JPH051009Y2 - - Google Patents

Description

[Detailed description of the invention] "Industrial application field" This invention relates to an automatic switching operation device for a laser disc player device, which can repeatedly operate a laser disc player device alone, alternately switch between two devices, and operate three laser disk player devices. This invention relates to an automatic switching operation device for sequential switching and regeneration operation on more than one machine.

"Conventional technology" Conventionally, automatic switching operation is performed using VTR devices, and it is common to alternately switch between two VTR devices for regeneration operation, but when sequential switching operation of three VTR devices is required. requires a separate device, it is not possible to select the operation method with the same device, and it has a unique timer function to set the operation start and end time and current time, and the time will vary even if multiple devices are installed. There is no uniformity in management, resulting in some delays in the start of operation. In addition, in recent years, laser disc player devices have become widespread, and automatic switching operation using laser disc player devices has been desired, but there is a big difference in the operation control of conventional VTR devices and laser disc player devices, There was a problem that required an automatic switching operation device.

``Problem to be solved by the invention'' In view of the above-mentioned circumstances, the present invention allows for the connection of at least three laser disc player devices, and allows for easy single-play (repeat operation with one device) by the corresponding switch.
It is possible to alternately switch between two units, sequentially switch between three units, and select the operation mode, perform regenerative operation, and also provide unified time operation management and operation information management when multiple units are installed. The present invention provides an automatic switching operation device that enables this.

"Means for solving the problem" This proposal is an automatic operation switching device that can connect at least three laser disc player devices (hereinafter referred to as LD devices), and a first operation mode in which each LD device is repeatedly operated independently. and an operation mode setting switch that can set a second operation mode in which two of each LD device are alternately switched and operated, and a third operation mode in which all LD devices are sequentially switched and operated, and the above settings. There is an operation mode discrimination means for discriminating each operation mode set by the switch, and a means for discriminating each operation mode based on signals from a connected timer device.
a communication control means for controlling the movement and stopping of the operation of the LD device; and a communication control means for generating a regeneration or stop command signal according to the operation mode based on the operation mode determined by the discrimination means, and a signal from the communication control means. an operation control means that generates a maneuver or stop signal based on the operation control means, and receives a regeneration or stop command signal from the operation control means and transmits it to each of the above-mentioned LD devices, and when each LD device is in operation, receives a signal from each LD device. A communication control circuit that receives status signals and constantly communicates with each LD device, and a communication control circuit that receives status signals from the communication control circuit and communicates with each LD device at all times.
an operation mode detection means for detecting the operation mode of the LD device and sending an operation mode signal corresponding to the operation mode to the operation control means; and operation of each LD device based on the operation or stop signal from the operation control means. and a mobile switch for stopping the LD device, and the operation control means controls regeneration and stop of each LD device in any of the operation modes selected by the setting switch, and controls the LD device to operate in the first mode.
The present invention is constituted by an automatic operation switching device in a laser disc player, which is characterized in that playback is possible in any one of the three operating modes.

“Example” This proposal is based on a laser disc player device (hereinafter referred to as
LD device) Three LD devices can be connected, and three LD devices can be connected individually (repeat with one device) by specifying the corresponding switch.
This is an automatic switching operation device that allows continuous operation, with alternate switching operation with two units, and sequential switching operation with three units, and a one-chip microcomputer that centrally controls the device. and the address of the microcomputer
A circuit that stores "a communication processing program between the device operation control processing device, the LD device, and the external timer device" corresponding to the ROM (read-only memory element) connected to the data input/output terminal and the address of the microcomputer. and the data input/output terminal, and connect the communication control circuit that performs "serial data communication with the LD device" to the data transmission/reception terminal and the microcomputer output terminal, and connect the "three
A first communication circuit corresponding to the first LD device (hereinafter referred to as the 1st LD device) and a second communication circuit (hereinafter referred to as the 1st LD device) of the communication circuit that supports the LD devices and performs sequential connection control of communication lines.
a second communication circuit corresponding to the third device (hereinafter referred to as the third LD device); a third communication circuit corresponding to the third device (hereinafter referred to as the third LD device);
Furthermore, a switch input is connected to the input terminal of the microcomputer to specify "operation permission of the first LD device, second LD device, and third LD device and operation modes such as independent operation, alternating switching operation, and sequential switching operation." circuit (hereinafter referred to as the first switch circuit) and a switch input circuit (hereinafter referred to as the first switch circuit) that is valid during alternate switching operation and sequential switching operation and specifies the "same title (when a laser disc disc with the same content is divided into several discs)" A first relay circuit corresponding to the first LD device of the relay circuit that is connected to the output terminal of the microcomputer and "outputs the video and audio signals of the playback LD device", and a second switch circuit corresponding to the second LD device The second relay circuit and the third relay circuit corresponding to the third LD device perform polling-type data communication with the attached external timer device, and the device address (unique identification number) signal indicates the start of operation of the LD device. a communication control circuit built into the microcomputer that receives "operation information with an end time signal added thereto" and transmits "operation information with an equipment address signal added with signals of LD device playback, abnormal operation, and operation mode"; input to the communication interface circuit connected to the microcomputer,
An automatic switching operation device is constituted by a switch input circuit (hereinafter referred to as a third switch circuit) that responds to a device address signal of operation information.

