Power storage device

• US 7,714,535 B2
• Filed: 07/24/2007
• Issued: 05/11/2010
• Est. Priority Date: 07/28/2006
• Status: Expired due to Fees

• Current Assignee: Semiconductor Energy Laboratory Co., Ltd.
• Original Assignee: Semiconductor Energy Laboratory Co., Ltd.
• Inventors: Arai, Yasuyuki, Yamazaki, Shunpei
• Primary Examiner(s): TSO, EDWARD H
• Application Number:
  US11/878,350
• Publication Number:
  US 20080024091A1
• Time in Patent Office: 1,022 Days
• Field of Search: 320/107, 320/108, 320/166, 235/492
• US Class Current: 320/107
• CPC Class Codes: H01L 27/0629 in combination with diodes, or resistors, or capacitors
• CPC Class Codes: H01Q 1/36 Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewithH01Q1/08, H01Q1/14 take precedence
• CPC Class Codes: H01Q 1/38 formed by a conductive layer on an insulating support patch antennas H01Q9/0407; microstrip dipole antennas H01Q9/065; microstrip slot antennas H01Q13/106; transmission line microstrip antennas H01Q13/206; manufacturing reflecting surfaces using insulating material for supporting the reflecting surface H01Q15/142
• CPC Class Codes: H01Q 7/00 Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop
• CPC Class Codes: H01Q 9/285 Planar dipole H01Q9/065 takes precedence; patch antenna H01Q9/0407
• CPC Class Codes: H02J 50/005 Mechanical details of housing or structure aiming to accommodate the power transfer means, e.g. mechanical integration of coils, antennas or transducers into emitting or receiving devices
• CPC Class Codes: H02J 50/10 using inductive coupling
• CPC Class Codes: H02J 50/12 of the resonant type
• CPC Class Codes: H02J 50/27 characterised by the type of receiving antennas, e.g. rectennas

Abstract

In the field of portable electronic devices in the future, portable electronic devices will be desired, which are smaller and more lightweight and can be used for a long time period by one-time charging, as apparent from provision of one-segment partial reception service “1-seg” of terrestrial digital broadcasting that covers the mobile objects such as a cellular phone. Therefore, the need for a power storage device is increased, which is small and lightweight and capable of being charged without receiving power from commercial power. The power storage device includes an antenna for receiving an electromagnetic wave, a capacitor for storing power, and a circuit for controlling store and supply of the power. When the antenna, the capacitor, and the control circuit are integrally formed and thinned, a structural body formed of ceramics or the like is partially used. A circuit for storing power of an electromagnetic wave received at the antenna in a capacitor and a control circuit for arbitrarily discharging the stored power are provided, whereby lifetime of the power storage device can be extended.

Claims

1. A power storage device comprising:

a first structural body having an antenna;

a power supply control circuit having a semiconductor layer interposed between an insulating layer over the semiconductor layer and an insulating layer below the semiconductor layer; and

a second structural body having a capacitor and a through electrode, the through electrode formed through the second structural body,

wherein the antenna and the power supply control circuit are connected with the through electrode, and

wherein the second structural body has higher rigidity than the first structural body.

6. A power storage device according to claim 1, wherein the capacitor has a structure in which a dielectric layer and a capacitor electrode are alternately stacked.

9. A power storage device according to claim 1, wherein the first structural body comprises a plastic sheet, a plastic film, a glass epoxy resin, a glass plate, paper, or a nonwoven fabric.

12. A power storage device according to claim 1, wherein the second structural body comprises a ceramic material.

15. A power storage device according to claim 1, wherein the power supply control circuit comprises a plurality of transistors.

2. A power storage device comprising:

a first structural body having an antenna;

a power supply control circuit having a semiconductor layer interposed between an insulating layer over the semiconductor layer and an insulating layer below the semiconductor layer, the power supply control circuit comprising a rectifier circuit, a switching circuit, a low-frequency signal generation circuit, and a power supply circuit; and

a second structural body having a capacitor and a through electrode, the through electrode formed through the second structural body,

wherein the antenna and the power supply control circuit are connected with the through electrode,

wherein the switching circuit controls power that is supplied from the capacitor or the antenna to the power supply circuit in accordance with a signal from the low-frequency signal generation circuit, and

wherein the second structural body has higher rigidity than the first structural body.

4. A power storage device according to claim 2, further comprising:

a control circuit in the power supply control circuit,

wherein the control circuit selects a signal from the capacitor when power supplied form the rectifier circuit is smaller than power supplied from the capacitor and the control circuit selects a signal from the rectifier circuit when the power supplied from the rectifier circuit is larger than the power supplied from the capacitor.

7. A power storage device according to claim 2, wherein the capacitor has a structure in which a dielectric layer and a capacitor electrode are alternately stacked.

10. A power storage device according to claim 2, wherein the first structural body comprises a plastic sheet, a plastic film, a glass epoxy resin, a glass plate, paper, or a nonwoven fabric.

13. A power storage device according to claim 2, wherein the second structural body comprises a ceramic material.

16. A power storage device according to claim 2, wherein the power supply control circuit comprises a plurality of transistors.

3. A power storage device comprising:

a first structural body having an antenna;

a second structural body having a capacitor and higher rigidity than the first structural body; and

a power supply control circuit having a first connection electrode for connecting with the antenna and a second connection electrode for connecting with the capacitor, the power supply control circuit interposed between the first structural body and the second structural body,

wherein the power supply control circuit comprises a rectifier circuit, a switching circuit, a low-frequency signal generation circuit, and a power supply circuit, and

wherein the switching circuit controls power that is supplied from the capacitor or the antenna to the power supply circuit in accordance with a signal from the low-frequency signal generation circuit.

5. A power storage device according to claim 3, further comprising:

a control circuit in the power supply control circuit,

wherein the control circuit selects a signal from the capacitor when power supplied form the rectifier circuit is smaller than power supplied from the capacitor and the control circuit selects a signal from the rectifier circuit when the power supplied from the rectifier circuit is larger than the power supplied from the capacitor.

8. A power storage device according to claim 3, wherein the capacitor has a structure in which a dielectric layer and a capacitor electrode are alternately stacked.

11. A power storage device according to claim 3, wherein the first structural body comprises a plastic sheet, a plastic film, a glass epoxy resin, a glass plate, paper, or a nonwoven fabric.

14. A power storage device according to claim 3, wherein the second structural body comprises a ceramic material.

17. A power storage device according to claim 3, wherein the power supply control circuit comprises a plurality of transistors.