Non-Rectangular Display Device Electrode Shaping
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Solution Overview
Problem
Conventional display devices with non-rectangular shapes, such as round shapes, face challenges in integrating detection electrodes effectively due to the mismatch between the shape of the display area and the detection electrodes, leading to fitting issues and non-uniform detection capacitance.
Innovation Solution
The display device incorporates detection electrodes shaped in accordance with the display area's shape, using an adhesive layer to bond substrates with drive and detection electrodes arranged at specific intervals, allowing for a narrower frame and improved capacitance uniformity by reducing the need for additional wiring substrates and optimizing electrode connections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If detection electrodes are arranged in a rectangular pattern on a non-rectangular display device, then the frame can be narrowed, but the detection electrodes do not fit the display area shape properly, causing non-uniform detection capacitance
Solution Approach 1:
The detection electrodes are designed with different shapes corresponding to different regions of the display area. Specifically, the detection electrodes in the rounded corner regions are shaped to match the curved geometry, while detection electrodes in the straight edge regions maintain linear shapes. This local adaptation ensures that all detection electrodes uniformly cover their respective display area portions, achieving consistent detection capacitance across the entire non-rectangular display surface while maintaining the narrowed frame design.
2Reliability
If additional wiring substrates are used to connect detection electrodes, then electrode connections can be ensured, but device complexity and manufacturing costs increase
Solution Approach 1:
The patent integrates the detection electrode connections directly into the second substrate structure. The detection electrodes are formed on the same substrate that serves as the display structure, eliminating the need for separate wiring substrates. This merging of functions reduces device complexity and manufacturing steps while maintaining reliable electrical connections between the detection electrodes and the control circuitry through the substrate's existing conductive pathways.
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 enables the display device to maintain effective touch sensing and image display with a narrower frame, reduced costs, and improved signal-to-noise ratio by ensuring proper electrode alignment and capacitance uniformity, even in non-rectangular shapes.
Implementation Method 1
an adhesive layer, wherein the first substrate and the second substrate are bonded to each other with the adhesive layer in between
Data Source
AI summary
According to one embodiment, a display device includes a first substrate, a second substrate and an adhesive layer. The first substrate includes drive electrodes arranged at a first intervals in a first direction. The second substrate is opposed to the first substrate and includes detection electrodes arranged at a second intervals in a second direction perpendicular to the first direction. The adhesive layer bonds the first substrate and the second substrate together. A first detection electrodes of the detection electrodes are shaped in accordance with a shape of a display area which displays an image.