TW201626194A - Touch sensing device - Google Patents

Abstract

The present invention discloses a touch sensing device including a light source module, a light sensing device and a controller. The light source module includes multiple luminescent units spaced at regular intervals. The light sensing device is installed at a lateral side of the light source module to capture current images including a light emitting surface of the light source module. In the present invention, when an object approaches the light source module, at least one luminescent unit is blocked by the object, so the current image captured by the light sensing device may have a shadow zone. The controller further maps a coordinate system to the current image, so as to obtain a coordinate of the object according to the shadow zone, and then transmit the coordinate of the object to an electronic device.

Description

Touch device

The invention relates to a touch device, in particular to an optical touch device.

In general, touch devices can be classified into resistive, capacitive, and optical. Compared with resistive and capacitive touch devices, optical touch devices have the advantages of low cost and economical advantages.

Please refer to FIG. 1 , which is a structural diagram of a conventional optical touch device when it is not touched. The conventional optical touch device 10 includes a contact plate 101, a plurality of first light emitting units 102, a plurality of second light emitting units 103, a plurality of first light sensing devices 104, a plurality of second light sensing devices 105, and a first circuit. The board 106, a second circuit board 107, a third circuit board 108, and a fourth circuit board 109, a first controller 110, and a second controller 111.

The contact plate 101 is used to be contacted by a user's finger or a stylus. The plurality of first light-emitting units 102 are configured to generate a plurality of first light beams B1, and the plurality of first light beams B1 are traveling in a direction parallel to the contact plate 101. The contact plate 101 passes over, and the plurality of second light emitting units 103 are used to generate a plurality of second light beams B2, and the plurality of second light beams B2 travel in a direction perpendicular to the plurality of first light beams B1 to pass over the contact plate 101.

As shown in FIG. 1 , a first circuit board 106 is disposed on a left side of the contact board 101 for arranging a plurality of first light emitting units 102 thereon, and a third circuit board 108 is disposed on a right side of the contact board 101 for setting a plurality of a first light sensing device 104 and a second controller 111 thereon, Each of the first light emitting units 102 corresponds to a first light sensing device 104 , and the second controller 111 is respectively connected to the plurality of first light sensing devices 104 . The second circuit board 107 is disposed on the upper side of the contact board 101 for arranging the plurality of second light emitting units 103 thereon, and the fourth circuit board 109 is disposed on the lower side of the contact board 101 for setting a plurality of second light senses. The measuring device 105 and the first controller 110 are disposed thereon, wherein each of the second lighting units 103 corresponds to a second light sensing device 105, and the first controller 110 is respectively connected to the plurality of second light sensing devices 105.

The plurality of first light sensing devices 104 are configured to receive the plurality of first light beams B1 from the plurality of first light emitting units 102, and convert the received first light beam B1 from light energy into electrical signals, and output corresponding electrical signals to The second controller 111. Similarly, the plurality of second light sensing devices 105 are configured to receive the plurality of second light beams B2 from the plurality of second light emitting units 103, and convert the received second light beam B2 from light energy into electrical signals, and output corresponding signals. The electrical signal is supplied to the first controller 110.

When the conventional optical touch device 10 is operated and the contact plate 101 is not touched, the plurality of first light-emitting units 102 generate a plurality of first light beams B1 and the plurality of first light beams B1 are corresponding to the upper portion of the contact plate 101. The first light sensing device 104 receives the plurality of first light sensing devices 104 to output an electrical signal corresponding to the first light beam B1 to the second controller 111. On the other hand, the plurality of second light emitting units 103 generate a plurality of second light beams B2 and the plurality of second light beams B2 are received by the corresponding plurality of second light sensing devices 105 through the upper side of the contact plate 101, so that the plurality of second light sensing devices The device 105 outputs an electrical signal corresponding to the second light beam B2 to the first controller 110.

