Display Pixel Circuit Layout for High-Transmittance Component Areas
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Solution Overview
Problem
The integration of a component area in display apparatuses for additional functions reduces the transmittance of light and sound due to the presence of connection wiring and signal wiring, which are necessary for driving display elements located apart from the pixel circuit.
Innovation Solution
The display apparatus includes a component area with high transmittance, utilizing a substrate design with specific arrangements of pixel circuits, connection wiring, and signal wiring, where the connection wiring includes transparent conductive materials and overlaps with signal wiring, and the pixel circuit is positioned in adjacent areas to maintain high transmittance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If connection wiring and signal wiring are arranged in the component area to drive display elements, then electrical connectivity is improved, but transmittance of light and sound is reduced
Solution Approach 1:
The pixel circuit is extracted from the component area and placed in the adjacent area, removing the harmful effect of the pixel circuit structure on transmittance while maintaining electrical connectivity through connection wiring
Solution Approach 2:
Different regions of the substrate are assigned different functions: the component area maintains high transmittance for optical/acoustic functions, while the adjacent area houses the pixel circuit for electrical driving functions, with connection wiring providing localized electrical connectivity
2Device complexity
If pixel circuit is placed in the component area to drive display elements, then device integration is improved, but transmittance is reduced
Solution Approach 1:
The display apparatus is segmented into distinct functional zones: component area for optical/acoustic functions, adjacent area for pixel circuit, and main area for additional display functions, allowing each zone to optimize for its specific requirements
Solution Approach 2:
Connection wiring serves as an intermediary element that provides electrical connectivity between the pixel circuit in the adjacent area and the display element in the component area, enabling functional integration without physical co-location
3Reliability
If connection wiring extends from adjacent area to component area, then electrical connectivity is achieved, but transmittance is reduced
Solution Approach 1:
The material composition of connection wiring is optimized by combining transparent conductive materials with metal materials, changing the electrical and optical parameters to achieve both connectivity and minimal transmittance impact
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This design maintains high transmittance in the component area by optimizing the placement and materials of connection and signal wiring, ensuring effective functionality of both display and component areas without compromising light or sound transmission.
Implementation Method 1
the connection wiring includes transparent conductive materials and overlaps with signal wiring
Implementation Method 2
The component area needs to maintain a relatively high transmittance of light, sound, or the like
Data Source
AI summary
A display apparatus includes a substrate including a component area, a first adjacent area and a second adjacent area arranged with the component area therebetween, and a main area at least partially surrounding the component area and the adjacent areas in plan view, a first display element in the component area and including a pixel electrode, an emission layer on the pixel electrode, and a counter electrode, a second display element, a first pixel circuit electrically connected to the first display element, and a second pixel circuit electrically connected to the second display element, in the adjacent area, a signal wiring in the component area, adjacent to the pixel electrode, and extending in a first direction from a boundary where the component area contacts the first adjacent area, and a connection wiring adjacent to the pixel electrode and electrically connecting the first display element to the first pixel circuit.