Slit grating, method for manufacturing the same and display device

A method for manufacturing a slit grating, wherein the slit grating comprises:

• an upper substrate and a lower substrate arranged hermetically and oppositely to each other to form a cell;
• and a liquid composite layer arranged between the upper substrate and the lower substrate, wherein:
• the liquid composite layer includes a light-shielding liquid and a light-transmitting liquid incompatible with each other,
• a first transparent conductive layer, an insulating layer, a second transparent conductive layer and an electric-controlled dielectric layer are formed sequentially at an upper surface of the lower substrate, and the electric-controlled dielectric layer has an electrically-induced light-shielding-liquid-philic or light-shielding-liquid-phobic property,
• the second transparent conductive layer comprises a plurality of parallel bar-like electrodes, the electric-controlled dielectric layer comprises a plurality of bar-like electric-controlled dielectric sublayers corresponding to regions where the bar-like electrodes are located, and the bar-like electrodes and the first transparent conductive layer are configured to control the respective bar-like electric-controlled dielectric sublayers to absorb or repel the light-shielding liquid,
• a plurality of crisscross partitioning walls are formed at the upper surface of the lower substrate so as to divide the upper surface of the lower substrate into a plurality of hermetical regions in a matrix form, and the liquid composite layer is filled within each hermetical region,
• the first transparent conductive layer and the plurality of parallel bar-like electrodes are arranged at an identical side of the plurality of hermetical regions away from the upper substrate, and the first transparent conductive layer arranged at the identical side of the plurality of hermetical regions away from the upper substrate is insulated from the plurality of parallel bar-like electrodes, and
• the bar-like electric-controlled dielectric sublayer consists of a plurality of electric-controlled dielectric blocks separated from each other, and each hermetical region is provided with a plurality of electric-controlled dielectric blocks;
• wherein the method comprises:
• providing the upper substrate and the lower substrate;
• forming the first transparent conductive layer, the insulating layer and the second transparent conductive layer at the upper surface of the lower substrate sequentially;
• patterning the second transparent conductive layer so as to form a plurality of parallel, bar-like electrodes;
• forming the electric-controlled dielectric layer having an electrically-induced light-shielding-liquid-philic or light-shielding-liquid-phobic property;
• patterning the electric-controlled dielectric layer so as to form a plurality of bar-like electric-controlled dielectric sublayers corresponding to regions where the bar-like electrodes are located;
• forming the hermetical regions at an upper surface of the electric-controlled dielectric layer;
• forming the liquid composite layer within the hermetical region, the liquid composite layer including the light-shielding liquid and the light-transmitting liquid incompatible with each other;
• and
• arranging the upper substrate and the lower substrate oppositely to each other to form a cell.

A display device capable of being switched between a 2D display mode and a 3D display mode, comprising:

• a display panel;
• a slit grating;
• and a voltage controlling unit, wherein:
• the slit grating comprises an upper substrate and a lower substrate arranged hermetically and oppositely to each other to form a cell, and a liquid composite layer arranged between the upper substrate and the lower substrate,
• the liquid composite layer includes a light-shielding liquid and a light-transmitting liquid incompatible with each other,
• a first transparent conductive layer, an insulating layer, a second transparent conductive layer and an electric-controlled dielectric layer are formed sequentially at an upper surface of the lower substrate, and the electric-controlled dielectric layer has an electrically-induced light-shielding-liquid-philic or light-shielding-liquid-phobic property, and
• the second transparent conductive layer comprises a plurality of parallel bar-like electrodes, the electric-controlled dielectric layer comprises a plurality of bar-like electric-controlled dielectric sublayers corresponding to regions where the bar-like electrodes are located, and the bar-like electrodes and the first transparent conductive layer are configured to control the respective bar-like electric-controlled dielectric sublayers to absorb or repel the light-shielding liquid,
• the bar-like electrodes correspond to regions where pixel units of the display panel are located,
• the voltage controlling unit is configured to apply voltages to the bar-like electrodes and a first transparent conducive layer so as to, in a 2D display mode, electrically induce bar-like electric-controlled dielectric sublayers to repel a light-shielding liquid and enable the light to be transmitted through the slit grating corresponding to the regions where the pixel units are located, and in a 3D display mode, electrically induce the bar-like electric-controlled dielectric sublayers corresponding to a first part of the bar-like electrodes to absorb the light-shielding liquid to form light-shielding stripes, and electrically induce the bar-like electric-controlled dielectric sublayers corresponding to a second part of the bar-like electrodes to repel the light-shielding liquid to form light-transmitting stripes, and the light-shielding stripes and the light-transmitting stripes are arranged at intervals, and
• a plurality of crisscross partitioning walls are formed at the upper surface of the lower substrate so as to divide the upper surface of the lower substrate into a plurality of hermetical regions in a matrix form, and the liquid composite layer is filled within each hermetical region,
• the first transparent conductive layer and the plurality of parallel bar-like electrodes are arranged at an identical side of the plurality of hermetical regions away from the upper substrate, and the first transparent conductive layer arranged at the identical side of the plurality of hermetical regions away from the upper substrate is insulated from the plurality of parallel bar-like electrodes, and
• the bar-like electric-controlled dielectric sublayer consists of a plurality of electric-controlled dielectric blocks separated from each other, each hermetical region is provided with a plurality of electric-controlled dielectric blocks, and the electric-controlled dielectric blocks in each hermetical region are in one-to-one correspondence to the pixel units of the display panel.