Display Substrate Layout for Under-Screen Uniformity and Wiring
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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 layout issues and parasitic capacitance due to improper arrangement of wires.
Innovation Solution
A display substrate with a first display region partially light-transmissive for components, a second display region for pixel driving circuits, and a transition region with in-situ driving and reduced wire usage to unify display effects and simplify wiring, incorporating dummy pixel driving circuits to stabilize pixel driving circuits and reduce parasitic capacitance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If components such as cameras and light sensors are placed in the display region to achieve full-screen design, then the screen coverage is improved, but the display uniformity deteriorates due to the occupied display region
Solution Approach 1:
The display region is segmented into a first display region with sub-pixels and a transition display region without sub-pixels. The transition display region acts as an intermediate zone between the display region and the non-display region, allowing components to be placed underneath while maintaining display uniformity by gradually transitioning from light-emitting sub-pixels to non-light-emitting transition regions.
Solution Approach 2:
Different regions of the display substrate are assigned different functions: the first display region contains light-emitting sub-pixels for normal display, while the transition display region contains transition sub-pixels that gradually reduce light emission. This local differentiation allows components to be placed in the transition region without affecting the uniformity of the main display region.
2Ease of operation
If pixel driving circuits are arranged in the display region to drive sub-pixels, then the display function is achieved, but the wiring layout becomes complex and parasitic capacitance increases
Solution Approach 1:
The pixel driving circuits are extracted from the first display region and placed in the non-display region. This separation allows the first display region to contain only sub-pixels for display purposes, while the pixel driving circuits are located in the non-display region, simplifying the wiring layout and reducing parasitic capacitance in the display region.
3Stability of the object's composition
If transition sub-pixels are introduced between the display region and non-display region, then display uniformity is improved, but the device structure becomes more complex
Solution Approach 1:
The transition sub-pixels dynamically adjust their light emission characteristics to create a gradual transition from the light-emitting first display region to the non-light-emitting non-display region. This dynamic adjustment of light emission in the transition region maintains display uniformity while managing the structural complexity through controlled optical properties.
Data Source
AI summary
A display substrate is provided, and the display substrate includes a first display region, a second display region and a first transition sub-region; the first display region includes a plurality of first sub-pixels, each first sub-pixel 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 first transition display region is between the first display region and the second display region, a plurality of first transition light-emitting devices in the first transition sub-region are electrically connected to the plurality of first transition pixel driving circuits respectively through a plurality of second wires.