CN1599290A - Rear-projection TV. set with anti-superheat monitoring system and its method - Google Patents
Rear-projection TV. set with anti-superheat monitoring system and its method Download PDFInfo
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- CN1599290A CN1599290A CNA031392695A CN03139269A CN1599290A CN 1599290 A CN1599290 A CN 1599290A CN A031392695 A CNA031392695 A CN A031392695A CN 03139269 A CN03139269 A CN 03139269A CN 1599290 A CN1599290 A CN 1599290A
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Abstract
A anti-superheat monitoring system of the rear-projection television includes the MCU, temperature detect device, bare engine control module, power switch control module and display screen. It controls the temperature of the devices within certain scale through temperature monitoring and warning system. It can realize the self-maintenance and guarantee the back casting television in the safe mode without the man-made interference.
Description
Technical field
The present invention relates to a kind of rear-projection TV set and method for supervising thereof, block at rear-projection TV set screen pack accident specifically and the internal components problems of excessive heat that causes with anti-thermal monitoring system.
Background technology
Domestic demand for rear-projection TV set grows with each passing day at present, and the consumer has higher requirement for the serviceability and the fail safe of rear-projection TV set.
Based on the use principle of projection imaging, adopt powerful heating element in the rear-projection TV set in large quantities, thereby the rear-projection TV set of existing Design Mode adopts the mode of convection current cooling mostly, convection fan promptly is set lowers the temperature for the rear-projection TV set internal components.Corresponding to said structure, screen pack can be set at the ventilating opening place usually be inhaled in the cabinet to stop particles such as dust.
It is the performance that does not influence inner various precision optics for the filtering air that screen pack is set, if but the long-time back screen pack that uses is blocked by dust granule, not only do not have the effect of filtered air, also can directly cause cabinet inside device heat radiation not smooth, thereby cause faults such as damage that internal electron, optics occur because of local temperature is too high, deadlock.
Summary of the invention
Rear-projection TV set and method for supervising thereof with anti-thermal monitoring system of the present invention, promptly at improve the problems referred to above and deficiency, by setting up temperature monitoring and warning system, make internal components temperature Be Controlled within the specific limits.Need not to realize automatic maintenance under the prerequisite of human intervention, guaranteeing that rear-projection TV set is under the mode of operation of safe operation.
Rear-projection TV set of the present invention has prevented including systematic microprocessor MCU, temperature-detecting device, ray machine control module, mains switch control module and display screen by thermal monitoring system.
System MCU, the execution of the operation of monitoring whole system and setting program instruction.
Temperature-detecting device is in order to the variations in temperature of main devices in the real-time detection cabinet.Temperature detecting module comprises the potential-divider network that is made of voltage comparator, temperature value can be converted into magnitude of voltage and transport to and carry out real-time judge among the MCU.
Adopt temperature-sensing elements such as thermistor or temperature relay in the potential-divider network, to realize the effect of real-time detected temperatures.Utilize temperature-sensing element to vary with temperature and characteristic that resistance changes, when changing, temperature can cause the variation of place potential-divider network magnitude of voltage, therefore system MCU can detect temperature anomaly whether occurs, and can make other modules execution in corresponding instruction, the control system in view of the above.
Of the present inventionly prevent thermal monitoring system, set the secondary alarm mechanism.Set first order alarm temperature T1, second level alarm temperature T2.
When system detects temperature when reaching the first order and reporting to the police, send alarm command, i.e. display alarm signal or prompting on display screen by MCU control;
When system detects temperature when reaching the second level and reporting to the police, send alarm command by MCU control, carry out in display alarm signal or prompting on the display screen, while control ray machine control module behind the time-delay certain hour and end ray machine work and control the mains switch control module to enter the STANDBY pattern.
Rear-projection TV set of the present invention prevents that overheated method for supervising is, the operation by systematic microprocessor MCU control supervisory control system receives in real time, judges the magnitude of voltage that temperature detecting module is imported, and changes according to magnitude of voltage and judges the temperature in chassis amplitude of variation.
The detection module of temperature-detecting device comprises the potential-divider network that is made of voltage comparator, by potential-divider network temperature value is converted into magnitude of voltage and inputing among the MCU in real time, thereby variations in temperature can be fed back among the MCU by change in voltage and judge.
Judge main devices such as ray machine by MCU according to real-time detected temperature value, whether its working temperature is abnormal, promptly enter in the first order or the second level alarm mechanism.If working temperature does not reach wherein arbitrary grade of warning, system MCU does not send any temperature and intervenes processing signals;
If the temperature of main devices such as ray machine meets or exceeds the first order and reports to the police, then system MCU sends first order alarm command, and shows relevant warning message at display screen, in time takes treatment measures to remind the user.
