JPH10269822A - Planar light source - Google Patents
Planar light sourceInfo
- Publication number
- JPH10269822A JPH10269822A JP10122850A JP12285098A JPH10269822A JP H10269822 A JPH10269822 A JP H10269822A JP 10122850 A JP10122850 A JP 10122850A JP 12285098 A JP12285098 A JP 12285098A JP H10269822 A JPH10269822 A JP H10269822A
- Authority
- JP
- Japan
- Prior art keywords
- light
- light source
- guide plate
- luminescence
- light guide
- 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
Landscapes
- Planar Illumination Modules (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
- Liquid Crystal (AREA)
Abstract
Description
【0001】[0001]
【発明の属する技術分野】本発明はディスプレイのバッ
クライト、照光式操作スイッチ等に使用されるLEDを
用いた面状光源に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a planar light source using LEDs used for a backlight of a display, an illuminated operation switch, and the like.
【0002】[0002]
【従来の技術】液晶ディスプレイ等の薄型表示装置のバ
ックライト用面光源として、LEDが注目されている。
LEDランプを用いた光源は、導光板の厚さ方向にあた
る端面よりLEDランプの光を導入し、面方向で全反射
させて面状光源とされる。導光板の厚さは通常2〜5ミ
リ程度と薄く、LEDランプはこの薄い導光板の端面に
埋め込まれたり、あるいは支持体等を介して密着させる
ことにより光が導光板に導入される。2. Description of the Related Art As a surface light source for a backlight of a thin display device such as a liquid crystal display, an LED has attracted attention.
A light source using an LED lamp is configured as a planar light source by introducing light from the LED lamp from an end face in a thickness direction of the light guide plate and totally reflecting the light in the surface direction. The thickness of the light guide plate is usually as thin as about 2 to 5 mm, and light is introduced into the light guide plate by embedding the LED lamp in the end face of the thin light guide plate or by closely attaching it via a support or the like.
【0003】一般に液晶ディスプレイのバックライトの
発光色はほとんどが白色とされている。しかし、LED
ランプを光源に用いて白色発光を得る場合、三原色のL
EDを集合させて、同一平面上に幾何学的に同じ位置に
配置しても、バックライトとしてはそれらのLEDを接
近した位置で視認するため、均一な白色光源とすること
は不可能であった。[0003] Generally, the emission color of the backlight of a liquid crystal display is almost white. But LED
When white light is obtained by using a lamp as a light source, the three primary colors L
Even if the EDs are assembled and arranged at the same geometric position on the same plane, it is impossible to provide a uniform white light source because the LEDs are visible at a close position as a backlight. Was.
【0004】このようなことから我々は、特願平5−3
18276号で高輝度青色LEDランプを光源に用い発
光色の色調を変換することにより白色発光可能なLED
面状光源を提案した。この面状光源は、導光板の主面の
いずれか一方に、青色LEDの発光により励起されて蛍
光を発する蛍光物質と、蛍光を散乱させる白色粉末とが
混合された蛍光散乱層を形成し、前記青色LEDの発光
の一部を前記蛍光散乱層で波長変換することにより、任
意の発光色を得ることができる。[0004] From these facts, we have filed a Japanese Patent Application No. 5-3.
No. 18276: LED capable of emitting white light by converting the color tone of emitted light using a high-intensity blue LED lamp as a light source
A planar light source was proposed. This planar light source forms a fluorescent scattering layer in which a fluorescent substance that emits fluorescence when excited by the emission of the blue LED and a white powder that scatters the fluorescence are mixed on one of the main surfaces of the light guide plate, An arbitrary luminescent color can be obtained by converting a part of the luminescence of the blue LED by the fluorescence scattering layer.
【0005】また我々は、特願平6−134763号で
は青色LEDランプを光源に用いた面状光源において、
導光板の発光観測面に、青色LEDの発光により励起さ
れて蛍光を発する蛍光物質が具備されたフィルムを設け
て、発光を波長変換することを提案した。この面状光源
は蛍光層が着脱可能なフィルム上に形成されているた
め、蛍光層が形成されたフィルムを変えるだけで簡単に
色調を変化させることができる。In Japanese Patent Application No. Hei 6-134763, we have described a planar light source using a blue LED lamp as a light source.
It has been proposed that a film provided with a fluorescent substance that emits fluorescence when excited by the emission of the blue LED is provided on the emission observation surface of the light guide plate to convert the wavelength of the emission. Since the surface light source is formed on a film on which the fluorescent layer is detachable, the color tone can be easily changed only by changing the film on which the fluorescent layer is formed.
【0006】[0006]
【発明が解決しようとする課題】しかしながら従来の特
願平6−134763号に示した面状光源では、蛍光物
質が具備されたフィルムを導光板の発光観測面全体に設
ける必要があるため、例えば導光板のサイズを大きくし
た場合、導光板に合わせて蛍光層も大きくしなければな
らなかった。また、LEDランプ不点灯時でも発光観測
面に蛍光層の色が出るため、見栄えが悪く、まぎらわし
いという欠点があった。However, in the conventional planar light source disclosed in Japanese Patent Application No. 6-134763, it is necessary to provide a film provided with a fluorescent substance on the entire light emission observation surface of the light guide plate. When the size of the light guide plate is increased, the size of the fluorescent layer must be increased in accordance with the size of the light guide plate. Further, since the color of the fluorescent layer appears on the light emission observation surface even when the LED lamp is not turned on, there is a disadvantage that the appearance is poor and confusing.
