Gate Drive Circuit Voltage Maintaining Unit Signal Integrity
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Solution Overview
Problem
Existing gate drive circuits in thin film transistor displays experience signal attenuation over long time intervals, leading to abnormal output, which affects the display's ability to maintain signal potential between gate drive signal outputs.
Innovation Solution
A gate drive circuit with voltage maintaining units between stages ensures that the input signal control terminal potential remains equal to the gate drive signal potential, using modules like input, voltage stabilization, and reset modules to maintain signal integrity across stages.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If the time interval between gate drive signal outputs from adjacent shift registers is increased to allow for multiple display periods, then the display can divide time for displaying one frame into multiple periods, but the input signal potential becomes attenuated and the output becomes abnormal
Solution Approach 1:
The voltage maintaining unit performs preliminary action by maintaining the potential of the input signal control terminal at a high level before the next gate drive signal is input. This preliminary potential maintenance ensures that when the next gate drive signal arrives after a long time interval, the input signal control terminal is already in the correct potential state to receive and process the signal properly, preventing attenuation and abnormal output
Solution Approach 2:
The voltage maintaining unit acts as an intermediary between the output of one shift register and the input control terminal of the next shift register. It mediates the potential transfer by using capacitors to store and maintain the potential level, ensuring that the signal integrity is preserved across the time interval between sequential gate drive signal outputs
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution prevents signal attenuation, ensuring normal output from gate drive sub-circuits regardless of the time interval between signal outputs, thereby maintaining signal integrity and stability.
Implementation Method 1
a voltage maintaining unit between the output end of the shift register of the last stage and the input control terminal of the shift register of the first stage of the next stage, where the voltage maintaining unit is configured to maintain the potential of the input control terminal of the shift register of the first stage of the next stage equal to the potential of the gate drive signal
Data Source
AI summary
There is provided a gate drive circuit, a display panel and a touch display apparatus. The gate drive circuit includes gate drive sub-circuits (1) of at least two stages, the gate drive sub-circuit of each stage including a plurality of shift registers (SR(1), SR(2), . . . , SR(N)) connected in cascade. In gate drive sub-circuit of each stage except the last stage, a signal output terminal of a shift register (SR(N)) of a last stage is connected with an input signal control terminal of a shift register (SR(1)) of a first stage in a gate drive sub-circuit of a next stage adjacent thereto via a voltage maintaining unit (2). The voltage maintaining unit (2) is configured to maintain, after a shift register of a last stage (SR(N)) in the gate drive sub-circuit of the previous stage connected thereto outputs the gate drive signal and before a shift register of a first stage(SR(1)) in the gate drive sub-circuit of the next stage connected thereto outputs the gate drive signal, the potential of an input signal control terminal of the shift register of the first stage in the gate drive sub-circuit of the next stage to be equal to the potential of the gate drive signal, so that the potential of the input signal control terminal does not attenuate with time, assuring that respective gate drive sub-circuits can output the signals normally.