Display Panel Sub-Pixel Layout for Sensing Area Brightness Matching
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Solution Overview
Problem
The challenge of implementing full-screen displays in smartphones is hindered by the presence of front cameras, which restrict screen design and create areas with low transmittance and luminance due to low-resolution pixels, leading to brightness and color differences between high-resolution display areas and low-resolution sensing areas.
Innovation Solution
A display panel design where high-resolution first pixels are adjacent to low-resolution second pixels, with at least one of the second pixel's sub-pixels being closest to the first pixel, and an image quality compensation algorithm is applied to adjust luminance and color coordinates in the sensing area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If a sensing area with low-resolution pixels is provided to enable full-screen display, then screen size is increased and full-screen display is achieved, but luminance and transmittance decrease in the sensing area
Solution Approach 1:
The patent applies different pixel resolution configurations to different regions of the display panel. The display area uses high-resolution pixels for optimal image quality, while the sensing area uses low-resolution pixels to maintain transmittance for camera functionality. This local differentiation resolves the contradiction by optimizing each region for its specific function rather than using uniform resolution across the entire screen.
Solution Approach 2:
The display panel is segmented into two distinct functional zones: a display area with high-resolution pixels and a sensing area with low-resolution pixels. This segmentation allows the panel to simultaneously achieve full-screen display capability while maintaining adequate luminance in the display area and transmittance in the sensing area for camera operations.
2Area of stationary object
If low-resolution pixels are arranged in the sensing area to reduce camera space occupation, then full-screen display is enabled, but brightness difference and color difference increase between sensing area and display area
Solution Approach 1:
The patent implements different pixel characteristics for different regions. The display area uses high-resolution pixels with optimized luminance for visual display, while the sensing area uses low-resolution pixels with adjusted characteristics to balance transmittance requirements for camera functionality with acceptable luminance for display purposes, reducing the brightness difference between areas.
Solution Approach 2:
The patent modifies key parameters such as pixel resolution, luminance, and color coordinates specifically for the sensing area compared to the display area. By adjusting these parameters locally, the patent reduces the brightness and color differences between the two regions while maintaining the full-screen display capability.
3Adaptability or versatility
If front camera is integrated into the display panel, then camera functionality is added, but screen design is restricted and transmittance decreases
Solution Approach 1:
The display panel is designed with multi-functionality by integrating both display and camera sensing capabilities within the same physical structure. The sensing area serves dual purposes: it functions as part of the display when showing images, and as a camera sensing region when capturing photos, eliminating the need for separate notches or punch holes that would reduce transmittance.
Solution Approach 2:
The patent merges the camera sensing function with the display function by arranging low-resolution pixels in the sensing area that can operate in both modes. This integration combines the camera and display functionalities into a single unified panel structure, avoiding the transmittance reduction that would result from separate camera cutouts.
Data Source
AI summary
Disclosed are a display panel and a display device including the same according to an embodiment. A display panel according to the embodiment includes: a display area in which a plurality of first pixels are arranged at a first pixels per inch (PPI); and a sensing area in which a plurality of second pixels are arranged at a second PPI that is lower than the first PPI, wherein the first pixels of the display area and the second pixels of the sensing area are arranged adjacent to each other at a boundary between the display area and the sensing area, the second pixel includes red, green, and blue sub-pixels, and at least one of the red and green sub-pixels of the second pixel is arranged closest to the first pixel.