JPH04188680A - Led luminous display element - Google Patents
Led luminous display elementInfo
- Publication number
- JPH04188680A JPH04188680A JP2313673A JP31367390A JPH04188680A JP H04188680 A JPH04188680 A JP H04188680A JP 2313673 A JP2313673 A JP 2313673A JP 31367390 A JP31367390 A JP 31367390A JP H04188680 A JPH04188680 A JP H04188680A
- Authority
- JP
- Japan
- Prior art keywords
- reflective surface
- reflective
- led
- display element
- light
- 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
- 230000001788 irregular Effects 0.000 abstract 2
- 239000003086 colorant Substances 0.000 description 5
- 239000000758 substrate Substances 0.000 description 1
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
-
- 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
- H01L2224/484—Connecting portions
- H01L2224/48463—Connecting portions the connecting portion on the bonding area of the semiconductor or solid-state body being a ball bond
- H01L2224/48465—Connecting portions the connecting portion on the bonding area of the semiconductor or solid-state body being a ball bond the other connecting portion not on the bonding area being a wedge bond, i.e. ball-to-wedge, regular stitch
Landscapes
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
- Led Device Packages (AREA)
Abstract
Description
【発明の詳細な説明】
〈産業上の利用分野〉
本発明は、ＬＥＤ発光表示素子、特に複数個のＬ Ｅ
Ｄチップを用いるＬＥＤ発光表示素子に関する。[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to an LED light emitting display element, particularly a plurality of LED light emitting display elements.
The present invention relates to an LED light emitting display element using a D chip.
〈従来の技術〉
複数のＬＥＤチップを搭載する従来のＬＥＤ発光表示素
子について第２図〜第４図を参照しつつ説明する。<Prior Art> A conventional LED light emitting display element equipped with a plurality of LED chips will be described with reference to FIGS. 2 to 4.
ＬＥＤ発光表示素子は、第４図に示すように、基板３０
の上面に略播鉢状の反射ケース２ｏを形成し、当該反射
ケース２０の底面２２にＬＥＤチップ１ｏを搭載して構
成されている。The LED light emitting display element has a substrate 30 as shown in FIG.
A substantially pot-shaped reflection case 2o is formed on the top surface of the reflection case 20, and an LED chip 1o is mounted on the bottom surface 22 of the reflection case 20.
かかるＬＥＤ発光表示素子には、単色発光のタイプと複
数色の光を任意に発光することが可能なタイプとがある
。Such LED light emitting display elements include a type that emits monochrome light and a type that can emit light of multiple colors arbitrarily.
複数色の光を発光することができるＬＥＤ発光表示素子
には、複数色の光を発することができるＬＥＤチップを
用いるタイプの他に、異なる色の光を発するＬＥＤチッ
プを複数個搭載し、光の合成によって複数種類の色を表
示するタイプがある。In addition to types that use LED chips that can emit light of multiple colors, LED light emitting display elements that can emit light of multiple colors include types equipped with multiple LED chips that emit light of different colors, and There are types that display multiple types of colors by composing them.
第２図及び第３図に示すように、２つのＬＥＤチップを
搭載するタイプでは、略播鉢状の反射ケース２０（７）
底面２２ニＬ Ｅ Ｄ ’ｒ ツブ１０ａ 、 ｌｏｂ
を並べて搭載している。As shown in FIGS. 2 and 3, in the type equipped with two LED chips, a substantially pot-shaped reflective case 20 (7) is used.
Bottom surface 22L E D'r knob 10a, lob
are installed side by side.
〈発明が解決しようとする課題〉
以下、２つのＬＥＤチップ１０ａ 、１０ｂが搭載され
ている場合を例として、複数個のＬＥＤチップを搭載す
るＬＥＤ発光表示素子の問題点について説明する。<Problems to be Solved by the Invention> Hereinafter, problems with an LED light emitting display element equipped with a plurality of LED chips will be described, taking as an example a case in which two LED chips 10a and 10b are mounted.
すなわち、１つのＬＥＤチップのみが発光している場合
には輝度ムラが生じ、２つのＬＥＤチップが同時に発光
している場合には色調ムラが生じるのである。That is, when only one LED chip emits light, uneven brightness occurs, and when two LED chips emit light at the same time, uneven color tone occurs.
