Laser pen, portable electronic device and laser indicating system

Patent metadata

Field	Value
Publication number	US-9632323-B2
Application number	US-201314144525-A
Country	US
Kind code	B2
Filing date	Dec 30, 2013
Priority date	Apr 23, 2013
Publication date	Apr 25, 2017
Grant date	Apr 25, 2017

Abstract

A laser pen includes a laser diode and a plug. The plug is received in an earphone jack of a portable electronic device. The laser pen obtains power from the portable electronic device to turn on the laser diode.

First claim

What is claimed is:

1. A portable electronic device, comprising:
an earphone jack; and
a power management microchip electronically connected to the earphone jack and comprising a detecting pin and a controlling pin; wherein the detecting pin is configured to detecting whether a plug of a laser pen is received in the earphone jack, when the detecting pin detects the plug of the laser pen received in the earphone jack, the controlling pin provides power to the laser pen through the earphone jack.

2. The portable electronic device of claim 1 , wherein the earphone jack comprises a ground pin, a microphone pin, a first channel pin, and a second channel pin, the detecting pin is electronically connected to the microphone pin, the controlling pin is electronically connected to the first channel pin, the second channel pin and the ground pin are both grounded.

3. The portable electronic device of claim 2 , wherein the power management microchip determines whether the plug of the laser pen is received in the earphone jack through a voltage of the microphone pin, when the power management microchip determines the plug of the laser pen is received in the earphone jack, the controlling pin outputs power to the laser pen through the first channel pin.

4. The portable electronic device of claim 2 , wherein the first channel pin is a left channel pin and the second channel pin is a right channel pin.

5. The portable electronic device of claim 2 , wherein the first channel pin is a right channel pin and the second channel pin is a left channel pin.

6. A laser indicating system, comprising:
a laser pen comprising a laser diode and a plug; and
a portable electronic device comprising an earphone jack and a power management microchip electronically connected to the earphone jack;
wherein the power management microchip comprises a detecting pin and a controlling pin, the detecting pin is configured to detect whether the plug of the laser pen is received in the earphone jack, when the detecting pin detects the plug of the laser pen is received in the earphone jack, the plug of the laser pen obtains power from the controlling pin to turn on the laser diode.

7. The laser indicating system of claim 6 , wherein the earphone jack comprises a ground pin, a microphone pin, a first channel pin, and a second channel pin; the plug of the laser pen comprises a first connecting contact, a second connecting contact, a third connecting contact, and a fourth connecting contact; when the plug of the laser pen is received in the earphone jack, the first connecting contact, the second connecting contact, the third connecting contact, and the fourth connecting contact are connected to the first channel pin, the second channel pin, the microphone pin, and the grounding pin, respectively.

8. The laser indicating system of claim 7 , wherein an anode of the laser diode is connected to the first connecting contact, a cathode of the laser diode is connected to the second connecting contact; the laser pen further comprises a resistor, an end of the resistor is electronically connected to the third connecting contact, and another end of the resistor is electronically connected to the fourth connecting contact.

9. The laser indicating system of claim 8 , wherein the detecting pin is electronically connected to the microphone pin and detects whether the plug of the laser pen is received in the earphone jack according to a voltage of the microphone pin.

10. The laser indicating system of claim 9 , wherein the controlling pin is connected to the first channel pin.

11. A portable electronic device, comprising:
an earphone jack; and
a power management microchip electronically connected to the earphone jack and comprising a detecting pin and a controlling pin; wherein the detecting pin is configured to detect whether a plug of a laser pen received in the earphone jack, when the detecting pin detects the plug of the laser pen received in the earphone jack, the controlling pin provides power to the laser pen through the earphone jack.

12. The portable electronic device of claim 11 , wherein the earphone jack comprises a ground pin, a microphone pin, a first channel pin, and a second channel pin, the detecting pin is electronically connected to the microphone pin, the controlling pin is electronically connected to the first channel pin, the second channel pin and the ground pin are both grounded.

13. The portable electronic device of claim 12 , wherein the power management microchip determines whether the plug of the laser pen is received in the earphone jack through a voltage of the microphone pin, when the power management microchip determines the plug of the laser pen is received in the earphone jack, the controlling pin outputs power to the laser pen through the first channel pin.

14. The portable electronic device of claim 12 , wherein the first channel pin is a left channel pin and the second channel pin is a right channel pin.

15. The portable electronic device of claim 12 , wherein the first channel pin is a right channel pin and the second channel pin is a left channel pin.

Assignees

• Chiun Mai Communication Systems Inc

Inventors

• Lin Po-Chou

Classifications

• G02B27/20 Primary

  for imaging minute objects, e.g. light-pointer · CPC title

• Y10T307/766

  Cross-Sectional Technologies · mapped topic