Prism Member Segmentation for Backlight Luminance
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Solution Overview
Problem
Conventional liquid crystal display devices experience luminance issues due to the generation of bright lines caused by the deviation or deformation of prism members under external impacts or environmental conditions, which affects the display quality.
Innovation Solution
A prism member with a plate-type body and unit light-concentrating portions arranged along specific directions, featuring non-light-concentrating regions with irregular cross-sections and shapes, which minimizes bright line formation by optimizing the distance between the light source and the prism member, ensuring consistent luminance and diffused light distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the prism member is disposed close to the light source to concentrate light and improve luminance, then luminance characteristics are improved, but bright lines are generated due to deviation or deformation
Solution Approach 1:
The prism member is divided into multiple unit light-concentrating portions arranged in a matrix pattern, where each unit independently concentrates light. This segmentation prevents the formation of continuous bright lines while maintaining overall luminance enhancement, as the discrete units create localized concentration zones rather than continuous bright lines.
Solution Approach 2:
The unit light-concentrating portions are designed with asymmetric positioning and spacing patterns that disrupt the formation of regular bright lines. The non-uniform arrangement prevents coherent light interference patterns that would otherwise create visible bright lines, while still achieving effective light concentration for luminance improvement.
2Reliability
If the prism member is spaced apart from the light source to prevent bright lines, then display quality is maintained, but luminance characteristics deteriorate
Solution Approach 1:
By segmenting the prism into multiple small light-concentrating units, the system achieves effective light concentration at larger distances from the light source. Each unit acts as an independent optical element that can effectively concentrate light even when the overall prism is positioned farther from the light source, thus maintaining luminance without requiring close proximity that would cause bright lines.
3Length of moving object
If the prism member is made thin to reduce device thickness, then down-sizing is achieved, but manufacturing precision becomes more difficult
Solution Approach 1:
Segmenting the prism into multiple small light-concentrating units allows each unit to be manufactured with standard precision tolerances. The divided structure means that even if individual units have minor variations, the overall optical performance is maintained through the collective action of multiple units, reducing the stringency of manufacturing precision requirements compared to a single large-prism design.
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 enhances luminance characteristics and viewing angles by uniformly diffusing light, maintaining display quality even under positional changes or environmental stressors, thereby improving the external quality of the display device.
Implementation Method 1
The prism member concentrates the light passed therethrough so as to improve luminance
Implementation Method 2
uniformly diffusing light
Implementation Method 3
prism member...arranged along a first direction and a second direction crossing the first direction
Data Source
AI summary
A prism member, a backlight assembly having the same, and a display device having the same, wherein the prism member includes a plate-type body portion having a thickness, and a plurality of unit light-concentrating portions formed on the body portion and arranged along a first direction and in a second direction crossing the first direction.