The present disclosure relates generally to devices for illuminating images. In some embodiments, illuminated images may be framed independently for wall hanging or display on a stand, or incorporated within or attached to furniture.
Framed images are often placed on walls and on top of furnishings. For example, artwork may be placed on a wall, a family photograph may be placed on a desk, and the like. These images may ordinarily be unlit, or lit by a light located on the same side of the image as the viewer. Nevertheless, there may be some instances where a backlit image is desired. Devices that may allow the display of a backlit image may be available. However, changing the image in these devices may be difficult and the devices themselves may not be suitable for all applications.
This Summary is provided to introduce a selection of concepts in a simplified form that are further described below in the Detailed Description. This Summary is not intended to identify key features or essential characteristics of the claimed subject matter, nor is it intended to be used as an aid in determining the scope of the claimed subject matter.
Disclosed embodiments are directed to systems providing for backlighting or illumination of images that might be provided on a transparent media. Advantageously, disclosed systems eliminate the need for incorporated framing and yet permit incorporation of controls for dimming the illumination and for timed dimming and on/off operation of the backlighting. Major components of the system, for example a light guide (and/or light guide panel), the image (such as might be provided on a transparency), and a protective cover (such as an acrylic sheet), are independently removable to facilitate changing of the image and to allow the system to be easily serviced and/or repaired.
Disclosed embodiments provide a number of other potential advantages as well. For example, a disclosed light guide provides a guide surface to assist the insertion and/or removal of the graphic medium. In addition, the guide surface maintains an electrostatic “break” or air gap as between removable elements (such as the graphic image and protective sheet) to minimize electrostatic binding of plastic components upon insertion or removal. In addition, disclosed implementations of a light guide incorporate thermal management features so as to manage and remove heat generated by light source (such as light emitting diodes LED) within an enclosure. In addition, a light guide may provide a housing that, in addition to retaining and appropriately positioning a light source, provides electrical power connection for the light source including wiring management that facilitates light guide removal, and incorporates controller electronics providing functions such as dimmer and timing for the light source as well as wireless remote control functionality. The light source may be controlled remotely and/or controlled by a panel physically connected to the light guide. Some of these and/or other features and advantages of disclosed embodiments may allow the illuminated images to be incorporated into applications that may have been impractical previously, including but not limited to, furniture, including children's beds, and other commercial and residential applications such as under-cabinet and under-counter lighting systems.
Some embodiments include a device for displaying and illuminating images. The device may include a housing including an interior portion. Access is provided to the interior portion via an opening formed in the housing. In disclosed embodiments, the device further includes a light guide, which includes a light source and a guide surface disposed on a portion of the light guide. The light guide is configured to be removably received within the housing via the opening. The device also includes an image imprinted on a graphic medium. The graphic medium is configured to be removeably received within the housing via the opening and guided via the guide surface of the light guide. The guide surface is configured to guide the graphic medium to a position wherein at least a portion of the image is viewable through an aperture formed in the housing, and at least a portion of the image is at least partially illuminated via light originating from the removable light source.
Some embodiments contemplate the integration of the above device within an article of furniture. For example, the article of furniture may include a housing having an interior portion, which is accessible via an opening formed along a portion of the housing. An image imprinted on a graphic medium is configured to be received within the housing via the opening, and such that at least a portion of the image is viewable through an aperture formed in the housing. A light guide having multiple light emitting devices, and a light guide panel configured to direct light from the multiple light emitting devices onto the image is provided. In example embodiments, the light guide is configured to be removably received within the housing via the opening, and is configured to define a guide surface. The guide surface is oriented to guide the graphic medium within the housing and retain the graphic medium in a predetermined position and orientation within the housing. The guide surface may be further configured to provide a space between at least a portion of the graphic medium and the light guide panel.
