Touch display device

Abstract

The invention discloses a touch display device. The touch display device comprises a touch position detection module, a control module and a display module, wherein the touch position detection module comprises a touch position determination unit, a driving mechanism and at least two laser transceiver groups; the driving mechanism drives the laser transceiver group to rotate around a rotating shaft of the driving mechanism; the at least two laser transceiver groups are sequentially arranged along the circumferential direction of the rotating shaft of the driving mechanism; the distance between at least part of the laser transceivers and the light-emitting surface of the display panel is different from the distance between other laser transceivers and the light-emitting surface of the display panel; the laser emitter emits laser; the laser receiver receives the laser reflected by the touch object; and the touch position determination unit determines the position of the touch object according to the laser emitted by the at least two laser transceiver groups and the reflected laser of the touch object. The touch position detection module in the touch display device has high detection precision on the touch position of the touch object, is easy to install, has no limitation on the screen size and materials, does not affect the display effect of the display panel, and is low in price.

Description

Technical Field

[0001] The present invention relates to the field of touch control technology, and in particular to a touch control display device. Background Art

[0002] Many display products on the market, such as projectors, commercial monitors, and TVs, do not have touch interaction functions, making them difficult to operate.

[0003] At present, there are two main technologies for screen touch positioning, namely capacitive touch technology and infrared frame touch technology. The advantages of capacitive touch technology and infrared frame touch technology are high precision, small delay, and can realize touch and writing. However, capacitive touch technology has the disadvantages of high price, complex bonding process, affecting screen color, and matching the screen size one by one. Infrared frame touch technology has the disadvantages of matching the screen size one by one, large-size infrared frames are expensive, and the accuracy is reduced. Therefore, the above two technologies are not suitable for projectors, commercial monitors, TVs and other screen display products. Therefore, there is an urgent need for a screen touch positioning technology that is simple to install, has no restrictions on screen size and materials, does not affect the screen display effect, and is low in price. Summary of the invention

[0004] The present invention provides a touch display device. The touch position detection module in the touch display device of the embodiment of the present invention has high detection accuracy for the touch position of a touch object, is easy to install, has no restrictions on screen size and material, does not affect the display effect of the display panel, and has a low price.

[0005] According to one aspect of the present invention, there is provided a touch display device, comprising:

[0006] Display panel and touch position detection module;

[0007] The touch position detection module includes a touch position determination unit, a driving mechanism and at least two laser transceiver groups; each of the laser transceiver groups includes a laser transmitter and a laser receiver; the laser transceiver group is electrically connected to the touch position determination unit;

[0008] The laser transceiver group is mechanically connected to the driving mechanism, and the driving mechanism is used to drive the laser transceiver group to rotate around the rotation axis of the driving mechanism;

[0009] The at least two laser transceiver groups are arranged in sequence along the circumferential direction of the rotation axis of the driving mechanism; along the axial direction of the rotation axis of the driving mechanism, the distance between at least some of the laser transceivers and the light emitting surface of the display panel is different from the distance between other laser transceivers and the light emitting surface of the display panel;

[0010] The laser transmitter is used to transmit laser light; the laser receiver is used to receive laser light reflected by a touch object on the light-emitting surface of the display panel; and the touch position determination unit is used to determine the position of the touch object based on the transmitted laser light of the at least two laser transceiver groups and the reflected laser light of the touch object.

[0011] Optionally, the at least two laser transceiver groups are evenly arranged along the circumference of the rotation axis of the driving mechanism.

[0012] Optionally, along the axial direction of the rotation axis of the driving mechanism, the distances between different laser transceiver groups and the light emitting surface of the display panel are different.

[0013] Optionally, along the axial direction of the rotation axis of the driving mechanism, the distance between the at least two laser transceiver groups and the light emitting surface of the display panel gradually increases.

[0014] Optionally, the touch display device further includes:

[0015] a mounting shaft, the mounting shaft being mechanically connected to the driving mechanism;

[0016] The laser transceiver group is installed on the installation shaft;

[0017] The driving mechanism is used to drive the installation shaft to rotate, so that the installation shaft drives the laser transceiver group to rotate, wherein the installation shaft and the rotation axis of the driving mechanism are colinear.

