CN102540660A

CN102540660A - Projector

Info

Publication number: CN102540660A
Application number: CN2010106124103A
Authority: CN
Inventors: 李秉衡; 许义忠; 余泰成
Original assignee: Hongfujin Precision Industry Shenzhen Co Ltd; Hon Hai Precision Industry Co Ltd
Current assignee: Hongfujin Precision Industry Shenzhen Co Ltd; Hon Hai Precision Industry Co Ltd
Priority date: 2010-12-29
Filing date: 2010-12-29
Publication date: 2012-07-04
Anticipated expiration: 2030-12-29
Also published as: CN102540660B

Abstract

The invention discloses a projector. The projector comprises a case, an obstacle detection device, a projection lens accommodated in the case, a baffle device and a controller. The case comprises a side wall with a lens hole. Light rays emitted by the projection lens are projected to a projection interval through the lens hole. The baffle device comprises a baffle plate and a driver. The driver drives the baffle plate to slide to shade or open the lens hole. The obstacle detection device is fixed on the outer surface of the side wall and near the lens hole, and comprises a time measurement module, a storage module and a comparison module. The time measurement device transmits a detection wave to the projection interval and receives the detection wave, and measures a time period from time when the detection wave is transmitted outward to time when the detection wave is received to obtain measurement time. The storage module stores reference time. The comparison module compares the measurement time and the reference time to judge whether an obstacle exists at the projection interval. The controller controls the driver to drive the baffle plate to shade the lens hole when the obstacle exists at the projection interval to effectively protect eyes.

Description

Projector

Technical field

The present invention relates to a kind of projector.

Background technology

Usually; Exist between a projection area between projector and the screen; The user often need do explanation to the picture that projects when making bulletin, can unconsciously get between the projection area, in addition; Other staff also possibly be strayed between the projection area, just may shine directly into human eye and damage and step into projector sends between projection in zone light.And for projection goes out the more clear picture of Gao Gengliang, the light that projector sends may be more and more stronger, and therefore, this extent of injury is increasing gradually.

Summary of the invention

In view of this, be necessary to provide a kind of projector that can protect the human eye between projection in zone.

A kind of projector, it comprises a casing, an obstacle detector and is contained in a projection lens, a radical occlusion device, the controller in the said casing.Said casing comprises a sidewall that offers a camera aperture.The light of said projection lens outgoing projects between a projection in zone through said camera aperture.Said radical occlusion device comprises a shutter and a driver.Said driver is used to drive said shutter and slides to cover or to open said camera aperture.Said obstacle detector is fixed on the outside surface of said sidewall near the position of said camera aperture, and it comprises a time measurement module, a memory module and a comparison module.Said time measurement module is used between said projection area, launching one and detects ripple and receive said detection ripple, and measures said detection ripple from outwards being transmitted into the time between being received, to obtain a Measuring Time.Said memory module is used to store a reference time.Said reference time with when between said projection area during clear said detection ripple identical from outwards being transmitted into the received time.Said comparison module is used for more said Measuring Time and said reference time, and judges during less than said reference time to have barrier between said projection area and when said Measuring Time equals said reference time, judge in said Measuring Time and do not have barrier between said projection area.Said controller is used to control and drives said shutter when there is barrier in said driver between said projection area and cover said camera aperture, opens said camera aperture and drive said shutter when between said projection area, not having barrier.

Projector of the present invention utilizes said obstacle detector, controller and radical occlusion device, makes to block said camera aperture when having barrier between said projection area, thereby effectively protects human eye.

Description of drawings

Fig. 1 is the synoptic diagram of the projector of preferred embodiments of the present invention;

Fig. 2 is the synoptic diagram of another angle of the projector of Fig. 1;

Fig. 3 is the synoptic diagram of another state of the projector of Fig. 2;

Fig. 4 is the front elevation of installing plate of the projector of Fig. 1;

Fig. 5 is the functional block diagram of obstacle detector of the projector of Fig. 1.

