CN221592620U - Projection imaging device and projection lamp - Google Patents

Abstract

The present application relates to a projection imaging apparatus and a projection lamp. The projection imaging apparatus includes: the coherent light source is used for generating incident point-like light; the first optical element is arranged on the light path of the incident point light, and the incident point light is converted into linear light after passing through the first optical element; the rotary optical module comprises a rotary piece and a second optical element connected with the rotary piece, wherein the second optical element can rotate around a preset rotation axis to the light path of linear light under the drive of the rotary piece, and the linear light forms a linear light array after passing through the second optical element; when the second optical element rotates, the incident angle of the linear light on the second optical element changes. Incident point light generated by the coherent light source sequentially passes through the first optical element and the second optical element to obtain a linear light array, and along with the rotation of the second optical element, the projection position of the linear light array on the projection surface can be moved, so that rich imaging effects are created, and the viewing experience of a user is enriched.

Description

Projection imaging device and projection lamp

Technical Field

The present application relates to the field of projection imaging technology, and in particular to a projection imaging device and a projection lamp.

Background Art

Existing starry sky lights mostly use laser to illuminate a rotating grating sheet, thereby obtaining an overall rotating star field, while the relative distance between the light spots in the star field remains unchanged. Alternatively, a grating sheet can be further fixed at the laser emission port, and by irradiating two grating sheets, the effect of irregular rotation of some light spots can be presented on the basis of the overall rotation of the star field. However, both solutions can only achieve the rotation of the light spot, and the imaging effect is relatively simple.

Utility Model Content

Based on this, it is necessary to provide a projection imaging device with richer imaging effects, and also provide a projection lamp including the above-mentioned projection imaging device.

A projection imaging device, comprising:

A coherent light source for generating incident point light;

A first optical element is disposed on the optical path of the incident point light, and the incident point light is converted into linear light after passing through the first optical element; and

A rotating optical module includes a rotating member and a second optical element connected to the rotating member. The second optical element can be driven by the rotating member to rotate around a predetermined rotation axis to the optical path of the linear light. The linear light forms a linear light array after passing through the second optical element. When the second optical element rotates, the incident angle of the linear light on the second optical element changes.

In one embodiment, the first optical element is a refractive optical element or a diffractive optical element; there are multiple second optical elements, and the multiple second optical elements are evenly distributed on the same circumference centered on the predetermined rotation axis.

In one embodiment, the linear light is in the shape of a straight line, a snowflake, or a water drop.

In one embodiment, the projection imaging device includes a reflector, which is disposed on an optical path between the coherent light source and the first optical element. The incident point light is reflected by the reflector to change its direction and then enters the first optical element.

In one embodiment, the reflector is located at the predetermined rotation axis and is fixed relative to the first optical element; the incident point light reflected by the reflector is incident on the first optical element along a direction perpendicular to the predetermined rotation axis and perpendicular to the plane where the first optical element is located.

In one embodiment, the projection imaging device includes a reflector, which is disposed on the optical path between the first optical element and the second optical element. The linear light is reflected by the reflector to change its direction and then enters the second optical element.

In one embodiment, the first optical element is mounted on the coherent light source, and the incident point light is incident on the first optical element along a direction perpendicular to the plane where the first optical element is located; the linear light is reflected by the reflector and then incident on the second optical element along a direction perpendicular to the predetermined rotation axis.

In one embodiment, the coherent light source, the first optical element and the rotating optical module together constitute an optical module. There are multiple optical modules, and the multiple optical modules are distributed at intervals on the same circumference.

In one embodiment, the projection imaging device includes a plurality of driving components, the plurality of driving components correspond one-to-one to the plurality of optical modules, the driving components are connected to the rotating parts in the corresponding optical modules to drive the rotating parts to rotate; or, the projection imaging device includes a driving component, the driving component is connected to the rotating parts in the plurality of optical modules to drive the plurality of rotating parts to rotate.

In the above-mentioned projection imaging device, the incident point light generated by the coherent light source is first transformed into linear light through the first optical element, and the linear light forms a linear light array after further passing through the second optical element. The incident angle of the linear light on the second optical element changes with the rotation of the second optical element, so that the position of the linear light array projected on the projection surface moves, thereby creating a rich imaging effect and enriching the user's viewing experience.

A projection lamp comprises the above-mentioned projection imaging device.

The above-mentioned projection lamp can create rich imaging effects under the effect of the projection imaging device, thereby enriching the user's viewing experience.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

FIG1 is a top view of a projection imaging device according to an embodiment of the present application;

Fig. 2 is a cross-sectional view of the projection imaging device shown in Fig. 1 at A-A;

FIG3 is a side view of the projection imaging device shown in FIG2 ;

FIG4 is a cross-sectional view of a projection imaging device in another embodiment;

FIG5 is a side view of the projection imaging device shown in FIG4 from another viewing angle;

FIG6 is a schematic structural diagram of a projection imaging device according to yet another embodiment;

FIG7 is a side view of the projection imaging device shown in FIG6;

FIG8 is a top view of a projection imaging device according to yet another embodiment;

FIG9 is a side view of the projection imaging device shown in FIG8;

FIG10 is an imaging effect diagram of the projection imaging device shown in FIG9 ;

Description of reference numerals:

10. Projection imaging device; 100. Coherent light source; 200. First optical element; 300. Rotating optical module; 310. Rotating member; 320. Second optical element; O. Predetermined rotation axis; 400. Reflector; 500. Driving assembly; 510. Transmission member; 600. Support plate; 610. First supporting seat; 620. Second supporting seat; 630. Connecting member; 10a. Optical module.

DETAILED DESCRIPTION

In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

In the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

In conjunction with FIGS. 1 to 10 , the present application protects a projection imaging device 10. The projection imaging device 10 can be applied to a projection lamp, which is a lamp used to project a specified pattern onto a projection surface such as the ground, a wall, or a ceiling. The projection lamp can be a LOGO projection lamp, an advertising projection lamp, or a starry sky projection lamp, etc.

The projection imaging device 10 includes a coherent light source 100, a first optical element 200 and a rotating optical module 300. The coherent light source 100 is used to generate incident point light. The first optical element 200 is arranged on the optical path of the incident point light, and the incident point light is converted into linear light after passing through the first optical element 200. The rotating optical module 300 includes a rotating member 310 and a second optical element 320 connected to the rotating member 310. The second optical element 320 can be driven by the rotating member 310 to rotate around a predetermined rotation axis O to the optical path of the linear light, and the linear light forms a linear light array after passing through the second optical element 320. When the second optical element 320 rotates, the incident angle of the linear light on the second optical element 320 changes.

It can be understood that the linear light is a light beam that can project a line on the projection surface, and the linear light array is a light beam that can project a plurality of lines arranged in an array on the projection surface.

In the present application, the linear light is in the shape of an "I". When the rotating member 310 drives the second optical element 320 to rotate, the incident angle of the linear light on the second optical element 320 changes, so that the linear light array emitted from the second optical element 320 presents a plurality of "I"-shaped lines on the projection surface, and the position of each line can be moved, thereby presenting a projection effect of a meteor shower.

In other embodiments, the linear light can also be in the shape of a snowflake, that is, the shape of a snowflake is formed by lines. In this way, after the linear light passes through the second optical element 320, the linear light array emitted from the second optical element 320 presents a plurality of snowflake shapes on the projection surface, and during the rotation of the second optical element 320, the position of the snowflake moves, thereby presenting a projection effect of falling snowflakes.

In other embodiments, the linear light can also be in the shape of raindrops, that is, the line forms the shape of raindrops, so that after the linear light passes through the second optical element 320, the linear light array emitted from the second optical element 320 presents the shape of multiple raindrops on the projection surface, and the position of the raindrops moves during the rotation of the second optical element 320, thereby presenting a projection effect of falling raindrops. In the above-mentioned projection imaging device 10, the incident point light generated by the coherent light source 100 is first transformed into linear light after passing through the first optical element 200, and the linear light forms a linear light array after further passing through the second optical element 320, and the incident angle of the linear light on the second optical element 320 changes with the rotation of the second optical element 320, so that the position of the linear light array projected on the projection surface moves, thereby creating a rich imaging effect and enriching the user's viewing experience.

Specifically in the present application, the coherent light source 100 is a laser generator, so that the incident point light is laser. The second optical element 320 is specifically a starry sky diffraction grating. The first optical element 200 can be a refractive optical element or a diffractive optical element. In the present application, the first optical element 200 is specifically a cylindrical grating lens with a plurality of linearly arranged lens strips on the light-emitting surface.

In the embodiments shown in FIGS. 1 to 3 , the projection imaging device 10 includes a reflector 400, which is disposed on the optical path between the coherent light source 100 and the first optical element 200. The incident point light is reflected by the reflector 400 to change its direction and then enter the first optical element 200. It can be understood that when the setting position of the coherent light source 100 is changed because the coherent light source 100 cannot be set at a specific position, the incident point light is reflected by the reflector 400 to change the irradiation direction, so that the light beam can be incident to the first optical element 200 along a predetermined path. In this way, the setting of the reflector 400 can reduce the requirements for the setting position of the coherent light source 100. Specifically, the reflector 400 is a plane reflector 400, and the plane where the reflector 400 is located is inclined relative to the incident point light, so as to reflect the incident point light and change its direction.

