Display Panel Shift Register Layout for Narrow-Frame Frequency Division
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Solution Overview
Problem
The gate drive circuit required for zone-by-zone frequency division in display panels occupies a large frame space, making it difficult to achieve a narrow frame design due to the need for multiple shift register circuits and gating circuits, which increases the complexity and layout space.
Innovation Solution
A display panel design that includes cascaded first shift registers with integrated first and second gating circuits, allowing for different output times of gate control signals, reducing the need for separate driving circuits and minimizing the frame space.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple shift register circuits and gating circuits are used to achieve zone-by-zone frequency division, then the frequency division functionality is improved, but the frame space and device complexity increase
Solution Approach 1:
The patent combines the first gating circuit and second gating circuit into a single integrated gating circuit structure. The first gating circuit includes a first transistor and the second gating circuit includes a second transistor, both controlled by the same gate control signal. This merging reduces the number of separate driving circuits needed while maintaining the zone-by-zone frequency division functionality through different transistor configurations within the unified gating circuit.
Solution Approach 2:
The integrated gating circuit serves multiple functions: it acts as both the first gating circuit and second gating circuit, controls both the first transistor and second transistor, and enables zone-by-zone frequency division. The gate control signal simultaneously controls the switching of both transistors, allowing a single circuit to perform what would traditionally require separate driving circuits.
2Adaptability or versatility
If multiple shift register circuits and gating circuits are used to achieve zone-by-zone frequency division, then the frequency division functionality is improved, but the frame space increases
Solution Approach 1:
The patent merges the first gating circuit and second gating circuit into a single integrated gating circuit, reducing the overall layout area. By combining multiple circuit functions into one structure with shared control signals and transistors, the frame space required for zone-by-zone frequency division is significantly reduced compared to using separate independent circuits.
Solution Approach 2:
The patent utilizes vertical stacking of transistors and circuits in the display panel structure. The first transistor and second transistor are arranged in a vertical sequence within the integrated gating circuit, allowing multiple functional elements to occupy the same horizontal footprint but different vertical layers, thereby reducing the overall frame space occupation.
3Reliability
If separate driving circuits are used for each gating function, then the control precision is improved, but the number of driving circuits increases
Solution Approach 1:
The integrated gating circuit is designed to perform multiple gating functions simultaneously. The gate control signal controls both the first transistor and second transistor, enabling the single circuit to provide precise control for zone-by-zone frequency division while reducing the total number of driving circuits needed in the system.
Data Source
AI summary
A display panel and a display device are provided. The display panel includes: a plurality of cascaded first shift registers. One of the plurality of first shift registers includes a first driving circuit, a first gating circuit and a second gating circuit. An output terminal of the i-th-level first driving circuit is electrically connected to an input terminal of the (i+1)-th-level first driving circuit, an input terminal of the i-th-level first gating circuit, and an input terminal of the i-th-level second gating circuit, respectively, where i≥1. One first gating circuit outputs a first gate control signal, and one second gating circuit outputs a second gate control signal. In one first shift registers of a same level, output times of effective pulses of the first gate control signal and the second gate control signal are different.