KR101490307B1 - Back light unit having consistution of connection series structure using flexible flat cable - Google Patents

Back light unit having consistution of connection series structure using flexible flat cable Download PDF

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KR101490307B1
KR101490307B1 KR20130094013A KR20130094013A KR101490307B1 KR 101490307 B1 KR101490307 B1 KR 101490307B1 KR 20130094013 A KR20130094013 A KR 20130094013A KR 20130094013 A KR20130094013 A KR 20130094013A KR 101490307 B1 KR101490307 B1 KR 101490307B1
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South Korea
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flat cable
flexible flat
lamps
liquid crystal
backlight unit
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KR20130094013A
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Korean (ko)
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이한준
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주식회사 한광
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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
    • G02F1/1336—Illuminating devices
    • G02F1/133615—Edge-illuminating devices, i.e. illuminating from the side
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
    • F21K9/00—Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
    • F21K9/60—Optical arrangements integrated in the light source, e.g. for improving the colour rendering index or the light extraction
    • F21K9/61—Optical arrangements integrated in the light source, e.g. for improving the colour rendering index or the light extraction using light guides
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0081—Mechanical or electrical aspects of the light guide and light source in the lighting device peculiar to the adaptation to planar light guides, e.g. concerning packaging
    • G02B6/0083—Details of electrical connections of light sources to drivers, circuit boards, or the like
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R12/00—Structural associations of a plurality of mutually-insulated electrical connecting elements, specially adapted for printed circuits, e.g. printed circuit boards [PCB], flat or ribbon cables, or like generally planar structures, e.g. terminal strips, terminal blocks; Coupling devices specially adapted for printed circuits, flat or ribbon cables, or like generally planar structures; Terminals specially adapted for contact with, or insertion into, printed circuits, flat or ribbon cables, or like generally planar structures
    • H01R12/70—Coupling devices
    • H01R12/71—Coupling devices for rigid printing circuits or like structures
    • H01R12/72—Coupling devices for rigid printing circuits or like structures coupling with the edge of the rigid printed circuits or like structures
    • H01R12/721—Coupling devices for rigid printing circuits or like structures coupling with the edge of the rigid printed circuits or like structures cooperating directly with the edge of the rigid printed circuits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/10—Light-emitting diodes [LED]
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • G02F1/133612—Electrical details

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

Abstract

The present invention relates to a backlight unit having a serial connection structure using a flexible flat cable. In the backlight unit with an inverter substrate and a plurality of lamps, the inverter substrate and the lamps are connected to each other through the flexible flat cable; the lamps are connected to each other in series; and resistance values for power applied to the respective lamps are equal to each other. Therefore, the backlight unit can solve the technical problem, such as the unstable illumination and non-uniform brightness of a display unit, which has occurred when the lamps are connected to each other in parallel in the prior art, and can ensure the stable illumination and uniform brightness of the display unit.

Description

연성평면케이블을 이용한 직렬연결구조를 갖는 백라이트유닛{Back light unit having consistution of connection series structure using flexible flat cable}BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a backlight unit having a series connection structure using a flexible flat cable,

본 발명은 백라이트유닛에 관한 것으로, 보다 상세하게는 모니터 또는 TV 등의 액정표시장치에 내장된 백라이트유닛의 램프들이 상호 연성평면케이블을 이용하여 직렬로 연결되도록 한 연성평면케이블을 이용한 직렬연결구조를 갖는 백라이트유닛에 관한 것이다.
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a backlight unit, and more particularly, to a backlight unit having a serial connection structure using a flexible flat cable in which lamps of a backlight unit built in a liquid crystal display device such as a monitor or a TV are connected in series using a flexible flat cable To a backlight unit.

