ILLUMINATING APPARATUS AND CONTROL METHOD FOR KEEPING A CONSTANT TOTAL BRIGHTNESS OF AMBIENT LIGHT AND LIGHT PRODUCED BY THE ILLUMINATING APPARATUS
First Claim
1. An illuminating apparatus comprising:
- a lamp;
an optical sensor generating a detection signal according to an ambient brightness; and
a control module electrically connected to the lamp and the optical sensor and storing an objective brightness and an objective current value, wherein the control module receives the detection signal to acquire the ambient brightness, compares the objective brightness with the ambient brightness to acquire a comparison result, calculates a ratio of the comparison result to the objective brightness, calculates a driving current value according to a product of multiplying the ratio and the objective current value, and generates a driving current based on the driving current value to activate the lamp.
2 Assignments
0 Petitions
Accused Products
Abstract
An illuminating apparatus and control method is adapted to keep a constant total brightness of the ambient light and light produced by the illuminating apparatus. The illuminating apparatus has a control module storing an objective brightness and detect the ambient brightness through an optical sensor. The control module turns on a lamp according to a comparison result of the objective brightness and the ambient brightness. Hence, a total brightness of the lamp'"'"'s brightness and the ambient brightness is adjustable to be equally bright as the objective brightness. The illuminating apparatus of the invention does not provide excessive brightness and accordingly conserves electric power energy.
-
Citations
9 Claims
-
1. An illuminating apparatus comprising:
-
a lamp; an optical sensor generating a detection signal according to an ambient brightness; and a control module electrically connected to the lamp and the optical sensor and storing an objective brightness and an objective current value, wherein the control module receives the detection signal to acquire the ambient brightness, compares the objective brightness with the ambient brightness to acquire a comparison result, calculates a ratio of the comparison result to the objective brightness, calculates a driving current value according to a product of multiplying the ratio and the objective current value, and generates a driving current based on the driving current value to activate the lamp. - View Dependent Claims (2, 3, 4, 5, 6, 7)
-
-
8. A method for automatically adjusting brightness, the method being executable by a controller comprising the steps of:
-
setting an objective brightness and an objective current value to a controller; receiving a detection signal corresponding to an ambient brightness from an optical sensor; acquiring a comparison result of the objective brightness and the ambient brightness; calculating a ratio of the comparison result to the objective brightness; calculating a driving current value according to a product of multiplying the ratio and the objective current value; and outputting a driving current according to the driving current value to a lamp. - View Dependent Claims (9)
-
Specification