Backplate Bridging Structure for LCD Backlight Positioning
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Solution Overview
Problem
Conventional backlight modules for LCD devices are costly and have low light coupling efficiency due to the use of heat dissipating aluminum extruded pieces, which are no longer necessary with advancements in light source packaging and thermally conductive materials.
Innovation Solution
A backplate with a polyhedral 3D bridging structure that supports and accurately positions the light source and light guide plate, eliminating the need for heat dissipating aluminum extruded pieces and enhancing light coupling efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If heat dissipating aluminum extruded piece is used, then heat dissipation function is provided, but cost increases and positioning accuracy deteriorates
Solution Approach 1:
The patent removes the heat dissipating aluminum extruded piece from the backlight module structure. With advancements in light source packaging and thermally conductive materials, the patent determines that dedicated heat dissipation components are no longer necessary, thereby eliminating cost and simplifying the overall structure while maintaining thermal management effectiveness through improved material properties at the source.
Solution Approach 2:
The backplate is designed to perform multiple functions simultaneously: it provides structural support for the light guide plate, positions the light source and light guide plate with high precision through integrated bridging structures, and maintains thermal management capabilities. This multi-functional design eliminates the need for separate heat dissipation components.
2Reliability
If heat dissipating aluminum extruded piece is used, then heat dissipation function is provided, but positioning accuracy of light source and light guide plate deteriorates
Solution Approach 1:
The backplate is designed to perform multiple functions simultaneously: it provides structural support for the light guide plate, positions the light source and light guide plate with high precision through integrated bridging structures, and maintains thermal management capabilities. This multi-functional design eliminates the need for separate heat dissipation components.
Solution Approach 2:
The bridging structures serve as intermediary elements that connect and position the light source and light guide plate with high precision. These structures extend from the side plates into the receiving space, providing accurate positioning surfaces that ensure optimal alignment between optical components without requiring separate positioning fixtures.
3Reliability
If conventional backlight module structure is used, then heat dissipation is achieved, but light coupling efficiency decreases
Solution Approach 1:
The patent removes the heat dissipating aluminum extruded piece from the backlight module structure. With advancements in light source packaging and thermally conductive materials, the patent determines that dedicated heat dissipation components are no longer necessary, thereby eliminating cost and simplifying the overall structure while maintaining thermal management effectiveness through improved material properties at the source.
Solution Approach 2:
The bridging structures serve as intermediary elements that connect and position the light source and light guide plate with high precision. These structures extend from the side plates into the receiving space, providing accurate positioning surfaces that ensure optimal alignment between optical components without requiring separate positioning fixtures.
Data Source
AI summary
A backlight module comprises a light guide plate, at least one light source and a backplate. The backplate comprises a baseplate, four side plates and at least one bridging structure. The backplate is used for supporting the light guide plate, and the side plates are disposed perpendicular to the baseplate respectively to form a receiving space for receiving the light guide plate. The at least one bridging structure extends inwards from an inner surface of the side plates by a certain distance to support and locate the at least one light source and the light guide plate. According to the present disclosure, because at least one bridging structure for supporting the light source is disposed on the side plate of the backplate, use of the heat dissipating aluminum extruded piece can be eliminated to reduce the cost; and furthermore, the at least one bridging structure can be used to accurately fix the positions of the light source and the light guide plate relative to each other, so the light coupling efficiency is relatively high.