WO2020118832A1 - 显示装置的背光电路、背光模组及显示装置 - Google Patents

显示装置的背光电路、背光模组及显示装置 Download PDF

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Publication number
WO2020118832A1
WO2020118832A1 PCT/CN2019/071246 CN2019071246W WO2020118832A1 WO 2020118832 A1 WO2020118832 A1 WO 2020118832A1 CN 2019071246 W CN2019071246 W CN 2019071246W WO 2020118832 A1 WO2020118832 A1 WO 2020118832A1
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Prior art keywords
backlight
circuit
light emitting
voltage
main controller
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PCT/CN2019/071246
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English (en)
French (fr)
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周杭
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惠科股份有限公司
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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
    • 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
    • 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
    • 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
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B44/00—Circuit arrangements for operating electroluminescent light sources

Definitions

  • the application relates to a backlight circuit, a backlight module and a display device of a display device.
  • the liquid crystal display device is currently the mainstream product of flat panel display. Since the liquid crystal itself does not emit light, it needs to be matched with a backlight source for display.
  • the backlight operation needs to be controlled by the backlight driving circuit. Specifically, the backlight driving circuit needs to read the driving parameters of the backlight operation from the memory to control the backlight operation.
  • designing an independent memory requires additional printed circuit board resources, resulting in increased hardware costs.
  • a backlight circuit a backlight module, and a display device are provided.
  • a backlight circuit of a display device includes: a light emitting device, a programmable controller and a main controller;
  • the programmable controller is connected to the configured memory of the display device and the main controller, and is set to read the backlight driving data stored in the configured memory of the display device and provide the backlight driving data to the main controller;
  • the light-emitting device is connected to the main controller and is set to provide a light-emitting source; the main controller is set to control the light-emitting brightness of the light-emitting device according to the backlight driving data.
  • the configured memory of the display device includes a timing control memory.
  • the timing control memory includes non-volatile memory.
  • the non-volatile memory includes a charged erasable programmable read-only memory.
  • the light emitting device includes a light emitting diode.
  • the main controller includes a microprocessor.
  • the programmable controller includes a digital-to-analog conversion circuit configured to convert backlight driving data into an analog backlight signal; and a voltage correction circuit configured to provide a backlight calibration voltage to the main controller.
  • the main controller includes a voltage feedback circuit, a voltage comparison circuit and a control circuit;
  • the voltage feedback circuit is connected to the light emitting device and is set to extract the feedback voltage of the light emitting device;
  • the voltage comparison circuit is respectively connected to the voltage feedback circuit and the voltage correction
  • the circuit connection is set to compare the feedback voltage with the backlight calibration voltage;
  • the control circuit is connected to the light emitting device and is set to adjust the current of the light emitting device.
  • control circuit includes a transistor connected in parallel with the light emitting device.
  • the present application provides a backlight module including an optical film and a backlight circuit.
  • the backlight circuit includes a light emitting device, a programmable controller, and a main controller;
  • the programmable controller of the backlight circuit is connected to the configured memory of the display device, and is connected to the main controller of the backlight circuit, and is set to read the backlight driving data stored in the configured memory of the display device and provide the backlight driving data to main controller;
  • the light emitting device of the backlight circuit is connected to the main controller of the backlight circuit and is set to provide a light emitting source; the main controller of the backlight circuit is set to control the light emitting brightness of the light emitting device according to the backlight driving data.
  • the light emitting device of the backlight circuit includes a light emitting diode.
  • the light emitting device of the backlight circuit includes a cold cathode fluorescent tube.
  • the light emitting device of the backlight circuit includes a tungsten filament lamp.
  • the main controller of the backlight circuit includes a microprocessor.
  • the programmable controller of the backlight circuit includes a digital-to-analog conversion circuit configured to convert backlight driving data into an analog backlight signal; and a voltage correction circuit configured to provide a backlight calibration voltage to the main controller.
  • the main controller of the backlight circuit includes a voltage feedback circuit, a voltage comparison circuit, and a control circuit;
  • the voltage feedback circuit is connected to the light emitting device and is configured to extract the feedback voltage of the light emitting device;
  • the voltage comparison circuit is respectively connected to the voltage feedback circuit Connected to the voltage correction circuit and set to compare the feedback voltage with the backlight calibration voltage;
  • the control circuit is connected to the light emitting device and set to adjust the current of the light emitting device.
