CN218213776U - Transparent rear projection screen and projection system - Google Patents

Abstract

The utility model discloses a transparent rear projection screen and a projection system, relating to the technical field of projection display; the problem of narrow application scene of transparent content display is solved; the transparent rear projection screen comprises a screen body, wherein the screen body is a micro-nano bidirectional screen, and the micro-nano bidirectional screen comprises a transparent display area and a reflection area for changing the transmission direction of incident light; the projection system comprises a base and projection display equipment, wherein the base is used for fixing a screen body, a screen use angle adjusting part is arranged on the top surface of the base, and the screen use angle adjusting part comprises two fixing seats which are respectively and fixedly connected to two side surfaces of the base, a clamping cylinder arranged on the top surface of the base, an arc-shaped groove arranged on the outer wall of one side of each fixing seat, and a driving connecting structure arranged in each fixing seat; the driving connection structure comprises a connection disc which is rotatably connected to the inner wall of one side of the fixed seat. The utility model discloses utilize the transparent demonstration that receives the structural design realization content a little, and then reach the purpose that enlarges the application scene.

Description

Transparent rear projection screen and projection system

Technical Field

The utility model relates to a projection display technology field especially relates to a transparent rear-projection screen and projection system.

Background

Currently, projection screens widely used in the field of projection display can be generally classified into a reflective type for front projection and a transmissive type for rear projection. The reflective projection screen is suitable for the condition that an observer and the projector are positioned at the same side, and a display image is projected onto the reflective projection screen by the projector and finally reflected into eyes of the observer; the transmissive projection screen is suitable for the case where the observer and the projector are respectively located on both sides of the projection screen, and at this time, the light beam projected onto the projection screen by the projector on one side of the screen passes through the screen and is incident on the eyes of the observer on the other side of the screen.

In the prior art, the prompter device displays the content of the manuscript through a high-brightness display device, and reflects the content displayed by the display device to a spectroscope which is at an angle of 45 degrees and is in front of a camera lens, so as to reflect lines out, so that a presenter can face a camera while watching the lecture words. The prompter spectroscope is a high-reflection high-transmission medium spectroscope, transparent display is realized based on a semi-transparent and semi-reflective (mirror reflection) and front projection mode, the mirror angle has strong limitation on the position of a projection light source and the observation position of a user, and application requirements except for the prompter are difficult to meet, so that the transparent display realization of contents is limited by the prompter, and the transparent display of other scenes cannot be realized.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the defects in the prior art and providing a transparent rear projection screen and a projection system.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a transparent rear projection screen comprises a screen body, wherein the screen body is a micro-nano bidirectional screen, and the micro-nano bidirectional screen comprises a transparent display area and a reflection area for changing the transmission direction of incident light; the reflecting area is composed of a transparent base material and micro-nano structure protrusions arranged on the side face of the transparent base material, and the micro-nano structure protrusions comprise incident faces and reflecting faces.

As a further aspect of the present invention: the transparent substrate comprises inorganic glass, PMMA, PS and PC.

As a further aspect of the present invention: the size of the incident plane reference light spot of the micro-nano structure protrusion is designed according to the incident angle; and the reflecting surface of the micro-nano structure protrusion is designed according to an incident angle.

The utility model provides a projection system, is including base and the projection display equipment that is used for fixed screen body, the top face of base is provided with screen use angle adjustment portion, and screen use angle adjustment portion includes two respectively fixed connection in the fixing base of base both sides face, set up in the centre gripping section of thick bamboo of base top face, set up in the arc wall of fixing base one side outer wall, set up in the inside drive connection structure of fixing base.

As the utility model discloses further scheme again: the driving connection structure comprises a connecting disc rotatably connected to the inner wall of one side of the fixed seat, a movable toothed plate slidably connected to the inner wall of the bottom of the fixed seat, teeth fixedly connected to the circumferential outer wall of the connecting disc, a through groove arranged on the outer wall of one side of the fixed seat and an adjusting block slidably connected to the inner wall of the through groove, and the teeth are meshed with the outer wall of the movable toothed plate;

one end of the adjusting block is fixedly connected to one side face of the movable toothed plate.

