CN217955068U

CN217955068U - Interactive sand table device based on grating waveguide

Info

Publication number: CN217955068U
Application number: CN202221601673.9U
Authority: CN
Inventors: 叶志成; 郑君; 林伟强
Original assignee: Qidong Maiwei Optoelectronics Co ltd
Current assignee: Qidong Maiwei Optoelectronics Co ltd
Priority date: 2022-06-25
Filing date: 2022-06-25
Publication date: 2022-12-02
Anticipated expiration: 2032-06-25

Abstract

The utility model discloses an interactive sand table device based on grating waveguide relates to sand table in kind and electron sand table technical field, including display module, photoelectric sensor module one, signal transmission module, sand table display panel, photoelectric sensor module two, mutual treatment facility optical touch film, laser pen, optical touch film includes waveguide and grating. The utility model discloses use unmodulated laser to pass the waveguide from the waveguide upper surface incidence, a part of light is through transversely propagating the waveguide side along the Y direction in upper waveguide is coupled to upper waveguide to upper one-dimensional grating one, another part light incides lower floor one-dimensional grating two after passing upper one-dimensional grating, transversely propagate lower floor's waveguide side along the X direction in being coupled lower floor's waveguide by lower floor one-dimensional grating two, the emergent light point is gathered to the photoelectric sensor module in the waveguide side, the analysis produces corresponding current change because of the side emergent light of X direction and Y direction, the location incident light point position, realize the laser light point location.

Description

Interactive sand table device based on grating waveguide

Technical Field

The utility model relates to a sand table in kind and electron sand table technical field, concretely relates to interactive sand table device based on grating waveguide.

Background

The interactive sand table is a display platform for realizing audio-visual integration by using a computer technology as a core, is mainly applied to building display in the real estate industry and image engineering of government organs, and is also commonly used in the fields of multimedia teaching, military simulation and the like of schools.

At present, most of interactive sand tables are controlled by a handheld touch terminal screen, different modules are selected on the touch screen, and a laser pen is matched to indicate on the sand table, so that the function of demonstration and explanation is realized. Although the device can realize simple entity and virtual two-aspect synchronous display, audiences still cannot quickly know the specific position of the region in the sand table, and an interpreter cannot realize complete synchronization during interpretation, namely cannot realize multi-finger viewing, so that the immersion experience of the audiences is influenced, and the interpretation difficulty of the interpreter is increased.

SUMMERY OF THE UTILITY MODEL

The utility model provides an interactive sand table device based on grating waveguide to solve the problem of proposing among the above-mentioned background art.

In order to solve the technical problem, the utility model discloses the technical scheme who adopts is:

the utility model provides an interactive sand table device based on grating waveguide, includes display module, photoelectric sensor module one, signal transmission module, sand table display panel, two-dimensional grating, photoelectric sensor module two, mutual processing equipment, optics touch-control membrane, laser pen, optics touch-control membrane includes waveguide and grating, the side laminating of waveguide has photoelectric sensor, display module and mutual processing equipment pass through signal transmission module and photoelectric sensor module two and link to each other, the laser pen can emit modulated laser and unmodulated laser.

The utility model discloses technical scheme's further improvement lies in: the laser light spot is reflected by the side surface of the cabinet body and then vertically enters a display light source plane, the incident light is coupled through the grating, coupled light is transversely transmitted to the side edge of the waveguide to be emitted along the inner side of the waveguide and finally projected onto the surface of the photoelectric sensor, the grating can comprise a one-dimensional grating I and a one-dimensional grating II and can also comprise a two-dimensional grating, modulated laser is incident from the upper surface of the waveguide to penetrate through the waveguide, one part of light is coupled into an upper-layer waveguide through an upper-layer one-dimensional grating and transversely transmitted to the side edge of the waveguide along the Y direction, the other part of light penetrates through the upper-layer one-dimensional grating and then enters a lower-layer one-dimensional grating and is coupled into a lower-layer waveguide through the lower-layer one-dimensional grating and transversely transmitted to the side edge of the lower-layer waveguide along the X direction, the photoelectric sensor module collects emergent light spots on the side surface of the waveguide, corresponding current changes caused by the emergent light at the X direction and the Y direction are analyzed, the position of the incident light spot is positioned, and the laser light spot is positioned, and the waveguide is transparent.