Please refer to FIG. 2 , which is a schematic structural diagram of a conventional optical touch device when it is touched. When the conventional optical touch device 10 is operated and a certain point of the contact plate 101 is touched by the finger F of the user, the first light beam B1 generated by the corresponding first light-emitting unit 102 of the plurality of first light-emitting units 102 is The user's finger is blocked so that the first beam B1 cannot be correspondingly The first light sensing device 104 receives, and the first light beam B1 is received by the first light sensing device 104 corresponding thereto, except for the first light beam B1 generated by the corresponding first light emitting unit 102. The first light sensing device 104 transmits the corresponding electrical signal to the second controller 111. Therefore, the second controller 111 can know which horizontal position is available according to the first light sensing device 104 that does not output the electrical signal. The presence of an object blocks the travel of the first beam B1.

Similarly, the second light beam B2 generated by the corresponding second light emitting unit 103 of the plurality of second light emitting units 103 is blocked by the user's finger, so that the second light beam B2 cannot be corresponding to the corresponding second light sensing device 105. Receiving, except for the second light beam B2 generated by the corresponding second light emitting unit 103, the remaining second light beams B2 are received by the corresponding second light sensing device 105, and the second light sensing device 105 Transmitting the corresponding electrical signal to the first controller 110, so that the first controller 110 can know which vertical position has an object and block the second light beam B2 according to the second light sensing device 105 that does not output the electrical signal. Go on. Through the above operation, the first controller 110 and the second controller 111 can obtain the location of the user's finger and output a trigger signal corresponding to the location of the user. The operation of the conventional optical touch device 10 is as described above.

However, the conventional optical touch device 10 must be provided with a large number of first light sensing devices 104 and second light sensing devices 105 to detect the position of the user's finger, so that the conventional optical touch device 10 is inevitable. The land requires a higher cost. Therefore, there is a need for an optical touch device that can reduce costs.

It is an object of the present invention to provide an optical touch device that can reduce cost.

An object of the present invention is to provide a touch device including: A light source module includes a plurality of light emitting units, wherein the light source module includes a light emitting surface, and the plurality of light emitting units emit a light beam to the light emitting surface to form a light source; and a light sensing device is disposed on one side of the light source module, Obtaining an instant image including an image above the light-emitting surface; and a controller connected to the light sensing device, wherein the controller includes a calibration system, the coordinate system is generated according to an effective touch range information, and the effective touch The range information is generated according to the plurality of real-time images obtained when the object is located at a plurality of preset positions on the light-emitting surface; wherein, when an object approaches the light-emitting surface, at least one of the light-emitting units is blocked by the object to obtain an instant of the light sensing device The image creates a shaded area, and the controller maps the coordinate system to the instant image with the shadow area to obtain the coordinates of one of the objects, and transmits the coordinates of the object to an electronic device.

10‧‧‧Optical touch device

101‧‧‧Contact plate

102‧‧‧First lighting unit

103‧‧‧second lighting unit

104‧‧‧First light sensing device

105‧‧‧Second light sensing device

106‧‧‧First board

107‧‧‧Second circuit board

108‧‧‧ Third board

109‧‧‧fourth circuit board

110‧‧‧First controller

111‧‧‧Second controller

B1‧‧‧First beam

B2‧‧‧second beam

F‧‧‧ finger

20‧‧‧ touch device

201‧‧‧Light source module

201a‧‧‧Lighting unit

2010‧‧‧Light surface

2011‧‧‧ side

202‧‧‧Light sensing device

203‧‧‧ Controller

204‧‧‧Circuit board

205‧‧‧Electronic device

S1 to S9‧‧ steps

A‧‧‧First corner

B‧‧‧second corner

C‧‧‧ third corner

D‧‧‧ fourth corner

E‧‧‧ touch location

A1, B1, C1, D1, E1, C2‧‧‧ Instant video

A11, B11, C11, D11, E11, C21‧‧‧ shadow area

30‧‧‧ touch device

301‧‧‧Light source module

301a‧‧‧Lighting unit

3010‧‧‧Lighting surface

3011‧‧‧ side

302‧‧‧Light sensing device

303‧‧‧ Controller

304‧‧‧Circuit board

40‧‧‧ touch device

401‧‧‧Light source module

402‧‧‧Light sensing device

403‧‧‧ Controller

404‧‧‧ boards

405‧‧‧ Distance sensing device

4011‧‧‧ side

M‧‧‧ coordinate system

N, O, P, Q and R‧‧‧ endpoints

FIG. 1 is a schematic structural view of a conventional optical touch device when it is not touched.

