Touch Driving Circuit Pen Data Merging
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Solution Overview
Problem
Touch display devices face challenges in efficiently processing and transmitting large amounts of pen data due to the characteristics of pen output signals, leading to delayed recognition of pen inputs, especially as the resolution and size of touch displays increase, and the number of touch driving circuits grows, requiring a method to reduce data volume and maintain functionality without altering the touch controller.
Innovation Solution
A touch driving circuit and method that generate summation sensing data by performing range conversion and merging of sensing data from multiple touch electrodes, reducing the number of bits and efficiently transmitting data with a narrow bandwidth, allowing for accurate pen data recognition without increasing the touch controller's complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the number of touch driving circuits increases to handle higher resolution and larger size touch displays, then the touch display device can provide better display quality and larger coverage, but the amount of sensing data increases significantly, making it difficult to transmit and process the data within the designated touch period
Solution Approach 1:
The patent merges sensing data from multiple touch electrodes by grouping them into sets and performing binary summation on sensing data of the same bit value from different electrodes. This consolidation reduces the total data volume transmitted from multiple touch driving circuits, enabling efficient data handling within the touch period while maintaining high resolution capability
Solution Approach 2:
The patent changes the data representation parameter by performing range conversion that removes predetermined lower bits from sensing data while merging data from multiple electrodes. This parameter transformation reduces the bit width of transmitted data without significantly impacting pen data recognition accuracy, thus reducing transmission time while maintaining measurement precision
2Adaptability or versatility
If the amount of pen information transmitted from the pen to the display device increases to provide more functions, then the pen touch functionality becomes more elaborate, but the transmission time increases significantly and the data may not be transmitted within the limited period
Solution Approach 1:
The patent extracts and transmits only the essential pen data information by performing range conversion that removes lower bits from sensing data. This extraction approach allows the system to maintain elaborate pen touch functionality while transmitting only the critical data elements needed for pen recognition, thus reducing transmission time within the limited period
Solution Approach 2:
The patent combines sensing data from multiple touch electrodes through binary summation and merging operations. This consolidation reduces the overall data transmission requirement, enabling the system to support multiple pen functions while transmitting reduced data volume within the designated time frame
3Area of stationary object
If the number of touch driving circuits increases to handle larger touch displays, then the touch display coverage increases, but the touch controller cannot receive data from all touch driving circuits without increasing its complexity
Solution Approach 1:
The patent merges sensing data from multiple touch driving circuits by performing binary summation on sensing data of the same bit value. This data consolidation approach allows a single touch controller to receive and process data from multiple touch driving circuits without increasing controller complexity, as the merged data from multiple electrodes is aggregated into reduced data sets that can be handled by the existing controller architecture
Solution Approach 2:
The patent applies range conversion to reduce the bit width of sensing data before transmission to the touch controller. This parameter change reduces the data processing burden on the touch controller, enabling it to handle data from multiple touch driving circuits for large touch displays without increasing controller complexity
Data Source
AI summary
The present disclosure provides a touch driving circuit, a touch display device, and a pen data recognition method by a touch circuit, and the touch circuit supplies a touch driving signal to two or more touch electrodes from among the plurality of touch electrodes in a pen data mode, generates sensing data for recognizing pen data which is transmitted from an active pen via the two or more touch electrodes in response to the touch driving signal, and performs range conversion and merger of two or more pieces of sensing data generated by detecting the pen data of same bit value, so as to generate summation sensing data.