CN102929081B - Projection type display device - Google Patents
Projection type display device Download PDFInfo
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- CN102929081B CN102929081B CN201210447245.XA CN201210447245A CN102929081B CN 102929081 B CN102929081 B CN 102929081B CN 201210447245 A CN201210447245 A CN 201210447245A CN 102929081 B CN102929081 B CN 102929081B
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Abstract
The invention provides a projection type display device which is light in weight, small in size, low in power consumption, low in noise and price. The display device comprises a solid light source array, a reflector device and a projection unit, wherein the solid light source array is formed through solid light sources which emit lights, the reflector device is emitted by the lights emitted by the solid light source array and performs time modulation on the incident lights, the projection unit projects the lights after the time modulation, the solid light sources emit colored lights, and the solid light source array contains solid light sources with different colored lights.
Description
The application is the applying date is on February 6th, 2005, application number is 201010232196.9, and denomination of invention is the divisional application of the application for a patent for invention (divisional application of the application for a patent for invention that this application for a patent for invention is application number is 200510007281.4, the applying date, to be February 6, denomination of invention in 2005 be " projection display device and control method and control program " thereof) of " projection display device ".
Technical field
The present invention relates to a kind of projection display device.
Background technology
[patent documentation 1] JP 2003-186110 publication
[non-patent literature 1] " day Longitude エ レ Network ト ロ ニ Network ス ", on November 24th, 2003, p.114.
At present, as optical modulation device, except liquid crystal indicator (LCD), such as it is also known that: the projection display device (Projector) using the reflector apparatus such as DMD (Digital Micromirror Device, registered trademark) element of TI (Texas Instruments) company etc.
As the light source of this projection display device, the high-pressure mercury-vapor lamp of usual use injection white light, by using colour wheel, emitted white light is separated into R, G, B look at time-axis direction, and use the usable reflection time of each micro-reflector of DMD element to colors for further adjustments, form projected image (for example, referring to non-patent literature 1).
But when using the thermal light source of generation heat as described above as lighting source, thermal light source Problems existing is: the conversion efficiency inputted electric power being converted to light reduces, and input voltage is high, and power consumption increases.Further, also there is following problem in thermal light source: the size of power supply and lamp is large, and projection display device becomes large, and must have the good cooling fan of efficiency for making thermal light source cool, and the noise that the driving sound because of cooling fan causes becomes greatly.
In patent documentation 1, in order to solve the problem, disclose a kind of technology, the light emitting diode (LED) of this technology use injection R (red), G (green), B (indigo plant) each coloured light is as light source.Reflected by colour splitting prism from each coloured light of LED injection, be imported into DMD element.
But in the method, Problems existing is: even in order to make from each coloured light of LED injection, need colour splitting prism, cost uprises, and projection display device becomes large.
Summary of the invention
The present invention proposes to solve above-mentioned problem, the object of this invention is to provide can realize that light weight is small-sized, low power consumption, low noise, and the projection display device of low price can be realized.
In order to achieve the above object, the invention provides a kind of projection display device, it is characterized in that, described projection display device has: solid light source array, and it is arranged by the solid light source of injection light; Reflector apparatus, it, by controlling the injection direction from the light of described solid light source array incidence, carries out time-modulation to the light of described incidence; And projecting cell, the light after its described time-modulation that projects, described solid light source penetrates a kind of coloured light, and described solid light source array is carried out arranging by the solid light source of injection different color light.
In addition, the present invention also provides a kind of projection display device, it is characterized in that, described projection display device has: solid light source array, and it is carried out arranging by the solid light source of injection light; Reflector apparatus, it, by controlling the injection direction from the light of described solid light source array incidence, carries out time-modulation to the light of described incidence; And projecting cell, the light after its described time-modulation that projects; Described reflector apparatus is undertaken arranging by the micro-reflector for reflecting the incident light and is formed, and be configured to the micro-reflector corresponding with image pixel is arranged in a matrix, described light source is configured to, from being transfused to the time of the timing signal making described micro-reflector connect after a predetermined time after bright light.
In addition, the present invention also provides a kind of projection display device, it is characterized in that, described projection display device has: solid light source array, and it is carried out arranging by the solid light source of injection light; Reflector apparatus, it, by controlling the injection direction from the light of described solid light source array incidence, carries out time-modulation to the light of described incidence; And projecting cell, the light after its described time-modulation that projects; Described reflector apparatus is undertaken arranging by the micro-reflector for reflecting the incident light and is formed, and be configured to the micro-reflector corresponding with image pixel is arranged in a matrix, described light source is configured to, and all turns off the light when being transfused to the timing signal making described micro-reflector disconnect.
