CN212647439U - Touch device based on infrared laser - Google Patents

Abstract

The utility model discloses a touch device based on infrared laser, which comprises a touch screen, an optical sensor and a laser source, wherein the optical sensor and the laser source are both fixed on one side edge of the touch screen; the touch screen comprises a touch screen body, wherein the number of optical sensors is at least two, and two optical sensors are arranged at two top corners of the touch screen body respectively; the laser source is arranged between the optical sensors arranged at the two top corners of the touch screen, and infrared laser emitted by the laser source is distributed on the surface of the touch screen. The utility model discloses can reduce the occupation space of apex angle, reduce the assembly degree of difficulty, can also avoid appearing the self-excited condition of disturbing simultaneously.

Description

Touch device based on infrared laser

Technical Field

The utility model relates to a touch-sensitive screen technical field especially relates to a touch equipment based on infrared laser.

Background

Touch screen technology has become popular and more users have become accustomed to using touch screens for human-computer interaction. At present, the mainstream touch screens mainly comprise a resistance type touch screen, a capacitance type touch screen, an infrared touch screen, an acoustic wave touch screen and a laser type touch screen. For the laser touch screen, the laser transceiving elements are all arranged below the touch screen body, and other components are not required to be arranged on the upper side, the left side and the right side of the touch screen body, so that the upper side, the left side and the right side of the touch screen body can basically form a zero frame, and the laser touch screen is more and more widely applied to various industries.

The prior art with publication number CN103186295A discloses a touch screen positioning device and a touch point calculation method in 2013, 4 and 1. The device includes the display screen, still includes: the two linear lasers with the divergence angles of 90 degrees or more are arranged on two vertex angles on one side of the display screen and are positioned in front of the display screen; the two photoelectric detectors are correspondingly arranged on two vertex angles on the same side of the display screen with the two linear lasers and are positioned behind the display screen, and are used for detecting the positions of light spots; the two imaging lenses are arranged between the photoelectric detector and the display screen and are used for converging the reflected light of the touch object to the photoelectric detector; the data processing module is respectively connected with the display screen and the photoelectric detector and used for calculating the coordinates of the touch points according to the positions of the light spots detected by the photoelectric detector and sending the calculated coordinates of the touch points to the display screen for display. The technology overcomes the distortion problem, and makes the touch point positioning more accurate. However, in practical application, the technology still has the following defects:

1. because photoelectric detector and a word line laser instrument all install on two apex angles on the same side of display screen, and the space of apex angle is comparatively narrow, will increase the assembly degree of difficulty certainly. Meanwhile, the photoelectric detector is close to the word line laser, so that self-excitation interference is easily caused.

2. The technology can only passively receive the reflected light source, and the function is single.

3. The photoelectric detectors are only arranged on two top corners on the same side of the display screen, and the problem that false touch points are easy to occur during multi-point touch cannot be well solved.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the above-mentioned problem that exists among the prior art, provide a touch equipment based on infrared laser, the utility model discloses can reduce the occupation space of apex angle, reduce the assembly degree of difficulty, can also avoid appearing the condition of self-excited interference simultaneously.

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

the utility model provides a touch equipment based on infrared laser which characterized in that: the optical sensor and the laser source are fixed on one side edge of the touch screen; the touch screen comprises a touch screen body, wherein the number of optical sensors is at least two, and two optical sensors are arranged at two top corners of the touch screen body respectively; the laser source is arranged between the optical sensors arranged at the two top corners of the touch screen, and infrared laser emitted by the laser source is distributed on the surface of the touch screen.

The number of the laser sources is two, and an optical sensor is arranged between the laser sources.

The touch device further comprises a touch pen for touching on the touch screen.

The touch pen comprises a pen container, a battery, a switch and an emission assembly for emitting infrared laser, wherein the emission assembly and the battery are fixed in the pen container, and the emission assembly is fixedly connected with the battery; the switch is arranged on the surface of the pen container and used for controlling the opening and closing of the emission assembly.

The transmitting component comprises a laser tube and a reflecting cone corresponding to the laser tube, and infrared laser transmitted by the laser tube is vertically reflected through the conical surface of the reflecting cone.

The pen container is further provided with a charging interface connected with a battery.

The touch pen is provided with a magnetic attraction piece, and the touch pen is attracted on the touch screen through the magnetic attraction piece.

The magnetic attraction piece is of an annular structure and is arranged at two ends of the touch pen respectively.

Adopt the utility model has the advantages of:

1. the utility model discloses all fix optical sensor and laser source at one of them side of touch-sensitive screen, nevertheless inject the concrete position of optical sensor and laser source, and is concrete, and two apex angles departments of touch-sensitive screen respectively are provided with an optical sensor, and the laser source is located to set up between the optical sensor of two apex angles departments of touch-sensitive screen. This touch equipment of specific structure can effectively reduce the occupation space of apex angle, reduces the assembly degree of difficulty, simultaneously because laser source and optical sensor are far away, consequently can also avoid appearing the condition of self-excited interference to guarantee that the touch effect is better.

2. The utility model discloses be provided with optical sensor between the laser source, still set up other optical sensor except the optical sensor of apex angle department in other words, its advantage lies in can getting rid of false touch point when carrying out multi-touch, effectively discerns true touch body, the recognition accuracy when having promoted multi-touch.

3. The utility model discloses a touch pen is favorable to the user to conveniently carry out touch operation or writing operation to touch equipment.

4. The utility model discloses establish the touch pen into the structure that can launch infrared laser, can realize the high accuracy location of the touch body through the infrared laser of touch pen transmission.

5. The utility model discloses a conical surface vertical reflection infrared laser signal of reflection cone is favorable to infrared laser's even reflection.

6. The utility model discloses be provided with magnetism on the touch-sensitive pen and inhale the piece, inhale the piece through magnetism and can enough prevent that the touch-sensitive pen from losing, also can conveniently adsorb the touch-sensitive pen on the touch-sensitive screen when not using.

Drawings

FIG. 1 is a schematic view showing a configuration in the case where the number of optical sensors is two in example 1;

FIG. 2 is a schematic view showing a structure in the case where the number of optical sensors exceeds two in example 1;

FIG. 3 is a schematic view of a structure for calculating a touch object in embodiment 1;

FIG. 4 is a schematic structural view of embodiment 3;

FIG. 5 is a schematic structural diagram of a touch pen according to embodiment 3;

FIG. 6 is a schematic view of one of the structures of the radiation module in embodiment 3;

FIG. 7 is another schematic structural view of a radiation module according to embodiment 3;

FIG. 8 is a flowchart of the operation of example 3;

the labels in the figure are: 1. the device comprises a touch screen, 2, an optical sensor, 3, a laser source, 4, a touch pen, 5, a pen container, 6, a battery, 7, a switch, 8, an emission component, 9, a laser tube, 10, a reflection cone, 11, a charging interface, 12, a magnetic attraction component, 13, a touch body, 14 and false touch points.

Detailed Description

The present invention will be further explained with reference to the drawings and examples.

Example 1

The utility model provides a touch equipment based on infrared laser, as shown in fig. 1, 2, it includes touch-sensitive screen 1, optical sensor 2 and laser source 3 all fix in touch-sensitive screen 1 one of them side, and preferred optical sensor 2 and laser source 3 all fix in touch-sensitive screen 1's lower side department. The number of the optical sensors 2 is at least two, and two optical sensors 2 are respectively arranged at two top corners of the lower side edge of the touch screen 1; the number of the laser sources 3 is two, the laser sources 3 are located between the optical sensors 2 arranged at two corners of the touch screen 1, and the infrared laser emitted by the laser sources 3 is distributed on the surface of the touch screen 1.

In this embodiment, when the number of the optical sensors 2 is two, the two optical sensors 2 are respectively disposed at two top corners of the lower side of the touch screen 1, but the touch device with the structure is only suitable for a single touch object 13to touch, and if there are a plurality of touch objects 13, a false touch point 14 will appear as shown in fig. 1. When the number of the optical sensors 2 exceeds two, the remaining optical sensors 2 may be disposed between the laser light sources 3 except for two of the optical sensors 2 disposed at the apex angle. The touch device with the structure is not only suitable for single touch body 13touch, but also suitable for multi-touch body 13touch, and due to the fact that the optical sensors 2 are arranged, false touch points 14 can be effectively eliminated, and therefore the real touch body 13 can be effectively recognized.

In this embodiment, in order to ensure a better touch effect, it is preferable that an optical filter is further disposed in front of the lens of the optical sensor 2, for filtering an interference light source entering the optical sensor 2.

In the present embodiment, the Touch object 13 mainly reflects the infrared laser light to recognize the Touch object 13, which is equivalent to a passive operation mode, and a specific Touch recognition principle is described by taking A, B two optical sensors 2 as an example, as shown in fig. 3, a distance between A, B two optical sensors 2, that is, a bottom side is L, and light rays in directions of Touch object 13Touch, L1 and L2 are respectively received by the optical sensor No. a 2 and the optical sensor No. B2. The angular orientation of the touch object 13 on the optical sensor 2 can be obtained from the imaging position of the touch object 13 on the optical sensor 2. Given an angle α of projection of the touching body 13 on the optical sensor No. a 2, an angle β of projection of the touching body 13 on the optical sensor No. B2, and a perpendicular H to the base line L from the touching body 13, H, which is a y coordinate of the touching body 13, can be obtained from the formula H (cos α/sin α) + H (cos β/sin β) = L, and then the horizontal distance from the touching body 13Touch to the optical sensor No. a 2, that is, the x coordinate of the touching body 13 can be obtained from the formula x = H (cos α/sin α).

Example 2

This example is substantially the same as example 1, with the main differences:

the touch device further comprises a touch pen 4 used for touching the touch screen 1, and the touch pen 4 can replace a human finger to touch. The touch pen 4 can be adsorbed on the touch screen 1 through the adsorbing members such as the magnet, so that the touch pen is prevented from being lost on the one hand, and the touch pen is convenient for a user to take.

