CN102393598A - Light source device and projector adopting same - Google Patents
Light source device and projector adopting same Download PDFInfo
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- CN102393598A CN102393598A CN2011103439055A CN201110343905A CN102393598A CN 102393598 A CN102393598 A CN 102393598A CN 2011103439055 A CN2011103439055 A CN 2011103439055A CN 201110343905 A CN201110343905 A CN 201110343905A CN 102393598 A CN102393598 A CN 102393598A
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Abstract
The invention discloses a light source device and a projector adopting the same, which relate to the technical field of laser display and solve the problems that the existing light source device is complicated in structure, high in cost and higher in energy consumption. In the embodiment of the invention, as the light source device adopts a transmission type fluorescence plate, green rays generated by exciting green emitting phosphor by blue laser can transmit the transmission type fluorescence plate, and runs along the direction the same with the running direction of the blue laser transmitting the transmission type fluorescence plate, so that the running directions of blue rays and the green rays transmitting the transmission type fluorescence plate can be the same with that of red rays by only one dichroic mirror, thereby simplifying the structure of the light source device; and after transmitting the transmission type fluorescence plate, the blue rays can reach a emitting position by passing by the only one dichroic mirror, thereby greatly shortening an optical path and avoiding larger energy loss so as to reduce the energy consumption of the light source device.
Description
Technical field
The present invention relates to the laser display technology field, the projector that relates in particular to light supply apparatus and use it.
Background technology
Laser display technology reproduces the display technique of objective world rich colors with red laser, green laser, blue laser as light source, and wherein, the laser of every kind of color can be produced by semiconductor laser.
At present, the also prematurity of the technology of green light semiconductor if adopt green light semiconductor can produce serious speckle as green-light source, influences the quality of display frame.Utilize the blue-light semiconductor laser instrument to excite green emitting phosphor to produce the principle of green glow, solved above-mentioned speckle issue.
The synoptic diagram of the light supply apparatus that Fig. 1 processes for principle existing, that utilize the blue-light semiconductor laser instrument to excite green emitting phosphor to produce green glow.
Light supply apparatus comprises: blue-light semiconductor laser instrument 11, red light semiconductor laser 12, fluorescent plate 13 and light-gathering optics.Fluorescent plate 13 comprises blue light transmission area and green fluorescence tagma; The blue light b that is sent by blue-light semiconductor laser instrument 11 can see through fluorescent plate 13 from the blue light transmission area; Green emitting phosphor in the green fluorescence tagma covers on the reflection horizon of fluorescent plate 13 substrates; The blue light b that is sent by blue-light semiconductor laser instrument 11 shines and inspires green glow g on the green emitting phosphor, and this green glow g is through the reflection in reflection horizon, towards with the opposite direction operation of blue light b traffic direction.
The light that sends by blue-light semiconductor laser instrument 11, red light semiconductor laser 12 and by fluorescent plate 13 transmissions, the light that reflects synthetic a branch of behind light-gathering optics X penetrates from the outgoing position as light source.
Light-gathering optics comprises: first dichroic mirror 14, second dichroic mirror 15, first catoptron 16 and second catoptron 17.Wherein, first dichroic mirror 14 is for seeing through the lens of blue light and ruddiness and reflect green light, and second dichroic mirror 15 is for seeing through the lens of blue light and reflect green light and ruddiness.
The blue light b that blue-light semiconductor laser instrument 11 sends exposes on the fluorescent plate 13 after first dichroic mirror 14 sees through, and excites green emitting phosphor to produce green glow g.The reflection horizon (not shown in figure 1) reflection of green glow g on fluorescent plate 13, towards the direction operation opposite with the blue light traffic direction, after 14 reflections of first dichroic mirror, through 15 reflections of second dichroic mirror, X penetrates from the outgoing position then again.
Along with fluorescent plate 13 rotates to transmission area, the blue light b that blue-light semiconductor laser instrument 11 sends sees through, and after first catoptron 16 and 17 reflections of second catoptron, sees through through second dichroic mirror 15 again, and X penetrates from the outgoing position then.The ruddiness r that is sent by red light semiconductor laser 12 sees through through first dichroic mirror 14, and through 15 reflections of second dichroic mirror, X penetrates from the outgoing position then again.Ruddiness r, green glow g, blue light b just can synthesize a branch of as light source X ejaculation from the outgoing position like this.
