Display Panel Sub-pixel Charging for Under-screen Camera Uniformity
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Solution Overview
Problem
In display panels with under-screen cameras, the reduced pixel density and inconsistent charging efficiencies of sub-pixels in the light-transmitting area lead to noticeable display unevenness (mura), affecting user experience and display quality.
Innovation Solution
A display panel design with a first display area having higher light transmittance than a second area, featuring first pixel units with at least three colors and demultiplexers in the non-display area, where sub-pixels of the same color are electrically connected to signal output terminals with the same charging mode to ensure consistent charging efficiency and avoid brightness differences.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the pixel density of the camera area is reduced to ensure light transmittance, then the light transmittance is improved, but display unevenness (mura) occurs
Solution Approach 1:
The patent applies local quality by differentiating the display area into a first display area with higher light transmittance (for camera functionality) and a second display area with lower light transmittance (for normal display). Within the first display area, sub-pixels are selectively connected to demultiplexer output terminals based on their color and position, creating localized charging mode assignments that optimize both light transmittance and display uniformity in different regions.
Solution Approach 2:
The patent changes the charging mode parameter of signal output terminals based on the color and position of connected sub-pixels. By assigning different charging modes (first charging mode or second charging mode) to different output terminals, the system adjusts the charging characteristics to compensate for variations in light transmittance and pixel density across different areas, thereby reducing display unevenness.
2Area of stationary object
If sub-pixels with different charging modes are used in the same area, then the display coverage is improved, but brightness difference occurs among sub-pixels
Solution Approach 1:
The patent applies local quality by assigning specific charging modes to specific output terminals based on the color and position of sub-pixels. Each output terminal is configured with a predetermined charging mode that matches the requirements of connected sub-pixels, ensuring that sub-pixels of the same color receive consistent charging treatment and maintain uniform brightness.
Solution Approach 2:
The patent ensures equipotentiality in terms of charging efficiency by connecting sub-pixels of the same color to output terminals with the same charging mode. This creates equal charging conditions for sub-pixels of identical color, eliminating brightness differences and ensuring uniform display quality across the display area.
3Illumination intensity
If the first display area has higher light transmittance than the second area, then the camera light transmission is improved, but display unevenness occurs in the first area
Solution Approach 1:
The patent applies local quality by treating the first display area differently from the second area. In the first display area, sub-pixels are selectively connected to demultiplexer output terminals based on their color and position, with specific charging modes assigned to maintain display uniformity. This localized approach allows the area to maintain high light transmittance for camera functionality while compensating for display unevenness through targeted charging mode assignments.
Solution Approach 2:
The patent changes the charging mode parameter of output terminals connected to sub-pixels in the first display area to compensate for the higher light transmittance. By adjusting the charging modes (first charging mode or second charging mode) based on sub-pixel color and position, the system maintains display uniformity despite the optimized light transmission characteristics of the first display area.
Data Source
AI summary
A display panel and a display apparatus. The display panel includes a display area and a non-display area surrounding the display area, the display area includes a first display area and a second display area, and a light transmittance of the first display area is greater than a light transmittance of the second display area; the display panel includes: a plurality of first pixel units, located in the first display area, the first pixel unit includes a plurality of first sub-pixels with at least three colors; a plurality of demultiplexers, located in the non-display area, the demultiplexer includes at least two signal output terminals with different charging modes, and the first sub-pixels with a same color in the first pixel units are electrically connected to the signal output terminals with a same charging mode in the demultiplexers.