JP4966146B2 - Surface emitting device - Google Patents

Surface emitting device Download PDF

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JP4966146B2
JP4966146B2 JP2007248104A JP2007248104A JP4966146B2 JP 4966146 B2 JP4966146 B2 JP 4966146B2 JP 2007248104 A JP2007248104 A JP 2007248104A JP 2007248104 A JP2007248104 A JP 2007248104A JP 4966146 B2 JP4966146 B2 JP 4966146B2
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light
pattern
light guide
guide plate
decorative sheet
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JP2009080982A (en
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秀基 田中
達司 大野
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Panasonic Corp
Panasonic Holdings Corp
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Panasonic Corp
Matsushita Electric Industrial Co Ltd
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Description

本発明は、面発光装置に関し、詳しくは一端面から入射した光源からの光を一主面から出射して面発光させる導光板の出射側に、光透過性を有する化粧シートを重ね合わせて配し、導光板の面発光により化粧シートを光らせて化粧シートの柄模様を浮き上がらせるようにした面発光装置に関するものである。   The present invention relates to a surface light-emitting device, and more specifically, a light-transmitting decorative sheet is superposed on an emission side of a light guide plate that emits light from a light source incident from one end surface and emits light from one main surface. In addition, the present invention relates to a surface light emitting device in which a decorative sheet is lit by surface light emission of a light guide plate to lift a pattern of the decorative sheet.

従来から、屋内・屋外において、表示、演出、明かりの目的に用いられる発光装置において、発光部の領域を面とする導光技術が一般的に知られている。   2. Description of the Related Art Conventionally, in a light emitting device used for display, production, and lighting purposes indoors / outdoors, a light guide technique that faces a region of a light emitting unit is generally known.

例えば、一端面から入射した光源からの光を一主面から出射して面発光させる導光板の出射側に、木目等の柄模様を有する化粧シートを重ね合わせて配した面発光装置においては、導光板の一端面を光の入射面とし、出射する一表面を一主面としているが、光源に近い側では発光量が多くなって過剰な輝部や明部を生じさせ、一方、光源から遠ざかるにしたがって発光量が弱まって暗部を生じさせるという欠点があり、このため柄模様が全体的に均一な明るさにならないという問題があった。   For example, in a surface light emitting device in which a decorative sheet having a pattern such as a wood grain is superimposed on the light exit side of a light guide plate that emits light from a light source incident from one end surface and emits light from one main surface, One end surface of the light guide plate is used as the light incident surface, and one outgoing surface is used as one main surface. However, on the side closer to the light source, the amount of light emission increases, resulting in excessive bright and bright portions, while As the distance increases, the amount of emitted light is weakened to cause a dark part. For this reason, there is a problem that the pattern pattern does not have uniform brightness as a whole.

そこで従来から、導光板の一主面に、導光板内に入射した光を屈折または散乱させるための導光パターンを付与して、導光板の面発光を全体的に均一にできるようにしたエッジライトパネルが知られている(例えば、特許文献1参照)。   Therefore, conventionally, a light guide pattern for refracting or scattering light incident on the light guide plate is provided on one main surface of the light guide plate, so that the surface emission of the light guide plate can be made uniform as a whole. A light panel is known (see, for example, Patent Document 1).

