JP2001128376A - Display device having battery as power source - Google Patents
Display device having battery as power sourceInfo
- Publication number
- JP2001128376A JP2001128376A JP30526699A JP30526699A JP2001128376A JP 2001128376 A JP2001128376 A JP 2001128376A JP 30526699 A JP30526699 A JP 30526699A JP 30526699 A JP30526699 A JP 30526699A JP 2001128376 A JP2001128376 A JP 2001128376A
- Authority
- JP
- Japan
- Prior art keywords
- battery
- voltage
- solenoid valve
- load
- turned
- 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
Links
Landscapes
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Feeding And Controlling Fuel (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Control Of El Displays (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、電池を電源とする
表示装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display device powered by a battery.
【０００２】[0002]
【従来の技術】一般に、電池を電源とする表示装置で
は、電池を電源とする表示用の発光素子の点灯方式とし
てスタティック方式やダイナミック方式が採用されてお
り、発光素子の点灯・消灯を制御する制御部が必要であ
る。つまり、制御部によって発光素子の点灯・消灯を制
御しているのが現状である。2. Description of the Related Art Generally, in a display device using a battery as a power source, a static system or a dynamic system is adopted as a lighting system of a light emitting element for display using a battery as a power source. A control unit is required. That is, at present, the control section controls the turning on and off of the light emitting elements.
【０００３】また、この種の表示装置を備えたガスコン
ロでは、電磁弁などの負荷への給電を上記制御部の制御
によって上記電源から行っているのが一般的である。[0003] In a gas stove provided with a display device of this type, power to a load such as an electromagnetic valve is generally supplied from the power supply under the control of the control unit.
【０００４】しかしながら、発光素子および負荷が同じ
電池を電源とする表示装置では、発光素子の点灯中に負
荷の動作に伴って電源の電圧が変動する（電池から負荷
へ負荷電流が流れている間は電池の内部抵抗による電圧
降下が生じ電池の電圧が一時的に低下する）と、該変動
が発光素子の明るさに影響し、発光素子がちらついてし
まうという問題がある。However, in a display device using a battery having the same light emitting element and load as a power supply, the voltage of the power supply fluctuates with the operation of the load while the light emitting element is lit (while the load current flows from the battery to the load). In this case, a voltage drop occurs due to the internal resistance of the battery, and the voltage of the battery temporarily drops.) When the variation affects the brightness of the light emitting element, the light emitting element flickers.
【０００５】この種の問題を解決するものとして、電池
よりなる電源の電圧が急激に変化した場合の発光素子の
ちらつきを抑制することを目的とした電池を電源とする
表示装置が提案されている。図７にこの表示装置の基本
構成例を示す。As a solution to this kind of problem, there has been proposed a display device using a battery as a power source for the purpose of suppressing flickering of a light emitting element when the voltage of a power source comprising the battery changes abruptly. . FIG. 7 shows a basic configuration example of this display device.
【０００６】図７に示す表示装置は、ガスコンロからな
る調理器具に設けられるものであり、図示しないガスバ
ーナ（燃焼装置）の点火、消火の手操作を行う器具栓の
操作に連動する器具栓スイッチと、調理容器の底に接触
させる温度センサによる検出温度に基づいて調理容器の
温度を調整する目的で上記ガスバーナによる火力を段階
的（例えば、大火、小火）に切り換えるためのバイパス
上に配置されるラッチ式の温調用電磁弁５と、温調用電
磁弁５を駆動する温調用電磁弁駆動回路１５と、表示用
発光素子たる可視光発光ダイオード６（以下、発光ダイ
オード６と略称する）と、発光ダイオード６を駆動する
ＬＥＤ駆動回路７と、ＬＥＤ駆動回路７を制御して発光
ダイオード６を点灯・消灯させるとともに温調用電磁弁
駆動回路５を制御して電磁弁を開閉させる制御部３’
と、発光ダイオード６および温調用電磁弁駆動回路１５
および制御部３’に給電する電池よりなる電源１と、電
源１の電圧を検出する電圧検出部たる電圧検出回路４と
を備えている。なお、ＬＥＤ駆動回路７は発光ダイオー
ド６をダイナミック方式で点灯させるための駆動回路で
あって電流制御手段を構成している。要するに、制御部
３’は上記温度センサによる検出温度に基づいて電磁弁
５を開閉制御する（オンオフ制御する）。[0006] The display device shown in FIG. 7 is provided in a cooking utensil made of a gas stove, and includes an appliance plug switch interlocked with an operation of an appliance plug for manually igniting and extinguishing a gas burner (combustion device) not shown. The gas burner is disposed on a bypass for switching the heating power in a stepwise manner (for example, a large fire or a small fire) in order to adjust the temperature of the cooking vessel based on the temperature detected by a temperature sensor brought into contact with the bottom of the cooking vessel. A latch-type temperature-controlling solenoid valve 5, a temperature-controlling solenoid valve driving circuit 15 for driving the temperature-controlling solenoid valve 5, a visible light emitting diode 6 (hereinafter, abbreviated as light emitting diode 6) as a light emitting element for display, and light emission LED driving circuit 7 for driving the diode 6, and controlling the LED driving circuit 7 to turn on / off the light emitting diode 6 and control the temperature regulating solenoid valve driving circuit 5 Control unit to open and close the solenoid valve on 3 '
And a light emitting diode 6 and a temperature control solenoid valve driving circuit 15
And a power supply 1 composed of a battery for supplying power to the control unit 3 ′, and a voltage detection circuit 4 as a voltage detection unit for detecting the voltage of the power supply 1. The LED drive circuit 7 is a drive circuit for lighting the light emitting diode 6 in a dynamic manner, and constitutes a current control means. In short, the control unit 3 'controls opening / closing of the solenoid valve 5 (on / off control) based on the temperature detected by the temperature sensor.
