KR100503403B1 - LCD module without streaks - Google Patents
LCD module without streaks Download PDFInfo
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- KR100503403B1 KR100503403B1 KR1019980002904A KR19980002904A KR100503403B1 KR 100503403 B1 KR100503403 B1 KR 100503403B1 KR 1019980002904 A KR1019980002904 A KR 1019980002904A KR 19980002904 A KR19980002904 A KR 19980002904A KR 100503403 B1 KR100503403 B1 KR 100503403B1
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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
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- 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
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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
- G02F1/133308—Support structures for LCD panels, e.g. frames or bezels
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- Nonlinear Science (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
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- Crystallography & Structural Chemistry (AREA)
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Abstract
냉음극형광램프와 LCD 패널 사이 또는 인버터와 LCD 패널 사이 중 적어도 어느 하나에 도전성 차폐수단을 설치하고, 이 차폐수단에 인버터의 출력전압과 180°의 위상차를 갖는 전압을 인가하여 LCD 패널의 줄무늬 현상을 제거한 LCD 모듈이 개시된다.Conductive shielding means is provided between at least one of the cold cathode fluorescent lamp and the LCD panel, or between the inverter and the LCD panel, and a stripe phenomenon of the LCD panel is applied to the shielding means by applying a voltage having a phase difference of 180 ° with the output voltage of the inverter. The LCD module is removed.
Description
본 발명은 LCD 모듈에 관한 것으로, 더욱 상세하게는 램프와 LCD 패널 사이 또는 인버터와 LCD 패널 사이 중 적어도 어느 하나에 도전성 차폐수단을 설치하고, 이 차폐수단에 인버터의 출력전압과 180°의 위상차를 갖는 전압을 인가하여 LCD 패널의 줄무늬 현상을 제거한 LCD 모듈에 관한 것이다.The present invention relates to an LCD module, and more particularly, a conductive shielding means is provided between at least one of the lamp and the LCD panel or between the inverter and the LCD panel, and the shielding means is provided with a phase difference of 180 ° with the output voltage of the inverter. The present invention relates to an LCD module which removes streaks of an LCD panel by applying a voltage having the same.
일반적으로 LCD는 액체와 고체 중간상태의 물질인 액정이 전극으로 형성된 두 장의 유리기판 사이에 주입되어 전계를 가하여 숫자나 영상을 표시하는 기기로서, LCD 패널 배면에는 빛을 조사하는 백라이트 어셈블리가 장착된다.In general, an LCD is a device in which a liquid crystal, which is a liquid and a solid intermediate state, is injected between two glass substrates formed by electrodes to display an number or an image by applying an electric field. A backlight assembly is provided on the back of the LCD panel to irradiate light. .
백라이트 어셈블리는 크게 구분해서 직하방식과 에지(edge)방식으로 구분된다. 직하방식은 LCD 패널의 밑면에 광원을 두어, 패널 전면을 직접 조광하는 방식으로, 광원은 주로 일렉트로 루미네센스(EL)가 사용되며, 에지방식은 LCD 패널의 일측면 또는 양측면에 광원을 두어 도광판, 반사판에 광선을 반사 확산하는 방식으로, 광원으로는 냉음극관이나 열음극관 또는 형광등 등이 사용된다.The backlight assembly is largely divided into a direct type and an edge method. The direct method is to place the light source on the bottom of the LCD panel, and directly illuminate the front of the panel. The light source is mainly used for electro luminescence (EL), and the edge method is to place the light source on one or both sides of the LCD panel. A cold cathode tube, a hot cathode tube, a fluorescent lamp, or the like is used as the light source by reflecting and diffusing light rays onto the reflecting plate.
백라이트 어셈블리의 구조를 개략적으로 살펴보면, 표면을 확산 처리한 아크릴 수지가 사용된 도광판의 상면에는 빛을 균일하게 확산하는 확산시트가 장착되고, 도광판의 하면에는 빛을 반사하는 반사시트가 설치되며, 도광판의 일측에는 램프가 설치되고, 램프 및 램프에 연결된 와이어는 몰드 프레임에 수납된다. 또한, 램프의 양 단자는 각각 인버터의 출력측 핫(hot)전극 및 콜드(clod)전극에 전기적으로 연결된다.In the structure of the backlight assembly, a diffuser sheet for uniformly diffusing light is mounted on an upper surface of a light guide plate using an acrylic resin with a diffused surface, and a reflective sheet for reflecting light is installed on a lower surface of the light guide plate. One side of the lamp is installed, the lamp and the wire connected to the lamp is accommodated in the mold frame. In addition, both terminals of the lamp are electrically connected to a hot electrode and a cold electrode of the output side of the inverter, respectively.
