JP2001337633A - Display unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a display unit which utilizes EL elements formed by electrodes which have been formed by printed circuits. SOLUTION: The present invention is a display unit 7 of a fan showing a firework by a light emitting layer 3 on a pair of an electrode 2 (2 and 3 are shown in Fig. 1) at each of light emitting sections 1713-1716, 18 formed on a printed circuit board. It consists of the fan 8 and a handle 9, and, by a controller (not shown in a figure), emits a light from the light emitting sections 1713-1716 consisting of three groups 13-16 and a light of the light emitting section 18 simultaneously or with a predetermined time difference, displaying a skyrocket.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display device, and more particularly, to a display device using a light-emitting panel using flexible electroluminescence.

[0002]

2. Description of the Related Art Electroluminescent (hereinafter, EL) light emitting devices using a phosphor such as a rare earth metal are used as a light source for a backlight of a liquid crystal panel.

[0003]

By the way, the above-mentioned EL element has a transparent electrode layer, a light-emitting layer, a dielectric layer, a back electrode layer, a protective layer, and a transparent support such as a glass or polyester film forming a surface side layer. The layer (resist layer) is formed by coating by silk printing or other means (in practice, each layer is often coated multiple times), so the structure is complicated, and indium tin oxide as a light-transmitting dielectric is expensive. Deterioration is likely to occur, and it is difficult to reduce the size because the EL light emitting element and the control circuit board are separate.

On the other hand, utility model registration No. 3066629
The EL element of the invention described in Japanese Patent Application Laid-Open No. H10-15095 discloses a method of printing a pair of electrodes and an electric circuit on a base such as a printed wiring board, forming a dielectric layer on at least one polarity electrode thereon, A light emitting layer and a transparent sealing layer are formed thereon. The EL device according to the present invention is inexpensive, can be easily miniaturized including a power supply circuit, and can improve the moisture resistance to achieve a long life.

The pair of electrodes has a comb-shaped electrode in which an electrode of the opposite polarity is inserted between a plurality of electrodes of the same polarity, and two electrodes in parallel so that adjacent electrodes always have the opposite polarity. A spiral-shaped electrode or the like in which electrodes are arranged is shown, and as its application, it is possible to display numerals, characters, symbols, patterns, etc., in addition to a backlight light-emitting panel of a small display.

An object of the present invention is to provide a display device using the above-described EL element.

[0007]

According to a first aspect of the present invention, there is provided a display device comprising a plurality of light emitting portions and an electric circuit formed on a printed wiring board, wherein the light emitting portion comprises a pair of electrodes. A layer composed of a dielectric and a luminous body, and a transparent protective layer, and the electrodes are formed by printed wiring means in which electrodes of different polarities are densely arranged alternately on the entire surface of each of the light-emitting portions. The electric circuit includes a circuit formed by printed wiring means for supplying electricity to the electrodes. The transparent protective layer is formed so as to cover at least the entire surface of the light emitting layer and the electric circuit, and the plurality of electrodes are formed according to a preset program. Are provided with a control unit for energizing each.

The layer comprising the dielectric and the luminous body may be formed by forming a dielectric layer on an electrode and providing a luminous layer thereon, or by mixing a luminous body (rare earth metal) into the dielectric. It may be formed as a layer (one layer). As for the mixing ratio, it is preferable that the luminous body and the dielectric are mixed at a ratio of 100: 1 to 100: 50% by weight. Each of the layers can be formed by printing means such as silk printing.

Although there is no particular limitation on the width of the electrodes and the value of the electrode spacing having different polarities, it is preferable that
m or less, more preferably 80 μm or less, it is possible to obtain a high quality light emitting surface. As is apparent from the above description, since the electrodes have capacitive characteristics, it is preferable to drive the electrodes by using an alternating current. In addition, it is preferable that the driving unit for lighting the light emitting unit be a static drive rather than a dynamic drive.

The pair of electrodes is not particularly limited, except that electrodes of different polarities are densely arranged alternately. For example, the pair of electrodes are formed so that the teeth of a comb overlap each other. , An electrode of one polarity is arranged so as to be inserted between the electrodes of the other polarity, or two electrodes are arranged in a spiral in parallel so that adjacent electrodes always have opposite polarities. It can be.

[0011] The program can be driven by a microcomputer. At least a part of the plurality of light emitting portions is sequentially blinked and blinked at the same time, so that the movement of the light emitting body can be expressed. It can express flying fireflies, meteors, etc., and provide excellent display effects.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to an embodiment with reference to the accompanying drawings.

The light-emitting panel of this embodiment has a pair of electrodes 2-1 and 2-2 printed and wired on a flexible printed wiring board 1 (hereinafter simply referred to as electrode 2 when collectively referred to without regard to polarity). The light emitting layer 3 is provided to cover the light emitting portion 5 covered with a protective layer 4 made of a transparent resin.
The light emitting layer 3 was obtained by mixing 1 to 50 parts by weight of a rare earth metal as a light emitting body with respect to 100 parts by weight of a dielectric. In addition, the lead gland 6-1 by the printed wiring shown in FIG.
6-2 is for connecting the electrodes 2-1 and 2-2 to the power source E.

As shown in FIG. 2, the electrodes 2-1 and 2-2 each have a comb-like shape in which one end of each of the plurality of electrodes is integrated with each other.
The electrode 2-1 (2-2) is connected to the electrode 2-2 on the other side in parallel with each other.
It is printed so as to be placed between (2-1).
Although the electrode 2 (determining the shape of the light-emitting layer 3) in FIG. 2 has a rectangular shape, the shape of the light-emitting portion may be a circle, a triangle, or any other shape other than the rectangle, a point or a surface, depending on the design of the light-emitting portion.
Therefore, the length of each of the electrodes 2-1 and 2-2 is usually not constant depending on the location.

Since the electrode 2 is formed as described above, when the electrode 2 is connected to the power source E, a predetermined amount of light is applied to the light emitting layer 3 disposed between the adjacent electrodes 2-1 and 2-2. An electric field acts to emit light with a color corresponding to the rare earth metal used for the light emitting layer and a luminance according to the rare earth metal concentration. The electrode 2 in the present embodiment was operated at a maximum frequency of 7000 Hz and a maximum applied voltage of 400 V.

The transparent protective layer has properties as a protective material (resist) used in ordinary electronic devices, that is, an insulating property.
There is no particular limitation except that performances such as water resistance, air resistance, and chemical stability are required.

The light emitting section of the present invention has a feature that the light emitting section can be formed on a flexible printed wiring board because the light emitting section can be formed extremely thin.

Next, the display device 7 according to the embodiment of the present invention shown in FIG. 3 will be described. That is, the display device 7 is a fan drawn with fireworks, and is composed of a fan portion 8 and a handle 9. The fan portion 8 is a frame made of spring steel or the like around the flexible printed wiring board 1 cut into a fan shape. The structure is reinforced by the part 10 and the root part is held by the handle 9. The handle 9 is made of two pieces of plastic, and houses therein a control unit composed of a microcomputer and a power supply battery (both not shown). Reference numeral 11 shown in FIG. 3 is a power switch, and 12 is a battery storage cap.

In the fan section 8, launch fireworks 13, 14, 15 and 16 as shown in FIG. 3 are drawn, and respective light emitting portions 17 ₁₃ , 17 ₁₄ , 17 ₁₅ and 17 ₁₆ and light beams are formed. The light emitting section 18 is composed of the electrode 2, the light emitting layer 3 and the protective layer 4 shown in FIGS. 1 and 2, and a large number of printed wirings of each light emitting section 17 ₁₃ , 17 ₁₄ , 17 ₁₅ and 17 ₁₆ (FIG. 1). 2, 6-1 and 6-2)
The light emitting units 17 which are controlled in the same manner are formed so as to reach the light emitting units 17 one by one while being pulled out from the control unit by one printed wiring and branching.

Therefore, the light emitting units 17 connected to the wiring drawn as one printed wiring from the control unit emit light all at once, and the light emitting units 17 belonging to different printed wirings when pulled out from the control unit are: Each emits light independently. In addition, light can be emitted in various modes, such as causing the outer light emitting portion 17 and the inner light emitting portion 17 to emit light of different colors, or causing the middle light to emit first with a slight time difference.

Further, the light emitting portion 17 ₁₅ composed of three groups may light emission of each group were simultaneously performed, also also be emitted in slightly different times, also after the light streak-like light emitting portion 18 emits light It can also be the light emitting portion 17 _15. In addition, light emission can be produced by a number of control modes, such as by allowing the time difference and the light emission order of the light emitting units 17 ₁₃ , 17 ₁₄ , 17 ₁₅ and 17 ₁₆ to be determined by random numbers. Therefore, a high expression effect can be obtained.

In another embodiment, for example, a large number of light-emitting portions that emit light like fireflies are arranged on a wall-mounted light-emitting panel depicting a night view of a riverside, for example, a state in which fireflies fly or a leaf stops blinking. It is possible to pre-program the appearance, blinking at the same time, etc., and form a light emitting part representing a star in the night sky and a light emitting part arranged in a continuous line where light runs linearly, so that the blinking star and the meteor are expressed Can effectively express various application scenes, souvenirs such as amusement parks,
It can be effectively applied to advertising media, signboards, halls and other interior decorations.

Further, for example, in a show room of an automobile, a display designed using a transparent flexible printed wiring board on a glass window facing the street and displaying the name of the exhibition car or the name of a manufacturer by a light emitting section is attached, and a neon sign is used. You can make it blink like. If the various displays described above are implemented using a color liquid crystal display or a plasma display, the cost becomes extremely high. However, according to the display of the present invention, a display that is relatively inexpensive and effective for decoration, advertising, and the like can be realized.

[0024]

As described above, in the display device of the present invention, since the shape of the electrode forming the light emitting portion can be formed by the printed wiring, a more effective design can be made much cheaper and more expensive than the conventional display. It can be easily performed, and the application range can be further expanded by using a flexible printed wiring board.

[Brief description of the drawings]

FIG. 1 is a partial cross-sectional view of a light emitting panel according to an embodiment of the present invention.

FIG. 2 is a partial perspective view showing a part of a printed circuit board in a cutaway manner for explaining a configuration of an electrode part of FIG. 1;

FIG. 3 is a plan view of the display device according to the embodiment of the present invention, indicated by a fan.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Printed wiring board 2 Electrode 2-1 Electrode 2-2 Electrode 3 Light emitting layer 4 Protective layer 5 Light emitting part 6-1 Lead gland 6-2 Lead gland

Continued on front page F term (reference) 3K007 AB17 AB18 BA07 BB02 BB07 CA06 CB02 CC04 DA04 DA05 DC04 EA01 GA04 5C096 AA11 AA27 BA04 BB27 BB39 BC02 BC15 BC20 CA06 CA29 CB07 CC07 CC23 CC27 CC29 CC30 DC02 DC04 DC30 DD04 FA04 FA05

Claims (5)

[Claims] A plurality of light-emitting portions and an electric circuit formed on a printed wiring board, wherein the light-emitting portion is formed by a pair of electrodes, a layer including a dielectric and a light-emitting body, and a transparent protective layer; The electrodes are formed by printed wiring means on which electrodes of different polarities are densely arranged alternately on the entire surface of each of the light emitting units, and the electric circuit is formed by a circuit formed by printed wiring means for supplying electricity to the electrodes. A display device, wherein the transparent protective layer is formed so as to cover at least the entire surface of the light emitting layer and the electric circuit, and a control unit is provided for supplying a current to each of the plurality of electrodes according to a preset program. 2. The display device according to claim 1, wherein the layer composed of the dielectric and the luminous body is a mixed layer in which the luminous body is mixed with the dielectric. 3. An electrode having a width and an electrode interval of 1 each.
The display device according to claim 1, wherein the thickness of the display device is equal to or less than 00 μm. 4. The program according to claim 1, wherein the program causes at least a part of the plurality of light emitting parts to blink sequentially and simultaneously to blink, thereby expressing a movement on the light emitting body. Display device. 5. The display device according to claim 4, wherein the movement of the luminous body represents a fireworks display.