JP2010231981A - Surface light-emitting panel with pronunciation function - Google Patents

Surface light-emitting panel with pronunciation function Download PDF

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JP2010231981A
JP2010231981A JP2009077669A JP2009077669A JP2010231981A JP 2010231981 A JP2010231981 A JP 2010231981A JP 2009077669 A JP2009077669 A JP 2009077669A JP 2009077669 A JP2009077669 A JP 2009077669A JP 2010231981 A JP2010231981 A JP 2010231981A
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light guide
guide plate
light
vibrator
back surface
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JP5144574B2 (en
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Tatsuji Ono
達司 大野
Hideki Koizumi
秀樹 小泉
Toshihiro Tanaka
敏裕 田中
Hideki Tanaka
秀基 田中
Takashi Sakuma
崇 佐久間
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Panasonic Electric Works Co Ltd
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Panasonic Electric Works Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a light guide plate, capable of omitting a diaphragm at the time of light-emitting and pronunciation and hardly seeing a vibrator from a front section, even if the vibrator is directly fixed on a back face of the light guide plate. <P>SOLUTION: A surface light-emitting panel 1 with a pronunciation function has the light guide plate 2 for making the light of a light source 4 incident from a part of an outer peripheral end face and making the incident light emit from a front section 21, by diffusely reflecting to a diffusion reflection section 24 arranged on a back face section 22, and the vibrator 3 for exciting the light guide plate 2. The vibrator 3 is arranged at a section on a back face of the light guide plate 2, where the diffusion reflection section 24 is formed. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

本発明は、導光板に関するものであり、詳しくは、発音機能付き面発光パネルに関するものである。   The present invention relates to a light guide plate, and more particularly to a surface light emitting panel with a sound generation function.

従来から、パネル状の導光板２ａのいずれかの端部を光源４からの光を導入するための入射端面部２３ａとした、いわゆるエッジライト方式の導光板２ａを用いたパネル装置１ａが知られている。例えば、図３に示すようなパネル装置１ａは、導光板２ａの入射端面部２３ａにＬＥＤから成る光源４を設けることで構成される。この導光板２ａは、導光板２ａの裏面に複数の導光パターンから成る拡散反射部２４ａを設け、入射端面部２３ａから入射して導光板２ａ内において反射を繰り返して伝播する光をこの拡散反射部２４ａによって導光板２ａの前面部から出射させ、導光板２ａの前面部を面状に発光させるものである。なお、図中６ａは枠部を示している。   2. Description of the Related Art Conventionally, a panel device 1a using a so-called edge light type light guide plate 2a in which one end portion of a panel-shaped light guide plate 2a is an incident end surface portion 23a for introducing light from a light source 4 is known. ing. For example, the panel device 1a as shown in FIG. 3 is configured by providing the light source 4 made of LEDs on the incident end face portion 23a of the light guide plate 2a. The light guide plate 2a is provided with a diffuse reflection portion 24a composed of a plurality of light guide patterns on the back surface of the light guide plate 2a, and diffuses and reflects light that is incident from the incident end surface portion 23a and repeatedly propagates in the light guide plate 2a. The light is emitted from the front portion of the light guide plate 2a by the portion 24a, and the front portion of the light guide plate 2a emits light in a planar shape. In addition, 6a in the figure has shown the frame part.

ところで、このような面発光を行なうパネル装置と音響装置とを並設して、発光及び発音を同時に行なうようにすることが考えられている。   By the way, it is considered that a panel device that performs such surface light emission and an acoustic device are arranged in parallel to emit light and generate sound simultaneously.

音響装置は、例えば図４に示すようなもので、振動板８の背面に加振器３ａを固着して構成してあり、この加振器３ａによって振動板８を励振させ、音を発生させるようになっている。なお、図中６ｂは枠部を示している。   The acoustic device is, for example, as shown in FIG. 4, and is configured by fixing a vibrator 3 a to the back surface of the diaphragm 8, and the diaphragm 8 is excited by the vibrator 3 a to generate sound. It is like that. In addition, 6b in the figure has shown the frame part.

このような、パネル装置と音響装置とを並設する場合、発光装置のパネル（導光板）と音響装置のパネル（振動板）とがそれぞれ必要となり、設置場所が多く必要となるばかりか、コスト高となってしまうという問題があった。   When such a panel device and an acoustic device are arranged side by side, a panel (light guide plate) of the light emitting device and a panel (vibration plate) of the acoustic device are required, which not only requires a lot of installation space but also costs. There was a problem of becoming high.

