JP2014041210A - Reflection type display panel and manufacturing method of the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a reflection type display panel with good visibility that provides brighter and sharper color display, and a manufacturing method of the reflection type display panel.SOLUTION: A reflection type display panel has at least a substrate, a first electrode layer, a display layer, a second electrode layer, and an ink fixing layer in this order. The ink fixing layer has a plurality of coloring parts, which are arranged corresponding to drive units of the first electrode layer, and all or part of the plurality of coloring parts contain xanthene dye.

Description

  The present invention relates to a reflective display panel and a method for manufacturing the same.

  In recent years, liquid crystal display panels using a backlight as an image display panel have been mainstream, but the burden on the eyes is large and they are not suitable for applications that keep watching for a long time.

  As a display device with a small eye burden, a reflective display panel including an electrophoretic display layer between a pair of electrodes has been proposed. Since this electrophoretic display panel displays characters and images by reflected light, similar to the printed paper, it is suitable for work that keeps the screen looking for a long time with little burden on the eyes.

  At present, electrophoretic display panels are mainly two-color display mainly for monochrome display because of their structure. Recently, a color filter composed of pixels of three primary colors of red, green, and blue on an electrophoretic display layer. Has been proposed (see Patent Document 1).

JP 2003-161964 A JP 2011-227491 A

  On the other hand, a reflective display panel represented by an electrophoretic display panel uses external light for display, and thus has a limitation on the brightness (brightness) of the panel. In particular, red, green, When a color filter having a colored portion of the three primary colors of blue is provided for multicolor display, there is a problem that the luminance is significantly reduced by the color filter and visibility is deteriorated.

  In order to solve this problem, there is an attempt to secure visibility by arranging artificial illumination in the vicinity of the display device and increasing the amount of light in the outside world. However, such an attempt may result in a loss of the great feature of low power consumption of the electrophoretic display device that uses power only when changing the display of the electrophoretic display device.

  In addition, there is an attempt to improve visibility by increasing the brightness of the colored portion of the color filter. Usually, two types of dyes and pigments can be used as the colorant for the color filter. However, although the dye has excellent spectral characteristics, it has a disadvantage that it is slightly inferior in heat resistance and light resistance. Therefore, as a colorant for a color filter, a pigment having excellent heat resistance and light resistance is generally used, and it is difficult to use even a dye having excellent spectral characteristics.

  In addition, in the blue coloring composition for color filters, using a blue pigment and a xanthene dye as a colorant, and further adding an amine compound of phthalocyanine, when a color filter is obtained, high brightness and a wide color reproduction region, In addition, a color filter that can realize a high contrast ratio and has excellent heat resistance has been proposed (see Patent Document 2). However, in the same manner as described above, it is difficult to use a dye alone in a color filter such as a normal liquid crystal display panel.

  The present invention has been made in view of the above circumstances, and uses a xanthene dye having excellent color characteristics as a colorant in the production of a reflective display panel having a process with a relatively small heat and light load. An object of the present invention is to provide a reflective display panel with good visibility that enables brighter and more vivid color display.

  A first invention is a reflective display panel having at least a substrate, a first electrode layer, a display layer, a second electrode layer, and an ink fixing layer in this order, wherein the ink fixing layer has a plurality of colored portions. A reflective display panel, wherein the colored portion is disposed corresponding to a driving unit of the first electrode layer, and all or a part of the plurality of colored portions contains a xanthene dye. It is.

  According to a second invention, in the first invention, the xanthene dye is Acid Red 52, Acid Red 92, Acid Red 289, Acid Red 388, Basic Red 1, Basic Violet 10, Solvent Red 35, Solvent Red 36, Solvent. A reflective display panel comprising red 49, solvent red 109, solvent red 237, solvent red 246, solvent violet 2, or a mixture of at least two of these.

  According to a third invention, in the first or second invention, the colored portion contains at least a xanthene dye and a binder resin, and a ratio of the xanthene dye and the binder resin in the colored portion is a mass ratio. A reflection type display panel having a ratio of 1: 9 to 1: 1.

  According to a fourth invention, in any one of the first to third inventions, the area of the surface of the first electrode layer that contacts the display layer of the drive unit and the area of the surface that does not contact the ink fixing layer of each colored portion The reflective display panel is characterized in that the ratio is 10: 9 to 4: 1.

  A fifth invention is a method for producing a reflective display panel according to the first invention, wherein the colored portion is formed by an ink jet method.

