KR920003153B1 - Method of negative type lcd performing black mask layer - Google Patents

Method of negative type lcd performing black mask layer Download PDF

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KR920003153B1
KR920003153B1 KR1019880008758A KR880008758A KR920003153B1 KR 920003153 B1 KR920003153 B1 KR 920003153B1 KR 1019880008758 A KR1019880008758 A KR 1019880008758A KR 880008758 A KR880008758 A KR 880008758A KR 920003153 B1 KR920003153 B1 KR 920003153B1
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liquid crystal
black mask
crystal display
mask layer
glass substrate
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KR1019880008758A
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KR900002109A (en
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이종식
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서통 디스프레이테크 주식회사
유승은
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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

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  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Filters (AREA)
  • Liquid Crystal (AREA)

Abstract

A negative color liquid crystal display (LCD) element is produced by coating a photosensitive agent i.e. natural colloid gelatin on the surface of the transparent electrode (12) -formed glass substrate (12), drying the coated surface at 50-55 deg.C, aligning it with the photo mask and light-exposing it for 50 sec., developing it with 60 deg.C of hot water, forming a black mask in the dyeing tank, and coating an orientating agent on the black mask. the negative LCD element has an excellent contrast property and brightness.

Description

블랙 마스크(Black Mask)층을 형성한 네가티브형 칼라 액정표시 소자의 제조방법Manufacturing method of negative color liquid crystal display device in which black mask layer is formed

제1도는, 종래의 포지티브(Positive)형 액정표시 소자의 개략적인 구성을 나타낸 설명도.1 is an explanatory diagram showing a schematic configuration of a conventional positive liquid crystal display element.

제2도는, 종래의 네가티브(Negative)형 액정표시 소자의 개략적인 구성을 나타낸 설명도.2 is an explanatory diagram showing a schematic configuration of a conventional negative liquid crystal display element.

제3a도는, 본 발명의 블랙 마스크층을 형성한 네가티브형 칼라 액정 표시 소자의 구성예를 나타낸 설명도.3A is an explanatory diagram showing a configuration example of a negative color liquid crystal display element in which the black mask layer of the present invention is formed.

제3b도는, 본 발명의 블랙 마스크층을 형성한 네가티브형 칼라 액정 표시 소자의 액정표시 부분을 나타낸 설명도.3B is an explanatory diagram showing a liquid crystal display portion of the negative color liquid crystal display element in which the black mask layer of the present invention is formed.

* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings

1, 11 : 편광판 2, 12 : 유리기판1, 11: polarizer 2, 12: glass substrate

3, 13 :투명전극 4 : 접착제3, 13: transparent electrode 4: adhesive

5 : 액정층 6 : 반사판5 liquid crystal layer 6 reflecting plate

7 : 칼라필터 8 :블랙 마스크층7: color filter 8: black mask layer

본 발명은, 전계 효과형 액정표시소자 내부에 사진 석판술(Photo Lithographic)을 이용하여 블랙 마스크(Black Mask)의 얇은 막을 코우팅하여 콘트라스트 특성 및 선명도(Brightness)특성이 우수한 네가티브 (Negative)형 칼라 액정표시 소자의 제조방법에 관한 것이다.The present invention is a negative color having excellent contrast characteristics and brightness characteristics by coating a thin film of a black mask using photo lithographic inside a field effect liquid crystal display device. A method for manufacturing a liquid crystal display device.

종래의 전계효과형 액정표시 소자는, 통상적으로 한쪽면에 투명 전극이 형성된 유리기판을 서로 대향시키고, 이 기판 사이에는 액정층을 형성하여, 상기 투명전극 사이에 전원이 인가되면, 액정층에서 발생하는 전기 광학적 효과에 의하여 표시를 하도록 하는 구성인 것으로서, 이와 같은 전계 효과형 액정표시 소자의 기본적인 표시 구동방식으로는 포지티브(Positive)형과 네가티브(Negative)형이 있다.In the conventional field effect type liquid crystal display device, a glass substrate having a transparent electrode formed on one side thereof is usually opposed to each other, a liquid crystal layer is formed between the substrates, and when power is applied between the transparent electrodes, it is generated in the liquid crystal layer. In this configuration, display is performed by an electro-optical effect, and the basic display driving method of the field effect liquid crystal display device is a positive type and a negative type.

포지티브형의 경우에는, 제1도에 도시한 바와 같이 안쪽면에 투명전극(3)이 헝성되고 바깥측면에 전면 편광판(1)이 형성된 유리기판(2)과 안쪽면에 투명전극(13)이 형성되고 바깥쪽면에 후면편광판(11)이 형성된 유리기판(12)을 직교시켜 접착제(4)로 고정하고, 그 사이에는 트위스트(Twist)상태로 액정층(5)을 배향시켜 구성하므로서, 전원이 인가되지 않을때(구동되지 않을때)에는, 전면 편광판(1)을 통하여 입사된 빛은 트위스트 상태인 액정층(5)을 선회하여 후면 편광판(11)을 통하여 투과되어, 반사판(6)에서 반사되므로 입사 되었던 광통로를 따라 역으로 진행하게 되고, 전원이 인가되면(구동되는 상태), 액정분자의 긴축이 전계방향으로 세워짐에 따라, 전면 편광판(1)을 통하여 입사된 빛은 통과하지만, 직교시켜 놓은 후면 편광판(11)에 의하여서는 빛이 차단되므로 대향하는 투명전극(13)부분이 검게 보인다.In the case of the positive type, as shown in FIG. 1, the glass substrate 2 having the transparent electrode 3 formed on the inner side and the front polarizing plate 1 formed on the outer side thereof and the transparent electrode 13 on the inner side thereof are formed. The glass substrate 12 having the rear polarizing plate 11 formed on the outer surface thereof is orthogonal to be fixed with an adhesive 4, and the liquid crystal layer 5 is orientated in a twisted state therebetween, so that the power supply When not applied (not driven), light incident through the front polarizing plate 1 is transmitted through the rear polarizing plate 11 by turning the liquid crystal layer 5 in a twisted state and reflected by the reflecting plate 6. Therefore, the light proceeds in the reverse direction along the incident light path, and when power is applied (driven), as the contraction of the liquid crystal molecules is erected in the electric field direction, light incident through the front polarizer 1 passes, but is orthogonal. By the rear polarizer 11, the light Since the transparent opposite electrode 13 looks black portion.

한편, 네가티브형의 경우에는, 제2도에 도시한 바와 같이 안쪽면에 투명전극(3)이 형성되고 바깥쪽면에 전면 편광판(1)이 형성된 유리기판(2)과, 안쪽면에 투명전극(13)이 형성되고 바깥쪽면에 후면 괸광판(11)이 형성된 유리기판(12)을 평행하게 대향시켜 접착제(4)로 고정하고, 그 사이에는 트위스트 상태로 액정층을 구성하므로서, 전원이 인가되지 않을때(동작되지 않을때)에는, 전면 편광판(1)에 의하여 편광 입사된 빛은 트위스트 상태인 액정층을 선회하여 투과됨에 따라 후면 편광판(11)에 의하여 차단되므로 전면이 검게 보이게 되고, 전압이 인가되먼(동작되는 상태), 전계 방향으로 액정분자의 긴축이 세워지게 되므로 전면 편광판(1)을 통하여 입사된 빛은 액정층(5) 및 후면 편광판(11)을 통하여 빠져나가게 되므로 투명하게 보인다.On the other hand, in the case of the negative type, as shown in FIG. 2, the glass substrate 2 on which the transparent electrode 3 is formed on the inner side and the front polarizing plate 1 is formed on the outer side, and the transparent electrode (on the inner side) 13) are formed and the glass substrate 12 having the rear photosensitive plate 11 formed on the outer surface thereof is faced in parallel to be fixed with an adhesive agent 4, and a liquid crystal layer is formed in a twisted state, and power is not applied therebetween. When not in operation (no operation), the light polarized by the front polarizer 1 is blocked by the rear polarizer 11 as it passes through the liquid crystal layer in a twisted state, so that the front surface appears black, and the voltage Although applied (operating state), since the liquid crystal molecules are contracted in the electric field direction, the light incident through the front polarizer 1 exits through the liquid crystal layer 5 and the rear polarizer 11 and thus is transparent.

이와 같이 투명하게 보이는 부분에 색상을 표시하기 위하여서는 예를들면 뒤시면에 녹색과 적색 및 황색으로 구성된 필터(7)을 코우팅 한후, 뒷쪽에서 빛을 조사(Back Lighting)하도록 하면, 제2도에 도시한 네가티브형의 칼라 액정표시가 이루어진다.In order to display the color in this transparent part, for example, after coating the filter (7) composed of green, red, and yellow on the back side, the back lighting is applied to the back side. The negative color liquid crystal display shown in FIG.

그러나, 이 칼라표시 부분의 주위에는, 광학적으로는 빛이 완전히 차단되거나, 또는 완전히 차단되지 않게 되므로써, 주위의 빛으로부터 간섭의 영향을 받게되므로, 색상의 선명도와 콘트라스트 특성이 열화되는 결점이 있었다.However, around this color display portion, since light is completely blocked or not completely blocked optically, there is a drawback in that color clarity and contrast characteristics are deteriorated because interference is affected by ambient light.

본 발명은 종래의 이와 같은 결점을 개선하고자 한 것으로서, 후면의 유리기판(12)에 형성된 투명전극 (13)에서 투명표시 세그먼트(Segment)부분만을 제외한 모든 부분에 흑색의 얇은 막을 코우팅하여, 광투과성 효율을 높게 하므로써, 뒷쪽에서 빛을 조사하여 표출될때 배경 색상이 선명하고, 콘트라스트 특성이 우수한 칼라 액정표시 소자의 제조 방법에 관한 것으로서, 이를 첨부한 도면에 따라 상세히 설명하면 다음과 같다 .The present invention has been made to improve the above-described drawbacks, and by coating a black thin film on all portions of the transparent electrode 13 formed on the rear glass substrate 12 except for the transparent display segment, light The present invention relates to a method of manufacturing a color liquid crystal display device having a clear background color and excellent contrast characteristics when the light is emitted from the rear side by increasing the transmission efficiency, which will be described in detail with reference to the accompanying drawings.

제3a도는, 본 발명의 블랙 마스크층을 형성한 칼라 액정표시소자의 구성예를 나타낸 것으로서, 이와 같은 투명 전극이 형성된 유리기판위에 블랙 마스크층을 형성하는 방법을 실시예로서 설명하면 다음과 같다.FIG. 3A shows a configuration example of the color liquid crystal display device in which the black mask layer of the present invention is formed, and the method of forming the black mask layer on the glass substrate on which such a transparent electrode is formed will be explained as follows.

[실시예 1]Example 1

천연 콜로이드 젤라틴(Colloid Gelatine)의 감광제를 투명전극(13)이 형성된 유리기판(12)표면에 도포한 후 50℃ 내지 55℃ 에서 건조시킨다.The photosensitive agent of natural colloidal gelatin (Colloid Gelatine) is applied to the surface of the glass substrate 12 on which the transparent electrode 13 is formed and then dried at 50 ° C to 55 ° C.

이어서 정밀한 포토 마스크(Photo Mask)로 정렬 조정하여 50초동안 노광을 실시하여, 60℃ 의 보통의 온수를 현상액으로 이용하여 현상을 행한다.Subsequently, alignment is performed with a fine photo mask, followed by exposure for 50 seconds, and development is performed using ordinary hot water at 60 ° C as a developer.

