CN107315314B

CN107315314B - Light-transmitting projection screen capable of being watched on two sides and projection system

Info

Publication number: CN107315314B
Application number: CN201710760641.0A
Authority: CN
Inventors: 张益民
Original assignee: CHENGDU FSCREEN SCI-TECH CO LTD
Current assignee: CHENGDU FSCREEN SCI-TECH CO LTD
Priority date: 2017-08-29
Filing date: 2017-08-29
Publication date: 2023-02-10
Anticipated expiration: 2037-08-29
Also published as: CN107315314A

Abstract

The invention provides a double-sided viewing light-transmitting projection screen and a projection system, and relates to the technical field of projection display. Two-sided printing opacity projection screen of watching includes the screen substrate, one side surface interval of screen substrate is provided with a plurality of solid formation of image strips, mix in the solid formation of image strip and spread the particle, solid formation of image strip with the adjacent one side inclined plane coating of screen substrate has the reflection stratum, it is a plurality of on the screen substrate interval region between the solid formation of image strip is provided with the printing opacity district. Compared with the prior art, the projection screen provided by the invention can enable viewers positioned at two sides of the screen to see the projected images on the screen, and can see the scene at the back side of the screen through the light-transmitting areas distributed on the screen, and the two paths of light rays are not interfered with each other, so that the perfect integration of image information display is realized, and dual visual enjoyment is provided for the viewers.

Description

Light-transmitting projection screen capable of being watched on two sides and projection system

Technical Field

The invention relates to the technical field of projection display, in particular to a light-transmitting projection screen capable of being watched on two sides and a projection system.

Background

Currently, projection screens widely used in the field of projection display can be generally classified into a reflective type and a transmissive type. Wherein, the reflective type is used for front projection, and the transmissive type is used for rear projection.

Reflective projection screens are suitable for use where the viewer is on the same side as the projector. The display image is projected by the projector onto the reflective projection screen and is ultimately reflected into the eye of the viewer.

The transmissive projection screen is suitable for use when the viewer and the projector are located on opposite sides of the projection screen. At this time, the light beam projected onto the projection screen by the projector on one side of the screen is transmitted through the screen and incident on the eyes of the observer on the other side of the screen.

Both of the two main types of projection screens can only observe an image displayed on the projection screen and projected by the projector.

However, in stage performance, show window display or some special occasions, there is an increasing demand for displaying foreground images and viewing background contents, and the existing implementation methods use transparent liquid crystal display, transparent OLED display, phantom display or projection holographic screen display, etc., which can achieve better display effects, but due to the limitation of the projection principle, there is no good solution for the demand for foreground display images with high brightness and ultra-large size.

Disclosure of Invention

The present invention is directed to a dual-side-viewing light-transmissive projection screen and a projection system, which can effectively solve the above-mentioned problems.

The embodiment of the invention is realized by the following steps:

in a first aspect, an embodiment of the present invention provides a light-transmissive projection screen for double-sided viewing, which includes a screen substrate, a plurality of solid image strips are disposed on a surface of one side of the screen substrate at intervals, the solid image strips are doped with diffusing particles, a reflective layer is coated on an inclined surface of one side of each of the solid image strips adjacent to the screen substrate, a light-transmissive region is disposed in a gap region between the solid image strips on the screen substrate, projection light is incident on the solid image strips from the side of the screen substrate where the solid image strips are disposed, a portion of the projection light is reflected by the solid image strips and exits in a direction away from the screen substrate, another portion of the projection light is incident on the reflective layer through the solid image strips, is reflected and penetrates through the screen substrate and exits in a direction opposite to the projection light reflected by the solid image strips, background light incident on the screen substrate from the side of the screen substrate where the solid image strips are disposed is transmitted through the light-transmissive region on the screen substrate, exits in the same direction as the projection light transmitted through the screen substrate, and a side of the solid image strips which is not disposed on the screen substrate, and the background light is reflected through the light incident through the reflective region on the screen substrate, and the solid image strips are reflected through the reflective region.

