公开(公告)号：US20210407436A1

公开(公告)日：2021-12-30

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

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.

公开(公告)号：US20210375201A1

公开(公告)日：2021-12-02

申请号：US17204213

申请日：2021-03-17

Applicant: Samsung Display Co., Ltd.

Inventor： Sehyuk PARK ,  Jae Keun LIM ,  Hong Soo KIM ,  Jin Young ROH ,  Hyo Jin LEE

IPC: G09G3/3225 ,  H01L27/32

Abstract: A pixel of an organic light emitting diode display device includes a capacitor, a first transistor, a second transistor, a third transistor, a fourth transistor, a fifth transistor, a sixth transistor, a seventh transistor, an eighth transistor, a ninth transistor and an organic light emitting diode. The third transistor includes first and second sub-transistors which are coupled to each other in series between a drain of the first transistor and a gate node, and a fourth transistor includes third and fourth sub-transistors which are coupled to each other in series between a line of an initialization voltage and the gate node. The eighth transistor applies a reference voltage to a first node between the first and second sub-transistors in response to an emission signal, and a ninth transistor applies the reference voltage to a second node between the third and fourth sub-transistors in response to the emission signal.

公开(公告)号：US20210056895A1

公开(公告)日：2021-02-25

申请号：US16943293

申请日：2020-07-30

Applicant: Samsung Display Co., Ltd.

Inventor： Hyo Jin LEE ,  Joon-Chul GOH ,  Sangan KWON ,  Hui NAM ,  Jin Young ROH ,  Sehyuk PARK

IPC: G09G3/325 ,  G09G3/3275

Abstract: A pixel circuit includes a main-circuit that controls an organic light-emitting element by controlling a driving current to flow into the organic light-emitting element and a sub-circuit including a first compensation transistor including a gate terminal which receives a first gate signal, a second compensation transistor including a gate terminal which receives a second gate signal, and an initialization transistor including a gate terminal which receives an initialization signal. Here, in a low-frequency driving mode, a driving frequency of the first gate signal is N hertz (Hz), a driving frequency of the initialization signal is N Hz, a driving frequency of the second gate signal is M Hz, the first compensation transistor and the initialization transistor are turned on during a first time duration in N non-light-emitting periods per second, and the second compensation transistor is turned on during a second time duration in M non-light-emitting periods per second.

公开(公告)号：US20200372853A1

公开(公告)日：2020-11-26

申请号：US16793880

申请日：2020-02-18

Applicant: Samsung Display Co., Ltd.

Inventor： Se Hyuk PARK ,  Hyo Jin LEE ,  Sang An KWON ,  Jin Young ROH

IPC: G09G3/32

Abstract: A display device includes a display unit. The display unit includes a first display area and a second display area. A first scan line, a first power line, and first pixels connected to the first scan line and the first power line are in the first display area. A second scan line, a second power line, and second pixels connected to the second scan line and the second power line are in the second display area. A scan driver is configured to sequentially provide a scan signal to the first scan line and the second scan line. A power supply is configured to provide a power source voltage that is varied independently to the first power line and the second power line.

公开(公告)号：US20220415258A1

公开(公告)日：2022-12-29

申请号：US17840543

申请日：2022-06-14

Applicant: Samsung Display Co., LTD.

Inventor： Se Hyuk PARK ,  Jin Young ROH ,  Woo Mi BAE ,  Hae Kwan SEO ,  Young Ha SOHN ,  Jin Wook YANG

IPC: G09G3/3241 ,  G09G3/20

Abstract: A display device includes: a data driver for supplying a data signal to each of a plurality of data lines; and a pixel unit including a plurality of sub-pixels. The pixel unit further includes one dummy data line disposed separate from a data line of a first column among the data lines. The data line of the first column is connected to sub-pixels disposed on odd-numbered pixel rows among sub-pixels disposed on a first pixel column, and is connected to sub-pixels disposed on even-numbered pixel rows among sub-pixels disposed on a third pixel column. The dummy data line is connected to sub-pixels disposed on the even-numbered pixel rows among the sub-pixels disposed on the first pixel column.

公开(公告)号：US20220319409A1

公开(公告)日：2022-10-06

申请号：US17517736

申请日：2021-11-03

Applicant: Samsung Display Co., Ltd.

