WO2020056872A1 - 一种背光源的调光控制***、调光控制方法及显示装置 - Google Patents

一种背光源的调光控制***、调光控制方法及显示装置 Download PDF

Info

Publication number
WO2020056872A1
WO2020056872A1 PCT/CN2018/113594 CN2018113594W WO2020056872A1 WO 2020056872 A1 WO2020056872 A1 WO 2020056872A1 CN 2018113594 W CN2018113594 W CN 2018113594W WO 2020056872 A1 WO2020056872 A1 WO 2020056872A1
Authority
WO
WIPO (PCT)
Prior art keywords
backlight
dimming
constant current
data processing
control chip
Prior art date
Application number
PCT/CN2018/113594
Other languages
English (en)
French (fr)
Inventor
巢铁牛
沈思宽
戴奇峰
Original Assignee
深圳创维－Rgb电子有限公司
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 深圳创维－Rgb电子有限公司 filed Critical 深圳创维－Rgb电子有限公司
Publication of WO2020056872A1 publication Critical patent/WO2020056872A1/zh

Links

Images

Classifications

    • 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
    • G09G3/3426—Control of illumination source using several illumination sources separately controlled corresponding to different display panel areas, e.g. along one dimension such as lines the different display panel areas being distributed in two dimensions, e.g. matrix
    • 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
    • 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
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]

