JPH0992886A - Led surface light source - Google Patents
Led surface light sourceInfo
- Publication number
- JPH0992886A JPH0992886A JP7246525A JP24652595A JPH0992886A JP H0992886 A JPH0992886 A JP H0992886A JP 7246525 A JP7246525 A JP 7246525A JP 24652595 A JP24652595 A JP 24652595A JP H0992886 A JPH0992886 A JP H0992886A
- Authority
- JP
- Japan
- Prior art keywords
- light
- light guide
- guide plate
- led lamp
- 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.)
- Granted
Links
Landscapes
- Led Device Packages (AREA)
- Liquid Crystal (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は液晶表示装置等のバック
ライトとして使用されるＬＥＤを用いた面光源に関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a surface light source using an LED used as a backlight of a liquid crystal display device or 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
ックライトには、導光板を用いた面光源が用いられてお
り、このような面光源の光源としてＬＥＤが注目されて
いる。ＬＥＤランプを用いた面光源は、導光板の厚さ方
向にあたる端面にＬＥＤランプを配し、端面から導入さ
れたＬＥＤランプの光を導光板に設けられた光拡散体で
面内均一に反射拡散させることにより均一な輝度の面光
源とされる。2. Description of the Related Art A surface light source using a light guide plate is used for a backlight of a thin display device such as a liquid crystal display, and an LED is attracting attention as a light source of such a surface light source. The surface light source using the LED lamp has the LED lamp arranged on the end face corresponding to the thickness direction of the light guide plate, and the light of the LED lamp introduced from the end face is uniformly diffused in the surface by the light diffuser provided on the light guide plate. By doing so, a surface light source having uniform brightness is obtained.
【０００３】光源からの発光を反射拡散させる光拡散体
を形成するには、次のような方法がある。一般的には導
光板の背面に酸化チタン、チタン酸バリウム等の白色物
質を直接印刷したり、前記白色物質が印刷されたシート
を導光板の背面に貼り合わせたりして光拡散体を形成す
る。また、導光板背面にパターン化された微細な凹凸を
施し、この凹凸で光源からの発光を発光観測面に拡散さ
せる方法や、あるいは導光板内部に反射拡散物質を混入
させてＬＥＤランプからの発光を拡散させる方法もあ
る。There are the following methods for forming a light diffuser that reflects and diffuses light emitted from a light source. Generally, a white material such as titanium oxide or barium titanate is directly printed on the back surface of the light guide plate, or a sheet on which the white material is printed is attached to the back surface of the light guide plate to form a light diffuser. . In addition, a method of making fine unevenness patterned on the back surface of the light guide plate and diffusing the light emission from the light source to the light emission observation surface by this unevenness, or mixing the reflective diffusion substance inside the light guide plate and emitting light from the LED lamp There is also a way to diffuse.
【０００４】光拡散体は通常グラデーションが施されて
いる。白色物質を印刷する方法では、光源から近い位置
では単位面積当たりの被覆率が小さく、光源から遠ざか
るにつれて被覆率が高くなるようなパターンが選択され
る。The light diffuser is usually provided with gradation. In the method of printing a white substance, a pattern is selected such that the coverage rate per unit area is small at a position close to the light source and the coverage rate increases as the distance from the light source increases.
【０００５】しかしながら、ＬＥＤランプには指向性が
あるため、導光板に設けられた光拡散体において、従来
のように光源から遠ざかるにつれて被覆率が高くなるグ
ラデーションでは光源から離れた面では均一な輝度の発
光面が得られるが、図３に示すように、ＬＥＤランプ直
前部が極端に明るく、ＬＥＤとＬＥＤの間の部分は暗く
なってしまい、ＬＥＤランプ近傍では発光輝度に明暗が
生じてしまうという欠点があった。However, since the LED lamp has directivity, in the light diffuser provided on the light guide plate, in the gradation in which the coverage increases as the distance from the light source is increased as in the conventional case, uniform brightness is obtained on the surface away from the light source. However, as shown in FIG. 3, the area immediately before the LED lamp is extremely bright, the area between the LEDs is dark, and the light emission brightness is bright and dark near the LED lamp. There was a flaw.
