For description purposes only, the embodiment where the light valve 302 is disposed between the display panel 10 and the birefringent layer 301 is used as an example to illustrate a working principle of the birefringent layer 301 to shift or not shift the light from the plurality of sub-pixels 20 in the present disclosure, and should not limit the scopes of the present disclosure. In various embodiment, the light valve 302 may be disposed at any suitable position as long as the birefringent layer 301 to shift can or can not shift the light from the plurality of sub-pixels 20. For example, the light valve 302 may be disposed at a side of the birefringent layer 301 away from the display panel 10.
In one embodiment illustrated in