CN113835282B - Projection system - Google Patents

Projection system Download PDF

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Publication number
CN113835282B
CN113835282B CN202111007954.1A CN202111007954A CN113835282B CN 113835282 B CN113835282 B CN 113835282B CN 202111007954 A CN202111007954 A CN 202111007954A CN 113835282 B CN113835282 B CN 113835282B
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China
Prior art keywords
lens group
reflecting mirror
projection
emitted
optical axis
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CN202111007954.1A
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Chinese (zh)
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CN113835282A (en
Inventor
赵云
王帅
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Goertek Optical Technology Co Ltd
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Goertek Optical Technology Co Ltd
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Priority to CN202111007954.1A priority Critical patent/CN113835282B/en
Publication of CN113835282A publication Critical patent/CN113835282A/en
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    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/142—Adjusting of projection optics
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/20—Lamp housings
    • G03B21/2066—Reflectors in illumination beam
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
    • Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Transforming Electric Information Into Light Information (AREA)
  • Projection Apparatus (AREA)

Abstract

The invention discloses a projection system, comprising: the device comprises an illumination system, a first lens group, a second lens group, a reflecting mirror and a rotary driving piece, wherein the illumination system is used for emitting projection light beams; the first lens group is arranged at the emergent end of the lighting system; the second lens group is arranged at the emergent end of the lighting system, and the optical axis of the second lens group is crossed with the optical axis of the first lens group; the reflecting mirror is perpendicular to the optical axis of the first lens group and the optical axis of the second lens group and extends along the symmetry axis of the optical axis of the first lens group and the optical axis of the second lens group; the rotary driving piece is connected with the reflecting mirror and is used for driving the reflecting mirror to rotate on the plane where the reflecting mirror is located so that the projection light beam is emitted through the first lens group or is emitted through the second lens group after being reflected by the reflecting mirror. The technical scheme of the invention can realize the dual functions of wall surface projection or desktop projection, and can meet different use requirements of users.

Description

Projection system
Technical Field
The present disclosure relates to the field of projection devices, and more particularly, to a projection system.
Background
With the development of the technology of the micro projector, the home projector is increasingly coming into the field of view of people, and is moving toward miniaturization and portability. At present, the application of the household projector mainly comprises two aspects of video entertainment and education and teaching. The projector for video entertainment generally adopts a wall surface projection mode and needs to have a larger projection ratio; the projector for education and teaching generally adopts a desktop projection mode, and a 20 cm picture is projected on the desktop at a height of about 40 cm, and the required projection is relatively small.
For a projector, for example, a projector for video entertainment uses a tele lens set, which has only a wall projection function, and a projector for education and teaching uses a short-focus lens set, which has only a desktop projection function, and because the focal length of the lens set is generally fixed, the projector function is single and fixed. However, with the increase of the demands of users, the users need to use the video entertainment function of the projector under certain conditions, and use the education and teaching functions of the projector under other conditions, so that the users can only purchase two projectors with different functions at the same time, the space is occupied, the resources are wasted, and the use is inconvenient. Therefore, it is increasingly difficult for a single-function projector to meet the needs of modern users.
Disclosure of Invention
The invention mainly aims to provide a projection system, which aims to enable projection beams to be emitted through a first lens group or to be emitted through a second lens group through rotating the position of a reflecting mirror, realize the dual functions of wall surface projection or desktop projection and meet different use requirements of users.
To achieve the above object, the present invention provides a projection system, comprising:
an illumination system for emitting a projection beam;
the first lens group is arranged at the emergent end of the lighting system;
the second lens group is arranged at the emergent end of the lighting system, and the optical axis of the second lens group is crossed with the optical axis of the first lens group;
the reflecting mirror is perpendicular to the optical axis of the first lens group and the optical axis of the second lens group and extends along the symmetry axis of the optical axis of the first lens group and the optical axis of the second lens group;
the rotary driving piece is connected with the reflecting mirror and is used for driving the reflecting mirror to rotate on the plane where the reflecting mirror is located, so that the projection light beam is emitted through the first lens group or is emitted through the second lens group after being reflected by the reflecting mirror.
