JP4733395B2 - LCD backlight using light emitting diode - Google Patents

LCD backlight using light emitting diode Download PDF

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JP4733395B2
JP4733395B2 JP2005001958A JP2005001958A JP4733395B2 JP 4733395 B2 JP4733395 B2 JP 4733395B2 JP 2005001958 A JP2005001958 A JP 2005001958A JP 2005001958 A JP2005001958 A JP 2005001958A JP 4733395 B2 JP4733395 B2 JP 4733395B2
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純二 宮下
和 大石
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Citizen Electronics Co Ltd
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本発明は、液晶表示装置を背面より照射する発光ダイオードを用いたLCDバックライトに関するものである。   The present invention relates to an LCD backlight using a light emitting diode that irradiates a liquid crystal display device from the back side.

近年、光通信部材を搭載したノート型パソコン、PDA、携帯電話等の各種電子機器の表示装置として、薄型で見やす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。このようなバックライト機構としては、液晶表示装置を背面から全面にわたり照射する面状光源が用いられており、その面状光源としては蛍光ランプまたは発光ダイオード（LED）よりなる発光源と、該LEDの照射光を一様にLCD側に拡散する拡散板を備えたものが一般的である。特に、小型化、薄型化及び長寿命化を目的として発光源としてLED等を用いた面状光源が多く使用されている。   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 a notebook personal computer, a PDA, and a mobile phone equipped with an optical communication member. As such a backlight mechanism, a planar light source that irradiates the entire surface of the liquid crystal display device from the back side is used. As the planar light source, a light emitting source composed of a fluorescent lamp or a light emitting diode (LED) and the LED are used. It is common to have a diffuser plate that uniformly diffuses the irradiated light to the LCD side. In particular, a planar light source using an LED or the like as a light emitting source is often used for the purpose of downsizing, thinning, and long life.

かかる面状光源により白色の照射光を出射させ、パネル等に対し白色の照射をしようとするとき、発光源として白色の蛍光ランプを用いるが、LEDの場合は、赤色（R）、緑色（G）、青色（B）の３種類の高輝度LEDを同時点灯、又は時分割点灯して、白色光を合成するのが一般的であった。更に最近は、LEDの場合、単独に白色に近い光を発光する白色のLEDが開発され、利用されるようになってきた。この白色のLEDを用いることにより、小型で簡単な構成で白色照明を目的とする面状光源を形成することが可能になった。（例えば、特許文献１参照）   When white illumination light is emitted by such a planar light source and white illumination is to be applied to a panel or the like, a white fluorescent lamp is used as the light emission source. In the case of LEDs, red (R), green (G ), Blue (B) high-intensity LEDs are generally turned on simultaneously or in a time-division manner to synthesize white light. More recently, in the case of LEDs, white LEDs that emit light close to white have been developed and used. By using this white LED, a planar light source intended for white illumination can be formed with a small and simple configuration. (For example, see Patent Document 1)

下記の特許文献１に開示されている発光ダイオードを用いた直下型のLCDバックライトは、図５に示すように、絶縁性を有するプリント基板１１の上面に複数個のLED（発光ダイオード）１２を所定の位置に実装する。前記LED１２の側面周囲を反射枠（枠部材）１３で囲み、前記LED１２に対向して、前記枠部材１３の上面に散乱シート（拡散板）１４を配設する。前記枠部材１３は、一般的に樹脂成型品で、可視光をより反射させるために白色のものが使用されることが多く、樹脂成型時に白色にして光を効率的に利用するのに、樹脂内に光を拡散させるために、シリカや酸化チタン等の拡散剤を充填して反射率を上げている。また、前記プリント基板１１の表面にLED１２の光を上方へ反射するために白色光沢印刷が施されている。
実開昭６４−４９８８６号公報（第３頁、図１） As shown in FIG. 5, a direct-type LCD backlight using a light emitting diode disclosed in Patent Document 1 below has a plurality of LEDs (light emitting diodes) 12 on the upper surface of an insulating printed board 11. Mount in place. A side surface of the LED 12 is surrounded by a reflection frame (frame member) 13, and a scattering sheet (diffusion plate) 14 is disposed on the upper surface of the frame member 13 so as to face the LED 12. The frame member 13 is generally a resin molded product, and a white one is often used to reflect visible light more. When the resin is molded, the frame member 13 is white to efficiently use light. In order to diffuse light inside, a diffusing agent such as silica or titanium oxide is filled to increase the reflectance. Further, white glossy printing is applied to the surface of the printed board 11 in order to reflect the light of the LED 12 upward.
Japanese Utility Model Publication No. 64-49886 (page 3, FIG. 1)

