JP2010191388A - Method for manufacturing color filter substrate, and method for manufacturing panel for color information display - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for accurately and efficiently manufacturing a color filter substrate without spreading ink even in printing process like inkjet printing. <P>SOLUTION: A hot melt adhesive achromatic and transparent film layer 1 subjected to roughening treatment is disposed on one surface of a transparent panel substrate 5, and color filters 32R, 32G, and 32BL in different colors are formed apart from each other on a roughened surface of the hot melt adhesive achromatic and transparent film layer. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  In the present invention, information such as a monotone image displayed by moving a display medium enclosed between two opposing substrates, at least one of which is transparent, is provided in another color (R: red, G : Green, BL: blue, etc.) relating to a color information display panel for color display. In particular, the present invention relates to a method for manufacturing a color filter substrate that is suitably employed as an observation-side panel substrate for such a color information display panel, and a method for manufacturing a color information display panel using the color filter substrate.

  As a display panel that constitutes an information display device that replaces a conventional liquid crystal display device (LCD), a charged particle electrophoresis system (moving in gas and moving in liquid) display panel, rotating particles with two colors arranged on the surface in half There has been proposed a thin sheet-like display panel capable of obtaining visibility such as viewing what is drawn on paper by using a technique of visually recognizing light reflected from a display medium, such as a display panel of a display system. Compared with liquid crystal display panels, such information display panels have advantages such as a wide viewing angle close to that of ordinary printed materials, low power consumption, and a memory function. Development to next-generation information display devices called is expected. Recently, charged particles are encapsulated in a microcapsule together with a dispersion liquid as dispersed particles, and the display is configured as a group of particles including charged particles, or an electrophoretic method in a configuration in which the charged particles are disposed between opposing substrates. A charged particle gas moving system in which a medium is disposed between gas cavities between opposing substrates has been proposed and is expected.

  For example, Patent Document 1 discloses that a particle group including particles having at least an optical reflectivity and a chargeability between gas cavities formed between two opposing substrates, at least one of which is transparent, is mutually charged. A white display medium and a black display medium having different characteristics are enclosed, and an electric field is applied to the white display medium and the black display medium through a color filter disposed on the observation side substrate, thereby reversing each other and transferring information such as an image. A color information display panel for color display is disclosed.

JP 2007-322782 A

In order to obtain a color information display panel using a color filter in Patent Document 1, color ink is printed on a transparent panel substrate by inkjet printing to form a color filter, or a color resist is exposed and developed by a photolithography method. Then, a panel substrate with a color filter (color filter substrate) is produced by a method of forming a color filter. And the method of sealing display media, such as a particle group and a liquid crystal, between the other opposing board | substrates was taken.
However, the photolithographic method has a disadvantage that it takes a lot of man-hours. Ink jet printing is preferable because it can be easily carried out, but since the ink is repelled or spreads on the panel substrate, the color filter cannot be formed with sufficient accuracy. As a result, there is a problem that when there is a request for providing a desired gap between adjacent color filters, this cannot be met. There is also a demand for a color filter substrate or a method for manufacturing the color filter substrate that can manufacture a color information display panel more accurately and efficiently.

  Therefore, a main object of the present invention is to solve the above-described problems and provide a method for manufacturing a color filter substrate with high accuracy and efficiency without spreading ink even in printing methods such as inkjet printing and flexographic printing. is there.

  The object is to arrange a heat-sealable colorless transparent film layer that has been subjected to uneven treatment on one surface of a transparent panel substrate, and to provide a different color filter on the uneven surface of the heat-sealable colorless transparent film layer. This can be achieved by a method of manufacturing a color filter substrate characterized by being formed with a gap therebetween.

  Further, a structure in which a transparent conductive film is formed on the other surface of the transparent panel substrate may be adopted. Further, a colorless and transparent film is further stacked on the color filter, and then the heat-fusible and colorless and transparent film layer is melted and solidified by pressing with heat, and the colorless and transparent film is converted into the color filter. It is desirable to have a structure bonded to the top.

  In addition, it is desirable to print the color ink on the uneven surface of the heat-sealable colorless transparent film layer to form the different color filter.

  In addition, color ink may be printed on the concavo-convex surface of the heat-fusible colorless and transparent film layer so that the color filter and the rib-shaped light-shielding material have a gap therebetween.

  In addition, each color filter is made smaller than the area of the pixel by making the length of at least one pair of opposite sides of the corresponding pixel shorter than the length of one set of opposite sides of the corresponding pixel, and at the center of the pixel When the gaps are arranged so that the gaps have the same length on at least one side of the color filter, the ratio Scf / Sd of the area Scf of the color filter and the area Sd of the pixel is 50% or more. It is desirable to provide as follows. Moreover, it is desirable that the surface roughness Ra of the heat-sealable colorless transparent film layer subjected to the unevenness treatment is 0.1 μm to 2 μm.

The object is to display color information by color-displaying an information image by electrically driving a display medium arranged in a facing space between two panel substrates, at least one of which is transparent, using a color filter. A method of manufacturing a panel,
The color filter substrate manufactured by the method for manufacturing a color filter substrate described above is used as an observation side panel substrate, and is manufactured by placing a display medium in a facing space of the other back side panel substrate substrate and then bonding them together. It is also achieved by a method for manufacturing a color information display panel characterized by the above.

Another object of the present invention is to produce a color information display panel capable of displaying an information image in color by electrically driving a display medium disposed in a facing space between two substrates, at least one of which is transparent, using a color filter. A method,
On the outer surface of the observation-side transparent substrate of the panel structure in which the display medium is disposed in the space between the two substrates transparent at least one, a heat-sealable colorless transparent film layer having been subjected to unevenness processing is disposed In the state, another color filter is formed on the uneven surface of the heat-fusible colorless transparent film layer with a gap between each other, and the colorless transparent film is further stacked on the formed color filter, and then with heat. It can also be achieved by a method for manufacturing a color information display panel, wherein the colorless and transparent film is bonded onto the color filter by pressing.

  The color filter may be formed by printing color ink on the uneven surface of the heat-fusible colorless and transparent film layer.

  Further, color ink may be printed on the uneven surface of the heat-fusible colorless transparent film layer so that the color filter and the rib-shaped light shielding material have a gap therebetween.

  In addition, each color filter is smaller than the area of the pixel by making the length of at least one pair of opposite sides of the corresponding pixel shorter than the length of one pair of opposite sides of the corresponding pixel, and the center of the pixel When the gaps are arranged so that the gaps have the same length on at least one side of the color filter, the ratio Scf / Sd of the area Scf of the color filter and the area Sd of the pixel is 50% or more. It is desirable to have such a structure.

  Moreover, it is desirable that the surface roughness Ra of the heat-sealable colorless transparent film layer subjected to the unevenness treatment is 0.1 μm to 2 μm.

  A color information display panel capable of color-displaying an information image by electrically driving a display medium disposed in a facing space between two panel substrates, at least one of which is transparent, using a color filter, The above object can also be achieved by a color information display panel obtained by the method for manufacturing a color information display panel according to any one of the above.