Definitions

  • the present disclosure relates to the field of display technology, for example, a dimming control system, a dimming control method, and a display device of a backlight source.
  • MiniLED With the development of technology, a small batch of MiniLED with ultra-small process structure has achieved mass production. Because of its small structure, MiniLED can achieve more partitions. Compared to traditional LCD display technology, MiniLED has more backlight partitions. The TV picture quality is higher, the energy consumption is lower, the picture is more detailed, and the contrast is more obvious.
  • the conventional partitioned localdimming backlight TV uses a single light zone control, that is, one partition requires one control source.
  • the number of backlight partitions is increasing, and the control system will be more and more complicated.
  • the control system is prone to errors and affects the reliability and stability of the product.
  • an object of the present disclosure is to provide a dimming control system, a dimming control method, and a display device for a backlight, which can use a small number of constant current control modules to perform multi-zone control, thereby Double the number of constant current control modules.
  • a backlight dimming control system includes:
  • a main control chip for sending a dimming control signal to the data processing control chip
  • the data processing control chip is used for receiving the dimming control signal of the main control chip and processing it, and then sends it to the constant current control module, and sends the line switching signal of the specific timing to the line scanning unit circuit;
  • Power supply module for powering the main control chip, data processing control chip and backlight LED
  • At least one line scanning unit circuit configured to control the positive electrodes of the backlight LEDs in a plurality of areas to be turned on in a time-sharing manner according to the line switching signals of a specific timing sent by the data processing control chip;
  • At least one constant current control module is configured to divide the backlight LED into a plurality of regions, and control the time-divisional amount of backlight LEDs in multiple regions to be turned off according to the dimming control signal processed by the data processing control chip.
  • the data processing control chip is set with a communication protocol, and the communication protocol is one of an SPI communication protocol, an I2C protocol, a two-wire protocol, or a multi-wire protocol.
  • the line scanning unit circuit includes a plurality of line scan switches, one end of each line scan switch is connected to a power supply module, and the other end of each line scan switch is connected to a backlight LED area. , The control end of each line scan switch is connected to a data processing control chip.
  • the data processing control chip is specifically configured to receive and process the dimming control signals of the main control chip, and generate N line switching signals according to the number of line scanning switches in the line scanning unit circuit. It then sends it to the corresponding line scan switch in the line scan unit circuit, where the timings of any two line switch signals being high-level signals are different, and N represents the number of line scan switches.
  • the sum of the durations of the N high-level signals of the row switch signals is the period of the field synchronization signal of the dimming control signal.
  • the constant current control module includes a constant current control unit and a high-voltage isolating switch control unit, and the high-voltage isolating switch control unit is connected to the negative electrode of the backlight LED in multiple regions and the constant current control.
  • the constant current control unit is also connected to a data processing control chip.
  • the constant current control unit is a constant current control chip.
  • the constant current control unit is configured to divide the backlight LED into several regions, and control the division of the backlight LEDs in multiple regions according to a dimming control signal processed by the data processing control chip. Time out.
  • the high-voltage isolation switch control unit is configured to set a maximum voltage value of the constant current control unit.
  • the backlight LEDs are arranged in a matrix, and each row of backlight LEDs constitutes a backlight LED area.
  • the negative electrodes of the backlight LEDs in the same column are connected and connected to a high-voltage isolation switch control unit.
  • the high-voltage isolation switch control unit includes a MOS tube, a first resistor, and a second resistor, a drain of the MOS tube is connected to a negative electrode of the backlight LED, and a gate of the MOS tube One end of the first resistor and one end of the second resistor, the source of the MOS tube is connected to the constant current control unit, the other end of the first resistor is grounded, and the other end of the second resistor is connected to a DC power source.
  • the MOS tube is an NMOS tube.
  • a voltage value of the DC power source is smaller than a maximum withstand voltage value of the constant current control unit.
  • a dimming control method using a backlight dimming control system as described above includes the following steps:
  • the data processing control chip receives and processes the dimming control signal sent by the main control chip
  • the data processing control chip sends the processed dimming control signal to the constant current control module, and sends a line switch signal of a specific timing to the line scanning unit circuit;
  • the line scanning unit circuit controls the positive polarity of the backlight LEDs in multiple areas to be turned on in a time-sharing manner according to the line switching signals of a specific timing sent by the data processing control chip;
  • the constant current control module divides the backlight LED into several areas, and controls the time division quantity of the backlight LEDs in multiple areas according to the dimming control signal processed by the data processing control chip.
  • a display device includes a dimming control system for a backlight as described above, and the display device performs dimming by using the dimming control method described above.
  • the present invention provides a dimming control system, a dimming control method and a display device for a backlight.
  • the system includes a main control chip, a data processing control chip, a power supply module, at least one line scanning unit circuit, and at least one constant current control module.
  • the data processing control chip sends the processed dimming control signal to the constant current control module, and sends the line switching signal of a specific timing to the line scanning unit circuit, and then the line scanning unit circuit sends the specific
