What does the shading area of the backlight consist of?
Time：2024-02-22

The light-blocking area of a backlight unit is an integral component that serves a crucial role in preventing light leakage from the rear side, thereby enhancing the brightness and contrast of the display. The light-blocking area consists of several key elements, each with its specific function and purpose.

  1. Light Guide Plate: The light guide plate is the primary component of the light-blocking area, typically made of metal or plastic. Its purpose is to block light leakage from the rear side and guide the light towards the front of the display. The shape and dimensions of the light guide plate depend on the size and design of the backlight unit.

  2. Metal Frame: The metal frame, often made of aluminum alloy or stainless steel, is responsible for securing the light guide plate and maintaining the integrity of the light-blocking area. The metal frame is usually treated to enhance its corrosion resistance and aesthetics.

  3. Light Absorbing Material: Light-absorbing materials are employed to further reduce light leakage by absorbing excess light emitted from the backlight unit. Commonly used light-absorbing materials include black tapes and coatings. These materials effectively absorb light, thereby enhancing the contrast and brightness of the display.

  4. Sealing Material: To ensure the air-tightness and water-tightness of the light-blocking area, sealing materials such as silicone gel or hot melt adhesive are applied along the edges of the area. These sealing materials protect the backlight unit from external factors such as moisture and dust, thereby safeguarding its stability and longevity.
     

In summary, the light-blocking area of a backlight unit is a complex and intricate structure, with each component playing a critical role. Only when these components are appropriately selected and designed can the performance and stability of the backlight unit be ensured. By optimizing the design of the light-blocking area, visual effects of the display can be improved, providing users with an enhanced viewing experience.

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