CN219302862U - Light source system and projection apparatus - Google Patents

Abstract

The utility model discloses a light source system and a projection device. The light source system comprises a first light source module, a second light source module and a first light combining device, wherein the first light source module comprises a first light source, a second light source, a wavelength conversion device and the second light combining device, and the first light source is used for generating light with a first wavelength; the second light source is used for generating first excitation light; the wavelength conversion device is used for generating first lasing light under the irradiation of the first excitation light, and the first lasing light and the light with the first wavelength are light with the same color; the second light combining device is used for combining the light with the first wavelength and the first laser and then emitting the combined light; the second light source module is used for generating light with a second wavelength and light with a third wavelength; the first light combination device is used for combining the light emitted by the first light source module and the light emitted by the second light source module and then emitting the combined light. The utility model can improve the overall brightness of the projection equipment.

Description

Light source system and projection apparatus

Technical Field

The present utility model relates to the field of optics, and in particular, to a light source system and a projection apparatus.

Background

The overall brightness of the projection device is determined by the light source brightness, the geometric efficiency of the light path, the transmittance and reflectance of the optical elements, and the duty of each light source. In the projection technology, the brightness of green light is improved, the brightness of other parts in the original framework is not reduced, and finally the brightness of the whole optical machine is improved, so that the method has important value. At present, four light source channels of red (R), green (G), blue (B) and blue excitation light (BP) are generally arranged in projection equipment taking a Light Emitting Diode (LED) as a light source, wherein the green light passes through the B light source on the back and the BP light source after reflection, so that double-sided excitation (pumping) is realized, and the efficiency is improved by about 150%.

Disclosure of Invention

In view of this, the present utility model provides a light source system and a projection apparatus, which further enhance the brightness of the light source of the target color, thereby enhancing the overall brightness of the projection apparatus.

In a first aspect, the present utility model provides a light source system, including a first light source module, a second light source module, and a first light combining device, wherein,

the first light source module comprises a first light source, a second light source, a wavelength conversion device and a second light combining device, wherein the first light source is used for generating light with a first wavelength; the second light source is used for generating first excitation light; the wavelength conversion device is used for generating first lasing light under the irradiation of the first excitation light, and the first lasing light and the light with the first wavelength are light with the same color; the second light combining device is used for combining the light with the first wavelength and the first laser and then emitting the combined light;

the second light source module is used for generating light with a second wavelength and light with a third wavelength;

the first light combination device is used for combining the light emitted by the first light source module and the light emitted by the second light source module and then emitting the combined light.

In a possible implementation manner, the second light combining device includes a first area and a second area, at least one of the first area and the second area is used for guiding the first excitation light, so that the first excitation light irradiates the wavelength conversion device;

the first region is used for guiding the first laser light, so that at least part of the first laser light is formed into emergent light of the first light source module;

the second region is for guiding the light of the first wavelength or guiding the light of the first wavelength and at least part of the first lasing so that the light of the first wavelength and at least part of the first lasing exits from the same direction.

In a possible implementation manner, the second area is a coating film or an open hole area of the second light combining device, or the second area is a diffusion sheet or a focusing lens.

In a possible implementation manner, the first light source is a laser light source; the second region has an area smaller than an area of the first region.

In a possible implementation manner, the area of the second area is less than or equal to one third of the area of the first area.

In a possible implementation manner, the second area is located at a center position of the first area.

In a possible implementation manner, the first region is configured to transmit at least part of the first excitation light and reflect at least part of the first lasing light; the second region is configured to transmit at least a portion of the first excitation light, the light of the first wavelength, and at least a portion of the first lasing.

In a possible implementation manner, the first light source module further includes a third light source, and the third light source is used for generating second excitation light; the wavelength conversion device is arranged on the surface of the third light source and is also used for generating a first lasing light under the irradiation of the second excitation light.

In a possible implementation, the light of the first wavelength and the first lasing light each comprise light having a wavelength between 540nm and 570 nm; the first excitation light and the second excitation light each comprise light having a wavelength of 440nm-460 nm.

