CN105549207B - Various visual angles 3 d display device and its angle enlargement screen - Google Patents
Various visual angles 3 d display device and its angle enlargement screen Download PDFInfo
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- CN105549207B CN105549207B CN201410598714.7A CN201410598714A CN105549207B CN 105549207 B CN105549207 B CN 105549207B CN 201410598714 A CN201410598714 A CN 201410598714A CN 105549207 B CN105549207 B CN 105549207B
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Abstract
The disclosure provides a kind of various visual angles 3 d display device and its angle enlargement screen.The various visual angles 3 d display device, it is increased the visual angle of the image strip from a projection lens using an angle enlargement screen.Angle enlargement screen includes one first lens unit, a central lens unit and one second lens unit sequential.First lens unit is to be configured to receive image strip.Central lens unit is to be configured to receive the image strip from the first lens unit and change its direction of transfer, to be projected to the second lens unit.Second lens unit is the visual angle for being configured to amplify the image strip.
Description
Technical field
This disclosure relates to a kind of display device and its optical element, more particularly to a kind of various visual angles 3 d display device and its
Angle enlargement screen.
Background technology
In recent years, more true to nature closer to real image in order to pursue, Display Technique, which is constantly weeded out the old and bring forth the new, makes its fitting
The demand of observer.The pursuit for resolution and color is shown from the plane at initial stage, more may be used to three-dimensional display apparatus in recent years
Further provide for third dimension of the observer in addition to image by.
The main action principle of stereoscopic display is to be sent respectively to the image for watching object of the different angle of right and left eyes, root
According to the visual characteristic of human eye, seen respectively regarding same image content in eyes but there are two images of different parallaxes (Parallax)
When, observer can feel that regarded thing has stereovision and depth perception, to experience a three dimensions stereopsis.Using upper big
Summary can be divided into need to additionally arrange in pairs or groups glasses viewing or it is directly naked regard two ways, technology main in recent years development is more with the latter
Based on.
The visual characteristic of foundation human eye, when eyes watch same image simultaneously, because two interorbital spaces are approximately 65mm, therefore
The image that eyes are seen can be slightly different, and forms stereopsis.Stereo display technique can be divided into spectacle
(stereoscopic) and naked eye type (auto-stereoscopic), wherein naked eye type stereo display technique again can be according to imaging
Mode, more it is subdivided into space multiplex type (spatial multiplex) and time domain multiplex type (time-multiplex).
Stereo display effect is reached with spatial multiplexing mode or time domain multiplexing mode however, no matter using, has its beautiful
The shortcomings that middle insufficient and it is to be overcome the problem of.Therefore, a kind of new multi-view stereoscopic display, it is to need effort badly for this industry
Target.
The content of the invention
The main purpose of the disclosure is to provide a kind of multi-view stereoscopic display, and it sends image using a light supply apparatus
Information, and in setting an angle enlargement screen on optical delivery path, with magnified image visual angle, to meet terminal applies demand.
According to an embodiment of the disclosure, above-mentioned multi-view stereoscopic display is configured to send an image strip including one
Projection lens and one be used for receive the image strip from the projection lens angle enlargement screen.In section Example
In, angle enlargement screen includes one first lens unit, one second lens unit and a central lens unit.First lens list
Member includes multiple first convex lens shape lens with one first focal length, is separated by one first spacing and is arranged along a set direction.
Second lens unit includes multiple second convex lens shape lens with one second focal length, and it is set along this to be separated by one second spacing
Direction arranges.Central lens unit is located between first lens unit and second lens unit, and with the first lens list
Member is separated by the spacing of first focal length.The central lens unit has a trifocal central convex lens shape lens including multiple,
One the 3rd spacing is separated by arrange along the set direction.3rd spacing meets following formula：
Wherein, PMFor the 3rd spacing, PAFor first spacing, TD is that the image strip reaches the angle from the projection lens
The projector distance of degree amplification screen, faFor first focal length, fmFor the 3rd focal length.
In some embodiments, the second spacing meets following formula：
Wherein, PBFor second spacing, N is the natural number more than or equal to 1.
In some embodiments, the first convex lens shape lens include one first axial convex lens shape lens, and described second
Convex lens shape lens include one second axial convex lens shape lens, and the optical axis of the first axial convex lens shape lens and second axial direction are convex
The optical axis of specular lens is co-located on a main shaft.
