JPH04138651A - Fluorescent tube reflecting cover - Google Patents
Fluorescent tube reflecting coverInfo
- Publication number
- JPH04138651A JPH04138651A JP2262849A JP26284990A JPH04138651A JP H04138651 A JPH04138651 A JP H04138651A JP 2262849 A JP2262849 A JP 2262849A JP 26284990 A JP26284990 A JP 26284990A JP H04138651 A JPH04138651 A JP H04138651A
- Authority
- JP
- Japan
- Prior art keywords
- fluorescent tube
- resin material
- conductive filler
- flexible resin
- heat
- 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.)
- Granted
Links
- 239000000463 material Substances 0.000 claims abstract description 35
- 239000011347 resin Substances 0.000 claims abstract description 31
- 229920005989 resin Polymers 0.000 claims abstract description 31
- 239000011231 conductive filler Substances 0.000 claims abstract description 25
- 239000002245 particle Substances 0.000 claims description 13
- 229910052751 metal Inorganic materials 0.000 claims description 11
- 239000002184 metal Substances 0.000 claims description 11
- 229920002379 silicone rubber Polymers 0.000 claims description 11
- 239000004945 silicone rubber Substances 0.000 claims description 11
- 239000000203 mixture Substances 0.000 claims description 8
- 150000002484 inorganic compounds Chemical class 0.000 claims description 7
- 229910010272 inorganic material Inorganic materials 0.000 claims description 7
- 230000017525 heat dissipation Effects 0.000 claims description 6
- 229910044991 metal oxide Inorganic materials 0.000 claims description 5
- 150000004706 metal oxides Chemical class 0.000 claims description 5
- 150000004767 nitrides Chemical class 0.000 claims description 5
- 238000001579 optical reflectometry Methods 0.000 claims description 5
- 239000004973 liquid crystal related substance Substances 0.000 description 28
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 6
- 229920001971 elastomer Polymers 0.000 description 6
- 238000001125 extrusion Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 230000005855 radiation Effects 0.000 description 6
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 5
- 229920000642 polymer Polymers 0.000 description 5
- 239000012463 white pigment Substances 0.000 description 5
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 4
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 4
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- 239000002985 plastic film Substances 0.000 description 4
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 4
- 239000000853 adhesive Substances 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 239000000806 elastomer Substances 0.000 description 3
- 239000003973 paint Substances 0.000 description 3
- 239000000049 pigment Substances 0.000 description 3
- 239000005060 rubber Substances 0.000 description 3
- 238000004073 vulcanization Methods 0.000 description 3
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 2
- 239000005977 Ethylene Substances 0.000 description 2
- RRHGJUQNOFWUDK-UHFFFAOYSA-N Isoprene Chemical compound CC(=C)C=C RRHGJUQNOFWUDK-UHFFFAOYSA-N 0.000 description 2
- 239000003086 colorant Substances 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- PMHQVHHXPFUNSP-UHFFFAOYSA-M copper(1+);methylsulfanylmethane;bromide Chemical compound Br[Cu].CSC PMHQVHHXPFUNSP-UHFFFAOYSA-M 0.000 description 2
- 150000001993 dienes Chemical class 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000010292 electrical insulation Methods 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 239000010419 fine particle Substances 0.000 description 2
- 239000011888 foil Substances 0.000 description 2
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 2
- 229910052737 gold Inorganic materials 0.000 description 2
- 239000010931 gold Substances 0.000 description 2
- 230000000873 masking effect Effects 0.000 description 2
- 239000000178 monomer Substances 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 229920006255 plastic film Polymers 0.000 description 2
- 229910052709 silver Inorganic materials 0.000 description 2
- 239000004332 silver Substances 0.000 description 2
- 235000010215 titanium dioxide Nutrition 0.000 description 2
- VZSRBBMJRBPUNF-UHFFFAOYSA-N 2-(2,3-dihydro-1H-inden-2-ylamino)-N-[3-oxo-3-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)propyl]pyrimidine-5-carboxamide Chemical compound C1C(CC2=CC=CC=C12)NC1=NC=C(C=N1)C(=O)NCCC(N1CC2=C(CC1)NN=N2)=O VZSRBBMJRBPUNF-UHFFFAOYSA-N 0.000 description 1
- FRWYFWZENXDZMU-UHFFFAOYSA-N 2-iodoquinoline Chemical compound C1=CC=CC2=NC(I)=CC=C21 FRWYFWZENXDZMU-UHFFFAOYSA-N 0.000 description 1
- 229910052582 BN Inorganic materials 0.000 description 1
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 description 1
- 229920002943 EPDM rubber Polymers 0.000 description 1
- 230000006750 UV protection Effects 0.000 description 1
- LTPBRCUWZOMYOC-UHFFFAOYSA-N beryllium oxide Inorganic materials O=[Be] LTPBRCUWZOMYOC-UHFFFAOYSA-N 0.000 description 1
- MTAZNLWOLGHBHU-UHFFFAOYSA-N butadiene-styrene rubber Chemical compound C=CC=C.C=CC1=CC=CC=C1 MTAZNLWOLGHBHU-UHFFFAOYSA-N 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- -1 ethylene, propylene Chemical group 0.000 description 1
- 229920001973 fluoroelastomer Polymers 0.000 description 1
- 229920005560 fluorosilicone rubber Polymers 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 1
- 239000000395 magnesium oxide Substances 0.000 description 1
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000010445 mica Substances 0.000 description 1
- 229910052618 mica group Inorganic materials 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 description 1
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- 229920001897 terpolymer Polymers 0.000 description 1
- 125000000383 tetramethylene group Chemical group [H]C([H])([*:1])C([H])([H])C([H])([H])C([H])([H])[*:2] 0.000 description 1
- 229920002725 thermoplastic elastomer Polymers 0.000 description 1
- 238000007740 vapor deposition Methods 0.000 description 1
Landscapes
- Liquid Crystal (AREA)
- Planar Illumination Modules (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は蛍光管の反射カバーに関する。さらに詳しくは
、液晶表示素子などに用いられるバックライトとして有
用な蛍光管（冷陰極管）の反射カバーに関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a reflective cover for a fluorescent tube. More specifically, the present invention relates to a reflective cover for a fluorescent tube (cold cathode tube) useful as a backlight used in a liquid crystal display device or the like.
