JPH08220331A - Color liquid crystal display element - Google Patents
Color liquid crystal display elementInfo
- Publication number
- JPH08220331A JPH08220331A JP2318095A JP2318095A JPH08220331A JP H08220331 A JPH08220331 A JP H08220331A JP 2318095 A JP2318095 A JP 2318095A JP 2318095 A JP2318095 A JP 2318095A JP H08220331 A JPH08220331 A JP H08220331A
- Authority
- JP
- Japan
- Prior art keywords
- color filter
- liquid crystal
- color
- crystal display
- display element
- 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.)
- Granted
Links
- 239000004973 liquid crystal related substance Substances 0.000 title claims description 18
- 239000000758 substrate Substances 0.000 claims description 9
- 239000003086 colorant Substances 0.000 claims description 6
- 230000001154 acute effect Effects 0.000 claims description 4
- 238000000034 method Methods 0.000 abstract description 4
- 239000000049 pigment Substances 0.000 description 10
- 230000008961 swelling Effects 0.000 description 8
- 239000000463 material Substances 0.000 description 4
- 239000011521 glass Substances 0.000 description 3
- 239000002253 acid Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 235000000177 Indigofera tinctoria Nutrition 0.000 description 1
- 239000004642 Polyimide Substances 0.000 description 1
- PYKYMHQGRFAEBM-UHFFFAOYSA-N anthraquinone Natural products CCC(=O)c1c(O)c2C(=O)C3C(C=CC=C3O)C(=O)c2cc1CC(=O)OC PYKYMHQGRFAEBM-UHFFFAOYSA-N 0.000 description 1
- 150000004056 anthraquinones Chemical class 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000004040 coloring Methods 0.000 description 1
- 150000004696 coordination complex Chemical class 0.000 description 1
- PPSZHCXTGRHULJ-UHFFFAOYSA-N dioxazine Chemical compound O1ON=CC=C1 PPSZHCXTGRHULJ-UHFFFAOYSA-N 0.000 description 1
- 239000005262 ferroelectric liquid crystals (FLCs) Substances 0.000 description 1
- 229940097275 indigo Drugs 0.000 description 1
- COHYTHOBJLSHDF-UHFFFAOYSA-N indigo powder Natural products N1C2=CC=CC=C2C(=O)C1=C1C(=O)C2=CC=CC=C2N1 COHYTHOBJLSHDF-UHFFFAOYSA-N 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 239000011147 inorganic material Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000011368 organic material Substances 0.000 description 1
- 239000012860 organic pigment Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 238000000059 patterning Methods 0.000 description 1
- 125000002080 perylenyl group Chemical group C1(=CC=C2C=CC=C3C4=CC=CC5=CC=CC(C1=C23)=C45)* 0.000 description 1
- CSHWQDPOILHKBI-UHFFFAOYSA-N peryrene Natural products C1=CC(C2=CC=CC=3C2=C2C=CC=3)=C3C2=CC=CC3=C1 CSHWQDPOILHKBI-UHFFFAOYSA-N 0.000 description 1
- 238000000206 photolithography Methods 0.000 description 1
- IEQIEDJGQAUEQZ-UHFFFAOYSA-N phthalocyanine Chemical compound N1C(N=C2C3=CC=CC=C3C(N=C3C4=CC=CC=C4C(=N4)N3)=N2)=C(C=CC=C2)C2=C1N=C1C2=CC=CC=C2C4=N1 IEQIEDJGQAUEQZ-UHFFFAOYSA-N 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 125000003367 polycyclic group Chemical group 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 238000004528 spin coating Methods 0.000 description 1
Landscapes
- Optical Filters (AREA)
- Liquid Crystal (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、カラーフィルタを透過
する光の色の組み合わせにより種々の情報をカラー表示
するカラー液晶表示素子に係り、詳しくはカラーフィル
タの形状に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a color liquid crystal display device for displaying various information in color by combining the colors of light transmitted through the color filters, and more particularly to the shape of the color filters.