In a possible implementation manner, the second light source module includes a fourth light source, a fifth light source and a third light combining device, where the fourth light source is used to generate the light with the second wavelength, the fifth light source is used to generate the light with the third wavelength, and the third light combining device is used to combine the light with the second wavelength and the light with the third wavelength and then emit the light.

In a possible implementation manner, the second light source module further includes a sixth light source, and the sixth light source is used for generating third excitation light; the fourth light source is an excitation light source with a wavelength conversion material arranged on the surface, and the excitation light source is used for generating fourth excitation light; the first light combining means and the third light combining means are further for directing the third excitation light to the wavelength converting material; the wavelength conversion material is used for generating light with the second wavelength under the irradiation of the third excitation light and the fourth excitation light.

In a possible implementation, the third excitation light and the fourth excitation light each comprise light having a wavelength between 300nm and 380 nm.

In a possible implementation manner, the second light source module further includes a seventh light source, and the seventh light source is used for generating light with a fourth wavelength; the first light combining device comprises a first light splitting and combining element and a second light splitting and combining element, wherein the first light splitting and combining element is used for reflecting the light with the second wavelength and the light with the third wavelength, and transmitting the light with the first wavelength, the first laser receiving light and the light with the fourth wavelength; the second light splitting and combining element is configured to reflect the light of the fourth wavelength, and transmit the light of the second wavelength, the light of the third wavelength, the light of the first wavelength, and the first laser light.

In a possible implementation, the light of the second wavelength comprises light having a wavelength between 600nm and 625 nm; the light of the third wavelength comprises light with a wavelength of 635nm-655 nm; the light of the fourth wavelength comprises light having a wavelength of 440nm-460 nm.

In a possible implementation, the light of the second wavelength comprises light having a wavelength between 440nm and 460 nm; the light of the third wavelength comprises light having a wavelength between 600nm and 625 nm.

In a second aspect, the present utility model provides a projection device comprising the light source system according to the first aspect.

According to the utility model, the light source is added, and fluorescence of corresponding colors is combined through the light combining element, for example, a green laser is added, and the green fluorescence is combined through the light combining element, so that less part of green fluorescence is lost, and the laser is homogenized in a subsequent light path, so that the light source brightness of a target color (such as green) is further improved, and the overall brightness of the projection equipment is further improved.

Drawings

The above and other objects, features and advantages of the present utility model will become more apparent from the following more particular description of embodiments of the present utility model, as illustrated in the accompanying drawings. The accompanying drawings are included to provide a further understanding of embodiments of the utility model and are incorporated in and constitute a part of this specification, illustrate the utility model and together with the embodiments of the utility model, and not constitute a limitation to the utility model. In the drawings, like reference numerals generally refer to like parts. Wherein:

fig. 1 is a schematic block diagram of a light source system according to an embodiment of the present utility model;

fig. 2 is a schematic structural diagram of a light source system according to an embodiment of the present utility model;

fig. 3 is a schematic structural diagram of a light combining device according to an embodiment of the present utility model;

FIG. 4 is a schematic diagram of another light source system according to an embodiment of the present utility model;

fig. 5 is a schematic structural diagram of another light source system according to an embodiment of the present utility model.

Detailed Description

In order to make the technical solution of the present utility model better understood by those skilled in the art, the technical solution of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are only some embodiments of the present utility model, not all embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present utility model without making any inventive effort, shall fall within the scope of the present utility model. Furthermore, while the present disclosure has been described in terms of an exemplary embodiment or embodiments, it should be understood that each aspect of the disclosure may be separately implemented as a complete solution. The following embodiments and features of the embodiments may be combined with each other without conflict.

In embodiments of the present utility model, "at least one" means one or more, and "a plurality" means two or more. The terms "first," "second," and the like, as used herein do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that elements or items preceding the word are included in the element or item listed after the word and equivalents thereof, but does not exclude other elements or items. The term "and/or" includes any and all combinations of one or more of the associated listed items. It is to be understood that the terms "upper," "lower," "inner," "outer," "front," "back," and the like are merely used for convenience in describing the utility model and to simplify the description, and are not to be construed as implying or indicating a limitation on the utility model.

