发明名称 |
SLOW ACTING PHOTO LAMP CONTROL |
摘要 |
<p>CBP-7169 SLOW ACTING PHOTO LAMP CONTROL A room lighting control system which controls the electrical power supplied to the artificial lighting in an area based on the ambient light available. A photocell controlled digital lamp dimming circuit with particularly high stability for time and temperature is combined with a slow response time to avoid short term adjustments. A digital counter is used to determine a large number of steps over the adjustment range and the driving clock operates at a very low frequency, so that changes in light level take a relatively long time, and it takes an exceptionally long time to span the entire adjustment range.</p> |
申请公布号 |
CA1265841(A) |
申请公布日期 |
1990.02.13 |
申请号 |
CA19870542966 |
申请日期 |
1987.07.24 |
申请人 |
ARMSTRONG WORLD INDUSTRIES, INC. |
发明人 |
HOFFER, ROY D. |
分类号 |
H05B39/04;(IPC1-7):H05B37/02 |
主分类号 |
H05B39/04 |
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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