Touch-Sensing Display Panel Circuit Layout Optimization
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Solution Overview
Problem
The layout of peripheral circuits in touch-sensing display panels occupies significant space, restricting design options and posing challenges in integrating touch-sensing and display functions effectively.
Innovation Solution
A touch-sensing display panel design that includes a substrate with a display area and a non-display area, featuring connection electrodes, a touch-sensing device layer, a buffer layer, and conductive vias, allowing the touch-sensing device layer to extend into the non-display area and connect with the display device's electrode layers through conductive vias, thereby optimizing circuit layout and reducing thickness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the peripheral circuits of the touch-sensing panel and display panel are arranged considering correlations between circuit board locations and device locations in upper and lower substrates, then the circuit layout can be established, but the overall circuit layout occupies significant space in the panel, restricting design options
Solution Approach 1:
The patent extends electrode layers from the display area into the non-display area of the substrate, utilizing the unused peripheral space in the horizontal dimension. This dimensional extension allows circuit layouts to be distributed more effectively across the substrate area, reducing space occupation in the display region while maintaining manufacturing feasibility.
Solution Approach 2:
The patent divides the substrate into display area and non-display area, and further segments the electrode layers into multiple sections (first electrode layer, second electrode layer, third electrode layer) with different extensions into the non-display area. This segmentation allows independent optimization of circuit layouts in different regions, improving ease of manufacture while controlling overall space usage.
2Adaptability or versatility
If the touch-sensing panel and display panel are integrated on the same substrate, then both functions can be combined, but the integration restricts design options due to space occupation
Solution Approach 1:
The patent segments the integrated panel into distinct functional regions: touch-sensing device layer with its own electrode patterns, display device with separate electrode layers, and non-display area for peripheral circuits. This segmentation allows each function to be optimized independently while maintaining overall integration, reducing design restrictions despite the combined functionality.
Solution Approach 2:
The patent utilizes the non-display area (peripheral region) in the horizontal dimension to accommodate extended electrode layers and peripheral circuits. This dimensional strategy allows the integrated design to expand into unused space rather than competing for display area, thereby maintaining design flexibility while achieving function integration.
3Ease of manufacture
If electrode layers extend from the display area to the non-display area, then connection to connection electrodes through conductive vias can be achieved, but the layout complexity increases
Solution Approach 1:
The patent extends electrode layers into the non-display area in advance, before final connection establishment. This preliminary extension into the peripheral region positions the electrodes optimally for subsequent connection to circuit boards and other components, simplifying the manufacturing process despite increased initial layout complexity.
Solution Approach 2:
The patent introduces conductive vias as intermediary elements that connect the extended electrode layers in the non-display area to the connection electrodes. These vias serve as intermediate connection points, simplifying the overall manufacturing process by providing standardized connection interfaces despite the extended electrode geometry.
Data Source
AI summary
In an embodiment of the disclosure, a touch-sensing display panel includes a substrate, connection electrodes, a touch-sensing device layer, a buffer layer, a display device, and conductive vias. The substrate has a display area and a non-display area connecting the display area. The connection electrodes are located on the non-display area of the substrate. The touch-sensing device layer is located on the substrate. The buffer layer covers the touch-sensing device layer. The display device including a first electrode layer, a second electrode layer, and a display medium layer is disposed on the buffer layer and corresponds to the display area. The first electrode layer and the second electrode layer extend from the display area to the non-display area. The conductive vias penetrate the buffer layer and correspond to the non-display area. The first electrode layer and the second electrode layer are electrically connected to the connection electrodes via the conductive vias.