JP2006196384A - Backlight module - Google Patents

Backlight module Download PDF

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JP2006196384A
JP2006196384A JP2005008669A JP2005008669A JP2006196384A JP 2006196384 A JP2006196384 A JP 2006196384A JP 2005008669 A JP2005008669 A JP 2005008669A JP 2005008669 A JP2005008669 A JP 2005008669A JP 2006196384 A JP2006196384 A JP 2006196384A
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guide plate
light guide
light
backlight module
face
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Akio Koike
章雄 小池
Kinju Taya
金重 田家
Chao-Pai Lee
昭霈 李
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Main Source Technology Co Ltd
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Main Source Technology Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a backlight module having a small number of components, a compact structure, and less unevenness of luminance. <P>SOLUTION: The backlight module comprises a light source 40, an end face 21 which is provided in parallel and adjacent to the light source 40 and to which the light from the light source 40 enters, an upper face 22 which adjoins the one end of the end face 21, and a bottom face 23 which adjoins the other end of the end face 21 and faces the upper face 22 back to back. There are installed a plurality of prism projections 24 having cross-sectional and nearly triangular mountain shape are formed, in parallel along the right angle direction to the end face 21 on the upper face 22; and on the bottom face 23, a light guide plate 20, in which a plurality of projections 25 protruding from the bottom face 23 in parallel with the end face 21 are arranged, a diffusion plate 10 which is provided facing the upper face 22 of the light guide plate 20, and a reflecting plate 30, which is provided facing the bottom face 23 of the light guide plate 20 and in which a series of parallel prism projections 32 having a cross-sectionally triangle mountain shape are formed at right angles with the prism projections 24 of the light guide plate 20. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は、バックライトモジュールに関し、より詳しくは、簡易な構造で高い輝度が得られるバックライトモジュールに関する。   The present invention relates to a backlight module, and more particularly to a backlight module that can obtain high luminance with a simple structure.

図１、２は、従来のバックライトモジュールを示す斜視図、断面図である。図１、２に示すように、該バックライトモジュールは、導光板１と、導光板１に隣接して設けられた光源２と、導光板１の底面１０４側に設けられた反射板３と、導光板１の上面１０３側に設けられた第１の拡散板４と、第１の拡散板４の上に設けられた第１の集光板（例えばプリズム板）５と、第１の集光板５の上に設けられた第２の集光板６と、第２の集光板６に設けられた第２の拡散板７とから構成される。棒状光源２からの光は、導光板１の、光源２と隣接した一端面１０１から導光板１内に入射し、導光板１内を全反射を繰り返しながら進み、光源２から離れた他端面１０２へ屈折反射される。なお、導光板１の上面１０３から平面状光出力を得るため、導光板１の底面１０４に、全反射ルートを散乱されるものとするための突起が多数形成されている。それにより、光源２からの一部の光は回折によって上面１０３から出ていく。反射板３は、導光板１の底面１０４より出てくる光を導光板１内に反射させて、光の出力効率を向上させる。第１の拡散板４は、導光板１の上面１０３から透過した光を第１、２の集光板５、６へ拡散させる。第１、２の集光板５、６は、それぞれ基板層に互いにＶ字形の条溝をなす一連の平行な三角山形の突条が形成されてなる。これらの２枚の集光板５、６は、突条の延びる方向が互いに直交するように配置される（プリズム構造が直交するように配置される）ことにより、導光板の上面１０３から出た光のある一部の方向成分が第１、２の集光板５、６を透過集光され第２の拡散板７を透過され図示しない液晶パネルへ出ていく。   1 and 2 are a perspective view and a sectional view showing a conventional backlight module. As shown in FIGS. 1 and 2, the backlight module includes a light guide plate 1, a light source 2 provided adjacent to the light guide plate 1, a reflector 3 provided on the bottom surface 104 side of the light guide plate 1, A first diffusion plate 4 provided on the upper surface 103 side of the light guide plate 1, a first light collecting plate (for example, prism plate) 5 provided on the first diffusion plate 4, and a first light collecting plate 5. The second light collecting plate 6 provided on the second light collecting plate 6 and the second light diffusion plate 7 provided on the second light collecting plate 6. Light from the rod-shaped light source 2 enters the light guide plate 1 from one end surface 101 of the light guide plate 1 adjacent to the light source 2, travels through the light guide plate 1 while repeating total reflection, and is separated from the light source 2. Refracted and reflected. In addition, in order to obtain a planar light output from the upper surface 103 of the light guide plate 1, a large number of protrusions for scattering the total reflection route are formed on the bottom surface 104 of the light guide plate 1. Thereby, a part of the light from the light source 2 exits from the upper surface 103 by diffraction. The reflection plate 3 reflects light that emerges from the bottom surface 104 of the light guide plate 1 into the light guide plate 1 to improve light output efficiency. The first diffusion plate 4 diffuses the light transmitted from the upper surface 103 of the light guide plate 1 to the first and second light collecting plates 5 and 6. Each of the first and second light collectors 5 and 6 is formed by forming a series of parallel triangular mountain-shaped protrusions that form V-shaped grooves on the substrate layer. These two light collecting plates 5 and 6 are arranged so that the extending directions of the ridges are orthogonal to each other (the prism structures are arranged to be orthogonal), so that the light emitted from the upper surface 103 of the light guide plate A certain directional component is transmitted and collected through the first and second light collectors 5 and 6 and transmitted through the second diffuser plate 7 and exits to a liquid crystal panel (not shown).

