Patent ID: 7876394

Claim:
A positioning apparatus, disposed in a backlight assembly having a diffuser plate, the positioning apparatus comprising: a supporting object, comprising a pillar, a cylindrical sustaining portion disposed at a first end of the pillar and having edges with a 90-degree cutting angle to increase the brightness of light emitted from the backlight assembly to the diffuser plate through the supporting object, relative to light emitted from the backlight assembly directly to the diffuser plate, and having a circumference greater than that of the pillar; and a cylindrical fixing portion disposed at a second end of the pillar opposite to the first end of the pillar, and having a circumference greater than that of the pillar, wherein either a top surface area or a rear surface area of the cylindrical fixing portion is larger than either a top surface area or a rear surface area of the cylindrical sustaining portion; and an adhesive, added on a top of the sustaining portion of the supporting object for pulling the diffuser plate, wherein texture machining is performed on the pillar of the supporting object to reflect light coming into the pillar up to the sustaining portion.