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公开(公告)号：US09642229B2
公开(公告)日：2017-05-02
申请号：US14257427
申请日：2014-04-21
发明人： Junichi Suzuki , Satoshi Kito
IPC分类号： H05B37/02 , H05B41/36 , H05B41/285 , G03B21/20
CPC分类号： H05B41/36 , G03B21/2026 , G03B21/206 , H05B41/2858
摘要： In at least one embodiment, a light source apparatus includes a discharge lamp with a pair of electrodes and a driving unit that supplies a driving current to the pair of electrodes. The driving unit includes an AC supplier that supplies an alternating current to the pair of electrodes and a DC supplier that supplies a direct current to the pair of electrodes. The AC supplier is configured to alternately repeat an AC supply section in which the alternating current is supplied and an AC stop section in which the supply of the alternating current is stopped. The DC supplier is configured to supply the direct current during a period corresponding to the AC stop section. A frequency of the direct current is not lower than 10 Hz and not higher than 1 kHz.
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公开(公告)号：US09632398B2
公开(公告)日：2017-04-25
申请号：US14543148
申请日：2014-11-17
发明人： Satoshi Kito
IPC分类号： H05B37/02 , G03B21/00 , G03B21/20 , H05B41/292
CPC分类号： G03B21/006 , G03B21/2026 , G03B21/2053 , H05B41/2928 , Y02B20/208
摘要： A discharge lamp driving device includes a discharge lamp driving section configured to supply a driving current to a discharge lamp, the driving current being an alternating current for driving the discharge lamp, and a control section configured to control the discharge lamp driving section. The control section controls the discharge lamp driving section such that the driving current having a driving frequency different from a natural frequency of the discharge lamp and a frequency of 1/2n (n is a natural number) times the natural frequency is supplied to the discharge lamp.
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公开(公告)号：US11279871B2
公开(公告)日：2022-03-22
申请号：US16934070
申请日：2020-07-21
发明人： Satoshi Kito , Osamu Arakawa
摘要： A ceramic composite according to the present disclosure has a phosphor phase containing an activator and a phosphor and a matrix phase containing MgO as a light transmissive ceramic material. The ceramic composite is made of an inorganic material, and the content of the phosphor phase is so set that the volume ratio of the phosphor phase to the entire phase including the matrix phase and the phosphor phase is lower than or equal to 20 vol %.
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4.发明授权公开(公告)号：US10725307B2
公开(公告)日：2020-07-28
申请号：US16162917
申请日：2018-10-17
发明人： Satoshi Kito
IPC分类号： G02B26/00 , G02B27/10 , F21S10/00 , F21S10/02 , G03B33/08 , G03B21/00 , G03B21/20 , F21V9/40
摘要： A wavelength conversion element includes a substrate having a first surface, a first phosphor layer that has a first excitation light incident surface on which excitation light having a first wavelength is incident, is so provided as to face the first surface, a second phosphor layer that is so provided as to be in contact with part of the first excitation light incident surface, and a reflection layer that is provided between the first phosphor layer and the substrate. The first phosphor layer has an annular shape. The area of the second phosphor layer viewed in the direction in which the excitation light is incident is smaller than the area of the first phosphor layer viewed in the direction in which the excitation light is incident. The thickness of the second phosphor layer is smaller than the thickness of the first phosphor layer.
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公开(公告)号：US09915862B2
公开(公告)日：2018-03-13
申请号：US15407553
申请日：2017-01-17
发明人： Satoshi Kito , Shun Sato
IPC分类号： G03B21/14 , G03B21/20 , G03B21/00 , H05B41/36 , H05B41/288
CPC分类号： G03B21/2053 , G03B21/006 , G03B21/2026 , H05B41/2887 , H05B41/36
摘要： In a discharge lamp driving device, a mixed period is provided, in which a first period in which an alternating current is supplied and a second period in which a direct current is supplied are alternately repeated and a third period alternately including a first direct current period and a second direct current period in which a direct current having a polarity opposite to a polarity of the direct current in the first direct current period is supplied. Length of the second direct current period is smaller than 0.5 ms. A total of lengths of the first direct current periods in the third period is larger than length of the second period. The third period is not provided at least when the inter-electrode voltage is smaller than a first predetermined value or when a cumulative lighting time of the discharge lamp is smaller than a second predetermined value.
