WO2011153919A1 - Synchronization method of cameras, control panel, touch screen, touch system and display - Google Patents

Abstract

The present invention relates to a synchronization method of cameras, a control panel, a touch screen, a touch system and a display. Wherein, said synchronization method of cameras applies to a touch screen with cameras; and the touch screen includes at least two cameras and at least two control panels corresponding to said at least two cameras one-to-one. Said at least two control panels include a first control panel and at least a second control panel. Said method includes generating a synchronization signal and sending the synchronization signal to said at least a second control panel; generating and sending an entering standby indication signal used to indicate said first camera to enter a standby mode to a first camera corresponding to said first control panel; generating and sending a quit standby indication signal used to indicate said first camera to quit a standby mode to said first camera. The present invention can realize a synchronized shooting of at least two cameras, and ensure the image accuracy of shooting.

Description

 Camera synchronization method, control panel, touch screen, touch system and display

 The present invention relates to the field of optoelectronic technology, and in particular, to a camera synchronization method, a control panel, a touch screen, a touch system, and a display. Background technique

 With the popularization of computer technology, a new lL interactive technology-touch rhinoceros technology appeared in the early 1990s. With this technology, the user can operate the computer by gently touching the graphic or text on the computer display screen with an object such as a pen or a pen, thereby freeing the keyboard and the mouse from the constraints, which greatly facilitates the user.

 Touch screens that are commonly used today include infrared touch screens and touch screens with cameras. Among them, the infrared touch exhibition uses a large number of one-to-one corresponding infrared transmitting tubes and infrared receiving tubes to determine the position information of the touch object, and the principle is relatively simple; however, since the infrared touch screen uses a large number of infrared components, the installation and debugging are complicated, so the production cost Higher; in addition, since the infrared transmitting tube and the infrared receiving tube are easily deteriorated, the reliability of the infrared touch screen is not high. The touch screen with a camera is widely used because of its simple structure, low cost, easy production, and high reliability.

 In a touch screen with a camera, the camera works in an active mode, that is, the camera continuously outputs image data at a fixed rate, and its output rate is only related to the input clock, and is not affected by other factors.

 Typically, in a touchscreen with a camera, each camera is connected to a control board, and the crystal oscillator on the control board provides an input clock to the camera. Since the output frequencies of the individual crystal oscillators are different, the input clocks of the respective cameras are different, so the output speeds of the respective cameras are also different, and the slight difference in the output rate will cause the photographing moments of the photo heads to be different, that is, the camera does not Simultaneous shooting. Thus, for moving objects, since the photographing moments of different cameras are different, the positions of the objects taken by different cameras are also different, so that the positioning accuracy of the touch object with the camera touch screen is lowered.

As shown in FIG. 1 , the touch target is set for the camera in the touch screen with the camera in the prior art. The schematic diagram of the position, the photographing moment of the camera A is the 1st second, the 11th second, the 21st second..., the photographing moment of the head B is the 5th second, the 15th second, the 25th second..., the photographing moment between the two cameras The difference is 4 seconds. It is assumed that at the 1st second, the touch object P is at the X position, and at the 5th second, the touch object P is moved to the Y position. Then, the touch object P photographed by the camera A is at the X position, and the touch object P photographed by the camera B is at the Y position, so that the position of the touch object P calculated by the touch panel with the camera is at the Z position, thereby visible, the touch object P The position has deviated. If the photographing moment of the image head B is the same as the photographing moment of the camera A, the position of the touch object P detected by the camera touch display should be at the X position, and at this time, the position of the touch object P is correct. If the photographing moment of the camera A is the same as the photographing moment of the camera B, the position of the object detected by the camera touch rhinoceros is at the Y position, and at this time, the position of the touch object P is also correct. In short, the asynchronous shooting of the camera is a very important reason for the reduced positioning accuracy of the touch object with the camera touch screen. Summary of the invention

 The invention provides a synchronization method of a camera, a control panel, a touch screen, a touch system and a display for realizing synchronous shooting of a camera with a camera touch screen, thereby ensuring the accuracy of the captured image data.

 The present invention provides a method for synchronizing a camera, the method being applied to a camera touch screen including at least two cameras and at least two control boards corresponding to the at least two cameras, the at least two control boards including a first control panel and at least one second control panel, the method comprising:

 The first control board generates a synchronization signal and transmits the synchronization signal to the at least one second control board;

 Generating and transmitting an incoming sleep indication signal for instructing the first camera to enter a sleep mode to a first camera corresponding to the first control panel;

 And generating an exit sleep indication signal for instructing the first camera to exit the sleep mode to the first camera.

The present invention also provides a method for synchronizing a camera, the method being applied to a camera touch comprising at least two cameras and at least two control boards corresponding to the at least two cameras in one-to-one correspondence The at least two control boards include a first control board and at least one second control board, and the method includes:

 The second control board receives a synchronization signal sent by the first control board;

 Generating and transmitting a sleep indication signal for instructing the second camera to enter a sleep mode to a second camera corresponding to the second control panel;

 And generating an exit sleep indication signal for instructing the second camera to exit the sleep mode to the second camera.

 The present invention also provides a first control board, the first control board is applied to a camera touch screen including at least two cameras and at least two control boards corresponding to the at least two cameras, the at least two The block control board includes a piece of the first control board and at least one second control board, and the first control board includes:

 a synchronization signal generating and transmitting module, configured to generate a synchronization signal and send the synchronization signal to the at least one second control board;

 a first entering a sleep indication signal generating and transmitting module, configured to generate and send an incoming sleep indication signal for instructing the first camera to enter a sleep mode to a first camera corresponding to the first control board;

 And a first exiting sleep indication signal generating and transmitting module, configured to generate and send an exit sleep indication signal for instructing the first camera to exit the resume mode to the first camera.

 The present invention also provides a second control board, the second control board is applied to a camera touch screen including at least two cameras and at least two control boards corresponding to the at least two cameras, the at least two The block control board includes a first control board and at least one of the second control boards, and the second control board includes:

 a synchronization signal receiving module, configured to receive a synchronization signal sent by the first control board; a second enter sleep indication signal generation and transmission module, configured to generate and send to a second camera corresponding to the second control board Instructing the second camera to enter a sleep mode to enter a sleep indication signal;

And a second exit sleep indication signal generation and transmission module, configured to generate and send an exit sleep indication signal for indicating that the Kth image head exits the Hugh type to the second camera. The present invention also provides a touch screen comprising at least two cameras, at least two illumination sources, a retroreflective strip or a touch object mounted with a retroreflective strip, and a processing unit, at least one illumination source is installed in the vicinity of each camera, Included in the at least two control boards that are in one-to-one correspondence with the at least two cameras, the at least two control boards include a first control board and at least one second control board;

 The first control board is configured to generate a synchronization signal and send the synchronization signal to the at least one second control board, generate and send to the first camera corresponding to the first control board to indicate the Entering a sleep indication signal of a camera entering a sleep mode, generating and sending an exit sleep indication signal for instructing the first camera to exit the sleep mode to the first camera;

 The second control board is configured to receive a synchronization signal sent by the first control board, generate and send a sleep to the second camera corresponding to the second control board to instruct the second camera to enter a sleep mode. The indication signal generates and sends an exit sleep indication signal for instructing the Kth head to exit the sleep mode to the second camera.

