JPH03172820A - Panel heater and liquid crystal device with panel heater - Google Patents
Panel heater and liquid crystal device with panel heaterInfo
- Publication number
- JPH03172820A JPH03172820A JP31073389A JP31073389A JPH03172820A JP H03172820 A JPH03172820 A JP H03172820A JP 31073389 A JP31073389 A JP 31073389A JP 31073389 A JP31073389 A JP 31073389A JP H03172820 A JPH03172820 A JP H03172820A
- Authority
- JP
- Japan
- Prior art keywords
- panel heater
- liquid crystal
- transparent
- film
- conductive film
- 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
- 239000004973 liquid crystal related substance Substances 0.000 title claims abstract description 32
- 239000000758 substrate Substances 0.000 claims abstract description 22
- 239000004990 Smectic liquid crystal Substances 0.000 claims description 2
- 239000005262 ferroelectric liquid crystals (FLCs) Substances 0.000 claims description 2
- 239000011521 glass Substances 0.000 abstract description 10
- XOLBLPGZBRYERU-UHFFFAOYSA-N tin dioxide Chemical compound O=[Sn]=O XOLBLPGZBRYERU-UHFFFAOYSA-N 0.000 abstract description 8
- 238000005229 chemical vapour deposition Methods 0.000 abstract description 2
- 238000004544 sputter deposition Methods 0.000 abstract description 2
- 238000004040 coloring Methods 0.000 abstract 1
- 230000007613 environmental effect Effects 0.000 description 10
- 238000000605 extraction Methods 0.000 description 3
- 239000003566 sealing material Substances 0.000 description 2
- 239000004642 Polyimide Substances 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000002845 discoloration Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- AMGQUBHHOARCQH-UHFFFAOYSA-N indium;oxotin Chemical compound [In].[Sn]=O AMGQUBHHOARCQH-UHFFFAOYSA-N 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- 239000000565 sealant Substances 0.000 description 1
Landscapes
- Liquid Crystal (AREA)
- Surface Heating Bodies (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明はパネルヒーターおよびパネルヒーター付液晶表
示装置に関し、特に透明導電膜の膜厚を一部変えること
により、表面の温度分布を均一化した透明パネルヒータ
ーおよびこの透明パネルヒーターを備えた液晶表示装置
に関するものである。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a panel heater and a liquid crystal display device equipped with a panel heater, and in particular, the present invention relates to a panel heater and a liquid crystal display device equipped with a panel heater. The present invention relates to a transparent panel heater and a liquid crystal display device equipped with the transparent panel heater.
［従来の技術］
従来の透明パネルヒーター、特に液晶表示装置の加熱に
用いる透明パネルヒーターを第４図に示す。[Prior Art] FIG. 4 shows a conventional transparent panel heater, particularly a transparent panel heater used for heating a liquid crystal display device.
第４図（ａ）は、従来のパネルヒーターの平面図であり
、第４図（ｂ）はそのＡ−Ａ’断面図である。第４図中
、１は絶縁性透明基板、３は該基板上に設けられた透明
導電膜、４，４′は取出電極をそれぞれ示す。FIG. 4(a) is a plan view of a conventional panel heater, and FIG. 4(b) is a sectional view taken along line AA'. In FIG. 4, 1 is an insulating transparent substrate, 3 is a transparent conductive film provided on the substrate, and 4 and 4' are extraction electrodes, respectively.
このパネルヒーターは透過光又は反射光の干渉による色
づき（色むら）を小さくして視認性を向上させるために
透明導！＠３の膜厚をできるだけ均一にする構成をとっ
ている。This panel heater uses transparent conductors to reduce discoloration (color unevenness) caused by interference of transmitted or reflected light and improve visibility. The film thickness of @3 is made as uniform as possible.
