KR20120006196A - Liquid crystal display device - Google Patents

Liquid crystal display device Download PDF

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KR20120006196A
KR20120006196A KR1020100066803A KR20100066803A KR20120006196A KR 20120006196 A KR20120006196 A KR 20120006196A KR 1020100066803 A KR1020100066803 A KR 1020100066803A KR 20100066803 A KR20100066803 A KR 20100066803A KR 20120006196 A KR20120006196 A KR 20120006196A
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pigment
red
liquid crystal
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KR101684611B1 (en
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이상욱
김영주
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엘지디스플레이 주식회사
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    • 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
    • G02F1/133509—Filters, e.g. light shielding masks
    • G02F1/133514—Colour filters
    • 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
    • G02F1/133524—Light-guides, e.g. fibre-optic bundles, louvered or jalousie light-guides
    • 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
    • G02F1/133553—Reflecting elements
    • 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
    • G02F1/133603—Direct backlight with LEDs
    • 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
    • G02F1/133605—Direct backlight including specially adapted reflectors
    • 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
    • G02F1/133615—Edge-illuminating devices, i.e. illuminating from the side
    • 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
    • G02F1/136209—Light shielding layers, e.g. black matrix, incorporated in the active matrix substrate, e.g. structurally associated with the switching element

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  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Liquid Crystal (AREA)
  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)

Abstract

PURPOSE: A liquid crystal display apparatus is provided to improve the brightness of the liquid crystal display apparatus by adding a yellow fluorescent substance in an LED. CONSTITUTION: A liquid crystal display apparatus includes an array board(112), a color filter board(114), and a reflection board. The array board includes a thin film transistor(T). The color filter board includes the red, green, and blue color filter pattern. The reflection board is located at the bottom of the liquid crystal display panel. The backlight unit is composed of plural light sheets located at the upper side of the light emitting diode. The color pattern of red is formed using a mixture which is composed of the red 242 pigment and the red 177 pigment.

Description

액정표시장치{Liquid crystal display device} [0001] Liquid crystal display device [0002]

본 발명은 액정표시장치에 관한 것으로, 특히 LED를 광원으로 사용하는 액정표시장치의 휘도 및 색재현율 향상에 관한 것이다.
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal display, and more particularly, to an improvement in luminance and color reproducibility of a liquid crystal display using an LED as a light source.

동화상 표시에 유리하고 콘트라스트비(contrast ratio)가 큰 특징을 보여 TV, 모니터 등에 활발하게 이용되는 액정표시장치(liquid crystal display device : LCD)는 액정의 광학적이방성(optical anisotropy)과 분극성질(polarization)에 의한 화상구현원리를 나타낸다. Liquid crystal display devices (LCDs), which are used for TVs and monitors due to their high contrast ratio and are advantageous for displaying moving images, are characterized by optical anisotropy and polarization of liquid crystals. The principle of image implementation by

이러한 액정표시장치는 나란한 두 기판(substrate) 사이로 액정층을 개재하여 합착시킨 액정패널(liquid crystal panel)을 필수 구성요소로 하며, 액정패널 내의 전기장으로 액정분자의 배열방향을 변화시켜 투과율 차이를 구현한다. Such a liquid crystal display is an essential component of a liquid crystal panel bonded through a liquid crystal layer between two side-by-side substrates, and realizes a difference in transmittance by changing an arrangement direction of liquid crystal molecules with an electric field in the liquid crystal panel. do.

하지만 액정패널은 자체 발광요소를 갖추지 못한 관계로 투과율 차이를 화상으로 표시하기 위해서 별도의 광원을 요구하고, 이를 위해 액정패널 배면에는 광원(光源)이 내장된 백라이트(backlight)가 배치된다. However, since the liquid crystal panel does not have its own light emitting element, a separate light source is required in order to display the difference in transmittance as an image. To this end, a backlight including a light source is disposed on the back of the liquid crystal panel.

여기서, 백라이트 유닛의 광원으로 냉음극형광램프(Cold Cathode Fluorescent Lamp : CCFL), 외부전극형광램프(External Electrode Fluorescentt Lamp), 그리고 발광다이오드(Light Emitting Diode : LED, 이하 LED라 함) 등을 사용한다. Here, a cold cathode fluorescent lamp (CCFL), an external electrode fluorescent lamp (LED), and a light emitting diode (LED) are used as a light source of the backlight unit. .

이중에서 특히, LED는 소형, 저소비 전력, 고신뢰성 등의 특징을 겸비하여 표시용 광원으로서 널리 이용되고 있는 추세이다. Among them, LEDs are particularly widely used as light sources for displays with features such as small size, low power consumption, and high reliability.

도 1은 일반적인 LED를 광원으로 사용한 액정표시장치의 단면도이다. 1 is a cross-sectional view of a liquid crystal display device using a general LED as a light source.

도시한 바와 같이, 일반적인 액정표시장치는 액정패널(10)과 백라이트 유닛(20), 그리고 서포트메인(30)과 커버버툼(50), 탑커버(40)로 구성된다. As illustrated, a general liquid crystal display device includes a liquid crystal panel 10, a backlight unit 20, a support main 30, a cover bottom 50, and a top cover 40.

액정패널(10)은 화상표현의 핵심적인 역할을 담당하는 부분으로써 액정층을 사이에 두고 대면 합착된 제 1 및 제 2 기판(12, 14)으로 구성된다. The liquid crystal panel 10 is a part that plays a key role in image expression and is composed of first and second substrates 12 and 14 bonded to each other with a liquid crystal layer interposed therebetween.

비록 도면상에 나타나지는 않았지만 통상 하부기판 또는 어레이기판이라 불리는 제 1 기판(12)에는 박막트랜지스터(Thin Film Transistor : TFT)가 구비되며, 상부기판 또는 컬러필터기판이라 불리는 제 2 기판(14)의 내면으로는 각 화소에 대응되는 일례로 적(R), 녹(G), 청(B) 색의 컬러필터패턴(color filter pattern) 및 블랙매트릭스(black matrix)가 구비된다. Although not shown in the drawings, a first substrate 12, commonly referred to as a lower substrate or an array substrate, is provided with a thin film transistor (TFT), and a second substrate 14 called an upper substrate or a color filter substrate. As an example corresponding to each pixel, a color filter pattern and a black matrix of red (R), green (G), and blue (B) colors are provided on the inner surface.

그리고 액정패널(10)의 후방으로는 백라이트 유닛(20)이 구비된다. The backlight unit 20 is provided behind the liquid crystal panel 10.