In the above-mentioned light supply apparatus; Since by the green glow g of blue-light excited generation by the reflective layer reflects on the fluorescent plate 13; Make that green glow g and traffic direction through the blue light r of fluorescent plate 13 transmissions are opposite, the light-gathering optics that therefore need have a more optical module is gathered together the light of different directions synthetic a branch of, for example; Ruddiness r and green glow g need to converge to outgoing position X through two dichroic mirrors among Fig. 2; And blue light b needs after fluorescent plate 13 sees through, and again through two baffle reflections, sees through through second dichroic mirror then and arrives outgoing position X.More optical module has also increased the cost of light supply apparatus not only bad for the simplification of light supply apparatus structure.
In addition, because blue light b needs through two catoptrons before arriving the outgoing position, optical path length and complicacy cause the energy loss of blue light b bigger, thereby cause the energy consumption of light supply apparatus higher.
Summary of the invention
The projector that embodiments of the invention provide a kind of light supply apparatus and use it, this light supply apparatus is simple in structure, cost is low, and has lower energy consumption.
For achieving the above object, embodiments of the invention adopt following technical scheme:
A kind of light supply apparatus comprises: blue-light semiconductor laser instrument, red-light source, transmission-type fluorescent plate and dichroic mirror; Be formed with on the said transmission-type fluorescent plate: transmission area that the blue light that supplies said blue-light semiconductor laser instrument to be produced sees through and the green fluorescence tagma that receives said blue-light excited generation and transmit green; Said dichroic mirror, be used to make by the light of said transmission-type fluorescent plate transmission and synthesize by the ruddiness that said red-light source produced a branch of, to form light source.
A kind of projector comprises above-mentioned light supply apparatus.
The light supply apparatus that the embodiment of the invention provides and using in its projector; Because light supply apparatus has adopted the transmission-type fluorescent plate; Can make by blue laser and excite green emitting phosphor and the green glow that produces sees through this transmission-type fluorescent plate; And along with the identical direction operation of traffic direction of the blue laser that sees through this transmission-type fluorescent plate, therefore only need a dichroic mirror just can make by the blue light of this transmission-type fluorescent plate transmission and the traffic direction of green glow, consistent with the traffic direction of ruddiness; Replaced the light-gathering optics that uses in the prior art, have a plurality of optical modules, made that light supply apparatus is simple in structure, cost is low.
In addition, blue light only needs just can arrive the outgoing position through a dichroic mirror after the transmission-type fluorescent plate sees through, and has shortened light path greatly, has avoided bigger energy loss, thereby has reduced the energy consumption of light supply apparatus.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art; To do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below; Obviously, the accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills; Under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the conventional lighting sources schematic representation of apparatus;
The synoptic diagram of a kind of light supply apparatus that Fig. 2 provides for the embodiment of the invention;
The synoptic diagram of the another kind of light supply apparatus that Fig. 3 provides for the embodiment of the invention;
The floor map of the transmission-type fluorescent plate that Fig. 4 provides for the embodiment of the invention;
Fig. 5 is the sectional view of dotted line A-A1 a kind of structure partly of transmission-type fluorescent plate shown in Figure 3;
Fig. 6 is the sectional view of the dotted line A-A1 another kind of structure partly of transmission-type fluorescent plate shown in Figure 3.
11,21,31-blue-light semiconductor laser instrument Reference numeral:; The 12-red light semiconductor laser; The 13-fluorescent plate; 14-first dichroic mirror; 15-second dichroic mirror; 16-first catoptron; 17-second catoptron; X, Y-outgoing position; R-ruddiness; The g-green glow; The b-blue light; 22,32-red-light source; 23,33-transmission-type fluorescent plate; 24,34-dichroic mirror; 41,57,67-transmission area; 42,54,65-green fluorescence tagma; The 43-circular hole; 51,61-substrate; 52,62-first surface; 53,63-optical thin film; 55,66-green emitting phosphor; 56,64-second surface.
