JPH05199161A - Radio selective calling receiver - Google Patents
Radio selective calling receiverInfo
- Publication number
- JPH05199161A JPH05199161A JP4026116A JP2611692A JPH05199161A JP H05199161 A JPH05199161 A JP H05199161A JP 4026116 A JP4026116 A JP 4026116A JP 2611692 A JP2611692 A JP 2611692A JP H05199161 A JPH05199161 A JP H05199161A
- Authority
- JP
- Japan
- Prior art keywords
- light emitting
- output
- emitting element
- light
- emission intensity
- 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.)
- Pending
Links
Classifications
-
- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Landscapes
- Mobile Radio Communication Systems (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、自己の呼出信号を受信
したときに呼出報知を行なう無線選択呼出受信機に関
し、特に、発光素子による明滅にて呼出報知を行なう無
線選択呼出受信機に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radio selective call receiver for giving a call notification when receiving its own call signal, and more particularly to a radio selective call receiver for giving a call notification by blinking a light emitting element.
【０００２】[0002]
【従来の技術】従来、この種の無線選択呼出受信機とし
て、発光素子と当該発光素子を明滅させる発光源駆動回
路とを備えたものが知られている。そして、自己の呼出
信号を受信したときには一定の方法で発光源駆動回路が
発光素子を明滅させていた。2. Description of the Related Art Conventionally, as a radio selective call receiver of this type, there is known a radio selective calling receiver including a light emitting element and a light emitting source drive circuit for blinking the light emitting element. Then, when the self-calling signal is received, the light emitting source drive circuit blinks the light emitting element in a certain method.
【０００３】[0003]
【発明が解決しようとする課題】上述した従来の無線選
択呼出受信機においては、発光素子の駆動方法が一定で
あるため、周囲が暗いような状態においては過度に明る
くなり、消費電力が無駄になるという課題があった。In the above-described conventional radio selective call receiver, since the method of driving the light emitting element is constant, it becomes excessively bright when the surroundings are dark and power consumption is wasted. There was a problem of becoming.
【０００４】本発明は、上記課題にかんがみてなされた
もので、消費電力を節約して電池寿命を長くすることが
可能な無線選択呼出受信機の提供を目的とする。The present invention has been made in view of the above problems, and an object of the present invention is to provide a radio selective call receiver capable of saving power consumption and extending battery life.
【０００５】[0005]
【課題を解決するための手段】上記目的を達成するた
め、請求項１にかかる発明は、発光素子による明滅にて
呼出報知を行なう無線選択呼出受信機において、周囲の
明るさを検出する検出手段と、この検出手段の出力に応
じて明るいときには上記発光素子による発光強度を弱く
するとともに暗いときには同発光強度を強くするように
制御する発光強度制御手段とを備えた構成としてある。In order to achieve the above object, the invention according to claim 1 is a radio selective calling receiver which performs call notification by blinking by a light emitting element, and detecting means for detecting ambient brightness. And a light emission intensity control means for controlling the light emission intensity of the light emitting element to be weak when the light is bright and to increase the light emission intensity when the light is dark according to the output of the detection means.
【０００６】また、請求項２にかかる発明は、請求項１
に記載の無線選択呼出受信機において、上記検出手段
を、出力が明るさに応じて連続的に変化するように構成
するとともに、上記発光強度制御手段を、上記検出手段
の出力に対応して上記発光強度を連続的に変化させるよ
うに構成してある。The invention according to claim 2 is the same as claim 1.
In the radio selective call receiver described in (1), the detection means is configured so that the output continuously changes according to the brightness, and the emission intensity control means corresponds to the output of the detection means. The emission intensity is continuously changed.
【０００７】さらに、請求項３にかかる発明は、請求項
１に記載の無線選択呼出受信機において、上記検出手段
を、出力が明るさに応じて離散的に変化するように構成
するとともに、上記発光強度制御手段を、上記検出手段
の出力に対応して上記発光強度を離散的に変化させるよ
うに構成してある。Further, in the invention according to claim 3, in the radio selective call receiver according to claim 1, the detecting means is configured so that the output discretely changes according to the brightness, and The emission intensity control means is configured to discretely change the emission intensity corresponding to the output of the detection means.
【０００８】[0008]
【作用】上記のように構成した請求項１にかかる発明に
おいては、検出手段が周囲の明るさを検出すると、この
検出手段の出力に応じて発光強度制御手段が明るいとき
には発光素子による発光強度を弱くするとともに暗いと
きには同発光強度を強くするように制御する。In the invention according to claim 1 configured as described above, when the detection means detects the ambient brightness, when the emission intensity control means is bright according to the output of the detection means, the emission intensity by the light emitting element is changed. The light emission intensity is controlled so as to be weak and dark when it is dark.
【０００９】また、上記のように構成した請求項２にか
かる発明においては、上記検出手段は明るさに応じて出
力を連続的に変化させ、上記発光強度制御手段は上記検
出手段の出力に対応して上記発光強度を連続的に変化さ
せる。Further, in the invention according to claim 2 configured as described above, the detection means continuously changes the output according to the brightness, and the emission intensity control means corresponds to the output of the detection means. Then, the emission intensity is continuously changed.
【００１０】さらに、上記のように構成した請求項３に
かかる発明においては、上記検出手段は明るさに応じて
出力を離散的に変化させ、上記発光強度制御手段は上記
検出手段の出力に対応して上記発光強度を離散的に変化
させる。すなわち、暗いときには発光強度を弱くして消
費電力を抑制する。Further, in the invention according to claim 3 configured as described above, the detection means discretely changes the output according to the brightness, and the emission intensity control means corresponds to the output of the detection means. Then, the emission intensity is discretely changed. That is, when it is dark, the light emission intensity is weakened to suppress power consumption.
【００１１】[0011]
【実施例】以下、図面にもとづいて本発明の実施例を説
明する。図１は、本発明の一実施例にかかる無線選択呼
出受信機のブロック図である。Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram of a radio selective call receiver according to an embodiment of the present invention.
【００１２】同図において、受信アンテナ１は無線部２
に接続され、同無線部２は受信アンテナ１にて受信され
た選択信号を増幅して復調する。無線部２は復調信号を
デコーダ３に出力し、同デコーダ３は呼出用の識別符号
に変換してＣＰＵ５に出力する。In FIG. 1, the receiving antenna 1 is a radio unit 2
, And the radio unit 2 amplifies and demodulates the selection signal received by the receiving antenna 1. The wireless unit 2 outputs the demodulated signal to the decoder 3, and the decoder 3 converts it into an identification code for calling and outputs it to the CPU 5.
【００１３】ＣＰＵ５はＲＯＭ４に記憶された自己の識
別符号とデコーダ３から出力される識別符号とを比較
し、一致したときには発光源駆動回路６に報知信号を出
力する。発光源駆動回路６には周囲の明るさを検出する
受光回路７が接続されており、上記ＣＰＵ５から報知信
号が入力されたときに上記受光回路７の出力に応じて発
光素子８を発光させるように駆動する。The CPU 5 compares its own identification code stored in the ROM 4 with the identification code output from the decoder 3, and outputs a notification signal to the light emitting source drive circuit 6 when they match. A light receiving circuit 7 for detecting the ambient brightness is connected to the light emitting source driving circuit 6, and when the notification signal is input from the CPU 5, the light emitting element 8 is caused to emit light according to the output of the light receiving circuit 7. Drive to.
【００１４】図２は発光源駆動回路６と発光素子８の詳
細な回路図であり、図３は受光回路７の詳細な回路図で
ある。FIG. 2 is a detailed circuit diagram of the light emitting source drive circuit 6 and the light emitting element 8, and FIG. 3 is a detailed circuit diagram of the light receiving circuit 7.
【００１５】受光回路７はフォトトランジスタ５０１を
備えており、入力光があると電源に接続された抵抗５０
３を介してコレクタからエミッタに電流が流れ、負荷抵
抗５０４を介してコレクタを電源に接続されたトランジ
スタ５０２のベースに同電流を供給する。すると、同ト
ランジスタ５０２はオンとなり、コレクタ電圧はローレ
ベルとなる。これに対し、入力光がないとフォトトラン
ジスタ５０１のコレクタからエミッタに電流が流れない
ため、トランジスタ５０２はオフとなってコレクタ電圧
はハイレベルとなる。The light receiving circuit 7 is provided with a phototransistor 501, and a resistor 50 connected to a power source when there is input light.
