CN112711169B - Illumination system and projection device - Google Patents

Abstract

An illumination system includes at least one light source, at least one optical element, a carrying module and a light homogenizing element. At least one light source is used to provide at least one light beam. At least one optical element is disposed on the transmission path of at least one light beam. At least one optical element has an alignment edge. The carrying module is used for carrying at least one optical element. The carrier module includes a positioning portion. The light incident surface of the homogenizing element has a long side and a short side, which are used for at least one beam to pass through to form an illumination beam, wherein the bearing module is arranged between the at least one light source and the homogenizing element, and the alignment side is adapted to the positioning portion, And the alignment side is not parallel to the short side of the light incident surface. The present invention also provides a projection device including the above-mentioned lighting system. The illumination system and the projection device provided by the present invention can shorten the time of assembly and optical calibration, and avoid the rotation of the optical element in the carrying module, thereby improving the optical quality.

Description

Lighting system and projection device

technical field

The present invention relates to an optical element and an optical device, and in particular, to an illumination system and a projection device.

Background technique

A projection device is a display device used to generate large-scale images. With the evolution and innovation of science and technology, it is constantly improving. The imaging principle of the projection device is to convert the illumination beam generated by the illumination system into an image beam through a light valve, and then project the image beam to the projection target (such as a screen or a wall) through a projection lens to form a projection image.

In addition, the lighting system has also changed from ultra-high-performance lamp (UHP lamp), light-emitting diode (Light- emitting diode, LED), has evolved to the most advanced laser diode (laser diode, LD) light source. However, in the lighting system, the current cost-effective way of generating red and blue light from the light source is to use a blue laser diode to emit an excitation beam to the fluorescent color wheel, and use the excitation beam to excite the phosphors of the fluorescent color wheel to generate converted light, and then filter the light. The light element filters out the desired red or green light for use.

However, in the known lighting system architecture, the polarization polarity of the excitation beam after entering the projection device will be destroyed by the optical components inside the projection device, so that the polarization direction and intensity of the laser light become scattered and different, which in turn causes the light of the display screen to be scattered. The problem of uneven brightness. Therefore, if the projection device generates a stereoscopic image display screen in the polarized stereoscopic mode (the lens is attached with a polarizer), the image projected from the lens and the polarizer will have uneven color or uneven brightness and darkness.

The “Background Art” paragraph is only used to help understand the present disclosure, so the content disclosed in the “Background Art” paragraph may contain some known technologies that are not known to those skilled in the art. The content disclosed in the "Background Art" paragraph does not represent the content or the problem to be solved by one or more embodiments of the present invention, and has been known or recognized by those skilled in the art before the present invention is filed.

SUMMARY OF THE INVENTION

The present invention provides an illumination system and a projection device, which can shorten the time of assembly and optical calibration, and avoid the rotation of the optical element in the carrying module, thereby improving the optical quality.

Other objects and advantages of the present invention can be further understood from the technical features disclosed in the present invention.

In order to achieve one or part or all of the above purposes or other purposes, an embodiment of the present invention provides a lighting system, including at least one light source, at least one optical element, a carrying module, and a light homogenizing element, wherein at least one light source is used for At least one light beam is provided, at least one optical element is arranged on the transmission path of at least one light beam, at least one optical element has an alignment edge, the carrying module is used to carry at least one optical element, the carrying module includes a positioning part, and the light incident of the uniform light element is The surface has a long side and a short side, which are used for at least one beam to pass through to form an illumination beam, wherein the carrying module is arranged between at least one light source and the uniform light element, the alignment side is adapted to the positioning portion, and the alignment side is not parallel. on the short side of the incident surface.

To achieve one or part or all of the above objectives or other objectives, another embodiment of the present invention provides a projection device. The projection device includes an illumination system, at least one light valve and a projection lens. The lighting system includes at least one light source, at least one optical element, a carrier module and a light homogenizing element, wherein at least one light source is used to provide at least one light beam, at least one optical element is arranged on the transmission path of at least one light beam, and at least one optical element has a pair of The position edge, the carrying module is used to carry at least one optical element, the carrying module includes a positioning part, and the light incident surface of the dodging element has a long side and a short side for allowing at least one light beam to pass through to form an illuminating light beam. At least one light valve is disposed on the transmission path of the illumination beam, and is used for converting the illumination beam into an image beam. The projection lens is arranged on the transmission path of the image beam and is used for converting the image beam into a projection beam, wherein the bearing module is arranged between at least one light source and the light-dimming element, the alignment edge is adapted to the positioning part, and the alignment edge is not parallel on the short side of the incident surface.

Based on the above, the embodiments of the present invention have at least one of the following advantages or effects. In the projection device of the present invention, the illumination system includes at least one optical element and a carrier module supporting the at least one optical element, wherein the at least one optical element has an alignment edge, and the carrier module includes a positioning portion adapted to the alignment edge. In this way, the optical element designed with the alignment edge can be easily assembled and optically aligned by fitting with the positioning portion of the carrier module, thereby shortening the assembly and optical alignment time. In addition, the design of the mutually adapted alignment edge and the positioning portion can prevent the optical element from rotating in the carrier module, thereby improving the optical quality. On the other hand, the alignment side of the at least one optical element is not parallel to the short side of the light incident surface of the uniform light element in the illumination system. Therefore, the volume of the optical element can be reduced, and at the same time, the light beam passing through the optical element can be completely transmitted into the light incident surface of the homogenizing element, thereby avoiding the loss of light energy. In addition, the long side of the light incident surface of the homogenizing element can have a larger distance from the boundary of the optical element, so that the optical effect will not be lost by the scattering caused by the boundary of the optical element.

In order to make the above-mentioned features and advantages of the present invention more obvious and easy to understand, the following embodiments are given and described in detail with the accompanying drawings as follows.

Description of drawings

FIG. 1 is a schematic diagram of a projection apparatus according to an embodiment of the present invention.

2 is a schematic cross-sectional view of a part of a lighting system according to an embodiment of the present invention.

3A and 3B are schematic diagrams of different optical elements, respectively.

FIG. 3C is a schematic diagram of the superposition of different optical elements in FIGS. 3A and 3B .

FIG. 4 is a schematic diagram of a part of a lighting system according to an embodiment of the present invention.

FIG. 5 is an exploded schematic view of a portion of the lighting system of FIG. 4 .

FIG. 6 is a schematic diagram of the carrier module of FIG. 4 .

FIG. 7 is a schematic diagram of a part of a lighting system according to another embodiment of the present invention.

FIG. 8 is an exploded schematic view of a portion of the lighting system of FIG. 7 .

Detailed ways

The foregoing and other technical contents, features and effects of the present invention will be clearly presented in the following detailed description of a preferred embodiment with reference to the accompanying drawings. The directional terms mentioned in the following embodiments, such as: up, down, left, right, front or rear, etc., are only referring to the directions of the drawings. Accordingly, the directional terms used are illustrative and not limiting of the present invention.

FIG. 1 is a schematic diagram of a projection apparatus according to an embodiment of the present invention. Please refer to FIG. 1 , in this embodiment, the projection device 10 is used for providing the projection light beam LP. Specifically, the projection device 10 includes an illumination system 100 , at least one light valve 50 and a projection lens 60 , and the illumination system 100 is used to provide an illumination light beam LB. The light valve 50 is disposed on the transmission path of the illumination light beam LB, and is used for converting the illumination light beam LB into at least one image light beam LI. The so-called illumination light beam LB refers to the light beam provided by the illumination system 100 to the light valve 50 in sequence. The projection lens 60 is disposed on the transmission path of the image beam LI, and is used for converting the image beam LI into a projection beam LP, and the projection beam LP is used to be projected on a projection target (not shown), such as a screen or a wall.

