Patents by Inventor Hiroko Tsujiguchi
Hiroko Tsujiguchi has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
-
Patent number: 10423477Abstract: A control apparatus connected to a device includes a first control unit configured to execute a program, a second control unit configured to access the device to control the device, and a third control unit configured to control a reset of the control apparatus by transmitting a watchdog reset signal to the first and the second control units. When a condition for triggering a watchdog reset is satisfied, the third control unit transmits a watchdog reset prior notification to the second control unit before transmitting the watchdog reset signal. Upon reception of the watchdog reset signal, the first control unit executes a watchdog reset on the control apparatus. When a watchdog reset is executed, the second control unit controls the device to perform processing for making the device ready to accept a command based on information acquired upon reception of the watchdog reset prior notification.Type: GrantFiled: June 1, 2017Date of Patent: September 24, 2019Assignee: CANON KABUSHIKI KAISHAInventor: Hiroko Tsujiguchi
-
Publication number: 20170351564Abstract: A control apparatus connected to a device includes a first control unit configured to execute a program, a second control unit configured to access the device to control the device, and a third control unit configured to control a reset of the control apparatus by transmitting a watchdog reset signal to the first and the second control units. When a condition for triggering a watchdog reset is satisfied, the third control unit transmits a watchdog reset prior notification to the second control unit before transmitting the watchdog reset signal. Upon reception of the watchdog reset signal, the first control unit executes a watchdog reset on the control apparatus. When a watchdog reset is executed, the second control unit controls the device to perform processing for making the device ready to accept a command based on information acquired upon reception of the watchdog reset prior notification.Type: ApplicationFiled: June 1, 2017Publication date: December 7, 2017Inventor: Hiroko Tsujiguchi
-
Patent number: 8736888Abstract: A printing apparatus which prints by scanning a printhead in two directions based on raster data containing multi-valued data, sequentially stores multi-valued data contained in each raster data in a print buffer in correspondence with a predetermined direction of the two directions, acquires for each raster data, identification information corresponding to the multi-valued data stored in the print buffer first and identification information corresponding to the multi-valued data stored in the print buffer lastly for each tone value based on initial values of identification information and the number of multi-valued data contained in each raster data, generates bitmap data from the multi-valued data using pattern data read out based on identification information selected based on a scanning direction of the printhead, and controls printing of the printhead based on the generated bitmap data.Type: GrantFiled: September 14, 2012Date of Patent: May 27, 2014Assignee: Canon Kabushiki KaishaInventors: Hiroko Tsujiguchi, Hideki Nakanishi, Hiroshi Uemura
-
Publication number: 20130016369Abstract: A printing apparatus which prints by scanning a printhead in two directions based on raster data containing multi-valued data, sequentially stores multi-valued data contained in each raster data in a print buffer in correspondence with a predetermined direction of the two directions, acquires for each raster data, identification information corresponding to the multi-valued data stored in the print buffer first and identification information corresponding to the multi-valued data stored in the print buffer lastly for each tone value based on initial values of identification information and the number of multi-valued data contained in each raster data, generates bitmap data from the multi-valued data using pattern data read out based on identification information selected based on a scanning direction of the printhead, and controls printing of the printhead based on the generated bitmap data.Type: ApplicationFiled: September 14, 2012Publication date: January 17, 2013Applicant: CANON KABUSHIKI KAISHAInventors: Hiroko Tsujiguchi, Hideki Nakanishi, Hiroshi Uemura
-
Patent number: 8289559Abstract: A printing apparatus which prints by scanning a printhead in two directions based on raster data containing multi-valued data, sequentially stores multi-valued data contained in each raster data in a print buffer in correspondence with a predetermined direction of the two directions, acquires for each raster data, identification information corresponding to the multi-valued data stored in the print buffer first and identification information corresponding to the multi-valued data stored in the print buffer lastly for each tone value based on initial values of identification information and the number of multi-valued data contained in each raster data, generates bitmap data from the multi-valued data using pattern data read out based on identification information selected based on a scanning direction of the printhead, and controls printing of the printhead based on the generated bitmap data.Type: GrantFiled: February 18, 2010Date of Patent: October 16, 2012Assignee: Canon Kabushiki KaishaInventors: Hiroko Tsujiguchi, Hideki Nakanishi, Hiroshi Uemura
-
Publication number: 20100214613Abstract: A printing apparatus which prints by scanning a printhead in two directions based on raster data containing multi-valued data, sequentially stores multi-valued data contained in each raster data in a print buffer in correspondence with a predetermined direction of the two directions, acquires for each raster data, identification information corresponding to the multi-valued data stored in the print buffer first and identification information corresponding to the multi-valued data stored in the print buffer lastly for each tone value based on initial values of identification information and the number of multi-valued data contained in each raster data, generates bitmap data from the multi-valued data using pattern data read out based on identification information selected based on a scanning direction of the printhead, and controls printing of the printhead based on the generated bitmap data.Type: ApplicationFiled: February 18, 2010Publication date: August 26, 2010Applicant: CANON KABUSHIKI KAISHAInventors: Hiroko Tsujiguchi, Hideki Nakanishi, Hiroshi Uemura
-
Publication number: 20050285871Abstract: An image-processing circuit includes a memory including a data table for a plurality of calculations; a central processing unit executing the calculations; and a memory controller controlling read of data from the data table upon instruction from the central processing unit. The memory controller includes address registers holding a predetermined number of addresses read from the data table for use in a single calculation; data registers corresponding to the address registers and holding data corresponding to the addresses in the address registers; a determination unit determining, with respect to each of the predetermined number of addresses, whether the address for a previous calculation and an address instructed from the central processing unit for a present calculation are the same as each other; and a control unit, when the address for the present calculation is the same as the previous address, reading data from the data register.Type: ApplicationFiled: June 21, 2005Publication date: December 29, 2005Applicant: Canon Kabushiki KaishaInventor: Hiroko Tsujiguchi