CN209267724U - Projection arrangement - Google Patents

Abstract

The utility model proposes a kind of projection arrangements.The projection arrangement includes projection lens, image generation light path module, image capture unit and controller.Image generates light path module to generate visible image and black light image according to control signal, and will be seen that optical image and black light image are projected through projection lens towards view field.Image capture unit obtains black light to shoot view field with reference to image.Controller is coupled to projection lens, image generates light path module and image capture unit, to refer to image and black light image according to black light, corrects projection lens and control signal at least one.The projection arrangement automatically calibrating lens parameters or adjustment presentation content of the utility model, promote projection quality and user's experience.

Description

Projection arrangement

Technical field

The utility model relates to a kind of shadow casting technique, and in particular to a kind of throwing with self correcting capability Image device.

Background technique

In general, the position of projector, quantity can be changed with the demand in display.Whenever the position of projector Set, quantity change when, user must manually readjust the projection relevant parameter of projector, can just make projection effect symbol It closes and is expected.

For example, when the area change of the position of projector or projection, user must manually adjust throwing again Focal length or progress keystone of shadow camera lens etc., can be projected out normal length-width ratio, undeformed sharp image.It lifts another For example, when projecting a big type image jointly using more projectors, user must be in the display of every projector Appearance is adjusted, and the project content of every projector can be made to be spliced into more natural and undistorted large-scale image.However, Such process is time-consuming and laborious, and human error causes to adjust more precisely.

" background technique " paragraph is used only to help to understand the content of the present invention, therefore is taken off in " background technique " paragraph The content of dew may include some known technologies without road known to those skilled in the art in composition technical field.? Content disclosed by " background technique " paragraph, does not represent the content or the utility model one or more embodiment to be solved The problem of, it has been readily known to those persons skilled in the art or has recognized before the present utility model application.

Utility model content

The utility model provides a kind of projection arrangement, automatically calibrating lens parameters or adjustment presentation content, promotes projection Quality and user's experience.

The other objects and advantages of the utility model can be obtained from the technical characteristic disclosed by the utility model into one The understanding of step.

It is to propose one kind up to one of above-mentioned or part or all of purpose or other purposes, an embodiment of the utility model Projection arrangement, including projection lens, image generate light path module, image capture unit and controller.Image generates optical path mould Block will be seen that optical image and black light to generate visible image and black light image according to control signal Image is projected through projection lens towards view field.Image capture unit obtains invisible to shoot view field Beche-de-mer without spike examines image.Controller is coupled to projection lens, image generates light path module and image capture unit, can not to basis It is light-exposed to refer to image and black light image, correct projection lens and control signal at least one.

Based on above-mentioned, the projection arrangement of the utility model embodiment will be seen that optical image with black light image through same A projection lens projects in identical view field, then shoots view field to obtain black light with reference to image, just can According to the black light image projected and the black light taken with reference to image come to projection lens or projected can The presentation content of light-exposed image is corrected.Accordingly, it is not influencing under normal projection, it can automatically corrective lens parameter or tune Whole presentation content promotes projection quality and user's experience.

In order to make the above-mentioned features and advantages of the utility model more obvious and understandable, special embodiment below, and cooperate attached drawing It is described in detail below.

Detailed description of the invention

Fig. 1 is painted the block diagram of the projection arrangement of an embodiment of the present invention.

Fig. 2A is painted the block diagram of the projection arrangement of an embodiment of the present invention.

Fig. 2 B is painted the schematic diagram of the filter wheel of an embodiment of the present invention.

Fig. 3 A is painted the block diagram of the projection arrangement of an embodiment of the present invention.

Fig. 3 B is painted the schematic diagram of the filter wheel of an embodiment of the present invention.

Fig. 4 is painted the schematic diagram of the default pattern of an embodiment of the present invention.

Fig. 5 is painted the flow chart of the projecting method of an embodiment of the present invention.

Description of symbols

100: projection arrangement

110: controller

120: image generates light path module

121: visible light source

122: invisible light source

123a, 123b: filter wheel

124: image generating element

130: projection lens

140: image capture unit

BLKr, BLKg, BLKb, BLKy: visible light block

BLKx: black light block

CS: control signal

CS1: first control signal

CS2: second control signal

Iinv: black light image

Ivis: visible image

Linv, Linv ': black light

Lvis, Lvis ': visible light

PTN: default pattern

Rinv: black light refers to image

S510, S530, S550, S570: the step of projecting method.