［発明が解決しようとする課題］
しかし、上記従来のパネルヒーターは、透明導電膜の膜
厚が均一（すなわち、導！膜各部の比抵抗が均一）であ
りかつパネルヒーターの中心部と周辺部で放熱量が異な
るため、中心部の温度が高くなり、温度分布の均一化に
限界があるという問題がある。具体的には、第４図に示
すような透明導電膜３の膜厚が均一な従来のパネルヒー
ター（基板材質 ガラス、基板サイズ ３２０ｍｍ ｘ
３００ｍｍ、厚さ１．１ ｍｍ 、透明導電膜 Ｉ
ＴＯ膜、膜厚５００人）について温度分布を測定したと
ころ、環境温度１０℃、電圧６０ｖ、電流０．５Ａの定
常状態で４０℃±６．０℃、また環境温度２５℃、電圧
３０ｖ、電流０．３Ａの定常状態で４０℃±４．０℃の
温度分布を示した（第１表参照）。[Problems to be Solved by the Invention] However, in the above conventional panel heater, the thickness of the transparent conductive film is uniform (that is, the specific resistance of each part of the conductive film is uniform), and the thickness of the transparent conductive film is uniform in the center and peripheral parts of the panel heater. Since the amount of heat dissipated differs between the two, the temperature at the center becomes high, and there is a problem in that there is a limit to making the temperature distribution uniform. Specifically, a conventional panel heater (substrate material: glass, substrate size: 320 mm x
300mm, thickness 1.1mm, transparent conductive film I
When measuring the temperature distribution of TO film (film thickness: 500 people), it was 40°C ± 6.0°C in a steady state with an environmental temperature of 10°C, a voltage of 60 V, and a current of 0.5 A. It showed a temperature distribution of 40°C±4.0°C under a steady state of 0.3A (see Table 1).
また、温度分布を均一にするために、第５図（ａ）およ
び（ｂ）に示すようなパネルヒーターも提案されている
。Further, in order to make the temperature distribution uniform, a panel heater as shown in FIGS. 5(a) and 5(b) has also been proposed.
第５図（ａ）はパターニングされた透明電極を有するパ
ネルヒーターの平面図であり、第５図（ｂ）はそのＡ−
Ａ’断面図である。第５図中、１は絶縁性透明基板、３
は透明導電膜、４．４′は取出’ｉａｉをそれぞれ示す
。FIG. 5(a) is a plan view of a panel heater having patterned transparent electrodes, and FIG. 5(b) is a plan view of the panel heater having patterned transparent electrodes.
It is an A' sectional view. In Fig. 5, 1 is an insulating transparent substrate, 3
4.4' indicates a transparent conductive film, and 4.4' indicates an extraction 'iai.
これを液晶表示装置用パネルヒーターとして用いると、
透明電極のパターン形状が見えてしまうという問題があ
り、液晶表示装置として好ましくない。When this is used as a panel heater for a liquid crystal display device,
There is a problem that the pattern shape of the transparent electrode is visible, which is not preferable as a liquid crystal display device.
従って、温度分布の均一化と、良好な視認性を両立する
透明パネルヒーターおよびそのようなパネルヒーター付
液晶表示装置を得ることは困難であった。Therefore, it has been difficult to obtain a transparent panel heater that achieves both uniform temperature distribution and good visibility, and a liquid crystal display device equipped with such a panel heater.
本発明は、前記従来技術の課題を解決し、温度分布が均
一で、しかも視認性が良好なパネルヒーターを提供する
ことおよびこのパネルヒーターを備えた液晶表示装置を
提供することを目的とする。SUMMARY OF THE INVENTION An object of the present invention is to solve the problems of the prior art described above, to provide a panel heater with uniform temperature distribution and good visibility, and to provide a liquid crystal display device equipped with this panel heater.
［課題を解決するための手段〕
上記目的を達成するため、本発明のパネルヒーターは、
絶縁性透明基板上に透明導電膜を設けたパネルヒーター
であって、透明導電膜が膜厚の厚い領域と薄い領域とを
有することを特徴とする。[Means for Solving the Problems] In order to achieve the above object, the panel heater of the present invention has the following features:
A panel heater in which a transparent conductive film is provided on an insulating transparent substrate, and is characterized in that the transparent conductive film has a thick region and a thin region.
透明導電膜の膜厚の最大値（ｄ、、、）と最小値（ａｍ
ｅｎ）の関係は、
ｄ ｍｉｘ／ ｄ ＋ａｌｎ≧１．１ 。Maximum value (d, , ) and minimum value (am
The relationship of en) is d mix/ d + aln≧1.1.