최근에는 대표적인 CRT방식의 디스플레이 장치에 비하여 경량, 소형이면서 풀-컬러 및 고해상도 구현등과 같은 기능을 갖는 액정표시장치의 개발이 이루어졌다. 그 결과, 액정표시장치는 대표적인 정보처리장치인 모니터, 가정용 벽결이 TV, 및 기타 정보처리장치의 디스플레이 장치로서 널리 사용되고 있다. 이 액정표시장치는 액정의 특정한 분자배열에 전압을 인가하여 다른 분자배열로 변환시키고, 이러한 분자 배열에 의해 발광하는 액정셀의 복굴절성, 2색성 및 광산란 특성등의 광학적 성질의 변화를 시각변화로 변환하는 것으로, 액정셀에 의한 빛의 변조를 이용한 디스플레이이다. In recent years, a liquid crystal display device having functions such as light weight, small size, full-color and high resolution has been developed as compared with a typical CRT type display device. As a result, liquid crystal displays are widely used as monitors for typical information processing apparatuses, home screens for TVs, and other information processing apparatuses. This liquid crystal display device changes the optical properties such as birefringence, dichroism and light scattering characteristics of a liquid crystal cell which emits light by a molecular arrangement by applying a voltage to a specific molecular arrangement of the liquid crystal to change into another molecular arrangement, And is a display using modulation of light by a liquid crystal cell.

액정표시장치는 크게 TN(Twisted Nematic)방식과 STN(Super-Twisted Nematic)방식으로 나뉘고, 구동방식의 차이로는 스위칭 소자 및 TN액정을 이용한 액티브 매트릭스(active matrix)표시방식과, STN 액정을 이용한 패시브 매트릭스(passive matrix)표시방식이 있다. 여기서, 액티브 매트릭스 표시방식은 TFT-LDC에 사용되고, TFT를 스위치로 이용하여 LDC를 구동하는 방식이다. 또한, 패시브 매트릭스 표시방식은 트랜지스터를 사용하지 않기 때문에 이와 관련한 복잡한 회로를 필요로 하지 않는다. 또한, 광원의 이용방법에 따라 백라이트를 이용하는 투과형 액정표시장치와 외부의 광원을 이용하는 반사형 액정표시장치의 두 종류로 분류할 수 있다. The liquid crystal display device is largely classified into a TN (Twisted Nematic) method and a STN (super-twisted nematic) method. The driving method differs from the active matrix display method using a switching element and TN liquid crystal, There is a passive matrix display scheme. Here, the active matrix display system is used for the TFT-LDC, and the LDC is driven using the TFT as a switch. In addition, since the passive matrix display system does not use a transistor, it does not require a complicated circuit related thereto. In addition, according to a method of using a light source, it can be classified into two types, a transmissive liquid crystal display device using a backlight and a reflective liquid crystal display device using an external light source.

백라이트를 광원으로 사용하는 투과형 액정표시소자에서는 백라이트에 의해 액정표시소자의 무게와 부피를 증가시키지만, 외부의 광원을 이용하지 않고 독립적으로 디스플레이 기능을 갖기 때문에 널리 사용되고 있다. 이러한 백라이트를 포함하는 백라이트 유닛은 직하형 백라이트 유닛(직하방식)과 엣지형 백라이트 유닛(사이드 뷰 방식)으로 나뉜다. 엣지형은 바(bar)형태의 광원이 액정패널의 측면에 위치하여 도광판(light guide plate)을 통해 액정패널 쪽으로 빛을 조사하고, 직하형은 액정패널 밑에 위치한 면광원으로부터 액정패널을 직접 조광하도록 이루어진다. In a transmissive liquid crystal display device using a backlight as a light source, the weight and volume of a liquid crystal display device are increased by a backlight, but it is widely used because it has a display function independently without using an external light source. The backlight unit including such a backlight is divided into a direct-type backlight unit (direct-down type) and an edge-type backlight unit (side view type). In the edge type, a light source in the form of a bar is disposed on a side surface of a liquid crystal panel to irradiate light toward a liquid crystal panel through a light guide plate, and a direct type illuminates a liquid crystal panel directly from a surface light source positioned under the liquid crystal panel. .

