JPH11332127A - Electric apparatus with solar cell - Google Patents

Electric apparatus with solar cell

Info

Publication number
JPH11332127A
JPH11332127A JP10138404A JP13840498A JPH11332127A JP H11332127 A JPH11332127 A JP H11332127A JP 10138404 A JP10138404 A JP 10138404A JP 13840498 A JP13840498 A JP 13840498A JP H11332127 A JPH11332127 A JP H11332127A
Authority
JP
Japan
Prior art keywords
solar cell
secondary battery
voltage
led
switch
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.)
Granted
Application number
JP10138404A
Other languages
Japanese (ja)
Other versions
JP3455673B2 (en
Inventor
Hideyuki Nakamura
秀行 中村
Toshiaki Shirai
俊明 白井
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Seiko Time Creation Inc
Original Assignee
Seiko Clock Inc
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Seiko Clock Inc filed Critical Seiko Clock Inc
Priority to JP13840498A priority Critical patent/JP3455673B2/en
Publication of JPH11332127A publication Critical patent/JPH11332127A/en
Application granted granted Critical
Publication of JP3455673B2 publication Critical patent/JP3455673B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/50Photovoltaic [PV] energy
    • Y02E10/56Power conversion systems, e.g. maximum power point trackers

Abstract

PROBLEM TO BE SOLVED: To confirm whether a secondary battery is adequately charged or not and whether a solar cell is generating a sufficient power or not by using only a single light-emitting diode(LED). SOLUTION: A secondary battery 3 charged by a solar cell 1 is provided. A series circuit consisting of an LED 7, a transistor 9 and a switch 10 is connected in parallel to the secondary battery 3. The base of the transistor 9 is connected to the high potential side of the solar cell 1. Therefore, when the switch 10 is closed, only if the secondary battery 2 is sufficiently charged. Furthermore, the solar cell 1 is generating a sufficient power, the LED 7 emits a light. With this constitution, whether the secondary battery 3 is charged or not and whether the solar cell 1 is generating a sufficient power or not can be determined by only one LED 7.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【発明の技術分野】本発明は、ソーラー時計のような太
陽電池付き電気機器に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric device with a solar cell, such as a solar clock.

【0002】[0002]

【従来の技術】従来、太陽電池を電源とした機器、例え
ばソーラー時計などでは、周囲が暗く太陽電池が電圧を
発生しなくなる場合に備えて、補助的な電源として充電
式の2次電池を採用することが一般的である。
2. Description of the Related Art Conventionally, in a device using a solar battery as a power source, for example, a solar clock, a rechargeable secondary battery is used as an auxiliary power source in case the surroundings are dark and the solar battery does not generate voltage. It is common to do.

【0003】また、この2次電池が十分に充電されてい
るか確認できるように、その充電量を表示する表示部
(インジケーター)を備えているものがある。さらに、
太陽電池が十分に発電しているか確認できるようにその
発電量を表示するものもある。
[0003] Some rechargeable batteries are provided with a display unit (indicator) for displaying the amount of charge so that it can be checked whether the rechargeable battery is sufficiently charged. further,
Some display the amount of power generated so that the solar cell can generate sufficient power.

【0004】図2は2次電池の充電具合を表示可能なソ
ーラー時計の構成を示した図である。具体的に図2を説
明すると、101は太陽電池、102はレギュレータ、
103はダイオード、104は充電式の2次電池、10
5は時計回路である。レギュレータ102は太陽電池1
01が発生する電圧により動作し、2次電池104に許
容値以上の電圧が印加されることを防止する。時計回路
105はレギュレータ102を介して供給される太陽電
池101の電圧出力および2次電池104を電源として
駆動する。106は発光ダイオード(以下「LED」と
いう。)、107、108はダイオード、109、11
0はスイッチである。
FIG. 2 is a diagram showing a configuration of a solar timepiece capable of displaying a state of charge of a secondary battery. Referring specifically to FIG. 2, 101 is a solar cell, 102 is a regulator,
103 is a diode, 104 is a rechargeable secondary battery, 10
5 is a clock circuit. The regulator 102 is the solar cell 1
01 operates with the voltage generated by 01, and prevents a voltage higher than the allowable value from being applied to the secondary battery 104. The clock circuit 105 drives using the voltage output of the solar cell 101 supplied via the regulator 102 and the secondary battery 104 as a power supply. 106 is a light emitting diode (hereinafter referred to as “LED”), 107 and 108 are diodes, 109 and 11
0 is a switch.