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公开(公告)号：US09971233B2
公开(公告)日：2018-05-15
申请号：US15065263
申请日：2016-03-09
发明人： Satoshi Kito
CPC分类号： G03B21/16 , G03B21/2026 , G03B21/2053
摘要： A projector according to an aspect of the invention includes a discharge lamp having a light emitting tube and configured to emit light, a light modulation device configured to modulate the light emitted from the discharge lamp in accordance with an image signal, a projection optical system configured to project the light modulated by the light modulation device, a first detection section configured to detect ultraviolet light out of the light emitted from the discharge lamp, and a control section configured to determine a deterioration state of the light emitting tube based on a light intensity of the ultraviolet light detected by the first detection section.
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公开(公告)号：US09785041B2
公开(公告)日：2017-10-10
申请号：US15139022
申请日：2016-04-26
发明人： Shun Sato , Junichi Suzuki , Satoshi Kito
CPC分类号： G03B21/2053 , G03B21/006 , G03B21/2026 , H04N9/3155 , H04N9/317 , H04N9/3194 , H04N9/3197 , H05B41/2886 , H05B41/2887 , H05B41/38 , Y02B20/202
摘要： A discharge lamp driving device includes a discharge lamp driving unit configured to supply a driving current to a discharge lamp including electrodes, a controller configured to control the discharge lamp driving unit, and a voltage detection unit configured to detect an inter-electrode voltage of the discharge lamp, in which the controller controls the discharge lamp driving unit so that the driving current includes a hybrid period in which a first period for supplying an AC current with a first frequency to the discharge lamp and a second period for supplying a DC current to the discharge lamp are alternately repeated, in which the first frequency includes a plurality of different frequencies, and in which the controller changes the first frequency on the basis of at least one of the detected inter-electrode voltage and driving power supplied to the discharge lamp.
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公开(公告)号：US11762267B2
公开(公告)日：2023-09-19
申请号：US17580789
申请日：2022-01-21
发明人： Satoshi Kito
CPC分类号： G03B21/204 , G02B26/008 , H04N9/3161
摘要： A light source apparatus according to an aspect of the present disclosure includes an excitation light source that outputs excitation light, a ceramic phosphor that has a first surface and a second surface, converts in terms of wavelength part of the excitation light outputted from the excitation light source and incident via the first surface to generate fluorescence, and causes the fluorescence to exit via the second surface, and a substrate that supports the first surface of the ceramic phosphor. The excitation light outputted from the excitation light source is incident on an exposed portion of the first surface of the ceramic phosphor that is the portion exposed via the substrate. The distance in the exposed portion from an irradiated region irradiated with the excitation light to the substrate is 0.34 mm or greater.
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公开(公告)号：US20140226135A1
公开(公告)日：2014-08-14
申请号：US14257427
申请日：2014-04-21
发明人： Junichi Suzuki , Satoshi Kito
CPC分类号： H05B41/36 , G03B21/2026 , G03B21/206 , H05B41/2858
摘要： In at least one embodiment, a light source apparatus includes a discharge lamp with a pair of electrodes and a driving unit that supplies a driving current to the pair of electrodes. The driving unit includes an AC supplier that supplies an alternating current to the pair of electrodes and a DC supplier that supplies a direct current to the pair of electrodes. The AC supplier is configured to alternately repeat an AC supply section in which the alternating current is supplied and an AC stop section in which the supply of the alternating current is stopped. The DC supplier is configured to supply the direct current during a period corresponding to the AC stop section. A frequency of the direct current is not lower than 10 Hz and not higher than 1 kHz.
摘要翻译： 在至少一个实施例中，光源装置包括具有一对电极的放电灯和向一对电极提供驱动电流的驱动单元。 驱动单元包括向该对电极提供交流电的AC供应器和向该对电极提供直流电的DC供应器。 AC供给器被配置为交替地重复提供交流电的AC供电部和停止供给交流电的AC停止部。 DC供应器被配置为在对应于AC停止部分的时段期间提供直流电流。 直流电流的频率不低于10Hz，不高于1kHz。
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公开(公告)号：US10712649B2
公开(公告)日：2020-07-14
申请号：US16366027
申请日：2019-03-27
发明人： Satoshi Kito
摘要： A light source apparatus according to an aspect of the invention includes an excitation light source that emits excitation light, a wavelength conversion layer on which the excitation light is incident and which converts the wavelength of the excitation light to emit fluorescence, a plurality of traveling direction changers that are formed in the wavelength conversion layer and change the traveling direction of the fluorescence, and a substrate on which the wavelength conversion layer is provided. The substrate is rotated around an axis of rotation to change the position on which the excitation light is incident on the wavelength conversion layer over time, and the interval between the plurality of traveling direction changers is smaller than the size of the region on which the excitation light is incident.
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