Display Refresh Rate Adjustment for Power Optimization

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Solution Overview

Problem

Existing display technologies face limitations in adjusting refresh rates, leading to inefficiencies in power consumption due to the need for frequent image updates, which can result in flickering and increased power usage.

Innovation Solution

A system and method for dynamically adjusting the refresh rate of displays based on identified aspects of content, such as differences between images, ambient light, and display characteristics, to optimize power savings without degrading the user's viewing experience.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the refresh rate is increased to avoid flickering, then the display quality is improved, but the power consumption increases

Engineering Contradiction:
Improvedisplay qualityVSAvoidpower consumption
Core Design Contradiction:
ReliabilityVSUse of energy by moving object

Solution Approach 1:

The system dynamically adjusts the refresh rate based on the type of content being displayed. For static or slowly changing content, it lowers the refresh rate to save power, while for dynamic content it maintains higher refresh rates to prevent flickering. This dynamic adaptation resolves the contradiction by making the refresh rate flexible rather than fixed.

Inventive Principle:
Principle #15Dynamics

Solution Approach 2:

The system changes the refresh rate parameter according to the content characteristics. By analyzing whether the displayed content is static, slowly changing, or rapidly changing, the system adjusts the refresh rate parameter accordingly, thereby optimizing both display quality and power consumption.

Inventive Principle:
Principle #35Parameter changes

2Use of energy by moving object

If the refresh rate is decreased to save power, then the power consumption is reduced, but the display may flicker

Engineering Contradiction:
Improvepower consumptionVSAvoiddisplay quality
Core Design Contradiction:
Use of energy by moving objectVSReliability

Solution Approach 1:

The system uses dynamic adjustment to lower the refresh rate only when the content is static or slowly changing, where flickering is not perceptible. When content becomes dynamic, the system automatically increases the refresh rate to maintain display quality, thus resolving the contradiction between power savings and flicker prevention.

Inventive Principle:
Principle #15Dynamics

Solution Approach 2:

The system monitors the content being displayed and uses this feedback to determine the appropriate refresh rate. By continuously analyzing content characteristics, the system provides feedback-based adjustment that ensures the refresh rate is optimized for both power consumption and display quality under different conditions.

Inventive Principle:
Principle #23Feedback

3Reliability

If the refresh rate is set high for all content types, then the display quality is maintained, but power is wasted on static content

Engineering Contradiction:
Improvedisplay qualityVSAvoidpower waste
Core Design Contradiction:
ReliabilityVSLoss of energy

Solution Approach 1:

The system segments the display content into different categories (static, slowly changing, rapidly changing) and applies different refresh rates to each segment or time period. This segmentation allows the system to avoid wasting power on static content while maintaining high refresh rates only when necessary for dynamic content.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The system applies partial action by using a high refresh rate only partially - specifically, only when the content requires it. For static or slowly changing content, it uses a lower refresh rate, thereby avoiding excessive power consumption while maintaining display quality when needed.

Inventive Principle:
Principle #16Partial or excessive action

Data Source

PatentUS8654132B2System, method and computer program product for adjusting a refresh rate of a display
Publication Date: 2014.02.18 NVIDIA CORP
  • US8654132B2 patent drawing
  • US8654132B2 patent drawing
  • US8654132B2 patent drawing

AI summary

A display refresh system, method and computer program product are provided. In use, at least one aspect of a display of content is identified by monitoring commands. Based on such identified aspect(s), a refresh rate of a display utilized for the display of the content may be adjusted.