JPH08204595A - Radio communication equipment - Google Patents
Radio communication equipmentInfo
- Publication number
- JPH08204595A JPH08204595A JP7010535A JP1053595A JPH08204595A JP H08204595 A JPH08204595 A JP H08204595A JP 7010535 A JP7010535 A JP 7010535A JP 1053595 A JP1053595 A JP 1053595A JP H08204595 A JPH08204595 A JP H08204595A
- Authority
- JP
- Japan
- Prior art keywords
- power supply
- time
- wireless communication
- equipment
- power source
- 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
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
Abstract
Description
【0001】[0001]
【産業上の利用分野】本発明は無線通信装置に関し、特
に電源制御により装置本体に電源を供給する主電源の消
耗を低減した無線通信装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wireless communication device, and more particularly to a wireless communication device in which consumption of a main power supply for supplying power to the device main body by power control is reduced.
【0002】[0002]
【従来の技術】無線通信装置は基地局から発射される電
波を受信し、この電波に乗って送信される制御チャネル
を取得し、基地局からの呼出しを常時受信可能な状態で
ある待受け状態に入る。2. Description of the Related Art A radio communication device receives a radio wave emitted from a base station, acquires a control channel transmitted on the radio wave, and enters a standby state in which a call from the base station can always be received. enter.
【0003】この待受け状態は無線通信装置が基地局か
らの電波を必要十分に受信することができる状態でなけ
ればならない。This standby state must be a state in which the radio communication device can sufficiently and sufficiently receive the radio waves from the base station.
【0004】一方、移動する無線通信装置は基地局から
の電波をいつも安定に受信しているとは限らない。例え
ば、基地局からの電波の到達距離を超えた領域に移動し
たときや、地下等の電波が遮断される場所へ移動したと
きには、基地局からの電波を受信することができず待受
け状態から離脱する。これを「圏外にある」と言う。On the other hand, mobile radio communication devices do not always receive radio waves from base stations in a stable manner. For example, when moving to an area beyond the reach of radio waves from the base station, or when moving to a location where the radio waves are blocked, such as underground, the radio waves from the base station cannot be received and the mobile station leaves the standby state. To do. This is called "out of service".
【0005】このように、無線通信装置が待受け状態か
ら離脱すると、その無線通信装置は受信周波数を切り替
えて他の制御チャネルを取得するための、所謂チャネル
スキャンを行う。As described above, when the wireless communication device leaves the standby state, the wireless communication device performs a so-called channel scan for switching the reception frequency to acquire another control channel.
【0006】したがって、基地局の圏外にある無線通信
装置は、電波を受信可能な圏内に移動するまでチャネル
スキャンを繰り返すことになる。Therefore, the wireless communication device outside the range of the base station repeats the channel scan until it moves into the range where radio waves can be received.
【0007】従来は、無線通信装置が圏外にあるためチ
ャネルスキャンをある一定時間繰り返したときには、チ
ャネルスキャンを止めて受信部のみの電源をある一定時
間オフにしていた。Conventionally, since the wireless communication device is out of service, when the channel scan is repeated for a certain period of time, the channel scan is stopped and the power supply of only the receiving section is turned off for a certain period of time.
【0008】そして、この電源オフの状態が所定時間継
続すると、受信部への供給電源を再びオンにしてチャネ
ルスキャンを再開し、その後も引続き無線通信装置が圏
外にあるときには、この受信部電源のオン/オフ制御を
繰り返していた。When the power-off state continues for a predetermined time, the power supply to the receiving unit is turned on again to restart the channel scan. After that, when the wireless communication device is still out of range, the receiving unit power supply is turned off. The on / off control was repeated.
【0009】[0009]
【発明が解決しようとする課題】この従来の無線通信装
置では、圏外にある間は、受信部のみへの供給電源をで
きるだけ切断するようにしているが、装置全体への供給
電源はいつもオン状態になっていた。In this conventional wireless communication device, the power supply to only the receiving section is cut off as much as possible while it is out of the service area, but the power supply to the entire device is always in the ON state. It was.