이러한 엣지형 백라이트 유닛을 이용한 종래의 액정표시장치는 대한민국 등록특허 제0759362호(발명의 명칭:백라이트 어셈블리 및 이를 갖는 액정표시장치)에 개시되어 있다. 이를 간략히 살펴보면, 도 1a 및 도 1b에 도시된 바와 같이, 액정표시장치는 액정표시모듈(10)과, 액정표시모듈을 수납하기 위한 프론트 케이스(21)와 리어 케이스(22)를 포함하는 케이스(20) 및, 액정표시모듈(10)의 디스플레이유닛(11)에 균일한 광을 제공하기 위해 액정표시모듈(10)의 일측에 구비된 백라이트 어셈블리를 포함한다. 이 백라이트 어셈블리는 램프부(30,도 2a 참조)를 포함하고, 이 램프부(30)는 총 제1램프(31), 제2램프(32), 제3램프(33) 및 제4램프(34)를 구비하며, 각각 2개씩의 램프가 양측부에 배치되어 이루어졌다. 또한, 도 2a 내지 도 3에서와 같이, 제1,2,3,4램프(31,32,33,34)는 와이어(40), 암커넥터(51) 및 수커넥터(52)를 통해 인버터기판(50)에 전기적으로 연결되어 있다. 이때 사용하는 와이어(40)는 도 2b 및 도 3에 도시되어 있다. 이 와이어(40)를 통해 제1,2,3,4램프(31,32,33,34)는 상호 병렬로 연결되어 있다. 미설명부호 50은 도광판으로, 램프부(30)에서 발생된 광을 디스플레이유닛(11) 측으로 안내하면서 광의 경로를 변경하는 부재이다. A conventional liquid crystal display device using such an edge type backlight unit is disclosed in Korean Patent Registration No. 0759362 (the name of the invention: a backlight assembly and a liquid crystal display device having the same). 1A and 1B, a liquid crystal display device includes a liquid crystal display module 10, a case 21 including a front case 21 for housing the liquid crystal display module and a rear case 22 And a backlight assembly provided on one side of the liquid crystal display module 10 to provide uniform light to the display unit 11 of the liquid crystal display module 10. [ This backlight assembly includes a lamp unit 30 (see FIG. 2A), which includes a first lamp 31, a second lamp 32, a third lamp 33, 34, each of which has two lamps arranged on both sides thereof. 2A to 3, the first, second, third, and fourth lamps 31, 32, 33, and 34 are connected to the inverter board 40 through the wire 40, the female connector 51, (Not shown). The wire 40 to be used at this time is shown in Fig. 2B and Fig. The first, second, third, and fourth lamps 31, 32, 33, and 34 are connected in parallel through the wire 40. Reference numeral 50 denotes a light guide plate, which is a member for changing the light path while guiding the light generated in the lamp unit 30 to the display unit 11 side.

하지만, 이러한 와이어(40)는 액정표시장치의 조립과정에서 2개의 선을 수커넥터(52)에 하나씩 끼우고, 그 끼워진 선을 이웃한 다른 수커넥터(52)에 정확히 끼워야 하는 등의 작업에 불편함이 많았다. 또한, 제1,2,3,4램프(31,32,33,34)들이 상호 병렬로 연결되어 있어 각각의 와이어(40)를 통해 제1,2,3,4램프(31,32,33,34)와 전기적으로 연결된 상태에서의 저항값(R1>R2>R3>R4)이 전원공급부(미도시)와의 거리에 따라 그 차이가 다르게 나타나고, 이로 인해 디스플레이유닛(11)에서는 그 위치에 따라 조도가 달라져 밝기가 불균일하다는 문제점이 있었다.
However, such a wire 40 is inconvenient for an operation of inserting two wires into the male connector 52 one by one in the assembling process of the liquid crystal display device and fitting the inserted wire into another neighboring male connector 52 precisely There were many. The first, second, third, and fourth lamps 31, 32, 33, and 34 are connected in parallel to each other, (R1, R2, R3, and R4) in a state of being electrically connected to the power supply unit (not shown) are different depending on the distance from the power supply unit (not shown) There is a problem that the illuminance is changed and the brightness is uneven.