In the above-described embodiments, along the set direction, from another first convex lens of the adjacent first axial convex lens shape lens
Shape lens, which count first lens unit, includes X the first convex lens shape lens, and from the adjacent second axial convex lens shape
Another second convex lens shape lens of lens, which count second lens unit, includes X the second convex lens shape lens, wherein Y
The optical axis of the second convex lens shape lens is from the offset of light shaft offset one of Y the first convex lens shape lens, and the offset
Meet following formula：
OY=Y* [PB*N-PA]
Wherein, PBFor second spacing, OYFor the offset, Y is less than or equal to X, and N is the natural number more than or equal to 1.
In some embodiments, the image strip reaches the projector distance satisfaction of the angle enlargement screen from the projection lens
Following formula：
TD≥fa/OY*W/2
Wherein W is first lens unit in the width on the set direction.
In some embodiments, first focal length is equal to the 3rd focal length.
In some embodiments, the first focal length is more than second focal length.
In some embodiments, the central lens unit is separated by the spacing of second focal length with second lens unit.
In some embodiments, the angle enlargement screen is also arranged at adjacent two described including multiple shading elements
Between two convex lens shape lens.
In some embodiments, the angle enlargement screen is also arranged at adjacent two described including multiple shading elements
Between two convex lens shape lens.
In some embodiments, first lens unit is one of the forming with the central lens unit, first convex lens
Shape lens are towards an incident side (close to the side of the projection lens) for the angle enlargement screen, and central convex lens shape lens
And the second convex lens shape lens towards the angle enlargement screen a light emission side (away from the projection lens side).
In some embodiments, the angle enlargement screen includes multiple second lens units, second lens unit according to
Sequence arranges along the set direction.
After the embodiment refering to accompanying drawing and then described, this technical field technical staff can understand the mesh of the disclosure
, and the technological means and embodiment aspect of the disclosure.
Brief description of the drawings
Fig. 1 shows the schematic diagram of the various visual angles 3 d display device of the section Example of the disclosure.
Fig. 2 shows the part-structure schematic diagram of the various visual angles 3 d display device of the section Example of the disclosure.
Fig. 3 shows the part-structure schematic diagram of the various visual angles 3 d display device of the section Example of the disclosure.
Fig. 4 shows the part-structure schematic diagram of the various visual angles 3 d display device of the section Example of the disclosure.
Fig. 5 shows the part-structure schematic diagram of the angle enlargement screen of the section Example of the disclosure.
Fig. 6 shows the part-structure schematic diagram of the angle enlargement screen of the section Example of the disclosure.
Description of reference numerals：
1st, 1a~various visual angles 3 d display device
11~light source module
112~projection lens
12nd, 13~optical path switching device
14th, 14a, 14b~angle enlargement screen
20~the first lens units
21st, 22,23~the first convex lens shape lens
30th, 30a, 30b~central lens unit
31a, 32a, 33a~central convex lens shape lens
31b, 32b, 33b~central convex lens shape lens
40th, the lens unit of 40a, 40b, 40c~second
41st, 42,43~the second convex lens shape lens
The convex lens shape lens of 41a, 42a, 43a~second
The convex lens shape lens of 41b, 42b, 43b~second
The convex lens shape lens of 41c, 42c, 43c, 44c, 45c~second
60~Fresnel lens
80~vertical diffuser
90~viewing areas
C~main shaft
D~set direction
fa~the first focal length
fb~the second focal length
fm~the three focal length
O1、O2~offset
PA~the first spacing
PB~the second spacing
PM~the three spacing
R0, R1, R2, R3, R4, R5, R6~coordinate
W~width
TD~projector distance
Embodiment
A kind of various visual angles 3 d display device of the disclosure will be explained by embodiment below.Need expositor, the disclosure
Embodiment and being not used to limit the disclosure need to can in any specific environment, application or particular form as described embodiments
Implement.Explanation accordingly, with respect to embodiment is only to explain the purpose of the disclosure, and is not used to limit the disclosure.It is in addition, described attached
Figure is drawn in a manner of slightly simplifying or slightly exaggerating ratio, and it is that shown element is simultaneously in order to help to understand the disclosure
Number, shape and dimension scale during non-implementation, it is not used to limit the disclosure, is first chatted in this conjunction bright.
