CN104102082A - LED projector and light source device thereof - Google Patents
LED projector and light source device thereof Download PDFInfo
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- CN104102082A CN104102082A CN201410373039.8A CN201410373039A CN104102082A CN 104102082 A CN104102082 A CN 104102082A CN 201410373039 A CN201410373039 A CN 201410373039A CN 104102082 A CN104102082 A CN 104102082A
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Abstract
The invention relates to an LED projector and a light source device thereof. The light source device comprises a blue LED light source, a red LED light source, a green LED light source and a lens group arranged in front of each light source, wherein the surface of the green LED light source is provided with green fluorescent powder; a second blue LED light source and the lens groups are arranged opposite to the green LED light source; a spectroscope B is arranged between the green LED light source and the second blue LED light source; the blue light emitted by the second blue LED light source focuses on the green LED light source by penetrating through the spectroscope B. According to the LED projector and the light source device thereof, luminous flux outputted by the green LED is nearly doubled without increasing light-emitting area, the luminous outputted by the whole machine is doubled after white balance light distribution of red light and blue light is performed again, so that limitation of the LED projector caused by low luminance is solved to a certain degree, and thereby range of application is wider.
Description
Technical field
The invention belongs to projection display technique field, be specifically related to a kind of LED projector and light supply apparatus thereof.
Background technology
In recent years, people attempt to substitute original gas lamp with novel solid light sources such as LED, welcome another the new brilliant period in projection development history.Fig. 1 is current basic structure and the principle of the DLP projection machine optical system of LED light source on the market, red, green, blue three LEDs, luminous by certain sequential and dutycycle separately, green, blue through spectroscope A(transmission, reflect red) and B(transmission indigo plant, reflect green) close after light, rear end integrating system (generally also claim equal photosystem, common are two kinds of forms of optical wand and fly's-eye lens) is thrown light on.Taking blue group as example, light source is converged to quasi-parallel light by " LED collects lens system ", sees through spectroscope A and B, enters " integrating system ".Integrating system can be by after incident beam shaping homogenising, and the incident ray of projector's imaging system is done in output, has so just formed complete projecting illumination system.
But absolutely mostly the projection products market manifestation of new light sources is bad, the factor of most critical be solid light source energy density too low due to.The most important index of projector is output brightness aspect, is the technical bottleneck that solid light source is applied to projector always.Be difficult to reach gas lamp (glass bulb blowing machine) level because LED energy density is too low, can be strengthened because of light source luminescent area is proportional and strengthen light-source brightness, in optical system, the area that light source can strengthen is limited.The output brightness of any projector, is not that how high want to do many higher positions, most critical be that optical system exists a restriction to output brightness, Here it is " integrating system " can be by the angle limits of light.
" integrating system " can be by the angle limits of light: establishing this limited angular is α, if the divergence of beam angle β after light source converges is greater than α, the part that is greater than α will become spurious rays and cannot project away, the part that is only less than α is just available, so converging rear divergence of beam angle beta, light source all can be less than α, otherwise just there is waste, do not reach due efficiency; Also be conditional and integrating system allows the light beam aperture passing through, as the aperture ψ of Fig. 3.The basic parameter of integrating system, depends on the requirement of rear end imaging system (light valve and camera lens), and integrating system determines the parameter of front end light source.
In the situation that " gatherer lens group " is fixing, if efficiently utilizing the light beam aperture that light source forms is just ψ (realizing efficient utilization by optical design), so as shown in Figure 3, emergent ray angle beta is just determined by the numerical aperture S of light source: S more β is larger, because β is limited, so S is also by corresponding strict restriction, and the brightness of existing LED wafer, there is direct relation (in the situation that heat radiation is good with light source area S, output light flux and chip area approach and are directly proportional), so light-source brightness has also just been limited.(note: the LED light source of general projector, light-emitting area is rectangle, the light-emitting area length and width product that S is wafer).
Because the area of light source is limited, the brightness in rgb light source is also just limited, the meaning is the light source that can only select in certain light-emitting area, continue to improve light source area, to promote light source total light flux, projector's output brightness can't increase, and in the situation that light source is certain, projector's output brightness is just difficult to larger lifting.
Summary of the invention
For aforesaid deficiency, the object of this invention is to provide a kind of output brightness and obtain the LED projector and the light supply apparatus thereof that greatly promote.
The electro-optical efficiency having reached in conjunction with current LED wafer, due to the proportioning of white balance, the ratio that in RGB light source, green glow accounts for total light flux generally exceedes 70%, and red and blue LED just must reduce output light flux (reducing power) to be made for coordinating white balance demand.When one timing of green luminous flux, often red and blue luminous flux has very large surplus capacity.Become so promote green glow brightness the key that promotes projector's brightness.
The LED light source device of projector provided by the invention, comprises blue-ray LED light source, red-light LED light source, green light LED light source and is positioned at the lens combination of each light source front end, there is green light fluorescent powder on described green light LED light source surface; On described green light LED light source opposite, the second blue-ray LED light source and lens combination is set, between green light LED light source and the second blue-ray LED light source, spectroscope B is set; The blue light of described the second blue-ray LED light source transmitting sees through spectroscope B, focuses on green light LED light source.