A current flows from the collector to the emitter via 3 and supplies the same current to the base of the transistor 502 whose collector is connected to the power supply via the load resistor 504. Then, the transistor 502 is turned on and the collector voltage becomes low level. On the other hand, if there is no input light, no current flows from the collector to the emitter of the phototransistor 501, so the transistor 502 turns off and the collector voltage becomes high level.
【００１６】発光素子８は電球で構成され、発光源駆動
回路６は、発光素子用電源出力２０４と同発光素子８と
の間に、報知信号にて作動するスイッチ素子２０１と、
受光回路７の出力にて選択的に一方のみがオンとなるス
イッチ素子２０２，２０３と同スイッチ素子２０２に直
列接続された抵抗Ｒとからなる並列回路とを介装して構
成されている。The light emitting element 8 is composed of a light bulb, and the light emitting source drive circuit 6 includes a switch element 201 which operates between the light emitting element power supply output 204 and the light emitting element 8 and which operates by a notification signal.
It is configured by interposing a parallel circuit composed of switch elements 202 and 203, one of which is selectively turned on by the output of the light receiving circuit 7, and a resistor R connected in series to the switch element 202.
【００１７】次に、上記構成からなる本実施例の動作を
説明する。自己の呼出信号を受信するとＣＰＵ５は発光
源駆動回路６に報知信号を出力するため、発光源駆動回
路６のスイッチ素子２０１は導通する。Next, the operation of this embodiment having the above structure will be described. When receiving the calling signal of its own, the CPU 5 outputs a notification signal to the light emission source drive circuit 6, so that the switch element 201 of the light emission source drive circuit 6 becomes conductive.
【００１８】いま、周囲が明るいとすると、受光回路７
の出力はローレベルとなっており、スイッチ素子２０３
が導通し、スイッチ素子２０２が非導通となる。従っ
て、発光素子用電源出力２０４と発光素子８とは直に接
続され、同発光素子８は発光素子用電源出力２０４が供
給する電力をそのまま入力して発光する。Now, assuming that the surroundings are bright, the light receiving circuit 7
Output of the switch element 203 is low level.
Becomes conductive, and the switch element 202 becomes non-conductive. Therefore, the light emitting element power output 204 and the light emitting element 8 are directly connected, and the light emitting element 8 directly receives the power supplied by the light emitting element power output 204 and emits light.
【００１９】これに対し、周囲が暗いとすると受光回路
７の出力はハイレベルとなり、スイッチ素子２０２が導
通し、スイッチ素子２０３が非導通となる。従って、発
光素子用電源出力２０４と発光素子８との間には抵抗Ｒ
が介装され、発光素子８は発光素子用電源出力２０４が
供給する電力を抵抗Ｒによる電圧降下を受けた状態で入
力することになり、弱く発光する。すなわち、消費電流
を節約することになる。On the other hand, if the surroundings are dark, the output of the light receiving circuit 7 becomes high level, the switch element 202 becomes conductive, and the switch element 203 becomes non-conductive. Therefore, a resistor R is provided between the light emitting element power source output 204 and the light emitting element 8.
The light emitting element 8 receives the power supplied from the light emitting element power source output 204 in a state of receiving a voltage drop due to the resistor R, and emits light weakly. That is, current consumption is saved.
【００２０】図４は本発明の他の実施例を示すブロック
図である。図において、昇圧回路６ａは駆動出力ｄｒｖ
が要求電圧ｒｅｑより低い間は作動し、逆になると作動
を停止する。発光素子８はＬＥＤで構成され、受光回路
７からは入力光があるときにハイレベルが出力され、入
力光がないときにローレベルが出力される。FIG. 4 is a block diagram showing another embodiment of the present invention. In the figure, the booster circuit 6a has a drive output drv.
