Dual Light Source Units for Portable Projection Power Management
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Solution Overview
Problem
Portable projection systems face limitations in power consumption and brightness due to reliance on battery power, leading to reduced operational time.
Innovation Solution
A projection system with two light source units, one optimized for external power (adapter mode) and another for battery power (battery mode), allowing for efficient power management and brightness adjustment based on the power source, featuring distinct light emitting devices with varying chip sizes, brightness, and power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single light source unit is used in portable projection systems, then the device structure is simple, but the power consumption and brightness cannot be adequately adjusted for different power sources
Solution Approach 1:
The light source system is divided into two separate light source units: a first light source unit with higher brightness and power consumption optimized for external power supply, and a second light source unit with lower power consumption optimized for battery operation. This segmentation allows the system to adapt to different power sources by selecting the appropriate light source unit, resolving the contradiction between adaptability and structural simplicity.
2Illumination intensity
If a light source optimized for external power is used, then brightness is sufficient, but power consumption is too high for battery operation
Solution Approach 1:
The patent segments the light source into two units with different power consumption characteristics. The first light source unit provides high brightness for external power mode, while the second light source unit provides lower but sufficient brightness for battery mode with reduced power consumption. This allows the system to match brightness requirements with available power sources.
Solution Approach 2:
Each light source unit is designed with local quality optimized for its specific operating condition. The first light source unit has higher luminous output characteristics for external power, while the second light source unit has lower power consumption characteristics for battery operation. This local optimization resolves the contradiction between brightness and power consumption.
3Use of energy by moving object
If a light source optimized for battery power is used, then power consumption is reduced, but brightness becomes insufficient for external power operation
Solution Approach 1:
The patent creates two segmented light source units where the second unit is optimized for battery operation with lower power consumption, while the first unit is optimized for external power operation with higher brightness. The system can switch between units based on power source availability, ensuring adequate brightness when external power is available while maintaining low power consumption when using battery.
4Duration of action of moving object
If only battery power is available, then portability is maintained, but operational time is limited due to insufficient power management
Solution Approach 1:
The patent segments the light source system to include a second light source unit specifically optimized for battery operation with minimal power consumption. This segmentation extends operational time when using battery power, as the system can switch to the low-power light source unit when external power is not available, directly addressing the limitation of operational duration.
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 system achieves adequate power consumption and brightness with extended operational time, even when powered solely by a battery, by selectively using light source units tailored for each power mode.
Implementation Method 1
a light transmitting unit transmitting light emitted from the first light source unit or the second light source unit in the form of surface light
Data Source
AI summary
A projection system is characterized by: a first light source unit and a second light source unit selectively driven in response to operation mode; a light transmitting unit transmitting light emitted from the first light source unit or the second light source unit in the form of surface light; an image generator generating an image in response to an image signal using the light transmitted from the light transmitting unit; and a projection lens system projecting the image by enlarging the image generated by the image generator and projecting the enlarged image.