CN1671196A - Automatic detection alarm device and method for dust filter of projection type image display instrument - Google Patents
Automatic detection alarm device and method for dust filter of projection type image display instrument Download PDFInfo
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- CN1671196A CN1671196A CN 200410021406 CN200410021406A CN1671196A CN 1671196 A CN1671196 A CN 1671196A CN 200410021406 CN200410021406 CN 200410021406 CN 200410021406 A CN200410021406 A CN 200410021406A CN 1671196 A CN1671196 A CN 1671196A
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Abstract
An automatic alarm device and method thereof for detecting whether the dust filter of image display is normal, which contains air blow rate test for judging filter replacing time, current test for judging fan blower normal or off normal, computer comparing the detected air blowing rate and current of blower with the preset standard coefficient, according to the compared result to replace dust filter or alarm to fan blower in off normal state, in order to insure equipment stability and raise performance.
Description
Technical field
The present invention will be referred to prevent in a kind of projection-type image display apparatus filter that dust flows to optical instrument whether normal detection and warning device and method automatically.
Background technology
Projection-type image display apparatus is as utilizing the light source of lamp, by optical instrument, with the equipment of the form display image of big picture, providing big picture, images with high image quality to the user simultaneously, also is furnished with perfect sound system, makes home theater become possibility.Based on this advantage, recently projection-type image display apparatus extensively, promptly popularized.
Such as the basic porjection type television system of LCD specifically comprises following architectural feature: promptly, and light source portion; The transmission of the light that light source sent and treatment channel---optical instrument portion; Based on the light after the processing of optical instrument portion, come the image display chip portion (LCD) of display image; Play the screen section of image among the LCD.CRT common transmissive type television system then specifically comprises following architectural feature: promptly, can make the display chip portion (CRT) of the reconstruction of image; Can enlarge the picture signal that above-mentioned CRT the inside is penetrated, and the optical instrument portion that can realize optical processing; The screen section that image after above-mentioned optical instrument handled shows.In addition, the projection of magic lantern software program also is based on similar structure, according to the difference of mode of delivery, can be divided into front projection type and rear projection-type structure.For the light that makes optical instrument (image source) can project on the screen, also use instrument usually with mirror structure.
Optical instrument is as the important component part in the projection-type image display apparatus, even have ultrafine dust or foreign matter on the optical instrument, also may enlarge with image and be shown on the screen, the image quality of image has been produced very big influence by the projection camera lens.
So, in traditional projection type video display instrument, in order to prevent that dust and foreign matter from flowing on the optical instrument, be provided with a dust filter on air-supply air blast (preventing overheated air-supply air blast) next door, by using this dust filter, can stop the dust and the foreign matter that enter into optical instrument by the outside.So the environment for use of equipment is poor more, or the time of using is long more, and the dust that accumulates on filter is also just more and more, and As time goes on, the performance of dust filter also can reduce gradually.Under these circumstances, be necessary dust filter is carried out regular replacing and cleaning.That is to say, use projection-type image display apparatus, if phenomenon of blocking appears in filter, air blast also just can not normally be supplied with air quantity, therefore, might occur because device interior is overheated, cause reduction of service life, problems such as equipment performance reduction, thus just need dust filter whether unusually, particularly the replacing time of dust filter and the cleaning temporally precise report to the police to the user.
Traditional dust filter is changed the alarm method of time and is realized by the working pressure transducer.As shown in Figure 1, the formation of traditional dust filter equipment of reporting to the police by the working pressure transducer has following architectural feature: promptly,
The air-supply air blast portion 11 of cooling optical instrument; The filter part 12 that is intended to block dust and foreign matter inflow optical instrument that is provided with in the porch of air blast; Near the pressure sensor portion 13 that is intended to detect the inflow air pressure that the air-supply air blast, is provided with; The detected air pressure value of above-mentioned pressure sensor is converted to the A/D converter portion 14 of digital signal; The digital pressure that utilizes above-mentioned A/D converter portion to change judges that dust filter changes the microcomputer portion 15 of time, shows the display part 16 of above-mentioned microcomputer portion judged result.