In addition, the present invention also provides a kind of projection display device, it is characterized in that, described projection display device has: solid light source array, and it is carried out arranging by the solid light source of injection light; Reflector apparatus, it, by controlling the injection direction from the light of described solid light source array incidence, carries out time-modulation to the light of described incidence; And projecting cell, the light after its described time-modulation that projects; Described reflector apparatus is driven by modulator control signal, and this modulator control signal is corrected into the white become when having carried out time integral to the light modulated of the RGB from each micro-reflector as target.
Accompanying drawing explanation
Fig. 1 is the skeleton diagram of projection display device according to the embodiment of the present invention.
Fig. 2 is the plan view of the outline of the lighting device illustrated according to the embodiment of the present invention.
Fig. 3 is the figure be described the time-modulation of reflector apparatus according to the embodiment of the present invention.
Fig. 4 is the figure be described the time-modulation of reflector apparatus according to the embodiment of the present invention and LED.
Fig. 5 is the block scheme of the formation of the driving circuit that projection display device is shown.
Fig. 6 is the skeleton diagram of the projection display device according to another embodiment of the present invention.
Fig. 7 is the skeleton diagram of the projection display device according to another embodiment of the present invention.
Fig. 8 is the skeleton diagram of the projection display device according to another embodiment of the present invention.
Fig. 9 is the skeleton diagram of the projection display device according to another embodiment of the present invention.
[symbol description]
1 ... lighting device (solid light source array); 10r, 10g, 10b ... LED (solid light source); 30 ... reflector apparatus; 40 ... measuring element (determination unit); 45 ... absorber; 50 ... prism; 51,51a ... reflecting plate (light element); 70 ... projecting lens (projecting cell)
Embodiment
Below, referring to figs. 1 through Fig. 5, projection display device according to the embodiment of the present invention and control method thereof and its control program are described.
First, with reference to Fig. 1, the projection display device according to an embodiment of the invention is described.The projection display device of present embodiment uses reflector apparatus to carry out to the R penetrated from LED array (red), G (green), B (indigo plant) different color light the projective color display device that time-modulation carrys out color display.
Fig. 1 is the figure of the outline of the projection display device illustrated according to the present embodiment.
Projection display device, as shown in Figure 1, is roughly formed by with lower part: lighting device (solid light source array) 1, the different color light of its injection R, G, B; Reflector apparatus 30, it carries out time-modulation to each coloured light; Measuring element (determination unit) 40, it measures the intensity of the light penetrated from reflector apparatus 30; And projecting lens (projecting cell) 70, its projection is by the light modulated after time-modulation.
Fig. 2 is the plan view of the outline that lighting device is shown.
As shown in Figure 2, lighting device 1 is configured to the LED penetrating R, G, B coloured light respectively (solid light source) 10r, 10g, 10b to carry out the LED array of planar configuration.More particularly, in lighting device 1, LED10r, 10g, 10b form the row by this order repeated arrangement at longitudinal direction, and these row are formed multiple to transverse direction arrangement.Further, be in staggered configuration to longitudinal direction with the half of LED configuration space between laterally adjacent row, make LED10r, 10g, 10b compact configuration.And, the LED of the identical coloured light of injection is configured to non-conterminous.
Further, in order to each coloured light penetrated from lighting device 1 being pooled to the reflector apparatus 30 as illuminated object, collector lens 21 is configured with at the light emitting side of lighting device 1.And be configured with relay lens 22 at the light emitting side of lighting device 1 equally, this relay lens 22 is directed to reflector apparatus 30 each coloured light penetrated from lighting device 1.
In addition, as mentioned above, both collector lens 21 and relay lens 22 can be configured between lighting device 1 and reflector apparatus 30, and, also can add the integration lens that configuration makes the Illumination Distribution of each coloured light penetrated from lighting device 1 uniform such as fly lens and rod lens such.
Reflector apparatus 30 is configured to the micro-reflector corresponding with image pixel is arranged in a matrix, and can change the direction (can shake the head) of the reflecting surface of micro-reflector.Further, by according to having carried out the signal of video signal of signal transacting, controlled the injection direction of incident each coloured light, between during assorted light, be modulated into the invalid light wanted the light modulated of Projection Display He will absorb, can the ratio of light modulated controlled from 0% to 100%.
