JP3032899B2 - Lighting equipment - Google Patents

Lighting equipment

Info

Publication number
JP3032899B2
JP3032899B2 JP2269481A JP26948190A JP3032899B2 JP 3032899 B2 JP3032899 B2 JP 3032899B2 JP 2269481 A JP2269481 A JP 2269481A JP 26948190 A JP26948190 A JP 26948190A JP 3032899 B2 JP3032899 B2 JP 3032899B2
Authority
JP
Japan
Prior art keywords
light
plate
diffusing
plane
light source
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
JP2269481A
Other languages
Japanese (ja)
Other versions
JPH04146401A (en
Inventor
和明 横山
集 蝦名
勇 金子
敦之 野口
秀明 加藤
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Enplas Corp
Original Assignee
Enplas Corp
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Filing date
Publication date
Application filed by Enplas Corp filed Critical Enplas Corp
Priority to JP2269481A priority Critical patent/JP3032899B2/en
Publication of JPH04146401A publication Critical patent/JPH04146401A/en
Application granted granted Critical
Publication of JP3032899B2 publication Critical patent/JP3032899B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133615—Edge-illuminating devices, i.e. illuminating from the side

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  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Liquid Crystal (AREA)
  • Optical Elements Other Than Lenses (AREA)

Description

【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、照明装置で例えば液晶を用いた表示装置に
おけるバックライトとして使用するのに適した照明装置
に関するものである。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lighting device suitable for use as a backlight in a display device using, for example, a liquid crystal in a lighting device.

〔従来の技術〕[Conventional technology]

液晶を用いた表示装置は、一定面積の表示面を均一な
輝度にて照明する必要がある。そのために薄型であって
一定面内において均一に照明が可能な照明装置が要求さ
れる。このような要求を満足する照明装置として、従来
第６図に示すような照明装置が知られている。即ち、反
射板１の反射面1a側に蛍光管等の直線状の光源２を配置
し、更に拡散板３を配置したもので、光源２より直接又
は反射板１にて反射された後拡散板３に達した光を、こ
の拡散板３にて拡散光として照明光として用いるもので
ある。又第７図に示すような、光源21と、入射端面を光
源に近接させ配置した導光体22と、導光体22の表面に設
けた拡散面23と、導光体22の裏面に設けた反射面24とよ
り構成されている照明装置も知られている。そして光源
21よりの光が入射端面より導光体22に入射しその内部を
表面、裏面で反射しながら入射端面と反対側へ伝えられ
て行く間にその一部が拡散面23を通り拡散光として出て
行くことによって拡散面から均一な拡散光を発する面光
源となる。A display device using a liquid crystal needs to illuminate a display surface having a constant area with uniform luminance. Therefore, an illumination device that is thin and capable of uniformly illuminating within a certain plane is required. As a lighting device that satisfies such a demand, a lighting device as shown in FIG. 6 is conventionally known. That is, a linear light source 2 such as a fluorescent tube is disposed on the reflection surface 1a side of the reflection plate 1 and a diffusion plate 3 is further disposed. The diffusion plate is directly reflected from the light source 2 or reflected by the reflection plate 1. The light that has reached 3 is used as illumination light by the diffusion plate 3 as diffused light. Also, as shown in FIG. 7, a light source 21, a light guide 22 having an incident end face arranged close to the light source, a diffusion surface 23 provided on the surface of the light guide 22, and a back surface of the light guide 22 There is also known an illuminating device including a reflecting surface 24. And the light source
While the light from 21 is incident on the light guide 22 from the incident end face, the inside is reflected by the front and back surfaces and transmitted to the opposite side from the incident end face, and a part of it passes through the diffusing surface 23 and exits as diffused light. As a result, the surface light source emits uniform diffused light from the diffusion surface.

このような照明装置は、薄型で均一な輝度の拡散光を
得るために前者の場合には反射板２の曲面形状等に改良
を加えたものが知られている。そしていずれの場合にも
上記の要求を可成り満足したものが得られている。Such an illuminating device has been known in which in the former case, the shape of the curved surface of the reflector 2 is improved in order to obtain a thin and uniform diffused light. In each case, those satisfying the above requirements are obtained.

