Driving Circuit with Timed Shared Sensing 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 a shared sensing channel for adjacent pixels, utilizing a sampling switch turned on at different times for each pixel to generate and store sensing data, and a timing controller to convert input data based on this data, thereby controlling the sampling time to minimize 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 performing sensing operations in a specific sequence: first sensing period for initially sensed pixels, then second sensing period for subsequently sensed pixels. The sampling switch is turned on at different times for each period to capture pixel characteristics at different moments, allowing the system to pre-compensate for the inherent timing-related variations before final image processing occurs.
Solution Approach 2:
The patent changes the sampling time parameter differently for the first and second sensing periods. By adjusting when the sampling switch is turned on relative to the sensing operation in each period, the system captures different characteristic values from pixels. This parameter variation allows the multiplexer-based sensing component to maintain image uniformity despite the inherent differences between initially and subsequently sensed pixels.
2Productivity
If pixels are sensed at different times using a shared sensing channel, then productivity is improved, but measurement precision deteriorates due to characteristic deviations between pixels sensed at different times
Solution Approach 1:
The patent implements periodic action by dividing the sensing operation into distinct first and second sensing periods. During each period, pixels are sensed systematically with the sampling switch turned on at specific times. This periodic structure allows the system to maintain high productivity through efficient time-multiplexed sensing while ensuring measurement precision by accounting for characteristic deviations through controlled sampling timing in each period.
Solution Approach 2:
The system performs preliminary sensing operations in the first sensing period to establish baseline characteristics, then uses the second sensing period to capture subsequent pixel data with adjusted sampling timing. This preliminary action approach allows efficient periodic sensing while maintaining precision by comparing and compensating for characteristic deviations between periods.
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.