JP2755080B2 - LED display - Google Patents

LED display

Info

Publication number
JP2755080B2
JP2755080B2 JP4335733A JP33573392A JP2755080B2 JP 2755080 B2 JP2755080 B2 JP 2755080B2 JP 4335733 A JP4335733 A JP 4335733A JP 33573392 A JP33573392 A JP 33573392A JP 2755080 B2 JP2755080 B2 JP 2755080B2
Authority
JP
Japan
Prior art keywords
led
leds
led display
display
eaves
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.)
Expired - Fee Related
Application number
JP4335733A
Other languages
Japanese (ja)
Other versions
JPH06186911A (en
Inventor
昭則 矢鳴
紀明 奈田
靖則 井手上
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP4335733A priority Critical patent/JP2755080B2/en
Publication of JPH06186911A publication Critical patent/JPH06186911A/en
Application granted granted Critical
Publication of JP2755080B2 publication Critical patent/JP2755080B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
    • G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
    • G09F9/33—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements being semiconductor devices, e.g. diodes
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F27/00—Combined visual and audible advertising or displaying, e.g. for public address
    • G09F27/008—Sun shades, shades, hoods or louvres on electronic displays to minimise the effect of direct sun light on the display
    • 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
    • H01L2224/481—Disposition
    • H01L2224/48151—Connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive
    • H01L2224/48221—Connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive the body and the item being stacked
    • H01L2224/48245—Connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive the body and the item being stacked the item being metallic
    • H01L2224/48247—Connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive the body and the item being stacked the item being metallic connecting the wire to a bond pad of the item
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
    • H01L2924/30—Technical effects
    • H01L2924/301—Electrical effects
    • H01L2924/3025—Electromagnetic shielding

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)
  • Led Device Packages (AREA)

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【０００１】[0001]

【産業上の利用分野】本発明は情報表示用ＬＥＤ表示器
に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an LED display for displaying information.

【０００２】[0002]

【従来の技術】近年、情報伝達手段としてＬＥＤ表示器
を用いた情報表示板が利用されるようになってきてい
る。従来ＬＥＤ表示器は主に屋内で使用されることが多
かったが、最近では屋外での使用が可能な高輝度タイプ
のＬＥＤ表示器が開発されてきている。2. Description of the Related Art In recent years, an information display panel using an LED display has been used as information transmission means. Conventionally, LED displays have been mainly used indoors, but recently, high-brightness type LED displays that can be used outdoors have been developed.

【０００３】以下に図面を参照しながら従来のＬＥＤ表
示器の一例を説明する。図３は従来のＬＥＤ表示器の一
文字分の正面図であり、２５６個のＬＥＤ２が碁盤目状
に配列されており、任意のＬＥＤを選択的に点灯させる
事により、文字や図形を表示させるものである。An example of a conventional LED display will be described below with reference to the drawings. FIG. 3 is a front view of one character of a conventional LED display, in which 256 LEDs 2 are arranged in a grid pattern, and characters or figures are displayed by selectively lighting arbitrary LEDs. It is.

【０００４】図４は従来のＬＥＤ表示器の一部詳細図で
あり、図４に於て、ＬＥＤ表示器には１つのドット毎
に、隣接するドットへの光漏れを防止する仕切り板１が
設けられ、前記仕切り板１にはＬＥＤ２を挿通する為の
孔３が開けられると共に、孔３の上部には太陽光がＬＥ
Ｄ２に直接当たりＬＥＤ光が太陽光により相殺される事
を防止する目的の庇４が設けられている。１つのドット
には図５に示す様に赤色を発光する素子２ａと緑色を発
光する素子２ｂを各々１個ずつ搭載した２色発光用のＬ
ＥＤ２が配置されている。素子２ａ及び２ｂは金属製の
反射鏡２ｃに電気的な導伝性を有する材料２ｄにより固
定され、電気回路（図示せず）よりの電流を流す為のワ
イヤー２ｅが接続されている。反射鏡２ｃの回りには透
明なレンズ２ｆが形成され素子２ａ及び２ｂからの発光
を前面方向へ効率的に集めると共に素子２ａ及び２ｂの
機械的な保護を行っている。各素子２ａ及び２ｂは電気
回路からの信号を受けて赤色、緑色、オレンジ色（赤色
緑色の同時点灯）に発光し、文字や図形を表示する。FIG. 4 is a partially detailed view of a conventional LED display. In FIG. 4, a partition plate 1 for preventing light from leaking to adjacent dots is provided for each dot in the LED display. The partition plate 1 is provided with a hole 3 through which the LED 2 is inserted.
An eave 4 is provided to prevent the LED light from directly hitting the D2 and being offset by the sunlight. As shown in FIG. 5, one dot is provided with a two-color light emitting element L having two red light emitting elements 2a and one green light emitting element 2b.
ED2 is arranged. The elements 2a and 2b are fixed to a metal reflecting mirror 2c by a material 2d having electrical conductivity, and connected to a wire 2e for flowing a current from an electric circuit (not shown). A transparent lens 2f is formed around the reflecting mirror 2c to efficiently collect light emitted from the elements 2a and 2b in the front direction and mechanically protect the elements 2a and 2b. Each of the elements 2a and 2b receives a signal from the electric circuit and emits light in red, green, and orange (simultaneously lighting red and green) to display characters and figures.