Absorber 45 is configured to absorb the invalid light penetrated from reflector apparatus 30, and can carry out replacing with measuring element 40 described later and configure.
The path of the light modulated between reflector apparatus 30 and projecting lens 70 is configured with prism 50, this prism 50 is directed to projecting lens 70 the light penetrated from reflector apparatus 30.Prism 50 adopts the structure of being pasted by triangular prism, and within it face is the mirror surface that diagonal angle wire is formed with reflection modulation light.Further, opposed with the mirror surface of prism 50 and the face adjoined with the face of light modulated incidence is configured with the reflecting plate (light element) 51 of reflection modulation light.
Measuring element 40 can carry out replacing with aforesaid absorber 45 and configure, and is configured to measure the intensity of the invalid light from reflector apparatus 30.Further, measuring element 40 is formed by such as the optical sensor of CCD (Charge Coupled Device: charge-coupled device (CCD)), CMOS etc. being configured to rectangular parts.
The light modulated amplification that projecting lens 70 is configured to make to penetrate from prism 50 projects to projection screen 71.
Below, the effect of projection display device in image projection of above-mentioned formation is described.
First, when projected image, as shown in Figure 1, absorber 45 is configured, makes absorber 45 absorb invalid light from reflector apparatus 30.
Then, as depicted in figs. 1 and 2, LED10r, 10g, 10b of lighting device 1 distinguish timesharing bright light for the coloured light of RGB.Incided reflector apparatus 30 from each coloured light of lighting device 1 timesharing injection by collector lens 21 and relay lens 22.
Incide each coloured light on reflector apparatus 30 according to the signal of video signal being input to projection display device, carry out time-modulation respectively for each micro-reflector, light modulated reflects to prism 50, and invalid light reflects to absorber 45.
The light modulated penetrated from reflector apparatus 30 incides prism 50, is reflected, incide on reflecting plate 51, and reflect to projecting lens 70 by the mirror surface in prism 50.
Light to the reflection of projecting lens 70 direction incides on projecting lens 70, and amplification projects on projection screen 71.
Herein, the method light modulated of 1 of reflector apparatus 30 micro-reflector being modulated into temporally prescribed strength is described.
Fig. 3 (a) is the figure inciding the intensity of each coloured light on micro-reflector illustrated when making LED bright light certain hour.Fig. 3 (b) is the figure of the intensity of the light modulated of the micro-reflector illustrated in regulation frame.
When making LED10r, 10g, 10b bright light certain hour, as shown in Fig. 3 (a), each coloured light of RGB incides on the micro-reflector of reflector apparatus 30 with respective intensity.The strength balance performance white of each coloured light of the RGB under this state.According to this state, the strength balance of each for RGB coloured light is changed into the strength balance of each coloured light of RGB such as shown in Fig. 3 (b), show regulation look.
Fig. 4 illustrates that the bright light of LED controls the concept map of the time controling timing of timing and micro-reflector.
The method that the strength balance being carried out each coloured light of above-mentioned RGB by time-modulation is changed is specifically described.
First, the timing signal (ON) of input micro-reflector, drives reflector apparatus, the reflected light of the micro-reflector corresponding with color lights R is incided on prism 50.Now, micro-reflector is driven while incoming timing signal, and the angle 1 incided absorber 45 from reflected light becomes reflected light and incides angle 2 on prism 50.The angle of micro-reflector becomes from the angle 1 that reflected light incides absorber 45 angle 2 incided on prism 50 needs the time, and this time is set as catoptron rotational time Tr.
The LED10r of injection color lights R is after incoming timing signal, and at catoptron rotational time Tr through bright light later, this state is kept the stipulated time.
Then, in the stipulated time through later, timing signal disconnects, and like this, LED10r turns off the light, and the direction of micro-reflector is driven, and makes the reflected light angle incided on absorber 45 be angle 1.The drived control of the micro-reflector of this reflector apparatus 30 can carry out according to the order of magnitude of about 5000Hz.
Also carry out above control to remaining coloured light G and coloured light B, the strength balance carrying out each coloured light of RGB changes.
Below, the driving method of the projection display device of present embodiment is described.
Fig. 5 is the block scheme of the formation of the driving circuit of the projection display device illustrated in present embodiment.
First, the adquisitiones of the correction parameter of prescribed strength is become to be described the intensity correction of the light modulated penetrated from reflector apparatus 30 to use measuring element 40.