Specific embodiment

In relation to addressing other technologies content, feature and effect before the utility model, the one of attached drawing is referred in following cooperation In the detailed description of preferred embodiment, can clearly it present.The direction term being previously mentioned in following embodiment, such as: upper, Under, it is left and right, front or rear etc., be only the direction with reference to attached drawing.Therefore, the direction term used is for illustrating not to be used to limit The utility model processed.In addition, the terms such as connection, coupling that the utility model uses, are the biographies for illustrating the signal between stream oriented device It passs, is not limited only to the relationship directly contacted between device.

Fig. 1 is painted the block diagram of the projection arrangement of an embodiment of the present invention.

Please refer to Fig. 1, projection arrangement 100 include controller 110, image generate light path module 120, projection lens 130 with And image capture unit 140, wherein controller 110 is coupled to image and generates light path module 120, projection lens 130 and image Capture device 140.

In the present embodiment, controller 110 is control chip (for example, TI chip) and field programmable gate array The combination of (Field Programmable Gate Array, FPGA).However, the utility model is not limited herein.At other In embodiment, controller 110 be also possible to by central processing unit (Central Processing Unit, CPU) or its Microprocessor (Microprocessor), the digital signal processor (Digital of his programmable general service or specific use Signal Processor, DSP), programmable controller, special application integrated circuit (Application Specific Integrated Circuits, ASIC), programmable logic device (Programmable Logic Device, PLD) or its The combinations of his similar device or these devices is implemented.

In the present embodiment, controller 110 can receive the video signal outside projection arrangement 100, generate control accordingly Signal CS processed simultaneously sends it to image generation light path module 120.Image generates light path module 120 and can control based on the received Signal CS processed generates visible image Ivis and black light image Iinv, and allows visible image Ivis and can not Light-exposed image Iinv is projected to view field by the same projection lens 130 and (is not painted).In particular, being projected on projected area The visible image Ivis in domain is the image for allowing user to watch, such as the photo that is inputted of video signal or film etc.；And it throws Shadow is in the image that the black light image Iinv of view field is for carrying out subsequent correction.

In the present embodiment, image capture unit 140 is video camera and visible light filter element (for example, visible light filters Mirror) combination, to filter out visible light when shooting view field, to obtain black light with reference to image Rinv and being passed Return controller 110.It is noted that as long as view field can be shot and obtain black light with reference to image Rinv, this reality With the novel specific embodiment for not limiting image capture unit 140 herein.In particular, the projection based on projection lens 130 The factors such as the surface smoothness of parameter (for example, focal length etc.) or view field, image generates can not caused by light path module 120 Light-exposed image Iinv may be identical or different with reference to image Rinv with black light acquired by image capture unit 140.

It is noted that in the present embodiment, image generation light path module 120 can make visible image Ivis and can not Light-exposed image Iinv is overlapped in view field.Accordingly, controller 110 can be from the black light image Iinv in view field Actual displayed situation (for example, black light refer to image Rinv) learn reality of the visible image Ivis in view field Display situation.

In the present embodiment, controller 110 can refer to image Rinv according to black light image Iinv and black light It needs the project that corrects to calculate projection arrangement 100 and is corrected.

In some embodiments, projection arrangement 100 has the abilities such as auto-focusing and adjust automatically projected position.It is specific next It says, image Rinv is referred to according to known black light image Iinv and black light, controller 110 can correct projection lens 130, to adjust black light with reference to characteristics such as focal length, length-width ratio, shape and the positions of image Rinv.Due to black light image Iinv and visible image Ivis is to be projected through the same projection lens 130, therefore refer to image according to black light The projection lens 130 that Rinv is corrected can also make visible image Ivis after projecting to view field have focal length appropriate, The characteristics such as length-width ratio, shape and position.

In some embodiments, projection arrangement 100 has the abilities such as auto Deformation and automatic Mosaic adjustment.Specifically, Controller 110 can also judge visible image with reference to image Rinv according to known black light image Iinv and black light Whether the presentation content of Ivis, which needs, adjusts, and adjusts the presentation content for needing to adjust by adjustment control signal.Citing For, if controller 110 judges that black light deformation (warp) occurs with reference to image Rinv, indicate visible image Ivis projection Also it will appear deformation after to view field.Therefore, controller 110, which can will be seen that, deforms (pre- before optical image Ivis is carried out Warp control signal CS) is generated accordingly again, it can be with after projecting to view field with deformed visible image Ivis before allowing It is indeformable.For by way of further example, when needing the projection shadow of the visible image Ivis of projection arrangement 100 and other projection arrangements As when being spliced, controller 110 can judge to spell according to black light image Iinv and black light with reference to image Rinv Relative position when connecing, and will be seen that optical image Ivis carries out corresponding edge virtualization (for example, through distance conversion Modes such as (distance transform)) after generate control signal CS accordingly again, allow it to more natural splice.