In a preferred embodiment of the present invention, the solid imaging bar is in the shape of a linear strip or a non-linear strip.

In a preferred embodiment of the present invention, the cross-sectional shape of the solid imaging bar is a triangle, a quadrangle or a fan.

In a preferred embodiment of the present invention, the plurality of solid imaging strips are all the same shape.

In a preferred embodiment of the present invention, the interval between two adjacent solid imaging strips of the plurality of solid imaging strips is the same.

In a preferred embodiment of the present invention, the transparent regions are uniformly disposed on the screen substrate.

In a preferred embodiment of the present invention, the solid imaging strips are made of a transparent organic material doped with diffusing particles.

In a preferred embodiment of the present invention, the visible light transmittance of the light-transmitting region is greater than or equal to 10%.

In a preferred embodiment of the present invention, an included angle between a projection light reflection surface of the solid imaging bar and the screen substrate is greater than or equal to 0 and less than or equal to 70 °, an included angle between a side surface of the solid imaging bar coated with the reflection layer and the screen substrate is greater than or equal to 45 ° and less than or equal to 90 °, and a height of the solid imaging bar is greater than or equal to 0.2 times a width of the solid imaging bar.

In a second aspect, embodiments of the present invention further provide a projection system, which includes the above-mentioned dual-view transmissive projection screen and a projector, where the projector is disposed on one side of the screen substrate in the dual-view transmissive projection screen, where the solid imaging strip is disposed, and projection light emitted by the projector is incident on the solid imaging strip, where a part of the projection light is reflected by the solid imaging strip and exits in a direction away from the screen substrate, and another part of the projection light is incident on the reflective layer through the solid imaging strip, reflected and penetrates through the screen substrate, and exits in a direction opposite to the projection light reflected by the solid imaging strip, and background light incident on the screen substrate from the side of the screen substrate where the solid imaging strip is disposed is transmitted through a transmissive region on the screen substrate, and exits in the same direction as the projection light transmitted through the screen substrate, and background light incident on the screen substrate from the side of the screen substrate where the solid imaging strip is not disposed is transmitted through the transmissive region on the screen substrate, and exits in the same direction as the projection light reflected by the solid imaging strip.

According to the double-sided-viewing light-transmitting projection screen and the projection system provided by the embodiment of the invention, the projection screen is divided into the imaging area for projection display and the light-transmitting area for transmitting background light by arranging the plurality of solid imaging strips on one side surface of the screen substrate at intervals and arranging the light-transmitting area in the interval area between the plurality of solid imaging strips on the screen substrate. The solid imaging strip is doped with diffusion particles, and the refractive index distribution of the solid imaging strip can be changed, so that the solid imaging strip has the capability of partially reflecting and partially transmitting projection light; and the background lights at the two sides of the projection screen respectively transmit to the other side of the screen through the light-transmitting areas arranged on the screen base material. Compared with the prior art, the double-sided viewing light-transmitting projection screen and the projection system provided by the invention have the advantages that viewers positioned at two sides of the screen can see projected images on the screen, and can see scenes at the back side of the screen through the light-transmitting areas distributed on the screen, the two paths of light rays of the projected light and the background light are not interfered with each other, the perfect integration of image information display is realized, double visual enjoyment is provided for the viewers at two sides of the screen, the structure is simple, the cost is low, and the requirement of large-area display can be well met.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic structural diagram of a dual-side viewing transmissive projection screen according to a first embodiment of the present invention;

FIG. 2 is a schematic structural diagram of a linear elongated solid imaging strip according to a first embodiment of the present invention;

FIG. 3 is a schematic structural diagram of a non-linear elongated solid imaging strip according to a first embodiment of the present invention;

FIG. 4 is a schematic diagram of a second solid imaging bar with a cross-sectional shape according to the first embodiment of the present invention;

FIG. 5 is a schematic diagram illustrating a solid imaging bar with a third cross-sectional shape according to a first embodiment of the present invention;