First, as shown in Figure 1, configuration measuring element 40 replaces absorber 45, and the invalid light from reflector apparatus 30 is incided on measuring element 40.
Then, as shown in Figure 5, control part 82 couples of LED10r, 10g, 10b control, and make every coloured light with constant voltage bright light certain hour.Then, control part 82 controls, and makes the invalid light of the regulation micro-reflector of reflector apparatus 30 incide certain hour on measuring element 40.Like this by controlling, the correction parameter of each micro-reflector can be obtained.
Measuring element 40 outputs to reflector apparatus reflected light determination part 41 the signal corresponding with the intensity of incident invalid light, and reflector apparatus reflected light determination part 41 calculates the intensity of light modulated according to the intensity of invalid light.
The intensity of each coloured light and each micro-reflector all being carried out to above-mentioned light modulated calculates.
The intensity of the light modulated adopting said method to obtain is input to control part 82.Control part 82 is according to the intensity of light modulated, the correction parameter that the usable reflection time for the micro-reflector to each coloured light that calculates controls, making when having carried out time integral to the light modulated of the RGB from each micro-reflector, becoming the white (such as color temperature is 8300 ° of K) as target.
Then, the correction parameter of calculated each micro-reflector is outputted to correction parameter storage part 83, and is stored in correction parameter storage part 83.
Below, the method for projection display device and control program is driven to be described to according to signal of video signal.
In the present embodiment, as shown in Figure 5, such as the signal of video signal as simulating signal exported from PC, DVD, TV antenna is input to A/D converter section 81, converts thereof into digital signal, and be input to control part 82.
In addition, when the signal of video signal being input to projection display device is digital signal, does not need the A/D converter section 81 simulating signal being converted to digital signal, digital signal can be directly inputted to control part 82.And, when the signal of video signal being input to projection display device is the packed datas such as such as MPEG2, both the lsb decoder that carried out by packed data decoding can have been had to replace A/D converter section 81, compressed signal is input to lsb decoder, also control part 82 can be made to have decoding function, compressed signal is input to control part 82.
In control part 82, according to the signal of video signal converting digital signal to and the correction parameter be stored in correction parameter storage part 83, generate the modulator control signal to reflector apparatus 30.Generated modulator control signal is outputted to reflector apparatus driver 29, and reflector apparatus driver 29, according to modulator control signal, carries out drived control to each micro-reflector of reflector apparatus 30.
Further, at control part 82, meanwhile, according to the signal of video signal converting digital signal to and the correction parameter be stored in correction parameter storage part 83, generate and the bright light of LED10r, 10g, 10b is turned off the light the light source control signal controlled.Generated light source control signal is outputted to LED power control part 84, and LED power control part 84, by LED driver 85, is turned off the light to the bright light of each LED10r, 10g, 10b and is controlled.
In addition, this correction parameter obtain both can manufacture and dispatch from the factory this projection display device time only carry out once, also after dispatching from the factory, regularly can obtain correction parameter.
Only obtaining the method for a correction parameter when dispatching from the factory, owing to not using measuring element 40 after dispatching from the factory, thus can take off measuring element 40, easily realize light weight miniaturization and the low price of projection type display element.
After dispatching from the factory, also regularly obtain the method for correction parameter, the change etc. of the aging colour balance caused because of LED10r, 10g, 10b and reflector apparatus 30 can be tackled, easily maintain the high-quality image put.
In addition, as mentioned above, both measuring element 40 and absorber 45 removably can be configured, also measuring element 40 can be also used as absorber 45.According to this formation, due to when just at projected image, measuring element 40 also can be used to measure the intensity of invalid light, thus always can prevent picture element from declining.Further, owing to not needing that there is measuring element 40 and absorber 45 respectively, be thus favourable to the light weight miniaturization realizing projection display device.
According to above-mentioned formation, owing to using LED10r, 10g, 10b as light source, thus compared with above-mentioned high-pressure mercury-vapor lamp, the efficiency input electric power being converted to light is high, when obtaining same brightness, input electric power (power reducing) can be reduced, because thermal value is also few, thus can prevent the noise (low noise) of cooling fan etc.Further, because LED10r, 10g, 10b self is more small-sized than high-pressure mercury-vapor lamp light weight, the circuit of driving LED 10r, 10g, 10b also can use the circuit more small-sized than the driving circuit of high-pressure mercury-vapor lamp.And, due to these advantages, with use high-pressure mercury-vapor lamp as compared with light source, use LED10r, 10g, 10b to be favourable as light source to the low price realizing projection display device.