ｄ ｍａ、、−ｄ ｓｉｎ ≦ １００人を満足する
ことが好ましい。It is preferable to satisfy d ma, , -d sin ≦ 100 people.
また、本発明の液晶表示装置は前記パネルヒーターを設
けたことを特徴とする。Moreover, the liquid crystal display device of the present invention is characterized in that the above-mentioned panel heater is provided.
液晶表示装置に用いる液晶はカイラルスメクチックＣ相
を有する強訴電性液晶であることが好ましい。The liquid crystal used in the liquid crystal display device is preferably a strongly electrostatic liquid crystal having a chiral smectic C phase.
〔作用］
本発明によれば、透明導電膜の膜厚について、ｄ□８／
ｄ１゜≧１．１、
ｄ ｖｍａｘ −ｄ ｓｉｎ ≦ １００人を満足す
る範囲で一部の膜厚を変化させることで温度分布の均一
化を計り、これによって、視認性が良く（色づき、色む
らがなく）、温度分布が均一な透明パネルヒーターを実
現した。[Function] According to the present invention, the thickness of the transparent conductive film is d□8/
d1゜≧1.1, d vmax - d sin ≦ By changing the thickness of a part of the film within a range that satisfies 100 people, we aim to make the temperature distribution uniform. ), we have realized a transparent panel heater with uniform temperature distribution.
［実施例］ 以下、図面を用いて本発明の詳細な説明する。[Example] Hereinafter, the present invention will be explained in detail using the drawings.
叉ｍ
第１図（ａ）は、本発明の一実施例に係るパネルヒータ
ーの平面図であり、第１図（ｂ）は、そのＡ−Ａ’断面
図である。第１図中、１はガラス基板、２は二酸化スズ
膜（ＳｎＯ，膜）、３はインジウム−スズ−オキサイド
膜（ＩＴＯＩｌｉ）、４．４′はヒーター取出電極をそ
れぞれ示す。Fig. 1(a) is a plan view of a panel heater according to an embodiment of the present invention, and Fig. 1(b) is a sectional view taken along line AA' thereof. In FIG. 1, 1 is a glass substrate, 2 is a tin dioxide film (SnO, film), 3 is an indium-tin-oxide film (ITOIli), and 4.4' is a heater lead-out electrode.
かかるパネルヒーターは以下のようにして作成した。Such a panel heater was created as follows.
ガラス基板１ （３２０ｍｍＸ ３００ｖｎ、厚さ１
．１ ｍｍ）上全面にＣＶＤ法で透明なＳｎＯ，膜２を
厚さ８００人だけ成膜する。次に、第１図に示すように
、透明なＩＴＯ膜３をスパッタ法にて厚さ８０人だけ成
膜し、これによって透明パネルヒーターを作成した。こ
のＳｎＯ２膜２およびＩＴＯ膜３から成る透明導電膜の
膜厚は最大値（ｄ 、、、）が８８０人、最小値（ｄ−
＋ｎ）が８００人であり、ｄｌ、ｌａｘ／ｄｍｌｎ≧１
．１、
ｄ ＩＩＩＩＩＸ −ｄ ｍｌｎ ≦ １００人を
満足していた。Glass substrate 1 (320mm x 300vn, thickness 1
．． A transparent SnO film 2 is formed to a thickness of 800 mm over the entire surface (1 mm) using the CVD method. Next, as shown in FIG. 1, a transparent ITO film 3 was formed by sputtering to a thickness of 80 mm, thereby creating a transparent panel heater. The thickness of the transparent conductive film composed of the SnO2 film 2 and the ITO film 3 has a maximum value (d,,,) of 880 people and a minimum value (d-
+n) is 800 people, and dl, lax/dmln≧1
．． 1, dIIIIX-dmln≦100 people were satisfied.
このパネルヒーターを通常の室内（３００Ｊｌｘ蛍光燈
下）で目視観察したところ、ＩＴＯ膜部分とＳｎＯ，膜
部分の境界を視認することは困難であった。When this panel heater was visually observed in a normal room (under a 300 Jlx fluorescent light), it was difficult to visually recognize the boundary between the ITO film portion and the SnO film portion.
また、この透明パネルヒーターの取出電極４゜４′に通
電したところヒーター面内の温度分布は、環境温度１０
℃、電圧６０ｖ、電流０．５Ａの定常状態で４０℃±２
．５℃、また環境温度２５℃、電圧３゜■、電流０．３
Ａの定常状態で４０℃± １．５℃であった（第１表参
照）。In addition, when electricity was applied to the lead electrodes 4°4' of this transparent panel heater, the temperature distribution within the heater surface was 10% higher than the environmental temperature.
℃, voltage 60V, current 0.5A steady state 40℃±2
．． 5℃, environmental temperature 25℃, voltage 3゜■, current 0.3
The steady state temperature of A was 40°C ± 1.5°C (see Table 1).
すなわち、環境温度ｌＯ℃、電圧６０ｖ、電流０．５Ａ
の定常状態で比較すると従来例の温度分布が４０℃±６
．０℃であるのに対し実施例の温度分布は４０℃± ２
．５℃であり、また環境温度２５℃、電圧３０Ｖ、電流
０．３Ａの定常状態で比較すると従来例の温度分布が４
０℃± ４．０℃であるのに対し実施例の温度分布は４
０℃±１．５℃であった（第１表参照）。この結果から
明らかなように、実施例１の温度分布の均一性は従来例
と比べ大きく改善された。That is, the environmental temperature is 10°C, the voltage is 60V, and the current is 0.5A.
When compared in the steady state, the temperature distribution of the conventional example is 40℃±6
．． The temperature distribution in the example is 40℃±2 while it is 0℃.
．． 5℃, and when compared in a steady state with an environmental temperature of 25℃, a voltage of 30V, and a current of 0.3A, the temperature distribution of the conventional example is 4.
The temperature distribution in the example was 0℃±4.0℃, whereas the temperature distribution in the example was 4.
The temperature was 0°C±1.5°C (see Table 1). As is clear from this result, the uniformity of temperature distribution in Example 1 was greatly improved compared to the conventional example.
このように本発明を用いることで、従来困難でありた良
好な視認性と均一な温度分布とを両立する透明パネルヒ
ーターが実現できた。As described above, by using the present invention, a transparent panel heater that achieves both good visibility and uniform temperature distribution, which have been difficult to achieve in the past, has been realized.
第２図は、第１図に示した透明パネルヒーターを適用し
た液晶表示装置の一例を示す断面図である。第２図中、
１．ｔ’ はガラス基板、２はＳｎＯ，膜、３はＩＴＯ
膜、５は液晶、６はシール材、７．７′は画素電極、８
．８′は配向膜をそれぞれ示す。FIG. 2 is a sectional view showing an example of a liquid crystal display device to which the transparent panel heater shown in FIG. 1 is applied. In Figure 2,
1. t' is glass substrate, 2 is SnO, film, 3 is ITO
film, 5 is liquid crystal, 6 is sealing material, 7.7' is pixel electrode, 8
．． 8' indicates an alignment film.
このような液晶表示装置は以下のようにして作成される
。Such a liquid crystal display device is produced as follows.
上記のようにして得られた透明パネルヒーターのガラス
基板１の表面であってＳｎＯ，膜２等が形成された面と
反対側のガラス基板表面に画素電極７を形成し、配向Ｍ
８としてポリイミドを印刷にて厚さ １５０人成膜し、
ラビングにて配向処理を行い、液晶表示装置の２枚の基
板の内の一方の基板とした。次に、これと同様にして、
別のガラス基板１′の表面に画素電極７′および配向膜
８′を形成し、前記と同様の配向処理を行って得られた
基板を液晶表示装置のもう一方の基板とした。A pixel electrode 7 is formed on the surface of the glass substrate 1 of the transparent panel heater obtained as described above, which is opposite to the surface on which SnO, film 2, etc. are formed, and
8, polyimide was printed to a thickness of 150 people,
An alignment treatment was performed by rubbing to form one of the two substrates of a liquid crystal display device. Then, similarly to this,
A pixel electrode 7' and an alignment film 8' were formed on the surface of another glass substrate 1', and the same alignment treatment as above was performed.The obtained substrate was used as the other substrate of the liquid crystal display device.
これらの基板をシール材６を介して第２図に示すような
位置関係となるように貼り合せた後、強誘電液晶５（商
品名： Ｃ５−１０１４、チッソ（株）社製）を封入し
て液晶表示装置を得た。After bonding these substrates together with a sealant 6 in the positional relationship shown in FIG. 2, a ferroelectric liquid crystal 5 (trade name: C5-1014, manufactured by Chisso Corporation) was sealed. A liquid crystal display device was obtained.
このようにして得られたパネルヒーター付液晶表示装置
を駆動回路と接続し、液晶表示装置を駆動すると同時に
パネルヒーターに通電した。この時、環境温度１０℃、
電圧６０■、電流０．５ Ａの定常状態で、液晶表示装
置の温度分布は一定かつ、均一（４０℃±２．５℃）に
保たれた。このことは、温度変化に影響され易い強読電
液晶表示装置の駆動回路の簡略化が可能になることを意
味する。The thus obtained liquid crystal display device with a panel heater was connected to a drive circuit, and power was applied to the panel heater at the same time as driving the liquid crystal display device. At this time, the environmental temperature was 10℃,
In a steady state with a voltage of 60 cm and a current of 0.5 A, the temperature distribution of the liquid crystal display device was kept constant and uniform (40° C.±2.5° C.). This means that it is possible to simplify the drive circuit of the strong-reading liquid crystal display device, which is easily affected by temperature changes.
え五■ユ
第３図（ａ）は、本発明の他の実施例に係るパネルヒー
ターの平面図であり、第３図（ｂ）は、そのＡ−Ａ’断
面図である。第３図中、１はガラス基板、３．３’ 、
３’はＩＴＯ膜、４．４′はヒーター取出電極をそれぞ
れ示す。FIG. 3(a) is a plan view of a panel heater according to another embodiment of the present invention, and FIG. 3(b) is a sectional view taken along the line AA'. In Fig. 3, 1 is a glass substrate, 3.3',
3' indicates an ITO film, and 4.4' indicates a heater lead electrode.
かかるパネルヒーターは以下のようにして作成した。Such a panel heater was created as follows.
実施例１と同様のガラス基板１の全面にＩＴＯ膜３を厚
さ４００人成膜した０次に、形状の異なる２種類のハー
ドマスクを用いて、４０人づつ２回に分けて成膜するこ
とでＩＴＯ膜３′および３″を形成し、第３図（ａ）お
よび（ｂ）に示す形状のパネルヒーターを得た。この透
明パネルヒーターの透明導電膜の膜厚も最大値（ｄ、、
、）が４８０人、最小値（ｄ＠ｔｎ）が４００人であり
、ｄ ｍａｗ／ ｄ １ｎ ；２： １．１ ｓｄ ｗ
ａｘ ””’ ｄ ＋ｍｌｎ ≦ １００人を満足し
ていた。The ITO film 3 was deposited on the entire surface of the glass substrate 1 as in Example 1 to a thickness of 400 people.Next, the ITO film 3 was deposited in two batches of 40 people each using two types of hard masks with different shapes. In this way, ITO films 3' and 3'' were formed, and a panel heater having the shape shown in FIGS. 3(a) and 3(b) was obtained. ,
) is 480 people, the minimum value (d@tn) is 400 people, and d maw / d 1n ;2: 1.1 sd w
It was satisfied that ax ``”' d + mln ≦ 100 people.
このパネルヒーターを通常の室内（３００Ｊ２ｘ蛍光燈
下）で目視観察したところ、ＩＴＯ膜の段差を視認する
ことはできなかった。When this panel heater was visually observed in a normal room (under a 300J2x fluorescent light), no step difference in the ITO film could be seen.
本実施例のパネルヒーターの視認性は、従来例より優れ
ていることはもちろん、さらに実施例１よりも改善され
たものであった。The visibility of the panel heater of this example was not only superior to the conventional example, but also improved over Example 1.
実施例１と同様にして、ヒーター面内の温度分布の均一
性を求めたところ、環境温度１０℃、電圧６０Ｖ、電流
０．５Ａの定常状態では実施例１の温度分布が４０℃±
２．５℃であったのに対し、実施例２の温度分布は４
０℃± ２．０℃であった。また環境温度２５℃、電圧
３０Ｖ、電流０．３Ａの定常状態では実施例１の温度分
布が４０℃± １．５℃であったのに対し、実施例２の
温度分布は４０℃± １．０℃であった（第１表参照）
。When the uniformity of the temperature distribution within the heater surface was determined in the same manner as in Example 1, the temperature distribution in Example 1 was 40°C ± 40°C in a steady state with an environmental temperature of 10°C, a voltage of 60V, and a current of 0.5A.
The temperature distribution in Example 2 was 2.5°C, whereas the temperature distribution in Example 2 was 4°C.
The temperature was 0°C±2.0°C. Furthermore, in a steady state with an environmental temperature of 25°C, a voltage of 30V, and a current of 0.3A, the temperature distribution in Example 1 was 40°C ± 1.5°C, whereas the temperature distribution in Example 2 was 40°C ± 1.5°C. It was 0℃ (see Table 1)
.
これらの結果から明らかなように、温度分布の均一性に
ついても従来例および実施例１よりも良好であった。As is clear from these results, the uniformity of temperature distribution was also better than the conventional example and Example 1.
五−」−一去
パネルヒーターの温度分布の均一性
環境温度１０℃ 環境温度２５℃
６０Ｖ Ｏ，５Ａ ３０Ｖ ０．３Ａ実施例１（第
１図）４０℃±２．５℃ ４０℃± １．５℃実施例２
（第３図）４０℃±２．０℃ ４０℃± １．０℃従来
例 （第４図）４０℃±８．０℃ ４０℃±４．０℃［
発明の効果］
以上説明したように、本発明によれば、透明導電膜が膜
厚の厚い領域と薄い領域とを有するので、視認性が良好
でかつ温度分布が均一な透明ノ（ネルヒーターを得るこ
とができた。さらにこの透明パネルヒーターを液晶表示
装置に応用することで、液晶表示装置の低温環境下にお
けるスイッチング特性の改善、駆動回路の簡略化が可能
になる。5. Uniformity of temperature distribution of panel heater Environmental temperature 10°C Environmental temperature 25°C 60V O, 5A 30V 0.3A Example 1 (Fig. 1) 40°C ± 2.5°C 40°C ± 1. 5℃ Example 2
(Fig. 3) 40°C ± 2.0°C 40°C ± 1.0°C Conventional example (Fig. 4) 40°C ± 8.0°C 40°C ± 4.0°C [
Effects of the Invention] As explained above, according to the present invention, since the transparent conductive film has a thick region and a thin region, a transparent conductive film with good visibility and uniform temperature distribution can be used. Furthermore, by applying this transparent panel heater to a liquid crystal display device, it becomes possible to improve the switching characteristics of the liquid crystal display device in a low-temperature environment and to simplify the drive circuit.