FIG. 6 is a schematic structural diagram of a fourth solid imaging bar with a cross-sectional shape according to the first embodiment of the present invention;

FIG. 7 is a schematic diagram illustrating a solid imaging bar with a fifth cross-sectional shape according to a first embodiment of the present invention;

FIG. 8 is a schematic diagram of a solid imaging bar with various combinations of cross-sectional shapes according to a first embodiment of the present invention;

FIG. 9 is a schematic structural diagram of solid imaging strips arranged at different intervals according to a first embodiment of the present invention;

FIG. 10 is a schematic view of the design parameters of a preferred solid imaging bar according to a first embodiment of the present invention;

fig. 11 is a schematic structural view illustrating a transparent organic material attached to a transparent region according to a first embodiment of the present invention;

FIG. 12 is a schematic view of a projection system according to a second embodiment of the present invention;

fig. 13 is a schematic structural diagram of another projection system according to a second embodiment of the present invention.

Icon: 100-screen substrate; 200-solid imaging bar; 300-a reflective layer; 400-a light-transmitting region; 500-a projector; 1000-double-sided viewing of a light-transmissive projection screen; 2000 — projection system.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined or explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "middle", "upper", "lower", "left", "right", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or the orientations or positional relationships that the products of the present invention are usually placed in when used, and are only used for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the devices or elements referred to must have specific orientations, be constructed in specific orientations, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical", "overhang" and the like do not imply that the components are required to be absolutely horizontal or overhang, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Furthermore, the terms "input", "output", "feedback", "forming", and the like should be understood to describe an optical, electrical variation or optical, electrical process. Such as "forming" merely means that an optical signal or an electrical signal is optically or electrically changed after passing through the element, the apparatus or the device, so that the optical signal or the electrical signal is processed to obtain a signal required for implementing the technical solution or solving the technical problem.

In the drawings of the embodiments of the present invention, in order to better and more clearly describe the working principle of each component in the dual-side viewing light-transmitting projection screen and the projection system, the connection relationship of each component in the device is shown, only the relative position relationship between each component is clearly distinguished, and the limitation on the light path direction, the connection sequence, and the size, the dimension and the shape of each component structure in the component or the structure cannot be formed.

First embodiment

Referring to fig. 1, the present embodiment provides a double-sided viewing light-transmissive projection screen 1000, which includes a screen substrate 100, a plurality of solid image strips 200 are disposed on one side surface of the screen substrate 100 at intervals, diffusion particles are doped in the solid image strips 200, a reflective layer 300 is coated on an inclined surface of one side of the solid image strips 200 adjacent to the screen substrate 100, and a light-transmissive region 400 is disposed in an interval region between the solid image strips 200 on the screen substrate 100.

When the dual-side viewing transmissive projection screen 1000 in this embodiment displays images, projection light is incident on the solid imaging bar 200 from the side of the screen substrate 100 where the solid imaging bar 200 is disposed, wherein a part of the projection light is reflected by the solid imaging bar 200 and exits in a direction away from the screen substrate 100; another portion of the projected light is incident on the reflective layer 300 through the solid image strip 200, reflected and transmitted through the screen substrate 100, and exits in a direction opposite to the projected light reflected by the solid image strip 200. The background light incident on the screen substrate 100 from the side of the screen substrate 100 where the solid imaging strips 200 are arranged is transmitted through the light-transmitting area 400 on the screen substrate 100 and is emitted in the same direction as the projection light transmitted through the screen substrate 100; the background light incident on the screen substrate 100 from the side of the screen substrate 100 where the solid imaging strip 200 is not disposed is transmitted through the light-transmitting region 400 on the screen substrate 100 and exits in the same direction as the projection light reflected by the solid imaging strip 200.

It is understood that the side of the screen substrate 100 not provided with the solid imaging strips 200 can be considered to be the front (or rear) of the dual view transmissive projection screen 1000 provided in the present embodiment, and the side of the screen substrate 100 provided with the solid imaging strips 200 can be considered to be the rear (or front) of the dual view transmissive projection screen 1000.

