JPH0467016A - Liquid crystal display device - Google Patents
Liquid crystal display deviceInfo
- Publication number
- JPH0467016A JPH0467016A JP2179161A JP17916190A JPH0467016A JP H0467016 A JPH0467016 A JP H0467016A JP 2179161 A JP2179161 A JP 2179161A JP 17916190 A JP17916190 A JP 17916190A JP H0467016 A JPH0467016 A JP H0467016A
- Authority
- JP
- Japan
- Prior art keywords
- liquid crystal
- crystal display
- display device
- light
- 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.)
- Pending
Links
- 239000004973 liquid crystal related substance Substances 0.000 title claims abstract description 69
- 230000003287 optical effect Effects 0.000 claims abstract description 16
- 239000000758 substrate Substances 0.000 claims description 11
- 229920005668 polycarbonate resin Polymers 0.000 abstract description 2
- 239000004431 polycarbonate resin Substances 0.000 abstract description 2
- 239000011521 glass Substances 0.000 description 7
- 230000000694 effects Effects 0.000 description 3
- 239000011159 matrix material Substances 0.000 description 2
- 239000004988 Nematic liquid crystal Substances 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- AMGQUBHHOARCQH-UHFFFAOYSA-N indium;oxotin Chemical compound [In].[Sn]=O AMGQUBHHOARCQH-UHFFFAOYSA-N 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000003566 sealing material Substances 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
Landscapes
- Liquid Crystal (AREA)
Abstract
Description
【発明の詳細な説明】 産業上の利用分野 本発明は、液晶表示装置に関する。[Detailed description of the invention] Industrial applications The present invention relates to a liquid crystal display device.
従来の技術
いわゆるワードプロセッサやバーンナルコンピュータな
どに用いられる薄型表示装置として、液晶表示装置が用
いられている。このような液晶表示装置において、大型
大表示容量のドツトマトリックス型液晶表示装置では、
表示品質の点でスーパーツィステッドネマティック型（
以下、ＳＴＮ型と略す）液晶表示装置が用いられている
。このような大型大表示容量のドツトマトリックス型液
晶表示装置において、背景色を白色とする場合、この白
色の輝度を向上するためにＤＳＴ型く二重のＳＴＮ型液
晶表示を用いる方式）または、ＦＳＴ型（位相差板を用
いる方式）の液晶表示装置を用いている。この場合、液
晶表示装置は透過型であり、背面光源として冷陰極線管
あるいはエトクトロルミネッセンス素子を用いる。2. Description of the Related Art Liquid crystal display devices are used as thin display devices used in so-called word processors, burner computers, and the like. Among such liquid crystal display devices, a dot matrix type liquid crystal display device with a large and large display capacity has
Super twisted nematic type (
A liquid crystal display device (hereinafter abbreviated as STN type) is used. When the background color is white in such a large, large display capacity dot matrix type liquid crystal display device, in order to improve the brightness of this white color, a system using a DST type (DST type) or double STN type liquid crystal display (FST type) or FST type liquid crystal display is used. (a type of liquid crystal display device that uses a retardation plate) is used. In this case, the liquid crystal display device is of a transmission type, and a cold cathode ray tube or an ectoluminescent device is used as a backlight source.
このような典型的な従来例の液晶表示装置１の断面図を
第９図に示し、分解斜視図を第１０図に示す。液晶表示
装置、１は、一対の透明基板２ａ２ｂ間に液晶層が封入
されて成る液晶表示素子２を備え、その表裏には偏光板
３，４が配置される。A sectional view of such a typical conventional liquid crystal display device 1 is shown in FIG. 9, and an exploded perspective view is shown in FIG. 10. The liquid crystal display device 1 includes a liquid crystal display element 2 in which a liquid crystal layer is sealed between a pair of transparent substrates 2a2b, and polarizing plates 3 and 4 are arranged on the front and back sides of the liquid crystal display element 2.
このような液晶表示素子２を背面から照明する光源５，
６は、反射板７上に配置され、反射板７と液晶表示素子
２との間には、光源５，６および反射板７からの光源光
を均一に液晶表示素子２へ伝達するための散乱板８が配
置される。A light source 5 that illuminates such a liquid crystal display element 2 from the back side,
Reference numeral 6 is disposed on a reflection plate 7, and a scattering plate is provided between the reflection plate 7 and the liquid crystal display element 2 to uniformly transmit the source light from the light sources 5, 6 and the reflection plate 7 to the liquid crystal display element 2. A plate 8 is arranged.
