CN118151480A - Combined lens and projection device - Google Patents

Abstract

The application provides a combined lens and a projection device, wherein the combined lens is used for a projector, the projector is provided with a projection lens, the projection lens is used for projecting projection light, and the combined lens comprises: the fish-eye lens group is arranged on one side of the projection lens; the reflecting mirror is movably arranged between the projection lens and the fisheye lens group; in the first projection mode, the reflecting mirror is positioned on an emergent light path of the projection lens and is used for reflecting projection light rays emitted by the projection lens; in the second projection mode, the reflecting mirror deviates from an emergent light path of the projection lens, and projection light rays emitted by the projection lens are emergent through the fisheye lens group. The application can project pictures in at least two directions through a single projector, and realizes plane display and three-dimensional display.

Description

Combined lens and projection device

Technical Field

The application relates to the technical field of projection, in particular to a combined lens and a projection device.

Background

With the development of metauniverse, holographic projection and other technologies, higher requirements are put forward on the display mode. Taking holographic projection as an example, holographic projection is generally required to be realized in places such as holographic restaurants, KTV rooms, holographic wedding venues and the like in daily life.

In the related art, a single projector can only project a picture in one direction, and when a stereoscopic picture is projected, multiple projectors are required to project together, so that the cost and the energy consumption are high.

In view of the above, the present application provides a new combination lens and a projection device, so as to at least partially solve the above problems.

Disclosure of Invention

In the summary, a series of concepts in a simplified form are introduced, which will be further described in detail in the detailed description. The summary of the invention is not intended to define the key features and essential features of the claimed subject matter, nor is it intended to be used as an aid in determining the scope of the claimed subject matter.

In one aspect, the present application provides a combination lens for a projector, the projector having a projection lens for projecting projection light, the combination lens comprising: the fish-eye lens group is arranged on one side of the projection lens; the reflecting mirror is movably arranged between the projection lens and the fisheye lens group; in the first projection mode, the reflecting mirror is positioned on an emergent light path of the projection lens and is used for reflecting projection light rays emitted by the projection lens; in the second projection mode, the reflecting mirror deviates from an emergent light path of the projection lens, and projection light rays emitted by the projection lens are emergent through the fisheye lens group.

In one example, in a first projection mode, a first angle is formed between a reflective surface of the mirror and an optical axis of the projection lens.

In one example, the first angle is 30 ° to 60 °.

In one example, the optical axis of the fisheye lens set coincides with or is parallel to the optical axis of the projection lens.

In yet another aspect, the present application provides a projection apparatus, including: a projector having a projection lens for projecting projection light; the combination lens according to any one of the above claims, wherein the combination lens is disposed at a side of the projection lens from which the projection light is projected.

In one example, the mirror is configured to be switchable between an outgoing light path at the projection lens and an outgoing light path offset from the projection lens such that the projection device switches between a first projection mode in which a picture reflected by the mirror is a planar picture and a second projection mode in which a picture projected by the fisheye lens set is a stereoscopic picture.

In one example, the projector further includes a light source assembly, an optical-mechanical assembly, and a driver, where the optical-mechanical assembly is located between the light source assembly and the projection lens, and in the first projection mode, the driver is configured to drive the projection lens to move, so that a center of the light source assembly deviates from an optical axis of the projection lens, so as to adjust a projection position of the projection light reflected by the reflector.

In one example, the opto-mechanical assembly includes a display chip, and the distance between the projection lens and the fisheye lens set is positively correlated with the size of the display chip.

In one example, the display chip has a size of 0.23 inch to 0.47 inch.

In one example, when the size of the display chip is 0.23 inches, the distance between the lens barrel and the fisheye lens set is not less than 24mm.

In one example, when the size of the display chip is 0.33 inches, the distance between the lens barrel and the fisheye lens set is not less than 32mm.

In one example, when the size of the display chip is 0.47 inches, the distance between the lens barrel and the fisheye lens set is not less than 42mm.

In one example, the reflecting surface of the reflecting mirror has a dimension D in the longitudinal direction, and D satisfies the following condition:

D≥d/cosα

In the first projection mode, a first angle is formed between the reflecting surface of the reflecting mirror and the optical axis of the projection lens, alpha is the first angle, and d is the distance between the projection lens and the fisheye lens set.

In one example, a distance between the projection lens and the fisheye lens set is positively correlated with a throw ratio of the projection lens.

In one example, the projection ratio of the projection lens is 1.2:1.

According to the combined lens and the projection device, the position of the reflecting mirror is changed, so that the projector can realize two projection modes; in a first projection mode, projection light rays emitted by a projection lens are reflected by a reflecting mirror, and the reflected projection light rays form a plane picture in one direction; in the second projection mode, the projection light rays emitted by the projection lens are emitted through the fisheye lens group, and the projection light rays form a stereoscopic picture in the other direction, so that the picture can be projected in at least two directions through a single projector, planar display and stereoscopic display are realized, further, the cost and the energy consumption can be remarkably reduced, the quantity of the projectors is reduced, the heat accumulation in a sealed space can be reduced, the heat dissipation efficiency is improved, and meanwhile, the noise of the sealed space can be reduced.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort to a person skilled in the art.

In the drawings:

FIG. 1 shows a schematic diagram of a projector;

FIG. 2 shows a schematic view of a single projector projecting a picture;

FIG. 3 is a schematic diagram showing a plurality of projectors projecting a stereoscopic multi-aspect picture;

Fig. 4 is a schematic diagram showing a structure of a projector configured with a combination lens according to an embodiment of the application;

FIG. 5 is a schematic view showing a projector configured with a combination lens projecting a planar screen according to an embodiment of the application;

FIG. 6 is a schematic diagram showing a projector configured with a combination lens projecting a stereoscopic image according to an embodiment of the application;

FIG. 7 is a schematic diagram showing a structure of a projection apparatus according to an embodiment of the present application;

FIG. 8 shows an exploded view of a projection device according to an embodiment of the application;

FIG. 9 shows a schematic view of a projection device according to an embodiment of the application in a first projection mode;

FIG. 10 shows a schematic view of a projection device in a second projection mode according to an embodiment of the application;

FIG. 11 shows a schematic view of a projection device according to an embodiment of the application in a first projection mode;

FIG. 12 is a schematic view of a projection apparatus according to an embodiment of the present application in a second projection mode;

FIG. 13 shows a schematic view of a projection apparatus according to an embodiment of the application in a first projection mode;

Fig. 14 shows a schematic view of a projection device according to an embodiment of the application in a second projection mode.

Detailed Description

In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present application. It will be apparent, however, to one skilled in the art that the application may be practiced without one or more of these details. In other instances, well-known features have not been described in detail in order to avoid obscuring the application.

It should be understood that the present application may be embodied in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the application to those skilled in the art. In the drawings, the size of layers and regions, as well as the relative sizes, may be exaggerated for clarity. Like numbers refer to like elements throughout.

It will be understood that when an element or layer is referred to as being "on," "adjacent," "connected to," or "coupled to" another element or layer, it can be directly on, adjacent, connected, or coupled to the other element or layer, or intervening elements or layers may be present. In contrast, when an element is referred to as being "directly on," "directly adjacent to," "directly connected to," or "directly coupled to" another element or layer, there are no intervening elements or layers present. It will be understood that, although the terms first, second, third, etc. may be used herein to describe various elements, components, regions, layers and/or sections, these elements, components, regions, layers and/or sections should not be limited by these terms. These terms are only used to distinguish one element, component, region, layer or section from another element, component, region, layer or section. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the present application.

Spatially relative terms, such as "under," "below," "beneath," "under," "above," "over," and the like, may be used herein for ease of description to describe one element or feature's relationship to another element or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use and operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements or features described as "under" or "beneath" other elements would then be oriented "on" the other elements or features. Thus, the exemplary terms "below" and "under" may include both an upper and a lower orientation. The device may be otherwise oriented (rotated 90 degrees or other orientations) and the spatially relative descriptors used herein interpreted accordingly.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, operations, elements, components, and/or groups thereof. As used herein, the term "and/or" includes any and all combinations of the associated listed items.

In order to provide a thorough understanding of the present application, detailed structures will be presented in the following description in order to illustrate the technical solutions presented by the present application. Preferred embodiments of the present application are described in detail below, however, the present application may have other embodiments in addition to these detailed descriptions.

As shown in fig. 1 to 3, in the related art, a projector 100 is composed of a device main body 110 and a projection lens 120, and when projection is performed, the projector 100 is disposed in an enclosed space 200, a projection light 300 projected by a single projector 100 can only project a picture in one direction (as shown in fig. 2), and when a stereoscopic picture (holographic projection, which may also be referred to as stereoscopic display) is projected, multiple projectors 100 are required to jointly project a partial projection of multiple directions and multiple pictures, and then a holographic display effect is realized based on a fusion manner (as shown in fig. 3).

However, implementing holographic projection by using a plurality of projectors 100 results in high cost and energy consumption, and the plurality of projectors 100 are disposed in one enclosed space 200, each projector 100 needs to dissipate heat, which results in heat accumulation in the enclosed space 200, difficulty in heat dissipation, and increased noise in the enclosed space 200.

In order to solve the problem that a single projector can only project a picture in one direction and a plurality of projectors are required to project a stereoscopic picture together, the application provides a combined lens for a projector, the projector is provided with a projection lens, the projection lens is used for projecting projection light, and the combined lens comprises: the fish-eye lens group is arranged on one side of the projection lens; the reflecting mirror is movably arranged between the projection lens and the fisheye lens group; in the first projection mode, the reflecting mirror is positioned on an emergent light path of the projection lens and is used for reflecting projection light rays emitted by the projection lens; in the second projection mode, the reflecting mirror deviates from an emergent light path of the projection lens, and projection light rays emitted by the projection lens are emergent through the fisheye lens group.

According to the combined lens, the position of the reflecting mirror is changed, so that the projector can realize two projection modes; in a first projection mode, projection light rays emitted by a projection lens are reflected by a reflecting mirror, and the reflected projection light rays form a plane picture in one direction; in the second projection mode, the projection light rays emitted by the projection lens are emitted through the fisheye lens group, and the projection light rays form a stereoscopic picture in the other direction, so that the picture can be projected in at least two directions through a single projector, and planar display and stereoscopic display are realized.

Moreover, based on the combined lens, the single projector is utilized to realize the planar display and the three-dimensional display, so that the cost and the energy consumption can be obviously reduced, the number of the projectors is reduced, the heat accumulation in the sealed space can be reduced, the heat dissipation efficiency is improved, and meanwhile, the noise of the sealed space can be reduced.

In addition, based on the combined lens, in the second projection mode, the projection light emitted by the fish-eye lens group can also realize the illumination effect, so that the projector can realize the projection effect and the illumination effect.

The combined lens of the present application will be explained and explained with reference to fig. 4 to 6. Fig. 4 is a schematic diagram showing a structure of a projector configured with a combination lens according to an embodiment of the application; FIG. 5 is a schematic view showing a projector configured with a combination lens projecting a planar screen according to an embodiment of the application; fig. 6 is a schematic diagram showing a stereoscopic image projected by a projector configured with a combination lens according to an embodiment of the application. The technical features of the various embodiments of the present application may be combined with each other without conflict.

In one embodiment of the present application, as shown in fig. 4, a combined lens is used for a projector 400, the projector 400 has a projection lens 410, the projection lens 410 is used for projecting projection light, the combined lens includes a mirror 510, and the mirror 510 is movably disposed at one side of the projection lens 410.

Notably, the position of the mirror 510 can be adjusted manually or automatically. For example, after the combination lens is disposed on the projector 400, the user may manually adjust the position of the mirror 510 to position the mirror 510 on the outgoing light path of the projection lens 410 or to deviate the mirror 510 from the outgoing light path of the projection lens 410 (i.e., the mirror 510 is not positioned on the outgoing light path of the projection lens 410) when performing projection using the projector 400. Alternatively, an actuator may be provided in the combined lens, and the position of the reflecting mirror 510 may be automatically adjusted by the actuator so that the reflecting mirror 510 is positioned on the outgoing light path of the projection lens 410 or is deviated from the outgoing light path of the projection lens 410.

In the first projection mode, the reflecting mirror 510 is located on an outgoing light path of the projection lens 410, and the reflecting mirror 510 is configured to reflect the projection light emitted by the projection lens 410. Specifically, the position of the mirror 510 may be adjusted in the manner described above so that the mirror 510 is positioned in the outgoing light path of the projection lens 410. At this time, as shown in fig. 5, the projector 400 is in the first projection mode, the projection light emitted from the projection lens 410 irradiates the reflecting mirror 510, the reflecting mirror 510 reflects the projection light, and the reflected projection light 310 forms a planar image in the first direction, so as to achieve a planar display effect.

In one example, in the first projection mode, a first angle is formed between the reflective surface of the reflector 510 and the optical axis of the projection lens 410. Because of the angle between the reflecting surface of the reflecting mirror 510 and the optical axis of the projection lens 410, the projection light incident on the reflecting mirror 510 is reflected to one side of the projector 400. By adjusting the first angle, the position of the planar screen projected by the projection light 310 can be changed. For example, when the projector 400 is disposed on a ceiling, the projection light 310 projected by the projection lens 410 is reflected by the reflecting mirror 510 to form a planar image on a wall at one side, and by adjusting the first angle, the height of the planar image on the wall can be changed, so that the projected planar image is suitable for viewing of people with different heights.

Illustratively, the first angle is 30 ° to 60 °. Taking the example that the first angle is 45 °, the projection light ray 310 reflected by the reflecting mirror 510 is perpendicular (or approximately perpendicular) to the optical axis of the projection lens 410, when the position of the projector 400 is properly installed, the projected plane image may be just located in the middle of the wall, at this time, the first angle is increased, so that the first angle is adjusted towards 60 °, the position of the plane image on the wall may be lowered, the first angle is reduced, so that the first angle is adjusted towards 30 °, and the position of the plane image on the wall may be raised. The first angle may be any other suitable value besides the above-mentioned angle values, and is not limited thereto.

In one embodiment of the present application, as shown in fig. 4, the combined lens further includes a fisheye lens set 520, the fisheye lens set 520 is disposed on one side of the projection lens 410, and the reflecting mirror 510 is movably disposed between the projection lens 410 and the fisheye lens set 520.

The fish eye lens group is designed and proposed by simulating goldfish eyes in bionics, and is a lens set formed by a plurality of groups of glass lenses, and the phase of light is changed by the up-down inconformity of the thickness of the glass lenses, so that scattered light is refocused, and the optical path difference of the light emitted by each point is consistent. The combination of the glass lenses enables the fisheye lens group to have a projection mode different from that of a single glass lens, and aberration can be well eliminated, so that an ultra-large visual angle can be obtained, the visual angle is generally over 120 degrees, and the maximum visual angle can be close to 180 degrees.

In the second projection mode, the reflecting mirror 510 is deviated from the outgoing light path of the projection lens 410, and the projection light emitted from the projection lens 410 is outgoing through the fisheye lens set 520. Specifically, the position of the mirror 510 may be adjusted in the manner described above to deflect the mirror 510 from the exit optical path of the projection lens 410. At this time, as shown in fig. 6, the projector 400 is in the second projection mode, since the reflection mirror 510 does not exist between the projection lens 410 and the fisheye lens group 520 to block the light, the projection light projected by the projection lens 410 can directly enter the fisheye lens group 520, and after exiting through the fisheye lens group 520, the projection light 320 forms a stereoscopic image in the second direction, thereby realizing the stereoscopic display effect.

It should be noted that the projection light 320 emitted through the fisheye lens set 520 can be used as illumination besides stereoscopic projection. For example, the projector 400 is mounted on a ceiling, and in the second projection mode, the projection light rays projected by the projection lens 410 are emitted through the fisheye lens set 520 to form a stereoscopic image in a room, and the projection light rays 320 emitted through the fisheye lens set 520 can be used as illumination at the same time because the projection light rays are projected from top to bottom.

In one example, the optical axis of the fisheye lens set 520 coincides with or is parallel to the optical axis of the projection lens 410. Taking the optical axis of the fisheye lens group 520 and the optical axis of the projection lens 410 as an example, when no other component for blocking light exists between the fisheye lens group 520 and the projection lens 410, in the second projection mode, the projection light emitted from the projection lens 410 is parallel to the optical axis of the fisheye lens group 520 and enters the fisheye lens group 520, and then the projection light is diffused by the fisheye lens group 520 and then emitted, and the emitted projection light can be used as illumination or for stereoscopic image display.

Based on the above description, according to the combination lens of the embodiment of the present invention, by changing the position of the reflecting mirror, the projector can realize two projection modes; in a first projection mode, projection light rays emitted by a projection lens are reflected by a reflecting mirror, and the reflected projection light rays form a plane picture in one direction; in the second projection mode, the projection light rays emitted by the projection lens are emitted through the fisheye lens group, and the projection light rays form a stereoscopic picture in the other direction, so that the picture can be projected in at least two directions through a single projector, and planar display and stereoscopic display are realized.

Moreover, based on the combined lens, the single projector is utilized to realize the planar display and the three-dimensional display, so that the cost and the energy consumption can be obviously reduced, the number of the projectors is reduced, the heat accumulation in the sealed space can be reduced, the heat dissipation efficiency is improved, and meanwhile, the noise of the sealed space can be reduced.

In addition, based on the combined lens, in the second projection mode, the projection light emitted by the fish-eye lens group can also realize the illumination effect, so that the projector can realize the projection effect and the illumination effect.