【０００６】上記欠点を解決するため、導光板背面に形
成する光拡散体において上記のようなグラデーションの
他に、ＬＥＤランプ近傍においても面発光の輝度に応じ
たパターンの光拡散体を設ける方法がある。他に、導光
板端面の光導入部に凹部を形成してＬＥＤランプの指向
性を広げる方法もある。しかしながら、これらの方法は
ＬＥＤランプのピッチが変われば、それに応じた光拡散
体のパターンの印刷や、成形等のやり直しをする必要が
あり製造工程上あまり望ましくない。In order to solve the above-mentioned drawbacks, in the light diffuser formed on the back surface of the light guide plate, in addition to the gradation as described above, there is a method of providing a light diffuser having a pattern corresponding to the brightness of surface emission near the LED lamp. is there. In addition, there is also a method of forming a recess in the light introducing portion on the end surface of the light guide plate to widen the directivity of the LED lamp. However, in these methods, if the pitch of the LED lamp is changed, it is necessary to print the pattern of the light diffuser or to perform molding again, and this is not desirable in the manufacturing process.
【０００７】その他、ＬＥＤランプ近傍の不均一発光部
を覆って無発光部を大きくする方法もあるが、導光板の
大きさに対して無発光部をできるだけ小さくして、発光
輝度が均一である有効発光面積を広くする方が好まし
い。In addition, there is a method of enlarging the non-light emitting part by covering the non-uniform light emitting part in the vicinity of the LED lamp, but the non-light emitting part is made as small as possible with respect to the size of the light guide plate so that the light emission brightness is uniform. It is preferable to widen the effective light emitting area.
【０００８】[0008]
【発明が解決しようとする課題】従って、本発明はこの
ような事情を鑑みて成されたものであり、その目的とす
るところは、ＬＥＤランプを光源とした導光板を用いた
面光源の面内輝度を均一にして、面光源の有効発光面積
を広くすると共に、少ない個数のＬＥＤランプでも均一
な輝度の発光面が得られる面光源を提供することにあ
る。Therefore, the present invention has been made in view of the above circumstances, and an object of the present invention is to provide a surface of a surface light source using a light guide plate using an LED lamp as a light source. An object of the present invention is to provide a surface light source in which the internal brightness is made uniform, the effective light emitting area of the surface light source is widened, and a light emitting surface having a uniform brightness can be obtained even with a small number of LED lamps.
【０００９】[0009]
【課題を解決するための手段】本発明のＬＥＤ面光源
は、ＬＥＤランプが導光板の端面に配されて、その導光
板の内部または背面にはＬＥＤランプからの発光を導光
板全体に拡散する光拡散体が設けられており、更にその
導光板背面にはＬＥＤランプの光を発光観測面側に反射
拡散する反射シートが備えられてなるＬＥＤ面光源であ
って、前記反射シートはＬＥＤランプ近傍で導光板背面
と部分的に接着されてＬＥＤランプ近傍の光を均一に拡
散することを特徴とする。In the LED surface light source of the present invention, an LED lamp is disposed on an end surface of a light guide plate, and light emitted from the LED lamp is diffused inside or on the back surface of the light guide plate. An LED surface light source is provided with a light diffuser, and a reflection sheet for reflecting and diffusing the light of the LED lamp toward the light emission observation surface side is provided on the back surface of the light guide plate, wherein the reflection sheet is in the vicinity of the LED lamp. Is partially adhered to the back surface of the light guide plate to uniformly diffuse the light in the vicinity of the LED lamp.
【００１０】前記光拡散体とは、ＬＥＤランプの発光を
反射拡散して周囲に拡散させる作用を有する層を示し、
その光拡散体を導光板に設けるには従来の方法が用いら
れる。例えば、導光板背面に反射拡散物質を直接印刷す
る方法、反射拡散物質が印刷された樹脂シートを導光板
背面に設置する方法、導光板背面に微細な凹凸を形成す
る方法等があり、また反射拡散物質を導光板内部に混入
させる方法もある。The light diffuser is a layer having a function of reflecting and diffusing the light emitted from the LED lamp and diffusing it to the surroundings.
