Backlight Module Layout for Slim Display Heat Dissipation
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Solution Overview
Problem
Existing display apparatuses face challenges in efficiently dissipating heat generated by slim light sources, leading to reduced reliability due to high temperature transfer affecting components like the light conversion member and diffusion sheet, which degrades performance.
Innovation Solution
The display apparatus incorporates a light source module with a direct contact between the LED chip and a rear chassis, utilizing a housing with high thermal conductivity to efficiently dissipate heat, and omits diffusion and reflective sheets to maintain slimness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If the separation distance between components in the backlight unit is reduced to achieve slimness, then the thickness of the display apparatus is decreased, but heat generated from the light source is transferred to other components, deteriorating reliability
Solution Approach 1:
The patent removes the diffusion sheet and reflective sheet from the backlight unit structure. By extracting these components, the light path is optimized to allow light to reach the display panel more directly, eliminating the need for these intermediate layers. This reduction in component layers achieves slimness while the redesigned light path and direct LED-to-chassis mounting improve heat dissipation, preventing thermal damage to remaining components.
Solution Approach 2:
The patent merges the LED chip mounting directly onto the rear chassis, eliminating separate mounting structures and intermediate components. This integration allows the rear chassis to serve dual purposes: structural support and heat dissipation pathway. The direct thermal contact between LED chip and chassis creates an efficient heat transfer route, resolving the contradiction between compact design and thermal management.
2Illumination intensity
If diffusion sheets and reflective sheets are included in the backlight unit, then light distribution is improved, but the overall thickness increases and heat dissipation efficiency decreases
Solution Approach 1:
The patent extracts and removes the diffusion sheet and reflective sheet from the optical path. By eliminating these layers, the backlight unit thickness is significantly reduced. The patent compensates for the lost light distribution function through optimized LED arrangement and direct light transmission paths, achieving acceptable uniformity without the thermal and thickness penalties of traditional diffusion/reflective sheet designs.
3Reliability
If traditional backlight components are used with adequate separation, then reliability is maintained, but the display apparatus cannot achieve slimness
Solution Approach 1:
The patent merges the LED chip mounting structure directly with the rear chassis, creating an integrated assembly. This consolidation eliminates intermediate mounting components and reduces the separation distance between light-generating and light-dissipating elements. The rear chassis serves as both structural support and heat sink, maintaining component reliability through direct thermal coupling while achieving the slim profile required by modern display designs.
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 enhances heat dissipation, maintains slimness, and improves reliability by preventing thermal discoloration and expansion of components, ensuring efficient light transmission and performance.
Implementation Method 1
a light source module 100 including a light source 110 mounted on a mounting surface 121 of a substrate 120 facing in a direction opposite to a first direction A, the light source 110 emitting light in the first direction A
Implementation Method 2
utilizing a housing with high thermal conductivity to efficiently dissipate heat
Data Source
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AI summary
A display apparatus includes a display panel (20) configured to display an image; a light source module (100) provided behind a rear surface of the display panel (20) and configured to emit light to the display panel (20), the light source module (100) including a glass substrate (120) and a light source (110) provided behind a rear surface of the glass substrate (120); and a rear chassis (60) covering the display panel (20) and the light source module (100), wherein the light source (110) is provided between the glass substrate (120) and the rear chassis (60).