CN207096671U - Orthographic projection printing opacity projection screen and optical projection system - Google Patents

Abstract

The utility model provides a kind of orthographic projection printing opacity projection screen and optical projection system, is related to projection display technique field.The orthographic projection printing opacity projection screen includes screen base, one side surface of the screen base is arranged at intervals with multiple extinction grizzly bars, the side of the extinction grizzly bar is coated with diffusing reflection layer, and the interval region between multiple extinction grizzly bars in the screen base is provided with transparent area.Relative to prior art, projection screen provided by the utility model makes beholder to see the projected image shown on diffusing reflection layer, and can enough sees the scene after screen back by the transparent area being distributed on screen, and two-way light is not interfere with each other, being perfectly combined for image information display is realized, dual visual enjoyment is provided for beholder.Meanwhile extinction grizzly bar can effectively absorb ambient light and other veiling glares, the anti-light ability of screen is greatly enhanced, improves the contrast of display picture.

Description

Orthographic projection printing opacity projection screen and optical projection system

Technical field

The utility model is related to projection display technique field, in particular to a kind of orthographic projection printing opacity projection screen and Optical projection system.

Background technology

At present, widely used projection screen generally can be divided into the reflective, class of transmission-type two in field of projection display.Its In, reflective to be used to just throw, transmission-type is used for rear-projection.

Reflective projection screen is applied to observer and projector is in the situation of the same side.Display image is thrown by projector It is mapped on reflective projection screen, and finally reflexes in the eye of observer.

Transmissive projection screen is then applied to observer and projector is respectively at the situation of projection screen both sides.Now, The screen is passed through by the light beam on the projector to projection screen of screen side, and incides the sight positioned at screen opposite side In the person's of examining eye.

The projection screen of two kinds of above-mentioned main flows, it can only observe what is shown on projection screen, be projected out by projector Piece image.

However, in stage performance, Window Display or some special occasions, it is necessary to foreground image can be presented, while Can see that the demand of background content is more and more, and existing implementation method be shown with transparent liquid crystal, transparent OLED shows, is unreal Shadow is shown or projecting holographic screen display etc., and these methods can obtain relatively good display effect, still, because its projection is former The limitation of reason, for need high brightness, oversize prospect display picture demand, but never good solution.

Utility model content

The purpose of this utility model is to provide a kind of orthographic projection printing opacity projection screen and optical projection system, and it can effectively change Kind above mentioned problem.

What embodiment of the present utility model was realized in：

In a first aspect, the utility model embodiment provides a kind of orthographic projection printing opacity projection screen, it includes screen base, One side surface of the screen base is arranged at intervals with multiple extinction grizzly bars, and the side of the extinction grizzly bar is coated with diffusing reflection Layer, the interval region between multiple extinction grizzly bars in the screen base is provided with transparent area, and projected light is by the screen The side of curtain base material is incided on the diffusing reflection layer, is reflected and is emitted along the direction away from the screen base, bias light Incided in the screen base by the opposite side of the screen base, transmitted through the transparent area in the screen base, and edge It is emitted with the projected light identical direction reflected.

In the utility model preferred embodiment, the extinction grizzly bar is shaped as linear strip or non-linear strip Shape.

In the utility model preferred embodiment, the cross sectional shape of the extinction grizzly bar is triangle or quadrangle or fan Shape.

In the utility model preferred embodiment, completely or partially coating is described unrestrained for a side surface of the extinction grizzly bar Reflecting layer.

In the utility model preferred embodiment, in the multiple extinction grizzly bar between two adjacent extinction grizzly bars It is spaced identical.

In the utility model preferred embodiment, the transparent area is uniformly arranged in the screen base.

In the utility model preferred embodiment, the side of the extinction grizzly bar is coated with single or multiple lift diffusing reflection Layer.

In the utility model preferred embodiment, the visible-light absorptivity of the extinction grizzly bar is more than or equal to 10%, The visible light transmissivity of the transparent area is more than or equal to 10%.

In the utility model preferred embodiment, the extinction grizzly bar is coated with the side of the diffusing reflection layer and described The angle of screen base is more than or equal to 0 and less than or equal to 70 °, the side of the uncoated diffusing reflection layer of extinction grizzly bar It is more than or equal to 45 ° and less than or equal to 90 ° with the angle of the screen base, the height of the extinction grizzly bar is more than or equal to The width of 0.2 times of extinction grizzly bar.

Second aspect, the utility model embodiment additionally provide a kind of optical projection system, and it includes orthographic projection as described above Printing opacity projection screen and projector, the screen base that the projector is arranged in the orthographic projection printing opacity projection screen are provided with The side of extinction grizzly bar, the projected light sent by the projector are incided on the diffusing reflection layer set on the extinction grizzly bar, Reflected and be emitted along the direction away from the screen base, bias light incides the screen by the opposite side of the screen base On curtain base material, transmit through the transparent area in the screen base, and be emitted along with the projected light identical direction reflected.

The orthographic projection printing opacity projection screen and optical projection system that the utility model embodiment provides, by the one of screen base Side surface is arranged at intervals multiple extinction grizzly bars, and coats diffusing reflection layer in the side of extinction grizzly bar, and in the screen base On multiple extinction grizzly bars between interval region set transparent area, projection screen is divided into the imaging for Projection Display Area and the transparent area for passing through bias light.Wherein, the diffusing reflection layer that extinction grizzly bar side is set can be reflected from projection screen The incident projected light in front；And the bias light of projection screen behind is then by the transparent area set in screen base, with it is anti- The projected light identical direction penetrated is transmitted to the front of screen.Meanwhile the extinction grizzly bar can effectively absorb ambient light and Other veiling glares, greatly strengthen the anti-light ability of screen, improve the contrast of display picture.Compared to the prior art, this reality Beholder is set to see that the diffusing reflection layer on screen is anti-with the orthographic projection printing opacity projection screen and optical projection system of new offer The projected image penetrated, and can enough see the scene after screen back, and projected light and bias light by the transparent area being distributed on screen Two-way light do not interfere with each other, realize being perfectly combined for image information display, dual visual enjoyment provided for beholder, Its structure is simplified, cost is cheap, can be very good solve the demand that large area prospect is shown.

Brief description of the drawings

, below will be to required use in embodiment in order to illustrate more clearly of the technical scheme of the utility model embodiment Accompanying drawing be briefly described, it will be appreciated that the following drawings illustrate only some embodiments of the present utility model, therefore should not be by Regard the restriction to scope as, for those of ordinary skill in the art, on the premise of not paying creative work, may be used also To obtain other related accompanying drawings according to these accompanying drawings.

Fig. 1 is the structural representation for the orthographic projection printing opacity projection screen that the utility model first embodiment provides；

Fig. 2 is the structural representation of the extinction grizzly bar for the linear strip that the utility model first embodiment provides；

Fig. 3 is the structural representation of the extinction grizzly bar for the non-linear strip that the utility model first embodiment provides；

Fig. 4 is the structural representation for second of cross sectional shape extinction grizzly bar that the utility model first embodiment provides；

Fig. 5 is the structural representation for the third cross sectional shape extinction grizzly bar that the utility model first embodiment provides；

Fig. 6 is the structural representation for the 4th kind of cross sectional shape extinction grizzly bar that the utility model first embodiment provides；

Fig. 7 is the structural representation for the 5th kind of cross sectional shape extinction grizzly bar that the utility model first embodiment provides；

Fig. 8 is the structural representation of the extinction grizzly bar for the multiple section combination of shapes that the utility model first embodiment provides Figure；

Fig. 9 is the structural representation that the setting that the utility model first embodiment provides is spaced different extinction grizzly bars；

Figure 10 is that the structure for the screen base that the dorsal part that the utility model first embodiment provides is provided with extinction grizzly bar is shown It is intended to；

Figure 11 is the structural representation for the extinction grizzly bar that the part that the utility model first embodiment provides coats diffusing reflection layer Figure；

Figure 12 is that the structure for the extinction grizzly bar coated with multilayer diffusing reflection layer that the utility model first embodiment provides is shown It is intended to；

Figure 13 is the design parameter schematic diagram for the preferable extinction grizzly bar that the utility model first embodiment provides；

Figure 14 is the structural representation for the optical projection system that the utility model second embodiment provides.