FIG. 2 is a schematic structural view of a conventional optical touch device when it is touched.

3 is a schematic top view of the touch device of the present invention in a first preferred embodiment.

4 is a block diagram of a touch device of the present invention in a first preferred embodiment.

FIG. 5 is a schematic diagram of a setting process of the touch device of the present invention.

FIG. 6 to FIG. 9 are schematic diagrams showing the plurality of instant images generated when the finger is located at a plurality of preset positions of the light source module in the first preferred embodiment of the present invention.

FIG. 10 is a schematic diagram showing the relationship between the instant image generated by the touch device and the coordinate system when the finger is located at the touch position of the light source module in the first preferred embodiment of the present invention.

FIG. 11 is a schematic top view of the touch device of the present invention in a second preferred embodiment.

FIG. 12 is a schematic diagram of a real-time image generated when a finger is located at a third corner of a light source module according to a second preferred embodiment of the present invention.

FIG. 13 is a schematic top view of the touch device of the present invention in a third preferred embodiment.

The present invention provides a touch device. First, the structure of the touch device of the present invention will be described. 3 and FIG. 4, FIG. 3 is a top view of the touch device of the present invention in a first preferred embodiment, and FIG. 4 is a block diagram of the touch device of the present invention in a first preferred embodiment. . The touch device 20 includes a light source module 201 , a light sensing device 202 , a controller 203 , and a circuit board 204 . The light source module 201 includes a plurality of light emitting units 201a and a light emitting surface 2010, and each light emitting unit 201a is configured to emit a light beam upward to the light emitting surface 2010 to form a surface light source covering the light emitting surface 2010. During assembly, the circuit board 204 is connected to one side of the light source module 201 by means of a cable or the like. The light sensing device 202 and the controller 203 are disposed on the circuit board 204 to provide the circuit board 204 with power to the light sensing device. 202 and the controller 203, and the light sensing device 202 is connected to the controller 203. In addition, the light sensing device 202 is disposed toward the light source module 201 to obtain an instant image including an image above the light exit surface 2010 of the light source module 201.

In the preferred embodiment, the side of the light source module 201 is the right side of the light source module 201, the circuit board 204 is connected to the side of the light source module 201, and the light sensing device 202 is disposed at one end of the circuit board 204. The circuit board 204 can also be connected to any side of the light source module 201, and the light sensing device 202 can also be disposed at the other end of the circuit board 204. Furthermore, the light source module 201 is a flexible organic light emitting diode (Flexible Organic) Light-Emitting Diodes (FOLED) module, the light-emitting unit 201a is an Organic Light-Emitting Diodes (OLED), and the light sensing device 202 is a Charge-Coupled Device (CCD) or a complementary Complementary Metal-Oxide Semiconductor (CMOS), and controller 203 is a microprocessor.

Next, the operation principle of the touch device of the present invention will be described. Please refer to FIG. 4 to FIG. 9 first. 5 is a schematic diagram of a setting process of the touch device of the present invention, and FIG. 6 to FIG. 9 are multiple instants generated when the finger is located at a plurality of preset positions of the light source module in the first preferred embodiment of the present invention. Schematic of the image. As shown in step S1, when the touch device 20 is used for the first time, the user first needs to bring the touch device 20 into an operation region correction mode, which will be further described below.

First, depending on the shooting range of the light sensing device 202, the real image includes the image around the light emitting surface 2010 in addition to the image above the light emitting surface 2010, but the range of the light emitting surface 2010 is the effective touch range of this example. Therefore, the purpose of the operation area correction mode is to obtain the range of the image corresponding to the light-emitting surface 2010 in the instant image.

