CN119105230A

CN119105230A - Projection device and lamp

Info

Publication number: CN119105230A
Application number: CN202411595865.7A
Authority: CN
Inventors: 梁修慧; 吴文龙
Original assignee: Shenzhen Zhiyan Technology Co Ltd; Shenzhen Qianyan Technology Co Ltd
Current assignee: Shenzhen Zhiyan Technology Co Ltd; Shenzhen Qianyan Technology Co Ltd
Priority date: 2024-11-11
Filing date: 2024-11-11
Publication date: 2024-12-10
Anticipated expiration: 2044-11-11
Also published as: CN119105230B

Abstract

The embodiment of the present application provides a projection device and a lamp. The projection device includes a light source assembly, a rotating member, and at least two reflective surfaces; the light source assembly is used to generate an outgoing light; the rotating member has a first axis; at least two reflective surfaces are both provided on the rotating member, at least two reflective surfaces are arranged around the first axis, at least one of the at least two reflective surfaces is inclined relative to the first axis, and at least two reflective surfaces respectively form different angles with the first axis; wherein the rotating member can drive each reflective surface to rotate around the first axis, so that each reflective surface rotates sequentially to the optical path of the outgoing light. The above scheme can improve the situation where the meteor movement path of the projection device is relatively single, thereby enhancing the user experience of the projection device.

Description

Projection device and lamp

Technical Field

The present application relates to the field of projection technologies, and in particular, to a projection apparatus and a lamp.

Background

A projection device is an apparatus that projects a pattern onto a target surface in an enlarged scale. In the related art, the projection device introduces dynamic elements to make the pattern vivid and interesting, so as to enhance the experience. For example, the projection device may simulate the effect of a star point swipe.

Specifically, the functional component for implementing the movement of the projected star point generally has two slits, which are spaced along the outgoing light path of the light source component, and one of which is rotatable about the first axis. When one of the slits rotates to continuously intersect with the slit at the fixed position, the emergent light generated by the light source component sequentially passes through the two slits and forms a moving slender star point along with the rotation of one of the slits. However, the moving path of the star point generated by the scheme is relatively single, so that the experience of the projection device is poor.

Disclosure of Invention

In view of the above, the embodiment of the application provides a projection device and a lamp, which aim to improve the situation that the meteor moving path of the projection device is relatively single, thereby improving the experience of the projection device.

According to a first aspect of the present application, an embodiment of the present application provides a projection apparatus, which includes a light source assembly, a rotating member, and at least two reflective surfaces. The light source component is used for generating emergent light. The rotating member has a first axis. The at least two reflecting surfaces are arranged on the rotating piece and are arranged around the first axis, at least one of the at least two reflecting surfaces is inclined relative to the first axis, and the at least two reflecting surfaces are respectively different from the first axis in angle. The rotating piece can drive each reflecting surface to rotate around the first axis, so that each reflecting surface can sequentially rotate to the light path of emergent light.

In some embodiments, each of the reflective surfaces is inclined with respect to the first axis, and each of the reflective surfaces is at a different angle with respect to the first axis.

In some embodiments, the projection device includes a reflecting device disposed between the light source assembly and the rotating member, the reflecting device being configured to reflect the outgoing light to at least one of the at least two reflecting surfaces.

In some embodiments, the projection device includes a beam expander, where the beam expander is disposed on the light path of the reflected light beam of the at least two reflecting surfaces, and the beam expander is configured to perform unidirectional beam expansion on the outgoing light beam reflected by the reflecting surfaces, and propagate the outgoing light beam after unidirectional beam expansion.

In some embodiments, the projection device includes a beam expander, the beam expander is disposed between the light source assembly and the rotating member, and the beam expander is configured to unidirectionally expand the outgoing light generated by the light source assembly, and to transmit the unidirectionally expanded outgoing light to at least one of the at least two reflecting surfaces.

Wherein in some embodiments, the reflecting device is a planar mirror or a one-way cambered mirror.

Wherein, in some embodiments, each reflecting surface is a unidirectional cambered reflecting surface.

Wherein, in some embodiments, the beam expander comprises one of a cylindrical lens, a cylindrical microlens array, a unidirectional cambered surface reflector and a cylindrical lens grating.

The beam expander comprises a rotary table and at least two optical elements, wherein the at least two optical elements are arranged on the rotary table, the rotary table is provided with a second axis, each optical element is arranged around the second axis, the rotary table can drive each optical element to rotate around the second axis so that each optical element can sequentially rotate to a light path of emergent light reflected by the reflecting device, the optical device is used for carrying out unidirectional beam expansion on the emergent light transmitted by the optical device and transmitting the emergent light subjected to unidirectional beam expansion to at least one reflecting surface of at least two reflecting surfaces, optical parameters of each optical element are different, and the unidirectional beam expansion lengths of the emergent light transmitted by the optical element are different.

Wherein in some embodiments the optical element is a lenticular lens or a lenticular lens.

In some embodiments, the light source assembly comprises at least three light emitting devices and at least two beam combining elements, wherein the wavelengths of light emitted by the light emitting devices are different, the light emitting devices form emergent light rays with composite colors of the light source assembly after being combined by the at least two beam combining elements, the at least three light emitting devices comprise a first light emitting device and at least two light emitting devices, the emergent direction of the first light emitting device is the emergent direction of the emergent light rays, the emergent direction of the at least two second light emitting devices is perpendicular to the emergent direction of the first light emitting device, and the at least two beam combining elements are respectively arranged at the perpendicular intersections of the two different colors of light.

In some embodiments, the projection device comprises reflection elements with the same number as the reflection surfaces, each reflection element is fixedly arranged on the outer peripheral surface of the rotating piece, and the reflection elements are sequentially arranged around the first axis, wherein the surface of the reflection element, which faces away from the rotating piece, is the reflection surface.

Wherein in some embodiments, a reflective surface is a portion of the outer circumferential surface of the rotating member.

According to a second aspect of the present application, an embodiment of the present application provides a lamp, which includes a circuit board and the projection device of any one of the above mentioned, and the projection device is electrically connected to the circuit board.