The main element symbol description

Projector 100

Casing 10

Sidewall 11

First side 111

Second side 112

Camera aperture 113

Diapire 12

Projection lens 20

Radical occlusion device 30

Installing plate 31

Through hole 313

Chute 314

Shutter 32

Joint face 321

Block surface 322

Projection 325

Tooth bar 327

Driver 33

Motor 331

Rotating shaft 332

Teeth 333

Obstacle detector 50

Time measurement module 52

Memory module 54

Comparison module 56

Controller 60

Embodiment

To combine accompanying drawing below, the present invention will be done further detailed description.

See also Fig. 1 and Fig. 2, be a kind of projector 100 that embodiment of the present invention provides, it comprises a casing 10 and is contained in a projection lens 20 in the said casing 10, radical occlusion device 30, an obstacle detector 50 and a controller 60.Said projection lens 20 is used for image beam is incident upon a screen, to form enlarged image.Between said projection lens 20 and said screen, the interval that said image beam can shine forms between a projection area.In this embodiment, said projector 100 is a laser projection.

Said casing 10 is a rectangular structure, and it comprises an orthogonal sidewall 11 and a diapire 12.Said the first side wall 11 comprises relative a first side 111 and a second side 112.Offer a camera aperture 113 near the position of said first side 111 on the said sidewall 11.

Said radical occlusion device 30 comprises that an installing plate 31, one are slidingly arranged in shutter 32 and the driver 33 on the said installing plate 31.Said installing plate 31 is fixed on the inside surface of said casing 10 and covers said camera aperture 113.Said installing plate 31 offer one with said camera aperture 113 shapes, the corresponding through hole 313 of size and location.The exiting surface of said projection lens 20 is aimed at said camera aperture 113 and said through hole 313, makes the image beam of said projection lens 20 can pass through said through hole 313 and camera aperture 113, is incident upon on the said screen.Like Fig. 3 and shown in Figure 4, the position near said second side 112 on the said installing plate 31 offers two chutes that are parallel to each other 314.The guiding of said chute 314 is perpendicular to the optical axis of said projection lens 20, and is parallel to said diapire 12.Said chute 314 runs through the relative two sides of said installing plate 31 along the optical axis direction of said projection lens 20.In this embodiment, said camera aperture 113 and said through hole 313 equate along the cross-sectional area perpendicular to the optical axis direction of said projection lens 20, and greater than the area of the exiting surface of said projection lens 20.

Said shutter 32 comprises a joint face 321 and block surface 322 of opposing setting.Said joint face 321 is towards said installing plate 31.Said block surface 322 deviates from said installing plate 31.Correspondingly on the said joint face 321 be provided with two projections 325 with said two chutes 314.Each projection 325 is placed in the corresponding chute 314.The area of said block surface 322 is greater than the area of the exiting surface of said projection lens 20, and said block surface 322 is formed with a tooth bar 327; Said tooth bar 327 extends along the bearing of trend of said chute 314.

Said driver 33 is used to drive said shutter 32 and slides, and it comprises that a motor 331, a rotation are arranged on the rotating shaft 332 on the said motor 331.Said motor 331 is fixed on the said diapire 12.Said rotating shaft 332 be axially perpendicular to said diapire 12, and the outer circumference surface of said rotating shaft 332 is provided with a plurality of teeth 333.Said teeth 333 are meshed with said tooth bar 327.

Like Fig. 1 and shown in Figure 5, said obstacle detector 50 is fixed on the outside surface of said sidewall 11 near the position of said camera aperture 113, is used to detect whether have barrier between said projection area.Said obstacle detector 50 comprises a time measurement module 52, a memory module 54 and a comparison module 56.Said time measurement module 52 is used for emission one detection ripple and this detection ripple of reception between said projection area, to obtain a Measuring Time.Said memory module 54 is used to store a reference time; Said reference time with when between said projection area during clear said detection ripple identical from outwards being transmitted into the received time.Said comparison module 56; Be used for more each Measuring Time and reference time, and judge during less than said reference time to have barrier between said projection area and when said Measuring Time equals said reference time, judge in said Measuring Time and do not have barrier between said projection area.In this embodiment, said detection ripple is a ultrasound wave.In other embodiments, said detection ripple also can be other ripple, such as infrared ray.

