OLED Display Wiring via Multi-Plane Separation
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Solution Overview
Problem
Conventional active matrix organic light emitting diode displays face challenges in reducing pixel size for high resolution and definition due to increased inferiority rates and reliability issues caused by voltage drops and horizontal shorts when thin film transistor electrodes or wires are narrowed or spaced too closely.
Innovation Solution
The design includes a substrate with pixels featuring an organic light emitting diode, a driving circuit with a thin film transistor, and wires with a gate line, data line, and common power line formed on different planes, ensuring sufficient width for the data and common power lines to prevent voltage drops and horizontal shorts, while maintaining a narrow pixel width.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the pixel width is reduced to achieve high resolution and definition, then the display resolution is improved, but the inferiority rate increases due to voltage drops and horizontal shorts
Solution Approach 1:
The patent applies three-dimensional stacking to form data lines and common power lines on different planes (first plane and second plane), separating them vertically to prevent horizontal shorts while maintaining sufficient line widths for reliable voltage transmission, thus resolving the contradiction between high resolution and reliability
Solution Approach 2:
The patent segments the wiring structure into multiple independent layers (first plane for data lines, second plane for common power lines), allowing each layer to be optimized independently for its specific function while avoiding interference and shorts between different signal types
2Ease of manufacture
If the data line and common power line are formed on the same plane, then the manufacturing process is simplified, but horizontal shorts occur between the lines
Solution Approach 1:
The patent moves the data line and common power line from the same plane to different planes (first plane and second plane respectively), using vertical separation to eliminate horizontal shorts while maintaining manufacturing feasibility through standardized multi-layer deposition processes
3Reliability
If the width of data line and common power line is increased to prevent voltage drops, then the voltage stability is improved, but the pixel width must be increased reducing resolution
Solution Approach 1:
By stacking data lines and common power lines on different planes, the patent enables sufficient line widths for voltage stability without increasing the horizontal pixel width, as the lines occupy vertical space rather than horizontal space, thus maintaining high resolution
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 configuration reduces the inferiority rate of the organic light emitting diode display, enabling high resolution and definition by preventing voltage drops and horizontal shorts, thus enhancing the display's reliability and image quality.
Implementation Method 1
Holes and electrons are injected into the organic emissive layer from the anode and the cathode, and are combined with each other therein so as to generate excitons. When the excitons drop from an excited state to a ground state, energy is generated to emit light.
Data Source
AI summary
An organic light emitting diode display that includes a substrate defined with a plurality of pixels, an organic light emitting diode formed at each pixel with a first electrode, an organic emissive layer, and a second electrode, a driving circuit with a thin film transistor electrically connected to the organic light emitting diode, and a wire electrically connected to the driving circuit with a gate line, a data line, and a common power line to transmit external signals to the driving circuit. The data line and the common power line are formed in different geometric planes.