Patent ID: 8421792
Filing Date: 2013-04-16
Classification: G09G

Abstract:
1. A data transmitting device comprising: a transmitter configured to transmit data using a Low Voltage Differential Signal (“LVDS); and a receiver configured to detect the data from the transmitted LVDS, wherein the transmitter comprises: a reference voltage generator configured to generate and output a reference voltage and a first current; a current generator comprising a plurality of constant current sources connected in parallel and a plurality of switches connected to output terminals of the constant current sources, respectively, the current generator configured to switch the switches independently according to a preset digital current control signal and adding up the currents supplied from the constant current sources via the tuned-on switches to output as a second current; a contact node adding and outputting the first current from the reference voltage generator and the second current from the current generator; a current amplifier configured to amplify and output the added current from the contact node; and a line driver configured to generate and output the LVDS according to the data by using a constant current such as the amplified current of the current amplifier, wherein the line driver comprises: an input constant current source and an output constant current source configured to generate an identical constant current to the amplified current from the current amplifier; and four switches connected between the input and output constant current sources, wherein the four switches form a current loop together with the couple of the transmission lines, between the transmitter and receiver, and the termination resistance between the transmission lines and are selectively switched according to a high level or a low level of the data to output the LVDS, wherein the receiver configured to detect a voltage of the LVDS at the termination resistance by using a comparator and restore the high-level or low-level of the data.