Reference picture 1, it shows the schematic diagram of the various visual angles 3 d display device 1 of the section Example of the disclosure.In part
In embodiment, various visual angles 3 d display device 1 includes a light source module 11, multiple optical path switching devices, such as light path converting dress
Put 12,13 and one angle enlargement screen 14.It should be appreciated that the number of elements of various visual angles 3 d display device 1 can be on demand
Increase or decrease, do not limited by this embodiment.
In some embodiments, multiple image light are produced according to a signal of video signal referring to Fig. 2, light source module 11
Beam, and be substantially projected to along a main shaft C and via projection lens 112, optical path switching device 12,13 and angle enlargement screen 14
Viewing areas 90, to show that image frame is watched for beholder.In some embodiments, various visual angles 3 d display device 1 shows
In the image shown, each pixel be respectively by it is multiple have different directions (such as：15 directions) image pixel formed, with
A three-dimensional light field is established, and reaches the purpose of various visual angles viewing.Because the light source module 11 of the present invention produces the side of image strip
Formula is the existing element of this area, and non-for the of the invention content emphasized, not in this to go forth.
Reference picture 2, it shows the signal of the part-structure of the various visual angles 3 d display device 1 of the section Example of the disclosure
Figure, the part-structure of wherein angle enlargement screen 14 are not depicted in Fig. 2.In some embodiments, angle enlargement screen 14 includes
The lens unit 20 of one Fresnel lens (Fresnel Lens) 60, one first, one second lens unit 40 and a vertical diffuser
(vertical diffuser) 80 sequentially arranges along main shaft C.Fresnel lens 60 is the transmission for being configured to change image strip
Direction, transmit its direction along parallel main axis C.First lens unit 20 and the second lens unit 40 be configured to amplify into
Penetrate the visual angle of light.Vertical diffuser 80 is to be configured to be homogenized light, to lift picture quality.
In some embodiments, the first lens unit 20 includes multiple the first convex lens shape lens towards incident side protrusion
(Lenticular Lens), such as the first convex lens shape lens 21,22 and 23.First convex lens shape lens 21,22 and 23 have respectively
There is one first focal length fa, and arranged along a set direction D.Second lens unit 40 includes multiple towards the second convex of light emission side protrusion
Specular lens, such as the second convex lens shape lens 41,42 and 43.Second convex lens shape lens 41,42 and 43 have one second respectively
Focal length fb, and arranged along the set direction D.In some embodiments, the number of the first convex lens shape lens and the second convex lens shape lens
Amount be equal to respectively various visual angles 3 d display device 1 image pixel quantity (such as：1920*1080), it is more with corresponding adjustment
The optical characteristics of 1 each image pixel of view stereo display device.
In some embodiments, the spacing of two adjacent first convex lens shape lens 21,22 and 23, is the same as two phases
The spacing of adjacent second convex lens shape lens 41,42 and 43.Therefore, the optical axis of the second convex lens shape lens 41,42 and 43 aligns respectively
In the optical axis of the first convex lens shape lens 21,22 and 23.In some embodiments, the first convex lens shape on common optical axis is saturating
Mirror and the second convex lens shape lens are the visual angles for being configured to change image strip, make the visual angle of image strip by a less angle
Θ (such as：± 1 degree) be amplified to a larger angle, φ (such as：± 30 degree).The ratio of angle, φ and angle Θ is the same as
First focal length faWith the second focal length fbRatio.
As shown in Fig. 2 by the configuration of angle enlargement screen 14, multiple positions in viewing areas 90, which can all receive, to be come from
The stereopsis of various visual angles 3 d display device 1.However, when image strip with excessive incidence angle by Fresnel lens 60 when,
The image strip of Fresnel lens 60 will produce chromatic aberation (chromatic aberration).Because chromatic aberation can pass through first
The lens unit 40 of lens unit 20 and second further amplifies, and in turn results in image quality decline.Further, since the table of Fresnel lens 60
Face makes image easily have wave pattern or grooving formed with multiple grooves.
A kind of numerous embodiments of angle enlargement screen are provided further below, the shortcomings that to improve above-described embodiment.
Reference picture 3, it shows the schematic diagram of another various visual angles 3 d display device 1a of disclosure section Example, its
Middle angle enlargement screen 14a part-structure is not depicted in Fig. 3.In this embodiment, will be applied with the same or analogous elements of Fig. 2
Identical label is given, and its feature will not be described again, to simplify description.Various visual angles 3 d display device 1a's and Fig. 2 is more
The difference of view stereo display device 1 includes, and angle enlargement screen 14 is substituted by angle enlargement screen 14a.
