Display Substrate Hole Layout for Under-Screen Sensor Transmittance
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Solution Overview
Problem
Existing display technologies face challenges in achieving a high screen-to-body ratio while maintaining the functionality and image quality of optical sensors, as through holes require encapsulation structures that reduce display area and blind holes compromise transmittance.
Innovation Solution
A display substrate design incorporating both through holes and blind holes allows for high transmittance optical sensors like cameras in through holes and lower transmittance sensors like infrared sensors in blind holes, eliminating the need for encapsulation structures and reducing bezel size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a general-purpose photolithography apparatus is used for manufacturing display devices, then device versatility is maintained, but manufacturing precision deteriorates due to focus deviations caused by substrate curvature
Solution Approach 1:
The substrate curvature is controlled in advance during the substrate preparation stage, before the photolithography process begins. By pre-adjusting the substrate mounting surface curvature to match the wafer back surface curvature, the substrate is positioned in an optimal state for high-precision photolithography, eliminating focus deviations during exposure.
2Manufacturing precision
If substrates are mounted on a flat mounting surface, then manufacturing simplicity is maintained, but substrate curvature control deteriorates leading to focus deviations
Solution Approach 1:
Instead of requiring the entire mounting surface to be curved, only the local mounting surface area that contacts the substrate back surface is formed with a specific curvature. This localized curvature matching allows precise focus control during photolithography while keeping the rest of the manufacturing process simple and straightforward.
3Adaptability or versatility
If substrates with different curvatures are processed, then adaptability is improved, but manufacturing precision deteriorates due to focus deviations in flat-processed regions
Solution Approach 1:
The mounting surface curvature is adjusted to match the specific curvature of each substrate type. By changing the mounting surface curvature parameter according to the substrate curvature, the invention accommodates different substrate types while maintaining consistent focus precision across all regions during photolithography processing.
Data Source
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AI summary
Provided is a display substrate, comprising a display region, a hole border region, at least one wiring region, at least one through hole region, at least one blind hole region. The at least one wiring region surrounds one through hole region or one blind hole region, the hold border region surrounds the wiring region, and the display region surrounds the hole border region. The display substrate comprises a base substrate and a driver circuit layer disposed on the base substrate. The base substrate is provided with an opening in the through hole region. The driver circuit layer comprises at least one metal layer and at least one insulating layer. The at last one metal layer is located in the display region and the wiring region. The at least one metal layer comprises a plurality of signal lines, and the plurality of signal lines are arranged to avoid the through hole region and the blind hole region. The at least one insulating layer is located in the display region, the hold border region, the wiring region, and the blind hole region. The blind hole region is light-transmitting.