System for testing distortion of liquid crystal display device

A system for testing a distortion of a liquid crystal

• display (LCD) device, comprising:
• a base;
• a fixing unit that fixes the LCD device, the fixing unit being rotated on one end side thereof so that a display face of the LCD device is vertical to a ground;
• a laser sensor on the base at front side or rear side of the LCD device that irradiates light to the LCD device to measure a displacement of an internal component thereof;
• a conveyer at a front side or rear side of the LCD device, the laser sensor being mounted to the conveyor and movable relative to the LCD device during a testing of the distortion of the LCD device;
• and
• a controller that detects a position of an internal component of the LCD device based upon information input by the laser sensor, and compares the detected position with a preset position of the corresponding internal component to determine a distortion of the component,
• wherein the light from the laser sensor is reflected from the internal component and then incident to the laser sensor to detect a position of the internal component,
• wherein the LCD device, the fixing unit, the laser sensor and the conveyer are disposed within a chamber in which a temperature and a humidity are varying to test LCD device in environments of various temperature and humidity,
• wherein the LCD device has a display region extended in x and y directions and a thickness in the z-direction and the laser sensor is conveyed and continuously moved in the x and y directions at the front side or rear side of LCD device to scan the display region of the LCD device in x and y directions by the conveyer during the testing of the distortion of the LCD device,
• wherein the laser sensor comprises a non-transmission type laser sensor, wherein light emitted from the non-transmission type laser sensor is irradiated into the LCD device via a window in a lower cover.