In some embodiments, angle enlargement screen 14a include one first lens unit 20, a central lens unit 30a,
And one or more second lens unit 40a sequentially arrange along a main shaft C.First lens unit 20 includes multiple towards incident side protrusion
And there is one first focal length faThe first convex lens shape lens, such as：First convex lens shape lens 21,22 and 23.First convex lens shape is saturating
The optical axis of mirror 21,22 and 23 is separated by one first spacing PA, and arranged along a set direction D, wherein the first convex lens shape lens
21 optical axis alignment is on main shaft C.
Central lens unit 30a includes multiple protruding towards light emission side and having one a 3rd focal length fmCentral convex lens shape it is saturating
Mirror, such as：Central convex lens shape lens 31a, 32a and 33a.Central convex lens shape lens 31a, 32a and 33a optical axis are separated by
One the 3rd spacing PM, and arranged along set direction D, wherein central convex lens shape lens 31a optical axis alignment is on main shaft C.In portion
Divide in embodiment, central lens unit 30a is to be separated by the first focal length f with the first lens unit 20a, and with the second lens unit
40a is separated by the second focal length fb.In addition, by the image strips of the first convex lens shape lens 21,22 and 23 respectively via in corresponding
Entreat convex lens shape lens 31a, 32a and 33a focus.Therefore, the image strips of the first convex lens shape lens 21,22 and 23 is passed through
Direction of transfer, it is to be oriented to along parallel main axis C direction to advance by corresponding central convex lens shape lens 31a, 32a and 33a.
In some embodiments, as shown in figure 3, projection lens 112 is disposed on coordinate R0Position, the first convex lens shape is saturating
The center of mirror 21 and 22 is located at coordinate R respectively1、R2Position, central convex lens shape lens 31a and 32a focus is located at coordinate respectively
R3、R4Position.Due to triangle R1R2R0With triangle R3R4R0It is similar triangles, therefore the 3rd spacing PMBe meet it is following
Formula (1)：
Wherein, TD is the projector distance that the image strip reaches the first lens unit 20 from the projection lens 112, simple below
Claim projector distance.
Second lens unit 40a includes multiple protruding towards light emission side and having an one second focal length fbThe second convex lens shape it is saturating
Mirror, such as：Second convex lens shape lens 41a, 42a and 43a.Second convex lens shape lens 41a, 42a and 43a optical axis is separated by
One second spacing PBAnd arranged along set direction D, wherein the second convex lens shape lens 41a optical axis alignment is on main shaft C.In part
In embodiment, second convex lens shape lens 41a, 42a and 43a optical axis be respectively by image strip project corresponding to center it is convex
Specular lens 31a, 32a and 33a position, to amplify the image strip from central convex lens shape lens 31a, 32a and 33a
Visual angle.
For example, as shown in figure 3, image strip from the position that central convex lens shape lens 31a is projected is to be located at coordinate R5,
Second convex lens shape lens 41a optical axis is by coordinate R5.In addition, image strip is from the position that central convex lens shape lens 32a is projected
Put is to be located at coordinate R6, the second convex lens shape lens 42a optical axis is by coordinate R6.Due to triangle R1R2R0With triangle
R5R6R0It is similar triangles, therefore the second spacing PBIt is to meet following formula (2)：
By second convex lens shape lens 41a, 42a and 43a configuration, from central convex lens shape lens 31a, 32a and 33a
Image strip visual angle by a less angle Θ (such as：± 1 degree) be amplified to a larger angle, φ (such as：±30
Degree).The ratio of angle, φ and angle Θ is the same as the first focal length faWith the second focal length fbRatio.
It should be noted that learnt by formula (2), due to the second spacing PBMore than the first spacing PA, therefore towards away from main shaft C
Direction on, the offset of the optical axis of the second convex lens shape lens and the optical axis of the first convex lens shape lens will be cumulative.Implement in part
In example, along the set direction D, from next of the first convex lens shape lens (the first axial convex lens shape lens) on main shaft C
First convex lens shape lens are counted, and the first lens unit 20 includes X the first convex lens shape lens altogether.Also, along the set direction D,
Counted from next the second convex lens shape lens of the second convex lens shape lens (the second axial convex lens shape lens) on main shaft, the
Two lens unit 40a include X the second convex lens shape lens altogether.The optical axis and Y the first convex lens of Y the second convex lens shape lens
The offset of the optical axis of shape lens is to meet following formula (3):
OY=Y* [PB-PA](3)
Wherein Y≤X.
For example, as shown in figure 3, certainly along the set direction D, from (the first axial convex lens shape of the first convex lens shape lens 21
Lens) next the first convex lens shape lens 22 count, the first lens unit 20 includes 2 the first convex lens shape lens altogether.Also,
Along the set direction D, from next the second convex lens shape lens of the second convex lens shape lens 41a (the second axial convex lens shape lens)
42a is counted, and the second lens unit 40a includes 2 the second convex lens shape lens altogether.1st the second convex lens shape lens 42a optical axis with
The offset O of the optical axis of 1st the first convex lens shape lens 221=PB-PA.2nd the second convex lens shape lens 43a optical axis and the 2nd
The offset O of the optical axis of individual first convex lens shape lens 232=2* (PB-PA), the rest may be inferred.
Reference picture 4, in some embodiments, the first lens unit 20 and central lens unit 30a is respectively two optics
Diaphragm, wherein the first lens unit 20 forms the opposing face of the first convex lens shape lens, it is to form center with central lens unit 30a
The opposing face of convex lens shape lens engaged using appropriate mode (such as：It is glued), to form a complex optics diaphragm.However, the
One lens unit 20 and central lens unit 30a can also integrally formed mode be made.
In some embodiments, angle enlargement screen 14a includes multiple second lens units, such as：Second lens unit
40a1,40a2 and 40a3.Second lens unit 40a1 center is that alignment main shaft C is set, the second lens unit 40a2 and second
Lens unit 40a3 is the both sides for being respectively arranged at the second lens unit 40a1.Due to second lens unit 40a1,40a2 and
40a3 can be positioned each relative to central lens unit 30a, and angle enlargement screen 14a image pixel can be lifted.
In addition, under conditions of optical quality is not sacrificed, the margin of the second convex lens shape lens of the second lens unit to each other
(allowance) can also improve, favourable cost of manufacture reduces.
In some embodiments, the quantity of the first convex lens shape lens of the first lens unit 20 is to be equal to various visual angles solid
The image pixel of display device 1 quantity (such as：1920*1080).The number of central lens unit 30a central convex lens shape lens
Amount is equal to the quantity of the first convex lens shape lens of the first lens unit 20.Second lens unit 40a the second convex lens shape lens
Quantity be equal to the first lens unit 20 the first convex lens shape lens quantity.In in use, the first lens unit 20
One convex lens shape lens are directed towards close to the side of projection lens 112, central lens unit 30a central convex lens shape lens and second
Lens unit 40a the second convex lens shape lens are directed towards the side away from projection lens 112.It is vertical by above-mentioned configuration, various visual angles
The optical characteristics of 1 each image pixel of body display device can be adjusted respectively.
It is worth noting that, observation type (3) can be learnt, with the increase of Y value, offset OYI.e. corresponding increase.For control
Offset OYLess than a higher limit, image strip reaches angle enlargement screen 14a projector distance TD from the projection lens 112
It should increase as far as possible.It is preferred that projector distance TD is to meet following formula (4)：
TD=fa/OY*W/2 (4)
Wherein, W is the first lens unit 20 in the width on set direction D.
Reference picture 5, it shows the schematic diagram of the angle enlargement screen 14b of the section Example of present invention part-structure.
In this embodiment, identical label will be bestowed with the same or analogous elements of Fig. 3, and its feature will not be described again, with simplification
Description.
Angle enlargement screen 14b include one first lens unit 20, a central lens unit 30b and one or more second
Lens unit 40b sequentially arranges along a main shaft C.Central lens unit 30b has one the 3rd focal length f including multiplemIt is central convex
Specular lens, such as：Central convex lens shape lens 31b, 32b and 33b.Central convex lens shape lens 31b, 32b and 33b optical axis that
This is separated by one the 3rd spacing PMAnd arranged along the set direction D, wherein central convex lens shape lens 31b optical axis alignment is in main shaft C
On.In this embodiment, the first focal length faIt is to be equal to the 3rd focal length fm.According to the result of calculation of above-mentioned formula (1), the first spacing
PAIt is the same as the 3rd spacing PM.Central convex lens shape lens 31b, 32b and 33b optical axis are aligned in the first convex lens shape lens respectively
21st, 22 and 23 optical axis.
Second lens unit 40b has one second focal length f including multiplebThe second convex lens shape lens, such as：Second convex lens
Shape lens 41b, 42b and 43b.Second convex lens shape lens 41b, 42b and 43b optical axis is separated by one second spacing PBAnd edge
The set direction D arrangements, wherein the second convex lens shape lens 41b optical axis alignment is on main shaft C.In some embodiments, second
Convex lens shape lens 41b, 42b and 43b optical axis be respectively by image strip project corresponding to central convex lens shape lens 31b,
32b and 33b position, to amplify the visual angle of the image strip from central convex lens shape lens 31b, 32b and 33b.Therefore,
Two spacing PBAlso above-mentioned formula (2) is met.
In some embodiments, two adjacent the second convex lens shape lens are to be closely adjacent to each other, and no flat surfaces are formed at it
Between.In some embodiments, the curvature of the second convex lens shape lens can have change.For example, adjacent to the region of optical axis
Curvature is more than the curvature in the region away from optical axis.On the other hand, as shown in figure 5, two adjacent the second convex lens shape lens 41b,
It can be covered between 42b and 43b by a shading element 50b, to increase picture contrast.
Reference picture 6, it shows the schematic diagram of the angle enlargement screen 14c of the section Example of present invention part-structure.
In this embodiment, identical label will be bestowed with the same or analogous elements of Fig. 3, and its feature will not be described again, with simplification
Description.Angle enlargement screen 14c include one first lens unit 20, a central lens unit 30b and one or more second
Lens unit 40c sequentially arranges along a main shaft C.
Second lens unit 40c includes multiple protruding towards light emission side and having an one second focal length fbThe second convex lens shape it is saturating
Mirror, such as：Second convex lens shape lens 41c, 42c, 43c, 44c, 45c and 46c.Second convex lens shape lens 41c, 42c, 43c,
44c, 45c and 46c optical axis are separated by one second spacing PBAnd arranged along the set direction D, wherein the second convex lens shape lens
41c optical axis alignment is on main shaft C.In some embodiments, second convex lens shape lens 41c, 43c and 45c optical axis is difference
By image strip project corresponding to central convex lens shape lens 31b, 32b and 33b position, with amplification come from central convex lens shape
The visual angle of lens 31b, 32b and 33b image strip.Second convex lens shape lens 42c be arranged at the second convex lens shape lens 41c and
Between 43c.Second convex lens shape lens 44c is arranged between the second convex lens shape lens 43c and 45c.
It should be noted that the second convex lens shape lens 42c and 44c making for being configured to simplify the second lens unit 40c
Mode, the visual angle of the image strip from central lens unit 30b are not put via the second convex lens shape lens 42c and 44c
Greatly.For clear explanation, second convex lens shape lens 41c, 43c and 45c is referred to as " function lens " in illustrating below, the second convex lens
Shape lens 42c and 44c are referred to as " structure lens ".
Although it should be appreciated that in the embodiment that Fig. 6 is shown, it is saturating to be only arranged at two functions with a structure lens
Between mirror, but the disclosure is not restricted to this.It is saturating that multiple structures can be arranged at according to optical demands, between two function lens
Mirror.Therefore, the second spacing PBMeet following formula (2) '：
Wherein, N is the quantity of structure lens between two function lens.
In some embodiments, along the set direction D, from the first convex lens shape lens on main shaft C, (first is axially convex
Specular lens) next the first convex lens shape lens count, the first lens unit 20 includes X the first convex lens shape lens altogether.And
And along the set direction D, calculated from next function lens of the function lens (the second axial convex lens shape lens) on main shaft
Rise, the second lens unit 40a includes X function lens altogether.The optical axis and Y the first convex lens shape lens of Y function lens
The offset of optical axis be to meet following formula (3) '：
OY=Y* [PB*N-PA] (3)’
Wherein, Y≤X.