 The present invention also provides a touch screen comprising at least two cameras, at least one illumination source mounted around the touch detection area of the camera touch screen, and a processing unit, further comprising a one-to-one correspondence with the at least two cameras At least two control boards, the at least two control boards include a first control board and at least one second control board;

 The first control board is configured to generate a synchronization signal and send the synchronization signal to the at least one second control board, generate and send to the first camera corresponding to the first control board to indicate the Entering a sleep indication signal of a camera entering a sleep mode, generating and sending an exit sleep indication signal for instructing the first camera to exit the sleep mode to the first camera;

 The second control board is configured to receive a synchronization signal sent by the first control board, generate and send a sleep to the second camera corresponding to the second control board to instruct the second camera to enter a sleep mode. The indication signal generates and sends an exit sleep indication signal for instructing the Kth head to exit the sleep mode to the second camera.

The invention also provides a touch system, comprising at least two cameras, at least two illumination sources, a retroreflective strip or a touch object mounted with a retroreflective strip, and a processing unit, wherein at least one illumination source is installed in the vicinity of each camera, and at least two control panels corresponding to the at least two cameras are respectively included, The at least two control boards include a first control board and at least one second control board; wherein

 The first control board is configured to generate a synchronization signal and send the synchronization signal to the at least one second control board, generate and send to the first camera corresponding to the first control board to indicate the Entering a sleep indication signal of a camera entering a sleep mode, generating and sending an exit sleep indication signal for instructing the first camera to exit the sleep mode to the first camera;

 The second control board is configured to receive a synchronization signal sent by the first control board, generate and send a sleep to the second camera corresponding to the second control board to instruct the second camera to enter a sleep mode. The indication signal generates and sends an exit sleep indication signal for instructing the Kth head to exit the sleep mode to the second camera.

 The present invention also provides a touch system comprising at least two cameras, at least one illumination source mounted around the touch detection area of the camera touch screen, and a processing unit, further comprising a one-to-one correspondence with the at least two cameras At least two control boards, the at least two control boards include a first control board and at least one second control board;

 The first control board is configured to generate a synchronization signal and send the synchronization signal to a first camera and the at least one second control board corresponding to the first control board, generate and send to the first camera And entering an sleep indication signal for instructing the first camera to enter a sleep mode, generating and sending an exit sleep indication signal for instructing the first camera to exit the sleep mode to the first camera;

 The second control board is configured to receive a synchronization signal sent by the first control board, generate and send a sleep to the second camera corresponding to the second control board to instruct the second camera to enter a sleep mode. The indication signal generates and sends an exit sleep indication signal for instructing the Kth head to exit the sleep mode to the second camera.

The present invention also provides a display comprising a display unit and a touch screen, the touch screen comprising at least two cameras, at least around the touch detection area of the camera touch screen a light source, and a processing unit, the touch screen further comprising at least two control boards corresponding to the at least two cameras, the at least two control boards comprising a first control board and at least one second control board ; among them,

 The first control board is configured to generate a synchronization signal and send the synchronization signal to the at least one second control board, generate and send to the first camera corresponding to the first control board to indicate the Entering a sleep indication signal of a camera entering a sleep mode, generating and sending an exit sleep indication signal for instructing the first camera to exit the sleep mode to the first camera;

 The second control board is configured to receive a synchronization signal sent by the first control board, generate and send a sleep to the second camera corresponding to the second control board to instruct the second camera to enter a sleep mode. The indication signal generates and sends an exit sleep indication signal for instructing the Kth head to exit the sleep mode to the second camera.

 In the present invention, under the coordination of the synchronization signals, each control board can control the simultaneous sleep mode of each camera, and then exit the sleep mode at the same time, so that each camera can simultaneously stop acquiring image data, and at the same time start collecting image data, achieving at least Simultaneous shooting of the two cameras ensures the accuracy of the captured images. DRAWINGS

 1 is a schematic view of a touch object positioned by a camera in a touch screen with a camera in the prior art;

 2 is a schematic flow chart of a first embodiment of a method for synchronizing a camera according to the present invention; FIG. 3 is a schematic flowchart of a second embodiment of a method for synchronizing a camera according to the present invention; A schematic structural view of an embodiment;

 Figure 5 is a schematic structural view of a first embodiment of a second control board of the present invention;

 6 is a schematic structural view of a second embodiment of a first control board of the present invention;

 7 is a schematic structural view of a second embodiment of a second control board of the present invention;

 Figure 8 is a schematic structural view of a third embodiment of the first control board of the present invention;

Figure 9 is a schematic structural view of a third embodiment of the second control board of the present invention; 10 is a schematic structural view of a first embodiment of a touch screen with a camera according to the present invention; FIG. 11 is a schematic structural view of a second embodiment of a touch screen with a camera according to the present invention; FIG. 13 is a schematic structural view of an embodiment of a display of the present invention. detailed description

 The invention is further described below in conjunction with the drawings and specific embodiments.

 First embodiment of a synchronization method of a camera

 The embodiment can be applied to a camera touch screen including at least two camera heads and at least two control boards corresponding to at least two cameras, and at least two control boards include a first control board and at least one second The control board, wherein each control board has a crystal oscillator, and can provide a clock signal to the camera corresponding to the control board.

 As shown in FIG. 2, which is a schematic flowchart of a first embodiment of a synchronization method of a camera of the present invention, the method for synchronizing the image header includes the following steps:

 Step 21: The first control board generates a synchronization signal and sends the synchronization signal to at least one second control board;

 Step 22: The first control board generates and sends a sleep indication signal to the first camera. Specifically, the first camera corresponds to the first control board, and the enter sleep indication signal is used to indicate the first camera sleep mode, when the first camera ^ After the break mode, stop collecting image data;

 Step 23: The first control board generates and sends an exit sleep indication signal to the first camera. The exit sleep indication signal is used to indicate that the first camera exits the sleep mode, and after the first camera exits the sleep mode, continues to collect image data.

 Step 24: The second control board receives the synchronization signal sent by the first control TL;

 Step 25: The second control board generates and sends a sleep indication signal to the second camera corresponding to the second control board.

Specifically, the sleep indication signal is used to indicate the second camera ^ sleep mode, and when the second camera enters the sleep mode, the image data is stopped to be collected; Step 26: The second control board generates and sends an exit sleep indication signal to the second camera. The exit sleep indication signal is used to instruct the second camera to exit the sleep mode. After the K-th head exits the sleep mode, the image data is continuously collected.

 It should be noted that there is no strict sequence relationship between step 22-step 23 and step 24-step 26.

