OLED Pixel Gate Line Merging for Aperture Ratio
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Solution Overview
Problem
Conventional OLED display devices have a reduced aperture ratio due to the need for multiple gate lines to transmit scan and sense signals, which complicates the pixel circuit and wiring structure, thereby limiting picture quality.
Innovation Solution
The OLED display device connects sub-pixels on each horizontal line to both a gate line on the same and next horizontal line, using a gate driver to supply overlapping gate signals and a data driver to manage data lines, allowing for a simplified pixel circuit and wiring structure while maintaining image display functionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If multiple gate lines are provided to transmit scan signal and sense signal separately, then the pixel circuit can be driven sequentially, but the aperture ratio of each sub-pixel is reduced
Solution Approach 1:
The patent merges the scan signal transmission function and sense signal transmission function into a single gate line. The gate line transmits both signals sequentially by controlling the timing and voltage levels, eliminating the need for separate gate lines and thereby increasing the aperture ratio while maintaining sequential driving capability.
Solution Approach 2:
The gate line is designed to perform multiple functions: it serves as both a scan signal line and a sense signal line. By applying different voltage levels and timing sequences, the same gate line can selectively transmit either scan signals or sense signals to the pixel circuits, achieving multi-functionality with a single structure.
2Ease of operation
If multiple gate lines are provided for scan and sense signals, then the pixel circuit can be controlled independently, but the wiring structure becomes complex
Solution Approach 1:
The patent combines multiple signal transmission functions into a single gate line structure. By using time-division multiplexing and voltage-level control, the same physical wire carries both scan and sense signals, dramatically simplifying the wiring structure while preserving independent pixel control through sequential signal activation.
Solution Approach 2:
The gate line system employs dynamic voltage control and time-division signaling to achieve independent pixel control without multiple physical lines. The control signals are dynamically switched in time, allowing the same gate line to address different pixels or perform different functions at different moments, maintaining independence through temporal separation rather than spatial separation.
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 enhances the aperture ratio and picture quality by simplifying the pixel circuit and wiring structure, enabling effective compensation of video voltage and efficient image display with reduced gate lines per horizontal line.
Implementation Method 1
an organic light emitting layer emits light by recombination of electrons and holes
Data Source
AI summary
Disclosed is an organic light emitting diode display device and a method for driving the same. The device includes a display panel having a plurality of sub-pixels wherein the sub-pixels formed on each horizontal line are connected to a gate line on the same horizontal line and are further connected to a gate line on a next horizontal line to further receive a gate on signal from the gate line on the next horizontal line so as to display an image, a power supply supplying first and second power signals to power lines of the display panel and supplying a compensation voltage to a compensation power line, and a timing controller for arranging external input video data suitably for driving of the display panel and controlling gate and data drivers such that the image is displayed based on a data voltage compensated for by the compensation voltage.