US 5,854,885 A · Terminal apparatus

Abstract

In a circuit formed with a resistor 32, connection terminals 28 and 23, a resistor 25, and connection terminals 24 and 29 all of which are shown in FIG. 3, when a one-chip microcomputer 21 shown in FIG. 1 inputs a high-level SCAN signal, a high- or low-level SENSE signal is generated according to the mounting state of an ink cartridge 33. When the ink cartridge 33 is mounted, a low-level SENSE signal is generated in response to a high-level SCAN signal. When the ink cartridge 33 is not mounted, a high-level SENSE signal is generated in response to a high-level SCAN signal. The one-chip microcomputer 21 monitors the mounting state of the ink cartridge 33 by detecting the level of a SENSE signal in order to prevent unnecessary initialization operations for the head of the ink cartridge so as not to reduce the number of sheets available for recording and not to increase running costs.

Claims24

Dependent claims

A terminal apparatus having at least one section, comprising:

a main power unit for supplying power to the at least one section of said apparatus;
an auxiliary power unit for supplying power to the at least one section of said apparatus;
storage means for storing information with the use of power supplied by at least one of said main power unit and said auxiliary power unit;
recording means provided with a detachable cartridge;
power supply control means for controlling said main power unit to supply power to said storage means in a normal operating state in which said main power unit operates, and for controlling said auxiliary power unit to supply power to said storage means in a backup operating state when said main power unit stops its operation;
monitoring means for monitoring a mounting state of the cartridge in the backup operating state in which said main power unit stops operating and said auxiliary power unit supplies power to said storage means, thereby generating information concerning the mounting state of the cartridge and whether the cartridge is changed;
and
central control means for receiving the information concerning the mounting state of the cartridge and whether the cartridge is changed and for controlling said recording means in accordance with the received information and an operating state, wherein said central control means receives said information concerning the mounting state of the cartridge and whether the cartridge is changed after the backup operating state is terminated.

5 more elements

A terminal apparatus having at least one section, comprising:

a main power unit for supplying power to the at least one section of said apparatus;
an auxiliary power unit for supplying power to the at least one section of said apparatus;
storage means for storing information with the use of power supplied by at least one of said main power unit and said auxiliary power unit;
recording means provided with a detachable cartridge;
power supply control means for controlling said main power unit to supply power to said storage means in a normal operating state in which said main power unit operates, and for controlling said auxiliary power unit to supply power to said storage means in a backup operating state when said main power unit stops its operation;
monitoring means for monitoring a mounting state of the cartridge in the backup operating state in which said main power unit stops operating and said auxiliary power unit supplies power to said storage means, and for generating information concerning the mounting state of the cartridge;
and
central control means for receiving the information concerning the mounting state of the cartridge and for controlling said recording means in accordance with the received information and an operating state, wherein said recording means comprises an ink-jet recording unit and, when said backup state converts to said normal operating state, said monitoring means outputs the information concerning the mounting state of said cartridge at the state conversion and the information concerning whether said cartridge was changed during said backup state to said central control means, and said central control means controls execution of a head recovery operation for said cartridge in said recording means according to the information concerning the mounting state of said cartridge and the information concerning whether said cartridge was changed during said backup state.

5 more elements

Dependencies are inferred from the claim text.

Terminal apparatus

Life of this patent

Terminal apparatus

Life of this patent

Abstract

Claims24