Partial Region Display Driving with Variable Frequency Transition
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Solution Overview
Problem
Conventional display devices using multi-frequency driving techniques struggle to reduce power consumption when displaying still images in partial regions, as the boundary between different frequency-driven areas can be perceived by users, leading to increased power consumption.
Innovation Solution
A display device and method that perform normal frequency driving on moving image regions and low frequency driving on still image regions, with a variable frequency driving operation in the adjacent area, gradually decreasing from normal to low frequency, to prevent the boundary from being visible.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If multi-frequency driving is applied to drive partial regions at different frequencies, then power consumption is reduced, but a boundary between partial regions becomes visible to users
Solution Approach 1:
The patent applies different driving frequencies to different regions of the display panel based on local image characteristics. The still image region is driven at a low frequency while the moving image region is driven at a normal frequency, optimizing power consumption for each region's specific requirements.
Solution Approach 2:
An adjacent region is introduced as an intermediary zone between the still image region and moving image region. This adjacent region is driven at a frequency intermediate between the low frequency and normal frequency, serving as a transition zone that prevents the boundary from being visible to users.
2Reliability
If the entire display panel is driven at normal frequency, then image quality is maintained, but power consumption increases
Solution Approach 1:
The display panel is segmented into multiple regions with different driving frequencies based on image content analysis. The still image region is driven at low frequency to reduce power consumption, while the moving image region is driven at normal frequency to maintain image quality.
Solution Approach 2:
The display device periodically analyzes input image data to identify still image regions and moving image regions, then applies corresponding driving frequencies. This periodic analysis and adaptive frequency adjustment maintains image quality while optimizing power consumption.
3Loss of energy
If low frequency driving is applied to still image regions, then power consumption is reduced, but the still image must occupy the entire display panel
Solution Approach 1:
The display panel is divided into distinct regions (still image region, moving image region, and adjacent region) based on image content analysis. This segmentation allows low frequency driving to be applied selectively to still image regions while maintaining normal frequency in moving image regions, enabling flexible partial region display.
Solution Approach 2:
The driving frequency of each region is dynamically adjusted based on the detected image content. The panel driver continuously analyzes input image data and adapts the driving frequency of each region accordingly, providing versatile display capabilities for different image scenarios.
Data Source
AI summary
A display device includes a display panel and a panel driver. In a case where input image data represents a moving image with respect to a first partial region and represents a still image with respect to a second partial region, the panel driver performs a normal frequency driving operation on the first partial region, and performs a low frequency driving operation on the second partial region. In a standby mode, after the normal frequency driving operation and the low frequency driving operation are performed on the first partial region and the second partial region, respectively, the panel driver sets a portion of the second partial region adjacent to the first partial region as an adjacent region, performs the low frequency driving operation on the first partial region and the second partial region except for the adjacent region, and performs a variable frequency driving operation on the adjacent region.