Example 3

This example is substantially the same as example 1, with the main differences:

as shown in fig. 4 and 5, the touch device further includes a touch pen 4 for touching on the touch screen 1, the touch pen 4 includes a pen container 5, a battery 6, a charging interface 11, a switch 7 and an emitting assembly 8 for emitting infrared laser, the emitting assembly 8 and the battery 6 are both fixed in the pen container 5, and the emitting assembly 8 is fixedly connected with the battery 6; the switch 7 is arranged on the surface of the pen container 5 and is used for controlling the opening and closing of the emission component 8; the charging interface 11 is arranged on the surface of the pen container 5 and used for charging the battery 6.

In this embodiment, the touch pen 4 is provided with the magnetic attraction member 12, the magnetic attraction member 12 may be of an annular structure and is respectively disposed outside or inside the two ends of the touch pen 4, and the magnetic attraction member 12 is attracted to the touch screen 1 during use.

In this embodiment, as shown in fig. 6 and 7, the emission assembly 8 includes a laser tube 9 and a reflection cone 10 corresponding to the laser tube 9, and the infrared laser emitted from the laser tube 9 is vertically reflected by the conical surface of the reflection cone 10. The reflective cone 10 includes a cylindrical section and a conical section which are integrally formed, and when the reflective cone is installed, the cylindrical section can be made to correspond to the laser tube 9, and the conical section can be made to correspond to the laser tube 9. In either way, the infrared laser light emitted from the laser tube 9 is reflected perpendicularly through the conical surface of the cone segment.

In this embodiment, since the touch device can realize the recognition of the touch object 13 by reflecting the infrared laser light by the touch object 13, the touch device has a passive operating mode. And because the touch pen 4 capable of emitting infrared laser is arranged, the touch body 13 can be identified through the cooperation of the touch pen 4 and the optical sensor 2 in actual use, and further the touch device has an active working mode. As shown in fig. 8, the system is initialized after the touch device is powered on, the laser source 3 is turned off after initialization, the optical sensor 2 detects the infrared laser signal, and if the infrared laser signal is detected, it indicates that the touch pen 4 sends the infrared laser signal on the touch screen 1 at this time, so that the touch body 13 is positioned in an active working mode, and coordinates of the touch body 13 are output after the positioning is completed. If the infrared laser signal is not detected, the passive working mode is entered, the laser source 3 is turned on again, the optical sensor 2 collects the detection signal, if the infrared laser signal is detected, it indicates that the touch object 13 is touched, and the coordinate of the touch object 13 can be obtained and output according to the formula described in embodiment 1.

Any feature disclosed in this specification may, unless stated otherwise, be replaced by alternative features serving the same, equivalent or similar purpose; all of the disclosed features, or all of the method or process steps, may be combined in any combination, except mutually exclusive features and/or steps.

Claims (8)

1. The utility model provides a touch equipment based on infrared laser which characterized in that: the touch screen comprises a touch screen (1), an optical sensor (2) and a laser source (3), wherein the optical sensor (2) and the laser source (3) are fixed on one side edge of the touch screen (1); the number of the optical sensors (2) is at least two, and two optical sensors (2) are respectively arranged at two vertex angles of the touch screen (1); the laser source (3) is arranged between the optical sensors (2) arranged at two top corners of the touch screen (1), and infrared laser emitted by the laser source (3) is distributed on the surface of the touch screen (1).

2. An infrared laser based touch device as claimed in claim 1, wherein: the number of the laser sources (3) is two, and the optical sensors (2) are arranged between the laser sources (3).

3. An infrared laser based touch device as claimed in claim 1, wherein: the touch device further comprises a touch pen (4) used for touching the touch screen (1).

4. An infrared laser based touch device as claimed in claim 3, wherein: the touch pen (4) comprises a pen container (5), a battery (6), a switch (7) and an emission assembly (8) for emitting infrared laser, wherein the emission assembly (8) and the battery (6) are fixed in the pen container (5), and the emission assembly (8) is fixedly connected with the battery (6); the switch (7) is arranged on the surface of the pen container (5) and is used for controlling the opening and closing of the emission component (8).

5. An infrared laser based touch device as claimed in claim 4, wherein: the emission component (8) comprises a laser tube (9) and a reflection cone (10) corresponding to the laser tube (9), and infrared laser emitted by the laser tube (9) is vertically reflected through the conical surface of the reflection cone (10).

6. An infrared laser based touch device as claimed in claim 4, wherein: the pen container (5) is further provided with a charging interface (11) connected with the battery (6).

7. An infrared laser based touch device as claimed in any one of claims 3to 6, wherein: the touch pen is characterized in that a magnetic part (12) is arranged on the touch pen (4), and the touch pen (4) is adsorbed on the touch screen (1) through the magnetic part (12).

8. An infrared laser based touch device as claimed in claim 7, wherein: the magnetic attraction piece (12) is of an annular structure and is arranged at two ends of the touch pen (4) respectively.

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