JP2014182324A - Electro-optic device, electronic equipment, and method for controlling electro-optic device - Google Patents

Abstract

An electro-optical device, an electronic apparatus, a control method for the electro-optical device, and the like that can easily realize various characteristics that are difficult to realize in the past.
An electro-optical device that uses electrophoretic particles that migrate in a dispersion medium for image display, and is colored in a first color, a second electrode, and a first color. A first electrophoretic particle charged to a second color, and a second electrophoretic particle colored in a second color and charged to the first polarity, the charge amount of the first electrophoretic particle And the amount of charge of the second electrophoretic particles are different from each other, the amount of change in the light response amount by the first electrophoretic particles in a predetermined time, and the second electrophoresis in the predetermined time The color mixing of the first color and the second color is controlled from the amount of change in the light response amount caused by the particles.
[Selection] Figure 4

Description

  The present invention relates to an electro-optical device, an electronic apparatus using the same, a control method for the electro-optical device, and the like.

  Conventionally, an electrophoretic display device is known as an example of this type of electro-optical device. An electrophoretic display device has a configuration in which an electrophoretic element containing colored electrophoretic particles is sandwiched between a pixel electrode and a counter electrode, and a voltage is applied between both electrodes to migrate the electrophoretic particles. Display an image. At this time, in the electrophoretic display device, for example, when electrophoretic particles colored in different colors are migrated by independently controlling each color, the color of the displayed image can be changed. The electrophoretic element is constituted by, for example, microcapsules each including a plurality of electrophoretic particles, and is enclosed between the pixel electrode and the counter electrode.

  For example, Patent Literature 1 to Patent Literature 3, Non-Patent Literature 1, and Non-Patent Literature 2 disclose techniques relating to such an electrophoretic display device.

  In Patent Document 1, the electrophoretic particles dispersed in the black colored dispersion medium in the microcapsule have different electrophoretic mobilities for each color, and due to the difference in applied voltage value or applied time of applied voltage, A display device that displays different colors is disclosed.

  Patent Document 2 discloses an electrophoretic display device that performs color image display by using red, green, blue, and white color filters.

  Patent Document 3 discloses an electrophoretic display device that includes a plurality of electrophoretic particles each having a different electrophoretic mobility in a fluid, and displays an image according to the optical characteristics of each electrophoretic particle.

  Non-Patent Document 1 discloses an electrophoretic display device that displays a color image by a configuration in which electrochromic layers are stacked for each color.

  Non-Patent Document 2 discloses an electrophoretic display device that displays a color image by independently controlling colored electrophoretic particles having different threshold values.

JP 2000-194021 A US Patent Application Publication No. 2011/0310461 US Patent Application Publication No. 2006/0202949

T. Yashiro, “Novel Design for Color Electrophoretic Display”, SID2011 5.3 N.Hiji, “Novel Color Electrophoretic E-Paper Using Independently Movable Colored Particles”, SID2012 8.4

  As can be seen from Patent Documents 1 to 3 and Non-Patent Documents 1 and 2, the characteristics of the electrophoretic particles and the characteristics of the liquid in which the electrophoretic particles are dispersed determine how to control the electrophoretic display device. It is an important element. In an electrophoretic display device, it is important to aim for further improvement in performance, such as higher contrast and expansion of the operating temperature range, longer display state retention time, and shorter display state update time.

  The present invention has been made in view of the above technical problems. According to some aspects of the present invention, it is possible to provide an electro-optical device, an electronic apparatus, and the like that can easily realize various characteristics that have been difficult to realize in the past.

