WO2022116303A1 - 背光模组及显示装置 - Google Patents

背光模组及显示装置 Download PDF

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Publication number
WO2022116303A1
WO2022116303A1 PCT/CN2020/137974 CN2020137974W WO2022116303A1 WO 2022116303 A1 WO2022116303 A1 WO 2022116303A1 CN 2020137974 W CN2020137974 W CN 2020137974W WO 2022116303 A1 WO2022116303 A1 WO 2022116303A1
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WIPO (PCT)
Prior art keywords
backlight module
interfaces
display device
board
lamp group
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PCT/CN2020/137974
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English (en)
French (fr)
Inventor
方晓莉
吴宇
付玉红
肖光星
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Tcl华星光电技术有限公司
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Priority to US17/263,969 priority Critical patent/US11663985B2/en
Publication of WO2022116303A1 publication Critical patent/WO2022116303A1/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
    • G09G2320/00—Control of display operating conditions
    • G09G2320/06—Adjustment of display parameters
    • G09G2320/0626—Adjustment of display parameters for control of overall brightness
    • G09G2320/0646—Modulation of illumination source brightness and image signal correlated to each other
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2370/00—Aspects of data communication
    • G09G2370/14—Use of low voltage differential signaling [LVDS] for display data communication

Definitions

  • Mini-LED backlight technology has quickly attracted the attention of display panel manufacturers who are developing high-end products due to its excellent performance in contrast and image quality.
  • Mini-LED backlight technology is to evenly distribute multiple LEDs in a multi-zone dynamic backlight to achieve a more precise optical layout and more precise backlight control.
  • Embodiments of the present application provide a backlight module and a display device to solve the problem that there is currently no control signal for controlling the luminous brightness of a backlight LED according to a display image output.
  • the present application provides a backlight module, comprising: a lamp group; and a driving board connected to the lamp group, the driving board is used for transmitting a control signal to the lamp group; wherein the driving board includes a plurality of An interface and a driver chip for transmitting control signals based on different transmission protocols, and the driver chip is used to obtain the control signal for controlling the light group according to a display image, wherein the display image is obtained through an external system board .
  • the backlight module further includes: a plurality of LVDS interfaces disposed on the driving board, and the plurality of LVDS interfaces are used for transmitting low-voltage differential signals.
  • the transmission protocol includes: SPI protocol and VBO protocol.
  • the interfaces include two input interfaces and two output interfaces based on the VBO protocol, and the two input interfaces and the two output interfaces are used to transmit control signals based on the VBO protocol.
  • the interfaces include two input interfaces and two output interfaces based on the SPI protocol, and the two input interfaces and the two output interfaces are used to transmit control signals based on the SPI protocol.
  • the present application also provides a display device including the above-mentioned backlight module.
  • the display device further includes: a display panel, and the display panel is disposed opposite to the lamp group.
  • control signal is used to control the lamp group, and light the corresponding light in the lamp group according to the display image.
  • the display device further includes: a system board for sending the display image to the driver board; a control board for receiving the display image sent from the driver board, and according to the Displaying an image generates the control signal.
  • FIG. 1 is a schematic structural diagram of a backlight module according to an embodiment of the present application.
  • FIG. 2 is a schematic structural diagram of a driving board according to an embodiment of the present application.
  • FIG. 3 is a schematic structural diagram of a display device according to an embodiment of the present application.
  • the backlight module includes: a lamp group 10 and a driving board 20 .
  • the driving board 20 is connected to the light group 10 , and the driving board 20 is used for transmitting the control signal 11 to the light group 10 .
  • the driving board 20 includes a plurality of interfaces and driving chips 29 for transmitting the control signal 11 based on different transmission protocols.
  • the driver chip is used for obtaining the control signal for controlling the lamp group 10 according to a display image, wherein the display image is obtained through an external system board 30 .
  • the transmission protocol includes: Serial Peripheral Interface (SPI for short) protocol and VBO (V-by-one) protocol.
  • SPI Serial Peripheral Interface
  • VBO V-by-one
  • the SPI protocol has 4 different modes, and the slave backlight module is configured as one of the modes by default when it leaves the factory, and both parties in the communication must work in the same mode. Therefore, the SPI mode of the backlight module can be configured, and the communication mode of the backlight module can be controlled through CPO (clock polarity) and CPHA (clock phase).
  • the SPI interface 25 includes two input interfaces and two output interfaces based on the SPI protocol, and the two input interfaces and the two output interfaces are used to transmit control signals based on the SPI protocol 11.
  • the VBO interface 24 includes two input interfaces and two output interfaces based on the VBO protocol, and the two input interfaces and the two output interfaces are used to transmit the control signal 11 based on the VBO protocol. Since the driving board 20 is provided with multiple interfaces for transmitting control signals based on different transmission protocols, the compatibility of the entire display device can be improved.
  • the driving board 20 further includes: a plurality of voltage differential signal interfaces 21 , a power interface 22 , a backup interface 28 and a flash interface 27 .
  • the spare interface 28 is 12pin.
  • the multiple Low-Voltage Differential Signaling (LVDS for short) interfaces 21 are used for transmitting low-voltage differential signals.
  • the driving board 20 is provided with four LVDS interfaces.
  • LVDS is a differential signaling technology with low power consumption, low bit error rate, low crosstalk and low radiation, and the transmission rate can reach more than 155Mbps. connection to multipoint.
  • the driving board 20 can implement the following four modes.
  • Mode 1 Receive the VBO signal and the global dimming signal, obtain the VBO signal and the gray-scale data (control signal) of the backlight partition through an algorithm, and output the gray-scale data of the backlight partition through the LVDS interface.
  • Mode 2 Receive VBO signal and display image, global dimming signal and output.
  • Mode 3 Receive the DP (DisplayPort) signal of the computer, obtain VBO and control signal through algorithm processing and output.
  • DP DisplayPort
  • Mode 4 Applied to product display, receiving display images and VBO signals, outputting control signals and outputting them in SPI format.
  • Embodiments of the present application provide a backlight module and a display device.
  • a driver board is used to convert a display image into control information to achieve precise control of the Mini-LED backlight, and the driver board is provided with a plurality of An interface for transmitting control signals to improve the compatibility of the entire display device.
  • the driver board can be continuously updated by using programmable devices to meet the needs of users.
  • FIG. 3 a schematic structural diagram of a display device according to an embodiment of the present application is shown.
  • the display device includes: the backlight module described in the above embodiments, the system board 30 , the control board 40 and the display panel 50 .
  • the display panel 50 is disposed opposite to the lamp group 10 .
  • the control signal is used to control the lamp group 10, and light the corresponding lights in the lamp group 10 according to the display image.
  • the system board 30 is used for sending the display image to the driver board 20 .
  • the control board 40 is used for receiving the display image sent from the driving board 20 and generating the control signal according to the display image.
  • the display device can be any product or component with a display function, such as a mobile phone, a tablet computer, a TV, a monitor, a notebook computer, a digital photo frame, a navigator, etc.
  • a display function such as a mobile phone, a tablet computer, a TV, a monitor, a notebook computer, a digital photo frame, a navigator, etc.
  • Embodiments of the present application provide a backlight module and a display device.
  • a driver board is used to convert a display image into control information to achieve precise control of the Mini-LED backlight, and the driver board is provided with a plurality of An interface for transmitting control signals to improve the compatibility of the entire display device.
  • the driver board can be continuously updated by using programmable devices to meet the needs of users.

