CONTINUOUS METHOD FOR THE PRODUCTION OF LIGHT GUIDE PLATES

摘要

The present invention relates to a method for continuously producing light guide plates, e.g. for use as backlighting in LC displays, and to an apparatus for carrying out said method.

主权项

1. A method for producing a light guide plate having light-influencing structures, the method comprising:
producing a plastic web by extrusion, in the presence of a device for smoothing the surface of a plastic plate web; continuously passing the plastic web below and/or above at least one laser engraving device; laser engraving light-influencing structures into at least one surface of the plastic web and/or in the interior of the plastic web with a laser engraving device, to obtain a structured plastic web; and producing individual light guide plates from the structured plastic web, wherein the laser engraving device is arranged into a continuous extrusion apparatus downstream of an extrusion polishing stack such that the laser engraving occurs at a temperature of the surface of the plastic web, facing the laser engraving device, of 40 to 120° C.