JP2009122262A - Display with power generation function - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a display with a power generation function which does not necessitate exchange of a cell and can be constituted as a thin display. <P>SOLUTION: A display part 32 composed of an information display panel wherein a display medium is encapsulated in a space between two substrates at least one of which is transparent and which displays information such as an image by driving the display medium and a power generation part 33 composed of solar cells formed between the two substrates are formed between the same substrates to constitute the display 31 with the power generation function. The power of the power generation part is used for driving of the display part. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a display with a power generation function including an information display panel using a solar cell as a power source.

  Conventionally, as an information display device replacing a liquid crystal display device (LCD), a charged particle gas moving method (for example, an electronic powder fluid method), a charged particle liquid moving method (electrophoresis method, microcapsule type electrophoresis method), electro Information display devices using techniques such as a chromic method, a cholesteric liquid crystal method, a thermal method, and a two-color particle rotation method have been proposed.

  Compared with conventional LCDs, these technologies have advantages such as a wide viewing angle that is close to that of ordinary printed materials, low power consumption, and memory functions. It is considered as a technology that can be used for an inexpensive information display device, and is expected to expand to information display for mobile terminals, electronic paper, and the like.

  Among these, the charged particle movement method and the cholesteric liquid crystal method are particularly expected to be used for electronic paper because they are excellent in display memory property (bistable property). Among them, the charged particle movement type information display panel has an optical reflectance and chargeability composed of a particle group composed of at least one kind of particles in a space between two substrates, at least one of which is transparent. There is known an information display panel that displays at least one type of display medium and displays information such as images by driving the display medium by applying an electric field to the display medium (for example, see Patent Document 1).

International Publication No. 2005/062112 Pamphlet

  The information display panel that performs display by driving the above-described display medium (liquid crystal, charged particles, etc.) requires electric power for rewriting, so that a battery needs to be mounted on the drive circuit. Such an information display panel has a problem that the battery needs to be replaced because the battery is consumed when used for a long period of time. In addition, even if a thin display portion is made, the thickness of the entire display including the drive circuit and the battery is increased due to the thickness of the battery to be mounted, which makes it difficult to produce a thin display. .

  An object of the present invention is to solve the above-described problems, and to provide a display with a power generation function that can be configured as a thin display without the need for battery replacement.

  The display with a power generation function of the present invention includes a display unit including an information display panel for enclosing a display medium in a space between two substrates, at least one of which is transparent, and driving the display medium to display information such as an image. And a power generation unit composed of a solar cell formed between the two substrates, and formed between the same substrates, and the power of the power generation unit is used for driving the display unit.

  As a suitable example of the display with a power generation function of the present invention, a dye-sensitized solar cell is used as a solar cell constituting the power generation unit, and the information display panel is configured as a particle group including a chargeable particle. An information display panel in which a medium is arranged in a cell space formed between the substrates and display pixels formed by electrode pairs provided on the substrates are arranged in a dot matrix, and the two substrates are configured by flexible substrates, and the display unit In addition, the power generation unit is configured to be flexible, and the power generation unit is equipped with a chargeable / dischargeable secondary battery. The dye-sensitized solar cell is known from, for example, JP-A-2005-228615.

  According to the present invention, a display medium is sealed in a space between two substrates, at least one of which is transparent, and an information display panel that displays information such as an image by driving the display medium, and between the two substrates A display with a power generation function that can be configured as a thin display without the need for battery replacement, by using the power of the solar battery for driving the information display panel. Can be obtained. Furthermore, by using two substrates as flexible substrates, a display with a flexible power generation function as a whole can be obtained.

  First, a charged particle movement type panel will be described as an example of a basic configuration of an information display panel used in a display with a power generation function of the present invention. In this panel, an electric field is applied to a display medium configured as a particle group including charged particles sealed in a space between two opposing substrates. Along with the applied electric field direction, the display medium is attracted by an electric field force or a Coulomb force, and the display medium is moved by a change in the electric field direction, whereby information such as an image is displayed. Therefore, it is necessary to design the display panel so that the display medium can move uniformly and maintain stability when rewriting the display repeatedly or when displaying the display information continuously. Here, as the force applied to the particles constituting the display medium, in addition to the force attracting each other by the Coulomb force between the particles, an electric mirror image force between the electrode and the substrate, an intermolecular force, a liquid cross-linking force, gravity and the like can be considered.

