公开(公告)号：US20220342206A1

公开(公告)日：2022-10-27

申请号：US17763285

申请日：2020-09-09

Applicant: HAMAMATSU PHOTONICS K.K.

Inventor： Shinya IWASHINA ,  Shigeyuki NAKAMURA ,  Naoto SAKURAI ,  Yuki MORINAGA ,  Daiki SUZUKI

IPC: G02B26/10 ,  G02B26/08

Abstract: In an optical device, a mirror surface is provided in a movable portion. A support portion supports the movable portion through an elastic connection portion. A force generator generates force in the movable portion. A drive controller outputs a drive signal that operates the force generator. The movable portion has a resonance frequency higher than a frequency of the drive signal output from the drive controller in a state before the elastic connection portion is heated. The movable portion swings due to the elastic deformation of the elastic connection portion in response to the force of the force generator. A heat controller acquires a signal that indicates a swing state of the movable portion and performs, based on a phase of the acquired signal, feedback control of heating of the elastic connection portion by a heater.

公开(公告)号：US20180095351A1

公开(公告)日：2018-04-05

申请号：US15562008

申请日：2016-03-02

Applicant: HAMAMATSU PHOTONICS K.K.

Inventor： Naoto SAKURAI ,  Akihiro OGURI

IPC: G03B21/20 ,  G02F1/1333 ,  G09G3/02 ,  G09G3/34 ,  G09G3/00 ,  G02B26/10 ,  H04N9/31

CPC classification number: G03B21/2033 ,  B60K35/00 ,  B60K2350/2021 ,  B60K2350/2047 ,  B60K2350/2052 ,  B60K2350/2078 ,  B60K2350/352 ,  G02B5/0215 ,  G02B5/0278 ,  G02B26/10 ,  G02B26/101 ,  G02B27/0101 ,  G02F1/1333 ,  G03B21/2053 ,  G03B21/2086 ,  G03B21/26 ,  G09G3/006 ,  G09G3/02 ,  G09G3/34 ,  H04N5/74 ,  H04N9/3129 ,  H04N9/3155

Abstract: A projection display device includes: a light source that emits a first and a second laser lights; a scanning drive mirror that reflects the first and the second laser lights, and uses the first and the second laser lights in scanning; a light diffusion unit that includes a predetermined region that allows the first laser light to be transmitted therethrough, and diffuses the first laser light; a light detection unit that detects the second laser light that passed the predetermined region; and a control unit that executes a process to detect the second laser light, and determines a state of the predetermined region on the basis of a detection value of the light detection unit. In a case where the control unit determines that a defect occurs in the predetermined region as the state, the control unit executes a process to stop displaying the projection.

公开(公告)号：US20180067388A1

公开(公告)日：2018-03-08

申请号：US15561991

申请日：2016-03-02

Applicant: HAMAMATSU PHOTONICS K.K.

Inventor： Naoto SAKURAI ,  Akihiro OGURI

IPC: G03B21/20 ,  G02B26/10 ,  G02B27/01 ,  G02B27/09 ,  G03B21/28

CPC classification number: G03B21/2033 ,  B60K35/00 ,  B60K2370/1529 ,  B60K2370/23 ,  B60K2370/27 ,  B60K2370/333 ,  B60K2370/334 ,  B60K2370/52 ,  G02B5/0278 ,  G02B5/208 ,  G02B5/26 ,  G02B26/10 ,  G02B26/101 ,  G02B27/0101 ,  G02B27/0977 ,  G03B21/28 ,  H04N5/74

Abstract: A projection display device includes: a light source that emits a first laser light for displaying a projection and a second laser light for inspection; a scanning drive mirror that reflects the first laser light and the second laser light emitted from the light source, and uses the first laser light and the second laser light in scanning; a light diffusion unit that allows the first laser light used in the scanning by the scanning drive mirror to be transmitted through the light diffusion unit and diffuses the first laser light; a light selection unit that allows the first laser light to be transmitted through the light selection unit and reflects the second laser light at a position on an emission surface of the light diffusion unit; and a light detection unit that detects the second laser light reflected by the light selection unit.