In the technology applied to stereoscopic display, the projection device 10 of this embodiment can be applied as a polarized stereoscopic image projector. Specifically, when two projection devices 10 are used in the polarization stereo mode (ie, a polarizer is arranged outside the projection lens 60 or a polarizer is built in the projection device 10 ), the two projection devices 10 can be used to respectively provide the projection light beams LP to pass through respectively. The polarizer is used to generate images of different polarization states, so that the user can observe the three-dimensional display screen through the polarized stereo glasses. A polarizing element, and the two polarizing elements correspond to the image screen of the polarization state generated by the polarizer of the projection device, so that the left and right eyes of the user respectively receive the image screen projected by the corresponding projector, thereby achieving the effect of stereoscopic display.

In detail, in this embodiment, the light valve 50 is, for example, a reflective light modulator such as a Liquid Crystal On Silicon panel (LCoS panel), a Digital Micro-mirror Device (DMD). In some embodiments, the light valve 50 may also be a transparent liquid crystal panel (Transparent Liquid Crystal Panel), an electro-optical modulator (Electro-Optical Modulator), a magneto-optical modulator (Maganeto-Optic modulator), acousto-optic modulator (Acousto-Optic Modulator, AOM) and other transmissive optical modulators. The present invention does not limit the type and type of the light valve 50 . The detailed steps and implementation of the method for the light valve 50 to convert the illuminating light beam LB into the image light beam LI can be adequately taught, suggested and implemented by common knowledge in the technical field, and thus will not be repeated here. In this embodiment, the number of light valves 50 is one, for example, the projection device 10 using a single digital micromirror element (1-DMD), but in other embodiments, there may be more than one, and the present invention is not limited to this.

The projection lens 60 includes, for example, a combination of one or more optical lenses having dioptric powers, such as various combinations of non-planar lenses such as biconcave lenses, biconvex lenses, meniscus lenses, convex-concave lenses, plano-convex lenses, and plano-concave lenses. In one embodiment, the projection lens 60 may also include a flat optical lens, which converts the image beam L from the light valve 50 into a projection beam LP in a reflective or penetrating manner, and the projection beam LP is used to be projected to a projection target, such as screen or wall. The present invention does not limit the type and type of the projection lens 60 .

In addition, in some embodiments, the projection device 10 may optionally include optical elements with condensing, refraction or reflection functions to guide the illumination light beam LB emitted by the illumination system 100 to the light valve 50 and to direct the light The image light beam LI emitted by the valve 50 is guided to the projection lens 60 to generate the projection light beam LP, but the present invention is not limited thereto.

The lighting system 100 includes at least one light source 110 , at least one optical element 120 , a carrying module 130 and a light homogenizing element 140 . Specifically, the lighting system 100 further includes a wavelength converting element 150 , at least one light splitting element 160 , at least one reflecting element 170 and a filter device 180 . In different embodiments, the types and quantities of the wavelength conversion element 150 , the light splitting element 160 , the reflection element 170 and the filter device 180 can be changed according to different types of illumination systems 100 , which are not limited in the present invention.

The light source 110 is used for providing at least one light beam L. In detail, the light source 110 includes an excitation light source 112 and an auxiliary light source 114, wherein the excitation light source 112 provides the excitation light beam L1, and the auxiliary light source 114 provides the auxiliary light beam L2. In this embodiment, the excitation light source 112 is a laser diode (LD) capable of emitting a blue excitation beam, and the auxiliary light source 114 is a laser diode capable of emitting a red excitation beam or a light emitting diode (LED) capable of emitting a red beam. In other words, in this embodiment, the light sources 110 are all laser light emitting devices.

The wavelength conversion element 150 is disposed on the transmission path of the excitation light beam L1 and is located between the excitation light source 112 and the light homogenizing element 140 . The wavelength conversion element 150 has a first region and a second region. The excitation light beam L1 is irradiated to the first region and the second region of the wavelength conversion element 150 in sequence. The first region of the wavelength converting element 150 has a wavelength converting material to convert the excitation light beam L1 into the excited light beam L3 and reflect the excited light beam L3 toward the excitation light source 112 . In this embodiment, for example, the blue excitation light beam is converted into a green light beam or a yellow light beam or a yellow-green light beam. The second region of the wavelength conversion element 150 has a light-transmitting element (eg, a glass sheet) or an opening for allowing the excitation light beam L1 to pass through the wavelength conversion element 150 . In different embodiments, the configuration of the wavelength converting material in the first region of the wavelength converting element 150 may vary according to different types of illumination systems 100 . The second region of the wavelength conversion element 150 has a reflective element (eg, a metal sheet with a reflective coating) for reflecting the excitation beam L1. The present invention does not limit the configuration and type of the wavelength conversion element 150 .