  According to the present invention, it is possible to provide a reflective display panel with better visibility that enables bright and vivid color display with a display color composed of a colored portion containing the xanthene dye.

Sectional drawing of the electrophoretic display device which concerns on one Embodiment of this invention

  Hereinafter, embodiments of the present invention will be described in detail.

  FIG. 1 is a cross-sectional view of an electrophoretic display device that is a reflective display panel according to an embodiment of the present invention.

  In the electrophoretic display device shown in FIG. 1, an electrophoretic display layer (display layer) 13 is formed on a substrate 10 having a first electrode layer 11 on the surface via an adhesive layer 12. The first electrode layer 11 is connected to each switching element, and a positive and negative voltage can be applied between the first electrode layer 11 and the second electrode layer 14. The electrophoretic display layer 13 is obtained by fixing a microcapsule in which a dispersion medium in which an electrophoretic element is dispersed in a dispersion liquid is sealed with a binder resin.

  On the electrophoretic display layer 13, a second electrode layer 14, an ink fixing layer 15, and a protective film 17 are sequentially laminated. The ink fixing layer 15 has a plurality of colored portions 16 arranged corresponding to the drive unit of the first electrode layer 11. All or some of the plurality of colored portions 16 contain, for example, a xanthene dye.

  The electrophoretic display layer 13 is configured by fixing a microcapsule in which two types of particles having different electric polarities are dispersed in a transparent dispersion medium in a microcapsule shell with a binder resin.

  As two types of particles having different electric polarities, for example, there are combinations of black particles and white particles. As the black particles, in addition to inorganic pigments such as inorganic carbon, fine powders such as glass or resin, and composites thereof can be used. On the other hand, as white particles, known white inorganic pigments such as titanium oxide, silica, alumina, and zinc oxide, organic compounds such as vinyl acetate emulsion, and composites thereof can be used.

  The ink fixing layer 15 having the colored portion 16 can be formed by photolithography of a colored resist film as is done in a color filter for a liquid crystal display device, but an electrophoretic display as in the present embodiment. In the case of the ink fixing layer 15 having the coloring portion 16 used in the apparatus, the coloring portion 16 can be formed by forming the ink fixing layer 15 and applying a plurality of inks to the ink fixing layer 15. The ink fixing layer 15 is formed by applying an ink fixing layer forming coating liquid containing a resin.

  As the ink fixing layer 15, urethane resin, polyester, acrylic resin, vinyl alcohol resin, or the like can be used. In addition, the ink fixing layer 15 may contain a porous material such as synthetic silica or alumina in order to increase the absorbability of the ink solvent. The ink fixing layer 15 can be formed by a screen printing method, an offset printing method, a spin coating method, or a intermittent coating with a die if sheet processing is performed. If continuous processing is performed by roll-to-roll, the ink fixing layer 15 can be formed by general-purpose coating techniques such as die coating, comma coating, curtain coating, and gravure coating. In addition, the coating liquid for forming an ink fixing layer after coating is dried. As a drying method, heating, blowing, or the like can be used.

  As a method for applying ink to the ink fixing layer 15 according to the present embodiment, since a black matrix for dividing a drive unit is not formed, it is necessary to separately coat colors, so that a screen printing method, an offset printing method, an ink jet printing method is used. The method etc. can be used. In particular, since the alignment is easy and the productivity is high, it is preferable to form the colored portion 16 by ejecting ink to the ink fixing layer 15 using an ink jet printing method.

  As an apparatus used for the ink jet printing method, there are a piezo conversion method and a heat conversion method depending on a difference in an ink discharge method, and it is desirable to use a piezo conversion method device. Further, the ink atomization frequency of the ink jet apparatus is desirably about 5 to 100 kHz. Further, the nozzle diameter of the ink jet apparatus is desirably about 5 to 80 μm. In addition, it is preferable to use an inkjet apparatus in which a plurality of heads are arranged and about 60 to 500 nozzles are incorporated in one head.

  The ink for the colored portion 16 according to this embodiment is formed from a colorant, a solvent, a binder resin, and a dispersant.

  The xanthene dye as a colorant that can be preferably used in the present invention has a red or purple color, and has any form of an oil-soluble dye, an acid dye, a direct dye, and a basic dye.

  When red or purple is exhibited, oil-soluble dyes such as CI Solvent Red and CI Solvent Violet, basic dyes such as CI Basic Red and CI Basic Violet, and CI Acid red, C.I. Acid violet and other acidic dyes, CI Direct red, C.I. Direct violet and other direct dyes.

  Among the xanthene dyes, rhodamine dyes are preferable because they are excellent in color developability and resistance.

  Hereinafter, the form of the xanthene dye used in the present invention will be specifically described in detail.

  The oil-soluble dye of the xanthene dye will be described. Xanthene oil-soluble dyes include CI Solvent Red 35, CI Solvent Red 36, CI Solvent Red 42, CI Solvent Red 43, CI Solvent Red 44, and CI Solvent Red 44. I. Solvent Red 45, C. I. Solvent Red 46, C. I. Solvent Red 47, C. I. Solvent Red 48, C. I. Solvent Red 49, C. I. Solvent Red 72, C. I. Solvent Red 73, C.I. Solvent Red 109, C.I. Solvent Red 140, C.I. Solvent Red 141, C.I. Solvent Red 237, C.I. Solvent Red 246, C.I. Solvent Violet 2, CI Solvent Violet 10 and the like.

  Among these, C.I. Solvent Red 35, C.I. Solvent Red 36, C.I. Solvent Red 49, C.I. Solvent Red 109, C.I. Red 237, C.I. Solvent Red 246, and C.I. Solvent Violet 2 are more preferred.

  The basic dye of the xanthene dye will be described. Examples of xanthene-based basic dyes include CI Basic Red 1 (Rhodamine 6 GCP), 8 (Rhodamine G), and CI Basic Violet 10 (Rhodamine B). Of these, C.I. Basic Red 1 and C.I. Basic Violet 10 are preferably used in terms of excellent color developability.

  The acidic dye of the xanthene dye will be described. The acid dyes of the xanthene dyes include CI Acid Red 51 (erythrosin (edible red No. 3)), CI Acid Red 52 (acid rhodamine), CI Acid Red 87 (eosin G (edible G). Red 103)), CI Acid Red 92 (Acid Phloxin PB (Edible Red 104)), CI Acid Red 289, CI Acid Red 388, Rose Bengal B (Edible Red 5) Acid Rhodamine G and CI Acid Violet 9 are preferably used.

  Among these, in terms of heat resistance and light resistance, C. I. Acid Red 87, C. I. Acid Red 92, C. I. Acid Red 388, which is a xanthene acid dye, or C, which is a rhodamine acid dye, is used. It is more preferable to use I. Acid Red 52 (Acid Rhodamine), C. I. Acid Red 289, Acid Rhodamine G, and C. I. Acid Violet 9.

  As coloring materials for inks other than the xanthene dyes used in the present invention, all pigments can be used regardless of organic pigments, inorganic pigments, dyes and the like. Preferably, an organic pigment is used, and it is particularly preferable to use a pigment excellent in light resistance. Specifically, C.I. I. Pigment Red 9, 19, 38, 43, 97, 122, 123, 144, 149, 166, 168, 177, 179, 180, 192, 208, 215, 216, 217, 220, 223, 224, 226, 227, 228, 240, 254, Pigment Blue 15, 15: 3, 15: 6, 16, 22, 29, 60, 64, C.I. I. Pigment Green 7, 36, 56, C.I. I. Pigment Yellow 20, 24, 86, 81, 83, 93, 108, 109, 110, 117, 125, 137, 138, 139, 147, 148, 150, 153, 154, 166, 168, 185, C.I. I. Pigment Orange 36, 73, C.I. I. Pigment Violet 23 or the like can be used. Furthermore, in order to obtain a desired hue, two or more kinds of materials can be mixed and used.

  The solvent used in the ink of the present invention is preferably one having a surface tension of 35 mN / m or less and a boiling point of 130 ° C. or higher in consideration of suitability for ink jet printing. When the surface tension is 35 mN / m or more, the dot shape stability at the time of ink jet discharge is significantly adversely affected. When the boiling point is 130 ° C. or less, the drying property in the vicinity of the nozzle is remarkably increased. It tends to cause defects such as clogging.

  Specifically, 2-methoxyethanol, 2-ethoxyethanol, 2-butoxyethanol, 2-ethoxyethyl acetate, 2-butoxyethyl acetate, 2-methoxyethyl acetate, 2-ethoxyethyl ether, 2- (2-ethoxy Ethoxy) ethanol, 2- (2-butoxyethoxy) ethanol, 2- (2-ethoxyethoxy) ethyl acetate, 2- (2-butoxyethoxy) ethyl acetate, 2-phenoxyethanol, diethylene glycol dimethyl ether, etc. The solvent is not limited to these and can be preferably used as long as it satisfies the above-mentioned requirements. Two or more kinds of solvents may be mixed and used as necessary.

