WO2020103231A1 - 显示装置、显示面板电源系统及其电路 - Google Patents

显示装置、显示面板电源系统及其电路

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Publication number
WO2020103231A1
WO2020103231A1 PCT/CN2018/120807 CN2018120807W WO2020103231A1 WO 2020103231 A1 WO2020103231 A1 WO 2020103231A1 CN 2018120807 W CN2018120807 W CN 2018120807W WO 2020103231 A1 WO2020103231 A1 WO 2020103231A1
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WIPO (PCT)
Prior art keywords
voltage
terminal
digital
resistor
power supply
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Ceased
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PCT/CN2018/120807
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English (en)
French (fr)
Inventor
熊志
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
HKC Co Ltd
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HKC Co Ltd
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Publication date
Priority claimed from CN201821939676.7U external-priority patent/CN208954615U/zh
Priority claimed from CN201811397019.9A external-priority patent/CN109256104B/zh
Application filed by HKC Co Ltd filed Critical HKC Co Ltd
Priority to US16/312,375 priority Critical patent/US10742119B2/en
Publication of WO2020103231A1 publication Critical patent/WO2020103231A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20Control 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
    • G09G3/34Control 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 by control of light from an independent source
    • G09G3/36Control 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 by control of light from an independent source using liquid crystals

Definitions

  • the present application belongs to the field of display technology, and particularly relates to a display device, a display panel power supply system, and a circuit thereof.
  • Thin film transistor liquid crystal display (Thin film transistor liquid display, usually abbreviated as TFT-LCD) is a type of most liquid crystal displays, which uses thin film transistor technology to improve image quality. Although TFT-LCD is collectively referred to as LCD, it is an active matrix LCD that is used in televisions, flat panel displays, and projectors.
  • the traditional thin film crystal LCD drive system power supply architecture and Source Driver IC (data driver chip) is generated by the power chip HVAA, VDDA and VDDD three-way voltage, the gamma chip generates gamma voltage, and then through PCB (Printed Circuit Board Printed circuit board) traces are connected to the Source Driver IC; DC-DC IC needs to generate HVAA, VDDA, VDDD and other voltages, resulting in complex DC-DC IC design, higher cost, and more PCB traces, increasing PCB area And costs.
  • the purpose of the present application is to provide a power supply circuit for a display panel, which aims to solve the problems of complex power chip design, higher cost, more PCB wiring, and increased PCB area and cost in the conventional technical solutions.
  • An embodiment of the present application provides a display panel power circuit connected between an external power supply and a data driving chip.
  • the display panel power circuit includes:
  • a power chip connected to the external power supply and configured to convert the external power supply into a first voltage and a second voltage
  • the gamma chip is connected to the power chip and the data driving chip, receives the first voltage and the second voltage, and generates a gamma voltage according to the first voltage and the second voltage;
  • the data-driven chip has a third voltage generation circuit, the third voltage generation circuit is connected to the gamma chip, and generates a third voltage according to the gamma voltage;
  • the first voltage, the second voltage and the third voltage are all working voltages of the data driving chip.
  • the third voltage generating circuit includes a first resistor, a second resistor, a first switching tube, and a second switching tube, and the first end of the first resistor serves as the third voltage generating circuit
  • a first input terminal, the first terminal of the second resistor serves as the second input terminal of the third voltage generating circuit
  • the second terminal of the first resistor is connected to the second terminal of the second resistor
  • the input end of the first switch tube is connected to the power chip, the input end of the second switch tube is grounded, the output end of the first switch tube is connected to the output end of the second switch tube, and the first switch tube Is connected to the control terminal of the second switch tube
  • the common connection terminal of the first resistor and the second resistor is connected to the control terminal of the first switch tube and the common control terminal of the second switch tube
  • the connection terminal, the common connection terminal of the output terminal of the first switch tube and the output terminal of the second switch tube serve as the output terminal of the third voltage generating circuit.
  • the first switch tube is an NPN transistor
  • the second switch tube is a PNP transistor
  • the first switch tube is a MOS tube
  • the second switch tube is a MOS tube
  • the gamma voltage includes N output voltages, where N> 2, any two of the N output voltages are connected to the third voltage generating circuit.
  • N 18, wherein the ninth voltage and the tenth voltage are both connected to the third voltage generating circuit.
  • the data driving chip further includes a first digital-to-analog converter, a second digital-to-analog converter, a first amplifier, a second amplifier, a first load resistor, a second load resistor, a first capacitor, and a first Two capacitors; the input terminal of the first digital-to-analog converter is connected to the gamma chip, the output terminal of the first digital-to-analog converter is connected to the non-inverting input terminal of the first amplifier, and the first digital-to-analog converter The inverting input of the converter is connected to the output of the first digital-to-analog converter, the first load resistor and the first capacitor are connected in series between the output of the first digital-to-analog converter and ground, The power terminal of the first digital-analog converter is connected to the power chip, the ground terminal of the first digital-analog converter is connected to the third voltage generating circuit, and the input terminal of the second digital-analog converter is connected to the In the gamma
  • the power supply system for a display panel includes: an external power supply, a data driving chip, and a display panel power supply circuit connected between the external power supply and the data driving chip;
  • the power supply circuit of the display panel includes:
  • a power chip connected to the external power supply and configured to convert the external power supply into a first voltage and a second voltage
  • the gamma chip is connected to the power chip and the data driving chip, receives the first voltage and the second voltage, and generates a gamma voltage according to the first voltage and the second voltage;
  • a third voltage generating circuit connected to the gamma chip and generating a third voltage according to the gamma voltage, the third voltage generating circuit is provided in the data-driven chip;
  • the first voltage, the second voltage and the third voltage are all working voltages of the data driving chip.
