JPH04265909A - Planar illuminator - Google Patents
Planar illuminatorInfo
- Publication number
- JPH04265909A JPH04265909A JP3049100A JP4910091A JPH04265909A JP H04265909 A JPH04265909 A JP H04265909A JP 3049100 A JP3049100 A JP 3049100A JP 4910091 A JP4910091 A JP 4910091A JP H04265909 A JPH04265909 A JP H04265909A
- Authority
- JP
- Japan
- Prior art keywords
- light
- guide plate
- light guide
- light source
- 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.)
- Pending
Links
- 239000011248 coating agent Substances 0.000 claims abstract description 14
- 238000000576 coating method Methods 0.000 claims abstract description 14
- 238000009792 diffusion process Methods 0.000 claims description 23
- 238000005286 illumination Methods 0.000 claims description 21
- 239000003973 paint Substances 0.000 claims description 16
- 239000000049 pigment Substances 0.000 abstract description 2
- 230000003247 decreasing effect Effects 0.000 abstract 1
- 238000007788 roughening Methods 0.000 abstract 1
- 239000000758 substrate Substances 0.000 abstract 1
- 239000012463 white pigment Substances 0.000 abstract 1
- 238000004519 manufacturing process Methods 0.000 description 9
- 230000007423 decrease Effects 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229920001225 polyester resin Polymers 0.000 description 2
- 239000004645 polyester resin Substances 0.000 description 2
- 239000004925 Acrylic resin Substances 0.000 description 1
- 229920000178 Acrylic resin Polymers 0.000 description 1
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- -1 polyethylene terephthalate Polymers 0.000 description 1
- 229920000139 polyethylene terephthalate Polymers 0.000 description 1
- 239000005020 polyethylene terephthalate Substances 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 235000010215 titanium dioxide Nutrition 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
Landscapes
- Light Guides In General And Applications Therefor (AREA)
- Liquid Crystal (AREA)
- Planar Illumination Modules (AREA)
- Illuminated Signs And Luminous Advertising (AREA)
Abstract
Description
【０００１】0001
【産業上の利用分野】本発明は、各種の表示装置のバッ
クライト光源として用いられる、表面の明るさの均一化
を計ると共に、同一光度の光源でも明るさを強化するこ
とのできる面照明装置に関するものである。[Industrial Application Field] The present invention is a surface illumination device that is used as a backlight source for various display devices and is capable of equalizing the brightness of the surface and enhancing the brightness even with a light source of the same luminous intensity. It is related to.
【０００２】0002
【従来の技術】従来、この種の面照明装置に対しては種
々提案されているが、その代表的なものとして特開平１
−２４１５９０号公報がある。この提案は「側面から入
射された光を伝播する透明な導光板と、該導光板の両面
にそれぞれ当接する拡散板および反射板と、該導光板の
側面に沿って配設された直管状光源とを有し、白色塗料
を塗布してなる光拡散層を、単位面積当たりの塗料塗布
面積が該光源から離れるに従って大きくなるように、該
反射板が当接する該導光板の光拡散面に形成してなるこ
とを特徴とする面照明装置」である。[Prior Art] Various proposals have been made for this type of surface illumination device, but a representative one is
There is a publication No.-241590. This proposal consists of ``a transparent light guide plate that propagates light incident from the side, a diffuser plate and a reflector plate that come into contact with both sides of the light guide plate, and a straight tube light source arranged along the sides of the light guide plate. and forming a light diffusing layer formed by applying a white paint on the light diffusing surface of the light guide plate that is in contact with the reflecting plate so that the paint coating area per unit area increases as the distance from the light source increases. A surface illumination device characterized by:
【０００３】0003
【発明が解決しようとする課題】上記の提案された面照
明装置は、光源から導光板に入射した光のうち、反射板
および拡散板に対して平行または略平行な導光板内部の
光が直進して各側端面から外部へ投射されるため、どう
しても導光板の各側端面付近の明るさが低下して表面全
体の明るさを均一化することが困難になる欠点があり、
そのうえ導光板に入射した光の利用効率が低いものにな
るので、表面全体を所要の明るさに保持しようとすると
、光源の容量を大きなものにしなければならない欠点も
ある。又導光板および反射板の光に対する反射機能が充
分でないため、表面にどうしても明るさのムラが生ずる
欠点のあるものである。さらに導光板の反射板に相対す
る面に形成された光拡散層は、その構成が複雑なので製
作が困難となり、どうしても導光板の原価高を招来する
欠点もある。[Problems to be Solved by the Invention] The above-mentioned proposed surface illumination device is designed so that among the light incident on the light guide plate from the light source, the light inside the light guide plate that is parallel or approximately parallel to the reflection plate and the diffuser plate travels straight. Since the light is projected from each side end face to the outside, the brightness in the vicinity of each side end face of the light guide plate inevitably decreases, making it difficult to equalize the brightness over the entire surface.
Furthermore, since the utilization efficiency of the light incident on the light guide plate is low, there is also the drawback that the capacity of the light source must be increased in order to maintain the required brightness over the entire surface. Furthermore, since the light guiding plate and the reflecting plate do not have a sufficient light reflecting function, there is a drawback that uneven brightness inevitably occurs on the surface. Furthermore, the light diffusing layer formed on the surface of the light guide plate facing the reflection plate has a complicated structure, making it difficult to manufacture, which inevitably increases the cost of the light guide plate.
【０００４】0004
【課題を解決するための手段】本発明は、従来のこのよ
うな問題点に着目してなされたものであって、導光板に
光源のない他の各側端面へ端面反射層を形成すると共に
、一面側へ白色塗料からなる同一の幅または径で連続ま
たは断続した直線状反射線により光拡散層を形成し、さ
らに反射層を形成された反射板を光拡散層を介して導光
板に対向設置した面照明装置を提供することにより、上
記問題点を解決することを目的としている。[Means for Solving the Problems] The present invention has been made in view of the above-mentioned conventional problems, and includes forming an end face reflective layer on each other end face of the light guide plate where there is no light source. A light diffusion layer is formed on one side by continuous or discontinuous linear reflection lines of the same width or diameter made of white paint, and a reflection plate with a reflection layer formed thereon faces the light guide plate through the light diffusion layer. The present invention aims to solve the above problems by providing an installed surface illumination device.
【０００５】本発明は、一側端面に沿って配設された直
管状光源から入射された光を伝播する、端面反射層を形
成された透明な導光板に、該導光板の一面側に反射層を
形成された反射板を、また反対面側に拡散板を夫々対向
設置すると共に、該一面側に白色塗料を塗布して、同一
の幅または径で連続または断続した複数の直線状反射線
を、中心に位置した該反射線の両側へ同一所定間隔で配
置し且つ該光源から離れるに従って該所定間隔が次第に
狭くなるようにした光拡散層を形成したことを特徴とす
る面照明装置である。[0005] The present invention provides a transparent light guide plate on which an end face reflection layer is formed, which propagates light incident from a straight tube light source disposed along one end face of the light guide plate. A plurality of continuous or intermittent linear reflection lines with the same width or diameter are formed by installing layered reflective plates and a diffuser plate on the opposite side, and applying white paint to one side. A light diffusing layer is formed on both sides of the reflection line located at the center at the same predetermined interval, and the predetermined interval becomes gradually narrower as the distance from the light source increases. .
