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公开(公告)号：US11715440B2
公开(公告)日：2023-08-01
申请号：US17541616
申请日：2021-12-03
Applicant: Samsung Display Co., Ltd.
Inventor： Gwangsoo Ahn , Jong Jae Lee , Taegon Im
CPC classification number: G09G5/008 , G09G3/36 , G09G2330/02
Abstract: A display device may include a display panel including a gate line, a data line, and a pixel electrically connected to the gate line and the data line, where display panel displays an image based on input image data, a gate driver which outputs a gate signal to the gate line, a data driver which outputs a data voltage to the data line, and a power supply voltage generator which provides a driving voltage to the display panel, the gate driver and the data driver. The power supply voltage generator generates a gate clock signal based on an on-clock signal and an off-clock signal and changes a count value of the on-clock signal or the off-clock signal when the gate clock signal is an abnormal signal.
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公开(公告)号：US11417262B2
公开(公告)日：2022-08-16
申请号：US16997642
申请日：2020-08-19
Applicant: Samsung Display Co., Ltd.
Inventor： Keunoh Kang , Yanguk Nam , Gwangsoo Ahn
Abstract: A display device includes a display panel, a gate driving circuit including a plurality of stages, and a power supply circuit outputting a clock signal, a clock-bar signal, a first discharge voltage, and a second discharge voltage. Each of stages includes a charge part that charges a clock signal having a first high voltage to a charge node, an output part that charges the first high voltage to an output node in response to a first node voltage of the charge node and outputs a second node voltage of the output node to a gate signal, a first discharge part that discharges the second node voltage to a first discharge voltage in response to the clock-bar signal having a second high voltage, and a second discharge part that discharges the first node voltage to a second discharge voltage in response to the clock-bar signal having the second high voltage.
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公开(公告)号：US11288997B1
公开(公告)日：2022-03-29
申请号：US17354695
申请日：2021-06-22
Applicant: Samsung Display Co., Ltd.
Inventor： Taegon Im , Gwangsoo Ahn , Jong Jae Lee , Byungkil Jeon
IPC: G09G3/20
Abstract: A display device includes a display panel including a plurality of data lines, and a plurality of pixels coupled to the plurality of data lines, a data driver including a plurality of channels providing data voltages to the plurality of pixels through the plurality of data lines, and a controller configured to control the data driver. The plurality of channels is grouped into first through N-th channel groups, where N is an integer greater than 1. The first through N-th channel groups sequentially initiate first dummy data voltage output operations in a first order from the first channel group to the N-th channel group in a first blank period before an active period, and sequentially finish second dummy data voltage output operations in a second order from the N-th channel group to the first channel group in a second blank period after the active period.
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公开(公告)号：US11450289B2
公开(公告)日：2022-09-20
申请号：US17387235
申请日：2021-07-28
Applicant: Samsung Display Co., Ltd.
Inventor： Gwangsoo Ahn , Jong Jae Lee , Sungsoo Choi
IPC: G09G3/36
Abstract: A display device includes a display panel including a gate line, a data line, a gate driver outputting a gate signal to the gate line, a data driver outputting a data voltage to the data line and a power voltage generator. The power voltage generator generates a gate-on voltage, a gate-off voltage, and a gate clock signal toggled between the gate-on voltage and the gate-off voltage, detects a current level of a gate clock current, cuts off power of the display device when a count of the gate clock current higher than or equal to a first current level is greater than or equal to a reference count, and cuts off the power of the display device when the gate clock current is higher than or equal to a second current level higher than the first current level in an initial frame after the display device is turned on.
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公开(公告)号：US10950197B2
公开(公告)日：2021-03-16
申请号：US16569562
申请日：2019-09-12
Applicant: Samsung Display Co., Ltd.
Inventor： Kihyun Pyun , Keunoh Kang , Moonshik Kang , Gwangsoo Ahn , Dae-sik Lee
Abstract: A data driver of a display device includes an equalizer and an equalizer controller. The equalizer controller calculates a lock time during a training enable signal is in an active state while sequentially changing a set signal applied to the equalizer to one option code selected from among a plurality of option codes and provides an option code corresponding to a set lock time among the option codes to the equalizer as the set signal.
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Patent Agency Ranking
公开(公告)号：US10770024B2
公开(公告)日：2020-09-08
申请号：US16233206
申请日：2018-12-27
Applicant: SAMSUNG DISPLAY CO., LTD.