It is noted that controller 110 is adjusted in the presentation content that will be seen that optical image Ivis (for example, preceding change Shape or edge virtualization etc.) when also the presentation content of black light image Iinv can be subjected to identical adjustment, so can be by shadow Controller 110 is fed back to as the adjustment state of content refers to image Rinv through black light, and then promotes the accurate of adjustment Degree.In addition, the utility model does not refer to shadow according to black light image Iinv and black light in this restriction controller 110 As the next corrected details of Rinv and detailed programs, those skilled in the art, which work as, to implement according to actual demand.

The embodiment that will illustrate projection arrangement 100 for two kinds of embodiments below, image produces in following two embodiment Raw light path module 120 has different designs.

Fig. 2A is painted the block diagram of the projection arrangement of an embodiment of the present invention；Fig. 2 B is painted the implementation of the utility model one The schematic diagram of the filter wheel of example.

Please also refer to Fig. 2A, it includes visible light source 121, invisible light source 122, filter wheel that image, which generates light path module 120, (filter wheel) 123a and image generating element 124.In the present embodiment, filter wheel 123a is set to visible light source Between 121 and image generating element 124, it is seen that the visible light Lvis that light source 121 is issued reaches shadow by filter wheel 123a As generating element 124, and the obstructed filtering mirror wheel 123a of black light Linv that invisible light source 122 is issued and reach image and produce Raw element 124.

In the present embodiment, it is seen that light source 121 to issue the visible light Lvis including a variety of different colours, e.g. by Laser diode (laser diode) or light emitting diode (Light-Emitting Diode, LED) collocation such as fluorescent wheel (phosphor wheel) equiwavelength's conversion element is implemented, but the utility model is not limited herein.In the present embodiment, may be used Light-exposed source 121 can issue the visible light Lvis of red green, blue and yellow.

B referring to figure 2., in the present embodiment, filter wheel 123a include multiple visible light block BLKr, BLKg, BLKb, BLKy, respectively to allow the visible light Lvis of red, green, blue and yellow by with become red, green, it is blue with And yellow visible light Lvis ' and reach image generating element 124.

In the present embodiment, control signal CS includes first control signal CS1 and second control signal CS2.Controller 110 can control the revolving speed of filter wheel 123a rotation and control filter wheel 123a through first control signal CS1, and red Color, green, blue and yellow visible light Lvis ' reach the timing of image generating element 124 and the revolving speed of filter wheel 123a It is related.

In the present embodiment, black light Linv of the invisible light source 122 to issue infrared light etc..

In the present embodiment, controller 110 can control image generating element 124 through second control signal CS2.Shadow As generating element 124 can turn the visible light Lvis ' of the various colors from filter wheel 123a according to second control signal CS2 The presentation content of corresponding color in visible image Ivis is changed into, to form visible image Ivis.Specifically, according to second Signal CS2 is controlled, the red visible light Lvis ' from filter wheel 123a can be converted into visible light by image generating element 124 The visible light Lvis ' of green from filter wheel 123a is converted into visible light by corresponding red presentation content in image Ivis The visible light Lvis ' of blue from filter wheel 123a is converted into visible light by the presentation content of corresponding green in image Ivis The presentation content of corresponding blue in image Ivis, and the visible light Lvis ' of the yellow from filter wheel 123a is converted into can The presentation content of yellow is corresponded in light-exposed image Ivis.Visible image Ivis can be passed to projection lens 130 by projecting Camera lens 130 is projected to view field.On the other hand, image generating element 124 can also be incited somebody to action according to second control signal CS2 Black light Linv from invisible light source 122 is converted into black light image Iinv, and by this black light image Iinv is transmitted to projection lens 130 to be projected by projection lens 130 to view field.In the present embodiment, image produces Raw element 124 is digital micromirror elements (Digital Micro-mirror Device, DMD), in other embodiments, image Generating element 124 is also possible to liquid crystal and covers silicon plate (Liquid Crystal On Silicon panel, LCoS panel) etc. Reflecting light modulator.In some embodiments, image generating element 124 is also possible to light transmitting liquid crystal panel (Transparent Liquid Crystal Panel), electro-optic modulators (Electro-Optical Modulator), maganeto-optic modulators The penetration light such as (Maganeto-Optic modulator), acousto-optic light modulation (Acousto-Optic Modulator, AOM) Modulator, but the utility model is not limited herein.

