JPH0447471B2 - - Google Patents
Info
- Publication number
- JPH0447471B2 JPH0447471B2 JP61298640A JP29864086A JPH0447471B2 JP H0447471 B2 JPH0447471 B2 JP H0447471B2 JP 61298640 A JP61298640 A JP 61298640A JP 29864086 A JP29864086 A JP 29864086A JP H0447471 B2 JPH0447471 B2 JP H0447471B2
- Authority
- JP
- Japan
- Prior art keywords
- lamp house
- white
- led
- substrate
- light source
- 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 - Lifetime
Links
Classifications
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10W—GENERIC PACKAGES, INTERCONNECTIONS, CONNECTORS OR OTHER CONSTRUCTIONAL DETAILS OF DEVICES COVERED BY CLASS H10
- H10W72/00—Interconnections or connectors in packages
- H10W72/50—Bond wires
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10W—GENERIC PACKAGES, INTERCONNECTIONS, CONNECTORS OR OTHER CONSTRUCTIONAL DETAILS OF DEVICES COVERED BY CLASS H10
- H10W72/00—Interconnections or connectors in packages
- H10W72/50—Bond wires
- H10W72/531—Shapes of wire connectors
- H10W72/536—Shapes of wire connectors the connected ends being ball-shaped
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10W—GENERIC PACKAGES, INTERCONNECTIONS, CONNECTORS OR OTHER CONSTRUCTIONAL DETAILS OF DEVICES COVERED BY CLASS H10
- H10W72/00—Interconnections or connectors in packages
- H10W72/50—Bond wires
- H10W72/531—Shapes of wire connectors
- H10W72/5363—Shapes of wire connectors the connected ends being wedge-shaped
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10W—GENERIC PACKAGES, INTERCONNECTIONS, CONNECTORS OR OTHER CONSTRUCTIONAL DETAILS OF DEVICES COVERED BY CLASS H10
- H10W72/00—Interconnections or connectors in packages
- H10W72/50—Bond wires
- H10W72/551—Materials of bond wires
- H10W72/552—Materials of bond wires comprising metals or metalloids, e.g. silver
- H10W72/5522—Materials of bond wires comprising metals or metalloids, e.g. silver comprising gold [Au]
Landscapes
- Led Device Packages (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、発光ダイオード（以下、これを
LEDと称する）により照明を行うようにした
LED面光源装置に関するものである。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a light emitting diode (hereinafter referred to as
(referred to as LED)
This relates to an LED surface light source device.
従来、この種LED面光源装置は、例えば第３
図に示すように構成されている。即ち、LED面
光源装置１は、例えばプリント配線基板（以下、
これをPWBと略す）の如き基板２の上面２ａを
印刷により白色とし、この白色上面２ａ上に適宜
な間隔をおいて複数のLED素子３を取り付けて
金線３′を用いてワイヤボンデイングすることに
より実装し、該上面２ａの周囲に沿つて枠状ラン
プハウス４を取り付け、該ランプハウス４の内側
空間に透明樹脂５をモールドし、この透明樹脂５
が硬化した後にその上面５ａのLED素子３に対
向する部分（即ち該LED素子３の上方部分）に
印刷により白色反射部６を形成し、さらに上記ラ
ンプハウス４に沿つてその上に枠状スペーサ７を
配設し、最後に該スペーサ７上にその全体を覆う
光拡散板８を貼着することによつて構成されてい
る。
Conventionally, this type of LED surface light source device, for example,
It is configured as shown in the figure. That is, the LED surface light source device 1 includes, for example, a printed wiring board (hereinafter referred to as
The upper surface 2a of a substrate 2 such as PWB (abbreviated as PWB) is printed white, and a plurality of LED elements 3 are attached at appropriate intervals on this white upper surface 2a, and wire bonded using gold wires 3'. A frame-shaped lamp house 4 is attached along the periphery of the upper surface 2a, and a transparent resin 5 is molded in the inner space of the lamp house 4.
