Advantages and Disadvantages of Each Type of LCD

By Anonymous

LCDs produced by the photoelectric effect are roughly divided into the following types: TN-LCD, STN-LCD, HTN-LCD, FSTN-LCD, and TFT-LCD. Each type of LCD has its own advantages and disadvantages.

LCD Screen

TN-LCD is twisted nematic LCD liquid crystal display.

The LCDs we usually see in electronic watches, calculators, game consoles, etc. are mostly TN-LCD.

STN-LCD is the abbreviation of Super Twist Liquid Crystal Display.

That is, super-twisted nematic LCD. It has a similar structure to TN-LCD, except that its twist angle is not 90 degrees, but between 180 and 270 degrees. Although the twist angle is only different, its working principle is the same as TN-LCD is completely different. STN-LCD is a mid-range product in current LCD production. It has the characteristics of larger display information than TN-LCD. And it mainly applies in various instruments, Chinese display machines, notepads, notebook computers, etc. The manufacturing process of STN-LCD is basically mature. But the main technology is in the hands of a few countries such as Japan and South Korea. There are more than ten STN-LCD manufacturing companies in China.

888 Lcd Screen

HTN-LCD is the abbreviation of Hight Twist NemaTIc Liquid Crystal Display.

That is, highly twisted nematic LCD liquid crystal display, the twist angle of HTN-LCD is between 100 degrees and 120 degrees, which is between TN-LCD and STN-LCD. The number of HTN-LCD is not much at present, and its performance is between TN-LCD and STN-LCD.

FSTN-LCD is the abbreviation of Film Super Twist NemaTIc Liquid Crystal Display.

Here Film refers to compensation film or retardation film. So FSTN-LCD refers to compensation film super twisted nematic LCD liquid crystal display. The disadvantages of STN-LCD can eliminate by a specially treated compensation film.

TFT-LCD is the active matrix LCD of thin film transistors, which is the highest-grade product in the current LCD market.

It is mainly used in notebook computers, LCD TVs, etc. The manufacturing process of TFT-LCD is relatively complicated and the price is relatively high.

There are many types of LCD liquid crystal displays, which can be divide into transmissive and reflective direct-view displays according to the display method.

Fluorescent lamps, electroluminescent electrodes and other light sources install on the back of the transmissive LCD. Therefore, it can also work in dim ambient light.

The reflective type is a kind of aluminum foil light reflection sheet attaching to the outside of the glass substrate on the back of the LCD to reflect the incident light of the LCD for display.

888 Lcd Screen

In TN and STN models, back glass. There are polarizers and corrugated reflectors on the substrate. This reflective type fully utilizes the characteristics of low power consumption of non-luminous LCDs.

Advantages and disadvantages of LCD liquid crystal display

advantage:

(1) LCD has obvious advantages in terms of energy saving.

(2) Its radiation index is generally lower than that of CRT.

(3) Due to its principle, there will not be any geometric distortion and linear distortion.

(4) The liquid crystal display has a large viewing area.

(5) High-definition picture quality (except for some low-priced shrinking displays).

(6) Compared with CRT, the display is several times lighter in weight, and the thickness is also several times thinner, so it is easy to move.

(7) The color of the picture is clear due to insufficient power supply.

shortcoming:

1) The visible deflection angle is small.

2) It is easy to cause image smearing (such as rapid shaking of the mouse pointer). This is because most ordinary LCD screens are 60Hz (displaying 60 frames per second), while CRTs are mostly 85Hz (85 frames per second). However, this problem mainly appears in games when LCD monitors are just popular (that is, “picture tearing”), and has basically solved after that. If it still occurs, “vertical synchronization” can solve it.

3) The brightness and contrast of the LCD are not very good.

4) LCD “bad pixel” problem.

5) Limited lifespan.

6) When the resolution is lower than the default resolution of the monitor, the blurring of the picture will be very obvious. But even if the current resolution of the CRT is lower than 1 times the default resolution, it will not be very obvious.

7) When the resolution is greater than the default resolution of the display (software mandatory setting is required), the color in the details will lost, while the CRT has severe screen flicker and the picture is obviously blurred.

Q: How many different types of LCD divided by the photoelectric effect?

A: LCDs produced by the photoelectric effect can roughly divide into the following types: TN-LCD, STN-LCD, HTN-LCD, FSTN-LCD, and TFT-LCD.

Q: Compared with CRT, what is the advantage of LCD in weight and thickness?

A: LCD is several times lighter in weight, and the thickness is also several times thinner, so it is easy to move.

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