The controller 203 of the touch device 20 is connected to an electronic device 205 in a wired manner, such as a transmission line, or in a wireless manner, such as a Bluetooth device, and the electronic device 205 is installed with a corresponding driver or application, so that the user can operate The electronic device 205 causes the touch device 20 to enter the operating area correction mode.

Then, as shown in steps S2 to S4, when the touch device 20 enters the operation region correction mode, the electronic device 205 will prompt the user to face the finger toward the front, that is, the direction H as shown in FIG. Preset position, in this case, multiple presets The position is at the four corners of the light-emitting surface 2010, that is, the first corner A, the second corner B, the third corner C, and the fourth corner D. As shown in FIG. 6 to FIG. 9 , when the user places the finger in the first corner A, the second corner B, the third corner C, and the fourth corner D, the light sensing device 202 respectively captures as shown in FIG. 6 to FIG. The instant images A1, B1, C1 and D1 shown in FIG. And since at least one of the light emitting units 201a is blocked by the finger, the instant images A1, B1, C1, and D1 will include the shaded areas A11, B11, C11, and D11, respectively. The live images A1, B1, C1, and D1 are then transmitted to the controller 203.

Since the image sizes of the instant images A1, B1, C1, and D1 and the shooting angle and range of the light sensing device 202 are the same, the instant images A1, B1, C1, and D1 having the same image size, shooting angle, and range are combined. In the case of a single image, the controller 203 will obtain the range formed by the endpoints N, O, P, and Q at which the shadow regions A11, B11, C11, and D11 are located in the instant image. The shadow areas A11, B11, C11, and D11 respectively correspond to the images when the finger is located at the first corner A, the second corner B, the third corner C, and the fourth corner D of the light exit surface 2010, and the first corner A, The range formed by the second corner B, the third corner C, and the fourth corner D is equivalent to the range of the light-emitting surface 2010, so the range formed by the endpoints N, O, P, and Q is also equivalent to the image corresponding to the light-emitting surface 2010. The range of the effective touch range of this example. Thereby, the controller 203 can obtain an effective touch range in the instant image. Then the controller 203 establishes a calibration system within the effective touch range of the instant image, and the four endpoint coordinates of the coordinate system are the endpoints N(0, 0), O(Xmax, 0), P(0, respectively. Ymax) and Q (Xmax, Ymax). Xmax and Ymax are the maximum value of the X-axis coordinate and the maximum value of the Y-axis coordinate of the coordinate system, respectively, and the value and coordinate degree of the coordinate system are determined by the controller 203, and the controller 203 The developer can adjust the establishment of the coordinate axis according to actual needs, such as the maximum value of the X-axis coordinate, the maximum value of the Y-axis coordinate, and the fineness of the coordinate system.

In addition, in this example, the electronic device 205 prompts the user to place the finger toward the front, that is, the direction H shown in FIG. 3, and is placed on the light source module 201. Therefore, the controller 203 is located at the front end N, The range of the O, P, and Q forms an effective touch range in the instant image, but not limited thereto. If the electronic device 205 prompts the user to place the finger on the light source module 201 in other directions, the controller 203 The effective touch range in the live image will be obtained by the range formed by the different end points.

The following is a description of a user who uses the touch device 20 to control the electronic device 205 connected thereto. Referring to FIG. 10 , the touch device of the present invention is in the touch control of the light source module in the first preferred embodiment. A schematic representation of the instantaneous image produced at the location and its relationship to the coordinate system. When the user places a finger at any position of the light source module 201, for example, the touch position E shown in FIG. 10, at least one of the light emitting units 201a is blocked by the finger, and the light sensing device 202 captures and obtains the corresponding shadow area E11. Instant image E1. When the real-time image E1 is transmitted to the controller 203, since the effective touch range information in the instant image is already stored in the controller 203, that is, the position of the four endpoints of the coordinate system in the live image is valid. The coordinate system is established in the touch range. Therefore, by mapping the coordinate system M to the effective touch range in the instant image E1, the controller 203 can obtain the coordinates of the end point R located in front of the shadow area E11, that is, corresponding The coordinates of the object at the user's finger position are transmitted to the electronic device 205 corresponding to the coordinates of the user's finger position.

