CN219302864U

CN219302864U - Light source system and projection equipment

Info

Publication number: CN219302864U
Application number: CN202223242724.6U
Authority: CN
Inventors: 吴昊; 袁敏
Original assignee: Yibin Jimi Photoelectric Co Ltd
Current assignee: Yibin Jimi Photoelectric Co Ltd
Priority date: 2022-12-05
Filing date: 2022-12-05
Publication date: 2023-07-04
Anticipated expiration: 2032-12-05

Abstract

The application relates to the technical field of display, and discloses a light source system and projection equipment, the light source system includes light source, wavelength conversion component and filter element, and wavelength conversion component includes wavelength conversion district and first diffusion district, and filter element includes filter region and second diffusion district, wherein: the first diffusion area is used for carrying out speckle suppression on the light beam generated by the light source; the second diffusion region is used for carrying out speckle suppression on the light beam after the speckle suppression of the first diffusion region; the wavelength conversion region is used for being excited by the light beam generated by the light source to generate an excited light beam; and a filter region for filtering the excited light beam generated by the wavelength conversion region. The method carries out multiple speckle suppression processing on the light beam generated by the light source, combines the wavelength conversion element to generate stimulated luminescence, and can suppress speckle interference, so that the projection equipment realizes high-brightness high-quality pictures.

Description

Light source system and projection equipment

Technical Field

The application relates to the technical field of projection display, in particular to a light source system and projection equipment.

Background

In projection display products, the light source system is a very important component, and its function is to convert light rays of different colors, different angular distributions, different brightness and different shapes into a uniform spot of light that irradiates the active area of the display chip.

In the field of projection display, conventional bulbs have not been adopted due to their own defects, and novel light sources such as LEDs, phosphors, and lasers have been increasingly becoming the main stream of light sources for projection display because they exhibit excellent characteristics in terms of brightness, color, lifetime, energy consumption, and the like. However, the laser light source suffers from speckle, so how to achieve high-quality image quality with high brightness is a problem to be solved.

Disclosure of Invention

The application provides a light source system which can be used for projection equipment, can inhibit speckle interference, and has simple light path and compact structure.

In a first aspect, the present application provides a light source system comprising a light source, a wavelength converting element comprising a wavelength converting region and a first diffusion region, and a filter element comprising a filter region and a second diffusion region, wherein:

the first diffusion area is used for carrying out speckle suppression on the light beam generated by the light source;

the second diffusion region is used for carrying out speckle suppression on the light beam after the speckle suppression of the first diffusion region;

the wavelength conversion region is used for being excited by the light beam generated by the light source to generate an excited light beam;

and a filter region for filtering the excited light beam generated by the wavelength conversion region.

In some embodiments, the light source system further comprises a first light splitting and combining element and a first reflecting element;

the light beam generated by the light source is emitted into the first diffusion area through the first light splitting and combining element to carry out speckle suppression, and the light beam after speckle suppression is reflected to the second diffusion area through the first reflecting element to carry out speckle suppression again.

In some embodiments, the light source system further comprises a polarizing beam splitting element and a phase element;

the light beam generated by the light source is emitted by the polarization beam splitting element to the phase element, the light beam is emitted by the phase element to the first diffusion area for speckle suppression, the light beam after speckle suppression is reflected by the first diffusion area to the phase element, is converted into light with the second polarization state by the phase element, and is emitted by the polarization beam splitting element to the second diffusion area for speckle suppression again.

In some embodiments, the phase element and the wavelength converting element are disposed independently of each other;

alternatively, when the phase element and the wavelength conversion element are connected by a connector or the phase element and the wavelength conversion element are integrally formed, the balance element is provided in a symmetrical region of the phase element on the wavelength conversion element.

In some embodiments, the light source system further comprises a first light splitting and combining element;

the light beam generated by the light source is emitted into the wavelength conversion region through the first light splitting and combining element, the wavelength conversion region is excited by the light beam generated by the light source to generate an excited light beam, the excited light beam is reflected to the first light splitting and combining element, and the excited light beam is emitted into the light filtering region through the first light splitting and combining element to be filtered.

