Light Source Apparatus Uniformity Control via Segmented Optical Path
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Light source apparatuses with conversion members experience brightness and color unevenness due to light emission in various directions, which is exacerbated by local dimming control, making it difficult to suppress these issues effectively.
Innovation Solution
A light source apparatus with a plurality of light sources in divided regions, a first suppressing member to control light spreading parallel to the emission surface, a conversion member to convert light colors, and a diffusing member to diffuse light, where the diffusing member is positioned apart from the conversion member to further suppress unevenness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If local dimming control is implemented to increase display contrast, then the contrast of display image is improved, but brightness unevenness and color unevenness become more remarkable due to light leakage between divided regions
Solution Approach 1:
The patent divides the light source apparatus into multiple second divided regions that correspond to the light source divided regions. By segmenting the light path control function into multiple regions with dedicated light path control members, the system can independently control light propagation in each region, preventing light leakage between regions while maintaining local dimming control effectiveness.
Solution Approach 2:
The patent introduces light path control members as intermediary elements between the light sources and the display panel. These members act as mediators that selectively control and guide light paths, allowing light from each divided region to reach only its corresponding display region while blocking light from reaching other regions, thus solving the light leakage problem.
2Ease of manufacture
If light is emitted from phosphor in various directions to provide wide color gamut, then color purity is improved, but light spreads to adjacent divided regions causing brightness and color unevenness
Solution Approach 1:
The patent segments the light path control into multiple independent regions using light path control members for each divided region. This segmentation allows each region to independently manage its light emission patterns, containing the beneficial omnidirectional light emission within each region while preventing cross-contamination to adjacent regions.
Solution Approach 2:
The patent applies different light path control characteristics to different regions through the light path control members. Each member is configured to provide appropriate light guidance and restriction for its specific region, creating local optimization of light distribution that maintains color purity while ensuring brightness uniformity across the overall display.
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 brightness and color unevenness by controlling light spreading and leakage between regions, improving the uniformity of light emission and contrast during local dimming control.
Implementation Method 1
a conversion member that is provided on a side closer to the emission surface than the plurality of light sources and the first suppressing member so as to convert the color of the light emitted from the plurality of light sources and emit light of the converted color
Data Source
AI summary
A light source apparatus includes: a plurality of light sources provided, respectively, in a plurality of first divided regions; a first suppressing member that suppresses, for each of the plurality of first divided regions, spreading of light emitted from a light source provided in the first divided region; a conversion member that converts the color of the light emitted from the light sources and emits light of the converted color; and a diffusing member that is provided on a side closer to the emission surface than the conversion member so as to diffuse the light emitted from the conversion member, wherein the diffusing member is apart from the conversion member by a predetermined distance.