Illuminated electronic cigarette

1. An electronic smoking device comprising:

a first housing containing a battery, an air flow sensor, a plurality of LEDs, a light guide, and a flex circuit electrically connected to the battery and to a circuit board;

a second housing connectable to the first housing, the second housing containing a heating coil wrapped around a wick, the wick having first and second ends abutting or extending into a liquid supply, and a central aerosol passage extending though the liquid supply, and

the light guide directing light from the LEDs at a first end of the electronic smoking device, the plurality of LEDs at a first side of the first housing.

2. The electronic smoking of claim 1 further comprising a subassembly housing supporting the LEDS and the circuit board.

3. The electronic smoking of claim 2 wherein the subassembly housing is insertable from an end of the first housing.

4. The electronic smoking of claim 1 having 4 LEDs.

5. The electronic smoking of claim 1 having 5 LEDs.

6. The electronic smoking of claim 1 having multi-colored LEDs.

7. The electronic smoking of claim 1 wherein the LEDs have an illumination pattern which indicates charging, user draw strength, or low battery charge.

8. The electronic smoking of claim 1 wherein the first housing is connected to the second housing by a friction push fit, a snap fit, a bayonet attachment, a magnetic fit and/or screw threads.

9. The electronic smoking of claim 1 wherein the air flow sensor is a microphone switch with a deformable membrane, a Hall element, and/or an electromechanical sensor.

10. The electronic smoking of claim 1 wherein the first housing has a first end and a second end and the airflow sensor is at the second end of the first housing.

11. The electronic smoking device of claim 1 wherein the flex circuit overlies the battery and is parallel to a longitudinal axis of the battery.

12. An electronic smoking device comprising:

a first housing containing a circuit board having control circuitry electrically connected to a battery, to an air flow sensor, and to a plurality of LEDs at a first side of the housing;

a light guide at a first end of the first housing, the light guide adapted to guide light from the LEDs;

a second housing connectable to the first housing, the second housing containing, a heating coil wrapped around a wick, the wick having first and second ends abutting or extending into a liquid supply containing a liquid, and an aerosol passage though the liquid supply.

13. The electronic smoking device of claim 12 wherein the control circuitry is electrically connected to the battery by a flex circuit.

14. The electronic smoking device of claim 12 wherein the heating coil is wound about an axis perpendicular to a longitudinal axis of the electronic smoking device.

15. The electronic smoking device of claim 13 wherein the flex circuit overlies the battery and is parallel to a longitudinal axis of the battery.

16. An electronic smoking device, comprising:

a power supply portion removably attached to an atomizer/liquid reservoir portion;

the power supply portion containing a circuit board electrically connected to a battery by a flex circuit, the circuit board also electrically connected to an air flow sensor, and to a plurality of LEDs;

a light guide in the power supply portion positioned to guide light from the plurality of LEDs;

the atomizer/liquid reservoir portion containing a heating coil wound around a wick, the heating coil on an axis perpendicular to a longitudinal axis of the electronic smoking device;

the wick having first and second ends abutting or extending into a liquid reservoir of the atomizer/liquid reservoir, the liquid reservoir containing a liquid; and

an aerosol passage though the liquid reservoir.

17. The electronic smoking device of claim 16 wherein the flex circuit overlies the battery and is parallel to a longitudinal axis of the battery.

18. The electronic smoking device of claim 17 wherein the plurality of LEDs are on a first side of the power supply portion.