JPH0567811A - Light emitting diode lamp - Google Patents
Light emitting diode lampInfo
- Publication number
- JPH0567811A JPH0567811A JP3255730A JP25573091A JPH0567811A JP H0567811 A JPH0567811 A JP H0567811A JP 3255730 A JP3255730 A JP 3255730A JP 25573091 A JP25573091 A JP 25573091A JP H0567811 A JPH0567811 A JP H0567811A
- Authority
- JP
- Japan
- Prior art keywords
- light emitting
- emitting diode
- diode lamp
- led
- present
- 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
Links
Landscapes
- Led Device Packages (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は発光ダイオードランプ及
びそのランプを用いて構成される表示パネルに関する。
さらに詳しくは、中心部の輝度が周縁部のそれよりも高
められている発光ダイオードランプ及びそのランプを用
いて構成される表示パネルに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a light emitting diode lamp and a display panel including the lamp.
More specifically, the present invention relates to a light emitting diode lamp in which the brightness of the central portion is higher than that of the peripheral portion and a display panel including the lamp.
【０００２】[0002]
【従来の技術】従来より広視角用ランプとして、図６に
示すような円柱形発光ダイオードランプ（以下、単にＬ
ＥＤともいう）が用いられている。かかるＬＥＤにおい
ては、光線は周辺部に分散し中心部の輝度が周辺部と同
程度になるため（図７参照）、ＬＥＤの発光面が小さく
見えるという問題がある。なお、図６中の矢印は光線の
進行方向を示す。2. Description of the Related Art Conventionally, as a wide viewing angle lamp, a cylindrical light emitting diode lamp (hereinafter, simply referred to as L
(Also referred to as ED) is used. In such an LED, since the light rays are dispersed to the peripheral portion and the brightness of the central portion is almost the same as that of the peripheral portion (see FIG. 7), there is a problem that the light emitting surface of the LED looks small. In addition, the arrow in FIG. 6 shows the advancing direction of a light ray.
【０００３】また、かかるＬＥＤを用いて表示パネルを
形成した場合、表示された文字が細く見えるという問題
もある。Further, when a display panel is formed by using such LEDs, there is a problem that displayed characters look thin.
【０００４】[0004]
【発明が解決しようとする課題】本発明はかかる従来技
術の問題点に鑑みなされたもので、広視角を維持しなが
ら中心部の輝度が周辺部よりも高められたＬＥＤを提供
することを目的とする。SUMMARY OF THE INVENTION The present invention has been made in view of the above problems of the prior art, and an object thereof is to provide an LED in which the brightness of the central portion is higher than that of the peripheral portion while maintaining a wide viewing angle. And
【０００５】また本発明は、中心部の輝度が周辺部より
も高められたＬＥＤを用いることにより、表示された文
字が細く見えるという従来技術の問題点が解消された表
示パネルを提供することも目的とする。Further, the present invention also provides a display panel which solves the problem of the prior art that displayed characters look thin by using an LED in which the brightness of the central part is higher than that of the peripheral part. To aim.
【０００６】[0006]
【課題を解決するための手段】本発明の発光ダイオード
ランプは、円柱形発光ダイオードランプであって、頂部
平面近傍の円柱部が所定の曲率でもってレンズ面に形成
されていることを特徴としている。The light emitting diode lamp of the present invention is a cylindrical light emitting diode lamp, characterized in that the cylindrical portion near the top plane is formed on the lens surface with a predetermined curvature. ..
【０００７】また、本発明の表示パネルは、円柱形発光
ダイオードランプであって、頂部平面近傍の円柱部が所
定の曲率でもってレンズ面に形成されている発光ダイオ
ードランプを用いてなることを特徴としている。Further, the display panel of the present invention is a columnar light emitting diode lamp, wherein the columnar portion in the vicinity of the top plane is formed on the lens surface with a predetermined curvature. I am trying.
【０００８】[0008]
【作用】本発明のＬＥＤにおいては、頂部平面近傍の円
柱部が所定の曲率でもってレンズ面に形成されているの
で、周辺部から分散する光線が減少し中心部の輝度が周
縁部のそれよりも高くすることができる。In the LED of the present invention, since the cylindrical portion near the top plane is formed on the lens surface with a predetermined curvature, the light rays scattered from the peripheral portion are reduced and the brightness of the central portion is lower than that of the peripheral portion. Can also be higher.
【０００９】また、本発明の表示パネルにおいては、周
辺部から分散する光線を減少させ中心部の輝度が周縁部
のそれよりも高めているＬＥＤを用いているので、表示
された文字が細く見えることはない。Further, since the display panel of the present invention uses the LED in which the light rays scattered from the peripheral portion are reduced and the brightness of the central portion is higher than that of the peripheral portion, the displayed characters look thin. There is no such thing.
