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1. 发明授权

US11720010B2 Light source device and projection device 有权
公开(公告)号：US11720010B2
公开(公告)日：2023-08-08
申请号：US17539204
申请日：2021-12-01
申请人： Kazuhiro Fujita , Yohei Takano , Makoto Hirakawa , Shigeaki Imai
发明人： Kazuhiro Fujita , Yohei Takano , Makoto Hirakawa , Shigeaki Imai
IPC分类号： G03B21/20 , H04N9/31 , G02B26/00 , G02B27/14
CPC分类号： G03B21/204 , G02B26/008 , G02B27/141 , G03B21/208 , G03B21/2013 , G03B21/2066 , H04N9/3158 , H04N9/3161
摘要： A light source device includes a light source, a plurality of wavelength conversion units, and a plurality of optical systems. The plurality of wavelength conversion units each includes a wavelength conversion region configured to receive light emitted from the light source and emit light with a wavelength different from a wavelength of the received light. The plurality of optical systems are configured to form images of wavelength conversion regions of the plurality of wavelength conversion units. The light source is configured to irradiate the wavelength conversion units with light at a same timing. The plurality of optical systems are configured to cause the images of the wavelength conversion regions of the plurality of wavelength conversion units to be adjacent to or superimposed on each other.

2. 发明授权

US11874592B2 Light source device and image projection apparatus 有权
公开(公告)号：US11874592B2
公开(公告)日：2024-01-16
申请号：US17692208
申请日：2022-03-11
申请人： Kasumi Nakamura , Yohei Takano , Kazuhiro Fujita , Takashi Sasaki , Shigeaki Imai , Makoto Hirakawa
发明人： Kasumi Nakamura , Yohei Takano , Kazuhiro Fujita , Takashi Sasaki , Shigeaki Imai , Makoto Hirakawa
IPC分类号： G03B21/20 , G02B26/00
CPC分类号： G03B21/204 , G02B26/008 , G03B21/208 , G03B21/2013 , G03B21/2066
摘要： A light source device includes: a first light source to emit first color light; a second light source to emit second color light; a wavelength conversion unit to convert at least a portion of the first color light into a third color light; a light incident element to which the first color light, the second color light, and the third color light enter; a first filter to reflect the first color light toward the wavelength conversion unit; and a second filter to reflect the second color light toward the light incident element. The first filter and the second filter are separately disposed on an optical path of the third color light between the wavelength conversion unit and the light incident element.

3. 发明授权

US11812201B2 Light guide optical device, light source device, and image projection apparatus 有权
公开(公告)号：US11812201B2
公开(公告)日：2023-11-07
申请号：US17724514
申请日：2022-04-20
申请人： Takashi Sasaki , Yohei Takano , Kasumi Nakamura , Kazuhiro Fujita , Makoto Hirakawa , Shigeaki Imai
发明人： Takashi Sasaki , Yohei Takano , Kasumi Nakamura , Kazuhiro Fujita , Makoto Hirakawa , Shigeaki Imai
IPC分类号： G02B27/09 , G02B27/10 , G03B21/20 , H04N9/31 , F21V8/00
CPC分类号： H04N9/317 , G02B6/0096 , G02B27/0994 , G02B27/10 , G03B21/204 , G03B21/2013 , G03B21/2066
摘要： A light guide optical device includes an optical path combiner including: a first deflector to deflect first light incident from a first direction to an emission direction; a second deflector to deflect second light incident from a second direction different from the first direction, to the emission direction; and a transmission portion between the first deflector and the second deflector, the transmission portion to transmit third light incident from a third direction different from each of the first direction and the second direction, to the emission direction. The optical path combining unit combines the first light, the second light, and the third light, and emits the combined light to the mission direction.

