Display Power Voltage DAC Control for Real-Time Image Load
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Solution Overview
Problem
Display devices face challenges in reducing power consumption while effectively varying power voltage in response to image content, particularly in emissive display panels like organic light-emitting display panels, which require precise voltage control for efficient operation and reduced energy usage.
Innovation Solution
A display device with a control circuit board that includes a controller for real-time analysis of images to determine digital power voltage, a digital-analog converter to generate analog power voltage, and a voltage converter to output variable power voltage based on gray scale, optimizing power usage and reducing consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If power voltage is varied in real time based on image content, then power consumption is reduced, but device complexity increases due to additional control circuits
Solution Approach 1:
The voltage generator is integrated into the control circuit board, merging the voltage generation function with the control logic. This integration reduces the need for separate power management components and simplifies the overall system architecture while enabling real-time voltage adjustment based on image content analysis
Solution Approach 2:
The system dynamically adjusts the power voltage in real time based on the analyzed image content. The controller continuously monitors image characteristics and modifies the digital power voltage accordingly, which is then converted to analog voltage by the DAC. This dynamic adaptation allows optimal power consumption for varying display requirements without manual intervention
2Measurement precision
If digital-analog converter is added to convert digital power voltage to analog, then power voltage control precision is improved, but manufacturing cost increases
Solution Approach 1:
The digital-analog converter is designed to serve multiple functions within the power management system. It not only converts the digital power voltage to analog for precise control but also works in conjunction with the voltage generator to provide stable output voltages for different display panel requirements, maximizing the utility of this additional component
Solution Approach 2:
The system changes the voltage parameter dynamically based on image content analysis. The controller adjusts the digital power voltage level according to the brightness and complexity of the displayed image, and the DAC converts these adjusted digital values to precise analog voltages, enabling fine-grained control of power delivery to match actual display needs
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution allows for real-time adjustment of power voltage in display devices, enhancing efficiency and reducing power consumption by aligning voltage levels with image content, thereby improving overall energy management and performance.
Implementation Method 1
The voltage generator includes a digital-analog converter which converts the digital-type power voltage into the analog-type power voltage and outputs the analog-type power voltage
Data Source
AI summary
A display device includes a display panel which displays an image, and a control circuit board connected to the display panel. The control circuit board includes a controller which analyzes the image in real time and determines in real time a digital-type power voltage based on the image, and a voltage generator which generates an analog-type power voltage based on the digital-type power voltage received from the controller. The voltage generator includes a digital-analog converter which converts the digital-type power voltage into the analog-type power voltage and outputs the analog-type power voltage.