Image Generation Apparatus for Projector Lamp Deterioration Assessment
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Solution Overview
Problem
Existing image generation systems fail to accurately assess the brightness of images displayed on projectors, leading to inconsistencies in perceived brightness due to lamp deterioration, which affects the reliability of evaluating projector performance.
Innovation Solution
An image generation apparatus that determines and outputs image data for evaluation images with specific reference and evaluation colors in a predetermined color space, allowing for the retention of image data when the brightness of the first evaluation color matches the second evaluation color, enabling the estimation of lamp deterioration and tone correction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If existing image generation systems are used to assess projector brightness, then the system is simple to operate, but the measurement precision is insufficient leading to inaccurate brightness assessment
Solution Approach 1:
The evaluation image is segmented into multiple regions with different reference colors (first reference color and second reference color). Each region contains evaluation colors at different brightness levels, allowing separate assessment of brightness perception for different color regions. This segmentation enables precise brightness measurement by comparing how different colors appear under the same lighting conditions.
Solution Approach 2:
The patent utilizes color space relationships (such as CIE Lab color space) to generate evaluation colors with specific chromaticity coordinates. By using colors with different a* and b* values but controlled L* (brightness) values, the system can assess perceived brightness while accounting for color perception characteristics. The color changes principle allows the system to evaluate brightness perception across different color regions, improving measurement accuracy.
2Reliability
If lamp deterioration is not monitored, then the device complexity is low, but the reliability of projector performance evaluation deteriorates
Solution Approach 1:
The system performs preliminary brightness assessment by displaying evaluation images with known color characteristics before actual projector usage. By establishing baseline brightness perception data using reference colors and evaluation colors, the system creates a reference state for future comparisons. This preliminary action enables detection of lamp deterioration by comparing current brightness perception against the established baseline.
Solution Approach 2:
The system implements feedback by comparing the perceived brightness of evaluation colors against reference brightness values. When lamp deterioration occurs, the brightness perception changes, and this feedback is used to detect and quantify the deterioration. The retaining unit stores reference image data, and by comparing current display characteristics with stored references, the system provides continuous feedback on projector performance and lamp condition.
Data Source
AI summary
An image generation apparatus includes an image-data generation unit, an image-data output unit, and a retaining unit. The image-data generation unit generates image data of an evaluation image having a first reference color, a second reference color, a first evaluation color, and a second evaluation color, the first and second reference colors being paired in a predetermined color space, the first and second evaluation colors being different colors between the first and second reference colors in the predetermined color space. The image-data output unit outputs the image data to a display device. The retaining unit retains image data of the first and second evaluation colors obtained when an image having the first evaluation color looks the same as an image having the second evaluation color in terms of brightness or tint in a case where the evaluation image is displayed on the display device.