Light machine and projection equipment
By using a translatable wavelength conversion module substrate in the laser projection device, the problem of large space occupied by the fluorescent wheel module is solved, and the overall volume of the optical machine and the noise reduction are achieved.
Patent Information
- Application Number
- CN202411998924.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-31
- Publication Date
- 2025-03-11
AI Technical Summary
In existing laser projection equipment, the fluorescent wheel module occupies a large amount of space, resulting in a large overall size of the optical machine.
An optical machine is designed, and its wavelength conversion module is arranged on the optical path of the excitation light using a translatable substrate, so that the excitation light is incident on the functional areas of different positions of the substrate in time, replacing the traditional fluorescent wheel module.
By reducing the volume of the wavelength conversion module, the overall volume of the optical machine is reduced, while avoiding the noise problems of roulette rotation and motor driving, improving the user experience.
Smart Images
Figure CN119596627A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of projection technology, and in particular to an optical engine and a projection device including the optical engine. Background Art
[0002] Current laser projection equipment still uses a monochromatic laser diode as the main light source. By irradiating the light emitted by the monochromatic laser diode onto a rotating fluorescent wheel module, multiple beams of light with different wavelengths are obtained. However, the existing fluorescent wheel module greatly increases the overall volume of the optical machine. For example, the diameter of the wheel disc of the fluorescent wheel module is often as high as 100mm. For example, the motor in the fluorescent wheel module that drives the wheel disc to rotate continuously also takes up a lot of space in the optical machine. Summary of the Invention
[0003] The present application discloses an optical machine and a projection device, which are conducive to reducing the overall volume of the optical machine.
[0004] In a first aspect, the present application relates to an optical machine, comprising:
[0005] A light source module, configured to emit excitation light; and
[0006] A wavelength conversion module includes a substrate, wherein the substrate includes a plurality of functional areas;
[0007] The substrate can be arranged in a translational manner on the optical path of the excitation light, so that the excitation light can be incident on the functional areas located at different positions of the substrate in a time sequence.
[0008] Compared with the prior art, the optical machine provided in the embodiment of the present application has a substrate of a wavelength conversion module in the optical machine in a translatably arranged manner on the optical path of the excitation light, so that the excitation light can be incident on the functional areas located at different positions of the substrate in a time sequence. Compared with the existing fluorescent wheel module, the volume of the wavelength conversion module in the present application is reduced, which is conducive to reducing the overall volume of the optical machine.
[0009] In one 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 on the substrate.
[0010] In one embodiment, the plurality of functional areas include a wavelength conversion area; the wavelength conversion module includes a wavelength conversion layer disposed in the wavelength conversion area, the wavelength conversion layer being configured to convert the excitation light into converted light;
[0011] The wavelength conversion layer is provided on a surface of the substrate away from the light source module, and the substrate is capable of allowing the excitation light to transmit to the wavelength conversion layer; or
[0012] The wavelength conversion module further includes a light-transmitting plate spaced apart from the substrate; the wavelength conversion layer is attached to the adjacent two surfaces of the substrate and the light-transmitting plate, the substrate can allow the excitation light to be transmitted to the wavelength conversion layer, and the light-transmitting plate can allow the converted light to be transmitted out; or,
[0013] The substrate is capable of reflecting the excitation light, and the at least two wavelength conversion layers are arranged on a surface of one side of the substrate close to the light source module.
[0014] In one embodiment, the wavelength conversion module further includes a first reflective layer disposed in the wavelength conversion region; the first reflective layer is attached to adjacent two surfaces of the substrate and the wavelength conversion layer;
[0015] The first reflective layer is used to reflect the converted light emitted from the wavelength conversion layer to the first reflective layer, so that the converted light is emitted toward the substrate in a direction away from the light source module.
[0016] In one embodiment, the optical engine further includes a color filter element, which is used to filter the converted light before emitting the converted light; 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 includes a light-transmitting plate spaced apart from the substrate, the color filter element is attached to a surface of the light-transmitting plate that is 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 one embodiment, the plurality of functional areas further include a transmission area, and the transmission area is capable of transmitting the excitation light emitted from the light source module.
