Compensation Pixel Layout for Under-Display Camera Color Uniformity
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Solution Overview
Problem
The challenge of achieving full-screen display in mobile devices with front cameras is hindered by the need to accommodate the camera installation, leading to difficulties in realizing a true full-screen design.
Innovation Solution
A display panel with distinct first and second display regions, where the first region has a higher pixel density and includes compensation pixel units to address color differences, and a camera module positioned to face the second region, allowing for a seamless integration of camera functionality within the display.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a front camera is installed in a mobile device, then camera functionality is achieved, but full-screen display is compromised due to the need to accommodate the camera installation
Solution Approach 1:
The front camera module is nested within the display panel structure, specifically positioned in the second display region with light-transmitting units that allow camera light to pass through while maintaining display functionality. The camera is integrated into the display layers rather than being a separate external component, enabling both camera and display to coexist in the same space
Solution Approach 2:
The solution moves the camera integration to a different dimensional layer within the display structure. By utilizing the vertical stacking of display layers (substrate, light-emitting layer, color film layer, black matrix layer, cover), the camera is positioned in a dimensional space that allows it to function without blocking the overall display area, achieving full-screen effect while accommodating camera functionality
2Adaptability or versatility
If the pixel density is reduced in the second display region to accommodate the camera, then camera installation is enabled, but color difference between display regions occurs
Solution Approach 1:
Different pixel densities are applied to different regions of the display panel. The first display region maintains high pixel density for normal display, while the second display region has reduced pixel density to accommodate the camera. Compensation pixel units are strategically placed at the boundary between regions with specific local properties to bridge the visual gap and maintain overall color uniformity
Solution Approach 2:
Compensation pixel units are used to adjust and balance the color output between the first and second display regions. These compensation pixels modify the color characteristics in the transition zone to eliminate visible color differences that would otherwise result from the pixel density change, ensuring seamless visual continuity across the full display area
3Manufacturing precision
If compensation pixel units are added to the second display region, then color difference is compensated, but device complexity increases
Solution Approach 1:
Instead of implementing compensation mechanisms across the entire display panel, compensation pixel units are strategically placed only in the second display region where the camera is located and where color difference occurs. This partial application of compensation reduces the overall complexity compared to full-panel compensation while still achieving the desired color uniformity
Solution Approach 2:
The display panel is segmented into distinct regions (first display region and second display region) with different pixel density characteristics. Compensation pixel units are specifically assigned to the second region, creating a segmented approach to color management that simplifies the overall system by addressing color uniformity only where needed rather than uniformly across the entire display
Data Source
AI summary
A display panel, a display apparatus, and a display device. The display panel includes a display panel, including: a first display region, including first pixel units; and a second display region, including second pixel units and compensation pixel units. A pixel density of the first display region is greater than a pixel density of the second display region; the compensation pixel units are arranged in a region between the second display region and the first display region; the compensation pixel units are configured to compensate for a color difference between the first display region and the second display region. The compensation pixel units include first compensation pixel units and second compensation pixel units; the first compensation pixel units are disposed on a side of the second display region, and the second compensation pixel units are disposed on another side of the second display region along a row direction.