JPH07151922A - Surface light source device - Google Patents

Surface light source device

Info

Publication number
JPH07151922A
JPH07151922A JP5326083A JP32608393A JPH07151922A JP H07151922 A JPH07151922 A JP H07151922A JP 5326083 A JP5326083 A JP 5326083A JP 32608393 A JP32608393 A JP 32608393A JP H07151922 A JPH07151922 A JP H07151922A
Authority
JP
Japan
Prior art keywords
shaped
dot
light
light source
incident
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
Application number
JP5326083A
Other languages
Japanese (ja)
Inventor
Koichi Matsui
Shinzo Murase
新三 村瀬
弘一 松井
Original Assignee
Meitaku Syst:Kk
株式会社明拓システム
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Meitaku Syst:Kk, 株式会社明拓システム filed Critical Meitaku Syst:Kk
Priority to JP5326083A priority Critical patent/JPH07151922A/en
Publication of JPH07151922A publication Critical patent/JPH07151922A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE:To obtain a liquid crystal back light having high luminance in accordance with the coloring of a liquid crystal display screen. CONSTITUTION:This back light A is provided with an edge light panel 1 having an L-shaped incident end face 11 and is provided with an L-shaped light source 2; a light guiding means 14 of the edge light panel 1 is constituted of an L- shaped dot column 15 arrayed from the incident end face 11 toward the corner of a reflecting end face 12; the unit dot 16 of the L-shaped dot column 15 is a dot hole performing three-dimensional irregular reflection; and the diameter and the depth of the unit dot 16 are changed by every L-shaped dot column 15 or in the column. Thus, the device has the high luminance and high uniformity capable of coping with the coloring of the liquid crystal display screen.