A conventional method is used to provide the light diffuser on the light guide plate. For example, there are a method of directly printing a reflective diffusion material on the back surface of the light guide plate, a method of installing a resin sheet printed with the reflective diffusion material on the back surface of the light guide plate, a method of forming fine irregularities on the back surface of the light guide plate, and the like. There is also a method of mixing a diffusing substance inside the light guide plate.
【００１１】反射シートは、例えば酸化アルミニウム、
チタン酸バリウム、酸化チタン等の反射拡散物質をアル
ミニウム箔、ＰＥＴ等のシートに塗布したり、あるいは
練り込んだものや、その他、表面が鏡面とされた金属箔
を用いることができるが、反射拡散物質および金属箔は
可視光の反射率が高いものであれば何でもよく特に限定
するものではない。The reflective sheet is, for example, aluminum oxide,
Sheets of aluminum foil, PET, etc. coated or kneaded with a reflective diffusion material such as barium titanate or titanium oxide, or other metallic foil with a mirror surface can be used. The substance and the metal foil are not particularly limited as long as they have high visible light reflectance.
【００１２】導光板背面と反射シートとを接着するに
は、発光を透過するものであれば何でも良く、例えば透
明な接着剤や両面テープを用いることができるが、好ま
しくは導光板と屈折率の近いものを用いる。なぜなら
ば、導光板と反射シートを接着させることにより、発光
は導光板内から接着剤を透過し反射シートで拡散される
が、この時導光板と接着剤の屈折率が違いすぎると、接
着剤を透過する光の量が減少するからである。Any material can be used to bond the back surface of the light guide plate to the reflection sheet as long as it transmits light. For example, a transparent adhesive or a double-sided tape can be used. Use a close one. This is because when the light guide plate and the reflection sheet are adhered, the light emission passes through the adhesive from the inside of the light guide plate and is diffused by the reflection sheet. At this time, if the refractive index of the light guide plate and the adhesive are too different, the adhesive agent This is because the amount of light that passes through is reduced.
【００１３】[0013]
【作用】図３は従来のＬＥＤ面光源を発光面側から見た
模式的な平面図であるが、ＬＥＤランプ近傍では暗い部
分と明るい部分があり不均一な面発光である。図１は本
発明のＬＥＤ面光源の導光板背面と反射シートとの接着
部を示す模式図であるが、このように本発明のＬＥＤ面
光源は、ＬＥＤランプ１近傍の暗い部分の導光板３背面
と、導光板３背面に備えられた反射シートとが斜線で示
したような形状で接着されている。通常導光板背面に備
えられた反射シートは、ＬＥＤランプの発光が発光観測
面以外に漏れるのを防ぐ作用をするが、透明な接着剤等
で導光板と反射シートとを接着させることにより、接着
部の反射シートが光拡散体の役目をする。つまり、導光
板３背面には■で示したようにＬＥＤ光源から遠ざかる
につれて被覆率が高くなるようなパターンの光拡散体４
が設けられているが、本発明では更に導光板背面と反射
シートとが斜線で示したように部分的に接着されること
により、その接着部つまりＬＥＤランプ近傍の暗い部分
にも光拡散体が設けられたことになる。光拡散体は発光
を周囲に拡散する作用を有するが、導光板背面と反射シ
ートとの接着部でも同様に、発光は導光板内から接着剤
を透過し反射シートで周囲に拡散される。従って、この
反射シートの光拡散作用により接着部における導光板の
発光観測面側の発光輝度が高くなるため、従来では暗か
った部分が明るくなり、ＬＥＤランプ近傍でも均一な面
発光が得られる。従って本発明のＬＥＤ面光源は、均一
に発光する導光板面積が大きくなるので全体として有効
に使用できる発光面積が広くなる。FIG. 3 is a schematic plan view of a conventional LED surface light source viewed from the light emitting surface side. However, in the vicinity of the LED lamp, there are a dark portion and a bright portion, and the surface emission is non-uniform. FIG. 1 is a schematic view showing a bonding portion between the back surface of the light guide plate of the LED surface light source of the present invention and the reflection sheet. As described above, the LED surface light source of the present invention has the light guide plate 3 in the dark portion near the LED lamp 1. The back surface and the reflection sheet provided on the back surface of the light guide plate 3 are bonded to each other in a shape shown by diagonal lines. Normally, the reflection sheet provided on the back surface of the light guide plate has a function of preventing the light emission of the LED lamp from leaking to other than the light emission observation surface. However, by bonding the light guide plate and the reflection sheet with a transparent adhesive or the like, they are bonded together. The reflection sheet of the part serves as a light diffuser. That is, on the back surface of the light guide plate 3, the light diffuser 4 having a pattern in which the coverage increases as the distance from the LED light source increases, as shown by ■.