上記したLCDバックライトの構造において、一般に、発光源であるLED１２の照射光は、その殆どは拡散板１４から、LCDバックライトとしてLCD側に出射されるが、前記枠部材１３の内壁側に照射された光は、図５に示すように、装置内に散乱して、その一部は拡散板１４側に反射される。図６は、図５のLED１２の配置を示すもので、該LED１２は、赤色（R）、緑色（G）、青色（B）の三原色の光源であって、プリント基板11上に略等ピッチで均等に分散・配置されている。前記プリント基板１１の外周部のP1部は右側のみに配置されているので、青色（B）が、赤色（R）と緑色（G）に比べてより遠くに存在することになる。そのため、P1部では赤味がかった色になる。同様に、P２部は左側のみにLED１２が配置されているので、赤色（R）が弱くなるので、青味がかった色になる。プリント基板１１の中央部のP３部では左右上下とも略同数のLED１２が配置されている。   In the structure of the LCD backlight described above, generally, most of the irradiation light of the LED 12 as a light source is emitted from the diffusion plate 14 to the LCD side as the LCD backlight, but is irradiated to the inner wall side of the frame member 13. As shown in FIG. 5, the emitted light is scattered in the apparatus, and a part of the light is reflected to the diffusion plate 14 side. FIG. 6 shows the arrangement of the LEDs 12 in FIG. 5. The LEDs 12 are light sources of the three primary colors of red (R), green (G), and blue (B), and are arranged on the printed circuit board 11 at substantially equal pitches. Evenly distributed and arranged. Since the P1 portion of the outer peripheral portion of the printed circuit board 11 is disposed only on the right side, blue (B) exists farther than red (R) and green (G). Therefore, in P1 part, it becomes a reddish color. Similarly, since the LED 12 is disposed only on the left side of the P2 portion, red (R) is weakened, and thus the color becomes bluish. In the P3 portion at the center of the printed circuit board 11, substantially the same number of LEDs 12 are arranged on the left, right, top and bottom.

解決しようとする問題点は、上記したように、前記プリント基板１１の外周部にLED１２からの照射光は、その結果として、拡散板１４の中央部の出射光は均一であるが、拡散板１４の外周部は色ムラが発生し、外周部は中央部に比較して輝度が低下する。そのため混色が均一な有効なエリアがLED実装エリアより狭くなってしまう、という問題があった。   As described above, the problem to be solved is that, as described above, the light emitted from the LED 12 on the outer peripheral portion of the printed circuit board 11 is uniform in the light emitted from the central portion of the diffuser plate 14. Color unevenness occurs in the outer peripheral portion of the, and the luminance of the outer peripheral portion is lower than that in the central portion. Therefore, there is a problem that an effective area with uniform color mixture becomes narrower than the LED mounting area.

本発明は、上述した欠点を解消するために、その目的は、有効表示エリアに対し、LED実装エリアを同等にでき、光の利用効率を向上させことにより、色ムラと、輝度の低下を防止すことができ、拡散板からLCD側に均一な光を出射する発光ダイオードを用いたLCDバックライトを可能にしたものである。   In order to eliminate the above-mentioned drawbacks, the present invention aims to make the LED mounting area equivalent to the effective display area, and to improve the light utilization efficiency, thereby preventing color unevenness and luminance reduction. This enables an LCD backlight using a light emitting diode that emits uniform light from the diffuser to the LCD side.

