Abstract: A method is disclosed of adjusting the light-emission of a light-emitting diode to a predetermined output level for a given driving current. The light-emitting diode is irradiated with a laser beam in a manner to burn tiny holes in the light-emitting surface to such an extent that said predetermined output level is obtained. The invention furthermore comprises a method of obtaining a substantially uniform light output of an array of light-emitting diodes.

Abstract: A recording device for linearly recording information upon a moving photoreceptor using a recording head that can be manufactured more readily. The recording head is made with a plurality of modules, each module comprising LED chip means having an aggregate length (n) greater than the length (o) of the base plate of the module and projecting exteriorly of the module side edges, and a common integrated control circuit for all the LED's mounted on the base plate of a given module, the outputs of such circuit being connected by wire bonding to the respective LED's on the module.