JPH06300922A - Edge light type light transmission plate device - Google Patents
Edge light type light transmission plate deviceInfo
- Publication number
- JPH06300922A JPH06300922A JP5084803A JP8480393A JPH06300922A JP H06300922 A JPH06300922 A JP H06300922A JP 5084803 A JP5084803 A JP 5084803A JP 8480393 A JP8480393 A JP 8480393A JP H06300922 A JPH06300922 A JP H06300922A
- Authority
- JP
- Japan
- Prior art keywords
- light
- guide plate
- light guide
- irregular reflection
- reflection
- 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)
- Light Guides In General And Applications Therefor (AREA)
- Liquid Crystal (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、液晶用バックライト、
広告などの看板用バックライト、照明器具などに使用さ
れるエッジライト式導光板装置に関する。The present invention relates to a liquid crystal backlight,
The present invention relates to an edge light type light guide plate device used for a backlight for signs such as advertisements and a lighting device.
【０００２】[0002]
【従来の技術】エッジライト式導光板装置には、図６及
び図７に示すようなものがある。この導光板装置は、ア
クリル樹脂等の透明樹脂よりなる導光板１を備え、導光
板１の一側端面２外方に光源用ランプ３を設け、光源用
ランプ３の光が外部にもれないように光源用ランプ３の
外周を遮光カバー４で覆ったものである。2. Description of the Related Art There are some edge light type light guide plate devices as shown in FIGS. This light guide plate device includes a light guide plate 1 made of a transparent resin such as acrylic resin, a light source lamp 3 is provided outside one end surface 2 of the light guide plate 1, and light from the light source lamp 3 is not exposed to the outside. As described above, the light source lamp 3 is covered with the light shielding cover 4.
【０００３】導光板１の発光面に相当する上面１ａには
拡散板５が設けられ、導光板１の反射面に相当する下面
１ｂには反射板６が設けられている。導光板１の入射面
２以外の端面７は平滑で、この端面７には、表面に銀、
アルミニウム等が蒸着され、裏面に粘着剤層が設けられ
たエッジテープ８が貼着されている。また、導光板１の
反射面１ｂには、反射面１ｂ全体にわたって乱反射部９
が散点状に設けられており、この乱反射部９により、導
光板１の光源３側端面（以下、「入射面」という）２か
ら入射した光が乱反射して発光面１ａ側で発光する。一
般に、発光面１ａでの発光が均一になるように、乱反射
部９は図８に示すようなパターンで設けられている。す
なわち、ランプ３に近い側から遠い側に向けて反射面１
ｂにおける面積占有割合が徐々に大になる勾配パターン
で反射面１ｂ全体にわたって形成されている。A diffusion plate 5 is provided on an upper surface 1a corresponding to the light emitting surface of the light guide plate 1, and a reflecting plate 6 is provided on a lower surface 1b corresponding to the reflection surface of the light guide plate 1. The end surface 7 of the light guide plate 1 other than the incident surface 2 is smooth, and the end surface 7 has silver on the surface.
An edge tape 8 having aluminum or the like vapor-deposited and having a pressure-sensitive adhesive layer provided on the back surface is attached. Further, on the reflecting surface 1b of the light guide plate 1, the irregular reflecting portion 9 is formed over the entire reflecting surface 1b.
Are provided in a scattered shape, and the irregular reflection portion 9 diffusely reflects light incident from the light source 3 side end surface (hereinafter referred to as “incident surface”) 2 of the light guide plate 1 and emits light on the light emitting surface 1a side. In general, the irregular reflection section 9 is provided in a pattern as shown in FIG. 8 so that the light emission on the light emitting surface 1a becomes uniform. That is, from the side close to the lamp 3 to the side far from the reflection surface 1
It is formed over the entire reflecting surface 1b in a gradient pattern in which the area occupation ratio in b gradually increases.