【０００５】[0005]

【発明が解決しようとする課題】しかしながら従来のＬ
ＥＤ表示器では、一つのＬＥＤに搭載された赤色を発光
する素子と緑色を発光する素子の輝度が各々の素子を構
成する材料特性の違いによって異なり、現在の技術では
一般的には赤色１００％に対して緑色は約３０％の輝度
しかなく、赤色１個の素子に対して緑色は３個の素子を
搭載するのが理想的である。しかしながら従来より用い
られてきたＬＥＤの構造では一つのＬＥＤ上に多くの素
子を搭載することは製造技術的に困難であり、又、多く
の素子を搭載するためにはスペース上の問題から新しく
反射鏡の金型を製作する必要があり、極めて不経済であ
る。又、太陽光がＬＥＤに直接当たる事を防止する庇が
ある為にＬＥＤ表示器を屋外に取り付けて下方から（矢
印方向）見た場合ＬＥＤが庇により隠れる為視認性が損
なわれる。本発明は前記課題を解決して緑色が屋外の使
用に於いても明瞭な視認性を得ることができると共に下
方からの視認性の良いＬＥＤ表示器を提供するものであ
る。However, the conventional L
In an ED display, the luminance of an element that emits red light and an element that emits green light mounted on one LED differ depending on the difference in material characteristics of each element. On the other hand, green has only about 30% of luminance, and green ideally has three elements mounted on one element of red. However, it is difficult to mount a large number of elements on a single LED in the LED structure which has been conventionally used because of the manufacturing technology. It is necessary to make a mirror mold, which is extremely uneconomical. Further, since there is an eave for preventing sunlight from directly hitting the LED, when the LED display is mounted outdoors and viewed from below (in the direction of the arrow), the LED is hidden by the eave, and visibility is impaired. An object of the present invention is to solve the above-mentioned problems and to provide an LED display which can obtain clear visibility even when green is used outdoors and has good visibility from below.

【０００６】[0006]

【課題を解決するための手段】上記問題点を解決するた
めに本発明のＬＥＤ表示器は、緑色を発光するＬＥＤ２
個と赤色を発光するＬＥＤ１個とを接近して配置して１
つのドットとし、前記ＬＥＤを挿通する為の孔を有した
部材と、ＬＥＤの光軸方向を水平方向にして設置した
時、太陽光がＬＥＤに当たらずに影となる位置に設けら
れた庇とを具備し、１ドットのＬＥＤ配置が、緑色を発
光するＬＥＤ２個を赤色を発光するＬＥＤ１個よりも庇
側に配置し、且つ、緑色を発光するＬＥＤ２個と赤色を
発光するＬＥＤ１個の各々のＬＥＤ中心を結ぶ三角形の
中心点が前記孔を形成する部材の孔の中心点よりも庇側
に位置して配置すると共に、前記庇の上面側を全面にわ
たりテーパ形状としたものである。In order to solve the above-mentioned problems, an LED display of the present invention comprises an LED 2 which emits green light.
And one LED that emits red light,
A single dot, a member having a hole for inserting the LED, and an eave provided at a position where the sunlight is in a shadow without hitting the LED when the LED is installed with the optical axis direction horizontal. The LED arrangement of 1 dot arranges two LEDs that emit green light on the eaves side than one LED that emits red light, and each of two LEDs that emit green light and one LED that emits red light The center point of the triangle connecting the centers of the LEDs is positioned closer to the eaves than the center point of the hole of the member forming the hole, and the upper surface side of the eaves is tapered over the entire surface.