２つのＬＥＤチンブ１０ａ 、ｌＯｂは、いずれも反射
ケース２０の底面２２の中心点には搭載されていないた
め、第２図に示すように、一方のＬＥＤチンブ１０ｂの
みが発光している場合には、反対側、すなわちＬＥＤチ
ップ１０ａ側の端部が暗くなるのである。Since neither of the two LED chips 10a and lOb is mounted at the center point of the bottom surface 22 of the reflective case 20, as shown in FIG. 2, when only one LED chip 10b is emitting light, , the opposite side, that is, the end on the LED chip 10a side becomes dark.
また、同様の理由から２つのＬＥＤチップ１０ａ、１０
ｂが同時に発光している場合には、第３図に示すように
色調ムラが生ずる。反射ケース２０の底面２２の中心部
分は正確な発光が得られるが、特に反射ケース２０の両
端部ではそれぞれのＬＥＤチップ１０ａ 、 １０ｂに
固有の色がでる。Also, for the same reason, two LED chips 10a, 10
If the light beams b emit light at the same time, color tone unevenness will occur as shown in FIG. Accurate light emission is obtained at the center of the bottom surface 22 of the reflective case 20, but a color unique to each LED chip 10a, 10b appears, especially at both ends of the reflective case 20.
本発明は上記事情に鑑みて創案されたもので、複数のＬ
ＥＤチンプを搭載していても輝度ムラや色調ムラが生じ
ないＬＥＤ発光表示素子を提供することを巨的としてい
る。The present invention has been devised in view of the above circumstances.
The objective is to provide an LED light-emitting display element that does not cause uneven brightness or uneven color tone even when equipped with an ED chimp.
く課題を解決するための手段〉
請求項１に係るＬＥＤ発光表示素子は、複数のＬＥＤチ
ップを搭載したＬＥＤ発光表示素子であって、ＬＥＤチ
ップからの光を反射する反射ケースの反射面を角度の異
なる第１反射面と第２反射面とから構成し、第１反射面
は斜め方向に、第２反射面は上方向にそれぞれ光を反射
するように構成されている。Means for Solving the Problems> The LED light emitting display element according to claim 1 is an LED light emitting display element equipped with a plurality of LED chips, wherein the reflective surface of the reflective case that reflects light from the LED chips is angled. It is composed of a first reflecting surface and a second reflecting surface having different angles, and the first reflecting surface is configured to reflect light in an oblique direction, and the second reflecting surface is configured to reflect light in an upward direction.
また、請求項２に係るＬＥＤ発光表示素子では、第１反
射面と反射ケースの底面とがなす角度が、第２反射面と
前記底面とがなす角度より大きく設定されている。Further, in the LED light emitting display element according to the second aspect, the angle between the first reflective surface and the bottom surface of the reflective case is set to be larger than the angle between the second reflective surface and the bottom surface.
〈作用〉 。<Effect>.
一方のＬＥＤチップから発せられた光のうち、第１反射
面で反射される光は他方のＬＥＤチップ側に、かつ第２
反射面で反射される光は第２反射面の真上方向にそれぞ
れ反射されるので、反射ケースの端部における輝度ムラ
や色調ムラが生しない。Of the light emitted from one LED chip, the light reflected by the first reflecting surface is directed to the other LED chip side and
Since the light reflected by the reflective surface is reflected directly above the second reflective surface, uneven brightness and uneven color tone do not occur at the ends of the reflective case.
〈実施例〉
以下、図面を参照して本発明に係る一実施例を説明する
。<Example> Hereinafter, an example according to the present invention will be described with reference to the drawings.
第１図は本発明の一実施例に係るＬＥＤ発光表示素子の
反射ケースの形状等を示す概略的断面図である。FIG. 1 is a schematic cross-sectional view showing the shape etc. of a reflective case of an LED light emitting display element according to an embodiment of the present invention.
本実施例に係るＬＥＤ発光表示素子は、２つのＬＥＤチ
ップ１０ａ 、 １０ｂを搭載したＬＥＤ発光表示素子
であって、ＬＥＤチップｌＯａ 、１０ｂからの光を反
射する反射ケース２０の反射面２１を角度の異なる第１
反射面２１１と第２反射面２１２とから構成し、第１反
射面２１１は斜め方向に、第２反射面２１２は上方向に
それぞれ光を反射するように構成している。The LED light emitting display element according to this embodiment is an LED light emitting display element equipped with two LED chips 10a and 10b, and the reflective surface 21 of the reflective case 20 that reflects the light from the LED chips lOa and 10b is angled. different first
It is composed of a reflective surface 211 and a second reflective surface 212, and the first reflective surface 211 is configured to reflect light in an oblique direction, and the second reflective surface 212 is configured to reflect light in an upward direction.
