Backlight Module Frame Curved Inner Surface Light Leakage
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Solution Overview
Problem
Conventional liquid crystal display devices suffer from light leakage at the edges due to total reflection of light within the light guide plate, leading to uneven illumination and image quality issues.
Innovation Solution
The backlight module incorporates a frame with a side wall featuring a recessed space and a curved or stepped first inner surface that recycles light emitted from the light guide plate by reflecting it back, reducing light leakage and enhancing illumination through optical conversion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a conventional light guide plate with a flat outer frame is used, then the structure is simple and easy to manufacture, but light leaks at the edges causing bright lines and uneven illumination
Solution Approach 1:
The side wall of the frame is designed with a curved first inner surface that is concave toward the light guide plate. This curved surface recycles light that would otherwise leak at the edges by reflecting it back through the light guide plate, eliminating bright lines and improving illumination uniformity without adding complex mechanical components
Solution Approach 2:
The solution moves from a flat, two-dimensional frame interface to a three-dimensional curved surface. The concave curvature adds a new dimensional aspect to light reflection, enabling light recycling that was not possible with conventional flat surfaces, thereby improving illumination uniformity
2Use of energy by moving object
If light is allowed to exit the lateral side of the light guide plate, then the light path is simple, but light is wasted and does not contribute to display illumination
Solution Approach 1:
The curved first inner surface converts the harmful effect of light leakage into a beneficial reflection mechanism. Light that would normally be wasted at the edges is now reflected back through the light guide plate and optical films, contributing to uniform illumination and improving overall light energy utilization
Solution Approach 2:
The frame structure itself performs the light recycling function through its curved first inner surface. The frame does not require additional mirrors or reflective components; instead, its own geometric shape enables the light reflection and recycling process, making the system self-sufficient
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
The solution effectively reduces light leakage and improves overall illumination and energy efficiency by recycling light emitted from the light guide plate, resulting in more uniform and enhanced image quality for liquid crystal display devices.
Implementation Method 1
The first inner surface substantially faces the disposition space and the light guide plate... the distance between the first inner surface and the outer surface decreases as the first inner surface comes closer to the bottom of the side wall
Data Source
AI summary
This present invention discloses a backlight module including a frame and a light guide plate. The frame includes a base plane and a side wall, wherein the side wall is disposed at the edge of the base plane and encloses a disposition space. The side wall includes a first inner surface and an outer surface, wherein a distance between the first inner surface and the outer surface is decreased as the first inner surface comes closer to a bottom of the side wall. The light guide plate is disposed on the base plane and within the disposition space, wherein the first inner surface sinks toward the outer surface and a recessed space is formed between the first inner surface and a lateral side of the light guide plate.