Icon：100- screen bases；200- extinction grizzly bars；220- light-absorption layers；300- diffusing reflection layers；400- transparent areas； 500- projectors；1000- orthographic projection printing opacity projection screens；2000- optical projection systems.

Embodiment

It is new below in conjunction with this practicality to make the purpose, technical scheme and advantage of the utility model embodiment clearer Accompanying drawing in type embodiment, the technical scheme in the embodiment of the utility model is clearly and completely described, it is clear that is retouched The embodiment stated is the utility model part of the embodiment, rather than whole embodiments.Generally here described in accompanying drawing and The component of the utility model embodiment shown can be configured to arrange and design with a variety of.

Therefore, the detailed description of the embodiment of the present utility model to providing in the accompanying drawings is not intended to limit requirement below The scope of the utility model of protection, but it is merely representative of selected embodiment of the present utility model.Based in the utility model Embodiment, the every other embodiment that those of ordinary skill in the art are obtained under the premise of creative work is not made, all Belong to the scope of the utility model protection.

It should be noted that：Similar label and letter represents similar terms in following accompanying drawing, therefore, once a certain Xiang Yi It is defined, then it further need not be defined and explained in subsequent accompanying drawing in individual accompanying drawing.

, it is necessary to explanation in description of the present utility model, term " in ", " on ", " under ", "left", "right", " interior ", The orientation or position relationship of instructions such as " outer " are or the utility model product based on orientation shown in the drawings or position relationship The orientation or position relationship usually put during use, it is for only for ease of description the utility model and simplifies description, without referring to Show or imply that the device of meaning or element there must be specific orientation, with specific azimuth configuration and operation, therefore can not manage Solve as to limitation of the present utility model.In addition, term " first ", " second ", " the 3rd " etc. are only used for distinguishing description, and can not manage Solve to indicate or implying relative importance.

In addition, the term such as term " level ", " vertical ", " pendency " is not offered as requiring part abswolute level or pendency, and It is to be slightly tilted.Such as " level " only refers to that its direction is more horizontal with respect to for " vertical ", is not to represent the structure Must be fully horizontal, but can be slightly tilted.

In description of the present utility model, it is also necessary to which explanation, unless otherwise clearly defined and limited, term " are set Put ", " installation ", " connected ", " connection " should be interpreted broadly, for example, it may be fixedly connected or be detachably connected, Or it is integrally connected；Can be mechanical connection or electrical connection；Can be joined directly together, intermediary can also be passed through It is indirectly connected, can is the connection of two element internals.For the ordinary skill in the art, can be managed with concrete condition Solve concrete meaning of the above-mentioned term in the utility model.

In addition, the term such as " input ", " output ", " feedback ", " formation " is understood as describing a kind of optics, electricity change Or optics, electricity processing.As " is formationed " only refer to optical signal or electric signal by the element, instrument or device afterwards there occurs Change optically or electrically so that the optical signal or the electric signal are processed, and then are obtained and implemented technical scheme Or the signal required for solution technical problem.

In specific embodiment of the utility model accompanying drawing, for more preferable, clearer description orthographic projection printing opacity projection The operation principle of each element in screen and optical projection system, the annexation of each several part in described device is showed, it is simply obvious to distinguish Relative position relation between each element, can not be formed to the optical path direction in element or structure, the order of connection and each portion The restriction of separation structure size, size, shape.

