Demultiplexer and driving method thereof, and display panel having demultiplexer
AssigneeGuangzhou China Star Optoelectronics Semiconductor Display Technology Co., Ltd.
InventorsZhixiong Jiang, Yanhong Meng
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Abstract
Disclosed in the present application is a demultiplexer and a driving method thereof, and a display panel having the demultiplexer. Each output channel is respectively connected to (K−1) data lines through (K−1) switching transistors and directly connected to another data line; each metal electrode plate is disposed nearby to the another data line respectively, so that a feedthrough effect on the another data line is close to that on other (K−1) data lines, thereby achieving better display uniformity on the display panel.
Claims17
A demultiplexer comprising:
- N output channels, each output channel respectively connected to (K−1) data lines through (K−1) switching transistors and directly connected to another data line, wherein (K−1) switching transistors corresponding to each output channel are respectively connected to (K−1) multiplexing control signal lines, N being a positive integer, and K being a positive integer greater than 1;
- N metal electrode plates, the N metal electrode plates connected to each other, and each metal electrode plate stacked with another data line corresponding to each output channel so as to form a coupling capacitance between each metal electrode plate and the another data line corresponding to each output channel.
A method for driving a demultiplexer, comprising following steps of:
- S1, enabling (K−1) multiplexing control signal lines to be provided with high level in sequence during (K−1) periods of each line scan cycle in sequence, so as to enable each output channel to provide data signals to corresponding (K−1) data lines in a time-division manner;
- S2, enabling the (K−1) multiplexing control signal lines to be provided with low level, and coupling capacitance control signal line CUX to be provided with high level at a Kth period of each line scan cycle, so as to enable each output channel to provide a data signal to another data line corresponding to each output channel.
A display panel, comprising a source driver, N*K data lines, and a demultiplexer connected in sequence, wherein the source driver uses a time-division method to input data signals to corresponding K data lines through each output channel of the demultiplexer;
- the demultiplexer comprising:
- N output channels, each output channel respectively connected to (K−1) data lines through (K−1) switching transistors and directly connected to another data line, wherein (K−1) switching transistors corresponding to each output channel are respectively connected to (K−1) multiplexing control signal lines, N being a positive integer, and K being a positive integer greater than 1;
- N metal electrode plates, the N metal electrode plates connected to each other, and each metal electrode plate stacked with another data line corresponding to each output channel so as to form a coupling capacitance between each metal electrode plate and the another data line corresponding to each output channel.
Dependencies are inferred from the claim text.