Display panel and display device

A display panel, comprising a first substrate and a second substrate opposite to each other, sub-pixels with multiple colors disposed on a side of the first substrate close to the second substrate, a protective layer disposed on a side of the sub-pixels close to the second substrate, upper polarizing units with various subwavelength nano-grating structures, and lower polarizing units with various subwavelength nano-grating structures;

• wherein the upper polarizing units with the various subwavelength nano-grating structures are different in at least one of a grating period, a grating duty ratio, and a grating height;
• the upper polarizing units with the various subwavelength nano-grating structures are disposed in one-to-one correspondence with the sub-pixels with the multiple colors to increase transmittance of transmitted light of each color through the upper polarizing units corresponding to the sub-pixels whose color is the same as the color of the upper polarizing units;
• the lower polarizing units with the various subwavelength nano-grating structures are disposed in one-to-one correspondence with the sub-pixels with the multiple colors, the lower polarizing units and corresponding upper polarizing units have a same structure, transmission axes of the upper polarizing units and the lower polarizing units are perpendicular to each other, and the lower polarizing units are disposed on a side of the upper polarizing units away from the sub-pixels;
• and
• the upper polarizing units are disposed on a side of the protective layer close to the second substrate, and the lower polarizing units are disposed on a side of the second substrate away from the first substrate.

A display device, comprising a display panel and a backlight module disposed corresponding to the display panel;

• wherein the backlight module is configured to provide a light source of the transmitted light to the display panel;
• the display panel comprises a first substrate and a second substrate opposite to each other, sub-pixels with multiple colors disposed on a side of the first substrate close to the second substrate, a protective layer disposed on a side of the sub-pixels close to the second substrate, upper polarizing units with various structures and lower polarizing units with various structures;
• and
• the upper polarizing units with the various structures and the lower polarizing units with various structures are disposed in one-to-one correspondence with the sub-pixels with the multiple colors, the upper polarizing units are disposed on a side of the protective layer close to the second substrate, and the lower polarizing units are disposed on a side of the second substrate away from the first substrate.