Backlight Module Corner Reflectors for Luminance Uniformity
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Solution Overview
Problem
Conventional liquid crystal displays (LCDs) with direct backlight modules suffer from non-uniform brightness due to dark areas at the corners and edges, which complicates design and manufacturing and affects overall image quality.
Innovation Solution
The implementation of reflectors on the corner portions of the backlight module, made from materials like silver or polyethylene terephthalate resin, to redirect light and enhance luminance uniformity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If additional light sources are disposed on the corner or edge portions of the backlight module, then the brightness uniformity is improved, but the device complexity and manufacturing difficulty increase
Solution Approach 1:
The patent introduces a reflector as an intermediary component positioned at the corner portions of the backlight module. This reflector redirects light from the LED array toward the corner areas, effectively illuminating dark regions without adding additional light sources. The reflector acts as a mediator that transforms the direction of existing light to achieve uniform brightness distribution.
Solution Approach 2:
The reflector utilizes the light already emitted by the LED array and redirects it to areas that need illumination. Instead of requiring additional independent light sources, the system uses the existing light output and redirects it through the reflector, making the existing light source serve multiple functions including illuminating corner areas.
2Illumination intensity
If additional light sources are disposed on the corner or edge portions of the backlight module, then the luminance uniformity is improved, but the manufacturing procedure becomes more complicated
Solution Approach 1:
The reflector is integrated with the frame assembly structure, combining the lighting function with the existing structural component. This merging approach allows the reflector to be manufactured and assembled as part of the overall backlight module framework, simplifying the manufacturing process compared to adding separate, independent light sources at each corner.
3Device complexity
If no light source is disposed on the corner portions, then the device complexity is reduced, but dark areas occur causing non-uniform brightness
Solution Approach 1:
The reflector is specifically positioned at the corner portions where light deficiency occurs, providing localized light redirection exactly where needed. This local intervention addresses the specific problem of corner darkness without requiring comprehensive changes to the entire lighting system, maintaining simplicity while achieving uniformity.
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 significantly improves luminance uniformity by increasing light intensity at corner areas, enhancing the overall image quality and simplifying the design process by maintaining a high level of brightness consistency across the display.
Implementation Method 1
By disposing a reflector on the corner portions of the backlight module, the undesired dark areas on the corner portions or the edges of the backlight module can be reduced
Data Source
AI summary
A plurality of reflecting structures are provided at the corner portions of a backlight module, so that the dark areas occurring at the corner portions or edges of the backlight module are prevented from forming, thereby uniforming the luminance performed by the display.