Description

【発明の詳細な説明】Detailed Description of the Invention
【0001】[0001]
【産業上の利用分野】本発明は,液晶バックライト,看
板等に広く用いられる面光源装置に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a surface light source device widely used for liquid crystal backlights, signboards and the like.
【0002】[0002]
【従来の技術】この種面光源装置は,エッジライトパネ
ルの一側又は両側の入射端面に一次光源を臨設し,一次
光源から入射光を供給してエッジライトパネルを光輝さ
せて照明を行うものとされる。
2. Description of the Related Art This type of surface light source device is provided with a primary light source on one or both incident end faces of an edge light panel and supplies the incident light from the primary light source to illuminate the edge light panel for illumination. It is said that
【0003】エッジライトパネルは,例えばアクリル透
明基板に,一次光源離隔方向にドット径を変化させるよ
うに行方向,列方向にドットを配列したドットパタン
を,スクリーン印刷によって印刷配置したものとされ,
一次光源は,入射端面長さに応じた例えば蛍光灯,冷陰
極管等を用いるものとされる。
The edge light panel is, for example, an acrylic transparent substrate on which dot patterns in which dots are arranged in the row direction and the column direction so as to change the dot diameter in the primary light source separation direction are printed and arranged by screen printing.
As the primary light source, for example, a fluorescent lamp, a cold cathode tube, or the like according to the length of the incident end face is used.
【0004】[0004]
【発明が解決しようとする課題】この面照明装置は高い
輝度と均一性とを確保できるものとして実用化され,高
評価されているが,例えば液晶表示面のカラー化等に伴
い,更なる高輝度化が要求されるようになると,必ずし
も充分な輝度とすることはできず,一層の飛躍的な輝度
向上が不可欠である。
This surface illuminator has been put to practical use as a device capable of ensuring high brightness and uniformity, and is highly evaluated. When it becomes necessary to increase the brightness, it is not always possible to achieve sufficient brightness, and it is essential to make a dramatic improvement in brightness.
【0005】本発明はかかる事情に鑑みてなされたもの
で,その解決課題とする処は,飛躍的な輝度向上を実現
し得るようにした面照明装置を提供するにある。
The present invention has been made in view of the above circumstances, and a problem to be solved by the invention is to provide a surface lighting device capable of realizing a dramatic improvement in brightness.
【0006】[0006]
【課題を解決するための手段】上記課題に添って本発明
は,請求項1において,矩形又は方形のエッジライトパ
ネルの隣接2辺をL字状の入射端面として,このL字状
入射端面に,L字状に折曲してなる単一L字状光源を臨
設させるとともにエッジライトパネルの裏面に,導光手
段としてL字状入射端面側から他の端面のコーナーに向
けて等間隔の単位ドットよりなるL字状ドット列を配列
した構成とすることによって高輝度を確保するようにし
たものであり,請求項2において,これらの各L字状ド
ット列を,列内同一寸法を基準とした単位ドットによっ
て構成するとともにL字状一次光源から離れるにつれて
L字状ドット列の上記基準の寸法を増加方向又は増加方
向とその後の減少方向に変化させて,輝度の均一性を確
保するようにしたものであり,請求項3において,この
L字状ドット列を,更に列内方向に向けて単位ドットの
基準の寸法を増加方向等に変化させて,輝度の均一性の
ための調整を施すようにしたものであり,請求項4にお
いて,これらL字状ドット列の単位ドットを微小多数の
ドット孔とし,上記基準の寸法の変化をドット孔と径と
深さの双方について行って,三次元的な導光を行うよう
にしたものであり,また請求項5において,各導光手段
をエッジライトパネルの射出成型によりその裏面に一体
に配設した成型のものとして生産性と精度とを確保する
ようにしたものであり,即ち本発明は,エッジライトパ
ネルの隣接2辺のL字状入射端面に一連且つ近接してL
字状に折曲形成した単一のL字状光源を臨設し,且つエ
ッジライトパネルの裏面に上記L字状入射端面側から他
の2辺の端面コーナーに向けて等間隔に配列した,各等
間隔単位ドット配置のL字状ドット列による導光手段を
配設したことを特徴とする面光源装置(請求項1),導
光手段のL字状ドット列を,それぞれ列内同一寸法を基
準とした単位ドットにより構成し且つL字状入射端面側
から他の2辺の端面コーナーに向けて上記基準の寸法を
変化させて構成したことを特徴とする請求項1の面光源
装置(請求項2),導光手段の所定のL字状ドット列
を,追加的に列内方向に向けて単位ドットの基準の寸法
を変化した調整を施して構成したことを特徴とする請求
項2の面光源装置(請求項3),導光手段の単位ドット
を微小にして多数のドット孔とし,基準の寸法の変化
を,ドット孔の径と深さの双方について行ってなること
を特徴とする請求項2又は3の面光源装置(請求項4)
及び導光手段をエッジライトパネルを射出成型すること
によりエッジライトパネルの裏面に一体に配設したこと
を特徴とする請求項1乃至4の面光源装置(請求項5)
に係り且つこれらをそれぞれ発明の要旨として上記課題
解決の手段としたものである。
According to the present invention, in accordance with claim 1, the two adjacent sides of a rectangular or square edge light panel are L-shaped incident end faces, and the L-shaped incident end faces are provided. , A single L-shaped light source bent into an L-shape is provided as a unit, and units are equally spaced from the L-shaped incident end face side to the corners of other end faces as light guide means on the back surface of the edge light panel. High luminance is ensured by arranging L-shaped dot rows of dots, and in each of these L-shaped dot rows, the same dimension in each row is used as a reference. In order to ensure the uniformity of luminance, the reference size of the L-shaped dot array is changed in the increasing direction or in the increasing direction and then in the decreasing direction with increasing distance from the L-shaped primary light source. did Therefore, in the third aspect, the L-shaped dot row is further adjusted toward the in-row direction by changing the reference size of the unit dot in the increasing direction or the like to adjust the brightness uniformity. According to claim 4, the unit dots of these L-shaped dot rows are made up of a very small number of dot holes, and the above-mentioned reference dimensional changes are carried out for both the dot holes and the diameter and depth, and three-dimensionally. In addition, the productivity and accuracy are ensured by molding each light guide means integrally on the back surface thereof by injection molding of the edge light panel. That is, according to the present invention, the L-shaped incident end faces on the two adjacent sides of the edge light panel are arranged in series and close to each other.
A single L-shaped light source bent in the shape of a letter was provided, and arranged on the back surface of the edge light panel at equal intervals from the L-shaped incident end face side to the other two end face corners. The surface light source device (claim 1) characterized in that the light guide means is arranged by an L-shaped dot row of unit dot arrangement at equal intervals, and the L-shaped dot row of the light guide means has the same size in each row. 2. The surface light source device according to claim 1, wherein the surface light source device comprises a unit dot as a reference, and the reference dimension is changed from the L-shaped incident end face side toward the end face corners of the other two sides. Item 2), wherein a predetermined L-shaped dot row of the light guide means is additionally adjusted by changing the reference dimension of the unit dot toward the in-row direction. Surface light source device (claim 3) And Tsu bets hole, a change in the reference size, the surface light source device according to claim 2 or 3, characterized by comprising performed on both the diameter and the depth of the dot holes (claim 4)
