KR101109652B1 - Stereoscopic touch screen device - Google Patents

Abstract

The present invention relates to an infrared touch screen device, and more particularly, is installed at two or more corners of the touch screen to rotate at a predetermined angle, the infrared scanner for scanning the entire area of the touch screen in infrared, and the light guide to the edge of the touch screen A light guide unit configured to stack members to collect infrared light, a light receiver configured to receive infrared light collected at the end of the light guide unit, and a decoder to detect coordinates of the touched part by the amount of received light and the rotation angle of the infrared scanner. It is configured to include. According to the present invention, there is an advantage in that a three-dimensional touch point can be detected using a light guide part stacked with a rotating infrared scanner, and three-dimensional touch points can be detected even if the number of light emitting elements and light receiving elements is reduced. There is an advantage to that.

Description

Stereoscopic Touch Screen Device {STEREOSCOPIC TOUCH SCREEN DEVICES}

The present invention relates to a touch screen device, and more particularly, to a touch screen device capable of recognizing a touch point of a stereoscopic image using infrared light.

In general, the three-dimensional image representing the three-dimensional is achieved by the principle of stereo vision through two eyes, the parallax of two eyes, that is, binocular disparity that appears because the two eyes are about 65mm apart is the most important of the three-dimensional It can be called a factor. In other words, each of the left and right eyes sees different two-dimensional images, and when these two images are transmitted to the brain through the retina, the brain accurately fuses each other to reproduce the depth and reality of the original three-dimensional image.

Currently, technologies proposed for displaying three-dimensional stereoscopic images include stereoscopic image display by special glasses, autostereoscopic stereoscopic image display, and holographic display. The three-dimensional image display method using the special glasses is the polarization glasses method using the vibration direction or the rotation direction of the polarization, the time-division glasses method alternately presenting while switching the left and right images and the method of delivering light of different brightness in the left and right. Phosphorus concentration difference can be divided. In addition, the autostereoscopic three-dimensional display method has a parallax method and a semi-cylindrical lens arranged in front of each image corresponding to the left and right eyes through a longitudinal grid-shaped aperture to separate and observe the images. It can be divided into a lenticular method using a lenticular plate and an integral photography method using a lens plate shaped like a fly's eye. In addition, the holographic display method can obtain a three-dimensional stereoscopic image having all factors such as focus adjustment, constrained angle, binocular disparity, and motion parallax, which are factors that generate a three-dimensional effect. With a laser light reproduction hologram and a white light reproduction hologram, Are classified.

Since the 3D stereoscopic image technology is a technique using an optical illusion of a person, a signal cannot be input by directly touching a 3D stereoscopic image, and in reality, only a 2D plane signal can be input by touching a screen. .

Therefore, the present invention has been proposed to solve the above problems, and the present invention is to provide a three-dimensional touch screen device that can detect a three-dimensional touch point by using a light guide unit laminated with a rotating infrared scanner. will be.

Another object of the present invention is to provide a three-dimensional touch screen device that can detect a three-dimensional touch point even if the number of light emitting devices and light receiving devices is reduced.

The three-dimensional touch screen device according to an embodiment of the present invention for achieving the above object, is installed on two or more corners of the touch screen to rotate at a predetermined angle, the infrared scanner for scanning the entire area of the touch screen in the infrared, touch The light guide member is installed to be stacked on the edge of the screen to collect infrared light, the light receiving part is installed at the end of the light guide to receive the focused infrared light, and the light amount of the received infrared light and the rotation angle of the infrared scanner. And a decoder for detecting the coordinates.

Here, the infrared scanner is composed of an infrared light emitting element for emitting infrared light, a light emitting part for projecting the emitted infrared light to the touch screen, a motor for rotating the light transmitting part, and an angle measuring unit for measuring the angle of rotation of the light transmitting part. do.

In addition, the infrared scanner is composed of an infrared light emitting element for emitting infrared light, a light emitting part for projecting the emitted infrared light to the touch screen, a rotating part for rotating the light transmitting unit, and an angle measuring unit for measuring the angle of rotation of the light transmitting unit It is done.