【0007】上記に示したように青色LEDの発光波長
を変換して任意色の発光が可能な面状光源とすることが
できるが、その他にもLEDを用いて白色を含めた任意
色の発光を可能とする面状光源が望まれている。従っ
て、本発明の目的とするところは、上記欠点を解決し、
LEDを用いた白色発光可能な面状光源を実現すると共
に、均一な白色及び任意色の発光を観測できる面状光源
を提供することにあり、さらには信頼性に優れたLED
の特性を利用し、バックライト、各種操作スイッチ等に
利用することにある。As described above, the emission wavelength of the blue LED can be converted to provide a planar light source capable of emitting light of any color, but other than that, the LED can be used to emit light of any color including white light. There is a demand for a planar light source that enables the above. Therefore, the object of the present invention is to solve the above disadvantages,
An object of the present invention is to provide a planar light source capable of emitting white light using an LED, and to provide a planar light source capable of observing uniform white light and light of any color.
Utilizing the characteristics described above, it is used for a backlight, various operation switches, and the like.
【0008】[0008]
【課題を解決するための手段】本発明は、青色が発光可
能なLEDからの発光を、導光板の端面から導光板の内
部に導入して、この発光を導光板の発光観測面から放出
する面状光源を改良したものである。本発明の請求項1
の面状光源は、導光板の端面に導入される光を、LED
の発光により励起されて蛍光を発する蛍光物質を具備し
てなる波長変換体で波長変換する。波長変換体で波長変
換された発光を端面から導光板に導入し、この発光を発
光観測面から放出することを特徴とする。また、本発明
の請求項2に記載の面状光源は、波長変換体がLEDか
らの発光を透過する樹脂或いはゴムからなる基材と、該
基材中に混入された蛍光物質である。さらに、本発明の
請求項3に記載の面状光源は、蛍光物質が無機蛍光物質
である。According to the present invention, light emitted from an LED capable of emitting blue light is introduced into the inside of the light guide plate from the end face of the light guide plate, and the emitted light is emitted from the light emission observation surface of the light guide plate. This is an improved planar light source. Claim 1 of the present invention
The planar light source emits light introduced into the end face of the light guide plate using an LED.
The wavelength is converted by a wavelength converter provided with a fluorescent substance that emits fluorescence when excited by the emission of light. The light emission wavelength-converted by the wavelength converter is introduced into the light guide plate from the end face, and the light emission is emitted from the light emission observation surface. Further, in the planar light source according to the second aspect of the present invention, the wavelength converter includes a base material made of resin or rubber that transmits light emitted from the LED, and a fluorescent substance mixed in the base material. Further, in the planar light source according to the third aspect of the present invention, the fluorescent substance is an inorganic fluorescent substance.
【0009】蛍光物質が具備された波長変換体4には、
例えばフィルムの表面に蛍光物質が塗布されてなる波長
変換シートがあり、この波長変換シートを光源と導光板
との接合面の大きさに合わせて切断し、これを介して光
源と導光板とを接合させる。また光源からの発光の波長
を変換するための蛍光物質としては、蛍光体、蛍光顔
料、蛍光染料等がある。これらの蛍光物質は、無機、有
機のどちらでも良いが、有機蛍光物質は直流電界により
電気泳動を起こし、色調が変化する可能性があるためあ
まり好ましくない。The wavelength converter 4 provided with the fluorescent substance includes:
For example, there is a wavelength conversion sheet in which a fluorescent substance is applied to the surface of a film, and this wavelength conversion sheet is cut in accordance with the size of the joint surface between the light source and the light guide plate, and the light source and the light guide plate are separated through this. Join. Examples of the fluorescent substance for converting the wavelength of light emitted from the light source include a fluorescent substance, a fluorescent pigment, and a fluorescent dye. These fluorescent substances may be either inorganic or organic. However, organic fluorescent substances are not preferred because they may cause electrophoresis by a DC electric field and change the color tone.
【0010】導光板としては、アクリル樹脂、ポリカー
ボネート等を用いることができる。また支持体として
は、白色のポリカーボネート、PBC、ABS等反射効
率の良いものであればよい。As the light guide plate, acrylic resin, polycarbonate, or the like can be used. The support may be any one having good reflection efficiency, such as white polycarbonate, PBC, ABS and the like.
【0011】更に本発明の面状光源は、支持体にLED
ランプが装着されてなる光源と、導光板とが弾性体を介
して接合されてなる面状光源であって、前記弾性体には
前記LEDランプの発光により励起されて蛍光を発する
蛍光物質が具備されていることを特徴とする。Further, the planar light source according to the present invention is characterized in that
A planar light source in which a light source on which a lamp is mounted and a light guide plate are joined via an elastic body, wherein the elastic body includes a fluorescent substance which emits fluorescence when excited by emission of the LED lamp. It is characterized by having been done.
【0012】我々は特願平7−182543号で、弾性
体を介して光源と導光板とを接合する方法を示した。本
発明では更に、この弾性体にLEDランプの発光により
励起されて蛍光を発する蛍光物質が具備されているた
め、弾性体を用いて光源からの発光を効率よく導光板に
導入でき、しかも弾性体に含有された蛍光物質により光
源からの発光を効率的に波長変換することができる。In Japanese Patent Application No. Hei 7-182543, a method of joining a light source and a light guide plate via an elastic body has been described. In the present invention, furthermore, since the elastic body is provided with a fluorescent substance which emits fluorescence when excited by the light emission of the LED lamp, light emission from the light source can be efficiently introduced into the light guide plate by using the elastic body. The wavelength of light emitted from the light source can be efficiently converted by the fluorescent substance contained in the phosphor.
【0013】弾性体としては特に限定するものではない
が、LEDランプの発光を透過する樹脂やゴムが用いら
れ、好ましくはシリコン樹脂、シリコンゴム、アクリル
フォーム、あるいは弾性のある基材の両面に接着剤が塗
布された両面テープや、接着後も弾性を有する透明な接
着剤が用いられる。これらの弾性体に波長を変換するた
めの蛍光物質を具備させるには、例えばシリコン、アク
リルフォーム、PET等の基材に練り込んだり、接着剤
の中に混入させる等の方法がある。The elastic body is not particularly limited, but a resin or rubber that transmits light emitted from the LED lamp is used. Preferably, silicone resin, silicone rubber, acrylic foam, or an elastic base material is adhered to both surfaces. A double-sided tape coated with an agent or a transparent adhesive having elasticity even after bonding is used. In order to equip these elastic bodies with a fluorescent substance for converting the wavelength, there is a method of kneading them into a base material such as silicon, acrylic foam, PET or the like, or mixing them into an adhesive.
【0014】[0014]
【作用】光源のLEDランプから出た光は、光源と導光
板との接合部から導光板内に導入され、面方向で全反射
されて主面側から発光が観測される。本発明の面状光源
は図1に示すように、光源と導光板1とが波長変換体4
を介して接合されているため、光源のLEDランプ2か
ら出た光の一部は、波長変換体4の蛍光物質により吸収
され同時に波長変換されて放射された後、導光板1に導
入される。従って、発光観測面側からは、LEDランプ
2の発光と波長変換体4により変換された発光とを合成
した色調の発光を観測できる。あるいは、LEDランプ
2からの光を全て波長変換体4により変換すれば、その
変換された発光のみの色調を観測することも可能であ
る。更にLEDとして高輝度青色LEDを用いれば、そ
の発光を蛍光体、蛍光顔料、蛍光染料等の蛍光物質によ
り任意の色調に変換することが可能である。The light emitted from the LED lamp as the light source is introduced into the light guide plate from the junction between the light source and the light guide plate, is totally reflected in the plane direction, and emission is observed from the main surface side. As shown in FIG. 1, the planar light source of the present invention comprises a light source
, A part of the light emitted from the LED lamp 2 as the light source is absorbed by the fluorescent substance of the wavelength converter 4, is simultaneously wavelength-converted and emitted, and is then introduced into the light guide plate 1. . Therefore, from the emission observation surface side, emission of a color tone obtained by combining the emission of the LED lamp 2 and the emission converted by the wavelength converter 4 can be observed. Alternatively, if all the light from the LED lamp 2 is converted by the wavelength converter 4, it is possible to observe the color tone of only the converted light emission. Further, if a high-brightness blue LED is used as the LED, it is possible to convert the emitted light into an arbitrary color tone by using a fluorescent substance such as a fluorescent substance, a fluorescent pigment, or a fluorescent dye.
【0015】また従来の面状光源では、蛍光物質が具備
された蛍光層を導光板の発光観測面全体に設ける必要が
あったが、本発明の面状光源では光源と導光板の接合面
のみに設けるため、波長変換材料である蛍光物質の量を
従来よりもかなり少なくできるのでコストが下がるとい
う利点がある。Further, in the conventional planar light source, it is necessary to provide a fluorescent layer provided with a fluorescent substance on the entire light emission observation surface of the light guide plate. However, in the planar light source of the present invention, only the joint surface between the light source and the light guide plate is provided. In this case, the amount of the fluorescent substance, which is a wavelength conversion material, can be considerably reduced as compared with the related art, so that there is an advantage that the cost is reduced.
【0016】更に、従来の面状光源は、LEDランプ消
灯時でも発光観測面に蛍光物質の色が出ていたが、本発
明の面状光源ではこの問題が解消され、消灯時の見栄え
が良くなる。Further, in the conventional planar light source, the color of the fluorescent substance appears on the light emission observation surface even when the LED lamp is turned off. However, the planar light source according to the present invention solves this problem and has a good appearance when the light is turned off. Become.
【0017】また本発明の面状光源は、蛍光物質が具備
された弾性体を介して光源と導光板とが接合されている
ため、弾性体の作用により光源の発光を効率よく導光板
に導入することができる。光源と導光板とを接合するに
は、突き合わせや接着剤による充填接着等の方法がある
が、光源や導光板の接合面が平滑鏡面でなく凹凸がある
場合、接合面に隙間が生じ、光源と導光板との間に空気
の層が出来てしまい、光の導入効率が悪くなっていた。
しかしながら、弾性体を介して接合すると、弾性体がク
ッションの作用をすることにより、光源と導光板1との
間にできた隙間を埋めてしまうため空気の層が出来ない
ので、光源からの発光が効率よく導光板に導入される。
また、接着剤による充填接着で接合していた時に問題と
なっていた接着剤の流れ出し等の接着ミスは起こらず、
気泡が混入する恐れもない。Further, in the planar light source of the present invention, since the light source and the light guide plate are joined via the elastic body provided with the fluorescent substance, the light of the light source is efficiently introduced into the light guide plate by the action of the elastic body. can do. To join the light source and the light guide plate, there are methods such as butting or filling and bonding with an adhesive. An air layer was formed between the light guide plate and the light guide plate, and the light introduction efficiency was deteriorated.
However, if they are joined via an elastic body, the elastic body acts as a cushion and fills a gap formed between the light source and the light guide plate 1 so that an air layer cannot be formed. Is efficiently introduced into the light guide plate.
In addition, there was no bonding error such as the flowing out of the adhesive, which had been a problem when joining by filling and bonding with the adhesive,
There is no risk of air bubbles being mixed.
【0018】[0018]
【発明の実施の形態】本発明の面状光源を実施例に基づ
き説明する。ただし、以下に示す実施例は、本発明の一
実施例を示すものであって、本発明を下記のものに特定
するものではない。 [実施例1]図1は本発明の面状光源を示す斜視図であ
る。アクリル板の裏面に拡散パターンをスクリーン印刷
した導光板を作製する。続いて、白色ポリカーボネート
支持体3に複数個の高輝度青色LEDランプ2を等間隔
で固定して光源を作製する。DESCRIPTION OF THE PREFERRED EMBODIMENTS A planar light source according to the present invention will be described based on embodiments. However, the following examples show one example of the present invention, and do not limit the present invention to the following. Embodiment 1 FIG. 1 is a perspective view showing a planar light source according to the present invention. A light guide plate having a diffusion pattern screen-printed on the back surface of the acrylic plate is manufactured. Subsequently, a plurality of high-brightness blue LED lamps 2 are fixed to the white polycarbonate support 3 at equal intervals to produce a light source.
【0019】次に、フィルム表面に蛍光層を形成して波
長変換体4を得る。蛍光層は、赤色蛍光顔料(シンロイ
ヒ化学製 FA−001)と緑色蛍光顔料(シンロイヒ
化学製 FA−005)とを等量に混合した蛍光顔料を
アクリル系バインダー中に分散したものを塗布して形成
した。Next, a wavelength converter 4 is obtained by forming a fluorescent layer on the film surface. The fluorescent layer is formed by applying a fluorescent pigment obtained by mixing an equal amount of a red fluorescent pigment (FA-001, manufactured by Shinloich Chemical) and a green fluorescent pigment (FA-005, manufactured by Shinlohi Chemical) in an acrylic binder. did.
【0020】前記導光板1と光源の支持体とを、図1に
示すように波長変換体4を介して接合させて面状光源を
得た。この面状光源の青色LEDランプ2を点灯したと
ころ、導光板1の発光観測面からは白色の面状発光が得
られた。As shown in FIG. 1, the light guide plate 1 and the light source support were joined via a wavelength converter 4 to obtain a planar light source. When the blue LED lamp 2 as the planar light source was turned on, white planar light emission was obtained from the light emission observation surface of the light guide plate 1.
【0021】[実施例2]実施例1と同様にして、導光
板1と光源とを作製する。続いて、接着後も弾性を有す
る接着剤に黄色発光蛍光体(日亜製 NP−204)を
混入させた。次に、実施例1の波長変換体4の代わり
に、前記蛍光体が含有された弾性接着剤を用いて導光板
1と光源とを接合させて面状光源を得た。この面状光源
の青色LEDランプ2を点灯したところ、導光板1の発
光観測面からは黄緑色の面状発光が得られた。Embodiment 2 A light guide plate 1 and a light source are manufactured in the same manner as in Embodiment 1. Subsequently, a yellow light-emitting phosphor (NP-204, manufactured by Nichia) was mixed into the adhesive having elasticity even after bonding. Next, instead of the wavelength converter 4 of Example 1, the light guide plate 1 and the light source were joined using an elastic adhesive containing the phosphor to obtain a planar light source. When the blue LED lamp 2 of this planar light source was turned on, yellow-green planar luminescence was obtained from the luminescence observation surface of the light guide plate 1.