 In this embodiment, when the first control board sends the synchronization signal, immediately instructing the first camera mode to make the first camera stop collecting image data, and then immediately instructing the first camera to exit the sleep mode to make the first camera After acquiring the image data, the second control board immediately instructs the second camera to enter the sleep mode after the synchronization signal sent by the first control board is received, so that the second camera stops collecting the image data, and then immediately instructs the second camera to exit the sleep mode. The second camera is caused to start acquiring image data. Since the synchronization signal is transmitted very fast, the transmission time of the synchronization signal can be neglected. In this way, each camera can simultaneously stop acquiring image data under the control of each control board, and simultaneously start collecting image data, thereby realizing synchronization of each camera. Shooting.

 In this embodiment, under the coordination of the synchronization signals, each control board can control each camera to simultaneously stop the BR mode, and then exit the sleep mode at the same time, so that each camera can simultaneously stop acquiring image data, and simultaneously start collecting image data. , Simultaneous shooting of at least two cameras is achieved, ensuring the accuracy of the captured images.

 Second embodiment of a synchronization method of a camera

 As shown in FIG. 3, a schematic flowchart of a second embodiment of a method for synchronizing a camera of the present invention is different from the previous embodiment in that, before step 21, the following steps may be further included: Step 31: First Control The board sends initialization data to the first camera;

 Specifically, the initialization data is used to initialize the first camera.

 The following steps may also be included before step 24:

 Step 32: The second control board sends initialization data to the second camera.

 Specifically, the initialization data is used to initialize the second camera.

In steps 31 and 32, the initialization data is stored in a register inside each camera. After initialization, each camera starts a clock signal transmitted on the corresponding control board. Image data is acquired under control. Since the initialization time of each camera is different, after the initialization, the cameras are not synchronized, but after steps 22 to 23 and steps 24 to 26, the cameras are synchronized.

 In this embodiment, each camera reaches synchronization after being started, but if the clocks of the respective cameras are inconsistent, after a period of time, the cameras will no longer be synchronized, and at this time, steps 21 to 26 need to be re-executed. Synchronize each camera again. Preferably, the time interval between adjacent two synchronizations is greater than 10 ms, and in order to avoid affecting normal use, each synchronization needs to be performed in a state of no touch operation.

 Further, in this embodiment, the control board can control the start and stop of the camera by the following two methods: The first method is to control the start and stop of the camera by controlling the sleep mode pin. Specifically, the camera has a sleep mode tube. When the status of the sleep mode pin is valid, for example, low level, the camera sleep mode stops generating data. When the status of the sleep mode pin is invalid, for example, the high level, the camera exits the sleep. Mode, restarting the acquisition of image data, therefore, through the hardware setting, that is, setting the state of the sleep mode pin of the camera, the camera can be simultaneously activated. The second method is to control the start and stop of the camera by setting the internal sleep register (Standby Register). When the status of the internal sleep register is valid, for example, the data "1", the camera ^ sleep mode, stop collecting data, when the internal sleep When the state of the register is invalid, for example, the data "0", the camera exits the sleep mode, and the image data is restarted, which is different from the first method in that the second method is a software setting method.

If the first method is adopted, in step 22, the first control board sends a state for setting the sleep mode pin of the first camera to be valid to the first camera to make the first camera The sleep mode pin effective setting signal, in step 23, the first control board sends a sleep mode for the first camera to set the state of the sleep mode pin of the first camera to be invalid to cause the first camera to exit the sleep mode. The pin invalid setting signal, in step 25, the second control board sends a sleep mode pin for transmitting the state of the sleep mode pin of the second camera to be effective to make the second camera enter the sleep mode to the second camera. Setting a signal, in step 26, the second control board sends a sleep mode pin for the second camera to the second camera. The status is set to invalid to cause the second camera to exit the sleep mode pin invalid setting signal of the sleep mode.

 In this embodiment, under the coordination of the synchronization signals, each control board can control each camera to simultaneously stop the BR mode, and then exit the sleep mode at the same time, so that each camera can simultaneously stop acquiring image data, and simultaneously start collecting image data. , Simultaneous shooting of at least two cameras is achieved, ensuring the accuracy of the captured images.

 First embodiment of the first control board

 The embodiment can be applied to a camera touch screen including at least two camera heads and at least two control boards corresponding to at least two cameras, and at least two control boards include a first control board and at least one second The control board, wherein each control board has a crystal oscillator, and can provide a clock signal to the camera corresponding to the control board.

 As shown in FIG. 4, it is a schematic structural diagram of a first embodiment of a first control board according to the present invention. The first control board includes a synchronization signal generation and transmission module 41, a first incoming sleep indication signal generation and transmission module 42 and a first The sleep indication signal generation and transmission module 43 is exited. The first sleep indication signal generation and transmission module 42 is connected to the synchronization signal generation and transmission module 41, and the first exit sleep indication signal generation and transmission module 43 is connected to the first incoming sleep indication signal generation and transmission module 42.

 The synchronization signal generating and transmitting module 41 is configured to generate a synchronization signal and send the synchronization signal to the first camera and the at least one second control board corresponding to the first control board. The first entering sleep indication signal generating and transmitting module 42 is configured to generate and send a sleep indication signal for indicating the first camera to sleep mode to the first camera; and stop acquiring image data after the first camera is in the sleep mode. The first exit sleep indication signal generation and transmission module 43 is configured to generate and send an exit sleep indication signal for instructing the first camera to exit the sleep mode to the first camera; and after the first camera exits the resume mode, continue to acquire image data.

 First embodiment of the second control board

As shown in FIG. 5, it is a schematic structural diagram of a first embodiment of a second control board according to the present invention. The second control board includes: a synchronization signal receiving module 51, a second entering sleep indication signal generating and transmitting module 52, and a second The sleep indication signal generation and transmission module 53 is exited. Among them, the second ^Hugh The B-instruction signal generation and transmission module 52 is connected to the synchronization signal receiving module 51, and the second exiting sleep indication signal generating and transmitting module 53 and the second entering the sleep indication signal generating and transmitting module

52 connections.

 The synchronization signal receiving module 51 is configured to receive the synchronization signal sent by the first control. The second it^ sleep indication signal generating and transmitting module 52 is configured to generate and send an incoming sleep indication signal for instructing the second camera to enter the sleep mode to the second camera corresponding to the second control panel; after the second camera enters the sleep mode , stop collecting image data. The second exit sleep indication signal generation and transmission module 53 is configured to generate and send an exit sleep indication signal for instructing the second camera to exit the sleep mode to the second camera; after the second camera exits the rest mode, the image data is continuously collected.