백라이트 유닛(20)은 서포트메인(30)의 적어도 일측 가장자리의 길이방향을 따라 배열되는 LED 어셈블리(29)와, 커버버툼(50) 상에 안착되는 백색 또는 은색의 반사판(25)과, 이러한 반사판(25) 상에 안착되는 도광판(23) 그리고 이의 상부로 개재되는 다수의 광학시트(21)를 포함한다. The backlight unit 20 includes an LED assembly 29 arranged along the longitudinal direction of at least one edge of the support main 30, a white or silver reflecting plate 25 seated on the cover bottom 50, and the reflecting plate. A light guide plate 23 seated on 25 and a plurality of optical sheets 21 interposed thereon.

이때, LED 어셈블리(29)는 도광판(23)의 일측에 구성되며, 백색광을 발하는 다수의 LED(29a)와, 다수의 LED(29a)가 실장되는 LED PCB(printed circuit board : 29b, 이하, PCB라 함)를 포함한다. At this time, the LED assembly 29 is configured on one side of the light guide plate 23, a plurality of LEDs (29a) for emitting white light, LED PCB (printed circuit board: 29b, hereinafter, PCB) is mounted a plurality of LEDs (29a) It includes).

이러한 LED 어셈블리(29)는 접착 등의 방법으로 위치가 고정되어 복수개의 LED(29a)로부터 출사되는 광이 도광판(23)의 입광부와 대면되도록 한다. The LED assembly 29 is fixed in position by bonding or the like so that the light emitted from the plurality of LEDs 29a faces the light incident part of the light guide plate 23.

그리고, 액정패널(10)과 백라이트 유닛(20)은 가장자리가 사각테 형상의 서포트메인(30)으로 둘려진 상태로 액정패널(10)의 상면 가장자리를 두르는 탑커버(40) 그리고 백라이트 유닛(20)의 배면을 덮는 커버버툼(50)이 각각 전후방에서 결합되어 서포트메인(30)을 매개로 일체화된다. In addition, the liquid crystal panel 10 and the backlight unit 20 have a top cover 40 covering the top edge of the liquid crystal panel 10 with the edges surrounded by the rectangular main frame support 30, and the backlight unit 20. Cover cover 50 that covers the back of the) is respectively coupled to the front and rear is integrated through the support main 30.

여기서, 미설명부호 19a, 19b는 각각 액정패널(10)의 전 후면에 부착되어 빛의 편광방향을 제어하는 편광판을 나타낸다. Here, reference numerals 19a and 19b denote polarizers attached to the front and rear surfaces of the liquid crystal panel 10 to control the polarization direction of light, respectively.

따라서, 백라이트 유닛(20)으로부터 발산된 빛은 액정패널(10)을 투과하는 과정에서 컬러필터패턴의 색 조합이 반영되어 컬러화상의 형태로 디스플레이 된다. Therefore, the light emitted from the backlight unit 20 is displayed in the form of a color image by reflecting the color combination of the color filter pattern in the process of passing through the liquid crystal panel 10.

한편, 이렇게 액정표시장치의 광원으로 사용되는 LED(29a)는 빛을 발하는 LED칩과 형광체로 이루어져, LED칩으로부터 빛이 방출되면, 방출된 빛은 형광체를 여기시켜 백색광을 발하게 된다. On the other hand, the LED (29a) used as a light source of the liquid crystal display device is composed of a light emitting LED chip and a phosphor, and when light is emitted from the LED chip, the emitted light excites the phosphor to emit white light.

이러한 LED(29a)는 최근 휘도 향상을 위해서 옐로우 형광체를 많이 사용하고 있는 추세이다. Such LED 29a is a trend to use a lot of yellow phosphor in recent years to improve the brightness.

그러나, 이렇게 옐로우 형광체를 사용하는 LED(29a)를 광원으로 이용하는 액정표시장치는 휘도는 증가되나 색재현율이 감소되는 문제점을 갖는다. However, the liquid crystal display device using the LED 29a using the yellow phosphor as a light source has a problem that the luminance is increased but the color reproduction rate is decreased.

즉, 옐로우 형광체를 사용하는 LED(29a)로부터 출사된 백색광이 액정패널(10)의 적(R), 녹(G), 청(B) 색의 컬러필터패턴을 투과함에 따라 구현되는 색재현율이 감소되는데, 특히, 470 ~ 540nm 파장대의 색재현율이 HDTV(High Definition Television)의 색재현율을 나타낸 색좌표계인 BT.709의 색좌표를 만족하지 못하고 있는 실정이다.
That is, as the white light emitted from the LED 29a using the yellow phosphor penetrates the color filter patterns of red (R), green (G), and blue (B) colors of the liquid crystal panel 10, In particular, the color gamut of the wavelength range of 470 ~ 540nm does not satisfy the color coordinates of BT.709, which is a color coordinate system representing the color gamut of HDTV (High Definition Television).

본 발명은 상기와 같은 문제점을 해결하기 위한 것으로, 옐로우 형광체를 포함하는 LED를 광원으로 사용하는 액정표시장치의 휘도 및 색재현율을 향상시키고자 하는 것을 목적으로 한다.
The present invention has been made to solve the above problems, and an object thereof is to improve luminance and color reproducibility of a liquid crystal display device using an LED including a yellow phosphor as a light source.

전술한 바와 같은 목적을 달성하기 위해, 본 발명은 박막트랜지스터가 구비된 어레이기판과 적색(R), 녹색(G), 청색(B)의 컬러필터패턴이 형성된 컬러필터기판을 포함하는 액정패널과; 상기 액정패널의 하부에 위치하는 반사판과, 상기 반사판 상에 배열되는 발광다이오드와, 상기 발광다이오드 상부에 위치하는 다수의 광학시트로 이루어지는 백라이트 유닛을 포함하며, 상기 적색(R)의 컬러필터패턴은 Red 242 안료와 Red 177 안료가 혼합된 적색(R) 안료를 사용하여 형성되는 액정표시장치를 제공한다. In order to achieve the above object, the present invention provides a liquid crystal panel comprising an array substrate having a thin film transistor and a color filter substrate on which color filter patterns of red (R), green (G) and blue (B) are formed; ; And a backlight unit including a reflective plate positioned below the liquid crystal panel, a light emitting diode arranged on the reflective plate, and a plurality of optical sheets positioned above the light emitting diode, wherein the color filter pattern of red (R) includes: Provided is a liquid crystal display device formed by using a red (R) pigment in which a Red 242 pigment and a Red 177 pigment are mixed.

이때, 상기 Red 242 안료와 Red 177 안료는 45 : 55의 비율로 혼합되며, 상기 녹색(G) 컬러필터패턴은 Green 58 안료와 Yellow 150 안료가 혼합된 녹색(G) 안료를 사용하여 형성된다. At this time, the Red 242 pigment and Red 177 pigment is mixed in a ratio of 45: 55, the green (G) color filter pattern is formed using a green (G) pigment mixed with Green 58 pigment and Yellow 150 pigment.

