JPH0561045A - Surface light source device and production thereof - Google Patents
Surface light source device and production thereofInfo
- Publication number
- JPH0561045A JPH0561045A JP3244929A JP24492991A JPH0561045A JP H0561045 A JPH0561045 A JP H0561045A JP 3244929 A JP3244929 A JP 3244929A JP 24492991 A JP24492991 A JP 24492991A JP H0561045 A JPH0561045 A JP H0561045A
- Authority
- JP
- Japan
- Prior art keywords
- light
- light source
- guide plate
- light guide
- source device
- 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
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 13
- 230000005540 biological transmission Effects 0.000 claims abstract description 35
- 239000011324 bead Substances 0.000 claims abstract description 15
- 229920005989 resin Polymers 0.000 claims abstract description 9
- 239000011347 resin Substances 0.000 claims abstract description 9
- 238000000034 method Methods 0.000 claims abstract description 7
- 238000001746 injection moulding Methods 0.000 claims abstract description 5
- 238000009792 diffusion process Methods 0.000 claims description 35
- 239000010410 layer Substances 0.000 description 16
- 239000012790 adhesive layer Substances 0.000 description 3
- -1 polyethylene terephthalate Polymers 0.000 description 3
- 239000011521 glass Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229920000298 Cellophane Polymers 0.000 description 1
- 239000004593 Epoxy Substances 0.000 description 1
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 1
- VVQNEPGJFQJSBK-UHFFFAOYSA-N Methyl methacrylate Chemical compound COC(=O)C(C)=C VVQNEPGJFQJSBK-UHFFFAOYSA-N 0.000 description 1
- 239000004677 Nylon Substances 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 238000010894 electron beam technology Methods 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 229920006255 plastic film Polymers 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920000139 polyethylene terephthalate Polymers 0.000 description 1
- 239000005020 polyethylene terephthalate Substances 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229920005992 thermoplastic resin Polymers 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
Landscapes
- Liquid Crystal (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
- Light Guides In General And Applications Therefor (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】この発明は、輝度の高い面光源装
置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a surface light source device having high brightness.
【０００２】[0002]
【従来の技術】従来、液晶パネルのバックライトなどに
用いられる薄型の面光源装置として、導光板の一側面に
線光源を配置し、導光板の裏面に光拡散透過部を設けた
ものがある。このような構成の面光源装置は、光源が１
つであるため消費電力が少なく、また軽量であるという
特長を有する。しかし、光源が導光板の一側面に配置さ
れているので、光源から離れた箇所では光量が不足しが
ちであり、少しでも明るくするために、いろいろな工夫
がなされている。たとえば、導光板裏面に光拡散透過部
として微細な多数のドットを印刷法などで形成し、各ド
ットの面積を大小に変化させて光拡散透過部の面積率
を、一側面から離れるにしたがって次第に大きくするよ
うに構成した面光源装置がある。2. Description of the Related Art Conventionally, as a thin surface light source device used for a backlight of a liquid crystal panel, there is a thin surface light source device in which a linear light source is arranged on one side surface of a light guide plate and a light diffusion / transmission part is provided on the back surface of the light guide plate. .. The surface light source device having such a configuration has one light source.
Therefore, it has low power consumption and is lightweight. However, since the light source is arranged on one side surface of the light guide plate, the amount of light tends to be insufficient at a position away from the light source, and various measures have been taken to make the light as bright as possible. For example, a large number of fine dots are formed as a light diffusion / transmission part on the back surface of the light guide plate by a printing method or the like, and the area of each dot is changed in size to gradually increase the area ratio of the light diffusion / transmission part as the distance from one side increases. There is a surface light source device configured to be large.