【０００４】このような導光板装置において、導光板１
の入射面２から入射した光源用ランプ３の光は、エッジ
テープ８及び反射板６で反射されながら進み、途中で乱
反射部９に当たった光がここで乱反射されてその乱反射
光を発光面１ａから放出して発光面１ａ側を発光させ
る。In such a light guide plate device, the light guide plate 1
The light of the light source lamp 3 that has entered from the incident surface 2 of the light source advances while being reflected by the edge tape 8 and the reflection plate 6, and the light that hits the irregular reflection portion 9 is diffusely reflected here and the irregular reflection light is emitted from the light emitting surface 1a. And the light is emitted from the light emitting surface 1a side.
【０００５】[0005]
【発明が解決しようとする課題】しかし、平滑な面に貼
付されたエッジテープ８で鏡面反射された光は、一般
に、発光面１ａの中央部で放出されるよりも、エッジテ
ープ８が貼付されている側の端面７側端部で放出される
割合の方が多くなる。このため、発光面１ａの輝度が不
均一になりやすいという問題があった。However, the light specularly reflected by the edge tape 8 attached to the smooth surface is generally attached to the edge tape 8 rather than being emitted at the center of the light emitting surface 1a. The rate of emission at the end portion on the side of the end surface 7 on the side where the amount is increased increases. Therefore, there is a problem that the luminance of the light emitting surface 1a tends to be nonuniform.
【０００６】また、発光面１ａの輝度を均一にするにあ
たっては、発光面１ａ全体における輝度の向上が重要と
なる。さらに、エッジテープ８の貼着は、手作業によっ
て行われているのが現状である。手作業は作業性が悪
く、生産性の向上が図れない。また、作業者の手に付着
した粘着剤が発光板５に付着する場合もあり、かかる場
合には製品不良となる。Further, in order to make the brightness of the light emitting surface 1a uniform, it is important to improve the brightness of the entire light emitting surface 1a. Furthermore, the attachment of the edge tape 8 is currently performed manually. Manual work has poor workability and cannot improve productivity. In addition, the adhesive that adheres to the hand of the operator may adhere to the light emitting plate 5, and in such a case, the product becomes defective.
【０００７】本発明は、このような技術的背景に鑑みて
なされたものであり、その目的とするところは、導光板
装置としての発光面における輝度の均一化及び向上を図
ることができる導光板装置を提供することにある。The present invention has been made in view of the above technical background, and an object of the present invention is to provide a light guide plate capable of uniforming and improving the brightness on the light emitting surface of the light guide plate device. To provide a device.
【０００８】[0008]
【課題を解決するための手段】本発明のエッジライト式
導光板装置は、一面が発光面１１ａとされ他面が反射面
１１ｂとされた導光板１１を備え、前記反射面１１ｂに
は乱反射部１９が散点状に設けられていて、前記乱反射
部１９が、前記導光板１１の端面１２から入射した光を
乱反射させて発光面１１ａ側を発光させるようにした導
光板装置において、前記導光板１１の入射側端面１２以
外の端面１７端部に、乱反射部を有しない乱反射禁止部
２０が設けられていることを特徴とする。The edge light type light guide plate device of the present invention comprises a light guide plate 11 having one surface as a light emitting surface 11a and the other surface as a reflecting surface 11b, and the reflecting surface 11b has an irregular reflection portion. In the light guide plate device, the light guide plates 19 are provided with scattered dots 19, and the diffuse reflection part 19 diffusely reflects the light incident from the end face 12 of the light guide plate 11 to emit light on the light emitting surface 11a side. It is characterized in that an irregular reflection inhibiting portion 20 having no irregular reflection portion is provided at an end portion of the end surface 17 other than the incident side end surface 12 of 11.
【０００９】導光板１１の入射側端面１２以外の端面１
７に、乱反射部１８が設けられていることが好ましい。
また、入射側端面１２以外の端面１７に設けられた乱反
射部１８は、該端面１７に塗布された反射用ペイントで
あることが好ましい。An end surface 1 of the light guide plate 11 other than the incident side end surface 12
It is preferable that the diffused reflection portion 18 is provided in 7.
Further, it is preferable that the irregular reflection portion 18 provided on the end surface 17 other than the incident side end surface 12 is a reflective paint applied to the end surface 17.