[0018] Optionally, the touch display device further includes:

[0019] Computing module and control module;

[0020] The calculation module is electrically connected to the touch position determination unit and the control module respectively;

[0021] The touch position determination unit is used to determine the distance between the touch object and the laser transceiver group and the angle between the touch object and a preset direction according to the emitted laser of the laser transceiver group and the reflected laser of the touch object, and send the distance and the angle to the calculation module;

[0022] The calculation module is used to determine the touch coordinates of the touch object on the light-emitting surface of the display panel according to the distances and angles corresponding to the at least two laser transceiver groups, and send a touch event to the control module according to the touch coordinates;

[0023] The control module is used to control the display panel to respond according to the touch event.

[0024] Optionally, the touch display device further includes:

[0025] Control module;

[0026] The control module is electrically connected to the touch position determination unit;

[0027] The touch position determination unit is used to determine the distance between the touch object and the laser transceiver group and the angle between the touch object and a preset direction according to the emitted laser of the laser transceiver group and the reflected laser of the touch object, and send the distance and the angle to the control module;

[0028] The control module is used to determine the touch coordinates of the touch object on the light emitting surface of the display panel according to the distances and angles corresponding to the at least two laser transceiver groups, and control the display panel to respond according to the touch coordinates.

[0029] Optionally, the touch position determination unit is used to determine the distance between the touch object and the laser transceiver based on the emitted laser of each laser transceiver group and the reflected laser of the touch object, and to determine the angle between the touch object and the preset direction in combination with the position of the laser transceiver group and the rotation angle of the rotation axis of the driving mechanism.

[0030] Optionally, the touch position determination unit is used to control the rotation axis of the driving mechanism to rotate after the display device is turned on, and control the laser emitter to emit laser at a preset frequency;

[0031] Alternatively, the control module is used to send a start signal to the touch position determination unit after receiving a trigger signal from the user, and the touch position determination unit is used to control the driving mechanism to drive the rotating axis of the driving mechanism to rotate after receiving the start signal, and control the laser emitter to emit laser at a preset frequency.

[0032] Optionally, the touch position determination unit is connected to the calculation module via a serial port;

[0033] The calculation module is used to send the touch position to the control module via Bluetooth or USB HID protocol;

[0034] The driving mechanism includes a motor.

[0035] In the touch display device provided by the embodiment of the present invention, the driving mechanism is used to drive the laser transceiver group to rotate along the rotation axis of the driving mechanism; at least two laser transceiver groups are arranged in sequence along the circumferential direction of the rotation axis of the driving mechanism; along the axial direction of the rotation axis of the driving mechanism, the distance between at least some laser transceivers and the light emitting surface of the display panel is different from the distance between other laser transceivers and the light emitting surface of the display panel;

[0036] In this embodiment, the scanning directions and scanning heights of different laser transceiver groups are different. The rotating shaft of the driving mechanism rotates one circle and can scan the touch object n times. At the same motor speed, the scanning frequency can be increased by n times, and the position positioning is faster and more accurate. In addition, since the scanning frequency is greatly increased, a lower motor speed can be used, and the rotating shaft of the driving mechanism rotates each circle for a longer time, the calculation error of the corresponding relationship between the scanning point and the scanning direction is smaller, and the position determination is more accurate. Moreover, compared with high-speed motors, slow motors are less sensitive to vibration, temperature, and humidity, have a longer service life, and have lower environmental requirements. In addition, the embodiment of the present invention does not increase the number of motors, and can obtain a higher scanning frequency and ranging frequency, which has a lower cost. Therefore, the touch position detection module of the embodiment of the present invention has a faster position detection speed, a higher position detection accuracy, and a longer service life. At the same time, it is simple to install, has no requirements on the size and material of the display panel, does not affect the product display effect, and has a low cost.

