Display Timing Controller Flicker and Power Optimization
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Display apparatuses driven at low frequencies for still images may exhibit flicker, increasing the likelihood of flicker recognition by users, and concurrently experience higher power consumption.
Innovation Solution
A display apparatus and method that dynamically adjust the driving frequency based on a flicker index reduction rate corresponding to the dimming index of the backlight, switching between a higher frequency for moving images and a lower frequency for still images, with the lower frequency being set to minimize flicker recognition while optimizing power usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the display apparatus is driven at a low frequency for still images, then power consumption is reduced, but the possibility of recognizing flicker increases
Solution Approach 1:
The patent implements dynamic frequency adjustment by switching between a first frequency (for moving images) and a second frequency (for still images). The timing controller determines the image type and dynamically changes the driving frequency of the display panel and backlight, allowing the system to optimize power consumption for still images while maintaining higher frequency for moving images to avoid flicker perception.
Solution Approach 2:
The patent changes the driving frequency parameter based on image type. When displaying still images, the system switches to a lower second frequency to reduce power consumption, while maintaining the ability to switch to a higher first frequency when moving images are detected, thus balancing power efficiency and flicker avoidance through parameter optimization.
2Object-affected harmful factors
If the display apparatus is driven at a normal frequency for moving images, then flicker recognition is minimized, but power consumption increases
Solution Approach 1:
The system dynamically adjusts the driving frequency based on the type of image being displayed. The timing controller monitors image characteristics and switches between normal frequency (first frequency) for moving images to minimize flicker, and low frequency (second frequency) for still images to reduce power consumption, making the frequency adaptation dynamic rather than fixed.
Solution Approach 2:
The patent optimizes the driving frequency parameter according to image content. By changing the frequency parameter from the first frequency to the second frequency when still images are detected, the system achieves power savings without compromising flicker performance, as flicker is only a concern at normal viewing frequencies for moving content.
Data Source
AI summary
A display apparatus includes: a backlight to generate light; a display panel to display an image by utilizing the light; a driving part to provide image signals corresponding to the image to the display panel; and a timing controller to drive the backlight, to drive the driving part at a first frequency when the image is a moving image, and to drive the driving part at a second frequency lower than the first frequency when the image is a still image. The timing controller is to set the second frequency based on a value obtained by applying a reduction rate of a flicker index corresponding to a dimming index of the backlight to a flicker index of image signals of a previous frame.