Backlight Holder Reflective Surface for LCD Light Efficiency
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Solution Overview
Problem
In edge-type backlight units for LCDs, the use of side tapes to improve light efficiency increases material and labor costs, and the adhesives can melt due to heat, causing luminance differences on the screen due to adhesive flow, leading to non-uniform brightness.
Innovation Solution
A display device with a reflection structure on a holder corresponding to the light-facing part of the light guide plate, which omits the need for side tapes and includes a light-blocking protrusion to prevent light leakage, using reflective materials and elastic materials for improved light guidance and blocking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If a side tape is attached to the light-facing part of the light guide plate to improve light efficiency, then light efficiency is improved, but material expenses and personnel expenses increase
Solution Approach 1:
The reflective function previously provided by the separate side tape is merged into the holder structure itself. The holder is designed with a reflective surface that directly faces the light-facing part of the light guide plate, eliminating the need for an additional side tape component while maintaining the light reflection function.
Solution Approach 2:
The holder is given multiple functions: it provides structural support for the light guide plate and simultaneously serves as a reflective surface to improve light efficiency. This multi-functional design replaces the need for separate side tapes that only provided reflection.
2Loss of energy
If a side tape with adhesive is used to attach to the light guide plate, then light efficiency is improved, but adhesives may melt due to heat and cause luminance differences on the screen
Solution Approach 1:
The adhesive layer and side tape component are completely removed from the system. The reflective function is achieved through the holder structure itself, which does not require adhesive attachment to the light guide plate, thereby eliminating the risk of adhesive melting and luminance non-uniformity.
Solution Approach 2:
The holder serves as an intermediary structure that provides the reflective function without directly contacting the light guide plate with adhesive. The reflective surface on the holder faces the light-facing part of the light guide plate, achieving light efficiency improvement without the harmful adhesive layer.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution enhances light efficiency, reduces manufacturing costs, and maintains uniform luminance by eliminating the need for side tapes and preventing adhesive-related issues, while minimizing light loss and power consumption.
Implementation Method 1
the first portion of the holder has a first light reflecting surface formed on a bottom portion of the first portion of the holder to face the light-facing part
Data Source
AI summary
A display device is provided, which includes a display panel, a light guide plate disposed in a rear of the display panel, a light source disposed adjacent to a light-incident surface of the light guide plate and configured to radiate light toward the light-incident surface of the light guide plate, and a holder disposed along a light-facing surface of the light guide plate, the light-facing surface of the light guide plate opposing the light-incident surface of the light guide plate, the holder including a supporting portion that supports a light-emitting surface of the light guide plate, the light-emitting surface of the light guide plate disposed between the light-incident surface and the light-facing surface, wherein the supporting portion of the holder has a first light reflecting surface that faces the light-facing surface of the light guide plate.