【０００７】[0007]

【作用】本発明は上記した構成によって、輝度の低い緑
色ＬＥＤの輝度を確保すると共に、ＬＥＤ光が太陽光に
て相殺される事なく明瞭な視認性が得られる。又、太陽
光をさえぎる庇がテーパ状の為、ＬＥＤ表示器下方から
の視認性が良いＬＥＤ表示器が得られるものである。According to the present invention, with the above-described structure, the brightness of the green LED having a low brightness is ensured, and clear visibility can be obtained without the LED light being offset by the sunlight. In addition, since the eaves that block sunlight are tapered, an LED display with good visibility from below the LED display can be obtained.

【０００８】[0008]

【実施例】以下に、本発明の一実施例であるＬＥＤ表示
器について、図面を参照しながら説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An LED display according to an embodiment of the present invention will be described below with reference to the drawings.

【０００９】図１は本発明のＬＥＤ表示器一文字分の正
面図であり、３個のＬＥＤ２ａ２ｂを１つのドットとし
て碁盤目状に２５６ドット配列し、任意のＬＥＤを選択
的に点灯させる事により、文字や図形を表示させるもの
である。図２は本発明のＬＥＤ表示器の一部詳細図であ
り、ＬＥＤ表示器には１つのドット毎に隣接するドット
への光漏れを防止する仕切り板１が設けられ、前記仕切
り板１にはＬＥＤ２を挿通する為の孔３が開けられると
共に、孔３の上部には、太陽光がＬＥＤ２に直接当た
り、ＬＥＤ２から発光した光が相殺されて視認性が損な
われる事を防止する目的として庇４が設けられている。
仕切り板１のひとつの孔３には庇４により太陽光の陰に
なり易い上側に緑色に発光するＬＥＤ２ａが２個配置さ
れ、前記２個のＬＥＤ２ａの中央部下側に赤色に発光す
るＬＥＤ２ｂが１個配置されて１つのドットを形成して
いる。ここで、前記３個のＬＥＤの各々の中心を結ぶ三
角形の中心点５が仕切り板１のＬＥＤを挿通する為の孔
３の中心点６よりも庇４側になるようにＬＥＤ２が配置
されている。この配置はＬＥＤの１ドットを庇４に近く
することで太陽光によって視認性が損なわれることを防
止するとともに次に述べる下側の庇の陰となって下方か
らの視認性の低下することを防止するためのものであ
る。さらに、庇４の上面４ａはＬＥＤ表示器を屋外に取
り付けて下方（矢印方向）から見た場合に、庇４により
赤色を発光するＬＥＤ２ｂが隠れて視認性が損なわれる
事を防止する為にテーパ状に形成されている。この結
果、本ＬＥＤ表示器をビル壁面などの高所に設置したと
き、遠方の水平に近い方向からはもちろん比較的近くの
ＬＥＤ表示器を見上げるような位置からでもその表示内
容を読み取ることができる。FIG. 1 is a front view of one character of the LED display of the present invention. The three LEDs 2a2b are arranged in a grid pattern in 256 dots as one dot, and an arbitrary LED is selectively turned on. It displays characters and figures. FIG. 2 is a partial detailed view of the LED display of the present invention. The LED display is provided with a partition plate 1 for preventing light leakage to adjacent dots for each dot. A hole 3 for inserting the LED 2 is opened, and an eave 4 is provided above the hole 3 for the purpose of preventing sunlight from directly hitting the LED 2 and canceling out the light emitted from the LED 2 to impair the visibility. Is provided.
In one hole 3 of the partition plate 1, two LEDs 2a that emit green light are arranged on the upper side, which is likely to be shaded by sunlight due to the eaves 4, and one LED 2b that emits red light below the center of the two LEDs 2a. The dots are arranged individually to form one dot. Here, the LED 2 is arranged such that the center point 5 of the triangle connecting the centers of the three LEDs is closer to the eaves 4 than the center point 6 of the hole 3 for inserting the LED of the partition plate 1. I have. This arrangement prevents the visibility from being impaired by sunlight by bringing one dot of the LED closer to the eaves 4 and also reduces the visibility from below due to the shadow of the lower eaves described below. This is to prevent it. Further, the upper surface 4a of the eaves 4 is tapered in order to prevent the LEDs 2b that emit red light from being hidden by the eaves 4 and impairing visibility when the LED display is mounted outdoors and viewed from below (in the direction of the arrow). It is formed in a shape. As a result, when the present LED display is installed at a high place such as a building wall surface, the display contents can be read not only from a distant near horizontal direction but also from a position where a relatively close LED display is looked up. .