【００１０】[0010]
【実施例】以下添付図面を参照しながら本発明の実施例
について説明するが、本発明はかかる実施例のみに限定
されるものではない。Embodiments of the present invention will be described below with reference to the accompanying drawings, but the present invention is not limited to these embodiments.
【００１１】図１は本発明のＬＥＤの一実施例の概略
図、図２は本発明の他の実施例の説明図である。図にお
いて、１は発光ダイオード、２はカバー、３は電極、Ｏ
は発光点である。FIG. 1 is a schematic view of an embodiment of the LED of the present invention, and FIG. 2 is an explanatory view of another embodiment of the present invention. In the figure, 1 is a light emitting diode, 2 is a cover, 3 is an electrode, O
Is a light emitting point.
【００１２】発光ダイオード１及び電極３は従来と同様
であるので、その詳細な説明は省略する。Since the light emitting diode 1 and the electrode 3 are the same as the conventional ones, detailed description thereof will be omitted.
【００１３】カバー２は、図１〜２に示すごとく、頂部
平面近傍の円柱部が所定の曲率でもってレンズ面２１に
形成されている。この所定の曲率は、カバー２の材質や
屈折率を考慮して適宜決定される。例えばエポキシ樹脂
（屈折率ｎ＝１．５４）の場合、発光点Ｏと頂部平面端
部とを結んだ線と円柱の中心線とのなす角が約４０度に
なるような曲率でレンズ面２１に形成する。曲率をこの
ように選定するのは、４０度を超えると図２の点線で示
すように、全反射が生じ発光点からの光が頂部平面から
外に出なくなるので、このようなことが発生することを
避けるためである。As shown in FIGS. 1 and 2, the cover 2 is formed on the lens surface 21 with a cylindrical portion near the top plane having a predetermined curvature. The predetermined curvature is appropriately determined in consideration of the material and the refractive index of the cover 2. For example, in the case of epoxy resin (refractive index n = 1.54), the lens surface 21 has a curvature such that the angle formed by the line connecting the light emitting point O and the top flat end and the center line of the cylinder is about 40 degrees. To form. The reason why the curvature is selected in this way is that when the angle exceeds 40 degrees, total reflection occurs and the light from the light emitting point does not go out from the top plane as shown by the dotted line in FIG. This is to avoid that.
【００１４】ちなみに、本発明のＬＥＤは円柱形ＬＥＤ
の頂部近傍を所定曲率で研削することにより、またはい
わゆるレンズ形ＬＥＤの頂部を切断することにより作製
することができる。By the way, the LED of the present invention is a cylindrical LED.
It can be manufactured by grinding the vicinity of the top of the LED with a predetermined curvature or by cutting the top of a so-called lens-shaped LED.
【００１５】つぎに、このように構成されたＬＥＤの輝
度特性を計測した。結果を図３に示す。図３より明らか
なように、本発明のＬＥＤにおいては、中心部の輝度が
周辺部より高くなっているのがわかる。なお、図４は本
発明のＬＥＤの発光状態を示す模式図である。図４にお
いて、斜線を施した部分は発光部を示す。Next, the luminance characteristic of the LED thus constructed was measured. Results are shown in FIG. As is clear from FIG. 3, in the LED of the present invention, the brightness of the central portion is higher than that of the peripheral portion. Note that FIG. 4 is a schematic diagram showing a light emitting state of the LED of the present invention. In FIG. 4, a shaded portion indicates a light emitting portion.
【００１６】なお、発光部がこのように見えるのは、図
２より明らかなように頂部平面部から出る光は端部方向
に向かって屈折してＬＥＤから放射され、一方円柱部か
ら出る光もレンズ面２１の屈折作用により、従来のもの
よりより一層端部方向に屈折してＬＥＤから放射される
ためである（図２及び図６参照）。As is apparent from FIG. 2, the light emitting portion looks like this. The light emitted from the top flat portion is refracted toward the end portion and emitted from the LED, while the light emitted from the cylindrical portion is also emitted. This is because due to the refraction of the lens surface 21, the light is further refracted in the end direction and emitted from the LED as compared with the conventional one (see FIGS. 2 and 6).
