JP2013030433A - Led board, lighting apparatus and display device - Google Patents

Led board, lighting apparatus and display device Download PDF

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JP2013030433A
JP2013030433A JP2011167390A JP2011167390A JP2013030433A JP 2013030433 A JP2013030433 A JP 2013030433A JP 2011167390 A JP2011167390 A JP 2011167390A JP 2011167390 A JP2011167390 A JP 2011167390A JP 2013030433 A JP2013030433 A JP 2013030433A
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led
adjacent
leds
harness
power supply
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JP5738709B2 (en
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Tetsutsugu Ito
哲嗣 伊藤
Hirotoshi Iemura
浩俊 家村
Tomohiko Okada
知彦 岡田
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Sharp Corp
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Abstract

PROBLEM TO BE SOLVED: To provide an LED board that can install LEDs up to end parts of the board and can prevent slackening of waveforms of an applied voltage to the LEDs by shortening the harness length, and enhance freedom of arrangement of a heat radiation member or the like.SOLUTION: The LED board 1 has a prescribed number of LEDs 11 mounted in a lattice form. When two sheets of the LED boards 1 are arranged in an adjoined state along a neighboring direction, a connector 13 to which a harness for power supply connection is connected is arranged at a mutually opposed adjacent side end part 12 in each LED board 1. Two harnesses are connected to each connector 13 of the two sheets of LED boards 1 at the middle part of the two sheets of the LED boards 1.

Description

この発明は、複数のＬＥＤを実装するＬＥＤ基板に関し、特に、バックライトとして使用される照明装置を構成するＬＥＤ基板、これを備えた照明装置及びディプレイ装置に関する。   The present invention relates to an LED substrate on which a plurality of LEDs are mounted, and more particularly to an LED substrate that constitutes an illumination device used as a backlight, and an illumination device and a display device including the LED substrate.

ディスプレイ装置のバックライトとして用いられる照明装置には、複数のＬＥＤを備えたものがある。照明装置は、それぞれが所定数のＬＥＤを実装した単一又は複数の基板を照明範囲の大きさに応じた枚数だけ、平板状の配置している（例えば、特許文献１参照。）。   Some illuminating devices used as a backlight of a display device include a plurality of LEDs. In the lighting device, a single or a plurality of substrates each mounted with a predetermined number of LEDs are arranged in a flat plate shape by the number corresponding to the size of the illumination range (see, for example, Patent Document 1).

各基板は、矩形を呈し、所定数のＬＥＤが直線状又は格子状に実装され、端部にコネクタを備えている。単一の基板の面積に比較して照明範囲が広い場合には、複数の基板がそれぞれの端部を近接させた状態でフレームに固定される。各ＬＥＤには、照明範囲の互いに平行な２側面の間で、コネクタの接続方向に沿って電源部から電圧が印加される。   Each substrate has a rectangular shape, a predetermined number of LEDs are mounted in a straight line shape or a lattice shape, and a connector is provided at the end. When the illumination range is wide compared to the area of a single substrate, the plurality of substrates are fixed to the frame with their end portions close to each other. A voltage is applied to each LED from the power supply unit along the connection direction of the connector between two parallel sides of the illumination range.

特開２００８−８４６３１号公報JP 2008-84631 A

しかし、従来の照明装置では、コネクタで接続された複数の基板における隣接方向の両端部に電源部との間のハーネスを接続している。このため、照明装置の両端部にはＬＥＤを配置することが出来ず、ディスプレイ装置の表示を端部まで設けることが出来ないため額縁の幅が広くなり、このディスプレイを用いてマルチディスプレイを構成した場合、ディスプレイ間に画像が表示されない領域が多く存在してしまう。また、電源部と基板との間のハーネス長が長くなり、ＬＥＤに対する印加電圧の波形に鈍りを生じる問題がある。また、照明装置では、ＬＥＤの発熱による電子部品の誤作動や劣化を防止するためにダクト等の放熱部材を配置する必要があるが、長いハーネスによって照明装置内における放熱部材の配置スペースの自由度が低下する。   However, in the conventional illuminating device, the harness between the power supply unit is connected to both ends in the adjacent direction in the plurality of substrates connected by the connector. For this reason, LEDs cannot be arranged at both ends of the lighting device, and display of the display device cannot be provided up to the end, so the width of the frame is widened, and a multi-display is configured using this display. In this case, there are many areas where no image is displayed between the displays. Moreover, the harness length between a power supply part and a board | substrate becomes long, and there exists a problem which produces the dullness in the waveform of the applied voltage with respect to LED. Further, in the lighting device, it is necessary to arrange a heat radiating member such as a duct in order to prevent malfunction or deterioration of the electronic component due to the heat generated by the LED. However, the freedom of the arrangement space of the heat radiating member in the lighting device by a long harness Decreases.