다음에, 산성 분위기의 염욕조에서 필요한 모양으로 흑색을 착색하여 블랙 마스크층(8)을 형성한다.Next, black is colored into a shape required in a salt bath of an acidic atmosphere to form a black mask layer 8.

이어서, 세척한 후 건조시키고 배향제 도포공정으로 옮겨 본 발명의 칼라 액정표시소자를 제조한다.Subsequently, it wash | cleans, it dries, it moves to an orientation agent application process, and manufactures the color liquid crystal display element of this invention.

[실시예 2]Example 2

흙색의 폴리이미드(Polyimide)계의 용액 또는 흑색의 천연 콜로이드 젤라틴계의 용액을 투명전극(13)이 형성된 유리기판(12)표면에 도포한 후, 폴리이미드계의 용액은 90℃ 에서, 천연 콜로이드 젤라틴계의 용액은 70℃ 에서 30분간 건조시킨다.After applying an earthy polyimide solution or a black natural colloidal gelatin solution to the surface of the glass substrate 12 on which the transparent electrode 13 is formed, the polyimide solution is a natural colloid at 90 ° C. The gelatin solution is dried for 30 minutes at 70 ℃.

이어서, 감광제를 그 위에 도포하여 건조시킨 후, 정밀한 포토 마스크로 정렬 조정하여 16초 동안 노광을 실시한다.Subsequently, a photosensitive agent is apply | coated on it and dried, and it adjusts with a fine photo mask, and exposes for 16 second.

그 다음에, TMAH(Tetra Methyl Ammonium Hydroxide)현상액으로 현상하여 불필요한 감광제를 박리시켜서 필요한 모양의 블랙 마스크층(8)을 형성한다.Next, it develops with TMAH (Tetra Methyl Ammonium Hydroxide) developing solution, peels off unnecessary photosensitive agent, and forms the black mask layer 8 of a required shape.

이어서 이것을 완전경화시키기 위하여 건조시킨 후, 배향제의 도포공정으로 옮겨 본 발명의 칼라 액정표시 소자를 제조한다.Subsequently, after drying in order to fully cure this, it transfers to the application | coating process of an aligning agent, and manufactures the color liquid crystal display element of this invention.

이상에서 설명한 바와 같이 본 발명에 의하면, 유리기판위의 관투과성 효율을 높일 수 있게 되므로 색상이 선명하고, 콘트라스트 특성이 우수한 칼라 액정표시 소자를 제조할 수 있는 효과를 제공하는 것이다.As described above, according to the present invention, it is possible to increase the permeability efficiency on the glass substrate, thereby providing an effect of manufacturing a color liquid crystal display device having vivid colors and excellent contrast characteristics.

Claims (1)

천연 콜로이드 젤라틴의 감광제를 투명전극(13)이 형성된 유리기판(12) 표면에 도포한 후 50℃ 내지 55℃하에서 건조하는 공정과, 포토 마스크로 정렬 조정하여 50초 동안 노광을 실시하고 60℃의 보통온수로 현상하는 공정과, 산성분위기 염욕조에서 블랙마스크를 형성한 후 세척건조시켜 배향제를 도포하는 공정이 포함되는 블랙마스크층을 형성한 네가티브형 칼라 액정 표시 소자의 제조방법.The photoresist of the natural colloidal gelatin was applied to the surface of the glass substrate 12 having the transparent electrode 13 formed thereon, followed by drying at 50 ° C. to 55 ° C., followed by alignment with a photo mask for exposure for 50 seconds. A method for manufacturing a negative color liquid crystal display device comprising a black mask layer comprising a step of developing with normal hot water and a step of forming a black mask in an acid-based salt bath and washing and drying to apply an alignment agent.
KR1019880008758A 1988-07-14 1988-07-14 Method of negative type lcd performing black mask layer KR920003153B1 (en)

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