CN101963746B - Light source module and projector - Google Patents
Light source module and projector Download PDFInfo
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- CN101963746B CN101963746B CN2010102554668A CN201010255466A CN101963746B CN 101963746 B CN101963746 B CN 101963746B CN 2010102554668 A CN2010102554668 A CN 2010102554668A CN 201010255466 A CN201010255466 A CN 201010255466A CN 101963746 B CN101963746 B CN 101963746B
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Abstract
The invention relates to a light source module and a projector. The light source module comprises a bulb, wherein the bulb comprises a first temperature control part, a second temperature control part and a third temperature control part. The light source module also comprises a cooling part; first airflow, second airflow and third airflow are formed on the cooling part, wherein the first airflow cools the first temperature part of the bulb; the second airflow cools the second temperature control part of the bulb; the third airflow cools the third temperature control part of the bulb; when the projector is in a horizontal using state, the air flow of the second airflow is greater than that of the third airflow; and when the projector is in a suspension using state, the air flow of the third airflow is greater than that of the second airflow. Compared with the traditional design, the light source module can cool a plurality of temperature control part of the bulb simultaneously, can control the air flow blown to the top of the bulb to be maximal according to different using states of the projector, better balances the temperature of the bulb, and prolongs the service life of the bulb.
Description
Technical field
The present invention relates to a kind of light source module and projector, particularly about a kind of light source module and the projector that can cool off the second temperature control portion, the 3rd temperature control portion and the first temperature control portion of bulb simultaneously.
Background technology
The projector of convention comprises reflex housing, bulb and fan.Reflex housing has concave part, and bulb is arranged in this concave part, and the light that bulb sends projects projector after the reflex housing reflection comes together in projector lens.As light source; The bulb that in projector, uses has discharge lamps such as ultrahigh pressure mercury lamp, metal halide lamp, and when moving in projector, the temperature of bulb uprises; The top of bulb, bottom and electrode part all are that the top of important temperature control point, particularly bulb becomes high temperature the most easily.Can bulb temperature be controlled evenly is to influence the reliability of bulb, the key factor in life-span.Method of temperature as reducing bulb mainly effectively utilizes fan to carry out forced air-cooling, but projector does not have to control well simultaneously the cooling scheme of temperature of top, bottom and the electrode part of bulb at present.
At present, projector mainly contains two kinds of user modes, and a kind of is to be positioned on platform or the table, and another kind is to hang on ceiling.When the projector of traditional design was in the platform status use, the temperature at the top of its bulb was the highest, for the temperature of better balance bulb, blowed to the air-flow maximum at the top of bulb, and the top of bulb is cooled off better.But; When this projector is suspended in when being in second kind of state on the ceiling and using, the original top of this bulb is reversed to the bottom at this moment, and the original bottom of this bulb is reversed to the top; Obviously; When being in the suspension user mode, the top of projecting camera light bulb just can't be lowered the temperature preferably, has a strong impact on the serviceable life of bulb.
Summary of the invention
In view of this, the present invention provides a kind of light source module, is applied to projector; This light source module comprises bulb; This bulb comprises the first temperature control portion, the second temperature control portion and the 3rd temperature control portion, and this light source module also comprises cooling end, and this cooling end forms first air-flow, second air-flow and the 3rd air-flow; Wherein, this first temperature control portion of this this bulb of first air-flow cooling, this second temperature control portion of this this bulb of second air-flow cooling, the 3rd temperature control portion of this bulb of the 3rd air-flow cooling; When this projector was in the horizontal user mode, the airshed of this second air-flow was greater than the airshed of the 3rd air-flow; When this projector was in the suspension user mode, the airshed of the 3rd air-flow was greater than the airshed of this second air-flow.
As optional technical scheme; This first temperature control portion is corresponding to the electrode part of this bulb, and this second temperature control portion and the 3rd temperature control portion are corresponding to the different parts of the illuminating part of this bulb, wherein; When this projector is in this horizontal user mode; This second temperature control portion is higher than the 3rd temperature control portion in elevation direction, and when this projector was in this suspension user mode, the 3rd temperature control portion was higher than this second temperature control portion in elevation direction.
