What do you need to pay special attention to when buying a segment LCD screen?

There is no light leakage, followed by dark spots, and at the same time look at the screen for scratches. When purchasing a segment LCD screen, the following three basic elements must be considered: 1

Brightness: The higher the brightness value of the LCD screen, the brighter the displayed picture will be, and there will be no blurry. The basic unit of brightness is cd m2, which is candlelight per square meter.

Low-end LCD brightness values can be as low as about 150 cd m2, while high-end displays can be as high as 250 cd m2. 2.Contrast:

The higher the contrast of the LCD screen, the corresponding colors will be more vivid and saturated, and it will also show a three-dimensional effect. On the contrary, if the contrast of the LCD screen is lower, the color will be monotonous, and the image will be correspondingly ordinary. The difference in contrast values is also very large, with a low of 100:

1, the highest can reach 600:1, or even higher. 3.

Viewing range: To put it simply, the viewing range refers to the range that can be seen clearly in front of the screen. If the viewing range is larger, we can naturally look more relaxed; Conversely, if the viewing range is smaller, then as long as we move the position slightly at the time, then the picture we see may not be clear.

The algorithm of the visual range is a clear angle range from the middle of the picture to the four directions of the top, bottom, left, and right of the picture. The larger the value of this angular range, the wider the range will naturally be, but the range of these four directions is not necessarily symmetrical. Therefore, when we purchase segment code LCD, we must choose high brightness, high contrast and wide visual range segment code LCD screen customization, <>

Segment LCD is generally customized, just check the drawings for no errors.

The first point is the lack of empty luggage, the segment code LCD screen has low power consumption, and it is common to use the program to control the backlight, so that we can see the displayed content, which consumes up to 1 3mA current, however, we only need a small button battery to make him work for a few years, such as the display screen on the calculator.

The second point is that the loss of the segment code LCD screen is low, and some manufacturers give the lowest price of a few cents, is it very cheap.

The third point is that the metal discipline of the segment LCD screen is firmly welded, so that we do not have to worry about a series of problems that cannot be lost.

Fourth, we know that among the screens that are usually used, such as an air conditioner remote control, it can last for five or six years, so it can be seen that the segment LCD screen has a long time of use! Generally, the segment LCD screen will not be broken if it is used to 5 to 10 grandmothers, and the equipment is often broken, and the LCD screen will not have any problems, of course, artificially caused falls are inevitable, which can be ignored.

Fifth, the requirements for the main control are relatively low, and the general eight-bit single-chip microcomputer MCU is fine.

Sixth, generally in automobiles, electric vehicles on the segment code LCD screen is a color segment screen, and the color is gorgeous, can display a variety of colors, and the color difference effect is good, so that we have a better appreciation effect for a single color.

Most of them are well written, but there are typos, "broken code LCD screen" is changed to "segment code LCD screen", "broken code" generally refers to the last few pieces of shoes and clothes sold left, "segment code" refers to the segmentation of the LCD screen, all of which are controlled and displayed by paragraph by paragraph, vonen

Advantages: 1) LCD has obvious advantages in energy saving. (2) Its radiation index is generally lower than that of CRT.

3) Due to its principle, there will be no geometric distortion and linear distortion. (4) The LCD display has a large viewing area. (5) High-definition image quality (except for some low-cost shrinkage displays).

6) The display is several times lighter than that of CRT, and the thickness is also several times thinner, so it is easy to move. (7) It will not cause the color distortion of the picture due to insufficient power supply.

Disadvantages: Disadvantage 1: The visual deflection angle is small.

Disadvantage 2: It is easy to produce image smearing (such as the rapid shaking of the mouse pointer), which is due to the fact that ordinary LCD screens are mostly 60Hz (60 frames per second), while CRT is mostly 85Hz (85 frames per second). However, this problem mainly appeared in games when LCD was first popular (i.e., "screen tearing"), and has been largely fixed since then, and can still be exploited if it still appears"Vertical synchronization"Settle.

Disadvantage three: The brightness and contrast of the LCD display are not very good. Disadvantage four:

LCD "dead pixel" problem. Disadvantage five: limited lifespan.

Disadvantage 6: When the resolution is lower than the default resolution of the monitor, the blur will be very obvious, and the CRT will not be very obvious even if the current resolution is lower than 1 times the default. Disadvantage seven:

When the resolution is larger than the default resolution of the monitor (which needs to be set by software), the color in the details will be lost, and the CRT is that the screen flickers badly and the picture is obviously blurry.

Classification of segment code LCD screens.

1. TN type.

2. HTN type.

3. STN type.

4. FSTN type.

What do you need to pay special attention to when buying a segment LCD screen?

1. Brightness. The higher the brightness value of the LCD screen, the brighter the display will be, and there will be no blurry.

The most basic unit of brightness is cd m2, which is the candlelight per square meter. Some low-end LCD brightness values can be as low as about 150 cd m2, while some high-end displays can also be as high as 250 cd m2.

2. Contrast.

The higher the contrast of the LCD screen, the corresponding colors will be more vivid and saturated, and at the same time, it will also show a three-dimensional effect.

On the contrary, if the contrast of the LCD screen is lower, the color will be more monotonous, and the image will be correspondingly ordinary.

The difference in contrast values can also be very large, ranging from 100:1 for low values to 600:1 for high ones, or even higher.

3. Visual range.

To put it simply, the visual range refers to the range of vertical branches that can be seen clearly in front of the screen.

If the viewing range is larger, then we can look more relaxed; On the other hand, if the viewing range is smaller, then as long as we move the position slightly during the image, the picture we see may not be very clear.

The algorithm of the visual range is a clear angle range from the middle of the picture to the four directions of the top, bottom, left, and right of the picture. The larger the angular range, the wider the range, but the range in these four directions is not necessarily symmetrical.

* Instruments, meters: gas meters, water meters, bus systems, fuel dispenser counting * display screen Office equipment: fax machine, punch card machine, attendance machine, access control system * Communication equipment: all kinds of IC cards**, network**, IP*** banking system: POS machine.

Tax system: tax controller.

Medical equipment: physiological monitors and various health care equipment.

Industrial control equipment: automatic control.

Various human-machine interfaces, handheld devices, etc.

It is used for display patterns, numbers, etc., and is widely used in meters, small household appliances and other fields.

Segment code LCD screen, is the 60s of the last century Yuyin mainstream display products Lao Chong, the first developed in Japan, to provide a simple dismantling and fast display effect, fast response, high contrast, low cost.

Segment LCD or segment LCD screen is one of the liquid crystal products, but in the LCD industry, it is generally called pattern LCD screen, pen segment LCD screen, monochrome LCD screen and so on. It is used to distinguish it from dot matrix LCD screens, so segment code LCD is not a strict expression or classification.