Display driving device
AssigneeSilicon Works Co., Ltd.
InventorsYoung Bok Kim, Beom Rak Choi
Life of this patent
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Abstract
Disclosed is a display driving device capable of determining whether a display panel is shorted, based on a voltage level shared by data lines. The display driving device may include: a data driving unit configured to provide source driving signals to data lines of a display panel in a data output period, and control the data lines to share charges in a charge sharing period; and a short monitoring unit configured to detect a voltage level shared in the charge sharing period, and compare the voltage level with a reference voltage that varies according to the voltage level to monitor whether the display panel is shorted.
Claims14
A display driving device comprising:
- a data driving unit configured to provide source driving signals corresponding to an image data to data lines of a display panel in a data output period, and control switch circuits to share charges of the data lines in a charge sharing period;
- a switch configured to detect a voltage level shared of the data lines in the charge sharing period;
- a comparator configured to compare the voltage level with a reference voltage and output a detection signal corresponding to the comparison result;
- and
- a controller configured to determine whether a short of the data lines according to the detection signal,
- wherein the reference voltage is set to vary according to the voltage level at which the source driving signals corresponding to the image data are shared.
A display driving device comprising:
- a first switch circuit configured to provide source driving signals corresponding to an image data to data lines of a display panel in a data output period;
- a second switch circuit configured to connect the data lines to share charges in a charge sharing period;
- a switch configured to transfer a voltage level of the data lines when the charges of the data lines are shared through the second switch circuit;
- a comparator configured to compare the voltage level with a reference voltage and output a detection signal corresponding to the comparison result;
- and
- a controller configured to determine whether a short of the data lines according to the detection signal,
- wherein the reference voltage is set to vary according to the voltage level at which the source driving signals corresponding to the image data are shared.
A display driving device comprising:
- a data driving unit configured to provide source driving signals corresponding to an image data to data lines of a display panel in a data output period and control switch circuits to share charges of the data lines in a charge sharing period;
- a switch configured to transfer a voltage level which is shared by the data lines through the data driving unit;
- a comparator configured to compare the voltage level with a reference voltage, and output a detection signal corresponding to the comparison result;
- and
- a controller configured to determine whether a short of the data lines, according to the detection signal of the comparator, and output a control signal for powering down the data driving unit, when determining that a short path is present in the display panel,
- wherein the reference voltage is set to vary according to the voltage level at which the source driving signals corresponding to the image data are shared.
Dependencies are inferred from the claim text.