  • control circuit of the backlight circuit includes a transistor connected in parallel with the light emitting device.
  • the present application also provides a display device including a liquid crystal panel and a backlight module.
  • the backlight module includes: a light emitting device, a programmable controller, and a main controller;
  • the programmable controller is connected to the configured memory of the display device and the main controller, and is set to read the backlight driving data stored in the configured memory of the display device and provide the backlight driving data to the main controller;
  • the light-emitting device is connected to the main controller and is set to provide a light-emitting source; the main controller is set to control the light-emitting brightness of the light-emitting device according to the backlight driving data.
  • the configured memory of the display device includes a non-volatile memory.
  • the programmable controller includes a digital-to-analog conversion circuit configured to convert backlight driving data into an analog backlight signal; and a voltage correction circuit configured to provide a backlight calibration voltage to the main controller;
  • the main controller of the backlight module includes a voltage feedback circuit, a voltage comparison circuit and a control circuit; the voltage feedback circuit is connected to the light emitting device and is set to extract the feedback voltage of the light emitting device; the voltage comparison circuit is connected to the voltage feedback circuit and the voltage correction circuit, It is set to compare the feedback voltage with the backlight calibration voltage; the control circuit is connected to the light emitting device and is set to adjust the current of the light emitting device.
  • the backlight circuit of the display device of the present application by setting the configured memory of the display device to store the backlight driving data, realizes the coexistence and storage of the backlight driving data with other data of the display device in the same memory, thus saving the use of one memory At the same time, it also saves the hardware resources such as the printed circuit board area occupied by the memory, thereby saving costs.
  • FIG. 1 is a schematic diagram of a backlight circuit according to one or more embodiments.
  • FIG. 2 is a schematic diagram of a backlight circuit according to one or more embodiments.
  • FIG. 3 is a schematic diagram of a backlight circuit according to one or more embodiments.
  • the backlight circuit provided by this application can be applied to the field of display technology.
  • the LCD panel itself does not emit light and requires backlight support to display.
  • the backlight operation needs to be controlled by the backlight driving circuit.
  • the backlight driving circuit reads the driving parameters of the backlight operation from the memory to control the backlight operation.
  • the design of the backlight circuit needs to be equipped with an independent memory.
  • the memory is set to store the driving parameters of the backlight. It is also because the independent memory is used, which requires additional consumption of printed circuit board resources, resulting in increased hardware costs.
  • the backlight circuit includes: a light emitting device 1, a programmable controller 2, and a main controller 3.
  • the light emitting device 1 is used to provide a light source;
  • the programmable controller 2 is used to read the backlight driving data stored in the memory 4 and provide the backlight driving data to the main controller 3, wherein the memory 4 is configured by the display device Memory;
  • the main controller 3 is used to control the brightness of the light emitting device 1 according to the backlight driving data.
  • the light emitting device 1 can use a light emitting diode (LED, Light Diode), a cold cathode fluorescent tube, or a tungsten filament bulb, as long as it can emit light and the light emitting device is adjusted by The current can realize its brightness control.
  • a light emitting diode may be used. Since the light emitting diode is a current device, its luminous intensity is positively correlated with the current flowing through. Therefore, the backlight circuit controls the luminous intensity of the light emitting circuit by controlling the current flowing through the light emitting diode.
  • the programmable controller 2 realizes the purpose of backlight control by reading the backlight driving data stored in the memory in advance and inputting it into the backlight circuit.
  • the main controller can select processing devices with processing functions, such as a microprocessor, a single-chip computer or a central processing unit.
  • processing functions such as a microprocessor, a single-chip computer or a central processing unit.
  • the memory is designed separately, which requires additional memory chip and printed circuit board resources, resulting in increased costs. Since a memory is also required in the display device for storing display drive data, the display circuit realizes display drive control by reading the display drive data in the memory 4 configured in the display device.
  • the configured memory 4 of the display device may be a timing control memory for providing timing control, or a memory in the power supply circuit of the display device, etc., as long as it is a memory configured in the display device and capable of storing backlight driving data, can.