【０００７】制御部３’は、マイクロコンピュータであ
って、器具栓スイッチＳＷがオンすると電源１により給
電され、ＬＥＤ駆動回路７および温調用電磁弁駆動回路
１５を制御するようになっている。また、図示していな
いが、電源投入に伴って制御部３’をリセットするリセ
ット回路が設けられている。The control unit 3 'is a microcomputer, which is supplied with power from the power supply 1 when the appliance plug switch SW is turned on, and controls the LED drive circuit 7 and the temperature control solenoid valve drive circuit 15. Although not shown, a reset circuit is provided for resetting the control unit 3 'when the power is turned on.
【０００８】次に、制御部３’の動作について図８およ
び図９を参照しながら説明する。なお、図８（ａ）は電
源１の電圧、同図（ｂ）は器具栓スイッチＳＷの状態、
同図（ｃ）は温調用電磁弁５の状態、同図（ｄ）は発光
ダイオード６に流れる電流、をそれぞれ示す。Next, the operation of the control section 3 'will be described with reference to FIGS. 8A shows the voltage of the power supply 1, FIG. 8B shows the state of the appliance plug switch SW,
FIG. 3C shows the state of the temperature control solenoid valve 5, and FIG. 4D shows the current flowing through the light emitting diode 6.
【０００９】まず、図８（ｂ）に示すように時刻ｔ1に
て器具栓スイッチＳＷがオンになる（図９のＳ１１）
と、リセット回路により制御部３’がリセットされ、制
御部３’は時刻ｔ2にて温調用電磁弁５を開成させ（Ｓ
１２）、電圧検出回路４による検出電圧（この時の電源
１の電圧をＶａとする）を読み取って内蔵のメモリに記
憶する（Ｓ１３）。ここにおいて、温調用電磁弁５を開
成させると電源１から温調用電磁弁５へ負荷電流が流れ
るので、電源１である電池の内部抵抗による電圧降下が
生じ電源１の電圧が低下する。次に、制御部３’は、時
刻ｔ3にて温調用電磁弁５を閉成させ（Ｓ１４）、電圧
検出回路４による検出電圧（この時の電源１の電圧をＶ
ｂとする）を読み取って内蔵のメモリに記憶する（Ｓ１
５）。続いて、制御部３’は、電源１の電圧が上記電圧
Ｖａと上記電圧Ｖｂとのいずれの場合にも発光ダイオー
ド６に流れる電流がほぼ同じになるように、温調用電磁
弁５が開成状態（オン）の時にＬＥＤ駆動回路７を制御
する第１のパルス信号（第１の制御信号）、温調用電磁
弁５が閉成状態（オフ）の時にＬＥＤ駆動回路７を制御
する第２のパルス信号（第２の制御信号）それぞれのデ
ューティを決定する（Ｓ１６）。[0009] First, the plug fitting switch SW is turned on at time t 1 as shown in FIG. 8 (b) (S11 in FIG. 9)
When the control unit 3 'is reset, the control unit 3' by the reset circuit to the solenoid valve 5 for temperature adjustment at time t 2 is opened (S
12) The voltage detected by the voltage detection circuit 4 (the voltage of the power supply 1 at this time is defined as Va) is read and stored in a built-in memory (S13). Here, when the temperature control solenoid valve 5 is opened, a load current flows from the power supply 1 to the temperature control solenoid valve 5, so that a voltage drop occurs due to the internal resistance of the battery as the power supply 1, and the voltage of the power supply 1 decreases. Next, the control unit 3 'to close the solenoid valve 5 for temperature adjustment at time t 3 (S14), the power supply 1 voltage when the detection voltage (this by the voltage detection circuit 4 V
b) and stores it in a built-in memory (S1).
5). Subsequently, the control unit 3 'sets the temperature control solenoid valve 5 to the open state so that the current flowing through the light emitting diode 6 becomes substantially the same regardless of whether the voltage of the power supply 1 is the voltage Va or the voltage Vb. A first pulse signal (first control signal) for controlling the LED drive circuit 7 when (ON), and a second pulse for controlling the LED drive circuit 7 when the temperature control solenoid valve 5 is closed (OFF). The duty of each signal (second control signal) is determined (S16).
【００１０】その後、制御部３’は、時刻ｔ4にて発光
ダイオード６を第２の制御信号で点灯させるようにＬＥ
Ｄ駆動回路７を制御する（Ｓ１７）。以降、制御部３
は、温調用電磁弁５を開成させる場合には、温調用電磁
弁５を開成させる（オン制御する）のとほぼ同時にＬＥ
Ｄ駆動回路７を第１のパルス信号（図８（ｅ）の右側に
示すオン幅がＴ2のパルス信号）で制御し（Ｓ１８）、
温調用電磁弁５を閉成させる場合には、温調用電磁弁５
を閉成させる（オフ制御する）のとほぼ同時にＬＥＤ駆
動回路７を第２のパルス信号（図８（ｅ）の左側に示す
オン幅がＴ1のパルス信号）で制御する（Ｓ１９）。Thereafter, the control unit 3 'sets the LE so that the light emitting diode 6 is turned on at the time t 4 by the second control signal.
The D drive circuit 7 is controlled (S17). Hereinafter, the control unit 3
When the temperature control solenoid valve 5 is opened, the LE is opened almost simultaneously with opening the temperature control solenoid valve 5 (ON control).
