KR20100086231A - Apparatus for adjusting feedback voltage for back light of liquid crystal display and driving system for having thereof - Google Patents

Apparatus for adjusting feedback voltage for back light of liquid crystal display and driving system for having thereof Download PDF

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KR20100086231A
KR20100086231A KR1020090005493A KR20090005493A KR20100086231A KR 20100086231 A KR20100086231 A KR 20100086231A KR 1020090005493 A KR1020090005493 A KR 1020090005493A KR 20090005493 A KR20090005493 A KR 20090005493A KR 20100086231 A KR20100086231 A KR 20100086231A
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South Korea
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feedback voltage
voltage
controller
feedback
transistor
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KR1020090005493A
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Korean (ko)
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KR101007033B1 (en
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김경원
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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
    • 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
    • G09G3/3696—Generation of voltages supplied to electrode drivers
    • 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 
    • G02F1/0121—Operation of devices; Circuit arrangements, not otherwise provided for in this subclass
    • G02F1/0123—Circuits for the control or stabilisation of the bias voltage, e.g. automatic bias control [ABC] feedback loops
    • 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
    • G02F1/136—Liquid crystal cells structurally associated with a semi-conducting layer or substrate, e.g. cells forming part of an integrated circuit
    • G02F1/1362—Active matrix addressed cells
    • G02F1/1368—Active matrix addressed cells in which the switching element is a three-electrode device

Abstract

PURPOSE: An apparatus for adjusting a feedback voltage for back light of a liquid crystal display and a driving system for having thereof are provided to suppress the shoot down of a back light unit by controlling a feedback voltage of a driving system. CONSTITUTION: In case a transmitted feedback voltage is bigger than a reference voltage, a feedback voltage controller(410) control a feedback voltage to be lower than the reference voltage. A voltage supply unit(420) applies voltage to the feedback voltage controller to activate the feedback voltage controller. The feedback voltage controller includes bipolar junction transistor or a MOS FET(Metal Oxide Semiconductor Field Effect Transistor).

Description

액정 표시 장치의 백라이트용 피드백 전압 조절 장치 및 그를 포함하는 구동 시스템{APPARATUS FOR ADJUSTING FEEDBACK VOLTAGE FOR BACK LIGHT OF LIQUID CRYSTAL DISPLAY AND DRIVING SYSTEM FOR HAVING THEREOF}Feedback voltage regulating device for backlight of liquid crystal display and driving system including the same {APPARATUS FOR ADJUSTING FEEDBACK VOLTAGE FOR BACK LIGHT OF LIQUID CRYSTAL DISPLAY AND DRIVING SYSTEM FOR HAVING THEREOF}

본 발명은 액정 표시 장치의 백라이트용 피드백 전압 조절 장치 및 그를 포함하는 구동 시스템에 관한 것이다.The present invention relates to a feedback voltage regulating device for a backlight of a liquid crystal display and a driving system including the same.

일반적으로, 액정 표시 장치는 자체 발광을 하지 못하므로, 백라이트라고 불리는 별도의 광원이 필요하며, 이러한 백라이트로는 발광 다이오드(Light Emitting Diode; LED), 냉음극 형광 램프(Cold Cathod Fluorescent Lamp; CCFL), 외부 전극 형광 램프(External Electrode Fluorescent Lamp; EEFL) 등이 사용되고 있고, 냉음극 형광 램프나 외부 전극 형광 램프를 구동하기 위해서는 인버터가 필요하다.In general, since the liquid crystal display does not emit light by itself, a separate light source called a backlight is required, and such a backlight includes a light emitting diode (LED) and a cold cathode fluorescent lamp (CCFL). An external electrode fluorescent lamp (EEFL) is used, and an inverter is required to drive a cold cathode fluorescent lamp or an external electrode fluorescent lamp.

한편, 외부 전극 형광 램프나 냉음극 형광 램프를 구동하는 제어 신호로는 펄스폭 변조(Pulse Width Modulation; PWM) 신호가 이용되고 있으며, 이러한 펄스폭 변조 신호는 외부 전극 형광 램프나 냉음극 형광 램프에 제공되는 전압 신호에서 검출되는 피드백 전압의 크기에 따라서 턴온 시간이 결정된다.Meanwhile, a pulse width modulation (PWM) signal is used as a control signal for driving the external electrode fluorescent lamp or the cold cathode fluorescent lamp, and the pulse width modulation signal is applied to the external electrode fluorescent lamp or the cold cathode fluorescent lamp. The turn on time is determined according to the magnitude of the feedback voltage detected in the provided voltage signal.

