JPH0230053A - Irradiating device - Google Patents
Irradiating deviceInfo
- Publication number
- JPH0230053A JPH0230053A JP17974288A JP17974288A JPH0230053A JP H0230053 A JPH0230053 A JP H0230053A JP 17974288 A JP17974288 A JP 17974288A JP 17974288 A JP17974288 A JP 17974288A JP H0230053 A JPH0230053 A JP H0230053A
- Authority
- JP
- Japan
- Prior art keywords
- light
- discharge tube
- tube
- irradiation device
- fluorescent discharge
- 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
- 230000001678 irradiating effect Effects 0.000 title 1
- 238000010438 heat treatment Methods 0.000 claims abstract description 21
- 239000004809 Teflon Substances 0.000 abstract description 2
- 229920006362 Teflon® Polymers 0.000 abstract description 2
- 239000004020 conductor Substances 0.000 abstract description 2
- 239000000463 material Substances 0.000 abstract description 2
- 239000000049 pigment Substances 0.000 abstract description 2
- 239000000203 mixture Substances 0.000 abstract 1
- 239000004973 liquid crystal related substance Substances 0.000 description 4
- 230000007423 decrease Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000009413 insulation Methods 0.000 description 2
- 230000002745 absorbent Effects 0.000 description 1
- 239000002250 absorbent Substances 0.000 description 1
- 239000011358 absorbing material Substances 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000006258 conductive agent Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 239000002932 luster Substances 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Landscapes
- Discharge Lamps And Accessories Thereof (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は、例えば低温時にも液晶表示素子を背面照明
できる照射装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an irradiation device that can backlight a liquid crystal display element even at low temperatures, for example.
第６図及び第７図は、従来の照射装置で蛍光放電管など
の発光体を加熱するリボン状ヒータの一例の部分破断圧
面及び１１ＩＩ面をそれ７頻す図である。図において、
回は正の抵抗温度係数をもつ自己温度別画型の平形状発
熱体で、例えば樹脂材料にある種の導電性剤を混合する
ことによシ得られる。Ｑり及び１３は発熱体ｌ中にその
長手方向に沿って平行に埋め込まれた導線、 ０４及び
ａ〜は４線（１２１、Ｈに通電するだめの外部リードー
プであり、これらより、自己温度制御型リボン状ヒータ
（１０）が構成される。FIGS. 6 and 7 are views showing a partially fractured pressure surface and a 11II surface of an example of a ribbon-shaped heater for heating a light-emitting object such as a fluorescent discharge tube in a conventional irradiation device. In the figure,
The heating element is a self-temperature flat heating element with a positive temperature coefficient of resistance, which can be obtained, for example, by mixing a certain type of conductive agent with a resin material. Q and 13 are conductive wires embedded in parallel along the longitudinal direction of the heating element l, 04 and a~ are external lead dopes for energizing the 4 wires (121 and H), and from these, self-temperature control is possible. A type ribbon heater (10) is constructed.
第８図及び第９図は、上記リボン状ヒータを使用した従
来の照射装置の一例の斜視図及び側面図である。図にお
いて、−は蛍光放電管であり、これを加熱するリボン状
ヒータ（ｌＯ）が近接して設けられている。FIGS. 8 and 9 are a perspective view and a side view of an example of a conventional irradiation device using the above ribbon-shaped heater. In the figure, - is a fluorescent discharge tube, and a ribbon-shaped heater (1O) for heating it is provided nearby.
次に、動作について説明する。一般に、液晶表示素子（
以後、ＬＣＤと略す）は非発光性であるため、外光条件
によっては素子後方からの照射が必要となる。このため
、ＬＣＤの省エネルギー性、薄形性を損わない高効率高
輝度の薄形背面照明（以後、バックライトと略す）の開
発が待たれていた。この種のバックライトの例として、
ｆテレビジョン学会技術報告；工ＰＤ１０１！−２、昭
和６１年８月２５日発行」に報告されているように、光
源に蛍光放電管を使用したものがある。この蛍光放電管
では、低温時には、封入されている水銀蒸気圧が低下す
るため、放電管の輝度が低下したり、あるいけ放電管の
点灯が殆んど行なわれなかったりするという多感がしば
しば生じていた。例えば１周囲温度が一１０℃以下にな
った場合には、放電管は正常に点灯しなくなる。Next, the operation will be explained. Generally, liquid crystal display elements (
Since LCDs (hereinafter abbreviated as LCDs) are non-luminescent, irradiation from the rear of the device is required depending on the external light conditions. For this reason, the development of a thin backlight (hereinafter abbreviated as backlight) with high efficiency and high brightness that does not impair the energy saving and thinness of LCDs has been awaited. An example of this type of backlight is
f Television Society Technical Report; Engineering PD101! 2, published August 25, 1986, there is one that uses a fluorescent discharge tube as a light source. In these fluorescent discharge tubes, at low temperatures, the mercury vapor pressure enclosed in the tube decreases, which often causes the luminance of the discharge tube to decrease or the discharge tube to hardly turn on at all. was occurring. For example, if the ambient temperature drops below 110 degrees Celsius, the discharge tube will not light up properly.
従って、放電管の正常な動作を行わせるためには、低温
時に放電管を加熱することが考えられ、上記自己温度制
御型リボン状ヒータが用いられる。このとき、外部電源
から外部リード＠ａ４゜ａＦＡを介して導線υ匈、０樽
間に所定の電圧を印加しておけば１周囲温度が低下した
場合には、発熱体１．１１Ｊの抵抗値が小さくなるため
発熱量が増大する。従って、蛍光放電管−は加熱されて
、正常に点灯する。Therefore, in order to allow the discharge tube to operate normally, it is considered to heat the discharge tube when the temperature is low, and the self-temperature control type ribbon heater described above is used. At this time, if a predetermined voltage is applied between the conductor wire υ匈 and 0 barrel from the external power supply via the external lead @a4゜aFA, if the ambient temperature drops by 1, the resistance of the heating element 1.11J As the amount of heat decreases, the amount of heat generated increases. Therefore, the fluorescent discharge tube is heated and lights up normally.
上記のような従来の照射装置では１発熱体を被っている
絶縁チューブが青色又は黒色の有色の光吸収性部材であ
るため、これに近接する蛍光放電管からの光が吸収され
１表示素子面に有色の縞影が表われたり、輝度が低下し
たりするという課題があった。In the conventional irradiation device as described above, the insulating tube covering the first heating element is a blue or black colored light-absorbing member, so light from the fluorescent discharge tube in the vicinity is absorbed and the one display element surface is absorbed. There were problems in that colored stripes appeared on the screen and the brightness decreased.
この発明は、かかる課題を解決するためになされたもの
で、表示素子面に有色の縞影が表われない高輝度な照射
装置を得ることを目的とする。The present invention was made to solve this problem, and an object of the present invention is to obtain a high-intensity irradiation device in which colored stripes do not appear on the surface of a display element.
この発明に係る照射装置は、加熱を要する発光体と、こ
の発光体を加熱する発熱体、及びこの発熱体の上記発光
体と対向する側に介在する光弁吸収性部材を備えたもの
である。The irradiation device according to the present invention includes a light emitting body that requires heating, a heating element that heats the light emitting body, and a light valve absorbing member interposed on the side of the heating body that faces the light emitting body. .
この発明においては、光弁吸収性部材が発光体からの光
を反射する。In this invention, the light valve absorbing member reflects light from the light emitter.
第１図及び第８図は、この発明の一実施例の照射装置に
用いられるリボン状ヒータの部分破断正面鷺及び側面を
それぞれ示す図であり、叩〜ａ〜は従来と同様のもので
ある。２１は顔料に白色のものを混合するなどして作ら
れる白色テフロンチューブなどの光弁吸収性の絶縁チュ
ーブであり、発熱体０１）及び導線１１２１ 、１１３
１を被っている。FIGS. 1 and 8 are partially broken front and side views of a ribbon-shaped heater used in an irradiation device according to an embodiment of the present invention, respectively; . 21 is a light valve-absorbing insulating tube such as a white Teflon tube made by mixing a white substance with a pigment;
Covers 1.
これらよシ、光非吸収性の自己温度別ａ型すボン状ヒー
タＷｌｌを構成している。These components constitute a non-light-absorbing self-temperature type A-type bubble heater Wll.
第８図及び第４図は、上記の尤非吸収性すボン状ヒータ
圓を使用した照射装置の一例の斜視図及び正面図をそれ
ぞれ示す。この構成及び近接の蛍光放電管ｔ３ｆ）ｔ−
加熱する動作は従来と同様であるが、リボン状ヒータ３
υを被う絶縁チューブ（至）が白色の光弁吸収性部材で
あるので蛍光放電管図からの光は散乱される。FIG. 8 and FIG. 4 show a perspective view and a front view, respectively, of an example of an irradiation device using the above-mentioned non-absorbing ribbon-shaped heater circle. This configuration and the nearby fluorescent discharge tube t3f)t-
The heating operation is the same as the conventional one, but the ribbon heater 3
Since the insulating tube covering υ is a white light valve absorbing material, the light from the fluorescent discharge tube is scattered.
第５図は、上記のようにして構成された照射装置を液晶
表示素子のバックライトに応用した一例を示す斜視図で
ある。図において…は蛍光放電管（至）でバックライト
される液晶表示素子、■は照射装置の周囲を囲む光反射
板である。FIG. 5 is a perspective view showing an example in which the irradiation device configured as described above is applied to a backlight of a liquid crystal display element. In the figure, ... is a liquid crystal display element that is backlit by a fluorescent discharge tube, and ■ is a light reflecting plate that surrounds the irradiation device.
このような照射装置においては、型光放電管−からの光
が吸収されなくなるので、表示素子面に有色の槁影が表
われない高輝度な照射装置にすることができる。In such an irradiation device, since the light from the photodischarge tube is no longer absorbed, it is possible to provide a high-intensity irradiation device in which no colored shadow appears on the display element surface.
上記実施列では、絶縁チューブ１２１１は白色にしたが
、絶縁チューブにアルミテープなどを巻いて金属光沢を
持たせてもよい。In the above embodiment, the insulating tube 1211 is white, but the insulating tube may be wrapped with aluminum tape or the like to give it a metallic luster.
この場合、絶縁チューブは光反射性になシ、尤が吸収さ
れるのを防ぐことができる。In this case, the insulating tube is not light reflective and can prevent light from being absorbed.
尚、絶縁チューブ？光非吸収性部材にするのは、少なく
とも蛍光放電管と対向する側のみとしても同様の効果を
奏する。Also, insulation tube? The same effect can be obtained even if the non-light-absorbing member is used at least only on the side facing the fluorescent discharge tube.
また、発熱体と蛍光放電管との間の部材は、絶縁チュー
ブに限られず・有脂などのコーテイング体など光弁吸収
性部材が介在されていればよいことは言うまでもない。Furthermore, it goes without saying that the member between the heating element and the fluorescent discharge tube is not limited to an insulating tube, but may include a light valve-absorbing member such as a coating made of fat or the like.
さらに、発光体は蛍光放電管に限られず、加熱を必要と
するものには適用でき、また形状も棒状以外の任意形状
でもよく、発熱体も自己温度別１１１１型の他温度セン
ナ付の加熱体などでもよい。Furthermore, the light emitting body is not limited to a fluorescent discharge tube, but can be applied to anything that requires heating, and the shape may be any shape other than a rod. etc.
この発明は１以上説明したとおり、加熱を要する発光体
と、この発光体を加熱する発熱体、及びこの発熱体の上
記発光体と対向する側に介在する光弁吸収性部材を備え
る構成にしたので発光体からの光が光弁吸収性部材で反
射され１表示素子面に有色の縞影が表われない高輝度な
照射装置が得られる効果がある。As explained above, the present invention is configured to include a light emitting body that requires heating, a heating element that heats the light emitting body, and a light valve absorbing member interposed on the side of the heating body opposite to the light emitting body. Therefore, the light from the light emitter is reflected by the light valve absorbing member, and a high-intensity irradiation device can be obtained in which colored stripes do not appear on the surface of one display element.
第１図及び第２図はこの発明の一実施例の照射装置に用
いられるリボン状ヒータの部分破断正面及び側面をそれ
ぞれ示す図、第８図及び第４図Ｖｉ第１図のリボン状ヒ
ータを用いた照射装置の一例の斜視及び正面をそれぞれ
示す図、第５図は第８図の照射装置を液晶表示素子のバ
ックライトに応用した一例を示す斜視図、第６図及び第
７図は従来の照射装置に用いられるリボン状ヒータの部
分破断正面及び側面をそれぞれ示す図、第８図及び第９
図は第６図のリボン状ヒータを用いた照射装置の一例の
斜視及び正面をそれぞれ示す図である。
図において、ａυは発熱体、（至）に光弁吸収性部材（
光弁吸収性絶縁チューブ）、２１１はリボン状ヒータ、
国は発光体（蛍光放電管）である。
なお、各図中同一符号は同一または相当部分を示す。FIGS. 1 and 2 are partially cutaway front and side views of a ribbon-shaped heater used in an irradiation device according to an embodiment of the present invention, respectively, and FIGS. 8 and 4 are views showing the ribbon-shaped heater of FIG. Figure 5 is a perspective view showing an example of the irradiation device used as an example of the irradiation device used, and FIG. 5 is a perspective view showing an example of the irradiation device of FIG. FIGS. 8 and 9 are views showing a partially broken front and side view of a ribbon-shaped heater used in an irradiation device, respectively.
The figures are a perspective view and a front view, respectively, of an example of the irradiation device using the ribbon-shaped heater of FIG. 6. In the figure, aυ is the heating element, (to) the light valve absorbing member (
light valve (absorbent insulation tube), 211 is a ribbon heater,
The country is a luminous body (fluorescent discharge tube). Note that the same reference numerals in each figure indicate the same or corresponding parts.
Claims (1)
びこの発熱体の前記発光体と対向する側に介在する光非
吸収性部材を備えたことを特徴とする照射装置。An irradiation device comprising a light emitting body that requires heating, a heating element that heats the light emitting body, and a non-light absorbing member interposed on a side of the heat generating body opposite to the light emitting body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17974288A JPH0230053A (en) | 1988-07-18 | 1988-07-18 | Irradiating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17974288A JPH0230053A (en) | 1988-07-18 | 1988-07-18 | Irradiating device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0230053A true JPH0230053A (en) | 1990-01-31 |
Family
ID=16071074
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17974288A Pending JPH0230053A (en) | 1988-07-18 | 1988-07-18 | Irradiating device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0230053A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1997040517A1 (en) * | 1996-04-19 | 1997-10-30 | Sharp Kabushiki Kaisha | Illuminator and display utilizing the same |
-
1988
- 1988-07-18 JP JP17974288A patent/JPH0230053A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1997040517A1 (en) * | 1996-04-19 | 1997-10-30 | Sharp Kabushiki Kaisha | Illuminator and display utilizing the same |
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