Patent ID: 11953803
Assignee: HUAWEI TECHNOLOGIES CO., LTD.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 14:
15. A wavelength selective switch comprising:
optical ports comprising at least one input port for receiving an input beam and at least one output port corresponding to the input port;
a wavelength division multiplexing unit configured to spatially divide the input beam into a plurality of wavelength components; and
a liquid crystal on silicon (LCoS) configured to perform optical output on the plurality of wavelength components in a port direction, the LCoS comprising:
a liquid crystal layer, the liquid crystal layer comprising a plurality of pixel sets, the plurality of pixel sets comprising a first pixel set and a second pixel set; and
a drive circuit configured to: determine a plurality of bit sequences, the plurality of bit sequences comprising a first bit sequence and a second bit sequence; and control a voltage of the first pixel set by using the first bit sequence and control a voltage of the second pixel set by using the second bit sequence, wherein the first pixel set and the second pixel set are in different phase cycles in a port direction of an LCoS two-dimensional array, the first pixel set and the second pixel set having a same phase, and duty ratios of the first bit sequence and the second bit sequence being the same.