Laser Projection Brightness via Saturation-Based Power Allocation
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Solution Overview
Problem
Conventional laser projectors face limitations in brightness due to safety standards for laser products, restricting laser power and thus the overall brightness of projected images.
Innovation Solution
An image processing apparatus that determines emphasis coefficients based on image saturation to enhance luminance signals, allowing for increased laser power within safety limits by adjusting laser output for each pixel and area of the projected image, thereby improving image brightness while adhering to safety standards.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If laser power is increased to improve brightness, then brightness of projected image is improved, but safety standard for laser products is violated
Solution Approach 1:
The patent applies local quality by differentiating laser power allocation across different regions of the projection screen. Highly saturated regions receive higher laser power to enhance brightness, while non-saturated regions receive lower power to maintain safety compliance. This spatial variation in power distribution resolves the contradiction between overall brightness improvement and safety standard adherence.
Solution Approach 2:
The patent dynamically changes the laser power parameter based on the saturation level of different image regions. By adjusting the power parameter adaptively - increasing it for saturated regions and maintaining lower levels for non-saturated regions - the system achieves both improved brightness where needed and continued compliance with safety standards overall.
2Object-affected harmful factors
If laser power is restricted to meet safety standards, then safety standard is satisfied, but brightness of projected image is reduced
Solution Approach 1:
Instead of uniformly restricting laser power across the entire projection, the patent applies local quality by allowing higher power in specific highly saturated regions while maintaining lower power in other areas. This selective approach satisfies overall safety standards while preserving brightness in critical regions where color saturation demands higher intensity.
Solution Approach 2:
The patent employs partial action by applying excessive laser power only to the extent necessary for highly saturated regions, rather than uniformly across the entire image. This partial excessive action in specific areas achieves the desired brightness improvement without causing the system to violate safety standards when viewed as a whole.
Data Source
AI summary
The present technology relates to an image processing apparatus, an image processing method, and a projection apparatus that can improve brightness of a projected image while satisfying a safety standard for laser products. A saturation emphasis processing unit determines, in accordance with saturation of an image, a first emphasis coefficient that emphasizes luminance of the image, and converts a luminance signal of the image on the basis of the determined first emphasis coefficient. The present technology can be applied to, for example, a laser beam scanning type projection apparatus or the like that performs scanning with a laser beam as a light source.