As a further aspect of the present invention: a connecting column is fixedly connected to one side face, close to the bottom end, of the clamping cylinder, and one end of the connecting column is fixedly connected to one end of the connecting disc.

As the utility model discloses further scheme again: a centre gripping section of thick bamboo constitutes normal running fit's arc seat by two bottoms through the pivot and constitutes, and a side of two arc seats all passes through slider sliding connection in the inner wall of arc wall.

As the utility model discloses further scheme again: the outer walls of the two arc-shaped seats are fixedly connected with connecting blocks, and the inner walls of the two connecting blocks are provided with the same fastening pin;

the circumferential inner wall of the clamping cylinder is provided with a clamping block; and a protective pad is arranged on the circumferential inner wall of the clamping cylinder at the bottom end.

As the utility model discloses further scheme again: the outer wall of the bottom of the base is provided with a shock pad; and the outer wall of the bottom of the base is provided with a T-shaped supporting leg.

Compared with the prior art, the utility model provides a transparent rear-projection screen and projection system possesses following beneficial effect:

1. the transparent rear projection screen and the projection system are matched with the projection system in a rear projection mode, a micro-nano bidirectional screen formed by a transparent display area and a reflection area is arranged, a refraction/reflection unit array is manufactured on a transparent substrate through a micro-nano manufacturing process, the change of the image light direction is realized, the area outside the micro-nano unit array is used for light transmission, back-projected light is projected to the eyes of a viewer after passing through the refraction/reflection unit array, and under the condition that the screen is not required to be provided with an internal circuit, the transparent display of contents is realized by utilizing the micro-nano structure design, and the purpose of expanding the application scene is further achieved.

2. This transparent rear-projection screen and projection system, use angle adjustment portion through setting up the screen, according to actual demand's use angle, promote the regulating block around leading to the inslot, make the fishback take place synchronous rectilinear movement, the fishback can drive the connection pad rather than the meshing when removing, and then drive a centre gripping section of thick bamboo through the spliced pole and rotate, thereby adjust the use angle of screen body, and projection display equipment's light projection direction adjusts according to the use angle of screen body thereupon, so that screen body angular adjustment is in income light angle certain range, do not influence when adjusting screen angle and watch the visual angle, make the viewer need not or change viewing position as little as possible, high durability and convenient use.

3. According to the transparent rear projection screen and the projection system, the bottom end of the screen body is placed in the clamping cylinder, and then the fastening pin is rotated according to the thickness of the screen body, so that the top ends of the two arc-shaped seats are close to and attached to the two side surfaces of the screen body, and the screen bodies with different thicknesses can be conveniently fixed; the stability of screen body bottom is used for strengthening through setting up the grip block.

4. This transparent rear-projection screen and projection system, when not using equipment, adjustable screen body is rolled over and is put back on base top face, pulls out protective cloth from the wind-up roll to draw protective cloth one end and fill in the draw-in groove, so that protective cloth shields off to prevent dust etc. on the surface of screen body.

5. According to the transparent rear projection screen and the projection system, the rear projection mode and the screen projection light source with the micro-nano structure are utilized to not shield the sight, the space between a user and a display plane is free, and the requirements of rear projection illumination, mirror surface angle adjustment and the like can be met.

Drawings

Fig. 1 is an overall schematic view of a projection system according to the present invention;

fig. 2 is a schematic diagram of distribution of micro-nano structure protrusions of a transparent rear projection screen according to the present invention;

fig. 3 is a schematic diagram of another distribution structure of the micro-nano structure protrusions of the transparent rear projection screen according to the present invention;

fig. 4 is a schematic diagram of the present invention for looking at a transparent rear projection screen;

fig. 5 is a schematic bottom view of a base of a projection system according to the present invention;

fig. 6 is a schematic top view of a base of a projection system according to the present invention;

fig. 7 is an exploded view of an arc seat and a fixing seat of a projection system according to the present invention;

fig. 8 is a schematic side view of an arc-shaped base of a projection system according to the present invention;

fig. 9 is a schematic cross-sectional view of a fixing base of a projection system according to the present invention;

fig. 10 is a schematic diagram of a connection state structure of the connection disc and the movable toothed plate of the projection system according to the present invention.