Embodiment
To combine the accompanying drawing in the embodiment of the invention below, the technical scheme in the embodiment of the invention is carried out clear, intactly description, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills are not making the every other embodiment that is obtained under the creative work prerequisite, all belong to the scope of the present invention's protection.
Embodiment 1
Present embodiment provides a kind of light supply apparatus, and is as shown in Figure 2, and this light supply apparatus comprises: blue-light semiconductor laser instrument 21, red-light source 22, transmission-type fluorescent plate 23 and dichroic mirror 24.
Wherein, said transmission-type fluorescent plate 23 is as shown in Figure 4, is formed with: transmission area 41 that the blue light that supplies said blue-light semiconductor laser instrument to be produced sees through and the green fluorescence tagma 42 that receives said blue-light excited generation and transmit green.The area in two zones is than selecting according to the energy requirement of the white balance and the light source that produces.Certainly; Transmission-type fluorescent plate 23 is not limited to circular slab shown in Figure 4; Can be square plate, or other shape that those skilled in the art knew, each district also is not limited to along the circumferential direction distribute; Also can be other distribution mode that those skilled in the art know, the various distribution modes that can make blue light expose to each district respectively through the position of controlling the transmission-type fluorescent plate can both be used for the present invention.
Among Fig. 2, said dichroic mirror 24, be used to make by the light of said transmission-type fluorescent plate 23 transmissions and synthesize by the ruddiness r that said red-light source 22 is produced a branch of, to form light source.Y penetrates this light source from the outgoing position.This light source can be used as the light source of projector, or the light source of other display device.
Through the position of control transmission-type fluorescent plate 23, the blue light b that blue-light semiconductor laser instrument 21 is produced is radiated at the transmission area on the transmission-type fluorescent plate 23, makes blue light see through transmission-type fluorescent plate 23.
Position through adjustment transmission-type fluorescent plate 23; Can make blue light b be radiated at the green fluorescence tagma on the transmission-type fluorescent plate 23; Make the blue-light excited generation green glow of the green fluorescence pruinescence g in this district, because this this green glow of transmission-type fluorescent plate 23 transmissives g, therefore; This green glow g sees through transmission-type fluorescent plate 23, along with the identical direction operation of blue light b traffic direction.
In the light supply apparatus that the embodiment of the invention provides; Owing to adopted the transmission-type fluorescent plate; Can make by blue laser and excite green emitting phosphor and the green glow that produces sees through this transmission-type fluorescent plate; And along with the identical direction operation of traffic direction of the blue laser that sees through this transmission-type fluorescent plate, therefore only need a dichroic mirror just can make by the blue light of this transmission-type fluorescent plate transmission and the traffic direction of green glow, consistent with the traffic direction of ruddiness; Replaced the light-gathering optics that uses in the prior art, have a plurality of optical modules, made that light supply apparatus is simple in structure, cost is low.
In addition, blue light only needs just can arrive the outgoing position through a dichroic mirror after the transmission-type fluorescent plate sees through, and light path shortens greatly, has avoided bigger energy loss, thereby has reduced the energy consumption of light supply apparatus.
Red-light source in the present embodiment can be a red light semiconductor laser, also can be red-light LED (Light Emitting Diode, light emitting diode).
And the number of present embodiment medium blue optical semiconductor laser can be at least one, and number is many more, and then the energy of blue light is high more, plays an important role for the brightness that improves the light source that forms.
Introduce two kinds of optional embodiments of above-mentioned transmission-type fluorescent plate below.
As stated, transmission-type fluorescent plate shown in Figure 4 is a circular slab, and it comprises: transmission area 41 that the blue light that supplies said blue-light semiconductor laser instrument to be produced sees through and the green fluorescence tagma 42 that receives said blue-light excited generation and transmit green.Also comprise the circular hole 43 that is positioned at circular slab central authorities, this circular hole 43 is used to install the driver part that circular slab is rotated in a circumferential direction.Through the driving of driver part, transmission area on the circular slab 41 can alternately rotate to the assigned address that blue light can shine with green fluorescence tagma 42, makes the blue light transmission, or makes blue-light excited green emitting phosphor and produce green glow.
