The device used the cheap CCD camera and visible light led and infrared ray led.
该装置采用低廉ccd摄像机，配以可见和红外发光二极管组成。
The metal pattern formed on the circuit region or the display region is able to reflect light ray for identification device to identify.
该金属图案可形成于电路区中或显示区中，并可反射光线而供一辨识器材辨识之用。
The metal pattern formed on the circuit region or the display region is able to reflect light ray for identification device to identify.
该金属图案可形成于电路区中或显示区中，并可反射光线而供一辨识器材辨识之用。
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