CN112711169B

CN112711169B - Illumination system and projection device

Info

Publication number: CN112711169B
Application number: CN201911022412.4A
Authority: CN
Inventors: 林姚顺; 叶耀琮
Original assignee: Coretronic Corp
Current assignee: Coretronic Corp
Priority date: 2019-10-25
Filing date: 2019-10-25
Publication date: 2022-09-27
Anticipated expiration: 2039-10-25
Also published as: CN112711169A

Abstract

An illumination system comprises at least one light source, at least one optical element, a bearing module and a light homogenizing element. 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. At least one optical element has an alignment edge. The bearing module is used for bearing at least one optical element. The bearing module comprises a positioning part. The light incident surface of the light homogenizing element is provided with a long edge and a short edge and is used for allowing at least one light beam to pass through so as to form an illumination light beam, wherein the bearing module is arranged between 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. The invention also provides a projection device comprising the illumination system. The illumination system and the projection device provided by the invention can shorten the time for assembling and optically calibrating, and prevent the optical element from rotating in the bearing module, thereby improving the optical quality.

Description

Illumination system and projection device

Technical Field

The present invention relates to an optical element and an optical device, and more particularly, to an illumination system and a projection apparatus.

Background

A projection apparatus is a display apparatus for generating large-sized images, and the development of technology is continuously progressing. The projection device has an imaging principle of converting an illumination beam generated by an illumination system into an image beam by a light valve, and projecting the image beam onto a projection target (such as a screen or a wall surface) through a projection lens to form a projection image.

In addition, with the market requirements for brightness, color saturation, service life, non-toxicity, environmental protection, and the like of projection devices, the illumination system has evolved from an Ultra-high-performance lamp (UHP lamp), a Light-emitting diode (LED), and the most advanced Laser Diode (LD) Light source. However, in the lighting system, the current cost of generating red and blue light by the light source is more favorable by using the blue laser diode to emit an excitation beam to the fluorescent color wheel, and using the excitation beam to excite the phosphor of the fluorescent color wheel to generate a converted light, and then filtering out the required red light or green light through the filter element for use.

However, in the conventional illumination system structure, the polarization polarity of the excitation beam entering the projection device is destroyed by the optical elements inside the projection device, so that the polarization direction and intensity of the laser beam are not uniform, and the brightness of the display image is not uniform. Therefore, when the projection apparatus generates a display screen of a stereoscopic image in the polarized stereoscopic mode (lens plus polarizing plate), the image screen projected from the lens and the polarizing plate will have the phenomenon of uneven screen color or uneven brightness.

The background section is only used to help the understanding of the present invention, and therefore the disclosure in the background section may include some known techniques which are not known to those skilled in the art. The statements in the "background" section do not represent that matter or the problems which may be solved by one or more embodiments of the present invention, but are known or appreciated by those skilled in the art before filing the present application.

Disclosure of Invention

The invention provides an illumination system and a projection device, which can shorten the time of assembling and optical calibration, avoid the optical element from rotating in a bearing module and further improve the optical quality.

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

In order to achieve one or a part of or all of the above objectives or other objectives, an embodiment of the invention provides an illumination system, including at least one light source, at least one optical element, a carrying module, and a light equalizing element, where the at least one light source is configured to provide at least one light beam, the at least one optical element is disposed on a transmission path of the at least one light beam, the at least one optical element has an alignment edge, the carrying module is configured to carry the at least one optical element, the carrying module includes a positioning portion, a light incident surface of the light equalizing element has a long side and a short side, and the at least one light beam is configured to pass through the light incident surface to form an illumination light beam, and the carrying module is disposed between the at least one light source and the light equalizing element, and the alignment edge is adapted to the positioning portion and is not parallel to the short side of the light incident surface.

In order to achieve one or a part of or all of the above objectives or other objectives, another embodiment of the invention provides a projection apparatus. The projection device comprises an illumination system, at least one light valve and a projection lens. The illumination system comprises at least one light source, at least one optical element, a bearing module and a light uniformizing element, wherein the at least one light source is used for providing at least one light beam, the at least one optical element is arranged on a transmission path of the at least one light beam, 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, the bearing module comprises a positioning part, and a light incoming surface of the light uniformizing 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 at least one light valve is configured on the transmission path of the illumination beam and is used for converting the illumination beam into an image beam. The projection lens is configured 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 configured between the at least one light source and the dodging element, the alignment edge is adapted to the positioning part and is not parallel to the short edge of the light incident surface.