그런데, 종래의 펄스폭 변조 신호를 이용하는 액정 표시 장치용 백라이트는 피드백 전압이 일정 레벨 이상일 경우에는 펄스폭 변조 신호의 듀티비(duty ratio)가 너무 커서 셧다운되는 문제점이 있었다.However, the backlight for a liquid crystal display device using the conventional pulse width modulated signal has a problem in that the duty ratio of the pulse width modulated signal is too large when the feedback voltage is higher than a predetermined level.

실시예에 따른 액정 표시 장치의 백라이트용 피드백 전압 조절 장치는 피드백 전압을 조절함으로써, 액정 표시 장치의 백라이트가 셧다운되는 효과적으로 억제할 수 있다.The feedback voltage regulating device for the backlight of the liquid crystal display according to the exemplary embodiment may effectively suppress the backlight of the liquid crystal display from being shut down by adjusting the feedback voltage.

실시예에 따른 액정 표시 장치의 백라이트용 구동 시스템은 피드백 전압을 조절함으로써, 액정 표시 장치의 백라이트가 셧다운되는 효과적으로 억제할 수 있다.The driving system for the backlight of the liquid crystal display according to the embodiment can effectively suppress the backlight of the liquid crystal display from being shut down by adjusting the feedback voltage.

실시예에 따른 액정 표시 장치의 백라이트용 피드백 전압 조절 장치는 전달되는 피드백 전압이 기준 전압보다 큰 경우에 상기 피드백 전압을 상기 기준 전압보다 낮은 전압으로 제어하는 피드백 전압 제어부 및 상기 피드백 전압 제어부가 활성화되도록 상기 피드백 전압 제어부로 전압을 제공하는 전압 제공부를 포함한다.The feedback voltage regulating device for backlight of the liquid crystal display according to the embodiment may enable the feedback voltage controller and the feedback voltage controller to control the feedback voltage to a voltage lower than the reference voltage when the feedback voltage is greater than the reference voltage. It includes a voltage providing unit for providing a voltage to the feedback voltage control unit.

실시예에 따른 액정 표시 장치의 백라이트용 구동 시스템은 펄스 제어 신호를 제공하는 펄스 신호 제어부, 상기 펄스 제어 신호를 전달받아 펄스폭 변조 신호 를 제공하는 스위칭부, 상기 펄스폭 변조 신호를 전달받아 점등 전압을 제공하는 변압기 및 상기 변압기로부터 감지되는 피드백 전압이 기준 전압보다 큰 경우에 상기 피드백 전압을 상기 기준 전압보다 낮은 전압으로 제어하는 피드백 전압 제어부와, 상기 피드백 전압 제어부가 활성화되도록 상기 피드백 전압 제어부로 전압을 제공하는 전압 제공부를 포함한다.In an exemplary embodiment, a backlight driving system of a liquid crystal display includes a pulse signal controller providing a pulse control signal, a switching unit receiving a pulse control signal and providing a pulse width modulation signal, and a lighting voltage received from the pulse width modulation signal. A feedback voltage controller for controlling the feedback voltage to a voltage lower than the reference voltage when a transformer providing a feedback voltage and a feedback voltage detected from the transformer is greater than a reference voltage, and a voltage to the feedback voltage controller to activate the feedback voltage controller. It includes a voltage providing unit for providing.

실시예에 따른 액정 표시 장치의 백라이트용 피드백 전압 조절 장치는 피드백 전압을 조절함으로써, 액정 표시 장치의 백라이트가 셧다운되는 효과적으로 억제할 수 있는 효과가 있다.The feedback voltage regulating device for backlight of the liquid crystal display according to the exemplary embodiment has an effect of effectively suppressing the backlight of the liquid crystal display being shut down by adjusting the feedback voltage.

실시예에 따른 액정 표시 장치의 백라이트용 구동 시스템은 피드백 전압을 조절함으로써, 액정 표시 장치의 백라이트가 셧다운되는 효과적으로 억제할 수 있는 효과가 있다.The driving system for the backlight of the liquid crystal display according to the exemplary embodiment has an effect of effectively suppressing the backlight of the liquid crystal display being shut down by adjusting the feedback voltage.

이하에서는 첨부된 도면을 참조로 하여 본 발명의 바람직한 실시예를 보다 상세히 설명하기로 한다.Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of the present invention.

