CN108388075A - Laser projection screen and laser projection system - Google Patents
Laser projection screen and laser projection system Download PDFInfo
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- CN108388075A CN108388075A CN201810226200.7A CN201810226200A CN108388075A CN 108388075 A CN108388075 A CN 108388075A CN 201810226200 A CN201810226200 A CN 201810226200A CN 108388075 A CN108388075 A CN 108388075A
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- optical signal
- laser projection
- projection screen
- lens array
- reflecting layer
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/54—Accessories
- G03B21/56—Projection screens
- G03B21/60—Projection screens characterised by the nature of the surface
- G03B21/602—Lenticular screens
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/54—Accessories
- G03B21/56—Projection screens
- G03B21/60—Projection screens characterised by the nature of the surface
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B35/00—Stereoscopic photography
- G03B35/18—Stereoscopic photography by simultaneous viewing
- G03B35/24—Stereoscopic photography by simultaneous viewing using apertured or refractive resolving means on screens or between screen and eye
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Projection Apparatus (AREA)
Abstract
The invention discloses a kind of laser projection screen and laser projection systems, belong to laser projection display technology field.Including substrate supports layer, the reflecting layer on substrate supports layer is set, and is arranged in column lens array of the reflecting layer far from substrate supports layer side；Reflecting layer is used to the optical signal that laser projection emits reflexing to column lens array；Column lens array is used for the optical signal focal imaging that reflects reflecting layer in the curved surface of column lens array, and the optical signal after focal imaging is divergent by curved surface；Column lens array includes multiple cylindrical lenses of parallel arrangement, the aperture width of each cylindrical lenses is equal to the sum of the width of two pixel ranges on reflecting layer, first pixel range is for receiving the first optical signal, for second pixel range for receiving the second optical signal, the first optical signal is different from the second optical signal.The present invention solves the problems, such as that the flexibility of 3D display in the related technology is relatively low and effect is poor.The present invention is used for 3D display.
Description
Technical field
The present invention relates to laser projection display technology field, more particularly to a kind of laser projection screen and laser projection system
System.
Background technology
Laser projection display technology is a kind of novel projection display technique currently on the market.Relative to traditional organic
Light emitting diode (English：Light Emitting Diode；Referred to as：LED) projection products, laser projection display technology are used
Laser have the characteristics that small, long lifespan and photoelectric conversion efficiency are high, in addition, the laser that is sent out by laser
Spectral width is relatively narrow, therefore it is imaged picture has the characteristics that contrast height, imaging clearly and bright-colored, laser these
Feature gradually makes laser projection display technology become the mainstream research direction of field of projection display.
Laser television is made of the laser projection and laser projection screen using reflective ultrashort out-of-focus projection's technology,
Laser television is because of the features such as its color purity is high, colour gamut is big and brightness is high, and shared share is gradually increased on TV market.
In the related technology, 3 dimension (English are being realized in laser television：Dimension；Referred to as：D general logical) when display function
Optical signal of the laser projection to laser projection screen transmitting different polarization direction is crossed, laser projection screen reflects the optical signal
To human eye, meanwhile, user needs to wear polaroid glasses to realize 3D perceptions.
But laser television in the related technology is needed when realizing 3D display function by polaroid glasses, 3D display
Flexibility is relatively low；And optical signal meeting reduce brightness when passing through polaroid glasses, cause the effect of 3D display poor.