Compared with the prior art, in the projection device, each reflecting surface and the rotating piece rotate around the first axis, when the reflecting surface irradiated by the emergent light rotates along with the rotating piece, the emergent angle of the emergent light formed by reflection of the reflecting surface changes, the imaging position of the star point formed on the target surface also changes, and the effect of star point movement on the target surface is realized. Further, since at least one reflecting surface is inclined relative to the first axis and the angles formed by at least two reflecting surfaces and the first axis are different, when the rotating member drives each reflecting surface to rotate to the light path of the emergent light in sequence, the moving path of the emergent light reflected by at least one reflecting surface on the target surface is different from the moving paths of other reflecting surfaces on the target surface, so that the effect that each star point moves at different positions on the target surface is created, the situation that the star point moving path of the projection device is relatively single is improved, the experience of the projection device is improved, and the viewing experience of users is enriched.

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. Like elements or portions are generally identified by like reference numerals throughout the several figures. In the drawings, elements or portions thereof are not necessarily drawn to scale.

Fig. 1 is a schematic structural diagram of a projection apparatus according to a first embodiment of the present application;

FIG. 2 is a diagram showing a path of an outgoing light beam reflected by the first reflecting surface of the projection device shown in FIG. 1;

FIG. 3 is a diagram showing a path of an outgoing light beam reflected by the second reflecting surface of the projection device shown in FIG. 1;

FIG. 4 is a schematic diagram of another structure of a projection apparatus according to a first embodiment of the present application;

FIG. 5 is a schematic diagram illustrating a structure in which each reflecting surface of the projection apparatus shown in FIG. 1 is disposed on a rotating member;

FIG. 6 is a schematic diagram illustrating another structure in which each reflecting surface of the projection apparatus shown in FIG. 1 is disposed on a rotating member;

fig. 7 is a schematic diagram of a projection apparatus according to a first embodiment of the present application;

FIG. 8 is a diagram illustrating a propagation path of light rays exiting the projection device shown in FIG. 7;

FIG. 9 is a schematic diagram of a projection apparatus according to a first embodiment of the present application;

FIG. 10 is a schematic diagram of a projection apparatus according to a first embodiment of the present application;

FIG. 11 is a diagram showing the propagation path of the outgoing light of the projection device shown in FIG. 10;

FIG. 12 is a schematic diagram of a projection apparatus according to a second embodiment of the present application;

FIG. 13 is a schematic diagram of a projection apparatus according to a second embodiment of the present application;

FIG. 14 is a diagram showing the propagation path of the outgoing light of the projection device shown in FIG. 13;

FIG. 15 is a schematic diagram of a projection apparatus according to a second embodiment of the present application;

FIG. 16 is a graph of the propagation path of the light rays exiting the projection device shown in FIG. 15;

FIG. 17 is a schematic diagram showing a path of light emitted from a projection device according to a second embodiment of the present application;

FIG. 18 is a schematic diagram of a projection apparatus according to a second embodiment of the present application;

FIG. 19 is a diagram showing the propagation path of the outgoing light rays from the projection device shown in FIG. 18;

FIG. 20 is a schematic diagram of a projection apparatus according to a second embodiment of the present application;

reference numerals:

1. a light source assembly; 11, light emitting devices, 111, first light emitting devices, 112, second light emitting devices, 12, beam combining elements;

2. a rotating member; 201, a first mounting groove, 202, a second mounting groove;

3. 31, the first reflecting surface, 32, the second reflecting surface;

4. Beam expander 41, turntable 42 and optical device;

5. A reflecting device;

S, emergent rays, M, a first axis, N, a second axis, L ₁, a normal line of a first reflecting surface, L ₂, a normal line of a second reflecting surface, an included angle between alpha ₁ and the normal line of the first reflecting surface and the first axis, and an included angle between alpha ₂ and the normal line of the second reflecting surface and the first axis.

Detailed Description

The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

It is noted that when an element/component is referred to as being "fixed to" another element/component, it can be directly on the other element/component or intervening elements/components may also be present. When an element/component is referred to as being "connected" to another element/component, it can be directly connected to the other element/component or intervening elements/components may also be present, while when an element/component is referred to as being "connected" to the other element/component, it can be integrally connected or integrally connected with the other element/component. When an element/component is referred to as being "disposed on" another element/component, it can be directly on the other element/component or intervening elements/components may also be present.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.

Example 1

Referring to fig. 1 to 20, the projection apparatus includes a light source assembly 1, a rotating member 2, and at least two reflecting surfaces 3. The light source assembly 1 is used for generating emergent light S. The rotor 2 is adapted to rotate about a first axis M, which is the axis of rotation of the rotor 2. At least two reflecting surfaces 3 are provided on the rotary member 2, and each reflecting surface 3 is disposed in turn around the first axis M, at least one reflecting surface 3 of the at least two reflecting surfaces is inclined with respect to the first axis M, and at least two reflecting surfaces 3 are respectively at different angles from the first axis M. The rotating member 2 can drive at least two reflecting surfaces 3 to rotate around the first axis M, so that each reflecting surface 3 sequentially rotates to the light path of the outgoing light S.

In the projection device according to the present application, each of the reflecting surface 3 and the rotating member 2 rotates around the first axis M, and when the reflecting surface 3 irradiated by the outgoing light S rotates together with the rotating member 2, the outgoing angle of the outgoing light S formed changes, and the imaging position on the target surface also changes, so that the star point moving effect on the target surface is realized. Among them, as the target surface that can receive and display the star point projected by the projection device, there can be mentioned a reflective surface such as a floor, a wall, a ceiling, and the like. Further, since at least one of the reflecting surfaces 3 is inclined with respect to the first axis M, and the angles formed by at least two of the reflecting surfaces 3 and the first axis M are different, when the rotating member 2 drives each of the reflecting surfaces 3 to rotate sequentially onto the light path of the outgoing light S, the moving path of the outgoing light S reflected by at least one of the reflecting surfaces 3 on the target surface is different from the moving paths of other reflecting surfaces 3 on the target surface, so that the star point moving path of the projection device is improved in a relatively single situation, and the experience of the projection device is improved, and the viewing experience of users is enriched.