[0037] It should be understood that the contents described in this section are not intended to identify the key or important features of the embodiments of the present invention, nor are they intended to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0039] Figure 1 is a schematic diagram of a touch display device provided by an embodiment of the present invention;

[0040] Figure 2 is a schematic diagram of a touch position detection module provided by an embodiment of the present invention;

[0041] Figure 3 is a schematic diagram of another touch position detection module provided by an embodiment of the present invention;

[0042] Figure 4 is a schematic diagram of a single-line laser radar provided by an embodiment of the present invention;

[0043] Figure 5 is a schematic diagram of a multi-line laser radar provided by an embodiment of the present invention;

[0044] Figure 6 is a top view of a touch position detection module provided by an embodiment of the present invention;

[0045] Figure 7is a top view of another touch position detection module provided by an embodiment of the present invention;

[0046] Figure 8 is a module schematic diagram of a touch display device provided by an embodiment of the present invention;

[0047] Fig. 9 It is a module schematic diagram of another touch display device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0048] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0049] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0050] An embodiment of the present invention provides a touch display device, Figure 1 is a schematic diagram of a touch display device provided by an embodiment of the present invention, Figure 2 is a schematic diagram of a touch position detection module provided by an embodiment of the present invention, Figure 3 FIG. 1 is a schematic diagram of another touch position detection module provided by an embodiment of the present invention. Figure 1-Figure 3 , the touch display device comprises:

[0051] Display panel 10 and touch position detection module 20;

[0052] The touch position detection module 20 includes a touch position determination unit, a driving mechanism 21 and at least two laser transceiver groups 23; each laser transceiver group 23 includes a laser transmitter and a laser receiver; the laser transceiver group 23 is electrically connected to the touch position determination unit;

[0053] The laser transceiver group 23 is mechanically connected to the driving mechanism 21, and the driving mechanism 21 is used to drive the laser transceiver group 23 to rotate around the rotation axis of the driving mechanism 21;

[0054] At least two laser transceivers 23 are arranged in sequence along the circumferential direction X of the rotation axis of the driving mechanism 21; along the axial direction Y of the rotation axis of the driving mechanism 21, the distance between at least some of the laser transceiver groups 23 and the light emitting surface of the display panel 10 is different from the distance between other laser transceiver groups 23 and the light emitting surface of the display panel 10;

[0055] The laser transmitter is used to transmit laser light, and the laser receiver is used to receive laser light reflected by an object touching the light emitting surface of the display panel 10;

[0056] The touch position determination unit is used to determine the position of the touch object according to the emitted lasers of at least two laser transceivers 23 and the reflected lasers of the touch object.

[0057] Among them, the display device can be a screen display product such as a projector, a commercial display, and a television. The display panel can be a projection screen of a projector or a self-luminous panel. The display panel 10 includes a display area 11 and a non-display area 12, and the non-display area 12 can surround the display area 11, and the display area 11 is used to display the picture. The touch position detection module 20 can be arranged in the display area of ​​the display panel 10, and can also be arranged in the non-display area of ​​the display panel 10. The light-emitting surface of the display panel 10 is the outermost surface on the side of the display panel 10 displaying the picture. The touch position detection module 20 may include two or more laser transceiver groups 23. When performing touch position detection, all laser transceiver groups 23 are located on the light-emitting side of the display panel 10. The drive mechanism 22 includes a motor. The distance between at least some of the laser transceiver groups 23 and the light-emitting surface of the display panel 10 is different from the distance between other laser transceiver groups 23 and the light-emitting surface of the display panel 10: the distance between different laser transceiver groups 23 and the light-emitting surface of the display panel 10 may be different; or at least two laser transceiver groups 23 may include at least two groups, each group of laser transceiver groups 23 and the light-emitting surface of the display panel 10 has the same distance, and different groups of laser transceiver groups 23 and the light-emitting surface of the display panel 10 have different distances. At least two laser transceiver groups 23 are arranged in sequence along the circumferential direction X, which may be uniformly arranged or non-uniformly arranged. The laser transceiver group 23 can be installed on a mounting shaft 22, and the mounting shaft 22 is mechanically connected to the rotating shaft of the driving mechanism 21 to achieve a mechanical connection between the laser transceiver group 23 and the driving mechanism 21. The laser transceiver group 23 can also be installed on other structures, and the other structures are connected to the rotating shaft of the driving mechanism 21. The driving mechanism 21 drives the other structures to rotate, thereby driving the laser transceiver group 23 to rotate.

[0058] The touch position detection module 20 is arranged on the light emitting side of the display panel 10. After the display device is turned on, the driving mechanism 21 can drive at least two laser transceiver groups 23 to rotate. The laser transmitter emits laser. When the touch object touches the light emitting surface of the display panel 10, the touch object reflects the laser, and the laser receiver receives the reflected laser. The touch position determination unit determines the distance between the touch object and the laser transceiver 23 according to the emitted laser of the laser transceiver group 23 and the reflected laser of the touch object, and the rotation angle of the rotation axis of the driving mechanism 21 can determine the touch position of the touch object.

[0059] Figure 4 is a schematic diagram of a single-line laser radar provided by an embodiment of the present invention, Figure 5 Schematic diagram of a multi-line laser radar provided by an embodiment of the present invention. Figure 4 , Figure 4 A laser transceiver A is installed on the axis C of the single-line laser radar. The laser transceiver A emits a laser. When it encounters an obstacle, the laser is reflected back and received by the laser transceiver A. The distance between the obstacle and the laser transceiver A can be determined by the time of flight (TOF) method or the triangulation method, thereby determining the position of the obstacle. The motor B drives the axis C to rotate at high speed, and the laser can obtain the position point cloud data of the laser transceiver A at a height of 360°, that is, the one-dimensional scanning surface D1.

[0060] refer to Figure 5 , Figure 5 In the multi-line laser radar, multiple sets of laser transceivers (A1, A2...An) are installed in the same scanning direction and at different heights on axis C. When motor B rotates one circle, each laser transceiver can determine a position, and a 360° two-dimensional scanning surface D2 can be obtained by combining the n positions determined by n laser transceivers.

[0061] The two key indicators in LiDAR positioning are ranging frequency Fc and scanning frequency Fs. The ranging frequency Fc is the number of times the laser transceiver transmits and receives within 1 second, which is the total number of points in the point cloud. The scanning frequency Fs is the number of times the target position result is given within 1 second. For planar positioning scenarios, the movement of fingers or pens on the plane, the higher the Fs, the faster the radar can get its latest position, that is, the higher the position refresh rate. The number of point clouds scanned per circle Nd = Fc / Fs. Under the premise of a certain Fs, the larger the Fc, the larger the Nd, that is, the more scanning points per circle, that is, the more scanning points of this object, then the more accurate the object's position calculation. Therefore, the higher Fc and Fs, the higher the number and accuracy of the touch positions obtained.

[0062] Figure 4 and Figure 5 The laser radars in the system all install the laser transceiver at the same angle, which leads to the following problems:

[0063] 1. The scanning frequency is not high enough. Motor B rotates one circle and can only scan the target once ( Figure 5 In the multi-line laser radar, multiple laser transceivers are installed in the same scanning direction of axis C, so the motor B can only scan the target once when it rotates one circle). After the laser scans the object, it must wait for the motor to rotate one circle before scanning again, that is, Fs = motor speed. The motor speed is not suitable for being very high. Currently, it is generally 5-25Hz. This plane positioning refresh rate is too low, and the user has obvious delays. If the motor speed is increased, the vibration will affect the motor life and measurement accuracy, which will lead to high requirements for the use scenario and stability, so the scanning frequency is not high enough.

[0064] 2. The position accuracy is not high enough. Due to the insufficient scanning frequency, the position refresh cannot keep up when the user's finger or pen moves in the plane, resulting in a large position error. Increasing the scanning frequency will result in less point cloud data per circle, and the point cloud obtained by the obstacle will also be less, or even undetectable, and the position calculation error will increase. When the finger or pen clicks the display panel, there will be a process of gradually approaching-stabilizing-leaving the screen, and entering and leaving is a moving state, an unstable state, and the point cloud data at this moment has a large error with the actual position. Since there is only one scanning surface, these point clouds cannot be distinguished, which will lead to a large position calculation error.

[0065] 3. High cost. If Fc and Fs are increased to meet the needs of planar positioning scenarios, the cost will be very high, and the accuracy will be lost and the product life will be shortened.

[0066] refer to Figure 2 and Figure 3 The touch position detection module of this embodiment adopts a multi-line laser radar and is provided with at least two laser transceiver groups 23; the at least two laser transceiver groups 23 are arranged in sequence along the circumferential direction X of the rotation axis of the driving mechanism 21; along the axial direction Y of the rotation axis of the driving mechanism 21, the distance between at least some of the laser transceiver groups 23 and the light emitting surface of the display panel 10 is different from the distance between other laser transceiver groups 23 and the light emitting surface of the display panel 10.