【0005】以下、動作を簡単に説明する。例えばLE
D106、ダイオード107、108はそれぞれ約0.
7V以上の電圧が印加されたとき電流を流すものとする
と、2.1V以上の電圧が2次電池104にあればスイ
ッチ109を閉成した際にLED106は点灯する。よ
って、このLED106、ダイオード107、108の
動作電圧の合計値を時計回路105の最低動作電圧に関
連づけることにより、LED106の発光をもって2次
電池104が時計回路105を駆動させるのに十分な電
圧が充電されているか否か確認できる。例えば上記の場
合、時計回路105の最低動作電圧が2.0Vであれ
ば、LED106が発光することにより、少なくともあ
と0.1V分の動作が可能な程度の電圧が2次電池10
4に充電されていることがわかる。なお、この0.1V
分が何日分の容量になるのかは、2次電池104の種
類、時計回路105の消費電流による。
The operation will be briefly described below. For example LE
D106 and diodes 107 and 108 are each approximately 0.5.
Assuming that a current flows when a voltage of 7 V or more is applied, if a voltage of 2.1 V or more is present in the secondary battery 104, the LED 106 is turned on when the switch 109 is closed. Therefore, by associating the total value of the operating voltages of the LED 106 and the diodes 107 and 108 with the minimum operating voltage of the clock circuit 105, a voltage sufficient for the secondary battery 104 to drive the clock circuit 105 by the emission of the LED 106 is charged. You can check if it is done. For example, in the case described above, if the minimum operating voltage of the clock circuit 105 is 2.0 V, the LED 106 emits light, so that the secondary battery 10 can operate at least another 0.1 V.
4 that the battery is charged. Note that this 0.1 V
How many minutes the capacity corresponds to depends on the type of the secondary battery 104 and the current consumption of the clock circuit 105.

【0006】他方、図3は太陽電池の発電量を表示可能
なソーラー時計の構成を示したものである。同図におい
て、111は電流計、112は抵抗である。なお、図2
と同一のものには同一符号を附してある。
On the other hand, FIG. 3 shows a configuration of a solar clock capable of displaying the amount of power generated by a solar cell. In the figure, 111 is an ammeter and 112 is a resistor. Note that FIG.
The same reference numerals are given to the same components.

【0007】この場合、スイッチ109を閉じると、太
陽電池101の発電電流量を電流計111で表示でき、
いま現在の発電量を知ることができる。
In this case, when the switch 109 is closed, the amount of current generated by the solar cell 101 can be displayed on the ammeter 111.
Now you can know the current power generation.

【0008】[0008]

【発明が解決しようとする課題】上述したように、2次
電池が十分に充電されているか否かの確認と太陽電池が
十分に発電しているか否かの確認とは、それぞれ別々の
表示部を用いて行われていた。
As described above, the confirmation of whether or not the secondary battery is sufficiently charged and the confirmation of whether or not the solar battery is sufficiently generating power are respectively performed by different display units. It was done using.

【0009】よって、これら両方の表示を行うようにす
ると構成が大きくなってしまい、高コスト化を招くとい
う問題点を有していた。また、それぞれの表示部に対し
て各々スイッチを設けなければならないので操作性の面
で問題を有していた。
Therefore, when both of these displays are performed, the configuration becomes large, and there is a problem that the cost is increased. In addition, since a switch must be provided for each display unit, there is a problem in operability.