For example, as shown in fig. 6, along the set direction D, from the first convex lens shape lens 21, (the first axial convex lens shape is saturating
Mirror) next the first convex lens shape lens 22 count, the first lens unit 20 includes 2 the first convex lens shape lens altogether.Also, edge
The set direction D, counted from function lens 41c (the second axial convex lens shape lens) next function lens 43c, the second lens
Unit 40c includes 2 function lens altogether.1st function lens 43c optical axis and the optical axis of the 1st the first convex lens shape lens 22
Offset O1=PB*2-PA.2nd the second convex lens shape lens 45c optical axis and the optical axis of the 2nd the first convex lens shape lens 23
Offset O2=2* (PB*2-PA), the rest may be inferred.
The disclosure provides a kind of various visual angles 3 d display device, and it will come from a projection lens using an angle enlargement screen
Image strip visual angle increase, with provide a viewing areas in positioned at diverse location beholder's different directions three-dimensional shadow
Picture.In some embodiments, angle enlargement screen is to substitute Fresnel lens with a central lens unit, not sacrifice optics
Under conditions of quality, reach the purpose at amplification visual angle.
Although the disclosure is disclosed as above with specific preferred embodiment, so it is not limited to the disclosure, any ripe
Skilled person is practised, without departing from the spirit and scope of the present invention, can still make a little variation and retouching, therefore the disclosure
Protection domain is worked as to be defined depending on as defined in claim.
Claims (12)
- A kind of 1. angle enlargement screen, suitable for receiving the image strip from a projection lens, the angle enlargement screen bag Include：One first lens unit, including multiple first convex lens shape lens with one first focal length, are separated by one first spacing And arranged along a set direction；One second lens unit, including multiple second convex lens shape lens with one second focal length, are separated by one second spacing And arranged along the set direction；AndOne central lens unit, between first lens unit and second lens unit, and with first lens unit It is separated by the spacing of first focal length, wherein the central lens unit has a trifocal central convex lens shape saturating including multiple Mirror, it is separated by one the 3rd spacing and is arranged along the set direction, the 3rd spacing meets following formula：<mrow> <msub> <mi>P</mi> <mi>M</mi> </msub> <mo>=</mo> <mfrac> <msub> <mi>P</mi> <mi>A</mi> </msub> <mrow> <mi>T</mi> <mi>D</mi> </mrow> </mfrac> <mo>&times;</mo> <mrow> <mo>(</mo> <mi>T</mi> <mi>D</mi> <mo>+</mo> <msub> <mi>f</mi> <mi>a</mi> </msub> <mo>-</mo> <msub> <mi>f</mi> <mi>m</mi> </msub> <mo>)</mo> </mrow> </mrow>Wherein, PMFor the 3rd spacing, PAFor first spacing, TD reaches the angle from the projection lens for the image strip and put The projector distance of giant-screen, faFor first focal length, fmFor the 3rd focal length,Wherein second spacing meets following formula：<mrow> <msub> <mi>P</mi> <mi>B</mi> </msub> <mo>=</mo> <mfrac> <msub> <mi>P</mi> <mi>A</mi> </msub> <mi>N</mi> </mfrac> <mo>*</mo> <mfrac> <mrow> <mo>(</mo> <mi>T</mi> <mi>D</mi> <mo>+</mo> <msub> <mi>f</mi> <mi>a</mi> </msub> <mo>)</mo> </mrow> <mrow> <mi>T</mi> <mi>D</mi> </mrow> </mfrac> </mrow>Wherein, PBFor second spacing, N is the natural number more than or equal to 1.
- 2. angle enlargement screen as claimed in claim 1, wherein the first convex lens shape lens include one first axial convex lens Shape lens, and the second convex lens shape lens include one second axial convex lens shape lens, the light of the first axial convex lens shape lens The optical axis of axle and the second axial convex lens shape lens is co-located on a main shaft.
- 3. angle enlargement screen as claimed in claim 2, wherein along the set direction, it is saturating from the adjacent first axial convex lens shape Another first convex lens shape lens of mirror, which count first lens unit, includes X the first convex lens shape lens, and from adjacent Another second convex lens shape lens of the second axial convex lens shape lens, which count second lens unit, includes X second convex lens Shape lens, wherein the optical axis of Y the second convex lens shape lens is inclined from the light shaft offsets one of Y the first convex lens shape lens Shifting amount, and the offset meets following formula：OY=Y* [PB*N-PA]Wherein, PBFor second spacing, OYFor the offset, Y is less than or equal to X, and N is the natural number more than or equal to 1.