  • the memory of the backlight circuit and the configured memory 4 of the display device are designed in common, and the backlight driving data and the display driving design are stored together in one memory, thereby saving one memory, including saving corresponding storage
  • the PCB area involved in the chip and the corresponding circuit part of the design saves costs.
  • the configured memory 4 of the display device is a charged erasable programmable read-only memory (EEPROM, Electrically Erasable, Programmable, Read Only Memory) provided in a TCON (Timing Controller, Timing Controller).
  • EEPROM Electrically Erasable programmable read-only memory
  • TCON Timing Controller
  • the backlight driving data needs to be redesigned and determined for different backlight schemes; on the other hand, in the display circuit, the TCON itself for timing control of the display
  • the PCB design is equipped with corresponding memory. In most cases, after the LCD panel is manufactured, its corresponding display drive data and timing control circuit have been determined, and there is no need to redesign separately. Therefore, in this embodiment, the backlight driving data is stored in the memory on the TCON, saving the area for designing the backlight driving memory PCB.
  • the TCON memory is optional EEPROM.
  • EEPROM electrically erasable read-only memory
  • the TCON memory is optional EEPROM.
  • ROM read-only memory
  • PROM programmable read-only memory
  • EPROM Erasable programmable read-only memory
  • flash memory and other non-volatile memory.
  • this embodiment only introduces the case where the backlight driving data is stored in the EEPROM of the TCON, that is, the backlight circuit and the display circuit of the display device share the EEPROM of the TCON to realize one EEPROM to accomplish two functions.
  • the display driving data can also be stored in the backlight circuit memory, that is, the backlight circuit and the display circuit share the EEPROM of the backlight circuit, and the technical effect of saving one EPPROM can also be achieved.
  • the programmable controller 2 includes a digital-to-analog conversion circuit 21 for converting backlight driving data into an analog backlight signal, and a voltage correction that provides a backlight calibration voltage to the main controller 3 Circuit 22.
  • the programmable controller 2 is provided with a digital-to-analog conversion circuit (DAC, Digital converter), which is respectively connected to the main controller and the configured memory of the display device, and converts the digital backlight drive data in the memory EEPROM into The analog quantity is provided to the main controller 3 to perform light emission control.
  • DAC Digital converter
  • the main controller 3 includes a voltage feedback circuit 31, a voltage comparison circuit 32, and a control circuit 33; the voltage feedback circuit 31 is connected to the light emitting device 1 for extracting the feedback voltage of the light emitting device 1; the voltage comparison circuit 32 They are respectively connected to the voltage feedback circuit 31 and the voltage correction circuit 22 for comparing the feedback voltage with the backlight calibration voltage; the control circuit 33 is connected to the light emitting device 1 for adjusting the current of the light emitting device 1.
  • the main controller 3 optionally adopts a central processing unit or a microprocessor with data processing capabilities.
  • the main controller 3 includes a voltage feedback circuit 31 for providing a feedback voltage of the light emitting device 1, and a feedback voltage and a calibration voltage Do the voltage comparison circuit 32 for comparison.
  • the memory 4 is a memory configured by the display device.
  • the light-emitting device 1 optionally uses a light-emitting diode, and the light-emitting diode is a current device, and its luminous intensity is positively related to the current flowing through. Therefore, the backlight circuit is realized by controlling the current flowing through the light-emitting diode Control the luminous intensity of the luminous circuit.
  • the programmable controller 2 realizes the purpose of backlight control by reading the backlight driving data stored in the memory in advance and inputting it into the backlight circuit.
  • the backlight drive data stored in the memory EEPROM is digitized.
  • the electrical parameters that need to be simulated in the backlight circuit drive the light-emitting device 1 to emit light.
  • the programmable controller 2 is provided with a digital-to-analog conversion circuit to convert the digitized backlight drive data in the memory EEPROM
  • the analog quantity is provided to the main controller 3 to perform light emission control.
  • the main controller 3 includes a voltage feedback circuit 31 for extracting the feedback voltage of the light emitting device 1, a voltage comparison circuit 32 for comparing the feedback voltage with the calibration voltage, and a control circuit 33 for adjusting the current of the light emitting device 1.
