TWM617636U - Three-dimensional coordinate touch device - Google Patents

Abstract

The present model discloses a three-dimensional coordinate touch device, which includes: a display module for generating an image light; a touch module, which is arranged above the display module, and the touch module is used for sensing A three-axis position of a touch object; a light-transmitting element disposed above the touch module, the light-transmitting element for the image light to transmit, and for converting the transmitted image light into a floating image, the The floating image is displayed above the light-transmitting element; the present invention uses the touch module to sense the touch position, and can report the point of the touch object in the X, Y, and Z three-axis coordinates. At the same time, the touch The module can use a capacitive touch panel, and the touch sensing area is large, which can effectively reduce the dead angle of touch sensing.

Description

Three-dimensional coordinate touch device

A touch device, in particular, refers to a touch device that combines floating imaging and three-dimensional coordinate recognition.

Please refer to FIG. 6, which is an Air Interactive Display. The air touch display uses a double-sided angular lens matrix (DCRA) to generate a floating image 611, combined with infrared rays that can sense the coordinates of the XY plane. The sensor 67 achieves the technical solution of image floating display and floating touch. As shown in FIG. 6, the air touch display includes a housing 60 in which a display 61 and an arithmetic unit 63 are placed. The display 61 forms an acute angle with the horizontal plate, and the double-sided angular lens matrix ( Hereinafter referred to as the light-transmitting element 65) is placed horizontally above the display 61, so that an image light generated by the display 61 can be reflected by the light-transmitting element 65 to form a floating image 611 at a position symmetrical to the display 61. The infrared sensor 67 emits a sensing light 671 toward the floating image 611. The sensing light 671 overlaps the floating image 611 and can detect the position of an object in the display area of the floating image 611, such as a finger. Click the icon displayed in the floating image 611, the infrared sensor 67 can detect the position of the finger, and the computing unit 63 further executes corresponding actions according to the position of the finger.

In addition to using an infrared sensor 67 capable of sensing the coordinates of the XY plane, the air touch display 61 may further be combined with an infrared photosensitive coupling element (CCD) capable of sensing the Z coordinate. The infrared photosensitive coupling element (CCD) and the sensing The infrared sensor 67 of the XY plane coordinates is similar. It judges the position of the finger by calculating the time difference between the emitted infrared (light) and the received reflected infrared (light), and the calculation unit 63 performs further execution according to the position of the finger. The corresponding action.

However, when the light-transmitting element 65, the infrared sensor 67, and the infrared light-sensitive coupling element are actually combined, more elements will occupy more internal space, and the air touch display 61 faces the problem of being too large. At the same time, the cost of the light-transmitting element 65, the infrared sensor 67, and the infrared light-sensitive coupling element is relatively high, and a large amount of money must be spent to integrate the three. Furthermore, if the light-transmitting element 65, the infrared sensor 67 and the infrared light-sensitive coupling element are not integrated in the housing 60, the infrared light-sensitive coupling element is placed outside the housing 60, and the infrared light-sensitive coupling element and the light-transmitting element There will be a dead angle between 65 and the infrared light-sensitive coupling element will not be able to sense all the movements of the user, causing inconvenience in use.

In order to solve the problem of high manufacturing cost, large volume, and dead corners of sensing in the existing aerial touch display, the present invention provides a three-dimensional coordinate touch device. With the touch module and the light-transmitting element, in addition to the floating display The empty image can also provide touch function within the display range of the floating image, increasing the convenience of use.

In order to achieve the above purpose, the three-dimensional coordinate touch device provided by the present invention includes: A display module for generating an image light; A touch module, which is arranged above the display module, and the touch module is used to sense the three-axis position of a touch object; A light-transmitting element is arranged above the touch module, the light-transmitting element is for transmitting the image light, and is used to convert the transmitted image light into a floating image, and the floating image is displayed on the light-transmitting element Above.

This model also provides a three-dimensional coordinate touch device, which includes: A display module for generating an image light; A light-transmitting element is arranged above the display module. The light-transmitting element is used for transmitting the image light and used to convert the transmitted image light into a floating image. The floating image is displayed on the light-transmitting element Above A touch module is arranged above the light-transmitting element, and the touch module is used for sensing the three-axis position of a touch object.