 In the first control board of the first embodiment, after the synchronization signal generation and transmission module 41 generates the synchronization signal and transmits the synchronization signal to the first camera and the second control board, the first entering the sleep indication signal generation and transmission module 42 Immediately generating and sending a sleep indication signal to the first camera to cause the first camera to stop acquiring image data, and then the first exit sleep indication signal generation and transmission module 43 immediately generates and sends an exit sleep indication signal to the first camera to make the first The camera starts collecting image data. The synchronization signal receiving module 51 of the second control board of the embodiment receives the synchronization signal sent by the first control board, and then the second entering the sleep indication signal generation and transmission module 52 immediately generates and sends the second camera corresponding to the second control board. The sleep indication signal is sent to cause the second camera to stop acquiring image data, and then the second exit sleep indication signal generation and transmission module 53 immediately generates and sends an exit sleep indication signal to the second camera to cause the second camera to start acquiring image data. Since the transmission of the synchronization signal is very fast, the transmission time of the synchronization signal can be neglected, so that each camera can stop acquiring image data under the control of each control board at the same time, and simultaneously start collecting image data, thereby realizing synchronization of each camera. Shooting.

In this embodiment, under the coordination of the synchronization signals, each of the control boards can control each camera to simultaneously perform the sleep mode, and then simultaneously exit the sleep mode, so that each camera can simultaneously stop acquiring image data, and simultaneously start collecting image data. Simultaneous shooting of at least two cameras is achieved, ensuring the accuracy of the captured images. Second embodiment of the first control board

 As shown in FIG. 6 , it is a schematic structural diagram of a second embodiment of the first control board of the present invention, which is different from the first embodiment in that the first control board of this embodiment may further include a first initialization data transmission. Module 44, which is coupled to synchronization signal generation and transmission module 41. The first initialization data transmitting module 44 is configured to send initialization data for initializing the first camera to the first camera before the synchronization signal generation and transmission module 41 generates the synchronization signal.

 Further, in the embodiment, the first incoming sleep indication signal generation and transmission module 42 may specifically be the first sleep mode pin effective setting module 61, and the first exit sleep indication signal generation and transmission module 43 may specifically be the first The sleep mode pin invalid setting module 62 „ the first sleep mode pin valid setting module 61 is configured to generate and send a sleep mode for the first camera to the first camera after the first initialization data sending module 44 sends the initialization data. The state of the pin is set to be effective to cause the first camera to enter the sleep mode pin valid setting signal of the sleep mode. The first sleep mode pin invalid setting module 62 is configured to send the sleep mode in the first sleep mode pin valid setting module 61. After the pin is effectively set, the sleep mode pin invalid setting signal for generating the state of the sleep mode pin of the first camera to be invalid to cause the first camera to exit the sleep mode is generated and sent to the first camera.

 Second embodiment of the second control board

 As shown in FIG. 7 , it is a schematic structural diagram of a second embodiment of the second control board of the present invention, which is different from the first embodiment in that the second control board of the embodiment may further include a second initialization data transmission. Module 54, which is coupled to sync signal receiving module 51. The second initialization data transmitting module 54 is configured to send initialization data for initializing the second camera to the second camera before the synchronization signal receiving module 51 receives the synchronization signal sent by the first control.

Further, in this embodiment, the second enter sleep indication signal generation and transmission module 52 is specifically a second sleep mode pin effective setting module 71, and the second exit sleep indication signal generation and transmission module 53 is specifically a second sleep mode. The pin invalid setting module 72. The second sleep mode pin valid setting module 71 is configured to generate and send to the second camera, after the second initialization data sending module 54 sends the initialization data, to set the state of the sleep mode pin of the second camera to be effective. The second camera enters the sleep mode pin effective setting signal of the sleep mode. Second rest The sleep mode pin invalid setting module 72 is configured to generate and send a sleep mode pin for the second camera to the second camera after the second sleep mode pin valid setting module 71 sends the sleep mode pin valid setting signal. The status is set to invalid to cause the second camera to exit the sleep mode pin invalid setting signal of the sleep mode.

 In the first control board of the second embodiment, the first initialization data transmitting module 44 transmits initialization data to the first camera to initialize the camera, and then the synchronization signal generation and transmission module 41 generates a synchronization signal and transmits the synchronization signal to the first The second control board, the first sleep mode pin effective setting module 61 generates and sends a sleep mode pin effective setting signal to the first camera to cause the first camera to enter the sleep mode, and the first sleep mode pin invalid setting module 62 generates and The first camera transmits a sleep mode pin invalid setting signal to cause the first camera to exit the sleep mode. In the second control board of the embodiment, after the second initialization data transmitting module 54 sends the initialization data to the second camera, the synchronization signal receiving module 51 receives the synchronization signal sent by the first control, and then the second switch is valid. The setting module 71 generates and sends a sleep mode pin valid setting signal to the K-th head to cause the second camera to enter the sleep mode, and the second sleep mode pin invalid setting module 72 generates and sets a disable signal to the second camera sleep mode pin. In order to cause the second camera to exit the sleep mode, each camera can be simultaneously turned off to achieve synchronization of the respective cameras.

In this embodiment, each camera can be synchronized after being activated. However, if the clocks of the respective cameras are inconsistent, after a period of time, the cameras will no longer be synchronized. At this time, the synchronization signal generation and transmission module 41 is regenerated. The synchronization signal is sent to the second control board, and the first sleep mode pin effective setting module 61 regenerates and sends a sleep mode pin effective setting signal to the first camera to cause the first camera to enter the sleep mode, the first sleep The mode pin invalid setting module 62 regenerates and sends a sleep mode pin invalid setting signal to the first camera to cause the first camera to exit the rest mode, and the synchronization signal receiving module 51 receives the synchronization signal sent by the first control device. The second sleep mode pin effective setting module 71 generates and sends a sleep mode pin valid setting signal to the second camera to cause the second camera to enter the sleep mode, and the second sleep mode pin invalid setting module 72 generates and sleeps to the second camera. The mode pin invalid setting signal causes the second camera to exit the sleep mode, thereby Camera capable of simultaneously achieve synchronization. Optimal Ground, the time interval between two adjacent synchronizations is greater than 10ms. In order to avoid affecting normal use, each synchronization needs to be performed in a state of no touch operation.

 In this embodiment, under the coordination of the synchronization signals, each control board can control each camera to simultaneously stop the BR mode, and then exit the sleep mode at the same time, so that each camera can simultaneously stop acquiring image data, and simultaneously start collecting image data. , Simultaneous shooting of at least two cameras is achieved, ensuring the accuracy of the captured images.

 Third embodiment of the first control board

 As shown in FIG. 8 , it is a schematic structural diagram of a third embodiment of the first control board of the present invention, which is different from the first embodiment of the first control board in that the first control board of this embodiment may further include The first initialization data transmitting module 44 is connected to the synchronization signal generating and transmitting module 41. The first initialization data transmitting module 44 is configured to send initialization data for initializing the first camera to the first camera before the synchronization signal generation and transmission module 41 generates the synchronization signal.