【００１０】[0010]
【作用】入射側端面１２以外の端面１７で反射した光
は、該端面１７端部に設けられた乱反射禁止部２０によ
り、当該端面１７端部付近で発光することが抑制され
る。従って、乱反射禁止部２０を調節することにより、
発光面１１ａ全体としての輝度を均一化させることがで
きる。The light reflected by the end face 17 other than the incident end face 12 is prevented from emitting light near the end face 17 by the irregular reflection prohibiting portion 20 provided at the end face 17. Therefore, by adjusting the irregular reflection prohibition unit 20,
The brightness of the entire light emitting surface 11a can be made uniform.
【００１１】また、入射側端面１２以外の端面１７に乱
反射部１８を設けると、当該端面１７の乱反射部１８に
当たった光は乱反射され、その乱反射光が発光面１１ａ
から放出されて発光するので、輝度が向上する。一方、
新たな乱反射部１８が設けられても、乱反射禁止部２０
が端面１７端部付近で異常に発光するのを防止する。よ
って、発光面１１ａにおける輝度が向上すると共に、均
一化が図られる。Further, when the irregular reflection portion 18 is provided on the end face 17 other than the incident side end face 12, the light impinging on the irregular reflection portion 18 of the end face 17 is irregularly reflected, and the irregular reflection light is emitted.
Since the light is emitted from the device to emit light, the brightness is improved. on the other hand,
Even if the new irregular reflection section 18 is provided, the irregular reflection inhibition section 20
To prevent abnormal light emission near the end of the end face 17. Therefore, the brightness on the light emitting surface 11a is improved and the uniformity is achieved.
【００１２】さらに、入射側端面１２以外の端面１７に
反射用ペイントを塗布することにより前記乱反射部１８
が形成された場合、エッジテープの貼着作業が不要にな
るとともに、粘着剤に関わる不良品の発生を防止でき
る。このことは、輝度の均一化、輝度の向上に繋がる。Further, by applying a reflection paint to the end faces 17 other than the incident side end face 12, the irregular reflection portion 18 is formed.
When the film is formed, it is not necessary to attach the edge tape, and it is possible to prevent defective products related to the adhesive. This leads to uniform brightness and improved brightness.
【００１３】[0013]
【実施例】以下に、本発明の一実施例を図１及び図２に
基づいて説明する。図１において、アクリル樹脂等の透
明樹脂よりなる導光板１１の一側端面（入射面）１２外
方に光源用ランプ１３が設けられ、光源用ランプ１３の
光が外部にもれないように光源用ランプ１３の外周は遮
光カバー１４で覆われている。導光板１１の発光面に相
当する上面１１ａには、例えば、ポリカーボネートフィ
ルムよりなる拡散板１５が設けられている。導光板１１
の反射面に相当する下面１１ｂには、乱反射部１９とし
てシリカ、酸化チタン等の拡散材を混入したインクが図
２に示すパターンのようにドット印刷され、さらにポリ
エチレンテレフタレート等の白色フィルムからなる反射
板１６が設けられている。また、導光板１１の入射面１
２以外の端面１７には、乱反射部１８として反射用ペイ
ントが塗布されている。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. In FIG. 1, a light source lamp 13 is provided outside one end surface (incident surface) 12 of a light guide plate 11 made of a transparent resin such as acrylic resin, and the light source lamp 13 is arranged so that light from the light source lamp 13 does not go outside. The outer periphery of the lamp 13 is covered with a light shielding cover 14. A diffusion plate 15 made of, for example, a polycarbonate film is provided on the upper surface 11a corresponding to the light emitting surface of the light guide plate 11. Light guide plate 11
On the lower surface 11b corresponding to the reflection surface of the above, the ink mixed with the diffusion material such as silica and titanium oxide is dot-printed as the pattern shown in FIG. 2 as the irregular reflection part 19, and the reflection is made of the white film such as polyethylene terephthalate. A plate 16 is provided. In addition, the incident surface 1 of the light guide plate 11
Reflection paint is applied to the end faces 17 other than 2 as irregular reflection portions 18.
【００１４】本発明に用いられる反射用ペイントは、ビ
ヒクルに拡散材となる無機系の顔料を分散させたインキ
である。ビヒクルには、導光板１１との接着性が良い有
機系材料が導光板１１の種類により適宜選択される。導
光板１１としてアクリル樹脂板を用いる場合には、アク
リル系樹脂が好ましく用いられる。顔料としては、白色
系（例えば、酸化チタン）が好ましく用いられる。白色
系ペイントは、他の色のペイントに比して反射率が高い
からである。従来のエッジテープの場合には、入射した
光が鏡面反射するのに対し、反射用ペイントを塗布した
場合には、拡散材たる顔料により乱反射する。これによ
り、発光面に対して９０°に近い角度の光量が多くな
り、その乱反射光が発光面１１ａから放出されて発光す
るので、輝度が高くなる。なお、ペイントの塗布方法
は、スクリーン印刷、パッド印刷等の印刷方式、スプレ
ー噴射等の種々の塗布方法を適宜選択できる。The reflective paint used in the present invention is an ink in which an inorganic pigment serving as a diffusing material is dispersed in a vehicle. For the vehicle, an organic material having good adhesiveness to the light guide plate 11 is appropriately selected according to the type of the light guide plate 11. When an acrylic resin plate is used as the light guide plate 11, acrylic resin is preferably used. As the pigment, white type (for example, titanium oxide) is preferably used. This is because white paint has a higher reflectance than paints of other colors. In the case of the conventional edge tape, the incident light is specularly reflected, whereas when the reflection paint is applied, it is diffusely reflected by the pigment as the diffusing material. As a result, the amount of light at an angle close to 90 ° with respect to the light emitting surface increases, and the irregularly reflected light is emitted from the light emitting surface 11a and emits light, resulting in higher brightness. As a method of applying the paint, various printing methods such as screen printing and pad printing, and various spraying methods can be appropriately selected.
【００１５】図２において、反射面１１ｂには、乱反射
部１８たるペイント（以下、単に「ペイント１８」とい
う）の塗布面１７側の端部に、乱反射禁止部２０（図２
中、斜線部分で示す）が設けられている。この乱反射禁
止部２０は、ペイント１８から乱反射された光がさらに
乱反射されて、そこで異常発光するのを防止するために
設けられたもので、この乱反射禁止部２０には、乱反射
部１９のドットが印刷されていない。乱反射禁止部２０
の範囲、すなわち端部からの距離Ｌは反射用ペイントの
種類等により適宜選択されるが、一般に５〜１０ｍｍが
好ましい。In FIG. 2, on the reflecting surface 11b, an irregular reflection inhibiting portion 20 (see FIG. 2) is provided at the end of the irregular reflection portion 18 of the paint (hereinafter simply referred to as "paint 18") on the application surface 17 side.
(Indicated by the shaded area). The irregular reflection prohibiting portion 20 is provided to prevent the light irregularly reflected from the paint 18 from being further irregularly reflected and abnormally emitting light there. Not printed. Diffuse reflection prohibition section 20
The range L, that is, the distance L from the end is appropriately selected depending on the type of the paint for reflection and the like, but is generally preferably 5 to 10 mm.
【００１６】反射面１１ｂの乱反射禁止部２０以外の部
分は、従来と同様のドットパターンを形成してもよい
が、反射面１１ｂ全体における乱反射部１９の面積率は
大きい方が好ましい。例えば、反射面１１ｂにおける乱
反射部１９の面積率の変化割合を、図３に示すように形
成することが好ましい。図３において、従来（破線）の
ドットパターンでは入射面１２側付近での変化割合が大
きくなっているのに対し、本発明（実線）では、入射面
１２付近で面積率が急激に増大するとともに、対向面１
７付近で緩やかになっている。A portion of the reflecting surface 11b other than the irregular reflection inhibiting portion 20 may be formed with a dot pattern similar to the conventional one, but it is preferable that the area ratio of the irregular reflecting portion 19 in the entire reflecting surface 11b is large. For example, it is preferable to form the change rate of the area ratio of the irregular reflection portion 19 on the reflection surface 11b as shown in FIG. In FIG. 3, in the conventional dot line (dotted line), the change rate is large near the incident surface 12, whereas in the present invention (solid line), the area ratio rapidly increases near the incident surface 12. , Facing surface 1
It is getting milder around 7.
