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公开(公告)号：US20210256911A1
公开(公告)日：2021-08-19
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
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.
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公开(公告)号：US20210043140A1
公开(公告)日：2021-02-11
申请号：US16921329
申请日：2020-07-06
Applicant: Samsung Display Co., Ltd.
Inventor： Jinyoung ROH , Sangan KWON , Sehyuk PARK , Hyojin LEE
IPC: G09G3/3233 , G09G3/3283 , G09G3/3266 , G09G3/20
Abstract: A display device includes a display panel and a panel driver configured to drive the display panel. The panel driver receives input image data corresponding to first, second, and third colors at an input frame frequency, and detects whether the input image data represent a still or dynamic image. If the input image data represent the dynamic image, the panel driver drives the display panel at a first output frame frequency substantially the same as the input frame frequency. If the input image data represent the still image, the panel driver calculates a plurality of flicker indexes of the still image for at least two of the first, second, third colors, one or more combinations of the first, second, and third colors, and drives the display panel at a second output frame frequency that is determined based on the plurality of flicker indexes.
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公开(公告)号：US20210027707A1
公开(公告)日：2021-01-28
申请号：US16888284
申请日：2020-05-29
Applicant: Samsung Display Co., Ltd.
Inventor： Sehyuk PARK , Sangan KWON , HongSoo KIM , Jinyoung ROH , Hyojin LEE
IPC: G09G3/3233 , G09G3/3266
Abstract: A display device including: a controller including: a zone splitting block configured to divide input image data into a plurality of partial image data respectively corresponding to a plurality of partial panel zones of the display panel; a plurality of panel zone frequency deciding blocks configured to determine a plurality of driving frequencies for the plurality of partial panel zones by analyzing the plurality of partial image data, respectively; a non-driving period setting block configured to classify a plurality of frame periods into a driving frame period and a non-driving frame period based on a maximum driving frequency of the plurality of driving frequencies; and a scan driver control block configured to provide the scan driver input signal to the scan driver in the driving frame period, and to not provide the scan driver input signal to the scan driver in the non-driving frame period.
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公开(公告)号：US20210005130A1
公开(公告)日：2021-01-07
申请号：US16828726
申请日：2020-03-24
Applicant: Samsung Display Co., Ltd.
Inventor： Jinyoung ROH , Sangan KWON , Sehyuk PARK , Hyo Jin LEE , HongSoo KIM , Sukhun LEE
Abstract: A display driver includes a still image detector configured to receive a compressed image bitstream at an input frame frequency from a host processor, and to detect a still image by comparing the compressed image bitstream of a current frame and the compressed image bitstream of a previous frame, a driving frequency changer configured to output the compressed image bitstream at a first output frame frequency equal to the input frame frequency when the still image is not detected, and to output the compressed image bitstream at a second output frame frequency lower than the input frame frequency when the still image is detected, and a decoder configured to generate original image data at the first output frame frequency and the second output frame frequency.
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公开(公告)号：US20200178393A1
公开(公告)日：2020-06-04
申请号：US16786113
申请日：2020-02-10
Applicant: Samsung Display Co., Ltd.
Inventor： Kyung-hwa LIM , Sangan KWON , Kyunho KIM , Yong-jin SHIN , Shimho YI , Heebum PARK
Abstract: A display device includes a display panel, a first circuit board, a control unit disposed on the first circuit board, a second circuit board, and a coupling film which electrically couples the control unit and the second circuit board to each other. The coupling film includes a first coupling part including a first region attached to the first circuit board, and a second region overlapping the display panel when viewed in a thickness direction of the display panel, a second coupling part including a third region attached to the second circuit board, and a fourth region overlapping the display panel when viewed in the thickness direction of the display panel, and a third coupling part coupled to each of the second region and the fourth region to electrically couple the first coupling part and the second coupling part to each other.
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Patent Agency Ranking
公开(公告)号：US20200027418A1
公开(公告)日：2020-01-23
申请号：US16401518
申请日：2019-05-02
Applicant: Samsung Display Co., Ltd.