Transmission-type fluorescent plate surface shown in Figure 4 can be provided with the radiator structure (not shown) except transmission area 41 and region surface green fluorescence tagma 42, so that the long-time Stimulated Light irradiation of transmission-type fluorescent plate and the heat of generation can distribute in time.This radiator structure can be a sheet metal.
Fig. 5 is the sectional view of this circular slab dotted line A-A1 part in Fig. 4, and this circular slab can comprise: process substrate 51 by transparent material; Be coated with on the first surface 52 of said substrate and make the blue light transmission, and make the optical thin film 53 of green glow reflection; The said optical thin film surface coverage in green fluorescence tagma 54 has green emitting phosphor 55; Blue light from said substrate 51, with 56 incidents of said first surface 52 opposing second surface.
Rotate to green fluorescence tagma 54 through driver part control circular slab shown in Figure 5; After making blue light through said transparent substrate 51 and said optical thin film 53; Can expose on the green emitting phosphor 55; Green emitting phosphor 55 is excited to produce green glow, because 53 pairs of green glows of optical thin film have reflex, makes green glow penetrate from optical thin film 53 surfaces.Rotate to transmission area 57 through this circular slab of driver part control, can make blue light through said transparent substrate 51 and said optical thin film 53 after, penetrate from first surface 52.
Green emitting phosphor and optical thin film can not be formed on the same side of substrate, and can be as shown in Figure 6, are arranged at both sides relative in the substrate respectively.At this moment, the transmission-type fluorescent plate comprises by transparent material and processes substrate 61; Be coated with on the first surface 62 of said substrate 61 and make the blue light transmission, and make the optical thin film 63 of green glow reflection; Said substrate 61, with said first surface 62 opposing second surface 64 on be coated with green emitting phosphor 66 corresponding to the position in said green fluorescence tagma 65; Said blue light is from first surface 62 incidents of said substrate 61.
Rotate to green fluorescence tagma 65 through driver part control circular slab shown in Figure 6; After making blue light through said optical thin film 63 and said transparent substrate 61, can expose on the green emitting phosphor 66 on the second surface 64, green emitting phosphor 66 is excited to produce green glow; Part green glow directly penetrates from second surface 64; Another part green glow penetrates towards first surface 62 through substrate 61, because 63 pairs of green glows of optical thin film have reflex, makes this part green glow also penetrate from second surface 64.
Rotate to transmission area 67 through this circular slab of driver part control, can make blue light through said optical thin film 63 and said transparent substrate 61 after, penetrate from second surface 64.
The substrate of Fig. 5 and transmission-type fluorescent plate transmission area shown in Figure 6 can be removed, so that do not receive any stopping directly transmission during blue light illumination to this district; Perhaps, receive the diffusion of diffusion sheet during blue light illumination to this district, the energy loss in the time of can reducing blue light through this district for having the diffusion sheet of transmission function.
Energy loss when in substrate, moving in order to reduce blue light and green glow as far as possible; Can select suitable base material for use; Make its transmissivity be higher than transmissivity to other wavelength light except that blue light and green glow to blue light and green glow; Promptly select for use the higher material of the transmissivity of blue light and green glow is made substrate, like materials such as k9, quartz.
Certainly, the structure of transmission-type fluorescent plate is not limited to Fig. 5 and situation shown in Figure 6, also can not use above-mentioned optical thin film, but can make the directivity of the green glow of being excited to produce not strong, and some green glow can not arrive the outgoing position.The transmission-type fluorescent plate also can be those skilled in the art know other can make the structure of the green glow transmission of being excited to produce.
Fig. 4～Fig. 6 only shows the situation that fluorescent plate is a circular slab, and fluorescent plate also can be other shape, as square.
Embodiment 2
Present embodiment provides a kind of light supply apparatus again, and is as shown in Figure 3, and this light supply apparatus has identical composition with light supply apparatus shown in Figure 2, comprising: blue-light semiconductor laser instrument 31, red-light source 32, transmission-type fluorescent plate 33 and dichroic mirror 34.