그리고, 상기 Green 36 안료와 Yellow 150 안료는 90 : 10의 비율로 혼합되며, 상기 청색(B) 컬러필터패턴은 Blue 15:6 안료의 청색(B) 안료를 사용하여 형성된다. The Green 36 pigment and the Yellow 150 pigment are mixed in a ratio of 90:10, and the blue (B) color filter pattern is formed using a blue (B) pigment of Blue 15: 6 pigment.

이때, 상기 LED는 청색LED칩과 옐로우 형광체를 포함하며, 상기 다수의 광학시트 하부에 도광판을 더욱 포함하며, 상기 LED는 상기 도광판의 입광부와 대면하도록 위치하는 것을 특징으로 한다. The LED may include a blue LED chip and a yellow phosphor, and further include a light guide plate under the plurality of optical sheets, and the LED may be positioned to face the light incident part of the light guide plate.

그리고, 상기 어레이기판의 내측면에는, 서로 교차하여 화소영역을 정의하는 게이트 및 데이터배선과, 이들 두 배선과 연결되는 상기 박막트랜지스터와, 상기 박막트랜지스터와 연결된 화소전극이 형성되며, 상기 컬러필터기판의 내측면에는, 상기 게이트 및 데이터배선과 박막트랜지스터에 대응되는 블랙매트릭스와, 상기 컬러필터패턴과 상기 블랙매트릭스를 덮는 공통전극이 형성된다.
On the inner surface of the array substrate, a gate and data wiring crossing each other to define a pixel region, the thin film transistor connected to the two wires, and a pixel electrode connected to the thin film transistor are formed, and the color filter substrate is formed. A black matrix corresponding to the gate, data wiring, and thin film transistor is formed on the inner side of the substrate, and a common electrode covering the color filter pattern and the black matrix is formed.

위에 상술한 바와 같이, 본 발명은 컬러필터층의 적색(R) 컬러필터패턴을 Red 242 안료와 Red 177 안료가 소정의 비율로 혼합 배합된 적색 안료로 형성함으로써, LED를 광원으로 사용하는 액정표시장치의 색재현율을 향상시키게 되는 효과가 있며, BT.709의 색좌표를 만족하게 되는 효과가 있다.
As described above, the present invention forms a red (R) color filter pattern of the color filter layer as a red pigment in which Red 242 pigment and Red 177 pigment are mixed and blended in a predetermined ratio, thereby using an LED as a light source. It has the effect of improving the color reproducibility of, and the effect of satisfying the color coordinates of BT.709.

도 1은 일반적인 LED를 광원으로 사용한 액정표시장치의 단면도.
도 2는 본 발명의 실시예에 따른 액정표시장치모듈의 분해사시도.
도 3은 액정패널의 일부 분해사시도.
도 4a는 적색(R) 안료의 스펙트럼을 나타낸 그래프.
도 4b는 색좌표 상의 BT.709 중첩비를 나타낸 그래프. 1 is a cross-sectional view of a liquid crystal display device using a general LED as a light source.
2 is an exploded perspective view of a liquid crystal display module according to an embodiment of the present invention.
3 is an exploded perspective view of a part of a liquid crystal panel;
4A is a graph showing the spectrum of a red (R) pigment.
4B is a graph showing the BT.709 overlap ratio on the color coordinate;

이하, 도면을 참조하여 본 발명에 따른 실시예를 상세히 설명한다. Hereinafter, embodiments according to the present invention will be described in detail with reference to the drawings.

도 2는 본 발명의 실시예에 따른 액정표시장치모듈의 분해사시도이며, 도 3은 도 2의 액정패널의 일부 분해사시도이다. 2 is an exploded perspective view of a liquid crystal display device module according to an exemplary embodiment of the present invention, and FIG. 3 is a partially exploded perspective view of the liquid crystal panel of FIG. 2.

도 2에 도시한 바와 같이, 액정표시장치모듈은 액정패널(110)과 백라이트 유닛(220), 그리고 서포트메인(230)과 커버버툼(250), 탑커버(240)로 구성된다. As shown in FIG. 2, the LCD module includes a liquid crystal panel 110, a backlight unit 220, a support main 230, a cover bottom 250, and a top cover 240.

먼저, 액정패널(110)에 대해서 이의 일부 분해사시도인 도 3을 함께 참조하여 좀더 자세히 살펴보면, 어레이기판(112)의 일면에는 복수개의 데이터배선(118)과 게이트배선(116)이 종횡 교차하여 화소영역(P)을 정의한다. First, the liquid crystal panel 110 will be described in more detail with reference to FIG. 3, which is an exploded perspective view of the liquid crystal panel 110. On one surface of the array substrate 112, a plurality of data lines 118 and gate lines 116 vertically and horizontally cross each other. Define the area P.

이들 두 배선(116, 118)의 교차지점에는 박막트랜지스터(T)가 구비되어 각 화소영역(P)에 마련된 투명 화소전극(124)과 일대일 대응 접속된다. The thin film transistor T is provided at the intersection of the two wirings 116 and 118 so as to be connected one-to-one with the transparent pixel electrode 124 provided in each pixel region P. FIG.

또한 액정층(150)을 사이에 두고 이와 마주보는 컬러필터기판(114)의 일면에는 어레이기판(112)의 데이터배선(118)과 게이트배선(116) 그리고 박막트랜지스터(T) 등의 비표시 요소를 가리면서 화소전극(124) 만을 노출시키도록 화소영역(P)을 두르는 격자 형상의 블랙매트릭스(132)가 구성된다. In addition, a non-display element such as a data line 118, a gate line 116, and a thin film transistor T of the array substrate 112 may be disposed on one surface of the color filter substrate 114 facing the liquid crystal layer 150 therebetween. A black matrix 132 having a lattice shape that surrounds the pixel region P is formed to expose only the pixel electrode 124 while covering.

또한, 이들 격자 내부에서 각 화소영역(P)에 대응되게 순차적으로 반복 배열되는 일례로 적(R), 녹(G), 청색(B)의 컬러필터층(134) 그리고 이들 모두를 덮는 투명 공통전극(136)을 포함한다. In addition, a transparent common electrode covering the red (R), green (G), and blue (B) color filter layers 134 and all of them are sequentially arranged in order to correspond to each pixel region P in the lattice. 136.

이때, 본 발명의 적(R), 녹(G), 청색(B)의 컬러필터층(134) 중 적색(R) 컬러필터패턴은 Red 242안료와 Red 177안료가 45 :55의 비율로 혼합된 적색(R) 안료로 형성되는 것을 특징으로 한다. At this time, the red (R) color filter pattern of the red (R), green (G), blue (B) color filter layer 134 of the present invention is a mixture of Red 242 pigment and Red 177 pigment in the ratio of 45:55 It is characterized by being formed as a red (R) pigment.