Invention content
An embodiment of the present invention provides a kind of laser projection screen and laser projection systems, can solve 3D in the related technology
The problem that the flexibility of display is relatively low and the effect of 3D display is poor.The technical solution is as follows：
In a first aspect, providing a kind of laser projection screen, the laser projection screen includes substrate supports layer, and setting exists
Reflecting layer on the substrate supports layer, and be arranged in cylindrical lenses of the reflecting layer far from substrate supports layer side
Array；
The reflecting layer is used to the optical signal that laser projection emits reflexing to the column lens array；
The optical signal focal imaging that the column lens array is used to reflect in the reflecting layer is in the cylindrical lenses battle array
On the curved surface of row, and the optical signal after focal imaging is divergent by the curved surface；
Wherein, the column lens array includes multiple cylindrical lenses of parallel arrangement, the row of the multiple cylindrical lenses
Cloth is oriented parallel to the cross section in the reflecting layer, and the aperture width of each cylindrical lenses is equal on the reflecting layer
The sum of the width of two pixel ranges, the width of described two pixel ranges is equal, and the width of each pixel range is
The laser projection projects to the integral multiple of the width of a pixel on the reflecting layer, and described two pixel ranges include
First pixel range and the second pixel range, first pixel range is for receiving the first optical signal, second pixel region
Between for receiving the second optical signal, first optical signal is different from second optical signal.
Second aspect, provides a kind of laser projection system, and the laser projection system includes laser projection and such as the
On the one hand any laser projection screen；
The laser projection is used to emit optical signal to the laser projection screen.
The advantageous effect that technical solution provided in an embodiment of the present invention is brought is：
Laser projection screen and laser projection system provided in an embodiment of the present invention, the optical signal warp of laser projection transmitting
It crosses after column lens array and reaches reflecting layer, optical signal is reflexed to column lens array by reflecting layer, and column lens array is by light
Signal focus is imaged on the curved surface of column lens array, and the optical signal after focal imaging is divergent by curved surface, real
The picture of each pixel is now diffused into all directions.Due to each cylindrical lenses correspond to two pixel ranges, by human eye it
Between gap, and by the curved surface differential disperse function of cylindrical lenses, two can be made to be respectively received different pixels section
Optical signal, since the optical signal that two pixel ranges receive is different, the corresponding light letter of the pixel range that two observation arrives
It is number also different, to realize laser projection system bore hole 3D display function, improve the flexibility of 3D display, and be not necessarily to
User wears polaroid glasses, compared with the relevant technologies, the brightness fidelity of laser projection system provided in an embodiment of the present invention compared with
The display effect of height, 3D display is preferable.
Description of the drawings
Fig. 1 is a kind of structural schematic diagram of laser projection screen provided in an embodiment of the present invention；
Fig. 2 is a kind of structural schematic diagram of column lens array provided in an embodiment of the present invention；
Fig. 3 A are the vertical views that cylindrical lenses provided in an embodiment of the present invention act on optical signal；
Fig. 3 B are the side views that cylindrical lenses provided in an embodiment of the present invention act on optical signal；
Fig. 4 A are that laser projection screen provided in an embodiment of the present invention is imitated what the optical signal of single pixel point was reflected
True index path；
Fig. 4 B are the outgoing light signal energy distribution maps of single pixel point provided in an embodiment of the present invention；
Fig. 4 C are after the outgoing optical signal of single pixel point provided in an embodiment of the present invention is reflected via laser projection screen
Energy profile；
Fig. 5 A are that laser projection screen provided in an embodiment of the present invention is imitated what the optical signal of multiple pixels was reflected
True index path；
Fig. 5 B are a kind of image distribution signals that the outgoing optical signal of multiple pixels provided in an embodiment of the present invention is formed
Figure；
Fig. 5 C are that another image distribution that the outgoing optical signal of multiple pixels provided in an embodiment of the present invention is formed is shown
It is intended to；
Fig. 6 is a kind of setting schematic diagram of column lens array provided in an embodiment of the present invention；
Fig. 7 is the ray tracing schematic diagram of cylindrical lenses provided in an embodiment of the present invention；
Fig. 8 is the structural schematic diagram of another laser projection screen provided in an embodiment of the present invention；
Fig. 9 is the structural schematic diagram of another laser projection screen provided in an embodiment of the present invention；
Figure 10 is a kind of structural schematic diagram of laser projection system provided in an embodiment of the present invention.