Below, the dust filter that has the traditional projection-type image display apparatus of said structure feature with reference to 1 pair in accompanying drawing is changed the warning device of time and is described as follows.That is,
Air-supply air blast portion (11) inhaled air flows to optical instrument after through dust filter portion (12) dust and foreign matter being filtered.Pressure sensor portion (13) carries out pressure detecting to the air by dust filter portion (12).The detected air pressure signal of pressure sensor portion (13) converts digital signal to by A/D converter portion (14), input microcomputer portion (15).Microcomputer portion (15) compares the air pressure value of input and the canonical parameter of apparatus settings, if pressure is below setting, then can judge owing to the reduction that has caused pressure is stopped up by dust filter portion (12), this result just shows in display part (16), just can report to the police and should change dust filter to the user.
But, only judge replacing time of dust filter according to inhaled air pressure in the air-supply air blast, the possibility that makes a mistake is very big.That is to say, because the defective of air-supply air blast self, cause taking place the situation of revolution (RPM) reduction of air blast probably, in this case, compare with air output, air pressure also can reduce, and detecting microcomputer portion that pressure reduces, can not to identify this be because the result that the defective of the air blast self of blowing causes but is judged as mistakenly on the contrary and has changed dust filter fully.Therefore, under these circumstances, even changed dust filter, but because the defective of air blast self still exists, so cause identical therewith false judgment still constantly to take place, cause people that the confidence level of commodity is reduced, and unnecessary replacing filter.Under the state of the self-defect that does not solve air blast, continue to use projection-type image display apparatus, may cause equipment performance low, occur breaking down, problem such as image quality reduction.
Particularly the air-supply air blast occur unusual in, air output sharply reduces, and must cause the cooling effect of optical instrument, lamp lowly, causes the overheated of the optical instrument that comprises lamp and accident such as cause that equipment is damaged thus.
Summary of the invention
The objective of the invention is to overcome the problems referred to above, a kind of automatic detection alarm device and method of porjection type CCD image display instrument dust filter of high confidence level is provided.It can consider simultaneously dust filter whether unusual of projection-type image display apparatus and air-supply air blast whether unusually, can really judge it is this replacing dust filter exactly, still dust filter is normal, because the defective of air blast causes the problem that takes place, and judged result is reported to the police to a kind of equipment of user.
The object of the present invention is achieved like this: the automatic detection alarm device of porjection type CCD image display instrument dust filter has following architectural feature, and it comprises: judge the whether unusual air quantity test section of dust filter; Judge the whether unusual blower current test section of air blast; Utilize above-mentioned detected air quantity and current signal, the control part whether unusually the replacing time and the air blast of dust filter are judged; The display part that shows the judged result of above-mentioned control part.
In the automatic detection alarm device of porjection type CCD image display instrument dust filter of the present invention, above-mentioned air quantity test section comprises air flow sensor portion and the air quantity conversion of signals is become the air volume signal handling part of digital signal.Above-mentioned current detecting part comprises current sensor portion and current signal is converted to the current signal handling part of digital signal.If above-mentioned control part comprises that the storage part of storage standards air quantity data value and normalized current data value and the result of determination of above-mentioned control part are that air blast has occurred can cutting off the power supply unit to the lamp power supply unusually.Display part comprises the screen display OSD handling part of the result of determination of exporting above-mentioned control part.
In order to realize above-mentioned purpose, the automatic detection alarm method of porjection type CCD image display instrument dust filter of the present invention comprises following phase characteristic: promptly, detect the detection-phase of dust filter air quantity and blower current; The standard airflow value of above-mentioned detected air volume signal and current signal and apparatus settings and comparison phase that standard current value compares respectively; According to above-mentioned comparative result, to the replacing time of dust filter and the whether unusual decision stage of judging of air-supply air blast; And the stage that above-mentioned result of determination is processed and displayed.
In the whether unusual automatic detection alarm method of porjection type CCD image display instrument dust filter of the present invention, if detected air quantity is normal, but the electric current of air blast is in standard value when following, can judge that air blast has occurred unusually, cuts off the power supply to the lamp power supply; If blower current is normal, the air quantity of perception is in below the standard value, can conclude and change dust filter.
The automatic detection alarm apparatus and method of porjection type CCD image display instrument dust filter of the present invention can automatically be judged the replacing time of dust filter, and can report to the police to the user, can prevent the inflow of dust and foreign substances effectively, therefore can more effectively guarantee the quality of image frame.
And, owing to prevented, having hindered and be intended to carry out the problem that cooled gas flow flows into because dust filter stops up, the device interior temperature rises and the performance that causes thus is low, problems such as equipment damage so can solve effectively.
In addition,, can take corresponding effective measures, so just can guarantee the stable of equipment and raising equipment performance at different situations because the present invention can accurately determine the unusual of the blockage problem of dust filter or air blast itself.
Description of drawings
Fig. 1 is the constitutional diagram of the porjection type CCD image display instrument dust filter autoalarm of conventional art
Fig. 2 is the constitutional diagram of porjection type CCD image display instrument dust filter autoalarm of the present invention
Fig. 3 is the flow chart of porjection type CCD image display instrument dust filter automatic alarm method of the present invention.
(symbol description of the major part of accompanying drawing)
20: dust filter 21: air flow sensor
22: air flow sensor perceptual signal handling part 23: air blast
24: current sensor 25: current sensor perceptual signal handling part
26: microcomputer 27: storage part
28:OSD handling part 29: power supply unit
Embodiment
The present invention will be further described in detail below in conjunction with specific embodiment and accompanying drawing thereof.
Fig. 2 is the formation constitutional diagram of the automatic detection alarm device of porjection type CCD image display instrument dust filter of the present invention, and Fig. 3 is the flow chart of display alarm method.
At first, with reference to Fig. 2, the automatic detection alarm device of porjection type CCD image display instrument dust filter of the present invention is by forming as the lower part: promptly, be intended to the dust filter portion (20) of control of dust; The air flow sensor portion (21) that can detect air quantity that on the passage of above-mentioned dust filter portion, is provided with; Handle the detection signal of air flow sensor portion and pass to the air volume signal handling part (22) of control part; Air blast portion (23); Detect the current sensor portion (24) of air blast portion current sinking; Handle signal that above-mentioned current sensor portion detects and the current signal handling part (25) that passes to control part.Control part comprises: be arranged in the microcomputer, storage is intended to judge that whether unusual dust filter change the storage part (27) of the airflow value of standard of time and air blast normalized current Value Data; Air quantity that air quantity signal processing part and current signal handling part are provided and standard airflow value and the standard current value in current signal and the storage part compare, and judge whether unusual microcomputer portion (26); In microcomputer, show the OSD handling part (28) of above-mentioned result of determination; Under the control of above-mentioned microcomputer portion, when air blast takes place can cut off the power supply unit (29) to the lamp power supply when unusual.
With reference to Fig. 3, specify the automatic detection alarm method of porjection type CCD image display instrument dust filter of the present invention.It is by forming with the next stage: promptly, open the projector stage (S31) of (the porjection type image shows instrument); Start the stage (S32) of above-mentioned air blast; Detect the detection-phase (S33) of air quantity and current sinking; The comparison phase (S34) that the data of having set in detected data value and the storage part are compared; The stage of stage that the result of the above-mentioned comparison of reference judges and processing and demonstration judged result comprises: if the result who judges is that air quantity is unusual, show the demonstration stage (S35) that change dust filter information with OSD; With reference to the result of above-mentioned comparison, if air blast when unusual, then directly cuts off the stage (S36) of lights power supply.
