ELECTRONIC DEVICE CAPABLE OF DETECTING THE TIMING FOR REPLACING A FILTER

• US 20080110345A1
• Filed: 10/22/2007
• Published: 05/15/2008
• Est. Priority Date: 11/09/2006
• Status: Abandoned Application

• Current Assignee: BenQ Corporation (Qisda Corporation), Qisda Corporation
• Original Assignee: BenQ Corporation (Qisda Corporation), Qisda Corporation
• Inventors: Shen, Chun-Ming, Chen, Chieh-Fu, Yang, Shun-Chieh
• Application Number:
  US11/875,956
• Publication Number:
  US 20080110345A1
• Time in Patent Office: Days
• US Class Current: 96/418
• CPC Class Codes: B01D 46/0086 Filter condition indicators

Abstract

An electronic device includes a housing comprising a vent, and a filter installed nearby the vent. The filter includes a first filter section made of a first material, and a second filter section made of a second material. The first material has better uniformity than the second material. The electronic device further includes a light emitter for emitting a light signal to the first filter section, a light receiver for receiving the light signal emitted from the light emitter, and a control unit electrically connected to the light receiver for operating the electronic device according to a receiving result of the light signal received by the light receiver.

Claims

1. An electronic device comprising:

a housing comprising a vent;

a filter installed nearby the vent, the filter comprising;

a first filter section made of a first material; and

a second filter section made of a second material, the first material having better uniformity than the second material;

a light emitter for emitting a light signal to the first filter section;

a light receiver for receiving the light signal emitted from the light emitter; and

a control unit electrically connected to the light receiver for operating the electronic device according to a receiving result of the light signal received by the light receiver.

2. The electronic device of claim 1 wherein the control unit generates an operation signal when the receiving result is less than a predetermined value.

3. The electronic device of claim 2 further comprising a fan module electrically connected to the control module and the fan module receives the operation signal to increase a rotational speed of the fan module.

4. The electronic device of claim 2 further comprising a warning interface electrically connected to the control module and the warning interface receives the operation signal to present a warning message.

5. The electronic device of claim 4 wherein the warning interface is an illuminant.

6. The electronic device of claim 4 wherein the warning interface is a speaker.

7. The electronic device of claim 1 wherein the first material has better meshed uniformity than the second material.

8. The electronic device of claim 1 wherein the first material has better thickness uniformity than the second material.

9. The electronic device of claim 1 wherein the first material is metal mesh or plastic mesh.

10. The electronic device of claim 1 wherein the second material is a sponge.

11. The electronic device of claim 1 wherein the first filter section is disposed between the light emitter and the light receiver.

12. The electronic device of claim 1 further comprising a reflector installed on a first side of the first filter section wherein the light emitter and the light receiver are disposed on a second side of the first filter section and the reflector reflects the light signal emitted from the light emitter to the light receiver.

13. The electronic device of claim 12 wherein the reflector is made of tinfoil.

14. A filter device comprising:

a filter comprising;

a first filter section made of a first material; and

a second filter section made of a second material, the first material having better uniformity than second material;

a light emitter for emitting a light signal to the first filter section; and

a light receiver for receiving the light signal emitted from the light emitter.

15. The filter device of claim 14 wherein the first material has better meshed uniformity than second material.

16. The filter device of claim 14 wherein the first material has better thickness uniformity than second material.

17. The filter device of claim 14 wherein the first material is metal mesh or plastic mesh.

18. The filter device of claim 14 wherein the first filter section is disposed between the light emitter and the light receiver.

19. The filter device of claim 14 further comprising a reflector installed on a first side of the first filter section wherein the light emitter and the light receiver are disposed on a second side of the first filter section and the reflector reflects the light signal emitted from the light emitter to the light receiver.

20. The filter device of claim 19 wherein the reflector is made of tinfoil.