JPH0792507B2 - Electronic clock - Google Patents
Electronic clockInfo
- Publication number
- JPH0792507B2 JPH0792507B2 JP60067583A JP6758385A JPH0792507B2 JP H0792507 B2 JPH0792507 B2 JP H0792507B2 JP 60067583 A JP60067583 A JP 60067583A JP 6758385 A JP6758385 A JP 6758385A JP H0792507 B2 JPH0792507 B2 JP H0792507B2
- Authority
- JP
- Japan
- Prior art keywords
- boosting
- voltage
- charge storage
- storage member
- charge
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 238000010248 power generation Methods 0.000 claims description 12
- 230000010355 oscillation Effects 0.000 claims description 4
- 239000003990 capacitor Substances 0.000 description 9
- 238000000034 method Methods 0.000 description 5
- 238000001514 detection method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000007599 discharging Methods 0.000 description 3
- 230000000630 rising effect Effects 0.000 description 3
- 230000003247 decreasing effect Effects 0.000 description 2
- 230000001960 triggered effect Effects 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Landscapes
- Electromechanical Clocks (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、内部に発電機構と電荷蓄積部材に充電された
該発電機構からの発電圧を昇降圧する昇降圧手段を持
ち、その昇降圧電圧をシステムの電源として使用する電
子時計に関し、特にその充電状態表示に関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention has a power generation mechanism and a step-up / down means for boosting / decreasing the voltage generated by the power generation mechanism charged in a charge storage member. The present invention relates to an electronic timepiece that uses a battery as a power source of a system, and particularly relates to its charge status display.
従来電子時計は、ボタン型電池等の１次電池を使用して
動作していたが、近年時計の電池寿命を延ばすために太
陽電池等の発電機構を有し、その発電電子を２次電池に
充電して利用したり、最近では２次電池の換わりに電気
二重層コンデンサに前記発電電力を蓄えて電源とし、半
永久的に動作する電子時計も発売されている。さらに、
発電手段により充電された電気二重層コンデンサのよう
な、電源電圧の放電特性がフラットではない電源を備え
た電子時計の改良も考えられ、詳細は特願昭59−246778
号（特開昭61−124887号）に開示されている。そして、
該特許出願に開示されているように、発電電力を無駄な
く有効に利用するために、内部に昇圧回路を有し電荷蓄
積部材に蓄えられ発生した電圧を昇圧して利用してい
る。Conventionally, an electronic timepiece has been operated by using a primary battery such as a button type battery, but in recent years, in order to extend the battery life of the timepiece, it has a power generation mechanism such as a solar cell, and its power generation electron is used as a secondary battery. An electronic timepiece that is semi-permanently operated by charging and using it, or recently, by storing the generated electric power in an electric double layer capacitor instead of a secondary battery and using it as a power source has been put on the market. further,
It is also possible to improve an electronic timepiece provided with a power supply whose discharge characteristic of the power supply voltage is not flat, such as an electric double layer capacitor charged by a power generation means. For details, see Japanese Patent Application No. 59-246778.
JP-A-61-24887. And
As disclosed in the patent application, in order to effectively use the generated power without waste, a voltage booster circuit is provided inside and the voltage stored in the charge storage member is boosted and used.
これらの時計は、電荷蓄積部材に蓄えられた電荷が動作
源であるため、その蓄積量を知ることが重要となってく
る。その１つの方法として、電荷蓄積部材の発生電圧を
検出する手段があるが、蓄積量を細かく知るためには多
くの基準電圧を持つ大規模な電圧検出手段を要すること
になってしまう。また、蓄積量を表示するために、イン
ジケータを専用に設けると回路負荷，コストとも増すこ
とになる。従って、本発明の目的は、この不都合を無く
すために、前記特願昭59−246778（特開昭61−124887
号）に開示されているような昇圧回路を利用し、表示状
態により細かく電荷蓄積状態を知ることができるように
することにある。In these watches, since the electric charge accumulated in the electric charge accumulating member is the operation source, it is important to know the accumulated amount. As one of the methods, there is a means for detecting the voltage generated by the charge storage member, but a large-scale voltage detection means having many reference voltages is required in order to know the amount of charge in detail. Further, if an indicator is provided exclusively for displaying the accumulated amount, the circuit load and cost will increase. Therefore, in order to eliminate this inconvenience, the object of the present invention is to provide the above-mentioned Japanese Patent Application No. 59-246778 (Japanese Patent Application Laid-Open No. 61-124887).
