What are the components of an LCD monitor?

LCD.

Divided into four large sections:

1.Power supply part: The maintenance of this part is the simplest and most common, the maintenance method is ordinary, and the components are ordinary.

2.High-voltage board: In fact, it is an electronic rectifier, and the trouble is the special step-up transformer and control integrated circuit.

Generally, the power input is 12V direct power supply, another 5V from the motherboard, and a brightness control voltage, some machines have power-saving control, from the CPU, which is a high and low level.

Control. 3.Signal Conversion Board - Motherboard:

There are three main parts, CPU, power conversion, input signal processing integrated circuit, the maintenance method is basically the same as the VCD motherboard (I think), the wearing parts are SMD components - electricity is easy to leakage, the board is easy to leak, etc., and it is rare to have memory.

Data loss, damage to signal processing integrated circuits, etc.

4.The most valuable part of the repair is it - the LCD screen, of course, the most difficult and quite dangerous. The technical requirements for maintenance are very high.

I remember that there was a disassembly of the LCD screen on the Internet, you can go and take a look. Under normal circumstances, if it is a problem such as bright and dark lines, it is recommended that you do not repair it, the risk is too great, and the problem is generally local damage to the driver integrated circuit, poor contact of the connecting cable, etc.

The fault that can be repaired is the white screen (if you have repaired the LCD monitor, you should know that this kind of problem is not the motherboard or the screen), and the success rate is relatively high.

Generally, there are LCD panels (displays), power cables, VGA signal cables, and individual stereo speakers.

A display or screen is an IO device that belongs to a computer, i.e., an input and output device. It is a display tool that displays a certain electronic file on the screen through a specific transmission device and then reflects it to the human eye. It can be divided into various types such as CRT, LCD, etc.

So what are the display components?

1. LCD module. Glass substrate: Inside are liquid crystals and grid-like printed circuits.

Timing control: Used to generate the timing and voltage required to control the deflection of liquid crystal molecules. Lamps:

A white light source is generated. Backlight: Reflects the light produced by the lamp onto the LCD screen.

2. Control board. The control board plays the role of signal conversion. Converts signals from various input formats into signals with fixed output formats.

For example, the input signal to the screen of 1024 x768 can be 768, etc., and finally converted into the output format 1024 768.

3. Inverter. High pressure is generated and is used to light the tube.

The LCD panel is mainly composed of the following eight parts:

1. Backlight (or backlight module):

Since liquid crystal molecules cannot emit light on their own, if you want to appear in a picture, the liquid crystal screen needs a special light source to provide light, and then the liquid crystal molecules are deflected to produce different colors. The role of the backlight is to provide light energy.

2. Two polarizers on the upper and lower layers:

The role of a polarizer is to allow light to pass through in one direction.

3. Two glass substrates on the upper and lower floors:

The glass substrate is not just two pieces of glass, it has a groove structure on the inside and adheres to a alignment film, which allows the liquid crystal molecules to be neatly arranged along the groove. On both sides of the upper and lower layers of glass, TFT thin-film transistors and color filters are attached.

4. ITO transparent conductive layer:

Its role is to provide conductive pathways, which are divided into pixel electrodes (P-class) and common electrodes (M-class).

5. Thin-film transistor (what we often call TFT):

Often said TFT-LCD, it actually refers to this thin film transistor, its role is similar to a switch, TFT can control the signal voltage on the IC control circuit, and transport it to the liquid crystal molecule, determine the angle of deflection of the liquid crystal molecule, so it is a very important component.

6. Liquid crystal molecular layer:

It is the most important element to change the polarization state of light, and its alignment and polarization state are determined by the combination of electricity and elastic forces.

7. Color filter:

The light deflected by the liquid crystal molecules can only display different gray scales, but cannot provide the three primary colors of red, green and blue (RGB), while the color filter is composed of three kinds of RGB filters, and each color and brightness are adjusted by mixing the three. Each pixel in the LCD panel is composed of three dots: red, green, and blue, and each color dot has a different grayscale variation.

8. a frame glue; It is to make the upper and lower layers of glass substrates in the LCD panel firmly glued together, and the entire internal system is "isolated" from the external connection to prevent dust from entering and affecting the color effect.

First, the main composition of the LED display (taking the more complex synchronous full-color screen as an example).

1. The metal structure frame is used to form an inner frame, which is equipped with various circuit boards such as display unit boards or modules and switching power supplies.

2. Display unit: It is the main part of the LED display, which is composed of LED lights and driving circuits. The indoor screen is the unit display board of various specifications, and the outdoor screen is the module box.

3. Scanning control board: The function of the circuit board is data buffering, generating various scanning signals and duty cycle grayscale control signals.

4. Switching power supply: turn 220V AC into various direct current and provide it to various circuits.

5. Transmission cable: The display data and various control signals generated by the main controller are transmitted to the screen by twisted pair cables.

7. Special graphics card and multi-** card: In addition to the basic functions of computer graphics card, it also outputs digital RGB signals and line, field, blanking and other signals to the main controller at the same time. In addition to the above functions, the input analog video signal can also be converted into a digital RGB signal (i.e., ** acquisition).

8. Computers and their peripherals.

Hello dear, I am honored to answer your questions, it will take a little time to sort out the answers, please be patient

Dear, I'm glad to answer for you! The basic composition of the led display is 1Screen, 2

Fixed mounting structure, 3Control system, 4Data Transmission System, 5

Cooling system. Hope!

Dear, do you have any other questions? I can continue to answer for you You and your family should do a good job of personal protection during the epidemic!

The structure of the liquid crystal display mainly includes:

1 light guide plate. The main material is optical acrylic PMMA plate, and its chemical name is methyl methacrylate;

2. a polarizer. The main structure of polarizer is surface protective film, protective layer, polarizing matrix, adhesive layer and separation film;

3. Transparent protective layer. The material is acrylic resin;

4. Glass substrate. It is composed of calcium and sodium glass polished and coated;

5. Black matrix. According to the type of material, it can be divided into metal shading layer and black resin shading layer BM type;

6. Color filter layer. This structure belongs to the pigment dispersion type of stereotype;

7. ITO conductive film. The structure is indium tin oxide;

8. Transparent protective layer. The structural material is an acrylic resin;

9. Alignment membrane. For the composition of the aligned film cured by heating polymerization, it is polyimide.

Liquid crystal module glass substrate: Inside is a liquid crystal and a grid-like printed circuit timing control: used to generate a timing and voltage lamp that controls the sequence of liquid crystal molecule deflection

Produces a white light backlight: reflects the light produced by the lamp onto the LCD screen2. The control board plays the role of signal conversion.

Converts signals from various input formats into signals with fixed output formats. For example, for a 1024x768 screen: the input signal can be 640x480; 800x600;1024x768...

Finally converted to an output format. The inverter generates high voltage and is used to light the tube. Note that it creates high pressure!!

Introduction to the internal structure and principle of LCD monitor,It is the basis for learning LCD TV,It is recommended to take a look。