After curing, a white reflective part 6 is formed by printing on the part of the upper surface 5a facing the LED element 3 (that is, the upper part of the LED element 3), and a frame-shaped spacer is further placed on it along the lamp house 4. 7, and finally a light diffusing plate 8 is attached on the spacer 7 to cover the entire spacer.
しかしながら、このように構成されたLED面
光源装置１においては、LED素子３の上方に配
設される白色反射部６が、硬化した透明樹脂５の
上面５ａ上に印刷により形成されているが、透明
樹脂５の硬化の際の収縮のために該上面５ａは凹
面になりやすく平面性があまり良くない。従つて
上面５ａの白色印刷の際、平面状に形成するのが
やつかいで、その形状や濃度を一定にすることが
困難であり、バラツキが生じやすく、そのため経
時変化によつて剥がれたり傷ついたりすることが
あり、安定した白色反射部が得られかつた。 However, in the LED surface light source device 1 configured in this way, the white reflective portion 6 disposed above the LED element 3 is formed by printing on the upper surface 5a of the cured transparent resin 5; Due to shrinkage of the transparent resin 5 during curing, the upper surface 5a tends to become concave and its flatness is not very good. Therefore, when printing the white color on the upper surface 5a, it is difficult to form it in a flat shape, and it is difficult to make the shape and density constant, and variations are likely to occur.As a result, it may peel off or be damaged due to changes over time. Therefore, a stable white reflective area could not be obtained.
また、面光源装置１の機能には全く寄与しない
スペーサ７を使用しているために、部品点数及び
組立て工程が多くなり、材料コスト、製造コスト
が高くなつてしまうという欠点があつた。 Furthermore, since the spacer 7 is used, which does not contribute to the function of the surface light source device 1 at all, the number of parts and assembly steps are increased, resulting in higher material and manufacturing costs.
本発明は、以上の鑑み、白色印刷の際の形状や
濃度が均一であつて安定した白色反射部が得られ
ると共に、構成及び組立てが簡単で且つコストの
低いLED面光源装置を提供することを目的とし
ている。
In view of the above, it is an object of the present invention to provide an LED surface light source device that can obtain a stable white reflecting part with a uniform shape and density during white printing, is simple in configuration and assembly, and is low in cost. The purpose is
上記目的は、本発明によれば、上面を印刷等に
より白色とした基板と、該基板の上面に適宜な間
隔をおいて配設された複数のLED素子と、上記
基板上面の周囲に沿つて取り付けられた枠状ラン
プハウスと、該ランプハウスの内側空間内にその
上部に空間を残すように充填され硬化した透明樹
脂と、該透明樹脂中にほぼ水平に配設されて該樹
脂と共に一体成形され且つ上記LED素子に対応
する上部位置に前以つて印刷等により白色反射部
を形成した透明シートと、上記ランプハウス上に
その全体を覆うように貼着された光拡散板とから
構成されているLED面光源装置によつて達成さ
れる。
According to the present invention, the above object includes a substrate whose upper surface is white by printing or the like, a plurality of LED elements arranged at appropriate intervals on the upper surface of the substrate, and a plurality of LED elements arranged along the periphery of the upper surface of the substrate. An attached frame-shaped lamp house, a transparent resin filled and cured so as to leave a space above the inner space of the lamp house, and a transparent resin disposed almost horizontally in the transparent resin and integrally molded with the resin. and a transparent sheet on which a white reflective part has been formed by printing or the like in advance at the upper position corresponding to the LED element, and a light diffusing plate stuck on the lamp house so as to cover the entire sheet. This is achieved using an LED surface light source device.