It is to make it possible to know the charge storage state more finely according to the display state by using the booster circuit as disclosed in No. 1).
本発明の電子時計は、発振回路を含む計時手段と指針を
駆動する表示制御手段とからなる時計手段と、 発電機構と、 該発電機構で発電された電荷を蓄える第１の電荷蓄積部
材と、 前記第１の電荷蓄積部材に発生して電圧を昇圧するとと
もに、複数の昇圧倍率を有する昇圧手段と、 前記昇圧手段により昇圧された電圧による電荷が充電さ
れ前記時計手段の電源となる第２の電荷蓄積部材と、 前記昇圧手段による昇圧された電圧値を検出し該電圧値
により前記昇圧手段の昇圧倍率を変化させる制御信号を
出力する電圧検出手段とを有してなり、 前記表示制御手段は前記昇圧手段から前記昇圧倍率を示
す信号が入力されると該昇圧倍率に応じて指針の運針を
変化させるよう構成されることを特徴とする。The electronic timepiece of the present invention includes a timepiece means including a timekeeping means including an oscillation circuit and a display control means for driving a pointer, a power generation mechanism, and a first charge storage member for storing electric charges generated by the power generation mechanism, A second voltage source that is generated by the first charge storage member to boost the voltage, has a plurality of boosting ratios, and is charged by the voltage boosted by the voltage boosting unit and serves as a power source for the timepiece unit. The display control means comprises: a charge storage member; and a voltage detection means for detecting a voltage value boosted by the boosting means and outputting a control signal for changing the boosting ratio of the boosting means according to the voltage value. When the signal indicating the boosting ratio is input from the boosting unit, the movement of the pointer is changed according to the boosting ratio.
本発明の作用を述べれば、電荷蓄積状態に応じて昇圧倍
率が変えられる昇圧手段の昇圧倍率に対応して表示状態
を変化させることにより、その時の電荷蓄積状態を知る
ことができる。To describe the operation of the present invention, the charge storage state at that time can be known by changing the display state in accordance with the boost rate of the boosting unit whose boost rate can be changed according to the charge storage state.
第１図は、本発明のシステムブロック図であり、第２図
は、第１図における電気二重層コンデンサの充放電によ
って生ずる発生電圧Vscの変化と該Vscを昇圧した電圧Vs
sと、それに応じて変化する表示状態を表したものであ
る。FIG. 1 is a system block diagram of the present invention, and FIG. 2 is a change in generated voltage Vsc caused by charging and discharging of the electric double layer capacitor in FIG. 1 and voltage Vs obtained by boosting Vsc.
s and a display state that changes accordingly.
第１図に表わした電子時計は、特願昭59−246778（特開
昭61−124887号）に開示されているような発電手段１と
昇圧手段３を有する電子時計であり、発電手段１による
起電力は、ダイオード８で整流され電気二重層コンデン
サ２に充電される。該電気二重層コンデンサに発生した
電圧Vscは電圧検出手段５からの信号によって制御され
る昇圧手段３によって昇圧され、該昇圧電圧Vssはバッ
クアップコンデンサ７に充電される。前記電圧検出手段
５は、Vssの電圧（本実施例では、1.2vと1.8vと1.6v）
を検出しそれによって昇圧手段３の昇圧倍率を制御する
信号を出力する。また、バックアップコンデンサ７は電
圧検出手段５、計時手段６、運針制御手段４の電源とな
る。計時手段６は発振回路を含み、計時信号，タイミン
グ信号等を形成する。４は本発明による表示制御手段で
あり、昇圧倍率を示す信号S1,S2を昇圧手段より受け、
表示状態を変える構成になっており、表示手段を構成す
る運針用のステップモータを駆動する。本実施例では、
第２図に示すように、２倍から1.5倍へ昇圧倍率を下げ
る場合を除き、|Vss|が1.8Vを越える度に昇圧倍率を下
げてゆき、1.2Vを割る度に昇圧倍率を上げている。The electronic timepiece shown in FIG. 1 is an electronic timepiece having a power generating means 1 and a boosting means 3 as disclosed in Japanese Patent Application No. 59-246778 (Japanese Patent Laid-Open No. 61-124887). The electromotive force is rectified by the diode 8 and charged in the electric double layer capacitor 2. The voltage Vsc generated in the electric double layer capacitor is boosted by the boosting means 3 controlled by the signal from the voltage detecting means 5, and the boosted voltage Vss is charged in the backup capacitor 7. The voltage detecting means 5 has a voltage of Vss (1.2v, 1.8v and 1.6v in this embodiment).