Based on the above, the embodiments of the invention have at least one of the following advantages or efficacies. In the projection apparatus of the present invention, the illumination system includes at least one optical element and a carrying module carrying the at least one optical element, wherein the at least one optical element has an alignment edge, and the carrying module includes a positioning portion adapted to the alignment edge. Therefore, the optical element with the aligning edge can be easily assembled and optically calibrated by being matched with the positioning part of the bearing module, and the time for assembling and optically calibrating is further shortened. In addition, the design of the mutually-matched alignment edge and the positioning part can prevent the optical element from rotating in the bearing module, so that the optical quality can be improved. On the other hand, the alignment edge of at least one optical element is not parallel to the short edge of the light incident surface of the light homogenizing element in the illumination system. Therefore, the volume of the optical element can be reduced, and meanwhile, the light beam passing through the optical element is completely transmitted into the light incident surface of the light uniformizing element, so that the light energy loss is avoided. In addition, the long side of the light incident surface of the dodging element and the boundary of the optical element have larger distance, so that the optical effect is not lost by scattering caused by the boundary of the optical element.

In order to make the aforementioned and other features and advantages of the invention more comprehensible, embodiments accompanied with figures are described in detail below.

Drawings

Fig. 1 is a schematic view of a projection apparatus according to an embodiment of the invention.

Fig. 2 is a schematic cross-sectional view of a portion of an illumination system according to an embodiment of the invention.

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

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

Fig. 4 is a schematic diagram of a portion of an illumination system according to an embodiment of the invention.

Fig. 5 is an exploded schematic view of a portion of the illumination system of fig. 4.

Fig. 6 is a schematic view of the carrier module of fig. 4.

Fig. 7 is a schematic view of a portion of an illumination system according to another embodiment of the present invention.

Fig. 8 is an exploded schematic view of a portion of the illumination system of fig. 7.

Detailed Description

The foregoing and other technical and other features and advantages of the invention will be apparent from the following more particular description of preferred embodiments, as illustrated in the accompanying drawings. Directional terms as referred to in the following examples, for example: up, down, left, right, front or rear, etc., are simply directions with reference to the drawings. Accordingly, the directional terminology used is intended to be illustrative and is not intended to be limiting.

Fig. 1 is a schematic view of a projection apparatus according to an embodiment of the invention. Referring to fig. 1, in the present embodiment, a projection apparatus 10 is used for providing a projection light beam LP. Specifically, the projection apparatus 10 includes an illumination system 100, at least one light valve 50, and a projection lens 60, and the illumination system 100 is used for providing an illumination beam LB. The light valve 50 is disposed on a transmission path of the illumination beam LB and is configured to convert the illumination beam LB into at least one image beam LI. The illumination beam LB is a light beam provided to the light valve 50 by the illumination system 100 in a time sequence. The projection lens 60 is disposed on a transmission path of the image light beam LI, and is configured to convert the image light beam LI into a projection light beam LP, and the projection light beam LP is projected onto a projection target (not shown), such as a screen or a wall.

In the technology applied to the stereoscopic display, the projection apparatus 10 of the present embodiment can be applied as a polarization type stereoscopic image projector. Specifically, when two projection apparatuses 10 are used in the polarized stereo mode (i.e., a polarizer is disposed outside the projection lens 60 or a polarizer is built in the projection apparatus 10), the two projection apparatuses 10 can be used to provide the projection light beams LP to pass through the polarizers respectively to generate image frames in different polarization states, so that the user can observe a stereo display frame through polarized stereo glasses, for example, the stereo glasses worn by the user are respectively disposed with two polarization elements for a left-eye lens and a right-eye lens, and the two polarization elements correspond to the image frames in the polarization states generated by the polarizer of the projection apparatuses, so that the left eye and the right eye of the user receive the image frames projected by the corresponding projectors respectively, thereby achieving the effect of stereo display.