【0010】[0010]

【課題を解決するための手段】本発明は、外来光を受け
て起電力を発生する太陽電池と、上記太陽電池と接続し
てあり所望の電圧値以下の電圧を出力する電圧制御回路
と、上記電圧制御回路の電圧出力に基づく電流出力の所
望方向への通過を許容する整流素子と、上記整流素子を
通過した上記電流出力により充電される2次電池と、上
記太陽電池または上記2次電池により作動可能な負荷
と、上記太陽電池が直接的または間接的に制御端に接続
してあるトランジスタとを含み、上記トランジスタの出
力端とスイッチと発光素子とを直列に接続して直列回路
を形成し、上記直列回路を上記2次電池と並列に接続し
ている。よって、スイッチを操作した際に、2次電池が
十分に充電されており、かつ太陽電池が十分に発電して
いる場合だけ発光素子が発光する。つまり、1つの発光
素子で2次電池が十分に充電されているかどうかと太陽
電池が十分に発電しているかどうかの判断ができる。ま
た、スイッチを1つにできるので操作性を向上できる。
According to the present invention, there is provided a solar cell for generating an electromotive force by receiving external light, a voltage control circuit connected to the solar cell and outputting a voltage lower than a desired voltage value. A rectifier that allows a current output based on the voltage output of the voltage control circuit to pass in a desired direction; a secondary battery that is charged by the current output that has passed through the rectifier; the solar cell or the secondary battery And a transistor in which the solar cell is directly or indirectly connected to a control terminal, and a series circuit is formed by connecting an output terminal of the transistor, a switch, and a light emitting element in series. Then, the series circuit is connected in parallel with the secondary battery. Therefore, when the switch is operated, the light emitting element emits light only when the secondary battery is sufficiently charged and the solar cell is sufficiently generating power. That is, it is possible to determine whether the secondary battery is sufficiently charged by one light emitting element and whether the solar battery is sufficiently generating power. In addition, operability can be improved because only one switch can be used.

【0011】[0011]

【発明の実施の形態】本発明は、外来光を受けて起電力
を発生する太陽電池と、上記太陽電池と接続してあり所
望の電圧値以下の電圧を出力する電圧制御回路と、上記
電圧制御回路の電圧出力に基づく電流出力の所望方向へ
の通過を許容する整流素子と、上記整流素子を通過した
上記電流出力により充電される2次電池と、上記太陽電
池または上記2次電池により作動可能な負荷と、上記太
陽電池が直接的または間接的に制御端に接続してあるト
ランジスタとを含み、上記トランジスタの出力端とスイ
ッチと発光素子とを直列に接続して直列回路を形成し、
上記直列回路を上記2次電池と並列に接続している。
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a solar cell that generates an electromotive force by receiving extraneous light, a voltage control circuit that is connected to the solar cell and outputs a voltage that is equal to or lower than a desired voltage value, A rectifier that allows a current output based on the voltage output of the control circuit to pass in a desired direction, a secondary battery that is charged by the current output that has passed through the rectifier, and is operated by the solar cell or the secondary battery Possible load, including a transistor in which the solar cell is directly or indirectly connected to the control terminal, forming a series circuit by connecting the output terminal of the transistor, the switch and the light emitting element in series,
The series circuit is connected in parallel with the secondary battery.

【0012】[0012]

