WO2017152467A1 - 适应不同液晶面板的背光亮度自动调整系统及液晶显示器 - Google Patents

适应不同液晶面板的背光亮度自动调整系统及液晶显示器 Download PDF

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WO2017152467A1
WO2017152467A1 PCT/CN2016/079164 CN2016079164W WO2017152467A1 WO 2017152467 A1 WO2017152467 A1 WO 2017152467A1 CN 2016079164 W CN2016079164 W CN 2016079164W WO 2017152467 A1 WO2017152467 A1 WO 2017152467A1
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Prior art keywords
liquid crystal
microcontroller
crystal panel
timing controller
different
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PCT/CN2016/079164
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English (en)
French (fr)
Inventor
李文东
周丽
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深圳市华星光电技术有限公司
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Priority to US15/039,416 priority Critical patent/US20180122307A1/en
Publication of WO2017152467A1 publication Critical patent/WO2017152467A1/zh

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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
    • G09G3/34—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 by control of light from an independent source
    • G09G3/3406—Control of illumination source
    • 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
    • G09G3/34—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 by control of light from an independent source
    • G09G3/3406—Control of illumination source
    • G09G3/342—Control of illumination source using several illumination sources separately controlled corresponding to different display panel areas, e.g. along one dimension such as lines
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • 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
    • G09G3/34—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 by control of light from an independent source
    • G09G3/36—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 by control of light from an independent source using liquid crystals
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2310/00—Command of the display device
    • G09G2310/06—Details of flat display driving waveforms
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/0233—Improving the luminance or brightness uniformity across the screen
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/06—Adjustment of display parameters
    • G09G2320/0626—Adjustment of display parameters for control of overall brightness
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/08—Arrangements within a display terminal for setting, manually or automatically, display parameters of the display terminal

Definitions

  • the invention relates to the field of liquid crystal display technology, in particular to an automatic brightness adjustment system for backlights and a liquid crystal display adapted to different liquid crystal panels.
  • LCD Liquid Crystal Display
  • PDA personal digital assistant
  • digital camera computer screen or Laptop screens, etc.
  • liquid crystal displays which include a liquid crystal panel and a backlight module.
  • the working principle of the liquid crystal panel is to apply a driving voltage on a Thin Film Transistor Array Substrate (TFT Array Substrate) and a Color Filter (CF) to control the rotation direction of liquid crystal molecules between the two substrates.
  • TFT Array Substrate Thin Film Transistor Array Substrate
  • CF Color Filter
  • the backlight module is divided into a side-in type backlight module and a direct-type backlight module according to different incident positions of the light source.
  • a light source such as a cathode fluorescent lamp (CCFL) or a light emitting diode (LED) is disposed behind the liquid crystal panel, and a surface light source is directly formed and supplied to the liquid crystal panel.
  • the side-lit backlight module has a light bar disposed on the side of the liquid crystal panel as a backlight.
  • FIG. 1 is a circuit diagram of a conventional backlight system, including a Microprogrammed Control Unit (MCU) 10' located on a rectifier, and a plurality of LEDs electrically connected to the microcontroller 10'.
  • MCU Microprogrammed Control Unit
  • One end of the LED light bar 20' is connected to the positive potential pin of the microcontroller 10', and the other end is connected to the negative potential pin of the microcontroller 10' via the MOS transistor Q' and the resistor R' connected in series;
  • the gate of the MOS transistor Q' is connected to the brightness control pin C' of the microcontroller 10', and the source and the drain are respectively electrically connected to one end of the LED strip 20' and the resistor R'; the other end of the resistor R' is connected to the micro The negative potential pin of controller 10'.
  • the microcontroller 10' outputs a pulse signal to the gate of the MOS transistor Q' via the brightness control pin C', and controls the degree of switching of the MOS transistor Q' by using the voltage duty ratio of the pulse signal, thereby controlling the flow of the LED lamp.
  • the current of the strip 20' causes the LED strip 20' to exhibit a corresponding brightness. Due to the micro control There is only one program code in the controller 10', and one program code only corresponds to one pulse signal, and only corresponds to a single current flowing through the LED strip 20', and the brightness of the LED strip 20' fixed.
  • the resolution and transmittance of different types of liquid crystal panels are different, so the backlight brightness required by different liquid crystal panels is also different.
  • the backlight system corresponds to a liquid crystal panel with different resolutions and different transmittances, it is necessary to replace the rectifier. Or to write a new program code to the microcontroller, in order to obtain the appropriate optical brightness with different LCD panels, which will undoubtedly increase the cost and make the quality control of the liquid crystal display more complicated.