  The different color filter is composed of any one of three primary color filters or four color filters of three primary colors and colorless and transparent, and the display medium is configured as a particle group including white particles having charging properties. Two types of display media can be used, the white display medium and the black display medium configured as a particle group including black particles having chargeability opposite to the chargeability.

  According to the present invention, a heat-fusible colorless and transparent film layer is disposed on a transparent panel substrate constituting a color information display panel, and the surface of the heat-fusible and colorless transparent film layer is subjected to an uneven treatment, A color filter or rib-shaped shading material is formed on the uneven surface by a printing method such as inkjet printing or flexographic printing, so that the color filter or rib shape of another color is accurately spaced at a predetermined position without spreading ink. A light shielding material can be arranged. Therefore, a color filter substrate for a color information display panel can be manufactured with high accuracy and efficiency.

(A), (b) is the figure shown in order to demonstrate the structure used as the example of the information display panel which can be displayed in color which is the object of this invention. (A), (b) is the figure shown in order to demonstrate the structure as another example of the information display panel which can be color-displayed which is the object of this invention. (A), (b) is the figure shown in order to demonstrate the structure used as the further another example of the information display panel in which the color display used as the object of this invention is possible. (A)-(e) is the figure shown about the one part process for manufacturing a color filter substrate. It is a figure for demonstrating the preferable form in the case of arrange | positioning a color filter small in the center position with respect to a corresponding pixel. It is a figure for demonstrating the other preferable form when arrange | positioning a color filter small in the center position with respect to a corresponding pixel. It is a figure for demonstrating the other preferable form when arrange | positioning a color filter small in the center position with respect to a corresponding pixel. It is a figure for demonstrating the other preferable form when arrange | positioning a color filter small in the center position with respect to a corresponding pixel. It is a figure for demonstrating the form formed in the heat-sealable colorless and transparent film layer surface on a panel board | substrate in the case where a color filter is arrange | positioned small in the center position with respect to a corresponding pixel. It is a figure for demonstrating the form formed in the heat-sealable colorless and transparent film layer surface on a panel board | substrate in the case where a color filter is arrange | positioned small in the center position with respect to a corresponding pixel. (A), (b) is the figure shown about the example of the form of the panel board | substrate with which this invention is applied. It is the figure which showed the example of formation in the case of applying the produced color filter board | substrate to the observation side panel board | substrate 5 of the color information display panel. It is the figure which showed the example of formation in the case of applying this invention to the observation side panel board | substrate of a panel structure. It is the figure shown about the process example employable when arrange | positioning a heat-fusable colorless and transparent film layer on a panel board | substrate. It is the figure shown about the other process example employable when arrange | positioning a heat-fusable colorless and transparent film layer on a panel board | substrate.

  Embodiments according to the present invention will be described below with reference to the drawings. The present invention relates to a method for manufacturing a color filter substrate that is assembled as a part of a structure when an information display panel suitably used as electronic paper or the like is manufactured. In order to facilitate understanding of the invention, first, an example of a color information display panel capable of color display, which is an object of the invention, will be described with reference to FIGS. 1 (a), (b) to 3 (a), (b). To do.

  In the example shown in FIGS. 1A and 1B, an example of color display in which one display unit is constituted by three pixels is shown. In the example shown in FIGS. 1A and 1B, a cell containing a display medium is associated with a pixel, and as the display medium, all of the cells 31-1 to 31-3 are at least optically reflective and charged. Two types of display media configured as a particle group including particles having a property (a white display medium 23W configured as a particle group including negatively charged white particles 23Wa and a particle group including positively charged black particles 23Ba) The configured black display medium 23B) is filled.

  A red color filter 32R is provided on the observer side of the first cell 31-1, a green color filter 32G is provided on the observer side of the second cell 31-2, and an observer side of the third cell 31-3 is provided. A blue color filter 32BL is provided. Here, one display unit (one dot) is constituted by three pixels corresponding to the three cells of the first cell 31-1, the second cell 31-2, and the third cell 31-3. In this example, an electrode 26 (line electrode) made of a transparent conductive film provided on the transparent panel substrate 5 on the observer side and an electrode 25 (line electrode) provided on the substrate 21 on the back side are formed so as to cross each other at right angles. The display medium is moved in the vertical direction between the substrates 5 and 21 in accordance with an electric field generated by applying a voltage between the pair of pixel electrodes. The pixel electrode pair and each color filter are in a one-to-one correspondence.

  And as shown to Fig.1 (a), a white dot display is performed with respect to an observer by moving the white display medium 23W in all the pixels to an observer side, or as shown in FIG.1 (b). In addition, black dots are displayed to the viewer by moving the black display medium 23B to all the pixels on the viewer side. Multi-color dot display can be performed by moving the display medium at the pixel position. The cell is defined by partition walls 24 arranged in four directions, but the partition wall in front is omitted in FIGS. 1 (a) and 1 (b). A structure in which a partition for forming this cell is not provided may be employed. Further, a partition wall may be provided so that the pixel and the cell do not correspond to each other.

Here, the different color filters 32 set on the observation-side panel substrate 5 shown in FIGS. 1A and 1B (when 32R, 32G, and 32BL are not distinguished from each other, they are simply indicated by 32) are as follows. As will be described later, an example in which another colorless and transparent film 3 is provided as a protective layer for the formed color filter after being formed by printing on the surface of the heat-fusible colorless and transparent film layer 1 that has been subjected to the unevenness treatment is shown. ing.
In the present embodiment, the base of the color filter substrate 41 is configured by disposing the heat-sealable colorless and transparent film layer 1 on the transparent panel substrate 5 and forming the color filter 32 thereon. However, on the upper surface of the color filter substrate 41 shown in FIG. 1 and the following FIG. 2 and FIG. 3, a color filter substrate 41 having a more preferable structure including a colorless and transparent film 3 serving as a protective layer of the color filter is shown. Yes. In this case, the heat-sealable colorless and transparent film layer 1 once melted by heating is solidified, so that the panel substrate 5 and the film 3 serving as the outer protective layer are integrated with the other color filter 32 embedded therein. It becomes.

  The present invention manufactures a color filter substrate without spreading ink when a color filter or a rib-shaped light shielding material is formed by printing. This point will be described in detail after another structural example of the information display panel structure is described with reference to FIGS. The color filter and the rib-shaped light-shielding material are formed on the concavo-convex surface formed on the colorless and transparent heat-fusible film layer by printing such as an inkjet method or a flexo method. The color filter for each color is formed so as to be in the center position with respect to the corresponding pixel and to have a smaller area than the pixel. The rib-shaped light-shielding material is formed with a gap from the color filter at a position that is a gap between the color filters. The order of forming the color filter and the rib-shaped light shielding material may be that the rib-shaped light shielding material may be formed after the color filter is formed, or the color filter may be formed after the rib-shaped light shielding material is formed. You may form a rib-shaped light-shielding material simultaneously. In the present invention, the color filter and the light shielding material can be arranged in the same layer.

