Under-Panel Camera Display Pixel Circuit Design
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Solution Overview
Problem
The challenge in creating a display with a camera under panel is the reduced luminance in the region above the camera due to lower pixel density, which requires lower data voltage to compensate, potentially shortening the pixel lifetime.
Innovation Solution
A display design with a camera under panel that includes a frame rate controller and switching circuit to manage data signals between different pixel sets, allowing for increased surface area of pixels without increasing manufacturing complexity, maintaining luminance and extending pixel lifetime.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the pixel density is reduced to allow more light to pass through the panel to the camera sensor, then the photographing effect is improved, but the luminance of the panel region above the camera becomes lower than adjacent regions
Solution Approach 1:
The patent applies different pixel configurations to different regions of the display. The first pixel set in the under-panel camera region uses a different arrangement (with shared data lines and switching circuitry) compared to the second pixel set in the non-under-panel region, allowing each region to be optimized for its specific function while maintaining overall display quality.
Solution Approach 2:
The patent introduces a switching circuit that dynamically controls data line connections based on frame timing. The switching circuit alternates between connecting to the first pixel set for odd frames and the second pixel set for even frames, enabling dynamic adjustment of light transmission and luminance characteristics.
2Illumination intensity
If a lower data voltage is applied to the pixels in the under-panel camera region to compensate for lower luminance, then the luminance is compensated, but the lifetime of the pixels in this region is reduced
Solution Approach 1:
The patent implements periodic switching between the first and second pixel sets using the switching circuit. By alternating between odd frames (first pixel set) and even frames (second pixel set), the system distributes the operational load and reduces continuous high-voltage stress on any single pixel, thereby extending pixel lifetime while maintaining luminance compensation.
3Illumination intensity
If the surface area of pixels is increased to maintain luminance without reducing pixel density, then the luminance is maintained, but the manufacturing complexity increases
Solution Approach 1:
The patent merges the functionality of multiple pixels by allowing the first pixel and second pixel to share the same data line (third data line) and switching circuit. This consolidation reduces the total number of data lines and control circuits needed, simplifying manufacturing while maintaining the ability to control luminance in the under-panel region.
Solution Approach 2:
The switching circuit serves multiple functions: it controls data signal routing to different pixel sets, manages frame timing, and enables the same data line to serve both the first and second pixel sets at different times. This multi-functionality reduces the overall system complexity while achieving the luminance maintenance goal.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution maintains luminance in the under-panel camera region without increasing driving current, thereby reducing pixel illumination time and increasing pixel lifetime.
Implementation Method 1
a camera under panel, configured to transform a received light into an electric signal
Data Source
AI summary
A display includes a camera under panel, a display panel, a frame rate controller, and a switching circuit. The display panel includes an under-panel camera region corresponding to the camera under-panel. A first pixel set, positioned in the under-panel camera region, driven by a first scan line, a second scan line, a first data line, a second data line, a third data line, and a fourth data line. The first pixel set includes a first pixel electrically connected to the first scan line and the third data line, a second pixel electrically connected to the second scan line and the third data line, a third pixel electrically connected to the first scan line and the first data line, a fourth pixel electrically connected to the second scan line and the second data line, and a fifth pixel electrically connected to the second scan line and the fourth data line.