【０００２】[0002]
【従来の技術】従来より、カラー液晶表示素子は種々提
案されている。2. Description of the Related Art Conventionally, various color liquid crystal display devices have been proposed.
【０００３】このカラー液晶表示素子Ｐ1 は、図１及び
図２に示すように、２枚の透明なガラス基板１を備えて
おり（一方のみ図示）、一方のガラス基板１の表面には
ブラックマスク２が形成されている。このブラックマス
ク２は多数の開口部２ａ，…を有しており、これらの開
口部２ａ，…を閉塞するように、３色（Ｒ，Ｇ，Ｂ）又
は４色（Ｒ，Ｇ，Ｂ，Ｗ）のカラーフィルタ３，…が形
成されている。なお、これらのカラーフィルタ３，…
は、図に示すように、開口部２ａ，…よりも多少大きめ
に形成されている。これは、表示品質等の点からカラー
フィルタ３，…が開口部２ａ，…を完全に閉塞する必要
がある一方、マスクアライメント精度によってカラーフ
ィルタ３，…の形成領域が多少変動することを考慮し、
マスクアライメント精度にかかわらずカラーフィルタ
３，…が開口部２ａ，…を完全に閉塞するようにしたも
のである。As shown in FIGS. 1 and 2, this color liquid crystal display device P 1 is provided with two transparent glass substrates 1 (only one is shown), and the surface of one glass substrate 1 is black. The mask 2 is formed. The black mask 2 has a large number of openings 2a, ... And three colors (R, G, B) or four colors (R, G, B, ...) To block these openings 2a ,. The color filters 3, ... Of W) are formed. In addition, these color filters 3, ...
Are formed slightly larger than the openings 2a, ... As shown in the figure. This is because in consideration of display quality and the like, the color filters 3, ... Must completely close the openings 2a, ..., On the other hand, the formation area of the color filters 3 ,. ,
The color filters 3, ... Completely close the openings 2a ,.
【０００４】また、カラーフィルタ３，…はその色によ
って膜厚が多少異なるが、セルギャップの均一化が望ま
れる強誘電性液晶表示素子等においては平坦化膜５がカ
ラーフィルタ３，…を覆うように形成されて、セルギャ
ップの均一化が図られている（図２参照）。The color filters 3, ... Have different film thicknesses depending on their colors, but in a ferroelectric liquid crystal display device or the like in which a uniform cell gap is desired, a flattening film 5 covers the color filters 3 ,. Thus, the cell gap is made uniform (see FIG. 2).
【０００５】[0005]
【発明が解決しようとする課題】しかし、これらのカラ
ーフィルタ３，…では、その端縁部に図２に示すような
盛り上がりが発生し、コーナ部３ａ，…では、隣り合う
２端縁部の盛り上がりが相乗して作用し、特に大きな盛
り上がりが発生していた。なお、本発明者が実際に確認
したところによると、膜厚が１．５μｍのカラーフィル
タの場合、端縁部の盛り上がり寸法Ｈ1 が０．０１〜
０．３μｍとなり、コーナ部では０．３〜０．５μｍに
達していた。そして、平坦化膜５を形成しない場合はも
ちろんのこと、平坦化膜５を形成した場合であってもコ
ーナ部の盛り上がりによってセルギャップが不均一とな
り、表示品質が劣化してしまうという問題があった。However, in these color filters 3, ..., Swelling occurs at the edge portions as shown in FIG. 2, and in the corner portions 3a, .. The swells acted synergistically, and a particularly large swell occurred. According to what the present inventor actually confirmed, in the case of a color filter having a film thickness of 1.5 μm, the swelling dimension H 1 of the edge portion is 0.01 to
It was 0.3 μm, reaching 0.3 to 0.5 μm at the corner. Then, not only when the flattening film 5 is not formed, but also when the flattening film 5 is formed, there is a problem that the cell gap becomes non-uniform due to the swelling of the corner portion and the display quality is deteriorated. It was
【０００６】そこで、本発明は、カラーフィルタのコー
ナ部を、直角部や鋭角部を有しないように形成すること
により、表示品質の良好なカラー液晶表示素子を提供す
ることを目的とするものである。Therefore, an object of the present invention is to provide a color liquid crystal display element having good display quality by forming the corner portion of the color filter so as not to have a right angle portion or an acute angle portion. is there.
