Display Electrode Configuration for Touch and Hover Detection
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Solution Overview
Problem
Existing touch detection systems face challenges in accurately performing hover detection due to differences in detection distance and resolution requirements between touch and hover detection, often resulting in complex configurations when using the same electrodes for both functions.
Innovation Solution
A display apparatus with separate electrodes and drive circuits for touch and hover detection, including first electrodes in the display area, second electrodes on the surface of the second substrate, third electrodes in the frame area, and a drive circuit that supplies distinct drive signals to these electrodes to facilitate accurate touch and hover detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the same electrodes and drive configuration are used for both touch detection and hover detection, then device complexity is reduced, but hover detection accuracy deteriorates due to different detection distance and resolution requirements
Solution Approach 1:
The patent divides the detection system into separate functional components: first electrodes for touch detection in the display area, second electrodes for hover detection in the frame area, and third electrodes as additional hover detection electrodes. This segmentation allows each electrode type to be optimized for its specific detection function, resolving the contradiction between using a unified simple configuration and achieving function-specific accuracy.
Solution Approach 2:
The patent implements multi-functionality by enabling the same physical electrodes to serve multiple purposes through different drive signal configurations. The drive circuit can supply different drive signals to the same electrodes for different detection modes (touch vs. hover), allowing the electrodes to be universal while maintaining function-specific performance through signal differentiation.
2Measurement precision
If separate detection electrodes and drive electrodes are provided for touch detection and hover detection, then hover detection accuracy is improved, but device complexity increases
Solution Approach 1:
The patent merges the electrode structures by providing first, second, and third electrodes that can be collectively driven by the drive circuit. Instead of completely separate electrode systems, the patent combines them into a unified electrode structure where the drive circuit selectively activates different electrode combinations for different detection functions, achieving both accuracy and simplified configuration.
Solution Approach 2:
The patent introduces dynamic control through the drive circuit that can supply different drive signals to different electrodes based on the detection mode required. This dynamic switching capability allows the static electrode structure to adapt its functional configuration in real-time, enabling accurate hover detection without requiring permanently separate fixed configurations.
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 allows for precise touch and hover detection while simplifying the system by using the same electrodes for both functions, enhancing detection accuracy and reducing complexity.
Implementation Method 1
a drive circuit that supplies a first drive signal to at least one of the first electrodes and the second electrodes
Implementation Method 2
the second electrodes facing the first electrodes, third electrodes provided in a frame area on an outer side of the display area
Data Source
AI summary
A display apparatus includes a first substrate, a second substrate, a display functional layer, first electrodes, second electrodes, third electrodes, and a drive circuit. The second substrate faces the first substrate. The display functional layer is provided between the first substrate and the second substrate and used to display an image in a display area. The first electrodes are provided in the display area between the first substrate and the second substrate. The second electrodes are provided, facing the first electrodes, in the display area on the surface of the second substrate. The third electrodes are provided in a frame area on the outer side of the display area. The drive circuit supplies a first drive signal to at least one of the first electrodes and the second electrodes.