【0010】したがって、無線通信装置が圏外にあって
もその装置内の受信部を除く各回路では電流を消費して
おり、この圏外の状態が永続すると、供給電源のバッテ
リの消耗が促進されて無線通信装置の使用可能時間を短
縮させるという問題点があった。Therefore, even if the wireless communication device is out of the service area, each circuit other than the receiving unit in the device consumes current, and if the out-of-service condition persists, the consumption of the battery of the power supply is accelerated. There is a problem that the usable time of the wireless communication device is shortened.
【0011】本発明の目的は、無線通信装置が圏外にあ
る状態が継続したときにユーザによる操作無しで装置本
体の電源を一時的にオフすることにより装置本体への供
給電源である主電源のバッテリの消耗を低減させるよう
にした無線通信装置を提供することにある。An object of the present invention is to provide a main power supply which is a power supply to the apparatus main body by temporarily turning off the power of the apparatus main body without user's operation when the wireless communication apparatus continues to be out of range. Another object of the present invention is to provide a wireless communication device that reduces battery consumption.
【0012】[0012]
【課題を解決するための手段】本発明によれば、基地局
からの電波を受信することが不可能であることを検出す
る検出手段と、この検出手段が前記電波の受信不可能を
検出した時に計測を開始する計測手段と、この計測手段
による計測値があらかじめ設定した値を超えた時点で装
置本体への供給電源を切断する装置電源制御手段とを備
えることを特徴とする無線通信装置が得られる。According to the present invention, a detecting means for detecting that it is impossible to receive a radio wave from a base station, and the detecting means detects the inability to receive the radio wave. A wireless communication device characterized by comprising a measurement means for starting measurement at times and a device power supply control means for cutting off the power supply to the device body when the value measured by the measurement means exceeds a preset value. can get.
【0013】また、前記装置電源制御手段は前記装置本
体への供給電源とは別のバックアップ電源から所要の電
源を供給されることを特徴とする無線通信装置が得られ
る。Further, there can be obtained a wireless communication device characterized in that the device power supply control means is supplied with required power from a backup power supply different from the power supply to the device body.
【0014】さらに、前記計測手段は受信部への供給電
源の断・接の繰返し回数があらかじめ設定した回数を超
えた時点で前記装置電源制御手段に前記装置本体への供
給電源切断指示を行う計数手段であっても良いし、ある
いは、受信部への初回の供給電源断からの計測時間があ
らかじめ設定した時間を超えた時点で前記装置電源制御
手段に前記装置本体への供給電源切断指示を行う計時手
段であっても良い。Further, the counting means issues a command to the apparatus power supply control means to cut off the power supply to the apparatus main body when the number of times of repeating disconnection / connection of the power supply to the receiving section exceeds a preset number. Alternatively, the device power supply control means may be instructed to cut off the power supply to the device main body when the measurement time from the first power off to the receiving unit exceeds a preset time. It may be a timekeeping means.
【0015】さらにまた、前記装置電源制御手段が前記
装置本体への電源供給を切断した時に計測を開始する第
2の計時手段を備え、この第2の計時手段による計測時
間があらかじめ設定した時間を超えた時点で前記装置電
源制御手段は前記装置本体への電源供給を再開すること
を特徴とする無線通信装置が得られる。Furthermore, the apparatus power source control means is provided with a second time measuring means for starting measurement when the power supply to the apparatus main body is cut off, and the time measured by the second time measuring means is set to a preset time. A wireless communication device is obtained in which the device power supply control means restarts power supply to the device main body when the power is exceeded.
【0016】[0016]
【実施例】次に、本発明について図面を参照して説明す
る。Next, the present invention will be described with reference to the drawings.
【0017】図1は本発明の無線通信装置の一実施例に
おける電源制御部分を示すブロック図である。FIG. 1 is a block diagram showing a power supply control section in an embodiment of a wireless communication apparatus of the present invention.
【0018】図1を参照すると、本実施例は基地局から
の電波を空中線を通して受信する受信部1と、受信部1
からの受信信号11を受けて各回路への電源供給の制御
を行う制御部2と、制御部2からの制御信号13により
受信部1への電源供給を行う受信部電源供給部3と、装
置本体に電源を供給する主電源(主電池)8とは別系統
のバックアップ電源6から電源を供給され制御部2から
の制御信号12または電源スイッチ5の操作により装置
本体への電源オン,オフ状態の制御を行う装置電源制御
部4と、装置電源制御部4からの制御信号14により主
電源8から装置本体へ電源供給を行う装置電源供給部7
とを備えている。Referring to FIG. 1, in this embodiment, a receiving unit 1 for receiving radio waves from a base station through an antenna, and a receiving unit 1.
