Projector Automatic White Balance on Colored Screens
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Solution Overview
Problem
Projectors lack the ability to automatically adjust for different screen colors and ambient light conditions, leading to image distortion and limited flexibility in projection environments.
Innovation Solution
A method involving a sensing module to obtain images, process them to calculate RGB gain coefficients, and adjust the projector's color gains to achieve automatic white balance, allowing for projection on various colored screens and in different ambient light conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional projection methods are used without sensing modules, then the projector structure remains simple, but the projector cannot adapt to different screen colors and ambient light conditions, causing image distortion
Solution Approach 1:
The patent implements a feedback mechanism where sensing modules (color sensors, ambient light sensors) continuously detect screen color and ambient light conditions, transmit this information to a control unit, which then automatically adjusts projection parameters including RGB gain coefficients and white balance settings. This closed-loop feedback system enables real-time adaptation to varying projection environments without manual intervention.
Solution Approach 2:
The projector system performs self-adjustment of projection parameters through integrated sensing modules and control algorithms. The system automatically detects screen color characteristics and ambient light conditions, then autonomously modifies RGB gains and white balance settings without requiring external calibration tools or manual user adjustment, making the system self-sufficient in adapting to different environments.
2Ease of operation
If manual adjustment methods are used for white balance, then the device complexity remains low, but the operation becomes tedious and time-consuming
Solution Approach 1:
The system uses sensing modules to continuously monitor screen color and ambient light conditions, providing real-time feedback to the control unit which automatically adjusts white balance parameters. This eliminates the need for manual iteration and trial-and-error adjustment, reducing both operational complexity and time requirements.
Solution Approach 2:
The patent replaces manual mechanical adjustment mechanisms with automated electronic sensing and control systems. Color sensors and ambient light sensors substitute for manual visual assessment, while electronic control of RGB gains replaces manual convergence adjustment, significantly reducing both time and operational complexity.
3Manufacturing precision
If projection is performed on colored screens without compensation, then no additional processing is needed, but image quality deteriorates due to color distortion
Solution Approach 1:
Color sensing modules detect the actual screen color characteristics and provide feedback to the control unit, which then calculates appropriate RGB gain coefficients to compensate for screen color. This feedback-driven color correction system maintains accurate color reproduction on colored screens by dynamically adjusting projection parameters based on real-time sensor data.
Solution Approach 2:
The system maintains image quality on colored screens by dynamically changing projection parameters, specifically RGB gain coefficients and white balance settings. The control unit adjusts these parameters based on sensor feedback about screen color characteristics, enabling consistent color accuracy across different screen types without requiring physical modifications to the projection system.
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
Enables flexible projection on screens of various colors and reduces the impact of ambient light, improving image quality and adaptability.
Implementation Method 1
enabling a sensing module, and obtaining an output image or a current environment image
Data Source
AI summary
The present invention provides a method for controlling a projector and a projector applicable to the method. The method for controlling a projector comprises steps: enabling a projector, and projecting on a screen; enabling a sensing module, and obtaining an output image or a current environment image; processing the output image or the current environment image to obtain an RGB component, and calculating the gain coefficients of three channels RGB according to an automatic white balance algorithm; and adjusting the gains of the three channels RGB in the projector according to the gain coefficients. Using the method and the projector enables a projection screen not to be limited by colors, that is, screens with various colors can be chosen at ease, and the imaging effect of projection is not influenced.