The surface light source device according to any one of claims 1 to 4, wherein the light guide means is integrally formed on the back surface of the edge light panel by injection molding the edge light panel.
The present invention relates to the means for solving the above-mentioned problems as the gist of the invention.
【0007】[0007]
【作用】請求項1にあっては,入射光はL字状入射端面
の各L字状一辺を底辺としてそれぞれ左右方向に直角三
角形をなすようにM状に進行するため,L字状光源から
の入射光はL字状入射端面2辺をそれぞれ底辺としてエ
ッジライトパネルの全面をカバーするとともに相互に複
合することになり,導光手段による高輝度の光輝照明を
行うように作用する。
According to the first aspect of the present invention, since the incident light travels in an M-shape so as to form a right-angled triangle in the left-right direction with each L-shaped side of the L-shaped incident end face as the base, the L-shaped light source The incident lights of 2) cover the entire surface of the edge light panel with the two sides of the L-shaped incident end faces as the bases and are compounded with each other, and act to perform high-luminance bright illumination by the light guide means.
【0008】請求項2及び3にあっては,一次光源離隔
方向及び面内所定部位の入射光の乱反射による導光程度
を調整して,輝度の均一性を確保するように作用する。
According to the second and third aspects of the invention, the degree of guiding light by the diffused reflection of the incident light at the primary light source separation direction and the in-plane predetermined portion is adjusted to ensure the uniformity of brightness.
【0009】請求項4は,スクリーン印刷による導光手
段に対して厚み方向内側に三次元的な導光手段となり,
輝度を向上するように作用する。
According to a fourth aspect of the present invention, a three-dimensional light guide means is formed inside the thickness direction with respect to the light guide means by screen printing.
Acts to improve brightness.
【0010】請求項5は,三次元的な導光手段を高精度
に確保するように作用する。
According to the fifth aspect of the present invention, the three-dimensional light guiding means is secured with high accuracy.
【0011】[0011]
【実施例】以下実施例を示す図面に従って本発明を更に
具体的に説明すれば,図1乃至図7において,Aは液晶
表示面を照明する液晶バックライト,1はエッジライト
パネル,2は一次光源,3は,例えば白色ポリエステル
フィルムによる透光性の拡散シート,4は,例えば低発
泡高反射性の白色低発泡ポリエステルフィルムによる反
射シートを示す。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in more detail with reference to the drawings showing the following embodiments. In FIGS. 1 to 7, A is a liquid crystal backlight for illuminating a liquid crystal display surface, 1 is an edge light panel, and 2 is a primary. A light source, 3 is a translucent diffusion sheet made of, for example, a white polyester film, and 4 is a reflection sheet made of, for example, a low-foaming, highly-reflecting white low-foaming polyester film.
【0012】エッジライトパネル1は,4mm厚にして6
8×87mmの矩形透明基板10の裏面の周縁をやや残し
て63×83mmのエリアに導光手段14を配設したアク
リル透明樹脂の射出成型によって形成したものとしてあ
り,該エッジライトパネル1は,その隣接2辺を鏡面L
字状の入射端面11,他の隣接2辺を同じく鏡面L字状
の反射端面12とし,上記L字状入射端面11のコーナ
ーは,鏡面にして透明の湾曲面又は傾斜面13をなすよ
うに角落しして,入射端面11がその全長に亘り連続す
るようにしてある。
The edge light panel 1 has a thickness of 4 mm and 6
The edge light panel 1 is formed by injection molding of an acrylic transparent resin in which the light guide means 14 is disposed in an area of 63 × 83 mm while leaving a margin of the back surface of the rectangular transparent substrate 10 of 8 × 87 mm. The adjacent two sides are the mirror surface L
The L-shaped incident end face 11 and the other two adjacent sides are similarly mirror-finished L-shaped reflecting end faces 12, and the corners of the L-shaped incident end face 11 are mirror-finished to form a transparent curved surface or inclined surface 13. The entrance end face 11 is made to be continuous over its entire length by being rounded off.
【0013】一次光源2は,細径長尺の冷陰極管のチュ
ーブを中央位置でL字状に折曲形成した単一のL字状光
源を用いたものとしてあり,このL字状光源2を上記エ
ッジライトパネル1のL字状入射端面11に一連且つ近
接して臨設してある。
As the primary light source 2, there is used a single L-shaped light source in which a tube of a cold cathode tube having a small diameter and a long length is bent and formed in an L shape at a central position. Are provided in series in close proximity to the L-shaped incident end surface 11 of the edge light panel 1.
【0014】このときL字状光源2は,必ずしもコーナ
ーを完全のL型になるように直角出しを行うことが一般
に困難であるから,エッジライトパネル1の入射端面1
1に臨設しようとしても,エッジライトパネル1のコー
ナーが障害となり,入射端面11と離れた臨設となっ
て,入射光の供給が非効率,不充分となるが,本例の場
合,上記の如くにエッジライトパネル1のL字状入射端
面11のコーナーを角落ししてあるから,該入射端面1
1長手方向全長に亘り平行且つ可及的に近接するように
L字状光源2の臨設を行うことになり,従ってL字状光
源2のエッジライトパネル1に対する入射光の効率的且
つ充分な供給をなし得ることになる(図7参照)。
At this time, it is generally difficult for the L-shaped light source 2 to make a right angle so that the corners are completely L-shaped. Therefore, the incident end surface 1 of the edge light panel 1 is
1, the corner of the edge light panel 1 becomes an obstacle, and the edge of the edge light panel 1 is separated from the incident end face 11 to make the supply of incident light inefficient and insufficient. In the case of this example, however, as described above, Since the corner of the L-shaped incident end face 11 of the edge light panel 1 is cut off, the incident end face 1
(1) The L-shaped light source 2 is provided so as to be parallel and as close to each other as possible over the entire length in the longitudinal direction. Therefore, the incident light of the L-shaped light source 2 is efficiently and sufficiently supplied to the edge light panel 1. (See FIG. 7).
【0015】エッジライトパネル1の裏面に配設した導
光手段14は,上記L字状入射端面11側から他の2辺
のL字状反射端面12のコーナーに向けて等間隔に配列
した,各等間隔単位ドット16配置のL字状ドット列1
5によるものとしてある。
