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Method and system for LED calibration

  • US 7,542,861 B1
  • Filed: 10/01/2008
  • Issued: 06/02/2009
  • Est. Priority Date: 10/01/2008
  • Status: Expired due to Fees
First Claim
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1. 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 ofa 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.

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