JP2019120794A - Dimming device and method for driving dimming device - Google Patents
Dimming device and method for driving dimming device Download PDFInfo
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Abstract
Description
本発明は、車両や建築物などの調光スクリーンや調光窓に使用される調光装置とその駆動方法に関する。 The present invention relates to a light control device used for a light control screen or light control window of a vehicle, a building or the like, and a driving method thereof.
調光装置に使用される調光機能部材としては、調光層を２枚の透明電極付のガラス板の透明電極側を向い合わせにして挟み込んだ調光合わせガラスや透明電極付の透明樹脂基材の透明電極側を向い合わせにして挟み込んだ積層体からなる調光シートが使用されている。 As a light control functional member used for a light control device, a light control laminated glass with a light control layer sandwiched between two glass plates with transparent electrodes facing the transparent electrode side or a transparent resin base with a transparent electrode The light control sheet which consists of a laminated body pinched facing the transparent electrode side of material is used.
従来、調光機能部材に使用される透明電極には、ガラス板や透明樹脂基材の表面に透明導電膜が一面に形成されたベタ電極が使用されてきた。 Conventionally, a solid electrode in which a transparent conductive film is formed on one surface of a glass plate or a transparent resin base material has been used as a transparent electrode used for a light control function member.
このような調光機能部材を使用した調光装置において、中間的な遮光状態（または光散乱状態）を得ようとする場合、電極間に印加する電圧を、透明な状態（光散乱の無い状態）が得られる電圧と光散乱が強く不透明な状態が得られる電圧の中間的な電圧（半透明な状態）に設定する事によって実現していた。しかしながら、中間的な電圧においては、調光機能部材の調光層を形成する液晶層の配向ムラに起因するムラが発生し易い問題があった。 In a light control apparatus using such a light control function member, when an intermediate light shielding state (or light scattering state) is to be obtained, the voltage applied between the electrodes is in a transparent state (state without light scattering) ) Is realized by setting the voltage intermediate between the voltage at which light is obtained and the voltage at which light scattering is strongly opaque (semitransparent state). However, at an intermediate voltage, there has been a problem that unevenness due to alignment unevenness of the liquid crystal layer forming the light control layer of the light control function member tends to occur.
そのため、半透明な状態をムラ無く実現可能な調光装置が求められていた。しかしながら半透明な状態をムラ無く実現可能な調光装置に関する先行技術を見出すことはできなかった。もっとも近い技術としては、例えば特許文献１に優れた広視野角特性と高速応答性とを同時に実現することができる液晶表示装置が開示されているが、これは調光装置に関する技術ではない。 Therefore, a light control device capable of achieving a semi-transparent state without unevenness has been desired. However, it has not been possible to find prior art concerning a light control device that can achieve a translucent state without unevenness. As the closest technology, for example, Patent Document 1 discloses a liquid crystal display device capable of simultaneously realizing excellent wide viewing angle characteristics and high speed response, but this is not a technology related to a light control device.
上記の事情に鑑み、本発明は半透明な状態をムラ無く実現可能な調光装置を提供することを課題とする。 SUMMARY OF THE INVENTION In view of the above-described circumstances, it is an object of the present invention to provide a light control device which can realize a semi-transparent state without unevenness.
上記の課題を解決する手段として、本発明の第一の態様は、透明電極を備えた２枚の透明樹脂基材の透明電極の間に調光層を積層してなる調光シートを、接着層を介してガラス基板に接着してなる調光装置において、
少なくとも一方の透明電極は櫛型電極からなり、もう一方の透明電極はベタ電極からなり、
櫛型電極の２つの対向する電極は、ベタ電極との間に印加する電圧をそれぞれ独立して制御可能に電源に接続されていることを特徴とする調光装置である。
As means for solving the above problems, according to a first aspect of the present invention, a light control sheet formed by laminating a light control layer between transparent electrodes of two transparent resin substrates provided with a transparent electrode is adhered In a light control device formed by bonding to a glass substrate through a layer,
At least one of the transparent electrodes comprises a comb-shaped electrode, and the other transparent electrode comprises a solid electrode,
The two opposing electrodes of the comb-shaped electrode are connected to a power source so as to be capable of independently controlling the voltage applied between them and the solid electrode.
このように櫛型電極の２つの対向する電極に、櫛型電極と調光層を介して対向する側にあるベタ電極との間に印加する電圧を、それぞれ自由に設定できる構成にしておくことにより、一方の電極に、例えばノーマルモードの調光層が透明になる電圧を印加し、同時に
もう一方の電極には電圧を印加しない不透明な状態を実現可能となる。リバースモードの調光層の場合は逆になる。
In this manner, the voltage applied between the comb electrode and the solid electrode on the opposite side via the light control layer can be freely set to each of the two opposing electrodes of the comb electrode. As a result, it is possible to realize an opaque state in which, for example, a voltage at which the light control layer in the normal mode becomes transparent is applied to one of the electrodes and at the same time no voltage is applied to the other electrode. The reverse is true for the light control layer in reverse mode.
