【発明の詳細な説明】〔産業上の利用分野〕本発明は液晶サングラスの回路構成に関する。[Detailed description of the invention][Industrial application field]The present invention relates to a circuit configuration of liquid crystal sunglasses.
従来の液晶サングラスは、電池を電源とする物が一般的
であった。また太陽電池を電源とする場合、太陽電池は
単に電源として回路に直接電力供給するもので、外光の
明るさに応じて太陽電池の出力電圧が決まり、液晶セル
のオン電圧以上になると黒くなるよう構成されていた。Conventional liquid crystal sunglasses have generally been powered by batteries. In addition, when using a solar cell as a power source, the solar cell simply supplies power directly to the circuit, and the output voltage of the solar cell is determined depending on the brightness of the outside light, and if it exceeds the on-voltage of the liquid crystal cell, it becomes black. It was structured like this.
しかし、前述の従来技術では液晶セルのオン電圧のばら
つきがそのままサングラスの透過率の変色点（光が何β
ＵＸの時に黒く変わるが。以下変色点と呼ぶ。）に影響
するため、安定した品質を確保する事が難しいという問
題点を存していた。However, in the conventional technology described above, the variation in the on-voltage of the liquid crystal cell directly affects the color change point of the sunglasses' transmittance (the amount of light β).
Although it changes to black during UX. Hereinafter, this will be referred to as the discoloration point. ), making it difficult to ensure stable quality.
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、太陽電池を使用しながら安定し
た変色点を「する液晶サングラスを提供する事にある。The present invention is intended to solve these problems, and its purpose is to provide liquid crystal sunglasses that maintain a stable discoloration point while using solar cells.
本発明の太陽電池付液晶サングラスは、ａ）液晶を眼が
ねレンズに用いてそのオンオフにより光の透過率を可変
する液晶サングラスにおいて、ｂ）眼がねレンズ表面と同方向を光入射面とする太陽電
池と、Ｃ）該太陽電池を電源とし、前記液晶の駆動に必要な交
流電圧を発生する発振回路と、ｄ）該太陽電池の起電圧が所定の電圧値よりも高い時オ
ン信号を、低い時オフ信号を出力する電圧検出回路と、ｅ）該電圧検出回路の出力に制御されたゲートを有し、
該出力がオン信号の時前記液晶に該交流電圧を印加し、
オフ信号の時該交流電圧を禁止して前記液晶の電極端子
を同電位とする液晶駆動回路とを有することを特徴とす
る。The liquid crystal sunglasses with a solar cell of the present invention are a) liquid crystal sunglasses in which a liquid crystal is used for the eyeglass lens and the light transmittance is varied by turning it on and off, and b) the same direction as the eyeglass lens surface is the light incident surface. C) an oscillation circuit that uses the solar cell as a power source and generates an alternating current voltage necessary for driving the liquid crystal, and d) generates an on signal when the electromotive voltage of the solar cell is higher than a predetermined voltage value. , a voltage detection circuit that outputs an off signal when the voltage is low; e) a gate controlled by the output of the voltage detection circuit;
applying the AC voltage to the liquid crystal when the output is an on signal;
The present invention is characterized by comprising a liquid crystal drive circuit which inhibits the alternating current voltage when an off signal is received to bring the electrode terminals of the liquid crystal to the same potential.
本発明の上記の構成によれば、太陽電池の起電力だけで
回路が動作し、変色点は電圧検出回路により設定され、
液晶の性能に影響されないサングラスを提供することが
可能となる。According to the above configuration of the present invention, the circuit operates only by the electromotive force of the solar cell, and the color change point is set by the voltage detection circuit.
It becomes possible to provide sunglasses that are not affected by the performance of the liquid crystal.
第１図は本発明の実施例における太陽電池付液晶サング
ラスの外観図である。FIG. 1 is an external view of liquid crystal sunglasses with solar cells according to an embodiment of the present invention.
１は太陽電池で、２は液晶セルを示す。液晶セル２は交
流電圧を印加すると光の透過率が下がる物であれば、ゲ
ストホスト型、ＴＮ型等は問わない。また回路部は、太
陽電池１の内側に配置されている。1 is a solar cell, and 2 is a liquid crystal cell. The liquid crystal cell 2 may be of a guest-host type, TN type, etc., as long as the light transmittance decreases when an alternating current voltage is applied. Further, the circuit section is arranged inside the solar cell 1.
′Ｍ２図は本発明の実施例における回路図である。太陽
電池１、電圧検出回路３、発振回路４、液晶駆動回路５
、液晶セル２から構成されている０発振回路４はＮＡＮ
Ｄゲート１１．１２、コンデンサ８、抵抗９からなるＣ
Ｒ発振回路である。（本発明は発振回路の１１類は限定
しない。１例として示したのみ、）また液晶駆動回路５
は出力を制御するＮＡＮＤゲート１３．１４とドライバ
ー１５、ＩＥｉとからなる。電圧検出回路３の詳細は略
す。電源保護コンデンサ７は回路に並列に接続されてい
る。'M2 is a circuit diagram in an embodiment of the present invention. Solar cell 1, voltage detection circuit 3, oscillation circuit 4, liquid crystal drive circuit 5
, the zero oscillation circuit 4 composed of the liquid crystal cell 2 is a NAN
C consisting of D gate 11, 12, capacitor 8, and resistor 9
This is an R oscillation circuit. (The present invention does not limit the type 11 oscillation circuit. This is only shown as an example.) Also, the liquid crystal drive circuit 5
consists of NAND gates 13 and 14 that control output, a driver 15, and IEi. Details of the voltage detection circuit 3 are omitted. A power protection capacitor 7 is connected in parallel to the circuit.
以下、第２図に従って作用を述べる。The operation will be described below according to FIG.
外光が明るくなると、太陽電池１の起電圧が増し、約１
０００ρＵＸで電源電圧は３ｖに達する。電圧検出回路
の検出レベルを４ｖに設定しておくと、この状態では出
力信号６はオフ信号（Ｌ）で液晶セル２には同位相（Ｌ
）の電圧が印加され点灯しない。約５０００ｆ！ｕｘ＠
越すと太陽電池１の起電圧（電源電圧）が４ｖ以上にな
り電圧検出回路３の出力信号６はオン信号（Ｈ）を出力
するため発振回路４の交流信号がインバータ１５．１Ｂ
から逆相となって液晶セルに印加される。駆動周波数は
抵抗９とコンデンサ８によって決められ、数十〜数百Ｈ
ｚが適当である。この時液晶セルのオン電圧は４ｖ以下
にしておけば、液晶は完全にオンして光を遮断し、サン
グラスの効果を示す。When the outside light becomes brighter, the electromotive force of the solar cell 1 increases and becomes approximately 1
At 000ρUX, the power supply voltage reaches 3V. If the detection level of the voltage detection circuit is set to 4V, in this state the output signal 6 is an off signal (L) and the liquid crystal cell 2 has the same phase (L).
) voltage is applied and the light does not light up. About 5000f! ux@
When the voltage is exceeded, the electromotive voltage (power supply voltage) of the solar cell 1 becomes 4V or more, and the output signal 6 of the voltage detection circuit 3 outputs an ON signal (H), so the AC signal of the oscillation circuit 4 is transferred to the inverter 15.1B.
The reverse phase is applied to the liquid crystal cell. The driving frequency is determined by the resistor 9 and capacitor 8, and is several tens to hundreds of H.
z is appropriate. At this time, if the on-voltage of the liquid crystal cell is set to 4V or less, the liquid crystal turns on completely and blocks light, creating the effect of sunglasses.
また、更に光が強くなると、益々太陽電池の電圧は上昇
するが、ある程度（５ｖ程度）で飽和し、回路、液晶へ
の影響はない。Furthermore, as the light becomes stronger, the voltage of the solar cell increases, but it is saturated at a certain level (approximately 5V) and has no effect on the circuit or liquid crystal.
電源保護コンデンサ７は電源へのノイズやリップルを除
去するもので数十μＦ程度が良い。あまり容量が大きい
と、応答性が悪くなり、外光の変化に対しコントラスト
が追従しなくなってしまう。The power supply protection capacitor 7 removes noise and ripples from the power supply, and is preferably about several tens of μF. If the capacitance is too large, the response will be poor and the contrast will not follow changes in external light.
電圧検出回路３は、種々の電源用ＩＣや電池電圧検出回
路等で周知であるため詳細の説明は略す。Since the voltage detection circuit 3 is well known in various power supply ICs, battery voltage detection circuits, etc., detailed explanation will be omitted.
以上述べたように本発明においては液晶セルが充分オン
する電圧以上に電圧検出回路の検出レベルを設定し、該
レベルと変色点における照度が整合するように太陽電池
の照度対電圧特性を選ぶ（太陽電池セルの段数と面積を
設計する）事が必要であるが、液晶のオン電圧のばらつ
きは無視できる。As described above, in the present invention, the detection level of the voltage detection circuit is set above the voltage at which the liquid crystal cell is sufficiently turned on, and the illuminance versus voltage characteristics of the solar cell are selected so that the illuminance at the discoloration point matches this level ( Although it is necessary to design the number and area of solar cells, the variation in the on-voltage of the liquid crystal can be ignored.
また、本発明の応用として電圧検出回路の検出レベルを
ユーザー自身が調整できるように、ボリュームをつける
等改良することができる。Further, as an application of the present invention, it is possible to make improvements such as adding a volume so that the detection level of the voltage detection circuit can be adjusted by the user himself.
更に検出ンベルにヒステリシスを持たせて光の変化に対
して眼の慣れを持たせる事もできる。Furthermore, it is also possible to provide hysteresis to the detection bell to allow the eye to adjust to changes in light.
