Patent ID: 9740041
Date: 2017-08-22
CPC Classifications: G02F

Claim:
1. A liquid crystal display, comprising a liquid crystal display panel and a backlight source; the liquid crystal display panel comprises an upper substrate and a lower substrate which are oppositely located and a liquid crystal layer located between the upper substrate and the lower substrate; the upper substrate comprises a first substrate, a color light emitting layer located above the first substrate, an unidirectional light guide thin film located above the color light emitting layer, an upper polarizer located under the first substrate and a first alignment film located under the polarizer; the lower substrate comprises a second substrate, a lower polarizer located under the second substrate, a thin film transistor layer located above the second substrate and a second alignment film located above the thin film transistor layer; the color light emitting layer comprises a plurality of red sub pixel areas, a plurality of green sub pixel areas and a plurality of blue sub pixel areas, and the red sub pixel area comprises red quantum dots of emission wavelength 610-650 nm, and the green sub pixel area comprises green quantum dots of emission wavelength 510-540 nm, and the blue sub pixel area comprises blue quantum dots of emission wavelength 410-440 nm or the blue sub pixel area comprises transparent material, and the red, green, blue sub pixel areas of the color light emitting layer respectively emit red, green, blue lights under irradiation of light emitted by the backlight source; the lights emitted from the color light emitting layer can propagate outward through the unidirectional light guide thin film, and exterior light is blocked and reflected by the unidirectional light guide thin film and cannot propagate to the color light emitting layer to excite the quantum dots to emit light.