In some embodiments, the filter region includes a first filter region and a second filter region;

the stimulated luminescence beam generated by the wavelength conversion region is reflected to the first light splitting and combining element, and is emitted into the first filtering region through the first light splitting and combining element to be filtered and then emitted out of the first color light;

the stimulated luminescence beam generated by the wavelength conversion region is reflected to the first light-splitting and light-combining element, and is emitted into the second light-filtering region through the first light-splitting and light-combining element to be filtered and then emitted out of the second color light.

In some embodiments, the wavelength-converting region comprises a first wavelength-converting region and a second wavelength-converting region, and the filtering region comprises a first filtering region and a second filtering region;

the light beam generated by the light source is emitted into the first wavelength conversion region through the first light splitting and combining element, the first wavelength conversion region is excited by the light beam generated by the light source to generate a first excited light beam which is reflected to the first light splitting and combining element, and the first excited light beam is emitted into the first light filtering region through the first light splitting and combining element to filter and emit first color light;

the light beam generated by the light source is emitted into the second wavelength conversion region through the first light splitting and combining element, the second wavelength conversion region is excited by the light beam generated by the light source to generate a second excited light beam which is reflected to the first light splitting and combining element, and the second excited light beam is emitted into the second light filtering region through the first light splitting and combining element to be filtered and emitted out of the second color light.

In some embodiments, the light beam generated by the light source comprises a first target color light beam and a second target color light beam;

a first diffusion region for performing speckle suppression on a first target color light beam and a second target color light beam generated by the light source;

the second diffusion region is used for performing speckle suppression on the first target color light beam and the second target color light beam after the speckle suppression of the first diffusion region;

the wavelength conversion region is used for being excited by the first target color light beam generated by the light source to generate a target excited light beam;

and the filter area is used for filtering the target excited light beam generated by the wavelength conversion area.

In some embodiments, the light source system further comprises a second reflective element, a second light splitting and combining element, and a light homogenizing element;

the light beam after the speckle suppression is injected into a light homogenizing element for homogenizing through a second light splitting and combining element;

the filtered light beam is reflected to the second light splitting and combining element through the second reflecting element, and is emitted into the light homogenizing element through the second light splitting and combining element for homogenizing.

In some embodiments, the wavelength conversion element and the optical filter element are integrally formed, or the wavelength conversion element and the optical filter element are connected through a connecting piece, and the wavelength conversion element and the optical filter element correspond to one driving device;

the driving device drives the wavelength conversion element to enable the light beam generated by the light source to be emitted into the first diffusion region, and simultaneously drives the filter element to enable the light beam with the speckle of the first diffusion region restrained to be emitted into the second diffusion region;

the driving device drives the wavelength conversion element to enable the light beam generated by the light source to enter the wavelength conversion region, and simultaneously drives the filter element to enable the excited light beam generated by the wavelength conversion element to enter the filter region.

In a second aspect, the present application provides a projection device, including the light source system according to the first aspect and any one of the possible implementation manners of the first aspect.

The light beam generated by the light source is subjected to multiple speckle suppression processing through adding the diffusion region, and stimulated luminescence is generated by combining the wavelength conversion element, so that speckle interference can be suppressed, and a projection device can realize a high-brightness high-quality picture. And the light path of the light source system is simple and the structure is compact.

Drawings

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

FIG. 1 is a schematic diagram of a wavelength conversion element according to an embodiment of the present disclosure;

FIG. 2 is a schematic structural diagram of a filter element according to an embodiment of the present disclosure;

FIG. 3 is a schematic diagram of an integrated wavelength conversion element and filter element in an embodiment of the present application;

FIG. 4 is a schematic view of a light source system according to another embodiment of the present application;

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

Detailed Description

In order to make the technical solutions in the present application better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only some embodiments of the present application, but 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 present application. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, shall fall within the scope of the present application. Furthermore, while the disclosure has been presented in terms of an exemplary embodiment or embodiments, it should be understood that various aspects of the disclosure can be practiced separately from the disclosure in a complete subject matter. The following embodiments and features of the embodiments may be combined with each other without conflict.

