Display Substrate Layout for Under-Screen Light Transmission
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Solution Overview
Problem
Current display technologies face challenges in achieving a high screen-to-body ratio and full-screen display due to optical elements obstructing light in the display apparatus, particularly in the transition between the first and second display regions.
Innovation Solution
A display substrate with a first and second display region is designed, where the second region surrounds the first, featuring light-emitting device groups, pixel circuit groups, and lead groups. The leads connect the light-emitting devices to pixel circuits, with a specific arrangement of second pixel circuits between them, optimizing the routing paths to reduce parasitic capacitance and improve signal accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of moving object
If optical elements are disposed under the display screen to achieve full-screen display, then the screen-to-body ratio is improved, but the view is obstructed and the effective display area is reduced
Solution Approach 1:
The patent moves the pixel circuits from the front display surface to the back surface of the display substrate, utilizing the third dimension (depth) to resolve the conflict between full-screen coverage and viewing quality. This spatial reconfiguration allows the light-emitting layer to occupy the entire front surface while the circuitry is positioned on the opposite side, eliminating view obstruction while maintaining high screen-to-body ratio.
Solution Approach 2:
The patent implements a multi-layer nested structure where the light-emitting devices are positioned in a first display region and the pixel circuits are positioned in a second display region on the back surface, with lead groups extending through intermediate layers. This nested arrangement allows both functional components to coexist within the same display structure without interfering with each other's performance.
2Illumination intensity
If pixel circuits are positioned in the second display region surrounding the first display region, then light transmission is enhanced, but the device complexity increases
Solution Approach 1:
The patent divides the display substrate into two distinct display regions: a first display region containing light-emitting devices and a second display region containing pixel circuits. This segmentation separates the light-generating function from the circuit control function, allowing optimized light transmission in the first region while accommodating complex circuitry in the second region without mutual interference.
Solution Approach 2:
The second display region serves multiple functions: it houses the pixel circuits for controlling the light-emitting devices, provides structural support for the lead groups, and maintains the overall integrity of the display substrate. This multi-functional design reduces the need for additional separate components, thereby managing complexity despite the enhanced light transmission capability.
3Reliability
If lead groups extend from the first display region to the second display region passing through intermediate structures, then electrical connection is achieved, but the manufacturing precision requirements increase
Solution Approach 1:
The patent positions the lead groups to extend from the first display region to the second display region through pre-defined intermediate structures during the manufacturing process. This preliminary arrangement of lead paths allows for precise alignment to be established early in fabrication, ensuring reliable electrical connections between the light-emitting devices and pixel circuits while managing the precision requirements through structured routing.
Data Source
AI summary
A display substrate has a first display region and a second display region, and includes first light-emitting device groups disposed in the first display region, first pixel circuit groups disposed in the second display region, lead groups, and a plurality of second pixel circuits disposed in the second display region. A first light-emitting device group includes N first light-emitting devices. A first pixel circuit group includes N first pixel circuits. A lead group includes N leads, an i-th first light-emitting device is electrically connected to an i-th first pixel circuit through an i-th lead, and lengths of 1st to N-th leads increase. At least one line of second pixel circuits is disposed between the 1st first light-emitting device and the 1st first pixel circuit. The N leads extend from the first display region to the second display region passing through the at least one line of second pixel circuits.