この発明によれば、白色反射部が前以つて透明
シートの表面に印刷等により形成されているの
で、該白色反射部は非常に平面性の良い面上に形
成されることになり、従つてその形状や濃度が容
易に均一にされ、しかも該白色反射部が透明樹脂
中に一体成形されているので、経時変化によつて
剥がれたり傷ついたりすることがなく、極めて安
定性の高い白色反射部が得られる。また、透明樹
脂がランプハウスの全高の途中まで充填されるこ
とにより、従来のスペーサの役割をランプハウス
の上部によつて果たすようになつているので、か
かるスペーサが不要となり、かくして部品点数が
低減され、従つて組立て工程も減少し、また白色
反射部の印刷等の際及びスペーサの組付けの際の
位置合わせを必要としないため、工程が簡略化さ
れ材料コスト及び製造コストが低減され得る。 According to this invention, since the white reflective part is previously formed on the surface of the transparent sheet by printing or the like, the white reflective part is formed on a very flat surface. Its shape and density can be easily made uniform, and since the white reflective part is integrally molded into the transparent resin, it will not peel off or get damaged over time, making it an extremely stable white reflective part. is obtained. In addition, by filling the transparent resin halfway up the total height of the lamp house, the upper part of the lamp house plays the role of a conventional spacer, eliminating the need for such a spacer and thus reducing the number of parts. Therefore, the assembly process is reduced, and alignment is not required when printing the white reflective portion or when assembling the spacer, so the process is simplified and material costs and manufacturing costs can be reduced.
以下、図面に示した一実施例に基づいて本発明
をさらに説明する。
The present invention will be further explained below based on an embodiment shown in the drawings.
第１図は本発明によるLED面光源装置の断面
図であり、このLED面光源装置１１は、例えば
以下に説明するようにして製造される。 FIG. 1 is a sectional view of an LED surface light source device according to the present invention, and this LED surface light source device 11 is manufactured, for example, as described below.
先ず、上面１２ａが印刷等により白色にされて
いるPWB等の基板１２上に、適宜な間隔例えば
10mm前後の間隔をおいて複数のLED素子１３を
取り付けて金線１３′によりワイヤボンデイング
することによつて実装する。第１図においては説
明の便宜上二個のLED素子１３が図示されてい
る。 First, on a substrate 12 such as PWB whose upper surface 12a is made white by printing etc.,
A plurality of LED elements 13 are attached at intervals of about 10 mm and mounted by wire bonding using gold wires 13'. In FIG. 1, two LED elements 13 are shown for convenience of explanation.
次に、基板１２の上面１２ａの周囲に沿つて、
枠状ランプハウス１４を接着剤等により取り付け
る。この枠状ランプハウス１４は、その内側面の
中間の高さに上向きの段部１４ａが形成され且つ
該段部１４ａの上側に上方に向かつて拡大するテ
ーパ部１４ｂを備えている。 Next, along the periphery of the upper surface 12a of the substrate 12,
The frame-shaped lamp house 14 is attached using adhesive or the like. This frame-shaped lamp house 14 has an upwardly directed step 14a formed at the middle height of its inner surface, and is provided with a tapered portion 14b that expands upwardly above the step 14a.
続いて上記ランプハウス１４内の段部１４ａ
に、アクリル樹脂、ポリカーボネイト、ポリエス
テル等により形成した透明シート１５を水平に載
置する。この透明シート１５には、その表面の上
記LED素子１３に対応する位置に前以つてシル
ク印刷の如き方法により白色反射部１６が形成さ
れており、さらにその白色反射部１６が形成され
ていない部分、例えば隣り合う白色印刷部１６と
１６との間には複数の透孔１７が設けられてい
る。 Next, the stepped portion 14a in the lamp house 14
A transparent sheet 15 made of acrylic resin, polycarbonate, polyester, etc. is placed horizontally on the sheet. This transparent sheet 15 has a white reflective part 16 formed in advance on its surface at a position corresponding to the LED element 13 by a method such as silk printing, and further has a part where the white reflective part 16 is not formed. For example, a plurality of through holes 17 are provided between adjacent white printed portions 16 .
