JP2001312914A - Surface light source element and display device using the same - Google Patents
Surface light source element and display device using the sameInfo
- Publication number
- JP2001312914A JP2001312914A JP2000129636A JP2000129636A JP2001312914A JP 2001312914 A JP2001312914 A JP 2001312914A JP 2000129636 A JP2000129636 A JP 2000129636A JP 2000129636 A JP2000129636 A JP 2000129636A JP 2001312914 A JP2001312914 A JP 2001312914A
- Authority
- JP
- Japan
- Prior art keywords
- light
- light source
- emission
- control plate
- light guide
- 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
Landscapes
- Liquid Crystal (AREA)
- Planar Illumination Modules (AREA)
- Optical Elements Other Than Lenses (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、パーソナルコンピ
ュータ、コンピュータ用モニタ、ビデオカメラ、テレビ
受信機、カーナビゲーションシステム、広告用看板など
に利用される面光源素子およびこれを用いた直視型の表
示装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a surface light source element used for a personal computer, a computer monitor, a video camera, a television receiver, a car navigation system, an advertising signboard, etc., and a direct-view display device using the same. About.
【０００２】[0002]
【従来の技術】液晶パネルに代表される透過型表示装置
は、面状に光を発するバックライトとドット状に画素が
配置された表示パネルとで構成され、該表示パネルの各
画素の光の透過率がコントロールされることによって文
字および映像が表示される。バックライトとしては、ハ
ロゲンランプ、反射板、レンズ等が組み合わされて出射
光の輝度の分布が制御されるもの、蛍光管が導光体の端
面に設けられ、蛍光管からの光が端面と垂直な面から出
射されるもの、蛍光管が導光体の内部に設けられたもの
（直下型）などが挙げられる。ハロゲンランプを利用し
たバックライトは、高輝度を必要とする液晶プロジェク
タに主に用いられる。一方、導光体を利用したバックラ
イトは薄型化が可能であるため、直視型の液晶ＴＶ、パ
ーソナルコンピュータのディスプレイなどに用いられる
ことが多い。2. Description of the Related Art A transmissive display device typified by a liquid crystal panel is composed of a backlight which emits light in a plane and a display panel in which pixels are arranged in a dot form. Characters and images are displayed by controlling the transmittance. As the backlight, a combination of a halogen lamp, a reflector, a lens, and the like is used to control the luminance distribution of the emitted light. A fluorescent tube is provided on the end face of the light guide, and light from the fluorescent tube is perpendicular to the end face. And a fluorescent tube provided inside the light guide (direct type). A backlight using a halogen lamp is mainly used for a liquid crystal projector requiring high luminance. On the other hand, since a backlight using a light guide can be made thin, it is often used for a direct-view type liquid crystal TV, a display of a personal computer, and the like.
【０００３】[0003]
【発明が解決しようとする課題】液晶ＴＶ、ノートパソ
コンなどに用いられるバックライトでは、消費電力を軽
減すること、および高輝度であることが要求されてい
る。高輝度化を実現することは、冷陰極管などの光源を
増やすことで可能であるが、この方法は消費電力の増加
につながるため実用的ではない。そこで、導光体上にマ
イクロプリズムアレイを配置した構成の面光源素子が提
案されている（ＵＳＰ５，３９６，３５０号等参照）。
ＵＳＰ５，３９６，３５０号におけるマイクロプリズム
アレイは、側壁が平面で構成されているが、このような
形状のマイクロプリズムアレイを用いると、角度分布に
偏りが生じ、十分な特性を得ることができない。In a backlight used for a liquid crystal TV, a notebook personal computer, and the like, it is required to reduce power consumption and to have high luminance. Higher brightness can be realized by increasing the number of light sources such as cold cathode tubes, but this method is not practical because it leads to an increase in power consumption. Therefore, a surface light source element having a configuration in which a microprism array is disposed on a light guide has been proposed (see US Pat. No. 5,396,350).