도 1은 본 발명의 일 실시예에 따른 액정 표시 장치의 백라이트용 구동 시스템의 구성도이고, 도 2는 도 1의 시스템의 피드백 전압 조절부의 회로도이다.1 is a configuration diagram of a driving system for a backlight of a liquid crystal display according to an exemplary embodiment of the present invention, and FIG. 2 is a circuit diagram of a feedback voltage adjusting unit of the system of FIG. 1.

본 발명의 일 실시예에 따른 액정 표시 장치의 백라이트용 구동 시스템은 첨 부 도면 도 1에 도시된 것처럼, 펄스 신호 제어부(100), 스위칭부(200), 변압기(300) 및 피드백 전압 조절부(400)를 포함하여 구성될 수 있다.As shown in FIG. 1, a driving system for a backlight of a liquid crystal display according to an exemplary embodiment of the present invention includes a pulse signal controller 100, a switching unit 200, a transformer 300, and a feedback voltage adjusting unit ( 400).

여기에서, 펄스 신호 제어부(100)는 스위칭부(200)로 펄스 제어 신호를 제공하고, 스위칭부(200)는 펄스 신호 제어부(100)로부터 펄스 제어 신호를 전달받아 펄스폭 변조 신호를 변압기(300)로 제공하며, 변압기(300)는 스위칭부(200)로부터 펄스폭 변조 신호를 전달받아 다수의 외부 전극 형광 램프(500)에 점등 전압을 제공하고, 피드백 전압 조절부(400)는 변압기(300)로부터 감지되는 피드백 전압(FB)이 기준 전압보다 큰 경우에 상기 피드백 전압(FB)을 상기 기준 전압보다 낮은 전압으로 제어하는 피드백 전압 제어부(410)와, 상기 피드백 전압 제어부(410)가 활성화되도록 상기 피드백 전압 제어부(410)로 활성화 전압(ACT)을 제공하는 전압 제공부(420)를 포함하며, 피드백 전압(FB)을 펄스 신호 제어부(100)로 전달한다.Here, the pulse signal control unit 100 provides a pulse control signal to the switching unit 200, the switching unit 200 receives the pulse control signal from the pulse signal control unit 100 to convert the pulse width modulation signal to the transformer 300 The transformer 300 receives the pulse width modulation signal from the switching unit 200 and provides a lighting voltage to the plurality of external electrode fluorescent lamps 500, and the feedback voltage adjusting unit 400 is a transformer 300. When the feedback voltage FB detected from the reference voltage is greater than the reference voltage, the feedback voltage controller 410 for controlling the feedback voltage FB to a voltage lower than the reference voltage and the feedback voltage controller 410 are activated. And a voltage providing unit 420 that provides an activation voltage ACT to the feedback voltage control unit 410, and transmits a feedback voltage FB to the pulse signal control unit 100.

한편, 변압기(300)의 일차 권선 측에 설치되어 있는 도면 부호 250은 변압기(300)로부터 피드백 전압(FB)을 검출하기 위한 것으로서, 저항 등이 이용될 수 있다.Meanwhile, reference numeral 250 installed on the primary winding side of the transformer 300 is for detecting the feedback voltage FB from the transformer 300, and a resistor or the like may be used.

구체적으로, 피드백 전압 제어부(410)는 도 2에 도시된 것처럼, 바이폴라 정션 트랜지스터(BJT; Bioplar Junction Transistor, Q1)를 포함한다. 또한, 피드백 전압 제어부(410)는 모스 트랜지스터(MOS FET; Metal Oxide Semiconductor Field Effect Transistor)를 포함하여 구성하는 것도 가능하다.Specifically, as illustrated in FIG. 2, the feedback voltage controller 410 includes a bipolar junction transistor (BJT). In addition, the feedback voltage controller 410 may be configured to include a metal oxide semiconductor field effect transistor (MOS FET).

여기에서, 전압 제공부(420)는 도 2에 도시된 것처럼, 바이폴라 정션 트랜지스터(BJT; Bioplar Junction Transistor, Q2)를 포함한다. 또한, 전압 제공부(420) 는 모스 트랜지스터(MOS FET; Metal Oxide Semiconductor Field Effect Transistor)를 포함하여 구성하는 것도 가능하다.Here, the voltage provider 420 includes a bipolar junction transistor (BJT) Q2, as shown in FIG. 2. In addition, the voltage providing unit 420 may be configured to include a metal oxide semiconductor field effect transistor (MOS FET).

