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  • Introduction to LCM structure

    Feb 27, 2021 | Articles


    1. TP

    Touch Panel touch screens, commonly 4-wire resistive touch screens. The user can use the stylus directly or fingers to operate.

    2. TFT Panel

    The panel that provides the display for the entire display module and is the most important component of the display module, the panel performance determines its display effect, high resolution, high contrast, high color reproduction, correspondingly fast time, transparent
    The characteristics of the over type, semi-permeable type, etc.

    Display size development

    The generation change of the LCD Panel plant is divided by the size of its glass substrate. 1st Generation TFT-LCD
    The glass substrate size of the production line is 300mm×400mm-320mm×400mm, and then the glass substrate size of each generation of the factory has increased compared to the previous generation, and in the third generation, it is 5XXmm×6XXmm, 6XXmm×7
    The XXmm is a 3.5-generation line, the 4-generation line is 6XXmm×8XXmm-7XXmm×9XXmm (also classified as a 4.5-generation line), and the 5-generation line is available in 1000mm×1200mm and 1100mm×1250mm sizes.


    Take Corning, the world’s largest glass substrate manufacturer, as an example, the dimensions of its glass substrates for each generation are as follows:
    G8: 2160mm×2460mm
    G7: 1870mm x 2200mm
    G6: 1500mm x 1800mm
    G5: 1100mm x 1250mm
    G4: 680mm x 880mm (Image)
    G3: 550mm x 650mm
    G2: 370mm x 470mm
    G1: 300mm×400mm



    Major suppliers of display screens

    At present, LCD panel suppliers are mainly from Japan, Korea, and Taiwan, with only Beijing Jingdong in mainland China
    Fang BOE, Shanghai Broadcasting Corporation, Shenzhen Tianma has a production line.

    Japan: TMD, SHARP, NEC, Sanyo, Kyocera, Toshiba, etc.
    Korea: Samsung, LPL.
    Introduction and Design of Small and Medium Size LCD Module Page 19
    Taiwan: AUO, CMO, TPO, CPT, Hanstar, PVI, etc.
    Hong Kong: Varitronix Varitronix (Mono, STN), Truly.
    Mainland China: BOE, SVA.

    3. BZ

    BZ, commonly known as Bezel, is a stainless steel SUS304 series material. Thicknesses commonly 0.1, 0.15, 0.2.
    0.3, 0.5mm, or other thickness.
    The main role of BZ is to strengthen the structure of the LCD module, protect the corresponding parts, reduce the impact of external forces, etc.
    Usually, where construction, thickness and price allow, the upper and lower iron frames can be designed so that the entire product can be
    Within the protection of an iron frame.

    4. BLU

    The Back Light Unit is a backlight that serves primarily to illuminate a non-self-illuminated Panel. small and medium-sized ruler
    The inch basically uses various colors of the LED light source, now, in the large size also began to use LED backlight, such as LED pen
    Notebooks, LED LCD TVs.

    5. FPA

    Flexible Printed Board Assembly. is usually divided into three types: hardboard, soft board, and soft-rigid combination board.
    The main function of the FPA flexible circuit board is to connect the display to the motherboard and to install the peripheral power of each IC.
    The circuit components, as well as other components designed. It can be bent and flexed according to design requirements, thin thickness.
    Lightweight and easy processing.

    6. PCB

    Printed Circuit Board rigid board. The main function is to connect the display to the motherboard and install other components or connected to other parts. Usually, you can do 4 layers, 8 layers, 10 layers, 20 layers of lines, etc.

    7. Duct tape

    There are generally three kinds of tapes: adhesive tape with one or two sides, insulating tape, and conductive tape. Design
    The required material does not need to be of the appropriate performance and thickness.
    The tape in the picture above is the double-sided tape used to connect the backlight to the PCB board.

    8. Accessories

    Conductive cloth, foam, tape, or some non-essential materials specified by the customer are collectively referred to as auxiliary materials. Depending on the design
    The design or assembly is done on request or at the request of the customer.

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