KR100646810B1 - Apparatus for emitting electrowetting display - Google Patents

Abstract

A light emitting type electro-wetting display device is provided to display images by controlling the surface size of fluid by coating phosphors on a substrate and using an electro-wetting effect. A first and second substrates(100,200) are arranged in parallel to each other at a predetermined interval. A first and second fluids(311,312) are positioned between the first and second substrates. At least, one of the first and second fluids has conductive polarity. The first and second fluids are not mixed with each other. A first and second electrodes(321,322) are used for applying voltages to the first and second fluids. An insulating layer(331) is positioned between the first and second fluids. A light emitting layer having a light emitting material pattern is formed on the inner surface of the first substrate.

Description

Light-emitting electrowetting display device {Apparatus for emitting electrowetting display}

1 is a schematic diagram of a conventional active light emitting liquid crystal display device.

2 is a schematic diagram of a display device using a conventional electrowetting phenomenon, (a) is a normal state (name display) of the colored water droplets when the switch S1 is off, (b) is a dark display state when the switch S1 is on Are schematic diagrams respectively.

3 is a schematic diagram of a light emitting electrowetting display device to which the present invention is applied.

4 is a schematic view of a light emitting electrowetting display device according to an embodiment of the present invention.

5 is a schematic diagram illustrating a pixel off state in FIG. 4.

FIG. 6 is a schematic diagram illustrating a pixel on state in FIG. 4.

7 is a schematic diagram illustrating a color implementation state in FIG. 4.

8 is a schematic view of a light emitting electrowetting display device according to another embodiment of the present invention.

9 is a schematic diagram illustrating a pixel on state in FIG. 8.

10 is a schematic diagram illustrating a pixel off state in FIG. 8.

FIG. 11 is a schematic diagram illustrating a color implementation state in FIG. 8.

12 is a schematic diagram of a light emitting electrowetting display device according to still another embodiment of the present invention.

FIG. 13 is a schematic diagram illustrating a pixel off state in FIG. 12.

14 is a schematic diagram illustrating a pixel on state in FIG. 12.

15 is a schematic diagram illustrating a color implementation state in FIG. 12.

Explanation of symbols on the main parts of the drawings

100: first substrate 111: black matrix (BM)

112: light emitting layer 200: second substrate

300: light emitting electrowetting unit 311: first fluid

312 Second Fluid 313 Bulkhead

321: first electrode 322: second electrode

331 insulating film 400 light source

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a light emitting electrowetting display device, and in particular, a phosphor that emits light to be irradiated with UV (Ultraviolet) light is applied to a substrate, and the surface size of the fluid is controlled by using an electrowetting phenomenon. A light emitting electrowetting display device suitable for display.

1 is a schematic view of a conventional active light emitting liquid crystal display device, which is a technology of Korean Patent Application Publication No. 1997-0016689.

As shown therein, the liquid crystal display device 30; A rear light source 21 installed on a rear surface of the liquid crystal display device 30 to generate excitation light; A front glass 29 installed at a front portion of the liquid crystal display device 30 to protect the liquid crystal display device 30; And an active light emitting part 27 coated on an inner surface of the windshield 29 to obtain a color pattern.

The liquid crystal display device 30 may include: first and second substrates 31 and 37 spaced apart from each other by a predetermined interval; A plurality of stripe-shaped first electrodes (32) disposed parallel to each other on an inner surface of the first substrate (31); A plurality of stripe-shaped second electrodes (36) disposed on an inner surface of the second substrate (37) in parallel with each other in an orthogonal direction to the arrangement direction of the first electrodes (32); A first alignment layer 33 formed on an inner surface of the first substrate 31 to cover the first electrode 32; A second alignment layer 35 formed on an inner surface of the second substrate 37 to cover the second electrode 36; The liquid crystal molecules 34 are interposed between the first and second alignment layers 33 and 35 and aligned in a rubbing direction formed on the first and second alignment layers 33 and 35.

This prior art improves brightness, contrast and viewing angle characteristics by applying laser paint instead of color filters among LCD components.

However, this prior art had the following problems.

