KR100349909B1 - Multi display device and method for making the same - Google Patents

Abstract

PURPOSE: In order to realize a large screen by connecting a plurality of flat panel display devices, an object of the present invention is to provide a multi-display apparatus and a method of manufacturing the same, in particular, to minimize the seam of the display device.

Configuration: When at least two or more flat panel display elements 20 and 40 are connected to each other in contact with each other, and sealing one side of the flat panel display elements which face each other, the upper and lower substrates 12 and 12 '. And heat and press the thermosetting resin sheet 100 on the cut surface thereof, and then the protrusion 102 of the thermosetting resin sheet is pushed into the cell of the flat panel display device to more firmly bond the upper and lower substrates. It is characterized by. The upper and lower substrates of the flat panel display device are bonded and sealed by the remaining three sides of the sealant 8.

Effect: Since the seam of both flat panel display elements is minimized, the heterogeneity between the flat panel display elements can be eliminated, and as a result, the display quality of the screen can be improved.

Description

Multi display device and method for making the same

The present invention relates to a multi display device and a method for manufacturing the same, in which a plurality of flat panel display devices are connected to implement a multi screen and a large screen, and in particular, minimizes a contact gap between the display devices to improve display quality of the screen.

BACKGROUND ART A flat panel display device is known as a liquid crystal display (LCD), a thin film transistor (TFT) -LCD, a field emission display (FED), a plasma display panel (PDP) and an electro luminescent (EL) display.

These flat panel display devices are replacing CRTs according to light weight, short weight, and flattening. In particular, flat panel display devices are mainly employed in computer monitors, wall-mounted display devices, and portable devices such as notebook PCs and PDAs.

These flat panel display devices are being enlarged for realizing a window screen of a monitor or a multimedia, but implementing a large screen with a single product is inexpensive due to the high production cost. In addition, when applied to a portable device has a disadvantage that it is difficult to implement a large screen due to the narrow space.

In view of such drawbacks, Korean Patent Application No. 96-41375 proposes a flat panel display device which allows a large screen and multi-drive while reducing its size. Here, a structure for folding the middle portion is presented, but it merely presents a concept for folding by connecting two display elements into one.

In addition, the Korean Utility Model Registration Application No. 97-27489 and Patent Application No. 98-54830 are disclosed as a specific means of connecting the display.

However, the flat panel display apparatuses disclosed in the related art only disclose a configuration in which two flat panel display elements 2 and 4 are foldably connected, as shown in FIG. Since the border portion 6, i.e., the seam of 4) is not considered, the display quality of the screen is degraded as the screens of the two flat panel display elements are separated and clearly distinguished from the border portion.

In an effort to improve such a problem, the sealant 8 of the joint may be formed up to about 100 μm by a precision printing method or an etching method, but the precision printing method is technically difficult, and the protective film 10 is displayed on both flat surfaces. Since the thickness of the protective film 10 and the free space G 0.1 mm are to be attached to the side surfaces of the device, the total length L of the joint 6 is at least 0.5 mm. As a result, there is a problem that it is difficult to expect an improvement in screen quality.

In order to solve the problems of the prior art described above, the present invention, in order to connect the plurality of flat panel display elements to each other, in particular to minimize the border joints of the flat panel display element to remove the heterogeneity of the screen and to improve the display quality The purpose is to.

To this end, in the multi-display apparatus of the present invention, at least two or more flat panel display elements are connected to each other so that one side thereof is in contact with each other. The thermosetting resin sheet is heated and pressed to form protrusions inside the cell of the flat panel display element, and the upper and lower substrates are sealed by the thermosetting resin sheet and the protrusions.

Here, as the flat panel display element, an LCD, FED, PDP or EL display can be used.

In addition, the present invention is a method for realizing a multi-display device having the above configuration, by cutting one side of the flat panel display elements to be opposed to each other as close as possible to the screen display unit, the sealant formed between the upper and lower substrates and the substrates After attaching the thermosetting resin sheet to the cut surface of the heat-curable resin sheet is proposed to a manufacturing method comprising the step of sealing to form a protrusion to the inside of the flat panel display element by heating and pressing.

In the manufacturing method, cutting of one side of the flat panel display device is performed while uniformly compressing the gap to maintain the gap between the upper and lower substrates accurately. The upper and lower substrates of the remaining three sides of the flat panel display device are bonded and sealed by sealants. An end portion of the sealant located on the cut surface of the flat panel display element extends along the cut line to form the screen display portion to enhance the sealing property.

1 is a cross-sectional view showing an unfolded state of a multi-display device according to the present invention.

