Window unit with UV reflective coating and high contrast ratio at wide viewing angles to reduce bird collisions

Abstract

A window unit is designed to prevent or reduce bird collisions. The window unit may include a first and second substrate (e.g., glass substrates) separated from each other, where at least one of the substrates supports an ultraviolet (UV) reflective coating to reflect UV radiation so that birds can more easily see the window. The UV reflective coating is patterned, preferably, so that it does not cover the entire window unit. By making the window more visible to birds, bird collisions and bird deaths can be reduced. The UV reflective coating is designed to have high UV reflectance across a wide range of viewing angles.

Description

WINDOW UNIT HAVING A UV REFLECTIVE COATING WITH A HIGH CONTRAST RATIO AT VIEWING ANGLES GREAT FOR REDUCING BIRD COLLISIONS ICI η / 77O7 / B / YILI Field of Invention This invention relates to a window unit designed to prevent or reduce bird collisions. The window unit may include at least a first and second substrate (e.g., glass substrates) separated from each other, wherein at least one of the substrates bears an ultraviolet (UV) reflective coating to reflect UV radiation so that birds can more easily see the window. The UV reflective coating is patterned, preferably, so that it does not extend across the entire window unit. By making the window more visible to birds, bird collisions and bird deaths can be reduced. The provision of laminated substrates in the window unit is particularly advantageous for windows where birds collide, because it can further reduce bird collisions by providing an increased contrast ratio, improving durability, and enhancing processability. Background of the Invention IG window units are known in the art. See, for example, U.S. Patents Nos. 6,632,491, 6,014,872, 5,800,933, 5,784,853, 5,557,462, 5,514,476, 5,308,662, 5,306,547, and 5,156,894, which are incorporated herein by reference. An IG window unit typically includes at least a first and second substrate separated from each other by at least one spacer and / or seal. The gap or space between the separated substrates may or may not be filled with a gas (e.g., argon) and / or evacuated at a pressure lower than atmospheric pressure in different instances. Many conventional IG window units include a solar control coating (e.g., a multi-layer coating to reflect at least some infrared radiation) on an interior surface of one of the two substrates. Such IG units allow significant amounts of infrared (IR) radiation to be blocked from reaching the interior of the building (apartment, house, office building, or similar). Unfortunately, bird collisions with such windows pose a significant problem. For example, in Chicago, certain buildings (e.g., skyscrapers) are located in the flight paths of migratory birds. Birds flying along these paths repeatedly collide with them. ICI η / 77O7 / B / YILI these buildings because they cannot see the building's windows. This results in thousands of bird deaths, especially during bird migration seasons. Birds living in environments such as forest areas or parks, with buildings located in such areas, face similar problems associated with flying into buildings. Conventional methods for reducing bird collisions with windows include the use of netting, decals, or frit. However, these solutions are considered ineffective due to their aesthetic impact on architecture and / or because they don't work, as they don't make the clear glass more visible to birds. U.S. Patent No. 8,114,488 describes a window for reducing bird collisions. However, while the '488 patent window is effective in preventing / reducing bird collisions, there is room for improvement. U.S. Patent No. 9,650,290 describes an IG window unit for reducing bird collisions, as shown, for example, in Figure 1 of the prior art. The TG window unit in Figure 1 includes a first glass substrate 1 and a second glass substrate 30 that are separated from each other by at least one or more peripheral seals or spacers 15. The spacer(s) 15, other spacer(s), and / or the peripheral seal separate the two substrates 1 and 30 from each other such that the substrates are not in contact with each other, thereby defining an air gap 17 between them. The air gap 17 may or may not be filled with a gas such as argon. A solar control coating 19 (e.g., low-E coating) and a UV reflective coating 150 are provided on the same glass substrate 1. The UV reflective coating 150 is made of glass / NbOx / SiOx / NbOx / SiOx / NbOx. The NbOx can be replaced with TiOx.Unfortunately, it has been found that the UV 150 reflective coating does not provide a particularly good contrast ratio for the bird (the difference between the coated and uncoated areas of the glass) at wide viewing angles, such as 40-45 degrees. In other words, when a bird approaches the window from an angle (e.g., 40-45 degrees from normal), it has difficulty distinguishing between the coated and uncoated areas and therefore has difficulty noticing the window. This leads to a high number of severe bird collisions with windows and, consequently, significant bird injuries. In view of the above, it will be appreciated that there is a need in the technique of enhanced windows that ICI η / 77O7 / B / YILI can prevent or reduce bird collisions with these. ICI η / 77O7 / B / YILI Summary of the Invention In certain illustrative embodiments of this invention, a window is designed to prevent or reduce bird collisions. In certain illustrative embodiments, the window may comprise insulating glass (IG) or another type of window unit designed to prevent or reduce bird collisions. The IG window unit includes at least a first and second substrate (e.g., glass substrates) separated from each other, wherein at least one of the substrates bears an ultraviolet (UV) reflective coating to reflect UV radiation so that birds can more easily see the window. Optionally, a third substrate (e.g., glass substrate) may be provided, and where the third substrate is optionally provided, at least two of the substrates may be laminated together by a polymer-based laminating film.The UV-reflective coating is preferably patterned so that it does not cover the entire IG window unit. In certain illustrative embodiments of this invention, the UV-reflective coating is designed to be more visible to birds at wide viewing angles (e.g., 30–45 degrees from normal), so that birds approaching the window at such wide angles can more easily see the window and avoid serious collisions. In other words, the UV-reflective coating is designed to have a high contrast ratio (greater visible difference between the coated and uncoated areas of the glass) at such wide viewing angles. By making the window more visible to birds at such angles, bird collisions and fatalities can be reduced.Optionally, when lamination is provided, the addition of laminated substrates to the IG window can further reduce bird collisions by providing an increased contrast ratio and improved durability. The enhanced coatings of certain illustrative models in this case may or may not be used in conjunction with the laminated models described herein. By making the window more visible to birds at wider viewing angles (e.g., 30–45 degrees from normal), severe bird collisions and fatalities can be reduced. The specific UV-reflective coating(s) provided herein and / or the provision of laminated substrates is / are particularly advantageous for bird collision windows because each increases the contrast ratio of the IG window unit between areas with the UV-reflective coating and areas without it. The improved coatings have a significant impact at wider viewing angles, thus making the window more visible to birds and reducing the likelihood of bird collisions. In an illustrative embodiment of this invention, an IG window unit is provided for reducing bird collisions, comprising: a first glass substrate; a second glass substrate; wherein the first glass substrate is provided on an exterior side of the IG window unit to face outwards from a building in which the IG window unit is to be mounted; a patterned UV-reflective coating provided on the first glass substrate and on an exterior surface of the IG window unit to face outwards from a building in which the IG window unit is to be mounted; wherein the UV-reflective coating blocks at least 38% of UV radiation in at least a substantial portion of a wavelength range of 330-380 nm; wherein the UV-reflective coating comprises, moving away from the ICI η / 77O7 / B / YILI first glass substrate: a first high-index transparent dielectric layer; a first low-index transparent dielectric layer; a second high-index transparent dielectric layer; a second low-index transparent dielectric layer; and wherein the IG window unit, as viewed from the outside thereof, has a UV reflectance of at least 30% at a wavelength of 380 nm for a viewing angle of 8 degrees and a viewing angle of 45 degrees with respect to normal. In one example, a coated article is provided (e.g.(for use in a window or pendentive unit) to reduce bird collisions, comprising: a first glass substrate; a patterned UV-reflective coating on the first glass substrate; wherein the UV-reflective coating blocks at least 38% of UV radiation in at least a substantial part of a wavelength range of 330-380 nm; wherein the UV-reflective coating comprises, moving away from the first glass substrate: a first high-index transparent dielectric layer; a first low-index transparent dielectric layer; a second high-index transparent dielectric layer; a second low-index transparent dielectric layer; and wherein the coated article, as viewed from the outside thereof, has a UV reflectance of at least 30% at a wavelength of 380 nm for a viewing angle of 10 degrees and a viewing angle of 45 degrees with respect to the normal. Brief Description of the Figures Figure 1 is a cross-sectional view of an IG window unit, which may be used in certain illustrative embodiments of this invention. Figure 2 is a cross-sectional view of an IG window unit according to an illustrative embodiment of this invention. Figure 3 is a cross-sectional view of an IG window unit according to another illustrative embodiment of this invention. Figure 4 is a cross-sectional view of a coated article, including a UV reflective coating, which can be used in conjunction with the structures of any of Figures 1-3 according to certain illustrative embodiments of this invention. Figure 5 is a cross-sectional view of another coated article, which includes a UV reflective coating, which can be used in conjunction with the structures of any of Figures 1-3 according to certain illustrative embodiments of this invention. Figure 6 is a cross-sectional view of another coated article, including a UV reflective coating, which can be used in conjunction with the structures of any of Figures 1-3 according to certain illustrative embodiments of this invention. Figure 7 is a graph depicting the UV reflectance (vertical axis, % UV reflectance) of the coated article of Example 1 over a wide range of wavelengths (330-780 nm, horizontal axis), demonstrating that the coated article of this example has high UV reflectance at a viewing angle of 8 degrees (Δ curve) and an observation angle of 45, from the normal viewing angle. Figure 8 is a graph depicting the UV reflectance (vertical axis, % UV reflectance) of the coated article of Example 2 over a wide range of wavelengths (330-780 nm, horizontal axis), demonstrating that the coated article of this example has high UV reflectance at a viewing angle of 8 degrees (Δ curve) and an observation angle of 45, from the normal viewing angle. Figure 9 is a graph depicting the UV reflectance (vertical axis, % UV reflectance) of the coated article of Example 3 over a wide range of wavelengths (330-780 nm, horizontal axis), demonstrating that the coated article in this example has high UV reflectance at a viewing angle of 8 degrees (Δ curve) and an observation angle of 45, from the normal viewing angle. Figure 10 is a graph depicting the UV reflectance (vertical axis, % UV reflectance) of the coated article of Example 4 over a wide range of wavelengths (330-780 nm, horizontal axis), demonstrating that the coated article of this example has high UV reflectance at a viewing angle of 8 degrees (Δ curve) and an observation angle of 45, from the normal viewing angle. Detailed Description of the Illustrative Modalities of the Invention Referring now more particularly to the attached figures in which similar reference numbers indicate similar parts in all the various views. The difference between a bird's and a human's color vision is significant. A bird's visual receptor can be approximately 370 nm in wavelength, meaning that birds can generally see efficiently in the UV range and in at least a portion of the blue visible range. Using this difference, it is possible to develop a coating that efficiently reflects UV light (making it visible to birds) while being substantially less reflective. ICI η / 77O7 / B / YILI neutral / invisible to the human eye. Therefore, the UV coating can be designed to have essentially the same, or similar, reflectance characteristic as bare glass, so that it is substantially invisible to humans. In certain illustrative embodiments of this invention, a window is designed to prevent or reduce bird collisions with it. In certain illustrative embodiments, the window may comprise an insulating glass window (IG) unit designed to prevent or reduce bird collisions with it. The IG window unit includes at least a first (any one of 1, 30, or 31 in any of Figures 1-3) and a second (another one of 1, 30, or 31 in any of Figures 1-3) substrates (e.g., glass substrates) separated from each other, wherein at least one of the substrates bears an ultraviolet (UV) reflective coating to reflect UV radiation so that birds can more easily see the window. Optionally, a third (even another one of 1, 30, or 31 in any of Figures 2-3) substrate may be provided (e.g., a glass substrate)., glass substrate), and in cases where the third substrate is optionally provided, at least two of the substrates can be laminated together using a polymer-based laminating film 200 (e.g., of or including PVB, EVA or SGP). One or more of the substrates of. ICI η / 77O7 / B / YILI glass may or may not be heat-treated (e.g., thermally tempered). The UV 150 reflective coating preferably has a pattern, such that it is not provided across the entire IG window unit, and may optionally be provided on surface no. 1 of the IG window unit so that it is exposed to the atmosphere and is on the outermost part of the IG window unit. The pattern of the 150 coating on the glass substrate 1 may be in the form of substantially parallel stripes on the glass substrate, or it may be any other suitable pattern, such as a zigzag pattern, a dot pattern, a square pattern, a triangle pattern, or any other suitable pattern. In certain illustrative embodiments of this invention, the UV 150 reflective coating (e.g., see Figures 4-10) is designed to be more visible to birds at wide viewing angles (e.g., 30-45 degrees from normal), so that birds approaching the window at such wide angles can more easily see the window and avoid serious collisions with it. In other words, the UV 150 reflective coating is designed to have a high contrast ratio (greater visible difference between the coated and uncoated areas of the glass) at such wide viewing angles. By making the window more ICI η / 77O7 / B / YILI visible to birds at such angles, bird collisions and bird deaths can be reduced. Optionally, when lamination is provided by layer 200, the provision of laminated substrates in the IG window can further reduce bird collisions by providing an increased contrast ratio and improved durability. The enhanced UV reflective coatings 150 (e.g., see Figures 4-10) can be used on any of the window structures in Figures 1-3 in various illustrative embodiments of this invention. Therefore, the enhanced UV reflective coatings 150 of certain illustrative embodiments of this case may or may not be used in conjunction with the laminated embodiments of the present description. Therefore, certain illustrative modalities make the UV 150 reflective coating more visible to birds. The conventional five-layer coatings of U.S. Patent No. 9,650,290 (e.g., glass / NbOx / SiOx / NbOx / SiOx / NbOx) have poor bird visibility at angles. The UV reflective coatings described herein are improved to have a higher contrast ratio (coated vs. uncoated glass) at angles (e.g., 30-45 degrees relative to normal) for improved bird visibility (e.g., see Figures 4-10), based on ICI η / 77O7 / B / YILI bird cone sensitivity values ​​of representative birds. For example, conventional coatings of U.S. patent no. 9,650,290 (e.g., glass / NbOx / SiOx / NbOx / SiOx / NbOx) have a contrast ratio of 1.4 at a viewing angle of 45 degrees. In certain illustrative embodiments of this case, the UV-reflective coatings according to certain illustrative embodiments of this invention (e.g., see Figures 4-10) are designed to have a higher reflective contract ratio (e.g., at least 1.6, more preferably at least 1.7, even more preferably at least 1.8, and most preferably at least 1.9) for birds at a viewing angle of 45 degrees and also, optionally, at short viewing angles such as approximately 3-8 degrees. This can be achieved, for example, with a novel UV 150 reflective coating (e.g.(See Figures 4-10) that also has low visibility to humans, so that it is also aesthetically pleasing to humans. In certain illustrative modalities, the layer thicknesses and / or the number of layers of the UV 150 reflective coating can be adjusted to achieve higher contrast ratios at angle and / or normal. By making the window more visible to birds at wide viewing angles (e.g., 30-45 degrees with ICI η / 77O7 / B / YILI (compared to the standard), severe bird collisions and bird deaths can be reduced. The particular UV 150 reflective coating(s) provided in the present description and / or the provision of laminated substrates is / are particularly advantageous for bird collision windows, because each of these increases the contrast ratio of the IG window unit between areas that have the UV 150 reflective coating and areas that do not have the UV reflective coating, where the improved coatings have a significant impact at higher viewing angles, thus making the window more visible to birds and reducing the likelihood of bird collisions. With reference to Figure 1, for example, a UV 150 reflective coating (e.g., see the Figures 4-10) according to illustrative embodiments of this invention may be provided on the outer surface of the glass substrate 1 in a patterned manner. The low-E coating 19 may be provided on the other side of the glass substrate 1, with the air gap 17 (which may be filled with a gas such as argon) being provided between the glass substrates 1 and 30 of the IG window unit. In other illustrative embodiments of this case, with reference to Figures 2-3, for example, which are laminated embodiments, a pair of separate substrates 30, 31 may be separated from each other by at least one seal and / or spacer 15. In certain illustrative embodiments, a solar control coating (e.g., a low-E coating) 19 is provided to block at least some infrared (IR) radiation and a UV reflection-blocking coating 150 (e.g., see Figures 4-10) to reflect UV radiation, to make the window more visible to birds and reduce collisions. In certain illustrative embodiments, the low-E coating 19 may have an emissivity (En) no greater than 0.10 and / or a sheet resistance (Rs) no greater than 8 ohms / square.In certain illustrative configurations, the UV 150 reflective coating can block at least 38% (preferably at least 40%, more preferably at least 55%, even more preferably at least 60%, and possibly at least 65%) of UV radiation in at least a substantial portion of the 350–420 nm range (or, alternatively, in at least a substantial portion of the 330–400 nm range). This increases the UV reflectivity of the window unit intended for commercial or residential applications, making such windows more visible to birds and thereby preventing or reducing their presence. ICI η / 77O7 / B / YILI bird collisions. The use of such coatings 150 in the present description improves the performance of the glass or window by increasing UV reflectance beyond the normal limits of uncoated plate glass. In certain illustrative embodiments, the UV reflectance / blocking coating 150 has a pattern (e.g., a grid pattern or a pattern with parallel stripes) on the window unit, as shown in Figures 1-3, which can make it even more visible to birds to reduce bird collisions. The IG window units of Figures 1-3 preferably have a visible transmission of at least approximately 30%, more preferably at least approximately 50%, more preferably at least approximately 60%, and even more preferably at least approximately 65% ​​or at least approximately 70%. However, the patterned 150 coating on the glass substrate 1 need not be used on IG window units in all applications and may instead be used in other applications such as substantially opaque gable applications, monolithic window units, and laminated window units. For example, the UV 150 reflective coating may be provided on the glass substrate 1 in a single-sided or double-sided laminated window unit, where the UV 150 reflective coating (patterned or unpatterned) is provided on one or both sides of the laminated window unit (e.g.,(for zoo applications where birds can fly on either side of the window unit, but where humans and lions are on their respective sides). For example, monolithic coated articles having only coating 150 on a glass substrate 1 may have: (a) a visible transmission of at least approximately 10%, more preferably at least approximately 50%, even more preferably at least approximately 80%, and sometimes at least approximately 85%, (b) film-side UV reflectance of at least 38% (more preferably at least 40%, more preferably at least 55%, even more preferably at least 60%, and possibly at least 65%) in areas where coating 150 is present, and (c) film-side visible reflectance of less than approximately 25%, more preferably less than approximately 20%, and most preferably less than approximately 10%.Therefore, the UV reflectance on the film side can be at least approximately 4 times greater in areas where coating 150 is present on glass 1 compared to areas where coating 150 is not present on glass 1 (more preferably, at least approximately 5 times greater, even more preferably at least approximately 8 times greater, and possibly at least 10 times greater). In Figures 2-3, the polymer-based lamination film 17 preferentially absorbs UV and may be made of or include PVB, EVA, SGP, or similar materials. Therefore, Figures 2 and 3 differ primarily in that (i) the laminated structure is provided on the inner side of the air gap 17 and the inner side of the low-E coating 19 in Figure 2, but is provided on the outer side of the air gap 17 and the low-E coating 19 in Figure 3, and (ii) Figure 3 provides a structure that allows for two single-sided coated glass substrates 1 and 30, which improves durability and facilitates production processing by reducing the likelihood of coating damage during processing, manufacturing, and / or shipping.With regard to point (ii), in Figure 3, the glass substrate 1 is coated on only one side with UV coating 150, and the glass substrate 30 is coated on only one side with low-E coating 19 during the manufacturing process (the lamination film 200 is an interlayer for lamination / adhesion purposes and is not a film deposited by vacuum metallization or otherwise applied to a substrate surface). In contrast, the modality in Figure 2 requires that both sides of the glass substrate 1 be coated. ICI η / 77O7 / B / YILI may be coated, one side with UV coating 150 and the other side with the low-E coating, which may increase the risk of damage during processing, shipping, and / or handling. The IG window units of Figures 2-3 may include a solar control coating 19 (e.g., low-E coating) that rests on an inner side of the glass substrate 1 (Figure 2) or on an inner side of the glass substrate 30 (Figure 3). The low-E coating 19 includes one or more layers, although in many embodiments it is a multi-layer coating. The low-E coating 19 includes at least one IR-reflective layer (e.g., silver- or gold-based) sandwiched between at least the first and second dielectric layers.Since an illustrative function of low-E cladding 19 is to block (i.e., reflect and / or absorb) certain amounts of IR radiation and prevent it from reaching the interior of the building, solar control cladding 9 includes at least one IR-blocking (i.e., IR-reflective and / or IR-absorbing) layer. Examples of IR-blocking layers that may be present in cladding 19 are made of, or include, silver (Ag), nickel-chromium (NiCr), gold (Au), and / or any other suitable material that blocks significant amounts of IR radiation. Those skilled in the art will appreciate that the IR-blocking layers of low-E cladding 19 do not... ICI η / 77O7 / B / YILI do not need to block all IR radiation, but only significant amounts of it. In certain embodiments, each IR-blocking layer of the coating 19 is provided between at least one pair of dielectric layers. Illustrative dielectric layers include silicon nitride, titanium oxide, silicon oxynitride, tin oxide, and / or other types of metal oxides and / or metal nitrides. In certain embodiments, in addition to being between a pair of dielectric layers, each IR-blocking layer may also be provided between a pair of contact layers of, or including, a material such as a nickel-chromium oxide and / or nitride or any other suitable material. The illustrative low-E coatings 19 are described in U.S. patents nos. 7,267,879, 6,576,349, 7,217,461, 7,153,579, 5,800,933, 5,837,108, 5,557,462, 6,014,872, 5,514,476, 5, 935, 702, 4, 965, 121, 5, 563, 734, 6, 030, 671, 4,898,790, 5,902,505, 3,682,528, all incorporated in the present description by reference in this manner. In certain illustrative embodiments, before and / or after optional heat treatment (e.g., heat tempering and / or heat bending), the low-E 19 coating may have a sheet resistance (Rs) not greater than 8 ohms / square, more preferably not greater than 6 ohms / square, and most preferably not greater than 4 ohms / square. In certain embodiments, the low-E 19 coating may have an emissivity (En) after heat treatment not greater than 0.10, more preferably not greater than 0.07, and even more preferably not greater than 0.05 (before and / or after optional heat treatment).Clearly, the solar control coatings 19 described herein are not limited to these particular coatings, and any other suitable solar control coating capable of blocking quantities of IR radiation may be used instead. The solar control coatings 19 described herein may be deposited onto substrates 1 and / or 30 in any suitable manner, including, but not limited to, vacuum metallization, vapor deposition, and / or any other suitable technique. With reference to Figures 1-3, the IG window units include a UV 150 reflective coating to reflect significant amounts of UV radiation, thereby making the window more visible to birds. The 150 coatings can be deposited by vacuum metallization in illustrative embodiments of this invention. The UV 150 reflective coating can be, for example purposes and without limitation, any of the UV reflective coatings illustrated in Figures 4-6. This increases the UV reflectance of the window unit to make such windows more visible to birds, thereby preventing or reducing bird collisions. The use of such 150 coatings in the present description improves the performance of the glass or window by increasing UV reflectance beyond the normal limits of uncoated plate glass.In certain illustrative embodiments, the UV-reflective coating 150 is in direct contact with the glass substrate 1 on its outer surface and is not part of a low-E coating 19. In particular, there are no IR-reflective layers (e.g., silver-based, gold-based, NiCr-based, or TCO-based IR-reflective layers) in the coating 150, and there are no IR-reflective layers on the side of the substrate 1 onto which the coating 150 is provided. Instead, any low-E coating (e.g., see low-E coating 19) may be provided on the other side of the substrate 1 from the coating 150 or, alternatively, on the substrate 30. In certain illustrative embodiments, the UV-reflective coating 150 may block (e.g.absorb and / or reflect) at least 38% (more preferably at least 40%, more preferably at least 50% or 55%, even more preferably at least 60% and possibly at least 65%) of UV radiation in at least a substantial part of the 350 to 420 nm range (or alternatively, in at least a substantial part of the 330-400 nm range or,. ICI n / 77O7 / e / YIAI alternatively, in at least a substantial part of the 330-380 nm range). The UV 150 reflective coating may have a pattern (e.g., in the form of a grid or substantially parallel or non-parallel stripes, intersecting stripes, or other shapes / figures) on the surface of substrate 1, as shown in Figures 1-3, or alternatively, it may be provided continuously across substantially the entire surface of substrate 1 in other ways. For illustrative purposes, the patterned form of coating 150 may be formed as follows: A pattern (not shown) is provided on the surface of substrate 1 before coating 150 is formed, and the pattern is located in areas that will ultimately be free of coating 150. After the pattern is formed, coating 150 is continuously formed across all or substantially all of the surface of substrate 1 over the pattern.The pattern can then be removed (along with the portions of coating 150 located directly on top of it) to create a coating with pattern 150, so that coating 150 remains only on the portions of the substrate where the original pattern was not deposited. Therefore, a coating with pattern 150 can be formed. ICI n / 77O7 / e / YIAI in such a manner in illustrative modalities of this invention. The remaining 150 pattern coating is substantially invisible to the human eye, but is visible to the eyes of birds as explained above. Figures 7-10 illustrate the film-side reflection of certain illustrative embodiments of this invention across a range of wavelengths, including UV wavelengths. The high UV reflectance at different viewing angles on the left side of Figures 7-10, for the coated articles of several embodiments of this invention, demonstrates that a high reflective contrast ratio (CR(RF)) will occur for UV and possibly certain blue wavelengths, making the windows more easily visible to birds at various viewing angles, where RF is calculated from a bird's perspective. Therefore, it has been surprisingly discovered that the contrast ratio of the IG unit is significantly higher in the combination of large and small viewing angles, compared to conventional coatings, and will therefore be more visible to birds at large viewing / focusing angles and thus there will be fewer bird collisions. Figures 4-6 are cross-sectional views of various UV 150 reflective coatings that can be used on substrate 1 in the IG window unit of any of Figures 1-3 in illustrative embodiments of this invention. The glass substrate 1 can be soda-lime-silica glass or any other suitable type of glass, and can be approximately 1-10 mm thick, more preferably approximately 2-6 mm thick, in illustrative embodiments of this invention. In the embodiment of Figure 4, the UV 150 reflective coating includes transparent high-index dielectric layers 2, 4, 6, and 8. The transparent high-index dielectric layers 2, 4, 6, and 8 may be of or include a Ti oxide (e.g., TiOx). One, two, three, or all four transparent high-index dielectric layers 2, 4, 6, and 8 may be oxygen-rich, so that, for example, the Ti oxide may be represented by TiOx where x is at least 2.01, more preferably 2.01–2.25, more preferably 2.02–2.20, and more preferably 2.03–2.20. It is also possible for the Ti oxide to be TiO2 in one or more of layers 2, 4, 6, and / or 8. In certain illustrative forms, one, two, three, or all four transparent dielectric layers of high index 2, 4, 6, and 8 may have, at a length of ICI n / 77O7 / e / YIAI 360 nm wavelength, a k value less than 0.025, with higher preference less than 0.024, and with maximum preference less than 0.023, and an n value of at least 2.90, with higher preference at least 2.91 and with maximum preference at least 2.95. In certain illustrative embodiments, one, two, three or all four high-index transparent dielectric layers 2, 4, 6 and 8 may have, at a wavelength of 380 nm, a k value less than 0.0001 and an n value of at least 2.75. It has been surprisingly and unexpectedly found that designing one or more of the high-index layers to have such nyk values, such as by the oxygen-rich technique described above, reduces UV absorption and thus allows UV reflection to be increased, even at high viewing angles, to make the windows more visible to birds at large viewing angles such as 45 degrees. In certain illustrative embodiments, one, two, three, or all four transparent high-index dielectric layers (2, 4, 6, and 8) may be made of, or include, a Ti oxide doped with at least one other element such as Zr, Ce, Nb, or the like. For example, one, two, three, or all four transparent high-index dielectric layers (2, 4, 6, and 8) may be made of, or include, a Ti oxide doped such that the metal content of the layers is approximately 1–25% Zr and / or Ce, more preferably. ICI η / 77O7 / B / YILI of approximately 2–20% Zr and / or Ce, even more preferably approximately 5–15% Zr and / or Ce, with one example where the metal content of the layer is approximately 10% Zr and / or Ce (atomic percent). For example, one, two, three, or all four high-index transparent dielectric layers 2, 4, 6, and 8 can be of, or include, a Zr-doped Ti oxide (e.g., TiZrOx), which can be oxygen-rich as described above. For example, it has been surprisingly found that, in this particular coating, the addition of Zr (and / or its oxide) to TiOx helps to reduce haze and delamination, and also manufacturing costs. For example, and without limitation, any or all of layers 2, 4, 6 and / or 8 can be deposited by vacuum metallization using TiZrOx targets made of TiOx (where x can be from 1.5 to 2).0 for example) and ZrO2, where vacuum metallization can be carried out in an atmosphere that includes at least sufficient oxygen gas for the oxygen-rich characteristic, if desired. Alternatively, the transparent high-index 2 dielectric layer, for example, can be made of, or include, a Ti oxide (e.g., T1O2), a Nb oxide, or a Ti and Zr oxide (e.g., TiZrOx) that can be oxygen-rich, for example. The transparent dielectric layers of index ICI n / 77O7 / e / YIAI under layers 3, 5, and 7 may be of, or include, silicon oxide (e.g., SiO2), which may or may not be doped with other elements such as aluminum and / or nitrogen. In certain illustrative embodiments, any of the silicon oxide layers 3, 5, and / or 7 may be doped with another material such as approximately 1–8% aluminum and / or approximately 110% nitrogen. One or more of layers 2, 4, 6, and / or 8 may also be doped with another material in certain illustrative cases. An optional coating 9, of, or including, a material such as zirconium oxide (e.g., ZrCh), may also be provided. Other layers may be added to the modality of Figure 4, and it is also possible that one or more layers may be removed from the modality of Figure 4. Each of the layers 2-9 is considered transparent to visible light because each of these layers, independently, is substantially transparent to visible light (p.e.g., at least approximately 50% transparent, with greater preference at least approximately 60% or 70% transparent to visible light). The oxygen-rich characteristic of one, two, three, or all four high-index layers (2, 4, 6, and / or 8) is related to an oxygen-rich stoichiometry of the final layer. This is done to reduce absorption and increase reflectivity. ICI η / 77O7 / B / YILI in the UV (ultraviolet) range. For example, stoichiometric T1O2 is prone to high UV absorption, and this high absorption reduces reflectivity. Therefore, to provide high UV reflectivity at normal and across a wide range of viewing angles, in certain illustrative embodiments of this invention, one, two, three, or all four high-index layers 2, 4, 6, and / or 8 are provided with an oxygen-rich stoichiometry. The desirable results of this can be seen in the UV reflectance graphs illustrated in Figures 7-10. The modality of Figure 5 is the same as the modality of Figure 4 described in this description, except that layers 6-8 have been removed from the modality of Figure 4. See the previous description of layers 2-5 and 9 of the modality of Figure 5. The embodiment in Figure 6 is the same as the embodiment in Figure 4 described herein, except that layers 7-8 have been removed from the embodiment in Figure 4. See the above description of layers 2-6 and 9 of the embodiment in Figure 5. Also noteworthy is that in the embodiment in Figure 6, layer 6' may be omitted, or layer 6' may be a Ti and Zr oxide (e.g., TiZrOx), which may be oxygen-rich, or alternatively, it may be of, or include, a different material such as a Ti oxide (e.g., TiO2). The high-index transparent dielectric layers 2, 4, 6 (or 6') and 8 may have a refractive index (n) of approximately 2.15 to 2.7, more preferably approximately 2.3 to 2.6 (at 550 nm). The low-index transparent dielectric layers 3, 5 and 7 of, or including, silicon oxide may have a refractive index (n) of approximately 1.4 to 1.7, more preferably approximately 1.4 to 1.6, and most preferably approximately 1.45 to 1.55 (all refractive index n values ​​in the present description are measured at 550 nm). The transparent dielectric layers 2-9 are preferably deposited by vacuum metallization in illustrative embodiments of this invention. In certain illustrative embodiments of the embodiments in Figures 4-6 of this invention: the transparent dielectric layer 2 can be approximately 42 nm thick, more preferably approximately 817 nm thick, and most preferably approximately 10-15 nm thick; the transparent dielectric layer 3 of, or comprising, silicon oxide can be approximately 30-100 nm thick, more preferably approximately 50-70 nm thick, and even more preferably approximately 55-63 nm thick; the transparent dielectric layer 4 can be approximately ICI n / 77O7 / e / YIAI 20-60 nm thick, more preferably about 30-40 nm thick, even more preferably about 32-36 nm thick; the transparent dielectric layer 5 of, or including, silicon oxide can be about 20-130 nm thick, more preferably about 25-100 nm thick, even more preferably about 30-60 nm thick; the transparent dielectric layer 6 (or 6') can be about 20-60 nm thick, more preferably about 25-45 nm thick, even more preferably about 30-40 nm thick; the transparent dielectric layer 7 of, or including, silicon oxide can be about 30-100 nm thick, more preferably about 50-80 nm thick, even more preferably about 60-70 nm thick;The transparent dielectric layer 8 can be approximately 4–60 nm thick, more preferably approximately 5–30 nm thick, and even more preferably approximately 10–15 nm thick; and the optional transparent protective dielectric coating layer 9 of, or including, zirconium oxide can be approximately 5–60 nm thick, more preferably approximately 5–30 nm thick, and even more preferably approximately 5–20 nm thick, where an example thickness is approximately 10–11 nm. To achieve; ICI n / 77O7 / e / YIAI The desired UV reflectance and visible transmission values ​​in this description require that layer 4 be substantially thicker than layer 2. For example, in certain illustrative embodiments, layer 4 is at least approximately 10 nm thicker (more preferably at least approximately 15 nm thicker) than layer 2. Furthermore, to achieve the desired UV reflectance and visible transmission values ​​in this description, layer 6 is preferably substantially thicker than layer 8. For example, in certain illustrative embodiments, layer 6 is at least approximately 10 nm thicker (more preferably at least approximately 15 nm thicker) than layer 8. ICI n / 77O7 / e / YIAI Examples The following examples are provided for illustrative purposes, with respect to the implementation of certain non-limiting illustrative modalities of this invention. Example 1 is based on the 150 coating of Figure 4. See Figures 4 and 7. For bird deterrence, it is preferable that the UV 150 reflective coating be visible to birds in flight. The 150 coating is designed to maintain good deterrence at least up to a 45-degree angle of normal incidence, as birds fly in all directions. For angles greater than 45 degrees, a wingtip or wingtips may be in contact with the approaching glass, which can alert the bird to its presence before a hard collision occurs. With this in mind, all designs and measurements in this description control the spectral response at two angles: at a typical viewing angle of 8 degrees and also at a 45-degree viewing angle. The coating of Example 1 is shown in the following table. ICI n / 77O7 / e / YIAI Coating 150 of Example 1 Material Layer Thickness (nm) O2-rich TiO2 or TiZrOx glass 14.0 SiO2 55.6 O2-rich TiZrOx 34.9 SiO2 43.1 O2-rich TiZrOx 31.6 SiO2 66.9 O2-rich TiZrOx 10.1 ZrO2 10.0 The following optical results were obtained from the coating of Example 1, where Rf refers to the visible reflectance of the film side, T refers to the visible transmission, and Rg refers to the visible reflectance of the glass side. ICI n / 77O7 / e / YIAI And a* b* Rf 8 degrees 9.1 1.5 - 2.0 Rf 45 degrees 10.8 0.3- 1.9 T 2 degrees 88.1 1.9- -0.1 Rg 8 degrees 9.1 1.5- 1.9 This design has a slightly higher reflectivity in the visible spectrum than bare glass (9.1% vs. 8.3%), but the color remains fairly neutral and the coating is almost invisible to the human eye. Regarding the UV wavelengths visible to birds, Figure 7 is a graph representing the film-side UV reflectance (vertical axis, % UV reflectance) of the coated article from Example 1 across a wide range of wavelengths (330–780 nm, horizontal axis). As shown in Figure 7, it has been surprisingly and unexpectedly discovered that the layer stack of Example 1 yields a coated article with high film-side UV reflectance at both an 8-degree viewing angle (Δ curve) and a 45-degree viewing angle. Not only is the UV reflectance high at a substantially normal incidence (8 degrees), but it remains significant at 45 degrees. This makes the coating highly visible to birds from a wide range of viewing angles. Example 2 is also based on the 150 lining of Figure 4. See Figures 4 and 8. The lining of Example 2 is shown in the following table. ICI η / 77O7 / B / YILI Coating 150 of Example 2: Neutral Light Blue Material Layer Thickness (nm) Glass n / a O2-rich TiO2 or TiZrOx 13.5 SiO2 58.0 O2-rich TiZrOx 35.1 SiO2 39.4 O2-rich TiZrOx 35.6 SiO2 60.2 O2-rich TiZrOx 12.0 ZrO2 11.0 Example 2 has been found to have a higher UV reflectance than Example 1. The color, along with the higher UV reflectance of Example 2, makes it more visible to birds, while the light blue (see b* below) adds cosmetic value for human customers who wish to showcase the coating for aesthetic purposes. The Example 150 coating remains substantially invisible to humans, based on the optical data for Example 2 below. And a* b* Rf 8 degrees 11.7 2.6 -9.1 Rf 45 degrees 12.6 -1.3 -0.7 T 2 degrees 87.3 -1.64 2.91 Rg 8 degrees 11.2 2.5 -9.0 Regarding the UV wavelengths visible to birds, Figure 8 is a graph representing the film-side UV reflectance (vertical axis, % UV reflectance) of the coated article from Example 2 across a wide range of wavelengths (330–780 nm, horizontal axis). As shown in Figure 8, it has been surprisingly and unexpectedly discovered that the layer stack of Example 2 provides a coated article with high film-side UV reflectance at both an 8-degree viewing angle (Δ curve) and a 45-degree viewing angle. Not only is the UV reflectance high at a substantially normal incidence (8 degrees), but it remains significant at 45 degrees. This makes the coating highly visible to birds from a wide range of viewing angles. In certain illustrative embodiments, the 150 coating is designed so that the window, when viewed from the film side, has a film-side reflective b* color value of -7 to -30 (more preferably -10 to -30) to provide blue color visible to birds (111. C, 2 Obs, or Rf at the 8-degree viewing angle), to further reduce bird collisions. Example 3 is also based on the 150 lining of Figure 4. See Figures 4 and 9. The lining of Example 3 is shown in the following table. ICI η / 77O7 / B / YILI Coating 150 of Example 3: Blue XT Material Layer Thickness (nm) Glass n / a O2-rich TiO2 or TiZrOx 10.8 SiO2 62.5 O2-rich TiZrOx 32.2 SiO2 34.5 O2-rich TiZrOx 39.6 SiO2 61.7 O2-rich TiZrOx 14.7 ZrO2 11.0 Example 3 is excellent at deterring birds from all UV designs and remains virtually invisible to the naked eye under normal viewing conditions. The blue color of Example 3 is more intense than that of Example 2 (see b* values), but the reflection visible to humans is still quite low at 11.6% (compared to 8.3% for glass), as shown in the optical data for Example 3 below. And a* b* Rf 8 degrees 11.6 -0.8 -16.3 Rf 45 degrees 12.6 -2.1 -11.6 T 2 degrees 87.0 -0.6 5.0 Rg 8 degrees 11.5 -1.0 -15.8 Regarding the UV wavelengths visible to birds, Figure 9 is a graph representing the film-side UV reflectance (vertical axis, % UV reflectance) of the coated article from Example 3 across a wide range of wavelengths (330–780 nm, horizontal axis). As shown in Figure 9, it has been surprisingly and unexpectedly discovered that the layer stack of Example 3 provides a coated article that has high film-side UV reflectance at an 8-degree viewing angle (Δ curve) and a 45-degree viewing angle. Not only is the UV reflectance high at a substantially normal incidence (8 degrees), it remains significant at 45 degrees. This makes the coating highly visible to birds from a wide range of viewing angles. The UV reflectance is highest with a blue color that remains at an angle (e.g.,(45 degrees) due to the advantageous design that allows for a protrusion in the visible range of 430-500 nm while maintaining low reflectivity at higher visible wavelengths. Furthermore, the continuously decreasing slope towards near the IR prevents / reduces the coating from turning red at any reasonable viewing angle. Example 4 is based on the 150 lining of Figure 5. See Figures 5 and 10. The lining of Example 4 is shown in the following table. ICI n / 77O7 / e / YIAI Coating 150 of Example 4: Ultra Blue 5L Material Layer Thickness (nm) Glass n / a TiO2 or O2-rich TiZrOx 23.5 SiO2 60.9 O2-rich TiZrOx 33.6 SiO2 59.0 ZrO2 11.3 Example 4 is excellent for deterring birds and requires only five layers. The coating remains virtually invisible to the naked eye under normal viewing conditions; the blue color is intense, but the reflection is still quite low at 10.6% (compared to 8.3% for glass), as shown in the optical data for Example 4 below. And a* b* Rf 8 degrees 10.6 0.1 -14.1 Rf 45 degrees 11.7 -3.3 -10.2 T 2 degrees 88.6 -1.4 3.7 Rg 8 degrees 9.8 0.0 -13.4 Regarding the UV wavelengths visible to birds, Figure 10 is a graph representing the film-side UV reflectance (vertical axis, % UV reflectance) of the coated article from Example 4 across a wide range of wavelengths (330–780 nm, horizontal axis). As shown in Figure 10, it has been surprisingly and unexpectedly discovered that the layer stack of Example 4 provides a coated article with high film-side UV reflectance at both an 8-degree viewing angle (Δ curve) and a 45-degree viewing angle. Not only is the UV reflectance high at a substantially normal incidence (8 degrees), but it remains significant at 45 degrees. This makes the coating highly visible to birds from a wide range of viewing angles.The UV reflection is excellent, and the coating increases its reflection in the 430-500 nm range at an angle while maintaining low reflection at higher visible wavelengths. Example 5 is based on the 150 lining of Figure 5. See Figure 5. The lining of Example 5 is shown in the following table. Coating 150 of Example 5: Alternative Reference Value Blue 5L Material Layer Thickness (nm) Glass n / a TiO2 or O2-rich TiZrOx 22.6 SiO2 52 O2-rich TiZrOx 36 SiO2 57 TiO2 or O2-rich TiZrOx 4 ZrO2 7 Advantageously, the color shift at different viewing angles is almost nonexistent (note below the similar a* and b* reflectivity values ​​of the film sides between the 8 and 45-degree viewing angles), making it aesthetically pleasing to humans. UV reflectance is also good across the range of viewing angles. RY a* b* Rf 8 degrees 11.0 -3.0 -8.8 Rf 45 degrees 12.2 -3.3 -9.2 T 2 degrees 87.5 -0.8 2.3 Rg 8 degrees 10.9 -2.9 -8.4 It can be seen in Figures 7-10 that, in certain illustrative preferred embodiments of this invention, the IG window unit, as viewed from the outside thereof, has a UV reflectance of at least 30% (more preferably at least 40%, and most preferably at least 50%, and occasionally at least 60%) at a wavelength of 380 nm for a viewing angle of 8 degrees and a viewing angle of 45 degrees with respect to normal. It can also be seen that the IG window unit, as viewed from the outside thereof, has a UV reflectance at a wavelength of 380 nm that does not vary by more than 30% (more preferably by no more than 20%) between the viewing angle of 8 degrees and the viewing angle of 45 degrees. In an illustrative embodiment of this invention, an IG window unit is provided for reducing bird collisions, comprising: a first glass substrate; a second glass substrate; wherein the first glass substrate is provided on an exterior side of the IG window unit to face outwards from a building in which the IG window unit is to be mounted; a patterned UV-reflective coating provided on the first glass substrate and on an exterior surface of the IG window unit to face outwards from a building in which the IG window unit is to be mounted; wherein the UV-reflective coating blocks at least 38% of UV radiation in at least a substantial part of a wavelength range of 330-380 nm; wherein the ICI n / 77O7 / e / YIAI The UV reflective coating comprises, moving away from the first glass substrate: a first transparent high-index dielectric layer; a first transparent low-index dielectric layer; a second transparent high-index dielectric layer; a second dielectric layer transparent low index; and wherein the IG window unit, as viewed from the outside thereof, has a UV reflectance of at least 30% at a wavelength of 380 nm for a viewing angle of 8 degrees and a viewing angle of 45 degrees with respect to normal. The IG window unit of the immediately preceding paragraph, as viewed from the outside thereof, may have a UV reflectance of at least 40% at a wavelength of 380 nm for a viewing angle of 8 degrees and a viewing angle of 45 degrees with respect to normal, more preferably a UV reflectance of at least 50% at a wavelength of 380 nm for a viewing angle of 8 degrees and a viewing angle of 45 degrees with respect to normal, and possibly a UV reflectance of at least 60% at a wavelength of 380 nm for a viewing angle of 8 degrees and a viewing angle of 45 degrees with respect to normal. The IG window unit of either of the two preceding paragraphs, as viewed from the outside of it, may have a UV reflectance at a wavelength of 380 nm that does not vary by more than 30% between the viewing angle of 8 degrees and the viewing angle of 45 degrees, more preferably, a UV reflectance at a wavelength of 380 nm that does not vary by more than 20% between the viewing angle of 8 degrees and the viewing angle of 45 degrees. In the IG window unit of any of the three preceding paragraphs, the UV reflective coating can block (absorb and / or reflect) at least 50% of the UV radiation in at least a substantial part of a ICI n / 77O7 / e / YIAI wavelength range 330-380 nm. In the IG window unit of any of the four preceding paragraphs, the first and second high-index layers may have a refractive index of 2.15 to 2.7 (at 550 nm), more preferably a refractive index of 2.3 to 2.6 (at 550 nm). In the IG window unit of any of the five paragraphs above, the first and second low index layers may have a refractive index (n) of 1.4 to 1.7 (at 550 nm). In the IG window unit of any of the six preceding paragraphs, the first and second low-index layers may comprise a silicon oxide, and optionally may further comprise nitrogen, such that the first and second low-index layers may each comprise SiO2, silicon oxynitride, and may be doped with Al or the like. In the IG window unit of any of the seven preceding paragraphs, the first and / or second high-index layers may comprise a Ti and Zr oxide, which may be oxygen-rich, and / or may comprise TiOx where x is at least 2.01, more preferably 2.02-2.20. In the IG window unit of any of the eight preceding paragraphs, a low-E coating may be provided on one side of the first substrate opposite the side on which the UV-reflective coating is provided. In the IG window unit of any of the nine preceding paragraphs, the UV reflective coating does not contain any Ag or Au-based IR reflective layer in certain illustrative modalities. The IG window unit of any of the ten preceding paragraphs may further comprise a third glass substrate, wherein the second glass substrate may be provided between at least the first and third glass substrates; wherein the third glass substrate may be provided on an interior side of the IG window unit to face into a building in which the IG window unit is to be mounted; wherein the second glass substrate may be laminated through an inclusive polymer laminating film to the first glass substrate or the third glass substrate; wherein the first glass substrate may be located between the patterned UV reflective coating and the inclusive polymer laminating film. The IG window unit of any of the eleven preceding paragraphs may have a visible transmission of at least approximately 30%. In the IG window unit of any of the twelve preceding paragraphs, the UV reflective coating may be in direct contact with the first glass substrate. In the IG window unit of any of the thirteen preceding paragraphs, the patterned UV reflective coating can make the IG window unit have a contrast ratio of at least 1.6 (preferably at least 1.7, and even more preferably at least 1.8 or 1.9) at the 45-degree viewing angle, at the wavelength of 380 nm. The IG window unit of any of the fourteen preceding paragraphs may further include a third transparent high-index dielectric layer provided on the first glass substrate over at least the second low-index layer, and a third transparent low-index dielectric layer provided on the first glass substrate over at least the third high-index layer. A fourth transparent high-index dielectric layer may also be provided over the third low-index layer. At least two of the first, second, and third high-index layers may comprise a Ti and Zr oxide. In the IG window unit of any of the fifteen preceding paragraphs, one, two, three, or four of the high-index layers may have an oxygen-rich stoichiometry. The IG window unit of any of the sixteen preceding paragraphs may further comprise a coating comprising a zirconium oxide. The IG window unit of any of the sixteen preceding paragraphs, as viewed from the outside, may have a film-side reflective b* color value of -7 to -30 (111. C, 2), with greater preference of -10 to -30, to provide blue color visible to birds to reduce bird collisions. In the IG window unit of any of the seventeen preceding paragraphs, one, two, three or more of the high index layers may have an oxygen-rich stoichiometry. In the IG window unit of any of the eighteen preceding paragraphs, at least one of the high-index layers may comprise a Ti oxide, which is doped with approximately 1-20% (atomic %) of Zr, Ce, and / or Nb with respect to the layer's metal content. In the IG window unit of any of the nineteen preceding paragraphs, at least one of the high-index layers may have an oxygen-rich stoichiometry and comprise a Ti oxide, which is doped with approximately 1-20% (atomic %) of Zr with respect to the layer's metal content. In one example mode, a ICI n / 77O7 / e / YIAI article covered (e.g.(for use in a window or pendentive unit) to reduce bird collisions, comprising: a first glass substrate; a patterned UV-reflective coating on the first glass substrate; wherein the UV-reflective coating blocks at least 38% of UV radiation in at least a substantial part of a wavelength range of 330-380 nm; wherein the UV-reflective coating comprises, moving away from the first glass substrate: a first high-index transparent dielectric layer; a first low-index transparent dielectric layer; a second high-index transparent dielectric layer; a second low-index transparent dielectric layer; and wherein the coated article, as viewed from the outside thereof, has a UV reflectance of at least 30% at a wavelength of 380 nm for a viewing angle of 8 degrees and a viewing angle of 45 degrees with respect to the normal. The coated article of the immediately preceding paragraph may have, as viewed from the outside of it, a UV reflectance of at least 40% (with greater preference at least 50% or at least 60%) at a wavelength of 380 nm for a viewing angle of 8 degrees and a viewing angle of 45 degrees with respect to normal. ICI n / 77O7 / e / YIAI The article coated with either of the two preceding paragraphs may have, as viewed from the outside of it, a UV reflectance at a wavelength of 380 nm that does not vary by more than 30% between the viewing angle of 8 degrees and the viewing angle of 45 degrees. In the article coated with any of the three preceding paragraphs, the first and / or second high-index layers may have a refractive index of 2.15 to 2.7, with greater preference 2.3-2.6 (at 550 nm), and / or the first and second low-index layers may have a refractive index (n) of 1.4 to 1.7 (at 550 nm). In the article coated with any of the four preceding paragraphs, at least one of the first and second high-index layers may comprise a TiOx oxide where x is at least 2.01 (to be oxygen-rich). The article coated with any of the five preceding paragraphs may, as viewed from the outside, have a film-side reflective b* color value of -7 to -30 (most preferably -10 to -30) (III. C, 2) to provide blue color visible to birds to reduce bird collisions. In the coated article of any of the six preceding paragraphs, the UV reflective coating may further comprise a third transparent high-index dielectric layer provided on the first glass substrate over at least the second index layer ICI n / 77O7 / e / YIAI low and / or a third low-index transparent dielectric layer provided on the first glass substrate over at least the third high-index layer. In the coated article of any of the seven preceding paragraphs, at least one of the first and second high-index layers may comprise a Ti oxide doped with approximately 1–20% (atomic percent) of Zr, Ce, and / or Nb relative to the layer's metal content. For example, at least one of the first and second high-index layers may have an oxygen-rich stoichiometry and comprise a Ti oxide doped with approximately 1–20% (atomic percent) of Zr relative to the layer's metal content. Although the invention has been described in relation to what is currently considered the most practical and preferred embodiment, it should be understood that the invention is not to be limited to the embodiment described, but rather is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.

Claims

1. An IG window unit for reducing bird collisions, characterized in that it comprises: a first glass substrate; a second glass substrate; wherein the first glass substrate is provided on an outer side of the IG window unit to face outwards from a building in which the IG window unit is to be mounted; a patterned UV-reflective coating provided on the first glass substrate and on an outer surface of the IG window unit to face outwards from a building in which the IG window unit is to be mounted; wherein the UV-reflective coating blocks at least 38% of UV radiation in at least a substantial part of a wavelength range of 330-380 nm; wherein the UV-reflective coating comprises, away from the first glass substrate: a first transparent high-index dielectric layer; a first transparent low-index dielectric layer;a second transparent high-index dielectric layer; a second transparent low-index dielectric layer; and wherein the IG window unit, as viewed from the outside thereof, has a UV reflectance of at least 30% at a wavelength of 380 nm for both an 8-degree viewing angle and a 45-degree viewing angle with respect to normal.

2. The IG window unit of claim 1, characterized in that the IG window unit, as viewed from the outside thereof, has a UV reflectance of at least 40% at a wavelength of 380 nm for a viewing angle of 8 degrees and a viewing angle of 45 degrees with respect to the normal.

3. The IG window unit of any preceding claim, characterized in that the IG window unit, as viewed from the outside thereof, has a UV reflectance of at least 50% at a wavelength of 380 nm for both an 8-degree viewing angle and a 45-degree viewing angle with respect to the normal.

4. The IG window unit of any preceding claim, characterized in that the IG window unit, as viewed from the outside thereof, has a UV reflectance of at least 60% at a wavelength of 380 nm for both an 8-degree viewing angle and a 45-degree viewing angle with respect to the normal.

5. The IG window unit of any preceding claim, characterized in that the IG window unit, as viewed from the outside thereof, has a UV reflectance at a wavelength of 380 nm that does not vary by more than 30% between the viewing angle of 8 degrees and the viewing angle of 45 degrees.

6. The IG window unit of any preceding claim, characterized in that the IG window unit, as viewed from the outside thereof, has a UV reflectance at a wavelength of 380 nm that does not vary by more than 20% between the viewing angle of 8 degrees and the viewing angle of 45 degrees.

7. The IG window unit of any preceding claim, characterized in that the UV reflective coating blocks at least 50% of UV radiation in at least a substantial part of a wavelength range of 330-380 nm.

8. The IG window unit of any preceding claim, characterized in that the first and second high index layers have a refractive index of 2.15 to 2.7 (at 550 nm).

9. The IG window unit of any preceding claim, characterized in that the first and second high index layers have a refractive index of 2.3 to 2.6 (at 550 nm).

10. The IG window unit of any preceding claim, characterized in that the first and second low index layers have a refractive index (n) of 1.4 to 1.7 (at 550 nm).

11. The IG window unit of any preceding claim, characterized in that the first and second low-index layers comprise a silicon oxide, and may further optionally comprise nitrogen and / or aluminum.

12. The IG window unit of any preceding claim, characterized in that at least one of the first and second high-index layers comprises a TiOx oxide where x is at least 2.

01.

13. The IG window unit of any preceding claim, characterized in that both the first and second high-index layers comprise a TiOx oxide where x is at least 2.

01.

14. The IG window unit of any preceding claim, characterized in that a low-E coating is provided on one side of the first substrate opposite the side to which the UV-reflective coating is provided.

15. The IG window unit of any preceding claim, characterized in that the UV reflective coating does not contain any Ag or Au-based IR reflective layer.

16. The IG window unit of any preceding claim, further comprising a third glass substrate, characterized in that the second glass substrate is provided between at least the first and third glass substrates; wherein the third glass substrate is provided on an interior side of the IG window unit to face into a building in which the IG window unit is to be mounted; wherein the second glass substrate is laminated through an inclusive polymer laminating film to either the first glass substrate or the third glass substrate; wherein the first glass substrate is located between the patterned UV reflective coating and the inclusive polymer laminating film.

17. The IG window unit of any preceding claim, characterized in that the IG window unit, as viewed from the outside, has a film-side reflective b* color value of -7 to -30 (111. C, 2) to provide blue color visible to birds to reduce bird collisions.

18. The IG window unit of any preceding claim, characterized in that the IG window unit, as viewed from the outside, has a film-side reflective b* color value of -10 to -30 (111. C, 2) to provide blue color visible to birds to reduce bird collisions.

19. The IG window unit of any preceding claim, characterized in that the UV reflective coating is in direct contact with the first glass substrate.

20. The IG window unit of any preceding claim, characterized in that the patterned UV reflective coating causes the IG window unit to have a contrast ratio of at least 1.7 at the 45-degree viewing angle, at a wavelength of 380 nm.

21. The IG window unit of any preceding claim, characterized in that the UV reflective coating further comprises a third transparent high-index dielectric layer provided on the first glass substrate over at least the second low-index layer, and a third transparent low-index dielectric layer provided on the first glass substrate over at least the third high-index layer.

22. The IG window unit of any 70 ICI n / 77O7 / e / YIAI preceding claim, characterized in that at least two of the high index layers have an oxygen-rich stoichiometry.

23. The IG window unit of any preceding claim, characterized in that at least one of the first and second high-index layers comprises a Ti oxide, which is doped with approximately 1-20% (atomic %) of Zr, Ce, and / or Nb with respect to the metal content of the layer.

24. The IG window unit of any preceding claim, characterized in that the first and second high-index layers comprise a Ti oxide, which is doped with approximately 1-20% (atomic %) of Zr, Ce, and / or Nb with respect to the layer metal content.

25. The IG window unit of any preceding claim, characterized in that at least one of the first and second high-index layers has an oxygen-rich stoichiometry and comprises a Ti oxide, which is doped with approximately 1-20% (atomic %) of Zr with respect to the metal content of the layer.

26. The IG window unit of any preceding claim, characterized in that the UV reflective coating further comprises a coating comprising a zirconium oxide.

27. The IG window unit of any preceding claim, characterized in that at least one of the first and second high-index layers comprises an oxygen-rich oxide of TiOx where x is from 2.02 to 2.20, and wherein the at least one of the first and second high-index layers, at a wavelength of 360 nm, has a k value less than 0.025 and / or a refractive index (n) value of at least 2.

91.

28. A window unit for reducing bird collisions, characterized in that it comprises: a first glass substrate; 10 a patterned UV reflective coating provided on the first glass substrate; wherein the UV reflective coating blocks at least 38% of UV radiation in at least a substantial part of a wavelength range of 330-380 nm; 15 wherein the UV reflective coating comprises, moving away from the first glass substrate: a first high-index transparent dielectric layer; a first low-index transparent dielectric layer; a second high-index transparent dielectric layer; a second low-index transparent dielectric layer; and 25 wherein the patterned UV reflective coating causes the window unit to have a contrast ratio of at least 1.6 at each of the viewing angles of 8 and 45 degrees at a wavelength of 380 nm.

29. A coated article for reducing bird collisions, characterized in that it comprises: a first glass substrate; a patterned UV-reflective coating on the first glass substrate; wherein the UV-reflective coating blocks at least 38% of UV radiation in at least a substantial part of a wavelength range of 330-380 nm; wherein the UV-reflective coating comprises, moving away from the first glass substrate: a first high-index transparent dielectric layer; a first low-index transparent dielectric layer; a second high-index transparent dielectric layer; a second low-index transparent dielectric layer; and wherein the coated article, as viewed from the outside thereof, has a UV reflectance of at least 30% at a wavelength of 380 nm for a viewing angle of 8 degrees and a viewing angle of 45 degrees with respect to the normal.

30. The IG window unit of any of claims 28-29, characterized in that at least one of the first and second high-index layers comprises an oxygen-rich oxide of TiOx where x is from 2.02 to 2.20, and wherein the at least one of the first and second high-index layers, at a wavelength of 360 nm, has a k value less than 0.025 and / or a refractive index (n) value of at least 2.

91.

31. The coated article of any of claims 28-30, characterized in that the coated article, as viewed from the outside thereof, has a UV reflectance of at least 40% at a wavelength of 380 nm for a viewing angle of 8 degrees and a viewing angle of 45 degrees with respect to the normal.

32. The coated article of any of claims 28-31, characterized in that the coated article, as viewed from the outside thereof, has a UV reflectance of at least 50% at a wavelength of 380 nm for a viewing angle of 8 degrees and a viewing angle of 45 degrees with respect to the normal.

33. The coated article of any of claims 28-32, characterized in that the coated article, as viewed from the outside thereof, has a UV reflectance at a wavelength of 380 nm that does not vary by more than 30% between the viewing angle of 8 degrees and the viewing angle of 45 degrees.

34. The coated article of any of claims 28-33, characterized in that the first and second high index layers have a refractive index of 2.30 to 2.60 (at 550 nm), and the first and second low index layers have a refractive index (n) of 1.4 to 1.7 (at 550 nm).

35. The coated article of any of claims 28-34, characterized in that at least one of the first and second high-index layers comprises a TiOx oxide where x is at least 2.

01.

36. The coated article of any of claims 28-35, characterized in that the coated article, as viewed from the outside, has a film-side reflective b* color value of -7 to -30 (111. C, 2) to provide blue color visible to birds to reduce bird collisions.

37. The coated article of any of claims 28-36, characterized in that the coated article, as viewed from the outside, has a film-side reflective b* color value of -10 to -30 (111. C, 2) to provide blue color visible to birds to reduce bird collisions.

38. The coated article of any of claims 28-37, characterized in that the UV reflective coating further comprises a third transparent high-index dielectric layer provided on the first glass substrate over at least the second low-index layer, and a third transparent low-index dielectric layer provided on the first glass substrate over at least the third high-index layer.

39. The coated article of any of claims 28-38, characterized in that at least one of the first and second high-index layers comprises a Ti oxide, which is doped with approximately 1-20% (atomic %) of Zr, Ce, and / or Nb with respect to the metal content of the layer.

40. The coated article of any of claims 28-39, characterized in that at least one of the first and second high-index layers has an oxygen-rich stoichiometry and comprises a Ti oxide, which is doped with approximately 1-20% (atomic %) of Zr with respect to the metal content of the layer.

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