【０００３】[0003]
【発明が解決しようとする課題】しかし、上記の構成の
面光源装置は、光拡散透過部が導光板の裏側の表面上に
形成されているため、光の反射効率が悪く、十分な輝度
が得られないものであった。したがって、この発明は上
記のような欠点を解消し、輝度の高い面光源装置を提供
することを目的とする。However, in the surface light source device having the above structure, since the light diffusion / transmission part is formed on the surface on the back side of the light guide plate, the light reflection efficiency is poor and sufficient brightness is not obtained. It was something I couldn't get. Therefore, it is an object of the present invention to solve the above drawbacks and provide a surface light source device having high brightness.
【０００４】[0004]
【課題を解決するための手段】この発明は、以上の目的
を達成するために、透明な導光板の一側面に線光源を配
置し、線光源から遠ざかるにしたがってドットが大きく
なるように導光板の裏面に光拡散透過部を設け、線光源
からの光を利用して導光板の表面を均一に照射させる面
光源装置において、光拡散透過部がビーズを含有し導光
板内部に埋められるように面光源装置を構成したもので
ある。In order to achieve the above-mentioned object, the present invention provides a light guide plate in which a linear light source is arranged on one side surface of a transparent light guide plate so that the dots become larger as the distance from the line light source increases. In a surface light source device in which a light diffusion / transmission part is provided on the back surface of the light source to uniformly illuminate the surface of the light guide plate using light from a linear light source, the light diffusion / transmission part contains beads and is embedded inside the light guide plate. This is a surface light source device.
【０００５】また、ベースフィルムの片面にビーズを含
有するインキにより光拡散透過部が形成された転写シー
トを、射出成形用金型内に固定し、透明な樹脂を射出す
ることによって光拡散透過部を導光板内部に埋めるよう
に導光板を形成するように面光源装置の製造方法を構成
したものである。Further, a transfer sheet having a light diffusion / transmission part formed of ink containing beads on one surface of a base film is fixed in an injection molding die, and a transparent resin is injected to the light diffusion / transmission part. The method for manufacturing a surface light source device is configured such that the light guide plate is formed so as to be embedded inside the light guide plate.
【０００６】[0006]
【作用】上記の構成によれば、線光源の付近では、線光
源より照射された大部分の光が、導光板の内部で入射角
と反射角とが等しい全反射を繰り返し、導光板の奥へ導
かれる。一方、残りの光の一部は、光拡散透過部で散乱
して直接的に導光板の表面側に導かれ、また残りの光の
他の一部は、間接的に導光板の表面側に導かれる。拡散
透過部は、ビーズを含有し、導光板の内部に存在するの
で、光の拡散が十分に行われ、高い輝度が得られる。According to the above construction, in the vicinity of the linear light source, most of the light emitted from the linear light source repeats total reflection inside the light guide plate with the incident angle and the reflection angle being equal to each other, so that Be led to. On the other hand, a part of the remaining light is scattered by the light diffusion / transmission part and is directly guided to the surface side of the light guide plate, and another part of the remaining light is indirectly directed to the surface side of the light guide plate. Be guided. Since the diffusion / transmission part contains beads and exists inside the light guide plate, the light is sufficiently diffused and high brightness is obtained.
【０００７】[0007]
【実施例】図面を参照しながらこの発明の実施例をさら
に詳しく説明する。図１はこの発明の面光源装置の一実
施例を示す断面図である。図２はこの発明の面光源装置
の製造方法に用いる転写シートの一実施例を示す断面図
である。図３はこの発明の面光源装置の製造方法の一実
施例を示す断面図である。図４はこの発明の面光源装置
の製造方法の一実施例を示す断面図である。１は導光
板、２は線光源、３は光拡散透過部、４は側面反射層、
５は背面反射層、６は拡散板、１０は転写シート、１１
はベースフィルム、１２は剥離層、１３は光拡散透過
部、１４は接着層、１５は金型をそれぞれ示す。Embodiments of the present invention will be described in more detail with reference to the drawings. FIG. 1 is a sectional view showing an embodiment of the surface light source device of the present invention. FIG. 2 is a sectional view showing an embodiment of a transfer sheet used in the method of manufacturing the surface light source device of the present invention. FIG. 3 is a sectional view showing an embodiment of the method of manufacturing the surface light source device of the present invention. FIG. 4 is a sectional view showing an embodiment of the method of manufacturing the surface light source device of the present invention. 1 is a light guide plate, 2 is a linear light source, 3 is a light diffusion / transmission part, 4 is a side reflection layer,
5 is a back reflection layer, 6 is a diffusion plate, 10 is a transfer sheet, 11
Is a base film, 12 is a release layer, 13 is a light diffusion / transmission part, 14 is an adhesive layer, and 15 is a mold.
