Virtual Subpixel Driving Circuit Stability in Flexible OLED Displays
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Solution Overview
Problem
In flexible OLED display panels, the arrangement of virtual subpixels at the periphery to ensure etching uniformity leads to stability issues and display quality problems due to simplified driving circuits, which can result in floating nodes and non-uniform display brightness.
Innovation Solution
A display substrate with virtual subpixels arranged adjacent to display subpixels, featuring a specific structure including a first potential signal line pattern and conductive connection members that maintain the node N1 at a stable potential, preventing floating states and improving display stability and quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If virtual subpixels are arranged at the periphery with simplified driving circuits to ensure etching uniformity, then manufacturing precision is improved, but display quality and stability deteriorate due to floating nodes and non-uniform brightness
Solution Approach 1:
The patent introduces a second conductive connection member as an intermediary element that couples the first conductive connection member to the first potential signal line pattern. This intermediary structure provides a stable potential reference for the virtual subpixel's driving circuit, preventing floating nodes while maintaining the simplified circuit design needed for etching uniformity.
Solution Approach 2:
The patent establishes equipotential connections by coupling the gate electrode of the virtual driving transistor to the first potential signal line pattern through the conductive connection members. This ensures that the gate electrode maintains a stable potential, preventing floating states and ensuring uniform display brightness across virtual and display subpixels.
2Ease of manufacture
If virtual subpixels use simplified driving circuits to reduce device complexity, then ease of manufacture is improved, but display quality deteriorates due to floating nodes and non-uniform brightness
Solution Approach 1:
The second conductive connection member serves as a mediator that connects the simplified driving circuit to the potential signal line, providing the necessary stable potential reference without adding complex circuitry. This maintains manufacturing simplicity while ensuring display quality.
Solution Approach 2:
The first potential signal line pattern serves multiple functions: it provides potential reference for virtual subpixels, ensures uniform brightness, and maintains stable gate electrode potential. This multi-functionality allows the simplified circuit design to achieve reliable display performance.
3Area of stationary object
If virtual subpixels are arranged adjacent to display subpixels to maximize display region, then area is improved, but stability deteriorates due to floating nodes in the driving circuit
Solution Approach 1:
By coupling the gate electrode to the first potential signal line pattern through the conductive connection members, the patent establishes equipotential conditions that stabilize the driving circuit. This allows virtual subpixels to be arranged adjacent to display subpixels without compromising circuit stability.
Solution Approach 2:
The conductive connection members act as intermediaries that bridge the simplified virtual subpixel driving circuit with the stable potential reference, enabling adjacent arrangement of virtual and display subpixels while maintaining circuit stability through the mediating connection.
Data Source
AI summary
The present disclosure provides a display substrate, a manufacturing method thereof, and a display device. The display substrate includes a base substrate and a plurality of subpixels arranged on the base substrate in an array form. The plurality of subpixels includes a plurality of display subpixels at a display region of the display substrate and a plurality of virtual subpixels, and at least a part of the virtual subpixels are arranged adjacent to the display subpixels. The virtual subpixel includes a first potential signal line pattern, a virtual subpixel driving circuit including a virtual driving transistor and a first conductive connection member coupled to a gate electrode of the virtual driving transistor, and a second conductive connection member coupled to the first conductive connection member and the first potential signal line pattern.