KR0759362 10KR0759362 10

상기 문제점을 해소하기 위해 안출된 본 발명은, 연성평면케이블을 이용하여 램프들을 상호 직렬로 연결하면서 램프들 간의 저항값을 동일하게 함으로써, 디스플레이유닛에서 위치와 무관하게 항상 일정한 조도를 유지하여 밝기가 균일하게 제공하도록 된 연성평면케이블을 이용한 직렬연결구조를 갖는 백라이트유닛을 제공함에 그 목적이 있다.
In order to solve the above-described problems, the present invention, which is devised to solve the above problems, has a structure in which lamps are connected in series by using a flexible flat cable and the resistance values of the lamps are the same, An object of the present invention is to provide a backlight unit having a serial connection structure using a flexible flat cable so as to be uniformly provided.

상기 목적을 달성하기 위해 본 발명에 따른 연성평면케이블을 이용한 직렬연결구조를 갖는 백라이트유닛은, 인버터기판 및 램프가 구비된 백라이트 유닛에 있어서, 인버터기판과 다수의 램프가 연성평면케이블로 연결되고, 다수의 램프는 상호 직렬로 연결되도록 이루어지고, 각각의 램프들에 인가되는 전원에 대한 저항값은 동일한 것을 특징으로 한다. According to an aspect of the present invention, there is provided a backlight unit having a serial connection structure using a flexible flat cable, the backlight unit including an inverter substrate and a lamp, wherein the inverter substrate and a plurality of lamps are connected by a flexible flat cable, The plurality of lamps are connected to each other in series, and the resistance value to the power source applied to each of the lamps is the same.

또한, 연성평면케이블은 폭에 대해 일부분이 길이방향으로 절개되어 타부위와 분리되고, 각각의 램프와 접속하기 적당한 위치에서 일정각도로 구부려져 각각의 램프에 전기를 인가하도록 접속되는 것을 특징으로 한다. Further, the flexible flat cable is characterized in that a part of the flexible flat cable is cut in the longitudinal direction to be separated from the other parts, bent at a predetermined angle at a suitable position to connect with the respective lamps, and to apply electricity to the respective lamps .

또한, 연성평면케이블의 일단부에 접속된 연성평면케이블 수커넥터와, 인버터기판에 실장된 연성평면케이블 암커넥터를 더 포함하여 이루어진 것을 특징으로 한다. It is further characterized by further comprising a flexible flat cable male connector connected to one end of the flexible flat cable and a flexible flat cable female connector mounted on the inverter board.

그리고, 연성평면케이블 암커넥터와, 인버터기판에 배치된 변압기는 상호 간의 전기적 신호의 손실을 배제하기 위해 근접하여 설치된 것을 특징으로 한다.
Further, the flexible flat cable arm connector and the transformer disposed on the inverter board are provided in close proximity in order to eliminate the loss of electrical signals between each other.

상술한 바와 같이 본 발명에 따르면, 연성평면케이블의 일단부는 커넥터를 통해 인버터기판에 전기적으로 연결되고, 타단부는 각각의 램프에 접속하도록 일부위를 연결함으로써, 작업이 단순해지고, 편의성이 향상되는 효과가 있다. As described above, according to the present invention, one end of the flexible flat cable is electrically connected to the inverter board through the connector, and the other end is connected to a part of the lamp so as to be connected to the respective lamps, thereby simplifying the operation and improving convenience It is effective.

또한, 연성평면케이블을 이용하여 램프들이 상호 직렬로 연결하여 램프들의 저항값을 동일하게 함으로써, 종래의 병렬로 연결되어 램프들의 저항값이 상이하였을 때 발생했던 디스플레이유닛의 불안정한 조도 및 불균일한 밝기등의 기술적 문제를 해소하고, 안정적인 조도와 균일한 밝기를 보장할 수 있는 효과가 있다.
Also, using a flexible flat cable, the lamps are connected in series By making the resistance values of the lamps the same, it is possible to solve the technical problems such as unstable illuminance and uneven brightness of the display unit which are caused when the resistance values of the lamps are connected differently in the conventional parallel connection, and stable brightness and uniform brightness are ensured There is an effect that can be done.

