Display device and wireless power transmission system

• US 9,125,280 B2
• Filed: 06/05/2013
• Issued: 09/01/2015
• Est. Priority Date: 10/30/2012
• Status: Active Grant

• Current Assignee: AU Optronics Corporation
• Original Assignee: AU Optronics Corporation
• Inventors: Lee, Tsung-Shiun, Liu, Jia-Wei, Lin, Huang-Ti, Li, Yueh-Han
• Primary Examiner(s): Cole, Brandon S
• Application Number:
  US13/910,208
• Publication Number:
  US 20140117869A1
• Time in Patent Office: 818 Days
• Field of Search: 315209-226
• US Class Current: 1/1
• CPC Class Codes: G09G 2330/02 Details of power systems and of start or stop of display operation
• CPC Class Codes: G09G 2370/16 Use of wireless transmission of display information
• CPC Class Codes: G09G 5/003 Details of a display terminal, the details relating to the control arrangement of the display terminal and to the interfaces thereto specific for a CRT G09G1/165; for a flat panel G09G3/2092
• CPC Class Codes: H05B 41/24 in which the lamp is fed by high frequency ac, or with separate oscillator frequencyH05B41/26 takes precedence
• CPC Class Codes: H05B 47/19 via wireless transmission

Abstract

A display device with wireless power supply from power transmission means is disclosed in the disclosure. The display device comprises a display module, a system controlling module and a wireless power receiving module. The system controlling module is electrically connected to the display module. The wireless power receiving module is electrically connected to the system controlling module. The wireless power receiving module comprises a plurality of near-field coil units. The near-field coil units have individual receiving frequencies and individual output powers. The near-field coil units are configured to resonate with a transmission coil of the power transmission means. According to a transmission frequency on the transmission coil, the near-field coil unit with corresponding receiving frequency generates an electricity supply with a certain output power to the system controlling module. In addition, a wireless power transmission system is also disclosed herein.

Claims

1. A display device with wireless power supply from power transmission means, the display device comprising:

a display module;

a system controlling module, electrically connected to the display module; and

a wireless power receiving module, electrically connected to the system controlling module, the wireless power receiving module comprising;

a plurality of near-field coil units, wherein each of the near-field coil units have an individual receiving frequency and an individual output power, the near-field coil units are configured to resonate with a transmission coil of the power transmission means, and according to a transmission frequency on the transmission coil, the near-field coil unit with the corresponding receiving frequency generates an electricity supply with the corresponding output power to the system controlling module.

2. The display device of claim 1, wherein each of the near-field coil units comprises a near-field coil and a capacitor connected in parallel to the near-field coil.

3. The display device of claim 2, wherein the near-field coils of the near-field coil units are parallel to each other and are spaced, overlapped, arranged on the same axis or arranged adjacently on the same plane.

4. The display device of claim 2, wherein each of the near-field coils has an individual inductance value, so as to form the near-field coil units with individual output powers.

5. The display device of claim 2, wherein each of the capacitors has an individual capacitance value, so as to form the near-field coil units with individual receiving frequencies.

6. The display device of claim 1, wherein the near-field coil units comprise at least one first near-field coil unit and a second near-field coil unit, wherein each of the first near-field coil units has a first receiving frequency and a first output power, the second near-field coil unit has a second receiving frequency and a second output power, the first output power corresponds to an operation power of the display device and the second output power corresponds to a stand-by power of the display device.

7. The display device of claim 6, wherein the system controlling module comprises:

a system power conversion circuit, electrically connected to the at least one first near-field coil unit;

a remote control signal receiving circuit, configured to receive an external remote control instruction so as to switch the display device between an operation state and a stand-by state; and

a processing unit, electrically connected to the system power conversion circuit and the remote control signal receiving circuit, wherein according to the external remote control instruction received by the remote control signal receiving circuit the processing unit generates a control signal to the wireless power receiving module.

8. The display device of claim 7, wherein the wireless power receiving module comprises a controller which transmits a feedback signal to the power transmission means wirelessly according to the control signal generated by the processing unit so as to feed back and control the transmission frequency on the transmission coil.

