Scan Circuit Unit for Compact Gate Drive Circuits
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Solution Overview
Problem
The increasing size and pixel resolution of display panels pose challenges in designing gate drive circuits with compact structures and reduced power consumption, as existing designs require more shift register units to supply scan signals to multiple scan lines.
Innovation Solution
A scan circuit unit comprising a shift register unit and two sets of transistors that generate and output two scan signals with opposite phases, allowing for reduced shift register units in the gate driver, thereby minimizing footprint and power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If more shift register units are used to supply scan signals to more scan lines, then the display panel size and pixel resolution can be increased, but the gate drive circuit footprint and power consumption increase
Solution Approach 1:
The patent combines the functions of multiple shift register units into a single unit by using one shift register unit to generate multiple scan signals (first scan signal and second scan signal) that are supplied to different groups of scan lines. This merging approach reduces the total number of shift register units required, thereby reducing the gate drive circuit footprint while maintaining the capability to drive larger display panels with higher pixel resolution
Solution Approach 2:
The single shift register unit is designed to perform multiple functions by generating different scan signals (first scan signal for first group of scan lines, second scan signal for second group of scan lines) through its output terminals. This multi-functionality allows one shift register unit to replace what would traditionally require multiple separate units, reducing overall circuit complexity and area
2Measurement precision
If more shift register units are used to supply scan signals to more scan lines, then the display panel size and pixel resolution can be increased, but the power consumption increases
Solution Approach 1:
By merging the functionality of multiple shift register units into one, the patent reduces the total number of active components that consume power. The single shift register unit generates multiple scan signals that would otherwise require multiple separate units, thereby reducing overall power consumption while supporting larger display panels with higher pixel resolution
Solution Approach 2:
The shift register unit is designed with multi-functionality to generate different scan signals (first scan signal and second scan signal) for different groups of scan lines. This universal design allows one unit to perform the work of multiple units, reducing the cumulative power consumption of the gate drive circuit while maintaining the ability to drive high-resolution displays
3Area of stationary object
If the gate drive circuit structure is made more compact, then the footprint is reduced, but the design complexity increases
Solution Approach 1:
The patent achieves circuit compactness by merging multiple shift register units into one, which naturally reduces footprint. The complexity management is achieved by using systematic signal distribution where the single shift register unit's outputs are routed to multiple scan line groups through a structured approach, balancing compactness with manageable design complexity
Data Source
AI summary
A scan circuit unit includes a shift register unit; a first set of transistors operable to selectively transfer a first clock signal to a first output terminal in dependence on an output pulse signal of the shift register unit, and to selectively transfer an inactive level voltage to the first output terminal in dependence on a second clock signal; and a second set of transistors operable to selectively transfer the second clock signal to a second output terminal in dependence on the output pulse signal, and to selectively transfer the inactive level voltage to the second output terminal in dependence on the first clock signal.