【実施例】図1において、太陽電池(以下「ソーラーセ
ル」という。)1は外来光を受けて起電力を発生する。
レギュレータ2は電圧制御回路を構成し、ソーラーセル
1の電圧出力によって動作し、2次電池3に許容値以上
の電圧が印加されることを防止するために上記許容値以
下の電圧を出力する。なお、電圧制御回路としてツェナ
ーダイオードを用い、これを2次電池3と並列に設けて
もよい。ダイオード4は整流素子を構成し、レギュレー
タ2の電圧出力に基づく電流出力を2次電池3に供給す
るとともに、2次電池3からソーラーセル1に電流が逆
流するのを防止する。時計回路5はICや水晶振動子な
どからなり、モータによって指針表示を行うアナログ式
の時計や液晶などで時刻を表示するデジタル時計などで
あり、負荷を構成し、スイッチ6が閉成している際、ソ
ーラーセル1または2次電池3を電源として動作する。
なお、ここでは時計回路5の最低動作電圧を2.0Vと
する。また、負荷は時計回路に限るものではなく、所望
の電子機器や電気機器等でもよく、適宜変更可能であ
る。発光素子を構成する発光ダイオード(以下「LE
D」という。)7は電圧制限素子を構成するダイオード
8と直列に接続してあり、この直列回路の一端はトラン
ジスタ9のコレクタ(出力端)と接続し、他端は2次電
池3の高電位側と接続している。トランジスタ9のエミ
ッタ(出力端)はスイッチ10を介して2次電池3の低
電位側に接続してある。つまり、トランジスタ9の出力
端とスイッチ10とLED7とダイオード8とは直列に
接続されて直列回路を形成し、この直列回路は2次電池
3と並列に接続してある。スイッチ10はさらに抵抗1
1、12を介してソーラーセル1の高電位側と接続して
おり、抵抗11と抵抗12の接続点がトランジスタ9の
ベース(制御端)に接続してある。
1, a solar cell (hereinafter referred to as "solar cell") 1 receives external light and generates an electromotive force.
The regulator 2 constitutes a voltage control circuit, operates by the voltage output of the solar cell 1, and outputs a voltage equal to or lower than the allowable value in order to prevent a voltage higher than the allowable value from being applied to the secondary battery 3. Note that a Zener diode may be used as the voltage control circuit, and may be provided in parallel with the secondary battery 3. The diode 4 constitutes a rectifying element, supplies a current output based on the voltage output of the regulator 2 to the secondary battery 3 and prevents a current from flowing backward from the secondary battery 3 to the solar cell 1. The clock circuit 5 is composed of an IC, a crystal oscillator, or the like, and is an analog clock that displays a hand by a motor, a digital clock that displays time on a liquid crystal display, or the like. At this time, it operates using the solar cell 1 or the secondary battery 3 as a power source.
Here, the minimum operating voltage of the clock circuit 5 is set to 2.0V. Further, the load is not limited to the clock circuit, but may be a desired electronic device or electric device or the like, and can be appropriately changed. A light-emitting diode (hereinafter referred to as "LE
D ". 7) is connected in series with a diode 8 constituting a voltage limiting element. One end of this series circuit is connected to the collector (output end) of the transistor 9 and the other end is connected to the high potential side of the secondary battery 3. doing. The emitter (output terminal) of the transistor 9 is connected to the low potential side of the secondary battery 3 via the switch 10. That is, the output terminal of the transistor 9, the switch 10, the LED 7, and the diode 8 are connected in series to form a series circuit, and this series circuit is connected in parallel with the secondary battery 3. The switch 10 further includes a resistor 1
It is connected to the high potential side of the solar cell 1 via 1 and 12, and the connection point between the resistors 11 and 12 is connected to the base (control terminal) of the transistor 9.

【0013】なお、ここでは時計回路5の最低動作電圧
2.0Vに関連して、LED7、ダイオード8、トラン
ジスタ9のコレクタ−エミッタ間(出力端間)にそれぞ
れ約0.7V以上の電圧が印加されたときそれぞれの素
子が電流を流すものとする。つまり、トランジスタ9が
オンしているときにLED7、ダイオード8、トランジ
スタ9の直列回路に時計回路5の最低動作電圧2.0V
よりも多少高い2.1Vの電圧が印加された際にLED
7が発光するようにしてある。なお、LED7、ダイオ
ード8、トランジスタ9の動作補償電圧は、上記のよう
にそれぞれ等しくする必要はなく、その合計値が時計回
路5の最低動作電圧よりも多少高くしてあればよい。ま
た、時計回路5の最低動作電圧も2.0Vに限るもので
はなく、適宜変更可能である。この場合、LED7、ダ
イオード8、トランジスタ9の動作補償電圧の合計値も
時計回路5の最低動作電圧に応じて適時変更可能である
ことは敢えていうまでもない。また、ダイオード8の代
わりに抵抗などの電圧制限素子を用いてもよい。
Here, in relation to the minimum operating voltage of 2.0 V of the clock circuit 5, a voltage of about 0.7 V or more is applied between the collector and the emitter (between the output terminals) of the LED 7, the diode 8 and the transistor 9. It is assumed that each element causes a current to flow when the operation is performed. That is, when the transistor 9 is on, the minimum operating voltage of the clock circuit 5 is 2.0 V in the series circuit of the LED 7, the diode 8, and the transistor 9.
LED is applied when a voltage slightly higher than 2.1V is applied.
7 emits light. Note that the operation compensation voltages of the LED 7, the diode 8, and the transistor 9 do not need to be equal to each other as described above, and it is sufficient that the total value is slightly higher than the minimum operation voltage of the clock circuit 5. Further, the minimum operating voltage of the clock circuit 5 is not limited to 2.0 V but can be changed as appropriate. In this case, it goes without saying that the total value of the operation compensation voltages of the LED 7, the diode 8, and the transistor 9 can be appropriately changed according to the minimum operation voltage of the clock circuit 5. Further, a voltage limiting element such as a resistor may be used instead of the diode 8.

