Projector and projector heat radiation fan running status control method

A technology of a cooling fan and a control method, applied in the field of projectors, can solve problems such as affecting the life of the machine, energy waste, etc., and achieve the effect of ensuring the life of the machine and optimizing the running time.

Inactive Publication Date: 2008-10-15
HISENSE VISUAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The shutdown time is generally fixed and will not change due to the temperature inside the machine, so sometimes the temperature inside the machine is still high, but the heat dissipation stops due to the heat dissipation time until the cooling fan stops running, which affects the life of the machine; sometimes the machine is turned on for a short time Shut down, there is no need to cool down for a long time. In this case, the cooling fan will still work delayed, which will easily cause energy waste

Method used

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  • Projector and projector heat radiation fan running status control method

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Effect test

Embodiment 1

[0039] Embodiment 1, with reference to the figure, is a DLP projector, and the key components of the machine chassis include a DMD, a light source and a circuit board. Each of the above key components can be provided with a temperature detection chip (temperature detector), each temperature detection chip corresponds to a cooling fan configured on the component, such as setting a cooling fan connected to the corresponding FAN1_DRIVE, FAN2_DRIVE and FAN3_DRIVE pins, Each temperature detection chip controls the corresponding cooling fan through the main chip (central controller), and writes the lowest temperature in the main chip in advance through software. If it is set for one of the key components, MCP9800 is the temperature detection chip, and DDP3020 is the main chip. Connect the FAN1_DRIVE pin of DDP3020 to the cooling fan corresponding to the component, and control the operation of the cooling fan and / or the PWM pulse. Stop, DDP3020 reads out the current temperature infor...

Embodiment 2

[0040] Embodiment 2, a method for controlling the operation state of the above-mentioned projector cooling fan, detects the current temperature of the key components in the chassis, such as the heat dissipation area of ​​the DMD. It is assumed that the cooling fan corresponding to the DMD is the cooling fan connected to the FAN1_DRIVE pin, and a MCP9800 is used as the temperature detection chip in the heat dissipation area of ​​the DMD. The DDP3020 controls the operation and / or stop of the cooling fan through PWM pulses, and the DDP3020 reads out the current temperature information detected by the MCP9800 in real time through the IIC bus. If the current temperature is lower than the minimum temperature preset in the software, the FAN1_DRIVE pin The duty cycle of the PWM signal becomes zero, the cooling fan stops running; otherwise, the cooling fan will continue to run. After the cooling fan stops running, the projector can be instructed to shut down, and the projector can be c...

Embodiment 3

[0041] Embodiment 3, a method for controlling the operation state of the above-mentioned projector cooling fan, detects the current temperature of the key components in the chassis, such as the DMD and the heat dissipation area of ​​the circuit board. It is assumed that the cooling fan I corresponding to the DMD is the cooling fan connected to the FAN1_DRIVE pin, and the cooling fan II corresponding to the circuit board is assumed to be the cooling fan connected to the FAN2_DRIVE pin. The DMD and the heat dissipation area of ​​the circuit board respectively use a MCP9800 as a temperature detection chip. The DDP3020 controls the operation and / or stop of the cooling fan I through PWM pulses, and the DDP3020 reads out the first current temperature information detected in real time by one of the MCP9800s through the IIC bus. If the first current temperature is lower than the preset value in the software At the first preset temperature (minimum temperature), the duty cycle of the PW...

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Abstract

The invention discloses a projector and a control method of the running state of a cooling fan of the projector and is characterized in that temperature of essential parts in heat dissipation areas inside a case is detected, the corresponding cooling fan starts to run or keeps running when the detected temperature is higher than or equal to the given temperature while the corresponding cooling fan stops running when the detected temperature is lower than the given temperature. By detecting the temperature of selected corresponding essential parts inside the case of the projector, the control method of the invention controls the running states of corresponding cooling fans, optimizes the running time of the fans, ensures the service life of the machine, saves the energy and reduces the consumption at the same time.

Description

technical field [0001] The present invention mainly relates to a projector, and also relates to a method for controlling the operation state of the cooling fan of the projector. Background technique [0002] At present, most projectors—the light source generally use ultra-high pressure mercury lamps. The heat of the lamp itself is relatively high. In order to ensure the life and reliability of the internal components of the machine, it is necessary to let the cooling fan of the chassis work for a period of time after the shutdown. The shutdown time is generally fixed and will not change due to the temperature in the machine, so sometimes the temperature in the machine is still high, but the cooling time stops until the cooling fan stops running, which affects the life of the machine; sometimes the machine is turned on for a short time. Shut down, no need to dissipate heat for a long time. In this case, the cooling fan still works for a long time, which is easy to cause ener...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03B21/16G03B21/00G05D23/19
Inventor 尚军辉苗永平高维嵩李春圃
Owner HISENSE VISUAL TECH CO LTD
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