KR100912724B1 - Completely flexible display based on structure of textiles and electronic divice using the flexible display - Google Patents

Abstract

The present invention provides a fully flexible woven flexible display device having a structure of a fibrous structure and an electronic device including the same, comprising: a) a plurality of strands of electric circuit lines that serve to supply current or electric signals and are spaced at regular intervals; b) a plurality of strands of light emitting device lines which emit light by electric current or electric signals received from the outside and are spaced at regular intervals; And c) a power supply device for supplying power and electrical signals to the electric circuit lines and the light emitting element lines, wherein the electric circuit lines and the light emitting element lines are inclined on one side and are fabricated on the other side of the weft. The device includes a woven flexible display device that is connected to emit light at a tissue point where the electric circuit lines and the light emitting device lines meet.

Fully flexible display, flexible display, flexible display, woven flexible display, textile flexible display, electronic fiber

Description

[Completely flexible display based on structure of textiles and electronic divice using the flexible display}

The present invention relates to a fully flexible woven flexible display device based on a fibrous tissue structure, and more particularly, an electric circuit line for supplying current and an electronic signal to the thread strand constituting the fibrous tissue and electricity received from the outside. The present invention relates to a woven flexible display device that is composed of light emitting device lines that emit light by a signal and utilizes flexibility of a fiber structure.

Conventional technologies for implementing a flexible display include a liquid crystal display (LCD), an organic light-emitting diode (OLED) using an organic light emitting material, and an electronic paper (Electronic papar) in the same manner as a flat panel display. It is broken down into research and development. Among them, OLED is a self-luminous display device, which has an excellent viewing angle and contrast ratio, has low power consumption, fast response speed, and can be manufactured on a single substrate, which makes it easy to make a flexible device.

However, all of these flexible displays are flexible plastic substrates instead of conventional glass substrates, or thin films of circuits and light emitting materials coated on thin metal substrates. If the device is bent more than a certain time, it is limited due to the mechanical limitations of the thin films. It offers flexibility and there is a limit to the implementation of a fully flexible video interface. The limited flexibility of such displays detracts from the portability and wearability of electronic devices including the displays, thereby limiting the information provided anytime and anywhere.

Another conventional technique is to manufacture a roll-type keyboard made of fiber material from Eleksen, UK, as a fiber input device, and the School of Polymer, Textile & Fiber Engineerinng of Georgia Institute of Technology The company has a smart R & D achievement in its smart shirts that can realize biosignal monitoring and information processing using optical and conductive fibers. Based on the results of this research, the unique characteristics of clothing by specializing in military and military information that can remotely monitor the location of gunshot wounds in combat, as well as civil medical and personal information processing processing such as vital signal monitoring such as heart rate and body temperature While weaving, weaving technology has been developed to create clothing that can function as a real wearable computer platform. Infineon Technologies in Germany succeeded in embedding computer chips in fiber for the first time in the world in 2002. DuPont, USA, developed an electronic cloth that can transmit electric signals. It is possible to make possible clothing processors, connectors, and the like. However, the development of a fully flexible woven flexible display using fiber tissues has not been reported yet, and there is a long way to commercialization due to the poor performance of electronic circuits.

The present invention has been made to solve the above problems, the object is to overcome the limited flexibility of the conventional flexible LCD, OLED, E-paper, and a novel concept of a fully flexible woven flexible display having a fiber structure structure and the same To provide an electronic device.

In order to achieve the above object, the present invention is a fully flexible woven flexible display device having a structure of a fiber tissue and an electronic device comprising the same,

a) a plurality of strands of electrical circuits, spaced at regular intervals, serving to supply current or electrical signals;

b) a plurality of strands of light emitting device lines which emit light by electric current or electric signals received from the outside and are spaced at regular intervals; And

c) a power supply for supplying power and an electrical signal to the electric circuit lines and the light emitting element lines, wherein the electric circuit lines and the light emitting element lines are organized with one inclination and the other with a weft, and a power supply at both ends Is connected to include a woven flexible display device that emits light at a tissue point where the electric circuit lines and the light emitting device lines meet.

The electrical circuit line of the woven flexible display device according to the present invention is preferably a metal composed of a single metal element capable of transmitting a current or an electrical signal, an alloy in which two or more metal elements are mixed, an amorphous metal, an amorphous alloy, It may be selected from the group of conductive polymers, superelastic conductive fibers, carbon fibers, conductive inorganic materials and composites thereof.

Preferably, the light emitting device lines of the woven flexible display device according to the present invention may be sequentially stacked with a cathode, an electron injection layer, an electron transport layer, a light emitting layer, a hole transport layer, a hole injection layer, and an anode from the inside. In this case, when the electrons and holes are respectively injected from the cathode and the anode by the power source, they are transferred to the light emitting layer through the electron transport layer or the hole transport layer as needed, and the electrons and holes meet and recombine with each other in the light emitting layer. It is in the form of LED (Light Emitting Diode) device that emits light in red / green / blue or other visible light range depending on the electronic energy level.