In order that the utility model may be fully understood, a detailed description will be provided below in order to illustrate the technical aspects of the utility model. Preferred embodiments of the present utility model are described in detail below, however, the present utility model may have other embodiments in addition to these detailed descriptions.

Fig. 1 is a schematic block diagram of a light source system according to an embodiment of the present utility model. As shown in fig. 1, the light source system of the present utility model includes a first light source module 100, a second light source module 200 and a light combining device 300, wherein the light emitted from the first light source module 100 and the light emitted from the second light source module 200 are combined by the light combining device 300 and then emitted to the subsequent optical elements, such as compound eyes.

The first light source module 100 includes a light source for generating light of a first wavelength, a light source for generating a laser beam having the same color as the light of the first wavelength, and a light combining device for combining the light of the first wavelength and the laser beam and then emitting the combined light. The light of the first wavelength and the laser light may be green light, red light, or other colors. The light source generating the light with the first wavelength can be a laser light source, an LED light source and the like, for example, the light source is a laser light source, the brightness can be improved, for example, the light source is an LED light source, and the cost can be saved.

The second light source module 200 is used to generate light of a second wavelength and light of a third wavelength. The light of the second wavelength and the light of the third wavelength may be the same color light or different colors light. Illustratively, the light of the second wavelength is blue light and the light of the third wavelength is red light; alternatively, the light of the second wavelength and the light of the third wavelength may both be red light, but the wavelengths of the two are different. The light source generating the second wavelength and the light source generating the third wavelength can be a laser light source, an LED light source and the like, for example, the light source is a laser light source, the brightness can be improved, for example, the light source is an LED light source, and the cost can be saved.

The present utility model can enhance the brightness of a target color (e.g., green) by using two light sources, such as laser and fluorescent light, in the first light source module 100, which generate the same color light, thereby enhancing the overall brightness of the projection device.

The light source system of the present utility model is further described below in connection with specific embodiments.

Example 1

Fig. 2 is a schematic structural diagram of a light source system according to an embodiment of the present utility model. As shown in fig. 2, the first light source module 100 includes a first light source 101, a second light source 102, a wavelength conversion device 103, and a light combining device 104, wherein the first light source 101 is configured to generate light of a first wavelength; the second light source 102 is used for generating excitation light; the wavelength conversion device 103 is used for generating laser light under the irradiation of the excitation light, and the laser light and the light with the first wavelength are light with the same color; the light combining device 104 combines the light of the first wavelength and the laser light and outputs the combined light to form the output light of the first light source module 100.

In some embodiments, the light combining device 104 may be further configured to direct the excitation light generated by the second light source 102 to the wavelength conversion device 103, as shown in fig. 2. The light combining device 104 can combine the light of the first wavelength and the laser light by utilizing characteristics such as the wavelength and the expansion of the light. Alternatively, the light combining device 104 includes a first area a and a second area B, as shown in fig. 3, at least one of which is used to guide and irradiate the excitation light to the wavelength conversion device 103, and the first area a is also used to guide and receive the laser light, so that at least part of the laser light is formed as the outgoing light of the first light source module 100; the second region B may also be used to direct light of the first wavelength, or to direct light of the first wavelength and at least partially lasing such that light of the first wavelength and at least partially lasing exit from the same direction.

Illustratively, the first region A is configured to transmit at least a portion of the excitation light and reflect at least a portion of the lasing light, and the second region B is configured to transmit at least a portion of the excitation light, light of the first wavelength, and at least a portion of the lasing light, as shown in FIG. 2. The first light source 101 is preferably a laser light source, and further, the area of the second region B is smaller than the area of the first region a, preferably, the area of the second region B is equal to or smaller than one third of the area of the first region a, so that the light of the first wavelength is transmitted from the second region B as much as possible, and the loss of the laser light in the second region B is reduced as much as possible. The relative positions of the first area a and the second area B may be set according to actual needs, and preferably, the second area B is located at the center position of the first area a, as shown in fig. 3, so that the first wavelength light and the first laser light are coaxially emitted.

In one embodiment, the first wavelength light and the lasing light are both green light and the excitation light is blue light, e.g., the first light source 101 is a laser light source, the first wavelength light comprises light having a wavelength between 540nm and 570 nm; the excitation light generated by the second light source 102 comprises light having a wavelength of 440nm-460 nm; the wavelength conversion device includes a green phosphor layer that generates laser light containing light having a wavelength of 540nm to 570nm under irradiation of excitation light. The first area a of the light combining device 104 reflects green light and transmits blue light, for example, light having a wavelength of at least 540nm to 570nm and light having a transmission wavelength of at least 440nm to 460 nm; the second region B transmits blue light and green light, for example, light having a wavelength of at least 540nm to 570nm and light having a wavelength of at least 440nm to 460 nm. For example, the second area B may be a blue-transparent and green-transparent film layer (such as a light-splitting film or a polarizing film), or an aperture or a diffusion sheet, or a focusing lens, and the focusing lens may be fixed on the light-combining device 104, for example, adhered on the light-combining device 104 or fixed with a structural member on a side close to the first light source 101, and further, an optical axis of the focusing lens may substantially overlap with an optical axis of the first light source 101, so as to ensure an outgoing direction of light. If the second area B is a polarizing film layer, the polarizing film layer may only have polarization characteristics for green light, such as transmitting green light having a P-vibration state, reflecting green light having an S-vibration state, and the green laser emitted by the first light source 101 has a P-vibration state, then all the green laser emitted by the first light source 101 is transmitted through the second area B, and only a portion of the green fluorescent light irradiated in the second area B having the P-vibration state is transmitted through the second area B and lost, so that the light combining efficiency may be improved.

Further, the wavelength conversion device can be a green fluorescent powder layer or a green fluorescent sheet on the surface of the blue light source, so that the wavelength conversion device can receive excitation of the light sources at two sides, and the excitation efficiency is improved. The light irradiated in the second region B of the light combining device 104 is transmitted by part of the green fluorescence, and is not reflected to form the light emitted from the first light source module 100, but the loss is small because the second region B is small. The first light source 101 irradiates the second area B in a collimated manner due to the small spot and divergence angle of the laser light, and is transmitted by the light combining device 104, and combines with the reflected green fluorescent light to form the outgoing light of the first light source module 100.

With continued reference to fig. 2, the second light source module 200 includes a fourth light source 201, a fifth light source 202, and a light combining device 203, where the fourth light source 201 is configured to generate light with a second wavelength, the fifth light source 202 is configured to generate light with a third wavelength, and the light combining device 203 is configured to combine the light with the second wavelength and the light with the third wavelength and then emit the combined light to form emitted light of the second light source module 200.

In one embodiment, the light of the second wavelength and the light of the third wavelength are blue light and red light, respectively, e.g., the light of the second wavelength comprises light having a wavelength of 440nm-460nm, the light of the third wavelength comprises light having a wavelength of 600nm-625nm and/or a wavelength of 635nm-655nm, and the light combining means 203 is a dichroic element that reflects red light and transmits blue light. For example, the blue light generated by the fourth light source 201 is collimated by the lens and then transmitted through the light combining device 203, and the red light generated by the fifth light source 202 is collimated by the lens and then reflected by the light combining device 203, and both are reflected by the light combining device 300. The light combining device 300 is further configured to transmit green light emitted from the first light source module 100, so as to realize light combining of three colors of red, green and blue.

It should be noted that, the corresponding transmission function in the above embodiment may be changed into reflection, and the reflection function is changed into transmission, so that the function implementation of the whole light path is not affected, and the present utility model will not be described in detail.

Example two

Fig. 4 is a schematic structural diagram of another light source system according to an embodiment of the present utility model. In the embodiment shown in fig. 4, the first light source module 100 is the same as the embodiment shown in fig. 2, and will not be described again.