〔発明が解決しようとする課題〕[Problems to be solved by the invention]

しかるに、このような照明装置は、薄型で均一な輝度
分布を有することのほか、出来る限り高い輝度の明るい
照明が可能であることも要求される。この要求は、前記
後者（導光式）の場合には、主出射方向が斜めとなるた
め、輝度面に垂直の方向での高輝度化ということが特に
望まれている。However, such an illuminating device is required to be thin and have a uniform luminance distribution, and to be capable of bright illumination with as high a luminance as possible. In the case of the latter (light guide type), since the main emission direction is oblique, it is particularly desired to increase the luminance in a direction perpendicular to the luminance surface.

したがって本発明は、薄型で均一な輝度分布が得られ
る上に、一層明るい高輝度面の照明装置を提供すること
を目的とするものである。Accordingly, it is an object of the present invention to provide a lighting device having a thin and uniform brightness distribution and a brighter and brighter surface.

〔課題を解決するための手段〕[Means for solving the problem]

本発明の照明装置は、前記の目的を達成するために、
前述の従来の照明装置の拡散板の前面に拡散板上の各点
より拡散する光を拡散板に垂直な方向を中心として一定
の角度範囲内に向かうようにその拡がりを規制するため
の規制板を配置したものである。The lighting device of the present invention, in order to achieve the above object,
A regulating plate for regulating the spread of light diffused from each point on the diffuser to the front of the diffuser of the above-described conventional lighting device so as to be directed within a certain angle range centered on a direction perpendicular to the diffuser. Is arranged.

例えば液晶を用いた表示装置においては、表示板上の
画像その他を観察する場合にそのほとんどが表示板に垂
直な方向より画像等をみている。For example, in a display device using a liquid crystal, when observing an image or the like on a display panel, most of the image is viewed from a direction perpendicular to the display panel.

本発明は、拡散板よりその垂直線に対し大きな角度に
て拡散する光は、表示板の観察には全くか殆んど寄与し
ていないことに着目してなされたものである。つまり拡
散板上の各点より拡散する光を夫々全体として拡散板に
垂直な方向に導くようにして、その広がりを規制するた
めの規制板を拡散板の前面に並設するものである。そし
てこれらによって、従来利用されない大きな角度で拡散
する光をも利用するようにして、表示板の観察に寄与す
る光の輝度を大にしたものである。しかも拡散板上より
拡散する光のすべてがその垂直方向に対する角度が小さ
くなるようにその広がりを規制板により導かれるために
輝度分布の均一性は保ったまま全体として輝度を高める
ことが出来る。The present invention has been made by focusing on the fact that light diffused at a larger angle with respect to the vertical line than the diffuser plate does not contribute at all to the observation of the display plate. That is, the light diffused from each point on the diffuser plate is guided as a whole in a direction perpendicular to the diffuser plate, and a regulating plate for regulating the spread is arranged in front of the diffuser plate. By using these, light that diffuses at a large angle, which is not conventionally used, is also used, thereby increasing the brightness of light contributing to observation of the display panel. Moreover, since all the light diffused from the diffusion plate is guided by the regulating plate so that the angle with respect to the vertical direction is reduced, the overall luminance can be increased while maintaining the uniformity of the luminance distribution.

