Display Panel Reset-Line Layout for CUP Horizontal Mura
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Solution Overview
Problem
Current camera under panel (CUP) display devices experience inconsistent resistance and capacitance loading between the conventional display area and the imaging area, leading to horizontal mura in low gray-scale modes due to inconsistent wiring design.
Innovation Solution
A display panel design with a one-to-one correspondence of reset signal lines to rows of pixel driving circuits, where each row of first pixel driving circuits in the conventional display area is connected to a same reset signal line, and each row of second pixel driving circuits in the imaging area is connected to a same reset signal line, with some signal lines crossing both areas to balance loading.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the number of pixel driving circuit rows in the imaging area is reduced to improve light transmittance, then light transmittance is improved, but resistance-capacitance loading consistency deteriorates
Solution Approach 1:
The patent applies local quality by differentiating the wiring structure between the imaging area and conventional display area. Specifically, reset signal lines in the imaging area are designed to serve multiple rows of pixel driving circuits, while scan signal lines are designed to serve only one row each. This localized differentiation ensures that the imaging area maintains consistent resistance-capacitance loading with the conventional display area despite having fewer pixel driving circuit rows, thereby resolving the contradiction between improved light transmittance and maintained reliability.
2Ease of operation
If signal lines are extended from conventional display area to imaging area, then electrical connection is achieved, but wiring complexity increases
Solution Approach 1:
The patent applies universality by designing reset signal lines that serve multiple functions across different areas. Specifically, each reset signal line in the imaging area is connected to multiple rows of pixel driving circuits, allowing a single signal line to control multiple rows. This multi-functional design simplifies the overall wiring structure by reducing the number of separate signal lines needed, thereby resolving the contradiction between achieving electrical connection and minimizing wiring complexity.
Data Source
AI summary
A display panel and a display device are disclosed. The display panel includes a display substrate, a plurality rows of first pixel driving circuits, a plurality rows of second pixel driving circuits, and a plurality of first reset signal lines; the plurality of reset signal lines comprises a plurality of first reset signal lines and a plurality of second reset signal lines, each of the first reset signal lines is only electrically connected to one row of the first pixel driving circuits; each of the second reset signal lines is electrically connected to one row of the first pixel driving circuits and at least one row of the second pixel driving circuits.