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  • Engineering & Computer Science (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)
  • Liquid Crystal Display Device Control (AREA)

Abstract

一种背光模组及显示装置。背光模组包括灯组（10）及驱动板（20），驱动板（20）与灯组（10）连接。驱动板（20）包括多个基于不同传输协议以传输控制信号（11）的接口及驱动芯片（29）。驱动芯片（29）用于根据显示图像获得用以控制灯组（10）的控制信号（11），其中显示图像为通过外部的系统板（30）所获取。通过驱动板（20）实现将显示图像转换成控制信息，实现对Mini-LED背光的精准控制，并且由于驱动板（20）上设置多个基于不同传输协议以传输控制信号（11）的接口，提升整个显示装置的兼容性。

Description

背光模组及显示装置
本申请要求于2020年12月03日提交中国专利局、申请号为202011404442.4、发明名称为“背光模组及显示装置”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
本申请属于显示面板技术领域，尤其涉及一种背光模组及显示装置。
 背景技术
目前Mini-LED因在对比度上的出色表现和画质优势，Mini-LED背光技术迅速吸引了显示面板制造商开发高端产品的研发人的关注。Mini-LED背光技术是在多分区动态背光内均匀分布多颗LED实现更加精密的光学布局，更加精准的背光控制。
然而，目前暂无根据显示图像调节背光每个LED的亮度的控制信号。
 技术问题
本申请实施例提供一种背光模组及显示装置，用以解决目前暂无根据显示图像输出控制背光LED发光亮度的控制信号的问题。
 技术解决方案
本申请提供一种背光模组，包括：一灯组；以及一驱动板，与所述灯组连接，所述驱动板用于向所述灯组传输控制信号；其中所述驱动板包括多个基于不同传输协议以传输控制信号的接口及驱动芯片，所述驱芯片用于根据显示图像获得用以控制所述灯组的所述控制信号，其中显示图像为通过一外部的系统板所获取的。
进一步地，所述背光模组还包括：多个LVDS接口，设置在所述驱动板上，所述多个LVDS接口用于传输低电压差分信号。
进一步地，所述传输协议包括：SPI协议及VBO协议。
进一步地，所述接口包括基于所述VBO协议的两个输入接口和两个输出接口，所述两个输入接口和所述两个输出接口用以传输基于VBO协议的控制信号。
进一步地，所述接口包括基于所述SPI协议的两个输入接口和两个输出接口，所述两个输入接口和所述两个输出接口用以传输基于SPI协议的控制信号。
进一步地，所述背光模组还包括：多个供电接口，用于为所述驱动板提供工作电压。
本申请还提供一种显示装置，包括上述所述的背光模组。
进一步地，所述显示装置还包括：一显示面板，所述显示面板与所述灯组相对设置。
进一步地，所述控制信号用于控制所述灯组，并根据所述显示图像点亮所述灯组中对应的灯光。
进一步地，所述显示装置还包括：一系统板，用以板用于发送所述显示图像至所述驱动板；一控制板，用以接收从驱动板所发送的显示图像，并根据所述显示图像生成所述控制信号。
 有益效果
本申请实施例提供一种背光模组及显示装置，通过驱动板实现将显示图像转换成控制信息，实现对Mini-LED背光的精准控制，并且所述驱动板上设置多个基于不同传输协议以传输控制信号的接口，提升整个显示装置的兼容性。此外，驱动板通过采用可编程器件而能够不断的更新，从而满足用户的需求。
 附图说明
为了更清楚地说明本申请实施例中的技术方案，下面将对实施例描述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他的附图。
图1为本申请一实施例提供的一种背光模组结构示意图。
图2为本申请一实施例提供的一种驱动板结构示意图。
图3为本申请一实施例提供的一种显示装置结构示意图。
 本发明的实施方式
下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚、完整地描述。显然，所描述的实施例仅仅是本申请一部分实施例，而不是全部的实施例。基于本申请中的实施例，本领域技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。
