Foldable display device
AssigneeLG Display Co., Ltd.
InventorsJooHee Lee, Jin Jeon, DaeSeok Oh, Jinwoo Jung
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Abstract
According to an aspect of the present disclosure, a foldable display device includes a display panel including a plurality of display areas divided by a folding line; and a data integrated circuit outputting a data voltage to the plurality of display areas, wherein the data integrated circuit includes a timing controller outputting a gamma enable signal; a data processor processing an image data; a gamma voltage generator determining whether or not to output a plurality of gamma voltages according to the gamma enable signal; and a digital analog converter (DAC) outputting the gamma voltage, as the data voltage corresponding to a gray value of the image data.
Claims15
A foldable display device, comprising:
- a display panel including a plurality of display areas divided by a folding line;
- and
- a data integrated circuit outputting a data voltage to the plurality of display areas,
- wherein the data integrated circuit includes:
- a timing controller outputting a gamma enable signal;
- a data processor processing an image data;
- a gamma voltage generator determining whether or not to output a plurality of gamma voltages according to the gamma enable signal;
- and
- a digital analog converter (DAC) outputting the gamma voltage, as the data voltage corresponding to a gray value of the image data;
- wherein the gamma voltage generator includes:
- a plurality of resistance strings setting the plurality of gamma voltages by dividing a gamma reference voltage;
- a plurality of output buffers outputting the plurality of gamma voltages;
- and
- a plurality of buffer transistors controlling the plurality of output buffers,
- wherein each of the plurality of buffer transistors includes:
- a gate electrode to which the gamma enable signal is applied;
- a first electrode to which a buffer driving voltage is applied;
- and
- a second electrode connected to a voltage supply terminal of each of the plurality of output buffers.
A foldable display device, comprising:
- a display panel dividedly driven in a first period in which a first display area is driven and a second period in which a second display area is driven;
- and
- a data integrated circuit outputting a data voltage to the first display area and the second display area and including a gamma voltage generator,
- wherein when the display panel is in a folded state, the gamma voltage generator outputs a plurality of gamma voltages according to a gamma enable signal in one of the first period and the second period,
- wherein the gamma voltage generator includes:
- a plurality of resistance strings setting the plurality of gamma voltages by dividing a gamma reference voltage;
- a plurality of output buffers outputting the plurality of gamma voltages;
- and
- a plurality of buffer transistors applying a buffer driving voltage to the plurality of output buffers according to the gamma enable signal.
A driving method for a foldable display device according to any one of the preceding claims, the driving method comprising:
- selectively drive the display panel in a first period in which a first display area is driven and a second period in which a second display area is driven;
- wherein, when the display panel is in a folded state, outputting the gamma enable signal at a turn-on level in one of the first period and the second period and outputting the gamma enable signal at a turn-off level in the other one of the first period and the second period.
Dependencies are inferred from the claim text.