JPH08335048A - Back light device - Google Patents

Back light device

Info

Publication number
JPH08335048A
JPH08335048A JP14277195A JP14277195A JPH08335048A JP H08335048 A JPH08335048 A JP H08335048A JP 14277195 A JP14277195 A JP 14277195A JP 14277195 A JP14277195 A JP 14277195A JP H08335048 A JPH08335048 A JP H08335048A
Authority
JP
Japan
Prior art keywords
guide plate
light guide
sheet
reflection
light
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
JP14277195A
Other languages
Japanese (ja)
Inventor
Shinichi Hotta
真一 堀田
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.)
NEC Home Electronics Ltd
NEC Corp
Original Assignee
NEC Home Electronics Ltd
Nippon Electric 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 NEC Home Electronics Ltd, Nippon Electric Co Ltd filed Critical NEC Home Electronics Ltd
Priority to JP14277195A priority Critical patent/JPH08335048A/en
Publication of JPH08335048A publication Critical patent/JPH08335048A/en
Withdrawn legal-status Critical Current

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  • Illuminated Signs And Luminous Advertising (AREA)

Abstract

PURPOSE: To provide a back light device in which the light emitted from a fluorescent lamp can be effectively utilized with a relatively simple structure to effectively increase the luminance in a light guide plate. CONSTITUTION: A reflecting sheet 2 and a diffusing sheet 3 are arranged on the lower surface side and upper surface side of a square light guide plate 1 consisting of acrylic resin, respectively. A liquid crystal panel 4 is arranged on the diffusing sheet 3 so as to be superposed thereon. A reflecting layer 8 consisting of aluminum foil is laminated on the non-light guide plate side (back surface side) of the reflecting sheet 2. On the other hand, a straight type fluorescent lamp 5 is arranged on one end surface 1a of the light guide plate 1, and the circumference is enclosed by a lamp house 6 having a high reflecting layer 7 by silver vapor deposition on the inner surface. The end part 6a of the lamp house 6 is situated on the end surface 1a side of the light guide plate 1, and protruding parts 2a, 8a of the reflecting sheet 2 and the reflecting layer 8 are arranged on the reverse side so as to be superposed thereon.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】この発明はバックライト装置に関
し、特にエッジライト形のバックライト装置における導
光板背面部の反射構造の改良に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a backlight device, and more particularly to improvement of a reflection structure on a back surface of a light guide plate in an edge light type backlight device.

【0002】[0002]

【従来の技術】従来のこの種バックライト装置は、例え
ば図4に示すように構成されている。同図において、1
はアクリル樹脂などからなる角形の導光板であって、そ
れの下面側(背面側)には反射シ−ト2が、上面側には
拡散シ−ト3がそれぞれ配置されている。そして、拡散
シ−ト3には液晶パネル4が重ね合わせるように配置さ
れている。一方、導光板1の一方の端面1aには直管形
の冷陰極蛍光ランプなどの蛍光ランプ5が配置されてい
る。この蛍光ランプ5はほぼU字状のランプハウス6に
て、導光板1の端面1aに対向する部分を除いてほぼ囲
繞されている。このランプハウス6の内面には、例えば
銀蒸着膜からなり反射シ−ト2より反射性の高い高反射
層7が形成されている。尚、ランプハウス6のそれぞれ
の端部6a,6bは導光板1の下面側及び上面側の端部
に当接ないし若干の隙間を有するように配置されてい
る。
2. Description of the Related Art A conventional backlight device of this type is constructed, for example, as shown in FIG. In the figure, 1
Is a prismatic light guide plate made of acrylic resin or the like, and a reflection sheet 2 is arranged on the lower surface side (rear surface side) thereof and a diffusion sheet 3 is arranged on the upper surface side thereof. A liquid crystal panel 4 is arranged on the diffusion sheet 3 so as to overlap with each other. On the other hand, a fluorescent lamp 5 such as a straight tube type cold cathode fluorescent lamp is arranged on one end surface 1a of the light guide plate 1. The fluorescent lamp 5 is substantially surrounded by a U-shaped lamp house 6 except for a portion facing the end surface 1 a of the light guide plate 1. On the inner surface of the lamp house 6, a highly reflective layer 7 made of, for example, a silver vapor deposition film and having higher reflectivity than the reflective sheet 2 is formed. The respective end portions 6a and 6b of the lamp house 6 are arranged so as to abut or have a slight gap with the end portions on the lower surface side and the upper surface side of the light guide plate 1.

