JPH0627327A - Lighting equipment - Google Patents
Lighting equipmentInfo
- Publication number
- JPH0627327A JPH0627327A JP4184975A JP18497592A JPH0627327A JP H0627327 A JPH0627327 A JP H0627327A JP 4184975 A JP4184975 A JP 4184975A JP 18497592 A JP18497592 A JP 18497592A JP H0627327 A JPH0627327 A JP H0627327A
- Authority
- JP
- Japan
- Prior art keywords
- light
- prism
- sheet
- transparent plate
- light emitting
- 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.)
- Pending
Links
- 238000009792 diffusion process Methods 0.000 claims description 7
- 238000009751 slip forming Methods 0.000 claims description 4
- 238000005286 illumination Methods 0.000 claims 1
- 229920000178 Acrylic resin Polymers 0.000 description 4
- 239000004925 Acrylic resin Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 229920005668 polycarbonate resin Polymers 0.000 description 4
- 239000004431 polycarbonate resin Substances 0.000 description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 239000004973 liquid crystal related substance Substances 0.000 description 2
- 239000002985 plastic film Substances 0.000 description 2
- 229910052709 silver Inorganic materials 0.000 description 2
- 239000004332 silver Substances 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000013307 optical fiber Substances 0.000 description 1
- -1 polyethylene terephthalate Polymers 0.000 description 1
- 229920000139 polyethylene terephthalate Polymers 0.000 description 1
- 239000005020 polyethylene terephthalate Substances 0.000 description 1
- 229920005672 polyolefin resin Polymers 0.000 description 1
- 229920005990 polystyrene resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000012780 transparent material Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Landscapes
- Liquid Crystal (AREA)
- Planar Illumination Modules (AREA)
- Light Guides In General And Applications Therefor (AREA)
- Optical Elements Other Than Lenses (AREA)
Abstract
(57)【要約】
【目的】 プリズムシートを利用した導光を目的とする
透明板を用いた照明装置において、プリズムによる反射
光線を有効に出光させ、全効率を向上する。
【構成】 透明板の出光面側にプリズムシート、反出光
面側にプリズム構造を形成した光反射シートを配置し、
プリズムシートのプリズム面において反射した光線を光
反射シートのプリズム面にてより出光面に対して低い角
度に反射して、ついでプリズムシートにおいて出光させ
ることができる。
(57) [Abstract] [Purpose] In a lighting device using a transparent plate for the purpose of guiding light using a prism sheet, the reflected light from the prism is effectively emitted to improve the total efficiency. [Structure] A prism sheet is arranged on the light emitting surface side of the transparent plate, and a light reflecting sheet having a prism structure is arranged on the opposite light emitting surface side,
The light rays reflected by the prism surface of the prism sheet can be reflected by the prism surface of the light reflecting sheet at a lower angle with respect to the light emitting surface, and then emitted by the prism sheet.
Description
【０００１】[0001]
【産業上の利用分野】本発明は、薄型の照明装置に関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a thin lighting device.
【０００２】さらに詳しくは、棒状光源と導光系よりな
り、液晶表示体等のバックライトとして用いられる照明
装置に関する。More specifically, the present invention relates to an illuminating device comprising a rod-shaped light source and a light guide system and used as a backlight for a liquid crystal display or the like.
【０００３】[0003]
【従来の技術】従来、導光のための透明板と表面にプリ
ズム構造を形成したシート（以下プリズムシート）を有
する照明装置は、特開昭６３−３１８００３および特開
平３−６９１８４に示されるような構成であった。2. Description of the Related Art Conventionally, an illuminating device having a transparent plate for guiding light and a sheet having a prism structure formed on the surface (hereinafter referred to as a prism sheet) is disclosed in JP-A-63-318003 and JP-A-3-69184. It was a composition.
【０００４】[0004]
【発明が解決しようとする課題】しかし、かかる従来の
照明装置は、プリズムシートの光学作用により、出光面
の法線方向から角度の大きい光束を概ね法線方向に変換
するため、見かけの輝度を高めることができるが、法線
方向の光束はプリズム面で反射され透明板に戻されるた
め、結果として効率を下げているという問題点を有して
いた。However, such a conventional illuminating device converts the luminous flux having a large angle from the normal direction of the light exit surface to the normal direction by the optical action of the prism sheet, so that the apparent brightness is reduced. Although it can be increased, the light flux in the normal direction is reflected by the prism surface and returned to the transparent plate, resulting in a problem of reduced efficiency.
