Patents by Inventor Yoshihiro Maeda
Yoshihiro Maeda 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: 8154474Abstract: The present invention provides a spatial light modulator, comprising: a plurality of pixel elements wherein each of the pixel elements comprises at least a switching element; a plurality of control lines connected to at least one of the switching elements; and a controller for generating and transmitting a control signal through the control line for controlling the switching element, wherein the controller starts transmitting the control signal to a first switching element through a first control line before the control signal applied to a second switching element through a second control line is turned off at a low voltage level.Type: GrantFiled: March 25, 2009Date of Patent: April 10, 2012Assignees: Silicon Quest Kabushiki Kaisha, Olympus CorporationInventors: Fusao Ishii, Naoya Sugimoto, Yoshihiro Maeda
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Patent number: 8134772Abstract: A micromirror device includes an elastic hinge for supporting a mirror on a substrate, and an address electrode for deflecting the mirror. The device further includes a protective layer and an oriented monolayer laid to cover a stopper also functioning as an address electrode provided below the mirror and between the mirror and the substrate.Type: GrantFiled: May 2, 2008Date of Patent: March 13, 2012Assignees: Silicon Quest Kabushiki-Kaisha, Olympus CorporationInventors: Yoshihiro Maeda, Fusao Ishii, Kazuhiro Watanabe, Hirotoshi Ichikawa
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Patent number: 8134767Abstract: A mirror device comprises: an electrode which is covered with a protective film made of a material containing a semiconductor material and is placed on a substrate; a mirror placed above the electrode; and an electrically conductive hinge placed between the mirror and the electrode, wherein an opening part is formed in a part of the protective film, and the hinge penetrates the protective film in the opening part thereof.Type: GrantFiled: January 22, 2010Date of Patent: March 13, 2012Assignees: Silicon Quest Kabushiki-Kaisha, Olympus CorporationInventors: Yoshihiro Maeda, Hirotoshi Ichikawa, Fusao Ishii
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Patent number: 8125407Abstract: A micromirror device, which makes an image display with digital image data, comprises pixel elements which are arranged in the form of a matrix and each of which modulates incident light by using an ON state for deflecting incident light to projection optics, an OFF state for deflecting incident light to a direction different from the projection optics, and an oscillation state where a mirror oscillates between the ON and the OFF state, and a timing controller for performing a timing control for loading the image data into the pixel elements arranged in the form of the matrix. Each of the pixel elements has a mirror, and at least one memory cell. The pixel elements arranged in the form of the matrix are grouped into a plurality of subsets. The timing controller performs a timing control for loading the image data at independent timing for each of the plurality of subsets.Type: GrantFiled: December 26, 2007Date of Patent: February 28, 2012Assignees: Silicon Quest Kabushiki-Kaisha, Olympus CorporationInventors: Kazuma Aral, Fusao Ishii, Yoshihiro Maeda
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Patent number: 8115986Abstract: The present invention provides a mirror device, comprising: a plurality of deflectable mirrors; an elastic member for supporting the mirror and to deflect the mirror to a range of deflecting angles; a drive electrode for driving the mirror; a control circuit for giving electric charge to the drive electrode and controlling the deflecting direction of the mirror; and a substrate on which the drive electrode and the elastic member, wherein the drive electrode is placed within an area on the substrate the mirror is projected on, has an outer form constituted by sides approximately in parallel to the outer peripheral lines of the present mirror and by sides approximately parallel to the deflection axis of the present mirror, or a form obtained by dividing the aforementioned outer form into a plurality thereof, and also fills the role of a stopper for regulating the deflection angle of the mirror.Type: GrantFiled: September 4, 2008Date of Patent: February 14, 2012Assignees: Silicon Quest Kabushiki-Kaisha, Olympus CorporationInventors: Hirotoshi Ichikawa, Yoshihiro Maeda, Fusao Ishii
