KR100697202B1 - Notebook computer backlight brightness control device - Google Patents

Notebook computer backlight brightness control device Download PDF

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Publication number
KR100697202B1
KR100697202B1 KR1020050110296A KR20050110296A KR100697202B1 KR 100697202 B1 KR100697202 B1 KR 100697202B1 KR 1020050110296 A KR1020050110296 A KR 1020050110296A KR 20050110296 A KR20050110296 A KR 20050110296A KR 100697202 B1 KR100697202 B1 KR 100697202B1
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South Korea
Prior art keywords
brightness
sensor
backlight
inverter
pcb
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KR1020050110296A
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Korean (ko)
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한재현
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엘지이노텍 주식회사
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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
    • G09G5/10—Intensity circuits
    • 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
    • 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

Abstract

A device for controlling backlight brightness of a notebook computer is provided to reduce expense with reduction of the number of parts by removing a wire transferring a surrounding brightness signal measured in a sensor to an inverter, as the brightness is controller by reversely inserting the sensor into a hole formed at a PCB(Printed Circuit Board). A backlight brightness controller of the notebook computer is connected to an LCD(Liquid Crystal Display) panel and an inverter PCB(62a), and controls the brightness of the LCD panel through the inverter PCB. The backlight brightness controller is equipped with the sensor(80) for measuring the surrounding brightness outside a system cover(100). The brightness of a backlight is controlled according to a surrounding brightness signal measured and received from the sensor. The hole having the same size as the sensor is formed at the inverter PCB, the sensor is attached to the hole, and the brightness of the backlight is controlled by the surrounding brightness signal measured through the sensor.

Description

노트북용 백라이트 휘도 제어장치{notebook computer backlight brightness control device}Notebook computer backlight brightness control device

도 1 은 본 발명에 따른 액정표시장치의 구성이 도시된 사시도,1 is a perspective view showing the configuration of a liquid crystal display according to the present invention;

도 2 는 본 발명에 따른 노트북용 백라이트 휘도 제어장치의 실시예가 도시된 예시도이다.2 is an exemplary view showing an embodiment of a backlight brightness control apparatus for a notebook according to the present invention.

<도면의 주요 부분에 관한 부호의 설명><Explanation of symbols on main parts of the drawings>

10 : LCD 패널 20 : 게이트 구동회로10 LCD panel 20 gate driving circuit

30 : 소오스 구동회로 40 : 타이밍 컨트롤러30 source driving circuit 40 timing controller

60 : 백라이트 62 : 인버터 60: backlight 62: inverter

62a : 인버터 PCB 64 : 냉음극형광램프62a: Inverter PCB 64: Cold Cathode Fluorescent Lamp

66 : 반사판 80 : 센서 66: reflector 80: sensor

100 : 시스템 커버100: system cover

본 발명은 노트북용 백라이트 휘도 제어장치에 관한 것이다.The present invention relates to a backlight brightness control apparatus for notebooks.

일반적으로, 핸드폰, PDA, 노트북와 같은 각종 휴대용 전자기기가 발전함에 이에 적용할 수 있는 평판표시장치(Flat Panel Display Device)에 대한 요구가 점차 증대되고 있다. 이러한 평판표시장치로는 LCD(Liquid Crystal Display), PDP(Plasma Display Panel), FED(Field Emission Display) 등이 활발히 연구되고 있지만, 양산화 기술, 구동수단의 용이성, 고화질의 구현이라는 이유로 인해 현재에는 액정표시장치(LCD)가 각광받고 있다.In general, as the development of various portable electronic devices such as mobile phones, PDAs, notebooks, the need for a flat panel display device (flat panel display device) that can be applied thereto is gradually increasing. Liquid crystal display (LCD), plasma display panel (PDP), field emission display (FED), etc. are being actively researched as such flat panel display devices. Display devices (LCDs) are in the spotlight.

또한, 디스플레이장치로(LCD)가 탑재되며 AC 입력전원보다는 배터리 전원을 주로 사용하는 노트북 컴퓨터와 같은 휴대용 전자기기는 상기 LCD 상에 디스플레이되는 내용이 보다 정확하고 선명하게 보이도록 하기 위해 발광원인 백라이트가 설치되는데, 이때 상기 백라이트는 주로 CCFL(Cold Cathode Fluore Lamp : 냉음극형광램프)이 사용된다.In addition, portable electronic devices, such as notebook computers, which are equipped with a display device (LCD) and mainly use battery power rather than an AC input power source, have a backlight, which is a light emitting source, to make the content displayed on the LCD more accurate and clear. In this case, the backlight is mainly used a Cold Cathode Fluore Lamp (CCFL).

이때, 노트북 컴퓨터와 같은 대부분의 휴대용 기기에서는 냉음극형광램프를 구동시키는 전원장치로서 인버터(Inverter)와, 주변의 밝기를 측정하는 센서가 구비되어, 상기 센서를 통해 감지된 주변 밝기에 따라 백라이트에 구동전류가 인가되어 밝기가 조절된다.At this time, in most portable devices such as notebook computers, an inverter and a sensor for measuring the brightness of the surroundings are provided as a power source for driving the cold cathode fluorescent lamp. The driving current is applied to adjust the brightness.

그러나, 종래에는 주변 밝기 신호를 센싱 할 수 있는 센서가 시스템(노트북, LCD 모니터, TV 등) 겉 케이스 부분에 부착되어, 상기 센서를 통해 감지된 주변 밝 기가 인쇄회로기판(PCB)에 연결된 인버터(Inverter)로 전달되기 위해 긴 와이어를 사용하여 백라이트의 휘도 제어한다.However, in the related art, a sensor capable of sensing an ambient brightness signal is attached to a case portion of a system (laptop, LCD monitor, TV, etc.) so that the ambient brightness detected by the sensor is connected to a printed circuit board (PCB). The brightness of the backlight is controlled by using long wires to be delivered to the inverter.

이때, 상기 구비된 와이어가 길면 길수록 다른 신호와의 교섭(외란)에 의해 신호 전달이 제대로 안됨으로서, 백라이트의 휘도 제어장치의 오동작이 발생할 수 있어, 액정표시장치(LCD) 휘도의 효율성이 저하되는 문제점이 있다.At this time, the longer the wire is provided, the poorer the signal transmission due to negotiation (disturbance) with other signals, which may cause malfunction of the brightness control device of the backlight, thereby reducing the efficiency of the LCD brightness. There is a problem.

본 발명은 상기한 종래 기술의 문제점을 해결하기 위하여 안출된 것으로서, 그 목적은 센서를 통해 감지된 신호의 전송 오류로 인한 오동작을 방지하는 노트북용 백라이트 휘도 제어장치를 제공하는데 있다.The present invention has been made to solve the above problems of the prior art, an object of the present invention is to provide a backlight brightness control device for a notebook to prevent malfunction due to transmission error of the signal detected through the sensor.

상기한 과제를 해결하기 위한 본 발명에 따른 노트북용 백라이트 휘도 제어장치는 백라이트 휘도 제어를 위하여 주변 밝기를 측정하는 센서가 구비되는 노트북용 백라이트 휘도 제어장치에 있어서, 액정 표시장치의 시스템 커버 및 인버터 PCB에 홀이 형성되고, 상기 형성된 홀에 상기 액정 표시장치 패널 외부의 밝기를 측정하는 센서가 삽입되는 것을 특징으로 한다.In accordance with an aspect of the present invention, there is provided a backlight backlight control apparatus for a notebook computer including a sensor for measuring ambient brightness for backlight brightness control, the system cover of an LCD and an inverter PCB. A hole is formed in the hole, and the sensor for measuring the brightness of the outside of the liquid crystal display panel is inserted into the formed hole.

이하, 본 발명의 바람직한 실시예를 첨부된 도면을 참조하여 상세히 설명한다. 도 1 은 본 발명에 따른 액정표시장치의 구성이 도시된 사시도이다. Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. 1 is a perspective view showing the configuration of a liquid crystal display according to the present invention.

본 발명에 따른 액정표시장치는 도 1에 도시된 바와 같이, 두 개의 글래스 사이에 액정이 주입된 LCD 패널(10)과, 상기 LCD 패널(10)을 구동시키기 위한 게이트 구동회로(20) 및 소오스 구동회로(30)와, 상기 구동회로(20) 및 소오스 구동회로(30)를 제어하는 제어 신호들을 발생하는 타이밍 컨트롤러(40)와, 상기 LCD 패널(10) 일측면 또는 양측면에 광원을 두어 반사판(66)에 광선을 받아 확산하는 백라이트(60)를 포함하여 구성된다.As shown in FIG. 1, the liquid crystal display according to the present invention includes an LCD panel 10 in which liquid crystal is injected between two glasses, a gate driving circuit 20 and a source for driving the LCD panel 10. A reflector by placing a light source on one side or both sides of the driving circuit 30, the timing controller 40 generating control signals for controlling the driving circuit 20 and the source driving circuit 30, and the LCD panel 10. And a backlight 60 which receives and diffuses light rays at 66.

