TWI460695B - Electronic device - Google Patents

Description

Electronic device

The present invention relates to an electronic device, and more particularly to an electronic device such as an electronic book or a flexible flat panel display having a charge and a two-dimensional sheet structure.

Because traditional physical books or magazines have a certain volume and weight, they often affect the convenience of carrying, and the printing of books or magazines also requires the use of a large amount of paper and pigments, which also causes environmental impact and injury, which in turn leads to Information exchange is not easy to wait for.

In order to respond to this trend and cooperate with the era of Internet popularization, the portability of e-books can solve the shortcomings of traditional books. Therefore, when the user wants to read the related e-book content, the information and content that he wants to read can be obtained by simply accessing the physical memory device or the network. In addition, the e-book can be used as a medium for information release. This approach increases the flow of information is a convenient way.

However, in an electronic device such as a conventional black-and-white electronic book or a flexible display, the pigment used is mostly filled with three-dimensional particles, and since the surface charge and quality of the three-dimensionally filled particles are relatively low, in an electronic book or The display speed of an electronic device such as a flexible display is slow, and it also causes disadvantages such as residual image and high power consumption, and limits its applicability.

Therefore, the present invention proposes an electronic device such as an electronic book or a flexible flat panel display having a charge and a two-dimensional sheet structure for use as a display pigment to solve the above problems.

The main object of the present invention is to provide an electronic device capable of enabling an image display such as an electronic book or a flexible flat panel display to be fast and clear, and to increase its legibility and wide application.

To achieve the foregoing objective, the present invention provides an electronic device comprising: a substrate; a lower electrode formed on the substrate; an upper electrode; a transparent plate formed on the upper electrode; and an oil droplet filled in the Between the lower electrode and the upper electrode; wherein the oil droplets are filled with a plurality of nano particles suspended therein, and the nano particles are composed of a two-dimensional sheet structure.

According to the electronic device of the present invention, the upper electrode can be a transparent electrode so that the light can be directly injected into the oil droplet, and the light can be emitted from the upper electrode and the transparent plate after being reflected by the suspended particles in the oil droplet. The user gets the reflected light. A preferred transparent electrode can be used as indium tin oxide or the like.

According to the electronic device of the present invention, the nanoparticles may be black graphite and white graphite having a particle diameter of about 0.1 μm to 100 μm. More specifically, the black graphite may be graphene, and the white graphite may be hexagonal boron nitride (hBN). Furthermore, in order to make the black graphite and the white graphite react rapidly in the oil droplets, the black graphite and the white graphite may be respectively doped with one atom, and the number of doped atoms is not limited as long as the black graphite and the white graphite can be obtained. The amount of charge to be charged may be preferably 1/1000 or less of the total number of atoms of the black graphite and the white graphite.

In a preferred embodiment of the invention, the black graphite may be doped with boron atoms to positively charge and the white graphite is doped with carbon atoms to be negatively charged. It can be seen that when the upper electrode is positively charged and the lower electrode is negatively charged, the white graphite suspended in the oil droplets is adsorbed to the upper electrode end, and the black graphite adsorbed in the oil droplet is positively adsorbed. At the lower electrode end, when the light is injected into the oil droplet, the light can be reflected by the upper electrode and the transparent plate due to the white graphite adsorbed in the oil droplet, and then the user can obtain the reflected white. Light. On the contrary, if the upper electrode is negatively charged and the lower electrode is positively charged, the black graphite with positive charge suspended in the oil droplet is adsorbed to the upper electrode end, and the white graphite suspended in the oil droplet is negatively adsorbed. The lower electrode end, when the light is injected into the oil droplet, the light can be reflected by the black graphite in the oil droplet adsorbed on the upper electrode end, and then emitted by the upper electrode and the transparent plate to allow the user to obtain a black area.

According to the electronic device of the present invention, in addition to being displayed in the foregoing black or white manner, an oxide may be mixed into the nano particles such as white graphite to form an aggregate therein, thereby changing the color of the display; Among them, red iron oxide (such as hematite), chromium oxide (such as ruby), green cobalt oxide, cerium oxide (such as beryl), blue copper oxide (such as green) Turquoise; or yellow tungsten oxide, bismuth aluminum oxide (such as gold emerald).

In addition, the electronic device according to the present invention can be applied to various electronic devices having display functions. Preferably, the electronic device can be an electronic book or a flexible flat display.

Hereinafter, preferred embodiments of the present invention will be described in detail.

Example 1

First, referring to FIG. 1, an electronic device 100 is provided, which includes a substrate 101; a positively charged lower electrode 102a is formed on the substrate 101; a negatively charged upper electrode 103a is connected; and a transparent plate 104 is formed. On the upper electrode 103a; and an oil droplet 105 filled between the lower electrode 102a and the upper electrode 103a; wherein the oil droplets 105 are filled with a plurality of nano particles 107, 108 suspended in the liquid 106, and The nanoparticles 107, 108 are composed of a two-dimensional sheet structure.

In the preferred embodiment, the upper electrode 103a can be a transparent electrode so that light can be directly injected into the oil droplet 105 from above the pattern, and the light can be reflected by the suspended particles 107, 108 in the oil droplet 105. The upper electrode 103a and the transparent plate 104 are emitted to allow the user to obtain reflected light. The selection of the transparent electrode is not limited, and may generally be indium tin oxide or the like.

Further, in the present embodiment, the nanoparticles granules 107, 108 may be black graphite 107 (i.e., graphene) having a particle diameter of about 0.1 μm to 100 μm and white graphite 108 (i.e., hexagonal boron nitride). Please refer to the planar configuration shown in FIG. 4(a) and FIG. 4(b), which are white graphite and black graphite which are closely packed and have a benzene ring structure of a honeycomb-like crystal lattice. Since black graphite and white graphite are materials which are arranged by sp ² bonding, they can be regarded as a sheet-like structure having a single atom thickness. In view of this, black graphite and white graphite can be the best two-dimensional sheet-like structure of nano particles.

Furthermore, according to the embodiment, in order to make the black graphite 107 and the white graphite 108 react rapidly in the oil droplets 105, the black graphite 107 and the white graphite 108 are respectively doped with one atom, and the number of atoms doped is not limited, as long as The amount of charge of the black graphite and the white graphite can be up to the desired charge, and is generally about 1/1000 of the total number of atoms of the black graphite and the white graphite. In addition, in order to achieve a better oily effect of the black graphite 107 and the white graphite 108 in the oil droplets 105, the black graphite and the white graphite after the doping atoms may be heat treated at about 800 ° C for 30 minutes under hydrogen gas, or alternatively Heat treatment at about 600 ° C for 30 minutes under fluorine gas. The black graphite and white graphite having a two-dimensional sheet-like structure of nanometer size can be easily modified to form -CH ₃ or -CF ₃ at the end of the atom. Base to improve its oiliness. The type of use of the oil droplet 105 and the liquid 106 filled therein is not limited, and may be a microcapsule used in a general electronic device such as an electronic book.

As can be seen from the above description, the black graphite 107 and the white graphite 108 of the present embodiment have nanoparticles having positive and negative charges, respectively, and since the black graphite 107 and the white graphite 108 are essentially two-dimensional sheet-like structures, It maximizes its charge-to-mass ratio and reacts quickly to static electricity, enabling rapid color change in electronic devices such as e-books or flexible flat panel displays, and makes images clear and unambiguous.

In detail, it is known that a graphite particle having a spherical structure is assumed as a filler particle in an oil droplet in a conventional or conventional electronic book, and a graphene having a two-dimensional sheet structure is used in the present embodiment. The graphite particles are only charged on the surface, while the graphene can be charged on both sides, so the charge is twice the surface area of the sphere. Therefore, the charge/mass ratio (e/m) of the graphite particles of the spherical structure and the graphene of the two-dimensional sheet structure can be expressed by the following formula 1:

Among them, the graphite density is D, Δ l is the thickness of the single-layer graphene (0.3 nm), R is the solid spherical radius of the graphite (10 nm), and e is the electric charge.

From the e/m ratio calculated by Formula 1, the graphene is about 60 times that of the graphite particles. Therefore, as in the foregoing, the present example can maximize the charge-to-mass ratio of the two-dimensional sheet-like structure nanoparticle used, and the reaction rate to static electricity is fast, thereby being used in an electronic device such as an e-book or a flexible flat panel display. The color change is quickly and power-saving, and the resolution of the nanometer scale increases the resolution and makes the image clear and unambiguous.

According to this principle, in the present embodiment, the black graphite 107 is doped with boron atoms to be positively charged, and the white graphite 108 is doped with carbon atoms to be negatively charged. Therefore, as shown in FIG. 1, when the upper electrode 103a is negatively charged and the lower electrode 102a is positively charged, the black graphite 107 positively suspended in the oil droplet 105 is adsorbed to the upper electrode 103a end, and negatively charged. The white graphite 108 suspended in the oil droplets 105 is adsorbed to the lower electrode 102a end. Therefore, when the light is incident on the oil droplets 105, the light can be reflected by the black graphite 107 in the oil droplets 105 being adsorbed on the upper electrode 103a. Further, the upper electrode 103a and the transparent plate 104 are emitted to allow the user to obtain reflected black light.

In addition, in addition to the above-mentioned black (black graphite) or white (white graphite) display, it is also possible to mix oxides in the nano particles such as white graphite to form an aggregate therein, thereby changing the display thereof. Color; among them, red iron oxide (such as hematite), chromium oxide (such as ruby); green cobalt oxide, cerium-containing oxide (such as beryl); blue copper oxide (such as turquoise); or yellow tungsten oxide, bismuth aluminum oxide (such as gold emerald).

Example 2

As shown in Fig. 2, this embodiment is the same as the first embodiment except that the upper electrode 103b is positively charged and the lower electrode 102b is negatively charged.

Therefore, when the upper electrode 103b is positively charged and the lower electrode 102b is negatively charged, the white graphite 108 which is negatively suspended in the oil droplet 105 is adsorbed to the upper electrode 103b end, and is positively suspended in the oil droplet 105. The black graphite 107 is adsorbed on the end of the lower electrode 102b. Therefore, when the light is incident on the oil droplet 105, the light can be reflected by the white graphite 108 in the oil droplet 105 to be adsorbed on the upper electrode end, and then the upper electrode 103b and the transparent layer. The plate 104 is ejected to allow the user to obtain reflected white light.

Example 3

As shown in FIG. 3, this embodiment is the same as the first embodiment except that the upper electrodes 103a and 103b are respectively connected to the negative and positive charges, and the lower electrodes 102a and 102b are respectively connected to the positive and negative charges. The black graphite 107 and the white graphite 108 in the oil droplets 105 are displayed as shown in Fig. 3, whereby the color between the black and white can be displayed.

Therefore, the present invention provides an electronic device such as an e-book or a flexible flat panel display, which can make the image display speed fast and clear, and increase its legibility and wide application. The two-dimensional sheet-like structure nanoparticle used in the present invention has a charge-to-mass ratio which is significantly larger than that of the conventionally used stereostructure sphere, and the two-dimensional sheet-like structure nanoparticle of the present invention has a fast response rate to static electricity. Therefore, it is possible to achieve rapid color change in an electronic device such as an e-book or a flexible flat panel display, and to make the image clear and unambiguous.

The above-mentioned embodiments are merely examples for convenience of description, and the scope of the claims is intended to be limited to the above embodiments.

100. . . Electronic device

101. . . Substrate

102a, 102b. . . Lower electrode

103a, 103b. . . Upper electrode

104‧‧‧Transparent board

105‧‧‧ oil drops

106‧‧‧Liquid

107, 108‧‧‧ nanoparticle

1 is a schematic view of a preferred embodiment of the present invention.

2 is a schematic view of another preferred embodiment of the present invention.

3 is a schematic view of still another preferred embodiment of the present invention.

4(a) and 4(b) are schematic diagrams showing the planar structure of white graphite and black graphite in a preferred embodiment of the present invention.

100. . . Electronic device

101. . . Substrate

102a. . . Lower electrode

103a. . . Upper electrode

104. . . cant see thing

105. . . Oil drop

106. . . liquid

107. . . Nanoparticle

Claims (11)

An electronic device comprising: a substrate; a lower electrode formed on the substrate; an upper electrode; a transparent plate formed on the upper electrode; and an oil droplet filled in the lower electrode and Between the upper electrodes, wherein the oil droplets are filled with a plurality of nano particles suspended therein, and the nano particles are composed of a two-dimensional sheet structure, and the nano particles are black graphite and white stone. ink. The electronic device of claim 1, wherein the upper electrode is a transparent electrode. The electronic device of claim 2, wherein the transparent electrode is indium tin oxide. The electronic device according to claim 1, wherein the black graphite and the white graphite have a particle diameter of 0.1 μm to 100 μm. The electronic device according to claim 1, wherein the black graphite is graphene, and the white graphite is hexagonal boron nitride (hBN). The electronic device according to claim 1, wherein the black graphite and the white graphite are respectively doped with one atom, and the number of atoms doped is 1/1 of the total number of atoms of the black graphite and the white graphite. 1000 or less. The electronic device of claim 6, wherein the black graphite is doped with a boron atom. The electronic device of claim 6, wherein the white graphite is doped with carbon atoms. The electronic device of claim 1, wherein the nanoparticle further comprises an oxide which is iron oxide, chromium oxide, cobalt oxide, cerium oxide, copper. Oxide, tungsten oxide, or yttrium aluminum oxide. The electronic device of claim 9, wherein the oxide is hematite, ruby, beryl, turquoise, or gold emerald ( Chrysoberyl). The electronic device of claim 1, wherein the electronic device is an electronic book or a flexible flat display.