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.
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申请公布号 |
US2009115347(A1) |
申请公布日期 |
2009.05.07 |
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 |
H05B41/36;H01L33/00;H02J1/00 |
主分类号 |
H05B41/36 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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