そこで、上記パネル装置の導光板を音響装置の振動板として兼用するものが考えられている（例えば特許文献１参照）。この特許文献１に示されるものは、液晶パネルの背面に導光板を配設し、光源となる発光ダイオードと加振器となる圧電素子を、この導光板の一端面から突設された導光板の厚さよりも薄い突出板状部に設けたものである。   In view of this, it is conceivable to use the light guide plate of the panel device as a diaphragm of an acoustic device (see, for example, Patent Document 1). In this patent document 1, a light guide plate is disposed on the back surface of a liquid crystal panel, and a light emitting diode serving as a light source and a piezoelectric element serving as a vibrator are projected from one end surface of the light guide plate. It is provided on the protruding plate-like portion thinner than the thickness of the plate.

特開２００７−０７２０１８号公報Japanese Patent Laid-Open No. 2007-072018

ところで、面発光をさせるパネル装置について、上記構成を採用して導光板と振動板とを兼用するに当たっては、導光板の一端部から導光板よりもさらに薄い突出板状部を新たに設ける必要がある。   By the way, regarding the panel device that emits surface light, when the above-described configuration is adopted and the light guide plate and the vibration plate are combined, it is necessary to newly provide a protruding plate-like portion that is thinner than the light guide plate from one end of the light guide plate. is there.

一方、この突出板状部を設けずに導光板の裏面に直接加振器を固着することも考えられるが、導光板は透過性を有する部材により形成されているため、裏面に固着した加振器が前面から見えてしまい見栄えが悪くなるという問題があった。   On the other hand, it is conceivable to directly attach a vibration exciter to the back surface of the light guide plate without providing the protruding plate-like portion. However, since the light guide plate is formed of a transparent member, There was a problem that the container could be seen from the front and looked bad.

本発明は、上記従来の問題に鑑みてなされたものであり、その目的とするところは、導光板による発光及び発音をするものにおいて導光板と振動板とを兼用でき、しかも、導光板の裏面に直接加振器を固着した場合であっても、見栄えが低下することのない発音機能付き面発光パネルを提供することにある。   The present invention has been made in view of the above-described conventional problems, and an object of the present invention is to use both the light guide plate and the vibration plate in the light emission and sound generation by the light guide plate, and the back surface of the light guide plate. It is an object of the present invention to provide a surface emitting panel with a sound generation function that does not deteriorate the appearance even when a vibrator is directly fixed to the screen.

上記課題を解決するために本発明は以下の構成を備えている。   In order to solve the above problems, the present invention has the following configuration.

すなわち、請求項１に係る発明にあっては、外周端面の一部から光源４による光を入射させ該入射した光を裏面部２２に設けた拡散反射部２４に乱反射させて前面部２１から出射させる導光板２と、導光板２を励振させる加振器３と、を備えた発音機能付き面発光パネル１である。この導光板２裏面における拡散反射部２４が形成されている部位に加振器３を設けた。   That is, in the invention according to claim 1, light from the light source 4 is incident from a part of the outer peripheral end surface, and the incident light is diffusely reflected on the diffuse reflection portion 24 provided on the back surface portion 22 and emitted from the front surface portion 21. The surface emitting panel 1 with a sound generation function includes a light guide plate 2 to be excited and a vibrator 3 for exciting the light guide plate 2. The vibration exciter 3 is provided at a portion where the diffuse reflection portion 24 is formed on the rear surface of the light guide plate 2.

このように構成したことにより、この導光板２の外周端面の一部に光源４からの光を入射させると、加振器３が設けられている部位において入射光が乱反射して面状に発光するため、導光板２の裏面に加振器３を設けた場合であっても、加振器３が前面から見えることがなくなり、見栄えを損なうことがない。その上、導光板２を振動板として兼用することができるようになり、コストダウンを図ることができると共に、狭いスペース内に発音と発光とを行なうことができる面発光パネルを設けることができる。   With this configuration, when light from the light source 4 is incident on a part of the outer peripheral end face of the light guide plate 2, the incident light is irregularly reflected at a portion where the vibrator 3 is provided and is emitted in a planar shape. Therefore, even when the vibrator 3 is provided on the back surface of the light guide plate 2, the vibrator 3 is not seen from the front surface, and the appearance is not impaired. In addition, the light guide plate 2 can also be used as a diaphragm, so that the cost can be reduced and a surface light emitting panel capable of sound generation and light emission can be provided in a narrow space.

