Display Controller Image Data Comparison for Power and Response
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing display devices face challenges in maintaining a responsive rendering update while reducing power consumption, particularly due to the delayed response caused by timer-based rendering time measurement and inflexibility in handling changes in image data.
Innovation Solution
A display control device comprising a host controller and a display controller that determines whether image data needs to be updated by comparing first and second image data, allowing for reduced power consumption by only updating when necessary and maintaining a favorable response time through adjustable frequency and count threshold settings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by stationary object
If a timer measures the rendering time to reduce drive frequency, then power consumption is reduced, but the response of rendering update is delayed
Solution Approach 1:
The patent replaces the timer-based mechanical measurement system with an image data comparison-based logical determination system. Instead of using a timer to measure rendering time and determine when to update, the display controller directly compares current image data with previously displayed image data to determine whether an update is needed. This substitution eliminates the time delay inherent in timer-based systems while achieving the same power-saving effect by avoiding unnecessary updates.
Solution Approach 2:
The patent introduces image data comparison as an intermediary mechanism between the host controller and display panel. The display controller acts as an intermediary that receives image data from the host controller, compares it with previously displayed data, and only forwards updated data to the display panel. This intermediary comparison step enables intelligent update decision-making that reduces power consumption without delaying the actual rendering update response.
2Use of energy by stationary object
If a timer measures the rendering time, then the drive frequency can be reduced, but it is difficult to flexibly deal with changes in image data to perform the rendering update
Solution Approach 1:
The patent replaces the rigid timer-based control mechanism with a flexible image data comparison-based control mechanism. Instead of being constrained by fixed time intervals, the system can now adaptively respond to actual image data changes. The display controller compares incoming image data with previously displayed data and performs updates only when necessary, providing flexibility to handle various types of image data changes (such as partial updates, full screen updates, or no updates) without being bound by a predetermined timing schedule.
Solution Approach 2:
The patent introduces dynamic adaptability into the display update process by making the update decision dependent on the actual content of the image data rather than a fixed time schedule. The system dynamically adjusts its behavior based on whether image data has changed, allowing it to respond flexibly to different scenarios such as static images (no update needed), partially changed images (selective update), or fully changed images (complete update). This dynamic approach enhances versatility while maintaining power efficiency.
Data Source
AI summary
A display control device that controls a display device including a display panel on which an image is rendered to display the image, the display control device includes: a host controller that obtains or generates image data of the image; and a display controller that outputs the image data to the display panel, wherein the host controller issues a request for rendering update of the image to the display controller, and transfers the image data to the display controller at a predetermined frequency; and when the display controller outputs first image data to the display panel, and then second image data is transferred from the host controller to the display controller, the display controller determines whether the first image data and the second image data are same or different from each other to determine whether or not the second image data is to be output to the display panel.