In the present application, the reflector 400 is located at the predetermined rotation axis O and is fixed relative to the first optical element 200. The incident point light reflected by the reflector 400 is incident on the first optical element 200 along a direction perpendicular to the predetermined rotation axis O and perpendicular to the plane where the first optical element 200 is located. The side of the first optical element 200 away from the reflector 400 is a light emitting surface, and the light emitting surface has a plurality of linearly arranged lens strips, and the extension direction of the lens strips is parallel to the predetermined rotation axis O. In this way, the incident point light becomes a linear light parallel to the rotation plane of the rotating member 310 after passing through the first optical element 200.

Specifically, there is one reflector 400, and the incident point light is incident on the reflector 400 along the predetermined rotation axis O. After being reflected by the reflector 400, the light beam is emitted along the radial direction of the rotation circle of the second optical element 320, and further irradiates the first optical element 200 vertically. In other embodiments, the incident point light may not be incident along the predetermined rotation axis O. In this case, multiple reflectors 400 may be provided, and the multiple reflectors 400 sequentially reflect the incident point light on the optical path of the incident point light, so as to cooperate together to make the light beam incident on the first optical element 200 along the set path.

In the embodiment shown in FIG. 4 and FIG. 5 , the projection imaging device 10 includes a reflector 400, which is disposed on the optical path between the first optical element 200 and the second optical element 320. The linear light is reflected by the reflector 400 to change its direction and then incident on the second optical element 320. It can be understood that by reflecting the linear light by the reflector 400 to change its irradiation direction, the requirements for the location of the coherent light source 100 and the first optical element 200 can be reduced. Specifically, the reflector 400 is a plane reflector 400, and the plane where the reflector 400 is located is inclined relative to the incident direction of the linear light, so as to reflect the linear light and change its direction.

Specifically, the first optical element 200 is mounted on the coherent light source 100, and the incident point light is incident on the first optical element 200 along a direction perpendicular to the plane where the first optical element 200 is located. The linear light is reflected by the reflector 400 and then incident on the second optical element 320 along a direction perpendicular to the predetermined rotation axis O. In this embodiment, the plane where the first optical element 200 is located is arranged perpendicular to the predetermined rotation axis O, and after the incident point light is incident on the first optical element 200 along the predetermined rotation axis O, the linear light emitted from the first optical element 200 is irradiated to the reflector 400 along the predetermined rotation axis O, and then irradiated to the second optical element 320 along a direction perpendicular to the predetermined rotation axis O after being reflected by the reflector 400.

Furthermore, the lens strip of the first optical element 200 extends in a direction perpendicular to the predetermined rotation axis O, so that the linear light not reflected by the reflector 400 is perpendicular to the rotation plane of the rotating member 310, and the linear light after being reflected by the reflector 400 is parallel to the rotation plane of the rotating member 310 and is incident on the second optical element 320.

In the embodiments shown in FIG. 6 and FIG. 7 , the reflector 400 can also be omitted. In this case, the first optical element 200 is mounted on the coherent light source 100, and the incident point light is irradiated to the first optical element 200 in a direction perpendicular to the plane where the first optical element 200 is located. Further, by making the incident point light emerge along the radial direction of the rotation circle of the second optical element 320, and the extension direction of the lens strip on the first optical element 200 is parallel to the predetermined rotation axis O, the incident point light can be transformed into a linear light parallel to the rotation plane of the rotating member 310 after passing through the first optical element 200.

As shown in combination with FIG. 1 to FIG. 7 , in some embodiments, there are multiple second optical elements 320, and the multiple second optical elements 320 are evenly distributed on the same circumference centered on the predetermined rotation axis O. By setting multiple second optical elements 320, the multiple second optical elements 320 rotate around the predetermined rotation axis O driven by the rotating member 310, and the linear light is sequentially irradiated onto the multiple second optical elements 320. In the present application, the plane where the second optical element 320 is located is parallel to the predetermined rotation axis O but not coplanar, so that when the second optical element 320 rotates with the rotating member 310, the linear light radially incident along the rotation circle of the second optical element 320 can be irradiated onto the second optical element 320.

As shown in Figures 8 to 10, in the present application, a coherent light source 100, a first optical element 200 and a rotating optical module 300 together constitute an optical module 10a. There are multiple optical modules 10a, and the multiple optical modules 10a are distributed at intervals on the same circle. The multiple optical modules 10a work together to produce a projection effect similar to a space-time tunnel.