[Application Example 1]
The electro-optical device according to this application example is an electro-optical device that uses electrophoretic particles that migrate in a dispersion medium for image display, and is colored in a first electrode, a second electrode, and a first color. First electrophoretic particles charged to a first polarity, and second electrophoretic particles colored to a second color and charged to the first polarity, the first electrophoretic particles The charged amount of the electrophoretic particles is different from the charged amount of the second electrophoretic particles, and a predetermined voltage is applied between the first electrode and the second electrode for a predetermined time. In addition, the first color is calculated from the amount of change in the light response amount due to the first electrophoretic particles during the predetermined time and the amount of change in the light response amount due to the second electrophoretic particles during the predetermined time. And a color mixture of the second color is controlled.

  According to this configuration, in the electro-optical device that uses the electrophoretic particles that migrate in the dispersion medium for image display, the first electrode, the second electrode, and the first color are colored, and the first polarity A first electrophoretic particle charged to a second color, and a second electrophoretic particle colored in a second color and charged to a first polarity, and the charge amount of the first electrophoretic particle and the first electrophoretic particle 2 is different from the charge amount of the electrophoretic particles, and the amount of change in the photoresponse amount by the first electrophoretic particles in a predetermined time and the photoresponse amount by the second electrophoretic particles in the predetermined time By controlling the color mixture of the first color and the second color from the amount of change, the color mixture of the first color and the second color in the electro-optical device can be easily displayed.

[Application Example 2]
In the electro-optical device according to the application example, the electro-optical device further includes third electrophoretic particles colored in a third color and charged to the first polarity, and the charge amount of the third electrophoretic particles is: A charge amount different from a charge amount of the first electrophoretic particles and a charge amount of the second electrophoretic particles, and a change amount of a light response amount by the first electrophoretic particles in the predetermined time; From the amount of change in the light response amount due to the second electrophoretic particles in the predetermined time and the amount of change in the light response amount due to the third electrophoretic particles in the predetermined time, the first color, It is preferable to control the color mixture of the second color and the third color.

  According to this configuration, the electrophoretic particle further includes the third electrophoretic particle colored in the third color and charged to the first polarity, and the charge amount of the third electrophoretic particle is the first electrophoretic particle. The charge amount is different from the charge amount of the second electrophoretic particle and the change amount of the photoresponse amount by the first electrophoretic particle in a predetermined time and the second electrophoretic particle in the predetermined time Controlling the color mixture of the first color, the second color, and the third color from the change amount of the light response amount due to the light and the change amount of the light response amount due to the third electrophoretic particles in a predetermined time. Thus, it is possible to easily display a mixed color using the first color, the second color, and the third color in the electro-optical device.

[Application Example 3]
In the electro-optical device according to the application example, it is preferable that the dispersion medium is colored in a fourth color.

  According to this configuration, since the dispersion medium is colored in the fourth color, the mixed color display by the first color, the second color, the third color, and the fourth color in the electro-optical device is displayed. Can be easily performed.

[Application Example 4]
In the electro-optical device according to the application example, the first color is cyan, the second color is magenta, the third color is yellow, and the dispersion medium is colored white. It is preferable.

  According to this configuration, the first color is cyan, the second color is magenta, the third color is yellow, and the dispersion medium is colored white. , Magenta and yellow can be displayed in three primary colors.

[Application Example 5]
An electronic apparatus according to the present invention preferably includes the above electro-optical device.

  According to this configuration, since the electronic apparatus includes the above-described electro-optical device, it is possible to configure an electronic apparatus that facilitates control of color mixing of a plurality of colors in image display.

[Application Example 6]
The control method of the electro-optical device according to this application example includes the first electrophoretic particles colored in the first color and charged in the first polarity, and colored in the second color. A second electrophoretic particle charged to the first polarity with a charge amount different from that of the electrophoretic particle, and a change amount of a light response amount by the first electrophoretic particle in a predetermined time, The color mixing of the first color and the second color is controlled from the amount of change in the light response amount due to the second electrophoretic particles over time.

  According to this method, the first electrophoretic particles colored in the first color and charged to the first polarity, and the first electrophoretic particles colored in the second color and charged differently from the first electrophoretic particles. A second electrophoretic particle charged to a polarity of 1, a change amount of a light response amount by the first electrophoretic particle in a predetermined time, and a light by the second electrophoretic particle in the predetermined time By controlling the color mixture of the first color and the second color from the change amount of the response amount, it is possible to easily display the color mixture of the first color and the second color in the electro-optical device. .

[Application Example 7]
In the control method of the electro-optical device according to the application example, the first polarity is further charged with a charge amount different from that of the first electrophoretic particles and the second electrophoretic particles. The amount of change in the photoresponse amount due to the first electrophoretic particle during the predetermined time and the amount of photoresponse due to the second electrophoretic particle during the predetermined time are used. Controlling the color mixture of the first color, the second color, and the third color from the amount of change and the amount of change in the light response amount by the third electrophoretic particles in the predetermined time. Is preferred.

  According to this method, the third electrophoretic particles colored in the third color and charged to the first polarity with a different charge amount from the first electrophoretic particles and the second electrophoretic particles are obtained. Used, the amount of change in the light response amount by the first electrophoretic particles at a predetermined time, the amount of change in the light response amount by the second electrophoretic particles at the predetermined time, and the third electricity at the predetermined time. By controlling the color mixture of the first color, the second color, and the third color from the amount of change in the light response amount due to the migrating particles, the first color, the second color, and the second color in the electro-optical device are controlled. It is possible to easily display a mixed color with the three colors.

1 is a block diagram of a configuration example of an electrophoretic display device as an electro-optical device. The figure which shows an example of the equivalent circuit in a display area. Explanatory drawing of the principle of operation of an electrophoretic display device. FIG. 3 is a diagram schematically illustrating an outline of a configuration of a microcapsule in the first embodiment. FIG. 3 is an explanatory diagram of electrophoretic mobility of electrophoretic particles in Example 1. The image figure which shows the relationship between the movement distance of electrophoretic particle, and time. The figure which shows typically the outline | summary of a structure of the microcapsule in Example 2. FIG. FIG. 6 is an explanatory diagram of electrophoretic mobility of electrophoretic particles in Example 2. 1 is a schematic block diagram of an electronic apparatus using an electro-optical device.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The embodiments described below do not unduly limit the contents of the present invention described in the claims. In addition, all of the configurations described below are not necessarily indispensable configuration requirements for solving the problems of the present invention. The drawings used for explanation are for convenience of explanation of the embodiments.

  In the following embodiments, an active matrix driving type electrophoretic display device will be described as an example of the electro-optical device according to the present invention. The electro-optical device according to the present invention is an active matrix driving type electrophoretic display. It is not limited to a device.

(First embodiment)
FIG. 1 is a schematic block diagram of an electrophoretic display device 10 as an electro-optical device according to the present embodiment.

  The electrophoretic display device 10 includes a display element having a memory property in each pixel, and has a property of maintaining a previous display state in a state where the display state is not updated.

  The electrophoretic display device 10 includes a display area 12, a controller 20, a scanning line driving circuit 30, a data line driving circuit 40, and a common electrode driving circuit 50.

  The display area 12 includes a plurality of pixels P11 to Pn1, P12 to Pn2,..., P1m, which are arranged in a matrix in m (m is an integer of 2 or more) rows × n (n is an integer of 2 or more) columns. Pnm. Each of the plurality of pixels P11 to Pn1, P12 to Pn2,..., P1m to Pnm has the same configuration. In the display area 12, the scanning lines Y1 to Ym and the data lines X1 to Xn are arranged so as to intersect each other. Specifically, m scanning lines Y1 to Ym extending in the X direction and arranged in the Y direction are provided in the display area 12, and n data lines X1 to Xn extending in the Y direction and arranged in the X direction are provided. Provided. Each pixel is arranged corresponding to the intersection of each scanning line and each data line. Each pixel has a pixel electrode and a counter electrode, and the structure thereof will be described later.

  The controller 20 is a part that controls operations of the scanning line driving circuit 30, the data line driving circuit 40, and the common electrode driving circuit 50. The controller 20 supplies timing signals such as a clock signal and a start pulse signal to the scanning line driving circuit 30, the data line driving circuit 40, and the common electrode driving circuit 50 in order to realize a desired display state.

  The scanning line driving circuit 30 sequentially supplies a scanning signal that is a pulsed signal to each of the scanning lines Y1, Y2,..., Ym within a predetermined frame period under the control of the controller 20.

  The data line driving circuit 40 supplies a data voltage to each of the data lines X1, X2,..., Xn under the control of the controller 20. The data voltage is, for example, one of a reference voltage “GND” (for example, 0 volts), a high potential side voltage “VSH” (for example, +15 volts), and a low potential side voltage “−VSH” (for example, −15 volts). .

  The common electrode driving circuit 50 supplies a common voltage Vcom (for example, a voltage having the same potential as the reference voltage “GND”) to the common electrode line 52 electrically connected to the counter electrode of each pixel. The common voltage Vcom is different from the reference voltage “GND” as long as the voltage between the counter electrode and the pixel electrode when the reference voltage “GND” is supplied is substantially the same. Also good. For example, the common voltage Vcom may have a value different from the reference voltage “GND” supplied to the pixel electrode in consideration of potential fluctuation of the pixel electrode due to AC coupling with other signal lines, electrodes, and the like.

  FIG. 2 shows an example of an equivalent circuit having an electrical configuration in the display region 12. In FIG. 2, the same parts as those in FIG. Since each pixel constituting the pixels P11 to Pn1, P12 to Pn2,..., P1m to Pnm in FIG. 1 has the same configuration, the pixel P11 will be described below.

  The pixel P11 includes a switching transistor 60, a pixel electrode 62, a counter electrode 64, an electrophoretic element (electro-optical element) 66, and a storage capacitor 68.

  The switching transistor 60 is configured by, for example, an N-type metal oxide semiconductor (MOS) transistor. In the switching transistor 60, the gate is electrically connected to the scanning line Y 1, the source is electrically connected to the data line X 1, and the drain is electrically connected to one end of the pixel electrode 62 and the storage capacitor 68. The switching transistor 60 outputs a data voltage supplied via the data line X1 to one end of the pixel electrode 62 and the storage capacitor 68 at a timing corresponding to the scanning signal supplied via the scanning line Y1.

  The pixel electrode 62 is disposed as a first electrode so as to face the counter electrode 64 through the electrophoretic element 66. A data voltage is supplied to the pixel electrode 62 through the data line X 1 and the switching transistor 60.

  The counter electrode 64 is electrically connected as a second electrode to the common electrode line 52 to which the common voltage Vcom is supplied. The counter electrodes 64 included in the pixels constituting the pixels P11 to Pn1, P12 to Pn2,..., P1m to Pnm have the same potential. The counter electrode 64 is made of a transparent conductive material such as magnesium silver (MgAg), indium / tin oxide film (ITO), indium / zinc oxide (IZO), and an image is displayed on the counter electrode 64 side.

  The electrophoretic element 66 is provided between the pixel electrode 62 and the counter electrode 64 to form an electrophoretic layer. The electrophoretic element 66 includes a plurality of microcapsules (cells in a broad sense) each including a plurality of charged and colored electrophoretic particles. That is, the electrophoretic display device 10 is a microcapsule type electrophoretic display device.

  The storage capacitor 68 has a configuration provided with a pair of electrodes arranged to face each other with a dielectric film interposed therebetween. One electrode is electrically connected to the drain of the switching transistor 60 and the pixel electrode 62, and the other electrode is electrically connected to the common electrode line 52. Such a storage capacitor 68 can hold the data voltage supplied to the pixel electrode 62 for a predetermined period.

  Next, an example of the operation of the electrophoretic element 66 will be briefly described assuming two types of electrophoretic particles having different charged charges.

  3A and 3B are diagrams for explaining the operation of the electrophoretic element 66. FIG. 3A and 3B schematically show partial cross-sectional views of the counter electrode 64, the pixel electrode 62, and the electrophoretic element 66 constituting the pixel, and FIG. FIG. 3B shows a state in which the counter electrode 64 is set at a higher potential than the pixel electrode 62, and FIG. 3B shows a state in which the counter electrode 64 is set at a lower potential than the pixel electrode 62. 3A and 3B, the same parts as those in FIG. 2 are denoted by the same reference numerals, and description thereof will be omitted as appropriate.

  Each microcapsule 70 constituting the electrophoretic element 66 includes, for example, a viscous dispersion medium 72, electrophoretic particles 74 that are positively charged and colored black, and electrophoresis that is negatively charged and colored white, for example. Particles 76. The electrophoretic particles 74 and 76 are sandwiched between the pixel electrode 62 and the counter electrode 64, and migrate in the dispersion medium 72 in accordance with the voltage between both electrodes.

  When the counter electrode 64 is set to have a higher potential than the pixel electrode 62, the positively charged black electrophoretic particles 74 are attracted to the pixel electrode 62 as shown in FIG. The charged white electrophoretic particles 76 are attracted to the counter electrode 64. At this time, white is recognized when viewed from the counter electrode 64 side.

  On the other hand, when the counter electrode 64 is set to have a lower potential than the pixel electrode 62, positively charged black electrophoretic particles 74 are applied to the counter electrode 64 as shown in FIG. The white electrophoretic particles 76 that are attracted and negatively charged are attracted to the pixel electrode 62. At this time, black is recognized when viewed from the counter electrode 64 side.

  Further, when the counter electrode 64 is set to have substantially the same potential as the pixel electrode 62, the electrophoretic particles 74 and 76 in the microcapsule 70 are not electrophoresed and the previous display state is maintained. Become.

  In this embodiment, the first electrophoretic particles 761 colored in the first color and charged to the positive charge amount Q1 and the second electrophoretic particles 761 colored in the second color and charged to the positive charge amount Q2 are used. This is an example using migrating particles 741. The first color and the second color are not particularly limited, but the image viewed from the display surface of the electrophoretic display device 10 includes the first color, the second color, the first color, and the second color. It is an image expressed by color mixing with colors. In the present embodiment, the first color is blue and the second color is black. Therefore, in the case of the present embodiment, the image is expressed by gradations represented by blue, black, and a mixed color of blue and black. The relationship between the charge amount of the first electrophoretic particles 761 and the charge amount of the second electrophoretic particles 741 is such that Q1> Q2. Note that the dispersion medium 72 is colored white.

  In FIG. 4, the structure of the microcapsule 170 in a present Example is shown typically. The microcapsule 170 includes first electrophoretic particles 761 and second electrophoretic particles 741 in a white dispersion medium 72.

Here, the relationship between the charge amount (charge amount) of the electrophoretic particles and the electrophoretic mobility (mobility in a broad sense), which is the moving speed per unit time of the electrophoretic particles, is shown. Assuming that the viscosity of the dispersion medium 72 in the microcapsule 170 is η, the particle diameter of the electrophoretic particles is dp, the charge amount charged by the electrophoretic particles is q, and the electric field applied to the electrophoretic element 66 is E, the mobility μ Can be expressed as:

  Since Q1> Q2, the mobility μ is larger in the first electrophoretic particle 761 than in the second electrophoretic particle 741. The mobility μ1 of the first electrophoretic particles 761 and the mobility μ2 of the second electrophoretic particles 741 are schematically shown in FIG. In FIG. 5, the horizontal axis represents the charge amount of the electrophoretic particles in an arbitrary unit, and the vertical axis represents the electrophoretic mobility of the electrophoretic particles in an arbitrary unit.

  As can be seen from the equation (1), the mobility μ of the electrophoretic particles can be varied by varying the charge amount q of the electrophoretic particles. Specifically, as shown in the formula (1), the mobility of the electrophoretic particles can be increased as the charge amount increases. Since Q1> Q2, the electrophoretic mobility μ1 of the first electrophoretic particle 761 is larger than the electrophoretic mobility μ2 of the second electrophoretic particle 741.

  That is, when an electric field having the same intensity that can be migrated is applied to the first electrophoretic particle 761 and the second electrophoretic particle 741, the electrophoretic distance at a predetermined time is equal to that of the first electrophoretic particle 761. Becomes longer than the second electrophoretic particles 741.

  As a result, by utilizing the difference in electrophoretic mobility of electrophoretic particles of the same color, it is possible to realize optical characteristics different from those realized by electrophoretic particles having a single electrophoretic mobility. become.

  FIG. 6 shows the relationship between the migration distance S and time when both the first electrophoretic particles 761 and the second electrophoretic particles 741 migrate from the state on the pixel electrode 62 side of the microcapsule 70 to the counter electrode 64 side. Is shown as a graph. In FIG. 6, the vertical axis represents the migration distance, the horizontal axis represents the passage of time, the migration distance of the first electrophoretic particles 761 is denoted by S1, and the migration distance of the second electrophoretic particles 741 is denoted by S2. On the display surface of the electrophoretic display device 10, the light response amount determined by the position of the first electrophoretic particle 761, the light response amount determined by the position of the second electrophoretic particle 741, and the first electrophoretic particle 761. And the color mixture due to the light response amount of the dispersion medium 72 determined by the position of the second electrophoretic particle 741 is displayed.

  At time t0, both the first electrophoretic particles 761 and the second electrophoretic particles 741 are on the pixel electrode 62 side, and the display surface of the electrophoretic display device 10 corresponds to the photoresponse rate of the dispersion medium 72. White is displayed.

  At time t1, a positive voltage capable of generating an electric field (+ EV) sufficient for the migration of the first electrophoretic particles 761 and the second electrophoretic particles 741 is applied to the pixel electrode 62. The potential of the counter electrode 64 is at the GND level. Thereby, both the first electrophoretic particles 761 and the second electrophoretic particles 741 migrate toward the counter electrode 64. Thereafter, the electrophoresis continues while the electric field continues to exist between the pixel electrode 62 and the counter electrode 64, and the first electrophoretic particle 761 reaches the counter electrode 64 side at time t2, and the second electric current is reached at time t3. The migrating particles 741 reach the counter electrode 64 side.

  Accordingly, during the period from time t1 to time t3, the display surface of the electrophoretic display device 10 has a light response amount of the first electrophoretic particles 761, a response amount of the second electrophoretic particles 741, and a dispersion. The state of color mixing depending on the response amount of the medium 72 continues to change. For this reason, it is possible to display images of different colors by applying an electric field of + EV only during an arbitrary predetermined time within the time interval T1 from time t3 to time t1. The correspondence between the image data to be displayed and the color mixture state can be controlled by preparing a look-up table that defines the correspondence with the time for applying the charge in advance.

  In the above embodiment, the first color is blue and the second color is black. However, if the first color is black and the second color is blue, the color mixture is different from the above case. A state appears. Further, the above description is for the case of migrating from the pixel electrode 62 side to the counter electrode 64 side. First, the first electrophoretic particles 761 and the second electrophoretic particles 741 are moved to the counter electrode 64 side. In this case, it is possible to cause migration to the pixel electrode side by applying a reverse electric field (-EV) having the same intensity as that of the electric field + EV. In this case, a mixed color state different from the above mixed color state appears. Therefore, by controlling the direction of electrophoresis of the electrophoretic particles and the time for migration, it is possible to display an image according to the purpose such as the usage environment and display contents of the electrophoretic display device 10. Further, another color mixture state can be obtained by making the dispersion medium 72 a color different from white.

  The present embodiment is an example in which the third electrophoretic particles 762 that are colored in the third color and charged with the same charge Q3 and different charge Q3 as the charge Q1 and the charge Q2 are further added to the first embodiment. A microcapsule 270 in the present embodiment is shown in FIG. Here, it is assumed that the third electrophoretic particle 762 can be electrophoresed by applying an electric field of + EV and −EV.

  Assuming that Q2 <Q3 <Q1, FIG. 8 is a graph showing an image of the relationship between the migration distance and time of the three types of electrophoretic particles in this example. The migration distance of the third electrophoretic particle 762 is indicated by S3. Expressing different color mixing states depending on the first color, the second color, the third color, and the color of the dispersion medium 72 by applying an electric field for an arbitrary time within a time interval T2 from time t4 to time t5. Can do. When the first color is blue, the second color is black, and the third color is red, a mixed color state of blue, black, red and white depending on the position determined by the mobility of the three types of electrophoretic particles is obtained. Can do.

  As in Example 1, different color mixing states can be created by changing the color or charge of each electrophoretic particle or changing the direction of electrophoresis.

  The present embodiment is an example in which the first color is cyan, the second color is magenta, and the third color is yellow in the second embodiment. Note that the color of the dispersion medium 72 is white. By coloring the three types of electrophoretic particles in this way, it is possible to obtain various colors as a color mixture by applying an electric field for an arbitrary time within the time interval T2 shown in FIG.

  Also in the present embodiment, different color mixing states can be generated by controlling the direction of migration. Also, different color mixing states can be generated by changing the charge amount of each color. Control of how long the electric field of + EV or −EV is applied can be easily performed by creating a lookup table corresponding to the target color in advance.

(Second Embodiment)
The present embodiment is an example in which the electro-optical device according to the first embodiment is applied to an electronic apparatus.

  FIG. 9 is a block diagram illustrating a configuration example of an electronic apparatus 300 including the electro-optical device according to the first embodiment. The electronic device 300 includes a host 310, the electrophoretic display device 10, a storage unit 320, an operation unit 330, and a communication unit 640.

  The host 310 controls the operation of each unit constituting the electronic device 300 including the electrophoretic display device 10. Specifically, the host 310 controls the operation of the electrophoretic display device 10 by executing a program stored in advance in the storage unit 320 or the like. The storage unit 320 stores programs and data executed by the host 310 and image data corresponding to images displayed on the electrophoretic display device 10. Such a function of the storage unit 320 is realized by a read-only memory (ROM), a random access memory (RAM), or the like. The operation unit 330 is used by the user to input various information, and is realized by various buttons, a keyboard, and the like. The communication unit 340 performs communication processing with the outside, for example, receives image data corresponding to an image to be displayed on the electrophoretic display device 10.

  Examples of such an electronic device 300 include various kinds of electronic cards (credit cards, point cards, etc.), electronic papers, electronic notebooks, electronic dictionaries, remote controllers, watches, mobile phones, electronic book terminals, and other portable information terminals, calculators, and the like. Can be mentioned.

  As described above, the electro-optical device, the electronic apparatus, and the like according to the present invention have been described based on any one of the above embodiments, but the present invention is not limited to any one of the above embodiments. For example, the present invention can be implemented in various modes without departing from the gist thereof, and the following modifications are possible.

  The present invention is not limited to the color in which the electrophoretic particles described in the above embodiments are colored, the polarity to be charged, the number of types of electrophoretic particles in the microcapsules, and the like. Further, the present invention is not limited to the materials of the electrode, the dispersion medium, and the electrophoretic particles described in the above embodiment.

  In the above embodiment, the example in which the electrophoretic particles having different electrophoretic mobility are controlled independently according to the voltage application time between the pixel electrode and the counter electrode has been described. However, according to the applied voltage level, the electrophoresis is performed. The electrophoretic particles having different mobilities may be controlled independently.

  In the above embodiments, the present invention has been described as an electro-optical device, an electronic apparatus, a control method for the electro-optical device, and the like, but the present invention is not limited to this. For example, the present invention may be an electrophoretic display device, an electro-optical device, or an electrophoretic display device driving method.

  DESCRIPTION OF SYMBOLS 10 ... Electrophoretic display device, 12 ... Display area, 20 ... Controller, 30 ... Scanning line drive circuit, 40 ... Data line drive circuit, 50 ... Common electrode drive circuit, 52 ... Common electrode line, 60 ... Switching transistor, 60 ... X1 and switching transistor, 62 ... pixel electrode, 64 ... counter electrode, 66 ... electrophoretic element, 68 ... holding capacity, 70 ... microcapsule, 72 ... dispersion medium, 74 ... electrophoretic particle, 76 ... electrophoretic particle, 170 ... Microcapsule, 270 ... microcapsule, 300 ... electronic device, 310 ... host, 320 ... storage unit, 330 ... operation unit, 340 ... communication unit, 640 ... communication unit, 741 ... second electrophoretic particle, 761 ... first Electrophoretic particles of 762, third electrophoretic particles.

Claims (7)

An electro-optical device that uses electrophoretic particles that migrate in a dispersion medium for image display,
A first electrode;
A second electrode;
First electrophoretic particles colored in a first color and charged to a first polarity;
A second electrophoretic particle colored in a second color and charged to the first polarity,
The charge amount of the first electrophoretic particles is different from the charge amount of the second electrophoretic particles,
When a predetermined voltage is applied between the first electrode and the second electrode for a predetermined time, the amount of change in the light response amount due to the first electrophoretic particles during the predetermined time, and the predetermined An electro-optical device that controls the color mixture of the first color and the second color based on the amount of change in the light response amount due to the second electrophoretic particles during the period of time. And further comprising third electrophoretic particles colored in a third color and charged to the first polarity,
The charge amount of the third electrophoretic particles is different from the charge amount of the first electrophoretic particles and the charge amount of the second electrophoretic particles,
The amount of change in optical response due to the first electrophoretic particles during the predetermined time, the amount of change in optical response due to the second electrophoretic particles during the predetermined time, and the third amount during the predetermined time. 2. The electro-optic according to claim 1, wherein a color mixture of the first color, the second color, and the third color is controlled from a change amount of a light response amount due to the electrophoretic particles. apparatus.   The electro-optical device according to claim 1, wherein the dispersion medium is colored in a fourth color.   4. The first color is cyan, the second color is magenta, the third color is yellow, and the dispersion medium is colored white. Electro-optic device. An electronic apparatus having an electro-optical device,
An electronic apparatus comprising the electro-optical device according to claim 1. First electrophoretic particles colored in a first color and charged to a first polarity;
A second electrophoretic particle colored in a second color and charged to the first polarity with a charge amount different from that of the first electrophoretic particle;
From the amount of change in the light response amount due to the first electrophoretic particles in a predetermined time and the amount of change in the light response amount due to the second electrophoretic particles in the predetermined time, the first color and the first A control method for an electro-optical device, wherein color mixing with two colors is controlled. Furthermore, using a third electrophoretic particle colored in a third color and charged to the first polarity with a charge amount different from that of the first electrophoretic particle and the second electrophoretic particle,
The amount of change in optical response due to the first electrophoretic particles during the predetermined time, the amount of change in optical response due to the second electrophoretic particles during the predetermined time, and the third amount during the predetermined time. 7. The electro-optic according to claim 6, wherein a color mixture of the first color, the second color, and the third color is controlled from a change amount of a light response amount due to the electrophoretic particles. Control method of the device.

Images