In the three-dimensional coordinate touch device, the touch module further includes a plurality of first sensing lines and a plurality of second sensing lines, the plurality of first sensing lines are arranged parallel to each other at intervals, and the plurality of second sensing lines are parallel to each other The plurality of first sensing lines and the plurality of second sensing lines respectively cross and are electrically insulated; the plurality of first sensing lines and the plurality of second sensing lines are used for sensing an X axis of the touch object Coordinates and a Y-axis coordinate.

In the three-dimensional coordinate touch device, the touch module is used to further calculate the distance between the touch object and the plurality of first sensing lines and the plurality of second sensing lines, and the distance represents the distance of the touch object A Z-axis coordinate.

In the three-dimensional coordinate touch device, the method for calculating the distance is: D=ε*A/C; Wherein D represents the distance between the touch object and the touch module, A represents the surface area of the touch module, C represents the capacitance value sensed by the touch module, and ε is the dielectric coefficient.

The present invention uses the touch module to sense the touch position. In addition to sensing the position of the touch object on the XY plane, the touch module itself can also sense the position of the touch object on the Z axis. Position, achieve the function of three-axis reporting point. At the same time, the present invention integrates the display module, the touch control module and the light-transmitting element, so that the volume of the present invention can be effectively reduced compared with the prior art, and it is more convenient to transport or place. In addition, since the touch module can adopt a capacitive touch panel, the touch sensing area is large and the dead angle of touch can be effectively reduced, and the coordinate reporting of the touch object can be more accurate.

In order to understand the technical features and practical effects of the present invention in detail, and to implement it in accordance with the new content, the preferred embodiments shown in the drawings are further described in detail as follows:

Please refer to FIG. 1, the present invention discloses a three-dimensional coordinate touch device, which includes a display module 10, a touch module 20 and a light-transmitting element 30.

The display module 10 is used to generate an image light, and the image light represents the screen displayed by the display module 10. Specifically, the display module 10 can be a liquid crystal display (LCD), a light emitting diode display (LED) or other display screens.

In the first preferred embodiment of the present invention, the touch module 20 is disposed above the display module 10 and can be attached to the display module 10 through an optical glue 11. The touch module 20 is used to sense the position of a touch object 40. Specifically, please refer to FIG. 2. The touch module 20 is a capacitive touch panel. The capacitive touch panel includes a plurality of first sensing lines 21 and a plurality of second sensing lines 22. The sensing wires 21 and the plurality of second sensing wires 22 are light-transmissive, the plurality of first sensing wires 21 are arranged in parallel and spaced apart from each other, the plurality of second sensing wires 22 are arranged in parallel and spaced apart from each other, and the plurality of first sensing wires 21 and the The plurality of second sensing wires 22 respectively cross and are electrically insulated. The plurality of first sensing wires 21 extend toward a first axis, and the plurality of second sensing wires 22 extend toward a second axis, wherein the first axis may be X Axis, the second axis can be the Y axis; or vice versa, the first axis can be the Y axis, and the second axis can be the X axis. The touch module 20 determines the touch position of the touch object 40 on the XY plane by acquiring which first sensing lines 21 and second sensing lines 22 the touch object 40 (finger, stylus) triggers, and further outputs Touch action.

Wherein, the plurality of first sensing lines 21 respectively include a plurality of first sensing electrodes 211, and the plurality of second sensing lines 22 include a plurality of second sensing electrodes 221. The plurality of first sensing electrodes 211 are spaced apart from each other and electrically connected to each other, and are sequentially arranged along the first axis. The plurality of second sensing electrodes 221 are spaced apart from each other and electrically connected to each other, and are sequentially arranged along the second axis. The plurality of first sensing electrodes 211 and the plurality of second sensing electrodes 221 may be respectively formed of conductive indium tin oxide (ITO).

In this case, the relative positions of the touch object 40 and the touch module 20 can be determined by the plurality of first sensing lines 21 and the plurality of second sensing lines 22. For example, please refer to Figure 3, each of the sensing lines 21 and 22 respectively represents a coordinate. For example, as shown in Figure 3, each first sensing line 21 represents Y0, Y1, Y2... and other coordinates, and each second sensing line 22 represents coordinates such as X0, X1, X2, X3, etc., and the touch object 40 generates a touch position 23 on the touch module 20, and the touch position 23 represents a complex number generated on the touch module 20 The position of the self-capacitance signal. A processing unit of the touch module 20 will determine the coordinates of the touch position 23 according to the capacitance changes induced by the touch position 23 on the sensing lines 21 and 22. For example, in FIG. 3, the touch position 23 is The raw data of the capacitance change generated on the second sensing line 22 corresponding to the coordinate X0 is 920, and the raw data of the capacitance change generated on the second sensing line 22 corresponding to the coordinate X1 is 2511. The original data of the capacitance change generated on the second sensing line 22 is 1800, and the original data of the capacitance change generated on the second sensing line 22 corresponding to the coordinate X3 is 312. Then, the weighted average of the foregoing raw data can be used to obtain the touch control. X coordinate of position 23:

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；

In the same way, the Y coordinate of the touch position 23 can also be obtained by weighted average:

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；

Through the above method, the coordinates of the touch position 23 can be obtained as (1.27, 0.66).