また、第二の態様は、第一の態様に記載の前記調光装置の前記調光層がノーマルモードである調光装置を透明な状態と不透明な状態の中間である半透明な状態にする調光装置の駆動方法であって、
前記櫛型電極のいずれか一方の電極に前記調光層が透明な状態になる交番電圧と同じ振幅で且つその交番電圧より小さい実効値の交番電圧を印加し、且つもう一方の電極には前記調光層が透明な状態になる交番電圧から位相をずらした交番電圧を印加することを特徴とする調光装置の駆動方法である。
In a second aspect, the light control device of the light control device according to the first aspect makes a light control device in a normal mode a semitransparent state intermediate between a transparent state and an opaque state. It is a driving method of a light control device, and
An alternating voltage having the same amplitude as the alternating voltage at which the light control layer becomes transparent and an effective value smaller than the alternating voltage is applied to one of the electrodes of the comb-like electrode, and the other electrode is It is a driving method of a light control device characterized by applying an alternating voltage whose phase is shifted from the alternating voltage when the light control layer becomes transparent.
また、第三の態様は、第一の態様に記載の前記調光装置の前記調光層がリバースモードである調光装置を透明な状態と不透明な状態の中間である半透明な状態にする調光装置の駆動方法であって、
前記櫛型電極のいずれか一方の電極に前記調光層が不透明な状態になる交番電圧と同じ振幅で且つその交番電圧より小さい実効値の交番電圧を印加し、且つもう一方の電極には前記調光層が不透明な状態になる交番電圧から位相をずらした交番電圧を印加することを特徴とする調光装置の駆動方法である。
In a third aspect, the light control device of the light control device according to the first aspect makes the light control device in reverse mode a semi-transparent state intermediate between a transparent state and an opaque state. It is a driving method of a light control device, and
An alternating voltage having the same amplitude as the alternating voltage at which the light control layer is in an opaque state and an effective value smaller than the alternating voltage is applied to one of the electrodes of the comb-like electrode, and the other electrode is It is a driving method of a light control device characterized by applying an alternating voltage whose phase is shifted from the alternating voltage at which the light control layer is in an opaque state.
調光層がノーマルモードの場合、透明な状態にするには、櫛型電極の両方の電極とベタ電極に十分大きな振幅と十分大きな実効値を持つ電圧を印加すれば良い。不透明な状態にするには、対向する一対の櫛型電極とベタ電極の間に印加する交番電圧をＯＦＦすれば良い。また、それらの透明な状態と不透明な状態の中間である半透明な状態にするには、透明な状態にすることができる交番電圧と同じ振幅を持ち、且つその交番電圧より実効値が小さく、且つ櫛型電極の一方の電極ともう一方の電極に印加する交番電圧の位相をずらすことによって実施することができる。 When the light control layer is in the normal mode, a voltage having a sufficiently large amplitude and a sufficiently large effective value may be applied to both of the comb-like electrodes and the solid electrode in order to achieve a transparent state. In order to obtain an opaque state, the alternating voltage applied between the pair of opposing comb electrodes and the solid electrode may be turned off. In addition, in order to make a semitransparent state intermediate between those transparent and opaque states, it has the same amplitude as an alternating voltage that can be made transparent, and its effective value is smaller than that of the alternating voltage, And it can implement by shifting the phase of the alternating voltage applied to one electrode of the interdigital electrode and the other electrode.
また、調光層がリバースモードの場合、不透明な状態にするには、櫛型電極の両方の電極とベタ電極に十分大きな振幅と十分大きな実効値を持つ電圧を印加すれば良い。透明な状態にするには、対向する一対の櫛型電極とベタ電極の間に印加する交番電圧をＯＦＦすれば良い。また、それらの透明な状態と不透明な状態の中間である半透明な状態にするには、不透明な状態にすることができる交番電圧と同じ振幅を持ち、且つその交番電圧より実効値が小さく、且つ櫛型電極の一方の電極ともう一方の電極に印加する交番電圧の位相をずらすことによって実施することができる。 Further, when the light control layer is in the reverse mode, in order to make it opaque, a voltage having a sufficiently large amplitude and a sufficiently large effective value may be applied to both the comb electrodes and the solid electrode. In order to achieve a transparent state, an alternating voltage applied between a pair of opposing comb electrodes and a solid electrode may be turned off. Also, in order to make it semi-transparent between those transparent and opaque states, it has the same amplitude as the alternating voltage which can be made opaque, and its effective value is smaller than that alternating voltage, And it can implement by shifting the phase of the alternating voltage applied to one electrode of the interdigital electrode and the other electrode.