In the figure: the device comprises a base 1, a screen body 2, a projection display device 3, a fixing seat 4, a winding roller 5, an adjusting block 6, a damping pad 7, a clamping groove 8, a supporting leg 9T, an adjusting pivot 10, a through groove 12, an arc-shaped seat 13, a fastening pin 14, an arc-shaped groove 15, a clamping block 16, a protective pad 17, a connecting disc 18 and a movable toothed plate 19.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.

Example 1

A projection system, as shown in fig. 1 and 5, includes a base 1, a screen body 2, and a projection display device 3 for projecting image information; the projection display device 3 may be one of a liquid crystal display, an OLED display, a DMD display system, a corresponding projection screen, a DMD display micromirror system, and the like.

Preferably, the image information in the projection display device 3 is used for projecting onto the incident surface of the screen body 2.

Preferably, the light projection direction of the projection display device 3 is adjusted according to the use angle of the screen body 2.

A shock pad 7 for reducing the shock sensation borne by the structure above the base 1 is bonded on the outer wall of the bottom of the base 1; the outer wall of the bottom of the base 1 is hinged with a T-shaped supporting leg 9; the T-shaped supporting leg 9 is turned over from the horizontal state to the vertical state, so that the use height of the base 1 can be adjusted according to the actual application situation on site.

In order to facilitate the adjustment of the use angle of the screen body 2, as shown in fig. 1 and fig. 5-10, the top surface of the base 1 is provided with a screen use angle adjusting part, so that the screen use angle adjusting part is used for realizing the fixation and angle adjustment of the screen body 2; the screen use angle adjusting part comprises two fixed seats 4 which are respectively fixed on two side surfaces of the base 1 through bolts, a clamping cylinder placed on the top surface of the base 1, an arc-shaped groove 15 formed in the outer wall of one side of each fixed seat 4, and a driving connecting structure arranged in each fixed seat 4; the bottom of the screen body 2 is placed in the clamping cylinder for fixing.

Further, the driving connection structure comprises a connection disc 18 rotatably connected to the inner wall of one side of the fixed seat 4, a movable toothed plate 19 slidably connected to the inner wall of the bottom of the fixed seat 4, teeth fixed to the circumferential outer wall of the connection disc 18 through bolts, a through groove 12 formed in the outer wall of one side of the fixed seat 4, and an adjusting block 6 slidably connected to the inner wall of the through groove 12, wherein the teeth are meshed with the outer wall of the movable toothed plate 19; one end of the adjusting block 6 is fixed on one side surface of the movable toothed plate 19 through a bolt;

preferably, a connecting column is fixed on one side surface of the clamping cylinder close to the bottom end through a bolt, and one end of the connecting column is fixed at one end of the connecting disc 18 through a bolt; according to actual demand's use angle, promote regulating block 6 around leading to the inslot 12 for moving toothed plate 19 takes place synchronous rectilinear movement, and moving toothed plate 19 can drive during the removal and rotate rather than the connection pad 18 of meshing, and then drives a centre gripping section of thick bamboo through the spliced pole and rotate, thereby adjusts convenient to use to the use angle of screen body 2.

Preferably, the clamping cylinder is composed of two arc-shaped seats 13 with the bottom ends forming a rotating fit through a rotating shaft, and one side surfaces of the two arc-shaped seats 13 are connected to the inner wall of the arc-shaped groove 15 in a sliding mode through sliding blocks; when the opening distance of the two arc-shaped seats 13 is adjusted, the moving range of the arc-shaped seats 13 is always in the arc-shaped groove 15, and the stability of the clamping cylinder in use is guaranteed.

Furthermore, the outer walls of the two arc-shaped seats 13 are both fixed with connecting blocks through bolts, and the inner walls of the two connecting blocks are connected with the same fastening pin 14 through threads; put the bottom of screen body 2 in a centre gripping section of thick bamboo, then rotate fastening pin 14 according to the thickness of screen body 2 for the top of two arc seats 13 is close and is laminated in the both sides face of screen body 2, the screen body 2 of convenient fixed different thickness.

