JP2001250986A - Dot matrix display device - Google Patents
Dot matrix display deviceInfo
- Publication number
- JP2001250986A JP2001250986A JP2000059379A JP2000059379A JP2001250986A JP 2001250986 A JP2001250986 A JP 2001250986A JP 2000059379 A JP2000059379 A JP 2000059379A JP 2000059379 A JP2000059379 A JP 2000059379A JP 2001250986 A JP2001250986 A JP 2001250986A
- Authority
- JP
- Japan
- Prior art keywords
- light emitting
- light
- emitting element
- lens case
- display device
- 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
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
- H01L2224/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
- H01L2224/42—Wire connectors; Manufacturing methods related thereto
- H01L2224/47—Structure, shape, material or disposition of the wire connectors after the connecting process
- H01L2224/48—Structure, shape, material or disposition of the wire connectors after the connecting process of an individual wire connector
- H01L2224/4805—Shape
- H01L2224/4809—Loop shape
- H01L2224/48091—Arched
Landscapes
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
- Transforming Electric Information Into Light Information (AREA)
- Led Device Packages (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、発光素子をマトリ
クス状に配列して、各発光素子を１つのドットとして表
示するドットマトリクス表示装置に関する。さらに詳し
くは、発光素子が周囲に反射壁を有しないチップ型ＬＥ
ＤまたはＬＥＤのベアチップがマウントされる場合で
も、表示パネルの正面側に光を集光させ、正面側にとく
に強い指向特性を有し、輝度の大きい表示装置とするこ
とができる構造のドットマトリクス表示装置に関する。[0001] 1. Field of the Invention [0002] The present invention relates to a dot matrix display device in which light emitting elements are arranged in a matrix and each light emitting element is displayed as one dot. More specifically, a chip-type LE in which a light-emitting element does not have a reflective wall around it.
Even when a D or LED bare chip is mounted, the dot matrix display has a structure in which light is focused on the front side of the display panel, and a display device having particularly strong directional characteristics on the front side and a large luminance can be obtained. Related to the device.
【０００２】[0002]
【従来の技術】従来のドットマトリクス表示装置は、た
とえば図３（ａ）にその一例の断面説明図が示されるよ
うに、表示パネル基板５１の表面側にたとえばチップ型
の発光素子（以下ＬＥＤという）５２がマトリクス状に
並べられ、表示パネル基板５１の裏面に図示しない駆動
回路や、各ＬＥＤ５２への電源供給用端子などが設けら
れ、マトリクス状に並べられたＬＥＤ５２を選択的にオ
ンオフさせることにより、所望の文字や図形を表示する
構成になっている。また、ＬＥＤ５２の表面側には、断
面形状が半円形、または楕円形のレンズケース５４が設
けられることにより、正面側に光を集光して輝度を向上
させる構造にされる場合がある。そして、この表示装置
が何個も縦横に並べられて大型の表示ボードとして、公
共の掲示板などに用いられている。2. Description of the Related Art A conventional dot matrix display device has, for example, a chip type light emitting element (hereinafter referred to as an LED) on the front side of a display panel substrate 51, as shown in FIG. ) 52 are arranged in a matrix, and a drive circuit (not shown), a power supply terminal for each LED 52, and the like are provided on the back surface of the display panel substrate 51, and the LEDs 52 arranged in a matrix are selectively turned on and off. , A desired character or graphic is displayed. In some cases, a lens case 54 having a semicircular or elliptical cross-section is provided on the front surface side of the LED 52, so that light is collected on the front side to improve brightness. A number of such display devices are arranged vertically and horizontally and used as a large display board for a public notice board or the like.
【０００３】前述のレンズケース５４は、その底面が平
坦面で、並べられたＬＥＤ５２の上に載置できる構造で
あるが、図３（ｂ）に示されるようにＬＥＤ５２を囲む
四角状の空洞部が形成される場合もある。The above-mentioned lens case 54 has a flat bottom surface and can be mounted on the LEDs 52 arranged in a line. As shown in FIG. 3 (b), a rectangular cavity surrounding the LEDs 52 is provided. May be formed.
