Dynamic Resolution Projection Display Modulation Frequency
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Solution Overview
Problem
Wearable devices face challenges in reducing power consumption while maintaining optimal image quality, as each additional pixel in the graphics pipeline increases energy load.
Innovation Solution
The effective resolution of a projection display system is dynamically modified based on the type of content being displayed by selecting appropriate modulation frequencies for light emitters, reducing the number of pixels and corresponding power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the number of pixels is increased to improve image quality, then perceived image quality is improved, but power consumption increases
Solution Approach 1:
The system dynamically adjusts the emitter modulation frequency based on content type classification. For complex graphical content, a higher modulation frequency is used to maintain perceived image quality, while for simple text content, a lower modulation frequency reduces power consumption. This dynamic adaptation resolves the contradiction by making pixel processing intensity variable rather than fixed.
Solution Approach 2:
The system changes the emitter modulation frequency parameter according to the identified content type. By modifying this key parameter, the system can process fewer pixels for simple content types while maintaining adequate quality, and process more pixels for complex content types where quality is prioritized, thus balancing power consumption and image quality.
2Measurement precision
If the emitter modulation frequency is increased to improve image quality, then perceived image quality is improved, but power consumption increases
Solution Approach 1:
The system dynamically selects modulation frequency based on content type rather than using a fixed high frequency. This dynamic approach allows the stationary light emitter to operate at lower power consumption levels for simple content while maintaining high frequency only when necessary for complex graphical content, resolving the energy quality contradiction.
Solution Approach 2:
The emitter modulation frequency parameter is changed according to content complexity classification. By adjusting this parameter based on content type, the system achieves optimal perceived image quality for each content category while minimizing unnecessary power consumption associated with consistently high modulation frequencies.
3Use of energy by moving object
If the display resolution is reduced to decrease power consumption, then power consumption is reduced, but user cognitive load increases
Solution Approach 1:
The system applies different modulation frequencies to different content types locally. Text content receives lower modulation frequency (reduced processing) while graphical content receives higher modulation frequency (maintained processing quality). This local differentiation reduces overall power consumption while maintaining adequate quality where it matters most, thus reducing user cognitive load selectively.
Solution Approach 2:
The system changes the effective resolution parameter dynamically based on content type identification. For text content, lower resolution is acceptable and applied, reducing cognitive load. For graphical content, higher resolution is maintained to preserve visual quality and minimize cognitive effort required to interpret the display.
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 while maintaining low user cognitive load and high perceived image quality by dynamically adjusting the display resolution according to the content type.
Implementation Method 1
selecting, based at least in part on the identified type of content, a first emitter modulation frequency; and rendering pixels of the first portion of content at a first effective resolution by modulating one or more light beams directed to a first display area of a projection surface at the first emitter modulation frequency
Data Source
AI summary
Systems, devices, and techniques are provided for reducing graphical bandwidth in a projection display system by modifying a modulation frequency used to display one or more portions of content based on an identified content type of such portions. Content is received for display, and types of content associated with one or more portions of the received content are identified. For each respective portion of content, an effective resolution is selected for displaying the respective portion based on the identified content type for the respective portion, and one or more light beams directed to a respective display area of a projection surface are modulated at a respective emitter modulation frequency that corresponds to the selected effective resolution for the respective portion.