Touch Control Display Substrate Signal Line Merging
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Solution Overview
Problem
Existing touch control display substrates require multiple signal lines and a complex manufacturing process, leading to increased wiring, defects, and higher production costs, with potential security risks in applications like automobile-mounted products.
Innovation Solution
A touch control display method and substrate that uses progressive scanning to provide data voltages to pixel electrodes via display signal lines, detecting actual response values and comparing them with standard values to determine touch events, eliminating the need for separate touch control signal lines and improving detection accuracy and efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate touch control signal lines are used in existing embedded touch control display substrates, then touch control functionality can be achieved, but the wiring complexity increases and manufacturing defects increase
Solution Approach 1:
The patent merges the display signal lines and touch control signal lines into a single set of signal lines. The same signal lines that transmit display data to pixel electrodes are also used to transmit touch detection signals, eliminating the need for separate touch control signal lines and reducing wiring complexity while maintaining touch control functionality
Solution Approach 2:
The signal lines are designed to serve dual functions: during display mode, they transmit display data to pixel electrodes, and during touch detection mode, they transmit touch detection signals and receive feedback signals from pixel electrodes. This multi-functionality reduces the overall number of signal lines required in the display substrate
2Adaptability or versatility
If multiple signal lines are used for both display and touch control, then both functions can be implemented, but the manufacturing process becomes more complex and production costs increase
Solution Approach 1:
The patent combines the display and touch control functions into a single integrated substrate with shared signal lines. By merging the signal transmission paths, the number of manufacturing steps is reduced, and the manufacturing process becomes simpler while still achieving both display and touch control functionality
Solution Approach 2:
The signal lines are designed to perform multiple functions - serving as both display data lines and touch control lines. This universality simplifies the manufacturing process by reducing the number of different component types that need to be manufactured and assembled, thereby lowering production costs
3Measurement precision
If progressive scanning is used to provide data voltages to pixel electrodes, then detection accuracy is improved, but detection time increases
Solution Approach 1:
The patent implements periodic switching between display mode and touch detection mode. During touch detection, the system periodically samples the feedback signals from pixel electrodes at specific time points during the progressive scanning process. This periodic sampling approach maintains high detection accuracy by capturing response values at optimal moments while minimizing the overall detection time through efficient timing control
Data Source
AI summary
A touch control display substrate and a touch control display method are provided. The touch control display method includes steps of: providing data voltages to pixel electrodes, respectively, by progressive scanning; detecting actual response values of the pixel electrodes while the data voltages are provided to the pixel electrodes; and comparing the actual response values with respective standard response values, to determine whether a touch has occurred.