本発明の調光装置は、調光層の両面に備えられた電極の一方が櫛型電極であり、他方がベタ電極であるため、透明（ノーマルモードの調光層の場合）または不透明（リバースモードの調光層の場合）な状態にすることができる交番電圧と同じ振幅を持ち、且つ実効値が小さく、且つ櫛型電極の一方とベタ電極間に印加する電圧およびもう一方の電極とベタ電極間に印加する電圧の位相をずらすことによって、透明な状態と不透明な状態の中間である半透明な状態にすることができる。 The light control device of the present invention is transparent (in the case of the light control layer in the normal mode) or opaque (reverse) because one of the electrodes provided on both sides of the light control layer is a comb electrode and the other is a solid electrode. (In the case of the light control layer of the mode) having the same amplitude as the alternating voltage which can be brought into the state, and with a small effective value, and the voltage applied between one of the comb electrodes and the solid electrode By shifting the phase of the voltage applied between the electrodes, it is possible to achieve a semitransparent state intermediate between the transparent state and the opaque state.
＜調光装置＞
本発明の調光装置を図１および図２を用いて説明する。
図２に示す様に、本発明の調光装置４０は、調光シート３０を、接着層１３を介してガラス基板１２に接着してなる調光装置である。
<Light control device>
The light control apparatus of the present invention will be described with reference to FIGS. 1 and 2.
As shown in FIG. 2, the light control device 40 of the present invention is a light control device formed by bonding the light control sheet 30 to the glass substrate 12 through the adhesive layer 13.
調光シート３０は、透明樹脂基材８上に櫛型電極５が形成された櫛型電極シート１０と、透明樹脂基材９上にベタ電極６が形成されたベタ電極シート２０との、櫛型電極５とベタ電極６とを対面させた内側に調光層１１を挿入して積層した構成となっている。 The light control sheet 30 is a comb of the comb electrode sheet 10 in which the comb electrode 5 is formed on the transparent resin base 8 and the solid electrode sheet 20 in which the solid electrode 6 is formed on the transparent resin base 9. The light control layer 11 is inserted and laminated inside the mold electrode 5 and the solid electrode 6 facing each other.
図１に示す様に、櫛型電極５の２つの対向する電極１、電極２（図１（ａ）参照）は、ベタ電極６（図１（ｂ）参照）との間に印加する電圧をそれぞれ独立して制御可能に電源（図示省略）に接続されている。 As shown in FIG. 1, the two opposing electrodes 1 and 2 (see FIG. 1 (a)) of the comb-shaped electrode 5 apply a voltage to be applied to the solid electrode 6 (see FIG. 1 (b)). Each is independently and controllably connected to a power supply (not shown).
このように、電極１とベタ電極６の間に印加する電圧および電極２とベタ電極６の間に印加する電圧を、独立して制御可能に電源に接続されていることによって、例えば、調光層１１がノーマルモードの材料である場合は、調光層１１が透明になる電圧を電極１とベタ電極６の間に印加し、電極２とベタ電極６の間には電圧を印加しないことにより、調光層１１にムラを生じさせることなく電極１とベタ電極６の間の調光層１１を透明にし、電極２とベタ電極６の間の調光層１１を不透明にすることができる。このことにより、調光シート３０としては、透明な状態と不透明な状態の中間の状態である半透明な状態を実現することができる。調光層１１がリバースモードの材料である場合は、電圧を印加することによって不透明になり、電圧を印加しないことによって透明になる事が異なるだけである。 As described above, for example, the light control is performed by connecting the voltage applied between the electrode 1 and the solid electrode 6 and the voltage applied between the electrode 2 and the solid electrode 6 to the power source so as to be independently controllable. When the layer 11 is a normal mode material, a voltage that makes the light control layer 11 transparent is applied between the electrode 1 and the solid electrode 6, and no voltage is applied between the electrode 2 and the solid electrode 6. The light control layer 11 between the electrode 1 and the solid electrode 6 can be made transparent without causing unevenness in the light control layer 11, and the light control layer 11 between the electrode 2 and the solid electrode 6 can be made opaque. As a result, the light control sheet 30 can realize a semitransparent state which is an intermediate state between the transparent state and the opaque state. When the light control layer 11 is a reverse mode material, it becomes opaque by applying a voltage and becomes transparent by not applying a voltage.
図２に例示した調光装置４０の製造方法について説明する。
本発明の調光装置４０は、ガラス基板１２に接着層１３を介して調光シート３０を貼り付けることによって製造することができる。
A method of manufacturing the light control device 40 illustrated in FIG. 2 will be described.
The light control device 40 of the present invention can be manufactured by bonding the light control sheet 30 to the glass substrate 12 via the adhesive layer 13.
調光シート３０は、別工程にて製造すれば良い。調光シート３０の製造方法は、特に限定する必要は無い。例えば、まず透明樹脂基材９の上にベタ電極６を形成する。ベタ電極６の形成方法は、例えばＩＴＯ（Ｉｎｄｉｕｍ Ｔｉｎ Ｏｘｉｄｅ）などの透明導電性薄膜を直流マグネトロンスパッタ装置などの薄膜形成装置を用いて透明樹脂基材９の上に形成する。次にエッチングレジストパターンをスクリーン印刷やフォトリソグラフィー技術を用いて形成した後、透明導電性薄膜をエッチング除去し、その後エッチングレジストを剥離処理する事によってえることができる。或いは、薄膜形成装置で明樹脂基材８の上に形成する時に透明導電性薄膜を形成する部位のみに開口部を備えた金属薄板製の蒸着マスクを用いてベタ電極６を形成することも可能である。 The light control sheet 30 may be manufactured in a separate process. It is not necessary to specifically limit the manufacturing method of the light control sheet 30. For example, first, the solid electrode 6 is formed on the transparent resin substrate 9. The solid electrode 6 is formed by, for example, forming a transparent conductive thin film such as ITO (Indium Tin Oxide) on the transparent resin substrate 9 using a thin film forming apparatus such as a direct current magnetron sputtering apparatus. Next, after forming an etching resist pattern using screen printing or photolithography technology, the transparent conductive thin film can be removed by etching, and then the etching resist can be peeled off. Alternatively, it is possible to form the solid electrode 6 using a vapor deposition mask made of a thin metal plate provided with an opening only at the portion where the transparent conductive thin film is formed when forming on the bright resin substrate 8 by the thin film forming apparatus. It is.
次に、透明樹脂基材８の上に櫛型電極５を形成する。ベタ電極６の形成方法と同様にして製造することができる。 Next, the comb-shaped electrode 5 is formed on the transparent resin substrate 8. The solid electrode 6 can be manufactured in the same manner as the method for forming the solid electrode 6.
この様にしてベタ電極シート２０と櫛型電極シート１０を作製することができる。
次に、ベタ電極シート２０のベタ電極６と櫛型電極シート１０の櫛型電極５にパッド電極３、４、７をそれぞれ形成する。パッド電極３、４、７は、透明電極のままでも良いが、予め半田層を形成しても良いし、導電性接着層や導電性インキ層を形成しても良い。
Thus, the solid electrode sheet 20 and the comb-shaped electrode sheet 10 can be produced.
Next, pad electrodes 3, 4 and 7 are formed on the solid electrode 6 of the solid electrode sheet 20 and the comb electrodes 5 of the comb electrode sheet 10 respectively. The pad electrodes 3, 4 and 7 may be transparent electrodes as they are, but may be previously formed with a solder layer, or may be formed with a conductive adhesive layer or a conductive ink layer.
次に、調光シート３０の透明樹脂基材８または透明樹脂基材９に接着層１３を形成する。接着層１３としては調光シート３０をガラス基板１２に接着でき、透明な材料であれば特に限定する必要はない。 Next, the adhesive layer 13 is formed on the transparent resin substrate 8 or the transparent resin substrate 9 of the light control sheet 30. As the adhesive layer 13, the light control sheet 30 can be adhered to the glass substrate 12, and it is not necessary to be particularly limited as long as it is a transparent material.
次に、調光シート３０を、接着層１３を介してガラス基板１２に接着する。接着する方
法としてはマニュアルでも良いし、専用の装置を使用してガラス基板１２の調光シート３０を貼り付ける位置に位置合わせした後、接着層１３に空気の泡を含まないように貼り付けることでも良い。
Next, the light control sheet 30 is adhered to the glass substrate 12 via the adhesive layer 13. As a method of bonding, a manual method may be used, or after aligning the light control sheet 30 of the glass substrate 12 to a position to which the light control sheet 30 is attached using a dedicated device, adhere the adhesive layer 13 so as not to contain air bubbles. But it is good.
次に、制御装置や駆動装置などの外部装置からの配線（図示省略）を上記のパッド電極３、４、７に接続する。
以上の様にして、本発明の調光装置４０を製造することができる。
Next, a wire (not shown) from an external device such as a control device or a drive device is connected to the above-mentioned pad electrodes 3, 4, 7.
As described above, the light control device 40 of the present invention can be manufactured.
＜調光装置の駆動方法＞
次に本発明の調光装置の駆動方法について説明する。
本発明の調光装置の駆動方法は、本発明の調光装置を透明な状態と不透明な状態の中間である半透明な状態にする調光装置の駆動方法である。
調光層がノーマルモードである場合は、櫛型電極のいずれか一方の電極に調光層が透明な状態になる交番電圧と同じ振幅で且つその交番電圧より小さい実効値の交番電圧を印加し、且つもう一方の電極には前記調光層が透明な状態になる交番電圧から位相をずらした交番電圧を印加する。
また、調光層がリバースモードである場合は、櫛型電極のいずれか一方の電極に調光層が不透明な状態になる交番電圧と同じ振幅で且つその交番電圧より小さい実効値の交番電圧を印加し、且つもう一方の電極には調光層が不透明な状態になる交番電圧から位相をずらした交番電圧を印加する。
<Driving method of light control device>
Next, the driving method of the light control device of the present invention will be described.
The driving method of the light control device of the present invention is a driving method of the light control device for making the light control device of the present invention in a semi-transparent state intermediate between the transparent state and the opaque state.
When the light control layer is in the normal mode, apply an alternating voltage having an effective value smaller than that of the alternating voltage and having the same amplitude as the alternating voltage at which the light control layer is in a transparent state. And to the other electrode is applied an alternating voltage that is out of phase from the alternating voltage at which the light control layer becomes transparent.
In addition, when the light control layer is in the reverse mode, an alternating voltage having the same amplitude as the alternating voltage at which the light control layer becomes opaque and an effective value smaller than the alternating voltage is applied to either one of the comb electrodes. An alternating voltage is applied to the other electrode, which is out of phase with the alternating voltage at which the light control layer is in an opaque state.
表１を用いて更に詳しく説明する。
表１は調光装置に使用する調光シートの調光層としてノーマルモードの調光層を使用した場合を例として説明している。
This will be described in more detail using Table 1.
Table 1 illustrates the case where a normal mode light control layer is used as a light control layer of a light control sheet used for a light control device as an example.
上記で調光装置の透明な状態とは、調光シートのヘイズの値が低い場合に該当する。またヘイズの値が十分大きい場合は不透明な状態になる。ヘイズの値がそれらのヘイズの値の中間的な値をとる場合に、半透明な状態となる。 The transparent state of the light control device corresponds to the case where the haze value of the light control sheet is low. In addition, when the value of the haze is sufficiently large, it becomes opaque. When the haze value takes an intermediate value of those haze values, it becomes translucent.
また、電圧は交番電圧（交流電圧とも言う。）を使用する。調光層１１を構成する液晶材料は交番電圧を印加することによって駆動することができるためである。交番電圧は、表１に例示したような０（ボルト）を基準として、プラスとマイナスの方向に交互に変化する矩形状のパルス電圧であっても良いし、三角波やノコギリ波、正弦波などであっても良い。またプラスの方向の振幅とマイナスの方向の振幅が必ずしも一致していなくても構わない。 Further, the voltage uses an alternating voltage (also referred to as an alternating voltage). It is because the liquid crystal material which comprises the light control layer 11 can be driven by applying an alternating voltage. The alternating voltage may be a rectangular pulse voltage alternately changing in the positive and negative directions with reference to 0 (volts) as illustrated in Table 1, or may be a triangular wave, a sawtooth wave, a sine wave, or the like. It may be. Also, the amplitude in the positive direction and the amplitude in the negative direction do not necessarily have to match.
ノーマルモードの調光シート３０においては、図１における櫛型電極５の一方の電極１と調光層１１を挟んで調光シート３０（図２参照）の対向する側にあるベタ電極６の間に印加する電圧と電極２とベタ電極６の間に印加する電圧を、表１の「不透明な状態」の欄に示した様に、０（電圧を印加しない状態）とすると、調光シート３０は不透明な状態になる。 In the light control sheet 30 in the normal mode, between the solid electrode 6 on the opposite side of the light control sheet 30 (see FIG. 2) with the light control layer 11 interposed between one of the electrodes 1 of the comb electrode 5 in FIG. Assuming that the voltage applied to the light source and the voltage applied between the electrode 2 and the solid electrode 6 are 0 (state in which no voltage is applied) as shown in the “opaque state” column of Table 1, the light control sheet 30 Becomes opaque.
表１の「透明な状態」の欄に示した様に、電極１とベタ電極６の間および電極２とベタ電極６の間に印加する電圧を、ある振幅以上で同じ位相の交番電圧を印加することにより、ヘイズの値が十分小さい透明な状態となる。 As shown in the "transparent state" column of Table 1, voltages to be applied between the electrode 1 and the solid electrode 6 and between the electrode 2 and the solid electrode 6 are applied with alternating voltages of the same phase at a certain amplitude or more. As a result, the value of the haze becomes a sufficiently small transparent state.
また、表１の「半透明な状態」の欄に示した様に、電極１とベタ電極６の間に透明な状態の欄で示したパルス電圧の振幅と同じであるが、その振幅を維持する時間を短くした、すなわち実効電圧を小さくした、パルス電圧を印加している場合を例示している。また、その時、電極２とベタ電極６の間に印加する電圧は、電極１とベタ電極６の間に印加した
パルス電圧の振幅と同じであるが、位相がずれている。そのため、電極１側が透明な時は電極２側が不透明であり、逆に電極２側が透明な時は電極１側が不透明となっている。このようにして、透明と不透明の中間的な状態が作り出すことができる。
Also, as shown in the "semi-transparent state" column of Table 1, the same as the amplitude of the pulse voltage shown in the transparent state column between the electrode 1 and the solid electrode 6, but the amplitude is maintained In the illustrated example, the pulse voltage is applied in a shorter time, ie, with a smaller effective voltage. Also, at this time, the voltage applied between the electrode 2 and the solid electrode 6 is the same as the amplitude of the pulse voltage applied between the electrode 1 and the solid electrode 6, but the phase is shifted. Therefore, when the electrode 1 side is transparent, the electrode 2 side is opaque, and conversely, when the electrode 2 side is transparent, the electrode 1 side is opaque. In this way, an intermediate state between transparent and opaque can be created.
リバースモードの場合は、これらの関係が逆になる。すなわち不透明な状態は、電圧を印加した状態で実現し、透明な状態は、電圧を印加しない状態で実現することになる。 In reverse mode, these relationships are reversed. That is, the opaque state is realized when a voltage is applied, and the transparent state is realized when a voltage is not applied.
また、表１の「半透明な状態」の欄において、印加するパルス電圧の振幅の大きさはそのままにして、且つ電極１と電極２に印加する電圧の位相をずらしたままにして、パルス電圧の１周期の中に占める時間を長くしたり、短くしたりすることにより、すなわち実効電圧を大きくしたり小さくしたりすることにより、調光シートのヘイズの値、すなわち半透明の状態を変化させる事が可能である。調光層のムラは、印加する電圧の振幅が十分に大きくない時に発生する。本発明の駆動方法の様に、十分に大きな振幅を持つ電圧を印加するためムラは発生させずに、電圧の実効値を上下することによりヘイズを変化させることができる。 Also, in the "semi-transparent state" column of Table 1, the pulse voltage is applied while the amplitude of the pulse voltage to be applied is kept as it is and the phase of the voltage applied to the electrode 1 and the electrode 2 is shifted. The value of the haze of the light control sheet, that is, the semitransparent state is changed by lengthening or shortening the time occupied in one cycle of, that is, increasing or decreasing the effective voltage. Things are possible. The unevenness of the light control layer occurs when the amplitude of the voltage to be applied is not sufficiently large. As in the driving method of the present invention, since a voltage having a sufficiently large amplitude is applied, unevenness can not be generated, and the haze can be changed by raising and lowering the effective value of the voltage.
次に、本発明の実施例について説明する。 Next, examples of the present invention will be described.
＜調光シートの作製＞
透明樹脂基材として、厚さ５０μｍのＰＥＴ（ポリエチレンテレフタレート）フィルム上に、ＩＴＯ（Ｉｎｄｉｕｍ Ｔｉｎ Ｏｘｉｄｅ）薄膜を直流マグネトロンスパッタ装置にて１００ｎｍの厚みになるように成膜し、透明導電シートを作製した。
<Preparation of a light control sheet>
An ITO (Indium Tin Oxide) thin film was formed on a 50 μm thick PET (polyethylene terephthalate) film as a transparent resin substrate to a thickness of 100 nm by a DC magnetron sputtering apparatus to prepare a transparent conductive sheet. .
次に、その透明導電シートを縦３０ｃｍ×横３０ｃｍのサイズに断才し、同じサイズの透明導電シートを２枚作製した。 Next, the transparent conductive sheet was broken into a size of 30 cm long × 30 cm wide, and two transparent conductive sheets of the same size were produced.
次に、一方の透明導電シートのＩＴＯ薄膜側にスクリーン印刷にて、ベタ電極を作製するエッチングレジストパターンを印刷し、乾燥後、ＩＴＯ薄膜をエッチングし、エッチングレジストを剥離処理することにより、ベタ電極シートを得た。パッド電極（図１（ｂ）におけるパッド電極７）はＩＴＯ薄膜パターンをそのまま使用した。 Next, an etching resist pattern for producing a solid electrode is printed by screen printing on the ITO thin film side of one transparent conductive sheet, and after drying, the ITO thin film is etched and the etching resist is peeled off to form a solid electrode. I got a sheet. As the pad electrode (the pad electrode 7 in FIG. 1B), an ITO thin film pattern was used as it was.
