Method and system for LED calibration
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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Abstract
A method and system for LED calibration is provided for a plurality of LED modules cascaded in a series. Each LED module includes a plurality of LEDs, a driver and a controller. The control signal from a calibration host is transmitted to all the modules to light all LEDs in the LED module. Through the controller of the LED module, the calibration data transmitted from the calibration host is stored in the memory inside the driver so that all the LEDs will emit light according to the calibration. The present invention improves the uniformity of the light emission and improves the module maintenance convenience.
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Citations
7 Claims
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1. An LED calibration system, comprising:
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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. - View Dependent Claims (2, 3, 4)
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5. An LED calibration method, for using a calibration host to control an image capturing device and a plurality of cascaded LED modules, each said LED module comprising a controller, a plurality of drivers, a memory and an LED array, said LED array having a plurality of LEDs, for obtaining and storing calibration data of said LEDs to said memory, said method comprising the steps of:
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Step A;
switch on, enter step B;Step B;
said controller obtains original data from said memory and transmits to said driver, and enter step C;Step C;
said controller determines whether entering self-test mode, when a self-test enabling of said controller is high, said controller enters self-test mode, and enter step D;
if said self-test enabling is low, then enter step E;Step D;
said controller transmits a default image data to said drivers for said LEDs to display said default image, and returns to step C;Step E;
said controller uses an instruction byte of an instruction data input signal to determine whether entering normal display mode, if to enter normal display mode, then enter step F, otherwise, enter step G for calibration mode;Step F;
capture memory data and transmit to said drivers for performing image calibration to make said LEDs display calibration image and return to step C;Step G;
capture a plurality of data bytes of said instruction data input signal as calibration data of said LEDs and enter step H; andStep H;
store said calibration data into said memory and return to step C to repeat the above steps. - View Dependent Claims (6, 7)
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Specification