  • the light-emitting device 1 includes a plurality of light-emitting diode lamp strings connected in parallel, and one end of each lamp string is connected to the power supply VCC, and the other end is connected to the ground GND through a resistor R.
  • the voltage at the ground terminal is fed back to the voltage comparison circuit 32.
  • the voltage comparison circuit 32 compares the feedback voltage with the calibration voltage, and after obtaining the comparison result, the main controller 3 controls the current flowing in each lamp string according to the comparison result to achieve brightness control.
  • the control circuit 33 includes a regulator tube connected in parallel with the light emitting device 1, and optionally, the regulator tube may be a transistor.
  • the transistor and the LED light string are connected to the ground GND in parallel, and the control end is connected to the adjustment end of the main controller 3. By changing the voltage applied to the control end, the LED light string can be shunted, thereby adjusting the brightness of the light.
  • the present application also provides a backlight module including an optical film and a backlight circuit.
  • the backlight circuit includes a light emitting device, a programmable controller, and a main controller; the programmable controller of the backlight circuit is connected to the configured memory of the display device, and Connected to the main controller of the backlight circuit, set to read the backlight driving data stored in the configured memory of the display device, and provide the backlight driving data to the main controller; the light emitting device of the backlight circuit is connected to the main controller of the backlight circuit , Set to provide a light source; the main controller of the backlight circuit is set to control the light emitting brightness of the light emitting device according to the backlight driving data.
  • the present application also provides a display device including a liquid crystal panel and a backlight circuit.
  • the backlight module includes a light emitting device, a programmable controller, and a main controller; the programmable controller is connected to the configured memory of the display device, and is connected to the main controller Connected, set to read the backlight drive data stored in the configured memory of the display device, and provide the backlight drive data to the main controller; the light emitting device is connected to the main controller, set to provide a light source; the main controller is set to The backlight driving data controls the light emitting brightness of the light emitting device.

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Abstract

一种显示装置的背光电路，包括：发光器件（1）、可编程控制器（2）以及主控制器（3）；可编程控制器（2）与显示装置已配置的存储器（4）连接，以及与主控制器（3）连接，设置为读取显示装置已配置的存储器（4）中存储的背光驱动数据，并将背光驱动数据提供至主控制器（3）；发光器件（1）与主控制器（3）连接，设置为提供发光源；主控制器（3）设置为根据背光驱动数据控制发光器件（1）的发光亮度。

Description

显示装置的背光电路、背光模组及显示装置
本申请要求于2018年12月13日提交中国专利局，申请号为2018220928524，申请名为“显示装置的背光电路及显示装置”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
本申请涉及一种显示装置的背光电路、背光模组及显示装置。
背景技术
这里的陈述仅提供与本申请有关的背景信息，而不必然地构成现有技术。
液晶显示装置是目前平板显示的主流产品，由于液晶本身并不发光，为进行显示，需要与背光源搭配。而背光的工作需要由背光驱动电路来控制，具体地，背光驱动电路需要从存储器读取背光工作的驱动参数，从而控制背光工作。申请人发现，传统的背光电路中，设计独立的存储器需要占用额外的印刷电路板资源，导致硬件成本增加。
申请内容
根据本申请公开的各种实施例，提供一种背光电路、背光模组以及显示装置。
一种显示装置的背光电路，背光电路包括：发光器件、可编程控制器以及主控制器；
可编程控制器与显示装置已配置的存储器连接，以及与主控制器连接， 设置为读取显示装置已配置的存储器中存储的背光驱动数据，并将背光驱动数据提供至主控制器；
发光器件与主控制器连接，设置为提供发光源；主控制器设置为根据背光驱动数据控制发光器件的发光亮度。
在其中一个实施例中，显示装置已配置的存储器包括时序控制存储器。
在其中一个实施例中，时序控制存储器包括非易失性存储器。
在其中一个实施例中，非易失性存储器包括带电可擦可编程只读存储器。
在其中一个实施例中，发光器件包括发光二极管。
在其中一个实施例中，主控制器包括微处理器。
在其中一个实施例中，可编程控制器包括数模转换电路，设置为将背光驱动数据转换成模拟背光信号；以及电压校正电路，设置为向主控制器提供背光校准电压。
在其中一个实施例中，主控制器包括电压反馈电路、电压比较电路以及控制电路；电压反馈电路与发光器件连接，设置为提取发光器件的反馈电压；电压比较电路分别与电压反馈电路和电压校正电路连接，设置为将反馈电压与背光校准电压做比较；控制电路与发光器件连接，设置为调节发光器件的电流。
在其中一个实施例中，控制电路包括与发光器件并联的晶体管。
本申请提供一种背光模组，包括光学膜片和背光电路，背光电路包括发光器件、可编程控制器以及主控制器；
背光电路的可编程控制器与显示装置已配置的存储器连接，以及与背光电路的主控制器连接，设置为读取显示装置已配置的存储器中存储的背光驱动数据，并将背光驱动数据提供至主控制器；
背光电路的发光器件与背光电路的主控制器连接，设置为提供发光源；背光电路的主控制器设置为根据背光驱动数据控制发光器件的发光亮度。
在其中一个实施例中，背光电路的发光器件包括发光二极管。
在其中一个实施例中，背光电路的发光器件包括冷阴极荧光管。
在其中一个实施例中，背光电路的发光器件包括钨丝灯。
在其中一个实施例中，背光电路的主控制器包括微处理器。
在其中一个实施例中，背光电路的可编程控制器包括数模转换电路，设置为将背光驱动数据转换成模拟背光信号；以及电压校正电路，设置为向主控制器提供背光校准电压。
