[go: up one dir, main page]
More Web Proxy on the site http://driver.im/

WO2020113677A1 - 显示面板驱动装置 - Google Patents

显示面板驱动装置 Download PDF

Info

Publication number
WO2020113677A1
WO2020113677A1 PCT/CN2018/121857 CN2018121857W WO2020113677A1 WO 2020113677 A1 WO2020113677 A1 WO 2020113677A1 CN 2018121857 W CN2018121857 W CN 2018121857W WO 2020113677 A1 WO2020113677 A1 WO 2020113677A1
Authority
WO
WIPO (PCT)
Prior art keywords
resistor
electrically connected
power supply
voltage
supply voltage
Prior art date
Application number
PCT/CN2018/121857
Other languages
English (en)
French (fr)
Inventor
肖剑锋
Original Assignee
深圳市华星光电半导体显示技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 深圳市华星光电半导体显示技术有限公司 filed Critical 深圳市华星光电半导体显示技术有限公司
Publication of WO2020113677A1 publication Critical patent/WO2020113677A1/zh

Links

Classifications

    • 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
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02MAPPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00Conversion of dc power input into dc power output
    • H02M3/02Conversion of dc power input into dc power output without intermediate conversion into ac
    • H02M3/04Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
    • H02M3/10Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M3/145Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M3/155Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M3/156Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
    • H02M3/158Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load

Definitions

  • the present invention relates to the field of display technology, and in particular to a display panel driving device.
  • LCD liquid crystal displays
  • other flat display devices have been widely used in mobile phones, TVs, and individuals due to their advantages of high image quality, power saving, thin body, and wide application range.
  • Various consumer electronic products such as digital assistants, digital cameras, notebook computers, and desktop computers have become the mainstream in display devices.
  • liquid crystal display devices which include a liquid crystal display panel and a backlight module.
  • the working principle of the liquid crystal display panel is to place liquid crystal molecules in two parallel glass substrates. There are many vertical and horizontal small wires between the two glass substrates.
  • the liquid crystal molecules can be controlled to change the direction by energizing or not, and the light of the backlight module Refracted to produce a picture.
  • the liquid crystal display panel also needs to be driven by an external driving device.
  • the external driving device generally includes: a power supply 100 and a motherboard 200, the power supply 100 is electrically connected to the motherboard 200, and the motherboard 200
  • the display panel 300 is electrically connected.
  • the power supply 100 is generally used to provide a power supply voltage to the motherboard 200.
  • the motherboard 200 is used to provide the display panel 300 with a voltage that drives the display panel 300 to work.
  • the output voltage of the power supply for the liquid crystal display device mainly includes two types of 24V and 12V, and the existing main board generally has a definite working power supply, generally 24V or 12V, that is to say, in a
  • the type of the main board of the liquid crystal display device has also been determined. It must be the same as the working voltage and the output voltage of the power supply to ensure that the main board can work smoothly.
  • the main board of the liquid crystal display device cannot be used with power supplies of different output voltages in the mix and match, and can only match the power supplies of the same specification. The compatibility of the power supplies of different output voltages is not good, resulting in limitations in the application of the main board and cost control Also increased accordingly.
  • the object of the present invention is to provide a display panel driving device, which can expand the application range of the motherboard and reduce the cost of product management and control.
  • the present invention provides a display panel driving device, which includes a power conversion circuit and a motherboard electrically connected to the power conversion circuit;
  • the power conversion circuit includes a detection control module and a first output module and a second output module electrically connected to the detection control module;
  • the detection control module is used to receive a power supply voltage, generate a control signal of a first potential when the voltage value of the power supply voltage is a first voltage value, and generate a difference when the voltage value of the power supply voltage is a second voltage value A control signal of a second potential at a first potential, the first voltage value is greater than the second voltage value;
  • the first output module is used to receive a power supply voltage and a control signal.
  • the control signal is at a first potential
  • the power supply voltage is stepped down, and the stepped-down power supply voltage is output to the main board when the control
  • the signal is the second potential, stop outputting voltage to the motherboard;
  • the second output module is used to receive the power supply voltage and the control signal. When the control signal is at the second potential, the power supply voltage is output to the main board, and when the control signal is at the first potential, the output voltage is stopped to the main board.
  • the detection control module includes: a first resistor, a second resistor, a third resistor, and a first transistor;
  • the first end of the first resistor receives the power supply voltage, and the second end is electrically connected to the first end of the second resistor;
  • the second end of the second resistor is grounded
  • the first end of the third resistor is electrically connected to the first end of the first resistor, and the second end is electrically connected to the collector of the first transistor and outputs a control signal;
  • the base of the first triode is electrically connected to the second end of the first resistor, and the emitter is grounded.
  • the first output module includes: a fourth resistor, a fifth resistor, a first MOS tube and a buck unit;
  • the first end of the fourth resistor receives the power supply voltage, and the second end is electrically connected to the first end of the fifth resistor;
  • the second end of the fifth resistor receives the control signal
  • the gate of the first MOS tube is electrically connected to the first end of the fifth resistor, the source is electrically connected to the first end of the fourth resistor, and the drain is electrically connected to the input end of the step-down unit;
  • the output end of the step-down unit is electrically connected to the main board.
  • the first output module further includes a first capacitor and a second capacitor
  • the first end of the first capacitor is electrically connected to the first end of the fourth resistor, and the second end is grounded;
  • the first end of the second capacitor is electrically connected to the drain of the first MOS tube, and the second end is grounded.
  • the second output module includes: a sixth resistor, a seventh resistor, an eighth resistor, a second MOS tube, a second transistor, a third transistor and a diode;
  • the first end of the sixth resistor receives the power supply voltage, and the second end is electrically connected to the first end of the seventh resistor;
  • the second end of the seventh resistor is electrically connected to the collector of the second triode
  • the first end of the eighth resistor is electrically connected to the first end of the sixth resistor, and the second end is electrically connected to the collector of the third transistor;
  • the gate of the second MOS tube is electrically connected to the first end of the seventh resistor, the source is electrically connected to the first end of the sixth resistor, and the drain is electrically connected to the motherboard;
  • the base of the second triode is electrically connected to the negative electrode of the two electrodes, and the emitter is grounded;
  • the base of the third triode receives the control signal, the positive electrode of the collector electrical two electrode, and the emitter are grounded.
  • the second output module further includes a third capacitor and a fourth capacitor
  • the first end of the third capacitor is electrically connected to the first end of the sixth resistor, and the second end is grounded;
  • the first end of the fourth capacitor is electrically connected to the drain of the second MOS tube, and the second end is grounded.
  • the display panel driving device further includes a power supply electrically connected to the power conversion circuit, and the power supply is used to output a power supply voltage to the power conversion circuit.
  • the step-down processing of the power supply voltage by the first output module specifically includes: stepping down the power supply voltage from a first voltage value to a second voltage value.
  • the first potential is less than the second potential.
  • the first voltage value is 24V
  • the second voltage value is 12V
  • the present invention provides a display panel driving device, which includes a power conversion circuit and a motherboard electrically connected to the power conversion circuit;
  • the power conversion circuit includes a detection control module and a power supply connected to the detection control module
  • the first output module and the second output module can be connected through the detection and control module to identify the voltage value of the power supply voltage, and the first output module or the second output module can be controlled to work according to the different voltage values, so that the voltage input to the motherboard is always Consistent with the working voltage of the motherboard, a motherboard can be used with two different power sources, expanding the application range of the motherboard and reducing the cost of product management.
  • FIG. 1 is a schematic diagram of an existing display panel driving device
  • FIG. 2 is a schematic diagram of a display panel driving device of the present invention
  • FIG. 3 is a circuit diagram of a power conversion module in a display panel driving device of the present invention.
  • the present invention provides a display panel driving device, including a power conversion circuit 1 And power conversion circuit 1 Electrically connected motherboard 2 ;
  • the power conversion circuit 1 Including detection control module 11 And with the detection control module 11 Electrically connected first output module 12 And the second output module 13 ;
  • the detection control module 11 Used to receive power supply voltage Vc , When the supply voltage Vc When the voltage value is the first voltage value, the control signal that generates the first potential Ctr , When the supply voltage Vc When the voltage value is the second voltage value, a control signal of a second potential different from the first potential is generated Ctr , The first voltage value is greater than the second voltage value;
  • the first output module 12 Used to receive power supply voltage Vc And control signals Ctr When the control signal Ctr When it is the first potential, the power supply voltage Vc Perform the step-down process, when the stepped down power supply voltage Vc Output to the motherboard 2 , When the control signal is the second potential, stop outputting the voltage to the motherboard 2 ;
  • the second output module 13 Used to receive power supply voltage Vc And control signals Ctr When the control signal Ctr When it is the second potential, the power supply voltage Vc Output to the motherboard 2 When the control signal Ctr When it is the first potential, stop outputting voltage to the motherboard 2 .
  • the display panel driving device further includes a power conversion circuit 1 Electrically connected power supply 3 , The power supply 3 For converting to the power supply circuit 1 Output power supply voltage Vc .
  • the first output module 11 For power supply voltage Vc The step-down processing is specifically as follows: Vc Step down from the first voltage value to the second voltage value, that is from 24V Lowered to 12V .
  • the first potential is less than the second potential.
  • the detection control module 11 Including: first resistance R1 ⁇ Second resistance R2 , The third resistance R3 First transistor T1 ;
  • the first resistance R1 The first terminal receives the power supply voltage Vc ,
  • the second terminal is electrically connected to the second resistor R2 The first end of the second resistor R2 The second end of the ground;
  • the third resistor R3 The first terminal is electrically connected to the first resistor R1 The first end and the second end are electrically connected to the first transistor T1 Collector and output control signal Ctr ;
  • the first triode T1 The base of the is electrically connected to the first resistor R1 At the second end, the emitter is grounded.
  • the first output module 12 Including: fourth resistance R4 5th resistance R5 ,the first MOS tube Q1 And buck unit J1 ;
  • the fourth resistor R4 The first terminal receives the power supply voltage Vc , The second terminal is electrically connected to the fifth resistor R5 The first end; the fifth resistor R5 The second end of the receiver receives the control signal Ctr ;
  • the first MOS tube Q1 Is electrically connected to the fifth resistor R5 The first end, the source is electrically connected to the fourth resistor R4 The first end of which is electrically connected to the buck unit J1 Input of the; the buck unit J1 The output of the is electrically connected to the motherboard 2 .
  • the first output module 12 also includes the first capacitor C1 And the second capacitor C2 ;
  • the first capacitor C1 The first terminal is electrically connected to the fourth resistor R4 The first end, the second end is grounded; the second capacitor C2 The first end of the is electrically connected to the first MOS tube Q1 , The second terminal is grounded.
  • the first capacitor C1 And the second capacitor C2 Both are filter capacitors.
  • the second output module 13 Including: sixth resistor R6 7th resistance R7 Eighth resistance R8 ,second MOS tube Q2 , The second transistor T2 , The third transistor T3 Diode D1 ;
  • the sixth resistor R6 The first terminal receives the power supply voltage Vc , The second end is electrically connected to the seventh resistor R7 The first end; the seventh resistor R7 The second end is electrically connected to the second transistor T2 Collector; the eighth resistor R8 The first end is electrically connected to the sixth resistor R6 The first end, the second end is electrically connected to the third transistor T3 Collector; the second MOS tube Q2 Is electrically connected to the seventh resistor R7 The first end, the source is electrically connected to the sixth resistor R6 The first end, the drain is electrically connected to the motherboard 2 ;
  • the second transistor T2 The base electrode is electrically connected to the two electrodes D1 The negative electrode, the emitter is grounded; the third transistor T3 The base receives the control signal Ctr , Collector electrode D
  • the second output module 13 also includes a third capacitor C3 And the fourth capacitor C4 ;
  • the third capacitor C3 The first end is electrically connected to the sixth resistor R6 The first end, the second end is grounded; the fourth capacitor C4 The first end is electrically connected to the second MOS tube Q2 , The second terminal is grounded.
  • the third capacitor C3 And the fourth capacitor C4 Both are filter capacitors.
  • the first resistance R1 for twenty four Thousand ohms, second resistance R2 for 1 Thousand ohms, third resistance R3 for 10 Thousand ohms, the first transistor T1 Turn-on voltage Vbe for 0.7V ;
  • the second capacitance is 10 ⁇ F .
  • the first MOS Guan Wei P type MOS tube, P type MOS The gate-source voltage of the tube is turned on when the voltage is negative.
  • the sixth resistor R6 for 10 Thousand ohms seventh resistance R7 for 10 Thousand ohms, eighth resistance R8 for 10 Thousand ohms, the third capacitor C3 for 1 ⁇ F ,
  • the fourth capacitor is 10 ⁇ F
  • the second MOS tube Q2 for P type MOS tube, P type MOS The gate-source voltage of the tube turns on when the voltage is negative D1 Schottky diode.
  • main board of the display panel driving device of the present invention With display panel 4 Electrical connection, used to connect the motherboard 1
  • the working voltage is provided to the display panel 4 To drive the display panel 4 Work, corresponding to the upcoming 12V Voltage input display panel 4 in.
  • the present invention provides a display panel driving device, which includes a power conversion circuit and a motherboard electrically connected to the power conversion circuit; the power conversion circuit includes a detection control module and an electrical connection with the detection control module
  • the connected first output module and second output module can identify the voltage value of the power supply voltage through the detection control module, and control the operation of the first output module or the second output module according to the different voltage values, so that the voltage input to the motherboard is always
  • the working voltage of the main board is consistent, so that one main board can be used with two different power sources, expanding the application range of the main board and reducing the cost of product management.

Landscapes

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

Abstract

一种显示面板驱动装置。显示面板驱动装置包括电源转换电路(1)及与电源转换电路(1)电性连接的主板(2);电源转换电路(1)包括侦测控制模块(11)以及与侦测控制模块(11)电性连接的第一输出模块(12)和第二输出模块(13),通过侦测控制模块(11)识别电源电压(Vc)的电压值,根据电压值的不同控制第一输出模块(12)或第二输出模块(13)工作,使得输入到主板(2)的电压始终与主板(2)的工作电压一致,实现一块主板(2)能够搭配两种不同的电源(3)使用,扩展主板(2)的应用范围,降低产品的管控成本。

Description

显示面板驱动装置 技术领域
本发明涉及显示技术领域,尤其涉及一种显示面板驱动装置。
背景技术
随着显示技术的发展,液晶显示器(Liquid Crystal Display,LCD)等平面显示装置因具有高画质、省电、机身薄及应用范围广等优点,而被广泛的应用于手机、电视、个人数字助理、数字相机、笔记本电脑、台式计算机等各种消费性电子产品,成为显示装置中的主流。
现有市场上的液晶显示装置大部分为背光型液晶显示器,其包括液晶显示面板及背光模组(backlight module)。液晶显示面板的工作原理是在两片平行的玻璃基板当中放置液晶分子,两片玻璃基板中间有许多垂直和水平的细小电线,通过通电与否来控制液晶分子改变方向,将背光模组的光线折射出来产生画面。
通常液晶显示面板还需要通过外部驱动装置进行驱动,如图1所示,所述外部驱动装置一般包括:电源100及主板200,所述电源100与所述主板200电性连接,所述主板200电性连接显示面板300,所述电源100一般用于向主板200提供电源电压,所述主板200用于向显示面板300提供驱动显示面板300工作的电压。
在现有技术中,用于液晶显示装置的电源的输出电压主要包括24V和12V两种类型,而现有的主板一般具有一个确定的工作电源,一般为24V或12V,也就是说,在一个液晶显示装置中,其电源的输出电压确定后,该液晶显示装置的主板的类型也已经确定,必须是工作电压与该电源的输出电压一致的祝爸妈,以保证主板能够顺利工作,在现有技术中,液晶显示装置的主板不可以混搭中不同输出电压的电源使用,只可以匹配同规格的电源,对不同输出电压的电源的兼容性不佳,造成主板的应用存在局限性,管控成本也相应提高。
技术问题
本发明的目的在于提供一种显示面板驱动装置,能够扩展主板的应用范围,降低产品管控成本。
技术解决方案
为实现上述目的,本发明提供了一种显示面板驱动装置,包括电源转换电路及与电源转换电路电性连接的主板;
所述电源转换电路包括侦测控制模块以及与所述侦测控制模块电性连接的第一输出模块和第二输出模块;
所述侦测控制模块用于接收电源电压,当所述电源电压的电压值为第一电压值时产生第一电位的控制信号,当所述电源电压的电压值为第二电压值时产生不同于第一电位的第二电位的控制信号,所述第一电压值大于第二电压值;
所述第一输出模块用于接收电源电压和控制信号,当所述控制信号为第一电位时,对电源电压进行降压处理,并将降压后的电源电压输出至主板,当所述控制信号为第二电位时,停止输出电压至主板;
所述第二输出模块用于接收电源电压和控制信号,当所述控制信号为第二电位时,将电源电压输出至主板,当所述控制信号为第一电位时,停止输出电压至主板。
所述侦测控制模块包括:第一电阻、第二电阻、第三电阻及第一三极管;
所述第一电阻的第一端接收电源电压,第二端电性连接第二电阻的第一端;
所述第二电阻的第二端接地;
所述第三电阻的第一端电性连接第一电阻的第一端,第二端电性连接第一三极管的集电极并输出控制信号;
所述第一三极管的基极电性连接第一电阻的第二端,发射极接地。
所述第一输出模块包括:第四电阻、第五电阻、第一MOS管及降压单元;
所述第四电阻的第一端接收电源电压,第二端电性连接第五电阻的第一端;
所述第五电阻的第二端接收控制信号;
所述第一MOS管的栅极电性连接第五电阻的第一端,源极电性连接第四电阻的第一端,漏极电性连接降压单元的输入端;
所述降压单元的输出端电性连接主板。
所述第一输出模块还包括第一电容及第二电容;
所述第一电容的第一端电性连接第四电阻的第一端,第二端接地;
所述第二电容的第一端电性连接第一MOS管的漏极,第二端接地。
所述第二输出模块包括:第六电阻、第七电阻、第八电阻、第二MOS管、第二三极管、第三三极管及二极管;
所述第六电阻的第一端接收电源电压,第二端电性连接第七电阻的第一端;
所述第七电阻的第二端电性连接第二三极管的集电极;
所述第八电阻的第一端电性连接第六电阻的第一端,第二端电性连接第三三极管的集电极;
所述第二MOS管的栅极电性连接第七电阻的第一端,源极电性连接第六电阻的第一端,漏极电性连接主板;
所述第二三极管的基极电性连接二电极的负极,发射极接地;
所述第三三极管的基极接收控制信号,集电极电性二电极的正极,发射极接地。
所述第二输出模块还包括第三电容及第四电容;
所述第三电容的第一端电性连接第六电阻的第一端,第二端接地;
所述第四电容的第一端电性连接第二MOS管的漏极,第二端接地。
所述显示面板驱动装置还包括与所述电源转换电路电性连接的电源,所述电源用于向所述电源转换电路输出电源电压。
所述第一输出模块对电源电压进行降压处理具体为:将所述电源电压从第一电压值降压至第二电压值。
所述第一电位小于第二电位。
所述第一电压值为24V,第二电压值为12V。
有益效果
本发明的有益效果:本发明提供一种显示面板驱动装置,包括电源转换电路及与电源转换电路电性连接的主板;所述电源转换电路包括侦测控制模块以及与所述侦测控制模块电性连接的第一输出模块和第二输出模块,可通过侦测控制模块识别电源电压的电压值,根据电压值的不同控制第一输出模块或第二输出模块工作,使得输入到主板的电压始终与主板的工作电压一致,实现一块主板能够搭配两种不同的电源使用,扩展主板的应用范围,降低产品的管控成本。
附图说明
为了能更进一步了解本发明的特征以及技术内容,请参阅以下有关本发明的详细说明与附图,然而附图仅提供参考与说明用,并非用来对本发明加以限制。
附图中,
图1为现有的显示面板驱动装置的示意图;
图2为本发明的显示面板驱动装置的示意图;
图3为本发明的显示面板驱动装置中电源转换模块的电路图。
本发明的实施方式
为更进一步阐述本发明所采取的技术手段及其效果,以下结合本发明的优选实施例及其附图进行详细描述。
请参阅图 2 至图 3 ,本发明提供一种显示面板驱动装置,包括电源转换电路 1 及与电源转换电路 1 电性连接的主板 2
所述电源转换电路 1 包括侦测控制模块 11 以及与所述侦测控制模块 11 电性连接的第一输出模块 12 和第二输出模块 13
所述侦测控制模块 11 用于接收电源电压 Vc ,当所述电源电压 Vc 的电压值为第一电压值时产生第一电位的控制信号 Ctr ,当所述电源电压 Vc 的电压值为第二电压值时产生不同于第一电位的第二电位的控制信号 Ctr ,所述第一电压值大于第二电压值;
所述第一输出模块 12 用于接收电源电压 Vc 和控制信号 Ctr ,当所述控制信号 Ctr 为第一电位时,对电源电压 Vc 进行降压处理,当将降压后的电源电压 Vc 输出至主板 2 ,在所述控制信号为第二电位时,停止输出电压至主板 2
所述第二输出模块 13 用于接收电源电压 Vc 和控制信号 Ctr ,当所述控制信号 Ctr 为第二电位时,将电源电压 Vc 输出至主板 2 ,当所述控制信号 Ctr 为第一电位时,停止输出电压至主板 2
此外,如图 2 所示,所述显示面板驱动装置还包括与所述电源转换电路 1 电性连接的电源 3 ,所述电源 3 用于向所述电源转换电路 1 输出电源电压 Vc
具体地,根据所述电源 3 的型号的不同,所述电源 3 输出到所述电源转换电路 1 的电源电压 Vc 可以为 12V 24V
具体地,所述第一输出模块 11 对电源电压 Vc 进行降压处理具体为:将所述电源电压 Vc 从第一电压值降压至第二电压值,也即从 24V 降低至 12V
具体地,所述第一电位小于第二电位。
具体地,在本发明的具体实施例中,所述侦测控制模块 11 包括:第一电阻 R1 、第二电阻 R2 、第三电阻 R3 及第一三极管 T1 ;所述第一电阻 R1 的第一端接收电源电压 Vc ,第二端电性连接第二电阻 R2 的第一端;所述第二电阻 R2 的第二端接地;所述第三电阻 R3 的第一端电性连接第一电阻 R1 的第一端,第二端电性连接第一三极管 T1 的集电极并输出控制信号 Ctr ;所述第一三极管 T1 的基极电性连接第一电阻 R1 的第二端,发射极接地。
具体地,在本发明的具体实施例中,所述第一输出模块 12 包括:第四电阻 R4 、第五电阻 R5 、第一 MOS Q1 及降压单元 J1 ;所述第四电阻 R4 的第一端接收电源电压 Vc ,第二端电性连接第五电阻 R5 的第一端;所述第五电阻 R5 的第二端接收控制信号 Ctr ;所述第一 MOS Q1 的栅极电性连接第五电阻 R5 的第一端,源极电性连接第四电阻 R4 的第一端,漏极电性连接降压单元 J1 的输入端;所述降压单元 J1 的输出端电性连接主板 2
进一步地,在本发明的具体实施例中,所述第一输出模块 12 还包括第一电容 C1 及第二电容 C2 ;所述第一电容 C1 的第一端电性连接第四电阻 R4 的第一端,第二端接地;所述第二电容 C2 的第一端电性连接第一 MOS Q1 的漏极,第二端接地。其中,所述第一电容 C1 及第二电容 C2 均为滤波电容。
具体地,所述第二输出模块 13 包括:第六电阻 R6 、第七电阻 R7 、第八电阻 R8 、第二 MOS Q2 、第二三极管 T2 、第三三极管 T3 及二极管 D1 ;所述第六电阻 R6 的第一端接收电源电压 Vc ,第二端电性连接第七电阻 R7 的第一端;所述第七电阻 R7 的第二端电性连接第二三极管 T2 的集电极;所述第八电阻 R8 的第一端电性连接第六电阻 R6 的第一端,第二端电性接第三三极管 T3 的集电极;所述第二 MOS Q2 的栅极电性连接第七电阻 R7 的第一端,源极电性连接第六电阻 R6 的第一端,漏极电性连接主板 2 ;所述第二三极管 T2 的基极电性连接二电极 D1 的负极,发射极接地;所述第三三极管 T3 的基极接收控制信号 Ctr ,集电极电性二电极 D1 的正极,发射极接地。
进一步地,所述第二输出模块 13 还包括第三电容 C3 及第四电容 C4 ;所述第三电容 C3 的第一端电性连接第六电阻 R6 的第一端,第二端接地;所述第四电容 C4 的第一端电性连接第二 MOS Q2 的漏极,第二端接地。其中,所述第三电容 C3 及第四电容 C4 均为滤波电容。
具体地,在本发明的实施例中,所述第一电阻 R1 24 千欧,第二电阻 R2 1 千欧,第三电阻 R3 10 千欧,所述第一三极管 T1 的导通电压 Vbe 0.7V
如图 3 所示,当电源 3 输出到所述电源转换电路 1 的电源电压 Vc 24V 时,所述第一三极管的基极电压为 0.96V ,所述第一三极管 T1 导通,所述第一三极管 T1 的集电极的电压被拉低至 0 ,也即输出的控制信号 Ctr 的电位 0 ,也即所述第一电位为 0 电位。
如图 3 所示,当电源 3 输出到所述电源转换电路 1 的电源电压 Vc 12V 时,所述第一三极管的基极电压为 0.48V ,所述第一三极管 T1 截止,所述第一三极管 T1 的集电极的电压为 12V ,也即输出的控制信号 Ctr 的电位为 12V ,也即所述第二电位为 12V
进一步地,所述第四电阻 R4 10 千欧,第五电阻 R5 10 千欧,第一电容 C1 1 μ F ,第二电容为 10 μ F ,所述第一 MOS 管为 P MOS 管, P MOS 管的栅源极电压为负压时导通。
如图 3 所示,当电源 3 输出到所述电源转换电路 1 的电源电压 Vc 24V 时,控制信号 Ctr 0 电位,第一 MOS Q1 的栅极电压等于 12V ,第一 MOS 管的栅源极电压为负 12V ,从而第一 MOS 管导通, 24V 的电源电压 Vc 输入到降压单元 J1 中,经过降压单元 J1 的降压至 12V 后,产生 12V 的降压后的电源电压输入到主板 1 中作为主板 1 的工作电压;
如图 3 所示,当电源 3 输出到所述电源转换电路 1 的电源电压 Vc 12V 时,控制信号 Ctr 12V ,第四电阻 R4 和第五电阻 R5 上无电流流过,第一 MOS Q1 的栅极电压等于 12V ,第一 MOS 管的栅源极电压为 0V ,从而第一 MOS Q1 截止, 12V 的电源电压 Vc 无法通过第一 MOS Q1 输入到降压单元 J1 中,降压单元 J1 的输出端无电压输出。
进一步地,所述第六电阻 R6 10 千欧、第七电阻 R7 10 千欧、第八电阻 R8 10 千欧,第三电容 C3 1 μ F ,第四电容为 10 μ F ,所述第二 MOS Q2 P MOS 管, P MOS 管的栅源极电压为负压时导通,二极管 D1 为肖特基二极管。
如图 3 所示,当电源 3 输出到所述电源转换电路 1 的电源电压 Vc 24V 时,控制信号 Ctr 0 电位,第三三极管 T3 导通,第三三极管 T3 的集电极电压为 0V ,二极管 D1 反向偏置截止,第二三极管 T2 截止,第二 MOS Q2 的栅极电压为 24V ,第二 MOS Q2 的栅源极电压为 0 ,第二 MOS Q2 截止, 24V 的电源电压 Vc 无法通过第二 MOS Q2 输入到主板 1 中;
如图 3 所示,当电源 3 输出到所述电源转换电路 1 的电源电压 Vc 12V 时,控制信号 Ctr 12V ,第三三极管 T3 截止,第三三极管 T3 的集电极电压为 12V ,二极管 D1 正向偏置导通,第二三极管 T2 导通,第二 MOS Q2 的栅极电压为 6V ,第二 MOS Q2 的栅源极电压为负 6V ,第二 MOS Q2 导通, 12V 的电源电压 Vc 通过第二 MOS Q2 输入到主板 1 中作为主板 1 的工作电压。
进一步地,本发明的显示面板驱动装置的主板 1 与显示面板 4 电性连接,用于将主板 1 的工作电压提供给显示面板 4 ,以驱动所述显示面板 4 工作,对应上述实施例中即将 12V 的电压输入显示面板 4 中。
综上所述,本发明提供一种显示面板驱动装置,包括电源转换电路及与电源转换电路电性连接的主板;所述电源转换电路包括侦测控制模块以及与所述侦测控制模块电性连接的第一输出模块和第二输出模块,可通过侦测控制模块识别电源电压的电压值,根据电压值的不同控制第一输出模块或第二输出模块工作,使得输入到主板的电压始终与主板的工作电压一致,实现一块主板能够搭配两种不同的电源使用,扩展主板的应用范围,降低产品的管控成本。
以上所述,对于本领域的普通技术人员来说,可以根据本发明的技术方案和技术构思作出其他各种相应的改变和变形,而所有这些改变和变形都应属于本发明权利要求的保护范围。

Claims (10)

  1. 一种显示面板驱动装置,包括电源转换电路及与电源转换电路电性连接的主板;
    所述电源转换电路包括侦测控制模块以及与所述侦测控制模块电性连接的第一输出模块和第二输出模块;
    所述侦测控制模块用于接收电源电压,当所述电源电压的电压值为第一电压值时产生第一电位的控制信号,当所述电源电压的电压值为第二电压值时产生不同于第一电位的第二电位的控制信号,所述第一电压值大于第二电压值;
    所述第一输出模块用于接收电源电压和控制信号,当所述控制信号为第一电位时,对电源电压进行降压处理,并将降压后的电源电压输出至主板,当所述控制信号为第二电位时,停止输出电压至主板;
    所述第二输出模块用于接收电源电压和控制信号,当所述控制信号为第二电位时,将电源电压输出至主板,当所述控制信号为第一电位时,停止输出电压至主板。
  2. 如权利要求1所述的显示面板驱动装置,其中,所述侦测控制模块包括:第一电阻、第二电阻、第三电阻及第一三极管;
    所述第一电阻的第一端接收电源电压,第二端电性连接第二电阻的第一端;
    所述第二电阻的第二端接地;
    所述第三电阻的第一端电性连接第一电阻的第一端,第二端电性连接第一三极管的集电极并输出控制信号;
    所述第一三极管的基极电性连接第一电阻的第二端,发射极接地。
  3. 如权利要求1所述的显示面板驱动装置,其中,所述第一输出模块包括:第四电阻、第五电阻、第一MOS管及降压单元;
    所述第四电阻的第一端接收电源电压,第二端电性连接第五电阻的第一端;
    所述第五电阻的第二端接收控制信号;
    所述第一MOS管的栅极电性连接第五电阻的第一端,源极电性连接第四电阻的第一端,漏极电性连接降压单元的输入端;
    所述降压单元的输出端电性连接主板。
  4. 如权利要求1所述的显示面板驱动装置,其中,所述第一输出模块还包括第一电容及第二电容;
    所述第一电容的第一端电性连接第四电阻的第一端,第二端接地;
    所述第二电容的第一端电性连接第一MOS管的漏极,第二端接地。
  5. 如权利要求1所述的显示面板驱动装置,其中,所述第二输出模块包括:第六电阻、第七电阻、第八电阻、第二MOS管、第二三极管、第三三极管及二极管;
    所述第六电阻的第一端接收电源电压,第二端电性连接第七电阻的第一端;
    所述第七电阻的第二端电性连接第二三极管的集电极;
    所述第八电阻的第一端电性连接第六电阻的第一端,第二端电性连接第三三极管的集电极;
    所述第二MOS管的栅极电性连接第七电阻的第一端,源极电性连接第六电阻的第一端,漏极电性连接主板;
    所述第二三极管的基极电性连接二电极的负极,发射极接地;
    所述第三三极管的基极接收控制信号,集电极电性二电极的正极,发射极接地。
  6. 如权利要求5所述的显示面板驱动装置,其中,所述第二输出模块还包括第三电容及第四电容;
    所述第三电容的第一端电性连接第六电阻的第一端,第二端接地;
    所述第四电容的第一端电性连接第二MOS管的漏极,第二端接地。
  7. 如权利要求1所述的显示面板驱动装置,还包括与所述电源转换电路电性连接的电源,所述电源用于向所述电源转换电路输出电源电压。
  8. 如权利要求1所述的显示面板驱动装置,其中,所述第一输出模块对电源电压进行降压处理具体为:将所述电源电压从第一电压值降压至第二电压值。
  9. 如权利要求1所述的显示面板驱动装置,其中,所述第一电位小于第二电位。
  10. 如权利要求1所述的显示面板驱动装置,其中,所述第一电压值为24V,第二电压值为12V。
PCT/CN2018/121857 2018-12-06 2018-12-18 显示面板驱动装置 WO2020113677A1 (zh)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201811490351.XA CN109410868B (zh) 2018-12-06 2018-12-06 显示面板驱动装置
CN201811490351.X 2018-12-06

Publications (1)

Publication Number Publication Date
WO2020113677A1 true WO2020113677A1 (zh) 2020-06-11

Family

ID=65457721

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2018/121857 WO2020113677A1 (zh) 2018-12-06 2018-12-18 显示面板驱动装置

Country Status (2)

Country Link
CN (1) CN109410868B (zh)
WO (1) WO2020113677A1 (zh)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110635688B (zh) * 2019-09-24 2020-12-08 福州京东方光电科技有限公司 供电电路和显示装置
CN114120927B (zh) * 2021-12-06 2023-03-28 Tcl华星光电技术有限公司 背光模组及显示装置
CN114664269B (zh) * 2022-04-21 2023-07-28 京东方科技集团股份有限公司 工作电源转换电路、显示驱动板及液晶显示屏
CN115080072A (zh) * 2022-07-07 2022-09-20 惠科股份有限公司 驱动电路及存储芯片烧录系统

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20030029736A (ko) * 2001-10-10 2003-04-16 엘지.필립스 엘시디 주식회사 과전압 및 서지전압 방지회로
CN102129281A (zh) * 2010-01-20 2011-07-20 宏碁股份有限公司 动态调整电路及具有动态调整电路的计算机系统
CN102692967A (zh) * 2012-05-14 2012-09-26 江苏中科梦兰电子科技有限公司 一种支持多种电源适配器的计算机主板电路
CN104038207A (zh) * 2014-05-30 2014-09-10 华为技术有限公司 一种切换电路及电子设备
CN206743466U (zh) * 2017-04-14 2017-12-12 深圳创维数字技术有限公司 一种电压自适应供电电路及机顶盒
CN108566082A (zh) * 2018-02-08 2018-09-21 深圳市微电元科技有限公司 一种支持多种输入电压的直流atx电源

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN202306373U (zh) * 2011-09-21 2012-07-04 深圳创维数字技术股份有限公司 直流降压稳压电路
CN103531233B (zh) * 2012-07-03 2018-05-22 深圳市共进电子股份有限公司 用于闪存的掉电保护电路及掉电保护时序电路
TWI513155B (zh) * 2014-03-12 2015-12-11 Sitronix Technology Corp 電源轉換系統
CN205751480U (zh) * 2016-05-19 2016-11-30 合肥惠科金扬科技有限公司 一种显示装置及其电源驱动电路
CN105788556B (zh) * 2016-05-20 2018-12-11 深圳市华星光电技术有限公司 一种过压保护电路及方法、液晶驱动电路
CN105915052B (zh) * 2016-05-26 2018-01-09 深圳市华星光电技术有限公司 直流电压转换电路及液晶显示装置

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20030029736A (ko) * 2001-10-10 2003-04-16 엘지.필립스 엘시디 주식회사 과전압 및 서지전압 방지회로
CN102129281A (zh) * 2010-01-20 2011-07-20 宏碁股份有限公司 动态调整电路及具有动态调整电路的计算机系统
CN102692967A (zh) * 2012-05-14 2012-09-26 江苏中科梦兰电子科技有限公司 一种支持多种电源适配器的计算机主板电路
CN104038207A (zh) * 2014-05-30 2014-09-10 华为技术有限公司 一种切换电路及电子设备
CN206743466U (zh) * 2017-04-14 2017-12-12 深圳创维数字技术有限公司 一种电压自适应供电电路及机顶盒
CN108566082A (zh) * 2018-02-08 2018-09-21 深圳市微电元科技有限公司 一种支持多种输入电压的直流atx电源

Also Published As

Publication number Publication date
CN109410868A (zh) 2019-03-01
CN109410868B (zh) 2020-10-16

Similar Documents

Publication Publication Date Title
WO2020113677A1 (zh) 显示面板驱动装置
WO2019210830A1 (zh) 移位寄存器及其驱动方法、栅极驱动电路和显示装置
WO2018209937A1 (zh) 移位寄存器及其驱动方法、栅极驱动电路、显示装置
CN107342063B (zh) 公共电压驱动电路及显示装置
WO2022089067A1 (zh) 栅极驱动单元、栅极驱动方法,栅极驱动电路和显示装置
CN105427792A (zh) 像素补偿电路及驱动方法、显示面板和显示装置
WO2019015215A1 (zh) 直流电压变换电路及直流电压变换方法和液晶显示装置
TWI549430B (zh) 具有溫度補償之穩壓電路模組
US10074337B2 (en) Chamfering circuit of adjustable chamfered waveform and adjust method of chamfered waveform
WO2020124769A1 (zh) 显示面板驱动电路
WO2019137179A1 (zh) 公共电压生成电路及生成方法、显示装置
CN107527594B (zh) 一种脉冲信号调整电路及液晶显示屏的背光驱动电路
US20200035179A1 (en) Liquid crystal panel including goa circuit and driving method thereof
WO2022166467A1 (zh) 栅极开启电压产生电路、显示面板驱动装置及显示装置
EP3657658A1 (en) Output voltage regulator circuit and liquid crystal display device
CN101567174A (zh) 液晶显示面板和显示装置
KR102229573B1 (ko) 직류 전압 변환 회로, 직류 전압 변환 방법 및 액정 디스플레이 장치
CN107707245A (zh) 电平转移电路、显示装置驱动电路及显示装置
JP2008102297A (ja) 表示装置
US20080042952A1 (en) Power supply circuit of liquid crystal display for reducing residual image
US7791225B2 (en) Power switching circuit and liquid crystal display using same
WO2020124668A1 (zh) 电压调整电路及电压调整方法
WO2014121474A1 (zh) 液晶显示器及其补偿电路、薄膜晶体管的电压的关闭方法
TWI631541B (zh) 高解析顯示器及其驅動晶片
TWI708224B (zh) 顯示面板及其升壓電路

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 18942617

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 18942617

Country of ref document: EP

Kind code of ref document: A1