CPC G09G 3/20 (2013.01) [G09G 2310/0286 (2013.01); G09G 2310/0297 (2013.01); G09G 2320/0626 (2013.01); G09G 2360/144 (2013.01); G09G 2360/16 (2013.01)] | 18 Claims |
1. A detection circuit, comprising:
a conversion circuit configured to acquire a photoelectric sensing signal in real time and convert the acquired photoelectric sensing signal into a luminance value;
a storage circuit connected to the conversion circuit and configured to store N luminance values from the conversion circuit on a first input first output basis;
a discrimination circuit connected to the storage circuit and configured to determine whether at least two luminance values of the N luminance values meet a preset condition; and
an output circuit connected to the discrimination circuit and the storage circuit, and configured to output a preset default luminance value in response to the at least two luminance values meeting the preset condition and output at least one of the N luminance values in response to the at least two luminance values not meeting the preset condition;
wherein the discrimination circuit comprises: a first discrimination sub-circuit connected to the storage circuit and configured to determine whether at least one luminance value of the N luminance values is less than a preset reference luminance value; and a second discrimination sub-circuit connected to the storage circuit and configured to determine whether a difference between the at least two luminance values of the N luminance values exceeds a preset reference luminance difference.
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