[0067] The touch position detection module of the embodiment of the present invention has the following advantages:

[0068] (1) Low motor speed, high scanning frequency

[0069] Since at least two laser transceiver groups 23 are arranged in sequence along the axial direction X of the rotating shaft of the driving mechanism 21, the scanning direction and scanning height of different laser transceiver groups 23 are different when the rotating shaft of the driving mechanism 21 rotates one circle, and each laser transceiver group 23 can scan the touch object once in the corresponding scanning direction, so the rotating shaft of the driving mechanism 21 can scan the touch object at least twice for each rotation of the rotating shaft. The scanning frequency Fs = motor speed * n, where n is the number of laser transceiver groups 23. At the same motor speed, the scanning frequency can be increased by n times, and the position positioning is faster and more accurate.

[0070] (2) More accurate plane positioning

[0071] The embodiment of the present invention can use a lower motor speed, each revolution time is longer, the calculation error of the corresponding relationship between the scanning point and the scanning direction will be smaller, and the angle will be more accurate. Each revolution of the motor scans the object n times, and the position positioning is faster and more accurate.

[0072] (3) Longer product life and lower environmental requirements

[0073] Since the slow motor is less sensitive to vibration, temperature and humidity than the high-speed motor and has a longer service life, the touch position detection module of this embodiment has a longer service life and lower environmental requirements.

[0074] (4) Lower costs

[0075] In the embodiment of the present invention, a touch position detection module uses a motor and at least two laser transceivers with different scanning directions to achieve high Fc and Fs. Compared with using a high Fc and high Fs single-line laser radar or two multi-line laser radars to achieve different scanning directions, the cost is lower.

[0076] (5) Easy installation

[0077] ① The touch position detection module in the embodiment of the present invention has no requirements for the installation position and can be installed at any position of the left, right, top or bottom of the display area. ② No capacitive screen bonding process is required. ③ No infrared frame customization is required for each size.

[0078] (6) There are no requirements for the display panel material. The laser radar scanning surface (touch position detection module) is suspended above the light-emitting surface of the display panel and can be installed on any projection screen, wall, or uneven LED screen.

[0079] (7) In the embodiment of the present invention, the touch position detection module does not block the display area relative to the capacitive screen, so it does not affect the display effect.

[0080] (8) In the embodiment of the present invention, the touch position detection module is opposite to the infrared frame, and no thick frame is added to the edge of the display panel, which does not affect the appearance of the product.

[0081] (9) For large-size display devices, the use of capacitive film or infrared frame technology is very expensive, while lidar has a wide coverage range and is cheap.

[0082] In the touch display device provided by the embodiment of the present invention, the touch position detection module 20 is arranged in sequence along the axial direction X of the rotating shaft of the driving mechanism 21, and the scanning directions and scanning heights of different laser transceiver groups 23 are different. The rotating shaft of the driving mechanism 21 rotates one circle, and can scan the touch object n times. At the same motor speed, the scanning frequency can be increased by n times, and the position positioning is faster and more accurate. Moreover, since the scanning frequency is greatly increased, a lower motor speed can be used, and the duration of each circle is longer. The calculation error of the corresponding relationship between the scanning point and the scanning direction will be smaller, and the position determination will be more accurate. Moreover, compared with high-speed motors, slow motors are less sensitive to vibration, temperature, and humidity, have a longer service life, and have lower environmental requirements. Moreover, the embodiment of the present invention does not increase the number of motors, and can obtain a higher scanning frequency and ranging frequency, which has a lower cost. Moreover, the touch position detection module of this embodiment has the advantages of simple installation, no requirements for display panel materials, no impact on product appearance, and low cost compared with capacitive touch technology and infrared frame touch technology.

[0083] Figure 6 is a top view of a touch position detection module provided by an embodiment of the present invention, Figure 7 is a top view of another touch position detection module provided by an embodiment of the present invention. Figure 6 and Figure 7 At least two laser transceiver groups 23 are evenly arranged along the circumferential direction X of the rotation axis of the driving mechanism 21.

[0084] Specifically, Figure 6 The figure shows a case where the touch position detection module includes two laser transceiver groups 23. The two laser transceiver groups 23 are evenly arranged along the circumferential direction X of the rotation axis of the driving mechanism 21, and the scanning angle between the two laser transceiver groups 23 (i.e., the angle of the laser light emitted by the laser transceiver groups 23) is 180°. Figure 7 The figure shows a case where the touch position detection module includes three laser transceiver groups 23. Along the circumferential direction X of the rotation axis of the driving mechanism 21, two laser transceiver groups 23 are evenly arranged, and the scanning angle between adjacent laser transceiver groups 23 (i.e., the angle α of the laser light emitted by adjacent laser transceiver groups 23) is 120°. When the touch position detection module includes n laser transceiver groups 23, along the circumferential direction X of the rotation axis of the driving mechanism 21, the scanning angle between adjacent laser transceiver groups 23 is 360° / n.