Here, the rotating part is composed of a link part connected to the light transmitting part, a link supporting part for supporting the link part, two rotating electromagnets provided inside the light transmitting part, and a fixed electromagnet formed at the rear side corresponding to the rotating electromagnet. .

In this case, the light transmitting unit is characterized in that it further comprises a reflector for transmitting infrared light to the front of the light guide.

In addition, the light guide part has an incident pattern part having an incidence surface in which a front surface is formed in a step shape so that infrared rays are incident vertically, a scattering pattern part which is formed in a sawtooth shape on the back surface of the light guide part and scatters incident infrared rays; It characterized in that it consists of a reflector plate formed to surround the upper and lower surfaces and the scattering pattern portion formed in the 'c' shape.

In this case, the reflective plate is characterized in that a plurality of reference lines are formed at a predetermined interval apart.

Here, the infrared rays reflected by the reflector is characterized in that consisting of a reflective pattern portion formed to reflect.

The infrared scanner includes a plurality of infrared light emitting devices emitting infrared light, a plurality of rotating parts installed with the infrared light emitting devices, a link part connected to the rotating parts, and an angle measuring part measuring the moving angle of the rotating parts. It is done.

In addition, the light guide portion is characterized in that the light guide member with a long length from the lower layer to the upper layer is installed to be stacked.

The light receiving unit may include a light collecting lens for collecting infrared light and a light receiving device for receiving the focused infrared light at one place.

As described above, the three-dimensional touch screen device according to the present invention has an advantage of detecting a three-dimensional touch point by using a light guide part stacked with an infrared scanner that rotates.

In addition, the present invention has the advantage of detecting a three-dimensional touch point with a small number of light emitting elements and light receiving elements.

1 is a plan view schematically showing the configuration of a three-dimensional touch screen device according to the present invention.
2A and 2B are plan views illustrating the light transmission of infrared rays according to the rotation of the infrared scanner.
3 is a perspective view showing a first infrared scanner according to the present invention.
4 is a perspective view illustrating another embodiment of the first infrared scanner.
5 is a perspective view illustrating a first light guide unit according to the present invention.
6 is a cross-sectional view showing the configuration of the light guide member and the infrared light receiving process according to the present invention.
FIG. 7 is an exploded view illustrating the configuration of the light guide member of FIG. 5.
8 is a perspective view illustrating another embodiment of the light guide member of FIG. 5.
9 is a block diagram illustrating a connection configuration of a decoder according to the present invention.
10 is a cross-sectional view showing the configuration of a first infrared scanner according to a second embodiment of the present invention.
11 is a perspective view showing the configuration of a first infrared scanner according to a third embodiment of the present invention.
12 is a front view showing the configuration of a light guide portion and a light receiving portion according to a fourth embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings in order to fully understand the present invention. Embodiment of the present invention may be modified in various forms, the scope of the invention should not be construed as limited to the embodiments described in detail below. This embodiment is provided to more completely explain the present invention to those skilled in the art. Therefore, the shape of the elements in the drawings and the like may be exaggerated to emphasize a more clear description. It should be noted that the same members in each drawing are sometimes shown with the same reference numerals. Detailed descriptions of well-known functions and configurations that are determined to unnecessarily obscure the subject matter of the present invention are omitted.

1 is a plan view schematically showing the configuration of a three-dimensional touch screen device according to the present invention, Figures 2a and 2b is a plan view showing the light transmission of infrared rays according to the rotation of the infrared scanner.

As shown in Figure 1, Figure 2a and Figure 2b, the three-dimensional touch screen device according to the present invention is installed at two or more corners (preferably the corner of the screen, hereinafter referred to as the corner) of the touch screen 10 is infrared light emitting The first and second infrared scanners 20 and 30 scanning the entire area of the touch screen 10 while rotating the infrared light emitted from the elements 21 and 22 at a predetermined angle, and the touch screen 10 are scanned. The infrared light includes first, second and third light guides 40a, 40b and 40c, and first and second light receivers 51 and 52 which receive and detect the focused infrared light.

