Touch Display Panel With Floating Electrodes for Edge Pattern Compensation
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Solution Overview
Problem
The integrity of the electrode pattern at the edge of a touch panel is compromised due to factors such as screen display region size, pixel size, and through holes, affecting touch performance.
Innovation Solution
A touch display panel design that includes a base substrate with a touch metal layer featuring touch patterns and traces, where missing regions in the patterns are compensated by integrally connecting floating electrodes with pattern sub-blocks to enhance the self-capacitance and optimize electrical parameters, particularly at the edges and corners.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the electrode pattern is arranged in the display region, then the touch detection coverage is improved, but the pattern integrity is compromised at the edges
Solution Approach 1:
The patent extends the electrode pattern into the peripheral region beyond the display region boundary. This spatial extension allows the pattern to maintain its integrity and electrical parameters by utilizing the extra dimension (peripheral region) to compensate for the incomplete pattern that would otherwise result from confining electrodes strictly within the display region.
Solution Approach 2:
The patent pre-compensates for the pattern integrity issue by deliberately designing extended patterns in the peripheral region before any touch detection occurs. The extended pattern structure is built in advance to ensure that even when the display region boundaries truncate the pattern, the essential electrical characteristics and touch detection functionality are preserved.
2Area of stationary object
If the screen display region size is increased, then the display area is improved, but the electrode pattern completeness at edges is reduced
Solution Approach 1:
The patent utilizes the peripheral region (an additional spatial dimension beyond the display region) to house extended electrode patterns. This allows the display area to be maximized while the pattern completeness is maintained in the extended peripheral area, effectively decoupling the display area size from the pattern integrity constraint.
3Adaptability or versatility
If through holes are added to the display region, then the display functionality is improved, but the electrode pattern continuity is disrupted
Solution Approach 1:
The patent introduces extended patterns in the peripheral region as intermediary structures that compensate for the discontinuities caused by through holes. These extended patterns act as mediators that maintain the overall electrical continuity and touch detection functionality even when through holes interrupt the pattern within the display region.
Data Source
AI summary
The present disclosure provides a touch display panel and a display device. The touch display panel comprises: a base substrate, comprising a display region and a peripheral region surrounding the display region; and a touch metal layer, comprising touch patterns at least partially of which is in the display region, and touch traces in the peripheral region; wherein: each of the touch pattern comprises a plurality of pattern sub-blocks; at least one floating electrode is provided in each of the plurality of pattern sub-block; a touch pattern, of the touch patterns, with a partial missing region is regarded as a missing touch pattern; and in a pattern sub-block where the missing region is located, the at least one floating electrode is integrally and electrically connected with the pattern sub-block.