In some embodiments, the rotor 2 is adapted for driving connection with a power source capable of driving the rotor 2 in rotation about the first axis M. When the rotating member 2 is in transmission connection with the power source, the rotating speed of the rotating member 2 can be adaptively adjusted, so that the moving speed of each star point on the target surface is changed to match the use requirements of the projection device in different application scenes. It will be appreciated that the type of power source is various, and embodiments of the present application are not limited thereto, and examples of such power sources include motors, cylinders, and other similar functional structures.

Fig. 1 is a schematic structural diagram of a projection apparatus according to a first aspect of the present application, fig. 2 is a path diagram of an outgoing light beam after being reflected by a first reflecting surface of the projection apparatus shown in fig. 1, and fig. 3 is a path diagram of an outgoing light beam after being reflected by a second reflecting surface of the projection apparatus shown in fig. 1.

Referring to fig. 1 to 3, in some embodiments, at least two reflecting surfaces 3 include at least one first reflecting surface 31 and at least one second reflecting surface 32, the first reflecting surface 31 and/or the second reflecting surface 32 are inclined with respect to the first axis M, and the first reflecting surface 31 and the second reflecting surface 32 respectively form different angles with the first axis M.

It should be noted that reference herein to at least one of the first reflective surface 31 and the second reflective surface 32 being inclined with respect to the first axis M means in particular that both ends of the first reflective surface 31 in a direction parallel to the first axis M are not flush and/or that both ends of the second reflective surface 32 in a direction parallel to the first axis M are not flush. The angles formed by the first reflecting surface 31 and the second reflecting surface 32 and the first axis M are specifically indicated as an included angle α ₁ between a normal L ₁ of the first reflecting surface 31 and an auxiliary line and an included angle α ₂,α₂≠α₁ between a normal L ₂ of the second reflecting surface 32 and an auxiliary line shown in fig. 1, 5 or 6, respectively, wherein the auxiliary line formed on the first reflecting surface 31 and the auxiliary line formed on the second reflecting surface 32 are parallel to the first axis M.

It should be further noted that when the first reflecting surface 31 and the second reflecting surface 32 are planar, tilting at least one of the first reflecting surface 31 and the second reflecting surface 32 with respect to the first axis M means that at least one of the first reflecting surface 31 and the second reflecting surface 32 is not parallel to the first axis M, and that the angles of the first reflecting surface 31 and the second reflecting surface 32 with respect to the first axis M specifically mean an angle α ₁ between a normal L ₁ of the first reflecting surface 31 and the first axis M, and an angle α ₂,α₂≠α₁ between a normal L ₂ of the second reflecting surface 32 and the first axis M, respectively.

When the first reflecting surface 31 and the second reflecting surface 32 are cambered surfaces, at least one of the first reflecting surface 31 and the second reflecting surface 32 is inclined relative to the first axis M, which means that the center line of at least one of the first reflecting surface 31 and the second reflecting surface 32 is not parallel to the first axis M, and the angles formed by the first reflecting surface 31 and the second reflecting surface 32 and the first axis M respectively specifically mean the included angle between the center line of the first reflecting surface 31 and the first axis M and the included angle between the center line of the second reflecting surface 32 and the first axis M.

For ease of understanding, the motion trajectories of star points projected on the target surface after the outgoing light rays are reflected by a first reflecting surface 31 and a second reflecting surface 32, respectively, are illustrated.

The rotating member 2 can drive the first reflecting surface 31 and the second reflecting surface 32 to rotate around the first axis M, so that the first reflecting surface 31 and the second reflecting surface 32 sequentially rotate onto the light path of the outgoing light S. When the rotating member 2 drives the first reflecting surface 31 to rotate onto the light path of the outgoing light S, the outgoing light S reflected by the first reflecting surface 31 moves in the first moving path. When the rotating member 2 drives the second reflecting surface 32 to rotate onto the light path of the outgoing light S, the outgoing light S reflected by the second reflecting surface 32 moves in the second moving path, and the second moving path and the first moving path are at least partially not overlapped.

It should be noted that, the movement of the outgoing light S reflected by the first reflecting surface 31 in the first movement path mentioned here specifically means that the outgoing light S reflected by the first reflecting surface 31 forms a star point on the target surface, and when the first reflecting surface 31 irradiated with the outgoing light S rotates together with the rotating member 2, the outgoing angle of the outgoing light S formed by the reflection by the first reflecting surface 31 changes, and the imaging position of the star point formed on the target surface also changes, and the changing path of the star point is referred to as the first movement path.

Similarly, the movement of the outgoing light S reflected by the second reflecting surface 32 in the second moving path specifically means that the outgoing light S reflected by the second reflecting surface 32 forms a star point on the target surface, and when the second reflecting surface 32 irradiated by the outgoing light S rotates together with the rotating member 2, the outgoing angle of the outgoing light S formed by the reflection of the second reflecting surface 32 changes, and the imaging position of the star point formed on the target surface also changes, and the changing path of the star point is called as the second moving path.

In some embodiments, each of the reflecting surfaces 3 is inclined with respect to the first axis M, and each of the reflecting surfaces 3 is at a different angle with respect to the first axis M, and illustratively, at least two of the reflecting surfaces 3 may include a third reflecting surface, a fourth reflecting surface, an..the nth reflecting surface, in addition to the first reflecting surface 31 and the second reflecting surface 32, and when at least two of the reflecting surfaces 3 include the first reflecting surface 31, the second reflecting surface 32, the..the nth reflecting surface, the first to nth reflecting surfaces are at different angles with respect to the first axis M, and optionally, N is a natural number of 4 or more and 8 or less.

In this way, when the rotating member 2 drives each reflecting surface 3 to rotate to the light path of the emergent light S in turn, the emergent angle of the emergent light S formed by the reflection of each reflecting surface 3 and the imaging position of the star point formed on the target surface by the reflection of the reflecting surface 3 are different, so that the effect that each star point moves at different positions on the target surface is achieved, and the experience of the projection device is further improved.

Alternatively, in other embodiments, each first reflecting surface 31 is inclined with respect to the first axis M, each first reflecting surface 31 forms an angle with the first axis M, and each second reflecting surface 32 is inclined with respect to the first axis M, each second reflecting surface 32 forms an angle with the first axis M. Wherein, the angle formed by any first reflecting surface 31 and the first axis M is different from the angle formed by any second reflecting surface 32 and the first axis M.

