Removable Light Source Unit for LCD Backlight Maintenance
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Solution Overview
Problem
Existing liquid crystal display (LCD) devices require the entire backlight assembly to be replaced when the light source unit expires, making maintenance and cost-effectiveness challenging due to the complexity of replacing only the light source unit.
Innovation Solution
A display device design featuring a removable light source unit with an alignment plate and point light sources that can be easily coupled and decoupled from a lower receptacle, allowing for direct heat transfer and minimizing friction, enabling easy replacement without disassembling the entire backlight assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the entire backlight assembly is replaced when the light source unit expires, then the display device can be restored to full functionality, but the maintenance cost and complexity increase significantly
Solution Approach 1:
The backlight assembly is divided into separable components: the light source unit (with light source, reflector, and diffuser) and the backlight housing. The light source unit can be independently removed and replaced through an access opening without disassembling the entire backlight assembly, enabling selective maintenance of only the expired component while preserving the functional housing and optical elements.
2Ease of repair
If the light source unit is designed to be independently replaceable, then maintenance cost and time are reduced, but the structural complexity of the backlight assembly increases
Solution Approach 1:
The backlight assembly transitions from a fixed, integrated structure to a dynamic, reconfigurable structure. The light source unit is designed with movable components including a sliding reflector that can move between extended and retracted positions, and a diffuser that can be independently removed. This dynamic design allows easy access and replacement of the light source while maintaining structural integrity during normal operation.
3Duration of action of moving object
If the light source unit remains in the backlight assembly after expiration, then the display device continues to operate, but heat accumulation increases and reduces overall system lifespan
Solution Approach 1:
The expired light source unit is extracted and removed from the backlight assembly through an access opening without requiring disassembly of the housing or optical elements. This extraction eliminates the heat source while preserving the functional components (reflector, diffuser, housing), allowing heat dissipation and preventing thermal accumulation that would otherwise reduce the lifespan of remaining components.
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 design extends the life span of the light source unit by improving heat dissipation and simplifies maintenance by allowing for straightforward replacement of the light source unit, reducing costs and enhancing operational efficiency.
Implementation Method 1
The light source unit contacts the sidewalls, and direct heat transfer is enabled
Data Source
AI summary
A display device including a display panel which displays images, an intermediate frame on which the display panel is seated, a lower receptacle which includes a first receiving portion including a bottom plate and sidewalls, and a second receiving portion separate from the first receiving portion, and a light source unit which includes an alignment plate and a point light source mounted on the alignment plate. The light source unit contacts the sidewalls of the lower receptacle, and the first receiving portion is coupled with the intermediate frame.