Gate Driver Circuit Partial Scan for Display Power Reduction
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Solution Overview
Problem
In display technologies, existing methods consume unnecessary power by scanning the entire screen sequentially in standby or charging modes, where only a part of the screen needs to be displayed, leading to increased power consumption.
Innovation Solution
A method involving a display panel with a gate driver circuit, timing controller, and mode switching circuit that controls the scan signal to output to either all rows or a subset of adjacent rows based on operating mode, reducing power consumption by only scanning areas with displayed content.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by stationary object
If the gate driver circuit scans all N rows of gate lines sequentially in every operating mode, then the display can show content across the entire screen, but power is consumed unnecessarily when only a portion of the screen needs to be displayed
Solution Approach 1:
The patent implements dynamic scanning behavior that adapts to different operating modes. The gate driver circuit can switch between full-screen scanning (all N rows) and partial-screen scanning (m adjacent rows where m < N) based on the display requirements. This dynamic adjustment allows the system to consume less power when only a portion of the screen needs to be displayed, while maintaining the capability to display across the entire screen when needed.
2Use of energy by stationary object
If the gate driver circuit scans only m adjacent rows of gate lines in partial display mode, then power consumption is reduced, but the scanning mechanism must be made adaptable to different row ranges
Solution Approach 1:
The patent segments the gate lines into different scannable regions. Instead of treating all N gate lines as a single continuous scan sequence, the system can divide them and scan only the relevant segment (m adjacent rows) in partial display mode. This segmentation allows the gate driver circuit to reduce power consumption by activating only the necessary portion of the display while maintaining the infrastructure to scan the full screen when required.
Data Source
AI summary
A method for driving a display panel, a display panel, and a display device are provided, where in a first operating mode, a gate driver circuit is controlled for each image frame to output a scan signal to N rows of gate lines on the display panel sequentially in a preset scan direction to thereby display throughout a screen; and in a second operating mode, the gate driver circuit is controlled for each image frame to output a scan signal to m adjacent rows of gate lines on the display panel sequentially in the preset scan direction to thereby display only in an area corresponding to the m adjacent rows of gate lines without scanning the gate lines in an area in which no image may be displayed, so as to lower power consumption of the display panel operating in the second operating mode.