発明が解決しようとする課題
上記液晶表示装置１で、背景色の白色の輝度を向上する
にあたって冷陰極線管あるいはエレクトロルミネ・・ｌ
センス素子では、消費電力や発熱量の点で光源光の輝度
を十分高く設定することが困難であった。Problems to be Solved by the Invention In the above liquid crystal display device 1, in order to improve the brightness of the white background color, a cold cathode ray tube or an electroluminescent tube is used.
In the sense element, it has been difficult to set the brightness of the light source to a sufficiently high level in terms of power consumption and heat generation.
本発明の目へは、上述の技術的課題を解消し、表示品質
が向上された液晶表示装置を提供することである。An object of the present invention is to solve the above-mentioned technical problems and provide a liquid crystal display device with improved display quality.
課題を解決するための手段
本発明は、複数の透光性基板間に液晶層を介在して成る
液晶表示素子と、
液晶表示素子の一方側に配置される光源と、液晶表示素
子の前記一方側または他方側の少なくともいずれか一方
に配置され、光源光を予め定める方向に集光させる光学
手段とを含むことを特徴とする液晶表示装置である。Means for Solving the Problems The present invention provides a liquid crystal display element having a liquid crystal layer interposed between a plurality of transparent substrates, a light source disposed on one side of the liquid crystal display element, and a light source disposed on one side of the liquid crystal display element. The liquid crystal display device is characterized in that it includes an optical means disposed on at least one of the side and the other side for condensing light from the light source in a predetermined direction.
作 用
本発明に従う液晶表示装置は、複数の透光性基板間に液
晶層を介在して成る液晶表示素子を備える。この液晶表
示素子の一方側に光源が配置され、液晶表示素子の前記
一方側または他方側の少なくとも、いずれか一方に光源
光を予め定める方向に集光させる光学手段を配置する。Function: The liquid crystal display device according to the present invention includes a liquid crystal display element having a liquid crystal layer interposed between a plurality of transparent substrates. A light source is disposed on one side of the liquid crystal display element, and an optical means for focusing the light from the light source in a predetermined direction is disposed on at least one of the one side and the other side of the liquid crystal display element.
これにより、液晶表示装置を前記予め定める方向付近か
ら見た場合、表示上の輝度は格段に向上され、表示品質
を向上することができる。As a result, when the liquid crystal display device is viewed from near the predetermined direction, the brightness on the display is significantly improved, and the display quality can be improved.
実施例
第１図は本発明の一実施例の液晶表示装置１１の断面図
であり、第２図は液晶表示装置１１の分解斜視図であり
、第３図は液晶表示装置１１に用いられる液晶表示素子
１２の断面図である。液晶表示装置１１は、ＳＴＮ型の
液晶表示素子１２を備えており、この液晶表示素子１２
は透光性を有する一対のガラス基板１３．１４を備え、
各ガラス基板１３．１４上には、相互に直交する方向に
、たとえばＩＴ○（インジウムスズ酸化物）などの透光
性および導電性を有する材料から成る、帯状の透明電極
１５．１６がそれぞれ複数本形成される。Embodiment FIG. 1 is a sectional view of a liquid crystal display device 11 according to an embodiment of the present invention, FIG. 2 is an exploded perspective view of the liquid crystal display device 11, and FIG. 3 is a cross-sectional view of the display element 12. FIG. The liquid crystal display device 11 includes an STN type liquid crystal display element 12.
is equipped with a pair of glass substrates 13 and 14 having translucency,
On each glass substrate 13.14, a plurality of band-shaped transparent electrodes 15.16 made of a translucent and conductive material such as IT○ (indium tin oxide) are arranged in mutually orthogonal directions. The book is formed.
透明電［ｉ１５．１・６を被覆してガラス基板１３゜１
４の全面に亘り、合成樹脂材料がら成る配向膜１７．１
８が形成される。配向ＷＩ！１７．１８間には、たとえ
ばスーパーツィステッドネマティック型の液晶層１９が
封入され、ガラス基板１３，１４の間は、シール材２０
で封止される。Glass substrate 13゜1 coated with transparent electrode [i15.1/6]
Alignment film 17.1 made of a synthetic resin material over the entire surface of 4.
8 is formed. Orientation WI! For example, a super twisted nematic liquid crystal layer 19 is sealed between the glass substrates 17 and 18, and a sealing material 20 is sealed between the glass substrates 13 and 14.
is sealed.