Unlike the embodiment shown in fig. 2, the second light source module 200 further includes a sixth light source 204 for generating excitation light, the fourth light source 201 is an excitation light source having a wavelength conversion material disposed on a surface thereof, and the wavelength conversion material on the surface of the fourth light source 201 generates light of a second wavelength under irradiation of the excitation light source on a back surface thereof and the excitation light generated by the sixth light source 204.

In one embodiment, the sixth light source 204 is a UV LED, for example, the sixth light source 204 generates ultraviolet light with a wavelength of 300nm-380nm, and the fourth light source 201 is a UV LED with a wavelength conversion material such as a cyan phosphor layer or a cyan phosphor sheet disposed on the surface. The ultraviolet light generated by the sixth light source 204 sequentially passes through the light combining device 300 and the light combining device 203 and irradiates the wavelength conversion material on the surface of the fourth light source 201, the blue light generated by the excitation of the wavelength conversion material through the two UV LEDs is collimated by the lens and then passes through the light combining device 203, the red light generated by the fifth light source 202 is collimated by the lens and then reflected by the light combining device 203, and both light are reflected by the light combining device 300. The light combining device 300 is further configured to transmit green light emitted from the first light source module 100, so as to realize light combining of three colors of red, green and blue.

Example III

Fig. 5 is a schematic structural diagram of another light source system according to an embodiment of the present utility model. In the embodiment shown in fig. 5, the first light source module 100 is the same as the embodiment shown in fig. 2, and will not be described again.

Unlike the embodiment shown in fig. 2, the fourth light source 201 and the fifth light source 202 in the second light source module 200 are used to generate light of the same color, and improve the brightness of the light of the color, and further improve the overall brightness of the projection device. The second light source module 200 further includes a seventh light source 205 for generating light of a fourth wavelength, and the light combining device 300 includes a first light splitting and combining element 301 and a second light splitting and combining element 302, the first light splitting and combining element 301 being configured to reflect light of the second wavelength and light of the third wavelength and transmit outgoing light of the first light source module 100 and light of the fourth wavelength; the second light splitting and combining element 302 is configured to reflect light of the fourth wavelength, and transmit light of the second wavelength, light of the third wavelength, and light emitted from the first light source module 100, so as to combine the light emitted from the first light source module 100 and the light emitted from the second light source module 200.

In some embodiments, the first light splitting element 301 and the second light splitting element 302 in the light combining device 300 are glued in a cross shape, as shown in fig. 5, there is a loss at the glued joint, but the loss is smaller due to the smaller glued area. In other embodiments, the first light splitting element 301 and the second light splitting element 302 may be glued in other forms such as L-shape, T-shape, etc., or not glued, and the two may be fixed according to the actual situation.

In one embodiment, the fourth light source 201 is a red LED, the second wavelength of light generated comprises light having a wavelength of 600nm-625nm, the fifth light source 202 is a dark red LD, and the third wavelength of light generated comprises light having a wavelength of 635nm-655 nm. Red light generated by the red LED and the dark red LD is transmitted and reflected at the light combining device 203, respectively, wavelength-combined light is reflected at the first light splitting and combining element in the light combining device 300. The seventh light source 205 is a blue LED, and the generated light of the fourth wavelength includes light having a wavelength of 440nm to 460nm, and the light of the fourth wavelength is collimated by the lens and reflected at the second light splitting and combining element in the light combining device 300, and is emitted from the same direction as the red light. The light combining device 300 is further configured to transmit green light emitted from the first light source module 100, so as to realize light combining of three colors of red, green and blue.

The embodiment of the present utility model further provides a projection device, which includes the light source system according to the above embodiment, and may further include other components, such as a lens component, where the arrangement of these components may refer to the related prior art, and will not be described herein.

The foregoing is merely illustrative of the present utility model, and the present utility model is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present utility model. Therefore, the protection scope of the present utility model shall be subject to the protection scope of the claims.