【0003】この装置によれば、蛍光ランプから放射さ
れた光は導光板1の端面1aに、直接的ないし高反射層
7にて反射されて間接的に導入された後、導光板1の内
部での屈折,反射シ−ト2での反射などに基づいて拡散
シ−ト3を介して液晶パネル4に入射される。このため
に、液晶パネル4は比較的均一な輝度で照明され、良好
な表示が得られる。
According to this device, the light emitted from the fluorescent lamp is introduced into the end face 1a of the light guide plate 1 directly or after being reflected by the high reflection layer 7 and indirectly introduced, and then inside the light guide plate 1. The light is incident on the liquid crystal panel 4 through the diffusion sheet 3 on the basis of the refraction at 1, the reflection at the reflection sheet 2, and the like. Therefore, the liquid crystal panel 4 is illuminated with a relatively uniform luminance, and a good display can be obtained.

【0004】[0004]

【発明が解決しようとする課題】ところで、このバック
ライト装置において、導光板1の下面側に配置されてい
る反射シ−ト2は、例えば厚さが188μmの発泡ポリ
エチレンテレフタレ−ト樹脂にて構成されており、それ
の反射率も91〜93に達している関係で、上述のよう
に良好な液晶表示が得られる上、装置の小形化も図るこ
とができるものである。
By the way, in this backlight device, the reflection sheet 2 disposed on the lower surface side of the light guide plate 1 is, for example, a foamed polyethylene terephthalate resin having a thickness of 188 μm. Since it is configured and the reflectance thereof reaches 91 to 93, it is possible to obtain a good liquid crystal display as described above and also to downsize the device.

【0005】しかしながら、反射シ−ト2はその厚さが
極めて薄いために、導光板1から漏れた光をすべて導光
板側に反射させることができず、一部の光は反射シ−ト
2の背面側に漏れてしまう。このために、光の利用率が
低下し輝度も低下するという問題がある。
However, since the reflection sheet 2 is extremely thin, all the light leaked from the light guide plate 1 cannot be reflected to the light guide plate side, and a part of the light is reflected. Leaks to the back side of. For this reason, there is a problem that the light utilization rate is reduced and the luminance is also reduced.

【0006】それ故に、本発明の目的は、比較的に簡単
な構成によって蛍光ランプから放射される光を有効に利
用し、導光板における輝度を効果的に高めることのでき
るバックライト装置を提供することにある。
Therefore, an object of the present invention is to provide a backlight device which can effectively utilize the light emitted from the fluorescent lamp and can effectively increase the brightness of the light guide plate with a relatively simple structure. Especially.

【0007】[0007]

【課題を解決するための手段】従って、本発明は、上述
の目的を達成するために、導光板と、導光板の下面側に
配置した反射シ−トと、導光板の少なくとも一方の端面
側に配置した蛍光ランプと、内面に高反射層を有し、か
つ蛍光ランプの、導光板の一方の端面と対向する側を除
く部分をほぼ囲繞したランプハウスとを具備し、前記反
射シ−トの非導光板側に反射層を形成したものであり、
本発明の第2の発明は、前記反射層を、シ−トの一方の
面に反射性部材を被着して構成したものであり、第3の
発明は、前記反射シ−トに拡散反射性を付与したもので
あり、又、第4の発明は、前記高反射層を銀にて形成し
たことを特徴とする。
Therefore, in order to achieve the above-mentioned object, the present invention provides a light guide plate, a reflection sheet arranged on the lower surface side of the light guide plate, and at least one end surface side of the light guide plate. And a lamp house which has a high reflection layer on the inner surface and substantially surrounds the portion of the fluorescent lamp except the side facing the one end surface of the light guide plate. Of which a reflective layer is formed on the non-light guide plate side,
A second invention of the present invention is configured such that the reflective layer is coated with a reflective member on one surface of the sheet, and the third invention is a diffuse reflection on the reflective sheet. Further, the fourth invention is characterized in that the high reflection layer is formed of silver.