しかしながら、上記特許文献1に開示されている従来のエッジライトパネルをバックライトにして前方の柄模様を浮かび上がらせる装置においては、例えば図3(a)に示すように、光透過性を有する化粧シート5の柄模様4が木目調の非線形パターンで、一方、その背後に配置されるライトエッジパネル1’に付与された導光パターン6が例えば図3(b)に示すような線形パターンの場合にあっては、図3(c)(d)に示すように、柄模様4の表示領域と導光パターン6とがずれて一致しなくなり、このため柄模様4の表示領域内で導光パターン6による暗部A〜Aと明部B〜Bとが発生してしまい、観察者に不自然な印象を与えてしまうことになり、結果、意図した柄模様4の表現ができなくなり、デザイン性が低下するという課題を有している。 However, in the apparatus for raising the front handle pattern by using the conventional edge light panel disclosed in Patent Document 1 as a backlight, for example, as shown in FIG. 5 is a non-linear pattern of wood grain, while the light guide pattern 6 applied to the light edge panel 1 ′ arranged behind the pattern 4 is a linear pattern as shown in FIG. 3B, for example. In this case, as shown in FIGS. 3C and 3D, the display area of the pattern 4 and the light guide pattern 6 are shifted and do not coincide with each other. The dark portions A 1 to A 3 and the bright portions B 1 to B 3 are generated due to the above, and an unnatural impression is given to the observer. As a result, the intended pattern 4 cannot be expressed, When design is degraded It has the cormorant problem.

そこで、他の従来例として、導光パターンと化粧シートとの間に光拡散用シートを介在させて、導光パターンの印象を緩和する工夫(例えば特許文献2参照)も試みられているが、光拡散用シートを別途設けることで、部品点数が増えてコストアップを招くだけでなく、例えば光拡散用シートが白色の場合は、この色の影響で、意図した柄模様(特に暗色系)の表現がしづらくなり、そのうえ、光拡散用シートを介在させることによる光の減衰、反射、吸収等が発生して、明るさ(発光面輝度)が低減するという新たな課題が生じる。
特開2000−98371号公報 特開2006−322968号公報
Therefore, as another conventional example, an attempt has been made to relax the impression of the light guide pattern by interposing a light diffusion sheet between the light guide pattern and the decorative sheet (see, for example, Patent Document 2). Providing a separate light diffusion sheet not only increases the number of parts and increases the cost, but also when the light diffusion sheet is white, for example, due to the influence of this color, the intended pattern (especially dark color system) In addition, it becomes difficult to express, and furthermore, light attenuation, reflection, absorption, etc. occur due to the interposition of the light diffusion sheet, and a new problem arises that the brightness (light emitting surface luminance) is reduced.
JP 2000-98371 A JP 2006-322968 A

本発明は上記の従来の問題点に鑑みて発明したものであって、従来の光拡散用シートを用いずに柄模様の表示領域内での導光パターンの印象を抑えることができるようになり、低コストで、意図した柄模様の表現が可能となり、デザイン性の向上を図ることができる面発光装置を提供することを課題とするものである。   The present invention has been invented in view of the above-mentioned conventional problems, and can suppress the impression of a light guide pattern in a display area of a pattern without using a conventional light diffusion sheet. An object of the present invention is to provide a surface light-emitting device that can express an intended pattern at low cost and can improve design.

前記課題を解決するために本発明は、一端面2aから入射した光源3からの光を一主面2bから出射して面発光させる導光板2と、導光板2の出射側Cに重ね合わせて配置される光透過性の化粧シート5とを備え、導光板2の面発光により化粧シート5に光を透過させて化粧シート5の柄模様を浮き上がらせる面発光装置であって、前記光源からの光が導光板2全体に分散して導光板2が均一に面発光するように、前記導光板2の一主面2bに、入射面となる一端面2aに近い側で疎、前記一端面から離れるに従って疎から密へと次第に変化する面積比率となって、前記一端面近傍を起点にして該一端面2aから離れるに従って光源3からの光を屈折または散乱させる度合いを大きくす導光パターン6を付与すると共に、前記導光パターン6のパターン形状を正面視で前記化粧シート5の柄模様4の表示領域ほぼ重なり合うと共に一部が前記表示領域からはみ出すように設定したことを特徴としている。 In order to solve the above-mentioned problems, the present invention superimposes the light guide plate 2 that emits light from the light source 3 incident from one end surface 2a and emits light from one main surface 2b on the emission side C of the light guide plate 2. A light-emitting decorative sheet 5 that is disposed, and transmits light to the decorative sheet 5 by surface light emission of the light guide plate 2 to lift the pattern of the decorative sheet 5 , The light guide plate 2 is sparse on the main surface 2b of the light guide plate 2 on the side close to the one end surface 2a and from the one end surface so that the light is dispersed throughout the light guide plate 2 and the light guide plate 2 emits light evenly. It becomes gradually changing area ratio to neglect et closely with increasing distance, the one end face near to the starting point of the degree of increase to that light to refract or scatter light from the light source 3 with distance from the one end face 2a pattern 6 with grant, the light guide pattern Some with substantially overlapping patterns shape in a front view the display region of the handle pattern 4 of the decorative sheet 5 of is characterized in that set so as to protrude from the display area.

