Under-Display Circuit Layout for Optical Device Integration
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Solution Overview
Problem
Display devices with holes overlapping optical devices reduce the display area ratio, compromising the effective use of the display surface.
Innovation Solution
A display device design with a substrate featuring a main display area and sub-display areas, including light transmission areas and dummy lines to accommodate optical devices without reducing the display area, allowing optical devices to function normally.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a hole is created in the display area to accommodate an optical device, then the optical device can be integrated into the electronic device, but the display area ratio decreases
Solution Approach 1:
The display area is segmented into a main display area and one or more sub-display areas. The sub-display areas are positioned to surround the main display area and can overlap with optical devices, allowing the optical devices to be accommodated without creating holes in the main display area. This segmentation enables the display area to be divided into functional zones with different purposes.
Solution Approach 2:
The patent utilizes the spatial dimension by arranging sub-display areas in a surrounding configuration around the main display area. This dimensional arrangement allows the sub-display areas to extend into regions that would otherwise be occupied by optical devices, effectively using the z-axis overlap capability to accommodate optical components without reducing the main display area.
2Adaptability or versatility
If the non-display area is expanded to accommodate circuit layers and optical devices, then device functionality is improved, but the display area ratio decreases
Solution Approach 1:
The patent merges the main display area with surrounding sub-display areas to create an integrated display structure. The sub-display areas are positioned to overlap with regions containing optical devices and circuit layers, effectively combining the display function with the structural requirements for accommodating other components. This merging eliminates the need for separate non-display areas.
Solution Approach 2:
The sub-display areas serve multiple functions: they provide additional display regions, accommodate optical devices through overlapping, and allow integration of circuit layers. This multi-functionality enables a single structure to fulfill multiple roles that would traditionally require separate areas, thereby improving device functionality without sacrificing display area ratio.
3Reliability
If dummy lines and reset transmission lines are added to the circuit layer, then optical devices can operate normally beneath the display, but device complexity increases
Solution Approach 1:
Dummy lines are introduced as intermediary elements in the circuit layer. These dummy lines are positioned to extend from the non-display area to the sub-display areas, serving as mediators that allow optical devices to function normally beneath the display. The dummy lines facilitate signal transmission and electrical connections without interfering with the optical device operation.
Solution Approach 2:
The circuit layer is designed with local quality variations, where dummy lines and reset transmission lines are strategically positioned only in specific regions (from non-display area to sub-display areas) where they are needed. This localized approach ensures that the additional circuit elements are placed only where necessary to support optical device operation, minimizing overall complexity while maintaining reliability.
Data Source
AI summary
There is provided a display device including a substrate, a circuit layer, and an element layer. A display area of the substrate includes a main display area in which emission areas are arranged side by side, and at least one sub-display area surrounded by the main display area. The at least one sub-display area further includes light transmission areas located between the emission areas. The circuit layer includes light-emitting pixel drivers respectively electrically connected to the light-emitting elements of the element layer, data lines transmitting data signals to the light-emitting pixel drivers, first dummy lines extending in a first direction intersecting the data lines, and second dummy lines extending parallel to the data lines and paired with the data lines, respectively. The second dummy lines include reset transmission lines extending from the non-display area to the at least one sub-display area.