Projector Luminance Control for Voltage Stability
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Micro projectors connected to electronic devices can cause unstable internal voltage, leading to abnormal running or auto shutdown, potentially damaging device components due to low power voltage.
Innovation Solution
A projector with a detection unit, projection unit, light source module, and control unit that adjusts the luminance of the projection light starting from low luminance, detecting and responding to threshold voltage and power levels to minimize voltage influence and prevent shutdown.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the projector uses the voltage provided by the electronic device, then the projector can operate without an independent power source, but the internal voltage of the electronic device becomes unstable causing abnormal running or auto shutdown
Solution Approach 1:
The control unit continuously detects the voltage provided by the electronic device and adjusts the luminance of the light source module in real-time based on the detected voltage level, creating a feedback loop that maintains system stability
Solution Approach 2:
The system dynamically adjusts the luminance of the light source module based on detected voltage conditions, transitioning between different luminance states (first luminance, second luminance, third luminance) to adapt to varying voltage levels from the electronic device
2Productivity
If the voltage power from the electronic device is relatively low, then the projector can still operate, but the electronic device may experience abnormal running or auto shutdown that could damage its components
Solution Approach 1:
The control unit detects voltage conditions in advance and proactively adjusts the luminance before voltage instability causes damage, preventing abnormal running or auto shutdown by anticipating potential problems
Solution Approach 2:
The system changes the luminance parameter of the light source module based on detected voltage levels, adjusting this key parameter to maintain operation while protecting against voltage-related damage
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 effectively reduces the impact on the electronic device's internal voltage, preventing abnormal running or shutdown and protecting components by adjusting the projector's power consumption based on detected voltage and power levels.
Implementation Method 1
a light source of the micro projector adopts a light emitting diode (LED) or another solid-state light source
Data Source
AI summary
A projector and a light source controlling method thereof are provided. The light source controlling method includes the following steps. The light source module is controlled to adjust a luminance of a projection light generated by a light source module starting from a low luminance. A power source voltage from an electronic device is detected to be equal to a threshold voltage or not. A power of the power source voltage is detected to be equal to a threshold power or not. When the power source voltage is equal to the threshold voltage and the power of the power source voltage is less than or equal to the threshold power, or when the power source voltage is greater than or equal to the threshold voltage and the power of the power source voltage is equal to the threshold power, the adjustment of the luminance of the projection light is stopped.