[0085] By arranging at least two laser transceiver groups 23 evenly along the circumferential direction X of the rotating shaft of the driving mechanism 21, when the rotating shaft of the driving mechanism 21 rotates, at least two laser transceiver groups 23 can scan the touch object at equal intervals, which facilitates the subsequent calculation of the touch position and reduces the difficulty of calculation.

[0086] Optionally, along the axial direction Y of the rotation axis of the driving mechanism 21 , the distances between different laser transceiver groups 23 and the light emitting surface of the display panel 10 are different.

[0087] This arrangement enables different laser transceiver groups 23 to have different scanning heights, which can better detect the touch process of the touch object approaching or moving away from the display panel, and avoid the touch process of the touch object approaching or moving away from the display panel affecting the position detection accuracy of the touch object.

[0088] Optionally, along the axial direction X of the rotation axis of the driving mechanism 21 , the distance between the at least two laser transceiver groups 23 and the light emitting surface of the display panel 10 gradually increases.

[0089] Specifically, taking the laser transceiver group 23 closest to the light emitting surface of the display panel 20 as a reference, the distance between at least two laser transceiver groups 23 and the light emitting surface of the display panel 10 gradually increases. In this arrangement, when the rotating shaft of the driving mechanism 21 rotates, the scanning height of the touch object by at least two laser transceiver groups 23 gradually increases, which can better detect the touch process of the touch object approaching or moving away from the display panel and reduce the difficulty of calculation.

[0090] Optionally, along the axial direction X of the rotation axis of the driving mechanism 21 , the distances between adjacent laser transceivers 23 are the same.

[0091] This arrangement can further reduce the difficulty of calculating the touch position and increase the speed of position determination.

[0092] Optional, reference Figure 2 and Figure 3 , the touch display device further comprises:

[0093] An installation shaft 22, the installation shaft 22 is mechanically connected to the driving mechanism 21;

[0094] The laser transceiver group 23 is mounted on the mounting shaft 22;

[0095] The driving mechanism 21 is used to drive the installation shaft 22 to rotate, so that the installation shaft 22 drives the laser transceiver group 23 to rotate, wherein the installation shaft 22 and the rotation axis of the driving mechanism 21 are colinear.

[0096] Specifically, when the rotating shaft of the driving mechanism 21 rotates, it drives the installation shaft 22 to rotate, thereby driving the laser transceiver group 23 to rotate, thereby realizing scanning of the touch object.

[0097] Figure 8 is a schematic diagram of a module of a touch display device provided by an embodiment of the present invention, and optionally, reference Figure 8 , the touch display device further comprises:

[0098] A calculation module 30 and a control module 40;

[0099] The calculation module 30 is electrically connected to the touch position determination unit 24;

[0100] The touch position determination unit 24 is used to determine the distance between the touch object and the laser transceiver group 23 and the angle between the touch object and the preset direction according to the emitted laser of the laser transceiver group 23 and the reflected laser of the touch object, and send the distance and angle to the calculation module 30;

[0101] The calculation module 30 is used to determine the touch coordinates of the touch object on the light-emitting surface of the display panel according to the distances and angles corresponding to the at least two laser transceiver groups 23, and send a touch event to the control module 40 according to the touch coordinates;

[0102] The control module 40 is used to control the display panel response according to the touch event.

[0103] Specifically, the calculation module 30 and the touch position determination unit 24 may be connected via a serial port, and the calculation module 30 and the control module 40 may communicate via Bluetooth or a USB HID protocol.

[0104] The control module 40 may be a main control module of the touch display device, used to control the display content of the display panel, etc. After the calculation module 30 sends a touch event to the control module 40, the control module 40 may adjust the display content of the display panel, or control the display panel to perform other operations, etc., which is not specifically limited in this embodiment.

[0105] The calculation module 30 can determine the touch coordinates of the touch object according to the angle and distance of each laser transceiver group 23 .

