JP2010122522A - Liquid crystal microcapsule laminate, liquid crystal microcapsule laminate substrate, and display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a display device having flexibility and bendability, preventing a short circuit between transparent electrodes or corrosion in a transparent electrode, and capable of reducing the cost of manufacturing. <P>SOLUTION: The display device 10 includes, from the side where a light source 30 is present as a backlight, a polarizing plate 11, a film substrate 12, a transparent electrode 13, an LCMC (liquid crystal microcapsule) layer 14, a transparent electrode 15, and a polarizing plate 16, successively formed. The LCMC layer 14 has such a structure that the LCMC 14a formed by coating a liquid crystal particle with a polymer film is adhered and fixed by a nonaqueous binder and the LCMC 14a is arranged into a plurality of layers. At least one in a charge ratio of a liquid crystal agent to an encapsulating agent to form the LCMC 14a, an average particle diameter of the LCMC 14a, thickness of the LCMC layer 14, and density of the LCMC 14a in the LCMC layer 14 is determined based on the optical characteristics. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a liquid crystal microcapsule laminate, a liquid crystal microcapsule laminate substrate, and a display device.

  Conventionally, as a display device including a liquid crystal microcapsule, for example, those disclosed in Patent Documents 1 to 3 are known.

  First, Patent Document 1 includes a water-soluble polymer polymer including a microcapsule in which liquid crystal is sealed between a transparent electrode provided on a glass substrate and a transparent electrode provided on the transparent substrate, and is colored. An image display device that performs color display by coloring a polymer in red, green, and blue with a material is shown.

  Next, Patent Document 2 has a configuration in which a plurality of single particle layers in which liquid crystal microcapsules are two-dimensionally aligned are laminated between two transparent electrodes, and the gap between liquid crystal microcapsules is gelatin and A liquid crystal display filled with gum arabic is shown.

  Next, Patent Document 3 discloses a first liquid crystal in which a pair of transparent substrates on which a transparent electrode and an alignment film are laminated are opposed to each other with a narrow space interposed therebetween, and a liquid crystal capsule in which a second liquid crystal is sealed is dispersed in the space. A liquid crystal display device is shown in which polarizing plates are arranged on both sides of a liquid crystal cell formed by injecting and sealing, and a voltage applied to a liquid crystal layer is controlled by a driving power source connected to a transparent electrode to perform a display operation. Yes.

  However, those shown in Patent Documents 1 to 3 have a problem that a short circuit between the transparent electrodes or corrosion of the transparent electrodes occurs because a water-soluble polymer material is used between the two transparent electrodes. .

  Moreover, since the thing shown by patent documents 1-3 uses the hard board | substrate, there existed a subject that a display apparatus with a softness | flexibility and a flexibility was not realizable.

  In addition, the structure disclosed in Patent Document 3 is a structure in which a liquid crystal capsule is injected into the liquid crystal, so that the structure is complicated and a liquid crystal sealing and rubbing process is required, which increases the manufacturing cost. There is a problem that transmitted light transmitted between liquid crystal capsules needs to be controlled by liquid crystal.

  On the other hand, a liquid crystal microcapsule formed on a flexible substrate (for example, see Patent Document 4) and a liquid crystal microcapsule formed on a single transparent substrate (for example, see Patent Document 5) are known. Yes.

  First, Patent Document 4 describes a liquid crystal microcapsule having a configuration in which a liquid crystal microcapsule is sandwiched between flexible substrates, and describes that a thin and foldable liquid crystal display device can be realized. However, Patent Document 4 does not specifically describe the configuration of the liquid crystal microcapsules, and the one described in Patent Document 4 cannot be realized as a liquid crystal display device.

Patent Document 5 describes a liquid crystal display device in which a thin film transistor, a signal wiring, a liquid crystal layer containing liquid crystal microcapsules, and the like are monolithically formed on a single transparent substrate. There is no specific description of how the capsule is configured, and the one described in Patent Document 5 cannot be realized as a liquid crystal display device.
JP-A-62-28712 JP-A-9-90321 JP-A-4-338923 JP 55-96922 A JP 2000-330130 A

  The present invention has been made in view of the circumstances as described above, has a flexibility and a flexibility, can prevent a short circuit between transparent electrodes and corrosion of the transparent electrode, and can reduce a manufacturing cost. An object is to provide a device, a liquid crystal microcapsule laminate capable of constituting the display device, and a liquid crystal microcapsule laminate substrate provided with the liquid crystal microcapsule laminate.

  The liquid crystal microcapsule laminate of the present invention comprises a liquid crystal microcapsule formed by setting a liquid crystal agent and an encapsulating agent for encapsulating and encapsulating the liquid crystal agent at a predetermined charging ratio, and the liquid crystal microcapsule. A liquid crystal microcapsule layer in which the liquid crystal microcapsules are arranged in a plurality of layers, and the liquid crystal microcapsule layer has a thickness of the liquid crystal microcapsule layer. When light is incident in the vertical direction, the charged ratio, the diameter of the liquid crystal microcapsule, the diameter of the liquid crystal microcapsule based on the optical characteristics of the scattered emitted light when the incident light is scattered and emitted in the liquid crystal microcapsule layer At least one of the thickness of the liquid crystal microcapsule layer and the density of the liquid crystal microcapsule in the liquid crystal microcapsule layer is It has a configuration and is formed is constant.

  With this configuration, the liquid crystal microcapsule laminate of the present invention includes a liquid crystal microcapsule layer tightly fixed with a non-aqueous fixing agent, and the liquid crystal microcapsule layer is formed between the transparent electrodes on the film substrate, It is possible to provide a display device that has flexibility and flexibility and can prevent a short circuit between transparent electrodes and corrosion of the transparent electrodes.

  Also, with this configuration, the liquid crystal microcapsule laminate of the present invention, unlike the conventional one, eliminates the need for an alignment film, an alignment process, a liquid crystal sealing material, a sealing process, and the like, thereby reducing manufacturing costs. be able to.

  Further, in the liquid crystal microcapsule laminate of the present invention, the fixing agent is predetermined over the entire thickness of the liquid crystal microcapsule layer for each predetermined region on the light emission surface from which the scattered emission light is emitted. It has the structure which is colored with a coloring material.

  With this configuration, the liquid crystal microcapsule laminate of the present invention has flexibility and flexibility due to the liquid crystal microcapsule layer formed between the transparent electrodes on the film substrate. It is possible to provide a display device capable of color display capable of preventing the corrosion of the material.

