A light-guide plate comprising a light-guide board having a first refractive index and at least one light-guide part buried inside the light-guide board is provided. A query that includes one or more query terms is received. An optical carrier phase difference detecting section has an optical carrier interferometer, and an interference signal detecting section including a optical-to-electrical converter and a peak detection circuit. Thus, the digital broadcasting receiver provides an effect of performing a PIP screen function in which a plurality of decoders decode each of the broadcasting signals. Moreover, the color filter array includes consecutive first filters of two or more pixels in four directions of horizontality, verticality, oblique upper right and oblique lower right. A layer of a slip comprising a silicon powder is applied to an inside of the base body so as to obtain a coated base body.