Electronic device, wireless power receiving apparatus, and display apparatus

• US 9,310,932 B2
• Filed: 06/07/2012
• Issued: 04/12/2016
• Est. Priority Date: 06/08/2011
• Status: Active Grant

• Current Assignee: Nera Innovations Limited (Atlantic IP Services Limited)
• Original Assignee: LG Innotek Company Limited (LG Corporation)
• Inventors: Bae, Su Ho
• Primary Examiner(s): Pham, Viet
• Application Number:
  US14/125,015
• Publication Number:
  US 20140111475A1
• Time in Patent Office: 1,405 Days
• Field of Search: 345/173
• US Class Current: 1/1
• CPC Class Codes: G06F 1/26 Power supply means, e.g. regulation thereof for memories G11C
• CPC Class Codes: G06F 2203/04103 Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices
• CPC Class Codes: G06F 3/041 Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: G06F 3/0418 for error correction or compensation, e.g. based on parallax, calibration or alignment
• CPC Class Codes: G06F 3/04182 Filtering of noise external to the device and not generated by digitiser components
• CPC Class Codes: G06F 3/045 using resistive elements, e.g. a single continuous surface or two parallel surfaces put in contact
• CPC Class Codes: H02J 50/10 using inductive coupling
• CPC Class Codes: H02J 50/12 of the resonant type
• CPC Class Codes: H02J 50/80 involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices
• CPC Class Codes: H02J 7/0042 characterised by the mechanical construction
• CPC Class Codes: H04B 5/26 using coils
• CPC Class Codes: H04B 5/266 One coil at each side, e.g. with primary and secondary coils
• CPC Class Codes: H04B 5/79 for data transfer in combination with power transfer

Abstract

Disclosed are an electronic device, a wireless power reception apparatus, and a display device. The electronic device, which is equipped with a wireless power receiving apparatus to wirelessly receive power from a wireless power transmission apparatus, includes a signal receiving part to receive a signal required to operate the electronic device, and a wireless power signal removing part to remove a signal having a frequency used for wireless power transmission among signals received in the signal receiving part.

Claims

1. An electronic device equipped with a wireless power receiving apparatus to wirelessly receive power from a wireless power transmission apparatus, the electronic device comprising:

a signal receiving part to receive an operating signal required to operate the electronic device; and

a wireless power signal removing part to remove a power signal having a resonant frequency used for wireless power transmission from the operating signal;

wherein the wireless power signal removing part includes a filter and a signal detector,

wherein the filter removes the power signal having the resonant frequency used for the wireless power transmission and transmits an output signal to the signal detector, and

wherein the signal detector detects the operation signal based on the output signal in which the power signal having the resonant frequency used for the wireless power transmission is removed.

2. The electronic device of claim 1, wherein the operating signal comprises a touch signal detected by an input unit, and

wherein the filter removes the power signal having the resonant frequency used for the wireless power transmission from the touch signal.

10. The electronic device of claim 1, wherein the wireless power receiving apparatus receives power from the wireless power transmission apparatus by using electromagnetic induction.

11. The electronic device of claim 1, wherein the wireless power receiving apparatus comprises:

a first coil resonance-coupled with the wireless power transmission apparatus to receive power; and

a second coil inductive-coupled with the first coil to receive power.

3. An electronic device equipped with a wireless power receiving apparatus to wirelessly receive power from a wireless power transmission apparatus, the electronic device comprising:

a signal receiving part to receive an operating signal required to operate the electronic device; and

a wireless power signal removing part to remove a power signal having a resonant frequency used for wireless power transmission from the operating signal;

wherein the signal receiving part comprises;

a signal generator to generate a detection signal used for detecting approach of an object; and

an electrode array to receive the detection signal and modulate the detection signal according to the approach of the object; and

wherein the wireless power signal removing part comprises;

a filter to remove the power signal having the resonant frequency used for the wireless power transmission from the modulated detection signal;

a signal detector to detect the operating signal from the filter; and

a controller to perform an operation corresponding to the operating signal detected by the signal detector.

4. The electronic device of claim 3, wherein the electrode array comprises:

a first electrode array arranged in a first direction to receive the detection signal and a second electrode array arranged in a second direction to output the modified detection signal, and

wherein the signal receiving part further comprises;

a first switching part to sequentially apply the detection signal generated from the signal generator to the first electrode array.

5. The electronic device of claim 4, wherein the signal receiving part further comprises:

a second switching part to receive the detection signal output from the second electrode array and to transfer the detection signal to the filter.

6. The electronic device of claim 3, wherein the signal receiving part comprises a resistive film having two terminals equipped with electrodes, and

the filter comprises an LC circuit connected to the electrodes and shorted at the resonant frequency used for the wireless power transmission to remove a voltage induced into the resistive film.

7. The electronic device of claim 6, wherein the resistive film comprises:

a first resistive film having two terminals equipped with first electrodes; and

a second resistive film having two terminals equipped with second electrodes perpendicular to the first electrodes.

8. The electronic device of claim 7, wherein the LC circuit comprises:

first LC circuits connected to the first electrodes; and

second LC circuits connected to the second electrode.

9. The electronic device of claim 7, wherein at least one of the first and second resistive films includes a transparent electrode including at least one of ITO, IZO, ZnO and AZO, and a protective film to protect the resistive film, and

wherein the first and second resistive films are spaced apart from each other by a spacer.

18. The electronic device of claim 6, wherein the LC circuit comprises at least an inductor and at least a capacitor, the inductor and the capacitor connected in series.

19. The electronic device of claim 6, wherein at least a portion of the LC circuit has a ground state.

20. The electronic device of claim 6, wherein the LC circuit has a zero impedance value at the resonant frequency used for the wireless power transmission.

12. A wireless power receiving apparatus to wirelessly receive power from a wireless power transmission apparatus, the wireless power receiving apparatus comprising:

a receiving coil part to wirelessly receive power from the wireless power transmission apparatus; and

a signal detection part to operate by the received power and to detect a second signal obtained by removing a first signal having a first frequency,

wherein the first frequency is a resonant frequency of the power from the wireless power transmission apparatus;

wherein the signal detection part includes a filter and a signal detector,

wherein the filter removes the first signal having the resonant frequency of the power from the wireless power transmission apparatus and transmits the second signal to the signal detector, and

wherein the signal detector detects the second signal in which the first signal having the resonant frequency is moved.

13. The wireless power receiving apparatus of claim 12, wherein the first frequency is a frequency used for wireless power transmission.

14. The wireless power receiving apparatus of claim 12, wherein the filter passes the second signal having a second frequency and removes the first signal having the first frequency, and

the filter comprises at least one of a band pass filter, a band reject filter, a low pass filter, and a high pass filter.

15. The wireless power receiving apparatus of claim 12, wherein the receiving coil part receives power from the wireless power transmission apparatus by using electromagnetic induction.

16. The wireless power receiving apparatus of claim 12, wherein the receiving coil part comprises:

a receiving resonance coil resonance-coupled with a transmission resonance coil of the wireless power transmission apparatus to receive power; and

a receiving induction coil inductive-coupled with the receiving resonance coil to receive the power.

17. A display device comprising:

a display panel to display an image; and

a touch panel disposed on a front surface of the display panel and allowing selection of at least one function displayed on the display panel through a touch manipulation operation,

wherein the touch panel comprises;

a touch receiving part to receive a touch signal through an input unit;

a filter to remove a power signal having a resonant frequency used for wireless power transmission from the touch signal and to produce an output signal; and

a signal detector receiving the output signal,

wherein the power signal having the resonant frequency used for the wireless power transmission is removed in the output signal.