WO2019184553A1

WO2019184553A1 - Aperture and projector

Info

Publication number: WO2019184553A1
Application number: PCT/CN2019/070932
Authority: WO
Inventors: 杨伟樑; 郭吉庆; 张建军; 郭胜男
Original assignee: 广景视睿科技（深圳）有限公司
Priority date: 2018-03-27
Filing date: 2019-01-09
Publication date: 2019-10-03
Also published as: CN207924351U

Abstract

Disclosed are an aperture (100) and a projector. The aperture (100) comprises a base (10), a light-blocking sheet (20), and an adjustment device (30), wherein the base (10) is provided with a light passage hole (11) through which a light beam passes, the light-blocking sheet (20) is connected to the adjustment device (30), and the adjustment device (30) is used to control the forward and backward movement of the light-blocking sheet (20) so as to adjust the size of the overlapping area between the light-blocking sheet (20) and the light passage hole (11), thereby adjusting the light flux of the light passage hole (11). The movement position of the light-blocking sheet (20) is adjusted by rotating the adjustment device (30), so as to control the light flux of the beam. With the above method, unnecessary stray light can be effectively blocked and the relationship between projection brightness and contrast can be effectively coordinated.

Description

Aperture and projector

Technical field

Embodiments of the present application relate to the field of projection technology, and in particular, to an aperture and a projector.

Background technique

A projector is a device that can project an image or a video onto a screen. It is widely used in homes, schools, offices, and entertainment venues. The contrast of the projector is very important. The higher the contrast, the sharper the image, and the more layered. it is good. When the light and dark transition is faster in the moving image, the higher the contrast, the easier it is for the human eye to distinguish such a conversion process, thus giving us a realistic visual experience. However, projectors often have a relationship between brightness and contrast. When the projector has high brightness, it will be accompanied by more stray light, resulting in lower contrast.

In the process of implementing the present application, the inventor of the present application found that the prior art usually adds a light blocking plate at the aperture of the aperture to eliminate astigmatism and improve contrast, but the position of the light blocking sheet is not adjustable. When the film is fixed, the contrast and brightness of the projector are fixed and cannot be adjusted flexibly.

Application content

In order to solve the above technical problem and to address the deficiencies of the prior art, the embodiment of the present application provides an aperture and a projector, which can effectively coordinate the relationship between contrast and brightness by adjusting the position of the light blocking piece, and is simple and flexible, and simple in operation.

The technical problem to be solved by the present application is to provide an aperture, which comprises: a base, a light blocking sheet and an adjusting device;

a light passing hole is disposed on the base for the light beam to pass through;

The light blocking sheet is connected to the adjusting device,

The adjusting device is configured to control movement of the light blocking sheet to adjust a overlapping area of the light blocking sheet and the light passing hole, thereby adjusting a light passing amount of the light passing hole.

Optionally, the aperture further includes a protection board, the protection board is fixed to the base, and the light blocking sheet is located between the protection board and the base.

Optionally, the manner of connecting the protection board to the base comprises screwing or welding.

Optionally, a first strip-shaped limiting hole is disposed on the light blocking plate, and a finite column is disposed on the base, and the limiting post is inserted into the first strip-shaped limiting hole away from an end of the base. .

Optionally, the protection plate is provided with a second strip-shaped limiting hole, and the second strip-shaped limiting hole corresponds to the first strip-shaped limiting hole, and the limiting post is away from the base One end is inserted into the second strip-shaped limiting hole after passing through the first strip-shaped limiting hole.

Optionally, the base is further provided with a sliding track, and the light blocking plate further has a sliding block corresponding to the sliding track, the sliding block is located in the sliding track, and the sliding block can be along The sliding track slides.

Optionally, the adjusting device comprises a driving motor and a rotating rod; the driving motor is fixed to the base, a rotating shaft of the driving motor is fixed with the rotating rod, and the driving motor is used for driving the rotating rod to rotate A first connecting hole is disposed on the light blocking plate, and a connecting post is disposed on the rotating rod, and the connecting post is disposed in the first connecting hole.

