Display Driving Voltage Adjustment for Power Quality Trade-off
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Solution Overview
Problem
Display devices face challenges in reducing power consumption while maintaining image quality, as existing technologies often compromise on either factor.
Innovation Solution
A display device with a controller and voltage generator system that adjusts driving voltage levels based on grayscale differences between image frames, using a correction signal to generate image data and drive the display panel efficiently, thereby optimizing power usage without degrading image quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the driving voltage is increased to maintain image quality, then the display quality is improved, but the power consumption increases
Solution Approach 1:
The patent applies dynamics by making the driving voltage adjustable rather than fixed. The voltage generator dynamically changes the driving voltage level based on the grayscale value of the image signal, allowing the system to optimize between power consumption and display quality in real-time. This resolves the contradiction by enabling the system to use lower voltage (reducing power consumption) when high quality is not required, while switching to higher voltage when quality must be maintained.
Solution Approach 2:
The patent changes the parameter of driving voltage level according to the grayscale value of the image signal. By varying the voltage parameter dynamically, the system can achieve different display quality levels while managing power consumption. This parameter change approach allows the same display hardware to operate efficiently across different quality requirements without compromising either aspect simultaneously.
2Use of energy by moving object
If the driving voltage is adjusted frequently to optimize power consumption, then the power consumption is reduced, but the display quality may be deteriorated
Solution Approach 1:
The patent implements feedback by using the grayscale value of the image signal as input to determine the driving voltage level. The controller continuously monitors the image signal characteristics and adjusts the voltage accordingly, creating a closed-loop system that ensures display quality is maintained while optimizing power consumption. This feedback mechanism prevents quality deterioration by ensuring voltage adjustments are based on actual image requirements.
3Device complexity
If a fixed driving voltage is used to simplify the voltage generation system, then the device complexity is reduced, but the power consumption cannot be optimized
Solution Approach 1:
The patent introduces dynamics to the voltage generation system, transforming it from a fixed voltage source to a dynamic voltage generator that adjusts based on image signal characteristics. This adds controlled complexity to the voltage generation component, enabling power optimization while maintaining reasonable system complexity through a straightforward voltage-adjustment mechanism.
Data Source
AI summary
A display device includes a controller, a panel driver, and a voltage generator. The controller generates a first control signal and generates image data and a second control signal in response to first and second image signals. The panel driver generates a driving signal in response to the image data and the first control signal to drive a display panel. The voltage generator generates a driving voltage to drive the display panel and changes a voltage level of the driving voltage in response to the second control signal. The first image signal corresponds to a second frame located before a third frame in which the driving voltage is changed. The second image signal corresponds to a first frame located before the second frame. The controller generates image data corresponding to the second frame in response to the first image signal and the second image signal.