【００１７】以上のような構成を有する導光板装置にお
いて、入射面１２から入射した光が、反射板１１ｂで反
射されながら進み、途中で乱反射部１９に当たった光が
ここで乱反射されてその乱反射光を発光面１１ａから放
出して発光面１１ａ側を発光させる。また反射用ペイン
ト１８の塗布面に当たった光が、ここで乱反射されて、
その乱反射光を発光面１１ａから放出して発光面１１ａ
側を発光させる。反射用ペイント１８は発光面１１ａか
ら放出される光量を増加させるので、輝度の向上を図る
ことができる。一方、反射用ペイント１８の塗布面で乱
反射された光のうち、乱反射禁止部２０にあたった光に
ついては、乱反射されることなく導光板１１内を進んで
いくことができるので、ペイント１８塗布面付近での異
常な発光は抑制される。すなわち、乱反射禁止部２０
は、反射用ペイント１８の乱反射光が塗布面付近で異常
に発光するのを抑制するので、輝度の均一性は損なわれ
ずに済む。In the light guide plate device having the above-described structure, the light incident from the incident surface 12 travels while being reflected by the reflection plate 11b, and the light impinging on the irregular reflection portion 19 is diffused and reflected here. Light is emitted from the light emitting surface 11a to cause the light emitting surface 11a side to emit light. In addition, the light hitting the coated surface of the reflective paint 18 is diffusely reflected here,
The diffused reflected light is emitted from the light emitting surface 11a to emit light.
Make the side emit light. Since the reflection paint 18 increases the amount of light emitted from the light emitting surface 11a, the brightness can be improved. On the other hand, of the light diffusely reflected by the coating surface of the reflection paint 18, the light that hits the irregular reflection prohibiting portion 20 can proceed inside the light guide plate 11 without being diffusely reflected. Abnormal light emission in the vicinity is suppressed. That is, the irregular reflection prohibition unit 20
Suppresses the irregularly reflected light of the paint for reflection 18 from abnormally emitting light in the vicinity of the coating surface, so that the uniformity of brightness is not impaired.
【００１８】また、本発明の導光板装置では、エッジテ
ープに代えて反射用ペイント１８を施していることか
ら、従来の貼着作業が不要となり、作業性が向上すると
ともに、粘着剤に関わる不良がなくなる。また、反射用
ペイント１８の塗布作業は印刷又はスプレー等により行
うことができるので、自動化が可能となり、生産性が向
上する。Further, in the light guide plate device of the present invention, since the reflection paint 18 is applied in place of the edge tape, the conventional sticking work is not required, the workability is improved, and a defect related to the adhesive is caused. Disappears. Moreover, since the application work of the reflection paint 18 can be performed by printing, spraying or the like, automation becomes possible and productivity is improved.
【００１９】次に、ペイントを用いた本発明の導光板装
置とエッジテープを用いた従来の導光板装置との輝度の
比較結果を説明する。導光板１１として、アクリル樹脂
（ＰＭＭＡ）製で、厚さ×縦×横が３ｍｍ×２５０ｍｍ
×１５０ｍｍのものを用いた。この導光板１１の長辺の
一側端面１２に管電流が５ｍＡのランプ１３を一本配設
し、ランプ１３が配設されていない側の端面１７に白色
の反射用ペイント１８を塗布した。図４に、本発明の実
施例品における導光板装置の有効発光面上の９点で測定
した輝度を表示する。９点の平均輝度は４６４ｃｄ／ｍ
2 であった。Next, the comparison result of the brightness between the light guide plate device of the present invention using paint and the conventional light guide plate device using the edge tape will be described. The light guide plate 11 is made of acrylic resin (PMMA) and has a thickness x length x width of 3 mm x 250 mm.
