JP2008122798A - Plane light emission display apparatus - Google Patents

Plane light emission display apparatus Download PDF

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JP2008122798A
JP2008122798A JP2006308230A JP2006308230A JP2008122798A JP 2008122798 A JP2008122798 A JP 2008122798A JP 2006308230 A JP2006308230 A JP 2006308230A JP 2006308230 A JP2006308230 A JP 2006308230A JP 2008122798 A JP2008122798 A JP 2008122798A
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light
phosphorescent
guide plate
sheet
light guide
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Yasuhiro Kobayashi
康弘 小林
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a plane light emission display apparatus which is improved so that brightness after electrical light emitting disappears is further boosted. <P>SOLUTION: In a place where the plane light emission display apparatus 1 including a light emitting source 7 for electrically emitting light, and a light guide plate 4 for guiding the light emitted by the light emitting source overlooks both front and rear faces of the light guide plate, phosphorescent sheets 3, 5 and 6 with half-translucency, having a light storage layer by light storage pigment which looks white or approximately white under visible light, are arranged. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は、面発光表示装置に関し、特に、電気的な光源の発光が消滅した際にも表示面の発光を確保し得る面発光表示装置に関するものである。   The present invention relates to a surface-emitting display device, and more particularly to a surface-emitting display device that can ensure light emission on a display surface even when light emission from an electrical light source is extinguished.

電気的な光源が端縁に配置された導光板の背面に蓄光シートと反射板とを重ね合わせ、電力の供給が断たれて光源の発光が消滅した際に、蓄光シートの発する光を液晶表示パネルのバックライトとして用いる面発光ユニットが知られている（特許文献１を参照されたい）。
特許第３１９６８７０号公報 The phosphorescent sheet and reflector are superimposed on the back of the light guide plate where the electrical light source is arranged at the edge, and when the power supply is cut off and the light emission of the light source disappears, the light emitted by the phosphorescent sheet is displayed in a liquid crystal display 2. Description of the Related Art A surface light emitting unit used as a panel backlight is known (see Patent Document 1).
Japanese Patent No. 3196870

文献１に記載された蓄光シートの輝度を高め、且つ残光時間を長くするには、蓄光材の量を多くしなければならない。即ち、蓄光顔料を塗布して形成する塗膜を厚くする必要がある。しかし塗膜が厚くなると、塗膜の深部への光の入射が不十分となるために深部の蓄光材を励起できなくなり、結局のところ、期待したほどに輝度を高め、且つ残光時間を長くすることはできない。   In order to increase the luminance of the phosphorescent sheet described in Document 1 and to increase the afterglow time, the amount of phosphorescent material must be increased. That is, it is necessary to thicken the coating film formed by applying the phosphorescent pigment. However, as the coating becomes thicker, light is not sufficiently incident on the deep part of the coating, which makes it impossible to excite the phosphorescent material in the deep part. I can't do it.

つまりこの従来の構成によると、実際のところ実用に供するのに十分な輝度が得られるものを提供できるとは言い難い面があった。   That is, according to this conventional configuration, it is difficult to say that it is actually possible to provide a luminance that is sufficient for practical use.

このような従来技術の不都合に鑑み、本発明の主な目的は、電気的な発光が消滅した後の輝度をより一層高めることができると共に残光時間をより一層長くすることができるように改良された面発光表示装置を提供することにある。   In view of such disadvantages of the prior art, the main object of the present invention is to improve the luminance after the electric light emission is extinguished and to further increase the afterglow time. Another object of the present invention is to provide a surface emitting display device.