The utility model discloses technical scheme's further improvement lies in: the grating is configured to enable incident light to be coupled in the waveguide and transversely transmitted to the side of the waveguide in the mutually crossed direction to be emitted by adjusting and combining the gratings in different directions and periods, the emitted coupled light corresponds to the incident light point positions one by one, and the incident light point positions can be obtained through the side emitting positions obtained by detecting through the first photoelectric sensor module.

The utility model discloses technical scheme's further improvement lies in: the detection surface of the first photoelectric sensor module is tightly attached to the side surface of the waveguide, and the signal transmission module and the second photoelectric sensor module transmit current information to the interactive processing equipment.

The utility model discloses technical scheme's further improvement lies in: the signal transmission module and the photoelectric sensor module can be selected in a wired or wireless mode, the wired mode comprises bus connection, and the wireless mode comprises wireless connection modes such as WIFI and Bluetooth.

The utility model discloses technical scheme's further improvement lies in: the interactive processing equipment is in bidirectional interaction with the display module, the display module comprises a sand table display panel, a sand table surface building is arranged above the sand table display panel, and the bidirectional interaction comprises that laser spot information on the sand table can be displayed on a large screen in real time and laser spot information on the large screen can be displayed on the sand table in real time.

Owing to adopted above-mentioned technical scheme, the utility model discloses relative prior art, the technological progress who gains is:

1. the utility model provides an interactive sand table device based on grating waveguide, accessible waveguide, grating and photoelectric sensor's cooperation, and with the coupling light and the incident light point position one-to-one of intercrossing's direction lateral propagation in the waveguide, accessible photoelectric sensor module one surveys the side outgoing position that obtains and obtains the incident light point, has realized the position that sand table and large-screen display equipment's two-way interaction function is through setting up the grating waveguide, can be applicable to the position perception of sand table in kind and electron sand table simultaneously.

2. The utility model provides an interactive sand table device based on grating waveguide, this device simple structure and powerful for the instructor can accomplish completely synchronous when explaining, realizes that the institute indicates to see promptly, increases spectator's the experience of immersing and feels, reduces the explanation degree of difficulty of instructor simultaneously, and this device low cost is fit for large-scale production, and is applicable to the interactive use of jumbo size sand table.

Drawings

Fig. 1 is a schematic structural diagram illustrating the structure and working principle of the waveguide grating according to the present invention;

fig. 2 is a schematic diagram of a superimposed structure of two one-dimensional waveguide gratings in an embodiment of the present invention;

fig. 3 is a schematic diagram of a two-dimensional waveguide grating structure according to an embodiment of the present invention;

fig. 4 is a schematic view of the interactive sand table structure of the present invention;

fig. 5 is a flow chart of the interactive sand table structure of the present invention;

fig. 6 is a schematic view of the optical direction of the optical touch film of the present invention.

In the figure: 1. a waveguide; 2. a grating; 3. a photoelectric sensor; 4. unmodulated laser light; 5. a one-dimensional grating I; 6. a one-dimensional grating II; 7. a laser pen; 8. modulating laser; 9. building the surface of a sand table; 10. a second photoelectric sensor module; 11. an interactive processing device; 12. a display module; 13. an optical touch film; 14. a first photoelectric sensor module; 15. a signal transmission module; 16. a sand table display panel; 17. a two-dimensional grating.

