CN-114787905-B - Light-emitting display device

Abstract

The light emitting display device according to the present invention includes a display panel including a first pixel group composed of a plurality of pixels of 2N rows and a second pixel group arranged next to the first pixel group and composed of a plurality of pixels of 2N rows, and an emission signal unit including a first emission stage for applying the same first emission signal to the first pixel group and a second emission stage for applying the same second emission signal to the second pixel group, wherein a falling time of each of the first emission signals is different from a rising time of each of the second emission signals in a first frame.

Inventors

• JIN ZHENGJI
• Park Junning
• Pu Zaiyou
• ZHAO CHENGMIN
• JIN HENGKUI

Assignees

• 乐金显示有限公司

Dates

Publication Date

20260505

Application Date

20200330

Priority Date

20191231

Claims (15)

1. 1. A light emitting display device comprising: a display panel including a first pixel group including a plurality of pixels of 2N rows and a second pixel group disposed behind the first pixel group and including a plurality of pixels of 2N rows, and An emission signal unit including a first emission stage for applying the same first emission signal to the first pixel group and a second emission stage for applying the same second emission signal to the second pixel group, Wherein in a first frame, a falling time of the first transmission signal and a rising time of the second transmission signal are different from each other, and in a second frame, the falling time of the first transmission signal and the rising time of the second transmission signal are different from each other, Wherein a falling time of the first transmission signal in the first frame and a falling time of the first transmission signal in the second frame are different from each other, Wherein a rise time of the second transmission signal in the first frame and a rise time of the second transmission signal in the second frame are different from each other, Wherein the falling time of the first transmission signal is a time when the first transmission signal is inverted from a high voltage to a low voltage, Wherein the rising time of the second transmission signal is a time when the second transmission signal is inverted from a low voltage to a high voltage, Wherein, in the first frame and the second frame, a falling time of the first transmission signal is one line slower than a rising time of the second transmission signal by a data signal application period.
2. 2. The light emitting display device of claim 1, wherein the first emission stage applies the first emission signal and the second emission stage applies the second emission signal to alternately drive the first frame and the second frame.
3. 3. The light emitting display device according to claim 1, wherein in the first frame, a falling time of the first emission signal is the same as a start time of a data signal application period of a first row of the second pixel group, Wherein, in the first frame, a rising time of the second emission signal is the same as a start time of a data signal application period of a last row of the first pixel group.
4. 4. The light emitting display device according to claim 3, wherein in the second frame, a falling time of the first emission signal is the same as a start time of a data signal application period of the second row of the second pixel group, Wherein, in the second frame, a rising time of the second emission signal is the same as a start time of a data signal application period of the first row of the second pixel group.
5. 5. The light emitting display device of claim 1, further comprising: a plurality of emission signal lines connecting the emission signal units with the plurality of pixels, and A plurality of high-potential voltage lines applying high-potential voltages to the plurality of pixels, Wherein the plurality of emission signal lines and the plurality of high-potential voltage lines overlap and cross each other.
6. 6. The light emitting display device of claim 1, further comprising: a plurality of LEDs disposed in the plurality of pixels.
7. 7. A light emitting display device comprising: a display panel including a plurality of pixel groups in which a plurality of pixels are grouped in units of a plurality of rows, the display panel being configured to drive pixels of odd lines or to drive pixels of even lines, and A gate driver including a scan signal unit for applying a scan signal to the plurality of pixels and an emission signal unit for applying an emission signal to the plurality of pixels, Wherein the emission signal unit is configured to apply the same emission signal to pixels included in the same pixel group among the plurality of pixels, Wherein in a first frame, a time at which a first emission signal applied to a first pixel group of the plurality of pixel groups is inverted from a gate-off voltage to a gate-on voltage and a time at which a second emission signal applied to a second pixel group of the plurality of pixel groups is inverted from the gate-on voltage to the gate-off voltage are different from each other, and in a second frame, a time at which a first emission signal applied to the first pixel group of the plurality of pixel groups is inverted from a gate-off voltage to a gate-on voltage and a time at which a second emission signal applied to the second pixel group of the plurality of pixel groups is inverted from the gate-on voltage to the gate-off voltage are different from each other, such that the display panel is configured to alternately display a first frame in which a dark line is visible and a second frame in which a bright line is visible at a boundary between the plurality of pixel groups, Wherein, in the first frame and the second frame, a time when the first emission signal is inverted from the gate-off voltage to the gate-on voltage is slower than a time when the second emission signal is inverted from the gate-on voltage to the gate-off voltage by one line of a data signal application period.
