CN106681090B - Light source module and projection equipment - Google Patents

Light source module and projection equipment Download PDF

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Publication number
CN106681090B
CN106681090B CN201510746465.6A CN201510746465A CN106681090B CN 106681090 B CN106681090 B CN 106681090B CN 201510746465 A CN201510746465 A CN 201510746465A CN 106681090 B CN106681090 B CN 106681090B
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China
Prior art keywords
light
color wheel
light source
reflecting
sheet
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Active
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CN201510746465.6A
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Chinese (zh)
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CN106681090A (en
Inventor
胡飞
侯海雄
李屹
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Shenzhen Appotronics Corp Ltd
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Appotronics Corp Ltd
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Priority to CN201510746465.6A priority Critical patent/CN106681090B/en
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    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/20—Lamp housings
    • G03B21/2006—Lamp housings characterised by the light source
    • G03B21/2033—LED or laser light sources
    • G03B21/204—LED or laser light sources using secondary light emission, e.g. luminescence or fluorescence
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/20—Lamp housings
    • G03B21/2006—Lamp housings characterised by the light source
    • G03B21/2013—Plural light sources
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/20—Lamp housings
    • G03B21/2066—Reflectors in illumination beam

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Optics & Photonics (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Projection Apparatus (AREA)

Abstract

The invention provides a light source module and projection equipment, comprising: a first light source for emitting a first light and a second light source for emitting a second light; the color wheel comprises a first color wheel area and a second color wheel area, the first color wheel area and the second color wheel area are non-overlapped annular areas, the first color wheel area generates and reflects fluorescent light of at least one color under the irradiation of first light, and the second color wheel area is used for reflecting or transmitting second light or emitting mixed light of fluorescent light of one color and the second light under the irradiation of the second light; the reflection and transmission sheet is arranged at the intersection of the light-emitting light path of the first light source and the light-emitting light path of the first color wheel region and is used for reflecting the first light and the second light, transmitting the fluorescent light emitted by the first color wheel region and reflecting the fluorescent light emitted by the second color wheel region so as to enable the second light and the fluorescent light to be combined into one beam of light. The light source module and the projection equipment provided by the invention can improve the light emitting efficiency, the light emitting brightness and the heat dissipation performance.

Description

Light source module and projection equipment
Technical Field
The present invention relates to the field of projection technologies, and in particular, to a light source module and a projection apparatus.
Background
The light source module of the existing miniature projection equipment comprises an excitation light source, a transmission type color wheel and a light collecting system, wherein the excitation light source and the light collecting system are respectively arranged at two sides of the transmission type color wheel, and different areas of the transmission type color wheel are provided with different fluorescent powders, and the fluorescent powders comprise red fluorescent powder, green fluorescent powder and blue fluorescent powder. When the laser emitted by the excitation light source irradiates different areas of the transmission type color wheel, fluorescent light with different colors can be excited, and the fluorescent light with different colors can be mixed into white light required by projection after being collected by the light collecting system.
However, since the fluorescent light emitted from the transmissive color wheel needs to be collected by the light collecting system through the color wheel, the light emitting efficiency and the light emitting brightness of the light source module are reduced, and the heat dissipation of the transmissive color wheel and the light source module is affected.
Disclosure of Invention
In view of this, the present invention provides a light source module and a projection apparatus, which solve the problems of low light emitting efficiency and light emitting brightness and poor heat dissipation of the existing light source module.
In order to achieve the above purpose, the present invention provides the following technical solutions:
a light source module, comprising:
a first light source for emitting first light and a second light source for emitting second light;
a color wheel including a first color wheel region and a second color wheel region, the first color wheel region and the second color wheel region being non-overlapping annular regions, the first color wheel region generating and reflecting fluorescent light of at least one color under the irradiation of the first light, the second color wheel region being for reflecting or transmitting the second light or emitting a mixed light of fluorescent light of one color and the second light under the irradiation of the second light;
the reflection and transmission sheet is arranged at the intersection of the light-emitting light path of the first light source and the light-emitting light path of the first color wheel region and is used for reflecting the first light and the second light, transmitting the fluorescent light emitted by the first color wheel region and reflecting the fluorescent light emitted by the second color wheel region so as to enable the second light and the fluorescent light to be combined into one beam of light.
