CN111308693A - Filter device, wavelength conversion device, light engine device and projection system - Google Patents
Filter device, wavelength conversion device, light engine device and projection system Download PDFInfo
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- CN111308693A CN111308693A CN202010241013.3A CN202010241013A CN111308693A CN 111308693 A CN111308693 A CN 111308693A CN 202010241013 A CN202010241013 A CN 202010241013A CN 111308693 A CN111308693 A CN 111308693A
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- G—PHYSICS
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- G02B26/00—Optical devices or arrangements for the control of light using movable or deformable optical elements
- G02B26/007—Optical devices or arrangements for the control of light using movable or deformable optical elements the movable or deformable optical element controlling the colour, i.e. a spectral characteristic, of the light
- G02B26/008—Optical devices or arrangements for the control of light using movable or deformable optical elements the movable or deformable optical element controlling the colour, i.e. a spectral characteristic, of the light in the form of devices for effecting sequential colour changes, e.g. colour wheels
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- G—PHYSICS
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- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/20—Lamp housings
- G03B21/2006—Lamp housings characterised by the light source
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Abstract
The invention provides a filtering device, a wavelength conversion device, a light engine device and a projection system, and relates to the technical field of optics.
Description
Technical Field
The present invention relates to the field of optical technologies, and in particular, to a filter device, a wavelength conversion device, a light engine device, and a projection system.
Background
With the development of Digital chip technology, projection display is becoming more and more popular in public life and work, wherein DLP (Digital Light Processing) projection technology utilizes the technical principle of DMD (Digital micro mirror Device) chip time division and color separation to realize color display, and in DLP technology, a color wheel is an important time division and color separation element.
The color wheel comprises filtering diaphragms with different transmission spectrums, and the light output by filtering through the filtering diaphragms determines the color quality displayed by the DLP projector to a great extent. With the development of displays such as liquid crystal displays, the market has made higher requirements for color reduction capability for various display technologies. In order to achieve the miniaturization of the projector, the color wheel is generally located at the light-gathering position in the light path, that is, the filtering diaphragm of the color wheel is located at or near the focus of the gathered light in the light path. Both laser light source projectors and traditional bulb light source projectors adopt a light source and a color wheel to realize high-color display.
However, when light emitted from the light source is incident on the color wheel in the form of a light cone, the larger the angle of the light cone is, the poorer the color accuracy (i.e. color reduction precision) of the obtained light is, and the existing color wheel has been unable to meet the increasingly high color display requirements of users.
Disclosure of Invention
The invention aims to provide a filtering device, a wavelength conversion device, a light engine device and a projection system, which are used for improving the color accuracy of output light and realizing high-color light emission, thereby relieving the high-color display requirements of users.
The embodiment of the invention provides a filtering device which comprises a curved surface filtering element, wherein the curvature center of the curved surface filtering element is positioned on the light emergent side of the curved surface filtering element.
Further, the center of curvature of the curved filter element is located on the optical axis of the incident light to be filtered.
Further, the center of curvature of the curved filter element is disposed near the convergence point of the incident light.
Further, the center of curvature of the curved filter element coincides with a convergence point of the incident light.
Furthermore, the filter device also comprises a connecting piece and a first driving part, and the curved surface filter element is connected with the first driving part through the connecting piece; the first driving part is used for driving the curved surface filter element to rotate.
Further, the connecting piece is disc-shaped or circular; the curved surface filter elements are multiple, and each curved surface filter element is arranged along the circumference of the connecting piece.
Further, the filtering means is arranged to: when the first driving part drives each curved surface filter element to rotate, the circle center of a circle formed by the curvature centers of the curved surface filter elements is positioned on the rotating shaft of the first driving part.
Further, the radius angle of the circular arc formed by the radial cross section of the curved surface filter element is less than or equal to 180 °.
The embodiment of the invention also provides a wavelength conversion device, which comprises a curved surface filter element, a wavelength conversion layer and a reflecting substrate which are arranged along the propagation direction of exciting light, and also comprises a second driving part connected with the reflecting substrate; the curvature center of the curved surface filter element is positioned on one side of the curved surface filter element where the wavelength conversion layer is positioned; the second driving part is used for driving the curved surface filter element and the wavelength conversion layer to synchronously move.