 Further, in the embodiment, the first incoming sleep indication signal generating and transmitting module 42 may specifically be the first internal sleep register effective setting module 81, and the first exiting sleep indication signal generating and transmitting module 43 may specifically be the first internal The sleep register is invalid setting module 82. The first internal sleep register valid setting module 81 is configured to: after the first initialization data sending module 44 sends the initialization data, generate and send the first camera to set the state of the internal sleep register of the first camera to be valid to make the first The camera enters the internal sleep register valid setting signal of sleep mode. The first internal sleep register invalid setting module 82 is configured to: after the first internal sleep register valid setting module 82 sends the internal sleep register valid setting signal, generate and send a status setting for the first camera internal sleep register to the first camera. The internal sleep register invalid setting signal that is invalid to cause the first camera to exit the sleep mode.

 Third embodiment of the second control board

As shown in FIG. 9, a schematic structural view of a third embodiment of the second control board of the present invention is different from the first embodiment of the second control board in that the second control board of the embodiment may further include The second initialization data transmitting module 54 is connected to the synchronization signal receiving module 51. The second initialization data sending module 54 is configured to send initialization data for initializing the second camera to the second camera before the synchronization signal receiving module 51 receives the synchronization signal sent by the first control. Further, in this embodiment, the second incoming sleep indication signal generation and transmission module 52 is specifically a second internal sleep register valid setting module 91, and the second exit sleep indication signal generation and transmission module 53 is specifically a second internal sleep register. Invalid setting module 92.

 The second internal sleep register valid setting module 91 is configured to: after the second initialization data sending module 54 sends the initialization data, generate and send the second camera to set the state of the internal sleep register of the second camera to be valid to enable the second The camera enters the internal sleep register valid setting signal of sleep mode. The second internal sleep register invalid setting module 92 is configured to: after the second internal sleep register valid setting module 91 sends the internal sleep register valid setting signal, generate and send a status setting for the second camera internal sleep register to the second camera. The internal sleep register invalid setting signal is invalid to cause the second camera to exit the sleep mode.

 In the first control board of the third embodiment, the first initialization data transmitting module 44 transmits initialization data to the first camera to initialize the camera, and then the synchronization signal generation and transmission module 41 generates a synchronization signal and transmits the synchronization signal to the first The second control board, the first internal sleep register effective setting module 81 generates and sends an internal sleep register valid setting signal to the first camera to cause the first camera to enter the sleep mode, and the first internal sleep register invalid setting module 82 generates and sends the first camera to the first camera. The internal sleep register invalid setting signal is sent to cause the first camera to exit the sleep mode. In the second control board of the embodiment, after the second initialization data transmitting module 54 sends the initialization data to the second camera, the synchronization signal receiving module 51 receives the synchronization signal sent by the first control, and then the second internal sleep register effective setting module. 91 generates and sends an internal sleep register valid setting signal to the second camera to cause the second camera to enter the sleep mode, and the second internal sleep register invalid setting module 92 generates and sends an internal sleep register invalid setting signal to the K-th head to make the second The camera exits the sleep mode, so that each camera can be stopped at the same time, and the synchronization of each camera is realized.

In this embodiment, each camera reaches synchronization after startup, but if the clocks of the respective cameras are inconsistent, after a period of time, the cameras will no longer be synchronized, and at this time, the synchronization signal of the first control board The generating and transmitting module 41 regenerates the synchronization signal and sends the synchronization signal to the second control board, and the first sleep mode pin effective setting module 61 regenerates and sends a sleep mode pin effective setting signal to the first camera to make the first camera Enter sleep mode, first rest The sleep mode pin invalid setting module 62 regenerates and sends a sleep mode pin invalid setting signal to the first camera to cause the first camera to exit the sleep mode. The synchronization signal receiving module 51 of the second control board receives the synchronization signal sent by the first control, and the second internal sleep register valid setting module 91 generates and sends an internal sleep register valid setting signal to the second camera to make the second camera The second internal sleep register invalid setting module 92 generates and sends an internal sleep register invalid setting signal to the second image head to cause the second camera to exit the sleep mode, thereby enabling the respective cameras to simultaneously achieve synchronization. Preferably, the time interval between adjacent two synchronizations is greater than 10 ms. In order to avoid affecting normal use, each synchronization needs to be performed in a state of no touch operation.

 In this embodiment, under the coordination of the synchronization signals, each control board can control each camera to simultaneously stop the BR mode, and then exit the sleep mode at the same time, so that each camera can simultaneously stop acquiring image data, and simultaneously start collecting image data. , Simultaneous shooting of at least two cameras is achieved, ensuring the accuracy of the captured images.

 First embodiment of touching a corpse

 As shown in FIG. 10, which is a schematic structural view of a first embodiment of the present invention, the touch screen of the present embodiment may include a touch screen frame 120, at least two cameras 1211,

1212... 121n, at least two illumination sources 1221, 1222 122m, retroreflective strip 123, processing unit 127, and at least two control boards 1241, 1242 ... 124n, where m and n are natural numbers greater than or equal to two. The inside of the touch screen frame 120 is a touch detection area 126. At least two cameras 1211, 1212, ..., 121n are installed around the touch detection area 126, and at least one illumination source is installed in the vicinity of each camera. Preferably, the illumination source is installed in Next to the camera, optionally, the light source is mounted above or below the camera, the retroreflective strip 123 is mounted around the touch detection area 126, and at least two control boards 1241, 1242, ... 124n and at least two cameras 1211, 1212 ... 121η corresponds to and is connected. At least two control panels 1241, 1242...

124n includes a first control board 1241 and at least one second control board 1242 ... 124n.

Retroreflective strip 123 is used to reflect light emitted by at least two illumination sources 1221, 1222, ... 122m to at least two cameras 1211, 1212, ... 121n. At least two cameras 1211, 1212, ..., 121n are used to acquire image data. The processing unit 127 is configured to use at least two cameras 1111, 1112... 11 The image data acquired by In acquires the position information of the touch object. The first control board 1241 is configured to generate a synchronization signal and send the synchronization signal to the at least one second control board 1242... 124n, generate and send a sleep indication signal to the first camera for instructing the first camera to enter the sleep mode, and generate And sending an exit sleep indication signal for instructing the first camera to exit the sleep mode to the first camera. The second control board is configured to receive a synchronization signal sent by the first control board 1241, generate and send a sleep indication signal for instructing the second camera to enter the sleep mode to the second camera corresponding to the second control board, and generate a The second camera transmits an exit sleep indication signal for instructing the K-th head to exit the resume mode.

 In this embodiment, the first control board 1241 generates a synchronization signal and transmits the synchronization signal to at least one second control board 1242... 124n, and then the first control board 1241 immediately generates and sends a sleep indication signal to the first camera. The first camera is brought into the sleep mode, and the exiting sleep indication signal is generated and sent to the first camera to cause the first camera to exit the sleep mode. After receiving the synchronization signal sent by the first control board 1241, the second control board generates and sends a sleep indication signal to the second camera corresponding to the second control board to cause the second camera to enter the sleep mode, and then generates a The second camera sends an exit sleep indication signal to cause the third head to exit the sleep mode. Since the synchronization signal is transmitted very fast, the transmission time of the synchronization signal can be neglected, so that each camera can stop acquiring image data at the same time under the control of each control board, and simultaneously start collecting image data, thereby realizing the respective cameras. Simultaneous shooting.

