JP2001043719A - Surface light source unit - Google Patents
Surface light source unitInfo
- Publication number
- JP2001043719A JP2001043719A JP11214357A JP21435799A JP2001043719A JP 2001043719 A JP2001043719 A JP 2001043719A JP 11214357 A JP11214357 A JP 11214357A JP 21435799 A JP21435799 A JP 21435799A JP 2001043719 A JP2001043719 A JP 2001043719A
- Authority
- JP
- Japan
- Prior art keywords
- light
- light source
- guide plate
- source unit
- led
- 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
Landscapes
- Planar Illumination Modules (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、面状光源ユニット
及びこの面状光源ユニットを液晶表示パネルを背面から
照射するバックライト機構に用いた液晶表示装置に関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a planar light source unit and a liquid crystal display device using the planar light source unit in a backlight mechanism for illuminating a liquid crystal display panel from the back.
【０００２】[0002]
【従来の技術】近年各種パソコン、ワープロ、ゲーム機
器、携帯電話などの各種電子機器の表示装置として、薄
型で見易いバックライト機構を備えた液晶表示装置が広
く用いられている。従来のこのような液晶表示装置のバ
ックライト機構の面状光源ユニットの一例を図面に基づ
いて説明する。図６、図７はそれぞれ従来の面状光源ユ
ニットの斜視図、断面図である。2. Description of the Related Art In recent years, a liquid crystal display device having a thin and easy-to-see backlight mechanism has been widely used as a display device of various electronic devices such as various personal computers, word processors, game machines and mobile phones. An example of a conventional planar light source unit of a backlight mechanism of such a liquid crystal display device will be described with reference to the drawings. 6 and 7 are a perspective view and a sectional view of a conventional planar light source unit, respectively.
【０００３】まず、面状光源ユニットの構成について説
明する。図６、図７において、９０は面状光源ユニット
の上面に近接して配設された液晶表示パネルであり、６
０はエッジライト方式の面状光源ユニットである。以下
に面状光源ユニット６０の細部を説明する。６１は透明
なプラスチックス等の透光性部材から形成された平面が
略四辺形の平板状の導光板であり、導光板の上面６１ｂ
は出光面であり、下面６１ａには多数の微細な凹凸面か
らなる乱反射部６１ｅが形成されている。８０は導光板
６１の下面６１ａに近接して配設された白色シート等の
反射板である。７０は光源としてのＬＥＤであり、複数
（例えば３個）のＬＥＤ７０が導光板６１の側面６１ｃ
に近接して離散的に配置されている。各ＬＥＤ７０と対
向する導光板６１の側面６１ｃには各々の光源の出光点
を中心とした断面半円状の溝６１ｄである入光面が厚み
方向に平行に形成されている。導光板６１の溝６１ｄ形
成部を除いた部分が液晶表示パネル９０と垂直方向にほ
ぼ重なっている。[0003] First, the configuration of the planar light source unit will be described. 6 and 7, reference numeral 90 denotes a liquid crystal display panel disposed close to the upper surface of the planar light source unit.
Reference numeral 0 denotes an edge light type planar light source unit. The details of the planar light source unit 60 will be described below. Reference numeral 61 denotes a flat light guide plate having a substantially quadrangular flat surface formed of a light-transmissive member such as transparent plastics, and an upper surface 61b of the light guide plate.
Denotes a light emitting surface, and on the lower surface 61a, irregularly-reflected portions 61e formed of a large number of fine uneven surfaces are formed. Reference numeral 80 denotes a reflection plate such as a white sheet disposed close to the lower surface 61a of the light guide plate 61. Reference numeral 70 denotes an LED as a light source, and a plurality of (for example, three) LEDs 70 are provided on the side surface 61 c of the light guide plate 61.
Are arranged discretely in the vicinity of. On a side surface 61c of the light guide plate 61 facing each LED 70, a light incident surface which is a groove 61d having a semicircular cross section centering on a light emitting point of each light source is formed in parallel with the thickness direction. The portion of the light guide plate 61 excluding the portion where the groove 61d is formed substantially overlaps the liquid crystal display panel 90 in the vertical direction.
【０００４】次に面状光源ユニットの作用について説明
する。各ＬＥＤ７０を出射した光は導光板６１の溝６１
ｄ部から入射し、導光板６１内部を進行するが、直接上
面６１ｂに向かう光線は上面６１ｂにおいて全反射して
下面６１ａ方向に向かう。ＬＥＤ７０から直接きた光線
と上面６１ｂに反射してきた光線とが下面６１ａに当た
った場合に、乱反射部６１ｅのために導光板６１内のあ
らゆる方向に反射する。乱反射部６１ｅにおいて反射し
た光はその方向により導光板６１の周面の内側で反射し
たり、透過したりすることになる。下面６１ａを外側に
出た光はすぐに反射シート８０により反射するので再び
導光板６１内に戻る。このようにして光はおおむね導光
板６１の出光面から出て液晶表示パネル９０を背面から
照射し、表示面が明るく見易くなる。Next, the operation of the planar light source unit will be described. The light emitted from each LED 70 is transmitted to the groove 61 of the light guide plate 61.
Light entering from the portion d and traveling inside the light guide plate 61 is directly reflected on the upper surface 61b and totally reflected on the upper surface 61b and directed toward the lower surface 61a. When the light beam directly coming from the LED 70 and the light beam reflected on the upper surface 61b hit the lower surface 61a, the light is reflected in all directions in the light guide plate 61 due to the irregular reflection portion 61e. The light reflected by the irregular reflection portion 61e is reflected or transmitted inside the peripheral surface of the light guide plate 61 depending on the direction. Light that has exited the lower surface 61a to the outside is immediately reflected by the reflection sheet 80, and thus returns to the light guide plate 61 again. In this manner, the light generally exits from the light exit surface of the light guide plate 61 and irradiates the liquid crystal display panel 90 from the back, so that the display surface is bright and easy to see.
【０００５】[0005]
【発明が解決しようとする課題】しかしながら、前述し
た面状光源ユニットでは、ＬＥＤが離散的に配置されて
いる上に、ＬＥＤの光には光源から一定の距離では放射
方向の中心付近が明るく、その周辺へ向かうに従って暗
くなる指向性があり、また、光は一般的に光源の近傍で
は強いが遠方では弱くなる傾向があるために、ＬＥＤの
数を減らしかつ表示面を均一に照射することには限界が
あり満足する品質に至らなかった。ＬＥＤの発光方向に
対して直角方向の辺の長さが比較的長い出光面を持つ面
状光源ユニットを得るためには、ＬＥＤをその辺に沿っ
て多数配設する必要があり、その分製造コストが高くな
り、消費電力的も増大することになる。However, in the planar light source unit described above, the LEDs are discretely arranged, and the LED light is bright near the center in the radiation direction at a certain distance from the light source. There is a directivity that becomes darker toward the periphery, and light generally tends to be strong near the light source but weak at a long distance.Therefore, it is necessary to reduce the number of LEDs and uniformly illuminate the display surface. Did not reach satisfactory quality due to limitations. In order to obtain a planar light source unit having a light emitting surface having a relatively long side in the direction perpendicular to the light emitting direction of the LED, it is necessary to dispose a large number of LEDs along the side, and to manufacture the LED accordingly. The cost will increase and the power consumption will also increase.