The light guide means 14 arranged on the back surface of the edge light panel 1 are arranged at equal intervals from the L-shaped incident end face 11 side toward the corners of the other two L-shaped reflection end faces 12. L-shaped dot row 1 with 16 equally spaced unit dots
It is based on 5.
【0016】本例においてL字状ドット列15は,微小
にして多数のドット列を単位ドット16とし,同一径,
深さによる列内同一寸法を基準としてL字状に配置した
ものとし,また各L字状ドット列15は,L字状入射端
面11側からL字状反射端面12のコーナーに向けて,
更に上記基準の寸法を変化させて構成したものとしてあ
り,また所定のL字状ドット列15において,列内方向
に向けて,併せてこれを構成するドット孔による単位ド
ット16の基準の寸法を変化した調整を施したものとし
てある。
In this embodiment, the L-shaped dot array 15 is made into a small number of dot arrays with unit dots 16 having the same diameter,
It is assumed that the L-shaped dot rows 15 are arranged based on the same dimension in the row depending on the depth, and that each L-shaped dot row 15 extends from the L-shaped incident end surface 11 side toward the corner of the L-shaped reflective end surface 12.
Further, the reference size of the unit dot 16 is formed by changing the above-mentioned standard size, and in the predetermined L-shaped dot row 15, the unit size of the unit dot 16 formed by the dot holes also constitutes the row inward direction. It is supposed to have changed adjustments.
【0017】ドット孔による単位ドット16を用いた本
例にあっては,上記寸法の変化を,好ましい態様として
径と深さの双方を同時的に拡大し,必要に応じて縮少す
るようにして行うものとしてあり,この変化により,エ
ッジライトパネル1は,入射光を三次元的に乱反射し
て,その導光を極めて効果的且つ均一に行うようにして
ある。
In the present example using the unit dots 16 formed by the dot holes, the above-mentioned change in dimension is simultaneously enlarged in both diameter and depth as a preferable mode, and is reduced as necessary. Due to this change, the edge light panel 1 diffuses the incident light three-dimensionally and guides the incident light extremely effectively and uniformly.
【0018】即ちL字状光源2によって方形又は矩形の
エッジライトパネル1に供給される入射光は,各L字状
1辺を底辺としてそれぞれ左右方向に直角三角形をなす
ようにM状に進行するので,図4に示す如くに,エッジ
ライトパネル1を対角線で区分すると,A,Cは図上右
と下のL字状入射端面11からの入射光が相互に複合し
て極めて輝度の高い部位,C,Dは右又は下のL字状入
射端面11の一方からの入射光による輝度が得られる部
位であり,従って,A,Bに対してC,Dは輝度が低下
する傾向にあり,またA乃至Dの各部位もL字状光源2
から離隔するにつれて輝度低下の方向のバラツキが生じ
る。
That is, the incident light supplied to the rectangular or rectangular edge light panel 1 by the L-shaped light source 2 travels in an M-shape so as to form a right-angled triangle in the left-right direction with each L-shaped one side as the base. Therefore, as shown in FIG. 4, when the edge light panel 1 is divided by a diagonal line, A and C are portions where the incident lights from the L-shaped incident end faces 11 on the right and the bottom in the figure are combined with each other and have extremely high brightness. , C, D are the parts where the brightness is obtained by the incident light from one of the L-shaped entrance end face 11 on the right or the bottom. Therefore, the brightness of C, D tends to decrease with respect to A, B, Further, each of the parts A to D is also an L-shaped light source 2
There is a variation in the direction of lowering the brightness as the distance from the camera increases.
【0019】そこで図5のように,対角線の交点近傍又
は,これより入反射端面12のコーナー方向に偏位した
点近傍を通るL字状光源2に平行なL字状帯乃至線17
を設定して,上記L字状ドット列15の変化を最大とす
るようにすると,図4に見られる輝度のバラツキが解消
され,輝度の高均一性が得られることになる。また上記
と逆に,これより入射端面11のコ−ナ−方向に偏位し
た点近傍を通る同じくL字状帯乃至線17aを設定し
て,L字状ドット列15の変化を最大とするようにする
と,エッジライトパネル1の中央部分を高輝度とし得
る。
Therefore, as shown in FIG. 5, an L-shaped band or line 17 parallel to the L-shaped light source 2 passing near the intersection of the diagonal lines or near the point deviated in the corner direction of the entrance / reflection end face 12 from this intersection.
Is set to maximize the change in the L-shaped dot array 15, the variation in brightness seen in FIG. 4 is eliminated, and high uniformity in brightness can be obtained. On the contrary to the above, the same L-shaped band or line 17a passing near the point deviated in the corner direction of the incident end face 11 from this is set to maximize the change of the L-shaped dot row 15. By doing so, the central portion of the edge light panel 1 can have high brightness.
【0020】上記L字状ドット列15の,反射端面13
コーナーに向けた変化は,基本的にかかる知見に基づ
き,L字状ドット列15を拡大方向に変化するとともに
その変化の最大,即ちドット孔による単位ドット16の
ピークを,対角線交点のL字状帯乃至線17近傍に設定
し,これをそのまま反射端面13のコーナーに向けて維
持するか,反射端面13のコーナー近傍でやや逆に縮少
方向への変化をなさしめたものである。
The reflection end face 13 of the L-shaped dot row 15
The change toward the corner basically changes the L-shaped dot array 15 in the expansion direction based on the above knowledge, and the maximum of the change, that is, the peak of the unit dot 16 due to the dot hole, is changed to the L-shaped diagonal intersection point. It is set in the vicinity of the band or line 17 and is maintained as it is toward the corner of the reflection end face 13 or is slightly changed in the direction of reduction near the corner of the reflection end face 13.
【0021】このようにL字状ドット列15を変化する
ことは極めて有効であるが,エッジライトパネル1内の
入射光の進行は複雑であるために厳密には,なお輝度の
微妙な差異が生じることになる。これに対応して高度な
均一性を得るようにしたのが,上記L字状ドット列15
のコーナーに向けた変化に加えて行ったL字状ドット列
15の列内方向に向けた単位ドット16の拡大方向への
変化による調整であり,図2,図3はこのような双方の
変化によって得られた高輝度,高均一の導光を行うL字
状ドット列15による導光パタンの一例である。
Although it is extremely effective to change the L-shaped dot row 15 in this manner, since the progress of incident light in the edge light panel 1 is complicated, strictly speaking, there is still a slight difference in brightness. Will occur. Correspondingly to this, a high degree of uniformity is obtained by the above-mentioned L-shaped dot row 15
The adjustment is performed in addition to the change toward the corner of the L-shaped dot row 15 and the adjustment is performed by the change in the unit dot 16 toward the inner direction of the L-shaped dot row 15, and FIGS. 3 is an example of a light guide pattern by the L-shaped dot row 15 that performs high brightness and highly uniform light guide obtained by.
【0022】本例の液晶バックライトを実験してみる
と,L字状光源2を,12V,205.9mA, 2.48
Wの消費電力にして30,000cd/m2 のランプ輝度を
有する上記冷陰極管とし,図2,3のL字状ドット列に
