JP2007298632A - Method of manufacture color filter, method and equipment of manufacturing color display, and electronic equipment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method facilitating a manufacturing process of a color display using a color filter while using the conventional manufacturing line as it is. <P>SOLUTION: The method of manufacturing the color display comprises: displaying a pattern corresponding to a color pattern on a monochromatic display unit; and forming a coloring layer of a prescribed color by matching the display face of the monochromatic display unit with the displayed pattern. An electrophoresis device provided with an electrophoresis layer interposing a dispersion liquid containing electrophoresis particles between a first electrode and a second electrode is preferably used as the monochromatic display unit. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a manufacturing technique of a display using a color filter, and relates to a colorization technique for an electrophoretic display device including a liquid crystal, an electronic powder fluid, an electrochromic material, and in particular, a dispersion medium containing electrophoretic particles.

  An electrophoretic display device has attracted attention as a new display from the viewpoints of a simple configuration, a wide viewing angle, low power consumption, display image holding performance (memory property), and the like. Generally, there is a method of using a color filter having a color pattern corresponding to R (red), G (green), and B (blue) for each pixel as a method for full color display.

In the case of manufacturing a color display using a color filter, conventionally, after forming a display material such as an electrophoretic element, a liquid crystal, an electronic powder fluid, an electrochromic, an organic EL element on the surface of the driving element, a color filter is formed on the display material. It was manufactured by pasting together. In this method, when the color filter is bonded, it is necessary to align the substrate on which the drive element is formed and the color filter, the assembly work is complicated, and the assembly process is required to be simplified. Under such circumstances, as a method of manufacturing a color display using a color filter, for example, Japanese Patent Application Laid-Open No. 2004-62040 (Patent Document 1) includes a method of forming a colored layer at a position corresponding to each pixel by an inkjet method. Are listed.
JP 2004-62040 A

  However, in the above method, since the manufacturing process needs to be changed as a whole, the conventional manufacturing line cannot be used as it is. Therefore, it is required to develop a method for facilitating the assembly process while utilizing the conventional production line as it is.

  On the other hand, since a color filter is expensive, development of a method capable of reducing the manufacturing cost of the color filter is desired.

  Therefore, a first object of the present invention is to provide a method for facilitating the manufacturing process of a color display using a color filter while utilizing a conventional manufacturing line as it is. The second object of the present invention is to provide a method capable of easily manufacturing a color filter.

  In order to solve the above problems, the present invention displays a pattern corresponding to a color pattern on a monochrome (single color or monochrome) display, and the pattern displayed on the display surface of the monochrome display. The manufacturing method of a color display including the process of forming the coloring layer of a predetermined color according to is provided.

  According to this, since it is not necessary to align the substrates as in the case where the color filter and the pixel electrode are formed on separate substrates, the assembly process is easy even in the case of a high-definition display. Can be facilitated. In addition, since one color pattern of a plurality of color patterns of the color filter is displayed on the monochrome display, and a colored layer is formed on the display surface according to the color pattern, a conventionally used monochrome display is manufactured. The line can be used as it is, and the manufacturing cost can be reduced.

  When the said color pattern is comprised from a several color, it is preferable to display a pattern for every color and to form a colored layer. Thereby, formation of the colored layer for each color becomes easy.

  According to another aspect of the present invention, a pattern corresponding to a color pattern is displayed on a monochrome display, a bank is formed along the edge of the pattern on the display surface of the monochrome display, and the bank is surrounded by the bank. A method for manufacturing a color display including a step of forming a colored layer of a predetermined color in a region.

  According to this, since it is not necessary to align the substrates as in the case where the color filter and the pixel electrode are formed on separate substrates, the assembly process is easy even in the case of a high-definition display. Can be facilitated. In addition, since a pattern corresponding to a color pattern is displayed on a monochrome display, a bank is formed in accordance with the pattern, and a colored layer is formed, it is possible to use a monochrome display production line that has been conventionally used as it is. Manufacturing cost can be reduced. Furthermore, by forming a bank, it is possible to prevent color bleeding between pixels.