The coordinates received by the electronic device 205 can be used to execute different instructions. For example, controlling the movement of the cursor of the electronic device 205, or according to the finger of the fixed time The change in coordinates, the electronic device 205 will perform, such as clicking, drag and drop, and the like. In the case of a point-and-click operation, when the object is located within the first fixed time, for example, 0.5 seconds, and stays at the same place without change, the electronic device performs a selection operation, such as opening an application corresponding to the coordinates of the object. Programs, etc. In the drag and drop operation, when the object is located in the first fixed time, for example, 0.5 seconds, after staying at the same place without changing for a period of time, for example, 0.25 seconds, when the continuous change occurs, the electronic device will execute a Drag and drop, such as moving the icon corresponding to the coordinates of the object at that location.

Furthermore, the present invention further provides a second preferred embodiment. Referring to FIG. 11 to FIG. 12, FIG. 11 is a top view of the touch device of the present invention in a second preferred embodiment, and FIG. 12 is a second preferred embodiment of the touch device of the present invention. A schematic diagram of an instant image produced when a finger is located at a third corner of the light source module. In this embodiment, the touch device 30 includes a light source module 301, a two-light sensing device 302, a controller 303, and a circuit board 304. The light source module 301 includes a plurality of light emitting units 301a and a light emitting surface 3010 arranged at intervals. The circuit board 304 is connected to one side 3011 of the light source module 301 through a cable or the like. The controller 303 is disposed on the circuit board 304 to provide power to the controller 303, and the two light sensing devices 302 are respectively disposed. At both ends of the side 3011 of the light source module 301. In the preferred embodiment, the side 3011 of the light source module 301 is disposed on the right side thereof, and the two light sensing devices 302 are disposed on the two sides of the side 3011, but not limited thereto, the light sensing device 302 can also be used. It is disposed on either side of the light source module 301.

Referring to FIG. 12, unlike the first preferred embodiment, since the two light sensing devices 302 are disposed in this example, each of the light sensing devices 302 can be captured from different angles of view. The instant image of the user's hand, and the instant image taken from different angles of view will include shadow regions having different shapes, and the shadow regions of different shapes correspond to the hand features of the user seen from different viewing angles. Therefore, the instant image captured by the two-light sensing device 302 can completely display the contour of the user's hand. As shown in FIG. 12, it is an instant image C2 generated when the user places his finger in the third corner C. Since the shadow area C21 of the instant image C2 can completely display the contour of the user's hand, in the area correction mode, the controller 303 can further determine whether the user points the finger toward the direction H according to the system image according to the instant image C2 to improve the correction. Precision. The remaining structure and operation principle of the touch device 30 of the second preferred embodiment are the same as those of the first preferred embodiment, and details are not described herein again.

Furthermore, the present invention further provides a third preferred embodiment. Please refer to FIG. 13, which is a top view of the touch device of the present invention in a third preferred embodiment. In this embodiment, the touch device 40 includes a light source module 401, a light sensing device 402, a controller 403, a circuit board 404, and a distance sensing device 405. The circuit board 404 is connected to one side 4011 of the light source module 401 through a cable or the like. The controller 403 is disposed on the circuit board 404 to provide power to the controller 403, and the two light sensing devices 402 are respectively disposed. At both ends of the side 4011 of the light source module 401. In the preferred embodiment, the side 4011 of the light source module 401 is disposed on the right side thereof, the two light sensing devices 402 are disposed at the two ends of the side 4011, and the distance sensing device 405 is disposed on the second light sensing device 402. The light sensing device 402 can also be disposed on either side of the light source module 401, and the distance sensing device 405 can also be disposed at the center of the light source module 401. In addition, in this example, the distance sensing device 405 is an infrared sensing device, but is not limited thereto.

