Display Panel Shift Register Layout for Flexible Local Refresh
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Solution Overview
Problem
Existing display panel technologies face challenges in efficiently controlling the drive circuit on the array substrate, particularly in terms of flexibility in refresh frequency adjustment and power consumption, especially with the integration of shift register units.
Innovation Solution
The implementation of a shift register unit with multiple output circuits and transistors, including first and second output transistors, input, control, and cascade subcircuits, allows for flexible control of gate scanning signals and reduces power consumption by enabling full-screen or local driving modes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple cascaded shift register units are used to form scan drive, then the drive control capability is improved, but the power consumption increases
Solution Approach 1:
The display panel is divided into multiple display regions, each with independent drive control through separate output control signal lines. Each shift register unit can be independently controlled to drive specific regions, allowing selective activation of only the necessary portions of the display, thereby reducing overall power consumption while maintaining comprehensive drive control capability.
Solution Approach 2:
The system dynamically adjusts the operating state of shift register units based on display needs. By controlling output control signal lines to selectively enable or disable specific shift register units, the system adapts power consumption to actual display requirements, activating only the portions needed at any given time rather than continuously powering all units.
2Device complexity
If shift register units are integrated on array substrate (GOA), then the device complexity is reduced, but the flexibility in refresh frequency adjustment is limited
Solution Approach 1:
Each shift register unit is designed with multi-functional output control capabilities through the output control signal terminal and output circuit. The same integrated shift register unit can adapt to different refresh frequency requirements by receiving different control signals, enabling a single integrated structure to serve multiple refresh rate functions without requiring separate dedicated circuits for each frequency.
Solution Approach 2:
The system changes operational parameters of the integrated shift register units through control signals. By adjusting the state of output control signal lines, the refresh frequency and driving mode (full-screen or local) can be dynamically modified, allowing the integrated GOA structure to achieve flexible parameter adjustment despite its compact design.
3Adaptability or versatility
If output control signal lines are arranged between shift register unit and display area, then the control flexibility is improved, but the signal line complexity increases
Solution Approach 1:
Multiple output control signal lines are merged into a unified control architecture where each line corresponds to a specific shift register unit. This systematic arrangement, while increasing the number of lines, organizes them in a regular pattern that simplifies routing and control logic, balancing the need for individual unit control with overall system manageability.
Data Source
AI summary
A display panel, a display device, and a driving control method. The display panel includes a shift register unit and output control signal lines coupled to the shift register unit. The output control signal lines are arranged between the shift register unit and a display region of the display panel. The shift register unit includes: a shift register, which is configured to output a cascade signal by a cascade output end; and an output circuit, which is coupled to the shift register, the output circuit being configured to control, according to a signal of an output control signal end and a signal of a first reference signal end, a driving output end to output a gate scanning signal; an output control signal end is coupled to one of output control signal lines.