よる導光パタンを有する上記射出成型のエッジライトパ
ネル1を用いることにより,16,200cd/m2 の高輝
度にして極めて均一性に優れた照明を得ることができ
た。これに対して比較のために,一次光源離隔方向にド
ット径を変化させるように行方向,列方向にドットを配
列した従来のドットパタンを同様に射出成型したエッジ
ライトパネルを用い,長辺側一端の入射端面に同一の消
費電力にして33,000cd/m2 のランプ輝度を有する
バー状の冷陰極管を臨設したものの輝度を測定すると
4,000cd/m2 であり,従って上記本例のものは,同
一の消費電力としたとき,冷陰極管の管長さの相違によ
ってランプ輝度がやや低下するも,エッジライトパネル
輝度は,5割以上大幅に向上し,しかも極めて高均一の
照明を行い得るという高輝度,高均一,省エネルギーの
液晶バックライトAが得られたことになる。このため,
本例のものとするとき設定輝度に対して得られる輝度が
高すぎるときは、その分L字状光源2のランプ輝度を小
さくして,省電力化を進めることも可能となる。
When the liquid crystal backlight of this example is tested, the L-shaped light source 2 is 12 V, 205.9 mA, 2.48.
Use the above-mentioned injection-molded edge light panel 1 having the light-conducting pattern of the L-shaped dot rows shown in FIGS. 2 and 3 as the cold cathode tube having W power consumption of 30,000 cd / m 2 of lamp brightness. As a result, it was possible to obtain an illumination having a high brightness of 16,200 cd / m 2 and extremely excellent uniformity. On the other hand, for comparison, an edge light panel was used, in which a conventional dot pattern in which dots were arranged in the row direction and the column direction so as to change the dot diameter in the primary light source separation direction was similarly injection molded, and the long side was used. When the bar-shaped cold-cathode tube having the lamp power of 33,000 cd / m 2 with the same power consumption on the one incident end surface is installed, the brightness is 4,000 cd / m 2 , and therefore the brightness of the above example is the same. In the case of the same power consumption, although the lamp brightness is slightly reduced due to the difference in the length of the cold cathode tube, the edge light panel brightness is significantly improved by 50% or more, and extremely high uniform illumination is performed. This means that the liquid crystal backlight A with high brightness, high uniformity and energy saving is obtained. For this reason,
In the case of the present example, when the brightness obtained with respect to the set brightness is too high, it is possible to reduce the lamp brightness of the L-shaped light source 2 to that extent and promote power saving.
【0023】図8は,他の例を示したもので,例えばT
FTカラー等の如くに中央部分を特に高輝度に照明する
如くにエッジライトパネル1の導光手段14を設定した
例であり,本例にあっては,上記の如くに対角線交点よ
り入射端面11のコーナー方向に偏位した点近傍を通る
上記L字状帯乃至線17aを基準とし,これを含む矩形
形状部位を上記ドット孔とした単位ドット16の拡大方
向変化の最大部分とするように,L字状入射端面11か
ら反射端面12のコーナーに向けた変化をするとともL
字状ドット列15における列内方向への変化を行い,ま
た反射端面12側は縮小方向の変化を行ったものとして
ある。
FIG. 8 shows another example, for example, T
This is an example in which the light guide means 14 of the edge light panel 1 is set so as to illuminate the central portion with particularly high brightness such as FT color. In this example, as described above, the incident end face 11 is formed from the diagonal intersection point. With reference to the L-shaped band or line 17a passing near the point deviated in the corner direction, the rectangular portion including the L-shaped band or line 17a is used as the dot hole so that the maximum change in the expansion direction of the unit dot 16 is made. When changing from the L-shaped incident end face 11 toward the corner of the reflecting end face 12,
It is assumed that the character dot array 15 is changed in the in-row direction, and the reflective end surface 12 side is changed in the reduction direction.
【0024】図9は同じく他の例を示したもので,エッ
ジライトパネル1の2つのL字状端面を,それぞれL字
状入射端面11として,これらに各々L字状光源2を配
置し,上記図4のA及びBの部位を利用してエッジライ
トパネル1とするとともに導光手段14を,上記と同様
のドット孔の単位ドット16によるL字状ドット列15
とし,各L字状入射端面11から他の2辺の入射端面1
1のコーナーに向うようにL字状ドット列15を変化さ
せた導光パタンのものであり,本例にあっては,L字状
光源2を2本とし,導光手段14をこれに合わせたこと
により,前記L字状光源2を1本用いたものの2倍程度
の輝度と高均一性が得られることになり,更に超高輝度
を実現できる。
FIG. 9 also shows another example, in which the two L-shaped end faces of the edge light panel 1 are respectively defined as L-shaped incident end faces 11, and the L-shaped light sources 2 are respectively arranged therein. The edge light panel 1 is formed by utilizing the portions A and B in FIG. 4 described above, and the light guide means 14 is formed into an L-shaped dot row 15 by the unit dots 16 of the dot holes similar to the above.
From each L-shaped incident end face 11 to the other two incident end faces 1
This is a light guide pattern in which the L-shaped dot row 15 is changed so as to face the corner of 1. In this example, there are two L-shaped light sources 2 and the light guide means 14 is adjusted to this. As a result, it is possible to obtain about twice the brightness and high uniformity as compared with the case where one L-shaped light source 2 is used, and it is possible to realize ultra-high brightness.
【0025】なお図中21はL字状光源2のコーナー部
に被嵌し,必要に応じて両端部近傍等に被嵌ことあるク
ッション性を有する軟質ゴム製のL字状光源2保護用の
クッションリングである。
Reference numeral 21 in the drawing is for protecting the L-shaped light source 2 made of soft rubber having a cushioning property which is fitted in the corner portion of the L-shaped light source 2 and may be fitted in the vicinity of both ends as necessary. It is a cushion ring.
【0026】図示した例は以上のとおりとしたが導光手
段の配設を,透明基板に対するスクリーン印刷によって
行うこと,透明基板の流し込み成型や後加工によって行
うこと等が可能である。
Although the illustrated example is as described above, it is possible to dispose the light guiding means by screen printing on the transparent substrate, by casting the transparent substrate or by post-processing.
【0027】導光手段のL字状ドット列における単位ド
ットの変化を,径乃至面積の変化とし又は深さの変化と
して行うこと,入射端面の端部側を部分的に,又は全長
に亘り粗面化すること等も可能である。
The unit dot in the L-shaped dot array of the light guide means is changed as a change in diameter or area or a change in depth, and the end side of the incident end face is partially or entirely roughened. It is also possible to make it face-to-face.
【0028】これらを含めて本発明の実施に当って透明
基板,導光手段,L字状光源等の各具体的材質,形状,
構造,寸法,数,これらに対する付加,面光源装置とし
ての用途等は,前記各発明の要旨に反しない限り様々に
変更でき,以上に図示し説明したものに限定するには及