Preferably, the light source module further includes a light collecting system, and the light collecting system is disposed between the color wheel and the reflective and transmissive sheet, and is configured to collect light rays exiting from the color wheel and transmit the light rays to the reflective and transmissive sheet.
Preferably, the light source module further includes a lens group disposed between the second color wheel area and the second reflective sheet, where the lens group is used to collect the second light reflected by the second color wheel area.
Preferably, the light source module further includes a first lens group and a second lens group, the first lens group is located between the second light source and the second color wheel area, and the second lens group is located between the second color wheel area and the reflective sheet.
Preferably, the light source module further comprises a first reflecting sheet and a second reflecting sheet;
the first reflecting sheet is positioned on the light-emitting path of the second light source and is used for reflecting the second light emitted by the second light source to the second color wheel area;
the second color wheel area is a reflection area and is used for scattering and reflecting second light reflected by the first reflecting sheet to the second reflecting sheet;
the second reflecting sheet is used for reflecting the second light to the light-emitting surface of the reflecting and transmitting sheet so that the reflecting and transmitting sheet reflects the second light.
Preferably, the light source module further includes a reflective sheet, the reflective sheet and the second light source are respectively located at two sides of the color wheel, and the reflective sheet and the reflective and transmissive sheet are located at the same side of the color wheel;
the second color wheel area is a transmission area and is used for transmitting second light generated by the second light source to the reflecting sheet;
the reflective sheet is used for reflecting the second light transmitted by the second color wheel area to the light emitting surface of the reflective and transmissive sheet so that the reflective and transmissive sheet reflects the second light.
Preferably, the light source module further comprises a first reflecting sheet and at least three second reflecting sheets;
the first reflecting sheet is used for reflecting the second light emitted by the second light source to the second color wheel area;
the second color wheel area is a transmission area and is used for transmitting the second light reflected by the first reflecting sheet;
the at least three second reflecting plates are used for reflecting the second light transmitted by the second color wheel area to the light emitting surface of the reflecting and transmitting plate so that the reflecting and transmitting plate reflects the second light.
Preferably, the first color wheel region is located outside the second color wheel region; alternatively, the first color wheel region is located inside the second color wheel region.
Preferably, the first light and the second light are blue light, and the fluorescence generated by the first color wheel area is yellow light;
or the first light and the second light are blue light, and the fluorescence generated by the first color wheel area is red light and green light.
A projection device comprising a light source module as claimed in any one of the preceding claims.
Compared with the prior art, the technical scheme provided by the invention has the following advantages:
according to the light source module and the projection equipment provided by the invention, the first color wheel region capable of generating and emitting fluorescent light is the reflective color wheel, and the light emitting efficiency and the light emitting brightness of the reflective color wheel are higher than those of the transmissive color wheel, so that the light emitting efficiency and the light emitting brightness of the light source module can be improved, and the heat dissipation performance of the light source module and the projection equipment can be further improved.
Because the light source module provided by the application uses two light sources to irradiate different parts of the color wheel to obtain the tricolor light, compared with the prior art, the light source module has the advantages of greatly reducing the volume of the light source and being beneficial to the miniaturization of the projector.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present invention, and that other drawings can be obtained according to the provided drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of a light source module according to a first embodiment of the present invention;
fig. 2 is a schematic structural diagram of a color wheel according to a first embodiment of the present invention;
fig. 3 is a schematic structural diagram of a light source module according to a second embodiment of the present invention;
fig. 4 is a schematic structural diagram of a light source module according to a third embodiment of the present invention;
fig. 5 is a schematic structural diagram of another light source module according to the third embodiment of the present invention.
Detailed Description
As described in the background art, the fluorescent light emitted from the transmissive color wheel can be collected by the light collecting system only through the color wheel, which reduces the light emitting efficiency and brightness of the light source module and affects the heat dissipation of the transmissive color wheel and the light source module.
