Scan Driver Stage Layout for Flexible Display Panel Cutting
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Solution Overview
Problem
Traditional gate drivers on the left and right edge areas of the substrate cannot support arbitrary cutting requirements, limiting the flexibility and adaptability of display devices in terms of bezel width and size.
Innovation Solution
The display device incorporates a substrate with a pixel array and scan drivers, including dummy stages and stages arranged in specific directions to accommodate various cutting sizes, ensuring a narrow bezel and improved adaptability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional gate drivers are placed on the left and right edge areas of the substrate, then the display device can be manufactured with conventional structures, but the substrate cannot support arbitrary cutting requirements and bezel width is limited
Solution Approach 1:
The gate driver is divided into multiple stages (first stage to last stage) corresponding to different scanning regions of the pixel array. Each stage can be independently configured and connected to specific gate lines, allowing the substrate to be cut at different positions while maintaining functional integrity. The segmentation enables flexible substrate cutting by assigning different numbers of stages to different regions.
Solution Approach 2:
The gate driver stages are arranged not only horizontally across the substrate edges but also vertically in sequence from first stage to last stage. This multi-dimensional arrangement allows the driver to adapt to various substrate cutting configurations, enabling the same driver structure to support both full-size substrates and cut substrates with different bezel widths.
2Ease of manufacture
If the substrate is designed for arbitrary cutting sizes, then product adaptability is improved and manufacturing costs are reduced, but the gate driver structure becomes more complex
Solution Approach 1:
The gate driver is designed with universal functionality to support multiple substrate configurations. The same driver structure can be used for full-size substrates, substrates with narrow bezels, and various cut sizes. The first stage to last stage can be selectively activated and connected based on the substrate cutting pattern, making the driver universally applicable across different product specifications.
Solution Approach 2:
The gate driver configuration is made dynamic and adjustable rather than fixed. The connection between driver stages and gate lines can be reconfigured based on substrate cutting requirements. This dynamic capability allows the system to adapt to different manufacturing needs without requiring completely different driver designs for each substrate size.
3Adaptability or versatility
If dummy stages are added to the scan driver, then the driver can support various cutting sizes and maintain narrow bezel, but the device structure becomes more complex
Solution Approach 1:
Dummy stages are pre-configured in the gate driver structure during manufacturing, positioned before the first stage and/or after the last stage. These dummy stages are prepared in advance and can be selectively activated depending on the substrate cutting pattern. This preliminary preparation allows the system to quickly adapt to different cutting requirements without requiring structural modifications.
Solution Approach 2:
The dummy stages function as expendable or optional components that can be activated or deactivated based on needs. They serve as flexible placeholders that enable cutting adaptability but do not require permanent integration into the active scanning path for all configurations, reducing the need for complex permanent structural changes.
Data Source
AI summary
A display device includes a substrate, a pixel array and a first scan driver. The pixel array is formed on the substrate. The pixel array includes multiple gate lines and multiple connection lines. The gate lines extend along a first direction. The connection lines extend along a second direction different from the first direction. The first scan driver includes multiple dummy stages and a first stage to a last stage. The dummy stages and the first stage to the last stage of the first scan driver are arranged in sequence along a direction the same as a signal transmission direction on the substrate.