9. The display device of claim 8, wherein under the stand-by state, the transmission frequency on the transmission coil corresponds to the second receiving frequency of the second near-field coil unit and the second near-field coil unit generates an electricity supply corresponding to the stand-by power to the controller, the remote control signal receiving circuit and the processing unit.

10. The display device of claim 8, wherein under the operation state, the transmission frequency on the transmission coil corresponds to the first receiving frequency of one of the first near-field coil units, and the first near-field coil unit generates an electricity supply corresponding to the operation power to the system power conversion circuit, so that the system power conversion circuit generates a system voltage signal to supply power to the controller, the remote control signal receiving circuit, the processing unit and the display module.

11. A wireless power transmission system, comprising:

power transmission means, comprising a transmission coil and a frequency control module which is configured to adjust a transmission frequency on the transmission coil; and

a display device, comprising;

a display module;

a system controlling module, electrically connected to the display module; and

a wireless power receiving module, electrically connected to the display module, wherein the wireless power receiving module comprises a plurality of near-field coil units, each of the near-field coil units has an individual receiving frequency and an individual output power, the near-field coil units comprise at least one first near-field coil unit and a second near-field coil unit, each of the first near-field coil units has a first receiving frequency and a first output power corresponding to an operation power of the display device, the second near-field coil unit has a second receiving frequency and a second output power corresponding to a stand-by power of the display device, the near-field coil units are configured to resonate with the transmission coil of the power transmission means, according to the transmission frequency on the transmission coil the first near-field coil unit or the second near-field coil unit with the corresponding frequency generates an electricity supply corresponding to the operation power or the stand-by power to the system controlling module, and the wireless power receiving module feeds back and controls the transmission frequency on the power transmission means to make the display device operate with the operation power or the stand-by power.

12. The wireless power transmission system of claim 11, wherein the frequency control module comprises a switching circuit coupled with the transmission coil, the switching circuit comprises a plurality of switching units which are switched in an order and the frequency control module adjusts a switching frequency of the switching units to adjust the transmission frequency on the transmission coil.

13. The wireless power transmission system of claim 12, wherein the switching circuit is a full-bridge inversion switching circuit.

14. The wireless power transmission system of claim 11, wherein each of the near-field coil units comprises a near-field coil and a capacitor which is connected in parallel to the near-field coil.

15. The wireless power transmission system of claim 14, wherein the near-field coils have individual inductance values, so as to form the near-field coil units with individual output powers.

16. The wireless power transmission system of claim 15, wherein the capacitors have individual capacitance values, so as to form the near-field coil units with individual receiving frequencies.

17. The wireless power transmission system of claim 11, wherein the system controlling module comprises:

a system power conversion circuit, electrically connected to the at least one first near-field coil unit;

a remote control signal receiving circuit, configured to receive an external remote control instruction so as to switch the display device between an operation state and a stand-by state; and

a processing unit, electrically connected to the system power conversion circuit and the remote control signal receiving circuit, wherein according to the external remote control instruction received by the remote control signal receiving circuit the processing unit generates a control signal to the wireless power receiving module.

18. The wireless power transmission system of claim 17, wherein the wireless power receiving module comprises a controller which transmits a feedback signal to the power transmission means wirelessly according to the control signal generated by the processing unit so as to feed back and control the transmission frequency on the transmission coil.

19. The wireless power transmission system of claim 18, wherein under the stand-by state, the transmission frequency on the transmission coil corresponds to the second receiving frequency of the second near-field coil unit and the second near-field coil unit generates an electricity supply corresponding to the stand-by power to the controller, the remote control signal receiving circuit and the processing unit.

20. The wireless power transmission system of claim 18, wherein under the operation state, the transmission frequency on the transmission coil corresponds to the first receiving frequency of one of the first near-field coil units, and the near-field coil unit generates an electricity supply corresponding to the operation power to the system power conversion circuit so that the system power conversion circuit generates a system voltage signal to supply power to the controller, the remote control signal receiving circuit, the processing unit and the display module.