CN204229107U - A kind of projection display apparatus - Google Patents
A kind of projection display apparatus Download PDFInfo
- Publication number
- CN204229107U CN204229107U CN201420694177.1U CN201420694177U CN204229107U CN 204229107 U CN204229107 U CN 204229107U CN 201420694177 U CN201420694177 U CN 201420694177U CN 204229107 U CN204229107 U CN 204229107U
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- catoptron
- dust
- projection display
- display apparatus
- rolling curtain
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
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- General Physics & Mathematics (AREA)
- Projection Apparatus (AREA)
Abstract
The utility model provides a kind of projection display apparatus, after the catoptron solving projection display apparatus overstocks dust, needs wiping may cause the damage of mirror mirror thus affects the problem of display effect.Comprise the catoptron for reflective projection camera lens emergent light and catoptron dust arrester; Catoptron dust arrester comprises high pressure and produces power supply, high-field electrode and air channel.When projection display equipment does not work, catoptron dust arrester produces the air in high pressure ionization catoptron primary air separating duct, the air be ionized to as positive ion and negative ion can adsorb with positive charge and electronegative dust, thus play also can the technique effect of dedusting without the need to wiping, avoid the problem of the mirror surface damage that the dedusting of wiping reflex mirror may cause.
Description
Technical field
The utility model relates to optical field, is specifically related to a kind of projection display apparatus.
Background technology
Existing projection display apparatus, from camera lens sends and through the reflection of catoptron, the most at last coloured image be projected to screen on after the light launched being converged to DMD (digital micromirror device) from LASER Light Source.
Catoptron in projection display apparatus, the usually exposed outside at projection display apparatus, can cause following problem: exposed for a long time like this, easily makes catoptron overstock dust; Dust granule usually can with positive charge or negative charge, if cleared up not in time, the dust not only overstock can reduce the sharpness of display image, and electrostatic reaction damage equipment can occur time serious.
Clean in order to what keep on catoptron, need the dust that frequent wiping reflex mirror is piled up, but due to catoptron be high precision optical device, be sensing unit, should not touch with hand, easily cause mirror surface damage when wiping and affect Projection Display effect.
Utility model content
The embodiment of the present application, by providing a kind of projection display apparatus, easily causes catoptron to damage thus the technical matters of reduction Projection Display effect to solve when the catoptron of clean projection display apparatus.
For solving the problems of the technologies described above, the embodiment of the present application is achieved by the following technical solutions:
Propose a kind of projection display apparatus, comprise the catoptron for reflective projection camera lens emergent light, it is characterized in that, also comprise catoptron dust arrester; Described catoptron dust arrester comprises high pressure and produces power supply, high-field electrode and air channel.
Further, described projection display apparatus also comprises the dust-proof rolling curtain being placed in described catoptron front, and the support of fixing described catoptron.
Further, described dust-proof rolling curtain and described support are metal material and make.
Further, described high-field electrode comprises positive pole and negative pole; Described just very described dust-proof rolling curtain, described negative pole is described support.
Further described high pressure is produced power supply and is connected by wire with described dust-proof rolling curtain, and is provided with switch.
Further, described dust-proof rolling curtain and described set spacing are 2.5 ~ 3mm, and the voltage that described high pressure produces power supply generation is 9kV instantaneous high pressure.
Further, described high pressure generation power supply comprises oscillation signal generator, input power and switch transformer; The signal output part of described oscillation signal generator is connected the input end of described switch transformer with described input power.
Further, the space between described dust-proof rolling curtain and described catoptron forms described air channel.
Further, described air channel also comprises the fan being placed in described air channel side.
Further, described fan is the air inlet fan and the air outlet fan that are placed in described air channel two side ends respectively.