【００１０】なお、本発明では１ドットを赤色に発光す
るＬＥＤを１個、緑色に発光するＬＥＤを２個の構成と
したがそれぞれさらに多数個としても構わない。この場
合でも輝度の違いを補うために赤色に発光するＬＥＤの
個数より緑色に発光するＬＥＤの個数が多いことが好ま
しい。In the present invention, one LED that emits red light for one dot and two LEDs that emit green light are used. However, more LEDs may be used. Even in this case, it is preferable that the number of LEDs that emit green light is larger than the number of LEDs that emit red light to compensate for the difference in luminance.

【００１１】[0011]

【発明の効果】以上、本発明の一実施例に基づいて説明
したように、本発明によれば、ＬＥＤ表示器の１ドット
に赤色を発光するＬＥＤに比べて輝度の低い緑色を発光
するＬＥＤを２個配置した為緑色の輝度が大きく、又、
太陽光の影響を受けにくい庇側に緑色が有る為屋外での
視認性が良い。又、１ドットを構成するＬＥＤ全体を仕
切り板の１ドットの孔に対して上部に配置し、なおかつ
庇の上部をテーパ状にしたためＬＥＤ表示器を取り付け
た場合に下方からの視認性が良くなる。As described above, according to one embodiment of the present invention, according to the present invention, an LED which emits green light having a lower luminance than an LED which emits red light per dot of an LED display. , The green luminance is large,
Good visibility outdoors because there is a green color on the eaves side that is not easily affected by sunlight. Further, the entire LED constituting one dot is arranged above the hole of one dot of the partition plate, and the upper part of the eaves is tapered, so that the visibility from below is improved when the LED display is attached. .

【図面の簡単な説明】[Brief description of the drawings]

【図１】本発明のＬＥＤ表示器の正面図FIG. 1 is a front view of an LED display of the present invention.

【図２】本発明のＬＥＤ表示器の一部詳細図FIG. 2 is a partially detailed view of the LED display of the present invention.

【図３】従来のＬＥＤ表示器の正面図FIG. 3 is a front view of a conventional LED display.

【図４】従来のＬＥＤ表示器の一部詳細図FIG. 4 is a partially detailed view of a conventional LED display.

【図５】従来のＬＥＤ表示器用ＬＥＤの詳細図FIG. 5 is a detailed view of a conventional LED for an LED display.

【符号の説明】[Explanation of symbols]

１ 仕切り板 ２ ＬＥＤ ３ 孔 ４ 庇 ５ ３個のＬＥＤの中心 ６ 孔の中心 DESCRIPTION OF SYMBOLS 1 Partition plate 2 LED 3 hole 4 Eave 5 Center of three LEDs 6 Center of hole

───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.6，ＤＢ名) G09F 9/33 G09F 9/00 335──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. 6 , DB name) G09F 9/33 G09F 9/00 335

Claims (2)