 It should be noted that the embodiment may not include the touch screen frame 120.

 This embodiment may also include all the contents of the foregoing embodiment of the control board, and details are not described herein again.

 In this embodiment, under the coordination of the synchronization signals, each control board can control each camera to simultaneously stop the BR mode, and then exit the sleep mode at the same time, so that each camera can simultaneously stop acquiring image data, and simultaneously start collecting image data. , Simultaneous shooting of at least two cameras is achieved, ensuring the accuracy of the captured images.

 Second embodiment of touching a corpse

As shown in FIG. 11 , it is a schematic structural diagram of a second embodiment with a camera touch rhinoceros according to the present invention. The touch screen of this embodiment may include a touch screen frame 120 and at least two cameras 1111. 1112... ll ln, at least two illumination sources 1221, 1222 122m, touch object P, processing unit 127, and at least two control boards 1241, 1242 ... 124n, where m and n are natural numbers greater than or equal to two. The inside of the touch screen frame 120 is a touch detection area 126, and at least two cameras 1111, 1112, ... 11 In are installed around the touch detection area 126, and at least one illumination source is installed in the vicinity of each camera, preferably, the illumination source Installed beside the camera, optionally, the light source is mounted above or below the camera, and the touch object P is mounted with a retroreflective strip 123, at least two control boards 1241, 1242, ... 124n and at least two cameras 1111.

1112... 111η corresponds to and is connected. At least two of the control boards 1241, 1242, ... 124n include a first control board 1241 and at least one second control board 1242 ... 124n.

 The retroreflective strip 123 is used to reflect the light emitted by the at least two illumination sources 1221, 1222 122m onto the touch object P to at least two of the image heads 1111, 1112, ..., l l ln. At least two of the cameras 1211, 1212, ... 121n are used to acquire image data. The processing unit 127 is configured to acquire position information of the touch object based on the image data acquired by the at least two cameras 1111, 1112, ..., 111n. The first control board 1241 is configured to generate a synchronization signal and send the synchronization signal to the at least one second control board 1242... 124n, generate and send an incoming sleep indication signal to the first camera for instructing the first camera to enter the sleep mode, and generate And sending an exit sleep indication signal for instructing the first camera to exit the sleep mode to the first camera. The second control board is configured to receive a synchronization signal sent by the first control board 1241, generate and send a sleep indication signal for instructing the second camera to enter the sleep mode to the second camera corresponding to the second control panel, and generate a The second camera transmits an exit sleep indication signal for instructing the camera head to exit the sleep mode.

In this embodiment, the first control board 1241 generates a synchronization signal and transmits the synchronization signal to at least one second control board 1242... 124n, and then the first control board 1241 immediately generates and sends a sleep indication signal to the first camera. The first camera is brought into the sleep mode, and the exiting sleep indication signal is generated and sent to the first camera to cause the first camera to exit the sleep mode. After receiving the synchronization signal sent by the first control board 1241, the second control board generates and sends a sleep indication signal to the second camera corresponding to the second control board to cause the second camera to enter the sleep mode, and then generates a The second camera sends an exit sleep indication signal to cause the third head to exit the sleep mode. Since the sync signal is transmitted very fast, the transmission time of the sync signal can be ignored. Slightly, in this way, each camera can stop acquiring image data at the same time under the control of each control panel, and at the same time start collecting image data, thereby realizing synchronous shooting of each camera.

 It should be noted that the embodiment may not include the touch screen frame 120. The shape of the cross section of the touch object P may be a circle, a square, a triangle, or any other shape.

 This embodiment may also include all the contents of the foregoing embodiment of the control board, and details are not described herein again.

 In this embodiment, under the coordination of the synchronization signals, each of the control boards can control each camera to simultaneously perform the sleep mode, and then simultaneously exit the sleep mode, so that each camera can simultaneously stop acquiring image data, and simultaneously start collecting image data. Simultaneous shooting of at least two cameras is achieved, ensuring the accuracy of the captured images.

 Third embodiment of touch screen

 As shown in FIG. 12, which is a schematic structural diagram of a third embodiment of the touch screen with a camera of the present invention, the touch screen of the embodiment may include a touch screen frame 120, at least two cameras 1211,

1212... 121η , at least one illumination source 1221, 1222 122m, a processing unit, and at least two control boards 1241, 1242 ... 124n, where m is a natural number greater than or equal to 1, and n is a natural number greater than or equal to 2. The inside of the touch screen frame 120 is a touch detection area 126, and at least two photo heads 1211, 1212, ..., 121n are mounted around the touch detection area 126, and at least one of the illumination sources 1221, 1222, ..., 122m is mounted on the touch. Around the detection area 126, at least two control boards 1241, 1242, ..., 124n are associated with and connected to at least two of the image heads 1111, 1112, ..., 111n. At least two of the control boards 1241, 1242, ... 124n include a first control board 1241 and at least one second control board 1242 ... 124n.

 At least one illumination source 1221, 1222 ... 122m emits light to at least two cameras

1211, 1212... 121n„ At least two image heads 1211, 1212, ..., 121n are used to acquire image data. The processing unit 127 is configured to acquire a touch object according to image data acquired by at least two cameras 1111, 1112, ..., 111n. Position information: The first control board 1241 is configured to generate a synchronization signal and send the synchronization signal to the at least one second control board 1242... 124n, generate and send a sleep indication to the first camera for instructing the first camera to enter the sleep mode. The signal generates and sends an exit sleep indication signal for instructing the first camera to exit the sleep mode to the first camera. The second control board is configured to receive a synchronization signal sent by the first control board 1241, generate and send a sleep indication signal for instructing the second camera to enter the sleep mode to the second camera corresponding to the second control board, and generate a The second camera transmits an exit sleep indication signal for instructing the second camera to exit the sleep mode.

 In this embodiment, the first control board 1241 generates a synchronization signal and transmits the synchronization signal to at least one second control board 1242...124n, and then the first control board 1241 immediately generates and sends a sleep indication signal to the first camera. The first camera is brought into the sleep mode, and the exiting sleep indication signal is generated and sent to the first camera to cause the first camera to exit the sleep mode. After receiving the synchronization signal sent by the first control board 1241, the second control board generates and sends a sleep indication signal to the second camera corresponding to the second control board to cause the second camera to enter the sleep mode, and then generates a The second camera sends an exit sleep indication signal to cause the K-th head to exit the sleep mode. Since the synchronization signal is transmitted very fast, the transmission time of the synchronization signal can be neglected, so that each camera can stop acquiring image data under the control of each control board at the same time, and simultaneously start collecting image data, thereby realizing the respective cameras. Simultaneous shooting.

 It should be noted that the embodiment may not include the touch screen frame 120.

 This embodiment may also include all the contents of the foregoing embodiment of the control board, and details are not described herein again.

 In this embodiment, under the coordination of the synchronization signals, each of the control boards can control each camera to simultaneously perform the sleep mode, and then simultaneously exit the sleep mode, so that each camera can simultaneously stop acquiring image data, and simultaneously start collecting image data. Simultaneous shooting of at least two cameras is achieved, ensuring the accuracy of the captured images.

 Touch system embodiment

 This embodiment may include all of the foregoing embodiments of the touch screen, and details are not described herein again.

 Embodiment of display

As shown in FIG. 13 , which is a schematic structural diagram of an embodiment of a display of the present invention, the display of the embodiment may include a display unit and a touch screen 133 . The display unit includes a display screen 131 and a display frame 132. The touch screen 133 is installed in front of the display screen 131 and is close to the user. One side, and is located inside the display frame 132.

 In addition, the touch screen 133 can also be mounted outside the display frame 132, and the touch screen 133 can also be mounted integrally with the display frame 132.

 The touch screen 133 may include all the contents of the foregoing embodiments of the touch screen, and details are not described herein again.

 The technical solutions described in the present invention are not limited to the embodiments described in the specific embodiments. Other embodiments are obtained by those skilled in the art in accordance with the technical solution of the present invention, and are also within the scope of the technical innovation of the present invention.

Claims

Rights request

 A method for synchronizing a picture head, the method being applied to a camera touch screen comprising at least two cameras and at least two control boards in one-to-one correspondence with the at least two cameras, wherein The at least two control boards include a first control board and at least one second control board, and the method includes:

 The first control board generates a synchronization signal and transmits the synchronization signal to the at least one second control board;

 Generating and transmitting an incoming sleep indication signal for instructing the first camera to enter a sleep mode to a first camera corresponding to the first control panel;

 And generating an exit sleep indication signal for instructing the first camera to exit the sleep mode to the first camera.

 The method according to claim 1, wherein the entering the sleep indication signal is specifically: setting a state of the sleep mode pin of the first camera to be effective to enable the first camera to enter The sleep mode pin setting signal of the sleep mode;

 The exiting sleep indication signal is specifically: a sleep mode pin invalid setting signal for setting a state of the sleep mode pin of the first camera to be invalid to cause the first camera to exit the sleep mode.

 The method according to claim 1, wherein the entering the sleep indication signal is specifically: setting a state of an internal sleep register of the first camera to be effective to make the first camera The BR^ internal sleep register is effective to set the signal;

 The exiting sleep indication signal is specifically: an internal sleep register invalid setting signal for setting a state of the internal sleep register of the first camera to be invalid to cause the first camera to exit the sleep mode.

 The method according to any one of claims 1-3, wherein before the first control board generates the synchronization signal and transmits the synchronization signal to the at least one second control board, the method further comprises:

 Initialization data for initializing the first camera is transmitted to the first camera.

5, a synchronization method of the image head, the method is applied to include at least two cameras and The camera touch screen of the at least two control boards corresponding to the at least two cameras is characterized in that the at least two control boards comprise a first control board and at least one second control board, and the method comprises:

 The second control board receives a synchronization signal sent by the first control board;

 Generating and transmitting a sleep indication signal for instructing the second camera to enter a sleep mode to a second camera corresponding to the second control panel;

 And generating an exit sleep indication signal for instructing the second camera to exit the sleep mode to the second camera.

 The method according to claim 5, wherein the entering the sleep indication signal is specifically: setting a state of the sleep mode pin of the second camera to be effective to enable the second camera to enter The sleep mode pin setting signal of the sleep mode;

 The exiting sleep indication signal is specifically: a sleep mode pin invalid setting signal for setting a state of the sleep mode pin of the second camera to be invalid to cause the second camera to exit the sleep mode.

 The method according to claim 5, wherein the entering the sleep indication signal is specifically: configured to set a state of an internal sleep register of the second camera to be effective such that the Kth head is ^^ The internal sleep register of the Hugh type effectively sets the signal;

 The exiting sleep indication signal is specifically: setting an internal idle register invalid setting signal for setting the state of the internal sleep register of the second camera to be invalid such that the second camera exits the sleep mode.

 The method according to any one of claims 5-7, further comprising: before the receiving, by the second control board, the synchronization signal sent by the first control board:

 Initialization data for initializing the second camera is transmitted to the second camera.

9. A first control board, the first control board being applied to a camera touch screen comprising at least two cameras and at least two control boards in one-to-one correspondence with the at least two cameras, wherein The at least two control boards include a first control panel and at least one second control panel, and the first control panel includes:

a synchronization signal generation and transmission module, configured to generate a synchronization signal and send the synchronization signal Giving the at least one second control panel;

 a first entering a sleep indication signal generating and transmitting module, configured to generate and send an incoming sleep indication signal for instructing the first camera to enter a sleep mode to a first camera corresponding to the first control board;

 And a first exiting sleep indication signal generating and transmitting module, configured to generate and send an exit sleep indication signal for instructing the first camera to exit the resume mode to the first camera.

 The first control board according to claim 9, wherein the first incoming sleep indication signal generating and transmitting module is specifically a first sleep mode pin effective setting module, configured to generate and report to the first a camera transmits a sleep mode pin valid setting signal for setting a state of a sleep mode pin of the first camera to be effective to cause the first camera to enter a sleep mode;

 The first exit sleep indication signal generation and transmission module is specifically a first sleep mode pin invalidation setting module, and configured to: after the first sleep mode pin effective setting module sends the sleep mode pin effective setting signal, And generating, to the first camera, a sleep mode pin invalid setting signal for setting a state of the sleep mode pin of the first camera to be invalid to cause the first camera to exit the sleep mode.

 The first control board according to claim 9, wherein the first incoming sleep indication signal generating and transmitting module is specifically: a first internal sleep register effective setting module, configured to generate and report to the a camera transmitting an internal sleep register valid setting signal for setting a state of an internal sleep register of the first camera to be effective to cause the first camera to enter a sleep mode;

 The first exit sleep indication signal generating and transmitting module is specifically configured to: a first internal sleep register invalid setting module, configured to generate, after the first internal sleep register valid setting module sends the internal sleep register valid setting signal An internal sleep register invalidation setting signal for setting the state of the internal sleep register of the first camera to be invalid to cause the first camera to exit the sleep mode is transmitted to the first camera.

The first control board according to any one of claims 9-11, wherein the first control board further comprises: And a first initialization data sending module, configured to send initialization data for initializing the first camera to the first camera before the synchronization signal generation and transmission module generates the synchronization signal.

 13. A second control board, the second control board being applied to a camera touch screen comprising at least two cameras and at least two control boards corresponding to the at least two cameras, wherein The at least two control boards include a first control board and at least one of the second control boards, and the second control board includes:

 a synchronization signal receiving module, configured to receive a synchronization signal sent by the first control board; a second enter sleep indication signal generation and transmission module, configured to generate and send to a second camera corresponding to the second control board Instructing the second camera to enter a sleep mode to enter a sleep indication signal;

 And a second exit sleep indication signal generation and transmission module, configured to generate and send an exit sleep indication signal for indicating that the Kth image head exits the sleep mode to the second camera.

