Frequency variable display device and flicker compensation method of the same
AssigneeLG Display Co., Ltd.
InventorsSeok Min Choi, Jin Sang Lee, Moo Kyoung Hong
Life of this patent
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Abstract
A frequency variable display apparatus includes a display panel where a plurality of subpixels are provided, an image driving circuit configured to write an input image in the plurality of subpixels in a vertical active period, where a data enable signal swings, of one frame to implement target luminance in the plurality of subpixels, and a flicker compensation circuit configured to cause a leakage current flowing from the plurality of subpixels to signal lines corresponding thereto in a vertical blank period, where the data enable signal does not swing, of the one frame to implement flicker compensation luminance which is lower than the target luminance in the plurality of subpixels.
Claims14
A frequency variable display apparatus, comprising:
- a display panel including a plurality of subpixels;
- an image driving circuit configured to write an input image in the plurality of subpixels in a vertical active period of a frame to implement a target luminance in the plurality of subpixels, in response to that a data enable signal swings;
- and
- a flicker compensation circuit configured to cause a leakage current to flow from the plurality of subpixels to signal lines corresponding thereto in a vertical blank period of the frame to implement a flicker compensation luminance which is lower than a target luminance in the plurality of subpixels, in response to that the data enable signal does not swing,
- wherein the flicker compensation circuit is configured to output a gate-off control voltage so as to cause a leakage current to flow from the plurality of subpixels to the signal lines corresponding thereto in the vertical blank period, and
- wherein the gate-off control voltage is used to generate a 3-level scan signal along with a gate on voltage and a gate off voltage, and the gate-off control voltage is lower than the gate on voltage and higher than the gate off voltage.
A flicker compensation method of a frequency variable display apparatus including a display panel that include a plurality of subpixels, the flicker compensation method comprising:
- writing an input image in the plurality of subpixels in a vertical active period of a frame to implement a target luminance in the plurality of subpixels, when a data enable signal swings;
- and
- outputting a gate-off control voltage so as to cause a leakage current to flow from the plurality of subpixels to signal lines corresponding thereto in a vertical blank period of the frame to implement a flicker compensation luminance which is lower than the target luminance in the plurality of subpixels, when the data enable signal does not swing,
- wherein the gate-off control voltage is used to generate a 3-level scan signal along with a gate on voltage and a gate off voltage, and the gate-off control voltage is lower than the gate on voltage and higher than the gate off voltage.
Dependencies are inferred from the claim text.