このような課題を解決するため、本発明は、電気的に発光する発光源７と、発光源が発する光を導く導光板４とを有する面発光表示装置１を、前記導光板の表裏各面を臨む位置に、半透光性を有すると共に、可視光下で白色または近似白色を呈する蓄光顔料による蓄光層を有する蓄光シート３・５が配置されていることを特徴とするものとした。特に、前記導光板の少なくとも一方の面に、光を拡散乱反射させる処理を施すと良く、またマークや文字を印刷した表面表示シート２を前記蓄光シートに重ね合わせて設けると良い。   In order to solve such a problem, the present invention provides a surface-emitting display device 1 having a light emitting source 7 that emits light electrically and a light guide plate 4 that guides light emitted from the light source. The phosphorescent sheets 3 and 5 having a phosphorescent layer made of a phosphorescent pigment having a semi-translucency and exhibiting a white color or an approximate white color under visible light are disposed at a position facing the surface. In particular, at least one surface of the light guide plate is preferably subjected to diffused diffuse reflection, and a surface display sheet 2 on which marks and characters are printed is preferably overlapped with the phosphorescent sheet.

このような本発明によれば、可視光の下で白色または近似白色を呈する蓄光顔料を用いた蓄光シートを導光板の両面に配することにより、電気的光源が発光している時は蓄光面を反射面としても利用できるので、導光板内に封じ込める光量を多くして励起エネルギを蓄光材に十分に与えることができる。これにより、表面の半透光性蓄光シートが発する光と、背面の蓄光シートが発して表面の蓄光シートを経て表側へ出る光とが相俟って、輝度が大幅に高くなると共に、残光時間が長くなる。   According to the present invention, the phosphorescent sheet using the phosphorescent pigment exhibiting white or approximate white under visible light is arranged on both sides of the light guide plate, so that the phosphorescent surface is used when the electrical light source emits light. Can also be used as a reflecting surface, so that the amount of light confined in the light guide plate can be increased to sufficiently provide excitation energy to the phosphorescent material. As a result, the light emitted from the translucent phosphorescent sheet on the surface and the light emitted from the rear phosphorescent sheet and emitted to the front side through the surface phosphorescent sheet are combined to greatly increase the luminance and the afterglow. The time will be longer.

以下に添付の図面を参照して本発明について詳細に説明する。   Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

図１は、本発明に基づき構成された面発光表示装置の第１実施形態を示す縦断面図である。この面発光表示装置１は、表面表示シート２と、表面側蓄光シート３と、導光板４と、主蓄光シート５と、背面側蓄光シート６とをこの順に積層してなると共に、導光板４の外周端縁を臨む位置に電気的発光源７を配設してなっている。これらは、例えば高輝度ＬＥＤからなる発光源７のホルダを兼ねるフレーム８にてその積層状態が保持されている。   FIG. 1 is a longitudinal sectional view showing a first embodiment of a surface-emitting display device constructed according to the present invention. The surface-emitting display device 1 is formed by laminating a surface display sheet 2, a surface side phosphorescent sheet 3, a light guide plate 4, a main phosphorescent sheet 5, and a back side phosphorescent sheet 6 in this order. The electroluminescent light source 7 is disposed at a position facing the outer peripheral edge. These layers are held in a laminated state by a frame 8 that also serves as a holder of a light emitting source 7 made of, for example, a high-intensity LED.

表面表示シート２は、例えば透明の樹脂フィルムに文字やマーク等を印刷したものであり、用途に応じて交換可能なように構成されている。   The surface display sheet 2 is formed by, for example, printing characters or marks on a transparent resin film, and is configured to be exchangeable depending on the application.

導光板４は、例えば透明のアクリル樹脂材にて形成された平板からなり、その一方の面（背面側）は、微細な凹凸が形成された粗面とされており、これにより、外周端縁から入射した光を導光板４の内部で拡散乱反射させ、導光板４の表面の輝度分布の均一化を図っている。なお、光を拡散乱反射させるための処理としては、梨地加工及びレザーカット加工又、ダイヤモンドカットなどの周知の手法を、要求される輝度や用途に応じて適宜に適用できる。   The light guide plate 4 is formed of a flat plate made of, for example, a transparent acrylic resin material, and one surface (rear side) thereof is a rough surface on which fine irregularities are formed. Is diffused and diffusely reflected inside the light guide plate 4 to make the luminance distribution on the surface of the light guide plate 4 uniform. In addition, as a process for diffusely reflecting light diffusely, a well-known technique such as a satin finish, a leather cut, or a diamond cut can be appropriately applied according to required luminance and usage.

