Touch Substrate Channel Reuse for Regional Touch Sensing
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Solution Overview
Problem
The increasing number of secondary touch electrodes in touch screens leads to a proportional increase in the number of signal channels required for the driving chip, resulting in higher production costs due to the need for additional bonding terminals and dedicated signal channels.
Innovation Solution
The reuse of primary touch signal channels as secondary touch signal channels, reducing the need for additional bonding terminals and dedicated channels for the driving chip, thereby minimizing production costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If secondary touch electrodes are added to provide regional touch functions, then touch functionality is improved, but the number of signal channels and bonding terminals increases leading to higher costs
Solution Approach 1:
The patent makes primary touch signal channels serve dual purposes by reusing them as secondary touch signal channels. The same signal channels that transmit touch signals to primary touch electrodes are also used to transmit touch signals to secondary touch electrodes, allowing one channel to perform multiple functions and eliminating the need for separate dedicated channels for secondary touch regions.
Solution Approach 2:
The patent merges the signal channel resources for primary and secondary touch electrodes. Instead of having separate signal channels for primary touch electrodes and secondary touch electrodes, the patent combines them by having secondary touch electrodes share the signal channels with primary touch electrodes, thereby reducing the total number of signal channels required.
2Adaptability or versatility
If secondary bonding terminals are added for secondary touch electrodes, then regional touch functions are enabled, but production cost increases
Solution Approach 1:
The patent makes existing bonding terminals multi-functional by having them serve both primary touch electrodes and secondary touch electrodes. The bonding terminals that originally connected to primary touch electrodes are also used to connect to secondary touch electrodes through the reused signal channels, eliminating the need for additional dedicated bonding terminals for secondary touch functions.
Solution Approach 2:
The patent combines the bonding terminal resources for primary and secondary touch electrodes. Instead of having separate bonding terminals for primary and secondary touch electrodes, the patent merges them by having secondary touch electrodes share the bonding terminals with primary touch electrodes through the reused signal channels, thereby reducing the total number of bonding terminals required.
Data Source
AI summary
A touch substrate, a method for forming the same and a touch display device are provided. The touch substrate includes: a primary touch region, a secondary touch region, a peripheral region, primary touch electrodes at the primary touch region, secondary touch electrodes at the secondary touch region, a plurality of bonding terminals, a plurality of primary touch signal channels and a plurality of secondary touch signal channels configured to transmit touch signals to the secondary touch electrodes at the peripheral region, where each bonding terminal is coupled to a corresponding primary touch electrode via a signal transmission line, and configured to provide the primary touch signal channel to transmit the touch signal to the corresponding primary touch electrode, where at least a part of the primary touch signal channels is reused as the secondary touch signal channels.