In the present invention, the back surface of the light guide plate and the reflection sheet are partially adhered as shown by the diagonal lines, so that the light diffuser is also formed in the adhesion portion, that is, in the dark portion near the LED lamp. It will be provided. The light diffuser has a function of diffusing the emitted light to the surroundings. Similarly, at the bonding portion between the back surface of the light guide plate and the reflection sheet, the emitted light is transmitted through the adhesive from the inside of the light guide plate and diffused to the surroundings by the reflection sheet. Therefore, the light diffusing action of the reflection sheet increases the light emission brightness on the light emission observation surface side of the light guide plate in the adhesive portion, so that the conventionally dark portion becomes bright and uniform surface emission can be obtained even in the vicinity of the LED lamp. Therefore, in the LED surface light source of the present invention, the area of the light guide plate that uniformly emits light becomes large, and the light emitting area that can be effectively used as a whole becomes wide.
【００１４】また本発明のＬＥＤ面光源では、用いるＬ
ＥＤランプの輝度及び指向性に応じて導光板背面と反射
シートの接着部の形状を変えるだけでよいので、製造工
程上都合がよい。またＬＥＤランプのピッチを変えた場
合においても、そのピッチに合わせて接着部の位置を変
えるだけでよく簡単に対処できる。Further, in the LED surface light source of the present invention, L
Since it is only necessary to change the shape of the adhesive portion between the back surface of the light guide plate and the reflection sheet according to the brightness and directivity of the ED lamp, it is convenient in the manufacturing process. Further, even when the pitch of the LED lamps is changed, it is sufficient to simply cope with the pitch by changing the position of the adhesive portion.
【００１５】[0015]
【実施例】本発明のＬＥＤ面光源を実施例に基づいて説
明する。 ［実施例１］図１は本発明のＬＥＤ面光源の導光板背面
と反射シートとの接着部を示す模式図であり、図２は本
発明のＬＥＤ面光源の構造を示す模式的な断面図であ
る。複数のＬＥＤランプ１は支持体２に固定され、支持
体２を介して導光板３の端面からＬＥＤランプ１の発光
を導入している。支持体２は例えば白色のポリカーボネ
ート、アクリル、塩化ビニルのような白色の樹脂よりな
り、この支持体２に貫通孔を形成してその貫通孔にＬＥ
Ｄランプ１を挿入することによりＬＥＤランプ１を固定
している。支持体２を導光板３の端面に密着させること
によりＬＥＤランプ１からの発光を導光板３内に導入で
きる。また、導光板３の背面には光拡散体４が形成され
ており、光拡散体４はＬＥＤランプ１から遠ざかるにつ
れて白色物質の被覆率が大きくなるようにグラデーショ
ンがスクリーン印刷されてなる。EXAMPLES The LED surface light source of the present invention will be described based on examples. [Embodiment 1] FIG. 1 is a schematic view showing a bonding portion between a back surface of a light guide plate and a reflection sheet of an LED surface light source of the present invention, and FIG. 2 is a schematic sectional view showing a structure of the LED surface light source of the present invention. Is. The plurality of LED lamps 1 are fixed to a support 2, and the light emitted from the LED lamps 1 is introduced from the end surface of the light guide plate 3 via the support 2. The support 2 is made of a white resin such as white polycarbonate, acrylic, or vinyl chloride, and a through hole is formed in the support 2 and the LE is provided in the through hole.
The LED lamp 1 is fixed by inserting the D lamp 1. Light emission from the LED lamp 1 can be introduced into the light guide plate 3 by bringing the support 2 into close contact with the end surface of the light guide plate 3. Further, a light diffuser 4 is formed on the back surface of the light guide plate 3, and the light diffuser 4 is screen-printed with gradation so that the coverage of the white substance increases as the distance from the LED lamp 1 increases.
