Liquid Crystal Lens and Display Apparatus

Abstract

The present disclosure provides a liquid crystal lens and a display apparatus. The liquid crystal lens includes a first substrate and a second substrate arranged to be opposite to each other, a common electrode being provided on the second substrate; a liquid crystal layer interposed between the first and second substrates and including liquid crystal molecules; liquid crystal lens units, each of which includes a first group of strip-shaped electrodes and a second group of strip-shaped electrodes parallel to each other and spaced apart thereon, upon applying a voltage among the first and second groups, and the common electrode, a planoconvex lens is formed within the liquid crystal molecules between them, wherein each of the first and second groups includes layers of sub-electrodes insulated from each other, the sub-electrodes of the first and second groups are applied with a voltage, so as to adjust symmetry of the planoconvex lens.

1 . A liquid crystal lens, comprising:
 a first substrate;   a second substrate arranged to be opposite to the first substrate, wherein a common electrode is provided on the second substrate;   a liquid crystal layer interposed between the first and second substrates and comprising a plurality of liquid crystal molecules;   a plurality of liquid crystal lens units, each of which comprises a first group of strip-shaped electrodes and a second group of strip-shaped electrodes parallel to each other and spaced apart on the first substrate, upon applying a voltage among the first group of strip-shaped electrodes, the second group of strip-shaped electrodes and the common electrode, a planoconvex lens is formed within the liquid crystal molecules between the common electrode and the first and second groups of strip-shaped electrodes,   wherein each of the first and second groups of strip-shaped electrodes comprises a plurality of layers of sub-electrodes insulated from each other, the sub-electrodes of the first group of strip-shaped electrodes and the sub-electrodes of the second group of strip-shaped electrodes are applied with a voltage, so as to adjust symmetry of the planoconvex lens.   
     
     
         2 . The liquid crystal lens as claimed in  claim 1 , wherein
 a width of each layer of sub-electrode in the first group of strip-shaped electrodes and/or a width of each layer of sub-electrode in the second group of strip-shaped electrodes decrease progressively in a vertical direction from the first substrate to the second substrate.   
     
     
         3 . The liquid crystal lens as claimed in  claim 1  wherein
 all of layers of sub-electrodes in the first group of strip-shaped electrodes have projections coinciding with each other on the first substrate at an end of a side away from the second group of strip-shaped electrodes, and/or 
 all of layers of sub-electrodes in the second group of strip-shaped electrodes have projections coinciding with each other on the first substrate at an end of a side away from the first group of strip-shaped electrodes. 
 
     
     
         4 . The liquid crystal lens as claimed in  claim 1 , wherein
 in the first and second groups of strip-shaped electrodes, the widths of the sub-electrodes within a same layer of at least one layer of sub-electrodes are different.   
     
     
         5 . The liquid crystal lens as claimed in  claim 1 , wherein
 a number of layers of sub-electrodes within the first group of strip-shaped electrodes is identical with or different from that of layers of sub-electrodes within the second group of strip-shaped electrodes.   
     
     
         6 . The liquid crystal lens as claimed in  claim 1 , wherein
 a thickness of each layer of sub-electrode in the first group of strip-shaped electrodes is a first thickness, a thickness of each layer of sub-electrode in the second group of strip-shaped electrodes is a second thickness, and the first thickness is equal or not equal to the second thickness.   
     
     
         7 . The liquid crystal lens as claimed in  claim 1 , wherein
 thicknesses of at least two layers of sub-electrodes in the first group of strip-shaped electrodes are different from each other, and/or thicknesses of at least two layers of sub-electrodes in the second group of strip-shaped electrodes are different from each other.   
     
     
         8 . The liquid crystal lens as claimed in  claim 1 , wherein
 each layer of sub-electrode in the first group of strip-shaped electrodes is applied with a first voltage, each layer of sub-electrode in the second group of strip-shaped electrodes is applied with a second voltage, and the first voltage is equal or not equal to the second voltage.   
     
     
         9 . The liquid crystal lens as claimed in  claim 1 , wherein
 at least two layers of sub-electrodes in the first group of strip-shaped electrodes are applied with different voltages, and/or at least two layers of sub-electrodes in the second group of strip-shaped electrodes are applied with different voltages.   
     
     
         10 . The liquid crystal lens as claimed in  claim 1 , wherein
 an insulation layer is provided between each two adjacent layers of sub-electrodes in the first group of strip-shaped electrodes, an insulation layer is provided between each two adjacent layers of sub-electrodes in the second group of strip-shaped electrodes, wherein thicknesses of at least two insulation layers in the first group of strip-shaped electrodes are different or equal, and/or thicknesses of at least two insulation layers in the second group of strip-shaped electrodes are different or equal.   
     
     
         11 . The liquid crystal lens as claimed in  claim 1 , wherein
 an insulation part is provided between adjacent liquid crystal lens units.   
     
     
         12 . The liquid crystal lens as claimed in  claim 1 , wherein
 in adjacent liquid crystal lens units, the first group of strip-shaped electrodes of one liquid crystal lens unit is adjacent to the first group of strip-shaped electrodes or the second group of strip-shaped electrodes of another liquid crystal lens unit.   
     
     
         13 . A display apparatus, comprising the liquid crystal lens as claimed in  claim 1 , and a display panel, wherein the liquid crystal lens is provided on a light exiting face of the display panel. 
     
     
         14 . The liquid crystal lens as claimed in  claim 2 , wherein
 all of layers of sub-electrodes in the first group of strip-shaped electrodes have projections coinciding with each other on the first substrate at an end of a side away from the second group of strip-shaped electrodes, and/or   all of layers of sub-electrodes in the second group of strip-shaped electrodes have projections coinciding with each other on the first substrate at an end of a side away from the first group of strip-shaped electrodes.   
     
     
         15 . The display apparatus as claimed in  claim 13 , wherein
 a width of each layer of sub-electrode in the first group of strip-shaped electrodes and/or a width of each layer of sub-electrode in the second group of strip-shaped electrodes decrease progressively in a vertical direction from the first substrate to the second substrate.   
     
     
         16 . The display apparatus as claimed in  claim 13 , wherein
 in the first and second groups of strip-shaped electrodes, the widths of the sub-electrodes within a same layer of at least one layer of sub-electrodes are different.   
     
     
         17 . The display apparatus as claimed in  claim 13 , wherein
 a number of layers of sub-electrodes within the first group of strip-shaped electrodes is identical with or different from that of layers of sub-electrodes within the second group of strip-shaped electrodes.   
     
     
         18 . The display apparatus as claimed in  claim 13 , wherein
 a thickness of each layer of sub-electrode in the first group of strip-shaped electrodes is a first thickness, a thickness of each layer of sub-electrode in the second group of strip-shaped electrodes is a second thickness, and the first thickness is equal or not equal to the second thickness.   
     
     
         19 . The display apparatus as claimed in  claim 13 , wherein
 thicknesses of at least two layers of sub-electrodes in the first group of strip-shaped electrodes are different from each other, and/or thicknesses of at least two layers of sub-electrodes in the second group of strip-shaped electrodes are different from each other.   
     
     
         20 . The display apparatus as claimed in  claim 13 , wherein
 each layer of sub-electrode in the first group of strip-shaped electrodes is applied with a first voltage, each layer of sub-electrode in the second group of strip-shaped electrodes is applied with a second voltage, and the first voltage is equal or not equal to the second voltage.