Operates while the voltage is lower than the required voltage req, and stops when the voltage is reversed. The light emitting element 8 is composed of an LED, and the light receiving circuit 7 outputs a high level when there is input light and outputs a low level when there is no input light.
【００２１】ＣＰＵ５から報知信号が出力されたときに
周囲が明るいと受光回路７はハイレベルを出力するの
で、スイッチ素子４０１が導通し、スイッチ素子４０２
が非導通となる。すると、抵抗値の大きい抵抗Ｒ１を介
して負荷抵抗Ｒ３に電流が流れ、駆動出力ｄｒｖが高く
なって発光素子８は明るく発光する。If the surroundings are bright when the notification signal is output from the CPU 5, the light receiving circuit 7 outputs a high level, so that the switch element 401 becomes conductive and the switch element 402.
Becomes non-conducting. Then, a current flows through the load resistor R3 via the resistor R1 having a large resistance value, the drive output drv increases, and the light emitting element 8 emits bright light.
【００２２】これに対し、周囲が暗いとすると受光回路
７はローレベルを出力するので、スイッチ素子４０２が
導通し、スイッチ素子４０１は非導通となる。すると、
抵抗値の小さい抵抗Ｒ２を介して負荷抵抗Ｒ３に電流が
流れ、駆動出力ｄｒｖは低くなって発光素子８は暗く発
光する。従って、消費電流を節約する。On the other hand, when the surroundings are dark, the light receiving circuit 7 outputs a low level, so that the switch element 402 becomes conductive and the switch element 401 becomes non-conductive. Then,
A current flows through the load resistor R3 through the resistor R2 having a small resistance value, the drive output drv becomes low, and the light emitting element 8 emits dark light. Therefore, current consumption is saved.
【００２３】図５および図６は本発明の他の実施例を示
すブロック図である。図６の受光回路７において、入力
光があると抵抗５０５を介して電源入力からフォトトラ
ンジスタ５０７のコレクタよりエミッタに電流が流れ
る。この電流により抵抗５０７で入力光に応じた電圧降
下が起こり、トランジスタ５０８に流れるベース電流が
少なくなる。するとコレクタ電流も少なくなり、抵抗５
０６での電圧降下が小さくなって入力光に応じたコレク
タ電圧が出力される。5 and 6 are block diagrams showing another embodiment of the present invention. In the light receiving circuit 7 of FIG. 6, when there is input light, a current flows from the power source input through the resistor 505 to the emitter of the phototransistor 507. This current causes a voltage drop in the resistor 507 according to the input light, and the base current flowing through the transistor 508 is reduced. Then the collector current also decreases and the resistance 5
The voltage drop at 06 becomes small, and the collector voltage corresponding to the input light is output.
【００２４】一方、図５において、電圧制御発振器６ｂ
は報知信号が出力されたときに作動し、その発振周波数
は図６に示す受光回路７から出力されるコレクタ電圧に
応じて変化する。すなわち、周囲が明るいとコレクタ電
圧は高くなり、電圧制御発振器６ｂの発振周波数も高く
なるのでコイル昇圧部６ｃで高い電圧を発生して発光素
子８が明るく発光する。On the other hand, in FIG. 5, the voltage controlled oscillator 6b
Operates when a notification signal is output, and its oscillation frequency changes according to the collector voltage output from the light receiving circuit 7 shown in FIG. That is, when the surroundings are bright, the collector voltage increases, and the oscillation frequency of the voltage controlled oscillator 6b also increases, so that a high voltage is generated in the coil booster 6c and the light emitting element 8 emits bright light.
【００２５】これに対し、周囲が暗いとコレクタ電圧は
低くなるので、電圧制御発振器６ｂの発振周波数も低く
なる。すると、コイル昇圧部６ｃは低い電圧を発生して
発光素子８は暗く発光する。故に、消費電流を節約する
ことになる。On the other hand, when the surroundings are dark, the collector voltage becomes low, and the oscillation frequency of the voltage controlled oscillator 6b also becomes low. Then, the coil booster 6c generates a low voltage, and the light emitting element 8 emits dark light. Therefore, the current consumption is saved.
