Patent ID: 8755054

Claim:
A method of measuring a surface structure of a display device, comprising: providing a display device, the display device comprising: a first substrate, having a first surface; a first patterned light-shielding layer, having a plurality of first openings and disposed on the first surface of the first substrate; at least one second patterned light-shielding layer, having a plurality of second openings and disposed on the first surface of the first substrate; at least one first pixel unit, comprising: at least one first protrusion, correspondingly covering the first openings of the first patterned light-shielding layer; and at least one second protrusion, disposed on and directly contacted with the first patterned light-shielding layer and the second patterned light-shielding layer; at least one second pixel unit, comprising: at least one third protrusion, correspondingly covering the second openings of the second patterned light-shielding layer, wherein sizes of the second openings of the second patterned light-shielding layer are smaller than sizes of the first openings of the first patterned light-shielding layer, and a length in between two of the adjacent first openings of the first bar-shaped light-shielding pattern is smaller than a length in between two of the adjacent second openings of the second bar-shaped light-shielding pattern; and a second substrate, having a second surface and disposed opposite to the first surface of the first substrate; providing a measuring apparatus; measuring a first height of the first protrusion covering a surface of the second patterned light-shielding layer, the first height being a height difference between the second patterned light-shielding layer and the first protrusion; measuring a second height of the second protrusion covering a surface of the second patterned light-shielding layer, the second height being a height difference between the second patterned light-shielding layer and the second protrusion; and calculating a third height which is a difference between the first height and the second height.