본 명세서에서 첨부되는 다음의 도면들은 본 발명의 바람직한 실시예를 예시하는 것이며, 발명의 상세한 설명과 함께 본 발명의 기술사상을 더욱 이해시키는 역할을 하는 것이므로, 본 발명은 그러한 도면에 기재된 사항에만 한정되어 해석되어서는 안된다.
도 1a는 종래의 액정표시장치가 개략적으로 도시된 분리 사시도이다.
도 1b는 도 1a에 도시된 백라이트 어셈블리가 개략적으로 도시된 측면도이다.
도 2a는 도 1a에 도시된 백라이트 어셈블리의 램프와 인버터가 와이어를 통해 전기적 연결된 상태가 개략적으로 도시된 구성도이다.
도 2b는 도 2a에 도시된 와이어와 인버터의 결합구조가 도시된 사시도이다.
도 3은 도 2b에 도시된 와이어가 도시된 평면도이다.
도 4는 본 발명에 따라 연성평면케이블을 이용한 직렬연결구조를 갖는 백라이트유닛에서 연성평면케이블과 인버터기판 및 램프와의 결합구조가 도시된 사시도이다.
도 5는 도 4에 도시된 연성평면케이블이 온전한 형태로 도시된 평면도이다. BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate preferred embodiments of the invention and, together with the description, serve to further the understanding of the technical idea of the invention, It should not be interpreted.
1A is an exploded perspective view schematically showing a conventional liquid crystal display.
FIG. 1B is a side view schematically illustrating the backlight assembly shown in FIG. 1A.
FIG. 2A is a schematic view illustrating a state in which a lamp and an inverter of the backlight assembly shown in FIG. 1A are electrically connected through a wire.
FIG. 2B is a perspective view showing a combined structure of the wire and the inverter shown in FIG. 2A.
3 is a plan view showing the wire shown in Fig. 2B.
4 is a perspective view showing a coupling structure of a flexible flat cable, an inverter substrate and a lamp in a backlight unit having a series connection structure using a flexible flat cable according to the present invention.
5 is a plan view of the flexible flat cable shown in FIG. 4 in an intact form.

이하에서는 첨부된 도면을 참조하여 본 발명이 속하는 기술분야에서 통상의 지식을 가진 자가 본 발명을 쉽게 실시할 수 있도록 바람직한 실시예를 상세하게 설명한다. 다만, 본 발명의 바람직한 실시예에 대한 동작 원리를 상세하게 설명함에 있어 관련된 공지 기능 또는 구성에 대한 구체적인 설명이 본 발명의 요지를 불필요하게 흐릴 수 있다고 판단되는 경우에는 그 상세한 설명을 생략한다.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the detailed description of known functions and configurations incorporated herein will be omitted when it may unnecessarily obscure the subject matter of the present invention.

<구성><Configuration>

도 4는 본 발명에 따라 연성평면케이블을 이용한 직렬연결구조를 갖는 백라이트유닛에서 연성평면케이블과 인버터기판 및 램프와의 결합구조가 도시된 사시도이고, 도 5는 도 4에 도시된 연성평면케이블이 온전한 형태로 도시된 평면도이다. 이하에서는 편의상 4개의 램프가 도시되었지만, 그 미만 또는 초과하는 수의 램프가 설치될 수 있고, 연성평면케이블 역시 램프의 수에 맞는 규격으로 설치된다. 4 is a perspective view showing a coupling structure of a flexible flat cable, an inverter board and a lamp in a backlight unit having a serial connection structure using a flexible flat cable according to the present invention, FIG. 5 is a cross- Is a plan view in an intact form. Hereinafter, four lamps are shown for the sake of convenience, but less than or greater than the number of lamps can be installed, and the flexible flat cable is also installed in a size suited to the number of lamps.