The 1-chip microcomputer 15 is a semiconductor integrated circuit, and is an 8-bit microcomputer with a CMOS structure that integrates a 16-bit ALU (arithmetic logic unit), RAM, timer, counter, general-purpose serial interface, etc., and is a well-known IC.
It executes instructions according to the program electrically written in the ROM. The communication control circuit 7 that performs serial data communication with the LD device is an integrated circuit for serial communication in a microcomputer system,
It is composed of semiconductors that provide electrical insulation, such as well-known transistors and photocouplers. Also, each LD
The first communication circuit 8, the second communication circuit 8', and the third communication circuit 8'', which are directly connected to the serial interface circuit of the device, are composed of semiconductor switches having control terminals. The second switch circuit 2, which specifies the same title as the first switch circuit 1, and the third switch circuit 6, which specifies the device address, are rotary type digital code switches, which have a binary coded decimal circuit configuration and can be manually operated. The information is input to the microcomputer using 10 positions from 0 to 9. Furthermore, the first switch circuit 1 and the second switch circuit 2 are configured with a 1-digit decimal number, and the third switch circuit 6 is configured with a 1-digit decimal number.
It consists of two decimal digits. The first relay circuit 10, second relay circuit 10', and third relay circuit 10'' that control the output of video and audio signals by the playback operation of the LD device are well-known relay contacts, and each output terminal is connected in parallel. There is also an interface circuit 5 that performs data communication with an external timer device.
consists of well-known transistors and photocouplers, and is electrically isolated from the communication interface circuit of the external timer device.

"Operation" The operation of the present invention will be explained with reference to an electrical block diagram showing one embodiment. In Figure 1, 1 is the decimal number "0" in the first switch circuit (operation mode setting switch).
It has 10 levels of code from 9 to 9, and has 7 actions depending on the decimal number. For example, if the number is "1", only the connected first LD device is allowed to operate, and is operated independently. The number is "2"
In this case, permit the operation of the 1st LD and 2nd LD devices to be connected, and both devices will operate independently. If the number is "3", 3 of the 1st LD, 2nd LD, and 3rd LD devices to be connected
Permission is granted for the operation of all three machines, and all three machines are operated independently. Furthermore, if the number is "4", the 1st LD and 2nd LD to be connected
Permit the device to operate, and perform alternating switching operation between the two devices. If the number is “5”, the number to connect
Permits the operation of three 1LD, 2nd LD, and 3rd LD devices,
Perform sequential switching operation with three units. When the number is "6", the two connected first and second LD devices are alternately operated, and one third LD device is operated independently. If the number is “7”, the 1st LD and 1st LD to be connected
We gave permission to operate three 2LD and 3rd LD devices, and
It functions as a program soft mode selection that causes two third LD devices to operate alternately and one first LD device to operate independently.