このような構成とすることで、導光板2の面発光を均一にするための導光パターン6を導光板2の出射側Cに重ね合わせて配置される化粧シート5の柄模様4の表示領域とほぼ一致するパターン形状とすることにより、導光パターン6が柄模様4と調和して、柄模様4の表示領域内での導光パターン6の印象を抑えることができるようになる。従って、柄模様4の輝度分布が均一となって意図した柄模様4の表現が可能となり、デザイン性を向上させることができる。   By adopting such a configuration, the display area of the pattern 4 of the decorative sheet 5 arranged so that the light guide pattern 6 for making the surface light emission of the light guide plate 2 uniform is superimposed on the emission side C of the light guide plate 2. The shape of the light guide pattern 6 is in harmony with the pattern 4, and the impression of the light guide pattern 6 in the display area of the pattern 4 can be suppressed. Therefore, the brightness distribution of the pattern 4 is uniform, and the intended pattern 4 can be expressed, thereby improving the design.

本発明は、導光板の均一な面発光を達成するための導光パターンを化粧シートの柄模様の表示領域と正面視でほぼ重なり合うパターン形状とするだけで、従来のような光拡散用シート等を用いなくても、柄模様の表示領域内での導光パターンの印象を抑えることができるようになり、デザイン性に優れた装飾効果、演出効果を低コストで創出できるものである。   In the present invention, a light guide sheet for achieving uniform surface light emission of a light guide plate is simply a pattern shape that overlaps with a pattern display area of a decorative sheet in a front view, and a conventional light diffusion sheet or the like. Even without using, it is possible to suppress the impression of the light guide pattern in the display area of the design pattern, and it is possible to create a decoration effect and a production effect excellent in design at low cost.

以下、本発明を添付図面に示す実施形態に基いて説明する。   Hereinafter, the present invention will be described based on embodiments shown in the accompanying drawings.

図1(a)は面発光装置1の一例を平面図に模式的に示したものであり、光源3と、光源3からの光を一端面2aより取り入れて、取り入れた光を一主面2b全面から出射させる導光板2と、導光板2の出射側Cに重ね合わせて配置される光透過性を有する化粧シート5とを備えている。図中の7は導光板2の裏面2c側に配置される例えば白色の光反射部、Eは観察者の視点を示す。   FIG. 1A schematically shows an example of a surface light emitting device 1 in a plan view. The light source 3 and light from the light source 3 are taken in from one end face 2a, and the taken-in light is taken as one main face 2b. A light guide plate 2 that emits light from the entire surface, and a light-transmitting decorative sheet 5 that is disposed on the light emission side C of the light guide plate 2 are provided. In the figure, reference numeral 7 denotes, for example, a white light reflecting portion arranged on the back surface 2c side of the light guide plate 2, and E denotes the observer's viewpoint.

上記光源3は、例えば、LED(発光ダイオード)のような点光源、或いは蛍光灯やネオン管等のような線光源のいずれであってもよい。本例では後述する複数列の導光パターン6に個別に対応した位置に複数のLEDを設置している。このLEDの点灯パターンは制御部(図示せず)にて制御される。   The light source 3 may be, for example, a point light source such as an LED (light emitting diode) or a linear light source such as a fluorescent lamp or a neon tube. In this example, a plurality of LEDs are installed at positions individually corresponding to a plurality of rows of light guide patterns 6 described later. The lighting pattern of this LED is controlled by a control unit (not shown).