  In the liquid crystal microcapsule laminate of the present invention, the liquid crystal microcapsule is formed such that the charging ratio of the liquid crystal agent and the encapsulating agent ranges from 92: 8 to 75:25 by weight. It is preferable to have a certain configuration.

  Moreover, it is preferable that the liquid crystal microcapsule laminate of the present invention has a configuration in which the liquid crystal microcapsules are formed with an average particle diameter ranging from 1 to 10 micrometers.

  Moreover, it is preferable that the liquid crystal microcapsule laminate of the present invention has a configuration in which the liquid crystal microcapsule layer is formed with a thickness in the range of 3 micrometers to 20 micrometers.

  Further, in the liquid crystal microcapsule laminate of the present invention, the liquid crystal microcapsule layer has a ratio of the liquid crystal microcapsule in the mixture of the colorant and the liquid crystal microcapsule in the production process of 25 to 80% by weight. It is preferable that the liquid crystal microcapsule has a density corresponding to a range up to a percentage.

  Further, in the liquid crystal microcapsule laminate of the present invention, the weight of the fixing material in which the liquid crystal microcapsule layer occupies the total weight of the coloring material, the liquid crystal microcapsule, and the fixing material in the manufacturing process is 10 It is preferred to have a configuration that is formed in the range of weight percent to 50 weight percent.

  The liquid crystal microcapsule laminate substrate of the present invention includes a liquid crystal microcapsule laminate and a translucent film substrate provided with the liquid crystal microcapsule laminate.

  With this configuration, the liquid crystal microcapsule laminate substrate of the present invention can provide a display device that has flexibility and flexibility and can prevent short-circuiting between transparent electrodes and corrosion of the transparent electrodes.

  The display device according to the present invention includes a liquid crystal microcapsule laminate, and the liquid crystal microcapsule layer includes a light incident surface for entering light and a light emitting surface for emitting light, the light incident surface The first and second transparent electrodes provided on the side and the light emitting surface side, the first polarizing plate provided on the light incident surface side and transmitting only light oscillating in the first direction, A second polarizing plate that is provided on the light exit surface side and transmits only light that vibrates in a second direction orthogonal to the first direction; and provided on at least one of the light incident surface side and the light exit surface side And the liquid crystal microcapsule layer is provided between the first transparent electrode and the second transparent electrode when the light is incident from the light incident surface. Before a predetermined interelectrode voltage is not applied The scattered light emitted emitted from the light emitting surface side, and has a configuration wherein the one which does not emit the scattered light emitted from the light emitting surface side when a defined inter-electrode voltage is applied in advance.

  With this configuration, the display device of the present invention includes a plurality of liquid crystal microcapsule layers in which the liquid crystal microcapsules are closely fixed with a non-aqueous fixing agent, and the liquid crystal microcapsule layer is formed between the transparent electrodes on the film substrate. Therefore, it has flexibility and flexibility, and can prevent a short circuit between the transparent electrodes and corrosion of the transparent electrodes.

  Furthermore, the display device of the present invention has a configuration including a color filter colored with a predetermined coloring material for each predetermined region on the light emitting surface.

  With this configuration, the display device of the present invention can display a color image using a color filter.

  Furthermore, the display device according to the present invention includes a liquid crystal microcapsule laminate, and the liquid crystal microcapsule layer includes a light incident surface for entering light and a light emitting surface for emitting light, wherein the light First and second transparent electrodes provided on the incident surface side and the light emitting surface side, respectively, and a first polarizing plate provided on the light incident surface side and transmitting only light that vibrates in the first direction A second polarizing plate provided on the light emitting surface side and transmitting only light that vibrates in a second direction orthogonal to the first direction, and at least one of the light incident surface side and the light emitting surface side And the liquid crystal microcapsule layer is formed between the first transparent electrode and the second transparent electrode when the light is incident from the light incident surface. A predetermined interelectrode voltage is not applied between The scattered emission light is emitted from the light emission surface side, and when the predetermined interelectrode voltage is applied, the scattered emission light is not emitted from the light emission surface side. .

  With this configuration, the display device of the present invention includes a plurality of liquid crystal microcapsule layers in which the liquid crystal microcapsules are closely fixed with a non-aqueous fixing agent, and the liquid crystal microcapsule layer is formed between the transparent electrodes on the film substrate. Therefore, it has flexibility and flexibility, and can prevent a short circuit between the transparent electrodes and corrosion of the transparent electrodes.

  The present invention relates to a display device that has flexibility and flexibility, can prevent a short circuit between transparent electrodes and corrosion of the transparent electrodes, and can reduce manufacturing costs, and a liquid crystal microcapsule laminate that can constitute the display device The liquid crystal microcapsule laminate substrate provided with the liquid crystal microcapsule laminate can be provided.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following description, “micrometer” is referred to as “μm”, and “percent” is referred to as “%”.

(First embodiment)
First, the configuration of the display device according to the first embodiment of the present invention will be described with reference to FIG. FIG. 1 is a schematic cross-sectional view of a display device according to this embodiment.

  As shown in FIG. 1, the display device 10 according to the present embodiment displays a color image by receiving light from a light source 30 that is a backlight, and includes a polarizing plate 11 and a film substrate from the light source 30 side. 12, a transparent electrode 13, a liquid crystal microcapsule (hereinafter referred to as “LCMC”) layer 14, a transparent electrode 15, and a polarizing plate 16 are sequentially formed. In the following description, the surface of the LCMC layer 14 on which the transparent electrode 13 is formed is referred to as a light incident surface, and the surface of the LCMC layer 14 on which the transparent electrode 15 is formed is referred to as a light emitting surface.

  The polarizing plate 11 is provided on the light incident surface side of the LCMC layer 14 and transmits only light that vibrates in the first direction out of light from the light source 30. The polarizing plate 16 is provided on the light emitting surface side of the LCMC layer 14 and transmits only light that vibrates in a second direction orthogonal to the first direction. The polarizing plates 11 and 16 constitute the first and second polarizing plates according to the present invention, respectively.

  The film substrate 12 is composed of a flexible film-like substrate having translucency and flexibility. Furthermore, the film substrate 12 is preferably made of a material having optical isotropy, and examples thereof include a TAC (Triacetylcellulose) film and a polycarbonate film.

  The transparent electrodes 13 and 15 are made of, for example, an inorganic transparent electrode such as ITO (Indium Tin Oxide) or an organic conductive film such as PEDT / PSS (Polyethylene Dioxythiophence polystyrene sulphonate). Further, the transparent electrodes 13 and 15 are connected to a power source (not shown), and a predetermined voltage (hereinafter referred to as “interelectrode voltage”) is applied to the LCMC layer 14 for each pixel. Specifically, for example, the transparent electrode 13 includes a pixel electrode constituting a plurality of pixels arranged in a matrix and a TFT (Thin Film Transistor) formed for each pixel, and the transparent electrode 15 is a solid electrode. It is comprised by the solid electrode formed in the shape. The transparent electrodes 13 and 15 constitute the first and second transparent electrodes according to the present invention, respectively.

