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Safety control device for heat elimination of digital projector

A technology for safety control and projectors, applied in projection devices, lighting devices, cooling/heating devices of lighting devices, etc., can solve problems such as damage to the projector and the inability of axial fans to dissipate heat, and achieve the effect of avoiding damage to the projector

Inactive Publication Date: 2005-01-26
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If, at this time, the user improperly unplugs the power cord after turning off the power, it will inevitably cause the axial flow fan to stop and fail to dissipate heat, thereby causing damage to the projector.
In the process of projectors being used in digital film and television broadcasting, this failure phenomenon is more serious

Method used

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  • Safety control device for heat elimination of digital projector

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Embodiment Construction

[0011] Preferred embodiments of the present invention will be described in further detail below in conjunction with the accompanying drawings, with reference to figure 1 , which shows a block diagram of the electrical principle of the heat dissipation safety control device of the preferred embodiment of the present invention. The heat dissipation safety control device according to the preferred embodiment of the present invention includes two parts: a voltage and temperature detection control part 1 and a power failure safety protection power supply 2 . Wherein, the voltage temperature detection control part 1 includes: a voltage sensor 3 and a voltage detection circuit 4, a temperature sensor 5 and a temperature detection circuit 6, a control circuit 7, a timing circuit 8 and a buzzer 9; the power-off safety protection power supply 2 includes: Control circuit 10, rechargeable battery 11 and protection power control circuit 12. Wherein, the voltage detection circuit 4 and the...

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Abstract

A safety control apparatus for digital projector heat dissipation is used in the field of electron device technique. In this invention, the input end of charge control circuit is connected with direct current source end of projector and its output end is connected with rechargeable battery; the output end of voltage sensor is connected with input end of voltage detecting circuit; the output end of temperature sensor is connected with input end of temperature detecting circuit; the output signals of voltage and temperature detecting circuit are separately connected with the input ends of control circuit; the four output ends of control circuit are separately connected with rechargeable control circuit, electrical source protection control circuit, timing circuit and buzzer, wherein, the output end of timing circuit as another control signal for the control circuit is connected with another input end of control circuit.

Description

technical field [0001] The invention relates to a digital projector, more specifically, to a heat dissipation safety control device of the digital projector. Used in the technical field of electronic equipment. Background technique [0002] With the increasing popularity of digital projectors in the field of multimedia technology, higher and higher requirements are placed on the intensity or brightness of the projector's light source. For some small and medium-sized digital theaters or entertainment venues, the broadcasting requirements and display effects of film and television projection, the light source intensity or brightness distance of digital projectors must be much greater than that used by ordinary projectors. As the intensity or brightness of the light source increases, the heat generated and accumulated in the whole machine is also increasing. Therefore, the heat dissipation and cooling of the projector is a very important issue. [0003] Through literature sea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F21V29/61G03B21/16H04N5/74
Inventor 龙沪强方向忠
Owner SHANGHAI JIAO TONG UNIV
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