Further, the center of curvature of the curved filter element is located on the optical axis of the excitation light.
Further, the center of curvature of the curved filter element and the center of the spot formed by the excitation light on the wavelength conversion layer form a straight line, and the straight line is parallel to or perpendicular to the rotating shaft of the second driving part.
Further, the reflective substrate is disc-shaped or annular; the curved surface filter elements are multiple and arranged along the circumference of the reflecting substrate.
Further, the wavelength conversion device is configured to: when the second driving part drives each curved surface filter element to rotate, the circle center of a circle formed by the curvature centers of the curved surface filter elements is positioned on the rotating shaft of the second driving part.
Further, the curvature center of the curved surface filter element is located on the optical axis of the excitation light and is arranged close to the wavelength conversion layer.
The embodiment of the invention also provides an optical engine device, which comprises the filter device or the wavelength conversion device.
The embodiment of the invention also provides a projection system which comprises the light engine device.
In the filtering device, the wavelength conversion device, the light engine device and the projection system provided by the embodiment of the invention, the filtering device comprises a curved surface filtering element, and the curvature center of the curved surface filtering element is positioned at the light-emitting side of the curved surface filtering element. The wavelength conversion device comprises a curved surface filter element, a wavelength conversion layer and a reflection substrate which are arranged along the propagation direction of the exciting light, and also comprises a second driving part connected with the reflection substrate; the curvature center of the curved surface filter element is positioned at one side of the wavelength conversion layer of the curved surface filter element; the second driving part is used for driving the curved surface filter element and the wavelength conversion layer to synchronously move. Above-mentioned filter equipment and wavelength conversion equipment all adopt curved surface filter element, compare with the plane filtering diaphragm that the colour wheel adopted among the prior art, and the reliance of light cone angle can be reduced to curved surface filter element when filtering, improves the chromaticity of output light, realizes high-colour light-emitting to alleviate user's high-colour display demand.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a transmission spectrum of a red light filtering diaphragm in a conventional color wheel for light with different incident angles;
fig. 2 is a schematic structural diagram of a filtering apparatus according to an embodiment of the present invention;
fig. 3 is a schematic diagram illustrating a light-emitting principle of a filter device according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a light engine apparatus according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a wavelength conversion device according to an embodiment of the present invention;
fig. 6 is a schematic diagram illustrating a light emitting principle of a wavelength conversion device according to an embodiment of the present invention;
FIG. 7 is a schematic diagram of another optical engine apparatus according to an embodiment of the present invention;
fig. 8 is a schematic structural diagram of another wavelength conversion device according to an embodiment of the present invention;
fig. 9 is a schematic diagram illustrating a light output principle of another wavelength conversion device according to an embodiment of the present invention;
fig. 10 is a schematic structural diagram of another optical engine apparatus according to an embodiment of the present invention.
Icon: 100-a filtering means; 101. 301, 501-curved surface filter element; 102-a connector; 103-a first drive member; 201-a light source; 202-a converging lens; 203. 407-a light pipe; 300. 500-a wavelength conversion device; 302. 502-wavelength conversion layer; 303-a reflective layer; 304-a substrate; 305. 504-a second drive member; 401-an excitation light source; 402-a collimating beam-shrinking lens; 403-light homogenizing elements; 404-dichroic mirror; 405-a first lens; 406-a second lens; 503-reflective substrate.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the prior art, a color wheel generally uses filter diaphragms with different transmission spectra to form a 360-degree circle, the filter diaphragms are planar, that is, the filter surface of the color wheel is a horizontal plane, the horizontal plane is vertical or nearly vertical to an optical axis, and a high-speed motor is adopted to drive the color wheel to rotate at a high speed; the filter membrane of the color wheel is located at or near the focal point of the converging light in the light path, so that the incident light is incident on the filter membrane of the color wheel, usually in the form of a light cone.