Specific implementation mode
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with attached drawing to embodiment party of the present invention
Formula is described in further detail.
An embodiment of the present invention provides a kind of laser projection screens, as shown in Figure 1, the laser projection screen 10 includes：Lining
Bottom supporting layer 101, the reflecting layer 102 being arranged on substrate supports layer 101, and be arranged in reflecting layer 102 far from substrate supports
The column lens array 103 of 101 side of layer.
Reflecting layer 102 is used to the optical signal that laser projection emits reflexing to column lens array 103；
The optical signal focal imaging that column lens array 103 is used to reflect in reflecting layer 102 is in column lens array 103
On curved surface, and the optical signal after focal imaging is divergent by curved surface.
Wherein, the structure of column lens array can be with as shown in Fig. 2, column lens array 103 includes the more of parallel arrangement
A cylindrical lenses 103a, as shown in Figure 1, the arragement direction of multiple cylindrical lenses 103a is parallel to the cross section in reflecting layer 102,
And the aperture width of each cylindrical lenses 103a is equal to the sum of the width of two pixel ranges on reflecting layer, two pixel regions
Between width it is equal, and the width of each pixel range is that laser projection projects to the whole of a pixel wide on reflecting layer
Several times, two pixel ranges include the first pixel range and the second pixel range, and the first pixel range is for receiving the first light
Signal, the second pixel range is for receiving the second optical signal.It should be noted that Fig. 1 is the vertical view of laser projection screen.
Optionally, the width of each pixel range can project to a pixel on reflecting layer equal to laser projection
Width that is to say that the aperture width of each cylindrical lenses can be equal to the sum of the width of two pixels on reflecting layer.Actually answer
In, the width of each pixel range can also be equal to the width of two or 4 pixels on reflecting layer, the embodiment of the present invention pair
This is not limited.
As shown in Figure 1, the optical signal of laser projection transmitting is from side of the column lens array 103 far from reflecting layer 102
It is incident to reflecting layer 102, it that is to say, incident optical signal is the arrival reflecting layer 102 after the transmission of column lens array 103
On, since the arragement direction of multiple cylindrical lenses in column lens array is parallel to the cross section in reflecting layer, column
Lens array can only change the component of optical signal in the horizontal direction, so that optical signal is focused in the horizontal direction, without changing
The component of optical signal in the vertical direction, therefore column lens array does not interfere with reflecting effect of the reflecting layer to optical signal.
Exemplary, Fig. 3 A are the vertical views that cylindrical lenses provided in an embodiment of the present invention act on optical signal, such as Fig. 3 A institutes
Show, the optical signal component in horizontal direction can change transmission direction to focus after cylindrical lenses 103a；Fig. 3 B are these
The side view that the cylindrical lenses that inventive embodiments provide act on optical signal, as shown in Figure 3B, the optical signal point on vertical direction
Amount will not change transmission direction after cylindrical lenses 103a.
Fig. 4 A are that laser projection screen provided in an embodiment of the present invention is imitated what the optical signal of single pixel point was reflected
True index path, Fig. 4 B are the outgoing light signal energy distribution maps of single pixel point provided in an embodiment of the present invention, and Fig. 4 C are this hairs
The outgoing optical signal for the single pixel point that bright embodiment provides reflected via laser projection screen after energy profile, from Fig. 4 A
The optical signal of single pixel point is can be seen that after the reflection by laser projection screen to Fig. 4 C, and optical signal realizes larger
The diverging of angle.
Fig. 5 A are that laser projection screen provided in an embodiment of the present invention is imitated what the optical signal of multiple pixels was reflected
True index path illustrates, Fig. 5 B and Fig. 5 C are this respectively so that multiple pixel includes three pixels as an example in fig. 5
The image distribution schematic diagram that is formed in different location of outgoing optical signal for multiple pixels that inventive embodiments provide, from Fig. 5 B with
In Fig. 5 C as can be seen that the display content of different zones in the image formed there are certain difference, therefore, between two
Gap can make the pixel watched, and there are small differences, to reach the display effect of bore hole 3D.
