JPH0576154B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to electroluminescence that emits light by applying an alternating current voltage between a pair of electrodes that sandwich an electroluminescent layer.

(Prior Art) Conventionally, electroluminescence has been utilized as a surface light emitting device, and when emitting light, a switch such as a transparent type provided in a power supply section or in front of the electroluminescence was operated.

(Problems to be Solved by the Invention) Since the above-mentioned conventional electroluminescence is a surface emitting device, if a patterned light emitting region is required, masking is required on the surface of a transparent support that is often touched by people's hands. It was necessary to apply shadow processing. As a result, the boundaries of the patterned light-emitting area may become unclear due to scratches or dirt on the masking shadow applied to the surface of the transparent support.
Light often leaked due to deterioration of the masking shadow processing area. Furthermore, when masking, the electroluminescence was treated as a single plate, and the situation behind it could not be confirmed. On the other hand, the light emitting operation of the light emitting element is left to the switching operation of the power supply section, etc., and the range of application is also limited from the design point of view.

The present invention solves these drawbacks by using a conductive paste of a predetermined shape laminated on the electroluminescent layer, and in addition to being able to select the light emitting area of the electroluminescent layer without masking shadow processing, it also has a switch function. The purpose is to provide electroluminescence with a built-in.

(Means for Solving the Problems) In order to achieve the above object, in the present invention, the patterned light emitting region of an electroluminescent body is formed by laminating a conductive paste on the electroluminescent body in a predetermined shape, and forming a patterned light emitting region of an electroluminescent body by laminating a conductive paste in a predetermined shape from a conductive sheet. This is determined by establishing continuity between the conductive sheet and the conductive paste, and also allows the conductive sheet and the conductive paste to be brought into contact with each other and separated from each other.

That is, a first transparent conductive layer 2 formed on one side of a transparent support 1 made of plastic film or the like.
, an electroluminescent material 3 made of zinc sulfide or the like deposited on the first transparent conductive layer 2, and a first conductive material laminated in an arbitrary shape on the electroluminescent material 3 by screen printing or the like. The paste 4, a conductive sheet provided to be pressed against the first conductive paste 4, and an insulating material such as silicone rubber so as to elastically separate the first transparent conductive layer 2 and the conductive sheet. or
By disposing an elastic material 10 made of UV (ultra violet) ink or the like around the first conductive paste 4, the space between the first transparent conductive layer 2 and the conductive sheet becomes transparent to the transparent support 1. The electroluminescent body 3 is constructed so as to be brought into contact and separated in accordance with the pressing force, and to turn on and off an alternating current voltage to the electroluminescent body 3 so as to blink.

(Function) The electroluminescent body 3 used in the electroluminescence of the present invention is formed between a pair of electrodes consisting of a first transparent conductive layer 2 and a second transparent conductive layer 7 formed on the upper surface of the back support 6. By applying an alternating current voltage to the electrode, excitation and recombination with electrons are repeated and light is emitted. The first conductive paste 4, which is uniformly laminated on the electroluminescent body 3, is adhered to a conductive sheet that becomes one electrode, but even if it is not uniformly adhered, the first conductive paste 4 Since the paste 4 is a good conductor, it has a uniform potential, and the light emitting part 20 of the electroluminescent body 3 emits light uniformly in the shape of the conductive paste 4. Naturally, the portion where the first conductive paste 4 is not laminated does not emit light even if the electroluminescent body 3 is present. Further, the first conductive paste 4 and the conductive sheet are elastically separated by an insulating elastic material 10, and by applying a pressing force from the surface of the transparent support 1, the first conductive paste 4 and the conductive sheet are separated from each other. By pressing the conductive paste 4 and the conductive sheet or the second conductive paste 9 laminated on the conductive sheet, the electroluminescent body 3 can emit light.

(Example) The details of the present invention will be explained below based on the drawings. FIGS. 1a and 1b are explanatory diagrams of an embodiment of electroluminescence according to the present invention. Further, FIG. 1a shows a plan view, and FIG. 1b shows a side sectional view.

Reference numeral 10 denotes an insulating elastic material made of silicone rubber, UV-based ink, etc., which is attached to the first conductive paste 4 and the second conductive paste 9 around the light emitting part 20 in order to separate the first conductive paste 4 and the second conductive paste 9. It is held between a conductive sheet consisting of a transparent conductive layer 2 and a conductive foil 5 or a second transparent conductive layer 7. Conductive foil 5, second
A transparent conductive layer 7 is provided on the upper surface of a back support 6 made of a plastic plate, a glass plate, or the like. Therefore, by applying a pressing force from the surface of the transparent support 1 and compressing the insulating elastic material 10, the first conductive paste 4 and the second conductive paste laminated on the conductive sheet are
conductive paste 9 is electrically contacted. The AC voltage is applied between the first transparent conductive layer 2 and the conductive sheet, and the first conductive paste 4 and
An alternating current voltage is applied to the electroluminescent body 3 through contact with the second conductive paste 9 laminated on the conductive sheet, and the electroluminescent body 3 emits light. As shown in FIG. 1a, the electroluminescent body 3 is seen as a light emitting part 20 from the surface through a light transmitting part 22 consisting of the transparent support 1 and the first transparent conductive layer 2.

Although the second conductive paste 9 is laminated on the conductive sheet in FIG. 1b, the first conductive paste 4 is directly attached to and separated from the conductive sheet to provide a switch function. That's good too. Further, the first conductive paste 4 and the conductive sheet may be used by printing, coating, or other etching treatment after lamination without any problem.

(Effects of the Invention) According to the present invention, by laminating the first conductive paste 4 on the lower surface of the electroluminescent body 3, the first conductive paste 4 is laminated. An alternating current voltage is applied to the electroluminescent body 3 corresponding to the shape of the electroluminescent body 3, which emits light.The boundary of the patterned light emitting area may become unclear due to external dirt or scratches, or the light may not be visible due to poor masking seed processing, etc. If it leaks, the problem will disappear.

In addition, by removing unnecessary electroluminescent bodies 3, not only can various designs be made possible by changing the color of the back support 6, but also by making the back support 6 transparent, it is possible to create an independent design using only the electroluminescent body 3. This has the effect of making it possible to create more diverse designs, such as by making the pattern on the back of the back support 6 replaceable. Furthermore, by attaching and separating the first conductive paste 4 to and from a conductive sheet serving as a power source, there is an effect that a switchable device can be incorporated.

[Brief explanation of the drawing]

The drawings show embodiments of the present invention, and FIG. 1 shows an embodiment of an electroluminescent device with a built-in switch. 1... Transparent support, 2... First transparent conductive layer,
3... Electroluminescent body, 4... First conductive paste, 5... Conductive foil, 6... Back support, 7... Second transparent conductive layer, 9... Second conductive paste,
10... Insulating elastic material, 20... Light emitting part, 22
...Light transmitting part.

Claims (1)

[Claims] 1 A first transparent conductive layer formed on one side of a transparent support made of plastic film or the like;
an electroluminescent material formed of zinc sulfide or the like deposited on a transparent conductive layer; a first conductive paste laminated in an arbitrary shape by screen printing or the like on the electroluminescent material; A conductive sheet provided to be pressed into contact with the conductive paste, and an insulating elastic material such as silicone rubber or UV rays are used to elastically separate the first transparent conductive layer and the conductive sheet. An elastic material made of a base ink or the like is disposed around the first conductive paste, and the first transparent conductive layer and the conductive sheet are brought into contact with and separated from each other according to the pressing force against the transparent support, thereby forming an electroluminescent material. Electroluminescence is characterized by blinking when an alternating current voltage is turned on and off.