Accordingly, the present invention is directed to a light source module, which overcomes the above-mentioned problems of the prior art, and includes:
a first light source for emitting first light and a second light source for emitting second light;
a color wheel including a first color wheel region and a second color wheel region, the first color wheel region and the second color wheel region being non-overlapping annular regions, the first color wheel region generating and reflecting fluorescent light of at least one color under the irradiation of the first light, the second color wheel region being for reflecting or transmitting the second light or emitting a mixed light of fluorescent light of one color and the second light under the irradiation of the second light;
the reflection and transmission sheet is arranged at the intersection of the light-emitting light path of the first light source and the light-emitting light path of the first color wheel region and is used for reflecting the first light and the second light, transmitting the fluorescent light emitted by the first color wheel region and reflecting the fluorescent light emitted by the second color wheel region so as to enable the second light and the fluorescent light to be combined into one beam of light.
The invention also provides projection equipment, which comprises the light source module.
According to the light source module and the projection equipment provided by the invention, the first color wheel region which generates and emits fluorescence can reflect fluorescence, and the light emitting efficiency and the light emitting brightness of the reflective color wheel are higher than those of the transmissive color wheel, so that the light emitting efficiency and the light emitting brightness of the light source module can be improved, and the heat dissipation performance of the light source module and the projection equipment can be further improved.
Because the light source module provided by the application uses two light sources to irradiate different parts of the color wheel to obtain the tricolor light, compared with the prior art, the light source module has the advantages of greatly reducing the volume of the light source and being beneficial to the miniaturization of the projector.
The foregoing is a core idea of the present invention, and in order that the above objects, features and advantages of the present invention can be more clearly understood, a detailed description of a specific embodiment of the present invention will be given below with reference to the accompanying drawings.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways other than those described herein, and persons skilled in the art may make similar uses without departing from the spirit of the invention, so that the invention is not limited to specific embodiments that are disclosed below.
In the following detailed description of the embodiments of the present invention, reference is made to the accompanying drawings, which form a part hereof, and in which are shown by way of illustration only, and in which is shown by way of illustration only, and in which the scope of the invention is not limited for ease of illustration. In addition, the three-dimensional dimensions of length, width and depth should be included in actual fabrication.
The following is a detailed description of several embodiments.
Example 1
The present embodiment provides a light source module, as shown in fig. 1, including a first light source 40, a second light source 41, a color wheel 42, a light collecting system 43, a lens group 44, a reflective transmissive sheet 45, a first reflective sheet 46 and a second reflective sheet 47.
Wherein, the first light source 40 is used for emitting the first light, and the second light source 41 is used for emitting the second light. In the present embodiment, the first light source 40 and the second light source 41 may be the same light emitting device, such as a laser emitting blue laser, but the present invention is not limited thereto, and in other embodiments, the first light source 40 and the second light source 41 may be different light emitting devices, for example, the first light source 40 is a laser emitting blue light, and the second light source 41 is a light emitting diode emitting blue light. The first light and the second light may have the same color or different colors. In the embodiment of the invention, only the first light and the second light are blue laser lambda 0 For illustration, where the first light and the second light are both blue laser light lambda 0 It does not mean that the wavelengths of the first light and the second light are necessarily the same, that is, the dominant wavelengths of the first light and the second light may be different.
In the present embodiment, the color wheel 42 includes a first color wheel area 420 and a second color wheel area 421, as shown in fig. 2, the first color wheel area 420 and the second color wheel area 421 are non-overlapping annular areas, and the first color wheel area 420 is located outside the second color wheel area 421, but the present invention is not limited thereto, and in other embodiments, the first color wheel area 420 may be located inside the second color wheel area 421. The color wheel 42 is further provided with driving means for driving the color wheel 42 to rotate around the central axis in the same direction (direction indicated by the arrow).
The first color wheel area 420 generates fluorescent light of at least one color under the irradiation of the first light, and the generated fluorescent light is reflected to the reflective transmissive sheet 45 by the first color wheel area 420. The second color wheel area 421 is a reflective area or a transmissive area, and is used for reflecting or transmitting the second light, and in particular, the second color wheel area 421 in this embodiment is a reflective area, such as a reflective lambertian scattering surface.
