Pixel Sensing Initialization in Display Panels to Prevent Light Emission
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Solution Overview
Problem
Display devices face challenges due to varying electrical characteristics among pixels, such as transistors' mobilities and threshold voltages, leading to inconsistent pixel performance, which existing technologies struggle to address effectively.
Innovation Solution
A display device and method that divides rows into groups, applying an initialization data signal through data lines during a blank period to prevent unintended pixel illumination during sensing, using a display driver to acquire sensing data and adjust image signals based on pixel characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If sensing operation is performed during blank period without initialization, then sensing time is reduced, but pixels unintentionally emit light during sensing
Solution Approach 1:
The patent applies initialization data signals to pixels before sensing operations during the blank period. This preliminary action resets pixel states to prevent unintended light emission while enabling efficient sensing within the same blank period, thus resolving the contradiction between sensing time and unintended light emission.
2Reliability
If initialization data signal is applied to all rows before each sensing, then pixel performance consistency is improved, but signal processing complexity increases
Solution Approach 1:
The patent divides rows into multiple groups and applies initialization data signals to different row groups sequentially before their respective sensing operations. This segmentation approach maintains pixel performance consistency while reducing signal processing complexity compared to initializing all rows before each sensing operation.
Solution Approach 2:
The patent implements periodic initialization of row groups during the blank period, where each row group receives initialization signals at appropriate intervals before sensing. This periodic action ensures consistent pixel performance while managing signal processing complexity through structured timing.
Data Source
AI summary
A display device includes: a display panel including a plurality of pixels and a display driver configured to receive input image data, and display an image The plurality of rows are divided into row groups, and each of the row groups includes at least one row among the plurality of rows. The display driver is configured to, in a blank period different from the display period, while selecting each of the plurality of rows, acquire sensing data associated with pixels of the selected row through the sensing lines, and apply an initialization data signal to the plurality of pixels of the plurality of rows through the data lines before the at least one row of each of the row groups is selected.