Patent ID: 7542861

Claim:
An LED calibration system, comprising: a calibration host, for generating an image capturing control signal and using a calibration computation to generate an instruction data input signal; an image capturing device, for receiving said image capturing control signal to perform image capturing and to generate an image capturing data; and a plurality of LED modules, each said LED module having a self-test enabling signal, an instruction data input signal and an instruction data output signal, said instruction data input signal of a said LED module being connected to said instruction data input signal of said calibration host, and said LED modules being connected in cascaded manner, said instruction data output signal of a previous said LED module being connected to said instruction data input signal of a next said LED module, said LED module further comprising: a controller, for receiving said self-test enabling signal and said instruction data input signal to perform an appropriate processing to generate a driver control signal or a memory access signal; a plurality of drivers, each said driver having an instruction data input end and an instruction data output end, and generating a driving signal, said instruction data input end of a said driver being connected to said driver control signal of said controller, and said drivers being connected in cascaded manner, said instruction data output end of a previous said driver being connected to said instruction data input end of a next said driver, said instruction data output end of a last said driver being connected to said instruction data output signal of said LED module; a memory, connected to said memory access signal of said controller, for providing said controller to access data; and an LED array, comprising a plurality of LEDs, each said LED receiving said driving signal from said corresponding driver to emit light; wherein said instruction data input signal of said calibration host comprising an instruction byte and a plurality of data bytes, based on said self-test enabling signal, said controller determining whether to enter a self-test mode, and said controller further determining whether to enter a calibration mode or a normal display mode in accordance with said instruction byte.