Electronic device, wireless power receiving apparatus, and display apparatus

• US 9,652,105 B2
• Filed: 03/21/2016
• Issued: 05/16/2017
• 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 DAVID
• Application Number:
  US15/076,090
• Publication Number:
  US 20160231840A1
• Time in Patent Office: 421 Days
• 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, the electronic device comprising:

a receiving coil configured to receive wireless power from a transmitting coil of a wireless power transmitter via a first frequency;

a rectifier configured to rectify the received wireless power and transfer the rectified power to a load disposed in the electronic device;

an electrode array configured to generate a detection signal in response to a touch input signal, wherein the detection signal includes a signal corresponding to a second frequency;

a filter configured to remove a noise signal from the detection signal, wherein the noise signal is generated due to the wireless power and includes a signal corresponding to the first frequency;

a controller configured to perform an operation, in response to the touch input signal, based on the filtered detection signal.

2. The electronic device of claim 1, wherein the electronic device is further comprising a signal generator and a signal detector,

wherein the signal generator is configured to generate the touch input signal used for detecting approach of an object,

wherein the electrode array further configured to receive the touch input signal and modulate the touch input signal according to the approach of the object,

wherein the signal detector is configured to detect the filtered detection signal from the filter.

3. The electronic device of claim 1, wherein the electrode array comprises:

a first electrode array arranged in a first direction to receive the touch input signal;

a second electrode array arranged in a second direction to output the modified touch input signal; and

a first switching part configured to sequentially apply the touch input signal generated from the signal generator to the first electrode array.

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

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

5. The electronic device of claim 1, wherein the electrode array 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 first frequency used for the wireless power transmission to remove a voltage induced into the resistive film.

6. The electronic device of claim 5, 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.

7. The electronic device of claim 6, wherein the LC circuit comprises:

first LC circuits connected to the first electrodes; and

second LC circuits connected to the second electrodes.

8. The electronic device of claim 6, 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.

9. The electronic device of claim 1, wherein the receiving coil 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.

10. The electronic device of claim 1, wherein the filter further configured to pass the signal corresponding to the second frequency, and

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

11. The electronic device of claim 1, wherein the electronic device is further 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 configured to receive the touch input signal through an input unit.

12. The electronic device of claim 5, wherein the LC circuit comprises at least an inductor and at least a capacitor, the inductor and the capacitor connected in series.

13. The electronic device of claim 5, wherein at least a portion of the LC circuit has a ground state.

14. The electronic device of claim 5, wherein the LC circuit has a zero impedance value at the first frequency used for the wireless power transmission.