한편, 저항(R1, R2, R3)은 활성화 전압(ACT)의 크기를 조절하기 위한 것이다.On the other hand, the resistors R1, R2, R3 are for adjusting the magnitude of the activation voltage ACT.

예를 들면, 바이폴라 정션 트랜지스터(Q2)의 컬렉터에 12 V가 인가되고, 저항(R1)이 300 ㏀이며, 저항(R2)이 56 ㏀이고, 저항(R3)이 15 ㏀인 경우에, 활성화 전압(ACT)으로 1.2 V가 제공된다. 바이폴라 정션 트랜지스터(Q1)의 베이스로 활성화 전압(ACT) 1.2 V가 인가되면, 바이폴라 정션 트랜지스터(Q1)의 에미터에 인가되는 피드백 전압(FB)이 1.9 V이상인 경우에는 바이폴라 정션 트랜지스터(Q1)가 턴온된다.For example, when 12 V is applied to the collector of the bipolar junction transistor Q2, the resistor R1 is 300 kV, the resistor R2 is 56 kV, and the resistor R3 is 15 kV, 1.2 V is provided as (ACT). When the activation voltage ACT 1.2 V is applied to the base of the bipolar junction transistor Q1, when the feedback voltage FB applied to the emitter of the bipolar junction transistor Q1 is 1.9 V or more, the bipolar junction transistor Q1 is applied. Is turned on.

따라서, 바이폴라 정션 트랜지스터(Q1)의 에미터에 인가되는 피드백 전압(FB)이 1.9 V이상인 경우에는 바이폴라 정션 트랜지스터(Q1)가 턴온되어, 접지 전압과 연결되므로, 피드백 전압(FB)을 효과적으로 낮출 수 있다.Therefore, when the feedback voltage FB applied to the emitter of the bipolar junction transistor Q1 is 1.9 V or more, the bipolar junction transistor Q1 is turned on and connected to the ground voltage, thereby effectively lowering the feedback voltage FB. have.

이상, 본 발명을 본 발명의 원리를 예시하기 위한 바람직한 실시예와 관련하여 설명하고 도시하였지만, 본 발명은 그와 같이 도시되고 설명된 그대로의 구성 및 작용으로 한정되는 것이 아니다.While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments.

오히려, 첨부된 청구범위의 사상 및 범주를 일탈함이 없이 본 발명에 대한 다수의 변경 및 수정이 가능함을 당업자들은 잘 이해할 수 있을 것이다.Rather, it will be apparent to those skilled in the art that many changes and modifications to the present invention are possible without departing from the spirit and scope of the appended claims.

따라서, 그러한 모든 적절한 변경 및 수정과 균등물들도 본 발명의 범위에 속하는 것으로 간주되어야 할 것이다.Accordingly, all such suitable changes and modifications and equivalents should be considered to be within the scope of the present invention.

도 1은 본 발명의 일 실시예에 따른 액정 표시 장치의 백라이트용 구동 시스템의 구성도.1 is a block diagram of a driving system for a backlight of a liquid crystal display according to an exemplary embodiment of the present invention.

도 2는 도 1의 시스템의 피드백 전압 조절부의 회로도.2 is a circuit diagram of a feedback voltage regulator of the system of FIG.

<도면의 주요부분에 대한 부호 설명><Description of Signs of Major Parts of Drawings>

100: 펄스 신호 제어부 200: 스위칭부100: pulse signal control unit 200: switching unit

300: 변압기 400: 피드백 전압 조절부300: transformer 400: feedback voltage regulator

Claims (6)

전달되는 피드백 전압이 기준 전압보다 큰 경우에 상기 피드백 전압을 상기 기준 전압보다 낮은 전압으로 제어하는 피드백 전압 제어부; 및A feedback voltage controller configured to control the feedback voltage to a voltage lower than the reference voltage when the feedback voltage is greater than the reference voltage; And 상기 피드백 전압 제어부가 활성화되도록 상기 피드백 전압 제어부로 전압을 제공하는 전압 제공부를 포함하는 액정 표시 장치의 백라이트용 피드백 전압 조절 장치.And a voltage supply unit configured to provide a voltage to the feedback voltage controller so that the feedback voltage controller is activated. 제1항에 있어서,The method of claim 1, 상기 피드백 전압 제어부는 바이폴라 정션 트랜지스터(BJT; Bioplar Junction Transistor) 또는 모스 트랜지스터(MOS FET; Metal Oxide Semiconductor Field Effect Transistor) 를 포함하는 액정 표시 장치의 백라이트용 피드백 전압 조절 장치.The feedback voltage control unit includes a bipolar junction transistor (BJT) or a MOS transistor (MOS FET) and a metal oxide semiconductor field effect transistor (MOS FET). 제1항에 있어서,The method of claim 1, 상기 전압 제공부는 바이폴라 정션 트랜지스터(BJT; Bioplar Junction Transistor) 또는 모스 트랜지스터(MOS FET; Metal Oxide Semiconductor Field Effect Transistor) 를 포함하는 액정 표시 장치의 백라이트용 피드백 전압 조절 장치.The voltage providing unit includes a bipolar junction transistor (BJT) or a MOS transistor (MOS FET; Metal Oxide Semiconductor Field Effect Transistor). 펄스 제어 신호를 제공하는 펄스 신호 제어부;A pulse signal controller for providing a pulse control signal; 상기 펄스 제어 신호를 전달받아 펄스폭 변조 신호를 제공하는 스위칭부;A switching unit receiving the pulse control signal and providing a pulse width modulation signal; 상기 펄스폭 변조 신호를 전달받아 점등 전압을 제공하는 변압기; 및A transformer configured to receive the pulse width modulation signal and provide a lighting voltage; And 상기 변압기로부터 감지되는 피드백 전압이 기준 전압보다 큰 경우에 상기 피드백 전압을 상기 기준 전압보다 낮은 전압으로 제어하는 피드백 전압 제어부와, 상기 피드백 전압 제어부가 활성화되도록 상기 피드백 전압 제어부로 전압을 제공하는 전압 제공부를 포함하는 피드백 전압 조절부를 포함하는 액정 표시 장치의 백라이트용 구동 시스템.A feedback voltage controller for controlling the feedback voltage to a voltage lower than the reference voltage when the feedback voltage sensed by the transformer is greater than a reference voltage, and providing a voltage to the feedback voltage controller to activate the feedback voltage controller. A driving system for a backlight of a liquid crystal display including a feedback voltage adjusting unit including a unit. 제4항에 있어서,The method of claim 4, wherein 상기 피드백 전압 제어부는 바이폴라 정션 트랜지스터(BJT; Bioplar Junction Transistor) 또는 모스 트랜지스터(MOS FET; Metal Oxide Semiconductor Field Effect Transistor) 를 포함하는 액정 표시 장치의 백라이트용 구동 시스템.The feedback voltage controller includes a bipolar junction transistor (BJT) or a MOS transistor (MOS FET) and a metal oxide semiconductor field effect transistor (MOS FET). 제4항에 있어서,The method of claim 4, wherein 상기 전압 제공부는 바이폴라 정션 트랜지스터(BJT; Bioplar Junction Transistor) 또는 모스 트랜지스터(MOS FET; Metal Oxide Semiconductor Field Effect Transistor) 를 포함하는 액정 표시 장치의 백라이트용 구동 시스템.The voltage providing unit includes a bipolar junction transistor (BJT) or a MOS transistor (MOS FET) and a metal oxide semiconductor field effect transistor (MOS FET).
KR1020090005493A 2009-01-22 2009-01-22 Apparatus for adjusting feedback voltage for back light of liquid crystal display and driving system for having thereof KR101007033B1 (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8884995B2 (en) 2011-06-17 2014-11-11 Samsung Display Co., Ltd. System for compensating for gamma data, display device including the same and method of compensating for gamma data
KR20170126561A (en) * 2016-05-09 2017-11-20 삼성디스플레이 주식회사 Backlight unit, method of driving the same, and display device having the same

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100382158B1 (en) * 2000-10-20 2003-05-01 주식회사 지엘디 The driving circuit of the plasma discharge type flat backlight
KR100402091B1 (en) * 2001-02-06 2003-10-17 주식회사 지엘디 The backlight driving circuit using Piezoelectric transformer
KR100358925B1 (en) * 2001-02-16 2002-11-01 주식회사 지엘디 The driving circuit of the plasma discharge type flat backlight

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8884995B2 (en) 2011-06-17 2014-11-11 Samsung Display Co., Ltd. System for compensating for gamma data, display device including the same and method of compensating for gamma data
KR20170126561A (en) * 2016-05-09 2017-11-20 삼성디스플레이 주식회사 Backlight unit, method of driving the same, and display device having the same

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