在其中一个实施例中，背光电路的主控制器包括电压反馈电路、电压比较电路以及控制电路；电压反馈电路与发光器件连接，设置为提取发光器件的反馈电压；电压比较电路分别与电压反馈电路和电压校正电路连接，设置为将反馈电压与背光校准电压做比较；控制电路与发光器件连接，设置为调节发光器件的电流。
在其中一个实施例中，背光电路的控制电路包括与发光器件并联的晶体管。
本申请还提供一种显示装置，包括液晶面板和背光模组，背光模组包括：发光器件、可编程控制器以及主控制器；
可编程控制器与显示装置已配置的存储器连接，以及与主控制器连接，设置为读取显示装置已配置的存储器中存储的背光驱动数据，并将背光驱动数据提供至主控制器；
发光器件与主控制器连接，设置为提供发光源；主控制器设置为根据背光驱动数据控制发光器件的发光亮度。
在其中一个实施例中，显示装置已配置的存储器包括非易失性存储器。
在其中一个实施例中，可编程控制器包括数模转换电路，设置为将背光驱动数据转换成模拟背光信号；以及电压校正电路，设置为向主控制器提供背光校准电压；
背光模组的主控制器包括电压反馈电路、电压比较电路以及控制电路；电压反馈电路与发光器件连接，设置为提取发光器件的反馈电压；电压比较电路分别于电压反馈电路和电压校正电路连接，设置为将反馈电压于背光校准电压做比较；控制电路于发光器件连接，设置为调节发光器件的电流。
本申请的显示装置的背光电路，通过将显示装置已配置的存储器设置为存储背光驱动数据，实现将背光驱动数据于显示装置的其他数据共存存储在同一个存储器中，因此节省了一个存储器的使用，同时也节省了存储器占用的印刷电路板面积等硬件资源，从而节省了成本。
本申请的一个或多个实施例的细节在下面的附图和描述中提出。本申请的其它特征和优点将从说明书、附图以及权利要求书变得明显。
附图说明
为了更清楚地说明本申请实施例中的技术方案，下面将对实施例中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本申请的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其它的附图。
图1为根据一个或多个实施例中背光电路的示意图。
图2为根据一个或多个实施例中背光电路的示意图。
图3为根据一个或多个实施例中背光电路的示意图。
具体实施方式
为了使本申请的技术方案及优点更加清楚明白，以下结合附图及实施例，对本申请进行进一步详细说明。应当理解，此处描述的具体实施例仅仅用以解释本申请，并不设置为限定本申请。
本申请提供的背光电路，可以应用于显示技术领域。液晶面板本身并不发光，需要背光支持才能进行显示。而背光的工作需要由背光驱动电路来控制，具体地，背光驱动电路从存储器中读取背光工作的驱动参数，从而控制背光工作。在一些技术中，设计背光电路需要搭配独立的存储器，该存储器设置为存储背光的驱动参数，也正因为搭配了独立的存储器，需要额外占用印刷电路板资源，导致硬件成本增加。
本申请提供一种显示装置的背光电路，如图1所示，背光电路包括：发光器件1、可编程控制器2以及主控制器3。其中发光器件1用于提供发光源；可编程控制器2用于读取存储器4中存储的背光驱动数据，并将背光驱动数据提供至主控制器3，其中，存储器4是显示装置已配置的存储器；主控制器3用于根据背光驱动数据控制发光器件1的发光亮度。其中，在背光驱动设计中，发光器件1可以使用发光二极管(LED，Light Emitting Diode)，也可以使用冷阴极荧光管，还可以是钨丝灯泡，只要能够发光照明即可，而且发光器件通过调节电流可以实现其亮度控制。其中，可选地，可以采用发光二极管，由于发光二极管是电流器件，其发光强度与流过的电流正相关，因此，背光电路通过控制流过发光二极管的电流实现控制发光电路的发光强度。可编程控制器2则是通过读取预先存储在存储器中的背光驱动数据，输入到背光电路中，实现背光控制的目的。主控制器可选用具有处理功能的处 理器件，比如微处理器、单片机或者中央处理器等。传统的背光设计中，存储器是单独设计的，需要占用额外的存储芯片和印刷电路板资源，造成成本的增加。由于在显示装置中也需要存储器用于存储显示驱动数据，显示电路通过读取显示装置已配置的存储器4中的显示驱动数据实现显示驱动控制。显示装置已配置的存储器4，可以是用于提供时序控制的时序控制存储器，也可以是显示装置的供电电路中的存储器等，只要是显示装置中已配置的且能够存储背光驱动数据的存储器即可。在本实施例中，将背光电路的存储器和显示装置已配置的存储器4进行共用设计，将背光驱动数据和显示驱动设计共同存储在一个存储器中，从而节省了一个存储器，包括节省了相应的存储芯片以及设计对应电路部分所涉及PCB面积，节省了成本。
在其中一个实施例中，显示装置已配置的存储器4为设置在TCON(时序控制器，Timing Controller)中的带电可擦可编程只读存储器(EEPROM，Electrically Erasable Programmable read only memory)。其中，由于在背光电路中需要存储器对背光驱动数据进行存储，在针对不同背光方案时需要重新设计和确定背光驱动数据；另一方面，在显示电路中，用于对显示进行时序控制的TCON自身的PCB设计就配置有对应存储器，大多数情况下，在液晶面板制作完成后，其对应的显示驱动数据以及时序控制电路就已经确定，并不需要再重新单独设计。因此，在本实施例中，将背光驱动数据存储于TCON上的存储器中，节省了设计背光驱动存储器PCB的面积。
其中，TCON的存储器，可选的为EEPROM，当然，作为更多可选方案，也包括只读存储器(ROM,Read-Only Memory)、可编程只读存储器(PROM，Programmable Read-Only Memory)、可擦写可编程只读存储器(EPROM，Erasable Programmable Read-Only Memory)或者快闪存储器等非易失性存储 器。当然，本实施例只是介绍了将背光驱动数据存储到TCON的EEPROM中的情况，即背光电路和显示装置的显示电路共用TCON的EEPROM，实现一个EEPROM完成两个功能。可选地，也可以将显示驱动数据存储到背光电路存储器中，即背光电路和显示电路共用背光电路的EEPROM，也可以实现节省一个EPPROM的技术效果。
在其中一个实施例中，如图2所示，可编程控制器2包括用于将背光驱动数据转换成模拟背光信号的数模转换电路21，以及向主控制器3提供背光校准电压的电压校正电路22。可编程控制器2设置有数模转换电路(DAC，Digital to analog converter)，数模转换电路分别与主控制器连接以及显示装置已配置的存储器连接，将存储器EEPROM中数字化的背光驱动数据转换成模拟量提供到主控制器3，进行发光控制。
在其中一个实施例中，主控制器3包括电压反馈电路31、电压比较电路32以及控制电路33；电压反馈电路31与发光器件1连接，用于提取发光器件1的反馈电压；电压比较电路32分别与电压反馈电路31和电压校正电路22连接，用于将反馈电压与背光校准电压做比较；控制电路33与发光器件1连接，用于调节发光器件1的电流。主控制器3可选地采用具有数据处理能力的中央处理器或者微处理器，主控制器3包括用于提供发光器件1的反馈电压的电压反馈电路31，以及用于将反馈电压与校准电压做比较的电压比较电路32。存储器4是显示装置已配置的存储器。其中，在主流背光驱动设计中，发光器件1可选地使用发光二极管，而发光二极管是电流器件，其发光强度与流过的电流正相关，因此，背光电路通过控制流过发光二极管的电流实现控制发光电路的发光强度。可编程控制器2则是通过读取预先存储在存储器中的背光驱动数据，输入到背光电路中，实现背光控制的目的。在存储 器EEPROM中存储的背光驱动数据是数字化的，背光电路中需要模拟化的电参数驱动发光器件1发光，可编程控制器2设置有数模转换电路，将存储器EEPROM中数字化的背光驱动数据转换成模拟量提供到主控制器3，进行发光控制。主控制器3包括用于提取发光器件1反馈电压的电压反馈电路31，将反馈电压与校准电压作比较的电压比较电路32，以及用于调节发光器件1的电流的控制电路33。可选地，如图3所示，发光器件1包括若干个并联的发光二极管灯串，每个灯串的一端与电源VCC连接，另一端通过电阻R接地GND，电压反馈电路31将电阻R远地端的电压反馈到电压比较电路32，电压比较电路32将反馈电压和校准电压做比较，得到比较结果后主控制器3根据比较结果控制流过每个灯串中的电流，实现亮度控制。控制电路33包括与发光器件1并联的调节管，可选地，调节管可以是晶体管。晶体管与发光二极管灯串并联接地GND，控制端与主控制器3的调节端连接，通过改变加在控制端上的电压，可以对发光二极管灯串进行分流，从而实现对发光亮度的调节。
本申请还提供一种背光模组，包括光学膜片和背光电路，背光电路包括发光器件、可编程控制器以及主控制器；背光电路的可编程控制器与显示装置已配置的存储器连接，以及与背光电路的主控制器连接，设置为读取显示装置已配置的存储器中存储的背光驱动数据，并将背光驱动数据提供至主控制器；背光电路的发光器件与背光电路的主控制器连接，设置为提供发光源；背光电路的主控制器设置为根据背光驱动数据控制发光器件的发光亮度。
本申请还提供一种显示装置，包括液晶面板和背光电路，背光模组包括发光器件、可编程控制器以及主控制器；可编程控制器与显示装置已配置的存储器连接，以及与主控制器连接，设置为读取显示装置已配置的存储器中存储的背光驱动数据，并将背光驱动数据提供至主控制器；发光器件与主控 制器连接，设置为提供发光源；主控制器设置为根据背光驱动数据控制发光器件的发光亮度。
以上实施例的各技术特征可以进行任意的组合，为使描述简洁，未对上述实施例中的各个技术特征所有可能的组合都进行描述，然而，只要这些技术特征的组合不存在矛盾，都应当认为是本说明书记载的范围。
以上所述实施例仅表达了本申请的几种实施方式，其描述较为具体和详细，但并不能因此而理解为对申请专利范围的限制。应当指出的是，对于本领域的普通技术人员来说，在不脱离本申请构思的前提下，还可以做出若干变形和改进，这些都属于本申请的保护范围。因此，本申请专利的保护范围应以所附权利要求为准。

Claims (20)

  1. 一种显示装置的背光电路，其中，所述背光电路包括：发光器件、可编程控制器以及主控制器；
    所述可编程控制器与显示装置已配置的存储器连接，以及与所述主控制器连接，设置为读取所述显示装置已配置的存储器中存储的背光驱动数据，并将所述背光驱动数据提供至所述主控制器；
    所述发光器件与所述主控制器连接，设置为提供发光源；所述主控制器设置为根据所述背光驱动数据控制所述发光器件的发光亮度。
  2. 根据权利要求1所述一种显示装置的背光电路，其中，所述显示装置已配置的存储器包括时序控制存储器。
  3. 根据权利要求1所述一种显示装置的背光电路，其中，所述时序控制存储器包括非易失性存储器。
  4. 根据权利要求3所述一种显示装置的背光电路，其中，所述非易失性存储器包括带电可擦可编程只读存储器。
  5. 根据权利要求1所述一种显示装置的背光电路，其中，所述发光器件包括发光二极管。
  6. 根据权利要求1所述一种显示装置的背光电路，其中，所述主控制器包括微处理器。
  7. 根据权利要求1所述一种显示装置的背光电路，其中，所述可编程控制器包括数模转换电路，设置为将所述背光驱动数据转换成模拟背光信号；以及电压校正电路，设置为向所述主控制器提供背光校准电压。
  8. 根据权利要求7所述一种显示装置的背光电路，其中，所述主控制器包括电压反馈电路、电压比较电路以及控制电路；所述电压反馈电路与所述 发光器件连接，设置为提取所述发光器件的反馈电压；所述电压比较电路分别与所述电压反馈电路和所述电压校正电路连接，设置为将所述反馈电压与所述背光校准电压做比较；所述控制电路与所述发光器件连接，设置为调节所述发光器件的电流。
  9. 根据权利要求8所述一种显示装置的背光电路，其中，所述控制电路包括与所述发光器件并联的晶体管。
  10. 一种背光模组，包括光学膜片以及背光电路，其中，所述背光电路包括发光器件、可编程控制器以及主控制器；
    所述可编程控制器与显示装置已配置的存储器连接，以及与所述主控制器连接，设置为读取所述显示装置已配置的存储器中存储的背光驱动数据，并将所述背光驱动数据提供至所述主控制器；
    所述发光器件与所述主控制器连接，设置为提供发光源；所述主控制器设置为根据所述背光驱动数据控制所述发光器件的发光亮度。
  11. 根据权利要求10所述的背光模组，其中，所述背光电路的发光器件包括发光二极管。
  12. 根据权利要求10所述的背光模组，其中，所述背光电路的发光器件包括冷阴极荧光管。
  13. 根据权利要求10所述的背光模组，其中，所述背光电路的发光器件包括钨丝灯。
  14. 根据权利要求10所述的背光模组，其中，所述背光电路的主控制器包括微处理器。
  15. 根据权利要求10所述的背光模组，其中，所述背光电路的所述可编程控制器包括数模转换电路，设置为将所述背光驱动数据转换成模拟背光信 号；以及电压校正电路，设置为向所述主控制器提供背光校准电压。
  16. 根据权利要求15所述的背光模组，其中，所述背光电路的所述主控制器包括电压反馈电路、电压比较电路以及控制电路；所述电压反馈电路与所述发光器件连接，设置为提取所述发光器件的反馈电压；所述电压比较电路分别与所述电压反馈电路和所述电压校正电路连接，设置为将所述反馈电压与所述背光校准电压做比较；所述控制电路与所述发光器件连接，设置为调节所述发光器件的电流。
  17. 根据权利要求16所述的背光模组，其中，所述背光电路的所述控制电路包括与所述发光器件并联的晶体管。
  18. 一种显示装置，包括液晶面板和背光模组，其中，所述背光模组包括：发光器件、可编程控制器以及主控制器；
    所述可编程控制器与显示装置已配置的存储器连接，以及与所述主控制器连接，设置为读取所述显示装置已配置的存储器中存储的背光驱动数据，并将所述背光驱动数据提供至所述主控制器；
    所述发光器件与所述主控制器连接，设置为提供发光源；所述主控制器设置为根据所述背光驱动数据控制所述发光器件的发光亮度。
  19. 根据权利要求18所述的显示装置，其中，所述显示装置已配置的存储器包括非易失性存储器。
  20. 根据权利要求18所述的显示装置，其中，所述可编程控制器包括数模转换电路，设置为将所述背光驱动数据转换成模拟背光信号；以及电压校正电路，设置为向所述主控制器提供背光校准电压；
    所述背光模组的主控制器包括电压反馈电路、电压比较电路以及控制电路；所述电压反馈电路与所述发光器件连接，设置为提取所述发光器件的反 馈电压；所述电压比较电路分别于所述电压反馈电路和所述电压校正电路连接，设置为将所述反馈电压于所述背光校准电压做比较；所述控制电路于所述发光器件连接，设置为调节所述发光器件的电流。
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