Is detected and a signal for controlling the boosting ratio of the boosting means 3 is output accordingly. The backup capacitor 7 serves as a power source for the voltage detecting means 5, the time measuring means 6, and the hand movement control means 4. The clock means 6 includes an oscillation circuit and forms a clock signal, a timing signal and the like. Reference numeral 4 denotes a display control means according to the present invention, which receives signals S 1 and S 2 indicating a boosting ratio from the boosting means,
The display state is changed, and a step motor for moving the hands which constitutes the display means is driven. In this embodiment,
As shown in Fig. 2, except when lowering the boosting ratio from 2 times to 1.5 times, decrease the boosting ratio every time | Vss | exceeds 1.8V, and increase it every 1.2V. There is.
ここで、２倍から1.5倍へ昇圧倍率を下げる際は、Vssが
1.6Vを越えた場合（Vscが0.8Vを越えた場合に相当す
る）、昇圧倍率を切り替えている。Here, when lowering the boosting ratio from 2 times to 1.5 times, Vss
When it exceeds 1.6V (corresponding to when Vsc exceeds 0.8V), the boosting ratio is switched.
これは、本実施例における放電過程（充電量が低下しつ
つあり昇圧倍率を上げてゆく過程）では、２倍昇圧の区
間は、Vssが1.6Vから1.2Vまでの間（Vscが0.8Vから0.6V
の区間に相当する）となるため、充電過程と放電過程に
おける２倍昇圧の区間を一致させるためである。該昇圧
倍率の範囲は３倍,2倍,1.5倍,1倍であり、それぞれの範
囲はVscの電圧で規定されるが、該電圧は充電電荷量に
比例する。従って、この昇圧倍率に伴って表示状態をA,
B,C,通常表示と変える表示制御手段を設け、例えばＡ表
示は１秒２秒の繰り返し運針、Ｂ表示は２秒運針、Ｃ表
示は３秒運針とすることにより、電気二重層コンデンサ
の充電状態を一目瞭然で知ることが可能となった。本例
では、第２図から明らかなように、通常表示時は充電率
67％以上、Ａ表示時は44％〜67％、Ｂ表示時は33％〜44
％、Ｃ表示時は33％以下となる。図中“不定”とはVss
がICの動作範囲外となってしまい制御不可の領域であ
る。This is because during the discharging process (the process in which the charge amount is decreasing and the boosting ratio is increased) in the present embodiment, the double boosting section is between Vss 1.6V and 1.2V (Vsc 0.8V 0.6V
This is because the double boosting section in the charging process and the discharging process are made to coincide with each other. The range of the boosting ratio is 3 times, 2 times, 1.5 times, and 1 time, and each range is defined by the voltage of Vsc, but the voltage is proportional to the amount of charge. Therefore, the display state is changed to A,
Charging an electric double layer capacitor by providing display control means for changing from B, C, and normal display, for example, A display is repeatedly operated for 1 second and 2 seconds, B display is for 2 seconds, and C display is for 3 seconds. It became possible to know the state at a glance. In this example, as is clear from FIG. 2, the charging rate is in normal display.
67% or more, A display 44% to 67%, B display 33% to 44
%, C is 33% or less. “Undefined” in the figure is Vss
Is outside the IC operating range and cannot be controlled.