The D driving circuit 7 first pulse signal and the control (Figure 8 (a pulse signal ON width is T 2 shown on the right side of e)) (S18),
When closing the temperature control solenoid valve 5, the temperature control solenoid valve 5
The thereby closing (off control to) the substantially the LED driving circuit 7 and the second pulse signal at the same time (on-width shown on the left side of FIG. 8 (e) is T 1 of the pulse signal) controlled by (S19).
【００１１】したがって、図８（ｄ）の時刻ｔ4〜ｔ5の
期間、時刻ｔ6〜ｔ7の期間は図８（ｅ）に示すデューテ
ィの第２のパルス信号Ａに基づいて発光ダイオード６に
電流が流れ、時刻ｔ5〜ｔ6の期間、時刻ｔ7〜ｔ8の期間
は図８（ｅ）に示すデューティの第１のパルス信号Ｂに
基づいて発光ダイオード６に電流が流れるので、図８
（ｃ）に示す温調用電磁弁５の開閉（負荷のオンオフ）
に伴って図８（ａ）に示すように電源１の電圧が変動し
ているにもかかわらず、発光ダイオード６に流れる電流
をほぼ一定（Ｉ1）に保つことができ、結果として発光
ダイオード６のちらつきが防止されるのである。ここ
に、デューティを変化させるにあたっては、周期を一定
としてオンデューティを変化させている。上記電圧Ｖａ
と上記電圧Ｖｂとの間には、Ｖａ＞Ｖｂという関係が成
り立つから、図８（ｅ）に示すように、上記電圧Ｖａに
対応付ける第２のパルス信号Ａのオン幅Ｔ1と上記電圧
Ｖｂに対応付けられる第１のパルス信号Ｂのオン幅Ｔ2
との大小関係は、Ｔ1＜Ｔ2となる。Therefore, in the period from time t 4 to t 5 and the period from time t 6 to t 7 in FIG. 8D, the light emitting diode 6 based on the second pulse signal A having the duty shown in FIG. current flows in a period of time t 5 ~t 6, the period of time t 7 ~t 8 because current to the light emitting diode 6 flows based on the first pulse signal B of duty shown in FIG. 8 (e), FIG.
Opening / closing of the temperature control solenoid valve 5 shown in FIG.
8 (a), the current flowing through the light emitting diode 6 can be kept substantially constant (I 1 ) despite the fluctuation of the voltage of the power supply 1, and as a result, the light emitting diode 6 This prevents flickering. Here, in changing the duty, the on-duty is changed while keeping the cycle constant. The above voltage Va
The between the voltage Vb, since relationship Va> Vb holds, as shown in FIG. 8 (e), the second pulse signal A of the ON width T 1 and the voltage Vb to be associated with the voltage Va ON width T 2 of the associated first pulse signal B
T 1 <T 2 .
【００１２】要するに、図７に示す構成の表示装置で
は、温調用電磁弁５の動作に伴う電源１の電圧変動にか
かわらず発光ダイオード６に流れる電流をほぼ一定に保
つことができるから、発光ダイオード６の光出力が安定
し、温調用電磁弁５の動作に伴って発光ダイオード６が
ちらつくという不具合の発生を抑制することができるの
である。In short, in the display device having the configuration shown in FIG. 7, the current flowing through the light emitting diode 6 can be kept substantially constant irrespective of the voltage fluctuation of the power supply 1 accompanying the operation of the temperature control solenoid valve 5, so that the light emitting diode The light output of the light-emitting diode 6 is stabilized, and the occurrence of the problem that the light-emitting diode 6 flickers with the operation of the temperature control solenoid valve 5 can be suppressed.
【００１３】[0013]
【発明が解決しようとする課題】上述の表示装置では、
電池の電圧が急激に変化した場合の発光素子のちらつき
を抑制することができるが、電池はアルカリ電池やマン
ガン電池などその種類によって内部抵抗が異なるので、
温調用電磁弁５の開成時（駆動時）の電源１の電圧（上
記電圧Ｖａ）が電池の種類によって相違することがあ
り、電源１として使用する電池の種別によっては発光ダ
イオード６のちらつきを十分に抑制できない場合があっ
た。In the above display device,
The flicker of the light emitting element when the voltage of the battery suddenly changes can be suppressed, but since the internal resistance of the battery varies depending on the type, such as an alkaline battery or a manganese battery,
The voltage of the power supply 1 (the above-described voltage Va) when the temperature control solenoid valve 5 is opened (during driving) may differ depending on the type of battery, and the flickering of the light emitting diode 6 may be sufficient depending on the type of battery used as the power supply 1. In some cases, it could not be suppressed.
【００１４】本発明は上記事由に鑑みて為されたもので
あり、その目的は、電池よりなる電源の電圧が急激に変
化した場合の発光素子のちらつきを電池の種類によらず
抑制することができる電池を電源とする表示装置を提供
することにある。The present invention has been made in view of the above circumstances, and an object of the present invention is to suppress flickering of a light emitting element when the voltage of a power supply composed of a battery changes abruptly irrespective of the type of battery. It is an object of the present invention to provide a display device using a battery as a power source.