【0022】[0022]
【発明の効果】以上説明したように、本発明の面状光源
は光源と導光板とが光源の発光の波長を変換するための
蛍光物質を介して接合されているので、LEDからの発
光が蛍光物質により効率的に波長変換される。従って、
蛍光物質の種類により白色を含め任意色の発光が可能と
なる。また、本発明の面状光源では光源と導光板との接
合面のみに波長変換体を設けるため、波長変換材料であ
る蛍光物質の量が節約できコストが下がる。As described above, in the planar light source of the present invention, since the light source and the light guide plate are joined via the fluorescent substance for converting the light emission wavelength of the light source, the light emission from the LED can be reduced. The wavelength is efficiently converted by the fluorescent substance. Therefore,
Depending on the type of the fluorescent substance, light of any color including white can be emitted. Further, in the planar light source of the present invention, since the wavelength converter is provided only on the joint surface between the light source and the light guide plate, the amount of the fluorescent substance as the wavelength conversion material can be saved and the cost can be reduced.
【0023】更に本発明の面状光源は、蛍光物質が具備
された弾性体を介して光源と導光板とが接合されるた
め、光源からの発光を任意の色に変換できるだけでな
く、弾性体の作用により各々の接合面に多少の凹凸があ
っても光源からの発光を効率よく導光板に導入すること
ができる。Further, in the planar light source of the present invention, since the light source and the light guide plate are joined via the elastic body provided with the fluorescent substance, the light emitted from the light source can be converted into an arbitrary color, The light emission from the light source can be efficiently introduced into the light guide plate even if each joint surface has some irregularities due to the action of (1).
【図1】 本発明の面状光源を示す斜視図。FIG. 1 is a perspective view showing a planar light source of the present invention.
1・・・・導光板 2・・・・LEDランプ 3・・・・支持体 4・・・・波長変換体 1 ··· Light guide plate 2 ··· LED lamp 3 ··· Support 4 ··· Wavelength converter
Claims (3)
導光板の端面から導光板の内部に導入し、この発光を導
光板の発光観測面から放出するように構成されてなる面
状光源において、 導光板の端面に導入される光を、LEDの発光により励
起されて蛍光を発する蛍光物質を具備してなる波長変換
体で波長変換し、波長変換された発光を端面から導光板
に導入し、この発光を発光観測面から放出するように構
成してなることを特徴とする面状光源。1. Light emission from an LED capable of emitting blue light is
In a planar light source configured to introduce light from the end face of the light guide plate into the inside of the light guide plate and emit the emitted light from the emission observation surface of the light guide plate, the light introduced into the end face of the light guide plate is emitted by the LED. The wavelength is converted by a wavelength converter comprising a fluorescent substance that emits fluorescence when excited by, the wavelength-converted light is introduced into the light guide plate from the end face, and the light is emitted from the light emission observation surface. A planar light source characterized in that:
過する樹脂或いはゴムからなる基材と、該基材中に混入
された蛍光物質である請求項1に記載の面状光源。2. The planar light source according to claim 1, wherein the wavelength converter is a base material made of resin or rubber that transmits light emitted from an LED, and a fluorescent substance mixed in the base material.
項1又は請求項2に記載の面状光源。3. The planar light source according to claim 1, wherein the fluorescent substance is an inorganic fluorescent substance.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10122850A JP3114805B2 (en) | 1998-04-15 | 1998-04-15 | Planar light source, display backlight using the same, and illuminated operation switch |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10122850A JP3114805B2 (en) | 1998-04-15 | 1998-04-15 | Planar light source, display backlight using the same, and illuminated operation switch |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP22883195A Division JP3931355B2 (en) | 1995-09-06 | 1995-09-06 | Planar light source |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH10269822A true JPH10269822A (en) | 1998-10-09 |
JP3114805B2 JP3114805B2 (en) | 2000-12-04 |
Family
ID=14846194
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP10122850A Expired - Lifetime JP3114805B2 (en) | 1998-04-15 | 1998-04-15 | Planar light source, display backlight using the same, and illuminated operation switch |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP3114805B2 (en) |
Cited By (32)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2001110216A (en) * | 1998-03-02 | 2001-04-20 | H E Williams Inc | Phosphor fluorescent assembly excited by light emitting diode |
WO2001097287A1 (en) * | 2000-06-15 | 2001-12-20 | Systemax Pty. Ltd. | Led lamp |
JP2003515956A (en) | 1999-12-02 | 2003-05-07 | コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ | Hybrid lighting system including white LED and fluorescent LED to generate white light |
US6762551B2 (en) | 2002-02-15 | 2004-07-13 | Hitachi, Ltd. | White light source and display apparatus using the same |