【0008】さらに、本発明の第5の発明は、導光板
と、導光板の下面側に配置した反射シ−トと、反射シ−
トの非導光板側に設けた反射層と、導光板の少なくとも
一方の端面側に配置した直管形の蛍光ランプと、内面に
高反射層を有し、かつ蛍光ランプの、導光板の一方の端
面と対向する側を除く部分をほぼ囲繞したランプハウス
とを具備し、前記反射シ−トを導光板の一方の端面側に
突出するように位置させると共に、この突出部分にラン
プハウスの一方の端部を重ね合わせたことを特徴とす
る。
Furthermore, a fifth aspect of the present invention is a light guide plate, a reflection sheet disposed on the lower surface side of the light guide plate, and a reflection sheet.
Of the light guide plate of the fluorescent lamp having a reflective layer provided on the non-light guide plate side of the light guide, a straight tube fluorescent lamp arranged on at least one end surface side of the light guide plate, and a highly reflective layer on the inner surface. Of the lamp house substantially surrounding a portion other than the end face of the lamp house, the reflection sheet is positioned so as to project to one end face side of the light guide plate, and one of the lamp house It is characterized by overlapping the ends of.

【0009】[0009]

【作用】この構成によれば、導光板の下面側に配置され
ている反射シ−トに反射層が積層されている関係で、導
光板から漏れた光が反射シ−トを透過してもその大部分
は反射層で反射されて導光板に戻される。従って、蛍光
ランプから放射された光は、有効に利用される結果、導
光板における輝度を効果的に高めることができ、優れた
表示機能が期待できる。
According to this structure, even if the light leaking from the light guide plate passes through the reflection sheet, the reflection layer is laminated on the reflection sheet disposed on the lower surface side of the light guide plate. Most of it is reflected by the reflective layer and returned to the light guide plate. Therefore, the light emitted from the fluorescent lamp is effectively used, and as a result, the brightness of the light guide plate can be effectively increased, and an excellent display function can be expected.

【0010】[0010]

【実施例】次に、本発明の1実施例について図1〜図2
を参照して説明する。尚、図4に示す従来例と同一部分
には同一参照符合を付し、その詳細な説明は省略する。
同図において、本発明の特徴部分は、反射シ−ト2の非
導光板側に反射層8を設けることである。その上、付加
的には、蛍光ランプ5をほぼ囲繞するランプハウス6の
一方の端部6aを導光板1の端面側(1a)に配置する
と共に、一方の端部6aの裏面側に、導光板1の下面側
に配置される反射シ−ト2を重ね合わせるように配置し
たことである。図示例では、反射シ−ト2に積層される
反射層8にはアルミニウムの蒸着シ−トが利用されてい
るが、白色塗料,白色顔料などを塗装したり、白色紙を
貼りつけたり、或いは反射シ−ト2を1層ないし複数層
積層することもできる。
DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, one embodiment of the present invention will be described with reference to FIGS.
Will be described with reference to. The same parts as those in the conventional example shown in FIG. 4 are designated by the same reference numerals, and detailed description thereof will be omitted.
In the figure, the characteristic part of the present invention is to provide the reflection layer 8 on the non-light guide plate side of the reflection sheet 2. Furthermore, in addition, one end 6a of the lamp house 6 that substantially surrounds the fluorescent lamp 5 is arranged on the end face side (1a) of the light guide plate 1, and the other end 6a is connected to the back side of the end 6a. That is, the reflection sheet 2 arranged on the lower surface side of the optical plate 1 is arranged so as to be overlapped. In the illustrated example, a vapor deposition sheet of aluminum is used for the reflection layer 8 laminated on the reflection sheet 2, but white paint, white pigment, etc. may be applied, white paper may be attached, or reflection may be performed. The sheet 2 may be laminated in one layer or a plurality of layers.

