Have you ever cared about the brightness of the LCD screen? How to achieve outdoor high-brightness LCD screen, visible in multiple scenes under the sun
Have you ever cared about the screen brightness parameter? At present, the brightness of most monitors on the market is basically between 300 and 400 nits, and even some monitors with high cost performance have a brightness of less than 300 nits. So what kind of brightness performance can be called good?
1）. What is brightness
- What is brightness?
Brightness refers to the brightness of the picture, and the unit is candela per square meter (cd/㎡) or nits. Candela per square meter (cd/㎡) or nits means candlelight brightness per square meter, that is, the light intensity per unit area.
Liquid crystal itself does not emit light, so all LCD monitors need backlighting, and the brightness of the backlight determines the brightness of the monitor. The brightness value of TFT-LCD is generally in the range of 200 to 350cd/㎡.
The higher the brightness, the better. The higher the brightness, the more uncomfortable it often makes people feel. On the one hand, it is easy to cause visual fatigue, and at the same time, it also reduces the contrast between pure white and pure black, affecting the performance of color scale and gray scale. Therefore, while increasing the brightness, the contrast must also be increased, otherwise the entire display will appear whitish.
- So what kind of brightness performance can be called good?
To answer this question, we must first know one thing, what are the benefits of high display brightness, and what experience can increasing the brightness bring to users? Generally speaking, the main reason for increasing the brightness of the display is to allow users to get better HDR performance.
- What is HDR?
“HDR” is the abbreviation of “High Dynamic Range” in English, which means “high dynamic range display” in Chinese, compared to the SDR Standard Dynamic Range standard dynamic range. “Dynamic range” refers to the number of gray levels between the “brightest point” and the “darkest point” in the image. The larger the dynamic range, the larger the brightness and contrast range in the image. “HDR” is simply a processing technology that improves the brightness and contrast range of the image.
Brightness directly determines the dynamic range of HDR. The higher the brightness, the larger the dynamic range of the display device, and the better the HDR effect may be. How much brightness can be considered a high-brightness LCD screen?
High-brightness LCD screens generally refer to LCD screens with a brightness greater than 600nit, which are visible in sunlight and suitable for outdoor scenes.
Sunlight-readable LCD screens are designed to work in direct sunlight or strong light environments, and are also called daylight-visible LCD screens or outdoor LCD screens. Different technologies can be used to make LCD screens readable under strong light conditions.
2）Concept of LCD outdoor high-brightness LCD screens
As the name suggests, the brightness of outdoor high-brightness LCD screens is much brighter than that of standard LCD screens. The brightness of ordinary LCD screens ranges from 100 to 500 nits, and they will not be displayed clearly when used outdoors.
And our outdoor high-brightness screens can be used directly in bright sunlight outdoors. Even if the sunlight is dazzling, we can clearly observe the picture on the screen, and the color is not distorted.
How does the outdoor high-brightness screen achieve this high-brightness function?
The principle is to increase the brightness of the backlight source by enhancing the LED backlight of the LCD module, so that it is equivalent to or even higher than the brightness of natural light outdoors, thereby achieving high-definition display outdoors. Usually the ideal sunlight-readable brightness is 800 to 1000 nits, or even higher. Of course, the brightness of the screen is not the higher the better, and the use environment requirements and the control of the use cost should also be considered comprehensively.
3)Common application scenarios of high-brightness LCD screens
- Outdoor billboards
Used to display advertisements, promotional information and brand publicity, ensuring that they can still attract attention in strong outdoor sunlight.
- Car entertainment system
Used in the entertainment system and on-board display of the car, providing clear images and information, ensuring that they are still visible under different lighting conditions.
- Remote control display
The display screen used on the drone remote control provides real-time video transmission, navigation information and flight parameters. During outdoor flight, the high-brightness screen ensures that the operator can still clearly monitor the flight status under strong light.
- Industrial and field work
In some industries that need to work outdoors or in the field, tablets with high-brightness screens can be used as mobile workstations to provide a clear work interface.
High brightness This is the most significant advantage of outdoor high-brightness displays. It can still have good visibility outdoors or in strong light environments, maintain a clear display effect, and ensure that information can be effectively conveyed under any light conditions. And it has a very wide brightness display range, which is adjusted according to the changes in outdoor light
Today we have collected several high-brightness lcd display for you:
G057QN01 V2, 5.7 inch, resolution 320*240, brightness 800nits
G065VN01 V221,6.5 inch, resolution 640*480, brightness 800nits
G101EVN03.1，10.1 inch, resolution 1280*800, brightness 1000nits
G121EAN01.2, 12.1 inch, resolution 1280*800,brightness 1000nits
And some small oled displays with very high brightness.
