| 发明名称 |
APPARATUS FOR DRIVING LIGHT EMITTING DEVICE |
| 摘要 |
An apparatus for driving a light emitting device includes a constant current control circuit configured to control a current flowing through the light emitting device to be constant, and an extension circuit configured to generate a post-extending PWM signal obtained by extending a period of an input PWM signal having a first level. The constant current control circuit is turned on during the period of the post-extending PWM signal having the first level, and the constant current control circuit is turned off during a period of the post-extending PWM signal having a second level. |
| 申请公布号 |
US2017101052(A1) |
申请公布日期 |
2017.04.13 |
| 申请号 |
US201615285831 |
申请日期 |
2016.10.05 |
| 申请人 |
ROHM CO., LTD. |
发明人 |
Nagao Kei;Takahashi Toru;Takuma Toru |
| 分类号 |
B60Q3/04;H05B33/08 |
主分类号 |
B60Q3/04 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
1. An apparatus for driving a light emitting device, comprising:
a constant current control circuit configured to control a current flowing through the light emitting device to be constant; and an extension circuit configured to generate a post-extending PWM signal obtained by extending a period of the post-extending PWM signal having a first level, wherein the constant current control circuit is turned on during the period of the post-extending PWM signal having the first level, and the constant current control circuit is turned off during a period of the post-extending PWM signal having a second level. |
| 地址 |
Kyoto JP |
