Display System Pixel Degradation Sensing Segmentation
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Solution Overview
Problem
Display devices experience degradation over time, leading to delays in image display due to the sensing of pixel degradation information, particularly when the device is turned on and before displaying an image.
Innovation Solution
A display system with a sensing circuit that separates pixel degradation sensing into two areas - one for the logo area and another for the normal image area, allowing for power management and data storage of degradation information to minimize delays by performing these tasks before and after displaying specific images.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the sensing circuit senses degradation information of all pixels before displaying an image, then the image quality is improved through compensation, but the image display delay increases
Solution Approach 1:
The patent divides the pixel array into multiple sensing areas (e.g., first sensing area, second sensing area, third sensing area) and performs degradation sensing on different areas at different times. The logo area pixels are sensed first before image display, while other areas are sensed after logo display but before normal image display. This segmentation allows parallel processing and reduces overall sensing time, thereby reducing image display delay while maintaining compensation quality.
Solution Approach 2:
The sensing circuit performs degradation sensing on the logo area pixels in advance before the normal image is displayed. By completing the sensing operation for at least part of the pixel array beforehand, the system reduces the critical path delay for image display while still enabling compensation for the most visually significant areas.
2Reliability
If the sensing circuit performs on-sensing before displaying an image, then pixel degradation is detected for compensation, but the processing overhead and time consumption increase
Solution Approach 1:
The patent segments the pixel array into multiple independent sensing zones that can be processed in parallel or sequentially with different priorities. The logo area is segmented as a high-priority zone sensed before image display, while other areas are segmented as lower-priority zones sensed after logo display. This segmentation enables the system to maintain high reliability for critical areas without sacrificing overall processing efficiency.
Solution Approach 2:
The sensing operation is divided into periodic phases: first sensing phase for logo area pixels before image display, and second sensing phase for other area pixels after logo display but before normal image display. This periodic action allows the system to balance reliability requirements with processing efficiency by distributing sensing operations across different time periods.
Data Source
AI summary
A display system includes a display device including a plurality of pixels and a sensing circuit that senses degradation information of the pixels, and a power supply that supplies a power to the display device or stops a supply of the power to the display device. The sensing circuit senses first degradation information of pixels in a first area in which a logo is displayed after the power supply supplies the power to the display device and before the display device displays a logo image including the logo, and senses second degradation information of pixels in a second area other than the first area in a display area after the display device displays the logo image and before the display device displays a normal image not including the logo.