Display Substrate Signal Layout for Under-Screen Camera Openings
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Solution Overview
Problem
The challenge in display device design is to accommodate a camera apparatus within the display screen while maintaining a full-screen and narrow frame design, as existing solutions require space for the camera, leading to reduced pixel density and display quality due to uneven pixel loading across different rows.
Innovation Solution
The display substrate incorporates a base substrate with specific opening regions and signal lines that allow for a virtual sub-pixel structure, including compensation capacitors, to equalize signal line loads and maintain consistent display quality across the screen, even with irregularly shaped display regions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a camera apparatus is arranged on a side outside the display region, then the camera device can be installed, but the frame position is occupied which is not conducive to full screen and narrow frame design
Solution Approach 1:
The camera apparatus is nested within the display region by creating a virtual sub-pixel that contains the camera opening. The display region is designed to partially surround the opening region, allowing the camera to be positioned within the display area rather than outside it, thus achieving full-screen design while accommodating the camera function.
2Adaptability or versatility
If a position is reserved for the camera device in the display region, then the camera can be integrated, but the pixel density and display quality deteriorate due to uneven pixel loading across different rows
Solution Approach 1:
The patent applies local quality by creating a virtual sub-pixel with a virtual pixel circuit that has different characteristics from regular sub-pixels. The virtual pixel circuit includes compensation capacitors and signal lines with adjusted parameters to compensate for the uneven pixel loading caused by the camera opening, thereby maintaining uniform pixel density and display quality across all rows.
Solution Approach 2:
The patent changes the parameters of the pixel circuit by introducing a virtual pixel circuit with compensation capacitors (first compensation capacitor and second compensation capacitor) and adjusted signal line configurations. These parameter changes compensate for the uneven pixel loading effect, ensuring consistent display quality across rows with different numbers of actual sub-pixels.
3Adaptability or versatility
If signal lines pass through opening peripheral regions and inter-opening regions, then camera integration is enabled, but signal line load becomes uneven causing display quality inconsistency
Solution Approach 1:
The patent implements feedback by using the virtual pixel circuit to detect and compensate for the uneven signal line loads. The compensation capacitors in the virtual pixel circuit are configured to counterbalance the capacitive loading effects caused by signal lines passing through the opening peripheral regions, thereby maintaining consistent display quality across different rows.
Solution Approach 2:
The virtual pixel circuit acts as an intermediary between the actual sub-pixels and the signal lines. It includes compensation capacitors that mediate the uneven capacitive loads introduced by signal lines passing through the opening regions, thereby ensuring uniform display performance across all rows.
Data Source
AI summary
A display substrate and a display device. A first opening region includes a first opening and a first opening peripheral region surrounding the first opening; a display region surrounds the first opening region the first signal lines extend along the first direction; the second signal lines extend along a second direction; the second signal lines pass through the first opening peripheral region along the second direction, each second signal line includes a longitudinal winding portion in the first opening peripheral region; the longitudinal winding portion partially surrounds the first opening; the longitudinal winding portion closest to the first opening among longitudinal winding portion of the plurality of second signal lines is an edge longitudinal winding portion, and the first floating electrode is in a same layer as the edge longitudinal winding portion and is at a side of the edge longitudinal winding portion close to the first opening.