JPH0553509A - Display device - Google Patents

Abstract

PURPOSE:To easily couple plural display parts by pressing electrode members by a pressing member consisting of a soft part and a rigid part, thereby assuring an electrical bond. CONSTITUTION:Plural planar EL elements 21 having electrodes 20 on the main planes are juxtaposed and are disposed adjacent to each other in such a manner that, for example, the two EL elements 21 are disposed adjacent each other and directed upward and the corresponding electrodes 20 of the adjacent EL elements 21 are aligned. A film member 23 having metallic wirings 22 on its main plane is so disposed on the adjacent E1 elements 21 that its metallic wirings 22 are bridged between the corresponding electrodes 20. The pressing member 24 is pressed from the rear surface of the film member 23 and is brought into pressurized contact therewith. The pressing member 24 consists of the soft part 25 having an insulating characteristic and resilience and the rigid part 26 holding this part. The rigid part 26 and the EL elements 21 are crimped by a frame body and press the metallic wirings 22 to the corresponding electrodes 20 by maintaining the elastic recovery force of the soft part 25, by which the electrical coupling between the adjacent electrodes is attained.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a display device, and more particularly to a display device having a flat display surface and an electrode array on its back surface.

[0002]

BACKGROUND ART Conventionally, so-called cathode ray tubes and CRTs have been widely known as display devices. Since CRTs are bulky, plasma display panels (Plasma Displ
ay Panel (PDP) and electroluminescence (Elect)
An oro-Luminescence (EL) display device has been developed.
These flat-panel display devices are light-emitting devices, and the PDP has 2
The EL display device utilizes the emission of plasma accompanied by high-pressure discharge of neon gas or the like enclosed in a plurality of fine cells sandwiched between sheets of glass, and an EL display device is a semiconductor thin film such as CdS or an organic compound such as an organic dye. An electric field is applied to a thin film by a plurality of fine electrodes to emit light.

For example, as a display unit of an EL display device,
As shown in FIG. 3, a plurality of transparent electrodes 2 (anode) such as ITO (indium tin oxide), a hole transport layer 3, an organic EL layer 4, and a transparent electrode 2 are crossed at right angles on a glass transparent substrate 1. Stacking a plurality of back electrodes 5 (cathodes) in order,
There is the formed XY matrix type organic EL element 10. The organic EL element has a two-layer structure composed of the hole transport layer 3 and the organic EL layer 4 shown in the drawing, and a three-layer structure in which an organic electron transport layer (not shown) is further arranged between the organic EL layer 4 and the cathode 5. Structured ones are also known. The organic EL layer 4 sandwiched between the pair of the anode 2 and the cathode 5 shown in the figure emits light when a DC voltage is applied from the anode 2 and the cathode 5.

Further, in the light-receiving display device, an electric field is applied to the liquid crystal layer to change the alignment direction of the liquid crystal molecules, so that the birefringence of the liquid crystal layer changes with respect to light incident in a certain polarization direction. Liquid crystal display (Liquid
Crystal Display (LCD) is known. The display section of the LCD modulates the transmitted light and requires a separate light source.

For example, there is a simple matrisk type liquid crystal element shown in FIG. 4 in the display section of the LCD. Such a liquid crystal element,
The liquid crystal layer 1 is provided between the alignment films 13 on the inner side surfaces of the pair of transparent substrates 12.
4 is held via a spacer 15. A transparent electrode 16 is arranged between each substrate 12 and the alignment film 13,
An electric field can be applied to the liquid crystal layer 14 while the transparent electrodes 16 intersect at right angles with each other.
On both outer sides of the substrate 12, a pair of polarizing plates 17 set in crossed Nicols are arranged.

In the case of a display device in which a large screen is formed by assembling display elements having electrodes on the light emitting surface or the light transmitting surface or on the back surface thereof (hereinafter, simply referred to as a main plane), conventionally, the display unit alone is used. The plurality was connected to each other by a connector. Further, when the connector is not used, it is difficult to connect the display unit alone due to a step or the like.

[0007]

SUMMARY OF THE INVENTION The present invention has been made to eliminate the above-mentioned drawbacks of conventional display devices, and an object of the present invention is to provide a display device in which a plurality of display portions can be easily connected.

[0008]

The display device of the present invention comprises a plurality of plate-shaped display elements each of which is arranged in parallel and has an electrode on the main plane, and the electrodes of the adjacent display elements are coupled to each other to apply electric power. In the display device in which the display element is driven by, a film member on which a metal wiring is formed, a flexible portion that presses the film member to the electrode of the display element, and a pressing portion that holds the flexible portion are pressed. And a member.

[0009]

With the above construction, even if there is a step between adjacent display portions, they can be coupled while maintaining electrical coupling with each other.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a part of the display device of this embodiment. The display device is configured by arranging a plurality of plate-shaped EL elements 21 each having the electrode 20 on the main plane. For example, two EL elements are adjacent to each other so as to face upward, and the corresponding electrodes of the adjacent EL elements are aligned. Next, the film member 23 having the metal wiring 22 on the main plane is arranged on the adjacent EL element so that the metal wiring 22 bridges between the corresponding electrodes 20. Next, the pressing member 24 is pressed from the back surface of the film member 23 and pressed against it. The pressing member 24 includes a flexible portion 25 having insulating properties and flexibility and a rigid portion 26 holding the flexible portion 25. For the flexible portion 25, ethylene propylene rubber or the like is used. The rigid portion 26 and the EL element 21 are held by a frame (not shown), the elastic restoring force of the flexible portion 25 is maintained, and the metal wiring 22 is pressed against the corresponding electrode 20, thereby electrically connecting the adjacent electrodes. Coupling is achieved. As shown in FIG. 2, the metal wiring 22 bridges the pair of electrodes 20 to couple the plurality of EL elements 21 in a plane. The display device is
It is driven by being supplied with electric power from the electrodes of the EL element coupled to the periphery.

In the display device of this embodiment, the EL element has been described. However, if it is a light emitting element having an electrode array on the main plane, it can have the same coupling structure as described above and is a light receiving type liquid crystal element. However, the same effect can be obtained.

[0012]

As described above, according to the present invention, a film-like electrode member parallel to the electrode of the display element is bridged to the joint portion of the adjacent display portions, and the electrode member is separated from the flexible portion and the rigid portion. Even if there is a step at the joint, the step can be absorbed by the flexible portion, because the pressing member is pressed to secure the electrical coupling.

[Brief description of drawings]

FIG. 1 is an exploded view showing an embodiment of the present invention.

FIG. 2 is an enlarged partial sectional view of an embodiment of the present invention.

FIG. 3 is an enlarged partial cutaway perspective view of an EL element.

FIG. 4 is an enlarged partial cutaway perspective view of a liquid crystal element.

[Explanation of symbols]

 20 ... Electrode 21 ... EL element 22 ... Metal wiring 23 ... Film member 24 ... Pressing member 25 ... Flexible part 26 ... Rigid part

Claims (1)

[Claims] 1. A display element comprising a plurality of plate-shaped display elements each of which is arranged in parallel and has an electrode on a main plane, and the display element is driven by connecting electrodes of the adjacent display elements and applying electric power. A display device according to claim 1, further comprising a film member on which metal wiring is formed, and a pressing member including a flexible portion that presses the film member against the electrode of the display element and a rigid portion that holds the flexible portion. And display device.