The one with × 150 mm was used. One lamp 13 having a tube current of 5 mA was disposed on one end face 12 of the long side of the light guide plate 11, and a white reflection paint 18 was applied to the end face 17 on the side where the lamp 13 was not disposed. FIG. 4 shows the luminance measured at 9 points on the effective light emitting surface of the light guide plate device in the example of the present invention. Average brightness of 9 points is 464 cd / m
Was 2 .
【００２０】一方、従来例品として、ランプが配設され
ていない側の端面に、エッジテープを貼着した導光板装
置について、本発明と同様の条件にて測定した。結果を
図５に示す。９点の平均輝度は４３０ｃｄ／ｍ2 であっ
た。従って、本発明の導光板装置では、平均輝度が１０
％もアップしたことがわかる。なお、上記実施例におい
ては、入射側端面１２以外の端面１７に形成される乱反
射部１８を、反射用ペイントを塗布することにより形成
したが、本発明はこれに限定されるものではなく、端面
１７をマット加工して、それにエッジテープを貼着する
等の他の手段により乱反射部１８を形成してもよい。On the other hand, as a conventional example, a light guide plate device having an edge tape adhered to the end surface on the side where the lamp is not arranged was measured under the same conditions as in the present invention. Results are shown in FIG. The average brightness at 9 points was 430 cd / m 2 . Therefore, in the light guide plate device of the present invention, the average luminance is 10
You can see that the percentage has also increased. In the above embodiment, the irregular reflection portion 18 formed on the end surface 17 other than the incident side end surface 12 is formed by applying the reflection paint, but the present invention is not limited to this and the end surface is not limited to this. The diffused reflection portion 18 may be formed by matting 17 and applying other means such as attaching an edge tape thereto.
【００２１】また、上記実施例の導光板装置は１灯式の
ものであったが、本発明は導光板の対向する長辺側それ
ぞれにランプを配置した２灯式のものにも適用できる。
また、上記実施例では、１灯式の導光板装置において入
射面１２以外の３つの端面１７全てに乱反射部１８を設
けたが、入射面１２の対向面１７のみに乱反射部１８を
設け、他の２つの端面１７は従来通り平滑面とし、その
平滑面にエッジテープを貼着しても、輝度の向上を図る
ことはできる。Further, although the light guide plate device of the above-mentioned embodiment is of a one-lamp type, the present invention can be applied to a two-lamp type in which a lamp is arranged on each of the opposite long sides of the light guide plate.
Further, in the above-described embodiment, the diffused reflection portion 18 is provided on all three end surfaces 17 other than the incident surface 12 in the one-lamp type light guide plate device, but the diffused reflection portion 18 is provided only on the facing surface 17 of the incident surface 12, The two end surfaces 17 of No. 1 are smooth surfaces as in the conventional case, and the brightness can be improved even if an edge tape is attached to the smooth surfaces.
【００２２】さらに、上記実施例においては、入射側端
面１２以外の端面１７側端部に乱反射禁止部２０を設け
るとともに、端面１７に乱反射部１８を設けたが、乱反
射禁止部２０を設けるだけでも、発光面における輝度の
均一化という効果は得られる。Further, in the above embodiment, the irregular reflection inhibiting portion 20 is provided at the end portion on the side of the end surface 17 other than the incident side end surface 12, and the irregular reflection portion 18 is provided at the end surface 17, but it is also possible to provide the irregular reflection inhibiting portion 20. The effect of uniforming the brightness on the light emitting surface can be obtained.
【００２３】[0023]
【発明の効果】請求項１に係るエッジライト式導光板装
置おいては、乱反射禁止部により、入射側端面１２以外
の端面１７端部付近で発光が抑制されるので、発光面１
１ａの中央部と端部付近との輝度の差異が小さくなり、
発光面１１ａ全体の輝度を均一化できる。In the edge light type light guide plate device according to the first aspect of the present invention, since the irregular reflection inhibiting portion suppresses light emission near the end portion of the end face 17 other than the incident side end face 12, the light emitting face 1
The difference in brightness between the center and the edge of 1a is reduced,
The brightness of the entire light emitting surface 11a can be made uniform.