[0020] In one embodiment, the optical machine further includes a light guiding module, which is disposed on the light output side of the light source module and is configured to receive and guide the excitation light to be incident on the wavelength conversion module.
[0021] In one embodiment, the light guiding module includes a transflective element, which is arranged on the light output side of the light source module, and is used to transmit the excitation light emitted from the light source module; the transflective element is also used to reflect the stimulated light emitted from the wavelength conversion module.
[0022] In one embodiment, the transflective element includes a first surface close to the wavelength conversion module. The first surface is provided with a second reflective layer. The second reflective layer can reflect the converted light emitted from the wavelength conversion module.
[0023] In one embodiment, the transflective element further includes a second surface opposite to the first surface, and an angle between the second surface and the optical axis direction of the excitation light is in a range of 40°-50°.
[0024] In one embodiment, the light guiding module further includes a phase delay element, which is disposed between the transflective element and the wavelength conversion module, and is configured to convert the excitation light emitted by the transflective element into a first polarized light having a first polarization state.
[0025] The plurality of functional areas further include a reflective area, wherein the reflective 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 from the reflective region into second polarized light, where the second polarized light has a second polarization state.
[0027] In one embodiment, the optical engine further includes a light collecting module;
[0028] Wherein, the light collecting module is provided between the wavelength conversion module and the light guiding module, and the light collecting module is used to receive and converge the converted light emitted from 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 is used for receiving and converging the converted light emitted from the wavelength conversion module.
[0030] In one embodiment, orthographic projection areas of at least two of the functional regions on the substrate are different from each other.
[0031] In one embodiment, the wavelength conversion module further includes a heat dissipation element disposed on the substrate, and an orthographic projection of the heat dissipation element on the substrate does not overlap with the functional area.
[0032] In a second aspect, the present application also relates to a projection device, comprising:
[0033] An optical machine as described in any of the above embodiments.
[0034] The projection device provided by the embodiment of the present application is provided with an optical machine as described in any of the above embodiments. The substrate of the wavelength conversion module in the projection device provided by the embodiment of the present application is arranged in a translatable manner on the optical path of the excitation light, so that the excitation light can be incident on the functional areas located at different positions of the substrate in a time sequence. Compared with the existing fluorescent wheel module, the volume of the wavelength conversion module in the present application is reduced, which is beneficial to reducing the overall volume of the optical machine. BRIEF DESCRIPTION OF THE DRAWINGS
[0035] In order to more clearly illustrate the technical solutions in the embodiments of the present application, a brief introduction will be given below to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.
[0036] Figure 1 This is a schematic diagram of the structure and optical path of the optical machine of Example 1 of the present application.
[0037] Figure 2 It is a planar schematic diagram of the wavelength conversion module of the optical machine according to the first embodiment of the present application.
[0038] Figure 3 It is a side view schematic diagram of the wavelength conversion module of the optical machine according to the first embodiment of the present application.
[0039] Figure 4 This is a partial optical path diagram when the wavelength conversion module of the optical machine of the first embodiment of the present application is provided with a first reflective layer and a first anti-reflection layer.
[0040] Figure 5 It is a side view schematic diagram of the wavelength conversion module of the optical machine in the first embodiment of the present application when a light-transmitting plate is provided.
[0041] Figure 6 This is a schematic diagram of the structure and optical path of the optical machine of Example 2 of the present application.
[0042] Figure 7 It is a planar schematic diagram of the wavelength conversion module of the optical machine in the second embodiment of the present application.
[0043] Figure 8 This is a partial optical path diagram when the transflective element of the optical machine of the second embodiment of the present application is provided with a second reflective layer.
[0044] Figure 9 This is a schematic diagram of the structure and optical path of the optical machine of Example 3 of the present application.
[0045] Figure 10 It is a planar schematic diagram of the wavelength conversion module of the optical machine in embodiment 3 of the present application.
[0046] Figure 11 Schematic diagram of a projection device in one embodiment of the present application.
