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公开(公告)号：US20180315392A1
公开(公告)日：2018-11-01
申请号：US15565907
申请日：2017-05-04
Applicant: BOE TECHNOLOGY GROUP CO., LTD.
CPC classification number: G09G3/38 , G02F1/163 , G02F2001/1635 , G09G2300/0439 , G09G2300/0809 , G09G2300/0866 , G09G2310/0262 , G09G2310/0275
Abstract: A pixel circuit is provided which includes a data writing module, a drive module, a control module and an electrochromic device. The data writing module provides a data signal to the control terminal of the drive module under the control of a first control signal. The drive module drives the electrochromic device for colour development or colour fading according to a power supply voltage signal under the control of the data signal. The control module controls the conduction between the drive module and the electrochromic device on the basis of a second control signal, and the control module controls the conduction so that the conduction is realized later than the change in the power supply voltage signal. The pixel circuit effectively removes interference of the power supply voltage signal, avoids display fluctuations caused by the change in the power supply voltage signal, and further improves the display effect.
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公开(公告)号：US20180293016A1
公开(公告)日：2018-10-11
申请号：US15567733
申请日：2017-05-17
Applicant: BOE TECHNOLOGY GROUP CO., LTD.
Inventor： Song MENG , Fei YANG , Danna SONG
IPC: G06F3/06 , G09G3/3225
Abstract: A method and apparatus for updating data in a memory for electrical compensation, the method comprises: when a master chip receives a power-off signal, writing a serial number of a block being updated or a predetermined value into a nonvolatile memory. In the apparatus, only a nonvolatile memory is required to be provided external to a master chip to store the serial number of the block (the sequence of the block) being updated currently during power-off. Upon a next power-on, it is determined that which rows have their data lost during the previous power-off according to the serial number of the block, and then data of adjacent rows is used to replace the data of the rows which have their data lost during the previous power-off; therefore, the operation is simple and the efficiency is high, so that the time for updating the data is short, without affecting the memory's lifespan
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43.发明申请公开(公告)号：US20180197472A1
公开(公告)日：2018-07-12
申请号：US15535585
申请日：2016-12-09
Applicant: BOE TECHNOLOGY GROUP CO., LTD.
IPC: G09G3/3233
Abstract: A driving method for preventing image sticking of a display panel upon shutdown, and a display device. The method includes: receiving a shutdown signal; and adjusting driving signals of a sub-pixel circuit of the display panel, so as to reduce the voltage difference between a gate electrode and a source electrode of a driving transistor of the sub-pixel circuit, and hence allowing the display panel to enter an image sticking prevention mode. The method can prevent image sticking of the display panel at the time of shutdown and hence improve the display quality.
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44.发明申请公开(公告)号：US20210335253A1
公开(公告)日：2021-10-28
申请号：US16481796
申请日：2019-01-21
Applicant: BOE TECHNOLOGY GROUP CO., LTD.
IPC: G09G3/3258 , H01L27/32 , G09G3/00
Abstract: The present disclosure relates to a method for driving an organic light emitting display device, a driving controller, and a display device. When startup detection is required to be performed on the display compensation parameter of the organic light emitting display device, the startup detection is performed on the display compensation parameter of the organic light emitting display device to obtain a new compensation parameter value, and startup compensation display is performed based on the new compensation parameter value. When shutdown detection is required to be performed on the display compensation parameter of the organic light emitting display device, the shutdown detection is performed on the organic light emitting display device to obtain an updated compensation parameter value, and the updated compensation parameter value is stored.
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Patent Agency Ranking
公开(公告)号：US20210272519A1
公开(公告)日：2021-09-02
申请号：US17044249
申请日：2020-04-14
IPC: G09G3/3258
Abstract: The present disclosure discloses a pixel circuit compensation method and device, and a display device. The method includes: when the display panel is in a preset display state, sensing a preset mobility compensation value corresponding to a driving transistor in the pixel circuit; according to the preset mobility compensation value, adjusting an initial mobility compensation value corresponding to the driving transistor to a target mobility compensation value, wherein a difference between the target mobility compensation value and the preset mobility compensation value is less than a threshold; based on the target mobility compensation value, when the display panel is in a non-display state, compensating a mobility of the driving transistor in a preset compensation manner.
