CN202177773U - A light source system and a projection system using the light source system - Google Patents

Abstract

The utility model provides a light source system and a projection system applied thereto. The light source system includes a laser light source, used to generate the first light; a substrate, including at least one partition arranged on the propagation path of the first light; and an astigmatism structure of inorganic transparent material, arranged on at least one partition of the substrate, for Scatter the first ray. The light source system can be applied to a projection system. The utility model can homogenize the exciting light of the light source.

Description

Light source system and projection system for its application

【Technical field】

The utility model relates to a light source system, in particular to a lighting device and a light source system of a projection system.

【Background technique】

Solid-state light sources, such as laser diodes (LD, Lasor Diode), can generate high-brightness light, and have been widely used in various electronic products, such as in projection systems.

At present, the projection system can use the excitation light of the solid-state light source to form polychromatic light. The polychromatic light can be mixed through an optical integrator, and the mixed light can be focused onto the micro-display imager through a prism. The light modulated by the micro-display imager can be projected onto the display screen by the projection lens to form a multi-color image.

When the excitation light of the solid-state light source is used to form polychromatic light, the excitation light of the solid-state light source can pass through a color wheel to generate polychromatic light. However, due to the high energy concentration of the excitation light of the solid-state light source, that is, the high collimation of the excitation light, the polychromatic light passing through the color wheel tends to have uneven bright spots. Therefore, the excitation light of the untreated solid-state light source is difficult to To meet the requirements of the image display effect.

Therefore, it is necessary to provide a light source system and a projection system for its application to solve the problems existing in the prior art.

【Content of utility model】

The technical problem mainly solved by the utility model is to provide a light source system and a projection system applied thereto, so as to homogenize the light.

The main purpose of the utility model is to provide a light source system, which includes:

a laser light source for generating the first light;

a substrate including at least one partition disposed on the propagation path of the first light; and

The light-scattering structure of inorganic transparent material is arranged on the at least one subregion of the substrate, and is used for scattering the first light.

Another object of the present invention is to provide a projection system, which includes the above-mentioned light source system.

Preferably, the first light is excitation light, and the substrate includes a first subregion, and the first subregion includes a wavelength conversion material that absorbs part of the excitation light of the subregion and emits an excited light.

Preferably, the substrate includes a second subregion, the second subregion does not contain a wavelength conversion material, and the position of the light-scattering structure corresponds to the second subregion, and is used to scatter the excitation light on the second subregion.

Preferably, the light-scattering structure is a light-scattering sheet, the light-scattering sheet has a surface microstructure, and the light-scattering sheet is fixedly connected to the substrate.

Preferably, the surface microstructure is located on the side of the diffuser sheet facing the incident light of the laser light source, and the side of the diffuser sheet facing away from the incident light of the laser light source is a plane, which is attached to the on the surface of the substrate.

Preferably, the diffuser is made of glass.

Preferably, the substrate is made of an inorganic transparent material, the light astigmatism structure is a surface microstructure, and the light astigmatism structure is integrally formed on the surface of the substrate facing the incident light of the laser light source.

Preferably, the substrate is made of an inorganic transparent material, the light-scattering structure is light-scattering particles, and the light-scattering particles are scattered inside the substrate.

Preferably, the substrate further includes a reflective layer, and the reflective layer is disposed on a surface of the light-scattering structure facing away from the incident light of the laser light source.

Preferably, the substrate is allowed to move relative to the laser light source, so that each subregion of the substrate is located on the propagation path of the first light in turn.

Compared with the problem of high energy concentration of the excitation light of the existing solid-state light source, the light source system of the present invention and the projection system applied to it can effectively scatter the excitation light of the light source to homogenize the light and avoid the problem of uneven bright spots. Therefore, the light visual effect of the light source system and the image display effect of its application can be ensured.

