Dual-view naked-eye 3D display device and manufacturing method thereof, liquid crystal display device

A method for manufacturing a dual-view naked-eye 3D display device, comprising:

• providing a diffraction grating on a thin film transistor (TFT) substrate;
• providing a liquid crystal layer on the diffraction grating;
• providing a polarizer on the liquid crystal layer;
• and
• providing a light source for emitting light to the TFT substrate,
• wherein the TFT substrate comprises a plurality of pixel units arranged in an array, the diffraction grating in each pixel unit has two grating patterns, extending directions of light-shielding strips of the two grating patterns have a predetermined angle therebetween, and the light source is a light source that emits collimated light,
• wherein each pixel unit comprises two sub-pixels, each sub-pixel comprising either of the two grating patterns,
• wherein the two sub-pixels are configured to display corresponding different images, and
• wherein angles between extending directions of the light-shielding strips of the two grating patterns corresponding to adjacent pixel units on the TFT substrate are different.