The inventor finds that the light emitted by the light source is incident on the existing color wheel in the form of a light cone, and has the following two problems: 1. the transmittance of small-angle light (i.e., light with a small incident angle) in the light cone is good, but the transmittance of large-angle light (i.e., light with a large incident angle) is poor, so that the loss of light energy is large; 2. the larger the angle of the light cone is, the worse the color accuracy of the light obtained after passing through the color wheel is, because the filtering diaphragm is designed for coating at a certain specific angle, the light with the incidence angle smaller than the set angle can shift to long wave when transmitting through the filtering diaphragm, and the light with the incidence angle larger than the set angle can shift to short wave when transmitting through the filtering diaphragm, so that the poorer color point can be obtained. As shown in fig. 1, the red filter diaphragm is designed for an angle of 15 °, the transmission spectrum at an incidence angle of 0 ° is shifted to a long wavelength, and the transmission spectrum at an incidence angle of 30 ° is shifted to a short wavelength. Based on this, the embodiment of the invention provides a filtering device, a wavelength conversion device, a light engine device and a projection system, which can reduce the dependence on the cone angle during filtering and obtain a better color point.
For the convenience of understanding the present embodiment, a detailed description will be given to a filtering apparatus disclosed in the present embodiment.
Referring to fig. 2, a schematic structural diagram of a filter apparatus according to an embodiment of the present invention is provided, where the filter apparatus includes a curved surface filter element 101, and a curvature center of the curved surface filter element 101 is located on a light-emitting side of the curved surface filter element 101.
The filter device may be located on a converging light path of the projection system, light to be filtered (i.e., incident light to be filtered) converges and irradiates a convex side (i.e., a light incident side) of the curved filter element 101, and exits from a concave side (i.e., a light exiting side) of the curved filter element 101, and a converging point of the light to be filtered is located on the concave side of the curved filter element 101. At this moment, to same incident light, the incident angle of marginal light in the incident light on curved surface filter element 101 is less than its incident angle on the planar filtering diaphragm of same position department, so, curved surface filter element 101 can reduce the reliance to the light cone angle of incident light during filtering to can reduce the energy loss of big angle light, and reduce the spectral migration degree, thereby improve the chromaticity of exporting light, realize high-color light-emitting, and then alleviate user's high-color display demand.
Alternatively, the center of curvature of the above-described curved filter element 101 is located on the optical axis of the incident light to be filtered.
Further, the center of curvature of the curved filter element 101 is located close to the convergence point of the incident light.
Preferably, the center of curvature of the curved filter element 101 coincides with the convergence point of the incident light. Thus, the incident angle of all the light rays in the incident light on the curved filter element 101 is close to 0 °, and the chromaticity of the output light is further improved.
For the sake of understanding, the light extraction principle of the filter device will be described below by taking the case where the curvature center of the curved filter element 101 coincides with the convergence point of the incident light. Referring to the light-emitting principle schematic diagram of the filtering apparatus shown in fig. 3, incident light to be filtered is incident on the curved surface filtering element 101 through the converging lens 202 in the form of a light cone, a focal point of the converging lens 202 coincides with a curvature center of the curved surface filtering element 101 (the point is O in fig. 3), and an incident angle of any light ray in the incident light on the curved surface filtering element 101 can be regarded as 0 °; for the marginal ray of the incident light, if a planar filter film is used, its incident angle is a, which is obviously larger than the incident angle (0 °) of the marginal ray on the curved filter element 101. This illustrates that the curved filter element 101 is able to reduce the dependence on the cone angle of the incident light when filtering compared to a planar filter diaphragm.
Alternatively, the radius angle of the circular arc formed by the radial cross section of the curved surface filter element 101 is less than or equal to 180 °. The curved surface structure of the radial cross section of the curved surface filter element 101 is a structure less than or equal to a semicircle, that is, as shown in fig. 3, the angle D is less than or equal to 180 °. This can reduce the manufacturing cost of the curved filter element 101.
Optionally, as shown in fig. 2, the filter device further includes a connecting member 102 and a first driving member 103, and the curved filter element 101 is connected to the first driving member 103 through the connecting member 102; the first driving part 103 is used for driving the curved surface filter element 101 to rotate.
Alternatively, the first driving member 103 may be a motor or a motor. The first drive member 103 may be located on a side of the connection member 102 remote from the curved filter element 101.
