Light emitting display device and driving method thereof
Provided is a light emitting display device and a method of driving the same. The light emitting display device includes: a display panel in which pixel lines including a plurality of pixels are divided into at least one area A and at least one area B; a panel driver connected to the pixel line; and a timing controller for controlling operation of the panel driver to perform image data writing (IDW) driving for sequentially writing input image data to a plurality of pixel lines included in one of the area A and the area B and to perform sensing data writing (SDW) driving for writing sensing data to a pixel line included in one of the area A and the area B in a vertical blank period in which image data writing driving is not performed. The timing controller writes coupling compensation data during the vertical blank period. According to the present disclosure, a device can be realized in consideration of a sensing deviation that may be generated in a compensation operation for improving deterioration of elements included in a display panel and increasing the lifespan thereof.
1. A light emitting display device, comprising:
a display panel including pixel lines having a plurality of pixels, the pixel lines being in a first area and a second area;
a panel driver electrically connected to the pixel lines; and
a timing controller configured to control operation of the panel driver to perform image data writing driving for sequentially applying input image data to a plurality of pixel lines included in one of the first area or the second area, and to perform sensing data writing driving for applying sensing data to a pixel line included in the one of the first area or the second area during a vertical blank period in which the image data writing driving is not performed,
wherein the timing controller writes coupling compensation data during the vertical blank period,
wherein the timing controller is configured to perform black data insertion driving for concurrently inserting black image data into a plurality of pixel lines included in the other one of the first area or the second area.
2. The light emitting display device of claim 1 , wherein the coupling compensation data is written subsequent to the input image data and prior to the sensing data.
3. The light emitting display device of claim 1 , wherein a difference between the coupling compensation data and a previous input image data applied before the vertical blank period starts is within a predetermined range.
4. The light emitting display device of claim 3 , wherein the coupling compensation data is the same as the previous input image data applied before the vertical blank period starts.
5. The light emitting display device of claim 1 , wherein an applied state of the coupling compensation data is maintained until the sensing data is applied.
6. The light emitting display device of claim 1 , wherein the pixel lines in the first area and the pixel lines in the second area are sampled at the same time and have different sampling start times.
7. The light emitting display device of claim 1 , wherein the pixel lines in the first area are driven by a gate driver provided with a first clock group and the pixel lines in the second area are driven by a gate driver provided with a second clock group having a phase different from that of the first clock group.
8. The light emitting display device of claim 7 , wherein the timing controller is configured to alternately output black data insertion scan clock signals of the first clock group and black data insertion scan clock signals of the second clock group at least once within one clock cycle.
9. The light emitting display device of claim 1 , wherein:
the timing controller is configured to divide pixel line selection and cancellation signals into a first pixel line selection and cancellation signal and a second pixel line selection and cancellation signal,
the black data insertion driving is performed for the second area and the sensing data writing driving is performed only for the first area when the first pixel line selection and cancellation signal is activated only, and
the black data insertion driving is performed for the first area and the sensing data writing driving is performed only for the second area when the second pixel line selection and cancellation signal is activated only.
10. A light emitting display device, comprising:
a display panel including pixel lines having a plurality of pixels, the pixels lines being in a first area and a second area;
a panel driver electrically connected to the pixel lines; and
a timing controller configured to control operation of the panel driver to perform image data writing driving for sequentially writing input image data to a plurality of pixel lines included in one of the first area or the second area, and to perform sensing data writing driving for writing sensing data to a pixel line included in the one of the first area or the second area during a vertical blank period in which the image data writing driving is not performed,
wherein the timing controller includes a deviation compensator configured to compensate a sensing deviation caused by coupling between horizontal lines and vertical lines in the display panel.
11. The light emitting display device of claim 10 , wherein the pixel lines included in the first area and the pixel lines included in the second area are sampled at the same time and have different sampling start times.
12. The light emitting display device of claim 10 , wherein the timing controller is configured to perform black data insertion driving for concurrently inserting black image data into a plurality of pixel lines included in the other one of the first area or the second area.
13. The light emitting display device of claim 12 , wherein the pixel lines in the first area are driven by a gate driver provided with a first clock group and the pixel lines included in the second area are driven by a gate driver provided with a second clock group having a phase different from that of the first clock group.
14. The light emitting display device of claim 13 , wherein the timing controller is configured to alternately output black data insertion scan clock signals of the first clock group and black data insertion scan clock signals of the second clock group at least once within one clock cycle.
15. The light emitting display device of claim 12 , wherein:
the timing controller is configured to divide pixel line selection and cancellation signals into a first pixel line selection and cancellation signal and a second pixel line selection and cancellation signal,
the black data insertion driving is performed for the second area and the sensing data writing driving is performed only for the first area when the first pixel line selection and cancellation signal is activated only; and
the black data insertion driving is performed for the first area and the sensing data writing driving is performed only for the second area when the second pixel line selection and cancellation signal is activated only.
16. A method of driving a light emitting display device having a display panel including pixel lines having a plurality of pixels, the pixel lines being in a first area and a second area, the method comprising:
performing image data writing driving for sequentially writing input image data to a plurality of pixel lines included in one of the first area or the second area;
performing sensing data writing driving for writing sensing data to a pixel line included in the one of the first area or the second area during a vertical blank period in which image data writing driving is not performed; and
compensating for a sensing deviation caused by coupling between horizontal lines and vertical lines in the display panel.