In addition, the second color wheel area 421 can generate fluorescence of one color while reflecting or transmitting the second light, that is, the second color wheel area 421 is further used for emitting a mixed light of the fluorescence of one color and the second light under the irradiation of the second light. For example, when the second light is blue light and the color of the blue light is deviated, such as purple, a small amount of phosphor such as green phosphor may be incorporated in the second color wheel area 421, and the color of the blue light may be corrected by green fluorescence generated by the green phosphor. Further, a film may be coated on the reflective and transmissive sheet 45 to make the reflective and transmissive sheet 45 transmit the green fluorescent light generated in the first color wheel area 420 and reflect the green fluorescent light generated in the second color wheel area 421, so that the transmitted green fluorescent light and the reflected green fluorescent light are combined with other light transmitted or reflected by the reflective and transmissive sheet 45 into white light.
In the present embodiment, the reflective-transmissive sheet 45 is for reflecting the blue laser light λ which is the first light and the second light 0 Fluorescent light lambda emitted by the transmissive first color wheel region 420 1 The method comprises the steps of carrying out a first treatment on the surface of the The light collecting system 43 is disposed between the color wheel 42 and the reflective and transmissive sheet 45, and includes at least one condensing lens for collecting the light emitted from the color wheel 42 and transmitting the light to the reflective and transmissive sheet 45; the first reflecting sheet 46 is used for emitting blue laser light λ as the second light emitted from the second light source 41 0 Reflected to the second color wheel area 421; the second color wheel area 421 is used for reflecting the blue laser light lambda as the second light reflected by the first reflector 46 0 Scattered and reflected to the second reflection sheet 47; the second reflecting sheet 47 is used for reflecting the second light reflected by the second color wheel area 421, namely blue laser lambda 0 Reflects to the light-emitting surface of the reflective-transmissive sheet 45 to make the reflection transmittedThe sheet 45 reflects the second light, blue laser lambda 0 。
In the working process of the light source module provided in this embodiment, the first light emitted by the first light source 40 is blue laser λ 0 Incident on the reflective-transmissive sheet 45, the reflective-transmissive sheet 45 emits blue laser light lambda as the first light 0 Reflected onto the first color wheel region 420 of the color wheel 42; during the rotation of the color wheel 42, the phosphor in the first color wheel region 420 rotates to the first light, blue laser λ 0 And on the optical path of the blue laser lambda 0 Generates fluorescence lambda of corresponding color under irradiation of (C) 1 The fluorescence lambda 1 Will be reflected by the first color wheel region 420, and the reflected fluorescence lambda 1 Is collected by the light collection system 43 and transmitted to the reflective-transmissive sheet 45;
the blue laser lambda as the second light emitted from the second light source 41 0 The light is reflected by the first reflecting sheet 46 and then enters the second color wheel area 421 of the color wheel 42, scattered and reflected by the second color wheel area 421 and then enters the second reflecting sheet 47, and is reflected by the second reflecting sheet 47 to the light emitting surface of the reflective and transmissive sheet 35;
the second light reflected by the reflective and transmissive sheet 35, namely blue laser light lambda 0 And fluorescence lambda transmitted through the reflective transmissive sheet 35 1 White light required for projection is synthesized and supplied to a subsequent projection device.
In the present embodiment, the time-series second light and fluorescence lambda can be formed by controlling the rotation of the color wheel 42 and the switching of the first light source 40 and the second light source 41 1 So that the second light and fluorescence lambda 1 Forming white light for projection. For example, at a first timing, the first light source 40 is turned on, and the first color wheel region 420 is rotated to a first light, blue laser λ 0 Generates fluorescence lambda on the optical path of (a) 1 Fluorescence lambda 1 The light passes through the light collecting system 43 and the reflective and transmissive sheet 45 and then exits to form emergent light of a first time sequence; a second timing for turning on the second light source 41, the second light is blue laser lambda 0 After being reflected by the first reflecting sheet 46, the second color wheel area 421 and the second reflecting sheet 47, the light is reflected by the reflective and transmissive sheet 47 and then emitted, so as to form emergent light of a second time sequence.