また、請求項２に係る発明にあっては、請求項１に係る発明において、前記拡散反射部２４は、導光板２の裏面部２２において部分的に設けられた導光パターン２４１を複数箇所に設けることで構成してある。   Moreover, in the invention which concerns on Claim 2, in the invention which concerns on Claim 1, the said diffuse reflection part 24 has the light guide pattern 241 partially provided in the back surface part 22 of the light-guide plate 2 in multiple places. It is configured by providing.

このように構成したことにより、導光板２の前面部２１から出射する光を部分的に変化させるように構成することができ、多様な種類の面状発光を行なうことができる。   With this configuration, the light emitted from the front surface portion 21 of the light guide plate 2 can be partially changed, and various types of planar light emission can be performed.

本発明によれば、導光板を振動板として兼用することができるため、コストダウンを図ることができ、しかも、加振器が導光板の前面部から見えてしまうことがなくなり、見栄えを損なってしまうことを回避できる。その上、導光板の裏面に拡散反射部を介して加振器を固着するだけで良いため、新たに加振器を設けるための部位を設ける必要がなく、構造の簡略化を図ることができると共に製造コストの低減を図ることができる。   According to the present invention, since the light guide plate can also be used as a vibration plate, the cost can be reduced, and the vibrator is not seen from the front portion of the light guide plate, which deteriorates the appearance. Can be avoided. In addition, since it is only necessary to fix the vibrator to the back surface of the light guide plate via the diffuse reflection part, it is not necessary to provide a part for newly providing the vibrator, and the structure can be simplified. At the same time, the manufacturing cost can be reduced.

本発明の一実施形態のパネル装置の要部断面の概略図である。It is the schematic of the principal part cross section of the panel apparatus of one Embodiment of this invention. 同上の導光板の背面図であり（ａ）は本実施形態の導光板であり（ｂ）は他例の導光板である。It is a rear view of a light guide plate same as the above, (a) is a light guide plate of this embodiment, and (b) is a light guide plate of another example. 従来のパネル装置を説明するための概略図であり（ａ）は正面図であり（ｂ）は要部断面図である。It is the schematic for demonstrating the conventional panel apparatus, (a) is a front view, (b) is principal part sectional drawing. 従来の音響装置を説明するための概略図であり（ａ）は正面図であり（ｂ）は要部断面図である。It is the schematic for demonstrating the conventional acoustic apparatus, (a) is a front view, (b) is principal part sectional drawing.

以下、本発明について添付図面に基づいて説明する。   The present invention will be described below with reference to the accompanying drawings.

本実施形態の発音機能付き面発光パネル１は、図１に示すように、パネル装置に組み込まれている。このパネル装置は、発音機能付き面発光パネル１と、発音機能付き面発光パネル１のいずれかの端部（外周端面の一部）に設けられた光源４と、光源４や導光板２を固定するベース部５と、導光板２の前面の上下縁部を覆う枠部６とを備えている。   The surface emitting panel 1 with a sound generation function of the present embodiment is incorporated in a panel device as shown in FIG. This panel device fixes a surface light emitting panel 1 with a sound generation function, a light source 4 provided at one end (a part of an outer peripheral end surface) of the surface light emission panel 1 with a sound generation function, a light source 4 and a light guide plate 2. And a frame 6 that covers the upper and lower edges of the front surface of the light guide plate 2.

発音機能付き面発光パネル１は、エッジライト方式の導光板２と、導光板２の裏面に設けられ導光板２を励振させる加振器３とを備えている。   The surface emitting panel 1 with a sound generation function includes an edge light type light guide plate 2 and a vibrator 3 provided on the back surface of the light guide plate 2 to excite the light guide plate 2.

