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Electronic device and control method for the same

Imported: 23 Feb '17 | Published: 22 Oct '02

Ichiro Aoshima, Motomu Hayakawa, Tsukasa Kosuda, Katsuyuki Honda

USPTO - Utility Patents

Abstract

In an electronic device in which a charge path to a secondary battery and a signal path to a reception device are partially shared and a receiving-time current due to the reception is made to be a charging current for the secondary battery, even in a case in which the voltage across the secondary battery is close to a maximum voltage, by bypassing the charging current due to the signal reception, the voltage across the secondary battery is controlled so as not to exceed the maximum voltage.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a plan view showing constructions of a station and an electronic watch according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view showing the constructions of the station and the electronic watch according to an embodiment of the present invention.

FIG. 3 is a general construction block diagram of main components of the electronic watch in FIG.

1.

FIG. 4 is a diagram illustrating the charging voltage across a secondary battery.

FIG. 5 is a diagram illustrating the operating principle of the present invention.

FIG. 6 is a general construction block diagram of a charge current control circuit according to a second embodiment.

FIG. 7 is a diagram illustrating one example of a resistance unit.

FIG. 8 is a graph illustrating the relationship between a charging current and a battery voltage.

FIG. 9 consists of diagrams illustrating control period instruction data.

FIG. 10 is a diagram illustrating advantages of the second embodiment.

FIG. 11 is a diagram illustrating a modified example of the second embodiment.

FIG. 12 is a graph illustrating operation of a third embodiment.

FIG. 13 is a diagram illustrating operation of a fourth embodiment.

FIG. 14 is a diagram illustrating operation of a fifth embodiment.

FIG. 15 is a graph illustrating the relationship between normal battery voltage and communicating-time battery voltage.

FIG. 16 is a general construction block diagram of main components of an electronic watch of a fourth modified example of the embodiment.

FIG. 17 consists of diagrams illustrating a modified example of the second embodiment.

FIG. 18 is a diagram illustrating a modified example of the above-described embodiment.

Claims

1. An electronic device comprising:

2. An electronic device according to claim 1, characterized in that said charging-current-control device is provided with a charging-current-bypass device for bypassing a predetermined amount of said charging current away from said charge storage device.

3. An electronic device according to claim 2, characterized in that said charging-current-bypass device is provided with:

4. An electronic device according to claim 3, characterized in that said charging-current-control device further includes:

5. An electronic device according to claim 2, characterized in that said charging-current-bypass device is provided with:

6. An electronic device according to claim 5, characterized in that said charging-current-control device is provided with:

7. An electronic device according to claim 2, characterized in that said charging-current-bypass device is provided with:

8. An electronic device according to claim 7 characterized in that:

9. An electronic device according to claim 2, wherein said charging-current-bypass device includes a bypass switching device for forming a current-bypass path only when said reception device is receiving data signals.

10. An electronic device according to claim 1, characterized in that:

11. An electronic device according to claim 10, characterized in that said charging-current-control device terminates the control of said charging current upon completion of the data unit transfer initiated by said start bit signal.

12. An electronic device according to claim 1, characterized in that said charging-current-control device modifies its control of said charging current in accordance to one of multiple signal transfer modes received at said reception device, wherein each signal transfer mode is identified by the data transfer pattern of said data signals.

13. An electronic device according to claim 1, characterized in that:

14. An electronic device comprising:

15. An electronic device according to claim 14, wherein said return-data pattern is dependent on the data pattern of data signals received by said reception circuit.

16. An electronic device according to claim 15, wherein said data return device generates said return-data pattern to be identical to the data pattern of the received data signals.

17. An electronic device according to claim 15, characterized in that said data return device selects, as said return-data pattern, one of plurality of a predetermined data patterns based on the cumulative energy of the received data signals.

18. An electronic device according to claim 14, further including:

19. An electronic device according to claim 18, wherein:

20. An electronic device according to claim 14, characterized in that said energy balance control device wherein said return-data pattern is dependent on the received data; and wherein said energy balance control device further includes a discharging-current-control device for controlling the discharging current of said storage device when said return-data pattern is transmitted.

21. An electronic device according to claim 20, characterized in that said discharging-current-control device includes:

22. An electronic device according to claim 20, characterized in that said discharging-current-control device includes:

23. An electronic device comprising:

24. A control method for an electronic device including a charge storage device characterized by a predefined maximum voltage rating and effective for storing power transferred from outside said electronic device, and a reception circuit for receiving data signals from outside said electronic device, whereby reception of said data signals by said reception device causes charging of said charge storage device by using part of a signal path for conveying said data signals to said reception device as part of a charging path for conveying charging current to said charge storage device, said control method comprising: