JPH0822000A - Liquid crystal display - Google Patents
Liquid crystal displayInfo
- Publication number
- JPH0822000A JPH0822000A JP6153741A JP15374194A JPH0822000A JP H0822000 A JPH0822000 A JP H0822000A JP 6153741 A JP6153741 A JP 6153741A JP 15374194 A JP15374194 A JP 15374194A JP H0822000 A JPH0822000 A JP H0822000A
- Authority
- JP
- Japan
- Prior art keywords
- liquid crystal
- crystal display
- display device
- lens film
- lens
- 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 abstract description 47
- 230000005540 biological transmission Effects 0.000 claims abstract description 5
- 239000011159 matrix material Substances 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 description 1
- 229910052601 baryte Inorganic materials 0.000 description 1
- 239000010428 baryte Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- ORQBXQOJMQIAOY-UHFFFAOYSA-N nobelium Chemical compound [No] ORQBXQOJMQIAOY-UHFFFAOYSA-N 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 229920006255 plastic film Polymers 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 1
- 229920005591 polysilicon Polymers 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
Landscapes
- Liquid Crystal (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は液晶表示装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal display device.
【０００２】[0002]
【従来の技術】液晶表示装置、中でも小型液晶表示素子
を用いた電子ビューファインダーはビデオカメラやＨＭ
Ｄ（ヘッド・マウント・ディスプレイ）などの分野で応
用されている。特にアクティブマトリックス方式の液晶
表示素子を用いた液晶表示装置はＣＲＴに遜色のない表
示品位が得られ、小型軽量化が可能で低消費電力のた
め、この分野では多く利用されている。2. Description of the Related Art Liquid crystal display devices, especially electronic viewfinders using small liquid crystal display elements, are used in video cameras and HMs.
It is applied in fields such as D (head mount display). In particular, a liquid crystal display device using an active matrix type liquid crystal display element has a display quality comparable to that of a CRT, can be reduced in size and weight, and has low power consumption, and is therefore widely used in this field.
【０００３】しかし、小型のアクティブマトリックス液
晶表示素子は一般に開口率が低いため透過率が低い。こ
のため、バックライトは高輝度なものが要求される。一
般にバックライトの輝度を上げるには消費電力を大きく
すればよいが、これは低消費電力という液晶表示装置の
利点を損なうことであり好ましい対策ではない。また、
消費電力が大きくなるとバックライトの発熱も多くなる
ので液晶表示素子の表示に悪影響を及ぼしかねない。However, a small active matrix liquid crystal display device generally has a low aperture ratio and therefore a low transmittance. Therefore, a backlight with high brightness is required. Generally, it is sufficient to increase the power consumption to increase the brightness of the backlight, but this is not a preferable measure because it impairs the advantage of the liquid crystal display device of low power consumption. Also,
As the power consumption increases, the backlight also generates more heat, which may adversely affect the display of the liquid crystal display element.
【０００４】そこで、バックライトの拡散光を効率よく
視野角内に集光させて利用することで実質的に輝度を高
めるレンズフィルムの使用が提案されている。Therefore, it has been proposed to use a lens film which substantially enhances the brightness by efficiently collecting and utilizing the diffused light of the backlight within the viewing angle.
【０００５】レンズフィルムはポリカーボネートなどの
プラスチックのフィルムの片側表面に精密で平行なプリ
ズムを付与し、反対面を平滑仕上げにしたもので、既に
商品化され液晶表示装置以外でも幅広い分野で応用され
ている。The lens film is a plastic film such as polycarbonate with a precision parallel prism provided on one surface and a smooth finish on the other surface. There is.
【０００６】従来の液晶表示装置では図２の模式図に示
すようにバックライトの拡散板と液晶表示素子の間に１
枚のレンズフィルムを配置していた。In the conventional liquid crystal display device, as shown in the schematic view of FIG. 2, there is a space between the diffuser plate of the backlight and the liquid crystal display element.