[0106] Exemplarily, within one rotation of the rotating shaft of the driving mechanism, the laser transceiver group 23 at a higher position receives the reflected light of the touch object, and a set of distances and angles can be determined. If the laser transceiver group 23 at a lower position does not receive the reflected light of the touch object, it is determined that the touch object does not touch the display panel, and the position determined by the received and received light of the laser transceiver group 23 at a higher position is not the touch position. Within one rotation of the rotating shaft of the driving mechanism, if all laser transceiver groups 23 receive the reflected light of the touch object, it is determined that the touch object touches the display panel, and the coordinates of the touch object can be comprehensively determined by combining the angles and distances determined by different laser transceiver groups 23.

[0107] Fig. 9is a schematic diagram of a module of another touch display device provided by an embodiment of the present invention, and optionally, reference Fig. 9 , the touch display device further comprises:

[0108] Control module 40;

[0109] The control module 40 is electrically connected to the touch position determination unit 24;

[0110] The touch position determination unit 24 is used to determine the distance between the touch object and the laser transceiver group 23 and the angle between the touch object and the preset direction according to the emitted laser of the laser transceiver group 23 and the reflected laser of the touch object, and send the distance and angle to the control module 40;

[0111] The control module 40 is used to determine the touch coordinates of the touch object on the light emitting surface of the display panel according to the distances and angles corresponding to the at least two laser transceiver groups 23, and control the display panel to respond according to the touch coordinates.

[0112] Specifically, the display device may not be provided with a calculation module. After the touch position determination module 24 determines the distance and angle of the touch object, it directly sends the distance and angle to the control module 40. The control module 40 calculates the touch coordinates according to the distance and angle.

[0113] Optionally, the touch position determination unit 24 is used to determine the distance between the touch object and the laser transceiver group 23 based on the emitted laser of each laser transceiver group 23 and the reflected laser of the touch object, and to determine the angle between the touch object and the preset direction based on the position of the laser transceiver group 23 and the rotation angle of the rotation axis of the driving mechanism.

[0114] Specifically, the preset direction may be any direction, and the preset direction may be set as required. For example, the preset direction may be the position of a laser transceiver group 23 when the rotation axis is located at the initial position.

[0115] The angle between the touch object and the preset direction reflects the scanning direction of the laser transceiver group 23. The angle between the direction of the laser emission and the preset direction can be determined according to the position of the laser transceiver group 23 and the rotation angle of the rotation axis of the driving mechanism, that is, the scanning direction can be determined. The coordinates of the touch object on the surface of the display panel can be determined in combination with the scanning direction and the distance between the touch object and the laser transceiver group 23.

[0116] Optionally, the touch position determination unit 24 is used to determine the distance between the touch object and the laser transceiver group 23 based on a TOF method or a triangulation method according to the emitted laser of each laser transceiver and the reflected laser of the touch object.

[0117] Specifically, the TOF method and the triangulation distance measurement method both have high distance measurement accuracy and are relatively mature. The TOF method and the triangulation distance measurement method can be used to accurately determine the distance between the touch object and the laser transceiver group 23 .

[0118] Optionally, the touch position determination unit 24 is used to control the rotation axis of the driving mechanism to rotate after the display device is turned on, and control the laser emitter to emit laser at a preset frequency;

[0119] Alternatively, the control module 40 is used to send a start signal to the touch position determination unit 24 after receiving a trigger signal from the user, and the touch position determination unit 24 is used to control the rotation of the rotating shaft driven by the driving mechanism after receiving the start signal, and control the laser emitter to emit laser at a preset frequency.

[0120] Specifically, the touch position determination unit 24 can start controlling the drive mechanism to rotate the rotating axis of the drive mechanism after the display device is turned on, and control the laser emitter to emit laser at a preset frequency, that is, perform touch position detection after the display device is turned on. This setting allows the touch display device to perform touch operations throughout the entire use process, thereby improving user operation flexibility.

[0121] In addition, the touch position determination unit 24 can also start the touch position detection after the user triggers, which can save power consumption. For example, a touch start button can be set in the touch display device to enable the user to control the start or end of the touch position detection.

[0122] It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps described in the present invention can be executed in parallel, sequentially or in different orders, as long as the desired results of the technical solution of the present invention can be achieved, and this document does not limit this.