【０００７】[0007]
【課題を解決するための手段】本発明は、上述事情に鑑
みなされたものであって、２枚の基板と、これら２枚の
基板の間隙に配置された液晶と、少なくともいずれか１
枚の基板に形成されたカラーフィルタと、を備え、カラ
ーフィルタを透過する光の色の組み合わせにより種々の
情報をカラー表示するカラー液晶表示素子において、前
記カラーフィルタのコーナ部が、直角部や鋭角部を有し
ないように形成された、ことを特徴とする。SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and includes at least one of two substrates and a liquid crystal arranged in a gap between the two substrates.
In a color liquid crystal display device comprising a color filter formed on a single substrate and displaying various information in color by a combination of colors of light transmitted through the color filter, a corner portion of the color filter has a right angle portion or an acute angle. It is characterized in that it is formed so as not to have a portion.
【０００８】この場合、前記カラーフィルタのコーナ部
がＲ面取りされてなる、ようにしてもよい。その場合に
は、前記コーナ部の半径が、３〜２０μｍの範囲であ
る、ようにすると好ましい。また、前記カラーフィルタ
のコーナ部がＣ面取りされてなる、ようにしてもよい。
その場合には、前記コーナ部が、３〜２０μｍの幅にわ
たってＣ面取りされてなる、ようにすると好ましい。In this case, the corner portion of the color filter may be chamfered. In that case, it is preferable that the radius of the corner portion is in the range of 3 to 20 μm. Further, the corner portion of the color filter may be chamfered.
In that case, it is preferable that the corner portion is C-chamfered over a width of 3 to 20 μm.
【０００９】[0009]
【作用】以上構成に基づき、カラーフィルタのコーナ部
が、直角部や鋭角部を有しないように形成されるため、
該カラーフィルタの端縁部が盛り上がったとしても、コ
ーナ部においては、隣り合う２端縁部の盛り上がりが相
乗して作用しにくく、盛り上がりは抑制される。したが
って、カラーフィルタの膜厚が均一化される。With the above structure, the corner portion of the color filter is formed so as not to have a right-angled portion or an acute-angled portion.
Even if the edge portion of the color filter swells, the swelling of two adjacent edge portions is difficult to act synergistically at the corner portion, and the swelling is suppressed. Therefore, the film thickness of the color filter is made uniform.
【００１０】[0010]
【実施例】以下、図面に沿って、本発明の実施例につい
て説明する。なお、図１に示すものと同一部分は同一符
号を付して説明を省略する。Embodiments of the present invention will be described below with reference to the drawings. The same parts as those shown in FIG. 1 are designated by the same reference numerals and the description thereof will be omitted.
【００１１】まず、本発明の第１実施例について、図３
に沿って説明する。First, FIG. 3 shows the first embodiment of the present invention.
It is explained along.
