Dual-Sided Display Panel With Transparent Conductive Oxide Connection Lines
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Solution Overview
Problem
Current display technologies lack the ability to efficiently utilize both surfaces of a display apparatus for image display and component operation, especially when folded, leading to reduced functionality and light transmittance in dual-sided applications.
Innovation Solution
A display panel design featuring a substrate with a pixel circuit layer and display element layer on both sides, including a connection line with transparent conductive oxide, where the first pixel circuit has more thin-film transistors than the second, allowing for dual-sided image display and component operation when folded about a folding axis.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a display apparatus is designed to display images on both surfaces, then the functionality and utility of the display apparatus are improved, but the light transmittance and display quality may be compromised due to the presence of circuit components on both sides
Solution Approach 1:
The display apparatus is segmented into distinct functional zones: a first display area with full display functionality on the first surface, and a second display area optimized for light transmittance on the second surface. The substrate is divided into a first area containing pixel circuits and a second area optimized for light transmission, allowing each zone to perform its specific function without compromising the other.
Solution Approach 2:
Different regions of the display apparatus are assigned different optical properties. The second display area is specifically designed with enhanced light transmittance characteristics to allow background display when the apparatus is folded, while the first display area maintains standard display qualities. This local optimization resolves the contradiction between dual-sided functionality and light transmittance.
2Manufacturing precision
If the number of thin-film transistors in the first pixel circuit is increased to improve display quality, then the display performance is improved, but the area occupied by the pixel circuit increases
Solution Approach 1:
The pixel circuits are arranged in a multi-layered three-dimensional structure on the substrate. By utilizing vertical stacking and multi-layer interconnections, the patent achieves high display quality with multiple thin-film transistors while minimizing the horizontal area occupied by the pixel circuits. This dimensional transition allows dense integration of circuit components.
3Reliability
If a connection line is added to connect the second pixel circuit to the second display element, then the electrical connectivity is improved, but the complexity of the pixel circuit layer increases
Solution Approach 1:
The connection line structure is designed to serve multiple functions: it provides electrical connectivity between the second pixel circuit and the second display element, while also being integrated into the existing multi-layer substrate structure. The connection line shares routing paths and structural support with other circuit elements, reducing overall complexity despite the addition of this critical connectivity path.
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
Enables efficient dual-sided image display and component operation in a folded state, maintaining high light transmittance and functionality by optimizing the number and arrangement of thin-film transistors and conductive oxide layers.
Implementation Method 1
The pixel circuit layer may further include a connection line extending from the first area to the second area and connecting the second pixel circuit to the second display element, and the connection line may include transparent conductive oxide.
Implementation Method 2
the connection line may include transparent conductive oxide
Data Source
AI summary
Disclosed is a display panel including: a substrate; a pixel circuit layer including a first pixel circuit which includes a plurality of first thin-film transistors and a second pixel circuit which includes a plurality of second thin-film transistors; and a display element layer including a first display element connected to the first pixel circuit and a second display element connected to the second pixel circuit. The number of the plurality of first thin-film transistors in the first pixel circuit is greater than the number of the plurality of second thin-film transistors in the second pixel circuit, and the display panel has a first surface including a first display area and has a second surface opposite to the first surface and including a second display area.