【０００６】[0006]
【作用】本発明に係る面照明装置は、導光板の光源のな
い他の各側端面に端面反射層を形成しているので、反射
板および拡散板に対して平行または略平行で光源から入
射して導光板内部を直進した光が各側端面に到達したと
き、外部へ投射されることなく確実に内部へ乱反射され
るため、導光板の各側端面付近の明るさが低下すること
なく表面全体を均一な明るさに保持することができ、そ
のうえ光源から導光板に入射した光を端面反射層と反射
板の反射層とで外部に投射させることなく全部を照明に
利用できるようにしているため、入射した光の利用効率
が高く、所要の明るさを保持するための光源の容量を小
さくすることができる。[Operation] In the surface illumination device according to the present invention, an end face reflection layer is formed on each end face of the light guide plate other than the light source, so that the light is incident from the light source parallel or substantially parallel to the reflection plate and the diffuser plate. When the light that travels straight inside the light guide plate reaches each side end face, it is reliably diffusely reflected inside without being projected to the outside, so that the brightness near each side end face of the light guide plate does not decrease and the light reaches the surface. The entire area can be maintained at uniform brightness, and in addition, all of the light that enters the light guide plate from the light source can be used for illumination without being projected to the outside by the end face reflective layer and the reflective layer of the reflector plate. Therefore, the utilization efficiency of incident light is high, and the capacity of the light source for maintaining the required brightness can be reduced.
【０００７】又面照明装置は、反射層を形成した反射板
を導光板の光拡散層に対向設置しているので、光拡散層
のある面から投射された光を確実に導光板側へ乱反射さ
せると共に、導光板の内部を直進または屈折して外部へ
投射される光を端面反射層で確実に内部に乱反射させる
ため、導光板の表面における明るさのムラの発生を防止
することができる。さらに導光板に形成された光拡散層
は、直線状反射線で形成されているので、従来の光拡散
層の製作に比較して極めて容易に且つ確実に製作できる
ため、導光板の製作不良率も低下して原価低減を計るこ
とができる。[0007] Also, in the surface illumination device, since the reflection plate with the reflection layer formed thereon is installed opposite to the light diffusion layer of the light guide plate, the light projected from the surface with the light diffusion layer is reliably diffusely reflected toward the light guide plate. At the same time, since the light that travels straight through or is refracted inside the light guide plate and is projected to the outside is reliably diffusely reflected inside by the end face reflection layer, it is possible to prevent uneven brightness on the surface of the light guide plate. Furthermore, since the light diffusion layer formed on the light guide plate is formed of linear reflection lines, it can be manufactured extremely easily and reliably compared to the production of conventional light diffusion layers, which reduces the manufacturing defect rate of the light guide plate. It is also possible to reduce costs by lowering the cost.
【０００８】[0008]
【実施例】本発明を図１〜図４に示す一実施例に基づい
て以下詳述する。１は一側端面２１ に沿って直管状光
源３を配設された、一側端面２１ から入射された光を
伝播する透明なアクリル樹脂などで造られた厚さ２〜７
ｍｍの方形板状の導光板で、光源のない他の各側端面２
２ ，２３，２４ に、粗面４を形成して、その上に白
色度の高い顔料（チタンホワイト，酸化亜鉛など）を含
む白色塗料を塗布して生成された白色塗膜５で粗面４を
被覆して形成された端面反射層６と、光源３に近い箇所
で光の反射量を少なく、光源３から離れるに従って光の
反射量を多くするため、導光板１の一面（図３の下面）
に図４に示す如く白色塗料を塗布して、同一の幅で連続
した複数の直線状反射線７を、中心に位置した反射線７
′の両側へ同一所定間隔で配置し且つ光源３から離れる
に従って該所定間隔を次第に狭くなるように形成された
光拡散層８とを備えている。DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below based on an embodiment shown in FIGS. 1 to 4. 1 is made of transparent acrylic resin or the like and has a thickness of 2 to 7 and has a straight tube-shaped light source 3 disposed along one end surface 21 and propagates light incident from the one end surface 21.
mm rectangular plate-shaped light guide plate, each other side end surface 2 where there is no light source
2 , 23 , 24 , a rough surface 4 is formed, and a white coating film 5 generated by applying a white paint containing a pigment with high whiteness (titanium white, zinc oxide, etc.) thereon is applied to the rough surface 4 . In order to reduce the amount of light reflected near the light source 3 and increase the amount of light reflected as the distance from the light source 3 increases, the edge reflective layer 6 is formed by covering one surface of the light guide plate 1 (the bottom surface in FIG. 3). )
As shown in FIG.
