Abstract: On a data terminal compatible only with a specific image data format, image data in an incompatible data format could not be viewed. In addition, on a small display screen, only small-size image data could be viewed. In response to an image data distribution request from a data terminal, a data distribution device converts the format of image data incompatible with the data terminal before transmission to the data terminal. In addition, the data distribution device adds image operation buttons in order to send enlarged image data corresponding to any of the buttons.

Abstract: A lighting device includes light-emitting diodes 18 for emitting light, a light guide 16 for introducing the light from the light-emitting diodes 18 and emitting the light from a light-emitting surface 16a, lenses 21 provided on the end of the light guide 16 opposed to the light-emitting diodes 18. Concerning the curved shape of each lens 21, the size or shape of the curving is set so that light-emitting limits Lb from two adjacent light-emitting diodes 18, 18 intersect on the peripheral line of an effective light-emitting region Ah on the light-emitting surface 16a. Accordingly, the effective light-emitting region in the light guide totally emits light at uniform intensity.