Different from the first and second preferred embodiments, in this example, by adding distance The sensing device 405 senses that the user's finger approaches or moves away from the light source module 401, thereby obtaining a change in the Z-axis position of the user's finger. Depending on the signal generated by the distance sensing device 405, which is the Z-axis coordinate data in this example, the controller 403 can perform other specific operations, such as when the finger is away from the light source module 401. 40 enters the power saving mode and so on. The electronic device 205 can also perform other specific operations according to the change of the Z-axis coordinate data, for example, when the finger is away from the light source module 401, the object displayed by the electronic device 205 is enlarged, or when the finger approaches the light source module 401, the display of the electronic device 205 is reduced. An object or the like to enrich the function of the touch device 40. The remaining structure and operation principle of the touch device 40 of the third preferred embodiment are the same as those of the first and second preferred embodiments, and details are not described herein again.

In addition, referring to FIG. 5 again, the touch device 20 of the present invention further provides a light source intensity correction mode. When the user thinks that the touch device 20 is not accurate enough to require correction, the foregoing operation region correction mode may be performed again. The light source intensity correction mode as shown in steps S5 to S9 can also be performed, which will be further described below.

As shown in steps S2 to S6, when the touch device 20 enters the light source intensity correction mode, the electronic device 205 will prompt the user not to place any object, such as a finger, on the light exit surface 2010. It can be understood that, since the plurality of light-emitting units 201a emit a plurality of light beams upward to the light-emitting surface 2010 to form a surface light source that covers the light-emitting surface 2010, when the light-emitting intensity of the plurality of light-emitting units 201a is greater than the light-emitting intensity of the background light source, and the plurality of light-emitting units 201a are When not blocked, the instant image obtained by the light sensing device 202 including the light emitting surface 2010 of the light source module 201 should have no shadow area, that is, should not have any image of the background object. Thereby, the controller 203 can determine the light sensing device 202 by The real-time image obtained in the light source intensity correction mode determines whether it is necessary to adjust the luminous intensity of the complex light-emitting unit 201a. In detail, when the live image has a shaded area, the luminous intensity of the plurality of light-emitting units 201a is lower than the light-emitting intensity of the background light source. Therefore, as shown in step S8, the controller 203 increases the light-emitting intensity of the plurality of light-emitting units 201a to complete. The light source intensity correction of the light source module 201. When the instant image does not have a shadow area, the luminous intensity of the complex light-emitting unit 201a is higher than the light-emitting intensity of the background light source. Therefore, as shown in step S9, the controller 203 directly performs the light source intensity correction of the light source module 201 without adjusting. The luminous intensity of the plurality of light emitting units 201a.

In addition, in the present invention, the light sensing device 202 can be disposed on the circuit board 204, and can also be used as the light sensing device 302 of the second preferred embodiment and the light sensing device 402 of the third preferred embodiment. The light source module 301 and the light source module 401 are integrated in the same wafer. Similarly, the light sensing device 302 of the second preferred embodiment and the light sensing device 402 of the third preferred embodiment may be disposed on the circuit board 304 and the circuit board 404, respectively, instead of the light source module 301 and The light source module 401 is integrated in the same wafer. In addition, the number of the light sensing devices 202, 302, and 402 is not limited, and the above preferred embodiments are for illustrative purposes only.

According to the above, the touch device of the present invention uses the light sensing device to obtain a plurality of real-time images when the user places a finger on a plurality of preset positions on the light source module, and obtains an effective touch in the instant image by using multiple real-time images. Control the range and establish a standard system within the effective touch range. Then, by mapping the coordinate system to the instant image generated when the user places the finger at any position of the light source module, the coordinate corresponding to the object where the user's finger is located can be obtained. Compared with the prior art, the conventional touch device must be set The plurality of light sensing devices corresponding to the plurality of light emitting elements, and the touch device of the present invention only needs to provide at least one light sensing device. Obviously, the touch device of the present invention can save considerable cost, and can also save the original necessity. The space of the plurality of light sensing devices is set. That is to say, the touch device of the present invention not only has the cost advantage, but also reduces the volume thereof and implements the volume thinning.

The above are only the preferred embodiments of the present invention, and are not intended to limit the scope of the present invention. Therefore, any equivalent changes or modifications made without departing from the spirit of the present invention should be included in the present invention. Within the scope of the patent application.