 The second control board according to claim 13, wherein the second incoming sleep indication signal generating and transmitting module is specifically: a second sleep mode pin effective setting module, configured to generate and The second camera transmits a sleep mode pin effective setting signal for setting a state of the sleep mode pin of the second camera to be effective to cause the second camera to enter a sleep mode;

 The second exit sleep indication signal generation and transmission module is specifically configured to: a second sleep mode pin invalidation setting module, configured to: after the second sleep mode pin effective setting module sends the sleep mode pin effective setting signal And generating, to the second camera, a sleep mode pin invalid setting signal for setting a state of the sleep mode pin of the second camera to be invalid to cause the second camera to exit the sleep mode.

The second control board according to claim 13, wherein the second incoming sleep indication signal generating and transmitting module is specifically: a second internal sleep register effective setting module, configured to generate and report to the The second camera transmits an internal sleep register valid setting signal for setting a state of the internal sleep register of the second camera to be effective to cause the second camera to enter a sleep mode; The second exit sleep indication signal generating and transmitting module is specifically configured to: a second internal sleep register invalid setting module, configured to generate, after the second internal sleep register valid setting module sends the internal sleep register valid setting signal And transmitting, to the second camera, an internal sleep register invalid setting signal for setting a state of the internal sleep register of the second camera to be invalid to cause the second camera to exit the idle mode.

 The second control board according to any one of claims 13-15, wherein the second control board further comprises:

 And a second initialization data sending module, configured to send initialization data for initializing the second camera to the second camera before the synchronization signal receiving module receives the synchronization signal sent by the first control board.

 17. A touch screen comprising at least two cameras, at least two illumination sources, a retroreflective strip or a touch object mounted with a retroreflective strip, and a processing unit, wherein at least one illumination source is mounted adjacent each camera, wherein The method further includes at least two control boards corresponding to the at least two cameras, the at least two control boards including a first control board and at least one second control board;

 The first control board is configured to generate a synchronization signal and send the synchronization signal to the at least one second control board, generate and send to the first camera corresponding to the first control board to indicate the Entering a sleep indication signal of a camera entering a sleep mode, generating and sending an exit sleep indication signal for instructing the first camera to exit the sleep mode to the first camera;

 The second control board is configured to receive a synchronization signal sent by the first control board, generate and send a sleep to the second camera corresponding to the second control board to instruct the second camera to enter a sleep mode. The indication signal generates and sends an exit sleep indication signal for instructing the Kth head to exit the sleep mode to the second camera.

18. A touch screen comprising at least two cameras, at least one illumination source mounted around the touch detection area of the camera touch screen, and a processing unit, further comprising one or more of the at least two cameras Corresponding at least two control boards, the at least two control boards comprising a first control board and at least one second control board; The first control board is configured to generate a synchronization signal and send the synchronization signal to the at least one second control board, generate and send to the first camera corresponding to the first control board to indicate the Entering a sleep indication signal of a camera entering a sleep mode, generating and sending an exit sleep indication signal for instructing the first camera to exit the sleep mode to the first camera;

 The second control board is configured to receive a synchronization signal sent by the first control board, generate and send a sleep to the second camera corresponding to the second control board to instruct the second camera to enter a sleep mode. The indication signal generates and sends an exit sleep indication signal for instructing the Kth head to exit the sleep mode to the second camera.

 19. A touch system comprising at least two cameras, at least two illumination sources, a retroreflective strip or a touch object mounted with retroreflective strips, and a processing unit, at least one illumination source mounted adjacent to each camera, characterized The method further includes at least two control boards that are in one-to-one correspondence with the at least two cameras, wherein the at least two control boards include a first control board and at least one second control board;

 The first control board is configured to generate a synchronization signal and send the synchronization signal to the at least one second control board, generate and send to the first camera corresponding to the first control board to indicate the Entering a sleep indication signal of a camera entering a sleep mode, generating and sending an exit sleep indication signal for instructing the first camera to exit the sleep mode to the first camera;

 The second control board is configured to receive a synchronization signal sent by the first control board, generate and send a sleep to the second camera corresponding to the second control board to instruct the second camera to enter a sleep mode. The indication signal generates and sends an exit sleep indication signal for instructing the Kth head to exit the sleep mode to the second camera.

 20. A touch system comprising at least two cameras, at least one illumination source mounted around the touch detection area of the camera touch screen, and a processing unit, further comprising: at least two At least two control boards corresponding to the first one, the at least two control boards include a first control board and at least one second control board;

The first control board is configured to generate a synchronization signal and send the synchronization signal to the first a first camera corresponding to a control panel and the at least one second control panel, generating and sending an incoming sleep indication signal to the first camera for instructing the first camera to enter a sleep mode, generating and reporting to the first camera a camera sends an exit sleep indication signal for instructing the first camera to exit the sleep mode;

 The second control board is configured to receive a synchronization signal sent by the first control board, generate and send a sleep to the second camera corresponding to the second control board to instruct the second camera to enter a sleep mode. The indication signal generates and sends an exit sleep indication signal for instructing the Kth head to exit the sleep mode to the second camera.

 21. A display comprising a display unit and a touch screen, the touch screen comprising at least two cameras, at least two illumination sources, a retroreflective strip or a touch object mounted with retroreflective strips, and a processing unit, installed near each camera At least one illumination source, wherein the touch screen further includes at least two control boards corresponding to the at least two cameras, the at least two control boards including a first control board and at least one second Control panel;

 The first control board is configured to generate a synchronization signal and send the synchronization signal to the at least one second control board, generate and send to the first camera corresponding to the first control board to indicate the Entering a sleep indication signal of a camera entering a sleep mode, generating and sending an exit sleep indication signal for instructing the first camera to exit the sleep mode to the first camera;

 The second control board is configured to receive a synchronization signal sent by the first control board, generate and send a sleep to the second camera corresponding to the second control board to instruct the second camera to enter a sleep mode. The indication signal generates and sends an exit sleep indication signal for instructing the Kth head to exit the sleep mode to the second camera.

 22. A display comprising a display unit and a touch screen, the touch screen comprising at least two cameras, at least one illumination source mounted around the touch detection area of the camera touch screen, and a processing unit, wherein The touch screen further includes at least two control boards corresponding to the at least two cameras, the at least two control boards including a first control board and at least one second control board;

The first control board is configured to generate a synchronization signal and send the synchronization signal to the at least a second control board, generating and sending an incoming sleep indication signal for instructing the first camera to enter a sleep mode to the first camera corresponding to the first control board, generating and transmitting to the first camera for An exiting sleep indication signal indicating that the first camera exits the sleep mode;

 The second control board is configured to receive a synchronization signal sent by the first control board, generate and send a sleep to the second camera corresponding to the second control board to instruct the second camera to enter a sleep mode. The indication signal generates and sends an exit sleep indication signal for instructing the Kth head to exit the sleep mode to the second camera.