【００１５】[0015]
【課題を解決するための手段】請求項１の発明は、上記
目的を達成するために、表示用発光素子および負荷に給
電する電池よりなる電源と、表示用発光素子に流れる電
流を可変とする電流制御手段と、電源の電圧を検出する
電圧検出部と、電流制御手段および負荷を制御する制御
部とを備え、制御部は、電圧検出部の出力に基づいて電
源の電池の種類を判別する判別手段を有し、電源が投入
されると負荷を一時的にオン、オフさせて負荷のオン、
オフそれぞれの状態における電圧検出部による両検出電
圧を記憶し、両検出電圧の差に基づいて電源の電池の種
別を判別し、電池の種別に応じて負荷のオン、オフにか
かわらず表示用発光素子に流れる電流がほぼ一定になる
ように負荷のオン、オフそれぞれに対応付けた第１の制
御信号、第２の制御信号を決定し、表示用発光素子を点
灯させる時には第２の制御信号に基づいて電流制御手段
を制御し、表示用発光素子の点灯中に負荷をオンさせる
時にはほぼ同時に第１の制御信号に基づいて電流制御手
段を制御し、表示用発光素子の点灯中に負荷をオフさせ
る時にはほぼ同時に第２の制御信号に基づいて電流制御
手段を制御することを特徴とするものであり、電池の種
別に応じて負荷のオン、オフにかかわらず表示用発光素
子に流れる電流がほぼ一定になるように負荷のオン、オ
フそれぞれに対応付けた第１の制御信号、第２の制御信
号が決定され、表示用発光素子の点灯中において負荷が
オンする時にはほぼ同時に電流制御手段が制御され、表
示用発光素子の点灯中において負荷がオフする時にはほ
ぼ同時に電流制御手段が制御されるので、負荷のオン、
オフによって電源電圧が変動しても表示用発光素子に流
れる電流はほぼ一定に保たれるから、負荷の影響によっ
て電源の電圧が急激に変化した場合の発光素子のちらつ
きを電池の種別によらず抑制することができる。According to a first aspect of the present invention, a power supply comprising a light emitting element for display and a battery for supplying power to a load and a current flowing through the light emitting element for display are variable. The power supply includes a current control unit, a voltage detection unit that detects a voltage of the power supply, and a control unit that controls the current control unit and the load. The control unit determines a type of a battery of the power supply based on an output of the voltage detection unit. It has a determination means, when the power is turned on, the load is temporarily turned on and off, and the load is turned on,
Stores both detected voltages by the voltage detection unit in each off state, determines the type of battery of the power supply based on the difference between the two detected voltages, and displays light for display regardless of whether the load is on or off according to the type of battery. The first control signal and the second control signal corresponding to the on and off of the load are determined so that the current flowing through the element becomes substantially constant, and the second control signal is used when the display light emitting element is turned on. When the load is turned on while the display light emitting element is turned on, the current control means is controlled based on the first control signal at substantially the same time, and the load is turned off while the display light emitting element is turned on. At the same time, the current control means is controlled on the basis of the second control signal at substantially the same time, and the current flowing through the display light-emitting element regardless of whether the load is on or off according to the type of the battery. A first control signal and a second control signal corresponding to the on and off of the load are determined so as to be substantially constant, and when the load is turned on while the display light emitting element is turned on, the current control means is almost simultaneously operated. When the load is turned off while the display light emitting element is turned on, the current control means is controlled almost at the same time.
Even if the power supply voltage fluctuates due to turning off, the current flowing through the light emitting element for display is kept almost constant, so the flicker of the light emitting element when the voltage of the power supply changes rapidly due to the load is independent of the type of battery. Can be suppressed.
【００１６】[0016]
【発明の実施の形態】本実施形態の表示装置は、図７に
示した従来構成と同様、ガスコンロからなる調理器具に
設けられるものであり、図示しないガスバーナ（燃焼装
置）の点火、消火の手操作を行う器具栓の操作に連動す
る器具栓スイッチと、調理容器の底に接触させる温度セ
ンサによる検出温度に基づいて調理容器の温度を調整す
る目的で上記ガスバーナによる火力を段階的（例えば、
大火、小火）に切り換えるためのバイパス上に配置され
るラッチ式の温調用電磁弁５と、温調用電磁弁５を駆動
する温調用電磁弁駆動回路１５と、表示用発光素子たる
可視光発光ダイオード６（以下、発光ダイオード６と略
称する）と、発光ダイオード６を駆動するＬＥＤ駆動回
路７と、ＬＥＤ駆動回路７を制御して発光ダイオード６
を点灯・消灯させるとともに温調用電磁弁駆動回路５を
制御して電磁弁を開閉させる制御部３と、発光ダイオー
ド６および温調用電磁弁駆動回路１５および制御部３に
給電する電池よりなる電源１と、電源１の電圧を検出す
る電圧検出部たる電圧検出回路４とを備えている。な
お、ＬＥＤ駆動回路７は発光ダイオード６をダイナミッ
ク方式で点灯させるための駆動回路であって電流制御手
段を構成している。要するに、制御部３は上記温度セン
サによる検出温度に基づいて電磁弁５を開閉制御する
（オンオフ制御する）。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A display device according to the present embodiment is provided in a cooking appliance formed of a gas stove, similarly to the conventional configuration shown in FIG. 7, and is used for igniting and extinguishing a gas burner (combustion device) not shown. In order to adjust the temperature of the cooking vessel based on the temperature detected by a temperature sensor that is brought into contact with the bottom of the cooking vessel and an appliance stopper switch interlocked with the operation of the appliance stopper for performing the operation, the heating power of the gas burner is gradually (for example,
A latch-type temperature-controlling solenoid valve 5 disposed on a bypass for switching between large fire and small fire), a temperature-controlling solenoid valve drive circuit 15 for driving the temperature-controlling solenoid valve 5, and visible light emission as a display light-emitting element A diode 6 (hereinafter simply referred to as a light emitting diode 6), an LED driving circuit 7 for driving the light emitting diode 6, and a light emitting diode 6 for controlling the LED driving circuit 7
And a power supply 1 comprising a light emitting diode 6, a battery for supplying power to the temperature control solenoid valve drive circuit 15 and the control unit 3 for controlling the temperature control solenoid valve drive circuit 5 to open and close the solenoid valve. And a voltage detection circuit 4 serving as a voltage detection unit for detecting the voltage of the power supply 1. The LED drive circuit 7 is a drive circuit for lighting the light emitting diode 6 in a dynamic manner, and constitutes a current control means. In short, the control unit 3 controls the opening and closing of the solenoid valve 5 based on the temperature detected by the temperature sensor (on / off control).
