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An illuminated display unit such as a board with a house number thereon or an advertising billboard, has a light guide panel. At least one electrical illuminating element is arranged in the vicinity of at least one lateral limiting edge thereof. The light guide panel serves for illuminating logo sym

An illuminated display unit such as a board with a house number thereon or an advertising billboard, has a light guide panel. At least one electrical illuminating element is arranged in the vicinity of at least one lateral limiting edge thereof. The light guide panel serves for illuminating logo symbols, which are preferably in the form of film or of vapor coated layers, on the light guide panel. At least one of the lateral limiting edges of the light guide panel is provided with a light guide batten whose thickness is in excess of the thickness of the light guide panel and at least one of the illuminating elements is mounted in the batten. The transition between the light guide batten and the light guide panel is designed so as to have a high optical conductivity or transmittivity. The external surfaces of the light guide batten are provided at least partly with an inwardly reflecting layer. This makes it possible for the light of the illuminating elements, which are more especially in the form of LED\s with a large diameter, to be fully introduced in substantially thinner light guide panels in order to reduce costs and weight.

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A display unit comprising: a light guide panel having a front surface, a rear surface and edge surfaces; a display symbol arranged to be illuminated by said panel; a light guide batten arranged on one lateral limiting edge of said light guide panel and having a thickness in excess of a thickness of

A display unit comprising: a light guide panel having a front surface, a rear surface and edge surfaces; a display symbol arranged to be illuminated by said panel; a light guide batten arranged on one lateral limiting edge of said light guide panel and having a thickness in excess of a thickness of said light guide panel, said light guide batten having a groove accommodating a marginal zone of said light guide panel, to define a transition zone between said light guide batten and said light guide panel providing optical conductivity for passing light from inside said light guide batten via said side edge surface, said front surface and said rear surface of said light guide panel into said light guide panel; and at least one illuminating element mounted in said light guide batten.