Projector Power Supply Cooling via Insulated Data Transmission
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Solution Overview
Problem
Existing projector cooling control methods require additional paths and components, complicating configuration and increasing costs, while wireless methods are prone to noise interference, affecting temperature data accuracy.
Innovation Solution
A projector with a power-supply unit, a first control unit, and a second control unit, where temperature information is generated and transmitted via an insulation transmitting section for accurate cooling control, allowing minimal additional components and reducing noise susceptibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a new wired path or new member is added to transmit temperature information, then temperature data transmission is enabled, but device complexity increases and cooling efficiency may be reduced due to blocked wind paths
Solution Approach 1:
The power supply route is designed to serve dual purposes: both power transmission and temperature information transmission. The insulation transmitting section enables the same physical path to carry both electrical power and temperature data signals, eliminating the need for separate dedicated communication paths.
Solution Approach 2:
The power supply unit itself performs temperature measurement and data transmission functions through its existing infrastructure. The temperature detecting section within the power supply unit utilizes the power supply route's insulation properties to transmit temperature information, making the power supply system self-sufficient for both power and thermal management.
2Device complexity
If wireless infrared radiation is used to transmit temperature data, then no new physical path is needed, but noise interference reduces measurement accuracy
Solution Approach 1:
The insulation transmitting section acts as an intermediary that enables direct electrical signal transmission through the insulated power supply route. This intermediary mechanism allows temperature data to be transmitted through the existing power cables without exposing the system to wireless noise interference, while maintaining configuration simplicity.
3Measurement precision
If temperature detection is performed inside the power supply unit, then accurate cooling control is achieved, but additional components increase production costs
Solution Approach 1:
The temperature detection function is merged with the power supply unit's existing structure and components. The temperature detecting section is integrated into the power supply circuitry, and the same insulation transmitting section used for power transmission also carries temperature data, eliminating the need for separate detection components and reducing production costs.
Data Source
AI summary
A projector according to an embodiment of the invention can measure the temperature of an object to be cooled accurately with a simple configuration and perform accurate cooling control. The projector includes a power-supply unit, a ballast unit having a ballast control circuit and a photocoupler, and a control unit. The power-supply unit includes a temperature detection element generating temperature information indicating the temperature inside the power-supply unit. The ballast control circuit controls a constant-current control circuit and the like based on the control information transmitted from the control unit via the photocoupler and transmits temperature data based on the temperature information to the control unit via the photocoupler. The control unit includes a projector control circuit performing cooling control on the power-supply unit based on the temperature data.