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The LCD is not luminous, need to use additional light source to create the display ability , The more light source will help to bring brighter LCD screen. Therefore, the backlight source determines the brightness of the screen.

What is the high brightness LCD screen?

The high brightness screen is an LCD screen with higher brightness than ordinary LCD screens. The brightness of a general indoor LCD screen is 200-400cd/㎡, and it cannot be seen clearly indoors or outdoors with sufficient light; while the brightness of an indoor high brightness LCD display is average All are above 500cd/㎡, and the LCD screen dedicated to outdoors can reach above 2000cd/㎡, and the display effect is still excellent in places with strong outdoor light.

The meaning of each parameter of display

Resolution

Size

The size of the display is actually the diagonal length of its display part, in inches (1 inch = 2.54cm). In the case of the same aspect ratio, the actual area is in a square ratio to the diagonal length.

Response time

The corresponding time marked by today’s display is the grayscale response time. The response time of the display is generally in milliseconds (ms), which refers to the response speed of the liquid crystal display to the input signal. The liquid crystal particles turn from dark to bright or from bright to dark. The response time is the two parts of “rising time” and “falling time”, and the response time usually mentioned refers to the sum of the two. The shorter the response time, the less smear phenomenon will appear on the instantaneously moving screen, and the higher the precision of the screen definition will be.

Contrast

The improvement of the contrast makes the picture more layered, and the distinction between light and dark is obvious, which means that it is easier for users to see the picture under the dark conditions of the scene. Generally speaking, a contrast ratio of 200 can provide a good display effect, but some manufacturers pursue high contrast by blindly increasing the brightness. In fact, it does not help, and on the contrary, it reduces the service life. Some manufacturers claim that the dynamic contrast ratio , the effect in actual use is not very obvious.

Brightness

The unit of screen brightness is cd/㎡, and usually the brightness reaches 300cd/㎡, which is enough for daily use. A high-brightness display may be clearer when displaying some dark scenes, but it will be too bright when displaying normal and bright scenes, which is more irritating to the eyes, and the eyes are more prone to fatigue after long-term use. The higher the resolution of the display, the darker the brightness should be adjusted.

Color (color depth)

Each pixel of the display is composed of display units responsible for the three primary colors of RGB (red, green, blue), and their light and dark combinations form the color presented by this pixel. The number of colors used by the display is marked in bits, which is actually the number of light and dark changes that each display unit can display, and the unit of bit represents how many times 2, for example, 8bit color is 2 to the 8th power, each There are 256 changes in the display unit, and the color combination presented by a single pixel is 256×256×256=16 777 216, basically reaching the visual limit of ordinary people.

Color gamut

In layman’s terms, the color gamut of a display is how many colors it can display, which is mainly related to the accuracy of the control chip and display unit. The so-called “wide color gamut” display means that the display accuracy is very high, and it can show more The color has a wider coverage of the entire color range. At present, the common display color gamut standards are mainly sRGB and Adobe RGB, and there is also AppleRGB developed by Apple. sRGB is fully sufficient for general users.