이와 같이 구성된 백라이트 어셈블리의 작용을 설명하면 다음과 같다.The operation of the backlight assembly configured as described above is as follows.
인버터로부터 직류 배터리 전압이 고압의 교류전압으로 변환되어 램프에 인가되면, 램프에서 빛이 발산되고, 이 빛은 도광판 안에 도달하여 확산시트로 반사되거나, 반사시트에 의해 빛이 반사되어 확산시트로 방사되며, 확산시트에서는 도달된 빛을 균일하게 확산하여 전면으로 방사한다.When the DC battery voltage is converted from the inverter to a high-voltage alternating voltage and applied to the lamp, light is emitted from the lamp, which reaches the light guide plate and is reflected by the diffusion sheet, or is reflected by the reflection sheet and radiated to the diffusion sheet. In the diffusion sheet, the reached light is uniformly diffused and radiated to the front surface.
이때, 인버터로부터 출력되는 전압은 통상 주파수가 40∼80㎑, 전압이 600∼800의 고전압이며, 인버터 내부에 코일을 내장하고 있기 때문에 인버터 주위에 강한 전기장(electric field)이 형성된다. 또한 이 고전압이 걸리는 램프의 주위에도 강한 전기장이 형성된다. At this time, the voltage output from the inverter is usually a high voltage of 40 to 80 kHz and a voltage of 600 to 800. Since a coil is built in the inverter, a strong electric field is formed around the inverter. A strong electric field is also formed around the lamp under high voltage.
이러한 전기장은 LCD 패널을 구동하는 각종 파형과 간섭현상을 일으켜 노이즈가 발생하고, 또한 패널 내부의 픽셀들의 전이에 영향을 주어 디스플레이 상에 줄무늬 현상을 발생시키는 문제점이 있다. Such an electric field causes interference with various waveforms driving the LCD panel and generates noise, and also affects the transition of pixels inside the panel, causing streaks on the display.
이를 제거하기 위해서는 인버터 및 램프와 LCD 패널 사이에 충분한 거리를 확보하는 것이 최선의 방책이지만, 실질적으로 LCD 모듈자체가 경량박형화되어 가고 있는 실정에서 일정거리 이상을 확보하는 것은 곤란하다.In order to eliminate this, it is best to secure a sufficient distance between the inverter and the lamp and the LCD panel, but it is difficult to secure a certain distance or more in the situation where the LCD module itself is becoming thin and thin.
이에 본 발명의 기술적 과제는 이러한 종래의 문제점을 해결하기 위한 것으로, 본 발명의 목적은 인버터로부터 출력되는 고전압이나 냉음극형광램프에 걸리는 고전압에 의해 발생되는 전기장에 의해 LCD 패널에 줄무늬가 발생하는 것을 제거하기 위한 LCD 모듈을 제공하는 것이다. Accordingly, the technical problem of the present invention is to solve such a conventional problem, and an object of the present invention is that streaks occur in the LCD panel due to an electric field generated by a high voltage output from an inverter or a high voltage applied to a cold cathode fluorescent lamp. It is to provide an LCD module for removal.
상기한 본 발명의 목적을 실현하기 위하여 일실시예로 따른 줄무늬 현상을 제거한 LCD 모듈은, 냉음극형광램프와, 상기 냉음극형광램프에서 제공된 광의 경로를 가이드하는 도광판과, 상기 냉음극형광램프 및 도광판을 수납하는 수납용기를 갖는 백라이트 어셈블리; 상기 냉음극형광램프에 제1 교류전압을 공급하는 인버터; 상기 제1 교류전압을 제공받아 상기 제1 교류전압과 180도의 위상차를 갖는 제2 교류전압을 출력하는 상전이 회로; 상기 백라이트 어셈블리에서 제공되는 광을 이용하여 화상을 표시하는 LCD 패널; 및 상기 인버터와 상기 LCD 패널 사이에 개재되고, 상기 제2 교류전압을 제공받아 상기 인버터에서 발생된 전자파를 상쇄시켜 상기 LCD 패널에 유입되는 것을 차단하는 제1 차폐부를 포함한다. In order to achieve the above object of the present invention, an LCD module having a stripe phenomenon according to an embodiment includes a cold cathode fluorescent lamp, a light guide plate for guiding a path of light provided by the cold cathode fluorescent lamp, the cold cathode fluorescent lamp, A backlight assembly having a housing for accommodating the light guide plate; An inverter for supplying a first AC voltage to the cold cathode fluorescent lamp; A phase transition circuit receiving the first AC voltage and outputting a second AC voltage having a phase difference of 180 degrees with the first AC voltage; An LCD panel displaying an image using light provided from the backlight assembly; And a first shielding part interposed between the inverter and the LCD panel and receiving the second AC voltage to cancel electromagnetic waves generated by the inverter to block the inflow into the LCD panel.
상기한 본 발명의 목적을 실현하기 위하여 다른 실시예에 따른 줄무늬 현상을 제거한 LCD 모듈은, 냉음극형광램프와, 상기 냉음극형광램프에서 제공된 광의 경로를 가이드하는 도광판과, 상기 냉음극형광램프 및 도광판을 수납하는 수납용기를 갖는 백라이트 어셈블리; 상기 냉음극형광램프에 제1 교류전압을 공급하는 인버터; 상기 제1 교류전압을 제공받아 상기 제1 교류전압과 180도의 위상차를 갖는 제2 교류전압을 출력하는 상전이 회로; 상기 백라이트 어셈블리애서 제공되는 광을 이용하여 화상을 표시하는 LCD 패널; 및 상기 냉음극형광램프와 상기 LCD 패널 사이에 개재되고, 상기 제2 교류전압을 제공받아 상기 냉음극형광램프에서 발생된 전자파를 상쇄시켜 상기 LCD 패널에 유입되는 것을 차단하는 차폐부를 포함한다. According to another aspect of the present invention, there is provided a LCD module including a stripe phenomenon, which includes a cold cathode fluorescent lamp, a light guide plate for guiding a path of light provided by the cold cathode fluorescent lamp, and a cold cathode fluorescent lamp. A backlight assembly having a housing for accommodating the light guide plate; An inverter for supplying a first AC voltage to the cold cathode fluorescent lamp; A phase transition circuit receiving the first AC voltage and outputting a second AC voltage having a phase difference of 180 degrees with the first AC voltage; An LCD panel displaying an image using light provided from the backlight assembly; And a shielding part interposed between the cold cathode fluorescent lamp and the LCD panel and receiving the second AC voltage to cancel electromagnetic waves generated by the cold cathode fluorescent lamp to block the inflow into the LCD panel.
이하 본 발명의 일실시예에 따른 줄무늬 현상을 제거한 LCD 모듈을 도 1을 참조하여 상세히 설명하기로 한다. Hereinafter, an LCD module from which streaks are removed according to an embodiment of the present invention will be described in detail with reference to FIG. 1.
도 1을 참조하면, 냉음극형광램프(10)의 양 단자는 각각 인버터(15)의 콜드(cold)전극(12)과 핫(hot)전극(14)에 전기적으로 연결된다. Referring to FIG. 1, both terminals of the cold cathode fluorescent lamp 10 are electrically connected to the cold electrode 12 and the hot electrode 14 of the inverter 15, respectively.
인버터(15)와 LCD 패널(1) 사이에는 도전성 차폐막(30)이 설치된다. 차폐막(30)에는 인버터(15)로부터 출력되는 교류전압과 180도의 위상차를 갖는 전압이 공급된다. 일 실시예에 따르면, 인버터(15)의 출력단에 연결된 상전이(phase shift) 회로(20)로부터 180도의 위상차를 갖는 전압이 도전성 차폐막(30)에 공급된다.A conductive shielding film 30 is provided between the inverter 15 and the LCD panel 1. The shielding film 30 is supplied with a voltage having a phase difference of 180 degrees with an AC voltage output from the inverter 15. According to one embodiment, a voltage having a phase difference of 180 degrees is supplied to the conductive shielding film 30 from the phase shift circuit 20 connected to the output terminal of the inverter 15.
도 3은 상전이 회로(20)의 일예를 도시한 회로도로서, 인버터 출력전압 Vin이 입력되면, 전압 Vin과 180도의 위상차를 갖는 상전이 전압 Vout이 출력된다. 이때, 입출력전압비는 가변저항 R을 조정하여 제어할 수 있다. 3 is a circuit diagram showing an example of the phase transition circuit 20. When the inverter output voltage Vin is input, the phase transition voltage Vout having a phase difference of 180 degrees with the voltage Vin is output. At this time, the input-output voltage ratio can be controlled by adjusting the variable resistor R.
한편, 상전이 회로(20)로는 입력전압과 출력전압의 위상차가 180도인 일반적인 상전이 회로가 사용되어도 무방하다.As the phase transition circuit 20, a general phase transition circuit having a phase difference of 180 degrees between an input voltage and an output voltage may be used.