【０００５】そこで、本発明は従来のこのような問題点
を解決するため、簡単な構造にて従来より高輝度な照明
装置を提供することを目的とする。Therefore, an object of the present invention is to provide an illuminating device having a simple structure and higher brightness than conventional ones in order to solve the above-mentioned conventional problems.
【０００６】[0006]
【課題を解決するための手段】前記課題を解決するため
に、本発明の照明装置は、乳白色系の拡散層が設けられ
た透明板と、該透明板の端面に隣接配置した光源と、表
面に細かいプリズム構造を連続的に形成した透明シート
を該透明板の出光面に重ねて配置した照明装置におい
て、前記透明板の出光面に対向する面に、表面に細かい
プリズム構造を連続的に形成した白色または鏡面を持っ
た反射シートを重ねて配置したことを特徴とする。In order to solve the above-mentioned problems, an illuminating device of the present invention comprises a transparent plate provided with a milky white diffusion layer, a light source arranged adjacent to an end face of the transparent plate, and a surface. In a lighting device in which a transparent sheet having a fine prism structure continuously formed is placed on the light emitting surface of the transparent plate, a fine prism structure is continuously formed on the surface facing the light emitting surface of the transparent plate. It is characterized in that the reflecting sheets having a white or mirror surface are stacked and arranged.
【０００７】また、前記反射シートに形成したプリズム
構造の頂角が１２０度から１６０度であることを特徴と
する。The prism structure formed on the reflection sheet has an apex angle of 120 to 160 degrees.
【０００８】[0008]
【実施例】以下に本考案の実施例を図面に基いて説明す
る。図１および図２において、透明板１は概長方形で一
定の厚みを持つ透明な板であり、少なくとも出光面２と
反出光面３、望ましくは全ての面が鏡面（平滑面）によ
り構成される。透明板１の材質としては、光吸収が少な
く、屈折率が空気より大きい透明材料なら何でもよい
が、特に屈折率１．４１以上が望ましく、アクリル樹
脂、アモルファスポリオレフィン系樹脂、ポリカーボネ
ート樹脂、ポリスチレン樹脂、ガラス等が用いられる。
屈折率が１．４１以上の場合、臨界角が４５度以下とな
り透明板１に入射した全ての光線は端面４と概直角をな
す鏡面で全反射をすることができる。Embodiments of the present invention will be described below with reference to the drawings. 1 and 2, the transparent plate 1 is a transparent plate having a substantially rectangular shape and a certain thickness, and at least the light emitting surface 2 and the non-light emitting surface 3, preferably all surfaces are mirror surfaces (smooth surfaces). . The transparent plate 1 may be made of any transparent material that absorbs little light and has a refractive index higher than air, but a refractive index of 1.41 or more is particularly desirable, and acrylic resin, amorphous polyolefin resin, polycarbonate resin, polystyrene resin, Glass or the like is used.
When the refractive index is 1.41 or more, the critical angle becomes 45 degrees or less, and all the rays incident on the transparent plate 1 can be totally reflected by the mirror surface that is substantially perpendicular to the end surface 4.
【０００９】透明板１の反出光面３には印刷または形状
付加により拡散系５が設けられている。拡散系５は反出
光面３上に細線状または網点状に形成され鏡面部に対し
て一定の分布を持っている。これは、透明板１の端面４
より入射した光線が端面４と概直角をなす出光面２、反
出光面３の鏡面部により全反射し、透明板１中を端面４
からより遠くに進むのに対して、ある確率で拡散系５に
到達し一部が出光面２より出光するのに必要なためであ
る。A diffusing system 5 is provided on the reflection surface 3 of the transparent plate 1 by printing or adding a shape. The diffusing system 5 is formed in a thin line shape or a halftone dot shape on the reflection light emitting surface 3 and has a constant distribution with respect to the mirror surface portion. This is the end surface 4 of the transparent plate 1.
