JP2009081083A - Backlight device - Google Patents

Backlight device Download PDF

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JP2009081083A
JP2009081083A JP2007250437A JP2007250437A JP2009081083A JP 2009081083 A JP2009081083 A JP 2009081083A JP 2007250437 A JP2007250437 A JP 2007250437A JP 2007250437 A JP2007250437 A JP 2007250437A JP 2009081083 A JP2009081083 A JP 2009081083A
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light
emitting surface
light emitting
backlight device
led
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Mamoru Kawasaki
守 川崎
Yusuke Abe
祐介 阿部
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NEC Embedded Products Ltd
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NEC Embedded Products Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a backlight device utilizing LEDs in which luminance distribution in a light-emitting surface of the backlight device is uniformalized. <P>SOLUTION: The backlight device has at least two point light sources arranged on one end face side crossing nearly at right angles to the light-emitting surface, and the point light source arranged at a position near the light-emitting surface of the one end face has an LED arranged having relatively high brightness in irradiation light compared with the point light source arranged at a position far from the light-emitting surface of the one end face. Thereby, luminance unevenness of the light-emitting surface can be eliminated while avoiding to be an obstacle in realizing thinness of the frame portion of a liquid crystal display panel. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

本発明は、液晶表示装置等に利用されるＬＥＤ等の点光源を用いたバックライト装置に関する。   The present invention relates to a backlight device using a point light source such as an LED used for a liquid crystal display device or the like.

従来、液晶表示装置等に利用されるバックライト装置には、導光板の側面に光源を配置するサイドライト型のバックライト装置がある。前記バックライト装置の光源には、冷陰極管やＬＥＤが用いられているが、近年ではＬＥＤの方が冷陰極管に比較して長寿命でかつ消費電力が少ないため、ＬＥＤを用いたものが主流になりつつある。   2. Description of the Related Art Conventionally, backlight devices used for liquid crystal display devices and the like include a sidelight type backlight device in which a light source is disposed on a side surface of a light guide plate. As a light source of the backlight device, a cold cathode tube or an LED is used. However, in recent years, an LED uses an LED because it has a longer life and consumes less power than a cold cathode tube. It is becoming mainstream.

しかしながら、ＬＥＤは点光源であり光の指向性が強いので、バックライト装置に用いるには、バックライト発光面の全体を照射するために、複数のＬＥＤを入射側面に配列する必要がある。結果として、それぞれのＬＥＤの間に輝度の差が生じたり、ＬＥＤと反射面との距離の違いによる輝度の差が生じたりして、導光板の発光面全体の輝度分布が不均一となる問題があった。   However, since the LED is a point light source and has high directivity of light, in order to use the backlight device, it is necessary to arrange a plurality of LEDs on the incident side surface in order to irradiate the entire backlight emission surface. As a result, a difference in luminance occurs between the LEDs, or a difference in luminance due to a difference in distance between the LED and the reflecting surface occurs, resulting in a non-uniform luminance distribution on the entire light emitting surface of the light guide plate. was there.

これに対して、ＬＥＤと導光板入射側面との間に、対向する反射面を備えたＬＥＤ光を拡散させるための空間を設けることで、導光板の発光面全体の輝度分布を均一にさせようという提案がされている（例えば、特許文献１）。図３に示す特許文献１のバックライト装置では、ＬＥＤ３が実装される基板４と入光面２ａは、下部反射板７と上部反射板８で覆われる所定の間隔Ｑを空けて、配置されている。   On the other hand, by providing a space for diffusing LED light having an opposing reflecting surface between the LED and the light guide plate incident side surface, the luminance distribution of the entire light emitting surface of the light guide plate will be made uniform. (For example, Patent Document 1). In the backlight device of Patent Document 1 shown in FIG. 3, the substrate 4 on which the LED 3 is mounted and the light incident surface 2 a are arranged with a predetermined interval Q covered by the lower reflector 7 and the upper reflector 8. Yes.