【００２６】[0026]
【発明の効果】以上説明したように本発明は、暗さに応
じて発光強度を弱くすることにより、消費電力を節減し
て電池寿命を長くすることが可能な無線選択呼出受信機
を提供することができる。As described above, the present invention provides a radio selective call receiver capable of saving power consumption and extending battery life by weakening light emission intensity according to darkness. be able to.
【図１】本発明の一実施例にかかる無線選択呼出受信機
のブロック図である。FIG. 1 is a block diagram of a radio selective calling receiver according to an embodiment of the present invention.
【図２】発光源駆動回路のブロック図である。FIG. 2 is a block diagram of a light source drive circuit.
【図３】受光回路のブロック図である。FIG. 3 is a block diagram of a light receiving circuit.
【図４】他の発光源駆動回路のブロック図である。FIG. 4 is a block diagram of another light emitting source drive circuit.
【図５】他の発光源駆動回路のブロック図である。FIG. 5 is a block diagram of another light emitting source drive circuit.
【図６】他の受光回路のブロック図である。FIG. 6 is a block diagram of another light receiving circuit.
６…発光源駆動回路 ６ａ…昇圧回路 ６ｂ…電圧制御発振器 ６ｃ…コイル昇圧部 ７…受光回路 ８…発光素子 Ｒ１…抵抗 Ｒ２…抵抗 Ｒ３…負荷抵抗 ２０１…スイッチ素子 ２０２，２０３…スイッチ素子 ２０４…発光素子用電源出力 ４０１，４０２…スイッチ素子 ５０１，５０７…フォトトランジスタ ５０２，５０８…トランジスタ ５０３，５０５，５０６…抵抗 ５０４…負荷抵抗 6 ... Light source drive circuit 6a ... Boost circuit 6b ... Voltage controlled oscillator 6c ... Coil boost section 7 ... Light receiving circuit 8 ... Light emitting element R1 ... Resistor R2 ... Resistor R3 ... Load resistor 201 ... Switch element 202, 203 ... Switch element 204 ... Light source output 401, 402 ... Switch element 501, 507 ... Phototransistor 502, 508 ... Transistor 503, 505, 506 ... Resistor 504 ... Load resistor
─────────────────────────────────────────────────────
─────────────────────────────────────────────────── ───
【手続補正書】[Procedure amendment]
【提出日】平成４年６月２３日[Submission date] June 23, 1992
【手続補正１】[Procedure Amendment 1]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】請求項１[Name of item to be corrected] Claim 1
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
【手続補正２】[Procedure Amendment 2]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】０００５[Correction target item name] 0005
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
【０００５】[0005]
【課題を解決するための手段】上記目的を達成するた
め、請求項１にかかる発明は、発光素子による明滅にて
呼出報知を行なう無線選択呼出受信機において、周囲の
明るさを検出する検出手段と、この検出手段の出力に応
じて、明るいときには上記発光素子による発光強度を強
くし、暗いときには同発光強度を弱くするように制御す
る発光強度制御手段とを備えた構成としてある。In order to achieve the above object, the invention according to claim 1 is a radio selective calling receiver which performs call notification by blinking by a light emitting element, and detecting means for detecting ambient brightness. And a light emission intensity control means for controlling the light emission intensity of the light emitting element to be increased when the light is bright and to be reduced when the light is dark according to the output of the detection means.
【手続補正３】[Procedure amendment 3]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】０００８[Correction target item name] 0008
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
【０００８】[0008]
【作用】上記のように構成した請求項１にかかる発明に
おいては、検出手段が周囲の明るさを検出すると、発光
強度制御手段が、上記検出手段の出力に応じて周囲の明
るさが明るいときには発光素子による発光強度を強く
し、暗いときには同発光強度を弱くするように制御す
る。In the invention according to claim 1 configured as described above, when the detection means detects the ambient brightness, the emission intensity control means determines that the ambient brightness is bright according to the output of the detection means. The intensity of light emitted from the light emitting element is increased, and the intensity of light emission is controlled to be weak when the light is dark.