The application also provides a projection device. The projection apparatus of the present application will be explained and described with reference to fig. 7 to 14. FIG. 7 is a schematic diagram of a projection apparatus according to an embodiment of the present application; FIG. 8 shows an exploded view of a projection device according to an embodiment of the application; FIG. 9 shows a schematic view of a projection device according to an embodiment of the application in a first projection mode; FIG. 10 shows a schematic view of a projection device in a second projection mode according to an embodiment of the application; FIG. 11 shows a schematic view of a projection device according to an embodiment of the application in a first projection mode; FIG. 12 is a schematic view of a projection apparatus according to an embodiment of the present application in a second projection mode; FIG. 13 shows a schematic view of a projection apparatus according to an embodiment of the application in a first projection mode; fig. 14 shows a schematic view of a projection device according to an embodiment of the application in a second projection mode. The technical features of the various embodiments of the present application may be combined with each other without conflict.

In one embodiment of the present application, as shown in fig. 7, the projection apparatus 700 includes a lens assembly, where the lens assembly may be the lens assembly described above, and the description of the lens assembly and its internal components may refer to the description of the lens assembly above, which is not repeated herein.

In one embodiment of the present application, as shown in fig. 7, the projection apparatus 700 further includes a projector 400, where the projector 400 has a projection lens 410, the projection lens 410 is used for projecting the projection light, and the combined lens is disposed on a side of the projection lens 410 from which the projection light is projected.

The projector 400 may be a Digital Light Processing (DLP) projector, an LCoS (liquid crystal on silicon) projector, a Liquid CRYSTAL DISPLAY (LCD) projector, a 3LCD projector, or the like. For convenience of description, a DLP projector is taken as an example for the following description.

In one example, the mirror 510 is configured to be switchable between an outgoing light path at the projection lens 410 and an outgoing light path offset from the projection lens 410, such that the projection device 700 switches between a first projection mode, in which the picture reflected by the mirror 510 is a planar picture, and a second projection mode, in which the picture projected by the fisheye lens set 520 is a stereoscopic picture. Specifically, a driver may be disposed in the projection apparatus 700, and when the driver drives the mirror 510 to move toward the outgoing light path of the projection lens 410, the projection apparatus 700 is switched from the second projection mode to the first projection mode; when the driver drives the mirror 510 to deviate from the outgoing light path of the projection lens 410, the projection device 700 is switched from the first projection mode to the second projection mode.

In one example, in the first projection mode, the center of the projected screen is more than a threshold distance from the optical axis of the projection lens 410. Specifically, in the process of reflecting the projection light beam projected from the projection lens 410 by the reflecting mirror 510 to form a planar screen, the projection light beam may be emitted centering on the optical axis of the projection lens 410 or may be emitted deviating from the optical axis of the projection lens 410. In the latter case, the center of the projection screen may be caused to be spaced from the optical axis of the projection lens 410 by more than a threshold distance. Illustratively, the threshold distance is 1/4 of the height of the projected picture, i.e. the distance of the center of the projected picture from the optical axis of the projection lens divided by the half height of the projected picture is greater than 50%. Alternatively, the threshold distance may be another value, which is not limited.

In one example, as shown in fig. 8, the projector 400 further includes a light source assembly 420 and a light engine assembly 430, and the light engine assembly 430 is located between the light source assembly 420 and the projection lens 410. The light source assembly 420 provides light to the optical-mechanical assembly 430, and the optical-mechanical assembly 430 projects projection light from the projection lens 410 to the outside under the action of the light. The light source assembly 420 may be selected from a conventional bulb light source, an LED light source, a laser light source, and the like, and the comparison is not limited.

In one example, the projection device 700 further includes a driver for driving the projection lens to move such that the center of the light source assembly 420 is deviated from the optical axis of the projection lens 410 in the first projection mode to adjust the projection position of the projection light reflected by the reflecting mirror 510. Specifically, in addition to changing the position of the projection screen by adjusting the first angle between the reflecting surface of the reflecting mirror 510 and the optical axis of the projection lens 410 as described above, the position of the projection screen may be changed by adjusting the position of the light source assembly 420. When the center of the light source assembly 420 and the optical axis of the projection lens 410 are in the same straight line, the light emitted by the light source assembly 420 uniformly exits from the projection lens 410 with the optical axis of the projection lens 410 as the center; when the center of the light source assembly 420 is deviated from the optical axis of the projection lens 410, the light emitted from the light source assembly 420 is not centered on the optical axis of the projection lens 410, and the projection light emitted from the projection lens 410 is deflected, thereby changing the projection position of the projection light.

In one example, the projection device 700 further includes a controller that may be used to control the individual drivers to perform their respective drive functions. In some embodiments, to facilitate the adjustment of the projection mode by the user, the projection device 700 may be further provided with a mode switching key, through which the user may implement the switching of the projection mode, where the switching key may be a physical key or a hot key provided on a user interaction interface of the projection device, and the user may trigger the switching of the projection mode by clicking or touching the key.

In one example, as shown in fig. 8, the opto-mechanical assembly 430 includes a display chip 431, and the size of the display chip 431 is 0.23 inch to 0.47 inch. In general, the size of a display chip is related to resolution, and the larger the size of the display chip, the larger the number of micro-lenses thereof, the better the imaging effect thereof, and the higher the resolution. Illustratively, the 480P resolution corresponds to when the display chip is 0.23 inches in size, the 720P resolution corresponds to when the display chip is 0.33 inches in size, and the 1080P resolution corresponds to when the display chip is 0.47 inches in size. Of course, a larger size display chip may be selected to further improve resolution.

In one example, the distance between the projection lens 410 and the fisheye lens set 520 is positively correlated with the size of the display chip 431. Specifically, the larger the size of the display chip 431, the larger the distance between the projection lens 410 and the fisheye lens set 520 should be accordingly.

In one example, the distance between the projection lens 410 and the fisheye lens set 520 is positively correlated with the projection ratio of the projection lens 410. The projection ratio is the ratio of the projection distance to the screen width, projection ratio=projection distance/screen width. The smaller the value of the projection ratio, the larger the width of the projected screen, which means the same projection distance. In the present application, the larger the projection ratio of the projection lens 410, the larger the distance between the projection lens 410 and the fisheye lens set 520 should be. Illustratively, the projection ratio may be selected to be 0.8:1, 1.2:1, 1.4:1, etc. Hereinafter, an example of the projection ratio of 1.2:1 will be described.

In one example, the dimension of the reflecting surface of the mirror in the longitudinal direction is D, D satisfying the following condition:

D≥d/cosα

And in the first projection mode, a first angle is formed between the reflecting surface of the reflecting mirror and the optical axis of the projection lens, alpha is the first angle, and d is the distance between the projection lens and the fisheye lens set. In some embodiments, the dimension of the transverse direction perpendicular to the longitudinal direction in the reflecting surface may also satisfy the above condition, or the dimension of the transverse direction may also be set appropriately according to the projection ratio. It should be noted that the longitudinal direction refers to a direction located in the reflecting surface and forming a first angle with the optical axis of the projection lens.

Specifically, the size of the reflecting mirror and the distance between the projection lens and the fisheye lens group can be reasonably selected according to actual needs, for example, when the center of a picture overlaps with the center of the optical axis of the projection lens, the size of the reflecting mirror can be minimized, and the distance between the projection lens and the fisheye lens group can also be minimized.

In the following, a case where the mirror is circular and the reflecting surface is circular is mainly taken as an example, the longitudinal dimension is a diameter when circular, but in some embodiments, the shape of the mirror or the reflecting surface may be other shapes, such as rectangular, elliptical, polygonal, or other irregular shapes.

For example, taking the display chip 431 having a size of 0.23 inch and the distance between the projection lens and the fisheye lens set being not smaller than 24mm as an example, the diameter of the reflecting mirror (i.e., the diameter of the reflecting surface) is D, and the first angle is α, D is not smaller than 24/cos α. Specifically, for example, when the first angle is 30 °, the diameter of the reflecting mirror is not smaller thanWhen the first angle is 45 °, the diameter of the mirror 510 is not smaller than/>When the first angle is 60 degrees, the diameter of the reflecting mirror is not smaller than 48mm.

As shown in fig. 9, in the first projection mode, the center of the projection image is offset from the optical axis of the projection lens, and the distance between the center of the projection image and the optical axis of the projection lens divided by the half height of the projection image is greater than 50%, the reflector is disposed between the projection lens and the fisheye lens set at 45 ° and extends in the direction of offset from the projection lens to the projection image, at this time, the distance between the fisheye lens set and the projection lens is not less than 24mm, and the size of the hypotenuse direction when the reflector is disposed at 45 ° is not less than(35 Mm is taken as an example in the figure).

As shown in fig. 10, in the second projection mode, the projection device activates the fisheye lens group, and manually or automatically adjusts the center of the projection image to move toward and coincide with the optical axis of the projection lens group, and coincides with the optical axis of the fisheye lens group, and at this time, the reflecting mirror between the projection lens and the fisheye lens group moves in the same direction along the image modulation direction and leaves the projection image, so that the distance between the projection lens and the fisheye lens group remains unchanged.

For another example, the display chip has a size of 0.33 inches, the distance between the lens and the fisheye lens set is not smaller than 32mm, the diameter of the mirror is D, and the first angle is alpha, then D is not smaller than 32/cos alpha. Specifically, for example, when the first angle is 30 °, the diameter of the reflecting mirror is not smaller thanWhen the first angle is 45 DEG, the diameter of the reflecting mirror is not less than/>When the first angle is 60 degrees, the diameter of the reflecting mirror is not smaller than 64mm.

As shown in fig. 11, in the first projection mode, the center of the projection image is offset from the optical axis of the projection lens, and the distance between the center of the projection image and the optical axis of the projection lens divided by the half height of the projection image is greater than 50%, the reflector is disposed between the projection lens and the fisheye lens set at 45 ° and extends in a direction offset from the projection lens to the projection image, at this time, the distance between the fisheye lens set and the projection lens is not less than 32mm, and the size of the hypotenuse direction when the reflector is disposed at 45 ° is not less than(45 Mm is taken as an example in the figure).

As shown in fig. 12, in the second projection mode, the projection device activates the fisheye lens group, and manually or automatically adjusts the center of the projection image to move toward and coincide with the optical axis of the projection lens group, and coincides with the optical axis of the fisheye lens group, and at this time, the reflecting mirror between the projection lens and the fisheye lens group moves in the same direction along the image modulation direction and leaves the projection image, so that the distance between the projection lens and the fisheye lens group remains unchanged.

For another example, the display chip has a size of 0.47 inch, the distance between the lens and the fisheye lens set is not smaller than 42mm, the diameter of the reflecting mirror is D, and the first angle is alpha, D is not smaller than 42/cos alpha. Specifically, for example, when the first angle is 30 °, the diameter of the reflecting mirror is not smaller thanWhen the first angle is 45 DEG, the diameter of the reflecting mirror is not less than/>When the first angle is 60 degrees, the diameter of the reflecting mirror is not smaller than 84mm.

As shown in fig. 13, in the first projection mode, the center of the projection screen is offset from the optical axis of the projection lens, and the distance between the center of the projection screen and the optical axis of the projection lens divided by the half height of the projection screen is greater than 50%, the reflector is located between the projection lens and the fisheye lens set, is disposed at 45 ° and extends in the direction of offset from the projection lens to the projection screen, at this time, the distance between the fisheye lens set and the projection lens is not less than 42mm, and the size of the hypotenuse direction when the reflector is disposed at 45 ° is not small(60 Mm is taken as an example in the figure).

As shown in fig. 14, in the second projection mode, the projection device activates the fisheye lens group, and manually or automatically adjusts the center of the projection image to move toward and coincide with the optical axis of the projection lens group, and coincides with the optical axis of the fisheye lens group, and at this time, the reflecting mirror between the projection lens and the fisheye lens group moves in the same direction along the image modulation direction and leaves the projection image, so that the distance between the projection lens and the fisheye lens group remains unchanged.

In summary, according to the combined lens and the projection device provided by the embodiment of the application, the position of the reflecting mirror is changed, so that the projector can realize two projection modes; in a first projection mode, projection light rays emitted by a projection lens are reflected by a reflecting mirror, and the reflected projection light rays form a plane picture in one direction; in the second projection mode, the projection light rays emitted by the projection lens are emitted through the fisheye lens group, and the projection light rays form a stereoscopic picture in the other direction, so that the picture can be projected in at least two directions through a single projector, and planar display and stereoscopic display are realized.

Moreover, based on the combined lens and the projection device, the single projector is utilized to realize plane display and three-dimensional display, so that the cost and the energy consumption can be obviously reduced, the quantity of the projectors can be reduced, the heat accumulation in a sealed space can be reduced, the heat dissipation efficiency can be improved, and meanwhile, the noise of the sealed space can be reduced.

In addition, based on the combined lens and the projection device, in the second projection mode, the projection light emitted by the fish-eye lens group can also realize the illumination effect, so that the projector can realize the projection effect and the illumination effect.