【００１６】導光板３の背面には、ＬＥＤランプ１の発
光が導光板３背面から漏れないようにするための反射シ
ート５（(株)きもと製 レフホワイト #１８８）が備え
られるが、更に前記反射シート５は、ＬＥＤランプ１の
輝度が低い部分では、図１及び図２の斜線部で示すよう
に、導光板３背面と無色透明な両面テープ６（３Ｍ社製
F-9469pc）を介して接着されている。つまり、複数の
ＬＥＤランプ１を直線上に並べた場合、ＬＥＤランプと
ＬＥＤランプとの間が暗くなるので、暗い部分の導光板
３背面と反射シート５とを接着させてＬＥＤランプ１近
傍の発光面の輝度を均一にしている。On the back surface of the light guide plate 3, there is provided a reflection sheet 5 (Ref White # 188 manufactured by Kimoto Co., Ltd.) for preventing the light emission of the LED lamp 1 from leaking from the back surface of the light guide plate 3. The reflective sheet 5 has a transparent and transparent double-sided tape 6 (made by 3M company) on the back surface of the light guide plate 3 as shown by the hatched portions in FIGS.
F-9469pc) is attached. That is, when a plurality of LED lamps 1 are arranged in a straight line, the space between the LED lamps becomes dark, so that the back surface of the light guide plate 3 in the dark portion and the reflection sheet 5 are adhered to each other to emit light in the vicinity of the LED lamps 1. The brightness of the surface is made uniform.
【００１７】［実施例２］実施例１と異なり、複数のＬ
ＥＤランプは導光板の端面に埋め込まれた構造を有して
いる。それ以外は実施例１と同様であり、導光板の背面
には光拡散体が設けられており、光拡散体はＬＥＤラン
プから遠ざかるにつれて白色物質の被覆率が大きくなる
ようにグラデーションがスクリーン印刷されてなる。更
に導光板背面に備えられた反射シートは、ＬＥＤランプ
近傍の面輝度が低い部分で導光板背面と両面テープを介
して接着されており、ＬＥＤランプ近傍の発光面の輝度
を均一にしている。[Second Embodiment] Different from the first embodiment, a plurality of L's are provided.
The ED lamp has a structure embedded in the end surface of the light guide plate. Other than that is the same as in Example 1, a light diffuser is provided on the back surface of the light guide plate, and the light diffuser is screen-printed with a gradation so that the coverage of the white substance increases as the distance from the LED lamp increases. It becomes. Further, the reflection sheet provided on the back surface of the light guide plate is adhered to the back surface of the light guide plate via a double-sided tape at a portion where the surface brightness near the LED lamp is low, so that the brightness of the light emitting surface near the LED lamp is uniform.
【００１８】なお実施例の導光板は単なる板状の導光板
を用いたが、このような形状に限らず光源から遠くなる
に従って厚さが薄くなる舟型の導光板を用いても良く、
またＬＥＤも樹脂でモールドしたものを用いているが、
特に限定するものでなくチップタイプのＬＥＤを用いて
も良いことは言うまでもない。さらに光拡散体は導光板
背面に白色物質をスクリーン印刷して設けたが、白色物
質が印刷された樹脂シートを導光板背面に貼着しても良
く、また導光板背面に微細な凹凸を形成して光を発光観
測面側に拡散させても良く、あるいは反射拡散物質が混
入された導光板を用いることもできる。Although the light guide plate of the embodiment uses a simple plate-like light guide plate, it is not limited to such a shape, and a boat-shaped light guide plate whose thickness becomes thinner as the distance from the light source increases,
The LED is also molded with resin,
Needless to say, chip-type LEDs may be used without particular limitation. Further, the light diffuser is provided by screen-printing a white material on the back surface of the light guide plate, but a resin sheet printed with a white material may be attached to the back surface of the light guide plate, and fine irregularities are formed on the back surface of the light guide plate. Then, the light may be diffused to the emission observation surface side, or a light guide plate mixed with a reflective diffusion material may be used.
