Window unit for building or structure

Abstract

The present disclosure provides a window unit for a building or structure. The window unit includes a first panel having a region transparent to at least a portion of visible light. The window unit also includes a second panel having an area transparent to at least a portion of visible light. The window unit also includes a spacer separating the first panel from the second panel. The spacer surrounds a space between the first panel and the second panel. A first edge region of the first panel extends beyond a projection of a perimeter of the spacer in a surface normal direction of the first panel. The window unit also includes a housing containing at least one electrical or electronic component that is indirectly or directly electrically coupled to at least one other electrical component disposed within the window unit. The housing is disposed at or near the spacer and at least partially within a projection of a perimeter of the first edge region of the first panel in a surface normal direction of the first panel.

Description

Technical Field

[0001] The present disclosure relates to a window unit for a building or structure, and more particularly, to a window unit including electronic and / or electrical components such as solar cells. Background Art

[0002] Buildings such as office buildings, high-rise residences, and hotels use a large number of exterior window panels and / or curtain walls including glass panels.

[0003] Such glass panels receive a large amount of sunlight, causing the indoor space to heat up, thus requiring the use of air conditioners. Globally, a large amount of energy is used to operate air conditioners.

[0004] PCT International Application Nos. PCT / AU2012 / 000778, PCT / AU2012 / 000787, and PCT / AU2014 / 000814 (owned by the present applicant) disclose window units that have window glass that is transmissive to visible light but include solar cells that absorb light such as infrared radiation to generate electricity.

[0005] In addition, the windows of a building may include other electrical components, such as components that adjust the light transmittance, which generally require control electronics. Positioning the control electronics and providing electrical connections for these electronic components can be challenging.

[0006] The present invention provides a technical improvement. Summary of the Invention

[0007] In a first aspect, the present invention provides a window unit for a building or structure, the window unit comprising:

[0008] a first panel having a region that is transparent to at least a portion of visible light;

[0009] a second panel having a region that is transparent to at least a portion of visible light;

[0010] a spacer that spaces the first panel from the second panel, the spacer surrounding the space between the first panel and the second panel, and a first edge region of the first panel extending beyond the projection of the perimeter of the spacer in the direction of the surface normal of the first panel; and

[0011] a housing that contains at least one electrical or electronic component that is indirectly or directly electrically connected to at least one other electrical component disposed within the window unit;

[0012] wherein the housing is disposed at or near the spacer and is at least partially disposed within the projection of the perimeter of the first edge region of the first panel in the direction of the surface normal of the first panel.

[0013] The housing can be arranged entirely within the projection of the first edge region of the first panel in the surface normal direction of the first panel, which facilitates the use of the window unit as an insulating glass unit (IGU) with standard dimensions and installation requirements.

[0014] The second panel can have substantially the same extension as the first panel and can form a recess between the first edge region, the spacer, and the edge region of the second panel. The housing can be arranged at least mostly or entirely within the recess and can be at least mostly embedded in butyl or the like. The window unit can have a "flush" edge portion, which further facilitates the use of the window unit as an insulating glass unit (IGU) with standard dimensions and installation requirements.

[0015] The window unit can include other electrical components. The other electrical components can be located, for example, at the surface of the first panel or the second panel.

[0016] In one embodiment, the other electrical components are provided in the form of at least one solar cell bank arranged along at least one edge of the first panel.

[0017] The electrical components contained in the housing can include, for example, diodes and a battery or capacitor arrangement for storing the electricity generated by at least one solar cell bank. Additionally, the electrical components contained in the housing can include control electronics for controlling the electrical components of the window unit. The electrical components can also include electrical leads or can be provided in the form of electrical leads and can include or not include additional electrical or electronic components. The electrical components can also include electronic components such as a battery charge controller, a voltage regulator, and other controllers for controlling the functions of the window unit.

[0018] The window unit can include a first electrical coupling for coupling other electrical components (such as at least one solar cell bank) to the electrical components contained in the housing. The first electrical coupling can include, for example, electrical leads. Additionally, the window unit can include a second electrical coupling for coupling the electrical components to at least one other electrical component external to the window unit. The second electrical coupling can include a pin or a socket. The second electrical coupling can also include a wireless connection, such as a WIFI or Bluetooth connection, etc.