【００１２】本実施例においても、上述従来例と同様
に、ブラックマスク２の開口部２ａ，…を覆うようにカ
ラーフィルタ１３，…が形成されているが、その４隅の
コーナ部１３ａ，…は、半径が３〜２０μｍ程度となる
ようにＲ面取りされている。また、カラーフィルタ１
３，…は、アライメント精度を考慮して開口部２ａ，…
よりも多少大きめに形成されており、隣合うカラーフィ
ルタ１３，１３どうしが互いに重ならないように形成さ
れている。なお、これらのカラーフィルタ１３，…の形
成には、ポリアミド系又はポリイミド系の感光性樹脂を
主成分とする材料中に着色材料を分散させた溶液を使用
しており、着色材料には、例えば、有機顔料としては、
溶解アゾ系、不溶解アゾ系等のアゾ系顔料や、フタロシ
アニン系顔料、インジゴ系、アントラキノン系、ペリレ
ン系、ジオキサジン系、その他金属錯体系を含む縮合多
環系顔料が用いられている。また、そのパターニングに
はフォトリソグラフィを用いており、Ｒ面取りを施した
フォトマスクを用いて露光する方法が採られている。Also in this embodiment, the color filters 13 are formed so as to cover the openings 2a of the black mask 2 as in the above-mentioned conventional example, but the corner portions 13a of the four corners are formed. Is rounded to have a radius of about 3 to 20 μm. In addition, color filter 1
, ... are openings 2a, ... In consideration of alignment accuracy.
The color filters 13 are formed to be slightly larger than the color filters 13 and 13 so that the adjacent color filters 13 do not overlap each other. For forming these color filters 13, ..., a solution in which a coloring material is dispersed in a material containing a polyamide-based or polyimide-based photosensitive resin as a main component is used. , As organic pigments,
Azo pigments such as dissolved azo pigments and insoluble azo pigments, phthalocyanine pigments, indigo pigments, anthraquinone pigments, perylene pigments, dioxazine pigments, and condensed polycyclic pigments including other metal complex pigments are used. Moreover, photolithography is used for the patterning, and a method of exposing using a photomask having R chamfering is adopted.
【００１３】また、本実施例においては、カラーフィル
タ１３，…を覆うようにして平坦化膜が形成されている
（図３においては不図示）。この平坦化膜の厚さは２〜
３μｍ程度であり、シロキ酸系平坦化材料をスピンコー
ト法にて塗布することにより形成されている。そして、
この平坦化膜によって、カラーフィルタ画素膜厚差を１
０００Å以内に抑えて平坦性を確保すると共にカラーフ
ィルタ間の溝埋めを行なっている。Further, in this embodiment, a flattening film is formed so as to cover the color filters 13, ... (Not shown in FIG. 3). This flattening film has a thickness of 2 to
It is about 3 μm, and is formed by applying a silokic acid-based planarizing material by a spin coating method. And
This flattening film reduces the color filter pixel film thickness difference to 1
It is kept within 000Å to ensure flatness and fills the gap between the color filters.
【００１４】次に、本実施例の作用について説明する。Next, the operation of this embodiment will be described.
【００１５】以上構成に基づき、カラーフィルタ１３，
…のコーナ部１３ａ，…がＲ面取りされているため、カ
ラーフィルタ１３，…の端縁部が盛り上がったとして
も、コーナ部１３ａ，…においては、隣り合う２端縁部
の盛り上がりが相乗して作用しにくく、盛り上がりは抑
制される。したがって、カラーフィルタ１３，…の膜厚
が均一化される。Based on the above configuration, the color filters 13,
Since the corner portions 13a, ... Of R are chamfered, even if the edge portions of the color filters 13, .. rise, the ridges of two adjacent edge portions in the corner portions 13a ,. It is hard to work and swell is suppressed. Therefore, the film thicknesses of the color filters 13, ... Are made uniform.
【００１６】次に、本実施例の効果について説明する。Next, the effect of this embodiment will be described.
