发明名称 |
Driving circuit of light emitting element, and light emitting device and electronic apparatus including the light emitting element |
摘要 |
A driving circuit for a light emitting element is disclosed. The driving circuit includes a DC-DC converter configured to generate a drive voltage between a first line and a second line; a current driver, configured to be connected to the light emitting element in series between the first line and the second line, configured to supply a drive current to the light emitting element; a protection resistor configured to be connected to the light emitting element in series between the first line and the current driver; and a controller configured to control the DC-DC converter such that a first detection voltage, which corresponds to a voltage between both ends of the current driver, approaches a predetermined reference voltage and perform a predetermined protection process if the drive voltage between the first line and the second line exceeds a predetermined first threshold voltage. |
申请公布号 |
US9089023(B2) |
申请公布日期 |
2015.07.21 |
申请号 |
US201414279541 |
申请日期 |
2014.05.16 |
申请人 |
ROHM CO., LTD. |
发明人 |
Kikuchi Hiroki;Hagino Junichi |
分类号 |
H05B37/02;H05B33/08;G02F1/1335 |
主分类号 |
H05B37/02 |
代理机构 |
Cantor Colburn LLP |
代理人 |
Cantor Colburn LLP |
主权项 |
1. A driving circuit for a light emitting element, comprising:
a DC-DC converter configured to generate a drive voltage between a first line and a second line; a current driver, configured to be connected to the light emitting element in series between the first line and the second line, configured to supply a drive current to the light emitting element; a protection resistor configured to be connected to the light emitting element in series between the first line and the current driver; and a controller configured to control the DC-DC converter such that a first detection voltage, which corresponds to a voltage between both ends of the current driver, approaches a predetermined reference voltage, and perform a predetermined protection process if the drive voltage between the first line and the second line exceeds a predetermined first threshold voltage. |
地址 |
JP |