【０００４】[0004]
【発明が解決しようとする課題】前述のドットマトリク
ス表示装置に用いられるＬＥＤ５２が、図３（ａ）に示
されるように、周囲に反射壁５７を有するチップ型ＬＥ
Ｄであれば、ＬＥＤチップ５２ａから横方向に進んだ光
もその反射壁５７により上方に反射されるため、その上
部に設けられたレンズケース５４により集光されて強い
指向性が得られる。しかし、ＬＥＤ５２が反射ケース５
７を有しないチップ型発光素子やチップだけのベアチッ
プの場合、横や斜め方向に進む光は、全発光量の３０〜
４０％程度あるにも拘わらず、これらの光は、レンズケ
ース５４の凸部に入射しないで、全反射して減衰した
り、隣のドット（ＬＥＤ５２）の方に進んで、発光すべ
きでないドットを明るくして妨害をするだけで、本来の
ドットの輝度に何ら寄与しない。そのため、充分に輝度
を向上させることができないという問題がある。As shown in FIG. 3A, the LED 52 used in the above-described dot matrix display device is a chip type LE having a reflective wall 57 around it.
In the case of D, the light traveling in the horizontal direction from the LED chip 52a is also reflected upward by the reflection wall 57, so that the light is collected by the lens case 54 provided above the LED chip 52a, and strong directivity is obtained. However, if the LED 52 is
In the case of a chip type light emitting element having no 7 or a bare chip having only a chip, light traveling in the horizontal or oblique direction is 30 to 30% of the total light emission amount.
Despite being about 40%, these lights do not enter the convex portion of the lens case 54, but are totally reflected and attenuated, or travel to the next dot (LED 52), and do not emit light. Only makes the image brighter and interferes, but does not contribute to the original brightness of the dot. Therefore, there is a problem that the luminance cannot be sufficiently improved.
【０００５】また、図３（ｂ）に示されるように、レン
ズケース５４でＬＥＤ５２を覆い込む構造にしても、そ
のＬＥＤ５２周囲の空洞の構造が、４角形などの垂直面
の組合せでは、充分に光をレンズケース５４内に取り込
むことができないと共に、せっかくレンズケース５４内
に取り込まれても、レンズケース５４内を進んで隣のド
ットの方に進むだけとなり、充分に利用することができ
ない。[0005] Further, as shown in FIG. 3 (b), even when the LED 52 is covered with the lens case 54, the structure of the cavity around the LED 52 is not sufficient when a combination of vertical surfaces such as a square is used. The light cannot be taken into the lens case 54, and even if the light is taken into the lens case 54, the light only travels through the lens case 54 to the next dot and cannot be sufficiently used.
【０００６】本発明は、このような問題を解決するため
になされたもので、反射壁を有しないチップ型発光素子
や、ベアチップのＬＥＤをそのまま用いる場合でも、正
面側にできるだけ多くの光を集光させ、正面側で輝度が
大きく、また、隣のドットに光を漏れにくくして、認識
しやすく表示品質の優れたドットマトリクス表示装置を
提供することを目的とする。The present invention has been made to solve such a problem. Even when a chip-type light emitting element having no reflecting wall or a bare chip LED is used as it is, as much light as possible is collected on the front side. An object of the present invention is to provide a dot-matrix display device that emits light, has high luminance on the front side, and hardly leaks light to adjacent dots, and is easy to recognize and has excellent display quality.
【０００７】[0007]
【課題を解決するための手段】本発明によるドットマト
リクス表示装置は、表示パネル基板と、該表示パネル基
板上にマトリクス状に配列される発光素子と、該発光素
子のそれぞれに一致させて凸部が形成され、該発光素子
の表面側に設けられるレンズケースとからなり、前記レ
ンズケースは、前記凸部の内部に前記発光素子を内包し
得る空洞部を有し、かつ、該空洞部より外周に前記発光
部から横方向に出射する光を前記凸部の方に反射させる
傾斜面を有する空隙部が形成されている。According to the present invention, there is provided a dot matrix display device comprising: a display panel substrate; light emitting elements arranged in a matrix on the display panel substrate; And a lens case provided on the surface side of the light emitting element, wherein the lens case has a hollow portion capable of enclosing the light emitting element inside the convex portion, and has an outer periphery than the hollow portion. A gap having an inclined surface for reflecting light emitted from the light emitting portion in the lateral direction toward the convex portion is formed.
【０００８】この構造にすることにより、レンズケース
が発光素子を覆いこみ、横方向に進む光もレンズケース
内に取り込み、しかもその周囲には、横方向に進んだ光
を凸部方向に反射させる傾斜面を有する空隙部が形成さ
れているため、横方向に進んできた光を効率よく正面側
に反射させることができる。この空隙部は、集光用の凸
部を形成する際の金型の形状を変更するだけで、何ら工
数を増やすことなく簡単に形成することができる。その
ため、発光素子に反射壁を有する高価な発光素子を用い
なくても、集光用のレンズケースに反射用の空隙部を形
成するだけで、発光素子の光を有効に利用することがで
きると共に、隣のドットに紛れ込む光を大幅に減らすこ
とができ、視認特性の優れたドットマトリクス型表示装
置となる。[0008] With this structure, the lens case covers the light emitting element, the light traveling in the lateral direction is also taken into the lens case, and the light traveling in the lateral direction is reflected around the periphery in the convex direction. Since the gap having the inclined surface is formed, the light traveling in the lateral direction can be efficiently reflected to the front side. This gap can be easily formed without changing the man-hour by simply changing the shape of the mold when forming the converging projection. Therefore, the light of the light emitting element can be effectively used by simply forming the gap for reflection in the lens case for condensing without using an expensive light emitting element having a reflecting wall in the light emitting element. In addition, it is possible to greatly reduce the amount of light that enters the adjacent dots, and to provide a dot matrix type display device having excellent visibility characteristics.
【０００９】前記空洞部は、底面が４角形以上の多角形
または円形で、かつ、その側壁が曲面または前記基板の
垂直面に対して中心部側に傾いた傾斜面になるように形
成されることにより、発光素子からの光をレンズケース
内に取り込みやすいため好ましい。The hollow portion is formed such that the bottom surface is a polygon or a circle having a quadrangle or more, and the side wall is a curved surface or an inclined surface inclined toward the center with respect to the vertical surface of the substrate. This is preferable because light from the light emitting element can be easily taken into the lens case.
【００１０】前記空洞部側壁が、平面または前記レンズ
ケース凸部の曲率より大きい曲率となるように形成され
ることにより、レンズケース内に光を取り込みやすく、
かつ、レンズケースから正面側に光を放射しやすいため
好ましい。The cavity side wall is formed so as to have a curvature larger than the curvature of the flat surface or the convex portion of the lens case, so that light can be easily taken into the lens case.
Further, it is preferable because light is easily emitted from the lens case to the front side.
【００１１】[0011]
【発明の実施の形態】つぎに、図面を参照しながら本発
明のドットマトリクス表示装置について説明をする。本
発明によるドットマトリクス表示装置は、図１（ａ）〜
（ｃ）にその一実施形態の斜視図および一部の断面説明
図と、レンズケースの底面側から見た図が示されるよう
に、表示パネル基板１上に発光素子２がマトリクス状に
配列されると共に、その発光素子２のそれぞれに一致さ
せて凸部４１が形成されたレンズケース４が、その発光
素子２の表面側に設けられている。そのレンズケース４
は、凸部４１の内部に前述の発光素子２を内包し得る空
洞部４２を有し、かつ、その空洞部４２より外周に、発
光素子２から横方向に出射する光を前述の凸部４１の方
に反射させる傾斜面４３を有する空隙部４４が形成され
ている。なお、図１で５は、たとえばアルミニウムなど
からなる取付板である。Next, a dot matrix display device of the present invention will be described with reference to the drawings. The dot matrix display device according to the present invention is shown in FIGS.
Light emitting elements 2 are arranged in a matrix on a display panel substrate 1 as shown in (c) of a perspective view and a partial cross-sectional explanatory view of one embodiment and a view as viewed from the bottom side of a lens case. In addition, a lens case 4 in which a convex portion 41 is formed so as to correspond to each of the light emitting elements 2 is provided on the surface side of the light emitting element 2. The lens case 4
Has a hollow portion 42 in which the above-described light emitting element 2 can be included inside the convex portion 41, and emits light emitted laterally from the light emitting element 2 to the outer periphery of the hollow portion 42. A gap portion 44 having an inclined surface 43 that reflects light toward the side is formed. In FIG. 1, reference numeral 5 denotes a mounting plate made of, for example, aluminum.
