Projector Light Intensity Control for Brightness and White Balance
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Solution Overview
Problem
Projectors face challenges in utilizing available capacity in light source devices to maintain white balance and increase brightness without increasing component costs or altering physical configurations.
Innovation Solution
A method for a projector that includes light providers for different colors, generators to produce output lights, and a projection optical system, where the light intensity and transmittance of each color are controlled based on image information to adjust brightness while maintaining white balance, utilizing available capacity in light sources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the output of yellow light or blue light is decreased to adjust white balance, then white balance is maintained, but available capacity is wasted and brightness cannot be maximized
Solution Approach 1:
The patent applies dynamics by making the light intensity control adaptive and variable based on image content. The control unit dynamically adjusts the light intensity of individual color components (red, green, blue, yellow) according to the amplification information calculated from image brightness and color distribution, allowing the system to transition from static fixed intensity to dynamic adaptive intensity control that maximizes brightness while maintaining white balance
Solution Approach 2:
The patent changes the parameter of light intensity from fixed to variable based on image characteristics. By calculating amplification information from image brightness and color distribution, the system determines optimal light intensity values for each light source component, transforming the system from operating at constant parameters to operating at optimized variable parameters that exploit available capacity
2Illumination intensity
If additional light sources or high-cost optical components are used to increase brightness, then brightness is improved, but device complexity and cost increase
Solution Approach 1:
The patent applies self-service by enabling the existing light source devices to serve themselves more effectively through intelligent control. The control unit analyzes image characteristics and automatically adjusts light intensity distribution among existing components (blue light source, yellow light source with red and green filters), allowing the system to maximize brightness output from existing hardware without requiring additional light sources or optical components
Solution Approach 2:
The patent makes existing light source components multi-functional by enabling each light source (blue and yellow) to contribute flexibly to multiple color channels. The yellow light source can provide both red and green components through filter switching, and the control unit optimizes the contribution of each component based on image requirements, allowing existing components to perform multiple functions and maximize brightness without adding hardware
Data Source
AI summary
A method of an operation of a projector, projector including first, second, and third light provider configured to output a first, second, and third light having first color, first generator configured to generate first output light from first light, second generator configured to generate second output light from second light, third generator configured to generate third output light from third light, and projection optical system configured to project projection image using first, second, and third output light, method includes, based on image information representing first image, amplification information representing degree of amplification of brightness of first image, and controlling, based on amplification information, proportion of light intensity of second output light to light intensity of second light received by second generator, and proportion of light intensity of third output light to light intensity of third light received by third generator.