JP4554924B2 - EL intermediate sheet and light emission driving method thereof - Google Patents

Description

  The present invention relates to an EL intermediate sheet used for lighting sign advertisements and the like and a light emission driving method thereof.

  EL sheets are used in a wide range of applications including backlights such as lighting signs. A typical configuration thereof is shown in, for example, Patent Document 1, which will be described with reference to FIG. 7. A light emitting layer 32, an insulating layer 33, and a back electrode layer 34 are sequentially laminated on a transparent electrode film 31. Is formed.

  In the typical EL sheet as the first conventional example, the transparent electrode film 31 is an essential constituent member. However, since the transparent electrode film 31 is formed by depositing ITO (indium tin oxide) obtained by doping tin oxide with indium oxide on PET (polyethylene terephthalate) having moisture resistance, the transparent electrode film 1 Is generally expensive. Since the price of the EL sheet is proportional to the use area of the transparent electrode sheet 31, it is inevitable that the cost of a product that requires a large illumination area such as an illumination sign is high.

Therefore, Patent Document 2 proposes a technique for providing an EL sheet that can emit light without requiring an expensive transparent electrode film 31. The structure of the second conventional example will be described with reference to FIG. 8. The insulating sheet 35 serving as a base, the first electrodes 36 and the first electrodes 36 arranged alternately with a predetermined gap on the insulating sheet 35. Two electrodes 37, a dielectric layer 38 provided on the insulating sheet 35 so as to cover the first and second electrodes 36, 37, and a light emitter provided on the dielectric layer 38 The layer 39 and the transparent insulating layer 40 provided on the light emitting layer 39 are included.
Japanese Patent No. 2657167 JP 2001-52875 A

  However, even in the EL sheet which is an improved second conventional example, an expensive transparent electrode film is not required, but the electrodes 36 and 37 are formed by etching on the insulating sheet 35 or the electrode 36 is formed on the insulating sheet 35. , 37 need to be formed by screen printing or the like. However, when the electrodes 36 and 37 are formed by etching, the manufacturing cost becomes high. On the other hand, when the electrodes 36 and 37 are formed on the insulating sheet 35 by screen printing or the like. However, since the electrodes 36 and 37 are already arranged over the entire light emitting region of the EL sheet, there is a problem that the user cannot arbitrarily select the light emitting range of the EL sheet.

  An object of the present invention is to provide an EL intermediate sheet that does not require an expensive transparent electrode film and allows the user to arbitrarily select the light emission range of the EL sheet at a low cost.

  In order to solve the above problems, the EL intermediate sheet according to the present invention has an ink-receiving layer formed on one side of a light-transmitting substrate and a light-transmitting auxiliary electrode layer, a light-emitting layer, and a high dielectric on the other surface. The body layer is formed by sequentially laminating.

  In the EL intermediate sheet according to the present invention, the auxiliary electrode layer is composed of at least one of a conductive polymer or a polymer electrolyte.

  In the EL intermediate sheet according to the present invention, the auxiliary electrode layer is formed using a conductive ink obtained by adding at least one of the conductive polymer or the polymer electrolyte to an organic solvent. It is characterized by.

  The EL intermediate sheet according to the present invention includes a polyacetylene-based conductive polymer, a polythiophene-based conductive polymer, a polypyrrole-based conductive polymer, a polyaniline-based conductive polymer, a polyparaphenylene as the conductive polymer. Conductive polymer, polyphenylene sulfide conductive polymer, polyphenylene oxide conductive polymer, polyphenylene vinylene conductive polymer, polyacene conductive polymer, polyaniline conductive polymer, polypyrrole conductive polymer It is characterized by using at least one selected from.

  The EL intermediate sheet according to the present invention is characterized in that an anionic polymer electrolyte is used as the polymer electrolyte.

  In addition, the EL intermediate sheet according to the present invention includes, as an anionic polymer electrolyte, polyacrylic acid, polymethacrylic acid, polystyrene carboxylic acid, polyfluorocarbon carboxylic acid, polyvinyl sulfonic acid, polystyrene sulfonic acid, polyvinyl sulfuric acid, polyfluorocarbon sulfone. It is characterized by using at least one selected from an acid, a polyfluorocarbon carboxylate anion, and a polyfluorocarbon sulfonate anion.