【００１２】表示パネル基板１は、たとえばアルミコア
基板からなり、その表面に図示しない配線パターンが形
成されており、表面に実装される発光素子２の各電極と
接続される構造になっている。なお、表示パネル基板１
の裏面には、各発光素子のオンオフを制御する制御回路
や、発光素子２を駆動する駆動回路の抵抗などが設けら
れているが、図では省略されている。The display panel substrate 1 is made of, for example, an aluminum core substrate, has a wiring pattern (not shown) formed on the surface thereof, and has a structure connected to each electrode of the light emitting element 2 mounted on the surface. The display panel substrate 1
A control circuit for controlling on / off of each light emitting element, a resistance of a drive circuit for driving the light emitting element 2, and the like are provided on the back surface of the light emitting element, but are omitted in the figure.
【００１３】発光素子２は、たとえば図１（ｂ）に断面
説明図が示されるように、絶縁基板２１の表面の両端部
から側面および裏面にかけて端子電極２２、２３が設け
られており、その一方の電極２２上にＬＥＤチップ２４
がダイボンディングされている。そして、ＬＥＤチップ
２４の他方の電極と第２の端子電極２３との間が金線な
どのワイヤ２５により電気的に接続されている。そし
て、その周囲が透明なエポキシ樹脂などにより被覆さ
れ、表面が平坦なパッケージ２６が形成されることによ
り構成されている。この発光素子２は、この例に示され
るように、反射壁を有しないチップ型発光素子や、ＬＥ
Ｄチップのみのベアチップが、反射壁を有するチップ型
発光素子やランプタイプの発光素子より横方向に進む光
が多く、その光を有効に利用することができるため、効
果が大きい。この発光素子２はその両端部の端子電極２
２、２３がハンダなどにより表示パネル基板１の配線パ
ターン上に電気的に接続されると共に固定されている。The light emitting element 2 is provided with terminal electrodes 22 and 23 from both ends of the front surface of the insulating substrate 21 to the side surface and the rear surface, as shown in the sectional view of FIG. 1B, for example. LED chip 24 on the electrode 22
Are die bonded. The other electrode of the LED chip 24 and the second terminal electrode 23 are electrically connected by a wire 25 such as a gold wire. The package 26 is formed by covering the periphery with a transparent epoxy resin or the like and forming a package 26 having a flat surface. As shown in this example, the light-emitting element 2 is a chip-type light-emitting element having no reflective wall,
A bare chip with only a D chip has more light traveling in the lateral direction than a chip-type light-emitting element or a lamp-type light-emitting element having a reflective wall, and the light can be used effectively, so that the effect is large. This light emitting element 2 has terminal electrodes 2 at both ends.
2 and 23 are electrically connected and fixed on the wiring pattern of the display panel substrate 1 by soldering or the like.
【００１４】この発光素子２が、図１（ａ）に示される
ように、１個のユニットに、たとえば１６×１６個また
は２４×２４個取り付けられている。そして、たとえば
駅の行先表示や公共の掲示板などに使用する大型の表示
ボードを構成する場合、このユニットが多数個１列また
は複数列に並べられて、１個のユニットで１文字を表示
させ、連続的な文字列を順次変化させて表示したり、ま
たはスクロール表示したり、縦横にマトリクス状にユニ
ットを多数個並べて全体で表示をすることにより、大型
の表示ボードが構成される。As shown in FIG. 1A, for example, 16 × 16 or 24 × 24 light emitting elements 2 are attached to one unit. For example, when configuring a large display board used for a destination display of a station, a public bulletin board, or the like, a large number of such units are arranged in one or more columns, and one unit displays one character. A large display board is configured by sequentially changing and displaying a continuous character string, or by scrolling, or by arranging a large number of units in a matrix in a horizontal and vertical direction and displaying the entire unit.
