Transparent displaying apparatus

A transparent displaying apparatus, comprising a transparent display and a liquid crystal twisting layer arranged on a back surface of the transparent display, the liquid crystal twisting layer comprising therein liquid crystal molecules that selectively exhibits a state of arrangement of being substantially perpendicular to the transparent display and a state of arrangement of being substantially parallel to the transparent display, wherein when the liquid crystal molecules of the liquid crystal twisting layer are arranged perpendicular to the transparent display, the liquid crystal twisting layer is in a transparent state, which is adapted to allow a viewer to see, on a display screen of the transparent display, background scenery on a backside of the transparent displaying apparatus;

• and when the liquid crystal molecules of the liquid crystal twisting layer are arranged parallel to the transparent display, the liquid crystal twisting layer is in a non-transparent state, which prevents a viewer from seeing, on the display screen of the transparent display, the background scenery on the backside of the transparent displaying apparatus so as to allow the display screen of the transparent display to show relatively high displaying contrast as compared to the transparent state of the liquid crystal twisting layer;
• wherein the transparent display has a front surface on which the display screen is arranged to display an image toward the viewer located in a front side of the transparent display that is opposite to the backside and facing the front surface of the transparent display, the back surface of the transparent display being opposite to the front surface and facing the backside and adapted to receive backside light carrying the background scenery to irradiate thereon;
• wherein the liquid crystal twisting layer that is arranged on the back surface of the transparent display is switchable between the first state of arrangement and the second state of arrangement, wherein in the first state of arrangement, the liquid crystal twisting layer is of the transparent state in which the backside light irradiating on the back surface of the transparent display passes through the liquid crystal twisting layer to transmit toward and subsequently pass through the transparent display and in the second state of arrangement, the liquid twisting layer is of the non-transparent state in which the backside light irradiating on the back surface of the transparent display is blocked by the liquid crystal twisting layer from further transmitting toward and passing through the transparent display;
• wherein the liquid crystal twisting layer forms a separate light blocking device that is additionally attached to the back surface of the transparent device;
• wherein the liquid crystal twisting layer covers the entirety of the back surface of the transparent display or a portion of the back surface;
• wherein the liquid crystal twisting layer comprises a first substrate and a second substrate that are opposite to each other, a liquid crystal layer interposed between the first substrate and the second substrate, a first electrode arranged on a surface of the first substrate that faces the liquid crystal layer, and a second electrode arranged on a surface of the second substrate that faces the liquid crystal layer, wherein when no voltage is applied to the first electrode and the second electrode, liquid crystal molecules of the liquid crystal layer are substantially parallel to the transparent display and the liquid crystal layer is in the non-transparent state;
• and when a voltage is applied to the first electrode and the second electrode, the liquid crystal molecules of the liquid crystal layer are substantially perpendicular to the transparent display and the liquid crystal layer is in the transparent state;
• and
• wherein the transparent display comprises a transparent organic light-emitting diode (OLED) display or a transparent liquid crystal display (LCD).