Light-Reflecting Member Structure for Uniform Surface Brightness
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Solution Overview
Problem
Existing light source devices experience uneven brightness in the light-emitting surface due to regions where light sources cannot be placed, leading to irregular light distribution.
Innovation Solution
A light-reflecting member with demarcated regions of varying heights and wall configurations that facilitate efficient light reflection, including first regions with uniform inner wall portions and second regions with lower outer wall portions, ensuring even light distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If light sources are arranged in a matrix on a substrate with light-reflecting wall portions surrounding each light source, then light distribution is demarcated into regions, but uneven brightness occurs in the light-emitting surface due to regions where light sources cannot be placed
Solution Approach 1:
The patent applies local quality by differentiating between first regions (with uniform wall heights) and second regions (with lower outer wall portions) to create localized optical characteristics. This allows light to be reflected differently in different areas, compensating for the absence of light sources in certain regions and achieving overall brightness uniformity across the light-emitting surface.
Solution Approach 2:
The patent introduces height variation as an additional dimension to control light reflection. By creating wall portions with different heights (first wall portions with height H1 and second wall portions with height H2 where H2 < H1), the patent adds a vertical dimension to the otherwise two-dimensional light source arrangement, enabling compensation for missing light sources through three-dimensional light path control.
2Device complexity
If demarcated regions include areas where light sources cannot be disposed, then the light-reflecting member structure is simplified, but uneven brightness occurs within the light-emitting surface
Solution Approach 1:
The patent applies parameter changes by varying the height parameter of the light-reflecting wall portions across different regions. Specifically, the outer wall portions in second regions have a smaller height (H2) compared to the inner wall portions (H1), creating a gradient in the light reflection parameter that compensates for the absence of light sources and maintains brightness uniformity.
Solution Approach 2:
The patent implements local quality by creating distinct first regions with uniform wall heights and second regions with lower outer wall portions. This local differentiation in wall height allows each region to be optimized for its specific function: first regions for direct light reflection and second regions for compensating light distribution in areas without light sources.
3Illumination intensity
If wall portions surrounding demarcated regions have varying heights, then light reflection is optimized for even distribution, but manufacturing complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the light-reflecting member into distinct first regions and second regions with different wall height characteristics. This segmentation allows each region to be independently optimized for light reflection while maintaining overall manufacturing feasibility through modular design and standardized production processes.
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 or prevents uneven brightness in the light-emitting surface by optimizing light reflection, even when light sources cannot be placed in all regions.
Implementation Method 1
a plurality of first wall portions 11W and a plurality of second wall portions 12W... light from the LED light sources being directed by the inclined surfaces towards the side on which the chassis is open
Data Source
Figure 1A
Figure 1B
Figure 1C
AI summary
A light-reflecting member includes a plurality of first regions and a plurality of second regions. The first regions are each defined by a first portion and a plurality of first wall portions surrounding the first portion in a plan view with the first wall portions being connected to the first portion. The first regions are arranged in a tessellation in the plan view. The second regions are arranged on an outer side relative to the first regions in the plan view. Each of the second regions includes a second portion located higher than the first portion of each of the first regions. The second portion is connected to at least one second wall portion on a side closer to an adjacent one of the first regions, the at least one second wall portion having a height smaller than a height of the first wall portion as measured from the first portion.