JP3209001B2 - Liquid crystal display - Google Patents
Liquid crystal displayInfo
- Publication number
- JP3209001B2 JP3209001B2 JP15374194A JP15374194A JP3209001B2 JP 3209001 B2 JP3209001 B2 JP 3209001B2 JP 15374194 A JP15374194 A JP 15374194A JP 15374194 A JP15374194 A JP 15374194A JP 3209001 B2 JP3209001 B2 JP 3209001B2
- Authority
- JP
- Japan
- Prior art keywords
- liquid crystal
- crystal display
- lens film
- display device
- 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.)
- Expired - Lifetime
Links
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.
【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 A liquid crystal display device, in particular, an electronic viewfinder using a small liquid crystal display element is used for a video camera,
It is applied in fields such as D (head mounted display). In particular, a liquid crystal display device using an active matrix type liquid crystal display element is widely used in this field because it has a display quality comparable to that of a CRT, can be reduced in size and weight, and has low power consumption.
【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, small active matrix liquid crystal display devices generally have a low aperture ratio and thus a low transmittance. For this reason, a backlight having high luminance is required. In general, the power consumption may be increased to increase the brightness of the backlight. However, this is not a preferable measure because it impairs the advantage of the liquid crystal display device that the power consumption is low. Also,
When the power consumption increases, the heat generated by the backlight increases, 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。[0004] Therefore, it has been proposed to use a lens film that increases the luminance substantially by efficiently collecting and using 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。[0005] A lens film is a plastic film such as polycarbonate which is provided with a precise parallel prism on one surface and has a smooth finish on the opposite surface, and has already been commercialized and applied to a wide range of fields other than liquid crystal display devices. I have.
【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 a conventional liquid crystal display device, as shown in the schematic diagram of FIG.
There were two lens films.
【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, diffused light in the direction perpendicular to the prism on the lens film surface can be collected and used within the viewing angle.
Since the diffused light in the horizontal direction with respect to the prism was not condensed, it could not be used effectively. For this reason, the light use efficiency has been reduced by half and the increase in luminance has been 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。Accordingly, the present invention is to solve such a problem, and an object of the present invention is to provide a high-brightness liquid crystal display device or a low-power-consumption liquid crystal display device.
【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。According to the present invention, there is provided 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 transmitted through the polarizing plate on the incident light side of the liquid crystal display element. It is characterized by being 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。An embodiment 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 in the liquid crystal display of the present invention. Liquid crystal display element 101 of the embodiment
Is a color liquid crystal display element for a view finder using a polysilicon TFT having a diagonal of 0.7 inches and having about 100,000 picture elements in a triangle arrangement. The backlight 104 is a flat fluorescent tube and is lit 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 denote lens films, both of which use BEF-100 of Sumitomo 3M. The lens film 102 has the prism surface facing the liquid crystal display element 101 and the prism arrangement direction 106 is
The polarizing plate was arranged so as to be parallel to the transmission axis direction 105 of the first incident light side polarizing plate. The lens film 103 has a prism surface facing the lens film 102 and a prism arrangement direction 10.
Reference numeral 7 denotes an arrangement direction 106 of the prism of the lens film 102.
It was adhered in a shape orthogonal to. Lens film 103
Was brought into 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 luminance of the display surface was increased by about 45% to 170 cd / m 2 . Since the increase in luminance of the liquid crystal display device using the conventional lens film is about 30%, the liquid crystal display device of the present invention has a luminance increase rate of about 1.10 compared to the conventional liquid crystal display device.
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 according to the present invention, the lens film is formed by stacking two lens films in which the prism arrangement directions are orthogonal to each other. The lens film is characterized in that the arrangement direction of the prisms is arranged parallel to the transmission axis of the polarizing plate on the incident light side of the liquid crystal display element, so that the light of the backlight can be efficiently collected. as a result,
A brighter display can be obtained than a liquid crystal display device using a conventional lens film. Further, 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 Reference Signs List 101 liquid crystal display element 102 lens film 103 lens film 104 backlight 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
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 平５−341270（ＪＰ，Ａ) 特開 平５−313164（ＪＰ，Ａ) 特開 平５−313156（ＪＰ，Ａ) 特開 平５−188340（ＪＰ，Ａ) 特開 平７−77690（ＪＰ，Ａ) 特開 平７−218911（ＪＰ，Ａ) 特開 平７−270708（ＪＰ，Ａ) 実開 昭57−72475（ＪＰ，Ｕ) 特表 平10−503600（ＪＰ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) G02F 1/13357 ────────────────────────────────────────────────── ─── Continuation of front page (56) References JP-A-5-341270 (JP, A) JP-A-5-313164 (JP, A) JP-A-5-313156 (JP, A) JP-A-5-313156 188340 (JP, A) JP-A-7-77690 (JP, A) JP-A-7-218911 (JP, A) JP-A-7-270708 (JP, A) Japanese Utility Model Publication No. 57-72475 (JP, U) Special Table Hei 10-503600 (JP, A) (58) Field surveyed (Int. Cl. 7 , DB name) G02F 1/13357
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 comprising a lens film disposed between a liquid crystal display element and a backlight, wherein the lens film is formed by stacking two lens films whose prisms are arranged at right angles to each other. ,And,
The liquid crystal display device, wherein the lens film on the liquid crystal display element side has a prism arrangement direction parallel to a transmission axis of a polarizing plate on an 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 JPH0822000A (en) | 1996-01-23 |
| JP3209001B2 true 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) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000035572A (en) | 1998-07-16 | 2000-02-02 | Mitsubishi Electric Corp | Liquid crystal display device |
| US8305519B2 (en) | 2007-05-29 | 2012-11-06 | Sharp Kabushiki Kaisha | Liquid crystal display device and television receiving apparatus |
| EP2249197A4 (en) | 2008-02-15 | 2011-10-26 | Sharp Kk | Backlight unit and liquid crystal display device |
| RU2460106C2 (en) | 2008-02-15 | 2012-08-27 | Шарп Кабусики Кайся | Liquid crystal display device |
| JP2010140006A (en) * | 2008-08-12 | 2010-06-24 | Sumitomo Chemical Co Ltd | Optical path unit and liquid crystal display device |
| US20100231823A1 (en) * | 2008-12-26 | 2010-09-16 | Dai Nippon Printing Co., Ltd. | Optical sheet, surface light 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 |
| JP5293177B2 (en) * | 2008-12-26 | 2013-09-18 | 大日本印刷株式会社 | Optical sheet, surface light source device and display device |
-
1994
- 1994-07-05 JP JP15374194A patent/JP3209001B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0822000A (en) | 1996-01-23 |
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