Preferably, two clamping blocks 16 which are distributed in opposite positions are bonded on the circumferential inner wall of the clamping cylinder; a protective pad 17 for preventing the bearing area of the screen body 2 from being damaged is bonded on the circumferential inner wall of the clamping cylinder at the bottom end;

still more preferably, the holding block 16 is made of an elastic material; the clamping blocks 16 are arranged to enhance the stability of the bottom of the screen body 2.

In order to protect the screen body 2, as shown in fig. 1 and fig. 5-6, a clamping groove 8 is formed in one side surface of the base 1; the inner wall of the other side of the base 1 is rotatably connected with a winding roller 5, and protective cloth for covering the surface of the screen body 2 is wound on the outer wall of the winding roller 5; the outer wall of one side of the base 1 is rotatably connected with an adjusting pivot 10, and one end of the adjusting pivot 10 is connected with one end of the winding roller 5 through a connecting shaft; when the device is not used, the adjustable screen body 2 is folded on the top surface of the base 1, then the protective cloth is pulled out from the winding roller 5, and one end of the protective cloth is pulled to be plugged into the clamping groove 8, so that the protective cloth shields the surface of the screen body 2 from dust and the like; otherwise, when the device is used, the rotating adjusting hinge 10 drives the winding roller 5 to wind and wind the protective cloth, so that the screen body 2 is exposed.

When the device is not used, the adjustable screen body 2 is folded on the top surface of the base 1, the protective cloth is pulled out from the wind-up roll 5, and one end of the protective cloth is pulled to be plugged into the clamping groove 8, so that the protective cloth shields the surface of the screen body 2 from dust and the like; otherwise, when the device is used, the rotating adjusting pivot 10 drives the winding roller 5 to wind and wind the protective cloth, so that the screen body 2 is exposed.

During the use, put screen body 2's bottom in a centre gripping section of thick bamboo, then rotate mounting pin 14 according to screen body 2's thickness for the top of two arc seats 13 is close and is laminated in screen body 2's both sides face, the screen body 2 of convenient fixed different thickness. Then according to actual demand's use angle, promote regulating block 6 around leading to the inslot 12 for moving toothed plate 19 takes place synchronous rectilinear movement, and moving toothed plate 19 can drive the connection pad 18 rotation rather than the meshing when removing, and then drives a centre gripping section of thick bamboo through the spliced pole and rotate, thereby adjusts the use angle of screen body 2.

The utility model discloses utilize rear-projection mode and receive the screen projection light source of structure a little and not shelter from the sight, user and display space between the plane are free, can satisfy demands such as rear-projection illumination, mirror surface angle are adjustable.

Example 2:

a projection system, as shown in fig. 1 and 4, the present embodiment is an improvement of embodiment 1, in which: when the projection display device 3 transmits the image information to the incidence plane with the convex micro-nano structure, the intermediate link can pass through the optical lens system, and the arrangement of the optical collimation system and the like can also be omitted according to the situation.

Example 3:

a transparent rear projection screen, as shown in fig. 1-4, for enabling transparent display of content; the screen comprises a screen body 2, wherein the screen body 2 is a micro-nano bidirectional screen, the micro-nano bidirectional screen is divided into a transparent display area and a reflection area, the transparent display area and the reflection area are distributed in a grid type interval mode or a Sudoku mode or other distribution modes according to design, and the reflection area is formed by arranging micro-nano structure protrusions on the side surface of a transparent base material;

preferably, the reflecting region is used for changing the propagation direction of the incident light ray with a specific angle;

preferably, the transparent substrate includes inorganic glass, PMMA (acryl), PS (polystyrene), PC (polycarbonate), etc.;

preferably, the micro-nano structure protrusion comprises an incident surface and a reflecting surface, and in the actual operation process, the size of the incident surface reference light spot of the micro-nano structure protrusion is designed according to the incident angle; the reflecting surface of the micro-nano structure protrusion is designed according to an incident angle, so that the requirement of an emergent angle is met; the optical information projected from the projection display device 3 passes through the incident surface and then is emitted from the reflection surface to enter human eyes, as shown in fig. 4, when the angle of the screen body 2 is adjusted by the screen use angle adjusting portion, the incident light projected by the projection display device 3 needs to be adjusted in a linkage manner, so that the angle of the screen body 2 is adjusted within a certain range of the incident light angle, and the observer does not need to change the watching position or changes the watching position as little as possible.

