System and method for testing LEDs on a motherboard

Details System and method for testing LEDs on a motherboard System and method for testing LEDs on a motherboard

2011-06-21

2011-06-21

Mehta, Bhavesh M (Department: 2624)

Image analysis

Applications

Manufacturing or product inspection

C250S227200

Reexamination Certificate

active

07965884

ABSTRACT:
An exemplary method and system for testing light-emitting diodes (LEDs) uses a camera module to take two bulb images of transparent bulbs connected to each of the LEDs. A first bulb image is captured when the LEDs are set in a power-on state, and a second bulb image is captured when the LEDs are set in a power-off state. The method divides each of the two bulb images into small pictures, and calculates an average pixel value of each of the small pictures. After calculating a first difference of each of the small pictures between the average pixel value and a first predetermined value, and a second difference of each of the small pictures between the average pixel value and a second predetermined value, the method ascertains a present state of each of the LEDs by comparing the two differences.

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