KR101346929B1 - Smart window using electrochromic - Google Patents

Abstract

The present invention relates to a smart window using electrochromic comprising: a first glass plate which is transparent; a second glass plate which is transparent facing the first glass plate; a first electrochromic including a first electrochromic layer having a first pattern type transparent area; a second electrochromic unit including a second electrochromic layer having a second pattern type transparent area; a third electrochromic unit including a third electrochromic layer not having a third pattern type transparent area; an operating unit including a control circuit applying voltages to and which is independently connected to the first, second and third electrochromic units; a power supply unit for supplying power to the operating unit; and a controller to control the voltages to be independently applied to the first, second and third electrochromic units. Each of the first, second and third electrochromic units has a pair of transparent electrode layer facing each other. By using the present invention, the smart window using electrochromic can control the amount of light transmission according to changes in environments in five steps, so that it can effectively deal with environments outside. Also, it can variously control the color and shape of light transmission, so that it can be utilized as a good interior material and effectively block certain type of lights, and gradually control the amount of light transmission depending on changes in the area of light transmission by controlling the shape of light transmission. [Reference numerals] (AA) Sunlight

Description

Smart window using electrochromic

The present invention relates to a smart window using the electrochromic.

In recent years, energy shortages have become a hot topic worldwide. As social concerns about energy shortages are concentrated, attempts to conserve energy are taking place everywhere.

Most office and residential buildings, on average, use 30-40 percent more energy for building maintenance energy sources for ventilation and lighting, because in sunny days to prevent glare and clouds On a cloudy day, because of the dark environment, even during the day, the curtains and lights are used to waste energy.

Therefore, the effective control of energy exchange between the exterior and the interior of the building through the windows of the building is a very important part to save energy, and research on this is needed.

In particular, research that can freely control the transmittance of sunlight is urgent, and for this purpose, a technique related to a smart window using an electrochromic material has recently been disclosed.

Electrochromic materials have the property of reversibly discoloring and discoloring based on a redox reaction generated by applying a voltage. For example, an electrochromic material does not have a color when no voltage is applied from the outside. When applied, it refers to a material that exhibits a reversible color change that takes on a color.

Related to this, Korean Patent Laid-Open Publication No. 10-2012-0109962 (hereinafter referred to as 'prior art') has been disclosed as a technique for changing the light transmittance of a window using an electrochromic material.

The prior art is an electrochromic device packaged in two conductive materials and includes an electrochromic composite material or a liquid electrochromic material, and provides an electrochromic device that changes transparency and color by supplying power from a solar panel. do.

SUMMARY OF THE INVENTION An object of the present invention is to provide a smart window using an electrochromic which can adjust light transmittance step by step.

Smart window using the electrochromic according to the present invention for achieving the above object is the first glass plate is provided with a transparent glass; A second glass plate positioned to face the first glass plate and provided with transparent glass; A first electrochromic unit including a first electrochromic layer having a transparent region of a first pattern shape; A second electrochromic unit including a second electrochromic layer having a transparent region of a second pattern shape; A third electrochromic unit including a third electrochromic layer having no transparent region; A driving unit including a control circuit independently connected to the first electrochromic unit, the second electrochromic unit, and the third electrochromic unit to apply a voltage; A power supply unit supplying power to the driving unit; A controller configured to control voltages to be individually applied to the first electrochromic unit, the second electrochromic unit, and the third electrochromic unit; The first electrochromic unit, the second electrochromic unit, and the third electrochromic unit each have a pair of opposing transparent electrode layers.

In this case, the controller controls the light transmittance in a fifth step according to the color development or discoloration of the first electrochromic unit, the second electrochromic unit, and the third electrochromic unit.

Here, the first electrochromic layer, the second electrochromic layer, and the third electrochromic layer each have a separate color.

In addition, the sizes of the transparent regions of the first pattern shape and the second pattern shape are different, and the transparent areas of the first pattern shape and the second pattern shape exist to cross each other.

