Title:
LED DRIVE DEVICE, LED LIGHT SOURCE DEVICE, AND ONBOARD DISPLAY DEVICE
Document Type and Number:
WIPO Patent Application WO/2022/249860
Kind Code:
A1
Abstract:
An LED drive device (30) has a plurality of LED terminals (LED1 terminal–LED6 terminal) for connecting the cathodes of LEDs (41–46) of a plurality of systems, a minimum voltage input terminal (MINSELIN terminal), a minimum voltage output terminal (MINSELOUT terminal), and a selector (10). When the minimum voltage input terminal is used, the selector selects the lowest voltage from among the voltages of the plurality of LED terminals and the voltage of the minimum voltage input terminal and causes the lowest voltage to be outputted from the minimum voltage output terminal. When the minimum voltage input terminal is not used, the selector selects the lowest voltage from among the voltages of the plurality of LED terminals and causes the lowest voltage to be outputted from the minimum voltage output terminal.
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Inventors:
KANEMITSU RYOSUKE (JP)
KATSURA KOJI (JP)
KATSURA KOJI (JP)
Application Number:
PCT/JP2022/019522
Publication Date:
December 01, 2022
Filing Date:
May 02, 2022
Export Citation:
Assignee:
ROHM CO LTD (JP)
International Classes:
H05B45/14; H01L33/00; H02M3/155; H05B45/325; H05B45/345; H05B45/38; H05B45/50; H05B47/14; H05B47/24; H05B47/25; H05B47/26
Domestic Patent References:
| WO2020071067A1 | 2020-04-09 |
Foreign References:
| US20100289424A1 | 2010-11-18 |
Attorney, Agent or Firm:
SANO PATENT OFFICE (JP)
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