【００１７】本実施例によれば、カラーフィルタ１３，
…のコーナ部１３ａ，…の盛り上がりは、製造過程にお
ける種々の条件（プリベーク時の酸素、水分などの影響
や、露光時の光回折、現像及びリンス条件による解像性
など）により変化するものの、同一条件の下では従来形
状のカラーフィルタと比べて低減され、カラーフィルタ
の平坦性が向上される。このため、平坦化膜の膜厚ムラ
が抑制され、表示品質の良好なカラー液晶表示素子を得
ることができる。なお、本発明者が実験したところによ
ると、膜厚が１．５μｍのカラーフィルタの場合、端縁
部の盛り上がりは０．０１〜０．３μｍで従来の場合と
同等であるものの、コーナ部の盛り上がりは０．３〜
０．５μｍから０．０１〜０．３μｍまでに低減されて
いることが確認できた。また、平坦化膜の盛り上がり
は、約０．１５μｍから約０．１μｍに低減されている
ことが確認できた。なお、本発明者は、半径が３〜２０
μｍの範囲内でＲ面取りした場合にセルギャップの均一
化が達成されることを、実験により確認している。According to this embodiment, the color filters 13,
Although the swelling of the corner portions 13a, ... Of the corner portions 13a, ... varies depending on various conditions in the manufacturing process (effects of oxygen and moisture during prebaking, light diffraction during exposure, resolution due to development and rinse conditions, etc.), Under the same condition, the color filter is reduced as compared with the conventional color filter, and the flatness of the color filter is improved. Therefore, it is possible to obtain a color liquid crystal display element with good display quality by suppressing unevenness in the thickness of the flattening film. According to experiments conducted by the present inventor, in the case of a color filter having a film thickness of 1.5 μm, the swelling of the edge portion is 0.01 to 0.3 μm, which is equivalent to the conventional case, but The excitement is 0.3 ~
It was confirmed that the thickness was reduced from 0.5 μm to 0.01 to 0.3 μm. It was also confirmed that the swelling of the flattening film was reduced from about 0.15 μm to about 0.1 μm. The present inventor has a radius of 3 to 20.
It has been confirmed by an experiment that uniformization of the cell gap is achieved when the R chamfering is performed within the range of μm.
【００１８】なお、上述実施例においては、カラーフィ
ルタ１３，…にＲ面取りを施すものとしたが、もちろん
これに限る必要はなく、３〜２０μｍの幅（カラーフィ
ルタの端縁に沿った方向の幅）にわたってＣ面取りを形
成してもよく（図４参照）、同等な加工を施すようにし
てもよい。つまり、カラーフィルタ１３，…，２３，…
のコーナ部１３ａ，…，２３ａ，…が直角部や鋭角部を
有しないように形成すればよい。また、上述実施例にお
いては平坦化膜を形成するものとしたが、もちろんこれ
に限る必要はなく、平坦化膜を形成しないようにしても
よい。さらに、上述実施例においては、シロキ酸系平坦
化材料を用いたが、もちろんこれに限る必要はなく、他
の有機材料や無機材料を用いて形成してもよい。In the above-mentioned embodiment, the color filters 13, ... Are chamfered, but the invention is not limited to this, and the width is 3 to 20 .mu.m (in the direction along the edge of the color filter). A C-chamfer may be formed over the width (see FIG. 4), or an equivalent process may be performed. That is, the color filters 13, ..., 23, ...
, 23a, ... may be formed so as not to have a right angle portion or an acute angle portion. Further, although the flattening film is formed in the above-mentioned embodiment, it is not necessary to limit to this, and the flattening film may not be formed. Furthermore, in the above-mentioned embodiments, the silokic acid-based planarizing material is used, but it is not limited to this, and other organic materials or inorganic materials may be used.
【００１９】[0019]
【発明の効果】以上説明したように、本発明によると、
カラーフィルタの膜厚が均一化される。したがって、そ
の分セルギャップが均一化され、表示品質の良好なカラ
ー液晶表示素子を得ることができる。As described above, according to the present invention,
The film thickness of the color filter is made uniform. Therefore, the cell gap can be made uniform by that amount, and a color liquid crystal display element with good display quality can be obtained.
【図１】従来のカラーフィルタの形状を示す平面図。FIG. 1 is a plan view showing the shape of a conventional color filter.
【図２】従来の問題点を説明するための断面図。FIG. 2 is a cross-sectional view for explaining a conventional problem.
【図３】本発明の一実施例におけるカラーフィルタの形
状を示す平面図。FIG. 3 is a plan view showing the shape of a color filter according to an embodiment of the present invention.
【図４】本発明の他の実施例におけるカラーフィルタの
形状を示す平面図。FIG. 4 is a plan view showing the shape of a color filter according to another embodiment of the present invention.
１ ガラス基板 ２ ブラックマスク ２ａ，… 開口部 １３，… カラーフィルタ １３ａ，… コーナ部 ２３，… カラーフィルタ ２３ａ，… コーナ部 Ｐ1 カラー液晶表示素子 Ｐ2 カラー液晶表示素子 Ｐ3 カラー液晶表示素子1 Glass Substrate 2 Black Mask 2a, Opening 13, Color Filter 13a, Corner 23, Color Filter 23a, Corner P 1 Color Liquid Crystal Display P 2 Color Liquid Crystal Display P 3 Color Liquid Crystal Display
Claims (5)
に配置された液晶と、少なくともいずれか１枚の基板に
形成されたカラーフィルタと、を備え、カラーフィルタ
を透過する光の色の組み合わせにより種々の情報をカラ
ー表示するカラー液晶表示素子において、 前記カラーフィルタのコーナ部が、直角部や鋭角部を有
しないように形成された、 ことを特徴とするカラー液晶表示素子。1. A light source comprising two substrates, a liquid crystal arranged in a gap between the two substrates, and a color filter formed on at least one of the substrates. A color liquid crystal display element for displaying various information in color by a combination of colors, wherein the corner portion of the color filter is formed so as not to have a right angle portion or an acute angle portion.
りされてなる、 請求項１記載のカラー液晶表示素子。2. The color liquid crystal display element according to claim 1, wherein a corner portion of the color filter is chamfered with R.
範囲である、 ことを特徴とする請求項２記載のカラー液晶表示素子。3. The color liquid crystal display element according to claim 2, wherein a radius of the corner portion is in a range of 3 to 20 μm.
りされてなる、 請求項１記載のカラー液晶表示素子。4. The color liquid crystal display device according to claim 1, wherein a corner portion of the color filter is chamfered.
たってＣ面取りされてなる、 請求項４記載のカラー液晶表示素子。5. The color liquid crystal display element according to claim 4, wherein the corner portion is C-chamfered over a width of 3 to 20 μm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2318095A JP3847806B2 (en) | 1995-02-10 | 1995-02-10 | Color liquid crystal display element |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2318095A JP3847806B2 (en) | 1995-02-10 | 1995-02-10 | Color liquid crystal display element |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08220331A true JPH08220331A (en) | 1996-08-30 |
| JP3847806B2 JP3847806B2 (en) | 2006-11-22 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2318095A Expired - Fee Related JP3847806B2 (en) | 1995-02-10 | 1995-02-10 | Color liquid crystal display element |
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| Country | Link |
|---|---|
| JP (1) | JP3847806B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006126420A (en) * | 2004-10-28 | 2006-05-18 | Quanta Display Japan Inc | Liquid crystal display element |
| JP2008076940A (en) * | 2006-09-25 | 2008-04-03 | Toppan Printing Co Ltd | Cured pattern and method for manufacturing the same, photomask and exposure device |
| US7580095B2 (en) | 2004-10-20 | 2009-08-25 | Sharp Kabushiki Kaisha | Substrate for display device |
-
1995
- 1995-02-10 JP JP2318095A patent/JP3847806B2/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7580095B2 (en) | 2004-10-20 | 2009-08-25 | Sharp Kabushiki Kaisha | Substrate for display device |
| JP2006126420A (en) * | 2004-10-28 | 2006-05-18 | Quanta Display Japan Inc | Liquid crystal display element |
| JP2008076940A (en) * | 2006-09-25 | 2008-04-03 | Toppan Printing Co Ltd | Cured pattern and method for manufacturing the same, photomask and exposure device |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3847806B2 (en) | 2006-11-22 |
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