Claims (3)
う無線選択呼出受信機において、 周囲の明るさを検出する検出手段と、 この検出手段の出力に応じて明るいときには上記発光素
子による発光強度を弱くするとともに暗いときには同発
光強度を強くするように制御する発光強度制御手段とを
具備することを特徴とする無線選択呼出受信機。1. A radio selective call receiver which gives a call notification by blinking by a light emitting element, and a detecting means for detecting ambient brightness, and a light emitting intensity by the light emitting element when the light is bright according to the output of the detecting means. A radio selective calling receiver comprising: a light emission intensity control means for controlling the light emission intensity to be weakened and to be increased when it is dark.
機において、上記検出手段を、出力が明るさに応じて連
続的に変化するように構成するとともに、上記発光強度
制御手段を、上記検出手段の出力に対応して上記発光強
度を連続的に変化させるように構成したことを特徴とす
る無線選択呼出受信機。2. The radio selective call receiver according to claim 1, wherein the detection means is configured so that the output continuously changes according to the brightness, and the emission intensity control means includes the light emission intensity control means. A radio selective call receiver characterized in that the emission intensity is continuously changed in accordance with the output of the detecting means.
機において、上記検出手段を、出力が明るさに応じて離
散的に変化するように構成するとともに、上記発光強度
制御手段を、上記検出手段の出力に対応して上記発光強
度を離散的に変化させるように構成したことを特徴とす
る無線選択呼出受信機。3. The radio selective call receiver according to claim 1, wherein the detecting means is configured so that the output discretely changes according to the brightness, and the light emission intensity control means includes the light emitting intensity control means. A radio selective calling receiver, characterized in that the emission intensity is discretely changed according to the output of the detecting means.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4026116A JPH05199161A (en) | 1992-01-17 | 1992-01-17 | Radio selective calling receiver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4026116A JPH05199161A (en) | 1992-01-17 | 1992-01-17 | Radio selective calling receiver |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH05199161A true JPH05199161A (en) | 1993-08-06 |
Family
ID=12184613
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4026116A Pending JPH05199161A (en) | 1992-01-17 | 1992-01-17 | Radio selective calling receiver |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH05199161A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5248308B2 (en) * | 1973-11-09 | 1977-12-08 | ||
| JPH037433A (en) * | 1989-06-05 | 1991-01-14 | Nec Corp | Radio selective call receiver |
-
1992
- 1992-01-17 JP JP4026116A patent/JPH05199161A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5248308B2 (en) * | 1973-11-09 | 1977-12-08 | ||
| JPH037433A (en) * | 1989-06-05 | 1991-01-14 | Nec Corp | Radio selective call receiver |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5744984A (en) | Driver circuit providing controllable battery overload protection | |
| US7482763B2 (en) | Non-PWM vehicle lamp dimming arrangement | |
| JPH0738933A (en) | Individual selective call receiver | |
| JPH05199161A (en) | Radio selective calling receiver | |
| JP5207327B2 (en) | LED driving device and LED driving control method | |
| US20060250091A1 (en) | Lighting circuit for light-emitting diode and control method thereof | |
| KR100953009B1 (en) | Remote control transmitter | |
| JP2008294992A (en) | Wireless transmitter | |
| JP3736037B2 (en) | Lighting control device | |
| JPH037433A (en) | Radio selective call receiver | |
| JPH0563752B2 (en) | ||
| US4089157A (en) | Digital clock for motor vehicles | |
| JP2011033814A (en) | Display device | |
| JPH10269884A (en) | Back-light control device for key operating part | |
| KR200200366Y1 (en) | Automatic switching device of lamp | |
| JP2005004267A (en) | Gas leak alarm and lighting control method | |
| JPH09207662A (en) | Light modulating device | |
| JP3975800B2 (en) | Light control device for vehicle | |
| JP2000180217A (en) | Vehicular dimming control circuit | |
| KR20040051861A (en) | Theme led device | |
| KR920007015Y1 (en) | Function key display turning lights circuit of vtr | |
| KR200168595Y1 (en) | A Beeper having multifunction | |
| JPH07228186A (en) | Headlight control device | |
| JP2002184586A (en) | Lighting device and its control method | |
| JPH11311965A (en) | Display for battery operated equipment |