OLED Input Capacitor Structure for Voltage Fluctuation Control
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Solution Overview
Problem
High-resolution organic light emitting diode (OLED) displays face challenges in efficiently transferring data voltages into pixels due to complex pixel structures, leading to fluctuations in anode voltage, which affect display quality.
Innovation Solution
The implementation of an input capacitor structure within the OLED display, utilizing a data line expansion part as one electrode and a separate electrode for the input capacitor, allows for efficient data voltage transfer with reduced voltage fluctuations, maintaining stable anode voltage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If data voltages are transferred into pixels using an input capacitor in high-resolution OLED displays, then data voltage transfer efficiency is improved, but anode voltage fluctuations occur which deteriorate display quality
Solution Approach 1:
The patent introduces an intermediary capacitor connected between the anode electrode and the data line to mediate the voltage transfer process. This capacitor acts as a buffer that decouples the direct voltage relationship between the data line and anode electrode, allowing efficient data voltage transfer while preventing harmful voltage fluctuations from reaching the anode electrode, thus resolving the contradiction between transfer efficiency and display quality
Solution Approach 2:
The patent implements beforehand cushioning by pre-establishing the capacitor connection between the anode electrode and data line before data voltage transfer occurs. This proactive measure creates a protective buffer that cushions against potential voltage fluctuations during the data transfer process, ensuring stable anode voltage and maintaining display quality while enabling efficient voltage transfer
2Measurement precision
If pixel structure is made more complex to achieve high resolution, then display resolution is improved, but space for forming pixels is reduced making voltage transfer less efficient
Solution Approach 1:
The patent applies dimensionality change by introducing a vertical capacitor structure that extends in the thickness direction of the display. This allows the capacitor to occupy vertical space rather than horizontal pixel area, enabling high-resolution pixel formation while maintaining sufficient space for efficient voltage transfer through the vertically-oriented capacitor component
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 solution enables high-efficiency data voltage reception into pixels, minimizing anode voltage fluctuations and thereby enhancing display quality and resolution in high-resolution OLED displays.
Implementation Method 1
the first electrode for the input capacitor may overlap the expansion part of the data line to form the input capacitor
Data Source
AI summary
An organic light emitting diode display includes a substrate, a semiconductor pattern disposed on the substrate, a first conductive layer disposed on the semiconductor pattern and including a first gate electrode having an island-shaped structure, a second gate electrode having an island-shaped structure, and a third gate electrode having an island-shaped structure, and a second conductive layer disposed on the first conductive layer and including a first initialization voltage line overlapping the first gate electrode, a scan line overlapping the second gate electrode, and a control signal line overlapping the third gate electrode, where the control signal line is electrically connected to the third gate electrode, the scan line is electrically connected to the second gate electrode, and the first initialization voltage line, the scan line, and the control signal line extend in a first direction.