JP2016031396A - Self-standing display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a self-standing display device that has improved self-standing stability and has good visibility of a display part.SOLUTION: There is provided a self-standing display device 1 having a display part 2 and a support part 3 supporting the display part 2 from below, where the display part 2 has a display panel 21 and a cover member 22 protecting a display screen 21a of the display panel 21; the cover member 22 is a glass resin laminate having a five-layer laminated structure comprising a glass sheet/transparent adhesive layer/transparent resin layer/transparent adhesive layer/glass sheet; the glass sheet has a thickness of 1,200 μm or less.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a self-supporting large-sized display device that is mainly installed in a public place such as a station such as a digital signage or an information guide board.

  In recent years, digital signage that displays images on a flat panel display has started to be used in place of conventional poster display printed on paper or the like. Unlike printed materials such as posters, where information is fixed once printed, digital signage has the advantage that display contents can be easily switched. In addition, since digital signage can also display moving images and the like, it is considered to have a higher appealing effect on the viewer, and more effective in advertising than a printed matter such as a conventional poster.

  Examples of flat panel displays used for digital signage include liquid crystal displays, organic EL displays, and plasma displays. Unlike conventional printed materials such as posters that can be easily attached to a wall or the like, a large-scale construction is required to install these displays on existing walls or pillars.

  In order to solve this problem, Patent Document 1 below proposes a self-supporting digital signage. A self-supporting digital signage can be easily installed in any place as long as the power supply of the display device can be secured. Such a display unit of a self-supporting digital signage is often provided above the apparatus via a support member in order to match the height of the human eye as an advertisement target.

JP 2010-249948 A

  Tempered glass is used for the cover member that protects the display part of the digital signage described in Patent Document 1. The strength of the tempered glass is enhanced by the compressive stress layer formed on the surface layer, but if a scratch from the surface reaches the internal tensile stress layer, there is a possibility that it will be destroyed and scattered around. For this reason, when tempered glass is used as the cover member, the tempered glass as a whole needs to have a certain thickness in order to secure the thickness of the compressive stress layer. Digital signage, in particular, is installed in public places such as stations where an unspecified number of people come and go, unlike ordinary home-use televisions. Therefore, it is necessary to prevent the tempered glass used as a cover member for protecting the display unit from being damaged from the viewpoint of ensuring the safety of humans who come and go, and a plate glass having a thickness of 5 mm or more may be used. Many.

  However, glass is a relatively dense and heavy material. As described above, since the display unit is provided above the device, if tempered glass having a thickness of 5 mm or more is used as a cover member for the display unit of such a self-supporting digital signage, the center of gravity of the digital signage itself is positioned above. Therefore, the independence of digital signage may become very unstable. In this case, since the display device positioned above the support member positioned below is heavier, the self-supporting digital signage may fall down when a person collides with the digital signage.

  On the other hand, it is also conceivable to employ a transparent resin body such as polycarbonate or acrylic as the cover member of the display unit.

  However, since a transparent resin body such as polycarbonate or acrylic has a lower rigidity than glass, there is a possibility that it will buckle and deform due to its own weight when used as a cover member on the front surface of the display unit. In addition, since the transparent resin body has low heat resistance, when used as a cover member on the front surface of the display unit, heat from the display unit may cause warpage. If the cover member is deformed, the visibility of the image on the display unit deteriorates, and the expected advertisement effect may not be obtained.

  The present invention has been made to solve the above-described problems of the prior art, and provides a self-supporting display device that improves the self-supporting stability of the self-supporting display device and has good visibility of the display unit. The purpose is to propose.

  The invention devised to solve the above problems is a self-supporting display device having a display unit and a support unit that supports the display unit from below, wherein the display unit includes a display panel and the display panel. A cover member that protects the display screen, and the cover member is a glass resin laminate having a laminated structure of five layers composed of a glass sheet / transparent adhesive layer / transparent resin layer / transparent adhesive layer / glass sheet, The glass sheet has a thickness of 1200 μm or less, and relates to a self-supporting display device.