【００１９】[0019]
【発明の効果】以上説明したように、本発明のＬＥＤ光
源はＬＥＤランプ近傍の導光板背面が反射シートと部分
的に接着されているため、ＬＥＤランプ近傍の導光板も
均一に発光させることができるので面光源の実質的な有
効発光面積が広がる。また、少量のＬＥＤランプでも均
一な面発光を得ることができるので面光源の消費電力を
低減させることができる。As described above, in the LED light source of the present invention, the back surface of the light guide plate near the LED lamp is partially adhered to the reflection sheet, so that the light guide plate near the LED lamp can also emit light uniformly. Therefore, the effective light emitting area of the surface light source is expanded. Further, even with a small amount of LED lamps, uniform surface emission can be obtained, so that the power consumption of the surface light source can be reduced.
【００２０】また本発明は導光板背面と反射シートとを
接着剤や両面テープ等で接着するだけであるので、ＬＥ
Ｄランプの種類、及びＬＥＤランプのピッチの変更に素
早く対応できるため、製造工程上非常に有用である。Further, according to the present invention, since the back surface of the light guide plate and the reflection sheet are simply bonded with an adhesive or a double-sided tape, LE
This is very useful in the manufacturing process because it can quickly respond to changes in the type of D lamp and the pitch of LED lamps.
【図１】 本発明のＬＥＤ面光源の導光板背面と反射シ
ートとの接着部を示す模式図。FIG. 1 is a schematic view showing a bonding portion between a back surface of a light guide plate and a reflection sheet of an LED surface light source of the present invention.
【図２】 本発明のＬＥＤ面光源の構造を示す模式断面
図。FIG. 2 is a schematic cross-sectional view showing the structure of the LED surface light source of the present invention.
【図３】 従来のＬＥＤ面光源を発光面側から見た模式
的な平面図。FIG. 3 is a schematic plan view of a conventional LED surface light source viewed from a light emitting surface side.
１・・・・ＬＥＤランプ ２・・・・支持体 ３・・・・導光板 ４・・・・光拡散体 ５・・・・反射シート ６・・・・両面テープ 1 ... LED lamp 2 ... Support 3 ... Light guide plate 4 ... Light diffuser 5 ... Reflective sheet 6 ... Double-sided tape
Claims (1)
て、その導光板の内部または背面にはＬＥＤランプから
の発光を導光板全体に拡散する光拡散体が設けられてお
り、更にその導光板背面にはＬＥＤランプの光を発光観
測面側に反射拡散する反射シートが備えられてなるＬＥ
Ｄ面光源であって、前記反射シートはＬＥＤランプ近傍
で導光板背面と部分的に接着されてＬＥＤランプ近傍の
光を均一に拡散することを特徴とするＬＥＤ面光源。1. An LED lamp is disposed on an end surface of a light guide plate, and a light diffuser for diffusing light emitted from the LED lamp over the entire light guide plate is provided inside or on the back surface of the light guide plate. LE having a reflection sheet on the back surface of the light plate for reflecting and diffusing the light of the LED lamp toward the light emission observation surface side
The D surface light source, wherein the reflection sheet is partially adhered to the back surface of the light guide plate in the vicinity of the LED lamp to uniformly diffuse the light in the vicinity of the LED lamp.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24652595A JP3267119B2 (en) | 1995-09-26 | 1995-09-26 | LED surface light source |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24652595A JP3267119B2 (en) | 1995-09-26 | 1995-09-26 | LED surface light source |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0992886A true JPH0992886A (en) | 1997-04-04 |
| JP3267119B2 JP3267119B2 (en) | 2002-03-18 |
Family
ID=17149705
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP24652595A Expired - Fee Related JP3267119B2 (en) | 1995-09-26 | 1995-09-26 | LED surface light source |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3267119B2 (en) |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001043721A (en) * | 1999-07-28 | 2001-02-16 | Sanyo Electric Co Ltd | Surface light source device and display device |
| JP2001043720A (en) * | 1999-07-28 | 2001-02-16 | Sanyo Electric Co Ltd | Surface light source device and display device |