본 발명에 연성평면케이블을 이용한 직렬연결구조를 갖는 백라이트유닛은 도 4 및 도 5에 도시된 바와 같이, 인버터기판(100), 다수의 램프 및 연성평면케이블(110)을 포함하여 이루어진다. A backlight unit having a series connection structure using a flexible flat cable according to the present invention includes an inverter substrate 100, a plurality of lamps, and a flexible flat cable 110, as shown in FIGS.

인버터기판(100)은 전원공급부(미도시)에서 인가된 직류를 교류로 변환시키는 부재로서, 연성평면케이블 암커넥터(101,이하 '케이블 암커넥터'라 함) 및 변압기(102)를 구비한다. The inverter board 100 includes a flexible flat cable arm connector 101 (hereinafter referred to as a cable arm connector) and a transformer 102. The inverter 100 is a member for converting a direct current applied from a power supply unit (not shown) into an alternating current.

여기서, 변압기(102)는 인버터기판(100)에 실장(mounting)되어 전원공급부에서 공급된 전원을 요구되는 전압으로 변환한다. 이 변압기(102)는 케이블 암커넥터(101)와 신호선을 통해 연결되어 있고, 따라서 변압기(102)에서 변환된 전압은 케이블 암커넥터(101)로 공급된다. 이 케이블 암커넥터(101)와 변압기(102)는 상호 근접하게 배치되고, 이는 케이블 암커넥터(101)와 변압기(102)를 연결하는 신호선(미도시)의 거리를 짧게 함으로써, 신호선이 길어져 발생할 수 있는 손실을 방지할 수 있고, 신호선의 설계에도 유리하다. Here, the transformer 102 is mounted on the inverter substrate 100 and converts the power supplied from the power supply unit to a required voltage. The transformer 102 is connected to the cable arm connector 101 through a signal line, so that the voltage converted by the transformer 102 is supplied to the cable arm connector 101. This cable arm connector 101 and the transformer 102 are arranged close to each other and this can be caused by an increase in the length of the signal line by shortening the distance of the signal line (not shown) connecting the cable arm connector 101 and the transformer 102 And it is advantageous in designing a signal line.

그리고, 케이블 암커넥터(101)는 연성평면케이블(110,Flexible Flat Cable;FFC)의 일단부의 단자와 결합된 연성평면케이블 수커넥터(111,이하 '케이블 수커넥터'라 함)와 결합되는 부재이다. 이 케이블 암커넥터(101)와 케이블 수커넥터(111)가 접속하여 인버터기판(100)의 변압기(102)를 통해 인가된 전류가 연성평면케이블(110)을 통해 각각의 제1,2,3,4램프(120,121,122,123)에 제공된다. The cable arm connector 101 is a member coupled with a flexible flat cable male connector 111 (hereinafter referred to as a cable male connector) coupled with a terminal of one end of a flexible flat cable (FFC) 110 . The cable arm connector 101 and the cable male connector 111 are connected to each other so that the current applied through the transformer 102 of the inverter board 100 is transmitted through the flexible flat cable 110 to the first, 4 lamps 120, 121, 122,

램프는 다수로 이루어지고, 도면 상에서는 편의상 4개의 램프가 배치된 것으로 도시되었지만, 이 외의 개수로 8, 16개 등의 2n으로 배치될 수도 있다. 또한, 램프는 선광원인 외부전극 형광램프(EEFL) 또는 냉음극 형광램프(CCFL)가 사용될 수도 있고, 점광원인 엘이디(LED)가 사용될 수도 있다. 그리고, 램프는 전기적 연결을 위해 PCB기판(미도시) 상에 설치되고, 이 PCB기판에 연성평면케이블(110)의 일단부가 접속함으로써 램프에 전기가 인가된다. 이러한 구조로 배치된 램프들이 상호 직렬로 연결되고, 일예로 이러한 램프들 3개가 직렬 연결이 이루어지는 경우, 각각의 접속부위에서의 저항값은 아래 (식 1) 및 (식 2)와 같다. The lamps are made up of a plurality of lamps, and four lamps are shown as being arranged for convenience in the drawing. However, the number of lamps may be 2 n such as 8, 16, etc. Also, the lamp may be an external electrode fluorescent lamp (EEFL) or a cold cathode fluorescent lamp (CCFL), which is a light source, or an LED, which is a point light source, may be used. The lamp is installed on a PCB substrate (not shown) for electrical connection, and one end of the flexible flat cable 110 is connected to the PCB substrate so that electricity is applied to the lamp. When the lamps arranged in this structure are connected to each other in series, for example, when three such lamps are connected in series, the resistance values at the respective connection points are as shown in the following equations (1) and (2).