At least one light splitting element 160 is disposed on the transmission path of the excitation light beam L1 or the auxiliary light beam L2, and at least one reflecting element 170 is used to reflect or transmit the light beam. For example, in this embodiment, one of the light splitting elements 160 is disposed between the excitation light source 112 and the wavelength conversion element 150 . The at least one light splitting element 160 of the other one is disposed between the auxiliary light source 114 and the at least one light splitting element 160 of one of them. In detail, the at least one light splitting element 160 includes a Dichroic Mirror with Green and Orange reflect (DMGO) and a Dichroic Mirror with Blue reflect (DMB), wherein the Green and Orange reflector (Fig. 1. The right beam splitting element 160) is located between the excitation light source 112 and the wavelength conversion element 150 to reflect the excited beam L3 and allow the excitation beam L1 and the auxiliary beam L2 to pass through, so that all the required beams are collected and transmitted to at least one optical beam element 120 . The reflecting blue light beam splitter (the beam splitter element 160 on the left in FIG. 1 ) is located between the auxiliary light source 114 and the beam splitter element 160 on the right side in FIG. 1 , for reflecting the excitation beam L1 and allowing the auxiliary beam L2 to penetrate.

In other embodiments, a wedge-shaped light-transmitting component (not shown) may be disposed between the excitation light source 112 and the light-splitting component 160 on the right side of FIG. size, so that the intensity of the excitation beam L1 is not too concentrated, so as to prevent the wavelength conversion component 150 from being damaged due to high temperature. For example, the wedge-shaped light-transmitting component is made of glass, not a birefringent material.

The filter device 180 is disposed between the light splitting element 160 and the at least one optical element 120, and has filters of different colors to allow the excitation light beam L1, the auxiliary light beam L2 and the excited light beam L3 to pass through in sequence so as to correspond to the blue light portion of the illumination light beam LB. , the red part and the green part. In other embodiments, the filter device 180 may be disposed between the at least one optical element 120 and the light homogenizing element 140 . Specifically, in this embodiment, the filter device 180 is a rotatable color wheel device, which is used to filter the excitation light beam L1 , the auxiliary light beam L2 or the excited light beam L3 in sequence, so that the filter can pass through the filter. The color purity of the light beam of the light device 180 is increased. In different embodiments, the configuration of the filters of different colors in the filter device 180 can be changed according to different types of lighting systems 100 , and the present invention does not limit the configuration and type of the filter device 180 .

The homogenizing element 140 is used for passing the excitation light beam L1 , the auxiliary light beam L2 and the excited light beam L3 to form the illumination light beam LB. That is, the homogenizing element 140 is disposed on the transmission path of the excitation light beam L1, the auxiliary light beam L2 and the excited light beam L3, so as to adjust the spot shape of the above-mentioned light beams, so that the spot shape of the illumination beam LB emitted from the homogenizing element 140 is It can match the shape of the working area (active area) of the light valve 50 (for example, a rectangle), and make the light spot have the same or similar light intensity everywhere. The light incident surface S of the homogenizing element 140 has a long side and a short side (see the long side D1 and the short side D2 in FIG. 3C ) for allowing at least one light beam L to pass through to form the illumination light beam LB. In this embodiment, the homogenizing element 140 is, for example, an integrator cylinder, but in other embodiments, the homogenizing element 140 may also be an optical element of other suitable types, such as a lens array, and the present invention is not limited thereto.

2 is a schematic cross-sectional view of a part of a lighting system according to an embodiment of the present invention. Please refer to Figure 1 and Figure 2. For the convenience of description, the light source 110 and the light beam L shown in FIG. 2 are only shown schematically, but the part of the illumination system 100 shown in FIG. 2 can be applied to at least the projection device 10 shown in FIG. limited to this. Therefore, the illumination system 100 applied to the projection device 10 will be described below. The at least one optical element 120 is disposed on the transmission path of the at least one light beam L, and is located between the light source 110 and the light homogenizing element 140 .