또한, 상기 액정표시장치는 상기 백라이트(60)에 구동 전류를 인가하여 휘도를 제어하는 인버터(62)를 더 포함하여 구성된다.In addition, the liquid crystal display further includes an inverter 62 for controlling the brightness by applying a driving current to the backlight 60.

상기 백라이트(60)는 인버터(62), 냉음극 형광램프(64), 반사판(66) 등으로 구성되어, 광원으로 사용되는 냉음극 형광램프(64)로부터 밝기가 균일한 평면광 형성된다.The backlight 60 is composed of an inverter 62, a cold cathode fluorescent lamp 64, a reflecting plate 66, and the like, and is formed of flat light having uniform brightness from the cold cathode fluorescent lamp 64 used as a light source.

상기 인버터(62)는 외부단자로부터 AC 전원이 공급되면, 이를 정류한 후 필요한 주파수의 교류로 변화시켜 냉음극 형광램프(64)에 공급함으로써 등화시키게 된다. When AC power is supplied from an external terminal, the inverter 62 is rectified and then converted to an alternating current of a required frequency to be equalized by supplying it to the cold cathode fluorescent lamp 64.

이 경우, 인버터에서 냉음극 형광램프(64)로 공급되는 전류의 크기를 조정함으로써 냉음극 형광램프(64)의 밝기를 조정할 수 있게 되고, 결과적으로 액정 표시 장치의 휘도를 조절한다.In this case, the brightness of the cold cathode fluorescent lamp 64 can be adjusted by adjusting the amount of current supplied from the inverter to the cold cathode fluorescent lamp 64, and as a result, the brightness of the liquid crystal display device is adjusted.

도 2 는 본 발명에 따른 노트북용 백라이트 휘도 제어장치의 실시예가 도시된 예시도이다. 2 is an exemplary view showing an embodiment of a backlight brightness control apparatus for a notebook according to the present invention.

도 2 에 도시된 바와 같이, 노트북용 백라이트 휘도 제어장치는 상기 LCD 패널(10)와, 인버터 PCB(62a)가 연결되고, 상기 연결된 인버터 PCB(62a)를 통해 상기 LCD 패널(10)의 백라이트(60)의 휘도를 제어한다.As shown in FIG. 2, a backlight brightness controller for a notebook includes a backlight backlight of the LCD panel 10 connected to the LCD panel 10 and an inverter PCB 62a and connected to the inverter PCB 62a. 60).

또한, 상기 노트북용 백라이트 휘도 제어장치는 시스템 커버(100) 외부의 주변 밝기를 측정하는 센서(80)가 구비되는데, 상기 센서(80)에서 측정된 주변 밝기 신호가 상기 인버터 PCB(62a)로 전송되어, 상기 전송된 신호에 따라 백라이트(60)의 휘도를 조절한다.In addition, the backlight brightness control device for a notebook is provided with a sensor 80 for measuring the ambient brightness outside the system cover 100, the ambient brightness signal measured by the sensor 80 is transmitted to the inverter PCB (62a). The brightness of the backlight 60 is adjusted according to the transmitted signal.

상기 인버터 PCB(62a)는 사용할 센서부분만큼 각 홀(71)이 형성되어, 상기 형성된 홀(71)에 상기 센서(80)가 부착되는데, 상기 센서(80)를 통해 측정된 주변 밝기 신호에 따라 상기 백라이트(60)의 휘도를 제어한다.In the inverter PCB 62a, each hole 71 is formed as much as a sensor part to be used, and the sensor 80 is attached to the formed hole 71 according to an ambient brightness signal measured through the sensor 80. The brightness of the backlight 60 is controlled.

여기서, 상기 인버터 PCB(62a)에 형성된 홀(71)부분과 동일하게 상기 시스템 커버(100)에 홀(미도시)이 형성되며, 상기 형성된 홀에 상기 센서에서 측정되는 주변의 빛을 투과시키는 물체(투명 유리 또는 플라스틱)(미도시)가 형성된다.Here, a hole (not shown) is formed in the system cover 100 in the same manner as the hole 71 formed in the inverter PCB 62a, and an object that transmits the ambient light measured by the sensor to the formed hole. (Transparent glass or plastic) (not shown) is formed.