次に、第３図は本発明による表示制御手段としての運針
制御手段の一実施例（ａ）とそのタイミングチャート
（ｂ）である。本実施例は、第１図に示した昇圧倍率を
示す信号S2で運針タイミングを決定する基準信号である
φ１と を切り換えて１倍及び1.5倍昇圧時には１秒運針され、
２倍及び３倍昇圧時には２秒運針される表示手段を実現
するものである。ここで、信号S1,S2と第２図に示した
昇圧倍率との関係は以下のように設定されているものと
する。Next, FIG. 3 shows an embodiment (a) of the hand movement control means as the display control means according to the present invention and its timing chart (b). In this embodiment, φ 1 which is a reference signal for determining the hand movement timing by the signal S 2 indicating the boosting ratio shown in FIG. Is switched and the hands are moved for 1 second when boosting 1x or 1.5x,
This is to realize a display means for moving the hand for 2 seconds when the voltage is doubled or tripled. Here, it is assumed that the relationship between the signals S 1 and S 2 and the boosting ratio shown in FIG. 2 is set as follows.
第３図において、31は立上がりトリガのＤタイプ・フリ
ップフロップであり、S2以外の入力信号は計時手段６か
ら与えられ、出力OUTがモータ駆動パルス出力のタイミ
ングとなる。また、タイミングチャートにおけるOUT
（１）はS2が“0"の時、OUT（２）はS2が“1"の時の運
針状態である。 In FIG. 3, reference numeral 31 is a rising-triggered D-type flip-flop, input signals other than S 2 are given from the timing means 6, and the output OUT becomes the timing of motor drive pulse output. Also, OUT in the timing chart
(1) is the state of hand movement when S 2 is “0” and OUT (2) is when S 2 is “1”.
さらに第４図は本発明による表示制御手段としての運針
制御手段の他の実施例（ａ）とそのタイミングチャート
（ｂ）であり、前記実施例と同様に信号S1とS2により運
針タイミングを決定する基準信号のφ1,φ1/2，φ1/3を
切り換えて、１倍昇圧時には１秒運針され、1.5倍昇圧
時には１秒運針と２秒運針を交互運針され、２倍昇圧時
には２秒運針され、３倍昇圧時には３秒運針される表示
手段を実現するものである。なお信号S1,S2と昇圧倍率
との関係は前記第１表に準ずる。第４図において、41は
立上がりトリガのＤタイプ・フリップフロップであり、
S1,S2以外の入力信号は計時手段６から与えられ、出力O
UTがモータ駆動パルス出力のタイミングとなる。また、
タイミングチャートにおけるOUT（１），（２），
（３），（４）はそれぞれ昇圧倍率が１倍,1.5倍,2倍,3
倍の時の運針状態である。Further, FIG. 4 shows another embodiment (a) of the hand movement control means as the display control means according to the present invention and its timing chart (b). The hand movement timing is determined by the signals S 1 and S 2 as in the case of the above embodiment. By switching φ 1 , φ 1/2 , and φ 1/3 of the reference signal to be determined, 1-second hand movement is performed for 1-time boosting, 1-second hand movement and 2-second hand movement are alternately performed for 1.5-time boosting, and 2-time boosting is performed. It realizes a display means that moves for 2 seconds and moves for 3 seconds when the voltage is tripled. The relationship between the signals S 1 and S 2 and the boosting ratio is in accordance with Table 1 above. In FIG. 4, 41 is a rising-triggered D-type flip-flop,
Input signals other than S 1 and S 2 are given from the timing means 6 and output O
UT becomes the motor drive pulse output timing. Also,
OUT (1), (2), in the timing chart
(3) and (4) have boost ratios of 1, 1.5, 2 and 3, respectively.
It is a state of hand movement when doubled.
以上述べたように、本発明は、発振回路を含む計時手段
と指針を駆動する表示制御手段とからなる時計手段と、
発電機構と、該発電機構で発電された電荷を蓄える第１
の電荷蓄積部材と、前記第１の電荷蓄積部材に発生した
電圧を昇圧するとともに、複数の昇圧倍率を有する昇圧
手段と、前記昇圧手段により昇圧された電圧により電荷
が充電され前記時計手段の電源となる第２の電荷蓄積部
材と、前記昇圧手段により昇圧された電圧値を検出し該
電圧値により前記昇圧手段の昇圧倍率を変化させる制御
信号を出力する電圧検出手段とを有してなり、 前記表示制御手段は前記昇圧倍率を示す信号が入力され
ると指針の運針を変化させるよう構成されるため、時計
機能を充電量の少ない段階から駆動させる昇圧手段を備
え、その元来備えている昇圧手段を制御する信号である
昇圧倍率を指定する信号をいわば流用して、指針表示を
変化させることにより、充電量（電荷蓄積量）表示のた
めだけに新たに回路を付加することなく、充電量を使用
者に知らせることができ、時計手段の電源電圧を得る昇
圧手段を有する時計において、より低コストで、充電量
の確認が容易な電子時計を提供できるものである。さら
に、２倍,3倍昇圧時は１倍,1.5倍昇圧時に比べてはるか
に時間が短いので、指針表示電子時計においてはその状
態を２秒運針で知らせることは電池寿命表示としては有
効な手段であり、また１倍昇圧時は１秒運針、1.5倍昇
圧時は１秒２秒の繰返し運針、２秒昇圧時は２秒運針、
３倍昇圧時には３秒運針と昇圧倍率に運針秒数を合わせ
ることにより、その時々の時計状態を適確に知ることが
可能となる。As described above, the present invention is a clock means including a clock means including an oscillation circuit and a display control means for driving a pointer,
A power generation mechanism and a first for storing electric charges generated by the power generation mechanism
Of the charge accumulating member and the first charge accumulating member, and a voltage boosting means having a plurality of boosting ratios, and electric charges are charged by the voltage boosted by the voltage boosting means. And a voltage detecting means for detecting a voltage value boosted by the boosting means and outputting a control signal for changing the boosting ratio of the boosting means according to the voltage value. Since the display control means is configured to change the movement of the hands when the signal indicating the boosting ratio is input, the display control means is provided with the boosting means for driving the timepiece function from a stage where the charge amount is small, and is originally provided. A signal for designating the step-up ratio, which is a signal for controlling the step-up means, is used as it is, and a new circuit is added only for displaying the charge amount (charge accumulation amount) by changing the pointer display. It is possible to provide an electronic timepiece which can inform the user of the amount of charge without doing so and which has a boosting means for obtaining the power supply voltage of the timepiece means at a lower cost and in which the amount of charge can be easily confirmed. Furthermore, since the time required for boosting 2 times or 3 times is much shorter than that for boosting 1 time or 1.5 times, it is an effective means to indicate the battery life in the electronic timepiece for indicating hands by indicating the state for 2 seconds. In addition, it is a 1-second hand movement at the time of 1-time boosting, a 1-second 2-second hand movement at the time of 1.5-time boosting, a 2-second hand movement at the time of 2-second pressure raising,
By adjusting the number of seconds for hand movement and the number of seconds for hand movement at the time of raising the pressure by 3 times, it becomes possible to accurately know the timepiece state at that time.
