Patent ID: 11915636
Assignee: NOVATEK MICROELECTRONICS CORP.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 0:
1. A gamma voltage generator, connected with a plurality of channel circuits and used for outputting a predetermined number of gamma voltages, each channel circuit selecting at least one gamma voltage according to input display data to generate a corresponding data voltage, wherein, the gamma voltage generator comprises:
a gamma voltage generating circuit, having a plurality of first voltage input end nodes, a plurality of second voltage input end nodes, and a plurality of voltage output end nodes;
a plurality of basic buffers, each basic buffer having an input end for receiving a corresponding gamma reference voltage, and an output end connected to a corresponding first voltage input end node; and
a plurality of dynamic buffers, each dynamic buffer having an input end for receiving a corresponding gamma reference voltage, and an output end connected to a corresponding second voltage input end node, wherein each dynamic buffer is configured to operate in a first mode or a second mode, and wherein each dynamic buffer does not output a buffer voltage when operating in the first mode, and outputs the buffer voltage to the corresponding second voltage input end node which the dynamic buffer is connected to when operating in the second mode,
wherein, at least a part of dynamic buffers of the plurality of dynamic buffers are configured to:
switch to operate in the second mode, in response to a voltage at an input end of any one dynamic buffer of the plurality of dynamic buffers being different from a voltage at the corresponding second voltage input end node which the one dynamic buffer is connected to, and switch to operate in the first mode, after a predetermined period or in response to voltages at the input end nodes of all dynamic buffers being the same as voltages at the plurality of second voltage input end nodes.