【０００６】上記発明はこのような従来の問題を解決す
るためになされたものであり、その目的は、ＬＥＤ光源
からの光を効率よく出光面に導いて均一に出射させるこ
とができ、コスト的にも消費電力上も有利な、比較的広
い出光面を持つ面状光源ユニットを提供することであ
る。The present invention has been made to solve such a conventional problem. An object of the present invention is to efficiently guide light from an LED light source to a light emitting surface and uniformly emit the light, thereby reducing cost. Another object of the present invention is to provide a planar light source unit having a relatively wide light emitting surface, which is advantageous in power consumption.
【０００７】[0007]
【課題を解決するための手段】前記課題を解決するため
に、本発明の請求項１の発明は、透光性部材からなる板
状部材であり下面に乱反射部を形成して上面を出光面と
した導光板と、該導光板の側面に近接配置した光源のＬ
ＥＤとからなり、該ＬＥＤから前記導光板の側面に入射
した光を前記出光面から出射させるようにしたエッジラ
イト方式の面状光源ユニットにおいて、前記導光板の前
記ＬＥＤ側の一側面が前記出光面から前記ＬＥＤ側に延
在する複数の光源部を設け、各々の該光源部に対応して
前記ＬＥＤを配設し、前記光源部内に前記導光板の厚み
方向断面が垂直であり平面方向断面が前記ＬＥＤの出光
点に対して傾斜した反射屈折面を持つ貫通穴又は貫通し
ない穴からなる反射屈折部を前記ＬＥＤと対向するよう
に設け、前記光源部の前記ＬＥＤ側の両側面に乱反射部
を設けたことを特徴とする。According to a first aspect of the present invention, there is provided a plate-like member made of a translucent member, wherein a diffusely reflecting portion is formed on a lower surface and an upper surface is formed as a light emitting surface. And a light source L disposed close to the side surface of the light guide plate.
In an edge light type planar light source unit comprising an ED and emitting light incident on a side surface of the light guide plate from the LED from the light emitting surface, one side surface of the light guide plate on the LED side is the light emission. A plurality of light source sections extending from the surface to the LED side, the LEDs are arranged corresponding to the respective light source sections, and a cross section in the thickness direction of the light guide plate is vertical and a cross section in the plane direction in the light source section. Is provided so as to face the LED, and includes a through-hole having a catadioptric surface inclined with respect to the light emitting point of the LED or a hole that does not penetrate therethrough. Is provided.
【０００８】本発明の請求項２の発明は、請求項１記載
の発明において、前記導光板の少なくとも入光面及び前
記出光面を除いた周面に乱反射部を形成したことを特徴
とする。According to a second aspect of the present invention, in the first aspect of the present invention, an irregular reflection portion is formed on at least a peripheral surface of the light guide plate excluding the light incident surface and the light exit surface.
【０００９】本発明の請求項３の発明は、請求項１又は
請求項２記載の発明において、前記光源部の両側面の乱
反射部は前記導光板の厚み方向に略平行な断面略円弧形
状の溝であることを特徴とする。According to a third aspect of the present invention, in the first or the second aspect of the present invention, the irregular reflection portions on both side surfaces of the light source section have a substantially arc-shaped cross section substantially parallel to the thickness direction of the light guide plate. It is a groove.
【００１０】本発明の請求項４の発明は、請求項１又は
請求項２記載の発明において、前記乱反射部は半球状の
窪みであることを特徴とする。According to a fourth aspect of the present invention, in the first or the second aspect, the irregular reflection portion is a hemispherical recess.
【００１１】本発明の請求項５の発明は、請求項１又は
請求項２記載の発明において、前記乱反射部は微細な凹
凸面であることを特徴とする。According to a fifth aspect of the present invention, in the first or second aspect, the irregular reflection portion is a fine uneven surface.
【００１２】本発明の請求項６の発明は、請求項１又は
請求項２記載の発明において、前記乱反射部は白色塗装
または印刷を施した面であることを特徴とする。According to a sixth aspect of the present invention, in the first or the second aspect of the invention, the irregular reflection portion is a surface coated with white paint or printing.
【００１３】本発明の請求項７の発明は、請求項１乃至
請求項５のいずれかに記載の発明において、前記導光板
の少なくとも前記入光面及び前記出光面を除いた周面に
は金属めっき又は蒸着が施されていることを特徴とす
る。According to a seventh aspect of the present invention, in the first aspect of the present invention, at least a peripheral surface of the light guide plate excluding the light incident surface and the light exit surface is made of metal. It is characterized by being subjected to plating or vapor deposition.
【００１４】本発明の請求項８の発明は、請求項１乃至
請求項６のいずれかに記載の発明において、前記導光板
の少なくとも前記入光面及び前記出光面を除いた周面に
は白色塗装または印刷が施されていることを特徴とす
る。According to an eighth aspect of the present invention, in the invention according to any one of the first to sixth aspects, at least a peripheral surface of the light guide plate excluding the light incident surface and the light exit surface is white. It is characterized by being painted or printed.
【００１５】本発明の請求項９の発明は、請求項１乃至
請求項８のいずれかに記載の発明において、前記導光板
の前記入光面及び前記出光面を除いた周面の、乱反射部
以外の部分を全反射部としたことを特徴とする。According to a ninth aspect of the present invention, in the invention according to any one of the first to eighth aspects, the irregular reflection portion is provided on a peripheral surface of the light guide plate excluding the light incident surface and the light exit surface. The other parts are characterized as total reflection parts.
【００１６】本発明の請求項１０の発明は、請求項１乃
至請求項９のいずれかに記載の発明において、前記導光
板の少なくとも前記入光面及び前記出光面を除いた周面
に近接して反射部材を配設したことを特徴とする。According to a tenth aspect of the present invention, in the invention according to any one of the first to ninth aspects, at least a peripheral surface of the light guide plate excluding the light incident surface and the light exit surface is provided. And a reflection member is provided.
【００１７】本発明の請求項１１の発明は、請求項１０
記載の発明において、前記反射部材は反射シートである
ことを特徴とする。The invention of claim 11 of the present invention is the invention of claim 10
In the above invention, the reflection member is a reflection sheet.