如图1所示，为本申请提供的背光模组结构示意图，所述背光模组包括：一灯组10及一驱动板20。
所述驱动板20与所述灯组10连接，所述驱动板20用于向所述灯组10传输控制信号11。
如图2所示，在本实施例中所述驱动板20包括：多个基于不同传输协议以传输控制信号11的接口及驱动芯片29。
其中所述驱芯片用于根据显示图像获得用以控制所述灯组10的所述控制信号，其中显示图像为通过一外部的系统板30所获取的。
其中所述传输协议包括：串行外设接口(Serial Peripheral Interface，简称SPI)协议及VBO（V-by-one）协议。
需要说明的是，SPI协议有4种不同的模式，从背光模组在出厂时默认配置为其中一种模式，通信双方必须是工作在这种相同的模式下。因此可以对背光模组的SPI模式进行配置，通过CPO（时钟极性）和CPHA（时钟相位）来控制背光模组的通信模式。
VBO协议是一种图像信息传输的数字接口协议标准。采用VBO传输协议的背光模组发送端与接收端的在开机阶段有严格的握手流程,遵循严格的时序控制。
在本实施例中，所述SPI接口25包括基于所述SPI协议的两个输入接口和两个输出接口，所述两个输入接口和所述两个输出接口用以传输基于SPI协议的控制信号11。所述VBO接口24包括基于所述VBO协议的两个输入接口和两个输出接口，所述两个输入接口和所述两个输出接口用以传输基于VBO协议的控制信号11。由于所述驱动板20上设置多个基于不同传输协议以传输控制信号的接口，因此能够提升整个显示装置的兼容性。
驱动板20还包括：多个电压差分信号接口21、电源接口22、备用接口28及flash接口27。其中所述备用接口28为12pin。
多个电压差分信号（Low-Voltage Differential Signaling，简称LVDS）接口21用于传输低电压差分信号。在本实施例中，所述驱动板20上设置有4个LVDS接口。LVDS是一种低功耗、低误码率、低串扰和低辐射的差分信号技术，传输速率可以达到155Mbps以上，LVDS是采用极低的电压摆幅高速差动传输数据，可以实现点对点或一点对多点的连接。
所述驱动板20还包括多个供电接口26。所述供电接口26用于为所述驱动芯片29提供工作电压。
所述驱动板20可以实现以下四种模式。
模式一：接收VBO信号与全局调光信号，经算法得到VBO信号与背光分区灰阶数据（控制信号），背光分区灰阶数据经LVDS接口输出。
模式二：接收VBO信号以及显示图像、全局调光信号并输出。
模式三：接收电脑的DP（DisplayPort）信号，经算法处理得到VBO与控制信号并输出。
模式四：应用于产品展示，接收显示图像和VBO信号，输出控制信号并以SPI格式输出。
本申请实施例提供一种背光模组及显示装置，通过驱动板实现将显示图像转换成控制信息，实现对Mini-LED背光的精准控制，并且所述驱动板上设置多个基于不同传输协议以传输控制信号的接口，提升整个显示装置的兼容性。此外，驱动板通过采用可编程器件而能够不断的更新，从而满足用户的需求。
如图3所示，为本申请实施例提供的显示装置结构示意图。所述显示装置包括：上述实施例中所述的背光模组、系统板30、控制板40及显示面板50。
所述显示面板50与所述灯组10相对设置。所述控制信号用于控制所述灯组10，并根据所述显示图像点亮所述灯组10中对应的灯光。
所述系统板30用以板用于发送所述显示图像至所述驱动板20。所述控制板40用以接收从驱动板20所发送的显示图像，并根据所述显示图像生成所述控制信号。
该显示装置可以为：手机、平板电脑、电视机、显示器、笔记本电脑、数码相框、导航仪等任何具有显示功能的产品或部件当本实施例的显示装置采用上述实施例所述的背光模组时，其显示效果更好。
本申请实施例提供一种背光模组及显示装置，通过驱动板实现将显示图像转换成控制信息，实现对Mini-LED背光的精准控制，并且所述驱动板上设置多个基于不同传输协议以传输控制信号的接口，提升整个显示装置的兼容性。此外，驱动板通过采用可编程器件而能够不断的更新，从而满足用户的需求。
在上述实施例中，对各个实施例的描述都各有侧重，某个实施例中没有详述的部分，可以参见其他实施例的相关描述。
本文中应用了具体个例对本申请的原理及实施方式进行了阐述，以上实施例的说明只是用于帮助理解本申请的方法及其核心思想；同时，对于本领域的技术人员，依据本申请的思想，在具体实施方式及应用范围上均会有改变之处，综上所述，本说明书内容不应理解为对本申请的限制。