A control unit 2 which receives a reception signal 11 from the control unit 2 to control power supply to each circuit, a reception unit power supply unit 3 which supplies power to the reception unit 1 according to a control signal 13 from the control unit 2, and an apparatus. Power is supplied from a backup power supply 6 that is separate from the main power supply (main battery) 8 that supplies power to the main body, and a power supply to the device main body is turned on or off by operating the control signal 12 from the control unit 2 or the power switch 5. And a device power supply controller 7 for supplying power from the main power supply 8 to the device body according to a control signal 14 from the device power supply controller 4.
It has and.
【0019】なお、装置本体が電源オフ状態であって
も、バックアップ電源6が装置電源制御部4を駆動させ
るだけの電圧を有していれば装置電源制御部4のみは電
源がオン状態になっている。Even if the apparatus main body is in the power-off state, if the backup power supply 6 has a voltage enough to drive the apparatus power-supply control section 4, only the apparatus power-supply control section 4 is turned on. ing.
【0020】次に、本実施例の動作について図2および
図3を併用して説明する。Next, the operation of this embodiment will be described with reference to FIGS.
【0021】図2は図1における受信部電源のオン,オ
フ状態と装置本体電源のオン,オフ状態とを示すタイミ
ングチャート、図3は本実施例の動作手順を示すフロー
チャートである。FIG. 2 is a timing chart showing the ON / OFF state of the power supply of the receiver and the ON / OFF state of the power supply of the apparatus main body in FIG. 1, and FIG. 3 is a flowchart showing the operation procedure of this embodiment.
【0022】制御部2は受信部1からの受信信号11に
よって自無線通信装置が圏外にあるかどうかを判定する
(ステップS1)。The control unit 2 determines from the received signal 11 from the receiving unit 1 whether or not the own wireless communication device is out of range (step S1).
【0023】ここで、圏外にあれば(S1でYES)チ
ャネルスキャン動作(S4)および受信部電源オフ動作
(S8)を繰り返す回数N1を設定する(S2)ととも
にチャネルスキャン動作時間T1のタイマ設定を行う
(S3)。If it is out of range (YES in S1), the number of times N1 for repeating the channel scan operation (S4) and the receiver power-off operation (S8) is set (S2), and the timer for the channel scan operation time T1 is set. Perform (S3).
【0024】そして、チャネルスキャン動作を行い(S
4)、基地局からの電波を受信して制御チャネルを獲得
することができれば(S5でYES)、チャネルスキャ
ン動作時間T1をリセットして(S17)待受け状態と
なる(S18)。Then, a channel scan operation is performed (S
4) If the control channel can be acquired by receiving the radio wave from the base station (YES in S5), the channel scan operation time T1 is reset (S17) and the standby state is set (S18).
【0025】また、基地局からの電波を受信できず、し
たがって制御チャネルを獲得することができずに(S5
でNO)チャネルスキャン動作時間T1が経過すると
(S6でYES).受信部電源オフ継続時間T2のタイ
マ設定を行った後(S7)、受信部電源オフ動作を行う
(S8)。Further, since the radio wave from the base station cannot be received, the control channel cannot be acquired (S5
NO) when the channel scan operation time T1 has elapsed (YES in S6). After setting the timer of the receiver power off duration T2 (S7), the receiver power off operation is performed (S8).
【0026】そして、この状態で受信部電源オフ継続時
間T2が経過すると(S9でYES)、受信部1の電源
をオンにして(S10)、回数N1の値を−1する(S
11)。When the receiver power-off duration T2 elapses in this state (YES in S9), the receiver 1 is powered on (S10), and the value of the number N1 is decreased by -1 (S).
11).
【0027】この動作をN1回繰り返してN1=0にな
ると(S12でYES)、装置本体電源オフ継続時間T
3をタイマ設定し(S13)、制御部2は制御信号12
によって装置電源制御部4へ装置本体電源のオフを指示
するとともに設定した装置本体電源オフ継続時間T3を
伝える。When this operation is repeated N1 times and N1 = 0 (YES in S12), the apparatus main body power-off continuation time T
3 is set as the timer (S13), and the control unit 2 sets the control signal 12
Instruct the device power supply controller 4 to turn off the power supply of the device main body and to inform the set power off duration T3 of the device main body.
【0028】この指示を受けた装置電源制御部4が制御
信号14を装置電源供給部7に送ると、装置電源供給部
7は直ちに装置本体への電源供給をオフし(S14)、
この状態で装置本体電源オフ継続時間T3が経過する
と、装置本体への電源供給を再びオンにする(S1
6)。Upon receiving this instruction, the device power supply control unit 4 sends a control signal 14 to the device power supply unit 7, and the device power supply unit 7 immediately turns off the power supply to the device body (S14).
When the apparatus main body power-off continuation time T3 elapses in this state, the power supply to the apparatus main body is turned on again (S1).
6).
【0029】また、この装置本体電源オフ継続時間T3
が経過する前にユーザが電源スイッチ5を操作すれば、
装置本体への電源供給を強制的にオンにすることができ
る。Further, this apparatus main body power-off continuation time T3
If the user operates the power switch 5 before the
The power supply to the device body can be forcibly turned on.
【0030】なお、上記説明では、計数手段によりS3
からS11までの手順をN1回繰り返すことによって装
置本体への電源供給をオフしているが、計測手段として
計時手段を用いて所定時間の経過後に装置本体への電源
供給をオフするように構成しても良い。In the above description, the counting means S3 is used.
The power supply to the apparatus main body is turned off by repeating the procedure from S1 to S11 N1 times, but the power supply to the apparatus main body is turned off after the elapse of a predetermined time by using the time measuring means as the measuring means. May be.
【0031】[0031]
【発明の効果】以上説明したように本発明は、基地局か
らの電波を受信することが不可能であることを検出する
検出手段と、この検出手段が電波の受信不可能を検出し
た時に計測を開始する計測手段と、この計測手段による
計測値があらかじめ設定した値を超えた時点で装置本体
への供給電源を切断する装置電源制御手段とを備えるこ
とにより、無線通信装置が圏外にある状態が継続したと
きにユーザによる操作無しで装置本体の電源を一時的に
オフするので、装置本体への供給電源である主電源バッ
テリの消耗を低減させることができるという効果を有す
る。As described above, according to the present invention, the detection means for detecting the inability to receive the radio wave from the base station and the measurement when the detection means detects the radio wave inability to be received. A state in which the wireless communication device is out of range by including a measuring means for starting the operation and a device power control means for cutting off the power supply to the device body when the value measured by the measuring means exceeds a preset value. Since the power of the main body of the apparatus is temporarily turned off without any operation by the user when continues, there is an effect that it is possible to reduce consumption of the main power supply battery that is the power supply to the main body of the apparatus.
【0032】また、装置電源制御手段が装置本体への電
源供給を切断した時に計測を開始する第2の計時手段を
備え、この第2の計時手段による計測時間があらかじめ
設定した時間を超えた時点で装置電源制御手段は装置本
体への電源供給を再開することにより、電波の受信状態
が変化して受信可能になり得る時間が経過したときに再
び装置本体への電源供給をオンするので、所定の時間後
に無線通信装置を待受け状態に入れることができるとい
う効果を有する。Further, the apparatus power supply control means is provided with a second timing means for starting measurement when the power supply to the apparatus main body is cut off, and when the time measured by the second timing means exceeds a preset time. The device power supply control means restarts the power supply to the device main body, so that the power supply to the device main body is turned on again when the time in which the reception state of the radio wave is changed and the signal can be received has passed. This has the effect that the wireless communication device can be put into the standby state after the time.
【図1】本発明の無線通信装置の一実施例における電源
制御部分を示すブロック図である。FIG. 1 is a block diagram showing a power supply control section in an embodiment of a wireless communication apparatus of the present invention.
【図2】図1における受信部電源のオン,オフ状態と装
置本体電源のオン,オフ状態とを示すタイミングチャー
トである。FIG. 2 is a timing chart showing an on / off state of the power supply of the receiving section and an on / off state of the power supply of the apparatus main body in FIG.
【図3】本実施例の動作手順を示すフローチャートであ
る。FIG. 3 is a flowchart showing an operation procedure of this embodiment.
1 受信部 2 制御部 3 受信部電源供給部 4 装置電源制御部 5 電源スイッチ 6 バックアップ電源 7 装置電源供給部 8 主電源 11 受信信号 12,13,14 制御信号 N1 回数 T1 チャネルスキャン動作時間 T2 受信部電源オフ継続時間 T3 装置本体電源オフ継続時間 1 receiver 2 control unit 3 receiver power supply unit 4 device power supply control unit 5 power switch 6 backup power supply 7 device power supply unit 8 main power supply 11 received signal 12, 13, 14 control signal N1 number of times T1 channel scan operation time T2 reception Part power off duration T3 Device power off duration
Claims (5)
能であることを検出する検出手段と、この検出手段が前
記電波の受信不可能を検出した時に計測を開始する計測
手段と、この計測手段による計測値があらかじめ設定し
た値を超えた時点で装置本体への供給電源を切断する装
置電源制御手段とを備えることを特徴とする無線通信装
置。1. A detection means for detecting that it is impossible to receive a radio wave from a base station, a measurement means for starting measurement when the detection means detects that the radio wave cannot be received, A wireless communication device, comprising: a device power supply control device that cuts off power supply to the device body when a value measured by the measurement device exceeds a preset value.
の供給電源とは別のバックアップ電源から所要の電源を
供給されることを特徴とする請求項1記載の無線通信装
置。2. The wireless communication device according to claim 1, wherein the device power supply control means is supplied with required power from a backup power supply different from a power supply to the device body.
・接の繰返し回数があらかじめ設定した回数を超えた時
点で前記装置電源制御手段に前記装置本体への供給電源
切断指示を行う計数手段であることを特徴とする請求項
1記載の無線通信装置。3. The counting means for instructing the device power supply control device to cut off the power supply to the device body when the number of times of repeating disconnection and connection of the power supply to the receiving unit exceeds a preset number. The wireless communication device according to claim 1, wherein the wireless communication device is means.
源断からの計測時間があらかじめ設定した時間を超えた
時点で前記装置電源制御手段に前記装置本体への供給電
源切断指示を行う計時手段であることを特徴とする請求
項1記載の無線通信装置。4. The timekeeping for instructing the device power supply control device to cut off the power supply to the device main body when the measuring time exceeds a preset time from the first power-off to the receiving unit. The wireless communication device according to claim 1, wherein the wireless communication device is means.
の電源供給を切断した時に計測を開始する第2の計時手
段を備え、この第2の計時手段による計測時間があらか
じめ設定した時間を超えた時点で前記装置電源制御手段
は前記装置本体への電源供給を再開することを特徴とす
る請求項1乃至4のいずれかに記載の無線通信装置。5. The apparatus power source control means comprises a second timing means for starting measurement when the power supply to the apparatus main body is cut off, and the time measured by the second timing means exceeds a preset time. The wireless communication device according to any one of claims 1 to 4, wherein the device power supply control means restarts power supply to the device body at the point of time.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP07010535A JP3119565B2 (en) | 1995-01-26 | 1995-01-26 | Wireless communication device |
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---|---|---|---|
JP07010535A JP3119565B2 (en) | 1995-01-26 | 1995-01-26 | Wireless communication device |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP9286760A Division JPH1093502A (en) | 1997-10-20 | 1997-10-20 | Radio communication equipment |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH08204595A true JPH08204595A (en) | 1996-08-09 |
JP3119565B2 JP3119565B2 (en) | 2000-12-25 |
Family
ID=11752963
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP07010535A Expired - Fee Related JP3119565B2 (en) | 1995-01-26 | 1995-01-26 | Wireless communication device |
Country Status (1)
Country | Link |
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JP (1) | JP3119565B2 (en) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100318963B1 (en) * | 1998-11-13 | 2002-03-20 | 윤종용 | How to reduce power consumption of wireless terminal |
KR20040049715A (en) * | 2002-12-07 | 2004-06-12 | 엘지전자 주식회사 | Apparatus and method for controlling power of mobile communication terminal |
KR100594006B1 (en) * | 1999-06-08 | 2006-06-28 | 삼성전자주식회사 | How to reduce power consumption of wireless terminal |
JP2007214862A (en) * | 2006-02-09 | 2007-08-23 | Matsushita Electric Ind Co Ltd | Power supply control method in digital broadcasting receiver |
JP2007259479A (en) * | 2007-05-09 | 2007-10-04 | Toshiba Corp | Mobile station |
USRE41833E1 (en) | 1996-11-11 | 2010-10-19 | Dowa Holdings Co., Ltd. | Display device with a transparent optical filter |
US7890148B2 (en) | 1999-09-29 | 2011-02-15 | Fujitsu Toshiba Mobile Communications Limited | Mobile station used for CDMA mobile communication systems |
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JPS58166157U (en) * | 1982-04-28 | 1983-11-05 | 三菱電機株式会社 | broadcast receiver |
JPS58186638U (en) * | 1982-06-04 | 1983-12-12 | 株式会社富士通ゼネラル | Receiving device power control circuit |
JPS62295520A (en) * | 1986-06-14 | 1987-12-22 | Matsushita Electric Works Ltd | Cordless interphone set |
JPH04360426A (en) * | 1991-06-07 | 1992-12-14 | Koa Corp | Receiver |
JPH0720964A (en) * | 1993-06-30 | 1995-01-24 | Kokusai Electric Co Ltd | Electric power saving circuit and its control method |
JP3094839U (en) * | 2002-12-24 | 2003-07-04 | ホクレン農業協同組合連合会 | Waterproof compost |
-
1995
- 1995-01-26 JP JP07010535A patent/JP3119565B2/en not_active Expired - Fee Related
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58166157U (en) * | 1982-04-28 | 1983-11-05 | 三菱電機株式会社 | broadcast receiver |
JPS58186638U (en) * | 1982-06-04 | 1983-12-12 | 株式会社富士通ゼネラル | Receiving device power control circuit |
JPS62295520A (en) * | 1986-06-14 | 1987-12-22 | Matsushita Electric Works Ltd | Cordless interphone set |
JPH04360426A (en) * | 1991-06-07 | 1992-12-14 | Koa Corp | Receiver |
JPH0720964A (en) * | 1993-06-30 | 1995-01-24 | Kokusai Electric Co Ltd | Electric power saving circuit and its control method |
JP3094839U (en) * | 2002-12-24 | 2003-07-04 | ホクレン農業協同組合連合会 | Waterproof compost |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
USRE41833E1 (en) | 1996-11-11 | 2010-10-19 | Dowa Holdings Co., Ltd. | Display device with a transparent optical filter |
USRE43924E1 (en) | 1996-11-11 | 2013-01-15 | Dowa Holdings Co., Ltd. | Display device with a transparent optical filter |
KR100318963B1 (en) * | 1998-11-13 | 2002-03-20 | 윤종용 | How to reduce power consumption of wireless terminal |
KR100594006B1 (en) * | 1999-06-08 | 2006-06-28 | 삼성전자주식회사 | How to reduce power consumption of wireless terminal |
US7890148B2 (en) | 1999-09-29 | 2011-02-15 | Fujitsu Toshiba Mobile Communications Limited | Mobile station used for CDMA mobile communication systems |
KR20040049715A (en) * | 2002-12-07 | 2004-06-12 | 엘지전자 주식회사 | Apparatus and method for controlling power of mobile communication terminal |
JP2007214862A (en) * | 2006-02-09 | 2007-08-23 | Matsushita Electric Ind Co Ltd | Power supply control method in digital broadcasting receiver |
JP4665787B2 (en) * | 2006-02-09 | 2011-04-06 | パナソニック株式会社 | Digital broadcast receiving apparatus, digital broadcast receiving method, program, and recording medium |
JP2007259479A (en) * | 2007-05-09 | 2007-10-04 | Toshiba Corp | Mobile station |
Also Published As
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---|---|
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