Title:
LIGHT-EMITTING ELEMENT DRIVE DEVICE
Document Type and Number:
WIPO Patent Application WO/2022/153668
Kind Code:
A1
Abstract:
This light-emitting element drive device comprises connection terminals which are provided in a quantity corresponding to a plurality of channels and which are configured to be connectable to light-emitting units, and the device can supply drive current to the light-emitting units through the connection terminals for the respective channels. During a period in which drive current is not supplied to the light-emitting units, a detection process for detecting a specific abnormality is executed. The detection process includes: a first comparison process in which, when a pull-up current is supplied toward one of two connection terminals, the voltage of the other connection terminal is compared with a determination voltage; and a second comparison process in which, when the pull-up current is supplied toward the other connection terminal of the two connection terminals, the voltage of the one connection terminal is compared with the determination voltage.
Inventors:
SASAKI YOSHIKAZU (JP)
YAMADA KENJI (JP)
YAMADA KENJI (JP)
Application Number:
PCT/JP2021/042452
Publication Date:
July 21, 2022
Filing Date:
November 18, 2021
Export Citation:
Assignee:
ROHM CO LTD (JP)
International Classes:
H05B45/50
Foreign References:
| JP2017174755A | 2017-09-28 | |||
| JP2016109987A | 2016-06-20 | |||
| JP2012204075A | 2012-10-22 |
Attorney, Agent or Firm:
SANO PATENT OFFICE (JP)
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