上記構成のような複数枚の集光板や拡散板を組合わせる方法は、輝度むらの抑制には効果が期待できるが、多数枚積層するために画面照度の低下を招くと共に製造コストを高くするので、やはり好ましくない。   The method of combining a plurality of light collectors and diffusers as in the above configuration can be expected to be effective in suppressing luminance unevenness. However, since a large number of layers are laminated, the screen illumination is reduced and the manufacturing cost is increased. After all, it is not preferable.

図３は、他の従来のバックライトモジュール例を示す斜視図である。図３に示すように、導光板８の上面部には、光源２と隣接した一端面８１の直交方向に平行に一連のＶ字形の溝が形成され、上方に設けられた集光板９の導光板８に対向した面には、前記Ｖ字形溝と直交して一連の三角山形の突条が設けられる。   FIG. 3 is a perspective view showing another conventional backlight module example. As shown in FIG. 3, a series of V-shaped grooves are formed in the upper surface portion of the light guide plate 8 in parallel to the orthogonal direction of the one end surface 81 adjacent to the light source 2, and the light guide plate 9 provided above is guided. On the surface facing the optical plate 8, a series of triangular mountain-shaped protrusions are provided orthogonal to the V-shaped groove.

かかる構成により、積層の厚さを減らしながら輝度むらの少ないバックライトモジュールを実現できるが、液晶表示装置の軽量、薄型化が進んでいる中、なおも輝度を落さずに部品数を減らさなければならない。   With such a configuration, a backlight module with less luminance unevenness can be realized while reducing the thickness of the stack. However, as the liquid crystal display device is becoming lighter and thinner, the number of parts must be reduced without reducing the luminance. I must.

本発明は、上記問題点を解消するためになされたものであり、輝度が高く、部品数が少なく、構造がコンパクトになるバックライトモジュールを提供することを目的とする。   The present invention has been made to solve the above problems, and an object of the present invention is to provide a backlight module having high luminance, a small number of components, and a compact structure.

上記目的の一観点によれば、本発明は、光源と、前記光源と平行に隣り合わせて設けられ、前記光源からの光が入射する一端面と、前記端面の一端に隣接した上面と、前記端面の他端に隣接し前記上面と背中合せの底面とを有し、前記上面に、前記端面に対して直角方向に沿って平行に並んだ複数の断面ほぼ三角山形のプリズム突条を形成し、前記底面に、前記端面と平行して前記底面より突出した突起が複数配列されている導光板と、前記導光板の上面と面して設けられた拡散板と、前記導光板の底面に面して設けられ、前記導光板の底面側の上面に、一連の平行な断面三角山形のプリズム突条が前記導光板のプリズム突条と直角に形成された反射板と、を具備することを特徴とするバックライトモジュールを提供しようとする。   According to one aspect of the above object, the present invention provides a light source, an end surface that is provided adjacent to and parallel to the light source, is incident with light from the light source, an upper surface that is adjacent to one end of the end surface, and the end surface. A plurality of substantially triangular mountain-shaped prism ridges arranged in parallel along a direction perpendicular to the end surface on the upper surface, A light guide plate in which a plurality of protrusions protruding from the bottom surface are arranged in parallel to the end surface, a diffusion plate provided facing the upper surface of the light guide plate, and a bottom surface of the light guide plate And a reflecting plate in which a series of parallel cross-sectional triangular mountain-shaped prism ridges are formed at right angles to the prism ridges of the light guide plate, on the top surface of the light guide plate on the bottom surface side. Try to provide a backlight module.

上記目的の他の観点によれば、外部の光源からの光が入射する一端面と、前記端面の一端に隣接した上面と、前記端面の他端に隣接し前記上面と面した底面と、前記底面に接したベース面より２つの凸曲面をした反射面が前記底面上の第１の角から頂点を経て第２の角に至る円弧形稜線で交り、前記両反射面と前記ベース面とで交った辺が、それぞれの頂点が互いに前記稜線の両側で前記頂点に対して両側へ片寄った非対称位置にある形状の曲線とする突起と、を具備することを特徴とする導光板を提供しようとする。   According to another aspect of the above object, one end surface on which light from an external light source enters, a top surface adjacent to one end of the end surface, a bottom surface adjacent to the other end of the end surface and facing the top surface, A reflecting surface having two convex curved surfaces from a base surface in contact with the bottom surface intersects with an arc-shaped ridge line from the first corner to the second corner on the bottom surface, and both the reflecting surface and the base surface A light guide plate characterized in that the side intersecting with each other comprises a protrusion having a shape in an asymmetrical position in which each vertex is on both sides of the ridge line and is offset to both sides with respect to the vertex. Try to provide.

ここで、本発明によれば、前記稜線の両側における反射面の傾斜は、該稜線上を接点とした接線がなす角度が８５°〜１４０°の範囲内であるように形成されることが好ましい。   Here, according to the present invention, the inclination of the reflection surface on both sides of the ridge line is preferably formed such that an angle formed by a tangent line having the contact point on the ridge line is within a range of 85 ° to 140 °. .

また、照射分布を均一にするため、前記突起は、導光板の光源に近い側から遠い側へ向うほど配列間隔を次第に短縮していくように設けられることが好ましい。   In order to make the irradiation distribution uniform, it is preferable that the protrusions are provided so that the arrangement interval is gradually shortened from the side closer to the light source of the light guide plate to the side farther from the light source plate.

本発明のバックライトモジュールによれば、導光板の光の出る一面、他面にそれぞれプリズム突条、突起が形成され、反射板の導光板寄りの一面にプリズム突条が設けられているので、従来装置と比べて照射輝度は劣らずに構成部品数を減らすことができる。また、突起は、導光板の光源に近い側から遠い側へ向うほど配列間隔を次第に短縮していくように設けられているので、照射分布を均一にさせ、照射品質を向上させることができる。   According to the backlight module of the present invention, the prism ridges and protrusions are formed on one surface and the other surface of the light guide plate where light is emitted, respectively, and the prism ridges are provided on one surface near the light guide plate of the reflector plate. Compared with the conventional apparatus, the number of components can be reduced without inferior irradiation brightness. In addition, since the protrusions are provided so as to gradually shorten the arrangement interval from the side closer to the light source of the light guide plate toward the side farther from, the irradiation distribution can be made uniform and the irradiation quality can be improved.

以下、図面を参照して本発明の望ましい実施形態をより詳細に説明する。   Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.

図４は、本発明にかかる一実施形態のバックライトモジュールの概略斜視図、図５は、同概略正面図、図６は、同バックライトモジュールにおける導光板の底面図である。   4 is a schematic perspective view of a backlight module according to an embodiment of the present invention, FIG. 5 is a schematic front view thereof, and FIG. 6 is a bottom view of a light guide plate in the backlight module.

本発明にかかる一実施形態のバックライトモジュールは、拡散板１０と、導光板２０と、反射板３０と、光源４０とを含む。光源４０は、断面Ｕ字形のリフレクタ付の棒状光源であり、棒状光源４０からの光を導光板２０へ入射させる。   The backlight module according to an embodiment of the present invention includes a diffusion plate 10, a light guide plate 20, a reflection plate 30, and a light source 40. The light source 40 is a rod-shaped light source with a reflector having a U-shaped cross section, and makes light from the rod-shaped light source 40 enter the light guide plate 20.