次にランプハウス１４の内側空間内に、その上
部に空間Ｓを残すようにして上記透明シート１５
の約0.5乃至１mm上方まで透明樹脂１８を充填し
硬化させる。その際、透明樹脂１８は、該透明シ
ート１５に設けられた透孔１７を通つて該透明シ
ート１５の下方にも侵入し、これにより透明樹脂
１８中に上記透明シート１５が一体成形されるこ
とになる。 Next, the transparent sheet 15 is left in the inner space of the lamp house 14 so as to leave a space S above it.
The transparent resin 18 is filled to about 0.5 to 1 mm above the surface and hardened. At this time, the transparent resin 18 also enters the lower part of the transparent sheet 15 through the through holes 17 provided in the transparent sheet 15, so that the transparent sheet 15 is integrally molded into the transparent resin 18. become.
最後に、ランプハウス１４上にその全体を覆う
ように光拡散板１９を貼着することにより、本発
明のLED面光源装置１１が完成する。 Finally, the light diffusing plate 19 is attached to the lamp house 14 so as to cover the entire lamp house 14, thereby completing the LED surface light source device 11 of the present invention.
本発明によるLED面光源装置は以上のように
構成されており、このLED面光源装置１１にお
けるLED素子１３から発する光は、第２図に示
すようにして拡散される。即ち、LED素子１３
から出た光線L1は、透明樹脂１８、透明シート
１５を透過して透明シート１５上に形成された白
色反射部１６に到達し、そこで反射されて少しだ
け拡散された後、基板１２の上面１２ａで反射拡
散され、白色反射部１６の存在しない透過樹脂１
８及び透明シート１５の部分を透過して光拡散板
１９に到達し、該光拡散板１９を照明することに
なる。 The LED surface light source device according to the present invention is constructed as described above, and the light emitted from the LED elements 13 in this LED surface light source device 11 is diffused as shown in FIG. That is, the LED element 13
The light ray L 1 transmitted from the transparent resin 18 and the transparent sheet 15 reaches the white reflective part 16 formed on the transparent sheet 15, where it is reflected and slightly diffused, and then reaches the upper surface of the substrate 12. Transparent resin 1 that is reflected and diffused by 12a and has no white reflective part 16
8 and the transparent sheet 15 to reach the light diffusing plate 19, and the light diffusing plate 19 is illuminated.
また、LED素子１３から出た光線L2は、透明
樹脂１８、透明シート１５の白色反射部１６の存
在しない部分を透過して透明樹脂１８の表面で全
反射された後、基板１２の表面１２ａで反射拡散
され、透明樹脂１８及び透明シート１５の白色反
射部１６の無い部分を透過して光拡散板１９に到
達し、該光拡散板１９を照明することになる。 Furthermore, the light beam L 2 emitted from the LED element 13 passes through the transparent resin 18 and the portion of the transparent sheet 15 where the white reflective part 16 does not exist, is totally reflected on the surface of the transparent resin 18, and then is completely reflected on the surface 12a of the substrate 12. The light is reflected and diffused, passes through the transparent resin 18 and the portion of the transparent sheet 15 that does not have the white reflective part 16, reaches the light diffusing plate 19, and illuminates the light diffusing plate 19.
さらに、LED素子１３から出た光線L3は、透
孔１７を通つて透明樹脂１８中を透過してその表
面で全反射された後、透明シート１５上に形成さ
れた白色反射部１６により反射拡散され、再び透
明樹脂１８を透過して空気層Ｓを通つて光拡散板
１９に到達し、この場合も該光拡散板１９を照明
することになる。このような光拡散板１９の照明
が各LED素子１３により行われ、かくして光拡
散板１９のほぼ均一な照明が得られる。 Further, the light ray L 3 emitted from the LED element 13 passes through the transparent resin 18 through the through hole 17 and is totally reflected on the surface of the transparent resin 18 , and then is reflected by the white reflective part 16 formed on the transparent sheet 15 . The light is diffused, passes through the transparent resin 18 again, passes through the air layer S, and reaches the light diffusing plate 19, and in this case as well, the light diffusing plate 19 is illuminated. Such illumination of the light diffusing plate 19 is performed by each LED element 13, and thus substantially uniform illumination of the light diffusing plate 19 is obtained.