Alternatively, as shown in fig. 2, the connector 102 may have a disc shape or a circular ring shape; the curved surface filter element 101 is plural, and each curved surface filter element 101 is arranged along the circumference of the connection member 102. Each curved filtering element 101 may be a filtering diaphragm of a different transmission spectrum, for example, the curved filtering element 101 may include filtering diaphragms corresponding to red, green, yellow, blue, etc. It should be noted that the types of the curved surface filter elements 101 and the arrangement manner on the connecting member 102 may be set according to actual requirements, which is not limited in the embodiment of the present invention.
Optionally, the filtering device is configured to: when the first driving part 103 drives each curved surface filter element 101 to rotate, the center of a circle formed by the curvature centers of the curved surface filter elements 101 is located on the rotation axis of the first driving part 103.
Based on the filtering apparatus shown in fig. 2, an embodiment of the present invention further provides a light engine apparatus. Referring to fig. 4, a schematic structural diagram of a light engine device including the filter device 100 is shown.
In one possible implementation, as shown in fig. 4, the light engine apparatus includes a light source 201, a converging lens 202, a filter apparatus 100, and a light guide 203, which are sequentially arranged along a light propagation direction, wherein light emitted from the light source 201 passes through the converging lens 202 to become converging light, the converging light is irradiated on the filter apparatus 100, a focal point of the converging light (i.e., a focal point of the converging lens 202) is located in the light guide 203 or at a light entrance of the light guide 203, and the focal point of the converging light preferably coincides with a curvature center of a curved filter element in the filter apparatus 100. The light guide 203 may be referred to as an integrating light rod or a light guide rod.
The optical engine device provided in this embodiment has the same implementation principle and technical effects as those of the foregoing embodiment of the filter device, and for the sake of brief description, reference may be made to the corresponding contents in the foregoing embodiment of the filter device for the part of the embodiment of the optical engine device that is not mentioned.
The embodiment of the invention also provides a wavelength conversion device, which comprises a curved filter element, a wavelength conversion layer and a reflecting substrate which are arranged along the propagation direction of exciting light, and also comprises a second driving part connected with the reflecting substrate; the curvature center of the curved surface filter element is positioned at one side of the wavelength conversion layer of the curved surface filter element; the second driving part is used for driving the curved surface filter element and the wavelength conversion layer to synchronously move.
The curved filter element can transmit the exciting light and filter stimulated light generated by the wavelength conversion layer based on the exciting light. The exciting light generally transmits through the curved filter element and is converged and irradiated to the wavelength conversion layer; the excited light generated by the wavelength conversion layer is reflected by the reflection substrate, enters the curved surface filter element in the form of a light cone, and is output after being filtered by the curved surface filter element. Because the curvature center of curved surface filter element is located curved surface filter element's wavelength conversion layer place one side, consequently to same stimulated luminescence, the incident angle of marginal light in the stimulated luminescence on curved surface filter element is less than its incident angle on the planar filtering diaphragm of same position department, so, the dependence to the light cone angle of stimulated luminescence during curved surface filter element can reduce the filtering, thereby can reduce the energy loss of big angle light, and reduce the spectrum skew degree, thereby improve the chromaticity of output light, realize high color light, and then alleviate user's high-color display demand.
Alternatively, the second driving member may be a motor or a motor. The second drive component may be located on a side of the reflective substrate remote from the wavelength converting layer.
Optionally, the center of curvature of the curved filter element is located on the optical axis of the excitation light. The center of curvature of the curved filter element is thus also located on the optical axis of the stimulated luminescence generated by the wavelength conversion layer.
Further, the wavelength conversion layer may be planar or curved; the curvature center of the curved filter element and the center of the light spot formed by the exciting light on the wavelength conversion layer form a straight line, and the straight line is parallel to or perpendicular to the rotating shaft of the second driving part.
In some possible embodiments, referring to a schematic structural diagram of a wavelength conversion device shown in fig. 5, the wavelength conversion device includes a curved filter element 301, a wavelength conversion layer 302 and a reflective substrate arranged along a propagation direction of excitation light, and further includes a second driving part 305 connected to the reflective substrate; the center of curvature of the curved filter element 301 is located on the side of the curved filter element 301 where the wavelength conversion layer 302 is located; the second driving part 305 is used for driving the curved surface filter element 301 and the wavelength conversion layer 302 to move synchronously. The wavelength conversion layer 302 is planar, and the reflective substrate is disk-shaped or annular; the curved surface filter element 301 is plural, and each curved surface filter element 301 is arranged along the circumference of the reflective substrate.
