Sharing Pixel Control for Under-Screen Camera Light Transmittance
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Solution Overview
Problem
Existing electronic devices with under-screen camera solutions face challenges in increasing light intake to improve image capture quality, as conventional methods do not effectively balance light transmittance with display resolution.
Innovation Solution
The electronic device incorporates a display screen with a sharing pixel configuration, where each sharing pixel is controlled by a driving sub-circuit using both a first control signal for common control and a second control signal for individual control, allowing for increased light transmittance in the image collection area without compromising display resolution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If conventional display pixel structures are used in the image collection area, then display resolution is maintained, but light transmittance is insufficient for the under-screen camera
Solution Approach 1:
The patent merges the driving functions of multiple sub-pixels into a single shared driving sub-circuit. The driving sub-circuit of a first pixel is shared to control sub-pixels in both the first pixel and a second pixel, reducing the number of driving circuits in the image collection area and increasing light transmittance while maintaining display resolution through temporal multiplexing control
2Reliability
If the number of driving circuits is reduced to increase light transmittance, then image capture quality improves, but control precision over individual pixels may deteriorate
Solution Approach 1:
The patent employs periodic time-division multiplexing control where the shared driving sub-circuit alternates between controlling sub-pixels of the first pixel and sub-pixels of the second pixel at different time points. This periodic switching maintains precise individual control while allowing the driving circuit to be shared, thus improving light transmittance without sacrificing control precision
Solution Approach 2:
The control system dynamically switches the connection between the shared driving sub-circuit and different sub-pixels based on timing signals. The driving sub-circuit is selectively connected to control different pixels at different time periods, enabling both sharing for light transmittance and individual control for precision
Data Source
AI summary
An electronic device includes a camera and a display screen located above the camera. A display output area of the display screen includes a first area corresponding to image collection areas of the camera and a second area not overlapping with the first area. The display screen includes a sharing pixel corresponding to the first area and a shared pixel, the sharing pixel including at least three sub-pixels. Each sub-pixel of the at least three sub-pixels of the sharing pixel is commonly controlled based on a first control signal of a driving sub-circuit in a driving circuit of the shared pixel, and individually controlled based on a second control signal.