【０００８】この実施例における面光源装置は、図１に
示すように、長方形の導光板１の側面に線光源２を配置
し、導光板１の裏面には光拡散透過部３が形成されてい
る。In the surface light source device of this embodiment, as shown in FIG. 1, a linear light source 2 is arranged on the side surface of a rectangular light guide plate 1, and a light diffusion / transmission part 3 is formed on the back surface of the light guide plate 1. There is.
【０００９】導光板１としては、厚さ1〜30mm程度の透
明な長方形板材が好ましい。導光板１の材料としては、
アクリル・ポリカーボネート・ポリ塩化ビニルなどの樹
脂やガラスなどを用いるとよい。The light guide plate 1 is preferably a transparent rectangular plate material having a thickness of about 1 to 30 mm. As the material of the light guide plate 1,
A resin such as acrylic, polycarbonate, or polyvinyl chloride, or glass may be used.
【００１０】光拡散透過部３は、導光板１内部にビーズ
を含有するように形成される。導光板１の内部に光拡散
透過部３を形成するには、次のような方法で行うとよ
い。まず、ベースフィルム１１の片面にビーズを含有す
るインキにより光拡散透過部１３が形成された転写シー
ト１０を用意する（図２参照）。ベースフィルム１１と
しては、ポリエチレンテレフタレートやポリプロピレン
・ポリエチレン・ナイロン・セロハンなどのプラスチッ
クフィルム、あるいはこれらと紙との複合フィルムなど
を使用するとよい。つぎに、必要に応じて剥離層１２を
形成する。剥離層１２としては、熱可塑性樹脂、または
ウレタン、エポキシなどの熱硬化性樹脂、あるいはメチ
ルメタアクリレートなどの紫外線／電子線硬化性樹脂な
どを用いる。次に、光拡散透過部１３を形成する。光拡
散透過部１３は、ビーズを含有するものである。ビーズ
としては、直径5〜30μm程度のガラスビーズやプラスチ
ックビーズなどであり、これらを含むインキを印刷法に
よりドット状に形成する。光拡散透過部３は、光源から
の輝度変化に応じて適宜面積率が変化するように形成す
る。通常は、線光源２から遠ざかるにつれて輝度に反比
例して大きくなるように形成する。また、必要に応じ
て、接着層１４を光拡散透過部１３の上に形成してもよ
い。The light diffusion / transmission part 3 is formed so as to contain beads inside the light guide plate 1. In order to form the light diffusion / transmission part 3 inside the light guide plate 1, the following method may be used. First, the transfer sheet 10 in which the light diffusion / transmission part 13 is formed by the ink containing the beads on one surface of the base film 11 is prepared (see FIG. 2). As the base film 11, a plastic film such as polyethylene terephthalate or polypropylene / polyethylene / nylon / cellophane, or a composite film of these and paper may be used. Next, the release layer 12 is formed as needed. As the release layer 12, a thermoplastic resin, a thermosetting resin such as urethane or epoxy, or an ultraviolet / electron beam curable resin such as methyl methacrylate is used. Next, the light diffusion / transmission part 13 is formed. The light diffusion / transmission part 13 contains beads. The beads include glass beads and plastic beads having a diameter of about 5 to 30 μm, and ink containing these is formed into dots by a printing method. The light diffusion / transmission part 3 is formed so that the area ratio changes appropriately according to the change in luminance from the light source. Usually, it is formed so as to increase in inverse proportion to the brightness as the distance from the linear light source 2 increases. Further, the adhesive layer 14 may be formed on the light diffusion / transmission part 13 as necessary.
