KR100342053B1 - Reflection type LCD - Google Patents
Reflection type LCD Download PDFInfo
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- KR100342053B1 KR100342053B1 KR1019990057429A KR19990057429A KR100342053B1 KR 100342053 B1 KR100342053 B1 KR 100342053B1 KR 1019990057429 A KR1019990057429 A KR 1019990057429A KR 19990057429 A KR19990057429 A KR 19990057429A KR 100342053 B1 KR100342053 B1 KR 100342053B1
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- reflective layer
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- 239000000758 substrate Substances 0.000 claims abstract description 27
- 239000004973 liquid crystal related substance Substances 0.000 claims abstract description 24
- 238000000034 method Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 6
- 239000000203 mixture Substances 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000012141 concentrate Substances 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 235000000396 iron Nutrition 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000059 patterning Methods 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
Classifications
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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
- G02F1/133553—Reflecting elements
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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
- G02F1/1337—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers
-
- 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
- G02F1/1343—Electrodes
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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)
- Spectroscopy & Molecular Physics (AREA)
- Liquid Crystal (AREA)
- Optical Elements Other Than Lenses (AREA)
Abstract
목적 : 유용한 사용자의 시야각을 확보하고 광 이용 효율을 향상시킬 수 있는 반사형 액정표시장치를 제공한다.PURPOSE: To provide a reflective liquid crystal display device that can secure a useful viewing angle of a user and improve light utilization efficiency.
구성 : 상부 기판(2)과 반사층(600)이 형성된 하부 기판(4)을 포함하되, 상기 반사층은 6각형 모양 및 그 중심에 형성되는 도트 모양의 요철로 형성하고, 상기 하부 기판과 상부 기판의 내측 대향면에는 적어도 전극(8)(8′) 및 배향층(12)(12′)을 적층하며, 이렇게 형성한 하부 기판과 상부 기판을 실링하고 그 사이공간에 액정(14)을 주입하여 밀봉한다. 반사층은 6각형 모양을 양각으로 나머지를 음각으로 형성하거나, 그 반대로 양각과 음각을 형성한다.Composition: The upper substrate 2 and the lower substrate including a reflective layer 600 is formed, wherein the reflective layer is formed of a hexagonal shape and dot-shaped irregularities formed in the center, and the lower substrate and the upper substrate At least electrodes 8 (8 ') and alignment layers 12 (12') are stacked on the inner facing surface, and the lower and upper substrates thus formed are sealed and liquid crystals 14 are injected into the spaces therebetween to seal them. do. The reflective layer is embossed with a hexagonal shape and engraved with the rest, or vice versa.
효과 : 반사층의 양각과 음각 부분을 혼용하되 다각형 모양을 취하여 밀집도를 높이고 광을 집속하므로, 유용한 시야각의 범위에서 광 반사율과 휘도를 향상시킬 수 있다.Effect: By mixing the positive and negative portions of the reflective layer, but taking a polygonal shape to increase the density and focus the light, it is possible to improve the light reflectance and brightness in the range of useful viewing angle.
Description
본 발명은 양호한 사용자의 시야각 범위로 반사광을 집중시켜 광 이용 효율을 향상시킬 수 있도록 한 반사형 액정표시장치에 관한 것이다.The present invention relates to a reflection type liquid crystal display device capable of concentrating reflected light in a good viewing angle range of a user to improve light utilization efficiency.
반사형 액정표시장치는 외부에서 입사한 광을 반사시켜 화상을 표시하는 것으로, 백라이트를 사용하지 않아 소비 전력이 작고, 박형 및 경화량에 유리한 이점이 있다.The reflection type liquid crystal display device displays an image by reflecting light incident from the outside. The reflection type liquid crystal display device does not use a backlight, and thus has low power consumption, and is advantageous in thinness and amount of curing.
이러한 반사형 액정표시장치의 일반적인 구성이 도 1에 잘 표시되어 있다.The general configuration of such a reflective liquid crystal display device is well shown in FIG.