There were a number of lens films arranged.
【０００７】[0007]
【発明が解決しようとする課題】しかし、従来の液晶表
示装置では、レンズフィルム表面のプリズムと垂直方向
の拡散光は視野角内に集光し利用することができるが、
プリズムと水平方向の拡散光は集光しないため、有効利
用することができなかった。このため、光の利用効率が
半減し輝度上昇も低く、レンズフィルムの原理的な効果
を十分には活用していなかった。However, in the conventional liquid crystal display device, the diffused light in the direction perpendicular to the prism on the lens film surface can be condensed and used within the viewing angle.
Since the prism and the diffused light in the horizontal direction are not collected, they cannot be effectively used. Therefore, the efficiency of light utilization is halved and the increase in luminance is low, and the principle effect of the lens film has not been fully utilized.
【０００８】そこで本発明は、このような課題を解決す
るもので、その目的とするところは、高輝度な液晶表示
装置又は消費電力の低い液晶表示装置を提供することに
ある。Therefore, the present invention solves such a problem, and an object of the present invention is to provide a liquid crystal display device with high brightness or a liquid crystal display device with low power consumption.
【０００９】[0009]
【課題を解決するための手段】本発明の液晶表示装置
は、液晶表示素子とバックライトと間にレンズフィルム
を配置してなる液晶表示装置において、上記レンズフィ
ルムが少なくとも２枚のレンズフィルムを該レンズフィ
ルム表面のプリズムの配列方向が直交するように重ねた
もので、かつ、液晶表示素子と対向する上記レンズフィ
ルム表面のプリズムの配列方向を、該液晶表示素子の入
射光側の偏光板の透過軸と平行に配置したことを特徴と
する。A liquid crystal display device according to the present invention is a liquid crystal display device comprising a lens film disposed between a liquid crystal display element and a backlight, wherein the lens film comprises at least two lens films. The prisms on the surface of the lens film are stacked so that the arrangement directions of the prisms are orthogonal to each other, and the arrangement direction of the prisms on the surface of the lens film facing the liquid crystal display element is the same as that of the polarizing plate on the incident light side of the liquid crystal display element. It is characterized in that it is arranged parallel to the axis.
【００１０】[0010]
【実施例】本発明の実施例を図面に基づいて説明する。Embodiments of the present invention will be described with reference to the drawings.
【００１１】図１は本発明の液晶表示装置に於ける液晶
表示装置の模式図である。実施例の液晶表示素子１０１
は対角０．７インチでトライアングル配列の約１０万個
の絵素を有するポリシリコンＴＦＴを用いたビユーファ
インダー用のカラー液晶表示素子である。バックライト
１０４は平面型の蛍光管でインバーター回路で点灯させ
ている。バックライト１０４の発光面は４３００ｃｄ／
ｍ２の輝度があるが、バックライト１０４と液晶表示素
子１０１の組み合わせでは液晶表示面の輝度は１２０ｃ
ｄ／ｍ２である。１０２と１０３はレンズフィルムであ
り、どちらも住友３ＭのＢＥＦ−１００を用いた。レン
ズフィルム１０２はプリズム面を液晶表示素子１０１に
向けて、プリズムの配列方向１０６が液晶表示素子１０
１の入射光側偏光板の透過軸方向１０５と平行になるよ
うに配置した。レンズフィルム１０３はプリズム面をレ
ンズフィルム１０２に向けて、プリズムの配列方向１０
７がレンズフィルム１０２のプリズムの配列方向１０６
と直交するかたちで密着させた。レンズフィルム１０３
の平滑面はバックライト１０４と密着させた。FIG. 1 is a schematic view of a liquid crystal display device in the liquid crystal display device of the present invention. Example liquid crystal display device 101
Is a color liquid crystal display device for a view finder, which uses a polysilicon TFT having a diagonal of 0.7 inches and a triangle arrangement of about 100,000 picture elements. The backlight 104 is a flat fluorescent tube and is turned on by an inverter circuit. The light emitting surface of the backlight 104 is 4300 cd /
there is luminance of m 2 but the brightness of the liquid crystal display surface in combination with the backlight 104 and the liquid crystal display element 101 120c
d / m 2 . Reference numerals 102 and 103 are lens films, and both are BEF-100 of Sumitomo 3M. In the lens film 102, the prism surface faces the liquid crystal display element 101, and the arrangement direction 106 of the prisms is in the liquid crystal display element 10.