上記光透過性を有する化粧シート5は、例えば液晶フィルター等で構成される。化粧シート5は例えば、図1(b)に示すような木目調の柄模様4が形成されている。もちろん、柄模様4は木目に限られるものではなく、任意な形状を適宜選択自在である。   The light-transmitting decorative sheet 5 is composed of, for example, a liquid crystal filter. For example, the decorative sheet 5 has a wood grain pattern 4 as shown in FIG. Of course, the pattern 4 is not limited to the grain, and an arbitrary shape can be appropriately selected.

上記導光板2は例えばアクリル樹脂やガラス等の光透過材料で構成される。導光板2の裏面2cには、導光板2内部に入射した光を屈折または散乱させることで均一な面発光を達成するための導光パターン6が付与されている。なお導光パターン6のパターン形状は、例えば図1(c)のような波形状とされるが、これに限定されるものではなく、例えば図2(a)〜(c)に例示したような線形パターン6a、ドットパターン6b、曲線パターン6c等であってもよく、少なくとも柄模様4と一致させることが可能なパターン形状であれば、特に問わない。   The light guide plate 2 is made of a light transmitting material such as acrylic resin or glass. The back surface 2c of the light guide plate 2 is provided with a light guide pattern 6 for achieving uniform surface light emission by refracting or scattering light incident on the inside of the light guide plate 2. The pattern shape of the light guide pattern 6 is, for example, a wave shape as shown in FIG. 1C, but is not limited to this, for example, as illustrated in FIGS. 2A to 2C. The pattern may be a linear pattern 6a, a dot pattern 6b, a curved pattern 6c, or the like, and any pattern shape can be used as long as it can match at least the pattern pattern 4.

ここで、本発明においては、上記導光パターン6は、光源3が配置される一端面2a近傍を起点とし、対向する他端面を終点として、一端面2aから他端面に向かって、つまり一端面2から離れるに従って、光を屈折または散乱させる度合いが大きくなるように変化している。図1(c)に示す例では、一端面2aに近い側で疎、一端面2aから離れるに従って疎から密へと次第に変化するような面積比率となっており、これにより、一端面2aから取り入れられた光源3からの光が導光パターン6によって導光板2全体に分散されて、均一な面発光が得られるようになっている。さらに、導光パターン6のパターン形状が、図1(d)に示すように、化粧シート5の柄模様4の表示領域と正面視でほぼ重なり合うように設定されている。つまり、木目調の柄模様4の外観特徴を抽出して、その外観特徴に合わせて導光パターン6を木目調とほぼ一致する波形状の非線形パターンとしている。   Here, in the present invention, the light guide pattern 6 starts from the vicinity of the one end face 2a where the light source 3 is disposed and starts from the other end face opposite to the end face from the one end face 2a to the other end face, that is, one end face. As the distance from 2 increases, the degree of refraction or scattering of light increases. In the example shown in FIG. 1 (c), the area ratio is such that it is sparse on the side close to the one end face 2a and gradually changes from sparse to dense as it moves away from the one end face 2a. The light from the light source 3 is dispersed by the light guide pattern 6 over the entire light guide plate 2 so that uniform surface light emission can be obtained. Furthermore, the pattern shape of the light guide pattern 6 is set so as to substantially overlap the display area of the pattern 4 of the decorative sheet 5 in front view, as shown in FIG. That is, the appearance feature of the wood grain pattern 4 is extracted, and the light guide pattern 6 is made into a wave-like nonlinear pattern that substantially matches the wood tone according to the appearance feature.

なお、導光パターン6の生成方法としては、導光板2の一主面2bに、プリズム状凹凸をレーザ加工或いは成型する方法、或いは導光印刷をする方法、或いは反射フィルムを貼着する方法等、従来周知の方法を採用する。   In addition, as a generation method of the light guide pattern 6, a method of laser processing or molding a prism-shaped unevenness, a method of performing light guide printing, a method of attaching a reflective film, or the like on one main surface 2b of the light guide plate 2 A conventionally well-known method is adopted.