Optionally, the projection system further comprises:
a support;
the sensing assembly is arranged on the supporting piece and is used for sensing the rotating position of the reflecting mirror.
Optionally, a transmission window is formed on the reflecting mirror;
when the reflecting mirror rotates to different positions, the projection light beam passes through the transmission window and is emitted through the first lens group or is reflected by the reflecting mirror and then is emitted through the second lens group.
Optionally, the support is a first bracket;
the induction assembly comprises a first inductor and a second inductor, the first inductor and the second inductor are arranged on the first bracket side by side, and the edge of the reflecting mirror is positioned in the induction range of the first inductor and the second inductor;
the edge of the reflector is provided with a first sensing port and a second sensing port, and when the projection light beam is emitted through the first lens group, the first sensing port is aligned to the first sensor; when the projection beam is emitted through the second lens group, the second sensing port is aligned to the second sensor.
Optionally, a third induction port is further formed in the edge of the reflecting mirror, and the third induction port and the second induction port are arranged side by side;
when the projection beam is emitted through the second lens group, the third sensing port is aligned to the first sensor.
Optionally, a first clamping groove corresponding to the reflector is formed in the first bracket, and the edge of the reflector is accommodated in the first clamping groove.
Optionally, when the reflecting mirror rotates to different positions, the projection beam passes through the space on one side of the reflecting mirror and is emitted through the first lens group or is reflected by the reflecting mirror and then is emitted through the second lens group.
Optionally, the support is a second bracket;
the induction assembly comprises a third inductor and a fourth inductor, and the third inductor and the fourth inductor are arranged on the second bracket;
when the projection beam is emitted through the first lens group, one side edge of the reflecting mirror is positioned in the induction range of the third sensor; when the projection beam is emitted through the second lens group, the edge of the other side of the reflecting mirror is positioned in the sensing range of the fourth sensor.
Optionally, a second clamping groove is formed in the second bracket, and a clamping piece is correspondingly arranged on the edge, close to the second bracket, of the reflecting mirror;
when the projection beam is emitted through the second lens group, the clamping piece is clamped in the second clamping groove.
Optionally, the reflecting mirror includes a glass layer and a reflecting film attached to a surface of the glass layer, and the reflecting film is located on a surface of the glass layer facing the second lens group.
In the technical scheme of the invention, the reflecting mirror and the rotary driving piece are arranged between the lighting system and the first lens group/the second lens group, the reflecting mirror is perpendicular to the optical axis of the first lens group and the optical axis of the second lens group and extends along the symmetrical axis of the optical axis of the first lens group and the optical axis of the second lens group, the rotary driving piece drives the reflecting mirror to rotate to different positions on the plane where the reflecting mirror is positioned, and the projection light beam can be selectively emitted through the first lens or emitted through the second lens group after being reflected by the reflecting mirror, so that the effect of wall projection or desktop projection is switched, thereby realizing the dual functions of wall projection or desktop projection on the same projection system, meeting the use requirements of users on video entertainment and education teaching.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a projection system according to an embodiment of the present invention;
FIG. 2 is a schematic view of the projection system of FIG. 1 with the mirror in a first position;
FIG. 3 is a schematic view of the projection system of FIG. 1 with the mirror in a second position;
FIG. 4 is a schematic view of a first bracket of the projection system of FIG. 1;
FIG. 5 is a schematic diagram of the structure of a mirror of the projection system of FIG. 1;
FIG. 6 is a schematic diagram of another embodiment of a projection system according to the present invention;
FIG. 7 is a schematic view of the projection system of FIG. 6 with the mirror in a first position;
FIG. 8 is a schematic view of the projection system of FIG. 6 with the mirror in a second position;
FIG. 9 is a schematic view of the structure of FIG. 8 from another perspective;
FIG. 10 is a schematic diagram of the structure of a mirror of the projection system of FIG. 6.