Optionally, the adjusting device comprises a manual dial and a rotating lever; the manual dial is disposed on the base, and the manual dial is rotatable relative to the base, and one end of the manual dial The rotating lever is fixed, the manual dial is used to drive the rotating rod to rotate; the light blocking sheet is provided with a first connecting hole, the rotating rod is provided with a connecting post, and the connecting rod is disposed on the first Inside a connection hole.

In order to solve the above technical problem, another technical solution adopted by the embodiment of the present application is to provide a projector including the aperture, the projector further includes an illumination source and a projection lens, and the aperture is located at the illumination source and The middle of the projection lens.

Optionally, the light-blocking plane is disposed at a 45 degree angle with a central optical axis of the projection lens to block light.

The beneficial effects of the embodiments of the present application are: different from the prior art, the embodiment of the present application provides an aperture and a projector, the aperture includes a base, a light blocking plate and an adjusting device, wherein the base has a light beam for passing a light passing hole, the light blocking piece is movably connected to the adjusting device, and the adjusting device controls the back and forth movement of the light blocking piece by an automatic or manual manner, thereby adjusting the light blocking piece and the through hole The overlapping area of the light holes is to adjust the amount of light passing through the light passing holes. The aperture further includes a protection plate disposed between the protection plate and the base, and the protection plate is configured to prevent the light blocking piece from falling. When it is desired to obtain high brightness, the adjusting device is rotated clockwise, the overlapping area of the light blocking sheet and the light passing hole becomes small, and the light passing amount of the light passing hole becomes large; when high contrast is desired When the adjusting device is adjusted counterclockwise, the overlapping area of the light blocking sheet and the light passing hole becomes large, and the light passing amount of the light passing hole becomes small. The embodiment of the present application effectively adjusts the relationship between the projection brightness and the contrast by adjusting the moving position of the light blocking piece, and is simple and flexible, and the operation is simple.

DRAWINGS

1 is a schematic perspective view of a diaphragm of an embodiment of the present application;

2 is an exploded view of an aperture of an embodiment of the present application;

3 is a cross-sectional view of an aperture of an embodiment of the present application.

Please refer to FIG. 1 to FIG. 3, 100 is the aperture, 10 is the base, 11 is the light-passing hole, 12 is the sliding track, 13 is the limiting column, 20 is the light blocking piece, 21 is the first strip-shaped limiting hole, 22 The first connecting hole, 30 is an adjusting device, 31 is a driving motor, 32 is a rotating rod, 40 is a protective plate, 41 is a light exit hole, and 42 is a second strip-shaped limiting hole.

detailed description

In order to facilitate the understanding of the present application, the present application will be described in more detail below with reference to the accompanying drawings and specific embodiments. It is to be noted that when an element is described as being "fixed" to another element, it can be directly on the other element, or one or more central elements can be present. When an element is referred to as "connected" to another element, it can be a <RTI ID=0.0> </ RTI> </ RTI> <RTIgt; The terms "vertical," "horizontal," "left," "right," "inside," "outside," and the like, as used in this specification, are for the purpose of illustration.

Unless otherwise defined, all technical and scientific terms used in the specification are the same meaning The terms used in the description of the present application are for the purpose of describing the specific embodiments and are not intended to limit the application. The term "and/or" used in this specification includes any and all combinations of one or more of the associated listed items.

Referring to FIG. 1 to FIG. 3 , an embodiment of the present application provides an aperture 100 including a base 10 , a light blocking plate 20 , an adjusting device 30 , and a protection plate 40 .

The base 10 is provided with a light-passing hole 11 for the passage of a light beam, the light-passing hole 11 is circular, the number of the light-passing holes 11 is one, and the base 10 is further A sliding rail 12 is provided, the number of the sliding rails 12 is two, and the shape and size are uniform. The cross-sectional view of the sliding rail 12 is semi-circular, and the sliding rail 12 is used for the light blocking sheet 20 The sliding rail 12 is moved. The base 10 is further provided with a limiting post 13 . The limiting post 13 has a cylindrical shape, and the number of the limiting post 13 is one. The limiting post 13 is used to restrict the movement. The trajectory of the light-blocking sheet 20 is not limited in the embodiment of the present application, and the shape and number of the sliding rail 12 and the limiting post 13 are not limited.