With reference to above-mentioned Fig. 2 and Fig. 3, the operation principle of the automatic detection alarm apparatus and method of porjection type CCD image display instrument dust filter of the present invention is described as follows: promptly,
The user opens device power supply (DPS), the air quantity that flows into by air blast (23) detects in air flow sensor portion (21), convert the signal of telecommunication to, cross amplification and carry out A/D conversion etc. and carry out appropriate signal processing at air volume signal handling part (22) back warp, be stored in microcomputer portion (26) lining with the form of data-signal.Microcomputer portion (26) compares the air volume signal of input and the air quantity data set of storage part (27) lining, confirms whether the air blast air quantity is normal, and whether unusually being recorded in the memory exactly dust filter (20).
On the other hand, the current sinking of air blast portion (23) detects in current sensor portion (24), current signal handling part (25) carries out amplification to the above-mentioned signal that detects by current sensor portion (24) and carries out the A/D conversion and wait and carry out appropriate signal processing, imports microcomputer portion (26) with the form of data-signal.Microcomputer portion (26) compares the air blast current sinking signal of input and the current data set of storage part (27) lining, confirms whether air blast is normal, and whether unusually the information of air blast (23) be recorded in the memory exactly.
Microcomputer portion (26) by replacing time of reading air quantity in the above-mentioned memory and the whether unusual information of air blast and judging dust filter and air blast whether unusually.That is to say that under the situation that dust filter (20) stops up, because air quantity takes place significantly to reduce, detected airflow value is in below the airflow value of apparatus settings, can judge that obstruction has taken place dust filter (20).If because air blast (23) takes place unusually, and in the time of can not moving with normal speed, current sinking reduces, detected blower current value is in to be set below the current value, can judge that air blast (23) has occurred unusually.
With reference to the result of determination of microcomputer portion (26), because dust filter stops up, the information that requires to change dust filter will report to the user by OSD handling part (28) if air blast is not unusual.If air blast portion (23) is judged as and occurs unusually, to reporting to the police unusually of air blast portion (23), and power supply unit (29) controlled, cut off power supply to the lamp supply, so just can prevent owing to the overheated generation that causes the equipment damage situation of lamp.Here, the unusual warning function of air blast portion (23) just as explained above, also is a method of utilizing OSD, and other has abnormal show LED, under the control action of microcomputer portion (26) to LED, can use the method that shuts down.And above-mentioned power supply unit (29) can provide the power supply that comprises sensor part, air blast portion and lamp etc., and is unusual if air blast portion (23) occurs as previously mentioned, under the control of microcomputer portion (26), will cut off the power supply of lamp.
Claims (4)
1, the automatic detection alarm device of porjection type CCD image display instrument dust filter is characterized in that it comprises: judge the whether unusual air quantity test section of dust filter; Judge the current detecting part of the blower current that whether unusual the air-supply air blast is; Utilize above-mentioned detected air quantity and current signal, the control part whether unusually the replacing time and the air blast of dust filter are judged; The display part that shows the judged result of above-mentioned control part.
2,, it is characterized in that above-mentioned air quantity test section comprises air flow sensor portion and the air quantity conversion of signals become the air volume signal handling part of digital signal according to the said automatic detection alarm device of claim 1.Above-mentioned current detecting part comprises current sensor portion and current signal is converted to the current signal handling part of digital signal.Above-mentioned control part comprises the storage part of storage standards air quantity data value and normalized current data value.Display part comprises the OSD handling part of the result of determination of exporting above-mentioned control part and can cut off power supply unit to the lamp power supply.
3, the automatic detection alarm method of porjection type CCD image display instrument dust filter is characterized in that it comprises: the detection-phase that detects dust filter air quantity and air-supply blower current; The standard airflow value of above-mentioned detected air volume signal and current signal and apparatus settings and comparison phase that standard current value compares respectively; According to above-mentioned comparative result, to the replacing time of dust filter and the whether unusual decision stage of judging of air-supply air blast; And the stage that above-mentioned result of determination is processed and displayed.
