Gate Driving Circuit Selective Scanning for AMOLED Power Reduction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In AMOLED display devices, especially in smart wearable devices, the power consumption is high due to the need for continuous scanning and data signal input across the entire display area, even in idle modes, which reduces the idle time and increases energy usage.
Innovation Solution
A gate driving circuit with a scanning interval selection unit using cascaded shift register units and five MOS transistors, where the scanning interval is controlled by reverse switch control signals, allowing for selective scanning of only the necessary display area in idle mode, reducing power consumption by omitting data signal input to non-display areas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by stationary object
If continuous scanning across the entire display area is performed, then the display function is maintained, but power consumption increases
Solution Approach 1:
The display area is divided into multiple scanning intervals, and only the required interval is scanned at any given time. The gate driving circuit is segmented into multiple shift register units (first to fourth units) that can be independently activated, allowing selective scanning of different display regions based on idle mode requirements.
Solution Approach 2:
The gate driving circuit dynamically adjusts the scanning interval based on the display mode. A mode selection signal controls whether to scan the first scanning interval (first display area) or the second scanning interval (second display area), enabling adaptive power consumption management while maintaining display functionality.
2Duration of action of stationary object
If the entire display area is scanned in idle mode, then complete display coverage is achieved, but idle time is reduced due to higher energy usage
Solution Approach 1:
In idle mode, only a partial scanning interval (either the first or second interval) is activated instead of scanning the entire display area. This partial action reduces energy consumption during idle periods, thereby extending the device's idle time while still maintaining necessary display coverage.
3Use of energy by stationary object
If data signals are input to all display areas, then complete image rendering is achieved, but power consumption increases
Solution Approach 1:
Data signals are input only to the local display area that requires updating, rather than to the entire display. The circuit selectively activates either the first or second scanning interval based on the mode selection signal, ensuring that image rendering quality is maintained for the active region while reducing power consumption by omitting data input to inactive regions.
Data Source
AI summary
A gate driving circuit, a TFT array substrate and a display device are provided by the present disclosure, wherein five switches are provided in the gate driving circuit and a control signal is used to directly or indirectly control the five switches, and further control scanning range of the gate driving circuit.