Fig. 3 A is painted the block diagram of the projection arrangement of another embodiment of the utility model；It is another that Fig. 3 B is painted the utility model The schematic diagram of the filter wheel of embodiment.

Please also refer to Fig. 3 A, it includes visible light source 121, invisible light source 122, filter wheel that image, which generates light path module 120, 123b and image generating element 124.In the present embodiment, filter wheel 123b is set to visible light source 121 and image generates member Between part 124, also it is set between invisible light source 122 and image generating element 124 simultaneously, it is seen that light source 121 was issued The black light Linv that visible light Lvis and invisible light source 122 are issued all passes through filter wheel 123b and just reaches image generation Element 124.

In the present embodiment, it is seen that light source 121, invisible light source 122 and image generating element 124 and Fig. 2A are implemented Visible light source 121, invisible light source 122 and image generating element 124 in example is identical, therefore not repeated explanation herein.

B referring to figure 3., in the present embodiment, filter wheel 123b include multiple visible light block BLKr, BLKg, BLKb, BLKy, respectively to allow the visible light Lvis of red, green, blue and yellow to pass through sequentially to become red, green, indigo plant Color and the visible light Lvis ' of yellow simultaneously reach image generating element 124.In addition, filter wheel 123b further includes black light area Block BLKx, to allow black light Linv to pass through to become black light Linv ' and reach image generating element 124.In particular, Since filter wheel 123b includes black light block BLKx, it is seen that area ratio shared by light block BLKr, BLKg, BLKb, BLKy Regular meeting is compressed, therefore the overall brightness of visible image Iinv can also decline therewith.In order to maintain visible image Ivis's Projection quality, area ratio black light block BLKx shared in filter wheel 123b must carry out control appropriate, such as Less than preset proportion threshold value etc..

In the present embodiment, control signal CS includes first control signal CS1 and second control signal CS2.Controller 110 can control filter wheel 123b rotation through first control signal CS1 and control the revolving speed of filter wheel 123b, and according to Revolving speed and black light block the BLKx area ratio shared by filter wheel 123b of filter wheel 123b, through the second control Signal CS2 controls image generating element 124 in the visible image Ivis and black light image for converting multiple colors The conversion timing sequence of Iinv.For example, controller 110 controls the visible light of each color by first control signal CS1 Lvis ' forms the time with arrival image generating element 124, and controls image generating element by second control signal CS2 124 were converted into visible image Ivis in corresponding red image within the time that red visible light Lvis ' is reached Hold, is converted within the time that the visible light Lvis ' of green is reached in visible image Ivis in the image of corresponding green Hold, is converted within the time that the visible light Lvis ' of blue is reached in visible image Ivis in the image of corresponding blue Hold, is converted into the image for corresponding to yellow in visible image Ivis within the time that the visible light Lvis ' of yellow is reached Hold, and is converted into black light image Iinv within the time that black light Linv ' is reached.Visible image Ivis Projection lens 130 can be passed to black light image Iinv to be projected by projection lens 130 to view field.

In this way, which projection arrangement 100 just can will be seen that optical image Ivis and not through the same projection lens 130 Visible image Iinv is projected in view field, and shoots the black light of corresponding black light image Iinv with reference to image Rinv come correct accordingly projection lens 130 and control signal at least one.

Fig. 4 is painted the schematic diagram of the default pattern of an embodiment of the present invention.

Referring to figure 4., black light image Iinv is, for example, the image with default pattern PTN.Default pattern PTN is for example It is the grid with high contrast.In this way, after image capture unit 140 takes black light with reference to image Rinv, Controller 110 can preset pattern PTN and black light according to this and be corrected with reference to image Rinv.For example, into When row auto-focusing, comparison measurement is can be used to examine black light with reference to the comparison in image Rinv in controller 110, with Correct the focal length of projection lens 130.For by way of further example, when carrying out auto Deformation, controller 110 can be according to invisible Beche-de-mer without spike examines whether the grid in image Rinv is distorted to carry out pair to visible image Ivis and black light image Iinv The preceding deformation answered, until black light is non-warping with reference to the grid in image Rinv.However, the utility model and unlimited In this, those skilled in the art work as can set the presentation content of black light image Iinv and according to invisible according to its demand Beche-de-mer without spike examines image Rinv and carrys out corrected concrete mode.

In some embodiments, the presentation content of black light image Iinv is also possible to be identical to visible image Ivis Presentation content, the utility model do not limit herein.

Fig. 5 is painted the flow chart of the projecting method of an embodiment of the present invention.