In detail, in the present embodiment, the light valve 50 is a reflective light modulator such as a Liquid Crystal On Silicon (LCoS) panel, a Digital Micro-mirror Device (DMD), or the like. In some embodiments, the light valve 50 may also be a transmissive light Modulator such as a transmissive Liquid Crystal Panel (transmissive Liquid Crystal Panel), an Electro-Optic Modulator (Electro-Optic Modulator), a magneto-Optic Modulator (magneto-Optic Modulator), an Acousto-Optic Modulator (AOM), and the like. The type and type of the light valve 50 are not limited in the present invention. The detailed steps and embodiments of the method for converting the illumination beam LB into the image beam LI by the light valve 50 can be obtained from the general knowledge in the art, and therefore, the detailed description thereof is omitted here. In the embodiment, the number of the light valves 50 is one, for example, the projection apparatus 10 using a single digital micromirror device (1-DMD), but may be a plurality in other embodiments, and the invention is not limited thereto.

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

In addition, in some embodiments, the projection apparatus 10 may further optionally include an optical element with condensing, refracting or reflecting functions to guide the illumination beam LB emitted from the illumination system 100 to the light valve 50 and to guide the image beam LI emitted from the light valve 50 to the projection lens 60, so as to generate the projection beam LP, but the invention is not limited thereto.

The illumination system 100 includes at least one light source 110, at least one optical element 120, a carrier module 130, and a light uniformizing element 140. Specifically, the illumination system 100 further includes a wavelength conversion element 150, at least one light splitting element 160, at least one reflecting element 170, and a filtering device 180. In different embodiments, the kinds and the number of the wavelength conversion element 150, the light splitting element 160, the reflecting element 170 and the filtering device 180 may vary according to different types of the illumination system 100, and the invention is not limited thereto.

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 an excitation light beam L1, and the auxiliary light source 114 provides an auxiliary light beam L2. In the present 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 the present 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 between the excitation light source 112 and the dodging element 140. The wavelength conversion element 150 has a first region and a second region. The excitation light beam L1 is sequentially irradiated to the first region and the second region of the wavelength conversion element 150. The first region of the wavelength converting element 150 has a wavelength converting material to convert the excitation light beam L1 into the stimulated light beam L3, and reflects the stimulated light beam L3 toward the excitation light source 112. In the present embodiment, for example, the blue excitation beam is converted into a green beam or a yellow-green beam. The second region of the wavelength converting element 150 has a light transmissive element (e.g., a glass sheet) or opening for the excitation light beam L1 to penetrate through the wavelength converting element 150. In different embodiments, the configuration of the wavelength converting material of the first region of the wavelength converting element 150 may vary for different types of illumination systems 100. The second region of the wavelength converting element 150 has a reflective element (e.g. a metal sheet with a reflective coating) for reflecting the excitation light beam L1. The present invention is not limited to the arrangement and the type of the wavelength conversion element 150.

The at least one beam splitter 160 is disposed on the transmission path of the excitation light beam L1 or the auxiliary light beam L2, and the at least one reflector 170 is used for reflecting or transmitting the light beams. For example, in the present embodiment, one of the light splitting elements 160 is disposed between the excitation light source 112 and the wavelength conversion element 150. The other one of the at least one light splitting element 160 is disposed between the auxiliary light source 114 and the one of the at least one light splitting element 160. In detail, the at least one light splitting element 160 includes a reflective Green Mirror with Green and Orange reflection (DMGO) and a reflective Blue light splitter (DMB), wherein the reflective Green Mirror (fig. 1 right light splitting element 160) is located between the excitation light source 112 and the wavelength conversion element 150, and is used for reflecting the excited light beam L3 and allowing the excited light beam L1 and the auxiliary light beam L2 to penetrate, so as to collect and transmit all the required light beams to the at least one optical element 120. The reflected blue beam splitter (left beam splitter 160 in fig. 1) is located between the auxiliary light source 114 and the right beam splitter 160 in fig. 1, and is used for reflecting the excitation light beam L1 and allowing the auxiliary light beam L2 to penetrate therethrough.

