公开(公告)号：US11349392B2

公开(公告)日：2022-05-31

申请号：US16871157

申请日：2020-05-11

Applicant: Samsung Display Co., Ltd.

Inventor： Kyun Ho Kim ,  Jung-taek Kim ,  Joon Suk Baik ,  Sang Su Han ,  Jae Woo Ryu ,  Myung Ho Lee

IPC: H02M3/156 ,  H03F3/14

Abstract: A power voltage generator includes a booster, a voltage sensor, a constant voltage controller and a constant current controller. The booster is configured to boost an input voltage to an output voltage based on an on-off operation of a switch. The voltage sensor is configured to generate a sensing voltage by sensing the output voltage. The constant voltage controller is configured to generate a first switching signal to control the switch by comparing the sensing voltage with a reference voltage. The constant current controller is configured to generate a gain based on a ratio of an electrode signal of the switch and a target signal by comparing the electrode signal of the switch with the target signal.

公开(公告)号：US10565953B2

公开(公告)日：2020-02-18

申请号：US15796133

申请日：2017-10-27

Applicant: Samsung Display Co., Ltd.

Inventor： Jung-taek Kim ,  Sangwoo Choi

IPC: G09G3/36

Abstract: A display device includes a display panel including a gate driving circuit which drives gate lines, a data driving circuit which drives data lines based on an image data signal and a driving reference voltage, and a driving controller which controls the gate driving circuit in response to an image signal and a control signal and provides the image data signal and the driving reference voltage to the data driving circuit. The driving controller generates a data enable signal having a display section and a blank section in one frame based on the control signal, and when a difference between a time length of the blank section of a current frame and a time length of the blank section of a previous frame is greater than a reference value, changes the driving reference voltage to a voltage level corresponding to a current frame frequency.

公开(公告)号：US20170124985A1

公开(公告)日：2017-05-04

申请号：US15242454

申请日：2016-08-19

Applicant: Samsung Display Co., Ltd.

Inventor： Jung-taek Kim ,  Kyoungwon Lee ,  Joon-chul Goh ,  Youngwoo Choi

IPC: G09G5/10

CPC classification number: G09G3/342 ,  G09G2310/027 ,  G09G2310/08 ,  G09G2320/0276 ,  G09G2320/0646 ,  G09G2320/0673 ,  G09G2330/021 ,  G09G2360/16

Abstract: A display device includes: a display panel including first group pixels connected to a first gate line to receive first data voltages, and second group pixels connected to the first gate line to receive second data voltages; a backlight source to provide light to the display panel; a signal controller to divide horizontal image signals into first group image signals and second group image signals, to extract a first maximum grayscale image signal from the first group image signals, and to extract a second maximum grayscale image signal from the second group image signals; a power supply to generate first and second gamma driving voltages from a reference gamma driving voltage based on a grayscale level of the first maximum grayscale image signal and a grayscale level of the second maximum grayscale image signal.

公开(公告)号：US11632046B2

公开(公告)日：2023-04-18

申请号：US17827862

申请日：2022-05-30

Applicant: Samsung Display Co., Ltd.

Inventor： Kyun Ho Kim ,  Jung-taek Kim ,  Joon Suk Baik ,  Sang Su Han ,  Jae Woo Ryu ,  Myung Ho Lee

IPC: H02M3/156 ,  H03F3/14

Abstract: A power voltage generator includes a booster, a voltage sensor, a constant voltage controller and a constant current controller. The booster is configured to boost an input voltage to an output voltage based on an on-off operation of a switch. The voltage sensor is configured to generate a sensing voltage by sensing the output voltage. The constant voltage controller is configured to generate a first switching signal to control the switch by comparing the sensing voltage with a reference voltage. The constant current controller is configured to generate a gain based on a ratio of an electrode signal of the switch and a target signal by comparing the electrode signal of the switch with the target signal.

公开(公告)号：US10319310B2

公开(公告)日：2019-06-11

申请号：US15242454

申请日：2016-08-19

Applicant: Samsung Display Co., Ltd.

Inventor： Jung-taek Kim ,  Kyoungwon Lee ,  Joon-chul Goh ,  Youngwoo Choi

IPC: G09G5/10 ,  G09G3/34

Abstract: A display device includes: a display panel including first group pixels connected to a first gate line to receive first data voltages, and second group pixels connected to the first gate line to receive second data voltages; a backlight source to provide light to the display panel; a signal controller to divide horizontal image signals into first group image signals and second group image signals, to extract a first maximum grayscale image signal from the first group image signals, and to extract a second maximum grayscale image signal from the second group image signals; a power supply to generate first and second gamma driving voltages from a reference gamma driving voltage based on a grayscale level of the first maximum grayscale image signal and a grayscale level of the second maximum grayscale image signal.