  • the third voltage generating circuit includes a first resistor, a second resistor, a first switching tube, and a second switching tube, and the first end of the first resistor serves as the third voltage generating circuit
  • a first input terminal, the first terminal of the second resistor serves as the second input terminal of the third voltage generating circuit
  • the second terminal of the first resistor is connected to the second terminal of the second resistor
  • the input end of the first switch tube is connected to the power chip, the input end of the second switch tube is grounded, the output end of the first switch tube is connected to the output end of the second switch tube, and the first switch tube Is connected to the control terminal of the second switch tube
  • the common connection terminal of the first resistor and the second resistor is connected to the control terminal of the first switch tube and the common control terminal of the second switch tube
  • the connection terminal, the common connection terminal of the output terminal of the first switch tube and the output terminal of the second switch tube serve as the output terminal of the third voltage generating circuit.
  • the first switch tube is an NPN transistor
  • the second switch tube is a PNP transistor
  • the first switch tube is a MOS tube
  • the second switch tube is a MOS tube
  • the gamma voltage includes N output voltages, where N is a positive integer not less than 2, and any two of the N output voltages are connected to the third voltage generating circuit.
  • N 18, wherein the ninth voltage and the tenth voltage are both connected to the third voltage generating circuit.
  • the power chip is a switching power supply voltage regulator integrated circuit.
  • the data driving chip further includes a first digital-to-analog converter, a second digital-to-analog converter, a first amplifier, a second amplifier, a first load resistor, a second load resistor, a first capacitor, and a first Two capacitors; the input terminal of the first digital-to-analog converter is connected to the gamma chip, the output terminal of the first digital-to-analog converter is connected to the non-inverting input terminal of the first amplifier, and the first digital-to-analog converter The inverting input of the converter is connected to the output of the first digital-to-analog converter, the first load resistor and the first capacitor are connected in series between the output of the first digital-to-analog converter and ground, The power terminal of the first digital-analog converter is connected to the power chip, the ground terminal of the first digital-analog converter is connected to the third voltage generating circuit, and the input terminal of the second digital-analog converter is connected to the In the gamma
  • the display device includes the above-mentioned display panel power supply system.
  • the third voltage generating circuit includes a first resistor, a second resistor, a first switching tube, and a second switching tube, and the first end of the first resistor serves as the third voltage generating circuit
  • a first input terminal, the first terminal of the second resistor serves as the second input terminal of the third voltage generating circuit
  • the second terminal of the first resistor is connected to the second terminal of the second resistor
  • the input end of the first switch tube is connected to the power chip, the input end of the second switch tube is grounded, the output end of the first switch tube is connected to the output end of the second switch tube, and the first switch tube Is connected to the control terminal of the second switch tube
  • the common connection terminal of the first resistor and the second resistor is connected to the control terminal of the first switch tube and the common control terminal of the second switch tube
  • the connection terminal, the common connection terminal of the output terminal of the first switch tube and the output terminal of the second switch tube serve as the output terminal of the third voltage generating circuit.
  • the first switch tube is an NPN transistor
  • the second switch tube is a PNP transistor
  • the third voltage generating circuit includes a first resistor, a second resistor, a first switching tube, and a second switching tube, and the first end of the first resistor serves as the third voltage generating circuit
  • a first input terminal, the first terminal of the second resistor serves as the second input terminal of the third voltage generating circuit
  • the second terminal of the first resistor is connected to the second terminal of the second resistor
  • the input end of the first switch tube is connected to the power chip, the input end of the second switch tube is grounded, the output end of the first switch tube is connected to the output end of the second switch tube, and the first switch tube Is connected to the control terminal of the second switch tube
  • the common connection terminal of the first resistor and the second resistor is connected to the control terminal of the first switch tube and the common control terminal of the second switch tube
  • the connection terminal, the common connection terminal of the output terminal of the first switch tube and the output terminal of the second switch tube serve as the output terminal of the third voltage generating circuit.
  • the power supply circuit of the display panel improves the internal design of the data driving chip, uses the voltage output from the original gamma chip, connects to the HVAA position of the power supply terminal of the data driving chip through the third voltage generating circuit, and cancels the power chip
  • the third voltage output circuit achieves the goals of reducing costs, reducing the area of the circuit board, and improving product competitiveness.
  • FIG. 1 is a schematic structural diagram of a power supply circuit of a display panel according to an embodiment of the present application
  • FIG. 2 is an example circuit schematic diagram of a third voltage generating circuit in the power supply circuit of the display panel shown in FIG. 1;
  • FIG. 3 is a partial circuit schematic diagram of a data driving chip provided by an embodiment of the present application.
  • An embodiment of the present application provides a display panel power supply system.
  • the display panel power supply system includes: an external power supply 40, a data driving chip 30, and a display panel power supply circuit connected between the external power supply 40 and the data driving chip 30.
  • the display driving circuit will The external power supply 40 is converted into the working voltage required by the data driving chip 30 to maintain the normal operation of the data driving chip 30.
  • the data driving chip 30 may be any device or circuit having a data driving function for pixels of the display panel, for example, a source driver chip (Source Driver IC) or a thin film source driver chip (S-COF, Source-Chip on Film) etc.
  • a source driver chip Source Driver IC
  • S-COF thin film source driver chip
  • the display panel can be any type of display panel, such as a liquid crystal display panel based on TFT-LCD (Thin Film Transistor Liquid Crystal) technology, and a liquid crystal display (LCD) technology LCD panel, organic electro-laser display panel based on OLED (Organic Electroluminescence) technology, quantum dot light-emitting diode display panel or curved surface based on QLED (Quantum Dot Light Emitting Diodes) technology Display panel, etc.
  • TFT-LCD Thin Film Transistor Liquid Crystal
  • LCD liquid crystal display
  • OLED Organic Electroluminescence
  • QLED Quantum Dot Light Emitting Diodes
  • the display panel power circuit is connected between the external power source 40 and the data driving chip 30.
