Interface of a monitor communicating with personal computer

Claim 2

A monitor system comprising: a monitor having a microcomputer connected via a communication interface with a personal computer (PC), the interface being connected to a printer port of the PC for providing a serial clock and serial data to the printer port of the PC, and the interface being connected to a communication COM port of the PC for serial transmission of data whereby data is written in or read out from the microcomputer through the interface; wherein the interface includes selection means for selecting one of the communication ports.

Claim 3

The monitor system as claimed in claim 1 , further comprising: a display port of the monitor connected to a display port of the PC and operable to receive display information from the PC for display on the monitor and a switch connected to display ports for controlling the writing of data.

Claim 4

A system as defined in claim 1 , wherein said system includes circuitry for transmitting output signals from the PC to the microcomputer while the printer port is in use.

Claim 5

A monitor interface for connecting a monitor having a microcomputer for communications with a personal computer (PC), the interface including: a connector connectable to a printer port of the PC for providing a serial clock and serial data to the printer port of the PC, and the interface including a connector connectable to a communication COM port of the PC for serial transmission of data, whereby data is stored in or read out from the microcomputer through the interface; and a switch for switching communications between the printer port of the PC and the COM port of the PC.

Claim 6

A monitor interface for connecting a monitor having a microcomputer for communications with a personal computer (PC), the interface including: a connector connectable to a printer port of the PC for providing a serial clock and serial data to the printer port of the PC, and the interface including a connector connectable to a communication COM port of the PC for serial transmission of data, whereby data is stored in or read out from the microcomputer through the interface; and a switch for switching communications between the printer port of the PC and the COM port of the PC.

Claim 7

The monitor interface as claimed in claim 4 , further comprising: selected means for selecting one of the ocmmunication ports.

Claim 8

The monitor interface as claimed in claim 4 , further comprising: a display port of the monitor connectable to a display port of the PC and operable to receive display information from the PC for display on the monitor, and a switch connected to display port for controlling the writing of data.

Claim 9

A system as defined in claim 4 , wherein said system includes circuitry for transmitting output signals from the PC to the microcomputer while the printer port is in use.

Claim 10

A monitor system comprising: a monitor having a microcomputer connected via a communication interface with a personal computer (PC), the interface being connected to a printer port of the PC for providing a serial clock and serial data to the printer port of the PC, and the interface being connected to a communication COM port of the PC for serial transmission of data whereby data is written in or read out from the microcomputer through the interface; wherein the interface includes selection means for selecting one of the communication ports through a keyboard provided with the PC; a D-sub connector and a switch, connected between the COM port and the D-sub connector, for switch-controlling the data communication lines to effect a serial communication through the COM port, and a transistor, connected to a serial data signal from the D-sub connector, for providing an interrupt switching signal to the microcomputer when serial communication is effected.

Claim 11

A monitor system comprising: a monitor having a microcomputer connected via a communication interface with a personal computer (PC), the interface being connected to a printer port of the PC for providing a serial clock and serial data to the printer port of the PC, and the interface being connected to a communication COM port of the PC for serial transmission of data whereby data is written in or read out from the microcomputer through the interface; wherein the interface includes selection means for selecting one of the communication ports through a keyboard provided with the PC; a D-sub connector and a switch, connected between the COM port and the D-sub connector, for switch-controlling the data communication lines to effect a serial communication through the COM port, and a transistor, connected to a serial data signal from the D-sub connector, for providing an interrupt switching signal to the microcomputer when serial communication is effected.

Claim 12

A monitor interface for connecting a monitor having a microcomputer for communications with a personal computer (PC), the interface including: a connector connectable to a printer port of the PC for providing a serial clock and serial data to the printer port of the PC, and the interface including a connector connectable to a communication COM port of the PC for serial transmission of data, whereby data is stored in or read out from the microcomputer through the interface; a switch for switching communications between the printer port of the PC and the COM port of the PC; a D-sub connector and a switch, connected between said communication port and the D-sub connector, for switch-controlling the communication lines to effect a serial communication through the COM port; and a transistor, connected to one side of the D-sub connector, for providing an interrupt switching signal to the microcomputer when serial communication is effected.

Claim 13

A monitor interface for connecting a monitor having a microcomputer for communications with a personal computer (PC), the interface including: a connector connectable to a printer port of the PC for providing a serial clock and serial data to the printer port of the PC, and the interface including a connector connectable to a communication COM port of the PC for serial transmission of data, whereby data is stored in or read out from the microcomputer through the interface; a switch for switching communications between the printer port of the PC and the COM port of the PC; a D-sub connector and a switch, connected between said communication port and the D-sub connector, for switch-controlling the communication lines to effect a serial communication through the COM port; and a transistor, connected to one side of the D-sub connector, for providing an interrupt switching signal to the microcomputer when serial communication is effected.