RT = δ(R1+R2+R3+R4) (식 1)R T =? (R 1 + R 2 + R 3 + R 4 )

R1 = R2 = R3 = R4 (식 2)R 1 = R 2 = R 3 = R 4 (Formula 2)

(여기서, RT 는 각 저항값의 총 합이고, R1, R2, R3, R4는 연성평면케이블과 제1,2,3,4램프 간에 발생하는 저항값이다.)(Where R T is the total sum of the respective resistance values and R 1 , R 2 , R 3 and R 4 are resistance values occurring between the flexible flat cable and the first , second , third and fourth lamps).

이와 같이, 연성평면케이블(110)을 통해 인버터기판(100)과 각각의 제1,2,3,4램프(120,121,122,123)가 직렬로 연결되면, 연성평면케이블(110)과 제1,2,3,4램프(120,121,122,123)의 접속부위에서 발생하는 저항값은 동일하게 발생한다. 따라서, 병렬로 연결된 종래의 경우에 발생할 수 있는 각각의 저항값이 달라 디스플레이유닛에서 그 위치에 따라 조도가 달라져 밝기가 불균일하였던 기술적 문제점을 해소하여 디스플레이유닛에서 위치와 무관하게 조도가 동일하고 밝기 역시 균일하게 형성되는 효과가 있다. When the inverter board 100 and each of the first, second, third, and fourth lamps 120, 121, 122, and 123 are connected in series through the flexible flat cable 110, , And 4 lamps (120, 121, 122, 123) are generated in the same manner. Therefore, the technical problem that the brightness is uneven due to the variation of the illuminance according to the position of the display unit due to the resistance value of each of which is caused in the conventional case connected in parallel can be solved and the illuminance is the same regardless of the position in the display unit, There is an effect of forming uniformly.

연성평면케이블(110)은 도 5에서 보는 바와 같이 통상의 것으로, 양단부위에는 단자가 형성된다. 이 연성평면케이블(110)은 램프의 개수, 즉 램프와의 접속부위에 알맞는 폭을 가진다. 일 예로, 연성평면케이블(110)은 4개의 제1,2,3,4램프(120,121,122,123)와 접속하기에 알맞은 폭으로 제조되고, 이외에도 4개 미만 또는 4개를 초과하여 램프와 접속하는 경우 역시 그 접속부위에 알맞는 폭으로 제조된다. 또한, 연성평면케이블(110)은 도 4에서와 같이, 일단부에 케이블 수커넥터(111)가 장착되고, 각각의 제1,2,3,4램프(120,121,122,123)가 장착된 PCB에 접속하기 위해 폭에 대해 일부분이 길이방향으로 절개되어 타부위와 분리되며, 각각의 제1,2,3,4램프(120,121,122,4)와 접속하기 적당한 위치에서 일정각도로 구부려 사용하게 된다.
The flexible flat cable 110 is conventional as shown in FIG. 5, and terminals are formed on both ends. This flexible flat cable 110 has a width suitable for the number of lamps, that is, the connection portion with the lamp. For example, the flexible flat cable 110 may be manufactured to a width suitable for connection with the four first, second, third, and fourth lamps 120, 121, 122, and 123, And is manufactured to have a width suitable for the connection portion. 4, the flexible flat cable 110 is provided with a cable male connector 111 at one end thereof and a cable connector 111 for connecting the first, second, third, and fourth lamps 120, 121, 122, A portion thereof is cut in the longitudinal direction to be separated from the other portion, and bent at an appropriate angle to be connected to each of the first, second, third, and fourth lamps 120, 121, 122, 4.