First embodiment

Fig. 1 is refer to, present embodiments provides a kind of orthographic projection printing opacity projection screen 1000, it includes screen base 100, One side surface of the screen base 100 is arranged at intervals with multiple extinction grizzly bars 200, the side coating of the extinction grizzly bar 200 There is a diffusing reflection layer 300, the interval region between multiple extinction grizzly bars 200 in the screen base 100 is provided with printing opacity Area 400.

For orthographic projection printing opacity projection screen 1000 in the present embodiment when being shown as picture, projected light is by the screen base 100 side is incided on the diffusing reflection layer 300, is reflected and is emitted along the direction away from the screen base 100；Background Light is incided in the screen base 100 by the opposite side of the screen base 100, through the printing opacity in the screen base 100 Area 400 transmits, and is emitted along with the projected light identical direction reflected.

It is understood that the side that the screen base 100 is provided with extinction grizzly bar 200 can be regarded as the present embodiment The front (or observation side) of the orthographic projection printing opacity projection screen 1000 of offer, and the screen base 100 is not provided with extinction grid The side of bar 200 can be regarded as the rear (or background side) of orthographic projection printing opacity projection screen 1000.When the eyes position of observer When the front of orthographic projection printing opacity projection screen 1000 and the face orthographic projection printing opacity projection screen 1000, observer can either see The projected light that diffusing reflection layer 300 on by extinction grizzly bar 200 reflects, while and can enough passes through the printing opacity in screen base 100 See by the bias light of the scene transmitting (or reflection) at the rear of orthographic projection printing opacity projection screen 1000, i.e. observer's energy in area 400 Enough projected images seen simultaneously in front of screen and the scene at the screen rear (figure that material object, performance or other display equipment are shown Picture), realize the dual display of forward and backward scape rich in stereovision.

It refer to Fig. 2 and Fig. 3, in the present embodiment, the shape of the extinction grizzly bar 200 can be seamed edge as shown in Figure 2 Linear strip or seamed edge as shown in Figure 3 for straight line are the non-linear strip of curve.

In the present embodiment, multiple extinction grizzly bars 200 are distributed in described with the linear strip being parallel to each other or non-linear strip The observation side surface (preceding surface) of screen base 100.It is understood that the extinction grizzly bar 200 can be parallel to screen base Certain of material 100 is while setting, can also be set at an angle on one side with certain of the screen base 100.

In the present embodiment, the shape of the multiple extinction grizzly bar 200 is all identical.Particularly, it is distributed in screen base 100 The shape of multiple extinction grizzly bars 200 on surface can also be incomplete same, such as can be linear strip and non-linear Any combination of strip.It is understood that when the shape of the multiple extinction grizzly bar 200 is all identical, screen base Prospect imaging area on 100 is evenly distributed, and has preferable prospect imaging (projection photoimaging) effect.

It refer to Fig. 1, Fig. 4, Fig. 5, Fig. 6 and Fig. 7, in the present embodiment, the cross sectional shape of the extinction grizzly bar 200 can be It is diversified, it can be non-parallel quadrangle as shown in Figure 1, can be right-angled trapezium as shown in Figure 4, can be such as Fig. 5 Shown right angled triangle, can be fan-shaped or as shown in Figure 7 acute triangle as shown in Figure 6, or other by The polygon that a plurality of straight line or curved side are formed.It is understood that the length of side, the angle in the section of extinction grizzly bar 200 It is designed according to specific application environment, to realize optimal display effect in the application environment.

Particularly, the shape of the diffusing reflection layer 300 coated on the surface of extinction grizzly bar 200 can be according to extinction grizzly bar 200 shape is designed accordingly.Such as shown in Fig. 7, the thickness of diffusing reflection layer 300 is from screen base 100 to extinction grid The front end of bar 200 is gradually thinning, and this is designed to ensure that diffusing reflection layer 300 is gathered around under the structure of extinction grizzly bar 200 shown in Fig. 7 There is preferable imaging effect.

