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公开(公告)号：US09799263B2
公开(公告)日：2017-10-24
申请号：US15141328
申请日：2016-04-28
Inventor： Chenggeng Zhang , Boya Zhang
IPC: G09G3/30 , G09G3/3208
CPC classification number: G09G3/3208 , G09G2320/029 , G09G2320/0626 , G09G2330/028
Abstract: The present invention provides a power supply circuit and an OLED display device, belongs to the field of OLED display technology, and can solve the problem that existing power supply circuits have low efficiency when brightness of the OLED display panel is low. The power supply circuit is used for proving an anode voltage and a cathode voltage for an OLED display panel, a difference between the anode voltage and the cathode voltage being a driving voltage, and the power supply circuit includes: a current detection unit for generating a control signal according to a driving current of the OLED display panel; and a driving voltage unit for generating, according to the control signal, a driving voltage positively correlated with the driving current, and including an anode voltage unit for generating an anode voltage and a cathode voltage unit for generating a cathode voltage.
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2.发明授权公开(公告)号：US10386873B2
公开(公告)日：2019-08-20
申请号：US15508315
申请日：2016-09-07
Inventor： Boya Zhang , Zhaohui Meng , Chenggeng Zhang , Lintao Zhang
IPC: G09G3/3225 , G05F1/46 , G05F1/10 , G09G3/3208
Abstract: Provided are a power supply voltage control circuit and a method thereof, a driver integrated circuit, and a display device. The power supply voltage control circuit comprises: a voltage detection unit (11) configured to detect a power supply voltage (ELVDD, ELVSS) received by the display panel (72) from a power supply circuit (73); a comparison unit (12) configured to obtain a voltage difference between the power supply voltage (ELVDD, ELVSS) and a reference voltage (VF1,VF2) through comparison; and a power supply voltage control unit (13) configured to transmit a power supply voltage control signal to the power supply circuit (73) according to the voltage difference and the reference voltage (VF1,VF2), so that the power supply circuit (73) outputs a corresponding power supply voltage to the display panel (72), so as to compensate for the voltage drop loss during voltage transmission, optimize display effect of the product, reduce effectively the voltage drop loss from the output terminal of the power supply circuit to the display panel side can be, and ensure consistency of the voltages inputted into the display panel.
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公开(公告)号：US10140917B2
公开(公告)日：2018-11-27
申请号：US15220991
申请日：2016-07-27
Inventor： Chenggeng Zhang , Boya Zhang
IPC: G09G1/00 , G09G3/3225
Abstract: Provided are a power supply circuit, a driving method for the same, and a display device. The power supply circuit comprises a first control sub-circuit, a second control sub-circuit, a voltage converting sub-circuit, a first output sub-circuit, and a second output sub-circuit; the first control sub-circuit controls the first voltage level terminal to be connected to the first node, the second control sub-circuit controls the second voltage level terminal to be connected to the second node, the voltage converting sub-circuit adjusts the voltage at the first node and the voltage at the second node, the first output sub-circuit outputs the voltage at the first node to the first output terminal, the second output sub-circuit outputs the voltage at the second node to the second output terminal. Structure of the power supply circuit can be simplified, and thereby manufacturing cost of the power supply circuit can be reduced.
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Patent Agency Ranking
公开(公告)号：US10043446B1
公开(公告)日：2018-08-07
申请号：US15322458
申请日：2016-07-11
Inventor： Chenggeng Zhang , Ying Liu
IPC: G09G3/3233 , G09G3/3258 , G09G3/00 , H02M1/36 , H01L27/32 , H02H3/087 , H02M1/00 , G09G3/36
Abstract: An OLED display assembly includes a DC-DC power source driver chip and an OLED display panel. The DC-DC power source driver chip is provided with a soft-start circuit including a first time-delay circuit, a first anti-surge circuit and a second anti-surge circuit. The first time-delay circuit is configured to disable the first anti-surge circuit and enable the second anti-surge circuit at an initialization stage, delay a voltage applied to an output end of the first time-delay circuit, and after the end of the initialization stage, enable the first anti-surge circuit and disable the second anti-surge circuit. The first anti-surge circuit is configured to control, after the end of the initialization stage, a voltage applied to the first input end of the OLED display panel. The second anti-surge circuit is configured to control, at the initialization stage, a voltage applied to the first input end of the OLED display panel.