In order to make the above-mentioned content of the present utility model more obvious and understandable, the preferred embodiments are specifically cited below, and in conjunction with the accompanying drawings, the detailed description is as follows:

【Description of drawings】

Fig. 1 is a schematic structural view of the first embodiment of the light source system of the present invention;

Fig. 2 is the front view of the circular substrate in the embodiment shown in Fig. 1;

Fig. 3 is a cross-sectional view of a circular substrate and an astigmatism structure in the embodiment shown in Fig. 1;

Fig. 4 is the structural representation of projection system in the utility model;

Fig. 5 is a schematic structural view of the second embodiment of the light source system of the present invention;

Fig. 6 is a schematic structural view of the third embodiment of the light source system of the present invention;

Fig. 7 is a schematic structural view of the fourth embodiment of the light source system of the present invention;

FIG. 8 is a schematic structural view of a fifth embodiment of the substrate of the present invention; and

Fig. 9 is a schematic structural view of the sixth embodiment of the light source system of the present invention.

【Detailed ways】

The following descriptions of the various embodiments refer to the accompanying drawings to illustrate specific embodiments in which the present invention can be implemented. The directional terms mentioned in the present invention, such as "up", "down", "front", "back", "left", "right", "inside", "outside", "side", etc., are only Refer to attached drawings for directions. Therefore, the used directional terms are used to illustrate and understand the present invention, but not to limit the present invention.

In the figures, structurally similar units are denoted by the same reference numerals.

Please refer to FIG. 1 , which is a schematic structural diagram of the first embodiment of the light source system of the present invention. The light source system 100 of this embodiment can be used to generate high-brightness polychromatic light, and can be used as a lighting device. The light source system 100 may include a light source 110 and a substrate 130 made of inorganic transparent material. The light source 110 is used for generating first light. The substrate 130 can be allowed to move relative to the laser light source 110, so that each subregion of the substrate 130 is located on the propagation path of the first light in turn.

As shown in Figure 1, the light source 110 of this embodiment can be a solid-state light source or a combination of multiple solid-state light sources, such as a laser diode (LD), a light emitting diode (LED, Light Emitting Diode) or other solid-state light sources, Used to generate excitation light. In this embodiment, the light source 110 can be a blue light LD, which can provide excitation light to the substrate 130 .

Please refer to FIG. 2 , which is a front view of the circular substrate in the embodiment shown in FIG. 1 . The substrate 130 in this embodiment is made of optically transparent materials, such as glass, PMMA plastic, and the like. The substrate 130 has a plurality of subregions 131, 132, 133 and 134, at least one (first subregion) of these subregions 131-134 comprises a wavelength converting material (not shown) for absorbing part of the excitation light of the subregion 131, And emit the stimulated light with a wavelength different from that of the excitation light, that is, other colored light other than blue light can be generated through the partitioned wavelength conversion material. The partitioned wavelength conversion material is preferably a phosphorescent material, such as a phosphor, a nanomaterial (such as a quantum dot), or the like. The wavelength conversion material can be deposited on the surface of the substrate 130 or doped into the material of the substrate 130 .

In this embodiment, the substrate 130 includes a second subregion, the second subregion does not contain a wavelength conversion material, and the location of the light-scattering structure corresponds to the second subregion, and is used to scatter the excitation light on the second subregion.

As shown in FIG. 2 , in this embodiment, the substrate 130 is, for example, a circular wheel, which rotates around the axis A, and the partitions 131-134 of the substrate 130 can sequentially surround the wheel. The rotation axis A is set, and the partitions 131 - 134 can be a blue partition 131 , a green partition 132 , a red partition 133 and a white partition 134 . In this embodiment, the light source 110 can emit excitation light, and the blue light subregion 131 (the second subregion) may not have a wavelength conversion material, so that the excitation light of the light source 110 can directly form blue light on the blue light subregion 131 . The wavelength conversion materials on the green light subregion 132, the red light subregion 133 and the white light subregion 134 preferably emit light in the wavelength ranges of 500-580nm, 580-700nm, and 480-700nm, respectively, so that the excitation light of the light source 110 can be distributed in the green light subregion 132 respectively. , the red light subregion 133 and the white light subregion 134 are up-converted into green light, red light and white light. When the substrate 130 is rotated around the rotation axis A, the substrate 130 can be rotated relative to the light source 110, so that different partitions 131-134 are exposed to the excitation light at different times, so that different regions 131-134 can be sequentially emitted by the rotating substrate 130. The shade of color.

In other embodiments, the substrate 130 may have fewer (eg, two or three) or more (eg, 8) partitions. The substrate 130 may also have only one blue-light partition, and at this time, the substrate does not need to move relative to the light source 110, as long as the blue-light partition can be arranged on the propagation path of the exciting light. When the substrate has at least two partitions, the substrate may not move relative to the light source 110, and multiple light sources are used to correspond to the partitions of the substrate. For example, a blue light source is set correspondingly to the blue partitions of the substrate to obtain blue light, and an ultraviolet light source Set corresponding to the red light division of the substrate to obtain red light.

As shown in FIG. 1 , the substrate 130 of this embodiment includes a light-scattering structure 135 to scatter the excitation light of the light source 110 so that the excitation light of the light source 110 can be sufficiently scattered to form uniform colored light. In this embodiment, the light-scattering structure 135 is a light-scattering sheet, which has a surface microstructure (not shown), such as a matte structure or a scattering point structure, so as to homogenize the excitation light of the light source 110 and reduce the irregularity of the light output from the substrate 130. Even (Mura) phenomenon. The diffuser is fixedly connected to the substrate 130 , and the surface microstructures can be formed on one or both sides of the diffuser to refract and reflect the excitation light of the light source 110 to achieve the astigmatic effect. Since the excitation light of the light source 110 can have extremely high energy density, the diffuser is preferably made of inorganic transparent materials, such as glass. Wherein, the manufacturing method of the surface microstructure of the astigmatism sheet may include molding after heating and softening, chemical etching or sand blasting.

As shown in FIG. 1 and FIG. 2 , in this embodiment, the light source 110 can emit excitation light, for example, and the blue light subregion 131 may not have a wavelength conversion material. At this time, the light-scattering structure 135 is arranged on the blue-light subregion 131 for astigmatism. The surface microstructure of the astigmatism sheet (scattering structure) 135 is located on the side of the astigmatism sheet facing the incident light of the laser light source 110, and the side of the astigmatism sheet facing away from the incident light of the laser light source 110 is a plane, which is attached to the surface of the substrate 130. On the surface, at this time, the light exit side plane of the diffuser 135 is preferably located at or near the focus of the excitation light. When the excitation light from the light source 110 is incident on the substrate 130, the excitation light from the light source 110 can first strike the surface microstructure of the diffuser sheet, and diffuse light through the surface microstructure, and then the scattered light can pass through the substrate 130, and Form a color light with uniform energy distribution.

Please refer to FIG. 3 and FIG. 4 . FIG. 3 is a cross-sectional view of the area of the circular substrate in the embodiment shown in FIG. 1 provided with the light-scattering structure, and FIG. 4 is a schematic structural diagram of the projection system in the present invention. The light source system 100 of this embodiment can be applied to a projection system. At this time, the projection system can include a light source 110, a focusing optical assembly 120, a substrate 130, an optical integrator 150, an optical relay or collecting device 160, and a prism 170. , a micro-display imager (micro-display imager) 180 and a projection lens 190. The focusing optical component 120 is used to focus the excitation light onto a small area of the substrate 130, the excitation light from the light source 110 can pass through the substrate 130 to form polychromatic light, wherein the substrate 130 includes a light scattering structure 135 to scatter the excitation of the light source 110 Light. This polychromatic light passing through the substrate 130 may then pass through an optical integrator 150 for intensity averaging (mixing). Optical relay 160 may focus the mixed light through prism 170 onto microdisplay imager 180 . The light modulated by the micro-display imager 180 can be projected onto the display screen by the projection lens 190, and a multi-color image can be realized through the synchronous operation between the micro-display imager 180 and the substrate 130, wherein the micro-display imager 180 and the substrate The synchronous operation between 130 can be controlled by a signal processor (not shown).

Please refer to FIG. 5 , which is a schematic structural diagram of a second embodiment of the light source system of the present invention. The light source system 200 of the second embodiment may include a light source 210 and a substrate 230 . The light source 210 is used to generate excitation light, and the substrate 230 is supported to move so that different regions of the substrate 230 are exposed to the excitation light at different times. The base plate 230 is, for example, a circular wheel, and the wheel rotates around the axis A. As shown in FIG. In the second embodiment, the substrate 230 is, for example, made of inorganic transparent material, such as glass. At this time, the light-scattering structure 235 of the substrate 230 may be integrally formed on the surface of the substrate 230 . For example, the light scattering structure 235 can be a surface microstructure integrally formed on the surface of the substrate 230 facing the incident light of the laser light source 210 to scatter the excitation light of the light source 210 .

Please refer to FIG. 6 , which is a schematic structural diagram of a third embodiment of the light source system of the present invention. The light source system 300 of the third embodiment may include a light source 310 and a substrate 330 . The base plate 330 is, for example, a circular wheel, and the wheel rotates around the axis A. As shown in FIG. The substrate 310 is made of an inorganic transparent material, and the light-scattering structure 335 of the substrate 330 can be light-scattering particles, which can be dispersed inside the substrate 330 to scatter the excitation light of the light source 310 . The light-scattering structure 335 can be tiny particles with different refractive indices or opaque, which are doped in the substrate 330 . For example, the material of the substrate 330 can be glass with a refractive index of 1.51, and the light-scattering structure 335 can be titanium dioxide particles with a refractive index of 2.36. When the excitation light from the light source 310 propagates in the substrate 330 , the light incident on the interface between the glass and the titanium dioxide will be refracted and reflected, and then scattered.

Please refer to FIG. 7 , which is a schematic structural diagram of a fourth embodiment of the light source system of the present invention. The light source system 400 of the fourth embodiment may include a light source 410 and a substrate 430 . The light source 410 is used to generate excitation light, and the substrate 430 is supported to move so that different regions of the substrate 430 are exposed to the excitation light at different times. The base plate 430 is, for example, a circular wheel, and the wheel rotates around the rotation axis A. As shown in FIG. In the fourth embodiment, the substrate 430 has a reflective layer 436, such as a reflective film or a mirror, which can be disposed on one side surface of the substrate 430 and located on the side surface of the light-scattering structure 435 facing away from the incident light of the laser light source 410 , used to reflect a light incident on the substrate 430 . At this time, the light-scattering structure 435 of the substrate 430 may be a light-scattering sheet or light-scattering particles to scatter the excitation light of the light source 410 . When the excitation light from the light source 410 is incident on the light-scattering structure 435, part of the light is directly reflected by the light-scattering structure 435, and the transmitted light is incident on the reflective layer 436 for reflection, and is emitted from the incident surface of the substrate 430 after being scattered by the light-scattering structure 435 once. .

Please refer to FIG. 8 , which is a schematic structural diagram of a fifth embodiment of the substrate of the present invention. In the fifth embodiment, the substrate 530 of the light source system has two subregions 531 and 532, the subregion 531 may not have a wavelength conversion material, and the subregion 532 may have a wavelength conversion material for converting the light wavelength of the light source 510 to obtain a wavelength different from that of the light source. 510 shades of excitation light. The light-scattering structure 535 of the substrate 530 can be disposed on the partition 531 . In this embodiment, the light source 510 emits excitation light, for example, and the partition 532 can convert the excitation light into green light, and the light source system of the fifth embodiment may include another light source (not shown) for providing another different light source. For colored light in the wavelength range, the other light source is, for example, a red LED for emitting red light.

Please refer to FIG. 9 , which is a schematic structural diagram of a sixth embodiment of the light source system of the present invention. The light source system 600 of the sixth embodiment may include a light source 610 , a focusing optical component 620 and a substrate 630 . The light source 610 is used to generate excitation light, and the focusing optical assembly 620 is used to focus the excitation light onto a small area of the substrate 630. The substrate 630 is supported to move so that different regions of the substrate 630 are exposed at different times. for excitation light, and the substrate 630 includes a light-scattering structure 635 for scattering the excitation light of the light source 610 . In the sixth embodiment, the substrate 630 may be a rectangular moving plate, and the partitions 631 , 632 and 633 of different colors are arranged linearly on the substrate 630 . When the rectangular substrate 630 vibrates linearly, the subregions 631 , 632 and 633 can be alternately excited and generate alternate colors of light. The light-scattering structure 635 can be disposed on the partition 631 to scatter the excitation light of the light source 610 .

It can be seen from the above that the light source system of the present invention and the projection system applied thereto can use the astigmatism structure of the substrate to scatter the exciting light of the light source to homogenize the light, thus ensuring the light visual effect of the light source system and the projection system applied thereto. Image display effect.

In summary, although the present utility model has been disclosed as above with preferred embodiments, the above preferred embodiments are not intended to limit the present utility model, and those of ordinary skill in the art may, without departing from the spirit and scope of the present utility model, Various changes and modifications can be made, so the scope of protection of the present utility model is defined by the claims.

Claims (11)

1. light-source system, it is characterized in that: said light-source system comprises:

LASER Light Source is used to produce first light;

Substrate comprises at least one subregion on the travel path that is arranged at said first light; And

The astigmatic structure of inorganic transparent material is located on said at least one subregion of said substrate, is used for scattering first light.

2. light-source system according to claim 1 is characterized in that: said first light is exciting light, and said substrate comprises first subregion, and said first subregion comprises the said exciting light of the part that absorbs this subregion and sends the material for transformation of wave length of a Stimulated Light.

3. light-source system according to claim 1; It is characterized in that: said substrate comprises second subregion; Said second subregion does not comprise material for transformation of wave length, and the position of said astigmatic structure is corresponding with said second subregion, in order to the exciting light on said second subregion of scattering.

4. light-source system according to claim 3 is characterized in that: said astigmatic structure is a scattering sheet, and said scattering sheet has surface micro-structure, and said scattering sheet is fixedly connected on the said substrate.

5. light-source system according to claim 4; It is characterized in that: said surface micro-structure is positioned at the side towards said LASER Light Source incident light of said scattering sheet; And a side of the said dorsad LASER Light Source incident light of said scattering sheet is a plane, and this plane fits on the surface of said substrate.

6. light-source system according to claim 4 is characterized in that: said scattering sheet is a glass material.

7. light-source system according to claim 3 is characterized in that: said substrate is the inorganic transparent material, and said astigmatic structure is a surface micro-structure, and said astigmatic structure is shaped in said real estate on the surface of said LASER Light Source incident light.

8. light-source system according to claim 3 is characterized in that: said substrate is the inorganic transparent material, and said astigmatic structure is astigmatic particle, and said astigmatic particulate dispersion is in the inside of said substrate.

9. light-source system according to claim 3 is characterized in that: said substrate also comprises a reflection horizon, and said reflection horizon is arranged on the side surface of said dorsad LASER Light Source incident light of astigmatic structure.

10. according to each described light-source system in the claim 1 to 9, it is characterized in that: said substrate allows with respect to said LASER Light Source motion, so that each subregion of said substrate is positioned on the travel path of first light in turn.

11. an optical projection system is characterized in that: said optical projection system comprises like each described light-source system in the claim 1 to 10.

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