It is further preferred that the size of the micro-nano structured protrusions is designed with reference to the projection display part PPI of the projection display device 3, and is typically varied between 100-500um, for example, both may have the same resolution, or may be determined according to the specific situation of the display part of other projection devices.

Preferably, the unit volume of the micro-nano structure protrusion is small, and the micro-nano structure protrusion is in a micrometer level to a millimeter level.

Further, the transparent display area is used for directly enabling the front scenery information to enter human eyes.

When the display screen is used, under the condition that a screen is not required to be provided with an internal circuit, the content is transparently displayed by utilizing the micro-nano structure design; a projection system is matched in a rear projection mode, a refraction/reflection unit array is manufactured on a transparent base material through a micro-nano manufacturing process, the change of the image light ray direction is achieved, the area outside the micro-nano unit array is used for light ray transmission, and light projected from the back passes through the refraction/reflection unit array and then is projected to human eyes, namely eyes of viewers.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims (9)

1. A transparent rear projection screen comprises a screen body (2), and is characterized in that the screen body (2) is a micro-nano bidirectional screen, and the micro-nano bidirectional screen comprises a transparent display area and a reflection area for changing the transmission direction of incident light; the reflecting area is composed of a transparent base material and micro-nano structure protrusions arranged on the side face of the transparent base material, and the micro-nano structure protrusions comprise incident faces and reflecting faces.

2. The transparent rear-projection screen according to claim 1, wherein the transparent substrate comprises inorganic glass, PMMA, PS, PC.

3. The transparent rear projection screen according to claim 1, wherein the incident surface of the micro-nano structure protrusion is designed according to the incident angle with reference to the size of a light spot; the reflecting surface of the micro-nano structure protrusion is designed according to an incident angle.

4. The utility model provides a projection system, is including base (1) and projection display equipment (3) that are used for fixed screen body (2), its characterized in that, the top face of base (1) is provided with screen use angle adjustment portion, and screen use angle adjustment portion includes two fixed connection respectively in fixing base (4) both sides face of base (1), sets up in the centre gripping section of thick bamboo of base (1) top face, sets up in arc wall (15) of fixing base (4) one side outer wall, sets up in the inside drive connection structure of fixing base (4).

5. The projection system of claim 4, wherein the driving connection structure comprises a connecting disc (18) rotatably connected to the inner wall of one side of the fixed seat (4), a movable toothed plate (19) slidably connected to the inner wall of the bottom of the fixed seat (4), teeth fixedly connected to the circumferential outer wall of the connecting disc (18), a through groove (12) formed in the outer wall of one side of the fixed seat (4), and an adjusting block (6) slidably connected to the inner wall of the through groove (12), and the teeth are engaged with the outer wall of the movable toothed plate (19);

one end of the adjusting block (6) is fixedly connected to one side face of the movable toothed plate (19).

6. A projection system according to claim 5, wherein a side of said holding cylinder near the bottom end is fixedly connected with a connecting column, and one end of said connecting column is fixedly connected with one end of said connecting disc (18).

7. A projection system according to claim 4, wherein the clamping cylinder is composed of two arc-shaped seats (13) with bottom ends forming a rotating fit through a rotating shaft, and one side surfaces of the two arc-shaped seats (13) are slidably connected to the inner wall of the arc-shaped groove (15) through sliding blocks.

8. A projection system according to claim 7, wherein the outer walls of the two arc-shaped seats (13) are fixedly connected with connecting blocks, and the inner walls of the two connecting blocks are provided with the same fastening pin (14);

a clamping block (16) is arranged on the circumferential inner wall of the clamping cylinder; and a protective pad (17) is arranged on the circumferential inner wall of the clamping cylinder at the bottom end.

9. A projection system according to claim 4, characterized in that the bottom outer wall of the base (1) is provided with a shock-absorbing pad (7); the outer wall of the bottom of the base (1) is provided with T-shaped supporting legs (9).

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