In the embodiments of the present application, words such as "exemplary," "for example," and the like are used to indicate by way of example, illustration, or description. Any embodiment or design described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments or designs. Rather, the term use of an example is intended to present concepts in a concrete fashion.

Unless otherwise defined, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this application belongs. 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.

For a thorough understanding of the present application, a detailed description will be provided below in order to explain technical aspects of the present application. Preferred embodiments of the present application are described in detail below, however, the present application may have other implementations in addition to these detailed descriptions.

The application provides a light source system includes light source, wavelength conversion component and filter element, and wavelength conversion component includes wavelength conversion region and first diffusion region, and filter element includes filter region and second diffusion region, wherein: the first diffusion area is used for carrying out speckle suppression on the light beam generated by the light source; the second diffusion region is used for carrying out speckle suppression on the light beam after the speckle suppression of the first diffusion region; the wavelength conversion region is used for being excited by the light beam generated by the light source to generate an excited light beam; and a filter region for filtering the excited light beam generated by the wavelength conversion region.

Alternatively, the wavelength converting element may comprise at least one wavelength converting region and a first diffusion region. The wavelength conversion region may have a reflection characteristic or a transmission characteristic; the wavelength conversion element includes a wavelength conversion region, for example, a wavelength conversion region having a yellow phosphor that is excited to emit yellow light, such as a Yttrium Aluminum Garnet (YAG) phosphor containing cerium (Ce) as an activator. For another example, the wavelength converting element includes a first wavelength converting region and a second wavelength converting region; for example, the first wavelength conversion region has a red phosphor that is excited to emit red light, and the second wavelength conversion region has a green phosphor that is excited to emit green light. The first diffusion region may be a diffusion sheet. Alternatively, the specific shape of the wavelength conversion element is not limited, and the wavelength conversion element may be cylindrical. For example, as shown in fig. 1, which is a side developed view of the wavelength converting element structure, the first wavelength converting region 41 is a red phosphor (R), the second wavelength converting region 42 is a green phosphor (G), and the first diffusion region 43 is a diffusion sheet (D).

Alternatively, the filter element may comprise at least one filter region and a second diffusion region. Wherein the second diffusion region may be a diffusion sheet. The filter area can filter the light beam according to the wavelength characteristics to obtain a light beam with purer color; for example, the filter element may include a first filter region, which may be a filter that filters out red light, and a second filter region, which may be a filter that filters out green light. For another example, the filter element includes a filter region, which may be a filter that filters out red light or a filter that filters out green light. Alternatively, the specific shape of the filter element is not limited, and for example, the filter element may be a disc shape. For example, as shown in fig. 2, which is a top view of the structure of the filter element, the first filter region 61 is a red filter (R), the second filter region 62 is a green filter (G), and the second diffusion region 63 is a diffusion sheet (D).

Optionally, the wavelength conversion element and the optical filter element are integrally formed, or the wavelength conversion element and the optical filter element are connected through a connecting piece, and the wavelength conversion element and the optical filter element correspond to a driving device; the driving device drives the wavelength conversion element to enable the light beam generated by the light source to be emitted into the first diffusion region, and simultaneously drives the filter element to enable the light beam with the speckle of the first diffusion region restrained to be emitted into the second diffusion region; the driving device drives the wavelength conversion element to enable the light beam generated by the light source to enter the wavelength conversion region, and simultaneously drives the filter element to enable the excited light beam generated by the wavelength conversion element to enter the filter region. For example, as shown in fig. 3, a schematic structural diagram of the integration of the filtering element and the wavelength conversion element is shown; the wavelength converting element 4 may be a cylinder, the filter element 6 may be a disc, the connector 5 may be a cylinder of smaller diameter than the wavelength converting element 4, the diameter of the filter element 6 is larger than the diameter of the wavelength converting element 4, and the central axes of the wavelength converting element 4, the filter element 6 and the connector 5 coincide. By integrating the wavelength conversion element and the filter element, the light source system has compact structure and simple light path while ensuring that the light beam can carry out speckle suppression for a plurality of times.

