Touch Driving Circuit Pretransmission During Address and Command Signals
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Solution Overview
Problem
Existing touch sensing systems face inefficiencies in communication between the touch driving circuit and the touch controller, affecting the performance and power consumption of the touch sensing system.
Innovation Solution
The touch driving circuit is configured to generate and transmit touch sensing data during periods when the touch controller is transmitting an address or command signal, utilizing a communication start level to initiate data transmission, thereby reducing communication time and power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the touch driving circuit waits for the touch controller to request data before transmitting, then communication protocol simplicity is maintained, but communication efficiency and power consumption are degraded
Solution Approach 1:
The touch driving circuit performs preliminary actions by proactively transmitting touch sensing data to the touch controller before being requested, utilizing the period when the controller transmits address or command signals. This eliminates the need for wait states and requests, thereby improving communication efficiency without significantly increasing protocol complexity
Solution Approach 2:
The patent implements periodic data transmission during specific time windows (when address or command signals are being transmitted), converting the communication pattern from event-driven to time-driven periodic transmission, which improves efficiency by utilizing otherwise idle communication periods
2Loss of time
If the touch driving circuit transmits data during the controller's signal transmission period, then communication time is reduced, but signal interference risk increases
Solution Approach 1:
The patent resolves the timing conflict by utilizing a different communication dimension - transmitting data during the address/command signal transmission period on separate signal lines or using different signal phases. This dimensional separation allows simultaneous transmissions without interference, reducing communication time while maintaining signal reliability
3Use of energy by stationary object
If traditional sequential communication is used, then communication protocol simplicity is maintained, but power consumption increases due to extended communication period
Solution Approach 1:
The patent implements periodic data transmission during specific time windows (when address or command signals are being transmitted), converting the communication pattern from event-driven to time-driven periodic transmission, which improves efficiency by utilizing otherwise idle communication periods
Solution Approach 2:
The touch driving circuit continuously transmits data during the controller's signal transmission periods, eliminating idle wait times and keeping the communication channel continuously productive, thereby reducing overall communication time and power consumption while maintaining operational simplicity
Data Source
AI summary
A touch driving circuit is disclosed that transmits touch sensing data and identifies an address signal and a command signal to determine whether to maintain transmission of touch sensing data during a period while a touch controller transmits an address signal and a command signal to the touch driving circuit according to start of communication between the touch controller and the touch driving circuit. Thus, it is possible to reduce the transmission/reception time of touch sensing data and power consumption of the touch sensing system.