Display device and multiplexer thereof
A display device comprises a plurality of pixels and a plurality of multiplexers. Each of the plurality of multiplexers is coupled with N data lines, and configured to receive N−1 switching signals and a data signal. N is a positive integer larger than or equal to 3, and each of the N data lines is coupled with one column of pixels of the plurality of pixels. When any of the N−1 switching signals has an enabling voltage level, the multiplexer is disabled from transmitting the data signal to an N-th data line of the N data lines. When each of the N−1 switching signals has a disabling voltage level, the multiplexer transmits the data signal to the N-th data line.
1. A display device, comprising a plurality of pixels, and further comprising:
a plurality of multiplexers, wherein each of the plurality of multiplexers is coupled with N data lines, and configured to receive N−1 switching signals and a data signal, wherein each of the plurality of multiplexers comprises:
N−1 current-dividing switches, wherein each of the N−1 current-dividing switches comprises a first node, a second node, and a control node, wherein the first nodes of the N−1 current-dividing switches are respectively coupled with a first data line through an (N−1)-th data line of the N data lines, the second nodes of the N−1 current-dividing switches are configured to receive the data signal, and the control nodes of the N−1 current-dividing switches are configured to respectively receive the N−1 switching signals; and
a current-dividing circuit, configured to receive the N−1 switching signals and the data signal, coupled with the N-th data line, and comprising a driving transistor and a NOR gate, wherein a first node of the driving transistor is coupled with an N-th data line of the N data line, and a second node of the driving transistor is configured to receive the data signal, wherein N−1 input nodes of the NOR gate are configured to respectively receive the N−1 switching signals, and an output node of the NOR gate is coupled with a control node of the driving transistor,
wherein N is a positive integer larger than or equal to 3, and each of the N data lines is coupled with one column of pixels of the plurality of pixels,
wherein when any of the N−1 switching signals has an enabling voltage level, the current-dividing circuit is disabled from transmitting the data signal to the N-th data line and the multiplexer sequentially transmits the data signal to the first data line through the (N−1)-th data line,
when each of the N−1 switching signals has a disabling voltage level, the current-dividing circuit transmits the data signal to the N-th data line and the multiplexer is disabled from transmitting the data signal to the first data line through the (N−1)-th data line.
2. The display device of claim 1 , wherein the NOR gate comprises:
a pull-up element, comprising a first node and a second node, wherein the first node of the pull-up element is configured to receive a first reference voltage, and the second node of the pull-up element is coupled with a first nodal point; and
N−1 pull-down transistors, wherein each of the N−1 pull-down transistors comprises a first node, a second node, and a control node, the first node of the pull-down transistor is coupled with the first nodal point, the second node of the pull-down transistor is configured to receive a second reference voltage, and the control node of the pull-down transistor is coupled with one of the N−1 input nodes of the NOR gate,
wherein the first nodal point is coupled with the output node of the NOR gate.
3. The display device of claim 2 , wherein the pull-up element comprises:
a pull-up transistor, comprising a first node, a second node, and a control node, wherein the first node of the pull-up transistor is coupled with the control node of the pull-up transistor, the first node of the pull-up transistor is configured to receive the first reference voltage, and the second node of the pull-up transistor is coupled with the first nodal point.
4. The display device of claim 2 , wherein the pull-up element comprises:
a current-limiting resistor, comprising a first node and a second node, wherein the first node of the current-limiting resistor is configured to receive the first reference voltage, and the second node of the current-limiting resistor is coupled with the first nodal point.
5. A multiplexer, applicable to a display device comprising a plurality of pixels, wherein the multiplexer is coupled with N data lines, and configured to receive N−1 switching signals and a data signal, wherein the multiplexer comprises:
N−1 current-dividing switches, wherein each of the N−1 current-dividing switches comprises a first node, a second node, and a control node, wherein the first nodes of the N−1 current-dividing switches are respectively coupled with a first data line through an (N−1)-th data line of the N data lines, the second nodes of the N−1 current-dividing switches are configured to receive the data signal, and the control nodes of the N−1 current-dividing switches are configured to respectively receive the N−1 switching signals; and
a current-dividing circuit, configured to receive the N−1 switching signals and the data signal, coupled with the N-th data line, and comprising a driving transistor and a NOR gate, wherein a first node of the driving transistor is coupled with an N-th data line of the N data line, and a second node of the driving transistor is configured to receive the data signal, wherein N−1 input nodes of the NOR gate are configured to respectively receive the N−1 switching signals, and an output node of the NOR gate is coupled with a control node of the driving transistor,
wherein N is a positive integer larger than or equal to 3, and each of the N data lines is coupled with a column of pixels of the plurality of pixels,
wherein when any of the N−1 switching signals has an enabling voltage level, the current-dividing circuit is disabled from transmitting the data signal to the N-th data line and the multiplexer sequentially transmits the data signal to the first data line through the (N−1)-th data line,
when each of the N−1 switching signals has a disabling voltage level, the current-dividing circuit transmits the data signal to the N-th data line and the multiplexer is disabled from transmitting the data signal to the first data line through the (N−1)-th data line.
6. The multiplexer of claim 5 , wherein the NOR gate comprises:
a pull-up element, comprising a first node and a second node, wherein the first node of the pull-up element is configured to receive a first reference voltage, and the second node of the pull-up element is coupled with a first nodal point; and
N−1 pull-down transistors, wherein each of the N−1 pull-down transistors comprises a first node, a second node, and a control node, the first node of the pull-down transistor is coupled with the first nodal point, the second node of the pull-down transistor is configured to receive a second reference voltage, and the control node of the pull-down transistor is coupled with one of the N−1 input nodes of the NOR gate,
wherein the first nodal point is coupled with the output node of the NOR gate.
7. The multiplexer of claim 6 , wherein the pull-up element comprises:
a pull-up transistor, comprising a first node, a second node, and a control node, wherein the first node of the pull-up transistor is coupled with the control node of the pull-up transistor, the first node of the pull-up transistor is configured to receive the first reference voltage, and the second node of the pull-up transistor is coupled with the first nodal point.
8. The multiplexer of claim 6 , wherein the pull-up element comprises:
a current-limiting resistor, comprising a first node and a second node, wherein the first node of the current-limiting resistor is configured to receive the first reference voltage, and the second node of the current-limiting resistor is coupled with the first nodal point.