Optionally, each cylindrical lenses can be used for existing the optical signal difference focal imaging of corresponding two pixel ranges
Two positions of curved surface, and corresponding optical signal is divergent by two positions of curved surface.
Optionally, above-mentioned two position can be centrosymmetric using the center of curved surface as symmetric points, so that left eye
The optical signal quantity that optical signal quantity and the right eye received receives is identical, to improve the viewing experience of user.
Exemplary, Fig. 6 is a kind of setting schematic diagram of column lens array provided in an embodiment of the present invention, as shown in fig. 6,
Each cylindrical lenses 103a is correspondingly arranged with two pixel ranges on reflecting layer respectively, that is to say, each cylindrical lenses are anti-
The orthographic projection penetrated on layer covers two pixel ranges in the direction of the width.Where it is assumed that corresponding two pictures of each cylindrical lenses
Plain section includes the first pixel range M1 and the second pixel range M2.
Optionally, the mode that optical signal is emitted according to laser projection is different, and laser projection screen receives the side of optical signal
Formula is also different, and the embodiment of the present invention is illustrated in following two modes as an example：
First way, laser projection screen can be used for receiving the first optical signal and that laser projection emits simultaneously
Two optical signals, wherein the first pixel range receives the first optical signal and shows image corresponding with the first optical signal, the second pixel
Section receives the second optical signal and shows image corresponding with the second optical signal.
Exemplary, the transmission schematic diagram of optical signal is referring to Fig. 6, by the eye distance between two, the first pixel range M1's
Optical signal is mainly transmitted to left eye Leye after the diverging of the curved surface of cylindrical lenses 103a, the light letter of the second pixel range M2
Number after the diverging of the curved surface of cylindrical lenses 103a mainly to right eye Reye transmit, due to the first pixel range M1 and second
The optical signal that pixel range M2 is received is different, therefore right and left eyes can be made to receive different types of optical signal, to reach
The display effect of bore hole 3D.
The second way, laser projection screen can be used for receiving the first optical signal and the of laser projection alternate emission
Two optical signals, and alternately it is emitted the first optical signal and the second optical signal.
Wherein, laser projection that is to say to the first optical signal of laser projection screen alternate emission and the second optical signal, swash
Light projector projects the corresponding image of the first optical signal and the corresponding image of the second optical signal, example to laser projection screen mistake frame
Such as, former frame emits the corresponding image of the first optical signal, and next frame emits the corresponding image of the second optical signal, can by by
The image picture characteristic of human eye, reaches the display effect of bore hole 3D.
It should be noted that in the second way, the number of image frames that laser projection need to be projected to laser projection screen is
Need twice of the number of image frames projected to laser projection screen in first way, and the laser projection screen that human eye is watched
Resolution ratio is also twice of first way, be that is to say, will not be sacrificial when realizing bore hole 3D display function using the second way
The display resolution of domestic animal screen can further increase the viewing experience of user.
Optionally, above-mentioned first optical signal is left eye signal, then the second optical signal is right eye signal, alternatively, the first light is believed
Number be right eye signal, then the second optical signal be left eye signal.Exemplary, left eye signal and right eye signal can be from different visions
The signal for the image that angle shot obtains.
In conclusion laser projection screen provided in an embodiment of the present invention, the optical signal of laser projection transmitting passes through column
Reach reflecting layer after shape lens array, optical signal is reflexed to column lens array by reflecting layer, and column lens array is by optical signal
Optical signal after focal imaging is divergent by focal imaging on the curved surface of column lens array, and by curved surface, and realizing will
The picture of each pixel diffuses to all directions.Since each cylindrical lenses correspond to two pixel ranges, by between human eye
Gap, and by the curved surface differential disperse function of cylindrical lenses, two light for being respectively received different pixels section letters can be made
Number, since the optical signal that two pixel ranges receive is different, the corresponding optical signal of pixel range that two observation arrives
Difference, to realize laser projection system bore hole 3D display function, improve the flexibility of 3D display, and be not necessarily to user
Polaroid glasses are worn, compared with the relevant technologies, the brightness fidelity of laser projection system provided in an embodiment of the present invention is higher, 3D
The display effect of display is preferable.
Optionally, column lens array provided in an embodiment of the present invention can be by polymethyl methacrylate (English：
polymethyl methacrylate；Referred to as：PMMA) material manufactures the column for obtaining, manufacturing by injection molding or heat pressing process
The intensity of lens array is higher, and material cost is relatively low and manufacturing process is simple.
It should be noted that in order to ensure the structural stability of laser projection screen, column lens array and reflecting layer it
Between be provided with filled media.Optionally, it can be filled with light-sensitive emulsion between reflecting layer and column lens array, made using light-sensitive emulsion
Laser projection screen is enabled to have certain while ensureing the structural stability of laser projection screen for filled media
Temperature tolerance and lower light decay rate.
In order to realize the display effect of preferable bore hole 3D, need to carry out numerical computations to the face molded dimension of cylindrical lenses,
Face type rise formula may be used in the face shape parameter model of cylindrical lenses：Wherein, C is curvature
The inverse of radius, k are circular cone coefficient, and R is the aperture width of cylindrical lenses.In order to reduce the design and difficult processing of cylindrical lenses
Degree, may be used standard spherical surface, you can to take k=0 herein.
Fig. 7 is the ray tracing schematic diagram of cylindrical lenses provided in an embodiment of the present invention, for the ease of schematically illustrate, is such as schemed
Shown in 7, light is illustrated by the process transmitted in cylindrical lenses after reflective surface using another symmetrical cylindrical lenses.According to mould
Type design requirement, it is assumed that angle of incident light a (a is incident ray and horizontal angle) is it is known that need to optimize to set
The face shape parameter of meter includes：The radius of curvature r (r=1/C) of cylindrical lenses, the center thickness L and cylindrical lenses of cylindrical lenses
Aperture width R, these face shape parameters are calculated according to program optimization, and in initial phase, each face shape parameter is equal
Possesses initial value, i.e., these face shape parameters can be considered known quantity in calculating process.
Further, with reference to figure 7, it is assumed that air refraction n1, the refractive index of cylindrical lenses are n2, cylindrical lenses with it is anti-
The refractive index for penetrating the medium between layer is n3, as follows to the specific calculating process of the face molded dimension of cylindrical lenses：
1, incident ray tangent slope at incidence point on the curved surface of cylindrical lenses is calculated
2, the slope of normal at incidence point is calculated
3, the normal direction at incidence point is extended and is intersected with horizontal line, tanm=K ' can be obtained, thus can be calculated
Normal at incidence point and horizontal angle m：
4, according to the geometrical relationship of figure, incident angle c=m-a of the light on curved surface can be calculated；
5, according to snell law：Light after being reflected on curved surface can be calculated in n1sinc=n2sind
The angle d of transmission direction and normal；
6, according to the geometrical relationship of figure, angle e=m-d can be calculated；
7, according to snell law：Light can be calculated from the angle of emergence in cylindrical lenses in n2sine=n3sinf
Spend f；
8, when light is reflected back cylindrical lenses from reflecting layer, further according to snell law：N3sinf=n2sing, can be with
It is calculated finally by reflection light direction and the horizontal angle g on the curved surface of reflective surface to cylindrical lenses, it is practical
In, angle g is equal with angle e.
Optionally, column lens array and the space D in reflecting layer meet：Wherein, h2 is laser projection
The optical signal of transmitting after a certain cylindrical lenses in column lens array, eye point on a certain cylindrical lenses with should
Vertical range between the optical axis of a certain cylindrical lenses, f are folder of the optical signal from the direction that the eye point is emitted and horizontal direction
Angle, h3 are when being again introduced into a certain cylindrical lenses after optical signal is reflected via reflecting layer, and optical signal is in a certain cylindrical lenses
On incidence point and optical axis between vertical range.
It should be noted that the process for calculating column lens array and the interval D in reflecting layer is as follows：
With reference to figure 7, it is assumed that height of incidence of the incident ray on the curved surface of cylindrical lenses is h1, and light is on cylindrical lenses
Incidence point and eye point between difference in height be s, the vertical range between eye point and optical axis of the light on cylindrical lenses
It is vertical between the incidence point and optical axis of reflection light when the light after being reflected by reflecting layer is again introduced into cylindrical lenses for h2
Distance is h3, and the thickness of cylindrical lenses is L.Then：
Rise of the incident ray on the curved surface of cylindrical lenses is Z (h1), between incidence point and the bottom surface of cylindrical lenses
Horizontal distance q=L-Z (h1)；Then s=qtane, h2=h1-s, h3=Ltang；It follows that column lens array and reflection
The interval of layer：
It, can be by constantly adjusting face shape parameter and programming meter during the actual optimization of the face shape parameter of cylindrical lenses
Calculation obtains the numerical value such as above-mentioned all angles and spacing distance, with the face shape parameter that determination is final.
It is exemplary, it is assumed that air refraction n1=1, column lens array are made of PMMA materials, the refraction of cylindrical lenses
Rate n2=1.4918, the filled media between reflecting layer and column lens array are light-sensitive emulsion, the refractive index n3=of light-sensitive emulsion
1.55, it is final excellent when the size of laser projection screen is 100 cun, and the pixel resolution of laser projection screen is 4096*2160
Change obtained face shape parameter to meet：
The aperture width of cylindrical lenses is 1.60~1.64 millimeters；The center thickness of cylindrical lenses is 1.53~1.55 millis
Rice；The radius of curvature of cylindrical lenses is 64.35~64.36 millimeters；Column lens array and the spacing in reflecting layer be 8.62~
8.72 millimeter.
Optionally, Fig. 8 is the structural schematic diagram of another laser projection screen 10 provided in an embodiment of the present invention, and Fig. 8 is
The side view of laser projection screen, as shown in figure 8, reflecting layer 102 can be Fresnel reflection layer, Fresnel reflection layer 102 has
There is the reflecting surface 102a being oppositely arranged and non-reflecting surface 102b, light absorbent can be provided on non-reflecting surface 102b.Wherein, may be used
Anti-reflection film layer to be arranged on non-reflecting surface, alternatively, black matrix material etc. can also be arranged on non-reflecting surface, the present invention is implemented
Example does not limit the type of light absorbent.
It should be noted that light absorbent is arranged on the non-reflecting surface of Fresnel reflection layer, as shown in figure 8, can subtract
Influences of the subenvironment light λ to Projection Display, the ability for making laser projection screen have certain environment resistant light interference, is swashed with improving
The display effect of light projection screen.
Optionally, in embodiments of the present invention, Fresnel reflection layer may include multiple micro-structures, and multiple micro-structure is in
Arc-shaped arrangement.Wherein, the concave surface of arc-shaped micro-structure is towards laser projection, to cater to the radial of laser projection outgoing
Light, realize the high-efficiency reflective of light.
In practical application, when using the column lens array arranged in the plane, the marginal portion of laser projection screen
3D perceptions it is slightly worse, in order to further increase bore hole 3D perceptions, as shown in figure 9, optional substrate supports layer 101,102 and of reflecting layer
Column lens array 103 is concave curved surface structure, and the curvature of substrate supports layer, reflecting layer and column lens array is homogeneous
Together.