特開２００７−１２８７４８号公報JP 2007-128748 A

しかしながら、特許文献１記載の技術では、発光面における輝度分布をある程度均一化はできるが、発光面を構成する導光板の入光面２ａと基板４との間に間隔Ｑを取った空間を設ける必要があるため、バックライト装置の発光面側の一端が寸法的におおよそＱだけ大きくなると言う問題があった。これは、この種のサイドライト型のバックライト装置を利用する液晶表示装置の設計の際に、少なくともフレーム部分の一端を大きく取らなければならなくなり、液晶表示装置のフレームを極力薄くし、表示エリアのみを際立たせるようなデザインを実現する上でデメリットとなっていた。   However, in the technique described in Patent Document 1, the luminance distribution on the light emitting surface can be made uniform to some extent, but a space with a space Q is provided between the light incident surface 2a of the light guide plate constituting the light emitting surface and the substrate 4. Since it is necessary, there is a problem that one end of the light emitting surface side of the backlight device is increased in size by approximately Q. This is because when designing a liquid crystal display device using this type of side-light type backlight device, at least one end of the frame portion must be made large, and the frame of the liquid crystal display device is made as thin as possible. It was a demerit in realizing a design that would only stand out.

本発明はこのような事情に鑑みてなされたものであり、バックライト装置の発光面側の一端の寸法の拡大を極力回避して、発光面における輝度分布を均一化したＬＥＤを利用したバックライト装置を提供することを目的とする。   The present invention has been made in view of such circumstances, and a backlight using an LED in which the luminance distribution on the light emitting surface is uniformed while avoiding the enlargement of the size of one end on the light emitting surface side of the backlight device as much as possible. An object is to provide an apparatus.

本発明の第１のサイドライト型バックライト装置は、発光面にほぼ直交する一端面側に配置された少なくとも二つの点光源を有するもので、前記一端面に近い側の前記発光面を発光させるための点光源は、前記一端面に遠い側の前記発光面を発光させるための点光源に比較して、相対的に照射光の明るさが低いことを特徴とする。   The first sidelight type backlight device of the present invention has at least two point light sources arranged on one end surface side substantially orthogonal to the light emitting surface, and causes the light emitting surface on the side close to the one end surface to emit light. The point light source is characterized in that the brightness of the irradiated light is relatively low as compared with the point light source for causing the light emitting surface far from the one end surface to emit light.

本発明の第２のサイドライト型バックライト装置は、発光面にほぼ直交する一端面側に配置された少なくとも二つの点光源を有するもので、前記一端面の前記発光面に近い位置に配置する点光源は、前記一端面の前記発光面に遠い位置に配置する点光源に比較して、相対的に照射光の明るさが高いことを特徴とする。   The second sidelight type backlight device of the present invention has at least two point light sources arranged on one end surface side substantially orthogonal to the light emitting surface, and is arranged at a position near the light emitting surface on the one end surface. The point light source is characterized in that the brightness of the irradiated light is relatively higher than a point light source disposed at a position far from the light emitting surface of the one end surface.

本発明の第３のサイドライト型バックライト装置は、上面に発光面、前記発光面にほぼ直交する側端面に入光面、および前記発光面に対向する下面に反射面を有する導光板の前記入光面側に輝度差のある少なくとも二つの点光源を前記側端面の矩形の短辺方向に直列的に配置し、前記矩形の長辺方向に前記直列的に配置した前記少なくとも二つの点光源を、さらに所定の間隔で複数組配置したものであって、前記輝度差のある少なくとも二つの点光源は、配置箇所が反射面側近傍から発光面近傍に移るに従い、点光源の輝度が相対的に大きくなるように配置されることを特徴とする。   A third sidelight type backlight device according to the present invention is provided in front of a light guide plate having a light emitting surface on an upper surface, a light incident surface on a side end surface substantially orthogonal to the light emitting surface, and a reflecting surface on a lower surface facing the light emitting surface. At least two point light sources having a luminance difference on the writing light surface side are arranged in series in the short side direction of the rectangle of the side end surface, and the at least two point light sources arranged in series in the long side direction of the rectangle Further, at least two point light sources having a difference in luminance are arranged such that the luminance of the point light source is relatively increased as the arrangement location moves from the vicinity of the reflecting surface to the vicinity of the light emitting surface. It arrange | positions so that it may become large.