Optionally, the first light and the second light are blue laser light lambda 0 Fluorescence lambda generated by the first color wheel region 420 1 The reflective-transmissive sheet 45 is a film sheet that reflects blue light and transmits yellow light. Alternatively, the first light and the second light are blue laser light lambda 0 The first color wheel region 420 is divided into a red phosphor segment and a green phosphor segment, and the red phosphor segment rotates to a first light, blue laser lambda 0 Fluorescent light lambda generated on the light path of (2) 1 The green fluorescent powder segment rotates to the first light, namely blue laser lambda 0 Fluorescent light lambda generated on the light path of (2) 1 The reflective transmissive sheet 45 is a film that reflects blue light and transmits red and green light.
In fig. 1 of the present embodiment, the upper half of the first color wheel 42 emits fluorescence λ 1 The lower part emits excitation light lambda 0 However, the present invention is not limited thereto, and in other embodiments, the lower half of the color wheel 42 can emit the fluorescent light λ by changing the position (up or down) of the color wheel 42 1 The upper part emits excitation light lambda 0 。
The light source module provided by the embodiment is characterized in that the excitation light source, the reflection transmission sheet and the light collecting system are positioned on the same side of the first color wheel, so that the volume of the light source module can be reduced; in addition, in the embodiment, three primary colors of light can be obtained by irradiating different parts of a color wheel by two light sources, so that compared with the prior art, the volume of the light sources is greatly reduced, and the miniaturization of a projector is facilitated; in addition, the first color wheel region can reflect fluorescence, namely, the first color wheel region is a reflective color wheel, and the light emitting efficiency and the light emitting brightness of the reflective color wheel are higher than those of the transmissive color wheel, so that the light emitting efficiency, the light emitting brightness and the heat dissipation performance of the light source module are improved.
Example two
The present embodiment provides a light source module, as shown in fig. 3, including a first light source 50, a second light source 51, a color wheel 52, a light collecting system 53, a first lens group 54, a second lens group 55, a reflective transmissive sheet 56, and a reflective sheet 57.
In the present embodiment, the structures of the color wheel 52, the first color wheel area and the second color wheel area are the same as those of the color wheel 42, the first color wheel area 420 and the second color wheel area 421 in the first embodiment, which is different in that the second color wheel area in the present embodiment is a transmission area for transmitting the second light generated by the second light source 51 to the reflective sheet 57, and of course, the second color wheel area in the present embodiment may also have at least one color phosphor to perform color correction on the transmitted second light. Based on this, the second light source 51 and the reflective sheet 57 in the present embodiment are respectively located at both sides of the color wheel 52, and the reflective sheet 57 and the reflective transmissive sheet 56 are located at the same side of the color wheel 52, as shown in fig. 3.
Also, in the present embodiment, only the first light and the second light are blue laser light λ 0 An example is described.
Wherein the reflective-transmissive sheet 56 is for reflecting the first light and the second light, i.e., blue laser light lambda 0 Fluorescent light lambda emitted by the first color wheel region 1 The method comprises the steps of carrying out a first treatment on the surface of the The reflecting sheet 57 is used for transmitting the blue laser lambda as the second light transmitted by the second color wheel region 0 Is reflected to the light-emitting surface of the reflective-transmissive plate 56 so that the reflective-transmissive plate 56 reflects the second light, i.e. blue laser lambda 0 。
In the working process of the light source module provided in this embodiment, the first light emitted by the first light source 50 is blue laser λ 0 Incident on the reflective-transmissive plate 56, the reflective-transmissive plate 56 emits blue laser light lambda as the first light 0 Reflected onto the first color wheel area of the color wheel 52; the fluorescent powder in the first color wheel area is in the first light, blue laser lambda 0 Generates fluorescence lambda of corresponding color under irradiation of (2) 1 The fluorescence lambda 1 Will be reflected by the first color wheel region, and the reflected fluorescence lambda 1 Is collected by the light collection system 53 and transmitted to the reflective-transmissive sheet 56;
the blue laser lambda as the second light emitted from the second light source 51 0 The second light, blue laser lambda, is collected by the first lens group 54 and then enters the second color wheel region, and is scattered and transmitted by the second color wheel region 0 After passing through the second lens group 55, the second light is incident on the reflecting sheet 57, and the reflecting sheet 57 emits blue laser light λ 0 The light-emitting surface of the reflective-transmissive sheet 56;
the second light reflected by the reflective and transmissive plate 56, namely blue laser light lambda 0 And fluorescence lambda transmitted through the reflective transmissive plate 56 1 A beam of white light is synthesized and provided for subsequent projectionAnd (3) a device.
