We propose here the new integrated light emitting device array with shift register logic function for photo-printer head, which consists of the SLED shift register and light emitting thyrsitors for photo-printing. The SLED, self-scanning light emitting device, consists of the pnpn-thyristor array whose gates are connected one,another through the resistor and diode network. The new integrated device array for the photo-printer head has some merits as compared with conventional LED array. For example, there are no need to drive the integrated light emitting device array, and the numbers of bonding-wire are remarkably decreased. Therefore the cost and the size of the photo-printer head can be reduced and the fine photo-printer head can be realized.
