Abstract:
A voltage regulator includes a voltage driving circuit and a current sinking unit. The voltage driving circuit is controlled to maintain an output signal at an output node. The current sinking unit is coupled to the output node for generating a sinking current for diverting an external current to the output node. An error amplifier generates a control signal from the output signal and a reference signal. The voltage driving circuit and the current sinking unit are controlled according to such a control signal.
Abstract:
A method and apparatus for testing a liquid crystal display device are provided to detect a defect location precisely and rapidly without requiring a jig. The method includes providing an inspection apparatus as a removable portion of the liquid crystal display device; inspecting the display part of the liquid crystal display device using the inspection apparatus; removing the inspection apparatus from the liquid crystal display device after the inspection is completed; and attaching driving circuits to the liquid crystal display device having the inspection apparatus removed therefrom.
Abstract:
A method and apparatus for testing a liquid crystal display device are provided to detect a defect location precisely and rapidly without requiring a jig. The method includes providing a substrate to inspect, wherein the substrate includes signal wirings, drive switches and capacitors formed in an effective display area of the substrate; radiating a light onto an inspection switch device and thereby supplying an inspection voltage from an inspection line to one of the drive switches through the signal wirings, so as to charge one of the capacitors; and determining if there is a defect in the effective display area of the substrate by reading the charged voltage of the capacitor.
Abstract:
A liquid crystal display device includes: a liquid crystal panel; a backlight assembly for irradiating light onto the liquid crystal panel; and a reflection layer between the liquid crystal panel and the backlight assembly for increasing an amount of light incident onto the liquid crystal panel.