The center of curvature of the curved filter element 301 and the center of the spot of the excitation light formed on the wavelength conversion layer 302 form a straight line, which may be parallel to the rotation axis of the second driving member 305.
As shown in fig. 5, the reflective substrate may include a reflective layer 303 and a substrate 304, the reflective layer 303 being positioned between the wavelength conversion layer 302 and the substrate 304.
Optionally, the wavelength conversion device is configured to: when the second driving part 305 rotates each curved surface filter element 301, the center of a circle formed by the curvature centers of each curved surface filter element 301 is located on the rotation axis of the second driving part 305.
Further, the center of curvature of the curved filter element 301 is located on the optical axis of the excitation light and is disposed close to the wavelength conversion layer 302. At this time, the curvature center of the curved filter element 301 is also located on the optical axis of the stimulated luminescence generated by the wavelength conversion layer 302 based on the stimulated luminescence, so that the incident angle of all light rays in the stimulated luminescence on the curved filter element 301 can be as close to 0 ° as possible, and the chromaticity of the output light is further improved.
For the sake of understanding, the light extraction principle of the wavelength conversion device will be described below by taking an example in which the center of curvature of the curved filter element 301 is located on the optical axis of the excitation light and is disposed close to the wavelength conversion layer 302. Referring to the schematic diagram of the light output principle of a wavelength conversion device shown in fig. 6, stimulated light generated by the wavelength conversion layer 302 is incident on the curved surface filter element 301 in the form of a light cone, and the curvature center O of the curved surface filter element 101 is located on the optical axis of the stimulated light; for the marginal ray in the stimulated light, if a planar filter film is used, its incident angle is b2, and obviously, the incident angle b2 is greater than the incident angle b1 of the marginal ray on the curved filter element 301. This illustrates that curved filter element 301 can reduce the dependence on the cone angle of the stimulated light during filtering compared to a planar filter diaphragm.
Alternatively, the radius angle of the circular arc formed by the radial cross section of the curved surface filter element 301 is less than or equal to 180 °. The curved surface structure of the radial cross section of the curved surface filter element 301 is a structure less than or equal to a semicircle, that is, as shown in fig. 6, the angle D is less than or equal to 180 °. This can reduce the manufacturing cost of the curved filter element 301.
Based on the wavelength conversion device shown in fig. 5, another light engine device is provided in the embodiments of the present invention. Referring to fig. 7, another light engine device is shown, which includes the wavelength conversion device 300.
In one possible implementation, as shown in fig. 7, the light engine device includes an excitation light source 401, a collimating and beam-shrinking lens 402, a light homogenizing element 403, a dichroic mirror 404, a first lens 405, and a wavelength conversion device 300, which are sequentially arranged along a propagation direction of the excitation light, and further includes a second lens 406 and a light guide 407; the excitation light source 401 is configured to emit excitation light; the collimating and beam-reducing lens 402 is used for collimating and reducing the exciting light; the dodging element 403 is used for dodging the excitation light after the collimation and the shrinkage; the dichroic mirror 404 is used for transmitting the excitation light and reflecting the excited light; the first lens 405 is used to focus the excitation light to the wavelength conversion device 300; the second lens 406 is used for converging the stimulated light into the light guide 407 or the light inlet of the light guide 407. The focal point of the first lens 405 is preferably coincident with the center of curvature of the curved filter element in the wavelength conversion device 300 to maximize the chromaticity of the output light.
It should be noted that although dichroic mirror 404 is used for transmitting excitation light and reflecting stimulated excitation light in fig. 7, the scope of the present invention is not limited thereto, and in other embodiments, dichroic mirror 404 may also be used for reflecting excitation light and transmitting stimulated excitation light.
The optical engine device provided in this embodiment has the same implementation principle and technical effects as those of the wavelength conversion device embodiment, and for the sake of brief description, reference may be made to the corresponding contents in the wavelength conversion device embodiment for the part of the embodiment of the optical engine device that is not mentioned.