In other embodiments, a Wedge (Wedge) transparent component (not shown) may be disposed between the excitation light source 112 and the light splitting component 160 at the right side of fig. 1 for correcting the spot size of the excitation light beam L1 on the wavelength conversion component 150 to make the intensity of the excitation light beam L1 not too concentrated, so as to prevent the wavelength conversion component 150 from being damaged due to high temperature. The wedge-shaped light-transmitting component is made of glass material, for example, and is 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 time sequence to generate a blue light portion, a red light portion, and a green light portion of the illumination light beam LB. In other embodiments, the filter device 180 can be disposed between the at least one optical element 120 and the dodging element 140. Specifically, in the present embodiment, the filtering device 180 is a Color wheel (Color wheel) device, and is used for generating a filtering effect on the excitation light beam L1, the auxiliary light beam L2 or the excited light beam L3 according to a time sequence, so that the Color purity of the light beam passing through the filtering device 180 is increased. In different embodiments, the arrangement of the filters of different colors in the filtering device 180 can be changed according to different types of the illumination system 100, and the invention is not limited to the arrangement and the type of the filtering device 180.

The dodging element 140 is configured to pass the excitation light beam L1, the auxiliary light beam L2, and the stimulated light beam L3 to form the illumination light beam LB. That is, the dodging element 140 is disposed on the transmission path of the excitation light beam L1, the auxiliary light beam L2, and the stimulated light beam L3, and is used to adjust the spot shape of the light beams, so that the spot shape of the illumination light beam LB emitted from the dodging element 140 can match the shape (e.g., rectangular) of the working area (active area) of the light valve 50, and the light intensity of the spots is uniform or close to each other. The light incident surface S of the light 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 passing at least one light beam L to form an illumination light beam LB. In the embodiment, the light uniformizing element 140 is, for example, an integrating rod, but in other embodiments, the light uniformizing element 140 may also be other suitable types of optical elements, such as a lens array, and the invention is not limited thereto.

Fig. 2 is a schematic cross-sectional view of a portion of an illumination system according to an embodiment of the invention. Please refer to fig. 1 and fig. 2. For convenience of illustration, the light source 110 and the light beam L provided by the light source 110 shown in fig. 2 are only schematically illustrated, but the portion of the illumination system 100 shown in fig. 2 can be at least applied to the projection apparatus 10 shown in fig. 1, and the invention is not limited thereto. The illumination system 100 applied to the projection apparatus 10 will be described below. The at least one optical element 120 is disposed on a transmission path of the at least one light beam L and located between the light source 110 and the light uniformizing element 140, so that the light beam L enters the optical element 120 and then enters the light uniformizing element 140.

Fig. 3A and 3B are schematic views of different optical elements, respectively. FIG. 3C is a schematic diagram of different optical elements shown in FIG. 3A and FIG. 3B. Please refer to fig. 2, fig. 3A to fig. 3C. In the present embodiment, the at least one optical element 120 is, for example, a Depolarizer (Depolarizer) for homogenizing the polarization state of the light beam. In detail, the number of the at least one optical element is two, that is, the two

optical elements

122 and 124 having the birefringence characteristic are provided. 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 the 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, regarding the geometrical shape of the structure, in the embodiment, the optical element 122 and the optical element 124 respectively have a light incident surface and a light emitting surface that are not parallel, and the optical element 124 is disposed between the optical element 122 and the light uniformizing element 140. The optical effective area (the area through which the light beam passes) of the optical element 120 is larger than the optical effective area of the light incident surface of the dodging 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 symmetric, the geometric shapes of the optical element 122 and the optical element 124 are, for example, trapezoidal cylinders, and there is a space between the optical element 122 and the optical element 124, as shown in fig. 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 the present embodiment, the optical element 122 is made of a material having a birefringent property, such as quartz crystal. The optical element 124 is made of a material having a similar refractive index as 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 also be another material, and the invention is not limited thereto. In this embodiment, the illumination 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, and is configured to focus the light beam L so that the light beam L can be received by the dodging element 140 after passing through the optical element 120. Therefore, when the projection apparatus 10 displays a stereoscopic image, the color or brightness of the displayed image is uniform, so that the user can observe the stereoscopic displayed image with better uniformity.

Fig. 4 is a schematic diagram of a portion of an illumination system according to an embodiment of the invention. Fig. 5 is an exploded schematic view of a portion of the illumination system of fig. 4. Fig. 6 is a schematic view of the carrier module of fig. 4. Please refer to fig. 3A to fig. 6. The carrier module 130 is used for carrying at least one optical element 120. In the present embodiment, the optical element 120 has an alignment edge C, and the supporting module 130 includes a positioning portion 132 having a structural shape that can be adapted to the alignment edge C, such as a planar inner wall. The carrier module 130 is disposed between the at least one light source 110 and the light uniformizing element 140 (see 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 the present 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 portions 132 of the carrier module 130. In this way, the optical element 120 with the alignment edge C is designed to be easily assembled and optically aligned by being matched with the positioning portion 132 of the carrier module 130, thereby shortening the time for assembling and optically aligning. In addition, the design of the mutually matched alignment edge C and the positioning portion 132 can prevent the optical element 120 from rotating in the supporting module 130, thereby improving the optical quality.

It should be noted that, referring to fig. 3C, the alignment edge C is not parallel to the short edge D2 of the light incident surface S of the dodging element 140. For example, in the embodiment, the alignment edge C of the optical element 120 is parallel to the long edge D1 of the light incident surface S of the light uniformizing element 140, but the invention is not limited thereto. Therefore, the volume of the optical element 120 can be reduced, and the light beam L passing through the optical element 120 is completely transmitted into the light incident surface S of the light uniformizing element 140 to avoid light energy loss. In addition, the long side D1 of the light incident surface S of the light uniformizing element 140 has a larger distance from the boundary of the optical element 120, so that the optical effect is not lost by scattering caused at the boundary of the optical element 120. In an embodiment, referring to fig. 3A, 3B and 3C, the alignment edge C of the at least one optical element 120 is parallel to the long edge D1 of the light incident surface S of the light uniformizing element 140 and the optical axis a1 of the optical element 122. The alignment edge C of the at least one optical element 120 is not parallel to the optical axis a2 of the optical element 124.

Specifically, the supporting module 130 further includes a supporting portion 134 and an inner wall E, the supporting portion 134 is used for supporting the optical element 120, and a distance is formed between the inner wall E and the optical element 120, that is, the optical element 120 is placed in the supporting module 130 without contacting the inner wall E, which is helpful for absorbing manufacturing tolerance and facilitating assembly. The inner wall E surrounds the bearing part 134 to form a first opening O1, and the area of the first opening O1 is larger than the area of the optical element 120 (i.e., the two optical elements 122 and 124). In addition, the carrying part 134 has a second opening O2 for the light beam L to pass through, and since the second opening O2 is formed by the carrying part 134, the area of the second opening O2 is smaller than that of the optical element 120. Therefore, the optical element 120 may be disposed on the bearing portion 134 within the inner wall E (and the first opening O1).

In addition, in the present embodiment, the carrier module 130 further includes a plurality of abutting portions 136 protruding from the inner wall E. The abutting portions 136 are used for abutting and clamping the optical element 120, as shown in fig. 4. In other words, the abutting portion 136 provides a clamping function in an abutting manner compared to the limiting function of the inner wall E, and the portion of the inner wall E not in contact with the optical element 120 and the plurality of abutting portions 136 in contact with the optical element 120 can effectively eliminate the structural tolerance caused by the assembly, and the portion of the optical element 120 not in contact with the abutting portion 136 can be easily assembled or disassembled by an operator. Therefore, the stability of the optical element 120 in the carrier module 130 can be further increased, and the optical quality can be further improved.

In addition, in the 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 spacer G is made of metal, for example. In detail, in the present embodiment, the spacer G has a notch O3, and the notch O3 is spatially located corresponding to the alignment edge C of the optical element 120, that is, the notch O3 corresponds to the alignment edge C1 of the optical element 122 and the alignment edge C2 of the optical element 124 when viewed from the optical axis direction of the optical element 120. In this way, in addition to the spacer G being able to separate the two

optical elements

122, 124, the gap O3 is designed to have a buffer space when the two

optical elements

122, 124 expand due to heat. In addition, the spacer G with the gap O3 is 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 and optical alignment time.

