Shared-Sensing Display Driving Circuit for Pixel Uniformity
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Solution Overview
Problem
Display devices experience uneven image display due to differences in characteristics between initially sensed and subsequently sensed pixels, particularly when a multiplexer is included in the sensing component.
Innovation Solution
A driving circuit with a sensing component that includes shared sensing channels for adjacent pixels, utilizing a sampling switch with controlled turn-on times during different sensing periods to generate and store sensing data, and a timing controller to convert input data based on this data, thereby minimizing characteristic deviations between pixels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a multiplexer is included in the sensing component to share sensing channels between pixels, then device complexity is reduced, but uneven image display occurs due to characteristic differences between initially sensed and subsequently sensed pixels
Solution Approach 1:
The patent applies preliminary action by adjusting the turn-on time of the sampling switch before sensing operations begin. Specifically, an additional turn-on time is provided to the sampling switch for the second sub-sensing line compared to the first sub-sensing line, compensating for the inherent delay in sensing subsequent pixels. This preliminary timing adjustment ensures that all pixels are sensed within a uniform time window, eliminating the uneven image display caused by sequential sensing delays while maintaining the multiplexer-based shared sensing channel structure.
2Device complexity
If pixels are sensed sequentially through shared sensing channels, then device complexity is reduced, but sensing time variation occurs between different pixels
Solution Approach 1:
The patent applies parameter changes by modifying the turn-on time parameter of the sampling switch for different sub-sensing lines. The sampling switch is configured with different turn-on times for the first and second sub-sensing lines, creating a time offset that compensates for the sequential sensing delay. This parameter adjustment equalizes the effective sensing time across all pixels using shared channels, eliminating sensing time variation without requiring separate sensing channels for each pixel.
Data Source
AI summary
A driving circuit includes a sensing component including a sensing channel shared by a first sub-sensing line connected to a first pixel and a second sub-sensing line connected to a second pixel, and a timing controller that converts input data supplied from an external device in response to sensing data supplied from the sensing component, and generates output data. The sensing component further includes a sampling line that receives a first sensing voltage from the first sub-sensing line and a second sensing voltage from the second sub-sensing line, and a sampling switch connected between the sampling line and the first and second sub-sensing lines. The sampling switch is turned on during a first time the first sensing voltage is supplied to the sampling line, and is turned on during a second time different from the first time the second sensing voltage is supplied to the sampling line.