本発明によれば、バックライト装置の発光面側の一端の寸法の拡大を極力回避して、発光面における輝度分布を均一化したＬＥＤを利用したバックライト装置を提供することができる。   ADVANTAGE OF THE INVENTION According to this invention, the enlargement of the dimension of the one end by the side of the light emission surface of a backlight apparatus can be avoided as much as possible, and the backlight apparatus using LED which equalized the luminance distribution in the light emission surface can be provided.

以下、図面を参照して本発明を実施するための最良の形態について詳細に説明する。なお、以下の説明では、点光源にＬＥＤを用いたＬＥＤバックライト装置に対して本発明を適用した場合を例示して説明する。図１は、本発明の一実施形態に係るＬＥＤバックライト装置の構造とＬＥＤからの照射光の反射および拡散経路の概要を示す断面図である。図２は、本発明の実施例との違いを対比して説明するための従来例である。   The best mode for carrying out the present invention will be described below in detail with reference to the drawings. In the following description, a case where the present invention is applied to an LED backlight device using LEDs as point light sources will be described as an example. FIG. 1 is a cross-sectional view showing an outline of a structure of an LED backlight device according to an embodiment of the present invention, and reflection and diffusion paths of irradiation light from the LED. FIG. 2 is a conventional example for explaining the difference from the embodiment of the present invention.

まず、図２の従来のＬＥＤバックライト装置２を詳説する。ＬＥＤバックライト装置２は、ＬＥＤ２１が実装された基板２２が導光板２３の横方向に装着されており、ＬＥＤ２１から照射される光を導光板内に取り込んでいる。導光板２３は上面の発光面に対して下面の反射面が斜めとなっており、反射面には反射板２４を有している。また、発光面には拡散板２５を有している。ＬＥＤ２１より導光板２３に取り込まれた光２１ａは反射板２４に反射し、屈折してＬＥＤ２１の入光面２６からそれぞれ近い場所２１Ｚ、中程度離れた場所２１Ｙ、遠い場所２１Ｘで発光面に入光され、拡散板２５により、発光面全体を発光させる。   First, the conventional LED backlight device 2 of FIG. 2 will be described in detail. In the LED backlight device 2, the substrate 22 on which the LEDs 21 are mounted is mounted in the lateral direction of the light guide plate 23, and the light emitted from the LEDs 21 is taken into the light guide plate. The light guide plate 23 has a reflective surface on the lower surface that is inclined with respect to the light emitting surface on the upper surface, and has a reflective plate 24 on the reflective surface. The light emitting surface has a diffusion plate 25. The light 21a taken into the light guide plate 23 from the LED 21 is reflected by the reflecting plate 24, refracted, and is incident on the light emitting surface at a location 21Z that is near, a location 21Y that is intermediate, and a location 21X that is far from the light entrance surface 26 of the LED 21. Then, the entire light emitting surface is caused to emit light by the diffusion plate 25.

従来のＬＥＤバックライト装置２の場合、ＬＥＤ２１の輝度は一定であるため、入光面から近い場所２１Ｚ、中程度離れた場所２１Ｙ、遠い場所２１Ｘでは光の伝達の距離の違いから、光の減衰が生じ、発光面における輝度ムラの原因となっていた。また、近い場所２１Ｙよりさらに近い入光面の近傍は、反射板２４によるＬＥＤ２１の光２１ａの反射が少ないため、暗部が生じる問題があった。   In the case of the conventional LED backlight device 2, since the brightness of the LED 21 is constant, the light attenuation is caused by the difference in the light transmission distance between the place 21Z near the light incident surface, the place 21Y far away from the light incident surface, and the place 21X far away. Has occurred, causing uneven brightness on the light emitting surface. Further, in the vicinity of the light incident surface that is closer to the near place 21Y, there is a problem that a dark portion is generated because the reflection of the light 21a of the LED 21 by the reflection plate 24 is small.