［従来の技術］
液晶表示素子、とくに液晶表示パネルは、ラップトツブ
パソコン、ワープロ、液晶テレビ、ポケット液晶テレビ
などに広（用いられている。液晶表示パネルは、自己発
光機能がないので、暗い場所では表示は見にくく、また
複雑な表示をするとコントラストが悪く、解像できない
という問題がある。このため液晶表示パネルの裏面に光
源を置き、暗所でも見易く、コントラストを良くする手
段が採られている。この光源をバックライト方式といい
、高輝度蛍光管（冷陰極間）が使用されている。とくに
バックライトとしてもっばら使用されているのは白色蛍
光管である。この理由は下記の通りである。[Prior Art] Liquid crystal display elements, especially liquid crystal display panels, are widely used in laptop computers, word processors, liquid crystal televisions, pocket liquid crystal televisions, etc. Liquid crystal display panels do not have a self-luminous function, so they cannot be used in dark places. The display is difficult to see, and complex displays have poor contrast and resolution.This is why a light source is placed on the back of the LCD panel to make it easier to see even in the dark and to improve contrast. This light source is called a backlight method, and uses high-intensity fluorescent tubes (between cold cathodes).White fluorescent tubes are most commonly used as backlights.The reasons for this are as follows. be.
■ 光量の割に発熱量が少ない。■ The amount of heat generated is low compared to the amount of light.
■ 蛍光管全体が同一光量発光するので、その斑が少な
い。■ Since the entire fluorescent tube emits the same amount of light, there are fewer spots.
■ 光源としての寿命が長い、等が挙げられる。■ It has a long life as a light source.
そして光源から発光された光を有効に活用し、コントラ
スを向上させ、消費電力を減らし、バッテリーの消費を
減少させ、小型軽量化のため効率の良い蛍光管の反射板
が要請されている。すなわち発光した光を液晶パネル側
へ集光させ、後ろ側へ逃がさないような効率の良い蛍光
管の反射板が要請されている。There is a need for an efficient fluorescent tube reflector that effectively utilizes the light emitted from the light source, improves contrast, reduces power consumption, reduces battery consumption, and reduces size and weight. In other words, there is a need for an efficient fluorescent tube reflector that focuses the emitted light toward the liquid crystal panel and prevents it from escaping to the rear.
従来技術としては、蛍光管そのものに白色塗料を塗布す
る技術、アルミ箔、白色プラスチックフィルム、白色プ
ラスチックシートなどを接着剤を用いて貼り付ける技術
、または蛍光管の内側にコーティングなどの反射層を設
ける技術等が知られている。さらに本出願人はすでに特
願平１−１６７２５５号において、シリコーンゴムなど
を用いた中空状蛍光管反射カバーを提案している。Conventional techniques include applying white paint to the fluorescent tube itself, pasting aluminum foil, white plastic film, white plastic sheet, etc. with adhesive, or providing a reflective layer such as a coating on the inside of the fluorescent tube. The technology is known. Furthermore, the present applicant has already proposed a hollow fluorescent tube reflective cover using silicone rubber or the like in Japanese Patent Application No. 1-167255.
［発明が解決しようとする課題］
しかしながら前記した従来技術は、手間がかかり過ぎ量
産性、精密加工性に欠け、量産性に欠けるという課題が
あった。すなわち、蛍光管そのものに白色塗料を塗布す
る技術は、マスキングテープを蛍光管に一直線に張るこ
とが難しく、またマスキングテープの境界面で塗料が浸
みだし直線に塗布することが困難であった。またアルミ
箔、白色プラスチックフィルム、白色プラスチックシー
トなどを接着剤を用いて貼り付ける技術は、前記同様−
直線に貼ることが困難で、曲ったときに手直しが効かな
いという決定的な問題点があり、フィルムなどが剥げて
くるといった課題もあった。[Problems to be Solved by the Invention] However, the above-mentioned conventional technology has the problem that it is too time-consuming and lacks mass productivity and precision machinability. That is, with the technique of applying white paint to the fluorescent tube itself, it was difficult to apply the masking tape to the fluorescent tube in a straight line, and the paint oozed out at the boundary surface of the masking tape, making it difficult to apply it in a straight line. In addition, the technology of pasting aluminum foil, white plastic film, white plastic sheet, etc. using adhesive is similar to the above-mentioned method.
It was difficult to apply it in a straight line, and there was a definite problem that it was impossible to retouch it if it bent, and there was also the problem that the film would peel off.
さらに蛍光管の内側に反射層を設ける技術は、加工コス
トが高く、汎用性に欠け、液晶パネルのサイズ毎に蛍光
管の製造工程まで戻って設計し直さなければならないと
いう課題があった。さらに特願平１−１６７２５５号の
発明は、前記従来技術を改善できる一定の効果を奏する
ものの、蛍光管の種類によっては蓄熱してしまい、液晶
表示素子の画像特性に影響を与えてしまうという新たな
課題があった。Furthermore, the technique of providing a reflective layer on the inside of a fluorescent tube requires high processing costs, lacks versatility, and requires going back to the fluorescent tube manufacturing process and redesigning it for each size of liquid crystal panel. Furthermore, although the invention of Japanese Patent Application No. 1-167255 has a certain effect of improving the above-mentioned conventional technology, it has a new feature that depending on the type of fluorescent tube, heat may accumulate, which may affect the image characteristics of the liquid crystal display element. There was a problem.
本発明は、前記した従来技術の課題を解決するため、反
射効率と集光性、及び精密加工性、量産性に優れ、しか
も熱伝導性に優れた蛍光管反射カバーを提供することを
目的とする。SUMMARY OF THE INVENTION In order to solve the problems of the prior art described above, the present invention aims to provide a reflective cover for fluorescent tubes that has excellent reflection efficiency, light gathering ability, precision workability, and mass productivity, as well as excellent thermal conductivity. do.
［課題を解決するための手段］
前記目的を達成するため本発明の蛍光管反射カバーは、
光反射性を有する可撓性樹脂材料で構成され、内部に蛍
光管を収めるための中空部を備えているとともに、中空
部の一部が光進路用開口部を備え、蛍光管に接する面が
平滑である蛍光管反射カバーであって、前記可撓性樹脂
材料中に熱伝導性フィラーを存在させたことを特徴とす
る。[Means for Solving the Problems] In order to achieve the above object, the fluorescent tube reflective cover of the present invention has the following features:
It is made of a flexible resin material with light reflection properties, and has a hollow part for housing the fluorescent tube inside, and a part of the hollow part has an opening for the light path, and the surface in contact with the fluorescent tube is The reflective cover for fluorescent tubes is smooth and is characterized in that a thermally conductive filler is present in the flexible resin material.
前記本発明の構成においては、熱伝導性フィラーを存在
させた可撓性樹脂材料組成物の熱伝導率を、ｌ０ＸＩＯ
〜７０ｘｌＯ−４（ｃａｌ／ｃｍ・秒・℃）の範囲とす
ることが好ましい。In the configuration of the present invention, the thermal conductivity of the flexible resin material composition in which the thermally conductive filler is present is 10XIO
It is preferable to set it as the range of -70xlO-4 (cal/cm*sec*degreeC).
また前記本発明の構成においては、可撓性樹脂材料がシ
リコーンゴムであり、熱伝導性フィラーが金属酸化物、
金属窒化物、および金属硼素化物から選ばれる少なくと
も一種以上の無機化合物であることが好ましい。Further, in the configuration of the present invention, the flexible resin material is silicone rubber, and the thermally conductive filler is a metal oxide,
It is preferably at least one inorganic compound selected from metal nitrides and metal borides.
また前記本発明の構成においては、熱伝導性フィラーが
平均粒子径の異なる２種類以上の無機化合物であること
が好ましい。Moreover, in the structure of the present invention, it is preferable that the thermally conductive filler is two or more kinds of inorganic compounds having different average particle diameters.
さらに前記本発明の構成においては、蛍光管反射カバー
の光進路用開口部以外の部分に熱放散手段を備えている
ことが好ましい。Further, in the configuration of the present invention, it is preferable that a heat dissipation means is provided in a portion of the fluorescent tube reflection cover other than the light path opening.
［作用コ
前記本発明の構成によれば、可撓性樹脂材料中に熱伝導
性フィラーを存在させているので、蛍光管が発熱しても
有効に熱を除去し、液晶表示素子に熱の影響を与えるこ
とを防止できる。また蛍光管の外側を、光反射性を有す
る可撓性樹脂材料を用いて蛍光管反射カバーとすること
により、蛍光管の光進路用開口部以外の実質的な部分が
密着状態で覆われているので、光の反射効率と集光性に
優れ、とくに液晶パネル用バックライトの蛍光管の反射
カバーとして適したものである。また、精密加工性に優
れ、光進路用開口部を直線に設けることができる。さら
に量産性に優れ安価に製造することができる。そのうえ
エラスチック特性を失うことなく、液晶パネルの組み立
て加工性を向上させることができる。[Function] According to the configuration of the present invention, since a thermally conductive filler is present in the flexible resin material, even if the fluorescent tube generates heat, the heat is effectively removed and the heat is not transferred to the liquid crystal display element. can be prevented from affecting the In addition, by forming a fluorescent tube reflective cover on the outside of the fluorescent tube using a flexible resin material that has light reflectivity, the substantial portion of the fluorescent tube other than the light path opening is tightly covered. Therefore, it has excellent light reflection efficiency and light condensing ability, and is particularly suitable as a reflective cover for fluorescent tubes in backlights for liquid crystal panels. Further, it has excellent precision machinability, and the opening for the optical path can be provided in a straight line. Furthermore, it has excellent mass productivity and can be manufactured at low cost. Moreover, the ease of assembling the liquid crystal panel can be improved without losing its elastic properties.
また、熱伝導性フィラーを存在させた可撓性樹脂材料組
成物の熱伝導率を、１０×１０４〜７０×１Ｏ−４（Ｃ
ａｌ／Ｃｍ・秒−’Ｃ）の範囲にするという本発明の好
ましい構成によれば、より有効な熱の除去を行うことが
できる。In addition, the thermal conductivity of the flexible resin material composition in which the thermally conductive filler was present was determined to be 10 x 104 to 70 x 1 O-4 (C
According to a preferred configuration of the present invention in which the temperature is in the range of al/Cm·sec-'C), more effective heat removal can be performed.
また、可撓性樹脂材料がシリコーンゴムであり、熱伝導
性フィラーが金属酸化物、金属窒化物、および金属硼素
化物から選ばれる少なくとも一種以上の化合物であると
いう本発明の好ましい構成によれば、電気絶縁性を有し
、かつより有効な熱の除去を行うことができる。Further, according to a preferred configuration of the present invention, the flexible resin material is silicone rubber, and the thermally conductive filler is at least one compound selected from metal oxides, metal nitrides, and metal borides. It has electrical insulation properties and can remove heat more effectively.
また、熱伝導性フィラーが平均粒子径の異なる２種類以
上の無機化合物であるという本発明の好ましい構成によ
れば、熱伝導性フィラーの充填量を多くでき、より有効
な熱の除去を行うことができる。Further, according to the preferred configuration of the present invention in which the thermally conductive filler is two or more types of inorganic compounds having different average particle diameters, the amount of the thermally conductive filler filled can be increased, and heat can be removed more effectively. I can do it.
さらに、蛍光管反射カバーの光進路用開口部以外の部分
に熱放散手段を備えているという本発明の好ましい構成
によれば、積極的な冷却を行うことができる。Furthermore, according to a preferred configuration of the present invention in which a portion of the fluorescent tube reflective cover other than the light path opening is provided with heat dissipation means, active cooling can be performed.
［実施例］ 以下実施例を用いて本発明をさらに具体的に説明する。[Example] The present invention will be explained in more detail below using Examples.
なお本発明は下記の実施例に限定されるものではない。Note that the present invention is not limited to the following examples.
本発明において可撓性樹脂材料とは、ゴム弾性を有する
材料であればいかなるものでもよい。たとえばシリコー
ンゴム、フロロシリコーンゴム、フッ素ゴム、ポリウレ
タン、熱可塑性プラスチックエラストマー（たとえばス
チレン・ブタジェンのブロック重合エラストマー、スチ
レン・イソプレンのブロック重合エラストマー、スチレ
ン・エチレン・ブチレンのブロック重合エラストマーな
ど）、ＥＰＴ（エチレン・プロピレン・ジエン系モノマ
ーからなる三元共重合体ポリマー）、ＥＰＤＭ（エチレ
ン・プロピレン・非共役のジエン系モノマーを共重合さ
せ、分子内に加硫に利用し得る不飽和結合を残した共重
合体ポリマー）などである。このうち好ましくは耐熱温
度が１５０℃以上のもので、耐候性・耐紫外線性に優れ
る樹脂である。かかる観点から、とくに好ましい樹脂材
料はシリコーンゴムである。In the present invention, the flexible resin material may be any material as long as it has rubber elasticity. For example, silicone rubber, fluorosilicone rubber, fluororubber, polyurethane, thermoplastic elastomers (such as styrene/butadiene block polymer elastomers, styrene/isoprene block polymer elastomers, styrene/ethylene/butylene block polymer elastomers, etc.), EPT (ethylene・Terpolymer polymer consisting of propylene and diene monomer), EPDM (a copolymer made by copolymerizing ethylene, propylene, and a non-conjugated diene monomer, leaving unsaturated bonds in the molecule that can be used for vulcanization) polymers), etc. Among these, resins with a heat resistance temperature of 150° C. or higher and excellent weather resistance and ultraviolet resistance are preferred. From this point of view, a particularly preferred resin material is silicone rubber.
次に本発明においては、可撓性樹脂材料中に熱伝導性フ
ィラーを存在させる。ここで熱伝導性フィラーとは、可
撓性樹脂材料組成物の熱伝導率を下げるものであればい
かなるものでもよいが、好ましくは可撓性樹脂材料組成
物の熱伝導率を１０×１０〜７０Ｘ４０−４（Ｃａｌ／
Ｃｍ・秒−℃）の範囲にするものである。より好ましく
は、可撓性樹脂材料組成物の熱伝導率は３０Ｘ１０’〜
６ｏｘ１ｏ−４（ｃａ １／ｃｍ・秒・℃）の範囲であ
る。Next, in the present invention, a thermally conductive filler is present in the flexible resin material. Here, the thermally conductive filler may be any material as long as it lowers the thermal conductivity of the flexible resin material composition, but preferably the thermal conductivity of the flexible resin material composition is 10x10 to 10. 70X40-4 (Cal/
Cm/sec - °C). More preferably, the thermal conductivity of the flexible resin material composition is 30X10'~
It is in the range of 6ox1o-4 (ca 1/cm·sec·°C).
熱伝導性フィラーは、好ましくは金属酸化物、金属窒化
物、および金属硼素化物から選ばれる少なくとも一種以
上の無機化合物である。たとえば酸化アルミニウム、酸
化マグネシウム、酸化ベリリウム、窒化アルミニウム、
ボロンナイトライドなどである。熱伝導性フィラーの平
均粒子径は、蛍光管反射カバーの表面が平滑性を失わな
い程度であればいかなるものでもよい。たとえば１〜１
００μｍの平均粒子直径のものである。また、充填量を
多くするためには、平均粒子直径の異なった２種類以上
のフィラーを用いるのが好ましい。The thermally conductive filler is preferably at least one inorganic compound selected from metal oxides, metal nitrides, and metal borides. For example, aluminum oxide, magnesium oxide, beryllium oxide, aluminum nitride,
Examples include boron nitride. The average particle diameter of the thermally conductive filler may be any value as long as the surface of the fluorescent tube reflective cover does not lose its smoothness. For example 1-1
00 μm average particle diameter. Furthermore, in order to increase the filling amount, it is preferable to use two or more types of fillers having different average particle diameters.
さらに、電気絶縁フィラーを用いるのが好ましい。Furthermore, it is preferable to use electrically insulating fillers.
熱伝導性フィラーの添加量は任意の範囲を採用できる。The amount of the thermally conductive filler added can be within any range.
次に本発明において光反射性を有する可撓性樹脂材料と
は、前記樹脂材料もしくはその組成物が蛍光管から発光
される光を反射する特性を有するものであればいかなる
ものであっても良い。好ましい反射率は５０％以上であ
る。この反射特性を付与するためには、たとえば前記樹
脂材料に白色顔料、パール−マイカ顔料、銀または金色
などの顔料や着色剤などを混合させる手段がある。−例
としてシリコーンゴムについて説明すると、酸化チタン
の白色顔料を用いた場合、酸化チタンは０２５〜５０重
量部混合すると白色に着色され、反射特性が適用範囲と
なる。その他の好ましい反射手段としては、前記樹脂材
料の蛍光管と接触する面に白色顔料、銀または金色など
の顔料や着色剤などを塗布したり、蒸着やスパッタリン
グで反射層を作ることである。たとえばアルミなどの金
属の蒸着を行なえば全反射、または全反射に近い反射を
させることもできる。Next, in the present invention, the flexible resin material having light reflectivity may be any material as long as the resin material or its composition has the property of reflecting light emitted from a fluorescent tube. . A preferable reflectance is 50% or more. In order to impart this reflective property, there is a method of mixing, for example, a white pigment, a pearl-mica pigment, a silver or gold pigment or a coloring agent with the resin material. - To explain silicone rubber as an example, when a white pigment of titanium oxide is used, when 0.25 to 50 parts by weight of titanium oxide is mixed, it is colored white and the reflection properties fall within the applicable range. Other preferred reflective means include applying a white pigment, silver or gold pigment or coloring agent to the surface of the resin material that comes into contact with the fluorescent tube, or forming a reflective layer by vapor deposition or sputtering. For example, if metal such as aluminum is vapor-deposited, total reflection or reflection close to total reflection can be achieved.
次に本発明においては、内部に蛍光管を収めるための中
空部を備えているとともに、中空部の一部が光進路用開
口部を備えていることが必要である。光進路用開口部を
液晶表示パネルのバックライトとして機能させるためで
ある。光進路用開口部の大きさは任意のものとすること
ができるが、好ましい大きさは、中心部を基点として約
７５゜±２°の範囲の開口角である。均一光を照射させ
るためである。Next, in the present invention, it is necessary to have a hollow part for accommodating a fluorescent tube therein, and a part of the hollow part to have an opening for a light path. This is to allow the light path opening to function as a backlight for the liquid crystal display panel. Although the size of the light path opening can be arbitrary, a preferable size is an aperture angle in the range of about 75°±2° from the center. This is to irradiate uniform light.
また中空形状の内径は、−例として直径５〜２０ｍｍの
範囲であり、長さは任意のものとすることができる。カ
バーの厚さは任意の厚さとすることができる。The inner diameter of the hollow shape is, for example, in the range of 5 to 20 mm, and the length can be arbitrary. The thickness of the cover can be any thickness.
次に本発明の蛍光管反射カバーは、蛍光管に接する面が
平滑である。蛍光管に密着させ、接着剤などを用いずに
一体化させるのが、カバー取り付けに便利だからである
。前記平滑面は好ましくは鏡面である。より密着性に優
れるからである。平滑面、鏡面に仕上げるためには、シ
リコーンゴムの場合、押し出しダイスの表面を磨き上げ
ることによって作成できる。Next, the fluorescent tube reflective cover of the present invention has a smooth surface that comes into contact with the fluorescent tube. This is because it is convenient to attach the cover to the fluorescent tube and to integrate it without using adhesive. The smooth surface is preferably a mirror surface. This is because it has better adhesion. In the case of silicone rubber, a smooth, mirror-like finish can be achieved by polishing the surface of the extrusion die.
本発明において樹脂材料のゴム硬度は２０〜９０度が好
ましく、とくに６０〜８０度の範囲が好ましい。さらに
ゴム硬度は肉厚が薄い場合は高く、応力も高い材料が好
ましく、肉厚が大きい場合は硬度は低（、応力も低い材
料が好ましい。In the present invention, the rubber hardness of the resin material is preferably 20 to 90 degrees, particularly preferably 60 to 80 degrees. Furthermore, when the wall thickness is thin, a material with high rubber hardness and high stress is preferable, and when the wall thickness is large, a material with low hardness (and low stress) is preferable.
本発明の反射カバーは、押出成型加工、プレス成型加工
、インジェクション成型加工など、その製造手段はどの
ようなものであっても良い。The reflective cover of the present invention may be manufactured by any method such as extrusion molding, press molding, injection molding, etc.
以下図面を用いて本発明をさらに具体的に説明する。第
１〜３図は本発明の一実施例の断面図を示すものである
。The present invention will be explained in more detail below using the drawings. 1 to 3 show cross-sectional views of one embodiment of the present invention.
第１図において、１は光反射性を有する可撓性樹脂材料
で構成され、内部に蛍光管を収めるための中空部を備え
た蛍光管反射カバー、２は蛍光管、３は光進路用開口部
、４は液晶表示パネル面である。In Fig. 1, 1 is a fluorescent tube reflective cover made of a flexible resin material with light reflectivity and has a hollow part for housing a fluorescent tube inside, 2 is a fluorescent tube, and 3 is an opening for a light path. Section 4 is the surface of the liquid crystal display panel.
以上のように構成された蛍光管反射カバー１について、
以下その作用を説明する。Regarding the fluorescent tube reflection cover 1 configured as above,
The effect will be explained below.
蛍光管２から発生する光は、光進路用開口部３から液晶
表示パネル面４の裏面に照射される。このバックライト
により液晶表示パネル面４は均一に明るい状態に保たれ
る。そして蛍光管２からは僅かの発熱があっても、蛍光
管反射カバー１は熱伝導性に優れるので、効果的に放熱
される。その結果、液晶表示パネル面４が異常に高温に
なることを防げ、蛍光管の発する熱エネルギーによる液
晶成分の変化を防止でき、液晶表示面のコントラスト（
明暗）の変動も防止できる。液晶成分は温度によって結
晶構造などが微妙に変化する性質を有しているので、温
度を一定に保つことは重要なことである。Light generated from the fluorescent tube 2 is irradiated onto the back surface of the liquid crystal display panel surface 4 through the light path opening 3. This backlight keeps the liquid crystal display panel surface 4 uniformly bright. Even if a small amount of heat is generated from the fluorescent tube 2, the fluorescent tube reflective cover 1 has excellent thermal conductivity, so the heat is effectively radiated. As a result, the liquid crystal display panel surface 4 can be prevented from becoming abnormally high temperature, the liquid crystal components can be prevented from changing due to the thermal energy emitted by the fluorescent tubes, and the contrast of the liquid crystal display surface (
Fluctuations in brightness and darkness can also be prevented. Since the liquid crystal component has the property that its crystal structure changes slightly depending on the temperature, it is important to keep the temperature constant.
第２図は本発明の別の実施例の断面図を示す。FIG. 2 shows a cross-sectional view of another embodiment of the invention.
第１図と異なる点は、蛍光管反射カバー１の裏面に放熱
フィン５を備えていることである。この放熱フィン５に
よって、より効率良く放熱を行うことができる。The difference from FIG. 1 is that a radiation fin 5 is provided on the back surface of the fluorescent tube reflective cover 1. The heat radiation fins 5 can radiate heat more efficiently.
また第３図は、第２図の放熱フィン５に代えて放熱プレ
ート６を備えていることである。この放熱プレート６に
よって、より効率良く放熱を行うことができる。Furthermore, FIG. 3 is equipped with a heat radiation plate 6 in place of the heat radiation fins 5 of FIG. This heat radiation plate 6 allows for more efficient heat radiation.
以下具体的実施例を用いて説明する。This will be explained below using specific examples.
実施例１
シリコーンゴムベース１００重量部に、酸化チタン白色
顔料（チタン白）を２重量部と、２．２μｍの平均粒子
直径を有する微粒低ソーダアルミナ（酸化アルミニウム
）（商品名ＡＬ−４３Ｍ）を１１０重量部と、３．５μ
ｍの平均粒子直径を有する微粒低ソーダアルミナ（酸化
アルミニウム）（商品名ＡＬ−３０Ｍ）を１６０重量部
とを添加・混合した。次いで、蛍光管側に接する面の押
出ダイスの表面を鏡面に仕上げたダイスを用いて、押出
成型し、加熱加硫し、後熱処理して、第１図に示す断面
形状の蛍光管反射カバーを成形した。Example 1 100 parts by weight of a silicone rubber base, 2 parts by weight of titanium oxide white pigment (titanium white), and fine particles of low soda alumina (aluminum oxide) (trade name AL-43M) having an average particle diameter of 2.2 μm. 110 parts by weight and 3.5μ
160 parts by weight of fine low soda alumina (aluminum oxide) (trade name AL-30M) having an average particle diameter of m was added and mixed. Next, using an extrusion die whose surface in contact with the fluorescent tube side has been finished with a mirror finish, extrusion molding is performed, heat vulcanization, and post-heat treatment to obtain a fluorescent tube reflective cover having the cross-sectional shape shown in Figure 1. Molded.
得られた蛍光管反射カバーの熱伝導率は、４１Ｘ１０４
（Ｃａ１／ｃｍ・秒・℃）であった。The thermal conductivity of the obtained fluorescent tube reflective cover is 41X104
(Ca1/cm·sec·°C).
この反射カバーを用いて実際に液晶パネルのバックライ
トとして使用したところ、加熱防止でき、均一光も照射
でき、高品位な液晶表示が得られた。When this reflective cover was actually used as a backlight for a liquid crystal panel, it was able to prevent heating, irradiate uniform light, and obtain a high-quality liquid crystal display.
また、短絡も無く、安全性に優れたものであった。Further, there was no short circuit, and the safety was excellent.
実施例２
シリコーンゴムベース１００重量部に、酸化チタン白色
顔料（チタン白）を２重量部と、２．２μｍの平均粒子
直径を有する微粒低ソーダアルミナ（酸化アルミニウム
）（商品名ＡＬ−４３Ｍ）を１５０重量部と、３．５μ
ｍの平均粒子直径を有する微粒低ソーダアルミナ（酸化
アルミニウム）（商品名ＡＬ−３０Ｍ）を１５０重量部
と、窒化アルミニウム微粒子（粒子分布：直径２０μｍ
未満７７重量％、２０〜３２μｍ１９．８重量％、３２
〜４４μｍ３．２重量％、４４μｍ以上Ｏ以上％）を１
７０重量部とを添加・混合した。次いで、蛍光管側に接
する面の押出ダイスの表面を鏡面に仕上げたダイスを用
いて、押出成型し、加熱加硫し、後熱処理して、第２図
に示す断面形状の蛍光管反射カバーを成形した。Example 2 To 100 parts by weight of a silicone rubber base, 2 parts by weight of titanium oxide white pigment (titanium white) and fine particles of low soda alumina (aluminum oxide) (trade name AL-43M) having an average particle diameter of 2.2 μm were added. 150 parts by weight and 3.5μ
150 parts by weight of fine low soda alumina (aluminum oxide) (trade name AL-30M) having an average particle diameter of m and fine aluminum nitride particles (particle distribution: diameter 20 μm).
Less than 77% by weight, 20-32 μm 19.8% by weight, 32
~44μm3.2% by weight, 44μm or more O or more%) 1
70 parts by weight were added and mixed. Next, using an extrusion die whose surface in contact with the fluorescent tube side has been finished with a mirror finish, extrusion molding is carried out, heat vulcanization, and post-heat treatment to obtain a fluorescent tube reflective cover having the cross-sectional shape shown in Fig. 2. Molded.
得られた蛍光管反射カバーの熱伝導率は、５２Ｘ１０−
４（ｃ ａ １／ｃｍ ・秒拳℃）であった。The thermal conductivity of the obtained fluorescent tube reflective cover is 52X10-
4 (c a 1/cm ・second fist degree Celsius).
この反射カバーを用いて実際に液晶パネルのバックライ
トとして使用したところ、加熱防止でき、均一光も照射
でき、高品位な液晶表示が得られた。When this reflective cover was actually used as a backlight for a liquid crystal panel, it was able to prevent heating, irradiate uniform light, and obtain a high-quality liquid crystal display.
また、短絡も無く、安全性に優れたものであった。Further, there was no short circuit, and the safety was excellent.
「発明の効果コ
以上説明したように本発明によれば、可撓性樹脂材料中
に熱伝導性フィラーを存在させているので、蛍光管が発
熱しても有効に熱を除去し、液晶表示素子に熱の影響を
与えることを防止できる。``Effects of the Invention'' As explained above, according to the present invention, since a thermally conductive filler is present in the flexible resin material, even if the fluorescent tube generates heat, the heat is effectively removed and the liquid crystal display It is possible to prevent the element from being affected by heat.
また蛍光管の外側を、光反射性を有する可撓性樹脂材料
を用いて蛍光管反射カバーとすることにより、蛍光管の
光進路用開口部以外の実質的な部分が密着状態で覆われ
ているので、光の反射効率と集光性に優れ、とくに液晶
パネル用バックライトの蛍光管の反射カバーとして適し
たものである。In addition, by forming a fluorescent tube reflective cover on the outside of the fluorescent tube using a flexible resin material that has light reflectivity, the substantial portion of the fluorescent tube other than the light path opening is tightly covered. Therefore, it has excellent light reflection efficiency and light condensing ability, and is particularly suitable as a reflective cover for fluorescent tubes in backlights for liquid crystal panels.
また、精密加工性に優れ、光進路用開口部を直線に設け
ることができる。さらに量産性に優れ安価に製造するこ
とができる。そのうえエラスチック特性を失うことなく
、液晶パネルの組み立て加工性を向上させることができ
る。Further, it has excellent precision machinability, and the opening for the optical path can be provided in a straight line. Furthermore, it has excellent mass productivity and can be manufactured at low cost. Moreover, the ease of assembling the liquid crystal panel can be improved without losing its elastic properties.
また、熱伝導性フィラーを存在させた可撓性樹脂材料組
成物の熱伝導率を、ｌ０ＸＩＯ’〜７０ＸＩＯ’ （ｃ
ａ １／ｃｍ・秒・℃）の範囲にするという本発明の好
ましい構成によれば、より有効な熱の除去を行うことが
できる。In addition, the thermal conductivity of the flexible resin material composition in which a thermally conductive filler is present is calculated from 10XIO' to 70XIO' (c
According to the preferred configuration of the present invention in which the temperature is within the range of a 1/cm·sec·°C), more effective heat removal can be performed.
また、可撓性樹脂材料がシリコーンゴムであり、熱伝導
性フィラーが金属酸化物、金属窒化物、および金属硼素
化物から選ばれる少なくとも一種以上の化合物であると
いう本発明の好ましい構成によれば、電気絶縁性を有し
、かつより有効な熱の除去を行うことができる。Further, according to a preferred configuration of the present invention, the flexible resin material is silicone rubber, and the thermally conductive filler is at least one compound selected from metal oxides, metal nitrides, and metal borides. It has electrical insulation properties and can remove heat more effectively.
また、熱伝導性フィラーが平均粒子径の異なる２種類以
上の無機化合物であるという本発明の好ましい構成によ
れば、熱伝導性フィラーの充填量を多くでき、より有効
な熱の除去を行うことができる。Further, according to the preferred configuration of the present invention in which the thermally conductive filler is two or more types of inorganic compounds having different average particle diameters, the amount of the thermally conductive filler filled can be increased, and heat can be removed more effectively. I can do it.