上記課題を解決するために、本発明における発光ダイオードを用いたＬＣＤバックライトは、絶縁性を有するプリント基板の上面に複数の発光ダイオード（ＬＥＤ）を実装し、前記ＬＥＤの側面周囲を枠部材で囲み、前記ＬＥＤに対向して、枠部材の上面に拡散板を配設した直下型のＬＣＤバックライトにおいて、前記ＬＥＤは、赤色（R）、緑色（G）、緑色（G）、青色（B）の４つを緑色（G）、緑色（G）が対角線上に、赤色（R）、青色（B）が残りの対角線上に並ぶように１ブロックとしたものを複数並べ、前記ＬＥＤの配置の外周部における縦列の配列が「緑色（G）、赤色（R）、緑色（G）、赤色（R）」となる順序の繰り返しで、横列の配列が「緑色（G）、青色（B）、緑色（G）、青色（B）・・・」となる順序の繰り返しの配列となる光源であって、
前記ＬＥＤの配置の外周部の配列順序を、縦列は「緑色（G）、青色（B）、緑色（G）、赤色（R）」となる順序の繰り返しの配列に、また横列は「緑色（G）、赤色（R）、緑色（G）、青色（B）」となる順序の繰り返しの配列になるように、それぞれ前記ＬＥＤの配列順序を一部変更することにより、前記外周部は中央部と同等の色調が得られることを特徴とするものである。
In order to solve the above problems, an LCD backlight using a light emitting diode according to the present invention has a plurality of light emitting diodes (LEDs) mounted on the upper surface of an insulating printed board, and a frame member around the side surface of the LED. surrounds, opposite the LED, the direct-type LCD backlight diffuser plate is disposed on the upper surface of the frame member, the LED is red (R), green (G), green (G), blue (B 4) green (G), green (G) on the diagonal, red (R), blue (B) are arranged in one block so that they are aligned on the other diagonal, and the arrangement of the LEDs The sequence of columns in the outer periphery of the column is “green (G), red (R), green (G), red (R)” in the order of repetition, and the row arrangement is “green (G), blue (B) , Green (G), blue (B), ... " The source,
The arrangement order of the outer peripheral portion of the LED arrangement is such that the vertical column is “green (G), blue (B), green (G), red (R)”, and the horizontal row is “green (G G), red (R), green (G), blue (B) "by changing the arrangement order of the LEDs so that the outer peripheral portion is a central portion. It is characterized in that the same color tone can be obtained.

絶縁性を有するプリント基板の上面に複数の発光ダイオード（ＬＥＤ）を実装し、前記ＬＥＤの側面周囲を枠部材で囲み、前記ＬＥＤに対向して、枠部材の上面に拡散板を配設した直下型のＬＣＤバックライトにおいて、前記ＬＥＤは、赤色（R）、緑色（G）、緑色（G）、青色（B）の４つを緑色（G）、緑色（G）が対角線上に、赤色（R）、青色（B）が残りの対角線上に並ぶように１ブロックとしたものを複数並べ、前記ＬＥＤの配置の外周部における縦列の配列が「緑色（G）、赤色（R）、緑色（G）、赤色（R）」となる順序の繰り返しで、横列の配列が「緑色（G）、青色（B）、緑色（G）、青色（B）」となる順序の繰り返しの配列となる光源であって、前記ＬＥＤの配置の外周部に、赤色（R）、緑色（G）、青色（B）が一つのパッケージの中に実装された３ｉｎ１−ＬＥＤのＬＥＤを配設することにより、前記外周部は中央部と同等の色調が得られることを特徴とする発光ダイオードを用いたＬＣＤバックライト。
Immediately below mounting a plurality of light emitting diodes (LED) on the upper surface of the printed circuit board having an insulating property, surrounds the periphery of the side surface of the LED in the frame member, in opposition to the LED, it is disposed a diffuser on the upper surface of the frame member In the type of LCD backlight, the LEDs are red (R), green (G), green (G), blue (B) , green (G), green (G) on the diagonal, red ( R) and blue (B) are arranged in a single block so that they are arranged on the remaining diagonal line, and the arrangement of columns in the outer periphery of the LED arrangement is “green (G), red (R), green ( G), red (R) "in a repeating sequence, and the row arrangement is" green (G), blue (B), green (G), blue (B) " In the outer periphery of the LED arrangement , red (R), green (G), and blue (B) are included in one package. An LCD backlight using a light emitting diode, wherein a 3 to 1-LED LED mounted therein is provided so that the outer peripheral portion has a color tone equivalent to that of a central portion.