If the not onset of manual intervention or cooling measure is not arranged, and cause temperature to meet or exceed second level alarm temperature, then system MCU sends second level alarm command, except that the relevant warning message of demonstration on the display screen, delay time simultaneously and send instruction behind the certain hour and turn off ray machine, power supply enters the STANDBY pattern simultaneously.
This moment, power supply was only powered to system MCU.When treating temperature that the ray machine system of being cooled to can operate as normal, send instruction by system MCU and allow power supply become normal mode of operation, open ray machine simultaneously and carry out operate as normal by the STANDBY mode switch.
Have the rear-projection TV set and the method for supervising thereof of anti-thermal monitoring system as described in the present invention, have the following advantages and beneficial effect:
1, at the rear-projection TV set that uses screen pack, can realize temperature in chassis monitoring and emergency processing in real time, can prevent effectively that various precision optics from damaging because of overheated;
2, monitoring temperature can shut down voluntarily after overheated and wait for that manual intervention handles, if no artificial processing can also be after device cools off recovery system mode of operation voluntarily, have bigger automatic control performance;
3, show by the first order or second level warning message, can in time notify the user to handle, thereby have man-machine interface preferably.
Description of drawings
Fig. 1 is a module diagram of preventing thermal monitoring system;
Fig. 2 is the flow chart of anti-overheated method for supervising;
Fig. 3 is about critical pieces such as ray machine " temperature-life-span " result of the test reference diagram.
Fig. 4 is the temperature detecting module circuit diagram;
Embodiment
As Fig. 1, shown in Figure 4, rear-projection TV set of the present invention has prevented mainly including thermal monitoring system: systematic microprocessor MCU, temperature-detecting device, ray machine control module, mains switch control module (STANDBY) and display screen (OSD or LED).
Wherein, the execution of the operation of system MCU monitoring whole system and setting program instruction;
Temperature-detecting device is in order to the variations in temperature of main devices in the real-time detection cabinet, and as shown in Figure 4, temperature detecting module comprises the voltage comparator of being made up of OA1 and OA2, will deliver among the MCU because of the change in voltage situation that temperature fluctuation causes and judge.
Use thermistor R to detect the interior ambient temperature of cabinet.When variations in temperature, the resistance of thermistor R increases, and then the magnitude of voltage of potential-divider network OA1 and OA2 raises, and the numerical value that temperature raise and the raise this moment just change of team is the numerical value that voltage raises, voltage raises, and input feeds back among the MCU.
When the temperature in the rear-projection TV set surpasses 60 ℃ or 65 ℃, potential-divider network input relevant voltage value, detect system temperature by MCU this moment and reach one-level warning or secondary warning, then MCU controls respectively and sends alarm command, i.e. display alarm signal or prompting on display screen; When reaching the secondary warning, also can carry out the work of termination ray machine by MCU control ray machine control module after 10 seconds in time-delay, control the mains switch control module simultaneously and enter the STANDBY pattern.
The rear-projection TV set working power only is cooled to system's normal working temperature to MCU power supply, wait ray machine or is handled by human intervention at this moment, until will causing that the too high fault of rear-projection TV set temperature in chassis excludes, be about to screen pack and clean to guarantee cabinet inner air flow or cooling fan working properly etc.
As shown in Figure 2, the anti-overheated method for supervising of rear-projection TV set of the present invention is, operation by systematic microprocessor MCU control supervisory control system receives in real time, judges the magnitude of voltage that temperature detecting module is imported, and changes according to magnitude of voltage and judges the temperature in chassis amplitude of variation.
This method is set the secondary alarm mechanism, and setting 60 ℃ is one-level warning critical temperature, and setting 65 ℃ is secondary warning critical temperature.
The detection module of temperature-detecting device comprises the potential-divider network that is made of voltage comparator, by potential-divider network temperature value is converted into magnitude of voltage and inputing among the MCU in real time, thereby variations in temperature can be fed back among the MCU by change in voltage and judge.
Judge main devices such as ray machine by MCU according to real-time detected temperature value, whether its working temperature is abnormal, promptly enter in one-level or the secondary alarm mechanism.Do not report to the police if working temperature reaches one-level, system MCU does not send any temperature and intervenes processing signals;
If when the temperature of main devices such as ray machine met or exceeded 60 ℃, system MCU sent the one-level alarm command, and show relevant warning message, in time take treatment measures, as changing screen pack, opening cabinet and cool off etc. to remind the user at display screen.
If the not onset of manual intervention or cooling measure is not arranged, cause temperature to meet or exceed 65 ℃, then, system MCU sends the secondary alarm command, except that the relevant warning message of demonstration on the display screen, sent instruction by system MCU after delaying time simultaneously 10 seconds and turn off ray machine, power supply enters the STANDBY pattern simultaneously.
This moment, power supply was only powered to system MCU.When treating temperature that the ray machine system of being cooled to can operate as normal, send instruction by system MCU and allow power supply become normal mode of operation, open ray machine simultaneously and carry out operate as normal by the STANDBY mode switch.