この発明の目的は、隣接する基板における互いに対向する端部で電源部との間の電気的接続を行うことで、基板設置時に外側にあたる端部までＬＥＤを配置することができ、照明範囲を広くすることができることからディスプレイ装置の端部まで表示を設けることができ、また、ハーネス長を短縮することができ、ＬＥＤに対する印加電圧の波形の鈍りを防止できるとともに、放熱部材等の配置の自由度を高めることができるＬＥＤ基板、照明装置及びディスプレイ装置を提供することにある。   The object of the present invention is to perform electrical connection between the power supply units at the opposite ends of the adjacent substrates, so that the LEDs can be arranged up to the outer end when the substrate is installed, and the illumination range is widened. Since the display can be provided up to the end of the display device, the harness length can be shortened, the waveform of the voltage applied to the LED can be prevented from being blunted, and the degree of freedom of arrangement of the heat radiating members, etc. It is providing the LED board | substrate, the illuminating device, and the display apparatus which can raise LED.

この発明のＬＥＤ基板は、所定数のＬＥＤを実装し、互いに対向する隣接側端部を近接させて２枚が隣接した状態で配置されるＬＥＤ基板であって、電源接続用のハーネスが接続されるコネクタを隣接側端部に配置している。   The LED board according to the present invention is an LED board in which a predetermined number of LEDs are mounted, and two adjacent boards are arranged adjacent to each other with adjacent end portions facing each other, to which a harness for power connection is connected. The connector is arranged at the end on the adjacent side.

この構成によれば、隣接して配置される２枚のＬＥＤ基板のそれぞれの隣接側端部に配置されたコネクタに、電源部からの電源接続用のハーネスが接続される。ＬＥＤ基板設置時の外側端部までＬＥＤを設置でき、表示範囲を広くすることができる。電源部とコネクタとの間の距離が短縮され、ハーネス長が短縮される。   According to this configuration, the power supply harness from the power supply unit is connected to the connectors disposed at the adjacent end portions of the two LED substrates disposed adjacent to each other. LEDs can be installed up to the outer edge when the LED board is installed, and the display range can be widened. The distance between the power supply unit and the connector is shortened, and the harness length is shortened.

また、接合用端部は、隣接方向に直交する方向の中心点について回転対称となる凹凸形状を呈することが好ましい。第１のＬＥＤ基板の接合用端部の凸部が第２のＬＥＤ基板の接合用端部の凹部に嵌入し、２つのＬＥＤ基板を十分に接近させて隣接させることができる。隣接する２枚のＬＥＤ基板のそれぞれの最も接合用端部側のＬＥＤの間隔を、単一のＬＥＤ基板におけるＬＥＤ間隔に容易に一致させることができる。   Moreover, it is preferable that the joining end portion has an uneven shape that is rotationally symmetric with respect to a center point in a direction orthogonal to the adjacent direction. The convex portion of the joining end portion of the first LED substrate is fitted into the concave portion of the joining end portion of the second LED substrate, and the two LED substrates can be brought close enough to be adjacent to each other. The distance between the LEDs on the most bonding end side of each of the two adjacent LED boards can be easily matched with the LED distance on a single LED board.

この発明によれば、ＬＥＤ基板設置時の外側端部までＬＥＤを設置でき、バックライト装置として端部まで照射する事ができるので表示範囲を広め狭額縁化することができ、また、電源接続用のハーネス長を短縮することができ、ＬＥＤに対する印加電圧の波形の鈍りを防止できるとともに、放熱部材等の配置の自由度を高めることができる。   According to the present invention, the LED can be installed up to the outer end when the LED board is installed, and can be irradiated to the end as a backlight device, so the display range can be widened and the frame can be narrowed. The harness length can be shortened, the waveform of the voltage applied to the LED can be prevented from being blunted, and the degree of freedom in arranging the heat dissipating member and the like can be increased.

