Display Backlight Lens Layout for Uniform Luminance
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Solution Overview
Problem
Existing display apparatuses face challenges in achieving improved luminous efficiency and uniform luminance due to the configuration of light sources.
Innovation Solution
The display apparatus incorporates a light source device with a substrate featuring a combination of first light sources, each equipped with a first light-emitting diode and an anisotropic reflection lens, and second light sources positioned between adjacent first light sources, utilizing a refractive lens to enhance light distribution and uniformity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If only first light sources with anisotropic reflection lenses are used, then the light distribution can be controlled in specific directions, but the luminous efficiency and uniformity of luminance across the display panel are insufficient
Solution Approach 1:
The light source array is segmented into two distinct types: first light sources with anisotropic reflection lenses for directional light control, and second light sources with refractive lenses for omnidirectional light distribution. This segmentation allows each type to perform its specialized function, improving overall luminance uniformity while maintaining manageable system complexity through modular design
Solution Approach 2:
Different regions of the display panel receive light from different light source types optimized for their specific requirements. The second light sources with refractive lenses are positioned to illuminate regions requiring higher uniformity, while first light sources with anisotropic reflection lenses serve regions where directional control is prioritized, achieving local optimization of luminance quality
2Productivity
If light sources are spaced further apart to reduce interference, then individual light source performance is maintained, but the overall luminous efficiency and coverage decrease
Solution Approach 1:
The second light sources act as intermediary elements between the first light sources, filling in the optical gaps and redistributing light energy. The refractive lenses on second light sources diffuse light in multiple directions, mediating the interaction between adjacent first light sources and reducing harmful interference while maintaining high luminous efficiency through optimized light utilization
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
This configuration improves luminous efficiency and ensures uniform luminance across the display panel by optimizing light emission and distribution patterns.
Implementation Method 1
an anisotropic reflection lens configured to cover the first light-emitting diode
Implementation Method 2
a refractive lens configured to cover the second light-emitting diode
Data Source
AI summary
A display apparatus includes a display panel and a light source device that provides light to the display panel. The light source device includes a substrate and a plurality of first light sources on the substrate. The plurality of first light sources each include a first light-emitting diode and an anisotropic reflection lens configured to cover the first light-emitting diode. The light source device includes a second light source on the substrate and provided between two adjacent first light sources among the plurality of first light sources. The second light source includes a second light-emitting diode and a refractive lens configured to cover the second light-emitting diode.