Patent ID: 7388623

Claim:
A liquid crystal display device for television, which an analog video signal is directly input, the liquid crystal display device comprising: a liquid crystal panel that displays video image, the liquid crystal panel having source electrodes and gate electrodes; a source driver that outputs signals to the source electrodes; a gate driver that outputs signals to the gate electrode; a storage unit that stores various pieces of information; and an IC chip that includes: a video processor that converts the analog video signal into a digital video signal; a scaling processor that converts the display size and display format of the digital video signal provided by the video processor; a panel processor that adjusts the digital video signal provided by the scaling processor to match characteristic of the liquid crystal panel; a timing controller that generates and outputs a drive timing signal for the source driver and the gate driver based on the video signal adjusted by the panel processor; an OSD display unit that generates video data different from video data included in the analog video signal; and a microcomputer that controls each of the components included in the IC chip, wherein the storage unit stores an image pattern as digital font data for displaying OSD image, and a predetermined image pattern different from the image pattern as digital font data, and wherein when inspecting display performance of the liquid crystal display device, the OSD display unit generates test pattern data by arranging the predetermined image pattern stored in the storage unit in a predetermined order so as to match the size of the liquid crystal panel, and outputs the test pattern data to the panel processor as digital video signal for displaying on the liquid crystal panel.