JPH05232309A - Color filter and liquid crystal display device using the same - Google Patents
Color filter and liquid crystal display device using the sameInfo
- Publication number
- JPH05232309A JPH05232309A JP3486892A JP3486892A JPH05232309A JP H05232309 A JPH05232309 A JP H05232309A JP 3486892 A JP3486892 A JP 3486892A JP 3486892 A JP3486892 A JP 3486892A JP H05232309 A JPH05232309 A JP H05232309A
- Authority
- JP
- Japan
- Prior art keywords
- color filter
- liquid crystal
- filter
- layer
- display device
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明はカラ−フィルタ及びそれ
を用いた液晶表示装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a color filter and a liquid crystal display device using the color filter.
【０００２】[0002]
【従来の技術】図５〜図７にそれぞれ従来のカラ−フィ
ルタを示している。図５に示すように透明なガラス基板
１上に、赤のフィルタ層Ｒ、緑のフィルタ層Ｇ、青のフ
ィルタ層Ｂを順次繰り返し配し、その隣接するフィルタ
層の一方の上に他方のフィルタ層を一部重ねることによ
り突出した遮光部分２を形成している。この遮光部分２
は光を遮光するので、例えば上方から見たとき、その部
分が黒に見えることになる。このように遮光手段を境界
部分に設けると、それぞれの色が際立って見えるという
利点を享受できる。2. Description of the Related Art FIGS. 5 to 7 show conventional color filters. As shown in FIG. 5, a red filter layer R, a green filter layer G, and a blue filter layer B are sequentially and repeatedly arranged on a transparent glass substrate 1, and the other filter is provided on one of the adjacent filter layers. The protruding light-shielding portion 2 is formed by partially overlapping the layers. This shaded part 2
Cuts off the light, so that, for example, when viewed from above, that part looks black. By providing the light shielding means at the boundary portion in this manner, it is possible to enjoy the advantage that each color is clearly seen.
【０００３】図６の従来例では、図５のカラ−フィルタ
の表面に更にオ−バ−コ−ト層３をスピンコ−ト法によ
って施している。次に図７の従来例ではガラス基板１上
に予め先にクロム材料よりなる遮光層４を形成し、各色
のフィルタ層Ｒ、Ｇ、Ｂを互いに離して配するようにし
ている。この遮光層４は各色のフィルタ層Ｒ、Ｇ、Ｂよ
りも薄い層となっている。そのため、フィルタ層Ｒ、
Ｇ、Ｂの境界部分にはスペ−ス５が生じる。このカラ−
フィルタの表面にもオ−バ−コ−ト層３が施される。そ
のとき、オ−バ−コ−ト層３はスペ−ス５にも補填され
るので、それに対応してオ−バ−コ−ト層３の上面に凹
部６が生じる。In the conventional example shown in FIG. 6, an overcoat layer 3 is further formed on the surface of the color filter shown in FIG. 5 by a spin coat method. Next, in the conventional example of FIG. 7, the light shielding layer 4 made of a chromium material is previously formed on the glass substrate 1 and the filter layers R, G, B of respective colors are arranged separately from each other. The light-shielding layer 4 is a layer thinner than the filter layers R, G, B of each color. Therefore, the filter layer R,
A space 5 is generated at the boundary between G and B. This color
The overcoat layer 3 is also applied to the surface of the filter. At this time, since the overcoat layer 3 is also filled in the space 5, the recess 6 is formed on the upper surface of the overcoat layer 3 correspondingly.
【０００４】[0004]
【発明が解決しようとする課題】上記図５の従来例では
明らかにカラ−フィルタの表面が凹凸形状になってい
る。図６のようにオ−バ−コ−ト層３を施した場合で
も、そのオ−バ−コ−ト層３の表面は凹凸した形となっ
て突出した遮光部分２の影響が残る。即ち、オ−バ−コ
−ト層３を施さないときのカラ−フィルタ表面の凹凸が
ｔ1の厚さで生じているのに対しオ−バ−コ−ト層３を
施したときのカラ−フィルタ表面の凹凸はｔ2の厚さに
低減されるが、依然として無視し得ない大きさで残って
いるのである。図７の場合も同様である。In the conventional example shown in FIG. 5, the surface of the color filter is obviously uneven. Even when the overcoat layer 3 is applied as shown in FIG. 6, the surface of the overcoat layer 3 becomes uneven and the effect of the protruding light-shielding portion 2 remains. That is, the unevenness of the surface of the color filter when the overcoat layer 3 is not applied is generated at the thickness of t 1 , whereas the unevenness when the overcoat layer 3 is applied is generated. The asperities on the filter surface are reduced to a thickness of t 2 , but still remain in a size that cannot be ignored. The same applies to the case of FIG.
【０００５】そのため、これらのカラ−フィルタを液晶
表示装置に用いた場合、配向不良が生じてしまう。即
ち、カラ−液晶表示装置では、良く知られているように
カラ−フィルタの表面に電極パタ−ンを設け、更にその
上に配向膜を介して液晶を封入している。このとき、液
晶の他面には配向膜と電極を順次設けたガラス基板が配
設されている。このような構造において、カラ−フィル
タ表面に凹凸が存すると、それに電極を介して接する配
向膜も凹凸をもつことになる。そのため配向膜に接する
液晶も凹凸面となる。液晶が凹凸をもって封入されてい
ることは液晶のねじれ具合いが影響を受けることを意味
する。このため、例えば９０°のねじれをもつように意
図された液晶のねじれがばらついて配向不良となるので
ある。Therefore, when these color filters are used in a liquid crystal display device, defective alignment occurs. That is, in a color liquid crystal display device, as is well known, an electrode pattern is provided on the surface of a color filter, and liquid crystal is sealed on the electrode pattern via an alignment film. At this time, a glass substrate on which an alignment film and electrodes are sequentially provided is disposed on the other surface of the liquid crystal. In such a structure, if unevenness is present on the surface of the color filter, the alignment film that is in contact therewith also has unevenness. Therefore, the liquid crystal in contact with the alignment film also has an uneven surface. The fact that the liquid crystal is encapsulated with irregularities means that the twisting condition of the liquid crystal is affected. For this reason, the twist of the liquid crystal, which is intended to have a twist of 90 °, for example, varies, resulting in poor alignment.
【０００６】上記カラ−フィルタの凹凸を零とするため
には図６、図７のオ−バ−コ−ト層３の上に更に第２、
第３のオ−バ−コ−ト層を設けなければならない。これ
は明らかにカラ−フィルタの厚さを大きくすることを意
味し、カラ−フィルタの薄型化が図れなくなる。In order to reduce the unevenness of the color filter to zero, a second layer is formed on the overcoat layer 3 shown in FIGS.
A third overcoat layer must be provided. This obviously means increasing the thickness of the color filter, and the color filter cannot be made thinner.
【０００７】本発明はこのような点に鑑みなされたもの
であって、薄型化可能で且つ表面の平坦なカラ−フィル
タ及びそれを用いた液晶表示装置を提供することを目的
とする。The present invention has been made in view of the above points, and an object thereof is to provide a color filter which can be made thin and has a flat surface, and a liquid crystal display device using the same.
【０００８】[0008]
【課題を解決するための手段】上記の目的を達成するた
め本発明では、透明基板上に３色のフィルタ層を繰り返
し配するとともに隣接するフィルタ層同士を一部重ね合
わせることにより境界部分に突出した遮光部分を形成し
て成るカラ−フィルタにおいて、遮光部分と遮光部分と
の間に生じた凹部を透明なコ−ト層で補填した構造とし
ている。この場合、前記透明なコ−ト層で凹部が補填さ
れた表面に更に第２のコ−ト層を施してもよい。In order to achieve the above object, according to the present invention, filter layers of three colors are repeatedly arranged on a transparent substrate, and adjacent filter layers are partially overlapped with each other so that they project at a boundary portion. In the color filter formed by forming the light-shielding portion, the recess formed between the light-shielding portion and the light-shielding portion is filled with a transparent coat layer. In this case, a second coat layer may be further applied to the surface where the concave portion is filled with the transparent coat layer.
【０００９】また、本発明では、透明基板上に３色のフ
ィルタ層を繰り返し配するとともに隣接するフィルタ層
同士の間に前記フィルタ層よりも薄い遮光層を前記フィ
ルタ層とは別に形成して成るカラ−フィルタにおいて、
遮光層の上に生じた凹部をコ−ト層で補填した構造とし
ている。Further, according to the present invention, filter layers of three colors are repeatedly arranged on a transparent substrate, and a light shielding layer thinner than the filter layer is formed between adjacent filter layers separately from the filter layer. In the color filter,
The structure is such that the concave portion formed on the light shielding layer is filled with the coat layer.
【００１０】本発明の液晶表示装置は上記のように構成
されたカラ−フィルタの表面に配向膜、液晶を順次配す
ることにより形成している。The liquid crystal display device of the present invention is formed by sequentially disposing the alignment film and the liquid crystal on the surface of the color filter constructed as described above.
【００１１】[0011]
【作用】上記のカラ−フィルタによれば遮光手段を設け
ることによって生じる表面の凹凸が実質的に除去され平
坦になる。このカラ−フィルタを用いた液晶表示装置に
おいては、配向膜にも凹凸が生じないので、液晶のねじ
れがカラ−フィルタによって影響を受けない。According to the color filter described above, the unevenness on the surface caused by providing the light shielding means is substantially removed and the surface becomes flat. In the liquid crystal display device using this color filter, since the alignment film does not have unevenness, the twist of the liquid crystal is not affected by the color filter.
【００１２】[0012]
【実施例】本発明を実施した図１において、図５に示す
従来例と同一部分には同一の符号を付してある。この実
施例では、透明なガラス基板１上に配された３色のフィ
ルタ層Ｒ、Ｇ、Ｂの突出した遮光部分２と遮光部分２と
の間に生じた凹部１０に透明なコ−ト層１１を設けてい
る。このコ−ト層１１は、これに限る必要はないが、印
刷法により形成されたものである。このように凹部１０
をコ−ト層１１で補填することによりカラ−フィルタの
表面は殆ど平坦化される。1 of the present invention, the same parts as those of the conventional example shown in FIG. 5 are designated by the same reference numerals. In this embodiment, a transparent coat layer is formed in the recess 10 formed between the light-shielding portion 2 and the light-shielding portion 2 in which the filter layers R, G, B of three colors arranged on the transparent glass substrate 1 are projected. 11 is provided. The coat layer 11 is formed by a printing method, although not limited thereto. Thus, the recess 10
The surface of the color filter is almost flattened by supplementing it with the coat layer 11.
【００１３】図２の実施例は図１のカラ−フィルタの表
面に更に第２のコ−ト層１２をスピンコ−ト法により形
成している。これにより、カラ−フィルタの表面の凹凸
は殆ど無視できる程、小さくなる。In the embodiment of FIG. 2, a second coat layer 12 is further formed on the surface of the color filter of FIG. 1 by a spin coat method. As a result, the irregularities on the surface of the color filter are so small that they can be almost ignored.
【００１４】図３の実施例はフィルタ層Ｒ、Ｇ、Ｂの間
に遮光層４をフィルタ層Ｒ、Ｇ、Ｂとは別に形成したこ
とにより生じるスペ−ス５に印刷法によりオ−バ−コ−
ト層１１を施している。そして、このように形成された
カラ−フィルタの表面上に更に第２のオ−バ−コ−ト層
１２をスピンコ−ト法により形成している。この場合
も、カラ−フィルタの表面（オ−バ−コ−ト層１２の表
面）の凹凸は実質的に無視できる状態となる。In the embodiment shown in FIG. 3, the space 5 formed by forming the light shielding layer 4 between the filter layers R, G and B separately from the filter layers R, G and B is overprinted by a printing method. Co-
Layer 11 is applied. Then, the second overcoat layer 12 is further formed on the surface of the color filter thus formed by the spin coat method. Also in this case, the unevenness on the surface of the color filter (the surface of the overcoat layer 12) is substantially negligible.
【００１５】上記図１〜図３の各カラ−フィルタは例え
ば液晶表示装置に用いられる。図４に図２のカラ−フィ
ルタを用いた液晶表示装置を示している。同図におい
て、カラ−フィルタのオ−バ−コ−ト層１２上には、液
晶表示装置の電極１３が設けられ、その上に配向膜１４
が形成される。一方、電極１７と配向膜１８が形成され
たガラス基板１６が図示の如く配設され、液晶１５は配
向膜１４、１８に接する形で封入される。The color filters shown in FIGS. 1 to 3 are used, for example, in a liquid crystal display device. FIG. 4 shows a liquid crystal display device using the color filter of FIG. In the figure, an electrode 13 of a liquid crystal display device is provided on an overcoat layer 12 of a color filter, and an alignment film 14 is provided thereon.
Is formed. On the other hand, the glass substrate 16 on which the electrode 17 and the alignment film 18 are formed is arranged as shown in the drawing, and the liquid crystal 15 is sealed so as to be in contact with the alignment films 14 and 18.
【００１６】この液晶表示装置においてはカラ−フィル
タのオ−バ−コ−ト層１２の表面に生じる凹凸が無視で
きる程、小さいので、配向膜１４に凹凸が生じない。従
って、液晶１５が不所望なねじれを受けることがなく、
予め設定した液晶のねじれが変わることがない。このた
め従来例に比し配向性が極めて良好となる。しかも、オ
−バ−コ−ト層１２を何層も設ける必要がないので、液
晶装置全体の薄型化を図ることができる。In this liquid crystal display device, since the unevenness on the surface of the overcoat layer 12 of the color filter is so small that it can be ignored, the alignment film 14 does not have unevenness. Therefore, the liquid crystal 15 is not undesirably twisted,
The twist of the preset liquid crystal does not change. Therefore, the orientation becomes extremely better than that of the conventional example. Moreover, since it is not necessary to provide any number of overcoat layers 12, the liquid crystal device as a whole can be made thin.
【００１７】図１、図３のカラ−フィルタを用いて液晶
表示装置を構成することもでき、その場合、図４の液晶
表示装置と同様な効果を得ることができる。A liquid crystal display device can be constructed by using the color filters of FIGS. 1 and 3, and in that case, the same effect as that of the liquid crystal display device of FIG. 4 can be obtained.
【００１８】[0018]
【発明の効果】以上説明したように本発明によれば、カ
ラ−フィルタはオ−バ−コ−ト層を何層も設けなくて
も、その表面の凹凸を実質的に無視し得る程小さくでき
る。このカラ−フィルタを用いた液晶表示装置では、カ
ラ−フィルタ表面に接する配向膜に凹凸が生じないの
で、液晶が不所望なねじれを受けることがなく、従って
予め設定した液晶のねじれ角が変わることがない。この
ため薄型でありながら配向性が極めて良好となる。As described above, according to the present invention, the color filter is so small that surface irregularities can be substantially ignored without providing any number of overcoat layers. it can. In the liquid crystal display device using this color filter, since the alignment film in contact with the surface of the color filter does not have irregularities, the liquid crystal is not subjected to an undesired twist, and therefore the preset twist angle of the liquid crystal is changed. There is no. For this reason, the orientation is extremely good while being thin.
【図１】本発明を実施したカラ−フィルタの構造図。FIG. 1 is a structural diagram of a color filter embodying the present invention.
【図２】本発明の他の実施例としてのカラ−フィルタの
構造図。FIG. 2 is a structural diagram of a color filter as another embodiment of the present invention.
【図３】本発明の更に他の実施例としてのカラ−フィル
タの構造図。FIG. 3 is a structural diagram of a color filter as still another embodiment of the present invention.
【図４】図２のカラ−フィルタを用いた本発明の液晶表
示装置の構造図。4 is a structural diagram of a liquid crystal display device of the present invention using the color filter of FIG.
【図５】従来例のカラ−フィルタの構造図。FIG. 5 is a structural diagram of a conventional color filter.
【図６】他の従来例のカラ−フィルタの構造図。FIG. 6 is a structural diagram of another conventional color filter.
【図７】更に他の従来例のカラ−フィルタの構造図。FIG. 7 is a structural diagram of still another conventional color filter.
１ ガラス基板 ２ 遮光部分 １１、１２ オ−バ−コ−ト層 １３ 電極 １４ 配向膜 １５ 液晶 DESCRIPTION OF SYMBOLS 1 Glass substrate 2 Light-shielding part 11 and 12 Overcoat layer 13 Electrode 14 Alignment film 15 Liquid crystal
Claims (4)
配するとともに隣接するフィルタ層同士を一部重ね合わ
せることにより境界部分に突出した遮光部分を形成して
成るカラ−フィルタにおいて、 前記遮光部分と遮光部分との間に生じた凹部を透明なコ
−ト層で補填したことを特徴とするカラ−フィルタ。1. A color filter comprising a transparent substrate on which filter layers of three colors are repeatedly arranged and adjacent filter layers are partially overlapped with each other to form a light-shielding portion projecting at a boundary portion. A color filter characterized in that a concave portion formed between a portion and a light shielding portion is filled with a transparent coat layer.
面に更に第２のコ−ト層を施したことを特徴とする請求
項１に記載のカラ−フィルタ。2. The color filter according to claim 1, further comprising a second coat layer formed on the surface of the transparent coat layer in which the concave portions are filled.
配するとともに隣接するフィルタ層同士の間に前記フィ
ルタ層よりも薄い遮光層を前記フィルタ層とは別に形成
して成るカラ−フィルタにおいて、 前記遮光層の上に生じた凹部をコ−ト層で補填したこと
を特徴とするカラ−フィルタ。3. A color filter in which filter layers of three colors are repeatedly arranged on a transparent substrate and a light shielding layer thinner than the filter layer is formed between adjacent filter layers separately from the filter layer. A color filter characterized in that a concave portion formed on the light shielding layer is filled with a coat layer.
記載のカラ−フィルタの表面に配向膜、液晶を順次配し
て成る液晶表示装置。4. A liquid crystal display device in which an alignment film and liquid crystals are sequentially arranged on the surface of the color filter according to claim 1, claim 2, or claim 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3486892A JPH05232309A (en) | 1992-02-21 | 1992-02-21 | Color filter and liquid crystal display device using the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3486892A JPH05232309A (en) | 1992-02-21 | 1992-02-21 | Color filter and liquid crystal display device using the same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH05232309A true JPH05232309A (en) | 1993-09-10 |
Family
ID=12426141
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3486892A Pending JPH05232309A (en) | 1992-02-21 | 1992-02-21 | Color filter and liquid crystal display device using the same |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH05232309A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010528337A (en) * | 2007-11-20 | 2010-08-19 | エルジー・ケム・リミテッド | Color filter substrate |
| JP2011053585A (en) * | 2009-09-04 | 2011-03-17 | Toppan Printing Co Ltd | Color filter and manufacturing method therefor |
| US7973886B2 (en) | 2003-03-13 | 2011-07-05 | Samsung Electronics Co., Ltd. | Four color liquid crystal display and panel therefor |
-
1992
- 1992-02-21 JP JP3486892A patent/JPH05232309A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7973886B2 (en) | 2003-03-13 | 2011-07-05 | Samsung Electronics Co., Ltd. | Four color liquid crystal display and panel therefor |
| JP2010528337A (en) * | 2007-11-20 | 2010-08-19 | エルジー・ケム・リミテッド | Color filter substrate |
| US8300184B2 (en) | 2007-11-20 | 2012-10-30 | Lg Chem, Ltd. | Color filter substrate |
| JP2011053585A (en) * | 2009-09-04 | 2011-03-17 | Toppan Printing Co Ltd | Color filter and manufacturing method therefor |
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