  The said structure WHEREIN: It is preferable that the length of the vertical direction of the said display part is 30 to 80% of the height of the said self-supporting display apparatus.

  The said structure WHEREIN: It is preferable that the said cover member is provided in the opening-and-closing door shape so that rotation is possible.

  The said structure WHEREIN: It is preferable that the said cover member is spaced apart from the said display panel.

  According to the present invention, it is possible to manufacture a self-supporting display device that can be stably installed and has good visibility of a display unit.

1 is a perspective view of a self-supporting display device according to the present invention. It is side sectional drawing of the self-supporting display apparatus which concerns on this invention. It is sectional drawing of the glass resin laminated body used as a cover member based on this invention. It is the figure which showed an example of the manufacturing method of the glass sheet which concerns on this invention. It is sectional drawing of the glass resin laminated body used as a cover member based on this invention provided with the antireflection layer. It is a perspective view of a self-supporting display device in which a cover member is provided so as to be rotatable like an open / close door.

  Hereinafter, a preferred embodiment of a self-supporting display device according to the present invention will be described with reference to the drawings.

  As shown in FIG. 1, the self-supporting display device 1 according to the present invention includes a display unit 2 and a support unit 3 that supports the display unit 2 from below.

  As shown in FIG. 2, the display unit 2 includes a display panel 21 and a cover member 22 that protects the display screen 21 a of the display panel 21.

  As the display panel 21, a liquid crystal display, an organic EL display, a laser display, a plasma display, or the like can be used. In particular, it is preferable to use a liquid crystal display because the amount of heat generation is small and the thickness can be reduced.

  As shown in FIG. 3, the cover member 22 is a glass resin laminate having a five-layer laminate structure composed of a glass sheet 22 a / transparent adhesive layer 22 b / transparent resin layer 22 c / transparent adhesive layer 22 b / glass sheet 22 a.

  As the glass sheet 22a, silicate glass and silica glass are used, preferably borosilicate glass, soda lime glass, and aluminosilicate glass, and most preferably non-alkali glass. By using non-alkali glass as the glass sheet 22a, the transparency of the cover member 22 can be improved, and the visibility of the image displayed on the display screen 21a of the internal display panel 21 can be improved. Here, the alkali-free glass is a glass that does not substantially contain an alkali component (alkali metal oxide), and specifically, a glass having an alkali component weight ratio of 3000 ppm or less. It is. The weight ratio of the alkali component in the present invention is preferably 1000 ppm or less, more preferably 500 ppm or less, and most preferably 300 ppm or less.

As the glass sheet 22a, it is preferable to use chemically tempered glass when strength is required. For the case of using a chemically reinforced glass as the glass sheet 22a, as a glass composition, in _{mass%, SiO 2 50~80%, Al} 2 O 3 5~25%, B 2 O 3 0~15%, Na 2 O _1-20%, it is preferable to use a tempered glass plate containing K 2 O 0~10%. If the glass composition range is regulated as described above, it becomes easy to achieve both ion exchange performance and devitrification resistance at a high level.

  As the two glass sheets 22a, the same type of glass composition may be used, or different types of glass compositions may be used. For example, in order to use alkali-free glass that is superior in weather resistance and chemical resistance for the glass sheet 22a on the side exposed to an external environment that is frequently contacted by an observer and easily contaminated with fingerprints or the like, or to ensure strength. While using chemically strengthened glass, soda lime glass or the like can be used for the glass sheet 22a on the side facing the display panel 21.

  As shown in FIG. 3, both outermost layers of the cover member 22 are composed of glass sheets 22 a. Accordingly, the transparent resin layer 22c having low heat resistance and easily buckling can be supported by the glass sheet 22a having high heat resistance and high rigidity, and appropriately protects the transparent resin layer 22c having poor scratch resistance. be able to.

  The thickness of the glass sheet 22a is 1200 μm or less. Thereby, since the ratio for which the glass sheet 22a accounts in the cover member 22 reduces, the weight reduction of the cover member 22 can be achieved. Thereby, the weight of the display unit 2 can be reduced, and the self-supporting display device 1 can be stabilized independently. When the thickness of the glass sheet 22a exceeds 1200 μm, the weight of the glass sheet 22a increases in the cover member 22, and thus it is difficult to reduce the weight of the cover member 22.

