Patent ID: 7258311

Claim:
A liquid crystal display, comprising: a supporting base having a first section, a second section, a third section, a first pivot positioned between the first section and the second section, and a second pivot positioned between the second section and the third section, wherein the second section of the supporting base is hollow, and wherein the first pivot comprises a fixed element connected to the first section of the supporting base, and a movable element connected to the second section of the supporting base; a display unit connected to the third section of the supporting base, exerting a first torque on the first pivot by a weight of the display unit; and a pre-force mechanism having a first end connected to the first pivot and a second end movably disposed in the second section, wherein the pre-force mechanism comprises a rod coupled to the fixed element of the first pivot, a stopper disposed in the second section of the supporting base, and a spring disposed on the rod and pressed against the stopper, and wherein the pre-force mechanism exerts a second torque on the first pivot, and the second torque and the first torque being in opposite directions; wherein the rod comprises the first end coupled to the fixed element of the first pivot, the second end movably disposed in the second section of the supporting base, and a middle portion located between the first end and the second end.