[0123] The above specific implementations do not constitute a limitation on the protection scope of the present invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A touch display device, characterized in that: include: Display panel and touch position detection module; The touch position detection module includes a touch position determination unit, a drive mechanism and at least two laser transceiver groups; Each of the laser transceiver groups includes a laser transmitter and a laser receiver; the laser transceiver group is electrically connected to the touch position determination unit; The laser transceiver group is mechanically connected to the driving mechanism, and the driving mechanism is used to drive the laser transceiver group to rotate around the rotation axis of the driving mechanism; The at least two laser transceiver groups are arranged in sequence along the circumferential direction of the rotation axis of the driving mechanism; along the axial direction of the rotation axis of the driving mechanism, the distance between at least some of the laser transceivers and the light emitting surface of the display panel is different from the distance between other laser transceivers and the light emitting surface of the display panel; The laser transmitter is used to transmit laser light; the laser receiver is used to receive laser light reflected by a touch object on the light-emitting surface of the display panel; and the touch position determination unit is used to determine the position of the touch object based on the transmitted laser light of the at least two laser transceiver groups and the reflected laser light of the touch object.

2. The touch display device according to claim 1, characterized in that: The at least two laser transceiver groups are evenly arranged along the circumference of the rotation axis of the driving mechanism.

3. The touch display device according to claim 1 or 2, characterized in that: Along the axial direction of the rotation axis of the driving mechanism, the distances between different laser transceiver groups and the light emitting surface of the display panel are different.

4. The touch display device according to claim 1, wherein: Along the axial direction of the rotation axis of the driving mechanism, the distance between the at least two laser transceiver groups and the light emitting surface of the display panel gradually increases.

5. The touch display device according to claim 4, characterized in that: Also includes: a mounting shaft, the mounting shaft being mechanically connected to the driving mechanism; The laser transceiver group is installed on the installation shaft; The driving mechanism is used to drive the installation shaft to rotate, so that the installation shaft drives the laser transceiver group to rotate, wherein the installation shaft and the rotation axis of the driving mechanism are colinear.

6. The touch display device according to claim 1, characterized in that: Also includes: Computing module and control module; The calculation module is electrically connected to the touch position determination unit and the control module respectively; The touch position determination unit is used to determine the distance between the touch object and the laser transceiver group and the angle between the touch object and a preset direction according to the emitted laser of the laser transceiver group and the reflected laser of the touch object, and send the distance and the angle to the calculation module; The calculation module is used to determine the touch coordinates of the touch object on the light-emitting surface of the display panel according to the distances and angles corresponding to the at least two laser transceiver groups, and send a touch event to the control module according to the touch coordinates; The control module is used to control the display panel to respond according to the touch event.

7. The touch display device according to claim 1, characterized in that: Also includes: Control module; The control module is electrically connected to the touch position determination unit; The touch position determination unit is used to determine the distance between the touch object and the laser transceiver group and the angle between the touch object and a preset direction according to the emitted laser of the laser transceiver group and the reflected laser of the touch object, and send the distance and the angle to the control module; The control module is used to determine the touch coordinates of the touch object on the light emitting surface of the display panel according to the distances and angles corresponding to the at least two laser transceiver groups, and control the display panel to respond according to the touch coordinates.

8. The touch display device according to claim 6 or 7, characterized in that: The touch position determination unit is used to determine the distance between the touch object and the laser transceiver according to the emitted laser of each laser transceiver group and the reflected laser of the touch object, and to determine the angle between the touch object and the preset direction in combination with the position of the laser transceiver group and the rotation angle of the rotation axis of the driving mechanism.

9. The touch display device according to claim 6 or 7, characterized in that: The touch position determination unit is used to control the rotation axis of the driving mechanism to rotate after the display device is turned on, and to control the laser emitter to emit laser at a preset frequency; Alternatively, the control module is used to send a start signal to the touch position determination unit after receiving a trigger signal from the user, and the touch position determination unit is used to control the driving mechanism to drive the rotating axis of the driving mechanism to rotate after receiving the start signal, and control the laser emitter to emit laser at a preset frequency.

10. The touch display device according to claim 6, characterized in that: The touch position determination unit is connected to the calculation module via a serial port; The calculation module is used to send the touch position to the control module via Bluetooth or USB HID protocol; The driving mechanism includes a motor.

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