  The color information display panel illustrated in FIGS. 2A and 2B also shows a case where a color display that constitutes one display unit with three pixels is performed. That is, also in the example shown in FIGS. 2A and 2B, the cell that accommodates the display medium is associated with the pixel, and the display medium has at least an optical reflectance in all of the cells 31-1 to 31-3. And two types of display media configured as a particle group including particles having high chargeability (particles including white display medium 23W configured as a particle group including negatively charged white particles 23Wa and positively charged black particles 23Ba) A black display medium 23B) configured as a group is filled. A red color filter 32R is provided on the observer side of the first cell 31-1, a green color filter 32G is provided on the observer side of the second cell 31-2, and an observer side of the third cell 31-3 is provided. A blue color filter 32BL is provided, and one display unit (one dot) is configured by three pixels corresponding to the three cells of the first cell 31-1, the second cell 31-2, and the third cell 31-3. is doing.

  However, in this example, a voltage is applied between a pixel electrode pair formed by an electrode 26 (common electrode) provided on the transparent substrate 5 and an electrode 25 (pixel electrode with TFT (thin film transistor)) provided on the substrate 21 on the back side. The display medium is moved between the substrates 5 and 21 in the vertical direction according to the electric field generated by applying. The pixel electrode pair and each color filter are in a one-to-one correspondence. Then, as shown in FIG. 2 (a), white dots are displayed to the viewer by moving the white display medium 23W in all pixels to the viewer side, or as shown in FIG. 2 (b). In addition, black dots are displayed to the viewer by moving the black display medium 23B to all the pixels on the viewer side. Multi-color dot display can be performed by moving the display medium at the pixel position. In addition, the front partition is also omitted in FIGS. 2 (a) and 2 (b). A structure in which a partition for forming this cell is not provided may be employed. Further, a partition wall may be provided so that the pixel and the cell do not correspond to each other.

Further, FIG. 3 is a view showing another example of the information display panel structure in which microcapsules (MC) are arranged between two panel substrates in the same manner as FIGS. In the microcapsule (MC), the charged white particle group 23Wa and the black particle group 23Ba are enclosed as a display medium together with the insulating liquid. The color information display panel illustrated in FIGS. 3A and 3B also shows a case where color display that constitutes one display unit with three pixels is shown, and an electrode 26 (common electrode) provided on the transparent substrate 5 And microcapsules MC in an electrophoretic manner in accordance with an electric field generated by applying a voltage between a pair of pixel electrodes composed of electrodes 25 (pixel electrodes with TFTs (thin film transistors)) provided on a substrate 21 on the back side. The display medium is moved between the substrates 5 and 21 in the vertical direction.
Then, as shown in FIG. 3A, white dot display is performed for the observer by moving the white display medium 23W in all pixels to the viewer side, or as shown in FIG. In addition, black dots are displayed to the viewer by moving the black display medium 23B to all the pixels on the viewer side. Multi-color dot display can be performed by moving the display medium at the pixel position.

As a material of the transparent panel substrate 5 employed in the color filter substrate 41, a material having high visible light transmittance and good heat resistance is preferable. Examples of the substrate material include transparent resin sheets such as polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polyethersulfone (PES), polyethylene (PE), and acrylic, glass sheets, and quartz sheets.
The thickness of the panel substrate 5 is in the range of 10 to 1000 μm, preferably in the range of 10 to 500 μm, and more preferably in the range of 25 to 200 μm. If it is thinner than 10 μm, it will be difficult to maintain the strength and uniformity of the distance between the substrates when the panel structure is formed, and if it is thicker than 1000 μm, it cannot be said to be a thin information display panel. In particular, when the surface on which the color filter is formed is the outer surface of the panel, the parallax generated when the display medium is recognized through the color filter when the thickness of the transparent panel substrate 5 on the observation side exceeds 200 μm. However, there is a disadvantage that affects the display image quality.

As described above, the heat-sealable colorless and transparent film layer 1 is disposed on the transparent panel substrate 5, and a color filter is formed on the heat-sealable and colorless transparent film layer 1 as a color filter substrate 41. Yes. When forming a color filter of a different color by printing on the panel substrate 5, if the ink spreads or the like as pointed out above, the boundary becomes unclear, resulting in a color information display panel with poor display quality. End up.
Therefore, even if the conventional printing technology is used, there is no such problem, and a new manufacturing method that can accurately arrange the color filter by adopting surface irregularities on the heat-sealable colorless transparent film layer 1 is adopted. ing. Therefore, below, the embodiment concerning the manufacturing method of the color filter substrate of this invention and the manufacturing method of the panel for a color information display is described in detail with reference to drawings.

  FIG. 4 is a diagram showing a partial process for manufacturing the color filter substrate. In this step, the heat-sealable colorless and transparent film layer 1 is disposed on the transparent panel substrate 5 used on the observation side of the color information display panel, and the surface of the film layer 1 is subjected to uneven processing. The surface of the heat-sealable colorless and transparent film layer as shown in FIG. 4 (b) by rotating and pressing the plate roller RL having a predetermined uneven plate formed on the surface as shown in FIG. 4 (a). Unevenness is formed on 1a.

The heat-sealable transparent film layer includes acrylic resin, methacrylic resin, ethylene-vinyl acetate copolymer resin (EVA resin), polyethylene resin, polyamide resin, ethylene-ethyl acrylate copolymer resin (EEA). Resin) and the like.
Since these resins soften at around 100 ° C., they are bonded together by pressing with a heat lower than 100 ° C. against a colorless transparent film 3 placed as a protective layer on the color filter after forming the color filter. It is preferable because it comes to be

  Then, as shown in FIG. 4C, color filters 32 (for example, 32R, 32G, and 32BL) are formed on the concavo-convex surface for each color by printing, and the color filter substrate 41 is manufactured. By providing the surface 1a of the heat-fusible film layer 1 with irregularities having an appropriate surface roughness, the state where the printing ink is repelled can be suppressed. As a result, the color filters of a predetermined size can be arranged close to each other on the transparent panel substrate 5 so that a printing method in which ink is easily repelled, such as ink jet printing, can be employed. Therefore, according to the manufacturing method shown in FIG. 4, the color filter can be formed with high accuracy while increasing the manufacturing efficiency. The same applies to flexographic printing.

  When the surface roughness Ra is adjusted to be in the range of 0.1 μm to 2 μm in the uneven treatment on the surface of the heat-fusible colorless transparent film layer 1, the printing ink is printed on the film layer without being repelled. Therefore, a color filter having a predetermined shape and a predetermined size can be formed. In particular, it is effective for improving the printability when the ink is formed by a printing method in which ink is easily repelled and is difficult to print, such as inkjet printing. Even if the surface roughness Ra is smaller than 0.1 μm or the surface roughness Ra is larger than 2 μm, the effect of preventing ink repelling is reduced.

  And as shown in FIG.4 (d), it is desirable to set it as the color filter board | substrate 41 which has arrange | positioned the transparent film 3 used as a protective layer on the color filter 32. As shown in FIG. Thereby, the layer structure of the panel substrate 5 on the observation side is arranged. Finally, when the protective transparent film 3 and the panel substrate 5 are pressed together with heat, the layer 1 which is a heat-fusible film is melted and solidified to form a color formed on the panel substrate 55 by the same action as the adhesive. Since the transparent film 3 can be bonded so as to cover the filter layer, as shown in FIG. 4E, a color filter substrate 41 used for a color information display panel can be manufactured.

