KR20000013243A - Apparatus for automatically adjusting bright of back light of information display apparatus - Google Patents

Apparatus for automatically adjusting bright of back light of information display apparatus Download PDF

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Publication number
KR20000013243A
KR20000013243A KR1019980032003A KR19980032003A KR20000013243A KR 20000013243 A KR20000013243 A KR 20000013243A KR 1019980032003 A KR1019980032003 A KR 1019980032003A KR 19980032003 A KR19980032003 A KR 19980032003A KR 20000013243 A KR20000013243 A KR 20000013243A
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KR
South Korea
Prior art keywords
backlight
brightness
bright
light
unit
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Application number
KR1019980032003A
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Korean (ko)
Inventor
강문석
Original Assignee
윤종용
삼성전자 주식회사
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Priority to KR1019980032003A priority Critical patent/KR20000013243A/en
Publication of KR20000013243A publication Critical patent/KR20000013243A/en

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Classifications

    • 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
    • G09G3/3406—Control of illumination source
    • 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
    • G09G3/3406—Control of illumination source
    • G09G3/342—Control of illumination source using several illumination sources separately controlled corresponding to different display panel areas, e.g. along one dimension such as lines
    • G09G3/3426—Control of illumination source using several illumination sources separately controlled corresponding to different display panel areas, e.g. along one dimension such as lines the different display panel areas being distributed in two dimensions, e.g. matrix
    • 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
    • G09G3/3611—Control of matrices with row and column drivers
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/04—Maintaining the quality of display appearance
    • G09G2320/041—Temperature compensation
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/06—Adjustment of display parameters
    • G09G2320/0626—Adjustment of display parameters for control of overall brightness

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Liquid Crystal Display Device Control (AREA)
  • Liquid Crystal (AREA)

Abstract

PURPOSE: An apparatus for automatically adjusting a bright of a back light of an information display apparatus is to automatically adjust a bright of a back right according a circumference light. CONSTITUTION: An apparatus for automatically adjusting a bright of a back light of an information display apparatus comprises: a back light unit(100) for emitting a light in a rear portion of a liquid crystal panel for brightening a liquid crystal screen; an optical sensor unit(104) for sensing a bright of a circumference light; a bright adjusting unit(102) for adjusting a bright of the back light unit(100) according to a certain control signal; and control unit(106) for controlling the bright adjusting unit(102) according to the sensed bright in the optical sensor unit(104). Thereby, a using time is increased and a back light is provided with an optimum state.

Description

정보표시장치의 백라이트 밝기 자동조정장치Backlight brightness automatic adjustment device of information display device

본 발명은 백라이트 밝기 조정장치에 관한 것으로서, 더욱 상세하게는 정보 표시장치에서, 주위의 빛의 밝기(주변 조도)에 따라, 백라이트의 밝기를 자동으로 조정하는 장치에 관한 것이다.The present invention relates to a backlight brightness adjusting device, and more particularly, to an apparatus for automatically adjusting the brightness of a backlight according to the brightness (ambient illuminance) of ambient light in an information display device.

백라이트는 액정화면표시장치를 채용하는 모든 기기에 적용될 수 있는 바와 같이, 그 적용범위는 넓지만, 본 발명에서는 액정화면표시장치를 채용하는 휴대용 정보단말기를 중심으로 설명하기로 한다.As the backlight can be applied to all devices employing a liquid crystal display, the scope of application of the backlight is broad.

종래의 휴대용정보단말기의 표시장치에서 백라이트 켜짐은 다음과 같은 방법에 의해 수행되도록 되어 있다. 먼저, 자동으로 백라이트가 켜지는 경우로서, 휴대용 정보단말기에 전원이 인가되면 자동으로 백라이트를 켜지든지, 또는 전원이 온되고 일정시간이 지나면 백라이트가 자동으로 켜지도록 동작되는 경우가 있고, 사용자의 조정에 따라 백라이트를 켜는 경우로서, 사용자가 지정해 놓은 시간에만 맞춰 백라이트를 켜도록 동작하는 경우가 있다.In the display device of the conventional portable information terminal, the backlight is turned on by the following method. First, when the backlight is turned on automatically, the backlight may be turned on automatically when power is applied to the portable information terminal, or when the backlight is turned on automatically after a predetermined time after the power is turned on. In some cases, the backlight may be turned on, and the backlight may be turned on only at a time designated by the user.

그러나, 이와 같은 경우, 주위의 빛의 밝기 즉, 주변조도에 상관없이, 일정한 전력을 제공하여 백라이트를 켜기 때문에, 실제로 필요한 백라이트의 밝기를 조정할 수 없는 단점이 있다.However, in such a case, since the backlight is turned on by providing a constant power regardless of the brightness of the surrounding light, that is, the ambient illuminance, there is a disadvantage in that the brightness of the backlight actually required cannot be adjusted.