本発明の実施形態に係るＬＥＤ基板を適用した照明装置を備えたディスプレイ装置の組立図である。It is an assembly drawing of the display apparatus provided with the illuminating device to which the LED board which concerns on embodiment of this invention is applied. 同ＬＥＤ基板の要部の正面図である。It is a front view of the principal part of the LED board. 同ＬＥＤ基板の使用状態を示す要部の正面図である。It is a front view of the principal part which shows the use condition of the LED board. 同ＬＥＤ基板が取り付けられる照明装置の要部の断面図である。It is sectional drawing of the principal part of the illuminating device to which the LED board is attached.

以下に、この発明の実施形態に係るＬＥＤ基板及び照明装置を、ディスプレイ装置のバックライトとして使用した場合について図面を参照しつつ詳細に説明する。   Hereinafter, a case where an LED substrate and a lighting device according to an embodiment of the present invention are used as a backlight of a display device will be described in detail with reference to the drawings.

図１に示すように、この発明の実施形態に係るＬＥＤ基板１は、一例としてディスプレイ装置１００のバックライト２０に備えられる。ディスプレイ装置１００は、フレーム１１０、液晶パネル１２０、バックライト２０を積層して構成されている。   As shown in FIG. 1, an LED substrate 1 according to an embodiment of the present invention is provided in a backlight 20 of a display device 100 as an example. The display device 100 is configured by laminating a frame 110, a liquid crystal panel 120, and a backlight 20.

この発明の照明装置であるバックライト２０は、背面フレーム２１、ＬＥＤ基板１、拡散板２２を積層して構成されている。   A backlight 20 that is an illuminating device of the present invention is configured by laminating a back frame 21, an LED substrate 1, and a diffusion plate 22.

背面フレーム２１は、平板状を呈し、前面に一例として４枚のＬＥＤ基板１が固定されるとともに、裏面に図示しない電源部等を備えている。４枚のＬＥＤ基板１は、背面フレーム２１の前面に上下及び左右に近接して配置される。４枚のＬＥＤ基板１のそれぞれは、一例として略矩形を呈し、前面に複数のＬＥＤ１１を格子状に実装している。   The back frame 21 has a flat plate shape, and four LED substrates 1 are fixed to the front surface as an example, and a power supply unit (not shown) is provided on the back surface. The four LED substrates 1 are arranged on the front surface of the rear frame 21 so as to be close to each other in the vertical and horizontal directions. Each of the four LED substrates 1 has a substantially rectangular shape as an example, and a plurality of LEDs 11 are mounted on the front surface in a grid pattern.

バックライト２０は、ＬＥＤ１１から照射された光を、拡散板２２で拡散させた後に、液晶パネル１２０の背面に向かって全面にわたって略均一な照度で配光する。   The backlight 20 diffuses the light emitted from the LEDs 11 with the diffusion plate 22 and then distributes the light with a substantially uniform illuminance over the entire surface toward the back surface of the liquid crystal panel 120.

図２に示すように、ＬＥＤ基板１は、矩形の一方の短辺を、凸部１２１及び凹部１２２で構成し、隣接側端部１２としたものである。凸部１２１には、ＬＥＤ１１に駆動電圧を印加するために電源部に電気的に接続されるコネクタ１３が取り付けられている。コネクタ１３には、電源部から延出したハーネス（可撓性のフラットケーブル）が嵌入する。   As shown in FIG. 2, the LED substrate 1 is configured such that one short side of a rectangle is constituted by a convex portion 121 and a concave portion 122 to be an adjacent side end portion 12. A connector 13 that is electrically connected to the power supply unit in order to apply a driving voltage to the LED 11 is attached to the convex portion 121. A harness (flexible flat cable) extending from the power supply unit is fitted into the connector 13.

背面フレーム２１上で左右方向（隣接方向）に隣接する２枚のＬＥＤ基板１は、互いの隣接側端部１２を近接させている。隣接側端部１２は、隣接方向に直交する方向の中心について回転対称となる形状にされている。   Two LED boards 1 adjacent in the left-right direction (adjacent direction) on the back frame 21 have their adjacent side ends 12 close to each other. The adjacent side end portion 12 has a shape that is rotationally symmetric with respect to the center in the direction orthogonal to the adjacent direction.