이상에서 설명한 바와 같이, 본 발명이 속하는 기술분야의 통상의 기술자는 본 발명이 그 기술적 사상이나 필수적 특징을 변경하지 않고서 다른 구체적인 형태로 실시될 수 있다는 것을 이해할 수 있을 것이다. 그러므로 상술한 실시예들은 모든 면에 예시적인 것이며 한정적인 것이 아닌 것으로서 이해해야만 한다. 본 발명의 범위는 상세한 설명보다는 후술하는 특허청구범위에 의하여 나타내어지며, 특허청구범위의 의미 및 범위 그리고 등가 개념으로부터 도출되는 모든 변경 또는 변형된 형태가 본 발명의 범위에 포함되는 것으로 해석되어야 한다.
As described above, those skilled in the art will appreciate that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. It is therefore to be understood that the above-described embodiments are to be considered in all respects as illustrative and not restrictive. The scope of the present invention is defined by the appended claims rather than the detailed description and all changes or modifications derived from the meaning and scope of the claims and their equivalents should be construed as being included within the scope of the present invention.

100:인버터기판
101:연성평면케이블 암커넥터
102:변압기
110:연성평면케이블
111:연성평면케이블 수커넥터
120:제1램프
121:제2램프
122:제3램프
123:제4램프.100: inverter substrate
101: Flexible flat cable female connector
102: Transformer
110: Flexible flat cable
111: Flexible flat cable number connector
120: first ramp
121: second lamp
122: third lamp
123: Fourth lamp.

Claims (4)

인버터기판(100) 및 램프가 구비된 백라이트 유닛에 있어서,
상기 인버터기판(100)과, PCB기판 상에 설치된 다수의 램프를 연결하는 연성평면케이블(110);
상기 연성평면케이블(110)의 일단부에 접속된 연성평면케이블 수커넥터(111);와
상기 인버터기판(100)에 실장된 연성평면케이블 암커넥터(101);를 포함하고,
상기 연성평면케이블(110)은 폭에 대해 일부분이 길이방향으로 절개되어 타부위와 분리되고, 각각의 일부분은 각각 램프와 접속할 수 있는 위치에서 일정각도로 구부려져 상기 각각의 램프에 전기를 인가하도록 접속되며,
상기 램프들은 각각 연성평면케이블(110)과 직렬로 연결되어 동일한 저항값을 가지고,
상기 연성평면케이블 암커넥터(101)와, 상기 인버터기판(100)에 배치된 변압기(102)는 상호 간의 전기적 신호의 손실을 배제하기 위해 근접하여 설치된 것을 특징으로하는 연성평면케이블을 이용한 직렬연결구조를 갖는 백라이트유닛. In a backlight unit provided with an inverter substrate (100) and a lamp,
A flexible flat cable 110 connecting the inverter board 100 and a plurality of lamps installed on the PCB board;
A flexible flat cable male connector 111 connected to one end of the flexible flat cable 110;
And a flexible flat cable arm connector (101) mounted on the inverter board (100)
The flexible flat cable 110 is bent at a predetermined angle in a position where the flexible flat cable 110 can be connected to the lamps so as to be electrically connected to the respective lamps Respectively,
The lamps are each connected in series with a flexible flat cable 110 and have the same resistance value,
Wherein the flexible flat cable arm connector (101) and the transformer (102) disposed on the inverter board (100) are disposed in proximity to each other to eliminate a loss of an electrical signal therebetween. . 삭제delete 삭제delete 삭제delete
KR20130094013A 2013-08-08 2013-08-08 Back light unit having consistution of connection series structure using flexible flat cable KR101490307B1 (en)

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