Invention Grant
- Patent Title: Discharge lamp driver, light source apparatus, projector, and discharge lamp driving method
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Application No.: US15905136Application Date: 2018-02-26
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Publication No.: US10295894B2Publication Date: 2019-05-21
- Inventor: Shun Sato
- Applicant: SEIKO EPSON CORPORATION
- Applicant Address: JP Tokyo
- Assignee: SEIKO EPSON CORPORATION
- Current Assignee: SEIKO EPSON CORPORATION
- Current Assignee Address: JP Tokyo
- Agency: Oliff PLC
- Priority: JP2017-041845 20170306
- Main IPC: H05B41/288
- IPC: H05B41/288 ; G03B21/20 ; H04N9/31 ; G03B33/12 ; G03B21/00

Abstract:
In a discharge lamp driver, a control section is configured to alternately repeat a first period in which an AC current is supplied and a second period in which a DC current is supplied, and when a first drive power lower than a rated power of the discharge lamp is supplied and an accumulated lighting time of the discharge lamp is shorter than a predetermined time, the control section is configured to set the length of the first period to be greater than that in a case where the first drive power is supplied and the accumulated lighting time is equal to or longer than the predetermined time, and set the frequency of the AC current during the first period to be higher than that in the case where the first drive power is supplied and the accumulated lighting time is equal to or longer than the predetermined time.
Public/Granted literature
- US20180252994A1 DISCHARGE LAMP DRIVER, LIGHT SOURCE APPARATUS, PROJECTOR, AND DISCHARGE LAMP DRIVING METHOD Public/Granted day:2018-09-06
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