Image Projection Device Color Correction Power Management
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Solution Overview
Problem
Current image projection devices that perform color correction do not effectively reduce power consumption, as they primarily attenuate light intensity rather than adjusting the light source's power usage, despite converting primary color mixing amounts into corrected values based on projection surface spectral reflectance.
Innovation Solution
An image projection device that includes light source means emitting colored lights, projection means modulating these lights according to image data, and correction means using projection surface information to determine and apply correction values, thereby adjusting the intensity of the light source to reduce power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the intensity of each of lights R, G and B emitted from a light source is attenuated to reduce light intensity, then the corrected mixing amounts R, G and B can be achieved, but the power consumption of the light source cannot be reduced
Solution Approach 1:
The patent changes the parameter of light source output intensity directly based on the corrected mixing amounts. Instead of attenuating light after emission, the system adjusts the light source intensity parameters before emission, allowing direct control over the actual light output required for color correction while minimizing energy consumption.
2Measurement precision
If color correction is performed using conversion matrix with projection surface spectral reflectance, then accurate color reproduction is achieved, but the light source power cannot be reduced
Solution Approach 1:
The system performs preliminary calculation of corrected mixing amounts using the conversion matrix and projection surface spectral reflectance before the light is emitted. This preliminary action allows the light source intensity to be pre-adjusted to the exact values needed for accurate color reproduction, eliminating unnecessary energy consumption from over-illumination.
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
The solution reduces power consumption by controlling the light source intensity based on color correction needs, achieving efficient power management while maintaining accurate color reproduction.
Implementation Method 1
light source means that emits a plurality of colored lights
Implementation Method 2
projection surface information indicating a spectral reflectance of the projection surface
Data Source
AI summary
An image projection device includes a light source that emits a plurality of colored lights and a projection section that modulates each colored light emitted by the light source according to image data and projects an image onto a projection surface, a storage section that stores projection surface information indicating a spectral reflectance of the projection surface, and a correction section that determines, when the image data is received, a correction value for correcting a color shift in the image on the projection surface using the projection surface information, and corrects an intensity value of a colored light emitted by the light source by controlling the light source according to the correction value.