On one hand, when the two eyes of the observer are located in front of the transmissive projection screen 1000 for double-sided viewing and directly face the transmissive projection screen 1000 for back projection, the observer can see both the projection light reflected by the reflective layer 300 on the solid imaging strip 200 and transmitted through the screen substrate 100, and the background light emitted (or reflected) by the scene behind the transmissive projection screen 1000 for back projection through the transmissive region 400 on the screen substrate 100; on the other hand, when the two eyes of the observer are behind the dual view transmissive projection screen 1000 and directly face the dual view transmissive projection screen 1000, the observer can see both the projection light reflected by the solid imaging bar 200 and the background light emitted (or reflected) by the scene in front of the dual view transmissive projection screen 1000 through the transmissive region 400 on the screen substrate 100. Namely, the observer can see the projection image in front of the screen (on one side of the observer) and the scene (the image displayed by the real object, performance or other display devices) behind the screen (on the other side opposite to the observer) at the same time no matter the observer is positioned in front of or behind the screen, and the front and back scene double display with rich layering on both sides of the screen is realized.

Referring to fig. 2 and 3, in the present embodiment, the shape of the solid imaging bar 200 may be a linear strip whose edge is a straight line as shown in fig. 2, or may be a non-linear strip whose edge is a curved line as shown in fig. 3.

In this embodiment, the solid image strips 200 are distributed on one side surface of the screen substrate 100 in parallel linear strips or non-linear strips. It is understood that the solid imaging bar 200 can be disposed parallel to a side of the screen substrate 100 or at an angle to a side of the screen substrate 100.

In this embodiment, the plurality of solid imager strips 200 are all the same shape. In particular, the shapes of the plurality of solid image strips 200 distributed on the surface of the screen base material 100 may not be completely the same, and may be any combination of linear strips and non-linear strips, for example. It can be understood that when the shapes of the plurality of solid imaging bars 200 are all the same, the projection imaging areas on the screen substrate 100 are uniformly distributed, and have a better foreground imaging (projection light imaging) effect.

Referring to fig. 1, 4, 5, 6 and 7, in the present embodiment, the solid imaging bar 200 may have various cross-sectional shapes, such as a non-parallelogram shape as shown in fig. 1, a right trapezoid shape as shown in fig. 4, a right triangle shape as shown in fig. 5, a fan shape as shown in fig. 6, an acute triangle shape as shown in fig. 7, or other polygons formed by a plurality of straight or curved sides. It is understood that the side length and the angle of the cross section of the solid imaging bar 200 can be designed according to the specific application environment to achieve the optimal display effect in the application environment.

In particular, the shape of the reflective layer 300 coated on the surface of the solid imaging bar 200 can be designed according to the shape of the solid imaging bar 200. For example, as shown in fig. 7, the thickness of the reflective layer 300 gradually decreases from the screen substrate 100 to the foremost end of the solid imaging bar 200, which ensures that the reflective layer 300 has better projection light imaging capability under the structure of the solid imaging bar 200 shown in fig. 7.

Referring to fig. 8, as a specific embodiment, the cross-sectional shapes of the solid imaging strips 200 on the screen substrate 100 may not be identical, such as a combination of a quadrilateral and a triangle in fig. 8. It should be noted that fig. 8 shows only one of all possible combinations of different cross-sectional shapes, and that other combinations of shapes are possible.

In this embodiment, the intervals between two adjacent solid imaging strips 200 in the plurality of solid imaging strips 200 may be the same (see fig. 1) or different (see fig. 9). Similarly, fig. 9 shows only one of all possible configurations of solid imaging strips 200 arranged at different intervals, but also other configurations of spacing.

In this embodiment, the light-transmitting regions 400 may be uniformly disposed on the screen substrate 100, or may be non-uniformly disposed on the screen substrate 100, and the width and area of the light-transmitting regions 400 may be designed correspondingly according to the distribution structure of the solid imaging strips 200.