[0047] Description of main component symbols:
[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 region 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 anti-reflection layer 24
[0060] Translucent plate 25
[0061] Transmission area 26
[0062] Reflection Zone 27
[0063] Heat dissipation element 28
[0064] Color filter element 3
[0065] Light guide module 4
[0066] First concentrating element 41
[0067] Transflective element 42
[0068] First side 421
[0069] Second reflective layer 4211
[0070] Second side 422
[0071] Phase delay element 43
[0072] Light collecting module 5
[0073] Control module 6
[0074] Projection equipment 900
[0075] Optical axis direction Z
[0076] First direction X
[0077] Second direction Y
[0078] Excitation light L1
[0079] Stimulating light L2
[0080] The following specific embodiments will further illustrate the present invention in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION
[0081] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.
[0082] It should be noted that when a component is referred to as being "fixed to" another component, it may be directly attached to the other component or there may be a central component. When a component is referred to as being "connected to" another component, it may be directly connected to the other component or there may be a central component. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only.
[0083] It should be noted that the concepts of "first" and "second" mentioned in this application are only used to distinguish different devices, modules or units, and are not used to limit the order or interdependence of the functions performed by these devices, modules or units.
[0084] Embodiments 1 to 3 of the present application provide an optical machine, and embodiment 4 provides a projection device.
[0085] Example 1
[0086] Please also refer to Figure 1 and Figure 2 The optical engine 100 provided in the first embodiment 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, which includes multiple functional areas 210. The substrate 21 is arranged to be translatably disposed on the optical path of the excitation light L1, so that the excitation light L1 can be incident on the functional areas 210 located at different positions on the substrate 21 in a time sequence.
[0087] Compared with the prior art, the optical machine 100 provided in the first embodiment of the present application has a substrate 21 of the wavelength conversion module 2 in the optical machine 100 of the embodiment of the present application that is arranged in a translatable manner on the optical path of the excitation light L1, so that the excitation light L1 can be incident on the functional areas 210 located at different positions of the substrate 21 in a time sequence. There is no need to set a wheel to rotate, which is beneficial to reducing the volume of the wavelength conversion module 2 and thus the overall volume of the optical machine 100. At the same time, there is no need to set a motor to drive the wavelength conversion module 2 to rotate, which is beneficial to reducing the overall volume of the projection equipment (not shown) using the optical machine 100.
[0088] The light source module 1 includes a laser 11, which is used to emit excitation light L1 having a first wavelength. In this embodiment, the laser 11 includes a blue laser diode (not shown), which is used to emit excitation light L1 having a first wavelength, that is, to emit blue laser. The wavelength range of the excitation light L1 is 405nm-465nm. Specifically, the wavelength of the excitation light L1 can be any value in the range of 405nm-420nm, 420nm-440nm or 440nm-465nm. In other embodiments. The laser 11 can also include 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-transmitting material, and the light-transmitting material of the substrate 21 can be any one of glass and sapphire.
[0090] In some embodiments, please refer to Figure 1 、 Figure 2 and Figure 3 , the multiple functional areas 210 of the substrate 21 include a wavelength conversion area 211. The wavelength conversion module 2 includes a wavelength conversion layer 22 arranged in 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 can allow the excitation light L1 to be transmitted to the wavelength conversion layer 22. For example, the material of the substrate 21 is a light-transmitting material, thereby realizing the transmission of the excitation light L1. The wavelength conversion layer 22 is used to convert the excitation light L1 into the stimulated light L2. The material of the wavelength conversion layer 22 is a phosphor or a fluorescent ceramic material. For example, the material of the wavelength conversion layer 22 can be yellow yttrium aluminum garnet doped with trivalent cerium; optionally, the material of the wavelength conversion layer 22 can also be any one of an oxide ceramic material, a nitride ceramic material and a nitride oxide ceramic material, which is not limited in this application.
[0091] Specifically, the wavelength conversion module 2 includes at least two wavelength conversion layers 22. The specific number of wavelength conversion layers 22 included in the wavelength conversion module 2 is set according to the color type of the converted light L2 that needs to be converted, and this application does not limit it.
