An inspection and adjustment of a liquid crystal module have required a number of processes, which has been inefficient.According to the present invention, OSD image data is stored in a ROM 42 of a liquid crystal module 10, and the liquid crystal module 10 can independently display a plurality of test patterns simply by receiving a remote-control signal from a remote-control signal transmitter 60. Therefore, simply by putting the liquid crystal module on an inspection line 70, at each inspection station 71, a display pattern necessary for each inspection and adjustment is automatically switched and shown. Therefore, the inspection and adjustment of the liquid crystal module can be conducted without a process of connecting an exclusive substrate 110 and an image data generator 120 which used to be required only during the inspection and adjustment of each liquid crystal module 10 and a process for a worker to operate a prescribed device every time the type of inspection changes.
