Display Panel Driver Frequency Optimization
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Solution Overview
Problem
Conventional display devices using multi-frequency driving technology do not effectively minimize power consumption when a still image is displayed in a partial region, as they unconditionally drive the entire still image region at a single low frequency, leading to suboptimal power reduction.
Innovation Solution
A display device and method that calculate and compare the consumption power required to drive a display panel at different frequencies for partial regions, determining whether to drive a still image region at a normal frequency or a low frequency to minimize overall power consumption, by dividing the still image region into sub-regions with varying driving frequencies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the entire still image region is driven at a single low frequency, then the device complexity is reduced, but the power consumption cannot be minimized
Solution Approach 1:
The still image region is divided into multiple sub-regions (first still image sub-region and second still image sub-region), each driven at different low frequencies. This segmentation allows the system to reduce power consumption by applying lower frequencies to larger areas while maintaining necessary refresh rates in smaller areas, thereby optimizing energy usage without requiring complex global control mechanisms.
Solution Approach 2:
Different driving frequencies are applied to different sub-regions based on their specific requirements. The first still image sub-region is driven at a first low frequency while the second still image sub-region is driven at a second low frequency, allowing each local area to operate at the most energy-efficient frequency for its specific content and position, thus minimizing overall power consumption.
2Use of energy by moving object
If partial regions are driven at different frequencies, then power consumption can be reduced, but the device complexity increases
Solution Approach 1:
The display region is segmented into moving image regions and still image regions, with the still image regions further divided into sub-regions. This hierarchical segmentation enables multi-frequency driving that reduces power consumption while maintaining manageable control complexity through systematic region classification and frequency assignment.
Data Source
AI summary
A display device includes a display panel having a display region and a panel driver that drives the display panel based on input image data. The panel driver calculates a normal driving frequency for driving a first partial region and a low frequency for driving a second partial region when the input image data represents a moving image for the first partial region and represents a still image for the second partial region, calculates a consumption power required to drive the display panel when an entire section of the second partial region is driven at a same low frequency, calculates a consumption power required to drive the display panel when a partial section of the second partial region and a remaining section of the second partial region are driven at mutually different frequencies, and determines a driving frequency of the second partial region by comparing the consumption powers.