図３に示すように、詳細には、コネクタ１３は、ＬＥＤ基板１の一部を隣接方向に突出させた凸部１２１に取り付けられている。また、凹部１２２には、凸部１２１から突出したコネクタ１３に接続されたハーネス３０との干渉をさせるべく、切欠き１２２１が形成されている。   As shown in FIG. 3, in detail, the connector 13 is attached to the convex part 121 which made a part of LED board 1 protrude in the adjacent direction. In addition, a notch 1221 is formed in the concave portion 122 so as to interfere with the harness 30 connected to the connector 13 protruding from the convex portion 121.

隣接方向に近接して配置された２枚のＬＥＤ基板１において、一方ＬＥＤ基板１の凸部１２１が、コネクタ１３と切欠き１２２１との間にハーネス３０を厚さ方向に挟んだ状態で、他方のＬＥＤ基板１の凹部１２２に嵌入する。２枚のＬＥＤ基板１をハーネス３０の厚さ分だけ離間した状態で隣接させることができ、各ＬＥＤ基板１における最も隣接側端部１２に近いＬＥＤ１１Ａ及びＬＥＤ１１Ｂの間隔を、各ＬＥＤ基板１における複数のＬＥＤ１の間隔に等しくすることができる。このため、バックライト２０におけるＬＥＤ１の配置間隔が一定になり、照度ムラを生じることがない。   In the two LED boards 1 arranged close to each other in the adjacent direction, the convex part 121 of the one LED board 1 has the harness 30 sandwiched in the thickness direction between the connector 13 and the notch 1221, and the other The LED board 1 is inserted into the recess 122. The two LED boards 1 can be adjacent to each other in the state of being separated by the thickness of the harness 30, and the distance between the LED 11 </ b> A and the LED 11 </ b> B that is closest to the adjacent end portion 12 in each LED board 1 is set to be plural in each LED board 1. Can be made equal to the spacing of the LEDs 1. For this reason, the arrangement | positioning space | interval of LED1 in the backlight 20 becomes fixed, and illumination intensity nonuniformity does not arise.

図４に示すように、背面フレーム２１の裏面側で、隣接方向における２枚のＬＥＤ基板１の中間部に、電源部４０を配置し、電源部４０のハーネス３０が貫通する孔部２１１を背面フレーム２１に形成する。各ＬＥＤ基板１のコネクタ１３と電源部４０との距離が短縮される。電源部のハーネスを背面フレーム２１の外側を経由してＬＥＤ基板の端部に接続する場合に比較して、ＬＥＤ基板の外側までＬＥＤを設けることができ、ディスプレイ装置の狭額縁化が可能である。また、ハーネス長が短縮される。ＬＥＤ１１に対する印加電圧の波形の鈍りを防止できる。また、背面フレーム２１の裏面側におけるスペースの自由度が高くなり、冷却用のダクト等の設計が容易になる。   As shown in FIG. 4, on the back side of the back frame 21, the power supply unit 40 is arranged in the middle part between the two LED boards 1 in the adjacent direction, and the hole 211 through which the harness 30 of the power supply unit 40 passes is provided on the back The frame 21 is formed. The distance between the connector 13 of each LED substrate 1 and the power supply unit 40 is shortened. Compared with the case where the harness of the power supply unit is connected to the end of the LED substrate via the outside of the back frame 21, the LED can be provided to the outside of the LED substrate, and the display device can be narrowed. . Further, the harness length is shortened. Dullness of the waveform of the applied voltage to the LED 11 can be prevented. Moreover, the freedom degree of the space in the back surface side of the back frame 21 becomes high, and design of the duct for cooling etc. becomes easy.

但し、各ＬＥＤ基板１における最も隣接側端部１２に近いＬＥＤ１１Ａ及びＬＥＤ１１Ｂの間隔を、各ＬＥＤ基板１における複数のＬＥＤ１の間隔に等しくできることを条件に、隣接側端部１２を直線で構成することもできる。   However, on the condition that the distance between the LED 11A and the LED 11B closest to the adjacent end 12 on each LED substrate 1 can be made equal to the interval between the plurality of LEDs 1 on each LED substrate 1, the adjacent end 12 is configured with a straight line. You can also.

この発明のＬＥＤ基板１を備えた照明装置は、液晶パネル１２０を備えたディスプレイ装置１００のバックライト２０だけでなく、面光源を必要とする装置に使用することができる。   The lighting device including the LED substrate 1 of the present invention can be used not only for the backlight 20 of the display device 100 including the liquid crystal panel 120 but also for a device that requires a surface light source.