【００１５】レンズケース４は、図１（ｂ）に断面説明
図が示されるように、たとえばアクリルまたはポリカー
ボネートなどからなる板状体の一面側で、発光素子２の
位置に相当する部分に、凸部４１が形成されると共に、
その内部に発光素子２を包含し得るように空洞部４２が
形成されている。さらに、その空洞部４２の外周側に、
空隙部４４が形成されている。As shown in FIG. 1B, the lens case 4 has a convex portion on one side of a plate made of, for example, acrylic or polycarbonate, which corresponds to the position of the light emitting element 2. The portion 41 is formed,
The cavity 42 is formed so that the light emitting element 2 can be included therein. Further, on the outer peripheral side of the hollow portion 42,
A void 44 is formed.
【００１６】凸部４１の形状は、たとえば球形状で各々
の発光素子２をカバーして覆うような形状に形成される
が、完全な球形状でなくても、横に長く、上下に小さい
断面が楕円形状の構造でもよく、中心軸に対してほぼ対
称に形成されておればよい。この凸部４１は光をある程
度集光させる機能を有しているが、光が平行光で入射す
るのではなく、とくに反射壁を有しない発光素子２の表
面では、広い指向性であらゆる方向に光が放射されてお
り、凸部４１に入る光もあらゆる方向に向かって入って
くる。そのため、凸部４１から出る光は完全に中心軸上
に集光しないで、あらゆる方向に出るが、凸レンズ効果
により外側には余り広がらないで、ある程度は集光し、
真正面からでなくて斜め方向から観察する場合でも良好
に視認することができる。The shape of the convex portion 41 is, for example, a spherical shape which covers and covers each light emitting element 2. However, even if the convex portion 41 is not a perfect spherical shape, it is long horizontally and small vertically. May have an elliptical structure, and may be formed substantially symmetrically with respect to the central axis. The convex portion 41 has a function of condensing light to some extent. However, the light does not enter as parallel light, and especially on the surface of the light emitting element 2 having no reflecting wall, a wide directivity is used in all directions. Light is emitted, and light entering the convex portion 41 also enters in all directions. Therefore, the light emitted from the convex portion 41 does not completely converge on the central axis, but exits in all directions, but does not spread much outside due to the convex lens effect, and condenses to some extent.
Even when observing from an oblique direction instead of directly from the front, it can be visually recognized well.
【００１７】レンズケース４の凸部４１が形成された面
と反対面は、前述のように空洞部４２が形成されてい
る。この空洞部４２は、発光素子２を内包すると共に、
発光素子２からの光をできるだけ取り込んで正面側に屈
折させることができるように、その側壁が形成されてい
る。すなわち、レンズケース４の屈折率が１.５９程度
と空気の屈折率１より大きいことにより屈折するため、
正面側に屈折しやすくするように曲率の大きい曲面、ま
たは中心側に傾斜した傾斜面に形成されている。この空
洞部４２の頂面は、図１（ｂ）に示されるように、ほぼ
平面の形状に形成される場合もある。さらに底面の形状
は発光素子２を内包できる構造であればよく、４角形以
上の多角形または円形に形成される。底面が４角形状
で、側壁を曲面にした空洞部４２の形状例が図２に示さ
れている。Ｔが頂面、Ｓが側壁、Ｂが底面をそれぞれ示
す。On the surface opposite to the surface on which the convex portion 41 of the lens case 4 is formed, the hollow portion 42 is formed as described above. The cavity 42 contains the light emitting element 2 and
The side wall is formed so that light from the light emitting element 2 can be taken in as much as possible and refracted toward the front side. That is, since the refractive index of the lens case 4 is about 1.59, which is larger than the refractive index of air 1, it is refracted.
It is formed on a curved surface having a large curvature so as to be easily refracted toward the front side, or an inclined surface inclined toward the center. As shown in FIG. 1B, the top surface of the hollow portion 42 may be formed in a substantially planar shape. Further, the shape of the bottom surface may be any structure as long as the light emitting element 2 can be included therein, and is formed in a polygonal or circular shape of a quadrangle or more. FIG. 2 shows an example of the shape of the hollow portion 42 having a square bottom surface and curved side walls. T indicates a top surface, S indicates a side wall, and B indicates a bottom surface.
