Display Driver Sensing Channel Arrangement for Signal Accuracy
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Solution Overview
Problem
In display panels, the non-uniformity of sensing channel hold times leads to gain and offset errors, causing abnormal display due to shared sensing lines and signal converters, which affects the aperture ratio and increases costs and power consumption.
Innovation Solution
A driver design with randomly or alternately arranged sensing channels and signal converters, using switch elements to randomly or sequentially output sensing signals, ensuring consistent hold times and reducing errors by averaging channel performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If multiple sensing channels share one signal convertor sequentially, then device complexity and cost are reduced, but hold time uniformity deteriorates causing gain and offset errors
Solution Approach 1:
The patent implements dynamic hold time adjustment by controlling switch elements to adjust the hold time of each sensing channel based on its position in the sensing matrix. This allows the system to maintain measurement precision while sharing signal convertors, as each channel's hold time is optimized dynamically rather than being fixed and uniform.
Solution Approach 2:
The patent changes the hold time parameter for different sensing channels to compensate for the sequential reading process. By adjusting the hold time parameter according to channel position, the system maintains signal accuracy despite the shared convertor architecture, resolving the contradiction between reduced complexity and maintained precision.
2Area of stationary object
If multiple pixels share one sensing line, then aperture ratio is improved, but sensing signal uniformity deteriorates
Solution Approach 1:
The patent applies local quality by assigning different hold time characteristics to different sensing channels based on their specific positions in the sensing matrix. This allows each channel to be optimized for its local characteristics, maintaining sensing signal uniformity even when multiple pixels share sensing lines, thus resolving the contradiction between aperture ratio and signal uniformity.
3Device complexity
If sensing channels are arranged sequentially to match sensing lines, then device complexity is reduced, but display uniformity deteriorates due to non-uniform hold times
Solution Approach 1:
The patent introduces dynamic hold time adjustment that compensates for the sequential arrangement of sensing channels. By dynamically optimizing the hold time for each channel based on its position, the system maintains display uniformity while keeping the device complexity low through sequential arrangement, resolving the contradiction between simplicity and reliability.
Data Source
AI summary
A driver of a display panel is provided. The driver includes a plurality of sensing channels configured to receive a plurality of sensing signals from the display panel via a plurality of sensing lines and output the sensing signals, the sensing channels are coupled to the sensing lines in an arrangement selected from one of a random arrangement and a normal arrangement. The driver further includes a signal convertor coupled to the sensing channels and configured to receive the sensing signals from the sensing channels in a sequence selected from one of a random sequence and a normal sequence.