【００１７】制御部３は、マイクロコンピュータであっ
て、器具栓スイッチＳＷがオンすると電源１により給電
され、ＬＥＤ駆動回路７および温調用電磁弁駆動回路１
５を制御するようになっている。また、図示していない
が、電源投入に伴って制御部３をリセットするリセット
回路が設けられている。The control unit 3 is a microcomputer, which is supplied with power from the power supply 1 when the appliance plug switch SW is turned on, and is driven by the LED drive circuit 7 and the temperature control solenoid valve drive circuit 1.
5 is controlled. Although not shown, a reset circuit for resetting the control unit 3 when the power is turned on is provided.
【００１８】ところで、本実施形態の表示装置は、制御
部３が、電源１としての電池の種類を判別する判別手段
を有し、電池の種類ごとに第１の制御信号、第２の制御
信号を決定する点に特徴がある。以下、電池の種別の判
別の仕方について図２を参照しながら説明する。In the display device of the present embodiment, the control unit 3 has a determination unit for determining the type of the battery as the power supply 1, and the first control signal and the second control signal for each type of the battery. There is a feature in determining. Hereinafter, how to determine the type of battery will be described with reference to FIG.
【００１９】まず、器具栓の操作により器具栓スイッチ
ＳＷがオンになる（Ｓ１）と、リセット回路により制御
部３がリセットされ、その後、制御部３は温調用電磁弁
５へ通電を行うことで温調用電磁弁を開成させ（Ｓ
２）、電圧検出回路４による検出電圧（この時の電源１
の電圧をＶａとする）を読み取って内蔵のメモリに記憶
する（Ｓ３）。ここにおいて、温調用電磁弁のインピー
ダンスは１５Ω程度であり、温調用電磁弁５へ通電する
と電源１から温調用電磁弁５へ比較的大きな負荷電流が
流れるので、電源１である電池の内部抵抗ｒによる電圧
降下が生じ電源１の電圧が低下する。次に、制御部３
は、温調用電磁弁５への通電を停止させ（Ｓ４）、電圧
検出回路４による検出電圧（この時の電源Ｅの電圧をＶ
ｂとする）を読み取って内蔵のメモリに記憶する（Ｓ
５）。続いて、制御部３は、上記電圧Ｖａと上記電圧Ｖ
ｂとの電圧差（Ｖａ−Ｖｂ）が所定のしきい値以上であ
るか否かを判別し（Ｓ６）、上記電圧差が上記しきい値
電圧以上である場合には、電池がマンガン電池と判定し
（Ｓ７）、一方、上記電圧差が上記しきい値電圧未満で
ある場合には、電池がアルカリ電池であると判定する
（Ｓ８）。First, when the appliance plug switch SW is turned on by operating the appliance plug (S1), the control unit 3 is reset by the reset circuit. Thereafter, the control unit 3 supplies power to the temperature control solenoid valve 5 by energizing. Open the temperature control solenoid valve (S
2) The voltage detected by the voltage detection circuit 4 (the power supply 1 at this time)
Is read as Va) and stored in a built-in memory (S3). Here, the impedance of the temperature control solenoid valve is about 15Ω, and when a current is supplied to the temperature control solenoid valve 5, a relatively large load current flows from the power supply 1 to the temperature control solenoid valve 5. And the voltage of the power supply 1 decreases. Next, the control unit 3
Stops the energization of the temperature control solenoid valve 5 (S4), and detects the voltage detected by the voltage detection circuit 4 (the voltage of the power source E at this time is V
b) and stores it in the built-in memory (S
5). Subsequently, the control unit 3 sets the voltage Va and the voltage V
It is determined whether or not the voltage difference (Va−Vb) with respect to b is equal to or greater than a predetermined threshold (S6). If the voltage difference is equal to or greater than the threshold voltage, the battery is determined to be a manganese battery. It is determined (S7), while if the voltage difference is less than the threshold voltage, it is determined that the battery is an alkaline battery (S8).
【００２０】図３に電池の電圧と内部抵抗との関係を示
すが、同図中のがアルカリ電池の特性を、同図中の
がマンガン電池を、それぞれ示す。図３から同じ電池電
圧で比較すると、マンガン電池の方がアルカリ電池に比
べて内部抵抗ｒが大きく、電池電圧が小さいほど内部抵
抗ｒの差が大きくなることが分かる。つまり、電池とし
てマンガン電池を用いた場合とアルカリ電池を用いた場
合とで、上記電圧差（Ｖａ−Ｖｂ）が異なることが分か
る。図４に電池電圧と上記電圧差（Ｖａ−Ｖｂ）との関
係を示す。本実施形態では、図４の関係に基づいて上記
電圧差のしきい値電圧を０．４Ｖに設定してある。した
がって、電池の電圧が３Ｖ以下であれば、上記電圧差
（Ｖａ−Ｖｂ）としきい値とを比較することで電池の種
別を判別することができる。ここにおいて、電池の種類
を判別する判別手段は制御部３に設けられている。FIG. 3 shows the relationship between the battery voltage and the internal resistance. FIG. 3 shows the characteristics of the alkaline battery, and FIG. 3 shows the manganese battery. FIG. 3 shows that the manganese battery has a larger internal resistance r than the alkaline battery, and that the smaller the battery voltage, the larger the difference in the internal resistance r when compared at the same battery voltage. That is, it can be seen that the voltage difference (Va-Vb) is different between a case where a manganese battery is used as a battery and a case where an alkaline battery is used. FIG. 4 shows the relationship between the battery voltage and the voltage difference (Va-Vb). In the present embodiment, the threshold voltage of the voltage difference is set to 0.4 V based on the relationship shown in FIG. Therefore, if the voltage of the battery is 3 V or less, the type of the battery can be determined by comparing the voltage difference (Va-Vb) with the threshold value. Here, a determination unit for determining the type of the battery is provided in the control unit 3.
【００２１】制御部３は、以上の動作により電池の種類
を上記判別手段にて判別した後、電池の種類に応じて温
調用電磁弁５の開閉（オンオフ）に関わらず発光ダイオ
ード６に流れる電流がほぼ一定になるように負荷５がオ
ンの時にＬＥＤ駆動回路７を制御する第１のパルス信号
（第１の制御信号）、負荷５がオフの時にＬＥＤ駆動回
路７を制御する第２のパルス信号（第２の制御信号）そ
れぞれのデューティを決定する。その後は、図６の従来
構成と同様に、制御部３は、発光ダイオード６を第２の
制御信号で点灯させるようにＬＥＤ駆動回路７を制御
し、以降、制御部３は、温調用電磁弁５へ通電する（オ
ン制御する）場合には、温調用電磁弁５をオン制御する
のとほぼ同時にＬＥＤ駆動回路７を第１のパルス信号で
制御し、温調用電磁弁５への通電を停止する（オフ制御
する）場合には、温調用電磁弁５をオフ制御するのとほ
ぼ同時にＬＥＤ駆動回路７を第２のパルス信号で制御す
る。つまり、発光ダイオード６のちらつきを軽減し明る
さが一定になるようにＬＥＤ駆動回路７を制御する。After the control section 3 determines the type of battery by the above-described operation, the current flowing through the light emitting diode 6 according to the type of battery regardless of the opening / closing (on / off) of the temperature control solenoid valve 5 is determined. Is a first pulse signal (first control signal) for controlling the LED drive circuit 7 when the load 5 is on, and a second pulse for controlling the LED drive circuit 7 when the load 5 is off so that The duty of each signal (second control signal) is determined. Thereafter, similarly to the conventional configuration of FIG. 6, the control unit 3 controls the LED drive circuit 7 so that the light emitting diode 6 is turned on by the second control signal. When energizing (turning on) the LED 5, the LED drive circuit 7 is controlled by the first pulse signal almost simultaneously with turning on the temperature adjusting solenoid valve 5, and the energization to the temperature adjusting solenoid valve 5 is stopped. When the control is performed (off control), the LED drive circuit 7 is controlled by the second pulse signal almost simultaneously with the off control of the temperature control solenoid valve 5. That is, the LED driving circuit 7 is controlled so that the flicker of the light emitting diode 6 is reduced and the brightness becomes constant.
【００２２】しかして、本実施形態では、温調用電磁弁
５の開閉に伴って電源１の電圧が変動しているにもかか
わらず、かつ電池の種類によらず、発光ダイオード６に
流れる電流をほぼ一定に保つことができ、結果として発
光ダイオード６のちらつきが防止されるのである。ここ
に、デューティを変化させるにあたっては、周期を一定
としてオンデューティを変化させている。In this embodiment, however, the current flowing through the light emitting diode 6 is controlled regardless of the type of the battery, despite the fact that the voltage of the power supply 1 fluctuates with the opening and closing of the temperature control solenoid valve 5. It can be kept substantially constant, and as a result, flickering of the light emitting diode 6 is prevented. Here, in changing the duty, the on-duty is changed while keeping the cycle constant.
【００２３】例えば、図５に示すように、複数の発光ダ
イオード６1〜６2を有し、制御部３が、ＬＥＤ駆動回路
７1〜７3への出力および端子ＣＯＭ１、端子ＣＯＭ２そ
れぞれの出力を制御するように構成されている場合、制
御部３は、電圧検出回路４（図１参照）により検出され
る電源１の電圧（図６（ａ）参照）により端子ＣＯＭ
１、端子ＣＯＭ２の出力信号のオン幅ＴON1，ＴON2（図
６（ｂ）、（ｃ）参照）を変化させ、また、電池がアル
カリ電池とマンガン電池とのどちらかであるかに応じて
あらかじめ個別に設定されたＬＥＤ駆動回路７1〜７3の
制御信号を選択することでデューティを変化させる。な
お、図５中のＤＴ１，ＤＴ２は両方とも３ステートバッ
ファを示し、Ｂはバッファを示す。[0023] For example, as shown in FIG. 5, a plurality of light emitting diodes 61 through 65 2, the control unit 3, the output and the terminal COM1, the terminal COM2 of each output to the LED driving circuit 7 1-7 3 Is controlled by the control unit 3 based on the voltage of the power supply 1 (see FIG. 6A) detected by the voltage detection circuit 4 (see FIG. 1).
1, the output signal of the ON width T of the terminal COM2 ON1, T ON2 (Fig 6 (b), (c) refer) is changed. In addition, the battery depending on whether either of the alkaline batteries and manganese batteries varying the duty by selecting the control signal of the LED driving circuit 7 1-7 3 which is previously set individually. Note that both DT1 and DT2 in FIG. 5 indicate a three-state buffer, and B indicates a buffer.