絶縁性を有するプリント基板の上面に複数の発光ダイオード（ＬＥＤ）を実装し、前記ＬＥＤの側面周囲を枠部材で囲み、前記ＬＥＤに対向して、枠部材の上面に拡散板を配設した直下型のＬＣＤバックライトにおいて、前記ＬＥＤは、赤色（R）、緑色（G）、緑色（G）、青色（B）の４つを緑色（G）、緑色（G）が対角線上に、赤色（R）、青色（B）が残りの対角線上に並ぶように１ブロックとしたものを複数並べ、前記ＬＥＤの配置の外周部における縦列の配列が「緑色（G）、赤色（R）、緑色（G）、赤色（R）」となる順序の繰り返しで、横列の配列が「緑色（G）、青色（B）、緑色（G）、青色（B）」となる順序の繰り返しの配列となる光源であって、前記ＬＥＤの配置箇所は、前記プリント基板の上面以外に、前記枠部材の内壁にライン状に実装した赤色（R）、緑色（G）、青色（B）の単色のＬＥＤ、もしくは赤色（Ｒ）、緑色（Ｇ）、青色（Ｂ）が一つのパッケージの中に実装された３ｉｎ１−ＬＥＤのＬＥＤを配設することにより、前記外周部は中央部と同等の色調が得られることを特徴とする発光ダイオードを用いたＬＣＤバックライト。
Immediately below mounting a plurality of light emitting diodes (LED) on the upper surface of the printed circuit board having an insulating property, surrounds the periphery of the side surface of the LED in the frame member, in opposition to the LED, it is disposed a diffuser on the upper surface of the frame member In the type of LCD backlight, the LEDs are red (R), green (G), green (G), blue (B) , green (G), green (G) on the diagonal, red ( R) and blue (B) are arranged in a single block so that they are arranged on the remaining diagonal line, and the arrangement of columns in the outer periphery of the LED arrangement is “green (G), red (R), green ( G), red (R) "in a repeating sequence, and the row arrangement is" green (G), blue (B), green (G), blue (B) " And the arrangement | positioning location of the said LED is a line in the inner wall of the said frame member other than the upper surface of the said printed circuit board. Red (R), green (G), and blue (B) single-color LEDs mounted in a single shape, or red (R), green (G), and blue (B) mounted in one package An LCD backlight using a light-emitting diode, characterized in that the outer peripheral portion has a color tone equivalent to that of a central portion by disposing an LED .

本発明の発光ダイオードを用いたLCDバックライトは、プリント基板上に配置するLEDの配置密度の変化、配列順序の変更、３in1−LED の使用、枠部材にライン光源の配置などを行うことにより、外周部は中央部と同等の色調が得られる。従って、基板外周部の色ムラが防止され、輝度の低下を防ぐことができる。有効表示エリアに対し、LED実装エリアを同等にでき、省スペース化になる。有効表示エリアに対し、LEDの搭載数を減らすことが期待できる。   The LCD backlight using the light emitting diode of the present invention can be achieved by changing the arrangement density of LEDs arranged on the printed circuit board, changing the arrangement order, using 3 in 1-LED, arranging the line light source on the frame member, etc. A color tone equivalent to that of the central portion is obtained at the outer peripheral portion. Therefore, color unevenness at the outer periphery of the substrate can be prevented, and a reduction in luminance can be prevented. The LED display area can be made equal to the effective display area, saving space. It can be expected to reduce the number of LEDs mounted on the effective display area.

本発明の発光ダイオードを用いたLCDバックライトについて、図面に基づいて説明する。   An LCD backlight using the light emitting diode of the present invention will be described with reference to the drawings.