[0092] For example, the wavelength conversion module 2 includes two wavelength conversion layers 22. These two wavelength conversion layers 22 are a first wavelength conversion layer 22a and a second wavelength conversion layer 22b. The first and second wavelength conversion layers 22a and 22b are disposed on a surface of the substrate 21 that is distal from the light source module 1. These first and second wavelength conversion layers 22a and 22b, located at different locations on the substrate 21, are configured to sequentially receive the excitation light L1 and convert the excitation light L1 into converted light L2, which is then emitted as the converted light L2.
[0093] Furthermore, the wavelengths of the converted light L2 emitted by the two wavelength conversion layers 22 are different, that is, the wavelengths of the converted 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 used to convert the blue excitation light L1 into red converted light L2 and emit red converted 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 used to convert the blue excitation light L1 into green converted light L2 and emit green converted light L2. In some embodiments, the wavelengths of the converted light L2 emitted by multiple wavelength conversion layers 22 can also be the same, that is, the colors of the converted light L2 emitted by multiple wavelength conversion layers 22 can also be the same, which is not limited in this application. By setting up multiple wavelength conversion layers 22, it is beneficial to obtain multiple different colors of converted light L2 through one color of excitation light L1. Compared with the optical machine 100 using multi-color laser as the light source, it is beneficial to reduce the cost of the optical machine 100 and further reduce the volume of the optical machine 100.
[0094] In some embodiments, please refer to Figure 1 、 Figure 2 and Figure 4 The wavelength conversion module 2 also includes a first reflective layer 23 disposed in the wavelength conversion region 211. The first reflective layer 23 is attached to the adjacent surfaces of the substrate 21 and the wavelength conversion layer 22. The first reflective layer 23 is configured to reflect the converted light L2 emitted from the wavelength conversion layer 22 to the first reflective layer 23, thereby directing the converted light L2 toward the substrate 21, away from the light source module 1. The provision of the first reflective layer 23 facilitates directing the converted light L2 toward the substrate 21, away from the light source module 1, thereby reducing optical energy loss of the converted light L2 and improving the brightness of the converted light L2.
[0095] In some embodiments, the wavelength conversion module 2 further includes two first anti-reflection layers 24. One first anti-reflection layer 24 is directly attached to the surface of the substrate 21 near the light source module 1, and the other first anti-reflection layer 24 is directly attached to the surface of the substrate 21 away from the light source module 1 and is stacked with the first reflective layer 23 and the wavelength conversion layer 22. The first anti-reflection layers 24 are used 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 passes through the substrate 21 and is incident on the wavelength conversion layer 22.
[0096] In some embodiments, please refer to Figure 1 、 Figure 2 and Figure 5The wavelength conversion module 2 further includes a light-transmitting plate 25 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, see Figure 1 、 Figure 2 and Figure 5 The wavelength conversion module 2 includes two wavelength conversion layers 22, namely 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 sandwiched between the substrate 21 and the light-transmitting plate 25 at different positions, and are adhered to the adjacent two side surfaces of the substrate 21 and the light-transmitting plate 25. The substrate 21 can allow the excitation light L1 to be transmitted to the first wavelength conversion layer 22a and the second wavelength conversion layer 22b, and the light-transmitting plate 25 can allow the excited light L2 to be transmitted out.
[0098] One first anti-reflection layer 24 is directly attached to the surface of the substrate 21 on the side closest to the light source module 1, and the other first anti-reflection layer 24 is directly attached to the surface of the substrate 21 on the side away from the light source module 1. The first reflective layer 23 is disposed between the first anti-reflection layer 24 and the two wavelength conversion layers 22, which is not limited in this application. By providing the light-transmitting plate 25, the two wavelength conversion layers 22 can be sandwiched between the substrate 21 and the light-transmitting plate 25 after coating them respectively, which helps to reduce the difficulty of adding the first anti-reflection layer 24 and the first reflective layer 23 to the substrate 21.
[0099] In some embodiments, please also refer to Figure 1 and Figure 2 The multiple functional areas 210 also include a transmission area 26, which is capable of transmitting the excitation light L1 emitted from the light source module 1. The transmission areas 26 and the wavelength conversion areas 211 are arranged in rows and columns on the substrate 21; optionally, the transmission areas 26 and the wavelength conversion areas 211 can also be arranged in a circular arrangement, a triangular arrangement, an annular arrangement, or an irregular arrangement on the substrate 21, which is not limited in this application. By providing the transmission area 26, the surface of the transmission area 26 on the side close to the light source module 1 is a frosted light-transmitting surface. The frosted light-transmitting surface is used to even out the light intensity of the transmitted excitation light L1, thereby improving the uniformity of the color of the image formed by the excitation light L1.
[0100] In some embodiments, the substrate 21 of the wavelength conversion module 2 can be 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 that the excitation light L1 can be incident on the functional areas 210 located at different positions on the substrate 21 (for example, the wavelength conversion area 211 and the transmission area 26 located at different positions). Specifically, the substrate 21 of the wavelength conversion module 2 can be translated relative to the light source module 1 along a first direction X and a second direction Y perpendicular to the first direction X, and the first direction X and the second direction Y are both perpendicular to the optical axis direction Z of the excitation light L1, so that the excitation light L1 is incident on the functional areas 210 located at different positions on the substrate 21 (for example, the wavelength conversion area 211 and the transmission area 26 located at different positions). Optionally, the substrate 21 of the wavelength conversion module 2 can only be translated relative to the light source module 1 along a direction perpendicular to the optical axis direction Z of the excitation light L1, which is not limited in this application.
[0101] In a pair of ratios, the existing fluorescent wheel cannot be equipped with extra heat dissipation components or extra heat dissipation layers to prevent uneven light output caused by its offset. Figure 1 and Figure 3 The wavelength conversion module 2 of the optical machine 100 of the embodiment of the present application also includes a heat dissipation element 28 arranged on the substrate 21. The heat dissipation element 28 is used to dissipate heat to the substrate 21. The heat dissipation element can be a radiator, a heat dissipation layer, etc., which is not specifically limited in this application; and the positive projection of the heat dissipation element 28 on the substrate 21 does not overlap with the functional area 210, so as to avoid the functional area 210 and ensure the normal use of the functional area 210; optionally, 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 away from the light source module 1; by arranging the substrate 21 of the wavelength conversion module 2 in a translatable manner on the optical path of the excitation light L1, the heat dissipation element 28 can be mounted on the substrate 21 to further improve the heat dissipation effect of the wavelength conversion module 2, thereby further improving the luminous efficiency of the wavelength change module, and further improving the brightness of the optical machine 100.
[0102] In some embodiments, please also refer to Figure 1 and Figure 2 , the orthographic projection areas of at least two functional regions 210 on the substrate 21 are different from each other. Specifically, the orthographic projection areas of the transmissive region 26 and the wavelength conversion region 211 on the substrate 21 are different from each other. Understandably, when the excitation light L1 is incident on the functional regions 210 located at different positions on the substrate 21 in a time sequence, by setting the orthographic projection areas of at least two functional regions 210 on the substrate 21 to be different, the excitation light L1 has different irradiation durations on the functional regions 210 located at different positions, thereby controlling the duty cycle of the converted light L2 emitted from different wavelength conversion layers 22, or controlling the duty cycle of the converted light L2 emitted from the wavelength conversion region 211 of the wavelength conversion module 2 or the excitation light L1 emitted from the transmissive region 26.
[0103] In some embodiments, please also refer to Figure 1 、 Figure 4 and Figure 5 The optical engine 100 further includes a color filter element 3, which is used to filter the converted light L2 before emission to reduce the spectral width of the converted light L2. The color filter element 3 is disposed on a side of the wavelength conversion module 2 that is distal to the light source module 1. Optionally, when the wavelength conversion module 2 further includes a light-transmitting plate 25 spaced apart from the substrate 21, the color filter element 3 is attached to a surface of the light-transmitting plate 25 that is distal to the light source module 1.
[0104] By setting the color filter element 3, it is beneficial to reduce the brightness of the color of the converted light L2 emitted from the wavelength conversion module 2, thereby reducing the stimulation of the converted light L2 to the human eye, and increasing the visual saturation of the human eye when viewing the image generated by the converted light L2, thereby improving the user experience.
[0105] In some embodiments, the optical engine 100 further includes a light guiding module 4, which is disposed on the light-emitting side of the light source module 1 and is configured to receive and guide the excitation light L1 to be incident on the wavelength conversion module 2. The light guiding module 4 includes a first light-concentrating element 41, which is disposed on the optical path of the excitation light L1 and located between the light source module 1 and the wavelength conversion module 2. The first light-concentrating element 41 is configured to converge the excitation light L1 onto the wavelength conversion module 2. For example, when the excitation light L1 is a blue laser, the excitation light L1 is incident on the first light-concentrating element 41, which is configured to converge the excitation light L1 into a blue light spot and emit it to the wavelength conversion module 2.
[0106] In some embodiments, the optical engine 100 further includes a light collecting module 5. The light collecting module 5 is disposed on a side of the wavelength conversion module 2 away from the light guiding module 4. The light collecting module 5 is configured to receive and converge the converted light L2 emitted from the wavelength conversion module 2. The provision of the light collecting module 5 allows the converted light L2 to be collected and converged by the light collecting module 5, thereby improving the utilization rate of the converted light L2 and reducing the optical energy loss of the converted light L2.
[0107] In some embodiments, the optical engine 100 further includes 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) located at different positions on the substrate 21. Specifically, assuming 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 speed at which the wavelength conversion module 2 translates relative to the light source module 1 to control the residence time of the excitation light L1 incident on the functional regions 210 located at different positions on the substrate 21, 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] Example 2
[0109] Please also refer to Figure 6 and Figure 7 The optical machine 200 provided in the second embodiment differs from that in the first embodiment 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-opaque material, thereby realizing the reflection of the excitation light L1. The light-opaque material of the substrate 21 includes heat dissipation materials such as metal, thermally conductive silicone, thermally conductive silicone grease, and thermally conductive graphite. At least two wavelength conversion layers 22 are arranged on the surface of one side 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 collecting module 5 is arranged between the wavelength conversion module 2 and the light guiding module 4, and the light collecting module 5 is used to receive and converge the excited light L2 emitted from the wavelength conversion module 2.
[0110] The optical machine 200 provided in the second embodiment of the present application, compared with the prior art, does not require a rotary disk to be set for the wavelength conversion module 2 in the optical machine 200, which is beneficial to reducing the volume of the wavelength conversion module 2, thereby reducing the overall volume of the optical machine 200; and does not require a motor to drive the wavelength conversion module 2 to rotate, which is also beneficial to reducing the noise during the operation of the optical machine 200 and improving the user experience; in addition, the optical machine 200 in the second embodiment of the present application can set the substrate 21 as a heat dissipation material to further improve the heat dissipation effect of the wavelength conversion module 2, thereby further improving the luminous efficiency of the wavelength change module, and further improving the brightness of the optical machine 200.
[0111] In some embodiments, please also refer to Figure 6 、 Figure 7 and Figure 8 The light guiding module 4 includes a transflective element 42, which is arranged on the light-emitting side of the light source module 1. The transflective element 42 is used to transmit the excitation light L1 emitted from the light source module 1; the transflective element 42 is also used to reflect the stimulated light L2 emitted from the wavelength conversion module 2.
[0112] In some embodiments, the transflective element 42 includes a first surface 421 located near the wavelength conversion module 2. A second reflective layer 4211 is disposed on the first surface 421. The second reflective layer 4211 is capable of reflecting the converted light L2 emitted from the wavelength conversion module 2. The provision of the second reflective layer 4211 helps reduce optical energy loss of the converted light L2 and improves the brightness of the converted light L2.
[0113] The transflective element 42 also includes a second surface 422 opposite to the first surface 421. The angle between the second surface 422 and the optical axis direction Z of the excitation light L1 is in the range of 40°-50°. Specifically, the angle between the second surface 422 and the optical axis direction Z of the excitation light L1 can be any value in the range of 40°-43°, 43°-45°, 45°-47° or 47°-50°, and this application is not limited thereto.