【００２４】ところで、本実施形態では、電池としてア
ルカリ電池およびマンガン電池について説明したが、電
池の種類はこれらに限定されるものではなく、他の電池
を用いてもよいし、また、例えば上記しきい値を２値設
けて３つの電池の種類を判別できるようにしてもよい。In this embodiment, the alkaline battery and the manganese battery are described as batteries. However, the types of batteries are not limited to these, and other batteries may be used. Two threshold values may be provided so that the three battery types can be determined.
【００２５】[0025]
【発明の効果】請求項１の発明は、上記目的を達成する
ために、表示用発光素子および負荷に給電する電池より
なる電源と、表示用発光素子に流れる電流を可変とする
電流制御手段と、電源の電圧を検出する電圧検出部と、
電流制御手段および負荷を制御する制御部とを備え、制
御部は、電圧検出部の出力に基づいて電源の電池の種類
を判別する判別手段を有し、電源が投入されると負荷を
一時的にオン、オフさせて負荷のオン、オフそれぞれの
状態における電圧検出部による両検出電圧を記憶し、両
検出電圧の差に基づいて電源の電池の種別を判別し、電
池の種別に応じて負荷のオン、オフにかかわらず表示用
発光素子に流れる電流がほぼ一定になるように負荷のオ
ン、オフそれぞれに対応付けた第１の制御信号、第２の
制御信号を決定し、表示用発光素子を点灯させる時には
第２の制御信号に基づいて電流制御手段を制御し、表示
用発光素子の点灯中に負荷をオンさせる時にはほぼ同時
に第１の制御信号に基づいて電流制御手段を制御し、表
示用発光素子の点灯中に負荷をオフさせる時にはほぼ同
時に第２の制御信号に基づいて電流制御手段を制御する
ものであり、電池の種別に応じて負荷のオン、オフにか
かわらず表示用発光素子に流れる電流がほぼ一定になる
ように負荷のオン、オフそれぞれに対応付けた第１の制
御信号、第２の制御信号が決定され、表示用発光素子の
点灯中において負荷がオンする時にはほぼ同時に電流制
御手段が制御され、表示用発光素子の点灯中において負
荷がオフする時にはほぼ同時に電流制御手段が制御され
るので、負荷のオン、オフによって電源電圧が変動して
も表示用発光素子に流れる電流はほぼ一定に保たれるか
ら、負荷の影響によって電源の電圧が急激に変化した場
合の発光素子のちらつきを電池の種別によらず抑制する
ことができるという効果がある。According to the first aspect of the present invention, there is provided a power supply comprising a light emitting element for display and a battery for supplying power to a load, and a current control means for varying a current flowing through the light emitting element for display. A voltage detector for detecting the voltage of the power supply,
A current control unit and a control unit for controlling a load, the control unit including a determination unit for determining a type of a battery of a power supply based on an output of the voltage detection unit, and temporarily controlling the load when the power is turned on. On and off, the two voltage detections by the voltage detection unit in the on and off states of the load are stored, the battery type of the power supply is determined based on the difference between the two detection voltages, and the load is determined according to the battery type. A first control signal and a second control signal corresponding to the on and off of the load are determined so that the current flowing through the display light emitting element becomes substantially constant regardless of whether the display is on or off. When the light is turned on, the current control means is controlled based on the second control signal, and when the load is turned on while the light emitting element for display is turned on, the current control means is controlled almost simultaneously based on the first control signal, and the display is controlled. Light emitting element At the same time when the load is turned off, the current control means is controlled based on the second control signal almost simultaneously, so that the current flowing through the display light emitting element substantially depends on the type of the battery regardless of whether the load is on or off. A first control signal and a second control signal corresponding to each of the on and off of the load are determined so as to be constant, and the current control means controls the load almost simultaneously when the load is turned on while the display light emitting element is turned on. When the load is turned off while the display light emitting element is turned on, the current control means is controlled at substantially the same time, so that the current flowing through the display light emitting element is substantially constant even if the power supply voltage fluctuates due to turning on and off of the load. Therefore, it is possible to suppress the flicker of the light emitting element when the voltage of the power supply changes rapidly due to the load, regardless of the type of the battery.
【図１】実施形態を示すブロック図である。FIG. 1 is a block diagram showing an embodiment.
【図２】同上の動作説明図である。FIG. 2 is an operation explanatory view of the above.
【図３】電池の特性説明図である。FIG. 3 is an explanatory diagram of characteristics of a battery.
【図４】同上の動作説明図である。FIG. 4 is an operation explanatory diagram of the above.
【図５】同上の動作説明図である。FIG. 5 is an operation explanatory view of the above.
【図６】同上の要部回路例図である。FIG. 6 is a diagram showing an example of a main circuit of the above.
【図７】従来例を示すブロック図である。FIG. 7 is a block diagram showing a conventional example.
【図８】同上の動作説明図である。FIG. 8 is an operation explanatory view of the above.
【図９】同上の動作説明図である。FIG. 9 is an operation explanatory view of the above.