Inventor： Se Hyuk PARK ,  Hong Soo KIM ,  Jin Young ROH ,  Hyo Jin LEE ,  Jae Keun LIM

IPC: G09G3/3225

Abstract: A display device comprises pixels, an emission control driver, a scan driver, and a timing controller for selecting whether the display device is to operate in a first display mode in which the display device is driven at a first frequency or a second display mode in which the display device is driven at a second frequency lower than the first frequency based on input image data. The first display mode comprises first frame periods, and the second display mode comprises second frame periods having at least two sub-frames having a period equal to the first frame period. A total time required to supply the scan signals to the scan lines in one first frame period of the first frame periods and a total time required to supply the scan signals to the scan lines in one second frame period of the second frame periods are substantially same.

公开(公告)号：US20220309998A1

公开(公告)日：2022-09-29

申请号：US17535340

申请日：2021-11-24

Applicant: Samsung Display Co., Ltd.

Inventor： Jae Keun LIM ,  Hong Soo KIM ,  Jin Young ROH ,  Se Hyuk PARK ,  Woo Mi BAE ,  Hyo Jin LEE

IPC: G09G3/32

Abstract: Provided is a display device comprising a pixel unit including first pixel rows connected to first scan lines and second pixel rows alternating with the first pixel rows and connected to second scan lines, a scan driver including first scan stages connected to the first scan lines and second scan stages connected to the second scan lines, and an emission driver including emission stages in which each of emission lines is connected to two or more pixel rows. Accordingly, the display device is capable of changing a display frequency and maintaining the same cycle in which luminance decreases when the display frequency is changed.

公开(公告)号：US20220293027A1

公开(公告)日：2022-09-15

申请号：US17521066

申请日：2021-11-08

Applicant: SAMSUNG DISPLAY CO., LTD.

Inventor： Se Hyuk PARK ,  Jin Young ROH ,  Hyo Jin LEE ,  Jae Keun LIM

IPC: G09G3/20

Abstract: A display system includes: a host processor which outputs first image data and outputs scan frequency information and a partial scan enable signal, based on an image driving frequency; a display module controlled by the host processor; and an interface. The display module includes: a display driving circuit which controls a selection of pixel rows to which the data signals are supplied based on the scan frequency information and the partial scan enable signal; and a display panel which displays an image on selected pixel rows based on the data signals. In a video mode of the interface, the host processor divides and outputs the first image data through the interface during transmission periods, based on the image driving frequency, and suspends an output of the first image data through the interface during suspend periods.

公开(公告)号：US20220262296A1

公开(公告)日：2022-08-18

申请号：US17535331

申请日：2021-11-24

Applicant: Samsung Display Co., Ltd.

Inventor： Jae Keun LIM ,  Hong Soo KIM ,  Jin Young ROH ,  Se Hyuk PARK ,  Hyo Jin LEE

IPC: G09G3/20

Abstract: Provided is a display device including a pixel unit in which each of pixel rows extends in a first direction, odd numbered pixel rows and even numbered pixel rows are alternately disposed in a second direction, and pixels included in the pixel rows are designated as dots having two or more units, a gray difference calculator that calculates difference between representative grays of dots adjacent in the second direction among dots of a p-th pair of the pixel rows, an edge detector that increases an edge dot number when a first condition in which the difference between the representative grays is larger than a first threshold value is satisfied, and a first pattern detector that increases an edge number when the edge dot number is larger than a second threshold value, and that generates a first pattern detection signal when the edge number is larger than a third threshold value.

公开(公告)号：US20220020311A1

公开(公告)日：2022-01-20

申请号：US17220190

申请日：2021-04-01

Applicant: SAMSUNG DISPLAY CO., LTD.

Inventor： Jae Keun LIM ,  Han Bit KIM ,  Hong Soo KIM ,  Jin Young ROH ,  Se Hyuk PARK ,  Hyo Jin LEE

IPC: G09G3/20

Abstract: A display device of the invention includes: a pixel portion including first pixel rows connected to first scan lines and second pixel rows connected to second scan lines; a scan driver including first and second stages connected to the first scan lines and the second scan lines; and a data driver connected to the first and second pixel rows through same data lines. The first stages are connected to first clock lines, the second stages are connected to second clock lines, a first start stage of the first stages and a second start stage of the second stages are connected to a same scan start line, each first stage excluding the first start stage is connected to a first scan line of a previous first stage, and each second stage excluding the second start stage is connected to a second scan line of a previous second stage.