図１は、本発明の実施例１に係わり、図１（a）は、直下型のLCDバックライト装置の要部断面図、図１（b）は、基板上に実装された三原色LEDの部分平面図である。図１において、１はガラスエポキシ樹脂などよりなる絶縁性を有するプリント基板で、前記プリント基板１の上面の所定位置に、複数個のLED２を実装する。前記LED２は、赤色（R）、緑色（G）、青色（B）の三原色の光源であって、前記プリント基板１の外周部であるP1部近傍から見たLED２の配置において、プリント基板１の中央部であるP3部に比べて狭いピッチにする。前記LED２に対向して、前記枠部材３（図４参照）の上面に拡散板４を配設して発光ダイオードを用いたLCDバックライトを構成する。   FIG. 1 relates to Embodiment 1 of the present invention, FIG. 1 (a) is a cross-sectional view of a main part of a direct type LCD backlight device, and FIG. 1 (b) is a part of three primary color LEDs mounted on a substrate. It is a top view. In FIG. 1, reference numeral 1 denotes an insulating printed board made of glass epoxy resin or the like, and a plurality of LEDs 2 are mounted at predetermined positions on the upper surface of the printed board 1. The LED 2 is a light source of three primary colors of red (R), green (G), and blue (B), and the LED 2 is arranged in the vicinity of the P1 portion that is the outer peripheral portion of the printed circuit board 1. The pitch is narrower than the central P3 part. Opposite the LED 2, a diffusion plate 4 is disposed on the upper surface of the frame member 3 (see FIG. 4) to constitute an LCD backlight using a light emitting diode.

以上述べた構成のLCDバックライトの作用・効果について説明する。プリント基板１の外周部のLED２の配置を中央部より狭いピッチで配置することで、赤色（R）と青色（B）が略同じ位置に存在するとみなすことができる。外周部は中央部と同等の色調が得られることが可能である。従って、光の利用効率が良くなり、色ムラと輝度低下を防止することができる。   The operation and effect of the LCD backlight configured as described above will be described. By arranging the LEDs 2 on the outer peripheral portion of the printed circuit board 1 at a narrower pitch than the central portion, it can be considered that red (R) and blue (B) are present at substantially the same position. The outer peripheral portion can obtain the same color tone as the central portion. Therefore, the light utilization efficiency is improved, and color unevenness and luminance reduction can be prevented.

図２は、本発明の実施例２に係わる基板上に実装された三原色のLEDの配置を説明する平面図である。図2において、プリント基板１の外周部に通常配列された、赤色（R）、緑色（G）、青色（B）の三原色のLED２の中で、プリント基板１の外周部の縦列に配置した一部、例えば、Y1、Y2、Y3の赤色(R)のLED２を青色（B）のLED２に変更することで、赤味がかった色調が変更されて、中央部と同等の色調が得られる。同様に、プリント基板１の外周部の横列に配置した一部、例えば、X1、X2、X3の青色(B)のLED２を赤色（R）のLED２に変更することで、青味がかった色調が変更されて、中央部と同等の色調が得られる。   FIG. 2 is a plan view for explaining the arrangement of three primary color LEDs mounted on a substrate according to Embodiment 2 of the present invention. In FIG. 2, among the LEDs 2 of the three primary colors of red (R), green (G), and blue (B), which are usually arranged on the outer peripheral portion of the printed circuit board 1, one arranged in a column in the outer peripheral portion of the printed circuit board 1. For example, by changing the red (R) LED 2 of Y1, Y2, and Y3 to the blue (B) LED 2, the reddish color tone is changed, and the same color tone as the central portion is obtained. Similarly, by changing the blue (B) LED2 of X1, X2, and X3 blue (B) LEDs to red (R) LED2 in a row on the outer periphery of the printed circuit board 1, a bluish color tone is obtained. The color tone equivalent to that of the central part is obtained by being changed.

以上述べた構成のLCDバックライトの作用・効果について説明する。前記プリント基板１の外周部に配置するLED２の配列順序を一部変更することにより、赤味がかった縦列、青味がかった横列の外周部は、それぞれ、中央部と同等の色調が得られることにより、色ムラと輝度低下を防止することができる。   The operation and effect of the LCD backlight configured as described above will be described. By changing the arrangement order of the LEDs 2 arranged on the outer peripheral part of the printed circuit board 1, the reddish vertical column and the bluish horizontal outer peripheral part each have the same color tone as the central part. Thus, color unevenness and luminance reduction can be prevented.

