A hinge assembly could be installed between a panel and a base of an LCD and has a body, an active leaf and two mounting leaves. The body has two sides and two protrusions formed on the two sides respectively. The active leaf has two mounting portions mounted pivotally with the mounting leaves respectively and each mounting portion has a retainer. The mounting leaves are mounted pivotally on the two sides of the body and each mounting leaf has a slide slot with a folding end and an active slot with a latching end. The slide slots hold the protrusions respectively and the active slots hold the retainers. When the protrusions reach the folding ends, the panel and the base is folded into a flat status and encasing or transporting of the LCD is convenient.