Detailed Description

The present invention will be described in further detail with reference to the following examples:

example 1

As shown in fig. 1-6, the utility model provides an interactive sand table device based on grating waveguide, including display module 12, photoelectric sensor module 14, signal transmission module 15, sand table display panel 16, two-dimensional grating 17, two 10 of photoelectric sensor module, mutual treatment facility 11, optics touch-control membrane 13, laser pen 7, optics touch-control membrane 13 includes waveguide 1 and grating 2, waveguide 1 is the transparence, waveguide 1's side laminating has photoelectric sensor 3, display module 12 passes through signal transmission module 15 and two 10 of photoelectric sensor module with mutual treatment facility and links to each other, laser pen 7 can launch modulated laser 8 and

unmodulated laser

4, 4 luminous points of unmodulated laser are through cabinet side surface reflection back vertical incidence to the display light source plane, incident light is through grating 2 coupling, coupled light is along the outgoing of 2 directions lateral propagation to the waveguide side of perpendicular to the grating, final projection is on photoelectric sensor 3's surface, grating 2 is including one-dimensional grating 5 and two 6 of one-dimensional grating.

In the embodiment, when unmodulated laser 4 enters the waveguide from the upper surface of the waveguide and penetrates through the waveguide, a part of light is coupled into the upper-layer waveguide through the upper-layer one-dimensional grating I5 and transversely propagates to the side edge of the waveguide along the Y direction, the other part of light enters the lower-layer one-dimensional grating II 6 after passing through the upper-layer one-dimensional grating I5 and is coupled into the lower-layer waveguide through the lower-layer one-dimensional grating II 6 and transversely propagates to the side edge of the lower-layer waveguide along the X direction, the photoelectric sensor module collects emergent light spots on the side surface of the waveguide, corresponding current changes generated by emergent light at the X direction and the Y direction are analyzed, the position of the incident light spot is positioned, and laser light spot positioning is realized.

Example 2

As shown in fig. 1-6, on the basis of embodiment 1, the utility model provides a technical solution: preferably, the grating 2 may be designed as a two-dimensional grating 17, the unmodulated laser 4 enters from the upper surface of the waveguide 1, passes through the waveguide 1, and is coupled into the waveguide 1 through the two-dimensional grating 17, the coupled light transversely propagated in the waveguide 1 in the direction of crossing each other corresponds to the incident light point position one by one, the incident light point position is obtained at the side emitting position obtained by detecting through the first photoelectric sensor module 14, the detection surface of the first photoelectric sensor module 14 is tightly attached to the side surface of the waveguide 1, and the signal transmission module 15 and the second photoelectric sensor module 10 transmit the current information to the interactive processing device 11.

In the present embodiment, the waveguide 1 has an upper surface and a side surface, the side surface is disposed perpendicular to the upper surface, the waveguide 1 is connected to the grating 2 at the periodic structure, the unmodulated laser light 4 is incident from the upper surface of the waveguide 1, and the antireflection structure is disposed on the upper surface and the side surface of the waveguide 1, and the antireflection grating can make the diffracted light leave the waveguide 1 sufficiently, thereby improving the utilization efficiency.

When the incident light is vertically incident on the grating 2 through the waveguide 1, the angle θ between the reflected light and the normal is described by the following formula:

wherein n is ₁ Is the refractive index of the waveguide and,

is the included angle between the reflected light and the normal line, T is the period of the metal grating, i is the incident angle of the laser irradiated to the grating after being reflected by the cabinet body, m is the diffraction order, wherein the value is plus or minus 1,

for this reason, since the wavelength of the reflected light is a single wavelength of incident light, the wavelength of the reflected light coincides with the wavelength of the incident light.

