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公开(公告)号：US20230298520A1
公开(公告)日：2023-09-21
申请号：US17920425
申请日：2020-05-25
发明人： Shigetsugu YAMANAKA
IPC分类号： G09G3/3233
CPC分类号： G09G3/3233 , G09G2300/0819 , G09G2300/0842 , G09G2300/0861 , G09G2310/0202 , G09G2310/08 , G09G2320/046 , G09G2360/14
摘要： In an organic EL display device including a proximity sensor, deterioration in display quality due to irradiation with IR light is suppressed. In a display period during which an image is displayed on a display unit, an emitting unit of the proximity sensor emits the IR light only in a period including a part of an IR light irradiation region turn-off period during which a plurality of light-emission control lines are driven such that no current is supplied to each of organic EL elements included in pixel circuits in a row corresponding to the IR light irradiation region, the period being before a time point at which the writing of a data signal into each of the pixel circuits in each of rows corresponding to the IR light irradiation region is started.
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公开(公告)号：US20170162226A1
公开(公告)日：2017-06-08
申请号：US15327584
申请日：2015-07-16
发明人： Shigetsugu YAMANAKA
CPC分类号： G11B20/18 , G09G3/3233 , G09G3/36 , G09G5/00 , G09G5/024 , G09G5/026 , G09G2320/0233 , G09G2320/029 , G09G2320/0295 , G09G2320/041 , G09G2320/043
摘要： An initial current ratio calculation unit obtains an initial current ratio for each pixel based on a current measurement result by a data line drive/current measurement circuit. A light emission current efficiency calculation unit obtains a light emission current efficiency for each pixel referring to an LUT, based on a measured operating temperature and the initial current ratio. A first correction unit corrects a video signal for each pixel in view of characteristics of each pixel, based on the current measurement result and the light emission current efficiency. A second correction unit obtains a correction term for each pixel in view of a difference in the light emission current efficiency compared to neighboring pixels, based on a two-dimensional distribution of the light emission current efficiency. The correction term obtained by the second correction unit is added to the video signal corrected to obtain a corrected video signal.
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公开(公告)号：US20180342208A1
公开(公告)日：2018-11-29
申请号：US16052669
申请日：2018-08-02
发明人： Daichi NISHIKAWA , Yasuyuki OGAWA , Kaoru YAMAMOTO , Noritaka KISHI , Shigetsugu YAMANAKA , Masanori OHARA , Noboru NOGUCHI
IPC分类号： G09G3/3258 , G09G3/3266 , G11C19/28 , G09G3/3233 , G09G3/3291
CPC分类号： G09G3/3258 , G09G3/3233 , G09G3/3266 , G09G3/3291 , G09G2300/0842 , G09G2310/0286 , G09G2310/065 , G09G2310/08 , G09G2320/0285 , G09G2320/0295 , G09G2320/045 , G09G2320/048 , G09G2330/023 , G09G2330/12 , G11C19/28
摘要： In a current measurement period set in a pause period, a display device of the present invention applies measurement voltages to data lines (S1 to Sm) and measures currents outputted to monitoring lines (M1 to Mm) from m pixel circuits (18), and then applies data voltages generated corresponding to video signals to the data lines (S1 to Sm).
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公开(公告)号：US20170316741A1
公开(公告)日：2017-11-02
申请号：US15639242
申请日：2017-06-30
IPC分类号： G09G3/3258 , G09G3/3225 , G09G3/3291 , G09G3/3275 , G09G3/3283
CPC分类号： G09G3/3258 , G09G3/3225 , G09G3/3275 , G09G3/3283 , G09G3/3291 , G09G2300/0819 , G09G2300/0852 , G09G2300/0861 , G09G2300/0866 , G09G2310/0259 , G09G2320/0242
摘要： In a pixel circuit, TFTs are connected and driven such that a threshold voltage Vth of a TFT, which is a drive transistor, can be held in a threshold holding capacitor having a capacitance value c1, voltages, including a data potential Vdata representing an image to be displayed, can be held in a data holding capacitor having a capacitance value c2, and charges in the data holding capacitor and the threshold holding capacitor are redistributed at the time of light emission. As a result, a potential obtained by multiplying the data potential Vdata by c1/(c1+c2) is provided to a gate potential of the TFT.