本発明で用いられる規制板としては、後に実施例にお
いて具体的に説明するような拡散板側が直線で他の側が
鋸歯状の断面形状をした透明板で、その鋸歯状部の長さ
方向を直線状の光源の長さ方向に向けた配置としたもの
等が考えられる。この場合には、鋸歯形状を規則正しい
形状としておくことにより所定の指向性をもたせること
ができ、効率よく輝度面に垂直方向の輝度を上げること
ができる。又、鋸歯状に代えて不連続、不定の凹凸形状
たとえばシボ形状或は微小な円錐状突起を不規則に多数
配した形状とすることもできる。これらの場合には、拡
散板に垂直な方向に向かって導かれる光の割合が減少す
るため、輝度アップ率は鋸歯状の場合よりやや落ちる
が、その分視野角が広くなる。The regulating plate used in the present invention is a transparent plate having a straight side on the diffusion plate side and a saw-toothed cross-section on the other side, which will be specifically described in Examples later, and a straight line extending in the length direction of the saw-toothed portion. A light source arranged in the longitudinal direction of the light source may be considered. In this case, by setting the saw-tooth shape to a regular shape, a predetermined directivity can be provided, and the luminance in the direction perpendicular to the luminance surface can be efficiently increased. Further, instead of the sawtooth shape, a discontinuous, irregular irregular shape, for example, a grain shape or a shape in which a large number of minute conical projections are irregularly arranged may be used. In these cases, since the ratio of light guided toward the direction perpendicular to the diffusion plate is reduced, the brightness increase rate is slightly lower than in the case of a sawtooth shape, but the viewing angle is correspondingly widened.

〔実施例〕〔Example〕

次に本発明の照明装置の一実施例を図面にもとづいて
説明する。第１図は本発明の一実施例の断面図で、１は
反射板、２は直線状の光線、３は拡散板であってこれら
は従来の照明装置と同じ構成である。又４は拡散板３上
に並設した規制板であって、第２図にその一部を拡大し
て示した断面形状のものが連続し、拡散板３の大きさと
同じ面積を有している透明板から成っている。Next, an embodiment of the lighting device of the present invention will be described with reference to the drawings. FIG. 1 is a cross-sectional view of one embodiment of the present invention, wherein 1 is a reflector, 2 is a linear light beam, and 3 is a diffuser, which have the same configuration as a conventional lighting device. Reference numeral 4 denotes a regulating plate provided side by side on the diffusion plate 3, which has a continuous cross-sectional shape, a part of which is shown in FIG. 2 in an enlarged manner, having the same area as the size of the diffusion plate 3. Made of transparent plate.

第２図に示すような、拡散板３の側の面4aが平面（断
面が直線）であって、反対側の面4bが断面鋸歯状である
透明板の規制板４を拡散板上に配置すると、拡散板より
の光l1は、この規制板４にて屈折してから上方へ向か
う。この時、面4aに入射した時の角θ１つまり拡散板３
より発する光の面θ１は、面4bを出た後は拡散板３に垂
直な線に対して角θ２の方向へ向かう。ここで図面より
明らかなようにθ２＜θ１となる。したがって、第６図
に示す従来の照明装置において拡散板３上の点A,B,Cよ
り出来る拡散光は、本発明装置の面4bを出た後は図示す
るようになる。As shown in FIG. 2, a transparent regulating plate 4 having a surface 4a on the side of the diffusion plate 3 which is a plane (cross section is straight) and a surface 4b on the opposite side having a sawtooth cross section is arranged on the diffusion plate. Thus, light l 1 than the diffusion plate is directed from the refracted by the regulation plate 4 upwards. At this time, the angle θ 1 when entering the surface 4 a, that is, the diffusion plate 3
Surface theta 1 of light emitted more, after leaving the plane 4b is directed toward the angular theta 2 direction relative to a line perpendicular to the diffusion plate 3. Here, as is clear from the drawing, θ 2 <θ 1 holds. Accordingly, in the conventional lighting device shown in FIG. 6, the diffused light generated from points A, B, and C on the diffuser plate 3 becomes as shown after exiting the surface 4b of the device of the present invention.