The microprism array in US Pat. No. 5,396,350 has a flat side wall, but if a microprism array having such a shape is used, the angular distribution is deviated, and sufficient characteristics cannot be obtained.
【０００４】本発明は、上記の課題に鑑みてなされたも
ので、高輝度で、しかも面内の輝度の均一性が高く、光
源と平行な方向の角度分布が広い面光源素子を提供する
ことを目的とする。また、本発明は、この面光源素子を
利用した、高い輝度を有する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-mentioned problems, and has as its object to provide a surface light source element having high luminance, high in-plane luminance uniformity, and a wide angle distribution in a direction parallel to the light source. With the goal. Another object of the present invention is to provide a display device using the surface light source element and having high luminance.
【０００５】[0005]
【課題を解決するための手段】上記の課題を解決する本
発明の面光源素子は、光源と、該光源の周囲に配置され
たリフレクタと、該リフレクタで反射された光源からの
光が少なくとも一つの端面から入射される導光体と、該
導光体の出射面側に配置され、導光体の出射面からの光
を正面方向に向かわせる出射光制御板とを備え、該出射
光制御板の１つの主面には該光源からの光が入射する端
面の方向と同じ方向に延びる複数の凸部が配列され、該
凸部の頂部の全部または一部が該導光体の出射面に密着
しており、当該端面の方向と直交する方向における該出
射光制御板の凸部の断面形状が、頂部よりの曲線と両裾
部よりの直線とから構成されている。上記の曲線は、例
えば、放物線または楕円の一部である。この面光源素子
と透過型表示素子とを組合わせることで表示装置を構成
することができる。According to the present invention, there is provided a surface light source device comprising: a light source; a reflector disposed around the light source; and at least one light reflected from the light source. A light guide that is incident from two end faces, and an emission light control plate that is disposed on the emission surface side of the light guide and directs light from the emission surface of the light guide to the front direction. A plurality of protrusions extending in the same direction as the direction of the end face on which light from the light source is incident are arranged on one main surface of the plate, and all or a part of the tops of the protrusions is formed as an emission surface of the light guide. The cross-sectional shape of the projection of the emission light control plate in a direction orthogonal to the direction of the end face is composed of a curve from the top and a straight line from both skirts. The curve is, for example, a part of a parabola or an ellipse. A display device can be configured by combining the surface light source element and the transmission type display element.
【０００６】[0006]
【発明の実施の形態】図１に本発明の面光源素子の一例
の概略構成図を示す。この面光源素子は両端面に冷陰極
管などの光源１が設けられた導光体２と、導光体２の出
射面からの光を正面方向に向かわせる出射光制御板３と
を備えている。出射光制御板３は導光体２の出射面側に
配置されており、出射光制御板３の入射面には、多数の
凸部４が形成されている。凸部４は１次元パターンであ
り、光源が配置されている側の導光体端面と平行になる
ように凸部の稜線が配置されている。この凸部４の導光
体側先端と導光体の出射面とは、例えば、接着層または
粘着層（図示していない）を介して密着されている。光
源２の周囲には、導光体２の端面側とは反対の方向に進
む光を反射し、導光体２の端面側に進行させるリフレク
タ５が設けられている。端面から導光体１に入射した光
は導光体内を全反射を繰り返しながら伝搬していく。こ
の伝搬光は出射光制御板３の凸部と導光体１の出射面と
の密着部から出射光制御板３に取り込まれる。これによ
り、導光体１内を伝搬する光は密着部から順次、出射光
制御板３に取り出され、取り出された光は出射光制御板
３の凸部内で全反射されながら集光される。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows a schematic configuration diagram of an example of the surface light source element of the present invention. The surface light source element includes a light guide 2 provided with a light source 1 such as a cold cathode tube at both end surfaces, and an emission light control plate 3 for directing light from the emission surface of the light guide 2 to the front. I have. The outgoing light control plate 3 is arranged on the outgoing surface side of the light guide 2, and a large number of convex portions 4 are formed on the incoming surface of the outgoing light control plate 3. The convex portion 4 is a one-dimensional pattern, and the ridge line of the convex portion is arranged so as to be parallel to the end surface of the light guide on the side where the light source is arranged. The light guide-side end of the projection 4 and the emission surface of the light guide are in close contact with each other via, for example, an adhesive layer or an adhesive layer (not shown). A reflector 5 is provided around the light source 2 to reflect light traveling in a direction opposite to the end face side of the light guide 2 and travel toward the end face side of the light guide 2. Light incident on the light guide 1 from the end face propagates in the light guide while repeating total reflection. This propagating light is taken into the emission light control plate 3 from a contact portion between the projection of the emission light control plate 3 and the emission surface of the light guide 1. Thereby, the light propagating in the light guide 1 is sequentially extracted from the contact portion to the emission light control plate 3, and the extracted light is collected while being totally reflected in the projection of the emission light control plate 3.