As described above, the present invention has the following effects.

First, the smart window using the electrochromic of the present invention can adjust the light transmittance in a fifth step according to the change in the external environment, it is possible to flexibly cope with the change in the external environment.

Second, the smart window using the electrochromic of the present invention can be variously adjusted the color or light transmission shape, the smart window according to the color change has the effect of effectively blocking the interior effect and light of a specific wavelength, and the light transmission shape By adjusting the light transmittance according to the change in the light transmission area can be controlled step by step.

BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the invention.
1 is a block diagram showing a schematic configuration of a smart window using an electrochromic according to an embodiment of the present invention.
2 is a reference diagram illustrating first, second and third electrochromic layers according to an exemplary embodiment of the present invention.
3 is a reference diagram showing that the light transmittance is controlled in a fifth step according to an embodiment of the present invention.
4 is a reference diagram showing that the first, second and third electrochromic units according to an exemplary embodiment of the present invention are independently connected to a power supply unit.
5 is a block diagram of a smart window using an electrochromic according to an embodiment of the present invention.

Hereinafter, the configuration of the present invention will be described in detail with reference to the accompanying drawings.

Prior to this, the terms used in the specification and claims should not be construed in a dictionary sense, and the inventor may, on the principle that the concept of a term can be properly defined in order to explain its invention in the best way And should be construed in light of the meanings and concepts consistent with the technical idea of the present invention.

Therefore, the embodiments shown in the present specification and the drawings are only exemplary embodiments of the present invention, and not all of the technical ideas of the present invention are presented. Therefore, various equivalents It should be understood that water and variations may exist.

The preferred embodiments of the present invention will be described in more detail with reference to the accompanying drawings, in which technical sections already known will be omitted or compressed for simplicity of explanation.

1 is a block diagram showing a schematic configuration of a smart window using an electrochromic according to an embodiment of the present invention, Figure 2 is a first, second, third electrochromic layer according to an embodiment of the present invention 3 is a reference diagram showing the light transmittance is controlled in a fifth step according to an embodiment of the present invention, Figure 4 is a first, second, second according to an embodiment of the present invention It is a reference diagram showing that the electrochromic unit of 3 is independently connected to a power supply unit, and FIG. 5 is a block diagram of a smart window using an electrochromic according to an embodiment of the present invention.

Hereinafter, a smart window using an electrochromic device according to a preferred embodiment of the present invention will be described in detail with reference to FIGS. 1 to 5.

Referring to FIG. 1, the smart window using the electrochromic includes a first glass plate 100, a second glass plate 200, a first electrochromic unit 300, a second electrochromic unit 400, and a third The electrochromic unit 500, the driving unit 600, the power supply unit 700, and the control unit 800 are included.

The smart window using the electrochromic includes a first glass plate 100, a second glass plate 200, a first electrochromic unit 300, a second electrochromic unit 400, and a third electrochromic unit 500. ) Constitutes the smart window body 10.

Here, the first glass plate 100 and the second glass plate 200 are made of transparent glass having excellent light transmittance, and the first glass plate 100 and the second glass plate 200 are disposed to face each other.

In addition, the first glass plate 100 and the second glass plate 200 may be made of thermoplastic polymer such as polycarbonate (PC), polybutylene terephthalate (PBT), polyacryl (PA), polyurethane (PU), or the like. have.

The first glass plate 100 has an outer surface facing outward and is a layer to which solar radiation is first incident, and the second glass plate 200 has an inner surface facing the interior.

The thickness of the first glass plate 100 and the second glass plate 200 can be variously adjusted according to the purpose of using the smart window for a glass window of a vehicle, a glass window of a building, a house window, a living room, or a housing interior of a veranda.

The first glass plate 100 and the second glass plate 200 further include a thin film coating layer (not shown) made of a polymer material to compensate for heat resistance, strength, scratch resistance, and UV blocking. It may include.

The first electrochromic unit 300, the second electrochromic unit 400, and the third electrochromic unit 500 are positioned between the first glass plate 100 and the second glass plate 200. Are arranged sequentially.

The first electrochromic unit 300 includes a first electrochromic layer 310 having a transparent region 50 of the first pattern shape 350.

As the first electrochromic unit 300 is applied with a voltage, other regions except for the transparent region 50 of the first pattern shape 350 provided in the first electrochromic layer 310 become dark or transparent, thereby reducing light transmittance. It plays a role in controlling.

The first electrochromic unit 300 is disposed so that the pair of transparent electrode layers 900 (a) and (b) face each other, and the first electrochromic layer (a) is disposed between the pair of transparent electrode layers 900 (a) and (b). 310 is sandwiched.

The transparent electrode layers 900 (a) and (b) are electrically conductive layers that can be attached to the first glass plate 100 and the second glass plate 200, and between the pair of transparent electrode layers 900 (a) and (b). A predetermined voltage is applied to the first electrochromic layer 310 to cause color development and discoloration of the first electrochromic layer 310.

The transparent electrode layers 900 (a) and (b) refer to a conductive layer made of a transparent conductive metal oxide (TCO), which is a transparent and electrically conductive material, and preferably has excellent light transmittance. As described above, the front and rear surfaces of the first electrochromic layer 310 are formed to face each other.

More specifically, the transparent electrode layers 900 (a) and (b) may be provided with metal oxides that are gold (Au), silver (Ag), copper (Cu), platinum (Pt), aluminum (Al), or mixtures thereof. With tin-doped indium tin oxide (ITO), tin oxide (NESA), fluorine-doped tin oxide (FTO), zinc oxide (ZnO), aluminum-doped zinc oxide (ZnO: Al). Can be prepared.

The thickness of the transparent electrode layers 900 (a) and (b) can be variously adjusted according to the intended use of the smart window and does not affect light transmission interference, but is preferably provided within the range of 0.01 μm to 100 μm, It is not limited to this.

In addition, the transparent electrode layers 900 (a) and (b) are disposed between the first electrochromic unit 300 and the second electrochromic unit 400 and the second electrochromic unit 400 and the third electrochromic. The number of electrode layers may be reduced by using the transparent electrode layers 900 (a) and (b) as common electrodes between the mix units 500.

In this case, the transparent electrode layers 900 (a) and (b) are connected to the power supply unit 700 and the lead wire 30.

The first pattern shape 350 includes a rectangle, a rectangle, a square, a trapezoid, a triangle, a rhombus, a parallelogram, a circle, an ellipse, or a polygon thereof, or a polygon thereof.

In addition, the first pattern shape 350 may include a single pattern or a plurality of single patterns.

Referring to FIG. 2A as an embodiment of the present invention, the first pattern shape 350 is formed of a plurality of concentric circles.

On the other hand, the transparent region 50 refers to a region where color development and discoloration of the first electrochromic layer 310 do not occur when the voltage is applied to the first electrochromic unit 300.

That is, the transparent region 50 is a region in which light transmittance does not change according to voltage application, and is always present in a transparent state so that sunlight can be transmitted as it is.

The transparent region 50 inserts a transparent thin film (partitioner) into the boundary portion of the first pattern shape 350 of the first electrochromic layer 310 so that the electrochromic material is introduced into the first pattern shape 350. It can be implemented by blocking the penetration, and also provided the area of the first pattern shape 350 of the first electrochromic layer 310 as a transparent insulator, so that the color of the first electrochromic layer 310 is not applied to a predetermined voltage. A transparent area 50 where no color fading can be implemented.

When a voltage is applied between the pair of transparent electrode layers 900 (a) and (b), the first electrochromic layer 310 may be reversibly colored and discolored by electrochemical oxidation and reduction, thereby controlling light transmittance. It contains an electrochromic material.

The first electrochromic layer 310 may further include an electrolyte layer (not shown) capable of conducting ions or electrons.

At this time, the electrochromic material does not have a color when the electric field is not applied from the outside and is colored when the electric field is applied. On the contrary, the electrochromic material has a color when the electric field is not applied from the outside and discolors when the electric field is applied. Contains substances.

For example, the electrochromic materials include inorganic compounds such as tungsten oxide and molybdenum oxide, pyridine compounds, aminoquinone compounds, and the like. Examples of anode coloration materials include chromium oxide (Cr 2 O 3) and oxidation. Nickel (NiOx), iridium oxide (IrO2), manganese oxide (MnO2), iron hexacyano iron (II) oxide (III) (Fe4 [Fe (CN) 6] 3), nickel hydroxide (Ni (OH) 2), etc. Transition metal oxides, and examples of cathodic coloration materials include transition metals such as tungsten oxide (WO 3), molybdenum oxide (MoO 3), niobium oxide (Nb 2 O 3), titanium oxide (TiO 2), and strontium titanate (SrTiO 3). There is an oxide.

In addition, examples of the electrochromic substance include low molecular organic electrochromic compounds such as azobenzene, triphenylamine, and phenylene diamine, or π-conjugated systems such as polyacetylene, polyaniline, polyp-phenylene sulfide, and polyphenylnaphthalene. Conductive polymers can be used.

In this case, the electrochromic materials may be used alone or in combination.

The second electrochromic unit 400 includes a second electrochromic layer 410 having the transparent region 50 of the second pattern shape 450.

As the voltage is applied, the second electrochromic unit 400 makes the remaining light except for the transparent region 50 of the second pattern shape 450 provided in the second electrochromic layer 410 darkened or transparent, thereby reducing the light transmittance. It plays a role in controlling.

The pair of transparent electrode layers 900 (a) and (b) of the second electrochromic unit 400 are disposed to face each other, and the second electrochromic layer 410 is disposed between the pair of transparent electrode layers 900 (a) and (b). ) Is sandwiched.

The electrochromic material of the transparent electrode layers 900 (a) and (b), the second pattern shape 450, the transparent region 50, and the second electrochromic layer 410 may be formed of the first electrochromic unit ( Since it is the same as that described in (300), only the differences from the first electrochromic unit 300 will be described herein.

The second pattern shape 450 includes a rectangle, a rectangle, a square, a trapezoid, a triangle, a rhombus, a parallelogram, a circle, an ellipse, or a portion thereof or a polygon overlapping the second pattern shape 450. It may be formed to include or a plurality of the single pattern is disposed.

Meanwhile, the sizes of the transparent regions 50 of the first pattern shape 350 and the second pattern shape 450 are different, and the transparent regions 50 of the first pattern shape 350 and the second pattern shape 450 are different. There is an intersection area 60 intersecting with each other.

More specifically, referring to FIGS. 2A and 2B, the sizes of the transparent regions 50 of the first pattern shape 350 and the second pattern shape 450 are different from concentric circles and quadrangles, respectively. Referring to d), there is an intersection area 60 in which the transparent region 50 of the first pattern shape 350 and the second pattern shape 450 intersect each other.

The third electrochromic unit 500 does not have a transparent region 50 and includes a third electrochromic layer 510.

The third electrochromic unit 500 adjusts the light transmittance by simultaneously darkening or making the entire area of the third electrochromic layer 510 according to the voltage application.

The third electrochromic unit 500 is disposed so that a pair of transparent electrode layers 900 (a) and (b) face each other, and a third electrochromic layer (B) between the pair of transparent electrode layers 900 (a) and (b). 510 is sandwiched.

Since the transparent electrode layers 900 (a) and (b) and the electrochromic material of the third electrochromic unit 500 are the same as those described in the first electrochromic unit 300, they will be omitted here.

In this case, the first electrochromic layer 310, the second electrochromic layer 410, and the third electrochromic layer 510 may have individual colors.

For example, the first electrochromic layer 310 has an electrochromic material of red color (R) when voltage is applied, and the second electrochromic layer 410 is green (G) when voltage is applied. It has a chromic material, and the third electrochromic layer 510 may have an electrochromic material having a blue color (B) when a voltage is applied.

That is, the first electrochromic layer 310 may have red (R), the second electrochromic layer 410 may have green (G), and the third electrochromic layer 510 may have blue (B). This is merely an example of the present invention and is not limited thereto.

Since the smart window using the electrochromic is provided with a plurality of electrochromic units, the interior effect of the colorful window can be obtained by changing the color of the electrochromic material for each electrochromic unit.

In addition, the color of the electrochromic material may be used to block light having a specific wavelength, thereby reducing damage from light having a harmful wavelength such as ultraviolet rays.

The driver 600 includes a control circuit independently connected to the first electrochromic unit 300, the second electrochromic unit 400, and the third electrochromic unit 500 to apply a voltage. A voltage is applied to the first electrochromic unit 300, the second electrochromic unit 400, and the third electrochromic unit 500.

The power supply 700 serves to supply power to the driver 600 to form a voltage (potential difference).

The power supply unit 700 is configured to apply a predetermined voltage, preferably a value within the range of 0.5V to 10V, but is not limited thereto.

If a reverse voltage is applied or no voltage is applied to each electrochromic unit, the color returns to the original transparent state.

To this end, the power supply unit 700 may further include a power cutoff unit (not shown) and a reverse voltage supply unit (not shown).

The controller 800 is electrically connected to the driving unit 600 and the power supply 700 to control the overall operation of the smart window, and also the first electrochromic unit 300, the second electrochromic unit 400, The third electrochromic unit 500 controls the voltage to be applied separately.

That is, the controller 800 may control the first electrochromic unit 300, the second electrochromic unit 400, and the third electrochromic unit 500 to individually or simultaneously color or discolor. Do.

The control unit 800 may transmit light according to color development or discoloration of the first electrochromic unit 300, the second electrochromic unit 400, and the third electrochromic unit 500 of the smart window using the electrochromic. Is controlled in a fifth step.

3 (a) to 3 (e), the first step of light transmittance is the first electrochromic unit 300, the second electrochromic unit 400, and the third electrochromic unit 500. Since no voltage is applied to all of them, all incident solar light is transmitted to transmit sunlight through the entire region of the third electrochromic unit 500 as shown in FIG.

As shown in FIG. 3B, the light transmittance second step is applied with voltage only to the first electrochromic unit 300 and the second electrochromic unit 400 and the third electrochromic unit 500. The silver transmits sunlight only in the transparent region 50 of the first pattern shape 350 of the first electrochromic unit 300 while the voltage is stopped.

In the third light transmittance step, as shown in FIG. 3C, only the second electrochromic unit 400 is applied with a voltage, and the first electrochromic unit 300 and the third electrochromic unit 500 are applied. The silver transmits sunlight only in the transparent region 50 of the second pattern shape 450 of the second electrochromic unit 400 while the voltage is stopped.

As shown in FIG. 3 (d), the light transmittance is performed by applying voltage to the first electrochromic unit 300 and the second electrochromic unit 400, and the third electrochromic unit 500. The transparent region 50 of the first pattern shape 350 of the first electrochromic unit 300 and the second pattern shape 450 of the second electrochromic unit 400 while the silver voltage is stopped. Sunlight is transmitted only in the intersecting regions 60 that cross each other.

As shown in FIG. 3E, the light transmittance fifth step may be performed regardless of whether the voltage of the first electrochromic unit 300 or the second electrochromic unit 400 is applied. In the state in which the voltage is applied to the unit 500, sunlight is blocked in the entire area of the third electrochromic layer 510 having no transparent area.

In other words, the light transmittance decreases as the step increases from the first step to the fifth step.

Therefore, the smart window using the present invention electrochromic can control the light transmittance according to the change in the light transmission area by adjusting the light transmission shape.

In addition, the smart window using the present invention the electrochromic can give the sun light transmission and light blocking effect at the same time, it is possible to reduce the electrical energy due to the use of lighting.

Although the present invention has been fully described by way of example only with reference to the accompanying drawings, it is to be understood that the present invention is not limited thereto. It is to be understood that the scope of the invention is to be construed as being limited only by the following claims and their equivalents.

10: smart window body
30: Lead wire
50: transmission area (TA)
60: intersection area
100: first glass plate
200: second glass plate
300: first electrochromic unit
310: first electrochromic layer
350: first pattern shape
400: second electrochromic unit
410: second electrochromic layer
450: second pattern shape
500: third electrochromic unit
510: third electrochromic layer
600: drive unit
700: Power supply
800:
900 (a) (b): transparent electrode layer

Claims (4)

A first glass plate formed of transparent glass;
A second glass plate positioned to face the first glass plate and provided with transparent glass;
A first electrochromic unit including a first electrochromic layer having a transparent region of a first pattern shape;
A second electrochromic unit including a second electrochromic layer having a transparent region of a second pattern shape;
A third electrochromic unit including a third electrochromic layer having no transparent region;
A driving unit including a control circuit independently connected to the first electrochromic unit, the second electrochromic unit, and the third electrochromic unit to apply a voltage;
A power supply unit supplying power to the driving unit;
A controller configured to control voltages to be individually applied to the first electrochromic unit, the second electrochromic unit, and the third electrochromic unit; Including;
The first electrochromic unit, the second electrochromic unit, and the third electrochromic unit each have a pair of opposing transparent electrode layers,
The control unit,
The light transmission amount is controlled in a fifth step according to the color development or discoloration of the first electrochromic unit, the second electrochromic unit, and the third electrochromic unit,
The first electrochromic layer, the second electrochromic layer, and the third electrochromic layer each have a separate color,
The size of the transparent regions of the first pattern shape and the second pattern shape is different, and the transparent areas of the first pattern shape and the second pattern shape exist to cross each other.
The transparent electrode layer is provided with a conductive layer made of a conductive metal oxide (TCO: Transparent Conductive Oxide),
The transparent electrode layer disposed between the first electrochromic unit and the second electrochromic unit and between the second electrochromic unit and the third electrochromic unit is provided as a common electrode,
The first glass plate and the second glass plate each include a film-like coating layer of a thin film made of a polymer material to compensate for heat resistance, strength, scratch resistance, and UV blocking.
The transparent region may be formed by inserting a transparent thin film on the boundary portion of the first pattern shape or the second pattern shape on the first electrochromic layer or the second electrochromic layer, or the transparent insulator corresponding to the first pattern shape or the second pattern shape. Is implemented by inserting
The controller is provided to block harmful light of a specific wavelength by combining colors of the first to third electrochromic layers.
In the first step of the light transmittance, the first electrochromic unit, the second electrochromic unit, and the third electrochromic unit do not apply a voltage to transmit sunlight in all areas.
In the second step of the light transmittance, a voltage is applied only to the first electrochromic unit and no voltage is applied to the second and third electrochromic units to transmit sunlight only in the transparent region of the first pattern shape.
In the third step of the light transmittance, the voltage is applied only to the second electrochromic unit and the voltage is not applied to the first and third electrochromic units, so that sunlight is transmitted only in the transparent region of the second pattern shape.
In the fourth step of the light transmittance, only a voltage is applied to the first and second electrochromic units and no voltage is applied to the third electrochromic unit, so that the first and second transparent chromatic units have only a crossing region where the transparent regions of the first pattern shape and the second pattern shape cross each other. It is provided to transmit sunlight,
In the fifth step of the light transmittance, a voltage is applied to the third electrochromic unit to block the projected light in all areas.
Smart window using electrochromic.
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