Claims (10)

  1. 一种背光模组，其包括：
    一灯组；以及
    一驱动板，与所述灯组连接，所述驱动板用于向所述灯组传输控制信号；其中所述驱动板包括多个基于不同传输协议以传输控制信号的接口及一驱动芯片，所述驱芯片用于根据显示图像获得用以控制所述灯组的所述控制信号，其中显示图像为通过一外部的系统板所获取的。
  2. 根据权利要求1所述的背光模组，其包括：
    多个LVDS接口，设置在所述驱动板上，所述多个LVDS接口用于传输低电压差分信号。
  3. 根据权利要求1所述的背光模组，其中所述传输协议包括：SPI协议及VBO协议。
  4. 根据权利要求3所述的背光模组，其中所述接口包括基于所述VBO协议的两个输入接口和两个输出接口，所述两个输入接口和所述两个输出接口用以传输基于VBO协议的控制信号。
  5. 根据权利要求3所述的背光模组，其中所述接口包括基于所述SPI协议的两个输入接口和两个输出接口，所述两个输入接口和所述两个输出接口用以传输基于SPI协议的控制信号。
  6. 根据权利要求1所述的背光模组，其包括：多个供电接口，用于为所述驱动板提供工作电压。
  7. 一种显示装置，其包括权利要求1所述的背光模组。
  8. 根据权利要求7所述的显示装置，其中所述显示装置还包括：
    一显示面板，所述显示面板与所述灯组相对设置。
  9. 根据权利要求7所述的显示装置，其中所述控制信号用于控制所述灯组，并根据所述显示图像点亮所述灯组中对应的灯光。
  10. 根据权利要求7所述的显示装置，其中所述显示装置还包括：
    一系统板，用以板用于发送所述显示图像至所述驱动板；
    一控制板，用以接收从驱动板所发送的显示图像，并根据所述显示图像生成所述控制信号。
PCT/CN2020/137974 2020-12-03 2020-12-21 背光模组及显示装置 WO2022116303A1 (zh)

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