  Further, the EL intermediate sheet emission driving method according to the present invention includes a pair of electrodes in which a color printing layer is formed on the ink receiving layer of the EL intermediate sheet, and a driving voltage is applied to the high dielectric layer side. The color print layer is displayed in a light-emitting manner by forming a drive electrode.

  According to these structures, an expensive transparent electrode film is not required and a low-cost EL intermediate sheet can be provided.

  In the EL intermediate sheet emission driving method according to the present invention, the color printing layer is formed using a color ink jet printer.

  The EL intermediate sheet emission driving method according to the present invention is characterized in that the pair of driving electrodes are comb-like electrodes or spiral electrodes extending in parallel and close to each other.

  The EL intermediate sheet emission driving method according to the present invention is characterized in that the pair of driving electrodes are formed using color ink of an ink jet printer.

  The EL intermediate sheet emission driving method according to the present invention is characterized in that the pair of driving electrodes are partially arranged to cause the color printing layer to emit light partially.

  According to these configurations, the user can form a drive electrode using a general-purpose ink jet printer without requiring a special printing machine such as a screen printing machine, so that the light emission range of the EL sheet can be arbitrarily selected and the electrode is formed at the same time. Can contribute to cost reduction.

  According to the present invention, an EL intermediate sheet that does not require an expensive transparent electrode film and allows the user to arbitrarily select the light emission range of the EL sheet can be provided at low cost.

  Hereinafter, the details of the present invention will be described with reference to preferred embodiments shown in the accompanying drawings.

  FIG. 1 is a cross-sectional view showing the steps of manufacturing an EL intermediate sheet step by step, and FIG. 1 (e) shows the basic configuration of the EL intermediate sheet. An ink receiving layer 2 is formed on one surface of the light transmissive substrate 1, and a light transmissive auxiliary electrode layer 3, a light emitting layer 4, and a high dielectric layer 5 are formed on the other surface of the light transmissive substrate 1. Are sequentially stacked.

  FIG. 1A shows a light transmissive substrate 1. Examples of the material of the light-transmitting substrate 1 include synthetic papers mainly made of polypropylene resin, as well as films such as PET (polyethylene terephthalate) and PC (polycarbonate). The synthetic paper preferably has a light transmittance of about 55 to 80% and is excellent in heat resistance and water resistance at 120 ° C. or higher. For example, “YUPO” (trade name of YUPO Corporation) ) Since the base material 1 which uses a polypropylene resin as a main raw material has a light disturbance function, it improves uniform surface emission characteristics. Furthermore, when the polypropylene resin base material 1 is manufactured, if an inorganic material of a white powder having a light diffusing effect is dispersed and kneaded in advance, the translucent and backlight can be used when used as an LCD backlight. The reflectance during non-lighting can be improved. Examples of the powder that enhances the light diffusing effect include inorganic materials such as ceramic powder, titanium oxide-coated mica having a particle size of 10 to 60 μm by coating titanium oxide on mica, and titanium oxide added to this if necessary There is something that consists of.

As shown in FIG. 1B, a light transmissive auxiliary electrode layer 2 is laminated on the other surface of the light transmissive substrate 1. The auxiliary electrode layer 2 is composed of at least one of a conductive polymer or a polymer electrolyte, and uses a conductive ink in which at least one of the conductive polymer or the polymer electrolyte is added to an organic solvent. Is formed.

  Examples of the conductive polymer material include polyacetylene-based conductive polymers, polythiophene-based conductive polymers, polypyrrole-based conductive polymers, polyaniline-based conductive polymers, polyparaphenylene-based conductive polymers, and polyphenylene sulfide-based materials. Examples include conductive polymers, polyphenylene oxide conductive polymers, polyphenylene vinylene conductive polymers, polyacene conductive polymers, polyaniline conductive polymers, polypyrrole conductive polymers, and the like, organic solvent materials As for, methyl ethyl ketone etc. are mainly mentioned.

  Examples of the polymer electrolyte material include anionic polymer electrolytes, specifically, polyacrylic acid, polymethacrylic acid, polystyrene carboxylic acid, polyfluorocarbon carboxylic acid, polyvinyl sulfonic acid, polystyrene sulfonic acid, Examples thereof include polyvinyl sulfate, polyfluorocarbon sulfonic acid, polyfluorocarbon carboxylic acid anion, and polyfluorocarbon sulfonate anion. The auxiliary electrode layer 3 is formed by kneading and dispersing the conductive polymer or polymer electrolyte material in an organic solvent.

  As shown in FIG. 1 (c), the light emitting layer 3 is prepared by mixing and stirring a phosphor using zinc sulfide (ZnS) doped with Cu as the phosphor particles 3a and stirring the phosphor. The auxiliary electrode layer 2 is laminated so as to cover it. As the binder, a fluorine binder obtained by dissolving a fluorine resin in methyl ethyl ketone as a solvent is used.

As shown in FIG. 1D, the high dielectric layer 4 is laminated on the light emitting layer 3. The high dielectric layer 4 is formed by dispersing high dielectric particles having a relative dielectric constant of 100 or more when a 1 V, 1 kHz AC voltage is applied, in a binder in order to increase the AC voltage applied to the light emitter 3a. is there. Here, barium titanate (BaTiO ₃ ) is employed as the material for the high dielectric particles, and a fluorine-based binder is used as the binder, as with the light emitting layer 3.

As shown in FIG. 1E, the ink receiving layer 5 is configured on one side of the light transmissive substrate 5. Examples of the material of the ink receiving layer 2 include a thermosetting hydrophilic resin, and examples thereof include a thermosetting acrylic resin and a urethane resin. The heat-curable acrylic resin is printed on the entire surface of the light-transmitting substrate 1 using a coater (roll coater) or the like, and then heated and dried to form the ink receiving layer 2. The ink receiving layer 5 is not limited to the thermosetting hydrophilic resin, and a hydrophilic resin that is allowed to stand after printing and is cured by natural drying may be used.
The above is the configuration of the EL intermediate sheet 6.

  Before explaining the manufacturing method of the EL intermediate sheet, a manufacturing apparatus 10a used for the manufacturing method will be described with reference to FIG. The EL sheet manufacturing apparatus 10a according to this example includes a roller 11a for supplying the roll body R1 of the light transmissive substrate 1, roll coaters 12, 13, and 14, heat drying apparatuses 16, 17, and 18, a roller 20a for feeding, It comprises a winding roller 21a. The roll coaters 12, 13, and 14 transfer the amount of ink transferred to the backup rolls 12a, 13a, and 14a of the roll body and the coating rolls 12b, 13b, and 14b, and the coating rolls 12b, 13b, and 14b in which high-precision grooves are processed. It comprises ink supply tanks 12c, 13c and 14c having a mechanism for controlling. The feeding roller 20a and the backup rolls 12a, 13a, and 14a are moved up and down in the directions of arrows A and B by an automatic lifting device (not shown).

  Heat curing devices 16, 17, and 18 provided downstream of the roll coaters 12, 13, and 14 are installed at a height that is a predetermined distance away from the table 16a, 17a, and 18a for the heat drying device. An infrared irradiation type equipped with infrared lamps 16c, 17c, 18c inside the protective covers 16b, 17b, 18b is used. However, the heat curing devices 16, 17, and 18 are not limited to those of the infrared irradiation type, and may be of an ultraviolet curing type in the case of an electrothermal type or an ultraviolet curing type, for example. Driving and stopping of the winding roller 21a are controlled in conjunction with the supply roller 11a, the backup rolls 12a, 13a, and 14a, the feed roller 20a, and the winding roller 21a.

  Next, a method for manufacturing an EL intermediate sheet using the manufacturing apparatus 10a will be described with reference to FIG.

  First, the roll body R1 around which the light transmissive substrate 1 is wound is set on the supply roller 11a. After the light transmissive substrate 1 is pulled out from the roll body R1 of the light transmissive substrate 1, the gap between the backup roll 12a and the coating roll 12b, the heating dryer table 16a, the backup roll 13a and the coating roll 13b And the heating roller table 17a, the gap between the backup roll 14a and the coating roll 14b, the heating and drying device table 18a, and the feed roller 20a in this order, set on the take-up roller 21a. Is done.

