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1. 发明授权

US11562689B2 Display device 有权
公开(公告)号：US11562689B2
公开(公告)日：2023-01-24
申请号：US17440170
申请日：2019-03-25
申请人： SHARP KABUSHIKI KAISHA
发明人： Tetsuya Ueno
IPC分类号： G09G3/3225 , G09G3/3275 , H01L27/32
摘要： A display device includes five light-emitting layers including four light-emitting layers arranged in two rows and two columns, and one light-emitting layer diagonally adjacent to each of the four light-emitting, layers, wherein three subpixel circuits corresponding to the one light-emitting layer and two light-emitting layers adjacent in a row direction among the five light-emitting layers are connected to an identical scanning signal line, and four subpixel circuits corresponding to the one light-emitting layer and three light-emitting layers diagonally adjacent to the one light-emitting layer among the five light-emitting layers are connected to four different data signal lines.

2. 发明授权

US10950183B2 Display device and driving method thereof 有权
公开(公告)号：US10950183B2
公开(公告)日：2021-03-16
申请号：US16493367
申请日：2017-03-24
申请人： Sharp Kabushiki Kaisha
发明人： Tetsuya Ueno , Asahi Yamato
IPC分类号： G09G3/3291 , G09G3/20
摘要： The present application discloses an organic EL display device adopting the SSD method, which enables sufficient charging with a data voltage and sufficient internal compensation in a pixel circuit even in a case that a display image has a higher resolution. There are provided m demultiplexers corresponding to m sets of data signal line groups, each of which is a set including k data signal lines (in this case, k=3). Each demultiplexer turns selection control signals to a low level (active) during a rest period before a scanning signal line is selected. In this case, a white voltage is supplied as a reset voltage from a data-side drive circuit to each data signal line via each demultiplexer. After that, each demultiplexer sequentially turns the selection control signals to an active state for a predetermined period such that the select control signal turns to the active state during the select period for the scanning signal line. With this, the data signals are sequentially supplied from the data-side drive circuit to the k data signal lines.

3. 发明授权

US11189235B2 Display device and method for driving same 有权
公开(公告)号：US11189235B2
公开(公告)日：2021-11-30
申请号：US16982000
申请日：2018-03-29
申请人： SHARP KABUSHIKI KAISHA
发明人： Tetsuya Ueno
IPC分类号： G09G3/3291 , G09G3/3266
摘要： The present disclosure discloses a current-driven display device that uses an internal compensation method and can display a good-quality image with no bright dots that are not included in intended display content. In a pixel circuit of an organic EL display device, a voltage of a gate terminal of a drive transistor is initialized before the voltage of a data signal line is written to a holding capacitor via the drive transistor in a diode-connected state. A drain terminal of a first initialization transistor is connected to an anode electrode of the organic EL element in another pixel circuit adjacent to the drain terminal in a scanning signal line extension direction. In a reset period, a path for applying an initialization voltage to the gate terminal is formed by a second initialization transistor of the other pixel circuit, an initialization connecting line, and the first initialization transistor of the pixel circuit.

4. 发明授权

US10573710B2 Display device 有权
公开(公告)号：US10573710B2
公开(公告)日：2020-02-25
申请号：US16462287
申请日：2017-05-29
申请人： Sharp Kabushiki Kaisha
发明人： Tetsuya Ueno , Ryoh Araki , Asahi Yamato
IPC分类号： H01L27/32 , H05K1/14 , H05K3/32 , H05K1/18
摘要： In the display device, the plurality of display bodies are jointed together and fixed to the elongated flexible circuit board.

5. 发明授权

US11386840B2 Display device and method for driving same 有权
公开(公告)号：US11386840B2
公开(公告)日：2022-07-12
申请号：US17277265
申请日：2018-09-20
申请人： SHARP KABUSHIKI KAISHA
发明人： Tetsuya Ueno
IPC分类号： G09G3/3233 , G09G3/3266 , G09G3/3283
摘要： The present application discloses a current-driven display device capable of preventing a decrease in display quality due to luminance gradient caused by a voltage drop in a power supply line while preventing an increase in circuit and processing necessary for driving a pixel circuit. In an organic EL display device, a high-level power supply line ELVDD includes a trunk wire ELV0 and N branch wires ELV1 to ELVN diverging from the trunk wire ELV0 and arranged along the plurality of scanning signal lines G1 to GN, respectively. A display control circuit determines estimated values of currents supplied from the power supply line to the respective pixel cicuits based on input image data, calculates a voltage drop ΔVn=V0−Vn at a connection point between the trunk wire and the branch wire on each row during a data write period for the pixel circuits on the each row based on a current in the trunk wire calculated from the estimated values, and generates a driving image data signal Sdda to be provided to a data-side drive circuit by correcting the input image data so as to compensate for the voltage drop ΔVn.