【００１１】以上のような構成の転写シート１０を、射
出成形用金型１５内に固定する（図３参照）。次いで、
キャビティ１６内に透明な樹脂を射出して導光板１を成
形する。金型１５を開き、転写シート１０のベースフィ
ルム１１を剥離すると、光拡散透過部３が内部に形成さ
れた導光板１が得られる（図４参照）。The transfer sheet 10 having the above structure is fixed in the injection molding die 15 (see FIG. 3). Then
A transparent resin is injected into the cavity 16 to mold the light guide plate 1. When the mold 15 is opened and the base film 11 of the transfer sheet 10 is peeled off, the light guide plate 1 having the light diffusion / transmission part 3 formed therein is obtained (see FIG. 4).
【００１２】線光源２としては、熱陰極線管や冷陰極線
管など陰極線管を用いるとよい。また、線光源２を覆う
ように湾曲反射板を配置し、線光源２の光を効率よく利
用できるようにしてもよい。As the line light source 2, it is preferable to use a cathode ray tube such as a hot cathode ray tube or a cold cathode ray tube. Further, a curved reflector may be arranged so as to cover the linear light source 2 so that the light from the linear light source 2 can be used efficiently.
【００１３】また、必要に応じて、導光板１の線光源２
に対向する他側面に、側面反射層４を形成するとよい。
側面反射層４は、導光板１の線光源２に対向する他側面
に、白色フィルムや金属板などを貼りつけたり、側面に
直接白色インキを塗布したり金属を蒸着したりして形成
するとよい。If necessary, the linear light source 2 of the light guide plate 1 is also included.
It is advisable to form the side surface reflection layer 4 on the other side surface facing the side surface.
The side surface reflection layer 4 may be formed by attaching a white film, a metal plate, or the like to the other side surface of the light guide plate 1 facing the linear light source 2, or by directly applying a white ink or depositing a metal on the side surface.
【００１４】また、必要に応じて、導光板１の裏面に背
面反射層５を配置してもよい。背面反射層５は、白色フ
ィルムや白色板などを、導光板１の裏面に重ね合わせて
形成するとよい。背面反射層５は導光板１と別体に形成
し、導光板１の光拡散透過部３が形成されていない部分
には密着しないようにし、反射層との間にわずかな透き
間が形成されるようにする。通常は、導光板１に背面反
射層５を重ねるだけでよい。If necessary, a back reflection layer 5 may be arranged on the back surface of the light guide plate 1. The back reflective layer 5 may be formed by stacking a white film or a white plate on the back surface of the light guide plate 1. The back reflection layer 5 is formed separately from the light guide plate 1 so as not to adhere to a portion of the light guide plate 1 where the light diffusion / transmission part 3 is not formed, and a slight gap is formed between the back reflection layer 5 and the reflection layer. To do so. Normally, it suffices to simply stack the back reflection layer 5 on the light guide plate 1.
【００１５】また、必要に応じて、導光板１の表側に拡
散板６を配置してもよい。拡散板６は導光板１に密着さ
せないように配置するとよい。拡散板６を導光板１に密
着させないことにより、導光板１の内部で全反射が確保
され、導光板１内部でのロスが少ない。拡散板６として
は、光拡散物質が塗布されたフィルム、それ自体が拡散
性を有するフィルム、乳白色の樹脂板などを使用するこ
とができる。If necessary, the diffusion plate 6 may be arranged on the front side of the light guide plate 1. The diffusion plate 6 may be arranged so as not to be in close contact with the light guide plate 1. Since the diffusion plate 6 is not brought into close contact with the light guide plate 1, total reflection is ensured inside the light guide plate 1, and the loss inside the light guide plate 1 is small. As the diffusing plate 6, a film coated with a light diffusing substance, a film having a diffusing property itself, a milky white resin plate, or the like can be used.