Inventor： Kyunho KIM , Sangan KWON , Sungjin KIM , Subin PARK , Neung-Beom LEE
IPC: G09G3/36 , G09G3/3275 , G09G3/3225
Abstract: A display device includes a display panel including a plurality of pixels, a voltage generator which generates a gate on voltage having a first voltage level that satisfies a target charging ratio of a pixel of the plurality of pixels, a voltage controller which receives an image signal and generates a voltage control signal when the image signal includes a predetermined reference pattern, a gate driver which generates a gate signal provided to the plurality of pixels based on the gate on voltage, a data driver which generates a data signal provided to the of the plurality of pixels based on the image signal, and a timing controller which generates control signals that control the gate driver and the data driver. The voltage generator changes the gate on voltage to have a second voltage level lower than the first voltage level based on the voltage control signal.
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公开(公告)号：US20250046255A1
公开(公告)日：2025-02-06
申请号：US18607732
申请日：2024-03-18
Applicant: Samsung Display Co., Ltd.
Inventor： Sangan KWON , Soon-Dong KIM , Jihye KIM , Taehoon KIM , Changnoh YOON
IPC: G09G3/3266
Abstract: A display device includes a display panel including pixels connected to scan lines, a scan driving circuit including scan stages corresponding to the scan lines, respectively, where each of the scan stages receives a masking signal and a carry signal and outputs a scan signal, and a driving controller which divides the display panel into the first display area and the second display area, controls the scan driving circuit such that the first display area and the second display area operate with different frequencies, and outputs start signals provided at different timings. A first scan stage disposed in the first display area from among the scan stages receives a first start signal of the start signals as the carry signal, and a first scan stage disposed in the second display area from among the scan stages receives a second start signal of the start signals as the carry signal.
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公开(公告)号：US20230113451A1
公开(公告)日：2023-04-13
申请号：US18082038
申请日：2022-12-15
Applicant: Samsung Display Co., Ltd.
Inventor： Kyung-hwa LIM , Sangan KWON , Kyunho KIM , Yong-jin SHIN , Shimho YI , Heebum PARK
Abstract: A display device includes a display panel, a first circuit board, a control unit disposed on the first circuit board, a second circuit board, and a coupling film which electrically couples the control unit and the second circuit board to each other. The coupling film includes a first coupling part including a first region attached to the first circuit board, and a second region overlapping the display panel when viewed in a thickness direction of the display panel, a second coupling part including a third region attached to the second circuit board, and a fourth region overlapping the display panel when viewed in the thickness direction of the display panel, and a third coupling part coupled to each of the second region and the fourth region to electrically couple the first coupling part and the second coupling part to each other.
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公开(公告)号：US20220157253A1
公开(公告)日：2022-05-19
申请号：US17587325
申请日：2022-01-28
Applicant: Samsung Display Co., Ltd.
Inventor： HongSoo KIM , Sangan KWON , Jinyoung ROH , Sehyuk PARK , Sukhun LEE , Hyojin LEE
IPC: G09G3/3266 , G09G3/3275
Abstract: A display apparatus includes a display panel, a gate driver, a data driver and a driving controller. The display panel displays an image based on input image data. The gate driver outputs a gate signal to a gate line of the display panel. The data driver outputs a data voltage to a data line of the display panel. The driving controller controls operations of the gate driver and the data driver and drive a still image display area and a video image display area of a display area of the display panel in different driving frequencies. The driving controller includes a still image determiner which divides the input image data into a plurality of still image determining blocks, respectively determines whether the still image determining blocks represent a still image or a video image and determines a boundary between the still image display area and the video image display area.
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公开(公告)号：US20210366340A1
公开(公告)日：2021-11-25
申请号：US17397000
申请日：2021-08-09
Applicant: Samsung Display Co., Ltd.
Inventor： Jinyoung ROH , HongSoo KIM , Sangan KWON , Sehyuk PARK , Hyo Jin LEE
IPC: G09G3/20
Abstract: A display apparatus includes a display panel, a gate driver, a data driver and a driving controller. The display panel including a gate line and a data line displays an image based on input image data. The gate driver outputs a gate signal to the gate line. The data driver outputs a data voltage to the data line. The driving controller includes an area divider dividing the input image data into first and second area data, a first variable frequency driver determining a first driving frequency of the first area data based on a flicker value according to a grayscale value and generating a first data signal of the first driving frequency and a second variable frequency driver determining a second driving frequency of the second area data based on a flicker value according to a grayscale value and generating a second data signal of the second driving frequency.
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