Projection arrangement 100 of Fig. 5 embodiment suitable for previous embodiment, therefore below will be in collocation projection arrangement 100 Each item is illustrated.It is noted that the details of each step of the present embodiment can refer to saying for previous embodiment It is bright, it does not repeat to repeat herein.

Referring to figure 5., controller 110 can generate control signal CS first, and image generates the meeting basis of light path module 120 Signal CS is controlled to generate visible image Ivis and black light image Iinv (step S510).

Image generates light path module 120 and can transmit generated visible image Ivis and black light image Iinv To projection lens 130, will be seen that optical image Ivis and black light image Iinv towards projected area through projection lens 130 Domain is projected (step S530).

Image capture unit 140 can shoot view field, to obtain the invisible beche-de-mer without spike of corresponding black light image Iinv Image Rinv (step S550) is examined, and passes black light back controller 110 with reference to image Rinv.

Then, controller 110 can refer to image Rinv and black light image Iinv according to black light, and correction is thrown Shadow camera lens 130 and at least one (the step S570) for controlling signal.

In conclusion the projection arrangement of the utility model embodiment will be seen that optical image with black light image through same A projection lens projects in identical view field, then shoots view field to obtain black light with reference to image, just can According to the black light image projected and the black light taken with reference to image come to projection lens or projected can The presentation content of light-exposed image is corrected.Accordingly, it is not influencing under normal projection, it can automatically corrective lens parameter or tune Whole presentation content promotes projection quality and user's experience.

The above, the only preferred embodiment of the utility model are implemented when that cannot limit the utility model with this Range, i.e., it is all according to simple equivalence changes made by the utility model claims book and utility model description with repair Change, all still belong to the utility model patent covering in the range of.In addition any embodiment or claim of the utility model are not necessary to Reach whole purposes or advantage or feature disclosed by the utility model.In addition, abstract part and utility model title are only to use It is used to assist patent document to retrieve, not is used to limit the interest field of the utility model.In addition, this specification or right are wanted It asks the terms such as " first " that refers in book, " second " to be only used for the title of name element (element), and is not used to limit member The quantitative upper limit of part or lower limit.

Claims (10)

1. a kind of projection arrangement, which is characterized in that the projection arrangement includes projection lens, image generation light path module, image Capture device and controller, in which:

The image generates light path module to generate visible image and black light image according to control signal, and will The visible image and the black light image are projected through the projection lens towards view field；

The image capture unit obtains black light to shoot the view field with reference to image；And

The controller is coupled to the projection lens, the image generates light path module and the image capture unit, uses To refer to image and the black light image according to the black light, the projection lens and control letter are corrected Number at least one.

2. projection arrangement according to claim 1, which is characterized in that it includes visible light that the image, which generates light path module, Source, invisible light source, image generating element and filter wheel, in which:

The visible light source is to generate visible light；

The invisible light source is to generate black light；

The image generating element the visible light is converted to the visible image according to the control signal, and The black light is converted into the black light image；And

The filter wheel is set between the visible light source and the image generating element, wherein the filter wheel includes at least One visible light block, wherein the visible light is by least one described visible light block of the filter wheel to reach the shadow As generating element.

3. projection arrangement according to claim 2, which is characterized in that the black light not by the filter in turns Up to the image generating element.

4. projection arrangement according to claim 2, which is characterized in that the filter wheel further includes black light block, and And be set between the invisible light source and the image generating element, wherein the black light passes through the filter wheel The black light block is to reach the image generating element.

5. projection arrangement according to claim 4, which is characterized in that the controller according to the revolving speed of the filter wheel with And black light block area ratio shared by the filter wheel, it is described visible to control the image generating element conversion The timing of optical image and the black light image.

6. projection arrangement according to claim 1, which is characterized in that the image capture unit includes visible light optical filtering member Part.

7. projection arrangement according to claim 1, which is characterized in that the black light image is in the view field It is overlapped in the visible image.

8. projection arrangement according to claim 1, which is characterized in that the controller refers to shadow according to the black light Picture and the black light image, when correcting the projection lens and at least one for controlling signal, adjustment The focal length of the projection lens.

9. projection arrangement according to claim 1, which is characterized in that the controller refers to shadow according to the black light Picture and the black light image, when correcting the projection lens and at least one for controlling signal, adjustment The projected position of the projection lens.

10. projection arrangement according to claim 1, which is characterized in that the controller is referred to according to the black light Image and the black light image are adjusted when correcting the projection lens and at least one for controlling signal The whole control signal is to change the presentation content of the presentation content and the black light image of the visible image.