Projector Lens Driver Power Segmentation for Quick Attachment
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Solution Overview
Problem
Projectors face challenges in quickly changing lenses in power supply modes designed to lower power consumption, as lens movement is restricted, and restarting the projector is often necessary to detach the lens.
Innovation Solution
A projector configuration with multiple power supply modes, including a second mode where power is terminated to the light source but supplied to the lens driver, allowing the lens to be moved to an attachment/detachment position, enabling quick lens changes without restarting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by stationary object
If the projector transitions to a power supply mode that lowers power consumption, then power consumption is reduced, but the projection lens cannot be moved to the attachment/detachment position
Solution Approach 1:
The power supply control is segmented into different modes: a first power supply mode that supplies power to both the light source and lens driver, and a second power supply mode that supplies power only to the lens driver. This segmentation allows the lens to be movable in the low-power mode while the light source remains powered down, resolving the contradiction between power consumption and lens operation capability
Solution Approach 2:
The power supply mode is dynamically switched based on operational requirements. When lens attachment or detachment is needed, the system transitions to the second power supply mode that enables lens movement while maintaining low overall power consumption. This dynamic adjustment resolves the contradiction by making the system adaptable to different operational states
2Ease of operation
If the projector is restarted to detach the projection lens in low-power mode, then the lens can be detached, but time is lost due to the restart process
Solution Approach 1:
The system performs preliminary action by pre-positioning the projection lens at the attachment/detachment position during the first power supply mode before transitioning to the second power supply mode. This preliminary positioning eliminates the need for restart, allowing immediate lens detachment when needed while in low-power mode, thus resolving the time loss contradiction
3Ease of operation
If power is supplied to the lens driver in the second power supply mode, then the projection lens can be moved to the attachment/detachment position, but power consumption increases compared to complete power termination
Solution Approach 1:
The system applies partial action by supplying power only to the lens driver in the second power supply mode while terminating power to the light source. This partial power supply is sufficient to enable lens movement and attachment/detachment operations, while avoiding the excessive power consumption of supplying power to all components, thus resolving the contradiction between operational capability and power consumption
Data Source
AI summary
A projector including a light source, a power supply section, a power supply control section that controls power supply from the power supply section, a projection lens that projects an image, and a projection system driver that moves the projection lens, wherein the power supply control section performs, as power supply modes, an operation mode in which power is supplied to the light source section to allow the light source section to output light and a first standby mode in which the power supply to the light source section is terminated, and in the first standby mode, power is supplied to the projection system driver to allow the projection lens to move to an attachment/detachment position where the projection lens is attachable and detachable.