또한, 이 실시예에서는 상전이 회로(20)가 인버터(15)의 출력단에 연결되는 것을 예로 들었지만, 후술하는 바와 같이, 도전성 차폐막(30)이 냉음극형광램프(10)와 LCD 패널(1) 사이에 설치되는 경우에는 냉음극형광램프(10)의 양단에 연결되는 것도 가능하다.In this embodiment, the phase transition circuit 20 is connected to the output terminal of the inverter 15 as an example. However, as will be described later, the conductive shielding film 30 is formed between the cold cathode fluorescent lamp 10 and the LCD panel 1. If installed in the cold cathode fluorescent lamp 10 may be connected to both ends.
한편, 다른 실시예로, 상기한 바와 같이, 냉음극형광램프(10)와 LCD 패널(1) 사이에 도전성 차폐막(30)이 설치될 수 있다. 이 실시예에 있어서는 바람직하게 도전성 차폐막(30)은 투명한 물질로 이루어지며, 더욱 바람직하게 ITO(Indium Thin Oxide)로 이루어질 수 있다. 이에 따라 냉음극형광램프(10)로부터 발산되는 빛의 경로를 차단하지 않게 된다. Meanwhile, in another embodiment, as described above, the conductive shielding film 30 may be provided between the cold cathode fluorescent lamp 10 and the LCD panel 1. In this embodiment, the conductive shielding film 30 is preferably made of a transparent material, more preferably may be made of indium thin oxide (ITO). Accordingly, the path of the light emitted from the cold cathode fluorescent lamp 10 is not blocked.
이하, 이와 같은 구조의 본 발명에 따른 LCD 모듈에 있어 도전성 차폐막의 역할을 구체적으로 설명한다.Hereinafter, the role of the conductive shielding film in the LCD module according to the present invention having such a structure will be described in detail.
인버터(15)로부터 출력된 고전압이 냉음극형광램프(10)에 인가되면, 냉음극형광램프(10)에서 빛이 발산되고, 이 빛은 도광판을 거쳐 직접 확산시트로 반사되거나, 반사시트에 의해 반사되어 확산시트로 방사되며, 확산시트에서는 도달된 빛을 균일하게 확산하여 LCD 패널(1)로 방사한다. When the high voltage output from the inverter 15 is applied to the cold cathode fluorescent lamp 10, light is emitted from the cold cathode fluorescent lamp 10, and the light is directly reflected through the light guide plate to the diffusion sheet or by the reflective sheet. The light is reflected and emitted to the diffusion sheet, and the diffusion sheet uniformly diffuses the emitted light and radiates it to the LCD panel 1.
이때, 인버터(15)에서 발생되는 강한 전기장과 도전성 차폐막(30)에 공급된 180도 상전이된 전압에 의해 발생되는 전기장에 의해 상쇄되어 LCD 패널(1)에 영향을 끼치지 못하게 한다. 이에 따라, 강한 전기장에 의해 LCD 패널(1)에 줄무늬가 생기는 것을 근본적으로 막을 수 있다. At this time, the electric field generated by the strong electric field generated by the inverter 15 and the electric field generated by the 180 degree phase shifted voltage supplied to the conductive shielding film 30 is prevented from affecting the LCD panel 1. Accordingly, it is possible to fundamentally prevent streaks on the LCD panel 1 due to the strong electric field.
이때, 도전성 차폐막(30)에 공급된 180도 상전이된 전압에 의해 발생되는 전기장의 크기는 도 2에 도시된 상전이 회로(20)를 예로 든다면, 가변저항 R을 조정하여 출력전압 Vout의 크기를 조정함으로서 제어할 수 있고, 이에 따라 인버터(15)에서 발생되는 전기장의 크기와 같도록 할 수 있다. At this time, the magnitude of the electric field generated by the 180-degree phase-transformed voltage supplied to the conductive shielding film 30 is an example of the phase-transition circuit 20 shown in FIG. 2, by adjusting the variable resistor R to adjust the magnitude of the output voltage Vout. By adjusting, it can control, and can make it the same as the magnitude | size of the electric field which the inverter 15 generate | occur | produces.
한편, 냉음극형광램프(10)에 걸리는 고전압에 의해 발생되는 전기장은 냉음극형광램프(10)와 LCD 패널(1) 사이에 설치되고 도전성 차폐막(30)에 180도 상전이된 전압을 공급하여 발생되는 전기장으로 상쇄할 수 있다. On the other hand, the electric field generated by the high voltage applied to the cold cathode fluorescent lamp 10 is installed between the cold cathode fluorescent lamp 10 and the LCD panel 1 and is supplied by supplying a 180 degree phase shifted voltage to the conductive shielding film 30. Can be offset by an electric field.
