Electromagnetic interference reduction apparatus

• US 8,643,999 B2
• Filed: 08/16/2011
• Issued: 02/04/2014
• Est. Priority Date: 08/17/2010
• Status: Expired due to Fees

• Current Assignee: Electronics and Telecommunications Research Institute
• Original Assignee: Electronics and Telecommunications Research Institute
• Inventors: Yeo, Soon Il
• Primary Examiner(s): Leja, Ronald W
• Application Number:
  US13/211,149
• Publication Number:
  US 20120044664A1
• Time in Patent Office: 903 Days
• Field of Search: 361/235
• US Class Current: 361/235
• CPC Class Codes: H05K 9/0081 Electromagnetic shielding materials, e.g. EMI, RFI shielding H05K9/0003 takes precedence
• CPC Class Codes: H10N 10/00 Thermoelectric devices comprising a junction of dissimilar materials, i.e. devices exhibiting Seebeck or Peltier effects integrated devices or assemblies of multiple devices H10N19/00

Abstract

Provided is an Electromagnetic Interference (EMI) reduction apparatus. The EMI reduction apparatus includes: an electromagnetic wave absorbing unit absorbing electromagnetic waves from an electromagnetic wave generator and converting the absorbed electromagnetic waves into thermal energy through thermal conversion and emitting the thermal energy; and a thermoelectric unit converting the emitted thermal energy into electric energy.

Claims

1. An Electromagnetic Interference (EMI) reduction apparatus comprising:

an electromagnetic wave absorbing unit absorbing electromagnetic waves from an electromagnetic wave generator and emitting thermal energy through thermal conversion; and

a thermoelectric unit converting the emitted thermal energy into electric energy.

2. The EMI reduction apparatus of claim 1, wherein the electromagnetic wave absorbing unit comprises a carbon or ferrite material.

3. The EMI reduction apparatus of claim 1, wherein the thermoelectric unit converts a heat from operation of the electromagnetic wave generator into the electric energy.

4. The EMI reduction apparatus of claim 1, wherein the thermoelectric unit contacts the electromagnetic wave absorbing unit and comprises a thermoelectric element using the Seebeck effect.

5. The EMI reduction apparatus of claim 1, further comprising a condensing unit storing the electric energy as cumulative charge.

6. The EMI reduction apparatus of claim 5, wherein the condensing unit is connected to the thermoelectric unit and comprises a capacitor cumulatively accumulating charge coming from the thermoelectric unit.

7. The EMI reduction apparatus of claim 5, further comprising a power management unit receiving a target signal and selectively outputting the accumulated charge as driving power in response to the target signal.

8. The EMI reduction apparatus of claim 7, wherein the power management unit comprises:

a control unit receiving the target signal and outputting a selecting signal corresponding to the target signal; and

a power selection unit selectively outputting the accumulated charge as the driving power in response to the selecting signal.

9. The EMI reduction apparatus of claim 8, wherein the power selection unit comprises a switch unit having both two inputs and one output.

10. The EMI reduction apparatus of claim 8, wherein the control unit comprises:

a sensing unit receiving a voltage of main power as the target signal and outputting a signal corresponding to the received voltage as a control signal; and

a selecting unit receiving the control signal and outputting “

high”

or “

low”

as the selecting signal in response to the control signal.