KR20000007432A - Power-saving style back light driving device of mobile wireless terminal - Google Patents

Power-saving style back light driving device of mobile wireless terminal Download PDF

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Publication number
KR20000007432A
KR20000007432A KR1019980026774A KR19980026774A KR20000007432A KR 20000007432 A KR20000007432 A KR 20000007432A KR 1019980026774 A KR1019980026774 A KR 1019980026774A KR 19980026774 A KR19980026774 A KR 19980026774A KR 20000007432 A KR20000007432 A KR 20000007432A
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KR
South Korea
Prior art keywords
voltage
power
backlight
unit
back light
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Application number
KR1019980026774A
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Korean (ko)
Inventor
이정남
Original Assignee
윤종용
삼성전자 주식회사
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Priority to KR1019980026774A priority Critical patent/KR20000007432A/en
Publication of KR20000007432A publication Critical patent/KR20000007432A/en

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02—Power saving arrangements
    • H04W52/0209—Power saving arrangements in terminal devices
    • H04W52/0261—Power saving arrangements in terminal devices managing power supply demand, e.g. depending on battery level
    • H04W52/0267—Power saving arrangements in terminal devices managing power supply demand, e.g. depending on battery level by controlling user interface components
    • H04W52/027—Power saving arrangements in terminal devices managing power supply demand, e.g. depending on battery level by controlling user interface components by controlling a display operation or backlight unit
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • G02F1/133612—Electrical details
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
    • G09G2330/02—Details of power systems and of start or stop of display operation
    • G09G2330/021—Power management, e.g. power saving
    • 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

PURPOSE: A power-saving style back light driving device is provided to extend the usage period of a terminal by automatically turning the back light off to reduce the current waste when the voltage of a battery is under a certain standard. CONSTITUTION: The mobile wireless terminal back light driving device comprises: a user interface unit(70) for setting up a mode to control the on/off of the back light and inputting all kinds of data; a voltage check unit(30) for checking the voltage of the battery; a memory(20) for storing a certain standard voltage figure; a central processing device(10) for generating a power blocking signal(S1) if the checked voltage figure is lower than the standard voltage one; a power blocking unit(50) for blocking the power supplied to keep the back light on by responding to the power blocking signal.

Description

이동 무선 단말기의 절전형 백라이트 구동 장치Power-saving backlight driving device of mobile wireless terminal

본 발명은 이동 무선 단말기에 있어서 백라이트(back light)를 구동하는 장치에 관한 것으로, 특히 절전형 백라이트 구동 장치에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for driving a back light in a mobile wireless terminal, and more particularly to a power saving backlight driving device.

통상적으로 휴대용 전화기에서는 사용자의 키 입력 편의나 액정표시장치(Liquid Crystal Display: 이하 LCD라 함.)를 보는데 용이하도록 백라이트를 갖추고 있다. 예를 들어 플립(flip)형 전화기의 경우에는 사용자가 플립을 열게 되면 키패드 및 LCD의 백라이트가 온(on)된다.In general, portable telephones are equipped with backlights to facilitate a user's key input or to view a liquid crystal display (LCD). For example, in the case of a flip phone, when the user opens the flip, the backlight of the keypad and the LCD is turned on.

그런데 휴대용 전화기와 같은 이동 무선 단말기는 주로 한정된 용량의 배터리를 전원으로 사용하며, 백라이트도 그 전원을 소모하는 한 요소임을 고려해볼 때 백라이트의 온 혹은 오프에도 소정의 제한이 필요하다. 예를 들어 배터리 잔량이 얼마 되지 않는데도 백라이트가 계속 켜진다면 그만큼 전류 소모가 더 되므로, 만약 배터리 충전이 곤란한 상황에 있는 경우라면 이러한 전류 소모라도 줄여야 할 것이다. 불필요하게 전원을 낭비해버리면 단말기 사용시간[전화기의 경우 통화시간 및 수신대기시간]의 단축을 가져오게 되고, 이렇게 되면 사용자는 매우 불편해질 뿐만 아니라 그만큼 경제적인 손실도 따른다.However, a mobile wireless terminal such as a portable telephone mainly uses a limited-capacity battery as a power source, and considering that the backlight is also an element that consumes the power, a predetermined restriction is required even when the backlight is turned on or off. For example, if the backlight keeps on even though the battery is low, it will consume more current. If the battery is in a difficult situation, it will be necessary to reduce the current consumption. Unnecessarily wasting power leads to a shortening of the terminal usage time (talk time and reception waiting time in the case of a phone), which not only makes the user very uncomfortable, but also economically expensive.

따라서 본 발명의 목적은 이동 무선 단말기의 절전형 백라이트 구동 장치를 제공함에 있다.Accordingly, an object of the present invention is to provide a power saving backlight driving apparatus of a mobile wireless terminal.

