| 20090040747 | KEYBOARD WITH LIGHTING CIRCUIT - An exemplary keyboard includes at least one lighting circuit and a keypad mounted on the keyboard. The lighting circuit comprises a power source, at least one light emitting diode (LED), and a regulating resistor. The regulating resistor includes an adjustment terminal connected to the power source and a connection terminal connected to the anode of the LED. The cathode of the LED is grounded. The keypad is illuminated by the lighting circuit arranged therein. Therefore, users can adjust illumination of different parts of the keyboard by adjusting the regulating resistors of the lighting circuits arranged therein. | 02-12-2009 |
