DIFFERENTIAL SIGNALING SYSTEM AND FLAT PANEL DISPLAY WITH THE SAME
First Claim
1. A differential signaling system comprising:
- a first wire and a second wire connected to a sending end and a receiving end as a differential signal line;
a termination resistor connected between the first wire and the second wire adjacent to the receiving end; and
a programmable compensation circuit connected to the termination resistor in parallel, wherein the programmable compensation circuit includes;
n switches M1, M2, . . . , Mn for receiving each bit of an input digital control signal through a plurality of gates thereof,n first capacitors C11, C12, . . . , C1n including a first electrode connected to a source electrode of each of the switches, and a second electrode connected to the first wire, andn second capacitors C21, C22, . . . , C2n including a first electrode connected to a drain electrode of each of the switches, and a second electrode connected to the second wiring.
3 Assignments
0 Petitions
Accused Products
Abstract
A differential signaling system where a first wire and a second wire are connected to a sending end and a receiving end of a differential signal line. A termination resistor is connected between the first wire and the second wire adjacent to the receiving end. A programmable compensation circuit is connected to the termination resistor in parallel. The programmable compensation circuit includes: a plurality of switches for receiving each bit of an input digital control signal through a gate thereof; a plurality of first capacitors including a first electrode connected to a source electrode of each of the switches, and a second electrode connected to the first wire; and a plurality of second capacitors including a first electrode connected to a drain electrode of each of the switches, and a second electrode connected to the second wire.
-
Citations
15 Claims
-
1. A differential signaling system comprising:
-
a first wire and a second wire connected to a sending end and a receiving end as a differential signal line; a termination resistor connected between the first wire and the second wire adjacent to the receiving end; and a programmable compensation circuit connected to the termination resistor in parallel, wherein the programmable compensation circuit includes; n switches M1, M2, . . . , Mn for receiving each bit of an input digital control signal through a plurality of gates thereof, n first capacitors C11, C12, . . . , C1n including a first electrode connected to a source electrode of each of the switches, and a second electrode connected to the first wire, and n second capacitors C21, C22, . . . , C2n including a first electrode connected to a drain electrode of each of the switches, and a second electrode connected to the second wiring. - View Dependent Claims (2, 3, 4, 5)
-
-
6. A flat panel display comprising:
-
a display panel in which a plurality of data wires and gate wires are arranged to intersect each other; a controller to receive an image signal from an exterior source and generate a control signal, output the control signal, and output the image signal through the first and second wires as a differential signal line; a gate driver for receiving the control signal from the controller and applying a scan signal to the gate wires; and a plurality of data driving circuits, each data driving circuit including a programmable compensation circuit connected to a termination resistor in parallel installed between the first and second wires, to automatically control the impedance of the data driving circuit corresponding to a differential impedance value by the differential signal line, each of the data driving circuits including a data driver to receive an image signal and/or a control signal from the controller through the first and second wires and applying the image signal to the data wires, wherein the programmable compensation circuit includes; n switches M1, M2, . . . , Mn to receive each bit of an input digital control signal through a plurality of gates thereof, n first capacitors C11, C12, . . . , C1n including a first electrode connected to a source electrode of each of the switches, and a second electrode connected to the first wire, and n second capacitors C21, C22, . . . , C2n including a first electrode connected to a drain electrode of each of the switches, and a second electrode connected to the second wire. - View Dependent Claims (7, 8, 9, 10)
-
-
11. A method of matching impedances in a flat display panel comprising a display panel, a plurality of data wires, a controller, a data driver and a plurality of data driving circuits within the data driver each data driving circuit including a programmable compensation circuit connected in parallel to a termination resistor, the method comprising:
-
receiving an image signal from an exterior source into the controller; outputting the image signal from the controller through a pair of the plurality of data wires as a differential signal line to the plurality of data driving circuits including the respective programmable compensation circuit connected in parallel to a respective termination resistor; automatically controlling the impedance value of each data driving circuit to correspond to a differential impedance value in the differential signal line through a series of switches and capacitors in the respective programmable compensation circuit; and transmitting the image signal to the flat display panel, wherein each programmable compensation circuit includes; n switches M1, M2, . . . , Mn for receiving each bit of the image signal through a plurality of gates thereof, n first capacitors C11, C12, . . . , C1n including a first electrode connected to a source electrode of each of the switches, and a second electrode connected to a first wire of the pair of data wires, and n second capacitors C21, C22, . . . , C2n including a first electrode connected to a drain electrode of each of the switches, and a second electrode connected to a second wire of the pair of data wires. - View Dependent Claims (12, 13, 14, 15)
-
Specification