  The LCMC layer 14 has a configuration in which, for example, LCMCs 14a formed by covering nematic liquid crystal particles with a polymer film are closely fixed by a non-aqueous binder (fixing agent), and the LCMCs 14a are arranged in a plurality of layers. The non-aqueous binder includes a coloring material for coloring a predetermined color, for example, red, green and blue pigments. As a result, the LCMC layer 14 includes the red ink 14b, the green ink 14c, and the blue ink 14d.

  The liquid crystal particles contained in the LCMC 14a are randomly oriented in the LCMC 14a when a predetermined inter-electrode voltage is not applied, and the orientation in the LCMC 14a is an electric field when a predetermined inter-electrode voltage is applied. It becomes the same as the direction of. Therefore, the LCMC layer 14 has a state in which the incident light is scattered and the scattered light is emitted and a state in which the incident light is projected by the optical shutter effect of the liquid crystal particles contained in the LCMC 14a. The LCMC layer 14 constitutes a liquid crystal microcapsule laminate (hereinafter referred to as “LCMC laminate”) according to the present invention.

  In order to form the LCMC layer 14, the charging ratio of the liquid crystal agent and the encapsulating agent for forming the LCMC 14 a included in the LCMC layer 14, the average particle diameter of the LCMC 14 a, the thickness of the LCMC layer 14, and the LCMC 14 a in the LCMC layer 14 At least one of the densities is set based on the optical characteristics. The ratio of the pigment of each color in the mixture of the pigment of each color and the LCMC 14a contained in the non-aqueous binder and the ratio of the weight of the binder in the total weight of the pigment, LCMC 14a and the binder are also set based on the optical characteristics. It has become so.

  Here, the optical characteristics are the brightness, hue, saturation, contrast, etc. of the scattered outgoing light emitted from the light exit surface of the LCMC layer 14 when light is incident from the light entrance surface of the LCMC layer 14, and as an optical shutter. The characteristics of the LCMC layer 14 such as the responsiveness to the inter-electrode voltage and the optical shutter effect of the LCMC layer 14 are related to the image quality of the displayed image.

  As described above, the LCMC layer 14 is composed of a plurality of layers for the following reason. In other words, when the LCMC layer 14 is composed of a single LCMC 14a, transmitted light that passes between adjacent LCMCs 14a is generated, so that light leaks from the exit surface even when the optical shutter in the LCMC 14a is closed. Because.

  In the LCMC laminate in this embodiment, for example, LCMCs 14a having an average particle diameter of about 2 μm are closely adhered to and overlapped with each other by an LCMC layer 14 having a thickness of about 5 μm to 10 μm. Although it transmits light, the light does not leak from between adjacent LCMCs 14a as in the case of a single layer, and when it is desired to block the incident light from the light source 30 (screen display off), the LCMC 14a alone can block the incident light. It has become. Specifically, the LCMC laminate in the present embodiment has a configuration as shown in FIG. FIG. 2 is an electron micrograph of the LCMC laminate in the present embodiment. FIG. 2 shows an LCMC laminate having a thickness of about 10 μm. In addition, the liquid crystal microcapsule laminate substrate according to the present invention is obtained by forming an LCMC laminate on a light-transmitting film substrate.

  Next, the operation principle of the display device 10 according to the present embodiment will be described with reference to FIG. 3A and 3B are diagrams conceptually showing the operation principle of the conventional typical liquid crystal display device 100 and the display device 10 in the present embodiment, respectively, and the upper row displays an image, respectively. The lower row shows a state where no image is displayed. For easy understanding, in FIG. 3B, the LCMC layer 14 is composed of a single LCMC 14a, and the liquid crystal particles and color ink in the LCMC 14a are not shown in the upper part of the figure.

  First, as shown in FIG. 3A, the conventional liquid crystal display device 100 has a polarizing plate 102, a glass substrate 103, a transparent electrode 104, an alignment film 105, a liquid crystal layer 106, an alignment from the light source 101 side as a backlight. A film 107, a transparent electrode 108, a color filter 109, a glass substrate 110, and a polarizing plate 111 are provided. Here, the light transmitting directions between the polarizing plate 102 and the polarizing plate 111 are orthogonal to each other, the alignment directions between the alignment film 105 and the alignment film 107 are orthogonal to each other, and the liquid crystal layer 106 is twisted nematic. It has a configuration with a liquid crystal. In the conventional liquid crystal display device 100, a light diffusing sheet is provided between the light source 101 and the polarizing plate 102 so that the light emitted from the light source 101 enters the liquid crystal layer 106 almost uniformly, so as to further improve the luminance. Generally, a prism sheet is provided.

  In the conventional liquid crystal display device 100, as shown in the upper part of FIG. 3A, the conventional liquid crystal display device 100 emits light from the light source 101 when no interelectrode voltage is applied between the transparent electrode 104 and the transparent electrode. Passes through the polarizing plate 102 to become linearly polarized light, and then travels along the twist of the liquid crystal particles 106a of the liquid crystal layer 106, and is emitted from the polarizing plate 111 as color light by the color filter 109. Reach the eyes.

  On the other hand, in the conventional liquid crystal display device 100, when a predetermined interelectrode voltage is applied, the longitudinal direction of the liquid crystal particles 106a of the liquid crystal layer 106 is parallel to the direction of the electric field, as shown in the lower part of FIG. Therefore, the light from the light source 101 cannot pass through the polarizing plate 111 and does not reach the eyes of the viewer.

  Therefore, in the conventional device, by applying an inter-electrode voltage for each pixel, the viewer is directly viewing the light from the light source 101 (the state of viewing the light source 101 itself) and the viewer is the light source. An image can be displayed in combination with a state where the light 101 cannot be seen.

  Next, in the display device 10 according to the present embodiment, when no interelectrode voltage is applied between the transparent electrode 13 and the transparent electrode 15 as shown in the upper part of FIG. Passes through the polarizing plate 11 and becomes linearly polarized light, and then enters the incident surface of the LCMC layer 14. Here, since the liquid crystal in the LCMC 14a is randomly oriented, incident light causes light scattering in each LCMC 14a, and this scattered light passes through each color ink to become color light, and a part of the light from the polarizing plate 16 It exits and reaches the eyes of the viewer.

