The present invention is directed to a braille display device in which braille pins are selectively protruded using an electrorheological fluid phenomenon.
The present invention is also directed to a method for manufacturing a braille display device in which braille pins are selectively protruded using an electrorheological fluid phenomenon.
An aspect of the present invention provides a braille display device using an electrorheological fluid, comprising: a base body in which a plurality of insulating reception grooves are formed; a first electrode arranged below the base body; an electrorheological fluid received in the reception groove; a microcapsule having an electrophoresis particle which is dispersed in the electrorheological fluid; a second electrode arranged above the microcapsule; a braille pin installed above the second electrode; and a braille pin protection film arranged above the braille pin.
The braille display device may further comprise an upper body which is formed above the base body and has a reception groove which communicates with the insulating reception groove formed in the base body. The first and second electrodes may be disposed in a pixel form on areas corresponding to the reception grooves. The braille display device may further comprise a first electrode protection film which is formed between the first electrode and the insulating reception groove to protect the first electrode, and a second electrode protection film which is formed between the second electrode and the insulating reception groove to protect the second electrode. The electrophoresis particle and a dielectric fluid may be included in the microcapsule together. The electrophoresis particle and the dielectric fluid may be made of materials having the same specific gravity.