前述の従来のバックライト装置２と対比しながら、図１を参照し、本発明のバックライト装置の構成を説明する。図1のＬＥＤバックライト装置１は輝度の一番高いＬＥＤ１１、中間の輝度のＬＥＤ１２、輝度の一番低いＬＥＤ１３の３個のＬＥＤが縦に発光面から近い側から順に実装された基板１４が導光板１５の横方向に装着されており、３個のＬＥＤから照射される光を導光板内に取り込んでいる。導光板１５は従来のＬＥＤバックライト装置２と同様に、上面の発光面に対して下面の反射面が斜めとなっており、反射面には反射板１６を有している。また、発光面には拡散板１７を有している。   The configuration of the backlight device of the present invention will be described with reference to FIG. 1 while comparing with the conventional backlight device 2 described above. The LED backlight device 1 shown in FIG. 1 has a substrate 14 on which three LEDs, the LED 11 having the highest luminance, the LED 12 having the intermediate luminance, and the LED 13 having the lowest luminance, are mounted in this order from the side closer to the light emitting surface. It is mounted in the lateral direction of the light plate 15 and takes light emitted from the three LEDs into the light guide plate. Similar to the conventional LED backlight device 2, the light guide plate 15 has a reflective surface on the lower surface that is inclined with respect to the light emitting surface on the upper surface, and has a reflective plate 16 on the reflective surface. In addition, a diffusion plate 17 is provided on the light emitting surface.

輝度の一番高いＬＥＤ１１より導光板１５に取り込まれた光１１ａは、入光面１８から遠い場所で反射板１６に反射し、屈折して入光面１８から遠い場所１１Ｘで発光面に入光される。また、中間の輝度のＬＥＤ１２より導光板１５に取り込まれた光１２ｂは入光面１８から中程度離れた場所で反射板１６に反射し、屈折して入光面１８から中程度離れた場所１２Ｙで発光面に入光される。さらに、輝度の一番低いＬＥＤ１３より導光板１５に取り込まれた光１３ｃは入光面から近い場所で反射板１６に反射し、屈折して入光面の近い場所１３Ｚで発光面に入光される。発光面に入光されたそれぞれのＬＥＤの光は、その発光面に有している拡散板１７により発光面全体を発光させる。   The light 11 a taken into the light guide plate 15 from the LED 11 having the highest luminance is reflected by the reflecting plate 16 at a location far from the light incident surface 18, and refracted to enter the light emitting surface at a location 11 X far from the light incident surface 18. Is done. Further, the light 12b taken into the light guide plate 15 from the intermediate luminance LED 12 is reflected by the reflecting plate 16 at a location that is moderately separated from the light incident surface 18, and is refracted to a location 12Y that is moderately separated from the light incident surface 18. Is incident on the light emitting surface. Further, the light 13c taken into the light guide plate 15 from the LED 13 having the lowest luminance is reflected by the reflecting plate 16 at a location close to the light incident surface, refracted and incident on the light emitting surface at a location 13Z near the light incident surface. The The light of each LED incident on the light emitting surface causes the entire light emitting surface to emit light by the diffusion plate 17 provided on the light emitting surface.

ＬＥＤ１１、ＬＥＤ１２、ＬＥＤ１３は、それぞれが主に受け持つ入光面から遠い場所１１Ｘ、中程度離れた場所１２Ｙ、近い場所１３Ｚを照射する際の光の伝達距離の違いによる光の減衰を考慮して、最適に輝度調整することで、あるいは輝度の異なるＬＥＤを選択的に最適配置することで、発光面における輝度を均一にすることが可能となる。また、特許文献１に示される入光面近傍の発光面の暗部も、複数個のＬＥＤを配置することで、前記暗部に該当する部分の照射を受け持つＬＥＤ１３から照射される光を特許文献1と比較し相対的に入光面１８の近い場所で反射板１６に反射し、屈折して照射させることが可能になるので、解消できる。   LED11, LED12, LED13, considering the attenuation of light due to the difference in the transmission distance of light when irradiating the place 11X far from the light incident surface that each mainly handles, the place 12Y that is moderately separated, and the near place 13Z, It is possible to make the luminance on the light emitting surface uniform by adjusting the luminance optimally or by selectively optimally arranging LEDs having different luminances. Moreover, the dark part of the light-emitting surface near the light incident surface shown in Patent Document 1 also arranges a plurality of LEDs so that light emitted from the LED 13 responsible for irradiation of the part corresponding to the dark part is referred to as Patent Document 1. In comparison, it can be reflected on the reflecting plate 16 at a location relatively close to the light incident surface 18, and can be refracted to be eliminated.