【０００７】図２に本発明の面光源素子における出射光
制御板の凸部の、光源からの光が入射する端面の方向と
直交する方向における断面形状の一例を示す。本発明の
面光源素子における出射光制御板の凸部は、頂部より
（図２に示す領域Ｂ）の曲線と両裾部より（図２に示す
領域Ａ，Ｃ）の直線とから構成されている。領域Ｂは、
例えば、放物線または楕円の一部である。FIG. 2 shows an example of the cross-sectional shape of the projection of the emission light control plate in the surface light source element of the present invention in the direction perpendicular to the direction of the end face where light from the light source enters. The convex portion of the emission light control plate in the surface light source element of the present invention is composed of a curve from the top (region B shown in FIG. 2) and a straight line from both tails (regions A and C shown in FIG. 2). I have. Region B is
For example, a parabola or part of an ellipse.
【０００８】本発明のように導光体の端面の方向と直交
する方向における出射光制御板の凸部の断面形状が、頂
部よりの曲線と両裾部よりの直線とから構成されている
ことによって、輝度を向上させることができる理由を図
３により説明する。図３（ａ）に示すように、凸部が直
線のみで構成されている場合には、凸部に入射した光線
Ａ，Ｃのうち、凸部の裾部よりに入射した光線Ａは光線
Ｂで示すように正面方向に反射されるが、凸部の頂部よ
りに入射した光線Ｃは、凸部壁面で全反射されて、光線
Ｄのように斜め方向に出射されることが起こる。これに
対して、図３（ｂ）に示すように、頂部よりに曲線部が
存在すると、光線が頂部よりに入射した場合であって
も、光線Ｃに示すように、光線を凸部壁面で複数回全反
射させることができ、正面方向に光線を集中させること
ができる（光線Ｅ）。これによって、輝度を向上させる
ことができる。[0008] As in the present invention, the cross-sectional shape of the projection of the emission light control plate in the direction orthogonal to the direction of the end face of the light guide is composed of a curve from the top and a straight line from both hem portions. FIG. 3 explains the reason why the luminance can be improved. As shown in FIG. 3A, when the convex portion is composed of only a straight line, of the light beams A and C incident on the convex portion, the light beam A incident from the skirt portion of the convex portion is the light beam B As shown by, the light beam C incident from the top of the convex portion is totally reflected by the wall surface of the convex portion and is emitted obliquely like the light beam D. On the other hand, as shown in FIG. 3 (b), when a curved portion exists from the top, even when the light is incident from the top, the light is applied to the convex wall surface as shown by the ray C. The light can be totally reflected a plurality of times, and the light can be concentrated in the front direction (light E). Thereby, the luminance can be improved.
