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US 12,744,006 B2Granted
Display device having a plurality of voltage lines in a bezel area and driving method thereof
AssigneeLG Display Co., Ltd.
InventorJaeKyeong Yun
Life of this patent
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Abstract
The present disclosure relates to a display device and a driving method of the display device that are capable of stabilizing the threshold voltage of a driving transistor. The display device may include a display area and a bezel area. First and second switches may be disposed in the bezel area. The first switch may be connected between a first voltage line and a first subpixel, and the second switch may be connected between a second voltage line and the first subpixel. During an initialization period, the first switch may be turned on to supply a first voltage to the first subpixel, and during an emission period, the second switch may be turned on to supply a second voltage to the first subpixel.
Claims21
A display device, comprising:
- a display area in which a plurality of subpixels comprising a first subpixel are disposed;
- a bezel area different from the display area;
- a plurality of voltage lines disposed in the bezel area and comprising a driving voltage line and a base voltage line;
- and
- first and second switches disposed in the bezel area,
- wherein:
- the first switch is electrically connected between the base voltage line and the first subpixel;
- the second switch is electrically connected between a first voltage line among the plurality of voltage lines and the first subpixel;
- the first subpixel comprises a driving transistor configured to drive a light emitting element;
- a driving period of the first subpixel comprises an emission period and an initialization period preceding the emission period;
- during the emission period, the light emitting element is configured to emit light;
- during at least a part of the initialization period, when a data voltage is supplied to a gate node of the driving transistor, one of the first switch and the second switch is on;
- during at least a second part of the initialization period, the data voltage is not supplied to the gate node of the driving transistor;
- the at least a second part of the initialization period is after the at least a part of the initialization period and before the emission period;
- during at least a third part of the initialization period, the data voltage is not supplied to the gate node of the driving transistor, and both of the first switch and the second switch are off;
- and
- the at least a third part of the initialization period is after a previous emission period and before the at least a part of the initialization period.
14 more elements
A driving method of a display device, the driving method comprising:
- providing an initialization period, wherein during at least a portion of the initialization period, a first switch disposed in a bezel area is turned on, and a first voltage is supplied to a first subpixel disposed in a display area;
- and
- providing an emission period, wherein during the emission period, a second switch disposed in the bezel area is turned on, a second voltage is supplied to the first subpixel, and the first subpixel emits light,
- wherein:
- the first subpixel comprises a driving transistor coupled to a light emitting element for emitting light;
- during at least a part of the initialization period, a data voltage is supplied to a gate node of the driving transistor, and the first switch is on;
- during at least a second part of the initialization period, the data voltage is not supplied to the gate node of the driving transistor;
- the at least a second part of the initialization period is after the at least a part of the initialization period and before the emission period;
- during at least a third part of the initialization period, the data voltage is not supplied to the gate node of the driving transistor, and both of the first switch and the second switch are off;
- and
- the at least a third part of the initialization period is after a previous emission period and before the at least a part of the initialization period.
8 more elements
A display device, comprising:
- a display area;
- a bezel area different from the display area;
- a plurality of subpixels disposed in the display area and comprising a first subpixel;
- a plurality of voltage lines disposed in the bezel area and comprising a driving voltage line and a base voltage line;
- and
- first and second switches disposed in the bezel area,
- wherein:
- during a first period, the first switch is configured to provide to the first subpixel a first voltage using a first voltage line among the plurality of voltage lines;
- during a second period, the second switch is configured to provide to the first subpixel a second voltage using a second voltage line among the plurality of voltage lines;
- the first subpixel comprises a driving transistor configured to drive a light emitting element;
- during at least a part of the first period, when a data voltage is supplied to a gate node of the driving transistor, the first switch is on;
- during at least a second part of the first period, the data voltage is not supplied to the gate node of the driving transistor, and both of the first switch and the second switch are off;
- and
- the at least a second part of the first period is after the at least a part of the first period and before the second period;
- during at least a third part of the first period, the data voltage is not supplied to the gate node of the driving transistor, and one of the first switch and the second switch is on;
- and
- the at least a third part of the first period is after the at least a part of the first period and before the at least a second part of the first period.
14 more elements
Dependencies are inferred from the claim text.