第１図……本発明のシステムブロック図 第２図……第１図のVsc,Vssの変化と運針状態を示した
図 第３図（ａ）……本発明による運針制御手段の一実施例
を示す図 第３図（ｂ）……第３図（ａ）のタイミングチャート 第４図（ａ）……本発明による運針制御手段の他の実施
例を示す図 第４図（ｂ）……第４図（ａ）のタイミングチャート １……発電手段 ２……電荷蓄積部材 ３……昇降圧手段 ４……本発明の運針制御手段 ５……電圧検出手段 ６……計時手段 ７……バックアップコンデンサ ８……ダイオード 31,41……立上がりトリガのＤタイプ・フリップフロッ
プFIG. 1 ... System block diagram of the present invention FIG. 2 ... Diagram showing changes of Vsc and Vss and hand movement state of FIG. 3 (a) ... One embodiment of hand movement control means according to the present invention FIG. 3 (b) ... Timing chart of FIG. 3 (a) FIG. 4 (a) .. FIG. 4 (b) showing another embodiment of the hand movement control means according to the present invention. Timing chart of FIG. 4 (a) 1 ... Power generation means 2 ... Charge storage member 3 ... Buck-boost means 4 ... Hand movement control means 5 ... Voltage detection means 6 ... Time measurement means 7 ... Backup Capacitor 8 …… Diode 31,41 …… Rising trigger D type flip-flop
フロントページの続き (72)発明者 鮎沢 仁美 長野県諏訪市大和３丁目３番５号 株式会 社諏訪精工舎内 (56)参考文献 特開 昭54−85767（ＪＰ，Ａ) 特開 昭57−119278（ＪＰ，Ａ) 特開 昭55−24656（ＪＰ，Ａ) 特開 昭57−7372（ＪＰ，Ａ)Front page continuation (72) Inventor Hitomi Ayuzawa 3-5 Yamato, Suwa City, Nagano Stock Company Suwa Seikosha Co., Ltd. (56) Reference JP 54-85767 (JP, A) JP 57- 119278 (JP, A) JP 55-24656 (JP, A) JP 57-7372 (JP, A)
Claims (1)
表示制御手段とからなる時計手段と、 発電機構と、 該発電機構で発電された電荷を蓄える第１の電荷蓄積部
材と、 前記第１の電荷蓄積部材に発生した電圧を昇圧するとと
もに、複数の昇圧倍率を有する昇圧手段と、 前記昇圧手段により昇圧された電圧により電荷が充電さ
れ前記時計手段の電源となる第２の電荷蓄積部材と、 前記昇圧手段により昇圧された電圧値を検出し該電圧値
により前記昇圧手段の昇圧倍率を変化させる制御信号を
出力する電圧検出手段とを有してなり、 前記表示制御手段は前記昇圧手段から前記昇圧倍率を示
す信号が入力されると該昇圧倍率に応じて指針の運針を
変化させるよう構成されることを特徴とする電子時計。1. A clock means including a clock means including an oscillation circuit and a display control means for driving a pointer, a power generation mechanism, a first charge storage member for storing charges generated by the power generation mechanism, and the first charge storage member. A second charge storage member that boosts the voltage generated in one charge storage member and has a plurality of boosting ratios, and a charge that is charged by the voltage boosted by the booster unit and that serves as a power supply for the timepiece unit. And a voltage detecting means for detecting a voltage value boosted by the boosting means and outputting a control signal for changing the boosting ratio of the boosting means according to the voltage value, wherein the display control means is the boosting means. An electronic timepiece configured to change the movement of the hands according to the boosting ratio when a signal indicating the boosting ratio is input from.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60067583A JPH0792507B2 (en) | 1985-03-29 | 1985-03-29 | Electronic clock |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60067583A JPH0792507B2 (en) | 1985-03-29 | 1985-03-29 | Electronic clock |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61286785A JPS61286785A (en) | 1986-12-17 |
| JPH0792507B2 true JPH0792507B2 (en) | 1995-10-09 |
Family
ID=13349082
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60067583A Expired - Lifetime JPH0792507B2 (en) | 1985-03-29 | 1985-03-29 | Electronic clock |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0792507B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7327638B2 (en) | 2002-09-24 | 2008-02-05 | Citizen Holdings Co., Ltd. | Electronic timepiece |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5485767A (en) * | 1977-12-20 | 1979-07-07 | Seiko Instr & Electronics Ltd | Electronic watch |
| JPS5524656A (en) * | 1978-08-11 | 1980-02-21 | Seiko Instr & Electronics Ltd | Electronic watch |
| JPS57119278A (en) * | 1981-01-17 | 1982-07-24 | Citizen Watch Co Ltd | Power source device for electronic watch |
-
1985
- 1985-03-29 JP JP60067583A patent/JPH0792507B2/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7327638B2 (en) | 2002-09-24 | 2008-02-05 | Citizen Holdings Co., Ltd. | Electronic timepiece |
| CN100422879C (en) * | 2002-09-24 | 2008-10-01 | 西铁城控股株式会社 | Electronic clock, electronic device and starting method |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61286785A (en) | 1986-12-17 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |