Data driving circuit and a display device including the same

A data driving circuit, comprising:

• a latch which receives an output image signal and outputs a latch data signal including a plurality of bits;
• a transition detector which compares the latch data signal of a current line with the latch data signal of a previous line, and outputs a first transition detection signal based on the comparison;
• a delay compensator which outputs a delay data signal obtained by delaying some of the plurality of bits of the latch data signal based on the first transition detection signal;
• a level shifter which outputs a level shift data signal obtained by changing a voltage level of the delay data signal;
• and
• an output circuit which converts the level shift data signal into a data signal and provides the data signal obtained by converting the level shift data signal to a data line,
• wherein the delay compensator includes:
• a counter which counts a number of the first transition detection signal having a first value in the current line to output a first count signal, and counts a number of a second transition detection signal having the first value to output a second count signal;
• a delay controller which outputs a control signal based on a difference value between the first count signal and the second count signal;
• and
• a delay circuit which outputs the delay data signal obtained by delaying some of the plurality of bits of the latch data signal in response to the control signal.

A data driving circuit, comprising:

• a latch which receives an output image signal and outputs a latch data signal including a plurality of bits;
• a transition detector which outputs a first transition detection signal of a first value when the latch data signal of a current line and the latch data signal of a previous line correspond to a first pattern, and outputs a second transition detection signal of the first value when the latch data signal of the current line and the latch data signal of the previous line correspond to a worst pattern;
• a delay compensator which outputs a delay data signal obtained by delaying some of the plurality of bits of the latch data signal based on a difference value between a number of the first transition detection signal having the first value in the current line and a number of the second transition detection signal having the first value in the current line;
• a level shifter which outputs a level shift data signal obtained by changing a voltage level of the delay data signal;
• and
• an output circuit which converts the level shift data signal into a data signal and provides the data signal obtained by converting the level shift data signal to a data line.

A data driving circuit, comprising:

• a latch which receives an image signal and outputs a latch data signal including a plurality of bits;
• a transition detector which compares the latch data signal of a current line with the latch data signal of a previous line, and outputs a first transition detection signal based on the comparison, wherein the first transition detection signal has a first value when the latch data signal of the current line and the latch data signal of the previous line correspond to a predetermined pattern;
• a delay compensator which outputs a delay data signal obtained by delaying some of the plurality of bits of the latch data signal based on the first transition detection signal;
• a level shifter which outputs a level shift data signal obtained by changing a voltage level of the delay data signal;
• and
• an output circuit which converts the level shift data signal into a data signal and provides the data signal obtained by converting the level shift data signal to a data line,
• wherein the predetermined pattern is a pattern in which a most significant bit of the latch data signal of the previous line is a first bit value, each of remaining lower bits except for the most significant bit of the latch data signal of the previous line is a second bit value, a most significant bit of the latch data signal of the current line is the second bit value, and each of remaining lower bits except for the most significant bit of the latch data signal of the current line is the first bit value.