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公开(公告)号：US20210225287A1
公开(公告)日：2021-07-22
申请号：US16765846
申请日：2019-09-29
Inventor： Song MENG , Fei YANG , Chun CAO , Xiaolong WEI
IPC: G09G3/3258 , G09G3/3275
Abstract: A compensation method for a display panel and a display device are provided. The display panel includes a plurality of sub-pixels, and at least one of the plurality of sub-pixels includes a sensing capacitor. The method includes: obtaining a first voltage value and a second voltage value of the sensing capacitor, obtaining a temperature change amount of a sub-pixel corresponding to the sensing capacitor according to the first voltage value and the second voltage value of the sensing capacitor, determining a value of a compensation parameter of the sub-pixel according to the temperature change amount of the sub-pixel and a preset correspondence between the temperature change amount of the sub-pixel and the compensation parameter; and performing a compensation on a driving voltage of the sub-pixel according to the value of the compensation parameter as determined.
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47.发明申请公开(公告)号：US20190259327A1
公开(公告)日：2019-08-22
申请号：US16080466
申请日：2018-01-16
Applicant: BOE TECHNOLOGY GROUP CO., LTD.
IPC: G09G3/3233
Abstract: A compensation circuit and a manufacturing method thereof, a pixel circuit, a compensation device and a display device are disclosed. The OLED compensation circuit includes at least two sense transistors, the at least two sense transistors are in one-to-one correspondence with at least two sub-pixels in a pixel, and a first electrode of each of the sense transistors is electrically connected to a driving transistor of corresponding one of the sub-pixels; a magnitude relationship between channel width-to-length ratios of driving transistors of any two sub-pixels of the at least two sub-pixels is identical with a magnitude relationship between channel width-to-length ratios of two sense transistors corresponding to the two sub-pixels.
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公开(公告)号：US20190108780A1
公开(公告)日：2019-04-11
申请号：US15774175
申请日：2017-10-13
Applicant: BOE TECHNOLOGY GROUP CO., LTD.
IPC: G09G3/20
Abstract: A Gamma-curve correction method for a display apparatus, and a display apparatus. The method includes: determining a standard Gamma curve according to the display apparatus; selecting a plurality of test gray scale values on the standard Gamma curve, and acquiring a plurality of target brightness values corresponding to the plurality of test gray scale values; adjusting an input gray scale value of the display apparatus to obtain a plurality of test-correction gray scale values, where the test-correction gray scale values are corresponding input gray scale values when display brightness of the display apparatus is equal to respective target brightness; generating an association relationship between input gray scale values and correction gray scale values, according to the plurality of test gray scale values and the plurality of test-correction gray scale values; and adjusting the input gray scale value to a corresponding correction gray scale value, according to the association relationship.
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49.发明申请公开(公告)号：US20170196080A1
公开(公告)日：2017-07-06
申请号：US15214368
申请日：2016-07-19
Applicant: BOE TECHNOLOGY GROUP CO., LTD.
Inventor： Song MENG , Danna SONG
CPC classification number: H05K1/0268 , H05K1/118 , H05K1/14 , H05K1/181 , H05K3/361 , H05K2201/10128
Abstract: The display device comprises a printed circuit board, a display panel and a chip on film for connecting the printed circuit board with the display panel. The chip on film comprises a plurality of output pads and a plurality of first test pads which are close to the plurality of output pads and arranged at intervals. The display panel comprises a plurality of input pads in one-to-one correspondence with the plurality of output pads of the chip on film, and a plurality of second test pads which are close to the plurality of input pads of the display panel and arranged at intervals. A gap between two adjacent first test pads of the chip on film overlaps a second test pad of the display panel such that the two adjacent first test pads of the chip on film are connected via the second test pad of the display panel.
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