It will be appreciated that the arrangement of the at least two reflecting surfaces 3 on the rotatable member 2 is indeed various and is not particularly limited in other embodiments of the application.

For example, at least one first reflecting surface 31 and at least one second reflecting surface 32 are arranged in sequence around the first axis M. In this way, when the rotating member 2 drives the at least one first reflecting surface 31 and the at least one second reflecting surface 32 to rotate sequentially to the light path of the outgoing light S, the outgoing angle of the outgoing light S formed by reflection of each first reflecting surface 31 and the imaging position of the star point formed on the target surface by reflection of each first reflecting surface 31 are substantially the same, the outgoing angle of the outgoing light S formed by reflection of each second reflecting surface 32 and the imaging position of the star point formed on the target surface by reflection of each first reflecting surface 31 are substantially the same, so that the effect that a part of the star point repeatedly moves on one moving path of the target surface first and then another part of the star point repeatedly moves on another moving path of the target surface is achieved, and the experience of the projection device is further improved.

For another example, at least one first reflecting surface 31 and at least one second reflecting surface 32 are alternately arranged around the first axis M. In this way, when the rotating member 2 drives the at least one first reflecting surface 31 and the at least one second reflecting surface 32 to rotate sequentially to the light path of the emergent light S, the effect that each star point alternately repeatedly moves on different moving paths of the target surface is achieved, so that the experience of the projection device is further improved.

For example, the at least one first reflecting surface 31 and the at least one second reflecting surface 32 may be sequentially arranged around the first axis M to form a reflecting surface group, and then a plurality of reflecting surface groups are alternately arranged around the first axis M, so as to further enhance the experience of the projection device.

In some embodiments, the number of reflective surfaces 3 is greater than or equal to 4 and less than or equal to 8. This is because the inventor finds that the number of reflecting surfaces 3 should not exceed 8 through a lot of experiments, and that exceeding 8 can cause the scanning path of the outgoing light S on a single reflecting surface 3 to be too short, resulting in a short scanning path of star points on the target surface, and poor star point movement effect.

For the above-mentioned light source assembly 1, as shown in fig. 4, in order to create an immersive lighting atmosphere, the experience of the projection apparatus is further improved, in some embodiments, the light source assembly 1 includes at least three light emitting devices 11 and at least two beam combining elements 12, where the wavelengths of the lights emitted by the light emitting devices 11 are different, and the light emitting devices 11 are combined by the at least two beam combining elements 12 to form an outgoing light beam of the light source assembly 1 in a composite color.

Specifically, the at least three light emitting devices 11 include a first light emitting device 111 and at least two second light emitting devices 112, where the first light emitting device 111 and the at least two reflecting surfaces 3 are arranged at intervals, the emitting direction of the first light emitting device 111 is the emitting direction of the emitting light S generated by the light source assembly 1, the emitting directions of the at least two second light emitting devices 112 are perpendicular to the emitting directions of the first light emitting device 111, the at least two beam combining elements 12 are respectively arranged at the perpendicular intersections of the light with different colors, each beam combining element 12 can transmit the light emitted by the first light emitting device 111, and the light emitted by each second light emitting device 112 is reflected to at least one reflecting surface 3 of the at least two reflecting surfaces 3 along the direction parallel to the emitting directions of the first light emitting device 111.

In some embodiments, the beam combining element 12 has a characteristic of reflecting or transmitting the light beam with the wavelength of the outgoing light beam S, and performing no processing on the light beam with the wavelength other than the wavelength of the outgoing light beam S, so as to reduce the participation of the ambient light in the environment in the beam combining, and affect the color of the outgoing light beam S after the beam combining. Examples of the beam combining element 12 having a beam combining function include a dichroic mirror, a prism, and a light coupler. Illustratively, the beam combining element 12 may be a dichroic mirror, which may perform a beam combining function in a relatively small space due to its smaller volume and complexity, which may reduce the structural complexity of the projection device, and may facilitate reducing the overall volume of the projection device.

In some embodiments, at least three light emitting devices 11 may emit light according to an instruction carrying at least one of the emission time of some or all of the at least three light emitting devices 11, the emission intensity of some or all of the at least three light emitting devices 11, the emission frequency of some or all of the at least three light emitting devices 11. Such a light emitting device 11 may be an LED lamp or a laser emitter. The at least three light emitting devices 11 are laser emitters, and compared with the LED beads, the laser emitters are more suitable for the application scene of the projection device due to the fine display effect of the laser emitters under the premise of ensuring the basic requirements of service life, brightness and the like.

For ease of description, three light emitting devices 11 are illustrated as red, blue, and green laser emitters, respectively, and the number of dichroic mirrors required is two because any two of the red, blue, and green laser emitters need to be combined with one another. As shown in fig. 4, two dichroic mirrors are respectively disposed at the vertical intersections of the light emitted by one monochromatic laser emitter and the light emitted by the other two monochromatic laser emitters, so that the light with different wavelengths generated by the three dichroic mirrors are combined and then form the emergent light S with the composite color of the light source assembly 1 after the beam combination treatment.

The light emission time of at least two of the red laser emitter, the blue laser emitter and the green laser emitter can be controlled so that the light source assembly 1 can generate emergent rays with different effects.

For example, if mixed light is required in a certain period of time, the mixed light is formed by combining the light emitted by any two of the red laser emitter, the blue laser emitter and the green laser emitter, and the instruction carries the light emitting time of the two monochromatic laser emitters. Specifically, the light source assembly 1 can emit the mixed light of magenta or yellow-green as the stimulative, and control the color of the two corresponding monochromatic laser emitters combined into the mixed light to change slowly, thereby creating the effect of hazy star points.

For example, when white light is required in a certain period of time, the white light is formed by combining three light emission of a red laser emitter, a blue laser emitter and a green laser emitter, and the instruction carries the light emission time of the three monochromatic laser emitters. Specifically, the light source assembly 1 can emit white light as an embellishment, and adjust the brightness of three monochromatic laser emitters, so as to create a hierarchy of star point movement.