  Examples of the binder resin that can be used in the present invention include acrylic resins, novolac resins, melamine resins, and epoxy resins.

  As acrylic resins, (meth) acrylic acid, methyl (meth) acrylate, ethyl (meth) acrylate, propyl (meth) acrylate, butyl (meth) acrylate, benzyl (meth) acrylate, lauryl as monomers Alkyl (meth) acrylates such as (meth) acrylate, hydroxyethyl (meth) acrylate, hydroxypropyl (meth) acrylate, ethoxyethyl (meth) acrylate, glycidyl (meth) acrylate, cyclohexyl (meth) acrylate, isobornyl (meth) Polymers such as alicyclic (meth) acrylates such as acrylate and dicyclopentenyl (meth) acrylate are exemplified, but the invention is not limited thereto. These monomers can be used alone or in combination of two or more. Furthermore, compounds such as styrene, cyclohexylmaleimide, phenylmaleimide, cyclohexylmaleimide, phenylmaleimide, methylmaleimide, ethylmaleimide, n-butylmaleimide, and laurylmaleimide that can be copolymerized with these acrylates can also be copolymerized.

  In addition, an ethylenically unsaturated group can be added to the acrylic resin. Examples of the method for adding an ethylenically unsaturated group to an acrylic resin include a method for adding an ethylenically unsaturated group such as acrylic acid and a carboxylic acid-containing compound to an epoxy-containing resin such as glycidyl methacrylate, and a method for adding a carboxylic acid such as methacrylic acid. Examples include a method of adding an epoxy-containing acrylate such as glycidyl methacrylate to an acid-containing resin, and a method of adding an isocyanate group-containing acrylate such as methacryloyloxyethyl isocyanate to a hydroxyl group-containing resin such as hydroxy methacrylate. It is not limited to examples.

  Examples of novolak resins include phenol novolac epoxy resins and cresol novolac epoxy resins.

  Examples of the melamine resin include alkylated melamine resins (methylated melamine resin, butylated melamine resin, etc.), mixed etherified melamine resins, and the like, which may be a high condensation type or a low condensation type. Any of these may be used alone or in admixture of two or more. Moreover, an epoxy resin can also be mixed and used as needed.

  Examples of the epoxy resin include glycerol / polyglycidyl ether, trimethylolpropane / polyglycidyl ether, resorcin / diglycidyl ether, neopentyl glycol / diglycidyl ether, 1,6-hexanediol / diglycidyl ether, ethylene glycol (polyethylene). Glycol) and diglycidyl ether. Also about these, it can use individually or in mixture of 2 or more types.

  Further, the mass average molecular weight of the binder resin is preferably in the range of 500 to 10,000, and more preferably in the range of 500 to 8,000. When the mass average molecular weight of the binder resin exceeds 10,000, the fluidity of the ink is insufficient during the drying process of the colored portion 16, and the pattern flatness is inferior. Moreover, if the mass average molecular weight of the binder resin is less than 500, the required physical properties such as solvent resistance and heat resistance cannot be satisfied.

  The dispersant can be used to improve the dispersibility of the pigment in the solvent. As the dispersant, an ionic or nonionic surfactant can be used. Specific examples include sodium alkylbenzene sulfonate, poly fatty acid salts, fatty acid salt alkyl phosphates, tetraalkyl ammonium salts, polyoxyethylene alkyl ethers, and the like, and other examples include organic pigment derivatives and polyesters. One type of dispersant may be used alone, or two or more types of dispersants may be mixed and used as necessary.

  The viscosity of the ink in the present invention is preferably in the range of 1 to 20 mPa · s, and more preferably in the range of 5 to 15 mPa · s. When the viscosity of the ink exceeds 20 mPa · s, there is a tendency that the ink does not land at a predetermined position at the time of ink jet ejection, or a defect such as nozzle clogging. On the other hand, when the viscosity of the ink is less than 1 mPa · s, the ink tends to be scattered when ejected.

  Further, the ratio of the pigment or dye in the colored portion and the binder resin is preferably in the range of 1: 9 to 1: 1, and the fluidity of the ink is adjusted by changing the amount of resin in the ink, It is possible to improve density variation in one colored portion 16.

  Next, the operation principle of the electrophoretic display device shown in FIG. 1 will be described.