As optional technical scheme, this cooling end comprises: ventilation duct, have first air channel, second air channel and the 3rd air channel, and an end of this ventilation duct is arranged near this bulb and towards this bulb; And fan; Be arranged at the other end of this ventilation duct; This fan comprises first fan and second fan; The air-flow that this first fan blows out forms this second air-flow through second air channel, the air-flow that this second fan blows out forms the 3rd air-flow through the 3rd air channel, and this first fan forms this first air-flow with the air-flow that this second fan blows out through first air channel.
As optional technical scheme; This light source module also comprises reflex housing and holder, and this bulb is arranged at the inboard of this reflex housing, and this holder is arranged at the outside of this reflex housing; The perisporium of this holder has air intake vent; This air intake vent comprises first air intake vent and second air intake vent, and the edge of this first air intake vent and this second air intake vent has a plurality of guide vanes, and an end of this ventilation duct is arranged at this air intake vent; This first air channel is corresponding to this first air intake vent; This second air channel and the 3rd air channel are corresponding to this second air intake vent, and this this first air-flow of first air intake vent guiding is to this first temperature control portion, and this second air intake vent this second air-flow of guiding and the 3rd air-flow are respectively to this second temperature control portion and the 3rd temperature control portion.
As optional technical scheme; This light source module also comprises fan control portion; This fan control portion controls the rotating speed of this first fan and this second fan respectively; When this projector was in this horizontal user mode, the rotating speed of this fan control portion this first fan of control was greater than the rotating speed of this second fan; When this projector was in the suspension user mode, the rotating speed of this fan control portion this second fan of control was greater than the rotating speed of this first fan.
As optional technical scheme, the width in this second air channel equals the width in the 3rd air channel, and the width in this first air channel is less than or equal to the width in this second air channel.
As optional technical scheme; This cooling end comprises fan; This fan is arranged near this bulb and towards this bulb, and this fan comprises first fan, second fan and three fan, and this first fan produces this first air-flow; This second fan produces this second air-flow, and this three fan produces the 3rd air-flow.
As optional technical scheme; This light source module also comprises reflex housing and holder, and this bulb is arranged at the inboard of this reflex housing, and this holder is arranged at the outside of this reflex housing; The perisporium of this holder has first air intake vent and second air intake vent; The edge of this first air intake vent and this second air intake vent has a plurality of guide vanes, and this first fan is arranged at this first air intake vent, and this second fan and three fan are arranged side by side in this second air intake vent; This this first air-flow of first air intake vent guiding is to this first temperature control portion, and this second air intake vent this second air-flow of guiding and the 3rd air-flow are respectively to this second temperature control portion and the 3rd temperature control portion.
As optional technical scheme; This light source module also comprises fan control portion; This fan control portion controls the rotating speed of this first fan, this second fan and this three fan respectively; When this projector was in the horizontal user mode, the rotating speed of this fan control portion this second fan of control was greater than the rotating speed of this three fan; When this projector was in the suspension user mode, the rotating speed of this fan control portion this three fan of control was greater than the rotating speed of this second fan.
According to an embodiment, the present invention provides a kind of projector, and it comprises like above-mentioned light source module.
Compared to traditional design; Light source module provided by the invention can cool off the first temperature control portion, the second temperature control portion and the 3rd temperature control portion of bulb simultaneously; And can control the airshed that blow to the second temperature control portion or the 3rd temperature control portion according to the different user mode of projector; The temperature of better balance bulb, the serviceable life of prolongation bulb.
Can further be understood by following description of drawings and embodiment detailed description in advantage of the present invention and spirit.
Description of drawings
Fig. 1 is the schematic perspective view of embodiment of the invention light source module.
Fig. 2 is the cut-open view of Fig. 1.
Fig. 3 is Fig. 1 fan and ventilation duct combination synoptic diagram.
Fig. 4 is the synoptic diagram of embodiment of the invention projector.
Fig. 5 is the synoptic diagram of projector of the present invention two states.
Fig. 6 is the synoptic diagram of air-flow cooling bulb during two states among Fig. 5.
Fig. 7 is the schematic perspective view of embodiment of the invention light source module.
Fig. 8 is the synoptic diagram of air-flow cooling bulb during corresponding to the two states of Fig. 7.
