Touch Display Apparatus Chip Reduction via Electrode Overlap
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Solution Overview
Problem
The high cost and increased manufacturing costs of large-sized touch display apparatuses due to the high number of chips required for calculating touch positions, which makes it difficult to reduce the peripheral region area for chip arrangement.
Innovation Solution
A touch display apparatus design that reduces the number of chips needed by utilizing a substrate with a display region and a peripheral region, where the first and second active devices, switch devices, and pixel electrodes are strategically arranged to allow the touch electrode to overlap with the pixel electrodes, enabling the use of multiplexers to control touch signals, thereby reducing the chip count and area requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the number of touch electrodes and chips is increased to meet market requirements for larger display sizes, then the touch functionality is improved, but the manufacturing cost increases and the peripheral region area for chip arrangement cannot be reduced
Solution Approach 1:
The patent applies multi-functionality by enabling the touch electrode to serve dual purposes: it functions as both a touch sensing electrode and a signal transmission line. This integration allows the touch electrode to replace dedicated transmission lines, thereby reducing the number of separate chips needed for signal processing and lowering overall device complexity while maintaining touch functionality.
Solution Approach 2:
The patent merges the touch electrode with the signal transmission function by allowing the touch electrode to overlap with and function as a transmission line. This combining of functions reduces the number of separate components (chips) required, directly addressing the technical contradiction between maintaining touch functionality and reducing device complexity.
2Measurement precision
If more chips are arranged in the peripheral region to handle increased touch calculations, then touch position calculation accuracy is improved, but the peripheral region area increases and manufacturing cost increases
Solution Approach 1:
The touch electrode is designed to perform multiple functions simultaneously: it acts as both a touch sensing element and a signal transmission line. This multi-functionality eliminates the need for separate chips dedicated to signal transmission, thereby maintaining touch position calculation accuracy while reducing the peripheral region area required for chip arrangement.
Solution Approach 2:
The patent extracts the transmission line function from separate chips and integrates it directly into the touch electrode structure. By taking out the dedicated transmission line components and merging their function into the existing touch electrode, the peripheral region area is reduced while maintaining the necessary signal processing capabilities for accurate touch position calculation.
3Ease of manufacture
If the number of chips is reduced to lower manufacturing cost, then manufacturing cost is reduced, but the ability to calculate touch positions may be compromised
Solution Approach 1:
The touch electrode is designed to perform multiple functions simultaneously: touch sensing and signal transmission. This multi-functionality allows the system to maintain accurate touch position calculation capability with fewer chips, directly reducing manufacturing cost while preserving measurement precision.
Solution Approach 2:
The touch electrode serves itself by functioning as both the sensing element and the transmission line. This self-service approach eliminates the need for separate dedicated transmission lines and reduces dependency on additional chips, thereby lowering manufacturing cost while maintaining the system's ability to accurately calculate touch positions.
Data Source
AI summary
A touch display apparatus includes a first transmission line, first and second signal lines, a touch signal line, a control signal line, first and second active devices, a first switch device, first and second pixel electrodes and a touch electrode. The first signal line is parallel and adjacent to the second signal line. The first active device is electrically connected to the first transmission line and the first signal line. The second active device is electrically connected to the first transmission line and the second signal line. The first switch device is electrically connected to the touch signal line and the control signal line. The first and second pixel electrodes are electrically connected to the first and second active devices respectively. The first and second pixel electrodes are not located between the first and second signal lines.