The light blocking sheet 20 is disposed between the base 10 and the protection plate 40. The light blocking sheet 20 has a convex shape or other shape, such as a concave shape, and is generally arranged in an arc shape so as to block the The stray light at the edge of the light-passing hole 11 has a convex occlusion effect superior to that of the concave shape. The light blocking plate 20 is provided with a sliding block (not shown) corresponding to the sliding track 12 of the base 10. The number of the sliding blocks is two, the same shape and shape, and the sliding block is semicircular. Of course, the number and shape of the sliders can be additionally set according to the number and shape of the slide rails 12 of the base 10. The light blocking sheet 20 is further provided with a first strip-shaped limiting hole 21, the number of the first strip-shaped limiting holes 21 is two, and the length is different, and the first strip-shaped limiting hole 21 runs through. The light blocking sheet 20. Inserting the end of the limiting post 13 away from the base 10 into the longer first strip-shaped limiting hole 21, restricting the light-blocking sheet 20 from moving back and forth within the first strip-shaped limiting hole 21, The first strip-shaped limiting hole 21 and the sliding track 12 of the base 10 are parallel to each other.

The light blocking sheet 20 is further provided with a first connecting hole 22, the first connecting hole 22 is disposed at an end away from the convex surface of the light blocking sheet 20, and the first connecting hole 22 is oblong, the first The length of a connecting hole 22 is perpendicular to the length of the first strip limiting hole 21, and the first connecting hole 22 is a through hole, and the first connecting hole 22 is movably connected to the adjusting device 30.

The adjusting device 30 is an automatic adjusting device, including a driving motor 31 and a rotating rod 32. The driving motor 31 is a DC motor or an AC motor, and the DC motor refers to a device capable of converting DC power into mechanical energy or converting mechanical energy into DC power. Rotating electric machine, which is a motor that can convert DC electric energy and mechanical energy. When it is used as a motor, it is a DC motor that converts electric energy into mechanical energy. When the generator is running, it is a DC generator that converts mechanical energy into electric energy. AC motor It is a device for converting electric energy of alternating current into mechanical energy. The alternating current motor is mainly composed of an electromagnet winding or a distributed stator winding for generating a magnetic field and a rotating armature or a rotor, and the motor is rotated by a force coil in a magnetic field. Made of phenomena.

The driving motor 31 is bidirectionally rotatable, the driving motor 31 is fixed to the base 10, and the rotating shaft extends through the base 10. The rotating shaft is rotatable relative to the base 10, and the rotating rod 32 is T a first rotating part, a first rotating rod and a second rotating rod, wherein the first rotating rod and the second rotating rod have the same structure and the same size, and are respectively disposed on two sides of the first rotating portion, The first rotating portion is provided with a second connecting hole, the number of the second connecting holes is one, the second connecting hole is fixedly connected with the rotating shaft of the driving motor 31, and the driving motor 31 is used for driving the driving The rotating lever 32 rotates. a first connecting post is disposed at an end of the first rotating rod away from the first rotating portion, the first connecting rod is perpendicular to the first rotating rod, and the second rotating rod is away from the first rotating portion One end is provided with a second connecting column, the second connecting column is perpendicular to the second rotating rod, and the number of the first connecting column and the second connecting column is one. The first connecting post passes through the first connecting hole 22 of the light blocking piece 20, and the rotating rod 32 drives the light blocking piece 20 to move while the driving motor 31 drives the rotating rod 32 to rotate. . It should be noted that, in the embodiment of the present application, the second connecting post may pass through the first connecting hole 22 of the light blocking sheet 20 .

The adjusting device 30 is a manual adjusting device, including a manual dial and a rotating lever 32. The manual dial is disposed on the base 10, and the manual dial can be rotated relative to the base 10, the manual dialing One end of the block is fixedly connected to the rotating rod 32, and the manual dial is used to drive the rotating rod 32 to rotate. The rotating rod 32 is movably connected with the first connecting hole 22 of the light blocking piece 20, While the manual dial drives the rotation of the rotating lever 32, the rotating lever 32 drives the light blocking member 20 to move. The specific principle is the same as the above-mentioned automatic adjusting device, and will not be repeated here.