Angle of total reflection of waveguide 1

Described by the following formula:

the reflected light transversely propagates to the side edge of the waveguide 1 along the direction perpendicular to the grating and is emitted, and is received by the photoelectric sensor 3, through the signal transmission module 15, an electric signal generated by the photoelectric sensor module I14 is transmitted to the interactive processing equipment 11 to identify and process a position signal, the position signal information is transmitted to the display module through the signal transmission module 15, display information related to the position information is displayed in real time, and through the signal transmission module 15, the electric signal generated by the photoelectric sensor module I14 is transmitted to the interactive processing equipment 11 to identify and process the position signal, the position signal information is transmitted to the display module 12 through the signal transmission module 15, the display information related to the position information is displayed in real time, the side surface of the waveguide 1 can also be set to be an inclined surface, the effective surface of the photoelectric sensor 3 can be completely attached to the inclined surface, the coupled light directly irradiates the effective surface of the photoelectric sensor 3 after being emitted from the inclined surface, the contact area is increased, and the transmission efficiency is improved.

The working principle of the interactive sand table device based on the grating waveguide is described in detail below.

As shown in fig. 1-6, in use, the diffraction effect of the grating 2 can be utilized, the unmodulated laser 4 emitted by the laser pen passes through the combined action of the one-dimensional grating-one 5 and the one-dimensional grating-two 6 or the action of the two-dimensional grating 17, and is finally received by the photoelectric sensor 3, so that the positioning of the light spot of the unmodulated laser 4 is realized, the incident light spot position can be obtained through the side emitting position detected by the photoelectric sensor module-one 14, and then the incident light spot position is subjected to information interaction with the sand table surface building 9 through the signal transmission module 15 and the position transmitted above the sand table display panel 16.

The present invention has been described in detail with reference to the above general description, but it will be apparent to one of ordinary skill in the art that modifications and improvements can be made to the invention. Therefore, modifications or improvements without departing from the spirit of the invention are within the scope of the invention.

Claims

1. The utility model provides an interactive sand table device based on grating waveguide, includes display module (12), photoelectric sensor module (14), signal transmission module (15), sand table display panel (16), two-dimensional grating (17), photoelectric sensor module two (10), interactive processing equipment (11), optics touch-control membrane (13), laser pen (7), its characterized in that: optical touch film (13) include waveguide (1) and grating (2), the side laminating of waveguide (1) has photoelectric sensor (3), display module (12) pass through signal transmission module (15) and photoelectric sensor module two (10) with mutual processing equipment and link to each other, laser pen (7) can launch modulation laser (8) and unmodulated laser (4).

2. The interactive grating waveguide-based sand table apparatus of claim 1, wherein: the grating (2) can comprise a one-dimensional grating I (5) and a one-dimensional grating II (6), and can also comprise a two-dimensional grating (17), and the combination direction and period of the grating can be adjusted to meet the coupling and transmission of the waveguide to the light.

3. The interactive grating waveguide-based sand table device of claim 1, wherein: the non-modulated laser (4) is incident from the upper surface of the waveguide (1), penetrates through the waveguide (1), is incident on the grating (2), is coupled into the waveguide (1) by the grating (2), transversely propagates to the side edge of the waveguide along the direction vertical to the grating, and is emitted, the positions of coupled light transversely propagates in the waveguide (1) in the direction crossing with each other are in one-to-one correspondence with the positions of incident light points, and the waveguide (1) is transparent.

4. The interactive grating waveguide-based sand table apparatus of claim 1, wherein: the detection surface of the first photoelectric sensor module (14) is tightly attached to the side surface of the waveguide (1), and the signal transmission module (15) and the second photoelectric sensor module (10) transmit current information to the interactive processing equipment (11).

5. The interactive grating waveguide-based sand table device of claim 1, wherein: the signal transmission module (15) and the second photoelectric sensor module (10) can be in a wired or wireless mode.

6. The interactive grating waveguide-based sand table apparatus of claim 1, wherein: the interactive processing device (11) and the display module (12) are in bidirectional interaction, the display module (12) comprises a sand table display panel (16), a sand table surface building (9) is arranged above the sand table display panel (16), and the bidirectional interaction comprises that laser spot information on a sand table can be displayed on a large screen in real time and laser spot information on the large screen can be displayed on the sand table in real time.