【０００９】各領域の幅を変えた出射光制御板を作製し
て、その光学特性を評価した結果によれば、出射光制御
板の凸部裾部の幅をＷ（μm）で、領域Ａの幅をＷA（μ
m）で、領域Ｂの幅をＷB（μm）で、領域Ｃの幅をＷ
C（μm）でそれぞれ表わしたとき（Ｗ＝ＷA＋ＷB＋
ＷC。図２参照）に、 ０．１２≦ＷA／Ｗ≦０．４４ ０．５６≦ＷB／Ｗ≦０．７６ ０．１２≦ＷC／Ｗ≦０．４４ を満足することが、出射光を効率良く正面方向に向けさ
せることができる点で好ましい。また、図４に示すよう
に、凸部と導光体が接着している長さをＬ（μｍ）で表
わしたとき、 ０．１５≦Ｌ／Ｗ≦０．４ を満足することが、凸部に入射した光線を効率良く出射
させることができる点でより好ましい。凸部高さをＨ
（μｍ）で表わしたとき、 ０．４≦Ｈ／Ｗ≦０．６ を満足することが、やはり凸部に入射した光線を効率良
く出射させることができる点でより好ましい。さらに、 ０．７≦（Ｈ＋ＷB）／Ｗ≦１．２ を満足することが、出射光の出射角度の分布を正面方向
に対して対称にすることができる点でより好ましい。凸
部裾部の幅Ｗは例えば、４０μｍ、凸部の高さは例え
ば、２０μｍである。According to the results of producing an emission light control plate with different widths of the respective regions and evaluating the optical characteristics, the width of the bottom of the convex portion of the emission light control plate is represented by W (μm) and the region A The width of W A (μ
m), the width of the area B is W B (μm), and the width of the area C is W
C (μm) (W = W A + W B +
W C. In FIG. 2), the condition that 0.12 ≦ W A /W≦0.44 0.56 ≦ W B /W≦0.76 0.12 ≦ W C /W≦0.44 is satisfied. Is preferable in that it can be efficiently directed to the front direction. As shown in FIG. 4, when the length of the bonding between the convex portion and the light guide is represented by L (μm), it is satisfied that 0.15 ≦ L / W ≦ 0.4. This is more preferable in that the light beam incident on the portion can be efficiently emitted. The height of the projection is H
When expressed in (μm), it is more preferable that 0.4 ≦ H / W ≦ 0.6 is satisfied, since the light beam incident on the convex portion can be efficiently emitted. Further, it is more preferable that the following condition is satisfied: 0.7 ≦ (H + W B ) /W≦1.2, because the distribution of the emission angle of the emitted light can be made symmetrical with respect to the front direction. The width W of the foot of the projection is, for example, 40 μm, and the height of the projection is, for example, 20 μm.
【００１０】図５に本発明の面光源素子の他の一例の概
略構成図を示す。この面光源素子では導光体の片端面に
光源１が設けられている。その他の構成は図１に示す面
光源素子と同様であり、その詳しい説明を省略する。FIG. 5 is a schematic configuration diagram showing another example of the surface light source element of the present invention. In this surface light source element, a light source 1 is provided on one end surface of a light guide. Other configurations are the same as those of the surface light source element shown in FIG. 1, and a detailed description thereof will be omitted.
【００１１】本発明では、導光体として、例えば厚さが
２〜２０ｍｍ程度で、光源が配置された導光体端面間の
距離が例えば５０〜５００ｍｍであるアクリル板を用い
ることができる（導光体のサイズの一例は、厚さが８ｍ
ｍ、光源が配置される２辺の長さが３００ｍｍ、光源が
配置されない側の２辺の長さが２３０ｍｍである。）。
導光体の成形に用いる樹脂としては、アクリル樹脂の外
にポリカーボネート樹脂、ポリスチレン樹脂等の透明性
に優れるものが挙げられる。In the present invention, an acrylic plate having a thickness of, for example, about 2 to 20 mm and a distance between the end faces of the light guide on which the light source is disposed is, for example, 50 to 500 mm can be used as the light guide (guide). An example of the size of the light body is 8m thick
m, the length of two sides on which the light source is disposed is 300 mm, and the length of the two sides on which the light source is not disposed is 230 mm. ).
