Patents by Inventor Tsuneyuki Nozawa
Tsuneyuki Nozawa 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: 7336322Abstract: An image display apparatus includes a second converging unit constructed so that a light flux from part of a first light source or from a separately provided second light source is converged to have a line shape, a spectroscope/deflector unit constructed so that his line-shape light flux is irradiated on a region of the display device different from the region on which a strip-shape light flux from a first converging unit is irradiated, and an image processing unit constructed to control so that the pixels of the region of the display device on which the line-shape light flux is irradiated is turned on and off in accordance with image data being displayed.Type: GrantFiled: February 24, 2005Date of Patent: February 26, 2008Assignee: Hitachi, Ltd.Inventors: Tomoki Kobori, Satoshi Ouchi, Tsuneyuki Nozawa
-
Patent number: 7284864Abstract: There is provided a safe image display apparatus for projecting an image on a screen that can minimize a stimulus to eyes, retinae and optic nerves from projected light entering into the eyes directly. By comparing a displayed image captured by a camera with an input image signal, a changed area is detected as a difference area and, then, a projected image signal is generated wherein a picture area image signal in the input image signal that corresponds to this difference area is masked by a black signal. The obtained projected image signal is projected onto the screen.Type: GrantFiled: January 3, 2007Date of Patent: October 23, 2007Assignee: Hitachi, Ltd.Inventors: Tomoki Kobori, Fumio Haruna, Tsuneyuki Nozawa
-
Publication number: 20070109500Abstract: There is provided a safe image display apparatus for projecting an image on a screen that can minimize a stimulus to eyes, retinae and optic nerves from projected light entering into the eyes directly. By comparing a displayed image captured by a camera with an input image signal, a changed area is detected as a difference area and, then, a projected image signal is generated wherein a picture area image signal in the input image signal that corresponds to this difference area is masked by a black signal. The obtained projected image signal is projected onto the screen.Type: ApplicationFiled: January 3, 2007Publication date: May 17, 2007Applicant: HITACHI, LTD.Inventors: Tomoki Kobori, Fumio Haruna, Tsuneyuki Nozawa
-
Patent number: 7165844Abstract: There is provided a safe image display apparatus for projecting an image on a screen that can minimize a stimulus to eyes, retinae and optic nerves from projected light entering into the eyes directly. By comparing a displayed image captured by a camera with an input image signal, a changed area is detected as a difference area and, then, a projected image signal is generated wherein a picture area image signal in the input image signal that corresponds to this difference area is masked by a black signal. The obtained projected image signal is projected onto the screen.Type: GrantFiled: July 24, 2006Date of Patent: January 23, 2007Assignee: Hitachi, Ltd.Inventors: Tomoki Kobori, Fumio Haruna, Tsuneyuki Nozawa
-
Publication number: 20060256294Abstract: There is provided a safe image display apparatus for projecting an image on a screen that can minimize a stimulus to eyes, retinae and optic nerves from projected light entering into the eyes directly. By comparing a displayed image captured by a camera with an input image signal, a changed area is detected as a difference area and, then, a projected image signal is generated wherein a picture area image signal in the input image signal that corresponds to this difference area is masked by a black signal. The obtained projected image signal is projected onto the screen.Type: ApplicationFiled: July 24, 2006Publication date: November 16, 2006Applicant: HITACHI, LTD.Inventors: Tomoki Kobori, Fumio Haruna, Tsuneyuki Nozawa
-
Patent number: 7092045Abstract: In measuring the angle of inclination of a liquid crystal projector with respect to the screen for automatically adjusting a trapezoidal distortion, the calculation of the angle of inclination by determining the distance from the screen using a distance sensor conventionally requires a high distance measurement accuracy and hence an expensive distance sensor. According to the invention, a distance sensor is rotated and the level of the wave reflected from it is observed. The angle of inclination with respect to the screen is detected from the rotational angle associated with the maximum value of the level of the reflected wave thereby to correct the trapezoidal distortion. In this way, the trapezoidal distortion can be adjusted automatically using an inexpensive distance sensor.Type: GrantFiled: February 10, 2003Date of Patent: August 15, 2006Assignee: Hitachi, Ltd.Inventors: Fumio Haruna, Tsuneyuki Nozawa, Atsushi Shigeta
-
Patent number: 7090352Abstract: There is provided a safe image display apparatus for projecting an image on a screen that can minimize a stimulus to eyes, retinae and optic nerves from projected light entering into the eyes directly. By comparing a displayed image captured by a camera with an input image signal, a changed area is detected as a difference area and, then, a projected image signal is generated wherein a picture area image signal in the input image signal that corresponds to this difference area is masked by a black signal. The obtained projected image signal is projected onto the screen.Type: GrantFiled: September 6, 2005Date of Patent: August 15, 2006Assignee: Hitachi, Ltd.Inventors: Tomoki Kobori, Fumio Haruna, Tsuneyuki Nozawa