4. 发明授权

US11630288B2 Image projection apparatus 有权
公开(公告)号：US11630288B2
公开(公告)日：2023-04-18
申请号：US17462109
申请日：2021-08-31
申请人： Yohei Takano , Shigeaki Imai , Kazuhiro Fujita , Makoto Hirakawa
发明人： Yohei Takano , Shigeaki Imai , Kazuhiro Fujita , Makoto Hirakawa
IPC分类号： G02B13/16 , G02B5/00 , G02B7/02 , G02B26/08 , G03B21/00 , G02B13/22 , G03B21/20
摘要： An image projection apparatus includes: a light source; an image display element including multiple micromirrors arranged in two dimensions, the multiple micromirrors forming an image display plane, each micromirror having a reflecting surface; and a projection optical system. Conditional expressions (1) and (2) below are satisfied: θ1≥14(deg) (1) 1.2

5. 发明授权

US11537037B2 Light source device, image projection apparatus, and light source optical system 有权
公开(公告)号：US11537037B2
公开(公告)日：2022-12-27
申请号：US17509106
申请日：2021-10-25
申请人： Yohei Takano , Kazuhiro Fujita , Makoto Hirakawa , Shigeaki Imai
发明人： Yohei Takano , Kazuhiro Fujita , Makoto Hirakawa , Shigeaki Imai
IPC分类号： G03B21/20 , G02B27/10 , G03B33/12
摘要： A light source device includes: multiple light source units each including a light source to emit a first color light beam, each of the multiple light source units configured to: convert at least part of the first color light beam into a second color light beam emitted from an emitting region; and emit the second color light beam to form a conjugate image; and a light combiner to combine the conjugate images formed by the multiple light source units to form a combined image, in which the conjugate images partially overlap each other, on a plane of an entrance surface of a light uniformizing element along a central axis of the light uniformizing element. A conditional expression below is satisfied: 1.3>SC/SI>0.7 where SC is an area of the combined image, and SI is an area of the entrance surface of the light uniformizing element.

6. 发明授权

US11506967B2 Light-source device and image projection apparatus 有权
公开(公告)号：US11506967B2
公开(公告)日：2022-11-22
申请号：US17109174
申请日：2020-12-02
申请人： Kasumi Nakamura , Yohei Takano , Makoto Hirakawa , Kazuhiro Fujita
发明人： Kasumi Nakamura , Yohei Takano , Makoto Hirakawa , Kazuhiro Fujita
IPC分类号： G03B21/20 , G03B33/12
摘要： A light-source device includes an excitation light source; a wavelength conversion unit to convert at least some of first color light into second color light; a light mixing element including a rod integrator to mix at least one of the first color light and the second color light from the conversion unit; and an optical element on an optical path of the first color light and having a reflecting surface. A center of the first color light on the reflecting surface intersects with only one of a first light flux of the first color light incident on and a second light flux of the first color light emitted from the conversion unit. An angle formed by a projection straight line of the first color light incident on an incident aperture of the integrator and a predetermined axial line of the incident aperture of the integrator is smaller than 40°.

7. 发明授权

US11669004B2 Light source optical system, light source device, light source unit, and image display apparatus 有权
公开(公告)号：US11669004B2
公开(公告)日：2023-06-06
申请号：US17533119
申请日：2021-11-23
申请人： Makoto Hirakawa , Yohei Takano , Kasumi Nakamura
发明人： Makoto Hirakawa , Yohei Takano , Kasumi Nakamura
IPC分类号： G03B21/20 , G02B27/28 , G02B27/10 , F21V8/00 , G02B6/10 , G02B6/27
CPC分类号： G03B21/204 , G02B27/1066 , G02B27/283 , G03B21/208 , G03B21/2066 , G02B6/0056 , G02B6/105 , G02B6/2773
摘要： A light source optical system includes: a first optical system configured to guide a first light beam having a first wavelength emitted from a light source to a wavelength conversion element; the wavelength conversion element configured to convert the first light beam into a second light beam having a second wavelength different from the first wavelength, and emit the second light beam; and a second optical system through which the second light beam emitted from the light conversion element passes. The second optical system includes a light guide element configured to guide a portion of the second light beam from one end surface of the light guide element to the other end surface of the light guide element to separate the portion of the second light beam from the second light beam.