導光板２０は、光源４０と平行に隣り合わせて設けられ、光源４０からの光が入射する一端面２１と、この端面２１の一端に隣接した上面２２と、端面２１の他端に隣接し上面２２と背中合せの底面２３とを有し、上面２２に、端面２１に対して直角方向に沿って平行に並んだ複数の断面ほぼ三角山形のプリズム突条２４、２４、…が形成されている。また、導光板２０の底面２３に、端面２１と平行して底面２３より突出した多数突起２５、２５、…が配列されている。突条２４と突起２５とによって、導光板２０内のすべての反射ルートを不規則に散乱されるものとすることができる。   The light guide plate 20 is provided adjacent to and parallel to the light source 40, one end surface 21 on which light from the light source 40 enters, an upper surface 22 adjacent to one end of the end surface 21, and an upper surface 22 adjacent to the other end of the end surface 21. And a plurality of substantially triangular triangular prism ridges 24, 24,... Arranged in parallel along the direction perpendicular to the end surface 21. .. Are arranged on the bottom surface 23 of the light guide plate 20 in parallel with the end surface 21. By the protrusions 24 and the protrusions 25, all the reflection routes in the light guide plate 20 can be irregularly scattered.

拡散板１０は、導光板２０の上面２２に面して設けられ、該上面２２から出た光を図示しない液晶パネルへ透過させる。   The diffusion plate 10 is provided facing the upper surface 22 of the light guide plate 20 and transmits light emitted from the upper surface 22 to a liquid crystal panel (not shown).

反射板３０は、導光板２０の底面２３に面して設けられる。該反射板３０の導光板２０の底面２３に向いた上面３１に、導光板２０のプリズム突条２４と直角に一連の平行な断面三角山形のプリズム突条３２、３２、…が形成され、導光板２０の底面２３から出た光を再度導光板２０に反射させる。   The reflection plate 30 is provided facing the bottom surface 23 of the light guide plate 20. A series of parallel triangular triangular prisms 32, 32,... Are formed on the upper surface 31 of the reflecting plate 30 facing the bottom surface 23 of the light guide plate 20 at right angles to the prism protrusions 24 of the light guide plate 20. The light emitted from the bottom surface 23 of the light plate 20 is reflected again to the light guide plate 20.

導光板２０の底面２３に設けられた突起２５、２５、…では、図７、８、９に示すように、この実施形態において、底面２３に接したベース面２５４より２つの凸曲面例えば円曲面である反射面２５１、２５２が、底面２３上の第１の角２５６から頂点２５５を経て第２の角２５７に至る例えば円弧形をした稜線２５３で交り、両反射面２５１、２５２とベース面２５４とで交った辺２５４１、２５４１は、それぞれの頂点が互いに稜線２５３の両側で頂点２５５に対して両側（道側）へ片寄った非対称位置にある形状の曲線とする。ここで、本発明にかかる一実施形態によれば、稜線２５３の両側における反射面２５１、２５２の傾斜は、稜線２５３上を接点とした接線２５８、２５９がなす角度θが８５°〜１４０°の範囲内であるように形成されることが好ましい。なお、この実施形態においては、図６に示されているように、突起２５は、前記複数のプリズム突条２４と実質的に対応して整列され、好ましくは、導光板２０の光源４０に近い側から遠い側へ向うほど配列間隔を次第に短縮していくように設けられている。また、ベース面２５４は、非円形に形成されている。   In the projections 25, 25,... Provided on the bottom surface 23 of the light guide plate 20, in this embodiment, two convex curved surfaces such as a circular curved surface are formed from the base surface 254 in contact with the bottom surface 23, as shown in FIGS. The reflecting surfaces 251 and 252 intersect at a ridge line 253 having an arc shape, for example, from the first corner 256 on the bottom surface 23 through the vertex 255 to the second corner 257, and both the reflecting surfaces 251 and 252 and the base The sides 2541 and 2541 intersecting with the surface 254 are curves having shapes in which the vertices are asymmetrical positions that are offset from each other on both sides (the road side) with respect to the vertex 255 on both sides of the ridge line 253. Here, according to one embodiment of the present invention, the inclination of the reflection surfaces 251 and 252 on both sides of the ridge line 253 is such that the angle θ formed by the tangents 258 and 259 with the contact on the ridge line 253 is 85 ° to 140 °. It is preferable to be formed so as to be within the range. In this embodiment, as shown in FIG. 6, the protrusion 25 is aligned substantially corresponding to the plurality of prism protrusions 24, and preferably close to the light source 40 of the light guide plate 20. The arrangement interval is gradually shortened toward the far side from the side. Further, the base surface 254 is formed in a non-circular shape.