Alternatively, the light source may include one or more laser light sources or LED light sources, or a hybrid light source of LEDs and laser light sources, or the like. When the number of the lenses is large, the focusing compression lens group can be added, so that the efficiency is improved. For example, a laser light source (bld) that generates blue laser light is included in the light source; for another example, the light source includes a laser light source (rld) capable of generating red laser light and a laser light source (bld) capable of generating blue laser light; for another example, a laser light source (bld) generating blue laser light and a laser light source (gnd) generating green laser light are included in the light sources, and so on. For example, the light beam generated by the light source may be at least one of blue laser light, red laser light, green laser light.

In some embodiments, the light beam generated by the light source comprises a first target color light beam and a second target color light beam; a first diffusion region for performing speckle suppression on a first target color light beam and a second target color light beam generated by the light source; the second diffusion region is used for performing speckle suppression on the first target color light beam and the second target color light beam after the speckle suppression of the first diffusion region; the wavelength conversion region is used for being excited by the first target color light beam generated by the light source to generate a target excited light beam; and the filter area is used for filtering the target excited light beam generated by the wavelength conversion area. The first target color light beam and the second target color light beam are not limited, and for example, the first target color light beam may be a blue laser light, and the second target color light beam may be a red laser light or a green laser light. The target excited beam may not be limited, and may be, for example, green or red.

In some embodiments, the light source system further comprises a first light splitting and combining element and a first reflecting element; the light beam generated by the light source is emitted into the first diffusion area through the first light splitting and combining element to carry out speckle suppression, and the light beam after speckle suppression is reflected to the second diffusion area through the first reflecting element to carry out speckle suppression again. The first reflective element may be a mirror or a reflective film coated element. The first light-splitting optical element has the characteristic of reflecting and transmitting light in different wavelength ranges; for example, the first light splitting element may transmit blue light, reflect yellow and/or red and/or green light.

In some embodiments, the light source system further comprises a polarizing beam splitting element and a phase element; the light beam generated by the light source is emitted by the polarization beam splitting element to the phase element, the light beam is emitted by the phase element to the first diffusion area for speckle suppression, the light beam after speckle suppression is reflected by the first diffusion area to the phase element, is converted into light with the second polarization state by the phase element, and is emitted by the polarization beam splitting element to the second diffusion area for speckle suppression again. Wherein the phase element may be a half wave plate. The polarization beam splitter may have a property of transmitting or reflecting light in a polarization state, for example, the polarization beam splitter may reflect a light beam in an S state and transmit a light beam in a P state.

Optionally, the phase element and the wavelength conversion element are arranged independently of each other; or when the phase element and the wavelength conversion element are connected through a connecting piece or the phase element and the wavelength conversion element are integrally formed, arranging a balance element in a symmetrical area of the phase element on the wavelength conversion element; avoiding the shift of the center of gravity of the wavelength conversion element during rotation. The scattering region and the phase element may be stacked, and the balance element may not be provided in the stacked state.

In some embodiments, the light source system further comprises a first light splitting and combining element; the light beam generated by the light source is emitted into the wavelength conversion region through the first light splitting and combining element, the wavelength conversion region is excited by the light beam generated by the light source to generate an excited light beam, the excited light beam is reflected to the first light splitting and combining element, and the excited light beam is emitted into the light filtering region through the first light splitting and combining element to be filtered.

In some embodiments, the filter region includes a first filter region and a second filter region; the stimulated luminescence beam generated by the wavelength conversion region is reflected to the first light splitting and combining element, and is emitted into the first filtering region through the first light splitting and combining element to be filtered and then emitted out of the first color light; the stimulated luminescence beam generated by the wavelength conversion region is reflected to the first light-splitting and light-combining element, and is emitted into the second light-filtering region through the first light-splitting and light-combining element to be filtered and then emitted out of the second color light. The excited light beam, the first color light, and the second color light are not limited, and for example, the excited light beam is yellow light, the first color light may be red light, and the second color light may be green light.

