Shift Register Unit Low Power Mode for Display Panels
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Solution Overview
Problem
In display technology, shift register units in gate driving circuits continue to consume power even when the display panel is in a screen saver state, leading to increased energy usage as they maintain a normal display working state and scan all regions of the panel.
Innovation Solution
A shift register unit comprising an input circuit, first and second pull-down circuits, and an output circuit, where the first pull-down circuit pulls down the level of the pull-up node, and the second pull-down circuit pulls down the level of the output terminal, allowing the unit to enter a low power consumption mode by controlling the pull-up and output nodes to a low level, reducing power consumption when the display panel is in a screen saver state.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the shift register unit maintains normal display working state, then the display function is ensured, but the power consumption increases during screen saver state
Solution Approach 1:
The shift register unit dynamically adjusts its operating state based on display needs. During screen saver state, the circuit transitions from normal scanning operation to a low-power state by pulling down the pull-up node and output terminal through controlled transistor activation, reducing power consumption while maintaining the ability to resume normal operation when needed.
2Productivity
If the shift register unit scans all regions of the panel, then the display coverage is complete, but the energy usage increases
Solution Approach 1:
The display panel is segmented into active scanning regions and screen saver regions. The shift register unit can selectively activate only the necessary portions of the circuitry based on which regions require display updates, allowing complete display coverage when needed while minimizing energy usage during screen saver state by deactivating segments that don't require scanning.
Data Source
AI summary
A shift register unit and a driving method thereof, a gate driving circuit and a display apparatus. The shift register unit includes an input circuit, a first pull-down circuit, a second pull-down circuit, and an output circuit. In a first state, the first pull-down circuit is configured to pull down the level of a pull-up node, and the second pull-down circuit is configured to pull down a level of the output terminal.