As shown in Figure 3, be explanation design temperature I and II alarm mechanism, be based on the temperature of main devices such as ray machine and the correlation in useful life, in this test of quoting the digital micro-mirror DMD of TIX is example, be that be 20000 hours its useful life under 60 ℃ the operating mode as DMD in temperature; Under 65 ℃ operating mode, foreshorten to 10000 hours its useful life.
This shows, comprise that useful life and its working temperature of the optics of DMD has close getting in touch.
Claims (6)
1, a kind of rear-projection TV set with anti-thermal monitoring system is characterized in that: prevented that thermal monitoring system mainly included systematic microprocessor MCU, temperature-detecting device, ray machine control module, mains switch control module and display screen.
2, the rear-projection TV set with anti-thermal monitoring system according to claim 1, it is characterized in that: temperature detecting module comprises the potential-divider network that is made of voltage comparator, adopts the temperature-sensing element of real-time detected temperatures in potential-divider network.
3, the rear-projection TV set with anti-thermal monitoring system according to claim 2, it is characterized in that: the temperature-sensing element that potential-divider network adopts is thermistor or temperature relay.
4, the anti-overheated method for supervising of a kind of rear-projection TV set is characterized in that: by the operation of systematic microprocessor MCU control supervisory control system, the magnitude of voltage of reception in real time, the input of judgement temperature detecting module changes the variations in temperature of judging in the cabinet according to magnitude of voltage;
When temperature met or exceeded alarm temperature, system MCU sent alarm command, was showing relevant warning message on the display screen and/or was sending after time-delay a period of time that ray machine is turned off in instruction, the control power supply enters the STANDBY pattern.
5, the anti-overheated method for supervising of rear-projection TV set according to claim 4, it is characterized in that: the temperature detecting module that constitutes by the potential-divider network that includes temperature-sensing element, temperature value is converted into magnitude of voltage and inputs in real time that MCU judges and make corresponding instruction in view of the above, other modules are carried out in the control system.
6, the anti-overheated method for supervising of rear-projection TV set according to claim 5, it is characterized in that: set the secondary alarm mechanism, first order alarm temperature T1 is 60 ℃, and second level alarm temperature T2 is 65 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031392695A CN1255986C (en) | 2003-09-20 | 2003-09-20 | Rear-projection TV. set with anti-superheat monitoring system and its method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031392695A CN1255986C (en) | 2003-09-20 | 2003-09-20 | Rear-projection TV. set with anti-superheat monitoring system and its method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1599290A true CN1599290A (en) | 2005-03-23 |
| CN1255986C CN1255986C (en) | 2006-05-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB031392695A Expired - Lifetime CN1255986C (en) | 2003-09-20 | 2003-09-20 | Rear-projection TV. set with anti-superheat monitoring system and its method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103809631A (en) * | 2013-12-31 | 2014-05-21 | 华为技术有限公司 | Control method and electronic system of anti-dust device |
| CN108695819A (en) * | 2017-03-30 | 2018-10-23 | 英飞凌科技股份有限公司 | Electrical fuse circuit and method for operating electronic switch |
| CN109144132A (en) * | 2018-08-29 | 2019-01-04 | 青岛海信电子设备股份有限公司 | Show the method for excessive heating protection and display equipment of equipment |
| CN112596402A (en) * | 2020-12-09 | 2021-04-02 | 青岛海尔空调器有限总公司 | Method and device for safety protection of intelligent household equipment and intelligent household equipment |
-
2003
- 2003-09-20 CN CNB031392695A patent/CN1255986C/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103809631A (en) * | 2013-12-31 | 2014-05-21 | 华为技术有限公司 | Control method and electronic system of anti-dust device |
| CN103809631B (en) * | 2013-12-31 | 2016-08-17 | 华为技术有限公司 | The control method of a kind of dust guard and electronic system |
| CN108695819A (en) * | 2017-03-30 | 2018-10-23 | 英飞凌科技股份有限公司 | Electrical fuse circuit and method for operating electronic switch |
| CN108695819B (en) * | 2017-03-30 | 2020-06-16 | 英飞凌科技股份有限公司 | Electronic fuse circuit and method for operating an electronic switch |
| US10868418B2 (en) | 2017-03-30 | 2020-12-15 | Infineon Technologies Ag | Electronic switch for electronic fuse |
| CN109144132A (en) * | 2018-08-29 | 2019-01-04 | 青岛海信电子设备股份有限公司 | Show the method for excessive heating protection and display equipment of equipment |
| CN112596402A (en) * | 2020-12-09 | 2021-04-02 | 青岛海尔空调器有限总公司 | Method and device for safety protection of intelligent household equipment and intelligent household equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1255986C (en) | 2006-05-10 |
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Granted publication date: 20060510 |