公开(公告)号：US10746931B2

公开(公告)日：2020-08-18

申请号：US16523386

申请日：2019-07-26

Applicant: SEIKO EPSON CORPORATION

Inventor： Junichi Suzuki ,  Hidefumi Sakata ,  Yuichiro Iwama

IPC: F21V7/04 ,  G02B6/293 ,  F21V8/00 ,  H01L33/50

Abstract: A light source device includes a light source emitting first light in a first wavelength band, a light guide section guiding partial light of the first light, a wavelength conversion section including a phosphor, which other partial light of the first light, and which converts the other partial light into second light in a second wavelength band. A light guide section first side surface and a wavelength conversion section second side surface are opposed. The first side surface has a diffraction grating. The partial light enters the light guide section from the first side surface via the diffraction grating. The other partial light enters the wavelength conversion section from the second side surface. The partial and second lights are emitted in one of a normal direction of the first end surface of the light guide section and a normal direction of the third end surface of the wavelength conversion section.

公开(公告)号：US10660171B2

公开(公告)日：2020-05-19

申请号：US16145748

申请日：2018-09-28

Applicant: SEIKO EPSON CORPORATION

Inventor： Shun Sato ,  Junichi Suzuki ,  Masaru Kono

IPC: H05B41/39 ,  H05B41/392 ,  G03B21/20 ,  H05B41/292 ,  H05B41/16 ,  H05B41/288

Abstract: A discharge lamp drive device includes a discharge lamp driver adapted to supply a drive current to a discharge lamp having a first electrode and a second electrode, a control section adapted to control the discharge lamp driver, and a storage section adapted to store a plurality of drive patterns of the drive current. The control section is configured to select one drive pattern of the plurality of drive patterns based on machine learning, and execute the selected drive pattern. In a case in which a predetermined condition is fulfilled, the control section executes a predetermined drive pattern of the plurality of drive patterns without selecting and executing the drive pattern based on the machine learning.

公开(公告)号：US10222684B2

公开(公告)日：2019-03-05

申请号：US15887168

申请日：2018-02-02

Applicant: SEIKO EPSON CORPORATION

Inventor： Junichi Suzuki

IPC: G03B21/16 ,  H04N9/31 ,  G03B21/20 ,  H05B41/288

Abstract: A projector according to the invention includes a discharge lamp, a cooling section, and a control section. The control section is configured to execute a first cooling control in which a number of revolutions of the cooling section does not depend on an inter-electrode voltage of the discharge lamp and a second cooling control for controlling the cooling section based on first control information indicating a relation between the inter-electrode voltage and the number of revolutions. The number of revolutions in the first cooling control is equal to or smaller than the number of revolutions in the second cooling control. When the inter-electrode voltage is larger than a first voltage value or when a cumulative lighting time of the discharge lamp is larger than a first time, the control section configured to switch the control of the cooling section from the first cooling control to the second cooling control.

公开(公告)号：US09729838B2

公开(公告)日：2017-08-08

申请号：US14282685

申请日：2014-05-20

Applicant: SEIKO EPSON CORPORATION

Inventor： Junichi Suzuki ,  Shun Sato

IPC: H05B41/34 ,  H04N9/31 ,  H05B41/288 ,  G03B21/20

CPC classification number: H04N9/3155 ,  G03B21/2026 ,  H05B41/2886

Abstract: A discharge lamp driver includes a discharge lamp drive unit that supplies a drive current to the discharge lamp, and a control unit that controls the discharge lamp drive unit according to a drive current waveform, wherein the drive current waveform has a mixed frequency drive period including a unit drive period containing a first drive period in which a first drive current is supplied to the discharge lamp and a second drive period provided immediately after the first drive period, in which a second drive current is supplied to the discharge lamp, the first drive current is a half-period alternating current having a frequency higher than 10 Hz and not higher than 300 Hz, the second drive current is an alternating current having a frequency higher than 1000 Hz, and a length of the second drive period is equal to or longer than a length of the first drive period.

公开(公告)号：US09532439B2

公开(公告)日：2016-12-27

申请号：US14503853

申请日：2014-10-01

Applicant: SEIKO EPSON CORPORATION

Inventor： Yoichi Nakagomi ,  Junichi Suzuki

IPC: H05B41/36 ,  H05B41/392 ,  H04N9/31

CPC classification number: H05B41/3927 ,  H04N9/312 ,  H04N9/3155 ,  H04N9/3167 ,  H04N9/3197 ,  H05B41/16 ,  H05B41/382

Abstract: A discharge lamp driving device includes: a discharge lamp driving unit which supplies drive power to a discharge lamp; and a control unit which controls the discharge lamp driving unit according to a waveform of the drive power. The waveform has n launching periods and a low-power mode lighting period. The n launching periods include a first launching period in which the drive power increases toward refresh power that is equal to or above drive power in a low-power mode and equal to or below rated power, and (n−1) launching periods in which the drive power is maintained at the refresh power. The control unit, in an x-th launching period, supplies the discharge lamp with a drive current having a drive frequency equal to or below a drive frequency of a drive current supplied to the discharge lamp in an (x−1)th launching period.