また、この発明は、所定数のＬＥＤ１１を格子状に実装したＬＥＤ基板１だけでなく、所定数のＬＥＤ１１を直線状に実装した帯状のＬＥＤ基板にも適用することができる。但し、所定数のＬＥＤ１１を格子状に実装することで、同一の照明範囲に対するＬＥＤ基板の必要数を削減できる。   In addition, the present invention can be applied not only to the LED substrate 1 on which a predetermined number of LEDs 11 are mounted in a grid pattern, but also to a strip-shaped LED substrate on which a predetermined number of LEDs 11 are mounted linearly. However, the required number of LED substrates for the same illumination range can be reduced by mounting a predetermined number of LEDs 11 in a grid pattern.

さらに、この発明は、矩形のＬＥＤ基板だけでなく、２枚のＬＥＤ基板のそれぞれの同一の辺が近接するように組み合わせて矩形を形成することができる三角形等のＬＥＤ基板にも適用できる。   Furthermore, the present invention can be applied not only to a rectangular LED substrate, but also to an LED substrate such as a triangle that can form a rectangle by combining the two LED substrates so that the same sides are close to each other.

上述の実施形態の説明は、すべての点で例示であって、制限的なものではないと考えられるべきである。本発明の範囲は、上述の実施形態ではなく、特許請求の範囲によって示される。さらに、本発明の範囲には、特許請求の範囲と均等の意味および範囲内でのすべての変更が含まれることが意図される。   The above description of the embodiment is to be considered in all respects as illustrative and not restrictive. The scope of the present invention is shown not by the above embodiments but by the claims. Furthermore, the scope of the present invention is intended to include all modifications within the meaning and scope equivalent to the scope of the claims.

１−ＬＥＤ基板
１１−ＬＥＤ
１２−隣接側端部
１３−コネクタ
２０−バックライト（照明装置）
２１−背面フレーム
３０−ハーネス
４０−電源部
１００−ディスプレイ装置
１２１−凸部
１２２−凹部 1-LED board 11-LED
12-adjacent end 13-connector 20-backlight (lighting device)
21-back frame 30-harness 40-power supply unit 100-display device 121-convex portion 122-concave portion

Claims (5)

所定数のＬＥＤを実装し、互いに対向する隣接側端部を近接させて２枚が隣接方向に沿って隣接した状態で配置されるＬＥＤ基板であって、電源接続用のハーネスが接続されるコネクタを前記隣接側端部に配置したＬＥＤ基板。   A connector on which a predetermined number of LEDs are mounted, and adjacent end portions facing each other are arranged close to each other and two are arranged adjacent to each other in the adjacent direction, to which a harness for connecting a power supply is connected The LED board which has arrange | positioned in the said adjacent side edge part. 前記隣接側端部は、前記所定数のＬＥＤが格子状に実装される矩形の基板の一辺である請求項１に記載のＬＥＤ基板。   2. The LED substrate according to claim 1, wherein the adjacent side end is one side of a rectangular substrate on which the predetermined number of LEDs are mounted in a lattice shape. 前記接合用端部は、前記隣接方向に直交する方向の中心点について回転対称となる凹凸形状を呈する請求項１又は２に記載のＬＥＤ基板。   The LED substrate according to claim 1, wherein the joining end portion has an uneven shape that is rotationally symmetric about a center point in a direction orthogonal to the adjacent direction. ２枚の請求項１乃至３の何れかに記載のＬＥＤ基板が、前面に隣接して取り付けられるフレームと、
前記フレームの裏面側に配置され、前記２枚のＬＥＤ基板のそれぞれに個別のハーネスを介して電気的に接続される電源部と、を備え、
前記フレームにおける前記２枚のＬＥＤ基板の中間位置に前記ハーネスが貫通する孔部を形成した照明装置。 A frame on which the two LED substrates according to any one of claims 1 to 3 are attached adjacent to the front surface;
A power supply unit disposed on the back side of the frame and electrically connected to each of the two LED boards via individual harnesses,
A lighting device in which a hole through which the harness passes is formed at an intermediate position between the two LED substrates in the frame. 請求項４に記載の照明装置の前面側に配置される液晶パネルを備えたディスプレイ装置。   The display apparatus provided with the liquid crystal panel arrange | positioned at the front side of the illuminating device of Claim 4.
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