상기한 바와 같이, 본 발명에 따르면 냉음극형광램프와 LCD 패널 사이 또는 인버터와 LCD 패널 사이 중 적어도 어느 한 곳에 도전성 차폐막을 설치하고, 차폐막에 인버터의 출력전압과 180°의 위상차를 갖는 전압을 인가함으로서 인버터와 냉음극형광램프로부터 발생하는 전기장을 상쇄시켜 LCD 패널에 줄무늬가 생기는 것을 방지할 수 있다. 또한, 이에 따라 LCD 패널의 표시품위를 향상시킬 수 있는 이점이 있다. As described above, according to the present invention, a conductive shielding film is provided between at least one of the cold cathode fluorescent lamp and the LCD panel or between the inverter and the LCD panel, and a voltage having a phase difference of 180 ° with the output voltage of the inverter is applied to the shielding film. By canceling the electric field generated from the inverter and the cold cathode fluorescent lamp to prevent streaks on the LCD panel. In addition, there is an advantage that can improve the display quality of the LCD panel.
본 발명에서는 도전성 차폐막을 예로 들어 설명하고 있으나, 반드시 막의 형상을 가질 필요는 없으며 봉형상이나 플레이트 향상을 가질 수도 있다. 또한 설치위치가 정확히 인버터와 LCD 패널 사이일 필요는 없다.In the present invention, the conductive shielding film is described as an example, but it is not necessary to have the shape of the film and may have a rod shape or a plate improvement. Also, the installation location does not have to be exactly between the inverter and the LCD panel.
도 1은 본 발명의 개념을 설명하기 위한 개념도이고,1 is a conceptual diagram illustrating the concept of the present invention,
도 2는 도 1의 상전이 회로의 상세 회로도이다.FIG. 2 is a detailed circuit diagram of the phase transition circuit of FIG. 1.
<도면의 주요부분에 대한 부호의 설명><Description of the symbols for the main parts of the drawings>
10 : 냉음극형광램프 12 : 콜드(cold)전극10 cold cathode fluorescent lamp 12 cold electrode
14 : 핫(hot)전극 15 : 인버터14 hot electrode 15 inverter
20 : 180도 상전이 회로 30 : 차폐막20: 180 degree phase transition circuit 30: shielding film
Claims (7)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019980002904A KR100503403B1 (en) | 1998-02-03 | 1998-02-03 | LCD module without streaks |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019980002904A KR100503403B1 (en) | 1998-02-03 | 1998-02-03 | LCD module without streaks |
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| Publication Number | Publication Date |
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| KR19990068956A KR19990068956A (en) | 1999-09-06 |
| KR100503403B1 true KR100503403B1 (en) | 2005-10-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| KR1019980002904A Expired - Fee Related KR100503403B1 (en) | 1998-02-03 | 1998-02-03 | LCD module without streaks |
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| KR100507728B1 (en) * | 2002-07-18 | 2005-08-10 | 주식회사 우영 | Lighting apparatus for flat display panel |
| DE102006058573B4 (en) * | 2006-06-21 | 2009-08-27 | Lg Display Co., Ltd. | Liquid crystal display device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0291615A (en) * | 1988-09-28 | 1990-03-30 | Seiko Epson Corp | liquid crystal display device |
| JPH05264991A (en) * | 1992-01-09 | 1993-10-15 | Nec Corp | Back light and liquid crystal display device |
| JPH0745103A (en) * | 1993-07-30 | 1995-02-14 | Toshiba Lighting & Technol Corp | Lighting device, backlight and liquid crystal display device |
| JPH07209645A (en) * | 1994-01-14 | 1995-08-11 | Matsushita Electric Ind Co Ltd | Liquid crystal display |
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1998
- 1998-02-03 KR KR1019980002904A patent/KR100503403B1/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0291615A (en) * | 1988-09-28 | 1990-03-30 | Seiko Epson Corp | liquid crystal display device |
| JPH05264991A (en) * | 1992-01-09 | 1993-10-15 | Nec Corp | Back light and liquid crystal display device |
| JPH0745103A (en) * | 1993-07-30 | 1995-02-14 | Toshiba Lighting & Technol Corp | Lighting device, backlight and liquid crystal display device |
| JPH07209645A (en) * | 1994-01-14 | 1995-08-11 | Matsushita Electric Ind Co Ltd | Liquid crystal display |
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