KR100545998B1 (en) * | 2000-05-09 | 2006-01-25 | 니치아 카가쿠 고교 가부시키가이샤 | Cotton light emitting device |
US7005197B2 (en) | 2001-07-17 | 2006-02-28 | Hitachi, Ltd. | Light source and display using the same |
JP2007149500A (en) * | 2005-11-28 | 2007-06-14 | Sony Corp | Light source device, display device and method of manufacturing light source device |
KR100796482B1 (en) * | 2001-03-07 | 2008-01-21 | 엘지.필립스 엘시디 주식회사 | Backlight and method for manufacturing the same |
US7320632B2 (en) | 2000-06-15 | 2008-01-22 | Lednium Pty Limited | Method of producing a lamp |
US7704762B2 (en) | 2002-06-14 | 2010-04-27 | Lednium Technology Pty Limited | Lamp and method of producing a lamp |
JP2010525510A (en) * | 2007-04-16 | 2010-07-22 | コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ | Optical device |
US7994530B2 (en) | 2006-03-06 | 2011-08-09 | Koninklijke Philips Electronics N.V. | Light emitting diode module |
JP2011222516A (en) * | 2010-04-10 | 2011-11-04 | Lg Innotek Co Ltd | Lighting module |
DE10201052B4 (en) * | 2001-01-16 | 2011-12-15 | Visteon Global Technologies, Inc. | LED backlighting |
WO2012023679A1 (en) * | 2010-08-16 | 2012-02-23 | Lg Innotek Co., Ltd. | Member for backlight unit using quantum dots and method of manufacturing the same |
JP2012044497A (en) * | 2010-08-20 | 2012-03-01 | Ricoh Co Ltd | Document lighting device, document reading device and image forming device |
US20120050649A1 (en) * | 2010-08-26 | 2012-03-01 | Lg Innotek Co., Ltd. | Display device |
US8142051B2 (en) * | 1999-11-18 | 2012-03-27 | Philips Solid-State Lighting Solutions, Inc. | Systems and methods for converting illumination |
JP2012516044A (en) * | 2009-01-23 | 2012-07-12 | オスラム オプト セミコンダクターズ ゲゼルシャフト ミット ベシュレンクテル ハフツング | Optoelectronics semiconductor components |
WO2013027170A2 (en) * | 2011-08-19 | 2013-02-28 | I2Ic Corporation | Light source using a photoluminescent plate |
WO2013032226A2 (en) * | 2011-08-31 | 2013-03-07 | Lg Innotek Co., Ltd. | Lighting module |
US8436388B2 (en) | 2007-07-31 | 2013-05-07 | Rambus International Ltd. | Illumination assembly including wavelength converting material having spatially varying density |
JP2013218953A (en) * | 2012-04-11 | 2013-10-24 | Sony Corp | Light-emitting device, display device and lighting device |
US8585273B2 (en) * | 2007-07-31 | 2013-11-19 | Rambus Delaware Llc | Illumination assembly including wavelength converting material |
JP2015050142A (en) * | 2013-09-04 | 2015-03-16 | 久豊技研株式会社 | Member for light emitting device, light emitting device and display device |
KR101508284B1 (en) * | 2009-12-15 | 2015-04-06 | 엘지이노텍 주식회사 | Back Light Unit Using Quantum Dots and Liquid Display Device Comprising of the Same |
WO2015081692A1 (en) * | 2013-12-06 | 2015-06-11 | 京东方科技集团股份有限公司 | Light guide plate, backlight source and liquid crystal display apparatus |
KR101534892B1 (en) * | 2011-10-17 | 2015-07-24 | 엘지이노텍 주식회사 | Backlight unit |
CN104898319A (en) * | 2015-06-05 | 2015-09-09 | 武汉华星光电技术有限公司 | Liquid crystal display device |
US9201266B2 (en) | 2011-08-26 | 2015-12-01 | Samsung Electronics Co., Ltd. | Backlight unit and manufacturing method thereof, and liquid crystal display device having the same |
JP2019061796A (en) * | 2017-09-25 | 2019-04-18 | パナソニックIpマネジメント株式会社 | Lighting fixture |
DE102013114178B4 (en) | 2013-06-12 | 2021-09-09 | Lg Display Co., Ltd. | Light emitting diode array and liquid crystal display device containing them |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7255469B2 (en) | 2004-06-30 | 2007-08-14 | 3M Innovative Properties Company | Phosphor based illumination system having a light guide and an interference reflector |
JP6192897B2 (en) | 2012-04-11 | 2017-09-06 | サターン ライセンシング エルエルシーSaturn Licensing LLC | LIGHT EMITTING DEVICE, DISPLAY DEVICE, AND LIGHTING DEVICE |
JP5939004B2 (en) | 2012-04-11 | 2016-06-22 | ソニー株式会社 | LIGHT EMITTING DEVICE, DISPLAY DEVICE, AND LIGHTING DEVICE |
WO2017051845A1 (en) | 2015-09-24 | 2017-03-30 | シャープ株式会社 | Illumination device, display device, and television receiver |
US10908348B2 (en) | 2015-09-24 | 2021-02-02 | Sharp Kabushiki Kaisha | Lighting device, display device, and television device |
WO2017051848A1 (en) | 2015-09-25 | 2017-03-30 | シャープ株式会社 | Illumination device, display device, television reception device and wavelength conversion part manufacturing method |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH02111922A (en) * | 1988-10-20 | 1990-04-24 | Fujitsu Ltd | Liquid crystal display device |
JPH05142424A (en) * | 1991-11-26 | 1993-06-11 | Nec Kansai Ltd | Plane light emitting plate |
JPH07114904A (en) * | 1993-10-18 | 1995-05-02 | Hitachi Ltd | Fluorescent discharge lamp for back-light source |
JPH07176794A (en) * | 1993-12-17 | 1995-07-14 | Nichia Chem Ind Ltd | Planar light source |
-
1998
- 1998-04-15 JP JP10122850A patent/JP3114805B2/en not_active Expired - Lifetime
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH02111922A (en) * | 1988-10-20 | 1990-04-24 | Fujitsu Ltd | Liquid crystal display device |
JPH05142424A (en) * | 1991-11-26 | 1993-06-11 | Nec Kansai Ltd | Plane light emitting plate |
JPH07114904A (en) * | 1993-10-18 | 1995-05-02 | Hitachi Ltd | Fluorescent discharge lamp for back-light source |
JPH07176794A (en) * | 1993-12-17 | 1995-07-14 | Nichia Chem Ind Ltd | Planar light source |
Cited By (48)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2001110216A (en) * | 1998-03-02 | 2001-04-20 | H E Williams Inc | Phosphor fluorescent assembly excited by light emitting diode |
JP4368987B2 (en) * | 1998-03-02 | 2009-11-18 | エイチ.イー.ウイリアムズ,インコーポレイティド | Phosphor phosphor assemblies excited by light emitting diodes |
US8142051B2 (en) * | 1999-11-18 | 2012-03-27 | Philips Solid-State Lighting Solutions, Inc. | Systems and methods for converting illumination |
JP2003515956A (en) | 1999-12-02 | 2003-05-07 | コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ | Hybrid lighting system including white LED and fluorescent LED to generate white light |
KR100545998B1 (en) * | 2000-05-09 | 2006-01-25 | 니치아 카가쿠 고교 가부시키가이샤 | Cotton light emitting device |
WO2001097287A1 (en) * | 2000-06-15 | 2001-12-20 | Systemax Pty. Ltd. | Led lamp |
US6809475B2 (en) | 2000-06-15 | 2004-10-26 | Lednium Pty Limited | Led lamp with light-emitting junctions arranged in a three-dimensional array |
US7320632B2 (en) | 2000-06-15 | 2008-01-22 | Lednium Pty Limited | Method of producing a lamp |
US7352127B2 (en) | 2000-06-15 | 2008-04-01 | Lednium Pty Limited | LED lamp with light-emitting junction arranged in three-dimensional array |
DE10201052B8 (en) * | 2001-01-16 | 2012-04-19 | Visteon Global Technologies, Inc. | LED backlighting |
DE10201052B4 (en) * | 2001-01-16 | 2011-12-15 | Visteon Global Technologies, Inc. | LED backlighting |
KR100796482B1 (en) * | 2001-03-07 | 2008-01-21 | 엘지.필립스 엘시디 주식회사 | Backlight and method for manufacturing the same |
US7005197B2 (en) | 2001-07-17 | 2006-02-28 | Hitachi, Ltd. | Light source and display using the same |
US6762551B2 (en) | 2002-02-15 | 2004-07-13 | Hitachi, Ltd. | White light source and display apparatus using the same |
US7704762B2 (en) | 2002-06-14 | 2010-04-27 | Lednium Technology Pty Limited | Lamp and method of producing a lamp |
JP2007149500A (en) * | 2005-11-28 | 2007-06-14 | Sony Corp | Light source device, display device and method of manufacturing light source device |
US7994530B2 (en) | 2006-03-06 | 2011-08-09 | Koninklijke Philips Electronics N.V. | Light emitting diode module |
JP2010525510A (en) * | 2007-04-16 | 2010-07-22 | コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ | Optical device |
US8585273B2 (en) * | 2007-07-31 | 2013-11-19 | Rambus Delaware Llc | Illumination assembly including wavelength converting material |
US8436388B2 (en) | 2007-07-31 | 2013-05-07 | Rambus International Ltd. | Illumination assembly including wavelength converting material having spatially varying density |
JP2012516044A (en) * | 2009-01-23 | 2012-07-12 | オスラム オプト セミコンダクターズ ゲゼルシャフト ミット ベシュレンクテル ハフツング | Optoelectronics semiconductor components |
US8916886B2 (en) | 2009-01-23 | 2014-12-23 | Osram Opto Semiconductors Gmbh | Optoelectronic semiconductor component |
KR101508284B1 (en) * | 2009-12-15 | 2015-04-06 | 엘지이노텍 주식회사 | Back Light Unit Using Quantum Dots and Liquid Display Device Comprising of the Same |
USRE47964E1 (en) | 2009-12-15 | 2020-04-28 | Lg Innotek Co., Ltd. | Display device |
USRE48012E1 (en) | 2009-12-15 | 2020-05-26 | Lg Innotek Co., Ltd. | Display device |
US9244209B2 (en) | 2009-12-15 | 2016-01-26 | Lg Innotek Co., Ltd. | Display device |
JP2011222516A (en) * | 2010-04-10 | 2011-11-04 | Lg Innotek Co Ltd | Lighting module |
US9188310B2 (en) | 2010-08-16 | 2015-11-17 | Lg Innotek Co., Ltd. | Member for backlight unit using quantum dots and method of manufacturing the same |
WO2012023679A1 (en) * | 2010-08-16 | 2012-02-23 | Lg Innotek Co., Ltd. | Member for backlight unit using quantum dots and method of manufacturing the same |
JP2013539170A (en) * | 2010-08-16 | 2013-10-17 | エルジー イノテック カンパニー リミテッド | Backlight unit member using quantum dots and method for manufacturing the same |
JP2012044497A (en) * | 2010-08-20 | 2012-03-01 | Ricoh Co Ltd | Document lighting device, document reading device and image forming device |
KR101261462B1 (en) * | 2010-08-26 | 2013-05-10 | 엘지이노텍 주식회사 | backlight unit |
US20120050649A1 (en) * | 2010-08-26 | 2012-03-01 | Lg Innotek Co., Ltd. | Display device |
WO2013027170A3 (en) * | 2011-08-19 | 2013-05-23 | I2Ic Corporation | Light source using a photoluminescent plate |
WO2013027170A2 (en) * | 2011-08-19 | 2013-02-28 | I2Ic Corporation | Light source using a photoluminescent plate |
US9201266B2 (en) | 2011-08-26 | 2015-12-01 | Samsung Electronics Co., Ltd. | Backlight unit and manufacturing method thereof, and liquid crystal display device having the same |
WO2013032226A2 (en) * | 2011-08-31 | 2013-03-07 | Lg Innotek Co., Ltd. | Lighting module |
CN103765080A (en) * | 2011-08-31 | 2014-04-30 | Lg伊诺特有限公司 | Lighting module |
CN103765080B (en) * | 2011-08-31 | 2016-10-12 | Lg伊诺特有限公司 | Lighting module |
US9488771B2 (en) | 2011-08-31 | 2016-11-08 | Lg Innotek Co., Ltd. | Lighting module |
WO2013032226A3 (en) * | 2011-08-31 | 2013-05-10 | Lg Innotek Co., Ltd. | Lighting module |
KR101534892B1 (en) * | 2011-10-17 | 2015-07-24 | 엘지이노텍 주식회사 | Backlight unit |
JP2013218953A (en) * | 2012-04-11 | 2013-10-24 | Sony Corp | Light-emitting device, display device and lighting device |
DE102013114178B4 (en) | 2013-06-12 | 2021-09-09 | Lg Display Co., Ltd. | Light emitting diode array and liquid crystal display device containing them |
JP2015050142A (en) * | 2013-09-04 | 2015-03-16 | 久豊技研株式会社 | Member for light emitting device, light emitting device and display device |
WO2015081692A1 (en) * | 2013-12-06 | 2015-06-11 | 京东方科技集团股份有限公司 | Light guide plate, backlight source and liquid crystal display apparatus |
CN104898319A (en) * | 2015-06-05 | 2015-09-09 | 武汉华星光电技术有限公司 | Liquid crystal display device |
JP2019061796A (en) * | 2017-09-25 | 2019-04-18 | パナソニックIpマネジメント株式会社 | Lighting fixture |
Also Published As
Publication number | Publication date |
---|---|
JP3114805B2 (en) | 2000-12-04 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP3114805B2 (en) | Planar light source, display backlight using the same, and illuminated operation switch | |
JP3931355B2 (en) | Planar light source | |
JP3116727B2 (en) | Planar light source | |
US5982092A (en) | Light Emitting Diode planar light source with blue light or ultraviolet ray-emitting luminescent crystal with optional UV filter | |
JPH07176794A (en) | Planar light source | |
JP5226323B2 (en) | Light emitting module and backlight and liquid crystal display device using the same | |
JP2013539170A (en) | Backlight unit member using quantum dots and method for manufacturing the same | |
JP2002050797A (en) | Semiconductor excitation phosphor light-emitting device and manufacturing method therefor | |
TW200835978A (en) | Back lighting unit having phosphor film structure | |
JP2001243821A (en) | Surface light source with led | |
JP5460665B2 (en) | Light emitting diode package | |
JP2000133006A (en) | Surface light source | |
JP2000285718A (en) | Surface light source | |
CN104170103B (en) | Light-emitting device and illuminator | |
JP2002358812A (en) | Light source using galium nitride compound semiconductor | |
JP2868085B2 (en) | Planar light source | |
JP2000352947A (en) | Display device | |
JP3175739B2 (en) | Surface light source | |
JP2002270020A (en) | Light source device | |
KR200410425Y1 (en) | Optical source module and liquid crystal panel combination | |
JPH1097200A (en) | Light source | |
JP3417384B2 (en) | LCD backlight | |
US6608329B1 (en) | Purplish pink light emitting diode | |
WO2012046661A1 (en) | Light-emitting element, light-emitting apparatus, and display apparatus | |
CN107728412A (en) | A kind of light supply apparatus and relevant projecting system |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20070929 Year of fee payment: 7 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20080929 Year of fee payment: 8 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20080929 Year of fee payment: 8 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090929 Year of fee payment: 9 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090929 Year of fee payment: 9 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090929 Year of fee payment: 9 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20100929 Year of fee payment: 10 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20100929 Year of fee payment: 10 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20110929 Year of fee payment: 11 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20110929 Year of fee payment: 11 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20120929 Year of fee payment: 12 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20120929 Year of fee payment: 12 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20130929 Year of fee payment: 13 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
EXPY | Cancellation because of completion of term |