Reference numerals illustrate:
reference numerals Name of the name Reference numerals Name of the name
100 Projection system 453 Chamfering tool
10 Lighting system 50 Rotary driving piece
20 First lens group 60 Induction chip
30 Second lens group 61 First support
40 Reflecting mirror 62 First clamping groove
41 Transparent window 63 First inductor
42 First induction port 64 Second inductor
43 Second induction port 65 Second support
44 Third induction port 66 Positioning seat
45 Clamping piece 67 Second clamping groove
451 Connecting column 68 Third inductor
452 Clamping connector 69 Fourth inductor
The achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that, if directional indications (such as up, down, left, right, front, and rear … …) are included in the embodiments of the present invention, the directional indications are merely used to explain the relative positional relationship, movement conditions, etc. between the components in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are correspondingly changed.
In addition, if there is a description of "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is 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 addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present invention.
The present invention proposes a projection system 100.
In an embodiment of the present invention, as shown in fig. 1 and 6, the projection system 100 includes: an illumination system 10, a first lens group 20, a second lens group 30, a mirror 40, and a rotation driver 50, the illumination system 10 being configured to emit a projection beam; the first lens group 20 is arranged at the emergent end of the lighting system 10; the second lens group 30 is arranged at the emergent end of the lighting system 10, and the optical axis of the second lens group 30 is crossed with the optical axis of the first lens group 20; the reflecting mirror 40 is perpendicular to the optical axis of the first lens group 20 and the optical axis of the second lens group 30, and extends along the symmetry axis of the optical axis of the first lens group 20 and the optical axis of the second lens group 30; the rotation driving element 50 is connected to the reflecting mirror 40, and is used for driving the reflecting mirror 40 to rotate on the plane of the reflecting mirror 40, so that the projection beam is emitted through the first lens group 20 or reflected by the reflecting mirror 40 and then emitted through the second lens group 30.
Specifically, the focal length of the first lens group 20 may be between 25 mm and 30 mm, and the focal length of the second lens group 30 may be between 3.2 mm and 3.5 mm, that is, the first lens group 20 is a tele lens group, and the second lens group 30 is a short-focus lens group. At this time, if the focal length of the first lens group 20 is different from the focal length of the second lens group 30, the projection ratio of the first lens group 20 and the second lens group 30 for imaging the projection beam is also different, so that different projection effects can be achieved. Of course, the first lens group 20 may be a short focal lens group and the second lens group 30 may be a long focal lens group, which is not limited in the present invention, and the focal lengths of the first lens group 20 and the second lens group 30 may be set according to actual needs. For convenience of description, the following will be exemplified by taking the first lens group 20 as a telephoto lens group and the second lens group 30 as a short-focus lens group. The specific structures of the illumination system 10, the first lens group 20 and the second lens group 30 may be in the prior art, and will not be described herein.
It will be readily appreciated that the mirror 40 may reflect the projection beam emitted by the illumination system 10, thereby changing the direction of propagation of the projection beam. At the same time, the reflecting mirror 40 can rotate relative to the illumination system 10 to determine whether to reflect the projection beam, so as to select the projection beam to be emitted through the first lens group 20 or to be emitted through the second lens group 30. Wherein, because the focal length of the first lens group 20 is longer, when the projection beam is emitted through the first lens group 20, the projection ratio of the optical imaging is larger, and at this time, the optical imaging can be projected on the wall surface for video and audio entertainment; the focal length of the second lens group 30 is shorter, and when the projection beam is emitted through the second lens group 30, the projection of the optical imaging is smaller, and at this time, the optical imaging can be projected on the desktop for education and teaching.
