CROSS REFERENCE TO RELATED APPLICATION

This application claims priority from Korean Patent Application No. 10-2020-0172277, filed on Dec. 10, 2020, which is hereby incorporated by reference for all purposes as if fully set forth herein.

BACKGROUND

1. Technical Field

Various embodiments generally relate to a data driving device and a panel driving method of the data driving device.

2. Related Art

In general, a data driving device of a display device converts image data into data voltages and supplies the data voltages to a display panel.

Such a data driving device generates gamma reference voltages for converting the image data into the data voltages.

Because the existing data driving device includes gamma voltage circuits corresponding to R (red), G (green) and B (blue), respectively, the size of the data driving device increases. Therefore, an area occupied by the data driving device in the display device increases.

SUMMARY

Under such a background, in one aspect, various embodiments are directed to providing a technology in which a programmable gamma circuit is applied to a gamma voltage circuit of a data driving device and some components of a channel circuit are used in common, thereby reducing the size of the data driving device.

In one aspect, an embodiment may provide a data driving device including: a gamma voltage circuit configured to output first gamma reference voltages corresponding to a first color during a first horizontal driving period, to output second gamma reference voltages corresponding to a second color during a second horizontal driving period, and to output third gamma reference voltages corresponding to a third color during a third horizontal driving period; and a channel circuit configured to output a first data voltage by using first color data corresponding to the first color and the first gamma reference voltages during the first horizontal driving period, to output a second data voltage by using second color data corresponding to the second color and the second gamma reference voltages during the second horizontal driving period, and to output a third data voltage by using third color data corresponding to the third color and the third gamma reference voltages during the third horizontal driving period.

In another aspect, an embodiment may provide a method for driving a display panel by a data driving device, including: receiving first color data corresponding to all channels of the display panel and a first gamma set value from a data processing device; generating first gamma reference voltages corresponding to a first color by using the first gamma set value during a first horizontal driving period; generating first data voltages by using the first color data and the first gamma reference voltages; supplying the first data voltages to first color pixels disposed on one row of the display panel; receiving second color data corresponding to all the channels of the display panel and a second gamma set value from the data processing device; generating second gamma reference voltages corresponding to a second color by using the second gamma set value during a second horizontal driving period; generating second data voltages by using the second color data and the second gamma reference voltages; supplying the second data voltages to second color pixels disposed on the one row; receiving third color data corresponding to all the channels of the display panel and a third gamma set value from the data processing device; generating third gamma reference voltages corresponding to a third color by using the third gamma set value during a third horizontal driving period; generating third data voltages by using the third color data and the third gamma reference voltages; and supplying the third data voltages to third color pixels disposed on the one row.

As is apparent from the above description, according to the embodiments, a programmable gamma circuit may be applied to a gamma voltage circuit of a data driving device and some components of a channel circuit may be used in common, which makes it possible to reduce the size of the data driving device.