In particular, the separation distance between the solid imaging bars 200 is not necessarily equal to the width of the light-transmissive region 400, and the width of the light-transmissive region 400 between two adjacent solid imaging bars 200 is not greater than the separation distance between the two solid imaging bars 200.

In this embodiment, by doping the diffusion particles in the solid imaging bar 200, the refractive index distribution of the material of the solid imaging bar 200 can be changed, so that the solid imaging bar 200 has functions of partially reflecting and partially transmitting the projection light, and the projection light reflecting surface of the solid imaging bar 200 has a light splitting function, thereby realizing functions of partially reflecting or scattering (diffuse reflection) and partially transmitting the projection light.

In this embodiment, a coloring diffusion layer may be disposed on a surface of the screen substrate 100 on which the solid imaging bar 200 is disposed, so as to manufacture the solid imaging bar 200. The solid imaging bar 200 may be formed of a transparent organic material doped with diffusion particles, and preferably, may be formed of a highly transparent chemical resin or a thermosetting resin doped with diffusion particles, and may be formed by coating a wet film on the screen substrate 100, molding the wet film with a mold, and curing the wet film. The method comprises the following specific steps:

1) Coating a wet film: the optical resin or thermosetting resin mixed with the diffusion particles may be coated on the surface of the coloring diffusion layer on the prepared screen substrate 100, or the optical resin or thermosetting resin may be passed through the coating after the structure of the solid imaging strip 200 is completed, and then the structure of the solid imaging strip 200 is laminated with the coloring diffusion layer on the screen substrate 100 through transparent glue.

2) Die pressing: the shape and structure of the solid imaging bar 200 can be designed according to specific parameters of the projection equipment, and then a precision machine tool is used for processing a mold with the shape, wherein the mold is generally a cylindrical mold.

3) Curing and forming: and curing and forming the coated wet film after mould pressing by ultraviolet irradiation or heating.

In this embodiment, the reflective layer 300 on the solid imaging bar 200 may be made of a metal material, and may be made by printing, spraying, coating, or evaporation, and the like, and has a thickness of about 0.1 μm, and the reflective surface has a high visible light reflectivity and is used for reflecting projection light.

In this embodiment, the reflective layer 300 disposed on one side surface of the solid imaging strip 200, which is far from the solid imaging strip 200, may be disposed with a light absorbing material having a visible light absorption rate of 10% or more, that is, the light absorbing capacity of the light absorbing surface of the reflective layer 300 opposite to the reflective surface may be 100% light absorbing at the maximum, and may be 10% light absorbing at the minimum. The light-absorbing surface on the back side of the reflecting layer 300 can absorb ambient light and other stray light incident to the back side of the reflecting layer 300 from other directions, so that the light-resisting capability of the screen is enhanced, the interference of the ambient light to projection light is avoided, and the projection imaging effect is improved.

In this embodiment, the transparent area 400 on the screen substrate 100 may be completely transparent, or may be colored or not completely transparent. Preferably, the visible light transmittance of the light-transmitting region 400 is greater than or equal to 10%.

Referring to fig. 10, in the present embodiment, preferably, an included angle between a surface of the solid imaging bar 200 for reflecting projection light and the screen substrate 100 is α, an included angle between a side surface of the solid imaging bar 200 on which the reflective layer 300 is coated and the screen substrate 100 is β, a height of the solid imaging bar 200 is H, a width of the solid imaging bar 200 is P, where α is greater than or equal to 0 and less than or equal to 70 °, β is greater than or equal to 45 ° and less than or equal to 90 °, and H is greater than or equal to 0.2P. While only one case is shown in FIG. 10 when the solid imaging bar 200 is quadrilateral in cross-section, it will be understood that the relationship described above may be satisfied when the solid imaging bar 200 is other shapes in cross-section.

