Scan Driver Merging for Display Device Non-Display Region Width Reduction
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Solution Overview
Problem
Display devices face challenges in minimizing the width of the non-display region due to the increased number of scan drivers required for pixel operation, which affects the overall efficiency and design of the display panel.
Innovation Solution
A display device configuration where a single scan driver outputs multiple scan signals with equal activation durations, including initialization, compensation, and write signals, allowing each pixel to receive these signals, thereby reducing the need for multiple scan drivers and minimizing the non-display region width.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple scan drivers are used to provide initialization, compensation, and write signals to pixels, then the pixel operation reliability is improved, but the width of the non-display region increases
Solution Approach 1:
The patent combines multiple scan driver functions into a single scan driver by merging the initialization signal output, compensation signal output, and write signal output into one integrated component. This single scan driver sequentially provides all three types of scan signals to the pixels, eliminating the need for separate scan drivers and thereby reducing the non-display region width while maintaining reliable pixel operation through proper signal sequencing
Solution Approach 2:
The single scan driver is designed to perform multiple functions by sequentially outputting different types of scan signals. It functions as an initialization signal generator, compensation signal generator, and write signal generator within one device, allowing it to replace multiple specialized scan drivers while maintaining all necessary pixel control capabilities
2Manufacturing precision
If multiple scan drivers are used to ensure proper signal delivery to pixels, then the pixel control accuracy is improved, but the device complexity increases
Solution Approach 1:
The patent merges multiple scan driver circuits into one integrated scan driver that sequentially provides initialization, compensation, and write signals. This consolidation reduces the overall device complexity by eliminating redundant circuitry while maintaining precise pixel control through structured signal sequencing and timing control within the single driver
3Adaptability or versatility
If the activation sections of scan signals have different durations, then the pixel operation flexibility is improved, but the scan driver design complexity increases
Solution Approach 1:
The patent controls the duration parameter of scan signals by adjusting the activation section timing within the single scan driver. The driver sequentially outputs initialization, compensation, and write signals with specifically controlled activation durations, allowing flexible pixel operation while managing design complexity through systematic timing control rather than hardware complexity
Data Source
AI summary
A display device is disclosed that includes a display panel including a pixel and a scan driver to provide a first scan signal to a third scan signal to the pixel. The pixel includes a light emitting element, a first transistor connected between a first voltage line and the light emitting element, a second transistor connected between a data line and a first node, a gate electrode of the second transistor to receive a first scan signal, a third transistor connected between the second node and the first transistor, a gate electrode of the third transistor to receive a second scan signal, and a fourth transistor connected between a first initialization voltage line, which is to receive a first initialization voltage, and the second node, a gate electrode of the fourth transistor to receive a third scan signal. The first to third scan signals include first to third activation sections, and the first to third activation sections have an equal duration.