公开(公告)号：US11462169B2

公开(公告)日：2022-10-04

申请号：US17307969

申请日：2021-05-04

Applicant: Samsung Display Co., Ltd.

Inventor： Hyo Jin Lee ,  Sangan Kwon ,  Jin Young Roh ,  Sehyuk Park

IPC: G09G3/3258 ,  G09G3/3233

Abstract: A pixel of a display device includes a capacitor; a light emitting diode; and first, second, third, and fourth transistors. The display device has a normal frequency mode and a low frequency mode. Two electrodes of the capacitor are respectively connected to a first voltage source and a gate node. A gate electrode of the first transistor is connected to the gate node. In a hold period in the low frequency mode, both the second and third transistors receive a scan signal, the third transistor diode-connects the first transistor, the fourth transistor receives an initialization signal and transfers an initialization voltage to the gate node, the scan signal is at a first off voltage level, and the initialization signal is at a second off voltage level unequal to the first off voltage level. The cathode of the light emitting diode is connected to a second voltage source.

公开(公告)号：US11417264B2

公开(公告)日：2022-08-16

申请号：US17320372

申请日：2021-05-14

Applicant: SAMSUNG DISPLAY CO., LTD.

Inventor： Jae Keun Lim ,  Jin Young Roh ,  Se Hyuk Park ,  Hyo Jin Lee

IPC: G09G3/20

Abstract: A scan driver stage including: a first transistor including a gate connected to a first clock, a first electrode connected to a carry terminal, and a second electrode connected to a first node; a second transistor including a gate connected to a second clock, a first electrode connected to a carry terminal, and a second electrode connected to the first node; a third transistor including a gate connected to the first node and a first electrode connected to a second node; a fourth transistor including a gate connected to the second clock, a first electrode connected to power, and a second electrode connected to the second node; a fifth transistor including a gate connected to the first clock, a first electrode connected to power, and a second electrode connected to the second node; and an output outputting first and second scan signals based on first and second node voltages.

公开(公告)号：US11081045B2

公开(公告)日：2021-08-03

申请号：US15981586

申请日：2018-05-16

Applicant: Samsung Display Co. Ltd.

Inventor： Se Hyuk Park ,  Hyo Jin Lee

IPC: G09G3/32 ,  H01L27/15 ,  H01L27/12 ,  H01L33/62 ,  H01L33/36 ,  H01L33/32 ,  H01L33/06 ,  H01L33/44

Abstract: A display device includes a first switching element including a second electrode and a first gate electrode, a second switching element including a third electrode connected with the first gate electrode, a third switching element including a fifth electrode connected with the second electrode, and sixth electrode, a fourth switching element including a seventh electrode connected with the second electrode, and an eighth electrode, a fifth switching element including a ninth electrode connected with the second electrode, and a tenth electrode, a first light emitting diode connected with the sixth electrode and the eighth electrode, a second light emitting diode connected with the eighth electrode and the sixth electrode, and a switch selectively connecting a common power source line with the sixth electrode or the eighth electrode. The first light emitting diode and the second light emitting diode have different polarities from each other with respect to a same direction.

公开(公告)号：US10984707B2

公开(公告)日：2021-04-20

申请号：US16841239

申请日：2020-04-06

Applicant: SAMSUNG DISPLAY CO., LTD.

Inventor： Hyo Jin Lee ,  Se Hyuk Park

IPC: G09G3/32

Abstract: A pixel includes: a first transistor configured to generate a driving current corresponding to a data signal transmitted from a corresponding data line; a first light emitting diode (LED) including a cathode connected to a first power supply line and an anode connected to a second power supply line, and configured to emit light by the driving current; a second light emitting diode (LED) including a cathode connected to the second power supply line and an anode connected to the first power supply line, and configured to emit light by the driving current; a second transistor connected to the anode of the first light emitting diode (LED), and configured to transmit the driving current to the first light emitting diode (LED); and a third transistor connected to the anode of the second light emitting diode (LED), and configured to transmit the driving current to the second light emitting diode (LED.

公开(公告)号：US20210110771A1

公开(公告)日：2021-04-15

申请号：US16868463

申请日：2020-05-06

Applicant: Samsung Display Co., Ltd.

Inventor： Hyo Jin Lee ,  Sangan Kwon ,  Jin Young Roh ,  Sehyuk Park

IPC: G09G3/3258

Abstract: A pixel of a display device includes a capacitor; a light emitting diode; and first, second, third, and fourth transistors. The display device has a normal frequency mode and a low frequency mode. Two electrodes of the capacitor are respectively connected to a first voltage source and a gate node. A gate electrode of the first transistor is connected to the gate node. In a hold period in the low frequency mode, both the second and third transistors receive a scan signal, the third transistor diode-connects the first transistor, the fourth transistor receives an initialization signal and transfers an initialization voltage to the gate node, the scan signal is at a first off voltage level, and the initialization signal is at a second off voltage level unequal to the first off voltage level. The cathode of the light emitting diode is connected to a second voltage source.