【００１８】空洞部４２の周囲に設けられる空隙部４４
は、前述のようにレンズケース４の屈折率が１.５９程
度と空気の１より大きいことを利用して、発光素子２か
ら横方向に出射されてレンズケース４内に取り込まれた
光を全反射させて、正面側に向わせるためのもので、正
面側に全反射をしやすい傾斜面４３となるように形成さ
れている。すなわち、傾斜面４３の基板１とのなす角度
θが、たとえばθ＝６０°程度以下となるように形成さ
れることにより、横方向にきた光を全反射させて正面側
に向わせることができる。この空隙部４４は、隣接する
ドット間に形成され、前述の空洞部４２の底面形状が４
角形状である場合のレンズケース４の一部底面図が図１
（ｃ）に示されるように、格子状に空隙部４４が形成さ
れている。なお、図１（ｃ）でＭは空隙部の頂部を示
し、Ｔ、Ｓ、Ｂは図２と同じ部分を示す。A cavity 44 provided around the cavity 42
Utilizes the fact that the refractive index of the lens case 4 is about 1.59, which is larger than 1 as described above, and the light emitted from the light emitting element 2 in the lateral direction and taken into the lens case 4 is totally used. The light is reflected so as to face the front side, and is formed so as to form an inclined surface 43 on the front side where total reflection is easy. That is, by forming the angle θ between the inclined surface 43 and the substrate 1 to be, for example, about θ = about 60 ° or less, the light coming in the horizontal direction can be totally reflected and directed to the front side. it can. The voids 44 are formed between adjacent dots, and the shape of the bottom surface of the cavity 42 is 4.
FIG. 1 is a partial bottom view of the lens case 4 having a square shape.
As shown in (c), the voids 44 are formed in a lattice shape. In FIG. 1C, M indicates the top of the void, and T, S, and B indicate the same portions as in FIG.
【００１９】このレンズケース４は、アクリル、ポリカ
ーボネート樹脂などを金型に流し込むことにより容易に
製造することができるため、複雑な形状でも、一旦金型
を作製すれば、容易に製造することができる。このレン
ズケース４は、接着剤により表示パネル基板１に固定さ
れてもよいし、レンズケース４にフックを設けて表示パ
ネル基板１と固定する構造、または図示しないカシメピ
ンが設けられたカバーケースをレンズケース４の上から
抑えつけてカシメピンにより固定する構造などにするこ
ともできる。Since the lens case 4 can be easily manufactured by pouring acrylic, polycarbonate resin, or the like into a mold, even a complicated shape can be easily manufactured once the mold is manufactured. . The lens case 4 may be fixed to the display panel substrate 1 by an adhesive, or a structure in which a hook is provided on the lens case 4 and the display case is fixed to the display panel substrate 1, or a cover case provided with caulking pins (not shown) may be used as a lens. It is also possible to adopt a structure in which the case 4 is pressed down from above and fixed by caulking pins.
【００２０】本発明のドットマトリクス表示装置によれ
ば、正面側に光を集光するレンズケースに、横方向に進
む光を正面側に反射させる空隙部が一体に形成されてい
るため、発光素子が反射壁を有しないチップ型発光素子
やベアチップのＬＥＤで、横方向に進む光も、空隙部と
の境界面である傾斜面で反射して、図１（ｂ）に矢印で
示されるように、正面側に光が集まる。その結果、非常
に有効に正面側に光を集光することができ、出力効率が
非常に向上する。しかも、レンズケースは金型で一体に
成形されるため、従来のレンズケースよりコストアップ
になることはなく、発光素子に反射壁を有しない安価な
発光素子を用いながら、輝度の大きいドットマトリクス
表示装置が得られる。According to the dot matrix display device of the present invention, since the lens case for condensing light on the front side is integrally formed with the void for reflecting light traveling in the lateral direction to the front side, the light emitting element Is a chip-type light-emitting device or a bare-chip LED having no reflective wall, and light traveling in the horizontal direction is also reflected on an inclined surface that is a boundary surface with a gap, as shown by an arrow in FIG. Light gathers on the front side. As a result, light can be very effectively focused on the front side, and the output efficiency is greatly improved. Moreover, since the lens case is integrally molded with a mold, the cost is not increased compared to the conventional lens case, and a dot matrix display with a large luminance is used while using an inexpensive light emitting element having no reflective wall as the light emitting element. A device is obtained.