図３は、本発明の実施例３に係わり、図３（a）は、３in1−LEDを説明するための平面図、図３（b）は、基板上に実装された三原色のLEDの配置を説明する平面図である。図３において、前記プリント基板１の外周部に実装するLED２は、赤色（R）、緑色（G）、青色（B）が一つのパッケージの中に実装された３in1−LED２Aであり、この３in1−LED２Aは、青緑味に発光させることで、図６で説明したプリント基板１１の外周部のP1部での赤味がかった色を白色化する。同様に、同様に、P２部には、赤緑味で発光させ白色化させる。従って、外周部は中央部と同等の色調が得られる。   FIG. 3 relates to Example 3 of the present invention, FIG. 3 (a) is a plan view for explaining a 3in1-LED, and FIG. 3 (b) is an arrangement of three primary color LEDs mounted on a substrate. It is a top view to explain. In FIG. 3, the LED 2 mounted on the outer periphery of the printed circuit board 1 is a 3in1-LED2A in which red (R), green (G), and blue (B) are mounted in one package. The LED 2A emits light in a bluish green color to whiten the reddish color at the P1 portion of the outer peripheral portion of the printed circuit board 11 described in FIG. Similarly, P2 part is made to emit light in reddish green to be whitened. Therefore, the outer peripheral portion can obtain the same color tone as the central portion.

以上述べた構成のLCDバックライトの作用・効果について説明する。前記プリント基板１の外周部に３in1−LED２Aを配置することで、白色化することが可能で、外周部は中央部と同等の色調が得られることにより、色ムラと輝度低下を防止することができる。   The operation and effect of the LCD backlight configured as described above will be described. By arranging the 3 in 1-LED 2A on the outer peripheral portion of the printed circuit board 1, it is possible to whiten, and the outer peripheral portion can obtain the same color tone as the central portion, thereby preventing color unevenness and luminance reduction. it can.

図４は、本発明の実施例４に係わる基板上及び枠部材内壁に三原色のLEDの配置を説明する要部斜視図である。図４において、LED２の配置箇所は、前述したプリント基板１上に赤色（R）、緑色（G）、青色（B）の三原色のLED２を均等に分散・配置すると同時に、外周部の色ムラを防止させるために、前記枠部材３の内壁にライン状に赤色（R）、緑色（G）、青色（B）の単色LED２もしくは、実施例３で記載した３in1−LED（図示せず）を配置することで、外周部を白色化することができ、外周部は中央部と同等の色調が得られる。   FIG. 4 is a perspective view of a main part for explaining the arrangement of the three primary color LEDs on the substrate and the inner wall of the frame member according to the fourth embodiment of the present invention. In FIG. 4, the LED 2 is disposed on the printed circuit board 1 as described above, in which the red (R), green (G), and blue (B) LEDs 2 are uniformly distributed and arranged, and at the same time, the color unevenness in the outer peripheral portion is also eliminated. In order to prevent this, red (R), green (G), and blue (B) single-color LEDs 2 or 3in1-LEDs (not shown) described in the third embodiment are arranged on the inner wall of the frame member 3 in a line shape. By doing so, an outer peripheral part can be whitened and the outer peripheral part can obtain the color tone equivalent to a center part.

以上述べた構成のLCDバックライトの作用・効果について説明する。前記プリント基板１以外に枠部材３の内壁にライン状に三原色のLED２もしくは３in1−LED２Aを配置することで、白色化することが可能で、外周部は中央部と同等の色調が得られる。   The operation and effect of the LCD backlight configured as described above will be described. In addition to the printed circuit board 1, by arranging the three primary color LEDs 2 or 3 in 1 -LED 2 A in a line shape on the inner wall of the frame member 3, it is possible to whiten the outer peripheral portion and obtain the same color tone as the central portion.

以上のべたように、本発明のLCDバックライトは、プリント基板の外周部の色ムラ防止及び輝度低下を防止することかできる。有効表示エリアに対してLED実装エリアを同等にできるため、省スペース化となる。有効表示エリアに対し、LEDの搭載数を減らすことが期待できる。   As described above, the LCD backlight of the present invention can prevent color unevenness and luminance reduction at the outer peripheral portion of the printed circuit board. Since the LED mounting area can be made equal to the effective display area, space is saved. It can be expected to reduce the number of LEDs mounted on the effective display area.

