| 摘要 |
<p>A lighting control device (10) for controlling electric power applied to a lamp (20) to control the lamp intensity. Such device comprises (i) a control switch (T) having a manually-manipulatable switch actuator (16) for controlling the closure of the switch; (ii) intensity-selecting means (R, L) for producing control signals representative of a desired increase or decrease in the lamp intensity, and (iii) a control unit (28), operatively coupled to said control switch and said intensity-selecting means, for causing the lamp intensity to fade from one steady-state level to another at a predetermined fade rate. According to a preferred embodiment, the intensity-selecting means (R, L) is independent of said control switch (T), and the control unit (28) is responsive to different types of switch closures of said control switch (T) to cause the power applied to the lamp to change level at different rates. According to another aspect of the invention, the control unit (28) is responsive to the intensity-selecting means (R, L) to store a preselected intensity level to which the lamp intensity will fade from a previous OFF condition in response to a closure of control switch (T), and indicator means (18) are provided for visually indicating said preselected intensity level.</p> |