Alternatively, the first light source 50 and the second light source 51 in this embodiment are lasers emitting blue laser light, and the fluorescence λ generated by the first color wheel region 1 The reflective and transmissive sheet 56 is a film that reflects blue light and transmits yellow light. Alternatively, the fluorescence lambda generated by the first color wheel region 1 The reflective transmissive sheet 56 is a film sheet that reflects blue light to transmit red light and green light for red light and green light.
In addition, the first light source 50 and the second light source 51 may be different light emitting devices, for example, the first light source 50 is a laser emitting blue laser, the second light source 51 is a light emitting diode emitting blue light, and when the second light source 51 is a light emitting diode, the second light emitted by the second light source 51 may directly exit without being scattered by the second color wheel area, for example, the second light emitted by the second light source 51 may directly enter the light exit surface of the reflective and transmissive sheet 56, so that the second light and the fluorescent light are combined into one light.
In this embodiment, the first color wheel region may be located outside the second color wheel region, or may be located inside the second color wheel region, which is not limited to this.
Also, in the present embodiment, the time-series blue laser light λ can be formed by controlling the rotation of the color wheel 52 and controlling the switching of the first light source 50 and the second light source 51 0 And fluorescence lambda 1 So that blue laser lambda 0 And fluorescence lambda 1 Forming white light for projection. For example, a first timing, turning on the first light source 50, the first color wheel region is turned to blue laser lambda 0 Generates fluorescence lambda on the optical path of (a) 1 Fluorescence lambda 1 The light passes through the light collecting system 53 and the reflective and transmissive sheet 56 and then exits to form emergent light of a first time sequence; a second timing sequence for turning on the second light source 51, blue laser lambda 0 After passing through the first lens group 54, the second lens group 55 and the reflecting sheet 57, the light is reflected by the reflecting and transmitting sheet 56 and emitted to form emitted light of a second time sequence.
The light source module provided by the embodiment is characterized in that the excitation light source, the reflection transmission sheet and the light collecting system are positioned on the same side of the first color wheel, so that the volume of the light source module can be reduced; in addition, in the embodiment, three primary colors of light can be obtained by irradiating different parts of a color wheel by two light sources, so that compared with the prior art, the volume of the light sources is greatly reduced, and the miniaturization of a projector is facilitated; in addition, the first color wheel region can reflect fluorescence, namely, the first color wheel region is a reflective color wheel, and the light emitting efficiency and the light emitting brightness of the reflective color wheel are higher than those of the transmissive color wheel, so that the light emitting efficiency, the light emitting brightness and the heat dissipation performance of the light source module are improved.
Example III
The present embodiment provides a light source module, as shown in fig. 4, including a first light source 60, a second light source 61, a color wheel 62, a light collecting system 63, a reflective transmissive sheet 64, a first reflective sheet 65, three second reflective sheets 66 to 68, a condensing lens 69 between the second reflective sheet 66 and the second reflective sheet 67, and a condensing lens 70 between the second reflective sheet 67 and the second reflective sheet 68.
In this embodiment, the structures of the color wheel 62, the first color wheel area and the second color wheel area are the same as the structures of the color wheel 42, the first color wheel area and the second color wheel area in the first embodiment, and are not described herein.