[0114] Example 3
[0115] Please also refer to Figure 8 and Figure 9 The difference between the optical machine 300 provided in the third embodiment and the second embodiment is that the light guiding module 4 also includes a phase delay element 43, which is arranged between the transflective element 42 and the wavelength conversion module 2. The phase delay element 43 is used to convert the excitation light L1 emitted by the transflective element 42 into a first polarized light, and the first polarized light has a first polarization state.
[0116] Please also refer to Figure 9 and Figure 10 The plurality of functional areas 210 further include a reflective area 27 for receiving and reflecting the first polarized light. The phase delay element 43 is further configured to convert the first polarized light emitted from the reflective area 27 into a second polarized light having a second polarization state.
[0117] For example, when the excitation light L1 is a linearly polarized light having a first polarization direction, the excitation light L1 is incident from the light source module 1 to the transflective element 42, and the transflective element 42 transmits the linearly polarized light having the first polarization direction. The phase delay element 43 is used to convert the excitation light L1 emitted from the transflective element 42 into the first polarized light, that is, to convert the linearly polarized light having the first polarization direction into circularly polarized light and then emit it to the phase conversion module. The reflection area 27 in the phase conversion module is used to receive and reflect the excitation light L1 having the first polarization state as the circular polarization state (the first polarization state) emitted from the phase delay element 43. Light), and changes the rotation direction of the above-mentioned excitation light L1 with a circular polarization state, and the excitation light L1 is incident on the phase delay element 43 again. The phase delay element 43 is also used to convert the first polarized light emitted from the reflection area 27 into a second polarized light. The second polarized light has a second polarization state, that is, the above-mentioned excitation light L1 with a first polarization state as a circular polarization state is converted into a linear polarized light with a second polarization direction and then emitted to the transflective element 42. The transflective element 42 reflects the linear polarized light with the second polarization direction emitted from the phase delay element 43, and the first polarization direction is perpendicular to the second polarization direction.
[0118] Compared with the optical machine 300 that uses a fluorescent wheel to obtain the stimulated light L2, the optical machine 300 provided in the third embodiment of the present application does not require a wheel to rotate in the wavelength conversion module 2, which is beneficial to reducing the volume of the wavelength conversion module 2 and thus the overall volume of the optical machine 300; and does not require a motor to drive the wavelength conversion module 2 to rotate, which is also beneficial to reducing the noise during the operation of the optical machine 300 and improving the user experience.
[0119] A projection device is also available. Figure 1 and Figure 11 The projection device 900 of an embodiment of the present application includes the optical engine 100 (optical engine 200 or optical engine 300) as described in any of the above embodiments. The projection device 900 can be an electronic device with a projection function, such as a projector or an overhead projector. The projection device 900 can also include a main control circuit board (not shown). The control module 6 of the optical engine 100 (optical engine 200 or optical engine 300) can serve as the main control circuit board or as an auxiliary circuit board electrically connected to the main control circuit board.
[0120] The projection device 900 provided in the embodiment of the present application is configured by setting an optical machine 100 (optical machine 200 or optical machine 300) as in any of the above embodiments, wherein the light guiding module 4 in the optical machine 100 (optical machine 200 or optical machine 300) is used to receive and guide the excitation light L1 emitted from the light source module 1, and the wavelength conversion module 2 is arranged in a translatable manner on the optical path of the excitation light L1, so that the excitation light L1 is incident on different functional areas in a time sequence, thereby obtaining the stimulated light L2 through the excitation light L1; compared to the optical machine 100 (optical machine 200 or optical machine 300) that uses a fluorescent wheel to obtain the stimulated light L2, the wavelength conversion module 2 in the projection device 900 provided in the embodiment of the present application is arranged in a translatable manner on the optical path of the excitation light L1, and there is no need to set a wheel rotation, which is beneficial to reducing the volume of the wavelength conversion module 2, thereby helping to reduce the overall volume of the projection device 900.
[0121] The above description is merely an embodiment of the present application and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.
Claims
1. An optical machine, characterized in that: include: A light source module, used for emitting excitation light; as well as A wavelength conversion module comprises a substrate, wherein the substrate comprises a plurality of functional areas; The substrate can be arranged in a translational manner on the optical path of the excitation light, so that the excitation light can be incident on the functional areas located at different positions of the substrate in a time sequence.