It was arranged so as to be parallel to the transmission axis direction 105 of the incident light side polarizing plate of No. 1. The lens film 103 has a prism surface facing the lens film 102, and the prism array direction 10
7 is the arrangement direction 106 of the prisms of the lens film 102.
It was made to adhere in a form orthogonal to. Lens film 103
The smooth surface of No. 1 was in close contact with the backlight 104.
【００１２】このようにして得られた液晶表示装置は表
示面の輝度が約４５％上昇して１７０ｃｄ／ｍ２であっ
た。従来のレンズフィルムを用いたときの液晶表示装置
の輝度の上昇は約３０％であるから、本発明の液晶表示
装置は従来の液晶表示装置よりも輝度の上昇率が約１．
５倍の明るい表示が得られた。In the liquid crystal display device thus obtained, the brightness of the display surface was increased by about 45% to 170 cd / m 2 . Since the increase in the brightness of the liquid crystal display device using the conventional lens film is about 30%, the increase rate of the brightness of the liquid crystal display device of the present invention is about 1.
A 5 times brighter display was obtained.
【００１３】[0013]
【発明の効果】以上説明したように、本発明の液晶表示
装置は、レンズフィルムはプリズムの配列方向が互いに
直交する２枚のレンズフィルムを重ねたものであり、か
つ、該液晶表示素子側のレンズフィルムはプリズムの配
列方向が該液晶表示素子の入射光側の偏光板の透過軸と
平行に配置されてなることを特徴としたため、バックラ
イトの光を効率よく集光することができる。その結果、
従来のレンズフィルムを用いた液晶表示装置よりも明る
い表示が得られる。また、消費電力も少なくすることが
できる。As described above, in the liquid crystal display device of the present invention, the lens film is formed by stacking two lens films in which the arrangement directions of the prisms are orthogonal to each other, and Since the lens film is characterized in that the array direction of the prisms is arranged in parallel with the transmission axis of the polarizing plate on the incident light side of the liquid crystal display element, the light of the backlight can be efficiently condensed. as a result,
A brighter display can be obtained than a conventional liquid crystal display device using a lens film. In addition, power consumption can be reduced.
【図１】 本発明の液晶表示装置の模式図である。FIG. 1 is a schematic view of a liquid crystal display device of the present invention.
【図２】 従来の液晶表示装置の模式図である。FIG. 2 is a schematic view of a conventional liquid crystal display device.