【００１６】[0016]
【発明の効果】この発明の面光源装置は、透明な導光板
の一側面に線光源を配置し、線光源から遠ざかるにした
がってドットが大きくなるように導光板の裏面に光拡散
透過部を設け、線光源からの光を利用して導光板の表面
を均一に照射させる面光源装置において、光拡散透過部
がビーズを含有し導光板内部に埋められるように形成さ
れるように構成されている。したがって、この発明の面
光源装置は、光の拡散反射効率が大きく、光ロスが少な
くなるので、輝度が高い明るいものとなる。According to the surface light source device of the present invention, the line light source is arranged on one side surface of the transparent light guide plate, and the light diffusion / transmission part is provided on the back surface of the light guide plate so that the dots become larger as the distance from the line light source increases. In a surface light source device that uniformly irradiates the surface of a light guide plate using light from a linear light source, the light diffusion / transmission part is formed to contain beads and be embedded inside the light guide plate. .. Therefore, the surface light source device of the present invention has a large diffuse reflection efficiency of light and a small light loss, and thus has high brightness and high brightness.
【００１７】また、この発明の面光源装置の製造方法
は、ベースフィルムの片面にビーズを含有するインキに
より光拡散透過部が形成された転写シートを、射出成形
用金型内に固定し、透明な樹脂を射出することによって
光拡散透過部を導光板内部に埋めて導光板を形成するよ
うに構成されている。したがって、この発明の面光源装
置の製造方法は、工程数が少ないので大量生産に敵して
おり、面光源装置を容易に得ることができる。Further, in the method for manufacturing the surface light source device of the present invention, the transfer sheet having the light diffusion / transmission part formed by the ink containing the beads on one surface of the base film is fixed in the injection molding die to be transparent. By injecting such a resin, the light diffusion / transmission part is embedded inside the light guide plate to form the light guide plate. Therefore, the method of manufacturing the surface light source device of the present invention has a small number of steps and is suitable for mass production, and the surface light source device can be easily obtained.
【図１】この発明の面光源装置の一実施例を示す断面図
である。FIG. 1 is a sectional view showing an embodiment of a surface light source device of the present invention.
【図２】この発明の面光源装置の製造方法に用いる転写
シートの一実施例を示す断面図である。FIG. 2 is a cross-sectional view showing an example of a transfer sheet used in the method of manufacturing the surface light source device of the present invention.
【図３】この発明の面光源装置の製造方法の一実施例を
示す断面図である。FIG. 3 is a cross-sectional view showing one embodiment of the method of manufacturing the surface light source device of the present invention.
【図４】この発明の面光源装置の製造方法の一実施例を
示す断面図である。FIG. 4 is a cross-sectional view showing an embodiment of the method of manufacturing the surface light source device of the present invention.
１ 導光板 ２ 線光源 ３ 光拡散透過部 ４ 側面反射層 ５ 背面反射層 ６ 拡散板 １０ 転写シート １１ ベースフィルム １２ 剥離層 １３ 光拡散透過部 １４ 接着層 １５ 金型 DESCRIPTION OF SYMBOLS 1 Light guide plate 2 Line light source 3 Light diffusion / transmission part 4 Side reflection layer 5 Back reflection layer 6 Diffusion plate 10 Transfer sheet 11 Base film 12 Release layer 13 Light diffusion / transmission part 14 Adhesive layer 15 Mold
Claims (2)
し、線光源から遠ざかるにしたがってドットが大きくな
るように導光板の裏面に光拡散透過部を設け、線光源か
らの光を利用して導光板の表面を均一に照射させる面光
源装置において、光拡散透過部がビーズを含有し導光板
内部に埋められるように形成されたことを特徴とする面
光源装置。1. A line light source is arranged on one side of a transparent light guide plate, and a light diffusion / transmission part is provided on the back surface of the light guide plate so that the dots become larger as the distance from the line light source increases, and the light from the line light source is used. In the surface light source device that uniformly irradiates the surface of the light guide plate, the light diffusion / transmission part is formed so as to contain beads and be embedded inside the light guide plate.