 The configuration of the information display panel used in the present invention will be described with reference to FIGS. 1A, 1B to 4A, 4B and FIGS.

  In the example shown in FIGS. 1A and 1B, at least two or more types of display media that are configured as a particle group including particles having optical reflectivity and chargeability and have different optical reflectivity and charging characteristics are used. (Here, the white display medium 3W composed of particles of the white display medium particles 3Wa and the black display medium 3B composed of particles of the black display medium particles 3Ba are shown.) In the cell, in accordance with an electric field generated by applying a voltage between an electrode pair formed by an electrode 5 (individual electrode) provided on the substrate 1 and an electrode 6 (individual electrode) provided on the substrate 2, the substrate 1 And move vertically to the substrate 2. Then, as shown in FIG. 1A, the white display medium 3W is visually recognized by the observer and white dot display is performed, or as shown in FIG. 1B, the black display medium 3B is visually recognized by the observer. Black dots are displayed. In addition, in FIG. 1 (a), (b), the partition in front is abbreviate | omitted.

  In the example shown in FIGS. 2 (a) and 2 (b), at least two or more types of display media that are configured as a particle group including particles having optical reflectivity and chargeability and have different optical reflectivity and charging characteristics are used. (Here, the white display medium 3W composed of particles of the white display medium particles 3Wa and the black display medium 3B composed of particles of the black display medium particles 3Ba are shown.) In the cell, the substrate 1 corresponds to the electric field generated by applying a voltage between the electrode pair formed by the electrode 5 (line electrode) provided on the substrate 1 and the electrode 6 (line electrode) provided on the substrate 2. And move vertically to the substrate 2. Then, as shown in FIG. 2 (a), the white display medium 3W is visually recognized by the observer and white dot display is performed, or as shown in FIG. 2 (b), the black display medium 3B is visually recognized by the observer. Black dots are displayed. In addition, in FIG. 2 (a), (b), the partition in front is abbreviate | omitted.

  In the example shown in FIGS. 3A and 3B, an example of color display in which a display unit (1 dot) is constituted by three cells is shown. In the example shown in FIGS. 3A and 3B, as the display medium, all the cells 21-1 to 21-3 are filled with the white display medium 3W and the black display medium 3B, and the first cell 21-1 is filled. A red color filter 22R is provided on the viewer side, a green color filter 22G is provided on the viewer side of the second cell 21-2, a blue color filter 22BL is provided on the viewer side of the third cell 21-3, A display unit (one dot) is composed of three cells, the first cell 21-1, the second cell 21-2, and the third cell 21-3. In this example, as shown in FIG. 3A, the white display medium 3 </ b> W is moved in the first cell 21-1 to the third cell 21-3 on the viewer side, thereby Alternatively, white dot display is performed, or as shown in FIG. 3B, the black display medium 3B is moved to the viewer side in all the first cells 21-1 to 21-3. Thus, black dots are displayed to the observer. In addition, in FIG. 3 (a), (b), the partition in front is abbreviate | omitted. Multi-color dot display can be performed by moving the display medium in each cell.

  In the example shown in FIGS. 4A and 4B, one type of display medium configured as a particle group including particles having optical reflectivity and chargeability (here, from the particle group of white display medium particles 3Wa) is used. This is generated by applying a voltage between the electrode pair formed by the electrode 5 and the electrode 6 provided on the substrate 1 in each cell formed by the partition walls 4 and enclosed between the substrates. The substrate 1 and the substrate 2 are moved in a direction parallel to the electric field to be applied. Then, as shown in FIG. 4A, the white display medium 3W is visually recognized by the observer and white dot display is performed, or as shown in FIG. 4B, the color of the black plate 7 is changed to the observer. The black dots are displayed by visually recognizing. In addition, in the example shown to Fig.4 (a), (b), the partition in front is abbreviate | omitted.

  When performing dot matrix display on a display medium type display having no drive threshold, active drive is essential, and the back side needs to be a TFT (Thin Film Transistor) substrate. As an example of this display medium system, the electrophoretic system is illustrated in FIGS. 5 and 6, and the individual electrodes 5 and 6 constitute an electrode pair. In this case, a microcapsule 9 in which a white display medium 3 </ b> W and a black display medium 3 </ b> B are enclosed as the display medium together with the insulating liquid 8 is disposed in the space between the substrates 1 and 2. In this example, an example will be described in which the white display medium 3W is a positively charged particle and the black display medium 3B is a negatively charged particle. First, 0 (Volt) and V (Volt) are alternately applied to the electrode of the substrate 1 and the electrode of the substrate 2 to erase information such as previously displayed images, and the entire display surface is displayed in black. . At this time, V (Volt) is applied to the electrode of the substrate 1, and 0 (Volt) is applied to the TFT pixel electrode. Next, the electrode of the substrate 1 is set to 0 (Volt), and a voltage of 70 (Volt) is applied to a pixel (TFT pixel electrode provided on the substrate 2) to be displayed in white, thereby corresponding to the pixel. Only the display medium can be reversed to display white.

  Conversely, by applying 0 (Volt) and V (Volt) alternately to the electrode of the substrate 1 and the electrode of the substrate 2, information such as previously displayed images is erased, and the entire display surface is displayed in white. deep. At this time, 0 (Volt) is applied to the electrode of the substrate 1, and V (Volt) is applied to the TFT pixel electrode. Next, 70 (Volt) is applied to the electrode of the substrate 1, and 0 (Volt) is applied to the pixel (TFT pixel electrode provided on the substrate 2) to be displayed in black, thereby displaying the display medium corresponding to the pixel. Only the image can be reversed and displayed in black. 5 and 6, the front partition is omitted.

  In the example shown in FIGS. 7A to 7C, a cholesteric liquid crystal in which 20 to 40% of a chiral agent is added to a nematic liquid crystal is sealed in a space between the electrode of the substrate 1 and the electrode of the substrate 2. By applying a voltage, the orientation state of the cholesteric liquid crystal is changed to display information such as an image.

  First, in the planar state shown in FIG. 7A as a reference, light having a wavelength corresponding to the helical pitch of the cholesteric liquid crystal is selectively reflected. In this planar state, a low voltage pulse is applied to the electrode of the substrate 1 and the electrode of the substrate 2 to transition to the focal conic state of FIG. In this focal conic state, light is transmitted, so that the light transmitted by the light absorption layer provided on the surface of the electrode-attached substrate 2 is absorbed, so that black display is obtained. Next, a high voltage pulse is applied to the substrate with electrode 1 and the substrate with electrode 2 to return to the planar state of FIG. 7A through the homeotropic state of FIG. By performing such an operation for each pixel, information such as an image is displayed. The spiral pitch of the cholesteric liquid crystal can be controlled by the type and amount of the chiral agent added, and full color display is possible by selectively reflecting the red, green, and blue light in the vertical direction and three layers in the vertical direction. It is.

In the example shown in FIG. 8, a porous titanium oxide (TiO ₂ ) thin film is formed on the transparent electrode of the substrate with electrode 2, and a Redox dye 24 such as a viologen derivative is applied to the surface 23 of the porous titanium oxide. Adsorbed. A tin oxide thin film 25 doped with Sb is formed on the transparent electrode of one substrate 1 with electrodes, and titanium oxide particles capable of ion permeation are formed in layers on the tin oxide thin film 25. An electrolyte is sealed between these two substrates with electrodes. A current is passed between the two electrodes, and the redox dye 24 is colored in an oxidized state to display a color, and becomes transparent in a reduced state and a decolored state. Therefore, the titanium oxide thin film 26 formed on the substrate 1 with electrodes. Becomes a reflective layer and displays white. In this case, by selecting the Redox dye 24, the wavelength of color development can be changed, and color display is also possible.

As mentioned above, the technique of the present invention is:
(1) At least one type of display medium configured as a particle group containing charged particles having optical reflectivity is sealed between two hollow substrates with electrodes that are transparent at least one, and the display medium is sealed. An in-gas particle movement display panel that displays information such as images by moving the display medium by applying an electric field;
(2) A microcapsule in which a display medium configured as a particle group including two kinds of chargeable particles having different optical reflectivities and polarities is enclosed with an insulating liquid in a space between two electrode-attached substrates at least one of which is transparent An electrophoretic method (particle movement method in liquid) display unit panel that displays information such as an image by moving the display medium by applying an electric field to the display medium;
(3) A cholesteric liquid crystal display panel that displays information such as an image by enclosing cholesteric liquid crystal in a space between two substrates with electrodes, at least one of which is transparent, and controlling a voltage applied between the substrates;
(4) The space between two substrates with electrodes, at least one of which is transparent, is filled with an electrochromic material whose transparency changes between an oxidized state and a reduced state, and an electric current is passed between the electrodes to oxidize by an electrochemical reaction. An electrochromic display panel that displays information such as images by changing the state and reduction state;
(5) Other, bistable (memory), MEMS display panel, silver electrolysis deposition display panel, dissolution-based display panel, and other conventional display memory characteristics The present invention can also be applied to an information display panel using a liquid crystal system without any other.

  The characteristic part of the display with a power generation function of the present invention is that the information display panel substrate having the above-described configuration is shared, solar cells are integrally formed between the substrates, and the power generated by the solar cells is displayed as information. It is to be used for driving a panel.

  9 (a) and 9 (b) are diagrams for explaining the configuration of an example of the display with a power generation function according to the present invention. FIG. 9 (a) is a plan view thereof, and FIG. 9 (b) is FIG. Sectional drawing along the AA line of (a) is shown, respectively. In the example shown in FIGS. 9A and 9B, the display 31 with a power generation function of the present invention includes a display unit 32 composed of an information display panel having the above-described configuration and a power generation unit 33 composed of a dye-sensitized solar cell. Are formed between the same substrates 5 and 6. In the example shown in FIGS. 9A and 9B, 34-1 to 34-3 are TCP (Tape Carrier Package) on which an IC chip for driving the display unit 32 is mounted, and 35-1 to 35-2 are A solar cell electrode 36 constituting the power generation unit 33 is a sealing agent that seals the display unit 32 and the power generation unit 33 separately.

  In the example shown in FIGS. 9A and 9B, the information display panel constituting the display unit 32 is shown here as an example using a charged particle gas movement type, but FIGS. Any of the configurations shown in the above can be used. Here, as the substrates 1 and 2, transparent film substrates such as glass, polyethylene terephthalate (PET), polycarbonate (PC), acrylic, polyethylene naphthalate (PEN), and polyethersulfone (PES) can be used. Further, since the substrate on the back side does not have to be transparent, an opaque resin or a metal plate can be used in addition to the transparent substrate. As the transparent electrode 5, indium tin oxide (ITO), indium zinc oxide (IZO), fluorine-doped tin oxide (FTO), antimony-doped silver oxide (ATO), aluminum-doped zinc oxide (AZO), gallium-doped zinc oxide (GZO) Etc. can be used. Since the back electrode does not have to be transparent, metals represented by element symbols such as Al, Cu, Ag, Ni, Cr, Au, Pt, Pd, Nd, Mo, Ta, and alloys containing them can also be used. Moreover, although the dye-sensitized solar cell was used as a solar cell which comprises the electric power generation part 33, what kind of conventionally well-known type solar cell can be used. In the dye-sensitized solar cell shown in FIGS. 9A and 9B, a catalyst film 41 such as Pt, electrolysis is provided in a space surrounded by the partition walls 4 between the substrates 5 and 6 and the sealant 36 on the outside thereof. A liquid electrode 42, a sensitizing dye 43, and a semiconductor electrode 44 such as titanium oxide are provided.

  FIGS. 10A to 10E are diagrams for explaining the configuration of another example of the display with a power generation function according to the present invention. In the example shown in FIG. 10 (a), the display unit 32 and the power generation unit 33 are divided into upper and lower parts, and in the example shown in FIG. 10 (b), the power generation unit 33 is provided in an L shape outside the display unit 32. In the example shown in FIG. 10 (c), two power generation units 33 are provided on both sides of the display unit 32, and in the example shown in FIG. 10 (d), a U-shape is formed outside the display unit 32. In the example illustrated in FIG. 10E, the power generation unit 33 is provided in a part of the display unit 32.

  As a solar cell used in the case of making a flexible display in which two substrates used in the display with a power generation function of the present invention are flexible, it is preferable to use a dye-sensitized solar cell that can be configured flexibly. Further, the display unit in that case is preferably a system in which a display medium configured as a particle group including a chargeable particle is passively driven. Passive driving is preferable because a rigid TFT element required for active driving is not required. If a flexible TFT such as an organic TFT is used, an active drive type flexible display can be obtained, but it becomes very expensive.

  According to the display 31 with the power generation function of the present invention described above, by integrating the display unit 32 composed of the information display panel and the power generation unit 33 composed of the solar cell, there is no need to replace the battery due to the battery life, It will be able to provide power without maintenance semi-permanently. In addition, by installing a rechargeable secondary battery in the power generation unit 33 made of a solar battery, it is possible to rewrite an image by charging while being exposed to light and discharging from the secondary battery, Rewriting is possible even when the light is weak. Furthermore, by using a dye-sensitized solar cell as the solar cell and sharing it with the substrate of the information display panel, electrode patterning can be performed at the same time, and the display with the power generation function of the present invention can be produced at low cost. it can.

  EXAMPLES Hereinafter, the present invention will be described more specifically with reference to examples of the present invention. However, the present invention is not limited to the following examples.

(About Examples 1 to 3)
First, the display with a power generation function of the present invention was produced as follows. A display with a power generation function integrated with a solar cell was manufactured using a glass substrate having a thickness of 700 μm. A striped ITO electrode is fabricated by etching the indium tin oxide (ITO) film on the display area of the glass substrate coated with an indium tin oxide (ITO) film on the entire surface, and at the same time, uniformly on the solar cell portion. The ITO electrode for solar cells was produced by leaving ITO. Next, platinum for catalyst was laminated only on the solar cell electrode portion by sputtering. Next, a partition wall having a width of 30 μm and a height of 50 μm was formed on the substrate.

  On another glass substrate, the ITO electrode was etched in a stripe shape in the display region, and the electrode was produced by leaving the ITO in the solar cell portion. A paste containing titanium oxide fine particles was applied to the solar cell portion of the substrate by a screen printing method so as to have a thickness of 10 μm, and then baked at 300 ° C. in an oven to produce a titanium oxide semiconductor electrode. Thereafter, the substrate was immersed in an ethanol solution of a sensitizing dye (N3 dye manufactured by Solaronics) for 24 hours, thereby supporting the sensitizing dye on the titanium oxide electrode.

  A group of particles containing chargeable particles as a display medium was sealed in the display portion (display region) of the substrate on which the partition walls were manufactured, and was bonded to another base material on which a titanium oxide semiconductor electrode was manufactured. After that, the display area panel part is completely sealed with a sealant, and the solar cell part is left open in the seal part, and an electrolytic solution containing an iodine redox pair is applied only to the solar cell part. After the injection, the seal was sealed with a sealant.

<Example 1>
For this solar cell-integrated display with a power generation function, the power source was taken from the solar cell, and a drive circuit was fabricated so as to rewrite the display with the power, and a rewriting operation was attempted. In the case of a display with a power generation function integrated with a solar cell so that the solar cell area is 20 cm ² when the area of the display unit is 60 mm × 100 mm, 100 mW corresponding to a general daytime outdoor light amount When light of / cm ² (1 SUN) was irradiated, rewriting was possible only with a solar cell.

<Example 2>
We tried to rewrite the same solar cell-integrated display with power generation function in a room with standard brightness only with the power of the solar cell, but it was not possible. Next, a lithium-ion battery is installed as a secondary battery that can be charged and discharged on this solar cell-integrated display with a power generation function. I tried to do it. As a result, it was possible to rewrite the solar cell integrated display produced this time by charging it for 4 minutes or longer in a room with standard brightness. However, when the charging time is less than 4 minutes, it can be rewritten. There wasn't. Furthermore, it was possible to rewrite twice continuously by charging for 10 minutes or more.

<Example 3>
I tried to rewrite a solar cell integrated display with an area of 60 mm x 100 mm and a solar cell area of 6 cm ² using only the power of the solar cell outdoors and indoors. It was. Next, a lithium ion battery is mounted on this solar cell integrated display as a chargeable / dischargeable secondary battery, the lithium ion battery is charged with the power generated by the solar battery, and the display is driven by the lithium ion battery. . As a result, it is possible to rewrite a display with a power generation function integrated with a solar cell that integrates solar cells with an area of 1/10 of the area of the display unit by charging for 10 minutes or more in a room with standard brightness. However, when the charging time was less than 10 minutes, rewriting could not be performed. Furthermore, it was possible to rewrite twice continuously by charging for 25 minutes or more.

(About Examples 4 to 6)
First, the display with a power generation function of the present invention was produced as follows. Using a polyethylene terephthalate resin film (PET film) substrate having a thickness of 125 μm, a display integrated with a solar cell was produced. A striped electrode is produced by etching ITO on the display part of the PET film substrate coated with the ITO film on the entire surface, and at the same time, the ITO is uniformly left on the solar cell part to form an electrode for a solar cell. . Next, platinum for catalyst was laminated only on the solar cell electrode portion by sputtering. Next, a partition wall having a width of 30 μm and a height of 50 μm was formed on the substrate.

  On another PET film substrate, an ITO electrode was etched in a stripe shape on the display portion, and ITO was left on the solar cell portion to produce an electrode. A paste containing titanium oxide fine particles was applied to the solar cell portion of the substrate by a screen printing method so as to have a thickness of 10 μm, and then baked at 120 ° C. in an oven to produce a titanium oxide semiconductor electrode. Thereafter, the substrate was immersed in an ethanol solution of a sensitizing dye (N3 dye manufactured by Solaronics) for 24 hours, thereby supporting the sensitizing dye on the titanium oxide electrode.

  A group of particles containing chargeable particles as a display medium was sealed in the display portion of the substrate on which the partition walls were formed, and was bonded to another base material on which a titanium oxide semiconductor electrode was manufactured. After that, the display part is completely sealed with a sealing agent, and the sealing part is left open in the solar cell part, and after injecting an electrolyte containing iodine redox pair only into the solar cell part, The seal was sealed with a sealant.

<Example 4>
For this solar cell-integrated display with a power generation function, the power source was taken from the solar cell, and a drive circuit was fabricated so as to rewrite the display with the power, and a rewriting operation was attempted. When the display area (display area) is 60 mm × 100 mm, the solar cell integrated display produced with a solar cell area of 40 cm ² , in the case of a general daytime outdoor light quantity When light of 100 mW / cm ² (1 SUN) corresponding to is irradiated, rewriting was possible only with a solar cell.

<Example 5>
We tried to rewrite the same solar cell-integrated display with power generation function in a room with standard brightness only with the power of the solar cell, but it was not possible. Next, a lithium ion battery is mounted on this solar cell integrated display as a chargeable / dischargeable secondary battery, the lithium ion battery is charged with the power generated by the solar battery, and the display is driven by the lithium ion battery. . As a result, it was possible to rewrite the solar cell integrated display produced this time by charging it for 4 minutes or longer in a room with standard brightness. However, when the charging time is less than 4 minutes, it can be rewritten. There wasn't. Furthermore, it was possible to rewrite twice continuously by charging for 10 minutes or more.

<Example 6>
An attempt was made to rewrite a solar cell integrated display with a display area of 60 mm × 100 mm and a solar cell area of 6 cm ² using only the electric power of the solar cell outdoors and indoors. Next, this solar cell integrated display is equipped with a lithium-ion battery as a secondary battery that can be charged and discharged, and the lithium-ion battery is charged with the power generated by the solar battery, and the display is driven by the lithium-ion battery. . As a result, it is possible to rewrite a display with a power generation function integrated with a solar cell that integrates solar cells with an area of 1/10 of the display area by charging for 20 minutes or more in a room with standard brightness. However, when the charging time was less than 10 minutes, rewriting could not be performed. Furthermore, it was possible to rewrite twice continuously by charging for 60 minutes or more.

  The display with a power generation function of the present invention includes a notebook computer, an electronic notebook, a portable information device called PDA (Personal Digital Assistants), a display unit of a mobile device such as a mobile phone, a handy terminal, an electronic book, an electronic newspaper, an electronic manual (electronic Electronic paper such as instruction manuals), signboards, posters, bulletin boards such as blackboards and whiteboards, electronic desk calculators, display units such as home appliances and automobile supplies, card display units such as point cards and IC cards, electronic advertisements, information Display of various electronic devices such as POS terminals, car navigation devices, watches, etc., as well as boards, electronic POP (Point Of Presence, Point Of Purchase advertising), electronic price tags, electronic shelf labels, electronic musical scores, and display units for RF-ID devices It is suitably used for the part.

(A), (b) is a figure which shows an example of the fundamental structure of the information display panel used with the display with a power generation function of this invention. (A), (b) is a figure which shows the other example of the fundamental structure of the information display panel used with the display with an electric power generation function of this invention. (A), (b) is a figure which shows the further another example of the fundamental structure of the information display panel used with the display with an electric power generation function of this invention. (A), (b) is a figure which shows the further another example of the fundamental structure of the information display panel used with the display with an electric power generation function of this invention. It is a figure which shows the further another example of the fundamental structure of the information display panel used with the display with a power generation function of this invention. It is a figure which shows the further another example of the fundamental structure of the information display panel used with the display with a power generation function of this invention. (A)-(c) is a figure which shows the example which used the cholesteric liquid crystal as an information display panel used with the display with an electric power generation function of this invention, respectively. It is a figure which shows the example which used the Redox pigment | dye as an information display panel used with the display with a power generation function of this invention. (A), (b) is a figure for demonstrating the structure of an example of the display with a power generation function of this invention, respectively. (A)-(e) is a figure for demonstrating the structure of the other example of the display with a power generation function of this invention, respectively.

Explanation of symbols

1, 2 Substrate 3 Display medium (particle group)
3W white display medium
3B Black display medium 3Wa White display particles
3Ba Black display particles
4 Partition 5 and 6 Electrode 7 Black plate 8 Insulating liquid 9 Microcapsule 21-1 to 21-3 Cell 22R Red color filter 22G Green color filter 22B Blue color filter 23 Surface of titanium oxide 24 Redox dye 25 Sb doped oxide Tin thin film 26 Titanium oxide thin film 31 Display with power generation function 32 Display unit 33 Power generation unit 34-1 to 34-3 TCP
35-1 to 35-2 Electrode for Solar Cell 36 Sealant 41 Catalyst Film 42 Electrolyte 43 Sensitizing Dye 44 Semiconductor Electrode

Claims (5)

  A display medium is sealed in a space between two substrates, at least one of which is transparent, and the display medium is formed between an information display panel that displays information such as an image by driving the display medium, and the two substrates. And a power generation unit composed of a solar cell formed between the same substrates, and using the power of the power generation unit for driving the display unit.   The display with a power generation function according to claim 1, wherein a dye-sensitized solar cell is used as a solar cell constituting the power generation unit.   An information display in which the information display panel is arranged in a cell space formed between particles and a display medium configured as a particle group including a chargeable particle, and display pixels formed by electrode pairs provided on the substrate are arranged in a dot matrix. The information display panel according to claim 1, wherein the information display panel is a display panel.   The information display panel according to any one of claims 1 to 3, wherein the two substrates are configured by flexible substrates, and both the display unit and the power generation unit are configured flexibly.   The display with a power generation function according to claim 1, wherein a rechargeable battery is mounted on the power generation unit.

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