公开(公告)号：US10964270B2

公开(公告)日：2021-03-30

申请号：US16817527

申请日：2020-03-12

Applicant: Samsung Display Co., Ltd.

Inventor： Ji Woong Kim ,  Oh Jo Kwon ,  Hyo Jin Lee ,  Se Hyuk Park

IPC: G09G3/3266 ,  G09G3/3291

Abstract: A method of driving a pixel including: during a first period of a first frame, applying a first scan signal having a turn-on level to the first scan line, applying a data voltage to a data line, and applying a second scan signal having the turn-on level to the second scan line; and during a second period of a second frame, applying the first scan signal having the turn-on level to the first scan line, applying a bias voltage to the data line, and applying the second scan signal having a turn-off level to the second scan line, the second frame is a frame subsequent to the first frame, the second period is longer than the first period, and a light-emitting diode emits light at luminance based on the data voltage during at least a portion of the first frame and at least a portion of the second frame.

公开(公告)号：US12211445B2

公开(公告)日：2025-01-28

申请号：US16299336

申请日：2019-03-12

Applicant: SAMSUNG DISPLAY CO., LTD.

Inventor： Hyo Jin Lee ,  Hui Nam ,  Se Hyuk Park

IPC: G11C19/28 ,  G06F1/32 ,  G09G3/20 ,  G09G3/3258 ,  G09G3/3266 ,  G09G3/3291 ,  H10K59/131

Abstract: A driving device includes: an output unit configured to supply a first voltage, or a second voltage lower than the first voltage, to an output terminal in response to a voltage of a first node and a voltage of a second node; a first driver configured to control the voltage of the second node in response to a signal of a first input terminal and a signal of a second input terminal; a second driver configured to control the voltage of the first node in response to a voltage of a third input terminal and the voltage of the second node; and a first transistor configured to apply a third voltage lower than the first voltage to the first node or the second node.

公开(公告)号：US11626074B2

公开(公告)日：2023-04-11

申请号：US17283430

申请日：2019-08-26

Applicant: SAMSUNG DISPLAY CO., LTD.

Inventor： Jin Young Roh ,  Hui Nam ,  Se Hyuk Park ,  Hyo Jin Lee

IPC: G09G3/3233 ,  G09G3/3266

Abstract: A display device includes a display panel including a plurality of pixels each coupled to a write scan line, a compensation scan line, an initialization scan line, a bypass scan line, and a data line; and a scan driver configured to supply i (where i is a natural number) write scan pulses, compensation scan pulses, initialization scan pulses, and bypass scan pulses to the write scan line, the compensation scan line, the initialization scan line, and the bypass scan line, respectively, during a first period corresponding to one frame period, and to supply j (where j is a natural number other than i) write scan pulses to the write scan line during each of frame periods of a second period including a plurality of consecutive frame periods.

公开(公告)号：US11462170B2

公开(公告)日：2022-10-04

申请号：US17008366

申请日：2020-08-31

Applicant: Samsung Display Co., Ltd.

Inventor： Jae Keun Lim ,  Jin Young Roh ,  Sehyuk Park ,  Hyo Jin Lee

IPC: G09G3/3266 ,  G11C19/18 ,  G09G3/3258 ,  G09G3/3275 ,  G09G3/36 ,  G09G3/3233 ,  G11C19/28

Abstract: A scan driver includes: a plurality of first stages configured to sequentially output a plurality of intermediate scan signals based on a scan start signal; a plurality of masking transistors respectively connected to a plurality of output terminals of the plurality of first stages, and configured to selectively transfer the plurality of intermediate scan signals in response to a masking signal, respectively; and a plurality of second stages including a plurality of input terminals respectively connected to the plurality of masking transistors, and configured to selectively output a plurality of scan signals based on the plurality of intermediate scan signals selectively transferred by the plurality of masking transistors.

公开(公告)号：US11423834B2

公开(公告)日：2022-08-23

申请号：US17142131

申请日：2021-01-05

Applicant: Samsung Display Co., Ltd.

Inventor： Se Hyuk Park ,  Hong Soo Kim ,  Jin Young Roh ,  Hyo Jin Lee ,  Jae Keun Lim

IPC: G09G3/3291 ,  G09G3/3266 ,  G09G3/20 ,  G09G3/3233

Abstract: A display device includes: a pixel configured to display an image based on image data and a reference voltage; a controller configured to generate reference voltage data corresponding to the reference voltage for restraining leakage current in the pixel based on a frame frequency; and a power supply configured to generate the reference voltage based on the reference voltage data and supply the reference voltage to the pixel.