Light machine and projection equipment
By adopting a translational wavelength conversion module substrate design in laser projection equipment to replace the rotating phosphor wheel module, the problems of large optomechanical size and noise are solved, achieving a smaller size and more efficient heat dissipation.
Patent Information
- Application Number
- CN202423322755.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-31
- Publication Date
- 2025-12-05
- Estimated Expiration
- 2034-12-31
AI Technical Summary
In existing laser projection equipment, the rotation of the fluorescent wheel module takes up a lot of space, resulting in a large overall size of the optical engine, and it requires motor drive, which increases the noise and cost of the equipment.
A wavelength conversion module substrate that can be shifted is used. By sequentially incidenting the excitation light onto the functional areas at different positions on the substrate, the traditional rotating phosphor wheel module is replaced, reducing the size of the wavelength conversion module. Furthermore, the optical path design is optimized by setting a reflective layer and a light-transmitting plate.
It effectively reduced the overall size of the optical engine, lowered noise, improved the heat dissipation efficiency and brightness of the optical engine, reduced costs, and enhanced the user experience.
Smart Images
Figure CN223637877U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the field of projection technology, in particular to a light machine and a projection device comprising a light machine. BACKGROUND
[0002] The current laser projection device still uses a monochromatic laser diode as a main light source, and a plurality of light source lights with different wavelengths are obtained by irradiating the light emitted by the monochromatic laser diode to a rotating fluorescent wheel module; however, the existing fluorescent wheel module greatly increases the overall volume of the light machine, for example, the diameter of the wheel disc of the fluorescent wheel module is often as high as 100 mm, and the motor for driving the wheel disc to rotate continuously also occupies a lot of space of the light machine. CONTENT OF THE UTILITY MODEL
[0003] The present application discloses a light machine and a projection device, which are beneficial to reduce the overall volume of the light machine.
[0004] In a first aspect, the present application relates to a light machine, comprising:
[0005] a light source module configured to emit excitation light; and
[0006] a wavelength conversion module comprising a substrate, wherein the substrate comprises a plurality of functional areas.
[0007] The substrate is arranged on the light path of the excitation light in a translatable manner, so that the excitation light can be sequentially incident on the functional areas located at different positions of the substrate.
[0008] The light machine provided by the embodiments of the present application has the following advantages compared with the prior art: the substrate of the wavelength conversion module in the light machine is arranged on the light path of the excitation light in a translatable manner, so that the excitation light can be sequentially incident on the functional areas located at different positions of the substrate, and compared with the existing fluorescent wheel module, the volume of the wavelength conversion module in the present application is reduced, thereby being beneficial to reduce the overall volume of the light machine.
[0009] In an embodiment, the substrate can be translated relative to the light source module along at least one direction perpendicular to the optical axis direction of the excitation light, so that the excitation light can be incident on the functional areas located at different positions of the substrate.
[0010] In an embodiment, the plurality of functional areas comprise a wavelength conversion area; the wavelength conversion module comprises a wavelength conversion layer arranged in the wavelength conversion area, and the wavelength conversion layer is configured to convert the excitation light into stimulated light.
[0011] The wavelength conversion layer is arranged on a side surface of the substrate away from the light source module, and the substrate can transmit the excitation light to the wavelength conversion layer; or,
[0012] The wavelength conversion module further comprises a light-transmissive plate spaced apart from the substrate; the wavelength conversion layer is attached to two side surfaces adjacent to the substrate and the light-transmissive plate, the substrate is capable of transmitting the excitation light to the wavelength conversion layer, and the light-transmissive plate is capable of transmitting the stimulated light outwards; or,
[0013] The substrate is capable of reflecting the excitation light, and the at least two wavelength conversion layers are arranged on a side surface of the substrate close to the light source module.
[0014] In an embodiment, the wavelength conversion module further comprises a first reflective layer arranged in the wavelength conversion region; the first reflective layer is attached to two side surfaces adjacent to the substrate and the wavelength conversion layer.
[0015] The first reflective layer is used for reflecting the stimulated light emitted by the wavelength conversion layer to the first reflective layer, so that the stimulated light is emitted away from the light source module in the direction of the substrate.
[0016] In an embodiment, the light machine further comprises a color filter element, the color filter element is used for filtering the stimulated light before emitting; wherein the color filter element is arranged on a side of the wavelength conversion module away from the light source module; or
[0017] When the wavelength conversion module further comprises a light-transmissive plate spaced apart from the substrate, the color filter element is attached to a side surface of the light-transmissive plate away from the light source module; or
[0018] The color filter element is arranged on a side of the wavelength conversion module close to the light source module.