-
Publication number: 20060001836Abstract: There is provided a safe image display apparatus for projecting an image on a screen that can minimize a stimulus to eyes, retinae and optic nerves from projected light entering into the eyes directly. By comparing a displayed image captured by a camera with an input image signal, a changed area is detected as a difference area and, then, a projected image signal is generated wherein a picture area image signal in the input image signal that corresponds to this difference area is masked by a black signal. The obtained projected image signal is projected onto the screen.Type: ApplicationFiled: September 6, 2005Publication date: January 5, 2006Applicant: HITACHI, LTD.Inventors: Tomoki Kobori, Fumio Haruna, Tsuneyuki Nozawa
-
Publication number: 20050231650Abstract: An image display apparatus includes a second converging unit constructed so that a light flux from part of a first light source or from a separately provided second light source is converged to have a line shape, a spectroscope/deflector unit constructed so that his line-shape light flux is irradiated on a region of the display device different from the region on which a strip-shape light flux from a first converging unit is irradiated, and an image processing unit constructed to control so that the pixels of the region of the display device on which the line-shape light flux is irradiated is turned on and off in accordance with image data being displayed.Type: ApplicationFiled: February 24, 2005Publication date: October 20, 2005Inventors: Tomoki Kobori, Satoshi Ouchi, Tsuneyuki Nozawa
-
Patent number: 6945653Abstract: There is provided a safe image display apparatus for projecting an image on a screen that can minimize a stimulus to eyes, retinae and optic nerves from projected light entering into the eyes directly. By comparing a displayed image captured by a camera with an input image signal, a changed area is detected as a difference area and, then, a projected image signal is generated wherein a picture area image signal in the input image signal that corresponds to this difference area is masked by a black signal. The obtained projected image signal is projected onto the screen.Type: GrantFiled: July 15, 2003Date of Patent: September 20, 2005Assignee: Hitachi, Ltd.Inventors: Tomoki Kobori, Fumio Haruna, Tsuneyuki Nozawa
-
Publication number: 20050094823Abstract: A low-cost and highly accurate active noise controller provides for low acoustic noise in a projector that makes produces highlight radiance and has a small size. The rotation frequency of a fan used for cooling the apparatus is measured by a rotation speed detector attached to the fan, a base frequency of acoustic noise and its multiple frequencies are calculated from the number of vanes provided on each fan, and target frequencies at which the acoustic noise is actively controlled are specified. An acoustic noise state is taken in from a microphone, a noise level is specified at each specified target frequency, the amplitude of an antiphase wave, that relates to the frequency characteristics of a microphone, a speaker and the inside of the active noise controller (or the projector), is roughly determined, and then a generated wave is emitted from the speaker. Further, for each target frequency, phase compensation is repeated in a time sequential manner, whereby the noise level is minimized.Type: ApplicationFiled: April 15, 2004Publication date: May 5, 2005Inventors: Tomoki Kobori, Fumio Haruna, Tsuneyuki Nozawa
-
Publication number: 20040165154Abstract: There is provided a safe image display apparatus for projecting an image on a screen that can minimize a stimulus to eyes, retinae and optic nerves from projected light entering into the eyes directly. By comparing a displayed image captured by a camera with an input image signal, a changed area is detected as a difference area and, then, a projected image signal is generated wherein a picture area image signal in the input image signal that corresponds to this difference area is masked by a black signal. The obtained projected image signal is projected onto the screen.Type: ApplicationFiled: July 15, 2003Publication date: August 26, 2004Applicant: HITACHI, LTD.Inventors: Tomoki Kobori, Fumio Haruna, Tsuneyuki Nozawa
-
Publication number: 20040070694Abstract: In measuring the angle of inclination of a liquid crystal projector with respect to the screen for automatically adjusting a trapezoidal distortion, the calculation of the angle of inclination by determining the distance from the screen using a distance sensor conventionally requires a high distance measurement accuracy and hence an expensive distance sensor. According to the invention, a distance sensor is rotated and the level of the wave reflected from it is observed. The angle of inclination with respect to the screen is detected from the rotational angle associated with the maximum value of the level of the reflected wave thereby to correct the trapezoidal distortion. In this way, the trapezoidal distortion can be adjusted automatically using an inexpensive distance sensor.Type: ApplicationFiled: February 10, 2003Publication date: April 15, 2004Inventors: Fumio Haruna, Tsuneyuki Nozawa, Atsushi Shigeta