JP2016066085A - Display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a display device including bent or curved display surfaces without requiring complicated production processes or using a special glass substrate in the display device including a protection plate.SOLUTION: A display device 200 includes: a plurality of display units 4 each of which can independently display an image; a protection plate 10 disposed on the front faces of the plurality of display units 4 such that the plurality of display units 4 are located on the back side; and translucent adhesive layers 3 disposed to cover the respective display surfaces of the plurality of display units 4. The protection plate 10 includes a plurality of bent parts that are bent so as to provide a plurality of portions facing different directions. The plurality of display units 4 are stuck to the respective back sides of the plurality of portions of the protection plate 10 by the translucent adhesive layers 3, so that the plurality of display units 4 are connected, where the respective display surfaces 103 of the plurality of display units 4 face different directions respectively.SELECTED DRAWING: Figure 9

Description

  The present invention relates to a display device, and more particularly to a display device having a bent or curved display surface.

  In recent years, a liquid crystal display (LCD) as a display device has been widely used for various applications due to its advantages such as light weight and thinness.

  A liquid crystal display panel used in a liquid crystal display device has a configuration in which glass substrates on which wirings and electrodes are formed face each other and liquid crystal is sandwiched between the substrates. Then, polarizing plates are respectively attached to the image display surface side of the liquid crystal display panel, that is, the front surface side and the opposite back surface side.

  On one glass substrate, TFTs (thin film transistors) and pixel electrodes are arranged in a region surrounded by a plurality of scanning wirings (gate wirings) in the horizontal direction and a plurality of signal wirings (source wirings) orthogonal thereto. It is also called a TFT substrate. The other glass substrate is provided with a counter electrode to which a constant voltage is supplied, and is also referred to as a counter substrate. One pixel is composed of the pixel electrode, the counter electrode, and the liquid crystal layer sandwiched between the two electrodes.

  By sequentially applying a scanning signal to the scanning wiring of the TFT substrate every horizontal scanning period, and further applying a predetermined signal voltage to the signal wiring (source wiring) in the vertical direction and applying a display voltage to the corresponding pixel electrode. An image is displayed.

  This display image is visually recognized by an observer when light is irradiated by a backlight installed on the back surface of the liquid crystal panel.

  As described above, the liquid crystal display device is a so-called light receiving type display device including a liquid crystal display panel that controls light transmittance for each pixel and a backlight, and is used for various applications using this characteristic. ing. For example, it is used as a display for personal computers, devices used for industrial purposes, an in-vehicle display device, a handy terminal, and an advertisement display.

  Display devices used in these various environments are also required to have high design properties, and curved display devices have been developed.

  As a method for manufacturing a curved display device, for example, Patent Document 1 discloses a technique in which a liquid crystal panel is curved by heating and cooling with a mold. Patent Document 2 discloses a method of obtaining a curved liquid crystal panel using a glass substrate in which the glass curvature direction is positive or negative in the end region and other regions. In Patent Document 3, a plurality of liquid crystal panels are arranged adjacent to each other, a polarizing plate is attached so as to cross between the liquid crystal panels, and an individual liquid crystal panel is attached to a support having a concave lens-like curved surface. A method of obtaining a liquid crystal display device having a curved display surface by curving along a curved surface of a support is disclosed.

Japanese Patent Laid-Open No. 04-104122 JP 2009-42565 A JP 2005-91873 A

  As explained above, the liquid crystal panel used in the liquid crystal display device is composed of two glass substrates bonded together. However, since the glass substrate has high rigidity, there is a patent for bending the liquid crystal panel. As disclosed in Document 1, it requires a complicated manufacturing process such as heating and cooling, and cannot be easily bent. Moreover, it was necessary to use a special glass substrate, such as using a glass substrate in which the curvature direction of the glass is positive or negative in the end region and other regions as in Patent Document 2.

  Moreover, in the method disclosed in Patent Document 3, in order to curve each liquid crystal panel along the curved surface of the support, the thickness of each liquid crystal panel must be reduced, and the liquid crystal panel is easily damaged. There was a problem. In addition, in a configuration with a protective plate that protects the liquid crystal panel against external impact, when the liquid crystal panel is bent, the liquid crystal panel may be damaged due to the difference in rigidity between the liquid crystal panel and the protective plate. There is also.

  The present invention has been made to solve the above-described problems. In a display device provided with a protective plate, it does not require a complicated manufacturing process, and is not bent or used without using a special glass substrate. It is an object to provide a display device having a curved display surface.