るインキにより光拡散透過部が形成された転写シート
を、射出成形用金型内に固定し、透明な樹脂を射出する
ことによって光拡散透過部を導光板内部に埋めるように
形成することを特徴とする請求項１記載の面光源装置の
製造方法。2. A light diffusing and transmitting portion is fixed by fixing a transfer sheet having a light diffusing and transmitting portion formed of an ink containing beads on one surface of a base film in an injection molding die and injecting a transparent resin. The method for manufacturing the surface light source device according to claim 1, wherein the light source is formed so as to be embedded in the light guide plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3244929A JP2673323B2 (en) | 1991-08-29 | 1991-08-29 | Light guide plate for surface light source device and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3244929A JP2673323B2 (en) | 1991-08-29 | 1991-08-29 | Light guide plate for surface light source device and manufacturing method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0561045A true JPH0561045A (en) | 1993-03-12 |
| JP2673323B2 JP2673323B2 (en) | 1997-11-05 |
Family
ID=17126070
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3244929A Expired - Fee Related JP2673323B2 (en) | 1991-08-29 | 1991-08-29 | Light guide plate for surface light source device and manufacturing method thereof |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2673323B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007256910A (en) * | 2006-03-24 | 2007-10-04 | Lg Electronics Inc | Surface light source device, backlight unit including the same, and liquid crystal display device including the backlight unit |
| KR20130030443A (en) * | 2011-09-19 | 2013-03-27 | 엘지디스플레이 주식회사 | Backlight unit and liquid crystal display device including the same |
| DE102013007938A1 (en) * | 2013-05-07 | 2014-11-13 | Kobek Siebdruck GmbH & Co. KG | Method for producing a flexible light guide and a light guide produced by the method |
| WO2015136625A1 (en) * | 2014-03-11 | 2015-09-17 | 堺ディスプレイプロダクト株式会社 | Light source apparatus, display apparatus, and light source apparatus manufacturing method |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101366389B1 (en) * | 2012-10-26 | 2014-02-24 | 주식회사 파인텍 | Optical Film, Composite Light Guide Plate, and Backlight Unit Having the Composite Light Guide Plate |
| KR101360218B1 (en) * | 2012-10-26 | 2014-02-11 | 주식회사 파인텍 | Method of fabricating optical film, composite light guide plate, and backlight unit having the composite light guide plate |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04199002A (en) * | 1990-11-29 | 1992-07-20 | Kimoto & Co Ltd | Light guide plate for planar light source |
| JPH07111486A (en) * | 1993-10-13 | 1995-04-25 | Matsushita Electric Ind Co Ltd | Optical transmitter |
-
1991
- 1991-08-29 JP JP3244929A patent/JP2673323B2/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04199002A (en) * | 1990-11-29 | 1992-07-20 | Kimoto & Co Ltd | Light guide plate for planar light source |
| JPH07111486A (en) * | 1993-10-13 | 1995-04-25 | Matsushita Electric Ind Co Ltd | Optical transmitter |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007256910A (en) * | 2006-03-24 | 2007-10-04 | Lg Electronics Inc | Surface light source device, backlight unit including the same, and liquid crystal display device including the backlight unit |
| KR20130030443A (en) * | 2011-09-19 | 2013-03-27 | 엘지디스플레이 주식회사 | Backlight unit and liquid crystal display device including the same |
| DE102013007938A1 (en) * | 2013-05-07 | 2014-11-13 | Kobek Siebdruck GmbH & Co. KG | Method for producing a flexible light guide and a light guide produced by the method |
| DE102013007938B4 (en) | 2013-05-07 | 2019-05-23 | Motherson Innovations Lights GmbH & Co. KG | Flexible light guide and method of making a flexible light guide |
| WO2015136625A1 (en) * | 2014-03-11 | 2015-09-17 | 堺ディスプレイプロダクト株式会社 | Light source apparatus, display apparatus, and light source apparatus manufacturing method |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2673323B2 (en) | 1997-11-05 |
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