In some embodiments, the wavelength-converting region comprises a first wavelength-converting region and a second wavelength-converting region, and the filtering region comprises a first filtering region and a second filtering region; the light beam generated by the light source is emitted into the first wavelength conversion region through the first light splitting and combining element, the first wavelength conversion region is excited by the light beam generated by the light source to generate a first excited light beam which is reflected to the first light splitting and combining element, and the first excited light beam is emitted into the first light filtering region through the first light splitting and combining element to filter and emit first color light; the light beam generated by the light source is emitted into the second wavelength conversion region through the first light splitting and combining element, the second wavelength conversion region is excited by the light beam generated by the light source to generate a second excited light beam which is reflected to the first light splitting and combining element, and the second excited light beam is emitted into the second light filtering region through the first light splitting and combining element to be filtered and emitted out of the second color light. The first excited light beam, the second excited light beam, the first color light and the second color light are not limited, for example, the first excited light beam can be red light, and the first color light can be red light; the second excited light beam may be green light and the second colored light may be green light.

In some embodiments, the light source system further comprises a second reflective element, a second light splitting and combining element, and a light homogenizing element; the light beam after the speckle suppression is injected into a light homogenizing element for homogenizing through a second light splitting and combining element; the filtered light beam is reflected to the second light splitting and combining element through the second reflecting element, and is emitted into the light homogenizing element through the second light splitting and combining element for homogenizing. Wherein the second reflective element may be a mirror or a reflective film coated element; the second light splitting and combining element has the characteristic of reflecting and transmitting light in different wavelength ranges; the light homogenizing element can be a compound eye, a Fresnel lens, a micro lens array, a light rod or the like.

For example, fig. 4 is a schematic structural diagram of a light source system provided in the present application. As shown in fig. 4, the light source system includes a light source 1, a first light-splitting and combining element 2, a first reflecting element 3, a wavelength converting element 4, a connector 5, a filter element 6, a second reflecting element 7, a second light-splitting and combining element 8, and a light homogenizing element 9. Wherein other elements such as the drive means are not shown.

1) If the light source 1 generates blue laser light.

When the light source system is required to generate blue light, the driving device drives the first diffusion region of the wavelength conversion element 4 to receive the light source 1 to generate blue laser; the blue laser generated by the light source 1 is transmitted through the first light splitting and combining element 2 and enters the first diffusion region of the wavelength conversion element 4 to carry out speckle suppression, and the beam after speckle suppression enters the first reflection element 3; the driving device drives the second diffusion region of the filter element 6 to receive the beam after speckle suppression, so that the beam after speckle suppression is reflected to the second diffusion region of the filter element 6 by the first reflecting element 3 to perform speckle suppression again, and the beam after speckle suppression again enters the second light splitting and combining element 8 and is reflected to the light homogenizing element 9 by the second light splitting and combining element 8 to perform light homogenization.

When the light source system is required to generate red light, the driving device drives the wavelength conversion region 4 of the wavelength conversion element to receive the light source 1 to generate blue laser; the light source 1 generates blue laser light, which is transmitted through the first light splitting and combining element 2 and enters the wavelength conversion region of the wavelength conversion element 4. The wavelength conversion region is a yellow phosphor that is excited by a light beam generated by the light source to generate yellow light and reflects the yellow light to the first light-splitting optical element. The driving device drives the first filter region of the filter element 6 to receive the yellow light, so that the yellow light is emitted into the first filter region of the filter element 6 through the first light splitting and combining element. The first filter region is a filter for filtering out red light, and the yellow light emits red light through the first filter region. The filtered red light is incident and reflected to the second light splitting and combining element 8 through the second light splitting and combining element 8, and is incident to the light homogenizing element 9 for homogenizing.

Or when the light source system is required to generate red light, the wavelength conversion element comprises a first wavelength conversion region and a second wavelength conversion region, the driving device drives the first wavelength conversion region of the wavelength conversion element 4 to receive the light source 1 to generate blue laser, and the first wavelength conversion region is red phosphor; the light source 1 generates blue laser light, which is transmitted through the first light splitting and combining element 2 and enters the first wavelength conversion region of the wavelength conversion element 4. The red phosphor is excited by a light beam generated by the light source to generate red light and reflects the red light to the first light splitting and combining element. The driving means drives the first filter region of the filter element 6 to receive the red light, so that the red light is incident into the first filter region of the filter element 6 through the first light splitting and combining element. The first filter region is a filter for filtering out red light, and the red light passes through the first filter region to emit purer red light. The filtered red light is incident and reflected to the second light splitting and combining element 8 through the second light splitting and combining element 8, and is incident to the light homogenizing element 9 for homogenizing.