Disclosed example embodiments pertain to a light guiding device, which may be used in combination with a substantially planar light guide panel. The light guiding device includes a light guide having a light source positioned so as to direct light to the light guide panel for illumination of an image. The light guide may further include a guiding structure. The guiding structure may include a guide surface configured to retain the light guide panel at a position that is at least partially offset from the image.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the invention. The features and advantages of the invention may be realized and obtained by means of the instruments and combinations particularly pointed out in the appended claims. These and other features of the present invention will become more fully apparent from the following description and appended claims, or may be learned by the practice of the invention as set forth hereinafter.
To further clarify the above and other advantages and features of the present invention, a more particular description of the invention will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings. It is appreciated that these drawings depict only typical embodiments of the invention and are therefore not to be considered limiting of its scope. The invention will be described and explained with additional specificity and detail through the use of the accompanying drawings in which:
Available devices that allow the illumination and display of a changeable image may not be suitable for many applications. For example, changing the image in these devices is often difficult, particularly to someone who has not had practice or training in changing the image. In some instances, electrostatic attraction between a graphic medium including the image and one or more parts of the device may contribute to the difficulty in changing the image. In some instances, when an image is difficult to change, the graphic medium may be damaged or destroyed, increasing the cost—and frustration—associated with the device. Available devices may further produce undesirably heated surfaces and/or may not provide the desired operation controls for a particular application.
Embodiments of the present invention include a device for displaying and illuminating an image, examples of which are provided below, that address the problems described above. The device includes a housing having an inner portion, and a viewing aperture formed in the housing. Also included is a light guide. The light guide includes a light source, and is configured to be removably received within the housing via the opening. The light guide is also configured to provide a guide surface, as will be described in further detail below.
A graphic medium that includes an image to be displayed and illuminated by the device is inserted and removed from the housing by way of the opening. The guide surface on the light guide acts to guide the graphic medium into a predetermined position. Once positioned, the image is viewable through the viewing aperture provided in the housing, and is illuminated by light originating from the light source of the light guide.
Reference will now be made to the drawings to describe various aspects of example embodiments of the invention. It is to be understood that the drawings are diagrammatic and schematic representations of such example embodiments, and are not limiting of the present invention, nor are they necessarily drawn to scale.
The imaging device 100 allows a user to easily insert or remove the graphic medium 104a through an opening 110. Thus, the user may change the graphic medium 104a received within the imaging device 100 in order to display another image. As illustrated in
In some embodiments, the opening 110 may be formed in one or more of the surfaces of the housing 106, including a top, bottom, front, back, and/or sides of the housing 106. In some embodiments, a portion of the housing may form a hinged access. The hinged access may allow the portion of the housing to be rotated away from the remainder of the housing 106 such that an opening may be formed and the graphic panel 104b may be changed. When the graphic panel 104b is changed, the hinged access portion may be rotated back to its display position. Other configurations may be used to provide access to the housing for insertion and retrieval of the imaging device and the graphic medium, and access does not necessarily need to be via an opening formed along an edge of the housing. For example, the housing 106 having an opening 110 may be located in a larger casing and a hinged, sliding, or other connection may allow the user to move part or all of the housing out of the casing to provide access to the opening.
A control panel 116 may be used to control the operation of imaging device 100. In certain embodiments, the control panel 116 may include membrane switches, touch-screen displays, and/or other control devices. Alternately or additionally, the control panel 116 may include a wireless control device enabling remote operation with a remote control. The wireless control device may include, for example, infrared (IR) or radio frequency (including but not limited to RF, WiFi®, and/or Bluetooth®) receivers. Alternately or additionally, the control panel 116 may connect to a computer network through a wired or wireless network connection enabling remote operation over the computer network and/or internet via a computer, tablet computer, mobile phone or other device enabled to communicate over a computer network and/or the internet. In some embodiments, the control panel may contain a motion sensor devised to turn on functions of the imaging device 100 when activated by someone entering the range of the motion sensor. The motion sensor may also be devised to deactivate functions of the imaging device 100 when motion has not been detected for a specified period of time. The control panel 116 may be located at the outside and/or inside of the housing 106 or lid 112.
