Dual-Output Shift Register for Narrow Frame Display Devices
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Solution Overview
Problem
Existing gate driving circuits for display devices, such as LCDs, have a large number of shift registers, which increases the size and power consumption of the device, making it difficult to narrow the frame and reduce the number of switching devices and signal lines.
Innovation Solution
A shift register design that includes an input unit, control units, a voltage gating unit, an energy storage unit, and a reset unit, allowing for the simultaneous output of two pulse signals with fewer electronic elements, reducing the number of shift registers and signal lines required in the gate driving circuit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a large number of shift registers are used in the gate driving circuit, then the display device can drive more rows of pixels, but the frame size increases and the number of switching devices and signal lines increases
Solution Approach 1:
Each shift register is designed to output two pulse signals simultaneously through dual output terminals, enabling one shift register to drive two rows of pixels. This multi-functionality reduces the total number of shift registers needed in the gate driving circuit, thereby decreasing the number of switching devices and signal lines while maintaining the capability to drive multiple rows of pixels.
Solution Approach 2:
The patent combines multiple functions into a single shift register unit by integrating dual output capabilities. The first and second output terminals are connected to different rows of pixel switches, merging the driving function for multiple rows into one circuit unit, thus reducing overall circuit complexity.
2Adaptability or versatility
If a large number of shift registers are used in the gate driving circuit, then the display device can drive more rows of pixels, but the frame size increases
Solution Approach 1:
By designing each shift register to serve dual purposes (driving two rows of pixels simultaneously), the patent reduces the total count of shift register units needed. This reduction directly decreases the horizontal dimension of the gate driving circuit, thereby narrowing the frame size of the display device while maintaining full driving capability.
3Adaptability or versatility
If a large number of shift registers are used in the gate driving circuit, then the display device can drive more rows of pixels, but power consumption increases
Solution Approach 1:
The dual-output shift register design enables each circuit unit to drive two rows of pixels, effectively halving the number of shift registers required. Since each shift register consumes power, reducing their quantity directly lowers the total power consumption of the gate driving circuit while preserving the ability to drive the same number of pixel rows.
Data Source
AI summary
A shift register, a gate driving circuit, and a display device are provided. The shift register includes an input unit, a first control unit, a second control unit, a voltage gating unit, an output unit, an energy storage unit and a reset unit. The shift register can output dual driving signals with fewer switching elements. When it is applied to the gate driving circuit, the total number of switching elements included in the gate driving circuit can be reduced, the wiring can be simplified, and the area occupied by the gate driving circuit can be decreased, thereby facilitating narrowing to the frame of the display device.