8. 发明授权

US11829058B2 Light source device and image projection apparatus including a rod integrator and light guide 有权
公开(公告)号：US11829058B2
公开(公告)日：2023-11-28
申请号：US16823340
申请日：2020-03-19
申请人： Kasumi Nakamura , Yohei Takano , Tatsuya Takahashi , Makoto Hirakawa
发明人： Kasumi Nakamura , Yohei Takano , Tatsuya Takahashi , Makoto Hirakawa
IPC分类号： G03B21/20 , H04N9/31
CPC分类号： G03B21/204 , G03B21/2033 , G03B21/2066 , H04N9/3152
摘要： A light-source device includes an excitation light source; an optical element having a reflecting surface to reflect first colored light emitted from the excitation light source; and a wavelength conversion unit including a waveform conversion member configured to convert at least a portion of the first colored light reflected by the optical element and incident on the wavelength conversion unit, into second colored light having a wavelength different from a wavelength of the first colored light and emit the second colored light. A point P does not intersect with a light flux Q where the point P is a center of the first colored light on the reflecting surface of the optical element and the light flux Q is a light flux of the first colored light emitted from the wavelength conversion unit.

9. 发明授权

US10073333B2 Light irradiation device, and image display equipped with the same, for emitting light of two or more components by laser light 有权
公开(公告)号：US10073333B2
公开(公告)日：2018-09-11
申请号：US15233037
申请日：2016-08-10
申请人： Takehiro Nishimori , Kazuhiro Fujita , Toshiharu Murai , Tatsuya Takahashi , Junichi Kitabayashi , Kaoru Itoh , Makoto Hirakawa
发明人： Takehiro Nishimori , Kazuhiro Fujita , Toshiharu Murai , Tatsuya Takahashi , Junichi Kitabayashi , Kaoru Itoh , Makoto Hirakawa
IPC分类号： G03B21/20 , G03B21/14 , G03B33/08 , H04N9/31 , G02B26/00 , G02B27/14
CPC分类号： G03B21/204 , G02B26/008 , G02B27/141 , G03B21/14 , G03B21/2033 , G03B21/206 , G03B21/208 , G03B21/2086 , G03B33/08 , H04N9/3114 , H04N9/3161
摘要： A light irradiation device for emitting light of two or more components by laser light, which a laser light source emits, to an outside, includes a diffusion optical path change member configured to convert a first color component of the laser light into diffusion light and change an optical path of the first color component; a phosphor configured to generate fluorescence of a second color component different from the first color component based on the laser light, and change an optical path of the second color component; and an optical path switch member configured to switch between a first optical path for emitting the first color component to the outside and a second optical path for emitting the second color component to the outside. Light going straight at a light diffusion position of the diffusion optical path change member is not emitted to the outside.

10. 发明授权

US09221272B2 Optical scanning device and image forming apparatus 有权
标题翻译：光学扫描装置和图像形成装置
公开(公告)号：US09221272B2
公开(公告)日：2015-12-29
申请号：US11857069
申请日：2007-09-18
申请人： Makoto Hirakawa
发明人： Makoto Hirakawa
IPC分类号： B41J15/14 , B41J27/00 , B41J2/47 , G02B26/10 , G02B26/12
CPC分类号： B41J2/473 , G02B26/105 , G02B26/123
摘要： An optical scanning device includes a light-source unit that emits a plurality of light beams, a deflector that deflects the light beams, and an image-forming optical system that receives the light beam deflected by the deflector and forms a spot image on photoconductors. The image-forming optical system includes a first scanning lens that allows only a corresponding light beam to pass and is arranged to form, upon receiving a virtual light beam, the spot image on the photoconductor with a not-curved line. The virtual line lies between a pair of light beams that travels in one of areas separated by a reference plane that is parallel to a sub-scanning direction and on which a normal line to a deflection plane of the deflector falls.
摘要翻译：光学扫描装置包括发射多个光束的光源单元，使光束偏转的偏转器，以及接收由偏转器偏转的光束并在光电导体上形成点图像的成像光学系统。图像形成光学系统包括第一扫描透镜，其仅允许对应的光束通过并且布置成在接收到虚拟光束时以非弯曲线形成光电导体上的斑点图像。虚拟线位于一对光束之间，该对光束在由与副扫描方向平行的基准平面隔开的区域中行进，并且与偏转器的偏转平面的法线相对应。

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