Organic Light-Emitting Display Panel Touch Interference Reduction
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Solution Overview
Problem
Existing organic light-emitting display panels face challenges in achieving high-frequency display without interfering with touch functions, as the time required for data writing into driving transistors becomes shorter, making time-division operation between touch and display driving increasingly difficult.
Innovation Solution
The implementation of an organic light-emitting display panel with a scanning driving circuit, a light-emitting driving circuit, and a data driving circuit that allows for simultaneous touch and display driving by maintaining a fixed number of light-emitting pixel-rows during touch signal transmission, thereby stabilizing voltage drop and reducing interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If time-division manner is used for touch and display driving, then interference between touch and display is reduced, but data writing time becomes insufficient for high-frequency display
Solution Approach 1:
The patent segments the frame period into multiple sub-periods including display area scanning duration, front porch duration, and back porch duration. By further dividing the front-back porch duration into multiple touch durations, the system enables simultaneous touch and display driving in different time segments, resolving the contradiction between interference reduction and data writing speed for high-frequency display
Solution Approach 2:
The patent dynamically adjusts the number of light-emitting pixel-rows (M1) during touch durations to remain unchanged, while allowing other parameters to vary. This dynamic control enables the system to maintain stable voltage drop during touch operations while ensuring sufficient data writing time for high-frequency display requirements
2Productivity
If high-frequency display is implemented, then display refresh rate increases, but touch function interference increases
Solution Approach 1:
The patent implements periodic touch durations within the frame period where the number of light-emitting pixel-rows remains unchanged. This periodic action pattern allows touch driving to occur at specific intervals without continuously interfering with high-frequency display operations, enabling both high refresh rates and stable touch function
Solution Approach 2:
The patent changes the parameter of light-emitting pixel-rows (M1) to remain unchanged during touch durations, while other parameters such as scanning duration and data writing time are adjusted. This parameter change strategy reduces parasitic capacitance and interference, enabling high-frequency display without affecting touch function
3Manufacturing precision
If data writing time is increased, then display quality improves, but frame period becomes insufficient for high-frequency operation
Solution Approach 1:
The patent performs preliminary data writing to driving transistors during the display area scanning duration before the touch durations occur. This preliminary action ensures that data is written in advance with sufficient time, improving display quality while maintaining the frame period for high-frequency operation
Solution Approach 2:
The patent ensures continuous useful action by overlapping display scanning and touch driving operations in different time segments within the same frame period. The display area scanning duration and front-back porch duration are utilized continuously without idle time, enabling both high display quality and high-frequency operation
Data Source
AI summary
An organic light-emitting display panel and a method for driving the same, and a display device are provided. The organic light-emitting display panel includes a light-emitting driving circuit and a touch signal driving circuit. The light-emitting driving circuit is configured to provide, within a scanning duration of each frame, a light-emitting control signal having b1 light-emitting cycles and a duty cycle of a1 to each row of pixels. A display area scanning duration includes at least one touch duration during which the touch signal driving circuit provides a touch signal to the display panel and the number of rows of the light-emitting pixel-rows of the display panel remains unchanged.