3A and 3B are schematic diagrams of different optical elements, respectively. FIG. 3C is a schematic diagram of the superposition of different optical elements in FIGS. 3A and 3B . Please refer to FIG. 2, FIG. 3A to FIG. 3C. In this embodiment, the at least one optical element 120 is, for example, a depolarizer, which is used to homogenize the polarization state of the light beam. Specifically, the number of the at least one optical element is two, that is, the two optical elements 122 and 124 having birefringence characteristics. The optical axis A1 of the optical element 122 is not parallel to the optical axis A2 of the optical element 124 . For example, in this embodiment, the included angle between the optical axis A1 of the optical element 122 and the optical axis A2 of the optical element 124 is between 40 degrees and 50 degrees, but the invention is not limited thereto.

Referring to FIG. 2 , in terms of structural geometry, in this embodiment, the optical element 122 and the optical element 124 respectively have non-parallel light incident surfaces and light exit surfaces, and the optical element 124 is disposed on the optical element 122 and the light homogenizing element 140 . between. Wherein, the optically effective area of the optical element 120 (the area of the optical element through which the light beam passes) is greater than the optically effective area of the light incident surface of the light-diffusing element 140 . The light emitting surface of the optical element 122 is parallel to the light incident surface of the optical element 124 , the light incident surface of the optical element 122 is parallel to the light emitting surface of the optical element 124 , and the light incident surface of the optical element 122 is perpendicular to the incident direction of the light beam L. Therefore, from a side view, the shape of the optical element 122 and the shape of the optical element 124 are geometrically symmetrical. interval, as shown in Figure 2.

The material of the optical element 122 is different from the material of the optical element 124 in terms of the material configuration of the structure. In this embodiment, the optical element 122 is made of a material with birefringence properties, such as quartz crystal. The optical element 124 is made of a material having a similar refractive index to that of the optical element 122, such as fused silica. However, in some embodiments, the optical element 124 may also be a quartz crystal with an optical axis direction different from that of the optical element 122, or may be other materials, and the present invention is not limited thereto. In this embodiment, the lighting system 100 may further include a focusing element 190 disposed on the transmission path of the light beam L and located between the light source 110 and the at least one optical element 120 . The focusing element 190 is, for example, a focusing lens, which is used for focusing the light beam L so that the light beam L can be collected by the uniform light element 140 after passing through the optical element 120 . In this way, when the projection device 10 displays a stereoscopic image, the color or brightness of the display image can be uniform, so that the user can observe the stereoscopic display image with better uniformity.

FIG. 4 is a schematic diagram of a part of a lighting system according to an embodiment of the present invention. FIG. 5 is an exploded schematic view of a portion of the lighting system of FIG. 4 . FIG. 6 is a schematic diagram of the carrier module of FIG. 4 . Please refer to FIGS. 3A to 6 . The carrying module 130 is used for carrying at least one optical element 120 . In this embodiment, the optical element 120 has an alignment edge C, and the carrier module 130 includes a positioning portion 132 having a structural shape that can adapt to the alignment edge C, such as a planar inner wall. The carrier module 130 is disposed between at least one light source 110 and the homogenizing element 140 (as shown in FIG. 1 ), and the alignment edge C of the optical element 120 is adapted to the positioning portion 132 of the carrier module 130 . More specifically, in this embodiment, the optical element 122 has an alignment edge C1 , and the optical element 124 has an alignment edge C2 , and the alignment edges C1 and C2 are both adapted to the positioning portion 132 of the carrier module 130 . In this way, the optical element 120 designed with the alignment edge C can be easily assembled and optically aligned by fitting with the positioning portion 132 of the carrier module 130 , thereby shortening the assembly and optical alignment time. In addition, the design of the aligning edge C and the positioning portion 132 that are adapted to each other can prevent the optical element 120 from rotating in the carrying module 130, thereby improving the optical quality.