4, according to the said automatic detection alarm method of claim 3, it is characterized in that the processing and the demonstration stage of judged result are comprised: according to above-mentioned comparing to determine and the result, if the air quantity of perception is normal, but the electric current of air blast is in below the standard value, can be judged to be air blast and occur unusually, cut off stage to the power supply of lamp power supply; If blower current is normal, the air quantity of detection is in below the standard value, shows the demonstration stage that dust filter should be changed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410021406 CN1671196A (en) | 2004-03-16 | 2004-03-16 | Automatic detection alarm device and method for dust filter of projection type image display instrument |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 200410021406 CN1671196A (en) | 2004-03-16 | 2004-03-16 | Automatic detection alarm device and method for dust filter of projection type image display instrument |
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| CN1671196A true CN1671196A (en) | 2005-09-21 |
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| CN 200410021406 Pending CN1671196A (en) | 2004-03-16 | 2004-03-16 | Automatic detection alarm device and method for dust filter of projection type image display instrument |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100555066C (en) * | 2006-03-10 | 2009-10-28 | 株式会社日立制作所 | Display device |
| CN104122964A (en) * | 2014-07-15 | 2014-10-29 | 深圳雅图数字视频技术有限公司 | Dust screen detection method and device in radiating system |
| WO2014178074A3 (en) * | 2013-04-18 | 2015-03-05 | Chirag Satishchandra Mutha | A filter detection based air purification system |
| CN106489079A (en) * | 2014-05-15 | 2017-03-08 | 艾默生环境优化技术有限公司 | Air filter diagnosis based on electric current and monitoring |
| CN109682016A (en) * | 2017-10-19 | 2019-04-26 | 深圳市美好创亿医疗科技有限公司 | Air cleaning facility filter element validation checking system and method |
| CN110268815A (en) * | 2017-03-27 | 2019-09-20 | 雅马哈发动机株式会社 | Surface mounting apparatus |
| CN110279313A (en) * | 2018-03-19 | 2019-09-27 | 特雷格佩列特烤架有限公司 | The grill with component feedback and remotely monitored |
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2004
- 2004-03-16 CN CN 200410021406 patent/CN1671196A/en active Pending
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100555066C (en) * | 2006-03-10 | 2009-10-28 | 株式会社日立制作所 | Display device |
| WO2014178074A3 (en) * | 2013-04-18 | 2015-03-05 | Chirag Satishchandra Mutha | A filter detection based air purification system |
| CN105209144A (en) * | 2013-04-18 | 2015-12-30 | 纳伦德拉·尼尔坎特·帕瓦尔 | A filter detection based air purification system |
| US9662605B2 (en) | 2013-04-18 | 2017-05-30 | Narendra Nilkanth Pawar | Filter detection based air purification system |
| CN105209144B (en) * | 2013-04-18 | 2018-04-03 | 纳伦德拉·尼尔坎特·帕瓦尔 | Air cleaning system based on filter detection |
| CN106489079A (en) * | 2014-05-15 | 2017-03-08 | 艾默生环境优化技术有限公司 | Air filter diagnosis based on electric current and monitoring |
| CN104122964A (en) * | 2014-07-15 | 2014-10-29 | 深圳雅图数字视频技术有限公司 | Dust screen detection method and device in radiating system |
| CN110268815A (en) * | 2017-03-27 | 2019-09-20 | 雅马哈发动机株式会社 | Surface mounting apparatus |
| CN110268815B (en) * | 2017-03-27 | 2020-12-04 | 雅马哈发动机株式会社 | Surface mounting machine |
| CN109682016A (en) * | 2017-10-19 | 2019-04-26 | 深圳市美好创亿医疗科技有限公司 | Air cleaning facility filter element validation checking system and method |
| CN109682016B (en) * | 2017-10-19 | 2021-04-06 | 深圳市美好创亿医疗科技股份有限公司 | Method for detecting effectiveness of filtering unit of air purification equipment |
| CN110279313A (en) * | 2018-03-19 | 2019-09-27 | 特雷格佩列特烤架有限公司 | The grill with component feedback and remotely monitored |
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