Projector Light Control Adaptation to Power Supply Voltage
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Solution Overview
Problem
Projectors lack the ability to effectively control light output when the power supply voltage differs from the intended voltage, leading to restricted functionality and potential user confusion regarding available settings.
Innovation Solution
A projector configuration that includes a light source section, a light modulation section, and a control section to manage light output based on the power supply voltage, allowing for different light states and menu screen interactions depending on whether the projector is connected to a 200-V or 100-V power supply, ensuring functionality aligns with available power and notifying users of limitations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the projector is connected to a 100-V power supply (lower voltage), then the projector can operate with reduced power consumption, but the function of controlling the amount of outputted light cannot be executed
Solution Approach 1:
The control section dynamically changes the operational state of the light control function based on the detected power supply voltage. When 200-V power supply is detected, the light control function is enabled; when 100-V power supply is detected, the function is restricted. This dynamic adaptation allows the projector to optimize power consumption while maintaining functionality where appropriate.
2Use of energy by moving object
If the projector restricts the light control function when connected to 100-V power supply, then power consumption is reduced, but user confusion may occur regarding available settings
Solution Approach 1:
The control section provides visual feedback by projecting a displayed content on the projection surface that indicates the light control function is not available when connected to 100-V power supply. This feedback mechanism informs users of the current functional limitations, preventing confusion about why certain settings are unavailable.
Solution Approach 2:
The projector performs preliminary detection of the power supply voltage before allowing operation of the light control function. By detecting the voltage level in advance and proactively restricting the function accordingly, the system prevents attempts to use unavailable features, thereby avoiding user confusion.
3Adaptability or versatility
If the projector allows light control function execution on 100-V power supply, then adaptability is improved, but power consumption increases and may cause operational issues
Solution Approach 1:
The control section changes the operational parameter of the light control function based on the power supply voltage parameter. When 200-V voltage is detected, the function operates normally; when 100-V voltage is detected, the function parameter is changed to a restricted state, preventing execution that would cause power consumption issues.
4Ease of operation
If the projector provides menu screen for light control settings, then user control capability is improved, but operational complexity increases when power supply voltage varies
Solution Approach 1:
The control section performs preliminary detection of power supply voltage and proactively disables the light control function before the user can attempt to access it. By showing displayed content indicating unavailability, the system prevents users from navigating to complex settings that would not work, thereby reducing operational complexity.
Solution Approach 2:
When 100-V power supply is detected, the control section extracts or removes the light control function from the available operational menu. By taking out this function from the set of available controls, the system simplifies the user interface and reduces operational complexity while maintaining ease of operation for the remaining available functions.
Data Source
AI summary
A projector includes a light source section that outputs first light, a power supply section that generates electric power in both a case where the power supply section is connected to a commercial AC power supply having first power supply voltage and a case where the power supply section is connected to a commercial AC power supply having second power supply voltage lower than the first power supply voltage, a light source drive section that controls the amount of first light, and a control section that allows execution of a function of controlling the amount of first light in the case where the power supply section is connected to the commercial AC power supply having first power supply voltage and restricts the execution of the function in the case where the power supply section is connected to the commercial AC power supply having second power supply voltage.