【００１８】本発明の請求項１２の発明は、請求項１０
記載の発明において、前記面状光源ユニットを収納する
ケースが前記反射部材を兼ねていることを特徴とする。The invention of claim 12 of the present invention is the invention of claim 10
In the invention described in the above, a case accommodating the planar light source unit also serves as the reflection member.
【００１９】本発明の請求項１３の発明は、請求項１乃
至請求項１２のいずれかに記載の発明において、前記Ｌ
ＥＤは白色ＬＥＤであることを特徴とする。According to a thirteenth aspect of the present invention, in the invention according to any one of the first to twelfth aspects, the L
The ED is a white LED.
【００２０】本発明の請求項１４の発明は、請求項１乃
至請求項１２のいずれかに記載の発明において、前記Ｌ
ＥＤは前記導光板の厚み方向一列に配置したＲ、Ｇ、Ｂ
の３色のＬＥＤであることを特徴とする。The invention according to claim 14 of the present invention is the invention according to any one of claims 1 to 12, wherein the L
ED is R, G, B arranged in a line in the thickness direction of the light guide plate.
Characterized by the following three colors:
【００２１】[0021]
【発明の実施の形態】以下、本発明の実施形態を図面に
基づいて詳細に説明する。図１は本発明の一実施形態で
ある面状光源ユニットの斜視図、図２は図１の部分斜視
図、図３は図２の中央縦断面図、図４はその部分断面図
である。図５はその要部平面図である。Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a perspective view of a planar light source unit according to an embodiment of the present invention, FIG. 2 is a partial perspective view of FIG. 1, FIG. 3 is a longitudinal sectional view at the center of FIG. 2, and FIG. FIG. 5 is a plan view of the main part.
【００２２】まず、本発明の実施形態の構成を説明す
る。図１において、１０はバックライト付きの液晶表示
装置のバックライトを構成する面状光源ユニットであ
り、４０は、後述する導光板の光源部と垂直方向に重な
らない位置に配設した前記液晶表示装置の表示パネルで
ある。First, the configuration of the embodiment of the present invention will be described. In FIG. 1, reference numeral 10 denotes a planar light source unit which constitutes a backlight of a liquid crystal display device with a backlight, and reference numeral 40 denotes a liquid crystal display provided at a position which does not vertically overlap a light source portion of a light guide plate described later. It is a display panel of a device.
【００２３】面状光源ユニット１０を一つの光源部を持
つ１ユニットの図面により説明する。図２、図３におい
て、１１は透明プラスチック等の透光性部材からなる平
板状の導光板であり、２０は導光板１１の側面の平面方
向に２カ所配設された光源としてのＬＥＤである。３０
は導光板１１から外側に出た光を全反射させる機能を表
面に持つ反射部材であり、後述の入光面と出光面とを除
いた導光板１１の周面に近接して配設されている。The planar light source unit 10 will be described with reference to the drawing of one unit having one light source unit. 2 and 3, reference numeral 11 denotes a flat light guide plate made of a light-transmissive member such as transparent plastic, and reference numeral 20 denotes LEDs as light sources provided at two places in the plane direction of the side surface of the light guide plate 11. . 30
Is a reflection member having a function of totally reflecting light emitted outside from the light guide plate 11, and is disposed close to a peripheral surface of the light guide plate 11 excluding a light entrance surface and a light exit surface described later. I have.
【００２４】導光板１１の細部を更に説明する。１２は
導光板１１の平面形状が略直角四辺形の部分である出光
部であり、１３は出光部１２の光源側の仮想側面ｍに連
続して、仮想側面ｍ部分を外側へ行くに従い幅寸法を減
ずるようにして山形に膨出延在させた光源部１３であ
る。導光板１１は周面全体を鏡面に仕上げた上に、部分
的に１４の全反射部、１５の乱反射部を形成してあり、
内部の光線を反射させるようになっている。従って、周
面が透明な部分では、内部の光線の周面に対する臨界入
射角を越えた光は全反射し、臨界入射角未満の光は材料
に応じた屈折率で屈折して外部へ透過する。The details of the light guide plate 11 will be further described. Reference numeral 12 denotes a light emitting portion in which the planar shape of the light guide plate 11 is a substantially right-angled quadrilateral, and 13 denotes a width dimension which is continuous with the virtual side surface m on the light source side of the light emitting portion 12 and goes outward from the virtual side surface m. The light source unit 13 swells and extends in a chevron shape so as to reduce the angle. The light guide plate 11 has a mirror-finished entire peripheral surface, and partially has 14 totally reflecting portions and 15 irregularly reflecting portions.
It reflects internal light rays. Therefore, in the portion where the peripheral surface is transparent, light exceeding the critical incident angle of the internal light rays with respect to the peripheral surface is totally reflected, and light less than the critical incident angle is refracted with a refractive index according to the material and transmitted to the outside. .
【００２５】ここで全反射部１４とは、白色の印刷又は
塗装を施した面、金属メッキ又は蒸着を施した面、又は
背後に近接して反射部材３０が配設された面である。乱
反射部１５とは、微細な半球状の窪みや微細な凹凸、あ
るいはこれらの凹凸面に、白色の印刷又は塗装、金属め
っき又は蒸着などの良好な反射機能を持つ表面処理を施
したもの、また、平面に白色の塗装又は印刷を施した面
であってもよい。Here, the total reflection portion 14 is a surface on which white printing or painting has been performed, a surface on which metal plating or vapor deposition has been performed, or a surface on which the reflection member 30 is disposed close to the back. The irregular reflection part 15 is a fine hemispherical dent or fine irregularities, or a surface which has a good reflection function such as white printing or painting, metal plating or vapor deposition on these irregular surfaces, or Alternatively, the surface may be a surface on which white paint or printing is applied to a flat surface.
【００２６】出光部１２の上面１２ａは出光面となる透
明な鏡面である。出光部１２の仮想側面ｍに対向する側
面１２ｃ及び両側面１２ｄは、乱反射部のみの面として
あるが、これを全反射部１４のみ、または乱反射部１
５、又は両者の混在した反射面としてもよい。図３に示
すように、出光部１２下面１２ｂは全反射部１４と乱反
射部１５とが混在した面であり、光源から遠ざかるに従
い乱反射部１５の面積比が増大するように形成されてい
る。The upper surface 12a of the light emitting section 12 is a transparent mirror surface serving as a light emitting surface. Although the side surface 12c and both side surfaces 12d facing the virtual side surface m of the light emitting unit 12 are surfaces of only the diffuse reflection unit, this is only the total reflection unit 14 or the diffuse reflection unit 1.
