Liquid crystal grating and fabrication method thereof, and naked eye 3D display device

A fabrication method of a liquid crystal grating, comprising:

• forming a transparent conductive layer on a first substrate, and forming a pattern including a plate-shaped transparent electrode by a patterning process;
• forming a second transparent conductive layer on a second substrate, and forming a pattern including third strip-shaped transparent electrodes provided at intervals by a patterning process;
• forming a transparent insulating layer on the second substrate where the second transparent conductive layer has been formed;
• forming a first transparent conductive layer on the second substrate where the transparent insulating layer has been formed, forming a pattern including first strip-shaped transparent electrodes and second strip-shaped transparent electrodes by a patterning process, the first strip-shaped transparent electrodes and the second strip-shaped transparent electrodes being alternately provided, and a gap being between the first strip-shaped transparent electrode and the second strip-shaped transparent electrode adjacent to each other;
• and
• dripping off liquid crystal molecules on the first substrate or the second substrate, and bonding the first substrate and the second substrate to form the liquid crystal grating, wherein,
• only one third strip-shaped transparent electrode with its entirety is provided in an orthographic projection, on the second transparent conductive layer, of a region of every two immediately adjacent first strip-shaped transparent electrodes and one second strip-shaped transparent electrode between the every two immediately adjacent first strip-shaped transparent electrodes;
• a first one of the second strip-shaped transparent electrodes is at a first side of a first one of the first strip-shaped transparent electrodes and is immediately adjacent to the first one of the first strip-shaped transparent electrodes, and a second one of the second strip-shaped transparent electrodes is at a second side, which is opposite to the first side, of the first one of the first strip-shaped transparent electrodes and is immediately adjacent to the first one of the first strip-shaped transparent electrodes;
• a second one of the first strip-shaped transparent electrodes is at a side, away from the first one of the first strip-shaped transparent electrodes, of the first one of the second strip-shaped transparent electrodes and is immediately adjacent to the first one of the second strip-shaped transparent electrodes, and a third one of the first strip-shaped transparent electrodes is at a side, away from the first one of the first strip-shaped transparent electrodes, of the second one of the second strip-shaped transparent electrodes and is immediately adjacent to the second one of the second strip-shaped transparent electrodes;
• a width of each of the first strip-shaped transparent electrodes is greater than a width of each of the second strip-shaped transparent electrodes.