2 is an enlarged cross-sectional view of a flat panel display device of the present invention;

3 is a cross-sectional view showing a flat panel display device according to another embodiment of the present invention.

4 to 8 illustrate the manufacturing method of the present invention.

9 is a cross-sectional view showing a conventionally known multi display device.

Explanation of symbols on the main parts of the drawings

8-sealant 10-protective film

12,12 'substrate 20,40 flat panel display element

34-screen display 100- thermosetting resin sheet

102-projection 104-protection plate

Hereinafter, preferred embodiments for realizing the present invention will be described with reference to the accompanying drawings. For reference, the same reference numerals will be given to the same parts as the drawings cited in the related art in describing the present invention.

In the multi-display apparatus of the present invention, at least two flat panel display elements can be connected, but a configuration in which two flat panel display elements, which are the most basic of them, are connected. In addition, LCD, FED, PDP, EL display, etc. can be used as a flat panel display element.

1 illustrates an unfolded state of a multi-display apparatus of the present invention, and FIG. 2 is an enlarged view of a flat panel display device of the present invention, and shows a structure using an LCD as a flat panel display device.

The flat panel display elements 20 and 40 are formed by laminating transparent electrodes 14 and 14 'on the inner surface of a pair of substrates 12 and 12', and an insulating layer and an alignment layer (not shown). After sealing, the liquid crystal material 16 is injected into the inner space and sealed, and polarizing plates (not shown) are provided on both front and rear surfaces of the device.

As a characteristic configuration of the present invention, unlike the prior art in which one side of the flat panel display elements 20 and 40 which face each other is sealed by a sealant and a protective film, only the thermosetting resin sheet 100 is used. Since the sealing, it is possible to minimize the distance (L1) of the screen display portion spacing, that is, the border joint of the two flat panel display elements (20, 40). Of course, the upper and lower substrates 12 and 12 'of the remaining three sides of the flat panel display elements 20 and 40 are sealed using the sealant 8 as in the related art.

The sealing structure of the present invention using the thermosetting resin sheet 100 should be at least to maintain the adhesive strength by the conventional sealant (8) in consideration of the structural stability of the flat panel display device, the thermosetting resin sheet (100) Heating and pressurization causes the protrusions 102 to form towards the interior of the cell. Since the protrusion 102 is adhesively cured on the inner surface of the upper and lower substrates 12 and 12 'together with the sides of the upper and lower substrates 12 and 12' adhered to the thermosetting resin sheet 100 surface, The strength is improved.

In addition, in the present invention, as shown in Figure 2, by attaching the protective plate 104 to the thermosetting resin sheet 100 can improve the structural strength, which uses a thin plate made of metal, glass or resin.

The thermosetting resin sheet 100 and the protective plate 104 is preferably made of a transparent material in order to remove the heterogeneity between the two flat panel display elements according to the object of the present invention. Thermosetting resins are known to be of a transparent material, and examples thereof include urea resins, melamine resins, and the like. As the transparent protective plate 104, PET (polyterephthalate) or polycarbonate can be used.

On the other hand, the protective film 10 is attached to the surface of the upper substrate 12 of the flat panel display device 20, 40, which may be installed integrally or separately from the protective plate 104 of the side. The flat panel display devices 20 and 40 formed as described above are supported by connecting means (not shown) and connected to a rotary or casement type, thereby forming a multi display device.

3 shows a structure using an organic EL display as the flat panel display elements 20 and 40 constituting the multi display device of the present invention. Here, the flat panel display elements 20 and 40 seal one side of the upper and lower substrates 12 and 12 'by using the thermosetting resin sheet 100 and the protective plate 104 as shown in FIG. On the upper surface of the lower (or front) substrate 12 ', a transparent electrode 24, a hole transport layer 26, an electron transport layer 28 serving as a light emitting unit, a metal electrode 30, and a protective layer 31 are stacked. The upper portion is configured to have a space S into which a predetermined gas is injected.

As described above, the flat panel display devices 20 and 40 cut the substrates 12 and 12 ′ without using sealants on opposite and adjacent sides, and the thermosetting resin sheet 100 is formed on the cut surface thereof. And the protective plate 104 is sealed.

The multi-display apparatus of the present invention, which is formed by connecting a plurality of flat panel display elements 20 and 40 such as LCD and organic EL as described above, is realized based on the manufacturing steps shown in Figs.

First, the flat panel display elements 20 and 40 of the present invention seal at least the upper and lower substrates on which the transparent electrodes are formed in the cell state using the sealant 8 and then uniformly by the press 32 as shown in FIG. 4. Compress with one pressure. This is to prevent deformation of the gap between the lower substrates 12 and 12 'during the subsequent cutting process, wherein the press pressure is the same as the curing process of the sealant 8 of the flat panel display elements 20 and 40. It is better to carry out under pressure.

The flat panel display elements 20 and 40 compressed at a predetermined pressure are cut at one side of the substrate using a laser as shown in FIG. 5, and the cutting line C is as close as possible to the screen display unit 34 as shown in FIG. 6. Let's do it. As shown in the drawing, the flat panel display elements 20 and 40 may seal all four sides by the sealant 8 and then cut only one side thereof. In addition, as shown in FIG. 7, the sealant 8 may be opened. Can be formed and then cut. In the case of FIG. 7, when the thermosetting resin sheet 100 is attached to the cut surfaces of the flat panel display devices 20 and 40, the adhesive area between the sealant 8 and the thermosetting resin sheet 100 may be increased to improve strength. It is for. At this time, the end portion 8a of the sealant extends along the cutting line to the screen display portion 34.

As shown in FIG. 8, the flat panel display elements 20 and 40 with one side cut out are cut surfaces of the sealant 8 formed between the upper and lower substrates 12 and 12 'and the substrates 12 and 12'. After the thermosetting resin sheet 100 is attached thereto, heating and pressing are simultaneously performed using the press 36 so that the protrusion 102 is formed inside the cell. Moreover, as shown in FIG. 2, the protection plate 104 is attached, heating and pressing.

As described above, the thermosetting resin sheet 100 and the protective plate 104 sealing one side of the flat panel display elements 20 and 40 should maintain the same adhesive strength as the sealant 8. For example, the sealant 8 of the flat panel display element usually maintains an adhesive strength of 1.0 to 1.5 kg / mm.

The cells of the flat panel display devices 20 and 40 formed as described above are completed by injecting the liquid crystal material 16 into the cell and sealing the injection hole.

According to the above-described configuration, the multi-display apparatus of the present invention, for example, has a thickness of 0.7 mm for the substrates 12 and 12 ', 0.1 mm for the width of the sealant 8, and 0.1 for the thickness of the thermosetting resin sheet 100. Mm, the thickness of the protrusion 102 is 0.05 mm, and the clearance between the two flat panel display elements 20 and 40 is 0.1 mm, the joint length L1 of both flat panel display elements 20 and 40 is conventionally known. The measured results compared with the description are as shown in Table 1.

division Conventional (L) Invention (L1) Seam length 0.512 mm 0.35 mm

As shown in Table 1, it can be seen that the multi-display apparatus according to the present invention reduces the distance between the two flat panel display devices 20 and 40 by 32% compared to the prior art under the same conditions.

As can be seen through the configuration described above, according to the multi-display device and the manufacturing method thereof of the present invention, a plurality of screens can be configured as one large screen, and a multi-screen such as a window of a monitor can be realized. Since the distance between the interconnected flat panel display elements, i.e., the seam length, is minimized, it is possible to remove the heterogeneity between the screens and improve the display quality.

Claims (10)

A multi display apparatus having at least two flat panel display elements connected to one side thereof, comprising: a thermosetting resin sheet attached to one side of the flat panel display elements facing each other, wherein the thermosetting resin sheet is heated and pressurized. By pushing the inside of the cell of the flat panel display element is formed by the projection to be bonded to the inner surface of the upper and lower substrates, the one side of the flat panel display element is sealed by the thermosetting resin sheet and the projection formed thereon, the thermosetting The resin sheet is transparent, the multi-display device comprising a configuration further comprising a transparent protective plate for protecting the thermosetting resin sheet. The multi display apparatus according to claim 1, wherein the flat panel display element is an LCD, FED, PDP or EL display. delete delete delete A multi display apparatus having at least two flat panel display elements connected to one side thereof, the method comprising: cutting one side of the flat panel display elements facing each other as close as possible to the screen display unit; Attaching a transparent thermosetting resin sheet to the upper and lower substrates and the cut surface of the sealant formed between the substrates, and heating and pressing to seal the protrusions into the cell of the flat panel display device; and a protective plate on the thermosetting resin sheet. Method of manufacturing a multi-display device comprising the step of attaching. 7. A method according to claim 6, wherein the flat panel display element is an LCD, FED, PDP or EL display. delete The method of manufacturing a multi-display apparatus according to claim 6, wherein a sealant for adhering the upper and lower substrates of the flat panel display element is extended along the cutting line to the screen display unit. The method of manufacturing a multi-display apparatus according to claim 6, wherein the upper and lower substrates of the flat panel display device are cut while pressing.