  Next, the process of forming the light transmissive auxiliary electrode layer 2 by the roll coater 12 on one surface of the light transmissive substrate 1 drawn from the roll body R1 will be described. The roll coater 12 has a roll body backup roll 12a, a coating roll 12b in which high-precision grooves are processed, and a mechanism for controlling the amount of the light-transmitting auxiliary electrode layer ink 2 ′ that transfers ink to the coating roll 12b. And an ink supply tank 12c. In the ink supply tank 12c, the groove of the coating roll 12b is filled with the light transmissive auxiliary electrode layer ink 2 ′, and then the light transmissive auxiliary electrode is interposed between the coating roll 12b and the light transmissive substrate 1 drawn from the roll body R1. The layer ink 2 ′ is transferred and printed as needed, and the auxiliary electrode layer 2 is formed on one side of the substrate 1.

  The light-transmitting substrate 1 on which the auxiliary electrode layer 2 is formed is extended by a predetermined length by being driven in conjunction with the backup rolls 12a, 13a, 14a and the feed roller 20a, and the auxiliary electrode formed in the previous step When the layer 2 reaches the position of the heat curing device 16, the drive of the backup rolls 12, 12a, 12b, the feeding roller 20a, and the winding roller 21a is stopped. During this stop period, the auxiliary electrode layer 2 is heated by the heat curing device 16 and dried. When the light transmissive substrate 1 is driven in conjunction with the backup rolls 12a, 13a, 14a and the feed roller 20a, the auxiliary electrode layer 2 described above is formed on the newly provided substrate 1 in the previous step. The printing by the roll coater 12 is performed in parallel. Then, when the time for sufficiently curing the auxiliary electrode layer 2 facing the heat curing device 16 has elapsed, the backup rolls 12a, 13a, 14a, the feed roller 20a, and the take-up roller 21a are restarted in conjunction with each other. The Thereby, the part of the light transmissive substrate 1 where the electrode layer is not formed is sent to the auxiliary electrode layer forming step, and the cured part of the electrode layer is sent to the next EL intermediate sheet. In such a state, the backup rolls 12a, 13a, 14a, the feeding roller 20a, and the take-up roller 21a are stopped in conjunction with each other.

  Next, the process of forming the light emitting layer 3 with the roll coater 13 on the light transmissive auxiliary electrode layer 2 formed in the above process will be described. The ink supply tank of the roll coater 13 is filled with the light emitting layer ink 3 ′. The light emitting layer ink 3 'is prepared by mixing and stirring a phosphor using zinc sulfide (ZnS) doped with Cu as the light emitting particles 3a and a binder. As the binder, a fluorine binder obtained by dissolving a fluorine resin in methyl ethyl ketone as a solvent is used.

  Next, the process of forming the light emitting layer 3 with the roll coater 13 on the formation surface of the light transmissive auxiliary electrode layer 2 will be described. The roll coater 13 includes a backup roll 13a as a roll body, a coating roll 13b in which a high-precision groove is processed, and an ink supply tank 13c having a mechanism for controlling the amount of the light emitting layer ink 3 'that transfers the ink to the coating roll 13b. It consists of. The ink supply tank 13c fills the groove of the coating roll 13b with the light emitting layer ink 3 ', and then the coating roll 13b causes the light emitting layer ink 3' to be transferred and printed on the auxiliary electrode layer 2 as needed to assist the light emitting layer 3. It is formed on the electrode layer 2.

  The light transmissive substrate 1 in which the light emitting layer 3 is formed on the auxiliary electrode layer 2 has a certain length by being driven in conjunction with the backup rolls 12a, 13a, 14a, the feeding roller 20a, and the winding roller 21a. The backup rolls 12, 12 a, 12 b, the feed roller 20 a, and the take-up roller 21 a are stopped at the point where the light emitting layer 3 that has been fed out and reached in the previous step reaches the position of the heat curing device 17. During this stop period, the light emitting layer 3 is heated by the heat curing device 17 and dried. When the light-transmitting substrate 1 having the light emitting layer 3 formed on the auxiliary electrode layer 2 is driven in conjunction with the backup rolls 12a, 13a, 14a, the feed roller 20a, and the take-up roller 21a, a pre-process Then, the above-described light emitting layer 3 is printed on the newly provided substrate 1 by the roll coater 13 in parallel. And when the time which the light emitting layer 3 facing the heat-curing apparatus 17 fully dries has passed, the backup rolls 12a, 13a, 14a, the feed roller 20a, and the take-up roller 21a are interlocked and restarted. .

  As a result, the portion of the light-transmitting substrate 1 where the light emitting layer is not formed is sent to the light emitting layer forming step, and the portion where the light emitting layer 3 has been dried is sent to the next high dielectric layer 4 forming step. In such a state, the backup rolls 12, 12a, 12b and the feeding roller 12c are stopped in conjunction with each other.

  Next, the process of forming the high dielectric layer 4 on the light emitting layer 3 by the roll coater 14 will be described. The roll coater 14 is an ink supply having a roll body backup roll 14a, a coating roll 14b with a high-precision groove processed, and a mechanism for controlling the amount of the high dielectric layer ink 4 'that transfers the ink to the coating roll 14b. It consists of a tank 14c. The groove of the coating roll 14b is filled with the high dielectric layer ink 4 'in the ink supply tank 14c, and then the high dielectric layer ink 4' is transferred and printed on the light emitting layer 3 as needed by the coating roll 14b. A layer 4 is formed on the light emitting layer 3.

  The light-transmitting substrate 1 on which the high dielectric layer 4 is formed is fed out by a predetermined length by being driven in conjunction with the backup rolls 12a, 13a, 14a, the feed roller 20a, and the take-up roller 21a. At the point where the high dielectric layer 4 formed in the process reaches the position of the heat curing device 18, the drive of the backup rolls 12, 12a, 12b, the feed roller 20a, and the take-up roller 21a is stopped. During this stop period, the high dielectric layer 4 is heated by the heat curing device 18 and dried. When the light-transmitting substrate 1 is driven in conjunction with the backup rolls 12a, 13a, 14a, the feeding roller 20a, and the take-up roller 21a, in the previous step, on the newly provided substrate 1 The above-described high dielectric layer 4 is simultaneously printed by the roll coater 18. When the time for sufficiently curing the high dielectric layer 4 facing the heat curing device 18 has elapsed, the backup rolls 12a, 13a, 14a, the feed roller 20a, and the take-up roller 21a are restarted in conjunction with each other. And it is wound up by the roller 21a for winding as the roll body R2.

  Next, a method for manufacturing the EL intermediate sheet 6 using the manufacturing apparatus 10b will be described with reference to FIG. The manufacturing apparatus 10b will be described with reference to FIG. 2B. In the EL sheet manufacturing apparatus 10b according to this example, the roll body R2 manufactured by the manufacturing apparatus 10a is set on the supply side, and the supply roller 11b is provided. , A roll coater 15, a heat drying device 19, a feeding roller 20b, and a winding roller 21b. The roll coater 15 includes a roll-up backup roll 15a, a coating roll 15b in which high-precision grooves are processed, and an ink supply tank 15c having a mechanism for controlling the amount of ink transferred to the coating roll 15c. The feeding roller 20b and the backup roll 15a are moved up and down in the directions of arrows A and B by an automatic lifting device (not shown).

  The heating device 19 provided downstream of the roll coater 15 is installed at a height that is a predetermined distance from the heating / drying device table 19a. As an example, infrared irradiation with an infrared lamp 19c provided inside the protective cover 19b is provided. The formula is used. However, the heating device 19 is not limited to this infrared irradiation type, and may be, for example, an electrothermal type. The winding roller 21b is controlled to be driven and stopped in conjunction with the supply roller 11b, the backup roll 15a, the feeding roller 20b, and the winding roller 21b.

First, the roll body R2 is set on the supply roller 11b. At that time, one side of the light-transmitting substrate 1, that is, the side on which the high dielectric layer 4 is not formed is printed by the roll coater 15. set. After the light transmissive substrate 1 is pulled out, it is set on the take-up roller 21b through the gap between the backup roll 15a and the coating roll 15b, the heating / drying apparatus table 19a, and the feeding roll 20b sequentially.
Next, the process of forming the ink receiving layer 5 by the roll coater 15 on one side of the light transmissive substrate 1 of the roll body R2 will be described.

  The roll coater 15 is an ink supply having a mechanism for controlling the amount of the ink receiving layer ink 5 ′ that transfers the ink to the backup roll 15 a of the roll body R 2, the coating roll 15 b in which high-precision grooves are processed, and the coating roll 15 b. It consists of a tank 15c. The ink receiving tank 15c is filled with the ink receiving layer ink 5 'in the groove of the coating roll 15b, and then the ink receiving layer ink 5' is transferred and printed onto the light-transmitting substrate 1 at any time by the coating roll 15b. A layer 5 is formed on the light transmissive substrate 1.

  The light-transmitting substrate 1 on which the ink receiving layer 5 is formed is fed out by a predetermined length by being driven in conjunction with the backup roll 15a, the feeding roller 20b, and the winding roller 21b, and is formed in the previous step. When the ink receiving layer 5 reaches the position of the heat curing device 19, the drive of the backup roll 15a, the feeding roller 20b, and the winding roller 21b is stopped. During this stop period, the ink receiving layer 5 is heated and cured by the heat curing device 19. In addition, when the light-transmitting substrate 1 is driven in conjunction with the backup roll 15a, the feeding roller 20b, and the winding roller 21b, in the previous step, the ink described above is applied on the newly provided substrate 1. Printing of the receiving layer 5 by the roll coater 15 is performed in parallel. When the time for sufficiently curing the ink receiving layer 5 positioned facing the heat curing device 18 has elapsed, the backup roll 15a, the feed roller 20b, and the take-up roller 21b are restarted in conjunction with each other for take-up. The EL intermediate sheet 6 is wound around the roller 21b as a roll R3.

  The above is the manufacturing process of the EL intermediate sheet 6.

  FIG. 3 is an enlarged cross-sectional view when the EL sheet is driven to emit light when the user actually uses the EL intermediate sheet 6. FIG. 3A shows an enlarged cross-sectional view when the color printing layer 7 is provided on the ink receiving layer 5 of the EL intermediate sheet 6. The color printing layer 5 is formed using an ink jet printer that discharges at least each of cyan, magenta, and yellow colors, and each color ink contains a fluorescent dye or fluorescent pigment of each color, and is light transmissive. Is used. As the fluorescent dye or fluorescent pigment of each color used in the ink of each color, various organic or inorganic pigments including those conventionally known can be used. Examples include phthalocyanine pigment (cyan), isoindolinone high pigment (yellow), quinacridone high pigment (magenta), anthraquinone pigment (magenta), dioxazine pigment (cyan), indigo pigment (cyan). Thioindigo pigments (magenta), metal oxides {iron oxide (magenta), cadmium oxide (yellow), chromium oxide (magenta), etc.}.

  FIG. 3B shows an enlarged cross-sectional view in which a pair of drive electrodes 8 are partially arranged on the high dielectric layer 4 of the EL intermediate sheet 6. The pair of electrodes 8a and 8b employs carbon black dispersed in black ink of an ink jet printer as a conductive substance. The pair of electrodes 8a and 8b is, for example, a comb electrode shown in FIG. 4 or a spiral electrode shown in FIG. 5, and a high dielectric material so that the electrode elements of the electrode 8a and the electrode 8b enter each other. On the layer 4, it arrange | positions in the position which carries out partial light emission. Note that the arrangement interval between the electrode 8a and the electrode 8b is desirably 0.3 mm or less in order to prevent a decrease in light emission luminance caused by a decrease in the driving voltage of the EL sheet.

  Before explaining the light emission driving method of the EL intermediate sheet 6, an apparatus that enables this light emission driving method will be described with reference to FIG. 6. The apparatus supplies the EL intermediate sheet 6 as a roll body R 3. The roller 11c for feed, the rollers 20c and 20d for feeding, the color inkjet printer 22, the cutter 23, and the cradle 24.

  The feed rollers 20c and 20d are moved up and down in the directions of arrows A and B by an automatic lifting device (not shown). The color inkjet printer (large color plotter) 22 is installed on the downstream side of the feeding roller 20c. The cutter 23 is installed on the downstream side of the roller 20d, and is driven up and down by a driving device (not shown). On the downstream side of the cutter 23, a cradle 24 for receiving a product (EL sheet) cut to a predetermined length by the cutter 23 is provided.

The supply roller 11c is controlled to be driven and stopped in conjunction with the color inkjet printer 22, the feeding rollers 20c and 20d, and the cutter 23.
The roll body around which the EL intermediate sheet 6 is wound is set on the supply roller 11c. At that time, the ink receiving layer 5 of the EL intermediate sheet 6 is set to be printed by the color inkjet printer 22. After the EL intermediate sheet 6 is pulled out, the sheet is set through the feeding roller 20c, the color inkjet printer 22, and the feeding roller 20d in order.

  Next, a process of forming the color printing layer 7 on the ink receiving layer 5 of the EL intermediate sheet 6 by the color ink jet printer 22 will be described. The EL intermediate sheet 6 on which the ink receiving layer 5 is formed is fed out by a predetermined length by driving the supply roller 11c and the feeding rollers 20c and 20d in conjunction with each other, and the color inkjet printer 22 is not shown. The print head operates and the color print layer 7 is formed. When the color print layer 7 is formed, the supply roller 11c and the feed rollers 20c and 20d are stopped in conjunction with each other. After the color print layer 7 is formed, the supply roller 11c and the feed rollers 20c and 20d are interlocked. And restarted.

  The EL intermediate sheet 6 on which the color printing layer 7 is formed is fed out by a predetermined length by driving the feeding rollers 20c and 20d, and the electrode-cured portion is fed into the next EL sheet cutting step. In such a state, the driving of the feeding rollers 20c and 20d is stopped. During the driving period of the feeding rollers 20c and 20d, the color printing layer 7 is formed in parallel by the color ink jet printer 22.

  A process of cutting the EL intermediate sheet 6 on which the color printing layer 7 is formed into a predetermined length will be described. After the pair of electrodes 9a and 9b is formed on the high dielectric layer 4 of the EL intermediate sheet 6, the feeding roller 11c and the feeding rollers 20c and 20d are rotated, so that the feeding rollers 20c and 20d The EL intermediate sheet 6 (the portion on which the color print layer 7 has been formed) sent in a fixed amount is sent through the cutter 23 so as to be cut by a predetermined length, and then cut by the cutter 23. The EL intermediate sheet 6 cut to a predetermined length is accumulated on the cradle 24. Then, a pair of drive electrodes 8 are partially arranged with black ink of an ink jet printer on the high dielectric layer 4 related to the EL intermediate sheet 6, an AC voltage is applied to the electrodes 8, and the color printing layer 7 is partially emitted.

  The above is the light emission driving method of the EL intermediate sheet 6.

  The supply form of the EL intermediate sheet 6 is not limited to a roll shape, but is cut to a required length and supplied to the user. A color printing layer is formed on the surface of the EL intermediate sheet 6 where the ink receiving layer 5 is formed by an inkjet printer. 7, a pair of drive electrodes 8 is partially arranged with black ink of a commercial ink jet printer on the surface of the EL intermediate sheet 6 where the high dielectric layer 4 is formed, an AC voltage is applied to the electrodes 8, and the color The print layer 7 may be configured to cause partial light emission.

  The drive electrode 8 is not limited to a method of being arranged by printing with an ink jet printer, and may be a method of arranging by screen printing or stencil printing. The electrode 8 may be arranged by a stencil printing machine, and the color of the ink is not limited to the above embodiment, and any ink having conductivity such as ink in which Au-Ag fine particles are diffused may be used.

