Display Driving Controller Frequency Adaptation for Flicker Reduction
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Solution Overview
Problem
Existing display technologies face challenges in minimizing power consumption while maintaining display quality, particularly when displaying still images, as reducing the frequency to conserve power can lead to flicker and decreased image quality.
Innovation Solution
A display apparatus and method that includes a driving controller capable of determining the driving mode and frequency of a display panel based on input image data, using a flicker value storage to optimize the driving frequency for different grayscale values, thereby reducing power consumption and preventing flicker.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the display panel is driven at low frequency to reduce power consumption, then power consumption is reduced, but flicker is generated and display quality decreases
Solution Approach 1:
The display apparatus dynamically adjusts the driving frequency based on the grayscale values of the displayed image. When grayscale values indicate low flicker risk, the system operates at reduced frequency to save power; when grayscale values indicate high flicker risk, the system increases frequency to prevent flicker, thus adaptively optimizing both power consumption and display quality
Solution Approach 2:
The system changes the driving frequency parameter according to the grayscale values of the displayed content. By mapping different grayscale ranges to different driving frequencies, the system optimizes the balance between power consumption and display quality based on the actual image content being displayed
2Reliability
If the display panel is driven at normal frequency to maintain display quality, then display quality is maintained, but power consumption increases
Solution Approach 1:
The system transitions from static normal frequency operation to dynamic frequency adjustment. By continuously monitoring grayscale values and adapting the driving frequency accordingly, the system maintains display quality when necessary while reducing power consumption during appropriate conditions
Solution Approach 2:
The driving frequency parameter is adjusted based on grayscale value analysis. The system identifies grayscale ranges that are more susceptible to flicker and applies higher frequencies only to those ranges, while using lower frequencies for ranges less susceptible to flicker, thus optimizing power consumption while maintaining quality
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 a gate line of the display panel. The data driver outputs a data voltage to a data line of the display panel. The driving controller is configured to control an operation of the gate driver and an operation of the data driver, to determine a driving mode of the display apparatus among one of a normal driving mode and a low frequency driving mode, and to determine a driving frequency of the display panel based on the input image data. The driving controller includes a flicker value storage configured to store flicker values for a part of grayscale values among all of grayscale values of the input image data.