본 발명은 상술한 문제점을 해결하기 위해 창출된 것으로서, 백라이트를 켜거나 끄는 것을 사용자가 조정할 수 있을 뿐만 아니라, 휴대용 정보단말기가 놓여진 주변 조도를 감지하여, 백라이트의 밝기를 자동으로 조정하는 백라이트 밝기 자동조정장치를 제공하는 것을 그 목적으로 한다.The present invention has been made to solve the above-described problems, the user can not only turn on or off the backlight, but also the brightness of the backlight to automatically adjust the brightness of the backlight by detecting the ambient illumination placed on the portable information terminal It is an object to provide an adjusting device.

도 1은 본 발명에 따른 휴대용 정보단말기의 백라이트 밝기 조정장치의 구성 블록도이다.1 is a block diagram of a backlight brightness adjusting apparatus of a portable information terminal according to the present invention.

도 2는 본 발명에 따른 주변 조도에 따른 백라이트 조정방법을 나타낸 흐름도이다.2 is a flowchart illustrating a backlight adjustment method according to ambient illumination according to the present invention.

상기의 목적을 달성하기 위한 본 발명에 따른, 정보 표시장치의 백라이트 밝기 자동조정장치는 액정화면을 밝게 해 주기 위해 액정판넬뒤에서 빛을 비춰주는 백라이트부; 주변의 빛의 밝기를 감지하는 광센서부; 소정의 제어신호에 따라, 백라이트의 밝기를 조정하는 백라이트 밝기 조정부; 및 상기 광센서부에서 감지된 빛의 밝기에 따라, 상기 백라이트의 밝기 조정부를 제어하는 제어부를 포함하는 것을 특징으로 한다.According to the present invention for achieving the above object, the backlight brightness automatic adjustment device of the information display device for illuminating the light behind the liquid crystal panel to brighten the LCD screen; An optical sensor unit detecting a brightness of ambient light; A backlight brightness controller for adjusting the brightness of the backlight according to a predetermined control signal; And a controller for controlling the brightness adjusting unit of the backlight according to the brightness of the light detected by the optical sensor unit.

이하, 첨부된 도면을 참조하여 본 발명을 보다 상세히 설명한다.Hereinafter, with reference to the accompanying drawings will be described the present invention in more detail.

도 1은 본 발명에 따른 휴대용정보단말기의 백라이트 밝기 조정장치의 구성 블록도이다.1 is a block diagram illustrating a configuration of an apparatus for adjusting backlight brightness of a portable information terminal according to the present invention.

도 1에 도시된 장치는 백라이트부(100), 광센서부(102), 백라이트 밝기 조정부(104), 제어부(106)를 포함한다.The apparatus shown in FIG. 1 includes a backlight unit 100, an optical sensor unit 102, a backlight brightness controller 104, and a controller 106.

백라이트부(100)는 액정화면을 밝게 해 주기 위해 LCD판넬 뒤에 켜지는 일종의 전구나 형광등 같은 것으로서, 주위 환경이 어두울 때에도 표시장치에 나타낸 정보를 볼 수 있도록 한 것이다.The backlight unit 100 is a kind of light bulb or a fluorescent lamp that is turned on behind the LCD panel to brighten the LCD screen, so that the information displayed on the display device can be viewed even when the surrounding environment is dark.

광센서부(104)는 휴대용 정보단말기가 놓여진 주변의 빛의 밝기를 감지한다.The optical sensor unit 104 detects the brightness of the surrounding light on which the portable information terminal is placed.

백라이트 밝기 조정부(104)는 소정의 제어신호에 따라 백라이트의 밝기를 조정한다.The backlight brightness controller 104 adjusts the brightness of the backlight according to a predetermined control signal.

제어부(106)는 광센서부(100)에서 감지된 빛의 밝기에 따라, 백라이트의 밝기 조정부(104)를 제어한다.The controller 106 controls the brightness controller 104 of the backlight according to the brightness of the light detected by the optical sensor unit 100.

이어서, 도 2에 도시된 주변 조도에 따라 백라이트를 조정하는 방법을 나타낸 흐름도를 참조하여, 도 2에 도시된 장치의 동작을 살펴보면 다음과 같다.Subsequently, an operation of the apparatus illustrated in FIG. 2 will be described with reference to a flowchart illustrating a method of adjusting the backlight according to the peripheral illuminance illustrated in FIG. 2.

먼저, 광센서부(104)를 통해 정보통신단말기가 놓여진 주변 환경의 빛의 밝기를 감지한다(20 단계).First, the light sensor unit 104 detects the brightness of the light of the surrounding environment in which the information communication terminal is placed (step 20).

감지된 빛의 밝기를 받아들인 제어부(106)에서는 입력된 빛의 밝기에 따른 백라이트 조정데이터를 반복적인 실험값에 의해 미리 소정의 메모리에 저장한다. 즉, 입력된 빛의 밝기에 대응하는 백라이트의 밝기를 얼마로 할 것인지에 대한 데이터가 메모리에 저장되어 있다. 따라서, 제어부(106)에서는 광센서부(104)에서 감지된 빛의 밝기에 따라, 그에 대응되는 백라이트의 밝기에 대한 데이터를 리드하여, 백라이트 밝기 조정부(102)를 제어한다. 따라서, 백라이트부(100)와 연결된 백라이트 밝기 조정부(102)에 의해 백라이트의 밝기가 조정된다(22 단계).The controller 106 which receives the detected brightness of the light stores the backlight adjustment data according to the brightness of the input light in a predetermined memory in advance by an iterative experimental value. That is, data on how much the brightness of the backlight corresponding to the brightness of the input light is set is stored in the memory. Therefore, the control unit 106 controls the backlight brightness adjusting unit 102 by reading data on the brightness of the backlight corresponding to the brightness of the light detected by the light sensor unit 104. Therefore, the brightness of the backlight is adjusted by the backlight brightness adjusting unit 102 connected to the backlight unit 100 (step 22).

상술한 바와 같이 본 발명에 의하면, 휴대용정보단말기의 사용환경에 백라이트의 밝기를 자동으로 조절할 수 있기 때문에, 밧데리의 전력소모를 감소시켜서 사용 시간을 늘릴 수 있고, 주변환경에 따른 최적상태의 백라이트를 제공하는 효과를 갖는다.As described above, according to the present invention, since the brightness of the backlight can be automatically adjusted to the use environment of the portable information terminal, the use time can be increased by reducing the power consumption of the battery, and the backlight of the optimal state according to the surrounding environment can be increased. Has the effect of providing.

Claims (1)

정보 표시장치에 있어서,In the information display apparatus, 액정화면을 밝게 해 주기 위해 액정판넬뒤에서 빛을 비춰주는 백라이트부;A backlight unit that emits light from behind the liquid crystal panel to brighten the LCD screen; 주변의 빛의 밝기를 감지하는 광센서부;An optical sensor unit detecting a brightness of ambient light; 소정의 제어신호에 따라, 백라이트의 밝기를 조정하는 백라이트 밝기 조정부; 및A backlight brightness controller for adjusting the brightness of the backlight according to a predetermined control signal; And 상기 광센서부에서 감지된 빛의 밝기에 따라, 상기 백라이트의 밝기 조정부를 제어하는 제어부를 포함하는 백라이트 밝기 자동조정장치.And a controller for controlling the brightness controller of the backlight according to the brightness of the light detected by the optical sensor unit.
KR1019980032003A 1998-08-06 1998-08-06 Apparatus for automatically adjusting bright of back light of information display apparatus KR20000013243A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100677958B1 (en) * 2004-10-19 2007-02-02 엘지전자 주식회사 Display apparatus
KR100712334B1 (en) * 2002-09-30 2007-05-02 엘지전자 주식회사 Method for controling a brightness level of LCD
KR100767374B1 (en) * 2001-09-14 2007-10-16 삼성전자주식회사 Liquid crystal display adaptive brightness
KR100867920B1 (en) * 2005-01-24 2008-11-10 삼성에스디아이 주식회사 Liquid Crystal Display Device

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0611690A (en) * 1992-06-26 1994-01-21 Rohm Co Ltd Liquid crystal display device
JPH0667159A (en) * 1992-08-25 1994-03-11 Nec Shizuoka Ltd Liquid crystal display device
JPH10170914A (en) * 1996-12-11 1998-06-26 Oki Electric Ind Co Ltd Liquid crystal display device and display control method therefor

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0611690A (en) * 1992-06-26 1994-01-21 Rohm Co Ltd Liquid crystal display device
JPH0667159A (en) * 1992-08-25 1994-03-11 Nec Shizuoka Ltd Liquid crystal display device
JPH10170914A (en) * 1996-12-11 1998-06-26 Oki Electric Ind Co Ltd Liquid crystal display device and display control method therefor

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100767374B1 (en) * 2001-09-14 2007-10-16 삼성전자주식회사 Liquid crystal display adaptive brightness
KR100712334B1 (en) * 2002-09-30 2007-05-02 엘지전자 주식회사 Method for controling a brightness level of LCD
KR100677958B1 (en) * 2004-10-19 2007-02-02 엘지전자 주식회사 Display apparatus
KR100867920B1 (en) * 2005-01-24 2008-11-10 삼성에스디아이 주식회사 Liquid Crystal Display Device

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