' and are arranged at the same predetermined interval on both sides of the light source 3, and are formed so that the predetermined interval becomes gradually narrower as the distance from the light source 3 increases.
【０００９】又９は一面に粗面１０を形成し、他面に白
色塗料を塗布して生成された白色塗膜１１で被覆され、
導光板１の光拡散層８に粗面１０を相対して設置された
、光を吸収しないポリエステル樹脂などからなる方形板
状或はフィルム状の反射板、１２は必要に応じて一面に
粗面１３を形成し、粗面１３を導光板１の光拡散層８の
ない面（図３の上面）に相対して設置された、ポリエチ
レンテレフタレート樹脂などからなる方形板状或はフィ
ルム状の拡散板、１４は一側端面２１ に直管状光源３
を配設した導光板１と、導光板１の光拡散層８のある面
に粗面１０を相対して設置された反射板９と、導光板１
の光拡散層８のない面に粗面１３を相対して設置された
拡散板１２とで構成された面照明装置である。Further, 9 has a rough surface 10 formed on one side and is coated with a white coating film 11 formed by applying white paint on the other side,
A rectangular plate-shaped or film-shaped reflecting plate made of polyester resin that does not absorb light, with a rough surface 10 facing the light diffusion layer 8 of the light guide plate 1, 12 has a rough surface on one side as necessary. A rectangular plate-like or film-like diffuser plate made of polyethylene terephthalate resin or the like, with the rough surface 13 facing the surface of the light guide plate 1 without the light diffusion layer 8 (the upper surface of FIG. 3). , 14 has a straight tube light source 3 on one end surface 21.
a light guide plate 1 with a light guide plate 1 arranged thereon, a reflector plate 9 installed with a rough surface 10 facing the surface of the light guide plate 1 where the light diffusion layer 8 is located, and a light guide plate 1
This is a surface illumination device comprising a diffusion plate 12 installed with a rough surface 13 facing the surface without the light diffusion layer 8.
【００１０】光源３からでて導光板１に入射した光は、
導光板１内部を進行すると共に、光拡散層８の各反射線
７…間の空間を進行するが、導光板１内部を進行した光
の大部分は内部で屈折反射を繰返しながら導光板１の両
面に投射され、さらに光の残りの部分は内部を直進して
端面反射層６で内部に乱反射されて大部分の光と共に両
面に投射されることになる。この光拡散層８側へ投射さ
れた光と一緒になった各反射線７…間の空間を進行する
光は、各反射線７…に衝突して反射し、大部分のものは
導光板１を透過して拡散板１２側に投射され、他の部分
は反射板９の粗面１０および白色塗膜１１との間で屈折
反射されて結局入射した全光が導光板１の拡散板１２側
に投射されて、導光板１の全面を均一に照明し、続けて
拡散板１２を光が透過して全面をさらに均一に照明する
ものである。この面照明装置１４は、拡散板１２側に表
示しようとするものを配設して、バックライト光源とし
て用いられる。The light emitted from the light source 3 and incident on the light guide plate 1 is
While traveling inside the light guide plate 1, it also travels through the spaces between the reflection lines 7 of the light diffusing layer 8, but most of the light that has traveled inside the light guide plate 1 is repeatedly refracted and reflected inside the light guide plate 1. The remaining part of the light travels straight through the interior, is diffusely reflected internally by the end face reflection layer 6, and is projected onto both sides together with most of the light. The light that travels through the spaces between the reflection lines 7 along with the light projected onto the light diffusion layer 8 side collides with each reflection line 7 and is reflected, and most of the light travels through the spaces between the reflection lines 7. The remaining light is refracted and reflected between the rough surface 10 of the reflection plate 9 and the white coating 11, and all the incident light is projected onto the diffusion plate 12 side of the light guide plate 1. The light is projected to uniformly illuminate the entire surface of the light guide plate 1, and then passes through the diffuser plate 12 to further uniformly illuminate the entire surface. This surface illumination device 14 is used as a backlight source by arranging what is to be displayed on the diffuser plate 12 side.