１ 電源 ３ 制御部 ４ 電圧検出回路 ５ 温調用電磁弁 ６ 発光ダイオード ７ ＬＥＤ駆動回路 ｒ 内部抵抗 ＳＷ 器具栓スイッチ DESCRIPTION OF SYMBOLS 1 Power supply 3 Control part 4 Voltage detection circuit 5 Solenoid valve for temperature control 6 Light emitting diode 7 LED drive circuit r Internal resistance SW Appliance plug switch
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ テーマコート゛(参考） // Ｇ０９Ｇ 3/20 ６１２ Ｇ０９Ｇ 3/20 ６１２Ｂ (72)発明者 八木 政彦 大阪市港区南市岡１丁目１番52号株式会社 ハーマン内 (72)発明者 守安 陽一郎 大阪市港区南市岡１丁目１番52号株式会社 ハーマン内 Ｆターム(参考） 3K068 NA04 5C080 AA07 BB09 DD06 EE28 FF03 FF09 GG02 JJ02 JJ04 JJ05 JJ07 5C094 AA07 AA51 AA54 AA56 BA23 GA10 5G003 BA01 DA02 DA15 GC05 5G435 AA00 AA19 BB04 CC09 DD11 FF11 GG23 LL03 ──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. 7 Identification FI FI Theme Court ゛ (Reference) // G09G 3/20 612 G09G 3/20 612B (72) Inventor Masahiko Yagi 1-1-1, Oka, Minami-shi, Minato-ku, Osaka-shi No. 52 Harman Co., Ltd. (72) Inventor Yoichiro Moriya 1-152 Oka, Minami-shi, Minato-ku, Osaka F-term in Harman Co., Ltd. 3K068 NA04 5C080 AA07 BB09 DD06 EE28 FF03 FF09 GG02 JJ02 JJ04 JJ05 JJ07 5C094 AA07 AA51 AA54 AA56 BA23 GA10 5G003 BA01 DA02 DA15 GC05 5G435 AA00 AA19 BB04 CC09 DD11 FF11 GG23 LL03
Claims (1)
よりなる電源と、表示用発光素子に流れる電流を可変と
する電流制御手段と、電源の電圧を検出する電圧検出部
と、電流制御手段および負荷を制御する制御部とを備
え、制御部は、電圧検出部の出力に基づいて電源の電池
の種類を判別する判別手段を有し、電源が投入されると
負荷を一時的にオン、オフさせて負荷のオン、オフそれ
ぞれの状態における電圧検出部による両検出電圧を記憶
し、両検出電圧の差に基づいて電源の電池の種別を判別
し、電池の種別に応じて負荷のオン、オフにかかわらず
表示用発光素子に流れる電流がほぼ一定になるように負
荷のオン、オフそれぞれに対応付けた第１の制御信号、
第２の制御信号を決定し、表示用発光素子を点灯させる
時には第２の制御信号に基づいて電流制御手段を制御
し、表示用発光素子の点灯中に負荷をオンさせる時には
ほぼ同時に第１の制御信号に基づいて電流制御手段を制
御し、表示用発光素子の点灯中に負荷をオフさせる時に
はほぼ同時に第２の制御信号に基づいて電流制御手段を
制御することを特徴とする電池を電源とする表示装置。1. A power supply comprising a light-emitting element for display and a battery for supplying power to a load; current control means for varying a current flowing through the light-emitting element for display; a voltage detection section for detecting a voltage of the power supply; And a control unit for controlling the load.The control unit has a determination unit for determining the type of battery of the power supply based on the output of the voltage detection unit, and temporarily turns on the load when the power is turned on. Turn off and turn on the load, store both detection voltages by the voltage detection unit in each state, determine the type of battery of the power supply based on the difference between the two detection voltages, and turn on and off the load according to the type of battery. A first control signal corresponding to each of the on and off of the load such that the current flowing through the display light emitting element becomes substantially constant regardless of the off state;
The second control signal is determined, the current control means is controlled based on the second control signal when the display light emitting element is turned on, and the first control signal is almost simultaneously turned on when the load is turned on while the display light emitting element is turned on. Controlling the current control means based on the control signal, and controlling the current control means based on the second control signal almost simultaneously when the load is turned off while the display light-emitting element is turned on. Display device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30526699A JP3993723B2 (en) | 1999-10-27 | 1999-10-27 | Display device using battery as power source |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30526699A JP3993723B2 (en) | 1999-10-27 | 1999-10-27 | Display device using battery as power source |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2001128376A true JP2001128376A (en) | 2001-05-11 |
| JP3993723B2 JP3993723B2 (en) | 2007-10-17 |
Family
ID=17943043
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP30526699A Expired - Fee Related JP3993723B2 (en) | 1999-10-27 | 1999-10-27 | Display device using battery as power source |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3993723B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009278832A (en) * | 2008-05-16 | 2009-11-26 | Hitachi Koki Co Ltd | Power supply device and power tool system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06274774A (en) * | 1993-03-19 | 1994-09-30 | Fuji Electric Co Ltd | Controller |
| JPH06307634A (en) * | 1993-04-21 | 1994-11-01 | Rinnai Corp | Combustion device |
| JPH07243644A (en) * | 1994-03-08 | 1995-09-19 | Rinnai Corp | Combustion device |
| JPH09160680A (en) * | 1995-12-05 | 1997-06-20 | Toshiba Corp | Battery-operated equipment and battery-operated equipment control method |
| JPH11191437A (en) * | 1997-12-26 | 1999-07-13 | Fuji Photo Film Co Ltd | Battery identification device and its identifying method |
-
1999
- 1999-10-27 JP JP30526699A patent/JP3993723B2/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06274774A (en) * | 1993-03-19 | 1994-09-30 | Fuji Electric Co Ltd | Controller |
| JPH06307634A (en) * | 1993-04-21 | 1994-11-01 | Rinnai Corp | Combustion device |
| JPH07243644A (en) * | 1994-03-08 | 1995-09-19 | Rinnai Corp | Combustion device |
| JPH09160680A (en) * | 1995-12-05 | 1997-06-20 | Toshiba Corp | Battery-operated equipment and battery-operated equipment control method |
| JPH11191437A (en) * | 1997-12-26 | 1999-07-13 | Fuji Photo Film Co Ltd | Battery identification device and its identifying method |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009278832A (en) * | 2008-05-16 | 2009-11-26 | Hitachi Koki Co Ltd | Power supply device and power tool system |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3993723B2 (en) | 2007-10-17 |
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