【００１７】図５は本発明のＬＥＤを用いた表示パネル
の概略図である。この表示パネルにおいては、中心部と
周縁部に発光部が存在するので、広視角を維持している
にもかかわらず垂直方向から見た場合でも文字が細く見
えることはない。この表示パネルの駆動機構は従来と同
様であるので、その図示説明は省略する。FIG. 5 is a schematic view of a display panel using the LED of the present invention. In this display panel, since the light emitting portions are present in the central portion and the peripheral portion, the characters do not look thin even when viewed from the vertical direction even though the wide viewing angle is maintained. Since the drive mechanism of this display panel is the same as the conventional one, the illustration and description thereof will be omitted.
【００１８】本発明のＬＥＤを用いたときの効果は、大
型セグメントディスプレイに適用した場合、より一層顕
著になる。すなわち、大型セグメントディスプレイに適
用した場合、より均一な発光面が得られる。これは大型
セグメントディスプレイにおいては、中心部と周縁部と
が一体となって見えることによる。The effect of using the LED of the present invention becomes more remarkable when applied to a large segment display. That is, when applied to a large segment display, a more uniform light emitting surface can be obtained. This is because, in a large-sized segment display, the central portion and the peripheral portion can be seen integrally.
【００１９】[0019]
【発明の効果】以上説明したように、本発明によれば垂
直方向より見た場合の発光面積が大きな、すなわち広視
角の発光ダイオードランプが得られる。また、本発明の
発光ダイオードランプを用いた表示パネルにおいては、
均一な発光面が得られる。As described above, according to the present invention, it is possible to obtain a light emitting diode lamp having a large light emitting area when viewed from the vertical direction, that is, a wide viewing angle. Further, in the display panel using the light emitting diode lamp of the present invention,
A uniform light emitting surface can be obtained.
【図１】本発明のＬＥＤの一実施例の概略図である。FIG. 1 is a schematic view of an embodiment of an LED of the present invention.
【図２】本発明のＬＥＤの他の実施例の説明図である。FIG. 2 is an explanatory view of another embodiment of the LED of the present invention.
【図３】本発明のＬＥＤの一実施例の輝度特性を示すグ
ラフである。FIG. 3 is a graph showing the luminance characteristics of an example of the LED of the present invention.
【図４】本発明のＬＥＤの発光状態を示す模式図であ
る。FIG. 4 is a schematic diagram showing a light emitting state of the LED of the present invention.
【図５】本発明のＬＥＤを用いた表示パネルの概略図で
ある。FIG. 5 is a schematic view of a display panel using the LED of the present invention.
【図６】従来の円柱形ＬＥＤの概略図である。FIG. 6 is a schematic view of a conventional cylindrical LED.
【図７】従来の円柱形ＬＥＤの輝度特性を示すグラフで
ある。FIG. 7 is a graph showing the luminance characteristics of a conventional cylindrical LED.
１ 発光ダイオード ２ カバー 21 レンズ面 ３ 電極 Ｏ 発光点 1 Light emitting diode 2 Cover 21 Lens surface 3 Electrode O Light emitting point
Claims (2)
頂部平面近傍の円柱部が所定の曲率でもってレンズ面に
形成されていることを特徴とする発光ダイオードラン
プ。1. A cylindrical light emitting diode lamp comprising:
A light-emitting diode lamp, wherein a cylindrical portion near the top plane is formed on the lens surface with a predetermined curvature.
用いてなることを特徴とする表示パネル。2. A display panel comprising the light emitting diode lamp according to claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3255730A JPH0567811A (en) | 1991-09-07 | 1991-09-07 | Light emitting diode lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3255730A JPH0567811A (en) | 1991-09-07 | 1991-09-07 | Light emitting diode lamp |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0567811A true JPH0567811A (en) | 1993-03-19 |
Family
ID=17282839
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3255730A Pending JPH0567811A (en) | 1991-09-07 | 1991-09-07 | Light emitting diode lamp |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0567811A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002055632A (en) * | 2000-08-08 | 2002-02-20 | Matsushita Electric Ind Co Ltd | Light-emitting display device |
| JP2014082506A (en) * | 2004-10-18 | 2014-05-08 | Samsung Display Co Ltd | Light-emitting diode and lens therefor |
-
1991
- 1991-09-07 JP JP3255730A patent/JPH0567811A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002055632A (en) * | 2000-08-08 | 2002-02-20 | Matsushita Electric Ind Co Ltd | Light-emitting display device |
| JP2014082506A (en) * | 2004-10-18 | 2014-05-08 | Samsung Display Co Ltd | Light-emitting diode and lens therefor |
| US9200778B2 (en) | 2004-10-18 | 2015-12-01 | Samsung Display Co., Ltd. | Light emitting diode and lens for the same |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A02 | Decision of refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A02 Effective date: 20000404 |