2. The optical machine according to claim 1, characterized in that: 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 on the substrate.
3. The optical machine according to claim 1, characterized in that: The plurality of functional areas include a wavelength conversion area; the wavelength conversion module includes a wavelength conversion layer disposed in the wavelength conversion area, and the wavelength conversion layer is used to convert the excitation light into the converted light; Wherein, the wavelength conversion layer is arranged on a surface of the substrate away from the light source module, and the substrate can allow the excitation light to be transmitted to the wavelength conversion layer; or, The wavelength conversion module further includes a light-transmitting plate spaced apart from the substrate; the wavelength conversion layer is attached to the two adjacent surfaces of the substrate and the light-transmitting plate, the substrate can allow the excitation light to be transmitted to the wavelength conversion layer, and the light-transmitting plate can allow the stimulated light to be transmitted out; or, The substrate is capable of reflecting the excitation light, and the at least two wavelength conversion layers are arranged on a surface of one side of the substrate close to the light source module.
4. The optical machine according to claim 3, characterized in that: The wavelength conversion module further includes a first reflective layer disposed in the wavelength conversion region; the first reflective layer is attached to two adjacent surfaces of the substrate and the wavelength conversion layer; The first reflective layer is used to reflect the converted light emitted from the wavelength conversion layer to the first reflective layer, so that the converted light is emitted toward the substrate in a direction away from the light source module.
5. The optical machine according to claim 3, characterized in that: The optical machine further comprises a color filter element, and the color filter element is used to filter the stimulated light and then emit it; 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 includes a light-transmitting plate spaced apart from the substrate, the color filter element is attached to a surface of the light-transmitting plate on a side 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 machine according to claim 1, characterized in that: The plurality of functional areas further include a transmission area, and the transmission area is capable of transmitting the excitation light emitted from the light source module.
7. The optical machine according to claim 1, characterized in that: The optical machine further includes a light guiding module, which is disposed on the light output side of the light source module and is used to receive and guide the excitation light to be incident on the wavelength conversion module.
8. The optical machine according to claim 7, characterized in that: The light guiding module includes a transflective element, which is arranged on the light output side of the light source module and is used to transmit the excitation light emitted from the light source module; the transflective element is also used to reflect the stimulated light emitted from the wavelength conversion module.
9. The optical machine according to claim 8, characterized in that: The transflective element includes a first surface close to a side of the wavelength conversion module, the first surface is provided with a second reflection layer, and the second reflection layer can reflect the converted light emitted from the wavelength conversion module.
10. The optical machine according to claim 9, characterized in that: The transflective element further includes a second surface opposite to the first surface, and an angle between the second surface and the optical axis direction of the excitation light is in a range of 40°-50°.
11. The optical machine according to claim 8, characterized in that: The light guiding module further comprises a phase delay element, which is disposed between the transflective element and the wavelength conversion module, and is used to convert the excitation light emitted by the transflective element into a first polarized light, wherein the first polarized light has a first polarization state; The plurality of functional areas further include a reflection area, and the reflection area is used to receive and reflect the first polarized light; The phase delay element is further used to convert the first polarized light emitted from the reflection area into second polarized light, and the second polarized light has a second polarization state.
12. The optical machine according to claim 7, characterized in that: The optical machine also includes a light collecting module; Wherein, the light collecting module is arranged between the wavelength conversion module and the light guiding module, and the light collecting module is used to receive and converge the converted light emitted from the wavelength conversion module; or The light collecting module is arranged at a side of the wavelength conversion module away from the light guiding module, and is used for receiving and converging the converted light emitted from the wavelength conversion module.
13. The optical machine according to any one of claims 1 to 12, characterized in that: The orthographic projection areas of at least two of the functional areas on the substrate are different from each other; and / or, The wavelength conversion module further includes a heat dissipation element disposed on the substrate, and the orthographic projection of the heat dissipation element on the substrate does not overlap with the functional area.
14. A projection device, characterized in that: include: An optical machine as claimed in any one of claims 1 to 13.