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11.发明授权公开(公告)号：US10825395B2
公开(公告)日：2020-11-03
申请号：US15558068
申请日：2017-02-17
Inventor： Lei Chen , Chen Song , Airong Liu , Tangxiang Wang , Xuelian Cheng
IPC: G09G3/3258 , G09G3/3233 , H01L27/32 , H01L51/52 , G09G3/3291 , G09G3/3283
Abstract: Disclosed are a circuit and a method for detecting a driving current of an organic light emitting diode display device, and an organic light emitting diode display device, the method includes: after detecting for a predetermined time period, obtaining an output voltage of the integrating circuit, and comparing the output voltage with at least one reference voltage; in the case that the output voltage and the reference voltage satisfy a predetermined condition, adjusting capacitance of a capacitor of the integrating circuit.
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公开(公告)号：US10659049B2
公开(公告)日：2020-05-19
申请号：US16338349
申请日：2018-05-22
Applicant: BOE TECHNOLOGY GROUP CO., LTD.
Inventor： Tangxiang Wang
IPC: H03K19/0185 , H03K19/003
Abstract: The present disclosure provides a level shifting circuit which includes a boost subcircuit and a first phase-inverting subcircuit. The boost subcircuit has a first terminal being coupled to an input terminal of the level shifting circuit, a second terminal being coupled to a first high level signal terminal, a third terminal being coupled to a low level signal terminal, a fourth terminal being coupled to a first terminal of the first phase-inverting subcircuit; the first phase-inverting subcircuit has a second terminal being coupled to the first high level signal terminal, a third terminal being coupled to the low level signal terminal, a fourth terminal being coupled to a first output terminal of the level shifting circuit, the first phase-inverting subcircuit is configured to cause the third terminal to be electrically coupled to the fourth terminal when the first terminal thereof receives a high level signal.
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13.发明授权公开(公告)号：US10411489B2
公开(公告)日：2019-09-10
申请号：US15576644
申请日：2017-07-17
Applicant: BOE TECHNOLOGY GROUP CO., LTD.
Inventor： Chen Song , Airong Liu , Tangxiang Wang , Lei Chen
Abstract: A method is disclosed for controlling charging/discharging of a capacitor module. The capacitor module includes a plurality of branches connected in parallel, each of which includes a capacitor and a switch connected in series with the capacitor. The method includes measuring a first charge/discharge time for the capacitor module being charged/discharged from an initial voltage to an intermediate voltage, and To adjusting a second charge/discharge time for the capacitor module being further charged/discharged from the intermediate voltage to a target voltage by controlling on/off of at least one of the switches depending on the first charge/discharge time, the intermediate voltage being between the initial voltage and the target voltage. Also disclosed are an apparatus for controlling charging/discharging of a capacitor module and a display apparatus including the apparatus.
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公开(公告)号：US11804184B2
公开(公告)日：2023-10-31
申请号：US17607831
申请日：2020-11-30
Applicant: BOE TECHNOLOGY GROUP CO., LTD.
Inventor： Tangxiang Wang , Fei Yang
IPC: G11C19/28 , G09G3/3266 , G09G3/3275
CPC classification number: G09G3/3266 , G11C19/28 , G09G3/3275 , G09G2300/0426 , G09G2310/027 , G09G2310/0286 , G09G2310/0291 , G09G2310/08
Abstract: A source driver includes a plurality of shift register groups cascaded in sequence, an enable control circuit and at least one switching circuit electrically connected to the enable control circuit. Each shift register group includes a plurality of stages of shift registers, and is configured to sample digitized image data; a first start signal of an n-th shift register group is output by an (n−1)-th shift register group, n is a positive integer greater than 2. The enable control circuit is configured to output a first turn-on signal or a first turn-off signal. In two adjacent shift register groups, a last-stage shift register in a present shift register group is electrically connected to a first-stage shift register in a next shift register group through a switching circuit.
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公开(公告)号：US11323127B2
公开(公告)日：2022-05-03
申请号：US16607832
申请日：2019-04-18
Applicant: BOE TECHNOLOGY GROUP CO., LTD.
Inventor： Tangxiang Wang , Chen Song
Abstract: A digital-to-analog conversion circuit, a digital-to-analog conversion method, and a display device are provided. The digital-to-analog conversion circuit includes a first digital-to-analog conversion sub-circuit and a second digital-to-analog conversion sub-circuit. The second digital-to-analog conversion sub-circuit includes least-significant-bit voltage selection modules whose quantity is a, a weighed summation operational amplifier, switching control modules whose quantity is a and energy storage modules whose quantity is a. The weighted summation operational amplifier includes a reverse-phase input end, an operational amplification output end, and same-phase input ends whose quantity is a. The reverse-phase input end is connected to the operational amplification output end, and a is an integer greater than 1. The weighted summation operational amplifier is configured to perform weighted summation on voltages inputted by the a same-phase input ends at a digital-to-analog conversion stage to acquire an analog voltage, and output the analog voltage via the operational amplification output end.