本発明の実施例１に係わり、図１（a）は、直下型のLCDバックライト装置の要部断面図、図１（b）は、基板上に実装された三原色LEDの部分平面図である。FIG. 1A is a cross-sectional view of an essential part of a direct type LCD backlight device, and FIG. 1B is a partial plan view of three primary color LEDs mounted on a substrate, according to Embodiment 1 of the present invention. . 本発明の実施例２に係わる基板上に実装された三原色のLEDの配置を説明する平面図である。It is a top view explaining arrangement | positioning of the three primary color LED mounted on the board | substrate concerning Example 2 of this invention. 本発明の実施例３に係わり、図３（a）は、３in1−LEDを説明するための平面図、図３（b）は、基板上に実装された三原色のLEDの配置を説明する平面図である。FIG. 3A is a plan view for explaining the 3in1-LED, and FIG. 3B is a plan view for explaining the arrangement of the three primary color LEDs mounted on the substrate. It is. 本発明の実施例４に係わる基板上及び枠部材内壁に三原色のLEDの配置を説明する要部斜視図である。It is a principal part perspective view explaining arrangement | positioning of three primary color LED on the board | substrate concerning the Example 4 of this invention, and a frame member inner wall. 従来の直下型のLCDバックライト装置の断面図である。It is sectional drawing of the conventional direct type | mold LCD backlight apparatus. 図６（a）は、図５のLCDバックライト装置の要部断面図、図６（b）は、基板上に実装された三原色LEDの平面図である。6A is a cross-sectional view of the main part of the LCD backlight device of FIG. 5, and FIG. 6B is a plan view of the three primary color LEDs mounted on the substrate.

符号の説明Explanation of symbols

１ プリント基板
２ LED
２A ３in1−LED
３ 枠部材
４ 拡散板

1 Printed circuit board 2 LED
2A 3in1-LED
3 Frame member 4 Diffusion plate

Claims (3)

