JPH0613824B2 - Blind using electrophoretic phenomenon - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] [Field of Industrial Application] The present invention relates to a blind utilizing an electrophoretic phenomenon.

[Prior Art] Conventional blinds are difficult to partially shade because they are mechanically operated, and it is difficult to make them thin because they are thick. Further, although it is conceivable to use a liquid crystal as an electric blind, the liquid crystal becomes a blind state only when a voltage is applied, which is uneconomical.

[Problems to be Solved by the Invention] In an electric blind, it was necessary to continuously apply electricity in the blind state.

[Object of the Invention] The object of the present invention is to provide a blind that utilizes an electrophoretic phenomenon.

<Structure of the Present Invention> [Means for Solving Problems] In a blind utilizing an electrophoretic phenomenon obtained by applying a voltage between a dispersion system having a dispersion medium and electrophoretic particles at both electrodes, the blind passes through the blind. A blind using an electrophoretic phenomenon in which a voltage is externally applied to the electrodes to adjust the light to be generated, and the electrophoretic particles are attracted to one of the electrodes to block the light. .

[Operation and Example] FIG. 1 is a sectional view of the blind 100.

The blind 100 uses an electrophoretic phenomenon, and is composed of the substrates 13 and 13 'and the spacers 15 and 15'.
It consists of two housings. Inside the housing, a dispersion medium 11 such as ethane tetrachloride difluoride system colored with ink or paint and electrophoretic particles 12 such as titanium oxide are contained. Then, the electrophoretic particles 12 are dispersed in the dispersion medium 11 to form the dispersion system 10. The electrodes 14 and 14 'are the dispersion system 1
It is set with 0 in between.

The light source is on the right side of FIG. 1 and the observer is on the left side. Now, if a positive voltage is applied to all the electrodes 14 'on the light source side and a negative voltage is applied to the electrodes 14 on the observer side, the electrophoretic particles 12
Are attracted to the electrode 14 ', and the light source is blocked on the observer side and can be used as a blind. The electrodes 14,
Even if the polarity of the voltage applied to 14 ′ is reversed, the electrophoretic particles 12 are only attracted to the observer-side electrode 14, so that the light source is also blocked and becomes a blind.

Next, as shown in FIG. 1, the opposing electrodes 14 and 14 'are divided into a plurality of parts, and voltages having different polarities are alternately applied. Now, it is assumed that the black-colored portions are applied to the electrodes 14 and 14 'and the negative voltage is applied to the portions indicated by the grain pattern. Then, the electrophoretic particles 12 are attracted to the positive electrode. In this way, on the observer's side, the light source diffracts between the electrodes 14 and 14 'and passes through, and the light source can be taken in. In this way, the electrophoretic phenomenon can be used as a blind. Since electrophoresis has a memory function, the electrophoretic particles remain attracted to the electrodes for a long time even when the power is turned off, so it is not necessary to apply a voltage continuously, and at least the operation of transmitting and blocking light is performed. The voltage may be applied to the electrodes only at this time.

In order to function as a blind, it is necessary to prevent the passage of the light source so as not to obstruct the passage of the light source.
4'is also made of transparent SnO ₂ , In ₂ O ₅ or the like. Then, the dispersion medium 11 uses a transparent or near transparent pale color. On the other hand, for the electrophoretic particles 12, a dark color is selected in order to enhance the blocking effect of the light source.

<Effects of the Present Invention> The present invention utilizes an electrophoretic phenomenon as a blind, and a voltage can be adjusted by alternately applying voltages having different polarities to both electrodes facing each other to form a blind. It was In addition, compared to the conventional mechanical blind, it is possible to adjust the light quantity by selecting the voltage application, and if the blocking area and the passing area can be switched, the blind can be partially performed. Fine dimming is possible. Further, since it uses the electrophoretic phenomenon, it is easy to make the device thinner. Further, since the electrophoresis has a memory function, the electrophoretic particles remain attracted to the electrodes even when the power is turned off, which is economically advantageous because it is not necessary to continuously apply the power.

[Brief description of drawings]

 FIG. 1 is a sectional view of the blind of the present invention. 10 …… Dispersion system 11 …… Dispersion medium 12 …… Electrophoretic particles 13,13 ′ …… Substrate 14,14 ′ …… Electrode 100 …… Blind

Claims (2)

[Claims] 1. In a blind using an electrophoretic phenomenon obtained by sandwiching a dispersion system having a dispersion medium and electrophoretic particles with both electrodes, in order to adjust the transmitted light,
An electrophoretic phenomenon is characterized in that a voltage is externally applied to both electrodes when the electrophoretic particles are attracted to one of the electrodes to block or transmit light. There was a blind. 2. The blind using the electrophoretic phenomenon according to claim 1, wherein the electrodes, the substrates, and the dispersion medium are transparent materials.