Shift Register Hybrid Pulses OLED Gate Drive Circuit
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Solution Overview
Problem
OLED gate drive circuits face challenges in generating waveforms with different cycles and pulse widths, leading to complex output waveforms and circuit structures, making it difficult to achieve efficient display and compensation.
Innovation Solution
A shift register design comprising a display control circuit, sensing control circuit, and output circuit, connected through pull-up nodes and control terminals, allowing for the writing and storage of potentials to generate hybrid pulses for display and compensation, with a cascaded structure of shift registers to simplify the circuit structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If OLED gate drive circuits use complex circuit structures to generate waveforms with different cycles and pulse widths, then the display and compensation functions can be realized, but the circuit structure becomes very complicated
Solution Approach 1:
The shift register circuit is designed to perform multiple functions including display signal output, compensation signal output, and sensing operations using a unified circuit structure. The same shift register can output different types of signals (display or compensation) based on control signals, eliminating the need for separate dedicated circuits for each function and thereby reducing overall circuit complexity while maintaining versatility
Solution Approach 2:
The circuit employs dynamic control mechanisms where control signals dynamically switch the operational mode of the shift register between display and compensation functions. The output waveform characteristics (cycle and pulse width) are dynamically adjusted through control signals rather than requiring fixed hardware configurations, enabling adaptability without increasing structural complexity
2Adaptability or versatility
If gate drive circuits are designed to output complex waveforms with different cycles and pulse widths, then display and compensation functions are achieved, but the output waveforms become complicated
Solution Approach 1:
The output waveform generation is segmented into distinct phases and control stages. The shift register divides the waveform generation process into sequential operations where different control signals manage different aspects of the output waveform (display phase vs. compensation phase), making the complex waveform generation process more manageable and controllable through structured segmentation
3Device complexity
If a unified shift register circuit is used for both display and compensation, then circuit structure is simplified, but the requirement for different waveform cycles and pulse widths must be met
Solution Approach 1:
The unified shift register circuit achieves waveform variation by changing operational parameters such as clock signal frequency, control signal timing, and register stage configuration rather than changing the physical circuit structure. This allows the same circuit to generate different waveform cycles and pulse widths by adjusting these parameters, maintaining structural simplicity while achieving the required adaptability
Data Source
AI summary
The invention provides a shift register, a drive method thereof, a gate drive circuit, and a display panel. Wherein, the shift register comprises: a display control circuit connected to a pull-up node, a first power terminal and a first control terminal; a sensing control circuit connected to the pull-up node, a second control terminal and a third control terminal and configured to store a potential of the pull-up node in a display mode under the control of the second control terminal and write the stored potential into the pull-up node in a sensing mode under the control of the third control terminal; and a first output circuit connected to the pull-up node, a first clock terminal and a first output terminal.