8. 8. The light emitting display device of claim 7, wherein the display panel is configured to drive the odd-numbered rows of pixels, Wherein in the first frame, a time at which the first emission signal is inverted from the gate-off voltage to the gate-on voltage is the same as a start time of a data signal application period of the first row of the second pixel group, Wherein in the first frame, a time at which the second emission signal is inverted from the gate-on voltage to the gate-off voltage is the same as a start time of a data signal application period of a last row of the first pixel group, Wherein in the second frame, a time at which the first emission signal is inverted from the gate-off voltage to the gate-on voltage is the same as a start time of a data signal application period of a second row of the second pixel group, Wherein, in the second frame, a time at which the second emission signal is inverted from the gate-on voltage to the gate-off voltage is the same as a start time of a data signal application period of the first row of the second pixel group.
9. 9. The light emitting display device of claim 8, wherein the display panel is configured to alternately display the first frame, the second frame, and a third frame, Wherein, in the third frame, a time at which the first emission signal is inverted from the gate-off voltage to the gate-on voltage is the same as a start time of a data signal application period of a second row of the second pixel group; Wherein, in the third frame, a time at which the second emission signal is inverted from the gate-on voltage to the gate-off voltage is the same as a start time of a data signal application period of a last row of the first pixel group.
10. 10. The light emitting display device of claim 7, wherein the display panel is configured to drive the even rows of pixels, Wherein in the first frame, a time at which the first emission signal is inverted from the gate-off voltage to the gate-on voltage is the same as a start time of a data signal application period of a second row of the second pixel group, Wherein in the first frame, a time at which the second emission signal is inverted from the gate-on voltage to the gate-off voltage is the same as a start time of a data signal application period of the first row of the second pixel group, Wherein in the second frame, a time at which the first emission signal is inverted from the gate-off voltage to the gate-on voltage is the same as a start time of a data signal application period of the first row of the second pixel group, Wherein, in the second frame, a time at which the second emission signal is inverted from the gate-on voltage to the gate-off voltage is the same as a start time of a data signal application period of a last row of the first pixel group.
11. 11. The light emitting display device of claim 10, wherein the display panel is configured to alternately display the first frame, the second frame, and a third frame, Wherein, in the third frame, a time at which the first emission signal is inverted from the gate-off voltage to the gate-on voltage and a time at which the second emission signal is inverted from the gate-on voltage to the gate-off voltage are the same as a start time of a data signal application period of the first row of the second pixel group.
12. 12. The light emitting display device of claim 7, further comprising: a plurality of emission signal lines connecting the emission signal units with the plurality of pixels, and A high-potential voltage line applying a high-potential voltage to the plurality of pixels, Wherein when the transmission signals transmitted through the plurality of transmission signal lines fall or rise, a ripple occurs in the high-potential voltage transmitted through the high-potential voltage line.
13. 13. A light emitting display device comprising: a display panel including a first pixel group including a plurality of pixels of 2N rows and a second pixel group disposed behind the first pixel group and including a plurality of pixels of 2N rows, and An emission signal unit including a first emission stage for applying the same first emission signal to the first pixel group and a second emission stage for applying the same second emission signal to the second pixel group, Wherein in a first frame, a falling time of the first transmission signal and a rising time of the second transmission signal are different from each other, and in a second frame, the falling time of the first transmission signal and the rising time of the second transmission signal are different from each other, Wherein a falling time of the first transmission signal in the first frame and a falling time of the first transmission signal in the second frame are different from each other, Wherein a rise time of the second transmission signal in the first frame and a rise time of the second transmission signal in the second frame are different from each other, and Wherein the first transmit stage applies the first transmit signal and the second transmit stage applies the second transmit signal to alternately drive the first frame and the second frame, Wherein, in the first frame and the second frame, a falling time of the first transmission signal is one line slower than a rising time of the second transmission signal by a data signal application period.
14. 14. The light emitting display device according to claim 13, wherein in the first frame, a falling time of the first emission signal is the same as a start time of a data signal application period of a first row of the second pixel group, Wherein, in the first frame, a rising time of the second emission signal is the same as a start time of a data signal application period of a last row of the first pixel group.
15. 15. The light emitting display device according to claim 14, wherein in the second frame, a falling time of the first emission signal is the same as a start time of a data signal application period of a second row of the second pixel group, Wherein, in the second frame, a rising time of the second emission signal is the same as a start time of a data signal application period of the first row of the second pixel group.

Description

Light-emitting display device Technical Field The present invention relates to a light emitting display device, and more particularly, to a light emitting display device capable of preventing a boundary between pixel groups from being visible when driving a unit of the pixel groups. Background Currently, with the entry into the general information age, the field of display devices that visually express electric information signals has rapidly progressed, and research is being continuously conducted to improve the performance of various display devices, for example, thin thickness, light weight, and low power consumption. Among various display devices, a light emitting display device is a self-luminous display device, and unlike a liquid crystal display device, the light emitting display device can be made light and thin since a separate light source is not required. In addition, since the light emitting display device has advantages in power consumption due to low voltage driving and is also excellent in color realization, response speed, viewing angle, and Contrast (CR), it is expected to be utilized in various fields. Disclosure of Invention [ Technical problem ] The light emitting display device may be driven in such a manner that the pixels emit light in units of rows in response to a scan signal applied in units of rows. However, recently, in order to achieve the efficiency and high luminance of the light emitting element, a driving method is also used in which all pixels are grouped in a specific number of row units and light is emitted simultaneously in pixel group units. However, the inventors of the present invention have recognized a problem that when a driving method that allows pixels to simultaneously emit light in pixel groups is used, a dark line or a bright line at the boundary between the pixel groups is visible to a user. Specifically, even if the falling time and the rising time of the emission signals of the adjacent pixel groups are the same point in time, when the emission signal lines transmitting the emission signals and the high-potential voltage lines cross each other, a ripple may occur in the high-potential voltage transmitted by the high-potential voltage lines due to the falling or rising of the emission signals transmitted by the emission signal lines. Due to the ripple phenomenon of the high potential voltage, dark lines or bright lines may be visible at the boundaries between the pixel groups. Accordingly, the inventors of the present invention have found a new light emitting display device capable of preventing the boundary between pixel groups from being visible when driving the cells of the pixel groups. An object of the present invention is to provide a light emitting display device capable of solving a problem that a dark line or a bright line is visible at a boundary between pixel groups when driving a unit of the pixel groups. In addition, another object of the present invention is to provide a light emitting display device capable of preventing a luminance deviation from occurring at a boundary of a pixel group when using a display panel configured to drive pixels arranged in odd lines or to drive pixels arranged in even lines. The objects of the present disclosure are not limited to the above objects, and other objects not mentioned above may be clearly understood by those skilled in the art from the following description. Technical scheme A light emitting display device according to an embodiment of the present invention includes a display panel including a first pixel group including a plurality of pixels of 2N rows and a second pixel group disposed behind the first pixel group and including a plurality of pixels of 2N rows, and an emission signal unit including a first emission stage for applying the same first emission signal to the first pixel group and a second emission stage for applying the same second emission signal to the second pixel group, wherein a falling time of the first emission signal and a rising time of the second emission signal are different from each other in a first frame, wherein the falling time of the first emission signal is a time when the first emission signal is inverted from a high voltage to a low voltage, and wherein the rising time of the second emission signal is a time when the second emission signal is inverted from the low voltage to the high voltage. A light emitting display device according to another embodiment of the present invention includes a display panel including a plurality of pixel groups in which a plurality of pixels are grouped in units of a plurality of rows, the display panel configured to drive pixels of odd rows or to drive pixels of even rows, and a gate driver including a scan signal unit for applying a scan signal to the plurality of pixels and an emission signal unit for applying an emission signal to the plurality of pixels, wherein the emission signal unit is configured to apply the same emission signa