【００１１】この場合、面照明装置１４は、導光板１の
光源３のない他の各側端面２２ ，２３ ，２４ に、
粗面４と白色塗膜５とからなる端面反射層６を形成して
いるので、反射板９および拡散板１２に対して平行また
は略平行で、光源３から入射して導光板１内部を直進す
る光が各側端面２２ ，２３ ，２４ に到達したとき
、外部に投射されることなく確実に内側へ乱反射するた
め、導光板１の各側端面２２ ，２３ ，２４ 付近の
明るさが低下することなく表面全体を均一な明るさに保
持することができ、そのうえ光源３から導光板１に入射
した光を端面反射層６と反射板９の反射層（粗面１０お
よび白色塗膜１１）とで外部に投射させることなく全部
を照明に利用できるようにしているため、入射した光の
利用効率が高く、所要の明るさを保持するための光源の
容量を小さくすることができる。[0011] In this case, the surface illumination device 14 includes lights on each of the other side end faces 22 , 23 , 24 of the light guide plate 1 where the light source 3 is not located.
Since the edge reflection layer 6 is formed of a rough surface 4 and a white coating 5, the light enters from the light source 3 and travels straight inside the light guide plate 1 in parallel or approximately parallel to the reflection plate 9 and the diffusion plate 12. When the light reaches each side end surface 22 , 23 , 24 , it is definitely diffusely reflected inward without being projected to the outside, so the brightness near each side end surface 22 , 23 , 24 of the light guide plate 1 decreases. In addition, the entire surface can be maintained at a uniform brightness without causing any damage, and in addition, the light incident on the light guide plate 1 from the light source 3 is reflected by the end surface reflection layer 6 and the reflection layer (rough surface 10 and white coating film 11) of the reflection plate 9. Since all of the light can be used for illumination without projecting it to the outside, the efficiency of using the incident light is high, and the capacity of the light source to maintain the required brightness can be reduced.
【００１２】又面照明装置１４は、反射層（粗面１０お
よび白色塗膜１１）を形成した反射板９を導光板１の光
拡散層８に対向設置しているので、光拡散層８のある面
から投射された光を確実に導光板１側へ乱反射させると
共に、導光板１の内部を直進または屈折して外部へ投射
される光を端面反射層６で確実に内部に乱反射させるた
め、導光板１表面における明るさのムラの発生を防止す
ることができる。さらに導光板１に形成された光拡散層
８は、直線状反射線７で形成されているので、従来の光
拡散層の製作に比較して極めて容易に且つ確実に製作す
ることができるため、導光板の製作不良率も低めて原価
低減を計ることができる。Further, in the surface illumination device 14, the reflection plate 9 on which the reflection layer (rough surface 10 and white coating film 11) is formed is placed opposite to the light diffusion layer 8 of the light guide plate 1. In order to ensure that light projected from a certain surface is diffusely reflected toward the light guide plate 1 side, and that light that travels straight through or is refracted inside the light guide plate 1 and is projected to the outside is diffusely reflected internally by the end surface reflective layer 6, It is possible to prevent uneven brightness from occurring on the surface of the light guide plate 1. Furthermore, since the light diffusion layer 8 formed on the light guide plate 1 is formed of linear reflection lines 7, it can be manufactured extremely easily and reliably compared to the production of conventional light diffusion layers. It is also possible to reduce manufacturing costs by lowering the manufacturing defect rate of the light guide plate.
【００１３】上記の一実施例において、導光板１の光拡
散層８は、白色塗料からなる複数の直線状反射線７で形
成したが、この代りに図５に示す如く、同一の幅で断続
した点線からなる複数の直線状反射線１５（Ａ）または
同一の径の円で断続した複数の直線状反射線１５′（Ｂ
）の何れかで形成しても良い。又反射板９は、光拡散層
８に相対する面に粗面１０を形成し、裏面に白色塗料か
らなる白色塗膜１１で被覆したが、この白色塗膜１１の
代りに鏡面化しても良く、さらに一面を鏡面化したポリ
エステル樹脂などからなるフィルムを、白色塗膜１１に
鏡面化した面が接するように反射板９に並設しても良い
。In the embodiment described above, the light diffusing layer 8 of the light guide plate 1 was formed of a plurality of linear reflection lines 7 made of white paint, but instead of this, as shown in FIG. A plurality of linear reflection lines 15 (A) consisting of dotted lines or a plurality of linear reflection lines 15' (B) interrupted by circles of the same diameter.