Please further refer to FIG. 4, the light-transmitting element 30 is disposed above the touch module 20 and can be attached to the touch module 20 through another optical glue 31. The light-transmitting element 30 transmits the image light and is used to convert the transmitted image light into a floating image, which is displayed above the light-transmitting element 30 and is also located opposite to the touch module 20 Above, the display range of the floating image overlaps the range where the touch module 20 senses the touch object 40, and the floating image is not projected beyond the range sensed by the touch module 20. The light-transmitting element 30 may be a light field microlens (Light Field Microlens) using light field capture technology (Light Field Capture).

In addition to determining the X-axis and Y-axis coordinates of the touch object, the touch module 20 can also determine the Z-axis coordinates of the touch object 40. The new model adopts the capacitance formula C=ε*A/D to perform the inverse calculation to obtain the distance D=ε*A/C, which means that the distance between the touch object 40 and the touch module 20 along the Z axis and the capacitance The reciprocal (1/C) of the value is proportional. In this case, the distance D between the touch object 40 and the plurality of first sensing lines 21 and the plurality of second sensing lines 22 is used as the Z axis of the touch object 40 to perform the Three-axis three-dimensional position recognition of touch objects. Among them, D represents the distance along the Z axis between the touch object and the touch module, A represents the surface area of the touch module, C represents the capacitance value sensed by the touch module, and ε is the medium Electric coefficient.

The creator can obtain the data in Table 1 below through actual experiments. When the touch object 40 is located 5mm above the touch module 20, the average raw data (Avg_Raw_Data) measured by the touch module 20 is 702.55. The reciprocal is 0.001223386; when the touch object 40 is 10mm above the touch module 20, the average raw data measured by the touch module 20 is 277.78, and the reciprocal is 0.003599971; when the touch object 40 is located When the upper side of the touch module 20 is 5 mm, the average raw data measured by the touch module 20 is 182.4, and the reciprocal is 0.00548256. Since the distance is proportional to the reciprocal (1/C) of the capacitance value, the distance is linearly related to the reciprocal (1/C) of the capacitance value. The mathematical relationship between the distance and the reciprocal (1/C) of the capacitance value can be expressed as a line The sex equation is expressed. According to the data in Table 1 below, the linear equation can be obtained as:

D=0.0004*1/C-0.0006. Distance D (mm) Avg_Raw_Data 1/ Avg_Raw_Data 5 702.55 0.001223386 10 277.78 0.003599971 15 182.4 0.00548256 Table 1

According to the linear equation, the touch module 20 can deduce the distance between the touch object 40 and the touch module 20 according to the measured average raw data, that is, the touch object 40 is relative to the The Z-axis coordinates between the touch modules 20 are combined with the X-axis and Y-axis coordinates of the touch object 40 determined by the touch module 20 to determine that the touch object 40 is in the touch module 20. The upper three-axis coordinates (X, Y, Z) are used to determine the relative position of the touch object 40 with respect to the touch module 20.

Referring to FIG. 5, in the second preferred embodiment of the present invention, the difference from the first preferred embodiment is that the positions of the touch module 20 and the light-transmitting element 30 are opposite, and the light-transmitting element 30 passes through the The optical glue 11 is bonded to the display module 10, and the touch module 20 is bonded to the light-transmitting element 30 through another optical glue 31, and can also perform the function of three-axis touch recognition in this case.

The above are only the preferred embodiments of the present invention and do not limit the present invention in any form. Although the present invention has been disclosed in the preferred embodiments, it is not intended to limit the present invention. Anyone familiar with the professional technology Personnel, without departing from the scope of the technical solution of the present invention, when the technical content disclosed above can be used to make slight changes or modification into equivalent embodiments with equivalent changes, but any content that does not deviate from the technical solution of the present invention is based on the present invention. Any simple modifications, equivalent changes and modifications made to the above embodiments are still within the scope of the new technical solution.