That is, since the structure uses two polarizing plates, there is a problem in that the light efficiency is inferior.

In addition, there is a problem that the slow response speed of the liquid crystal deteriorates the characteristics of the light emitting material having a fast optical response speed.

In addition, since deterioration occurs in the UV light to which the liquid crystal is irradiated, the characteristics are deteriorated and there is a problem in reliability.

2 is a schematic diagram of a display device using a conventional electrowetting phenomenon, (a) is a normal state (name display) of the colored water droplets when the switch S1 is off, (b) is a dark display state when the switch S1 is on As a schematic diagram showing each of them, it is a technique of Japanese Patent Laid-Open No. 2004-287008.

As shown therein, the first transparent substrate 12 constituting the lowermost layer of the display device; A first transparent electrode 14 disposed on the first transparent substrate 12; An insulating layer (16) comprising an insulating film (16a) and a low surface energy film (16b) provided on said first transparent electrode (14); A second transparent electrode 15 provided on the insulating layer 16; A cavity 17 surrounding the second transparent electrode 15 at intervals; A second transparent substrate 18 constituting the uppermost layer provided on the cavity 17; Colored droplets (W) encapsulated in partitions of the cavity (17); A display device using an electrowetting phenomenon by applying an electric field to the colored droplet W. FIG.

Here, reference numeral 10 denotes a display device, E denotes a DC power supply, and S1 denotes a switch.

However, this conventional technology has the following problems.

That is, the circular shape is gathered by the surface tension of the water droplets in the absence of an electric field, and when the electric field is applied, it is difficult to control the position of the water droplets by implementing only the first fluid.

In addition, the colored droplets play a role of blocking light, thereby limiting the monochrome display structure.

Accordingly, the present invention has been proposed to solve the conventional problems as described above, and an object of the present invention is to apply a phosphor to the UV light to be irradiated on the substrate and to adjust the surface size of the fluid using the electrowetting phenomenon The present invention provides a light emitting electrowetting display device capable of displaying an image.

In order to achieve the above object, a light-emitting electrowetting display device according to an embodiment of the present invention,

First and second substrates spaced apart from each other by a predetermined interval; First and second fluids positioned between the first and second substrates, the at least one fluid having conductivity or polarity and not mixing with each other; First and second electrodes applying voltages to the first and second fluids, respectively; And an insulating layer disposed between the second fluid and the second electrode, wherein the first substrate includes a light emitting layer having a pattern coated with a light emitting material to obtain a color pattern on an inner surface thereof. It is characterized by technical configuration.

Hereinafter, an embodiment according to the present invention as described above, the light-emitting electrowetting display device will be described with reference to the drawings.

3 is a schematic diagram of a light emitting electrowetting display device to which the present invention is applied.

As shown therein, the first and second substrates 100 and 200 are spaced apart from each other by a predetermined interval in parallel with each other; And a light emitting electrowetting unit 300 positioned between the first and second substrates 100 and 200 and displaying an image by adjusting a surface size of a fluid using an electrowetting phenomenon. do.

In addition, the light-emitting electrowetting display apparatus may include a light source 400 installed on an outer surface of the first substrate 100 or the second substrate 200 to generate excitation light.

4 is a schematic view of a light emitting electrowetting display device according to an embodiment of the present invention.

As shown therein, the first and second substrates 100 and 200 are spaced apart from each other by a predetermined interval in parallel with each other; First and second fluids 311 and 312 positioned between the first and second substrates 100 and 200, wherein at least one fluid has conductivity or polarity and is not mixed with each other; First and second electrodes 321 and 322 for applying a voltage to the first and second fluids 311 and 312, respectively; And an insulating film 331 disposed between the second fluid 312 and the second electrode 322, wherein the first substrate 100 is coated with a light emitting material to obtain a color pattern on an inner surface thereof. It characterized in that it comprises a light emitting layer 112 having a pattern.

The first and second fluids 311 and 312 are characterized in that one fluid is made of a material that blocks light, and the other fluid is made of a material that passes light.

