A comprehensive introduction to the backlight light guide plate

The light-enhancing structure of the backlight light guide plate:

     The light-enhancing structure of the light guide plate is composed of first and second optical cutting surfaces. The first and second optical cutting surfaces are formed by the surface of the light guide plate obliquely extending a certain distance toward the end of the light guide plate and then contacting each other. The light emitted by the light source arranged at the end of the light guide plate can be emitted toward the expected surface of the light guide plate through the optical refraction of the first optical cutting surface. And part of the refracted light deflected by the first optical cutting surface can also fall on the second optical cutting surface, and be emitted toward the expected surface of the light guide plate through the optical reflection of the second optical cutting surface, so as to increase the light guide plate Brightness performance effect.

The function and requirements of the backlight light guide plate

      As the name suggests, the main function of the light guide plate is to guide the light to the direction required by the designer. All the light guide plates are designed to meet the needs of downstream products LCD and backlight modules. The most important thing is to achieve brightness and uniformity. Spend.

Classification of backlight light guide plate

    Generally speaking, light guide plates have different classifications due to their shapes, production methods and functions, and there is currently no unified classification. After sorting:

1. According to the shape, it is divided into: flat plate and wedge plate (inclined plate)

    Flat plate: the light guide plate is rectangular when viewed from the light incident

    Wedge-shaped plate: From the point of light incident, one side is thick and the other side is thin and wedge-shaped (triangular) shape

2. According to the method of dot production: printed and non-printed

    Printing: After the light guide plate is processed, the dots are printed on the reflective surface by printing, and it is divided into two types: IR and UV

    Non-printing type: The dots are directly formed on the reflective surface when the light guide plate is formed. It is divided into chemical etching (Etching), precision mechanical characterization (V-cut), photolithography (Stamper), internal diffusion

3. According to the light input method: side light (tube and LED) and direct light

    Side-light type: place the luminous body (tube or LED) on the side of the light guide plate

    Direct type: place the luminous body (tube or LED) under the light guide plate

4. According to the forming method: injection forming and cutting forming

    Injection molding: Use an injection molding machine to inject optical grade PMMA particles into a mold at high temperature and high pressure to cool and shape

    Cutting and forming: the optical grade PMMA original board is cut to complete the finished product