同様にして、もう一方の透明導電シートのＩＴＯ薄膜側にロールコータにて感光性レジストを塗布し、乾燥後、櫛型電極を形成するフォトマスクを用いて感光性レジストを露光し、現像・水洗・加熱処理することによりレジストパターンを得た。そのレジストパターンをエッチングマスクとして、ＩＴＯ薄膜をエッチングした後、レジストパターンを剥離処理することにより、櫛型電極シートを得た。 Similarly, a photosensitive resist is applied to the ITO thin film side of the other transparent conductive sheet with a roll coater, and after drying, the photosensitive resist is exposed using a photomask for forming a comb electrode, developed and washed. A resist pattern was obtained by heat treatment. The ITO thin film was etched using the resist pattern as an etching mask, and the resist pattern was peeled to obtain a comb-shaped electrode sheet.
櫛型電極のピッチは５ｍｍ、櫛型電極の線幅は４ｍｍとした。そのため、櫛型電極間の隙間は１ｍｍとして、図１に例示したのと同様の形態を持つ櫛型電極シートを作製した。 The pitch of the interdigital electrodes was 5 mm, and the line width of the interdigital electrodes was 4 mm. Therefore, a comb-like electrode sheet having a form similar to that illustrated in FIG. 1 was produced, with the gap between the comb-like electrodes being 1 mm.
また、外部装置との接続電極であるパッド電極（図１（ａ）におけるパッド電極３、４）は、ＩＴＯ薄膜パターンをそのまま使用した。 In addition, as the pad electrodes (pad electrodes 3 and 4 in FIG. 1A) which are connection electrodes with the external device, the ITO thin film pattern was used as it is.
次に、リバースモードの調光材料を、櫛型電極シートの櫛型電極上にバーコータを用いて塗布後、塗布された調光材料の上からベタ電極シートのベタ電極側を、ラミネータを用いて積層し、調光シートを得た。 Next, after applying the reverse mode light control material on the comb electrode of the comb electrode sheet using a bar coater, the solid electrode side of the solid electrode sheet from the top of the applied light control material using a laminator It laminated | stacked and obtained the light control sheet.
次に、作製した調光シートの櫛型電極シートの透明樹脂基材上に接着層をスクリーン印刷後、その接着層を介して、縦３０ｃｍ×横３０ｃｍ×厚さ０．７ｍｍの無アルカリガラ
ス板に貼り付けた。
Next, after screen-printing an adhesive layer on the transparent resin substrate of the comb-shaped electrode sheet of the light control sheet produced, an alkali-free glass plate of 30 cm long × 30 cm wide × 0.7 mm thick via the adhesive layer I paste it to
次に、パッド電極３、４およびパッド電極７に調光シートに交番電圧を印加する電源装置からの配線を接続した。電源装置側からの配線と、パッド電極３、４およびパッド電極７との接続には導電性接着シートを使用した。 Next, a wire from a power supply device for applying an alternating voltage to the light control sheet was connected to the pad electrodes 3 and 4 and the pad electrode 7. A conductive adhesive sheet was used to connect the wiring from the power supply side to the pad electrodes 3 and 4 and the pad electrode 7.
この様にして、ガラス板上に調光シートを貼り付けた調光装置を作製した。この調光装置に電源装置からの配線を通して、交番電圧を印加する実験を行った。 Thus, the light control apparatus which stuck the light control sheet on the glass plate was produced. An experiment was conducted in which an alternating voltage was applied to the light control device through the wiring from the power supply.
印加した交番電圧は、表１の透明な状態に対応する条件として、周波数５０Ｈｚ、＋１５ボルトと−１５ボルトの１周期に占める割合を１：１とした、振幅が１５ボルトで、０ボルトを基準として±１５ボルトのパルス電圧を、パッド電極３、４に同期して印加し、透明になることを目視で確認した。 The applied alternating voltage has a frequency of 50 Hz, a ratio of 15% of +15 volts and -15 volts in one cycle as a condition corresponding to the transparent state of Table 1, an amplitude of 15 volts, and a reference of 0 volts. A pulse voltage of ± 15 volts was synchronously applied to the pad electrodes 3 and 4 to visually confirm that the electrode was transparent.