Abstract translation: 放电灯驱动装置包括：放电灯驱动单元，其向放电灯提供驱动电力; 以及控制单元，其根据驱动力的波形控制放电灯驱动单元。 波形具有n个发射周期和低功率模式发光周期。 n个发射期包括驱动功率在低功率模式下等于或大于驱动功率并等于或低于额定功率的刷新功率增加的第一发射周期，以及（n-1）发射周期，其中 驱动功率保持在刷新功率。 所述控制单元在第x发射周期中向所述放电灯提供在（x-1）发射周期内具有等于或低于提供给所述放电灯的驱动电流的驱动频率的驱动频率的驱动电流 。

公开(公告)号：US09351384B2

公开(公告)日：2016-05-24

申请号：US14155758

申请日：2014-01-15

Applicant: SEIKO EPSON CORPORATION

Inventor： Junichi Suzuki

IPC: G03B21/20 ,  H05B41/38 ,  H05B41/292

CPC classification number: H05B41/38 ,  G03B21/2053 ,  H05B41/2928 ,  Y02B20/208

Abstract: A light source drive device includes a supply unit that supplies a high-frequency first drive signal and a second drive signal whose frequency is lower than a frequency of the first drive signal to a discharge lamp which has a pair of electrodes, and a control unit that controls the supply unit so that the second drive signal is supplied during a second period after the first drive signal is supplied during a first period and the second period is lengthened as a voltage between the pair of electrodes is increased. It is preferable that the second period be longer than two minutes.

Abstract translation: 光源驱动装置包括供给单元，该供给单元将频率低于第一驱动信号的频率的高频第一驱动信号和第二驱动信号提供给具有一对电极的放电灯，以及控制单元 其控制供应单元，使得在第一时段期间在第一驱动信号被提供之后的第二周期期间提供第二驱动信号，并且在所述一对电极之间的电压增加时，第二周期被延长。 优选第二期间长于2分钟。

公开(公告)号：US11150548B2

公开(公告)日：2021-10-19

申请号：US16549265

申请日：2019-08-23

Applicant: SEIKO EPSON CORPORATION

Inventor： Junichi Suzuki ,  Hidefumi Sakata ,  Takeshi Takezawa

IPC: G03B21/20

Abstract: A light source apparatus according to an aspect includes a light source that outputs first light and second light, wavelength converter that contains phosphor and converts first light into fluorescence, and a light combiner that combines second light with fluorescence and outputs the resultant combined light. Wavelength converter has a first end surface and a second end surface and a side surface. Light combiner has a first surface and a second surface and a third surface. First end surface of the wavelength converter faces the first surface of the light combiner. First light enters the wavelength converter via the side surface, and the fluorescence exits out of the wavelength converter via the first end surface. Fluorescence enters the light combiner via the first surface, the second light enters the light combiner via the third surface, and the combined light exits out of the light combiner via the second surface.

公开(公告)号：US11022869B2

公开(公告)日：2021-06-01

申请号：US16690537

申请日：2019-11-21

Applicant: SEIKO EPSON CORPORATION

Inventor： Hidefumi Sakata ,  Junichi Suzuki ,  Shingo Komiyama ,  Yuichiro Iwama

IPC: G03B21/20 ,  F21V8/00 ,  F21Y115/30

Abstract: A light source apparatus according to an aspect of the present disclosure includes a first light source that emits first light, a second light source that emits second light, a light guide that causes the first light emitted from the first light source to propagate, a wavelength converter containing a phosphor that emits fluorescence when excited with the second light emitted from the second light source, and a light combiner that combines the first light having exited out of the light guide with the fluorescence having exited out of the wavelength converter. The light guide and the wavelength converter are disposed side by side. The light guide has a first end section and a second end section. The wavelength converter has a third end section and a fourth end section. The first light enters the light guide via the first end section thereof.

公开(公告)号：US10925127B2

公开(公告)日：2021-02-16

申请号：US16135147

申请日：2018-09-19

Applicant: SEIKO EPSON CORPORATION

Inventor： Masaru Kono ,  Junichi Suzuki ,  Shun Sato ,  Yuichiro Iwama

IPC: H05B41/38 ,  G03B21/20 ,  H05B41/292 ,  H05B41/288 ,  H01J61/86

Abstract: A discharge lamp drive device includes a discharge lamp driver adapted to supply a drive current to a discharge lamp having a first electrode and a second electrode, a control section adapted to control the discharge lamp driver, and a storage section adapted to store a plurality of drive patterns of the drive current. The control section is adapted to select one drive pattern of the plurality of drive patterns based on machine learning, and execute the selected drive pattern.

公开(公告)号：US10568192B2

公开(公告)日：2020-02-18

申请号：US16229700

申请日：2018-12-21

Applicant: SEIKO EPSON CORPORATION

Inventor： Junichi Suzuki ,  Masaru Kono

IPC: G03B21/20 ,  H05B41/38 ,  H05B41/39 ,  H05B41/392 ,  H04N9/31 ,  H05B41/24 ,  H01J61/86 ,  H05B41/288

Abstract: A discharge lamp drive device includes a discharge lamp driver configured to supply drive electric current to a discharge lamp having a first electrode and a second electrode, a control unit configured to control the discharge lamp driver; and a storage unit configured to store a plurality of drive patterns of the drive electric current. The control unit is configured to select one drive pattern from among the plurality of drive patterns based on machine learning, and implement the selected drive pattern. The control unit is configured to adjust a drive electric power supplied to the discharge lamp based on illumination level information relating to an illumination level of the discharge lamp, while performing switching among the drive patterns based on the machine learning, in a case where an inter-electrode voltage of the discharge lamp is larger than a given voltage value.