An illumination device for a cooking zone element is provided for a cooking hob which is covered by a transparent panel. The illumination device is provided for a cooking zone element with a central cutout in a central portion of said cooking zone element. The illumination device includes at least one diffuser screen arranged or arrangeable in an upper portion of the central cutout of the cooking zone element and parallel to the transparent panel of the cooking hob. The illumination device includes at least one light source element arranged or arrangeable below the central cutout of the cooking zone element. The illumination device includes an optical lens enclosing an upper portion of the light source element. Further, the present invention relates to a corresponding cooking zone element and cooking hob.

The present invention relates to a vitroceramic article intended in particular to cover or receive heating elements, said article being provided with at least one luminous zone, in particular for display, comprising at least one luminous pattern, said article comprising at least one vitroceramic substrate, at least one light source, and at least one enamel coating which covers at least a part of said zone and within which an uncovered region is formed in the shape of said pattern, the composition of said enamel comprising at least one glass frit and at least one pigment, the glass frit comprising the following constituents: TABLE-US-00001 SiO.sub.2 40-55% Al.sub.2O.sub.3 0-10% B.sub.2O.sub.3 25-55% Na.sub.2O 0-5% K.sub.2O 0-5% Li.sub.2O .sup.0-10%,
the rate of pigment or pigments being from 40 to 65% by weight of the frit/pigment mixture, the article furthermore comprising a diffusing zone facing the enamel coating.