  Here, the configuration example in which the color filter substrate 41 is disposed outside the panel substrate 5 is shown in the case of the color information display panel having the configuration example shown in FIGS. In such a structure, the thickness of the panel substrate is 25 μm to 200 μm, preferably 25 μm to 100 μm. If it is thinner than 25 μm, there is an inconvenience that it becomes difficult to handle when making a panel structure. If it is thicker than 200 μm, the parallax when viewing reflected light from the display medium becomes large, resulting in color mixing with adjacent color filter colors. There is an inconvenience that makes it easy to do.

  The color filter formed on the heat-sealable colorless and transparent film layer 1 will be described. The color filter is composed of, for example, a color filter of three primary colors or a color filter of three primary colors and a colorless and transparent color, and a gap is provided at least between color filters having different colors. In the color filter substrate 41, when the color filter 32 is arranged outside the panel substrate 5, the thickness of the panel substrate on the observation side is set to 25 μm to 200 μm as described above, and has a smaller area than the pixel. A color filter is preferable.

  Further, the color filter of each color is made smaller than the area of the work by making the length of at least one pair of opposite sides of the corresponding pixel shorter than the length of one set of opposite sides of the corresponding pixel, When the color filter has the same length gap on at least one side of the color filter, the ratio Scf / Sd between the color filter area Scf and the pixel area Sd is 50% or more. It is preferable to provide it as follows. Thereby, even when the display screen is viewed from an oblique direction, it is possible to obtain a display state without color mixture. Furthermore, it demonstrates with reference to figures.

In the example shown in FIGS. 5A to 5C, FIG. 5A shows the plane of one display unit in the color information display panel, and FIG. 5B shows the AA line in FIG. 5C shows a cross section taken along line BB in FIG. 5A. In this example, four cells formed by the partition walls 24 correspond to four pixels on a one-to-one basis, and an example is shown in which one display unit is configured by four pixels.
Here, one electrode pair formed by orthogonally intersecting the line electrodes 25 and 26 corresponds to the color filter 32 formed on the heat-fusible colorless and transparent film layer 1. The area of each color filter (32R, 32G, 32BL) formed on the heat-fusible colorless and transparent film layer 1 is smaller than one pixel area (L1 × L2). Then, as shown in FIG. 5A, the color filter 32 is arranged so as to be at the center position with respect to the corresponding pixel, and the pixel and color filter on one side L (L1 or L2) of the corresponding square. Is set to t0 (t0-1 or t0-2), and the color filter reduces the length of the two pairs of opposite sides of the corresponding pixel to be shorter than the length of the two pairs of opposite sides of the corresponding pixel. The color filter is arranged so as to be smaller than the area of the color filter and arranged at the center position of the pixel so that the two sides of the color filter have the same length gaps (t0-1 and t0-2). The ratio Scf / Sd of the area Scf of the pixel and the area Sd of the pixel is set to be 50% or more. In this example, t0-1 and t0-2 are provided with the same length. Moreover, the area of each color filter formed in the heat-fusible colorless and transparent film layer is smaller than the pixel area (L1 × L2).
One electrode pair formed by orthogonally intersecting the line electrodes 25 and 26 in this way is associated with each color filter 32R, 32G, 32BL on the color filter substrate 41. Then, a partition wall 24 is formed on the display surface side panel substrate 5 side having the line electrode 26, and the partition wall 24 and the back side panel substrate 21 are bonded together with an adhesive 27.

  The color information display panel shown in FIG. 5 is formed of a transparent line electrode obtained by patterning an ITO film, and a heat-sealable colorless transparent film layer 1 is provided on the opposite surface of the transparent substrate 5 and the surface thereof is provided on the surface. Concavities and convexities are formed with a roughness Ra in the range of 0.1 μm to 2 μm, and color ink is disposed on the concave and convex surfaces by an ink jet printing method, and then the ink is solidified to obtain a color filter 32. In addition, a colorless and transparent polyethylene terephthalate film (PET film) 3 serving as a protective layer is placed on the color filter, and then pressed together with heat to melt and solidify the heat-fusible colorless and transparent film layer to make the PET film 3 transparent. Affixed to the panel substrate.

6 shows the color information display panel as in FIG. 5, FIG. 6 (a) shows a plane of one display unit in the color information display panel, and FIG. 6 (b) shows A in FIG. 6 (a). The cross section along the line -A is shown, and FIG. 6C shows the cross section along the line BB in FIG. Also in this example, four cells formed by the partition walls 24 correspond to four pixels on a one-to-one basis, and an example of one display unit with four pixels is shown.
The color information display panel shown in FIG. 5 is an example in which the partition wall 24 is formed on the color filter substrate 41 side, while FIG. 6 shows the case in which the partition wall 24 is formed on the back substrate 21 side. Other configurations in FIG. 6 are the same as those described in FIG.

  Next, in the example shown in FIGS. 7A and 7B, FIG. 7A shows a plane of one display unit in the color information display panel, and FIG. 7B shows A in FIG. The cross section along line -A is shown. In this example, a striped color filter 32 is formed in parallel with a line electrode serving as a pixel electrode. In this case, the color filter makes the length of one set of opposite sides of the corresponding pixel shorter than the length of one set of opposite sides of the corresponding pixel, thereby reducing the area of the pixel, As a result, the ratio Scf / Sd of the area Scf of the color filter and the area Sd of the pixel is 50% or more so that the color filter has the same length gap (t0-1) on both sides of one side of the color filter. It is provided to become. In this example, the area of each color filter formed on the panel base 5 is smaller than the pixel area (L1 × L2).

Next, in the example shown in FIGS. 8A and 8B, FIG. 8A shows a plane of one display unit in the color information display panel, and FIG. 8B shows A in FIG. 8A. The cross section along line -A is shown. In the case of this example as well, in the same manner as the information display panel shown in FIG. 7, the stripe-shaped color filter 32 is formed in parallel with the line electrode serving as the pixel electrode. In this case, the color filter makes the length of one set of opposite sides of the corresponding pixel shorter than the length of one set of opposite sides of the corresponding pixel, thereby reducing the area of the pixel, As a result, the ratio Scf / Sd of the area Scf of the color filter and the area Sd of the pixel is 50% or more so that the color filter has the same length gap (t0-1) on both sides of one side of the color filter. It is provided to become. In this example, the area of each color filter formed on the panel base 5 is smaller than the pixel area (L1 × L2).
In the example of FIG. 8, a rib-shaped light shielding material (here, the black light shielding material 28) is formed together with the color filter 32. The black light shielding material 28 exists between a set of three primary color filters, and the color filter 32 and the black light shielding material 28 are arranged so as to have a gap between them in the same plane. Thus, the information display panel can display the display screen more clearly and neatly. Here, the case where a black light shielding material is employed as an example is illustrated, but other color light shielding materials can be appropriately employed as necessary.

Further, the color filter substrate 41 may have a configuration in which the color filter 32 is disposed inside the panel substrate 5, contrary to the above, and in this case, the heat-sealable colorless transparent film layer on the panel substrate 5. A transparent film with a transparent conductive film is superimposed on the color filter formed on the surface with the surface on which the conductive film is not formed facing the color filter, and then the film with the conductive film and the panel substrate 5 are overlapped. Are pressed together with heat, the heat-fusible film layer 1 is melted and solidified, and a film with a conductive film can be bonded onto the color filter layer formed on the panel substrate 5 by the same action as the adhesive. Furthermore, the color filter makes the length of one set of opposite sides of the corresponding pixel shorter than the length of one set of opposite sides of the corresponding pixel, thereby making the area smaller than the area of the work and the center position of the pixel. By arranging in this way, the ratio Scf / Sd of the area Scf of the color filter and the area Sd of the pixel is 50% or more so as to have a gap (t0-1) of the same length on both sides of one of the color filters. It is preferable to provide it as follows.
At this time, when the thickness of the film with the conductive film is 25 μm to 200 μm, it is preferable because parallax can be reduced when observed from an oblique direction. Furthermore, it demonstrates with reference to figures.

In the example shown in FIGS. 9A and 9B, FIG. 9A shows the plane of one display unit in the color information display panel, and FIG. 9B shows the AA line in FIG. 9A. The cross section along is shown. In this example, a striped color filter 32 is formed in parallel with a line electrode serving as a pixel electrode. In this case, the color filter makes the length of one set of opposite sides of the corresponding pixel shorter than the length of one set of opposite sides of the corresponding pixel, thereby reducing the area of the pixel, As a result, the ratio Scf / Sd of the area Scf of the color filter and the area Sd of the pixel is 50% or more so that the color filter has the same length gap (t0-1) on both sides of one side of the color filter. It is provided to become. Also in this example, the area of each color filter formed on the heat-fusible colorless and transparent film layer is smaller than the pixel area (L1 × L2).
FIG. 9 shows a structure in which the color filter 32 is disposed inside the panel substrate 5. For this purpose, the transparent PET film 29 is disposed and the heat-sealable colorless and transparent film layer 1 is present.

Next, in the example shown in FIGS. 10A and 10B, FIG. 10A shows a plane of one display unit in the color information display panel, and FIG. 10B shows A in FIG. The cross section along line -A is shown. In the case of this example as well, in the same manner as the information display panel shown in FIG. 9, the stripe-shaped color filter 32 is formed in parallel with the line electrode serving as the pixel electrode. In this case, the color filter makes the length of one set of opposite sides of the corresponding pixel shorter than the length of one set of opposite sides of the corresponding pixel, thereby reducing the area of the pixel, As a result, the ratio Scf / Sd of the area Scf of the color filter and the area Sd of the pixel is 50% or more so that the color filter has the same length gap (t0-1) on both sides of one side of the color filter. It is provided to become. Also in this example, the area of each color filter formed on the heat-fusible colorless and transparent film layer is smaller than the pixel area (L1 × L2).
In the example of FIG. 10, a rib-shaped light shielding material (here, the black light shielding material 28) is formed together with the color filter 32. The black light shielding material 28 exists between a set of three primary color filters, and the color filter 32 and the black light shielding material 28 are arranged so as to have a gap between them in the same plane. Thus, the information display panel can display the display screen more clearly and neatly.

  As a suitable example of the information display panel capable of color display, which is an object of the present invention, each of R: red, G: green, BL: blue, C: cyan, M: magenta, Y: yellow A color filter of a color is arranged in each pixel, and a display unit pixel is constituted by a 3 × 1 pixel arrangement with these three pixels, or another pixel adjacent to this three pixel and no color filter is arranged. A display unit pixel can be configured with four pixels, and a 2 × 2 pixel array or a 4 × 1 pixel array can be formed.

  In addition, after disposing the heat-sealable colorless and transparent film layer 1 on the transparent panel substrate 5, the panel substrate 5 is formed at a temperature lower than 50 ° C. by using a flat plate or roller-shaped hot press. Surface unevenness treatment may be performed. Further, after the heat-sealable colorless and transparent film layer 1 is disposed on the outer surface of the transparent panel substrate of the panel structure in which the display medium is disposed in the opposing space between the two panel substrates. The panel structure may be subjected to uneven treatment on the surface of the film layer 1 at a temperature lower than 50 ° C. using a plate-like or roller-like hot press plate.

  The panel substrate to which the present invention is applied can take various forms. This embodiment will be described with reference to the drawings. FIGS. 11A and 11B are views showing an example of the form of the panel substrate 5. As described above, the heat-sealable colorless and transparent film layer 1 subjected to the unevenness treatment is disposed on one surface of the panel substrate 5, but the other surface on the opposite side is formed in an appropriate shape. The transparent electrode 26 may be formed of the transparent conductive film. The color filter 32 is formed with a smaller area size than the pixel in accordance with the pixel position when the panel structure is formed.

As the transparent electrode 26 provided on the observation side panel substrate, indium tin oxide (ITO), indium oxide, zinc-doped indium oxide (IZO), aluminum-doped zinc oxide (AZO), antimony tin oxide (ATO), conductive tin oxide And transparent conductive metal oxides such as conductive zinc oxide, and transparent conductive polymers such as polyaniline, polypyrrole, and polythiophene.
In addition, as an electrode provided on the back side substrate disposed to face the transparent electrode 26, indium tin oxide (ITO), indium oxide, zinc doped indium oxide (IZO), aluminum doped zinc oxide (AZO), antimony tin oxide (ATO), conductive metal oxides such as conductive tin oxide and conductive zinc oxide, conductive polymers such as polyaniline, polypyrrole and polythiophene, metals such as gold, silver, copper, aluminum, nickel and chromium, And alloys containing these metals as main components. The electrode provided on the back side substrate may be transparent or may not be transparent.

As a method for forming an electrode, a method of forming the above-described material into a thin film by sputtering, vacuum deposition, CVD (chemical vapor deposition), coating, or the like, a method of laminating a metal foil (for example, rolled copper foil), A method in which a conductive agent is mixed with a solvent or a synthetic resin binder and applied. The above-mentioned material that can be patterned and is electrically conductive can be preferably used. In addition, the electrode thickness on the display surface side is not particularly limited as long as the conductivity can be secured and the light transmittance is not hindered. Moreover, the back side electrode thickness should just ensure electroconductivity, 0.01-10 micrometers is preferable and 0.05-5 micrometers is more preferable.
A conductive material composed of a transparent metal oxide suitable as an electrode provided on the observation-side substrate is less flexible than a metal material. When an electrode is provided on the observation-side substrate using a metal oxide, it is preferably used in combination with a thin metal wire in order to prevent disconnection in the transparent electrode material. The width of the fine metal wire is preferably 1 μm to 10 μm because it does not hinder display visibility. Since the electrode provided on the back side substrate does not need to consider light transmittance, the metal material having low electrical resistance and excellent flexibility is preferably used. The thickness of the back electrode is designed to be 0.01 to 10 μm from the viewpoint of electrical resistance, productivity, and cost.

  FIG. 12 is a diagram showing a formation example when the produced color filter substrate is applied to the observation-side panel substrate 5 of the color information display panel. (A) is an example when the partition wall 24 is formed on the transparent panel substrate 5 on the observation side, and (b) is an example when the partition wall 24 is formed on the back substrate 21 on the opposite side.

Furthermore, FIG. 13 shows an observation side panel substrate 5 of a structure (hereinafter referred to as a panel structure PS) immediately before a display medium is arranged in a space facing two substrates to form a color information display panel. It is the figure which showed the example of formation in the case of applying.
In the steps 1- (a) to 1- (c), the film layer 1 disposed on the panel substrate 5 is subjected to uneven processing and the color filter 32 is printed, and then the protective transparent film 3 is disposed and the plate heat is applied. A color information display panel CDP having a color filter substrate 41 integrated thereon via a heat-fusible film (film layer 1) is manufactured by pressing or heat roller pressing. In step 1- (b) shown here, the heat-fusible film layer 1 is provided only on the panel substrate 5. The steps 2- (a) to 2- (c) are the same as above, but in 2- (b), the heat-fusible film layer 1 is also provided on the panel substrate 5 and on the lower side of the film 3. ing.
As described above, the panel substrate of the color information display panel to which the present invention is applied may have various forms (states).

FIG. 14 is a view showing a process example that can be adopted when the film layer 1 (heat-sealable colorless transparent film layer) is disposed on the panel substrate 5.
FIG. 14 shows a process of forming an uneven surface DPa with a predetermined surface roughness on the release film DP, transferring the unevenness to the film layer 1 (heat-sealable colorless transparent film layer), and subjecting the surface 1a to an uneven process. The example of the process to include is shown. A release film DP is prepared, an uneven surface DPa is formed on the surface through a roller-type press RL having surface unevenness, and the film layer 1 is disposed on the uneven surface DPa later (FIG. 14C). ). Then, when the release film DP having the film layer 1 is disposed on the panel substrate 5 as shown in FIG. 14D and the release film DP is peeled off as shown in FIG. A panel substrate on which the applied film layer 1 is formed can be obtained.

  FIG. 15 illustrates the case where irregularities are formed on the surface 1a of the film layer 1 through the release film DP as in FIG. 14, but the form on the panel substrate 5 side on which the film layer 1 is arranged is different. Yes. In FIG. 15, the film layer 1 is disposed on the panel substrate 5 of the panel structure PS (FIG. 15 (d)), and thereafter the surface film 1a is subjected to uneven treatment by peeling off the release film DP as shown in (e). A panel structure PS provided with the applied film layer 1 can be obtained.

  The method for manufacturing the color filter substrate has been described above with reference to the drawings. The color filter substrate manufactured by such an excellent manufacturing method is incorporated into the color information display panel shown in FIG. 1 to FIG. Can be provided as a panel. That is, the color filter substrate manufactured by the above-described method for manufacturing a color filter substrate is used as an observation side panel substrate, and color information with high display performance is provided by a configuration in which a display medium is arranged in a space facing the other back side panel substrate. Display panels can be manufactured.

Hereinafter, the preferred structure of the color information display panel according to the present invention will be described more specifically.
The observation side panel substrate is a transparent glass substrate or a transparent resin film substrate, and the resin material is polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polyethersulfone (PES), triacetyl cellulose. (TAC) is preferably used. When the color filter is arranged on the outer surface of the panel substrate, the parallax generated when the panel substrate is thick when viewed from the front and when viewed from an oblique direction will affect the display image quality. The thickness is in the range of 25 μm to 200 μm, more preferably in the range of 25 μm to 100 μm. When a color filter is disposed on the inner surface of the panel substrate, a general-purpose 700 μm thick glass substrate can also be suitably used. In order to obtain a thin information display panel, it is preferably used in a range of 25 μm to 2000 μm.

  In addition, the colorless and transparent film disposed in the outermost layer of the panel substrate as a protective layer of the color filter is a resin such as polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polyethersulfone (PES) triacetyl cellulose (TAC), etc. A sheet or a glass sheet is preferably used, and the thickness thereof is not particularly limited. The colorless and transparent film that is bonded as a colorless and transparent film with a conductive film on the color filter formed on the inner surface of the panel substrate displays the parallax that occurs between when viewed from the front and when viewed from an oblique angle. Since the image quality is affected, the thickness is preferably in the range of 25 μm to 200 μm, more preferably in the range of 25 μm to 100 μm.

<Example> The area Scf of the color filter manufactured in the example described below is a color filter having a small area with respect to the area Sd of the pixel. When forming the color filter by the flexographic printing method, the RGB color filters are arranged in a stripe shape, and the stripe color filters of each color are formed continuously, with a gap on both sides and a pixel area Sd. A color filter was formed with an area of 50%. When forming a color filter by the ink jet printing method, a configuration in which a color filter arrangement portion of RGB three colors and a portion where no color filter is arranged (colorless and transparent portion: expressed as T) are arranged in a 2 × 2 arrangement in accordance with pixels. The color filters for each color of RGBT were formed in a dot shape, and a color filter was formed with an area of 50% of the area Sd of the pixel with gaps on both the left, right, top and bottom sides.

Example 1
An ethylene-vinyl acetate copolymer resin (EVA resin) film having a thickness of 5 μm was formed on a transparent polyethylene terephthalate film panel substrate (PET film) having a thickness of 125 μm. Next, this PET film with an ethylene-vinyl acetate copolymer resin (EVA resin) film is pressed using a roller plate having surface irregularities with a surface roughness Ra of 1 μm without applying heat to the roller. Surface irregularities having a surface roughness Ra of 1 μm were formed on an ethylene-vinyl acetate copolymer resin (EVA resin) film. On top of this, color filter ink is printed at a predetermined position corresponding to a pixel pixel by an ink jet method, and red (R), blue (B), and green (G) color filters are sequentially formed. A color filter was prepared. The ink droplets were controlled to 6 to 30 picoliters and the color filter ink was disposed, and then the ink was cured to form a color filter. The color filter area Scf is 50% of the pixel area Sd, so that the color filter has a smaller area than the pixels. As the color filter ink, a photocurable color filter ink was used. DCE-A (dimethylol cyclodecane di-7 acrylate) manufactured by Kyoeisha Co., Ltd. was used as the acrylic monomer as the main component of the ink. As the ink curing agent, Irgacure 184 of Ciba Specialty Chemicals, which is a photoinitiator, was used. The thickness of the color filter was adjusted to be 1.5 μm.

(Example 2)
An ethylene-vinyl acetate copolymer resin (EVA resin) film having a thickness of 5 μm was formed on a panel substrate (PET film) made of a transparent polyethylene terephthalate film having a thickness of 200 μm. Next, this PET film with an ethylene-vinyl acetate copolymer resin (EVA resin) film is pressed using a roller plate having surface irregularities with a surface roughness Ra of 1 μm without applying heat to the roller. Surface irregularities having a surface roughness Ra of 1 μm were formed on an ethylene-vinyl acetate copolymer resin (EVA resin) film. On top of this, color filter ink was placed at a predetermined position corresponding to the pixel pixel by a flexographic printing method and cured to prepare a color filter. The area Scf of the color filter is 80% of the area Sd of the pixel, and the color filter has a smaller area than the pixel. A photocurable color filter ink was obtained by dispersing red, blue, and green pigments in an ultraviolet curable flexo ink, respectively. Irgacure 184 from Ciba Specialty Chemicals was used as a photoinitiator as a curing agent. Using the R, G, and B color flexo inks, striped color filters were sequentially printed. An anilox roll having 500 lines was used, and the thickness of the color filter was adjusted to 1.5 μm.

(Example 3)
An ethylene-vinyl acetate copolymer resin (EVA resin) film having a thickness of 5 μm was formed on a transparent glass panel substrate having a thickness of 200 μm. Next, this glass substrate with an ethylene-vinyl acetate copolymer resin (EVA resin) film is pressed using a roller plate having surface irregularities with a surface roughness Ra of 1 μm without applying heat to the roller. Surface irregularities having a surface roughness Ra of 1 μm were formed on an ethylene-vinyl acetate copolymer resin (EVA resin) film. On top of this, color filter ink is printed at a predetermined position corresponding to a pixel pixel by an ink jet method, and red (R), blue (B), and green (G) color filters are sequentially formed. A color filter was prepared. The ink droplets were controlled to 6 to 30 picoliters and the color filter ink was disposed, and then the ink was cured to form a color filter. The color filter area Scf is 96% of the pixel area Sd, and the color filter has a smaller area than the pixels. As the color filter ink, a photocurable color filter ink was used. DCE-A (dimethylol cyclodecane di-7 acrylate) manufactured by Kyoeisha Co., Ltd. was used as the acrylic monomer as the main component of the ink. As the ink curing agent, Irgacure 184 of Ciba Specialty Chemicals, which is a photoinitiator, was used. The thickness of the color filter was adjusted to be 1.5 μm.

Example 4
An ethylene-vinyl acetate copolymer resin (EVA resin) film having a thickness of 5 μm was formed on a transparent glass panel substrate having a thickness of 200 μm. Next, this glass substrate with an ethylene-vinyl acetate copolymer resin (EVA resin) film is pressed using a roller plate having surface irregularities with a surface roughness Ra of 1 μm without applying heat to the roller. Surface irregularities having a surface roughness Ra of 1 μm were formed on an ethylene-vinyl acetate copolymer resin (EVA resin) film. On top of this, color filter ink was placed at a predetermined position corresponding to the pixel pixel by a flexographic printing method and cured to prepare a color filter. The color filter area Scf is 65% of the pixel area Sd, so that the color filter has a smaller area than the pixels. A photocurable color filter ink was obtained by dispersing red, blue, and green pigments in an ultraviolet curable flexo ink, respectively. Irgacure 184 from Ciba Specialty Chemicals was used as a photoinitiator as a curing agent. Using the R, G, and B color flexo inks, striped color filters were sequentially printed. An anilox roll having 500 lines was used, and the thickness of the color filter was adjusted to 1.5 μm.

An information display panel using the color filter substrate prepared in Examples 1, 2, 3, and 4 as an observation side panel substrate was prepared, a test pattern by a color image was displayed, and the display state was visually observed and evaluated. . The information display panel used for the evaluation is a dot matrix type which is driven by passively applying an electric field from an electrode pair formed by crossing the ITO stripe electrodes so as to cross each other at the same time as the observation side panel substrate. As produced. The black particle group serving as the black display medium and the white particle group serving as the white display medium disposed in the cell are as follows, and are arranged so that the volume occupancy is 25% in total in the cell. did.
(Black particle group: K1)
100 parts by weight of polymethylpentene polymer (TPX-R18: manufactured by Mitsui Chemicals), 5 parts by weight of carbon black (special black 4: manufactured by Degussa) as a colorant, and nigrosine compound (Bontron NO7 as a positively charged charge control agent) : Orient Chemical) 3 parts by weight is melt-kneaded with a twin-screw kneader and finely pulverized with a jet mill (Lab Jet Mill IDS-LJ type: Nippon Pneumatic Co., Ltd.). -2: Nippon Pneumatic Industry), and spheroidizing using a melt spheronizer (MR-10: Nippon Pneumatic Industry), and a group of positively charged black particles having an average particle size of 9.2 μm Got.
(White particle group: W1)
100 parts by weight of polymethylpentene polymer (TPX-R18: manufactured by Mitsui Chemicals), 100 parts by weight of titanium dioxide (Taipaque CR-90: manufactured by Ishihara Sangyo Co., Ltd.) as a colorant, and phenol-based condensation as a negative charge control agent 5 parts by weight of the product (Bontron E89: manufactured by Orient Chemical Co., Ltd.) is melt-kneaded with a twin-screw kneader, finely pulverized with a jet mill (Lab Jet Mill IDS-LJ type: manufactured by Nippon Pneumatic Co., Ltd.), and classified. Machine (MDS-2: Nippon Pneumatic Industry), and then spheronized using a melt spheronizer (MR-10: Nippon Pneumatic Industry), with an average particle size of 9.5 μm and negatively charged A white particle group was obtained.

(Example 5)
On the observation side panel substrate of a panel structure (panel precursor for information display) composed of a transparent polyethylene terephthalate film (PET film) with a thickness of 125 μm as a panel substrate, ethylene-vinyl acetate co-polymerized with a thickness of 5 μm A coalesced resin (EVA resin) film was formed. Next, this roller structure having a surface roughness Ra having a surface roughness Ra of 1 μm is not applied to the roller of this panel structure made of PET film with an ethylene-vinyl acetate copolymer resin (EVA resin) film. The surface roughness Ra having a surface roughness Ra of 1 μm was formed on the ethylene-vinyl acetate copolymer resin (EVA resin) film. On top of this, color filter ink is printed at a predetermined position corresponding to a pixel pixel by an ink jet method, and red (R), blue (B), and green (G) color filters are sequentially formed. A color filter was prepared. The ink droplets were controlled to 6 to 30 picoliters and the color filter ink was disposed, and then the ink was cured to form a color filter. The color filter area Scf is 75% of the pixel area Sd, so that the color filter has a smaller area than the pixels. As the color filter ink, a photocurable color filter ink was used. DCE-A (dimethylol cyclodecane di-7 acrylate) manufactured by Kyoeisha Co., Ltd. was used as the acrylic monomer as the main component of the ink. As the ink curing agent, Irgacure 184 of Ciba Specialty Chemicals, which is a photoinitiator, was used. The thickness of the color filter was adjusted to be 1.5 μm. In Example 5, a PET observation side panel substrate and a PET back side panel substrate were produced as a dot matrix type that is passively driven by applying an electric field from an electrode pair formed by crossing the ITO stripe electrodes so as to face each other. A precursor panel was used. In this precursor panel, the black display medium, the black particle group, and the white particle group as the white display medium, which are the same as described above, are arranged in the cell so as to have a volume occupancy rate of 25% in total. . A color filter is formed on the observation-side panel substrate of the precursor panel, an information display panel for evaluation is produced with the configuration shown in FIG. 13A, a test pattern is displayed by a color image, and its display state Was evaluated by visual observation.

<Comparative Example 1> Information display for evaluation was performed in the same manner as in Example 1 except that the color filter area Scf was 45% of the pixel area Sd and the area was smaller than that of the pixel. A panel was prepared, a test pattern with a color image was displayed, and the display state was visually observed and evaluated.

  In flexographic printing used when manufacturing the information display panel of the above embodiment, the color filter can be formed in a continuous stripe shape. That is, each color filter of RGB (or RGBT) or YMC (or YMCT) is formed in a line shape narrower than the pixel pixel, so that there is a gap between the color filters. In this case, since the color filters of the same color are continuous, the line-shaped color filter is not divided by the light shielding material, and a rib-shaped light shielding material is provided between the striped color filters.

  In flexographic printing, the color filter can be formed in a striped shape. That is, each color filter of RGB (or RGBT) or YMC (or YMCT) is formed in a line shape shorter in length than the pixel pixel, so that there is a gap between the color filters and between the same color filters. Become. It can be set as the structure by which a light shielding material is arrange | positioned in the clearance gap between this line-shaped color filter. The information display panel for evaluation produced in Examples 1 to 5 and Comparative Example 1 was driven to display a test pattern with a color image, and the display state was visually observed. Although the information display panels of Examples 1 to 5 were all capable of displaying a color image that can be determined to be good, the information display panel of Comparative Example 1 is good in that the image is blurred and the color is not clear. Only color images that could not be said were obtained. It is considered that the color filter area Scf was too small, 45% with respect to the pixel area Sd, so that the effect as a color filter could not be realized.

According to the present invention, since the color filter is formed by a printing method such as ink jet printing or flexographic printing on the heat-fusible colorless transparent film layer having irregularities formed on the surface, the ink does not spread and is placed at a predetermined position. A film with a color filter in which color filters are arranged at a predetermined interval with high accuracy can be obtained. Based on this, a color filter substrate for a color information display panel and a color information display panel can be manufactured accurately and efficiently.
In addition, when a film for protecting the color filter is provided, the surface of the heat-sealable colorless transparent film layer on which the color filter is formed has irregularities so that no bubbles remain at the interface with the protective film. Can be pasted together. Thereby, it is possible to further improve the display image quality and provide an excellent color filter substrate and color information display panel.

DESCRIPTION OF SYMBOLS 1 Heat-sealable colorless transparent film layer 1a Irregular surface 5 Panel substrate 26 Transparent electrode (transparent conductive film)
32 Color filter 32R Red color filter 32G Green color filter 32BL Blue color filter 41 Color filter substrate DP Release film PS Panel structure CDP Color information display panel

Claims (15)

A heat-sealable, colorless and transparent film layer that has been subjected to uneven treatment is disposed on one surface of a transparent panel substrate, and different color filters are formed on the uneven surface of the heat-sealable colorless and transparent film layer with a gap therebetween. A method for producing a color filter substrate, characterized in that: The method for producing a color filter substrate according to claim 1, wherein a transparent conductive film is formed on the other surface of the transparent panel substrate. A colorless and transparent film is further stacked on the color filter, and then the heat-fusible and colorless and transparent film layer is melted and solidified by pressing with heat, whereby the colorless and transparent film is placed on the color filter. The method for producing a color filter substrate according to claim 1, wherein the color filter substrate is bonded to the substrate. 4. The color filter according to claim 1, wherein the different color filter is formed by printing color ink on the uneven surface of the heat-fusible colorless transparent film layer. 5. A method for manufacturing a substrate. 5. A color ink is printed on the concavo-convex surface of the heat-fusible colorless and transparent film layer, and the color filter and the rib-shaped light shielding material are formed so as to have a gap therebetween. The manufacturing method of the color filter board | substrate of any one of these. Each color filter is smaller than the area of the pixel by making the length of at least one pair of opposite sides of the corresponding pixel shorter than the length of one set of opposite sides of the corresponding pixel. By arranging in such a manner that a gap having the same length is provided on at least one side of the color filter, the ratio Scf / Sd of the area Scf of the color filter and the area Sd of the pixel is 50% or more. The method for manufacturing a color filter substrate according to claim 1, wherein the color filter substrate is provided. 7. The color filter substrate according to claim 1, wherein a surface roughness Ra of the heat-fusible colorless and transparent film layer subjected to the unevenness treatment is 0.1 μm to 2 μm. Production method. A method for manufacturing a color information display panel, in which a color information is displayed by electrically driving a display medium disposed in a facing space between two panel substrates transparent at least one using a color filter Because
The color filter substrate manufactured by the method for manufacturing a color filter substrate according to claim 1 is used as an observation side panel substrate, and after disposing a display medium in a facing space of the other back side panel substrate substrate, A method for producing a color information display panel, which is produced by bonding. A method for manufacturing a color information display panel capable of color-displaying an information image by electrically driving a display medium disposed in a facing space between two substrates, at least one of which is transparent, using a color filter,
On the outer surface of the observation-side transparent substrate of the panel structure in which the display medium is disposed in the space between the two substrates transparent at least one, a heat-sealable colorless transparent film layer having been subjected to unevenness processing is disposed In the state, another color filter is formed on the uneven surface of the heat-fusible colorless transparent film layer with a gap between each other, and the colorless transparent film is further stacked on the formed color filter, and then with heat. A method for producing a color information display panel, wherein the colorless and transparent film is bonded onto the color filter by pressing. The method for producing a color information display panel according to claim 9, wherein the color filter is formed by printing color ink on the uneven surface of the heat-fusible colorless transparent film layer. 11. A color ink is printed on the uneven surface of the heat-fusible colorless and transparent film layer, and the color filter and the rib-shaped light shielding material are formed so as to have a gap therebetween. The manufacturing method of the panel for color information displays of any one of these. Each color filter is smaller than the area of the pixel by making the length of at least one pair of opposite sides of the corresponding pixel shorter than the length of one set of opposite sides of the corresponding pixel, and the center position of the pixel By arranging in such a manner that a gap having the same length is provided on at least one side of the color filter, the ratio Scf / Sd of the area Scf of the color filter and the area Sd of the pixel is 50% or more. The method for producing a color information display panel according to claim 9, wherein the color information display panel is provided. 13. The color information display according to claim 8, wherein a surface roughness Ra of the heat-sealable colorless and transparent film layer subjected to the unevenness treatment is 0.1 μm to 2 μm. Panel manufacturing method. A color information display panel capable of color-displaying an information image by electrically driving a display medium arranged in a facing space between two panel substrates, at least one of which is transparent, using a color filter,
A color information display panel obtained by the method for manufacturing a color information display panel according to any one of claims 8 to 13. The different color filter is composed of any one of three primary color filters or four color filters of three primary colors and colorless and transparent, and the display medium is configured as a particle group including white particles having charging properties. 15. The display device according to claim 14, wherein the display medium includes two types of display media, a white display medium and a black display medium configured as a particle group including black particles having charging properties opposite to the charging properties. The color information display panel described.

Images