Distributed Display Drivers Minimize Non-Display Area
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Solution Overview
Problem
Display devices face challenges in minimizing the non-display area due to the need for space to accommodate drivers and load matching capacitors for compensating RC delays, which limits the bezel size and overall design efficiency.
Innovation Solution
The display device is designed with a specific configuration of pixels connected to write scan lines and compensation scan lines, where the number of pixels and compensation scan lines are strategically distributed to minimize RC delays, allowing for the distribution of control stages on both sides of the pixel unit and reducing the need for a load matching capacitor.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If drivers and load matching capacitors are placed in the non-display area, then pixel control functionality is ensured, but the non-display area size increases
Solution Approach 1:
The scan driver is divided into multiple independent stages (first scan driver, second scan driver, third scan driver, fourth scan driver) that are distributed on both sides of the pixel unit. Each stage controls a specific group of scan lines, allowing the driver functionality to be segmented across different locations rather than concentrated in one non-display area, thereby reducing the required non-display area while maintaining full pixel control capability
Solution Approach 2:
Instead of placing all drivers in a single non-display area (2D concentration), the invention distributes drivers along both sides of the pixel unit (utilizing the vertical dimension). This spatial redistribution moves driver placement from a centralized horizontal arrangement to a distributed vertical arrangement, effectively reducing the horizontal non-display area while preserving driver functionality
2Reliability
If compensation scan lines are distributed to all pixel rows, then RC delay compensation is achieved, but the number of compensation scan lines increases
Solution Approach 1:
The pixel rows are divided into multiple groups, with each group receiving compensation scan lines from a specific compensation stage. The fourth compensation stage provides compensation to a fourth group of pixel rows, while other stages compensate different groups. This segmentation allows RC delay compensation to be achieved in a distributed manner, reducing the need for every pixel row to have individual dedicated compensation scan lines
Solution Approach 2:
Each compensation stage is designed to serve multiple pixel rows within its group, making the compensation scan lines multi-functional. A single compensation scan line from a compensation stage can compensate RC delays for multiple pixel rows simultaneously, increasing the utility of each compensation scan line and reducing the total number required
Data Source
AI summary
A display device including: first pixels connected to a first write line and a first compensation line; second pixels connected to a second write fine and a second compensation line; third pixels connected to a third write line and a third compensation line; fourth pixels connected to a fourth write line and a fourth compensation line; fifth pixels connected to a fifth write line and a fifth compensation line; sixth pixels connected to a sixth write line and a sixth compensation line; seventh pixels connected to a seventh write line and a seventh compensation line; and eighth pixels connected to an eighth write line and an eighth compensation line, the first to fourth compensation lines are connected to a first node, the fifth and sixth compensation lines are connected to a second node, the seventh and eighth compensation lines are connected to a third node.