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How does the LCD TV distinguish whether it uses a light guide plate or a tv diffuser sheet?

2021-10-22

Panel light tv diffuser sheet refers to the scattering phenomenon caused by light passing through other media in the process of advancing. As long as it is two different media, the light from A to B will cause the light to penetrate or reflect due to the hindrance of the refractive index or interference material. Or absorption, the penetrating part will cause dispersion and so-called light diffusion, which has three physical phenomena.
The light guide plate of the panel light is made of optical grade acrylic/PC sheet, and then high-tech materials with high reflectivity and non-light absorption are used to print the light guide on the bottom surface of the optical grade acrylic sheet with UV screen printing technology. point. Use optical grade acrylic sheet to absorb the light emitted from the lamp and stay on the surface of the optical grade acrylic sheet. When the light hits each light guide point, the reflected light will spread to all angles, and then destroy the reflection conditions. The light guide plate Shot from the front. Through a variety of sparse and dense light guide points of different sizes, the light guide plate can emit light uniformly. The purpose of the reflective sheet is to reflect the light exposed on the bottom surface back into the light guide plate to improve the efficiency of light use. Functional differences:

The main functions of   tv diffuser sheet are:
  1. Disperse the luminous flux to make the light evenly distributed (some composite diffusers can not only make the light uniform, but also control the exit angle);
  2. Support the backlight structure to protect the optical materials underneath from damage.


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The main functions of    light guide plate are:
  1. The luminous flux of the point light source of the LED panel light is guided to be evenly distributed in the entire surface. Its key role is to guide the distribution of light;
  2. Use the reflection mechanism to more efficiently use the luminous flux and control the light distribution.


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   Differences in application areas:
  1. Acrylic light guide plate is suitable for LED lighting fixtures with direct light sources, such as grille lights and high-end aluminum lights;
  2, PC diffuser plate is suitable for side-source LED lighting fixtures, such as flat panel lights, professional film viewers, and is usually used with light guide plates;
  3, PS diffuser is mainly used for some low-grade ordinary LED lights.

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