Patent ID: 7999275

Claim:
A composite semiconductor device, comprising: a semiconductor thin film including a row of light emitting elements extending in a first direction; a substrate on which said semiconductor thin film and driver circuits are formed, the driver circuits driving the light emitting elements; a row of connection pads formed on said substrate and extending in a second direction substantially parallel to the first direction; a plurality of wires electrically connected to the connection pads; and a light blocking layer formed in an area between the row of light emitting elements and the row of connection pads, the light blocking layer extending in a third direction along the row of light emitting elements to prevent light emitted from the light emitting elements from travelling in a straight direction to reach portions of the wires furthest from connection points between the wires and the connection pads, the light blocking layer including a plurality of portions that extend in a fourth direction substantially perpendicular to the third direction to define slits between adjacent portions.