Described green light LED light source and the second blue-ray LED light source are just right, the lens combination optical axis coincidence of both front ends.
Described spectroscope B transmit blue, reflect green light.
Described blue-ray LED light source is arranged on a side of spectroscope B, spectroscope A is set before described red-light LED light source.
The green glow of described green light LED light source self transmitting, the green glow stack with green light LED light source excites through the blue light illumination of the second blue-ray LED light source transmitting, through spectroscope B reflection, enters integrating system through Multiplexing apparatus.The blue light of described blue-ray LED light source transmitting sees through spectroscope B and spectroscope A, enters integrating system through Multiplexing apparatus; The ruddiness of described red-light LED light source transmitting reflects through spectroscope A, then enters integrating system through Multiplexing apparatus.
The present invention also provides a kind of LED projector, comprises above-mentioned LED light source device, can be DLP projector, can also be applied to LCD or LCOS projector.
The present invention is at traditional 3LED(R+G+B) on light-source system, ingenious introducing the 4th LEDs is as secondary souce, this LED is blue-ray LED, irradiate the fluorescent powder of original green LED, make green LED in the situation that not increasing light-emitting area (numerical aperture), output light flux promotes and approaches one times, again R, B is carried out to white balance luminous intensity distribution, and complete machine output brightness promotes at double.
Specifically, the present invention has following beneficial effect:
(1) brightness of solid light source projector output is significantly improved, has to a certain degree solved LED light source projector because of the lower limitation of bringing of brightness, range of application is wider.
(2) it is upper that the present invention is applied in DLP, can in light path, cancel colour wheel this for the very weak link of performance, and then significantly promote projector's performance.
(3) because the reduction of camera lens F number is limited.The present invention is can be at camera lens F number constant or relatively large in the situation that, realizes the high brightness output equal with 3LED, and energy consumption is lower, and projector's volume is less.
(4) compare with 3LED light source, projector realizes equal output performance, and light source cost is low more than 2/5 times, and camera lens cost is low more than three times, has better market adaptability.
(5) the mercuryless of projector, more environmental protection have been realized.
Brief description of the drawings
Accompanying drawing 1 is existing 3LED+DLP projector typical optical system schematic diagram.
Accompanying drawing 2 is light-source system structure of the present invention.
The restriction principle that accompanying drawing 3 is optical system.
Embodiment
As shown in Figure 2, the present invention is for the LED light source device of projector, it comprises blue-ray LED light source (B1-LED), red-light LED light source (R-LED), green light LED light source (G-LED, for blue led wafer, surface scribbles green emitting phosphor) and be positioned at the lens combination (being LED gatherer lens system) of each light source front end.At green light LED light source right opposite, the second blue-ray LED light source (B2-LED) is set, the lens combination optical axis coincidence of both and front end.Between green light LED light source and the second blue-ray LED light source, spectroscope B(transmit blue, reflect green light are set).Blue-ray LED light source is arranged on a side of spectroscope B, spectroscope A is set before red-light LED light source.
The blue light of the second blue-ray LED light source transmitting sees through spectroscope B, and it is just focused on green light LED light source.The green glow of green light LED light source transmitting, the green glow stack with green light LED light source excites through the blue light illumination of the second blue-ray LED light source transmitting, through spectroscope B reflection, sees through spectroscope A, enters integrating system through Multiplexing apparatus.The blue light of blue-ray LED light source transmitting sees through spectroscope B and spectroscope A, enters integrating system through Multiplexing apparatus; The ruddiness of red-light LED light source transmitting reflects through spectroscope A, then enters integrating system through Multiplexing apparatus.
G-LED light source fluorescent powder is except being subject to the blue wafer excitation green light of self, also be subject to the irradiation of B2 light source and inspire green glow, the fluorescent powder of G-LED is just equivalent to be subject to 2 blue light sources simultaneously and excites like this, send the diffusion green glow of 1.81 times of left and right, G-LED group light source output light flux significantly promotes.Like this for proportioning white balance, R, B1 light source just significantly hoisting power even approach sufficient power and use, export more Red and blue light luminous flux, final projector total brightness approaches and has promoted one times.
LED light source device of the present invention is surveyed, adopt DMD panel (the model DLP4500:.45 WXGA-800 DDR SERIES 310) system of .45, use Ou Silang LE*P1W light source suit (containing tri-of RGB, be called for short P1, " * " represents R/CG/B, three respectively corresponding model be LERP1W, LECGP1W and LEBP1W), result display brightness promotes 1.86 times, drive at LED under the pattern of non-intersection, reach 880 lumens.
The present invention is especially applicable to being applied to the occasion that light valve area is larger and promotes at double brightness, generally can promote more than 1.8 times, and in the less occasion of light valve area, below 0.45inch, conventionally can promote 1.5～1.8 times of left and right.