Embodiment
Please be simultaneously with reference to Fig. 1 and Fig. 7, Fig. 1 is the schematic perspective view of embodiment of the invention light source module, Fig. 7 is the schematic perspective view of embodiment of the invention light source module.The present invention provides a kind of light source module; Be applied to projector, this light source module comprises bulb 2, and this bulb 2 comprises first 2a of temperature control portion, second 2b of temperature control portion and the 3rd 2c of temperature control portion; This light source module also comprises cooling end 6; This cooling end 6 forms the first air-flow W1, the second air-flow W2 and the 3rd air-flow W3, wherein, and this first temperature control 2a of portion of this bulb 2 of this first air-flow W1 cooling; This second temperature control 2b of portion of this bulb 2 of this second air-flow W2 cooling, the 3rd 2c of temperature control portion of this bulb 2 of the 3rd air-flow W3 cooling.When this projector was in the horizontal user mode, the airshed of this second air-flow W2 was greater than the airshed of the 3rd air-flow W3; When this projector was in the suspension user mode, the airshed of the 3rd air-flow W3 was greater than the airshed of this second air-flow W2.The so-called horizontal user mode of the present invention promptly is that projector is positioned over platform or table is gone up the state that uses, and so-called suspension user mode promptly is that projector hangs on the state that uses on the ceiling.First 2a of temperature control portion of the present invention is corresponding to the electrode part of this bulb 2, and this second temperature control 2b of portion and the different parts of the 3rd 2c of temperature control portion corresponding to the illuminating part of this bulb 2 are that mercury lamp is an example with bulb 2, and its illuminating part is the spheroidite part.Wherein, when this projector was in this horizontal user mode, this second temperature control 2b of portion was higher than the 3rd 2c of temperature control portion in elevation direction, and when this projector was in this suspension user mode, the 3rd 2c of temperature control portion was higher than this second temperature control 2b of portion in elevation direction.First 2a of temperature control portion of bulb 2, second 2b of temperature control portion and the 3rd 2c of temperature control portion are all crucial temperature control portion.
For further specifying, please be simultaneously with reference to Fig. 1, Fig. 2 and Fig. 3, this embodiment provides a kind of light source module 10, and it comprises bulb 2, fan, ventilation duct 7.Bulb 2 comprises first 2a of temperature control portion, second 2b of temperature control portion and the 3rd 2c of temperature control portion.Ventilation duct 7 has the first air channel 7a, the second air channel 7b and the 3rd air channel 7c, and an end of ventilation duct 7 is arranged near this bulb 2 and towards this bulb 2.Fan is arranged at the other end of ventilation duct 7; Fan comprises the first fan 6a and the second fan 6b; The air-flow that the first fan 6a blows out forms the second air-flow W2 through the second air channel 7b; The air-flow that the second fan 6b blows out forms the 3rd air-flow W3 through the 3rd air channel 7c, and the air-flow that the first fan 6a and the second fan 6b blow out forms the first air-flow W1 through the first air channel 7a.Wherein, first 2a of temperature control portion of first air-flow W1 cooling bulb 2, second 2b of temperature control portion of second air-flow W2 cooling bulb 2, the 3rd 2c of temperature control portion of the 3rd air-flow W3 cooling bulb 2.
As shown in Figure 3; The first fan 6a is arranged at an end of ventilation duct 7 and corresponding to the first air channel 7a and the 7b place, second air channel of ventilation duct 7; The second fan 6b is arranged at an end of ventilation duct 7 and corresponding to the first air channel 7a and the 7c place, the 3rd air channel of ventilation duct 7; It is a1, a2, b1 and b2 that the air-flow that the first fan 6a and the second fan 6b blow out is divided into four parts by ventilation duct 7, and wherein air-flow a1 becomes the second air-flow W2 corresponding to the second air channel 7b, and air-flow b1 becomes the 3rd air-flow W3 corresponding to the 3rd air channel 7c; Air-flow a2 and air-flow b2 are jointly corresponding to the first air channel 7a, and air-flow a2 and air-flow b2 mix in the first air channel 7a also becomes the first air-flow W1 after the rectification.As stated, the effect of ventilation duct 7 is that the air-flow that the first fan 6a and the second fan 6b are produced forms the first stable air-flow W1, the second air-flow W2 and the 3rd air-flow W3 after ventilation duct 7 rectifications.Preferable; The width d2 of the second air channel 7b of ventilation duct 7 of the present invention equals the width d3 of the 3rd air channel 7c; The width d1 of the first air channel 7a is less than or equal to the width d2 of the second air channel 7b; But in practical application, the size of the first air channel 7a, the second air channel 7b and the 3rd air channel 7c can be set according to actual needs, not as limit.
