Power supply circuit and organic light-emitting diode display device

    公开(公告)号:US09799263B2

    公开(公告)日:2017-10-24

    申请号:US15141328

    申请日:2016-04-28

    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.

    Power supply voltage control circuit and method, driver integrated circuit, and display device

    公开(公告)号:US10386873B2

    公开(公告)日:2019-08-20

    申请号:US15508315

    申请日:2016-09-07

    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.

    Power supply circuit, driving method for the same and display device

    公开(公告)号:US10140917B2

    公开(公告)日:2018-11-27

    申请号:US15220991

    申请日:2016-07-27

    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.

    Organic light-emitting diode display assembly and display device

    公开(公告)号:US10043446B1

    公开(公告)日:2018-08-07

    申请号:US15322458

    申请日:2016-07-11

    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.

    Apparatus and method for controlling EL drive voltage of display panel

    公开(公告)号:US10510295B2

    公开(公告)日:2019-12-17

    申请号:US15739951

    申请日:2017-06-09

    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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