5, or a mixed surface of both. As shown in FIG. 3, the lower surface 12b of the light emitting section 12 is a surface on which the total reflection section 14 and the irregular reflection section 15 are mixed, and is formed so that the area ratio of the irregular reflection section 15 increases as the distance from the light source increases.
【００２７】各々の光源部１３の上、下面１３ｂ、１３
ｃは全反射部１４と乱反射部１５とが混在した面であっ
てもよい。光源部１３の各々のＬＥＤ２０に対向する側
面である入光面１３ｆはＬＥＤ２０からの光が略垂直に
当たるように略円筒面の一部を成しており、透明な鏡面
に形成されている。The upper and lower surfaces 13b, 13 of each light source unit 13
c may be a surface in which the total reflection portion 14 and the irregular reflection portion 15 are mixed. The light incident surface 13f, which is a side surface facing each LED 20, of the light source unit 13 forms a part of a substantially cylindrical surface so that light from the LED 20 irradiates substantially vertically, and is formed as a transparent mirror surface.
【００２８】各々のＬＥＤ２０の両側面１３ｄには、平
面方向断面が略円弧形状の、導光板１１の厚み方向に略
平行な溝が乱反射部１５として光源から遠くなるに従っ
て面積比が増大するように形成されており、光源から直
接間接にきた光を光源部１３内全方向に反射させる機能
を持つ。なお、この乱反射部１５は必ずしもこのような
溝に限らず、上述したものでもよい。また、両側面１３
ｄは平面でも適宜に湾曲した面であってもよい。On both side surfaces 13d of each LED 20, grooves having a substantially arc-shaped cross section in a plane direction and substantially parallel to the thickness direction of the light guide plate 11 are formed as irregular reflection portions 15 so that the area ratio increases as the distance from the light source increases. It has a function of reflecting light coming directly and indirectly from the light source in all directions in the light source unit 13. The irregular reflection portion 15 is not necessarily limited to such a groove, but may be the one described above. Also, both side surfaces 13
d may be a flat surface or an appropriately curved surface.
【００２９】光源部１３の内部には断面略二等辺三角形
状の垂直な貫通穴である１６の反射屈折部が前記三角形
状の頂点１６ａを各々のＬＥＤ２０に向けるように形成
されている。反射屈折部１６の二等辺に当たる境界面１
６ｂは透明な鏡面に仕上げられており、その平面方向断
面は出光点からの光に対して臨界入射角より大きな角度
をもって傾斜しており、ＬＥＤ２０からきた光を光源部
１３の両側面１３ｄ方向に全反射させるが、他の方向か
らきた光は屈折通過させる機能を持つ反射屈折面となっ
ている。なお、この境界面１６ｂは平面でも適宜に湾曲
した面であってもよい。例えば、境界面１６ｂを放物面
となるように形成し、放物面の焦点の位置に光源をおく
ようにしてもよい。前記三角形状の底辺に当たる境界面
１６ｃは透明な鏡面又は透明な乱反射部１５、又はこれ
らが混在した面であってもよい。Inside the light source 13, sixteen catadioptric portions, each of which is a vertical through hole having a substantially isosceles triangular cross section, are formed so as to direct the apex 16 a of the triangular shape to each LED 20. Boundary surface 1 corresponding to isosceles of catadioptric part 16
6b is finished in a transparent mirror surface, and its cross section in the plane direction is inclined at an angle larger than the critical incident angle with respect to the light from the light emitting point, and the light from the LED 20 is directed toward both side surfaces 13d of the light source unit 13. It is a catadioptric surface that has the function of totally reflecting but refracting and passing light coming from other directions. The boundary surface 16b may be a flat surface or a surface that is appropriately curved. For example, the boundary surface 16b may be formed to be a paraboloid, and the light source may be located at the focal point of the paraboloid. The boundary surface 16c corresponding to the bottom of the triangular shape may be a transparent mirror surface or a transparent diffuse reflection portion 15, or a surface in which these are mixed.
【００３０】なお、反射屈折部１６は必ずしも貫通穴で
ある必要はなく、上、下面１３ｂ、１１ｃのいずれか又
は両方から明けられた貫通しない穴であってもよい。ま
た、境界面１６ｂ、１６ｃには、その上から更に金属め
っき又は蒸着してもよく。そのときには、境界面イｂは
全反射部１４に、１６ｃは全反射部１４又は乱反射部１
５、又は両者の混在した面とする。The catadioptric portion 16 does not necessarily have to be a through hole, but may be a non-penetrating hole formed from one or both of the upper and lower surfaces 13b and 11c. Further, metal plating or vapor deposition may be further performed on the boundary surfaces 16b and 16c. At that time, the boundary surface b is on the total reflection portion 14, and 16c is on the total reflection portion 14 or the irregular reflection portion 1.
5 or a mixed surface of both.
【００３１】上記反射部材３０は、少なくとも入光面１
３ｆ及び出光面１２ａを除いた導光板１１の周面（１２
ｂ、１２ｃ、１２ｄ、１３ｂ、１３ｃ、１３ｄ）の外部
に光が漏れる部分に配設すると有効な部材であり、表面
を白色塗装又は印刷、金属めっき又は蒸着で処理した
り、金属箔をラミネートした紙、金属板やプラスチック
板などの反射シートである。また、面状光源ユニット１
０を収納する表面に反射機能を持つ図示しな１５ースが
反射部材３０を兼ねていてもよい。そして、このケース
は前記液晶表示装置の収納部、又は前記液晶表示装置を
持つ電子機器の筐体であってもよい。なお、導光板１１
の周面（１２ｂ、１２ｃ、１２ｄ、１３ｂ、１３ｃ、１
３ｄ）の金属めっき又は蒸着が施された部分に対して
は、必ずしも反射部材３０は必要ではない。The reflecting member 30 has at least a light incident surface 1.
3f and the peripheral surface (12) of the light guide plate 11 excluding the light exit surface 12a.
b, 12c, 12d, 13b, 13c, 13d) is an effective member to be disposed in a portion where light leaks to the outside. The surface is treated by white painting or printing, metal plating or vapor deposition, or metal foil is laminated. It is a reflection sheet such as paper, a metal plate or a plastic plate. Further, the planar light source unit 1
An unillustrated 15-th surface having a reflection function on the surface for storing 0 may also serve as the reflection member 30. The case may be a housing portion of the liquid crystal display device or a housing of an electronic device having the liquid crystal display device. The light guide plate 11
Peripheral surfaces (12b, 12c, 12d, 13b, 13c, 1
The reflecting member 30 is not necessarily required for the portion where the metal plating or vapor deposition is performed in 3d).
