Display Device Rear Surface Driving Unit Heat Dissipation
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Solution Overview
Problem
Conventional display devices have a significant dead space area that can lead to degradation of display elements due to heat generated during the mounting of driving units, which affects the overall performance and longevity of the display.
Innovation Solution
The design incorporates a cover portion with heat dissipation layers like copper or graphite on the second surface of the substrate, where the driving units are attached to exposed wires, allowing heat to be dissipated away from the display area, reducing the planar area of dead space and minimizing heat exposure to critical components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If driving units are mounted on the display panel to provide driving signals, then the display device can operate, but heat is generated that degrades display elements
Solution Approach 1:
The patent extracts the driving units from the display panel area and relocates them to the rear surface of the substrate. This separation removes the heat-generating components from proximity to the display elements, thereby preventing thermal degradation while maintaining operational functionality.
Solution Approach 2:
The patent transitions the mounting location of driving units from the front display surface to the rear surface of the substrate, utilizing the third dimension (depth/thickness) to resolve the thermal conflict. This spatial reconfiguration allows heat dissipation away from sensitive display elements.
2Area of stationary object
If driving units are mounted on the display panel, then driving signals can be provided, but the dead space area increases
Solution Approach 1:
By relocating driving units to the rear surface of the substrate, the patent utilizes the unused rear surface area instead of occupying space on the front display panel. This dimensional shift reduces the dead space area on the display surface while preserving the driving signal provision capability.
3Reliability
If wires are connected to signal lines on the substrate, then electrical connection is achieved, but heat exposure to display elements increases
Solution Approach 1:
The patent extracts the wire connections and driving units from the front surface area near display elements and relocates them to the rear surface. This extraction removes the heat exposure pathway to display elements while maintaining the necessary electrical connections through the substrate.
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 the dead space area and prevents degradation of display elements by efficiently dissipating heat away from the display area, thereby enhancing the display device's performance and longevity.
Implementation Method 1
a cover portion on the second surface and corresponding to the light-emitting element on the first surface; a first driving unit on the second surface and electrically connected to the first wire. The first wire includes a portion exposed outside the cover portion
Data Source
AI summary
A display device includes: a substrate including a first surface and a second surface opposing each other; a display element and a signal line on the first surface; a first wire on the second surface and electrically connected to the signal line; a cover portion on the second surface; and a first driving unit on the second surface and electrically connected to the first wire. The first wire includes a portion exposed outside the cover portion, and the first driving unit is connected to the first wire at the portion of the first wire which is exposed outside the cover portion.