This invention relates to a flat flourescent lamp for background lighting, and a liquid crystal display system. A flat fluorescent lamp (1) has a discharge vessel (2) hazving a base plate (7), a top plate (8) and a frame (9) which are connected to one another in a gas-tight fashion by means of solder (10). Structures resembling conductor tracks function in the interior of the discharge vessel as electrodes (3-6), in the feedthrough region as feedthroughs, and in the external region as external supply leads (13:1 14). Flat lamps of the most different sizes can thereby be produced simply in engineering terms and in a fashion capable of effective automation. Moreover, virtually any electrodes shapes can be realized, in particular optimized with regard to a unionluminous density with a reduced drop inluminous density towards the edges of the flat lamp. At least the anodes (5,6) are covered in each case with a dielectric layer (15). The lamp (1) is preferably operated by means of a pulsed voltage source and serves as background lighting for LCDs, for example in monitors or driver information displays.
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