Examples of the resin used for molding the light guide include not only acrylic resin but also polycarbonate resin, polystyrene resin and the like having excellent transparency.
【００１２】本発明に利用される出射光制御板表面の凸
部は、熱プレス法、紫外線硬化による２Ｐ法、熱硬化に
よる２Ｐ法、雌金型を用いた射出成形法等によって形成
することができる。出射光制御板の作製に用いるスタン
パは、例えばガラス基板上にネガ型あるいはポジ型の感
光性樹脂をコーティングし、この感光性樹脂をフォトマ
スクを介して露光し、現像後、電鋳を行うことにより作
製することができる。出射光制御板は板状である必要は
なく、シート状であってもよい。板状およびシート状の
何れでも量産性に富むため、安価で大量に製造すること
が可能である。また該出射光制御板の凸部のパターンは
１次元ばかりでなく、２次元的に配置されていても良
い。出射光制御板の光出射面にもマイクロレンズアレイ
が設けられていても良い。出射光制御板は、例えば、厚
さが２００μｍ程度のポリエチレンテレフタレートフィ
ルム上にアクリル系の紫外線硬化型樹脂を厚さが１００
μｍ程度になるように塗布して作製される。The projections on the surface of the emission light control plate used in the present invention can be formed by a hot pressing method, a 2P method using ultraviolet curing, a 2P method using thermal curing, an injection molding method using a female mold, or the like. it can. The stamper used for producing the emission light control plate is, for example, to coat a negative or positive photosensitive resin on a glass substrate, expose the photosensitive resin through a photomask, and perform electroforming after development. Can be produced. The emission light control plate does not need to be plate-shaped, but may be sheet-shaped. Both the plate shape and the sheet shape are rich in mass productivity, so that they can be manufactured inexpensively and in large quantities. The pattern of the projections of the emission light control plate may be arranged not only one-dimensionally but also two-dimensionally. A microlens array may also be provided on the light emission surface of the emission light control plate. The emission light control plate is made of, for example, an acrylic ultraviolet curable resin having a thickness of about 200 μm on a polyethylene terephthalate film having a thickness of about 100 μm.
It is manufactured by coating so as to have a thickness of about μm.
【００１３】上記の通り説明した面光源素子をバックラ
イトとして用い、その出射面に透過型表示素子を設ける
ことで、画像表示装置を構成することができる。この透
過型表示素子としては、ＳＴＮ、ＴＦＴ、ＭＩＮＩなど
の液晶パネルが挙げられる。An image display device can be constructed by using the surface light source element described above as a backlight and providing a transmissive display element on the emission surface. As the transmissive display element, a liquid crystal panel such as an STN, a TFT, and a MINI can be used.
【００１４】[0014]
【発明の効果】本発明によれば、高輝度で、しかも面内
の輝度の均一性が高く、光源と平行な方向の角度分布が
広い面光源素子が得られる。According to the present invention, it is possible to obtain a surface light source element having high luminance, high uniformity of in-plane luminance, and a wide angle distribution in a direction parallel to the light source.
【図１】本発明の面光源素子の１例の概略構成図であ
る。FIG. 1 is a schematic configuration diagram of one example of a surface light source element of the present invention.
【図２】本発明における出射光制御板の一例の拡大断面
図である。FIG. 2 is an enlarged sectional view of an example of an emission light control plate according to the present invention.
【図３】本発明により高輝度が得られる理由を説明する
ための図である。FIG. 3 is a diagram for explaining the reason why high luminance is obtained by the present invention.
【図４】本発明における面光源素子と導光体との接着部
の拡大図である。FIG. 4 is an enlarged view of a bonding portion between a surface light source element and a light guide according to the present invention.
【図５】本発明の面光源素子の他の１例の概略構成図で
ある。FIG. 5 is a schematic configuration diagram of another example of the surface light source element of the present invention.