The first and second infrared scanners 20 and 30 are respectively installed at corners of both ends of the upper portion of the touch screen 10, and rotate the predetermined angle from side to side to scan the touch screen 10. Since the configurations of the first and second infrared scanners 20 and 30 are the same, only the configuration of the first infrared scanner 20 will be described in detail.

3 is a perspective view showing a first infrared scanner 20 according to the present invention, Figure 4 is a perspective view showing another embodiment of the first infrared scanner 20.

As shown in FIG. 3, the first infrared scanner 20 includes a first infrared light emitting device 21 emitting infrared light and a first infrared light emitting device 21 installed inside the touch screen 10. A first motor 28 and a first light-emitting part that support the first light-transmitting part 22 and the rear side of the first light-emitting part 22 and rotate the first light-emitting part 22 at a right and left at an angle. It consists of a 1st angle measuring part (not shown) which measures the rotation angle of (22).

At this time, the first infrared light emitting element 21 is preferably an infrared LED.

Infrared light emitted from the first infrared light emitting element 21 is formed in the first light reflecting portion 22 is formed in the center of the first reflecting mirror 23 is formed in the first reflecting mirror 23 concave inwardly of the first reflecting portion 22 The first reflector 23 widely reflects the first and second light guide members 41 so that the light guide members 41 are stacked to be projected from the lowermost layer to the uppermost layer of the first, second and third light guide parts 40a, 40b and 40c.

Here, as shown in FIG. 4, the first reflector 23a of the first infrared scanner 20 may be formed in a circular shape.

The second infrared scanner 30 which is not described above is the same as the first infrared scanner 20, the second infrared light emitting element (not shown), the second light transmitting part 32, the second motor 38, the second It consists of an angle measuring part (not shown).

In the three-dimensional touch screen device according to the present invention having the above-described configuration, the first infrared scanner 20 is operated by the first motor 28 in the state where the first infrared light emitting element 21 is operated. Rotate Accordingly, the light emitted from the first infrared light emitting element 21 is transmitted to the first, second and third light guide parts 40a, 40b and 40c through the first reflector 23. At this time, the first angle measuring part (not shown) detects the rotation angle of the first light transmitting part 22.

5 is a perspective view showing a first light guide portion 40a according to the present invention, FIG. 6 is a cross-sectional view showing the configuration of the light guide member 41 and infrared light receiving process according to the present invention, and FIG. An exploded view showing the configuration of the light guide member 41.

The first, second, and third light guides 40a, 40b, and 40c are installed on three surfaces except for the upper surface of the touch screen 10 to transmit light from the first and second infrared scanners 20 and 30. Infrared rays are collected and propagated to the first and second light receiving units 51 and 52. Here, since the configurations of the first, second, and third light guide portions 40a, 40b, and 40c are the same, only the configuration of the first light guide portion 40a will be described in detail.

As shown in FIG. 5, the first light guiding part 40a is installed to stack the light guiding member 41.

As shown in FIG. 6 and FIG. 7, the light guiding member 41 is formed in a rod shape having a cylindrical shape or an arbitrary shape, such as PMMA (polymethylmethacrylate) having good total reflection characteristics to infrared wavelengths, and the size of the touch screen 10. It can be processed easily.

The light guide member 41 is composed of an incident pattern portion 42, a scattering pattern portion 43, a reflective pattern portion 45, and a reflecting plate 44.