Reference numeral 2 denotes a second switch circuit, which has the same circuit configuration as the first switch circuit, and has four functions depending on the designation of the decimal number. For example, if the number is "0",
There are no identical titles. If the number is "1", the laser discs of the first LD and second LD devices have the same title. If the number is “2”, the
The laser disc discs of 2LD and 3rd LD have the same title. If the number is “3”, the 1st LD,
The laser disc discs of the 2nd LD and 3rd LD devices have the same title. From the above, this designation is effective in alternate switching operation with two units or sequential switching operation with three units, and makes a difference when the operation end time comes in the middle of broadcasting a program. That is, when the number is "0", the commercial power of the LD device is turned off after the LD device currently broadcasting detects the end of the program. On the other hand, when the number is "1" and the LD device currently broadcasting is the 1st LD device, the broadcast continues (broadcasting starts on the 1st LD device and ends on the 2nd LD device), and then continues broadcasting the program on the 2nd LD device. After detecting the end of the process, turn off the commercial power to the 1st LD and 2nd LD devices. The same operation is performed for the number "2". Also, when the number is "3", if the LD device currently broadcasting is the 1st LD device (broadcasting starts with the 1st LD device and ends with the 3rd LD device), the 2nd LD,
Broadcasting continues with the 3rd LD device, and after detecting the end of the program on the 3rd LD device, the commercial power to the 1st LD, 2nd LD, and 3rd LD device is turned off. Furthermore, even if the LD device currently broadcasting is the second LD device, the broadcast continues, and after detecting the end of the program on the third LD device, the commercial power supply is similarly turned off.

3 is a manual switch that manually starts the operation of the LD device all at once as an incidental element, and has a well-known mechanical structure locking function, and the contact is always in the "open" state, and when starting the operation, it is Switch the contact to the “closed” state and set the switch level to “0”
It is a mechanism that holds the

4, 4' are board connector terminals that connect the communication line with the external timer device, and have 3 poles.
are connected in parallel on the board, and input from 4, and 4' serves as an output terminal to other devices. 5 is a communication interface circuit with an external timer device;
It plays a relay role with the communication control means 18 built into the microcomputer. The communication control means 18 and the external timer device are such that the external timer device serves as a master station, and the present means 18 serves as a slave station (this means 1
8 may be connected to multiple devices), and the data format is "1 start + 8 data + 1 stop and even parity".
The communication speed is 1200 baud (the number of bits that can be sent and received per second). This means 18 from an external timer device
is a 1-byte (8-bit) device address signal that is operating information, a 1-byte operation start/stop signal, and a 2-byte CRC (which detects or corrects a block of data error). cyclic code). If the received operation start bit is “1”, the corresponding device address is
A command to start operation of the LD device is given to the operation control means 20. On the other hand, from this means 18 to the external timer device, a device address signal of "1 byte" which is operation information based on the signal from the third switch circuit 6 and a "1 byte" device address signal based on the signal from the operation mode detection means 19 are sent.
Identification signals for reproducing and abnormal operation of the 1st LD, 2nd LD, and 3rd LD devices of "Byte", and a signal for determining the operation mode of "1 Byte" based on the signal from the operation mode discrimination means 16, and a signal for determining the operation mode of "2 Byte" CRC signal is sent.

6 is a third switch circuit for specifying a device address. The switch has the same circuit configuration as the first and second switch circuits, has a two-digit decimal number, is numbered based on the broadcast program system, and is linked to the operating mode of the connected LD device. For example, the 1st LD to connect,
If the 2nd LD and 3rd LD devices are operated independently at the same time, there will be 3 broadcast programs.
Three device addresses (1 to 3) are generated. or,
When three LD devices are used in sequential switching operation, there will be one broadcast program, and the device address will be “1”.
``individual''. In other words, the number of device addresses that this device has differs depending on the operating mode of the connected LD device.

7 is a communication control circuit with the LD devices, which communicates with the three LD devices in an asynchronous, half-duplex manner, and has a data format of "1 start + 8 data + 1 stop" bits. Also, the communication speed is 1200 baud.
The basic protocol (communication protocol) is that this device issues the corresponding command (command given to the computer to perform a task), the LD device executes the command, and the status of execution completion is displayed.
is returned to this device, and the actual command and status are in ASCII (ASCII standard code for information exchange).
Use the character code according to

8, 8', 8'' are the first, second and third communication circuits,
The data transmission/reception signal of the communication control circuit 7 is
A circuit that corresponds to and connects the 1LD, 2nd LD, and 3rd LD devices, connects the microcomputer and each control terminal, and when the signal level is "1", the data transmission/reception signal is connected, and communication with the corresponding LD device is established. is possible.