어레이기판(112) 및 컬러필터기판(114)의 각각 외면으로는 특정 빛만을 선택적으로 투과시키는 편광판(119a, 119b)이 부착된다. Polarizing plates 119a and 119b for selectively transmitting only specific light are attached to the outer surfaces of the array substrate 112 and the color filter substrate 114.

아울러 비록 도면상에 명확하게 나타나지는 않았지만 이들 어레이기판(112) 및 컬러필터기판(114)과 액정층(150)의 경계부분에는 액정의 초기 분자배열 방향을 결정하는 상, 하부 배향막이 개재되고, 어레이기판(112) 및 컬러필터기판(114) 사이로 충진되는 액정층(150)의 누설을 방지하기 위해 양 기판(112, 114)의 가장자리를 따라 씰패턴(seal pattern : 미도시)이 형성된다. Although not clearly shown in the drawings, upper and lower alignment layers interposing the array substrate 112, the color filter substrate 114, and the liquid crystal layer 150 determine the initial molecular alignment direction of the liquid crystal. Seal patterns (not shown) are formed along edges of both substrates 112 and 114 to prevent leakage of the liquid crystal layer 150 filled between the array substrate 112 and the color filter substrate 114.

특히 이중 어레이기판(112)은 컬러필터기판(114) 보다 큰 사이즈를 가지고 있어, 이들의 합착 시 어레이기판(112)의 일측 가장자리가 외부로 노출되는데, 여기에는 각각 다수의 데이터배선(118)과 연결된 복수개의 데이터패드(122) 그리고 다수의 게이트배선(116)과 연결된 복수개의 게이트패드(미도시)가 위치한다. In particular, since the dual array substrate 112 has a larger size than the color filter substrate 114, one side edge of the array substrate 112 is exposed to the outside when they are bonded to each other, and each of the plurality of data wires 118 and A plurality of data pads 122 connected to each other and a plurality of gate pads (not shown) connected to the plurality of gate wirings 116 are positioned.

이때, 이들 복수개의 데이터패드(122)와 게이트패드(미도시)는 각각 테이프케리어패키지(tape carrier package : TCP)와 같은 연결부재(216)를 매개로 외부의 인쇄회로기판(218)과 연결되는데, 인쇄회로기판(218)에는 컴퓨터 등의 외부장치에서 입력된 각종 신호정보를 일차적으로 가공하여 화상표현에 필요한 신호전압을 공급하는 타이밍콘트롤러, 감마전압생성부 등이 실장된다. In this case, the plurality of data pads 122 and the gate pads (not shown) are respectively connected to the external printed circuit board 218 through a connection member 216 such as a tape carrier package (TCP). The printed circuit board 218 is equipped with a timing controller, a gamma voltage generator, and the like, which primarily process various signal information input from an external device such as a computer to supply a signal voltage required for image display.

이 같은 인쇄회로기판(218)은 모듈화 과정에서 서포트메인(230)의 측면 내지는 커버버툼(250) 배면으로 젖혀 밀착된다. The printed circuit board 218 is folded and adhered to the side of the support main 230 or the back of the cover bottom 250 during the modularization process.

아울러, 연결부재(216)에는 인쇄회로기판(218)으로부터 전달된 신호전압을 통해서 액정패널(110)의 데이터배선(118)으로 전달되는 화상신호와 게이트배선(116)으로 전달되며 박막트랜지스터(T)의 온/오프(on/off)신호가 포함된 주사신호를 생성 및 출력하는 데이터 및 게이트드라이버IC가 실장되어 있다. In addition, the connection member 216 is transferred to the image signal and the gate wiring 116 transmitted to the data wiring 118 of the liquid crystal panel 110 through the signal voltage transmitted from the printed circuit board 218 and the thin film transistor T A data driver and gate driver IC for generating and outputting a scan signal including the on / off signal of the "

따라서, 박막트랜지스터(T)의 온(on)/오프(off)를 위한 신호가 게이트배선(16)으로 순차적으로 스캔 인가되어, 데이터배선(118)의 화상신호가 선택된 화소영역(P)의 화소전극(124)으로 화상신호가 전달되면 이들 사이의 전계에 의해 어레이기판 및 컬러필터기판(112, 114) 사이의 액정 분자가 구동되고, 이에 따른 빛의 투과율 변화로 여러 가지 화상을 표시할 수 있다. Accordingly, the signals for turning on / off the thin film transistor T are sequentially scanned and applied to the gate wiring 16, so that the image signal of the data wiring 118 is selected. When the image signal is transmitted to the electrode 124, the liquid crystal molecules between the array substrate and the color filter substrates 112 and 114 are driven by the electric field therebetween, and various images can be displayed by the change in the transmittance of light. .

아울러 본 발명에 따른 액정표시장치모듈에는 액정패널(110)이 나타내는 투과율의 차이가 외부로 발현되도록 이의 배면에서 빛을 공급하는 백라이트 유닛(220)이 구비된다. In addition, the liquid crystal display module according to the present invention is provided with a backlight unit 220 for supplying light from the rear side of the liquid crystal panel 110 so that the difference in transmittance is expressed to the outside.

백라이트 유닛(220)은 LED 어셈블리(229)와, 백색 또는 은색의 반사판(225)과, 이러한 반사판(225) 상에 안착되는 도광판(223) 그리고 이의 상부로 개재되는 다수의 광학시트(221)를 포함한다. The backlight unit 220 includes an LED assembly 229, a white or silver reflector 225, a light guide plate 223 seated on the reflector 225, and a plurality of optical sheets 221 interposed thereon. Include.

앞서 말한 LED 어셈블리(229)는 도광판(223)의 입광부와 대면하도록 도광판(223)의 일측에 위치하며, 이러한 LED 어셈블리(229)는 광을 출사하는 다수개의 LED(229a)와, 이의 LED(229a)가 일정 간격 이격하여 장착되는 PCB(229b)를 포함한다. The above-described LED assembly 229 is located on one side of the light guide plate 223 so as to face the light-receiving portion of the light guide plate 223, and the LED assembly 229 includes a plurality of LEDs 229a for emitting light and LEDs thereof. 229a) includes a PCB 229b mounted at regular intervals.

여기서, LED(229a)는 크게 빛을 발하는 LED칩(미도시)과 형광체(미도시)로 이루어져, LED칩(미도시)으로부터 빛이 방출되면, 방출된 빛은 형광체(미도시)를 여기시켜 광을 발하게 된다. Here, the LED 229a is composed of an LED chip (not shown) and a phosphor (not shown) that emits large light. When light is emitted from the LED chip (not shown), the emitted light excites the phosphor (not shown). It will shine.