光源４０からの光は、図５に示されているように、導光板２０の端面２１から入射し、突起２５によって、導光板２０内の他端へ進むすべての反射ルートは散乱されるものとなる。ここで、突起２５の両反射面２５１、２５２は滑らかで、ある角度θ例えば８５°〜１４０°のいずれかに形成されているので、導光板２０のそれぞれの突起２５に至る光は、ほとんど反射面２５２によって上向きに反射され、導光板２０の上面２２から出ることができる。なお、実際、突起２５により上向きに反射された光線は、７０％以上との実験結果を得ている。また、導光板２０の光源４０に近い側から遠い側へ向うほど配列間隔を漸次短縮していくよう設けられている突起２５列によって、導光板２０の上面２２への反射光を均一にすることができる。したがって、本発明にかかる一実施形態のバックライトモジュールの照射品質向上に寄与することができる。   As shown in FIG. 5, the light from the light source 40 is incident from the end face 21 of the light guide plate 20, and all reflection routes traveling to the other end in the light guide plate 20 are scattered by the protrusions 25. Become. Here, since both reflection surfaces 251 and 252 of the protrusion 25 are smooth and are formed at a certain angle θ, for example, from 85 ° to 140 °, most of the light reaching the protrusions 25 of the light guide plate 20 is reflected. The light is reflected upward by the surface 252 and can exit from the upper surface 22 of the light guide plate 20. Actually, the experimental result of 70% or more of the light beam reflected upward by the protrusion 25 is obtained. Further, the reflected light to the upper surface 22 of the light guide plate 20 is made uniform by the projection 25 rows provided so that the arrangement interval is gradually shortened from the side closer to the light source 40 of the light guide plate 20 toward the far side. Can do. Therefore, it can contribute to the irradiation quality improvement of the backlight module of one Embodiment concerning this invention.

導光板２０の突起２５とプリズム突条２４によって、光は拡散板１０内を所期方向の図示しないＬＣＤパネル側へと一様に拡散されて進む。   Due to the protrusions 25 of the light guide plate 20 and the prism ridges 24, the light is uniformly diffused through the diffusion plate 10 toward the LCD panel side (not shown) in the intended direction.

導光板２０の底面２３で屈折され射出された光は、反射板３０のプリズム突条３２に到達したとき、プリズム突条３２によって導光板２０の方へ再反射され、導光板２０のプリズム突条２４から拡散板１０へ出る。したがって、反射板３０のプリズム突条３２と導光板２０のプリズム突条２４によって、光は拡散板１０内を所期方向の図示しないＬＣＤパネル側へ一様に拡散して進む。   The light refracted and emitted from the bottom surface 23 of the light guide plate 20 is re-reflected toward the light guide plate 20 by the prism protrusion 32 when reaching the prism protrusion 32 of the reflection plate 30, and the prism protrusion of the light guide plate 20. 24 exits to the diffusion plate 10. Therefore, the light is uniformly diffused through the diffusion plate 10 toward the LCD panel (not shown) in the desired direction by the prism protrusions 32 of the reflection plate 30 and the prism protrusions 24 of the light guide plate 20.

以上、本発明にかかる一実施形態のバックライトモジュールは、以下の利点がある。即ち、
（１） 本発明にかかる一実施形態のバックライトモジュールにおける導光板２０、反射板３０は、それぞれプリズム突条２４、プリズム突条３２が設けられたことにより、従来の装置と比べてより簡単でコンパクトな構造が得られるので、光の進路を簡単化することができ、且つ実質上光の散逸効果を低減することができる。 As described above, the backlight module according to the embodiment of the present invention has the following advantages. That is,
(1) The light guide plate 20 and the reflection plate 30 in the backlight module according to the embodiment of the present invention are simpler than the conventional device because the prism ridge 24 and the prism ridge 32 are provided, respectively. Since a compact structure can be obtained, the light path can be simplified, and the light dissipation effect can be substantially reduced.

（２） 突起２５の両反射面２５１、２５２は滑らかで、且つ両反射面２５１、２５２により交わる角度θが８５°〜１４０°の範囲内であるように形成されることにより、突起２５に到達した光は殆ど反射面２５２によって上向きに反射され導光板２０の上面２２から出ることができるので、光の利用効率を高くすることができる。   (2) The two reflecting surfaces 251 and 252 of the protrusion 25 are smooth and reach the protrusion 25 by being formed such that the angle θ intersected by both the reflecting surfaces 251 and 252 is within the range of 85 ° to 140 °. Since most of the reflected light is reflected upward by the reflection surface 252 and can be emitted from the upper surface 22 of the light guide plate 20, the light use efficiency can be increased.