この導光板２は、光の出射面となる前面部２１（厚み方向を向く一面）と、裏面部２２（厚み方向を向く他面）と、導光板２のいずれかの端面であり（本実施形態では上端）光源４からの光を導入する入射端面部２３とを備えている。本実施形態の導光板２は、無色透明なアクリル樹脂にて構成されている。裏面部２２には拡散反射部２４が設けられており、入射端面部２３から入射して導光板２内において反射を繰り返して伝播する光の一部を、この拡散反射部２４により拡散乱反射させて、導光板２の前面部２１から出射させることができる。   The light guide plate 2 is one of end surfaces of the front surface portion 21 (one surface facing the thickness direction), the back surface portion 22 (the other surface facing the thickness direction), and the light guide plate 2 (this embodiment). In the embodiment, an upper end) and an incident end face portion 23 for introducing light from the light source 4 are provided. The light guide plate 2 of the present embodiment is made of a colorless and transparent acrylic resin. A diffuse reflection portion 24 is provided on the back surface portion 22, and a part of light that is incident from the incident end face portion 23 and repeatedly propagates in the light guide plate 2 is diffusely diffusely reflected by the diffuse reflection portion 24. The light can be emitted from the front surface portion 21 of the light guide plate 2.

拡散反射部２４は、導光板２の裏面部２２において部分的に設けられた導光パターン２４１を複数箇所に設けることで構成してある。この導光パターン２４１は、拡散性を有する白色インクなどをドット印刷して形成されている。本実施形態の拡散反射部２４は、図２（ａ）に示すように、入射端面部２３に近い部位の導光パターン２４１は密度が小さくなると共に、入射端面部２３から離れるに従って徐々に密度が大きくなっており、入射端面部２３に近い側で疎、入射端面部２３から離れるに従って疎から密へと次第に変化するように構成されている。これにより、パネル装置の導光板２における面発光が前面部２１において均一なものとなる。   The diffuse reflection portion 24 is configured by providing light guide patterns 241 partially provided on the back surface portion 22 of the light guide plate 2 at a plurality of locations. The light guide pattern 241 is formed by dot printing of diffusible white ink or the like. As shown in FIG. 2A, the diffuse reflection portion 24 of the present embodiment has a light guide pattern 241 near the incident end surface portion 23 that has a smaller density, and the density gradually decreases as the distance from the incident end surface portion 23 increases. It is large and is configured to be sparse on the side close to the incident end face part 23 and gradually change from sparse to dense as the distance from the incident end face part 23 increases. Thereby, the surface light emission in the light-guide plate 2 of a panel apparatus becomes uniform in the front part 21. FIG.

なお、導光パターン２４１として図２（ｂ）に示すように、導光パターン２４１のドットの密度を一定のものにしたまま、入射端面部２３に近い部位の面積を小さくすると共に、入射端面部２３から離れるに従って徐々に面積を大きくするといったような面積比率にして、導光板２の前面部２１から一様な光を出射させるようにしてもよい。また、面積比率や密度を上記のように入射端面部２３からの距離によって変化させず、導光板２上の部分によって光量に変化を与えるように構成してももちろんよい。   As shown in FIG. 2B as the light guide pattern 241, the area of the portion close to the incident end face portion 23 is reduced while the dot density of the light guide pattern 241 is kept constant, and the incident end face portion. It is also possible to emit uniform light from the front surface portion 21 of the light guide plate 2 with an area ratio such that the area gradually increases as the distance from the light source 23 increases. Of course, the light quantity may be changed by the portion on the light guide plate 2 without changing the area ratio and density according to the distance from the incident end face portion 23 as described above.

なお、図２（ａ）及び図２（ｂ）における実施例では、図中符合Ｋ１及びＫ２で示す部位に加振器３が設けられている。   In addition, in the Example in Fig.2 (a) and FIG.2 (b), the vibrator 3 is provided in the site | part shown with the numerals K1 and K2 in a figure.

このような導光板２の裏面における導光パターン２４１が形成された部位には、加振器３が接着層７を介して固着されている。この加振器３は導光板２を振動板として用いることにより、音を発音するようになっている。つまり、加振器３により導光板２を励振させて撓み振動をさせることにより音を発生させることができる。本実施形態の加振器３は導光板２の略中央部に一つだけ設けられている。   The vibrator 3 is fixed to the portion where the light guide pattern 241 is formed on the back surface of the light guide plate 2 through the adhesive layer 7. The vibrator 3 generates a sound by using the light guide plate 2 as a diaphragm. That is, sound can be generated by exciting the light guide plate 2 with the vibrator 3 to cause flexural vibration. Only one vibrator 3 of the present embodiment is provided at the substantially central portion of the light guide plate 2.

このような発音機能付き面発光パネル１は、パネル装置のベース部５に装着されており、ベース部５に固定された光源４が、導光板２の入射端面部２３に臨むようにして設置されている。本実施形態の光源４は、ベース部５に固定された基板ベース４１と、基板ベース４１に設けられた基板４２と、基板４２に設けられたＬＥＤ４３（Light Emitting Diode：発光ダイオード）とを備えており、これら基板ベース４１と基板４２とＬＥＤ４３とでひとつのユニットを構成している。本実施形態における光源４は、正面視において導光板２の上縁部に設けられている。なお特に図示しないが、基板４２に接続されたＯＮ／ＯＦＦスイッチにより基板４２上のＬＥＤ４３の点灯／消灯ができるように構成されている。   The surface emitting panel 1 with such a sound generation function is mounted on the base portion 5 of the panel device, and the light source 4 fixed to the base portion 5 is installed so as to face the incident end surface portion 23 of the light guide plate 2. . The light source 4 of this embodiment includes a substrate base 41 fixed to the base portion 5, a substrate 42 provided on the substrate base 41, and an LED 43 (Light Emitting Diode) provided on the substrate 42. The substrate base 41, the substrate 42, and the LED 43 constitute one unit. The light source 4 in the present embodiment is provided at the upper edge of the light guide plate 2 in a front view. Although not particularly illustrated, the LED 43 on the substrate 42 can be turned on / off by an ON / OFF switch connected to the substrate 42.

さらに、ベース部５に光源４と導光板２を備える発音機能付き面発光パネル１とを装着した上で、導光板２の上下両縁部を覆う枠部６が着脱自在に設置されている。この上下縁部を覆う枠部６内に光源４が収容されており、この枠部６により光源４が保護されるように構成されている。   Further, a frame 6 that covers both upper and lower edges of the light guide plate 2 is detachably installed after the light source 4 and the surface emitting panel 1 with a sound generation function including the light guide plate 2 are mounted on the base portion 5. The light source 4 is accommodated in a frame portion 6 that covers the upper and lower edges, and the light source 4 is protected by the frame portion 6.

このようなパネル装置の光源４を点灯させると、光源４からの光が導光板２の入射端面部２３から入射する。そして、この光は導光板２内において反射を繰り返しながら反対側の端部に向けて伝播していくが、反射を繰り返す光の一部が導光板２の裏面部２２に設けられた導光パターン２４１により乱反射されて、導光板２の前面部２１から出射するようになる。この時、加振器３は導光パターン２４１の裏面に設けられているため、導光板２から発せられる光によって前方から加振器３は見えないものとなる。   When the light source 4 of such a panel device is turned on, the light from the light source 4 enters from the incident end face portion 23 of the light guide plate 2. The light propagates toward the opposite end while repeating reflection in the light guide plate 2, but a part of the light that repeats reflection is provided on the back surface portion 22 of the light guide plate 2. The light is diffusely reflected by the light 241 and is emitted from the front surface portion 21 of the light guide plate 2. At this time, since the vibrator 3 is provided on the back surface of the light guide pattern 241, the vibrator 3 cannot be seen from the front by the light emitted from the light guide plate 2.

このような発音機能付き面発光パネル１を用いれば、音響のみのための振動板を新たに設ける必要がなくなり、コンパクト化やコストの削減を図ることができる。しかも、加振器３を導光パターン２４１の裏面に接着層７を介して設けるだけでよいので、構造を簡略なものとしたまま、導光板２に発音機能を付与することができる。   If such a surface emitting panel 1 with a sound generation function is used, it is not necessary to newly provide a diaphragm for only sound, and it is possible to achieve compactness and cost reduction. In addition, since it is only necessary to provide the vibrator 3 on the back surface of the light guide pattern 241 via the adhesive layer 7, it is possible to provide a sound generation function to the light guide plate 2 while keeping the structure simple.

本実施形態では、光の出射面となる導光板２の前面部２１を露出させて構成しているが、この導光板２の前面部２１を、複数の孔部を穿設して音響性能の低下を防いだ透過性を有する化粧パネルで覆うようにすれば、より見栄えが向上すると共に、導光板２の前面部２１を外力から保護することができる。なお、この化粧パネルは、透明板によって構成されてもよいし木目柄などの柄模様を施して構成されていてもよい。   In the present embodiment, the front surface portion 21 of the light guide plate 2 serving as the light exit surface is exposed. However, the front surface portion 21 of the light guide plate 2 is formed with a plurality of holes so that the acoustic performance is improved. If it covers with the decorative panel which has the permeability | transmittance which prevented the fall, while improving appearance, the front-surface part 21 of the light-guide plate 2 can be protected from external force. In addition, this decorative panel may be configured by a transparent plate or may be configured by applying a pattern such as a wood grain pattern.