Alternatively, in other embodiments, the light source assembly 1 includes one light emitting device 11, and the light source of the light emitting device 11 may generate the outgoing light S, where the light source of the light emitting device 11 may be a collimated light source. The light emitting device 11 having the characteristic of a collimated light source may be a monochromatic laser emitter, a full-color laser generator, a tunable broad-spectrum laser emitter, or the like, or a collimated halogen lamp, an ultra-high voltage lamp, an LED lamp, or the like.

In some embodiments, the light source assembly 1 further includes a light source circuit board (not shown), the light source circuit board is a mounting substrate for the light emitting device 11, the light emitting device 11 is disposed on the light source circuit board, and the light emitting device 11 is electrically connected to the power supply through the light source circuit board. After the light source circuit board is electrified, the light emitting device 11 is lightened, and the light emitting device 11 can generate emergent rays S. As an example, the light source circuit board may be a hard circuit board to which the light emitting device 11 is attached.

In some embodiments, the number of light emitting devices 11 is the same as the number of light source circuit boards. When the number of the light emitting devices is one, the light emitting devices 11 are attached to a light source circuit board, and when the number of the light emitting devices is at least two, the light emitting devices can be attached to a light source circuit board.

For the rotating member 2, the at least one first reflecting surface 31 and the at least one second reflecting surface 32, in some embodiments, the rotating member 2, the at least one first reflecting surface 31 and the at least one second reflecting surface 32 may be separate structural members, where the at least one first reflecting surface 31 is located on at least one first reflecting element (not shown) and the at least one second reflecting surface 32 is located on at least one second reflecting element (not shown), and the rotating member 2 may be used as a supporting structure for the at least one first reflecting surface 31 and the at least one second reflecting element. Illustratively, the rotary member 2 has a hollow cylindrical structure as shown in fig. 1 to 3, and at least one first reflecting element and at least one second reflecting element are sequentially arranged on the outer peripheral surface of the rotary member 2 around the first axis M. Therefore, each reflecting element is not required to be fixedly connected with the rotating piece 2 through an additional connecting piece, so that the combined whole structure of each reflecting element and the rotating piece 2 is simple, and the space utilization rate of the projection device is improved. Of course, the structure of the rotating member 2 is not limited to a hollow cylindrical structure, for example, in other embodiments, the rotating member 2 may also have a polygonal prism structure, and at least one first reflective element and at least one second reflective element are disposed on each side of the rotating member 2.

In some embodiments, the outer circumferential surface of the rotating member 2 is provided with at least two mounting grooves, wherein the mounting grooves may be formed by recessing a portion of the outer circumferential surface toward the first axis M of the rotating member 2. The number of the mounting grooves is the same as the sum of the number of the first reflecting elements and the number of the second reflecting elements, the first reflecting elements are embedded in one mounting groove, and the second reflecting elements are embedded in the other mounting groove.

For convenience of description, referring to fig. 5 or 6, the mounting groove into which the first reflective element is embedded is defined as a first mounting groove 201. The mounting groove into which the second reflective element is embedded is defined as a second mounting groove 202 for illustration.

The first reflecting element is embedded in the first mounting groove 201, and the surface of the first reflecting element facing away from the rotating member 2 is the first reflecting surface 31. Illustratively, the first reflective element may be adhesively secured to the first mounting groove 201 by, but not limited to, glue. When the first reflective element is adhered to the first mounting groove 201 by glue, glue is applied to the first mounting groove 201, and then the first reflective element is placed in the first mounting groove 201, and before the glue is cured, the relative position of the first reflective element can be adjusted to change the reflection angle of the first reflective surface 31.

The second reflecting element is embedded in the second mounting groove 202, and the surface of the second reflecting element facing away from the rotating member 2 is the second reflecting surface 32. It is to be understood that the mounting manner between the second reflective element and the second mounting groove 202 may be the same as or different from the mounting manner between the first reflective element and the first mounting groove 201, so long as the second reflective element can be embedded in the second mounting groove 202, which is not particularly limited herein.

In some embodiments, the first reflective element and the second reflective element are substantially identical in construction. For example, the first reflecting element and the second reflecting element are one of a plane reflecting mirror, a reflecting prism, a beam splitting prism and a unidirectional cambered surface reflecting mirror. As illustrated, when the first reflecting element and the second reflecting element are both unidirectional cambered mirrors as illustrated in fig. 5 or 6 and the outgoing light S generated from the light source assembly 1 irradiates the first reflecting surface 31 or the second reflecting surface 32, since the first reflecting element or the second reflecting element is a unidirectional cambered mirror, not only the outgoing light S can be reflected to the target surface to form a star point, but also the star point on the target surface can be unidirectionally expanded along a direction parallel to the moving path thereof, thereby forming a meteor-like effect, and thus, when the rotating member 2 drives at least one first reflecting element and at least one second reflecting element to rotate to the light path of the outgoing light S in sequence, the meteor movement effect is generated at different positions on the target surface. Therefore, compared with the first reflecting element or the second reflecting element which is a plane reflecting mirror or a reflecting prism, the projection device provided by the application does not need to additionally arrange a part with a unidirectional beam expanding function, namely the part required by the projection device for realizing the meteor moving effect is smaller, so that the space utilization rate of the projection device is improved.

It should be noted here that the beam splitting prism also has the function of unidirectional beam expansion of outgoing light, and the unidirectional beam expansion principle is different from that of the unidirectional cambered surface reflecting mirror. In particular, it is possible to split an incident light beam into multiple beams by changing the angle of the incident light beam and utilizing the special optical properties of the prism, or to change the diameter and divergence angle of the light beam to achieve the effect of unidirectional beam expansion. Besides the two, the plane reflecting mirror or the reflecting prism has more functions of reflecting emergent rays, so that the effect of projecting meteor on the target surface can be realized by means of the component with the unidirectional beam expanding function.

Of course, the first reflective element 1 and the second reflective element 2 may also be configured differently. For example, the first reflecting element 1 is one of a plane mirror, a reflecting prism, a beam splitting prism, and a one-way cambered surface mirror. The second reflecting element 2 is another one of a plane reflecting mirror, a reflecting prism, a beam splitting prism and a unidirectional cambered surface reflecting mirror. The first reflecting element 1 is a planar reflecting mirror, the second reflecting element 2 is a unidirectional cambered reflecting mirror, and the principle of forming star points or meteorons on the target surface by the optical devices is mentioned above, please refer to the above related description, and the detailed description will not be repeated here.

