Staggered Display Emission Control for Touch Sensing Accuracy
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Solution Overview
Problem
Current display devices face challenges in allocating sufficient time for touch sensing, which affects the accuracy of touch input detection and can lead to display quality deterioration due to overlapping touch sensing periods with display emission periods.
Innovation Solution
The display device incorporates a method where emission control signals are sequentially supplied with a predetermined time difference across different areas of the panel, allowing for an inter-frame pause touch sensing period within the frame period, thereby improving touch accuracy and preventing display quality deterioration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If touch sensing period is extended to improve touch detection accuracy, then touch sensing accuracy is improved, but display emission time is reduced
Solution Approach 1:
The display panel is divided into first pixels and second pixels located in different areas, with different emission control timings. First pixels receive data signals after a first time delay from emission control signal, while second pixels receive data signals after a second time delay, creating staggered emission periods that enable touch sensing during emission intervals.
2Measurement precision
If touch sensing period overlaps with display emission period to increase touch sensing time, then touch sensing accuracy is improved, but display quality deteriorates
Solution Approach 1:
The display device implements periodic emission cycles where pixels are turned on and off in alternating patterns. During periods when first pixels are emitting, second pixels are in data reception mode and vice versa, creating periodic intervals where touch sensing can occur without interfering with display emission quality.
Data Source
AI summary
Provided is a display device including first pixels positioned in a first area of a panel for receiving a first data signal from a data line in response to a first scan signal supplied from a first scan line and having an emission time controlled according to a first emission control signal, and second pixel positioned in a second area of the panel for receiving a second data signal from the data line in response to a second scan signal supplied from a second scan line and having an emission time controlled by a second emission control signal. The first pixels receive the first data signal after a first time after the first emission control signal is supplied, and the second pixels receive the second data signal after a second time, which is different from the first time, after the second emission control signal is supplied.