) may be formed. Further, the reflection plate 9 has a rough surface 10 formed on the surface facing the light diffusion layer 8, and the back surface is coated with a white coating film 11 made of white paint, but the white coating film 11 may be replaced with a mirror surface. Further, a film made of polyester resin or the like with one side mirror-finished may be arranged in parallel with the reflecting plate 9 so that the mirror-finished surface is in contact with the white coating film 11.
【００１４】[0014]
【発明の効果】本発明は上記の構成を有するので次の効
果を奏する。即ち、明るさに対するムラが非常に少なく
全面を均一に照明するため、各種の表示装置に対するバ
ックライト光源として極めて優れている。又全面をムラ
なく均一に照明するので照明面積の大きな装置を製作可
能である。又同一明るさを得るための光源容量を小さく
できるので、電源部の小形化ができる。又導光板１の光
拡散層８の製作が容易なので、導光板の製作不良率を低
めて原価低減を計り、安価な導光板を提供することがで
きる。[Effects of the Invention] Since the present invention has the above-mentioned configuration, it has the following effects. That is, since there is very little unevenness in brightness and the entire surface is uniformly illuminated, it is extremely excellent as a backlight light source for various display devices. Furthermore, since the entire surface is illuminated evenly and uniformly, it is possible to manufacture a device with a large illumination area. Furthermore, since the light source capacity can be reduced to obtain the same brightness, the power supply section can be downsized. Furthermore, since the light diffusing layer 8 of the light guide plate 1 is easy to manufacture, the manufacturing defect rate of the light guide plate can be reduced, the cost can be reduced, and an inexpensive light guide plate can be provided.
【図１】本発明に係る面照明装置の一実施例を示す平面
図。FIG. 1 is a plan view showing an embodiment of a surface lighting device according to the present invention.
【図２】図１の拡散板を取除いた平面図。FIG. 2 is a plan view with the diffuser plate of FIG. 1 removed.
【図３】図１のＡ−Ａ断面図。FIG. 3 is a sectional view taken along line AA in FIG. 1;
【図４】導光板の光拡散層の構成を示す平面図。FIG. 4 is a plan view showing the configuration of a light diffusion layer of a light guide plate.
【図５】導光板の光拡散層を示す他の例の平面図。FIG. 5 is a plan view of another example showing a light diffusion layer of a light guide plate.
１ 導光板 ２１ ，２２ ，２３ ，２４ 側端面３ 光源 ４，１０，１３ 粗面 ５，１１ 白色塗膜 ６ 端面反射層 ７，１５，１５′ 直線状反射線 ８ 光拡散層 ９ 反射板 １２ 拡散板 １４ 面照明装置 1 Light guide plate 21, 22, 23, 24 Side end surface 3 Light source 4,10,13 Rough surface 5,11 White paint film 6 Edge reflective layer 7, 15, 15' Straight reflection line 8 Light diffusion layer 9 Reflector plate 12 Diffusion plate 14 Surface lighting device
Claims (8)
源から入射された光を伝播する、端面反射層を形成され
た透明な導光板に、該導光板の一面側に反射層を形成さ
れた反射板を、また反対面側に拡散板を夫々対向設置す
ると共に、該一面側に白色塗料を塗布して、同一の幅ま
たは径で連続または断続した複数の直線状反射線を、中
心に位置した該反射線の両側へ同一所定間隔で配置し且
つ該光源から離れるに従って該所定間隔が次第に狭くな
るようにした光拡散層を形成したことを特徴とする面照
明装置。Claim 1: A transparent light guide plate on which an edge reflection layer is formed, which propagates light incident from a straight tube light source disposed along one side end face, and a reflection layer is provided on one side of the light guide plate. The formed reflecting plate and the diffuser plate are placed oppositely on the opposite side, and a white paint is applied to the one side to form a plurality of continuous or intermittent linear reflection lines with the same width or diameter. A surface illumination device characterized in that light diffusing layers are formed on both sides of the reflection line located at the center at the same predetermined interval, and the predetermined interval becomes gradually narrower as the distance from the light source increases.
