Patents by Inventor Takashi Takeda
Takashi Takeda 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: 11646569Abstract: A secondary battery protection circuit for protecting a secondary battery, including: a low-voltage detecting circuit configured to detect a voltage across the secondary battery that is lower than a second voltage for low voltage detection, the second voltage being set to be lower than a first voltage for overdischarge detection; and a switching circuit configured to cause a gate of a charge control NMOS transistor to be fixed at a potential at a high side power supply terminal, upon detecting, by the low-voltage detecting circuit, that the voltage across the secondary battery is lower than the second voltage for low voltage detection.Type: GrantFiled: January 20, 2022Date of Patent: May 9, 2023Assignee: MITSUMI ELECTRIC CO., LTD.Inventor: Takashi Takeda
-
Publication number: 20230139134Abstract: Provided is a virtual image display apparatus including a display device configured to emit an imaging light; a first mirror configured to reflect the imaging light from the display device; a refractive reflective optical member including a mirror portion configured to reflect the imaging light reflected by the first mirror; and a second mirror configured to reflect the imaging light reflected by the mirror portion toward a position of an exit pupil, wherein a distance from the display device to the first mirror is shorter than a distance from the position of the exit pupil to the second mirror; and a first angle ? formed by the imaging light incident on the second mirror and the imaging light reflected by the second mirror is greater than 0° and 45° or less.Type: ApplicationFiled: October 28, 2022Publication date: May 4, 2023Applicant: SEIKO EPSON CORPORATIONInventor: Takashi TAKEDA
-
Patent number: 11640060Abstract: A head-mounted display includes an image display device including a panel unit serving as a display element configured to display an image, a colored optical member disposed on a light path of imaging light emitted from the panel unit and having a yellowness of a predetermined value or greater, and a coloring correction optical member configured to correct a degree of coloring of the imaging light of the entire light path in accordance with the yellowness of the colored optical member.Type: GrantFiled: October 27, 2020Date of Patent: May 2, 2023Assignee: SEIKO EPSON CORPORATIONInventors: Tokito Yamaguchi, Masayuki Takagi, Toshiaki Miyao, Akira Komatsu, Takashi Takeda
-
Publication number: 20230102935Abstract: A projection device according to the present disclosure includes a light emission display panel in which a plurality of pixels including a light emission element are arranged in a matrix shape, a scanning mirror configured to reflect, toward a scanned surface, imaging light emitted from the light emission display panel and performs two-dimensional scanning of the reflected imaging light on the scanned surface, and a projection optical system configured to guide the imaging light from the light emission display panel to the scanning mirror.Type: ApplicationFiled: September 29, 2022Publication date: March 30, 2023Applicant: SEIKO EPSON CORPORATIONInventor: Takashi TAKEDA
-
Publication number: 20230080118Abstract: An information processing device functions as a slave device connected to a master device via a communication network including a daisy chain connection. The information processing device includes: a communication part which performs communication processing using the communication network; a storage control part which performs control to store in a storage part communication state information indicating a communication state in the communication network detected in the communication part; a determination part which, with reference to the communication state information stored in the storage part, determines whether a communication load of a predetermined value or more is present in the communication network; and an output control part which, if the determination part determines that the communication load is present, performs control to output a result of the determination.Type: ApplicationFiled: January 18, 2021Publication date: March 16, 2023Applicant: OMRON CorporationInventors: Takashi TAKEDA, Hirohito MIZUMOTO
-
Patent number: 11598968Abstract: The image display device includes an image generating unit that emits first image light, a pupil expanding element that expands a diameter of a light flux included in the first image light from the image generating unit to obtain second image light, a first light condensing optical system that condenses the second image light and forms an intermediate image, and a second light condensing optical system that condenses light from the intermediate image and generates a virtual image on eye of a viewer, in a plane including at least the image generating unit, the pupil expanding element, and the eye of the viewer, a maximum emission angle of the first image light is smaller than a maximum viewing angle of the virtual image, and the diameter of the light flux included in the second image light is greater than that of a light flux included in the virtual image.Type: GrantFiled: July 1, 2020Date of Patent: March 7, 2023Assignee: SEIKO EPSON CORPORATIONInventors: Masatoshi Yonekubo, Osamu Yokoyama, Takashi Takeda, Mitsutaka Ide, Daisuke Ishida
-
Publication number: 20230064446Abstract: The invention provides a cable abnormality assessment system, a slave device, and a cable abnormality assessment method. A cable abnormality assessment system is provided with a diagnosis control unit for assessing a cable abnormality on the basis of link-up information between a communication unit and another machine connected to the other end of a cable, and first and second information that are the respective results of abnormality diagnosis by a signal line diagnosis unit with regard to one and the other of two pair signal lines of the cable.Type: ApplicationFiled: February 9, 2021Publication date: March 2, 2023Applicant: OMRON CorporationInventor: Takashi TAKEDA
-