In conclusion laser projection screen provided in an embodiment of the present invention, the optical signal of laser projection transmitting passes through column
Reach reflecting layer after shape lens array, optical signal is reflexed to column lens array by reflecting layer, and column lens array is by optical signal
Optical signal after focal imaging is divergent by focal imaging on the curved surface of column lens array, and by curved surface, and realizing will
The picture of each pixel diffuses to all directions.Since each cylindrical lenses correspond to two pixel ranges, by between human eye
Gap, and by the curved surface differential disperse function of cylindrical lenses, two light for being respectively received different pixels section letters can be made
Number, since the optical signal that two pixel ranges receive is different, the corresponding optical signal of pixel range that two observation arrives
Difference, to realize laser projection system bore hole 3D display function, improve the flexibility of 3D display, and be not necessarily to user
Polaroid glasses are worn, compared with the relevant technologies, the brightness fidelity of laser projection system provided in an embodiment of the present invention is higher, 3D
The display effect of display is preferable.
An embodiment of the present invention provides a kind of laser projection system, which includes laser projection and such as schemes
1, Fig. 8 or shown in Fig. 9 laser projection screens；
Laser projection is used to emit optical signal to laser projection screen.
Exemplary, Figure 10 is a kind of structural schematic diagram of laser projection system provided in an embodiment of the present invention, such as Figure 10 institutes
Show, which may include laser projection 00 and laser projection screen as shown in Figure 1.
It should be noted that laser projection system provided in an embodiment of the present invention, is referred to as laser television.
Optionally, laser projection can be used for laser projection screen while emit the first optical signal and the second light letter
Number, the first optical signal is used to show the image in the first pixel range, and the second optical signal is for showing in the second pixel range
Image, the first optical signal are different from the second optical signal.
Optionally, laser projection can be also used for believing to the first optical signal of laser projection screen alternate emission and the second light
Number, the first optical signal is different from the second optical signal.
In conclusion laser projection system provided in an embodiment of the present invention, the optical signal of laser projection transmitting passes through column
Reach reflecting layer after shape lens array, optical signal is reflexed to column lens array by reflecting layer, and column lens array is by optical signal
Optical signal after focal imaging is divergent by focal imaging on the curved surface of column lens array, and by curved surface, and realizing will
The picture of each pixel diffuses to all directions.Since each cylindrical lenses correspond to two pixel ranges, by between human eye
Gap, and by the curved surface differential disperse function of cylindrical lenses, two light for being respectively received different pixels section letters can be made
Number, since the optical signal that two pixel ranges receive is different, the corresponding optical signal of pixel range that two observation arrives
Difference, to realize laser projection system bore hole 3D display function, improve the flexibility of 3D display, and be not necessarily to user
Polaroid glasses are worn, compared with the relevant technologies, the brightness fidelity of laser projection system provided in an embodiment of the present invention is higher, 3D
The display effect of display is preferable.
The foregoing is merely the present invention alternative embodiment, be not intended to limit the invention, it is all the present invention spirit and
Within principle, any modification, equivalent replacement, improvement and so on should all be included in the protection scope of the present invention.
Claims (14)
1. a kind of laser projection screen, which is characterized in that the laser projection screen includes substrate supports layer, is arranged in the lining
Reflecting layer on the supporting layer of bottom, and be arranged in column lens array of the reflecting layer far from substrate supports layer side；
The reflecting layer is used to the optical signal that laser projection emits reflexing to the column lens array；
The optical signal focal imaging that the column lens array is used to reflect in the reflecting layer is in the column lens array
On curved surface, and the optical signal after focal imaging is divergent by the curved surface；
Wherein, the column lens array includes multiple cylindrical lenses of parallel arrangement, the arrangement side of the multiple cylindrical lenses
To the cross section for being parallel to the reflecting layer, and the aperture width of each cylindrical lenses is equal to two on the reflecting layer
The width of the sum of width of pixel range, described two pixel ranges is equal, and the width of each pixel range is described
Laser projection projects to the integral multiple of the width of a pixel on the reflecting layer, and described two pixel ranges include first
Pixel range and the second pixel range, first pixel range are used for receiving the first optical signal, second pixel range
In receiving the second optical signal, first optical signal is different from second optical signal.
