Back to results
US 2024/0177642 A1Published application
Charge sharing driver circuit for display and operating method thereof
AssigneeLx Semicon Co., Ltd.
InventorsChung Min LEE, Jong Min PARK, Jung Min CHOI
Life of this patent
Estimating the term…
Abstract
Disclosed are a driver circuit for a display, which is capable of a two-stage charge sharing operation, and an operating method thereof.
Claims20
A charge sharing driver circuit for a display, comprising:
- an output buffer unit 210 configured to buffer a pair of input signals;
- a first output node and a second output node VOUT1 and VOUT2 connected to a display panel;
- an output MUX unit 220 configured to electrically connect the first output node and the output buffer unit, and the second output node and the output buffer unit;
- and
- an output switching unit 230 connected between the first output node and the second output node,
- wherein a first switching element of the output switching unit is connected between the first output node and a common node, a second switching element of the output switching unit is connected between the common node and a ground, and a third switching element of the output switching unit is connected between the second output node and the common node.
3 more elements
A charge sharing driver circuit for a display, comprising:
- an output buffer unit 210 comprising a first buffer amplifier 211 and a second buffer amplifier 212;
- a first output node VOUT1 and a second output node VOUT2 electrically connected to a display panel;
- an output MUX unit 220;
- and
- an output switching unit 230 disposed between the first output node and the second output node,
- wherein the output switching unit performs a switching operation by dividing, into two intervals, an interval in which a transfer of a signal from the output MUX unit is not present.
3 more elements
An operating method of a charge sharing driver circuit for a display, the operating method comprising:
- transferring, by an output buffer unit 210, a pair of input signals;
- transferring, by an output MUX unit 220, the transferred signal to a pair of output nodes by using direct transfer paths through a first transfer switch and a second transfer switch during a frame interval having a normal polarity and using cross transfer paths through a third transfer switch and a fourth transfer switch during a frame interval having an inverted polarity;
- and
- performing, by an output switching unit 230, a first stage for charge sharing between a voltage level of a first output node, among the pair of output nodes, and a ground voltage and a second stage for charge sharing between the voltage level of the first output node and a voltage level of a second output node, among the pair of output nodes, during a margin interval.
1 more element
Dependencies are inferred from the claim text.