According to another embodiment; Please see figures.1.and.2, light source module 10 of the present invention further comprises reflex housing 1 and holder 3, and bulb 2 is arranged at reflex housing 1 inboard; This holder 3 is arranged at the outside of reflex housing 1; Be used for fixing reflex housing 1, have air intake vent and air outlet 9 on the perisporium of holder 3, the port that optical filter 8 is fixed in holder 3 is used to leach veiling glare.The air intake vent of present embodiment comprises the first air intake vent 4a and the second air intake vent 4b, and the edge of this first air intake vent 4a and this second air intake vent 4b has a plurality of guide vanes 5, and a plurality of guide vanes 5 are directed to cooling draught the different temperature control portion of bulb 2.One end of this ventilation duct 7 is arranged at this air intake vent; This first air channel 7a is corresponding to this first air intake vent 4a; This second air channel 7b and the 3rd air channel 7c are corresponding to this second air intake vent 4b; This first air intake vent 4a is directed to this first temperature control 2a of portion with this first air-flow W1, and this second air intake vent 4b is directed to this second temperature control 2b of portion and the 3rd 2c of temperature control portion respectively with this second air-flow W2 and the 3rd air-flow W3.As stated; The first air-flow W1, the second air-flow W2 and the 3rd air-flow W3 that blow out from ventilation duct 7 blow to bulb 2 through this first air intake vent 4a and this second air intake vent 4b; Wherein, First 2a of temperature control portion of first air-flow W1 cooling bulb 2, second 2b of temperature control portion of second air-flow W2 cooling bulb 2, the 3rd 2c of temperature control portion of the 3rd air-flow W3 cooling bulb 2.
According to another embodiment; Light source module 10 also can comprise fan control portion; Fan control portion controls the rotating speed of the first fan 6a and the second fan 6b respectively; When this projector was in this horizontal user mode, the rotating speed of this first fan of the control 6a of this fan control portion was greater than the rotating speed of this second fan 6b; When this projector was in the suspension user mode, the rotating speed of this second fan of the control 6b of this fan control portion was greater than the rotating speed of this first fan 6a.
Please be simultaneously with reference to Fig. 4, Fig. 5 and Fig. 6, Fig. 4 is the synoptic diagram of embodiment of the invention projector, and Fig. 5 is the synoptic diagram of projector of the present invention two states, and Fig. 6 is the synoptic diagram of air-flow cooling bulb during two states among Fig. 5.This embodiment provides a kind of projector 100, and it comprises shell 13, camera lens 12 and as above-mentioned light source module 10.Light source module 10 emits beam and 11 projects projector 100 through camera lens 12.Please be simultaneously with reference to Fig. 5 and Fig. 6; When being in horizontal user mode A, projector 100 promptly is placed in when using on the platform; Second 2b of temperature control portion of bulb 2 is higher than second 2b of temperature control portion in elevation direction or gravity direction; The temperature of second 2b of temperature control portion of bulb 2 is the highest; Can control the rotating speed of the rotating speed of the first fan 6a greater than the second fan 6b through fan control portion, the airshed of the second air-flow W2 that makes second 2b of temperature control portion that blows to bulb 2 is greater than the airshed of the 3rd air-flow W3 of the 3rd 2c of temperature control portion that blows to bulb 2.When being in suspension user mode B, projector 100 promptly hangs on when using on the ceiling; Reverse in the below of the 3rd 2c of temperature control portion in the position of second 2b of temperature control portion of bulb 2; At this moment; The temperature of the 3rd 2c of temperature control portion is the highest, can control the rotating speed of the rotating speed of the second fan 6b greater than the first fan 6a through fan control portion, makes the airshed of the airshed of the 3rd air-flow W3 that blows to the 3rd 2c of temperature control portion greater than the second air-flow W2 that blows to second 2b of temperature control portion.Projector 100 of the present invention has realized that two fans can cool off first 2a of temperature control portion, second 2b of temperature control portion and the 3rd 2c of temperature control portion of bulb 2 simultaneously; The airshed that can blow to the high temperature control portion of temperature according to the control of different user mode again is greater than the airshed that blows to the low temperature control portion of temperature, better the function of the temperature of balance bulb.
