INTERNAL ANTENNA OF DISPLAY

• US 20170033451A1
• Filed: 07/29/2016
• Published: 02/02/2017
• Est. Priority Date: 07/29/2015
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: LIM, Sang-Ho, KO, Seung-Tae, KIM, Yoon-Geon, HONG, Won-Bin
• Granted Patent: US 10,153,808 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H04B 5/26 using coils
• CPC Class Codes: H04B 5/43 Antennas
• CPC Class Codes: H04B 5/72 for local intradevice communication

Abstract

A power supply device for an internal antenna of a display is provided. The power supply device includes at least two coils configured to be separated by a predetermined interval and a power supply terminal of the at least two coils to connect the at least two coils in parallel. An integrated circuit (IC) includes the power supply terminal of the at least two coils connects the at least two coils in parallel and supplies a current to the at least two coils through the included power supply terminal. Phases of the current flowing in the at least two coils are the same due to the current supplied by the IC.

Claims

1. An internal antenna of a display, the internal antenna comprising:

at least two coils configured to be separated by a predetermined interval; and

an integrated circuit (IC) including a power supply terminal of the at least two coils to connect the at least two coils in parallel, the IC supplying current to the at least two coils through the included power supply terminal,

wherein phases of current flowing in the at least two coils are identical due to the current supplied by the IC.

2. The internal antenna of the display of claim 1, wherein an inductor is added in series to one of the at least two coils.

3. The internal antenna of the display of claim 1, wherein one of the at least two coils short-circuits with a metallic body in at least two predetermined points.

4. The internal antenna of the display of claim 1, wherein a connectivity antenna is disposed in a center area of the at least two coils and a line for connecting the connectivity antenna to a second IC for driving the connectivity antenna is drawn through an open space of the at least two coils configured to connect the power supply terminal

5. The internal antenna of the display of claim 4, wherein a segment point is formed in one of the at least two coils and the line for connecting the connectivity antenna and the IC for driving the connectivity antenna is drawn through the formed segment point.

6. The internal antenna of the display of claim 5, wherein the segment point comprises a plurality of gaps in at least one of the at least two coils.

7. The internal antenna of the display of claim 5, wherein a first line for connecting the second IC is drawn through the at least two coils at the open space configured to connect the power supply terminal and a second line for connecting the second IC is drawn through the segment point.

8. The internal antenna of the display of claim 1,

wherein each of the at least two coils has a substantially circular shape, and

wherein the at least two coils are configured in a stacked configuration with a same central axis.

9. The internal antenna of the display of claim 8, wherein each of the at least two coils has the substantially circular shape of a same radius.

10. The internal antenna of the display of claim 8,

wherein each of the at least two coils has the substantially circular shape of a different radius, and

wherein the different radius are configured to prevent frequency transforming by mutual capacitance.

11. The internal antenna of the display of claim 1, wherein a diode is provided between the IC and at least one of an input power supply terminal of the at least two coils and an output power supply terminal of the at least two coils.

12. The internal antenna of the display of claim 1,

wherein a first coil corresponding to one of the two coils has a torus shape, and a second coil corresponding to the other coil has a circular shape.

13. The internal antenna of the display of claim 12,

wherein the second coil is disposed substantially coaxially inside a center space of the first coil on a same plane.

14. The internal antenna of the display of claim 1,

wherein the at least two coils include a coil for near field communication (NFC) and a coil for magnetic secure transmission (MST).

15. The internal antenna of the display of claim 2,

wherein an inductance of the coil to which the inductor is added is identical to an inductance of the other coil.

16. An internal antenna of a display comprising:

a torus shaped first antenna;

a circular shaped second antenna disposed on a same plane on which the first antenna is disposed and disposed substantially coaxially inside a center space of the first antenna;

an integrated circuit (IC) that supplies driving currents of the first antenna and the second antenna; and

a first conductor that connects the IC with the first and second antennas to supply in parallel the driving currents supplied by the IC to a power supply terminal included in the first antenna and a power supply terminal included in the second antenna.

17. The internal antenna of the display of claim 16,

wherein a phase of the current flowing in the first antenna is identical to a phase of the current flowing in the second antenna due to the driving currents supplied by the IC.

18. The internal antenna of the display of claim 16, further comprising:

an inductor added to at least one of the first antenna and the second antenna;

a second conductor that connects at least one of the first antenna and the second antenna to a metallic body; and

at least one diode on the first conductor.

19. The internal antenna of the display of claim 16,

wherein the first antenna is an antenna for near field communication (NFC), and the second antenna is an antenna for magnetic secure transmission (MST).

20. The internal antenna of the display of claim 18, wherein an inductance of an antenna to which the inductor is added is identical to an inductance of the other antenna.