9 is a ROM in which programs for the following processing are electrically written and stored. "Processing 1" is a program for processing the input signals of the second and third switch circuits, the accompanying manual switches, alarm reset switches, etc., and the output signals of the accompanying LEDs (indicator lights). A communication processing program that is set as "processing 2" and receives operating information from an external timer device and transmits operating information to the external timer device. "Processing 3"
The input signal processing of the first switch circuit and each
It is broadly divided into programs that perform communication processing with the LD device, and is executed by a microcomputer.

Reference numerals 10, 10', and 10'' are first, second, and third relay circuits, which operate in correspondence with the playback operations of the first LD, second LD, and third LD devices.When the output terminal level of the microcomputer is "1", ”, close the contacts and output the video and audio signals input from the video output terminal and audio output terminal of the applicable LD device.

11 is a semiconductor switch (mobile switch),
This is a function to turn on and off the commercial power supply of the LD device by controlling the DC voltage of the control terminal. Sometimes it becomes "in". Further, this is caused when the microcomputer receives an operation start signal of operation information from an external timer device attached thereto.

Reference numeral 12 is a well-known switch having a mechanical locking function, and is a reset switch that normally keeps the contact in the "open" state. During playback, this device always
Communication is performed with the LD device via the operation mode detection means 19. The operation mode detection means 19 detects the current operation mode (DOOR OPEN, PARK,
PLAY, STILL, PAUSE) and is receiving a status signal. At this time, the operation control means 20
If the status signal is not returned after three retries of communication (detection time 3 seconds), or the operation control means 20 sends a play command and the LD
If the corresponding status signal is not returned from the device, the abnormality detection means 21 determines that the corresponding LD device is abnormal and prohibits communication with the corresponding LD device. In this situation, the LD device determined to be abnormal or
After replacing the take board, when restarting the operation again, the switch 12 is set to the "open" state, the level is set to "0", and the prohibition of communication is canceled.

13 and 14 are well-known LED indicator lights, and 13 is an LED that indicates whether the 1st LD, 2nd LD, and 3rd LD devices are currently in the regeneration operation state or in the stopped state. Set the output terminal of the computer to the "1" level and turn on the light. Reference numeral 14 denotes an LED that notifies abnormal operation of the LD device, and when an abnormality occurs, the output terminal of the microcomputer is set to the "1" level and the LED is turned on.

15 is a 1-chip microcomputer, as described above.
The entire system is controlled according to the program stored in the ROM.

"Operation Description" Next, the operation of the automatic switching operation device according to the present invention will be explained. First, connect the 1st LD, 2nd LD, and 3rd LD
A case will be described in which each of the three devices is used independently in repeated operation. When the decimal number of the first switch circuit 1 is specified as "3", the operation mode determining means 16
detects “3” and sends a determination signal to the operation control means 20. Then, manually switch the manual switch 3 that starts the operation to the "close" side, or set the device address number of the third switch circuit 6 (this device is the first device, and set the first number of the three addresses. ) is set to "1" and the operation start and end times are set in accordance with the equipment address number of the attached external timer device. The manual operation of the manual switch 3 starts the operation of the first LD, second LD, and third LD devices all at once, and it is possible to start the operation from an external timer device all at once or for each device address number. In any case, when the communication control means 18 of the microcomputer 15 receives an operation start signal based on any of the operations described above, it drives the semiconductor switch 11 via the operation control means 20 to turn on the commercial power supply of the LD device. "Enter",
The communication control circuit 7 starts communication with the first LD, second LD, and third LD devices via the first, second, and third communication circuits 8, 8', and 8'', and controls the operation control means 20 of the microcomputer. is for three LD devices
A PLAY (playback) command is sent, and the three LD devices begin playback operation approximately 20 seconds after receiving the command. The microcomputer 15 and three LDs
The device constantly communicates with the device via the communication control circuit 7, and the operation mode detection means 19 detects the operation mode of the three LD devices, and when the detection means 19 detects the end of the program (laser disk disc), the operation mode is restarted. The operation control means 20 of the microcomputer has three units.
Send a PLAY command to the LD device to put it into playback mode. This operation is repeated until the manual switch 3 is manually switched to the "open" side, or until the communication control means 18 receives an operation stop signal from the external timer device, and when the manual switch 3 becomes "open". , or when receiving the operation stop signal, if there is an LD device that is still in the middle of playback, the operation control means 20 operates the semiconductor switch 11 after the operation mode detection means 19 detects the end of the program.
Turn off the commercial power to the LD device all at once.

Next, a case of alternate switching operation between two connected first LD and second LD devices will be described. When the decimal number of the first switch circuit is designated as "4", the driving mode determining means 16 determines "4" and sends a determination signal to the driving control means 20. When the communication control means 18 of the microcomputer receives an operation start signal based on the operation of the manual switch 3 or the timer device, the microcomputer and the first LD and second LD devices start communicating via the communication control circuit 7. , the operation control means 20 goes to the first LD device
A PLAY command is sent via the communication control circuit 7. After receiving the command, the first LD device starts the playback operation approximately 20 seconds later, and at the same time, the operation control means 20 of the microcomputer drives the first relay circuit 10 to close the contacts and connect the video and audio output terminals of the first LD device. Outputs the video and audio signals input from. At this time, the second LD device is in a standby state. When the operation mode detection means 19 of the microcomputer detects the end of the program on the first LD device, the operation control means 20 of the microcomputer detects the end of the program on the first LD device.
At the same time as sending out the PLAY command, the first LD device is placed in a standby state. The second LD device that receives the command starts the playback operation approximately 20 seconds later. Further, the operation control means 20 of the microcomputer stops driving the first relay circuit, drives the second relay circuit, and outputs the video and audio signals input from the video and audio output terminals of the second LD device. When the operation mode detection means 19 of the microcomputer detects the end of the program on the second LD device, the operation control means 20 again sends a PLAY command to the first LD device, puts the second LD device in a standby state, and performs automatic alternating switching operation.

Next, a case will be described in which sequential switching operation is performed using three LD devices: the first LD, the second LD, and the third LD. When the decimal number of the first switch circuit is specified as "5", the operation mode discrimination means 16 detects "5", and the operation control means 20
A discrimination signal is sent to the The communication control means 18 of the microcomputer that receives the operation start signal based on the operation of the manual switch 3 or the timer device starts communication with the first LD, second LD, and third LD devices, and the operation control means 20 starts communication with the first LD. to the device
Send the PLAY command. After receiving the command, the first LD device starts playback operation approximately 20 seconds later, and the microcomputer drives the first relay circuit to output video and audio signals from the first LD device. At this time, the second LD and third LD devices remain in a standby state. When the operation mode detection means 19 of the microcomputer detects the end of the program on the first LD device, the operation control means 20 of the microcomputer sends a PLAY command to the second LD device and keeps the first LD and third LD device in a standby state. , when the operation mode detection means 19 detects that the second LD device starts the regeneration operation, the operation control means 20 stops the first relay circuit,
The second relay circuit is driven to output the video and audio input relay signals of the second LD device, and the video and audio signals from the second LD device are output. Furthermore, when the operation mode detection means 19 of the microcomputer detects the end of the program on the second LD device, the operation control means 20 of the microcomputer sends a PLAY command to the third LD device, and puts the first LD and second LD devices in a standby state. shall be. When the third LD device starts the regeneration operation, the operation control means 20 of the microcomputer stops the second relay circuit, drives the third relay circuit, and
Outputs video and audio signals from the 3LD device. This process is repeated to perform automatic sequential switching operation.