Please with reference to Fig. 7, according to another embodiment of the present invention, a kind of light source module 20 is provided, it comprises bulb 2 and cooling end 6.Bulb 2 comprises first 2a of temperature control portion, second 2b of temperature control portion and the 3rd 2c of temperature control portion.Cooling end 6 comprises fan; Fan is arranged near the bulb 2 and towards bulb 2, and fan comprises the first fan 6a, second fan 6b and the three fan 6c, and the first fan 6a produces the first air-flow W1; The second fan 6b produces the second air-flow W2, and three fan 6c produces the 3rd air-flow W3.Wherein, first 2a of temperature control portion of first air-flow W1 cooling bulb 2, second 2b of temperature control portion of second air-flow W2 cooling bulb 2, the 3rd 2c of temperature control portion of the 3rd air-flow W3 cooling bulb 2.
According to above-mentioned specific embodiment, light source module 20 also can further comprise reflex housing 1 and holder 3, and bulb 2 is arranged at reflex housing 1 inboard, and this holder 3 is arranged at the outside of reflex housing 1, is used for fixing reflex housing 1.The perisporium of this holder 3 has the first air intake vent 4a and the second air intake vent 4b; The edge of this first air intake vent 4a and this second air intake vent 4b has a plurality of guide vanes 5; This first fan 6a is arranged at this first air intake vent 4a; This second fan 6b and three fan 6c are arranged side by side in this second air intake vent 4b; This first air intake vent 4a is directed to this first temperature control 2a of portion with this first air-flow W1, and this second air intake vent 4b is directed to this second temperature control 2a of portion and the 3rd 2c of temperature control portion respectively with this second air-flow W2 and the 3rd air-flow W3.
As optional technical scheme; This light source module 20 also comprises fan control portion; This fan control portion controls the rotating speed of this first fan 6a, this second fan 6b and this three fan 6c respectively; When this projector was in the horizontal user mode, the rotating speed of this second fan of the control 6b of this fan control portion was greater than the rotating speed of this three fan 6c; When this projector was in the suspension user mode, the rotating speed of this three fan 6c of control of this fan control portion was greater than the rotating speed of this second fan 6b.
According to an embodiment, the present invention provides a kind of projector, and it comprises like above-mentioned light source module 20.Please with reference to Fig. 8, Fig. 8 is the synoptic diagram of air-flow cooling bulb during corresponding to the two states of Fig. 7.As shown in Figure 8; When projector is in horizontal user mode A; The temperature of second 2b of temperature control portion of bulb 2 is the highest, and can control the rotating speed maximum of the second fan 6b this moment through fan control portion, makes the airshed maximum of the second air-flow W2 of second 2b of temperature control portion that blows to bulb 2.When projector is in suspension user mode B; Reverse in the below of the 3rd 2c of temperature control portion in the position of second 2b of temperature control portion of bulb 2; At this moment; The temperature of the 3rd 2c of temperature control portion is higher than the temperature of second 2b of temperature control portion, can control the rotating speed of the rotating speed of three fan 6c greater than the second fan 6b through fan control portion, makes the airshed of the airshed of the 3rd air-flow W3 that blows to the 3rd 2c of temperature control portion greater than the second air-flow W2 that blows to second 2b of temperature control portion.
Compared to traditional design; Light source module provided by the invention can cool off the first temperature control portion, the second temperature control portion and the 3rd temperature control portion of bulb simultaneously; And can control the airshed that blow to the second temperature control portion or the 3rd temperature control portion according to the different user mode of projector; The temperature of better balance bulb, the serviceable life of prolongation bulb.
According to the detailed description of above embodiment, hope can be known description characteristic of the present invention and spirit more, and is not to come the present invention is limited with the above-mentioned embodiment that is disclosed.
