Display Panel Multi-Frequency Modes for Consistent Image Quality
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Solution Overview
Problem
Existing electronic devices face challenges in managing power consumption when displaying multiple images simultaneously, leading to potential image quality differences due to changes in luminance.
Innovation Solution
The electronic device operates in a normal mode, multi-frequency mode, or refresh mode, with the display area divided into first and second areas operating at different frequencies, and includes a driving controller and host to manage luminance and image information, using a frame memory to store image data for seamless transitions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by stationary object
If the display area is divided into first and second display areas operating at different frequencies in multi-frequency mode, then power consumption is reduced, but image quality consistency deteriorates when luminance information changes
Solution Approach 1:
The display panel dynamically switches between multi-frequency mode and refresh mode based on luminance information changes. When luminance changes are detected, the system transitions from asymmetric multi-frequency operation to symmetric refresh mode operation, allowing the display to adapt its frequency characteristics to maintain image quality while preserving power efficiency during stable conditions
Solution Approach 2:
The driving frequency parameter is changed based on luminance information. In multi-frequency mode, different frequencies are applied to different display areas for power saving. When luminance changes occur, the system switches to refresh mode where all areas operate at the same frequency, effectively using parameter changes to resolve the contradiction between power consumption and image quality consistency
2Adaptability or versatility
If multiple images are displayed simultaneously in various fields, then device versatility is improved, but power consumption increases
Solution Approach 1:
Different display areas are assigned different driving frequencies based on their content requirements. The first display area operates at a first driving frequency while the second display area operates at a second driving frequency, allowing each region to be optimized for its specific function - maintaining high quality for dynamic content while saving power for static content
Solution Approach 2:
The system dynamically adjusts operating modes based on content type and luminance characteristics. By detecting whether displayed images require frequent updates or can remain static, the system switches between normal mode, multi-frequency mode, and refresh mode, enabling versatility in handling different display scenarios while managing power consumption
Data Source
AI summary
An electronic device includes a display panel that operates in a normal mode, a multi-frequency mode, or a refresh mode, a driving controller, and a host generating and outputting a luminance information. In the multi-frequency mode, a display area defined in the display panel is divided into a first display area and a second display area, and the driving controller controls the first display area and the second display area so as to operate at different frequencies. In the normal mode, the driving controller controls the display area so as to operate at a normal frequency. In the refresh mode, the driving controller controls the display area so as to operate at the normal frequency during one frame. When the luminance information changes, the display panel operates in the refresh mode.