【0011】又、導光板1の他方の端面1bには、下面
側と同様に、反射シ−ト21が配置されており、それの
非導光板側には反射層81が設けられている。尚、反射
シ−ト2と反射シ−ト21及び反射層8と反射層81は
それぞれ同一の部材にて構成されているが、異なった部
材にて構成することもできる。特に、反射シ−ト2は導
光板1の端面1a側に一定長さだけ突出(2a)されて
おり、この突出部2aがランプハウス6の一方の端部6
aの裏面側に重ね合わされている。尚、反射シ−ト2に
は、光がランダムに拡散(散乱)するような反射機能を
付与することが望ましい。
A reflecting sheet 21 is arranged on the other end face 1b of the light guide plate 1 as in the lower surface side, and a reflecting layer 81 is provided on the non-light guide plate side thereof. Although the reflection sheet 2 and the reflection sheet 21 and the reflection layer 8 and the reflection layer 81 are made of the same member, they may be made of different members. In particular, the reflection sheet 2 is projected (2a) to the end surface 1a side of the light guide plate 1 by a certain length, and this projection 2a is one end 6 of the lamp house 6.
It is superposed on the back side of a. It is desirable that the reflection sheet 2 be provided with a reflection function that diffuses (scatters) light randomly.

【0012】この実施例によれば、導光板1の下面側に
配置されている反射シ−ト2に反射層8が積層されてい
る関係で、導光板1から漏れた光が反射シ−ト2を透過
してもその大部分は反射層8で反射されて導光板1に戻
される。従って、蛍光ランプ5から放射された光は、有
効に利用される結果、導光板1における輝度を効果的に
高めることができ、優れた表示機能が期待できる。
According to this embodiment, the light leaking from the light guide plate 1 is reflected by the reflection sheet 2 because the reflection layer 8 is laminated on the reflection sheet 2 arranged on the lower surface side of the light guide plate 1. Even though the light passes through 2, most of it is reflected by the reflective layer 8 and returned to the light guide plate 1. Therefore, the light emitted from the fluorescent lamp 5 is effectively used, and as a result, the brightness of the light guide plate 1 can be effectively increased, and an excellent display function can be expected.

【0013】又、仮にランプハウス6の端部6aと端面
1aとの間に隙間が形成されても、その下側には反射シ
−ト2の突出部2a及び反射層8の突出部8aが位置し
ているために、光が反射層8の背面側に漏れることはな
く、光の有効利用を図ることができる。尚、端部6aの
下側に配置されている反射シ−ト部分は、反射シ−ト2
を延在させる他、反射シ−ト2とほぼ同等の反射率を有
する別の反射シ−トないし反射部材を配設しても同様の
効果が得られる。
Even if a gap is formed between the end 6a of the lamp house 6 and the end face 1a, the protrusion 2a of the reflection sheet 2 and the protrusion 8a of the reflection layer 8 are formed below the gap. Since it is located, the light does not leak to the back surface side of the reflective layer 8, and the light can be effectively used. Incidentally, the reflection sheet portion arranged below the end portion 6a is the reflection sheet 2
The same effect can be obtained by providing another reflection sheet or a reflection member having a reflectance substantially equal to that of the reflection sheet 2 in addition to extending the above.

【0014】さらには、導光板1の他方の端面1bにも
反射シ−ト21及び反射層81が配置されているため
に、上述の構成と相俟って光の利用率を改善できる。
Furthermore, since the reflection sheet 21 and the reflection layer 81 are also arranged on the other end surface 1b of the light guide plate 1, the utilization factor of light can be improved in combination with the above-mentioned configuration.

