Display Panel Layout for Under-Screen Camera Light Transmittance
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Solution Overview
Problem
Existing display panels with under-screen cameras suffer from poor light transmittance in the camera region due to the presence of pixel circuits, leading to suboptimal display effects.
Innovation Solution
The display panel design separates pixel circuits from light-emitting elements, with pixel circuits located in a first display region and light-emitting elements in a second light-transmitting region, and incorporates compensation structures to reduce capacitance/resistance differences in data lines, thereby improving light transmittance and alleviating display defects like mura.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of moving object
If pixel circuits are placed in the second display region to drive light-emitting elements, then the screen-to-body ratio can be increased, but the light transmittance in the second display region deteriorates due to the presence of pixel circuits
Solution Approach 1:
The display panel is divided into a first display region and a second display region. The first display region contains both pixel circuits and light-emitting elements, while the second display region contains only light-emitting elements. This segmentation allows the second display region to have high light transmittance while the first display region provides the driving functionality, thereby achieving high screen-to-body ratio without compromising light transmittance in the second region.
Solution Approach 2:
The pixel circuits are extracted from the second display region and placed in the first display region. This extraction removes the obstacle to light transmission in the second display region, allowing light to pass through freely to enable under-screen camera functionality, while the pixel circuits remain in the first display region to continue driving the light-emitting elements.
2Area of moving object
If data lines are extended to cover larger areas to increase screen-to-body ratio, then the screen coverage is improved, but the capacitance and resistance of data lines increase causing display defects
Solution Approach 1:
The compensation structure is implemented in the peripheral region of the substrate, which is a different spatial dimension from the main display region. This allows compensation for the increased capacitance and resistance of extended data lines without interfering with the display quality in the main display region. The compensation structure includes compensation capacitors and compensation resistors that counterbalance the parasitic effects of the extended data lines.
Solution Approach 2:
The compensation structure creates a parallel compensating signal path that copies and counteracts the parasitic effects of the data lines. By introducing compensation capacitors connected to the data lines, the system creates a compensating charge discharge path that mirrors and抵消 the capacitive loading effects, thereby maintaining display quality despite extended data line lengths.
3Area of moving object
If the peripheral region is minimized to increase screen-to-body ratio, then the screen area is improved, but the space for compensation structures and connections is reduced
Solution Approach 1:
The compensation structure is merged with the data line routing by placing compensation capacitors directly along the data lines in the peripheral region. This integration allows the compensation functionality to be embedded within the existing data line structure, maximizing the use of available peripheral space while maintaining screen-to-body ratio. The compensation capacitors are positioned to share space with the data line traces and connections.
Solution Approach 2:
The compensation structure utilizes the peripheral region as a separate dimensional space for housing compensation components. By placing compensation capacitors and resistors in the peripheral region rather than in the main display region, the design preserves the display area while providing adequate space for compensation structures. The peripheral region acts as a dedicated zone for auxiliary functions.
Data Source
AI summary
A display panel and a display device are provided. The display panel includes: a base substrate having a display region and a peripheral region, the peripheral region being located on at least one side of the display region; a pixel unit located on the base substrate and including a pixel circuit and a light-emitting element, the pixel circuit being configured to drive the light-emitting element, the pixel circuit including a driving transistor and a data writing transistor, and the driving transistor being connected to the data writing transistor; a data line connected to the data writing transistor and configured to provide a data signal to the pixel circuit; and a compensation structure connected to the data line and located in the peripheral region, the compensation structure including at least one of a resistance compensation unit or a capacitance compensation unit.