Scan Circuit Segmentation for Display Subpixel Control
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Solution Overview
Problem
Current display technologies face challenges in efficiently controlling and driving scan circuits for image display, particularly in providing effective control signals to multiple rows of subpixels with existing gate driving circuits, which can lead to inefficiencies and limitations in display performance.
Innovation Solution
A scan circuit design comprising multiple stages with first and second scan units, where output signals from one stage are input to the next, allowing for control signal distribution across M rows of subpixels, with specific configurations of transistors and capacitors to optimize signal transmission and reduce power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a conventional gate driving circuit is used to control multiple rows of subpixels, then the display can be driven, but the control signal distribution becomes inefficient and power consumption increases
Solution Approach 1:
The gate driving circuit is divided into multiple scan units (first scan unit and second scan unit), each responsible for driving specific rows of subpixels. This segmentation allows parallel operation of different scan units, improving control signal distribution efficiency while reducing the active power consumption of any single unit.
Solution Approach 2:
The patent introduces a time-dimensional multiplexing approach where scan units operate in sequential stages. The first scan unit drives odd-numbered rows while the second scan unit drives even-numbered rows, with signals passing through intermediate nodes. This temporal segmentation enables efficient control of all rows without requiring all units to be active simultaneously, reducing overall power consumption.
2Reliability
If the gate driving circuit controls all rows sequentially, then complete coverage is achieved, but the signal transmission time increases
Solution Approach 1:
The gate driving circuit is divided into multiple scan units (first scan unit and second scan unit), each responsible for driving specific rows of subpixels. This segmentation allows parallel operation of different scan units, improving control signal distribution efficiency while reducing the active power consumption of any single unit.
Solution Approach 2:
The patent introduces a time-dimensional multiplexing approach where scan units operate in sequential stages. The first scan unit drives odd-numbered rows while the second scan unit drives even-numbered rows, with signals passing through intermediate nodes. This temporal segmentation enables efficient control of all rows without requiring all units to be active simultaneously, reducing overall power consumption.
3Adaptability or versatility
If more scan units are added to control additional rows, then coverage is improved, but the device complexity increases
Solution Approach 1:
Each scan unit is designed as a universal module that can drive multiple rows of subpixels through time-division multiplexing. The first scan unit and second scan unit both operate with the same basic structure, using intermediate nodes to pass signals to different row groups. This modular universal design increases row coverage capability while avoiding the complexity of designing specialized circuits for each row group.
Solution Approach 2:
The gate driving circuit employs a nested structure where scan units are organized in stages with intermediate nodes. The first scan unit outputs signals to intermediate nodes, which then feed into the second scan unit. This nested arrangement allows multiple scan units to share common signal paths and control logic, increasing versatility while managing circuit complexity through hierarchical organization.
Data Source
AI summary
A scan circuit is provided. The scan circuit includes a plurality of stages. A respective stage of the scan circuit includes a first scan unit and a second scan unit configured to provide control signals to different rows of subpixels. Output from the first scan unit is input to the second scan unit through one of M rows of subpixels. M is an integer ≥2.