表面側蓄光シート３並びに背面側蓄光シート６は、基本的に同一のもので良く、透明な樹脂メディウムに微粉末の蓄光材を混練した蓄光塗料を、透明な樹脂フィルムの表面側、背面側、あるいは両面に、スプレーによる吹き付け、あるいはシルクスクリーン印刷にて塗布したもの、あるいは、溶融樹脂材に蓄光材を混練して硬化させた薄板材からなっている。   The surface-side phosphorescent sheet 3 and the back-side phosphorescent sheet 6 may be basically the same, and a phosphorescent paint obtained by kneading a fine powder phosphorescent material in a transparent resin medium is used for the surface side, the back side, and the transparent resin film. Or it consists of the thin plate material which knead | mixed and hardened the phosphorescent material to the molten resin material, or the thing apply | coated by spraying or silkscreen printing on both surfaces.

これら２つの蓄光シート３・６は、導光板４の表面並びに背面から出る光の一部を反射して再度導光板４内に戻せるように、可視光下で白色を呈し、且つ励起時に白色に近似する発光色を呈する蓄光顔料を塗布したものが好ましく、しかもある程度の透光性を確保し得る半透明とするために、顔料の塗布量は３００ｇ／ｍ２以下とすることが好ましい。特に表面側蓄光シート３を可視光下で白色を呈するものとし、且つある程度高い透光性を持つものとすることにより、発光源７の点灯時に表面表示シート２の発色を妨げず、綺麗で鮮明な表示を実現することができる。 These two phosphorescent sheets 3 and 6 are white under visible light and white when excited so that a part of the light emitted from the front and back surfaces of the light guide plate 4 can be reflected back into the light guide plate 4 again. What applied the phosphorescent pigment which exhibits the light emission color which approximates is preferable, and in order to make it translucent which can ensure a certain amount of translucency, it is preferable that the application quantity of a pigment shall be 300 g / m < 2 > or less. In particular, the surface-side phosphorescent sheet 3 is white under visible light and has a certain degree of translucency, so that the color of the surface display sheet 2 is not disturbed when the light source 7 is turned on, and is clean and clear. Display can be realized.

主蓄光シート５は、上述の表面側並びに背面側蓄光シート３・６と基本的に同様なものであり、透明な樹脂メディウムに微粉末の蓄光材を混練した蓄光塗料を、基材となる透明な樹脂フィルムあるいは樹脂薄板の表面側、背面側、あるいは両面に、スプレーによる吹き付け、あるいはシルクスクリーン印刷にて塗布したもの、あるいは、溶融樹脂材に蓄光材を混練して硬化させた板材からなっている。この主蓄光シート５の発光色は、緑色、黄色又は黄緑色など、市販の蓄光材から適宜に選択できる。また主蓄光シート５の両面に異なる発光色の蓄光顔料を塗布すれば、混色によるカラー発光の演出効果を最大限に生かすことができる。なお、主蓄光シート５における蓄光顔料の使用量は、７００ｇ／ｍ２〜８００ｇ／ｍ２が好適である。 The main phosphorescent sheet 5 is basically the same as the above-mentioned front-side and back-side phosphorescent sheets 3 and 6, and a phosphorescent paint in which a fine powder phosphorescent material is kneaded with a transparent resin medium is used as a base material. Made of sprayed or silkscreen printed on the surface, back or both sides of a thin resin film or resin thin plate, or a plate material obtained by kneading and curing a phosphorescent material in a molten resin material Yes. The light emission color of the main phosphorescent sheet 5 can be appropriately selected from commercially available phosphorescent materials such as green, yellow or yellowish green. Moreover, if the phosphorescent pigments of different emission colors are applied on both surfaces of the main phosphorescent sheet 5, the effect of color emission due to the color mixture can be maximized. Incidentally, the amount of the phosphorescent pigment in the main phosphorescent sheet 5, 700g / m 2 ~800g / m 2 are preferred.