본 발명의 다른 목적은 이동 무선 단말기의 절전형 백라이트 구동 장치는, 백라이트 온/오프를 제어하기 위한 모드의 설정 및 각종 데이터를 입력하기 위한 사용자 인터페이스부와, 배터리의 전압을 체크하는 전압체크부와, 소정의 기준전압값을 저장하는 메모리와, 상기 전압체크부에서 체크한 전압을 상기 메모리로부터 읽은 기준전압값과 비교하여 상기 기준전압값 보다 낮으면 전원차단신호를 발생하는 중앙처리장치와, 상기 전원차단신호에 응답하여 백라이트 온 상태를 유지하기 위해 공급되는 전원을 차단하는 전원차단부로 구성됨을 특징으로 한다.Another object of the present invention is to provide a power saving backlight driving apparatus for a mobile wireless terminal, including: a user interface unit for setting a mode for controlling backlight on / off and inputting various data, a voltage check unit for checking a voltage of a battery; A memory for storing a predetermined reference voltage value, a central processing unit for generating a power-off signal when the voltage checked by the voltage checker is lower than the reference voltage value compared to the reference voltage value read from the memory; And a power cut-off unit which cuts off the power supplied to maintain the backlight on in response to the blocking signal.

도 1은 본 발명의 실시 예에 따른 이동 무선 단말기 백라이트 구동 장치의 블록 구성도1 is a block diagram of a mobile wireless terminal backlight driving apparatus according to an embodiment of the present invention

이하 본 발명의 바람직한 실시 예를 첨부한 도면을 참조하여 상세히 설명한다. 하기 설명에서는 구체적인 회로의 구성 소자 등과 같은 많은 특정(特定) 사항들이 나타나고 있는데, 이는 본 발명의 보다 전반적인 이해를 돕기 위해서 제공된 것일 뿐 이러한 특정 사항들 없이도 본 발명이 실시될 수 있음은 이 기술 분야에서 통상의 지식을 가진 자에게는 자명하다 할 것이다. 그리고 본 발명을 설명함에 있어, 관련된 공지 기능 혹은 구성에 대한 구체적인 설명이 본 발명의 요지를 불필요하게 흐릴 수 있다고 판단되는 경우 그 상세한 설명을 생략한다.Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description, numerous specific details such as components of specific circuits are shown, which are provided to help a more general understanding of the present invention, and it is understood that the present invention may be practiced without these specific details. It will be self-evident to those of ordinary knowledge. In the following description of the present invention, if it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted.

도 1은 본 발명의 실시 예에 따른 이동 무선 단말기 백라이트 구동 장치의 블록 구성도 이다.1 is a block diagram of a mobile wireless terminal backlight driving apparatus according to an embodiment of the present invention.

백라이트 온/오프를 제어하기 위한 모드의 설정 및 각종 데이터를 입력하기 위한 사용자 인터페이스부(70)와, 배터리의 전압을 체크하는 전압체크부(30)와, 소정의 기준전압값을 저장하는 메모리(20)와, 상기 전압체크부(30)에서 체크한 전압을 상기 메모리(20)로부터 읽은 기준전압값과 비교하여 상기 기준전압값 보다 낮으면 전원차단신호(S1)를 발생하는 중앙처리장치(10)와, 상기 전원차단신호(S1)에 응답하여 백라이트 온 상태를 유지하기 위해 공급되는 전원을 차단하는 전원차단부(50)로 구성된다.A user interface unit 70 for setting a mode for controlling backlight on / off and inputting various data, a voltage check unit 30 for checking a voltage of a battery, and a memory for storing a predetermined reference voltage value ( 20 and the central processing unit 10 generating a power cutoff signal S1 when the voltage checked by the voltage checker 30 is lower than the reference voltage value compared with the reference voltage value read from the memory 20. And a power cutoff unit 50 for cutting off the power supplied to maintain the backlight on state in response to the power cutoff signal S1.

백라이트부(60)는 주로 발광다이오드(Light Emitting Diode: 이하 LED라 함.)로 구현한다. 상기 사용자 인터페이스부(70)는 키패드 및 액정표시장치를 포함한다.The backlight unit 60 is mainly implemented as a light emitting diode (hereinafter, referred to as an LED). The user interface unit 70 includes a keypad and a liquid crystal display device.

상기 중앙처리장치(10)는 일정 주기마다 상기 전압체크부(30)로 체크 명령을 발생하고, 상기 전압체크부(30)는 상기 체크 명령에 응답하여 배터리 전압을 체크한다. 또한 백라이트 오프 상태에 있다가도 사용자가 배터리를 충전하면 다시 온 상태로 되도록 한다.The CPU 10 generates a check command to the voltage check unit 30 at regular intervals, and the voltage check unit 30 checks the battery voltage in response to the check command. It also keeps the backlight on when the user charges the battery even when the backlight is off.

한편 본 발명의 상세한 설명에서는 구체적인 실시 예에 관해 설명하였으나, 본 발명의 범위에서 벗어나지 않는 한도 내에서 여러 가지 변형이 가능함은 물론이다. 그러므로 본 발명의 범위는 설명된 실시 예에 국한되어 정해져서는 안되며 후술하는 특허청구의 범위뿐 만 아니라 이 특허청구의 범위와 균등한 것들에 의해 정해져야 한다.Meanwhile, in the detailed description of the present invention, specific embodiments have been described, but various modifications are possible without departing from the scope of the present invention. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be defined not only by the scope of the following claims, but also by the equivalents of the claims.

상술한 바와 같은 본 발명은 배터리 전압이 일정 기준 이하일 때에는 백라이트를 자동으로 오프시켜 그만큼의 전류 소모를 줄여줌으로써 단말기 사용시간을 연장시키는 장점이 있다.As described above, the present invention has an advantage of extending the use time of the terminal by automatically turning off the backlight when the battery voltage is lower than a predetermined reference to reduce the current consumption.

Claims (4)

이동 무선 단말기의 절전형 백라이트 구동 장치에 있어서,In the power saving backlight driving apparatus of a mobile wireless terminal, 백라이트가 제공되는 사용자 인터페이스부와,A user interface unit provided with a backlight; 배터리의 전압을 체크하는 전압체크부와,A voltage check unit that checks the voltage of the battery, 소정의 기준전압값을 저장하는 메모리와,A memory for storing a predetermined reference voltage value; 상기 전압체크부에서 체크한 전압을 상기 메모리로부터 읽은 기준전압값과 비교하여 상기 기준전압값 보다 낮으면 전원차단신호를 발생하는 중앙처리장치와,A central processing unit which generates a power-off signal when the voltage checked by the voltage checking unit is lower than the reference voltage value compared with the reference voltage value read from the memory; 상기 전원차단신호에 응답하여 백라이트 온 상태를 유지하기 위해 공급되는 전원을 차단하는 전원차단부로 구성됨을 특징으로 하는 장치.And a power cut-off unit which cuts off power supplied to maintain a backlight on state in response to the power cut-off signal. 제1항에 있어서,The method of claim 1, 상기 중앙처리장치는 일정 주기마다 상기 전압체크부로 체크 명령을 발생하고, 상기 전압체크부는 상기 체크 명령에 응답하여 배터리 전압을 체크함을 특징으로 하는 장치.Wherein the CPU generates a check command to the voltage check unit at predetermined intervals, and the voltage check unit checks a battery voltage in response to the check command. 제1항 혹은 제2항중 어느 하나의 항에 있어서,The method according to claim 1 or 2, 상기 백라이트는 발광다이오드에 의해 발생됨을 특징으로 하는 장치.Wherein said backlight is generated by a light emitting diode. 제3항에 있어서,The method of claim 3, 상기 사용자 인터페이스부는 백라이트 온/오프를 제어하기 위한 모드의 설정 및 각종 데이터를 입력하기 위한 키패드와 액정표시장치로 구성됨을 특징으로 하는 장치.And the user interface unit includes a keypad for setting a mode for controlling backlight on / off and a keypad for inputting various data and a liquid crystal display device.
KR1019980026774A 1998-07-03 1998-07-03 Power-saving style back light driving device of mobile wireless terminal KR20000007432A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100417407B1 (en) * 2001-05-25 2004-02-05 엘지전자 주식회사 Power saving method of mobile communication terminal
KR100455165B1 (en) * 2002-10-11 2004-11-06 엘지전자 주식회사 Lighting device control method for mobile terminal
KR100703659B1 (en) * 2005-12-20 2007-04-06 엘지전자 주식회사 Apparatus for controlling of battery saving in portable audio player and method thereof
KR100826164B1 (en) * 2002-07-13 2008-04-30 엘지전자 주식회사 Mobile communication terminal having power saving function

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100417407B1 (en) * 2001-05-25 2004-02-05 엘지전자 주식회사 Power saving method of mobile communication terminal
KR100826164B1 (en) * 2002-07-13 2008-04-30 엘지전자 주식회사 Mobile communication terminal having power saving function
KR100455165B1 (en) * 2002-10-11 2004-11-06 엘지전자 주식회사 Lighting device control method for mobile terminal
KR100703659B1 (en) * 2005-12-20 2007-04-06 엘지전자 주식회사 Apparatus for controlling of battery saving in portable audio player and method thereof

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