[0019] The first panel may include a first component panel portion and a second component panel portion, and the first component panel portion and the second component panel portion are joined together in a manner that avoids an air gap between the first component panel portion and the second component panel portion. At least one solar cell pack may be disposed between the first component panel and the second component panel. The first panel and the second panel may be joined together in a manner that forms a laminated structure. Adhesives may be used for the joining. In one embodiment, the refractive index of the adhesive is at least approximately the same as the refractive index of the material of the first component panel and / or the second component panel portion, which may be, for example, glass or a suitable polymeric material.

[0020] The window unit may include at least one solar cell pack, and the first component panel and the second component panel portion may sandwich the at least one solar cell pack therebetween. The joining of the first component panel portion and the second component panel portion that sandwiches the at least one solar cell pack may be achieved by polyvinyl butyral (PVB). The at least one solar cell pack may be disposed between PVB sheets. In this embodiment, the bonding may be performed as follows. First, the PVB sheet may be disposed between the first component panel portion and the at least one solar cell pack. The joining of the at least one solar cell pack and the first component panel portion may be achieved by applying heat to the PVB material sheet. An additional PVB material sheet may be disposed above the at least one solar cell pack and the spacer. Another (thicker) PVB sheet may be disposed on the area of the first component panel portion where no solar cell and no spacer are disposed. Then, the second component panel portion may be disposed on the exposed surface of the PVB sheet, and the second component panel portion may be joined to the exposed surface of the PVB sheet by applying additional heat such that a laminated structure is formed to sandwich the solar cell between the first component panel portion and the second component panel portion.

[0021] The first coupling element of the housing may include an electrical lead, such as a substantially flat wire or strip, which makes electrical contact with at least one solar cell pack. A portion of the substantially flat wire or strip may be directed towards the at least one solar cell pack and passed through or into the PVB material between the first component panel portion and the second component panel portion.

[0022] The spacer may be part of a spacer structure that includes a corner spacer portion and an elongate side portion.

[0023] The window unit may further include at least one of a suspended particle device, an electrochromic coating, an electrorheological material, a liquid crystal device, a polymer dispersed liquid crystal (PDLC) material, and an electrophoretic material. The electrical and electronic components may include a controller for controlling at least one of the suspended particle device, the electrochromic coating, the electrorheological material, the liquid crystal device, or the polymer dispersed liquid crystal (PDLC) material, and the electrophoretic material.

[0024] The first major surface of the first component panel portion may be parallel to the first major surface of the second component panel portion, and the surface area of the first major surface of the second panel may be smaller than the area of the first major surface of the first component panel portion, whereby the first component panel portion and the second component panel portion are arranged such that: the projection of the first component panel portion along the surface normal of the first component panel portion extends beyond the perimeter of the second component panel portion. The first major surface of the second component panel portion may face the spacer, and the electrical leads for electrically connecting at least one solar cell bank to the electrical components contained in the housing may be oriented around the edge of the second component panel portion. Since the edge of the first component panel portion protrudes beyond the edge of the second component panel portion, the electrical leads are thus protected. The electrical leads may be embedded in a butyl layer or the like forming the main seal of the window unit.

[0025] In one embodiment, the window unit is a self-powered unit that does not necessarily require external wiring. In this embodiment, the window unit may include, for example, blinds or other electrical components that are powered by the electricity generated by at least one set of solar cells.

[0026] At least one solar cell bank may include bifacial solar cells having opposite first and second surfaces, each surface having regions capable of absorbing light to generate electricity, and the solar cells are arranged such that: in use, the first surface is oriented to receive light from the light incident direction, and the second surface receives light from the direction opposite to the incident direction. The solar cells in at least one solar cell bank may be arranged in an overlapping relationship, such as in a shingle arrangement. In addition to the spacer, a housing may be provided. The housing may be arranged to be separated from but adjacent to the spacer.

[0027] In a second aspect, the present invention provides a window unit for a building or structure, the window unit comprising:

[0028] A first panel having a region that is transparent to at least a portion of visible light;

[0029] A second panel having a region that is transparent to at least a portion of visible light;

[0030] A housing containing at least one electrical or electronic component and electrically connected indirectly or directly to at least one other electrical component;

[0031] Wherein, a first edge region of the first panel extends beyond the projection of the perimeter of the second panel in the direction of the surface normal of the first panel; and

[0032] Wherein, the housing is at least partially arranged within the projection of the first edge region of the first panel in the direction of the surface normal of the first panel.