  The monochrome display device is an electrophoretic device provided with an electrophoretic layer in which a dispersion containing an electropowder fluid, electrochromic or electrophoretic particles is interposed between the first electrode and the second electrode. Is preferred. The electrophoretic device requires the application of an external voltage when writing a pattern, but once written, the memory holds that the display is held by the charge stored in each electrode even after the external voltage is cut off. Therefore, it is possible to place the display on the production line without supplying power, and mass production becomes easy.

  The colored layer is preferably formed by an inkjet method. According to this, it is not necessary to perform a complicated process as in the case of using a photolithography technique, and a predetermined amount can be supplied to a predetermined location, so that waste of the colorant can be avoided.

  The bank is preferably formed by an ink jet method. According to this, it is not necessary to perform a complicated process as in the case of using a photolithography technique, and a predetermined amount can be supplied to a predetermined location, so that waste of bank forming material can be avoided.

  According to still another aspect of the present invention, a pattern corresponding to a color pattern is displayed on a monochrome display, and a predetermined color is colored in accordance with the pattern on a transparent substrate placed on the display surface of the monochrome display. A method for producing a color filter for forming a layer is provided.

  According to this, since the color filter is formed in accordance with the pattern displayed on the monochrome display, it is possible to easily manufacture color filters of various color patterns.

  When the color pattern is composed of a plurality of colors, it is preferable to form a colored layer by displaying the pattern for each color. Thereby, formation of the colored layer for each color becomes easy.

  According to still another aspect of the present invention, a pattern corresponding to a color pattern is displayed on a monochrome display, and a bank is provided along an edge of the pattern on a transparent substrate placed on the display surface of the monochrome display. And a color filter manufacturing method for forming a colored layer of a predetermined color in a region surrounded by the bank.

  According to this, since the color filter is formed in accordance with the pattern displayed on the monochrome display, it is possible to easily manufacture color filters of various color patterns. Furthermore, by forming a bank, it is possible to prevent color bleeding between pixels.

  The monochrome display device is an electrophoretic device including an electrophoretic layer in which a dispersion containing an electropowder fluid, electrochromic or electrophoretic particles is interposed between the first electrode and the second electrode. Is preferred. The electrophoretic device requires the application of an external voltage when writing a pattern, but once written, the memory holds that the display is held by the charge stored in each electrode even after the external voltage is cut off. Therefore, it is possible to place the display on the production line without supplying power, and mass production becomes easy.

  Still another embodiment of the present invention is a method for manufacturing a color display in which a color filter manufactured using the above-described method for manufacturing a color filter is joined to a display surface of a monochrome display. According to this, since the manufacturing method of the color filter is used, the manufacturing cost of the color filter can be reduced, and the manufacturing cost of the color display can be reduced.

  The electronic apparatus of the present invention includes a color display manufactured by the above-described color display manufacturing method. Therefore, an inexpensive electronic device can be provided.

The color display manufacturing apparatus of the present invention includes a discharge head capable of discharging a colorant onto a display surface of a monochrome display, a moving unit configured to change a relative position between the discharge head and the monochrome display, and a monochrome display. An imaging unit that captures a pattern corresponding to the color pattern displayed on the display unit, and the moving unit are controlled so that the ejection head is relative to the monochrome display unit in accordance with the pattern acquired by the imaging unit. And a control means for moving the device.
Thereby, the manufacturing method of the color display and color filter which were mentioned above can be performed.

Hereinafter, the manufacturing method of the color display of this invention is demonstrated, referring drawings.
In the present embodiment, an electrophoretic display device including an electrophoretic display panel and a peripheral circuit will be described as the electrophoretic device.

  In the electrophoretic display panel, a transistor is formed for each pixel. The peripheral circuit includes an image processing circuit and a timing generator. Since the method of the present invention is characterized by a method for manufacturing an electrophoretic display panel, description of peripheral circuits is omitted.

(First embodiment)
FIG. 1 is a process diagram for explaining a color display manufacturing method according to a first embodiment of the present invention.

  As shown in FIG. 1A, an electrophoresis apparatus 2 is prepared as a monochrome display. Below, an example of the manufacturing method of the electrophoresis apparatus 2 is demonstrated.