Claims (16)

1. A light source system is characterized by comprising a first light source module, a second light source module and a first light combining device, wherein,

the first light source module comprises a first light source, a second light source, a wavelength conversion device and a second light combining device, wherein the first light source is used for generating light with a first wavelength; the second light source is used for generating first excitation light; the wavelength conversion device is used for generating first lasing light under the irradiation of the first excitation light, and the first lasing light and the light with the first wavelength are light with the same color; the second light combining device is used for combining the light with the first wavelength and the first laser and then emitting the combined light;

the second light source module is used for generating light with a second wavelength and light with a third wavelength;

the first light combination device is used for combining the light emitted by the first light source module and the light emitted by the second light source module and then emitting the combined light.

2. The light source system according to claim 1, wherein the second light combining means includes a first region and a second region, at least one of the first region and the second region being for guiding the first excitation light such that the first excitation light irradiates the wavelength conversion means;

the first region is used for guiding the first laser light, so that at least part of the first laser light is formed into emergent light of the first light source module;

the second region is for guiding the light of the first wavelength or guiding the light of the first wavelength and at least part of the first lasing so that the light of the first wavelength and at least part of the first lasing exits from the same direction.

3. A light source system according to claim 2, wherein the second area is a coated or perforated area of the second light combining means, or the second area is a diffuser or a focusing lens.

4. A light source system according to claim 2, wherein the first light source is a laser light source; the second region has an area smaller than an area of the first region.

5. A light source system according to claim 2, wherein the area of the second region is less than or equal to one third of the area of the first region.

6. A light source system as recited in claim 2, wherein said second region is centrally located in said first region.

7. A light source system as recited in claim 2, wherein said first region is configured to transmit at least a portion of said first excitation light and reflect at least a portion of said first lasing light; the second region is configured to transmit at least a portion of the first excitation light, the light of the first wavelength, and at least a portion of the first lasing.

8. The light source system of claim 1, wherein the first light source module further comprises a third light source for generating a second excitation light; the wavelength conversion device is arranged on the surface of the third light source and is also used for generating a first lasing light under the irradiation of the second excitation light.

9. A light source system as recited in claim 8, wherein said first wavelength light and said first lasing light each comprise light having a wavelength of 540nm-570 nm; the first excitation light and the second excitation light each comprise light having a wavelength of 440nm-460 nm.

10. The light source system according to claim 1, wherein the second light source module comprises a fourth light source for generating the light of the second wavelength, a fifth light source for generating the light of the third wavelength, and a third light combining device for combining the light of the second wavelength and the light of the third wavelength and emitting the combined light.

11. The light source system of claim 10, wherein the second light source module further comprises a sixth light source for generating third excitation light; the fourth light source is an excitation light source with a wavelength conversion material arranged on the surface, and the excitation light source is used for generating fourth excitation light; the first light combining means and the third light combining means are further for directing the third excitation light to the wavelength converting material; the wavelength conversion material is used for generating light with the second wavelength under the irradiation of the third excitation light and the fourth excitation light.

12. A light source system as recited in claim 11, wherein said third excitation light and said fourth excitation light each comprise light having a wavelength of 300nm-380 nm.

13. A light source system as recited in claim 10, wherein said second light source module further comprises a seventh light source for generating light at a fourth wavelength; the first light combining device comprises a first light splitting and combining element and a second light splitting and combining element, wherein the first light splitting and combining element is used for reflecting the light with the second wavelength and the light with the third wavelength, and transmitting the light with the first wavelength, the first laser receiving light and the light with the fourth wavelength; the second light splitting and combining element is configured to reflect the light of the fourth wavelength, and transmit the light of the second wavelength, the light of the third wavelength, the light of the first wavelength, and the first laser light.

14. A light source system as recited in claim 13, wherein said light of said second wavelength comprises light having a wavelength of 600nm to 625 nm; the light of the third wavelength comprises light with a wavelength of 635nm-655 nm; the light of the fourth wavelength comprises light having a wavelength of 440nm-460 nm.

15. A light source system as recited in claim 1, wherein said light of said second wavelength comprises light having a wavelength of 440nm-460 nm; the light of the third wavelength comprises light having a wavelength between 600nm and 625 nm.

16. A projection device comprising the light source system of any one of claims 1-15.

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