发明名称 |
Current control circuit, LED current control apparatus, and light emitting apparatus |
摘要 |
A counter circuit increments a count value bit by bit in synchronization with a clock pulse received from an oscillating portion. A lower order decoder receives the count value output from the counter circuit, compares a bit or bits on a lower side with a set value 1, and outputs an H-level only in a time period when the bit or bits match a bit pattern of set value 1. Similarly, an upper order decoder compares a bit or bits on an upper side with a set value 2, and outputs an H-level only in a time period when the bit or bits match the bit pattern of set value 2. An AND circuit renders a transistor conductive in a time period when both lower and upper order decoders are outputting signals of the H-level.
|
申请公布号 |
US7659873(B2) |
申请公布日期 |
2010.02.09 |
申请号 |
US20060916492 |
申请日期 |
2006.06.23 |
申请人 |
ROHM CO., LTD. |
发明人 |
NAKAO SHIGEHARU;NAGAO KEI |
分类号 |
G09G3/32;H01L33/00;H05B41/16 |
主分类号 |
G09G3/32 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|