First, on one surface of the first substrate 10 such as a glass substrate, a matrix display circuit including TFTs (thin film transistors), signal wirings, pixel electrodes (first electrodes) 14 arranged in a matrix, and the like is included. The thin film semiconductor circuit layer 12 is formed by a conventionally known method. As a method for forming the thin film semiconductor circuit layer 12, for example, a method for forming a thin film semiconductor circuit used in a liquid crystal display device described in JP-A-9-329706 can be used. Here, the material used for the pixel electrode 14 is not particularly limited. For example, ITO (Indium Tin Oxide: In ₂ O ₃ —SnO ₂ ) is used.

  In order to ensure insulation between the pixel electrodes 14, an insulating layer may be formed in the gap between the pixel electrodes 14 using polyimide resin, acrylic resin, silicon oxide, or the like.

Next, a thin film made of, for example, ITO (Indium Tin Oxide: In ₂ O ₃ —SnO ₂ ) is separately formed on the glass and film substrate (second substrate) 24 as the common electrode (second electrode) 22, A coating film made of a mixture of the microcapsules 16 and the binder 18 is formed on the common electrode 22. Specifically, for example, using a roll coater, the upper surface of the common electrode 22 is arranged so that only one microcapsule 16 is arranged in the thickness direction of the coating film. Apply almost uniformly.

  Here, the microcapsule 16 includes a dispersion liquid containing the electrophoretic particles 16a and the dispersion medium 16b. As the dispersion liquid, for example, a dispersion liquid dispersed in white titanium dioxide particles (electrophoretic particles 16a) and dodecylbenzene colored in black (dispersion medium 16b) is used. The dodecylbenzene 16b can be colored with anthraquinone or an azo black dye. In this dispersion, the titanium dioxide particles 16a are positively charged. The capsule membrane of the microcapsule 16 is made of, for example, a mixture of gum arabic and gelatin. As the binder 18, for example, a mixture of acrylic resin and silicone resin is used.

  Next, before the binder 18 is dried, the first substrate 10 and the second substrate 24 are bonded so that the pixel electrode 14 and the electrophoretic layer 20 face each other. The electrophoresis apparatus 2 is obtained by the above process.

  Next, as shown in FIG. 1B, the electrophoretic device 2 displays a pattern corresponding to the color pattern, and a colorant is dropped onto the display surface 26 of the electrophoretic device 2 by the ink jet method according to the displayed pattern. And a colored layer is formed.

  FIG. 2 shows a state in which a pattern corresponding to the color pattern is displayed on the electrophoresis apparatus 2. FIG. 2A is a schematic diagram of the electrophoretic device 2, and FIG. 2B is a partially enlarged view of a display unit of the electrophoretic device 2.

  In FIG. 2A, 201 is a data line driving circuit, and 202 is a scanning line driving circuit. The data line driving circuit 201 and the scanning line driving circuit 202 control driving of each pixel formed in a matrix. Specifically, ON / OFF of a desired pixel is controlled by selectively controlling driving of a TFT as a switching element formed for each pixel by a data line driving circuit 201 and a scanning line driving circuit 202. . The data line driving circuit 201 and the scanning line driving circuit 202 are electrically connected to an external circuit (not shown) via connection terminals 203a and 203b, respectively.

  For example, when forming a color pattern in which red (R) 30a, green (G) 30b, and blue (B) 30c as shown in FIG. As shown in FIG. 2B, only pixels corresponding to red (R) of the color pattern are displayed in black.

  In the present embodiment, positively charged white electrophoretic particles are used as the electrophoretic particles 16a. Therefore, a negative voltage with respect to the pixel electrode 14 of the pixel corresponding to red (R) with respect to the common electrode 22 is used. , And applying a positive voltage to the pixel electrodes 14 of the pixels other than the pixel corresponding to red (R) with reference to the common electrode 22, only the pixel corresponding to red (R) is displayed in black.

  Next, using the black display portion as an index, a red colorant is dropped onto the black display portion using an inkjet method to form a red colored layer 30a having a predetermined thickness.

  Here, the electrophoretic device 2 needs to apply an external voltage when writing a pattern. However, after writing once, even after the external voltage is cut off, the electrophoretic particles are charged by the electrophoretic particles. Since the display has a memory property that it can be held, it can be placed on the production line while supplying power without supplying power, and mass production becomes easy.

  Thereafter, the pattern corresponding to red (R) is erased, the pattern corresponding to green (G) is displayed in the same manner, and a green colorant is dropped onto the displayed area by the ink jet method using this display as an index. As a result, the green colored layer 30b is formed. Similarly, a pattern corresponding to blue (B) is displayed to form a blue colored layer 30c. Thereby, as shown in FIG.1 (c), the color filter which consists of colored layers 30a-30c on the monochrome electrophoretic device 2 is formed.

  Here, as the colorant constituting the colored layer, any colorant may be used as long as it can function as a color filter. Further, the coloring component contained in the colorant may be a pigment or a dye.

  In this embodiment, since the ink is discharged by an ink jet method, it is preferable that the liquid material is suitable for discharge by an ink jet method.

  For example, as a red colorant, for example, 22.5 parts of a red pigment “Ritogenlend GD” manufactured by Toyo Ink Manufacturing Co., Ltd., a red pigment “Lionogen” manufactured by Toyo Ink Manufacturing Co., Ltd. A red ink composition comprising 7.5 parts of Lend R, 25.0 parts of epoxy resin “Epicoat 1009” of Yuka Shell Epoxy Co., Ltd., and 45.0 parts of ethyl carbitol is used.

  Examples of the green colorant include 20.25 parts of a green pigment “Rionol Green 2YS” manufactured by Toyo Ink Manufacturing Co., Ltd. and 7.75 parts of a yellow pigment “Rionogen Yellow 3G” manufactured by Toyo Ink Manufacturing Co., Ltd. A green ink composition comprising 26.0 parts of an epoxy resin “Epicoat 1009” and 46.0 parts of ethyl carbitol manufactured by Yuka Shell Epoxy Co., Ltd. is used.

  In addition, as a blue colorant, 14.4 parts of a green pigment “Rionol Blue ES” manufactured by Toyo Ink Manufacturing Co., Ltd., 3.6 parts of a purple pigment “Lionogen Violet RL” manufactured by Toyo Ink Manufacturing Co., Ltd. A blue ink composition comprising 30.0 parts of an epoxy resin “Epicoat 1009” and 52.0 parts of ethyl carbitol manufactured by Yuka Shell Epoxy Co., Ltd. is used.

  In the present embodiment, the desired color pattern is displayed in black on the display unit of the electrophoretic device 2. However, the present invention is not limited to this, and the pixel electrode 14 and the common electrode 22 of the pixel displaying the desired color are not limited to the above. For example, a pattern of a desired color may be displayed in white by applying a reverse voltage.

  Next, as shown in FIG.1 (d), the protective layer 32 is formed on the colored layers 30a-30c. The protective layer 32 is formed, for example, by bonding a resin film made of polyethylene terephthalate (PET) or the like via a transparent adhesive such as polyvinyl alcohol, acrylic or silicon. For example, the protective layer 32 is formed by applying and curing polyvinyl alcohol, acrylic, silicon, or the like. These are appropriately selected.

  By the way, the formation of the color filter by the ink jet method can be performed by, for example, a manufacturing apparatus 5 (color display manufacturing apparatus) as shown in FIG. The manufacturing apparatus 5 includes an ejection head 40, an imaging unit (imaging unit) 50, a control unit (control unit) 58, and a moving mechanism (moving unit) 52.

  The discharge head 40 includes a tank that stores a colorant (not shown), and is configured to discharge the colorant supplied from the tank to the outside. As shown in FIG. 4B, a reservoir 42 and a pressurizing chamber 43 are formed in the main body 41 of the ejection head 40. The reservoir 42 is a flow path for supplying the colorant 44 to the pressurizing chamber 43. A nozzle plate 45 that constitutes a discharge surface is mounted on the bottom surface of the head body 41, and a nozzle 46 that discharges the colorant 44 to the outside is provided on the nozzle plate 45. The piezo element 47 is obtained by sandwiching a piezoelectric material such as quartz crystal with a pair of electrodes (not shown), and the pair of electrodes is connected to a drive circuit 48.

  Here, when a drive signal is sent from the control unit 58 to the drive circuit 48, a voltage is applied from the drive circuit 48 to the piezo element 47 accordingly, and the piezo element 47 expands or contracts. When the piezo element 47 contracts and deforms, the pressure in the pressurizing chamber 43 decreases and the colorant 44 flows from the reservoir 42 into the pressurizing chamber 43. When the piezo element 47 expands and deforms, the pressure in the pressurizing chamber 43 increases. Thus, the colorant 44 is discharged from the nozzle 46.

  In the present embodiment, the piezoelectric driving method using a piezoelectric element has been described as the ejection head 40. However, the present invention is not limited to this, and either an electrostatic driving method or a thermal ink jet method may be used. Further, in FIG. 4B, the discharge unit is configured by the three discharge heads 40, but the number of the discharge heads 40 is not limited to this, and one to a plurality of discharge heads are used depending on the type of material to be discharged. Can be provided.

  The moving mechanism 52 includes a motor 54 (M1), a motor 56 (M2), and a mechanical structure (not shown). The motor 54 is configured to be able to transport the ejection head 40 in the X-axis direction in cooperation with a mechanical structure (not shown) according to the X-axis drive signal Sx. The motor 56 is configured to be able to transport the ejection head 40 in the Y-axis direction in cooperation with a mechanical structure (not shown) according to the Y-axis drive signal Sy. The moving mechanism 52 changes the relative position of the ejection head 40 with respect to the monochrome electrophoretic device 2. Therefore, in the present embodiment, the moving mechanism 52 is described as configured to be able to move the ejection head 40, but is not limited thereto, and the moving device 52 may be configured to be movable. Alternatively, both may be configured to be movable.

  For the imaging unit 50, for example, an optical observation unit such as a CCD (Charged Coupled Device) camera is used. The optical image captured by the imaging unit 50 is converted into a digital signal by an AD converter (not shown), and the converted digital signal is temporarily stored in the memory of the control unit 58 as optical image data. The control unit 58 transmits drive signals Sx and Sy to the moving mechanism 52 so as to move the ejection head 40 based on the accumulated optical image data.

  The control unit 58 is a computer device, for example, and includes a CPU, a memory, an interface circuit, and the like (not shown). The control unit 58 supplies drive signals Sx and Sy to move the ejection head 40 in accordance with the pattern displayed on the electrophoretic device 2 based on the optical image data obtained from the imaging unit 50, or a colorant. It is configured to be able to supply a drive signal instructing 44 ejection.

  Next, the operation of the manufacturing apparatus 5 will be briefly described. First, the manufacturing apparatus 5 captures an image of the pattern displayed on the display unit of the electrophoresis apparatus 2 by the imaging unit 50, converts the obtained optical image into a digital signal by an AD converter, and sends the digital signal to the control unit 58. Once stored in memory.

  Next, the control unit 58 executes a predetermined program based on the optical image data stored in the memory, thereby determining the movement path of the ejection head 40 and the timing for ejecting the colorant 44.

  Next, the control unit 58 supplies the drive signals Sx and Sy to the moving mechanism 52 so as to move based on the determined moving path, and discharges the colorant 44 at the determined timing. A drive signal is supplied to 40.

According to this embodiment, after forming the electrophoresis device 2, a pattern corresponding to the color pattern is displayed on the electrophoresis device 2, and the colored layer 30 is formed in accordance with the pattern. The production line of the electrophoretic device 2 that has been conventionally used can be used as it is, and the production cost can be reduced.
Further, it is not necessary to adjust the alignment between the substrates as in the case where the color filter and the pixel electrode are formed on separate substrates. Even with a high-definition display, the assembly process is easy and the manufacturing process can be simplified.
Further, in the present embodiment, the electrophoresis apparatus 2 is used as a monochrome display. Although the electrophoretic device 2 needs to apply a voltage from the outside at the time of writing a pattern, after writing once, the display is held by the electric charge stored in each electrode even after the external voltage is cut off (memory) sex). A display device displaying a required pattern can be removed and placed on the production line, facilitating mass production.

  Moreover, in this embodiment, since a color filter is formed using the inkjet method, it is not necessary to perform a complicated process like the case where a photolithography technique is used. Moreover, since a predetermined amount can be supplied to a predetermined location, the colorant 44 is not wasted.

  In the above example, the stripe arrangement type is described as the arrangement of the color filters, but the arrangement is not limited thereto. For example, the delta arrangement type as shown in FIG. 3B or the mosaic arrangement type as shown in FIG.

  In the above example, the electrophoretic device 2 is described as a monochrome display, but the present invention is not limited to this, and an organic EL display device using an organic EL element as a display unit or a liquid crystal using a liquid crystal element as a display unit. A display device, an electrochromic display device using an electrochromic material for a display portion, an electronic powder fluid display device using an electronic powder fluid for a display portion, or the like may be used. In addition, when the electrophoretic device 2, the electrochromic display device, and the electro-powder fluid display device are used, since they have a memory property as described above, they are placed on the production line while being displayed without supplying power. Has the excellent advantage of being able to

  Moreover, the manufacturing method of the electrophoresis apparatus 2 is not limited to the said example, For example, as the 1st board | substrate 10, the flexibility comprised from a polycarbonate resin acrylic resin, a polyimide resin, a polyethylene naphthalate polyether sulfone, etc. In the case of using a substrate, the thin film semiconductor circuit layer 12 is formed by, for example, a thin film element transfer technique introduced in Japanese Patent Laid-Open Nos. 10-125931, 11-26733, 2004-327836, and the like. It can be formed by use.

  In the above example, the microcapsule 16 including the electrophoretic particles 16a is used for the electrophoretic layer 20, but the present invention is not limited to this. For example, a microcapsule as disclosed in Japanese Patent Application Laid-Open No. 2004-4714 is used. Instead of the capsule, a structure in which a partition wall is directly provided on the thin film semiconductor circuit layer 12 and a dispersion liquid containing the electrophoretic particles 16a is directly introduced into the partition wall may be employed.

(Second Embodiment)
In the first embodiment, the colored layer 30 is formed along the pattern displayed on the electrophoretic device 2, but in this embodiment, a bank is first formed along the pattern displayed on the electrophoretic device 2. Thereafter, the colored layer 30 is formed in a region surrounded by the formed bank.

  FIG. 5 is a process diagram for explaining a method of manufacturing a color display according to the second embodiment of the present invention.

  First, the electrophoresis apparatus 2 is prepared by the same method as the process of FIG. 1A of the first embodiment (FIG. 5A). Next, as shown in FIG. 5B, the electrophoretic device 2 displays a pattern corresponding to the color pattern, and a bank (bank) is formed on the display surface 26 of the electrophoretic device 2 by the ink jet method according to the displayed pattern. 34 is formed.

  Specifically, first, the color patterns of all colors are displayed simultaneously, and the outer periphery of the pattern is surrounded along the edge of the displayed pattern (more specifically, corresponding to the pixel electrode 14). A bank 34 is formed in the gap between the display areas. Here, the material constituting the bank 34 is not particularly limited as long as it is a liquid material that can be ejected by an inkjet method and can be cured after ejection. For example, polysilazane, acrylic resin, epoxy resin, polyimide resin, or the like is used.

  The bank 34 can be manufactured by the same method as the method for forming the colored layer 30 by using the manufacturing apparatus 5 described in the first embodiment.

  Next, as shown in FIG. 5C, in a region surrounded by the bank 34, a colored layer 30 of a predetermined color is formed by an ink jet method according to the arrangement of each color constituting the color pattern. In the present embodiment, when forming the colored layer 30, the pattern display of the electrophoretic device 2 is not used, but the pattern for each color is displayed as in the process of FIG. 1B of the first embodiment. According to this, the colored layer 30 may be formed for each color.

  Next, a color display is obtained by forming a protective layer 32 on the formed colored layer 30 by the same method as in the step of FIG. 1D of the first embodiment (FIG. 5D). .

  According to the present embodiment, in addition to the same effects as those of the first embodiment, since the colored layer 30 is formed after the bank 34 is formed, it is possible to prevent color bleeding and obtain a clear image. Color display can be provided.

  In the above example, all the pixels are displayed in advance, the banks 34 are formed in the gaps between the pixel electrodes 14, and then the colored layer 30 is formed. However, the present invention is not limited to this. For example, a pattern is displayed for each color. The formation of the bank 34 and the formation of the colored layer 30 may be repeated.

  For example, first, a red pattern is displayed, a bank 34 is formed along the pattern, and then a red colored layer 30a is formed. Next, after a green pattern is displayed and the bank 34 is formed along the pattern, the green colored layer 30b is formed. Furthermore, after displaying a blue pattern and forming the bank 34 along the said pattern, you may make it form the blue colored layer 30b.

(Third embodiment)
In the first embodiment, the color filter is directly formed on the electrophoretic device 2, but in the third embodiment, the color filter once formed on the electrophoretic device 2a used for manufacturing the color filter is replaced with another color filter. A color display is manufactured by pasting on the electrophoresis apparatus 2.

  FIG. 6 is a process diagram for explaining a method of manufacturing the color filter 3. In the present embodiment, as shown in FIG. 6A, from FIG. 1B described in the first embodiment, except that the color filter 3 is manufactured on a transparent substrate 36 made of glass, resin, or the like. The color filter 3 is manufactured by a process similar to the process of FIG.

  Next, as shown in FIG. 7A, this color filter 3 is different from the electrophoresis apparatus 2a that manufactured the color filter 3, but has the same configuration with the same color pattern as the electrophoresis apparatus 2a. While aligning with the device 2b, bonding is performed via an adhesive layer (not shown). Thereby, a color display is obtained (FIG. 7B). At this time, as the adhesive constituting the adhesive layer, for example, a transparent adhesive such as polyvinyl alcohol, acrylic or silicon is used.

  According to this embodiment, after forming the electrophoretic device 2, a pattern corresponding to the color pattern is displayed on the electrophoretic device 2, and the color filter 3 is formed according to the pattern by the inkjet method. A color filter having a color pattern can be easily manufactured, and a color display is manufactured using such a color filter, so that the manufacturing cost of the color display can be reduced.

  In the present embodiment, similarly to the second embodiment, a bank may be formed in accordance with the pattern displayed on the electrophoretic device 2 and then the colored layer 30 may be formed.

(Fourth embodiment)
The electronic device of the present invention includes the above-described color display as a display unit. Here, the “electronic device” includes all devices including a display unit, and includes a display device, a television device, electronic paper, a clock, a calculator, a mobile phone, a portable information terminal, and the like. Also, things that deviate from the concept of “equipment”, for example, flexible paper / film-like objects, belonging to real estate such as wall surfaces to which these objects are attached, moving objects such as vehicles, flying objects, ships, etc. Including those belonging to.

  FIG. 8 is a perspective view illustrating a specific example of an electronic device using a color display. FIG. 8A is a perspective view illustrating an electronic book which is an example of the electronic apparatus. The electronic book 1000 includes a book-shaped frame 1001, a cover 1002 that is rotatable (openable and closable) with respect to the frame 1001, an operation unit 1003, and a color display according to an embodiment of the present invention. And a configured display unit 1004.

  FIG. 8B is a perspective view illustrating a wrist watch that is an example of an electronic apparatus. The wristwatch 1100 includes a display unit 1101 configured by a color display according to an embodiment of the present invention.

  FIG. 8C is a perspective view illustrating electronic paper which is an example of an electronic apparatus. The electronic paper 1200 includes a main body unit 1201 configured by a rewritable sheet having the same texture and flexibility as paper, and a display unit 1202 configured by a color display according to an embodiment of the present invention. Note that the range of electronic devices to which a color display can be applied is not limited to this, and includes a wide range of devices that utilize changes in visual color tone accompanying the movement of charged particles. For example, in addition to the above-described devices, those belonging to real estate such as wall surfaces to which an electrophoretic film is bonded, and those belonging to moving bodies such as vehicles, flying objects, and ships are also applicable.

FIG. 1 is a process diagram for explaining a color display manufacturing method according to a first embodiment of the present invention. FIG. 2A is a schematic diagram of the electrophoretic device 2, and FIG. 2B is a partially enlarged view of a display unit of the electrophoretic device 2. FIG. 3 is a diagram for explaining a color pattern. 3A shows a stripe arrangement type, FIG. 3B shows a delta arrangement type, and FIG. 3C shows a mosaic arrangement type. FIG. 4A is a schematic diagram for explaining the configuration of the color display manufacturing apparatus used in this embodiment. FIG. 4B is a schematic view for explaining the structure of the ejection head constituting the color display manufacturing apparatus. FIG. 5 is a process diagram for explaining a method of manufacturing a color display according to the second embodiment of the present invention. FIG. 6 is a process diagram for explaining a method of manufacturing the color filter 3. FIG. 7 is a process diagram for explaining the color display manufacturing method according to the third embodiment of the present invention. FIG. 8 is a perspective view illustrating a specific example of an electronic apparatus to which a color display is applied.

Explanation of symbols

2 electrophoretic device, 3 color filter, 5 manufacturing device, 10 first substrate, 12 thin film semiconductor circuit layer, 14 pixel electrode, 16 microcapsule, 16a electrophoretic particle, 16b dispersion medium, 18 binder, 20 electrophoretic layer, 22 common electrode, 24 second substrate, 26 display surface, 30 colored layer, 30a red colored layer, 30b green colored layer, 30c blue colored layer, 32 protective layer, 34 bank, 36 transparent substrate, 40 discharge head , 41 Head body, 42 Reservoir, 43 Pressure chamber, 44 Colorant, 45 Nozzle plate, 46 Nozzle, 47 Piezo element, 48 Drive circuit, 50 Imaging unit, 52 Moving mechanism, 54 Motor M1, 56 Motor M2, 58 Control Part, 201 data line driving circuit, 202 scanning line driving circuit, 203a connection terminal, 1000 electronics Click, 1001 frame, 1002 cover, 1003 operation unit, 1004 display portion, 1009 Epikote 1100 watch, 1101 display portion, 1200 an electronic paper, 1201 main body, 1202 display portion

Claims (11)

Display a pattern corresponding to the color pattern on the monochrome display,
Forming a colored layer of a predetermined color on the display surface of the monochrome display in accordance with the pattern;
A method of manufacturing a color display. Display a pattern corresponding to the color pattern on the monochrome display,
Forming a bank along the edge of the pattern on the display surface of the monochrome display, and forming a colored layer of a predetermined color in a region surrounded by the bank;
A method of manufacturing a color display.   3. The electrophoretic apparatus, wherein the monochrome display is an electrophoretic device including an electrophoretic layer in which a dispersion liquid containing electrophoretic particles is interposed between a first electrode and a second electrode. A method for producing a color display as described in 1. above.   The method for manufacturing a color display according to claim 1, wherein the colored layer is formed by an inkjet method.   The color display manufacturing method according to claim 2, wherein the bank is formed by an ink jet method.   A color characterized by displaying a pattern corresponding to a color pattern on a monochrome display, and forming a colored layer of a predetermined color on the transparent substrate placed on the display surface of the monochrome display according to the pattern A method for manufacturing a filter.   A pattern corresponding to the color pattern is displayed on the monochrome display, and a bank is formed along the edge of the pattern on the transparent substrate placed on the display surface of the monochrome display, and the area is surrounded by the bank. A method for producing a color filter, comprising forming a colored layer of a predetermined color.   8. The electrophoretic device, wherein the monochrome display device includes an electrophoretic layer in which a dispersion liquid containing electrophoretic particles is interposed between a first electrode and a second electrode. The manufacturing method of the color filter as described in any one of.   A method for producing a color display, comprising: joining a color filter produced using the method for producing a color filter according to claim 6 to a display surface of a monochrome display.   An electronic apparatus comprising a color display manufactured by the method for manufacturing a color display according to claim 1. An ejection head capable of ejecting the colorant onto the display surface of the monochrome display;
Moving means configured to be able to change the relative position of the ejection head and the monochrome display;
Imaging means for imaging a pattern according to the color pattern displayed on the monochrome display;
Control means for controlling the moving means to move the ejection head relative to the monochrome display in accordance with the pattern acquired by the imaging means;
An apparatus for producing a color display, comprising:

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