Wherein, said transmission-type fluorescent plate 23 is as shown in Figure 4, is formed with: transmission area 41 that the blue light that supplies said blue-light semiconductor laser instrument to be produced sees through and the green fluorescence tagma 42 that receives said blue-light excited generation and transmit green.The area in two zones is than selecting according to the energy requirement of the white balance and the light source that produces.Certainly; Transmission-type fluorescent plate 23 is not limited to circular slab shown in Figure 4; Can be square plate, or other shape that those skilled in the art knew, each district also is not limited to along the circumferential direction distribute; Also can be other distribution mode that those skilled in the art know, the various distribution modes that can make blue light expose to each district respectively through the position of controlling the transmission-type fluorescent plate can both be used for the present invention.
This dichroic mirror 34 is to see through by the ruddiness r that red-light source produced, and the lens of reflect blue b and green glow g, that is to say; This dichroic mirror 34 is through reflect blue b and green glow g; Changed the traffic direction of blue light b and green glow g, make by the traffic direction of the light (blue light b and green glow g) of transmission-type fluorescent plate 33 transmissions consistent with the traffic direction of ruddiness r, thereby the light that ruddiness r is reached by 33 transmissions of transmission-type fluorescent plate synthesizes a branch of; Form light source, Y penetrates from the outgoing position.This light source can be used as the light source of projector, or the light source of other display device.
The principle of work of the transmission-type fluorescent plate among the principle of work of the transmission-type fluorescent plate that present embodiment provides and Fig. 2 is identical, specifically referring to the description among the embodiment 1, repeats no more at this.
In the light supply apparatus that the embodiment of the invention provides; Owing to adopted the transmission-type fluorescent plate; Can make by blue laser and excite green emitting phosphor and the green glow that produces sees through this transmission-type fluorescent plate; And along with the identical direction operation of traffic direction of the blue laser that sees through this transmission-type fluorescent plate, therefore only need a dichroic mirror just can make by the blue light of this transmission-type fluorescent plate transmission and the traffic direction of green glow, consistent with the traffic direction of ruddiness; Replaced the light-gathering optics that uses in the prior art, have a plurality of optical modules, made that light supply apparatus is simple in structure, cost is low.
In addition, blue light only needs just can arrive the outgoing position through a dichroic mirror after the transmission-type fluorescent plate sees through, and light path shortens greatly, has avoided bigger energy loss, thereby has reduced the energy consumption of light supply apparatus.
Red-light source in the embodiment of the invention can be a red light semiconductor laser, also can be red-light LED.
And the number of embodiment of the invention medium blue optical semiconductor laser can be at least one, and number is many more, and then the energy of blue light is high more, plays an important role for the brightness that improves the light source that forms.
Above-mentioned transmission-type fluorescent plate can adopt Fig. 5 and structure shown in Figure 6,, repeats no more at this referring to embodiment 1 about Fig. 5 and transmission-type fluorescent plate structrual description shown in Figure 6.
In addition, the substrate of Fig. 5 and transmission-type fluorescent plate transmission area shown in Figure 6 can be removed, so that do not receive any stopping directly transmission during blue light illumination to this district; Perhaps, receive the diffusion of diffusion sheet during blue light illumination to this district, the energy loss in the time of can reducing blue light through this district for having the diffusion sheet of transmission function.
Energy loss when in substrate, moving in order to reduce blue light and green glow as far as possible; The transmission-type fluorescent plate can be selected suitable base material for use; Make its transmissivity be higher than transmissivity to other wavelength light except that blue light and green glow to blue light and green glow; Promptly select for use the higher material of the transmissivity of blue light and green glow is made substrate, like materials such as k9, quartz.
Certainly, the structure of transmission-type fluorescent plate is not limited to Fig. 5 and situation shown in Figure 6, also can not use optical thin film, but can make the directivity of the green glow of being excited to produce not strong, and some green glow can not arrive the outgoing position.The transmission-type fluorescent plate also can be those skilled in the art know other can make the structure of the green glow transmission of being excited to produce.
