Chip on board display device and method for making the same

A method for making a chip on board (COB) display device, comprising the steps of:

• a) mounting an array of spaced-apart micro light-emitting diode (LED) chips on a first surface of a substrate to permit the micro LED chips to define thereamong, a recessed portion;
• b) filling an opaque polymer material in the recessed portion by inkjet printing to form a light-shielding layer therein, so as to obtain a semi-finished product;
• c) providing a mold with a mold-releasing layer which has a micropattern of a concave-convex structure and which is provided for confronting the micro LED chips of the semi-finished product;
• d) positioning the semi-finished product in a mold cavity of the mold in such a manner that the micro LED chips faces the mold-releasing layer;
• and
• e) after step d), introducing a light-transmissive optical material to the mold cavity that is positioned between the semi-finished product and the mold-releasing layer, such that the light-transmissive optical material is cured to form an anti-glare layer that covers the light-shielding layer and the micro LED chips, and such that the micropattern of the mold-releasing layer is transferred to form a patterned microstructure of the anti-glare layer.