【0014】次に動作を説明する。Next, the operation will be described.

【0015】まず、スイッチ6が閉成、スイッチ10が
開成している場合を説明する。
First, the case where the switch 6 is closed and the switch 10 is open will be described.

【0016】ソーラーセル1に十分光があたっている
と、ソーラーセル1は電圧出力を発生する。2次電池3
はレギュレータ2およびダイオード4を介してこの電圧
出力を受けて充電される。さらに、時計回路5はレギュ
レータ2およびダイオード4を介して供給されるソーラ
ーセル1の電圧出力を電源として駆動する。このとき、
ソーラーセル1の発電量が大きすぎて2次電池3に必要
以上の高電圧がかかり、2次電圧3の劣化、ふくれ、漏
液などが起こらないようにレギュレータ2がリミッタと
して機能する。
When the solar cell 1 is sufficiently illuminated, the solar cell 1 generates a voltage output. Secondary battery 3
Is charged by receiving this voltage output via the regulator 2 and the diode 4. Further, the clock circuit 5 drives using the voltage output of the solar cell 1 supplied through the regulator 2 and the diode 4 as a power supply. At this time,
The regulator 2 functions as a limiter so that the amount of power generated by the solar cell 1 is too large and a higher voltage than necessary is applied to the secondary battery 3 so that the secondary voltage 3 does not deteriorate, bulge, or leak.

【0017】ソーラーセル1に十分光があたっていない
場合、ソーラーセル1は十分な大きさの電圧出力を発生
しない。よって、時計回路5は2次電池3を電源として
駆動する。このとき、ダイオード4により2次電池3か
らソーラーセル1へ無駄な電流が流れないようにしてあ
る。
If the solar cell 1 is not sufficiently illuminated, the solar cell 1 will not generate a sufficiently large voltage output. Therefore, the clock circuit 5 is driven using the secondary battery 3 as a power supply. At this time, the diode 4 prevents unnecessary current from flowing from the secondary battery 3 to the solar cell 1.

【0018】このような動作を行っているうちに2次電
池3が完全に放電しきってしまった場合、ソーラーセル
1に光を照射して2次電池を充電することになるが、こ
の充電時に時計回路5による電力消費を防止して短時間
で2次電池3の充電を得られるようにするために本実施
例ではスイッチ6を設けている。つまり、2次電池3を
緊急充電させたいときにはスイッチ6を開成し、時計回
路5で電流を消費しないようにしている。
If the secondary battery 3 is completely discharged during such an operation, the solar cell 1 is irradiated with light to charge the secondary battery. In this embodiment, a switch 6 is provided in order to prevent power consumption by the clock circuit 5 and to obtain charging of the secondary battery 3 in a short time. That is, when urgent charging of the secondary battery 3 is required, the switch 6 is opened so that the clock circuit 5 does not consume current.

【0019】次にスイッチ10を閉成した場合の動作、
すなわち2次電池3が十分に充電されているかおよびソ
ーラーセル1が十分に発電しているかどうかをLED7
を用いて確認する場合の動作を説明する。
Next, the operation when the switch 10 is closed,
That is, the LED 7 determines whether the secondary battery 3 is sufficiently charged and whether the solar cell 1 is sufficiently generating power.
The operation in the case of confirming using is described.

【0020】スイッチ10を閉成すると、ソーラーセル
1の電圧が抵抗11と抵抗12とで分割される。このと
き、ソーラーセル1に十分光が照射されていると、ソー
ラーセル1から抵抗11を介してベース電流が流れ込
み、トランジスタ9がオンする。
When the switch 10 is closed, the voltage of the solar cell 1 is divided by the resistors 11 and 12. At this time, if the solar cell 1 is sufficiently irradiated with light, a base current flows from the solar cell 1 via the resistor 11, and the transistor 9 is turned on.