さらに、蛍光管反射カバーの光進路用開口部以外の部分
に熱放散手段を備えているという本発明の好ましい構成
によれば、積極的な冷却を行うことができる。Furthermore, according to a preferred configuration of the present invention in which a portion of the fluorescent tube reflective cover other than the light path opening is provided with heat dissipation means, active cooling can be performed.
第１図は本発明の一実施例の断面図、第２図は本発明の
他の実施例の断面図、第３図は本発明の他の実施例の断
面図である。
１・・・蛍光管反射カバー ２・・・蛍光管、３・・・
光進路用開口部、４・・・液晶表示パネル面、５・・・
放熱フィン、６・・・放熱プレート。FIG. 1 is a sectional view of one embodiment of the invention, FIG. 2 is a sectional view of another embodiment of the invention, and FIG. 3 is a sectional view of another embodiment of the invention. 1... Fluorescent tube reflective cover 2... Fluorescent tube, 3...
Light path opening, 4...Liquid crystal display panel surface, 5...
Heat dissipation fin, 6... heat dissipation plate.
Claims (5)
部に蛍光管を収めるための中空部を備えているとともに
、中空部の一部が光進路用開口部を備え、蛍光管に接す
る面が平滑である蛍光管反射カバーであって、前記可撓
性樹脂材料中に熱伝導性フィラーを存在させたことを特
徴とする蛍光管反射カバー。(1) It is made of a flexible resin material with light reflectivity, and has a hollow part for housing the fluorescent tube inside, and a part of the hollow part has an opening for the light path, so that the fluorescent tube can 1. A fluorescent tube reflective cover having a smooth contacting surface, characterized in that a thermally conductive filler is present in the flexible resin material.
成物の熱伝導率が、１０×１０＾−＾４〜７０×１０＾
−＾４（ｃａｌ／ｃｍ・秒・℃）の範囲である請求項１
記載の蛍光管反射カバー。(2) The thermal conductivity of the flexible resin material composition in which the thermally conductive filler is present is 10 x 10^-^4 to 70 x 10^
-^4 (cal/cm・sec・℃) Claim 1
Fluorescent tube reflective cover as described.
性フィラーが金属酸化物、金属窒化物、および金属硼素
化物から選ばれる少なくとも一種以上の無機化合物であ
る請求項１記載の蛍光管反射カバー。(3) The fluorescent tube reflection according to claim 1, wherein the flexible resin material is silicone rubber, and the thermally conductive filler is at least one inorganic compound selected from metal oxides, metal nitrides, and metal borides. cover.
以上の無機化合物である請求項３記載の蛍光管反射カバ
ー。(4) The fluorescent lamp reflective cover according to claim 3, wherein the thermally conductive filler is two or more types of inorganic compounds having different average particle diameters.
熱放散手段を備えてなる請求項１記載の蛍光管反射カバ
ー。(5) The fluorescent tube reflective cover according to claim 1, further comprising a heat dissipation means in a portion of the fluorescent tube reflective cover other than the light path opening.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26284990A JPH0675393B2 (en) | 1990-09-28 | 1990-09-28 | Fluorescent tube reflective cover |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26284990A JPH0675393B2 (en) | 1990-09-28 | 1990-09-28 | Fluorescent tube reflective cover |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04138651A true JPH04138651A (en) | 1992-05-13 |
| JPH0675393B2 JPH0675393B2 (en) | 1994-09-21 |
Family
ID=17381477
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP26284990A Expired - Fee Related JPH0675393B2 (en) | 1990-09-28 | 1990-09-28 | Fluorescent tube reflective cover |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0675393B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003083896A1 (en) * | 2002-03-28 | 2003-10-09 | Matsushita Electric Industrial Co., Ltd. | Compact self-ballasted fluorescent lamp, fluorescent lamp and helical glass tube |
| JP2008514982A (en) * | 2005-08-31 | 2008-05-08 | エルジー・ケム・リミテッド | Reflector for backlight unit of liquid crystal display device and backlight unit having good thermal conductivity |
| US20160169472A1 (en) * | 2013-07-30 | 2016-06-16 | Koninklijke Philips N.V. | Thermal function of headlight sealing cap |
-
1990
- 1990-09-28 JP JP26284990A patent/JPH0675393B2/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003083896A1 (en) * | 2002-03-28 | 2003-10-09 | Matsushita Electric Industrial Co., Ltd. | Compact self-ballasted fluorescent lamp, fluorescent lamp and helical glass tube |
| US7132799B2 (en) | 2002-03-28 | 2006-11-07 | Matsushita Electric Industrial Co., Ltd. | Compact self-ballasted fluorescent lamp, fluorescent lamp and helical glass tube |
| JP2008514982A (en) * | 2005-08-31 | 2008-05-08 | エルジー・ケム・リミテッド | Reflector for backlight unit of liquid crystal display device and backlight unit having good thermal conductivity |
| US9146338B2 (en) | 2005-08-31 | 2015-09-29 | Lg Chem, Ltd. | Reflection plate for backlight unit and backlight unit of liquid crystal display having good thermal conductivity |
| US9442226B2 (en) | 2005-08-31 | 2016-09-13 | Lg Chem, Ltd. | Reflection plate for backlight unit and backlight unit of liquid crystal display having good thermal conductivity |
| US20160169472A1 (en) * | 2013-07-30 | 2016-06-16 | Koninklijke Philips N.V. | Thermal function of headlight sealing cap |
| US10208915B2 (en) * | 2013-07-30 | 2019-02-19 | Lumileds Llc | Thermal function of headlight sealing cap |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0675393B2 (en) | 1994-09-21 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |