Display Driving Controller Flicker Reduction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing display apparatuses face challenges in minimizing power consumption while maintaining display quality, as reducing power consumption through low frequency driving can lead to flicker effects, and increasing frequency to prevent flicker increases power consumption.
Innovation Solution
A display apparatus with a driving controller that selectively determines between normal and low frequency driving modes based on image data, using a flicker value storage and data remapper to adjust driving frequency and grayscale values, thereby reducing power consumption and preventing flicker.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by stationary object
If the display panel is driven in a relatively low frequency, then power consumption of the display panel is reduced, but flicker effect is generated so that display quality decreases
Solution Approach 1:
The display apparatus dynamically adjusts the driving frequency based on the type of image content being displayed. For still images, it uses low frequency driving to reduce power consumption, while for video images, it switches to normal frequency driving to maintain display quality and prevent flicker. This dynamic adaptation resolves the contradiction by making the system flexible rather than fixed.
Solution Approach 2:
The invention changes the driving frequency parameter according to the image type. By detecting whether the input image is a still image or video image, the system adjusts the driving frequency parameter accordingly - using low frequency for still images and normal frequency for video images - thereby optimizing both power consumption and display quality under different conditions.
2Reliability
If the display panel is driven in a high driving frequency to prevent flicker effect, then display quality is maintained, but power consumption cannot be sufficiently reduced
Solution Approach 1:
The system dynamically switches between normal driving mode and low frequency driving mode based on image content analysis. When video images are detected, it maintains normal high frequency driving to prevent flicker; when still images are detected, it transitions to low frequency driving to reduce power consumption. This dynamic behavior resolves the contradiction by adapting to different operational requirements.
Solution Approach 2:
The driving frequency parameter is changed based on the detected image type. For video images requiring high display quality, the system maintains normal driving frequency; for still images where flicker is less noticeable, it reduces the driving frequency to save power. This parameter adaptation resolves the contradiction between display quality and power consumption.
3Use of energy by stationary object
If grayscale values are converted to decrease the size of maximum frequency grayscale area, then power consumption is further reduced, but display precision may be affected
Solution Approach 1:
The data remapper applies different processing to different grayscale value ranges. It specifically targets and converts only the maximum frequency grayscale area (grayscale values that would require high frequency driving), while leaving other grayscale values unchanged. This localized processing reduces power consumption for specific problematic grayscale ranges without affecting the precision of other grayscale values.
Solution Approach 2:
The system changes the grayscale value parameter for specific ranges that cause high frequency driving requirements. By converting grayscale values in the maximum frequency grayscale area to adjacent values, it reduces the driving frequency needed for those specific grayscale levels, thereby reducing power consumption while maintaining overall display precision through selective rather than universal modification.
Data Source
AI summary
A display apparatus includes a display panel, a gate driver, a data driver, and a driving controller. The display panel displays an image based on input image data. The gate driver outputs a gate signal to the display panel. The data driver outputs a data voltage to the display panel. The driving controller selectively determines a driving mode of the display apparatus between one of a normal driving mode and a low frequency driving mode, and determines a driving frequency of the display panel based on the input image data. The driving controller includes a flicker value storage storing flicker values for grayscale values of the input image data and a data remapper converting the grayscale value of the input image data to decrease a size of a maximum frequency grayscale area corresponding to a maximum driving frequency in the low frequency driving mode.