しかして、光源3の非点灯時には、化粧シート5の柄模様4によって面発光装置1は普通の木目調パネルの外観を呈する。一方、光源3の点灯時には、導光板2からの均一な面発光によって化粧シート5の柄模様4が光るので、木目調照明パネルとして機能するようになる。この点灯時においては、図1(d)のように導光板2に付与されている導光パターン6のパターン形状が、柄模様4の表示領域と正面視でほぼ重なり合うことによって、観察者から見て導光パターン6が柄模様4と調和するようになる。つまり、導光パターン6が柄模様4と融和することで、柄模様4の表示領域内での導光パターン6の印象を抑えることができるようになり、従って、柄模様4の輝度分布が均一となって意図した柄模様4の表現がしやすくなり、特に暗色系の表現がしやすくなり、デザイン性が向上する結果、高い装飾効果、演出効果を十分に満足させることができる。   Thus, when the light source 3 is not lit, the surface light emitting device 1 has the appearance of an ordinary woodgrain panel by the pattern 4 of the decorative sheet 5. On the other hand, when the light source 3 is turned on, the pattern 4 of the decorative sheet 5 shines by uniform surface light emission from the light guide plate 2, so that it functions as a woodgrain lighting panel. At the time of lighting, the pattern shape of the light guide pattern 6 applied to the light guide plate 2 as shown in FIG. Thus, the light guide pattern 6 is in harmony with the pattern 4. That is, since the light guide pattern 6 is integrated with the pattern 4, the impression of the light guide pattern 6 in the display area of the pattern 4 can be suppressed. Therefore, the luminance distribution of the pattern 4 is uniform. As a result, it becomes easy to express the intended pattern 4 and, in particular, it becomes easy to express dark colors, and as a result of improving the design, it is possible to sufficiently satisfy the high decorative effect and the production effect.

また、柄模様4の外観特徴と一致するように導光パターン6のパターン形状を設定するだけで導光パターン6の印象を緩和できるものであり、そのうえ、光拡散用シートを介在させる必要がないため、光の減衰、反射、吸収等が発生することもないため、低コストで、導光板2の発光面輝度(照明性能)を向上させることができる利点もある。   In addition, the impression of the light guide pattern 6 can be alleviated simply by setting the pattern shape of the light guide pattern 6 so as to match the appearance characteristics of the pattern 4, and there is no need to interpose a light diffusion sheet. Therefore, there is no light attenuation, reflection, absorption, etc., and there is an advantage that the light emitting surface luminance (illumination performance) of the light guide plate 2 can be improved at low cost.

本発明の面発光装置1は、照明を必要とする表示体の分野に広い範囲で採用可能である。   The surface light emitting device 1 of the present invention can be used in a wide range in the field of display bodies that require illumination.

(a)は本発明の一実施形態に用いる面発光装置の構造を模式的に示した平面図であり、(b)は同上の光透過性を有する化粧シートの木目調の柄模様を正面からみた模式図であり、(c)は同上の導光板に付与された導光パターンを正面からみた模式図であり、(d)は同上の導光パターンと柄模様とが重なり合った状態を正面からみた模式図である。(A) is the top view which showed typically the structure of the surface light-emitting device used for one Embodiment of this invention, (b) is the grain pattern from the front of the decorative sheet | seat which has the light transmittance same as the above. (C) is the schematic diagram which looked at the light guide pattern provided to the light guide plate same as the above from the front, and (d) is the state where the light guide pattern and the handle pattern overlapped from the front. It is the seen schematic diagram. (a)〜(c)は同上の導光パターンの他例を説明する模式図である。(A)-(c) is a schematic diagram explaining the other example of a light guide pattern same as the above. 従来例を示し、(a)は木目調の柄模様を正面からみた模式図であり、(b)は線形の導光パターンを正面からみた模式図であり、(c)は線形の導光パターンと木目調の柄模様とが不一致となる状態を正面からみた模式図、(d)は柄模様の表示領域の暗部と明部を説明する模式図である。A conventional example is shown, (a) is a schematic view of a woodgrain pattern from the front, (b) is a schematic view of a linear light guide pattern from the front, and (c) is a linear light guide pattern. FIG. 6D is a schematic diagram viewed from the front where the pattern pattern does not match the woodgrain pattern, and FIG. 6D is a schematic diagram illustrating a dark part and a bright part of the display area of the pattern pattern.