Wherein the reflective-transmissive sheet 64 is for reflecting the first light and the second light, i.e., blue laser light lambda 0 Fluorescent light lambda emitted by the first color wheel region 1 The method comprises the steps of carrying out a first treatment on the surface of the The first reflecting sheet 65 is used for emitting blue laser light λ as the second light emitted from the second light source 61 0 Reflecting to the second color wheel area; three second reflecting sheets 66 to 67 and condenser lenses 69 and 70 for transmitting the second light, blue laser light lambda, of the second color wheel region 0 Reflects to the light-emitting surface of the reflective-transmissive sheet 64 to make the reflective-transmissive sheet 64 reflect the second light, i.e. blue laser lambda 0 。
In the working process of the light source module provided in this embodiment, the first light emitted by the first light source 60 is blue laser λ 0 Will be incident on the reflective and transmissive plate 64, and the reflective and transmissive plate 64 will emit the first light, blue laser light lambda 0 Reflected onto the first color wheel region of the color wheel 62; the fluorescent powder in the first color wheel area is in the first light, blue laser lambda 0 Generates fluorescence lambda of corresponding color under irradiation of (2) 1 The fluorescence lambda 1 Will be reflected by the first color wheel region, and the reflected fluorescence lambda 1 Will be collected and transmitted by the light collection system 63To the reflective transmissive sheet 64;
the blue laser lambda as the second light emitted from the second light source 61 0 The reflected light is incident on the second color wheel region after being reflected by the first reflecting sheet 65, and the second light is blue laser lambda after being transmitted and scattered by the second color wheel region 0 The light is reflected by the second reflecting sheet 66 and collected by the condensing lens 69, then enters the second reflecting sheet 67, and is reflected by the second reflecting sheet 67, collected by the condensing lens 70 and reflected by the second reflecting sheet 68, then enters the light emergent surface of the reflective and transmissive sheet 64;
the second light reflected by the reflective and transmissive sheet 64, namely blue laser light lambda 0 And fluorescence lambda transmitted through the reflective transmissive sheet 64 1 A beam of white light is synthesized and provided to a subsequent projection device.
Also, the first light source 60 and the second light source 61 in the present embodiment are lasers emitting blue laser light, and the fluorescence λ generated by the first color wheel region 1 The reflective and transmissive sheet 64 is a film that reflects blue light and transmits yellow light. Alternatively, the fluorescence lambda generated by the first color wheel region 1 The reflective transmissive sheet 64 is a film sheet that reflects blue light and transmits red light and green light, which may be red light and green light.
In addition, the first light source 60 and the second light source 61 may be different light emitting devices, for example, the first light source 60 is a laser emitting blue light, the second light source 61 is a light emitting diode emitting blue light, and at this time, the second light emitted by the second light source 61 may be directly transmitted to the second reflective sheet 66 without being scattered by the second color wheel area on the color wheel 62, or the second light emitted by the second light source 61 may be directly incident on the light emitting surface of the reflective transmissive sheet 64.
Also, in the present embodiment, the blue laser lambda, which is the second light with timing, can be formed by controlling the rotation of the color wheel 62 and controlling the switching of the first light source 60 and the second light source 61 0 And fluorescence lambda 1 So that the second light, blue laser lambda 0 And fluorescence lambda 1 Forming white light for projection. The specific control process is the same as that of the first embodiment, and will not be described here again.
In this embodiment, the first color wheel region may be located outside the second color wheel region, or may be located inside the second color wheel region. When the first color wheel region is located inside the second color wheel region, the position of the color wheel 62 may be adjusted as shown in fig. 5. The light source module structure in fig. 5 is different from the light source module structure in fig. 4 in that: in fig. 4, the first light is incident on the upper half of the color wheel 62, the second light is incident on the lower half of the color wheel 62, and in fig. 5, the first light is incident on the lower half of the color wheel 62, and the second light is incident on the upper half of the color wheel 62.