Although the illustrative embodiments have been described herein with reference to the accompanying drawings, it is to be understood that the above illustrative embodiments are merely illustrative and are not intended to limit the scope of the present application thereto. Various changes and modifications may be made therein by one of ordinary skill in the art without departing from the scope and spirit of the application. All such changes and modifications are intended to be included within the scope of the present application as set forth in the appended claims.

Similarly, it should be appreciated that in order to streamline the application and aid in understanding one or more of the various application aspects, various features of the application are sometimes grouped together in a single embodiment, figure, or description thereof in the description of exemplary embodiments of the application. However, the method of the present application should not be construed as reflecting the following intent: i.e., the claimed application requires more features than are expressly recited in each claim. Rather, as the following claims reflect, inventive subject matter lies in less than all features of a single disclosed embodiment. Thus, the claims following the detailed description are hereby expressly incorporated into this detailed description, with each claim standing on its own as a separate embodiment of this application.

Furthermore, those skilled in the art will appreciate that while some embodiments described herein include some features but not others included in other embodiments, combinations of features of different embodiments are meant to be within the scope of the application and form different embodiments. For example, in the claims, any of the claimed embodiments may be used in any combination.

It should be noted that the above-mentioned embodiments illustrate rather than limit the application, and that those skilled in the art will be able to design alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The use of the words first, second, third, etc. do not denote any order. These words may be interpreted as names.

Claims (15)

1. A combination lens for a projector having a projection lens for projecting projection light, the combination lens comprising:

The fish-eye lens group is arranged on one side of the projection lens;

the reflecting mirror is movably arranged between the projection lens and the fisheye lens group;

In the first projection mode, the reflecting mirror is positioned on an emergent light path of the projection lens and is used for reflecting projection light rays emitted by the projection lens; in the second projection mode, the reflecting mirror deviates from an emergent light path of the projection lens, and projection light rays emitted by the projection lens are emergent through the fisheye lens group.

2. The combination lens of claim 1, wherein in the first projection mode, a reflective surface of the mirror is at a first angle to an optical axis of the projection lens.

3. The combination lens of claim 2, wherein the first angle is 30 ° to 60 °.

4. The combination lens of claim 1, wherein an optical axis of the fisheye lens set coincides with or is parallel to an optical axis of the projection lens.

5. A projection apparatus, comprising:

a projector having a projection lens for projecting projection light;

the combination lens according to any one of claims 1 to 4, wherein the combination lens is disposed on a side of the projection lens from which the projection light is projected.

6. The projection device of claim 5, wherein the mirror is configured to be switchable between an outgoing light path at the projection lens and an outgoing light path offset from the projection lens such that the projection device switches between a first projection mode in which the picture reflected by the mirror is a planar picture and a second projection mode in which the picture projected by the fisheye lens is a stereoscopic picture.

7. The projection device of claim 5, wherein the projector further comprises a light source assembly, a light mechanism assembly and a driver, wherein the light mechanism assembly is positioned between the light source assembly and the projection lens, and in a first projection mode, the driver is used for driving the projection lens to move so that the center of the light source assembly is deviated from the optical axis of the projection lens to adjust the projection position of the projection light reflected by the reflector.

8. The projection device of claim 5, wherein the opto-mechanical assembly includes a display chip, and wherein a distance between the projection lens and the fisheye lens set is positively correlated with a size of the display chip.

9. The projection device of claim 8, wherein the display chip has a size of 0.23 inches to 0.47 inches.

10. The projection device of claim 9, wherein a distance between the projection lens and the fisheye lens set is not less than 24mm when the display chip is 0.23 inches in size.

11. The projection device of claim 9, wherein a distance between the projection lens and the fisheye lens set is not less than 32mm when the display chip is 0.33 inches in size.

12. The projection device of claim 9, wherein a distance between the projection lens and the fisheye lens set is not less than 42mm when the display chip is 0.47 inches in size.

13. The projection device of claim 5, wherein the reflecting surface of the mirror has a dimension D in the longitudinal direction, D satisfying the following condition:

D≥d/cosα

In the first projection mode, a first angle is formed between the reflecting surface of the reflecting mirror and the optical axis of the projection lens, alpha is the first angle, and d is the distance between the projection lens and the fisheye lens set.

14. The projection device of claim 5, wherein a distance between the projection lens and the fisheye lens set is positively correlated with a throw ratio of the projection lens.

15. The projection apparatus according to any one of claims 5 to 14, wherein the projection ratio of the projection lens is 1.2:1.