１…光源 ２…導光体 ３…出射光制御板 ４…凸部 ５…リフレクタ DESCRIPTION OF SYMBOLS 1 ... Light source 2 ... Light guide 3 ... Emission light control board 4 ... Convex part 5 ... Reflector
───────────────────────────────────────────────────── フロントページの続き (72)発明者 浜島 功 茨城県つくば市御幸が丘41番地 株式会社 クラレ内 Ｆターム(参考） 2H042 BA04 BA15 BA20 2H091 FA14Z FA23Z FA42Z FC19 FD06 LA18 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Isao Hamashima, Inventor 41 Miyukigaoka, Tsukuba, Ibaraki Pref. Kuraray Co., Ltd.
Claims (8)
レクタと、該リフレクタで反射された光源からの光が少
なくとも一つの端面から入射される導光体と、該導光体
の出射面側に配置された出射光制御板とを備え、該出射
光制御板の１つの主面には該光源からの光が入射する端
面の方向と同じ方向に延びる複数の凸部が配列され、該
凸部の頂部の全部または一部が該導光体の出射面に密着
しており、当該端面の方向と直交する方向における該出
射光制御板の凸部の断面形状が、頂部よりの曲線と両裾
部よりの直線とから構成されていることを特徴とする面
光源素子。1. A light source, a reflector disposed around the light source, a light guide to which light from the light source reflected by the reflector enters from at least one end face, and an emission surface of the light guide And a plurality of projections extending in the same direction as the direction of the end face on which light from the light source is incident is arranged on one main surface of the emission light control plate. All or a part of the top of the projection is in close contact with the emission surface of the light guide, and the cross-sectional shape of the projection of the emission light control plate in a direction orthogonal to the direction of the end surface is a curve from the top. A surface light source element comprising a straight line from both tails.
請求項１記載の面光源素子。2. The surface light source device according to claim 1, wherein the curve is a part of a parabola or an ellipse.
おける該出射光制御板の凸部裾部の幅をＷ（μｍ）で、
凸部裾部よりの断面が直線の部分の幅をＷA（μｍ）
で、凸部頂部よりの断面が曲線の部分の幅をＷB（μ
ｍ）で、凸部の他方の裾部よりの断面が直線の部分の幅
をＷC（μｍ）でそれぞれ表わしたとき（Ｗ＝ＷA＋ＷB
＋ＷC）、下記の式、 ０．１２≦ＷA／Ｗ≦０．４４ ０．５６≦ＷB／Ｗ≦０．７６ ０．１２≦ＷC／Ｗ≦０．４４ を満足する請求項１または２記載の面光源素子。3. The width of the bottom of the projection of the emission light control plate in a direction orthogonal to the direction of the end face of the light guide is W (μm).
The width of the section where the cross section from the skirt of the projection is straight is W A (μm)
And the cross section from the top of the convex portion has the width of the curved portion as W B (μ
m), the width of a straight line portion whose cross section from the other skirt of the convex portion is represented by W C (μm) (W = W A + W B)
+ W C ), the following formula: 0.12 ≦ W A /W≦0.44 0.56 ≦ W B /W≦0.76 0.12 ≦ W C /W≦0.44. Or the surface light source element according to 2.
おける該出射光制御板の凸部裾部の幅をＷ（μｍ）で、
該出射光制御板の凸部の高さをＨ（μｍ）でそれぞれ表
わしたとき、下記の式、 ０．４≦Ｔ／Ｗ≦０．６ を満足する請求項１ないし３のいずれか１項に記載の面
光源素子。4. A width W (μm) of a bottom of a convex portion of the emission light control plate in a direction orthogonal to a direction of an end face of the light guide,
4. The device according to claim 1, wherein when the height of the convex portion of the emission light control plate is represented by H (μm), the following expression is satisfied: 0.4 ≦ T / W ≦ 0.6. 5. The surface light source device according to any one of the above.