Compared with prior art, the technical scheme that the embodiment of the present application provides, the technique effect had or advantage are: the embodiment of the present application is by providing a kind of projection display apparatus, arrange catoptron dust arrester in the front of the catoptron of projection display apparatus, this catoptron dust arrester comprises high pressure and produces power supply, high-field electrode and air channel, when projection display apparatus is idle, catoptron dust arrester produces instantaneous pressure in air channel, this instantaneous pressure can produce a stable high-strength electric field, air ionization in air channel is become positive ion and negative ion, positive ion can adsorb attached electronegative dust on the mirror, and negative ion can adsorb attached positively charged dust on the mirror, thus achieve the effect of the dust granule removing positively charged and negative charge, reach the object of electrostatic precipitation, effectively can remove the dust of mirror mirror on the one hand, prevent dust over time from overstocking the quality reducing image on the mirror, it also avoid the problem of the mirror surface damage that the dedusting of direct wiping reflex mirror may cause on the other hand.
Accompanying drawing explanation
Fig. 1 is the structural representation of the projection display apparatus that the embodiment of the present application proposes;
Fig. 2 is the structural representation of the projection display apparatus that the embodiment of the present application proposes.
Embodiment
The embodiment of the present application is by providing a kind of projection display apparatus, after overstocking dust with the catoptron solving projection display apparatus in prior art, need the mirror surface damage that wiping may cause, and then reduce the technical matters of Projection Display effect, by increasing catoptron dust arrester, when projection display equipment does not work, catoptron dust arrester produces the air in high pressure ionization catoptron primary air separating duct, be ionized to the air energy neutral zone positive charge for positive ion and negative ion and electronegative dust, thus play also can the technique effect of dedusting without the need to wiping, avoid the possibility of wiping dedusting damage mirror mirror, ensure that the display effect of projection-display image.
In order to better understand technique scheme, below in conjunction with Figure of description and concrete embodiment, technique scheme is described in detail.
As depicted in figs. 1 and 2, be the structural representation of the projection display apparatus of the embodiment of the present application proposition.
The projection display apparatus that the embodiment of the present application proposes comprises catoptron 101 and is placed in the catoptron dust arrester in catoptron front; Catoptron dust arrester comprises high pressure and produces power supply 2043, high-field electrode and air channel.
When projection display apparatus is idle, the instantaneous pressure that catoptron dust arrester produces can produce a stable high-strength electric field, air ionization in air channel is become positive ion and negative ion, positive ion can adsorb attached electronegative dust on the mirror, and negative ion can adsorb attached positively charged dust on the mirror, thus achieve the effect of the dust granule removing positively charged and negative charge, reach the object of electrostatic precipitation, effectively can remove the dust of mirror mirror, prevent dust over time from overstocking the quality reducing image on the mirror, more avoid the problem of the mirror surface damage that the dedusting of direct wiping reflex mirror may cause.
Concrete, as shown in Figure 1, high-field electrode comprises positive pole 2041 and negative pole 2042 to catoptron dust arrester; High pressure produces power supply 2043 and positive pole is connected with switch 2044.Switch can be set to hand switch, and the manual closing switch when catoptron dust arrester opened by needs, also can be set to electric-controlled switch, this programme will not limit.
High pressure produces power supply and comprises oscillation signal generator Z1, input power Vin and switch transformer T1; The signal output part of oscillation signal generator and the input end of input power connecting valve transformer.Oscillation signal generator produces PWM (pulse-length modulation) signal, the primary input terminal of connecting valve transformer, for controlling the output frequency of the high-voltage dc voltage produced, Vin value+120V; Elementary low-voltage dc voltage is converted to secondary high-voltage dc voltage by switch transformer, and the high-voltage dc voltage of generation is Vo; The number of turn of the armature winding of switch transformer represents with Np, and the number of turn of secondary winding represents with Ns, and the duty cycle signals that oscillation signal generator provides represents with Ton, then
during embody rule, peripheral circuit can be added between oscillation signal generator and switch transformer, make pwm signal input switch transformer after the filtering of the voltage stabilizing of switching tube, voltage stabilizing diode and capacitor, inductance, the elementary low-voltage dc voltage of input connects into switch transformer after the filtering of inductance and capacitor.