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Patent Agency Ranking
16.发明授权公开(公告)号：US11296718B2
公开(公告)日：2022-04-05
申请号：US16766602
申请日：2019-12-16
Applicant: BOE TECHNOLOGY GROUP CO., LTD.
Inventor： Tangxiang Wang , Chen Song
Abstract: Digital-to-analog conversion circuit, digital-to-analog conversion method, display apparatus are disclosed. Digital-to-analog conversion circuit may comprise: voltage dividing sub-circuit comprising M voltage dividing signal terminals; decoding sub-circuit comprising M input and output terminals, M input terminals electrically coupled to first to Mth voltage dividing signal terminals of voltage dividing sub-circuit respectively, decoding sub-circuit configured to receive digital signal and select one of M input terminals to be electrically connected with output terminal according to digital signal; amplification sub-circuit comprising input and output terminals, input terminal of amplification sub-circuit electrically coupled to output terminal of decoding sub-circuit, amplification sub-circuit configured to amplify signal at its input terminal, output analog gray-scale voltage at output terminal, voltage dividing signal at voltage dividing signal terminal is less than or equal to ½ of maximum load voltage at output terminal of digital-to-analog conversion circuit, amplification sub-circuit has amplification coefficient N greater than or equal to 2.
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公开(公告)号：US11005428B2
公开(公告)日：2021-05-11
申请号：US16771289
申请日：2019-11-12
Applicant: BOE TECHNOLOGY GROUP CO., LTD.
Inventor： Tangxiang Wang
Abstract: The present disclosure relates to a differential input circuit, an amplifier circuit, and a display device. The differential input circuit comprises: a first power module, a second power module, a first shunt module, a second shunt module, a first output module, and a second output module. The first power module is controlled to output a first signal, a second signal, and a third signal through a first bias signal, and the second power module receives the first signal, and outputs a fourth signal and a fifth signal through a differential input signal. The first shunt module, the second shunt module, the first output module, and the second output module are controlled by the differential input signal so that the first output module and the second output module output signals under the control of the differential input signal.
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公开(公告)号：US10924099B2
公开(公告)日：2021-02-16
申请号：US16643241
申请日：2019-09-05
Applicant: BOE TECHNOLOGY GROUP CO., LTD.
Inventor： Tangxiang Wang , Chen Song
Abstract: Embodiments of the present disclosure provide a comparator. The comparator includes a first current source circuit, a pre-amplifier circuit, an amplifier circuit, a comparison circuit, and an output circuit. The first current source circuit is configured to provide a first constant current to the pre-amplifier circuit. The pre-amplifier circuit is configured to amplify a first input signal into a first pre-amplified signal and amplify a second input signal into a second pre-amplified signal based on a first constant current. The amplifier circuit includes a current mirror and a load circuit. The load circuit comprises a differential diode-connected transistor. The comparison circuit is configured to compare the first amplified signal with the second amplified signal. The output circuit is configured to output a first voltage or a second voltage based on a result of the comparison.
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公开(公告)号：US10797721B2
公开(公告)日：2020-10-06
申请号：US16520921
申请日：2019-07-24
Applicant: BOE Technology Group Co., Ltd.
Inventor： Tangxiang Wang , Chen Song , Zhan Gao
IPC: H03M1/78
Abstract: A digital to analog converter, a method for driving the same, and a display device are provided. The digital to analog converter includes: a first resistor string, 2m first multiplexers, a first voltage selector, a second resistor string, a second voltage selector, and a second multiplexer, where the 2m first multiplexers, the first voltage selector, and the second voltage selector operate in cooperation with each other so that the entire second resistor string can be connected in series to the first resistor string for further division.
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公开(公告)号：US20200074924A1
公开(公告)日：2020-03-05
申请号：US16441064
申请日：2019-06-14
Applicant: BOE Technology Group Co., Ltd.
Inventor： Tangxiang Wang , Chen Song
IPC: G09G3/3233
Abstract: Provided are an external compensation circuit and method, and display device in the field of display techniques. The external compensation circuit includes a regulation sub-circuit that may collect a driving current loaded to a light-emitting unit and a reference current from a reference current source, and regulate potentials at two nodes connected to a compensation sub-circuit according to the collected current, to enable the compensation sub-circuit to calibrate a data signal to be input to a pixel circuit according to a potential difference between the two nodes.
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