Next, the operation when the decimal number of the second switch circuit is designated as "2" in alternate switching operation of the two 2nd LD and 3rd LD devices will be explained. The corresponding number of the second switch circuit 2 is a designation of the same title (in this case, the disks of the second LD and the third LD device are consecutive discs with the same content), and such designation is determined by the title discriminating means 17 and sent to the operation control means 20. Reportedly. In this case, the normal repetitive operation is the same, but a difference occurs when the communication control means 18 receives an operation stop signal from the timer device. for example,
When the communication control means 18 of the microcomputer receives an operation stop signal during the reproduction operation of the second LD device, the operation control means 20 detects the mode of the operation mode detection means 19 without interrupting the program with the same title. Even after the reproduction of the second LD device is finished, the reproduction continues, the third LD device performs the reproduction operation, and after the mode detection means 19 detects the end of the program of the third LD device, the operation control means 20 activates the semiconductor switch 11. Turn off the commercial power to the 2nd LD and 3rd LD devices.

Next, an explanation will be given of the operation when the second LD device generates an abnormality when the three LD devices are sequentially switched. The first LD device finished the playback operation, and the operation control means 20 of the microcomputer sent a PLAY command to the second LD device, but the corresponding status signal was not returned from the second LD device to the operation mode detection means 19, and three times If the corresponding status is not returned despite the retry sending of the PLAY command, the abnormality detection means 21 of the microcomputer determines that the second LD device is abnormal and lights up the abnormality LED 14 to notify. Matatai
After prohibiting communication with the second LD device, the operation control means 20 sends a PLAY command to the third LD device. After that, alternate switching operation between the two units will be performed using the first LD and third LD devices.

Furthermore, if the decimal number of the second switch circuit is specified as "3" in the above condition, it means that the program with the same content is divided into three discs, and the error occurs due to an error in the second LD device. Since continuous viewing of programs is not possible, actions are taken to prohibit further driving.

``Effects'' As described above, by using the automatic switching operation device for the LD device configured as described above, the LD device can be operated independently, alternately operated with two devices, and even with three devices specified by the operation mode discrimination switch. Sequential switching operation can be easily selected, and furthermore, it can be connected to an external timer device, allowing unified time operation management and operation status management.

[Brief explanation of drawings]

FIG. 1 is an electrical block diagram showing an embodiment of the present invention, and FIG. 2 is a block diagram corresponding to the claims of the utility model registration. In the figure, 1 is a first switch circuit, 2 is a second switch circuit, 3 is a manual switch, 4 and 4' are communication terminals, 5 is a communication interface circuit, 6 is a third switch circuit, and 7
8 is a communication control circuit, 8 is a first communication circuit, and 8' is a second communication circuit.
Communication circuit, 8″ is the third communication circuit, 9 is ROM, 1
0 is the first relay circuit, 10' is the second relay circuit,
10″ is the third relay circuit, 11 is the semiconductor switch,
12 is an alarm reset switch, 13 is a playback display LED, 14 is an abnormality display LED, and 15 is a 1-chip microcomputer.

Claims (1)

[Scope of Claim for Utility Model Registration] In an automatic operation switching device capable of connecting at least three laser disc player devices (hereinafter referred to as LD devices), a first operation mode in which each LD device is repeatedly operated independently; An operation mode setting switch that can set a second operation mode in which two of the LD devices are alternately switched and operated, and a third operation mode in which all LD devices are sequentially switched and operated, and settings using the above setting switch. an operation mode discriminating means for discriminating each operation mode that has been selected;
a communication control means for controlling the movement and stopping of the operation of the LD device; and a communication control means for generating a regeneration or stop command signal according to the operation mode based on the operation mode determined by the discrimination means, and a signal from the communication control means. an operation control means that generates a maneuver or stop signal based on the operation control means, and receives a regeneration or stop command signal from the operation control means and transmits it to each of the above-mentioned LD devices, and when each LD device is in operation, receives a signal from each LD device. A communication control circuit that receives status signals and constantly communicates with each LD device, and a communication control circuit that receives status signals from the communication control circuit and communicates with each LD device at all times.
an operation mode detection means for detecting the operation mode of the LD device and sending an operation mode signal corresponding to the operation mode to the operation control means; and operation of each LD device based on the operation or stop signal from the operation control means. and a mobile switch for stopping the LD device, and the operation control means controls regeneration and stop of each LD device in any of the operation modes selected by the setting switch, and controls the LD device to operate in the first mode.
An automatic operation switching device for a laser disc player, characterized in that the device can perform playback in any one of the above-mentioned operation modes.