Fig. 4～Fig. 6 only shows the situation that fluorescent plate is a circular slab, and fluorescent plate also can be other shape, as square.
Embodiment 3
Present embodiment provides a kind of projector, and it comprises the light supply apparatus of describing among embodiment 1 or the embodiment 2, and the display device that this light supply apparatus is used in the projector provides light source.
Therefore the projector that present embodiment provides, has reduced cost of manufacture and energy consumption owing to adopted the light supply apparatus of describing among embodiment 1 or the embodiment 2.
The embodiment of the invention is mainly used in occasions such as TV, micro projection, commerce and entertainment systems.
The above; Be merely embodiment of the present invention, but protection scope of the present invention is not limited thereto, any technician who is familiar with the present technique field is in the technical scope that the present invention discloses; The variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of said claim.
Claims (10)
1. a light supply apparatus is characterized in that, comprising: blue-light semiconductor laser instrument, red-light source, transmission-type fluorescent plate and dichroic mirror;
Be formed with on the said transmission-type fluorescent plate: transmission area that the blue light that supplies said blue-light semiconductor laser instrument to be produced sees through and the green fluorescence tagma that receives said blue-light excited generation and transmit green;
Said dichroic mirror, be used to make by the light of said transmission-type fluorescent plate transmission and synthesize by the ruddiness that said red-light source produced a branch of, to form light source.
2. light supply apparatus according to claim 1 is characterized in that, said transmission-type fluorescent plate comprises by transparent material processes substrate; Be coated with on the first surface of said substrate and make said blue light transmission, and make the optical thin film of said green glow reflection; The said optical thin film surface coverage in said green fluorescence tagma has green emitting phosphor; Said blue light from said substrate, with the incident of said first surface opposing second surface.
3. light supply apparatus according to claim 1 is characterized in that, said transmission-type fluorescent plate comprises by transparent material processes substrate; Be coated with on the first surface of said substrate and make said blue light transmission, and make the optical thin film of said green glow reflection; Said substrate, with said first surface opposing second surface on be coated with green emitting phosphor corresponding to the position in said green fluorescence tagma; Said blue light is from the first surface incident of said substrate.
4. according to claim 2 or 3 described light supply apparatuses, it is characterized in that the substrate of said transmission-type fluorescent plate transmission area is removed or is the diffusion sheet with transmission function.
5. according to claim 2 or 3 described light supply apparatuses, it is characterized in that said substrate is higher than the transmissivity to other wavelength light except that said blue light and said green glow to the transmissivity of said blue light and said green glow.
6. light supply apparatus according to claim 1 is characterized in that, said transmission-type fluorescent plate is a circular slab, and said light supply apparatus also comprises the driver part that said transmission-type fluorescent plate is rotated in a circumferential direction.
7. light supply apparatus according to claim 1 is characterized in that, said dichroic mirror is to see through said blue light and said green glow, and reflects the lens of said ruddiness, perhaps is to see through said ruddiness, and reflects the lens of said blue light and said green glow.
8. light supply apparatus according to claim 1 is characterized in that, said red-light source is red light semiconductor laser or red light-emitting diode.
9. light supply apparatus according to claim 1 is characterized in that, is provided with radiator structure except that said transmission area and the region surface the said green fluorescence tagma on the said transmission-type fluorescent plate.
10. a projector is characterized in that, comprises each described light supply apparatus of claim 1～9.
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| CN201110343905.5A CN102393598B (en) | 2011-11-03 | 2011-11-03 | Light source device and projector adopting same |
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| CN201110343905.5A CN102393598B (en) | 2011-11-03 | 2011-11-03 | Light source device and projector adopting same |
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| CN102393598B (en) * | 2011-11-03 | 2014-03-26 | 海信集团有限公司 | Light source device and projector adopting same |
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| CN104460207A (en) * | 2014-09-11 | 2015-03-25 | 海信集团有限公司 | Laser light source and projection display device |
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| CN111258156A (en) * | 2018-11-30 | 2020-06-09 | 青岛海信激光显示股份有限公司 | Method for driving laser light source, and laser projector |
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