このように、導光板４の各面のそれぞれを臨むように２つの半透明の白色蓄光シート３・６を配することにより、表面側および背面側の両蓄光シート３・６間で発光源７の発する光を相互に反射させ、あたかも導光板４内に光の一部を封じ込めるかのような作用を発揮し得る。これにより、主蓄光シート５の蓄光材を最大限に励起し且つ光エネルギを蓄えさせ、発光源７が消灯した際の高輝度化および残光時間の長大化に大きく貢献することができる。また表面側蓄光シート３を白色発光させることにより、主蓄光シート５の発色をより一層鮮明にすることに寄与し得る。   In this way, by arranging the two translucent white phosphorescent sheets 3 and 6 so as to face the respective surfaces of the light guide plate 4, the light emitting source 7 is provided between the phosphorescent sheets 3 and 6 on the front side and the back side. The light emitted from each other can be reflected from each other, and an effect can be obtained as if a part of the light is contained in the light guide plate 4. Thereby, the phosphorescent material of the main phosphorescent sheet 5 is excited to the maximum and the light energy is stored, which can greatly contribute to the increase in luminance and the length of the afterglow time when the light emission source 7 is turned off. Moreover, it can contribute to making the coloring of the main luminous sheet 5 clearer by making the front side luminous sheet 3 emit white light.

図２は、本発明による面発光表示装置の第２の実施形態である。この面発光表示装置２１においては、中央に導光板２４を置き、その各面に上述の主蓄光シート５に相当する蓄光シート２５ａ・２５ｂをそれぞれ重ね合わせ、さらに各蓄光シート２５ａ・２５ｂの各外面に、表面表示シート２２ａ・２２ｂをそれぞれ重ね合わせている。導光板２４の外周端縁を臨む位置に電気的発光源２７を配置する点は、第１の実施形態と同様である。   FIG. 2 is a second embodiment of a surface-emitting display device according to the present invention. In this surface light emitting display device 21, a light guide plate 24 is placed in the center, and light storage sheets 25a and 25b corresponding to the above-mentioned main light storage sheet 5 are superimposed on each surface, and each outer surface of each light storage sheet 25a and 25b. Further, the surface display sheets 22a and 22b are superposed on each other. The point that the electroluminescent light source 27 is disposed at a position facing the outer peripheral edge of the light guide plate 24 is the same as in the first embodiment.

これによれば、文字やマーク等を両面に表示し得るように面発光表示装置が構成されるので、通路の途中などに両側から見えるように設ける案内標識などに好適である。またこれの場合は、拡散乱反射させるための表面処理を、導光板２４の両面に施すと良い。   According to this, the surface light emitting display device is configured so that characters, marks, etc. can be displayed on both sides, which is suitable for a guide sign provided so as to be visible from both sides in the middle of a passage. In this case, surface treatment for diffused diffuse reflection may be performed on both surfaces of the light guide plate 24.

図３は、本発明による面発光表示装置の第３の実施形態である。この面発光表示装置３１においては、中央に主蓄光シート３５を置き、その各面に導光板３４ａ・３４ｂをそれぞれ置き、さらに各導光板３４ａ・３４ｂの各外面に、蓄光シート３３ａ・３３ｂと表面表示シート３２ａ・３２ｂとをそれぞれ配置している。これの場合は、２つの導光板３４ａ・３４ｂのそれぞれの外周端縁を臨む位置に電気的光源３７ａ・３７ｂを配置すると良い。またこれの場合は、拡散乱反射させるための表面処理を、各導光板３４ａ・３４ｂの主蓄光シート３５を臨む面にそれぞれ施すと良い。   FIG. 3 is a third embodiment of a surface-emitting display device according to the present invention. In this surface light emitting display device 31, the main phosphorescent sheet 35 is placed in the center, the light guide plates 34a and 34b are placed on the respective surfaces, and the phosphorescent sheets 33a and 33b and the surface are placed on the outer surfaces of the respective light guide plates 34a and 34b. Display sheets 32a and 32b are arranged respectively. In this case, the electrical light sources 37a and 37b are preferably arranged at positions facing the outer peripheral edges of the two light guide plates 34a and 34b. In this case, surface treatment for diffused diffuse reflection may be performed on the surfaces of the light guide plates 34a and 34b facing the main phosphorescent sheet 35.

図４は、本発明による面発光表示装置の第４の実施形態である。この面発光表示装置４１においては、中央に表示シート４２を置き、主蓄光シート４５ａ・４５ｂ、導光板４４ａ・４４ｂ、半透過半反射蓄光シート４３ａ・４３ｂを、この順で表示シート４２の各面に重ね合わせている。これの場合も、第３の実施形態と同様に、２つの導光板４４ａ・４４ｂのそれぞれの外周端縁を臨む位置に電気的光源４７ａ・４７ｂを配置し、拡散乱反射させるための表面処理を、各導光板４４ａ・４４ｂの主蓄光シート４５ａ・４５ｂを臨む面にそれぞれ施すと良い。   FIG. 4 is a fourth embodiment of a surface-emitting display device according to the present invention. In this surface light emitting display device 41, a display sheet 42 is placed at the center, and main light storage sheets 45a and 45b, light guide plates 44a and 44b, and transflective and semi-reflection light storage sheets 43a and 43b are arranged in this order on each surface of the display sheet 42. It is superimposed on. Also in this case, as in the third embodiment, the electrical light sources 47a and 47b are arranged at positions facing the outer peripheral edges of the two light guide plates 44a and 44b, and surface treatment for diffusely reflecting diffusely is performed. The light guide plates 44a and 44b may be provided on the surfaces facing the main phosphorescent sheets 45a and 45b, respectively.

なお、発光源としてはＬＥＤに限定されず、冷陰極管又は、白色光に近似する蛍光灯を等しく適用可能である。また、発光源は、導光板の外周の全周に渡って配置することが好ましいが、発光面の面積、用途、および要求される輝度などに応じて適宜に配置しても良い。さらに、フレームを用いて積層状態を保持するものに限らず、接着剤を用いて互いに一体的に接合しても良い。   Note that the light source is not limited to the LED, and a cold cathode tube or a fluorescent lamp approximating white light is equally applicable. The light source is preferably disposed over the entire outer periphery of the light guide plate, but may be appropriately disposed according to the area of the light emitting surface, the application, the required luminance, and the like. Furthermore, the laminated state is not limited to that using a frame, and may be integrally joined to each other using an adhesive.

本発明にかかる面発光表示装置は、停電などで照明が消灯した際に自己発光して表示を継続させる機能を有しており、発光看板や、建物や地下通路などの案内標識として有用である。   The surface light-emitting display device according to the present invention has a function of continuing to display by self-emission when the illumination is turned off due to a power failure or the like, and is useful as a light-emitting signboard or a guide sign for buildings, underground passages, and the like. .

本発明装置の第１の実施形態の概略構成を示す縦断面図である。It is a longitudinal cross-sectional view which shows schematic structure of 1st Embodiment of this invention apparatus. 本発明装置の第２の実施形態の概略構成を示す縦断面図である。It is a longitudinal cross-sectional view which shows schematic structure of 2nd Embodiment of this invention apparatus. 本発明装置の第３の実施形態の概略構成を示す縦断面図である。It is a longitudinal cross-sectional view which shows schematic structure of 3rd Embodiment of this invention apparatus. 本発明装置の第４の実施形態の概略構成を示す縦断面図である。It is a longitudinal cross-sectional view which shows schematic structure of 4th Embodiment of this invention apparatus.

