Hifly Zhixian Comprehensive Analysis: LCD Display Production Process

source:HiFLYZX read:2 time:2024-01-08 11:35:21 tag: LCD display TFT screen LCD screen manufacturer

  LCD (Liquid Crystal Display) displays are widely used in televisions, computer monitors, smartphones, tablets and other electronic devices. Its high resolution, color accuracy and low power consumption make it a key component of modern technology. This article will delve into the manufacturing process of LCD displays, reveal its detailed process, and help readers better understand the behind-the-scenes of this important technology.

 LCD display

  1. Glass substrate preparation

  The first step in manufacturing an LCD display is to prepare the glass substrate. These substrates are usually very thin and strong, as they will be the carriers of the liquid crystal molecules and carry the structure of the entire display. The process of manufacturing a substrate includes the following steps:

  1. Substrate selection: Choose high-quality flat glass, usually silicon substrate or glass substrate.

  2. Cleaning and polishing: Clean the substrate and mechanically polish it to ensure surface smoothness.

  3. Chemical treatment: Chemical treatment is performed on the surface of the substrate to enhance the adhesion of liquid crystal molecules.

  4. Growing a substrate: Sometimes it is necessary to grow a thin film on a substrate to improve specific properties, such as conductivity.

  2. Coating and cutting

  Once the glass substrate is ready, coating and cutting operations occur. These steps include:

  1. Transparent electrode coating: Coating a transparent conductive layer on the substrate, usually using indium tin oxide (ITO) material. This layer will become the electric field controller for the liquid crystal molecules.

  2. Liquid crystal layer coating: The liquid crystal material is evenly coated on the transparent electrode, and the arrangement of the liquid crystal molecules will be controlled by the electric field.

  3. Cutting of glass substrate: Cut a large glass substrate coated with liquid crystal material into an appropriate size, usually the pixel size of the display screen.

  3. Arrangement of liquid crystal molecules

  The arrangement of liquid crystal molecules is a key step in the LCD display. This process includes:

  1. Electric field control: By applying an electric field to the transparent electrode, the arrangement of the liquid crystal molecules is adjusted to control the transmission and blocking of light.

  2. Liquid crystal molecule arrangement: Liquid crystal molecules are arranged according to the direction of the electric field to form various parts of the image.

  3. Liquid crystal molecule alignment: Make sure the liquid crystal molecules are correctly aligned across the entire screen to avoid image distortion.

  4. Light source and color filter

  In order for the LCD display to display color images, a light source and color filters are required. These steps include:

  1. Light source: Add a light source to the backlight area of the display screen, usually using cold cathode fluorescent lamps (CCFL) or LED (Light Emitting Diode).

  2. Color filters: Add color filters, usually red, green and blue filters, to adjust the color of the light respectively.

  5. Assembly and packaging

  Once all the components are ready, the assembly and packaging steps proceed. These include:

  1. Assembly: Assemble the previously prepared components, such as glass substrate, liquid crystal layer, light source and color filter, making sure they are correctly aligned.

  2. Sealing: Use special sealing materials to seal all components together to prevent dust and contamination from entering.

  3. Plastic case: Add a case to protect the display and provide support and appearance.

  6. Testing and quality control

  In the final stage of LCD display manufacturing, strict testing and quality control are performed to ensure the performance and reliability of the display. These steps include:

  1. Brightness and color test: Check whether the brightness, color accuracy and contrast of the display meet the standards.

  2. Pixel detection: Detect and repair any pixel defects, such as bright spots, dark spots or dead pixels.

  3. Functional test: Ensure that various functions of the display, such as touch screen, multi-touch, etc., are working properly.

  4. Stress test: Test the stress resistance of the display to ensure its reliability in different environments.

  7. Packaging and distribution

  The last step is to package the LCD display and distribute it to different equipment manufacturers or sellers. Packaging usually includes protective foam, cartons, and other protective materials to ensure that the display is not damaged during transportation and storage.

  The manufacturing of LCD displays is a complex and precise process involving multiple steps, from substrate preparation, coating and

  Cutting, to arrangement of liquid crystal molecules, light sources and color filters, to assembly, packaging, testing and quality control, and finally to packaging and distribution. This process requires a high degree of technology and strict quality control to ensure that the final display is of high quality, reliability and performance. The manufacturing of LCD displays is a key link in the field of modern electronic technology, providing us with a clear, colorful visual experience.

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