RU2774282C1 - Electric voltage-gated dimming screen with increased roll strength, methods for manufacture thereof and method for operation thereof - Google Patents

Abstract

FIELD: electrical engineering.

SUBSTANCE: some examples of implementation relate to electric voltage-gated dimming screens used with insulating glass units, to insulating glass units including such dimming screens, and/or associated methods. In such an insulating glass unit, a dynamically controlled dimming screen is placed between two substrates forming the insulating glass unit, configured to be moved between the retracted and extended positions. The dynamic dimming screen includes layers applied to the glass, including a transparent conductor and an insulating or dielectric film, as well as a curtain. The curtain includes an elastic polymer, a conductor and, optionally, paint. Holes invisible to the naked eye can be made in the polymer. Said holes can have a size, shape and location contributing to the reflection of solar energy during the summer and the transmission of solar energy during the winter. The conductor can be transparent or opaque. If the conductor is reflective, external layers can be provided in order to reduce internal reflection. The polymer can sustain high temperature conditions and, in certain cases, be painted.

EFFECT: creation of an insulating glass unit equipped with an electric voltage-gated dimming screen.

21 cl, 24 dwg

Description

FIELD OF TECHNOLOGY

[0001] Some embodiments of the present invention relate to blackout screens that can be used with insulating glass units, insulating glass units containing such darkening screens, and/or methods for their manufacture. More specifically, some embodiments of the present invention relate to electrically controlled dimming screens that can be used with insulating glass units, to insulating glass units containing such darkening screens, and/or methods for their manufacture.

BACKGROUND OF THE INVENTION AND SUMMARY OF THE INVENTION

[0002] The construction industry is known for its high energy consumption, which has been shown to be 30-40% of the world's primary energy consumption. Most of this energy consumption is associated with operating costs such as heating, air conditioning, ventilation and lighting, especially in older buildings built to less stringent energy efficiency standards.

[0003] For example, windows provide natural light, fresh air, access and communication with the outside world. However, they often also represent a significant source of energy loss. With the increasing use of windows in architecture, it is becoming increasingly important to balance the conflicting interests of energy efficiency and human comfort. In addition, global warming and carbon emissions issues contribute to the need for new energy efficient glazing systems.

[0004] In this regard, since windows are usually the “weakest link” in a building’s insulation, and given modern architectural designs that often include entire facades of glass, it becomes obvious that windows with improved insulation would be useful from the point of view of view of control and reduction of energy costs. Thus, the development of windows with a high degree of insulation offers significant advantages both from an environmental and economic point of view.

[0005] IGUs have been developed to provide improved insulation for buildings and other structures, and FIG. 1 is a schematic cross-sectional view of an example of an insulating glass unit. In the shown in FIG. 1 example of an insulating glass unit, the first and second substrates 102 and 104 are substantially parallel and spaced apart from each other. A spacer system 106 is provided around the periphery of the first and second substrates 102 and 104 to help keep them substantially parallel and spaced apart and to help define a gap or space 108 between them. In some cases, the gap 108 may be at least partially filled with an inert gas (such as, for example, Ar, Kr, Xe, and/or the like) to improve the insulating properties of the entire glass unit. In some cases, optional external seals may be provided in addition to the separation system 106.

[0006] Windows are unique elements in most buildings in that they are able to "supply" energy to the building in the form of heat gain from solar radiation in winter and daylight throughout the year. However, current window technology tends to lead to excessive costs for heating in winter, cooling in summer, and often fails to take advantage of daylight, which would dim or turn off lights for most commercial customers in the state.

[0007] One promising way to improve the performance of windows is thin film technology. Thin films can, for example, be applied directly to glass during production, to a polymer sheet that can retrofit an existing window at a correspondingly lower cost, etc. And over the past two decades, progress has been made primarily by reducing the heat transfer coefficient (U -values) of windows through the use of static or "passive" low emissivity coatings (low emissivity coatings) and by reducing solar heat gain (SHGC) through the use of spectrally selective low emissivity coatings. Low emissivity coatings, for example, can be used in combination with insulating glass units, such as, for example, shown and described with reference to FIG. 1. However, further improvements are still possible.

[0008] For example, it should be understood that it would be desirable to provide a more dynamic version of an insulating glass unit that takes into account the desire to provide improved insulation of buildings, etc., takes advantage of the ability of the sun to "supply" energy to the interior of buildings, and also provides privacy, more in line with the “on demand” principle. It should be understood that it would also be desirable for such articles to have a pleasing and aesthetic appearance.

[0009] Some embodiments address these and/or other problems. For example, some embodiments of the present invention relate to electrically controlled dimming screens that can be used with insulating glass units, to insulating glass units containing such darkening screens, and/or methods for their manufacture.

[0010] In some embodiments of the invention, an insulating glass unit is provided. Each of the first and second substrates has inner and outer major surfaces, wherein the inner major surface of the first substrate faces the inner major surface of the second substrate. The separating system helps to keep the first and second substrates substantially parallel and spaced apart from each other and forms a gap between them. Between the first and second substrates is a dynamically controlled dimming screen, and dimming screen includes: the first conductive film located directly or indirectly on the inner main surface of the first substrate; a dielectric or insulating film located directly or indirectly on the first conductive film; and a shutter including a polymeric material holding the second conductive film, wherein the polymeric material is configured to extend to perform the function of the closed position of the shutter and retract to perform the function of the open position of the shutter, and the shutter further includes a plurality of holes passing through at least a part of the polymeric material, the apertures being invisible to the naked eye and sized, shaped, and positioned to form a passive shading element that provides gradual shading from sunlight when the polymeric material is pulled to the closed position of the shade. The first and second conductive films are electrically connected to a power source, which is configured to control it to selectively set an electrical potential difference to appropriately transfer the polymer material between the open and closed positions of the shutter.

[0011] In some embodiments, a method for manufacturing an insulating glass unit is provided. The method includes providing first and second substrates, each having inner and outer major surfaces; obtaining a first conductive film directly or indirectly on the inner main surface of the first substrate; obtaining a dielectric or insulating film directly or indirectly on the first conductive film; placement adjacent to a dielectric or insulating film of a shutter comprising a polymeric material holding a second conductive film, wherein the polymeric material is configured to be pulled out when used to perform the function of the closed position of the shutter and retracted to perform the function of the open position of the shutter, and the shutter further includes a plurality of holes passing through at least a portion of the polymer material, and holes in the glass unit are not visible to the naked eye and have a size, shape and location, allowing to form a passive shading element, providing for the glass unit smooth darkening from sunlight when the polymer material is pulled to the closed position of the shutter; electrically connecting the first and second conductive films to the power supply, wherein the first conductive film, the dielectric or insulating film, and the shutter at least partially form a dynamic dimming screen capable of being controlled by the power supply to selectively set the electrical potential difference and, accordingly, transfer of polymeric material between the open and closed positions of the shutter; and connecting the first and second substrates to each other essentially in parallel and at some distance from each other using a separation system in such a way that the inner surfaces of the first and second substrates face each other in the manufacture of an insulating glass unit, and a gap is formed between them, while dynamic the dimming screen is located between the first and second substrates in the gap.

[0012] In some embodiments, a method for manufacturing an insulating glass unit is provided. The method includes the presence of first and second substrates, each having an inner and outer major surfaces, with the inner major surface of the first substrate facing the inner major surface of the second substrate. The first conductive film is formed directly or indirectly on the inner main surface of the first substrate, and a dielectric or insulating film is placed directly or indirectly on the first conductive film. The shutter is placed adjacent to the dielectric or insulating film, the shutter including a polymeric material holding the second conductive film, the polymeric material being retractable when used to perform the function of the closed position of the shutter and retracting to perform the function of the open position of the shutter, and the shutter further includes a plurality of apertures extending through at least a portion of the polymeric material, wherein the apertures in the insulating glass unit are not visible to the naked eye and are sized, shaped, and positioned to form a passive shading element that provides the insulating glass unit with smooth darkening from sunlight when the polymeric material is pulled into shutter closed position. The first and second conductive films are configured to be electrically connected to a power source, wherein the first conductive film, the dielectric or insulating film, and the shutter at least partially form a dynamic dimming screen capable of being controlled by the power source to selectively set an electrical potential difference and , respectively, the transfer of the polymer material between the open and closed positions of the shutter. The method further includes connecting the first and second substrates to each other essentially in parallel and at some distance from each other using a separation system in such a way that the inner surfaces of the first and second substrates face each other during the manufacture of the insulating glass unit, and a gap is formed between them, with In this dynamic dimming screen is located between the first and second substrates in the gap.

[0013] In some embodiments, a method for operating a dynamic dimming screen in an insulating glass unit is provided. The method includes obtaining an insulating glass unit made in accordance with the techniques described herein, and selectively activating a power source to move the polymeric material between the open and closed positions of the shutter.

[0014] The elements, aspects, advantages, and exemplary embodiments described herein may be combined to implement additional embodiments.

BRIEF DESCRIPTION OF GRAPHICS

[0015] These and other elements and advantages may be better and more fully understood with reference to the following detailed description of exemplary embodiments in conjunction with the drawings, wherein:

[0016] in FIG. 1 is a schematic cross-sectional view of an example of an insulating glass unit;

[0017] in FIG. 2 is a schematic cross-sectional view of an example of an insulating glass unit including electrical voltage-controlled blackout screens that can be used in conjunction with some embodiments;

[0018] in FIG. 3 is a cross-sectional view showing examples of the "on-glass" components from the example of an insulating glass unit shown in FIG. 2, providing for the operation of the shutter in accordance with some embodiments;

[0019] in FIG. 4 is a cross-sectional view of an example of a shutter from the example of an insulating glass unit shown in FIG. 2, in accordance with some embodiments;

[0020] in FIG. 5 is a schematic cross-sectional view of an example of an insulating glass unit incorporating an electrically controlled, perforated, voltage-controlled shading screen that can be used in conjunction with some embodiments;

[0021] in FIG. 6A-6b with reference to the example of the insulating glass unit shown in FIG. 5 shows how solar radiation can be selectively reflected in some cases;

[0022] in FIG. 7 is a cross-sectional view showing an alternate geometry of the perforations made in the example of the blackout screen shown in FIG. 5, in accordance with some embodiments;

[0023] in FIG. 8a-8c are cross-sectional views of shutters similar to the example shown in FIG. 3, except that external coatings are used to enhance the aesthetic appearance of the entire blackout screen, in accordance with some embodiments;

[0024] in FIG. 9-11 are plots of percent reflectance versus wavelength for some examples of overcoat materials that can be used in combination with the layer stacks shown in FIG. 8a-8b, in some embodiments;

[0025] in FIG. 12 is a graph showing the effect of temperature on Young's modulus;

[0026] in FIG. 13 shows typical stress relaxation curves for polyethylene terephthalate (PET) film at various temperatures;

[0027] in FIG. 14 is a summary of the main limitations of the dimming screen features that may appear in some embodiments;

[0028] in FIG. 15 is a table including roll strength characteristics for several materials that may be relevant in some embodiments;

[0029] in FIG. 16 is a schematic view of a shutter incorporating a copper indium gallium selenide (CIGS) solar cell that can be used in conjunction with some embodiments;

[0030] in FIG. 17-19 show how a dimming screen can be connected to the glazing and supplied with power in accordance with some embodiments;

[0031] in FIG. 20 is a schematic diagram showing an alternative approach to connecting a shading screen to a glazing and to supplying power, in accordance with some embodiments; and

[0032] in FIG. 21 is a circuit diagram showing yet another alternative approach to connecting a shading screen to a glazing and to supplying power, in accordance with some embodiments.