  On the other hand, in the display device 10 according to the present embodiment, when a predetermined interelectrode voltage is applied, as shown in the lower part of FIG. 3B, the liquid crystal particles 14e in the LCMC 14a have the longitudinal direction as the electric field direction. Since they are arranged in parallel, the light from the light source 30 does not scatter in each LCMC 14a, and therefore cannot pass through the polarizing plate 16, and does not reach the eyes of the viewer.

  Therefore, the display device 10 according to the present embodiment applies a voltage between the electrodes for each pixel so that the viewer sees the scattered light from the LCMC layer 14 (the state where the LCMC layer 14 itself is seen). ) And a state in which the viewer cannot see the scattered light from the LCMC layer 14, and an image can be displayed. That is, unlike the conventional display device 10 according to the present embodiment, the display device 10 does not directly show the light of the light source 30 to the viewer, but shows the scattered light from the LCMC layer 14. In other words, the display device 10 according to the present embodiment has both a light diffusion sheet and a prism sheet that are conventionally used for diffusing incident light and improving luminance, and an optical shutter that transmits or blocks incident light. It can be said that it is a thing.

  With the above-described configuration, the display device 10 according to the present embodiment can improve the luminance by light scattering generated in the LCMC layer 14 and moves the light source to the viewer side compared to the conventional one, so that the field of view You can widen the corners. In addition, unlike the conventional display device 10 according to the present embodiment, an alignment film, an alignment process, a liquid crystal sealing material, a sealing process, and the like are not required, so that the manufacturing cost can be reduced.

  Next, a specific example of the display device 10 in the present embodiment will be given and the manufacturing process will be described. FIG. 4 is a flowchart showing an outline of the manufacturing process of the display device 10. In addition, the material, the manufacturing method, etc. which were described below are examples, and this invention is not limited to these.

[Liquid crystal microencapsulation (step S11)]
As the microencapsulation method, a conventionally known method such as a coacervation method, an interfacial polymerization method, an “in situ” polymerization method, or the like can be used. Here, the “in situ” polymerization method will be described as an example.

  Emulsified while adding liquid crystal material little by little to styrene maleic anhydride hydrolyzate as an emulsifier. To this emulsion, a mixture of melamine prepolymer and distilled water (encapsulating agent) was added and heated with stirring. Return to room temperature later. As a result, an LCMC slurry is produced.

  In this process, it is possible to appropriately set the weight ratio of the liquid crystal agent and the encapsulating agent (hereinafter simply referred to as “encapsulated preparation ratio”) and the average particle diameter of the capsule to ensure strength in the manufacturing process. This is important for obtaining desired optical characteristics as a display device. These will be described below based on the results of trial production. Here, the average particle diameter means the volume average particle diameter. When the encapsulation preparation ratio is expressed as, for example, 80 to 20, it indicates that the liquid crystal agent is 80% by weight and the encapsulating agent (film agent) is 20% by weight. For example, when the encapsulation preparation ratio is expressed as 80 to 20 or more, the encapsulation preparation ratio in which the encapsulating agent is 20% by weight or more is shown.

(1) Encapsulation preparation ratio According to the results of the trial production, even if the encapsulating agent is increased, the capsule membrane does not increase accordingly, and if the encapsulation preparation ratio is 75:25 or more, aggregation (aggregation) is caused. It has been found that the encapsulation ratio of about 75 to 25 is the limit of microencapsulation. It was also found that when the encapsulating agent was increased, the proportion of liquid crystal decreased, and a sufficient optical shutter effect could not be obtained. The evaluation criteria for the optical shutter effect in the present embodiment will be described later.

  On the other hand, when the encapsulation preparation ratio is 95: 5, the durability of the capsule membrane cannot be obtained in the cleaning process described later, and the capsule membrane is partially broken by the physical force during the cleaning, and the liquid residue is seen in the cleaning residual liquid. It was. In addition, when the encapsulated preparation ratio was 92: 8 and 85:15, the capsule film was not broken in the cleaning process, and a good optical shutter effect was obtained. The average particle size of LCMC formed with an encapsulation charge ratio of 85:15 was about 2.2 μm.

  From the above results, in the display device 10 according to the present embodiment, the encapsulation preparation ratio is preferably in the range from about 92 to 8 to about 75 to 25. In consideration of optical characteristics and manufacturing variations, the capsules The chemical preparation ratio is particularly preferably in the range of about 90:10 to about 80:20.

  In the above-described Patent Documents 1 and 2, the material remaining without being a capsule film in the manufacturing process becomes a binder during dehydration drying, and aggregation of the capsules occurs. Although there has been a problem that display unevenness occurs in the display image, the display device 10 according to the present embodiment can prevent display unevenness by setting the encapsulation preparation ratio as described above.

(2) Average particle diameter of capsules First, the encapsulation is performed as described above with reference to the encapsulation preparation ratio of 85:15 (film agent 15%), which gives the liquid crystal capsules having the average particle diameter of 2.2 μm. The particle diameter (hereinafter referred to as “minimum average particle diameter”) corresponding to an encapsulated charging ratio of 95 to 5 (film agent 5%) is calculated.

The amount of capsule membrane agent at an average particle size of 2.2 μm is represented by V _2.2 , the outer surface area of the particle is represented by S _2.2 , the amount of membrane agent at the minimum average particle size is Vx, and the radius of the particle is r The outer surface area is represented as Sx. Since the capsule film thickness d is about 0.1 μm, assuming that the outer surface area and the inner surface area of the capsule film are equal, V _2.2 and Vx are as follows using the outer surface areas S _2.2 and Sx, respectively. Can be expressed approximately.

_V2.2 = _S2.2 * d ... encapsulating agent = 15%
Vx = Sx × d ... Encapsulating agent = 5%

Therefore, the following equation holds.
Vx / V _2.2 = (4πr ² ) d / (4π (2.2 / 2) ² ) d = 5/15
From the above equation, r = 0.635 is obtained, 2r = 1.27, and the minimum average particle size is about 1.27 μm.

  Next, a trial experiment was conducted to obtain the maximum average particle size. A polyester film (thickness: 160 μm) on which ITO was vapor-deposited was prepared as a transparent electrode, and 15 μm of LCMC having a different average particle diameter was applied onto the transparent electrode and cured with ultraviolet rays. The LCMC coated film was sandwiched between polarizing plates, and the average particle size and the degree of light scattering were compared on the backlight. The average particle diameter of the used LCMC is 1.5 μm, 2.2 μm, 4 μm, 8 μm, 10 μm, and 12 μm. As a result of this experiment, it was found that when the average particle diameter of LCMC is 12 μm, streaks occur on the coated surface, which is not preferable as a display device.

  From the above results, the average particle size of the capsule is preferably in the range of about 1 μm to about 10 μm, and in consideration of optical characteristics and manufacturing variations, it is particularly in the range of about 2 μm to about 8 μm. preferable.

[Washing and drying (step S12)]
Next, the LCMC slurry obtained in step S11 is washed and dried. For example, a mixture of isopropyl alcohol and water is added to the LCMC slurry while stirring, and then subjected to a centrifugal separation process. The supernatant after centrifugation is discarded and washed again with isopropyl alcohol. The supernatant is discarded and the precipitate is collected, and the precipitate is dried with a vacuum dryer to obtain LCMC powder.

[Color ink (Step S13)]
First, a resist for each color pigment and a non-aqueous resin as a binder are prepared as red, green, and blue dyes, respectively. Next, the pigment and the non-aqueous resin and the LCMC powder obtained in step S12 are kneaded with an ink spatula for each pigment. As the non-aqueous resin, for example, an acrylate monomer, a silicon acrylic oligomer, a polyester acrylic oligomer, a urethane acrylic oligomer, or the like is preferably used. In view of handling in manufacturing, it is preferable to use an ultraviolet curable non-aqueous resin.

  Here, the blending ratio (weight ratio) of the pigments of red, green, and blue, LCMC, and binder will be described.

(1) Ratio of pigment of each color and LCMC First, a prototype was manufactured, and the ratio of pigment of each color and LCMC was determined. The results are shown in Table 1. In this examination, LCMC having an average particle diameter of 4.2 μm was used. The thickness of the LCMC laminate (hereinafter referred to as “laminate thickness”) was 7 μm for Formulations A to E, 12 μm for Formulation F, and 20 μm for Formulations G and H.

  From the examination results of the prototypes of Formulations A to C shown in Table 1, it was found that when the amount of the pigment with respect to LCMC increases, the optical shutter effect due to ON / OFF of the voltage between electrodes cannot be sufficiently obtained. Specifically, even when an inter-electrode voltage is applied, if the color of the pigment is easily seen on the light emitting surface side (hereinafter referred to as “image display surface”) for displaying an image and the image display surface is black. The ratio of pigment to LCMC was found to be preferably lower than that of Formulation C.

  Then, the thing of the mixing | blending D and E shown in Table 1 was made as an experiment. As a result, the product of Formulation D could be handled without any problem in the production process, and the optical shutter effect, luminance, hue, and the like were excellently obtained in terms of optical characteristics. However, in the case of Formulation E, when the voltage between the electrodes was not applied, the image display surface was visually recognized as being lightly colored by the scattered light by LCMC. Therefore, it was found that the ratio of pigment to LCMC is preferably higher than that of Formulation E.

  Furthermore, the thing of the laminated body thickness different from the laminated body thickness 7micrometer by mixing | blending AE was also produced as an experiment. Examples of those that were favorable in terms of optical characteristics and production were those of Formulation F with a laminate thickness of 12 μm and Formulations G and H with a laminate thickness of 20 μm. With these prototypes, when the laminate thickness is increased from 7 μm to 12 μm and 20 μm, the absolute value increases even if the proportion of the pigment is small compared to the thickness of the laminate thickness of 7 μm, so that good coloration can be confirmed. It was. In addition, when the laminate thickness was 20 μm, a good shutter effect was obtained due to the overlapping of LCMCs even when the ratio of the pigment was large.

  From the above results, the ratio of the pigment of each color to the mixture of the pigment of each color and LCMC is preferably from about 20% by weight (Formulation G) to about 75% by weight (Formulation H), and 30% by weight (Formulation E). Particularly preferred is from about 60 to about 60% by weight (formulation C). In other words, in the LCMC layer 14, the ratio of LCMC in the mixture of the pigment of each color and LCMC in the manufacturing process corresponds to about 25 wt% (blending H) to about 80 wt% (blending G). It is preferable to manufacture at the density of LCMC, and it is particularly preferable to make it from about 40% by weight (Formulation C) to about 70% by weight (Formulation E).

(2) Binder ratio Next, the amount of pigment of each color and the amount of LCMC were fixed to produce a prototype, and the ratio of the binder was determined. The results are shown in Table 2. In this examination, LCMC having an average particle diameter of 4.2 μm was used. The laminate thickness was 7 μm for Formulations I to K and 12 μm for Formulations L and M.

  In the trial products of Formulations I to K shown in Table 2, those of Formulation J can be handled without any problem in the manufacturing process at room temperature (20 ° C ± 15 ° C), and the optical shutter effect and luminance are also provided in terms of optical characteristics. Good hue and the like were obtained. However, in the case of Formulation I, the amount of the binder is relatively small, and the ink tends to be hard at room temperature, so that it has become difficult to apply in the coating process described later.

  On the other hand, the composition K has a phenomenon that the color density of the pigment due to the scattered light becomes thinner than the color density of the reference color in the state of looking at the scattered light, and the optical shutter by turning on / off the voltage between the electrodes. A phenomenon that the effect was not sufficiently obtained occurred.

  Furthermore, in order to obtain a preferable binder ratio, a laminate having a thickness different from the laminate thickness 7 μm in the blends I to K was also produced. Of these, if the optical characteristics and production were favorable, for example, it was that of the blends L and M having a laminate thickness of 12 μm.

  First, the thing of the mixing | blending L which increased the ratio of the binder is demonstrated. Since the ratio of the pigment of each color occupying the mixture of the pigment of each color and LCMC is as small as 40%, the mixture L has a laminate thickness of 12 μm rather than the aforementioned laminate thickness of 7 μm. Since the absolute amount of the pigment contained in the laminate was increased, good coloration was obtained.

  Next, the thing of the mixing | blending M which reduced the ratio of the binder is demonstrated. In coating at room temperature using a bar coater, which is a common method for forming a laminate on a film, to form a laminate as the binder ratio is decreased and the pigment and LCMC ratio is increased. The fluidity of the ink becomes poor, and uniform coating becomes difficult. Therefore, as a result of trial manufacture by raising the temperature of the bar coater, the ink and the coating film to about 60 ° C., it was confirmed that the compound M was good in optical characteristics and production.

  Furthermore, the compound I of which coating at room temperature was difficult was similarly made by raising the temperature of the bar coater, ink and coating film to about 60 ° C. As a result, it was confirmed that the compound of Formulation I was easy to apply and was good in optical characteristics and production. However, since the laminate thickness is 7 μm for the blend I and the laminate thickness is 12 μm for the blend M, the coating thickness of the blend M with a thick film is superior to that of the blend I. .

  From the above results, the ratio of the weight of the binder to the total weight is preferably from about 10% by weight (Formulation M) to about 50% by weight (Formulation L), and from about 17% by weight (Formulation I) to 44% by weight ( Particular preference is given to the order of formulation K).

[Coating color ink on film substrate (step S14)]
For example, ITO is formed on the film substrate 12 with a desired film thickness as the transparent electrode 13 by vapor deposition, and the color ink manufactured in step S13 is applied to the upper surface of the transparent electrode 13. Specifically, for example, the film thickness is set to a desired value with a variable film thickness applicator, and color ink is applied onto the transparent electrode 13. Thereafter, the color ink is cured with ultraviolet rays and dried. In addition, it is preferable to use a commercially available material in which ITO is previously formed on the film substrate 12 because the film forming step of the transparent electrode 13 can be omitted.

  Here, the examination result about the material of the film substrate 12 used at this process, the film thickness of the transparent electrode 13, and the coating thickness of color ink is demonstrated. In the following description of the examination results, the film substrate 12 on which the transparent electrode 13 is formed is referred to as a “transparent electrode film”.

(1) Examination result of transparent electrode film The optical shutter effect of the LCMC layer 14 was examined by changing the base film of the transparent electrode film. Table 3 shows the base film used in this study. A color ink containing LCMC having an average particle size of 4.2 μm was coated on the ITO film of the transparent electrode film with a film thickness of 7 μm, and gold was vapor-deposited on the upper surface by a sputtering apparatus.

  As shown in Table 3, as the base film, a polyester film, a polycarbonate film, a cyclic olefin copolymer film, and a light diffusion film were examined. Moreover, the transparent electrode (ITO) was formed on each base film, and the film thickness of the transparent electrode was evaluated. In addition, it replaced with the film thickness measurement of the transparent electrode, and measured the surface electrical resistance value.

  First, in the case where the polyester film was used as the base film, the surface electrical resistance of the transparent electrode was examined using four types shown in types a to d. As a result, the surface electrical resistance value of the transparent electrode = 30Ω / □ to 270Ω / □ is not affected by the optical shutter effect, and the liquid crystal in the LCMC is driven by the same interelectrode voltage in any of the polyester films a to d. It was confirmed that it can be opened and closed as an optical shutter.

  Next, a transparent electrode having a surface electrical resistance value = 35Ω / □ was evaluated for a polycarbonate film as a base film. In addition, in the case of using a cyclic olefin copolymer film as a base film, a transparent electrode having a surface electrical resistance value = 38Ω / □ was evaluated. As a result, in both cases, the liquid crystal in the LCMC was driven by the application of the voltage between the electrodes, and the opening and closing as an optical shutter could be performed satisfactorily.

  Furthermore, in the case where a light diffusing film having a light diffusing function composed of polyester as a base film was used as a base film, a transparent electrode having surface electrical resistance values of 29Ω / □ and 45Ω / □ was formed and evaluated. As a result, the liquid crystal in the LCMC is driven by the application of the voltage between the electrodes as in the three types of films described above, and can be opened and closed satisfactorily as an optical shutter. Due to the characteristics, the brightness of the scattered emitted light was improved as compared with the above-mentioned three types of films.

  Considering the above experimental results, as the material of the base film, cyclic olefin polymer, polyethersulfone, polysulfone, polybutylene terephthalate, polyarylate, polyetherimide, acetylcellulose, polystyrene, etc. are also the same as those used in the experiment. It can be used for

(2) Results of examination of coating thickness of color ink Next, the results of examination of coating thickness of color ink will be described.

  Table 4 shows the experimental results of the relationship between the applied voltage and the coating thickness of the color ink, where the voltage driven by the liquid crystal in the LCMC is the applied voltage. In this examination, a transparent electrode was formed of ITO on a polycarbonate film, and a color ink containing LCMC having an average particle diameter of 4.2 μm was applied on the transparent electrode. The surface resistance value of the transparent electrode was 35Ω / □.

  Table 4 shows that the liquid crystal cannot be driven unless the applied voltage is increased as the ink coating thickness is increased. In general, the voltage for driving the liquid crystal display device is about 30 V. From this result, the coating thickness of the color ink is preferably about 20 μm or less.

  The lower limit of the color ink coating thickness is preferably about 3 μm because the average particle diameter of LCMC that can be produced at present is about 1 μm to 1.5 μm and the LCMC layer 14 is composed of a plurality of layers.

  From the above results, the coating thickness of the color ink is preferably in the range from about 3 μm to about 20 μm, and in consideration of optical characteristics and manufacturing variations, it is set in the range from about 7 μm to about 14 μm. Particularly preferred.

  Next, in addition to the ink coating thickness, the relationship between the surface resistance value of the transparent electrode and the applied voltage was examined. The results are shown in Table 5. In this examination, a color ink containing LCMC having an average particle diameter of 4.2 μm was applied on ITO formed on a polyester film.

  As shown in Table 5, in the range of the surface resistance value of the transparent electrode from 30 Ω / □ to 270 Ω / □, the applied voltage is constant at 20 V when the coating thickness is 7 μm, but the coating thickness is 18 μm and 27 μm. It was found that as the thickness increases, the surface resistance of the transparent electrode is affected. That is, it is necessary to increase the applied voltage as the film thickness of the transparent electrode becomes thinner.

[Transparent electrode is formed (step S15)]
For example, ITO is vapor-deposited on the upper surface of the color ink formed in step S <b> 14 to form the transparent electrode 15. In addition, it is good also as a structure which forms a protective film in the upper surface of the transparent electrode 15 formed here.

[Plate Polarizing Plate (Step S16)]
A polarizing plate 11 is attached to the lower surface of the film substrate 12, and a polarizing plate 16 is attached to the upper surface of the transparent electrode 15 (see FIG. 1). Here, the polarizing plate 11 is pasted so that the direction in which the linearly polarized light is emitted and the direction in which the polarizing plate 16 emits the linearly polarized light are orthogonal to each other.

[Evaluation criteria for optical shutter effect]
Next, the evaluation criteria for the optical shutter effect in this embodiment will be described. In the present embodiment, an illuminance meter and a dark box are used to refer to the illuminance measurement results under the following conditions to determine the evaluation criteria for the optical shutter effect. Under the following conditions, the polarizing plates are arranged so that the light transmission directions are orthogonal to each other. The symbol “Lx” represents the illuminance unit “lux”.

1. Measurement result of illuminance (1) Illuminance of backlight only: 60Lx
(2) Illuminance in combination with backlight and two polarizing plates: 0.05 Lx
(3) Illuminance (reference data) when a backlight, two polarizing plates, and an RGB resist-formed sheet (thickness 1 μm) are inserted between two polarizing plates: R = 0.10 Lx, G = 0 .20Lx, B = 0.08Lx
(4) Illumination with a backlight, two polarizing plates, and a prototype RGB laminate (thickness 7 μm) having ITO-deposited transparent electrodes inserted between the two polarizing plates, and the illuminance when the voltage between the electrodes is off: R = 1.64Lx, G = 2.83Lx, B = 1.45Lx
(5) Illumination with a backlight, two polarizing plates, and a prototype RGB laminate (thickness 7 μm) having ITO-deposited transparent electrodes inserted between the two polarizing plates, and the voltage between the electrodes on: each color The measured value is about 1/10 of the above (4)

2. Evaluation Criteria for Optical Shutter Effect In this embodiment, when the optical shutter effect is confirmed, an electrode in which gold is vapor-deposited on the upper surface of the laminate is used in place of the ITO vapor-deposited transparent electrode. In this case, when checking only B of RGB, the illuminance when the inter-electrode voltage is off corresponding to (4) above is 0.23 Lx, and the illuminance when the inter-electrode voltage is on corresponding to (5) above is 0.13 Lx. Was the illuminance. That is, B = 1.45 in the case of the transparent electrode made of the ITO vapor deposition film shown in the above (4), it is lowered to 0.23 Lx in the electrode made of the gold vapor deposition film, and further lowered to 0.13 Lx by turning on the inter-electrode voltage. did.

  Considering the above results, as an evaluation criterion for determining the presence or absence of the optical shutter effect, the one having an illuminance when the interelectrode voltage is on is ½ or less of the illuminance when the interelectrode voltage is off has the optical shutter effect. It was supposed to be.

  As described above, according to the display device 10 in the present embodiment, the LCMC 14 a includes the LCMC layer 14 arranged in a plurality of layers, and the LCMC layer 14 is interposed between the transparent electrodes 13 and 15 on the film substrate 12. Since it is configured to be tightly fixed with a non-aqueous fixing agent, it has flexibility and flexibility, and prevents short circuit between the transparent electrodes 13 and 15 and corrosion of the transparent electrodes 13 and 15. Can do.

  In addition, according to the display device 10 in the present embodiment, the configuration is simpler than that of the conventional one, and an alignment film, an alignment process, a liquid crystal sealing material, a sealing process, and the like are not required, thereby reducing manufacturing costs. be able to.

  Further, according to the display device 10 in the present embodiment, the charging ratio, the average particle diameter of the LCMC 14a, the LCMC layer, based on the optical characteristics of the scattered emitted light when the incident light is scattered and emitted in the LCMC layer 14 14 having an LCMC laminate having a configuration in which at least one of the thickness of LCMC 14a and the density of LCMC 14a in the LCMC layer 14 is set. Thus, optical characteristics such as luminance and hue are improved, and a color image is suitably used. Can be displayed.

  In addition, according to the display device 10 in the present embodiment, since the scattered light from the LCMC layer 14 is configured to be seen by the viewer, the light diffusion sheet that has been conventionally used for diffusion of incident light and improvement of luminance and This corresponds to a prism sheet and an optical shutter that transmits or blocks incident light, and the light source is moved to the viewer side as compared with the conventional one, so that the viewing angle can be widened.

  In addition, according to the display device 10 in the present embodiment, since the LCMC layer 14 is provided on the film substrate 12, for example, a color image is displayed while being bent along the periphery of a cylindrical object, It is possible to display a color image while keeping the surface along the uneven surface of the object having a surface.

  In the above-described embodiment, the configuration in which the film substrate 12 is provided only on the incident surface side of the LCMC layer 14 has been described as an example. However, the present invention is not limited to this, and for example, the transparent electrode 15 and An additional film substrate may be provided between the polarizing plate 16 and the polarizing plate 16.

(Second Embodiment)
First, the structure in 2nd Embodiment of the display apparatus 20 which concerns on this invention is demonstrated.

  As shown in FIG. 5, the display device 20 in the present embodiment is obtained by changing a part of the display device 10 (see FIG. 1) in the first embodiment, and includes an LCMC layer 21 and a color filter 22. The prepared point is different. Therefore, the description of the same configuration as the description of the display device 10 in the first embodiment is omitted.

  The LCMC layer 21 is composed of a plurality of LCMCs 21a and a binder (not shown) that does not contain a colorant for color display. Here, the LCMC 21a is the same as the LCMC 14a in the first embodiment, but a different code is used for convenience.

  The color filter 22 has a configuration in which, for example, red (R), green (G), and blue (B) are colored by a coloring material for each predetermined region on the light emission surface.

  Next, the manufacturing process of the display device 20 in the present embodiment will be described with reference to FIGS. FIG. 6 is a flowchart showing an outline of the manufacturing process of the display device 20, and the same steps as the manufacturing process (see FIG. 4) of the display device 10 in the first embodiment are denoted by the same reference numerals and described. Omitted.

[Inking (Step S21)]
LCMC powder obtained by washing and drying in step S12 and a non-aqueous resin as a binder are prepared. As the non-aqueous resin, those shown in the first embodiment can be used. Next, the LCMC powder and the binder are kneaded with an ink spatula to obtain an inkized LCMC. The mixing ratio of the LCMC powder and the binder is preferably determined as appropriate in consideration of workability.

[Ink is applied to the film substrate (step S22)]
For example, ITO is formed as a transparent electrode 13 with a desired film thickness on the film substrate 12 by vapor deposition, and the ink produced in step S21 is applied to the upper surface of the transparent electrode 13.

[Form Color Filter (Step S23)]
A color filter 22 made of, for example, red, green and blue is formed on the upper surface of the transparent electrode 15 formed in step S15. For example, the color filter 22 is formed using a commercially available color filter. Further, for example, the color filter 22 may be formed by forming a color filter film on the upper surface of the transparent electrode 15 using a known film forming technique.

  As described above, according to the display device 20 in the present embodiment, the LCMC 21 a includes the LCMC layer 14 arranged in a plurality of layers, and the LCMC layer 14 is interposed between the transparent electrodes 13 and 15 on the film substrate 12. Since the color filter 22 is formed on the transparent electrode 15 by being intimately fixed with a non-aqueous fixing agent, it has flexibility and flexibility and is short-circuited or transparent between the transparent electrodes 13 and 15. Corrosion of the electrodes 13 and 15 can be prevented.

  In addition, according to the display device 20 in the present embodiment, the configuration is simpler than that of the conventional device, and an alignment film, an alignment process, a liquid crystal sealing material, a sealing process, and the like are not required, thereby reducing manufacturing costs. be able to.

  In the above-described embodiment, the color filter 22 is provided as an example for displaying a color image. However, the present invention is not limited to this, and a monochrome display device without the color filter 22 is provided. It can also be.

  As described above, the display device according to the present invention has flexibility and flexibility, prevents short circuit between the transparent electrodes and corrosion of the transparent electrodes, and has an effect that the manufacturing cost can be reduced. It is useful as a color image display device having a backlight.

1 is a conceptual cross-sectional view of a display device according to a first embodiment of the present invention. Electron micrograph of the liquid crystal microcapsule laminate in the first embodiment of the display device according to the present invention. FIG. 4 is a conceptual operation explanatory diagram of the display device according to the first embodiment of the present invention. The flowchart which shows the manufacturing process of the display apparatus in 1st Embodiment of this invention. Conceptual sectional drawing of the display apparatus in 2nd Embodiment of this invention. The flowchart which shows the manufacturing process of the display apparatus in 2nd Embodiment of this invention.

Explanation of symbols

10, 20 Display device 11 Polarizing plate (first polarizing plate)
12 Film substrate 13 Transparent electrode (first transparent electrode)
14 LCMC layer 14a LCMC
14b Red ink 14c Green ink 14d Blue ink 14e Liquid crystal particles 15 Transparent electrode (second transparent electrode)
16 Polarizing plate (second polarizing plate)
21 LCMC layer 21a LCMC
22 Color filter 30, 101 Light source 100 Liquid crystal display device 102, 111 Polarizing plate 103, 110 Glass substrate 104, 108 Transparent electrode 105, 107 Alignment film 106 Liquid crystal layer 106a Liquid crystal particle 109 Color filter

Claims (11)

Liquid crystal microcapsules formed by setting a liquid crystal agent and an encapsulating agent for encapsulating and encapsulating the liquid crystal agent in a predetermined charging ratio, and non-aqueous for fixing the liquid crystal microcapsules in close contact with each other A liquid crystal microcapsule layer in which the liquid crystal microcapsules are arranged in a plurality of layers,
The liquid crystal microcapsule layer is based on the optical characteristics of the scattered outgoing light when the incident light is scattered and emitted in the liquid crystal microcapsule layer when light is incident in the thickness direction of the liquid crystal microcapsule layer. And at least one of the charging ratio, the diameter of the liquid crystal microcapsule, the thickness of the liquid crystal microcapsule layer, and the density of the liquid crystal microcapsule in the liquid crystal microcapsule layer is set. A liquid crystal microcapsule laminate characterized by the above. The fixing agent is colored with a predetermined coloring material over the entire thickness of the liquid crystal microcapsule layer for each predetermined region on the light exit surface from which the scattered light exits. The liquid crystal microcapsule laminate according to claim 1. The liquid crystal microcapsule is formed such that a charging ratio of the liquid crystal agent and the encapsulating agent ranges from 92: 8 to 75:25 by weight. 2. A liquid crystal microcapsule laminate according to 2. The liquid crystal microcapsule according to any one of claims 1 to 3, wherein the liquid crystal microcapsule is formed with an average particle diameter ranging from 1 micrometer to 10 micrometers. Capsule laminate. The liquid crystal microcapsule layer according to any one of claims 1 to 4, wherein the liquid crystal microcapsule layer is formed with a thickness in a range from 3 micrometers to 20 micrometers. Capsule laminate. The liquid crystal microcapsule layer is a liquid crystal microcapsule layer in which a ratio of the liquid crystal microcapsule in a mixture of the colorant and the liquid crystal microcapsule corresponds to a range of 25 weight percent to 80 weight percent in a manufacturing process. The liquid crystal microcapsule laminate according to claim 2, wherein the liquid crystal microcapsule laminate is formed with a density. The liquid crystal microcapsule layer is formed such that a weight of the fixing material occupying a total weight of the colorant, the liquid crystal microcapsule, and the fixing material in a manufacturing process is in a range of 10 weight percent to 50 weight percent. The liquid crystal microcapsule laminate according to any one of claims 2 to 6, wherein the laminate is a liquid crystal microcapsule laminate. A liquid crystal comprising the liquid crystal microcapsule laminate according to any one of claims 1 to 7 and a light-transmitting film substrate provided with the liquid crystal microcapsule laminate. Microcapsule laminate substrate. A liquid crystal microcapsule laminate according to any one of claims 1 and 3, wherein the liquid crystal microcapsule layer includes a light incident surface on which light is incident and a light output surface on which light is emitted. A display device comprising:
First and second transparent electrodes provided on the light incident surface side and the light emitting surface side, respectively, and a first polarization that transmits only light that is provided on the light incident surface side and vibrates in a first direction. A plate, a second polarizing plate that is provided on the light exit surface side and transmits only light that vibrates in a second direction orthogonal to the first direction, the light incident surface side, and the light exit surface side A film substrate having translucency provided on at least one side,
When the liquid crystal microcapsule layer receives the light from the light incident surface, a predetermined interelectrode voltage is not applied between the first transparent electrode and the second transparent electrode. The display device characterized in that the scattered emission light is emitted from the light emission surface side, and the scattered emission light is not emitted from the light emission surface side when the predetermined inter-electrode voltage is applied. . The display device according to claim 9, further comprising a color filter colored with a predetermined coloring material for each predetermined region on the light emitting surface. A display device comprising the liquid crystal microcapsule laminate according to any one of claims 2 to 7, wherein the liquid crystal microcapsule layer has a light incident surface for entering light and a light emitting surface for emitting light. There,
First and second transparent electrodes provided on the light incident surface side and the light emitting surface side, respectively, and a first polarization that transmits only light that is provided on the light incident surface side and vibrates in a first direction. A plate, a second polarizing plate that is provided on the light exit surface side and transmits only light that vibrates in a second direction orthogonal to the first direction, the light incident surface side, and the light exit surface side A film substrate having translucency provided on at least one side,
When the liquid crystal microcapsule layer receives the light from the light incident surface, a predetermined interelectrode voltage is not applied between the first transparent electrode and the second transparent electrode. The display device characterized in that the scattered emission light is emitted from the light emission surface side, and the scattered emission light is not emitted from the light emission surface side when the predetermined inter-electrode voltage is applied. .