When the light source system is required to generate green light, the driving device drives the wavelength conversion region 4 of the wavelength conversion element to receive the light source 1 to generate blue laser; the light source 1 generates blue laser light, which is transmitted through the first light splitting and combining element 2 and enters the wavelength conversion region of the wavelength conversion element 4. The wavelength conversion region is a yellow phosphor that is excited by a light beam generated by the light source to generate yellow light and reflected to the first light-dividing and light-combining element 2. The driving device drives the second filter region of the filter element 6 to receive the yellow light, so that the yellow light is emitted into the second filter region of the filter element 6 through the first light splitting and combining element. The second filter region is a filter for filtering out green light, and the yellow light emits green light through the second filter region. The filtered green light is incident and reflected to the second light splitting and combining element 8 by the second reflecting element 7, and is incident to the light homogenizing element 9 through the second light splitting and combining element 8 to be homogenized.

Or when the light source system is required to generate green light, the wavelength conversion element comprises a first wavelength conversion region and a second wavelength conversion region, the driving device drives the second wavelength conversion region of the wavelength conversion element 4 to receive the light source 1 to generate blue laser, and the second wavelength conversion region is green phosphor; the light source 1 generates blue laser light, which is transmitted through the first light splitting and combining element 2 and enters the second wavelength conversion region of the wavelength conversion element 4. The green phosphor is excited by a light beam generated by the light source to generate green light and reflected to the first light splitting and combining element. The driving means drives the second filter region of the filter element 6 to receive the green light, so that the green light is incident on the second filter region of the filter element 6 through the first light splitting and combining element. The second filter region is a filter for filtering out green light, and the green light passes through the second filter region to emit purer green light. The filtered green light is incident and reflected to the second light splitting and combining element 8 by the second reflecting element 7, and is incident to the light homogenizing element 9 through the second light splitting and combining element 8 to be homogenized.

2) If the light source 1 generates blue laser light and red laser light.

When the light source system is required to generate blue light or red light; the driving device drives the diffusion region of the wavelength conversion element 4 to receive the light source 1 to generate blue laser light or red laser light; the light source 1 generates blue laser or red laser, and the blue laser or the red laser is transmitted through the first light splitting and combining element 2 and is transmitted into the first diffusion region of the wavelength conversion element 4 to carry out speckle suppression, and the light beam after speckle suppression is transmitted into the first reflection element 3; the driving device drives the second diffusion region of the filter element 6 to receive the beam after speckle suppression, so that the beam after speckle suppression is reflected to the second diffusion region of the filter element 6 by the first reflecting element 3 to perform speckle suppression again, and the beam after speckle suppression again enters the second light splitting and combining element 8 and is reflected to the light homogenizing element 9 by the second light splitting and combining element 8 to perform light homogenization.

When the light source system is required to generate green light, the driving device drives the wavelength conversion region 4 of the wavelength conversion element to receive the blue laser generated by the light source 1, and the wavelength conversion region is green phosphor; the light source 1 generates blue laser light, which is transmitted through the first light splitting and combining element 2 and enters the wavelength conversion region of the wavelength conversion element 4. The green phosphor is excited by a light beam generated by the light source to generate green light and reflected to the first light splitting and combining element. The driving means drives the filter region of the filter element 6 to receive the green light, so that the green light is incident on the filter region of the filter element 6 through the first light splitting and combining element. The filter region is a filter for filtering out green light, which passes through the filter region to emit purer green light. The filtered green light is incident and reflected to the second light splitting and combining element 8 by the second reflecting element 7, and is incident to the light homogenizing element 9 through the second light splitting and combining element 8 to be homogenized.

3) If the light source 1 generates blue laser light and green laser light.