【0015】次に、本発明者らは、バルブ外径が2.5
mmの冷陰極蛍光ランプを厚さが4mmのアクリル樹脂
よりなる導光板の一方の端面側に、1.9mmの間隔を
隔てて配置し、この蛍光ランプの外周に内面に銀蒸着に
よる高反射層を有するランプハウスを、蛍光ランプとの
間隔が1mmとなるように配置し、かつ導光板の下面に
東レ株式会社から発売されている発泡ペットE60L
(PET:ポリエチレンテレフタレ−ト)を反射シ−ト
として配置すると共に、端面側に3mm突出してランプ
ハウスの一方の端部の裏面側に重ね合わせ、その上、反
射シ−トの背面側にアルミ箔よりなる反射層を積層して
なるバックライト装置と、導光板の下面側に単に発泡ペ
ットE60Lのみを配置した従来のバックライト装置に
ついて導光板の輝度を比較したところ、本発明品は31
04cd/m2 、従来品は3021cd/m2 であっ
た。即ち、本発明品は従来品に比較して2.7%輝度が
高くなった。
Next, the present inventors have found that the valve outer diameter is 2.5.
mm cold cathode fluorescent lamps are arranged on one end surface side of a light guide plate made of acrylic resin having a thickness of 4 mm with a space of 1.9 mm, and a high reflection layer formed by vapor deposition of silver on the inner surface of the outer circumference of the fluorescent lamp. A foam house E60L that is placed by Toray Industries Co., Ltd. on the lower surface of the light guide plate, with the lamp house having
(PET: Polyethylene terephthalate) is arranged as a reflection sheet, and it is projected on the end face side by 3 mm and overlapped on the back side of one end of the lamp house, and on the back side of the reflection sheet. When the brightness of the light guide plate is compared between the backlight device formed by laminating the reflection layer made of aluminum foil and the conventional backlight device in which only the foamed PET E60L is disposed on the lower surface side of the light guide plate, the product of the present invention is 31
It was 04 cd / m 2 and that of the conventional product was 3021 cd / m 2 . That is, the brightness of the product of the present invention was 2.7% higher than that of the conventional product.

【0016】図3は、本発明の他の実施例を示すもので
あって、基本的な構成は上記実施例とほぼ同様である。
異なる点は、主として導光板1の他方の端面1b側に蛍
光ランプ5及び内面に高反射層7を有するランプハウス
6をほぼ対称的に設けたことである。この実施例によれ
ば、導光板1に入射される光量が増加するために、反射
シ−ト2を透過する光量も増加するのであるが、反射層
8の配置によって透過光を有効に導光板側に戻すことが
でき、輝度の向上に寄与する。
FIG. 3 shows another embodiment of the present invention, and the basic constitution is almost the same as that of the above embodiment.
The different point is that the fluorescent lamp 5 and the lamp house 6 having the highly reflective layer 7 on the inner surface are provided substantially symmetrically mainly on the other end surface 1b side of the light guide plate 1. According to this embodiment, since the amount of light incident on the light guide plate 1 is increased, the amount of light transmitted through the reflection sheet 2 is also increased. However, the arrangement of the reflective layer 8 effectively guides the transmitted light. It can be returned to the side, which contributes to the improvement of brightness.

【0017】尚、本発明は、何ら上記実施例にのみ制約
されることなく、例えば蛍光ランプは直管形の他、L
形,コ字形にすることもできるが、この場合には導光板
の複数の端面に対向して配置されることになる。又、導
光板の端面に対向する高反射層部分に、蛍光ランプのバ
ルブ外径の60〜140%の範囲に設定された幅を有す
る拡散反射層を形成することもできる。
The present invention is not limited to the above-mentioned embodiment at all. For example, a fluorescent lamp is a straight tube type, and an L type lamp.
The light guide plate may have a shape or a U shape, but in this case, the light guide plate is arranged so as to face a plurality of end faces. Further, a diffuse reflection layer having a width set in the range of 60 to 140% of the bulb outer diameter of the fluorescent lamp can be formed on the high reflection layer portion facing the end surface of the light guide plate.

