What exactly is the direction of development of LCD specifications

The future is definitely a 16:9 widescreen direction. That's for sure.

But for now. A widescreen of 16:10 is the best fit.

Now when you buy a machine, you are buying a widescreen monitor. Whether it's the web, movies, or games, it's all moving in this direction. If there are still ** unpleasant to watch with a wide screen.

Then this ** has no meaning to exist. Let's be honest. For example, widescreen is now supported.

Brightness: The brightness of the display is generally measured in cd m2 (lumens per square meter), the higher the brightness, the stronger the anti-interference ability of the display to the surrounding environment, and the brighter the display effect. This parameter should be at least 200cd m2, preferably above 250cd m2.

The brightness of the CRT display is higher, the greater its radiation, and the brightness of the LCD display is obtained by the backlight of the fluorescent tube, so there is no negative impact on the human body (a small amount).

Contrast: Contrast refers to the ratio of the brightness of the bright area to the dark area of the display under the specified lighting conditions and observation conditions. Contrast is a parameter that directly reflects whether the LCD can reflect rich color levels, the higher the contrast, the better the restored picture layering.

At present, the nominal name of LCD is 250 1 or 300 1, and high-end products are 400 1 or 500 1.

Viewing angle: The LCD is a backlight display device, and the light emitted by it is provided by the backlight behind the LCD module, which will inevitably lead to the LCD display having only one best viewing angle ——— face up. When you look at it from a different angle**, the color will be distorted because the backlight can penetrate the pixels next to it and enter the human eye, and the range of non-distortion is the viewing angle of the LCD.

The viewing angle of the LCD display is also divided into horizontal viewing angle and vertical viewing angle, and the horizontal viewing angle is generally greater than the vertical viewing angle. At present, as long as the horizontal viewing angle reaches 120 degrees, it can meet the application needs of most users.

Response time: Response time refers to the reaction speed of the LCD display to the input signal, that is, the reaction time of the liquid crystal from dark to bright or from bright to dark. Generally speaking, it is divided into two parts:

TR (rise time), TF (fall time), and what we mean by response time refers to the sum of the two, the smaller the response time, the better, if it exceeds 40 milliseconds, there will be a lag phenomenon of the image. At present, the standard response time of LCD displays is mostly around 25 milliseconds, but there are a few models that can reach 16 milliseconds.

PS, the contrast must work with the brightness to produce the best display.

Common liquid crystal displays are divided into four types according to their physical structure:

1. Twisted nematic type: referred to as TN, the simple structure of TN liquid crystal display includes a polarizer in the vertical and horizontal directions, a directional film with fine grain grooves, a liquid crystal material and a conductive glass substrate. Widely used in entry-level and mid-range panels, it is not outstanding in performance indicators, cannot express 16.7m color, and the viewing angle has a natural problem;

2. Super twisted nematic: referred to as STN, the display principle is similar to TN. However, the liquid crystal molecule with the TN torsional nematic field effect rotates the incident light by 90 degrees, while the STN super-torsional nematic field effect rotates the incident light by 180 to 270 degrees.

3. Double-layer super-twisted nematic type: referred to as DSTN, DSTN is to scan the twisted nematic LCD screen by double scanning, so as to achieve the purpose of display. DSTN is developed from the super-twisted nematic display STN.

DSTN adopts dual scanning technology, and the display effect is greatly improved compared with STN.

4. Thin film transistor type: referred to as TFT, which is mainly composed of: fluorescent tube, light guide plate, polarizer plate, light filter plate, glass substrate, alignment film, liquid crystal material, thin mode transistor, etc.

The display is different.

The viewing angle of the LCD monitor is symmetrical from left to right, while the upper and lower levels are not necessarily symmetrical. When the incident light from the backlight passes through the polarizer, liquid crystal, and orientation film, the output light has a specific directional characteristic, that is, most of the light emitted from the screen has a vertical direction. If you look at a completely white picture from a very oblique angle, you may see blacks or distorted colors.

Due to the different range of human vision, if you do not stand in the best viewing angle, you will see errors in color and brightness.