なお、本発明の一実施形態に係るＬＥＤバックライト装置は、３個の輝度の異なるＬＥＤを縦配置した構成例としているが、少なくとも２個のＬＥＤ構成としても良いし、ＬＥＤ輝度の違いは同一のＬＥＤを使用して、ＬＥＤの点灯をＯＮ／ＯＦＦできるパルス回路（不図示）を用いて点灯時間を制御することで各ＬＥＤの輝度調整を行うようにしても良い。   Note that the LED backlight device according to an embodiment of the present invention has a configuration example in which three LEDs having different luminances are arranged vertically, but may have at least two LED configurations, and the difference in LED luminances is the same. The brightness of each LED may be adjusted by controlling the lighting time using a pulse circuit (not shown) that can turn on / off the LED.

また、発光面の大きさ、利用するＬＥＤの輝度、発光面が要求する明るさに応じ、ＬＥＤを所定のピッチで複数個横方向に配置することは、液晶ディスプレイに用いられるバックライト装置では当然のことなので、詳説は省く。   In addition, it is natural that a plurality of LEDs are arranged in a horizontal direction at a predetermined pitch according to the size of the light emitting surface, the brightness of the LED to be used, and the brightness required by the light emitting surface. Therefore, I will omit the detailed explanation.

この場合は、入光面を矩形とした場合、短辺方向に輝度の異なるＬＥＤを複数個配置し、長辺方向にこの複数個配置したＬＥＤの組を所定のピッチでさらに複数組配置した基板が基板１４となる。   In this case, when the light incident surface is rectangular, a plurality of LEDs having different luminances are arranged in the short side direction, and a plurality of sets of LEDs arranged in the long side direction are arranged at a predetermined pitch. Becomes the substrate 14.

このようなバックライト装置を実施することにより、バックライト装置の発光面側の一端の寸法の拡大を極力回避して、発光面における輝度分布を均一化したＬＥＤを利用したバックライト装置を提供することができる。   By implementing such a backlight device, there is provided a backlight device using LEDs in which the luminance distribution on the light emitting surface is made uniform while avoiding the enlargement of the size of one end on the light emitting surface side of the backlight device as much as possible. be able to.

本発明の実施の形態のＬＥＤバックライト装置の構造とＬＥＤからの照射光の反射および拡散経路の概要を示す断面図である。It is sectional drawing which shows the outline | summary of the structure of the LED backlight apparatus of embodiment of this invention, reflection of the irradiation light from LED, and a diffusion path | route. 従来のＬＥＤバックライト装置の構造とＬＥＤからの照射光の反射および拡散経路の概要を示す断面図である。It is sectional drawing which shows the outline | summary of the structure of the conventional LED backlight apparatus, the reflection of an irradiation light from LED, and a diffusion path | route. 特許文献１に示される従来のＬＥＤバックライト装置の構造を示す断面図である。It is sectional drawing which shows the structure of the conventional LED backlight apparatus shown by patent document 1. FIG.

