Edge-Light Backlight Housing with Thermal Segmentation
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Solution Overview
Problem
The existing edge light type backlights for liquid crystal panels suffer from deformation due to heat generated by the light source, which is transmitted through the housing and causes warping or bending of the side walls.
Innovation Solution
A light-source device with a housing featuring a separation part on the bottom plate, where the light source is fixed to face one end of the light guide plate, and a cover part with a heat insulating member is used to prevent heat transfer, thereby reducing thermal expansion and deformation of the side walls.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the light source is disposed along one side wall of the housing to illuminate the light guide plate, then the backlight structure is simplified and manufacturing is easier, but heat generated by the light source is transmitted through the bottom plate to cause deformation of the opposite side walls
Solution Approach 1:
The bottom plate is segmented into a first portion and a second portion by a separation part, spatially isolating the light source from the opposite side wall. This segmentation prevents heat generated by the light source from being transmitted to the opposite side wall, thereby preventing deformation while maintaining the simplified edge light structure
Solution Approach 2:
The separation part acts as an intermediary barrier between the light source and the opposite side wall. It interrupts the heat conduction path through the bottom plate, serving as a thermal isolation mechanism that prevents heat transmission from the light source to the opposite side wall
2Volume of moving object
If the housing is formed as a shallow bottom box shape to accommodate the light guide plate and light source, then the overall structure is compact and space-efficient, but heat from the light source causes warping or bending in the opposite side walls
Solution Approach 1:
The bottom plate is divided into distinct portions by the separation part, creating thermal zones that isolate the heat-generating light source from the opposite side wall. This segmentation maintains the compact shallow housing structure while preventing heat-induced warping of the side walls
Solution Approach 2:
The separation part is strategically positioned at the bottom plate to create localized thermal isolation. This local structural feature prevents heat transmission specifically to the opposite side wall without affecting the overall compact housing design, thereby maintaining manufacturing precision
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 restrains deformation of the side walls by isolating heat generated by the light source, maintaining structural integrity and preventing warping or bending of the housing.
Implementation Method 1
a cover part with a heat insulating member is used to prevent heat transfer
Data Source
AI summary
There are provided a light-source device which is capable of restraining deformation of side walls of a housing due to heat generated by the light emission of the light source, and a display apparatus. A light-source device is provided with a light guide plate which is placed on a bottom plate of a housing having an opening formed at one surface thereof, and a light source which is fixed to the housing and is arranged to face one end face of the light guide plate, and the bottom plate of the housing has a separation part that separates the bottom plate into a first portion in which the light source is disposed and a second portion in which the light source is not disposed.