CN110133956A - A kind of mosaic display screen, display device - Google Patents
A kind of mosaic display screen, display device Download PDFInfo
- Publication number
- CN110133956A CN110133956A CN201810133273.1A CN201810133273A CN110133956A CN 110133956 A CN110133956 A CN 110133956A CN 201810133273 A CN201810133273 A CN 201810133273A CN 110133956 A CN110133956 A CN 110133956A
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- light
- isosceles trapezoid
- display screen
- display
- mosaic
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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
- 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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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
- Overhead Projectors And Projection Screens (AREA)
Abstract
The disclosure discloses a kind of mosaic display screen and display device, comprising: at least two pieces of display units mutually spliced, there are pieces between adjacent display cell；It is equipped with optical element in edge joint position, the light of directive piece is incident on optical element；Optical element is used to change the exit direction of light, and the angle between the exit direction of light and display unit place plane is made to be greater than predetermined angle.Technical solution provided by the invention, by the edge joint position in adjacent display cell, optical element is set, the light of directive piece is changed into direction, keep emergent ray as vertical with plane where display unit as possible, to prevent light from impacting after the spilling of the side of display unit to the display picture of adjacent display cell, due to without pasting black pad pasting in the side of display unit, because without forming black line in edge joint position, it overcomes prior art mosaic display screen adjacent display cell picture and shows discontinuous problem, improve the image display quality of mosaic display screen.
Description
Technical field
This disclosure relates to field of display technology, in particular to a kind of mosaic display screen, display device.
Background technique
Existing DLP (Digital Light Processing, digital light processing) rear-projection large screen splicing technology, because of its exquisiteness
Display effect, highlighted, energy conservation, eyeshield, small piece the advantages that, mostly applied to high-end application scenarios such as command post, monitoring rooms,
Size is larger；It is all that muti-piece display unit is spliced, this just leads but because it is influenced by factors such as optical characteristics, screen techniques
It has caused the problem of objective existence manages piece between adjacent display cell.
Although the splicing piece of DLP rear-projection at present can be accomplished within 0.5mm substantially, in view of the factors limit such as expand with heat and contract with cold
System, physics piece cannot be completely eliminated, this will lead to and visually destroys the continuity that adjacent image picture is shown, influence display effect
Fruit.If physics piece is not handled, optical path meeting shows that picture is made as shown in Figure 1, have faint light 103 is spuious to appear, to the other side
At influence；Way currently on the market is mostly 101 edge of display unit patch black pad pasting, first is that play the role of fixed mask,
Second is that preventing light from overflowing from 101 side of display unit；But after being pasted with black pad pasting, since the light of directive piece 102 is hacked
Color pad pasting absorbs, and just forms the black line that can not be eliminated at piece 102.
Have above-mentioned it is found that the piece of existing mosaic display screen is unable to complete elimination, forming one in edge joint position can not eliminate
Black line, destroy the continuity that adjacent display cell picture is shown.
Summary of the invention
It is unable to complete elimination in order to solve the piece of mosaic display screen present in the relevant technologies, forms one in edge joint position
The black line that can not be eliminated destroys the continuity problem that adjacent display cell picture is shown, the present invention provides a kind of splicing is aobvious
Display screen.
On the one hand, the present invention provides a kind of mosaic display screens, comprising:
At least two pieces of display units mutually spliced, there are pieces between adjacent display cell；
It is equipped with optical element in the edge joint position, the light of piece described in directive is incident on the optical element；
The optical element is used to change the exit direction of the light, makes the exit direction and the display of the light
Angle where unit between plane is greater than predetermined angle.
In a kind of exemplary embodiment, the optical element is the prism of symmetrical configuration, and the plane of symmetry of the prism is flat
Row is in the Mosaic face of the display unit.
In a kind of exemplary embodiment, the optical element is isosceles trapezoid prism, and the light of directive edge joint position reaches
Positioned at the isosceles trapezoid prism of the edge joint position, successively by the refraction of the isosceles trapezoid prism upper bottom surface, the total reflection of waist
With the refraction of bottom surface, change the exit direction of the light.
In a kind of exemplary embodiment, it is single that the upper bottom surface and bottom surface of the isosceles trapezoid prism are parallel to the display
Plane where first.
In a kind of exemplary embodiment, the apex angle α of the isosceles trapezoid prism meets formula
Wherein, n is the refractive index of the isosceles trapezoid prism, θxFor directive edge joint position
The light and the isosceles trapezoid prism upper bottom surface angle.