  The thickness of the glass sheet 22a is preferably 800 μm or less, more preferably 20 μm to 500 μm, and most preferably 100 μm to 300 μm. Thereby, the thickness of the glass sheet 22a can be made thinner, and the weight of the cover member 22 can be reduced more efficiently. If the thickness of the glass sheet 22a is less than 20 μm, the strength of the glass sheet 22a tends to be insufficient, and it is difficult to prevent buckling deformation of the transparent resin layer 22c when the cover member 22 is installed in the self-supporting display device 1. There is a risk. In the case of using tempered glass as the glass sheet 22a, the thickness of the glass sheet 22a is preferably 300 μm to 1100 μm, and more preferably 500 μm to 1100 μm from the viewpoint of securing strength.

  The thickness of the two glass sheets 22a may be the same or different. For example, in the cover member 22, the thickness of the glass sheet 22a on the side exposed to the external environment where there is a lot of contact by an observer and easily contaminated with fingerprints or the like is set to be thick (for example, 300 μm), and the glass on the display panel 21 side. The thickness of the sheet 22a may be set thin (for example, 200 μm).

The density of the glass sheet 22a is preferably as low as possible. Thereby, the weight reduction of the glass sheet 22a can be achieved, and the weight reduction of the cover member 22 can be achieved by extension. Specifically, the density of the glass sheet 22a is preferably 2.6 g / cm ³ or less, and more preferably 2.5 g / cm ³ or less.

  The Young's modulus of the glass sheet 22a is preferably as high as possible. Thereby, even if the thickness of the glass sheet 22a is reduced to 1200 μm or less, it becomes difficult to bend due to its own weight. As a result, as shown in FIGS. 1 and 2, when the cover member 22 according to the present invention is attached to the self-supporting display device 1 in a standing state, the cover member 22 is prevented from being buckled and deformed by its own weight. can do. The Young's modulus of the glass sheet 22a is preferably 70 GPa or more. As a result, the cover member 22 can be a member that is lightweight and requires rigidity.

  The glass sheet 22a used in the present invention can be produced by using a known float method, rollout method, slot down draw method, redraw method, etc., as shown in FIG. 4, by the overflow down draw method. It is preferably molded. Thereby, a glass sheet with a thickness of 1200 μm or less can be produced in large quantities and at low cost. The glass sheet produced by the overflow downdraw method does not need to adjust the thickness of the glass sheet by polishing, grinding, chemical etching, or the like. In addition, the overflow down draw method is a molding method in which both sides of the glass plate do not come into contact with the molded member at the time of molding, and both sides (translucent surface) of the obtained glass plate are fire-making surfaces and do not polish. Even high surface quality can be obtained. Thereby, the adhesive force of the transparent adhesive layer 22b can be improved, and the glass sheet 22a and the transparent resin layer 22c can be laminated more accurately and precisely.

  Inside the forming furnace 41 of the manufacturing apparatus 4, a formed body 42 having an outer surface shape with a wedge-shaped cross section is disposed, and glass (molten glass) melted in a melting furnace (not shown) is supplied to the formed body 42. Thus, the molten glass overflows from the top of the molded body 42. And the molten glass which overflowed passes along the both sides | surfaces which exhibit the cross-sectional wedge shape of the molded object 42, and joins by a lower end, and shaping | molding of the glass ribbon G is started from molten glass. The glass ribbon G just after joining at the lower end of the formed body 42 is drawn downward while being contracted in the width direction by the cooling roller (edge roller) 43 and is thinned to a predetermined thickness. Next, the glass ribbon G having reached the predetermined thickness is sent out by a roller 44 to be gradually cooled in a slow cooling furnace (annealer), the thermal distortion of the glass ribbon G is removed, and the slowly cooled glass ribbon G is heated to about room temperature. It is designed to cool sufficiently to the temperature. After the glass ribbon G that has passed through the slow cooling furnace is changed in the traveling direction from the vertical direction to the horizontal direction by the bending auxiliary roller 45, unnecessary portions (cooling roller 43, roller 44, etc.) present at both ends in the width direction of the glass ribbon G are used. The contacted part) is cut by the longitudinal cutting device 46. Then, the glass sheet 22a used by this invention can be obtained by cut | disconnecting for every predetermined width with the width direction cutting device 47. FIG. Alternatively, the glass sheet 22a may be produced by cutting and removing unnecessary portions of the glass ribbon G with the longitudinal direction cutting device 46 after cutting in the width direction with the width direction cutting device 47. Further, in the manufacturing apparatus 4 described above, the method for producing the glass sheet 22a by the single wafer type has been described. However, the present invention is not limited to this, and the unnecessary part is cut by the longitudinal cutting apparatus 46 and then cut in the width direction. Alternatively, the glass roll may be produced by winding the glass ribbon G into a roll via a packing buffer sheet. Further, in the manufacturing apparatus 4 described above, the method of manufacturing the flexible glass sheet 22a has been described. However, in the case of manufacturing the relatively thick glass sheet 22a having a thickness of 300 to 1200 μm, the auxiliary bending roller It is also possible to manufacture the glass sheet 22a in a single-wafer type by cutting each predetermined width with the width direction cutting device 47 while maintaining the vertical posture without providing 45.

  The transparent adhesive layer 22b bonds the glass sheet 22a and the transparent resin layer 22c. The material of the transparent adhesive layer 22b is not particularly limited, and a double-sided pressure-sensitive adhesive sheet, a thermoplastic adhesive sheet, a heat-crosslinkable adhesive sheet, an energy curable liquid adhesive, and the like can be used. Sheets, EVA, TPU, COP, acrylic thermoplastic adhesive sheets, ultraviolet curable adhesives, thermosetting adhesives, room temperature curable adhesives, and the like may be used. When using an adhesive, it is preferable to use an adhesive that exhibits a transparent state after bonding. Further, if the transparent adhesive layer 22b has ultraviolet shielding properties (ultraviolet absorption), the transparent resin layer 22c can be prevented from being deteriorated by ultraviolet rays when the self-supporting display device 1 is installed outdoors.

  The transparent adhesive layer 22b preferably has a total light transmittance of 85% or more. Thereby, an observer can visually recognize an internal image without impairing the hue of the image displayed on the display panel 21. The transparent adhesive layer 22b has a total light transmittance of more preferably 90% or more, and most preferably 92% or more.

  The thickness of the transparent adhesive layer 22b is preferably 25 μm to 1000 μm, more preferably 50 μm to 800 μm, and even more preferably 100 μm to 600 μm. The transparent adhesive layer 22b is made of a stretchable material, and the larger the thickness, the greater the difference in expansion and contraction due to the difference in thermal expansion between the transparent resin layer 22c and the glass sheet 22a.

  The transparent adhesive layer 22b preferably has a haze of 2% or less. Thereby, when the material with high transparency, such as an acryl and a polycarbonate, is used as the transparent resin layer 22c, it can be set as the cover member 22 with high transparency. The transparent adhesive layer 22b preferably has a haze of 1% or less, and more preferably 0.5% or less.

  The transparent resin layer 22c is not particularly limited as long as it is a transparent resin, and for example, acrylic, polycarbonate, PET, COP or the like can be used. In particular, acrylic and polycarbonate are preferably used because of excellent transparency and widespread use as a protective cover. The transparent resin layer 22c is preferably colorless and transparent, but may be colored to such an extent that the visibility of the image displayed on the display screen 21a is not impaired. For example, when the transparent resin layer 22c exhibits a light green color, the texture of the glass plate may be produced by setting the color to a color equivalent to that of a general soda lime glass.

  The thickness of the transparent resin layer 22c is preferably equal to or greater than the thickness of the two glass sheets 22a (total thickness of the glass sheets), and is 1.5 times or more the thickness of the two glass sheets 22a. It is more preferable. As a result, the ratio of the transparent resin layer 22c in the cover member 22 increases, so that the weight of the entire cover member 22 can be further reduced, and the self-supporting display device 1 can be more effectively stabilized. Can be planned.

  FIG. 5 is a view showing another embodiment of the glass resin laminate used as the cover member 22. In FIG. 5, antireflection film layers 22d are formed on both outer surfaces of the glass sheet 22a. The luminous reflectance of the antireflection layer 22d is preferably 2% or less. Thereby, it can be set as the cover member 22 which prevents reflection and can observe the image displayed on the display screen 21a of the display panel 21 satisfactorily. Further, the antireflection layer 22d may be formed only on the front side (observer side) glass sheet 22a.

  The luminous reflectance is the tristimulus chromaticity Y specified in JIS Z 8701 (1999). The chromaticity Y is reflected from the side of the viewer using a spectrophotometer manufactured by U-4100 Hitachi. The rate can be measured and obtained by calculation according to the JIS. At this time, the viewing angle was 10 °.

  The antireflection layer 22d is preferably provided by forming a film on the glass sheet 22a. For example, a dielectric multilayer film in which a low refractive index film having a refractive index lower than that of the glass sheet 22a, a low refractive index layer having a relatively low refractive index, and a high refractive index layer having a relatively high refractive index are alternately laminated. Is used. The antireflection layer 22d is formed by, for example, a sputtering method or a CVD method.

  The antireflection layer 22d may be formed by attaching a separate known antireflection film to the surface of the glass sheet 22a.

  An antifouling layer (not shown) may be formed on the surface side (observer side) of the glass sheet 22a. The antifouling layer preferably contains a fluorine-containing polymer containing silicon in the main chain. Examples of the fluorine-containing polymer include a polymer having —O—Si—O— units in the main chain and having a water-repellent functional group containing fluorine in the side chain. The fluorine-containing polymer can be synthesized, for example, by dehydrating condensation of silanol. When the antireflection layer 22d and the antifouling layer are formed on the surface side (observer side) of the glass sheet 22a, the antifouling layer is formed on the antireflection layer 22d.

  The cover member 22 is preferably provided apart from the display panel 21. Thereby, even if an impact is applied to the cover member 22 from the outside, the impact can be prevented from reaching the display panel 21, and the display panel 21 can be prevented from being damaged. In addition, since a space can be provided between the display panel 21 and the cover member 23, the heat dissipation of the display panel 21 can be favorably maintained when the airflow passes through the space.

  The separation distance t between the cover member 22 and the display panel 21 is preferably 1 to 10 mm, more preferably 1 to 5 mm, and further preferably 3 to 5 mm. Thereby, the visibility of the image displayed on the display screen 21a of the display panel 21 can be improved while maintaining the heat dissipation of the display panel 21. When a resin plate such as polycarbonate or acrylic is used alone as the cover member 22, the resin plate may be thermally deformed due to heat from the display panel 21, so the separation distance between the cover member 22 and the display panel 21 is increased. There is a possibility that the visibility of an image displayed on the display screen 21a of the display panel 21 may deteriorate. By using a glass resin laminate as the cover member 22 as in the present invention, the separation distance t can be shortened compared to a single resin plate, and the cover member 22 can be brought closer to the display panel 21. Thus, the visibility of the image displayed on the display screen 21a of the display panel 21 can be improved.

  As shown in FIG. 2, the vertical length d of the display unit 2 is preferably 30 to 80% of the height h of the self-supporting display device 1. In the case where a tempered glass plate is used as the cover member 22, the display unit 2 has a length d of 50% or less of the height h of the self-supporting display device 1 and is installed above the display device. In the self-supporting display device 1 of the present invention, since the glass resin laminate is used as the cover member 22, the length d of the display unit 2 is the height h of the self-supporting display device 1. Even in the case of 50% or less, it is possible to stably stand on its own. The vertical length d of the display unit 2 is more preferably 40 to 70% of the height h of the self-supporting display device 1.

  As shown in FIG. 6, the cover member 22 is preferably provided so as to be rotatable in the form of an open / close door. When a tempered glass plate is used as the cover member 22, when the cover member 22 is opened as shown in FIG. 6, the self-supporting display device 1 tends to become unstable, especially when the glass resin laminate is used. By using the cover member 22 according to the present invention constituted by a body, even when the cover member is in the opened state as shown in FIG. 6, the self-supporting display device 1 that is stable and independent is provided. be able to.

  The support part 3 supports the display part 2 from the downward direction, as shown in FIG. Since the self-supporting display device 1 is placed on the placement surface, the support unit 3 is provided so that the display unit 2 is positioned at substantially the same height as the eye level of the observer. In FIG. 1 and FIG. 2, the support unit 3 is configured as a separate body from the display unit 2, but is not limited to this form, and is configured as a housing in which the support unit 3 and the display unit 2 are integrated. You may do it. In this case, a portion located below the display unit 2 arranged in the housing corresponds to the support unit 3.

  Although the support part 3 is comprised as a box shape in FIG. 1, FIG. 2, it is not limited to this, You may be comprised as a frame.

  As shown in FIGS. 1 and 2, it is preferable to provide a protruding portion 31 that protrudes from the front surface of the self-supporting display device 1 on the contact side of the support portion 3 with the mounting surface. Thereby, the independence of the self-supporting display device 1 can be further stabilized. In FIG. 1 and FIG. 2, the self-supporting display device 1 that is installed close to a wall or the like (not shown) is displayed.

  As shown in FIG. 2, the protrusion width w of the protrusion 31 from the front surface of the self-supporting display device 1 is preferably 4% to 10% of the height h of the self-supporting display device 1. When a tempered glass plate is used as the cover member 22, the self-supporting display device 1 is likely to be unstable. Therefore, it is necessary to secure a large amount of protrusion of the protrusion 31. By using the resin laminate, the protruding width w of the protruding portion 31 can be suitably within the above-described range. The protrusion width w of the protrusion 31 from the front surface of the self-supporting display device 1 is more preferably 5% to 7% of the height h of the self-supporting display device 1.

  In FIG. 1 and FIG. 2, the protruding portion 31 is formed by causing a part of the supporting portion 3 to protrude from the front surface of the self-supporting display device 1. However, the present invention is not limited to this, and is separate from the supporting portion 3. A pedestal (not shown) may be newly provided, the pedestal may be configured to protrude from the front surface of the self-supporting display device 1, and the protruding portion 31 may be provided by mounting and fixing the support portion 3 on the pedestal. .

  Although the self-supporting display device 1 has been mainly described above, the cover member 22 (glass resin laminate) described above is preferably used even if the display device is a fixed display device (digital signage) fixedly installed on a pillar or wall. Can be used. As for the fixed type display device, the use of the cover member 22 described above has an advantage that installation work on a pillar, a wall, or the like becomes easier as compared with the case where tempered glass is used as the cover member. is there.

  INDUSTRIAL APPLICABILITY The present invention can be suitably used for self-supporting display devices mainly intended for installation in public places such as stations, such as digital signage and information guide boards.

DESCRIPTION OF SYMBOLS 1 Self-supporting display apparatus 2 Display part 21 Display panel 22 Cover member 22a Glass sheet 22b Transparent adhesive layer 22c Transparent resin layer 3 Support part 31 Protrusion part

Claims (4)

A self-supporting display device having a display unit and a support unit for supporting the display unit from below,
The display unit includes a display panel and a cover member that protects a display screen of the display panel,
The cover member is a glass resin laminate having a five-layer laminate structure composed of a glass sheet / transparent adhesive layer / transparent resin layer / transparent adhesive layer / glass sheet,
The glass sheet has a thickness of 1200 μm or less.   The self-supporting display device according to claim 1, wherein a length of the display unit in a vertical direction is 30 to 80% of a height of the self-supporting display device.   The self-supporting display device according to claim 1, wherein the cover member is rotatably provided in an opening / closing door shape.   The self-supporting display device according to claim 1, wherein the cover member is disposed apart from the display panel.