OLED Display Audio Control Using Active Pixel Ratio
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Solution Overview
Problem
Current display devices, particularly active matrix OLED displays, face challenges in efficiently managing power consumption while displaying images, as they do not effectively control background music volume based on image color or brightness.
Innovation Solution
A display device and driving method that incorporate a signal controller and volume controller to adjust the volume of background music by determining the ratio of active pixels to total pixels, allowing for multiple volume levels and reducing power consumption by maintaining a constant volume until a predetermined reference value is reached, then reducing volume level-by-level as the ratio increases.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the volume of background music is controlled based on the ratio of active pixels to total pixels, then power consumption is reduced, but the device complexity increases due to the addition of signal controller and volume controller components
Solution Approach 1:
The signal controller performs multiple functions: it processes video signals for display and simultaneously generates on-pixel signals by counting active pixels to provide data for volume control. This multi-functionality reduces the need for separate dedicated components, thereby reducing overall device complexity while maintaining the power consumption reduction benefit
Solution Approach 2:
The volume controller implements a feedback mechanism where it continuously monitors the on-pixel signal representing the ratio of active pixels, compares this ratio against predetermined reference values, and dynamically adjusts the background music volume accordingly. This closed-loop feedback system enables automatic power optimization without requiring complex manual control mechanisms
2Adaptability or versatility
If multiple volume levels are defined based on predetermined ratio ranges, then the adaptability to different display conditions is improved, but the device complexity increases due to the need for range determination and volume level mapping
Solution Approach 1:
The system divides the range of active pixel ratios into multiple predetermined ratio ranges, each corresponding to a specific volume level. As the active pixel ratio parameter changes, the system automatically transitions between volume levels. This parameter-based approach provides high adaptability to different display conditions while maintaining simple control logic through predefined thresholds and ranges
Data Source
AI summary
A display device and a method of driving the display, wherein the volume of background music is controlled depending upon the color or brightness of display images, and the power consumption is reduced. The display device includes a display unit with a plurality of pixels, a signal controller, and a volume controller. The display unit displays images by selectively activating pixels from among the plurality of pixels in accordance with input video signals and input image control signals. The signal controller reads the input video signals to generate on-pixel signals having information about the ratio of a number of the active pixels compared to a total number of pixels in the plurality of pixels per each frame. The volume controller determines a range from among predetermined ratio ranges corresponding to the ratio of the number of active pixels to define a plurality of volume levels, and determine the volume level corresponding to the on-pixel signal to control the volume according to the ratio corresponding to the determined volume level.