【００３２】光源は前述したものに限らず、例えば１個
又は導光板１１の厚み方向に一列に配列した任意の複数
のＬＥＤであってもよいし、色は白など適宜な色でもよ
い。なお、光源ＬＥＤ２０から出光部１２までの距離が
大きいと出光部１２へ入る光の強さが弱まるので必要以
上大きくとらない。なお、以上の説明では光源部１３は
２個としたが、光源部は本実施形態に限らず出光面の面
積に応じて任意の数でもよい。The light source is not limited to the one described above, and may be, for example, one or an arbitrary plurality of LEDs arranged in a line in the thickness direction of the light guide plate 11, and the color may be an appropriate color such as white. If the distance from the light source LED 20 to the light emitting unit 12 is large, the intensity of light entering the light emitting unit 12 is reduced, so that the light intensity is not increased more than necessary. In the above description, the number of the light source units 13 is two, but the number of the light source units is not limited to this embodiment, and may be any number according to the area of the light emitting surface.
【００３３】次に、本実施形態の作用について説明す
る。ＬＥＤ２０を出た光は導光板１１の入光面１３ｆか
ら内部に進入し、ＬＥＤ２０の前方に向かった光は反射
屈折部１６の境界面１６ｂに当たって反射し、両側面１
３ｄ方向に向かう。なお、ここで境界面１６ｂが放物面
でありその焦点の位置に光源がある場合には、光源から
出て反射屈折部１６を反射した光は平行光線となる。Next, the operation of the present embodiment will be described. The light exiting the LED 20 enters the interior through the light incident surface 13f of the light guide plate 11, and the light traveling forward of the LED 20 strikes the boundary surface 16b of the catadioptric portion 16 and is reflected.
Head in the 3d direction. Here, when the boundary surface 16b is a paraboloid and the light source is located at the focal point, light emitted from the light source and reflected by the catadioptric unit 16 is a parallel light beam.
【００３４】また、反射屈折部１６が貫通穴である場合
には、ＬＥＤ２０から出て直接反射屈折部１６方向に向
かった光は、反射屈折部１６の背後の出光部１２では全
て遮られる一方、反射屈折部１６の両端部１６ｄの外側
では直接出光部１２に進入することになるため、図５に
示すように、ＬＥＤ２０の出光点２０ａと両端部１６ｄ
とを結ぶ仮想線Ｌ上の出光面に輝度の境目が生じやす
い。しかし、境界面１６ｂ、１６ｃを透明にしてあるた
め、光源部１３内の光は一部反射屈折部１６を屈折通過
しこれを補償する。光源部１３の上、下面上１３ｂ、１
３ｃのいずれかに乱反射部１５を形成し、乱反射部１５
の形成密度を部分的に調整して更に輝度の境目を目立た
なくすることができる。又異なる方向から境界面１６ｂ
に向かった光は屈折通過することで前記境目が緩和され
る。更に又、出光部１２側から境界面１６ｃに当たる光
が反射することで同じく前記境目を目立たなくする。When the catadioptric portion 16 is a through hole, all the light emitted from the LED 20 and directed directly toward the catadioptric portion 16 is blocked by the light emitting portion 12 behind the catadioptric portion 16, while Outside the both ends 16d of the catadioptric unit 16, the light enters the light emitting unit 12 directly, so as shown in FIG.
Are likely to occur on the light exit surface on the virtual line L connecting However, since the boundary surfaces 16b and 16c are transparent, the light in the light source unit 13 partially refracts and passes through the catadioptric unit 16 to compensate for this. Upper and lower surfaces 13b, 1
3c, the irregular reflection portion 15 is formed.
Can be partially adjusted to further make the boundary of luminance less noticeable. Also, the boundary surface 16b from a different direction
The boundary is relieved by refracting and passing light traveling toward. Furthermore, the light that strikes the boundary surface 16c is reflected from the light emitting portion 12 side, thereby making the boundary inconspicuous.
【００３５】反射屈折部１６が貫通しない穴である場合
には、ＬＥＤ２０の前方に向かった光の一部は反射屈折
部１６の上又は下の光源部１３内を通過して直接出光部
１２へと向かうので、前記輝度の境界線は生じにくくな
る。If the catadioptric portion 16 is a hole that does not penetrate, a part of the light directed toward the front of the LED 20 passes through the light source portion 13 above or below the catadioptric portion 16 and directly to the light emitting portion 12. Therefore, the boundary line of the luminance hardly occurs.
【００３６】両側面１３ｄの乱反射部１５又は全反射部
１４に当たって反射した光はほぼ出光部１２方向である
全方向に向かう。その一部は再び反射屈折部１６に向か
うが、光の進入方向によっては、境界面１６ｂ、１６ｃ
で反射せず、屈折し通過して出光部１２方向へ向かう。
その後の動向はＬＥＤ２０から前方に向かった光と同様
である。光源部１３が山形になっていることで、山裾の
光源から離れて暗くなる部分の光密度を上げることにな
り、暗くなることを補償している。Light reflected on the irregular reflection portion 15 or the total reflection portion 14 on both side surfaces 13d travels in almost all directions, that is, the direction of the light emitting portion 12. A part thereof goes to the catadioptric portion 16 again, but depending on the direction of light entry, the boundary surfaces 16b, 16c
The light is refracted, passes through, and travels in the direction of the light emitting portion 12 without being reflected.
The subsequent movement is the same as the light heading forward from the LED 20. Since the light source unit 13 has a mountain shape, the light density of a portion that becomes dark away from the light source at the foot of the mountain increases, thereby compensating for the darkening.
【００３７】ＬＥＤ２０から直接間接に上、下面１３
ｂ、１３ｃに向かった光は入射角の関係で一部は屈折し
て外側に通過するが外側にある反射部材３０で反射して
光源部１３内に戻るので結局大部分は上、下面１３ｂ、
１３ｃで反射して仮想側面ｍから出光部１２方向へ向か
う。このように、光源部１３は、点状光源であるＬＥＤ
２０から出た光を仮想側面ｍの長手方向に展開させるよ
うに光の進行方向を変換させる光変換部を含んだ線状光
源部とも言える。The upper and lower surfaces 13 directly and indirectly from the LED 20
The light directed to b and 13c is partially refracted and passes outward due to the incident angle, but is reflected by the reflective member 30 on the outside and returns to the inside of the light source unit 13;
The light is reflected by 13 c and travels from the virtual side surface m toward the light emitting unit 12. As described above, the light source unit 13 is an LED that is a point light source.
It can also be said to be a linear light source unit including a light conversion unit that changes the traveling direction of light so that light emitted from 20 is developed in the longitudinal direction of the virtual side surface m.