このような液晶表示素子１２におけるガラス基板１３．
１４の相互に反対側表面には、たとえばクロスニコル状
態に、偏光板２１．２２が装着される。このような液晶
表示素子１２に、背面から照射する光源として従来技術
の項で説明したような冷陰極線管あるいはエフトロルミ
ネッセンス素子などの光源２３．２４が用いられ、反射
板２５上に配置される。反射板２５の開口端は、光源２
３．２４および反射板２５からの光を、液晶表示素子１
２に均一な光量分布とするために散乱板２６で被覆され
る。この散乱板２６と液晶表示素子１２との間に、光学
手段２７が配置される。The glass substrate 13 in such a liquid crystal display element 12.
Polarizing plates 21 and 22 are mounted on mutually opposite surfaces of 14, for example in a crossed nicol state. Light sources 23 and 24 such as cold cathode ray tubes or eftroluminescence elements as described in the prior art section are used as light sources for illuminating the liquid crystal display element 12 from the back side, and are arranged on a reflecting plate 25. . The open end of the reflector 25 is connected to the light source 2.
3.24 and the light from the reflection plate 25, the liquid crystal display element 1
2 is coated with a scattering plate 26 to provide a uniform light amount distribution. An optical means 27 is arranged between the scattering plate 26 and the liquid crystal display element 12.
第４図に光学手段２７の拡大断面図を示す、光学手段２
７は、たとえば透光性を有するポリカーボネート樹脂な
どから形成される、略矩形平板状の部材であって、その
一方表面は平坦面２８として構成され、他方側表面はプ
リズム面２９として構成される。すなわち光学手段２７
は、板厚ｔｌ（例として０．３３ｍｍ）の平板部３０と
、平板部３０上に平板部３０と一体的に形成された複数
の相互に平行な突条３１とから成る。各突条３１は、平
板部３０の法線がら角度θ１（例として４５°Ｃ）開い
た平坦側面３２．３３を有し、高さｈｌ（例として０．
１７８ｍｍ）配列ピッチＰＬ（例として０．３５６ｍｍ
）の三角柱状に形成される。したがって光学手段２７の
板厚ｔ２は、例として０．５０８ｍｍに形成される。Optical means 2, an enlarged sectional view of optical means 27 is shown in FIG.
Reference numeral 7 denotes a substantially rectangular plate-like member made of, for example, a translucent polycarbonate resin, one surface of which is configured as a flat surface 28, and the other surface configured as a prism surface 29. That is, the optical means 27
consists of a flat plate portion 30 having a thickness tl (0.33 mm as an example) and a plurality of mutually parallel protrusions 31 formed integrally with the flat plate portion 30 on the flat plate portion 30. Each protrusion 31 has a flat side surface 32,33 that is open at an angle θ1 (for example, 45 degrees Celsius) from the normal line of the flat plate portion 30, and has a height hl (for example, 0 degrees Celsius).
178mm) Array pitch PL (0.356mm as an example)
) is formed in the shape of a triangular prism. Therefore, the plate thickness t2 of the optical means 27 is, for example, 0.508 mm.
このような光学手段２７を用いた液晶表示装置１１に関
して、本件発明者は輝度の視角依存性を測定した。その
結果のグラフを第５図および第６図に示す。第５図は、
液晶表示装置１１の前後方向、すなわち第２図の矢符Ａ
１方向に沿って視角を変化させた場合の輝度の変化を示
し、ライン１１は本実施例に対応し、ライン１２は従来
技術の構成を用いた場合の例である。また第６図は、液
晶表示装置１１の左右方向、すなわち第２図矢符Ａ２方
向に沿って視角を変化させた場合の輝度の変化を示し、
ライン１３は本実施例の場合であり、ライン１４は従来
技術の構成を用いた場合の変化である。Regarding the liquid crystal display device 11 using such an optical means 27, the inventor of the present invention measured the viewing angle dependence of the brightness. Graphs of the results are shown in FIGS. 5 and 6. Figure 5 shows
The front and back direction of the liquid crystal display device 11, that is, the arrow A in FIG.
The graph shows the change in brightness when the viewing angle is changed along one direction, where line 11 corresponds to this embodiment, and line 12 is an example when the configuration of the prior art is used. Further, FIG. 6 shows the change in brightness when the viewing angle is changed in the left-right direction of the liquid crystal display device 11, that is, along the direction of arrow A2 in FIG.
Line 13 is the case of this embodiment, and line 14 is the change when using the configuration of the prior art.
