KR101985803B1 - Controlling apparatus for Electrochromic device, Electrochromic module comprising the same and controlling method for Electrochromic device - Google Patents

Controlling apparatus for Electrochromic device, Electrochromic module comprising the same and controlling method for Electrochromic device Download PDF

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KR101985803B1
KR101985803B1 KR1020150173278A KR20150173278A KR101985803B1 KR 101985803 B1 KR101985803 B1 KR 101985803B1 KR 1020150173278 A KR1020150173278 A KR 1020150173278A KR 20150173278 A KR20150173278 A KR 20150173278A KR 101985803 B1 KR101985803 B1 KR 101985803B1
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South Korea
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voltage
electrochromic device
maximum
electrochromic
open circuit
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KR1020150173278A
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Korean (ko)
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KR20170066977A (en
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이동현
송두훈
한재성
이수희
김사라
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주식회사 엘지화학
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    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/15—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on an electrochromic effect
    • G02F1/163—Operation of electrochromic cells, e.g. electrodeposition cells; Circuit arrangements therefor

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  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Electrochromic Elements, Electrophoresis, Or Variable Reflection Or Absorption Elements (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)

Abstract

The present invention relates to a control device for an electrochromic device, an electrochromic module including the electrochromic device, and a control method for the electrochromic device. According to one aspect of the present invention, there is provided a control device for an electrochromic device, And a power supply unit for applying a first maximum voltage having a value between a maximum maximum applied voltage and a maximum maximum applied voltage to the electrochromic device before applying the maximum maximum applied voltage to the electrochromic device, A control device for an electrochromic device including a control section for controlling the electrochromic device is provided.

Description

[0001] The present invention relates to a control apparatus for an electrochromic device, an electrochromic module including the electrochromic device, and a control method for the electrochromic device,

The present invention relates to a control device for an electrochromic device, an electrochromic module including the same, and a control method for the electrochromic device.

Electrochromism is a phenomenon that reversibly changes color when electrochemically oxidizing or reducing the electrode material. A device made of an organic or inorganic electrochromic material can be manufactured as a wide area device at a low cost even though the response speed is slower than that of a conventional cathode ray tube (CRT), a liquid crystal display (LCD), or a light emitting diode (LED) Because it has low power consumption, it can be applied to many fields such as smart window, smart mirror, and electronic paper.

In particular, the development of smart windows / films using electrochromic materials can reduce the emission of fossil fuel emissions through alternative energy utilization, save energy, and contribute to environmental conservation. Therefore, The development of a new concept window that can control the active function such as the effect and the heat transmission can improve the quality of life by improving the residential culture and office environment.

Meanwhile, the smart window type can be divided into a passive type and an active type, and the active type can be classified into three methods according to the driving method: PDLC, SPD / DPS, and EC. Here, the EC method can have an advantage over other methods in terms of the driving method (power consumption, switching time, etc.) and cost.

In general, an electrochromic device (ECD) applies a predetermined voltage value for a predetermined time, thereby realizing coloring / decoloring performance. However, such a constant voltage applying method can reduce the lifetime of the electrochromic device, and in particular, when the coloring and the decoloring are repeated for a short time, the lifetime of the electrochromic device can be further shortened.

Disclosure of Invention Technical Problem [8] Accordingly, the present invention has been made in view of the above problems, and an object of the present invention is to provide a control apparatus for an electrochromic device, which can prevent shortening of the lifetime due to abrupt voltage change, an electrochromic module including the electrochromic device, and a control method for the electrochromic device.

It is another object of the present invention to provide a control apparatus for an electrochromic device capable of minimizing a voltage variation amount upon decolorization, an electrochromic module including the same, and a control method for the electrochromic device.

According to an aspect of the present invention, there is provided an electrochromic device comprising: a power supply unit for applying a voltage to an electrochromic device; And a power supply unit for applying a first maximum voltage having a value between a maximum maximum applied voltage and a maximum maximum applied voltage to the electrochromic device before applying the maximum maximum applied voltage to the electrochromic device, A control device for an electrochromic device including a control section for controlling the electrochromic device is provided.

The first voltage may be determined so that the difference between the maximum applied voltage and the first voltage is smaller than the difference between the maximum decoloring applied voltage and the first voltage.

In addition, the controller may apply the first voltage for a time shorter than the application time of the maximum color application voltage.

In addition, the control unit can sequentially generate decolorization of the electrochromic device at least twice.

Also, the first voltage may be -3V to 0.5V.

According to another aspect of the present invention, there is provided an electrochromic device comprising: a power supply unit for applying a voltage to an electrochromic device; A measuring unit for measuring an open circuit voltage of the electrochromic device; And a first voltage having a value between a maximum color fading voltage and a maximum color fading voltage is applied to the electrochromic device before the application of the maximum color fading voltage, And a control section for controlling the power supply section so as to be applied to the color changing element at least once.

According to still another aspect of the present invention, there is provided an electrochromic device comprising: an electrochromic device provided to be colored or discolored according to an applied driving voltage; A power supply unit for applying a voltage to the electrochromic device; And a power supply unit for applying a first maximum voltage having a value between a maximum maximum applied voltage and a maximum maximum applied voltage to the electrochromic device before applying the maximum maximum applied voltage to the electrochromic device, An electrochromic module including a control unit for controlling the electrochromic module.

According to still another aspect of the present invention, there is provided an electrochromic device comprising: an electrochromic device provided to be colored or discolored according to an applied driving voltage; A power supply unit for applying a voltage to the electrochromic device; A measuring unit for measuring an open circuit voltage of the electrochromic device; And a first voltage having a value between a maximum color fading voltage and a maximum color fading voltage is applied to the electrochromic device before the application of the maximum color fading voltage, And a control section for controlling the power supply section to apply at least once to the color changing element.

According to still another aspect of the present invention, there is provided a method of manufacturing an electrochromic device, comprising: applying a maximum applied voltage to an electrochromic device; Blocking the power supply of the electrochromic device so that an open circuit is provided; Applying a first voltage having a value between a maximum applied coloring voltage and a maximum decoloring applied voltage to the electrochromic device at least once; And applying a decolorizing maximum applied voltage to the electrochromic device.

As described above, according to the electrochromic device control device, the electrochromic module and the electrochromic device control method according to at least one embodiment of the present invention, it is possible to minimize the amount of voltage change at the time of coloring and discoloration And the lifetime of the electrochromic device can be increased.

1 is a cross-sectional view showing an electrochromic device related to the present invention.
2 is a configuration diagram showing a control device for an electrochromic device according to an embodiment of the present invention.
FIGS. 3 and 4 are graphs showing the voltage change of the electrochromic device in the coloring and decoloring process. FIG.
5 is a graph showing driving characteristics of an electrochromic device according to an embodiment of the present invention.
6 is a graph showing driving characteristics of a conventional electrochromic device.

Hereinafter, a control apparatus for an electrochromic device according to an embodiment of the present invention, an electrochromic module including the same, and a control method for the electrochromic device will be described in detail with reference to the accompanying drawings.

In addition, the same or corresponding reference numerals are given to the same or corresponding reference numerals regardless of the reference numerals, and redundant description thereof will be omitted. For convenience of explanation, the size and shape of each constituent member shown in the drawings are exaggerated or reduced .

Fig. 1 is a cross-sectional view showing an electrochromic device 100 according to the present invention, Fig. 2 is a configuration diagram showing a control device 200 of the electrochromic device 100 according to an embodiment of the present invention, 4 is a graph showing voltage changes of the electrochromic device 100 during the coloring and decoloring process.

In this document, the electrochromic device 100 represents a device that is colored or discolored by an applied driving voltage. In addition, the electrochromic device 100 may have a memory function in which coloring and discoloration are maintained for a predetermined time when a driving voltage is applied.

1, an electrochromic device 100 includes a first electrode 110, an electrochromic layer 120 provided on the first electrode 110, an ion conductor layer 130 provided on the electrochromic layer 130, An ion storage layer 140 provided on the ion conductor layer and a second electrode 150 provided on the ion storage layer 140. [

In the electrochromic device 100, the first electrode 110 may be provided on the first substrate 101, and the second substrate 102 may be provided on the second electrode 150. The first and second substrates 101 and 102 may be formed of glass or resin. The first and second electrodes 110 and 150 and the respective layers 120, 130 and 140 may be disposed between the first substrate 101 and the second substrate 102.

The first electrode 110 and the second electrode 150 may be formed of transparent electrodes such as ITO, OMO, or metal mesh. In addition, the first electrode 110 can supply charge to the electrochromic layer 120. In addition, the electrochromic layer 120 may be formed of an electrochromic material changes color in accordance with electric signals, for example, WO 3, MoO 3 Or the like.

The ion conductor layer 130 may include ions involved in an electrochromic reaction, and the ion conductor layer 130 may include a solid electrolyte. The solid electrolyte may be an inorganic solid electrolyte or a gel-polymer electrolyte (GPE ). Here, the inorganic solid electrolyte may include LiPON or Ta 2 O 5 . Further, the inorganic solid electrolyte may be one in which components such as B, S, and W are partially added to LiPON or Ta 2 O 5 .

In addition, the ion storage layer 140 may function to collect ions having an opposite polarity to ions involved in the electrochromic reaction, and may be formed of LiNiO, NiO, V 2 O 5, or the like. When a voltage is applied to the first electrode 110 and the second electrode 150 and current flows from the ion storage layer 140 to the electrochromic layer 120, The coloring layer 120 is colored, and when a current flows in the opposite direction, the electrochromic layer 120 is discolored.

The electrochromic module 1 according to one embodiment of the present invention includes an electrochromic device 100 that is colored or discolored by an applied driving voltage and a control device 200 (or an electrochromic device) for controlling the electrochromic device Driving device).

In the first embodiment, the controller 200 for an electrochromic device includes a power supply unit 210 for applying a voltage to an electrochromic device, and a controller 300 for applying a maximum coloring application voltage to the electrochromic device, , And a control unit (230) for controlling the power supply unit to apply a first voltage having a value between a maximum color fading voltage and a maximum color fading voltage to the electrochromic device at least once. The power supply unit 210 may be provided to supply a voltage pulse to the electrochromic device 100. Also, the power supply unit 210 is controlled by the controller 230, and the voltage pulse can be specified by the applied voltage (potential) and the applied time.

Referring to FIG. 3, L3 represents a maximum applied coloring voltage, L2 represents a maximum decoloring maximum applied voltage, and L1 represents an open circuit voltage to be described later. 3, the stress at the interface during coloring corresponds to L3, and the stress at the interface during decolorization corresponds to L2 + L3. Alternatively, if the power supply unit 210 cuts off the power supply to the electrochromic device 100 after the maximum applied voltage is applied, an open circuit is formed. Thus, if an open circuit is provided during coloring and discoloration, the stress at the interface at the time of decolorization corresponds to L1 + L2. That is, when an open circuit step is inserted between the coloring and the discoloration conversion, the stress at the interface at the time of discoloration can be reduced, and the lifetime of the electrochromic device 100 can be increased. On the other hand, the voltage and the transmittance are proportional to each other. When the electrochromic device 100 is discolored, the transmittance may be 85% or more, and when the electrochromic device 100 is colored, the transmittance may be 3% or less.

Referring to FIG. 4, before applying the maximum color application voltage 11 and applying the maximum color application maximum application voltage 13, a first voltage having a value between the maximum color application maximum voltage 11 and the maximum color application maximum application voltage 13, The amount of voltage change at the interface at the time of decolorization can be minimized by applying the electrochromic device 12 to the electrochromic device 100 at least once.

The first voltage 12 may be determined so that the difference between the maximum applied voltage 11 and the first voltage 12 is smaller than the difference between the maximum decoloring applied voltage 13 and the first voltage 12 . Specifically, the first voltage 12 is set such that the absolute value of the difference between the maximum applied voltage 11 and the first voltage 12 is less than the absolute value of the difference between the decolorized maximum applied voltage 13 and the first voltage 12 . ≪ / RTI >

Also, the controller 230 may control the power supply unit 210 to apply the first voltage 12 for a time shorter than the application time of the maximum coloring application voltage 11. The application of the first voltage is an area in which no additional coloring / discoloring reaction occurs in the optical sense, and therefore, the application time of the first voltage may have a meaning of a coloring / discoloring delay time.

In summary, the control unit 230 may control the power supply unit 210 to sequentially generate the discoloration of the electrochromic device 100 at least twice. Accordingly, the highest voltage difference in the entire coloring / discoloring driving is L2 + L3. After the coloring, the first voltage is applied first and the decoloring maximum applied voltage is applied secondarily so that the discoloration of the electrochromic device 100 So that it can be controlled in a sequential manner.

Considering the general electrochromic device 100, the coloring / discoloring maximum voltage may be -3V to 3V, and the first voltage 12 may be -3V to 0V. For example, in the case of the embodiment, the maximum applied voltage 11 may be -2V, the first voltage 12 may be -0.5V, and the maximum decolorization applied voltage 13 may be 2V.

In the second embodiment, the controller 100 of the electrochromic device includes a power supply unit 210 for applying a voltage to the electrochromic device, a measurement unit 220 for measuring an open circuit voltage of the electrochromic device, A first voltage having a value between a maximum color fading voltage and a maximum color fading voltage is applied to the electrochromic device before application of a maximum color fading voltage, And a control unit 230 for controlling the power supply unit to apply at least one time.

As described above with reference to FIG. 3, when an open circuit step is inserted between the coloring and the discoloration conversion, the stress at the interface at the time of decolorization can be reduced, and the lifetime of the electrochromic device 100 can be increased. In summary, the second embodiment differs from the first embodiment in that an open circuit is inserted.

At this time, the controller 230 measures the voltage of the electrochromic device 100 through the measuring unit 220 during the open circuit. When the voltage decreases and then converges to a predetermined value (in this document, Referred to as an open circuit voltage), and thereafter, the first voltage 12 is applied. That is, the first voltage 12 is applied after the end of the open circuit.

The first voltage 12 may be determined so that the difference between the maximum applied voltage 11 and the first voltage 12 is smaller than the difference between the maximum decoloring applied voltage 13 and the first voltage, 230 may control the power supply 210 to apply the first voltage 12 for a time shorter than the application time of the maximum color application voltage 11 and the first voltage 12 may control the open circuit voltage, And the maximum applied voltage (13).

5 is a graph showing driving characteristics of an electrochromic device according to an embodiment of the present invention, and FIG. 6 is a graph showing driving characteristics of a conventional electrochromic device.

Referring to FIG. 5, an open circuit is provided after application of a maximum color application voltage to the electrochromic device, a first voltage is applied at the end of the open circuit, and then a decoloring maximum application voltage is applied. The control unit 230 controls the power supply unit 201 to apply such a series of voltage pulses.

Referring to FIG. 5, FIG. 5 shows a case in which a step of decreasing a high potential difference applied to the electrochromic device by applying a first additional voltage between colors / discoloration according to the present invention is added. In the case of FIG. 5 (b), it can be seen that the maximum current value that reacts at one time voltage according to time is maintained without a large change, and it can be confirmed that the electrochromic device is driven stably.

Referring to FIG. 6, FIG. 6 shows a case where a rectangular pulse is applied to the electrochromic device after the application of the maximum color application voltage and the application of the maximum color application time. That is, in the case of FIG. 6, it can be seen that the maximum current value that reacts at a constant voltage with time in the driving method of a general electrochromic device sharply decreases.

5 and 6, the stability of the electrochromic device with respect to time can be confirmed to be improved as compared with the result of FIG. 6 in FIG.

Hereinafter, a control method of the electrochromic device using the controller 200 and the electrochromic module 1 having the above structure will be described in detail.

The control method includes the steps of applying a maximum applied voltage to the electrochromic device and interrupting power supply to the electrochromic device so as to provide an open circuit, and applying a first voltage having a value between the maximum colored application voltage and the maximum decolored application voltage To the electrochromic device at least once, and applying a decolorization maximum applied voltage.

The first voltage is determined so that the difference between the maximum applied voltage and the first voltage is smaller than the difference between the maximum decolorization applied voltage and the first voltage and the first voltage is a value between the open circuit voltage and the maximum decoloring maximum applied voltage Lt; / RTI >

When the first voltage is applied, the first voltage may be applied for a time shorter than the application time of the maximum applied voltage.

The foregoing description of the preferred embodiments of the present invention has been presented for purposes of illustration and various modifications, additions and substitutions are possible, without departing from the scope and spirit of the invention, And additions should be considered as falling within the scope of the following claims.

1: electrochromic module
100: electrochromic device
101, 102: substrate
110: first electrode
120: electrochromic layer
130: ion conductor layer
140: ion storage layer
150: second electrode
200: Control device of electrochromic device
210: Power supply
220:
230:

Claims (20)

delete delete delete delete delete A power supply unit for applying a voltage to the electrochromic device;
A measuring unit for measuring an open circuit voltage of the electrochromic device; And
A first voltage having a value between a maximum color fading voltage and a maximum color fading voltage is applied to an electrochromic device before application of a maximum color fading voltage, And a control unit for controlling the power supply unit to apply at least one time to the device,
Wherein the voltage of the electrochromic device is measured through the measuring unit during the open circuit, and the first voltage is applied after the voltage reaches the open circuit voltage. The method according to claim 6,
Wherein the first voltage is determined so that the difference between the maximum applied voltage and the first voltage is smaller than the difference between the maximum decolorization applied voltage and the first voltage. The method according to claim 6,
Wherein the controller applies the first voltage for a time shorter than the application time of the maximum applied color voltage. The method according to claim 6,
Wherein the first voltage has a value between an open circuit voltage and a maximum decoloring maximum applied voltage. delete delete delete delete An electrochromic device adapted to be colored or discolored according to an applied driving voltage;
A power supply unit for applying a voltage to the electrochromic device;
A measuring unit for measuring an open circuit voltage of the electrochromic device; And
A first voltage having a value between a maximum color fading voltage and a maximum color fading voltage is applied to an electrochromic device before application of a maximum color fading voltage, And a control unit for controlling the power supply unit to apply at least one time to the device,
And a first voltage is applied after the voltage of the electrochromic device is measured through the measurement unit and reaches the open circuit voltage. 15. The method of claim 14,
Wherein the first voltage is determined so that the difference between the maximum applied voltage and the first voltage is smaller than the difference between the maximum decolorization applied voltage and the first voltage. 15. The method of claim 14,
Wherein the control unit applies the first voltage for a time shorter than the application time of the maximum applied color voltage. 15. The method of claim 14,
Wherein the first voltage has a value between an open circuit voltage and a maximum decoloring maximum applied voltage. delete delete delete
KR1020150173278A 2015-12-07 2015-12-07 Controlling apparatus for Electrochromic device, Electrochromic module comprising the same and controlling method for Electrochromic device KR101985803B1 (en)

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KR1020150173278A KR101985803B1 (en) 2015-12-07 2015-12-07 Controlling apparatus for Electrochromic device, Electrochromic module comprising the same and controlling method for Electrochromic device

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000142223A (en) * 1998-11-12 2000-05-23 Murakami Corp Driving device of ec panel for rearview mirror
JP2002229072A (en) * 2001-02-01 2002-08-14 Asahi Glass Co Ltd Method and unit for controlling electrochromic light control element

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000142223A (en) * 1998-11-12 2000-05-23 Murakami Corp Driving device of ec panel for rearview mirror
JP2002229072A (en) * 2001-02-01 2002-08-14 Asahi Glass Co Ltd Method and unit for controlling electrochromic light control element

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