符号の説明Explanation of symbols

１ 面発光表示装置
２ 表面表示シート
３ 蓄光シート
４ 導光板
５ 蓄光シート
７ 発光源 DESCRIPTION OF SYMBOLS 1 Surface emitting display apparatus 2 Surface display sheet 3 Phosphorescent sheet 4 Light guide plate 5 Phosphorescent sheet 7 Light emission source

Claims (3)

電気的に発光する光源と、該光源が発する光を導く導光板とを有する面発光表示装置であって、
前記導光板の表裏各面を臨む位置に、半透光性を有すると共に、可視光下で白色または近似白色を呈する蓄光顔料による蓄光層を有する蓄光シートが配置されることを特徴とする面発光表示装置。 A surface-emitting display device having a light source that emits light electrically, and a light guide plate that guides light emitted from the light source,
A surface light emission characterized in that a phosphorescent sheet having a phosphorescent layer made of a phosphorescent pigment having a semi-translucency and exhibiting a white color or an approximate white color under visible light is disposed at a position facing the front and back surfaces of the light guide plate. Display device. 前記導光板の少なくとも一方の面に、光を拡散乱反射させる処理が施されることを特徴とする請求項１に記載の面発光表示装置。   The surface-emitting display device according to claim 1, wherein at least one surface of the light guide plate is subjected to a diffuse diffuse reflection process. マークや文字を印刷した表面表示シートが、前記蓄光シートに重ね合わされることを特徴とする請求項１若しくは２に記載の面発光表示装置。   The surface-emitting display device according to claim 1, wherein a surface display sheet on which marks and characters are printed is superimposed on the phosphorescent sheet.
JP2006308230A 2006-11-14 2006-11-14 Plane light emission display apparatus Pending JP2008122798A (en)

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JP2008180989A (en) * 2007-01-25 2008-08-07 Sekisui Jushi Co Ltd Internally illuminated sign
JP2010151876A (en) * 2008-12-24 2010-07-08 Hiraoka & Co Ltd Light emitting display body for sign, light emitting display body system for sign having emergency light function, and illumination method of the same
JP2010151877A (en) * 2008-12-24 2010-07-08 Hiraoka & Co Ltd Light emitting display body for sign, light emitting display body system for sign having emergency light function, and illumination method of the same
WO2011029999A1 (en) * 2009-09-10 2011-03-17 Marimils Oy Illuminated sign and illuminated sign system
GB2499894A (en) * 2012-02-08 2013-09-04 Saf T Glo Ltd Photoluminescent and edge-lit illuminated sign, e.g. for emergency exit sign for aircraft
JP2016012025A (en) * 2014-06-27 2016-01-21 株式会社ゼットネット Light storage structure, and road sign and evacuation guidance sign using the same
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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008180989A (en) * 2007-01-25 2008-08-07 Sekisui Jushi Co Ltd Internally illuminated sign
JP2010151876A (en) * 2008-12-24 2010-07-08 Hiraoka & Co Ltd Light emitting display body for sign, light emitting display body system for sign having emergency light function, and illumination method of the same
JP2010151877A (en) * 2008-12-24 2010-07-08 Hiraoka & Co Ltd Light emitting display body for sign, light emitting display body system for sign having emergency light function, and illumination method of the same
WO2011029999A1 (en) * 2009-09-10 2011-03-17 Marimils Oy Illuminated sign and illuminated sign system
GB2499894A (en) * 2012-02-08 2013-09-04 Saf T Glo Ltd Photoluminescent and edge-lit illuminated sign, e.g. for emergency exit sign for aircraft
GB2499894B (en) * 2012-02-08 2017-05-03 Saf-T-Glo Ltd Edge lit sign with photoluminescent back lighting
JP2016012025A (en) * 2014-06-27 2016-01-21 株式会社ゼットネット Light storage structure, and road sign and evacuation guidance sign using the same
US20180226003A1 (en) * 2015-02-13 2018-08-09 Astra Capital Incorporated Hybrid illuminated indicator sign
US10679528B2 (en) 2015-02-13 2020-06-09 Ecoglo Holdings Na Inc. Hybrid illuminated indicator sign

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