(A), (b), (c), (d) is sectional drawing which shows the manufacturing process of EL intermediate sheet of this invention in steps. It is a figure which shows the manufacturing process of EL intermediate sheet of this invention. (A), (b) is sectional drawing which shows the light emission drive method of the EL intermediate sheet of this invention in steps. It is a top view which shows a pair of electrode of the EL sheet of this invention. It is a top view which shows the other shape of a pair of electrode of the EL sheet of this invention. It is a figure which shows the light emission drive method of the EL intermediate sheet of this invention. It is sectional drawing which shows a prior art example. It is sectional drawing which shows another prior art example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Light transmissive base material 2 Light transmissive auxiliary electrode layer 2 'Light transmissive auxiliary electrode layer ink
DESCRIPTION OF SYMBOLS 3 Light emitting layer 3 'Phosphor particle 4 Insulating layer 4' Insulating layer ink 5 Ink receiving layer 5 'Ink receiving layer ink 6 EL intermediate sheet 7 Color printing layer 8 One pair of electrodes 8a First electrode 8b Second electrode 10 EL Intermediate Sheet Manufacturing Apparatus 11a, 11b, 11c Supply Roller 12, 13, 14, 15 Roll Coater 12a, 13a, 14a, 15a Backup Roll 12b, 13b, 14b, 15b Coating Roll 12c, 13c, 14c, 15c Ink Supply tank 16, 17, 18, 19 Heat curing device 16a, 17a, 18a, 19a Heat curing device table 16b, 17b, 18b, 19b Protective cover 16c, 17c, 18c, 19c Infrared lamp 20a, 20b, 20c, 20d Roller for feeding 21a, 21b Roller for take-up 22 color inkjet printer 23 the cutter 24 cradle

Claims (8)

An ink receiving layer is formed on one side of the light transmissive substrate, and a light transmissive auxiliary electrode layer, a light emitting layer, and a high dielectric layer are sequentially laminated on the other surface of the light transmissive substrate to form an EL intermediate sheet. Forming, and
Printing a color printing layer on the ink receiving layer;
A step of partially printing and forming a pair of drive electrodes for causing the color print layer to emit light partially by applying a drive voltage on the high dielectric layer ;
After the step of forming the EL intermediate sheet, a step of printing a color printing layer on the ink receiving layer and a step of partially printing a pair of drive electrodes on the high dielectric layer are performed,
The method for producing an EL sheet, wherein the light transmissive auxiliary electrode layer is formed using a conductive ink in which at least one of a conductive polymer or a polymer electrolyte is added to an organic solvent. 2. The conductive polymer according to claim 1, wherein the conductive polymer is a polyacetylene conductive polymer, a polythiophene conductive polymer, a polypyrrole conductive polymer, a polyaniline conductive polymer, a polyparaphenylene conductive polymer, or polyphenylene. At least one selected from sulfide-based conductive polymers, polyphenylene oxide-based conductive polymers, polyphenylene vinylene-based conductive polymers, polyacene-based conductive polymers, polyaniline-based conductive polymers, and polypyrrole-based conductive polymers. A method for producing an EL sheet, characterized in that The method for producing an EL sheet according to claim 1, wherein an anionic polymer electrolyte is used as the polymer electrolyte. 4. The anionic polymer electrolyte according to claim 3, wherein polyacrylic acid, polymethacrylic acid, polystyrene carboxylic acid, polyfluorocarbon carboxylic acid, polyvinyl sulfonic acid, polystyrene sulfonic acid, polyvinyl sulfuric acid, polyfluorocarbon sulfonic acid, polyfluorocarbon carboxylic acid anion. A method for producing an EL sheet, wherein at least one selected from polyfluorocarbonsulfonic acid anions is used. According to claim 1, wherein the EL intermediate sheet is cut to a predetermined size having a cutting step to be supplied to the user, before Symbol ink-receiving layer formed by printing a color print layer on the step and the high dielectric layer A method of manufacturing an EL sheet, wherein the step of partially printing and forming a pair of drive electrodes is performed by a user who is supplied with the EL intermediate sheet . 2. The step of partially printing and forming a pair of drive electrodes on the high dielectric layer according to claim 1 is a step of forming comb-like electrodes or spiral electrodes extending in parallel and close to each other. A method for producing an EL sheet. 7. The method for manufacturing an EL sheet according to claim 1, wherein the step of printing and forming a color print layer on the ink receiving layer is a step of forming using a color ink jet printer. 7. The EL sheet according to claim 1, wherein the step of partially printing and forming the pair of drive electrodes on the high dielectric layer is a step of using a black ink of an ink jet printer. Manufacturing method.