The protection plate 40 is fixed to the base 10, and the connection between the protection plate 40 and the base 10 is screwed, and the protection plate 40 is provided with bending blocks on four sides, and the bending block is a first threaded hole is provided, the first threaded hole is a through hole, and four sides of the base 10 corresponding to the first threaded hole are provided with corresponding second threaded holes, and the second threaded holes are blind holes . The manner of fixing the protection plate 40 and the base 10 may also be welding, or other manners, which are not limited in the embodiment of the present application.

The protection plate 40 is provided with a light-emitting hole 41 corresponding to the light-passing hole 11 , and the light-emitting hole 41 is a through hole, and the protection plate 40 is further provided with the first on the light-blocking sheet 20 . a second strip-shaped limiting hole 42 corresponding to the strip-shaped limiting hole 21, the limiting post 13 on the base 10 passes through the first strip-shaped limiting hole 21, and is inserted into the second strip-shaped limiting hole Inside the hole 42. It should be noted that the light exit hole 41 of the protection plate 40 may have a square shape or other shapes, or may not be provided with the light hole 41.

The present application also provides a projector embodiment, the projector comprising the above aperture, further comprising an illumination source and a projection lens, the aperture being located between the illumination source and the projection lens, the light barrier plane and the projection The center optical axis of the lens is arranged to block light at a 45 degree setting. For the structure and function of the projector, reference may be made to the above-mentioned aperture embodiment, and details are not described herein again.

It should be noted that the preferred embodiments of the present application are given in the specification and the drawings of the present application, but the present application can be implemented in many different forms, and is not limited to the embodiments described in the present specification. These embodiments are not intended to be limiting of the scope of the present application, and the embodiments are provided to make the understanding of the disclosure of the present application more comprehensive. Further, each of the above technical features is further combined with each other to form various embodiments that are not listed above, and are considered to be within the scope of the specification of the present application; further, those skilled in the art can improve or change according to the above description. All such improvements and modifications are intended to fall within the scope of the appended claims.

Claims

An aperture, comprising: a base, a light blocking sheet and an adjusting device;

a light passing hole is disposed on the base for the light beam to pass through;

The light blocking sheet is connected to the adjusting device,

The adjusting device is configured to control movement of the light blocking sheet to adjust a overlapping area of the light blocking sheet and the light passing hole, thereby adjusting a light passing amount of the light passing hole.
The aperture according to claim 1, wherein the aperture further comprises a protection plate, the protection plate is fixed to the base, and the light blocking plate is located between the protection plate and the base.
The aperture according to claim 2, wherein the connection of the protection plate to the base comprises screwing or welding.
The aperture according to claim 2, wherein the light blocking piece is provided with a first strip-shaped limiting hole, the base is provided with a finite column, and the limiting post is inserted away from one end of the base. The first strip is defined in the hole.
The aperture according to claim 4, wherein the protection plate is provided with a second strip-shaped limiting hole, and the second strip-shaped limiting hole corresponds to the first strip-shaped limiting hole, The end of the limiting post away from the base passes through the first strip-shaped limiting hole and is embedded in the second strip-shaped limiting hole.
The aperture according to claim 1, wherein the base is further provided with a sliding track, and the light blocking plate further comprises a sliding block corresponding to the sliding track, wherein the sliding block is located in the sliding track And the sliding block is slidable along the sliding track.
The aperture according to claim 1, wherein said adjusting means comprises a driving motor and a rotating lever;

The driving motor is fixed to the base, the rotating shaft of the driving motor is fixed to the rotating rod, and the driving motor is used to drive the rotating rod to rotate;

A first connecting hole is disposed on the light blocking plate, and a connecting post is disposed on the rotating rod, and the connecting post is disposed in the first connecting hole.
The aperture according to claim 1, wherein said adjusting means comprises a manual dial and a rotating lever;

The manual dial is disposed on the base, and the manual dial is rotatable relative to the base, one end of the manual dial is fixed with the rotating lever, and the manual dial is used to drive the rotation Rod rotation

a first connecting hole is disposed on the light blocking plate, a connecting post is disposed on the rotating rod, and the connecting post is disposed in the first connecting hole
A projector comprising the aperture of any of claims 1-8, the projector further comprising an illumination source and a projection lens, the aperture being intermediate the illumination source and the projection lens.
The projector according to claim 9, wherein the light blocking sheet plane is disposed at 45 degrees to a central optical axis of the projection lens to block light.