Display Device Heatsink for LED and COG Thermal Management
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Solution Overview
Problem
Existing display devices face challenges with heat dissipation, particularly in edge-lit backlights where LEDs can overheat, leading to unstable lighting and uneven brightness, and in COG display devices where heat accumulation shortens the service life of driving components and affects display quality.
Innovation Solution
A display device configuration that includes a heatsink with a display panel overlapping portion, a light source overlapping portion, and a connecting portion, where the heatsink extends to the rear surface of the display panel to efficiently dissipate heat generated by both the driving component and the light source, improving overall heat dissipation performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If edge-lit backlight is used to reduce thickness, then thickness is reduced, but LEDs concentrate in local area causing excessive heat and unstable lighting
Solution Approach 1:
A heat dissipation sheet is introduced as an intermediary component between the driving component and the backlight unit. This sheet has a first region extending in the light emission direction and a second region extending in the direction opposite to the light emission direction, creating a heat dissipation path that redirects heat away from the LEDs while maintaining the edge-lit backlight's thin profile.
2Weight of moving object
If driving component is mounted on substrate by COG technology, then device size and weight are reduced, but heat accumulation shortens service life and affects display quality
Solution Approach 1:
The heat dissipation sheet is segmented into distinct functional regions: a first region extending in the light emission direction to manage heat from the driving component, and a second region extending in the opposite direction to manage heat from the backlight. This segmentation allows targeted heat management for each heat source while maintaining overall device compactness.
3Productivity
If number of LEDs and driving component load increase, then display resolution and driving speed improve, but heat generation increases requiring better heat dissipation
Solution Approach 1:
The heat dissipation sheet extends in multiple directions (both in the light emission direction and opposite to it), creating a three-dimensional heat dissipation structure. This dimensional approach allows heat to be dissipated in multiple paths simultaneously, effectively managing heat from increased LED count and higher driving component loads without compromising display performance.
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 configuration effectively reduces temperature increases in the display device, enhancing heat dissipation and maintaining display quality by diffusing and dissipating heat generated by both the driving component and light source through a single heatsink, thereby improving the reliability and longevity of the device.
Implementation Method 1
The heatsink includes a display panel overlapping portion, a light source overlapping portion, and a connecting portion... effectively reduces temperature increases in the display device, enhancing heat dissipation
Data Source
AI summary
A display device includes a display panel and a backlight. The display panel includes a first substrate, a second substrate, and a heatsink. The first substrate includes a second substrate non-overlapping portion on which the second substrate is not disposed but a driving component is disposed. The backlight includes a light guide plate and a light source. The light source emits light toward an end surface of the light guide plate. The heatsink includes a display panel overlapping portion, a light source overlapping portion, and a connecting portion. The display panel overlapping portion is on a rear surface of the first substrate at least over an area corresponding to the driving component. The light source overlapping portion is on a side of the backlight remote from the display panel. The connecting portion connects the display panel overlapping portion and the light source overlapping portion to each other.