. Intel says that 70% of the power that the backlight uses when watching media is saved.

On iPad, you can make your screen dimmer or brighter (dimming the screen extends battery life). You can also adjust the screen color and brightness manually or automatically with Dark Mode, True Tone, and Night Shift.

If this setting does not appear, we recommend contacting Microsoft Support or your system manufacturer for information on how to disable the Adaptive Brightness. Adaptive Brightness is a setting provided by Windows that  uses an ambient light sensor in the system to automatically adjust a display"s brightness to the surroundings.

"Lower Brightness" application helps you reduce brightness to any level. You can set brightness level from 0% to 100% by just opening the application and choose brightness level you want.