Touch Device Dynamic Sensing Period Synchronization
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Solution Overview
Problem
Existing touch devices face challenges in wireless communication due to the interference between display driving operations and touch sensing operations, leading to failed communication between devices equipped with display panels, as the timing of touch sensing periods often do not match, resulting in inefficient data transfer.
Innovation Solution
The implementation of a touch device with a controller that dynamically adjusts the time length of touch sensing periods, allowing for extended touch sensing periods during communication mode to synchronize with other devices, utilizing the display panel's touch transmission and receiving electrodes to emit and receive frequency signals for communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the display panel performs display driving operation and touch sensing operation in separate time periods, then the display function and touch sensing function can be maintained, but the wireless communication function cannot be implemented effectively due to timing mismatch
Solution Approach 1:
The patent dynamically adjusts the touch sensing period timing based on communication mode. When communication is needed, the controller extends the touch sensing period to overlap with the display frame period, allowing the display panel to serve as a communication channel while maintaining touch sensing capability. This dynamic timing adjustment enables the system to adapt between display-only mode and communication-enabled mode.
Solution Approach 2:
The display panel is made multi-functional by enabling it to perform display driving, touch sensing, and wireless communication simultaneously. The touch transmission electrode and touch receiving electrode are reused as communication transmission and receiving antennas, eliminating the need for separate communication hardware and enabling the display panel to serve multiple purposes.
2Productivity
If the touch sensing period is extended to enable communication, then communication timing can be synchronized, but the display driving operation may be interfered with
Solution Approach 1:
The display frame period is segmented into multiple sub-periods, including a first sub-period for display driving and a second sub-period for touch sensing and communication. By dividing the operation timeline into distinct segments with specific functions, the system can perform display driving and communication in an organized manner without mutual interference.
Solution Approach 2:
The patent implements periodic communication operations within the display frame structure. The touch sensing period is periodically extended to overlap with specific portions of the display frame period, creating a rhythmic pattern of communication opportunities that maintains display stability while enabling data transfer.
Data Source
AI summary
The invention provides a touch device and a communication method thereof. The touch device includes a display panel and a controller. The controller controls the display panel to perform a display driving operation and a touch sensing operation. The controller may transmit a first wireless signal to another slave communication device via the display panel in a touch sensing period. The controller may receive a second wireless signal sent by another master communication device via the display panel in the touch sensing period. When the touch device serves as one of a master communication device and a slave communication device, a time length of the touch sensing period is a first time length. When the touch device serves as the other of the master communication device and the slave communication device, the time length of the touch sensing period is a second time length greater than the first time length.