Abstract: A spirometer includes a housing, a mouthpiece coupled to the housing, and a measurement unit. The measurement unit is configured to receive air expelled by a user, and generate an electrical quantity corresponding to a peak expiratory flow or a forced expiratory volume based on the expelled air. The spirometer also includes a processing module supported by the housing, and configured to receive the electrical quantity from the measurement unit, a display coupled to the measurement unit to display an indication of the peak expiratory flow or the forced expiratory volume, and an energy harvester. The energy harvester is coupled to the measurement unit and the processing module, and is configured to receive energy from one of a group consisting of the measurement unit and an energy sensor, store the received energy in an energy storage device, and transfer the energy to the processing module.

Abstract: Assemblies for enhancing the optical quality of electronic images displayed at an electronic display layer are provided. At least one optical sheet is located adjacent to the electronic display layer within a housing. A number of tensioning subassemblies exert tensioning forces on the optical sheet. A first component of each tensioning subassembly is attached to a location along a perimeter of each optical sheet and a second component is connected to the first component and the housing.

Abstract: An assembly for an electronic display is disclosed. An optical sheet is located behind the electronic display and adjacent to a backlight. A housing for said backlight, said optical sheet, and said electronic display is provided. An aperture is positioned along the perimeter of said optical sheet. A spring assembly is connected to said aperture and is configured to exert tensioning forces on said optical sheet.

Abstract: An apparatus and method for reducing or combating bowing of an electronic display layer located behind a cover panel is provided. A rear panel is positioned behind the electronic display layer. An air pathway includes a first gas pathway between said cover panel and the electronic display layer, a cavity located between the electronic display layer and the rear panel, and a second gas pathway located behind the rear panel. The air pathway is configured to cause the pressure of air in the cavity to be lower than the pressure of air in the first gas pathway.

Abstract: A device for sealing an interface is provided. The device includes an opening for a wire to pass through the interface. A first sealing block includes a body and a first portion that extends outwardly therefrom. A concave recess is formed between two points and is sized to surround at least a first portion of the wire. A second sealing block has a body portion with a recess extending inwardly therein and is sized to surround at least a second portion of the wire. The first sealing block and the second sealing block are configured to mate with one another to provide a substantially sealed passage for the wire.

Abstract: Systems and method are disclosed which provide an inconspicuous electrical pathway between one or more electronic displays of a vehicle top unit and a power source for a vehicle. A housing for the electronic displays is mounted to a cross bar mounted to a roof of a vehicle. Festoon type wiring extends from the power source, along a black mask area of a windshield, along or through the cross bar, and to the housing. Double sided adhesive tape is positioned between said festoon wiring and a front surface of the windshield.

Abstract: Exemplary embodiments disclosed herein provide a back pan cooling assembly for an electronic display having a rear pan. A cooling back pan is preferably positioned behind the rear pan, the space between the cooling back pan and the rear pan defining a gap. A fan is positioned to cause a flow of ambient air through the gap. An electronic component for driving the electronic display may be placed in conductive thermal communication with the cooling back pan. A rear cover can be placed against the cooling back pan to define a sealed compartment which does not permit ambient air to enter. A port can be provided within the rear cover which allows ambient air to travel between the surroundings, the fan, and the gap.

Abstract: A cross bar for mounting a vehicle topper to a roof of a vehicle is provided. A center section has a rectangular cross section, a first end, and a second end. A first tapered section extends from the first end of the center section. A second tapered section extends from the second end of the center section. A longitudinal axis of the center section, the first tapered section, and the second tapered section extend primarily in the same direction.

Abstract: A system and method for monitoring air quality is disclosed. A housing for an electronic display has a first pathway which extends between an ingestion area and an exhaustion area. An air quality monitoring device is located along said pathway and has one or more sensors that measure the concentration of various gases. The air quality monitoring device has a housing with a second pathway which connects an entrance aperture to exit aperture. The entrance aperture being configured to permit a portion of the ambient air in the first pathway to enter the second pathway.

Abstract: A roof mounted vehicle topper includes an electronic display, a housing for said electronic display, and a cross bar. The housing is mounted to the cross bar which is configured for mounting to the roof of a vehicle. At least a portion of the cross bar is hollow. A power source for said electronic display is located outside of said housing. Electrical wiring extends from said power source, through the hollow portion of said cross bar, to the electronic display.

Abstract: A cross bar for mounting a vehicle topper to a roof of a vehicle has a center section with a substantially rectangular cross section. Tapered sections are attached at a proximal end to each side of the center section. Outer plates are located on the distal end of each respective tapered section. The tapered sections increase in cross sectional area from their distal end to their proximal end.

Abstract: An apparatus and method for reducing or combating bowing of an electronic display layer located behind a cover panel is provided. A rear panel is positioned behind the electronic display layer. An air pathway includes a first gas pathway between said cover panel and the electronic display layer, a cavity located between the electronic display layer and the rear panel, and a second gas pathway located behind the rear panel. The air pathway is configured to cause the pressure of air in the cavity to be lower than the pressure of air in the first gas pathway.

Abstract: An apparatus for preventing bowing of an electronic display includes a housing and a cover panel. The electronic display is located behind said cover panel, and a backlight is located behind said electronic display. A closed loop pathway for circulating gas includes a first gas pathway located between said cover panel and the electronic display, a backlight cavity located between the electronic display and the backlight, and a second gas pathway located behind the backlight.

Abstract: An assembly for an electronic display is disclosed. An optical sheet is located behind the electronic display and adjacent to a backlight. A housing for said backlight, said optical sheet, and said electronic display is provided. An aperture is positioned along the perimeter of said optical sheet. A spring assembly is connected to said aperture and is configured to exert tensioning forces on said optical sheet.

Abstract: An assembly for enhancing an image displayed on a liquid crystal display (LCD) is disclosed. The assembly comprises a housing configured to surround a backlight, an optical sheet, and an LCD. The optical sheet being located between the backlight and the LCD. The assembly further comprises a spring assembly for tensioning the optical sheet.

Abstract: A device for sealing an interface is provided. The device includes an opening for a wire to pass through the interface. A first sealing block includes a body and a first portion that extends outwardly therefrom. A concave recess is formed between two points and is sized to surround at least a first portion of the wire. A second sealing block has a body portion with a recess extending inwardly therein and is sized to surround at least a second portion of the wire. The first sealing block and the second sealing block are configured to mate with one another to provide a substantially sealed passage for the wire.