The light blocking material is characterized in that it is composed of one or two or more of a combination of zinc oxide, titanium dioxide, iron oxide, magnesium oxide.

The light-emitting electrowetting display device is formed to have a height that separates the first fluid 311 or the second fluid 312, and further includes a partition wall 313 for uniformly distributing fluid for each pixel. It is characterized by.

The partition 313 is characterized by being composed of a hydrophilic material.

The light emitting layer 112 is R (red, red), G (green, green), B (Blue, blue), C (Cyan, cyan), M (Magenta, magenta), Y (Yellow, yellow), white (White) It is characterized in that the pattern formed by applying the light emitting material in a combination of two or more.

The first substrate 100 may further include a black matrix (BM) 111 on which a black UV blocking film is formed.

In addition, the light-emitting electrowetting display apparatus may include a light source 400 installed on an outer surface of the first substrate 100 or the second substrate 200 to generate excitation light.

The light source 400 is characterized by consisting of a UV light emitting diode.

8 is a schematic view of a light emitting electrowetting display device according to another embodiment of the present invention.

As shown therein, the first and second substrates 100 and 200 are spaced apart from each other by a predetermined interval in parallel with each other; First and second fluids 311 and 312 positioned between the first and second substrates 100 and 200, wherein at least one fluid has conductivity or polarity and does not mix with each other; First and second electrodes 321 and 322 for applying a voltage to the first and second fluids 311 and 312, respectively; And an insulating film 331 positioned between the second fluid 312 and the first electrode 321, wherein one of the first and second fluids is mixed with a light emitting material. It is done.

The first and second fluids 311 and 312 are characterized in that one fluid is made of a material that blocks light, and the other fluid is made of a material that passes light.

The light blocking material is characterized in that it is composed of one or two or more of a combination of zinc oxide, titanium dioxide, iron oxide, magnesium oxide.

The light-emitting electrowetting display device is formed to have a height that separates the first fluid 311 or the second fluid 312, and further includes a partition wall 313 for uniformly distributing fluid for each pixel. It is characterized by.

The partition 313 is characterized by being composed of a hydrophilic material.

The mixture of the light emitting materials is R (Red, red), G (Green, green), B (Blue, blue), C (Cyan, cyan), M (Magenta, magenta), Y (Yellow, yellow) , White (White) is characterized in that the light emitting material is mixed in two or more combinations.

The first substrate 100 may further include a black matrix (BM) 111 on which a black UV blocking film is formed.

In addition, the light-emitting electrowetting display apparatus may include a light source 400 installed on an outer surface of the first substrate 100 or the second substrate 200 to generate excitation light.

The light source 400 is characterized by consisting of a UV light emitting diode.

12 is a schematic diagram of a light emitting electrowetting display device according to still another embodiment of the present invention.

As shown therein, the first and second substrates 100 and 200 are spaced apart from each other by a predetermined interval in parallel with each other; First and second fluids 311 and 312 positioned between the first and second substrates 100 and 200, wherein at least one fluid has conductivity or polarity and is not mixed with each other; First and second electrodes 321 and 322 for applying a voltage to the first and second fluids 311 and 312, respectively; An insulating film 331 positioned between the second fluid 312 and the second electrode 322; And a light source 400 installed on an outer surface of the first substrate 100 or the second substrate 200 to generate excitation light and having an R, G, and B pattern matched to each pixel. It features.

The first and second fluids 311 and 312 are characterized in that one fluid is made of a material that blocks light, and the other fluid is made of a material that passes light.

The light blocking material is characterized in that it is composed of one or two or more of a combination of zinc oxide, titanium dioxide, iron oxide, magnesium oxide.

The light-emitting electrowetting display device is formed to have a height that separates the first fluid 311 or the second fluid 312, and further includes a partition wall 313 for uniformly distributing fluid for each pixel. It is characterized by.

The partition 313 is characterized by being composed of a hydrophilic material.

The light source 400 is R (red, red), G (Green, green), B (Blue, blue), C (Cyan, cyan), M (Magenta, magenta), Y (Yellow, yellow), white (White) characterized in that the pattern of the light source is formed by a combination of two or more.