The incident light rays are totally reflected by the mirror surface portions of the light emitting surface 2 and the non-light emitting surface 3 that form an approximately right angle with the end surface 4, and the transparent plate 1 has an end surface 4
This is because it is necessary for the light to reach the diffusion system 5 with a certain probability and a part of the light to be emitted from the light emitting surface 2 while traveling further from.
【００１０】透明板１を構成する面がすべて鏡面である
ことが望ましいのは、透明板１が板状であるため出光面
２、反出光面３に対して他の面は面積が小さいため寄与
は少ないが、それでも全反射の効果により光線が透明板
１中にとどまる確率が大きくなり、結果として出光効率
が上がることによる。例えば透明板１として概長方形の
アクリル樹脂板を用いた場合、臨界角が約４２度である
ため、端面４より入射した光線は拡散系５に到達しない
限り、端面４の反対側の端面以外からは出光しないこと
になる。It is desirable that all the surfaces constituting the transparent plate 1 are mirror surfaces because the transparent plate 1 is plate-shaped and the other surfaces have a small area with respect to the light emitting surface 2 and the non-light emitting surface 3. However, the probability of light rays staying in the transparent plate 1 is increased due to the effect of total reflection, and as a result, the light emission efficiency is increased. For example, when a substantially rectangular acrylic resin plate is used as the transparent plate 1, since the critical angle is about 42 degrees, light rays incident from the end face 4 will come from other than the end face on the opposite side of the end face 4 unless they reach the diffusion system 5. Will not come out.
【００１１】透明板１の端面４には光源６が隣接配置さ
れる。光源６として、蛍光管を用いる。光源としては白
熱灯、線状に配列された発光ダイオード、光ファイバー
により導入された光等何でもよいが、発光効率、色、取
り扱い等の条件により蛍光管が適している。光源６は透
明板１の端面４の一面あるいは二面以上、最大で全周に
配置され、光源６からの光線は、透明板１に導かれる。A light source 6 is arranged adjacent to the end surface 4 of the transparent plate 1. A fluorescent tube is used as the light source 6. The light source may be any incandescent lamp, linearly arranged light emitting diodes, light introduced by an optical fiber, or the like, but a fluorescent tube is suitable depending on conditions such as luminous efficiency, color, and handling. The light source 6 is arranged on one surface or two or more surfaces of the end surface 4 of the transparent plate 1, and at most the entire circumference, and the light beam from the light source 6 is guided to the transparent plate 1.
【００１２】透明板１の出光面２側にはプリズムシート
７を重ねて配置し、反出光面３側には光反射シート９を
配置している。プリズムシート７および光反射シート９
は透明板１に対してわずかな空気層を介して配置されて
おり、この空気層は前述した臨界角による全反射のため
に必要である。プリズムシート７は出光面２より出光し
た光線を出光面２に概垂直に多く分布した方向に屈折を
する作用を持つ。A prism sheet 7 is placed on the transparent plate 1 on the light emitting surface 2 side, and a light reflecting sheet 9 is placed on the side opposite to the light emitting surface 3. Prism sheet 7 and light reflection sheet 9
Are arranged with respect to the transparent plate 1 through a slight air layer, and this air layer is necessary for total reflection due to the critical angle described above. The prism sheet 7 has a function of refracting light rays emitted from the light emitting surface 2 in a direction in which a large number of rays are distributed substantially perpendicularly to the light emitting surface 2.
【００１３】光反射シート９は、拡散系５で拡散したの
ち出光面２で反射し反出光面３を通過した光線、プリズ
ムシート７により反射して透明板１を通過した光線等を
さらにプリズムシート７側に戻す働きをする。The light reflecting sheet 9 further diffuses the light rays that have been diffused by the diffusing system 5 and then reflected by the light exit surface 2 and passed through the opposite light exit surface 3 and the light rays reflected by the prism sheet 7 and passed through the transparent plate 1 and the like. It works to return to 7 side.
【００１４】また光源６を覆うようにして反射シート１
０が配置される。反射シート１０は光源６からの光線を
端面４に導く働きをし、白色または銀、アルミニウム等
を表面に蒸着したプラスチックシート、成形品等が用い
られる。Further, the reflection sheet 1 covers the light source 6.
0 is placed. The reflection sheet 10 functions to guide the light beam from the light source 6 to the end surface 4, and a plastic sheet, a molded product, or the like having white or silver or aluminum vapor-deposited on the surface is used.
【００１５】プリズムシート７にはポリカーボネート樹
脂、アクリル樹脂等が用いられ、片面は概平面、もう一
面は頂角が概ね８０度から１００度である連続したプリ
ズム構造をなしている。プリズムシート７の平面側を透
明板１の出光面２に向けて配置する。これにより出光面
２より出た光線はプリズムシート７の平面側より入光し
プリズム面から出光面２に対して、より高い角度に屈折
し、すなわち出光した光線を出光面２に概垂直に多く分
布した方向に屈折をする作用を持つ。このプリズムシー
ト７の効果により、プリズムシートを使用しないときに
比べ、正面より見たときの輝度を２０％から５０％程度
上げることができる。Polycarbonate resin, acrylic resin, or the like is used for the prism sheet 7, and one surface has a substantially flat surface and the other surface has a continuous prism structure having an apex angle of about 80 to 100 degrees. The flat side of the prism sheet 7 is arranged so as to face the light emitting surface 2 of the transparent plate 1. As a result, the light rays emitted from the light emitting surface 2 enter from the flat surface side of the prism sheet 7 and are refracted from the prism surface to the light emitting surface 2 at a higher angle, that is, the emitted light rays are substantially perpendicular to the light emitting surface 2. It has the effect of refracting in the distributed direction. Due to the effect of the prism sheet 7, the brightness when viewed from the front can be increased by about 20% to 50% as compared with the case where the prism sheet is not used.
【００１６】光反射シート９には白色に着色した、また
は銀、アルミニウム等を表面に蒸着したポリエチレンテ
レフタレート樹脂等プラスチックシート、成形品等が用
いられ、片面は概平面、もう一面は頂角が１００度から
１７０度である連続したプリズム構造をなしている。光
反射シート９のプリズム面側を透明板１の反出光面３に
向けて配置する。As the light reflection sheet 9, a plastic sheet such as polyethylene terephthalate resin colored white or vapor-deposited with silver, aluminum or the like, a molded article or the like is used. One side is approximately flat and the other side has an apex angle of 100. It has a continuous prism structure with a degree of 170 degrees. The prism surface side of the light reflection sheet 9 is arranged so as to face the light exit surface 3 of the transparent plate 1.
【００１７】プリズムシート７は前述のとおり出光面２
に対し低い角度で出光した光線、すなわちプリズムシー
ト７の平面側へ低い角度にて入射した光に対しては、プ
リズムシート７のプリズム面側から、より高い角度で出
光するが、高い角度において入射した光線はプリズムシ
ート７のプリズム面において２回全反射され、再び入射
した方向に戻ってしまう。プリズムシート７のプリズム
面の頂角が９０度の場合、出光面２に対しての角度がポ
リカーボネート樹脂ではおよそ８０度以上、アクリル樹
脂ではおよそ８４度以上では、プリズム面側に出光され
ず、透明板１側に戻ってしまうことになる。これは透明
板１の出光面２から出光する光線の１０％から２０％に
およぶ。The prism sheet 7 is provided on the light emitting surface 2 as described above.
On the other hand, a light beam emitted at a low angle, that is, a light beam incident on the plane side of the prism sheet 7 at a low angle is emitted from the prism surface side of the prism sheet 7 at a higher angle, but is incident at a higher angle. The reflected light beam is totally reflected twice on the prism surface of the prism sheet 7 and returns to the incident direction again. When the apex angle of the prism surface of the prism sheet 7 is 90 degrees, if the angle with respect to the light emitting surface 2 is about 80 degrees or more for the polycarbonate resin and about 84 degrees or more for the acrylic resin, the light is not emitted to the prism surface side and is transparent. It will return to the board 1 side. This covers from 10% to 20% of the light emitted from the light emitting surface 2 of the transparent plate 1.
【００１８】プリズムシート７のプリズム面により反射
した光線は概ね透明板１を通過し、光反射シート９に到
達する。このとき、光反射シート９の反射面が反出光面
３に対して角度を持たない場合、光反射シート９におい
て反射する光線の多くは再びプリズムシート７において
反射されることになり、無駄が多い。ここで、光反射シ
ート９の反射面が反出光面３に対して角度を持つと、光
反射シート９による反射光線はプリズムシート７に低い
角度にて入光して、プリズム面より出光することができ
る。The light rays reflected by the prism surface of the prism sheet 7 almost pass through the transparent plate 1 and reach the light reflecting sheet 9. At this time, if the reflecting surface of the light reflecting sheet 9 does not have an angle with respect to the light-reflective surface 3, most of the light rays reflected by the light reflecting sheet 9 will be reflected again by the prism sheet 7, and there is much waste. . Here, when the reflecting surface of the light reflecting sheet 9 has an angle with respect to the light exiting surface 3, the light rays reflected by the light reflecting sheet 9 enter the prism sheet 7 at a low angle and exit from the prism surface. You can
【００１９】このとき、プリズムシート７により反射し
た光線は出光面２の法線方向に対して１０度以内である
ので、光反射シート９のプリズム構造の頂角は１６０度
以下であるときに効率がよい。また、１２０度以下であ
ると、光反射シート９のプリズム面にて反射した光線の
一部または大部分がそもそも反射したプリズム面の対向
する面に当たるため、また効率が低下する。よって、実
験的には頂角が１００度から１７０度において正面輝度
の上昇がみられるが、効率の良さからの観点からは１２
０度から１６０度の範囲にあることが望ましい。このと
き光反射シート９の効果により、プリズム構造を使用し
ないときに比べ、正面より見たときの輝度を１０〜２０
％程度上げることができる。At this time, since the light rays reflected by the prism sheet 7 are within 10 degrees with respect to the normal direction of the light exit surface 2, the efficiency is obtained when the apex angle of the prism structure of the light reflecting sheet 9 is 160 degrees or less. Is good. On the other hand, when the angle is 120 degrees or less, a part or most of the light rays reflected by the prism surface of the light reflection sheet 9 hit the opposite surfaces of the reflected prism surface in the first place, and the efficiency is lowered. Therefore, experimentally, the front luminance is increased when the apex angle is 100 degrees to 170 degrees, but it is 12 from the viewpoint of efficiency.
It is desirable to be in the range of 0 to 160 degrees. At this time, due to the effect of the light reflection sheet 9, the brightness when viewed from the front is 10 to 20 as compared with the case where the prism structure is not used.
It can be increased by about%.
【００２０】プリズムシート７のさらに上面には拡散シ
ート８を配置する。プリズムシート７のプリズム面の臨
界角により、それ以上となる角度において、急激に光線
を放射しなくなり、実際の現象としては、照明装置の正
面から角度を振って見た場合に、ある角度において急激
に暗くなるため、拡散シート８によってそれらを緩和し
ている。拡散シート８としては、シボを施したポリカー
ボネート樹脂のシート等が用いられる。A diffusion sheet 8 is disposed on the upper surface of the prism sheet 7. Due to the critical angle of the prism surface of the prism sheet 7, the light rays do not suddenly radiate at an angle larger than that, and as a practical phenomenon, when the angle is swung from the front of the illuminating device, the light suddenly increases at a certain angle. Since it becomes dark, the diffusion sheet 8 relaxes them. As the diffusion sheet 8, a textured polycarbonate resin sheet or the like is used.
【００２１】[0021]
【発明の効果】本発明によると、以上説明したように、
プリズムシートとプリズム構造を有する光反射シートを
組合せることにより、プリズムシートと光反射シートの
間で反射を繰り返すような、出光面に垂直方向の光線を
有効に出光でき、簡単な構成にて従来より高輝度な照明
装置を提供することができる。According to the present invention, as described above,
By combining a prism sheet and a light-reflecting sheet with a prism structure, it is possible to effectively emit light rays in the direction perpendicular to the light-exiting surface, such as repeated reflections between the prism sheet and the light-reflecting sheet, and with a simple structure. A lighting device with higher brightness can be provided.
【００２２】特に、本発明の照明装置は、液晶表示装置
用の面照明装置として有用である。In particular, the lighting device of the present invention is useful as a surface lighting device for a liquid crystal display device.
【図１】本発明の一実施例を示す透視図。FIG. 1 is a perspective view showing an embodiment of the present invention.
【図２】本発明の一実施例を示す断面図。FIG. 2 is a sectional view showing an embodiment of the present invention.
【図３】従来の技術を示す断面図。FIG. 3 is a sectional view showing a conventional technique.
１ ‥‥‥ 透明板 ５ ‥‥‥ 拡散系 ６ ‥‥‥ 光源 ７ ‥‥‥ プリズムシート ９ ‥‥‥ 光反射シート 1 ・ ・ ・ Transparent plate 5 ‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥
Claims (2)
と、該透明板の端面に隣接配置した光源と、表面に細か
いプリズム構造を連続的に形成した透明シートを該透明
板の出光面に重ねて配置した照明装置において、前記透
明板の出光面に対向する面に、表面に細かいプリズム構
造を連続的に形成した白色または鏡面を持った反射シー
トを重ねて配置したことを特徴とする照明装置。1. A transparent plate provided with a milky white diffusion layer, a light source disposed adjacent to an end face of the transparent plate, and a transparent sheet having a fine prism structure continuously formed on the surface thereof. In the illuminating device arranged so as to be overlapped with each other, a reflecting sheet having a white or mirror surface in which a fine prism structure is continuously formed on the surface is arranged so as to be overlapped with a surface facing the light emitting surface of the transparent plate. Lighting equipment.
の頂角が１２０度から１６０度であることを特徴とする
請求項１記載の照明装置。2. The illumination device according to claim 1, wherein the prism structure formed on the reflection sheet has an apex angle of 120 to 160 degrees.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4184975A JPH0627327A (en) | 1992-07-13 | 1992-07-13 | Lighting equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4184975A JPH0627327A (en) | 1992-07-13 | 1992-07-13 | Lighting equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0627327A true JPH0627327A (en) | 1994-02-04 |
Family
ID=16162622
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4184975A Pending JPH0627327A (en) | 1992-07-13 | 1992-07-13 | Lighting equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0627327A (en) |
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07225320A (en) * | 1994-02-10 | 1995-08-22 | Enplas Corp | Surface light source device |
| US5521725A (en) * | 1993-11-05 | 1996-05-28 | Alliedsignal Inc. | Illumination system employing an array of microprisms |
| US5555329A (en) * | 1993-11-05 | 1996-09-10 | Alliesignal Inc. | Light directing optical structure |
| JPH09197402A (en) * | 1996-01-16 | 1997-07-31 | Taiho Ind Co Ltd | Back light for liquid crystal panel and reflection sheet |
| US5868486A (en) * | 1995-03-31 | 1999-02-09 | Enplas Corporation | Surface light source device |
| JP2000214460A (en) * | 1999-01-25 | 2000-08-04 | Sharp Corp | Back light device |
| US6129439A (en) * | 1993-11-05 | 2000-10-10 | Alliedsignal Inc. | Illumination system employing an array of multi-faceted microprisms |
| JP2001201614A (en) * | 1999-11-08 | 2001-07-27 | Keiwa Inc | Light diffusion sheet and back light unit using the same |
| KR20030055844A (en) * | 2001-12-27 | 2003-07-04 | 삼성전자주식회사 | Liquid crystal display apparatus |
| JP2004199882A (en) * | 2002-12-16 | 2004-07-15 | Fujitsu Kasei Kk | Surface illumination device and liquid crystal display device |
| US7026756B2 (en) | 1996-07-29 | 2006-04-11 | Nichia Kagaku Kogyo Kabushiki Kaisha | Light emitting device with blue light LED and phosphor components |
| KR100845250B1 (en) * | 2001-12-21 | 2008-07-10 | 엘지디스플레이 주식회사 | Backlight unit |