【００２４】また、入射側端面１２以外の端面１７に乱
反射部１８が設けられた請求項２に係るエッジライト式
導光板装置おいては、当該端面１７の乱反射部１８での
乱反射により、発光面１１ａに放出される光量が増加
し、輝度の向上を図ることができる。一方、乱反射禁止
部１８は、反射用ペイント１８での乱反射によりペイン
ト塗布面端部付近で異常発光するのを抑制しているの
で、発光面１１ａでの輝度の均一性は損なわれずに済
む。Further, in the edge light type light guide plate device according to claim 2 in which the irregular reflection portion 18 is provided on the end face 17 other than the incident side end face 12, the irregular reflection by the irregular reflection portion 18 of the end face 17 causes the light emitting surface. The amount of light emitted to 11a is increased, and the brightness can be improved. On the other hand, since the irregular reflection inhibiting portion 18 suppresses abnormal light emission near the end portion of the paint application surface due to irregular reflection by the reflection paint 18, the uniformity of luminance on the light emitting surface 11a is not impaired.
【００２５】さらに、乱反射部１８を反射用ペイントの
塗布により形成した請求項３に係る導光板装置おいて
は、エッジテープの貼着作業が不要になるとともに、粘
着剤に関わる不良品の発生を防止できる。従って、作業
性、生産性が向上する。Further, in the light guide plate device according to claim 3 in which the irregular reflection portion 18 is formed by applying a reflection paint, the work of attaching the edge tape is not necessary, and defective products relating to the adhesive are generated. It can be prevented. Therefore, workability and productivity are improved.
【図１】本発明の一実施例の導光板装置を示す断面図で
ある。FIG. 1 is a cross-sectional view showing a light guide plate device according to an embodiment of the present invention.
【図２】本発明の一実施例の導光板装置の乱反射部のド
ットパターンを表した図である。FIG. 2 is a diagram showing a dot pattern of a diffuse reflection portion of a light guide plate device according to an embodiment of the present invention.
【図３】反射面における乱反射部の面積率の変化割合を
示すグラフである。FIG. 3 is a graph showing a change rate of the area ratio of the irregular reflection portion on the reflection surface.
【図４】本実施例品の輝度の測定結果を示す図である。FIG. 4 is a diagram showing the results of measuring the luminance of the product of this example.
【図５】従来例品の輝度の測定結果を示す図である。FIG. 5 is a diagram showing measurement results of luminance of a conventional example product.
【図６】従来の導光板装置を示す平面図である。FIG. 6 is a plan view showing a conventional light guide plate device.
【図７】従来の導光板装置を示す断面図である。FIG. 7 is a cross-sectional view showing a conventional light guide plate device.
【図８】従来の導光板装置の乱反射部のドットパターン
を表した図である。FIG. 8 is a diagram showing a dot pattern of an irregular reflection portion of a conventional light guide plate device.
１１ 導光板 １１ａ 発光面 １１ｂ 反射面 １２ 入射面 １３ 光源用ランプ １８ 乱反射部（反射用ペイント） １９ 乱反射部 ２０ 乱反射禁止部 11 Light guide plate 11a Light emitting surface 11b Reflecting surface 12 Incident surface 13 Light source lamp 18 Diffuse reflection part (reflection paint) 19 Diffuse reflection part 20 Diffuse reflection prohibition part
Claims (3)
射面（１１ｂ）とされた導光板（１１）を備え、前記反
射面（１１ｂ）には乱反射部（１９）が散点状に設けら
れていて、前記乱反射部（１９）が、前記導光板（１
１）の端面（１２）から入射した光を乱反射させて発光
面（１１ａ）側を発光させるようにした導光板装置にお
いて、 前記導光板（１１）の入射側端面（１２）以外の端面
（１７）端部に、乱反射部を有しない乱反射禁止部（２
０）が設けられていることを特徴とするエッジライト式
導光板装置。1. A light guide plate (11) having one surface as a light emitting surface (11a) and the other surface as a reflecting surface (11b), wherein the reflecting surface (11b) is provided with diffused reflection parts (19). Is provided on the light guide plate (1).
