Liquid crystal display

#1. Field of the Invention

#The present invention relates to a liquid crystal display that is composed of at least two stacked liquid crystal display units.

#2. Description of the Related Art

#FIG. 1 is a sectional view of a liquid crystal display in accordance with the present invention.

#FIG. 2 is a sectional view of a modified embodiment of the liquid crystal display in accordance with the present invention.

#FIG. 3 is a perspective view of the modified embodiment of the liquid crystal display in FIG. 2.

#FIG. 1 shows two liquid crystal display units 1 that are stacked up one upon the other to form the liquid crystal display in accordance with the present invention having a better screening effect. Each liquid crystal unit 1 includes, from top to bottom, a first polarizer 10, a first glass substrate 20, a first pile layer 30, a liquid crystal layer 40, a second pile layer 30, a second glass substrate 20, and a second polarizer 10. Seal 50 is applied to a periphery of each glass substrate 20, thereby providing a sealed space between the first glass substrate 20 and the second glass substrate 20 for receiving the liquid crystal that forms the liquid crystal layer 40. Each polarizer 10 allows relative light waves to pass therethrough. Each glass substrate 20 is transparent to allow image light waves to pass therethrough. Each pile layer 30 can be disposed according to need, so as to match different view angles. The liquid crystal layer 40 has a twist angle of zero or greater than zero. As illustrated in FIG. 1, the two liquid crystal display units 1 are stacked up one upon the other to form the liquid crystal display in accordance with the present invention having a better screening effect. The number of the liquid crystal display units 1 is not limited. Namely, one may stack up the liquid crystal display units 1 as many as he/she wishes. The layers in each liquid crystal display unit 1 are adhered to each other by means of whole-face bonding by transparent or non-transparent glue, such as thermosetting glue, AB(two component liquid adhesive) glue, or UV(ultra light-weld adhesive) glue. Alternatively, the layers in each liquid crystal display unit are adhered to each other by means of peripheral bonding by transparent or non-transparent double-sided tape, epoxy resin, thermosetting glue, AB(two component liquid adhesive) glue, or UV(ultra light-weld adhesive) glue. The liquid crystal layer 40 may be colored to increase the screening effect.

#When used as an electric shutter, as illustrated in FIG. 5, the effective screening range of the resultant liquid crystal display in accordance with the present invention is broadened to be about 0˜35 degrees. Thus, the liquid crystal display in accordance with the present invention may be operated in wider view orientations and view angles and provide a better contrast effect. The liquid crystal display in accordance with the present invention may be used in electric shutters that require higher screening effect. The dead angle for screening is obviated by the liquid crystal display formed by at least two stacked liquid crystal display units. The view angle for forming image becomes larger and the resultant three-dimensional image is very clear. The liquid crystal display thus formed causes less harm to the vision system of the user even after a long-term use. The image in the right eye of the user and the image of the left eye of the user are not overlapped, thereby forming a three-dimensional image in the brain.

#FIGS. 2 and 3 show a modified embodiment of the invention, wherein one of the second polarizer 10 of an upper one of two stacked liquid crystal display units 1 and the first polarizer 10 of a lower one of the two stacked liquid crystal units 1 is removed. FIG. 4 illustrates another modified embodiment of the invention, wherein a conductive layer 60 and an optional insulating layer 70 is provided between the glass substrate 20 and the pile layer 30.