第１図（ａ）は、本発明の一実施例に係るパネルヒータ
ーの平面図、
第１図（ｂ）は、第１図（ａ）のＡ−Ａ’断面図、
第２図は、第１図のパネルヒーターを具備する液晶表示
装置の一例を示す図、
第３図（ａ）は、本発明の他の実施例に係るパネルヒー
ターの平面図、
第３図（ｂ）は、第３図（ａ）のＡ−Ａ’断面図、
第４図（ａ）は、従来の膜厚が均一な透明電極を具備す
るパネルヒーターの平面図、
第４図（ｂ）は、第４図（ａ）のＡ−Ａ’断面図、
第５図（ａ）は、従来のバターニングされた透明電極を
具備するパネルヒーターの平面図、第５図（ｂ）は、第
５図（ａ）のＡ−Ａ’断面図である。
１ 。
２ ：
３ 。
４ 。
５ ：
６ ニ
ア 。
８ 。
１′ ニガラス基板、
５ｎｏｚｆｆｌ−
３’ ３”：ＩＴＯ膜、
４′ ：ヒーター取出電極、
液晶、
シール材、
７′ ：画素電極、
８′ ：配向膜。FIG. 1(a) is a plan view of a panel heater according to an embodiment of the present invention, FIG. 1(b) is a sectional view taken along line AA' in FIG. 1(a), and FIG. FIG. 3(a) is a plan view of a panel heater according to another embodiment of the present invention; FIG. 3(b) is a plan view of a panel heater according to another embodiment of the present invention; 4(a) is a plan view of a panel heater equipped with a conventional transparent electrode having a uniform film thickness; FIG. 4(b) is a sectional view taken along line AA' in FIG. 5(a) is a plan view of a panel heater equipped with a conventional patterned transparent electrode, and FIG. 5(b) is a sectional view taken along line AA' in FIG. 5(a). It is an AA' cross-sectional view. 1. 2:3. 4. 5: 6 near. 8. 1' glass substrate, 5nozffl-3'3'': ITO film, 4': heater extraction electrode, liquid crystal, sealing material, 7': pixel electrode, 8': alignment film.
Claims (4)
電膜と、該導電膜の両端部に設けられたヒーター取出電
極とを有するパネルヒーターであって、前記透明導電膜
が膜厚の厚い領域と薄い領域とを有することを特徴とす
るパネルヒーター。(1) A panel heater comprising an insulating transparent substrate, a transparent conductive film provided on the substrate, and heater lead-out electrodes provided at both ends of the conductive film, wherein the transparent conductive film has a thickness A panel heater characterized by having a thick region and a thin region.
最小値ｄ＿ｍ＿ｉ＿ｎの関係が ｄ＿ｍ＿ａ＿ｘ／ｄ＿ｍ＿ｉ＿ｎ≧１．１、ｄ＿ｍ＿ａ
＿ｘ−ｄ＿ｍ＿ｉ＿ｎ≦１００Åを満足する、請求項１
に記載のパネルヒーター。(2) The relationship between the maximum value d_m_a_x and the minimum value d_m_i_n of the film thickness of the transparent conductive film is d_m_a_x/d_m_i_n≧1.1, d_m_a
Claim 1, which satisfies _x-d_m_i_n≦100 Å.
Panel heater described in.
ことを特徴とするパネルヒーター付液晶装置。(3) A liquid crystal device equipped with a panel heater, characterized in that the panel heater according to claim 1 or 2 is provided.
チックＣ相を有する強誘電性液晶である請求項３に記載
のパネルヒーター付液晶装置。(4) The liquid crystal device with a panel heater according to claim 3, wherein the liquid crystal used in the liquid crystal display device is a ferroelectric liquid crystal having a chiral smectic C phase.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31073389A JPH03172820A (en) | 1989-12-01 | 1989-12-01 | Panel heater and liquid crystal device with panel heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31073389A JPH03172820A (en) | 1989-12-01 | 1989-12-01 | Panel heater and liquid crystal device with panel heater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03172820A true JPH03172820A (en) | 1991-07-26 |
Family
ID=18008830
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP31073389A Pending JPH03172820A (en) | 1989-12-01 | 1989-12-01 | Panel heater and liquid crystal device with panel heater |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03172820A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020045410A1 (en) * | 2018-08-29 | 2020-03-05 | 日本電気硝子株式会社 | Heater substrate having conductive film attached thereto and optical device |
| WO2020045409A1 (en) * | 2018-08-29 | 2020-03-05 | 日本電気硝子株式会社 | Optical device and heater substrate having conductive film attached thereto |
-
1989
- 1989-12-01 JP JP31073389A patent/JPH03172820A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020045410A1 (en) * | 2018-08-29 | 2020-03-05 | 日本電気硝子株式会社 | Heater substrate having conductive film attached thereto and optical device |
| WO2020045409A1 (en) * | 2018-08-29 | 2020-03-05 | 日本電気硝子株式会社 | Optical device and heater substrate having conductive film attached thereto |
| JPWO2020045409A1 (en) * | 2018-08-29 | 2021-08-10 | 日本電気硝子株式会社 | Optical device and heater substrate with conductive film |
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