Display Substrate Layout for Under-Screen Sensors and Uniform Pixels
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Solution Overview
Problem
The challenge of achieving a full-screen design in display screens is hindered by components such as cameras and light sensors occupying the display region, leading to uneven display effects and complex wiring layouts.
Innovation Solution
A display substrate with a first display region that is partially light-transmissive, a second display region containing pixel driving circuits, and a transition region with in-situ driven sub-pixels, reducing wire count and parasitic capacitance, and ensuring uniform display effects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of moving object
If components such as cameras and light sensors are placed in the display region to achieve larger screens, then the screen size increases, but the display uniformity deteriorates due to occupied display regions
Solution Approach 1:
The display substrate is divided into three distinct regions: a first display region with light-transmissive characteristics for sensor placement, a second display region with standard display characteristics, and a transition display region connecting them. This segmentation allows each region to have optimized properties, maintaining overall display uniformity while enabling larger screen area by accommodating sensors in the first display region.
Solution Approach 2:
Different regions of the display substrate are assigned different optical properties. The first display region is designed to be light-transmissive to allow sensor operation, while the second display region maintains standard display quality. The transition region gradually changes properties to ensure smooth visual transition, allowing each local area to have the quality needed for its specific function.
2Device complexity
If pixel driving circuits are placed in the display region to reduce wiring complexity, then the wiring layout simplifies, but the display area occupied by components increases
Solution Approach 1:
The pixel driving circuits are positioned in the second display region rather than being integrated within each pixel structure or placed in the first light-transmissive region. This spatial reorganization in the planar dimension reduces the wiring complexity by grouping circuits closer to their corresponding pixels while maintaining the light-transmissive properties of the first display region for sensors.
3Object-generated harmful factors
If transition sub-pixels are designed with in-situ driving to reduce parasitic capacitance, then the parasitic capacitance decreases, but the device structure becomes more complex
Solution Approach 1:
The pixel driving circuits for the transition sub-pixels are extracted from the first light-transmissive display region and placed in the second display region. This extraction reduces the parasitic capacitance by increasing the distance between the light-transmissive components and the driving circuits, while the transition sub-pixels in the second region can be driven by these external circuits without requiring complex in-situ integration.
Data Source
AI summary
A display substrate is provided, and the display substrate includes a first display region, a second display region and a transitional display region; the first display region includes a plurality of first sub-pixels, each first sub-pixel (P1) includes a first light-emitting device; the second display region includes a plurality of first pixel driving circuit and a plurality of first transition pixel driving circuits, the plurality of first pixel driving circuits are electrically connected to first light-emitting devices respectively through a plurality of first wires; the transition display region is between the first display region and the second display region, including a first transition sub-region and a second transition sub-region, a plurality of first transition light-emitting devices in the first transition sub-region are electrically connected to the plurality of first pixel driving circuits respectively through a plurality of second wires, the second transition sub-region includes a plurality of second transition sub-pixels.