Display Driving Method for Power Reduction
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Solution Overview
Problem
In large-sized display devices, power consumption remains constant even when only a partial region is displaying a motion picture, as all pixels operate at a constant frequency, leading to inefficiency in energy usage.
Innovation Solution
A driving method that differentiates between motion picture and still image display pixel rows by comparing image data frames, driving motion picture rows at a higher frequency and still image rows at a lower frequency, with adjacent still image rows operated at a higher frequency than those farther away from motion picture rows, to optimize power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If all pixels are operated at a constant frequency in large-sized display devices, then the motion picture display quality is maintained, but the power consumption cannot be reduced even when only a partial region displays motion pictures
Solution Approach 1:
The display device divides the pixel array into multiple regions (first region displaying motion pictures, second region displaying still images) and applies different driving frequencies to each region. This segmentation allows the system to reduce power consumption in still image regions by operating at lower frequencies while maintaining high frequency operation in motion picture regions, directly resolving the contradiction between power efficiency and display adaptability.
Solution Approach 2:
The system dynamically adjusts the driving frequency for different pixel regions based on the type of content being displayed. By detecting whether each region displays motion pictures or still images, the system can vary the operating frequency in real-time, enabling power consumption reduction without compromising the quality of motion picture display in regions where it is required.
2Use of energy by moving object
If the display frequency is reduced for still image regions, then power consumption is reduced, but the image quality and refresh performance may deteriorate
Solution Approach 1:
The patent applies different driving frequencies to different spatial regions of the display based on local content characteristics. Still image regions operate at lower frequencies to save power, while motion picture regions maintain higher frequencies for quality display. This local differentiation ensures that image quality is preserved where needed while achieving power savings in regions where lower refresh rates are acceptable.
Solution Approach 2:
The system changes the operating frequency parameter dynamically based on the detected content type in each region. By adjusting this critical parameter according to actual display needs, the system optimizes the balance between power consumption and image quality, ensuring reliable display performance for motion pictures while reducing power usage for static content.
Data Source
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AI summary
A driving method of a display device includes: determining each of a plurality of pixel rows of the display device as one of a motion picture display pixel row and a still image display pixel row by comparing image data of each of the pixel rows in a current frame and in a previous frame; and driving the motion picture display pixel row with a motion picture frequency and driving the still image display pixel row with a still image display frequency, which is lower than or equal to the motion picture frequency, where a plurality of still image display pixel rows are driven with at least two still image display frequencies.