Video Contrast Simulation for Projector Selection
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Solution Overview
Problem
Existing systems fail to predict how video from video instruments, such as projectors and direct-view displays, appears in different viewing environments, particularly due to varying environmental light conditions, making it difficult to select appropriate equipment for specific use cases.
Innovation Solution
A method and device that simulate how output video appears under a given viewing environment by inputting environmental illuminance and video instrument settings, calculating and outputting video contrast based on the ratio between the video's illuminance and environmental illuminance at the formation plane.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If video is projected in a bright viewing environment, then the projected video becomes visible to viewers, but the video appears whitish and loses contrast making it difficult to see clearly
Solution Approach 1:
The patent adjusts video display parameters (brightness, contrast, color temperature) based on measured environmental illuminance conditions. The control unit dynamically changes these parameters to maintain optimal video quality across different lighting environments, preventing the whitish appearance problem in bright conditions.
2Illumination intensity
If the light quantity of projected video is increased to overcome bright environment, then video visibility improves, but energy consumption increases
Solution Approach 1:
The patent employs a feedback mechanism where the illuminance sensor continuously monitors environmental light conditions and feeds this information to the control unit. The control unit then adjusts video brightness and other parameters accordingly, ensuring energy-efficient operation by only increasing brightness when necessary rather than operating at maximum power continuously.
Solution Approach 2:
The system dynamically changes display parameters based on environmental conditions. Instead of maintaining constant high brightness, the system adjusts brightness levels to match ambient lighting conditions, reducing energy consumption in dim environments while maintaining visibility in bright conditions.
3Measurement precision
If video instruments are tested in actual use places to determine quality, then accurate assessment is achieved, but transportation and installation costs increase
Solution Approach 1:
The patent introduces an illuminance sensor and control unit as intermediaries between the video instrument and the viewing environment. These components enable the system to measure and adapt to environmental conditions without requiring physical relocation of the entire video instrument for testing or deployment.
Solution Approach 2:
The system creates a simulated representation of the actual viewing environment by measuring environmental illuminance and using this data to adjust video display parameters. This allows quality assessment and optimization to be performed remotely without physically transporting equipment to the final installation location.
4Adaptability or versatility
If environmental illuminance varies in different viewing environments, then video appearance changes, but prediction of video appearance becomes difficult
Solution Approach 1:
The patent performs preliminary measurement of environmental illuminance conditions before video display. The control unit uses this advance information to pre-adjust video parameters, ensuring that the video appearance is optimized for the specific environment before actual viewing begins, making the outcome predictable rather than random.
Solution Approach 2:
The system continuously monitors environmental illuminance and uses this feedback to maintain consistent video quality across different locations. By measuring and responding to environmental conditions, the system ensures predictable video appearance regardless of where the video instrument is deployed.
Data Source
AI summary
A method of simulating how output video from a video instrument that presents video appears under a given viewing environment includes: inputting an environmental illuminance in a viewing environment in which output video is viewed; inputting a set condition with regard to the video instrument, the set condition including at least optical output; and calculating and outputting, by using the environmental illuminance and the set condition, a video contrast based on a ratio between an illuminance of the output video and the environmental illuminance at a video formation plane on which the output video is formed.