Light Diffusion Sheet Layout for Uniform Matrix Backlighting
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Solution Overview
Problem
Traditional light diffusion sheets in liquid crystal displays fail to achieve sufficient luminance uniformity, particularly in edge-lit backlight units.
Innovation Solution
A light diffusion sheet with recesses in a two-dimensional matrix, arranged at an intersecting angle of 30° to 60° with respect to the light sources, enhances luminance uniformity by increasing light intensity in diagonal directions where sources are farther apart.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If traditional light diffusion sheets are used, then the structure is simple, but the luminance uniformity is insufficient
Solution Approach 1:
The light diffusion sheet is divided into multiple recesses arranged in a two-dimensional matrix, where each recess acts as an independent light diffusion element. This segmentation allows precise control over light distribution patterns to achieve uniform luminance across the display screen.
Solution Approach 2:
The invention introduces a third dimension by creating recesses with specific depths and angles in the light diffusion sheet. The intersecting angle between the recess arrangement and light source arrangement (30°-60°) adds dimensional complexity that enables improved light distribution uniformity while maintaining manufacturing feasibility.
2Area of stationary object
If the distance between light sources is increased, then the coverage area is expanded, but the luminance uniformity deteriorates
Solution Approach 1:
By creating recesses with specific depths and arranging them in a two-dimensional matrix with an intersecting angle of 30°-60° relative to the light source arrangement, the invention adds a vertical dimension to light diffusion. This enables effective light distribution over larger areas while maintaining luminance uniformity through the geometric relationship between recess orientation and light source positioning.
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 improves luminance uniformity by optimizing light distribution, especially in diagonal directions, using a light diffusion sheet with recesses arranged at specific angles to enhance light emission from a two-dimensional matrix of light sources.
Implementation Method 1
a light diffusion sheet having surfaces, on at least one of which a plurality of recesses having a substantially inverted quadrangular pyramid shape are arranged in a two-dimensional matrix
Implementation Method 2
a light diffusion sheet having surfaces, on at least one of which a plurality of recesses having a substantially inverted quadrangular pyramid shape are arranged in a two-dimensional matrix
Data Source
AI summary
A light diffusion sheet is incorporated in a backlight unit using a plurality of light sources arranged in a two-dimensional matrix. The light diffusion sheet has surfaces, on at least one of which a plurality of recesses having a substantially inverted quadrangular pyramid shape are arranged in a two-dimensional matrix. An intersecting angle between an arrangement direction of the plurality of recesses and an arrangement direction of the plurality of light sources is 30° or more and 60° or less.