以上述べたように、本発明によれば、PWB等
の基板の上面を印刷等により白色とし、該基板の
上面に適宜な間隔をおいて配設された複数の
LED素子を配設してワイヤボンデイングし、該
基板の上面の周囲に沿つて枠状ランプハウスを取
り付けて該ランプハウスの内側空間内にその上部
に空間を残すように透明樹脂を充填及び硬化して
成るLED面光源装置において、透明樹脂中にほ
ぼ水平に配設されて該透明樹脂と共に一体成形さ
れ且つ上記LED素子に対応する上方位置に前以
つて印刷等により白色反射部を有する透明シート
と、該ランプハウス上にその全体を覆うように貼
着された光拡散板とを形成したから、白色反射部
が前以つて透明シートの表面に印刷等により形成
されることになるので、この白色反射部は非常に
平面性の良い面上に形成されることになる。従つ
て、その形状や濃度が容易に均一され、しかも該
白色反射部が透明樹脂中に一体成形されているの
で経時変化によつて剥がれたり傷ついたりするこ
とがなく、極めて安定性の高い白色反射部が得ら
れる。また、LED素子からの光が透明樹脂の表
面で反射された場合にこの白色反射部によつても
反射拡散されるため、光の拡散効果が一層向上す
る。
As described above, according to the present invention, the top surface of a board such as a PWB is made white by printing or the like, and a plurality of
LED elements are arranged and wire bonded, a frame-shaped lamp house is attached along the periphery of the upper surface of the substrate, and a transparent resin is filled and cured so as to leave a space above the lamp house inside the lamp house. An LED surface light source device comprising: a transparent sheet disposed substantially horizontally in a transparent resin, integrally molded with the transparent resin, and having a white reflective portion previously printed or the like at an upper position corresponding to the LED element; Since a light diffusing plate is formed on the lamp house so as to cover the entire lamp house, the white reflective part is previously formed on the surface of the transparent sheet by printing or the like. The reflective portion will be formed on a very flat surface. Therefore, the shape and density can be easily uniformized, and since the white reflective part is integrally molded into the transparent resin, it will not peel off or be damaged due to changes over time, making it an extremely stable white reflective part. part is obtained. Further, when the light from the LED element is reflected on the surface of the transparent resin, it is also reflected and diffused by the white reflective portion, so that the light diffusion effect is further improved.
さらにランプハウスの全高の途中まで透明樹脂
が充填されることにより、従来のスペーサの役割
をランプハウスの上部により果たすようになつて
いるので、スペーサが不要となり、かくして部品
点数が低減され、これにより組立て工程も減少し
また白色反射部の印刷等の際及びスペーサの組付
けの際の位置合わせが必要なく、工程が簡略化さ
れ材料コスト及び製造コストが低減され得る。 Furthermore, by filling the lamp house halfway with transparent resin, the role of a conventional spacer is now played by the upper part of the lamp house, eliminating the need for a spacer and thus reducing the number of parts. The assembly process is also reduced, and there is no need for alignment when printing the white reflective portion or when assembling the spacer, which simplifies the process and reduces material and manufacturing costs.
かくして、本発明によれば、LCD用バツク照
明、自動車の補助灯、文字、図形等の浮き出し表
示用の光源、常夜灯、非常灯等に最適なLED面
光源装置が提供され得る。 Thus, according to the present invention, it is possible to provide an LED surface light source device that is most suitable for LCD backlighting, automobile auxiliary lighting, light sources for embossed display of characters, figures, etc., night lights, emergency lights, and the like.