【0021】よって、LED7、ダイオード8、トラン
ジスタ9の出力端およびスイッチ10からなる直列回路
には2次電池3の電圧が印加される。
Therefore, the voltage of the secondary battery 3 is applied to a series circuit including the LED 7, the diode 8, the output terminal of the transistor 9, and the switch 10.

【0022】このとき、2次電池3の電圧が2.1V以
上あると上述したようにLED7が発光する。逆に、2
次電池3の電圧が2.1Vに満たないとLED7は発光
しない。
At this time, when the voltage of the secondary battery 3 is 2.1 V or more, the LED 7 emits light as described above. Conversely, 2
If the voltage of the secondary battery 3 is less than 2.1 V, the LED 7 does not emit light.

【0023】このように、LED7が発光するために
は、2次電池3が十分に充電されており、かつソーラー
セル1が十分に発電していなければならない。よって、
スイッチ10を操作した際にLED7が発光することに
よって、2次電池3が十分に充電されており、かつソー
ラーセル1が十分に発電していることが確認できる。し
たがって、1つのLEDで2次電池3が十分に充電され
ているかどうかとソーラーセル1が十分に発電している
かどうかの判断ができる。また、従来このような表示を
行う場合に必要であった2つのスイッチを1つにできる
ので操作性の向上が図れる。
As described above, in order for the LED 7 to emit light, the secondary battery 3 must be sufficiently charged, and the solar cell 1 must be sufficiently generating power. Therefore,
When the LED 7 emits light when the switch 10 is operated, it can be confirmed that the secondary battery 3 is sufficiently charged and the solar cell 1 is sufficiently generating power. Therefore, it is possible to determine whether the secondary battery 3 is sufficiently charged by one LED and whether the solar cell 1 is sufficiently generating power. Further, two switches, which are conventionally required for performing such display, can be reduced to one, thereby improving operability.

【0024】LED7が点灯しない原因がソーラーセル
1側にあるのか2次電池3側にあるのか確かめる方法と
しては、蛍光灯直下などの十分明るいところにもってい
き、スイッチ10を操作することで判断できる。具体的
には、このような状況下でスイッチ10を操作したとき
に、LED7が発光すればもとの場所が暗かったことを
示し、発光しない場合は2次電池3の電圧が低下してい
ることを示す。
As a method of confirming whether the cause of the LED 7 not illuminating is on the solar cell 1 side or the secondary battery 3 side, it is possible to judge by moving the switch to a sufficiently bright place such as directly under a fluorescent lamp and operating the switch 10. . Specifically, when the switch 10 is operated in such a situation, if the LED 7 emits light, it indicates that the original place was dark, and if it does not emit light, the voltage of the secondary battery 3 has decreased. Indicates that

【0025】なお、上述したように直列に接続してある
LED7、ダイオード8、トランジスタおよびスイッチ
10の接続順は適宜変更可能である。
The connection order of the LED 7, the diode 8, the transistor and the switch 10 connected in series as described above can be changed as appropriate.

【0026】また、本発明は時計に限るものではなく、
太陽電池を電源とする電気機器一般(例えば電卓等)に
応用可能である。
The present invention is not limited to a watch,
The present invention is applicable to general electric devices (for example, calculators and the like) using a solar cell as a power source.

【0027】さらに、上記実施例ではトランジスタ9の
制御端(ベース)と太陽電池1との間に電圧調整用の抵
抗11を介在させてあるが、必ずしも必要なものではな
い。
Further, in the above embodiment, the resistor 11 for voltage adjustment is interposed between the control terminal (base) of the transistor 9 and the solar cell 1, but it is not always necessary.

【0028】[0028]

【発明の効果】本発明によれば、スイッチを操作した際
に、2次電池が十分に充電されており、かつ太陽電池が
十分に発電している場合だけ発光素子が発光する。つま
り、1つの発光素子で2次電池が十分に充電されている
かどうかと太陽電池が十分に発電しているかどうかの判
断ができる。また、スイッチを1つにできるので操作性
を向上できる。
According to the present invention, when the switch is operated, the light emitting element emits light only when the secondary battery is sufficiently charged and the solar cell is sufficiently generating power. That is, it is possible to determine whether the secondary battery is sufficiently charged by one light emitting element and whether the solar battery is sufficiently generating power. In addition, operability can be improved because only one switch can be used.

