Photo-Switchable Screen Control for Low-Power Continuous Display
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Solution Overview
Problem
Current display devices in projection systems face challenges in achieving better user experience with lower power consumption, particularly in applications like heads-up displays where continuous image generation is required without constant high brightness, leading to increased power usage.
Innovation Solution
A control method is implemented in display devices comprising an image generator and a photo-switchable screen that operates in different light-transmittance modes, where the image generator outputs images during light-emitting periods and stops during non-light-emitting periods, reducing power consumption by maintaining high brightness only when necessary and allowing the screen to switch between high and low light-transmittance modes based on control signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the image generator continuously outputs images at high brightness, then the user experience is maintained, but the power consumption increases
Solution Approach 1:
The patent implements periodic action by dividing the display into light-emitting periods and non-light-emitting periods. During light-emitting periods, the image generator outputs images at high brightness; during non-light-emitting periods, it stops outputting. This periodic operation reduces average power consumption while maintaining visible display through the screen's light-transmittance switching capability.
Solution Approach 2:
The patent applies dynamics by making the screen's light-transmittance adjustable between different modes (first operation mode with first light-transmittance and second operation mode with second light-transmittance). This dynamic adjustment allows the system to optimize between brightness and power consumption based on operational requirements.
2Illumination intensity
If the screen operates in high light-transmittance mode continuously, then the image visibility is improved, but the power consumption increases
Solution Approach 1:
The screen switches between first operation mode (first light-transmittance) and second operation mode (second light-transmittance) periodically, synchronized with the light-emitting and non-light-emitting periods. This periodic switching enables the screen to maintain high visibility during light-emitting periods while reducing power consumption during non-light-emitting periods.
Solution Approach 2:
The screen's light-transmittance is made dynamic by allowing switching between different operation modes. This dynamic capability enables the system to adjust light-transmittance based on whether the image generator is actively emitting light, optimizing both visibility and power efficiency.
3Use of energy by moving object
If the image generator stops outputting images during non-light-emitting periods, then the power consumption is reduced, but the continuous display capability is affected
Solution Approach 1:
The system uses periodic action with synchronized light-emitting and non-light-emitting periods. The image generator alternates between outputting and stopping image output, while the screen alternates between high and low light-transmittance modes. This coordination maintains continuous visual display perception while enabling power savings during non-light-emitting periods.
Solution Approach 2:
The patent maintains continuity of useful action through the coordinated operation of the image generator and screen. Even though the image generator stops outputting during non-light-emitting periods, the screen's light-transmittance switching ensures that the display function remains effective and perceptible to users, maintaining continuous useful display action.
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
This approach reduces power consumption by intermittently maintaining high brightness and light-transmittance, enhancing user experience while minimizing energy usage, particularly in applications like vehicle-mounted displays where continuous information is needed without constant high power consumption.
Implementation Method 1
a photo-switchable screen configured to display image information... the photo-switchable screen is directed to operate in a first operation mode or a second operation mode... The photo-switchable screen has a first light-transmittance in the first operation mode and has a second light-transmittance in the second operation mode
Data Source
AI summary
A control method applied in a display device is provided. The display device includes an image generator and a screen. The image generator is directed to output an output image. The screen is directed to operate in a first operation mode or a second operation mode. The screen has a first light-transmittance in the first operation mode and has a second light-transmittance in the second operation mode. The first light-transmittance is different from the second light-transmittance. In response to the screen operating in the first operation mode or the second operation mode, the image generator outputs the output image onto the screen in a light-emitting period and stops outputting the output image onto the screen in a non-light-emitting period after the light-emitting period.