おける該出射光制御板の凸部裾部の幅をＷ（μｍ）で、
該出射光制御板の凸部の高さをＨ（μｍ）で、該出射光
制御板の凸部頂部よりの断面が曲線の部分の幅をＷ
B（μｍ）でそれぞれ表わしたとき、下記の式、 ０．７≦（Ｔ＋ＷB）／Ｗ≦１．２ を満足する請求項１ないし４のいずれか１項に記載の面
光源素子。5. A width W (μm) of a foot of a projection of the emission light control plate in a direction orthogonal to a direction of an end face of the light guide,
The height of the convex portion of the emission light control plate is H (μm), and the width of the curved portion of the cross section from the top of the convex portion of the emission light control plate is W.
The surface light source device according to any one of claims 1 to 4, which satisfies the following expression when expressed in B (μm): 0.7 ≦ (T + W B ) /W≦1.2.
おける該出射光制御板の凸部裾部の幅をＷ（μｍ）で、
該出射光制御板の凸部が該導光体の出射面と密着してい
る部分の幅をＬ（μｍ）で、それぞれ表わしたとき、下
記の式、 ０．１５≦Ｌ／Ｗ≦０．４ を満足する請求項１ないし５のいずれか１項に記載の面
光源素子。6. A width of a skirt portion of the projection of the emission light control plate in a direction orthogonal to a direction of an end surface of the light guide is represented by W (μm).
When the width of the portion where the convex portion of the emission light control plate is in close contact with the emission surface of the light guide is represented by L (μm), the following formula is used: 0.15 ≦ L / W ≦ 0. The surface light source device according to any one of claims 1 to 5, which satisfies (4).
の面光源素子と、透過型表示素子とを組み合せた表示装
置。7. A display device comprising a combination of the surface light source device according to claim 1 and a transmissive display device.
求項７記載の表示装置。8. The display device according to claim 7, wherein said transmission type display element is a liquid crystal panel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000129636A JP4443724B2 (en) | 2000-04-28 | 2000-04-28 | Surface light source element and display device using the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000129636A JP4443724B2 (en) | 2000-04-28 | 2000-04-28 | Surface light source element and display device using the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2001312914A true JP2001312914A (en) | 2001-11-09 |
| JP4443724B2 JP4443724B2 (en) | 2010-03-31 |
Family
ID=18638878
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000129636A Expired - Fee Related JP4443724B2 (en) | 2000-04-28 | 2000-04-28 | Surface light source element and display device using the same |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP4443724B2 (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005005881A1 (en) * | 2003-07-15 | 2005-01-20 | Mitsubishi Rayon Co., Ltd. | Light source device and light deflection element |
| JP2008153106A (en) * | 2006-12-19 | 2008-07-03 | Kuraray Co Ltd | Plane light source element and image display device using the same |
| JP2009266818A (en) * | 2008-04-21 | 2009-11-12 | Fraunhofer Ges | Lighting system and planar light output generating method |
| JP2009289444A (en) * | 2008-05-27 | 2009-12-10 | Sumitomo Bakelite Co Ltd | Optical sheet |
| US7794100B2 (en) | 2006-12-27 | 2010-09-14 | Sony Corporation | Planar light source apparatus, display apparatus and planar illumination method |
| JPWO2019049505A1 (en) * | 2017-09-05 | 2020-10-15 | ソニー株式会社 | Light emitting device and display device |
-
2000
- 2000-04-28 JP JP2000129636A patent/JP4443724B2/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005005881A1 (en) * | 2003-07-15 | 2005-01-20 | Mitsubishi Rayon Co., Ltd. | Light source device and light deflection element |
| US7530719B2 (en) | 2003-07-15 | 2009-05-12 | Tomoyoshi Yamashita | Light source device and light deflection element |
| KR101048201B1 (en) * | 2003-07-15 | 2011-07-08 | 미츠비시 레이온 가부시키가이샤 | Light source device and light deflection element |
| JP2008153106A (en) * | 2006-12-19 | 2008-07-03 | Kuraray Co Ltd | Plane light source element and image display device using the same |
| JP4704326B2 (en) * | 2006-12-19 | 2011-06-15 | 株式会社クラレ | Surface light source element and image display device using the same |
| US7794100B2 (en) | 2006-12-27 | 2010-09-14 | Sony Corporation | Planar light source apparatus, display apparatus and planar illumination method |