이때, LED(229a)는 휘도 향상을 위하여, 청색LED칩(미도시)과 530 ~ 570nm의 파장을 주파장으로 하는 세륨(Ce)이 도핑된 이트륨(Y) 알루미늄(Al) 가넷인 YAG:Ce(T3Al5O12:Ce) 계열의 옐로우 형광체(미도시)로 이루어지도록 한다. At this time, the LED 229a is YAG: Ce, which is a yttrium (Y) aluminum (Al) garnet doped with a blue LED chip (not shown) and cerium (Ce) having a wavelength of 530 to 570 nm as a main wavelength. It is made of a yellow phosphor (not shown) of the (T3Al5O12: Ce) series.

여기서 주파장이란 적(R), 녹(G), 청색(B) 각각에서 가장 높은 휘도를 발생하는 파장을 그 형광체의 주 파장이라고 한다.Here, the dominant wavelength is referred to as the wavelength of the phosphor that generates the highest luminance in each of red (R), green (G), and blue (B).

도광판(223)은 LED(229a)로부터 입사된 빛이 여러번의 전반사에 의해 도광판(223) 내를 진행하면서 도광판(223)의 넓은 영역으로 골고루 퍼져 액정패널(110)에 면광원을 제공한다. The light guide plate 223 evenly spreads the light incident from the LED 229a to the wide area of the light guide plate 223 while propagating through the light guide plate 223 by several total reflections to provide the surface light source to the liquid crystal panel 110.

이러한 도광판(223)은 균일한 면광원을 공급하기 위해 배면에 특정 모양의 패턴을 포함할 수 있다. The light guide plate 223 may include a pattern of a specific shape on the rear surface to supply a uniform surface light source.

반사판(225)은 도광판(223)의 배면에 위치하여, 도광판(223)의 배면을 통과한 빛을 액정패널(110) 쪽으로 반사시킴으로써 빛의 휘도를 더욱 향상시킨다. The reflective plate 225 is disposed on the rear surface of the light guide plate 223 to further reflect the light passing through the rear surface of the light guide plate 223 toward the liquid crystal panel 110 to further improve the brightness of the light.

도광판(223) 상부에 형성되는 다수의 광학시트(221)는 확산시트와 적어도 하나의 집광시트 등을 포함하며, 도광판(223)을 통과한 빛을 확산 또는 집광하여 보다 균일한 면광원이 액정패널(110)로 입사 되도록 한다. The plurality of optical sheets 221 formed on the light guide plate 223 include a diffusion sheet, at least one light collecting sheet, and the like, and diffuse or collect light passing through the light guide plate 223 to provide a more uniform surface light source. To be incident on (110).

이러한 액정패널(110)과 백라이트 유닛(220)은 탑커버(240)와 서포트메인(230) 그리고 커버버툼(250)을 통해 모듈화 되는데, 탑커버(240)는 액정패널(110)의 상면 및 측면 가장자리를 덮도록 단면이“ㄱ”형태로 절곡된 사각테 형상으로, 탑커버(240)의 전면을 개구하여 액정패널(110)에서 구현되는 화상을 표시하도록 구성한다. The liquid crystal panel 110 and the backlight unit 220 are modularized through the top cover 240, the support main 230, and the cover bottom 250. The top cover 240 is the top and side surfaces of the liquid crystal panel 110. A rectangular frame having a cross section bent in a shape of “a” so as to cover an edge thereof is configured to open an entire surface of the top cover 240 to display an image implemented in the liquid crystal panel 110.

또한, 액정패널(110) 및 백라이트 유닛(220)이 안착하여 액정표시장치모듈 전체 기구물 조립에 기초가 되는 커버버툼(250)은 사각모양의 하나의 판 형상으로 이의 일측 가장자리가 소정높이 수직 절곡하여 구성한다. In addition, the liquid crystal panel 110 and the backlight unit 220 are seated, and the cover bottom 250, which is the basis for assembling the entire apparatus of the liquid crystal display device module, has a rectangular plate shape and one side edge thereof is vertically bent at a predetermined height. Configure.

이러한 커버버툼(250) 상에 안착되며 액정패널(110) 및 백라이트 유닛(220)의 가장자리를 두르는 사각테 형상의 서포트메인(230)이 탑커버(240) 및 커버버툼(250)과 결합된다. A support main 230 having a rectangular frame shape seated on the cover bottom 250 and surrounding the edges of the liquid crystal panel 110 and the backlight unit 220 is combined with the top cover 240 and the cover bottom 250.

이때, 탑커버(240)는 케이스탑 또는 탑케이스라 일컬어지기도 하고, 서포트메인(230)은 가이드패널 또는 메인서포트, 몰드프레임이라 일컬어지기도 하며, 커버버툼(250)은 버텀커버 또는 하부커버라 일컬어지기도 한다. In this case, the top cover 240 may also be referred to as a case top or a top case, and the support main 230 may also be referred to as a guide panel or a main support and a mold frame, and the cover bottom 250 may be referred to as a bottom cover or a lower cover. It is also built.

한편, 본 발명의 액정표시장치는 휘도 향상을 위해 옐로우 형광체(미도시)를 포함하는 LED(229a)를 백라이트 유닛(220)의 광원으로 사용함에도, LED(229a)로부터 출사된 백색광이 액정패널(110)의 적(R), 녹(G), 청(B) 색의 컬러필터층(134)을 투과함에 따라 구현되는 색재현율이 HDTV(High Definition Television)의 색재현율을 나타낸 색좌표계인 BT.709의 색좌표를 기존에 비해 보다 만족하게 된다.Meanwhile, in the liquid crystal display of the present invention, even when the LED 229a including the yellow phosphor (not shown) is used as a light source of the backlight unit 220, the white light emitted from the LED 229a is used to improve the luminance. BT.709, which is a color coordinate system representing the color reproduction rate of HDTV (High Definition Television), as the color reproduction rate realized by passing through the color filter layer 134 of red (R), green (G), and blue (B) colors of 110). The color coordinate of is more satisfied than before.

이는 본 발명의 컬러필터층(134)의 적색(R) 컬러필터패턴을 Red 242 안료와 Red 177 안료가 45 : 55의 비율로 혼합 배합된 적색(R) 안료로 형성하기 때문이다. This is because the red (R) color filter pattern of the color filter layer 134 of the present invention is formed of a red (R) pigment in which Red 242 pigment and Red 177 pigment are mixed in a ratio of 45:55.

