Patent ID: 6853123

Claim:
In a large-area radiator of homogeneous luminance with a front pane and a rear element, wherein spacer elements extending from the front pane to the rear element include one end in contact with the front pane and an opposing end in contact with the rear element to keep the front pane apart from the rear element, a gaseous filler is introduced into a space between the front pane and the rear element and is at a lesser pressure than a pressure of a surrounding atmosphere, and the front pane is made of a glass material, the improvement comprising: at least one of the front pane and the rear element at least partially of one of a thermally tempered glass pane and a chemically tempered glass pane; wherein at least one of a measurement of a wall thickness of at least one of the front pane and the rear element is 0.5 mm to 2.1 mm, and is tempered by a chemical tempering of more than 160 MPa.