In this embodiment, the rotation of the mirror 40 is controlled by the rotation driving member 50. Specifically, the projection system 100 further includes a housing (not shown), in which the illumination system 10, the first lens group 20 and the second lens group 30 are all fixed, the first lens group 20 is located in an extending direction of an exit end of the illumination system 10, that is, an optical axis of a projection beam emitted by the illumination system 10 coincides with an optical axis of the first lens group 20, the rotary driving member 50 is also fixed in the housing, and an output end of the rotary driving member 50 is connected to the reflecting mirror 40. The rotary driving member 50 may be a motor, the shaft of which may be directly fixed to the reflecting mirror 40, or a sleeve may be provided on the reflecting mirror 40, and the reflecting mirror 40 is sleeved on the shaft of the motor through the sleeve.
The plane of the reflecting mirror 40 is perpendicular to the plane of the optical axis of the first lens group 20 and the optical axis of the second lens group 30, and the reflecting mirror 40 extends along the direction of the symmetry axis of the optical axis of the first lens group 20 and the optical axis of the second lens group 30, that is, the reflecting mirror 40 is inclined at a fixed angle to the first lens group 20 and the second lens group 30. In a specific embodiment, the optical axis of the first lens group 20 and the optical axis of the second lens group 30 are disposed at 90 ° intersections, and the reflecting mirror 40 is disposed at 45 ° angles to the optical axis of the first lens group 20 and the optical axis of the second lens group 30, respectively. Wherein, the motor shaft is vertically connected with the reflecting mirror 40, and when the motor drives the reflecting mirror 40 to rotate, the reflecting mirror 40 rotates along the plane where the motor is located, so that the reflecting mirror 40 is located at different positions on the same plane, including a first position and a second position: when the reflecting mirror 40 is at the first position, the reflecting mirror 40 is not blocked at the exit end of the illumination system 10, and the projection beam emitted by the illumination system 10 is directly emitted through the first lens group 20; when the reflecting mirror 40 is at the second position, the reflecting mirror 40 is blocked at the exit end of the illumination system 10, and the projection beam emitted by the illumination system 10 is reflected by the reflecting mirror 40 and then emitted through the second lens group 30.
Therefore, in the embodiment of the present invention, the rotation driving member 50 drives the reflecting mirror 40 to rotate to different positions on the same plane, so that the projection beam can be selectively emitted through the first lens or emitted through the second lens group 30, and finally the effect of switching wall projection or desktop projection is achieved, so that the dual functions of wall projection or desktop projection can be achieved on the same projection system 100, the use requirements of users on both video and audio entertainment and education and teaching can be met, and the first lens group 20 and the second lens group 30 share one set of illumination system 10, so that the overall volume of the projection system 100 can be effectively reduced, and the projection system 100 has a simple and compact structure and is flexible and convenient to use.
Specifically, referring to fig. 1 and 6, projection system 100 further includes: the support and the sensing assembly are arranged on the support and are used for sensing the rotating position of the reflecting mirror 40.
In this embodiment, the projection system 100 further includes a sensing chip 60, the sensing chip 60 is electrically connected with the sensing component, the sensing chip 60 is further electrically connected with the main control system of the projection system 100, and the sensing chip 60 is configured to receive the sensing signal of the sensing component, so as to obtain the rotation position and the movement state of the reflecting mirror 40 in real time. Meanwhile, the main control system is in control connection with the lighting system 10 and the rotary driving piece 50, and the sensing chip 60 sends acquired sensing information to the main control system, so that the main control system can accurately control the position of the reflecting mirror 40, and accordingly switching between wall projection and desktop projection functions can be achieved.
Specifically, the reflecting mirror 40 includes a glass layer and a reflecting film attached to a surface of the glass layer, and the reflecting film is located on a surface of the glass layer facing the second lens group 30.
In this embodiment, the main body of the reflecting mirror 40 is made of glass, and a layer of reflecting film is adhered to the surface of the main body, so that the light entering the reflecting mirror 40 can be reflected, and the effect of turning the light path is achieved. The reflective film can be a metal reflective film, and the metal reflective film has the advantages of simple preparation process and wide working wavelength range, and the metal reflective film has a larger extinction coefficient, the larger extinction coefficient is, the quicker light amplitude attenuation is, the less light energy enters the metal, and the higher reflectivity.