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公开(公告)号：US09886896B2
公开(公告)日：2018-02-06
申请号：US15511204
申请日：2016-03-07
Inventor： Boya Zhang , Chenggeng Zhang
CPC classification number: G09G3/3208 , G01R19/0092 , G09G3/32 , G09G2330/028 , H02M3/156 , H05B33/0815 , H05B33/0896 , H05B37/02
Abstract: Embodiments of the disclosure provide a power supply circuit for powering an OLED panel and a display panel. The power supply circuit for powering the OLED panel reduces the voltage outputted by the DC-DC conversion circuit in the power supply circuit based on a target current. Moreover, the maximum value of the current that can be outputted by the DC-DC conversion circuit when outputting the reduced voltage is not less than the target current. The target current may be a current outputted by the DC-DC conversion circuit to the OLED panel at a time before a K-th preset duration counting from the latest preset duration for receiving the preset pulse signal.
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公开(公告)号：US10553153B2
公开(公告)日：2020-02-04
申请号：US15521564
申请日：2016-08-30
Applicant: BOE TECHNOLOGY GROUP CO., LTD.
Inventor： Ying Liu , Chenggeng Zhang , Zhaohui Meng , Hongwei Tian , Juanjuan Bai , Meng Shao , Wen Sun , Can Zheng , Hualing Yang
IPC: G09G3/3233
Abstract: A method, a circuit and a display device for driving an organic light emitting diode, wherein a driving transistor (DTFT) for driving a display element is turned off by jumping one or more of a reference voltage input (Vref), a reset voltage input (Vinit) and a data signal input (Vdata) before beginning to output an EL high level (ELVDD) of a pixel compensation circuit and after beginning to output an EL low level (ELVSS), to overcome the splash screen phenomenon during power-up and direct current-direct current driving failure.
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公开(公告)号：US10510295B2
公开(公告)日：2019-12-17
申请号：US15739951
申请日：2017-06-09
Inventor： Chenggeng Zhang , Nan Lu , Yufei Wang , Hualing Yang , Jing Liu
IPC: G09G3/3258 , G09G3/3233 , G09G3/3225
Abstract: An apparatus for controlling an EL drive voltage for a display panel is disclosed, which includes a current sensing circuit configured to detect an EL drive current signal outputted to the display panel, and convert the EL drive current signal into a first voltage signal, a signal generation circuit configured to generate a pulse signal based on the first voltage signal, a current protection circuit configured to generate a first control signal based on the first voltage signal and a reference voltage, and a signal coupling circuit configured to output, based on the first control signal, the pulse signal or a low level signal as a second control signal to control the EL drive voltage. According to the embodiments of the present disclosure, the EL drive voltage of the display panel can be dynamically controlled, and be reset to normal when it is overhigh.
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公开(公告)号：US10037733B2
公开(公告)日：2018-07-31
申请号：US15520681
申请日：2015-12-23
Inventor： Chenggeng Zhang , Boya Zhang
IPC: H03K3/00 , G09G3/3283 , H03K3/012
CPC classification number: G09G3/3283 , G09G3/3208 , G09G2300/0426 , G09G2310/08 , G09G2330/028 , G09G2330/04 , H02M1/32 , H02M1/36 , H03K3/012 , H05B33/0809 , H05B33/0896
Abstract: The present disclosure discloses an enable signal generation circuit, comprising: an input module configured to input a direct current signal from the first input terminal to a first node; a transmission module configured to transmit the direct current signal at the first node to an output terminal; a first conducting module and a second conducting module configured to conduct signals in an alternating current signal from the second input terminal to the first node; a first filter module configured to filter the signal at the first node such that, at the first node, the alternating current signal from the second input terminal is conducted to a common terminal. The second input terminal is connected to the output terminal. The present disclosure simplifies the circuit structure and solves the problem caused by the difference between timing sequences of inputted signals.
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