Fig. 8 is refer to, as a kind of specific embodiment, the section of multiple extinction grizzly bars 200 in screen base 100 Shape can be incomplete same, such as fan-shaped and triangle combination in Fig. 8.It should be noted that shown in Fig. 8 only It is the one of which of all possible different cross section shape combination, it is possibility to have the combination of other shapes.

In the present embodiment, the interval in the multiple extinction grizzly bar 200 between two adjacent extinction grizzly bars 200 can be Identical (refer to Fig. 1) or different (refer to Fig. 9).It is likewise, simply all possible shown in Fig. 9 With one kind in the structure of extinction grizzly bar 200 of different interval setting or the structure being spaced apart otherwise.

In the present embodiment, the transparent area 400 can be uniformly arranged in the screen base 100, can also be uneven Be arranged in the screen base 100, width, the area of the transparent area 400 can be according to the distribution knots of extinction grizzly bar 200 Structure is designed accordingly.

Particularly, the spacing distance between extinction grizzly bar 200 needs not be equal to the width of transparent area 400, adjacent two The width of transparent area 400 between extinction grizzly bar 200 is not more than the spacing distance between the two extinction grizzly bars 200.

Accordingly, absorbance region can also be arranged at intervals in the screen base 100, the extinction area in screen base 100 Domain does not influence the projection imaging in front of screen, the imaging of the bias light at screen rear can be only influenceed, between adjacent absorbance region Interval can be transparent area 400 width, the position of absorbance region can be with the position correspondence of extinction grizzly bar 200.It can manage Solve, the absorbance region in the screen base 100 can be the structure of screen base 100 itself or pass through it His form is arranged on the light-absorption layer 220 (refer to Figure 10) being made by light absorbent of the dorsal part of screen base 100.

In the present embodiment, the extinction grizzly bar 200 can be that black light-absorbing material is made, and its visible-light absorptivity is big In or equal to 10%, i.e. the absorbing ability maximum of extinction grizzly bar 200 can be 100% extinction, and minimum can be 10% extinction.Inhale Gratings strips 200 can absorb small part and incide projected light on extinction grizzly bar 200, and be incided from other directions on screen Ambient light and other veiling glares, enhance the anti-light ability of screen, improve imaging effect.

In the present embodiment, the transparent area 400 in screen base 100 can be all-transparent or coloring or non- All-transparent.Preferably, the visible light transmissivity of the transparent area 400 is more than or equal to 10%.

In the present embodiment, a side surface of the extinction grizzly bar 200 can all coat diffusing reflection layer 300 and (refer to figure 1) diffusing reflection layer 300 (refer to Figure 11), can also partly be coated.Can it is understood that being one kind shown in Figure 11 The structure of the part coating diffusing reflection layer 300 of energy, can also be other part coated forms.

In the present embodiment, the side of the extinction grizzly bar 200 can be coated with individual layer diffusing reflection layer 300 (refer to Fig. 1), Multilayer diffusing reflection layer 300 (refer to Figure 12) can also be coated with.For example, it can first be coated with one in the side of extinction grizzly bar 200 Layer silver inks reflecting layer, then white ink layer reflecting layer etc. is coated with the silver inks reflecting layer.

Figure 13 is refer to, in the present embodiment, it is preferred that the extinction grizzly bar 200 is coated with the side of the diffusing reflection layer 300 The angle of face (imaging surface) and the screen base 100 is α, the side of the uncoated diffusing reflection layer 300 of extinction grizzly bar 200 The angle of face (interference surface) and the screen base 100 is β, and the height of the extinction grizzly bar 200 is H, the extinction grizzly bar 200 Width be P, wherein, 0≤α≤70 °, 45 °≤β≤90 °, H >=0.2P.Cutting when extinction grizzly bar 200 is show only in Figure 11 A kind of situation when face is triangle, it is to be understood that when the section of extinction grizzly bar 200 is other shapes, can still meet Above-mentioned relational expression.

In the present embodiment, former and later two surfaces and screen base with air contact of transparent area 400 in screen base 100 The interface of material 100 and extinction grizzly bar 200 keeps minute surface and high finish as far as possible, so that beholder can pass through screen See clearly background as far as possible.But due to method of manufacturing technology, one layer of extinction grid are might have in transparent area 400 The material of bar 200 is attached to the light transmittance for above, influenceing transparent area 400, and such case is allowed.Such case falls within this reality With the scope of new technique, in the scope of protection of the utility model.

The orthographic projection printing opacity projection screen 1000 that the present embodiment provides can make the projection image information in front of screen The perfect imaging display on the diffusing reflection layer 300 of the side of extinction grizzly bar 200, while the scene after screen back is also passed through screen Transparent area 400 on curtain base material 100 enters the sight of observer through screen, and this two classes image information is not interfere with each other, and energy Being perfectly combined for image information is enough reached by the visual lag of human eye, people is just watched richness before same screen The picture having a sense of hierarchy, realize abundant visual effect.

Second embodiment

Figure 14 is refer to, present embodiments provides a kind of optical projection system 2000, it includes providing in above-mentioned first embodiment Orthographic projection printing opacity projection screen 1000 and projector 500.The projector 500 is arranged on the orthographic projection printing opacity projection screen Screen base 100 in 1000 is provided with the side of extinction grizzly bar 200.

In the present embodiment, on the one hand, sent by the projector 500 for being arranged on the side of screen base 100 (front) Projected light is incided on the diffusing reflection layer 300 set on extinction grizzly bar 200, is reflected and along away from the screen base 100 Direction is emitted, and is eventually arrived in observer's eye；On the other hand, the bias light that scene is sent after screen back is by the screen base 100 opposite side (back side) is incided in the screen base 100, is transmitted through the transparent area 400 in the screen base 100 (refraction), and be emitted along with the projected light identical direction reflected, finally also observed by observed person.

It is understood that the projector 500 is arranged on one close with the diffusing reflection layer 300 on extinction grizzly bar 200 Side, such as shown in Figure 14, diffusing reflection layer 300 is obliquely installed downward, now projector 500 be arranged on screen it is oblique under Side, so that the projected light that projector 500 is emitted is directly incident on diffusing reflection layer 300.Likewise, work as diffusing reflection layer 300 upward When side is obliquely installed, projector 500 can be arranged on the oblique upper of screen；When diffusing reflection layer 300 is arranged on extinction grizzly bar 200 During side, projector 500 can be arranged on the side relative with diffusing reflection layer 300.

In the present embodiment, the projector 500 can be off-axis short focus projector 500, and its off-axis degree is more than 100%, thoroughly Penetrate than less than 0.5.

The inclined-plane of the extinction grizzly bar 200 in screen base 100 in the present embodiment and the angle of transparent area 400 are by projector 500 parameter (projector 500 and the direction of relative position or the projected light outgoing of screen) and folding, the reflectivity decision of material, Finally so that projected light on diffusing reflection layer 300 is incided after the reflection of diffusing reflection layer 300 with different angle in projector 500, collection In so that the direction of normal to screen is parallel or less parallel projects, with the Projection Display effect being optimal.

In summary, the orthographic projection printing opacity projection screen and optical projection system that the utility model embodiment provides, by shielding One side surface of curtain base material is arranged at intervals multiple extinction grizzly bars, and coats diffusing reflection layer in the side of extinction grizzly bar, and in institute The interval region stated between multiple extinction grizzly bars in screen base sets transparent area, and projection screen is divided into for projecting The imaging area of display and the transparent area for passing through bias light.Wherein, the diffusing reflection layer that extinction grizzly bar side is set can reflect Incident projected light in front of from projection screen；And the bias light of the projection screen behind then printing opacity by being set in screen base Area, to be transmitted to the front of screen with the projected light identical direction reflected.Meanwhile the extinction grizzly bar can effectively be inhaled Ambient light and other veiling glares are received, greatly strengthen the anti-light ability of screen, improve the contrast of display picture.And prior art Compare, orthographic projection printing opacity projection screen provided by the utility model and optical projection system make beholder to see overflowing on screen The projected image of reflecting layer reflection, and can enough see the scene after screen back, and projected light by the transparent area being distributed on screen It is not interfere with each other with the two-way light of bias light, realizes being perfectly combined for image information display, is provided for beholder dual Visual enjoyment, its structure is simplified, cost is cheap, can be very good solve the demand that large area prospect is shown.It the foregoing is only Preferred embodiment of the present utility model, the utility model is not limited to, for those skilled in the art, this Utility model can have various modifications and variations.All any modifications within the spirit and principles of the utility model, made, etc. With replacement, improvement etc., should be included within the scope of protection of the utility model.

Claims (10)

1. a kind of orthographic projection printing opacity projection screen, it is characterised in that including screen base, between a side surface of the screen base Every being provided with multiple extinction grizzly bars, the side of the extinction grizzly bar is coated with diffusing reflection layer, multiple institutes in the screen base The interval region stated between extinction grizzly bar is provided with transparent area,

Projected light is incided on the diffusing reflection layer by the side of the screen base, is reflected and along away from the screen base Direction outgoing,

Bias light is incided in the screen base by the opposite side of the screen base, through the transparent area in the screen base Transmission, and be emitted along with the projected light identical direction reflected.

2. orthographic projection printing opacity projection screen according to claim 1, it is characterised in that the extinction grizzly bar is shaped as line Property strip or non-linear strip.

3. orthographic projection printing opacity projection screen according to claim 1, it is characterised in that the cross sectional shape of the extinction grizzly bar For triangle or quadrangle or sector.

4. orthographic projection printing opacity projection screen according to claim 1 a, it is characterised in that side surface of the extinction grizzly bar It is all or part of to coat the diffusing reflection layer.

5. orthographic projection printing opacity projection screen according to claim 1, it is characterised in that adjacent in the multiple extinction grizzly bar Two extinction grizzly bars between interval it is identical.

6. orthographic projection printing opacity projection screen according to claim 1, it is characterised in that the transparent area is uniformly arranged on institute State in screen base.

7. orthographic projection printing opacity projection screen according to claim 1, it is characterised in that the side coating of the extinction grizzly bar There is single or multiple lift diffusing reflection layer.

8. orthographic projection printing opacity projection screen according to claim 1, it is characterised in that the visible ray of the extinction grizzly bar is inhaled Yield is more than or equal to 10%, and the visible light transmissivity of the transparent area is more than or equal to 10%.

9. orthographic projection printing opacity projection screen according to claim 1, it is characterised in that the extinction grizzly bar is coated with described The angle of the side of diffusing reflection layer and the screen base is more than or equal to 0 and less than or equal to 70 °, and the extinction grizzly bar is not coated with Cover the side of the diffusing reflection layer and the angle of the screen base is more than or equal to 45 ° and less than or equal to 90 °, the extinction The height of grizzly bar is more than or equal to the width of 0.2 times of extinction grizzly bar.

10. a kind of optical projection system, it is characterised in that including the orthographic projection printing opacity projection screen as described in any one of claim 1 to 9 Curtain and projector, the screen base that the projector is arranged in the orthographic projection printing opacity projection screen are provided with extinction grizzly bar Side,

The projected light sent by the projector is incided on the diffusing reflection layer set on the extinction grizzly bar, is reflected and along remote Direction from the screen base is emitted,

Bias light is incided in the screen base by the opposite side of the screen base, through the transparent area in the screen base Transmission, and be emitted along with the projected light identical direction reflected.