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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
发明人： Jinyoung ROH , Sangan KWON , Sehyuk PARK , Hyojin LEE
IPC分类号： G09G3/3233 , G09G3/3283 , G09G3/3266 , G09G3/20
摘要： 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
发明人： Sehyuk PARK , Sangan KWON , HongSoo KIM , Jinyoung ROH , Hyojin LEE
IPC分类号： G09G3/3233 , G09G3/3266
摘要： 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
发明人： Jinyoung ROH , Sangan KWON , Sehyuk PARK , Hyo Jin LEE , HongSoo KIM , Sukhun LEE
摘要： 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：US20230005409A1
公开(公告)日：2023-01-05
申请号：US17940414
申请日：2022-09-08
发明人： Suk Hun LEE , Sangan KWON , Hong Soo KIM , Jin Young ROH , Sehyuk PARK , Hyo Jin LEE
IPC分类号： G09G3/20
摘要： A display apparatus includes a display panel displaying an image based on an input image data, a data driver outputting a data voltage to a data line, and a driving controller determining a driving frequency of the display panel based on the input image data. The driving controller includes a flicker value storage configured to store flicker values for grayscale values corresponding to the input image data, a voltage drop determiner configured to adjust a flicker value of the flicker values based on a voltage drop of the display panel, a still image determiner configured to determine whether the input image data is a still image or a video image, and a driving frequency determiner configured to determine the driving frequency of the display panel using the flicker value based on the input image data being the still image.
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公开(公告)号：US20220130325A1
公开(公告)日：2022-04-28
申请号：US17436869
申请日：2020-02-25
发明人： Hyojin LEE , Sehyuk PARK , Hui NAM
摘要： A pixel includes a switching transistor transmitting a data voltage to a first node, a storage capacitor electrically connected between a first power supply line and the first node and storing the data voltage, first and second driving transistors electrically connected to the first power supply line, the first node, and a second node, and first and second light emitting elements electrically connected between the second node and a second power supply line. An anode of the first light emitting element and a cathode of the second light emitting element are electrically connected to the second node, a cathode of the first light emitting element and an anode of the second light emitting element are electrically connected to the second power supply line, the first driving transistor is a P-type transistor, and the second driving transistor is an N-type transistor.
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公开(公告)号：US20220059034A1
公开(公告)日：2022-02-24
申请号：US17515742
申请日：2021-11-01
发明人： HYOJIN LEE , Sehyuk PARK , Jinyoung ROH , Geunjeong PARK , EUNHO LEE , Hui NAM , BONGHYUN YOU
IPC分类号： G09G3/3258 , G09G3/3266 , G09G3/3275
摘要： A display device including: a display panel including a pixel connected to a first scan line, second scan line, and data line, the pixel including: a first switch connected to the first scan line; a second switch connected to the second scan line; and a light emitting element; a low-frequency driving controller to output a power control signal having a first level in a first mode and a second power control signal having a second level in a second mode; a scan driver including first and second scan drivers to drive the first and second scan lines, wherein one of the first and second scan drivers operates in the second mode; and a data driver to operate in the second mode in response to the power control signal having the second level, wherein the data driver operates at a frequency lower than a reference frequency in the second mode.
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37.发明申请公开(公告)号：US20210375201A1
公开(公告)日：2021-12-02
申请号：US17204213
申请日：2021-03-17
发明人： Sehyuk PARK , Jae Keun LIM , Hong Soo KIM , Jin Young ROH , Hyo Jin LEE
IPC分类号： G09G3/3225 , H01L27/32
摘要： 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.
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公开(公告)号：US20210343245A1
公开(公告)日：2021-11-04
申请号：US17379929
申请日：2021-07-19
发明人： Hui NAM , Hyo Jin LEE , Jinyoung ROH , Sehyuk PARK
IPC分类号： G09G3/3258 , G09G3/3266 , G09G3/3291
摘要： A display apparatus includes a display panel, a gate driver, a data driver and an emission driver. The display panel includes a pixel. The gate driver outputs a data write gate signal having a corresponding active level and a data initialization gate signal having a corresponding active level to the pixel in a writing frame, outputs the data write gate signal not having the corresponding active level and the data initialization gate signal not having the corresponding active level to the pixel in a holding frame and outputs the data write gate signal having the corresponding active level and the data initialization gate signal not having the corresponding active level to the pixel in a writing compensation frame. The data driver outputs a data voltage to the pixel. The emission driver outputs an emission signal to the pixel.
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公开(公告)号：US20210327368A1
公开(公告)日：2021-10-21
申请号：US17273340
申请日：2019-06-28
发明人： Sehyuk PARK , Hyo-Jin LEE
IPC分类号： G09G3/3291 , H01L27/32
摘要： A display device includes a display panel including a pixel including switching elements of a first type and a second type different from the first type, a gate driver for generating a gate signal based on a gate clock signal and providing the gate signal to the display panel, a data driver for providing data voltage to the display panel, an emission controller for providing an emission controlling signal to the display panel, and a driving controller for generating control signals for controlling the gate and data drivers, and the emission controller. In a low-frequency driving mode, the display panel operates in a writing frame for writing data in the pixel and in a holding frame for holding the data written in the pixel, and the driving controller provides the gate driver with a gate clock signal having a direct current (DC) voltage during the holding frame.
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公开(公告)号：US20210312871A1
公开(公告)日：2021-10-07
申请号：US17347468
申请日：2021-06-14
发明人： Sehyuk PARK , Hyojin LEE , Hui NAM , Jinyoung ROH , Bong Hyun YOU , Eunho LEE
IPC分类号： G09G3/3275
摘要： A display device includes: a display panel including a plurality of pixels; and a driving controller configured to: generate a data signal corresponding to an input image data; generate a data voltage based on the data signal; and output the data voltage to the pixels, wherein the driving controller is configured to output the data signal in at least one driving frequency higher than a predetermined low frequency during an image transition period in a low frequency driving mode during which the data signal outputs in the low frequency.
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