In this embodiment, the front and back air-contacting surfaces of the light-transmitting region 400 on the screen substrate 100 and the interface of the screen substrate 100 with the solid imaging bar 200 are kept as specular and smooth as possible, so that the viewer can see as clear a background as possible through the screen. However, due to the manufacturing process, as shown in FIG. 11, there may be a layer of solid imaging strip 200 material attached to light-transmissive region 400, which affects the light transmission of light-transmissive region 400, as may be permitted. This is also the case within the technical scope of the present invention and is within the scope of the present invention.

The double-sided light-transmitting projection screen 1000 for watching can enable the viewers at two sides of the screen to see the projected image displayed by perfect imaging in the projection imaging area formed by the solid imaging strips 200 and the reflecting layer 300 on the screen, and can see the scene at the other side of the screen through the light-transmitting areas 400 distributed on the screen substrate 100, and the two types of image information of projection light and background light are not interfered with each other, and can achieve perfect integration of the image information through the visual delay of human eyes, so that people can watch the pictures rich in layering before the same screen, and rich visual effects are realized.

Second embodiment

Referring to fig. 12, the present embodiment provides a projection system 2000, which includes the dual-side viewing transparent projection screen 1000 and the projector 500 provided in the first embodiment. The projector 500 is disposed on the side of the screen substrate 100 in the dual view transmissive projection screen 1000 on which the solid imaging strips 200 are disposed.

In this embodiment, when an observer stands on one side of the projector 500 to observe the screen, the projection light emitted by the projector 500 is incident on the solid imaging bar 200, wherein a portion of the projection light is reflected and exits in a direction away from the screen substrate 100, and finally reaches the eyes of the observer on one side of the projector 500; the background light emitted from the scene on the side of the screen where the solid imaging bar 200 is not disposed is incident on the screen substrate 100, is transmitted (refracted) through the light-transmitting region 400 on the screen substrate 100, and is emitted in the same direction as the projection light reflected by the solid imaging bar 200, and is finally observed by the observer.

In this embodiment, when an observer stands on the other side of the screen opposite projector 500 to view the screen, the projected light from projector 500 is incident on the solid imaging bar 200, with a portion of the transmission incident on the reflective layer 300, reflected and transmitted through the screen substrate 100, and finally into the eye of the observer on the other side of the screen; the background light emitted from the scene on the side of the projector 500 is incident on the screen substrate 100, is transmitted (refracted) through the light-transmitting region 400 on the screen substrate 100, and is emitted in the same direction as the projection light reflected by the reflective layer 300, and is finally observed by the observer.

It will be appreciated that the projector 500 is disposed on the side opposite the reflective layer 300 on the solid image bar 200, such as shown in fig. 12, and the reflective layer 300 is disposed above the solid image bar 200, in which case the projector 500 is disposed obliquely below the screen to prevent the projection light emitted from the projector 500 from being absorbed directly onto the back light absorbing material of the reflective layer 300. Likewise, as shown in FIG. 13, when the reflective layer 300 is disposed on the lower slope of the solid image bar 200, the projector 500 may be disposed diagonally above the screen. Similarly, when the reflective layer 300 is disposed on a side of the solid imaging bar 200, the projector 500 may be disposed on the other side opposite the reflective layer 300.

In this embodiment, the projector 500 may be an off-axis short-focus projector 500, and the off-axis degree is greater than 100% and the transmittance is less than 0.5.

In this embodiment, the included angle between the inclined plane of the solid imaging bar 200 on the screen substrate 100 and the transparent area 400 is determined by the parameters of the projector 500 (the relative position between the projector 500 and the screen or the direction of the projected light emitted) and the refraction and reflection rate of the material, and finally, the projected light emitted from the projector 500 to the different solid imaging bars 200 at different angles is concentrated to be emitted in parallel or approximately in parallel in the direction perpendicular to the screen, so as to achieve the optimal projection display effect.