Here, the incident pattern part 42 is formed in a step shape on the surface in contact with the touch screen 10. The incident pattern part 42 is formed such that the angle between the infrared ray and the incident pattern part 42 is 90 ° so that the incident infrared rays scanned by the first and second infrared scanners 20 and 30 can be incident as much as possible. It is preferable to be. In this case, a scattering pattern part 43 for scattering infrared rays incident through the incident surface may be formed on the rear surface of the light guide member 41 opposite to the incident surface. As a result, the incident infrared rays are totally reflected and scattered by the scattering pattern part 43 without being emitted to the outside and propagated to the first light receiving part 51 through the internal reflection of the light guide member 41. The reflective pattern part 45 is formed on the other inclined surface of the incident pattern part 42 to prevent the infrared rays scattered from the scattering pattern part 43 from being emitted to the outside. In addition, it is preferable that the reflecting plate 44 is formed so as to surround the upper and lower surfaces except the incident surface and the back surface on which the scattering pattern portion 43 is formed in the light guide member 41 in a 'c' shape. The reflection plate 44 may increase the light receiving efficiency by preventing the incident infrared rays from being emitted to the outside through the scattering pattern part 43.

In addition, the reference line (L) is formed on the reflective plate 44 to be spaced apart.

The emitted infrared rays are incident on the light guide member 41 when the touch screen 10 is scanned, and the time taken for the first and second light receivers 51 and 52 to receive at the respective reference lines formed on the light guide member 41 is increased. It is stored in a control part (not shown) in advance. Here, when there is an external shock in the first and second infrared scanners 20 and 30, an error of a rotation angle or an error of a rotation time occurs. In this case, the correction is compared with the time previously stored in the controller (not shown). Accurate X / Y coordinates can be detected.

8 illustrates another embodiment of the light guide member 41.

As shown in FIG. 8, the V-shaped V-groove 47 may be formed on the rear surface of the light guide member 41 in the longitudinal direction of the light guide member 41.

The V-groove 47 is formed when the infrared rays incident through the incident pattern part 42 are reflected or grooved on the upper surface C of the light guide member 41 by the groove-top surface A of the V-groove 47. The infrared light reflected by the lower surface D of the light guide member 41 is continuously reflected by the upper surface C and the lower surface D of the light guide member 41 and received by the first light receiver 51.

The first and second light guiding portions 40a, 40b, and 40c formed by stacking the light guiding members 41 configured as described above are connected to both ends of the first and second light guiding portions 40b. Second light receiving parts 51 and 52 are provided. Here, the first and second light receiving parts 51 and 52 are composed of a plurality of light receiving elements 53. The light receiving elements 53 are disposed at both ends of the light guide members 41 constituting the second light guide part 40b. It is installed to detect the Z coordinate of the touched point when the user touches the amount of infrared light received by each light receiving element (53).

The operation of the infrared touch screen device according to the first embodiment of the present invention having the above configuration will be described below.

When the infrared light emitted from the first infrared scanner 20 to scan the entire area of the touch screen 10 reaches the first and second light guide parts 40a and 40b while crossing the touch screen 10, the light guide member 41 is used. Is incident through the incident pattern portion 42 formed on the incident surface of the light emitting surface and scattered by the scattering pattern portion 43 formed on the back surface. The scattered infrared rays are reflected by the reflection plate 44 surrounding the light guide member 41 and the reflection pattern part 45 formed on the other inclined surface of the incident pattern part 42 to be formed at the end of the light guide member 41. ) Is received.

Infrared light transmitted from the first infrared scanner 20 to the touch screen 10 reaches the first and second light guides 40a and 40b by crossing the touch screen 10 and the first and second light sources. The first light receiving portion 51 is received by the light guide portions 40a and 40b.

In addition, the infrared light transmitted from the second infrared scanner 30 to the touch screen 10 reaches the second and third light guide parts 40b and 40c by crossing the touch screen 10 and the second and third light sources. The second light receiving portion 52 is received by the light guide portions 40b and 40c.

9 is a block diagram illustrating a connection configuration of a decoder according to the present invention.

As shown in FIG. 9, the information on the amount of infrared light received by the first and second light receivers 51 and 52 is transmitted to the X / Y decoder 80. At the same time, the output (rotation angle) of the first and second angle measuring units (not shown) of the first and second infrared scanners 20 and 30 is also transmitted to the X / Y decoder 80 to The triangulation method of obtaining a triangular point by an angle may detect the X / Y coordinates of the touch point by the length of one side of the touch screen 10 and the rotation angles of the first and second infrared scanners 20 and 30.

