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Electronic device and control method of electronic device

A technology of electronic equipment and control method, which is applied to radio-controlled timers, radio wave measurement systems, satellite radio beacon positioning systems, etc., and can solve problems such as inability to perform time correction and accumulation of time errors

Inactive Publication Date: 2019-07-05
SEIKO EPSON CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is a problem that even if the reception process is executed at the first time or the second time, the time cannot be corrected if the radio-controlled timepiece cannot receive the standard radio wave.
Furthermore, there is a problem that even if the internal time is corrected by receiving standard radio waves, if the frequency accuracy of the clock signal of the crystal oscillator 431 of the radio-controlled timepiece is low, time errors will accumulate due to the clock signal. in internal time

Method used

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  • Electronic device and control method of electronic device
  • Electronic device and control method of electronic device
  • Electronic device and control method of electronic device

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Experimental program
Comparison scheme
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no. 1 approach

[0062] Hereinafter, the electronic device 1 according to the first embodiment will be described.

[0063] A.1. Outline of the electronic device 1 according to the first embodiment

[0064] exist figure 1 , a perspective view of the electronic device in the first embodiment is shown. The electronic device 1 indicates the time by the movement of electrons. Such as figure 1 As shown, the electronic device 1 is a wrist watch. Electronic device 1 includes band unit 2, button 4-1, button 4-2, button 4-3, case unit 6, time display unit 10, and solar cell 15 (an example of “power generation mechanism”). The time display unit 10 includes an hour hand 11 , a minute hand 12 and a second hand 13 . The time display unit 10 indicates the time by the respective pointer orientations of the hour hand 11 , the minute hand 12 , and the second hand 13 . The solar cell 15 generates electricity by converting light energy into electrical energy.

[0065] exist figure 2 In , a configuration ...

no. 2 approach

[0139] In the first embodiment, when the determination unit 221 determines that the GPS radio wave reception unit 21-2 can receive the GPS radio waves, it determines that the electronic device 1 is located outdoors. In the second embodiment, it is determined whether the electronic device 1 is located outdoors or indoors based on the reception intensity of any one of GPS radio waves, standard radio waves, LPWA radio waves, and mobile phone radio waves. The second embodiment will be described below. In addition, in each mode and modification example shown below, the reference numerals used in 1st Embodiment are used for the same element of operation|movement and function as 1st Embodiment, and each detailed description is abbreviate|omitted suitably.

[0140] B.1. Outline of electronic device 1 according to the second embodiment

[0141] exist Figure 6 A configuration diagram of the electronic device 1 in the second embodiment is shown in . In the second embodiment, the stan...

no. 3 approach

[0147] In the second embodiment, the determination unit 221 determines whether the electronic device 1 is located outdoors or indoors based on any one of the received intensity ri-gps, the received intensity ri-rw, the received intensity ri-lpwa, and the received intensity ri-mob. Judged. In the third embodiment, it is determined whether the electronic device 1 is located outdoors or indoors based on the amount of power generation per unit time generated by the solar cell 15 . Hereinafter, a third embodiment will be described. In addition, in each mode and modification example shown below, the code|symbol used in the 1st embodiment or 2nd embodiment is used appropriately for the element whose operation|movement and function are the same as those of 1st embodiment or 2nd embodiment. A detailed description of each is omitted.

[0148] C.1. Outline of electronic device 1 according to the third embodiment

[0149] exist Figure 7 A configuration diagram of the electronic devic...

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PUM

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Abstract

The present invention provides an electronic device and a control method of an electronic device, capable of improving the accuracy of the internal time of the electronic device even when the environment of the electronic device changes. A control unit (22) outputs frequency information from standard radio wave frequency information (if-rw), GPS frequency information (if-gps), LPWA frequency information (if-lpwa), and mobile phone frequency information (if-mob), and controls an oscillation circuit (23) such that a frequency of a clock signal is close to a reference frequency (f0). Accordingly,even in a case where an environment of an electronic device (1) changes, it is possible to improve accuracy of an internal time by correcting a frequency (fvco) of the clock signal by using a radio wave appropriate for the environment after the change.

Description

technical field [0001] The invention relates to an electronic device and a control method for the electronic device. Background technique [0002] Conventionally, a structure for receiving standard radio waves is known as a technique for aligning the internal time of an electronic device with the correct time. For example, Patent Document 1 discloses an electronic device that receives standard radio waves. The electronic device demodulates the received standard radio wave to obtain a TCO (Time Code Out: Time Code Out) signal, extracts date information and time information from the TCO signal, and performs it in such a way that the internal time is consistent with the correct time. Correction. [0003] The radio-controlled timepiece of Patent Document 1 includes: a receiving unit that receives standard radio waves; a crystal vibrator 431 that generates a reference signal; a time counter 471 that counts the internal time based on the reference signal; and a timing reception ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G04R20/10G04R20/08G04R20/00
CPCG04R20/10G04R20/08G04R20/00G04R20/14G04R20/02G01S19/256
Inventor 松本一实
Owner SEIKO EPSON CORP