In the present application, the projection imaging device 10 includes a driving assembly 500, which is located in a space surrounded by multiple optical modules 10a, and the driving assembly 500 is simultaneously connected to the rotating members 310 in the multiple optical modules 10a to simultaneously drive the multiple rotating members 310 to rotate. The driving assembly 500 includes a driving motor (not shown) and a transmission member 510, the transmission member 510 is a worm, and the rotating member 310 is a gear meshing with the transmission member 510. The rotating member 310 can be a helical gear, a cylindrical gear or a turbine.

In other embodiments, a plurality of drive assemblies 500 may be provided, and the plurality of drive assemblies 500 correspond to the plurality of optical modules 10a one by one, and the drive assemblies 500 are connected to the rotating member 310 in the corresponding optical module 10a to drive the rotating member 310 to rotate. In this way, under the drive of the plurality of drive assemblies 500, a projection effect similar to a space-time tunnel can also be generated.

Specifically, the projection imaging device 10 includes a support plate 600, and the coherent light source 100 and the rotating member 310 are both mounted on the support plate 600. Further, a first support seat 610 and a second support seat 620 may be provided on the support plate 600, the coherent light source 100 is fixedly mounted on the first support seat 610, the rotating member 310 is rotatably mounted on the second support seat 620, the driving motor is fixedly mounted on the support plate 600, and the transmission member 510 penetrates the support plate 600 and is engaged with the rotating member 310.

Specifically, for the installation of the first optical element 200, in the embodiment shown in FIG2, the second support seat 620 is fixedly connected to a connecting member 630 at a position corresponding to the predetermined rotation axis O, the connecting member 630 passes through the rotating member 310, and the reflector 400 and the first optical element 200 are fixedly installed on the connecting member 630, thereby achieving relative fixation. In the two embodiments shown in FIG5 and FIG7, the first optical element 200 is installed on the coherent light source 100.

The present application also protects a projection lamp, which includes the above-mentioned projection imaging device 10. The projection lamp may also include a circuit board, which controls the light emission of the coherent light source 100 and the power output of the driving component 500. The projection lamp may be a LOGO projection lamp, an advertising projection lamp, or a starry sky projection lamp, etc., and can present a projection effect similar to a meteor shower or a time-space tunnel, enriching the user's viewing experience.

The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims (10)

1. A projection imaging apparatus, comprising:

a coherent light source for generating incident point-like light;

A first optical element provided on an optical path of the incident point light, the incident point light being converted into linear light after passing through the first optical element; and

The rotating optical module comprises a rotating piece and a second optical element connected with the rotating piece, wherein the second optical element can rotate to the light path of the linear light around a preset rotating shaft under the drive of the rotating piece, and the linear light forms a linear light array after passing through the second optical element; the angle of incidence of the line light on the second optical element changes as the second optical element rotates.

2. The projection imaging apparatus of claim 1, wherein the first optical element is a refractive optical element or a diffractive optical element; the second optical elements are uniformly distributed on the same circumference taking the preset rotation axis as the center.

3. The projection imaging apparatus of claim 1, wherein the line light is in a "one" shape or a snowflake shape or a drop shape.

4. A projection imaging apparatus according to any one of claims 1 to 3, comprising a mirror disposed on an optical path between the coherent light source and the first optical element, the incident spot light being reflected by the mirror to change direction and then incident on the first optical element.

5. The projection imaging apparatus of claim 4, wherein the mirror is positioned at the predetermined rotation axis and is fixed relative to the first optical element; the incident spot light reflected by the reflecting mirror is incident on the first optical element in a direction perpendicular to the predetermined rotation axis and perpendicular to a plane in which the first optical element is located.

6. A projection imaging apparatus according to any one of claims 1 to 3, comprising a mirror provided on an optical path between the first optical element and the second optical element, the linear light being reflected by the mirror to change direction and then incident on the second optical element.

7. The projection imaging apparatus of claim 6, wherein the first optical element is mounted to the coherent light source, the incident spot light being incident on the first optical element in a direction perpendicular to a plane in which the first optical element is located; the linear light is reflected by the reflecting mirror and then enters the second optical element along the direction perpendicular to the preset rotating shaft.

8. The projection imaging apparatus of claim 1, wherein the coherent light source, the first optical element and the rotating optical module together form an optical module, and a plurality of the optical modules are distributed on the same circumference at intervals.

9. The projection imaging apparatus according to claim 8, wherein the projection imaging apparatus includes a plurality of driving assemblies, the plurality of driving assemblies being in one-to-one correspondence with the plurality of optical modules, the driving assemblies being connected with the rotating members in the optical modules corresponding thereto to drive the rotating members to rotate; or the projection imaging device comprises a driving assembly, wherein the driving assembly is connected with the rotating parts in the optical modules so as to drive the rotating parts to rotate.

10. A projection lamp comprising a projection imaging apparatus according to any one of claims 1 to 9.