LED ILLUMINATION UNIFORMITY

摘要

An input imaging system and method for adjusting LED light uniformity in an LED array are disclosed. For example, the input imaging system includes an LED array, wherein the LED array is divided into a plurality of different banks of LEDs, wherein a light output of each one of the plurality of different banks of LEDs is independently adjustable, an electrical device for adjusting the light output of the each one of the banks of LEDs coupled to each one of the plurality of different banks of LEDs to achieve the uniform LED light illumination profile, a diffuser coupled to the LED array to scatter the light output towards a document, a lens for collecting the light output that is reflected off of the document and a sensor coupled to the lens to receive the light output that is collected by the lens.

主权项

1. An input imaging system having a light emitting diode (LED) light illumination profile, comprising:
an LED array, wherein the LED array is divided into a plurality of different banks of LEDs, wherein a light output of each one of the plurality of different banks of LEDs is independently adjustable, wherein the LED light illumination profile is substantially symmetrical around a center, or a point, of the LED array and each one of the plurality of different banks of LEDs comprises a group of LEDs on opposite sides of the center, or the point, of the LED array; an electrical device for adjusting the light output of the each one of the banks of LEDs coupled to each one of the plurality of different banks of LEDs to achieve a uniform LED light illumination profile; a diffuser coupled to the LED array to scatter the light output towards a document; a lens for collecting the light output that is reflected off of the document; and a sensor coupled to the lens to receive the light output that is collected by the lens.