20‧‧‧ touch device

201‧‧‧Light source module

201a‧‧‧Lighting unit

2010‧‧‧Light surface

2011‧‧‧ side

End of 2012‧‧‧

202‧‧‧Light sensing device

203‧‧‧ Controller

204‧‧‧Circuit board

Claims (18)

A touch device includes: a light source module, comprising a plurality of light emitting units, wherein the light source module includes a light emitting surface, and the plurality of light emitting units emit a light beam to the light emitting surface to form a light source; a light sensing device is disposed a side of the light source module for obtaining an instant image including an image above the light emitting surface; and a controller coupled to the light sensing device, wherein the controller includes a calibration system, the coordinate system The information is generated according to an effective touch range information, and the effective touch range information is generated according to the plurality of real-time images obtained when the object is located at a plurality of preset positions of the light-emitting surface; wherein, an object approaches the light-emitting surface At least one of the light-emitting units is blocked by the object to cause a shadow region of the instant image obtained by the light sensing device, and the controller maps the coordinate system to the live image having the shadow region to obtain the The coordinate of one of the objects and the coordinates of the object are transmitted to an electronic device. The touch device of claim 1, wherein the effective touch range information refers to four end points of the coordinate system. The touch device of claim 2, wherein the touch device further includes an operation area correction mode, wherein the effective touch range information is obtained in the operation area correction mode, and the operation area correction mode includes The following steps are performed: the photo sensing device obtains the plurality of real-time images when the object is located at the plurality of preset positions of the light-emitting surface, and the controller obtains the effective touch range information according to the plurality of real-time images. The touch device of claim 3, wherein the operation area is corrected The mode includes four preset positions, each of the preset positions being a corner of the light-emitting surface, and each of the instant images includes a shadow area, and the controller sets the four endpoints of the four-shadow area to respectively The four endpoints of the coordinate system. The touch device of claim 1, wherein the light sensing device is disposed at one end of the side. The touch device of claim 1, wherein the touch device comprises two light sensing devices respectively disposed at two ends of the side. The touch device of claim 1, wherein the object coordinates include an X-axis coordinate data and a Y-axis coordinate data. The touch device of claim 7, wherein the coordinate of the object is a coordinate of an endpoint of the shaded area. The touch device of claim 1, further comprising a distance sensing device disposed at the side or a center of the light source module. The touch device of claim 9, wherein the coordinates of the object include an X-axis coordinate data, a Y-axis coordinate data, and a Z-axis coordinate data, wherein the light sensing device is configured to obtain the X-axis coordinate The data and the Y-axis coordinate data, and the distance sensing device is configured to obtain the Z-axis coordinate data. The touch device of claim 1, wherein the electronic device performs a corresponding one of the operations according to a change in a coordinate of the object within a fixed time. The touch device of claim 11, wherein the electronic device performs a one-click operation when the coordinates of the object are not changed within the first fixed time. The touch device of claim 11, wherein when the object is located in the first fixed time, the continuous change occurs after no change occurs, the electricity The child device performs a drag and drop operation. The touch device of claim 1, wherein the controller is connected to the electronic device in a wired or wireless manner. The touch device of claim 9, wherein the touch device further comprises a circuit board, the light sensing device, the distance sensing device and the controller are disposed on the circuit board, and the circuit The board is connected to the light source module. The touch device of claim 9, wherein the touch device further comprises a circuit board, the controller is disposed on the circuit board, the light sensing device and the distance sensing device and the light source module The group is integrated in the same wafer, and the circuit board is connected to the light source module. The touch device of claim 1, wherein the light source module is a Flexible Organic Light-Emitting Diodes (FOLED) module. The touch device of claim 1, wherein the touch device further includes a light source intensity correction mode, wherein the light sensing device does not have any object above the light exit surface when the light source intensity correction mode is obtained. And one of the instant images, and the controller determines whether the instant image has the shadow area, so that the light source intensity of the light source module is improved when the instant image has the shadow area.