この実施例において、規制板４の角θが大になると、
第３図のように特に面4aに垂直に入射する光l0は面4bに
て全反射する。そのため角θがあまり大であると光量の
損失につながる。又斜めに向かう光が少なくなり、斜方
向からの観察がしにくくなる。しかし一般に光源２の直
上部は、拡散板３が光源２に最も近く、そのため他と比
べて輝度が高くなる。したがって多少の光量の損失を犠
牲にして、上記の全反射を逆に利用して光l0を除去する
ことにより、他の手段を用いることなく、又は他の手段
との共用によって拡散板３上での輝度の均一化に役立て
ることが可能である。一方θがあまり小であると規制板
４が平行平面板に近くなり本発明の効果がほとんど得ら
れなくなる。したがってθの値は、照明装置の大きさ
（面積）、材料（屈折率）等によって適切な範囲に選択
する必要がある。In this embodiment, when the angle θ of the regulating plate 4 becomes large,
In particular, as shown in FIG. 3, light 10 which is incident perpendicularly to the surface 4a is totally reflected at the surface 4b. Therefore, if the angle θ is too large, a loss of the light amount will be caused. Also, the amount of light traveling obliquely decreases, making it difficult to observe from an oblique direction. However, in general, the diffusion plate 3 is located immediately above the light source 2 closest to the light source 2, so that the brightness is higher than that of the others. Thus the expense of the loss of some quantity, by removing the light l 0 using reversed total reflection described above, without using other means, or the diffusion plate 3 on the sharing with other means It is possible to help uniform the brightness of the image. On the other hand, if θ is too small, the regulating plate 4 becomes close to a parallel plane plate, and the effect of the present invention can hardly be obtained. Therefore, the value of θ needs to be selected in an appropriate range depending on the size (area), material (refractive index), and the like of the lighting device.

例えば、材料としてPMMA（アクリル樹脂）を用いた22
0×140mmの大きさの照明装置の場合、θ＝45度にすると
比較的よい効果が得られ、視野角が35度程度で、表示面
上での輝度が同じ装置で規制板を用いない従来のものに
比べて30％上昇した。For example, using PMMA (acrylic resin) as a material 22
In the case of a lighting device with a size of 0 x 140 mm, a relatively good effect can be obtained by setting θ = 45 degrees, a viewing angle of about 35 degrees, and a device with the same luminance on the display surface without using a regulating plate Up 30% compared to

上記のように、この実施例の規制板４の面4bの角θの
値は、材料の屈折率や使用目的等により適切な値に選べ
ばよい。ここで使用し得るガラスやプラスチック材料の
屈折率は、1.4から1.7の範囲である。そのため、この点
を考慮すると前記の角θの範囲としては０゜＜θ＜60゜
が適当である。このθの値は、視野角及び輝度効率等の
条件設定により決められる。又、拡散板３と規制板４は
空気層を介して並設する必要がある。この並設によって
規制板４へ入射する光の角度は、拡散板３による拡散光
の角度に比べて約60％の角度で狹くなる。従って、この
現象により視野角はやや狹くなるものの、輝度効率は大
きくアップする。As described above, the value of the angle θ of the surface 4b of the regulating plate 4 in this embodiment may be selected to an appropriate value according to the refractive index of the material, the purpose of use, and the like. The refractive index of the glass and plastic materials that can be used here is in the range of 1.4 to 1.7. Therefore, considering this point, 0 ° <θ <60 ° is appropriate as the range of the angle θ. The value of θ is determined by setting conditions such as the viewing angle and the luminance efficiency. Further, the diffusion plate 3 and the restriction plate 4 need to be arranged side by side via an air layer. Due to this juxtaposition, the angle of the light incident on the regulating plate 4 is narrowed by about 60% of the angle of the diffused light by the diffuser 3. Accordingly, the viewing angle is slightly narrowed by this phenomenon, but the luminance efficiency is greatly increased.

更に、前述のように、輝度の高い拡散板３の中央の輝
度を落として全体として均一な輝度分布にするために、
中央部のみ、他の部分よりもθを大にするというよう
に、使用目的等を考慮して場所によりθの値を異なるよ
うにする。更に、上記実施例における拡散板、規制板
は、厚さに関わりなく板体シート状のものであってもか
まわない。Further, as described above, in order to reduce the luminance at the center of the diffuser plate 3 having a high luminance to obtain a uniform luminance distribution as a whole,
The value of θ is made different depending on the location in consideration of the purpose of use, for example, the value of θ is made larger than the other portions only in the central portion. Further, the diffusion plate and the regulating plate in the above embodiment may be in the form of a plate-like sheet regardless of the thickness.

又、図示する実施例では面4bの各部分が断面直線であ
るがわずかに凸面又は凹面になっていてもよい。又頂点
部分も尖った形状ではなく丸みを持たせてもよい。又、
これらの高さ、配列等が不規則になっていてもかまわな
い。即ち、シボ形状或は多数の円錐状突起を不規則に一
体に突出形成したもの等のほか、これらに類したもので
も勿論かまわない。これらの場合、拡散板に垂直な方向
に向かって導かれる光の割合が減少するので輝度アップ
率はやや落ちるが、その分、規則的な凹凸からなる鋸歯
状の断面形状としたものに比べて表示面に向かう光が広
がっているから、一定の視野角を維持しながら輝度アッ
プの目的を達することができる。Further, in the illustrated embodiment, each part of the surface 4b is straight in cross section, but may be slightly convex or concave. Also, the apex portion may have a rounded shape instead of a sharp shape. or,
These heights, arrangements and the like may be irregular. That is, it is possible to use a grain-shaped or a large number of conical protrusions formed irregularly and integrally, or the like, or the like. In these cases, the ratio of light guided toward the direction perpendicular to the diffusion plate is reduced, so that the brightness increase rate is slightly reduced.However, as compared to a sawtooth-shaped cross-sectional shape having regular irregularities. Since the light traveling toward the display surface is spread, the object of increasing the brightness can be achieved while maintaining a constant viewing angle.

たとえば、このような規制板として透明板の表面にし
ぼを形成したものは、第４図に拡大して示すようにその
表面は不規則な凹凸形状をなしてる。しかしこれを大ま
かに見ると、大小の鋸歯状部分（プリズム状部分）が組
合わさった形状をなしている。したがって第４図のよう
なしぼを有する透明板を、本発明の規制板として使用し
た場合、光の拡散作用に加えて、第２図，第３図に示す
規制板と同様の作用を有している。即ち本発明の規制板
としての作用を有するものである。その上鋸歯形状およ
びその大きさの異なるものが組合わされていることによ
り、鋸歯状透明板にて発生しがちな死角部分が生ずるこ
とがないので好ましい。For example, such a regulating plate having a transparent plate with a grain formed on the surface has an irregular uneven shape as shown in an enlarged view in FIG. However, when this is roughly viewed, it has a shape in which large and small sawtooth-shaped portions (prism-shaped portions) are combined. Therefore, when a transparent plate having a grain as shown in FIG. 4 is used as the regulating plate of the present invention, it has an effect similar to that of the regulating plate shown in FIGS. ing. That is, it has the function as the regulating plate of the present invention. In addition, the combination of the sawtooth shape and the size different from each other is preferable because blind spots, which tend to occur in the sawtooth transparent plate, do not occur.

第５図は、本発明の他の実施例で、導光体を用いた照
明装置に用いた光拡散装置を示す断面図で、11は光源、
12は導光体、13は拡散板、14は反射面である。15は規制
部材で、第２図と類似の形状である。FIG. 5 is a cross-sectional view showing a light diffusing device used in a lighting device using a light guide according to another embodiment of the present invention.
12 is a light guide, 13 is a diffusion plate, and 14 is a reflection surface. Reference numeral 15 denotes a regulating member having a shape similar to that of FIG.

この実施例においては、規制板が第１図乃至第３図に
示す実施例の規制板と同様の形状であるので、導光体12
より外部へ出る光は、まず拡散板13で拡散光となり次い
で規制板15の鋸歯状部分15aでその多くが上方へ向けら
れ、拡散面に対し垂直方向の明るさが増大する。In this embodiment, the regulating plate has the same shape as the regulating plate of the embodiment shown in FIGS.
Most of the light that goes to the outside is diffused by the diffusion plate 13 and then is largely directed upward by the saw-toothed portion 15a of the regulating plate 15, whereby the brightness in the direction perpendicular to the diffusion surface increases.

この実施例の装置を用いて実験した結果、拡散面に垂
直な方向で30％の明るさの増加がみられた。As a result of an experiment using the apparatus of this example, a 30% increase in brightness in a direction perpendicular to the diffusion surface was observed.