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公开(公告)号：US20150356899A1
公开(公告)日：2015-12-10
申请号：US14759440
申请日：2013-12-25
CPC分类号： G09G3/14 , G09G3/2011 , G09G3/3225 , G09G3/3233 , G09G3/3258 , G09G3/3283 , G09G2300/08 , G09G2300/0842 , G09G2320/0233 , G09G2320/0271 , G09G2320/045 , G09G2320/046 , G09G2320/0633 , G09G2340/02 , H01L51/50
摘要： An embodiment of the present invention is directed to reducing a memory capacity required for saving compensating data (data used for compensating variations and the like in characteristic of a drive transistor) compared to conventional examples, in a display device. An organic EL display device using an oxide TFT for a drive transistor is provided with: a low pass filter for extracting low frequency component data from pixel current data as data of a drive current of the drive transistor; a first computing portion for obtaining high frequency component data by obtaining a difference between the pixel current data and the low frequency component data; a down-sampling portion for extracting data from the low frequency component data at predetermined sampling intervals; and a high frequency signal compression processing portion for extracting only high amplitude data out of the high frequency component data.
摘要翻译： 在显示装置中，本发明的一个实施例涉及减少用于保存补偿数据所需的存储器容量（用于补偿驱动晶体管的特性中的变化等的数据）。 使用用于驱动晶体管的氧化物TFT的有机EL显示装置设置有：低通滤波器，用于从像素电流数据中提取低频分量数据作为驱动晶体管的驱动电流的数据; 第一计算部分，用于通过获得像素电流数据和低频分量数据之间的差来获得高频分量数据; 下采样部分，用于以预定的采样间隔从低频分量数据中提取数据; 以及用于仅从高频分量数据中提取高振幅数据的高频信号压缩处理部分。
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公开(公告)号：US20180082642A1
公开(公告)日：2018-03-22
申请号：US15562920
申请日：2016-03-25
IPC分类号： G09G3/3291 , G09G3/3258 , G09G3/3233
摘要： A display device that is configured to include two independent shift registers and is capable of performing a monitoring process without causing the degradation of display quality or the occurrence of abnormal operation is implemented. In a display device including: a writing control shift register composed of a plurality of first unit circuits (30) each including a first boost circuit (320) and a first output node reset circuit (330); and a monitoring control shift register composed of a plurality of second unit circuits (40) each including a second boost circuit (420) and a second output node reset circuit (430), current drive capability of the first boost circuit (320) is higher than current drive capability of the second boost circuit (420), and current drive capability of the second output node reset circuit (430) is higher than current drive capability of the first output node reset circuit (330).
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公开(公告)号：US20160372043A1
公开(公告)日：2016-12-22
申请号：US14902382
申请日：2014-06-24
发明人： Shigetsugu YAMANAKA
IPC分类号： G09G3/3258 , G09G3/20 , G09G3/3266 , G09G3/3291
CPC分类号： G09G3/3258 , G09G3/2003 , G09G3/2025 , G09G3/3225 , G09G3/3233 , G09G3/3266 , G09G3/3291 , G09G2300/0426 , G09G2300/0452 , G09G2300/0809 , G09G2300/0861 , G09G2310/0235 , G09G2310/08 , G09G2320/0242 , G09G2320/0257 , H01L27/3213
摘要： A display device includes a display unit including multiple pixels, and a driving circuit that drives the display unit following a color assignation rule. The multiple pixels are classified into first through fourth groups such that groups to which the pixels belong are different from all groups to which pixels belong that are adjacent in eight directions, and pixels adjacent in 8 directions to pixels belonging to the same group, are of the same groups. The first through fourth colors are respectively assigned to the pixels of the first through fourth groups in the first subframe, the second through fourth and first colors are respectively assigned in the second subframe, the third, fourth, first, and second colors are respectively assigned in the third subframe, and the fourth and first through third colors are respectively assigned in the fourth subframe.