  According to a first aspect of the display device of the present invention, a plurality of display units each capable of displaying an image independently, and the front surfaces of the plurality of display units are arranged so that the plurality of display unit sides are on the back surface. A protective plate and a translucent adhesive layer disposed to cover the display surfaces of the plurality of display units, and the protective plate has a plurality of bent portions and is bent. And the plurality of display units are bonded to the back surfaces of the plurality of portions of the protection plate by the light-transmitting adhesive layer. The display units are connected, and the display surfaces of the plurality of display units face different directions.

  According to the aspect of the display device according to the present invention, a display device having a curved display surface can be obtained without requiring a complicated manufacturing process and without using a special glass substrate.

It is a disassembled perspective view which shows schematic structure of the display apparatus of Embodiment 1 which concerns on this invention. It is a side view which shows the state which bends and uses the display apparatus of Embodiment 1 which concerns on this invention so that a display surface may become concave shape. It is a side view which shows the state which bends and uses the display apparatus of Embodiment 1 which concerns on this invention so that a display surface may become convex shape. It is a side view at the time of using a concave-shaped protection board for the display apparatus of Embodiment 1 which concerns on this invention. It is a side view at the time of using a convex-shaped protection board for the display apparatus of Embodiment 1 which concerns on this invention. It is a disassembled perspective view which shows schematic structure of the display apparatus of the modification 1 of Embodiment 1 which concerns on this invention. It is a disassembled perspective view which shows schematic structure of the display apparatus of the modification 2 of Embodiment 1 which concerns on this invention. It is a side view of the display apparatus of the modification 2 of Embodiment 1 which concerns on this invention. It is a side view which shows the state which bends and uses the display apparatus of Embodiment 2 which concerns on this invention so that a display surface may become concave shape. It is a side view which shows the state which bends and uses the display apparatus of Embodiment 2 which concerns on this invention so that a display surface may become convex shape. It is a side view at the time of using the protective plate curved concavely for the display apparatus of Embodiment 2 which concerns on this invention. It is a side view at the time of using the protective plate curved convexly for the display apparatus of Embodiment 2 which concerns on this invention.

<Embodiment 1>
<Device configuration>
FIG. 1 is an exploded perspective view showing a schematic configuration of a display device 100 according to Embodiment 1 of the present invention, and FIG. 2 is bent so that a display surface 101 of the display device 100 shown in FIG. FIG. 3 is a side view showing a state in which the display surface 102 of the display device 100 is bent and used so as to be convex.

  As shown in FIG. 1, in the display device 100, a plurality of display units 4 are arranged so that pairs of sides are parallel, such as a long side and a long side, or a short side and a short side, A plurality of display units 4 are connected to each other by pasting the connecting sheet 2 on the image display surface side of the display unit 4, that is, the front side, so as to extend over the plurality of display units 4.

  The display unit 4 includes a flat display panel such as a liquid crystal display panel, a plasma display panel (PDP), an organic EL display (OELD) panel, and a field emission display (FED) panel. And if it is a liquid crystal display panel, the backlight arrange | positioned on the back side will also be provided. In the present invention, the internal configuration of the display unit 4 is irrelevant, and a panel other than those described above may be used as long as it is a flat display panel, and any structure that operates independently as a display device may be used.

  The display unit 4 is configured such that a flat display panel is accommodated in a thin casing 41 having an opening OP on one main surface side, and the display surface 5 is exposed at the opening OP. A portion of the casing 41 around the opening OP is referred to as a frame 42.

  The plurality of display units 4 are arranged adjacent to each other so that the respective display surfaces 5 face the same direction and the paired sides are parallel to each other.

  A flat protective plate 1 made of a transparent material such as acrylic, polycarbonate or glass is disposed on the display surface 5 side of the display unit 4 for protection against external impacts. Instead of being directly attached, a plurality of protective plates 1 are attached to the connecting sheet 2.

  That is, the plurality of protective plates 1 are arranged with the back surface facing the display surface 5 of the display unit 4 and according to the arrangement of the plurality of display units 4, and on the back surface are PET (polyethylene terephthalate), polycarbonate, polyester, silicon A connecting sheet 2 made of a transparent material having flexibility such as the above is attached so as to extend over the plurality of protective plates 1. In addition, it is set as the structure by which the adhesive material (not shown) was apply | coated to the front surface side of the connection sheet 2, ie, the main surface side which opposes the back surface side of the protection board 1, and by putting the protection board 1 there, it is several The connecting sheet 2 is pasted so as to cover the entire protection plate 1.

  Here, the connecting sheet 2 has a larger area than the arrangement of the protective plates 1 and the arrangement of the display units 4. When the connection sheet 2 is arranged on the arrangement of the display units 4 with the protective plate 1 attached, Each protective plate 1 completely covers the display surface 5.

  The connection sheet 2 and the display unit 4 are bonded by providing the light-transmitting adhesive layer 3 so as to cover the display surface 5 of the display unit 4 and attaching the back surface of the connection sheet 2 thereto. In this case, an air layer is not interposed between the back surface of the connecting sheet 2 and the display surface 5 of the display unit 4 due to the presence of the translucent adhesive layer 3. Here, an acrylic adhesive, an epoxy adhesive, a silicon adhesive, or the like is used for the translucent adhesive layer 3.

  2 and 3, when the display device 100 is bent into a concave shape and a convex shape, gaps 15 and 16 are formed between the adjacent protective plates 1 and between the display units 4, respectively. Further, the protective plates 1 and the display units 4 are arranged with a predetermined distance therebetween.

  When the display surface of the display device 100 is concave as shown in FIG. 2, the connecting sheet 2 corresponding to the gaps 15 and 16 is bent so that it extends on the gap 16 side and contracts on the gap 15 side. . Thereby, the concave display surface 101 of the display device 100 is formed by the combination of the display surfaces 5 of the plurality of display units 4.

  On the other hand, when the display surface of the display device 100 is convex as shown in FIG. 3, the connecting sheet 2 of the portion (connecting portion) corresponding to the gaps 15 and 16 is extended on the gap 15 side and on the gap 16 side. Bend to shrink. Thereby, the convex display surface 102 of the display device 100 is formed by the combination of the display surfaces 5 of the plurality of display units 4.

  As described above, the display device 100 according to the first embodiment attaches the flexible connecting sheet 2 so as to cover the whole of the plurality of protection plates 1, thereby attaching the plurality of adjacent display units 4. The display device 100 having the concave display surface 101 or the convex display surface 102 can be obtained by connecting and bending the connection portion.

  For this reason, since it is not necessary to use a complicated manufacturing process for bending a flat display panel formed of a glass substrate, the manufacturing process can be simplified, and the flat display panel and the protective plate are not damaged.

  Further, since the connecting portion is constituted by the connecting sheet 2, the display units 4 and the protective plates 1 can be connected to each other without increasing the number of parts such as hinge members, and the individual display surfaces are arranged in different directions. It becomes possible.

  In the above description, the protective plate 1 is a flat plate, but is not limited thereto. For example, as shown in FIG. 4, when the display device 100 is configured to have a concave display surface 101, the main surface on the side attached to the connecting sheet 2 is a flat surface, and the main surface on the opposite side is A protective plate 6 having a concave surface may be used.

  In this way, by matching the shape of the concave display surface 101 of the display device 100, it is possible to meet the required specifications, shapes, and designs.

  As shown in FIG. 5, when the display device 100 is configured to have a convex display surface 102, the main surface on the side to be attached to the connecting sheet 2 is a flat surface, and the main surface on the opposite side. A protective plate 7 having a convex surface may be used.

  In this way, by matching the shape of the convex display surface 102 of the display device 100, it is possible to meet the required specifications, shape, and design.

<Modification 1>
FIG. 6 is an exploded perspective view showing a schematic configuration of a display device 100A of Modification 1 of Embodiment 1 according to the present invention. In addition, the same code | symbol is attached | subjected about the structure same as the display apparatus 100 shown in FIG. 1, and the overlapping description is abbreviate | omitted.

  2A and 2B are a side view showing a state in which the display surface of the display device 100A is bent so as to be concave, and a side view showing a state in which the display surface is bent so as to be convex, respectively. And it is the same as what was demonstrated using FIG.

  As shown in FIG. 6, in the display device 100 </ b> A, the plurality of protection plates 1 are arranged in accordance with the arrangement of the plurality of display units 4 while the back surface faces the display surface 5 of the display unit 4. A connecting sheet 2 </ b> A made of a transparent material having flexibility such as PET, polycarbonate, polyester, or silicon is attached to the plurality of protection plates 1.

  Here, the outer shape of the connecting sheet 2A is larger than the array of the protective plates 1 and the array of the display units 4, but the area overlapping the display surface 5 of the display unit 4 becomes the opening 9, and the window frame seems to be continuous. It has become a structure.

  In addition, it is set as the structure by which the adhesive material (not shown) was apply | coated to the front surface side of 2 A of connection sheets, ie, the main surface side which opposes the back surface side of the protection plate 1, and by putting the protection plate 1 there, it is several The connecting sheet 2 </ b> A is pasted so as to cross over the protection plate 1.

  The connecting sheet 2A and the display unit 4 are provided with a translucent adhesive layer 3 so as to cover the display surface 5 of the display unit 4, and a window frame portion around the opening 9 on the back surface of the connecting sheet 2A is pasted thereon. It is glued by attaching. In this case, the back surface of the protective plate 1 and the display surface 5 of the display unit 4 are directly bonded by the translucent adhesive layer 3, and the air layer is formed between them due to the presence of the translucent adhesive layer 3. There is no intervening state.

  By using the connection sheet 2A in which the area overlapping the display surface 5 of the display unit 4 is the opening 9, the member of the connection sheet 2A is not interposed on the display surface 5, and the member of the connection sheet 2A is not present on the display surface 5. It is possible to reduce the color change and the luminance change of the display image due to the intervening.

  Although the connecting sheet 2A has been described as being made of a transparent material, the connecting sheet 2A does not overlap on the display surface 5 of the display unit 4, and thus is not limited to a transparent material.

<Modification 2>
FIG. 7 is an exploded perspective view showing a schematic configuration of a display device 100B of Modification 2 of Embodiment 1 according to the present invention. In addition, the same code | symbol is attached | subjected about the structure same as the display apparatus 100 shown in FIG. 1, and the overlapping description is abbreviate | omitted. FIG. 8 is a side view showing a state in which the display surface of the display device 100B is bent and used so as to have a convex shape.

  As shown in FIG. 7, in the display device 100 </ b> B, the plurality of protection plates 1 are arranged in accordance with the arrangement of the plurality of display units 4 while the back surface faces the display surface 5 of the display unit 4. A connecting sheet 2B made of a transparent material having flexibility, such as PET, polycarbonate, polyester, or silicon, is attached so as to extend over only adjacent edge portions of adjacent protective plates 1.

  Here, the outer shape of the connecting sheet 2B is rectangular and has a length substantially equal to the length of the adjacent edge portions of the protective plate 1, and the width thereof is the adjacent edge of the adjacent protective plate 1. The dimensions are set so as not to overlap the upper part of the display surface 5 of the display unit 4 although it extends over the part. That is, it is set so that the upper part of the adjacent frame of the adjacent display unit 4 is covered, but the upper part of the display surface 5 of the display unit 4 is not covered.

  In addition, it is set as the structure by which the adhesive material (not shown) was apply | coated to the front surface side of the connection sheet 2B, ie, the main surface side facing the back surface side of the protection board 1, and the adjacent edge part of the adjacent protection board 1 is used. A plurality of protective plates 1 are connected by pasting so as to cross over.

  The connection sheet 2 </ b> B and the display unit 4 are bonded by providing the light-transmitting adhesive layer 3 so as to cover the display surface 5 of the display unit 4 and attaching the back surface of the protective plate 1 thereto. In this case, the back surface of the protective plate 1 and the display surface 5 of the display unit 4 are directly bonded by the translucent adhesive layer 3, and the air layer is formed between them due to the presence of the translucent adhesive layer 3. There is no intervening state.

  In this way, by attaching the connection sheet 2B so as to extend over only adjacent edge portions of the adjacent protective plates 1, the size of the connection sheet can be reduced, and the manufacturing cost can be reduced.

  In addition, although the connection sheet 2B was demonstrated as what is comprised with a transparent material, since the connection sheet 2B does not overlap on the display surface 5 of the display unit 4, it is not limited to a transparent material.

<Embodiment 2>
<Device configuration>
FIG. 9 is a side view showing a schematic configuration of the display device 200 according to the second embodiment of the present invention. In addition, the same code | symbol is attached | subjected about the structure same as the display apparatus 100 shown in FIG. 1, and the overlapping description is abbreviate | omitted.

  As shown in FIG. 9, in the display device 200, the display unit 4 is provided on the back surface of each flat surface portion 12 of the protective plate 10 that has a plurality of bent portions in the longitudinal direction and is bent. A plurality of display units 4 are connected by pasting.

  The protective plate 10 is made of a transparent material such as acrylic, polycarbonate, or glass, and the display unit 4 is bonded to the back surface of the display unit 4 by a translucent adhesive layer 3 provided so as to cover the display surface of the display unit 4. It has a configuration. In this case, the back surface of each flat portion 12 of the protective plate 10 and the display surface of the display unit 4 are directly bonded by the translucent adhesive layer 3, and the translucent adhesive layer 3 is interposed between them. Due to the presence, no air layer is present.

  Here, the protective plate 10 has dimensions that the display unit 4 does not protrude when the display unit 4 is attached, and the protective plate 10 covers the display surface of each display unit 4 completely.

  In the display device 200 shown in FIG. 9, the protective plate 10 has a shape bent concavely with respect to the front surface so that the display surface 103 is concave.

  On the other hand, the display device 200 shown in FIG. 10 has a shape in which the protective plate 10 is bent convexly with respect to the front surface so that the display surface 104 is convex.

  As described above, the display device 200 according to the second embodiment connects the plurality of display units 4 by pasting the display unit 4 to the flat surface portion 12 of the protective plate 10, thereby forming the concave display surface 103 or the convex. The display device 200 having the display surface 104 having the shape can be obtained.

  For this reason, since it is not necessary to use a complicated manufacturing process for curving a flat display panel formed of a glass substrate, the manufacturing process can be simplified and the flat display panel is not damaged.

  Further, since the plurality of display units 4 are connected by the protective plate 10, the display units 4 can be connected without increasing the number of components such as hinge members, and the individual display surfaces can be arranged in different directions.

  Further, by connecting the plurality of display units 4 with the protection plate 10, it is possible to provide a display device that can be integrated with each display unit and is resistant to deformation due to external force.

  In the above description, the protective plate 10 has been described as having a plurality of bent portions in the longitudinal direction and having a plurality of flat portions 12, but is not limited thereto. For example, as shown in FIG. 11, when the display device 200 is configured to have a concave display surface 103, the main surface (back surface) on the side where the display unit 4 is attached is a flat surface opposite to the back surface. Since the main surface on the side has the concave surface portion 13, the protective plate 10A in which the display surface 103 is curved in a concave shape as a whole may be used.

  In this way, by matching the shape of the front surface of the protective plate 10A to the shape of the concave display surface 103 of the display device 200, it is possible to meet the required specifications, shapes, and designs.

  In addition, as shown in FIG. 12, when the display device 200 is configured to have a convex display surface 104, the main surface (back surface) to which the display unit 4 is attached is a flat surface, Since the main surface on the opposite side has the convex surface portion 14, the protective plate 10B in which the display surface 104 is curved in a convex shape as a whole may be used.

  Thus, by matching the shape of the front surface of the protective plate 10B with the shape of the convex display surface 104 of the display device 200, it is possible to meet the required specifications, shapes, and designs.

  In the display devices according to the first and second embodiments described above, an example in which a plurality of display units 4 are arranged in one row is shown, but the present invention is not limited to this, and two rows, three rows, etc. There is no limitation on the number of arrangements, and the number is not limited as long as the number of display units 4 per row is also plural.

  In the present invention, the embodiments can be appropriately modified and omitted within the scope of the invention.

  1, 6, 7, 10, 10A, 10B Protection plate, 2, 2A, 2B connecting sheet, 3 translucent adhesive layer, 4 display unit, 5 display surface.

Claims (3)

A plurality of display units each capable of independently displaying images;
A protective plate disposed on the front surface of the plurality of display units, such that the plurality of display unit sides are back surfaces;
A translucent adhesive layer disposed so as to cover each display surface of the plurality of display units,
The protective plate has a plurality of portions with different facing directions by bending with a plurality of bent portions,
The plurality of display units are connected to each of the plurality of display units by bonding the plurality of display units to the back surfaces of the plurality of portions of the protection plate by the light-transmitting adhesive layer. The display surface of the display device faces in different directions. The plurality of portions of the protection plate are:
The display device according to claim 1, wherein the back surface is a flat surface, and the main surface opposite to the back surface is a concave surface, whereby the display surface has a concave curved shape as a whole. The plurality of portions of the protection plate are:
The display device according to claim 1, wherein the back surface is a flat surface, and the main surface opposite to the back surface is a convex surface, whereby the display surface has a shape curved in a convex shape as a whole.

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