The present invention relates to termination points for wiring systems and, more particularly to a wall plate assembly that interfaces between video signal sources generated in one format and a wiring system that conveys the signals to one or more receivers configured to accept an HDMI-compatible, DVI-compatible or VGA-compatible video format.
Digital video transmission—which is based on transmission minimized differential signals (TMDS)—has several demonstrated performance advantages over transmission of the same content in the analog domain. One significant advantage is the pixel-for-pixel image mapping and attendant increase in resolution and color accuracy possible when a digital signal remains in the digital domain between a digital source and display.
One popular way to convey uncompressed digital video signals is through a high-definition multimedia interface (HDMI) that is presently available in the high definition consumer electronics market via digital televisions, personal computers (PCs), digital-video-disc (DVD) players, Blu-ray disc players, game consoles and digital-set-top boxes. One beneficial aspect of HDMI is that it is configured as a single cable device, providing efficient, compact structure. Cable connectors employing HDMI protocols have particular size, shape and functional attributes; in fact, there are several HDMI connector types, including Type A, Type B, Type C, Type D and Type E, each with its own size and number of pins. For example, a Type A connector commonly found on high-definition digital televisions has 19 pins and is 13.9 mm wide and 4.45 mm high.
Digital-visual-interface (DVI) is another video signal transmission format present in computer systems, as well as in numerous consumer electronics systems. As with HDMI, DVI employs a particular connector configuration, including number of pins (29 versus HDMI Type A's 19) and signal-carrying capability.
Video-graphics-array (VGA) provides analog signal connectivity, and is especially prevalent in legacy computers (i.e., laptops, PCs) and liquid crystal display (LCD) monitors. In some forms, VGA is compatible with DVI connectors and signals.
The DisplayPort digital signal protocol is based on small packetized digital data transmission using low-voltage differential signaling (LVDS) capable of being conveyed over inexpensive twisted-pair copper cables at varying data throughput levels. In this regard, DisplayPort is similar to HDMI, even though it possesses more than twice the bandwidth of HDMI (i.e., 21.6 Gbit/s as opposed to HDMI's 10.2 Gbit/s). Display Port was created as a standard according to the Video Electronics Standards Association (VESA) in an attempt to alleviate concerns over (among other things) bandwidth and encryption/security associated with DVI and HDMI. Like HDMI, DisplayPort involves the use of a single cable for digital video transmission that can be employed on a suitably-configured television, PC or related electronic device. The DisplayPort standard provides specifications of connectors, cables and data communication protocols used in conveying its signals. As such, its signal is not compatible with (among others) DVI or HDMI, although passive adapter devices may be used in some circumstances (i.e., ports configured to operate in so-called “dual-mode” configurations) to achieve at least some degree of signal converting to permit LVDS to TMDS transformations.
Significantly, each of the transmission protocols discussed above may employ different connectors or related structure such that a consumer may be faced with trying to connect disparate devices through incompatible formats. This problem is compounded by the fact that various legacy products in both the computer and high definition consumer electronics markets employ (in addition to the aforementioned VGA) one or more of the HDMI, DVI or DisplayPort connection features. Any attempt at reconciling the differing ways these signals are generated and coupled to other devices (especially in light of the increasingly evanescent distinctions between computers and high definition consumer electronics) is going to introduce significant increases in overall system layout complexity. For example, it may become necessary to provide separate transmitters configured for each signal format.
The problems discussed above are overcome by the device of the present invention, which according to a first aspect thereof integrates an interchangeable connection into a wall plate assembly to permit HDMI, DVI or VGA interfaces with a DisplayPort signal. According to a first aspect of the invention, a wall plate assembly includes a wall plate defining a face on which one or more signal interfaces extend outward. The inclusion of a face may be from an integral formation of a surface within the wall plate, or from the attachment of a separate generally planar surface to the wall plate. The wall plate further includes a plurality of bracket tabs integral to the wall plate. A circuit board is coupled to a wall plate and in some embodiments is situated behind the wall plate. The signal interface is electrically connected to the circuit board. In some embodiments, the wall plate assembly includes a cable lead that has a proximal end and a distal end. The wall plate assembly further includes a housing that is engageable with the wall plate. The housing comprises a plurality of mating tabs integral with the housing, independently compressible with respect to the housing, and alternatively engageable with the plurality of mating tabs.
The system of the present invention will provide a simple solution for (among other things) residential and commercial digital video transfer, regardless of the connection configurations of the source and receiver devices. Upon connection of a cable lead to a signal source, the signal carried from the source is conveyed to a receiver (such as a monitor, television, computer screen or the like) through the premise wiring and the wall plate assemblies of the present invention. In the present context, a signal source need not be the location where the signal is generated, but may also include conduit (for example, in the form of electrically conductive wires, cables or the like) that conveys the signal from an originating point to the wall plate assembly. Usage of the term herein will be apparent from the context.
According to another aspect of the invention, a premise wiring system is disclosed that includes one or more of the interchangeable wall plate assemblies as described in the various embodiments of the present invention, and one or more wires electrically connected to these assemblies. The wiring system may include numerous such wall plate assemblies that can be connected to one another through the wires in either a point-to-point configuration or a point-to-multipoint configuration. As mentioned above, the interfaces between the HDMI, DVI or VGA signals and those of a DisplayPort signal include the necessary signal-conversion circuitry. As configured, the wiring system defines a digital video signal conversion and conveying mechanism.
According to another aspect of the invention, a method of connecting premise wiring to a wall plate assembly is disclosed. The method includes arranging at least one wire in a premise wiring system to include a quick-connect coupling at a terminus of the premise wiring system and connecting the quick-connect coupling situated on a wall plate assembly as described in the various embodiments of the present invention. The quick-connect coupling enables fast connection and disconnection with a complementary quick-connect coupling on a signal carrying wire or cable.
The following detailed description of specific embodiments of the present invention can be best understood when read in conjunction with the following drawings, where like structure is indicated with like reference numerals and in which:
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In one form, the wall plate assembly 1 further comprises a circuit board 20 coupled to the wall plate 5. For example, the circuit board 20 is such that it may generally align with the face 15 of the wall plate 5 and act as an outlet or jack for an electrical signal that may be delivered to the wall plate assembly 1 through a wiring system. The wall plate assembly 1 may also include a box or housing 50 engageable with the wall plate 5 and integral with a plurality of cantilevered mating tabs 51 that are independently compressible with respect to the housing 50. Preferably, the mating tabs 51 are selectively engageable with the bracket tabs 16 through alternating compression and decompression. Significantly, the use of the tabs 16 in bendable form helps facilitate this separation of the wall plate 5 from the housing 50 in a tool-free manner. In particular, mating tabs 51 that are integrally-formed into the housing 50 may be pushed inward on the housing 50. This allows them to pass out of an interference fit with a bracket tab 16 integral to the wall plate 5, thereby allowing easy removal or attachment of the wall plate 5 to the housing 50. Moreover, the snap-fit nature of the mating tabs 51 possess a locking ability to prevent inadvertent disconnection. Significantly, this interchangeability is accomplished without the need for tools. The bracket tabs 16 may also include a cutaway portion 17 while the mating tabs 51 further include a notch portion 52. In one particular form, the bracket tabs 16 are engaged with respective mating tabs 51 when the notch portions 52 of the mating tabs 51 are disposed within the cutaway portions 17 of the bracket tabs 16. Importantly, when an attempt is made to connect the wall plate assembly 1 of the present invention to a device that has a different signal interface (discussed in more detail below) than that of the one that presently extends through the face 15 of wall plate 5, the snap-fit nature of the engagement between tabs 16 and 17 permits rapid replacement of the wall plate 5 to ensure the proper signal interface is securely put in place within the housing 50 of assembly 1 without recourse to screwdrivers or other tools.
Wall plate assembly 1 may further include one signal interfaces (shown later) extending outward through an aperture 15A formed in the face 15 of the wall plate 5; such a signal interface is electrically connected to the circuit board 20. The signal interface is configured such that upon connection of the wall plate assembly 1 to a signal source (such as a computer (not shown)) as well as a sink device, projector or display 60, the signal interface can carry an electronic signal. In some embodiments, the signal interface is selected from a group consisting of DisplayPort, HDMI, DVI or VGA, and combinations thereof. In some embodiments, the wall plate assembly 1 inputs a DisplayPort source signal, which passes through the digital signal conversion circuitry of the circuit board 20, and outputs a signal through the signal interface from the group consisting of HDMI, DVI or VGA, and combinations thereof.
Furthermore, the mix-and-match approach (by one or more of color or termination point (also called signal interface, discussed in more detail below)) allows the use of multiple different adapter type housings 50 and related assemblies 1 that could be used as part of the present invention. For example, a DisplayPort-to-HDMI, DisplayPort-to-VGA and DisplayPort-to-DVI configuration may readily be formed and interchanged. Housing 50 may include an electromagnetic shield (not shown) to substantially enclose the circuit board 20. The present invention is configured such that when the housing 50 detaches from the wall plate 5, the internal components of assembly 1 typically stay with the wall plate 5. In any event, the housing 50 that contains the electronics—when coupled to the wall plate 5—is referred to as part of the wall plate assembly 1. In some instances (not shown), the electronics could be situated elsewhere such that they would not be mounted to any part of the wall plate assembly 1.