この第５図の導光体を用いた実施例の場合も、規制板
として第４図のものを用いてもよい。In the case of the embodiment using the light guide shown in FIG. 5, the regulating plate shown in FIG. 4 may be used.

〔発明の効果〕〔The invention's effect〕

本発明の照明装置は、従来のものでは使用目的によっ
ては無駄になっていた大きい角度で拡散する光を利用し
得るようにしたもので、しかも全体として拡散方向が小
さくなるようにしたため、均一な輝度分布を保ったまま
輝度のみを大にすることが出来、明るく均一な輝度分布
のものを得ることが出来る。The illuminating device of the present invention can utilize light that diffuses at a large angle, which was wasted depending on the purpose of use in the related art. Only the luminance can be increased while maintaining the luminance distribution, and a bright and uniform luminance distribution can be obtained.

【図面の簡単な説明】[Brief description of the drawings]

第１図は本発明の一実施例の断面図、第２図，第３図は
夫々上記実施例で用いる規制板の一部を拡大して示した
断面図、第４図は他の規制板の断面図、第５図は他の実
施例の断面図、第６図、第７図は従来の照明装置の断面
図である。 １……反射板、２……光源、３……拡散板、４……規制
板FIG. 1 is a cross-sectional view of one embodiment of the present invention, FIGS. 2 and 3 are cross-sectional views each showing an enlarged part of a restricting plate used in the above embodiment, and FIG. 4 is another restricting plate. 5 is a cross-sectional view of another embodiment, and FIGS. 6 and 7 are cross-sectional views of a conventional lighting device. 1 ... reflection plate, 2 ... light source, 3 ... diffusion plate, 4 ... regulation plate

───────────────────────────────────────────────────── フロントページの続き (72)発明者 野口 敦之 埼玉県川口市並木２丁目30番１号 株式 会社エンプラス内 (72)発明者 加藤 秀明 埼玉県川口市並木２丁目30番１号 株式 会社エンプラス内 (56)参考文献 特開 昭63−68814（ＪＰ，Ａ) 特開 平４−67016（ＪＰ，Ａ) 特開 平４−32888（ＪＰ，Ａ) 特開 平３−85586（ＪＰ，Ａ) 特開 平２−257188（ＪＰ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) G02F 1/13357 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Atsuyuki Noguchi 2-30-1, Namiki, Kawaguchi City, Saitama Prefecture Within Enplas Co., Ltd. (72) Inventor Hideaki Kato 2-30-1, Namiki, Kawaguchi City, Saitama Prefecture Enplas Co., Ltd. (56) References JP-A-63-68814 (JP, A) JP-A-4-67016 (JP, A) JP-A-4-32888 (JP, A) JP-A-3-85586 (JP, A) JP-A-2-257188 (JP, A) (58) Fields investigated (Int. Cl. 7 , DB name) G02F 1/13357

Claims (3)