【００３８】図４に示すように、出光部１２へ進入し、
上、下面１２ａ、１２ｂに平行に進んだ光ｐは、側面１
２ｃ、１２ｄの乱反射部１５に当たった場合には乱反射
して出光部１２内の全方向へ向かう。全反射部クに当た
った場合には導光板１１内を反射しやがて各所に存在す
る乱反射部１５に当たって全方向に反射する。光源部１
３から直接間接に下面１２ｂ方向へ進んだ光ｑは、下面
の乱反射部１５により乱反射してほぼ出光面である上面
１２ａ方向へ向かう。乱反射部１４が形成されていない
部分ではほぼ全反射して光源より更に遠方に向かう。出
光面１２ａに向かった光も入射角によっては全反射する
ものもあり、屈折透過するものもある。従って導光板１
１内ではあらゆる方向の光が飛び交うことになり、一部
は下面１２ｂから外側へ出てゆくが、反射シートなどの
反射部材３０が近接して配設されている場合には、再び
下面１２ｂから内部へ入り上面１２ａへ向かう。以上の
ようにして、光源から出た光は、大部分が出光面である
導光板１１の上面１２ａから上方へ出て、表示パネル４
０を背面から照射することになる。As shown in FIG. 4, the light enters the light emitting unit 12,
The light p traveling parallel to the upper and lower surfaces 12a and 12b
When the light strikes the irregular reflection portions 15 of 2c and 12d, the light is irregularly reflected and travels in all directions in the light emitting portion 12. When the light hits the total reflection portion h, the light is reflected in the light guide plate 11 and eventually hits the diffuse reflection portions 15 existing in various places and is reflected in all directions. Light source unit 1
Light q that has directly and indirectly traveled from 3 toward the lower surface 12b is irregularly reflected by the irregular reflection portion 15 on the lower surface, and travels toward the upper surface 12a, which is almost a light emitting surface. In a portion where the irregular reflection portion 14 is not formed, the light is substantially totally reflected and further goes farther than the light source. Depending on the angle of incidence, some of the light traveling toward the light exit surface 12a may be totally reflected, and some may be refracted and transmitted. Therefore, the light guide plate 1
In 1, light in all directions flies, and a part of the light goes outward from the lower surface 12 b. However, when the reflective member 30 such as a reflective sheet is disposed close to the lower surface 12 b, the light from the lower surface 12 b again comes out. It goes inside and goes to the upper surface 12a. As described above, most of the light emitted from the light source exits upward from the upper surface 12a of the light guide plate 11, which is the light emitting surface, and
0 will be emitted from the back.
【００３９】次に本実施形態の効果について説明する。
導光板１１に光源部１３を形成し、これに反射屈折部１
６を設けたので、ＬＥＤ２０を出た中心近傍の輝度の強
い光の一部を直接出光部１２へ入らせず両側面１３ｄ方
向へ向けることができる。また、両側面１３ｄの乱反射
部１５を光源から遠ざかるほど面積比が大きくなるよう
に形成したので、ＬＥＤ２０に近い部分の光を抑制して
遠い部分の光量の減少を補う。従って、出光部１２の仮
想側面ｍにおける光の均一化が計ることができるので、
光源部１３において輝度ムラの少ない線状光源が形成さ
れる。更に出光部１２下面１２ｂの乱反射部１５がＬＥ
Ｄ２０から遠いところほど面積比が大きくなるように設
けてあるので、光源からの距離に応じて生じるはずの輝
度の低下を補って出光面から出射される光も均一にでき
る。Next, the effect of this embodiment will be described.
A light source unit 13 is formed on a light guide plate 11 and a catadioptric unit 1
The provision of 6 enables a part of the high-brightness light near the center of the LED 20 to be directed to the side surfaces 13 d without directly entering the light emitting unit 12. In addition, since the irregular reflection portions 15 on the both side surfaces 13d are formed so that the area ratio increases as the distance from the light source increases, the light in the portion close to the LED 20 is suppressed to compensate for the decrease in the light amount in the portion far from the LED 20. Therefore, it is possible to measure the uniformity of the light on the virtual side surface m of the light emitting unit 12, so that
A linear light source with less luminance unevenness is formed in the light source unit 13. Further, the irregular reflection part 15 on the lower surface 12b of the light emitting part 12 is LE
Since the area ratio is increased as the distance from the light source D20 increases, the light emitted from the light emitting surface can be made uniform by compensating for the decrease in luminance that would occur in accordance with the distance from the light source.
【００４０】更に、導光板の側面に沿って複数の光源部
を配設することにより、より広範囲の均一な照明の面状
光源ユニットが実現できる。なお、比較的狭い面積の面
状光源ユニットの場合には、光源部が１個であっても成
立することは勿論である。Further, by arranging a plurality of light sources along the side surface of the light guide plate, a planar light source unit for uniform illumination over a wider range can be realized. In the case of a planar light source unit having a relatively small area, it is needless to say that the light source unit can be realized even with one light source unit.
【００４１】少ないＬＥＤの数で輝度ムラのない長範囲
の線状光源部が形成できるので、面状光源ユニットのＬ
ＥＤ数を従来より削減できる。従って、消費電力、コス
トの面で有利である。各々の光源のＬＥＤを垂直一列に
複数配設する場合には、より明るい線状光源部を構成で
き、惹いては出光面から放射される光も均一にできる。
白色ＬＥＤを用いることにより、明るく見易い液晶表示
装置が得られる。また、垂直一列にＲ、Ｇ、Ｂの３色の
ＬＥＤを配設することにより、発光色を自由に変えられ
る。Since a linear light source portion having a long range without luminance unevenness can be formed with a small number of LEDs, the L of the planar light source unit can be reduced.
The number of EDs can be reduced than before. Therefore, it is advantageous in terms of power consumption and cost. When a plurality of LEDs of each light source are arranged in a line in a vertical direction, a brighter linear light source section can be formed, and thus the light emitted from the light emitting surface can be made uniform.
By using a white LED, a bright and easy-to-see liquid crystal display device can be obtained. Further, by arranging LEDs of three colors of R, G, and B in one vertical line, the emission color can be freely changed.
【００４２】導光板１１の下面１２ｂばかりでなく、少
なくとも入光面１３ｆ及び出光面１２ａを除いた周面
（１２ｂ、１２ｃ、１２ｄ、１３ｂ、１３ｃ、１３ｄ）
に乱反射部１５を形成した、あるいは反射部材３０を近
接配置したので、外に漏れてロスとなる光を極めて少な
くすることができ、ＬＥＤ２０の光を有効活用できる。The peripheral surfaces (12b, 12c, 12d, 13b, 13c, 13d) excluding at least the light entrance surface 13f and the light exit surface 12a as well as the lower surface 12b of the light guide plate 11
Since the irregular reflection portion 15 is formed on the surface of the substrate or the reflection member 30 is disposed in the vicinity, the amount of light leaking to the outside and causing loss can be extremely reduced, and the light of the LED 20 can be used effectively.