Inventor： Gwangsoo Ahn , Sanghyun Lee , Dongwon Park , Songyi Han
Abstract: A display device includes a driving controller sensing a pattern of first image signals from a source external to the driving controller and outputting a compensation selection signal corresponding to the sensed pattern. A voltage generator generates a driving power voltage in response to the compensation selection signal. The voltage generator includes a power converter generating the driving power voltage in response to a power control signal, a comparator comparing the driving power voltage with a reference voltage to output a feedback signal to a first node, and a compensation circuit including a plurality of compensation units. A selected compensation unit is connected to the first node, and a power control circuit outputs the power control signal in response to the feedback signal. The slew rate of the feedback signal may be controlled by a compensation circuit to remove a ripple component from the driving power voltage.
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公开(公告)号：US10672353B2
公开(公告)日：2020-06-02
申请号：US15691190
申请日：2017-08-30
Applicant: SAMSUNG DISPLAY CO., LTD.
Inventor： Hongkyu Kim , Poyun Park , Yujin Kim , Jimyoung Seo , Gwangsoo Ahn
IPC: G09G3/36
Abstract: A method of driving a display device includes receiving a reference clock signal and frequency determination data to determine a pixel driving clock frequency and generate a pixel driving clock signal, generating and outputting a gate driving clock signal according to the pixel driving clock frequency, and outputting a driving voltage according to the pixel driving clock frequency. The driving voltage increases as the pixel driving clock frequency increases.
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公开(公告)号：US11482152B2
公开(公告)日：2022-10-25
申请号：US16728756
申请日：2019-12-27
Applicant: Samsung Display Co., Ltd.
Inventor： Gwangsoo Ahn , Keunoh Kang , Kihyun Pyun , Moonshik Kang
IPC: G09G3/20
Abstract: A display system includes a source device and a sink device. The source device generates red-color display data, green-color display data, and blue-color display data and transmits first packet data including the red-color display data and a red-color display reference gamma-set, second packet data including the green-color display data and a green-color display reference gamma-set, and third packet data including the blue-color display data and a blue-color display reference gamma-set. The sink device converts the red-color display data, the green-color display data, and the blue-color display data into red-color display data-voltages, green-color display data-voltages, and blue-color display data-voltages and displays an image using the red-color display data-voltages, the green-color display data-voltages, and the blue-color display data-voltages. The sink device generates red-color display gamma-voltages, green-color display gamma-voltages, and blue-color display gamma-voltages based on the red-color display reference gamma-set, the green-color display reference gamma-set, and the blue-color display reference gamma-set, respectively.
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公开(公告)号：US11172161B2
公开(公告)日：2021-11-09
申请号：US16847935
申请日：2020-04-14
Applicant: SAMSUNG DISPLAY CO., LTD.
Inventor： Gwangsoo Ahn , Po-yun Park , Hong-kyu Kim , Jimyoung Seo
Abstract: A display device includes a driving controller controlling a data driving circuit and providing a clock signal and a driving voltage in response to an image signal and a control signal received from an external source. The driving controller restores a data enable signal having a display period and a blank period in one frame on the basis of the control signal and sets a voltage level of the driving voltage applied to the gate driving circuit in accordance with a duration of the blank period. During a sequence of frames having a changing frame rate, the driving voltage for each respective frame may be set based on the duration of each respective blank period.
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公开(公告)号：US11170729B2
公开(公告)日：2021-11-09
申请号：US16857106
申请日：2020-04-23
Applicant: Samsung Display Co., Ltd.
Inventor： Gwangsoo Ahn , Dae-Sik Lee , Jong Jae Lee
IPC: G09G3/36
Abstract: A power management circuit of a display device includes a voltage information storage comprising a first and second bank storing first and second voltage information corresponding to first and second voltage levels different from each other, a bank select pin receiving a bank select signal, a voltage information selecting circuit selectively outputting the first voltage information stored in the first bank or the second voltage information stored in the second bank in response to the bank select signal received through the bank select pin, and a DC-DC converter generating panel driving voltages having the first voltage levels based on the first voltage information when the first voltage information is output from the voltage information selecting circuit, and generating the panel driving voltages having the second voltage levels based on the second voltage information when the second voltage information is output from the voltage information selecting circuit.
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