In an embodiment of the present invention, referring to fig. 1 to 3, a transmission window 41 is formed on the reflecting mirror 40; when the reflecting mirror 40 rotates to different positions, the projection beam passes through the transmission window 41 and is emitted through the first lens group 20 or reflected by the reflecting mirror 40 and then is emitted through the second lens group 30.
In this embodiment, the reflecting mirror 40 has a disc shape, and the output end of the rotation driving member 50 is connected to the center of the reflecting mirror 40, so that the reflecting mirror 40 uses its center of rotation as the center of rotation when the rotation driving member 50 drives the reflecting mirror 40 to rotate. Wherein, a transmission window 41 is formed in a region of the reflector 40 located at one side of the rotary driving member 50, and the shape and size of the transmission window 41 are matched with those of the projection beam, so that when the reflector 40 is driven to rotate to the first position by the rotary driving member 50 (as shown in fig. 2), the transmission window 41 on the reflector 40 is aligned with the projection beam, and the projection beam can directly penetrate through the transmission window 41 to be injected into the first lens group 20 and be injected from the first lens group 20, thereby realizing the wall projection function; when the mirror 40 is driven to rotate to the second position by the rotation driving member 50 (as shown in fig. 3), the other side area of the mirror 40 blocks the projection beam, the projection beam is reflected on the mirror 40, and after turning, the projection beam is incident into the second lens group 30 and is emitted from the second lens group 30, so as to realize the desk projection function.
Further, referring to fig. 4 to 5, the support member is a first bracket 61; the sensing assembly comprises a first sensor 63 and a second sensor 64, the first sensor 63 and the second sensor 64 are arranged on the first bracket 61 side by side, and the edge of the reflecting mirror 40 is positioned in the sensing range of the first sensor 63 and the second sensor 64; wherein, the edge of the reflecting mirror 40 is provided with a first sensing opening 42 and a second sensing opening 43, when the projection beam is emitted through the first lens group 20, the first sensing opening 42 is aligned to the first sensor 63; when the projection beam is emitted through the second lens assembly 30, the second sensing opening 43 is aligned with the second sensor 64.
In this embodiment, the sensing chip 60 may be mounted on the first bracket 61, and the first sensor 63 and the second sensor 64 may also be mounted on the first bracket 61, where the first sensor 63 and the second sensor 64 are electrically connected to the sensing chip 60 respectively. The working principle of the U-shaped inductor is that when no shielding object exists between the reflecting end and the receiving end, the infrared rays emitted by the transmitting end can be received by the receiving end, when shielding objects exist between the reflecting end and the receiving end, the infrared rays emitted by the transmitting end are shielded by the shielding objects, the receiving end cannot receive infrared signals, and the sensing chip 60 can sense corresponding sensing signals.
In order for the first and second sensors 63 and 64 to sense the first and second positions of the reflecting mirror 40, the first and second sensing ports 42 and 43 are located at opposite side edges of the reflecting mirror 40. Specifically, when the rotation driving member 50 drives the reflecting mirror 40 to rotate to the first position, the first sensing opening 42 at the edge of the reflecting mirror 40 is aligned with the first sensor 63, and the second sensing opening 43 is blocked by the edge of the reflecting mirror 40, at this time, the first sensor 63 outputs a corresponding sensing signal to the sensing chip 60, so as to know that the reflecting mirror 40 reaches the first position; when the rotary driving member 50 drives the mirror 40 to reversely rotate to the second position, the second sensing opening 43 at the edge of the mirror 40 is aligned with the second sensor 64, and the first sensing opening 42 is blocked by the edge of the mirror 40, at this time, the second sensor 64 outputs a corresponding sensing signal to the sensing chip 60, so as to know that the mirror 40 reaches the second position; when the rotation driving member 50 drives the reflecting mirror 40 to rotate, the first sensing opening 42 on the reflecting mirror 40 will not be aligned with the first sensor 63, and the second sensing opening 43 will not be aligned with the second sensor 64, i.e. the first sensor 63 and the second sensor 64 are simultaneously blocked by the edge of the reflecting mirror 40, and at this time, the sensing chip 60 can know that the reflecting mirror 40 is in a rotating motion state.
