A method and apparatus are provided for identifying the covert foci of attention of a person when viewing an image or series of images. The backlight module comprises a backplane and a heatsink plate attached to the backplane, and the backlight module of the LCD also comprises at least one press plate, wherein the press plate is attached to the heatsink plate to tightly press the heatsink plate against the backplane. The catalysts can optionally include additional materials such as copper, potassium, and silicon promoters.