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Patent number: 8081371Abstract: The present invention provides an image projection system comprising a spatial light modulator (SLM) comprises a plurality of pixel elements, wherein each of the pixel elements further comprises a deflectable mirror, and at least a first electrode and a second electrode for controlling the deflectable mirror to deflect to different tilt angles to reflect and modulate an illumination light for displaying an image; and a controller for applying a voltage to the second electrode wherein the voltage applied in an initial operation period is different from the voltage applied in an image display period.Type: GrantFiled: September 18, 2009Date of Patent: December 20, 2011Assignees: Silicon Quest Kabushiki-Kaisha, Olympus CorporationInventors: Naoya Sugimoto, Yoshihiro Maeda, Fusao Ishii
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Patent number: 8064118Abstract: This invention provides a display system that receives an image signal containing a binary data of N bits, wherein N is a positive integer, for displaying an image with a grayscale corresponding to the binary data. The display system further includes a data converter for converting M-bit of the N bits of the binary data into a non-binary data, wherein M is a positive integer and N?M, for applying the non-binary data as a sub-frame in controlling the gray scale in displaying the image. In an exemplary embodiment, the data converter converts consecutive M-bit of the N bits of the binary data into the non-binary data. The display system further includes a spatial light modulator (SLM) having a plurality of pixel elements and the SLM receiving the non-binary data of M bits for controlling the pixel elements.Type: GrantFiled: July 26, 2007Date of Patent: November 22, 2011Assignees: Silicon Quest Kabushiki-Kaisha, Olympus CorporationInventors: Fusao Ishii, Yoshihiro Maeda, Hirotoshi Ichikawa, Kazuma Arai
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Patent number: 8064123Abstract: The present invention provides an image display system implemented with a micro-electromechanical system (MEMS) device formed and supported on a substrate functioning as a spatial light modulator wherein the MEMS device further comprises a drive circuit disposed on the substrate; a micromirror functioning as a movable electrode supported on a deflectable hinge extended from the substrate; a stationary electrode disposed on the substrate and connected to the drive circuit to receive signals therefrom, wherein the stationary electrode comprises a first electrode, a second electrode and an insulation layer, wherein the insulation layer is disposed between the first electrode and second electrode.Type: GrantFiled: October 30, 2009Date of Patent: November 22, 2011Assignees: Silicon Quest Kabushiki-Kaisha, Olympus CorporationInventors: Yoshihiro Maeda, Hirotoshi Ichikawa, Naoya Sugimoto, Fusao Ishii
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Patent number: 8064125Abstract: The present invention provides a display apparatus, comprising: a light source or light sources for emitting a luminous flux or luminous fluxes having a plurality of colors; a spatial light modulator for modulating the luminous flux(es) having a plurality of colors incoming from the light sources; and controller for processing video image input data, which is input, and controlling the light source(s) and the spatial light modulator, wherein the controller generates a plurality of video image signals of colors constituting a video image based on the video image input data, and controls the light source(s) so as to cause the light source(s) having at least two colors, from among the light source(s) having a plurality of colors, to perform pulse emission in sequence and modulate the pulse emission during a period shorter than a modulation period controlled under the spatial light modulator is with the video image signal of one color from among the video image signals.Type: GrantFiled: October 1, 2008Date of Patent: November 22, 2011Assignees: Silicon Quest Kabushiki-Kaisha, Olympus CorporationInventors: Taro Endo, Kazuma Arai, Yoshihiro Maeda, Fusao Ishii
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Patent number: 8045254Abstract: The present invention discloses an image display system implemented with a spatial light modulator (SLM) having a plurality of pixel elements wherein each of the pixel elements further comprises an electrode having a structural body comprising: a first electrically conductive layer; a second electrically conductive layer; and a semiconductor layer disposed adjacently to the first electric conductive layer and second electric conductive layer and the semiconductor layer further comprises a doped conductive area for electrically connecting the first electric conductive layer and second electric conductive layer.Type: GrantFiled: November 13, 2009Date of Patent: October 25, 2011Assignees: Silicon Quest Kabushiki-Kaisha, Olympus CorporationInventors: Hirotoshi Ichikawa, Yoshihiro Maeda, Fusao Ishii
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Patent number: 8023172Abstract: A mirror device, comprising: a mirror; an electrode which is placed on a substrate and on which surface a cavity is formed; and a hinge placed between the mirror and electrode, wherein the hinge is connected to the cavity of the electrode.Type: GrantFiled: July 25, 2008Date of Patent: September 20, 2011Assignees: Silicon Quest Kabushiki-Kaisha, Olympus CorporationInventors: Fusao Ishii, Yoshihiro Maeda, Hirotoshi Ichikawa, Naoya Sugimoto
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Patent number: 7990339Abstract: A micromirror device, which makes an image display with digital image data, comprises pixel elements each of which makes pulse width modulation for incident light depending on the deflection state of light and which are arranged in the form of a matrix. Each of the pixel elements has a mirror, and at least one memory cell comprising a transistor and a capacitor. In such a micromirror device, the total value of the propagation delay time of a ROW line, which connects all of transistors of memory cells arranged successively in a ROW direction, and the switching time of each transistor is smaller than the driving interval of the ROW line driven in the minimum display duration of the micromirror device.Type: GrantFiled: December 26, 2007Date of Patent: August 2, 2011Assignees: Silicon Quest Kabushiki-Kaisha, Olympus CorporationInventors: Kazuma Arai, Fusao Ishii, Yoshihiro Maeda
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Patent number: 7982690Abstract: A micromirror device, which makes an image display with digital image data, comprises pixel elements each of which makes pulse width modulation for incident light depending on the deflection state of light and which are arranged in the form of an array. The array of the pixel elements is composed of B subsets each including pixel elements of Ms (COLUMNs)×Ns (ROWs) (Ms, Ns, and B are natural numbers). Each of the pixel elements has a mirror, and at least one memory cell. The memory cell has a transistor of an input gate capacity Ct[F]. Each memory cell is connected by a ROW line having a wiring resistance R[?], and a wiring capacity C[F]. When a gray scale display of 10 [bits] or more for each color is made with a color sequential display of C0 colors, Ms, Ns, B, Ct, R, C, and C0 have a relationship of R*(Ct+C)<(1.63*10?5*B)/[Co*Ms*Ns*(Ms+1)].Type: GrantFiled: December 26, 2007Date of Patent: July 19, 2011Assignees: Silicon Quest Kabushiki-Kaisha, Olympus CorporationInventors: Kazuma Arai, Fusao Ishii, Yoshihiro Maeda
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Patent number: 7969395Abstract: The present invention discloses a spatial light modulator includes a plurality of pixel elements disposed on a substrate. Each of the pixel elements comprises a deflectable micromirror. Specifically, instead of SRAM, the spatial light modulator is implemented with a DRAM in each of the pixel elements. The DRAM in each of the pixel elements has a smaller number of transistors than SRAM. The spatial light modulator can be manufactured with smaller pixel size and circuit configuration with improved withstand voltage. Further improvements can also be achieved for manufactured the spatial light modulator with smaller capacitor with better layout configuration for wire connections and control signal transmissions.Type: GrantFiled: March 30, 2009Date of Patent: June 28, 2011Assignees: Silicon Quest Kabushiki-Kaisha, Olympus CorporationInventors: Naoya Sugimoto, Yoshihiro Maeda, Fusao Ishii
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Patent number: 7969384Abstract: A micromirror device, which makes an image display with digital image data, comprises pixel elements each of which makes pulse width modulation (PWM) for incident light depending on the deflection state of light and which are arranged in the form of a matrix. Each of the pixel elements has a mirror, at least one memory cell comprising a transistor and a capacitor, and an electrode connected to each transistor. Memory cells arranged successively in a ROW direction are connected by a ROW line. The image data is loaded at a time interval during which the voltage of the electrode can hold the deflection state of a pixel element.Type: GrantFiled: December 26, 2007Date of Patent: June 28, 2011Assignees: Silicon Quest Kabushiki Kaisha, Olympus CorporationInventors: Kazuma Arai, Fusao Ishii, Yoshihiro Maeda