【００４３】[0043]
【発明の効果】以上説明したように、本発明によれば、
導光板の出光部の光源側の一側面に出光部から光源側に
山形に延在させそれぞれにＬＥＤを近接配置した複数の
光源部を設け、更に各々の光源部内に反射屈折面を持つ
反射屈折部を設け、更に各々の光源部のＬＥＤの両側面
に乱反射部を設けたので、コスト上も、消費電力上も有
利で出光面の明るさが均一な比較的広範囲の面状光源ユ
ニットを提供することができるようになった。As described above, according to the present invention,
Provided on one side of the light source side of the light emitting portion of the light guide plate are a plurality of light source portions which extend in a mountain shape from the light emitting portion to the light source side and each of which has an LED arranged close to each other, and each of which has a catadioptric surface in each light source portion Parts, and irregular reflection parts are provided on both sides of the LED of each light source part, so that a relatively wide area light source unit with uniform brightness of the light-emitting surface, which is advantageous in terms of cost and power consumption, is provided. You can now.
【００４４】導光板の少なくとも入光面及び出光面を除
いた周面に、乱反射部又は全反射部を形成し、また、更
に乱反射部には白色塗装又は印刷し、一方、全反射部は
金属めっき又は蒸着した面としたので、出光面以外の導
光板周面からの光の漏出を制限し、ＬＥＤ光量の有効活
用が計れるようになった。The light guide plate is provided with a diffuse reflection portion or a total reflection portion on at least the peripheral surface excluding the light entrance surface and the light exit surface. Further, the diffuse reflection portion is painted or printed in white, while the total reflection portion is made of metal. Since the surface is plated or vapor-deposited, leakage of light from the peripheral surface of the light guide plate other than the light exit surface is restricted, and effective use of the LED light amount can be achieved.
【００４５】更に、導光板の少なくとも入光面と出光面
とを除いた周面に近接して反射部材を配設したので、導
光面外に漏出する光をなくして、光源の光を有効に活用
して明るい面状光源ユニットが得られた。Further, since the reflecting member is arranged close to the peripheral surface of the light guide plate except at least the light entrance surface and the light exit surface, light leaking out of the light guide surface is eliminated, and the light of the light source is effectively used. And a bright planar light source unit was obtained.
【００４６】Ｒ、Ｇ、Ｂの３色のＬＥＤを導光板の厚み
方向一列に配置したので、輝度の均一な発光色を自由に
変えられる面状光源ユニットが得られた。Since the LEDs of the three colors R, G, and B were arranged in a line in the thickness direction of the light guide plate, a planar light source unit capable of freely changing the emission color with uniform luminance was obtained.
【図１】本発明の実施形態である面状光源ユニットの斜
視図である。FIG. 1 is a perspective view of a planar light source unit according to an embodiment of the present invention.
【図２】本発明の実施形態である面状光源ユニットの部
分斜視図である。FIG. 2 is a partial perspective view of a planar light source unit according to an embodiment of the present invention.
【図３】本発明の実施形態である面状光源ユニットの平
面図である。FIG. 3 is a plan view of a planar light source unit according to an embodiment of the present invention.
【図４】本発明の実施形態である面状光源ユニットの部
分断面図である。FIG. 4 is a partial cross-sectional view of a planar light source unit according to an embodiment of the present invention.
【図５】本発明の実施形態である面状光源ユニットの要
部平面図である。FIG. 5 is a plan view of a main part of a planar light source unit according to an embodiment of the present invention.
【図６】従来の面状光源ユニットを示す斜視図である。FIG. 6 is a perspective view showing a conventional planar light source unit.
【図７】従来の面状光源ユニットを示す断面図である。FIG. 7 is a cross-sectional view showing a conventional planar light source unit.
１０ 面状光源ユニット １１ 導光板 １２ 出光部 １２ａ 上面（出光面） １２ｂ 下面 １２ｃ、１２ｄ 側面 １３ 光源部 １３ｂ 上面 １３ｃ 下面 １３ｄ 側面 １３ｆ 入光面 １４ 全反射部 １５ 乱反射部 １６ 反射屈折部 １６ｂ、１６ｃ 境界面 ２０ ＬＥＤ ２０ａ 出光点 ３０ 反射部材 ４０ 表示パネル DESCRIPTION OF SYMBOLS 10 Planar light source unit 11 Light guide plate 12 Light emission part 12a Upper surface (light emission surface) 12b Lower surface 12c, 12d Side surface 13 Light source part 13b Upper surface 13c Lower surface 13d Side surface 13f Light entrance surface 14 Total reflection part 15 Diffuse reflection part 16 Reflection / refraction part 16b, 16c Boundary surface 20 LED 20a Light emitting point 30 Reflecting member 40 Display panel
Claims (14)
に乱反射部を形成して上面を出光面とした導光板と、該
導光板の側面に近接配置した光源のＬＥＤとからなり、
該ＬＥＤから前記導光板の側面に入射した光を前記出光
面から出射させるようにしたエッジライト方式の面状光
源ユニットにおいて、前記導光板の前記ＬＥＤ側の一側
面が前記出光面から前記ＬＥＤ側に延在する複数の光源
部を設け、各々の該光源部に対応して前記ＬＥＤを配設
し、前記光源部内に前記導光板の厚み方向断面が垂直で
あり平面方向断面が前記ＬＥＤの出光点に対して傾斜し
た反射屈折面を持つ貫通穴又は貫通しない穴からなる反
射屈折部を前記ＬＥＤと対向するように設け、前記光源
部の前記ＬＥＤ側の両側面に乱反射部を設けたことを特
徴とする面状光源ユニット。1. A light guide plate which is a plate-shaped member made of a light-transmissive member and has a diffusely reflecting portion formed on a lower surface and an upper surface as a light emitting surface, and an LED of a light source disposed close to a side surface of the light guide plate,
In an edge light type planar light source unit configured to emit light incident on a side surface of the light guide plate from the LED from the light exit surface, one side surface of the light guide plate on the LED side is closer to the LED side than the light exit surface. A plurality of light source portions extending in the direction, and the LEDs are arranged corresponding to the respective light source portions. The light guide plate has a vertical section in the thickness direction and a planar section in the light source section. A catadioptric portion comprising a through-hole or a non-penetrating hole having a catadioptric surface inclined with respect to a point is provided so as to face the LED, and irregularly reflecting portions are provided on both side surfaces of the light source portion on the LED side. Characteristic planar light source unit.