[0019] In an embodiment, the plurality of functional regions further comprises a transmission region, the transmission region is capable of transmitting the excitation light emitted from the light source module.
[0020] In an embodiment, the light machine further comprises a light guiding module, the light guiding module is arranged on the light emitting side of the light source module, and is used for receiving and guiding the excitation light to be incident on the wavelength conversion module.
[0021] In an embodiment, the light guiding module comprises a transreflective element, the transreflective element is arranged on the light emitting side of the light source module, and the transreflective element is used for transmitting the excitation light emitted from the light source module; the transreflective element is also used for reflecting the stimulated light emitted from the wavelength conversion module.
[0022] In an embodiment, the transreflective element comprises a first surface close to a side of the wavelength conversion module, the first surface is provided with a second reflective layer, and the second reflective layer is capable of reflecting the stimulated light emitted from the wavelength conversion module.
[0023] In an embodiment, the trans-reflection element further comprises a second surface opposite to the first surface, and an angle between the second surface and the optical axis direction of the excitation light ranges from 40° to 50°.
[0024] In an embodiment, the light guiding module further comprises a phase delay element, the phase delay element is arranged between the trans-reflection element and the wavelength conversion module, and the phase delay element is configured to convert the excitation light emitted by the trans-reflection element into first polarized light, the first polarized light having a first polarization state.
[0025] The plurality of functional areas further comprises a reflection area, the reflection area is configured to receive and reflect the first polarized light.
[0026] The phase delay element is further configured to convert the first polarized light emitted by the reflection area into second polarized light, the second polarized light having a second polarization state.
[0027] In an embodiment, the light engine further comprises a light collecting module.
[0028] The light collecting module is arranged between the wavelength conversion module and the light guiding module, and the light collecting module is configured to receive and converge the stimulated light emitted by the wavelength conversion module; or
[0029] The light collecting module is arranged on a side of the wavelength conversion module away from the light guiding module, and the light collecting module is configured to receive and converge the stimulated light emitted by the wavelength conversion module.
[0030] In an embodiment, the normal projection areas of the at least two functional areas on the substrate are different from each other.
[0031] In an embodiment, the wavelength conversion module further comprises a heat dissipation element arranged on the substrate, and a normal projection of the heat dissipation element on the substrate does not overlap with the functional area.
[0032] In a second aspect, the present application further relates to a projection device, comprising:
[0033] The light engine according to any one of the above embodiments.
[0034] The projection device provided by the embodiments of the present application has the light engine as described in any one of the above embodiments, the substrate of the wavelength conversion module in the projection device provided by the embodiments of the present application is arranged in a translatable manner on the light path of the excitation light, so that the excitation light can be sequentially incident on the functional areas located at different positions of the substrate, and compared with the existing fluorescent wheel module, the volume of the wavelength conversion module in the present application is reduced, thereby facilitating the reduction of the overall volume of the light engine. BRIEF DESCRIPTION OF DRAWINGS
[0035] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly introduced. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort.
[0036] Figure 1 is a structure and an optical path schematic diagram of an optical machine of the first embodiment of the present application.
[0037] Figure 2 is a plane schematic diagram of a wavelength conversion module of the optical machine of the first embodiment of the present application.
[0038] Figure 3 is a side view schematic diagram of the wavelength conversion module of the optical machine of the first embodiment of the present application.
[0039] Figure 4 is a partial optical path schematic diagram of the wavelength conversion module of the optical machine of the first embodiment of the present application, which is provided with a first reflection layer and a first anti-reflection layer.
[0040] Figure 5 is a side view schematic diagram of the wavelength conversion module of the optical machine of the first embodiment of the present application, which is provided with a light transmission plate.
[0041] Figure 6 is a structure and an optical path schematic diagram of an optical machine of the second embodiment of the present application.
[0042] Figure 7 is a plane schematic diagram of a wavelength conversion module of the optical machine of the second embodiment of the present application.
[0043] Figure 8 is a partial optical path schematic diagram of the optical machine of the second embodiment of the present application, in which a transmission-reflection element is provided with a second reflection layer.
[0044] Figure 9 is a structure and an optical path schematic diagram of an optical machine of the third embodiment of the present application.
[0045] Figure 10 is a plane schematic diagram of a wavelength conversion module of the optical machine of the third embodiment of the present application.
[0046] Figure 11 is a schematic diagram of a projection device in an embodiment of the present application.