Claims (5)
1. a light source module is applied to projector, and this light source module comprises bulb, and this bulb comprises the first temperature control portion, the second temperature control portion and the 3rd temperature control portion, it is characterized in that, this light source module also comprises:
Cooling end, this cooling end form first air-flow, second air-flow and the 3rd air-flow, and this cooling end comprises:
Ventilation duct has first air channel, second air channel and the 3rd air channel, and an end of this ventilation duct is arranged near this bulb and towards this bulb; And
Fan; Be arranged at the other end of this ventilation duct; This fan comprises first fan and second fan; The air-flow in warp second air channel that this first fan blows out forms this second air-flow, and the air-flow in warp the 3rd air channel that this second fan blows out forms the 3rd air-flow, and this first fan forms this first air-flow with the air-flow in warp first air channel that this second fan blows out;
Wherein, this first temperature control portion is corresponding to the electrode part of this bulb, and this second temperature control portion and the 3rd temperature control portion are corresponding to the different parts of the illuminating part of this bulb; Wherein, When this projector was in this horizontal user mode, this second temperature control portion was higher than the 3rd temperature control portion in elevation direction, when this projector is in this suspension user mode; The 3rd temperature control portion is higher than this second temperature control portion in elevation direction; This first temperature control portion of this this bulb of first air-flow cooling, this second temperature control portion of this this bulb of second air-flow cooling, the 3rd temperature control portion of this bulb of the 3rd air-flow cooling; When this projector was in the horizontal user mode, the airshed of this second air-flow was greater than the airshed of the 3rd air-flow; When this projector was in the suspension user mode, the airshed of the 3rd air-flow was greater than the airshed of this second air-flow.
2. light source module according to claim 1; It is characterized in that: this light source module also comprises reflex housing and holder, and this bulb is arranged at the inboard of this reflex housing, and this holder is arranged at the outside of this reflex housing; The perisporium of this holder has air intake vent; This air intake vent comprises first air intake vent and second air intake vent, and the edge of this first air intake vent and this second air intake vent has a plurality of guide vanes, and an end of this ventilation duct is arranged at this air intake vent; This first air channel is corresponding to this first air intake vent; This second air channel and the 3rd air channel are corresponding to this second air intake vent, and this this first air-flow of first air intake vent guiding is to this first temperature control portion, and this second air intake vent this second air-flow of guiding and the 3rd air-flow are respectively to this second temperature control portion and the 3rd temperature control portion.
3. light source module according to claim 1; It is characterized in that: this light source module also comprises fan control portion; This fan control portion controls the rotating speed of this first fan and this second fan respectively; When this projector was in this horizontal user mode, the rotating speed of this fan control portion this first fan of control was greater than the rotating speed of this second fan; When this projector was in the suspension user mode, the rotating speed of this fan control portion this second fan of control was greater than the rotating speed of this first fan.
4. light source module according to claim 1 is characterized in that: the width in this second air channel equals the width in the 3rd air channel, and the width in this first air channel is less than or equal to the width in this second air channel.
5. a projector is characterized in that, comprises: like the described light source module of any claim in the claim 1 to 4.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010102554668A CN101963746B (en) | 2010-08-10 | 2010-08-10 | Light source module and projector |
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| CN2010102554668A CN101963746B (en) | 2010-08-10 | 2010-08-10 | Light source module and projector |
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| CN101963746B true CN101963746B (en) | 2012-09-19 |
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| CN105090837B (en) * | 2015-09-14 | 2017-12-26 | 广州市浩洋电子股份有限公司 | A kind of stage lighting with cooling gas flow control system |
| CN105841117A (en) * | 2016-05-30 | 2016-08-10 | 广州彩熠灯光有限公司 | Heat dissipation device for lamp bulb of stage lamp |
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| JPH06338212A (en) * | 1993-05-31 | 1994-12-06 | Iwasaki Electric Co Ltd | Cooling method and cooler for small-sized metal halide lamp |
| JP4273912B2 (en) * | 2003-10-07 | 2009-06-03 | ウシオ電機株式会社 | Light source device |
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| JP2002298639A (en) * | 2001-03-29 | 2002-10-11 | Mitsubishi Electric Corp | Light source device and projection display device |
| JP2004191518A (en) * | 2002-12-09 | 2004-07-08 | Nec Viewtechnology Ltd | Light source cooling method of projector, and projector |
| JP2005024735A (en) * | 2003-06-30 | 2005-01-27 | Toshiba Corp | Light source device |
| CN1645249A (en) * | 2004-01-23 | 2005-07-27 | 株式会社日立制作所 | Light source and projector having an image display element |
| CN1928708A (en) * | 2005-09-09 | 2007-03-14 | 三洋电机株式会社 | Projector device |
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| CN101963746A (en) | 2011-02-02 |
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