Alternatively, in other embodiments, at least two reflective surfaces 3 may be integrated with the rotor 2. For example, the rotating member 2 has a substantially irregular polyhedral structure, and each surface surrounding the rotating member 2 is mirror-finished to form the at least one first reflecting surface 3 and the at least one second reflecting surface 32. Or the at least one first reflecting surface 31 and the at least one second reflecting surface 32 are formed by coating the reflecting layers around the surfaces of the rotating member 2.

The first reflecting surface 31 is a first portion of the outer peripheral surface of the rotor 2, and the first portion is obtained by mirror-surface treatment or coating of a reflecting layer. The second reflecting surface 312 is a second portion of the outer peripheral surface of the rotary member 2, which is obtained by mirror-surface treatment or coating of a reflecting layer. The second portion and the first portion are arranged about a first axis M.

In other embodiments, the first reflecting surface 31 and the second reflecting surface 32 are substantially the same in configuration, wherein the first reflecting surface 31 and the second reflecting surface 32 are each one of a planar reflecting surface, a reflecting prism surface, and a unidirectional cambered reflecting surface. Illustratively, the first reflective element 1 and the second reflective element 2 are both planar reflective surfaces. Of course, the types of the first reflecting surface 31 and the second reflecting surface 32 may be different. The first reflecting element 1 is one of a plane reflecting surface and a unidirectional cambered surface reflecting surface. The second reflecting element 2 is the other one of a plane reflecting surface and a unidirectional cambered surface reflecting surface. The first reflective element 1 is illustratively a planar reflective surface and the second reflective element 2 is a unidirectional cambered reflective surface.

Alternatively, in other embodiments, the first reflecting surface 31 and the second reflecting surface 32 may be formed in other ways, for example, one of the first reflecting surface 31 and the second reflecting surface 32 may be a part of the rotating member 2, which is obtained after mirror-treating or coating the reflecting layer, and the other of the first reflecting surface 31 and the second reflecting surface 32 may be a surface of an independent reflecting element facing away from the rotating member 2.

As shown in fig. 1, 5 or 6, in some embodiments, the first reflective surface 31 and the second reflective surface 32 are adjacent to each other on the outer peripheral surface of the rotary member 2. Thus, when the rotating member 2 rotates around the first axis M, the outgoing light S generated by the light source assembly 1 can be seamlessly switched from the first reflecting surface 31 to the second reflecting surface 32 adjacent thereto, so as to exhibit the effect of seamlessly moving the star point or meteor at different positions.

It should be noted that if the first reflecting surface 31 and the second reflecting surface 32 are integrated on the rotating member 2, or one of the first reflecting surface 31 and the second reflecting surface 32 is integrated on the rotating member 2, the other is a surface of the independent reflecting element facing away from the rotating member 2. The first reflecting surface 31 and the second reflecting surface 32 are adjacent to each other on the outer peripheral surface of the rotating member 2, or the first reflecting surface 31 is adjacent to the reflecting surface, the second reflecting surface 32 is adjacent to the reflecting surface, and the outgoing light S reflected by the transition surface between the two reflecting surfaces becomes disordered, so that the transition surface can be subjected to light absorption treatment based on the improvement of the experience of the projection device, so that the reflection of the transition surface is reduced. For example, a black light absorbing layer may be attached to the transition surface.

Alternatively, in other embodiments, the first reflecting surface 31 and the second reflecting surface 32 are provided at intervals on the outer peripheral surface of the rotary member 2. Therefore, when the rotating member 2 rotates around the first axis M, the position where the emergent light S generated by the light source is blocked by the rotating member 2, where the first reflecting element and the second reflecting element are not arranged, and cannot be reflected or is not changed, so that the effect that the meteor at different positions is re-moved at intervals is exhibited.

As shown in fig. 7 to 11, to simulate the effect of more natural meteor movement, the experience of the projection device is further improved, in some embodiments, the projection device includes a beam expander 4, the beam expander 4 is disposed on the light path of the reflected light beams of at least two reflection surfaces 3, and the beam expander 4 is configured to unidirectionally expand the outgoing light beam S reflected by each reflection surface 3 and transmit the unidirectionally expanded outgoing light beam. The beam expander 4 having the function of dispersing the emitted light S as described above may be any of a cylindrical lens, a cylindrical microlens array, a single-sided arc mirror, and a cylindrical grating.

For convenience of description, the outgoing light S reflected by one of the reflecting surfaces 3 is unidirectionally expanded by the beam expander 4, and the unidirectionally expanded outgoing light is transmitted.

When the beam expander 4 is a cylindrical lens as shown in fig. 7 and 8, the outgoing light S transmitted through the cylindrical lens is stretched in a direction parallel to the moving path of the target surface, so that the star point originally projected on the target surface is unidirectionally expanded into a meteor, and when the reflecting surface 3 irradiated by the outgoing light S rotates together with the rotating member, the outgoing angle of the formed outgoing light changes, and the imaging position on the target surface also changes, thereby realizing the meteor moving effect on the target surface.

When the beam expander 4 is a cylindrical microlens array as shown in fig. 9, the principle of light S divergence of the cylindrical microlens array is the same as that of the cylindrical lens, and thus the process of spreading the star points to form a meteor will not be described. But the difference with the cylindrical lens is that the cylindrical micro lens array can even light, and compared with the cylindrical lens, the cylindrical micro lens array has smaller volume and is more beneficial to improving the space utilization rate of the projection device.

When the beam expander 4 is a single-sided arc mirror as shown in fig. 10 and 11, the central axis of the single-sided arc mirror is substantially parallel to the first axis M. The light S reflected by the reflecting surface 3 is changed in outgoing direction again by the second optical device, and due to the curvature change of the single-sided arc-oriented reflecting mirror, star points can be generated successively on different areas of the same moving path on the target surface, so that a meteor is formed, and the meteor is more vivid in a dynamic picture on the moving path under the drive of the rotating member 2. Compared with the two lenses, the beam expander 4 is a one-way cambered surface reflecting mirror, so that the emergent direction of the light S can be changed, and the structural layout of the projection device becomes more flexible.