- 4. angle enlargement screen as claimed in claim 3, the wherein image strip reach the angle enlargement from the projection lens The projector distance of screen meets following formula：TD≥fa/OY*W/2Wherein, W is first lens unit in the width on the set direction.
- 5. angle enlargement screen as claimed in claim 1, wherein first focal length are equal to the 3rd focal length.
- 6. angle enlargement screen as claimed in claim 1, wherein the first focal length is more than second focal length.
- 7. angle enlargement screen as claimed in claim 1, wherein the central lens unit are separated by this with second lens unit The spacing of second focal length.
- 8. angle enlargement screen as claimed in claim 1, in addition to multiple shading elements are arranged at adjacent two described Between two convex lens shape lens.
- 9. angle enlargement screen as claimed in claim 1, including multiple second lens units, second lens unit is sequentially Along the set direction and connect.
- 10. a kind of various visual angles 3 d display device, including：One projection lens, it is to be configured to send an image strip；AndOne angle enlargement screen, it is to be configured to the image strip of reception from the projection lens, and including：One first lens unit, including multiple first convex lens shape lens with one first focal length, are separated by one first spacing Along a set direction arrangement；One second lens unit, including multiple second convex lens shape lens with one second focal length, are separated by one second spacing Arranged along the set direction；AndOne central lens unit, between first lens unit and second lens unit, and with first lens unit It is separated by the spacing of first focal length, wherein the central lens unit has a trifocal central convex lens shape saturating including multiple Mirror, it is separated by one the 3rd spacing and is arranged along the set direction, and the 3rd spacing meets following formula：<mrow> <msub> <mi>P</mi> <mi>M</mi> </msub> <mo>=</mo> <mfrac> <msub> <mi>P</mi> <mi>A</mi> </msub> <mrow> <mi>T</mi> <mi>D</mi> </mrow> </mfrac> <mo>&times;</mo> <mrow> <mo>(</mo> <mi>T</mi> <mi>D</mi> <mo>+</mo> <msub> <mi>f</mi> <mi>a</mi> </msub> <mo>-</mo> <msub> <mi>f</mi> <mi>m</mi> </msub> <mo>)</mo> </mrow> </mrow>Wherein, PMFor the 3rd spacing, PAFor first spacing, TD reaches the angle from the projection lens for the image strip and put The projector distance of giant-screen, faFor first focal length, fmFor the 3rd focal length,Wherein second spacing meets following formula：<mrow> <msub> <mi>P</mi> <mi>B</mi> </msub> <mo>=</mo> <mfrac> <msub> <mi>P</mi> <mi>A</mi> </msub> <mi>N</mi> </mfrac> <mo>*</mo> <mfrac> <mrow> <mo>(</mo> <mi>T</mi> <mi>D</mi> <mo>+</mo> <msub> <mi>f</mi> <mi>a</mi> </msub> <mo>)</mo> </mrow> <mrow> <mi>T</mi> <mi>D</mi> </mrow> </mfrac> </mrow>Wherein, PBFor second spacing, N is the natural number more than or equal to 1.
- 11. various visual angles 3 d display device as claimed in claim 10, wherein first lens unit and the central lens list Member is one of the forming, the first convex lens shape lens towards the angle enlargement screen close to the side of the projection lens, it is and described Central convex lens shape lens are towards the side of the angle enlargement screen away from the projection lens.
- It is saturating that 12. various visual angles 3 d display device as claimed in claim 10, wherein the angle enlargement screen include multiple second Mirror unit, second lens unit sequentially arrange along the set direction.
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| CN1430734A (en) * | 2000-05-19 | 2003-07-16 | 蒂博尔·包洛格 | Method and apparatus for displaying 3D images |
| CN1503026A (en) * | 2002-11-26 | 2004-06-09 | ���ǵ�����ʽ���� | Color luminous device and method, image projection device and method |
| CN103578367A (en) * | 2013-11-13 | 2014-02-12 | 广东威创视讯科技股份有限公司 | LED display device |
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| CN1430734A (en) * | 2000-05-19 | 2003-07-16 | 蒂博尔·包洛格 | Method and apparatus for displaying 3D images |
| CN1503026A (en) * | 2002-11-26 | 2004-06-09 | ���ǵ�����ʽ���� | Color luminous device and method, image projection device and method |
| CN103578367A (en) * | 2013-11-13 | 2014-02-12 | 广东威创视讯科技股份有限公司 | LED display device |
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