符号の説明Explanation of symbols

1 面発光装置
2 導光板
2a 一端面
2b 一主面
3 光源
4 柄模様
5 化粧シート
6 導光パターン
C 出射側
DESCRIPTION OF SYMBOLS 1 Surface light-emitting device 2 Light guide plate 2a One end surface 2b One main surface 3 Light source 4 Pattern pattern 5 Cosmetic sheet 6 Light guide pattern C Output side

Claims (1)

一端面から入射した光源からの光を一主面から出射して面発光させる導光板と、導光板の出射側に重ね合わせて配置される光透過性の化粧シートとを備え、導光板の面発光により化粧シートに光を透過させて化粧シートの柄模様を浮き上がらせる面発光装置であって、前記光源からの光が導光板全体に分散して導光板が均一に面発光するように、前記導光板の一主面に、入射面となる一端面に近い側で疎、前記一端面から離れるに従って疎から密へと次第に変化する面積比率となって、前記一端面近傍を起点にして該一端面から離れるに従って光源からの光を屈折または散乱させる度合いを大きくす導光パターンを付与すると共に、前記導光パターンのパターン形状を正面視で前記化粧シートの柄模様の表示領域ほぼ重なり合うと共に一部が前記表示領域からはみ出すように設定したことを特徴とする面発光装置。 A light guide plate that emits light from a light source incident from one end surface and emits light from one main surface; and a light-transmitting decorative sheet that is disposed to overlap the light emission side of the light guide plate, the surface of the light guide plate A surface light-emitting device that transmits light to a decorative sheet by light emission and raises a pattern of the decorative sheet, wherein the light from the light source is dispersed over the entire light guide plate so that the light guide plate emits light uniformly. The surface ratio of the light guide plate is sparse on the side near the one end surface that is the entrance surface , and gradually changes from sparse to dense as it is away from the one end surface. with conferring increased to that the light guide pattern of the degree to refract or scatter light from the light source as the distance from the end face, substantially overlaps with the display area of the handle pattern of the decorative sheet a pattern shape in a front view of the light guide pattern one There area light emitting device characterized by being configured to protrude from the display area.
JP2007248104A 2007-09-25 2007-09-25 Surface emitting device Expired - Fee Related JP4966146B2 (en)

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JP3166321U (en) * 2010-09-08 2011-03-03 一人 羽生 Plate glass processed by enclosing air
JP5102895B2 (en) * 2011-09-08 2012-12-19 一人 羽生 Luminescent decorative glass, decorative glass and method and apparatus for manufacturing the same
KR101684004B1 (en) * 2014-11-25 2016-12-08 현대자동차주식회사 Light source module of lamp for vehicle
KR102027493B1 (en) * 2017-02-06 2019-10-01 박명옥 Interior lighting using paper craft
JP6982830B2 (en) * 2017-11-29 2021-12-17 パナソニックIpマネジメント株式会社 Lighting equipment and manufacturing method of lighting equipment
JP7241278B2 (en) * 2019-03-08 2023-03-17 パナソニックIpマネジメント株式会社 Lighting device and method for manufacturing lighting device
JP7285447B2 (en) * 2019-06-11 2023-06-02 パナソニックIpマネジメント株式会社 Lighting device and method for manufacturing lighting device

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JP4470388B2 (en) * 2003-04-16 2010-06-02 凸版印刷株式会社 Light guide plate, illumination device using the same, and display device
JP4434120B2 (en) * 2005-09-30 2010-03-17 豊田合成株式会社 Light source device

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