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Patent number: 7961161Abstract: A display system includes a spatial light modulator for displaying a image by the modulation state of a plurality of micromirrors, and a control device for controlling the spatial light modulator. The control device includes a data conversion device for converting the digital image data into non-binary data, and a modulation-control device for generating a modulation control signal for micromirrors depending on the non-binary data, and controlling the spatial light modulator. The modulation state of the micromirrors by the modulation control signal includes modulation by oscillation of the micromirrors. The modulation control signal controls amplitude of the oscillation to be smaller than the maximum amplitude of the micromirrors in the modulation by the oscillation of the micromirrors. The oscillation having smaller amplitude than the maximum amplitude of the micromirrors is repeated by the modulation control signal in an optional time duration or frequency.Type: GrantFiled: March 1, 2008Date of Patent: June 14, 2011Assignees: Silicon Quest Kabushiki-Kaisha, Olympus CorporationInventors: Taro Endo, Yoshihiro Maeda, Kazuma Arai, Fusao Ishii
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Patent number: 7957050Abstract: The present invention provides an image display system implemented with a mirror device comprises a plurality of pixel elements formed on a substrate: wherein: each of said pixel elements comprises a micromirror disposed above and supported on a hinge extended from said substrate; and; a drive electrode disposed on the substrate for receiving signals to control and drive the mirror, wherein the drive electrode comprises an insulation layer, and a first electrode connected to a memory and a second electrode connected to a plate line with the insulation layer disposed between and insulating the first and the second electrode.Type: GrantFiled: November 16, 2009Date of Patent: June 7, 2011Assignees: Silicon Quest Kabushiki-Kaisha, Olympus CorporationInventors: Naoya Sugimoto, Yoshihiro Maeda, Fusao Ishii
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Patent number: 7956319Abstract: A mirror device including: a mirror arranged on a substrate, supported by a hinge, and arranged substantially parallel to the substrate; a plurality of address electrodes for deflecting the mirror to an ON state, an OFF state, or an oscillating state; and a drive circuit for applying a voltage to the plurality of address electrodes. The mirror device is controlled such that a voltage can be applied to a corresponding address electrode to deflect the mirror, and oscillation in the oscillating state can be started from a state of the deflected mirror.Type: GrantFiled: December 24, 2007Date of Patent: June 7, 2011Assignees: Silicon Quest Kabushiki-Kaisha, Olympus CorporationInventors: Yoshihiro Maeda, Fusao Ishii, Hirotoshi Ichikawa, Kazuma Arai
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Patent number: 7948505Abstract: The present invention provides an image signal processor, comprising: (a) an input circuit for receiving and/or holding an image signal of N-bit binary data word, where N is a positive integer; (b) a data converter converting at least M-bit data of binary data into non-binary data having multiple bits, where M is a positive integer and N?M?2, wherein (c) all bits of the non-binary data have a weight which is equal to, or less than, that of the least significant bit of the M-bit data of binary data; and (d) the data converter outputting the each bit of the non-binary data in sequence starting from an equal data value.Type: GrantFiled: August 16, 2007Date of Patent: May 24, 2011Assignees: Silicon Quest Kabushiki-Kaisha, Olympus CorporationInventors: Kazuma Arai, Fusao Ishii, Yoshihiro Maeda, Hirotoshi Ichikawa
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Patent number: 7944600Abstract: A micromirror device includes an elastic hinge for supporting a mirror on a substrate, and an address electrode for deflecting the mirror. The device further includes a protective layer and an oriented monolayer laid to cover a stopper also functioning as an address electrode provided below the mirror and between the mirror and the substrate.Type: GrantFiled: May 2, 2008Date of Patent: May 17, 2011Assignees: Silicon Quest Kabushiki-Kaisha, Olympus CorporationInventors: Yoshihiro Maeda, Fusao Ishii, Kazuhiro Watanabe, Hirotoshi Ichikawa