The light source module provided by the embodiment is characterized in that the excitation light source, the reflection transmission sheet and the light collecting system are positioned on the same side of the first color wheel, so that the volume of the light source module can be reduced; in addition, in the embodiment, three primary colors of light can be obtained by irradiating different parts of a color wheel by two light sources, so that compared with the prior art, the volume of the light sources is greatly reduced, and the miniaturization of a projector is facilitated; in addition, the first color wheel region can reflect fluorescence, namely, the first color wheel region is a reflective color wheel, and the light emitting efficiency and the light emitting brightness of the reflective color wheel are higher than those of the transmissive color wheel, so that the light emitting efficiency, the light emitting brightness and the heat dissipation performance of the light source module are improved.
Example IV
The embodiment provides a projection device, which includes the light source module provided in any one of the embodiments above.
The projection device provided by the embodiment is characterized in that the excitation light source, the reflection transmission sheet and the light collection system are positioned on the same side of the first color wheel, so that the volume of the light source module can be reduced; in addition, in the embodiment, three primary colors of light can be obtained by irradiating different parts of a color wheel by two light sources, so that compared with the prior art, the volume of the light sources is greatly reduced, and the miniaturization of a projector is facilitated; in addition, the first color wheel region can reflect fluorescence, namely, the first color wheel region is a reflective color wheel, and the light emitting efficiency and the light emitting brightness of the reflective color wheel are higher than those of the transmissive color wheel, so that the light emitting efficiency, the light emitting brightness and the heat dissipation performance of the light source module are improved.
In the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other. The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (9)

1. A light source module, comprising:
the light source comprises a first light source and a second light source, wherein the first light source is used for emitting first light, the second light source is used for emitting second light, and the first light and the second light are blue light;
a color wheel including a first color wheel region and a second color wheel region, the first color wheel region and the second color wheel region being non-overlapping annular regions, the first color wheel region generating and reflecting fluorescent light of at least one color under the irradiation of the first light, the second color wheel region being for reflecting or transmitting the second light or emitting a mixed light of fluorescent light of one color and the second light under the irradiation of the second light;
a first reflective sheet disposed on an optical path of the second light to reflect the second light to the second color wheel region;
the reflective transmission sheet is arranged at the intersection of the light-emitting light path of the first light source and the light-emitting light path of the first color wheel region, and is provided with a coating film for reflecting the first light and the second light, transmitting fluorescent light emitted by the first color wheel region and reflecting fluorescent light emitted by the second color wheel region so as to enable the second light and the fluorescent light to be combined into white light required by projection.
2. The light source module of claim 1, further comprising a light collection system disposed between the color wheel and the reflective transmissive sheet for collecting light exiting the color wheel and transmitting the light to the reflective transmissive sheet.
3. The light source module of claim 2, further comprising a lens group disposed between the second color wheel region and the first reflective sheet, the lens group configured to condense the second light reflected by the second color wheel region.
4. A light source module as recited in claim 3, further comprising a first lens group and a second lens group, the first lens group being located between the second light source and the second color wheel region, the second lens group being located between the second color wheel region and the first reflective sheet.
5. The light source module of claim 1, further comprising a second reflector sheet;
the second color wheel area is a reflection area and is used for scattering and reflecting second light reflected by the first reflecting sheet to the second reflecting sheet;
the second reflecting sheet is used for reflecting the second light to the light-emitting surface of the reflecting and transmitting sheet so that the reflecting and transmitting sheet reflects the second light.
6. The light source module of claim 1, further comprising at least three second reflective sheets;
the second color wheel area is a transmission area and is used for transmitting the second light reflected by the first reflecting sheet;
the at least three second reflecting plates are used for reflecting the second light transmitted by the second color wheel area to the light emitting surface of the reflecting and transmitting plate so that the reflecting and transmitting plate reflects the second light.
7. The light source module according to any one of claims 1-6, wherein the first color wheel region is located outside the second color wheel region; alternatively, the first color wheel region is located inside the second color wheel region.
8. The light source module of claim 7, wherein the fluorescent light generated by the first color wheel region is yellow light;
alternatively, the fluorescence generated by the first color wheel region is red light and green light.
9. A projection device comprising the light source module of any one of claims 1-8.
CN201510746465.6A 2015-11-05 2015-11-05 Light source module and projection equipment Active CN106681090B (en)

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