(57)【特許請求の範囲】(57) [Claims] 【請求項１】直線状の光源からの光を方向制御して一定
の面内に導き、該面部が略均一の輝度になるようにした
照明装置であって、光を透過拡散せしめる拡散部材を上
記面部に重ねて配設するとともに、更に上記拡散部材に
重ねて上記拡散部材の各点より発する拡散光の拡がりを
規制するように各拡散光を導く規制部材を配設してな
り、上記規制部材は上記拡散部材側が平面状で、他の側
が断面鋸歯状であり、その鋸歯状部の長さ方向が光源の
長さ方向に向けて配置された凹凸面であるとともに、鋸
歯状の断面形状をなす斜面の傾きが場所によって異なる
ことを特徴とする照明装置。1. A lighting device in which light from a linear light source is directionally controlled and guided into a predetermined plane so that the plane has substantially uniform brightness, and a diffusing member for transmitting and diffusing the light is provided. A restricting member for guiding each diffused light is provided so as to regulate the spread of diffused light emitted from each point of the diffusing member, which is further disposed on the surface portion and disposed on the diffusing member. The member has a planar shape on the diffusion member side and a sawtooth cross section on the other side, and the length direction of the sawtooth portion is an uneven surface arranged toward the length direction of the light source, and the sawtooth cross section shape An illumination device, characterized in that the slope of the slope that forms is different depending on the place. 【請求項２】光源からの光を方向制御して一定の面内に
導き、該面部が略均一の輝度になるようにした照明装置
であって、光を透過拡散せしめる拡散部材を上記面部に
重ねて配設するとともに、更に上記拡散部材に重ねて上
記拡散部材の各点より発する拡散光の拡がりを規制する
ように各拡散光を導く規制部材を配設してなり、上記規
制部材は不連続、不定の凹凸形状からなる面を有するこ
とを特徴とする照明装置。2. An illuminating device in which light from a light source is directionally controlled and guided into a predetermined plane so that the plane has a substantially uniform brightness, and a diffusing member for transmitting and diffusing light is provided on the plane. In addition to being arranged so as to be superimposed, a regulating member for guiding each diffused light so as to regulate the spread of diffused light emitted from each point of the diffuser is further arranged so as to be superimposed on the diffuser. An illuminating device having a surface having a continuous, irregular irregular shape. 【請求項３】前記規制部材は透過率が70％以上である透
光部材である請求項（１）又は（２）の照明装置。3. The lighting device according to claim 1, wherein the regulating member is a light transmitting member having a transmittance of 70% or more.
JP2269481A 1990-10-09 1990-10-09 Lighting equipment Expired - Fee Related JP3032899B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2269481A JP3032899B2 (en) 1990-10-09 1990-10-09 Lighting equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2269481A JP3032899B2 (en) 1990-10-09 1990-10-09 Lighting equipment

Related Child Applications (1)

Application Number Title Priority Date Filing Date
JP11211274A Division JP2000048620A (en) 1999-07-26 1999-07-26 Lighting system

Publications (2)

Publication Number Publication Date
JPH04146401A JPH04146401A (en) 1992-05-20
JP3032899B2 true JP3032899B2 (en) 2000-04-17

Family

ID=17473044

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2269481A Expired - Fee Related JP3032899B2 (en) 1990-10-09 1990-10-09 Lighting equipment

Country Status (1)

Country Link
JP (1) JP3032899B2 (en)

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JPH07122140B2 (en) * 1987-09-11 1995-12-25 日本合成ゴム株式会社 Membrane formation method
US5414599A (en) * 1991-09-09 1995-05-09 Enplas Corporation Surface light source device
US5769522A (en) * 1991-09-09 1998-06-23 Enplas Corporation Surface light source device
MY124455A (en) * 1992-06-01 2006-06-30 Sharp Kk Liquid crystal display
CA2097109C (en) * 1992-06-01 2000-01-11 Shozo Kokawa Liquid crystal display
JP2931480B2 (en) * 1992-06-01 1999-08-09 シャープ株式会社 Light collecting device used for light source device
JPH0667004A (en) * 1992-08-25 1994-03-11 Mitsubishi Rayon Co Ltd Triangular prism sheet for liquid crystal display device and its manufacture
US5633623A (en) * 1995-02-21 1997-05-27 Campman; James P. Personal indicator with light emission multiplying microprism array
US7320535B2 (en) 2002-08-30 2008-01-22 Kimoto Co., Ltd. Light control film
JP4135092B2 (en) * 2003-09-29 2008-08-20 ソニー株式会社 Backlight and diffusion plate manufacturing method, and liquid crystal display device
JP4505755B2 (en) * 2007-03-30 2010-07-21 オムロン株式会社 Diffuser and surface light source device
WO2013061875A1 (en) * 2011-10-28 2013-05-02 シャープ株式会社 Liquid crystal display device
JP6395372B2 (en) * 2013-11-27 2018-09-26 三菱電機株式会社 Multi-screen display device

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Publication number Priority date Publication date Assignee Title
KR102488830B1 (en) 2015-12-14 2023-01-13 에이.케이 스탬핑 컴퍼니, 인크. multi piece shield

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