Cover-Integrated Power Supply for Stable Large Display Panels
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Solution Overview
Problem
Large-scale display devices face challenges in providing a stable electrical power supply, leading to heat emission and quality degradation, and require additional power cables which increase complexity and cost.
Innovation Solution
The display device configuration includes a metal encap area in the cover that supplies electrical power to the non-pad area of the panel, eliminating the need for secondary power cables and reducing heat emission by applying power through a common electrode.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If additional power cables or lines are used to apply secondary electrical power, then stable power supply is achieved, but device complexity and manufacturing cost increase
Solution Approach 1:
The patent combines the power transmission function with the existing touch sensor electrode structure. The touch sensor electrode serves dual purposes: as a touch detection element and as a power transmission conductor. This eliminates the need for separate power cables while maintaining stable power supply to the display panel.
Solution Approach 2:
The touch sensor electrode is designed to perform multiple functions simultaneously: touch sensing and power transmission. By making the electrode structure universal for both touch interaction and electrical power delivery, the patent reduces the number of separate components needed in the system.
2Reliability
If secondary electrical power is applied through source board, then stable power supply is achieved, but heat emission increases affecting display quality
Solution Approach 1:
The patent extracts the power transmission path from the source board and redistributes it through the touch sensor electrode network across the display. This separates the power delivery function from the source board, reducing heat concentration at any single location and improving overall thermal distribution.
Solution Approach 2:
The power transmission is segmented into multiple paths through the touch sensor electrode grid rather than concentrating current through the source board. This segmentation distributes the electrical load and resulting heat generation across multiple discrete electrode segments, reducing thermal impact on display quality.
3Device complexity
If touch sensor electrode structure is used for power transmission, then device complexity is reduced, but electrical power transmission capability must be enhanced
Solution Approach 1:
The patent employs composite electrode structures with enhanced electrical properties, combining conductive materials optimized for both touch sensing and power transmission. The electrode material composition is designed to provide sufficient electrical conductivity for power delivery while maintaining touch sensitivity.
Solution Approach 2:
The electrode design parameters are optimized to enhance power transmission capability, including adjusting electrode width, spacing, and conductivity. By changing these physical parameters, the electrode structure achieves adequate electrical power transmission while maintaining its touch sensing function.
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 ensures a stable and robust power supply, reduces manufacturing costs, and minimizes heat-related issues, while simplifying the panel design and eliminating the need for additional power cables.
Implementation Method 1
a metal encap area in the cover, and the electrical power is applied to the non-pad area of the panel through the metal encap area using a common electrode
Data Source
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AI summary
Various embodiments provide a display device, comprising: a display panel (110) having a display area (370), in which a plurality of pixels (P) and at least one power line for supplying power to the pixels (P) are formed, and a non-display area outside the display area (370); and a cover disposed over the display panel (110) so as to cover the display area of the display panel (110), wherein the cover comprises at least one electrically conductive portion (310; 1010; 1110; 1220; 1310, 1320) coupled to the at least one power line and configured to receive at least one power supply voltage via the non-display area and supply the at least one power supply voltage to the at least one power line in the display area (370).