絶縁性を有するプリント基板の上面に複数の発光ダイオード（ＬＥＤ）を実装し、前記ＬＥＤの側面周囲を枠部材で囲み、前記ＬＥＤに対向して、枠部材の上面に拡散板を配設した直下型のＬＣＤバックライトにおいて、前記ＬＥＤは、赤色（R）、緑色（G）、緑色（G）、青色（B）の４つを緑色（G）、緑色（G）が対角線上に、赤色（R）、青色（B）が残りの対角線上に並ぶように１ブロックとしたものを複数並べ、前記ＬＥＤの配置の外周部における縦列の配列が「緑色（G）、赤色（R）、緑色（G）、赤色（R）」となる順序の繰り返しで、横列の配列が「緑色（G）、青色（B）、緑色（G）、青色（B）」となる順序の繰り返しの配列となる光源であって、前記ＬＥＤの配置の外周部の配列順序を、縦列は「緑色（G）、青色（B）、緑色（G）、赤色（R）」となる順序の繰り返しの配列に、また横列は「緑色（G）、赤色（R）、緑色（G）、青色（B）」となる順序の繰り返しの配列になるように、それぞれ前記ＬＥＤの配列順序を一部変更することにより、前記外周部は中央部と同等の色調が得られることを特徴とする発光ダイオードを用いたＬＣＤバックライト。 Immediately below mounting a plurality of light emitting diodes (LED) on the upper surface of the printed circuit board having an insulating property, surrounds the periphery of the side surface of the LED in the frame member, in opposition to the LED, it is disposed a diffuser on the upper surface of the frame member In the type of LCD backlight, the LEDs are red (R), green (G), green (G), blue (B), green (G), green (G) on the diagonal, red ( R) and blue (B) are arranged in a single block so that they are arranged on the remaining diagonal line, and the arrangement of columns in the outer periphery of the LED arrangement is “green (G), red (R), green ( G), red (R) "in a repeating sequence, and the row arrangement is" green (G), blue (B), green (G), blue (B) " In the arrangement order of the outer peripheral portion of the LED arrangement, the columns are “green (G), blue (B), green (G), Red (R) "in a repeating arrangement, and the rows are" green (G), red (R), green (G), blue (B) " by respectively partially changed order of arrangement of the LED, the outer peripheral portion LCD backlight using the light-emitting diodes, characterized in that the same colors and the central portion is obtained. 絶縁性を有するプリント基板の上面に複数の発光ダイオード（ＬＥＤ）を実装し、前記ＬＥＤの側面周囲を枠部材で囲み、前記ＬＥＤに対向して、枠部材の上面に拡散板を配設した直下型のＬＣＤバックライトにおいて、前記ＬＥＤは、赤色（R）、緑色（G）、緑色（G）、青色（B）の４つを緑色（G）、緑色（G）が対角線上に、赤色（R）、青色（B）が残りの対角線上に並ぶように１ブロックとしたものを複数並べ、前記ＬＥＤの配置の外周部における縦列の配列が「緑色（G）、赤色（R）、緑色（G）、赤色（R）」となる順序の繰り返しで、横列の配列が「緑色（G）、青色（B）、緑色（G）、青色（B）」となる順序の繰り返しの配列となる光源であって、前記ＬＥＤの配置の外周部に、赤色（R）、緑色（G）、青色（B）が一つのパッケージの中に実装された３ｉｎ１−ＬＥＤのＬＥＤを配設することにより、前記外周部は中央部と同等の色調が得られることを特徴とする発光ダイオードを用いたＬＣＤバックライト。 Immediately below mounting a plurality of light emitting diodes (LED) on the upper surface of the printed circuit board having an insulating property, surrounds the periphery of the side surface of the LED in the frame member, in opposition to the LED, it is disposed a diffuser on the upper surface of the frame member In the type of LCD backlight, the LEDs are red (R), green (G), green (G), blue (B) , green (G), green (G) on the diagonal, red ( R) and blue (B) are arranged in a single block so that they are arranged on the remaining diagonal line, and the arrangement of columns in the outer periphery of the LED arrangement is “green (G), red (R), green ( G), red (R) "in a repeating sequence, and the row arrangement is" green (G), blue (B), green (G), blue (B) " In the outer periphery of the LED arrangement , red (R), green (G), and blue (B) are included in one package. An LCD backlight using a light emitting diode, wherein a 3 to 1-LED LED mounted therein is provided so that the outer peripheral portion has a color tone equivalent to that of a central portion. 絶縁性を有するプリント基板の上面に複数の発光ダイオード（ＬＥＤ）を実装し、前記ＬＥＤの側面周囲を枠部材で囲み、前記ＬＥＤに対向して、枠部材の上面に拡散板を配設した直下型のＬＣＤバックライトにおいて、前記ＬＥＤは、赤色（R）、緑色（G）、緑色（G）、青色（B）の４つを緑色（G）、緑色（G）が対角線上に、赤色（R）、青色（B）が残りの対角線上に並ぶように１ブロックとしたものを複数並べ、前記ＬＥＤの配置の外周部における縦列の配列が「緑色（G）、赤色（R）、緑色（G）、赤色（R）」となる順序の繰り返しで、横列の配列が「緑色（G）、青色（B）、緑色（G）、青色（B）」となる順序の繰り返しの配列となる光源であって、前記ＬＥＤの配置箇所は、前記プリント基板の上面以外に、前記枠部材の内壁にライン状に実装した赤色（R）、緑色（G）、青色（B）の単色のＬＥＤ、もしくは赤色（Ｒ）、緑色（Ｇ）、青色（Ｂ）が一つのパッケージの中に実装された３ｉｎ１−ＬＥＤのＬＥＤを配設することにより、前記外周部は中央部と同等の色調が得られることを特徴とする発光ダイオードを用いたＬＣＤバックライト。
Immediately below mounting a plurality of light emitting diodes (LED) on the upper surface of the printed circuit board having an insulating property, surrounds the periphery of the side surface of the LED in the frame member, in opposition to the LED, it is disposed a diffuser on the upper surface of the frame member In the type of LCD backlight, the LEDs are red (R), green (G), green (G), blue (B) , green (G), green (G) on the diagonal, red ( R) and blue (B) are arranged in a single block so that they are arranged on the remaining diagonal line, and the arrangement of columns in the outer periphery of the LED arrangement is “green (G), red (R), green ( G), red (R) "in a repeating sequence, and the row arrangement is" green (G), blue (B), green (G), blue (B) " And the arrangement | positioning location of the said LED is a line in the inner wall of the said frame member other than the upper surface of the said printed circuit board. Red (R), green (G), and blue (B) single-color LEDs mounted in a single shape, or red (R), green (G), and blue (B) mounted in one package An LCD backlight using a light-emitting diode, characterized in that the outer peripheral portion has a color tone equivalent to that of a central portion by disposing an LED .
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