すなわち、反射ケース２０の反射面２１を構成する第１
反射面２１１が反射ケース２０の底面２２となす角度θ
は、第２反射面２１２が前記底面２２となす角度θ１よ
り大きく設定されているのである。That is, the first
The angle θ that the reflective surface 211 makes with the bottom surface 22 of the reflective case 20
is set larger than the angle θ1 that the second reflective surface 212 makes with the bottom surface 22.
ここで、第１図に示すように、反射ケース２０の深さを
Ｍ、反射ケース２０の中心点ＰとＬＥＤチップ１０ａと
の間の距離をｄ、前記中心点Ｐと第１反射面２１１の下
端部たるエツジＥ、との間の距離をし、前記中心点Ｐと
第２反射面２１２の下端部たるエツジＥ２との間の距離
をＬｚ、エツジＥ１とエツジＥ２との間の水平距離をＬ
３、第２反射面２１２の上端部たるエツジＥ３と前記エ
ツジＥ、との間の水平距離をり５、エツジＥ２とエツジ
Ｅ１との間の垂直距離をｍとする。Here, as shown in FIG. 1, the depth of the reflective case 20 is M, the distance between the center point P of the reflective case 20 and the LED chip 10a is d, and the distance between the center point P and the first reflective surface 211 is The distance between the center point P and the edge E2, which is the lower end of the second reflective surface 212, is Lz, and the horizontal distance between the edge E1 and the edge E2 is Lz. L
3. The horizontal distance between the edge E3, which is the upper end of the second reflective surface 212, and the edge E is 5, and the vertical distance between the edge E2 and the edge E1 is m.
すると、
（Ｌ＋ Ｌ３）ｔａｎθ、＝Ｍ−Ｌ、ｔａｎθが成
立する。Then, (L+L3)tanθ,=ML,tanθ holds true.
従って、
また、ｍ＝Ｌ：＋Ｘｔａｎ θであるから、ＬＥＤチッ
プ１．Ｏａから発する光が、第１反射面２１１でＬＥＤ
チップ］、Ｏｂ側に反射されるほど、ＬＥＤチップｌｏ
ａ とＬＥＤチップ１０ｂとの光の混合が均等化される
。ここで、エツジＥ２はＬ Ｅ Ｄチップ１．０ａの光
１０１ａをＬＥＤチンブｌＯｂの真上に反射するものと
して説明する。Therefore, since m=L:+Xtan θ, the LED chip 1. The light emitted from Oa is reflected by the LED at the first reflective surface 211.
chip], the more it is reflected to the Ob side, the more the LED chip lo
The light mixing between a and the LED chip 10b is equalized. Here, the description will be made assuming that the edge E2 reflects the light 101a of the LED chip 1.0a directly above the LED chimney lOb.
かかる条件を満たすためには、
Ｌ＋ｄ＝ （Ｍ−ｍ） Ｘｔａｎ（θ−α−（９０°−
θ））−Ｌ３
が成立しなければならない。In order to satisfy this condition, L+d= (M-m) Xtan(θ-α-(90°-
θ))-L3 must hold true.
従って、
才た、
前記０式を変形すると、
（（Ｍ −ｍ） Ｘ ｔａｎ２θ−（Ｌ ＋ ｄ ＋
Ｌ ３）） Ｘ ｔａｎ ａ−（Ｌ十ｄ＋Ｌ３）Ｘｔａ
ｎ２θ−（Ｍ−ｍ）・−−■′が成立する。Therefore, if we transform the above equation 0, we get ((M − m) X tan2θ−(L + d +
L 3)) X tan a-(L0d+L3)Xta
n2θ−(M−m)・−■′ holds true.
■′式に前記０式を代入すると、
なお、
Ｋ＝ （ＭＸｔａｎ２θ＋ ２ Ｌ ＋２ Ｌ：Ｉ）２
＋４（ｊａｎ２θ×（Ｌ ＋ ｄ 十Ｌ ｚ） Ｘ ｔ
ａｎ２θ＋Ｍ）（Ｌ−ｄ ＋ Ｌ３）とする。■ Substituting the above formula 0 into the 'formula, K= (MXtan2θ+ 2 L +2 L:I)2
+4(jan2θ×(L + d 10L z) X t
an2θ+M)(L−d+L3).
