Gate Driving Circuit Multiplexer Elimination
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Solution Overview
Problem
The existing gate driving circuits for flat panel displays, particularly those implemented using the GIP method, require a multiplexer to select and supply gate signals, leading to increased layout area and bezel width, and switching element deterioration over time, which affects image display and panel manufacturing costs.
Innovation Solution
A gate driving circuit comprising multiple shift registers that sequentially output gate signals without a multiplexer, where each shift register is activated or deactivated based on specific logic level voltages, allowing for the selection and supply of distinct frequency gate signals directly to gate lines, reducing the need for a multiplexer and minimizing bezel area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a multiplexer is used to select gate signals from multiple shift registers, then gate signal selection capability is improved, but layout area and bezel width increase
Solution Approach 1:
The patent extracts and removes the multiplexer component from the gate driving circuit. Instead of using a multiplexer to select gate signals, the invention directly connects multiple shift registers to gate lines, eliminating the need for signal selection hardware and thereby reducing layout area.
Solution Approach 2:
The patent changes the operating parameters of shift registers by assigning different frequency divisors to each shift register. This allows each shift register to generate gate signals at different frequencies, enabling the circuit to serve multiple display panels with different refresh rates without requiring a multiplexer.
2Adaptability or versatility
If a multiplexer is used to select gate signals, then signal routing flexibility is improved, but switching element deterioration occurs over time
Solution Approach 1:
The patent removes the multiplexer and its switching elements from the circuit. By directly connecting shift registers to gate lines, the invention eliminates switching elements that would otherwise deteriorate over time, thereby improving reliability while maintaining signal routing flexibility through direct connections.
Solution Approach 2:
Each shift register independently generates and outputs gate signals to its connected gate lines without requiring selection by a multiplexer. This self-service approach eliminates the need for switching elements and allows each shift register to autonomously provide gate signals to display panels.
3Productivity
If multiple shift registers operate simultaneously, then gate signal generation capability is improved, but signal interference and loss occur
Solution Approach 1:
The patent assigns different frequency characteristics to each shift register output, creating local quality differences in the signals. Each shift register operates at a distinct frequency, which prevents signal interference and allows simultaneous operation of multiple shift registers without compromising signal integrity.
Solution Approach 2:
The patent changes the frequency parameter of gate signals generated by different shift registers. By assigning different frequency divisors to each shift register, the invention ensures that simultaneously operating shift registers produce signals at different frequencies, preventing interference and maintaining signal integrity.
Data Source
AI summary
An embodiments herein relate to a gate driving circuit and display device which include a plurality of shift registers. The gate driving circuit comprises: a plurality of shift registers, wherein each of the shift registers includes a plurality of stages which sequentially output a gate signal, wherein the stages of a kth shift register are activated when a kth SR selection signal generated as a first logic level voltage is input, and the stages of the kth shift register are not activated when the kth SR selection signal generated as a second logic level voltage is input, wherein k is a natural number equal to or less than the number of the shift registers.