（３） 突起２５は、導光板２０の光源４０に近い側から遠い側へ向うほど配列間隔を次第に短縮していくように設けられているので、導光板２０の上面２２への反射分布を均一化させることができる。したがって、本発明にかかる一実施形態のバックライトモジュールによれば、ＬＣＤパネルへの輝度が均一に拡散され、むらのない照明品質を向上させることができる。   (3) Since the protrusions 25 are provided so that the arrangement interval is gradually shortened from the side closer to the light source 40 of the light guide plate 20 to the side farther from the light source 40, the reflection distribution to the upper surface 22 of the light guide plate 20 is uniform. It can be made. Therefore, according to the backlight module of one embodiment of the present invention, the luminance to the LCD panel is uniformly diffused, and the illumination quality without unevenness can be improved.

（４） 光源４０からの光は、導光板２０の底面２３で屈折され射出されて反射板３０のプリズム突条３２に到達したとき、反射板３０のプリズム突条３２によって導光板２０内に再び反射され、導光板２０のプリズム突条２４によって拡散板１０へ出ることができるので、光を有効に利用することができ、輝度むらの少ないバックライトモジュールを実現できる。   (4) When the light from the light source 40 is refracted and emitted from the bottom surface 23 of the light guide plate 20 and reaches the prism ridge 32 of the reflection plate 30, the light again enters the light guide plate 20 by the prism ridge 32 of the reflection plate 30. Since the light is reflected and exits to the diffusion plate 10 by the prism protrusions 24 of the light guide plate 20, light can be used effectively and a backlight module with less luminance unevenness can be realized.

従来のバックライトモジュールの概略斜視図。The schematic perspective view of the conventional backlight module. 従来のバックライトモジュールの概略正面図。The schematic front view of the conventional backlight module. 従来の他のバックライトモジュールの概略斜視図。The schematic perspective view of the other conventional backlight module. 本発明にかかる一実施形態のバックライトモジュールの概略斜視図。The schematic perspective view of the backlight module of one Embodiment concerning this invention. 本発明にかかる一実施形態のバックライトモジュールの概略正面図。The schematic front view of the backlight module of one Embodiment concerning this invention. 本発明にかかる一実施形態のバックライトモジュールにおける導光板の底面図。The bottom view of the light-guide plate in the backlight module of one Embodiment concerning this invention. 本発明にかかる一実施形態の導光板に形成された突起の拡大斜視図。The expansion perspective view of the processus | protrusion formed in the light-guide plate of one Embodiment concerning this invention. 本発明にかかる一実施形態の突起の概略正面図。The schematic front view of the processus | protrusion of one Embodiment concerning this invention. 本発明にかかる一実施形態の突起の概略側面図。The schematic side view of the processus | protrusion of one Embodiment concerning this invention.

符号の説明Explanation of symbols

１０…拡散板、２０…導光板、２１…一端面、２２…上面、２３…底面、２４…プリズム突条、２５…突起、２５１，２５２…反射面、３０…反射板、３２…プリズム突条、４０…光源。   DESCRIPTION OF SYMBOLS 10 ... Diffusing plate, 20 ... Light guide plate, 21 ... One end surface, 22 ... Upper surface, 23 ... Bottom surface, 24 ... Prism protrusion, 25 ... Projection, 251, 252 ... Reflecting surface, 30 ... Reflecting plate, 32 ... Prism protrusion 40. Light source.

Claims (15)

光源と、
前記光源と平行に隣り合わせて設けられ、前記光源からの光が入射する一端面と、前記端面の一端に隣接した上面と、前記端面の他端に隣接し前記上面と背中合せの底面とを有し、前記上面に、前記端面に対して直角方向に沿って平行に並んだ複数の断面ほぼ三角山形のプリズム突条を形成し、前記底面に、前記端面と平行して前記底面より突出した突起が複数配列されている導光板と、
前記導光板の上面に面して設けられた拡散板と、
前記導光板の底面に面して設けられ、前記導光板の底面側の上面に、一連の平行な断面三角山形のプリズム突条が前記導光板のプリズム突条と直角に形成された反射板と、
を具備することを特徴とするバックライトモジュール。 A light source;
The light source is provided adjacent to and parallel to the light source, and has one end surface on which light from the light source is incident, an upper surface adjacent to one end of the end surface, and an upper surface and a back-to-back bottom surface adjacent to the other end of the end surface. A plurality of substantially triangular mountain-shaped prism ridges arranged parallel to the end face in a direction perpendicular to the end face, and a protrusion protruding from the bottom face in parallel with the end face on the bottom face. A plurality of light guide plates,
A diffusion plate provided facing the upper surface of the light guide plate;
A reflecting plate provided facing the bottom surface of the light guide plate, and having a series of parallel cross-sectional triangular mountain-shaped prism ridges formed at right angles to the prism ridges of the light guide plate on the bottom surface of the light guide plate; ,
A backlight module comprising: 前記複数突起は、前記導光板の複数のプリズム突条と実質的に対応して整列されていることを特徴とする請求項１に記載のバックライトモジュール。   The backlight module according to claim 1, wherein the plurality of protrusions are aligned substantially corresponding to the plurality of prism protrusions of the light guide plate. 前記複数突起は、前記導光板の前記光源に近い側から遠い側へ向うほど配列間隔を次第に短縮していくように設けられていることを特徴とする請求項１に記載のバックライトモジュール。   2. The backlight module according to claim 1, wherein the plurality of protrusions are provided so that an arrangement interval is gradually shortened toward a side farther from a side closer to the light source of the light guide plate. 前記突起は、それぞれ前記底面に接したベース面より２つの凸曲面をした反射面が、前記底面上の第１の角から頂点を経て第２の角に至る稜線で交るように形成されていることを特徴とする請求項１に記載のバックライトモジュール。   Each of the protrusions is formed such that a reflecting surface having two convex curved surfaces from a base surface in contact with the bottom surface intersects with a ridge line extending from the first corner to the second corner on the bottom surface. The backlight module according to claim 1. 前記稜線の両側における反射面の傾斜は、該稜線上を接点とした接線がなす角度が８５°〜１４０°の範囲内であるように形成されることを特徴とする請求項４に記載のバックライトモジュール。   5. The back according to claim 4, wherein the inclination of the reflection surface on both sides of the ridge line is formed such that an angle formed by a tangent line having the contact point on the ridge line is within a range of 85 ° to 140 °. Light module. 前記両反射面は、円曲面であることを特徴とする請求項４に記載のバックライトモジュール。   The backlight module according to claim 4, wherein the two reflecting surfaces are circular curved surfaces. 前記稜線は、円弧形を呈していることを特徴とする請求項４に記載のバックライトモジュール。   The backlight module according to claim 4, wherein the ridge line has an arc shape. 前記ベース面は、非円形に形成されていることを特徴とする請求項５に記載のバックライトモジュール。   The backlight module according to claim 5, wherein the base surface is formed in a non-circular shape. 前記ベース面の前記両反射面と交った辺が、それぞれの頂点が互いに前記稜線の両側で前記頂点に対して両側へ片寄った非対称位置にある形状の曲線に形成されていることを特徴とする請求項８に記載のバックライトモジュール。   The side of the base surface that intersects the two reflection surfaces is formed into a curve having a shape in which each vertex is at an asymmetrical position on both sides of the ridge line and is offset to both sides with respect to the vertex. The backlight module according to claim 8. 外部の光源からの光が入射する一端面と、
前記端面の一端に隣接した上面と、
前記端面の他端に隣接し前記上面と面した底面と、
前記底面に複数設けられ、前記底面に接したベース面より２つの凸曲面をした反射面が前記底面上の第１の角から頂点を経て第２の角に至る稜線で交る突起と、
を具備することを特徴とする導光板。 One end surface on which light from an external light source is incident;
An upper surface adjacent to one end of the end surface;
A bottom surface adjacent to the other end of the end surface and facing the top surface;
A plurality of protrusions that are provided on the bottom surface, and a reflection surface having two convex curved surfaces from a base surface in contact with the bottom surface intersects at a ridge line extending from the first corner to the second corner from the first corner on the bottom surface;
A light guide plate characterized by comprising: 前記稜線の両側における反射面の傾斜は、該稜線上を接点とした接線がなす角度が８５°〜１４０°の範囲内であるように形成されていることを特徴とする請求項１０に記載の導光板。   The inclination of the reflection surface on both sides of the ridge line is formed so that an angle formed by a tangent line with the ridge line as a contact point is within a range of 85 ° to 140 °. Light guide plate. 前記両反射面は、円曲面であることを特徴とする請求項１０に記載の導光板。   The light guide plate according to claim 10, wherein the two reflection surfaces are circular curved surfaces. 前記稜線は、円弧形を呈していることを特徴とする請求項１０に記載の導光板。   The light guide plate according to claim 10, wherein the ridge line has an arc shape. 前記ベース面は、非円形に形成されていることを特徴とする請求項１１に記載の導光板。   The light guide plate according to claim 11, wherein the base surface is formed in a non-circular shape. 前記ベース面の前記両反射面と交った辺が、それぞれの頂点が互いに前記稜線の両側で前記頂点に対して両側へ片寄った非対称位置にある形状の曲線に形成されていることを特徴とする請求項１４に記載の導光板。   The side of the base surface that intersects the two reflection surfaces is formed into a curve having a shape in which each vertex is at an asymmetrical position on both sides of the ridge line and is offset to both sides with respect to the vertex. The light guide plate according to claim 14.
JP2005008669A 2005-01-17 2005-01-17 Backlight module Pending JP2006196384A (en)

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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008024617A1 (en) * 2006-08-25 2008-02-28 3M Innovative Properties Company Backlight suitable for display devices
JP2008103110A (en) * 2006-10-17 2008-05-01 Nippon Leiz Co Ltd Light guide plate and flat lighting device
WO2008088134A1 (en) * 2007-01-17 2008-07-24 Cheil Industries Inc. Light guide panel comprising step structure for back light unit of tft-lcd
WO2008093929A1 (en) * 2007-01-29 2008-08-07 Cheil Industries Inc. Light guide panel for lcd comprising stripe prism of irregular shape and cross prism
WO2008111718A1 (en) * 2007-03-14 2008-09-18 Cheil Industries Inc. Light guide panel for liquid crystal display having light diffusion material and back light unit using thereof
KR101039322B1 (en) 2008-09-19 2011-06-08 태산엘시디 주식회사 Side light-emitting type back light unit
US7972052B2 (en) 2007-11-09 2011-07-05 Samsung Electronics Co., Ltd. Backlight unit
JP2012113891A (en) * 2010-11-22 2012-06-14 Mitsubishi Rayon Co Ltd Light guide body, surface light source device, and image display device
TWI393926B (en) * 2007-09-05 2013-04-21 Cheil Ind Inc Light guide panel for lcd back light unit and lcd back light unit thereby
WO2013121914A1 (en) * 2012-02-14 2013-08-22 凸版印刷株式会社 Lighting device and display device

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008024617A1 (en) * 2006-08-25 2008-02-28 3M Innovative Properties Company Backlight suitable for display devices
US7905650B2 (en) 2006-08-25 2011-03-15 3M Innovative Properties Company Backlight suitable for display devices
JP4511504B2 (en) * 2006-10-17 2010-07-28 日本ライツ株式会社 Light guide plate and flat illumination device
JP2008103110A (en) * 2006-10-17 2008-05-01 Nippon Leiz Co Ltd Light guide plate and flat lighting device
WO2008088134A1 (en) * 2007-01-17 2008-07-24 Cheil Industries Inc. Light guide panel comprising step structure for back light unit of tft-lcd
WO2008093929A1 (en) * 2007-01-29 2008-08-07 Cheil Industries Inc. Light guide panel for lcd comprising stripe prism of irregular shape and cross prism
WO2008111718A1 (en) * 2007-03-14 2008-09-18 Cheil Industries Inc. Light guide panel for liquid crystal display having light diffusion material and back light unit using thereof
TWI393926B (en) * 2007-09-05 2013-04-21 Cheil Ind Inc Light guide panel for lcd back light unit and lcd back light unit thereby
US8605233B2 (en) 2007-09-05 2013-12-10 Cheil Industries, Inc. Light guide panel for LCD back light unit and LCD back light unit thereby
US7972052B2 (en) 2007-11-09 2011-07-05 Samsung Electronics Co., Ltd. Backlight unit
KR101039322B1 (en) 2008-09-19 2011-06-08 태산엘시디 주식회사 Side light-emitting type back light unit
JP2012113891A (en) * 2010-11-22 2012-06-14 Mitsubishi Rayon Co Ltd Light guide body, surface light source device, and image display device
WO2013121914A1 (en) * 2012-02-14 2013-08-22 凸版印刷株式会社 Lighting device and display device
US9354378B2 (en) 2012-02-14 2016-05-31 Toppan Printing Co., Ltd. Illuminating device and display

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