  • the object of the present invention is to provide an automatic brightness adjustment system for backlights adapted to different liquid crystal panels, which can adjust the brightness of the backlight according to the difference of the liquid crystal panel matched with the backlight, and saves the working time of replacing the rectifier or updating the program code of the microcontroller. And manpower to achieve automation.
  • the object of the present invention is to provide a liquid crystal display, which comprises an automatic brightness adjustment system for backlights adapted to different liquid crystal panels, which can adjust the backlight brightness according to different liquid crystal panels matched with the backlight, and save the program of replacing the rectifier or updating the microcontroller. Automate the coding of man-hours and labor.
  • the present invention firstly provides an automatic brightness adjustment system for a backlight that is adapted to different liquid crystal panels, including: a liquid crystal panel, a timing controller electrically connected to the liquid crystal panel, and a microcontroller electrically connected to the timing controller, a plurality of LED strips electrically connected to the microcontroller, and MOS tubes and resistors connected in series on each of the LED strips;
  • the timing controller performs data interaction with the liquid crystal panel, and the timing controller detects the architecture or resolution information of the liquid crystal panel, and transmits the architecture or resolution information of the liquid crystal panel to the microcontroller in an instruction form.
  • the microcontroller controls the degree of switching of the MOS tube according to different pulse signals of different output duty ratios according to instructions obtained from the timing controller, thereby automatically adjusting the current flowing through the LED strip and the brightness of the LED strip.
  • the preset data table is stored in the microcontroller, and the preset data table defines a correspondence between different instructions transmitted by the timing controller and different program codes in the microcontroller, and one program code corresponds to one type Empty pulse signal.
  • the timing controller detects the architecture or resolution information of the liquid crystal panel according to the scanning time of the liquid crystal panel or the number of data bits transmitted to the liquid crystal panel.
  • Each LED light bar comprises a plurality of light-emitting diodes connected in series, one end of the LED light bar is connected to the positive potential pin of the microcontroller, and the other end is connected to the negative potential of the microcontroller via the MOS tube connected in series with the resistor Pin; the gate of the MOS transistor is connected to the brightness control pin of the microcontroller, the source and the drain are divided Do not electrically connect the LED strip and one end of the resistor; the other end of the resistor is connected to the negative potential pin of the microcontroller; the pulse signal is transmitted to the gate of the MOS transistor via the brightness control pin.
  • the invention also provides a liquid crystal display, comprising a backlight brightness automatic adjustment system adapted to different liquid crystal panels;
  • the backlight brightness automatic adjustment system adapted to different liquid crystal panels comprises: a liquid crystal panel, a timing controller electrically connected with the liquid crystal panel, and a timing controller electrically connected to the microcontroller, a plurality of LED strips electrically connected to the microcontroller, and a MOS tube and a resistor connected in series on each of the LED strips;
  • the timing controller performs data interaction with the liquid crystal panel, and the timing controller detects the architecture or resolution information of the liquid crystal panel, and transmits the architecture or resolution information of the liquid crystal panel to the microcontroller in an instruction form.
  • the microcontroller controls the degree of switching of the MOS tube according to different pulse signals of different output duty ratios according to instructions obtained from the timing controller, thereby automatically adjusting the current flowing through the LED strip and the brightness of the LED strip.
  • the preset data table is stored in the microcontroller, and the preset data table defines a correspondence between different instructions transmitted by the timing controller and different program codes in the microcontroller, and one program code corresponds to one type Empty pulse signal.
  • the timing controller detects the architecture or resolution information of the liquid crystal panel according to the scanning time of the liquid crystal panel or the number of data bits transmitted to the liquid crystal panel.
  • Each LED light bar comprises a plurality of light-emitting diodes connected in series, one end of the LED light bar is connected to the positive potential pin of the microcontroller, and the other end is connected to the negative potential of the microcontroller via the MOS tube connected in series with the resistor a pin; the gate of the MOS transistor is connected to a brightness control pin of the microcontroller, and the source and the drain are respectively electrically connected to the LED strip and one end of the resistor; and the other end of the resistor is connected to the negative potential pin of the microcontroller.
  • the pulse signal is transmitted to the gate of the MOS transistor via the brightness control pin.
  • the invention also provides a liquid crystal display, comprising a backlight brightness automatic adjustment system adapted to different liquid crystal panels;
  • the backlight brightness automatic adjustment system adapted to different liquid crystal panels comprises: a liquid crystal panel, a timing controller electrically connected with the liquid crystal panel, and a timing controller electrically connected to the microcontroller, a plurality of LED strips electrically connected to the microcontroller, and a MOS tube and a resistor connected in series on each of the LED strips;
  • the timing controller performs data interaction with the liquid crystal panel, and the timing controller detects the architecture or resolution information of the liquid crystal panel, and transmits the architecture or resolution information of the liquid crystal panel to the microcontroller in an instruction form.
  • the microcontroller controls the degree of switching of the MOS tube according to different pulse signals of different output duty ratios according to instructions obtained from the timing controller, thereby automatically adjusting the current flowing through the LED strip and the brightness of the LED strip;
  • the preset data table is stored in the microcontroller, and the preset data table defines a correspondence between different instructions transmitted by the timing controller and different program codes in the microcontroller,
  • the program encodes a pulse signal corresponding to a duty cycle.
  • the invention has the beneficial effects that the backlight brightness automatic adjustment system and the liquid crystal display provided by the invention are adapted to different liquid crystal panels, and the data is exchanged between the timing controller and the liquid crystal panel, and the timing controller detects the architecture or resolution information of the liquid crystal panel, and Transmitting the architecture or resolution information of the liquid crystal panel to the microcontroller in an instruction form, and the microcontroller controls the MOS tube according to different pulse signals of different output duty ratios according to instructions obtained from the timing controller
  • the degree of switching thereby automatically adjusting the current flowing through the LED strip and the brightness of the LED strip, thereby realizing the adjustment of the backlight brightness according to the difference of the liquid crystal panel matched with the backlight, saving the program code for replacing the rectifier or updating the microcontroller
  • the hours and manpower are automated.
  • FIG. 1 is a circuit diagram of a conventional backlight system
  • FIG. 2 is a schematic circuit diagram of an automatic brightness adjustment system for backlights adapted to different liquid crystal panels according to the present invention.
  • the present invention first provides an automatic brightness adjustment system for a backlight that is adapted to different liquid crystal panels, including: a liquid crystal panel 10 , a timing controller 20 electrically connected to the liquid crystal panel 10 , and an electrical connection with the timing controller 20 .
  • the display panel 10 requires a particular backlight brightness depending on its own architecture or resolution.
  • the timing controller 20 performs data interaction with the liquid crystal panel 10, and the timing controller 20 detects the architecture or resolution information of the liquid crystal panel 10, and generates different one-to-one correspondences with different architectures or resolution information of the liquid crystal panel 10.
  • the instructions are transmitted to the microcontroller 30 in the form of instructions for the architecture or resolution information of the liquid crystal panel 10.
  • the microcontroller 30 controls the degree of switching of the MOS transistor Q according to different pulse signals of different output duty ratios according to instructions obtained from the timing controller 20, thereby automatically adjusting the current flowing through the LED strip 40 and the LED strip 40. Brightness.
  • the timing controller 20 is based on the scanning time or the liquid crystal to the liquid crystal panel 10
  • the number of data bits transmitted by the panel 10 is used to detect the architecture or resolution information of the liquid crystal panel 10.
  • a preset data table 301 is stored in the microcontroller 30, and the preset data table 301 defines a correspondence between different instructions transmitted by the timing controller 20 and different program codes in the microcontroller 30, the micro
  • the controller 30 determines a program code corresponding to a certain command by the lookup data table 301, and a program code corresponds to a pulse signal of a duty ratio.
  • the timing controller 20 detects the architecture or resolution information of the liquid crystal panel, and generates an instruction corresponding to the architecture or resolution information of the liquid crystal panel, such as liquid crystal panel analysis.
  • the degree is 1920 ⁇ 1080, and the corresponding instruction is 01.
  • the microcontroller 30 After receiving the corresponding instruction 01 transmitted by the timing controller 20, the microcontroller 30 searches the preset data table 301 to obtain a program code corresponding to the instruction 01. Then, according to the program, a pulse signal corresponding to outputting a specific duty ratio is output, and the pulse signal controls the degree of switching of the MOS transistor Q, thereby automatically adjusting the current flowing through the LED light bar 40 and the brightness of the LED light bar 40, so that the LED light The brightness of the strip 40 satisfies the needs of the liquid crystal panel; in the case where the backlight is combined with another liquid crystal panel, the timing controller 20 detects the architecture or resolution information of the other liquid crystal panel, and generates the same with the other Another instruction corresponding to the architecture or resolution information of the liquid crystal panel, such as the resolution of the liquid crystal panel is 3820 ⁇ 2160, and the corresponding instruction is 11, and the microcontroller 30 receives the transmission from the timing controller 20.
  • the preset data table 301 is searched to obtain a program code corresponding to the instruction 11, and then a pulse signal corresponding to another specific duty ratio is output according to the program code, and the pulse signal controls the MOS tube.
  • the degree of switching of Q automatically adjusts the current flowing through the LED strip 40 and the brightness of the LED strip 40 such that the brightness of the LED strip 40 meets the needs of the other liquid crystal panel.
  • each LED light bar 40 includes a plurality of LEDs D connected in series, one end of the LED light bar 40 is connected to the positive potential pin + of the microcontroller 30, and the other end is connected to the MOS transistor Q connected in series.
  • the resistor R is connected to the negative potential pin of the microcontroller 30; the gate of the MOS transistor Q is connected to the brightness control pin C of the microcontroller 30, and the source and the drain are electrically connected to the LED strip 40 and the resistor respectively.
  • One end of R; the other end of the resistor R is connected to the negative potential pin of the microcontroller 30; the pulse signal is transmitted to the gate of the MOS transistor Q via the brightness control pin C.
  • the pulse signal of different duty ratios controls the turn-on and turn-off times of the MOS transistor Q, that is, the degree of switching of the MOS transistor Q is different.
  • the backlight brightness automatic adjustment system of the present invention adapted to different liquid crystal panels does not need to adapt the brightness requirements of different liquid crystal panels to the backlight by replacing the rectifier or updating the program code of the microcontroller as in the prior art, but through the timing controller 20 Detecting the architecture or resolution information of the liquid crystal panel 10, and transmitting the architecture or resolution information of the liquid crystal panel 10 to the microcontroller 30 in an instruction form according to the slave controller 30.
  • the present invention further provides a liquid crystal display including the backlight brightness automatic adjustment system adapted to different liquid crystal panels as shown in FIG. 2, which can adjust backlight brightness according to different liquid crystal panels matched with the backlight, thereby saving Automate the time and labor required to replace the rectifier or update the program code of the microcontroller.
  • the backlight brightness automatic adjustment system adapted to different liquid crystal panels will not be repeatedly described here.
  • the backlight brightness automatic adjustment system and the liquid crystal display of the present invention adapted to different liquid crystal panels, through the timing controller and the liquid crystal panel for data interaction, the timing controller detects the architecture or resolution information of the liquid crystal panel, and The architecture or resolution information of the liquid crystal panel is transmitted to the microcontroller in an instruction form, and the microcontroller controls the degree of switching of the MOS transistor according to different pulse signals of different output duty ratios according to instructions obtained from the timing controller. , thereby automatically adjusting the current flowing through the LED strip and the brightness of the LED strip, thereby realizing the adjustment of the backlight brightness according to the difference of the liquid crystal panel matched with the backlight, saving the man-hours required for replacing the rectifier or updating the program code of the microcontroller. And manpower to achieve automation.

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Abstract

一种适应不同液晶面板的背光亮度自动调整系统及液晶显示器。所述适应不同液晶面板的背光亮度自动调整系统通过时序控制器（20）与液晶面板（10）进行数据交互，时序控制器（20）侦测液晶面板（10）的架构或解析度信息，并将所述液晶面板（10）的架构或解析度信息以指令形式传送给所述微控制器（30），所述微控制器（30）根据从时序控制器（20）得到的指令不同相应输出占空比不同的脉冲信号，控制MOS管（Q）的开关程度，从而自动调节流过LED灯条（40）的电流以及LED灯条（40）的亮度，实现了根据与背光搭配的液晶面板的不同来自行调整背光亮度，节省更换整流器或更新微控制器的程序编码所耗的工时和人力，实现自动化。

Description

适应不同液晶面板的背光亮度自动调整系统及液晶显示器 技术领域
本发明涉及液晶显示技术领域，尤其涉及一种适应不同液晶面板的背光亮度自动调整系统及液晶显示器。
背景技术
液晶显示器(Liquid Crystal Display，LCD)具有机身薄、省电、无辐射等众多优点，得到了广泛的应用，如：液晶电视、移动电话、个人数字助理(PDA)、数字相机、计算机屏幕或笔记本电脑屏幕等。
现有市场上的液晶显示器大部分为背光型液晶显示器，其包括液晶面板及背光模组(Backlight Module)。液晶面板的工作原理是在薄膜晶体管阵列基板(Thin Film Transistor Array Substrate，TFT Array Substrate)与彩色滤光片基板(Color Filter，CF)上施加驱动电压来控制两基板之间液晶分子的旋转方向，以将背光模组的光线折射出来产生画面。
由于液晶面板本身不发光，需要借由背光模组提供的光源来正常显示影像，因此背光模组成为液晶显示器的关键组件之一。背光模组依照光源入射位置的不同分成侧入式背光模组与直下式背光模组两种。直下式背光模组是将发光光源例如阴极萤光灯管(Cold Cathode Fluorescent Lamp，CCFL)或发光二极管(Light Emitting Diode，LED)设置在液晶面板后方，直接形成面光源提供给液晶面板。而侧入式背光模组是将LED灯条(Light bar)设于液晶面板的侧后方作为背光源。
图1所示为一种现有的背光系统的电路示意图，包括位于整流器(Converter)上的微控制器(Microprogrammed Control Unit，MCU)10’、数个电性连接微控制器10’的LED灯条20’、以及每一LED灯条20’上串联的MOS管Q’与电阻R’，每一LED灯条20’包括多个串联的发光二级管D’。所述LED灯条20’的一端接微控制器10’的正电位引脚，另一端经与之串联的MOS管Q’与电阻R’接微控制器10’的负电位引脚；所述MOS管Q’的栅极接微控制器10’的亮度控制引脚C’，源极、漏极分别电性连接LED灯条20’、电阻R’的一端；电阻R’的另一端接微控制器10’的负电位引脚。
所述微控制器10’经亮度控制引脚C’向MOS管Q’的栅极输出脉冲信号，利用脉冲信号的电压占空比来控制MOS管Q’的开关程度，从而控制流过LED灯条20’的电流，使LED灯条20’呈现对应的亮度。由于该微控 制器10’中只有一种程序编码(code)，而一种程序编码只对应一种脉冲信号，也就只能对应单一的流过LED灯条20’的电流，LED灯条20’的亮度固定。
目前，不同型号液晶面板的解析度、透光率等不同，因此不同的液晶面板所需要的背光亮度也不同，当背光系统对应不同解析度、不同透光率的液晶面板时，就必需更换整流器或者向微控制器写入新的程序编码，才能获得与不同液晶面板搭配的适合的光学亮度，这无疑会增加成本，且使得液晶显示器的品质管控更为繁琐。
发明内容
本发明的目的在于提供一种适应不同液晶面板的背光亮度自动调整系统，能够根据与背光搭配的液晶面板的不同来自行调整背光亮度，节省更换整流器或更新微控制器的程序编码所耗的工时和人力，实现自动化。
本发明的目的还在于提供一种液晶显示器，包括适应不同液晶面板的背光亮度自动调整系统，能够根据与背光搭配的液晶面板的不同来自行调整背光亮度，节省更换整流器或更新微控制器的程序编码所耗的工时和人力，实现自动化。
为实现上述目的，本发明首先提供一种适应不同液晶面板的背光亮度自动调整系统，包括：液晶面板、与液晶面板电性连接的时序控制器、与时序控制器电性连接的微控制器、数个电性连接微控制器的LED灯条、以及每一LED灯条上串联的MOS管和电阻；
所述时序控制器与液晶面板进行数据交互，所述时序控制器侦测液晶面板的架构或解析度信息，并将所述液晶面板的架构或解析度信息以指令形式传送给所述微控制器，所述微控制器根据从时序控制器得到的指令不同相应输出占空比不同的脉冲信号，控制MOS管的开关程度，从而自动调节流过LED灯条的电流以及LED灯条的亮度。
所述微控制器内存储有预设的数据表，所述预设的数据表定义出时序控制器传送的不同指令与微控制器内不同程序编码的对应关系，一种程序编码对应一种占空比的脉冲信号。
所述时序控制器根据对液晶面板的扫描时间或向液晶面板传输的数据位数来侦测液晶面板的架构或解析度信息。
每一LED灯条包括多个串联的发光二级管，所述LED灯条的一端接微控制器的正电位引脚，另一端经与之串联的MOS管和电阻接微控制器的负电位引脚；所述MOS管的栅极接微控制器的亮度控制引脚，源极、漏极分 别电性连接LED灯条、电阻的一端；电阻的另一端接微控制器的负电位引脚；所述脉冲信号经亮度控制引脚传输至MOS管的栅极。
本发明还提供一种液晶显示器，包括适应不同液晶面板的背光亮度自动调整系统；所述适应不同液晶面板的背光亮度自动调整系统包括：液晶面板、与液晶面板电性连接的时序控制器、与时序控制器电性连接的微控制器、数个电性连接微控制器的LED灯条、以及每一LED灯条上串联的MOS管和电阻；
所述时序控制器与液晶面板进行数据交互，所述时序控制器侦测液晶面板的架构或解析度信息，并将所述液晶面板的架构或解析度信息以指令形式传送给所述微控制器，所述微控制器根据从时序控制器得到的指令不同相应输出占空比不同的脉冲信号，控制MOS管的开关程度，从而自动调节流过LED灯条的电流以及LED灯条的亮度。
所述微控制器内存储有预设的数据表，所述预设的数据表定义出时序控制器传送的不同指令与微控制器内不同程序编码的对应关系，一种程序编码对应一种占空比的脉冲信号。
所述时序控制器根据对液晶面板的扫描时间或向液晶面板传输的数据位数来侦测液晶面板的架构或解析度信息。
每一LED灯条包括多个串联的发光二级管，所述LED灯条的一端接微控制器的正电位引脚，另一端经与之串联的MOS管和电阻接微控制器的负电位引脚；所述MOS管的栅极接微控制器的亮度控制引脚，源极、漏极分别电性连接LED灯条、电阻的一端；电阻的另一端接微控制器的负电位引脚；所述脉冲信号经亮度控制引脚传输至MOS管的栅极。
本发明还提供一种液晶显示器，包括适应不同液晶面板的背光亮度自动调整系统；所述适应不同液晶面板的背光亮度自动调整系统包括：液晶面板、与液晶面板电性连接的时序控制器、与时序控制器电性连接的微控制器、数个电性连接微控制器的LED灯条、以及每一LED灯条上串联的MOS管和电阻；
所述时序控制器与液晶面板进行数据交互，所述时序控制器侦测液晶面板的架构或解析度信息，并将所述液晶面板的架构或解析度信息以指令形式传送给所述微控制器，所述微控制器根据从时序控制器得到的指令不同相应输出占空比不同的脉冲信号，控制MOS管的开关程度，从而自动调节流过LED灯条的电流以及LED灯条的亮度；
其中，所述微控制器内存储有预设的数据表，所述预设的数据表定义出时序控制器传送的不同指令与微控制器内不同程序编码的对应关系，一 种程序编码对应一种占空比的脉冲信号。
本发明的有益效果：本发明提供的适应不同液晶面板的背光亮度自动调整系统及液晶显示器，通过时序控制器与液晶面板进行数据交互，时序控制器侦测液晶面板的架构或解析度信息，并将所述液晶面板的架构或解析度信息以指令形式传送给所述微控制器，所述微控制器根据从时序控制器得到的指令不同相应输出占空比不同的脉冲信号，控制MOS管的开关程度，从而自动调节流过LED灯条的电流以及LED灯条的亮度，实现了根据与背光搭配的液晶面板的不同来自行调整背光亮度，节省更换整流器或更新微控制器的程序编码所耗的工时和人力，实现自动化。
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为一种现有的背光系统的电路示意图；
图2为本发明的适应不同液晶面板的背光亮度自动调整系统的电路示意图。
具体实施方式
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，本发明首先提供一种适应不同液晶面板的背光亮度自动调整系统，包括：液晶面板10、与液晶面板10电性连接的时序控制器20、与时序控制器20电性连接的微控制器30、数个电性连接微控制器30的LED灯条40、以及每一LED灯条40上串联的MOS管Q和电阻R。
所述显示面板10依据其自身的架构或解析度需要特定的背光亮度。所述时序控制器20与液晶面板10进行数据交互，所述时序控制器20侦测液晶面板10的架构或解析度信息，产生与不同的液晶面板10的架构或解析度信息一一对应的不同指令，并将所述液晶面板10的架构或解析度信息以指令形式传送给所述微控制器30。所述微控制器30根据从时序控制器20得到的指令不同相应输出占空比不同的脉冲信号，控制MOS管Q的开关程度，从而自动调节流过LED灯条40的电流以及LED灯条40的亮度。
具体地，所述时序控制器20根据对液晶面板10的扫描时间或向液晶 面板10传输的数据位数来侦测液晶面板10的架构或解析度信息。
所述微控制器30内存储有预设的数据表301，所述预设的数据表301定义出时序控制器20传送的不同指令与微控制器30内不同程序编码的对应关系，所述微控制器30通过查找数据表301确定与某一指令对应的程序编码，一种程序编码对应一种占空比的脉冲信号。在背光搭配一液晶面板的情况下，时序控制器20侦测所述一液晶面板的架构或解析度信息，并产生与所述一液晶面板的架构或解析度信息对应的指令，如液晶面板解析度为1920×1080，对应的指令为01，微控制器30接收到时序控制器20传送的对应的指令01后，对预设的数据表301进行查找，得到与该指令01对应的程序编码，然后根据该程序编码对应输出一种特定占空比的脉冲信号，该脉冲信号控制MOS管Q的开关程度，从而自动调节流过LED灯条40的电流以及LED灯条40的亮度，使LED灯条40的亮度满足所述一液晶面板的需要；在背光搭配另一液晶面板的情况下，时序控制器20侦测所述另一液晶面板的架构或解析度信息，并产生与所述另一液晶面板的架构或解析度信息对应的另一指令，如液晶面板解析度为3820×2160，对应的指令为11，微控制器30接收到时序控制器20传送的对应的指令11后，对预设的数据表301进行查找，得到与该指令11对应的程序编码，然后根据该程序编码对应输出另一种特定占空比的脉冲信号，该脉冲信号控制MOS管Q的开关程度，从而自动调节流过LED灯条40的电流以及LED灯条40的亮度，使LED灯条40的亮度满足所述另一液晶面板的需要。
进一步地，每一LED灯条40包括多个串联的发光二级管D，所述LED灯条40的一端接微控制器30的正电位引脚+，另一端经与之串联的MOS管Q和电阻R接微控制器30的负电位引脚-；所述MOS管Q的栅极接微控制器30的亮度控制引脚C，源极、漏极分别电性连接LED灯条40、电阻R的一端；电阻R的另一端接微控制器30的负电位引脚-；所述脉冲信号经亮度控制引脚C传输至MOS管Q的栅极。不同占空比的脉冲信号控制MOS管Q的导通与关断时间不同，即MOS管Q的开关程度不同。
本发明的适应不同液晶面板的背光亮度自动调整系统无需像现有技术那样通过更换整流器或更新微控制器的程序编码的形式来适应不同液晶面板对背光的亮度需要，而是通过时序控制器20侦测液晶面板10的架构或解析度信息，将所述液晶面板10的架构或解析度信息以指令形式传送给所述微控制器30，所述微控制器30根据从时序控制器20得到的指令不同相应输出占空比不同的脉冲信号，控制MOS管Q的开关程度，从而自动调节流过LED灯条40的电流以及LED灯条40的亮度，实现了根据与背光搭配 的液晶面板的不同来自行调整背光亮度，节省更换整流器或更新微控制器的程序编码所耗的工时和人力，实现自动化。
基于同一发明构思，本发明还提供一种包括上述如图2所示的适应不同液晶面板的背光亮度自动调整系统的液晶显示器，能够根据与背光搭配的液晶面板的不同来自行调整背光亮度，节省更换整流器或更新微控制器的程序编码所耗的工时和人力，实现自动化。此处不再对该适应不同液晶面板的背光亮度自动调整系统进行重复描述。
综上所述，本发明的适应不同液晶面板的背光亮度自动调整系统及液晶显示器，通过时序控制器与液晶面板进行数据交互，时序控制器侦测液晶面板的架构或解析度信息，并将所述液晶面板的架构或解析度信息以指令形式传送给所述微控制器，所述微控制器根据从时序控制器得到的指令不同相应输出占空比不同的脉冲信号，控制MOS管的开关程度，从而自动调节流过LED灯条的电流以及LED灯条的亮度，实现了根据与背光搭配的液晶面板的不同来自行调整背光亮度，节省更换整流器或更新微控制器的程序编码所耗的工时和人力，实现自动化。
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后附的权利要求的保护范围。

Claims (11)

  1. 一种适应不同液晶面板的背光亮度自动调整系统，包括：液晶面板、与液晶面板电性连接的时序控制器、与时序控制器电性连接的微控制器、数个电性连接微控制器的LED灯条、以及每一LED灯条上串联的MOS管和电阻；
    所述时序控制器与液晶面板进行数据交互，所述时序控制器侦测液晶面板的架构或解析度信息，并将所述液晶面板的架构或解析度信息以指令形式传送给所述微控制器，所述微控制器根据从时序控制器得到的指令不同相应输出占空比不同的脉冲信号，控制MOS管的开关程度，从而自动调节流过LED灯条的电流以及LED灯条的亮度。
  2. 如权利要求1所述的适应不同液晶面板的背光亮度自动调整系统，其中，所述微控制器内存储有预设的数据表，所述预设的数据表定义出时序控制器传送的不同指令与微控制器内不同程序编码的对应关系，一种程序编码对应一种占空比的脉冲信号。
  3. 如权利要求2所述的适应不同液晶面板的背光亮度自动调整系统，其中，所述时序控制器根据对液晶面板的扫描时间或向液晶面板传输的数据位数来侦测液晶面板的架构或解析度信息。
  4. 如权利要求2所述的适应不同液晶面板的背光亮度自动调整系统，其中，每一LED灯条包括多个串联的发光二级管，所述LED灯条的一端接微控制器的正电位引脚，另一端经与之串联的MOS管和电阻接微控制器的负电位引脚；所述MOS管的栅极接微控制器的亮度控制引脚，源极、漏极分别电性连接LED灯条、电阻的一端；电阻的另一端接微控制器的负电位引脚；所述脉冲信号经亮度控制引脚传输至MOS管的栅极。
  5. 一种液晶显示器，包括适应不同液晶面板的背光亮度自动调整系统；所述适应不同液晶面板的背光亮度自动调整系统包括：液晶面板、与液晶面板电性连接的时序控制器、与时序控制器电性连接的微控制器、数个电性连接微控制器的LED灯条、以及每一LED灯条上串联的MOS管和电阻；
    所述时序控制器与液晶面板进行数据交互，所述时序控制器侦测液晶面板的架构或解析度信息，并将所述液晶面板的架构或解析度信息以指令形式传送给所述微控制器，所述微控制器根据从时序控制器得到的指令不同相应输出占空比不同的脉冲信号，控制MOS管的开关程度，从而自动调节流过LED灯条的电流以及LED灯条的亮度。
  6. 如权利要求5所述的液晶显示器，其中，所述微控制器内存储有预设的数据表，所述预设的数据表定义出时序控制器传送的不同指令与微控制器内不同程序编码的对应关系，一种程序编码对应一种占空比的脉冲信号。
  7. 如权利要求6所述的液晶显示器，其中，所述时序控制器根据对液晶面板的扫描时间或向液晶面板传输的数据位数来侦测液晶面板的架构或解析度信息。
  8. 如权利要求6所述的液晶显示器，其中，每一LED灯条包括多个串联的发光二级管，所述LED灯条的一端接微控制器的正电位引脚，另一端经与之串联的MOS管和电阻接微控制器的负电位引脚；所述MOS管的栅极接微控制器的亮度控制引脚，源极、漏极分别电性连接LED灯条、电阻的一端；电阻的另一端接微控制器的负电位引脚；所述脉冲信号经亮度控制引脚传输至MOS管的栅极。
  9. 一种液晶显示器，包括适应不同液晶面板的背光亮度自动调整系统；所述适应不同液晶面板的背光亮度自动调整系统包括：液晶面板、与液晶面板电性连接的时序控制器、与时序控制器电性连接的微控制器、数个电性连接微控制器的LED灯条、以及每一LED灯条上串联的MOS管和电阻；
    所述时序控制器与液晶面板进行数据交互，所述时序控制器侦测液晶面板的架构或解析度信息，并将所述液晶面板的架构或解析度信息以指令形式传送给所述微控制器，所述微控制器根据从时序控制器得到的指令不同相应输出占空比不同的脉冲信号，控制MOS管的开关程度，从而自动调节流过LED灯条的电流以及LED灯条的亮度；
    其中，所述微控制器内存储有预设的数据表，所述预设的数据表定义出时序控制器传送的不同指令与微控制器内不同程序编码的对应关系，一种程序编码对应一种占空比的脉冲信号。
  10. 如权利要求9所述的液晶显示器，其中，所述时序控制器根据对液晶面板的扫描时间或向液晶面板传输的数据位数来侦测液晶面板的架构或解析度信息。
  11. 如权利要求9所述的液晶显示器，其中，每一LED灯条包括多个串联的发光二级管，所述LED灯条的一端接微控制器的正电位引脚，另一端经与之串联的MOS管和电阻接微控制器的负电位引脚；所述MOS管的栅极接微控制器的亮度控制引脚，源极、漏极分别电性连接LED灯条、电阻的一端；电阻的另一端接微控制器的负电位引脚；所述脉冲信号经亮度控制引脚传输至MOS管的栅极。
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