In the present embodiment, the supporting module 130 further includes a plurality of locking element sets 138 for locking the optical element 120, i.e., locking the optical element 120 on the supporting portion 134. In the present embodiment, the number of the locking element sets 138 is, for example, two, but the invention is not limited thereto. Therefore, the stability of the optical element 120 in the carrier module 130 can be further increased, and the optical quality can be further improved. In the embodiment, the locking element set 138 is composed of a locking screw and a washer, but the invention is not limited thereto.

In addition, in the embodiment, the carrying module 130 further includes at least one assembling portion 139 for connecting to the chassis of the projection apparatus 10. The method for locking the housing of the projection apparatus 10 can be taught, suggested, and implemented sufficiently by the general knowledge in the art, and thus will not be described in detail.

Fig. 7 is a schematic view of a portion of an illumination system according to another embodiment of the present invention. Fig. 8 is an exploded schematic view of a portion of the illumination system of fig. 7. Please refer to fig. 7 and fig. 8. The optical element 120 and the carrying module 130A are shown in a part of the illumination system of the present embodiment, wherein the carrying module 130A of the present embodiment is similar to the carrying module 130 shown in fig. 4. The difference between the two is that in the present embodiment, the assembling portion 139A is disposed outside the positioning portion 132 and the carrying portion 134, i.e. on the opposite left and right sides of the carrying module 130A. Therefore, the supporting column of the carrying module 130A can be further omitted, and the assembling portion 139A is connected to the chassis or other components of the projection apparatus. In this way, the carrying module 130A can be further applied to different projection apparatuses by different installation positions of the assembling portion 139A.

In summary, the embodiments of the invention have at least one of the following advantages or effects. In the projection apparatus of the present invention, the illumination system includes at least one optical element and a carrying module carrying the at least one optical element, wherein the at least one optical element has an alignment edge, and the carrying module includes a positioning portion adapted to the alignment edge. Therefore, the optical element with the aligning edge can be easily assembled and optically calibrated by being matched with the positioning part of the bearing module, and the time for assembling and optically calibrating is further shortened. In addition, the design of the mutually-matched alignment edge and the positioning part can prevent the optical element from rotating in the bearing module, so that the optical quality can be improved. On the other hand, the alignment edge of at least one optical element is not parallel to the short edge of the light incident surface of the light homogenizing element in the illumination system. Therefore, the volume of the optical element can be reduced, and meanwhile, the light beam passing through the optical element is completely transmitted into the light incident surface of the light uniformizing element, so that the light energy loss is avoided. In addition, the long edge of the light incident surface of the light homogenizing element can have a larger distance with the boundary of the optical element, so that the optical effect cannot be lost due to scattering caused by the boundary of the optical element.

However, the above description is only a preferred embodiment of the present invention, and the scope of the present invention should not be limited thereby, and all the simple equivalent changes and modifications made according to the claims and the summary of the invention are still included in the scope of the present invention. It is not necessary for any embodiment or claim of the invention to address all of the objects, advantages, or features disclosed herein. In addition, the abstract and the title of the invention are provided to facilitate the search of patent documents and should not be construed as limiting the scope of the invention. Furthermore, the terms "first", "second", and the like in the description or the claims are used only for naming elements (elements) or distinguishing different embodiments or ranges, and are not used for limiting the upper limit or the lower limit on the number of elements.

Description of reference numerals:

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 element

130. 130A: bearing module

132: positioning part

134: bearing part

136: abutting part

138: locking component set

139. 139A: assembly part

140: light uniformizing element

150: wavelength conversion element

160: light splitting element

170: reflective element

180: light filtering device

190: focusing element

A1, A2: optical axis

C. C1, C2: alignment edge

D1: long side

D2: short edge

E: inner wall

G: spacer member

L: light beam

L1: excitation light beam

L2: auxiliary light beam

L3: stimulated light beam

LB: illuminating light beam

And LI: image light beam

And (3) LP: projection light beam

O1: a first opening

O2: second opening

O3: gap

S: a light incident surface.

Claims

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 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.