また、不透明な状態は、電圧を印加しない状態を目視により、不透明であることを確認した。この状態では全く調光装置を介して、目視者と反対側にある映像は何も目視できないことを確認した。 Moreover, the opaque state confirmed that it was opaque by visual observation in the state which does not apply a voltage. In this state, it was confirmed through the dimmer that no image could be seen on the opposite side of the viewer.
また、半透明な状態に対応する条件として、周波数５０Ｈｚ、＋１５ボルトと−１５ボルトの１周期に占める割合を１：５とした、振幅が１５ボルトで、０ボルトを基準として±１５ボルトのパルス電圧を、パッド電極３、４に位相をずらして印加し、半透明になることを目視で確認した。半透明な状態は、調光装置を介して、目視者と反対側にある映像が不鮮明ながら目視できることで確認した。 In addition, as a condition corresponding to the semi-transparent state, the ratio of the frequency of 50 Hz, +15 volts and -15 volts occupying one cycle is 1: 5, and the amplitude is 15 volts and ± 15 volts pulse based on 0 volts The voltage was applied to the pad electrodes 3 and 4 while being out of phase, and it was visually confirmed that the voltage became semitransparent. The semi-transparent state was confirmed by the fact that the image on the opposite side to the viewer could be viewed visually while blurred through the light control device.
１・・・（櫛型電極の一方の）電極
２・・・（櫛型電極のもう一方の）電極
３・・・（電極１の）電極パッド
４・・・（電極２の）電極パッド
５・・・櫛型電極
６・・・ベタ電極
７・・・（ベタ電極の）パッド電極
８・・・透明樹脂基材
９・・・透明樹脂基材
１０・・・櫛型電極シート
１１・・・調光層
１２・・・ガラス基板
１３・・・接着層
２０・・・ベタ電極シート
３０・・・調光シート
４０・・・調光装置
1 ... (one of the comb electrodes) electrode 2 ... (the other of the comb electrode) electrode 3 ... (the electrode 1) electrode pad 4 ... (the electrode 2) electrode pad 5 ... Comb-shaped electrode 6 ... solid electrode 7 ... (solid electrode) pad electrode 8 ... transparent resin substrate 9 ... transparent resin substrate 10 ... comb-shaped electrode sheet 11 · · · -Light control layer 12-Glass substrate 13-Adhesive layer 20-Solid electrode sheet 30-Light control sheet 40-Light control device
Claims (3)
一方の透明電極は櫛型電極からなり、もう一方の透明電極はベタ電極からなり、
櫛型電極の互いに隣接する２つの電極は、ベタ電極との間に印加する交番電圧をそれぞれ独立して制御可能に電源に接続されていることを特徴とする調光装置。 In a light control device in which a light control sheet formed by laminating a light control layer between transparent electrodes of two transparent resin base materials provided with a transparent electrode is adhered to a glass substrate via an adhesive layer,
One transparent electrode consists of a comb-like electrode, and the other transparent electrode consists of a solid electrode,
A light control device characterized in that two adjacent electrodes of a comb-shaped electrode are connected to a power supply so as to be capable of independently controlling an alternating voltage applied between them and a solid electrode.
前記櫛型電極のいずれか一方の電極に前記調光層が透明な状態になる交番電圧と同じ振幅で且つその交番電圧より小さい実効値の交番電圧を印加し、且つもう一方の電極には前記調光層が透明な状態になる交番電圧から位相をずらした交番電圧を印加することを特徴とする調光装置の駆動方法。 A driving method of a light control device according to claim 1, wherein the light control layer of the light control device makes a light control device in a normal mode a semi-transparent state intermediate between a transparent state and an opaque state. ,
An alternating voltage having the same amplitude as the alternating voltage at which the light control layer becomes transparent and an effective value smaller than the alternating voltage is applied to one of the electrodes of the comb-like electrode, and the other electrode is A method of driving a light control device, comprising: applying an alternating voltage whose phase is shifted from an alternating voltage at which the light control layer is in a transparent state.
前記櫛型電極のいずれか一方の電極に前記調光層が不透明な状態になる交番電圧と同じ振幅で且つその交番電圧より小さい実効値の交番電圧を印加し、且つもう一方の電極には前記調光層が不透明な状態になる交番電圧から位相をずらした交番電圧を印加することを特徴とする調光装置の駆動方法。 A driving method of a light control device according to claim 1, wherein the light control layer of the light control device is in a reverse mode to make the light control device a semi-transparent state intermediate between a transparent state and an opaque state. ,
An alternating voltage having the same amplitude as the alternating voltage at which the light control layer is in an opaque state and an effective value smaller than the alternating voltage is applied to one of the electrodes of the comb-like electrode, and the other electrode is A driving method of a light control device characterized by applying an alternating voltage whose phase is shifted from an alternating voltage at which a light control layer is in an opaque state.
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