Further, referring to fig. 4 to 5, a third sensing opening 44 is further formed at an edge of the reflecting mirror 40, and the third sensing opening 44 and the second sensing opening 43 are arranged side by side; when the projection beam is emitted through the second lens assembly 30, the third sensing opening 44 is aligned with the first sensor 63.
In this embodiment, a third sensing port 44 is further formed on the mirror 40 at a position near the second sensing port 43, when the rotary driving member 50 drives the mirror 40 to rotate to the second position, the second sensing port 43 at the edge of the mirror 40 is aligned with the second sensor 64, and at the same time, the third sensing port 44 is aligned with the first sensor 63, and at this time, the first sensor 63 and the second sensor 64 simultaneously output corresponding sensing signals to the sensing chip 60, so as to know that the mirror 40 reaches the second position. By adding the third sensing port 44, the sensing chip 60 can judge the rotating position and the rotating state of the reflecting mirror 40 through the quantity of sensing signals of the two sensors, the identification is more accurate, the erroneous judgment can be prevented, the reflecting mirror 40 is guaranteed to rotate in place, and therefore the accurate switching of the wall throwing function and the desk throwing function is guaranteed.
Further, referring to fig. 1 to 4, a first clamping groove 62 corresponding to the reflector 40 is formed on the first bracket 61, and an edge of the reflector 40 is accommodated in the first clamping groove 62.
In this embodiment, the first bracket 61 is fixed in the housing of the projection system 100, the first bracket 61 extends along the plane where the reflector 40 is located and is located at one side of the reflector 40, the first clamping groove 62 is formed on the surface of the first bracket 61 facing the reflector 40, the width of the first clamping groove 62 is adapted to the thickness of the reflector 40, and a part of the edge of the reflector 40 corresponding to the first bracket 61 extends into the first clamping groove 62 (of course, the first bracket 61 may also be disposed around the reflector 40, and the first clamping groove 62 is an annular clamping groove in which all the edges of the reflector 40 are accommodated). Thus, when the mirror 40 is driven to rotate to different positions by the rotation driving member 50, a part of the edge of the mirror 40 is always located in the first clamping groove 62, so that the mirror 40 is guaranteed to rotate in the plane where the mirror itself is located, the relative angle between the mirror 40 and other components is kept unchanged, the mirror 40 is prevented from tilting in the rotation process, and the imaging quality of the projection beam after passing through the second lens group 30 can be guaranteed by strictly controlling the angle of the mirror 40 (the angle of the mirror 40 determines the condition that the projection beam is injected into the second lens group 30, and the imaging quality of the second lens group 30 is greatly affected).
In another embodiment of the present invention, referring to fig. 6 to 8, when the mirror 40 rotates to a different position, the projection beam passes through the space on one side of the mirror 40 and is emitted through the first lens group 20 or is reflected by the mirror 40 and then is emitted through the second lens group 30.
In this embodiment, the reflecting mirror 40 has a rectangular shape, and the output end of the rotation driving member 50 is connected to one corner end of the edge of the reflecting mirror 40. That is, when the rotation driving member 50 drives the mirror 40 to rotate, the mirror 40 rotates in the plane of itself with the angular end as the rotation center. Thus, when the mirror 40 is driven to rotate to the first position by the rotary driving member 50 (as shown in fig. 7), the mirror 40 is entirely located outside the projection beam, and the projection beam can directly enter the first lens group 20 and be emitted from the first lens group 20, so as to realize the wall projection function; when the mirror 40 is driven to rotate to the second position by the rotation driving member 50 (as shown in fig. 8), the mirror 40 entirely blocks the projection beam, the projection beam is reflected on the mirror 40, and after turning, the projection beam is incident into the second lens group 30 and is emitted from the second lens group 30, so as to realize the table projection function.