When the light source system is required to generate blue light or green light, the driving device drives the diffusion region of the wavelength conversion element 4 to receive the light source 1 to generate blue laser or green laser; the light source 1 generates blue laser or green laser, and the blue laser or the green laser is transmitted through the first light splitting and combining element 2 and is transmitted into the first diffusion region of the wavelength conversion element 4 to carry out speckle suppression, and the light beam after speckle suppression is transmitted into the first reflection element 3; the driving device drives the second diffusion region of the filter element 6 to receive the beam after speckle suppression, so that the beam after speckle suppression is reflected to the second diffusion region of the filter element 6 by the first reflecting element 3 to perform speckle suppression again, and the beam after speckle suppression again enters the second light splitting and combining element 8 and is reflected to the light homogenizing element 9 by the second light splitting and combining element 8 to perform light homogenization.

When the light source system is required to generate red light, the driving device drives the wavelength conversion region 4 of the wavelength conversion element to receive the blue laser generated by the light source 1, and the wavelength conversion region is a red phosphor or a yellow phosphor; the light source 1 generates blue laser light, which is transmitted through the first light splitting and combining element 2 and enters the wavelength conversion region of the wavelength conversion element 4. The red phosphor or the yellow phosphor is excited by a light beam generated by the light source to generate red light or yellow light and is reflected to the first light splitting and combining element. The driving device drives the filter region of the filter element 6 to receive the red light or the yellow light, so that the red light or the yellow light is emitted into the filter region of the filter element 6 through the first light splitting and combining element. The filter region is a filter for filtering out red light, and the red light or the yellow light emits purer red light through the filter region. The filtered red light is incident and reflected to the second light splitting and combining element 8 through the second light splitting and combining element 8, and is incident to the light homogenizing element 9 for homogenizing.

Fig. 5 is a schematic structural diagram of a light source system provided in the present application. As shown in fig. 4, the light source system includes a light source 1, a polarization splitting element 12, a phase element 10, a balance element 11, a wavelength conversion element 4, a connector 5, a filter element 6, a second reflection element 7, and a dodging element 9. Wherein other elements such as the drive means are not shown.

The light source 1 may generate blue laser light, or blue laser light and red laser light, or blue laser light and green laser light, or the like, and is described here only by way of example.

When the light source system is required to generate blue light, the driving device drives the first diffusion region of the wavelength conversion element 4 to receive the light source 1 to generate blue laser; the blue laser generated by the light source 1 emits light of a first polarization state (S state) through the polarization splitting element 12, and enters the phase element 11, the polarization state is converted into right-handed circular polarization through the phase element 11, then the light enters the first diffusion region of the wavelength conversion element 4 for speckle suppression, the polarization state is changed into left-handed circular polarization, and then the light is reflected back to the phase element 11 through the first diffusion region, and the light of a second polarization state (P state) is converted into light of a second polarization state by the phase element 11. The driving device drives the second diffusion region of the filter element 6 to receive the light with the second polarization state, so that the light with the second polarization state is injected into the second diffusion region through the polarization splitting element 12 for speckle suppression again. The light beam after the speckle suppression again enters the second light splitting and combining element 8, and is reflected to the light homogenizing element 9 by the second light splitting and combining element 8 to be homogenized.

When the light source system is required to generate red light or green light, reference may be made to the light source system shown in fig. 4, and the description thereof will not be repeated here.

Therefore, the diffusion area is added to carry out multiple speckle suppression processing on the light beam generated by the light source, and the stimulated luminescence is generated by combining the wavelength conversion element, so that speckle interference can be suppressed, and the projection equipment can realize high-brightness high-quality pictures. And the light path of the light source system is simple and the structure is compact.

The light source system of the present application may be applied to any application scene requiring composite light, including but not limited to projectors, such as single DLP projectors, triple DLP projectors.

The embodiment of the present application further provides a projection device, including the light source system related to the above embodiment, and the projection device further includes other components, such as a projection lens, where the arrangement of these components can be referred to the related art, and will not be described herein.

The terminology used in the embodiments of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in this application and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any or all possible combinations of one or more of the associated listed items. The character "/" herein generally indicates that the associated object is an "or" relationship.

The foregoing is merely specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily think about changes or substitutions within the technical scope of the present application, and the changes and substitutions are intended to be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A light source system comprising a light source, a wavelength converting element comprising a wavelength converting region and a first diffusion region, and a filter element comprising a filter region and a second diffusion region, wherein:

the filter region is used for filtering the stimulated luminescence beams generated by the wavelength conversion region.