| WO2009085543A1 (en) * | 2007-12-20 | 2009-07-09 | 3M Innovative Properties Company | Backlight reflectors having a prismatic structure |
| JP2010277903A (en) * | 2009-05-29 | 2010-12-09 | Teijin Dupont Films Japan Ltd | Reflector for direct type backlight unit |
| WO2021117119A1 (en) * | 2019-12-10 | 2021-06-17 | 三菱電機株式会社 | Illumination device and diffusion body |
-
1992
- 1992-07-13 JP JP4184975A patent/JPH0627327A/en active Pending
Cited By (24)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6129439A (en) * | 1993-11-05 | 2000-10-10 | Alliedsignal Inc. | Illumination system employing an array of multi-faceted microprisms |
| US5521725A (en) * | 1993-11-05 | 1996-05-28 | Alliedsignal Inc. | Illumination system employing an array of microprisms |
| US5555329A (en) * | 1993-11-05 | 1996-09-10 | Alliesignal Inc. | Light directing optical structure |
| JPH07225320A (en) * | 1994-02-10 | 1995-08-22 | Enplas Corp | Surface light source device |
| US5868486A (en) * | 1995-03-31 | 1999-02-09 | Enplas Corporation | Surface light source device |
| JPH09197402A (en) * | 1996-01-16 | 1997-07-31 | Taiho Ind Co Ltd | Back light for liquid crystal panel and reflection sheet |
| US7126274B2 (en) | 1996-07-29 | 2006-10-24 | Nichia Corporation | Light emitting device with blue light LED and phosphor components |
| US7362048B2 (en) | 1996-07-29 | 2008-04-22 | Nichia Kagaku Kogyo Kabushiki Kaisha | Light emitting device with blue light led and phosphor components |
| US9130130B2 (en) | 1996-07-29 | 2015-09-08 | Nichia Corporation | Light emitting device and display comprising a plurality of light emitting components on mount |
| US7531960B2 (en) | 1996-07-29 | 2009-05-12 | Nichia Corporation | Light emitting device with blue light LED and phosphor components |
| US7026756B2 (en) | 1996-07-29 | 2006-04-11 | Nichia Kagaku Kogyo Kabushiki Kaisha | Light emitting device with blue light LED and phosphor components |
| US7071616B2 (en) | 1996-07-29 | 2006-07-04 | Nichia Kagaku Kogyo Kabushiki Kaisha | Light emitting device with blue light led and phosphor components |
| US7329988B2 (en) | 1996-07-29 | 2008-02-12 | Nichia Corporation | Light emitting device with blue light LED and phosphor components |
| US7215074B2 (en) | 1996-07-29 | 2007-05-08 | Nichia Corporation | Light emitting device with blue light led and phosphor components |
| JP2000214460A (en) * | 1999-01-25 | 2000-08-04 | Sharp Corp | Back light device |
| JP2001201614A (en) * | 1999-11-08 | 2001-07-27 | Keiwa Inc | Light diffusion sheet and back light unit using the same |
| KR100845250B1 (en) * | 2001-12-21 | 2008-07-10 | 엘지디스플레이 주식회사 | Backlight unit |
| KR20030055844A (en) * | 2001-12-27 | 2003-07-04 | 삼성전자주식회사 | Liquid crystal display apparatus |
| JP2004199882A (en) * | 2002-12-16 | 2004-07-15 | Fujitsu Kasei Kk | Surface illumination device and liquid crystal display device |
| WO2009085543A1 (en) * | 2007-12-20 | 2009-07-09 | 3M Innovative Properties Company | Backlight reflectors having a prismatic structure |
| US8721153B2 (en) | 2007-12-20 | 2014-05-13 | 3M Innovative Properties Company | Backlight reflectors having a prismatic structure |
| JP2010277903A (en) * | 2009-05-29 | 2010-12-09 | Teijin Dupont Films Japan Ltd | Reflector for direct type backlight unit |
| WO2021117119A1 (en) * | 2019-12-10 | 2021-06-17 | 三菱電機株式会社 | Illumination device and diffusion body |
| JPWO2021117119A1 (en) * | 2019-12-10 | 2021-12-09 | 三菱電機株式会社 | Lighting equipment and diffusers |
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