１０１ 液晶表示素子 １０２ レンズフィルム １０３ レンズフィルム １０４ バッライト １０５ 偏光板の透過軸方向 １０６ プリズムの配列方向 １０７ プリズムの配列方向 １０８ 光の進行方向 ２０１ 液晶表示素子 ２０２ レンズフィルム ２０３ バックライト ２０４ 光の進行方向 101 Liquid Crystal Display Element 102 Lens Film 103 Lens Film 104 Barite 105 Transmission Axis Direction of Polarizing Plate 106 Prism Arrangement Direction 107 Prism Arrangement Direction 108 Light Traveling Direction 201 Liquid Crystal Display Element 202 Lens Film 203 Backlight 204 Light Traveling Direction
Claims (1)
ンズフィルムを配置してなる液晶表示装置において、 前記レンズフィルムはプリズムの配列方向が互いに直交
する２枚のレンズフィルムを重ねたものであり、かつ、
該液晶表示素子側のレンズフィルムはプリズムの配列方
向が該液晶表示素子の入射光側の偏光板の透過軸と平行
に配置されてなることを特徴とする液晶表示装置。1. A liquid crystal display device in which a lens film is arranged between a liquid crystal display element and a backlight, wherein the lens film is formed by stacking two lens films in which prisms are arranged in directions orthogonal to each other. ,And,
A liquid crystal display device, wherein the lens film on the liquid crystal display element side is arranged such that the array direction of prisms is parallel to the transmission axis of a polarizing plate on the incident light side of the liquid crystal display element.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15374194A JP3209001B2 (en) | 1994-07-05 | 1994-07-05 | Liquid crystal display |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15374194A JP3209001B2 (en) | 1994-07-05 | 1994-07-05 | Liquid crystal display |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0822000A true JPH0822000A (en) | 1996-01-23 |
| JP3209001B2 JP3209001B2 (en) | 2001-09-17 |
Family
ID=15569099
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15374194A Expired - Lifetime JP3209001B2 (en) | 1994-07-05 | 1994-07-05 | Liquid crystal display |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3209001B2 (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6404468B1 (en) | 1998-07-16 | 2002-06-11 | Mitsubishi Denki Kabushiki Kaisha | Liquid crystal display unit |
| WO2009101746A1 (en) | 2008-02-15 | 2009-08-20 | Sharp Kabushiki Kaisha | Backlight unit and liquid crystal display device |
| WO2009101745A1 (en) | 2008-02-15 | 2009-08-20 | Sharp Kabushiki Kaisha | Liquid crystal display |
| WO2010018812A1 (en) * | 2008-08-12 | 2010-02-18 | 住友化学株式会社 | Optical path unit and liquid crystal display device |
| JP2010156810A (en) * | 2008-12-26 | 2010-07-15 | Dainippon Printing Co Ltd | Optical sheet, surface optical source device and display device |
| JP2010170127A (en) * | 2008-12-26 | 2010-08-05 | Dainippon Printing Co Ltd | Optical sheet, surface light source device, and display device |
| US20100231823A1 (en) * | 2008-12-26 | 2010-09-16 | Dai Nippon Printing Co., Ltd. | Optical sheet, surface light source device, and display device |
| US8305519B2 (en) | 2007-05-29 | 2012-11-06 | Sharp Kabushiki Kaisha | Liquid crystal display device and television receiving apparatus |
-
1994
- 1994-07-05 JP JP15374194A patent/JP3209001B2/en not_active Expired - Lifetime
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6404468B1 (en) | 1998-07-16 | 2002-06-11 | Mitsubishi Denki Kabushiki Kaisha | Liquid crystal display unit |
| US8305519B2 (en) | 2007-05-29 | 2012-11-06 | Sharp Kabushiki Kaisha | Liquid crystal display device and television receiving apparatus |
| WO2009101746A1 (en) | 2008-02-15 | 2009-08-20 | Sharp Kabushiki Kaisha | Backlight unit and liquid crystal display device |
| WO2009101745A1 (en) | 2008-02-15 | 2009-08-20 | Sharp Kabushiki Kaisha | Liquid crystal display |
| WO2010018812A1 (en) * | 2008-08-12 | 2010-02-18 | 住友化学株式会社 | Optical path unit and liquid crystal display device |
| US8508691B2 (en) | 2008-08-12 | 2013-08-13 | Sumitomo Chemical Company, Limited | Optical path unit and liquid crystal display device |
| JP2010156810A (en) * | 2008-12-26 | 2010-07-15 | Dainippon Printing Co Ltd | Optical sheet, surface optical source device and display device |
| JP2010170127A (en) * | 2008-12-26 | 2010-08-05 | Dainippon Printing Co Ltd | Optical sheet, surface light source device, and display device |
| US20100231823A1 (en) * | 2008-12-26 | 2010-09-16 | Dai Nippon Printing Co., Ltd. | Optical sheet, surface light source device, and display device |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3209001B2 (en) | 2001-09-17 |
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