[0033] The first panel and the second panel can be joined together in a manner that avoids an air gap between the first panel and the second panel. At least one solar cell pack can be disposed between the first component panel and the second component panel. The first panel and the second panel can be joined together in a manner that forms a laminated structure.

[0034] A portion of the second panel can be disposed between the housing and the first panel.

[0035] The window unit can further include a third panel and a spacer that spaces the third panel apart from the second panel.

[0036] The housing can be separated from the spacer and can be arranged to be spaced apart from but adjacent to the spacer.

[0037] In an embodiment, the housing is located at or near an edge of the first panel between opposite corners of the first panel. In an embodiment, the housing is located at or near a corner of the first panel such that two sides of the housing are located at or near adjacent edges of the first panel.

[0038] The present invention will be more fully understood from the following description of specific embodiments thereof. The description is provided with reference to the accompanying drawings. Description of the Drawings

[0039] Figure 1 is a schematic top view of components of a window unit according to an embodiment of the present invention;

[0040] Figure 2 is taken through Figure 1 plane A shown;

[0041] Figure 3 is along Figure 2 the arrow direction of Figure 1 a schematic side view of an edge portion of components of the window unit shown;

[0042] Figure 4 is an exploded view of components of a window unit according to an embodiment of the present invention;

[0043] Figure 5 is a schematic top view of components of a window unit according to an embodiment of the present invention; and

[0044] Figure 6 is a schematic top view of components of a window unit according to an embodiment of the present invention. Detailed Description

[0045] First, referring to Figure 1, a window unit according to an embodiment of the present invention will now be described. The window unit 100 may be provided, for example, in the form of a building window, a skylight, a vehicle window, or any other structure that generally includes a window.

[0046] As Figure 1 shown, the window unit 100 includes a first panel 102 and a second panel (also not shown) spaced apart by a spacer (not shown). The first panel 102 and the second panel are transparent or transmissive to at least a portion of visible light. The window unit 100 also includes a solar cell pack 106. The window unit 100 may be provided in the form of an insulating glass unit (IGU) and may include a frame (not shown).

[0047] The window unit 100 includes a housing for containing electrical or electronic components. A description of the housing will be given below with reference to Figures 2 to 6 According to an embodiment, the window unit 100 includes the electrical and electronic components required for the operation and control of the device. The electrical and electronic components are located in the housing 116, which also includes external electrical connectors and feedthroughs. The housing 116 contains at least one electrical or electronic component that is indirectly or directly electrically coupled to at least one other electrical component arranged within the window unit.

[0048] The window unit 100 may include additional devices that may operate using the power generated by the solar cell 106. For example, the window unit 100 may include devices or systems such as blinds, curtains, air dampers, fans, sensors, electrochromic layers, motors, or pumps.

[0049] Figure 2 is a side view of a corner portion of the window unit 100, Figure 3 is a schematic side view of the window unit 100 as seen in the direction of the arrow in Figure 2 . The same components are denoted by the same reference numerals. Figure 2 and Figure 3 show the first panel 102 and the second panel 104 spaced apart by the spacer 108. The spacer 108 may include, for example, an aluminum extrusion and surrounds the space between the first panel 102 and the second panel. In this embodiment, the first panel 102 and the second panel 104 include ultra-low iron glass. In one embodiment, in addition to the spacer 108, a housing 116 is provided, and the housing 116 is arranged to be separated from but adjacent to the spacer 108.

[0050] In this embodiment, the first panel 102 includes a second component panel portion 110 and a first component panel portion 112, which are bonded together by an adhesive such as polyvinyl butyral (PVB). In one embodiment, the first component panel portion 112 and the second component panel portion 112 are bonded together in a manner that avoids an air gap therebetween. The solar cell 106 is sandwiched between the first component panel portion 110 and the second component panel portion 112 and is embedded in the PVB laminate 114.

[0051] The first component panel portion 110 and the second component panel portion 112 can be laminated together as follows. First, a PVB sheet is disposed between the first component panel portion 110 and the solar cell 106. Then, the PVB sheet is exposed to heat such that bonding of the solar cell 106 to the first component panel portion 110 is achieved. Then, an additional sheet of PVB material is disposed over the solar cell 106. Further, an additional (thicker) PVB sheet is disposed over the area of the first component panel portion 110 where the solar cell 106 is not disposed. Then, the second component panel portion 112 is bonded again to the exposed surface of the PVB sheet by applying heat such that a laminated structure is formed and the solar cell 106 is sandwiched between the first component panel portion 110 and the second component panel portion 112.

[0052] The first component panel portion 110 and the second component panel portion 112 each have main surfaces parallel to each other. In one embodiment, the second component panel portion 112 has a perimeter larger than that of the first component panel portion 110, and both the first component panel portion 110 and the housing 116 are completely disposed within the projection of the perimeter of the second component panel portion 112 in the surface normal direction of the second component panel portion 112. In other words, the surface area of the first main surface of the first component panel portion 110 is smaller than the area of the first main surface of the second component panel portion 112, whereby the first component panel portion 110 and the second component panel portion 112 are arranged such that: the projection of the second component panel portion 112 along the surface normal of the first component panel portion 110 extends beyond the perimeter of the first component panel portion 110. This can help facilitate the use of the window unit 100 as an insulating glass unit (IGU) with standard dimensions and installation requirements. In this embodiment, the second panel 104 has substantially the same extension as the second component panel portion 112, and a recess is formed between the edge portions of the first component panel portion 110 and the second component panel portion 112, the second panel 104 and the spacer 108. The housing 116 is disposed in the formed recess, and the recess is additionally filled with butyl (not shown) to form the main seal of the window unit. Thus, in this embodiment, the window unit 100 has a "flush" edge, and the solar cell pack 106, the housing containing electronic or electrical components, and the electrical connection to the solar cells are protected.

[0053] In this embodiment, the housing 116 has a height of 10 - 40 mm, a width of 10 - 20 mm, and a gap of 1 - 5 mm from the spacer 108. The gap is filled with butyl or the like. In one embodiment, the first main surface of the second component panel portion 110 faces the spacer 108, and electrical contacts 120 (flat wires, such as electrical leads) for electrically connecting at least one solar cell pack 106 to electrical components contained in the housing 116 are routed around the edge 140 of the second component panel portion 110.

[0054] In one embodiment, the solar cell pack 106 includes bifacial shingled solar cells having an effective front surface and a rear surface. The solar cell pack 106 has electrical contacts 120 (flat wires) that are routed through the PVB material and then through the butyl material and into the housing 116, where the electrical contacts are connected to additional electrical components within the housing 116. In one embodiment, the solar cell pack 106 is arranged such that: in use, the first (e.g., front) surface is oriented to receive light from the light incident direction, and the second (e.g., rear) surface receives light from the direction opposite to the incident direction. In one embodiment, the solar cells in the solar cell pack 106 are arranged in an overlapping relationship, such as in a shingled arrangement.

[0055] Figure 4 is an exploded view of the housing 116 and the components contained therein. In this embodiment, the housing 116 includes a diode 118, electrical leads 122, and a female electrical coupler 123 configured to couple to a male coupler 125 of an external electrical or electronic component. The housing 116 is configured to be coupled to the solar panel 106, and the diode 118 is a bypass diode 118. The housing 116 also includes a silicone seal 124. The housing 116 includes a body 126 having a removable cover 128 and is formed of a polymeric material.

[0056] In a variant of the embodiment, other electrical or electronic components may be included in the housing 116. For example, the housing 116 may include a battery, a capacitor arrangement for storing electrical power generated by at least one solar panel, a battery charge controller, a voltage regulator. Additionally, the electrical components contained in the housing 116 may include control electronics for other electrical components of the window unit. The electrical components may also include electronic components such as additional controllers for functions such as a battery charge controller, a voltage regulator, and control of the window unit.

[0057] The location of the housing 116 may vary according to the desired application of the window unit 100. For example, as Figure 5 shown, in one embodiment, the window unit 200 has the housing 116 disposed near or at an edge 132 between corner portions 130 of the window unit 200. In an alternative arrangement, as Figure 6 shown, in one embodiment, the window unit 200a has the housing 116a disposed at a corner portion 130a of the window unit 200a such that the housing is disposed near or at adjacent edges 132 and 143. In such an embodiment, the housing 116a has a 90° corner to match the profile of the corner portion 130a. In such an embodiment, the housing 116a may have a female connector to assist in electrically connecting the housing 116a to external electrical components.

[0058] Those skilled in the art will understand that, optionally, embodiments of the present invention may be provided in many different forms. For example, the perimeter of the second component panel portion 112 may not necessarily extend beyond the perimeter of the first component panel portion 110. Additionally, the second component panel portion 112 and the second panel 104 may not necessarily have the same extent. Furthermore, the housing 116 containing the electrical and electronic components may not necessarily be disposed entirely within the projection of the perimeter of the second component panel portion 112.

[0059] Optionally, the window unit may include any other type of solar cell, which may or may not be a bifacial solar cell and may not necessarily be sandwiched between the component panel portions. For example, the solar cell may be applied to the inner surface of the first component panel portion 110 or otherwise disposed between the first component panel portion 110 and the second panel 104. Additionally, the window unit may not include any solar cells, but may include another electrical component (such as a blind) into the window unit, which may be disposed, for example, in the space between the first component panel portion 110 and the second panel 104.

[0060] Furthermore, the window unit may also include one or more of a suspended particle device, an electrochromic coating, an electrorheological material, a liquid crystal device, a polymer dispersed liquid crystal (PDLC) material, and an electrophoretic material, which may be arranged to adjust the transmittance of another optical property of the window unit. The housing may include a controller for controlling the device or coating. For example, the suspended particle device, the electrochromic coating, the electrorheological material, the liquid crystal device, the polymer dispersed liquid crystal (PDLC) material, and the electrophoretic material may be disposed between the first component panel portion 110 and the second component panel portion 112.

[0061] In one embodiment, the window unit 100 / 200 / 200a may include one or more housings 116. For example, a first housing may be disposed on one side of the window unit 100 / 200 / 200a, and a second housing may be disposed on the other side of the window unit 100 / 200 / 200a. One housing may include a positive terminal, and the other housing may include a negative terminal. The housing having the positive terminal may be arranged adjacent to the housing having the negative terminal. The housing having the positive terminal may be disposed distally from the housing having the negative terminal, such as on opposite sides or adjacent sides of the window unit 100 / 200 / 200a. The housing having the positive terminal may be disposed at or towards a corner of an edge of the window unit 100 / 200 / 200a, and the housing having the negative terminal may be disposed at or towards another corner of the same edge of the window unit 100 / 200 / 200a.

[0062] In one embodiment, the window unit 100 / 200 / 200a is a self-powered unit that does not necessarily require external wiring.

[0063] In the following claims and the foregoing specification, unless the context requires otherwise by reason of express language or necessary implication, the word "comprise" or variations such as "comprises" or "comprising" are used in an inclusive sense, i.e., to specify the presence of the stated features in the various embodiments of the present disclosure, but not to preclude the presence or addition of further features.

[0064] It should be understood that if any prior art documents are cited herein, such citation does not constitute an admission that such document forms part of the common general knowledge in the art in Australia or any other country.

[0065] Modifications and variations that are obvious to persons skilled in the art are to be considered within the scope of this disclosure.

Claims

1. A window unit for a building or structure, the window unit comprising: A first panel having an area that is transparent to at least a portion of visible light; A second panel having an area that is transparent to at least a portion of visible light; A spacer that spaces the first panel from the second panel, the spacer surrounding the space between the first panel and the second panel, a first edge region of the first panel extending beyond a projection of a perimeter of the spacer in a direction normal to a surface of the first panel; And A housing that contains at least one electrical or electronic component, the electrical or electronic component being indirectly or directly electrically coupled to at least one other electrical component disposed within the window unit; Wherein the housing is disposed at or near the spacer and is at least partially disposed within a projection of a perimeter of the first edge region of the first panel in the direction normal to the surface of the first panel.

2. The window unit according to claim 1, wherein, The housing being entirely disposed within a projection of the first edge region of the first panel in the direction normal to the surface of the first panel facilitates use of the window unit as an insulating glass unit (IGU) having standard dimensions and installation requirements.

3. The window unit according to claim 1 or 2, wherein, The second panel has substantially the same extent as the first panel and a recess is formed between the first edge region, an edge region of the second panel, the spacer, and the edge region of the second panel.

4. The window unit according to claim 3, wherein, The recess is at least mostly filled with butyl or the like to form a primary seal of the window unit.

5. The window unit according to claim 3 or 4, wherein The housing is at least mostly or entirely disposed within the recess and is at least mostly embedded in butyl or the like.

6. The window unit according to any one of the preceding claims, including the at least one other electrical component.

7. The window unit according to claim 6, wherein, The at least one other electrical component is provided in the form of at least one solar cell bank disposed along at least one edge of the first panel.

8. The window unit according to any one of the preceding claims, wherein, The electrical or electronic component contained within the housing includes at least one of a diode, a battery, a capacitor arrangement, control electronics for controlling an electrical component, a battery charge controller, and a voltage regulator.

9. The window unit according to any one of the preceding claims, wherein, The electrical or electronic component includes electrical leads or is provided in the form of electrical leads.

10. The window unit according to any one of the preceding claims, including a first electrical coupling for coupling the at least one other electrical component to the electrical or electronic component contained within the housing.

11. The window unit according to any one of the preceding claims, including a second electrical coupling for coupling the electrical or electronic component to at least one other electrical component external to the window unit.

12. The window unit according to any one of the preceding claims, wherein, The first panel includes a first component panel portion and a second component panel portion, the first component panel portion and the second component panel portion being joined together in a manner that avoids an air gap between the first component panel portion and the second component panel portion.

13. The window unit according to claim 12, wherein, At least one solar cell bank is disposed between the first component panel and the second component panel.

14. The window unit according to claim 12 or 13, wherein, The first major surface of the first component panel portion is parallel to the first major surface of the second component panel portion, and the surface area of the first major surface of the second panel is smaller than the area of the first major surface of the first component panel portion. Thus, the first component panel portion and the second component panel portion are arranged such that: the projection of the first component panel portion along the surface normal of the first component panel portion extends beyond the perimeter of the second component panel portion.

15. The window unit according to claim 14, wherein, The first major surface of the second component panel portion faces the spacer, and electrical leads for electrically connecting the at least one solar cell pack to the electrical components contained in the housing are oriented around the edge of the second component panel portion.

16. The window unit according to any one of the preceding claims, comprising at least one of a suspended particle device, an electrochromic coating, an electrorheological material, a liquid crystal device, a polymer dispersed liquid crystal (PDLC) material, and an electrophoretic material.

17. The window unit according to any one of the preceding claims, wherein, The window unit is a self-powered unit that does not necessarily require external wiring.

18. The window unit according to claim 7 or any one of claims 8 to 17 dependent on claim 7, wherein, The at least one solar cell pack includes bifacial solar cells having opposite first and second surfaces, each of the first and second surfaces having regions capable of absorbing light to generate electricity, and the solar cells are arranged such that: in use, the first surface is oriented to receive light from an incident direction, and the second surface receives light from a direction opposite to the incident direction.

19. The window unit according to claim 18, wherein, The solar cells in the solar cell pack are arranged in an overlapping relationship, such as in a tile-like arrangement.

20. The window unit according to any one of the preceding claims, wherein, The housing is provided in addition to the spacer, and wherein the housing is arranged to be separated from but adjacent to the spacer.

21. A window unit for a building or structure, the window unit comprising: a first panel having a region that is transparent to at least a portion of visible light; a second panel having a region that is transparent to at least a portion of visible light; a housing containing at least one electrical or electronic component and being indirectly or directly electrically connected to at least one other electrical component; wherein a first edge region of the first panel extends beyond the projection of the perimeter of the second panel in the direction of the surface normal of the first panel; and wherein the housing is at least partially arranged within the projection of the first edge region of the first panel in the direction of the surface normal of the first panel.

22. The window unit according to claim 21, wherein, The first panel and the second panel are joined together in such a way as to avoid an air gap between the first panel and the second panel.

23. The window unit according to claim 22, wherein, At least one solar cell pack is arranged between the first component panel and the second component panel.

24. The window unit according to any one of claims 21 to 23, further comprising a third panel and a spacer that spaces the third panel apart from the second panel, and wherein, The housing is separated from the spacer, and the housing is arranged to be spaced apart from but adjacent to the spacer.

25. The window unit according to any one of claims 1 to 24, wherein, The housing is located at or near an edge of the first panel between opposite corners of the first panel.

26. The window unit according to any one of claims 1 to 24, wherein, The housing is located at or near a corner of the first panel such that two sides of the housing are located at or near adjacent edges of the first panel.

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