第５図および第６図に示されるように、液晶表示素子１
２の法線方向が最大の輝度を実現し、従来と比較し本実
施例では、約３０％の輝度の向上を実現している。また
法線方向から約土２０°の範囲では、本実施例の液晶表
示装置１１の輝度の方が従来の構成の輝度よりも高いこ
とが把握される。したがって本実施例の液晶表示装置１
１では、背景色を白色とした場合の輝度が格段に向上さ
れ、表示品質を向上している。As shown in FIGS. 5 and 6, a liquid crystal display element 1
The maximum brightness is achieved in the normal direction of No. 2, and compared to the conventional example, this embodiment achieves an approximately 30% improvement in brightness. It is also understood that in a range of about 20 degrees from the normal direction, the brightness of the liquid crystal display device 11 of this embodiment is higher than the brightness of the conventional configuration. Therefore, the liquid crystal display device 1 of this embodiment
In No. 1, the brightness is significantly improved when the background color is white, and the display quality is improved.
第７図は、本発明の他の実施例の液晶表示装置１１ａの
断面図であり、第８図は液晶表示装置１１ａの分解斜視
図である。本実施例は、前述の実施例に類似し、対応す
る部分には同一の参照符を付す。本実施例の注目すべき
点は、液晶表示素子１２に関して、光源２３，２４と反
対側の偏光板２２のさらに外方に前述したような構成の
光学手段２７を配置するようにしていることである。本
件発明者の実験によれば、このようなｌ１ｌＦ＆て・あ
っても前述の実施例て゛述べた効果と同様な効果音達成
て゛きることが確認された。FIG. 7 is a sectional view of a liquid crystal display device 11a according to another embodiment of the present invention, and FIG. 8 is an exploded perspective view of the liquid crystal display device 11a. This embodiment is similar to the previous embodiment, and corresponding parts are given the same reference numerals. What is noteworthy about this embodiment is that, with respect to the liquid crystal display element 12, the optical means 27 having the above-mentioned configuration is arranged further outside the polarizing plate 22 on the side opposite to the light sources 23 and 24. be. According to experiments conducted by the inventor of the present invention, it has been confirmed that even with such l1lF&T, it is possible to achieve the same sound effect as the effect described in the above-mentioned embodiment.
発明の効果
以上のように本発明に従えば、液晶表示素子の一方側に
光源が配置され、液晶表示素子の前記−万態または他方
側の少なくとも、いずれか一方に光源光を予め定める方
向に集光させる光学手段を配置する。これにより、液晶
表示装置を前記予め定める方向付近から見た場合、表示
上の輝度は格段に向上され、表示品質を向上することが
できる９Effects of the Invention As described above, according to the present invention, a light source is arranged on one side of a liquid crystal display element, and the light source light is directed to at least one of the above-mentioned or the other side of the liquid crystal display element in a predetermined direction. Optical means for condensing light is arranged. As a result, when the liquid crystal display device is viewed from near the predetermined direction, the brightness on the display is significantly improved, and the display quality can be improved.
第１図は本発明の一実施例の液晶表示装置１１の断面図
、第２図は液晶表示装置１１の分解斜視図、第３図は液
晶表示素子１２の断面図、第４図は光学手段２７の拡大
断面図、第５図および第６図は本実施例の作用を説明す
るグラフ、第７図は本発明の第２の実施例の液晶表示装
置１１ａの断面図、第８図は液晶表示装置１１ａの分解
斜視図、第９図は典型的な従来の液晶表示装！■の断面
図、第１０図は液晶表示装置１の分解斜視口である。
１１、ｌｌａ 液晶表示装置、１２ 液晶表示素子、
１３．１４・・ガラス基板、２３．２４ 光源、２５
反射板、２７・・光学手段、２９ プリズム面、３１
突条
代理人 弁理士 西教 圭一部
第 １ 図
第２図
第
図
第
図
負度ｅやｅｇｌ
第
区
＆ｏ。
素度θ（唆
第６図
第
図
１１ｈ１０ｒＩＡFIG. 1 is a sectional view of a liquid crystal display device 11 according to an embodiment of the present invention, FIG. 2 is an exploded perspective view of the liquid crystal display device 11, FIG. 3 is a sectional view of a liquid crystal display element 12, and FIG. 4 is an optical means. 27, FIGS. 5 and 6 are graphs explaining the operation of this embodiment, FIG. 7 is a sectional view of the liquid crystal display device 11a of the second embodiment of the present invention, and FIG. The exploded perspective view of the display device 11a, FIG. 9, is a typical conventional liquid crystal display device! The cross-sectional view (2) and FIG. 10 are an exploded perspective view of the liquid crystal display device 1. 11, lla liquid crystal display device, 12 liquid crystal display element,
13.14...Glass substrate, 23.24 Light source, 25
Reflector, 27... Optical means, 29 Prism surface, 31
Project agent Patent attorney Kei Saikyo Part 1 Figure 2 Figure Figure Negative degree e and egl Ward & o. Elementary degree θ (Fig. 6, Fig. 11h10rIA
Claims (1)
子と、 液晶表示素子の一方側に配置される光源と、液晶表示素
子の前記一方側または他方側の少なくともいずれか一方
に配置され、光源光を予め定める方向に集光させる光学
手段とを含むことを特徴とする液晶表示装置。[Scope of Claims] A liquid crystal display element comprising a liquid crystal layer interposed between a plurality of transparent substrates, a light source disposed on one side of the liquid crystal display element, and a light source disposed on one side or the other side of the liquid crystal display element. 1. A liquid crystal display device comprising: an optical means disposed on at least one of the sides and condensing light from a light source in a predetermined direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2179161A JPH0467016A (en) | 1990-07-05 | 1990-07-05 | Liquid crystal display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2179161A JPH0467016A (en) | 1990-07-05 | 1990-07-05 | Liquid crystal display device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0467016A true JPH0467016A (en) | 1992-03-03 |
Family
ID=16061011
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2179161A Pending JPH0467016A (en) | 1990-07-05 | 1990-07-05 | Liquid crystal display device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0467016A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01159379A (en) * | 1987-09-11 | 1989-06-22 | Japan Synthetic Rubber Co Ltd | Formation of film |
| JPH0667004A (en) * | 1992-08-25 | 1994-03-11 | Mitsubishi Rayon Co Ltd | Triangular prism sheet for liquid crystal display device and its manufacture |
| JPH06102507A (en) * | 1992-09-24 | 1994-04-15 | Mitsubishi Rayon Co Ltd | Liquid crystal display device |
| JPH0915596A (en) * | 1995-06-30 | 1997-01-17 | Seikosha Co Ltd | Liquid crystal display device |
| KR100387172B1 (en) * | 1992-09-16 | 2003-08-06 | 가부시끼가이샤 히다치 세이사꾸쇼 | Information display device and liquid crystal display device equipped with a prism plate that effectively emits light within a predetermined range |
| US6633350B2 (en) | 1994-10-21 | 2003-10-14 | Canon Kabushiki Kaisha | Illumination device and display apparatus including same |
| WO2010018811A1 (en) * | 2008-08-12 | 2010-02-18 | 住友化学株式会社 | Illumination device |
| US7683533B2 (en) | 2006-03-31 | 2010-03-23 | Canon Kabushiki Kaisha | Organic electroluminescent device provided with a polarizing plate, a prism member and a phase member in a stacked arrangement |
-
1990
- 1990-07-05 JP JP2179161A patent/JPH0467016A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01159379A (en) * | 1987-09-11 | 1989-06-22 | Japan Synthetic Rubber Co Ltd | Formation of film |
| JPH07122140B2 (en) * | 1987-09-11 | 1995-12-25 | 日本合成ゴム株式会社 | Membrane formation method |
| JPH0667004A (en) * | 1992-08-25 | 1994-03-11 | Mitsubishi Rayon Co Ltd | Triangular prism sheet for liquid crystal display device and its manufacture |
| KR100387172B1 (en) * | 1992-09-16 | 2003-08-06 | 가부시끼가이샤 히다치 세이사꾸쇼 | Information display device and liquid crystal display device equipped with a prism plate that effectively emits light within a predetermined range |
| JPH06102507A (en) * | 1992-09-24 | 1994-04-15 | Mitsubishi Rayon Co Ltd | Liquid crystal display device |
| US6633350B2 (en) | 1994-10-21 | 2003-10-14 | Canon Kabushiki Kaisha | Illumination device and display apparatus including same |
| JPH0915596A (en) * | 1995-06-30 | 1997-01-17 | Seikosha Co Ltd | Liquid crystal display device |
| US7683533B2 (en) | 2006-03-31 | 2010-03-23 | Canon Kabushiki Kaisha | Organic electroluminescent device provided with a polarizing plate, a prism member and a phase member in a stacked arrangement |
| WO2010018811A1 (en) * | 2008-08-12 | 2010-02-18 | 住友化学株式会社 | Illumination device |
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