JPH04199026A - Back light system - Google Patents
Back light systemInfo
- Publication number
- JPH04199026A JPH04199026A JP2331700A JP33170090A JPH04199026A JP H04199026 A JPH04199026 A JP H04199026A JP 2331700 A JP2331700 A JP 2331700A JP 33170090 A JP33170090 A JP 33170090A JP H04199026 A JPH04199026 A JP H04199026A
- Authority
- JP
- Japan
- Prior art keywords
- fluorescent tube
- plate
- metal body
- metallic body
- reflecting plate
- 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
- 238000009792 diffusion process Methods 0.000 claims abstract description 5
- 229910052751 metal Inorganic materials 0.000 claims description 19
- 239000002184 metal Substances 0.000 claims description 19
- 238000005476 soldering Methods 0.000 abstract description 2
- 230000005540 biological transmission Effects 0.000 abstract 1
- 239000000758 substrate Substances 0.000 description 8
- 229910052782 aluminium Inorganic materials 0.000 description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 5
- 239000004973 liquid crystal related substance Substances 0.000 description 5
- 238000005452 bending Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000004519 grease Substances 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000007740 vapor deposition Methods 0.000 description 1
Landscapes
- Liquid Crystal (AREA)
- Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
- Discharge Lamps And Accessories Thereof (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は、液晶パネル用バックライトシステムに関する
。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a backlight system for a liquid crystal panel.
［従来の技術１
従来のバックライトシステムを図面を参照しながら説明
する。第２図は、従来のバックライトシステムを示す斜
視図である。第２図において、１０１は蛍光管で管の両
端に端子電極１０２を設けている。１０３は光源用電極
で蛍光管保持基板１０４上に固定されており、蛍光管１
０１を固定すると共に電気的な接続もとっている。又、
蛍光管１０１には、始動電極１１０が貼り付けられてい
る。１０５は反射板で、プラスチックの成形品の表面に
アルミ蒸着処理が施しである０反射板１０５は、蛍光管
保持基板１０４上に固定されている。１０６は、拡散板
で、蛍光管１０１よりの出射光及び反射板１０５よりの
反射光を面光源として均一化する役割を果している。１
０７は、蛍光管駆動コードで、駆動回路との電気接続を
行っている。[Prior Art 1] A conventional backlight system will be explained with reference to the drawings. FIG. 2 is a perspective view of a conventional backlight system. In FIG. 2, 101 is a fluorescent tube, and terminal electrodes 102 are provided at both ends of the tube. 103 is a light source electrode fixed on the fluorescent tube holding substrate 104, and the fluorescent tube 1
01 is fixed and electrical connections are also made. or,
A starting electrode 110 is attached to the fluorescent tube 101 . Reference numeral 105 denotes a reflector, and the reflector 105 is a plastic molded product whose surface is subjected to aluminum vapor deposition treatment, and is fixed on the fluorescent tube holding substrate 104. Reference numeral 106 denotes a diffuser plate, which plays the role of uniformizing the light emitted from the fluorescent tube 101 and the light reflected from the reflection plate 105 as a surface light source. 1
07 is a fluorescent tube drive cord, which is electrically connected to the drive circuit.
［発明が解決しようとする課題］
しかしながら、従来のバックライトシステムについては
、下記の問題点があった。[Problems to be Solved by the Invention] However, conventional backlight systems have the following problems.
１ 蛍光管１０１に始動電極１１０が貼り付けられてい
るために、蛍光管１０１を設置する際に始動電極１１０
が拡散板１０６の反対方向にくる様、注意しなければな
らない。又、始動電極１１０を曲面に貼り付けたため貼
りつけづらい等工数アップにつながっている。1 Since the starting electrode 110 is attached to the fluorescent tube 101, the starting electrode 110 is attached when installing the fluorescent tube 101.
Care must be taken to ensure that the light is in the opposite direction to the diffuser plate 106. Furthermore, since the starting electrode 110 is attached to a curved surface, it is difficult to attach it, which increases the number of man-hours.
２ 反射板１０５がプラスチックにて成形されているた
め、蛍光管１０１より発した熱が反射板１０５から蛍光
管保持基板１０４側へ、逃げず、液晶パネル側へ伝わっ
てしまい、パネルの温度上昇が起っている。そこで、本
発明はこのような問題点を解決するもので、その目的と
するところは、パネルの温度上昇を低減し、蛍光管の始
動性を確保した上で、組立工数及びコストを低減したバ
ックライトシステムを提供するところにある。2. Since the reflective plate 105 is made of plastic, the heat generated from the fluorescent tubes 101 does not escape from the reflective plate 105 to the fluorescent tube holding substrate 104 side, but is transmitted to the liquid crystal panel side, resulting in an increase in the temperature of the panel. It's happening. Therefore, the present invention is intended to solve these problems.The purpose of the present invention is to reduce the temperature rise of the panel, ensure the startability of fluorescent tubes, and reduce assembly man-hours and costs. It provides a light system.
〔課題を解決するための手段１
上記課題を解決するため、少くとも、蛍光管、反射板及
び拡散板より構成されるバックライトシステムにおいて
、蛍光管の拡散板を配置する側の反射側に熱伝導の良い
金属体を蛍光管に近接配置し、前記金属体を回路系グラ
ンド電位に接続したことを特徴とする６
また、前記金属体により反射板を兼ねたことを特徴とす
る。[Means for solving the problem 1 In order to solve the above problem, at least in a backlight system consisting of a fluorescent tube, a reflector, and a diffuser, heat is applied to the reflective side of the fluorescent tube on the side where the diffuser is arranged. A highly conductive metal body is placed close to the fluorescent tube, and the metal body is connected to a circuit system ground potential. 6. The metal body also serves as a reflection plate.
また、前記金属体を外気に露出するケース体に熱伝導可
能な様に接続したことを特徴とする。Further, the metal body is connected to the case body exposed to the outside air so as to be able to conduct heat.
［実 施 例］ 第１図に、本発明の一実施例の斜視図を示す。[Example] FIG. 1 shows a perspective view of an embodiment of the present invention.
１は蛍光管で、端子電極２は、蛍光管保持基板４にハン
ダ付けされている。５は反射板でプラスチックにて成形
され、蛍光管保持基板４及び蛍光管ｌを保持する構造を
有している。６は拡散板で、蛍光管１よりの出射光及び
反射板５よりの反射光を面光源として均一化する役割を
果している。８は熱伝導の良い金属体で、反射板５に蛍
光管ｌに沿って空けられた穴により、蛍光管ｌに近接配
置できる構造となっている。又、熱伝導性の良い金属体
８は白色塗装をされた上、反射板５及び蛍光管保持基板
４に固定され、蛍光管保持基板４上において回路系ブラ
ンド電位にハンダ付けにて接続されている。本実施例に
よれば、熱伝導性の良い金属体８は蛍光管１に近接配置
され、かつ、蛍光管駆動回路のグランド電位に接続され
ているため、蛍光管１の始動電極の役割を果たし、蛍光
管１に始動電極を貼り付けなくとも、低温時の蛍光管１
の始動性は良好である。また、本実施例によれば、蛍光
管１より発生した熱は、熱伝導の良い金属体８により、
熱伝導により移動する役割が増え、空気を介して拡散板
６に移動する役割が減り、結果として、蛍光管ｌより発
生した熱がパネルの温度上昇に影響する程度が減少する
。又、蛍光管１、蛍光管保持基板４、熱伝導の良い金属
体８は、反射板５の凹凸を用いて配置する構造としてい
るので、組込性も向上している。1 is a fluorescent tube, and a terminal electrode 2 is soldered to a fluorescent tube holding substrate 4. Reference numeral 5 denotes a reflector plate made of plastic and has a structure for holding the fluorescent tube holding substrate 4 and the fluorescent tubes l. Reference numeral 6 denotes a diffuser plate, which plays the role of uniformizing the light emitted from the fluorescent tube 1 and the light reflected from the reflection plate 5 as a surface light source. Reference numeral 8 denotes a metal body with good thermal conductivity, and has a structure that allows it to be placed close to the fluorescent tube l due to holes made in the reflecting plate 5 along the fluorescent tube l. In addition, the metal body 8 with good thermal conductivity is painted white, fixed to the reflector 5 and the fluorescent tube holding board 4, and connected to the circuit system brand potential on the fluorescent lamp holding board 4 by soldering. There is. According to this embodiment, the metal body 8 with good thermal conductivity is placed close to the fluorescent tube 1 and is connected to the ground potential of the fluorescent tube drive circuit, so that it plays the role of a starting electrode for the fluorescent tube 1. , even without attaching a starting electrode to the fluorescent tube 1, the fluorescent tube 1 at low temperature
The starting performance is good. Further, according to this embodiment, the heat generated from the fluorescent tube 1 is transferred by the metal body 8 with good thermal conductivity.
The role of heat transfer by heat conduction increases and the role of heat transfer to the diffuser plate 6 through the air decreases, and as a result, the extent to which the heat generated from the fluorescent tubes 1 affects the temperature rise of the panel is reduced. Further, since the fluorescent tube 1, the fluorescent tube holding substrate 4, and the metal body 8 with good thermal conductivity are arranged using the unevenness of the reflection plate 5, ease of installation is improved.
第３図に、本発明の他の実施例の斜視図を示す。１１は
蛍光管で管の両端に端子電極１２を設けている。１３は
光源用電極で蛍光管保持基板４２に固定されており、蛍
光管１１を固定すると共に電気的な接続もとっている。FIG. 3 shows a perspective view of another embodiment of the invention. 11 is a fluorescent tube, and terminal electrodes 12 are provided at both ends of the tube. Reference numeral 13 denotes a light source electrode which is fixed to the fluorescent tube holding substrate 42, and not only fixes the fluorescent tube 11 but also provides electrical connection.
１５は、反射板で鏡面仕上げ処理のアルミニウム板を曲
げ加工したものである。アルミニウム板は承知のとおり
熱伝導の良い金属体である。反射板１５は、蛍光管保持
基板１４上に固定された上で、固定ネジ１７により、回
路系グランド電位に接続されている。第３図の実施例に
よれば、反射板１５が蛍光管１１の始動電極と、放熱板
を兼ねることが可能となり、省スペース化、省コスト化
が実現できる。15 is a reflective plate made by bending a mirror-finished aluminum plate. As you know, an aluminum plate is a metal body with good thermal conductivity. The reflector plate 15 is fixed on the fluorescent tube holding substrate 14 and connected to the circuit system ground potential by a fixing screw 17. According to the embodiment shown in FIG. 3, the reflector plate 15 can serve both as a starting electrode for the fluorescent tube 11 and as a heat sink, making it possible to save space and reduce costs.
第４図に、本発明の他の実施例の断面図を示す。FIG. 4 shows a sectional view of another embodiment of the invention.
２１は蛍光管、２２は液晶パネル、２６は拡散板を表す
、２５は、反射板で鏡面仕上げ処理のアルミニウム板を
曲げ加工したものである。反射板２５は、固定用ネジ２
３で、回路系グランド電位に接続されている。２７は表
ケースで、プラスチックにて成形加工されている。２８
は裏ケースで、アルミニウム板を曲げ加工している。こ
こで、反射板２５と裏ケース２８は、熱伝導良好な様に
、放熱用グリース２４を介在して接続している。第４図
の実施例によれば反射板２５を裏ケース２８は熱的に結
合し、かつ熱伝導性が良いので熱容量として大きなもの
としてとらえることができる。したがって、蛍光管２１
より発する熱は、反射板２５、裏ケース２８を熱伝導し
、表面積の大きな裏ケース２８より放熱し、拡散板２６
を通して、液晶パネル２２の温度上昇させる役割は極端
に少なくなる。つまり、液晶パネル２２は、蛍光管２１
による熱的影響を受けることが少なくなり、コントラス
トの低下等、画質の劣化を防ぐことができる。Reference numeral 21 represents a fluorescent tube, 22 represents a liquid crystal panel, 26 represents a diffuser plate, and 25 represents a reflector plate made by bending a mirror-finished aluminum plate. The reflection plate 25 is fixed with the fixing screw 2
3 and is connected to the circuit system ground potential. 27 is the front case, which is molded from plastic. 28
The back case is made from a bent aluminum plate. Here, the reflection plate 25 and the back case 28 are connected to each other with heat dissipation grease 24 interposed therebetween to ensure good heat conduction. According to the embodiment shown in FIG. 4, the reflective plate 25 is thermally coupled to the back case 28 and has good thermal conductivity, so it can be regarded as having a large heat capacity. Therefore, the fluorescent tube 21
The heat generated by the
Through this, the role of increasing the temperature of the liquid crystal panel 22 is extremely reduced. In other words, the liquid crystal panel 22
This reduces the thermal influence caused by the image, and prevents deterioration of image quality such as a decrease in contrast.
Ｃ発明の効果コ
以上説明した様に、本発明のバックライトシステムは、
蛍光管の拡散板を配置する側の反対側に熱伝導の良い金
属体を蛍光管に近接配置し、前記金属体を回路系のグラ
ンド電位に接続するという構成にしたので、蛍光管より
発生した熱がパネルに伝導することを低減でき、バック
ライトの組立性と向上させることができる６又、熱伝導
の良い金属体により、反射板を兼ねるという構成とする
と、省スペース化、省コスト化が可能となる。C Effects of the Invention C As explained above, the backlight system of the present invention has the following effects:
A metal body with good thermal conductivity is placed close to the fluorescent tube on the opposite side of the fluorescent tube from where the diffuser plate is placed, and the metal body is connected to the ground potential of the circuit system. It can reduce the conduction of heat to the panel and improve the ease of assembling the backlight.If the metal body has good heat conduction and doubles as a reflector, it saves space and costs. It becomes possible.
又、熱伝導の良い金属体を外気に露出するケース体に熱
伝導可能な様に接続した構成とすると、蛍光管から発生
した熱の放熱がより一層促進される。Furthermore, if a metal body with good thermal conductivity is connected to the case body exposed to the outside air in a heat conductive manner, the radiation of heat generated from the fluorescent tube is further promoted.
第１図は、本発明の一実施例の斜視図。
第２図は、従来のバックライトシステムを示す斜視図。
第３図は、本発明の他の実施例の斜視図。
第４図は、本発明の他の実施例の断面図。
１．１１．２１．１０１
・・・・・・蛍光管
２．１２．１０２
・・・・・・端子電極
１３．１０３・・・光源用電極
４・ １４・ １０４・蛍光管保持基板５、 ｌ ５、
２５、１０５
・・・・・・・反射板
６、１６、２６、１０６
・・・ ・・・拡散板
１０７・・ ・・・蛍光管駆動コード
８・ ・・・ ・・熱伝導の良い金属体１１０・・・・
・・始動電極
２２・・・・・・・液晶パネル
１７．２３・・・・固定用ネジ
２４・・・・・・・放熱用グリース
２７・・・・・・・表ケース
２８・・・・・・・裏ケース
以上
出願人 セイコーエプソン株式会社
代理人 弁理士 鈴 木 喜三部（他１名）第１図
第２図FIG. 1 is a perspective view of one embodiment of the present invention. FIG. 2 is a perspective view showing a conventional backlight system. FIG. 3 is a perspective view of another embodiment of the invention. FIG. 4 is a sectional view of another embodiment of the invention. 1.11.21.101... Fluorescent tube 2.12.102... Terminal electrode 13.103... Light source electrode 4, 14, 104, Fluorescent tube holding board 5, l 5,
25, 105 ...Reflector plate 6, 16, 26, 106 ... Diffusion plate 107 ... Fluorescent tube drive cord 8 ... ... Metal body with good heat conduction 110...
・・Starting electrode 22・・・・LCD panel 17.23・・・Fixing screw 24・・・・・ Heat dissipation grease 27・・・・Front case 28・・・・...Back case and above Applicant Seiko Epson Co., Ltd. agent Patent attorney Kizobe Suzuki (and 1 other person) Figure 1 Figure 2
Claims (3)
されるバックライトシステムにおいて、蛍光管の拡散板
を配置する側の反射側に熱伝導の良い金属体を蛍光管に
近接配置し、前記金属体を回路系のグランド電位に接続
したことを特徴としたバックライトシステム。(1) In a backlight system consisting of at least a fluorescent tube, a reflection plate, and a diffusion plate, a metal body with good thermal conductivity is placed close to the fluorescent tube on the reflection side of the fluorescent tube on the side where the diffusion plate is arranged, and A backlight system characterized by connecting a metal body to the ground potential of the circuit system.
する請求項（１）記載のバックライトシステム。(2) The backlight system according to claim (1), wherein the metal body also serves as a reflecting plate.
能な様に接続したことを特徴とする請求項（１）記載の
バックライトシステム。(3) The backlight system according to claim (1), wherein the metal body is connected to a case body exposed to the outside air in a heat conductive manner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP33170090A JP3150337B2 (en) | 1990-11-29 | 1990-11-29 | Light source device and liquid crystal device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP33170090A JP3150337B2 (en) | 1990-11-29 | 1990-11-29 | Light source device and liquid crystal device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04199026A true JPH04199026A (en) | 1992-07-20 |
| JP3150337B2 JP3150337B2 (en) | 2001-03-26 |
Family
ID=18246612
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP33170090A Expired - Fee Related JP3150337B2 (en) | 1990-11-29 | 1990-11-29 | Light source device and liquid crystal device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3150337B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06301034A (en) * | 1992-04-30 | 1994-10-28 | Riyoosan:Kk | Back light device and assembling method therefor |
| CN100376972C (en) * | 2005-04-29 | 2008-03-26 | 友达光电股份有限公司 | Directed-down light-negative moulding set |
| WO2008102609A1 (en) * | 2007-02-20 | 2008-08-28 | Panasonic Corporation | Backlight with hot cathode fluorescent lamp |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100405170C (en) * | 2003-04-01 | 2008-07-23 | 鸿富锦精密工业（深圳）有限公司 | Direct down type poor light module and its diffusion plate |
-
1990
- 1990-11-29 JP JP33170090A patent/JP3150337B2/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06301034A (en) * | 1992-04-30 | 1994-10-28 | Riyoosan:Kk | Back light device and assembling method therefor |
| CN100376972C (en) * | 2005-04-29 | 2008-03-26 | 友达光电股份有限公司 | Directed-down light-negative moulding set |
| WO2008102609A1 (en) * | 2007-02-20 | 2008-08-28 | Panasonic Corporation | Backlight with hot cathode fluorescent lamp |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3150337B2 (en) | 2001-03-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5774199A (en) | Liquid crystal display device | |
| US7237923B2 (en) | Backlight unit having a cooling member | |
| JP3354327B2 (en) | Liquid crystal display | |
| JPH04199026A (en) | Back light system | |
| JPH08129174A (en) | Illuminator for liquid crystal display device | |
| JP2003084280A (en) | Liquid crystal display device | |
| JP3285710B2 (en) | Lighting device and liquid crystal display device | |
| JPH0882798A (en) | Display device with back light | |
| JP2003215547A (en) | Liquid crystal display | |
| JPH1152373A (en) | Liquid crystal display device | |
| JPH1078578A (en) | Back light device | |
| JP3792456B2 (en) | Backlight | |
| WO2001066995A1 (en) | Backlight and lcd device having backlight | |
| JPH08146396A (en) | Liquid crystal display device | |
| JPH11283427A (en) | Back light device | |
| JP3666897B2 (en) | Backlight device and liquid crystal display device including the backlight device | |
| JPH06202103A (en) | Back light unit for liquid crystal | |
| JPH02157789A (en) | Back-light device | |
| JP3149838B2 (en) | Light source device | |
| JP2000241814A (en) | Liquid crystal display device and its back light | |
| JP2007004025A (en) | Projector | |
| JP2001092368A (en) | Back light device and liquid crystal display device | |
| JPS62245237A (en) | Reflecting mirror for flash discharge light emitting device | |
| JPH03229290A (en) | Liquid crystal display device | |
| JPH0747005Y2 (en) | Lighting equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090119 Year of fee payment: 8 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20100119 Year of fee payment: 9 |
|
| LAPS | Cancellation because of no payment of annual fees |