도면에서 반사형 액정표시장치는 상호 대향되어서 일정한 간격으로 1쌍이 배치된 상·하부 기판(2)(4)을 포함하고, 하부 기판(4)의 상면에는 반사층(6)을 적층한다. 또 반사층(6)이 형성된 하부 기판(4)과 상부 기판(2)의 내측 대향면에는 각각 투명전극(8)(8′)과 절연층(10)(10′) 및 배향층(12)(12′)을 순차 적층 형성하고, 이렇게 형성된 양 기판(2)(4)을 도시하지 않은 실링수단으로 어셈블리하며, 그 사이공간에 액정(14)을 주입한 후 밀봉한다.In the drawing, the reflective liquid crystal display includes upper and lower substrates 2 and 4 arranged in pairs at regular intervals to face each other, and a reflective layer 6 is stacked on the upper surface of the lower substrate 4. In addition, transparent electrodes 8 (8 '), insulating layers (10) (10'), and alignment layers (12) are formed on the inner facing surfaces of the lower substrate (4) and the upper substrate (2) on which the reflective layer (6) is formed. 12 ') are sequentially laminated, and both substrates 2 and 4 thus formed are assembled by sealing means (not shown), and the liquid crystal 14 is injected into the space therebetween and then sealed.
상부 기판(2)의 외부 표면에는 입사 광을 제어하여 실제적으로 디스플레이 효과를 얻도록 하기 위해 편광판(16)을 부착하고, 특히 STN-LCD의 경우에는 상부 기판(2)의 상면 혹은 하면에 리타데이션 필름을 더 설치할 수 있다.On the outer surface of the upper substrate 2, a polarizing plate 16 is attached to control the incident light so as to actually obtain a display effect. In particular, in the case of STN-LCD, the upper surface or the lower surface of the upper substrate 2 is retarded. More films can be installed.
이렇게 형성된 반사형 액정표시장치는 인가 전압이 온 상태일 때 액정물질이 상천이(相 遷移)됨에 따라 입사된 외부 광을 축방향으로 투과시키고, 반사층(6)을 통하여 되반사시켜 전면으로 출사되게 하므로 화상을 표시한다.The reflective liquid crystal display device thus formed transmits external light incident in the axial direction as the liquid crystal material is phased when the applied voltage is on, and is reflected back through the reflective layer 6 to be emitted to the front surface. Therefore, an image is displayed.
그러나 종래의 반사형 액정표시장치는 TN, STN 방식에서 모두 편광판(16)에 의한 직선 편광으로 외부에서 입사된 자연광의 대략 50% 만을 표시에 사용하게 되므로 광 이용 효율이 저조한 문제점이 있다.However, in the conventional reflective liquid crystal display device, since only about 50% of the natural light incident from the outside by the linear polarization by the polarizer 16 is used for display in both the TN and STN methods, there is a problem of low light utilization efficiency.
이러한 문제점을 개선하기 위한 종래 예로서, 일본 특허공개 평4-243226호에는 반사판 자체가 광 확산 및 산란효과를 갖도록 하여 광 이용 효율을 향상시킨 반사형 액정표시장치가 소개되어있다. 여기에 소개된 반사형 액정표시장치는 도 2에 도시한 바와 같이, 기재(4)의 한쪽 면에 광 감광성수지를 도포하고, 포토마스크를 이용하여 패터닝함에 의해 동일 형상을 갖는 다수의 미세한 철(凸)(62)부를 형성하며, 상기 철부를 열처리하고 그 상부 전면에 반사막(64)을 적층한 반사판을 형성한다.As a conventional example for improving such a problem, Japanese Patent Laid-Open No. 4-243226 introduces a reflection type liquid crystal display device in which the reflector itself has light diffusion and scattering effects, thereby improving light utilization efficiency. As shown in FIG. 2, the reflective liquid crystal display device introduced here includes a plurality of fine irons having the same shape by applying a photosensitive resin to one surface of the substrate 4 and patterning the photosensitive resin. (Ii) a 62 part is formed, and a reflecting plate in which the convex portion is heat-treated and a reflective film 64 is laminated on the entire upper surface thereof is formed.
그러나 상기한 반사형 액정표시장치는 광 이용 효율을 다소 개선하고 있기는 하지만, 도 3에 도시한 바와 같이 광의 반사각도가 정면에 집중되므로 반사 강도가 큰 반면 사용자의 시야각이 좁아지는 문제점이 있다.However, although the reflection type liquid crystal display improves the light utilization efficiency somewhat, as shown in FIG. 3, the reflection angle of the light is concentrated on the front side, thereby increasing the reflection intensity and narrowing the viewing angle of the user.
또 미국 특허 4,106,859호에는 도 4에 도시한 바와 같이, 기재(4)의 한쪽 면에 오목한 버블 모양의 반사층(66)을 형성한 반사형 액정표시장치가 소개되어 있다. 그러나 상기한 구조는 도 5와 같이 광의 반사각이 커져 시야각이 넓어지는 이점이 있기는 하지만, 불필요한 시야각이 증대하고 실제적으로 사용자에게 유용한 시야각의 반사 강도가 약한 문제점이 있다.In addition, as shown in Fig. 4, US Patent No. 4,106,859 introduces a reflection type liquid crystal display device in which a concave bubble-shaped reflection layer 66 is formed on one surface of the substrate 4. However, the above-described structure has the advantage that the viewing angle is widened by increasing the reflection angle of light as shown in FIG. 5, but there is a problem that the unnecessary viewing angle is increased and the reflection intensity of the viewing angle which is useful to the user is weak.
앞서 설명한 종래 기술의 문제점을 해결하기 위한 것으로서, 본 발명은 사용자가 실제적으로 사용하는데 유용한 시야각의 범위로 반사광을 집중시켜, 광 이용 효율을 향상시키고 화면의 휘도를 향상시킬 수 있도록 함에 그 목적을 두고 있다.In order to solve the problems of the prior art described above, the present invention is to focus the reflected light in the range of the viewing angle useful for the user to actually use, to improve the light utilization efficiency and to improve the brightness of the screen have.
이를 위하여 본 발명에서는 상부 기판과 반사층이 형성된 하부 기판을 포함하되, 상기 반사층은 다각형 모양 및 그 중심에 형성되는 도트 모양의 요철로 형성하고, 상기 하부 기판과 상부 기판의 내측 대향면에는 적어도 전극 및 배향층을 적층하며, 이렇게 형성된 하부 기판과 상부 기판을 실링한 다음 그 사이공간에 액정을 주입하여 밀봉한 반사형 액정표시장치를 제안한다.To this end, the present invention includes an upper substrate and a lower substrate on which a reflective layer is formed, wherein the reflective layer is formed of a polygonal shape and dot-shaped irregularities formed at the center thereof, and at least an electrode and A reflective liquid crystal display device in which an alignment layer is stacked, a lower substrate and an upper substrate thus formed are sealed, and then liquid crystal is injected into a space therebetween.
여기서 반사층의 다각형 모양은 3 내지 10 각형 중에서 하나의 형태로 형성할 수 있으며, 상기 다각형 모양을 양각으로 나머지를 음각으로 형성하거나, 그 반대의 형태로 양각과 음각을 형성할 수 있다.In this case, the polygonal shape of the reflective layer may be formed in one of three to ten hexagons, and the polygonal shape may be embossed with the remainder as intaglio, or the embossed and intaglio may be formed in the opposite form.
도 1은 일반적인 반사형 액정표시장치를 도시한 단면도.1 is a cross-sectional view showing a typical reflective liquid crystal display device.
도 2 및 도 4는 종래 공지된 반사층 구조를 도시한 단면도.2 and 4 are cross-sectional views showing a conventionally known reflective layer structure.
도 3 및 도 5는 종래 공지된 반사층 구조의 분포도.3 and 5 are distribution diagrams of a conventionally known reflective layer structure.
도 6은 본 발명에 의한 반사층 구조를 도시한 일부 절개 사시도.Figure 6 is a partially cut perspective view showing a reflective layer structure according to the present invention.
도 7은 본 발명에 의한 반사층 구조의 단면도.7 is a sectional view of a reflective layer structure according to the present invention;
도 8은 본 발명에 의한 반사광 분포도.8 is a reflected light distribution diagram according to the present invention.
* 도면의 주요 부분에 대한 부호의 설명 *Explanation of symbols on the main parts of the drawings
4-하부 기판 600-반사층4-lower substrate 600-reflective layer
602-다각형부 604-도트부602-Polygon 604-Dot
이하, 본 발명의 바람직한 실시예를 첨부 도면에 의거하여 설명한다. 참고로 본 발명의 구성을 설명함에 있어서 종래 기술에서 인용한 부분에 대하여는 동일 부호를 부여하기로 한다.EMBODIMENT OF THE INVENTION Hereinafter, preferred embodiment of this invention is described based on an accompanying drawing. For reference, in describing the configuration of the present invention, the same reference numerals will be given to the parts cited in the related art.
도 1에서 설명한 바와 같이 본 발명의 반사형 액정표시장치는 상부 기판(2)과 반사층이 형성된 하부 기판(4)의 내측 대향면에 투명 전극(8)(8′), 절연층(10)(10′) 및 배향층(12)(12′)을 순차 적층하고, 이렇게 형성된 상·하부 기판을 실링한 다음 그 사이공간에 액정(14)을 주입하여 밀봉한 구성을 포함한다.As described with reference to FIG. 1, the reflective LCD according to the present invention has a transparent electrode 8 (8 ′) and an insulating layer 10 () formed on an inner side surface of the lower substrate 4 on which the upper substrate 2 and the reflective layer are formed. 10 ') and the alignment layers 12 (12') are sequentially laminated, and the upper and lower substrates thus formed are sealed, and then liquid crystals 14 are injected into the space therebetween to seal the composition.
여기서 본 발명은 유효 시야각 안으로 반사광을 집중시키고 광 이용 효율을 향상시키기 위하여 새로운 반사층(600) 구조를 제시한다.Herein, the present invention proposes a new reflective layer 600 structure in order to concentrate the reflected light into the effective viewing angle and improve the light utilization efficiency.
이러한 반사층(600) 구조는 도 6 및 도 7에 도시한 바와 같이, 자체가 광 확산 및 산란효과를 갖도록 하기 위해 요철을 형성하는 것이며, 특히 다각형 모양 및그 중심에 형성되는 도트 모양의 요철 구조를 갖는다.As shown in FIGS. 6 and 7, the reflective layer 600 has a concave-convex shape in order to have a light diffusing and scattering effect, and particularly has a polygonal shape and a dot-shaped concave-convex structure formed at the center thereof. .
반사층(600)의 다각형부(602)는 3 내지 10 각형 중에서 하나의 모양으로 할 수 있으며, 바람직하게는 도면에서와 같이 정6각형의 모양을 취하는 것이 좋다. 이러한 다각형부(602)는 인접하는 다각형부와 정확하게 맞추어지므로 밀집도를 높이는 효과가 있다.The polygonal portion 602 of the reflective layer 600 may have one of three to ten hexagons, and preferably, the polygonal portion 602 may have a regular hexagonal shape as shown in the drawing. Since the polygon part 602 is exactly matched with the adjacent polygon part, there is an effect of increasing the density.
또 반사층(600)의 다각형부(602) 중심에는 도트부(604)를 형성한다.Further, a dot portion 604 is formed at the center of the polygon portion 602 of the reflective layer 600.
이렇게 형성되는 본 발명의 반사층(600)은 종래 기술의 2가지 예를 혼용하는 구조이며, 다각형부(602)를 양각으로 나머지를 음각으로 형성하므로, 실제적으로 사용자의 유효한 시야각 범위로 반사광을 집중시켜 본 발명의 목적을 달성하고 있다.The reflective layer 600 of the present invention formed as described above is a structure in which two examples of the related art are mixed, and the polygonal portion 602 is embossed with the remainder being engraved, thereby concentrating the reflected light in the effective viewing angle range of the user. The object of the present invention has been achieved.
보다 구체적으로 본 발명의 반사층(600)은 양각과 음각 구조를 혼용하는 것이며, 전체적으로 평균 경사각이 10°이하가 되게 한다.More specifically, the reflective layer 600 of the present invention is a mixture of the embossed and intaglio structures, so that the average tilt angle is less than 10 ° as a whole.
이러한 본 발명의 반사층(600) 구조에 따라, 편광판과 상부 기판을 통해 입사한 자연광은 액정(14)의 스위칭 작용에 의해 선택적으로 반사되어 다시 전면으로 출사된다.According to the structure of the reflective layer 600 of the present invention, the natural light incident through the polarizing plate and the upper substrate is selectively reflected by the switching action of the liquid crystal 14 is emitted to the front again.