| US6299338B1 (en) | 1998-11-30 | 2001-10-09 | General Electric Company | Decorative lighting apparatus with light source and luminescent material |
| CN100370283C (en) * | 2004-12-24 | 2008-02-20 | 鸿富锦精密工业（深圳）有限公司 | Guiding light plate |
| CN100370338C (en) * | 2003-08-03 | 2008-02-20 | 鸿富锦精密工业（深圳）有限公司 | Back light system |
| CN100378541C (en) * | 2003-10-28 | 2008-04-02 | 三菱电机株式会社 | Liquid crystal display apparatus and electronic equipment |
| CN100395615C (en) * | 2004-11-24 | 2008-06-18 | 鸿富锦精密工业（深圳）有限公司 | Ligh guide plate and back ligth module using said light guide plate |
| CN100399141C (en) * | 2004-04-21 | 2008-07-02 | 友达光电股份有限公司 | Backlight assembly |
| CN100419528C (en) * | 2003-08-14 | 2008-09-17 | 鸿富锦精密工业（深圳）有限公司 | Back light assembly and its light guide board |
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| US8337067B2 (en) | 2006-11-07 | 2012-12-25 | Samsung Display Co., Ltd. | Backlight unit and liquid crystal display having the same |
| CN102890307A (en) * | 2012-10-11 | 2013-01-23 | 京东方科技集团股份有限公司 | Light guide plate, backlight module and display device |
| CN107085260A (en) * | 2017-06-23 | 2017-08-22 | 北京小米移动软件有限公司 | The backing structure and LED of side entering type LED |
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1995
- 1995-09-26 JP JP24652595A patent/JP3267119B2/en not_active Expired - Fee Related
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6299338B1 (en) | 1998-11-30 | 2001-10-09 | General Electric Company | Decorative lighting apparatus with light source and luminescent material |
| JP2001043720A (en) * | 1999-07-28 | 2001-02-16 | Sanyo Electric Co Ltd | Surface light source device and display device |
| JP2001043721A (en) * | 1999-07-28 | 2001-02-16 | Sanyo Electric Co Ltd | Surface light source device and display device |
| CN100370338C (en) * | 2003-08-03 | 2008-02-20 | 鸿富锦精密工业（深圳）有限公司 | Back light system |
| CN100419528C (en) * | 2003-08-14 | 2008-09-17 | 鸿富锦精密工业（深圳）有限公司 | Back light assembly and its light guide board |
| CN100378541C (en) * | 2003-10-28 | 2008-04-02 | 三菱电机株式会社 | Liquid crystal display apparatus and electronic equipment |
| US7742121B2 (en) | 2003-10-28 | 2010-06-22 | Mitsubishi Denki Kabushiki Kaisha | Liquid crystal display apparatus and electronic equipment |
| CN100399141C (en) * | 2004-04-21 | 2008-07-02 | 友达光电股份有限公司 | Backlight assembly |
| CN100395615C (en) * | 2004-11-24 | 2008-06-18 | 鸿富锦精密工业（深圳）有限公司 | Ligh guide plate and back ligth module using said light guide plate |
| CN100370283C (en) * | 2004-12-24 | 2008-02-20 | 鸿富锦精密工业（深圳）有限公司 | Guiding light plate |
| US7646450B2 (en) * | 2005-12-29 | 2010-01-12 | Lg Display Co., Ltd. | Light emitting diode array, method of manufacturing the same, backlight assembly having the same, and LCD having the same |
| KR101284964B1 (en) * | 2005-12-29 | 2013-07-10 | 엘지디스플레이 주식회사 | Light-emiting diode array and method of fabricating the same and backlight assembly having the same and lcd having the same |
| US8337067B2 (en) | 2006-11-07 | 2012-12-25 | Samsung Display Co., Ltd. | Backlight unit and liquid crystal display having the same |
| KR101453954B1 (en) * | 2006-11-07 | 2014-10-23 | 삼성디스플레이 주식회사 | Back-light unit and liquid crystal display having the same |
| CN102890307A (en) * | 2012-10-11 | 2013-01-23 | 京东方科技集团股份有限公司 | Light guide plate, backlight module and display device |
| CN107085260A (en) * | 2017-06-23 | 2017-08-22 | 北京小米移动软件有限公司 | The backing structure and LED of side entering type LED |
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