Display Device Partial Region Refresh Rate Control
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Solution Overview
Problem
Conventional display devices unnecessarily refresh entire screens at a constant rate, leading to excessive power consumption, especially in regions where content changes infrequently, such as those displaying static information like time or battery level on smartphones.
Innovation Solution
A display device configuration that refreshes only the main region at a high rate (e.g., 60 Hz) and the extended region at a lower rate (e.g., once per second), using a display processing section to transmit image data accordingly, thereby reducing unnecessary refreshes and power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the entire display screen is refreshed at a constant high refresh rate, then the video quality and smoothness are improved, but the power consumption increases unnecessarily in regions where content changes infrequently
Solution Approach 1:
The display screen is divided into multiple regions (first region and second region) with different refresh rate requirements. The control circuit identifies static content regions and applies a lower refresh rate to them, while maintaining a higher refresh rate for dynamic content regions, thus resolving the contradiction between power consumption and display quality
Solution Approach 2:
Different regions of the display screen are assigned different refresh rates based on their content characteristics. The first region (with frequently changing content) receives a higher refresh rate while the second region (with infrequently changing content) receives a lower refresh rate, optimizing both power consumption and display quality locally
2Productivity
If the entire display screen is refreshed at a constant high refresh rate, then the video smoothness is improved, but the data transmission volume increases unnecessarily
Solution Approach 1:
The display area is segmented into regions with different refresh rate requirements. By refreshing only the necessary regions at high rates and others at lower rates, the total data transmission volume is reduced while maintaining video refresh efficiency where needed
Solution Approach 2:
Instead of refreshing the entire screen at a constant high rate, the system applies partial action by refreshing only the regions that require it at high rates, while using lower rates for regions where full refresh is excessive, thus optimizing data transmission efficiency
Data Source
AI summary
The present invention provides a display device (smartphone (3)) that realizes less power consumption for refreshing a video. The smartphone (3) includes: a host (2) configured to obtain image data which is to be supplied to an LCD panel (31); and a driver (32) configured to transmit, to the LCD panel (31), the image data so as to refresh a video which is displayed by the display panel, the driver (32) being configured to refresh a video, displayed on an extended region (312), at a refresh rate lower than that at which the driver (32) refreshes data displayed on a main region (311).