The control panel 116 may be removably attached to the imaging device 100. For example, the control panel 116 may be removed to facilitate changing the graphic panel 104b. In some embodiments, part or all of the control panel 116 may attach to the imaging device 100 by a length of wired connector to allow part or all of the control panel 116 to be moved freely within the length of the wired connector. In some embodiments, controls attached to the imaging device 100 may override commands from the remote controls and may allow operation of the imaging device 100 when the remote controls are lost, not operational, or otherwise not convenient to use. The controls attached to the imaging device 100 may allow a user to perform more or fewer functions than a remote control. In some embodiments, an eye 217 in the housing 106 may accommodate the passing of a signal to the wireless control device; however, it should be appreciated that an eye will not be required for certain types of signals to reach the control panel. For example, in embodiments where an RF receiver is used, a suitable RF antenna would be provided, either as a separate antenna component (such as a strip antenna, not shown), or the antenna function can be provided by a metallic portion of the light guide 222 housing 242 (discussed below).
Referring to the embodiment disclosed in
A light guide panel 224 designed to diffuse edge and/or corner lighting evenly over a face 228 of the light guide panel 224 may be made in a variety of sizes and configurations. The light guide panel 224 may be made from transparent acrylic sheets manufactured to diffuse varying amounts of light throughout the sheet. In some embodiments, the light guide panel 224 may be configured to diffuse light from multiple light guides 222 located at multiple edges and/or corners of the light guide panel 224. The diffusion values for a given location of the light guide panel 224 may be chosen so that at least one face 228 of the light guide panel 224 is uniformly illuminated when light is introduced to one or more edges and/or corners of the light guide panel 224.
Illumination of the image 102c may also be provided without a light guide panel 224. For example, the light guide 222 may be positioned so as to allow the light source 230 to provide illumination to the image 102c directly and/or by illumination reflected and/or diffused from the housing 106 or other surfaces. The light source 230 may include multiple light emitting diodes (LEDs). A power source, such as a 12 volt power source, may be utilized to power the LED light sources 230. Alternately or additionally, the light source 230 may include a fluorescent light panel, a cold cathode light panel, an electroluminescent panel, a neon tube, an incandescent bulb, and the like.
Referring to
As is shown in further detail in
In some embodiments, the light guide housing 242 promotes heat dissipation so as to remain comfortable for a user to touch when the light source 230 has been producing heat for a significant amount of time. In one embodiment, the light guide housing 242 may be constructed at least partially of aluminum or anodized aluminum to promote heat transfer. To further promote heat dissipation, a break 244 may hinder conductive heat transfer from the light source 230 to a portion of the light guide housing 242 a user may access from the opening 110. In some embodiments, the break may allow heated air to escape a hollow portion 246 that is formed in the light guide 222. In some embodiments, heated air may also be allowed to escape from the ends of the light guide 222. The light guide housing 242 may also include thin walls to create a large surface area to promote heat transfer from the light guide 222 to the atmosphere. Alternately or additionally, other heat dissipation components may be used, such as fins, ridges, other heat emitting surface areas, openings, fans, or the like.
Referring to
The graphic medium 104c may be removed and replaced with a different graphic medium as often as a user desires. In certain embodiments, the graphic medium 104c is inserted into the imaging device 200 after the light guide 222 and protective cover 220 have been received in the housing 106. Referring again to
In some embodiments, the imaging device 200 may facilitate insertion and removal of the graphic medium 104c by eliminating or reducing electrostatic buildup and attraction between the graphic medium 104c, protective cover 220 and light guide panel 224. This may be at least partially accomplished by a standoff provided by a front surface 250 of the light guide 222 and resulting gap or space 252 between the graphic medium 104c and the light guide panel 224, as is best seen in
In some embodiments, the shape and size of the light guide 222, protective cover 220 and graphic medium 104c may act together to hold these components in place when inserted inside the housing 106, as best demonstrated by
The teachings of the present disclosure may be adapted to a wide variety of applications. By way of example,
In some embodiments, the imaging device may include one or more speakers and a music player or a docking system for a portable music player for playing music or producing white noise. In certain embodiments, the control panel allows a user to control the portable music player. It should be appreciated that the volume controls for the music player may function in substantially the same way as the illumination controls for the light source. In some embodiments, the volume controls may synchronize with the illumination controls. For example, as the light source automatically reduces at a specified rate, the volume may also reduce at a specified rate to turn off before, after, or at the same time the illumination is turned off or reaches a lower, predetermined intensity. The volume controls may function independently of the illumination controls. For example, the illumination may increase gradually to wake a user and if the alarm clock function is not shut off before the light source reaches full illumination, music may turn on to ensure the user wakes.
