JPH0713125A - Display device - Google Patents

Abstract

PURPOSE:To make it possible to make plural displays on the same display surface by a relatively simple method by inscribing graphics or characters on the transparent conductive film of a high polymer dispersed liquid crystal device and electrically insulating these graphics or characters and other parts so that voltage can be separately impressed thereto. CONSTITUTION:For example, a character as shown by numeral 6 in it Fig (the first letter of Japanese syllabary) is inscribed on the conductive film 3 deposited on a film 1. The character 6 is insulated from the circumference and its extension part is connected to an electrode 7. This electrode 7 is connected to one terminal 9 of an AC power source 20 by a wiring 8. The circumferential part of the character 6 is connected through an electrode 10, a wiring 11 and a switch 12 to the other terminal 13 of the AC power source 20. Similarly, the conductive film 4 on the opposite side is connected through an electrode 14 and a wiring 15 to the terminal 9 connected with the character 6 of the AC power source 20. Then, the voltage is impressed only between the circumferential part of the character 6 and the conductive film 4 opposite thereof and this part becomes transparent when a switch 12 is closes. The character 6 remains as it is and the character 6 is displayed.

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display device such as a guide board or an advertising board for displaying relatively fixed figures or characters. [0002] [Prior Art] Conventionally, a display device of this type is specified by mechanically rotating a display plate on which a plurality of figures or characters are written or by blinking the illumination of the display plates arranged in parallel. The figure or character of was displayed. [0003] [Problems to be Solved by the Invention] As described above, in the related art, the display plates are mechanically rotated or arranged in parallel, so that the device becomes large and there are many failures and power consumption is high. Many were expensive. [Means for Solving the Problems] According to the present invention, at least one transparent conductive film of a polymer-dispersed liquid crystal device is engraved with a figure or a character, and the figure or the character portion and other portions are electrically connected. It is insulated so that voltages can be applied separately. Furthermore, if necessary, a plurality of film systems having the same structure are stacked. [Operation] In the above-described structure, if a voltage is applied between the conductive film facing a figure or character portion on a specific conductive film,
Only that part becomes transparent, and engraved figures or characters appear and are displayed. The pattern or character on the conductive film which is not displayed is electrically short-circuited with other portions. [Embodiment] Next, an embodiment of the present invention will be described with reference to the drawings. [0007] FIG. 1 is an exploded perspective view of an embodiment of the display device of the present invention. [0008] In the figure, 1 and 2 are transparent resin films or glass plates, and conductive films 3 are provided on the main surfaces facing each other.
And 4 are applied. Between films 1 and 2
A liquid crystal film 5 in which a liquid crystal is dispersed is sandwiched between porous resin or rubber films. As shown in the figure, the letter a 6 is engraved on the conductive film 3 adhered to the film 1. The character a6 is insulated from the surroundings, and its extension is connected to the electrode 7, and the electrode 7 is further connected by the wiring 8.
It is connected to one terminal 9 of the AC power supply 20. Letter a 6
The peripheral portion of is connected to another terminal 13 of the AC power source via the electrode 10, the wiring 11 and the switch 12. Similarly, the conductive film 4 on the opposite side is connected to the terminal 9 to which the letter a 6 of the AC power source 20 is connected via the electrode 14 and the wiring 15. [0009] Therefore, when the switch 12 is closed, the character a
A voltage is applied only between the conductive film 4 and the peripheral portion facing the surrounding portion, the portion becomes transparent, the character a 6 remains opaque, and the character a is displayed. If the voltage is applied in the opposite way, the transparent and opaque areas will be opposite. [0010] In addition, as shown in FIG. 2, in a similar manner, the character b 16 is engraved on the conductive film 4, connected to the power source 20 through the electrode 17, the wire 18 and the switch 19, and the switch 12 is closed to display the character a. When the switch 19 is closed, the letter B is displayed. Further, by stacking two layers of film system as shown in FIG. 2, a maximum of four types of figures or sentences can be displayed. Further, a multilayer structure is possible by slightly sacrificing display clarity. [0011] [Effect of the invention] As described above, according to the present invention,
It is possible to display a plurality of images on the same display surface by a relatively simple method.

BRIEF DESCRIPTION OF THE DRAWINGS [FIG. 1] FIG. 1 is a schematic exploded perspective view of an embodiment of a display device according to the present invention in which a figure or a character is engraved only on one transparent conductive film. FIG. 2 is a schematic exploded perspective view showing an embodiment in which two different transparent conductive films are engraved with different figures or characters. [Explanation of reference numerals] 1, 2 transparent resin film or glass plate 3, 4 transparent conductive film 5 liquid crystal film in which liquid crystal is dispersed in porous resin or rubber film 6, 16 characters 7, 10, 14, 17 electrodes 8, 11,15,18 Wiring 9,13 Power supply terminal 12,19 Switch 20 Power supply

Claims (1)

What is claimed is: [Claim 1] A transparent conductive film is deposited on one main surface thereof.
In a polymer-dispersed liquid crystal device, which comprises a transparent resin film or glass plates arranged so that the conductive films face each other, and a film in which a liquid crystal liquid is dispersed in a porous resin or a rubber-like substance is sandwiched therebetween. A display device characterized by engraving a unique figure or character on at least one of the conductive films and displaying a unique figure or character by applying a voltage. [Claim 2] A display device, wherein a plurality of figures or characters are individually displayed by stacking at least two layers of the structure of claim 1.