公开(公告)号：US20180144925A1

公开(公告)日：2018-05-24

申请号：US15571922

申请日：2016-11-14

Applicant: SHIKOH TECH LLC

Inventor： Tsutae SHINODA ,  Hitoshi HIRAKAWA ,  Kenji AWAMOTO ,  Junichiro TAKAHASHI ,  Takefumi HIDAKA

IPC: H01J65/04 ,  H05B41/24 ,  G21K5/02

CPC classification number: H01J65/04 ,  G21K5/02 ,  H01J65/00 ,  H05B41/24 ,  H05B41/2828

Abstract: During a normal operation,alternating drive voltage to be applied between a pair of electrodes provided to face an outer surface of a bottom part of a gas discharge light emitting tube is switched to a voltage value V2 lower than a voltage value V1 at the time of starting lighting. Further, the alternating drive voltage to be applied during the normal discharge operation is intermittently applied in a predetermined cycle and duty ratio to enable adjustment of light emission intensity.

公开(公告)号：US20170186596A1

公开(公告)日：2017-06-29

申请号：US15308802

申请日：2016-01-29

Applicant: SHIKOH TECH LLC

Inventor： Tsutae SHINODA ,  Hitoshi HIRAKAWA ,  Kenji AWAMOTO ,  Bingang GUO ,  Takefumi HIDAKA ,  Junichiro TAKAHASHI

IPC: H01J65/00 ,  H01J61/06 ,  H01J11/18 ,  H05B41/24 ,  H01J61/42 ,  H01J61/30

CPC classification number: H01J65/00 ,  H01J11/18 ,  H01J61/06 ,  H01J61/305 ,  H01J61/42 ,  H01J63/08 ,  H05B41/24

Abstract: The object of this invention is to provide a gas discharge device which has a simple configuration, inexpensive, and has excellent luminous efficiency, for an ultraviolet or visible light source.The invention provides a gas discharge device in which first and second long electrodes extending toward either side along a longitudinal direction with a discharge gap interposed therebetween are provided outside of a back side flat surface of a thin glass tube, the thin glass tube filled with a discharge gas having a front side flat surface and the back side flat surface facing each other on a transverse section, wherein, starting with trigger discharge that is initially generated in the discharge gap as a result of a voltage increase when a voltage with a sine waveform or an inclined waveform is applied between both electrodes, the discharge gradually extends so as to move in the longitudinal direction of the electrodes. Ultraviolet light having high luminous efficiency and emission intensity is obtained from the flat surface at the front surface side by forming an ultraviolet phosphor layer in the thin glass tube and driving the device with a sine-wave voltage.