The illumination control circuit 900 may include a wireless receiver circuit 910. The wireless control circuit 910 may include a wireless receiver 912. For example, an IR wireless receiver. The wireless control circuit 910 may receive wireless signals at the wireless receiver 912 and send converted signals to a microcontroller unit 916.
The illumination control circuit 900 may also include a control panel circuit 918. The control panel circuit 918 may include multiple switches 920. In some embodiments, the switches 920 are momentary, normally open switches. The control panel circuit 918 may include resistors 922 arranged such that a different signal is provided at the microcontroller unit 916 when each switch 920 is pressed.
The microcontroller unit 916 may be programmed to output a signal to the gate of a transistor 924. In some embodiments, the transistor 924 may be an n-channel, depletion, metal oxide semiconductor field-effect transistor (MOSFET). The signal may control the LED circuit 926 by selectively interrupting and/or allowing power to the LED circuit 926. In some embodiments, the microcontroller unit 916 may control the intensity of the light output of the LEDs by outputting a signal such that the LEDs are cycled on and off at a high frequency. The LEDs may be cycled on and off at a high enough frequency that the LEDs appear to be dimmed to a human observer. The intensity of the light output may be controlled by varying the length of time the LEDs are on compared to the length of time the LEDs are off during each on/off cycle.
The illumination control circuit 900 may include an indicator LED 914. The indicator LED 914 may provide a user with feedback about the illumination control circuit 900. For example, the LED 914 may indicate that the illumination control circuit 900 is receiving power and/or that input was received via the control panel circuit 918 or wireless receiver circuit 910.
By way of summary, disclosed embodiments are directed to an illumination system that provide a number of features and advantages over the prior art. For example, by incorporating a thermal management system (heat sink); transparency guide; electrostatic “break”; wire chase; dimmer and timer control that can be remotely operated; alternate “touch” switch; LED light strip holder; and 12 v DC electrical connection into a single, light guide, a new approach to a removable and controlled method and system of backlighting/illumination is provided. Such a system enables LED backlighting to be incorporated into applications, lighting systems and furnishings in a way heretofore impractical and/or impossible, such as a children's bed, other furniture and under-cabinet and under-counter commercial and residential lighting. Disclosed features include: (1) System design and framing methodology enabling easy removal (slidingly removable) of all elements of a backlighting/illumination system for ease of installation, change, servicing and repair; (2) “frameless” backlighting system enabling incorporation into “exterior frames”, requiring no separate addition or framed attachment of heat sink, and facilitating change of components independently; (3) unique extruded light guide panel/cap design—in function, form and size—enabling, for example, heat management and transfer of heat generated by LED (or similar) lighting in an enclosure; easy insertion/change of transparency utilizing rounded (bull-nosed) edge at insertion point of transparency to guide the transparency and provide an air gap to minimize electrostatic binding of plastic components upon insertion; incorporation of controller comprised of dimmer/timer/IR or RF (Bluetooth) receiver (for remote control) and separate membrane and/or capacitance touch control; containment in an integral “chase” of wiring from LED light strip to controller; and incorporation of wiring harness with removable plugs to facilitate light guide panel removal.
All examples and conditional language recited herein are intended for pedagogical objects to aid the reader in understanding the invention and the concepts contributed by the inventor to furthering the art, and are to be construed as being without limitation to such specifically recited examples and conditions. Although embodiments of the present inventions have been described in detail, it should be understood that the various changes, substitutions, and alterations could be made hereto without departing from the spirit and scope of the invention.
The patent application claims priority to U.S. Provisional Patent Application 61/496,997 filed Jun. 14, 2011, which is incorporated herein by reference.
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