JP3066905U - Display panel for lightning display - Google Patents

Abstract

PROBLEM TO BE SOLVED: To be able to mass-produce inexpensively which can be directly printed on a surface by inkjet printing, has high translucency and excellent water resistance, and can be suitably used both indoors and outdoors. It is an object of the present invention to provide a light-emitting display panel. The light-emitting display panel of the present invention includes a synthetic resin sheet having a light-transmitting property, and a coating layer containing an ink-absorbing resin applied to the surface of the synthetic resin sheet. Configuration.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a light-emitting display panel which is used for light-emitting displays such as advertisements and signs and can be directly subjected to ink-jet printing on its surface.

[0002]

[Prior art]

 2. Description of the Related Art In recent years, many electronic display boards have been installed indoors and outdoors as display means for attracting a person's eyes and attention. These electronic signboards are used as electronic signboards installed at railway stations and underground malls, and as electronic signboards for information signs and the like. For these electronic display panels, display panels having translucency and printed or pasted with characters or images such as guides on the surface are used. For this reason, various display panels having high translucency and durability have been developed. Japanese Patent Application Laid-Open No. H11-184416 (hereinafter referred to as "A") discloses a "display device" as a conventional display panel for electro-optical display. Hereinafter, a display device using a conventional lightning display panel will be described with reference to the drawings. FIG. 2 is an exploded perspective view of a display device using a conventional light-emitting display panel. In the figure, reference numeral 5 denotes a display device using a conventional light-emitting display panel, 6 denotes a light source for irradiating the display device 5 with light, and 7 denotes a light guide made of a transparent acrylic resin plate for introducing the light emitted from the light source 6. The light plates, 7a and 7b are printed on both sides of the light guide plate 7 in a dot printing of white or nearly transparent color for light reflection, and 8a and 8b are arranged adjacent to the light guide plate 7 and have characters and symbols for guidance. The printed or pasted display boards 9a, 9b and 9c are outer frames surrounding the sides of the display boards 8a and 8b other than the light source 6. In FIG. 2, the light source 6 indicates a virtual mounting position by a broken line. The dot printing 7a is not shown.

The operation of the conventional display device using the above-described display panel for electro-optical display will be described below. When the light source 6 is turned on, the irradiated light is incident on the light guide plate 7 and is incident on the display plates 8a and 8b. Since the light guide plate 7 and the display plates 8a and 8b are arranged adjacent to each other, the display plates 8a and 8b are irradiated with predetermined brightness. Here, since characters and symbols for guidance are printed or affixed on the display plates 8a and 8b, various types of guidance are displayed by the light incident on the light guide plate 7.

As another display panel, a display panel used by attaching a printed display body to the back surface of a polyethylene terephthalate resin sheet is known. This display plate is used for an electric light display by adhering a separately printed advertising matter, guidance, or the like to the back surface of a transparent sheet of polyethylene terephthalate.

[0005]

[Problems to be solved by the invention]

 However, the above-mentioned conventional display panel has the following problems. (1) The display plate disclosed in Japanese Patent Publication No. A is not cost-effective because a special ink and printing device must be used when printing directly on the display plate. When attaching to a display panel, there is a problem that the display panel is easily stained when attaching or detaching the display body, and the attaching operation requires time and labor. (2) A display plate having a printed display attached to the back surface of a polyethylene terephthalate resin sheet requires time and effort to attach a separately printed display, and is used in a state where the surface of the sheet is directly exposed to the outside air. In addition, it lacks water resistance to rainwater and the like, so that it has a problem that a waterproof device is required for outdoor use and the place of use is limited.

The present invention solves the above-mentioned conventional problems, and has a coating layer on the surface so that it can be directly ink-jet printed on the surface, and it is necessary to separately manufacture and paste a display body of a printed matter. The surface of the synthetic resin sheet is not directly exposed to the outside air, and its durability against ultraviolet rays and rainwater is improved and it has high translucency, making it suitable for indoor and outdoor use. It is an object of the present invention to provide an inexpensive and mass-producible light-emitting display panel that can be used for electronic devices.

[0007]

[Means for Solving the Problems]

 In order to solve the above-mentioned conventional problems, a light-emitting display panel of the present invention includes a light-transmitting synthetic resin sheet and a coating containing an ink-absorbing resin coated on the surface of the synthetic resin sheet. And a working layer. With this configuration, since the surface has a coating layer, ink jet printing can be performed directly on the surface, and there is no need to separately manufacture and paste a display body of the printed matter, thereby reducing the weight of the display panel and increasing the synthetic resin. The surface of the sheet is not directly exposed to the outside air, has improved durability against ultraviolet rays and rainwater, has high translucency, and is inexpensive and mass-produced lightning that can be used suitably both indoors and outdoors A display panel can be provided.

[0008]

[Embodiment of the invention]

 The display panel for an electro-optical display according to claim 1 of the present invention includes a light-transmitting synthetic resin sheet, a coating layer containing an ink-absorbing resin coated on the surface of the synthetic resin sheet, Is provided. With this configuration, the following operation is provided. (1) Since the surface of the synthetic resin sheet is treated with a coating layer, it is possible to apply inkjet printing directly to the sheet surface with a single output, and it is necessary to attach a separately printed display body. In addition, the weight of the display panel can be reduced, and the printing and the display panel are excellent in cost saving and work efficiency. (2) Since the surface of the synthetic resin sheet is not directly exposed to the outside air, the durability to ultraviolet rays and rainwater can be improved. (3) Since the adhesiveness between the synthetic resin sheet and the coating layer is excellent, it is possible to prevent the coating layer from peeling off from the synthetic resin sheet. (4) Since the ink penetrates directly into the coating layer, the printability is excellent. (5) When printing with an ink-jet printer, the coating layer has excellent ink absorbency, so that it is possible to print on the display plate at a high speed, improve productivity and workability, and be suitable for ink-jet printing. Can be used.

Here, the synthetic resin sheet is formed to have a thickness of 100 to 1000 μm, preferably 300 to 500 μm. As the thickness becomes thinner than 300 μm, the tensile strength and durability of the display panel tend to decrease. As the thickness becomes thicker than 500 μm, it becomes difficult to obtain the effect of diffusing irradiation light, and when setting it in a printing apparatus. Both are not preferred because the surface tends to be slippery due to the weight of the sheet itself. Further, as the thickness becomes thinner than 100 μm or thicker than 1000 μm, the above tendency becomes remarkable, which is not preferable.

[0010] The coating layer is formed by coating a coating material containing a mixture of silica, light-diffusing silica, porous silica, etc., a glycidyl compound or a derivative thereof in addition to an ink-absorbing resin. It is formed by coating the surface of a synthetic resin sheet by a known method such as a coaster method, a blade coater method, and an air knife coater method. Additives include inorganic pigments, water-soluble polymers, synthetic resin latex, organic solvent-soluble resins, dispersants, fluorescent dyes, pH adjusters, defoamers, lubricants, preservatives, surfactants Alternatively, an antistatic resin or the like may be added to the coating agent.

The content of the ink-absorbing resin contained in the coating agent is set to 15 to 90% by weight based on the total amount of the coating agent. As the content becomes lower than 15% by weight, the adhesiveness between the silica in the coating agent and the synthetic resin sheet tends to decrease. As the content becomes higher than 90% by weight, the color development of the ink and the coating layer Either of these is not preferred because the transparency tends to decrease.

According to a second aspect of the present invention, there is provided the display panel for an electric light display according to the first aspect, wherein the synthetic resin sheet is made of an acrylic resin, polyvinyl chloride, polystyrene, polycarbonate, acetyl cellulose, It has a structure composed of at least one of MBS resin, methacryl styrene copolymer, and polyethylene terephthalate. With this configuration, in addition to the function of the first aspect, the synthetic resin used has high translucency and excellent weather resistance, so that it can be suitably used for lightning display and outdoors.