出光面を除いた周面に乱反射部を形成したことを特徴と
する請求項１記載の面状光源ユニット。2. The planar light source unit according to claim 1, wherein an irregular reflection portion is formed on at least a peripheral surface of the light guide plate excluding the light entrance surface and the light exit surface.
光板の厚み方向に略平行な断面略円弧形状の溝であるこ
とを特徴とする請求項１又は請求項２記載の面状光源ユ
ニット。3. The planar light source according to claim 1, wherein the irregular reflection portions on both side surfaces of the light source portion are grooves having a substantially arc-shaped cross section substantially parallel to a thickness direction of the light guide plate. unit.
を特徴とする請求項１又は請求項２記載の面状光源ユニ
ット。4. The planar light source unit according to claim 1, wherein the irregular reflection section is a hemispherical recess.
を特徴とする請求項１又は請求項２記載の面状光源ユニ
ット。5. The surface light source unit according to claim 1, wherein the irregular reflection portion has a fine uneven surface.
した面であることを特徴とする請求項１又は請求項２記
載の面状光源ユニット。6. The planar light source unit according to claim 1, wherein the irregular reflection portion is a surface on which white paint or printing is applied.
前記出光面を除いた周面には金属めっき又は蒸着が施さ
れていることを特徴とする請求項１乃至請求項５のいず
れかに記載の面状光源ユニット。7. The light guide plate according to claim 1, wherein at least a peripheral surface of the light guide plate excluding the light entrance surface and the light exit surface is subjected to metal plating or vapor deposition. The planar light source unit as described in the above.
前記出光面を除いた周面には白色塗装または印刷が施さ
れていることを特徴とする請求項１乃至請求項６のいず
れかに記載の面状光源ユニット。8. The light guide plate according to claim 1, wherein at least a peripheral surface of the light guide plate excluding the light entrance surface and the light exit surface is painted or printed. The planar light source unit as described in the above.
を除いた周面の、乱反射部以外の部分を全反射部とした
ことを特徴とする請求項１乃至請求項８のいずれかに記
載の面状光源ユニット。9. The light guide plate according to claim 1, wherein a portion other than the irregular reflection portion of the peripheral surface excluding the light entrance surface and the light exit surface is a total reflection portion. 2. The planar light source unit according to 1.
び前記出光面を除いた周面に近接して反射部材を配設し
たことを特徴とする請求項１乃至請求項９のいずれかに
記載の面状光源ユニット。10. The light guide plate according to claim 1, wherein a reflection member is arranged near at least a peripheral surface of the light guide plate excluding the light entrance surface and the light exit surface. Surface light source unit.
を特徴とする請求項１０記載の面状光源ユニット。11. The planar light source unit according to claim 10, wherein the reflection member is a reflection sheet.
スが前記反射部材を兼ねていることを特徴とする請求項
１０記載の面状光源ユニット。12. The planar light source unit according to claim 10, wherein a case accommodating the planar light source unit also serves as the reflection member.
特徴とする請求項１乃至請求項１２のいずれかに記載の
面状光源ユニット。13. The planar light source unit according to claim 1, wherein the LED is a white LED.
列に配置したＲ、Ｇ、Ｂの３色のＬＥＤであることを特
徴とする請求項１乃至請求項１２のいずれかに記載の面
状光源ユニット。14. The planar state according to claim 1, wherein the LEDs are LEDs of three colors of R, G, and B arranged in a line in a thickness direction of the light guide plate. Light source unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11214357A JP2001043719A (en) | 1999-07-28 | 1999-07-28 | Surface light source unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11214357A JP2001043719A (en) | 1999-07-28 | 1999-07-28 | Surface light source unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2001043719A true JP2001043719A (en) | 2001-02-16 |
Family
ID=16654452
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11214357A Pending JP2001043719A (en) | 1999-07-28 | 1999-07-28 | Surface light source unit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2001043719A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003084140A (en) * | 2001-09-12 | 2003-03-19 | Citizen Electronics Co Ltd | Surface light source unit |
| JP2004310002A (en) * | 2003-02-18 | 2004-11-04 | Toyota Industries Corp | Light guiding plate |
| JP2006007856A (en) * | 2004-06-23 | 2006-01-12 | Toyoda Gosei Co Ltd | Lighting system |
| KR100668314B1 (en) | 2004-11-22 | 2007-01-12 | 삼성전자주식회사 | Back light unit |
| JP2008518411A (en) * | 2004-10-28 | 2008-05-29 | デルフィ テクノロジーズ， インコーポレイテッド | Vehicle light |
| CN100445837C (en) * | 2003-10-23 | 2008-12-24 | 鸿富锦精密工业（深圳）有限公司 | Area illuminating apparatus and light conducting plate thereof |
| JP2015510654A (en) * | 2011-11-30 | 2015-04-09 | クォルコム・メムズ・テクノロジーズ・インコーポレーテッド | Light collimating manifold for generating multiple virtual light sources |
| WO2016027511A1 (en) * | 2014-08-20 | 2016-02-25 | 河西工業株式会社 | Passenger compartment illumination device |
-
1999
- 1999-07-28 JP JP11214357A patent/JP2001043719A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003084140A (en) * | 2001-09-12 | 2003-03-19 | Citizen Electronics Co Ltd | Surface light source unit |
| JP4592049B2 (en) * | 2001-09-12 | 2010-12-01 | シチズン電子株式会社 | Planar light source unit |
| JP2004310002A (en) * | 2003-02-18 | 2004-11-04 | Toyota Industries Corp | Light guiding plate |
| CN100445837C (en) * | 2003-10-23 | 2008-12-24 | 鸿富锦精密工业（深圳）有限公司 | Area illuminating apparatus and light conducting plate thereof |
| JP2006007856A (en) * | 2004-06-23 | 2006-01-12 | Toyoda Gosei Co Ltd | Lighting system |
| JP2008518411A (en) * | 2004-10-28 | 2008-05-29 | デルフィ テクノロジーズ， インコーポレイテッド | Vehicle light |
| JP4663732B2 (en) * | 2004-10-28 | 2011-04-06 | デルファイ・テクノロジーズ・インコーポレーテッド | Vehicle light |
| KR100668314B1 (en) | 2004-11-22 | 2007-01-12 | 삼성전자주식회사 | Back light unit |
| JP2015510654A (en) * | 2011-11-30 | 2015-04-09 | クォルコム・メムズ・テクノロジーズ・インコーポレーテッド | Light collimating manifold for generating multiple virtual light sources |
| WO2016027511A1 (en) * | 2014-08-20 | 2016-02-25 | 河西工業株式会社 | Passenger compartment illumination device |
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