符号の説明Explanation of symbols

１ ＬＥＤバックライト装置
１１ 輝度の一番高いＬＥＤ
１２ 中間の輝度のＬＥＤ
１３ 輝度の一番低いＬＥＤ
１４ 基板
１５ 導光板
１６ 反射板
１７ 拡散板
１８ 入光面

1 LED backlight device 11 LED with highest brightness
12 Medium brightness LED
13 LED with the lowest brightness
14 Substrate 15 Light guide plate 16 Reflector plate 17 Diffuser plate Light incident surface

Claims (3)

発光面にほぼ直交する一端面側に配置された少なくとも二つの点光源を有するバックライト装置において、
前記一端面に近い側の前記発光面を発光させるための点光源は、前記一端面に遠い側の前記発光面を発光させるための点光源に比較して、相対的に照射光の明るさが低いことを特徴とするサイドライト型バックライト装置。 In a backlight device having at least two point light sources arranged on one end surface side substantially orthogonal to the light emitting surface,
The point light source for causing the light emitting surface near the one end surface to emit light is relatively brighter than the point light source for emitting the light emitting surface far from the one end surface. Sidelight type backlight device characterized by being low. 発光面にほぼ直交する一端面側に配置された少なくとも二つの点光源を有するバックライト装置において、
前記一端面の前記発光面に近い位置に配置する点光源は、前記一端面の前記発光面に遠い位置に配置する点光源に比較して、相対的に照射光の明るさが高いことを特徴とするサイドライト型バックライト装置。 In a backlight device having at least two point light sources arranged on one end surface side substantially orthogonal to the light emitting surface,
The point light source arranged at a position near the light emitting surface of the one end face is relatively brighter than the point light source arranged at a position far from the light emitting face of the one end face. Sidelight type backlight device. 上面に発光面、前記発光面にほぼ直交する側端面に入光面、および前記発光面に対向する下面に反射面を有する導光板の前記入光面側に輝度差のある少なくとも二つの点光源を前記側端面の矩形の短辺方向に直列的に配置し、前記矩形の長辺方向に前記直列的に配置した前記少なくとも二つの点光源を、さらに所定の間隔で複数組配置したバックライト装置であって、
前記輝度差のある少なくとも二つの点光源は、配置箇所が反射面側近傍から発光面近傍に移るに従い、点光源の輝度が相対的に大きくなるように配置されることを特徴とするサイドライト型バックライト装置。































At least two point light sources having a luminance difference on the light incident surface side of the light guide plate having a light emitting surface on the upper surface, a light incident surface on a side end surface substantially orthogonal to the light emitting surface, and a reflective surface on the lower surface facing the light emitting surface Are arranged in series in the short side direction of the rectangle of the side end face, and a plurality of sets of the at least two point light sources arranged in series in the long side direction of the rectangle are arranged at a predetermined interval. Because
The at least two point light sources having a difference in luminance are arranged such that the luminance of the point light source is relatively increased as the arrangement location moves from the vicinity of the reflecting surface side to the vicinity of the light emitting surface. Backlight device.































JP2007250437A 2007-09-27 2007-09-27 Backlight device Pending JP2009081083A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012133082A1 (en) * 2011-03-29 2012-10-04 富士フイルム株式会社 Inkjet recording device and image forming method
JP2013154508A (en) * 2012-01-27 2013-08-15 Fujifilm Corp Image forming apparatus and image forming method

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002270020A (en) * 2001-03-08 2002-09-20 Casio Comput Co Ltd Light source device
JP2003114414A (en) * 2001-10-05 2003-04-18 Fujitsu Ltd Liquid crystal display device to be used in electronic equipment
JP2006156194A (en) * 2004-11-30 2006-06-15 Optrex Corp Illumination device

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002270020A (en) * 2001-03-08 2002-09-20 Casio Comput Co Ltd Light source device
JP2003114414A (en) * 2001-10-05 2003-04-18 Fujitsu Ltd Liquid crystal display device to be used in electronic equipment
JP2006156194A (en) * 2004-11-30 2006-06-15 Optrex Corp Illumination device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012133082A1 (en) * 2011-03-29 2012-10-04 富士フイルム株式会社 Inkjet recording device and image forming method
US8851609B2 (en) 2011-03-29 2014-10-07 Fujifilm Corporation Inkjet recording apparatus
JP2013154508A (en) * 2012-01-27 2013-08-15 Fujifilm Corp Image forming apparatus and image forming method

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