Here, as the acrylic resin, polymers such as methyl ester, ethyl ester, n-propyl ester, isopropyl ester, and butyl ester of methacrylic acid or acrylic acid are used. Further, as the polyvinyl chloride, those formed and processed into a tarpaulin obtained by press-bonding a PVC sheet to an intermediate obtained by weaving a strong yarn, a flexible face sheet for illumination, and the like are preferably used. When tarpaulin is used, it can be used particularly suitably for electric light display because of its high transparency and excellent durability. When a flexible face sheet is used, it has high flexibility and excellent durability, so that it can be particularly suitably used for outdoor advertising. The synthetic resin sheet may be laminated in two or more layers. When used in a place having a large amount of ultraviolet rays, an acrylic resin, polycarbonate or the like which is hardly affected by ultraviolet rays laminated on the outside is preferably used.

According to a third aspect of the present invention, there is provided the display panel for an electro-optical display according to the first or second aspect, wherein the ink-absorbing resin is a water-absorbing polyurethane, a polyester emulsion, or a polyvinyl alcohol. And a configuration comprising at least one of a polyvinyl acetal acrylic copolymer. With this configuration, the following operation is obtained in addition to the operation of the first or second aspect. (1) Since the coating layer has an excellent ink absorption capacity, it is possible to prevent the outflow and bleeding of the ink and to improve the color development, clarity, and resolution of printing. (2) Since the ink-absorbing resin has both hydrophilicity and lipophilicity, both water-based and oil-based inks can be used, and the outflow and bleeding of the ink after printing can be prevented.

Here, as the water-absorbing polyurethane, a polyurethane obtained by an aliphatic reaction, which has a glycol derivative, an acrylamide, or an acryl art having a tertiary amino group in a molecule is used. As the physical properties, those having a water absorption of 150 to 2000 times that of a general polyurethane and dissolved in a solvent such as tetrahydrofuran, ethyl acetate, methylcellosolve, or cyclohexanone are preferably used. Further, several kinds of the above solvents may be used as a mixture, and the boiling point and the like can be adjusted by these solvents, so that the processability of the coating layer can be improved. Further, two or more ink absorbing resins may be appropriately mixed depending on the type of ink.

According to a fourth aspect of the present invention, there is provided an electronic display panel according to any one of the first to third aspects, wherein the coating layer has a thickness of 1 to 120 μm. The ink absorbing resin has a configuration in which the ink absorption rate is 150 to 2000 wt%. With this configuration, in addition to the function of any one of claims 1 to 3, the ink has excellent absorption and retention properties, so that characters and images can be clearly displayed and the durability of printed matter is excellent. Having.

Here, the thickness of the coating layer is 1 to 120 μm, preferably 10 to 90 μm. As the thickness becomes thinner than 10 μm, there is a tendency that the printed surface bleeds and the ink flows out and the ink flows out and bleeds. All of these are not preferred because they tend to be easy to perform. Further, as the thickness becomes thinner than 1 μm or thicker than 120 μm, the above tendency becomes remarkable, which is not preferable. Further, the ink absorption rate of the ink absorbing resin is set to 150 to 2000 wt%. As the ink absorption rate becomes lower than 150 wt%, a skin layer tends to be formed on the surface to reduce the amount of ink absorption. All of these are not preferred, as there is a tendency for outflow to occur.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings. Embodiment FIG. 1 is a cross-sectional view of a main part of a light-emitting display panel according to the present embodiment. In the drawing, reference numeral 1 denotes a light-emitting display panel in the present embodiment, 2 denotes a synthetic resin sheet which is a substrate of the light-emitting display panel 1, 3 denotes a coating layer formed on the surface of the synthetic resin sheet 2, and 4 denotes This is a printing surface which is a surface portion of the coating layer 3. In the first embodiment, as the synthetic resin sheet 2, a tarpaulin obtained by pressing a polyvinyl chloride sheet on both surfaces of an intermediate body in which 200 × 500 denier strong yarn is woven in a net shape is used as the coating layer 3. A coating agent containing a mixture of aliphatic polyurethane, polyglycidyl ethers and silica is applied to the surface of the synthetic resin sheet 2 by a blade coater method so as to have a thickness of 50 to 55 μm. Use.

