Patent ID: 6335523
Filing Date: 2002-01-01
Classification: H01L

Abstract:
A semiconductor dark image position sensing device, comprising a photoelectric layer generating a photoelectric current in a portion where light is input in response to intensity of the light input,a resistive element layer into which said photoelectric current generated in said photoelectric layer flows from a portion corresponding to said position of light input, a second resistive element disposed in association with said photoelectric layer for replenishing an insufficient amount of electric current with respect to said photoelectric current so as to flow the same into the resistive element layer in such that a distribution of electric current flowing into said resistive element layer corresponding to said position of light input becomes substantially uniform over a whole sensing region, and signal electric current output terminals disposed at the opposite ends of said second resistive element; wherein the electric current for replenishing an insufficient amount of said photoelectric current is supplied from a portion corresponding to a position where said photoelectric current in said second resistive element flows into said resistive element layer, the electric current for replenishing an insufficient amount of said photoelectric current is distributed at a ratio in response to a resistance value defined between a portion for supplying the electric current for replenishing an insufficient amount of said photoelectric current on said second resistive element and said signal current output terminals, and the electric current is output from the signal current output terminals as an electric current which is summed over the whole region of a section to which is supplied an insufficient amount of said photoelectric current.