즉, 본 발명의 옐로우 형광체(미도시)를 포함하는 LED(229a)를 백라이트 유닛(220)의 광원으로 사용하는 액정표시장치는 컬러필터층(134)의 적색(R) 컬러필터패턴을 이루는 안료를, 위의 BT.709의 색좌표를 만족할 수 있도록 새로이 배합하기 때문이다. That is, the liquid crystal display device using the LED 229a including the yellow phosphor (not shown) of the present invention as a light source of the backlight unit 220 may use a pigment forming a red (R) color filter pattern of the color filter layer 134. This is because it is newly formulated to satisfy the color coordinates of BT.709 above.

이에 대해 좀더 자세히 살펴보면, 컬러필터층(134)의 적색(R) 컬러필터패턴은 Red 242 안료와 Red 177 안료가 바람직하게는 45 : 55의 비율로 혼합 배합된 적색(R) 안료로 이루어지는데, 여기서, Red 177 안료는 Red 242 안료 대비 휘도가 낮은 특성을 갖는다. In detail, the red (R) color filter pattern of the color filter layer 134 is composed of a red (R) pigment in which Red 242 pigment and Red 177 pigment are preferably mixed and blended in a ratio of 45:55. , Red 177 pigment has lower brightness than Red 242 pigment.

따라서, Red 242 안료와 Red 177 안료를 45 : 55의 비율로 혼합함으로써, 본 발명의 적색(R) 안료는 심적색 컬러(deep red color)를 구현하게 된다. Accordingly, by mixing the Red 242 pigment and the Red 177 pigment in a ratio of 45:55, the red (R) pigment of the present invention implements a deep red color.

아래 표(1)은 본 발명의 적색(R) 컬러안료를 통해 적색(R) 컬러필터패턴을 형성한 액정표시장치의 색좌표를 나타낸 표로써, 기존의 일반적인 적색(R) 컬러안료를 통해 적색(R) 컬러필터패턴을 형성한 액정표시장치의 색좌표와 비교하여 나타내었다.
The following table (1) shows the color coordinates of the liquid crystal display device in which the red (R) color filter pattern is formed through the red (R) color pigment of the present invention. R) shown in comparison with the color coordinate of the liquid crystal display device in which the color filter pattern was formed.

조건Condition 적색(Red)Red 녹색(Green)Green 청색(Blue)Blue 백색(White)White BT.709
중첩비BT.709
Nesting ratio 안료Pigment xx YY YY xx yy YY XX YY YY xx yy YY R1R1 0.64770.6477 0.33300.3330 87.0387.03 0.30250.3025 0.60330.6033 365.42365.42 0.15080.1508 0.05730.0573 49.9849.98 0.27720.2772 0.28880.2888 501.48501.48 99.20%99.20% R2R2 0.63620.6362 0.33640.3364 84.0084.00 0.30250.3025 0.60330.6033 365.42365.42 0.15080.1508 0.05730.0573 49.9849.98 0.27720.2772 0.28880.2888 501.48501.48 96.9%96.9%

R1는 본 발명의 실시예에 따른 적색(R) 안료를 통해 적색(R) 컬러필터패턴을 형성한 액정표시장치를 통해 구현되는 각 색상의 색좌표를 나타내며, R2는 일반적인 적색(R) 안료를 통해 적색(R) 컬러필터패턴을 형성한 액정표시장치를 통해 구현되는 각 색상의 색좌표를 나타내었다. R1 represents a color coordinate of each color implemented through the liquid crystal display device in which a red (R) color filter pattern is formed through a red (R) pigment according to an embodiment of the present invention, and R2 represents a general red (R) pigment. The color coordinates of each color implemented through the liquid crystal display device having the red (R) color filter pattern are shown.

표(1)을 참조하며, R1과 R2의 녹색(Green) 및 청색(Blue)의 색좌표에서는 차이가 없으나, 적색(Red) 색좌표에서 차이가 나타나는 것을 확인할 수 있다. Referring to Table (1), there is no difference in the green and blue color coordinates of R1 and R2, but it can be seen that a difference occurs in the red color coordinate.

즉, 본 발명의 Red 242 안료와 Red 177 안료를 45 : 55의 비율로 혼합한 적색(R) 안료와 일반적인 적색(R) 안료는 색좌표 상에서 차이를 가지며, 이는, 도 4a의 적색(R) 안료의 스펙트럼을 나타낸 그래프를 참조하면 더욱 쉽게 확인할 수 있다. That is, the red (R) pigment and the general red (R) pigment, which are mixed with the Red 242 pigment and the Red 177 pigment in a ratio of 45:55, have a difference in color coordinates, which is the red (R) pigment of FIG. 4A. Refer to the graph showing the spectrum of the light.

또한, 이렇게 적색(R)의 색좌표가 변동됨에 따라, BT.709의 중첩비가 달라지는 것을 확인할 수 있는데, R1의 BT.709 중첩비가 98.9%로, R2의 BT.709 중첩비인 96.9%에 비해 높은 것을 알 수 있다. In addition, as the color coordinate of red (R) is changed, it can be seen that the overlap ratio of BT.709 is different. The BT.709 overlap ratio of R1 is 98.9%, which is higher than the BT.709 overlap ratio of R2 of 96.9%. Able to know.

이를 통해, 옐로우 형광체(미도시)를 포함하는 LED(229a)로부터 출사된 백색광이 액정패널(110)의 적(R), 녹(G), 청(B) 색의 컬러필터층(134)을 투과함에 따라 구현되는 색재현율이 HDTV(High Definition Television)의 색재현율을 나타낸 색좌표계인 BT.709의 색좌표를 기존에 비해 보다 만족하게 되는 것을 알 수 있다.Through this, white light emitted from the LED 229a including the yellow phosphor (not shown) is transmitted through the color filter layer 134 of red (R), green (G), and blue (B) colors of the liquid crystal panel 110. As can be seen, the color gamut implemented in the color coordinate system of BT.709, which represents the color gamut of HDTV (High Definition Television), is more satisfactory than before.

여기서, 색재현율이란 액정표시장치를 포함한 표시장치가 표현할 수 있는 색의 범위를 말하며, 이는 적색(R), 녹색(G), 청색(B) 상태의 색좌표와 휘도를 각각 측정하고, 이를 바탕으로 삼원색(3 Primary Colors)에 대하여 색재현율(Color Reproduction)을 구할 수 있다. Here, the color gamut refers to a range of colors that can be expressed by a display device including a liquid crystal display device, which measures color coordinates and luminance of red (R), green (G), and blue (B) states, respectively. Color Reproduction can be obtained for three primary colors.

색좌표는 통상적으로 색을 측정한 다음 각각을 구별하기 위하여 표시하는 과학적인 양이며, 적색(700nm), 녹색(546.1nm), 청색(435.8nm)의 좌표값을 국제조명위원회(CIE: The International Commission on Illumination)가 1931년 지정한 좌표계 위에 표시한 것이다. Color coordinates are usually scientific quantities that measure colors and then display them to distinguish between them. The coordinates of red (700 nm), green (546.1 nm), and blue (435.8 nm) are measured by the International Commission on Illumination. on Illumination) is shown above the coordinate system specified in 1931.