In order to prevent the interference between the infrared light emitted from the first infrared scanner 20 and the infrared light emitted from the second infrared scanner 30, a frequency division method or a time division method may be used.

In the above-described frequency division method, the first and second infrared scanners 20 and 30 emit infrared rays having different wavelengths, and the first and second light receiving units 51 and 52 receive only infrared rays having the corresponding wavelengths, respectively. It is. In addition, the time division method is to make the infrared light emitting time different from the first and second infrared scanners 20 and 30. That is, the second infrared scanner 30 stops while the first infrared scanner 20 is operating and the first infrared scanner 20 alternately emits light in a manner that the first infrared scanner 20 stops while the second infrared scanner 30 is operating. will be. Therefore, the infrared rays transmitted from the first and second infrared scanners 20 and 30 are received by the mutual interference phenomenon of the first and second light receiving units 51 and 52 to be received.

10 is a cross-sectional view showing the configuration of the first infrared scanner 120 according to the second embodiment of the present invention.

As shown in FIG. 10, the first infrared scanner 120 according to the second embodiment of the present invention includes a first infrared light emitting element 121, a first light transmitting part 122, a first rotating part 124, and a first infrared light emitting device 121. It consists of one angle measuring unit (128).

In the above, the first rotating part 124 includes a first link part 125 hinged to the rear side of the first light transmitting part 122 so that the first light transmitting part 122 can be rotated left and right, and the first link part. The link support portion 129 supporting the 125, the two first rotating electromagnets 126 provided on both sides of the first light transmitting portion 122, and the first transmission electromagnet 126 corresponding to the first rotating electromagnet 126. Two first fixed electromagnets 127 formed on the rear side of the light portion 122, and a first angle measuring portion 128 for measuring the angle at which the first light transmitting portion 122 moves.

Here, the two first fixed electromagnets 127 are supplied with alternating power by the control of a control unit (not shown) to have magnetic force. Since the first rotating electromagnet 126 corresponding thereto is alternately attached to the first fixed electromagnet 127 having magnetic force, the first light transmitting part 122 swings from side to side. At this time, the first fixed electromagnet 127 alternately generates an induced current when it has a magnetic force, and the generated induced current is transmitted through the first rotating electromagnet 126 to transfer the first infrared light emitting element 121. Operate. Therefore, the first infrared light emitting element 121 is operated by an induced current transmitted when the first rotating electromagnet 126 is alternately attached to the first fixed electromagnet 127 even when there is no separate power supply.

Although the first rotating electromagnet 126 and the first fixed electromagnet 127 have been described as being wrapped with a winding of a metal used as a magnet, in the present invention, the winding may be selectively formed without using a metal.

The second infrared scanner (not shown) not described above has the same configuration as the first infrared scanner 120.

11 is a perspective view showing the configuration of a first infrared scanner 130 according to a third embodiment of the present invention.

As shown in FIG. 11, the first infrared scanner 130 includes a plurality of first infrared light emitting devices 131 and first infrared light emitting devices 131 that emit infrared light so that the plurality of first infrared light emitting devices 131 rotate left and right and are stacked. The first rotating part 132 formed, the first link part 133 hinged to the rear side of the first rotating part 132, and the motor part 134 for rotating the first rotating part 132 are formed. .

In the above, the height of the first infrared scanner 130 formed by stacking the first rotating part 132 is preferably formed to correspond to the height of the first, second, and third light guide parts 40a, 40b, and 40c. Do. That is, the stacked infrared light emitting devices 131 are formed to correspond to the stacked first, second, and third light guide parts 40a, 40b, and 40c, respectively.

The second infrared scanner (not shown) not described above has the same configuration as the first infrared scanner 130.

12 is a front view showing the configuration of the light guide portion 210 and the light receiving portion 220 according to the fourth embodiment of the present invention.

As shown in FIG. 12, the light guide portion 210 formed by being stacked is formed such that the light guide portion 210 having a longer length from the lower layer to the upper layer is stacked, and the light receiving portion 220 is formed at one end of the light guide portion 210. It consists of a light collecting lens 221 for collecting infrared light, and a light receiving element 222 formed in the lower portion of the light collecting lens to receive the focused infrared light in one place.

