Display Panel Driving for Under-Screen Camera Brightness
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Solution Overview
Problem
The challenge is to increase the screen-to-body ratio of display panels while maintaining uniform brightness, as the reduction in pixel density for under-screen cameras leads to noticeable dark areas and affects the overall visual effect.
Innovation Solution
The method involves a display panel with two areas: a first display area with a lower pixel density for transparency and a second area with a higher pixel density for normal display, using dummy pixels and specific sub-pixel arrangements to adjust color gamut data and drive signals, ensuring uniform brightness across the screen.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the pixel density is reduced in the first display area to enable under-screen camera placement, then the screen-to-body ratio is improved, but the brightness uniformity deteriorates causing noticeable dark areas
Solution Approach 1:
The patent applies local quality by differentiating the display characteristics of the first display area (with under-screen camera) from the second display area (without camera). The first area uses a first color gamut optimized for transparency and camera visibility, while the second area uses a second color gamut optimized for display brightness. This allows each region to have properties suited to its specific function, resolving the contradiction between screen-to-body ratio and brightness uniformity.
Solution Approach 2:
The patent changes the color gamut parameter between different display areas. The processing circuitry converts image data from a first color gamut (for the transparent area with camera) to a second color gamut (for the normal display area). This parameter change enables the first area to maintain lower pixel density for camera integration while the second area maintains higher brightness, thus resolving the brightness uniformity issue while achieving high screen-to-body ratio.
2Illumination intensity
If dummy pixels are added to the first display area to improve brightness, then the brightness uniformity is improved, but the device complexity increases
Solution Approach 1:
The patent makes the processing circuitry universal by enabling it to perform multiple functions: color space conversion, brightness adjustment, and coordination of dummy pixel activation. The circuitry processes image data to generate appropriate drive signals for both the first display area (with dummy pixels) and the second display area, managing the complexity centrally rather than requiring separate control mechanisms for each function.
Data Source
AI summary
Embodiments of the present disclosure provide a method and device for driving a display panel, and a display device. The display panel includes a first display area having a first pixel density and a second display area having a second pixel density, the second pixel density being greater than the first pixel density. The driving method of the display panel comprises receiving first color gamut input data; converting the first color gamut input data corresponding to the first display area into second color gamut intermediate data; converting the second color gamut intermediate data into first color gamut output data; and converting the first color gamut output data into a driving signal that drives the first display area.