  When a voltage is applied to the first electrode layer 11, the electric field applied to the microcapsule moves. When the first electrode layer 11 is a positive electrode, the negatively charged particles in the microcapsule move to the first electrode layer 11 side, and the positively charged particles are on the second electrode layer 14 side. Move to. Similarly, when the first electrode layer 11 is a negative electrode, the positively charged particles in the microcapsule move to the first electrode layer 11 side, and the negatively charged particles are the second electrode. Move to the layer 14 side.

  For example, when the first electrode layer 11 is a negative electrode so that black particles are positively charged and white particles are negatively charged, the black particles are placed on the first electrode layer 11 side as shown in FIG. The white particles move to the second electrode layer 14 side. In this case, all the light is reflected by the display layer 11 having white particles on the surface, and the light transmitted through the ink fixing layer 15 having the colored portion 16 can be observed.

  Next, the color display of the electrophoretic display device according to the embodiment of the present invention based on the operation principle will be described. The electrophoretic display device has a colored portion 16 and a non-colored portion (transparent portion) disposed on the electrophoretic display layer 13 for monochrome display corresponding to the drive unit of the first electrode layer 11.

  When all the portions corresponding to the drive unit of the first electrode layer 11 of the electrophoretic display layer 13 are displayed in white, or when only the portion corresponding to the coloring portion 16 of the electrophoretic display layer 13 is displayed in white, coloring The hue of the portion 16 and the white or black color of the non-colored portion are mixed, a color similar to the hue of the colored portion 16 is displayed, and only the portion of the electrophoretic display layer 13 corresponding to the colored portion 16 is displayed in black. In this case, since only the light transmitted through the non-colored portion is reflected, white display is performed, and all the portions corresponding to the drive unit of the first electrode layer 11 of the electrophoretic display layer 13 are displayed in black. The light is not reflected and the display is black.

  At this time, the color combination of the colored portion 16 can be freely changed depending on the application. In the case of multi-color display, a combination of two colors such as red and cyan, magenta and green, yellow and blue, etc. that have a complementary color relationship can be used. Any combination of colors can be used as long as they are in a complementary color relationship that becomes white by color mixing. In general, full color display uses three colors of red, blue, and green, or three colors of cyan, magenta, and yellow. If it is the combination of the color which becomes, it will not specifically limit. In the case of monocolor display, a desired color such as red, blue, magenta or the like can be used. In the present invention, a combination including red and purple colors, which are hues of xanthene dyes, is more preferable.

  Further, the colored portions 16 arranged corresponding to the drive units of the first electrode layer 11 may be any isotropically divided arrangement, and are not particularly limited. In this case, the area ratio of the surface not contacting the ink fixing layer 15 of each colored portion 16 occupying the area of the surface contacting the display layer 13 of the driving unit of the first electrode layer 11 is 10: 9 to 4: 1. Is preferred. When the colored portion area ratio is small (the area ratio of the colored portion 16 is less than 25%), the vividness when displaying each color is inferior, and the contrast (darkness ratio) between white / black display and each colored display cannot be obtained. When the colored portion area ratio is large (over 90% in the colored portion 16 area ratio), the colored portions 16 in the ink jet method tend to come into contact with each other, which may cause defects such as color mixing.

[Example 1]
Examples of the present invention and comparative examples will be described below, but the present invention is not limited to these examples.

  Disperse titanium oxide powder (white particles) with an average particle diameter of 3 μm coated with a polyethylene resin and carbon black powder (black particles) with an average particle diameter of 4 μm surface-treated with alkyltrimethylammonium chloride in tetrachloroethylene. Obtained. In this case, the white particles are negatively charged and the black particles are positively charged.

  This dispersion was O / W emulsified, and microcapsules were formed by a complex coacervation method using gelatin-gum arabic, thereby encapsulating the dispersion in microcapsules. The microcapsules thus obtained were sieved, and the particle diameters were adjusted so that the ratio of microcapsules having an average particle diameter of 60 μm and a particle diameter of 50 to 70 μm was 50% or more.

  Next, an aqueous dispersion of microcapsules having a solid content of 40% by mass was prepared. This aqueous dispersion, a urethane binder with a solid content of 25% by mass (CP-7050, manufactured by Dainippon Ink Co., Ltd.), a surfactant, a thickener, and pure water are mixed to form an electrophoretic layer. A coating solution was prepared. This coating solution was applied onto a substrate 10 made of, for example, glass, on which a first electrode layer 11 made of ITO was formed, and an electrophoretic display layer 13 was formed.

  A second electrode layer 14, which is a transparent conductive layer made of ITO, is formed on the electrophoretic display layer 13, and a polyester resin-based receiving liquid NS-141LX (Takamatsu Yushi Co., Ltd.) is used on the electrode layer 14 using a comma coater. The ink fixing layer 15 having an average film thickness of 10 μm was formed by continuous coating.

  Next, a colorant dispersion was prepared. The pigments and dyes contained in the colorant used in the coloring part 16 are those shown in Table 1. In the formulation shown in Table 1, the pigment was sufficiently mixed and kneaded by bead mill dispersion to prepare a pigment dispersion. The dye was dissolved in a solvent to obtain a dispersion.

  To the dispersion thus obtained, melamine resin (MW-22, manufactured by Sanwa Chemical Co., Ltd.) as a binder resin and diethylene glycol monoethyl ether acetate as an organic solvent were added and stirred well. Inks A to C were prepared.

  Next, the ink fixing layer 15 formed on the electrophoretic display layer 13 is colored using an inkjet printing apparatus equipped with a 12 pl, 180 dpi (180 dots per 2.54 cm) head (manufactured by Seiko Instruments Inc.). Material inks A to C were applied in place. Then, the colored part 16 and the non-colored part were formed by drying in a hot air oven at 80 ° C. for 5 minutes.

  Finally, a protective film 17 was formed thereon to produce an electrophoretic display device for full color display using three colors of cyan, magenta, and yellow. As a result, when all of cyan, magenta, and yellow were displayed and displayed as white, a display with white balance was shown. In addition, when magenta and yellow are displayed and red is displayed, a highly visible display with fluorescence is shown.

[Example 2]
In the same manner as in Example 1, as shown in Table 3, an electrophoretic display device for multi-color display was produced using two color materials of xanthene dye and green pigment as magenta.

  As a result, when two colors of magenta and green were displayed and white display was performed, a display with a white balance was shown. In magenta display, a highly visible display having strong fluorescence was shown.

[Comparative Example 1]
In the same manner as in Example 1, as shown in Table 4, a full color display electrophoretic display device was produced using coloring materials of cyan pigment, magenta pigment, and yellow pigment.

  As a result, when all of cyan, magenta, and yellow were displayed and displayed as white, a display with white balance was shown. However, when magenta and yellow were displayed and red was displayed, a display with high visibility as in Example 1 was not obtained.

[Comparative Example 2]
In the same manner as in Example 1, an electrophoretic display device for multi-color display was manufactured using two color materials of magenta pigment and green pigment as shown in Table 5.

  As a result, when two colors of magenta and green are displayed and white display is performed, a display with a white balance is shown. However, at the time of magenta display, a display as highly visible as Example 2 was not obtained.

  The present invention is applicable to display devices such as electronic paper.

DESCRIPTION OF SYMBOLS 10 ... Board | substrate 11 ... 1st electrode layer 12 ... Adhesion layer 13 ... Electrophoretic display layer (display layer)
14 ... Second electrode layer 15 ... Ink fixing layer 16 ... Colored portion 17 ... Protective film

Claims (5)

A reflective display panel having at least a substrate, a first electrode layer, a display layer, a second electrode layer, and an ink fixing layer in this order,
The ink fixing layer has a plurality of colored portions;
The colored portion is arranged corresponding to the driving unit of the first electrode layer,
A reflective display panel, wherein all or some of the plurality of colored portions contain a xanthene dye.   The xanthene dyes are Acid Red 52, Acid Red 92, Acid Red 289, Acid Red 388, Basic Red 1, Basic Violet 10, Solvent Red 35, Solvent Red 36, Solvent Red 49, Solvent Red 109, Solvent Red 237, Solvent The reflective display panel according to claim 1, wherein the reflective display panel is made of red 246, solvent violet 2, or a mixture of at least two of them.   The colored portion contains at least a xanthene dye and a binder resin, and a ratio of the xanthene dye and the binder resin in the colored portion is 1: 9 to 1: 1 by mass ratio. Item 3. The reflective display panel according to Item 1 or 2.   The ratio of the area of the surface of the first electrode layer that contacts the display layer of the driving unit to the area of the surface that does not contact the ink fixing layer of each of the colored portions is 10: 9 to 4: 1. The reflection type display panel of any one of Claims 1 thru | or 3. It is a manufacturing method of the reflection type display panel of Claim 1, Comprising:
A method for producing a reflective display panel, wherein the colored portion is formed by an ink jet method.

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