ばない。
In carrying out the present invention including these, each specific material and shape of the transparent substrate, the light guide means, the L-shaped light source, etc.
The structure, size, number, addition to these, application as a surface light source device, and the like can be variously modified without departing from the gist of each invention, and are not limited to those shown and described above.
【0029】[0029]
【発明の効果】本発明は以上のとおりに構成したので,
作用欄に示した如くに,請求項1は,L字状入射端面か
ら供給される入射光がエッジライトパネルの全面をカバ
ーするとともに相互に複合することになって,極めて優
れて高輝度の光輝照明を行う面光源装置を提供できる。
Since the present invention is configured as described above,
As shown in the action column, the first aspect of the present invention is that the incident light supplied from the L-shaped incident end face covers the entire surface of the edge light panel and is combined with each other. A surface light source device that illuminates can be provided.
【0030】請求項2及び3は,それぞれ同じく上記に
加えて,入射光の乱反射による導光程度を調整して輝度
の均一性を確保することができる。
According to the second and third aspects, in addition to the above, it is possible to secure the uniformity of luminance by adjusting the degree of light guiding by diffuse reflection of incident light.
【0031】請求項4は,同じく上記に加えて厚み方向
内側に三次元的な導光手段とすることができ,輝度を更
に向上することができる。
According to the fourth aspect, in addition to the above, a three-dimensional light guiding means can be provided inside in the thickness direction, and the brightness can be further improved.
【0032】請求項5は,同じく上記に加えて生産を容
易化してエッジライトパネルの均質化を図り,三次元的
な導光手段を高精度に確保して優れた高輝度,高均一化
を実現できる。
According to claim 5, in addition to the above, the production is facilitated to homogenize the edge light panel, and the three-dimensional light guide means is secured with high accuracy to achieve excellent brightness and uniformity. realizable.
【図面の簡単な説明】[Brief description of drawings]
【図1】面光源装置の分解斜視図FIG. 1 is an exploded perspective view of a surface light source device.
【図2】導光手段のパタンを示す平面図FIG. 2 is a plan view showing a pattern of light guide means.
【図3】図2のパタンを拡大したエッジライトパネルと
L字状光源との関係を示す平面図
FIG. 3 is a plan view showing the relationship between the edge light panel and the L-shaped light source in which the pattern of FIG. 2 is enlarged.
【図4】エッジライトパネルと入射光の関係を示す平面
FIG. 4 is a plan view showing a relationship between an edge light panel and incident light.
【図5】導光手段のパタンにおける基準部位を示す平面
FIG. 5 is a plan view showing a reference portion in a pattern of light guide means.
【図6】エッジライトパネルとL字状光源との関係を示
す部分拡大平面図
FIG. 6 is a partially enlarged plan view showing a relationship between an edge light panel and an L-shaped light source.
【図7】単位ドットの変化状態のモデルを示す面光源装
置の縦断面図
FIG. 7 is a vertical cross-sectional view of a surface light source device showing a model of a changed state of unit dots.
【図8】他の例を示す平面図FIG. 8 is a plan view showing another example.
【図9】他の例を示す平面図FIG. 9 is a plan view showing another example.
【符号の説明】[Explanation of symbols]
A 液晶バックライト 1 エッジライトパネル 2 L字状光源 3 拡散シート 4 反射シート 10 透明基板 11 L字状入射端面 14 導光手段 15 L字状ドット列 16 単位ドット A liquid crystal backlight 1 edge light panel 2 L-shaped light source 3 diffusion sheet 4 reflection sheet 10 transparent substrate 11 L-shaped incident end face 14 light guiding means 15 L-shaped dot row 16 unit dot
─────────────────────────────────────────────────────
─────────────────────────────────────────────────── ───
【手続補正書】[Procedure amendment]
【提出日】平成6年3月7日[Submission date] March 7, 1994
【手続補正1】[Procedure Amendment 1]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】0022[Name of item to be corrected] 0022
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
【0022】 本例の液晶バックライトを実験してみる
と,L字状光源2を,12V,205.9mA,2.4
8Wの消費電力にして30,000cd/mのランプ
輝度を有する上記冷陰極管とし,図2,3のL字状ドッ
ト列による導光パタンを有する上記射出成型のエッジラ
イトパネル1を用いることにより,6,200cd/m
の高輝度にして極めて均一性に優れた照明を得ること
ができた。これに対して比較のために,一次光源離隔方
向にドット孔の孔径及び深さを変化させるように行方
向,列方向にドットを配列したドットパタンによる導
光手段を同様に射出成型したエッジライトパネルを用
い,長辺側一端の入射端面に同一の消費電力にして3
3,000cd/mのランプ輝度を有するバー状の冷
陰極管を臨設したものの輝度を測定すると4,000c
d/mであり,従って上記本例のものは,同一の消費
電力としたとき,冷陰極管の管長さの相違によってラン
プ輝度がやや低下するも,エッジライトパネル輝度は,
5割以上大幅に向上し,しかも極めて高均一の照明を行
い得るという高輝度,高均一,省エネルギーの液晶バッ
クライトAが得られたことになる。このため,本例のも
のとするとき設定輝度に対して得られる輝度が高すぎる
ときは、その分L字状光源2のランプ輝度を小さくし
て,省電力化を進めることも可能となる。
When the liquid crystal backlight of this example is tested, the L-shaped light source 2 is 12 V, 205.9 mA, 2.4.
Use the injection-molded edge light panel 1 having the light guide pattern of the L-shaped dot rows of FIGS. 2 and 3 as the cold cathode tube having a lamp brightness of 30,000 cd / m 2 at a power consumption of 8 W. Due to 6,200 cd / m
It was possible to obtain an illumination having a high brightness of 2 and excellent uniformity. For comparison the contrary, the row direction so as to vary the pore size and depth of dots hole in the primary light source spacing direction, guiding the dot pattern having an array of dot holes in the column direction
Using an edge light panel in which the light means is similarly injection-molded, the same power consumption is applied to the incident end face at one end on the long side.
The brightness of a bar-shaped cold-cathode tube having a lamp brightness of 3,000 cd / m 2 was measured to be 4,000 c
d / m 2 , therefore, when the power consumption is the same, the lamp brightness is slightly lowered due to the difference in the length of the cold cathode tubes, but the edge light panel brightness is
This is a liquid crystal backlight A with high brightness, high uniformity and energy saving, which is capable of performing extremely highly uniform illumination by more than 50%. Therefore, in the case of the present example, when the brightness obtained with respect to the set brightness is too high, it is possible to reduce the lamp brightness of the L-shaped light source 2 to that extent and promote power saving.

Claims (5)

    【特許請求の範囲】[Claims]
  1. 【請求項1】 エッジライトパネルの隣接2辺のL字状
    入射端面に一連且つ近接してL字状に折曲形成した単一
    のL字状光源を臨設し,且つエッジライトパネルの裏面
    に上記L字状入射端面側から他の2辺の端面コーナーに
    向けて等間隔に配列した,各等間隔単位ドット配置のL
    字状ドット列による導光手段を配設したことを特徴とす
    る面光源装置。
    1. A single L-shaped light source bent in an L-shape is provided in series in close proximity to the L-shaped incident end faces of two adjacent sides of the edge light panel, and is provided on the back surface of the edge light panel. L of each unit dot arrangement arranged at equal intervals from the L-shaped incident end face side toward the end face corners of the other two sides.
    A surface light source device characterized in that a light guide means is arranged by a character dot array.
  2. 【請求項2】 導光手段のL字状ドット列を,それぞれ
    列内同一寸法を基準とした単位ドットにより構成し且つ
    L字状入射端面側から他の2辺の端面コーナーに向けて
    上記基準の寸法を変化させて構成したことを特徴とする
    請求項1の面光源装置。
    2. The L-shaped dot row of the light guide means is composed of unit dots each having the same size in the row as a reference, and the reference is provided from the L-shaped incident end face side toward the end face corners of the other two sides. The surface light source device according to claim 1, wherein the dimension is changed.
  3. 【請求項3】 導光手段の所定のL字状ドット列を,追
    加的に列内方向に向けて単位ドットの基準の寸法を変化
    した調整を施して構成したことを特徴とする請求項2の
    面光源装置。
    3. A predetermined L-shaped dot array of the light guide means is additionally adjusted by changing the reference size of the unit dot toward the in-row direction. Surface light source device.
  4. 【請求項4】 導光手段の単位ドットを微小にして多数
    のドット孔とし,基準の寸法の変化を,ドット孔の径と
    深さの双方について行ってなることを特徴とする請求項
    2又は3の面光源装置。
    4. The unit dot of the light guide means is made into a small number of dot holes, and the reference dimensions are changed with respect to both the diameter and the depth of the dot holes. 3 surface light source device.
  5. 【請求項5】 導光手段をエッジライトパネルを射出成
    型することによりエッジライトパネルの裏面に一体に配
    設したことを特徴とする請求項1乃至4の面光源装置。
    5. The surface light source device according to claim 1, wherein the light guide means is integrally formed on the back surface of the edge light panel by injection molding the edge light panel.
JP5326083A 1993-11-29 1993-11-29 Surface light source device Pending JPH07151922A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5326083A JPH07151922A (en) 1993-11-29 1993-11-29 Surface light source device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5326083A JPH07151922A (en) 1993-11-29 1993-11-29 Surface light source device

Publications (1)

Publication Number Publication Date
JPH07151922A true JPH07151922A (en) 1995-06-16

Family

ID=18183923

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5326083A Pending JPH07151922A (en) 1993-11-29 1993-11-29 Surface light source device

Country Status (1)

Country Link
JP (1) JPH07151922A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6435686B1 (en) 1999-02-26 2002-08-20 The Ohtsu Tire & Rubber Co., Ltd. Light conducting plate for a back lighting device and back lighting device
JP2008311090A (en) * 2007-06-14 2008-12-25 Citizen Electronics Co Ltd Method of manufacturing light guide plate, light guide plate, back light unit, and display device
JP2011154904A (en) * 2010-01-27 2011-08-11 Denso Corp Dot forming order deciding method
US8477259B2 (en) 2008-10-30 2013-07-02 Hitachi Consumer Electronics Co., Ltd. Liquid crystal display device

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6435686B1 (en) 1999-02-26 2002-08-20 The Ohtsu Tire & Rubber Co., Ltd. Light conducting plate for a back lighting device and back lighting device
JP2008311090A (en) * 2007-06-14 2008-12-25 Citizen Electronics Co Ltd Method of manufacturing light guide plate, light guide plate, back light unit, and display device
US8477259B2 (en) 2008-10-30 2013-07-02 Hitachi Consumer Electronics Co., Ltd. Liquid crystal display device
JP2011154904A (en) * 2010-01-27 2011-08-11 Denso Corp Dot forming order deciding method

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