색재현율에 대해 좀 더 자세히 설명하면, 도 4b에 도시한 바와 같이 색좌표 상에 결정된 적(R), 녹(G), 청색(B) 각각의 색좌표를 연결하면 삼각형의 면적을 산출할 수 있고, 색재현율은 위의 면적을 NTSC(국제 TV 표준 위원회) 색좌표의 면적과 비교하여 산출할 수 있다. When the color reproducibility is described in more detail, as shown in FIG. 4B, when the color coordinates of each of red (R), green (G), and blue (B) determined on the color coordinates are connected, an area of a triangle can be calculated. The color gamut can be calculated by comparing the area above with the area of the NTSC color coordinates.

즉, 색재현율은 NTSC의 색좌표 면적의 값을 100으로 가정했을 때의 상대적인 면적의 비로써 나타낸 것이다. In other words, the color reproducibility is expressed as the ratio of the relative area when the value of the color coordinate area of NTSC is assumed to be 100.

이로 인하여, HDTV(High Definition Television)의 색재현율을 나타낸 색좌표계인 BT.709의 색좌표가 A의 면적으로 구현된다면, 일반적인 적색(R) 안료를 포함하는 액정표시장치는 색좌표 상에서 B의 면적으로 구현되며, 본 발명의 실시예에 따른 적색(R) 안료를 포함하는 액정표시장치는 C의 면적으로 구현되게 된다. Thus, if the color coordinate of BT.709, which is the color coordinate system representing the color reproducibility of HDTV (High Definition Television), is implemented as the area of A, a liquid crystal display including a general red (R) pigment is implemented as the area of B on the color coordinate. In addition, the liquid crystal display device including the red (R) pigment according to the embodiment of the present invention is implemented to the area of C.

따라서, 위의 BT.709 중첩비란, 색좌표 상에서 A의 면적과 중첩되는 양을 말하며, C의 면적이 B의 면적에 비해 약 3% 정도 더 A의 면적과 중첩됨을 알 수 있다. Therefore, the BT.709 overlap ratio refers to the amount overlapping the area of A on the color coordinate, and the area of C overlaps the area of A by about 3% more than the area of B.

이를 통해, 본 발명의 적색(R) 안료를 포함하는 액정표시장치는 HDTV(High Definition Television)의 색재현율을 나타낸 색좌표계인 BT.709의 색좌표를 기존에 비해 보다 만족하게 되며, 색재현율이 기존의 적색(R) 안료를 포함하는 액정표시장치에 비해 향상되었음을 알 수 있는 것이다. Through this, the liquid crystal display device including the red (R) pigment of the present invention satisfies the color coordinate of BT.709, which is the color coordinate system representing the color reproduction ratio of HDTV (High Definition Television), and the color reproduction ratio is It can be seen that compared to the liquid crystal display device containing a red (R) pigment.

또한, 본 발명의 액정표시장치는 녹색(G) 컬러필터패턴을 Green 58 안료와 Yellow 150안료가 바람직하게는 90 : 10의 비율로 혼합 배합된 녹색(G) 안료로 이루어지도록 하며, 청색(B) 컬러필터패턴은 Blue 15:6 안료만 이루어지도록 할 수 있다. In addition, the liquid crystal display device of the present invention is made of a green (G) color filter pattern is composed of a green (G) pigment in which Green 58 pigment and Yellow 150 pigment are preferably blended in a ratio of 90:10, and blue (B). ) The color filter pattern can be made of only Blue 15: 6 pigment.

여기서, 녹색(G) 안료는 Green 36 안료가 많이 함유됨으로써, 녹색(G) 안료 또한 심녹색 컬러(deep green color)를 구현하게 되며, 청색(B) 안료 또한 심청색 컬러(deep blue color)를 구현하게 된다. Here, the green (G) pigment contains a lot of Green 36 pigments, so that the green (G) pigment also realizes a deep green color, and the blue (B) pigment also realizes a deep blue color. Done.

여기서, 기존의 청색(B) 안료는 Blue 15:6 안료와 보조안료인 violet 23을 혼합 배합하여 사용하는데, violet 23은 명암비를 저하시키는 요인으로 작용하게 된다. Here, the existing blue (B) pigment is used by mixing and mixing the blue 15: 6 pigment and auxiliary pigment violet 23, violet 23 acts as a factor to decrease the contrast ratio.

이에, 본 발명의 청색(B) 안료는 Blue 15:6 안료만으로 이루어짐에 따라, 심청색 컬러(deep blue color)를 구현하게 되는 것이다. Thus, as the blue (B) pigment of the present invention is composed of only the Blue 15: 6 pigment, it is to implement a deep blue color (deep blue color).

따라서, 녹색(G) 안료와 청색(B) 안료를 포함하는 액정표시장치의 색좌표 상에서의 면적 또한 기존의 녹색(G) 및 청색(B) 안료를 포함하는 액정표시장치에 비해 BT.709의 색좌표 면적과 더욱 중첩되며, 이를 통해, 본 발명의 실시예에 따른 녹색(G) 및 청색(B) 안료 또한 HDTV(High Definition Television)의 색재현율을 나타낸 색좌표계인 BT.709의 색좌표를 기존에 비해 보다 만족하게 되며, 색재현율을 향상시키게 된다.Therefore, the area on the color coordinates of the liquid crystal display device including the green (G) pigment and the blue (B) pigment is also the color coordinate of BT.709 compared to the conventional liquid crystal display device containing the green (G) and blue (B) pigments. The color coordinates of BT.709, which is a color coordinate system representing color gamut of HDTV (High Definition Television), are also compared to the conventional green (G) and blue (B) pigments according to the present invention. It will be more satisfactory and improve the color reproduction rate.

도 6을 참조하면, HDTV(High Definition Television)의 색재현율을 나타낸 색좌표계인 BT.709의 색좌표가 A’의 면적으로 구현된다면, 일반적인 청색(B) 안료를 포함하는 액정표시장치는 색좌표상에서 B’의 면적으로 구현되며, 본 발명의 실시예에 따른 청색(B) 안료를 포함하는 액정표시장치는 C’의 면적으로 구현되게 된다. Referring to FIG. 6, if a color coordinate of BT.709, which is a color coordinate system representing a color definition of a high definition television (HDTV), is implemented as the area of A ', a liquid crystal display including a general blue (B) pigment may have a color B on the color coordinate. The liquid crystal display device including the blue (B) pigment according to the embodiment of the present invention is implemented as the area of 'C'.

