Digital display whiteness appearance

The utility model provides a digital display whiteness appearance is including the silicon photocell sampling circuit, rearmounted amplifier circuit, two integrating circuit, singlechip and the display circuit that connect gradually, two integrating circuit still are connected with circuit for generating a reference voltage, are provided with positive reverse integrated signal change over switch in two integrating circuit, positive reverse integrated signal change over switch receives single chip microcomputer control. " the zero set " and " correction " of whiteness appearance is realized tothe signal that this whiteness appearance adopted the singlechip to receive and handle two integrating circuit feedbacks to the whiteness value is calculated in logical relationship's conversion, andfundamentally eliminates the instability who is brought by components and parts self characteristic. 本实用新型提供的数显式白度仪包括依次连接的硅光电池采样电路、后置放大电路、双积分电路、单片机和显示电路，所述双积分电路还连接有基准电压产生电路，双积分电路内设置有正反向积分信号切换开关，所述正反向积分信号切换开关受单片机控制。该白度仪采用单片机接收并