第１図は本発明によるLED面光源装置の一実
施例を示す部分断面図、第２図は第１図の実施例
の一部を拡大して示す断面図である。第３図は従
来のLED面光源装置の一例を示す断面図である。
１１……LED面光源装置；１２……基板；１
２ａ……白色印刷された基板上面；１３……
LED素子；１４……枠状ランプハウス；１４ａ
……段部；１５……透明シート；１６……白色反
射部；１７……透孔；１８……透明樹脂；１９…
…光拡散板、Ｓ……空気層。
FIG. 1 is a partial sectional view showing an embodiment of an LED surface light source device according to the present invention, and FIG. 2 is an enlarged sectional view showing a part of the embodiment of FIG. 1. FIG. 3 is a sectional view showing an example of a conventional LED surface light source device. 11... LED surface light source device; 12... board; 1
2a...Top surface of white printed board; 13...
LED element; 14...Frame lamp house; 14a
...Stepped portion; 15...Transparent sheet; 16...White reflective portion; 17...Through hole; 18...Transparent resin; 19...
...Light diffuser plate, S...Air layer.
Claims (1)
板の上面に適宜な間隔をおいて配設された複数の
LED素子と、該基板の上面の周囲に沿つて取り
付けられた枠状ランプハウスと、該ランプハウス
の内側空間内にその上部に空間を残すように充填
され硬化した透明樹脂と、該透明樹脂中にほぼ水
平に配設されて該樹脂と共に一体成形され且つ上
記LED素子に対応する上方位置に前以つて印刷
等により白色反射部を形成した透明シートと、上
記ランプハウス上にその全体を覆うように貼着さ
れた光拡散板とから構成されていることを特徴と
する、LED面光源装置。 ２ 前記白色反射部を形成した透明シートが、ラ
ンプハウス内側面に形成された段部に水平に載置
されていることを特徴とする、特許請求の範囲第
１項に記載のLED面光源装置。 ３ 前記透明シートの白色反射部を除く適宜の部
分に、透孔が形成されていることを特徴とする、
特許請求の範囲第１項または第２項に記載の
LED面光源装置。[Claims] 1. A substrate whose upper surface is white by printing, etc., and a plurality of substrates arranged at appropriate intervals on the upper surface of the substrate.
an LED element, a frame-shaped lamp house attached along the periphery of the upper surface of the substrate, a transparent resin filled and cured so as to leave a space above the inner space of the lamp house, and a transparent resin filled in and cured in the interior space of the lamp house so as to leave a space above the lamp house; A transparent sheet is disposed almost horizontally on the lamp house, is integrally molded with the resin, and has a white reflective part formed in advance by printing or the like at an upper position corresponding to the LED element, and a transparent sheet is placed on the lamp house so as to cover the whole of the sheet. An LED surface light source device comprising: a light diffusing plate attached to the surface of the LED surface light source device; 2. The LED surface light source device according to claim 1, wherein the transparent sheet on which the white reflective portion is formed is placed horizontally on a stepped portion formed on the inner surface of the lamp house. . 3. A through hole is formed in an appropriate part of the transparent sheet except for the white reflective part,
According to claim 1 or 2
LED surface light source device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61298640A JPS63152183A (en) | 1986-12-17 | 1986-12-17 | Led surface light source device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61298640A JPS63152183A (en) | 1986-12-17 | 1986-12-17 | Led surface light source device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63152183A JPS63152183A (en) | 1988-06-24 |
| JPH0447471B2 true JPH0447471B2 (en) | 1992-08-04 |
Family
ID=17862349
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61298640A Granted JPS63152183A (en) | 1986-12-17 | 1986-12-17 | Led surface light source device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63152183A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007053352A (en) * | 2005-07-22 | 2007-03-01 | Showa Denko Kk | Light emitting diode light source |
-
1986
- 1986-12-17 JP JP61298640A patent/JPS63152183A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63152183A (en) | 1988-06-24 |
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