In summary, in the dual-view transmissive projection screen and the projection system provided by the embodiments of the invention, the solid imaging bars are disposed on one side surface of the screen substrate at intervals, and the transmissive region is disposed in the interval region between the solid imaging bars on the screen substrate, so that the projection screen is divided into the imaging region for projection display and the transmissive region for transmitting the background light. The solid imaging strip is doped with diffusion particles, and the refractive index distribution of the solid imaging strip can be changed, so that the solid imaging strip has the capability of partially reflecting and partially transmitting projection light; and the background lights at the two sides of the projection screen respectively transmit to the other side of the screen through the light-transmitting areas arranged on the screen base material. Compared with the prior art, the double-sided viewing light-transmitting projection screen and the projection system provided by the invention have the advantages that viewers positioned at two sides of the screen can see projected images on the screen, and can see scenes at the back side of the screen through the light-transmitting areas distributed on the screen, the two paths of light rays of the projected light and the background light are not interfered with each other, the perfect integration of image information display is realized, the double visual enjoyment is provided for the viewers at two sides of the screen, the structure is simple, the cost is low, and the requirement of large-area display can be well met. The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The light-transmitting projection screen is characterized by comprising a screen substrate, wherein a plurality of solid imaging strips are arranged on one side surface of the screen substrate at intervals, diffusion particles are doped in the solid imaging strips, a side inclined plane of the solid imaging strips adjacent to the screen substrate is coated with a reflecting layer, light-transmitting areas are arranged in interval areas among the solid imaging strips on the screen substrate,

projection light is incident on the solid imaging strip from the side of the screen substrate on which the solid imaging strip is disposed,

wherein a portion of the projected light is reflected by the solid imaging bar and exits in a direction away from the screen substrate,

another portion of the projected light is incident on the reflective layer through the solid imaging strips, reflected and transmitted through the screen substrate, and exits in a direction opposite to the projected light reflected by the solid imaging strips,

the background light incident on the screen substrate from one side of the screen substrate provided with the solid imaging strip is transmitted through the light-transmitting area on the screen substrate and is emitted out along the same direction as the projection light penetrating through the screen substrate,

and background light incident on the screen substrate from one side of the screen substrate, which is not provided with the solid imaging strips, is transmitted through the light-transmitting area on the screen substrate and is emitted in the same direction as projection light reflected by the solid imaging strips.

2. The dual view, transmissive projection screen of claim 1, wherein the solid image bars are in the shape of linear or non-linear strips.

3. The dual view lucent projection screen of claim 1, wherein the solid imaging strips have a triangular or quadrilateral or fan-shaped cross-sectional shape.

4. The dual view, transmissive projection screen of claim 1, wherein the plurality of solid image strips are all the same shape.

5. The dual view lucent projection screen of claim 1, wherein the spacing between adjacent ones of the plurality of solid image strips is the same.

6. The dual view transmissive projection screen of claim 1, wherein the transmissive regions are uniformly disposed on the screen substrate.

7. The dual view lucent projection screen of claim 1, wherein the solid imaging strips are made of a transparent organic material doped with diffusing particles.

8. The dual view transmissive projection screen of claim 1, wherein the visible light transmission of the transmissive region is greater than or equal to 10%.

9. The dual view transmissive projection screen of claim 1, wherein the solid image strip has a projection light reflecting surface that makes an angle with the screen substrate of greater than or equal to 0 ° and less than or equal to 70 °, and the solid image strip has a side coated with the reflective layer that makes an angle with the screen substrate of greater than or equal to 45 ° and less than or equal to 90 °.

10. A projection system comprising the dual view, transmissive projection screen of any of claims 1-9 and a projector disposed in the dual view, transmissive projection screen on a side of the screen substrate on which the solid imaging strips are disposed,

projection light emitted by the projector is incident on the solid imaging bar,

and background light incident on the screen substrate from one side of the screen substrate, which is not provided with the solid imaging strips, is transmitted through the light-transmitting area on the screen substrate and is emitted in the same direction as the projection light reflected by the solid imaging strips.