  • the display panel power circuit includes the power chip 10, the gamma chip 20 and the third voltage generating circuit 31 provided in the data driving chip 30.
  • the power supply chip 10 is connected to the external power supply 40 and is configured to convert the external power supply 40 into a first voltage VDDA and a second voltage VDDD.
  • the first voltage VDDA and the second voltage VDDD are output to the gamma chip 20 and the data driving chip 30.
  • the gamma chip 20 is connected to the power chip 10 and the data driving chip 30, receives the first voltage VDDA and the second voltage VDDD, and generates a gamma voltage according to the first voltage VDDA and the second voltage VDDD.
  • the gamma voltage includes N output voltages, N> 2, and any two of the N output voltages are connected to the third voltage generating circuit.
  • the gamma chip 20 receives the first voltage VDDA and the second voltage VDDD, and generates a total of 18 voltages from GAM1 to GAM18, and then connects to the data driving chip 30 through circuit board traces to output the 18 voltages to Data drive chip 30.
  • the display panel power supply circuit further includes a third voltage generating circuit 31 provided on the data driving chip 30.
  • the third voltage generating circuit 31 is connected to the gamma chip 20 and generates a third voltage HVAA according to the gamma voltage.
  • the above-mentioned first voltage VDDA, second voltage VDDD and third voltage HVAA are all working voltages of the data driving chip 30.
  • the data driving chip 30 is connected to the third voltage generating circuit 31 according to the connected ninth voltage GAM9 and the tenth voltage GAM10 and the two voltages, thereby generating a third voltage HVAA .
  • the third voltage generating circuit 31 includes a first resistor R1, a second resistor R2, a first switching transistor Q1 and a second switching transistor Q2, and the first end of the first resistor R1 serves as the first input of the third voltage generating circuit 31 Terminal, the first terminal of the second resistor R2 serves as the second input terminal of the third voltage generating circuit 31, the second terminal of the first resistor R1 is connected to the second terminal of the second resistor R2, and the input terminal of the first switch Q1 is connected In the power chip 10, the input terminal of the second switch tube Q2 is grounded, the output terminal of the first switch tube Q1 is connected to the output terminal of the second switch tube Q2, and the control terminal of the first switch tube Q1 is connected to the control terminal of the second switch tube Q2, The common connection terminal of the
  • the first switch Q1 is an NPN transistor
  • the second switch Q2 is a PNP transistor.
  • the emitter of the first switch Q1 is connected to the power chip 10, the emitter of the second switch Q2 is grounded, the collector of the first switch Q1 is connected to the collector of the second switch Q2, and the base of the first switch Q1 is connected
  • the base of the second switch Q2 the common connection of the base of the first switch Q1 and the base of the second switch Q2 are connected to the common connection of the first resistor R1 and the second resistor R2, the first switch Q1
  • the common connection terminal of the collector of the second transistor Q2 and the collector of the second switching transistor Q2 serves as the output terminal of the third voltage generating circuit 31.
  • the first switching transistor Q1 and the second switching transistor Q2 may be replaced by MOS transistors or other electronic switching devices that achieve equivalent functions.
  • the third voltage HVVA is connected to the amplifier circuit in the data driving chip, and is set to provide the working power required by the amplifier in the data driving chip.
  • the data driving chip 30 further includes a first digital-to-analog converter 32, a second digital-to-analog converter 33, a first amplifier 34, a second amplifier 35, a first load resistor R3, a second load resistor R4, and a first capacitor C1 and the second capacitor C2;
  • the input terminal of the first digital-to-analog converter 32 is connected to the gamma chip 20
  • the output terminal of the first digital-to-analog converter 32 is connected to the non-inverting input terminal of the first amplifier 34
  • the first digital-to-analog converter 32 The inverting input terminal is connected to the output terminal of the first digital-to-analog converter 32.
  • the first load resistor R3 and the first capacitor C1 are connected in series between the output terminal of the first digital-to-analog converter 32 and ground.
  • the power terminal of the converter 32 is connected to the power chip 10
  • the ground terminal of the first digital-to-analog converter 32 is connected to the third voltage generating circuit 31
  • the input terminal of the second digital-to-analog converter 33 is connected to the gamma chip 20, and the second digital-to-analog converter
  • the output terminal of 33 is connected to the non-inverting input terminal of the second amplifier 35
  • the inverting input terminal of the second digital-to-analog converter 33 is connected to the output terminal of the second digital-to-analog converter 33
  • the second load resistor R4 and the second capacitor C2 are connected in series
  • the power terminal of the second digital-analog converter 33 is connected to the third voltage generating circuit 31, and the ground terminal of the second digital-analog converter 33 is grounded.
  • the input terminals of the first digital-to-analog converter 32 input GAM1-GAM9 total 9 channels voltage
  • the input terminals of the second digital-to-analog converter 33 input GAM10-GAM18 total 9 channels voltage
  • the third voltage HVAA required in the above circuit is
  • the third voltage generating circuit 31 built in the data driving chip 30 provides that there is no need to configure a third voltage unit on the power chip 10, which not only reduces the design cost and design complexity of the power chip 10, but also reduces the wiring of the circuit board and reduces Production costs.
  • the present application further provides a display device, the display device comprising: the above-mentioned display panel power supply system.
  • the present application further provides a display device, the display device comprising: the above-mentioned display panel power supply system.
  • the embodiments of the present application provide a display panel power supply system and a display panel power supply circuit thereof.
  • the display panel power supply system includes: an external power supply 40, a data driving chip 30, and a connection between the external power supply 40 and the data driving chip 30
  • the display panel power circuit includes a power chip 10, a gamma chip 20, and a third voltage generating circuit 31 provided in the data driving chip 30.
  • the third voltage HVAA generated inside the third voltage generating circuit 31 is connected to the position of the power supply terminal HVAA of the data driving chip 30, and the third in the power chip 10 is eliminated
  • the voltage HVAA produces a circuit that reduces costs, reduces board area, and improves product competitiveness.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Liquid Crystal Display Device Control (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)

Abstract

一种显示装置、显示面板电源系统及其电路,显示面板电源电路包括:电源芯片(10),与外部电源连接;伽马芯片(20),与电源芯片(10)以及数据驱动芯片(30)连接。

Description

显示装置、显示面板电源系统及其电路
本申请要求于2018年11月22日提交中国专利局,申请号为201811397019.9,发明名称为“显示装置、显示面板电源系统及其电路”的中国专利申请的优先权,其全部内容通过引用结合在本申请中。
技术领域
本申请属于显示技术领域,尤其涉及一种显示装置、显示面板电源系统及其电路。
背景技术
这里的陈述仅提供与本申请有关的背景信息,而不必然构成现有技术。
薄膜晶体管液晶显示器(Thin film transistor liquid crystal display,通常简称为TFT-LCD)是多数液晶显示器的一种,它使用薄膜晶体管技术改善影像品质。虽然TFT-LCD被统称为LCD,不过它是种主动式矩阵LCD,被应用在电视、平面显示器及投影机上。
传统的薄膜晶体液晶显示器的驱动系统电源架构以及Source Driver IC(数据驱动芯片)是由电源芯片产生HVAA、VDDA和VDDD三路电压、伽马芯片产生伽马电压,然后通过PCB(Printed Circuit Board,印刷电路板)走线连接到Source Driver IC内部;因DC-DC IC需要产生HVAA、VDDA、VDDD等电压,造成DC-DC IC设计复杂、成本较高,且PCB走线较多,增加PCB面积及成本。
因此,传统的技术方案中存在电源芯片设计复杂、成本较高,且PCB走线较多,增加PCB面积及成本的问题。
申请内容
本申请的目的在于提供一种显示面板电源电路,旨在解决传统的技术方案中存在的电源芯片设计复杂、成本较高,且PCB走线较多,增加PCB面积及成本的问题。
本申请实施例提供一种显示面板电源电路,连接与外部电源和数据驱动芯片之间,所述显示面板电源电路包括:
电源芯片,与所述外部电源连接,设置为将所述外部电源转换为第一电压、第二电压;
伽马芯片,与所述电源芯片以及所述数据驱动芯片连接,接收所述第一电压和所述第二电压,并根据所述第一电压和所述第二电压生成伽马电压;
所述数据驱动型芯片具有第三电压产生电路,所述第三电压产生电路与所述伽马芯片连接,根据所述伽马电压生成第三电压;
其中,所述第一电压、所述第二电压和所述第三电压均为所述数据驱动芯片的工作电压。
在一个实施例中,所述第三电压产生电路包括第一电阻、第二电阻、第一开关管和第二开关管,所述第一电阻的第一端作为所述第三电压产生电路的第一输入端,所述第二电阻的第一端作为所述第三电压产生电路的第二输入端,所述第一电阻的第二端连接所述第二电阻的第二端,所述第一开关管的输入端连接所述电源芯片,所述第二开关管的输入端接地,所述第一开关管的输出端连接所述第二开关管的输出端,所述第一开关管的控制端连接所述第二开关管的控制端,所述第一电阻和所述第二电阻的公共连接端连接所述第一开关管的控制端和所述第二开关管的控制的公共连接端,所述第一开关管的输出端和所述第二开关管的输出端的公共连接端作为所述第三电压产生电路的输出端。
在一个实施例中,所述第一开关管为NPN型三极管,所述第二开关管为PNP型三极管。
在一个实施例中,所述第一开关管为MOS管,所述第二开关管为MOS管。
在一个实施例中,所述伽马电压包括N路输出电压,其中,N>2,N路输出电压中的任意两路电压连接所述第三电压产生电路。
在一个实施例中,N=18,其中,第9路电压和第10路电压均连接所述第三电压产生电路。
在一个实施例中,所述数据驱动芯片还包括第一数模转换器、第二数模转换器、第一放大器、第二放大器、第一负载电阻、第二负载电阻、第一电容和第二电容;所述第一数模转换器的输入端连接所述伽马芯片,所述第一数模转换器的输出端连接所述第一放大器的同相输入端,所述第一数模转换器的反相输入端连接所述第一数模转换器的输出端,所述第一负载电阻和所述第一电容串接于所述第一数模转换器的输出端和地之间,所述第一数模转换器的电源端连接所述电源芯片,所述第一数模转换器的接地端连接所述第三电压产生电路,所述第二数模转换器的输入端连接所述伽马芯片,所述第二数模转换器的输出端连接所述第二放大器的同相输入端,所述第二数模转换器的反相输入端连接所述第二数模转换器的输出端,所述第二负载电阻和所述第二电容串接于所述第二数模转换器的输出端和地之间,所述第二数模转换器的电源端连接所述第三电压产生电路,所述第二数模转换器的接地端接地。
此外,还提供了一种显示面板电源系统,所述显示面板电源系统包括:外部电源、数据驱动芯片以及连接与外部电源和数据驱动芯片之间的显示面板电源电路;
其中,所述显示面板电源电路包括:
电源芯片,与所述外部电源连接,设置为将所述外部电源转换为第一电压、第二电压;
伽马芯片,与所述电源芯片以及所述数据驱动芯片连接,接收所述第一电压和所述第二电压,并根据所述第一电压和所述第二电压生成伽马电压;
第三电压产生电路,与所述伽马芯片连接,根据所述伽马电压生成第三电压,所述第三电压产生电路设于所述数据驱动型芯片内;
所述第一电压、所述第二电压和所述第三电压均为所述数据驱动芯片的工作电压。
在一个实施例中,所述第三电压产生电路包括第一电阻、第二电阻、第一开关管和第二开关管,所述第一电阻的第一端作为所述第三电压产生电路的第一输入端,所述第二电阻的第一端作为所述第三电压产生电路的第二输入端,所述第一电阻的第二端连接所述第二电阻的第二端,所述第一开关管的输入端连接所述电源芯片,所述第二开关管的输入端接地,所述第一开关管的输出端连接所述第二开关管的输出端,所述第一开关管的控制端连接所述第二开关管的控制端,所述第一电阻和所述第二电阻的公共连接端连接所述第一开关管的控制端和所述第二开关管的控制的公共连接端,所述第一开关管的输出端和所述第二开关管的输出端的公共连接端作为所述第三电压产生电路的输出端。
在一个实施例中,所述第一开关管为NPN型三极管,所述第二开关管为PNP型三极管。
在一个实施例中,所述第一开关管为MOS管,所述第二开关管为MOS管。
在一个实施例中,所述伽马电压包括N路输出电压,其中,N为不小于2的正整数,N路输出电压中的任意两路电压连接所述第三电压产生电路。
在一个实施例中,N=18,其中,第9路电压和第10路电压均连接所述第三电压产生电路。
在一个实施例中,所述电源芯片为开关电源稳压集成电路。
在一个实施例中,所述数据驱动芯片还包括第一数模转换器、第二数模转换器、第一放大器、第二放大器、第一负载电阻、第二负载电阻、第一电容和第二电容;所述第一数模转换器的输入端连接所述伽马芯片,所述第一数模转换器的输出端连接所述第一放大器的同相输入端,所述第一数模转换器的反相输入端连接所述第一数模转换器的输出端,所述第一负载电阻和所述第一电容串接于所述第一数模转换器的输出端和地之间,所述第一数模转换器的电源端连接所述电源芯片,所述第一数模转换器的接地端连接所述第三电压产生电路, 所述第二数模转换器的输入端连接所述伽马芯片,所述第二数模转换器的输出端连接所述第二放大器的同相输入端,所述第二数模转换器的反相输入端连接所述第二数模转换器的输出端,所述第二负载电阻和所述第二电容串接于所述第二数模转换器的输出端和地之间,所述第二数模转换器的电源端连接所述第三电压产生电路,所述第二数模转换器的接地端接地。
此外,还提供了一种显示装置,所述显示装置包括:上述的显示面板电源系统。
在一个实施例中,所述第三电压产生电路包括第一电阻、第二电阻、第一开关管和第二开关管,所述第一电阻的第一端作为所述第三电压产生电路的第一输入端,所述第二电阻的第一端作为所述第三电压产生电路的第二输入端,所述第一电阻的第二端连接所述第二电阻的第二端,所述第一开关管的输入端连接所述电源芯片,所述第二开关管的输入端接地,所述第一开关管的输出端连接所述第二开关管的输出端,所述第一开关管的控制端连接所述第二开关管的控制端,所述第一电阻和所述第二电阻的公共连接端连接所述第一开关管的控制端和所述第二开关管的控制的公共连接端,所述第一开关管的输出端和所述第二开关管的输出端的公共连接端作为所述第三电压产生电路的输出端。
在一个实施例中,所述第一开关管为NPN型三极管,所述第二开关管为PNP型三极管。
在一个实施例中,所述第三电压产生电路包括第一电阻、第二电阻、第一开关管和第二开关管,所述第一电阻的第一端作为所述第三电压产生电路的第一输入端,所述第二电阻的第一端作为所述第三电压产生电路的第二输入端,所述第一电阻的第二端连接所述第二电阻的第二端,所述第一开关管的输入端连接所述电源芯片,所述第二开关管的输入端接地,所述第一开关管的输出端连接所述第二开关管的输出端,所述第一开关管的控制端连接所述第二开关管的控制端,所述第一电阻和所述第二电阻的公共连接端连接所述第一开关管的控制端和所述第二开关管的控制的公共连接端,所述第一开关管的输出端和所 述第二开关管的输出端的公共连接端作为所述第三电压产生电路的输出端。
本申请实施例显示面板电源电路通过改进数据驱动芯片内部设计,使用原伽马芯片输出的电压,通过第三电压产生电路内部产生第三电压连接到数据驱动芯片电源端HVAA位置,取消电源芯片中的第三电压产出电路,达到了降低成本、减小电路板的面积,提高产品竞争力的目的。
附图说明
图1为本申请一实施例提供的显示面板电源电路结构示意图;
图2为图1所示的显示面板电源电路中第三电压产生电路的示例电路原理图;
图3为本申请一实施例提供的数据驱动芯片的部分电路原理图。
具体实施方式
为了使本技术领域的人员更好地理解本申请方案,下面将结合本申请实施例中的附图,对本申请实施例中的技术方案进行清楚地描述,显然,所描述的实施例是本申请一部分的实施例,而不是全部的实施例。基于本申请中的实施例,本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例,都应当属于本申请保护的范围。
本申请的说明书和权利要求书及上述附图中的术语“包括”以及它们任何变形,意图在于覆盖不排他的包含。例如包含一系列步骤或单元的过程、方法或系统、产品或设备没有限定于已列出的步骤或单元,而是可选地还包括没有列出的步骤或单元,或可选地还包括对于这些过程、方法、产品或设备固有的其它步骤或单元。此外,术语“第一”、“第二”和“第三”等是设置为区别不同对象,而非设置为描述特定顺序。
为了说明本申请所述的技术方案,以下结合具体附图及实施例进行详细说明。
本申请实施例提供一种显示面板电源系统,该显示面板电源系统包括:外 部电源40、数据驱动芯片30以及连接与外部电源40和数据驱动芯片30之间的显示面板电源电路,显示器驱动电路将外部电源40转换为数据驱动芯片30所需的工作电压,以维持数据驱动芯片30的正常工作。
在应用中,数据驱动芯片30可以是任意的具有对显示面板的像素进行数据驱动功能的任意器件或电路,例如,源极驱动芯片(Source Driver IC)或薄膜源极驱动芯片(S-COF,Source-Chip on Film)等。
在应用中,显示面板可以为任意类型的显示面板,例如基于TFT-LCD(Thin Film Transistor Liquid Crystal Display,薄膜晶体管液晶显示器)技术的液晶显示面板、基于LCD(Liquid Crystal Display,液晶显示装置)技术的液晶显示面板、基于OLED(Organic Electro Luminesence Display,有机电激光显示)技术的有机电激光显示面板、基于QLED(Quantum Dot Light Emitting Diodes,量子点发光二极管)技术的量子点发光二极管显示面板或曲面显示面板等。
其中,显示面板电源电路连接与外部电源40和数据驱动芯片30之间,该显示面板电源电路包括电源芯片10、伽马芯片20以及设于数据驱动芯片30中的第三电压产生电路31。
电源芯片10与外部电源40连接,设置为将外部电源40转换为第一电压VDDA和第二电压VDDD,第一电压VDDA和第二电压VDDD输出至伽马芯片20以及数据驱动芯片30,一方面,提供数据驱动芯片30所需的工作电压,另一方面,提供伽马芯片20的输入电压。
伽马芯片20与电源芯片10以及数据驱动芯片30连接,接收第一电压VDDA和第二电压VDDD,并根据第一电压VDDA和第二电压VDDD生成伽马电压。伽马电压包括N路输出电压,N>2,N路输出电压中的任意两路电压连接第三电压产生电路。在一个示例中,伽马芯片20接收第一电压VDDA和第二电压VDDD,并产生GAM1~GAM18共计18路电压,然后通过电路板走线连接到数据驱动芯片30,将该18路电压输出至数据驱动芯片30。
显示面板电源电路还包括设于数据驱动芯片30的具有第三电压产生电路 31,第三电压产生电路31与伽马芯片20连接,根据伽马电压生成第三电压HVAA。其中,上述的第一电压VDDA、第二电压VDDD和第三电压HVAA均为数据驱动芯片30的工作电压。
如图2所示,在一个示例中,数据驱动芯片30根据接入的第9路电压GAM9和第10路电压GAM10、两路电压连接到第三电压产生电路31,从而产生出第三电压HVAA。其中,第三电压产生电路31包括第一电阻R1、第二电阻R2、第一开关管Q1和第二开关管Q2,第一电阻R1的第一端作为第三电压产生电路31的第一输入端,第二电阻R2的第一端作为第三电压产生电路31的第二输入端,第一电阻R1的第二端连接第二电阻R2的第二端,第一开关管Q1的输入端连接电源芯片10,第二开关管Q2的输入端接地,第一开关管Q1的输出端连接第二开关管Q2的输出端,第一开关管Q1的控制端连接第二开关管Q2的控制端,第一电阻R1和第二电阻R2的公共连接端连接第一开关管Q1的控制端和第二开关管Q2的控制端的公共连接端,第一开关管Q1的输出端和第二开关管Q2的输出端的公共连接端作为第三电压产生电路31的输出端。
进一步,第一开关管Q1为NPN型三极管,第二开关管Q2为PNP型三极管。第一开关管Q1的发射极连接电源芯片10,第二开关管Q2的发射极接地,第一开关管Q1的集电极连接第二开关管Q2的集电极,第一开关管Q1的基极连接第二开关管Q2的基极,第一开关管Q1的基极和第二开关管Q2的基极的公共连接端连接第一电阻R1和第二电阻R2的公共连接端,第一开关管Q1的集电极和第二开关管Q2的集电极的公共连接端作为第三电压产生电路31的输出端。在其他实施例中,第一开关管Q1和第二开关管Q2可以由实现同等功能的MOS管或其他电子开关器件代替。
如图3所示,在应用中,第三电压HVVA连接数据驱动芯片中的放大器电路,设置为提供数据驱动芯片中的放大器所需的工作电源。具体的,数据驱动芯片30还包括第一数模转换器32、第二数模转换器33、第一放大器34、第二放大器35、第一负载电阻R3、第二负载电阻R4、第一电容C1和第二电容C2; 第一数模转换器32的输入端连接伽马芯片20,第一数模转换器32的输出端连接第一放大器34的同相输入端,第一数模转换器32的反相输入端连接第一数模转换器32的输出端,第一负载电阻R3和第一电容C1串接于第一数模转换器32的输出端和地之间,第一数模转换器32的电源端连接电源芯片10,第一数模转换器32的接地端连接第三电压产生电路31,第二数模转换器33的输入端连接伽马芯片20,第二数模转换器33的输出端连接第二放大器35的同相输入端,第二数模转换器33的反相输入端连接第二数模转换器33的输出端,第二负载电阻R4和第二电容C2串接于第二数模转换器33的输出端和地之间,第二数模转换器33的电源端连接第三电压产生电路31,第二数模转换器33的接地端接地。第一数模转换器32的输入端输入GAM1~GAM9共计9路电压,第二数模转换器33的输入端输入GAM10~GAM18共计9路电压,上述的电路中所需的第三电压HVAA由数据驱动芯片30中内置的第三电压产生电路31提供,无需在电源芯片10上配置第三电压单元,不仅降低了电源芯片10的设计成本和设计复杂度,同时减少了电路板的布线,降低了生产成本。
基于上述的显示面板电源系统,本申请还提供了一种显示装置,该显示装置包括:上述的显示面板电源系统。
此外,基于上述的显示面板电源系统,本申请还提供了一种显示装置,所述显示装置包括:上述的显示面板电源系统。
综上,本申请实施例提供了一种显示面板电源系统及其显示面板电源电路,该显示面板电源系统包括:外部电源40、数据驱动芯片30以及连接与外部电源40和数据驱动芯片30之间的显示面板电源电路,该显示面板电源电路包括电源芯片10、伽马芯片20以及设于数据驱动芯片30中的第三电压产生电路31。通过修改数据驱动芯片30内部设计,使用伽马芯片20输出的电压,通过第三电压产生电路31内部产生第三电压HVAA连接到数据驱动芯片30电源端HVAA位置,取消电源芯片10中的第三电压HVAA产出电路,达到了降低成本、减小电路板的面积,提高产品竞争力。
以上所述仅为本申请的较佳实施例而已,并不用以限制本申请,凡在本申请的精神和原则之内所作的任何修改、等同替换和改进等,均应包含在本申请的保护范围之内。

Claims (20)

  1. 一种显示面板电源电路,与外部电源和数据驱动芯片连接,其中,所述显示面板电源电路包括:
    电源芯片,与所述外部电源连接,设置为将所述外部电源转换为第一电压、第二电压;
    伽马芯片,与所述电源芯片以及所述数据驱动芯片连接,接收所述第一电压和所述第二电压,并根据所述第一电压和所述第二电压生成伽马电压;
    第三电压产生电路,与所述伽马芯片连接,根据所述伽马电压生成第三电压,所述第三电压产生电路设于所述数据驱动型芯片内;
    所述第一电压、所述第二电压和所述第三电压均为所述数据驱动芯片的工作电压。
  2. 如权利要求1所述的显示面板电源电路,其中,所述第三电压产生电路包括第一电阻、第二电阻、第一开关管和第二开关管,所述第一电阻的第一端作为所述第三电压产生电路的第一输入端,所述第二电阻的第一端作为所述第三电压产生电路的第二输入端,所述第一电阻的第二端连接所述第二电阻的第二端,所述第一开关管的输入端连接所述电源芯片,所述第二开关管的输入端接地,所述第一开关管的输出端连接所述第二开关管的输出端,所述第一开关管的控制端连接所述第二开关管的控制端,所述第一电阻和所述第二电阻的公共连接端连接所述第一开关管的控制端和所述第二开关管的控制的公共连接端,所述第一开关管的输出端和所述第二开关管的输出端的公共连接端作为所述第三电压产生电路的输出端。
  3. 如权利要求2所述的显示面板电源电路,其中,所述第一开关管为NPN型三极管,所述第二开关管为PNP型三极管。
  4. 如权利要求2所述的显示面板电源电路,其中,所述第一开关管为MOS管,所述第二开关管为MOS管。
  5. 如权利要求1所述的显示面板电源电路,其中,所述伽马电压包括N路 输出电压,其中,N为不小于2的正整数,N路输出电压中的任意两路电压连接所述第三电压产生电路。
  6. 如权利要求5所述的显示面板电源电路,其中,N=18,其中,第9路电压和第10路电压均连接所述第三电压产生电路。
  7. 如权利要求1所述的显示面板电源电路,其中,所述电源芯片为开关电源稳压集成电路。
  8. 如权利要求1所述的显示面板电源电路,其中,所述数据驱动芯片还包括第一数模转换器、第二数模转换器、第一放大器、第二放大器、第一负载电阻、第二负载电阻、第一电容和第二电容;所述第一数模转换器的输入端连接所述伽马芯片,所述第一数模转换器的输出端连接所述第一放大器的同相输入端,所述第一数模转换器的反相输入端连接所述第一数模转换器的输出端,所述第一负载电阻和所述第一电容串接于所述第一数模转换器的输出端和地之间,所述第一数模转换器的电源端连接所述电源芯片,所述第一数模转换器的接地端连接所述第三电压产生电路,所述第二数模转换器的输入端连接所述伽马芯片,所述第二数模转换器的输出端连接所述第二放大器的同相输入端,所述第二数模转换器的反相输入端连接所述第二数模转换器的输出端,所述第二负载电阻和所述第二电容串接于所述第二数模转换器的输出端和地之间,所述第二数模转换器的电源端连接所述第三电压产生电路,所述第二数模转换器的接地端接地。
  9. 一种显示面板电源系统其中,所述显示面板电源系统包括:外部电源、数据驱动芯片以及连接与外部电源和数据驱动芯片之间的显示面板电源电路;
    其中,所述显示面板电源电路包括:
    电源芯片,与所述外部电源连接,设置为将所述外部电源转换为第一电压、第二电压;
    伽马芯片,与所述电源芯片以及所述数据驱动芯片连接,接收所述第一电压和所述第二电压,并根据所述第一电压和所述第二电压生成伽马电压;
    第三电压产生电路,与所述伽马芯片连接,根据所述伽马电压生成第三电压,所述第三电压产生电路设于所述数据驱动型芯片内;
    所述第一电压、所述第二电压和所述第三电压均为所述数据驱动芯片的工作电压。
  10. 如权利要求9所述的显示面板电源电路,其中,所述第三电压产生电路包括第一电阻、第二电阻、第一开关管和第二开关管,所述第一电阻的第一端作为所述第三电压产生电路的第一输入端,所述第二电阻的第一端作为所述第三电压产生电路的第二输入端,所述第一电阻的第二端连接所述第二电阻的第二端,所述第一开关管的输入端连接所述电源芯片,所述第二开关管的输入端接地,所述第一开关管的输出端连接所述第二开关管的输出端,所述第一开关管的控制端连接所述第二开关管的控制端,所述第一电阻和所述第二电阻的公共连接端连接所述第一开关管的控制端和所述第二开关管的控制的公共连接端,所述第一开关管的输出端和所述第二开关管的输出端的公共连接端作为所述第三电压产生电路的输出端。
  11. 如权利要求10所述的显示面板电源电路,其中,所述第一开关管为NPN型三极管,所述第二开关管为PNP型三极管。
  12. 如权利要求10所述的显示面板电源电路,其中,所述第一开关管为MOS管,所述第二开关管为MOS管。
  13. 如权利要求9所述的显示面板电源电路,其中,所述伽马电压包括N路输出电压,其中,N为不小于2的正整数,N路输出电压中的任意两路电压连接所述第三电压产生电路。
  14. 如权利要求13所述的显示面板电源电路,其中,N=18,其中,第9路电压和第10路电压均连接所述第三电压产生电路。
  15. 如权利要求9所述的显示面板电源电路,其中,所述电源芯片为开关电源稳压集成电路。
  16. 如权利要求9所述的显示面板电源电路,其中,所述数据驱动芯片还 包括第一数模转换器、第二数模转换器、第一放大器、第二放大器、第一负载电阻、第二负载电阻、第一电容和第二电容;所述第一数模转换器的输入端连接所述伽马芯片,所述第一数模转换器的输出端连接所述第一放大器的同相输入端,所述第一数模转换器的反相输入端连接所述第一数模转换器的输出端,所述第一负载电阻和所述第一电容串接于所述第一数模转换器的输出端和地之间,所述第一数模转换器的电源端连接所述电源芯片,所述第一数模转换器的接地端连接所述第三电压产生电路,所述第二数模转换器的输入端连接所述伽马芯片,所述第二数模转换器的输出端连接所述第二放大器的同相输入端,所述第二数模转换器的反相输入端连接所述第二数模转换器的输出端,所述第二负载电阻和所述第二电容串接于所述第二数模转换器的输出端和地之间,所述第二数模转换器的电源端连接所述第三电压产生电路,所述第二数模转换器的接地端接地。
  17. 一种显示装置,其中,所述显示装置包括:
    外部电源、数据驱动芯片以及连接与外部电源和数据驱动芯片之间的显示面板电源电路;
    其中,所述显示面板电源电路包括:
    电源芯片,与所述外部电源连接,设置为将所述外部电源转换为第一电压、第二电压;
    伽马芯片,与所述电源芯片以及所述数据驱动芯片连接,接收所述第一电压和所述第二电压,并根据所述第一电压和所述第二电压生成伽马电压;
    第三电压产生电路,与所述伽马芯片连接,根据所述伽马电压生成第三电压,所述第三电压产生电路设于所述数据驱动型芯片内;
    所述第一电压、所述第二电压和所述第三电压均为所述数据驱动芯片的工作电压。
  18. 如权利要求17所述的显示面板电源电路,其中,所述第三电压产生电路包括第一电阻、第二电阻、第一开关管和第二开关管,所述第一电阻的第一 端作为所述第三电压产生电路的第一输入端,所述第二电阻的第一端作为所述第三电压产生电路的第二输入端,所述第一电阻的第二端连接所述第二电阻的第二端,所述第一开关管的输入端连接所述电源芯片,所述第二开关管的输入端接地,所述第一开关管的输出端连接所述第二开关管的输出端,所述第一开关管的控制端连接所述第二开关管的控制端,所述第一电阻和所述第二电阻的公共连接端连接所述第一开关管的控制端和所述第二开关管的控制的公共连接端,所述第一开关管的输出端和所述第二开关管的输出端的公共连接端作为所述第三电压产生电路的输出端。
  19. 如权利要求18所述的显示面板电源电路,其中,所述第一开关管为NPN型三极管,所述第二开关管为PNP型三极管。
  20. 如权利要求19所述的显示面板电源电路,其中,所述第三电压产生电路包括第一电阻、第二电阻、第一开关管和第二开关管,所述第一电阻的第一端作为所述第三电压产生电路的第一输入端,所述第二电阻的第一端作为所述第三电压产生电路的第二输入端,所述第一电阻的第二端连接所述第二电阻的第二端,所述第一开关管的输入端连接所述电源芯片,所述第二开关管的输入端接地,所述第一开关管的输出端连接所述第二开关管的输出端,所述第一开关管的控制端连接所述第二开关管的控制端,所述第一电阻和所述第二电阻的公共连接端连接所述第一开关管的控制端和所述第二开关管的控制的公共连接端,所述第一开关管的输出端和所述第二开关管的输出端的公共连接端作为所述第三电压产生电路的输出端。
PCT/CN2018/120807 2018-11-22 2018-12-13 显示装置、显示面板电源系统及其电路 Ceased WO2020103231A1 (zh)

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US20130003230A1 (en) * 2011-06-28 2013-01-03 Rohm Co., Ltd. Power supply system for a display panel
CN203895094U (zh) * 2014-06-13 2014-10-22 昆山龙腾光电有限公司 一种电压产生电路及使用其的驱动系统
CN207833373U (zh) * 2018-03-06 2018-09-07 北京京东方显示技术有限公司 一种电压生成电路、伽马基准电压的生成电路和显示装置
CN108597472A (zh) * 2018-07-18 2018-09-28 惠科股份有限公司 显示装置及其消除关机残影方法

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US20130003230A1 (en) * 2011-06-28 2013-01-03 Rohm Co., Ltd. Power supply system for a display panel
CN203895094U (zh) * 2014-06-13 2014-10-22 昆山龙腾光电有限公司 一种电压产生电路及使用其的驱动系统
CN207833373U (zh) * 2018-03-06 2018-09-07 北京京东方显示技术有限公司 一种电压生成电路、伽马基准电压的生成电路和显示装置
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