In other possible embodiments, referring to a schematic structural diagram of another wavelength conversion device shown in fig. 8, the wavelength conversion device includes a curved filter element 501, a wavelength conversion layer 502, and a reflective substrate 503 arranged along a propagation direction of excitation light, and further includes a second driving part 504 connected to the reflective substrate 503, wherein the reflective substrate 503 has a cylindrical shape, and both the curved filter element 501 and the wavelength conversion layer 502 have cylindrical surfaces.
The center of curvature of the curved filter element 501 and the center of the spot of the excitation light formed on the wavelength conversion layer 502 form a straight line, which may be perpendicular to the rotation axis of the second driving member 504.
For the sake of understanding, the light emitting principle of the wavelength conversion device will be described below by taking the convergence point of the excitation light and the center of the curved filter element 501 as an example. Referring to the light-emitting principle schematic diagram of another wavelength conversion device shown in fig. 9, the center of the curved surface filter element 501 (the center of curvature), the center of the wavelength conversion layer 502, and the convergence point of the excitation light are all points O; stimulated luminescence generated by the wavelength conversion layer 502 is incident on the curved surface filter element 501 in the form of a light cone, the point O is located on a straight line where any light ray in the stimulated luminescence is located, and the incident angle of any light ray in the stimulated luminescence on the curved surface filter element 501 can be regarded as 0 degree; for the marginal ray in the stimulated light, if a planar filter film is used, its incident angle is c, which is obviously larger than the incident angle (0 °) of the marginal ray on the curved filter element 501. This illustrates that curved filter element 501 can reduce the dependence on the cone angle of the stimulated light during filtering compared to a planar filter diaphragm.
Based on the wavelength conversion device shown in fig. 8, another light engine device is provided in the embodiments of the present invention. Referring to fig. 10, another light engine device is shown, which includes the wavelength conversion device 500.
In one possible implementation, as shown in fig. 10, the light engine device includes an excitation light source 401, a collimating and beam-shrinking lens 402, a light homogenizing element 403, a dichroic mirror 404, a first lens 405, and a wavelength conversion device 500, which are sequentially arranged along the propagation direction of the excitation light, and further includes a second lens 406 and a light guide 407. Parts not described in detail in fig. 10 can be referred to corresponding description in fig. 7, and are not described again here.
The optical engine device provided in this embodiment has the same implementation principle and technical effects as those of the wavelength conversion device embodiment, and for the sake of brief description, reference may be made to the corresponding contents in the wavelength conversion device embodiment for the part of the embodiment of the optical engine device that is not mentioned.
The embodiment of the invention also provides a projection system, which comprises the light engine device.
The projection system provided in this embodiment has the same implementation principle and technical effects as those of the foregoing embodiment of the light engine apparatus, and for the sake of brief description, reference may be made to the corresponding contents in the foregoing embodiment of the light engine apparatus for the embodiment of the projection system without some references.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In addition, in the description of the embodiments of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (16)
1. The filtering device is characterized by comprising a curved surface filtering element, wherein the curvature center of the curved surface filtering element is positioned on the light emergent side of the curved surface filtering element.
2. The filtering device according to claim 1, wherein the center of curvature of the curved filtering element is located on an optical axis of incident light to be filtered.
3. The filtering device according to claim 2, wherein a center of curvature of the curved filtering element is located near a convergence point of the incident light.
4. The filtering device according to claim 3, wherein a center of curvature of the curved filtering element coincides with a convergence point of the incident light.
5. The filter device according to claim 1, further comprising a connector and a first drive member, wherein the curved filter element is connected to the first drive member through the connector; the first driving part is used for driving the curved surface filter element to rotate.
6. The filtering device according to claim 5, wherein the connecting member is in a shape of a disk or a ring; the curved surface filter elements are multiple, and each curved surface filter element is arranged along the circumference of the connecting piece.
7. The filtering device according to claim 6, characterized in that the filtering device is arranged to: when the first driving part drives each curved surface filter element to rotate, the circle center of a circle formed by the curvature centers of the curved surface filter elements is positioned on the rotating shaft of the first driving part.
8. The filtering device according to any one of claims 1 to 7, wherein a radial cross section of the curved filtering element forms an arc having a central angle of less than or equal to 180 °.
