Manufacturing method of display device and display device

The embodiment of the invention provides a manufacturing method of a display device and the display device, and the method comprises the steps: manufacturing a red light crystal, a green light crystal and a blue light crystal, respectively manufacturing electrodes on an epitaxial layer of the red light crystal, an epitaxial layer of the green light crystal and an epitaxial layer of the blue light crystal, and forming a red film on the surface area of the red light crystal, forming a green film on the surface area of the green light crystal, forming a blue film on the surface area of the blue light crystal, splitting the red light crystal with the red film into a red light chip, splitting the green light crystal with the green film into a green light chip, and splitting the blue light crystal with the blue film into a blue light chip; and carrying out die bonding on the red light chip, the green light chip and the blue light chip on the printed circuit board, and packaging the LED chip obtained by die bonding. And a part of ambient light passing through the chip can be absorbed by the color film on the surface of the chip, so that the whitening phenomenon caused by the reflection of the ambient light can be reduced.