따라서, 위의 BT.709 중첩비란, 색좌표상에서 A’의 면적과 중첩되는 양을 말하며, C’의 면적이 B’의 면적에 비해 약 2% 정도 더 A’의 면적과 중첩됨을 알 수 있다. Therefore, the BT.709 overlap ratio is an amount overlapping the area of A 'on the color coordinate, and it can be seen that the area of C' overlaps with the area of A 'about 2% more than the area of B'.

이를 통해, Blue 15:6 안료로 형성되는 청색 컬러필터패턴을 포함하는 액정표시장치 또한 HDTV(High Definition Television)의 색재현율을 나타낸 색좌표계인 BT.709의 색좌표를 기존에 비해 보다 만족하게 됨을 알 수 있다. Through this, it was found that the LCD including the blue color filter pattern formed of the Blue 15: 6 pigment also satisfies the color coordinates of BT.709, which is the color coordinate system representing the color reproducibility of HDTV (High Definition Television), compared to the conventional one. Can be.

전술한 바와 같이, 본 발명은 컬러필터층(134)의 적색(R) 컬러필터패턴을 Red 242 안료와 Red 177 안료가 바람직하게는 45 : 55의 비율로 혼합 배합된 적색(R) 안료로 형성하며, 녹색(G) 컬러필터패턴은 Green 58 안료와 Yellow 150안료가 바람직하게는 90 : 10의 비율로 혼합 배합된 녹색(G) 안료로 형성하며, 청색(B) 컬러필터패턴은 Blue 15:6 안료로 이루어지는 청색(B) 안료로 형성함으로써, LED(229a)를 광원으로 사용하는 액정표시장치의 색재현율을 향상시키게 된다. As described above, the present invention forms the red (R) color filter pattern of the color filter layer 134 as a red (R) pigment in which Red 242 pigment and Red 177 pigment are preferably mixed and blended at a ratio of 45:55. The green (G) color filter pattern is formed of a green (G) pigment in which Green 58 pigment and Yellow 150 pigment are preferably mixed in a ratio of 90:10, and the blue (B) color filter pattern is Blue 15: 6 By forming with the blue (B) pigment which consists of a pigment, the color reproducibility of the liquid crystal display device which uses LED229a as a light source is improved.

이로 인하여, HDTV(High Definition Television)의 색재현율을 나타낸 색좌표계인 BT.709의 색좌표를 만족하게 된다. This satisfies the color coordinates of BT.709, the color coordinate system representing the color reproduction ratio of HDTV (High Definition Television).

본 발명은 상기 실시예로 한정되지 않고, 본 발명의 취지를 벗어나지 않는 한도내에서 다양하게 변경하여 실시할 수 있다. The present invention is not limited to the above embodiments, and various modifications can be made without departing from the spirit of the present invention.

Claims (8)

박막트랜지스터가 구비된 어레이기판과 적색(R), 녹색(G), 청색(B)의 컬러필터패턴이 형성된 컬러필터기판을 포함하는 액정패널과;
상기 액정패널의 하부에 위치하는 반사판과, 상기 반사판 상에 배열되는 발광다이오드와, 상기 발광다이오드 상부에 위치하는 다수의 광학시트로 이루어지는 백라이트 유닛
을 포함하며, 상기 적색(R)의 컬러필터패턴은 Red 242 안료와 Red 177 안료가 혼합된 적색(R) 안료를 사용하여 형성되는 액정표시장치.
A liquid crystal panel including an array substrate having a thin film transistor and a color filter substrate on which color filter patterns of red (R), green (G), and blue (B) are formed;
A backlight unit comprising a reflector plate positioned below the liquid crystal panel, a light emitting diode arranged on the reflecting plate, and a plurality of optical sheets positioned on the light emitting diode.
Wherein the color filter pattern of red (R) is formed using a red (R) pigment in which Red 242 pigment and Red 177 pigment are mixed.
제 1 항에 있어서,
상기 Red 242 안료와 Red 177 안료는 45 : 55의 비율로 혼합된 액정표시장치.
The method of claim 1,
The Red 242 and Red 177 pigments are mixed in a ratio of 45:55.
제 1 항에 있어서,
상기 녹색(G) 컬러필터패턴은 Green 58 안료와 Yellow 150 안료가 혼합된 녹색(G) 안료를 사용하여 형성되는 액정표시장치.
The method of claim 1,
The green (G) color filter pattern is formed using a green (G) pigment mixed with a Green 58 pigment and a Yellow 150 pigment.
제 3 항에 있어서,
상기 Green 36 안료와 Yellow 150 안료는 90 : 10의 비율로 혼합된 액정표시장치.
The method of claim 3, wherein
Wherein the Green 36 pigment and Yellow 150 pigment are mixed in a ratio of 90:10.
제 1 항에 있어서,
상기 청색(B) 컬러필터패턴은 Blue 15:6 안료의 청색(B) 안료를 사용하여 형성되는 액정표시장치.
The method of claim 1,
The blue (B) color filter pattern is formed using a blue (B) pigment of Blue 15: 6 pigment.
제 1 항에 있어서,
상기 LED는 청색LED칩과 옐로우 형광체를 포함하는 액정표시장치.
The method of claim 1,
The LED includes a blue LED chip and a yellow phosphor.
제 1 항에 있어서,
상기 다수의 광학시트 하부에 도광판을 더욱 포함하며, 상기 LED는 상기 도광판의 입광부와 대면하도록 위치하는 것을 특징으로 하는 액정표시장치.
The method of claim 1,
And a light guide plate beneath the plurality of optical sheets, wherein the LED is positioned to face the light incident part of the light guide plate.
제 1 항에 있어서,
상기 어레이기판의 내측면에는,
서로 교차하여 화소영역을 정의하는 게이트 및 데이터배선과, 이들 두 배선과 연결되는 상기 박막트랜지스터와, 상기 박막트랜지스터와 연결된 화소전극이 형성되며,
상기 컬러필터기판의 내측면에는,
상기 게이트 및 데이터배선과 박막트랜지스터에 대응되는 블랙매트릭스와, 상기 컬러필터패턴과 상기 블랙매트릭스를 덮는 공통전극이 형성된 액정표시장치. The method of claim 1,
On the inner side of the array substrate,
A gate and data wiring crossing each other to define a pixel region, the thin film transistor connected to the two wirings, and a pixel electrode connected to the thin film transistor are formed.
On the inner side of the color filter substrate,
And a black matrix corresponding to the gate, data wiring, and thin film transistor, and a common electrode covering the color filter pattern and the black matrix.
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KR20140082203A (en) * 2012-12-24 2014-07-02 엘지디스플레이 주식회사 Liquid crystal display device

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KR20140082203A (en) * 2012-12-24 2014-07-02 엘지디스플레이 주식회사 Liquid crystal display device

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