9. A wavelength conversion device is characterized by comprising a curved filter element, a wavelength conversion layer and a reflecting substrate which are arranged along the propagation direction of exciting light, and a second driving part connected with the reflecting substrate; the curvature center of the curved surface filter element is positioned on one side of the curved surface filter element where the wavelength conversion layer is positioned; the second driving part is used for driving the curved surface filter element and the wavelength conversion layer to synchronously move.
10. The wavelength conversion device according to claim 9, wherein a center of curvature of the curved filter element is located on an optical axis of the excitation light.
11. The wavelength conversion device according to claim 10, wherein the center of curvature of the curved filter element and the center of the spot of the excitation light formed on the wavelength conversion layer form a straight line, and the straight line is parallel or perpendicular to the rotation axis of the second driving member.
12. The wavelength conversion device according to claim 9, wherein the reflective substrate has a disc shape or a circular ring shape; the curved surface filter elements are multiple and arranged along the circumference of the reflecting substrate.
13. The wavelength conversion device according to claim 12, wherein the wavelength conversion device is arranged to: when the second driving part drives each curved surface filter element to rotate, the circle center of a circle formed by the curvature centers of the curved surface filter elements is positioned on the rotating shaft of the second driving part.
14. The wavelength conversion device according to claim 13, wherein a center of curvature of the curved filter element is located on an optical axis of the excitation light and is disposed close to the wavelength conversion layer.
15. A light engine device comprising a filter device according to any one of claims 1 to 8 or a wavelength conversion device according to any one of claims 9 to 14.
16. A projection system comprising the light engine assembly of claim 15.
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| CN202010241013.3A CN111308693B (en) | 2020-03-30 | 2020-03-30 | Filter device, wavelength conversion device, light engine device and projection system |
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| CN111308693B CN111308693B (en) | 2021-05-04 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111679424A (en) * | 2020-06-29 | 2020-09-18 | 无锡视美乐激光显示科技有限公司 | Wavelength conversion device and light source equipment |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102073115A (en) * | 2010-11-19 | 2011-05-25 | 苏州佳世达光电有限公司 | Fluorescent powder color wheel and projector applying same |
| CN202870328U (en) * | 2012-11-15 | 2013-04-10 | 京东方科技集团股份有限公司 | Color filter and color display device |
| CN106199947A (en) * | 2014-09-11 | 2016-12-07 | 中强光电股份有限公司 | Color wheel and projection device |
| CN110764347A (en) * | 2018-07-26 | 2020-02-07 | 无锡视美乐激光显示科技有限公司 | Wavelength conversion device, laser light source device thereof and laser projector |
-
2020
- 2020-03-30 CN CN202010241013.3A patent/CN111308693B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102073115A (en) * | 2010-11-19 | 2011-05-25 | 苏州佳世达光电有限公司 | Fluorescent powder color wheel and projector applying same |
| CN202870328U (en) * | 2012-11-15 | 2013-04-10 | 京东方科技集团股份有限公司 | Color filter and color display device |
| CN106199947A (en) * | 2014-09-11 | 2016-12-07 | 中强光电股份有限公司 | Color wheel and projection device |
| CN110764347A (en) * | 2018-07-26 | 2020-02-07 | 无锡视美乐激光显示科技有限公司 | Wavelength conversion device, laser light source device thereof and laser projector |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111679424A (en) * | 2020-06-29 | 2020-09-18 | 无锡视美乐激光显示科技有限公司 | Wavelength conversion device and light source equipment |
| CN111679424B (en) * | 2020-06-29 | 2021-07-13 | 无锡视美乐激光显示科技有限公司 | Wavelength conversion device and light source equipment |
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|---|---|
| CN111308693B (en) | 2021-05-04 |
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Effective date of registration: 20240617 Address after: No. 24-1, Science and Education Software Park, No. 100 Jinxi Road, Binhu District, Wuxi City, Jiangsu Province, 214000 Patentee after: Wuxi Jiqing Optoelectronic Technology Co.,Ltd. Country or region after: China Address before: Room 101, building 3, Yixing Photoelectric Industrial Park, 10 Xingli Road, Yixing Economic Development Zone, Wuxi City, Jiangsu Province, 214200 Patentee before: WUXI SEEMILE LASER DISPLAY TECHNOLOGY Co.,Ltd. Country or region before: China |