이때, 상기 인버터 PCB(62a)와, 상기 시스템 커버(100)가 인접해 있으며, 상기 각각 형성된 홀이 일정하게 배치되어 상기 센서(80)을 통해 측정된 주변 밝기 신호에 따라 상기 백라이트(60)의 휘도를 제어한다.In this case, the inverter PCB 62a and the system cover 100 are adjacent to each other, and the formed holes are constantly arranged so that the backlight 60 of the backlight 60 is measured according to the ambient brightness signal measured by the sensor 80. Control the brightness.

즉, 상기 인버터 PCB(62a)는 상기 센서(80)에서 측정된 주변 밝기 신호가 다른 신호와 교섭(외란) 되지 않도록 상기 인버터 PCB(62a)에 각 홀(71)이 형성되어, 상기 센서에서 측정된 주변 밝기 신호를 입력받는다.That is, in the inverter PCB 62a, holes 71 are formed in the inverter PCB 62a so that the ambient brightness signal measured by the sensor 80 does not negotiate (disturb) with other signals. Received ambient brightness signal.

따라서, 상기와 같이 구성된 본 발명은 상기 센서(80)가 상기 인버터 PCB(62a)에 형성된 홀(71)에 역삽입됨으로서, 시스템 커버(100) 외부의 주변 밝기를 측정하는 센서(80)의 신호 데이터가 다른 신호의 영향을 받지 않고 상기 인버터 PCB(62a)로 직접 전달되어 상기 백라이트(60)의 냉음극 형광램프(64)의 휘도를 조절하게된다.Therefore, in the present invention configured as described above, the sensor 80 is inserted back into the hole 71 formed in the inverter PCB 62a, so that the signal of the sensor 80 measuring the ambient brightness of the outside of the system cover 100 is measured. Data is transferred directly to the inverter PCB 62a without being influenced by other signals to adjust the brightness of the cold cathode fluorescent lamp 64 of the backlight 60.

이상과 같이 본 발명에 따른 노트북용 백라이트 휘도 제어장치을 예시된 도면을 참조로 설명하였으나, 본 명세서에 개시된 실시예와 도면에 의해 본 발명은 한정되지 않고, 본 발명의 기술사상이 보호되는 범위 이내에서 당업자에 의해 응용이 가능하다.As described above, the backlight brightness control apparatus for a notebook computer according to the present invention has been described with reference to the illustrated drawings. However, the present invention is not limited by the embodiments and drawings disclosed herein, but the scope of the technical idea of the present invention is protected. Application is possible by those skilled in the art.

상기와 같이 구성되는 본 발명에 따른 노트북용 백라이트 휘도 제어 장치는 주변 밝기를 측정하는 센서가 사용할 센서부분만큼의 각 홀이 형성된 인쇄회로기판(PCB)에 역삽입되어 백라이트의 휘도를 제어함으로서, 센서에서 측정되는 주변 밝기 신호를 인버터로 전송하는 와이어가 제거되어, 부품수가 감소함에 따라 비용이 절감되고, 전송되는 신호와 다른 신호가 교섭(외란) 되는 것을 방지하여, 백라이트의 휘도를 제어함으로서, LCD 패널의 효율성이 증가되는 효과가 있다.The backlight brightness control apparatus for a notebook according to the present invention configured as described above is inserted back into a printed circuit board (PCB) in which each hole is formed as much as the sensor portion to be used by the sensor for measuring the ambient brightness to control the brightness of the backlight, the sensor By eliminating the wire that transmits the ambient brightness signal measured by the inverter to the inverter, the cost is reduced as the number of parts is reduced, and the signal is not negotiated with the transmitted signal, thereby controlling the brightness of the backlight. The efficiency of the panel is increased.

Claims (1)

백라이트 휘도 제어를 위하여 주변 밝기를 측정하는 센서가 구비되는 노트북용 백라이트 휘도 제어장치에 있어서,In the backlight brightness control device for a notebook is provided with a sensor for measuring the ambient brightness to control the backlight brightness, 액정 표시장치의 시스템 커버 및 인버터 PCB에 홀이 형성되고, 상기 형성된 홀에 상기 액정 표시장치 패널 외부의 밝기를 측정하는 센서가 삽입되는 것을 특징으로 하는 노트북용 백라이트 휘도 제어 장치.And a hole is formed in the system cover of the liquid crystal display and the inverter PCB, and a sensor for measuring the brightness of the outside of the liquid crystal display panel is inserted into the formed hole.
KR1020050110296A 2005-11-17 2005-11-17 Notebook computer backlight brightness control device KR100697202B1 (en)

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