It is worth mentioning that, referring to FIG. 3C , the alignment side C is not parallel to the short side D2 of the light incident surface S of the light-diffusing element 140 . For example, in this embodiment, the alignment side C of the optical element 120 is parallel to the long side D1 of the light incident surface S of the light-diffusing element 140 , but the present invention is not limited thereto. Therefore, the volume of the optical element 120 can be reduced, and at the same time, the light beam L passing through the optical element 120 can be completely transmitted into the light incident surface S of the homogenizing element 140 to avoid light energy loss. In addition, the long side D1 of the light incident surface S of the homogenizing element 140 can have a larger distance from the boundary of the optical element 120 , so that the optical effect will not be lost by the scattering caused by the boundary of the optical element 120 . In one embodiment, referring to FIGS. 3A , 3B and 3C , the alignment edge C of at least one optical element 120 is parallel to the long side D1 of the light incident surface S of the homogenizing element 140 and the optical axis A1 of the optical element 122 . The alignment edge C of at least one optical element 120 is not parallel to the optical axis A2 of the optical element 124 .

Specifically, the carrier module 130 further includes a carrier portion 134 and an inner wall E. The carrier portion 134 is used to carry the optical element 120 , and there is a distance between the inner wall E and the optical element 120 , that is, the optical element 120 is not placed in the carrier module 130 . Will be in contact with the inner wall E, which helps absorb manufacturing tolerances and facilitates assembly. The inner wall E surrounds the bearing portion 134 to form a first opening O1 , and the area of the first opening O1 is larger than that of the optical element 120 (ie, the two optical elements 122 and 124 ). In addition, the carrying portion 134 has a second opening O2 for allowing the light beam L to pass through. Since the second opening O2 is formed by the carrying portion 134 , the area of the second opening O2 is smaller than that of the optical element 120 . Therefore, the optical element 120 can be disposed on the bearing portion 134 in the inner wall E (and the first opening O1 ).

In addition, in this embodiment, the carrying module 130 further includes a plurality of abutting portions 136 protruding from the inner wall E. A plurality of abutting portions 136 are used for abutting and clamping the optical element 120 , as shown in FIG. 4 . In other words, compared with the limiting function of the inner wall E, the abutting portion 136 also provides a clamping effect in an abutting manner. The connecting portion 136 can effectively eliminate the structural tolerance caused by assembly, and the part of the optical element 120 that is not in contact with the abutting portion 136 can also facilitate the operator to assemble or disassemble. Therefore, the stability of the optical element 120 in the carrier module 130 can be further increased, thereby improving the optical quality.

In addition, in this embodiment, the carrier module 130 further includes a spacer G disposed between the two optical elements 122 and 124 to separate the two optical elements 122 and 124 . The material of the spacer G is metal, for example. In detail, in this embodiment, the spacer G has a gap O3, and the position of the gap O3 corresponds to the alignment edge C of the optical element 120 in space, that is, viewed from the optical axis direction of the optical element 120, the gap O3 corresponds to the optical element 120. The alignment edge C1 of the element 122 corresponds to the alignment edge C2 of the optical element 124 . In this way, in addition to separating the two optical elements 122 and 124 by the spacer G, the design of the notch O3 can also provide a buffer space when the two optical elements 122 and 124 are thermally expanded. In addition, the spacer G with the notch O3 is designed to be similar to the alignment edges C1 and C2 of the two optical elements 122 and 124 , and can be further adapted to the positioning portion 132 of the carrier module 130 for easy assembly and optical alignment, thereby shortening the assembly time. and optical calibration time.

In this embodiment, the carrier module 130 further includes a plurality of locking element groups 138 for locking the optical element 120 , that is, locking the optical element 120 on the carrier portion 134 . In this embodiment, the number of the locking element groups 138 is, for example, two, but the present invention is not limited thereto. Therefore, the stability of the optical element 120 in the carrier module 130 can be further increased, thereby improving the optical quality. In this embodiment, the locking element group 138 is composed of, for example, a locking screw and a washer, but the present invention is not limited thereto.

In addition, in this embodiment, the carrying module 130 further includes at least one assembly portion 139 for connecting with the casing of the projection device 10 . The method of locking it to the casing of the projection device 10 can obtain sufficient teachings, suggestions and implementation descriptions from ordinary knowledge in the technical field, so it will not be repeated here.

FIG. 7 is a schematic diagram of a part of a lighting system according to another embodiment of the present invention. FIG. 8 is an exploded schematic view of a portion of the lighting system of FIG. 7 . Please refer to Figure 7 and Figure 8. The optical element 120 and the carrying module 130A are shown in part of the lighting system of this embodiment, wherein the carrying module 130A of this embodiment is similar to the carrying module 130 shown in FIG. 4 . The difference between the two is that, in this embodiment, the assembling portion 139A is disposed outside the positioning portion 132 and the bearing portion 134 , that is, on the opposite left and right sides of the bearing module 130A. Therefore, the post in the carrying module 130A can be further omitted, and the assembly part 139A can be used to connect to the casing or other components in the projection device. In this way, the carrying module 130A can be further matched and applied to different projection apparatuses by using different arrangement positions of the assembling portion 139A.

To sum up, the embodiments of the present invention have at least one of the following advantages or effects. In the projection device of the present invention, the illumination system includes at least one optical element and a carrier module supporting the at least one optical element, wherein the at least one optical element has an alignment edge, and the carrier module includes a positioning portion adapted to the alignment edge. In this way, the optical element designed with the alignment edge can be easily assembled and optically aligned by fitting with the positioning portion of the carrier module, thereby shortening the assembly and optical alignment time. In addition, the design of the mutually adapted alignment edge and the positioning portion can prevent the optical element from rotating in the carrier module, thereby improving the optical quality. On the other hand, the alignment side of the at least one optical element is not parallel to the short side of the light incident surface of the uniform light element in the illumination system. Therefore, the volume of the optical element can be reduced, and at the same time, the light beam passing through the optical element can be completely transmitted into the light incident surface of the homogenizing element, thereby avoiding the loss of light energy. In addition, the long side of the light incident surface of the homogenizing element can have a larger distance from the boundary of the optical element, so that the optical effect will not be lost by the scattering caused by the boundary of the optical element.

However, the above are only preferred embodiments of the present invention, and should not limit the scope of implementation of the present invention, that is, any simple equivalent changes and modifications made according to the claims of the present invention and the content of the invention are all It still falls within the scope of the patent of the present invention. Furthermore, any embodiment or claim of the present invention is not required to achieve all of the objects or advantages or features disclosed herein. In addition, the abstract and the title of the invention are only used to assist the retrieval of patent documents, and are not used to limit the scope of rights of the present invention. In addition, the terms such as "first" and "second" mentioned in this specification or the claims are only used to name the elements or to distinguish different embodiments or ranges, and are not used to limit the number of elements. upper or lower limit.

Description of reference numbers:

10: Projection device

50: Light valve

60: Projection lens

100: Lighting System

110: Light source

112: Excitation light source

114: Auxiliary light source

120, 122, 124: Optical Components

130, 130A: carrying module

132: Positioning part

134: Bearing Department

136: Abutment

138: Locking element group

139, 139A: Assembly Department

140: uniform light element

150: wavelength conversion element

160: Spectroscopic element

170: Reflective element

180: Filter device

190: Focusing Element

A1, A2: Optical axis

C, C1, C2: alignment edge

D1: Long side

D2: Short side

E: inner wall

G: Spacer

L: Beam

L1: Excitation beam

L2: Auxiliary beam

L3: Excited beam

LB: Lighting beam

LI: Image beam

LP: Projection beam

O1: The first opening

O2: Second opening

O3: Notch

S: light-incident surface.

Claims (20)

1. An illumination system, comprising at least one light source, at least one optical element, a carrier module, and a light homogenizing element, wherein:

the at least one light source is used for providing at least one light beam;

the at least one optical element is configured on the transmission path of the at least one light beam, and the at least one optical element is provided with an alignment edge;

the bearing module is used for bearing the at least one optical element and comprises a positioning part; and

the light incident surface of the light homogenizing element is provided with a long edge and a short edge and is used for allowing the at least one light beam to pass through so as to form an illumination light beam, the bearing module is arranged between the at least one light source and the light homogenizing element, the alignment edge is matched with the positioning part, and the alignment edge is not parallel to the short edge of the light incident surface.

2. The illumination system of claim 1, wherein the at least one optical element is a depolarizer.

3. The illumination system of claim 1, wherein the alignment edge is parallel to the long edge of the light incident surface.

4. The illumination system of claim 1, wherein the optically effective area of the at least one optical element is larger than the optically effective area of the input surface.

5. The illumination system of claim 1, wherein the carrier module comprises a carrier portion and an inner wall, wherein the inner wall surrounds the carrier portion to form a first opening, the area of the first opening is larger than the area of the at least one optical element, and the at least one optical element is disposed on the carrier portion in the first opening, the carrier portion has a second opening, and the area of the second opening is smaller than the area of the at least one optical element.

6. The lighting system of claim 5, wherein the carrier module comprises a plurality of abutments protruding from the inner wall, the plurality of abutments abutting and clamping the at least one optical element.

7. The illumination system of claim 1, wherein the number of the at least one optical element is two, the carrier module comprises a spacer, and the spacer is disposed between the two optical elements to separate the two optical elements.

8. The illumination system of claim 7, wherein the spacer has a gap and the gap is spatially positioned corresponding to the alignment edge.

9. The lighting system of claim 1, wherein the carrier module comprises a plurality of locking elements for locking the at least one optical element.

10. The lighting system, as set forth in claim 1, wherein the carrier module comprises at least one assembly portion for connecting to a cabinet.

11. A projection apparatus, comprising an illumination system, at least one light valve, and a projection lens, wherein:

the illumination system comprises at least one light source, at least one optical element, a bearing module and a light homogenizing element, wherein:

the at least one light source is used for providing at least one light beam;

the at least one optical element is configured on the transmission path of the at least one light beam, and the at least one optical element is provided with an alignment edge;

the bearing module is used for bearing the at least one optical element and comprises a positioning part; and

the light incident surface of the light homogenizing element is provided with a long side and a short side and is used for allowing the at least one light beam to pass through so as to form an illumination light beam;

the at least one light valve is configured on the transmission path of the illumination light beam and is used for converting the illumination light beam into an image light beam; and

the projection lens is disposed on a transmission path of the image light beam and is used for converting the image light beam into a projection light beam, wherein the bearing module is disposed between the at least one light source and the dodging element, the alignment edge is adapted to the positioning portion, and the alignment edge is not parallel to the short edge of the light incident surface.

12. The projection device of claim 11, wherein the at least one optical element is a depolarizer.

13. The projection device of claim 11, wherein the alignment edge is parallel to the long edge of the light incident surface.

14. The projection apparatus of claim 11, wherein an optically effective area of the at least one optical element is larger than an optically effective area of the light incident surface.

15. The projection apparatus according to claim 11, wherein the supporting module comprises a supporting portion and an inner wall, wherein the inner wall surrounds the supporting portion to form a first opening, an area of the first opening is larger than an area of the at least one optical element, and the at least one optical element is disposed on the supporting portion in the first opening, the supporting portion has a second opening, and an area of the second opening is smaller than an area of the at least one optical element.

16. The projection apparatus according to claim 15, wherein the carrier module comprises a plurality of abutments protruding from the inner wall, the plurality of abutments abutting and clamping the at least one optical element.

17. The projection apparatus according to claim 11, wherein the at least one optical element is two optical elements, the supporting module includes a spacer, and the spacer is disposed between the two optical elements to separate the two optical elements.

18. The projection apparatus according to claim 17, wherein the spacer has a gap, and the gap is spatially located corresponding to the alignment edge.

19. The projection apparatus according to claim 11, wherein the carrier module comprises a plurality of locking elements for locking the at least one optical element.

20. The projection device of claim 11, wherein the carrier module includes at least one assembly portion configured to couple to a chassis.

Images