2. laser projection screen according to claim 1, which is characterized in that
The width of each pixel range is equal to the width that the laser projection projects to a pixel on the reflecting layer
Degree.
3. laser projection screen according to claim 1, which is characterized in that
Each cylindrical lenses are used to the optical signal of corresponding two pixel ranges distinguishing focal imaging in the curved surface
Two positions, and corresponding optical signal is divergent by two positions of the curved surface.
4. laser projection screen according to claim 3, which is characterized in that
Described two positions are centrosymmetric using the center of the curved surface as symmetric points.
5. laser projection screen according to claim 1, which is characterized in that the column lens array and the reflecting layer
Space D meet：
Wherein, h2 is the optical signal of laser projection transmitting by a certain cylindrical lenses in the column lens array
Afterwards, the vertical range between the eye point on a certain cylindrical lenses and the optical axis of a certain cylindrical lenses, f are described
For optical signal from the angle in the direction that the eye point is emitted and horizontal direction, h3 is that the optical signal is reflected via the reflecting layer
After when being again introduced into a certain cylindrical lenses, incidence point of the optical signal on a certain cylindrical lenses and the optical axis
Between vertical range.
6. laser projection screen according to claim 5, which is characterized in that
The column lens array is manufactured to obtain by polymethyl methacrylate materials by injection molding or heat pressing process；
Light-sensitive emulsion is filled between the reflecting layer and the column lens array.
7. laser projection screen according to claim 6, which is characterized in that the size of the laser projection screen is 100
Very little, the pixel resolution of the laser projection screen is 4096*2160,
The aperture width of the cylindrical lenses is 1.60~1.64 millimeters；
The center thickness of the cylindrical lenses is 1.53~1.55 millimeters；
The radius of curvature of the cylindrical lenses is 64.35~64.36 millimeters；
The column lens array and the spacing in the reflecting layer are 8.62~8.72 millimeters.
8. laser projection screen according to any one of claims 1 to 7, which is characterized in that
First optical signal and described second that the laser projection screen is used to receive the laser projection while transmitting
Optical signal.
9. laser projection screen according to any one of claims 1 to 7, which is characterized in that
The laser projection screen is used to receive first optical signal and described second of the laser projection alternate emission
Optical signal, and alternately it is emitted first optical signal and second optical signal.
10. laser projection screen according to claim 1, which is characterized in that the reflecting layer is Fresnel reflection layer, institute
Stating Fresnel reflection layer has the reflecting surface and non-reflecting surface being oppositely arranged, and light absorbent is provided on the non-reflecting surface.
11. laser projection screen according to claim 1, which is characterized in that
The substrate supports layer, the reflecting layer and the column lens array are concave curved surface structure, and the substrate branch
Support layer, the reflecting layer and the column lens array curvature all same.
12. a kind of laser projection system, which is characterized in that the laser projection system includes laser projection and such as claim
1 to 11 any laser projection screen；
The laser projection is used to emit optical signal to the laser projection screen.
13. laser projection system according to claim 12, which is characterized in that
The laser projection is used to emit the first optical signal and the second optical signal simultaneously to the laser projection screen, and described the
One optical signal is used to show the image in first pixel range, and second optical signal is for showing second pixel region
Between in image, first optical signal is different from second optical signal.
14. laser projection system according to claim 12, which is characterized in that
The laser projection is used for first optical signal of laser projection screen alternate emission and the second optical signal, and described the
One optical signal is different from second optical signal.
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| CN110865509A (en) * | 2018-08-27 | 2020-03-06 | 深圳光峰科技股份有限公司 | Projection screen and manufacturing method thereof |
| CN113031287A (en) * | 2019-12-09 | 2021-06-25 | 觉芯电子(无锡)有限公司 | Optical integrator, speckle suppression device and laser display system thereof |
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| CN108388075B (en) | 2021-02-09 |
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