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The wall plate assembly 1 may additionally include a cable lead 72 that is in electrical communication with the at least one signal interface through the circuit board 20; in a preferred form, a distal end of the cable lead 72 may include a quick-connect coupling to electrically connect the signal source to the wall plate assembly 1. In the present context, the term “cable lead” defines a cable, wire, or related electrical signal-carrying member that represents either the wall plate termination to the runner cable or the flying lead termination to a runner cable. The quick-connect nature of the distal end of the cable lead 72 provides a secure and fast coupling with a mating quick-connect electrical connector of a runner cable completing a number of different functioning electrical signals, for example DisplayPort. In this manner, wall plate assembly 1 according to the present invention can be connected via runner cable to a second wall plate or a flying lead to enable relatively rapid and simple installation of a premise wiring system. In some embodiments the runner cable is a wire (as will be discussed and shown in more detail below).
In some embodiments, the length of the cable lead 72 is such that the quick-connect coupling is adjacent to the wall plate 5. In the present context, to be included within the meaning of the term “adjacent”, precise side-by-side spacing between the components is not necessary. More particularly, the term is utilized herein to distinguish the quick-connect assembly of the cable lead of the present invention from contemplated wiring systems where a length of cable coupled to a wall plate runs from the wall plate to a connector in a location displaced far enough from the wall plate to make it inaccessible to the installer, absent relocation of the installers base of operation to another room within the structure or another part of a room within the structure. In some embodiments, the wall plate assembly 1 further comprises a permanent connection between the cable lead 72 and the circuit board 20. In this embodiment, when the housing 50 is removed from the wall plate 5, the cable lead 72 stays with the wall plate 5. In some embodiments, the cable lead 72 is removably engageable with the circuit board 20 and the wall plate 5. In this embodiment, when the housing 50 is removed from the wall plate 5, the cable lead 72 stays with the housing 50. In other more particular forms, the cable lead 72 comprises a male distal end and a female proximal end, while in others, it may be just the opposite.
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As such, the present invention may be configured in a variety of ways. In one form, it may include adapters to permit a DisplayPort-originated signal to be passed through an appropriately-configured wall plate 5 on its way to an HDMI, DVI or VGA-compatible receiver. As mentioned above, in a particular form, the wall plates 5 may be of the Decora-style variety.
In yet another form, the wall plates 5 can be made to be easily (i.e., free of tools) interchangeable through the complementary tabs 16 and 51 such that the connector formed in the wall plates 5 may be swapped in and out without having to replace greater amounts of premise wiring infrastructure. Moreover, additional wall plate 5 form factors may also be used in conjunction with the present invention, including full-size wall plates, plates, double-gang wall plates and combination wall plates that could include adding VGA or other suitable connections.
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It will be appreciated that various forms of cable lead or wire 72 may be used. In one exemplary form (shown in cross-sectional view in
Premise wiring system 70 may be made up of numerous wall plate assemblies 1 that may be connected to one another through one or more of the aforementioned wires 72 in a point-to-point configuration. In other embodiments, this connection is a point-to-multipoint configuration. The wiring system 70 can be responsive to input from a digital signal source, such as a television 90, central control panel (which may be connected to a multimedia system or the like), display monitor 91 or computer 92. As shown with particularity in
A method of connecting premise wiring to a wall plate assembly 1 includes arranging at least one wire 72 in a premise wiring system 70 to include a quick-connect coupling at a terminus of the premise wiring system 70 and connecting the quick-connect coupling to a complementary quick-connect coupling quick-connect couplings 74 situated on a wall plate assembly 1. In some embodiments, the complementary quick-connect coupling 74 is connected to a cable (such as wire 72) of the wall plate assembly 1. It is contemplated that the wall plate assembly 1 of the method may comprise any of the various embodiments of the wall plate assembly 1 discussed in the present disclosure. The method may further include permanently connecting the complementary quick-connect coupling to the circuit board 20 and/or the wall plate 5. In some embodiments, the method further comprises reducing tension on the wall plate assembly 1 and the at least one wire 72 in the premise wiring system 70 by placing a strain relief device 73 between the at least one wire 72 in the premise wiring system 70 and the circuit board 20. Preferably, the method further comprises providing a housing 50 of the wall plate assembly 1 that is engageable with the wall plate 5 without the use of tools to permit rapid changing of the wall plates 5 and their signal interface-specific termination configuration that is formed in the face 15.
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Having described the invention in detail and by reference to specific embodiments thereof, it will be apparent that modifications and variations are possible without departing from the scope of the invention defined in the appended claims. More specifically, although some aspects of the present invention are identified herein as preferred or particularly advantageous, it is contemplated that the present invention is not necessarily limited to these preferred aspects of the invention. For example, it is noted that the electrical connectors, the electrical wiring, and the male and female quick-connect couplings illustrated in the figures can be presented in a variety of configurations without departing from the scope of the present invention.
This application claims priority to U.S. Provisional Application 61/745,077, filed Dec. 21, 2012, and to U.S. Provisional Application 61/779,807, filed Mar. 13, 2013.
Number | Date | Country | |
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61779807 | Mar 2013 | US | |
61745077 | Dec 2012 | US |