The above-described embodiments are to be understood in all respects as illustrative and not restrictive, the scope of the invention being indicated by the following claims rather than the foregoing description, and the meaning and scope of the claims and their equivalents. All changes or modifications derived from the concept shall be construed as being included in the scope of the present invention.

10: touch screen 20: first infrared scanner
21: first infrared light emitting element 22: first light emitting part
23: first reflecting mirror 24: first rotating part
25: first link portion 26: first rotating electromagnet
27: first fixed electromagnet 28: first motor
30: second infrared scanner 32: second floodlight
35: second link portion 38: second motor
40a: first light guide portion 40b: second light guide portion
40c: third light guide portion 41: light guide member
42: incident pattern portion 43: scattering pattern portion
44: reflector 45: reflection pattern portion
51; First light receiver 52: Second light receiver
80: decoder

Claims (11)

An infrared scanner installed at two or more corners of the touch screen to rotate at a predetermined angle, and scan the entire area of the touch screen with infrared rays;
A light guide unit configured to stack the light guide member on the edge of the touch screen to collect infrared light;
A light receiving unit installed at an end of the light guide unit to receive the focused infrared light;
And a decoder which detects coordinates of the touched part at the amount of received infrared light and the rotation angle of the infrared scanner. The method of claim 1,
The infrared scanner
An infrared light emitting device for emitting infrared light;
A light emitting unit for transmitting the emitted infrared rays to the touch screen;
A motor for rotating the light projecting unit;
A three-dimensional touch screen device, characterized in that consisting of an angle measuring unit for measuring the rotation angle of the light transmitting portion. The method of claim 1,
The infrared scanner
An infrared light emitting device for emitting infrared light;
A light emitting unit for transmitting the emitted infrared rays to the touch screen;
Two rotating electromagnets provided inside the light transmitting unit;
A rotating part configured to rotate the light transmitting part by being composed of a link part connected to the light transmitting part, a link support part supporting the link part, and a fixed electromagnet corresponding to the rotating electromagnet;
Three-dimensional touch screen device, characterized in that consisting of an angle measuring unit for measuring the rotation angle of the light transmitting portion. 4. The method according to claim 2 or 3,
The light emitting unit is a three-dimensional touch screen device, characterized in that further comprising a reflector for transmitting infrared light to the front of the light guide. The method of claim 1,
The light guide member is
An incident pattern portion having a front surface formed in a step shape and having an incident surface such that infrared rays are incident vertically;
Scattering pattern portion formed on the back surface of the light guide portion to scatter the incident infrared rays;
The three-dimensional touch screen device, characterized in that consisting of a reflecting plate formed to surround the upper and lower surfaces and the scattering pattern portion formed in the 'c' shape other than the incident surface. 6. The method of claim 5,
Three-dimensional touch screen device, characterized in that a plurality of reference lines are formed on the reflecting plate spaced apart. 6. The method of claim 5,
The light guide member is
Three-dimensional touch screen device, characterized in that it further comprises a reflective pattern portion formed to reflect the infrared light reflected on the reflecting plate. 6. The method of claim 5,
And a V-groove for reflecting the infrared rays incident on the rear surface of the light guide member to the upper and lower surfaces thereof. The method of claim 1,
The infrared scanner
A plurality of infrared light emitting elements emitting infrared light;
A plurality of rotating parts in which infrared light emitting devices are installed;
A motor for rotating the pivot;
Three-dimensional touch screen device, characterized in that it comprises an angle measuring unit for measuring the angle of rotation. The method of claim 1,
The light guide portion
The three-dimensional touch screen device, characterized in that the light guide member is a long length from the lower layer to the upper layer is stacked. The method of claim 1,
The light receiving unit
A condenser lens for condensing infrared rays;
Three-dimensional touch screen device, characterized in that consisting of a light receiving element for receiving the collected infrared light in one place.

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