前記０式を０式に代入することにより、ｍは、Ｍ、Ｌ、
Ｌ、 、ｄ、θ１、θの関数としてあられされる。By substituting the above equation 0 into equation 0, m becomes M, L,
It appears as a function of L, , d, θ1, θ.
また、エツジＥ３で反射される光１．０２ａは、第２反
射面２１２の真上方向に反射されなければならない。Furthermore, the light 1.02a reflected by the edge E3 must be reflected directly above the second reflective surface 212.
なお、以下の説明では、ＬＥＤチップ１０ａからエツジ
Ｅ３に照射される光１０２ａが垂直線となす角度をＸと
する。In the following description, X is the angle that the light 102a irradiated from the LED chip 10a to the edge E3 makes with the vertical line.
かかる条件を満たすには、 Ｌｌ ＋Ｌ−ｄ ｔａｎＸ＝□・ ・ ・■ でなげればならない。To meet such conditions, Ll+L-d tanX=□・ ・・■ I have to run it.
また、 Ｘ−（９０°−θ１）＋θ、−９０°であるか
ら、
２θ＋ ＝１８０ ’−ｘ・・・■
が成立する。Also, since X-(90°-θ1)+θ, -90°, 2θ+ = 180'-x...■ holds true.
すなわち、
上述したような条件で反射ケース２０を構成すると、Ｌ
ＥＤチップ１０ａから発せられた光のうち、第１反射面
２１１で反射される光はＬＥＤチップ１０ｂ側に、かつ
第２反射面２１２で反射される光は第２反射面２１２の
真上方向にそれぞれ反射されるので、反射ケース２０の
端部における輝度ムラや色調ムラが生じない。That is, when the reflective case 20 is configured under the conditions described above, L
Of the light emitted from the ED chip 10a, the light reflected by the first reflective surface 211 is directed toward the LED chip 10b, and the light reflected by the second reflective surface 212 is directed directly above the second reflective surface 212. Since each light is reflected, uneven brightness and uneven color tone do not occur at the end portions of the reflective case 20.
ここで、第１図を参照しつつ、具体的な数値を当てはめ
て説明する。Here, referring to FIG. 1, explanation will be given by applying specific numerical values.
Ｌ ＋ ＝ １ ｍｍ、 Ｌ ＝ ２ ｍｍ、 ｄ
＝０．２５ｍｍとする。L + = 1 mm, L = 2 mm, d
=0.25mm.
Ｍ＝３ｍｍ、θ＝８５°の条件を上述した各式に代入す
ると、Ｘ＝４２．５°、θ、 ＝６８．７°、ｍ＝０．
７９ｍｍが求まり、反射ケース２０の形状を特定するこ
とができる。Substituting the conditions of M=3 mm and θ=85° into each of the above equations, we get X=42.5°, θ, =68.7°, m=0.
79 mm is found, and the shape of the reflective case 20 can be specified.
なお、上述した実施例では、２つのＬＥＤチップ１０ａ
、１０ｂの場合について説明したが、３つ以上のＬＥ
Ｄチップを用いる場合にも本発明は応用することができ
る。In addition, in the embodiment described above, two LED chips 10a
, 10b, but if there are three or more LEs
The present invention can also be applied when using a D chip.
〈発明の効果〉
本発明に係るＬＥＤ発光表示素子は、複数のＬＥＤチッ
プを搭載したＬＥＤ発光表示素子において、ＬＥＤチッ
プからの光を反射する反射ケースの反射面を角度の異な
る第１反射面と第２反射面とから構成し、第１反射面は
斜め方向に、第２反射面は上方向にそれぞれ光を反射す
るように構成されているので、輝度ムラや色調ムラが生
じることがない。特に、数字を表示する７セグメントタ
イプや、アルファベント等の特定の記号を表示する記号
表示タイプに好適である。<Effects of the Invention> The LED light emitting display element according to the present invention is an LED light emitting display element equipped with a plurality of LED chips, in which the reflective surface of the reflective case that reflects light from the LED chips is a first reflective surface having a different angle. Since the first reflective surface is configured to reflect light in an oblique direction and the second reflective surface is configured to reflect light in an upward direction, uneven brightness and uneven color tone will not occur. It is particularly suitable for a 7-segment type that displays numbers and a symbol display type that displays a specific symbol such as alpha vent.