In the light guide plate device in which the light incident from the end face (12) of (1) is diffusely reflected so that the light emitting surface (11a) side emits light, the end face (17) other than the incident side end face (12) of the light guide plate (11). ) A diffuse reflection prohibition part (2
0) is provided, an edge light type light guide plate device.
外の端面（１７）に乱反射部（１８）が設けられている
ことを特徴とする請求項１に記載のエッジライト式導光
板装置。2. The edge light type light guide plate according to claim 1, wherein an irregular reflection portion (18) is provided on an end surface (17) other than the incident side end surface (12) of the light guide plate (11). apparatus.
に設けられた前記乱反射部（１８）は、該端面（１７）
に塗布された反射用ペイントであることを特徴とする請
求項２に記載のエッジライト式導光板装置。3. An end face (17) other than the incident side end face (12)
The irregular reflection portion (18) provided on the end face (17)
The edge light type light guide plate device according to claim 2, wherein the edge light type light guide plate device is a reflective paint applied to the.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP08480393A JP3148456B2 (en) | 1993-04-12 | 1993-04-12 | Edge light type light guide plate device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP08480393A JP3148456B2 (en) | 1993-04-12 | 1993-04-12 | Edge light type light guide plate device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06300922A true JPH06300922A (en) | 1994-10-28 |
| JP3148456B2 JP3148456B2 (en) | 2001-03-19 |
Family
ID=13840878
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP08480393A Expired - Lifetime JP3148456B2 (en) | 1993-04-12 | 1993-04-12 | Edge light type light guide plate device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3148456B2 (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001202813A (en) * | 2000-01-21 | 2001-07-27 | Ohtsu Tire & Rubber Co Ltd :The | Light guiding plate for back light and back light |
| US6435686B1 (en) | 1999-02-26 | 2002-08-20 | The Ohtsu Tire & Rubber Co., Ltd. | Light conducting plate for a back lighting device and back lighting device |
| EP1930651A1 (en) | 2006-12-05 | 2008-06-11 | Stanley Electric Co., Ltd. | Light source device and vehicle lighting device |
| JP2012083558A (en) * | 2010-10-12 | 2012-04-26 | Sharp Corp | Display |
| JP2013125685A (en) * | 2011-12-15 | 2013-06-24 | Hayamizu Denki Kogyo Kk | Light guide plate, lighting device, method for manufacturing light guide plate, and method for manufacturing lighting device |
| JP2016009686A (en) * | 2014-06-25 | 2016-01-18 | エルジー ディスプレイ カンパニー リミテッド | Display device |
-
1993
- 1993-04-12 JP JP08480393A patent/JP3148456B2/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6435686B1 (en) | 1999-02-26 | 2002-08-20 | The Ohtsu Tire & Rubber Co., Ltd. | Light conducting plate for a back lighting device and back lighting device |
| JP2001202813A (en) * | 2000-01-21 | 2001-07-27 | Ohtsu Tire & Rubber Co Ltd :The | Light guiding plate for back light and back light |
| EP1930651A1 (en) | 2006-12-05 | 2008-06-11 | Stanley Electric Co., Ltd. | Light source device and vehicle lighting device |
| US7686489B2 (en) | 2006-12-05 | 2010-03-30 | Stanley Electric Co., Ltd. | Light source device and vehicle lighting device |
| JP2012083558A (en) * | 2010-10-12 | 2012-04-26 | Sharp Corp | Display |
| JP2013125685A (en) * | 2011-12-15 | 2013-06-24 | Hayamizu Denki Kogyo Kk | Light guide plate, lighting device, method for manufacturing light guide plate, and method for manufacturing lighting device |
| JP2016009686A (en) * | 2014-06-25 | 2016-01-18 | エルジー ディスプレイ カンパニー リミテッド | Display device |
| US10018861B2 (en) | 2014-06-25 | 2018-07-10 | Lg Display Co., Ltd. | Display device |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3148456B2 (en) | 2001-03-19 |
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