Positive pole in catoptron dust arrester and negative pole can be arranged specially, also can choose device according to the structure of projection display apparatus self to arrange, such as shown in Fig. 2, the projection display apparatus that the embodiment of the present application provides also comprises support 102 and is placed in the dust-proof rolling curtain 203 in catoptron front, catoptron is fixed on this support, this support is made by metal material, and dust-proof rolling curtain also adopts metal material (such as Metal wire material) to make.The dust-proof rolling curtain adopting Metal wire material to make is used as positive pole, metal support is used as negative pole, according to the design feature of projection display apparatus self, choose metal device compatible as both positive and negative polarity use, save design space and the cost of special positive pole and negative pole.In the embodiment of the present application, high pressure is produced power supply and is connected by wire with dustproof shade, and is provided with switch 2044.
Generally, the positive pole in catoptron dust arrester and the spacing between negative pole and high pressure produce the relation between high pressure that power supply produces, and demand fulfillment every millimeter distance produces 3kV voltage, and air ionization can be realized to become negative ions; In the embodiment of the present application, the spacing of dust-proof rolling curtain and support at 2.5mm-3mm, then need produce power supply by high pressure and produce the ionization effect that 9kV instantaneous high pressure can realize air.
Space between dust-proof rolling curtain and catoptron constitutes above-mentioned air channel, generally, after air in air channel is become negative ions by the high pressure ionization that high pressure generation power supply produces, adsorb the dust being attached to the band positive and negative charge that mirror surface overstocks, then flow out air channel by the natural flow of air.Preferably, in the end side in air channel, fan is set, accelerated the flowing of air in air channel by the running of fan, to make after being ionized in air channel and the air having adsorbed band positive and negative charge dust forms one air-flow leaves air channel fast, the efficiency of electrostatic precipitation can be improved.
As shown in Figure 1, the both end sides in air channel arranges an air inlet fan 201 and air outlet fan 202 to a more excellent embodiment respectively; Air inlet fan is dried, and air outlet fan air draught, to make after being ionized in air channel and the air having adsorbed band positive and negative charge dust forms one air-flow leaves air channel fast, can improve the efficiency of electrostatic precipitation.
Usually, projection display apparatus can possess the radiator fan at work for dispelling the heat; In the embodiment of the present application, the radiator fan of the fan multiplexed projection display device of air channel two side ends, the effect of saving device and structure space can be played, namely, the air inlet radiator fan of the air inlet fan multiplexed projection display device of air channel one side, and the air outlet radiator fan of the air outlet fan multiplexed projection display device of another side of air channel.
As shown in Figure 2, in the projection display apparatus that the embodiment of the present application provides, also comprise rotating shaft 103, lower rotary shaft 104 and gear 105; Upper rotating shaft and lower rotary shaft are separately fixed at the two ends up and down of catoptron, and a gear is fixed at the two ends of upper rotating shaft and lower rotary shaft respectively; Two avris of dust-proof rolling curtain offer equally spaced pilot hole 2031 respectively, and the spacing of pilot hole is equal with the space width of gear, after the pilot hole of dust-proof rolling curtain passes the tooth of the gear at upper rotating shaft and lower rotary shaft two ends, dust-proof rolling curtain is fixed between upper rotating shaft and lower rotary shaft.
The gear at the pilot hole of dust-proof rolling curtain both sides and upper rotating shaft and lower rotary shaft two ends coordinates and is even more important, and because the tooth of gear is through the pilot hole of dust-proof rolling curtain both sides, when pinion rotation, this fixed relationship makes gear driven dust-proof rolling curtain move together.The structure of above-mentioned dust-proof rolling curtain device, when projection display apparatus is started working, when lower rotary shaft rotates, gear rotates together, thus drives dust-proof rolling curtain to move down, when dust-proof rolling curtain moves, on the one hand by axis of rotation on the gear driven of upper rotating shaft, make dust-proof rolling curtain continue to move down, on the other hand, the dust-proof rolling curtain shifted out downwards is twisted on lower rotary shaft, achieve and dust-proof rolling curtain is removed before catoptron, ensure that being uncovered of catoptron can normally work.In like manner, when projection display apparatus quits work, lower rotary shaft rotates backward, and dust-proof rolling curtain is moved up, and realizes dust-proof rolling curtain protection in the front of catoptron.
One roller shutter motor 109 is connected to lower rotary shaft either side, rotates for driving lower rotary shaft.When projection display apparatus is started working, roller shutter motor drives lower rotary shaft to rotate drive dust-proof rolling curtain and moves; And when projection display apparatus quits work, roller shutter motor drives lower rotary shaft to rotate round about and drives dust-proof rolling curtain oppositely movement.Roller shutter motor is controlled by the motor drive circuit 110 be attached thereto.
One brake rod 106 is laterally fixed on dust-proof rolling curtain, is respectively fixed with upper limit position switch 107 and lower position switch 108 at the two ends up and down of the arbitrary vertical avris of support.When dust-proof rolling curtain moves up and down, brake rod is driven to move up and down; Concrete, when dust-proof rolling curtain moves down, after one end of brake rod touches lower position switch, roller shutter motor stops driving dust-proof rolling curtain to move down, when dust-proof rolling curtain moves up, after one end of brake rod touches upper limit position switch, roller shutter motor stops driving dust-proof rolling curtain to move up.
During projection display apparatus start work, roller shutter motor drive circuit drives roller shutter motor operations, roller shutter motor drives lower rotary shaft to rotate, driving dust-proof rolling curtain to move up twists in rotating shaft, brake rod rises with dust-proof rolling curtain, until touch upper limit position switch, roller shutter motor stops driving at once, thus realizes dust-proof rolling curtain to remove before catoptron; When projection display apparatus shutdown quits work, roller shutter motor drive circuit drives roller shutter motor operations, roller shutter motor drives lower rotary shaft to rotate, driving dust-proof rolling curtain to move down twists on lower rotary shaft, brake rod declines with dust-proof rolling curtain, until touch lower position switch, roller shutter motor stops driving at once, thus shelters from catoptron before realizing that dust-proof rolling curtain is moved to catoptron.
After dust-proof rolling curtain shelters from catoptron, namely the space formed between dust-proof rolling curtain and catoptron defines air channel.Roller shutter motor can be set in dust-proof rolling curtain is moved to after before catoptron, also namely after shutdown, open the work of catoptron dust arrester, also can be set in projection display apparatus when not working, manually opened catoptron dust arrester work; In a word, when projection display apparatus does not work, its light source, ray machine, camera lens and catoptron are all idle, only have catoptron dust arrester in work, ensure that above-mentioned device can not by the damage of high-voltage electric shock.
When catoptron dust arrester produces high pressure, dust-proof rolling curtain voltage is only had to be 9KV, electric current very little (for microampere order), and also seldom can go after quitting work to touch dust-proof rolling curtain, therefore the possibility that damages human body of this catoptron dust arrester is minimum.
The projection display apparatus that the embodiment of the present application provides, when projection display apparatus does not work, dust-proof rolling curtain shelters from catoptron, a duct space is formed with catoptron, the blower fan and the exhaust fan that are placed in catoptron two ends work simultaneously, the air in air channel is made to form one air-flow, and this air-flow is become negative ions by the high pressure ionization that catoptron dust arrester produces, the negative ions air-flow of movement is in motion process, take away the dust granule of attachment positively charged or negative charge on the mirror, thus serve the effect of dedusting, this dedusting method does not need manual wiping reflex mirror, catoptron can not be damaged, also Projection Display effect can not be reduced because of causing the damage of catoptron during wiping reflex mirror, solve after in prior art, the catoptron of projection display apparatus overstocks dust, need wiping and cause catoptron to damage the technical matters reducing Projection Display effect.
By the projection display apparatus that the embodiment of the present application provides; ionized air is adopted to become positive negative ion; carry out the mode of the dust granule with tape transport positive and negative charge, avoid manual wiping reflex mirror, serve the effect of safe dedusting and protection catoptron and projection display apparatus.
It should be noted that; above-mentioned explanation is not to restriction of the present utility model; the utility model is also not limited in above-mentioned citing; the change that those skilled in the art make in essential scope of the present utility model, modification, interpolation or replacement, also should belong to protection domain of the present utility model.
Claims (2)
1. a projection display apparatus, comprises the catoptron for reflective projection camera lens emergent light, it is characterized in that, also comprises catoptron dust arrester; Described catoptron dust arrester comprises high pressure and produces power supply, high-field electrode and air channel.