이때 반사광은 다각형부(602)인 양각에 의한 정반사와 나머지 부분인 음각에 의한 반사각을 적절히 혼용하므로 사용자의 유용한 시야각인 ±45°범위로 집중 반사되어진다.At this time, the reflected light is properly mixed with the specular reflection due to the embossment, which is the polygonal part 602, and the reflection angle due to the intaglio, which is the remaining part, so that the reflected light is concentrated and reflected in the range of ± 45 °, which is a useful viewing angle of the user.
따라서 본 발명에 의한 반사광은 도 8에 도시한 광 분포를 갖게 되며, 이것은 종래 기술에서 설명한 광 분포(도 3 및 도 5)의 장점을 취하는 구조이며, 결국실제 사용자의 유용한 시야각 범위에서 광 이용 효율을 높이게 된다.Therefore, the reflected light according to the present invention has the light distribution shown in FIG. 8, which is a structure that takes advantage of the light distribution (FIGS. 3 and 5) described in the prior art, and thus, the light utilization efficiency in a useful viewing angle range of a real user. Will increase.
한편 본 발명에 의한 반사층(600) 구조는 다각형부(602)를 음각으로 형성하고 나머지 부분을 양각으로 형성할 수 있는데, 이 경우에도 반사광의 분포는 앞서 설명한 것과 동일하다.Meanwhile, in the structure of the reflective layer 600 according to the present invention, the polygonal portion 602 may be formed in an intaglio and the remaining portions may be embossed. In this case, the distribution of the reflected light is the same as described above.
이상에서 설명한 구성 및 작용을 통하여 알 수 있듯이, 본 발명은 반사층의 양각과 음각 부분을 혼용하되 다각형 모양을 취하여 밀집도를 높이고 광을 집속하므로, 유용한 시야각의 범위에서 광 반사율을 향상시키는 효과를 얻을 수 있다.As can be seen through the configuration and operation described above, the present invention is to mix the positive and negative portions of the reflective layer, but take a polygonal shape to increase the density and focus the light, it is possible to obtain the effect of improving the light reflectance in the useful viewing angle range have.
따라서 본 발명에 의하면 반사형 액정표시장치의 휘도를 향상시킬 수 있다.Therefore, according to the present invention, the luminance of the reflective liquid crystal display device can be improved.
Claims (5)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019990057429A KR100342053B1 (en) | 1999-12-14 | 1999-12-14 | Reflection type LCD |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019990057429A KR100342053B1 (en) | 1999-12-14 | 1999-12-14 | Reflection type LCD |
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| Publication Number | Publication Date |
|---|---|
| KR20010056034A KR20010056034A (en) | 2001-07-04 |
| KR100342053B1 true KR100342053B1 (en) | 2002-06-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR1019990057429A KR100342053B1 (en) | 1999-12-14 | 1999-12-14 | Reflection type LCD |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1271187A3 (en) * | 2001-06-28 | 2004-09-22 | Alps Electric Co., Ltd. | Reflector and reflective liquid crystal display |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0667173A (en) * | 1992-08-19 | 1994-03-11 | Sharp Corp | Liquid crystal display device |
| JPH08106087A (en) * | 1994-10-05 | 1996-04-23 | Fuji Xerox Co Ltd | Reflection type liquid crystal display device |
| JPH1114983A (en) * | 1997-06-25 | 1999-01-22 | Sharp Corp | Liquid crystal display element |
-
1999
- 1999-12-14 KR KR1019990057429A patent/KR100342053B1/en not_active IP Right Cessation
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0667173A (en) * | 1992-08-19 | 1994-03-11 | Sharp Corp | Liquid crystal display device |
| JPH08106087A (en) * | 1994-10-05 | 1996-04-23 | Fuji Xerox Co Ltd | Reflection type liquid crystal display device |
| JPH1114983A (en) * | 1997-06-25 | 1999-01-22 | Sharp Corp | Liquid crystal display element |
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| KR20010056034A (en) | 2001-07-04 |
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