Printer head

A printer head comprising:

• an insulation substrate;
• a light emitting array having a plurality of light emitting portions aligned on said insulation substrate;
• and
• driver circuit means including integrated circuit elements and having input terminals and output terminals, respectively, aligned on one side of said insulation substrate in a direction orthogonal to the aligning direction of the light emitting portions, each of said output terminals being connected to one of said plurality of light emitting portions.

A printer head comprising:

• a rectangular insulation substrate;
• a light emitting array including a plurality of light emitting portions aligned on a side of a semiconductive substrate in an approximately central portion on one side of said insulation substrate and aligned in a direction parallel to a longitudinal direction of said insulation substrate, common electrode formed on a rear surface of said semiconductive substrate and commonly connected to said plurality of light emitting portions and lead electrodes each connected to the respective one of said plurality of light emitting portions, said lead electrodes including a first group of electrodes extending in a first direction from the light emitting portions located in orders in odd numbers counted from the one end of the array and a second group of lead electrodes extending in a second direction from the light emitting portions in orders in even numbers counted form the one end of the array, said second direction being opposite to the first direction;
• driver circuit means disposed on the other side of said insulation substrate for driving said light emitting portions, said driver circuit means having a plurality of input terminals and a plurality of output terminals aligned, respectively, in a direction orthogonal to the aligning direction of said plurality of light emitting portions;
• a plurality of external connection terminals formed on the said other side of said insulation substrate, any of said plurality of external connection terminals being connected to one of said input terminals of said driver circuit means;
• a plurality of first conductive strip lines formed on said insulation substrate for connecting said output terminals of said driver circuit means to said lead electrodes of said plurality of light emitting portions;
• and
• a second conductive strip line formed on said insulation substrate, one end of the second conductive strip line being connected to the common electrode of the light emitting array and extending toward said other side in a central portion of said insulation substrate passing through the underside of said driver circuit means, so that the other end of said second conductive strip line can be connected to any of said external connection terminals.

A printer head comprising:

• a rectangular insulation substrate;
• a light emitting array including a plurality of light emitting portions aligned on a side of a semiconductive substrate near a central portion on one side of said insulation substrate and aligned in a direction parallel to a longitudinal direction of said insulation substrate, a common electrode formed on a rear surface of the substrate and commonly connected to said plurality of light emitting portions, and lead electrodes each connected to a corresponding one of said plurality of light emitting portions, said lead electrodes comprising a first group of lead electrodes extending in a first direction from the light emitting portions located in orders in odd numbers counted from the one end thereof and a second group of lead electrodes extending in a second direction from the light emitting portions located in orders in even numbers counted from the one end thereof, said second direction being opposite to the first direction;
• driving circuit means disposed on the other side of said insulation substrate and including integrated circuit elements for driving said light emitting portions, said driver circuit means having a plurality of input terminals and a plurality of output terminals, respectively, aligned in a direction orthogonal to the aligning direction of said plurality of light emitting portions;
• a plurality of internal connection terminals formed on the surface in the other side of said insulation substrate, any of said external connection terminals being connected to one of the input terminals of said driver circuit and;
• a plurality of first conductive strip lines formed on said insulation substrate for connecting said output terminals of said driver circuit means to said lead electrodes of said plurality of light emitting portions;
• and
• a second conductive strip line formed on said insulation substrate, one end of the second strip line being connected to the common electrode of said light emitting array and extending to the other end along the periphery of said insulation substrate, the other end of the second strip line being connected to any of said external connection terminals.