2. projection display apparatus according to claim 1, is characterized in that, described projection display apparatus also comprises the dust-proof rolling curtain being placed in described catoptron front, and the support of fixing described catoptron.
3. projection display apparatus according to claim 2, is characterized in that, described dust-proof rolling curtain and described support are metal material and make.
4. projection display apparatus according to claim 3, is characterized in that, described high-field electrode comprises positive pole and negative pole; Described just very described dust-proof rolling curtain, described negative pole is described support.
5. projection display apparatus according to claim 4, is characterized in that, described high pressure is produced power supply and is connected by wire with described dust-proof rolling curtain, and is provided with switch.
6. projection display apparatus according to claim 4, is characterized in that, described dust-proof rolling curtain and described set spacing are 2.5 ~ 3mm, and the voltage that described high pressure produces power supply generation is 9kV instantaneous high pressure.
7. projection display apparatus according to claim 1, is characterized in that, described high pressure produces power supply and comprises oscillation signal generator, input power and switch transformer; The signal output part of described oscillation signal generator is connected the input end of described switch transformer with described input power.
8. projection display apparatus according to claim 2, is characterized in that, the space between described dust-proof rolling curtain and described catoptron forms described air channel.
9. projection display apparatus according to claim 1, is characterized in that, described air channel also comprises the fan being placed in described air channel side.
10. projection display apparatus according to claim 9, is characterized in that, described fan is the air inlet fan and the air outlet fan that are placed in described air channel two side ends respectively.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420694177.1U CN204229107U (en) | 2014-11-18 | 2014-11-18 | A kind of projection display apparatus |
| PCT/CN2015/072761 WO2016078242A1 (en) | 2014-11-18 | 2015-02-11 | Projection display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420694177.1U CN204229107U (en) | 2014-11-18 | 2014-11-18 | A kind of projection display apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204229107U true CN204229107U (en) | 2015-03-25 |
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ID=52927186
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420694177.1U Active CN204229107U (en) | 2014-11-18 | 2014-11-18 | A kind of projection display apparatus |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN204229107U (en) |
| WO (1) | WO2016078242A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106154701A (en) * | 2015-03-27 | 2016-11-23 | 海信集团有限公司 | The dust prevention system of LASER Light Source and laser display system |
| CN108663324A (en) * | 2018-06-19 | 2018-10-16 | 星禾环保科技有限公司 | A kind of mirror assembly and its speculum mounting base |
| CN109622229A (en) * | 2018-12-26 | 2019-04-16 | 武汉万集信息技术有限公司 | Laser radar dust-extraction unit and laser radar |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005106903A (en) * | 2003-09-29 | 2005-04-21 | Canon Inc | Dust removing device for projector |
| JP2005181587A (en) * | 2003-12-18 | 2005-07-07 | Fujinon Corp | Projection type image display device |
| JP2008129534A (en) * | 2006-11-24 | 2008-06-05 | Victor Co Of Japan Ltd | Projection type image display device |
| US8888295B2 (en) * | 2012-07-02 | 2014-11-18 | Disney Enterprises, Inc. | Reflective surface tensioning and cleaning system for pepper's ghost illusion |
| CN203480201U (en) * | 2013-08-30 | 2014-03-12 | 厦门瑞屏电子科技有限公司 | Static electricity elimination and internal dust removal system for rear projection screen |
-
2014
- 2014-11-18 CN CN201420694177.1U patent/CN204229107U/en active Active
-
2015
- 2015-02-11 WO PCT/CN2015/072761 patent/WO2016078242A1/en active Application Filing
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106154701A (en) * | 2015-03-27 | 2016-11-23 | 海信集团有限公司 | The dust prevention system of LASER Light Source and laser display system |
| CN106154701B (en) * | 2015-03-27 | 2020-06-09 | 海信集团有限公司 | Laser light source's dustproof system and laser display system |
| CN108663324A (en) * | 2018-06-19 | 2018-10-16 | 星禾环保科技有限公司 | A kind of mirror assembly and its speculum mounting base |
| CN109622229A (en) * | 2018-12-26 | 2019-04-16 | 武汉万集信息技术有限公司 | Laser radar dust-extraction unit and laser radar |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2016078242A1 (en) | 2016-05-26 |
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