The light source 400 is characterized by consisting of a UV light emitting diode.

The operation of the light-emitting electrowetting display device according to the present invention configured as described above will be described in detail with reference to the accompanying drawings.

First, the present invention intends to display an image by applying a phosphor that emits light to the UV light to be irradiated onto a substrate and adjusting the surface size of the fluid using an electrowetting phenomenon.

3 is a schematic view of a light emitting electrowetting display device according to the present invention.

Thus, the first substrate 100 and the second substrate 200 are spaced apart by a predetermined interval in parallel with each other, so that a predetermined interval is spaced from each other.

The light-emitting electrowetting unit 300 is positioned between the first and second substrates 100 and 200 and displays an image by adjusting the surface size of the fluid by using the electrowetting phenomenon.

In addition, the light source 400 is installed on the outer surface of the first substrate 100 or the second substrate 200 to generate the excitation light.

The configuration and operation of the present invention will be described in detail with reference to the following examples.

<Example 1>

4 is a schematic view of a light emitting electrowetting display device according to an embodiment of the present invention, FIG. 5 is a schematic view showing a pixel off state in FIG. 4, FIG. 6 is a schematic view showing a pixel on state in FIG. 4, and FIG. 7 is a schematic diagram illustrating a color implementation in FIG. 4.

Therefore, the first substrate 100 and the second substrate 200 are arranged to be spaced apart by a predetermined interval in parallel with each other.

The first fluid 311 and the second fluid 312 are positioned between the first and second substrates 100 and 200, and at least one fluid has conductivity or polarity and is not mixed with each other. Thus, in Example 1, the first fluid 311 is positioned at the lower end of the first substrate 100, and the second fluid is positioned at the upper end of the second substrate 200.

In addition, the first electrode 321 and the second electrode 322 apply voltage to the first and second fluids 311 and 312, respectively. Therefore, in the first embodiment, the first electrode 321 is positioned between the first substrate 100 and the first fluid 311 to apply a voltage to the first fluid 311, and the second electrode 322. ) May be positioned between the second substrate 200 and the second fluid 312 to apply a voltage to the second fluid 312. The electrodes 321 and 322 perform a function of uniformly distributing the fluid for each pixel. In addition, the gray scale is implemented by adjusting the magnitude of the voltage applied to the first electrode 321 and the second electrode 322.

In addition, the insulating film 331 is positioned between the second fluid 312 and the second electrode 322 to perform an insulating function.

In addition, in the first embodiment, the light emitting layer 112 is included, and the light emitting layer 112 allows the light emitting material to be coated on the inner surface of the first substrate 100 to obtain a color pattern. That is, the light emitting phosphor may be coated with R, G, and B.

In more detail, each feature in the first embodiment is as follows.

1) The first and second fluids 311 and 312 are configured such that one fluid is made of a material that blocks light, and the other fluid is made of a material that passes light. For example, the first fluid 311 may be made of a material that passes light, and the second fluid 312 may be made of a material that blocks light. The ability to block light (eg UV light) can be categorized by the type of chemical absorption and by the type of physical reflection and dispersion. Thus, the material blocking the light constituting the second fluid 312 may be a material such as zinc oxide, titanium dioxide, iron oxide, magnesium oxide, etc., which belongs to the type of physically reflecting and dispersing UV light .

2) In addition, the partition wall 313 may be formed at a height that separates the first fluid 311 or the second fluid 312, and may uniformly distribute the fluid for each pixel. 4 to 7 illustrate an example in which the partition wall 313 is formed to uniformly distribute the second fluid 312. The partition 313 is made of a hydrophilic material. In addition, the partition wall 313 may not only be set at a height that separates the second fluid 312 but also may be configured to have a height that isolates both the first fluid 311 and the second fluid 312. It is also possible to implement the present invention without such a physical partition 313.

3) In Example 1, the light emitting layer 112 may be a combination of two or more of R (red), G (green), B (blue), C (cyan), M (magenta), Y (yellow), and white (White). As a result, a pattern coated with a light emitting material is formed. Preferably, the pattern is formed of RGB, CMY, RGBCMY, RGB + White, CMY + White, and RGBCMY + White. In this case, the size of each pixel coated with the light emitting material may be the same or different.

4) The first substrate 100 further includes a black matrix (BM) 111 on which a black UV blocking film is formed. The black matrix 111 further improves the display quality of the light emitting layer 112.

5) The light source 400 is installed on the outer surface of the first substrate 100 or the second substrate 200 to generate the excitation light. 4 to 7 illustrate an example in which a light source 400 is installed on an outer surface of the second substrate 200 to generate excitation light. The light source 400 may be configured as a UV light emitting diode or may be configured as a surface light source.

6) Thus, in Example 1, the operation is as follows.

a) pixel off

In the state in which no electric field is applied, the second fluid 312 is applied to the entire surface of the pixel, and the light of the UV LED emitted from the light source 400 is irradiated to the second fluid 312 to be blocked. (See Figure 5)

b) pixel on

When an electric field is applied to the first and second electrodes 321 and 322, the second fluid 312 is pushed and moved by the surface tension of the first fluid 311. UV light of the external light source 400 passes and is irradiated to the light emitting layer 312 coated on the first substrate 100, and the light emitting layer 312 emits respective intrinsic wavelengths. (See Figure 6)

<Example 2>

8 is a schematic view of a light emitting electrowetting display device according to another embodiment of the present invention, FIG. 9 is a schematic view showing a pixel on state in FIG. 8, FIG. 10 is a schematic view showing a pixel off state in FIG. 8, and FIG. 11 is a schematic diagram illustrating a color implementation state in FIG. 8.

Therefore, the first substrate 100 and the second substrate 200 are arranged to be spaced apart by a predetermined interval in parallel with each other.

The first fluid 311 and the second fluid 312 are positioned between the first and second substrates 100 and 200, and at least one fluid has conductivity or polarity and is not mixed with each other. Thus, in Example 2, the first fluid 311 is positioned on the upper end of the second substrate 200, and the second fluid is positioned on the lower end of the first substrate 100.

In addition, the first electrode 321 and the second electrode 322 apply voltage to the first and second fluids 311 and 312, respectively. Thus, in Embodiment 2, the first electrode 321 is positioned between the first substrate 100 and the second fluid 312 so that a voltage can be applied to the second fluid 312 and the second electrode 322 is provided. ) May be positioned between the second substrate 200 and the first fluid 311 to apply a voltage to the first fluid 311. The electrodes 321 and 322 perform a function of uniformly distributing the fluid for each pixel. In addition, the gray scale is implemented by adjusting the magnitude of the voltage applied to the first electrode 321 and the second electrode 322.

In addition, the insulating layer 331 is positioned between the second fluid 312 and the first electrode 321 to perform an insulating function.

In Example 2, the light emitting material is mixed with one of the first and second fluids. The light emitting material may be formed of a material emitting R, G, or B when irradiated with UV light, or a material emitting C, M, or Y.

The features of each of the second embodiment will be described in more detail as follows.

1) The first and second fluids 311 and 312 are configured such that one fluid is made of a material that blocks light, and the other fluid is made of a material that passes light. For example, the first fluid 311 may be made of a material that passes light, and the second fluid 312 may be made of a material that blocks light. The ability to block light (eg UV light) can be categorized by the type of chemical absorption and by the type of physical reflection and dispersion. Thus, the material blocking the light constituting the second fluid 312 may be a material such as zinc oxide, titanium dioxide, iron oxide, magnesium oxide, etc., which belongs to the type of physically reflecting and dispersing UV light .

2) The partition wall 313 is formed to have a height that separates the first fluid 311 or the second fluid 312, so that the fluid can be uniformly distributed for each pixel. 8 to 11 illustrate an example in which the partition wall 313 is formed to uniformly distribute the second fluid 312. The partition 313 is made of a hydrophilic material. In addition, the partition wall 313 may not only be set at a height that separates the second fluid 312 but also may be configured to have a height that isolates both the first fluid 311 and the second fluid 312. It is also possible to implement the present invention without such a physical partition 313.

3) In Example 2, the light emitting material mixed in the fluid is two of R (red), G (green), B (blue), C (cyan), M (magenta), Y (yellow), and white (White). It is to be formed by the above combination. Preferably, the pattern is formed of RGB, CMY, RGBCMY, RGB + White, CMY + White, and RGBCMY + White. In this case, the size of each pixel coated with the light emitting material may be the same or different.

4) The first substrate 100 further includes a black matrix (BM) 111 on which a black UV blocking film is formed. The black matrix 111 further improves the display quality of the light emitting layer 112.

5) The light source 400 is installed on the outer surface of the first substrate 100 or the second substrate 200 to generate the excitation light. 8 to 11 illustrate an example in which a light source 400 is installed on an outer surface of the second substrate 200 to generate excitation light. The light source 400 may be configured as a UV light emitting diode or may be configured as a surface light source.

6) Thus, in Embodiment 2, the operation is as follows.

a) pixel on

In the state in which no electric field is applied, the light of the UV LED of the light source 400 is irradiated to the fluid mixed with the luminescent material, and the fluid mixed with the luminescent material emits light of each wavelength. (See FIG. 9)

b) pixel off

When an electric field is applied to the first and second electrodes 321 and 322, the second fluid 312 is pushed and moved due to the surface tension of the first fluid 311. In addition, the UV light of the external light source 400 passes and is absorbed by the black matrix 111 having the black UV blocking film coated on the first substrate 100 to display black. Fluid mixed with the light-emitting material moved to one side is collected under the black matrix 111. (See FIG. 10)

<Example 3>

12 is a schematic view of a light emitting electrowetting display device according to still another embodiment of the present invention, FIG. 13 is a schematic view showing a pixel off state in FIG. 12, FIG. 14 is a schematic view showing a pixel on state in FIG. 12, 15 is a schematic diagram illustrating a color implementation state in FIG. 12.

Therefore, the first substrate 100 and the second substrate 200 are arranged to be spaced apart by a predetermined interval in parallel with each other.

The first fluid 311 and the second fluid 312 are positioned between the first and second substrates 100 and 200, and at least one fluid has conductivity or polarity and is not mixed with each other. Thus, in Example 3, the first fluid 311 is positioned at the lower end of the first substrate 100 and the second fluid is positioned at the upper end of the second substrate 200.

In addition, the first electrode 321 and the second electrode 322 apply voltage to the first and second fluids 311 and 312, respectively. Therefore, in Embodiment 3, the first electrode 321 is positioned between the first substrate 100 and the first fluid 311 so that a voltage can be applied to the first fluid 311, and the second electrode 322 is provided. ) May be positioned between the second substrate 200 and the second fluid 312 to apply a voltage to the second fluid 312. The electrodes 321 and 322 perform a function of uniformly distributing the fluid for each pixel. In addition, the gray scale is implemented by adjusting the magnitude of the voltage applied to the first electrode 321 and the second electrode 322.

In addition, the insulating film 331 is positioned between the second fluid 312 and the second electrode 322 to perform an insulating function.

In addition, in Embodiment 3, the light source 400 is included. The light source 400 has R, G, and B patterns that match each pixel, so that R, G, and B are irradiated to the rear surface of each pixel. . The light source 400 and the pixel may have various structures such as a stripe, a delta, a honeycomb, and the like.

The features of each of the third embodiment will be described in more detail as follows.

1) The first and second fluids 311 and 312 are configured such that one fluid is made of a material that blocks light, and the other fluid is made of a material that passes light. For example, the first fluid 311 may be made of a material that passes light, and the second fluid 312 may be made of a material that blocks light. The ability to block light (eg UV light) can be categorized by the type of chemical absorption and by the type of physical reflection and dispersion. Thus, the material blocking the light constituting the second fluid 312 may be a material such as zinc oxide, titanium dioxide, iron oxide, magnesium oxide, etc., which belongs to the type of physically reflecting and dispersing UV light .

2) In addition, the partition wall 313 may be formed at a height that separates the first fluid 311 or the second fluid 312, and may uniformly distribute the fluid for each pixel. 12 to 15 illustrate an example in which the partition wall 313 is formed to uniformly distribute the second fluid 312. The partition 313 is made of a hydrophilic material. In addition, the partition wall 313 may not only be set at a height that separates the second fluid 312 but also may be configured to have a height that isolates both the first fluid 311 and the second fluid 312. It is also possible to implement the present invention without such a physical partition 313.

3) In a third embodiment, the light source 400 is a combination of two or more of R (red), G (green), B (blue), C (cyan), M (magenta), Y (yellow), and white (White). The pattern is formed to enable color implementation. Preferably, the pattern is formed of RGB, CMY, RGBCMY, RGB + White, CMY + White, and RGBCMY + White. In this case, the size of each pixel spherical by the pattern of the light source 400 may be the same or different. The light source 400 is installed on the outer surface of the first substrate 100 or the second substrate 200 to generate excitation light. 12 to 15 illustrate an example in which a light source 400 is installed on an outer surface of the second substrate 200 to generate excitation light. The light source 400 may be configured as a UV light emitting diode or may be configured as a surface light source.

4) Thus, in Example 3, the operation is as follows.

a) pixel off

In the state in which no electric field is applied, the second fluid 312 is applied to the entire surface of the pixel, and light emitted from the light source 400 is irradiated to the second fluid 312 to be blocked. (See FIG. 13)

b) pixel on

When an electric field is applied to the first and second electrodes 321 and 322, the second fluid 312 is pushed and moved by the surface tension of the first fluid 311. In addition, light of a specific wavelength emitted from the external light source 400 is transmitted to display a color. (See Figure 14)

As described above, the present invention is to apply a phosphor to the UV light to be irradiated on the substrate and to display the image by adjusting the surface size of the fluid using the electrowetting phenomenon.

Although the above has been described as being limited to the preferred embodiment of the present invention, the present invention is not limited thereto and various changes, modifications, and equivalents may be used. Therefore, the present invention can be applied by appropriately modifying the above embodiments, it will be obvious that such application also belongs to the scope of the present invention based on the technical idea described in the claims below.

As described above, the light-emitting electrowetting display device according to the present invention has an effect of applying an phosphor to the UV light to be irradiated onto a substrate and adjusting the surface size of the fluid using an electrowetting phenomenon to display an image. Will be.

Conventional display devices include STN (Super Twisted Nematic) LCD, Thin-Film Transistor (TFT) LCD, Plasma Display Panel (PDP), Field Emission Display (FED), Organic Light Emitting Diode (OLED), Electrophoretic Display ( Various devices such as electrophoretic displays and electrochromic displays are being commercialized or developed. Among them, LCDs occupy a large market, but there are problems such as low light efficiency and dependence on viewing angle by using polarizer. Also, self-emitting devices such as PDP and OLED have high resolution, brightness, power consumption, and lifespan. have. Accordingly, the present invention relates to a display method of controlling the amount of light in the opening by changing the surface size of the fluid using an electrowetting phenomenon, and more particularly, to a light emitting structure. The present invention is excellent in brightness, viewing angle, power consumption, high resolution, high contrast ratio, and the like, and has a merit in that a video is implemented and can be applied to a flexible substrate.

In addition, the present invention is superior in power consumption and high resolution in comparison with the same light emitting device PDP, and compared to the OLED has an excellent durability compared to the worsening of properties when the light emitting material of the OLED is exposed to moisture or air. have.

Claims (25)

First and second substrates spaced apart from each other by a predetermined interval; First and second fluids positioned between the first and second substrates, the at least one fluid having conductivity or polarity and not mixing with each other; First and second electrodes applying voltages to the first and second fluids, respectively; And an insulating film positioned between the second fluid and the second electrode, The first substrate is a light-emitting electrowetting display device comprising a light emitting layer having a pattern coated with a light emitting material to obtain a color pattern on the inner surface. The method according to claim 1, wherein the first and second fluid, A light-emitting electrowetting display device, characterized in that one fluid is made of a material that blocks light, and the other fluid is made of a material that passes light. The method of claim 2, wherein the light blocking material, A light-emitting electrowetting display device comprising one or more of zinc oxide, titanium dioxide, iron oxide, and magnesium oxide. The method according to claim 1, The light-emitting electrowetting display device, A light emitting electrowetting display device, wherein the first fluid or the second fluid is formed to have a height that separates the first fluid or the second fluid. The method according to claim 4, wherein the partition wall, An electroluminescent electrowetting display device comprising a hydrophilic material. The method according to claim 1, wherein the light emitting layer, A light-emitting electrowetting display device, characterized in that the pattern is coated with a light emitting material in a combination of two or more of R, G, B, C, M, Y, white. The method according to claim 1, wherein the first substrate, A light emitting electrowetting display device, characterized in that it further comprises a black matrix formed with a black UV blocking film. The method according to any one of claims 1 to 7, wherein the light emitting electrowetting display device, And a light source disposed on an outer surface of the first substrate or the second substrate to generate excitation light. The method according to claim 8, wherein the light source, Light-emitting electrowetting display device, characterized in that consisting of a UV light emitting diode. First and second substrates spaced apart from each other by a predetermined interval; First and second fluids positioned between the first and second substrates, the at least one fluid having conductivity or polarity and not mixing with each other; First and second electrodes applying voltages to the first and second fluids, respectively; And an insulating film positioned between the second fluid and the first electrode. A light emitting electrowetting display device, characterized in that a light emitting material is mixed in one of the first and second fluids. The method according to claim 10, wherein the first and second fluid, A light-emitting electrowetting display device, characterized in that one fluid is made of a material that blocks light, and the other fluid is made of a material that passes light. The method of claim 11, wherein the light blocking material, A light-emitting electrowetting display device comprising one or more of zinc oxide, titanium dioxide, iron oxide, and magnesium oxide. The method of claim 10, wherein the light emitting electrowetting display device, A light emitting electrowetting display device, wherein the first fluid or the second fluid is formed to have a height that separates the first fluid or the second fluid. The method according to claim 13, wherein the partition, An electroluminescent electrowetting display device comprising a hydrophilic material. The method of claim 10, wherein the fluid mixed with the light emitting material, A light emitting electrowetting display device, characterized in that the light emitting material is mixed in at least two combinations of R, G, B, C, M, Y, and white. The method of claim 10, wherein the first substrate, A light emitting electrowetting display device, characterized in that it further comprises a black matrix formed with a black UV blocking film. The light emitting electrowetting display device according to any one of claims 10 to 16, And a light source disposed on an outer surface of the first substrate or the second substrate to generate excitation light. The method of claim 17, wherein the light source, Light-emitting electrowetting display device, characterized in that consisting of a UV light emitting diode. First and second substrates spaced apart from each other by a predetermined interval; First and second fluids positioned between the first and second substrates, the at least one fluid having conductivity or polarity and not mixing with each other; First and second electrodes applying voltages to the first and second fluids, respectively; An insulating film positioned between the second fluid and the second electrode; And a light source disposed on an outer surface of the first substrate or the second substrate to generate excitation light and having an R, G, and B pattern matched to each pixel. . The method of claim 19, wherein the first and second fluid, A light-emitting electrowetting display device, characterized in that one fluid is made of a material that blocks light, and the other fluid is made of a material that passes light. The method of claim 20, wherein the light blocking material, A light-emitting electrowetting display device comprising one or more of zinc oxide, titanium dioxide, iron oxide, and magnesium oxide. The method according to claim 19, The light-emitting electrowetting display device, A light emitting electrowetting display device, wherein the first fluid or the second fluid is formed to have a height that separates the first fluid or the second fluid. The method according to claim 22, The partition wall, An electroluminescent electrowetting display device comprising a hydrophilic material. The method of claim 19, wherein the light source, A light emitting electrowetting display device, characterized in that the pattern of the light source is formed by a combination of two or more of R, G, B, C, M, Y, and white. The light source according to any one of claims 19 to 24, wherein the light source is Light-emitting electrowetting display device, characterized in that consisting of a UV light emitting diode.

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