【0018】[0018]

【発明の効果】以上のように、本発明によれば、導光板
の下面側に配置されている反射シ−トに反射層が積層さ
れている関係で、導光板1から漏れた光が反射シ−トを
透過してもその大部分は反射層で反射されて導光板に戻
される。従って、蛍光ランプから放射された光は、有効
に利用される結果、導光板における輝度を効果的に高め
ることができ、優れた表示機能が期待できる。
As described above, according to the present invention, the light leaked from the light guide plate 1 is reflected because the reflection layer is laminated on the reflection sheet arranged on the lower surface side of the light guide plate. Even if the light passes through the sheet, most of it is reflected by the reflective layer and returned to the light guide plate. Therefore, the light emitted from the fluorescent lamp is effectively used, and as a result, the brightness of the light guide plate can be effectively increased, and an excellent display function can be expected.

【0019】又、仮にランプハウスの一方の端部と導光
板の一方の端面との間に隙間が形成されても、その下側
には反射シ−ト及び反射層の突出部が位置しているため
に、光が反射層の背面側に漏れることはなく、光の有効
利用を図ることができる。
Even if a gap is formed between one end of the lamp house and one end of the light guide plate, the reflection sheet and the protrusion of the reflection layer are located below the gap. Therefore, the light does not leak to the back side of the reflective layer, and the light can be effectively used.

【0020】さらには、導光板の一方の端面を除くすべ
ての端面に反射シ−ト及び反射層を配置すれば、導光板
から漏れる光を著しく抑制できるために、導光板の下面
側に反射シ−ト及び反射層を配置する構成と相俟って光
の利用率を一層高めることができる。
Furthermore, by disposing a reflection sheet and a reflection layer on all the end faces of the light guide plate except one end face, the light leaking from the light guide plate can be remarkably suppressed, so that the reflection sheet on the lower face side of the light guide plate is suppressed. -In combination with the structure in which the light emitting device and the reflective layer are arranged, the light utilization rate can be further increased.

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

【図1】本発明の1実施例を示す側断面図。FIG. 1 is a side sectional view showing an embodiment of the present invention.

【図2】図1の下面図。FIG. 2 is a bottom view of FIG.

【図3】本発明の他の実施例を示す側断面図。FIG. 3 is a side sectional view showing another embodiment of the present invention.

【図4】従来例の側断面図。FIG. 4 is a side sectional view of a conventional example.

【符号の説明】[Explanation of symbols]

1 導光板 1a 一方の端面 1b 他方の端面 2,21 反射シ−ト 2a,8a 突出部 3 拡散シ−ト 5 蛍光ランプ 6 ランプハウス 6a 一方の端部 7 高反射層 8,81 反射層 1 Light guide plate 1a One end surface 1b The other end surface 2,21 Reflection sheet 2a, 8a Projection part 3 Diffusion sheet 5 Fluorescent lamp 6 Lamp house 6a One end part 7 High reflection layer 8,81 Reflection layer

Claims (5)

【特許請求の範囲】[Claims] 【請求項1】 導光板と、導光板の下面側に配置した反
射シ−トと、導光板の少なくとも一方の端面側に配置し
た蛍光ランプと、内面に高反射層を有し、かつ蛍光ラン
プの、導光板の一方の端面と対向する側を除く部分をほ
ぼ囲繞したランプハウスとを具備し、前記反射シ−トの
非導光板側に反射層を形成したことを特徴とするバック
ライト装置。
1. A fluorescent lamp having a light guide plate, a reflection sheet arranged on a lower surface side of the light guide plate, a fluorescent lamp arranged on at least one end face side of the light guide plate, and a highly reflective layer on an inner surface. And a lamp house that substantially surrounds a portion of the light guide plate other than the side facing the one end face, and a reflection layer is formed on the non-light guide plate side of the reflection sheet. .
【請求項2】 前記反射層を、シ−トの一方の面に反射
性部材を被着して構成したことを特徴とする請求項1記
載のバックライト装置。
2. The backlight device according to claim 1, wherein the reflective layer is formed by coating a reflective member on one surface of the sheet.
【請求項3】 前記反射シ−トに拡散反射性を付与した
ことを特徴とする請求項1記載のバックライト装置。
3. The backlight device according to claim 1, wherein the reflective sheet is provided with diffuse reflectivity.
【請求項4】 前記高反射層を銀にて形成したことを特
徴とする請求項1記載のバックライト装置。
4. The backlight device according to claim 1, wherein the highly reflective layer is made of silver.
【請求項5】 導光板と、導光板の下面側に配置した反
射シ−トと、反射シ−トの非導光板側に設けた反射層
と、導光板の少なくとも一方の端面側に配置した直管形
の蛍光ランプと、内面に高反射層を有し、かつ蛍光ラン
プの、導光板の一方の端面と対向する側を除く部分をほ
ぼ囲繞したランプハウスとを具備し、前記反射シ−トを
導光板の一方の端面側に突出するように位置させると共
に、この突出部分にランプハウスの一方の端部を重ね合
わせたことを特徴とするバックライト装置。
5. A light guide plate, a reflection sheet arranged on the lower surface side of the light guide plate, a reflection layer provided on the non-light guide plate side of the reflection sheet, and arranged on at least one end face side of the light guide plate. A straight tube type fluorescent lamp, and a lamp house which has a highly reflective layer on its inner surface and substantially surrounds a portion of the fluorescent lamp excluding the side facing the one end surface of the light guide plate. The backlight device is characterized in that the lamp is positioned so as to project to one end surface side of the light guide plate, and one end portion of the lamp house is overlapped with this projecting portion.
JP14277195A 1995-06-09 1995-06-09 Back light device Withdrawn JPH08335048A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14277195A JPH08335048A (en) 1995-06-09 1995-06-09 Back light device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14277195A JPH08335048A (en) 1995-06-09 1995-06-09 Back light device

Publications (1)

Publication Number Publication Date
JPH08335048A true JPH08335048A (en) 1996-12-17

Family

ID=15323211

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14277195A Withdrawn JPH08335048A (en) 1995-06-09 1995-06-09 Back light device

Country Status (1)

Country Link
JP (1) JPH08335048A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004296345A (en) * 2003-03-27 2004-10-21 Toto Ltd Surface light emitting device
US7160019B1 (en) 1999-08-11 2007-01-09 Seiko Epson Corporation Side-lighting type surface light source device, method for manufacturing the same, electrooptical apparatus, and electronic equipment
JP2007019024A (en) * 2005-07-06 2007-01-25 Samsung Electro Mech Co Ltd Light source-light guide plate structure for backlight device in which led light source is inserted into light guide plate, and backlight device including same
KR100682337B1 (en) * 2000-03-16 2007-02-15 삼성전자주식회사 LCD and manufacturing method for lamp reflector used for LCD
US7446829B2 (en) 2002-09-30 2008-11-04 Sharp Kabushiki Kaisha Backlight unit and liquid crystal display unit using backlight unit
US9671546B2 (en) 2014-02-05 2017-06-06 Samsung Display Co., Ltd. Backlight assembly and display device having the same

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7160019B1 (en) 1999-08-11 2007-01-09 Seiko Epson Corporation Side-lighting type surface light source device, method for manufacturing the same, electrooptical apparatus, and electronic equipment
KR100682337B1 (en) * 2000-03-16 2007-02-15 삼성전자주식회사 LCD and manufacturing method for lamp reflector used for LCD
US7446829B2 (en) 2002-09-30 2008-11-04 Sharp Kabushiki Kaisha Backlight unit and liquid crystal display unit using backlight unit
JP2008270214A (en) * 2002-09-30 2008-11-06 Sharp Corp Backlight unit and liquid crystal display using backlight
JP2004296345A (en) * 2003-03-27 2004-10-21 Toto Ltd Surface light emitting device
JP2007019024A (en) * 2005-07-06 2007-01-25 Samsung Electro Mech Co Ltd Light source-light guide plate structure for backlight device in which led light source is inserted into light guide plate, and backlight device including same
JP4728183B2 (en) * 2005-07-06 2011-07-20 サムソン エルイーディー カンパニーリミテッド. Light source-light guide plate structure of backlight device in which LED light source is inserted into light guide plate and backlight device including the same
US9671546B2 (en) 2014-02-05 2017-06-06 Samsung Display Co., Ltd. Backlight assembly and display device having the same

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Effective date: 20020903