CN114882840B - Display panel driving power circuit - Google Patents

Display panel driving power circuit Download PDF

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Publication number
CN114882840B
CN114882840B CN202210690635.3A CN202210690635A CN114882840B CN 114882840 B CN114882840 B CN 114882840B CN 202210690635 A CN202210690635 A CN 202210690635A CN 114882840 B CN114882840 B CN 114882840B
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China
Prior art keywords
power supply
module
power
voltage
capacitor
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CN202210690635.3A
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CN114882840A (en
Inventor
林红全
莫正毅
史进丰
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Guangdong Magic Display Technology Co ltd
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Guangdong Magic Display Technology Co ltd
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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
    • G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
    • G09G3/3225—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
    • Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]

Abstract

The invention discloses a display panel driving power supply circuit which comprises a power supply voltage input module, a central control module, a first voltage conversion module, a second voltage conversion module and a third voltage conversion module which are connected with an external power supply, wherein the signal input end of the first voltage conversion module is connected with a first data port of the central control module, the signal input end of the second voltage conversion module is connected with a second data port of the central control module, the signal input end of the third voltage conversion module is connected with a third data port of the central control module, the power supply input ends of the voltage conversion modules are respectively connected with the power supply output ends of the power supply voltage input modules, the central control module respectively inputs different level signals to the power supply voltages of the voltage conversion modules, and then the power supply voltages of the voltage conversion modules are converted into three paths of source end voltages required by an OLED display panel.

Description

Display panel driving power circuit
Technical Field
The application relates to the technical field of display panels, in particular to a display panel driving power supply circuit.
Background
The traditional LCD and thinner and lighter OLED are included in the display panel, AMOLED in the OLED is an important terminal display technology such as a high-end smart phone, a television and intelligent wearable equipment, a technology with a higher output value is provided, the display panel belongs to a novel flat panel display industry, source end voltages required by the OLED display panel are mainly three voltages of AVDD, ELVDD and ELVSS respectively, a driving IC board on a screen body needs AVDD to supply power, the screen body needs three voltages to supply power, so that the three voltages needed at present need to be converted into different working voltages respectively, a digital-to-analog conversion module is further added in a driving power circuit of the traditional display panel, but three source end voltages are all fixed, a central control module can directly control voltage conversion, and the digital-to-analog conversion module is added to-analog conversion module so that the circuit is more complex, the enterprise is not beneficial to put into production, and design and development cost is increased along with the addition of the digital-to-analog conversion module.
Disclosure of Invention
The invention provides a display panel driving power supply circuit which is used for solving the problem that the prior art cannot simply finish three-path source terminal voltage conversion.
In order to achieve the above purpose, the present invention provides the following technical solutions: the display panel driving power supply circuit comprises a power supply voltage input module, a central control module, a first voltage conversion module, a second voltage conversion module and a third voltage conversion module which are connected with an external power supply, wherein the signal input end of the first voltage conversion module is connected with a first data port of the central control module, the power supply input end of the first voltage conversion module is connected with the power supply output end of the power supply voltage input module, the power supply output end of the first voltage conversion module outputs power to an external display panel to supply AVDD, the signal input end of the second voltage conversion module is connected with a second data port of the central control module, the power supply output end of the second voltage conversion module is connected with the power supply output end of the power supply voltage input module, the signal input end of the second voltage conversion module is connected with a third data port of the central control module, the power supply input end of the third voltage conversion module is connected with the power supply output end of the power supply voltage input module, the signal input end of the third voltage conversion module is connected with a fourth data port of the central control module, the signal input end of the second voltage conversion module is connected with a fourth data port of the power supply voltage conversion module, and the fourth data port of the power supply module is connected with a fourth data port of the power supply module is connected with an external display panel, and the fourth data port of the power supply is provided with a current limiting resistor, and the fourth data port of the power supply is connected with the fourth data port of the power supply module.
The first voltage conversion module comprises an inductor L1, a voltage stabilizing tube D1, a resistor R6, a resistor R5, a sliding rheostat VR1, a capacitor C4, a capacitor C5 and a boost converter U2, wherein a signal input end of the boost converter U2 is connected with a first data port of the central control module, the resistor R5 is connected between the first data port of the central control module and the ground, the power input end of the boost converter U2 is connected with a power output end of the power voltage input module, a first end of the inductor L1 is connected with a power output end of the power voltage input module, a power output end of the boost converter U2 is connected with a positive end of the voltage stabilizing tube D1, a second end of the inductor L1 is connected with a positive end of the voltage stabilizing tube D1, a negative end of the voltage stabilizing tube D1 is the power output end of the first voltage conversion module, a negative end of the voltage stabilizing tube D1 is connected with the resistor R6, a first end of the resistor VR 6 is connected with the voltage stabilizing tube C1, a second end of the resistor VR is connected with the capacitor C1 is connected with the capacitor C4, and the sliding rheostat C1 is connected with the positive end of the capacitor C1, and the sliding rheostat C4 is connected with the capacitor C1.
The second voltage conversion module comprises an inductor L2, a voltage stabilizing tube D2, a resistor R7, a resistor R8, a sliding rheostat VR2, a capacitor C6, a capacitor C7 and a boost converter U3, wherein a signal input end of the boost converter U3 is connected with a second data port of the central control module, the resistor R8 is connected between the second data port of the central control module and the ground, the power input end of the boost converter U3 is connected with a power output end of the power voltage input module, a first end of the inductor L2 is connected with a power output end of the power voltage input module, a power output end of the boost converter U3 is connected with a positive end of the voltage stabilizing tube D2, a second end of the inductor L2 is connected with a positive end of the voltage stabilizing tube D2, a negative end of the voltage stabilizing tube D2 is the power output end of the first voltage conversion module, a negative end of the voltage stabilizing tube D2 is connected with the resistor R7, a first end of the resistor VR 7 is connected with the second end of the boost converter U2, a second end of the resistor VR is connected with the capacitor C6 is connected with the positive end of the capacitor C2, and the sliding rheostat C6 is connected with the second end of the capacitor C2.
The third voltage conversion module comprises a resistor R9, a capacitor C8, a capacitor C9, a capacitor C10 and an inverter U4, wherein a signal input end of the inverter U4 is connected with a third data port of the central control module, the resistor R9 is connected between the third data port of the central control module and the ground, a power input end of the inverter U4 is connected with a power output end of the power voltage input module, the capacitor C10 is connected between the power output end of the power voltage input module and the ground, the capacitor C8 is externally connected with the inverter U4, and the capacitor C9 is connected between the power output end of the inverter U4 and the ground.
The power input end of the central control module is connected with the power output end of the power voltage input module, the central control module is externally connected with an RC clock circuit, and a reset port of the central control module is connected with a power-on reset circuit.
As described above, the RC clock circuit comprises a crystal oscillator Y1, a resistor R1, a capacitor C1 and a capacitor C2, wherein the capacitor C1 is connected between the clock port of the central control module and the ground, the clock port of the central control module is connected with the first end of the resistor R1, the capacitor C2 is connected between the second end of the resistor R1 and the ground, the crystal oscillator Y1 is connected with the clock port of the central control module, the crystal oscillator Y1 is connected with the capacitor C1 in parallel, one end of the crystal oscillator Y1 is grounded through the capacitor C1, and the other end of the crystal oscillator Y1 is grounded through the capacitor C2.
The power-on reset circuit comprises a resistor R2 and a capacitor C3, wherein a first end of the resistor R2 is connected with a power output end of the power supply voltage input module, a second end of the resistor R2 is connected with a reset port of the central control module, a first end of the capacitor C3 is connected with the reset port of the central control module, and a second end of the capacitor C3 is grounded.
Compared with the prior art, the application has the following advantages:
according to the invention, different level signals are respectively input to the first voltage conversion module, the second voltage conversion module and the third voltage conversion module through the central control module, then the power supply voltage input to each voltage conversion module is converted into three paths of source end voltages required by the OLED display panel, meanwhile, the digital-to-analog conversion module is omitted, so that the circuit structure is simpler, the device is suitable for practical use, the production cost is saved, the problem that the three paths of source end voltage conversion cannot be completed more simply in the prior art is solved, the design mode mainly breaks through the AMOLED display technical field, the new growth point is cultivated in the middle-high-end consumption field, and the device is also extremely beneficial to the enterprise to put into production.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings that are required to be used in the description of the embodiments will be briefly described below.
FIG. 1 is a circuit block diagram of the present invention;
FIG. 2 is a circuit diagram of a portion of a power supply voltage input module according to the present invention;
FIG. 3 is a circuit diagram of a central control module portion of the present invention;
FIG. 4 is a circuit diagram of a first voltage conversion module portion of the present invention;
FIG. 5 is a circuit diagram of a second voltage conversion module portion of the present invention;
fig. 6 is a circuit diagram of a third voltage conversion module portion in the present invention.
Detailed Description
In order to make the technical problems, technical schemes and beneficial effects solved by the invention more clear, the invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
When embodiments of the present invention refer to the ordinal terms "first," "second," etc., it is to be understood that they are merely used for distinguishing between them unless the order of their presentation is indeed dependent on the context.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
As shown in fig. 1-3, the display panel driving power supply circuit includes a power supply voltage input module connected with an external power supply, a central control module, a first voltage conversion module, a second voltage conversion module and a third voltage conversion module, wherein a signal input end of the first voltage conversion module is connected with a first data port of the central control module, a power supply input end of the first voltage conversion module is connected with a power supply output end of the power supply voltage input module, a power supply output end of the first voltage conversion module outputs power to an external display panel to provide AVDD, a signal input end of the second voltage conversion module is connected with a second data port of the central control module, a power supply input end of the second voltage conversion module is connected with a power supply output end of the power supply voltage input module, a power supply output end of the second voltage conversion module outputs ELVDD to an external display panel, a signal input end of the third voltage conversion module is connected with a third data port of the central control module, a power supply input end of the third voltage conversion module is connected with a power supply input end of the ELVDD, a current limiting resistor is connected with a power supply input end of the fourth voltage conversion module, and a current limiting resistor is connected with a power supply end of the fourth voltage conversion module, and a current limiting resistor is connected with the power supply end of the third voltage conversion module.
In this embodiment, the power supply voltage input module may provide a power supply voltage for the first voltage conversion module, the second voltage conversion module and the third voltage conversion module, the central control module may input a corresponding control enable signal for the first voltage conversion module, the first voltage conversion module may convert an input 3V power supply voltage into a voltage required by AVDD, the central control module may input a corresponding control enable signal for the second voltage conversion module, the second voltage conversion module may convert an input 3V power supply voltage into a voltage required by ELVDD, the central control module may input a corresponding control enable signal for the third voltage conversion module, the third voltage conversion module may convert an input 3V power supply voltage into a voltage required by ELVSS, and meanwhile, the digital-analog conversion module is omitted, so that the circuit structure is simpler, the circuit structure is suitable for practical use, the production cost is saved, the problem that the prior art cannot simply complete three-way source voltage conversion is solved, the resistor R3 and the resistor R4 have a current limiting function, the fourth data of the central control module connected to the central control module and the fourth control module and the fifth control module, which is connected to the external display panel, and the fifth data of the OLED display module is protected.
Further, the first voltage conversion module includes inductance L1, steady voltage tube D1, resistance R6, resistance R5, slide rheostat VR1, electric capacity C4, electric capacity C5 and boost converter U2, boost converter U2's signal input part with well accuse module's first data port is connected, connect between well accuse module's first data port and the ground resistance R5, boost converter U2's power input part with power voltage input module's power output part is connected, inductance L1's first end with power voltage input module's power output part is connected, boost converter U2's power output part with steady voltage tube D1's positive pole end is connected, inductance L1's second end with steady voltage tube D1's positive pole end is connected, steady voltage tube D1's negative pole end is the power output end of first voltage conversion module, steady voltage tube D1's negative pole end with resistance R6's power input part is connected with power voltage input module's power output part, resistance VR 6's first end with the power output part is connected with electric capacity VR2, slide rheostat and C1's the signal feedback end is connected with electric capacity C4, slide rheostat C1 is connected with the electric capacity C1.
In this embodiment, the boost converter U2 is an LM2733 0.6MHz and 1.6MHz boost converter with a 40V internal FET switch and packaged with SOT-23, the central control module inputs a corresponding control enable signal to the boost converter U2, the boost converter U2 boosts the input 3V supply voltage, and then outputs the voltage required by AVDD; the inductor L1 is configured to delay the current to protect the boost converter U2, the voltage regulator D1 regulates the voltage output by the boost converter U2, the capacitor C4 prevents voltage abrupt change to protect the boost converter U2, the capacitor C5 filters crosstalk and spike pulses at the output end of the boost converter U2, the resistor R6 and the sliding resistor VR1 form a voltage sampling network, the voltage sampling network transmits a level signal of a reference voltage to a feedback signal port of the boost converter U2, the level signal is a feedback signal for feeding back the magnitude of the output voltage, and the sliding resistor VR1 regulates the magnitude of the output voltage according to the feedback signal, because the boost converter U2 is enabled at a high level, the resistor R5 is a pull-down resistor, and the input high-level signal is pulled down, so that the boost converter U2 can be turned off.
Further, the second voltage conversion module includes inductance L2, steady voltage tube D2, resistance R7, resistance R8, slide rheostat VR2, electric capacity C6, electric capacity C7 and boost converter U3, boost converter U3's signal input part with the second data port of well accuse module is connected, connect between the second data port of well accuse module and the ground resistance R8, boost converter U3's power input part with power supply voltage input module's power output part is connected, inductance L2's first end with power supply voltage input module's power output part is connected, boost converter U3's power output part with steady voltage tube D2's positive pole end is connected, inductance L2's second end with steady voltage tube D2's positive pole end is connected, steady voltage tube D2's negative pole end is the power output end of first voltage conversion module, steady voltage tube D2's negative pole end with resistance R7's power input end with power supply voltage input module's power output part is connected, resistance VR 7's first end with the power supply voltage input module's power output part is connected, slide rheostat VR2 is connected with second end C6, slide rheostat is connected with the electric capacity C2 the positive pole end of steady voltage tube D2, slide rheostat is connected with the electric capacity C6.
In this embodiment, the boost converter U3 is an LM2733 0.6MHz and 1.6MHz boost converter with a 40V internal FET switch and packaged with SOT-23, the central control module inputs a corresponding control enable signal to the boost converter U3, the boost converter U3 boosts the input 3V supply voltage, and then outputs the voltage required by ELVDD; the inductor L2 is used for protecting the boost converter U3 by slowing down the current, the voltage stabilizing tube D2 is used for stabilizing the voltage output by the boost converter U3, the capacitor C6 is used for preventing voltage mutation so as to protect the boost converter U3, the capacitor C7 is used for filtering crosstalk and spike pulses at the output end of the boost converter U3, the resistor R7 and the sliding rheostat VR2 form a voltage sampling network, the voltage sampling network is used for transmitting a level signal of a reference voltage to a feedback signal port of the boost converter U3, the level signal is a feedback signal used for feeding back the magnitude of the output voltage, and the sliding rheostat VR2 is used for adjusting the magnitude of the output voltage according to the feedback signal, because the boost converter U3 is enabled at a high level, the resistor R8 is a pull-down resistor and plays a role of turning off the boost converter U3 by pulling down the input high-level signal.
Further, the third voltage conversion module includes a resistor R9, a capacitor C8, a capacitor C9, a capacitor C10 and an inverter U4, a signal input end of the inverter U4 is connected with a third data port of the central control module, the resistor R9 is connected between the third data port of the central control module and the ground, a power input end of the inverter U4 is connected with a power output end of the power voltage input module, the capacitor C10 is connected between the power output end of the power voltage input module and the ground, the capacitor C8 is externally connected to the inverter U4, and the capacitor C9 is connected between the power output end of the inverter U4 and the ground.
In this embodiment, the inverter is an SGM3204 type inverter, the central control module inputs a corresponding control enable signal to the inverter U4, and the inverter U4 performs boost conversion on the input 3V power supply voltage and then outputs a voltage required by ELVSS; the capacitor C8 prevents voltage abrupt change so as to protect the inverter U4, the C9 is a filter capacitor and is used for filtering crosstalk and spike of the output voltage of the power supply voltage input module, the C10 is a filter capacitor and is used for filtering crosstalk and spike of the output voltage of the inverter U4, and because the inverter U4 is enabled by high level, the resistor R9 is a pull-down resistor and is used for pulling down an input high level signal, so that the effect of turning off the inverter U4 can be achieved.
Further, the power input end of the central control module is connected with the power output end of the power voltage input module, the central control module is externally connected with an RC clock circuit, the reset port of the central control module is connected with a power-on reset circuit, in this embodiment, a chip adopted by the central control module is an STM32L412 chip, the power voltage input module can provide working voltage for the central control module, the RC clock circuit provides clock signals for the central control module, and the power-on reset circuit is used for completing the reset function of the central control module.
Further, the RC clock circuit includes a crystal oscillator Y1, a resistor R1, a capacitor C1 and a capacitor C2, where the crystal oscillator Y1 is connected to a clock port of the central control module, the crystal oscillator Y1 is connected in parallel with the resistor R1, one end of the crystal oscillator Y1 is grounded through the capacitor C1, and the other end of the crystal oscillator Y1 is grounded through the capacitor C2, in this embodiment, the crystal oscillator Y1 makes the central control module work in a stable frequency range, and the resistor R1, the capacitor C1 and the capacitor C2 form an RC filter circuit for filtering interference to the crystal oscillator.
Further, the power-on reset circuit includes a resistor R2 and a capacitor C3, where a first end of the resistor R2 is connected to a power output end of the power supply voltage input module, a second end of the resistor R2 is connected to a reset port of the central control module, a first end of the capacitor C3 is connected to a reset port of the central control module, and a second end of the capacitor C3 is grounded, in this embodiment, when the capacitor C3 is not passed through at first, an RST end is at a low level, and when the capacitor C3 is slowly fully charged, the RST end is equivalent to the first end of the capacitor C3 being changed from the first low level to the high level, and this level change completes the reset function of the central control module.
Working principle:
the central control module inputs a corresponding control enabling signal to the first voltage conversion module, the first voltage conversion module converts the input 3V power supply voltage into a voltage required by AVDD through the boost converter U1, the central control module inputs a corresponding control enabling signal to the second voltage conversion module, the second voltage conversion module converts the input 3V power supply voltage into a voltage required by ELVDD through the boost converter U2, the central control module inputs a corresponding control enabling signal to the third voltage conversion module, the third voltage conversion module converts the input 3V power supply voltage into a voltage required by ELVSS through the inverter U4, and the three source end voltages AVDD, ELVDD and ELVSS supply power to an external display panel.
The above description of one embodiment provided in connection with a particular disclosure is not intended to limit the practice of this application to that particular disclosure. Any approximation, or substitution of techniques for the methods, structures, etc. of the present application or for the purposes of making a number of technological deductions or substitutions based on the concepts of the present application should be considered as the scope of protection of the present application.

Claims (6)

1. The display panel driving power supply circuit is characterized by comprising a power supply voltage input module, a central control module, a first voltage conversion module, a second voltage conversion module and a third voltage conversion module which are connected with an external power supply, wherein the signal input end of the first voltage conversion module is connected with a first data port of the central control module, the power supply input end of the first voltage conversion module is connected with the power supply output end of the power supply voltage input module, the power supply output end of the first voltage conversion module outputs power to an external display panel to provide AVDD, the signal input end of the second voltage conversion module is connected with a second data port of the central control module, the power supply input end of the second voltage conversion module is connected with the power supply output end of the power supply voltage input module, the power supply output end of the second voltage conversion module outputs power to an external display panel to provide ELVDD, the signal input end of the third voltage conversion module is connected with a third data port of the central control module, the power supply voltage input end of the third voltage conversion module is connected with a power supply voltage input end of the third voltage conversion module to a fourth data port of the power supply module, and the current limiting resistor of the fourth voltage conversion module is connected with a power supply voltage input end of the fourth power supply module, and the current limiting resistor of the fourth power supply module is connected with the external display panel, and the fourth power supply voltage conversion module is provided with a current limiting resistor, and the current limiting resistor is connected with the power supply module;
the first voltage conversion module comprises an inductor L1, a voltage stabilizing tube D1, a resistor R6, a resistor R5, a slide rheostat VR1, a capacitor C4, a capacitor C5 and a boost converter U2, wherein a signal input end of the boost converter U2 is connected with a first data port of the central control module, the resistor R5 is connected between the first data port of the central control module and the ground, a power input end of the boost converter U2 is connected with a power output end of the power voltage input module, a first end of the inductor L1 is connected with a power output end of the power voltage input module, a power output end of the boost converter U2 is connected with an anode end of the voltage stabilizing tube D1, a second end of the inductor L1 is connected with a positive end of the voltage stabilizing tube D1, a negative end of the voltage stabilizing tube D1 is connected with a first end of the resistor R6, a second end of the resistor R6 is connected with a power output end of the power voltage stabilizing tube VR1, a second end of the inductor U2 is connected with a second end of the boost converter C1, a second end of the boost converter is connected with a capacitor C4, and a signal output end of the boost converter C1 is connected with the capacitor C4, and the slide rheostat C1 is connected with the capacitor C1.
