Display Substrate Light Source Groove Heat Dissipation
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Solution Overview
Problem
As display devices transition from 4K to 8K image quality, the light transmittance of display panels decreases, necessitating a more efficient backlight unit that can maintain uniform brightness while managing heat and reducing power consumption, all while optimizing space and reliability.
Innovation Solution
A display device design featuring a substrate with a conductive layer and a light source groove, where the light source is electrically connected to the conductive layer, allowing for improved light distribution and heat dissipation, and incorporating a light source cap to protect the light source during assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the light transmittance of display panel is increased to maintain uniform brightness, then the brightness uniformity is improved, but the light transmittance of display panel increases causing more light loss
Solution Approach 1:
The patent applies local quality by creating a light source groove at a specific location on the substrate, concentrating the light emission function in a localized area. This groove structure allows for optimized light distribution characteristics, improving brightness uniformity while controlling light loss through precise geometric design of the groove dimensions and positioning.
Solution Approach 2:
The patent introduces a vertical dimension by forming a groove structure that extends downward from the substrate surface. This three-dimensional configuration allows light to be emitted from multiple levels and angles, enhancing brightness uniformity across the display panel while managing light transmission efficiency through the layered substrate structure.
2Illumination intensity
If the backlight unit is designed to provide more light, then the brightness uniformity is improved, but the heat generation increases
Solution Approach 1:
The patent extracts the light source from the bulk substrate material by creating a groove and positioning the light source within this recessed structure. This separation allows for independent thermal management, where heat can be dissipated more effectively from the concentrated light source area without affecting the entire substrate, thus maintaining brightness uniformity while controlling heat generation.
Solution Approach 2:
The groove structure acts as an intermediary between the light source and the substrate, providing a thermal interface that facilitates heat dissipation. The groove geometry and material composition can be optimized to conduct heat away from the light source while maintaining the optical properties needed for uniform brightness distribution.
3Device complexity
If the substrate structure is simplified to reduce manufacturing complexity, then the device complexity is reduced, but the light efficiency and heat dissipation performance deteriorate
Solution Approach 1:
The patent segments the substrate into distinct functional zones: a light source groove region for optimized light emission, conductive layers for electrical connection and thermal management, and other substrate regions for structural support. This segmentation allows each zone to be optimized independently for its specific function, maintaining light efficiency and heat dissipation performance while keeping the overall manufacturing process manageable through modular design.
4Ease of manufacture
If the substrate structure is simplified to ease manufacturing, then the ease of manufacture is improved, but the reliability of backlight unit deteriorates
Solution Approach 1:
The patent merges multiple critical functions into the groove structure itself: light emission containment, electrical connection pathways, and thermal management features are integrated into this single geometric element. This consolidation improves reliability by ensuring proper alignment and connection of critical components while maintaining ease of manufacture through a unified structure that can be formed in a single manufacturing step rather than requiring multiple assembly operations.
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 enhances light efficiency, reduces power consumption, improves heat dissipation, and increases space efficiency, while maintaining uniform brightness and reliability of the backlight unit.
Implementation Method 1
a conductive layer stacked on the first substrate... the light source is electrically connected to the conductive layer
Implementation Method 2
a light source mounted on the substrate and configured to provide light to the display panel
Implementation Method 3
a light source groove formed by removing a portion of the second substrate to allow the conductive layer to be exposed therethrough
Data Source
AI summary
A display device that includes: a display panel; a frame disposed at a rear of the display panel; a substrate disposed between the display panel and the frame; and a light source mounted on the substrate. The substrate includes: a first substrate; a conductive layer located on the first substrate; a second substrate located on the conductive layer; and a light source groove formed in a portion of the second substrate to permit a portion of the conductive layer to be exposed therethrough. The light source is disposed in the light source groove and is electrically connected to the conductive layer.