| JP2009266818A (en) * | 2008-04-21 | 2009-11-12 | Fraunhofer Ges | Lighting system and planar light output generating method |
| US8264142B2 (en) | 2008-04-21 | 2012-09-11 | Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung E.V. | Illumination apparatus and method of producing a planar light output |
| JP2009289444A (en) * | 2008-05-27 | 2009-12-10 | Sumitomo Bakelite Co Ltd | Optical sheet |
| JPWO2019049505A1 (en) * | 2017-09-05 | 2020-10-15 | ソニー株式会社 | Light emitting device and display device |
| JP7140126B2 (en) | 2017-09-05 | 2022-09-21 | ソニーグループ株式会社 | Light emitting device and display device |
Also Published As
| Publication number | Publication date |
|---|---|
| JP4443724B2 (en) | 2010-03-31 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR20010098838A (en) | Planar light source and display device using the same | |
| JP2004029785A (en) | Multiple display device having optical path shift means | |
| WO2011065052A1 (en) | Planar lighting device and display device having same | |
| JP2003330007A (en) | Display panel, liquid crystal display panel and liquid crystal display device | |
| JP2011082143A (en) | Backlight lighting assembly having coupling clip with diffusion means | |
| JP2000249836A (en) | Surface light source device and its production | |
| JPH10106327A (en) | Surface light source element and display apparatus using the element | |
| JP4443724B2 (en) | Surface light source element and display device using the same | |
| JP2004152496A (en) | Light guide plate | |
| JP2001312915A (en) | Surface light source element and display device using the same | |
| JP2007200736A (en) | Lighting system, electrooptical device and electronic equipment | |
| JP2004152719A (en) | Plane light source element and display device using it | |
| JP4566441B2 (en) | Surface light source element and display device using the same | |
| JP3421603B2 (en) | Light guide plate, surface light source device and display device using the light guide plate | |
| JP2005050789A (en) | Surface light source element and display device using it | |
| KR102344296B1 (en) | Display Device having Multiple Display Panel and Plate-type Optical Member therefor | |
| JP4704326B2 (en) | Surface light source element and image display device using the same | |
| JP4443723B2 (en) | Surface light source element and display device using the same | |
| JP2003021726A (en) | Light guide body and surface light source device and liquid crystal display device both usnig the body | |
| JP4628538B2 (en) | Surface light source element and display device using the same | |
| JP4220327B2 (en) | Surface light source element and display device using the same | |
| JPH10133200A (en) | Liquid crystal display device | |
| JP5138493B2 (en) | Display device | |
| JPH09304624A (en) | Surface light source element | |
| JP2000066030A (en) | Surface light source element |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A621 | Written request for application examination |
Free format text: JAPANESE INTERMEDIATE CODE: A621 Effective date: 20070330 |
|
| A977 | Report on retrieval |
Free format text: JAPANESE INTERMEDIATE CODE: A971007 Effective date: 20090403 |
|
| A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20090414 |
|
| A521 | Written amendment |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20090610 |
|
| TRDD | Decision of grant or rejection written | ||
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20091222 |
|
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 |
|
| A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20100113 |
|
| R150 | Certificate of patent or registration of utility model |
Free format text: JAPANESE INTERMEDIATE CODE: R150 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20130122 Year of fee payment: 3 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20130122 Year of fee payment: 3 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20140122 Year of fee payment: 4 |
|
| LAPS | Cancellation because of no payment of annual fees |