Further, referring to fig. 7 to 9, the support member is a second bracket 65; the induction assembly comprises a third inductor 68 and a fourth inductor 69, and the third inductor 68 and the fourth inductor 69 are arranged on the second bracket 65; when the projection beam is emitted through the first lens group 20, one side edge of the reflecting mirror 40 is located in the sensing range of the third sensor 68; when the projection beam is emitted through the second lens assembly 30, the other side edge of the reflecting mirror 40 is located within the sensing range of the fourth sensor 69.
In this embodiment, the sensing chip 60 may be mounted on the second bracket 65, and the third sensor 68 and the fourth sensor 69 may be mounted on the second bracket 65 side by side, where the third sensor 68 and the fourth sensor 69 are electrically connected to the sensing chip 60 respectively. The third sensor 68 and the fourth sensor 69 correspond to the edges of the adjacent sides of the rectangular mirror 40, respectively. Specifically, when the rotation driving member 50 drives the reflecting mirror 40 to rotate to the first position, one side edge of the reflecting mirror 40 enters the sensing range of the third sensor 68, and at this time, the third sensor 68 outputs a corresponding sensing signal to the sensing chip 60, so as to know that the reflecting mirror 40 reaches the first position; when the rotation driving member 50 drives the reflecting mirror 40 to rotate to the second position, the edge of the other side of the reflecting mirror 40 enters the sensing range of the fourth sensor 69, and at this time, the fourth sensor 69 outputs a corresponding sensing signal to the sensing chip 60, so as to know that the reflecting mirror 40 reaches the second position; when the rotation driving member 50 drives the mirror 40 to rotate, the edge of the mirror 40 does not enter the sensing range of the third sensor 68 or the sensing range of the fourth sensor 69, and the sensing chip 60 can know that the mirror 40 is in the rotation motion state.
Further, referring to fig. 6 to 8, a second clamping groove 67 is formed on the second bracket 65, and a clamping piece 45 is correspondingly formed on an edge of the reflector 40, which is close to the second bracket 65; when the projection beam is emitted through the second lens assembly 30, the clamping member 45 is clamped in the second clamping groove 67.
In this embodiment, the second support 65 is fixed in the housing of the projection system 100, the second support 65 extends along the plane where the mirror 40 is located and is located at one side of the mirror 40, the surface of the second support 65 facing the mirror 40 is convexly provided with a positioning seat 66, a second clamping groove 67 is formed on the surface of the positioning seat 66 facing the mirror 40, the edge of the mirror 40, which is close to the second support 65, is correspondingly provided with a clamping member 45, the clamping member 45 specifically includes a connection column 451 and a clamping head 452 (as shown in fig. 10), the clamping head 452 is connected with the mirror 40 through the connection column 451, and the size of the clamping head 452 is adapted to the size of the clamping groove, so that the clamping head 452 can be conveniently clamped with the clamping groove, and the clamping head 452 can be provided as a cylinder, and simultaneously, the upper edge and the lower edge thereof are provided with chamfer 453 structures. Thus, when the mirror 40 is driven to rotate to the first position by the rotation driving member 50, the clamping connector 452 on the mirror 40 is clamped into the second clamping groove 67 of the second bracket 65, so as to ensure that the mirror 40 rotates in the plane where the mirror itself is located, keep the relative angle between the mirror 40 and other components unchanged, prevent the mirror 40 from tilting during rotation, and ensure the imaging quality of the projection beam after passing through the second lens group 30 by strictly controlling the angle of the mirror 40 (the angle of the mirror 40 determines the condition that the projection beam is incident into the second lens group 30, and has a large influence on the imaging quality of the second lens group 30).
The foregoing description is only of the preferred embodiments of the present invention and is not intended to limit the scope of the invention, and all equivalent structural changes made by the description of the present invention and the accompanying drawings or direct/indirect application in other related technical fields are included in the scope of the invention.

