Display Device Heat Sink Groove Design for Thermal Management
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Solution Overview
Problem
In liquid crystal display devices, the proximity of heat radiators to light sources leads to adverse effects on the characteristics and lifespan of the light sources due to heat convection.
Innovation Solution
A display device design featuring a lower frame with a heat sink that includes groove portions along its bottom wall, allowing for efficient heat dissipation from light sources, with the heat sink extending to a recessed portion and optionally intersecting grooves for enhanced heat transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a radiator plate or heat conductive tape is arranged in the vicinity of the light source to dissipate heat, then heat dissipation capability is improved, but heat convection occurs in the vicinity of the light source which adversely affects the characteristics and life of the light source
Solution Approach 1:
The invention extracts the harmful heat away from the light source vicinity by introducing a dedicated heat dissipation chamber that separates the heat generation zone from the light source. The heat dissipation chamber receives heat from the light source through a heat conductive member and transports it to a heat radiation portion, effectively removing heat from the critical area where it causes convection and damage.
Solution Approach 2:
The invention introduces a heat conductive member as an intermediary between the light source and the heat dissipation chamber. This intermediary component efficiently transfers heat from the light source to the heat dissipation chamber, enabling heat removal without direct contact between the light source and the radiator structure, thereby preventing harmful convection currents.
2Productivity
If heat dissipation structures are placed close to light sources, then heat removal efficiency is improved, but temperature near light sources increases causing adverse effects
Solution Approach 1:
The invention segments the heat dissipation function into distinct components: a heat conductive member that contacts the light source, a heat dissipation chamber that receives and transports heat, and a heat radiation portion that releases heat to the environment. This segmentation allows efficient heat removal while maintaining spatial separation between the heat source and the radiation structure, preventing temperature increase near the light source.
Solution Approach 2:
The invention extends the heat dissipation path into a three-dimensional structure with a dedicated heat dissipation chamber that protrudes from the housing. This dimensional extension creates a separate heat transport pathway that efficiently removes heat from the light source area without requiring the radiator to be positioned close to the light source, thereby maintaining low temperatures in the vicinity of the light source.
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 effectively reduces the temperature near the light sources, improving their reliability and prolonging their lifespan by preventing heat-related changes in characteristics and enhancing heat dissipation.
Implementation Method 1
a heat sink configured to dissipate heat generated from the plurality of light sources
Implementation Method 2
the heat generated from the light source experiences convection in the vicinity of the light source
Implementation Method 3
The plurality of groove portions are formed at the bottom portion
Implementation Method 4
allowing for efficient heat dissipation from light sources
Data Source
AI summary
A display device includes a lower frame arranged on a side opposite to a display surface of a display panel. The lower frame includes a bottom wall portion, and a side wall portion that is formed so as to surround the bottom wall portion at an edge thereof. The display device also includes a plurality of light sources arranged along the side wall portion of the lower frame and a heat sink configured to dissipate heat generated from the plurality of light sources. The heat sink includes a plurality of groove portions that are formed along the bottom wall portion in a direction extending from the plurality of light sources.