As described above, since the display panel for electro-optical display according to the present embodiment is configured, the coating layer is provided on the surface of the synthetic resin sheet serving as the display panel. This eliminates the need for special and expensive inks and printers, and eliminates the need to manufacture a separately printed display body and attach it to the surface of the display panel. Further, since the synthetic resin sheet has high translucency, water resistance, and weather resistance, it can be suitably used for electric light display and outdoor advertising. Furthermore, since the coating layer contains an ink-absorbing resin, the coating layer is prevented from peeling off from the synthetic resin sheet, and characters and images are printed with good color and vividness. Bleeding is prevented.

[0020]

[Effect of the invention]

 As described above, according to the light-emitting display panel of the present invention, the following advantageous effects can be obtained. According to the invention of claim 1, (1) Since the coating layer is treated on the surface of the synthetic resin sheet, the ink jet printing can be directly performed on the surface of the sheet with a single output, and separately. It is possible to provide a print that can reduce the weight of the display board without the need to attach a display body printed on the display panel, and a display board for an electric light display excellent in cost saving and work efficiency of the display board. . (2) Since the surface of the synthetic resin sheet is not directly exposed to the outside air, it is possible to provide a versatile light-emitting display panel capable of improving durability against ultraviolet rays and rainwater. (3) To provide a durable light-emitting display panel capable of preventing the coating layer from peeling off from the synthetic resin sheet because of excellent adhesion between the synthetic resin sheet and the coating layer. Can be. (4) It is possible to provide a light-emitting display panel excellent in expressiveness of a printed matter in which ink can directly penetrate into a coating layer. (5) When printing with an ink jet printer, the coating layer has excellent ink absorbency, so that it is possible to print on the display plate at a high speed, improve productivity and workability, and be suitable for ink jet printing. It is possible to provide a light-emitting display panel that can be used.

According to the invention of claim 2, in addition to the effect of claim 1, the synthetic resin used has high translucency and excellent weather resistance, so that it is suitable for electric light display and outdoor advertising. It is possible to provide a light-emitting display panel which can be used and has excellent versatility.

According to the third aspect of the present invention, in addition to the effects of the first and second aspects, (1) since the coating layer has an excellent ink absorption capacity, it is possible to prevent the outflow and bleeding of the ink. At the same time, it is possible to provide a light-emitting display panel excellent in expressiveness of a printed matter, which can improve color development, sharpness, and resolution of printing. (2) Since the ink-absorbing resin has both hydrophilicity and lipophilicity, both water-based and oil-based inks can be used, and durability that can prevent the outflow or bleeding of ink after printing. It is possible to provide a light-emitting display panel excellent in the above.

According to the invention described in claim 4, in addition to the effect of any one of claims 1 to 3, the ink and the ink are excellent in absorbability and retention, so that characters and images can be clearly displayed. The present invention can provide a light-emitting display panel having excellent durability of printed matter.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a main part of a light-emitting display panel according to an embodiment of the present invention.

FIG. 2 is an exploded perspective view of a display device using a conventional lightning display panel.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Display panel for lightning display 2 Synthetic resin sheet 3 Coating layer 4 Printing surface 5 Display device 6 Light source 7 Light guide plate 7a, 7b Dot printing 8a, 8b Display plate 9a, 9b, 9c Outer frame

Claims (4)

[Utility model registration claims] 1. An electro-optical display comprising: a synthetic resin sheet having a light-transmitting property; and a coating layer containing an ink-absorbing resin applied to the surface of the synthetic resin sheet. Display board. 2. The synthetic resin sheet is made of an acrylic resin,
2. The display panel according to claim 1, wherein the display panel is made of at least one of polyvinyl chloride, polystyrene, polycarbonate, acetylcellulose, MBS resin, methacrylstyrene copolymer, and polyethylene terephthalate. 3. The ink absorbing resin according to claim 1, wherein the ink absorbing resin comprises at least one of water-absorbing polyurethane, polyester emulsion, polyvinyl alcohol, and polyvinyl acetal acrylic copolymer.
The display panel for an electric light display according to the above. 4. A method according to claim 1, wherein said coating layer has a thickness of 1 to 120 μm, and said ink absorbing resin has an ink absorptivity of 1
2. The composition according to claim 1, wherein the content is 50 to 2000 wt%.
4. The display panel for electro-optical display according to any one of the above items 1 to 3.