Publication number: 20230068994Abstract: A vehicle theft deterrent apparatus includes a driver verifier, a steering torque detector, an actuator, and a steering controller. The steering torque detector is configured to detect steering torque input by a driver to a steering system. The actuator is configured to generate drive torque to be given to the steering system. The driver verifier is configured to verify whether driver information obtained from the driver matches registered information registered in advance. The steering controller is configured to control the drive torque generated by the actuator based on the steering torque. In a case where the driver verifier determines that the driver information does not match the registered information, the steering controller is configured to permit the driver to steer until a vehicle drives a set distance, and then to cause the actuator to generate the drive torque prohibiting the driver from steering.Type: ApplicationFiled: August 2, 2022Publication date: March 2, 2023Inventors: Minoru OMORI, Takashi TAKEDA, Satoru AKIYAMA, Eiichi SHIRAISHI, Shintaro IKEDA
-
Patent number: 11575161Abstract: A secondary battery protection circuit for controlling charge and discharge using a switching circuit to protect a secondary battery from temperature is provided. The switching circuit is configured to be provided in a charge-and-discharge path between the secondary battery and an external device. The secondary battery protection circuit includes a detection terminal configured to be electrically connected, via a resistor, to between the switching circuit and the external device. The secondary battery protection circuit includes a first terminal configured to be electrically connected to a temperature detection terminal of the external device. The secondary battery protection circuit includes a second terminal to which a temperature sensitive element is configured to be electrically connected, the temperature sensitive element having a characteristic value varying in accordance with a change in temperature of the secondary battery.Type: GrantFiled: October 13, 2020Date of Patent: February 7, 2023Assignee: MITSUMI ELECTRIC CO., LTD.Inventors: Yohei Watanabe, Takashi Takeda, Junji Takeshita, Daisuke Suzuki
-
Publication number: 20230033946Abstract: A braking control apparatus includes a contact determiner and a collision brake processor. The contact determiner is configured to determine whether a collision determination on a contact of a vehicle is satisfied. The collision brake processor is configured to cause a brake device of the vehicle to generate a braking force to achieve a predetermined deceleration rate of the vehicle if the contact determination is satisfied. The collision brake processor is configured to, upon determining that the brake device is in a predetermined pre-contact braking state immediately before the contact determination is satisfied, set a deceleration rate of the vehicle after the contact determination is satisfied to a value larger than in a case where the collision brake processor does not determine that the brake device is in the predetermined pre-contact braking state.Type: ApplicationFiled: July 21, 2022Publication date: February 2, 2023Inventor: Takashi TAKEDA
-
Patent number: 11567327Abstract: A display module includes an image light generation device configured to generate image light, a first reflection section configured to reflect the image light from the image light generation device, a first diffraction element configured to diffract the image light entering a first incident surface, a second reflection section configured to reflect the image light from the first diffraction element, and a second diffraction element configured to diffract the image light entering a second incident surface, thereby forming an exit pupil. When viewed from a normal line direction of a virtual plane including a normal line of the first incident surface and a normal line of the second incident surface, an optical axis of the image light from the image light generation device toward the first reflection section and an optical axis of the image light from the first diffraction element toward the second reflection section intersect each other.Type: GrantFiled: January 29, 2021Date of Patent: January 31, 2023Assignee: SEIKO EPSON CORPORATIONInventors: Masatoshi Yonekubo, Takashi Takeda, Mitsutaka Ide
-
Patent number: 11550155Abstract: A virtual image display apparatus includes an image light generation device, a projection optical system configured to project image light emitted from the image light generation device, a folding mirror configured to reflect the image light from the projection optical system in an intersection direction, a semi-transmissive mirror configured to reflect a part of the image light from the folding mirror, and a concave mirror configured to reflect the image light from the semi-transmissive mirror forming an exit pupil, in which the folding mirror is disposed between the semi-transmissive mirror and the concave mirror when viewed in a first direction, provided that the first direction is a direction from an intersection point between a projection optical axis that is an optical axis of the projection optical system and the folding mirror toward an emission optical axis that is an optical axis from the concave mirror toward the exit pupil.Type: GrantFiled: March 30, 2021Date of Patent: January 10, 2023Assignee: SEIKO EPSON CORPORATIONInventors: Daiki Matsumoto, Masatoshi Yonekubo, Takashi Takeda
-
Patent number: 11550154Abstract: A display element, and a light-guiding member including a plurality of reflection surfaces and configured to guide image light from the display element by reflecting the image light at an inner surface, and cause the image light and external light to be visually recognized in an overlapping manner are provided, wherein at a boundary between a first reflection surface and a second reflection surface adjacent to each other included in the plurality of reflection surfaces of the light-guiding member with at least one of the first reflection surface and the second reflection surface including a curved surface, an end of the first reflection surface and an end of the second reflection surface match when projected from a specific direction.Type: GrantFiled: October 29, 2020Date of Patent: January 10, 2023Assignee: SEIKO EPSON CORPORATIONInventors: Masayuki Takagi, Tokito Yamaguchi, Toshiaki Miyao, Takashi Takeda
-
Patent number: 11536967Abstract: A light-guiding device is configured to accept image light through a light incidence part, guide the image light through reflection, and emit, to outside through a light emission part, the image light that is guided, the light-guiding device includes a protective member having a sheet shape and configured to cover a body member in a region corresponding to an optical surface of a surface of the light-guiding device, and an adhesive layer is formed between the body member and the protective member.Type: GrantFiled: October 28, 2020Date of Patent: December 27, 2022Assignee: SEIKO EPSON CORPORATIONInventors: Toshiaki Miyao, Masayuki Takagi, Tokito Yamaguchi, Takashi Takeda
-
Patent number: 11506895Abstract: A light-guiding device includes a pair of light-guiding portions, a pair of light-incident portions that causes image light to be incident on the respective pair of light-guiding portions, and a pair of light-emitting portion that causes image light guided by the respective pair of light-guiding portions to exit outside, in which a pair of optical members including the pair of light-guiding portions are coupled by a central member having light transmissivity, and in which the central member includes a light-guide blocking structure that suppresses light from being incident from one end to another end of the central member by absorbing the light.Type: GrantFiled: November 29, 2019Date of Patent: November 22, 2022Assignee: SEIKO EPSON CORPORATIONInventors: Toshiaki Miyao, Masayuki Takagi, Takashi Takeda, Tokito Yamaguchi
-
Patent number: 11480799Abstract: A head-mounted display includes a display device configured to display an image, a diopter adjustment device configured to adjust a diopter, and a correction processing circuit serving as an image correction device configured to correct a display image in accordance with a degree of diopter adjustment. In the adjustments made on a left side and a right side, respectively, after diopter adjustment, the display image is corrected in accordance with the degree of diopter adjustment.Type: GrantFiled: September 1, 2021Date of Patent: October 25, 2022Assignee: SEIKO EPSON CORPORATIONInventors: Masayuki Takagi, Akira Komatsu, Takashi Takeda, Toshiaki Miyao, Tokito Yamaguchi
-
Patent number: 11448882Abstract: A virtual image display apparatus includes a display device serving as an image forming unit, an image optical system including a first mirror member serving as an outer mirror member and receiving imaging light from the display device, and a partially reflecting type mirror portion reflecting imaging light emitted from the image optical system toward a position of an exit pupil. The first mirror member serving as the outer mirror member and the partially reflecting type mirror portion are integrated.Type: GrantFiled: August 29, 2019Date of Patent: September 20, 2022Assignee: SEIKO EPSON CORPORATIONInventors: Takashi Takeda, Masayuki Takagi, Toshiaki Miyao, Tokito Yamaguchi
-
Patent number: 11435588Abstract: A virtual image display apparatus includes a display element, a projection lens configured to converge image light emitted from the display element, a prism configured to cause the image light by an internal reflecting surface thereof and moreover emit the image light from an emission surface thereof while refracting the image light, and a see-through mirror configured to reflect the image light emitted from the prism toward a pupil position. The projection lens, the prism, and the see-through mirror are arranged to form an off-axis system. AT an off-axis surface of the off-axis system, an intermediate pupil is arranged between the projection lens and the internal reflecting surface, with the intermediate pupil being arranged to be farther to the incident surface side of the prism than to the projection lens and the internal reflecting surface, and an intermediate image is formed between the prism and the see-through mirror.Type: GrantFiled: August 27, 2020Date of Patent: September 6, 2022Assignee: SEIKO EPSON CORPORATIONInventors: Takashi Takeda, Masayuki Takagi, Toshiaki Miyao, Tokito Yamaguchi
-
Publication number: 20220276476Abstract: An optical unit and an image display device include a display element configured to emit imaging light, a first mirror having partial transparency and configured to reflect a portion of the imaging light emitted from the display element, and a second mirror configured to return the imaging light reflected by the first mirror to the first mirror to form an exit pupil. The imaging light is incident on the first mirror from the display element at a first incident angle, and the imaging light is incident on the first mirror at a second incident angle that is smaller than the first incident angle from the second mirror, and the first mirror includes an angle dependent separation film that shows different separation characteristics for the imaging light according to the difference between the first incident angle and the second incident angle.Type: ApplicationFiled: February 24, 2022Publication date: September 1, 2022Applicant: SEIKO EPSON CORPORATIONInventors: Takashi TAKEDA, Masayuki TAKAGI, Kunihiko YANO
-
Publication number: 20220243126Abstract: Provided are a new phosphor having emission characteristics different from the conventional nitride or oxynitride phosphor, a manufacturing method, and a light-emitting device. In an embodiment, the phosphor may include inorganic substance having crystal represented by A26(D, E)51X86 including at least A, D, X (A is at least one kind of element selected from Mg, Ca, Sr, and Ba; and D is Si, and X is at least one kind of element selected from O, N, and F); and further includes, if necessary, E (E is at least one kind of element selected from B, Al, Ga, and In) wherein the crystal further includes M (M is at least one kind of element selected from Mn, Ce, Pr, Nd, Sm, Eu, Tb, Dy, and Yb). Upon irradiation of excitation source, the maximum value of emission peak in a wavelength range from 630 nm to 850 nm may occur.Type: ApplicationFiled: March 31, 2020Publication date: August 4, 2022Applicant: National Institute for Materials ScienceInventors: Naoto HIROSAKI, Takashi TAKEDA, Shiro FUNAHASHI