【図面の簡単な説明】[Brief description of the drawings]

【図1】本発明の一実施例を示した回路図。FIG. 1 is a circuit diagram showing one embodiment of the present invention.

【図2】従来例を示した回路図。FIG. 2 is a circuit diagram showing a conventional example.

【図3】従来例を示した回路図。FIG. 3 is a circuit diagram showing a conventional example.

【符号の説明】[Explanation of symbols]

1 太陽電池 2 電圧制御回路 3 2次電池 4 整流素子 5 負荷 7 発光素子 9 トランジスタ 10 スイッチ 7、8、9、10 直列回路 DESCRIPTION OF SYMBOLS 1 Solar cell 2 Voltage control circuit 3 Secondary battery 4 Rectifier 5 Load 7 Light emitting element 9 Transistor 10 Switch 7, 8, 9, 10 Series circuit

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】 外来光を受けて起電力を発生する太陽電
池と、 上記太陽電池と接続してあり所望の電圧値以下の電圧を
出力する電圧制御回路と、 上記電圧制御回路の電圧出力に基づく電流出力の所望方
向への通過を許容する整流素子と、 上記整流素子を通過した上記電流出力により充電される
2次電池と、 上記太陽電池または上記2次電池により作動可能な負荷
と、 上記太陽電池が直接的または間接的に制御端に接続して
あるトランジスタとを含み、 上記トランジスタの出力端とスイッチと発光素子とを直
列に接続して直列回路を形成し、 上記直列回路を上記2次電池と並列に接続したことを特
徴とする太陽電池付き電気機器。
1. A solar cell that generates an electromotive force by receiving extraneous light, a voltage control circuit that is connected to the solar cell and outputs a voltage equal to or lower than a desired voltage value, and a voltage output of the voltage control circuit. A rectifying element that allows the current output based on the rectifying element to pass in a desired direction; a secondary battery that is charged by the current output that has passed through the rectifying element; a load that can be operated by the solar cell or the secondary battery; A solar cell including a transistor directly or indirectly connected to a control terminal, an output terminal of the transistor, a switch, and a light emitting element connected in series to form a series circuit; An electric device with a solar cell, which is connected in parallel with a secondary battery.
JP13840498A 1998-05-20 1998-05-20 Electrical equipment with solar cells Expired - Fee Related JP3455673B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13840498A JP3455673B2 (en) 1998-05-20 1998-05-20 Electrical equipment with solar cells

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13840498A JP3455673B2 (en) 1998-05-20 1998-05-20 Electrical equipment with solar cells

Publications (2)

Publication Number Publication Date
JPH11332127A true JPH11332127A (en) 1999-11-30
JP3455673B2 JP3455673B2 (en) 2003-10-14

Family

ID=15221176

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13840498A Expired - Fee Related JP3455673B2 (en) 1998-05-20 1998-05-20 Electrical equipment with solar cells

Country Status (1)

Country Link
JP (1) JP3455673B2 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011024417A1 (en) * 2009-08-24 2011-03-03 パナソニック株式会社 Terminal device and consumption current control method
US8862053B2 (en) 2006-11-28 2014-10-14 Semiconductor Energy Laboratory Co., Ltd. Semiconductor device, communication system, and method of charging the semiconductor device
JP2016025778A (en) * 2014-07-22 2016-02-08 オムロン株式会社 Power generator
US10673357B2 (en) 2015-08-28 2020-06-02 Omron Corporation Power generation device

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3105755U (en) * 2004-06-07 2004-11-25 株式会社エム・エステクノロジー Portable power supply

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8862053B2 (en) 2006-11-28 2014-10-14 Semiconductor Energy Laboratory Co., Ltd. Semiconductor device, communication system, and method of charging the semiconductor device
WO2011024417A1 (en) * 2009-08-24 2011-03-03 パナソニック株式会社 Terminal device and consumption current control method
JP2016025778A (en) * 2014-07-22 2016-02-08 オムロン株式会社 Power generator
US10673357B2 (en) 2015-08-28 2020-06-02 Omron Corporation Power generation device

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