[0047] Main element symbol explanation:
[0048] Optical machine 100, 200, 300
[0049] Light source module 1
[0050] Laser 11
[0051] Wavelength conversion module 2
[0052] Substrate 21
[0053] Functional area 210
[0054] Wavelength conversion area 211
[0055] Wavelength conversion layer 22
[0056] First wavelength conversion layer 22a
[0057] Second wavelength conversion layer 22b
[0058] First reflective layer 23
[0059] First antireflection layer 24
[0060] Light-transmitting plate 25
[0061] Transmissive area 26
[0062] Reflective area 27
[0063] Heat dissipation element 28
[0064] Color filter element 3
[0065] Light guiding module 4
[0066] First light collecting element 41
[0067] Transflective element 42
[0068] First surface 421
[0069] Second reflective layer 4211
[0070] Second surface 422
[0071] Phase delay element 43
[0072] Light collecting module 5
[0073] Control module 6
[0074] Projection device 900
[0075] Optical axis direction Z
[0076] First direction X
[0077] Second direction Y
[0078] Excitation light L1
[0079] Stimulated light L2
[0080] The following detailed description will further illustrate the present application in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION
[0081] The technical solutions in the embodiments of the present application will be clearly and completely described in connection with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the scope of protection of the present application.
[0082] It should be noted that when a component is referred to as being "fixed" to another component, it can be directly on the other component or there can be intervening components. When a component is referred to as being "connected" to another component, it can be directly connected to the other component or there can be intervening components. The terms "vertical", "horizontal", "left", "right", and similar terms as used herein are for purposes of illustration and description only and are not intended to limit the scope of the application.
[0083] It should be noted that the terms "first", "second", and the like in the present application are only used to distinguish different devices, modules or units, and are not intended to limit the order or interdependence of the functions performed by these devices, modules or units.
[0084] Embodiments one to three of the present application provide an optical machine, and embodiment four provides a projection device.
[0085] Embodiment one
[0086] Please refer to Figure 1 and Figure 2 The optical machine 100 provided by the embodiment one of the present application includes a light source module 1 and a wavelength conversion module 2. The light source module 1 is used to emit excitation light L1. The wavelength conversion module 2 includes a substrate 21, and the substrate 21 includes a plurality of functional areas 210. The substrate 21 is arranged on the light path of the excitation light L1 in a translatable manner, so that the excitation light L1 can be sequentially incident on the functional areas 210 located at different positions of the substrate 21.
[0087] The optical machine 100 provided by the embodiment one of the present application, compared with the prior art, the substrate 21 of the wavelength conversion module 2 in the optical machine 100 of the embodiment of the present application is arranged on the light path of the excitation light L1 in a translatable manner, so that the excitation light L1 can be sequentially incident on the functional areas 210 located at different positions of the substrate 21. It is not necessary to set a rotating disc to rotate, which is beneficial to reduce the volume of the wavelength conversion module 2, thereby being beneficial to reduce the overall volume of the optical machine 100. At the same time, it is not necessary to set a motor to drive the wavelength conversion module 2 to rotate, thereby being beneficial to reduce the overall volume of the projection device (not shown in the figure) using the optical machine 100.
[0088] The light source module 1 comprises a laser 11 configured to emit excitation light L1 having a first wavelength. In the embodiment, the laser 11 comprises a blue laser diode (not shown in the figure) configured to emit excitation light L1 having the first wavelength, i.e. blue laser light. The wavelength of the excitation light L1 ranges from 405 nm to 465 nm, and specifically, the wavelength of the excitation light L1 can be any value in the range from 405 nm to 420 nm, from 420 nm to 440 nm, or from 440 nm to 465 nm. In other embodiments, the laser 11 can comprise any one or a combination of red laser diodes, green laser diodes, and yellow laser diodes.
[0089] The substrate 21 is made of a light-transmissive material, which can be any one of glass and sapphire.
[0090] In some embodiments, referring to Figure 1 , Figure 2 and Figure 3 , the plurality of functional areas 210 of the substrate 21 comprises a wavelength conversion area 211. The wavelength conversion module 2 comprises a wavelength conversion layer 22 arranged on the wavelength conversion area 211. The wavelength conversion layer 22 is arranged on the side surface of the substrate 21 away from the light source module 1. The substrate 21 is capable of transmitting the excitation light L1 to the wavelength conversion layer 22, for example, the material of the substrate 21 is a light-transmissive material, thereby realizing the transmission of the excitation light L1. The wavelength conversion layer 22 is configured to convert the excitation light L1 into the stimulated light L2. The material of the wavelength conversion layer 22 is a fluorescent powder or a fluorescent ceramic material, for example, the material of the wavelength conversion layer 22 can be a yellow yttrium aluminum garnet doped with trivalent cerium; alternatively, the material of the wavelength conversion layer 22 can also be any one of an oxide ceramic material, a nitride ceramic material, and an oxynitride ceramic material, which is not limited in the present application.
[0091] Specifically, the wavelength conversion module 2 comprises at least two wavelength conversion layers 22, and the specific number of the wavelength conversion layers 22 comprised by the wavelength conversion module 2 is set according to the color type of the stimulated light L2 to be converted, which is not limited in the present application.
[0092] Taking the wavelength conversion module 2 comprising two wavelength conversion layers 22 as an example, the two wavelength conversion layers 22 are respectively a first wavelength conversion layer 22a and a second wavelength conversion layer 22b. The first wavelength conversion layer 22a and the second wavelength conversion layer 22b are arranged on the side surface of the substrate 21 away from the light source module 1. The first wavelength conversion layer 22a and the second wavelength conversion layer 22b located at different positions on the substrate 21 are configured to sequentially receive the excitation light L1 and emit the stimulated light L2 after converting the excitation light L1 into the stimulated light L2.
[0093] Further, the wavelengths of the stimulated light L2 emitted by the two wavelength conversion layers 22 are different, i.e. the wavelengths of the stimulated light L2 emitted by the first wavelength conversion layer 22a and the second wavelength conversion layer 22b are different. Specifically, for example, when the excitation light L1 is blue light and the material of the first wavelength conversion layer 22a is a red fluorescent material, the first wavelength conversion layer 22a is configured to convert the blue excitation light L1 into red stimulated light L2 and emit the red stimulated light L2; when the excitation light L1 is blue light and the material of the second wavelength conversion layer 22b is a green fluorescent material, the second wavelength conversion layer 22b is configured to convert the blue excitation light L1 into green stimulated light L2 and emit the green stimulated light L2. In some embodiments, the wavelengths of the stimulated light L2 emitted by the plurality of wavelength conversion layers 22 can also be the same, i.e. the colors of the stimulated light L2 emitted by the plurality of wavelength conversion layers 22 can also be the same, which is not limited in the present application. By arranging the plurality of wavelength conversion layers 22, it is beneficial to obtain a plurality of different colors of stimulated light L2 by using one color of excitation light L1, which is beneficial to reduce the cost of the light machine 100 and further reduce the volume of the light machine 100 compared with using a multi-color laser as the light source of the light machine 100.
[0094] In some embodiments, referring to Figure 1 , Figure 2 and Figure 4 , the wavelength conversion module 2 further comprises a first reflective layer 23 arranged on the wavelength conversion region 211. The first reflective layer 23 is attached to the two side surfaces of the substrate 21 adjacent to the wavelength conversion layer 22. The first reflective layer 23 is configured to reflect the stimulated light L2 emitted by the wavelength conversion layer 22 to the first reflective layer 23, so that the stimulated light L2 is emitted in a direction away from the light source module 1 towards the substrate 21. By arranging the first reflective layer 23, it is beneficial to emit the stimulated light L2 in a direction away from the light source module 1 towards the substrate 21, which is beneficial to reduce the loss of light energy of the stimulated light L2 and improve the brightness of the stimulated light L2.
[0095] In some embodiments, the wavelength conversion module 2 further comprises two first anti-reflection layers 24. One first anti-reflection layer 24 is directly attached to one side surface of the substrate 21 close to the light source module 1, and the other first anti-reflection layer 24 is directly attached to one side surface of the substrate 21 away from the light source module 1 and is arranged in a stack with the first reflective layer 23 and the wavelength conversion layer 22. The first anti-reflection layer 24 is configured to increase the transmittance of the excitation light L1 emitted from the light source module 1 on the substrate 21, so that the excitation light L1 transmits through the substrate 21 and is incident on the wavelength conversion layer 22.
[0096] In some embodiments, referring to Figure 1 , Figure 2 and Figure 5The wavelength conversion module 2 further comprises a light-transmitting plate 25 which is spaced apart from the substrate 21. The light-transmitting plate 25 is made of a light-transmitting material, which can be any one of glass and sapphire.
[0097] For example, please continue to refer to Figure 1 、 Figure 2 and Figure 5 The wavelength conversion module 2 comprises two wavelength conversion layers 22, i.e. a first wavelength conversion layer 22a and a second wavelength conversion layer 22b. The first wavelength conversion layer 22a and the second wavelength conversion layer 22b are arranged at different positions between the substrate 21 and the light-transmitting plate 25, and are attached to the two adjacent side surfaces of the substrate 21 and the light-transmitting plate 25. The substrate 21 can transmit the excitation light L1 to the first wavelength conversion layer 22a and the second wavelength conversion layer 22b, and the light-transmitting plate 25 can transmit the excitation light L2 out.
[0098] One of the first anti-reflection layers 24 is directly attached to the side surface of the substrate 21 close to the light source module 1, and the other one of the first anti-reflection layers 24 is directly attached to the side surface of the substrate 21 away from the light source module 1. The first reflective layer 23 is arranged between the first anti-reflection layers 24 and the two wavelength conversion layers 22, which is not limited in the present application. By arranging the light-transmitting plate 25, the two wavelength conversion layers 22 can be arranged between the substrate 21 and the light-transmitting plate 25 after coating the substrate 21 and the light-transmitting plate 25, which is beneficial to reduce the difficulty of adding the first anti-reflection layers 24 and the first reflective layer 23 on the substrate 21.
[0099] In some embodiments, please refer to Figure 1 and Figure 2 The plurality of functional areas 210 further comprises a transmission area 26 which can transmit the excitation light L1 emitted from the light source module 1. The transmission area 26 and the wavelength conversion area 211 are arranged in a matrix on the substrate 21; alternatively, the transmission area 26 and the wavelength conversion area 211 can also be arranged in a circumferential, triangular, annular or irregular manner on the substrate 21, which is not limited in the present application. By arranging the transmission area 26, the side surface of the transmission area 26 close to the light source module 1 is a frosted light-transmitting surface which is used to homogenize the light intensity of the transmitted excitation light L1, so as to improve the uniformity of the image color formed by the excitation light L1.
[0100] In some embodiments, the substrate 21 of the wavelength conversion module 2 is capable of being translated relative to the light source module 1 along at least one direction perpendicular to the optical axis direction Z of the excitation light L1 so as to enable the excitation light L1 to be incident on the functional regions 210 (e.g. the wavelength conversion regions 211 and the transmission regions 26) at different positions on the substrate 21. Specifically, the substrate 21 of the wavelength conversion module 2 is capable of being translated relative to the light source module 1 along a first direction X and a second direction Y perpendicular to the first direction X, both of which are perpendicular to the optical axis direction Z of the excitation light L1, so as to enable the excitation light L1 to be incident on the functional regions 210 (e.g. the wavelength conversion regions 211 and the transmission regions 26) at different positions on the substrate 21. Alternatively, the substrate 21 of the wavelength conversion module 2 is capable of being translated relative to the light source module 1 along only one direction perpendicular to the optical axis direction Z of the excitation light L1, without limitation.
[0101] In a comparative example, the existing fluorescent wheel is unable to carry extra heat dissipation components or extra heat dissipation layers to prevent uneven light emission caused by the deviation of the fluorescent wheel. Please refer to Figure 1 and Figure 3 together, the wavelength conversion module 2 of the optical engine 100 according to the embodiments of the present application further comprises a heat dissipation element 28 arranged on the substrate 21, the heat dissipation element 28 is used for dissipating heat from the substrate 21, which can be a heat sink, a heat dissipation layer, etc., without limitation; and the orthographic projection of the heat dissipation element 28 on the substrate 21 does not overlap with the functional regions 210, so as to avoid the functional regions 210 and ensure the normal use of the functional regions 210; alternatively, the heat dissipation element 28 can be arranged on the side of the substrate 21 close to the light source module 1 or on the side of the substrate 21 away from the light source module 1; by arranging the substrate 21 of the wavelength conversion module 2 in the light path of the excitation light L1 in a translatable manner, the heat dissipation element 28 can be carried on the substrate 21 to further improve the heat dissipation effect of the wavelength conversion module 2, thereby further improving the light emitting efficiency of the wavelength conversion module and further improving the brightness of the optical engine 100.
[0102] In some embodiments, please refer to Figure 1 and Figure 2 together, the orthographic projection areas of the at least two functional regions 210 on the substrate 21 are different from each other. Specifically, the orthographic projection areas of the transmission regions 26 and the wavelength conversion regions 211 on the substrate 21 are different from each other. Understandably, when the excitation light L1 is incident on the functional regions 210 at different positions on the substrate 21 in time sequence, by arranging the orthographic projection areas of the at least two functional regions 210 on the substrate 21 to be different from each other, the excitation light L1 has different illumination durations at the functional regions 210 at different positions, thereby controlling the duty cycle of the stimulated light L2 emitted from the different wavelength conversion layers 22 or controlling the duty cycle of the stimulated light L2 emitted from the wavelength conversion regions 211 of the wavelength conversion module 2 or the excitation light L1 emitted from the transmission regions 26.
[0103] In some embodiments, please refer to Figure 1 、 Figure 4 and Figure 5 , the optical machine 100 further comprises a color filter element 3, which is used to filter the excited light L2 after the light L2 is filtered out to reduce the spectral width of the excited light L2. Wherein, the color filter element 3 is arranged on the side of the wavelength conversion module 2 away from the light source module 1. Optionally, when the wavelength conversion module 2 further comprises a light transmission plate 25 arranged spaced apart from the substrate 21, the color filter element 3 is attached to the surface of the light transmission plate 25 away from the light source module 1.
[0104] By arranging the color filter element 3, it is beneficial to reduce the brightness of the color of the excited light L2 emitted from the wavelength conversion module 2, thereby facilitating to reduce the stimulation of the excited light L2 to the human eye, and facilitating to increase the visual saturation when the human eye watches the image picture generated by the excited light L2, and further facilitating to improve the experience of the user.
[0105] In some embodiments, the optical machine 100 further comprises a light guiding module 4 arranged on the light emitting side of the light source module 1, which is used to receive and guide the excitation light L1 to be incident on the wavelength conversion module 2. The light guiding module 4 comprises a first light converging element 41 arranged on the light path of the excitation light L1 and located between the light source module 1 and the wavelength conversion module 2, the first light converging element 41 is used to converge the excitation light L1 to the wavelength conversion module 2; for example, when the excitation light L1 is blue laser, the excitation light L1 is incident on the first light converging element 41, the first light converging element 41 is used to converge the excitation light L1 into a blue light spot and emit to the wavelength conversion module 2.
[0106] In some embodiments, the optical machine 100 further comprises a light converging module 5. The light converging module 5 is arranged on the side of the wavelength conversion module 2 away from the light guiding module 4, and the light converging module 5 is used to receive and converge the excited light L2 emitted from the wavelength conversion module 2. By arranging the light converging module 5, the excited light L2 can be collected and converged by the light converging module 5, which is beneficial to improve the utilization rate of the excited light L2 and reduce the loss of optical energy of the excited light L2.
[0107] In some embodiments, the light machine 100 further comprises a control module 6. The control module 6 is configured to control the duration of the excitation light L1 incident on the functional regions 210 (e.g., the wavelength conversion region 211 and the transmission region 26) at different positions on the substrate 21. Specifically, under the premise that the orthographic projection area of each functional region 210 (e.g., the wavelength conversion region 211 and the transmission region 26) on the substrate 21 is the same, the control module 6 controls the dwell time of the excitation light L1 incident on the functional regions 210 (e.g., the wavelength conversion region 211 and the transmission region 26) at different positions on the substrate 21 by controlling the speed of the wavelength conversion module 2 relative to the light source module 1, thereby controlling the duty cycle of the stimulated light L2 or the excitation light L1 emitted from different functional regions 210 (e.g., the wavelength conversion region 211 and the transmission region 26).
[0108] Embodiment Two
[0109] For a better understanding of the present application, please refer to Figure 6 and Figure 7 Embodiment Two provides a light machine 200 which is different from Embodiment One in that the substrate 21 of the wavelength conversion module 2 is capable of reflecting the excitation light L1, for example, the substrate 21 is formed of a light-proof material, such as metal, heat-conducting silica gel, heat-conducting silicone grease, and heat-conducting graphite, etc. At least two wavelength conversion layers 22 are arranged on the side surface of the substrate 21 close to the light source module 1. The color filter element 3 is arranged on the side of the wavelength conversion module 2 close to the light source module 1. The light collection module 5 is arranged between the wavelength conversion module 2 and the light guiding module 4, and the light collection module 5 is configured to receive and converge the stimulated light L2 emitted from the wavelength conversion module 2.
[0110] Compared with the prior art, the wavelength conversion module 2 in the light machine 200 provided by Embodiment Two does not need to be arranged to rotate, which is conducive to reducing the volume of the wavelength conversion module 2, thereby being conducive to reducing the overall volume of the light machine 200; and does not need to be driven by a motor to rotate, which is also conducive to reducing the noise during the operation of the light machine 200, and is conducive to improving the user experience; in addition, the light machine 200 of Embodiment Two can set the substrate 21 as a heat-dissipating material, so as to further improve the heat-dissipating effect of the wavelength conversion module 2, thereby further improving the light-emitting efficiency of the wavelength conversion module, and further improving the brightness of the light machine 200.
[0111] In some embodiments, please refer to Figure 6 , Figure 7 and Figure 8 The light guiding module 4 comprises a transmissive-reflection element 42, which is arranged on the light-emitting side of the light source module 1, and is configured to transmit the excitation light L1 emitted from the light source module 1; and the transmissive-reflection element 42 is also configured to reflect the stimulated light L2 emitted from the wavelength conversion module 2.
[0112] In some embodiments, the transflective element 42 comprises a first surface 421 close to a side of the wavelength conversion module 2, and the first surface 421 is provided with a second reflective layer 4211, and the second reflective layer 4211 is capable of reflecting the stimulated light L2 emitted from the wavelength conversion module 2. By providing the second reflective layer 4211, it is beneficial to reduce the loss of optical energy of the stimulated light L2, and it is beneficial to improve the brightness of the stimulated light L2.
[0113] The transflective element 42 further comprises a second surface 422 opposite to the first surface 421, and an included angle between the second surface 422 and the optical axis direction Z of the excitation light L1 is in a range of 40°-50°. Specifically, the included angle between the second surface 422 and the optical axis direction Z of the excitation light L1 can be any value in a range of 40°-43°, 43°-45°, 45°-47° or 47°-50°, which is not limited in the present application.
[0114] Embodiment Three
[0115] Please refer to Figure 8 and Figure 9 together, the optical-mechanical system 300 provided in the present embodiment three is different from that of the embodiment two in that the light guiding module 4 further comprises a phase delay element 43, and the phase delay element 43 is arranged between the transflective element 42 and the wavelength conversion module 2, and the phase delay element 43 is used for converting the excitation light L1 emitted from the transflective element 42 into first polarized light, and the first polarized light has a first polarization state.
[0116] Please refer to Figure 9 and Figure 10 together, the plurality of functional areas 210 further comprise a reflection area 27, and the reflection area 27 is used for receiving and reflecting the first polarized light. The phase delay element 43 is further used for converting the first polarized light emitted from the reflection area 27 into second polarized light, and the second polarized light has a second polarization state.
[0117] For example, when the excitation light L1 is linearly polarized light with a first polarization direction, the excitation light L1 is incident on the transmissive-reflection element 42 from the light source module 1, the transmissive-reflection element 42 transmits the linearly polarized light with the first polarization direction, and the phase delay element 43 is configured to convert the excitation light L1 out of the transmissive-reflection element 42 into first polarized light, i.e., to convert the linearly polarized light with the first polarization direction into circularly polarized light and then out of the phase conversion module. The reflecting region 27 in the phase conversion module is configured to receive and reflect the excitation light L1 (first polarized light) with the first polarization state of circularly polarized state out of the phase delay element 43, and change the handedness of the excitation light L1 with the circularly polarized state. The excitation light L1 is incident on the phase delay element 43 again, and the phase delay element 43 is further configured to convert the first polarized light out of the reflecting region 27 into second polarized light, i.e., to convert the excitation light L1 with the first polarization state of circularly polarized state into linearly polarized light with a second polarization direction and then out of the transmissive-reflection element 42. The first polarization direction is perpendicular to the second polarization direction.
[0118] The light machine 300 provided in the third embodiment of the present application, compared with the light machine 300 using a fluorescent wheel to obtain the excitation light L2, the wavelength conversion module 2 in the light machine 300 provided in the third embodiment of the present application does not need to be provided with a rotating wheel, which is beneficial to reduce the volume of the wavelength conversion module 2, thereby being beneficial to reduce the overall volume of the light machine 300; and does not need to be provided with a motor to drive the wavelength conversion module 2 to rotate, which is also beneficial to reduce the noise during the operation of the light machine 300, and is beneficial to improve the experience of the user.
[0119] Further provided is a projection device. Please refer to Figure 1 and Figure 11 The projection device 900 provided in the third embodiment of the present application comprises the light machine 100 (the light machine 200 or the light machine 300) in any one of the above embodiments. The projection device 900 can be a projector, a projection apparatus, or other electronic devices with a projection function. The projection device 900 can further comprise a main control circuit board (not shown in the figure), and the control module 6 of the light machine 100 (the light machine 200 or the light machine 300) can be used as the main control circuit board, or can be used as an auxiliary circuit board electrically connected to the main control circuit board.
[0120] The projection device 900 provided by the embodiments of the present application is configured with the optical engine 100 (the optical engine 200 or the optical engine 300) of any of the above embodiments. The light guiding module 4 in the optical engine 100 (the optical engine 200 or the optical engine 300) is configured to receive and guide the excitation light L1 emitted from the light source module 1. The wavelength conversion module 2 is arranged in a translatable manner on the light path of the excitation light L1, so that the excitation light L1 sequentially enters different functional areas, and thus the stimulated light L2 can be obtained through the excitation light L1. Compared with the optical engine 100 (the optical engine 200 or the optical engine 300) configured to obtain the stimulated light L2 through the fluorescent wheel, the wavelength conversion module 2 in the projection device 900 provided by the embodiments of the present application is arranged in a translatable manner on the light path of the excitation light L1, and thus the wheel rotation is not required, which is beneficial to reduce the volume of the wavelength conversion module 2, and thus the overall volume of the projection device 900 is reduced.
[0121] The above description is only the embodiments of the present application, and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation, or direct or indirect application in other related technical fields, which is based on the content of the specification and drawings of the present application, is also included in the patent protection scope of the present application.
Claims
1. An optical engine, characterized by, The light machine comprises: a light source module for emitting excitation light; and a wavelength conversion module comprising a substrate, the substrate comprising a plurality of functional regions; wherein the substrate is arranged to be translatable in the optical path of the excitation light so that the excitation light can be sequentially incident on the functional regions located at different positions on the substrate.
2. The optical engine of claim 1, wherein The substrate is translatable relative to the light source module in at least one direction perpendicular to the optical axis of the excitation light so that the excitation light can be incident on the functional regions located at different positions on the substrate.
3. The optical engine of claim 1, wherein The plurality of functional regions comprises a wavelength conversion region; the wavelength conversion module comprises a wavelength conversion layer arranged in the wavelength conversion region, the wavelength conversion layer being used for converting the excitation light into stimulated light; wherein the wavelength conversion layer is arranged on a side surface of the substrate away from the light source module, and the substrate is capable of transmitting the excitation light to the wavelength conversion layer; or The wavelength conversion module further comprises a light-transmitting plate arranged spaced apart from the substrate; the wavelength conversion layer is attached to two side surfaces adjacent to the substrate and the light-transmitting plate, the substrate is capable of transmitting the excitation light to the wavelength conversion layer, and the light-transmitting plate is capable of transmitting the stimulated light out; or The substrate is capable of reflecting the excitation light, and at least two wavelength conversion layers are arranged on a side surface of the substrate close to the light source module.
4. The optical engine of claim 3, wherein The wavelength conversion module further comprises a first reflective layer arranged in the wavelength conversion region; the first reflective layer is attached to two side surfaces adjacent to the substrate and the wavelength conversion layer; The first reflective layer is used for reflecting the stimulated light emitted by the wavelength conversion layer to the first reflective layer so that the stimulated light is emitted in a direction away from the light source module.
5. The optical engine of claim 3, wherein The light machine further comprises a color filter element, which is used for filtering the stimulated light before emitting; wherein the color filter element is arranged on a side of the wavelength conversion module away from the light source module; or When the wavelength conversion module further comprises a light-transmitting plate arranged spaced apart from the substrate, the color filter element is attached to a side surface of the light-transmitting plate away from the light source module; or The color filter element is arranged on a side of the wavelength conversion module close to the light source module.
6. The optical engine of claim 1, wherein, The plurality of functional regions further comprises a transmission region capable of transmitting the excitation light emitted from the light source module.
7. The optical engine of claim 1, wherein The light machine further comprises a light guiding module arranged on the light emitting side of the light source module for receiving and guiding the excitation light incident on the wavelength conversion module.
8. The optical engine of claim 7, wherein, The light guiding module comprises a transreflective element arranged on the light emitting side of the light source module, the transreflective element being used for transmitting the excitation light emitted from the light source module; the transreflective element is also used for reflecting the stimulated light emitted from the wavelength conversion module.
9. The optical engine of claim 8, wherein, The transreflective element comprises a first surface close to the wavelength conversion module, the first surface being provided with a second reflective layer capable of reflecting the stimulated light emitted from the wavelength conversion module.
10. The optical engine of claim 9, wherein, The trans-reflection element further comprises a second surface opposite to the first surface, and an included angle between the second surface and the optical axis direction of the excitation light ranges from 40° to 50°.
11. The optical engine of claim 8, wherein, The light guiding module further comprises a phase delay element, which is arranged between the trans-reflection element and the wavelength conversion module, and is configured to convert the excitation light emitted by the trans-reflection element into first polarized light having a first polarization state. The plurality of functional areas further comprises a reflection area, which is configured to receive and reflect the first polarized light. The phase delay element is further configured to convert the first polarized light emitted by the reflection area into second polarized light having a second polarization state.
12. The optical engine of claim 7, wherein, The optical machine further comprises a light collecting module. The light collecting module is arranged between the wavelength conversion module and the light guiding module, and is configured to receive and converge the stimulated light emitted by the wavelength conversion module; or The light collecting module is arranged on a side of the wavelength conversion module away from the light guiding module, and is configured to receive and converge the stimulated light emitted by the wavelength conversion module.
13. The optical engine according to any one of claims 1 to 12, wherein The normal projection areas of the at least two functional areas on the substrate are different from each other; and / or The wavelength conversion module further comprises a heat dissipation element arranged on the substrate, and a normal projection of the heat dissipation element on the substrate does not overlap with the functional area.
14. A projection apparatus, characterized by, The optical machine comprises: The optical machine according to any one of claims 1-13.