例えば暗い所から明るい所へ出た時は変色点の照度が高
（（オン電圧になる時は電圧が高く）、逆の場合は照度
が低い（オフ電圧になる時は電圧が低い）ようにする。For example, when going from a dark place to a bright place, the illuminance at the color change point is high ((voltage is high when it becomes on voltage), and in the opposite case, illuminance is low (when it becomes off voltage, voltage is low). do.
これは臨界条件でサングラスがちらつく事を防ぐための
対策にもなる。This also serves as a measure to prevent sunglasses from flickering under critical conditions.
以上述べたように本発明によれば、太陽電池付液晶サン
グラスの変色点を安定させるという効果を有する。ここ
で変色点は液晶のオン電圧以上のポイントで自由に設定
できるため調整の巾も広がり、別の効果も期待できる。As described above, the present invention has the effect of stabilizing the discoloration point of solar cell-equipped liquid crystal sunglasses. Here, the color change point can be freely set at a point higher than the ON voltage of the liquid crystal, which widens the scope of adjustment, and other effects can be expected.
例えばユーザーが自身で変色点をセットできるような応
用が可能となる。（電圧検出回路の電圧検出部を抵抗分
割で何段か設ける等。）更に本発明によれば、変色点以下の時液晶電極を同電位
にするため、発振回路の動作電圧以下になった場合も液
晶にノイズや直流電圧が印加されることを防止し１．液
晶の劣化を防ぐ。For example, it becomes possible to use this technology in applications where users can set their own color change points. (For example, the voltage detection section of the voltage detection circuit is provided in several stages by resistor division.) Furthermore, according to the present invention, since the liquid crystal electrodes are kept at the same potential when the temperature is below the color change point, when the voltage falls below the operating voltage of the oscillation circuit, It also prevents noise and DC voltage from being applied to the liquid crystal.1. Prevents liquid crystal deterioration.
また、外光が変色点付近の照度で変化するとサングラス
がちらつく事が考えられる。この現象は従来の技術では
防止不可能であったが、本発明の応用例として、電圧検
出回路にヒステリシスを持たせ改善することができる。Furthermore, if the outside light changes in illuminance near the color change point, sunglasses may flicker. This phenomenon could not be prevented using conventional techniques, but as an application example of the present invention, it can be improved by providing hysteresis to the voltage detection circuit.
第１図は本発明の太陽電池付液晶サングラスの一実施例
を示す外観図。第２図は本発明の太陽電池付液晶サングラスの一実施例
を示す回路図。１・・・太陽電池２・・・液晶セル３・・・電圧検出回路４・・・発振回路５・・・液晶駆動回路以 上出願人 セイコーエブンン株式会社代理人 弁理士 最 上 務 他１名ｆパ１゛：１−；７″で。FIG. 1 is an external view showing an embodiment of the solar battery-equipped liquid crystal sunglasses of the present invention. FIG. 2 is a circuit diagram showing an embodiment of the solar battery-equipped liquid crystal sunglasses of the present invention. 1...Solar cell 2...Liquid crystal cell 3...Voltage detection circuit 4...Oscillation circuit 5...Liquid crystal drive circuit and above Applicant Seiko Even Co., Ltd. Agent Patent attorney Tsutomu Mogami and others 1 Name f pa 1゛: 1-;7''.
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62310051AJPH01150114A (en) | 1987-12-08 | 1987-12-08 | Liquid crystal sunglass with solar battery |
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62310051AJPH01150114A (en) | 1987-12-08 | 1987-12-08 | Liquid crystal sunglass with solar battery |
| Publication Number | Publication Date |
|---|---|
| JPH01150114Atrue JPH01150114A (en) | 1989-06-13 |
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62310051APendingJPH01150114A (en) | 1987-12-08 | 1987-12-08 | Liquid crystal sunglass with solar battery |
| Country | Link |
|---|---|
| JP (1) | JPH01150114A (en) |
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02230116A (en)* | 1988-05-17 | 1990-09-12 | Baiotoron:Kk | Dimming spectacles |
| WO1999067681A1 (en)* | 1998-06-24 | 1999-12-29 | Alphamicron, Inc. | Variable light attenuating dichroic dye guest-host device |
| US8233102B2 (en) | 2008-02-27 | 2012-07-31 | Rgb Optics, Llc | Apparatus and method for adjustable variable transmissivity polarized eyeglasses |
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02230116A (en)* | 1988-05-17 | 1990-09-12 | Baiotoron:Kk | Dimming spectacles |
| WO1999067681A1 (en)* | 1998-06-24 | 1999-12-29 | Alphamicron, Inc. | Variable light attenuating dichroic dye guest-host device |
| US6239778B1 (en) | 1998-06-24 | 2001-05-29 | Alphamicron, Inc. | Variable light attentuating dichroic dye guest-host device |
| US8233102B2 (en) | 2008-02-27 | 2012-07-31 | Rgb Optics, Llc | Apparatus and method for adjustable variable transmissivity polarized eyeglasses |
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