2. The display panel driving power supply circuit according to claim 1, wherein the second voltage conversion module comprises an inductor L2, a voltage stabilizing tube D2, a resistor R7, a resistor R8, a sliding resistor VR2, a capacitor C6, a capacitor C7 and a boost converter U3, wherein a signal input end of the boost converter U3 is connected to a second data port of the central control module, the resistor R8 is connected between the second data port of the central control module and the ground, a power input end of the boost converter U3 is connected to a power output end of the power voltage input module, a first end of the inductor L2 is connected to a power output end of the power voltage input module, a power output end of the boost converter U3 is connected to a positive end of the voltage stabilizing tube D2, a negative end of the boost converter U2 is connected to a power output end of the first voltage conversion module, a negative end VR 7 of the boost converter is connected to the second end of the boost converter U2, a signal output end of the boost converter U7 is connected to the second end of the boost converter U2, a signal output end of the boost converter U2 is connected to the second end of the boost converter U2, and a negative end of the boost converter C6 is connected to the second end of the boost converter U2, and a signal output end of the boost converter U2 is connected to the second end of the boost converter.
3. The display panel driving power supply circuit according to claim 1, wherein the third voltage conversion module comprises a resistor R9, a capacitor C8, a capacitor C9, a capacitor C10 and an inverter U4, a signal input end of the inverter U4 is connected with a third data port of the central control module, the resistor R9 is connected between the third data port of the central control module and the ground, a power input end of the inverter U4 is connected with a power output end of the power voltage input module, the capacitor C10 is connected between a power output end of the power voltage input module and the ground, the capacitor C8 is externally connected to the inverter U4, and the capacitor C9 is connected between a power output end of the inverter U4 and the ground.
4. The display panel driving power supply circuit according to claim 1, wherein a power input end of the central control module is connected with a power output end of the power voltage input module, the central control module is externally connected with an RC clock circuit, and a reset port of the central control module is connected with a power-on reset circuit.
5. The display panel driving power supply circuit according to claim 4, wherein the RC clock circuit comprises a crystal oscillator Y1, a resistor R1, a capacitor C1 and a capacitor C2, the crystal oscillator Y1 is connected to the clock port of the central control module, the crystal oscillator Y1 is connected in parallel to the resistor R1, one end of the crystal oscillator Y1 is grounded through the capacitor C1, and the other end of the crystal oscillator Y1 is grounded through the capacitor C2.
6. The display panel driving power supply circuit according to claim 4, wherein the power-on reset circuit comprises a resistor R2 and a capacitor C3, a first end of the resistor R2 is connected to the power output end of the power supply voltage input module, a second end of the resistor R2 is connected to the reset port of the central control module, a first end of the capacitor C3 is connected to the reset port of the central control module, and a second end of the capacitor C3 is grounded.
CN202210690635.3A 2022-06-18 2022-06-18 Display panel driving power circuit Active CN114882840B (en)

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CN103889118B (en) * 2014-03-18 2016-02-10 深圳创维－Rgb电子有限公司 A kind of OLED drive electric power unit
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CN208157021U (en) * 2018-05-29 2018-11-27 上海和辉光电有限公司 A kind of power control circuit
CN209418110U (en) * 2019-01-04 2019-09-20 上海和辉光电有限公司 A kind of power circuit and OLED display of display device
CN111429845A (en) * 2020-04-30 2020-07-17 京东方科技集团股份有限公司 Power management integrated circuit, driving method, circuit board and display device
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