10: Display module 11: Optical glue 20: Touch module 21: The first induction line 211: The first sensing electrode 221: second sensing electrode 22: The second induction line 23: Touch position 30: light-transmitting element 31: Optical glue 40: Touch objects 60: shell 61: display 611: Floating Image 63: arithmetic unit 65: light-transmitting element 67: infrared sensor 671: Sense Light

Figure 1: A schematic cross-sectional side view of the first preferred embodiment of the present invention. Figure 2: A schematic diagram of the planar appearance of the new touch module. Figure 3: Schematic diagram of the new coordinate reporting point. Figure 4: A schematic diagram of the three-dimensional appearance of the first preferred embodiment of the present invention. Figure 5: A schematic side sectional view of the second preferred embodiment of the present invention. Figure 6: A schematic side view of a conventional aerial touch display.

10: Display module

11: Optical glue

20: Touch module

30: light-transmitting element

31: Optical glue

40: Touch objects

Claims (10)

A three-dimensional coordinate touch device includes: a display module for generating an image light; a touch module arranged above the display module, the touch module for sensing a touch The three-axis position of the object; a light-transmitting element arranged above the touch module, the light-transmitting element for the transmission of the image light, and for converting the transmitted image light into a floating image, the floating image Shown above the light-transmitting element. The three-dimensional coordinate touch device according to claim 1, wherein the touch module is used to further calculate the distance between the touch object and the touch module, and the distance represents a Z-axis coordinate of the touch object . The three-dimensional coordinate touch device according to claim 2, wherein the calculation method of the distance is: D=ε*A/C; where D represents the distance between the touch object and the touch module, and A represents The surface area of the touch module, C represents the capacitance value sensed by the touch module, and ε is the dielectric coefficient. The three-dimensional coordinate touch device according to any one of claims 1 to 3, wherein the touch module further includes a plurality of first sensing lines and a plurality of second sensing lines, and the plurality of first sensing lines are parallel and spaced apart from each other The plurality of second induction lines are arranged in parallel and spaced apart from each other, the plurality of first induction lines and the plurality of second induction lines respectively cross and are electrically insulated; the plurality of first induction lines and the plurality of second induction lines are used for An X-axis coordinate and a Y-axis coordinate of the touch object are sensed. The three-dimensional coordinate touch device according to claim 4, wherein the plurality of first sensing lines each include a plurality of first sensing electrodes, the plurality of second sensing lines include a plurality of second sensing electrodes, and The plurality of first sensing electrodes are spaced apart from each other and electrically connected to each other, and the plurality of second sensing electrodes are spaced apart from each other and electrically connected to each other. A three-dimensional coordinate touch device includes: a display module for generating an image light; a light-transmitting element arranged above the display module, the light-transmitting element for transmitting the image light, and for transmitting The transmitted image light is converted into a floating image, and the floating image is displayed above the light-transmitting element; a touch module is arranged above the light-transmitting element, and the touch module is used for sensing a The three-axis position of the touch object. The three-dimensional coordinate touch device according to claim 6, wherein the touch module is used to further calculate the distance between the touch object and the touch module, and the distance represents a Z-axis coordinate of the touch object . The three-dimensional coordinate touch device according to claim 7, wherein the calculation method of the distance is: D=ε*A/C; wherein, D represents the distance between the touch object and the touch module, and A Represents the surface area of the touch module, C represents the capacitance value sensed by the touch module, and ε is the dielectric coefficient. The three-dimensional coordinate touch device according to any one of claim 6 to 8, wherein the touch module further includes a plurality of first sensing lines and a plurality of second sensing lines, and the plurality of first sensing lines are parallel and spaced apart from each other The plurality of second induction lines are arranged in parallel and spaced apart from each other, the plurality of first induction lines and the plurality of second induction lines respectively cross and are electrically insulated; the plurality of first induction lines and the plurality of second induction lines are used for An X-axis coordinate and a Y-axis coordinate of the touch object are sensed. The three-dimensional coordinate touch device according to claim 9, wherein the plurality of first sensing lines respectively include a plurality of first sensing electrodes, and the plurality of second sensing lines include a plurality of second sensing electrodes, the The plurality of first sensing electrodes are spaced apart from each other and electrically connected to each other, and the plurality of second sensing electrodes are spaced apart from each other and electrically connected to each other.

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