The light emitting device lines of the woven flexible display device according to the present invention preferably have a structure in which they are mutually insulated by an insulating isolation wall which is formed in a regular manner along the axial direction without sharing a center cathode and other layers. It includes.

The light emitting device wire of the woven flexible display device according to the present invention is preferably a metal composed of a single metal element of an anode and a cathode, an alloy in which two or more metal elements are mixed, an amorphous metal, an amorphous alloy, a conductive polymer, a super Elastic conductive fibers, carbon fibers, conductive inorganics and composites thereof.

In this case, the anode of the light emitting device line may be preferably composed of a transparent material, and the electron injection layer, the electron transport layer, the light emitting layer, the hole transport layer, and the hole injection layer may be composed of an inorganic material, an organic material, or an organic-inorganic mixture.

In the woven flexible display device according to the present invention, the electric circuit lines of several strands and the light emitting element lines of several strands may be woven in the form of a woven fabric alternately with each other having an angle of more than 0 degrees and 90 degrees or less. . More preferably, one of the light emitting element lines and the electric circuit lines is inclined, and the other is formed in a substantially orthogonal form with the weft.

The woven flexible display device according to the present invention preferably includes a structure in which the electric circuit lines and the light emitting element lines are combined in the form of irregularities at the tissue points crossing each other.

Preferably, the woven flexible display device according to the present invention may include one or more separate reserve wires, which serve as insulation or signal transmission, between the two electric circuit lines and the light emitting device lines that are spaced apart at regular intervals. have.

Woven flexible display device according to the present invention is preferably a power supply for supplying electricity of direct current or alternating current; The power supply and the electric circuit line, and the power connection portion for connecting between the power supply and the light emitting circuit line may be configured.

The present invention also provides an electronic device including the woven flexible display device.

When the fabric-based device is manufactured as described above, a separate substrate is not required, and thus a fully flexible display device can be realized.

When the display device is configured by weaving the fiber tissue as in the present invention, since a separate substrate is not required, the flexible flexibility of the existing plastic substrate or the flexible display using the metal film can be overcome, and the flexibility of the fiber tissue itself can be achieved. Fully flexible woven flexible display device can be realized by utilizing the characteristics.

Therefore, the woven flexible display device having the full flexibility provided by the present invention and the electronic device including the same have a high elasticity material and are folded when carrying, so that they are easy to carry and can be easily worn and flat when used. It can be easily spread and receive information anytime, anywhere.

Hereinafter, the content of the present invention will be described in more detail with reference to the drawings.

1 is a schematic diagram of a fully flexible woven flexible display device based on a fibrous structure. The woven flexible display device provided by the present invention is characterized in that the light emitting element lines 10 and the electric signal lines 20 are woven alternately in a weft and an inclination, respectively, and emit light at their tissue points.

In this structure, one or more separate reserve lines 30 may be regularly included between all two electric circuit lines or light emitting element lines spaced at regular intervals. The reserve wire may serve as insulation or signal transmission, but is not necessarily limited thereto.

2 is a cross-sectional view of the electrical circuit line applied to the present invention. The electric circuit line is a metal composed of a single metal element capable of carrying current, an alloy containing two or more metal elements, an amorphous metal, an amorphous alloy, a conductive polymer, a superelastic conductive fiber, a carbon fiber, a conductive inorganic material, and a It may be composed of a material selected from a composite material, but is not necessarily limited thereto. In particular, the material of the electric circuit line is preferably composed of a transparent material.

3 is a cross-sectional view of the five-layered light emitting device line to be applied to the present invention. The light emitting element line is composed of a cathode 11, an electron injection layer 12, an electron transport layer 13, a light emitting layer 14, a hole transport layer 15, a hole injection layer 16, and an anode 17 from the inside. Some of them can be stacked sequentially, and take the form of electroluminescent elements that emit light by power supplied to the cathode and anode. The anode and cathode of the light emitting device wire are a metal composed of a single metal element, an alloy of two or more metal elements, an amorphous metal, an amorphous alloy, a conductive polymer, a superelastic conductive fiber, carbon fiber, a conductive inorganic material and a composite material thereof It may be composed of selected materials, but is not necessarily limited thereto. At this time, the anode of the light emitting device line is preferably composed of a transparent material, specific examples of such materials, (ITO (indium tin oxide), PEDOT (poly (3,4-ethylenedioxythiophene)), PEDOT- PSS (poly (3,4-ethylenedioxythiophene) -poly (styrenesulfonate))) etc. are mentioned.

The electron injection layer, the electron transport layer, the light emitting layer, the hole transport layer, and the hole injection layer may be composed of an inorganic material, an organic material, or an organic / inorganic mixture. Preferably, the inorganic material is a metal nano powder such as ZnS-based inorganic phosphor, Al, Cu, etc. Examples of the organic substance include PEDOT (poly (3,4-ethylenedioxythiophene), PEDOT-PSS [poly (3,4-ethylenedioxythiophene) -poly (styrenesulfonate)), NPB ( 4,4'-bis- (1-naphthyl-N-phenylamino) -biphenyl), BCP (2,9-dimethyl-4,7-diphenyl-1,10-phenanthroline), CBP (4,4'-N, N'-dicarbazolebiphenyl) and PVK (poly (N-vinylcarbazole)). Examples of the organic-inorganic mixture include Eu, Tb, Ir, Pt, and the like. Examples of dendrimers and low molecular weight materials having ions as central light emitting ions include Flrpic, Ir (ppy) 3, Ir (HFP) 3, PtOEP, and Alq 3. The electron injection layer, the electron transport layer, the light emitting layer, the hole transport layer, and the hole injection Each concrete constituting the layer The compositions are already known and may be used as they are.

The light emitting device lines 10 that can be used in the present invention can be manufactured through the following process.

In order to form a light emitting layer composed of an organic or organic-inorganic mixture on the wire-shaped negative electrode made of the above-described material, the organic or organic-inorganic mixture is dissolved in a solvent to have an appropriate viscosity, and then the negative electrode in the form of a wire is passed through the light-emitting solution thus formed. The surface may be coated with a light emitter. In order to further coat another layer, the previously coated layer may be sufficiently dried, and an electron transport layer, an electron injection layer, a hole transport layer, a hole injection layer, and an anode may be formed by a method similar to that described above. Such a coating method is a method of forming a light emitting device line that is most suitable from an economical point of view, and the present invention is not limited to the above method. In addition, sol-gel coating, spin coating, chemical thin film deposition such as CVD (chemical vapor deposition), physical thin film deposition such as PVD (Physical Vapor Deposition) or ALD (Atomic layer deposition) may be used.

In the woven flexible display device according to the present invention, a plurality of strands of electric circuit lines 20 and a plurality of strands of light emitting device lines 10 are alternately woven with alternating angles having an angle of more than 0 degrees and less than 90 degrees. It can be woven in form. Preferably, one of the light emitting element lines and the electric circuit lines is inclined, and the other is formed in a substantially orthogonal form with the weft. Preferably, the electrical circuit line and the light emitting device line include a structure that is combined in the form of irregularities at the tissue points crossing each other. For example, the electrical circuit line has a recessed structure, and the light emitting element lines have a convex structure, and then the convex portions of the light emitting element lines are joined to the recessed portions of the electrical circuit line, so that even when mechanical deformation is applied, crosstalk with adjacent light emitting element lines ( At the same time, it prevents cross talk and allows the electronic circuits to apply electrical signals and currents to specified locations without leaving the specified locations.

According to the type and driving method of the light emitting material, it may have various forms such as a single layer light emitting device line structure, a three layer light emitting device line structure, and a five layer light emitting device line structure. For example, FIG. 4 shows a three-layer structure composed of an electron transport layer 13, a light emitting layer 14, and a hole transport layer 15. As shown in FIG. FIG. 5 shows a single layer structure composed of the light emitting layer 14 between the cathode 11 and the anode 17.

6 is a side cross-sectional view of the five-layer light emitting device line according to the present invention. According to this, the light emitting element lines are separated by the separating walls 18 which are regularly formed along the axial direction while sharing the center cathode but not the other layers.

7 illustrates an overall structure diagram of a woven flexible display device according to the present invention. Accordingly, the woven flexible display device of the present invention includes a light emitting element line 10, a cathode 11, a separation wall 18, an electric circuit line 20 and a power supply device 40, the power supply device 40 may be composed of a power supply unit 41 for supplying electricity of direct current or alternating current, and a power connection unit 42 for connecting the power supply unit with an electric circuit line and a power supply and a light emitting circuit line.

According to the above structure, the power supply device 40 supplies a current or an electric signal to the cathode 11 and the electric circuit line 20 of the light emitting element line 10, and the light emitting element line is the isolation wall 18 except for the cathode. It is isolated from each other by the state of), and the state in which the electric signal line 20 and the light emitting device line 10 intersect the light emitted from the tissue point 21 is shown.

Referring to the light emitting process at the tissue point as described above in more detail.

In the woven flexible display according to the present invention, when electrons and holes are respectively injected from the cathode and the anode by a power supply device, they are transferred to the light emitting layer through an electron transport layer or a hole transport layer as necessary, and electrons and holes meet and recombine with each other in the light emitting layer. In this case, the light emitted by the emitter emits red / green / blue or other visible light.

Light generated from the light emitting layer is emitted to the outside through the light transmitting anode or hole transport layer. In order to implement various colors, red, green, and blue light emitting device lines are made using light emitting materials emitting red, green, and blue colors in the light emitting layer, and are alternately and repeatedly arranged. These three color intersections serve as red, green, and blue pixels of the display element, and the brightness of these three colors can be adjusted by controlling the current flowing through each intersection, and various colors can be realized by the combination thereof. Can be.

Finally, when the woven flexible display is completed as described above, the surface may be coated with a vinyl film or chemical substance within several tens of micrometers for external blocking to protect the woven structure from the external environment. It is not limited to this.

Since the woven flexible display according to the present invention is based on a fibrous tissue structure, it can be rolled up in a rolled form when carrying, or stretched when it is driven in a folded form, using the flexibility that the fibrous tissue can have. It can be used as an image display device of a terminal or a portable TV, and can also be fabricated by embedding existing clothing or textile tissue into an image displayable garment and fabric to perform various functions, that is, military camouflage according to the season, location and treatment stage of patients. It is possible to implement a garment that displays a variety of information, such as the patient clothing to display. In addition, it is possible to attach to the billboard of the curved wall surface such as the pillar of the building by using the flexible properties.

As described above, although described with reference to a preferred embodiment of the present invention, those skilled in the art will be variously modified and modified within the scope of the present invention without departing from the spirit and scope of the invention described in the claims below. It will be appreciated that it can be changed.

1 is a schematic diagram of a fully flexible woven flexible display device of the present invention based on a fibrous structure.

2 is a schematic diagram of an electric circuit line for a passive matrix of the present invention.

3 is a schematic diagram of a five-layer light emitting device line of the present invention.

4 is a cross-sectional view of a three-layer light emitting device line of the present invention.

5 is a cross-sectional view of a single layer light emitting device line of the present invention;

6 is a side cross-sectional view of a five-layered light emitting device line of the present invention.

7 is an overall structural diagram of a passive matrix of the present invention.

<Code Description of Main Parts of Drawing>

10: light emitting element line 20: electric circuit line

30: reserve

Claims (13)

a) a plurality of strands of electrical circuits, spaced at regular intervals, serving to supply current or electrical signals; b) a plurality of strands of light emitting device lines which emit light by electric current or electric signals received from the outside and are spaced at regular intervals; And c) a power supply for supplying power and an electrical signal to the electrical circuit lines and the light emitting element lines, wherein the electrical circuit lines and the light emitting element lines are organized with one inclination and the other with the weft, and the power supply at both ends. Is connected to the woven flexible display device that emits light at the tissue point where the electric circuit line and the light emitting element line meets. The method of claim 1, wherein the electric circuit line is a metal consisting of a single metal element capable of transmitting a current or an electrical signal, an alloy of two or more metal elements, amorphous metals, amorphous alloys, conductive polymers, superelastic conductive fibers, Woven flexible display device selected from the group consisting of carbon fibers, conductive inorganic materials and composite materials thereof. The method of claim 1, wherein the light emitting device line is a cathode, an electron injection layer, an electron transport layer, a light emitting layer, a hole transport layer, a hole injection layer, and a portion of the anode are sequentially stacked from the inside, and the power source is supplied to the cathode and anode Woven flexible display device that emits light by. The woven flexible display device of claim 1, wherein the light emitting device lines share a center cathode and do not share other layers, and are insulated from each other by an insulating isolation wall formed regularly along the axial direction. The method of claim 1, wherein the light emitting device wire is a metal composed of a single metal element of the anode and the cathode, an alloy of two or more metal elements, amorphous metal, amorphous alloy, conductive polymer, superelastic conductive fiber, carbon fiber, conductive Woven flexible display device selected from inorganic materials and composite materials thereof. The woven flexible display device of claim 1, wherein the anode of the light emitting element line is made of a transparent material. The woven flexible display device of claim 1, wherein the electron injection layer, the electron transport layer, the light emitting layer, the hole transport layer, and the hole injection layer of the light emitting device line are made of an inorganic material, an organic material, or an organic-inorganic mixture. The woven flexible display device of claim 1, wherein an intersection angle between the electric circuit line and the light emitting element line is greater than 0 degrees and less than 90 degrees. The woven flexible display device of claim 1, wherein the electric circuit lines and the light emitting element lines are coupled in the form of irregularities at tissue points crossing each other. The woven flexible display device of claim 1, wherein one or more separate reserve wires, which serve as insulation or signal transmission between two neighboring electric circuit lines or two neighboring light emitting device lines, are regularly included. The apparatus of claim 1, wherein the power supply device comprises: a power supply for supplying electricity of direct current or alternating current; Woven flexible display device including a power connection for connecting the power supply and the electric circuit line and the power supply and the light emitting circuit line to each other. delete An electronic device comprising the woven flexible display device according to any one of claims 1 to 11.

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