6. 发明授权

US11308881B2 Display device and method for driving same 有权
公开(公告)号：US11308881B2
公开(公告)日：2022-04-19
申请号：US17277267
申请日：2018-09-20
申请人： SHARP KABUSHIKI KAISHA
发明人： Tetsuya Ueno
IPC分类号： G09G3/3233 , G09G3/20 , G09G3/3266 , G09G3/3291
摘要： The present application discloses a current-driven display device capable of preventing a decrease in display quality due to luminance gradient or the like caused by a voltage drop in a power supply line while preventing an increase in circuit and processing necessary for driving a pixel circuit. In an organic EL display device, at a connection point of a high-level power supply line ELVDD with a pixel circuit 15 (Pix(n,k)) (n=1 to N; k=1 to M) on each branch wire ELVk, a display control circuit calculates a voltage drop ΔVn=V0−Vn caused by a current flowing in the branch wire ELVk in a data write period for the pixel circuit Pix(n,k), corrects corresponding pixel data (pixel data for Pix(n,k)) dn in input image data based on the voltage drop ΔVn, and generates a driving image data signal Sdda to be given to a data-side drive circuit based on the corrected pixel data dcn.

7. 发明授权

US11227553B2 Display device 有权
公开(公告)号：US11227553B2
公开(公告)日：2022-01-18
申请号：US17043655
申请日：2018-04-10
申请人： SHARP KABUSHIKI KAISHA
发明人： Tetsuya Ueno
IPC分类号： G09G3/30 , G09G3/3266 , G09G3/3275 , H01L27/32
摘要： A first region and a second region do not include sub-pixel circuits. The second region is surrounded by a display area. The first region is surrounded by the second region. When viewed orthogonally to the display area, a plurality of signal lines are provided across the second region. The signal lines include at least either two or more of scanning signal lines, or two or more of data signal lines. The signal lines across the second region run out of an edge of the first region.

8. 发明授权

US11158257B2 Display device and driving method for same 有权
公开(公告)号：US11158257B2
公开(公告)日：2021-10-26
申请号：US16977800
申请日：2018-03-19
申请人： SHARP KABUSHIKI KAISHA
发明人： Tetsuya Ueno
IPC分类号： G09G3/3233 , G09G3/3266 , G09G3/3291 , H01L27/32
摘要： An object of the disclosure is to achieve a current-driven display device able to compensate for a variation in threshold voltage of a drive transistor without causing a variation in luminance.
A pixel circuit includes a light-emitting element, a drive transistor, a power supply control transistor, a light emission control transistor, a first writing control transistor, a threshold voltage compensation transistor, a second writing control transistor, an initialization transistor, and a data-holding capacitor. During a data writing period, a scanning signal is active, an initialization voltage is supplied to a first electrode of the data-holding capacitor via the drive transistor, and a data voltage is supplied to a second electrode of the data-holding capacitor.

9. 发明授权

US11114031B2 Display device and method for driving same 有权
公开(公告)号：US11114031B2
公开(公告)日：2021-09-07
申请号：US16981660
申请日：2018-03-28
申请人： SHARP KABUSHIKI KAISHA
发明人： Tetsuya Ueno
IPC分类号： G09G3/3233 , G09G3/3266 , G09G3/3275
摘要： The present disclosure discloses a current-driven display device that uses an internal compensation method and can display a good-quality image with no bright dots that are not included in intended display content. In a pixel circuit of an organic EL display device, a voltage of a gate terminal of a drive transistor is initialized before the voltage of a data signal line is written to a holding capacitor via the diode-connected drive transistors. At this time, an initialization voltage is applied to the gate terminal via a display element initialization transistor, a second light emission control transistor, and a threshold compensation transistor. By initializing the gate terminal with a configuration not including an initialization transistor provided between the gate terminal and an initialization voltage supply line as in the related art, voltage drop at the gate terminal due to leakage current of the transistor in an off state is suppressed.

10. 发明授权

US11094254B2 Display device and method for driving same 有权
公开(公告)号：US11094254B2
公开(公告)日：2021-08-17
申请号：US16982450
申请日：2018-03-28
申请人： SHARP KABUSHIKI KAISHA
发明人： Tetsuya Ueno
IPC分类号： G09G3/3233 , G09G3/3266 , G09G3/3275
摘要： The present invention discloses a current-driven display device employing an internal compensation scheme and capable of displaying a favorable image with no occurrence of a bright point not included in the original display content. A voltage Vg at a gate terminal of a drive transistor M1 is initialized in a pixel circuit 15 of an organic EL display device before a voltage of a data signal line Dj is written to a holding capacitor C1 via the drive transistor M1 in a diode-connected state. At this time, an initialization voltage Vini is supplied to the gate terminal via a first initialization transistor M4 and a threshold compensation transistor M3. In this manner, a path for initializing the gate terminal of the drive transistor M1 is formed by the first initialization transistor M4 and the threshold compensation transistor M3 connected in series to each other, thereby preventing a voltage reduction at the gate terminal due to leakage current in an off-state transistor.

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