Invention Grant
- Patent Title: LED driving device, lighting device, and vehicle-mounted display device
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Application No.: US17778525Application Date: 2020-09-29
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Publication No.: US12082319B2Publication Date: 2024-09-03
- Inventor: Ryosuke Kanemitsu , Koji Katsura
- Applicant: Rohm Co., Ltd.
- Applicant Address: JP Kyoto
- Assignee: Rohm Co., Ltd.
- Current Assignee: Rohm Co., Ltd.
- Current Assignee Address: JP Kyoto
- Agency: Fish & Richardson P.C.
- Priority: JP 19214181 2019.11.27
- International Application: PCT/JP2020/037019 2020.09.29
- International Announcement: WO2021/106360A 2021.06.03
- Date entered country: 2022-05-20
- Main IPC: H05B45/30
- IPC: H05B45/30 ; H05B45/10 ; H05B45/325 ; H05B45/345 ; H05B45/46
Abstract:
In an LED driving device, a DC-DC controller performs control such that the voltage at an LED terminal remains equal to a reference voltage, and a reference voltage generator generates the reference voltage such that it decreases as the set value of the LED current set by an LED current setter decreases.
Public/Granted literature
- US20230040250A1 LED DRIVING DEVICE, LIGHTING DEVICE, AND VEHICLE-MOUNTED DISPLAY DEVICE Public/Granted day:2023-02-09
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