たのち白色塗料からなる白色塗膜で被覆して、端面反射
層を形成した導光板を備えたことを特徴とする特許請求
の範囲第１項記載の面照明装置。[Claim 2] A patent claim comprising a light guide plate in which each of the other side end faces where there is no light source is roughened and then coated with a white paint film made of white paint to form an end face reflective layer. The area illumination device according to item 1.
えたことを特徴とする特許請求の範囲第１項または第２
項記載の面照明装置。[Claim 3] Claim 1 or 2 is characterized by comprising a diffuser plate whose surface on the light guide plate side is roughened.
The surface illumination device described in Section 1.
に、裏面を白色塗料からなる白色塗膜で被覆した、反射
層を形成された反射板を備えたことを特徴とする特許請
求の範囲第１項乃至第３項の何れかに記載の面照明装置
。[Claim 4] A reflecting plate having a reflective layer formed thereon, the surface facing the light guide plate being roughened and the back surface being coated with a white coating made of white paint. A surface lighting device according to any one of the first to third items.
に、裏面を鏡面化した、反射層を形成された反射板を備
えたことを特徴とする特許請求の範囲第１項乃至第３項
の何れかに記載の面照明装置。5. Claims 1 to 3, characterized by comprising a reflecting plate on which a reflective layer is formed, the surface facing the light guide plate is roughened, and the back surface is mirror-finished. The surface illumination device according to any one of paragraphs.
した直線状反射線を用いて光拡散層を形成した導光板を
備えたことを特徴とする特許請求の範囲第１項乃至第５
項の何れかに記載の面照明装置。6. A light guide plate coated with white paint to form a light diffusion layer using continuous linear reflection lines having the same width. 5
The surface illumination device according to any one of paragraphs.
続の直線状反射線を用いて光拡散層を形成した導光板を
備えたことを特徴とする特許請求の範囲第１項乃至第５
項の何れかに記載の面照明装置。7. A light guide plate coated with white paint to form a light diffusing layer using discontinuous linear reflection lines having the same width. Fifth
The surface illumination device according to any one of paragraphs.
続の直線状反射線を用いて光拡散層を形成した導光板を
備えたことを特徴とする特許請求の範囲第１項乃至第５
項の何れかに記載の面照明装置。8. A light guide plate coated with white paint to form a light diffusing layer using discontinuous linear reflection lines having the same diameter. Fifth
The surface illumination device according to any one of paragraphs.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3049100A JPH04265909A (en) | 1991-02-20 | 1991-02-20 | Planar illuminator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3049100A JPH04265909A (en) | 1991-02-20 | 1991-02-20 | Planar illuminator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04265909A true JPH04265909A (en) | 1992-09-22 |
Family
ID=12821680
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3049100A Pending JPH04265909A (en) | 1991-02-20 | 1991-02-20 | Planar illuminator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04265909A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0961633A (en) * | 1995-08-24 | 1997-03-07 | Matsushita Electric Ind Co Ltd | Linear lighting device |
| TWI584006B (en) * | 2014-04-23 | 2017-05-21 | 群創光電股份有限公司 | Display device and processing apparatus of the same |
-
1991
- 1991-02-20 JP JP3049100A patent/JPH04265909A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0961633A (en) * | 1995-08-24 | 1997-03-07 | Matsushita Electric Ind Co Ltd | Linear lighting device |
| TWI584006B (en) * | 2014-04-23 | 2017-05-21 | 群創光電股份有限公司 | Display device and processing apparatus of the same |
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