(57)【特許請求の範囲】(57) [Claims] 【請求項１】 ＬＥＤを碁盤目状に配列して各ＬＥＤを
選択的に点灯させる事により文字、図形等を表示するＬ
ＥＤ表示器に於いて、緑色を発光するＬＥＤ２個と赤色
を発光するＬＥＤ１個を接近して配置してひとつのドッ
トとし、前記ＬＥＤを挿通する為の孔を有した部材と、
ＬＥＤの光軸を水平方向にして設置した時太陽光線がＬ
ＥＤに当たらずに影となる位置に設けられた庇とを具備
し、前記１ドットのＬＥＤの配置が、緑色を発光するＬ
ＥＤ２個を赤色を発光するＬＥＤ１個よりも庇側に位置
し、且つ、緑色を発光するＬＥＤ２個と赤色を発光する
ＬＥＤ１個の各々のＬＥＤの中心を結ぶ三角形の中心点
が、前記孔の中心点よりも前記庇側に位置して構成した
ことを特徴とするＬＥＤ表示器。1. An LED which displays characters, figures, etc. by arranging LEDs in a grid pattern and selectively lighting each LED.
In the ED display, a member having holes for inserting the LEDs by arranging two LEDs emitting green light and one LED emitting red light close to each other to form one dot,
When installed with the LED's optical axis horizontal, the sunlight is L
An eave provided at a position that does not hit the ED and becomes a shadow, and the arrangement of the one-dot LED is such that the green light is emitted.
The center point of the triangle that connects the two EDs to the eaves side of the one LED that emits red light and that connects the centers of the two LEDs that emit green light and the LED that emits red light is the center of the hole. An LED display, wherein the LED display is located closer to the eaves side than a point. 【請求項２】 上記庇の上面側を全面にわたりテーパ形
状としたことを特徴とする請求項１記載のＬＥＤ表示
器。2. The LED display according to claim 1, wherein the upper surface side of the eaves has a tapered shape over the entire surface.
JP4335733A 1992-12-16 1992-12-16 LED display Expired - Fee Related JP2755080B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4335733A JP2755080B2 (en) 1992-12-16 1992-12-16 LED display

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4335733A JP2755080B2 (en) 1992-12-16 1992-12-16 LED display

Publications (2)

Publication Number Publication Date
JPH06186911A JPH06186911A (en) 1994-07-08
JP2755080B2 true JP2755080B2 (en) 1998-05-20

Family

ID=18291870

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4335733A Expired - Fee Related JP2755080B2 (en) 1992-12-16 1992-12-16 LED display

Country Status (1)

Country Link
JP (1) JP2755080B2 (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9606695D0 (en) * 1996-03-29 1996-06-05 Rolls Royce Power Eng Display sign and an optical element for use with the same
JPH10190066A (en) * 1996-12-27 1998-07-21 Nichia Chem Ind Ltd Light emitting diode and led display using the same
GB2324363B (en) * 1997-04-16 2001-05-16 Siemens Plc Improvements in or relating to variable message displays
GB2324598B (en) * 1997-04-21 2001-04-18 Microsense Systems Ltd A display
JP4545281B2 (en) * 2000-05-24 2010-09-15 アビックス株式会社 Panel type LED display module
KR100983582B1 (en) * 2007-12-31 2010-10-11 엘지디스플레이 주식회사 Apparatus and method for exposure and method for pattrning thin layer using the same
WO2009157046A1 (en) * 2008-06-27 2009-12-30 株式会社日立製作所 Plasma display device
US8974077B2 (en) 2012-07-30 2015-03-10 Ultravision Technologies, Llc Heat sink for LED light source
US9195281B2 (en) 2013-12-31 2015-11-24 Ultravision Technologies, Llc System and method for a modular multi-panel display
JP2016099393A (en) * 2014-11-18 2016-05-30 レシップホールディングス株式会社 Led display unit

Also Published As

Publication number Publication date
JPH06186911A (en) 1994-07-08

Similar Documents

Publication Publication Date Title
US6496162B2 (en) Light emitting diode display unit
KR100376893B1 (en) A multi display board
US5066947A (en) Very large size display screen
JP2755080B2 (en) LED display
JP2571743Y2 (en) Surface light collector for dot matrix light-emitting displays
JP2898600B2 (en) Light emitting display
JP2001168396A (en) Light emitting display device and light emitting display unit
JP3477358B2 (en) LED display
JP3656428B2 (en) LED display
KR200251058Y1 (en) A multi display board
JPH10254388A (en) Display device
JPH0557859U (en) Surface condensing plate for dot matrix light emitting display
JPH01222610A (en) Mosaic led display device
KR20030055843A (en) Apparatus for advertisement display using P4 LED
JPH07302931A (en) Aggregate lamp
JP2002055632A (en) Light-emitting display device
KR100877294B1 (en) Led display board
JP2000250437A (en) Light emitting display device using light emitting diode
JP3209161B2 (en) Semiconductor light emitting device
EP0883100B1 (en) Casing for variable message displaying devices
KR200223474Y1 (en) Module for electric light board
JP2000075814A (en) Light-emitting display device
JPH0257313B2 (en)
JPH0342471Y2 (en)
KR200269125Y1 (en) Apparatus for advertisement display using P4 LED

Legal Events

Date Code Title Description
LAPS Cancellation because of no payment of annual fees