Be used as LED array use owing to LED10r, 10g, 10b to be carried out arrangement, the light thus with uniform illuminance incides on the face of the reflector apparatus 30 of the illuminated object as light source.Therefore, not needing to have colour splitting prism as above-mentioned patent documentation 1, is favourable to light weight miniaturization, the low price realizing projection display device.
And, due to LED10r, 10g, 10b of each coloured light of injection RGB are carried out arrangement to form LED array, thus not needing to have the colour splitting prism of synthesis different color light, just can form coloured image, is favourable to light weight miniaturization, the low price realizing projection display device.
The intensity of the injection light from reflector apparatus 30 can be controlled respectively for each micro-reflector.Therefore, such as, owing to the injection light intensity of each coloured light from reflector apparatus 30 can be controlled to prescribed strength, thus the colour balance of projected image can be controlled to regulation balance.Further, the impact of the external factor of light source ages etc. can not be subject to, the image of regulation brightness can be shown.
When using measuring element 40 to measure the injection light intensity from reflector apparatus 30, by making measuring element 40 and absorber 45 carry out replacing configuration, the intensity of invalid light can be measured.
Because light modulated and invalid light existence 1 are to the relation of 1, thus can obtain the correction parameter of light modulated according to the intensity of the invalid light do not incided on projecting lens 70, the strength control of the light modulated incided on projecting lens 70 can be become prescribed strength.
And, owing to measuring the intensity of invalid light, thus when just at projected image, also can measure the intensity of invalid light, therefore always can prevent picture element from declining.Further, when not measuring invalid light intensity, owing to always making absorber absorb invalid light, thus can prevent measuring element 40 from deterioration occurring.
In addition, measuring element 40, as mentioned above, both can change with absorber 45 and configure, also as shown in Figure 6, can change configure with reflecting plate 51.According to this formation, measuring element 40 can be used directly to measure modulate light intensity, modulate light intensity accurately can be measured.Therefore, can easily obtain correction parameter accurately, modulate light intensity can be controlled to prescribed strength exactly.Further, when not measuring modulate light intensity, carrying out replacing due to measuring element 40 and original reflecting plate 51 can be made and configuring, thus can prevent measuring element 40 from because of the light of incidence, deterioration occurring.
Further, as shown in Figure 7, measuring element 40 can be configured to can insert or leave the modulation light path between reflector apparatus 30 and prism 50.According to this formation, when not using measuring element 40 to measure injection light intensity, measuring element 40 can be made to leave the path of light modulated, bring impact can not to projected image, can prevent picture element from declining.Further, when measuring modulate light intensity, because the path of measuring element 40 being inserted light modulated measures, thus directly can measure light modulated, modulate light intensity accurately can be measured.Therefore, correction parameter accurately can be easily obtained, the intensity of light modulated prescribed strength can be controlled to exactly.
Further, as shown in Figure 8, reflecting plate be have make a few percent of incident light modulated through permeability reflecting plate 51a, measuring element 4 also can be configured to measure the light modulated through reflecting plate 51a.According to this formation, because determination unit measures injection light (light modulated) intensity through reflecting plate, thus determination unit brings impact can not to projected image, can prevent picture element from declining.Further, due to when just at projected image, determination unit also can be used to measure injection light intensity, thus always can prevent picture element from declining.
Further, as shown in Figure 9, the brightness of measuring element 40 to the image projected on projection screen 71 also can be used to measure.According to this formation, owing to not needing that measuring element 40 is arranged in projection display device, the light weight miniaturization of projection display device thus can be realized.
In addition, technical scope of the present invention is not limited to above-mentioned embodiment, can apply various change in the scope not deviating from main idea of the present invention.
Such as, in the above-described embodiment, use the LED array of the coloured light of injection RGB to be described as the formation of light source to being applicable to, but be not limited to the LED array penetrating different color light, be applicable to and there are the formation of colour wheel etc. and other various formations in the LED array of injection white light.
And, in the above-described embodiment, be described the formation being applicable to use measuring element 40 to calculate correction parameter, but be not limited to the formation using this measuring element 40, being applicable to viewer can according to the formation of hobby input correction parameter etc. and other various formation.
Claims (5)
1. a projection display device, is characterized in that, described projection display device has:
Solid light source array, it is carried out arranging by the solid light source of injection light;
Reflector apparatus, it, by controlling the injection direction from the light of described solid light source array incidence, carries out time-modulation to the light of described incidence;
Projecting cell, the light after its described time-modulation that projects;
Reflecting plate, it carries out transmission to a part for the light after the described time-modulation of incidence;
Determination unit, it is configured to measure through the light after the described time-modulation of described reflecting plate; And
Control part, the intensity of its light measured according to described determination unit, controls described projection display device,
Described reflector apparatus is undertaken arranging by the micro-reflector for reflecting the incident light and is formed, and is configured to the micro-reflector corresponding with image pixel is arranged in a matrix,
Described light source is configured to, from being transfused to the time of the timing signal making described micro-reflector connect after a predetermined time after bright light,
Described reflector apparatus is driven by modulator control signal, and this modulator control signal is corrected into the white become when having carried out time integral to the light modulated of the RGB from each micro-reflector as target.
2. projection display device according to claim 1, is characterized in that,
Described light source is configured to, and all turns off the light when being transfused to the timing signal making described micro-reflector disconnect.
3. a projection display device, is characterized in that, described projection display device has:
Solid light source array, it is carried out arranging by the solid light source of injection light;
Reflector apparatus, it, by controlling the injection direction from the light of described solid light source array incidence, carries out time-modulation to the light of described incidence;
Projecting cell, the light after its described time-modulation that projects;
Reflecting plate, it carries out transmission to a part for the light after the described time-modulation of incidence;
Determination unit, it is configured to measure through the light after the described time-modulation of described reflecting plate; And
Control part, the intensity of its light measured according to described determination unit, controls described projection display device,
Described reflector apparatus is undertaken arranging by the micro-reflector for reflecting the incident light and is formed, and is configured to the micro-reflector corresponding with image pixel is arranged in a matrix,
Described light source is configured to, and all turns off the light when being transfused to the timing signal making described micro-reflector disconnect,
Described reflector apparatus is driven by modulator control signal, and this modulator control signal is corrected into the white become when having carried out time integral to the light modulated of the RGB from each micro-reflector as target.
4. a projection display device, is characterized in that, described projection display device has:
Solid light source array, it is carried out arranging by the solid light source of injection light;
Reflector apparatus, it, by controlling the injection direction from the light of described solid light source array incidence, carries out time-modulation to the light of described incidence; And
Projecting cell, the light after its described time-modulation that projects;
Reflecting plate, it carries out transmission to a part for the light after the described time-modulation of incidence;
Determination unit, it is configured to measure through the light after the described time-modulation of described reflecting plate; And
Control part, the intensity of its light measured according to described determination unit, described projection display device is controlled, described reflector apparatus is driven by modulator control signal, and this modulator control signal is corrected into the white become when having carried out time integral to the light modulated of the RGB from each micro-reflector as target.
5. projection display device according to claim 4, is characterized in that,
Described projection display device has control part and stores the storage part of correction parameter, described control part, according to the signal of video signal converting digital signal to and the described correction parameter be stored in described storage part, generates the modulated drive signal driving described reflector apparatus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210447245.XA CN102929081B (en) | 2005-02-06 | 2005-02-06 | Projection type display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210447245.XA CN102929081B (en) | 2005-02-06 | 2005-02-06 | Projection type display device |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200510007281 Division CN1815348B (en) | 2005-02-06 | 2005-02-06 | Projection-type displaying device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102929081A CN102929081A (en) | 2013-02-13 |
| CN102929081B true CN102929081B (en) | 2015-06-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210447245.XA Active CN102929081B (en) | 2005-02-06 | 2005-02-06 | Projection type display device |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10333599A (en) * | 1997-05-28 | 1998-12-18 | Fuji Xerox Co Ltd | Projector device |
| JPH1132278A (en) * | 1997-07-10 | 1999-02-02 | Fuji Xerox Co Ltd | Projecting device |
| JP2004302357A (en) * | 2003-04-01 | 2004-10-28 | Nec Viewtechnology Ltd | Light source device of projection display device |
-
2005
- 2005-02-06 CN CN201210447245.XA patent/CN102929081B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10333599A (en) * | 1997-05-28 | 1998-12-18 | Fuji Xerox Co Ltd | Projector device |
| JPH1132278A (en) * | 1997-07-10 | 1999-02-02 | Fuji Xerox Co Ltd | Projecting device |
| JP2004302357A (en) * | 2003-04-01 | 2004-10-28 | Nec Viewtechnology Ltd | Light source device of projection display device |
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| Publication number | Publication date |
|---|---|
| CN102929081A (en) | 2013-02-13 |
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