Patents by Inventor Zhaoxiang Chen
Zhaoxiang Chen 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).
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Patent number: 7761004Abstract: A fully charged battery or an unused battery is set in a battery box of a lighting apparatus. A user turns on an illumination electric source of the apparatus and selects the battery. A maximum number of lighting times Smax when the lighting apparatus causes manual full lighting M1/1 by using the selected battery is stored in a memory of a microcomputer or IC by a user according to an operating button or an instruction on a liquid crystal screen. Next, the user performs normal shooting. A lighting amount (TTL lighting, manual full lighting, or the like) when the user performs shooting is converted to manual full lighting M1/1 to be obtained as a number of lighting times. By comparing the obtained number of lighting times with the maximum number of lighting times Smax, how many times of lighting can still be performed at a maximum is calculated.Type: GrantFiled: October 1, 2008Date of Patent: July 20, 2010Assignee: Nikon CorporationInventors: Naoto Yamada, Hideki Matsui, Zhaoxiang Chen
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Patent number: 7606480Abstract: A photographic illuminating device comprises a discharge-controlled illumination unit that emits illuminating light in response to a light emission instruction, a current-controlled illumination unit that emits illuminating light in response to a light emission instruction, a high voltage circuit that generates a high voltage needed for discharge light emission at the discharge-controlled illumination unit and a current control circuit that supplies to the current-controlled illumination unit a current needed for light emission at the current-controlled illumination unit by using the high voltage generated at the high voltage circuit.Type: GrantFiled: October 13, 2005Date of Patent: October 20, 2009Assignee: Nikon CorporationInventor: Zhaoxiang Chen
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Publication number: 20090074397Abstract: A fully charged battery or an unused battery is set in a battery box of a lighting apparatus. A user turns on an illumination electric source of the apparatus and selects the battery. A maximum number of lighting times Smax when the lighting apparatus causes manual full lighting M1/1 by using the selected battery is stored in a memory of a microcomputer or IC by a user according to an operating button or an instruction on a liquid crystal screen. Next, the user performs normal shooting. A lighting amount (TTL lighting, manual full lighting, or the like) when the user performs shooting is converted to manual full lighting M1/1 to be obtained as a number of lighting times. By comparing the obtained number of lighting times with the maximum number of lighting times Smax, how many times of lighting can still be performed at a maximum is calculated.Type: ApplicationFiled: October 1, 2008Publication date: March 19, 2009Applicant: NIKON CORPORATIONInventors: Naoto Yamada, Hideki Matsui, Zhaoxiang Chen
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Publication number: 20060087253Abstract: A photographic illuminating device comprises a discharge-controlled illumination unit that emits illuminating light in response to a light emission instruction, a current-controlled illumination unit that emits illuminating light in response to a light emission instruction, a high voltage circuit that generates a high voltage needed for discharge light emission at the discharge-controlled illumination unit and a current control circuit that supplies to the current-controlled illumination unit a current needed for light emission at the current-controlled illumination unit by using the high voltage generated at the high voltage circuit.Type: ApplicationFiled: October 13, 2005Publication date: April 27, 2006Applicant: Nikon CorporationInventor: Zhaoxiang Chen
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Patent number: 6654558Abstract: An electric flash according to the present invention comprises a flash source for emitting flash light to illuminate a subject, a trigger noise detecting part for detecting trigger noise generated from a master-side flash, and a flash control part for controlling the flashing of the flash source in synchronization with the trigger noise detected by the trigger noise detecting part. By detecting the trigger noise generated at the flashing or the like of the master-side flash which is arranged close thereto, the electric flash carries out a slave flash in synchronization with the flash timing of the master-side flash.Type: GrantFiled: August 6, 2001Date of Patent: November 25, 2003Assignee: Nikon CorporationInventors: Zhaoxiang Chen, Nobuyoshi Hagiuda
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Patent number: 6614999Abstract: A dimming plate for dimming light from an internal flash device of a camera, is disposed on the external flash device of the present invention which is mounted for use on a mounting seat of the camera. A two-lamp-lighting photographing is carried out in a state where the light from the internal flash device of the camera is dimmed by covering a luminescent unit of the internal flash device with the dimming plate of the external flash device. Thereby the two-lamp-lighting photographing can be carried out easily and reliably, where the light emission of the external flash device is used as a main light source, and the light emission of the internal flash device of the camera as a supplementary light source. The external flash device becomes inexpensive because the two-lamp-lighting photographing can be carried out only by incorporating the dimming plate therein without a special sub-luminescent unit disposed.Type: GrantFiled: September 10, 2001Date of Patent: September 2, 2003Assignee: Nikon CorporationInventors: Nobuyoshi Hagiuda, Hideki Matsui, Zhaoxiang Chen
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Patent number: 6556790Abstract: An electronic flash device includes: a flash light emission circuit that performs a flash light emission; a light emission control circuit that supplies power for light emission to the flash light emission circuit in response to an input of a light emission start signal and cuts off the power to the flash light emission circuit in response to an input of a light emission stop signal; and a protective circuit that detects a state that will induce power supply to the flash light emission circuit in response to an anomalous signal based upon a circuit operation of the light emission control circuit and prevents the power supply to the flash light emission circuit.Type: GrantFiled: January 30, 2002Date of Patent: April 29, 2003Assignee: Nikon CorporationInventors: Hideki Matsui, Zhaoxiang Chen
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Publication number: 20030039475Abstract: An electronic flash device includes: a flash light emission circuit that performs a flash light emission; a light emission control circuit that supplies power for light emission to the flash light emission circuit in response to an input of a light emission start signal and cuts off the power to the flash light emission circuit in response to an input of a light emission stop signal; and a protective circuit that detects a state that will induce power supply to the flash light emission circuit in response to an anomalous signal based upon a circuit operation of the light emission control circuit and prevents the power supply to the flash light emission circuit.Type: ApplicationFiled: January 30, 2002Publication date: February 27, 2003Applicant: NIKON CORPORATIONInventors: Hideki Matsui, Zhaoxiang Chen
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Publication number: 20020039490Abstract: A dimming plate for dimming light from an internal flash device of a camera, is disposed on the external flash device of the present invention which is mounted for use on a mounting seat of the camera. A two-lamp-lighting photographing is carried out in a state where the light from the internal flash device of the camera is dimmed by covering a luminescent unit of the internal flash device with the dimming plate of the external flash device. Thereby the two-lamp-lighting photographing can be carried out easily and reliably, where the light emission of the external flash device is used as a main light source, and the light emission of the internal flash device of the camera as a supplementary light source. The external flash device becomes inexpensive because the two-lamp-lighting photographing can be carried out only by incorporating the dimming plate therein without a special sub-luminescent unit disposed.Type: ApplicationFiled: September 10, 2001Publication date: April 4, 2002Applicant: NIKON CORPORATIONInventors: Nobuyoshi Hagiuda, Hideki Matsui, Zhaoxiang Chen
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Publication number: 20020015590Abstract: An electric flash according to the present invention comprises a flash source for emitting flash light to illuminate a subject, a trigger noise detecting part for detecting trigger noise generated from a master-side flash, and a flash control part for controlling the flashing of the flash source in synchronization with the trigger noise detected by the trigger noise detecting part. By detecting the trigger noise generated at the flashing or the like of the master-side flash which is arranged close thereto, the electric flash carries out a slave flash in synchronization with the flash timing of the master-side flash.Type: ApplicationFiled: August 6, 2001Publication date: February 7, 2002Applicant: NIKON CORPORATIONInventors: Zhaoxiang Chen, Nobuyoshi Hagiuda