Gate Driver Frequency Control for Still Image Power Reduction
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Solution Overview
Problem
Conventional display devices experience excessive power consumption when displaying still images, as they repeatedly receive the same image signal for each frame, leading to inefficient power usage and potential display defects.
Innovation Solution
A display device and method that includes a gate driver to scan gate lines for a still image section, with a first hold section and a first refresh section, and a signal controller to control data drivers for efficient data voltage transmission, reducing power consumption by altering the gate signal transmission frequency during still image display.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by stationary object
If conventional signal controllers repeatedly receive the same input image signal for each frame to display still images, then the display panel can maintain image display function, but excessive power consumption occurs
Solution Approach 1:
The patent applies periodic action by dividing the still image display period into hold sections and refresh sections. During hold sections, the gate driver stops scanning gate lines and data driver stops transmitting data voltages, achieving periodic idle periods that reduce power consumption while maintaining still image display. This resolves the contradiction by introducing periodic non-operational phases into the continuous display process.
Solution Approach 2:
The patent implements dynamics by making the gate driver and data driver operable only during specific time periods (refresh sections) instead of continuously operating. The drivers dynamically adjust their operational state between active (during refresh) and idle (during hold) periods, optimizing power consumption while maintaining display functionality. This dynamic operation resolves the contradiction between continuous operation and power savings.
2Reliability
If the gate driver scans gate lines at high frequency to ensure image quality, then display quality is maintained, but power consumption increases
Solution Approach 1:
The patent applies periodic action by implementing periodic gate line scanning only during refresh sections rather than continuously. The gate driver scans gate lines at high frequency during refresh sections to maintain display quality, then enters idle state during hold sections. This periodic scanning pattern maintains reliability during critical refresh periods while reducing overall power consumption through idle periods.
Solution Approach 2:
The patent segments the display time period into distinct hold sections and refresh sections. During refresh sections, the gate driver operates at high frequency to ensure display quality. During hold sections, operation is suspended. This temporal segmentation allows the system to maintain high performance when needed while conserving energy during periods when full performance is not required.
Data Source
AI summary
A method to drive a display device includes: transmitting at least one data voltage to one or more of a plurality of data lines, scanning one or more of a plurality of gate lines to enable transmission of a gate signal in association with a first frame of a first hold section of a first still image section associated with display of a still image, and scanning one or more of the plurality of gate lines to enable transmission of the gate signal every frame of a first refresh section. The first still image section comprises the first refresh section.