Patents by Inventor Takuro HIROKAWA
Takuro HIROKAWA 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: 10139620Abstract: Provided is a head-up display capable of displaying a plurality of virtual images presented at different distances while increasing the design flexibility in the display device for creating the virtual images. The head-up display comprises: a first display surface disposed to extend the light path of first image light emitted toward a viewer and a second display surface disposed to make the light path of second image light emitted shorter than that of the first image light; a first concave reflector for reflecting the first image light and the second image light; and a second concave reflector for reflecting the image light reflected from the first concave reflector. The first concave reflector is configured such that the first image light and the second image light intersect with each other in the vertical direction between the first concave reflector and the second concave reflector.Type: GrantFiled: March 14, 2016Date of Patent: November 27, 2018Assignee: NIPPON SEIKI CO., LTD.Inventors: Takashi Yamazoe, Takuro Hirokawa
-
Patent number: 10133161Abstract: A projection display device includes a first substrate on which a red light source is mounted, a second substrate on which a green light source is mounted, a third substrate on which a blue light source is mounted, a housing to which the first through third substrates are attached, an optical member accommodated inside the housing, and a light modulating element; light emitted inside the housing from the red light source, the green light source, and the blue light source being distributed by the optical member, the distributed light being converted to a prescribed display image by the light modulating element, and the light being projected outside the housing. The first through third substrates are made of metal or of filler-containing plastic compounded with a filler having high thermal conductivity, and the housing is made of metal or a filler-containing plastic compounded a filler having high thermal conductivity.Type: GrantFiled: May 13, 2016Date of Patent: November 20, 2018Assignee: Nippon Seiki Co., Ltd.Inventors: Akinori Koiida, Yuichi Takahashi, Takuro Hirokawa, Takayuki Hatano
-
Patent number: 10120189Abstract: The objective of the present invention is to provide a heads-up display device able to efficiently orient image light towards a viewer by means of a simple configuration. The heads-up display device is provided with: a projection unit that emits projection light depicting a display image; a first reflection unit and second reflection unit that reflect the projection light exiting the projection unit towards a transmissive screen; and the transmissive screen that outputs image light towards an observer by transmitting/scattering the projection light. By adjusting the angle of the light axis of the projection light entering the transmissive screen by rotating the first reflection unit and second reflection unit, the angle of the image light exiting the transmissive screen is adjusted.Type: GrantFiled: May 29, 2015Date of Patent: November 6, 2018Assignee: Nippon Seiki Co., Ltd.Inventors: Maiko Saito, Yuichi Takahashi, Takuro Hirokawa, Takashi Yamazoe, Kazuo Morohashi
-
Patent number: 10114218Abstract: The problem addressed by the present invention is to provide a head up display device capable of counteracting sunlight without using a shutter or a reflection type polarizing film. A first concave mirror has a curvature to cause the reflected display light to intersect vertically before reaching a second mirror, and a second concave mirror serves to reflect the received display light. A case is provided with a first shield and a second shield extending near an intersecting point to sandwich a light path between the first and second concave mirrors. The first and second shields can block external light entering into the case from outside the case and proceeding toward the first concave mirror after being reflected from the second concave mirror.Type: GrantFiled: November 11, 2015Date of Patent: October 30, 2018Assignee: NIPPON SEIKI CO., LTD.Inventors: Takashi Yamazoe, Takuro Hirokawa
-
Publication number: 20180136548Abstract: A projection display device includes a first substrate on which a red light source is mounted, a second substrate on which a green light source is mounted, a third substrate on which a blue light source is mounted, a housing to which the first through third substrates are attached, an optical member accommodated inside the housing, and a light modulating element; light emitted inside the housing from the red light source, the green light source, and the blue light source being distributed by the optical member, the distributed light being converted to a prescribed display image by the light modulating element, and the light being projected outside the housing. The first through third substrates are made of metal or of filler-containing plastic compounded with a filler having high thermal conductivity, and the housing is made of metal or a filler-containing plastic compounded a filler having high thermal conductivity.Type: ApplicationFiled: May 13, 2016Publication date: May 17, 2018Inventors: Akinori KOIIDA, Yuichi TAKAHASHI, Takuro HIROKAWA, Takayuki HATANO
-
Publication number: 20180129042Abstract: Provided is a head-up display capable of displaying a plurality of virtual images presented at different distances while increasing the design flexibility in the display device for creating the virtual images. The head-up display comprises: a first display surface disposed to extend the light path of first image light emitted toward a viewer and a second display surface disposed to make the light path of second image light emitted shorter than that of the first image light; a first concave reflector for reflecting the first image light and the second image light; and a second concave reflector for reflecting the image light reflected from the first concave reflector. The first concave reflector is configured such that the first image light and the second image light intersect with each other in the vertical direction between the first concave reflector and the second concave reflector.Type: ApplicationFiled: March 14, 2016Publication date: May 10, 2018Inventors: Takashi YAMAZOE, Takuro HIROKAWA
-
Publication number: 20170315351Abstract: The problem addressed by the present invention is to provide a head up display device capable of counteracting sunlight without using a shutter or a reflection type polarizing film. A first concave mirror has a curvature to cause the reflected display light to intersect vertically before reaching a second mirror, and a second concave mirror serves to reflect the received display light. A case is provided with a first shield and a second shield extending near an intersecting point to sandwich a light path between the first and second concave mirrors. The first and second shields can block external light entering into the case from outside the case and proceeding toward the first concave mirror after being reflected from the second concave mirror.Type: ApplicationFiled: November 11, 2015Publication date: November 2, 2017Inventors: Takashi YAMAZOE, Takuro HIROKAWA
-
Patent number: 9753289Abstract: Provided is a head up display device with which it is possible to adjust the projection location of display light depending on the height of the observer's point of view, without moving the virtual image in the vertical direction. This head up display device is provided with: a case which retains a display and a concave mirror in a prescribed positional relationship; a first driving means which rotates the concave mirror; a second driving means which moves the case frontward and rearward; and a control means which operates the first and second drive means in accordance with information about the viewpoint position of the observer, and adjusts the projection location of display light (L) on front glass depending on the height of the observer's point of view.Type: GrantFiled: September 16, 2014Date of Patent: September 5, 2017Assignee: NIPPON SEIKI CO., LTD.Inventors: Takuro Hirokawa, Takeshi Yachida
-
Publication number: 20170115485Abstract: The objective of the present invention is to provide a heads-up display device able to efficiently orient image light towards a viewer by means of a simple configuration. The heads-up display device is provided with: a projection unit that emits projection light depicting a display image; a first reflection unit and second reflection unit that reflect the projection light exiting the projection unit towards a transmissive screen; and the transmissive screen that outputs image light towards an observer by transmitting/scattering the projection light. By adjusting the angle of the light axis of the projection light entering the transmissive screen by rotating the first reflection unit and second reflection unit, the angle of the image light exiting the transmissive screen is adjusted.Type: ApplicationFiled: May 29, 2015Publication date: April 27, 2017Inventors: Maiko SAITO, Yuichi TAKAHASHI, Takuro HIROKAWA, Takashi YAMAZOE, Kazuo MOROHASHI
-
Publication number: 20160216521Abstract: Positional error (erroneous display) of a virtual image displayed in correspondence to a specific object in a scenery outside a vehicle is suppressed so as to enable a viewer to recognize information without a sense of discomfort. A forward information acquisition unit estimates the position of a specific object outside a vehicle, and a first display means generates an information picture about the specific object. A picture position adjustment means adjusts the position at which the information picture is projected in accordance with the position of the specific object estimated by the forward information acquisition unit. A behavior detection means detects a behavior of the vehicle, and the picture position adjustment means corrects the position at which the information picture is projected on the basis of the vehicle behavior detected by the behavior detection means.Type: ApplicationFiled: October 16, 2014Publication date: July 28, 2016Applicants: NIPPON SEIKI CO., LTD., NIPPON SEIKI CO., LTD.Inventors: Takeshi YACHIDA, Takuro HIROKAWA
-
Publication number: 20160209663Abstract: Provided is a head up display device with which it is possible to adjust the projection location of display light depending on the height of the observer's point of view, without moving the virtual image in the vertical direction. This head up display device is provided with: a case which retains a display and a concave mirror in a prescribed positional relationship; a first driving means which rotates the concave mirror; a second driving means which moves the case frontward and rearward; and a control means which operates the first and second drive means in accordance with information about the viewpoint position of the observer, and adjusts the projection location of display light (L) on front glass depending on the height of the observer's point of view.Type: ApplicationFiled: September 16, 2014Publication date: July 21, 2016Applicant: Nippon Seiki Co., Ltd.Inventors: Takuro HIROKAWA, Takeshi YACHIDA