DETAILED DESCRIPTION

[0033] Some embodiments of the present invention relate to electrically controlled dimming screens that can be used with insulating glass units, to insulating glass units containing such darkening screens, and/or methods for their manufacture. Referring to the accompanying drawings, FIG. 2 is a schematic cross-sectional view of an example of an insulating glass unit incorporating electrical voltage-controlled shading screens that may be used in conjunction with some embodiments. More specifically, FIG. 2 is similar to FIG. 1 in that the first and second substantially parallel and spaced apart glass substrates 102 and 104 are separated from each other by a separation system 106 and a gap 108 is formed therebetween. gap 108 near the inner major surfaces of the first and second substrates 102 and 104, respectively. As will become clear from the description below, the shading screens 202a and 202b are controlled by creating an electric potential difference between the shading screens 202a and 202b and the conductive coatings formed on the inner surfaces of the substrates 102 and 104. As will also become clear from the description below, each of the shading shields 202a and 202b can be formed using a polymer film coated with a conductive coating (eg, a coating containing a layer including Al, Cr, indium tin oxide (ITO), and/or the like). An aluminum coated dimming screen can provide partial or total reflection from visible light to a significant portion of all solar energy.

[0034] The obscuring screens 202a and 202b are normally retracted (e.g., rolled up), but they are rapidly extended (e.g., unrolled) when an appropriate voltage is applied to cover at least a portion of the substrates 102 and 104 in analogy to, for example, "traditional" window blinds. The rolled dimming screen may have a very small diameter, typically much smaller than the width of the gap 108 between the first and second substrates 102 and 104, so that it can function between them and be substantially hidden from view when rolled up. The deployed blackout screens 202a and 202b are firmly attached to adjacent substrates 102 and 104.

[0035] The shading screens 202a and 202b extend from the retracted to the extended configuration along the entire vertical length of the visible or framed area of the substrates 102 and 104 or part thereof. In the retracted configuration, the blackout screens 202a and 202b have a first surface area that substantially allows radiation to pass through the framed area. In the extended configuration, the blackout shields 202a and 202b have a second surface area that substantially controls the passage of radiation through the framed area. In some embodiments, the blackout screens 202a and 202b may have a width that spans all or part of the horizontal width of the framed area of the substrates 102 and 104 to which they are attached.

[0036] Each of the dimming screens 202a and 202b is located between the first and second substrates 102 and 104, and each is preferably attached at one end to the inner surface of the substrates (or to the dielectric or other layer located thereon) near their upper parts. An adhesive layer can be used for this. Blackout screens 202 and 204 are shown in FIG. 2 partially deployed (partially extended). In some embodiments, the shading screens 202a and 202b and any adhesive layer or other fastening structure are preferably hidden from view so that the shading screens 202a and 202b are only visible when at least partially unfolded.

[0037] The diameter of a fully rolled-up blackout screen is preferably about 1-5 mm, but may be greater than 5 mm in some embodiments. Preferably, the diameter of the rolled-up shading screen does not exceed the width of the gap 108, which is typically about 10-15 mm, which facilitates fast and repetitive unfolding and retracting operations. Although in the example of FIG. 2 shows two shading screens 202a and 202b, it should be understood that in some embodiments only one shading screen may be provided, and it should also be understood that one shading screen may be provided on the inner surface of either the inner or outer substrate 102 or 104. In exemplary embodiments with two blackout screens, their total diameter preferably does not exceed the width of the gap 108, for example, to facilitate the deployment and retraction of both blackout screens.

[0038] An electronic controller may be provided to assist in controlling the dimming screens 202a and 202b. The electronic controller may be electrically connected to the blackout screens 202a and 202b as well as to the substrates 102 and 104, for example by means of suitable wires or the like. The wires may be hidden from view through the assembled insulating glass unit. The electronic controller is configured to supply an output voltage to the dimming screens 202a and 202b. In some embodiments, an output voltage in the range of about 100-500 VDC may be used to drive the blackout screens 202a and 202b. For this, an external AC or DC power supply, a DC battery, and/or the like can be used. It should be understood that more or less output voltage may be provided, for example, depending on the manufacturing parameters and materials that make up the blackout screens 202a and 202b, layers on substrates 102 and 104, etc.

[0039] The controller may be connected to a hand switch, remote (eg, wireless) control, or other input device, for example, to indicate whether to retract or extend the blackout screens 202a and 202b. In some embodiments, the electronic controller may include a processor operatively coupled to a memory that stores instructions for receiving and decoding control signals, which in turn cause selective application of voltage to control the extension and/or retraction of the obscuring screens 202a and 202b. Additional commands may be provided to implement other functionality. For example, a timer may be set so that the shade screens 202a and 202b can be programmed to extend and retract at user-specified or other times, a temperature sensor may be provided so that the shade screens 202a and 202b can be programmed to extend and retract when user-specified indoor and/or outdoor temperatures, light sensors may be provided so that the blackout screens 202a and 202b can be programmed to extend and retract depending on the ambient light outside the facility, etc.

[0040] Although in FIG. 2 shows two blackout screens 202a and 202b, as noted above, some embodiments may include only one blackout screen. Additionally, as noted above, such blackout screens can be configured to extend vertically and horizontally along and substantially through the entire insulating glass unit, and in other embodiments, blackout screens can be used that cover only portions of the insulating glass units in which they are located. In such cases, multiple blackout screens may be provided to provide more selective coverage to suit internal or external structures such as slats, or to simulate green space curtains, etc.

[0041] In some embodiments, a locking stopper may be located at the bottom of an insulating glass unit, such as along its width, to prevent the blackout screens from unfolding to their full length. The blocking stopper may be made of a conductive material such as metal or the like. The blocking stopper may also be coated with a low scatter polymer such as, for example, polypropylene, fluorinated ethylene propylene (FEP), polytetrafluoroethylene (PTFE) and/or t . P.

[0042] Examples of the details of operation of the blackout screens 202a and 202b with respect to FIG. 3-4 will not be presented. More specifically, in FIG. 3 is a cross-sectional view showing examples of the "on-glass" components from the example of an insulating glass unit shown in FIG. 2, providing for the operation of the shutter in accordance with some embodiments; and in FIG. 4 is a cross-sectional view of an example of a shutter from the example of an insulating glass unit shown in FIG. 2, in accordance with some embodiments. On FIG. 3 shows a glass substrate 302 that can be used as one or both of the substrates 102 and 104 shown in FIG. 2. The glass substrate 302 is provided with glass-applied components 304 as well as a shutter 312. In some embodiments, when deployed, conductor 404 may be closer to substrate 302 than paint layer 406 is. In other embodiments, the design may be reversed such that, for example, in the unfolded state, the conductor 404 may be farther away from the substrate 302 than the ink layer 406.

[0043] The glass-applied components 304 include a transparent conductor 306 along with a dielectric material 308 that can be attached to the substrate 302 with a low haze transparent adhesive 310 or the like. These materials are preferably substantially transparent. In some embodiments, the transparent conductor 306 is electrically connected by a terminal to a wire leading to the controller. In some embodiments, the transparent conductor 306 serves as the fixed electrode of the capacitor and the dielectric material 308 serves as the capacitor's dielectric.

[0044] The transparent conductor 306 may be formed from any suitable material, such as, for example, ITO, tin oxide (eg, SnO ₂ or other suitable stoichiometric composition), etc. In some embodiments, the transparent conductor 306 may have a thickness 10-500 nm. In some embodiments, the dielectric material 308 may be a low dissipation polymer. Suitable materials include, for example, polypropylene, FEP, PTFE, polyethylene terephthalate (PET), polyimide (PI), and polyethylene naphthalate (PEN), etc. In some embodiments, the dielectric material 308 may have a thickness of 4-25 microns. The thickness of the dielectric material 308 can be chosen to balance the reliability of the dimming shield and the magnitude of the voltage (for example, because thinner dielectric layers tend to reduce reliability, while thicker dielectric layers tend to require high voltage to be applied).

[0045] Many low-e coatings are known to be conductive. Thus, in some embodiments, a low-e coating may be used in place of the transparent conductor 306. The low emissivity coating may be a silver based low emissivity coating, such as one in which one, two, three or more Ag containing layers may be interposed between the dielectric layers. In such cases, the need for adhesive 310 can be reduced or eliminated entirely.

[0046] Shutter 312 may include an elastic layer 402. In some embodiments, conductor 404 may be on one side of elastic layer 402 and decorative paint 406 may optionally be applied to the other side. In some embodiments, conductor 404 may be transparent, and decorative paint 406 is optional as shown. In some embodiments, conductor 404 and/or decorative paint 406 may be translucent or otherwise impart color or aesthetic qualities to curtain 312. In some embodiments, the elastic layer 402 may be formed from a heat shrinkable polymer such as, for example, PEN, PET, polyphenylene sulfide (PPS), polyetheretherketone (PEEK), etc. In some embodiments, the elastic layer 402 may have a thickness of 1-25 µm. In other embodiments, conductor 404 may be made from the same material as conductor 306, or from a different material. You can use, for example, materials based on metal or metal oxide. In some embodiments, a material 10-50 nm thick may be used, including a layer containing, for example, ITO, Al, Ni, NiCr, tin oxide, and/or the like. In some embodiments, the resistance of conductor 404 may be in the range 40-200 Ohm/square.

[0047] Decorative paint 406 may include pigments, particles, and/or other materials that selectively reflect and/or absorb visible colors and/or infrared radiation.

[0048] As shown in FIG. 2, obscuring screens 202a and 202b are typically wound into helical rolls with the outer end of the helix adhesively attached to substrates 102 and 104 (or, for example, to the dielectric on them). Conductor 404 may be electrically connected via a wire terminal or the like, and may serve as a variable capacitor electrode in which conductor 306 serves as the fixed electrode and dielectric 308 as the corresponding dielectric.

[0049] When a motor is provided between the adjustable electrode and the fixed electrode, for example, when a voltage or current is applied between the conductor 404 of the shutter 312 and the conductor 306 on the substrate 302, the shutter 312 is attracted to the substrate 302 due to the electrostatic force generated by the potential difference between the two electrodes. Pulling on the adjustable electrode causes the twisted blackout screen to unwind. An electrostatic force acting on the adjustable electrode causes the shutter 312 to be securely held on the fixed electrode of the substrate 302. As a result, the ink overlay 406 on the dimming screen selectively reflects or absorbs certain visible colors and/or infrared radiation. Thus, the deployed shading screen helps to control the transmission of radiation by selectively blocking and/or reflecting certain light or other radiation, preventing it from passing through the insulating glass unit and thus changing the overall mode of operation of the insulating glass unit from transmissive to partially or selectively transmissive, or even in some cases on opaque.

[0050] When the actuator is removed from the adjustable electrode and the fixed electrode, the electrostatic force acting on the adjustable electrode similarly disappears. The modulus of elasticity present in the elastic layer 402 and conductor 404 causes the shading screen to return to its original, tightly wound position. Since the movement of the shading screen is controlled primarily by the capacitive circuit, current essentially only flows while the shading screen is either unfolding or retracting. As a result, the average power consumption of the dimming screen is extremely low. Thus, a few standard AA batteries can keep a dimming screen running for several years, at least in some cases.

[0051] In one example, the substrate 302 may be 3 mm thick clear glass available from the patentee. As the adhesive layer 310, a low haze acrylic adhesive can be used. The conductor 306 can be a sputtered ITO with a resistance of 100-300 ohms/square. The polymer film may be a low haze (eg < 1% haze) PET material with a thickness of 12 µm. As the decorative paint 406, a PVC-based paint manufactured by Sun Chemical Inc. applied in a 3-8 µm layer can be used. The elastic layer 402 can be a 6, 12, or 25 micron PEN material manufactured by DuPont. Vaporized Al with a nominal thickness of 375 nm can be used as the opaque conductor 406. For a transparent version, sprayed ITO can be used. In both cases, the resistance can be 100-400 ohms/square. In some embodiments, ITO or other conductive material(s) may be sputtered or otherwise deposited on the respective polymer carrier layers. Of course, these examples of materials, thicknesses, electrical properties, and their various combinations and subcombinations, etc., are not to be considered limiting, unless specifically stated otherwise.

[0052] Additional details and alternative manufacturing, operating and/or other options may be implemented. See, for example, US Pat. Nos. 8,982,441; 8,736,938; 8,134,112; 8,035,075; 7,705,826; and 7,645,977; the contents of which are incorporated herein by reference in their entirety.

[0053] Some embodiments may include microscopic perforations or through holes that allow light to pass through the shading screen and allow sunlight to pass through proportionally depending on the angle at which the sun is located. These perforations or openings can contribute to proportional dimming of direct sunlight. The obscuring effects of microscopic holes can be compared to those of outdoor curtains, except that the holes remain invisible because in some embodiments they are too small for the human eye to see. The size, distribution and angle of these openings can be made to control the amount of solar energy entering the building at different times of the year. For example, in summer, when the sun is high in the sky, the size, distribution, and angle of the openings can help reduce sunlight transmission while still allowing some of the light into the building. On the contrary, the openings can be made in such a way that the blackout screen allows the passage of sunlight in winter, reducing the need for heating in the cold season. For example, through-hole design can reduce the amount of incoming sunlight passing through an insulating glass unit by up to 90% in summer (and sometimes even more), while allowing about 35% of sunlight to pass through in winter (and sometimes even more). Thus, perforations can be used to provide a passive approach to sunlight control, combined with a more active and dynamic application of an electrostatically controlled dimming screen. In some embodiments, the design of the openings may reduce the amount of sunlight passing through the glass unit by at least 50% in summer, more preferably at least 60%, even more preferably at least 75%, and sometimes 80- 90% or more. In some embodiments, the design of the apertures may additionally or alternatively provide at least 20%, more preferably at least 25%, and sometimes 30-35% or more of the transmitted energy of sunlight passing through the insulating glass unit. In some embodiments, a single aperture design can provide a difference in solar energy transmission through an insulating glass unit between summer and winter periods of at least about 30%, more preferably at least about 40%, and even more preferably at least least about 50-55%, and sometimes even more.

[0054] It should be understood that the size, shape and/or location of the openings may depend on, for example, the approximate latitude of the installation location of the insulating glass unit, the orientation of the insulating glass unit at that location (for example, whether the insulating glass unit is in a vertical position, such as in a door or window, perpendicular or at an angle, as in the case of a skylight, etc.), etc. For these or other purposes, it is possible, for example, to adjust different angles of the openings, for example, to provide improved dimming ratios, solar heat gain values, etc. .

[0055] Moreover, with regard to hole size, diameter, angle, etc., it should be understood that the thickness (T) of the dynamic dimming screen in some embodiments may be 10-32 microns. In some cases, the size of the diameter or largest dimension of the hole (D) may depend on this thickness. For example, the diameter or largest dimension in some embodiments may be from 0.5T to 5T. It should be understood that 0.5T equates to direct sunlight not passing through the film at an angle greater than 26.5 degrees from the horizontal. This assumes that the opening angle is perpendicular to the outer surface of the dynamic dimming screen. The amount of light depends on the diameter of the hole, the thickness of the dynamic dimming screen, the angle of the holes, and the number of holes. A downward angled opening provides similar light blocking capabilities, but in this case the opening can be larger to better allow indirect light to pass through. The holes can be angled so that direct light does not pass through the shading screen. In the case where D=T, the holes must be offset 45 degrees (up or down) from the perpendicular. This angle increases if D > T.

[0056] In FIG. 5 is a schematic cross-sectional view of an example of an insulating glass unit incorporating an electrical voltage-controlled shading screen including perforations 502 that may be used in conjunction with some embodiments. As shown in FIG. 5, holes are formed in a portion of the blackout curtain 312. Thus, the holes 502 pass through the decorative paint 406, the elastic polymer 402 and the transparent conductor 404 thereon. However, in some embodiments, the openings 502 must not pass through the lower glass portion 304 of the blackout screen. This can be advantageous from a manufacturing standpoint since the glass-on portion 304 can be formed separately from the blackout curtain portion 312. Moreover, in some embodiments, the glass portion 304 may use continuous coating techniques such as spraying or the like, while the fabrication of the shutter portion 312 may include additional steps implemented after the elastic polymer 402 has been coated with the transparent conductor 404. and/or paint 406.

[0057] In some embodiments, openings 502 in shutter portion 312 may be formed using any suitable technique. For example, micro-holes may be formed by laser cutting, stamping, punching, photolithography, drilling (such as, for example, physical drilling, electron beam drilling, etc.), and/or the like. such that the cross section is substantially circular, rectangular, etc. In some embodiments, the diameter or largest dimension will be approximately equal to the overall thickness of the obscuring screen and thus will be approximately 10-30 microns. In some embodiments, the hole formation may remove 30-70% of the shutter 312, more preferably 40-60% of the shutter 312, and in some cases, approximately 50% of the shutter 312 may be removed by the hole formation. In some examples, The formation of the holes removes no more than 50% of the shutter 312. In some embodiments, the holes change the Color Rendering Index (CRI) value of the entire dimming screen, preferably by no more than 10, more preferably no more than 5, even more preferably no more than by 2-3, and sometimes no more than 1 (for example, no more than 0.5).

[0058] Although some embodiments have been described as including through holes, various embodiments may include holes that only partially extend through the shutter 312. In some embodiments, holes may be formed by providing a plurality of plates stacked one on top of the other. In such cases, openings in adjacent layers of plates may partially or completely overlap or not overlap with each other. For example, in one example, multiple layers of plates may completely overlap with each other to form a substantially through hole, while another example may include adjacent layers of plates that may only partially overlap with each other to form an angled through hole. . In another example, multiple layers of plates may not overlap with each other. In some embodiments, a plurality of plates may be stacked on top of each other to form a shutter 312 (or essentially replacing a separate shutter).

[0059] In FIG. 6a-6b with reference to the example of an insulating glass unit shown in FIG. 5 shows how solar radiation can be selectively reflected in some cases. As shown in FIG. 6a, for example, if the sun 600 is high (e.g., during the summer months), solar radiation 602a is more likely to hit the non-removed portion of the extended shading screen shutter 312 than the openings 502 made therein. Thus, a significant portion of the solar radiation will be reflected 602b (and/or absorbed, depending on the embodiment). On the contrary, as shown in FIG. 6b, when the sun 600 is lower in the sky (eg, during the winter months), solar radiation 602 is more likely to pass through apertures 502 provided in the blackout curtain 312.

[0060] In FIG. 7 is a cross-sectional view showing an alternate geometry of the perforations made in the example of the blackout screen shown in FIG. 5 in accordance with some embodiments. In some exemplary embodiments, the openings made in a portion of the blackout curtain 312 may be angled. For example, in FIG. 7 shows openings 502' in shutter 312 at an angle. In some embodiments, this may facilitate selective transmission through the obscuring screen.

[0061] As will be understood from the above description, the dynamic dimming screen mechanism uses a rolled polymer with a conductive layer. In some embodiments, conductor 402 may be integral with polymer 402, or may be an outer coating deposited, sprayed, or otherwise formed on polymer 402. As also noted above, decorative paint 406 may be used in combination with a transparent conductive material (e.g., based on ITO) and/or only partially transparent or opaque conductive layer. In some embodiments, an opaque or only partially transparent conductive layer may eliminate the need for paint. In this regard, in some embodiments, a metal or a substantially metallic material can be used. Aluminum is one example of a material that can be used with or without decorative paint.

[0062] The use of aluminum can be advantageous in some applications as it provides excellent conductivity (low resistance) and high levels of reflectivity to incident sunlight in both the visible and infrared spectra. A further problem with the use of a metallic or substantially metallic layer (eg, a layer containing aluminum or consisting essentially of aluminum) is that internal reflection (and in particular specular reflection) from it can be aesthetically unappealing. In addition, even if reflection is not a problem, the use of such a layer can result in unpleasant coloration for an observer located on the inside of the double glazing unit.

[0063] For some coated articles, anti-reflection (AR) technologies are known and applied. Typically, a layer or series of layers can be applied to the surface from which reflection is to be reduced. Such techniques often use an optical interference model, for example, in which high and low refractive index materials are applied to the surface to be reflected, usually alternating between them. Unfortunately, however, the reduction of reflection from a "very bright" metal, such as surface deposited aluminium, chromium, molybdenum, or the like, creates great technical problems. Reducing the reflection of an uncoated glass surface, for example by about 10% to about 1%, can be difficult, but can nonetheless be achieved using the optical interference technique described above. However, the task of reducing the reflectance of an aluminum-coated surface, which may be around 90% reflective, to as low values as possible is even more difficult, and standard techniques (including standard materials) may not work as intended and as expected based on typical product experience. coated. When working with a highly reflective material such as aluminum and trying to reduce reflection from such a material, it can also be very difficult to maintain color uniformity and/or color change uniformity at visible wavelengths. Indeed, aluminum is not in vain often used in mirror coatings.

[0064] Some embodiments address these issues by applying one or more outer layers to the conductor to reduce visible light reflection and/or changing the color of the dimming screen to provide a more aesthetically pleasing product, and/or by "splitting" the conductor in this manner. so that between them there is a layer that provides a phase shift. In this regard, in Fig. 8a-8c are cross-sectional views of shutters similar to the example shown in FIG. 3, except that overlays are used to enhance the aesthetic appearance of the entire blackout screen, in accordance with some embodiments. Shutter 312' in FIG. 8a includes a reflection-reducing outer cover 802, while shutter 312” in FIG. 8b includes an outer mirror dielectric coating 804. As shown in FIG. 8a-8b, a reflection-reducing outer coating 802 and an outer specular dielectric coating 804 are applied to the conductor 404 and to the main surface of the dimming shield polymer 402 containing (for example) PEN located on the other side of the decorative paint 406. However, it should be understood that the paint 406 need not be provided, for example, if the conductor 404 is not transparent. Mirror coatings, such as, for example, Al, can eliminate the need for decorative paint 406. It should also be understood that in certain embodiments, a reflection-reducing outer coating 802 and an outer specular dielectric coating 804 can be provided on the major surfaces of the blackout screen polymer 402 containing (for example) PEN located on the other side of the conductor 404.

[0065] Various materials can be used for the reflection-reducing outer coating 802 and the outer specular dielectric coating 804. Separate layers that may be used for the reflective outer coating 802 may include, for example, layers containing or essentially consisting of Ni, Cr, NiCr, NiCrOx, Inconel, amorphous silicon (a-Si), arc coal, tetrahedral amorphous carbon (Ta-C), Sb, Ti, NiTi, NiTiOx and/or the like. Typically, such layers can be made with a thickness of 5-100 nm, more preferably 5-60 nm, even more preferably 10-60 nm, and sometimes 20-50 nm or 30-50 nm. More specific examples will be given below.

[0066] The same or similar materials can be used in combination with the outer mirror dielectric coating 804. For example, in some embodiments, a layer stack containing an Al layer sandwiched between layers containing Ni, Ti and/or Cr oxide (for example, layers containing NiCrOx).

[0067] In FIG. 8c shows a shutter similar to that shown in FIG. 3, except that the phase shift layer 806, in accordance with some embodiments, essentially "separates" the conductive layer. In other words, as can be seen in FIG. 8c, the phase shift layer 806 is sandwiched between the first and second conductive layers 404a and 404b to form the shutter 312″'. The same or similar materials and/or thicknesses as mentioned above with reference to FIGS. 8a-8b may be used with the example shown in FIG. 8c. For example, the first and second conductive layers 404a and 404b may contain or consist essentially of a metal such as Al or Ni, NiCr, tin oxide, ITO, and/or the like. The phase shift layer 806 may contain or consist essentially of Ni , Cr and/or Ti or their oxide. Also, titanium nitride and titanium oxynitride can be used in the phase shift layer 806. The phase-shifting layer 806 functions in conjunction with the first and second conductive layers 404a and 404b and can be considered as a reflection-reducing layer. More specifically, the presence of a phase-shifting layer between one fully reflective and one partially reflective layer creates two identical light intensities and simply shifts their phase to obtain at least a partial suppression effect, which is advantageous. It should be understood that the bottom conductive layer 404a may be conductive in some embodiments. In some embodiments, the stack including the phase shift layer 806 and the conductive layers 404a and 404b may be conductive. As noted above, the first and second conductive layers 404a and 404b may have different levels of reflectivity, although this is not required in all embodiments. In some embodiments, the level of reflectivity can be adjusted by the thickness of the coatings (eg, thicker coatings tend to be more reflective). In some embodiments, the first conductive layer 404a may be thinner and/or less reflective than the second conductive layer 404b, for example, so that the decorative paint 406 can absorb light. In some embodiments, the arrangement may be reversed.

[0068] In general, spectral reflectance can also be controlled by reducing the total reflectance and/or changing the layer from a specularly reflective material to a diffusely reflective material. In this regard, the techniques described below can be used, and can be used in any suitable combination, subcombination, or combination of subcombinations with each other and with the approaches shown in FIG. 8a-8c. The first method involves roughening the top surface of the conductive (often metal) layer by sandblasting, shot blasting, grain blasting, or other blow blasting, laser ablation, stamping, or the like. This can help to roughen the surface of the conductive layer and provide the desired diffuse effect. reflections. In some embodiments, the surface roughness (Ra) is less than 3.2 microns.

[0069] Another approach that can be used involves chemical (eg, acid) etching of the conductive material, creating irregularities and thus increasing surface roughness. Yet another approach involves embossing the polymeric substrate in various patterns prior to applying a conductive coating to the material. This can help to increase the surface roughness of the polymer substrate, and during the formation of a substantially conformal thin film, such as by sputtering or the like, the texture of the polymer substrate can substantially be transferred to the conductive coating. This can be achieved during, for example, a calendering process, in which the rollers through which the polymer film passes have a pattern that is transferred to the polymer substrate. Using a physically textured approach such as this, the first and/or second major surfaces of the polymeric substrate may be textured in a predetermined pattern, such as a pattern defined at least in part in terms of relief features formed on the polymeric material. In this sense, the depth of the elements may be predetermined. In addition, in some embodiments, the predetermined pattern may be defined at least in part with respect to an area extending across the polymeric substrate. In some embodiments, a fractal pattern may be used. It should be understood that, in addition to or instead of calendering, stamping, extrusion and/or the like may be used.

[0070] If a layer of metal such as aluminum is used, it may be anodized. Anodizing the metal layer can help to roughen the surface as well as color, which can be an advantage in some embodiments.

[0071] Another approach involves the direct or indirect application of paint to the surface of the conductive layer. The paint may be applied continuously or intermittently. At present, a PVC-based paint is applied to the polymer substrate from the side opposite the conductive layer. However, applying paint to the conductive layer will help reduce reflection and provide another means of adding different colors, images, and/or the like to the curtain. The paint in this case can be used instead of paint on the opposite side of the polymer substrate, or together with it.

[0072] As such, in addition to or instead of using optical interference techniques to reduce reflection, one can also add a textured surface to the base polymer, chemically or physically modify the conductive layer, and/or add a layer of paint, for example, to achieve the same or similar goals and achieve further reduction of unwanted reflection, etc.

[0073] In FIG. 9-11 are plots of percent reflectance versus wavelength for some examples of overcoat materials that can be used in combination with the layer stacks shown in FIG. 8a-8b, in some embodiments. The data shown in these graphs is simulated. On each of Figs. 9-11 shows the reflection for uncoated aluminum deposited on a 12 µm PET sheet as a function of wavelength. Aluminum can be applied by evaporation, electrochemical deposition, and/or the like. These graphs also show reflection for a stack of layers that includes the same layer of aluminum, but covered with a single layer coating of different materials (except for the layer stack of NiCrOx/Al/NiCrOx) .

[0074] The thickness of these layers was chosen in such a way as to achieve the lowest possible reflection, while at the same time minimizing color change during reflection. As can be seen from these graphs, it is difficult to achieve both low reflectivity and panchromaticity at the same time. The best curve is achieved using arc carbon, a material that is not sputterable, but can be formed by generating an arc by passing high currents through a bar of pure carbon pressed against a carbon plate. Although this material is desirable in terms of reflection and color properties, it may not be possible to produce it on a large scale. However, the characteristics of Ta-C approach those of arc carbon, and Ta-C can be deposited, for example, using a graphite target. Thus, in some embodiments, a layer containing Ta-C may be desirable. Additional results regarding outer coating materials are presented below.

[0075] An outer coating layer containing NiCrOx was formed on the layer containing Al to reduce reflection as shown in FIG. 9 and 11. The thicknesses of the outer layer containing NiCrOx were essentially in the range of 20-60 nm, and specific examples include 20 nm, 30 nm, 40 nm, 45 nm, 47 nm, 49 nm, 50 nm, and 57 nm. In some embodiments, an 80Ni-20Cr target may be used, and this target was intended to be used for the simulation purposes shown in FIG. 9 and 11. The oxygen content can be changed to produce a range of different colors while maintaining electrical conductivity. A film sample with a thickness of 50-60 nm was formed on top of the layer containing Al, and the color of the film was blue-violet, which is in good agreement with the models. In this case, use. The alternative stoichiometric ratio of NiCr may give different results in different embodiments.

[0076] To further reduce the reflection of visible light from the dimming screen, additional layers of NiCrOx and Al can be applied to the dimming screen. Thus, an Al-containing layer was sandwiched between the NiCrOx-containing layers, and this three-layer stack was deposited on top of the Al-containing conductive layer. Simulations were performed to optimize the layers to obtain a low reflective topcoat surface. The simulation results can be seen in Fig. 9. The total reflection was less than 15%. In this case, 80Ni - 20Cr was used, although alternative NiCr stoichiometric ratios may give different results. As stated above, the oxygen content can be changed to produce a range of different colors while maintaining electrical conductivity. In some embodiments, the layer stack containing NiCrOx/Al/NiCrOx may have a total thickness of 3-60 nm, more preferably 3-30 nm, and even more preferably 3-15 nm. In some embodiments, monolayers containing NiCrOx, Al or the like may have a thickness of 3-15 nm.

[0077] Another way to significantly reduce the overall visible light reflection of the aluminum layer includes the addition of a carbon outer coating. Carbon deposition by cathode arc deposition was simulated to determine the reduction in visible light reflection and can be seen in FIG. 9 and 11. The optimized model predicts an overall reflectivity of less than 10%. Exemplary thickness values are in the range of 30-60 nm, with specific example values being 45 nm and 50 nm.

[0078] A layer containing metallic NiCr can also be applied over a conductive layer containing Al to reduce the overall reflection of visible light. On FIG. 10 shows the simulated performance of 10 nm thick, 20 nm thick, 30 nm thick, and 40 nm thick layers. On FIG. 11 shows that examples with a thickness of 43 nm as well as 45 nm and 47 nm are also provided separately.

[0079] As noted above, other materials that can be used in a single layer or other outer coatings include: a-Si (for example, 20-30 nm thick and, for example, 21 nm thick, 23 nm thick, as shown in Fig. .11, and 25 nm thick); inconel, eg Inconel 600 (eg 40-60 nm thick and eg 47 nm thick, 50 nm thick as shown in Fig. 11 and 53 nm thick); and Ta-C (e.g., 20-60 nm thick, with specific examples being 39 nm thick, 41 nm thick, 43 nm thick, 45 nm thick, as shown in Fig. 11, 47 nm thick, and 49 nm thick). Layers containing Sb and/or Ti can also be used at the total thickness described above and can be suitable for low reflection and good coloration. As is known, Inconel is a family of austenitic superalloys based on nickel and chromium, which are materials that are resistant to oxidative corrosion. Inconel 600 includes (by weight) 72.0% Ni, 14.0-17.0% Cr, 6.0-10.0% Fe, 1.0% Mn, 0.5% Cu, 0.5 % Si, 0.15% C and 0.015% S.

[0080] In some embodiments, through the use of outer coatings of the type described herein and/or other outer coatings, internal reflection is preferably reduced to less than 60% for all or substantially all of the 400-700 nm wavelength range, more preferably to less than 50 % for the entire or essentially the entire wavelength range of 400-700 nm, and even more preferably up to less than 30-40% for the entire or essentially the entire wavelength range of 400-700 nm. Sometimes internal reflection is reduced to less than 20% for all or substantially all of the 400-700 nm wavelength range (eg, as is the case with a carbon-based outer coating). Preferably the reflectance differs by no more than 30% over all or substantially all of the 400-700 nm wavelength range, more preferably by no more than 20% over all or substantially all of the 400-700 nm wavelength range, and sometimes by no more than 10-15% over or substantially over the entire 400-700 nm wavelength range.

[0081] In some embodiments, an oxygen plasma and/or other purification process may be applied to the polymer 402, for example, prior to forming the conductive layer 404.

[0082] Given that the thin film and/or other materials constituting the shutter must withstand repeated twisting and unwinding operations in accordance with the functions of the entire obscuring screen, it should be understood that the materials can be selected and the entire stack of layers can be formed so that the mechanical and/or other properties contributed to it. For example, excess stress in a stack of thin film layers is generally considered unfavorable. However, in some embodiments, excessive stress can cause cracking, "flaking"/separation, and/or other damage to conductor 404 and/or the outer coating layer or layers formed thereon. Thus, in certain embodiments, low stress (and in particular low tensile stress) may be particularly desirable in relation to the layer(s) formed on the shutter polymer base.

[0083] In this regard, the adhesion of sputtered thin films depends, among other things, on the stress in the deposited film. One way to correct the stress is the deposition pressure. The stress vs. spray pressure curve is not a monotonic curve, but has a kink at the transition pressure, which is essentially unique to each material and depends on the ratio of the material's melting temperature to the substrate temperature. Work with voltage can be carried out by optimizing the gas pressure, taking into account these guidelines.

[0084] Other physical and mechanical properties of the darkening screen that are worth considering include the elastic modulus of the polymer and the layers formed thereon, the density ratio of the layers (which can affect stress/strain), etc. These properties can be balanced against their influence to internal reflection, conductivity and/or the like.

[0085] As is known, temperatures within an insulating glass unit can rise quite a lot. For example, it has been noted that an insulating glass unit according to the example of FIG. 2 containing black pigment can reach temperatures of 87°C, for example, if the black part of the shading screen faces the sun at elevated temperatures and in climates with high solar radiation (for example, in areas of the southwestern United States, such as Arizona). The use of PEN material for spun/spun polymer can be advantageous because PEN has a higher glass transition temperature (-120°C) compared to other common polymers such as PET (Tg=67-81°C), polypropylene (PP) ( Tg = -32 °C). However, if PEN is exposed to temperatures approaching the glass transition temperature, material characteristics that are otherwise favorable in terms of mechanical properties (including modulus of elasticity, yield strength, tensile strength, modulus of elasticity at relaxation, etc.) may deteriorate over time, especially when exposed to elevated temperatures. If these mechanical properties deteriorate significantly, the shading screen will no longer be able to function (for example, the shading screen will not retract).

[0086] FIG. 12-13 demonstrate these problems. More specifically, in FIG. 12 shows the effect of temperature on Young's modulus as it is a graph of Young's modulus versus temperature for various polymeric materials, and FIG. 13 shows typical stress relaxation curves for a PET film at various temperatures. On FIG. 12 Film A is PEN, Film B is PET, and Film C is PI. In general, polymeric materials with higher glass transition temperatures have better mechanical properties at elevated temperatures.

[0087] In order for the dimming screen to better withstand elevated temperature conditions, replacing PEN with polymers with better elevated temperature resistance may be advantageous. Two possible polymers are polyetheretherketone (PEEK) and polyimide (PI or Kapton). PEEK has a Tg ~ 142°C and Kapton HN has a Tg ~ 380°C. Both of these materials have better mechanical properties at elevated temperatures compared to PEN. This applies in particular to temperatures above 100 °C. This can be seen in the following table, which shows the mechanical properties of PEN (Teonex), PEEK and PI (Kapton HN). UTS stands for Ultimate Tensile Strength.

PEN PEEK PI 25°C UTS (pounds per square inch) 39 000 16 000 33 500 Modulus of elasticity (psi) 880 000 520 000 370 000 Yield Strength (psi) 17 500 10,000 200°C UTS (pounds per square inch) 13 000 8000 20 000 Modulus of elasticity (psi) 290 000 Yield Strength (psi) ˂ 1000 6000 Tg ~ 121°C ~ 143°C ~ 380 °C

[0088] It should be understood that changing the shading screen base material from a current material (PEN) to an alternative polymer (e.g., PEEK or PI/Kapton) that has improved mechanical properties at elevated temperature may, in some embodiments, provide an advantage in that meaning that the blackout screen will be able to better withstand the temperatures inside the insulating glass unit, especially if the blackout screen is installed in hot climates. It should be understood that, in some embodiments, an alternative polymer may be used in the shutter and/or the layer applied to the glass.

[0089] As an addition or alternative, in some embodiments, a colored polymeric material can be used. For example, dyed PEN, PEEK, PI/Kapton, or other polymer can be used to create curtains that have different colors and/or aesthetics. For example, colored polymers may be advantageous for transparent/translucent embodiments, for example, in which the conductive layer of the obscuring screen is a transparent conductive coating, and the like.

[0090] Although PI/Kapton is a known polymer that is used in a wide variety of applications, it is sometimes considered unacceptable in applications where optical and aesthetic qualities are important. This includes many window options. One of the reasons for the limited use of PI/Kapton is due to the generally accepted belief that it has an essentially yellow-orange color. Such coloration is generally considered aesthetically unappealing. Given the many alternative polymers available, the use of PI/Kapton can easily be avoided. However, in some embodiments, it would be desirable to use PI/Kapton (and/or PEN) in the darkening screen because it can withstand high temperatures and has good mechanical properties even at high temperatures, as outlined above. PI/Kapton (and/or PEN) also has good shrink characteristics (eg controlled and high shrink rates, strong roll forming ability, etc.), thus making a good curtain spring. However, given typical optical limitations and the preference of those skilled in the art, using a PI/Kapton for a shutter would be counter-intuitive. However, the inventors have recognized that in embodiments where the shutter is opaque or substantially opaque, the color of the PI/Kapton becomes practically unimportant. Thus, when PI/Kapton is used in combination with an opaque or only partially transparent shutter, its yellow-orange color is difficult to see with the naked eye. Thus, the favorable properties of PI/Kapton regarding high temperature tolerance, spring action, etc. can be realized even in window applications where the use of this material would not otherwise be self-evident. In some embodiments, PI/Kapton can be applied as a liquid (eg, over ITO or other conductive coating) and cured, thus enabling fast, low cost, high volume production over potentially large areas suitable for windows. Generally, PI/Kapton has better high temperature modulus and high temperature yield strength, better resistance to elevated temperature stress relaxation, higher glass transition temperature, etc., than alternative shutter materials. Now PI/Kapton can also be supplied in different colors (eg related to dyeing), such as black.

[0091] In this regard, it should be understood that transparent or translucent blackout screens may be desirable for some applications. These types of dimming screens can be made using a base polymer (eg PEN) together with a conductive layer of a transparent conductive coating such as ITO or a low emissivity coating that causes color shift. In some embodiments, a colored base polymer (eg, PEN, PEEK, PI/Kapton) and/or other material may be used to produce a translucent or transparent dimming screen in various colors. Coloring can be carried out by impregnating the film substrate matrix with dyes, UV absorbers and/or the like. In this way, films with properties such as light transmission from 1% to 85% of VLT5 (5% visible transmission) can be obtained. light), and it may be lower at some wavelengths; optical density from 0.10 to 1.3; UV protection for up to 97% absorption; any color(s); etc.

[0092] Based on the above description, it should be understood that the shutter conductor serves several purposes, including, for example, receiving voltage to roll up or unfold the dimming screen. In some embodiments, the shutter conductor may be highly reflective in the IR and/or UV spectrum. The transparent conductor also increases the spring force of the shading screen roll, for example as a result of its mechanical properties (including modulus and yield strength). The spring force also increases due to the transparent conductor as a result of the thermal expansion mismatch between the conductor material and the polymer substrate during the heat treatment used to produce the roll. A polymer substrate (eg PI, PEN or the like) shrinks irreversibly when heated above its glass transition temperature (Tg). When both materials are heated above Tg and then cooled back to room temperature, the irreversible shrinkage of the polymer results in a residual stress mismatch between the polymer substrate and the conductive layer, which creates a helical spring. In general, the difference in coefficient of thermal expansion (CTE) is favorable for spring force, but unfavorable for splitting/cracking/delamination, etc. This is one of the reasons why a metal conductive layer or a conductive coating containing a metal conductive layer, as described herein may have better performance than the ITO layer. In other words, ITO is brittle and cracks severely at high stresses, resulting in the loss of the ability to withstand the stress required to develop spring force.

[0093] Thus, it should be understood that the strength of the coil spring depends on the material that is used as the conductive layer, as well as the thickness of the conductive layer. As stated above, the conductive layer found on the polymer may contain Al, a combination of Al and Cr, ITO, and/or the like. Conductive layers containing aluminum may be useful for opaque applications, while conductive layers containing ITO better suited for transparent/translucent applications. For example, with an Al thickness of approximately ~375 nm and a low modulus of elasticity of Al, a roll with a given composition may be limited in its range of operation (for example, the height of an insulating glass unit or the length of a blackout screen may be limited).

[0094] Ceteris paribus, a longer roll will have a greater mass, and if the spring force does not exceed the mass of the roll in the extended state, the dimming screen will not retract (twist). To obtain a working blackout screen, there is a range of spring force that the roll must have. For example, if the spring force of the roll is less than the mass of the roll, then the roll will not retract (and the blackout screen will always be in the down position). Similarly, if the spring force of the roll is greater than the sum of the mass of the roll and the maximum electrostatic force that can be applied (with the electrostatic force depending on the applied voltage, the thickness of the dielectric layer and its dielectric constant), the roll will not advance (unwind). On FIG. 14 is a summary of the main limitations of the dimming screen features that may appear in some embodiments.

[0095] Some embodiments relate to alternative conductive materials that favorably change the spring force of the twisted blackout screen so that it can be used at various lengths. In this regard, the inventors have found that the properties of the conductive layer that increase the strength of the roll include: increasing the modulus of elasticity, increasing the difference in coefficients of thermal expansion (CTE) between the polymer substrate and the conductive layer, and increasing the ratio of elastic modulus to density. Some pure metals that can be used to increase coil strength over Al or Cr include Ni, W, Mo, Ti, and Ta. The elastic modulus of the investigated metal layers ranged from 70 GPa for Al to 330 GPa for Mo. The CTE value for the investigated metal layers ranged from 23.5×10 ^-6 /K for Al to 4.8×10 ^-6 /K for Mo. In general, the higher the modulus, the higher the CTE mismatch between PEN or other polymer and metal, the lower the density, etc., the better the material option is in terms of coil formation. It has been found that the incorporation of Mo and Ti-based conductive layers in dimming screens results in a coil spring force significantly greater than that obtainable with Al. The table in Fig. 15 includes roll strength specifications for several materials that may be relevant in some embodiments. Some embodiments include a polymeric backing material based on PEN, PEEK, PI, or the like supporting (in order from the substrate) an Al containing layer and then a Mo containing layer, which is advantageous. Some embodiments include the thin film(s) layer(s) in the conductive coating and/or the conductive coating itself with a higher modulus of elasticity and a lower CTE than Al, which is advantageous.

[0096] Some of the materials referred to herein may not have the desired corrosion resistance. Thus, some embodiments may include a thin outer layer containing Al, Ti, stainless steel, or the like, for example, to improve corrosion resistance. The formation of a protective oxide (eg alumina, titanium oxide or chromium oxide for stainless steel) essentially contributes to corrosion resistance. The thickness of the oxide layer will essentially be about 2-7 nm. At least 5nm of base metal is needed to provide some protection, and some embodiments may include about 50nm or more of base material as the extra thickness helps to increase roll strength. It should also be noted that although the spring force and density of the roll can be improved compared to the aluminum based conductive layer, the stress mismatch between the polymer layer and these alternative conductive materials can be problematic. For example, in the case of using Mo and Ti in conductive layers based on these materials, splitting, cracking, delamination and/or other problems have been observed. These problems are believed to be related to the residual voltage in the conductive layers. However, the introduction of a thin layer containing Al between the polymeric substrate and the conductive layer can reduce some of these problems, for example, by making it easier to create a stress mode leading to less brittleness and/or a tendency to wrinkle, peel, etc. For example, in certain examples In an embodiment, a thin layer containing Al can be used to change the stress mode in the stack of layers supported by the polymer substrate from the total tensile stress mode to the total compressive stress mode. However, it should be noted that there is a balance to be had in terms of going from a regimen that can be prone to cracking to one that, if overextended, can lead to wrinkling. Thus, it should be understood that some embodiments may improve spring performance by using alternative materials with or without stress-reducing underlays. The thickness of the stress-reducing layer may vary depending on the amount of stress to be reduced, and other materials may be used in other embodiments. In addition, since a thin Al-containing layer is used as the stress-reducing underlayer or outer corrosion-reducing layer, the reflectivity may not be as high as otherwise, and/or the color may not shift too much to unfavorable range even when used in transparent applications. In some embodiments, the thickness of the underlayer and/or the corrosion reducing outer layer, individually or in combination, may be less than 375 nm. It should be understood that the thin film(s) layer(s) in the second conductive coating may be selected and formed such that the shutter moves between open and closed positions with greater spring force than a shutter with a second conductive coating including only layer containing Al.

[0097] Thus, in some embodiments, a PEN, PI, or other polymer substrate used as a curtain can support a thin layer containing Al as a stress control and a conductive layer containing Mo, Ti, or etc. applied to it directly or indirectly. The conductive layer may serve as a substrate for a corrosion resistant layer containing Al, Ti, stainless steel, or the like. A decorative paint or the like may optionally be applied to the side of the substrate opposite these layers.

[0098] Building utility integrated photovoltaic (BIPV) technology in a variety of residential and commercial settings continues to evolve. In some embodiments, solar cells may be embedded in an insulating glass configuration and are thus referred to as BIPV technology. For example, in some embodiments, the solar cells are embedded in the shutter. Thus, solar energy is not "wasted". Many different solar cell technologies are available. However, some embodiments take advantage of gallium indium copper selenide (CIGS) solar cells because they are generally the most flexible type of solar cell available. A CIGS solar cell is a thin film solar cell used to convert sunlight into electrical energy. A CIGS solar cell can be made by depositing a thin layer of copper, indium, gallium, and selenide on a glass or plastic substrate, along with electrodes on the front and back to drain current. Because the material has a high absorption coefficient and strongly absorbs sunlight, a much thinner film is required than with other semiconductor materials. This, in turn, allows for the high flexibility mentioned above. In some embodiments, a conductive (eg, metallic) layer is used as the main conductive layer of the CIGS module. A thin n-type buffer layer is applied over the absorber. The buffer layer on the conductive layer is usually cadmium sulfide (CdS) applied by chemical bath deposition or the like. zinc oxide (ZnO : Al or AZO). The i-ZnO layer is used to protect the CdS and the absorber layer from damage when sputtering the ZnO:Al layer, since the latter is usually sputtered at DC, which is known to damage sensitive materials. It is known that high temperatures are also used in the sanitization process. Thus, PI, PEN, etc. are good options for curtain use, for example, because they are able to withstand higher temperatures, as described above. The AZO layer serves as a transparent conductive oxide for collecting and withdrawing electrons from the cell, also absorbing a minimal amount of light. Additional information regarding CIGS technology, including CIGS solar cell techniques, materials, material thicknesses that can be used, etc., can be found in US Pat. Nos. 9,691,917; 9,419,151; 9,312,417; 9,246,025; 8,809,674; and 8,415,194, the contents of which are each incorporated herein by reference in their entirety.

[0099] As will be understood from the above description, a voltage is applied to the conductive layer to move the dimming screen up and down. When no voltage is applied to the conductive layer, and when the shutter is in the extended position, the shading screen can function as a CIGS photovoltaic module. The energy generated by the CIGS dimming screen can be used to power the batteries that are used to operate the dimming screen, or it can be fed into the home/office. This can be of particular benefit for retrofit applications, such as where a dimming screen may be difficult or impossible to connect to an external power source. Regardless of whether an insulating glass unit is used in a retrofit or reinstallation application, an insulating glass unit in accordance with some embodiments can be self-contained in terms of power, due to the inclusion of a CIGS solar cell.

[00100] In Fig. 16 is a schematic view of a shutter incorporating a CIGS solar cell that may be used in conjunction with some embodiments. As shown in FIG. 16, a conductive layer 404 is applied to one major surface of the blackout screen resin substrate 406, and an optional decorative paint is applied to the opposite major surface. Other layers involved in the operation of the CIGS solar cell are formed on the conductive layer 404 and include, for example, an absorbing CIGS layer 404, another conductive layer 1604 (eg, consisting of or including ZnO). An optional anti-reflection coating 1606 is formed on the top conductive layer 1604. Such an anti-reflection coating 1606 may, in some embodiments, increase the amount of visible light reaching the CIGS absorbing layer 404. In some embodiments, the anti-reflection coating 1606 may be a single broadband anti-reflection layer. In other embodiments, the anti-reflection coating 1606 may include a plurality of layers operating on the aforementioned optical interference principle, and thus may include alternating layers of high and low refractive index dielectric material. The anti-reflection coating 1606 can also contribute to the coloration of the curtain, as described above. A contact 1608 to the front surface is also provided. Conductive layer 404 in some embodiments may be a multi-layer coating. In such cases, the conductive coating may include a layer or layers containing Mo, Al, Cr, Ni, Y, and/or the like. For example, in some embodiments, a thin layer containing Al may be coated with a layer containing Mo . This design can be advantageous in that the used Mo-containing layer can serve as an effective back-surface contact for the 1602 CIGS absorber layer while improving shutter spring performance, and the inclusion of an aluminum-containing layer can help maintain conductivity. contact to the back surface of Mo and at the same time favorably affect the mechanical stress regime in the overlying CIGS layers (including the layer containing Mo). Thus, in some embodiments, already flexible CIGS materials can be made to be more suitable for curtain applications. The following are examples of thickness values that can be used in connection with some embodiments: Mo containing layer 0.5-5 µm thick, CIGS containing layer 1-7 µm thick, CdS containing layer 0.01-5 µm thick. 0.1 µm, 0.1-1 µm thick ZnO-containing layer, and 0.05-0.15 µm thick anti-reflective coating.

[00101] A CIGS solar cell or other self-contained power supply mechanism need not be provided in all embodiments. Thus, alternative techniques for electrically connecting the dimming screen to an external power source and/or controller may be envisaged. In this regard, in Fig. 17-19 show how a dimming screen can be connected to the glazing and supplied with power, in accordance with some embodiments. As shown in these figures, the blackout screen components 1702 applied to the glass are attached to the hollow anchor stop 1704 or busbar and to the substrate 1706 with silver paste 1708 and epoxy resin 1710 or the like. The wires are soldered to the anchor stop 1704, and then pass along the perimeter to the bottom of the double-glazed window, where the lower anchor stop (blocking limiter) is located.

[00102] An electrical connection is formed between the ITO or other conductive coating 306 on the substrate 302 and the conductive tapes 1802 and 1804 (such as, for example, copper tape) using a conductive epoxy resin, anisotropic conductive film 1806 (ACF), or the like. Wires are soldered to the conductive tape 1802 and 1804 and run around the perimeter of the IG to the bottom corner where two wires (the ITO backing wire and the wire from the anchor stop) pass through the IG spacer out of the IG, for example for electrical connection to an external power supply or the like. n. In some embodiments, there is essentially a connection extending from the ITO to the conductive epoxy, to the copper tape, or to the silver solder on the glass.

[00103] In Fig. 20 is a schematic diagram showing an alternative approach to connecting a shading screen to a glazing and to supplying power, in accordance with some embodiments. This alternative design example includes printing or otherwise applying silver solder 2002a-2002b to glass substrate 2000, such as along its peripheral edges. Components 304 applied to glass (for example, including a polymer film 308 of PET or other polymer and a thin layer conductive coating (TCC) 306 containing ITO or the like) are applied over the silver solder 2002a-2002b. The first part of the silver solder 2002a on the glass 2002 is bonded or otherwise electrically connected to the TCC 306 containing ITO or the like by a conductive epoxy resin, ACF or the like, thereby forming a connection 2012 of the silver solder and the ITO layer. An obscuring screen (shown for purposes of explanation in FIG. 20 in a partially deployed 2016 configuration), a top rail 2004 and a bottom rail 2006 are fixed over the glass coated components 304 with epoxy or the like. Wires 2008a and 2008b are soldered from the top and bottom tires 2004 and 2006 to the second part of the silver solder 2002b, as shown in FIG. 20 and from the bottom rail 2006 and the first silver solder portion 2002a. The wires 2014a and 2014b from the first part of the silver solder 2002a and the bottom rail 2006 pass through the insulating glass spacer outward from the insulating glass. These protruding wires may be connected to a power source and/or a controller. One or more seals may be provided to ensure that gas escapes from the insulating glass cavity, moisture enters the insulating glass cavity, etc.

[00104] In Fig. 21 is a schematic diagram showing an alternative approach to connecting a shading screen to a glazing and to supplying power, in accordance with some embodiments. This example of an alternative configuration involves the use of silver solder but no wires at least internal to the spacer. As in the example shown in FIG. 20, glass coated components 304 are layered over silver solder 2002a-2002b. In addition, as mentioned above, the first part of the solder 2002a is bonded or otherwise electrically connected to the TCC 306 containing ITO or the like with a conductive epoxy resin, ACF, or the like. 2006 is attached over the glass 2000' with epoxy or the like and to the silver solder by welding, soldering, and/or the like. Thus, this configuration is similar to that shown in FIG. 20. However, in order to form the silver solder bar joints 2100a-2100b shown in FIG. 21, welding, soldering, conductive epoxy, ACF, and/or the like are used. Such silver solder bar connections 2100a-2100b are provided with respect to the second silver solder portion 2002b and are used instead of the wires 2008a-2008b. Electrical connections to the glass edge are made with 2102 silver solder passing under the spacer. This silver solder 2102 extends from the bottom bar 2006 and the end of the first portion of the silver solder 2002a closest to the bottom bar 2006, thus taking the place of the wires 2014a-2014b in the embodiment shown in FIG. 20, and potentially eliminating the need for a spacer hole or holes. As above, welding, soldering, conductive epoxy, ACF, and/or the like can be used to form these electrical connections. Electrical wire connectors can be soldered to silver solder on the outside of the IGU or at least outside of the spacer.

[00105] It should be understood that in some embodiments, the presence of Ag on the glass 2000' and passing under the separator (instead of forming a hole in the separator) may be advantageous. For example, the absence of a hole can reduce or slow down gas leaks, moisture intrusion into the cavity of an insulating glass unit, etc. These problems can otherwise shorten the life of an insulating glass unit, for example, due to the possibility of internal moisture. The presence of internal moisture can lead to unwanted haze, and even at a relative humidity of 5-8% can lead to charging interference and premature failure of the dimming screen.

[00106] Although silver solder is mentioned herein, it should be understood that other types of solder can be used in various embodiments. It should also be understood that a low emissivity coating, ITO, or other conductive material placed directly on the glass (eg, without a bonding layer) can be used to accomplish the same or similar purpose as silver solder.

[00107] Thus, referring to FIG. 20-21, it should be understood that the first and second electrically conductive lines may be located on the first and second opposite edges of the first substrate, with each of the lines having first and second ends, and while the first and second lines are directly or indirectly located on a dielectric or insulating film. The first and second conductive solder patterns may be applied directly or indirectly to the first substrate, the solder being located between the first substrate and the first conductive coating, the first solder pattern being electrically connected to the first conductive coating, the first and second patterns extending along the third and fourth opposite edges. of the first substrate, wherein the edges from the first to the fourth are different from each other, and the first pattern extends in the direction from the first end of the first tire to the first end of the second tire, the second pattern extends in the direction from the second end of the first tire to the second end of the second tire. A conductive epoxy resin, an anisotropic conductive film (ACF), or the like may electrically couple the first solder pattern to the first conductive coating.

[00108] In some embodiments, the first set of wires may electrically connect the first and second busbars to the second solder pattern near their second ends; and the second set of wires may be electrically connected to the first end of the second line and the end of the first solder pattern near the first end of the second line. In such cases, the second set of wires may pass through a hole in the separator system for electrical connection to the power supply.

[00109] In some embodiments, the third and fourth conductive solder patterns may electrically connect the first and second lines to the second solder pattern near the second ends of the first and second lines; and the fifth and sixth conductive solder patterns may be electrically connected to the first end of the second line and the end of the first solder pattern near the first end of the second line. In such cases, the fifth and sixth solder patterns may extend to the outer edges of the first substrate under the spacer system for electrical connection to the power source, such as such that the fifth and sixth solder patterns are provided between the spacer system and the first substrate. In some embodiments, the electrical connections between the power source and the first and second conductive coatings may not include wires within the separating system.

[00110] The insulating glass units described herein may include low e coatings on any one or more of surfaces 1, 2, 3, and 4. As noted above, such low e coatings can serve as conductive layers for blackout screens, for example. In other embodiments, in addition to or in addition to functioning as conductive layers for blackout screens, a low emissivity coating may be applied to another inner surface. For example, a low e coating may be applied to surface 2 and an obscuration shield may be provided relative to surface 3. In another example, the location of the obscuration shield and the low e coating may be reversed. In any case, a separate low-e coating may or may not be used to assist in the operation of the dimming screen provided with respect to the third surface. In some embodiments, the low e coatings deposited on surfaces 2 and 3 may be silver based low e coatings. Examples of low-e coatings are described in US Pat. Nos. 9,802,860; 8,557,391; 7,998,320; 7,771,830; 7,198,851; 7,189,458; 7,056,588; and 6,887,575; the contents of which are incorporated herein by reference in their entirety. Low emissivity coatings based on ITO and/or the like can be used for internal surfaces and/or external surfaces. See, for example, US Pat. Nos. 9,695,085 and 9,670,092; the contents of which are incorporated herein by reference in their entirety. These low-e coatings can be used in combination with some embodiments.

[00111] Anti -reflective coatings may also be applied to the major surfaces of the insulating glass unit. In some embodiments, an anti-reflection coating may be applied to each primary surface that does not have a low-e coating and a blackout screen. Examples of anti-reflective coatings are described in, for example, US Pat. Nos. 9,796,619 and 8,668,990 and US Patent Publication No. 2014/0272314; the contents of which are incorporated herein by reference in their entirety. See also Document No. 9,556,066, the contents of which are incorporated herein by reference in their entirety. These anti-reflection coatings can be used in combination with some embodiments.

[00112] The embodiments described herein can be used in a wide variety of applications including, for example, commercial and/or residential interior and exterior windows, skylights, doors, display cases such as refrigerators/freezers (e.g. , in their doors and/or "walls"), vehicles, etc.

[00113] While some embodiments have been described in relation to insulating glass units comprising two substrates, it should be understood that the techniques described herein can be applied to so-called triple insulating glass units. In such insulating glass units, first, second and third substantially parallel and spaced apart substrates are separated by first and second separation systems, and blackout screens may be provided adjacent to any one or more of the interior surfaces of the innermost and outermost substrates and/or one or both surfaces of the middle substrate.

[00114] Although some embodiments have been described as including glass substrates (for example, for use as the inner and outer panel of the insulating glass units described herein), it should be understood that other embodiments may include a non-glass substrate for one or both of such panels. For example, plastics, composite materials, and/or the like can be used. When glass substrates are used, such substrates can be heat treated (e.g., heat strengthened and/or heat tempered), chemically tempered, left in an annealed condition, etc. In some exemplary embodiments, the inner or outer substrate may be layered on another substrate of the same or different material.

[00115] As used herein, the terms "on", "applied to", etc. should not be taken to mean that two elements are located directly adjacent to each other, unless this is explicitly indicated. In other words, the first layer can be said to be "on" or "applied to" the second layer, even if there are one or more layers in between.

[00116] In some embodiments of the invention, an insulating glass unit is provided. Each of the first and second substrates has inner and outer major surfaces, wherein the inner major surface of the first substrate faces the inner major surface of the second substrate. The separating system helps to keep the first and second substrates substantially parallel and spaced apart from each other and forms a gap between them. Between the first and second substrates is a dynamically controlled dimming screen, and dimming screen includes: the first conductive film located directly or indirectly on the inner main surface of the first substrate; a dielectric or insulating film located directly or indirectly on the first conductive film; and a shutter including a polymeric material holding the second conductive film, wherein the polymeric material is configured to extend to perform the function of the closed position of the shutter and retract to perform the function of the open position of the shutter, and the shutter further includes a plurality of holes passing through at least a part of the polymeric material, the apertures being invisible to the naked eye and sized, shaped, and positioned to form a passive shading element that provides gradual shading from sunlight when the polymeric material is pulled to the closed position of the shade. The first and second conductive films are electrically connected to a power source, which is configured to control it to selectively set an electrical potential difference to appropriately transfer the polymer material between the open and closed positions of the shutter.

[00117] In addition to the elements of the previous paragraph, in some embodiments, when forming holes, 40-60% of the polymeric material can be removed.

[00118] In addition to the elements of any of the two previous paragraphs, in some embodiments, less than 50% of the polymeric material can be removed when forming holes.

[00119] In addition to the elements of any of the previous three paragraphs, in some embodiments, the holes may have a diameter or maximum dimension equal to the thickness of the polymeric material.

[00120] In addition to the elements of any of the four previous paragraphs, in some embodiments, the holes may have a diameter or largest dimension of 10-30 microns.

[00121] In addition to the elements of any of the previous five paragraphs, in some embodiments, the openings may be through holes in the dimming screen and extend completely through at least the polymeric material and the second conductive film.

[00122] In addition to the features of any of the previous six paragraphs, in some embodiments, the openings may extend through at least a portion of the polymeric material in a direction substantially perpendicular to the major surface of the polymeric material formed when the polymeric material is extended to the shutter closed position.

[00123] In addition to the elements of any of the previous seven paragraphs, in some embodiments, sunlight dimming may include reflecting a first amount of solar energy when the sun is in the first position and a second amount of solar energy when the sun is in the second position.

[00124] In addition to the elements of any of the previous eight paragraphs, in some embodiments, the gradual dimming from sunlight can lead to a difference in the transmission of energy of sunlight passing through the insulating glass unit between summer and winter, of at least about 40%.

[00125] In addition to the elements of any of the nine previous paragraphs, in some embodiments, the gradual dimming from sunlight may include reducing the amount of energy of sunlight passing through the glass unit by up to about 70% in the summer, and providing at least 20- percentage transmission of sunlight in winter.

[00126] In addition to the elements of any of the 10 previous paragraphs, in some embodiments, the first conductive film may be a transparent conductive sputter coating.

[00127] In addition to the elements of any of the 11 previous paragraphs, in some embodiments, the first conductive film may be a low-e coating.

[00128] In addition to the elements of any of the 12 previous paragraphs, in some embodiments, the second conductive film may be a conductive thin film coating.

[00129] In addition to the elements of any of the 13 previous paragraphs, in some embodiments, the second conductive film may be a conductive thin film coating containing Al.

[00130] In addition to the elements of any of the 14 previous paragraphs, in some examples, the polymeric material may be polyethylene naphthalate (PEN).

[00131] In some embodiments, a method for manufacturing an insulating glass unit is provided. The method includes providing first and second substrates, each having inner and outer major surfaces; obtaining a first conductive film directly or indirectly on the inner major surface of the first substrate; obtaining a dielectric or insulating film directly or indirectly on the first conductive film; placement adjacent to a dielectric or insulating film of a shutter comprising a polymeric material holding a second conductive film, wherein the polymeric material is configured to be pulled out when used to perform the function of the closed position of the shutter and retracted to perform the function of the open position of the shutter, and the shutter further includes a plurality of holes passing through at least a portion of the polymeric material, and holes in the glass unit are not visible to the naked eye and have a size, shape and location, allowing to form a passive shading element, providing for the glass unit smooth darkening from sunlight when the polymeric material is pushed to the closed position of the shutter; electrically connecting the first and second conductive films to the power supply, wherein the first conductive film, the dielectric or insulating film, and the shutter at least partially form a dynamic dimming screen capable of being controlled by the power supply to selectively set the electrical potential difference and, accordingly, transfer of polymeric material between the open and closed positions of the shutter; and connecting the first and second substrates to each other essentially in parallel and at some distance from each other by means of a separation system in such a way that the inner surfaces of the first and second substrates face each other in the manufacture of an insulating glass unit, and a gap is formed between them, while dynamic the dimming screen is located between the first and second substrates in the gap.

[00132] In addition to the elements of the previous paragraph, in some embodiments, less than 50% of the polymeric material can be removed when forming holes.

[00133] In addition to the elements of any of the two previous paragraphs, in some embodiments, the holes may have a diameter or maximum dimension equal to the thickness of the polymeric material.

[00134]

[00135] In addition to the elements of any of the previous three paragraphs, in some embodiments, the gradual dimming from sunlight can lead to a difference in the transmission of the energy of sunlight passing through the glass unit between summer and winter, of at least about 40%.

[00136] In some embodiments, a method for manufacturing an insulating glass unit is provided. The method includes the presence of first and second substrates, each having an inner and outer major surfaces, with the inner major surface of the first substrate facing the inner major surface of the second substrate. The first conductive film is formed directly or indirectly on the inner main surface of the first substrate, and a dielectric or insulating film is placed directly or indirectly on the first conductive film. The shutter is placed adjacent to the dielectric or insulating film, the shutter including a polymeric material holding the second conductive film, the polymeric material being retractable when used to perform the function of the closed position of the shutter and retracting to perform the function of the open position of the shutter, and the shutter further includes a plurality of apertures extending through at least a portion of the polymeric material, wherein the apertures in the insulating glass unit are not visible to the naked eye and are sized, shaped, and positioned to form a passive shading element that provides the insulating glass unit with smooth darkening from sunlight when the polymeric material is pulled into shutter closed position. The first and second conductive films are configured to be electrically connected to a power source, wherein the first conductive film, the dielectric or insulating film, and the shutter at least partially form a dynamic dimming screen capable of being controlled by the power source to selectively set an electrical potential difference and , respectively, the transfer of the polymer material between the open and closed positions of the shutter. The method further includes connecting the first and second substrates to each other essentially in parallel and at some distance from each other using a separation system in such a way that the inner surfaces of the first and second substrates face each other during the manufacture of the insulating glass unit, and a gap is formed between them, with In this dynamic dimming screen is located between the first and second substrates in the gap.

[00137] In some embodiments, a method for operating a dynamic dimming screen in an insulating glass unit is provided. The method includes obtaining an insulating glass unit made in accordance with the techniques described herein (for example, in accordance with any of the 20 previous paragraphs), and selectively activating a power source to move the polymeric material between the open and closed positions of the shutter.

[00138] Although the invention has been described in connection with what is currently considered the most practical and preferred embodiment, it should be understood that the invention should not be limited to the described embodiment and/or application techniques, but rather, it is considered to include various modifications and equivalent constructions covered by the spirit and scope of the appended claims.

Claims (41)

1. Double-glazed window containing: first and second substrates, each of which has an inner major surface and an outer major surface, wherein the inner major surface of the first substrate faces the inner major surface of the second substrate; a spacer system that helps to keep the first and second substrates parallel and spaced apart from each other and forms a gap therebetween; and a dynamically controlled dimming screen disposed between the first and second substrates, the dimming screen including: the first conductive film located directly or indirectly on the inner main surface of the first substrate; a dielectric or insulating film located directly or indirectly on the first conductive film; and a shutter comprising a polymeric material holding a second conductive film, wherein the polymeric material is configured to extend to perform the function of the closed position of the shutter and retract to perform the function of the open position of the shutter, and the shutter further includes a plurality of holes passing through at least a portion of the polymeric material wherein the apertures are not visible to the naked eye and are sized, shaped, and positioned to form a passive shading element that provides gradual shading from sunlight when the polymeric material is extended to the closed position of the shade; wherein the first and second conductive films are electrically coupled to a power source that is configured to control it to selectively set an electrical potential difference to appropriately move the polymeric material between the open and closed positions of the shutter. 2. A double-glazed window according to claim 1, in which 40-60% of the polymeric material is removed during the formation of holes. 3. An insulating glass unit according to any preceding claim, in which less than 50% of the polymeric material has been removed during the formation of the apertures. 4. Double-glazed window according to any preceding paragraph, in which the holes have a diameter or largest dimension equal to the thickness of the polymeric material. 5. Double-glazed window according to any preceding claim, in which the holes have a diameter or largest dimension of 10-30 microns. 6. An insulating glass unit according to any preceding claim, wherein the holes are through holes in the shading screen and extend completely through at least the polymeric material and the second conductive film. 7. An insulating glass unit according to any preceding claim, wherein the apertures extend through at least a portion of the polymeric material in a direction perpendicular to the major surface of the polymeric material formed when the polymeric material is extended to the shutter closed position. 8. An insulating glass unit according to any preceding claim, wherein the sunlight dimming comprises reflecting a first amount of solar energy when the sun is in the first position and a second amount of solar energy when the sun is in the second position. 9. An insulating glass unit according to any preceding claim, wherein the gradual shading from sunlight results in a difference in solar energy transmission through the insulating glass unit between summer and winter of at least about 40%. 10. An insulating glass unit according to any preceding claim, in which the gradual dimming from sunlight includes reducing the amount of energy of sunlight passing through the insulating glass unit by up to about 70% in summer, and providing at least 20% sunlight transmission in winter period. 11. An insulating glass unit according to any one of the preceding claims, wherein the first conductive film is a spray-applied transparent conductive coating. 12. An insulating glass unit according to claim 11, wherein the first conductive film is a low emissivity coating. 13. An insulating glass unit according to any preceding claim, wherein the second conductive film is a conductive thin film coating. 14. An insulating glass unit according to any preceding claim, wherein the second conductive film is a conductive thin film coating containing Al. 15. An insulating glass unit according to any one of the preceding claims, wherein the polymeric material is polyethylene naphthalate (PEN). 16. A method for producing a double-glazed window, including: providing first and second substrates, each having inner and outer major surfaces; obtaining a first conductive film directly or indirectly on the inner major surface of the first substrate; obtaining a dielectric or insulating film directly or indirectly on the first conductive film; placement adjacent to a dielectric or insulating film of a shutter comprising a polymeric material holding a second conductive film, wherein the polymeric material is configured to be pulled out when used to perform the function of the closed position of the shutter and retracted to perform the function of the open position of the shutter, and the shutter further includes a plurality of holes passing through at least a portion of the polymer material, and holes in the glass unit are not visible to the naked eye and have a size, shape and location, allowing to form a passive shading element, providing for the glass unit smooth darkening from sunlight when the polymer material is pulled to the closed position of the shutter; electrically connecting the first and second conductive films to the power supply, wherein the first conductive film, the dielectric or insulating film, and the shutter at least partially form a dynamic dimming screen capable of being controlled by the power supply to selectively set the electrical potential difference and, accordingly, transfer of polymeric material between the open and closed positions of the shutter; and connection of the first and second substrates with each other in parallel and at a distance from each other by means of a separating system in such a way that the inner surfaces of the first and second substrates face each other during the manufacture of an insulating glass unit, and a gap is formed between them, while a dynamic dimming screen is located between the first and second substrates in the gap. 17. The method of claim 16, wherein less than 50% of the polymeric material is removed when the holes are formed. 18. The method according to paragraphs. 16, 17, in which the holes have a diameter or largest size equal to the thickness of the polymeric material. 19. The method according to paragraphs. 16-18, wherein the gradual dimming from sunlight results in a difference in solar energy transmission through the insulating glass unit between summer and winter of at least about 40%. 20. A method for producing a double-glazed window, including: obtaining first and second substrates, each of which has an inner and outer major surfaces, wherein the inner major surface of the first substrate faces the inner major surface of the second substrate, moreover, the first conductive film is formed directly or indirectly on the inner main surface of the first substrate, and on the first conductive film is placed directly or indirectly dielectric or insulating film; moreover, the shutter is placed adjacent to the dielectric or insulating film, and the shutter includes a polymeric material holding the second conductive film, and the polymeric material is made with the possibility of extension when used to perform the function of the closed position of the shutter and retraction to perform the function of the open position of the shutter, and the shutter additionally contains a plurality of holes passing through at least part of the polymeric material, and the holes in the double-glazed window are not visible to the naked eye and have a size, shape and location that allow you to form a passive shading element that provides a smooth darkening from sunlight for the double-glazed window when the polymeric material is pulled into a closed curtain position; wherein the first and second conductive films are configured to be electrically connected to a power source, wherein the first conductive film, the dielectric or insulating film, and the shutter at least partially form a dynamic dimming screen capable of being controlled by the power source to selectively set the electrical difference potentials and, accordingly, the transfer of the polymer material between the open and closed positions of the shutter; and connection of the first and second substrates with each other in parallel and at a distance from each other by means of a separating system in such a way that the inner surfaces of the first and second substrates face each other during the manufacture of an insulating glass unit, and a gap is formed between them, while a dynamic dimming screen is located between the first and second substrates in the gap. 21. A method for operating a dynamic dimming screen in a double-glazed window, including: obtaining a double-glazed window in accordance with the method according to claim 20; and selectively activating a power source to move the polymeric material between the open and closed positions of the shutter.

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