Electronic watch and electronic watch control method

• US 7,154,816 B2
• Filed: 09/25/2001
• Issued: 12/26/2006
• Est. Priority Date: 09/27/2000
• Status: Expired due to Term

• Current Assignee: Citizen Watch Co Limited (Citizen Electronics Company Limited)
• Original Assignee: Citizen Watch Co Limited (Citizen Electronics Company Limited)
• Inventors: Sase, Masahiro, Igarashi, Kiyotaka, Shimoda, Kenji
• Primary Examiner(s): Yan, Ren
• Assistant Examiner(s): Hinze, Leo T.
• Application Number:
  US10/343,637
• Publication Number:
  US 20040100870A1
• Time in Patent Office: 1,918 Days
• Field of Search: 368/64, 368/66, 368/203, 368/204, 368/80, 368/205
• US Class Current: 368/66
• CPC Class Codes: G04C 10/04 with means for indicating the condition of the power supply in general G01R31/36
• CPC Class Codes: G04G 19/12 Arrangements for reducing power consumption during storage

Abstract

An electronic timepiece (10) comprises time information generating unit (A) for generating time information, information generating unit for generating information (function information, warning information, etc.) other than the time information, and power-saving operation unit (D) for operating the electronic timepiece in a power-saving operation state entailing lower power consumption than in a normal operation state. The information generating unit or the power-saving operation unit (D) is operated preferentially.

Claims

1. An electronic timepiece comprising:

a time information generating unit for generating time information;

a non-time information generating unit for generating other information other than the time information;

a display unit capable of alternatively displaying said time information and/or the other information;

a power-saving operation unit for operating the electronic timepiece in a power-saving operation state entailing lower power consumption than in a normal operation state; and

a preferential operation selecting unit for changing priority sequence between said non-time information generating unit and said power-saving operation unit according to circumstances or a predetermined condition.

2. The electronic timepiece according to claim 1, wherein said information generating unit is function information generating unit for generating function information.

3. The electronic timepiece according to claim 1, wherein said information generating unit is warning information generating unit for generating warning information for prompting a predetermined warning.

4. The electronic timepiece according to claim 1, wherein at least a part of said display unit is composed of a digital display system or an analog display system.

5. The electronic timepiece according to claim 1, which further comprises a selecting unit for causing said preferential operation selecting unit to select the preferential operation, said selecting unit being adapted to cause said preferential operation selecting unit to select the preferential operation at the request of a user.

6. The electronic timepiece according to claim 1, wherein said power source unit includes a battery.

7. The electronic timepiece according to claim 1, wherein said power source unit comprises a power generating unit and accumulator unit to be charged by said power generating unit.

8. The electronic timepiece according to claim 7,

which further comprises a residual capacity detecting unit for detecting the residual capacity of said accumulator unit,

wherein said preferential operation selecting unit, based on residual capacity detection information from said residual capacity detecting unit, causes said information generating unit to operate with priority over said power-saving operation unit if said detected residual capacity is not lower than a predetermined value and, on the other hand, causes said power-saving operation unit to operate with priority over said information generating unit if said detected residual capacity is lower than the predetermined value.

9. The electronic timepiece according to claim 8, wherein said residual capacity detecting unit detects the output voltage or output current of said accumulator unit.

10. The electronic timepiece according to claim 7, which further comprises residual capacity detecting unit for detecting the residual capacity of said accumulator unit and power generation detecting unit for detecting the power generating state of said power generating unit, wherein said preferential operation selecting unit, based on residual capacity detection information from said residual capacity detecting unit and power generation detection information from said power generation detecting unit, causes said information generating unit to operate with priority over said power-saving operation unit if said detected residual capacity is not lower than a predetermined value and if said detected power generating state is not lower than a predetermined power generation level and, on the other hand, causes said power-saving operation unit to operate with priority over said information generating unit if said detected residual capacity is lower than the predetermined value and if said detected power generating state is lower than the predetermined power generation level.

11. The electronic timepiece according to claim 7, which further comprises residual capacity detecting unit for detecting the residual capacity of said accumulator unit and power generation detecting unit for detecting the power generating state of said power generating unit, wherein said preferential operation selecting unit, based on residual capacity detection information from said residual capacity detecting unit and power generation detection information from said power generation detecting unit, causes said information generating unit to operate with priority over said power-saving operation unit if said detected residual capacity is not lower than a predetermined value or if said detected power generating state is not lower than a predetermined power generation level and, on the other hand, causes said power-saving operation unit to operate with priority over said information generating unit if said detected residual capacity is lower than the predetermined value or if said detected power generating state is lower than the predetermined power generation level.

12. The electronic timepiece according to claim 7, which further comprises power generation detecting unit for detecting the power generating state of said power generating unit,

wherein said preferential operation selecting unit, based on power generation detection information from said power generation detecting unit, causes said information generating unit to operate with priority over said power-saving operation unit if said detected power generating state is not lower than a predetermined power generation level and, on the other hand, causes said power-saving operation unit to operate with priority over said information generating unit if said detected power generating state is lower than the predetermined power generation level.

13. The electronic timepiece according to claim 12, wherein said power generation detecting unit detects the quantity of generated electricity, power generation voltage, or power generation current of said power generating unit.

14. The electronic timepiece according to claim 7, wherein a power source for driving each unit of the electronic timepiece is selected from among a power generating unit including a solar cell, windup generator, self winding generator, and temperature-difference generator, or a combination of said power generating unit and accumulator unit including a secondary battery or a high-capacity condenser.

15. An electronic timepiece comprising:

a time information generating unit for generating time information;

a function information generating unit for generating function information;

a warning information generating unit for generating warning information for prompting a predetermined warning;

a display unit capable of alternatively displaying said time information and/or the function information and/or the warning information;

a power-saving operation unit for operating the electronic timepiece in a power- saving operation state entailing lower power consumption than in a normal operation state;

a preferential operation selecting unit for controlling operating order of said function information unit, said warning information generating unit and said power saving operation unit such that generation of warning information occurs before generation of function information and before power saving operation, and generation of function information occurs before power saving operation; and

means for providing power from a power source unit to the components of electronic timepiece requiring power.

16. The electronic timepiece according to claim 15, wherein the display of warning information by said warning information generating unit is given priority over the operation of said function information generating unit and the operation of said power-saving unit.

17. The electronic timepiece according to claim 16, wherein said function information generating unit or said power-saving unit is not operated even if conditions for the operation of said function information generating unit or said power-saving unit are met during the display of said warning information.

18. The electronic timepiece according to claim 16, wherein the operation of said function information generating unit or the operation of said power-saving unit is stopped and said warning information generating unit is operated to display the warning information if conditions for the operation of said warning information generating unit are met during the operation of said function information generating unit or during the operation of said power-saving unit.

19. The electronic timepiece according to claim 15, wherein display unit for displaying the function of said function information generating unit when the same is operated or display unit for stopping the display when said power-saving unit is operated and display unit for displaying the warning information when said warning information generating unit is operated are configured to be duplicate at least partially.

20. The electronic timepiece according to claim 15, wherein said warning information is any one of time adjustment warning information for warning of wrong time indication when the electronic timepiece temporarily was undercharged and stopped is restarted by recharge, charge warning information for prompting charge, and residue warning information for the accumulator unit.

21. A control method for an electronic timepiece which includes time information generating unit for generating time information, warning information generating unit for generating warning information for prompting a predetermined warning, function information generating unit for generating function information, display unit capable of alternatively displaying said time information and/or the function information and/or the warning information, power-saving operation unit for operating the electronic timepiece in a power-saving operation state entailing lower power consumption than in a normal operation state, and means for providing power from a power source unit to the components of the electronic timepiece requiring power

said method comprising preferentially operating said warning information generating unit, rather than the function information unit, under a condition where said function information generating unit should be operated prior to said power saving operation unit.

22. The control method for an electronic timepiece according to claim 21, wherein said preferential operation is selected in accordance with the output voltage and/or output current of the power source unit.

23. The control method for an electronic timepiece according to claim 21, wherein said preferential operation is selected at the request of a user.

24. A control method for an electronic timepiece which includes reference signal generating unit, general information generating unit for generating general information including time information or function information in response to a reference signal from said reference signal generating unit, warning information generating unit for generating warning information for prompting a predetermined warning, display drive unit for outputting a drive signal for displaying said warning information and said general information, and display unit for displaying said general information and said warning information in response to the drive signal from said display drive unit, and can assume a power-saving state entailing lower power consumption than in a normal operation state,

said method comprising controlling the electronic timepiece such that the display of the warning information by operating said warning information generating unit is given priority over the operation of said power-saving operation unit.

25. A control method for an electronic timepiece which includes reference signal generating unit, general information generating unit for generating general information including time information or function information in response to a reference signal from said reference signal generating unit, warning information generating unit for generating warning information for prompting a predetermined warning, display drive unit for outputting a drive signal for displaying said warning information and said general information, and display unit for displaying said general information and said warning information in response to the drive signal from said display drive unit, and can assume a power-saving state entailing lower power consumption than in a normal operation state, said method comprising controlling the electronic timepiece such that said power-saving state is not established even if conditions for the establishment of the power-saving state are met during the display of the warning information by said warning information generating unit.

26. A control method for an electronic timepiece which includes reference signal generating unit, general information generating unit for generating general information including time information or function information in response to a reference signal from said reference signal generating unit, warning information generating unit for generating warning information for prompting a predetermined warning, display drive unit for outputting a drive signal for displaying said warning information and said general information, and display unit for displaying said general information and said warning information in response to the drive signal from said display drive unit, and can assume a power-saving state entailing lower power consumption than in a normal operation state,

said method comprising controlling the electronic timepiece such that said power-saving state is canceled to establish a display state for the warning information if conditions for the operation of said warning information generating unit are met during said power-saving state.

27. An electronic timepiece comprising:

a non-time information generating unit for generating time information;

an information generating unit for generating other information other than the time information;

a display unit capable of alternatively displaying said time information and/or the other information;

a power-saving operation unit for operating the electronic timepiece in a power-saving operation state entailing lower power consumption than in a normal operation state; and

a preferential operation selecting unit for changing priority sequence between said non time information generating unit and said power saving operation unit according to an outside operation or a predetermined condition, wherein said individual unit is driven by a power source unit.

28. An electronic timepiece comprising:

a non-time information generating unit for generating time information;

an information generating unit for generating other information other than the a time information and power source information;

a display unit capable of alternatively displaying said time information and/or the other information;

a power-saving operation unit for operating the electronic timepiece in a power-saving operation state entailing lower power consumption than in a normal operation state; and

a preferential operation selecting unit for changing priority sequence between said non-time information generating unit and said power saving operation unit according to an outside operation or a predetermined condition.

29. An electronic timepiece comprising:

a time information generating unit for generating time information;

a function information generating unit for generating function information;

warning information generating unit for generating warning information for prompting a predetermined warning;

a display unit capable of alternatively displaying said time information and/or the function information and/or the warning information;

a power-saving operation unit for operating the electronic timepiece in a power-saving operation state entailing lower power consumption than in a normal operation state; and

a preferential operation selecting unit for preferentially operating said function information generating unit and/or the warning information generating unit, or said power-saving operation unit according to an outside operation.

30. An electronic timepiece comprising:

a time information generating unit for generating time information;

a function information generating unit for generating function information other than time information and power source information;

a warning information generating unit for generating warning information for prompting a predetermined warning;

a display unit capable of alternatively displaying said time information and/or the function information and/or the warning information;

a power-saving operation unit for operating the electronic timepiece in a power-saving operation state entailing lower power consumption than in a normal operation state; and

a preferential operation selecting unit for preferentially operating said function information generating unit and/or the warning information generating unit, or said power-saving operation unit according to circumstances.

31. An electronic timepiece comprising:

a time information generating unit for generating time information;

a function information generating unit for generating function information;

a warning information generating unit for generating warning information for prompting a predetermined warning;

a display unit capable of alternatively displaying said time information and/or the function information and/or the warning information;

a power-saving operating unit for operating the electronic timepiece in a power-saving operation state entailing lower power consumption than in a normal operation state; and

a preferential operation selecting unit for preferentially displaying the warning information by said warning information generating unit, prior to the operation of said function information generating unit and the operation of said power-saving operating unit, wherein said individual unit is driven by a power source unit.