【００２１】[0021]
【発明の効果】本発明によれば、簡単な構造の発光素子
を用いながら、正面側の輝度が大きく、しかも隣接する
ドット間で光の干渉のないドットマトリクス表示装置が
得られる。その結果、駅の行先表示、電光ニュースなど
公共表示を、遠くからもしっかりと認識することができ
る、安価な表示装置となる。According to the present invention, it is possible to obtain a dot matrix display device which has high luminance on the front side and has no light interference between adjacent dots while using a light emitting element having a simple structure. As a result, an inexpensive display device that can securely recognize public displays such as a destination display of a station and lightning news from a distance.
【図１】本発明によるドットマトリクス表示装置の一実
施形態の説明図である。FIG. 1 is an explanatory diagram of one embodiment of a dot matrix display device according to the present invention.
【図２】図１に示されるレンズケースの空洞部の一例を
示す説明図である。FIG. 2 is an explanatory view showing an example of a cavity of the lens case shown in FIG.
【図３】従来のドットマトリクス表示装置の一例を説明
する図である。FIG. 3 is a diagram illustrating an example of a conventional dot matrix display device.
１ 表示パネル基板 ２ 発光素子 ４ レンズケース ４１ 凸部 ４２ 空洞部 ４３ 傾斜面 ４４ 空隙部 DESCRIPTION OF SYMBOLS 1 Display panel board 2 Light emitting element 4 Lens case 41 Convex part 42 Cavity part 43 Slope surface 44 Void part
───────────────────────────────────────────────────── フロントページの続き Ｆターム(参考） 5C058 AA13 AB06 BA05 5C094 AA09 AA10 BA25 CA19 ED11 HA01 5F041 AA03 DA19 DA20 DA44 DA82 DC23 DC83 EE11 EE16 EE23 FF06 5G435 AA01 BB04 CC09 FF03 GG07 ──────────────────────────────────────────────────の Continued on the front page F term (reference) 5C058 AA13 AB06 BA05 5C094 AA09 AA10 BA25 CA19 ED11 HA01 5F041 AA03 DA19 DA20 DA44 DA82 DC23 DC83 EE11 EE16 EE23 FF06 5G435 AA01 BB04 CC09 FF03 GG07
Claims (3)
にマトリクス状に配列される発光素子と、該発光素子の
それぞれに一致させて凸部が形成され、該発光素子の表
面側に設けられるレンズケースとからなり、前記レンズ
ケースは、前記凸部の内部に前記発光素子を内包し得る
空洞部を有し、かつ、該空洞部より外周に前記発光部か
ら横方向に出射する光を前記凸部の方に反射させる傾斜
面を有する空隙部が形成されてなるドットマトリクス表
示装置。1. A display panel substrate, a light emitting element arranged in a matrix on the display panel substrate, and a projection formed so as to correspond to each of the light emitting elements, and provided on a surface side of the light emitting element. A lens case, wherein the lens case has a hollow portion capable of containing the light emitting element inside the convex portion, and emits light laterally emitted from the light emitting portion to an outer periphery of the hollow portion. A dot matrix display device in which a void having an inclined surface that reflects light toward a convex portion is formed.
形または円形で、かつ、その側壁が曲面または前記基板
の垂直面に対して中心部側に傾いた傾斜面になるように
形成されてなる請求項１記載の表示装置。2. The hollow portion is formed such that the bottom surface is a polygon or a circle having a quadrangle or more and the side wall is a curved surface or an inclined surface inclined toward the center with respect to a vertical surface of the substrate. The display device according to claim 1, wherein the display device is provided.
ズケース凸部の曲率より大きい曲率となるように形成さ
れてなる請求項１または２記載の表示装置。3. The display device according to claim 1, wherein the side wall of the hollow portion is formed to have a curvature larger than a curvature of a flat surface or the convex portion of the lens case.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000059379A JP4091233B2 (en) | 2000-03-03 | 2000-03-03 | Dot matrix display |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000059379A JP4091233B2 (en) | 2000-03-03 | 2000-03-03 | Dot matrix display |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2001250986A true JP2001250986A (en) | 2001-09-14 |
| JP4091233B2 JP4091233B2 (en) | 2008-05-28 |
Family
ID=18579837
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000059379A Expired - Fee Related JP4091233B2 (en) | 2000-03-03 | 2000-03-03 | Dot matrix display |
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| Country | Link |
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