第１図は本発明の一実施例に係るＬＥＤ発光表示素子の
反射ケースの形状等を示す概略的断面図、第２図〜第４
図は従来のＬＥＤ発光表示素子の概略的断面図である。
１０ａ、１０ｂ ・・・ＬＥＤチップ、２０・・・反射
ケース、２１・・・反射面、２１１ ・・・第１反射
面、２１２ ・・・第２反射面、２２・・・底面、θ
・・・第１反射面と底面とがなす角度、θ・・・第２反
射面と底面とがなす角度。FIG. 1 is a schematic cross-sectional view showing the shape etc. of a reflective case of an LED light emitting display element according to an embodiment of the present invention, and FIGS.
The figure is a schematic cross-sectional view of a conventional LED light emitting display element. 10a, 10b... LED chip, 20... Reflective case, 21... Reflective surface, 211... First reflective surface, 212... Second reflective surface, 22... Bottom surface, θ
...The angle between the first reflective surface and the bottom surface, θ...The angle between the second reflective surface and the bottom surface.
Claims (1)
子において、ＬＥＤチップからの光を反射する反射ケー
スの反射面を角度の異なる第１反射面と第２反射面とか
ら構成し、第１反射面は斜め方向に、第２反射面は上方
向にそれぞれ光を反射することを特徴とするＬＥＤ発光
表示素子。（２）前記第１反射面と反射ケースの底面と
がなす角度は、第２反射面と前記底面とがなす角度より
大きく設定されていることを特徴とする請求項１記載の
ＬＥＤ発光表示素子。(1) In an LED light-emitting display element equipped with a plurality of LED chips, the reflective surface of the reflective case that reflects light from the LED chips is composed of a first reflective surface and a second reflective surface with different angles, and the first reflective surface An LED light emitting display element characterized in that the surface reflects light in an oblique direction and the second reflective surface reflects light in an upward direction. (2) The LED light emitting display element according to claim 1, wherein the angle between the first reflective surface and the bottom surface of the reflective case is set to be larger than the angle between the second reflective surface and the bottom surface. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2313673A JP2598338B2 (en) | 1990-11-19 | 1990-11-19 | LED light-emitting display element |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2313673A JP2598338B2 (en) | 1990-11-19 | 1990-11-19 | LED light-emitting display element |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04188680A true JPH04188680A (en) | 1992-07-07 |
| JP2598338B2 JP2598338B2 (en) | 1997-04-09 |
Family
ID=18044136
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2313673A Expired - Fee Related JP2598338B2 (en) | 1990-11-19 | 1990-11-19 | LED light-emitting display element |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2598338B2 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001013437A1 (en) * | 1999-08-12 | 2001-02-22 | Rohm Co., Ltd. | Chip semiconductor light-emitting device |
| JP2003110149A (en) * | 2001-09-28 | 2003-04-11 | Matsushita Electric Ind Co Ltd | Light-emitting unit and illuminator using the light- emitting unit |
| JP2007011374A (en) * | 2005-06-30 | 2007-01-18 | Lg Philips Lcd Co Ltd | Back light and liquid crystal display device |
| JP2008243959A (en) * | 2007-03-26 | 2008-10-09 | Matsushita Electric Works Ltd | Light emitting device |
| US8011804B2 (en) | 1920-06-30 | 2011-09-06 | Lg Display Co., Ltd. | Backlight unit |
-
1990
- 1990-11-19 JP JP2313673A patent/JP2598338B2/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8011804B2 (en) | 1920-06-30 | 2011-09-06 | Lg Display Co., Ltd. | Backlight unit |
| WO2001013437A1 (en) * | 1999-08-12 | 2001-02-22 | Rohm Co., Ltd. | Chip semiconductor light-emitting device |
| JP2003110149A (en) * | 2001-09-28 | 2003-04-11 | Matsushita Electric Ind Co Ltd | Light-emitting unit and illuminator using the light- emitting unit |
| JP2007011374A (en) * | 2005-06-30 | 2007-01-18 | Lg Philips Lcd Co Ltd | Back light and liquid crystal display device |
| JP4585989B2 (en) * | 2005-06-30 | 2010-11-24 | エルジー ディスプレイ カンパニー リミテッド | Backlight, liquid crystal display element |
| US8520166B2 (en) | 2005-06-30 | 2013-08-27 | Lg Display Co., Ltd. | Backlight unit and liquid crystal display device having the same |
| US8891041B2 (en) | 2005-06-30 | 2014-11-18 | Lg Display Co., Ltd. | Backlight unit and liquid crystal display device having the same |
| JP2008243959A (en) * | 2007-03-26 | 2008-10-09 | Matsushita Electric Works Ltd | Light emitting device |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2598338B2 (en) | 1997-04-09 |
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| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |