Touch Sensing Display Panel Auxiliary Electrode Sealant Overlap
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Solution Overview
Problem
Conventional in-cell type touch sensing display panels experience uneven film thickness on the inner surface of the color filter substrate, leading to non-uniform cell gaps and poor contact between connecting lines and the array substrate, which affects the normal operation of the touch sensing device.
Innovation Solution
A touch sensing display panel design that includes a first substrate with a touch sensing region surrounded by a sealant region, a patterned electrode layer with connecting lines and an auxiliary electrode on the inner surface, and an insulating layer covering the touch sensing device, where the auxiliary electrode overlaps the sealant to ensure even spacing and uniform film thickness, enhancing contact between the connection pads and the periphery circuit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If connecting lines are disposed on the inner surface of the color filter substrate, then the touch sensing display panel achieves thin thickness, high transmission ratio and simple manufacturing process, but the film thickness becomes uneven and cell gaps become non-uniform
Solution Approach 1:
The patent introduces a sealing member as an intermediary element between the connecting lines and the array substrate. The sealing member has a recess that receives the connecting lines, providing a mediator structure that ensures uniform film thickness and cell gaps while still allowing the connecting lines to be disposed on the inner surface of the color filter substrate. This resolves the contradiction by adding an intermediate structural element that compensates for the unevenness caused by the connecting lines.
2Device complexity
If connecting lines are disposed on the inner surface of the color filter substrate, then the structure is simplified and manufacturing is easier, but the contact between connecting lines and array substrate becomes poor
Solution Approach 1:
The sealing member acts as an intermediary structure that improves contact reliability between the connecting lines and the array substrate. The recess in the sealing member receives the connecting lines, ensuring proper alignment and contact while maintaining the simplified in-cell structure. This mediator structure prevents poor contact issues without adding complex external components.
Solution Approach 2:
The sealing member is disposed before the array substrate, preliminarily positioning the connecting lines in its recess. This preliminary action ensures that the connecting lines are properly aligned and supported before the array substrate is attached, preventing contact issues and ensuring reliable electrical connection.
3Ease of manufacture
If the thickness of films on the inner surface of the color filter substrate varies, then the manufacturing process is simpler, but the cell gaps become uneven and display quality deteriorates
Solution Approach 1:
The sealing member serves as a mediator structure with a recess that receives the connecting lines. This mediator structure compensates for the varying film thickness by providing a standardized interface, ensuring uniform cell gaps and improved display quality while maintaining the simplicity of the in-cell manufacturing process.
Data Source
AI summary
A touch sensing display panel includes a first substrate, a second substrate, a touch sensing device, a patterned electrode layer, an insulating layer, and a sealant. The first substrate has a touch sensing region, and a sealant region surrounding the touch sensing region. The touch sensing device is disposed on an inner surface of the first substrate in the touch sensing region. The patterned electrode layer is disposed on the inner surface of the substrate in the sealant region, and the patterned electrode layer includes a plurality of connecting lines electrically connected to a touch sensing device, and an auxiliary electrode. The auxiliary electrode is not directly electrically connected to the connecting lines and the touch sensing device. The sealant is disposed between the first substrate and the second substrate in the sealant region, and at least one of the connecting lines and the auxiliary electrode overlap the sealant.