Said controller 60 is electrically connected with said motor 331 and said obstacle detector 50, is used for the judged result according to said comparison module 56, controls said motor 331 and carries out forward or reverse.When in said obstacle detector 50 detects between said projection area, having barrier; The said motor 331 of said controller 60 controls is just changeing; Rotate to drive said rotating shaft 332; Said shutter 32 is slided towards said through hole 313,, make 20 image projected light beams of said projection lens can not arrive between the projection area to shelter from said camera aperture 113; When in said obstacle detector 50 detects between said projection area, not having barrier, said motor 331 counter-rotatings of said controller 60 controls are moved towards the direction away from said through hole 313 to drive said shutter 32, to open said camera aperture 113.

In other embodiments, said chute 314 also can only be opened in said installing plate 31 on the surface of said shutter 32.

In other embodiments, said camera aperture 113 can be unequal perpendicular to the cross-sectional area of the optical axis direction of said projection lens 20 with said through hole 313 edges, and the area of said block surface 322 only needs to get final product greater than the area of the exiting surface of said projection lens 20.

In other embodiments, said motor 331 also can be arranged on other positions in the said casing 10, such as be arranged on adjoining other sidewalls of said sidewall 11 on, only otherwise the layout that influences other elements in the said projector 100 gets final product.

It is understandable that, for the person of ordinary skill of the art, can make other various corresponding changes and distortion by technical conceive according to the present invention, and all these change the protection domain that all should belong to claim of the present invention with distortion.

Claims

1. projector, it comprises a casing, an obstacle detector and is contained in a projection lens, a radical occlusion device, the controller in the said casing; Said casing comprises a sidewall that offers camera aperture; The light of said projection lens outgoing projects between a projection in zone through said camera aperture; Said radical occlusion device comprises a shutter and a driver; Said driver is used to drive said shutter and slides to cover or to open said camera aperture; Said obstacle detector is fixed on the outside surface of said sidewall the position near said camera aperture; It comprises a time measurement module, a memory module and a comparison module; Said time measurement module is used between said projection area, launching one and detects ripple and receive said detection ripple; And measure said detection ripple from outwards being transmitted into the time between being received, to obtain a Measuring Time; Said memory module is used to store a reference time; Said reference time with when between said projection area during clear said detection ripple identical from outwards being transmitted into the received time; Said comparison module is used for more said Measuring Time and said reference time, and judges during less than said reference time to have barrier between said projection area and when said Measuring Time equals said reference time, judge in said Measuring Time and do not have barrier between said projection area; Said controller is used to control and drives said shutter when there is barrier in said driver between said projection area and cover said camera aperture, opens said camera aperture and drive said shutter when between said projection area, not having barrier.

2. projector as claimed in claim 1; It is characterized in that; Said radical occlusion device also comprises an installing plate, and said installing plate is fixed on the inside surface of said casing and covers said camera aperture, said installing plate offer one with said camera aperture shape, the corresponding through hole of size and location; Said shutter is slidingly arranged on the surface of said installing plate away from said sidewall.

3. projector as claimed in claim 2 is characterized in that, said casing also comprises a sidewall and one and the perpendicular diapire of said sidewall, and said camera aperture is opened on the said sidewall; Said installing plate is offered two chutes that are positioned at said through hole both sides and are parallel to each other on the surface of said shutter, the guiding of said chute is perpendicular to the optical axis of said projection lens, and is parallel to said diapire; Said shutter comprises a joint face towards said installing plate, correspondingly with said chute on the said joint face is provided with two projections, and said two projections are placed in respectively in the corresponding chute.

4. projector as claimed in claim 3 is characterized in that, said shutter also comprise one with the opposing block surface of said joint face, be formed with a tooth bar on the said block surface; Said tooth bar extends along the bearing of trend of said chute, and said driver comprises a rotating shaft, and the outer circumference surface of said rotating shaft is provided with the teeth that a plurality of and said tooth bar is meshed.

5. projector as claimed in claim 4 is characterized in that, said driver also comprises a motor, and said motor is used to drive said rotating shaft and rotates, and said rotating shaft be axially perpendicular to said diapire.

6. projector as claimed in claim 1 is characterized in that, said detection ripple is ultrasound wave or infrared ray.

7. projector as claimed in claim 1 is characterized in that, said projector is a laser projection.