In a kind of exemplary embodiment, the base angle γ of the isosceles trapezoid prism meets formula
So that the exit direction of the light is vertical with plane where the display unit.
Wherein, n is the refractive index of the isosceles trapezoid prism, θxFor the light and isosceles ladder of directive edge joint position
The angle of shape prism upper bottom surface.
In a kind of exemplary embodiment, the bottom surface of the isosceles trapezoid prism is filled with diffusing reflection substance.
In a kind of exemplary embodiment, the bottom surface width of the isosceles trapezoid prism is less than the width of the piece.
A kind of folder in exemplary embodiment, where the exit direction of the light and the display unit between plane
Angle is more than or equal to 78 °.
The present invention also provides a kind of display device, the display device includes projector, back projection box body and above-mentioned
It anticipates a kind of mosaic display screen.
The technical scheme provided by this disclosed embodiment can include the following benefits:
Technical solution provided by the invention is arranged optical element by the edge joint position in adjacent display cell, directive is spelled
The light of seam changes direction, and it is as vertical with plane where display unit as possible to enable emergent ray, to prevent light from aobvious
Show and the display picture of adjacent display cell is impacted after the side of unit is overflowed, due to without glutinous in the side of display unit
Black pad pasting is pasted, because overcoming prior art mosaic display screen adjacent display cell picture without forming black line in edge joint position
It shows discontinuous problem, improves the image display quality of mosaic display screen.
It should be understood that the above general description and the following detailed description are merely exemplary, this can not be limited
It is open.
Detailed description of the invention
The drawings herein are incorporated into the specification and forms part of this specification, and shows and meets implementation of the invention
Example, and in specification together principle for explaining the present invention.
Fig. 1 is that there are the schematic illustrations of light leakage for piece between display unit in the prior art；
Fig. 2 is a kind of structural schematic diagram of the mosaic display screen provided according to exemplary embodiment；
Fig. 3 is the structural schematic diagram that display unit is shown according to an exemplary embodiment；
Fig. 4 is a kind of structural schematic diagram of the mosaic display screen shown according to another exemplary embodiment；
Fig. 5 is a kind of model schematic of mosaic display screen shown according to an exemplary embodiment；
Fig. 6 is a kind of light path principle schematic diagram of mosaic display screen shown according to an exemplary embodiment；
Fig. 7 is the partial enlarged view in region 501 in Fig. 6 corresponding embodiment.
Specific embodiment
Here will the description is performed on the exemplary embodiment in detail, the example is illustrated in the accompanying drawings.Following description is related to
When attached drawing, unless otherwise indicated, the same numbers in different drawings indicate the same or similar elements.Following exemplary embodiment
Described in embodiment do not represent all embodiments consistented with the present invention.On the contrary, they be only with it is such as appended
The example of device and method being described in detail in claims, some aspects of the invention are consistent.
As shown in Fig. 2, the mosaic display screen includes: at least two pieces and mutually spells the present invention provides a kind of mosaic display screen
The display unit 101 connect, there are pieces 102 between adjacent display cell 101；Optical element is equipped at the piece 102
202, the light 201 of piece 102 described in directive is incident on the optical element 202；The optical element 202 is for changing institute
The exit direction for stating light 201 makes the folder between the 101 place plane of exit direction and the display unit of the light 201
Angle is greater than predetermined angle.
It is to be understood that display unit 101 belongs to one of screen of mosaic display screen, mosaic display screen is by multiple
Such screen is closely spliced.There are a piece 102 between two neighboring display unit 101, which can be reality
The physical clearance on border, it is also possible to which interval is formed by screen connecting material.
By taking projecting cell splicing display device as an example, each projecting cell is by projector, back projection box body and display unit 101
It constitutes, the display unit 101 of multiple projecting cells is by being spliced to form mosaic display screen.In other words, spelling provided by the invention
Connecing display screen can be used as the mosaic display screen of projecting cell splicing display device.Wherein, display unit 101 can be Fresnel light
Screen is learned, basic structure and optical path are as shown in Figure 3.The display unit 101 includes Fresnel layer 301, cylindrical lens layer 302, light
After Fresnel layer 301, will form one group of parallel rays and be incident on cylindrical lens layer 302, after scattered by cylindrical lens layer 302
Come, forms the image in 101 front of display unit.
Mosaic display screen commonly used in needing to carry out the occasion of large-scale display, such as airport, railway station, sports tournament and
Large size exhibition.In these occasions, need using the very big display screen of size to provide corresponding information apart from far people.
It should be noted that optical element 202, which can be multiple optical devices, combines the optical module to be formed, such as by anti-
Penetrate mirror, the optical module that prism is formed by combining.Optical element 202 is also possible to an optical device, such as prism.Optics member
Part 202 is arranged at the piece 102 between adjacent display cell 101.The design of optical element 202, which need to only be met, makes directive
Light 201 at piece 102 is incident on the optical element 202, by the effect of the optical element 202, changes the light
201 exit direction enables 201 exit direction of light vertical screen to be as far as possible emitted.
That is, the folder between 101 place plane of the beam projecting direction by the optical element 202 and display unit
It angle will be close to 90 °.In a kind of exemplary embodiment, between the 101 place plane of exit direction and display unit of light 201
Angle is more than or equal to 78 °.In other words, the angle of emergence β of light 201 wants≤12 ° after optical element 202.
Light is arranged by the edge joint position in adjacent display cell in the technical solution that the above exemplary embodiments of the present invention provide
Element is learned, the light of directive piece is changed into direction, keeps emergent ray as vertical with plane where display unit as possible, from
And the display picture of adjacent display cell is impacted after preventing light from overflowing from the side of display unit, due to without aobvious
Show that black pad pasting is pasted in the side of unit, because overcoming prior art mosaic display screen phase without forming black line in edge joint position
Adjacent display unit picture shows discontinuous problem, improves the image display quality of mosaic display screen.
On the basis of the above exemplary embodiments, the optical element 202 is the prism of symmetrical configuration, the prism
The plane of symmetry is parallel to the Mosaic face of the display unit 101.
It is to be understood that the interface between Mosaic face, that is, adjacent display cell 101, the setting structure at piece 102
Symmetrical prism, and the prism plane of symmetry is made to be parallel to the Mosaic face of display unit 101, the light being finally emitted can be made symmetrically to divide
Cloth avoids display brightness uneven.Wherein, the prism of the symmetrical configuration can be isosceles trapezoid prism 401.
In a kind of exemplary embodiment, which can be isosceles trapezoid prism 401, at directive piece 102
Light 201 reach be located at piece 102 at isosceles trapezoid prism 401, successively pass through 401 upper bottom surface of isosceles trapezoid prism folding
It penetrates, the refraction of the total reflection of waist and bottom surface, changes the exit direction of light.
As shown in Figure 4,5, 6, isosceles trapezoid prism 401 is set at piece 102.Preferably, the isosceles trapezoid prism
401 upper bottom surface and bottom surface is parallel to 101 place plane of display unit.Namely it is parallel to the display surface of display screen.To
It projects light symmetrically from isosceles trapezoid prism 401, improves display brightness uniformity.Light 201 at directive piece 102
It is divided into two kinds, the first is the upper bottom surface that isosceles trapezoid prism 401 has not been emitted directly toward by the refraction of display unit 101,
As shown in Figure 4.It is for second the isosceles trapezoid prism 401 after the refraction of display unit 101 at directive piece 102, such as Fig. 6
It is shown.Referring to shown in 4,6, the light 201 at directive piece 102 reaches the isosceles trapezoid prism 401 being located at piece 102, according to
The secondary refraction by the refraction of 401 upper bottom surface of isosceles trapezoid prism, the total reflection of waist and bottom surface, finally from isosceles trapezoid prism
401 bottom surface projects, and changes the exit direction of original incident light, keeps exit direction as vertical with display screen as possible.
In a kind of exemplary embodiment, the apex angle α of the isosceles trapezoid prism 401 meets formula
Wherein, n is the refractive index of the isosceles trapezoid prism 401, θxFor directive piece
The angle of light 201 and 401 upper bottom surface of isosceles trapezoid prism at 102.
As shown in figure 4, the light in 101 marginal position of display unit is rolled in the upper bottom surface of isosceles trapezoid prism 401
The inside for entering isosceles trapezoid prism 401 after penetrating, because incidence angle is more than or equal to critical angle on the waist of isosceles trapezoid prism 401,
It is totally reflected on the waist of isosceles trapezoid prism 401.Reflection light is approximately perpendicular to the bottom surface of ground isosceles trapezoid prism 401
It projects.Refraction and total reflection principle using light can calculate the apex angle range of isosceles trapezoid prism 401, make at piece 102
Full of the light approximately perpendicular to screen.
Assuming that the refractive index of isosceles trapezoid prism 401 is n (1.5~1.95), prism bottom and top two corners need to meet following condition:
Top angle (i.e. apex angle) is α, α=θx′+θAAnd 90 ° of α >, (1)
Lower section angle (i.e. base angle) is 90 ° of γ, γ=180 °-α and γ <； (2)
According to the law of refraction, then there is sin θx=nsin θx′ (3)
According to total reflection condition, incidence angle when light 201 is incident on 401 waist of isosceles trapezoid prism should be greater than being equal to
Critical angle is totally reflected at this time.
Then there is θA≥θB(4) it can be obtained by formula (1), (2), (3) and (4),
I.e.
Then
At this point, for the light 201 of directive screen edge, when meeting formula (4), in isosceles trapezoid prism 401
Waist at light be totally reflected, be reflected into 401 bottom surface of isosceles trapezoid prism.It is incident in 401 bottom surface of isosceles trapezoid prism
Angle is θA-γ.According to the law of refraction, light is with a vertical angle theta ' outgoing.When lower section, angle is just met for γ=θAWhen,
Light vertical exit.That is, light is vertical when incidence angle is just equal on the base angle of isosceles trapezoid prism 401 and waist
Outgoing.
In a kind of exemplary embodiment, the base angle γ of the isosceles trapezoid prism 401 meets formula
So that the exit direction of the light 201 and the 101 place plane of display unit are hung down
Directly.Wherein, n is the refractive index of the isosceles trapezoid prism 401, θxFor the light 201 at directive piece 102 and described etc.
The angle of 401 upper bottom surface of waist Dove prism.
It is verified, for the light 201 (0~2cm) apart from 101 edge certain distance of display unit, as shown in Figure 6
After display unit 101 reflects twice at directive piece 102 isosceles trapezoid prism 401 upper bottom surface, wherein Fig. 7 be Fig. 6 in
The partial enlarged view in region 501.As shown in Figure 6,7, meet θ1< θx, sin θ1=n1sinθ1', nsin θ2=sin θ2', because of θ1′+
θ2=90 °, θ3=90 ° of-θ2', then θ3< θx.Again because of sin θ3=n1sinθ3', then θ > θA。
Work as θ3α -90 ° of ' >, light is emitted at this time with the angle on approximately perpendicular bottom edge, i.e. nsin (θ-γ)=sin θΔ′。
θΔ' be emergent ray and 401 bottom surface of isosceles trapezoid prism angle.Work as θ3' < α -90o and θ3At 10 ° of ' <, isosceles trapezoid rib
Mirror 401 is equivalent to parallel flat, and light is with θ3' outgoing.
Therefore, for large screen splicing system, determine that camera lens can determine θ later1And θx.If 101 refractive index of display unit
For n1, θ can be solved by formula3.When isosceles trapezoid prism 401 meets formula (6) and (7), light can be sent out in prism
Raw total reflection, and light is vertical or approximately perpendicular angle is emitted from the bottom surface of isosceles trapezoid prism 401.By reasonably selecting
The material of isosceles trapezoid prism 401 is taken, that is, can determine the refractive index of isosceles trapezoid prism 401, and then obtains isosceles trapezoid prism
401 apex angle and base angle range.
In a kind of exemplary embodiment, if camera lens θx=86 ° and θ1=85 °, 101 optical material of display unit and isosceles
The refractive index of Dove prism 401 is respectively n1=1.4 and n=1.5.
At this point, the light 201 at 101 edge of display unit, By formula (1) and (2) it is found that 90 ° of 401 apex angle α > of isosceles trapezoid prism, base angle
90 ° of γ <.Then θA=α-θx90 ° -41.7 °=48.3 ° > θ of ' >B, light is totally reflected at this time, and apex angle value need to only expire
Foot is greater than 90 degree, according to the specific value of apex angle, can determine the value of θ '.When taking α=112 °, γ=68 ° are fixed according to refraction
Lv Ke get, θ '=3.5 °, bottom surface of the beam projecting direction approximately perpendicular to isosceles trapezoid prism 401.
Light 201 apart from edge certain distance, by the law of refraction, it is known that,
θ2=90 ° of-θ1'=44.6 °.θ2'=arcsin (n1sinθ2)
=arcsin (1.4sin44.6 °)=79.6 °, θ3=10.4 °.θ3'=7.4 °.At this point, because of θ3α -90 ° of ' <, light is with 7.4o
It is emitted from isosceles trapezoid prism 401, bottom surface of the beam projecting direction approximately perpendicular to isosceles trapezoid prism 401.
In a kind of exemplary embodiment, the bottom surface of the isosceles trapezoid prism 401 fills diffusing reflection substance, to make to spell
The optical characteristics stitched at 102 is consistent with the optical characteristics on screen.
It should be noted that as shown in Figure 4,5, 6, the high h of isosceles trapezoid prism 401 is less than the thickness of display unit 101
H, the bottom surface width of isosceles trapezoid prism 401 is less than the width of piece 102, to avoid display screen is damaged when expanding with heat and contract with cold.It is false
If the bottom surface width of isosceles trapezoid prism 401 be 10mm, prism height h, each thickness degree of 0 < h < display unit 101 it
With.
In one embodiment, h can take 2.5mm, when taking α=112 °, when γ=68 °, be closed according to the function of triangle
System, the width that can solve upper bottom surface is 8mm.
On the other hand, the present invention also provides a kind of display device, the display device include projector, back projection box body with
And mosaic display screen described in the above exemplary embodiments.The display device includes multiple projecting cells, each projecting cell packet
Projector, back projection box body and screen are included, the screen of multiple projecting cells is aobvious by being spliced to form splicing described in above-described embodiment
Display screen is equipped with optical element described in the above exemplary embodiments of the present invention between neighboring screens.Display dress provided by the invention
It sets, the black line of mosaic display screen edge joint position can be eliminated, improve the continuity of display picture, display quality is provided.
It should be understood that the present invention is not limited to the precise structure already described above and shown in the accompanying drawings, and
And various modifications and change can executed without departing from the scope.The scope of the present invention is limited only by the attached claims.
Claims (10)
1. a kind of mosaic display screen characterized by comprising
At least two pieces of display units mutually spliced, there are pieces between adjacent display cell；
It is equipped with optical element in the edge joint position, the light of piece described in directive is incident on the optical element；
The optical element is used to change the exit direction of the light, makes the exit direction of the light and the display unit
Angle between the plane of place is greater than predetermined angle.
2. mosaic display screen according to claim 1, which is characterized in that the optical element is the prism of symmetrical configuration,
The plane of symmetry of the prism is parallel to the Mosaic face of the display unit.
3. mosaic display screen according to claim 1, which is characterized in that the optical element is isosceles trapezoid prism, is penetrated
The isosceles trapezoid prism for being located at the edge joint position is reached to the light of edge joint position, successively passes through the isosceles trapezoid prism upper bottom surface
Refraction, the total reflection of waist and the refraction of bottom surface, change the exit direction of the light.
4. mosaic display screen according to claim 3, which is characterized in that the upper bottom surface of the isosceles trapezoid prism and bottom
Face is parallel to plane where the display unit.
5. mosaic display screen according to claim 3, which is characterized in that the apex angle α of the isosceles trapezoid prism meets public
FormulaWherein, n is the refractive index of the isosceles trapezoid prism, θxFor the institute of directive edge joint position
State the angle of light Yu the isosceles trapezoid prism upper bottom surface.
6. mosaic display screen according to claim 3, which is characterized in that the base angle γ of the isosceles trapezoid prism meets public
FormulaSo that the exit direction of the light is vertical with plane where the display unit.
Wherein, n is the refractive index of the isosceles trapezoid prism, θxFor the light and the isosceles trapezoid rib of directive edge joint position
The angle of mirror upper bottom surface.
7. mosaic display screen according to claim 3, which is characterized in that the bottom surface of the isosceles trapezoid prism is filled with
Diffusing reflection substance.
8. mosaic display screen according to claim 3, which is characterized in that the bottom surface width of the isosceles trapezoid prism is small
In the width of the piece.
9. mosaic display screen according to claim 1, which is characterized in that the exit direction of the light and the display are single
Angle where first between plane is more than or equal to 78 °.
10. a kind of display device, which is characterized in that the display device includes projector, back projection box body and claim 1-9
Mosaic display screen described in any one.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810133273.1A CN110133956B (en) | 2018-02-09 | 2018-02-09 | Spliced display screen and display device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810133273.1A CN110133956B (en) | 2018-02-09 | 2018-02-09 | Spliced display screen and display device |
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| CN110133956B CN110133956B (en) | 2021-11-19 |
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| CN110133956B (en) | 2021-11-19 |
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