Patent ID: 6822632
Filing Date: 2004-11-23
Classification: G09G

Abstract:
A liquid crystal display device, comprising:an optical module that provides a light to form an image; a display part that displays the image by controlling a transmittance amount of the light provided from the optical module; and a receiving part that receives and fixes the optical module and the display part, wherein the display part comprises: an LCD panel; a PCB that provides a data signal, a gate on/off signal, a common electrode voltage, and first plural control signals to operate the LCD panel; a source signal converter that generates a source signal with the data signal and a second control signal contained in the first plural control signals, and applies the source signal to the LCD panel; and a gate signal converter that generates the gate on signal and gate off signal with the gate on/off signal and a third control signal contained in the first plural control signals, and applies the gate on signal and gate off signal to the LCD panel; and a gate voltage stabilizer, comprising: a first feed-back voltage detector that detects a common electrode voltage corresponding to a first feed-back voltage from at least one position, wherein the first feed-back voltage detector includes a feed-back resistor; a reference voltage provider that controls a static voltage as a reference voltage within a predetermined voltage level; a comparator having a positive terminal electrically connected to the reference voltage provider capable of receiving the reference voltage and a negative terminal electrically connected to the first feed-back voltage detector capable of receiving the first feed-back voltage from the first feed-back voltage detector, wherein the comparator compares the first feed-back voltage with the reference voltage and outputs a compared result and the comparator comprises a loop including a second feed-back resistor in which the output of the comparator is mixed with the first feed-back voltage and then is fed-back to the comparator such that the comparator stabilizes an output of the comparator; and a divider electrically connected to an output terminal of the comparator capable of receiving a result outputted from the comparator, wherein the divider divides the result outputted from the comparator into at least two voltages having different voltage levels from each other and applying at least one of the two voltages to a common electrode of the LCD panel.