2. The light source system of claim 1, further comprising a first light splitting and combining element and a first reflecting element;

and the light beam generated by the light source is emitted into the first diffusion region through the first light splitting and combining element to carry out speckle suppression, and the light beam after speckle suppression is reflected to the second diffusion region through the first reflecting element to carry out speckle suppression again.

3. The light source system of claim 1, further comprising a polarizing beam splitting element and a phase element;

the light beam generated by the light source is emitted out of the light with the first polarization state through the polarization beam splitting element and is emitted into the phase element, the light beam is emitted into the first diffusion area through the phase element to carry out speckle suppression, the light beam after speckle suppression is reflected back to the phase element through the first diffusion area, the light beam is converted into the light with the second polarization state through the phase element, and the light beam is emitted into the second diffusion area through the polarization beam splitting element to carry out speckle suppression again.

4. A light source system as recited in claim 3, wherein,

the phase element and the wavelength conversion element are arranged independently of each other;

or when the phase element and the wavelength conversion element are connected through a connecting piece or the phase element and the wavelength conversion element are integrally formed, a balance element is arranged in a symmetrical area of the phase element on the wavelength conversion element.

5. A light source system according to any one of claims 1-4, further comprising a first light splitting and combining element;

6. The light source system of claim 5, wherein the filter region comprises a first filter region and a second filter region;

the stimulated luminescence beam generated by the wavelength conversion region is reflected to the first light splitting and combining element, and is emitted into the first filtering region through the first light splitting and combining element to be filtered and then emitted into first color light;

the stimulated luminescence beam generated by the wavelength conversion region is reflected to the first light splitting and combining element, and is emitted into the second filtering region through the first light splitting and combining element to be filtered, and then second color light is emitted.

7. The light source system of claim 5, wherein the wavelength-converting region comprises a first wavelength-converting region and a second wavelength-converting region, and wherein the filter region comprises a first filter region and a second filter region;

the light beam generated by the light source is emitted into the first wavelength conversion region through the first light splitting and combining element, the first wavelength conversion region is excited by the light beam generated by the light source to generate a first excited light beam which is reflected to the first light splitting and combining element, and the first light beam is emitted into the first light filtering region through the first light splitting and combining element to filter and emit first color light;

the light beam generated by the light source is emitted into the second wavelength conversion region through the first light splitting and combining element, the second wavelength conversion region is excited by the light beam generated by the light source to generate a second excited light beam which is reflected to the first light splitting and combining element, and the second light beam is emitted into the second light filtering region through the first light splitting and combining element to be filtered and emitted out of second color light.

8. The light source system of claim 1, wherein the light beam generated by the light source comprises a first target color light beam and a second target color light beam;

the first diffusion area is used for carrying out speckle suppression on a first target color light beam and a second target color light beam generated by the light source;

the filter area is used for filtering the target excited light beam generated by the wavelength conversion area.

9. The light source system of claim 1, further comprising a second reflective element, a second light splitting element, and a light homogenizing element;

the light beam after speckle suppression is injected into the light homogenizing element through the second light splitting and combining element for homogenizing;

the filtered light beam is reflected to the second light splitting and combining element through the second reflecting element, and is injected into the light homogenizing element through the second light splitting and combining element for homogenizing.

10. A light source system according to claim 1, wherein the wavelength conversion element and the filter element are integrally formed, or the wavelength conversion element and the filter element are connected by a connector, the wavelength conversion element and the filter element corresponding to a driving device;

the driving device drives the wavelength conversion element to enable the light beam generated by the light source to enter the first diffusion region, and simultaneously drives the light filtering element to enable the light beam with the speckle of the first diffusion region restrained to enter the second diffusion region;

the driving device drives the wavelength conversion element to enable the light beam generated by the light source to enter the wavelength conversion region, and simultaneously drives the light filtering element to enable the excited light beam generated by the wavelength conversion element to enter the light filtering region.

11. A projection device comprising the light source system of any of claims 1-10.