Claims (7)

1. A projection system, comprising:
an illumination system for emitting a projection beam;
the first lens group is arranged at the emergent end of the lighting system;
the second lens group is arranged at the emergent end of the lighting system, and the optical axis of the second lens group is crossed with the optical axis of the first lens group;
the reflecting mirror is perpendicular to the optical axis of the first lens group and the optical axis of the second lens group and extends along the symmetry axis of the optical axis of the first lens group and the optical axis of the second lens group;
the rotary driving piece is connected with the reflecting mirror and is used for driving the reflecting mirror to rotate on the plane where the reflecting mirror is positioned so that the projection light beam is emitted through the first lens group or is emitted through the second lens group after being reflected by the reflecting mirror;
the projection system further comprises:
a support;
the sensing component is arranged on the supporting piece and is used for sensing the rotating position of the reflecting mirror;
when the reflecting mirror rotates to different positions, the projection light beam passes through the space at one side of the reflecting mirror and is emitted through the first lens group or is reflected by the reflecting mirror and then is emitted through the second lens group;
the support piece is a second bracket;
the induction assembly comprises a third inductor and a fourth inductor, and the third inductor and the fourth inductor are arranged on the second bracket;
when the projection beam is emitted through the first lens group, one side edge of the reflecting mirror is positioned in the induction range of the third sensor; when the projection beam is emitted through the second lens group, the edge of the other side of the reflecting mirror is positioned in the sensing range of the fourth sensor.
2. The projection system of claim 1, wherein the reflector is provided with a transmission window;
when the reflecting mirror rotates to different positions, the projection light beam passes through the transmission window and is emitted through the first lens group or is reflected by the reflecting mirror and then is emitted through the second lens group.
3. The projection system of claim 2, wherein the support is a first bracket;
the induction assembly comprises a first inductor and a second inductor, the first inductor and the second inductor are arranged on the first bracket side by side, and the edge of the reflecting mirror is positioned in the induction range of the first inductor and the second inductor;
the edge of the reflector is provided with a first sensing port and a second sensing port, and when the projection light beam is emitted through the first lens group, the first sensing port is aligned to the first sensor; when the projection beam is emitted through the second lens group, the second sensing port is aligned to the second sensor.
4. The projection system of claim 3, wherein the edge of the reflector is further provided with a third sensing port, the third sensing port being disposed side-by-side with the second sensing port;
when the projection beam is emitted through the second lens group, the third sensing port is aligned to the first sensor.
5. The projection system of claim 3, wherein the first bracket is provided with a first clamping groove corresponding to the reflector, and the edge of the reflector is accommodated in the first clamping groove.
6. The projection system of claim 1, wherein a second clamping groove is formed in the second bracket, and a clamping piece is correspondingly arranged at the edge of the reflector, which is close to the second bracket;
when the projection beam is emitted through the second lens group, the clamping piece is clamped in the second clamping groove.
7. The projection system of any one of claims 1 to 6, wherein the mirror comprises a glass layer and a reflective film attached to a surface of the glass layer, and the reflective film is located on a surface of the glass layer facing the second lens group.
CN202111007954.1A 2021-08-27 2021-08-27 Projection system Active CN113835282B (en)

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CN105785701B (en) * 2014-12-24 2018-08-10 联想(北京)有限公司 A kind of electronic equipment
CN110389485A (en) * 2018-04-20 2019-10-29 广景视睿科技（深圳）有限公司 A kind of bidirectional projection's regulating device and projector
CN211086899U (en) * 2019-12-31 2020-07-24 濮阳宏业环保技术研究院有限公司 Bidirectional projection device
CN111176066A (en) * 2020-02-28 2020-05-19 华域视觉科技(上海)有限公司 Projection position adjusting device, projection equipment and vehicle
CN111999975A (en) * 2020-09-07 2020-11-27 科珑诗菁生物科技(上海)有限公司 Camera and projection integrated machine

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