なお、上記実施形態においては、導光板２をアクリル樹脂により形成しているが、例えばガラスなどであってもよく、光透過材料であればよいものである。また、本実施形態において、入射端面部２３は導光板２の上端面に設けられているが、上端面に限らず、いずれかの端面を入射端面部２３としていればよいものである。さらに言えば、上下両端面を入射端面部２３とするようにしてもよい。   In the above embodiment, the light guide plate 2 is made of acrylic resin. However, for example, glass may be used as long as it is a light transmitting material. In the present embodiment, the incident end face portion 23 is provided on the upper end face of the light guide plate 2, but not limited to the upper end face, any end face may be used as the incident end face portion 23. Furthermore, the upper and lower end faces may be the incident end face portion 23.

さらに、本実施形態では導光パターン２４１を白色インクを塗布することにより形成しているが、例えば、プリズム状凹凸をレーザ加工したり、反射フィルムを貼着したりなどといったような従来周知のいずれの方法によっても形成可能なものである。   Further, in the present embodiment, the light guide pattern 241 is formed by applying white ink. However, for example, any conventionally known one such as laser processing of prism-shaped unevenness or pasting of a reflective film may be used. This method can also be formed.

また、上記実施形態における加振器３は、導光板２の略中央部に一つだけ設けるように構成されているが、導光板２の裏面部２２に形成された複数の導光パターン２４１に対して、複数の加振器３を設けるように構成しても、複数の加振器３がすべて前面から見えないようにできて見栄えを損なわないようにすることができるのはもちろんである。   Moreover, although the vibrator 3 in the said embodiment is comprised so that only one may be provided in the approximate center part of the light-guide plate 2, it is to the some light guide pattern 241 formed in the back surface part 22 of the light-guide plate 2. As shown in FIG. On the other hand, even if it comprises so that several exciter 3 may be provided, it cannot be overlooked that it can prevent all the several exciters 3 from being visible from the front, and it may impair appearance.

１ 発音機能付き面発光パネル
２ 導光板
２１ 前面部
２２ 裏面部
２３ 入射端面部
２４ 拡散反射部
２４１ 導光パターン
３ 加振器
４ 光源
４１ 基板ベース
４２ 基板
４３ ＬＥＤ
５ ベース部
６ 枠部
７ 接着層
８ 振動板 DESCRIPTION OF SYMBOLS 1 Surface emitting panel with sound generation function 2 Light guide plate 21 Front surface part 22 Back surface part 23 Incident end surface part 24 Diffuse reflection part 241 Light guide pattern 3 Exciter 4 Light source 41 Substrate base 42 Substrate 43 LED
5 Base part 6 Frame part 7 Adhesive layer 8 Diaphragm

Claims (2)

外周端面の一部から光源による光を入射させ該入射した光を裏面部に設けた拡散反射部に乱反射させて前面部から出射させる導光板と、導光板を励振させる加振器と、を備えた発音機能付き面発光パネルであって、前記導光板裏面における拡散反射部が形成されている部位に加振器を設けて成ることを特徴とする発音機能付き面発光パネル。   A light guide plate that causes light from a light source to enter from a part of the outer peripheral end surface, diffusely reflects the incident light to a diffuse reflection portion provided on the back surface, and emits the light from the front surface; and a vibrator that excites the light guide plate A surface emitting panel with a sound generation function, wherein a vibration exciter is provided at a portion where a diffuse reflection portion is formed on the back surface of the light guide plate. 前記拡散反射部は、導光板の裏面部に部分的に設けられた導光パターンを複数箇所に設けることで構成して成る請求項１記載の発音機能付き面発光パネル。   The surface light emitting panel with a sound generation function according to claim 1, wherein the diffuse reflection portion is configured by providing a plurality of light guide patterns partially provided on a back surface portion of the light guide plate.
JP2009077669A 2009-03-26 2009-03-26 Surface emitting panel with pronunciation function Expired - Fee Related JP5144574B2 (en)

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CN111336447A (en) * 2018-12-19 2020-06-26 东莞市铭皓照明有限公司 Panel light with sound function

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CN111336447A (en) * 2018-12-19 2020-06-26 东莞市铭皓照明有限公司 Panel light with sound function

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