Disclosed is a display module including a transparent display panel and a frame to fix a side of the transparent display panel, wherein the frame has a communication unit to receive data from the outside, a controller to process the received data and to output a drive command corresponding to the processed data and a display drive unit to drive the transparent display panel in response to the drive command from the controller. A display system includes a system body and a display module detachably mounted in the system body.

An airtight device includes a container and an airtight cover on the container, and the airtight cover includes a fixing bracket, a door, and a pressuring handle. The fixing bracket has a through hole and a guiding slot, and the through hole communicates with internal space of the container. The guiding slot has adjacent first and second top surfaces, and the second top surface is higher than the first top surface. The door selectively covers the through hole. The pressuring handle pivoted on the door has a first section, a second section, and a rotating axis between the first and second sections, and the first section rotates relative to the second section. The second section receives a force to drive the first section to move from below the second top surface to below the first top surface such that the rotating axis pressures the door.

A transparent electronic display layer is placed between a front and rear transparent layer. A light guide is positioned behind the transparent electronic display layer and has an outer edge. Lighting elements are positioned adjacent to the outer edge. A cavity is positioned adjacent to and on an opposing side of the lighting elements as compared to the light guide such that light exiting the lighting elements enters both the light guide and the cavity. A graphic may be provided at the cavity.

A display system for a refrigerated display case includes a door assembly which permits access to a product storage compartment. The door assembly includes an electronic display layer positioned within an enclosure defined by a front cover layer, a rear cover layer, and a spacer extending about a perimeter of interior surfaces of the front and rear cover layers. The front cover layer permits viewing of images displayed at the electronic display layer through the front cover layer. Electronic equipment for operating the electronic display layer is located outside of the enclosure.

Disclosed is a display module including a transparent display panel and a frame to fix a side of the transparent display panel, wherein the frame has a communication unit to receive data from the outside, a controller to process the received data and to output a drive command corresponding to the processed data and a display drive unit to drive the transparent display panel in response to the drive command from the controller. A display system includes a system body and a display module detachably mounted in the system body.

A lighting device includes a light emitting diode (LED) that has a main axis of light emission. The lighting device also includes a lens element positioned adjacent the LED. The lens element has a geometry defined by at least partial revolution of a cross-sectional profile around an axis of revolution. The lens element is positioned relative to the LED such that the axis of revolution crosses the main axis of light emission of the LED. The lens element is operative to apply total internal reflection to at least some light rays emitted from the LED.

Disclosed is a portable freezer module (30) for displaying and dispensing frozen edible products. The module comprises a case (32) and a duct (36). The case (32) comprises an insulated container having an interior space (33) for containing the frozen products, and an active cooling system for cooling the interior space and having a hot end (31) and a cold end (35). The duct (36) extends from the hot end (31) of the active cooling system of the case to a heat exhaust outlet (38). The module (30) is configured such that the case (32) can be removably sited in a presentation space (24) of a chill cabinet (20) with the heat exhaust (38) of the duct (36) positioned outside of the presentation space (24). The duct (36) is a hollow tube free from refrigerant conduits, electrical cables and other electrical equipment.

Disclosed is a display module including a transparent display panel and a frame to fix a side of the transparent display panel, wherein the frame has a communication unit to receive data from the outside, a controller to process the received data and to output a drive command corresponding to the processed data and a display drive unit to drive the transparent display panel in response to the drive command from the controller. A display system includes a system body and a display module detachably mounted in the system body.

A refrigerated display case includes sidewalls, doors, shelves, a cooling system, a cooling coil defrost system, product defrost lights, and a controller. The sidewalls and doors may define an inner volume of the refrigerated display case. The shelves are positioned within the inner volume of the refrigerated display case, are fixedly coupled with at least one of the sidewalls, and are configured to support a product. The cooling system provides cooling to the inner volume of the refrigerated display case and may include a cooling coil. The cooling coil defrost system provides defrost heating to the cooling coil. Each of the product defrost lights are oriented towards a corresponding one of the shelves. The product defrost lights are configured to emit radiative heating for defrosting the product. The controller is operably coupled with the cooling system, the cooling coil defrost system, and the product defrost lights.

Disclosed is a display module including a transparent display panel and a frame to fix a side of the transparent display panel, wherein the frame has a communication unit to receive data from the outside, a controller to process the received data and to output a drive command corresponding to the processed data and a display drive unit to drive the transparent display panel in response to the drive command from the controller. A display system includes a system body and a display module detachably mounted in the system body.