摘要翻译： 显示装置包括包括多个像素的显示单元和驱动电路，驱动电路根据颜色分配规则驱动显示单元。 多个像素被分类为第一至第四组，使得像素所属的组不同于八个方向上相邻的所有像素所属的组以及与八个方向相邻的八个方向的像素与属于同一组的像素相邻的像素 同一群体。 第一至第四颜色分别分配给第一子帧中的第一至第四组的像素，第二至第四颜色和第一颜色分别分配在第二子帧中，第三，第四，第一和第二颜色分别被分配 在第三子帧中分别分配第四和第三至第三颜色。
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公开(公告)号：US20160055791A1
公开(公告)日：2016-02-25
申请号：US14784391
申请日：2014-03-04
发明人： Noritaka KISHI , Hiromitsu KATSUI , Noboru NOGUCHI , Masanori OHARA , Shigetsugu YAMANAKA , Yoshifumi OHTA
IPC分类号： G09G3/30
CPC分类号： G09G3/30 , G09G3/3241 , G09G3/3266 , G09G2300/0426 , G09G2310/0202 , G09G2310/0251 , G09G2310/0275 , G09G2320/0285 , G09G2320/045 , G09G2330/021 , G09G2330/027 , G09G2330/028 , G09G2330/12
摘要： A data line drive circuit provides a voltage according to a detection voltage and to a reference voltage, between the gate and source of a drive transistor in a pixel circuit, and detects a drive current having passed through the drive transistor and outputted external to the pixel circuit. A threshold voltage correction memory stores, for each pixel circuit, data representing a threshold voltage of the drive transistor. A display control circuit controls the reference voltage based on the data stored in the threshold voltage correction memory. By this, even if the threshold voltage of the drive transistor is changed, the drive current can be detected with a high accuracy. The threshold voltage correction memory may store, for each pixel circuit, data representing a difference between the threshold voltage of the drive transistor and the reference voltage.
摘要翻译： 数据线驱动电路根据像素电路中的驱动晶体管的栅极和源极之间的检测电压和参考电压提供电压，并且检测通过驱动晶体管的驱动电流并输出到像素外部 电路。 阈值电压校正存储器针对每个像素电路存储表示驱动晶体管的阈值电压的数据。 显示控制电路基于存储在阈值电压校正存储器中的数据来控制参考电压。 由此，即使驱动晶体管的阈值电压发生变化，也能够高精度地检测驱动电流。 对于每个像素电路，阈值电压校正存储器可以存储表示驱动晶体管的阈值电压与参考电压之差的数据。
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公开(公告)号：US20230247868A1
公开(公告)日：2023-08-03
申请号：US17920426
申请日：2020-05-25
发明人： Shigetsugu YAMANAKA
IPC分类号： H10K59/126 , H10K59/131 , G09G3/3233
CPC分类号： H10K59/126 , H10K59/131 , G09G3/3233 , G09G2300/0819 , G09G2300/0842 , G09G2300/0861 , G09G2310/08 , G09G2310/0202 , G09G2360/14
摘要： In an organic EL display device including a proximity sensor, deterioration in display quality due to irradiation with IR light is suppressed. In the organic EL display device including the proximity sensor is provided with a light shielding unit that prevents a channel layer of a first initialization transistor from being irradiated with IR light, the first initialization transistor being provided in a pixel circuit in order to initialize a voltage that is applied to a control terminal of a drive transistor. The first initialization transistor preferably has a dual-gate structure. The first initialization transistor may have a LDD structure (including a one-side LDD structure).
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公开(公告)号：US20210110773A1
公开(公告)日：2021-04-15
申请号：US16468399
申请日：2017-09-21
IPC分类号： G09G3/3266 , G09G3/3291
摘要： Provided is a pixel circuit including: an electro-optical element, a driving transistor; a writing control transistor whose first conduction terminal is connected to a data line and whose control terminal is connected to a scanning line; and an initialization transistor whose first conduction terminal is connected to a control terminal of the driving transistor, to whose second conduction terminal an initialization voltage is applied, and whose control terminal is connected to a first control line. In a case of a P-channel transistor, a high-level voltage to be given to the control terminal of the initialization transistor is lower than a high-level voltage to be given to the control terminal of the writing control transistor.
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