Projector Light Source Protection via Color Beam Intensity Monitoring
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Solution Overview
Problem
Projector components can be damaged due to abnormal operation, leading to potential damage expansion if not properly managed.
Innovation Solution
A projection apparatus with a light source module, light source control module, and optical engine module that senses light intensities of color beams and determines whether to turn off the light source based on light intensity proportions and sums to prevent damage, using a light sensing unit and control unit to calculate ratios and sums to decide when to shut off the light source.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the light source continues operating without monitoring, then productivity is maintained, but the projector components are at risk of damage expansion
Solution Approach 1:
The patent implements preliminary monitoring of light intensity parameters before damage occurs. The light sensing unit continuously detects light intensity values and compares them against predetermined thresholds, enabling the system to take protective action (turning off the light source) before component damage can occur, thus resolving the contradiction between maintaining operation and preventing damage
Solution Approach 2:
The patent establishes a feedback control loop where the light sensing unit provides real-time light intensity information to the control unit, which then adjusts the light source operation accordingly. This closed-loop feedback mechanism allows the system to automatically respond to abnormal conditions and protect components while maintaining normal operation, balancing reliability and productivity
2Reliability
If light intensity monitoring is implemented, then projector component protection is improved, but device complexity increases
Solution Approach 1:
The patent introduces a light sensing unit as an intermediary component that bridges the light source and the control system. This intermediary converts optical parameters (light intensity) into electrical signals that can be processed by the control unit, simplifying the overall control architecture while enabling comprehensive monitoring and protection functionality
Solution Approach 2:
The patent replaces complex mechanical monitoring systems with optical sensing and electronic control. By using a light sensing unit to detect light intensity and a control unit to process the information, the system achieves component protection through non-mechanical means, reducing mechanical complexity while improving reliability
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
Effectively prevents damage expansion by determining when to turn off the light source, thereby protecting the projector components and improving usage safety.
Implementation Method 1
The light sensing unit senses light intensities of the color beams
Implementation Method 2
The fluorescent wheel receives and converts the excitation beam, and the filter color wheel receives and converts the excitation beam converted by the fluorescent wheel into the color beams
Data Source
AI summary
A projection apparatus and a method for protecting the projection apparatus are provided. The projection apparatus includes a light source module, a light source control module, and an optical engine module. The light source module includes a light source and light conversion unit. The light source emits an illumination beam, and the light conversion unit converts the illumination beam into a plurality of color beams with different colors. The light source control module includes a light sensing unit and a control unit. The light sensing unit senses light intensities of the color beams, and the control unit determines whether to turn off the light source according to at least one of a light intensity proportion of the color beams and a sum of the light intensities of the color beams. The optical engine module receives the color beams to generate an image beam.