Claims (9)
1. a LED light source device for projector, comprises blue-ray LED light source, red-light LED light source, green light LED light source and is positioned at the lens combination of each light source front end, it is characterized in that:
There is green light fluorescent powder on described green light LED light source surface;
On described green light LED light source opposite, the second blue-ray LED light source and lens combination is set, between green light LED light source and the second blue-ray LED light source, spectroscope B is set;
The blue light of described the second blue-ray LED light source transmitting sees through spectroscope B, focuses on green light LED light source.
2. LED light source device according to claim 1, is characterized in that: described green light LED light source and the second blue-ray LED light source are just right, the lens combination optical axis coincidence of both front ends.
3. LED light source device according to claim 1, is characterized in that: described spectroscope B transmit blue, reflect green light.
4. according to the LED light source device one of claim 1-3 Suo Shu, it is characterized in that: the green glow of described green light LED light source self transmitting, green glow stack with green light LED light source excites through the blue light illumination of the second blue-ray LED light source transmitting, through spectroscope B reflection, enters integrating system through Multiplexing apparatus.
5. LED light source device according to claim 1, is characterized in that: described blue-ray LED light source is arranged on a side of spectroscope B, spectroscope A is set before described red-light LED light source.
6. LED light source device according to claim 5, is characterized in that:
The blue light of described blue-ray LED light source transmitting sees through spectroscope B and spectroscope A, enters integrating system through Multiplexing apparatus;
The ruddiness of described red-light LED light source transmitting reflects through spectroscope A, then enters integrating system through Multiplexing apparatus.
7. a LED projector, comprises the LED light source device that one of claim 1 ~ 6 is described.
8. LED according to claim 7 projector, is characterized in that the projector for DLP.
9. LED according to claim 7 projector, is characterized in that being applied to LCD or LCOS projector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410373039.8A CN104102082A (en) | 2014-08-01 | 2014-08-01 | LED projector and light source device thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410373039.8A CN104102082A (en) | 2014-08-01 | 2014-08-01 | LED projector and light source device thereof |
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| CN104102082A true CN104102082A (en) | 2014-10-15 |
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| CN201410373039.8A Pending CN104102082A (en) | 2014-08-01 | 2014-08-01 | LED projector and light source device thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019134266A1 (en) * | 2018-01-04 | 2019-07-11 | 深圳光峰科技股份有限公司 | Light source system and projection apparatus |
| WO2021093563A1 (en) * | 2019-11-12 | 2021-05-20 | 深圳市绎立锐光科技开发有限公司 | Light source apparatus and illumination system |
| US12135495B2 (en) | 2022-04-20 | 2024-11-05 | Qisda Corporation | Light combining structure |
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| JP2005189277A (en) * | 2003-12-24 | 2005-07-14 | Nec Viewtechnology Ltd | Light source device and image display device |
| CN102508401A (en) * | 2011-10-25 | 2012-06-20 | 海信集团有限公司 | Light source device and projector using same |
| CN202330989U (en) * | 2011-11-21 | 2012-07-11 | 深圳市光峰光电技术有限公司 | Light-emitting device and protection system |
| JP2012156182A (en) * | 2011-01-24 | 2012-08-16 | Jvc Kenwood Corp | Light source device using fluorescent material |
| CN102081292B (en) * | 2009-10-28 | 2012-09-05 | 卡西欧计算机株式会社 | Light source unit and projector |
| CN103645596A (en) * | 2013-12-18 | 2014-03-19 | 吴震 | Light emitting device and projection displaying system |
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2014
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005189277A (en) * | 2003-12-24 | 2005-07-14 | Nec Viewtechnology Ltd | Light source device and image display device |
| CN102081292B (en) * | 2009-10-28 | 2012-09-05 | 卡西欧计算机株式会社 | Light source unit and projector |
| JP2012156182A (en) * | 2011-01-24 | 2012-08-16 | Jvc Kenwood Corp | Light source device using fluorescent material |
| CN102508401A (en) * | 2011-10-25 | 2012-06-20 | 海信集团有限公司 | Light source device and projector using same |
| CN202330989U (en) * | 2011-11-21 | 2012-07-11 | 深圳市光峰光电技术有限公司 | Light-emitting device and protection system |
| CN103645596A (en) * | 2013-12-18 | 2014-03-19 | 吴震 | Light emitting device and projection displaying system |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019134266A1 (en) * | 2018-01-04 | 2019-07-11 | 深圳光峰科技股份有限公司 | Light source system and projection apparatus |
| US11906889B2 (en) | 2018-01-04 | 2024-02-20 | Appotronics Corporation Limited | Light source system and projection apparatus |
| WO2021093563A1 (en) * | 2019-11-12 | 2021-05-20 | 深圳市绎立锐光科技开发有限公司 | Light source apparatus and illumination system |
| US12135495B2 (en) | 2022-04-20 | 2024-11-05 | Qisda Corporation | Light combining structure |
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