When the beam expanding piece 4 is a cylindrical grating, the light S reflected by the reflecting surface 3 can scan on the cylindrical grating, and a plurality of star points move on the target surface simultaneously under the drive of the rotating piece 2, so that a meteor-like raindrop effect is created, and the viewing experience of a user is enriched.

Alternatively, in other embodiments, the beam expander 4 is disposed between the light source assembly 1 and the rotating member 2, and the beam expander 4 is configured to unidirectionally expand the outgoing light S generated by the light source assembly 1, and to transmit the unidirectionally expanded outgoing light to at least one of the at least two reflecting surfaces 3. Compared with the beam expander 4 arranged on the light paths of the reflected light rays of the at least two reflecting surfaces 3, the beam expander 4 is arranged between the light source assembly 1 and the rotating member 2, and the emergent light rays S are firstly diverged by the beam expander 4 and then reflected from the reflecting surfaces 3 to the target surface. In addition, since the outgoing light S in the embodiment is first unidirectionally expanded by the beam expander 4 and then irradiated to at least one reflecting surface 3, the scattered meteor can cover at least one reflecting surface 3, so that two or more meteor scratch effects can be simultaneously presented.

Example two

Referring to fig. 12, fig. 12 is a schematic structural diagram of a projection apparatus according to a second aspect of the present application, in which each component of the projection apparatus is substantially the same as each component of the projection apparatus according to the first embodiment, the arrangement positions of the light source assembly 1 and the rotating member 2 are different, in the first embodiment, at least two reflecting surfaces 3 are located in front of the light emitting opening of the light emitting device 11, the light emitted from the light source assembly 1 directly reaches the rotating member, in the second embodiment, at least two reflecting surfaces 3 are not located in front of the light emitting opening of the light emitting device 11, a reflecting optical device 42 is disposed between the at least two reflecting surfaces 3 and the light source assembly 1, and the light emitted from the light source assembly 1 is reflected to the rotating member by the reflecting optical device 42, for example, as shown in any one of fig. 12 to 20, the projection apparatus includes a reflecting device 5, the reflecting device 5 is disposed between the light source assembly 1 and the rotating member 2, and the reflecting device 5 is used for reflecting the light emitted S to at least one reflecting surface 3 of the at least two reflecting surfaces 3. The direct light path between the light source component 1 and the rotating piece 2 is received by the reflecting device 5, so that the relative positions of the light source component 1 and the rotating piece 2 can be adjusted according to actual application requirements, and the flexibility of the structural layout of the projection device is improved.

Further, the mirror surface of the reflecting device 5 may be optically coated to remove the large-angle stray light generated by the light source assembly 1, i.e. the reflecting device 5 only reflects the collimated portion of the light source assembly 1 onto at least one reflecting surface 3, thereby improving the sharpness and contrast of the star points on the projection target surface.

In some embodiments, the reflecting device 5 is a planar mirror or a one-way cambered mirror. When the reflecting device 5 is a unidirectional cambered surface reflecting mirror, the reflecting device 5 can also perform unidirectional beam expansion on the emergent light S, and the beam expander 4 can be omitted, and the emergent light S can be subjected to unidirectional beam expansion only through the reflecting device 5, and the beam expander 4 can be arranged, so that double beam expansion on the emergent light S can be realized.

When the reflecting device 5 is a plane mirror, the reflecting device 5 may reflect only the outgoing light S, and at this time, the beam expander 4 may be configured to expand the outgoing light S in one direction, for example, as shown in fig. 13 and 14, the projection apparatus includes the beam expander 4, where the beam expander 4 is disposed on the light path of the reflected light of the at least two reflecting surfaces 3, and the beam expander 4 is configured to expand the outgoing light S reflected by the at least two reflecting surfaces 3 in one direction. The beam expander 4 having the function of dispersing the emitted light S as described above may be any of a cylindrical lens, a cylindrical microlens array, a single-sided arc mirror, and a cylindrical grating. It should be noted that the functions of each specific optical device 42 in the above technical solutions are already described, and will not be described in detail herein.

Alternatively, as shown in any one of fig. 15 to 20, in other embodiments, the beam expander 4 is disposed between the reflecting device 5 and the rotating member 2, and the beam expander 4 is configured to unidirectionally expand the outgoing light reflected by the reflecting device 5, and propagate the unidirectionally expanded outgoing light to the at least one reflecting surface 3. When the reflecting device 5 is a plane mirror, the beam expander 4 may be one of a cylindrical lens or a cylindrical microlens array, and the one of the cylindrical lens or the cylindrical microlens array is stacked on the plane mirror to achieve an effect similar to that of a unidirectional cambered surface mirror, so that the lens or the mirror for unidirectional beam expansion of the outgoing light S can be omitted on the reflection light path of the reflecting surface 3.

Alternatively, in other embodiments, the beam expander 4 is disposed between the light source assembly 1 and the reflecting device 5, and the beam expander 4 is configured to unidirectionally expand the outgoing light S generated by the light source assembly 1, and to transmit the unidirectionally expanded outgoing light to the reflecting device 5.

As shown in fig. 18 to 20, in order to facilitate adjusting the stretching effect of the outgoing light S to adjust the meteor effect, in some embodiments, the beam expander 4 also includes the aforementioned turntable 41 and the aforementioned at least two optical devices 42. The turntable 41 has a second axis N, at least two optics 42 are provided on the turntable 41, and each optics 42 is arranged around the second axis N. The turntable 41 can drive each optical device 42 to rotate around the second axis N, so that each optical device 42 sequentially rotates onto the optical path of the outgoing light S and expands the outgoing light S in one direction. Because the optical parameters of the optical devices 42 are different, the unidirectional beam expansion lengths of the outgoing light S transmitted by the optical devices 42 are different, so that different meteor effects can be generated conveniently. For example, the refractive index or curvature of each optic 42 is different, and the optic 42 is illustratively a lenticular lens or a lenticular lens.

In addition, the turntable 41 may be driven by other driving members to adjust the position of the optical device 42 relative to the rotating member. Illustratively, the driving member is in driving connection with the turntable 41, and the optical device 42 on the turntable 41, which is located on the outgoing light S, can be adjusted to move in a direction approaching the rotating member 2 or moving away from the rotating member 2, so that the focal length of the outgoing light S is changed, and thus the stretching effect of the outgoing light S is adjusted to adjust the meteor effect.

