What are the technical parameters of the LCD screen:
1, resolution
Resolution refers to the number of pixels displayed per unit area. The physical resolution of the liquid crystal display is fixed. For the CRT display, as long as the deflection voltage of the electron beam is adjusted, different resolutions can be changed. However, it is much more complicated to implement in a liquid crystal display, and the display effect must be simulated through calculations, and the actual resolution has not changed. Since not all pixels are zoomed in at the same time, there is a zoom error. When the liquid crystal display is used in a non-standard resolution, the text display effect will be worse, and the edges of the text will be blurred.
LCD
2, brightness
The maximum brightness of a liquid crystal display is usually determined by the backlight. Technically, it can achieve high brightness, but this does not mean that the higher the brightness value, the better, because a display with too high brightness may hurt the viewer's eyes. LCD is a substance between solid and liquid. It cannot emit light by itself and requires additional light sources. Therefore, the number of lamps is related to the brightness of the liquid crystal display.
3, contrast
"Contrast" defines the ratio of the maximum brightness value (full white) divided by the minimum brightness value (full black). The control IC, filter and oriented film and other accessories used in LCD manufacturing are related to the contrast of the panel.
4, color degree
The important thing about LCD is, of course, the color expression. We know that any color in nature is composed of three basic colors: red, green, and blue. For example, an LCD panel with a resolution of 1024768 is displayed by 1024768 pixels, and the color of each independent pixel is controlled by three basic colors of red, green, and blue (R, G, B). Most manufacturers produce liquid crystal displays, each basic color (R, G, B) reaches 6 bits, that is, 64 kinds of expression, then each independent pixel has 646464=262144 kinds of colors. There are also many manufacturers that use the so-called FRC (Frame Rate Control) technology to express full-color images in a simulated manner, that is, each basic color (R, G, B) can reach 8 bits, that is, 256 expressions. , Then each independent pixel has as many as 256256256=16777216 colors.
5. Response time
Response time refers to the response speed of the liquid crystal display to the input signal, that is, the response time of the liquid crystal from dark to bright or from bright to dark, usually in milliseconds. Of course, the smaller the value, the better. If the response time is too long, it is possible that the liquid crystal display will have the feeling of trailing shadows when displaying dynamic images.
6. Viewable area
The size indicated on the LCD is consistent with the actual screen range that can be used. For example, a 15.1-inch LCD monitor is approximately equal to the visual range of a 17-inch CRT screen.
7, viewing angle
The viewing angle of the liquid crystal display is symmetrical, but not necessarily symmetrical up and down. For example, when the incident light from the backlight passes through the polarizer, liquid crystal, and alignment film, the output light has specific directional characteristics, that is, most of the light emitted from the screen has a vertical direction. If we look at a completely white picture from a very oblique angle, we may see black or color distortion. Generally speaking, the up and down angle should be less than or equal to the left and right angle. If the viewing angle is 80 degrees to the left and right, it means that the screen image can be clearly seen at the position of 80 degrees from the normal line of the screen. However, because people have different vision ranges, if you don't stand within the best viewing angle, you will see errors in color and brightness.