In some embodiments, the turntable 41 is adapted for driving connection with another power source, which may drive the turntable 41 to rotate about the second axis N.

For ease of understanding, the following description will exemplify the difference in refractive index between the optical devices 42 on the beam expander 4, and the turntable 41 of the beam expander 4 is drivingly connected to the power source. When the power source rotates to the optical device 42 with a certain refractive index, the optical device 42 with the refractive index can transmit the emergent light S or the emergent light S reflected by the reflecting surface 3, and then the light source assembly 1 is powered on, so that different numbers and positions of meteorons appear on the target surface at the same time. It will be appreciated that the type of power source may be varied, and that the various embodiments of the present application are not limited in detail. For example, the power source includes a motor, a cylinder, an oil cylinder, and other similar functional structures. Of course, the turntable 41 and the rotating member 2 may share the same power source, which may achieve different driving force outputs through different reduction gear mechanisms.

Based on the same technical concept, a second aspect of the present application provides a lamp, which includes a circuit board and the projection device mentioned in the first embodiment or the projection device mentioned in the second embodiment. The projection device can be electrically connected with the circuit board.

In some embodiments, the circuit board may include a control module, which may be a control chip. The control module is electrically connected with the power source and used for controlling the rotating speed of the rotating piece 2.

In some embodiments, the circuit board may further include a power module electrically connected to the light emitting device 11, the rotating member 2, and the beam expanding member 4, respectively.

The lamp can be divided into LOGO projection lamps, advertisement projection lamps, starry sky projection lamps and the like according to different appointed patterns. When the projection device is applied to a starry sky projection lamp, the designated pattern projected by the starry sky projection lamp and the star points reflected by at least two reflecting surfaces 3 are displayed in a superimposed mode, so that the moving picture of the meteor has layering sense and dynamic sense.

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present application, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

It should be noted that the above-mentioned embodiments are merely for illustrating the technical solution of the present application and not for limiting the same, and although the present application has been described in detail with reference to the above-mentioned embodiments, it will be understood by those skilled in the art that the technical solution described in the above-mentioned embodiments may be modified or some technical features may be equivalently replaced, and these modifications or replacements do not drive the essence of the corresponding technical solution to deviate from the spirit and scope of the technical solution of the embodiments of the present application.

Claims

1. A projection apparatus, comprising:

the light source component is used for generating emergent light;

A rotating member having a first axis;

At least two reflecting surfaces are arranged on the rotating piece, at least two reflecting surfaces are arranged around the first axis, at least one reflecting surface of the at least two reflecting surfaces is inclined relative to the first axis, and at least two reflecting surfaces respectively form different angles with the first axis;

The rotating piece can drive the at least two reflecting surfaces to rotate around the first axis, so that each reflecting surface can sequentially rotate to the light path of the emergent light.

2. The projection device of claim 1, wherein each of the reflective surfaces is inclined with respect to the first axis and each of the reflective surfaces is angled differently with respect to the first axis.

3. The projection device of claim 1, comprising a reflective device disposed between the light source assembly and the rotating member, the reflective device configured to reflect the outgoing light rays to at least one of the at least two reflective surfaces.

4. A projection apparatus according to claim 3 wherein the reflecting means is a planar mirror or a one-way cambered mirror.

5. A projection device as claimed in claim 1 or 3, wherein the projection device comprises a beam expander;

The beam expander is arranged on the light path of the reflected light rays of the at least two reflecting surfaces and is used for carrying out unidirectional beam expansion on the emergent light rays reflected by the reflecting surfaces and transmitting the emergent light rays after unidirectional beam expansion, or

The beam expanding piece is arranged between the light source assembly and the rotating piece, and is used for carrying out unidirectional beam expansion on the emergent light generated by the light source assembly and transmitting the emergent light subjected to unidirectional beam expansion to at least one of the at least two reflecting surfaces.

6. The projection device of claim 5, wherein each of the reflecting surfaces is a one-way cambered surface reflecting surface, and/or,

The beam expanding piece comprises one of a cylindrical lens, a cylindrical micro lens array, a unidirectional cambered surface reflecting mirror and a cylindrical lens grating.

7. The projection device of claim 5, wherein the beam expander comprises a turntable and at least two optical elements disposed on the turntable, the turntable having a second axis, each of the optical elements being disposed about the second axis;

The turntable can drive each optical element to rotate around the second axis so as to enable each optical element to sequentially rotate to the light path of the emergent light reflected by the reflecting device;

The optical elements are used for carrying out unidirectional beam expansion on the emergent light transmitted by the optical elements and transmitting the emergent light subjected to unidirectional beam expansion to at least one of the at least two reflecting surfaces, wherein the optical parameters of the optical elements are different, and the unidirectional beam expansion lengths of the optical elements on the emergent light transmitted by the optical elements are also different.

8. The projection device of claim 7, wherein the optical element is a lenticular lens or a lenticular grating.

9. The projection apparatus according to claim 1 or 3, wherein the light source assembly comprises at least three light emitting devices and at least two beam combining elements, wherein the wavelengths of the light emitted by the light emitting devices are different, and the light emitted by the light emitting devices is combined by the at least two beam combining elements to form an emergent ray with a composite color of the light source assembly;

the at least three light emitting devices comprise a first light emitting device and at least two second light emitting devices, the emergent direction of the first light emitting device is the emergent direction of emergent light, the emergent directions of the at least two second light emitting devices are perpendicular to the emergent direction of the first light emitting device, and the at least two beam combining elements are respectively arranged at the perpendicular intersection positions of light with two different wavelengths.

10. A projection apparatus according to claim 1 or 3, wherein the projection apparatus comprises the same number of reflection elements as the reflection surfaces, each of the reflection elements being fixedly provided to an outer peripheral surface of the rotating member, and each of the reflection elements being sequentially arranged around the first axis;

wherein the surface of the reflecting element facing away from the rotating piece is the reflecting surface.

11. A projection apparatus according to claim 1 or 3, wherein one of the reflecting surfaces is a part of the outer peripheral surface of the rotating member.

12. A light fixture, comprising:

circuit board, and

The projection device of any of claims 1-11, being electrically connected to the circuit board.