  • the sequential line switching signals control the positive polarity of the backlight LEDs in multiple areas to be turned on in a time-sharing manner.
  • the backlight LED is divided into several areas by the constant current control module, and the multiple areas are controlled according to the dimming control signals processed by the data processing control chip.
  • the time-division of the backlight LED is turned off, so that a constant current channel can be controlled in multiple partitions, a small number of channels can be controlled in multiple partitions, which can achieve the effect of multiple channels and multiple partitions, reduce costs, facilitate control of the dimming system, and increase Increased product reliability and stability.
  • FIG. 1 is a structural block diagram of a dimming control system for a backlight source provided by the present disclosure.
  • FIG. 2 is a schematic diagram of a line scanning unit circuit in a dimming control system of a backlight source provided by the present disclosure.
  • FIG. 3 is a schematic diagram of the high-voltage isolation switch control unit in a dimming control system for a backlight source provided by the present disclosure.
  • FIG. 4 is a timing control diagram of a row scan switch in a dimming control system of a backlight source provided by the present disclosure.
  • FIG. 5 is a flowchart of a backlight dimming control method provided by the present disclosure.
  • the present disclosure provides a dimming control system, a dimming control method, and a display device for a backlight.
  • a backlight dimming control system provided by the present disclosure includes a main control chip 10, a data processing control chip 20, a power supply module 30, at least one line scanning unit circuit 40, and at least one constant current control module. 50.
  • the main control chip 10 is connected to the data processing control chip 20.
  • the data processing control chip 20 is connected to the line scanning unit circuit 40 and the constant current control module 50.
  • the power supply module 30 is connected to the main control chip 10 and data. Process control chip 20.
  • the main control chip 10 is configured to generate a dimming control signal and send it to the data processing control chip 20 to determine the number of partitions; the data processing control chip 20 is configured to receive dimming of the main control chip 10
  • the control signal is processed and sent to the constant current control module 50, and sends a specific timing line switch signal to the line scanning unit circuit 40.
  • the data processing control chip 20 is set with a communication protocol, which can be an SPI communication protocol, an I2C protocol Or a two-wire or multi-wire protocol.
  • the data processing control chip 20 accepts the dimming control signals (including the backlight brightness signal and the zone control signal) sent by the main control chip 10, and after the data processing control chip 20 processes, Sends out control signals to drive and control the line scanning unit circuit 40 and the constant current control module 50; the power supply module 30 is used to supply power to the main control chip 10, the data processing control chip 20 and the backlight LED; The positive electrode of the backlight LEDs in a plurality of areas is switched on in a time-sharing manner according to a row switch signal of a specific timing sent by the data processing control chip 20.
  • the element circuit 40 is connected to a plurality of backlight LED regions, and the row switching signals of the specific timing will cause the positive poles of the respective backlight LED regions to be turned on in a time-sharing manner, thereby achieving the purpose of multi-zone control of a small number of constant current channels;
  • the constant current control module 50 It is used to divide the backlight LED into several areas, and control the time division of the backlight LEDs in multiple areas according to the dimming control signal processed by the data processing control chip 20.
  • the brightness of the LED light is controlled by the dimming control signal, and According to the different on-times of the positive poles of the backlight LEDs in the multiple areas, the constant current control module 50 controls the amount of backlight LEDs in multiple areas to be turned off at different times.
  • the effect of multiple channels and multiple partitions, wherein the number of the constant current control modules 50 may be one or more, and is the same as the number of the line scanning unit circuits 40.
  • the line scanning unit circuit 40 includes a plurality of line scan switches (indicated by SW1, SW2, ..., SWn in FIG. 2), and one end of each line scan switch is connected to a power supply. Module 30. The other end of each line scan switch is connected to the positive pole of a backlight LED area. The control end of each line scan switch is connected to the data processing control chip 20.
  • the line scan unit circuit 40 When the line scan unit circuit 40 is turned on, the power supply voltage provides the LED with a positive pole. Voltage.
  • the constant current control module 50 When the constant current control module 50 is activated, the constant current channel is opened to illuminate the LED lamp, and the brightness of the lamp is controlled by the brightness data signal.
  • each scan switch of the line scan unit circuit 40 is controlled by a line switch signal sent by the data processing control chip 20.
  • the line switch signal controls the conduction of different line scan switches in different periods, so that the backlight in different areas
  • the positive electrode of the LED is turned on at different times, and then the amount of the turned-on backlight LED area is controlled by the constant current control module 50 to control the brightness of the LED light.
  • the data processing control chip 20 is specifically configured to receive and process the dimming control signals of the main control chip 10, and generate N line switch signals according to the number of the line scan switches in the line scan unit circuit 40 and send them to the Corresponding line scan switches in the line scan unit circuit 40, in which the time when any two line switch signals are high-level signals are different, and N represents the number of line scan switches.
  • the sum of the durations of the N high-level signals of the row switching signals is the period of the field synchronization signal of a dimming control signal.
  • the present disclosure adopts a time-division scanning multiplexing method.
  • the time-division scanning multiplexing is to refresh the data multiple times through timing control within a certain period of time, and refresh the data several times with a few scans to achieve a constant
  • the flow control module controls the purpose of multiple partitions. In order to achieve more than one control, it is necessary to connect several scans, that is, the negative ends of several street lights are connected together. If it is designed to be 3 scans, the negative ends of the three rows of LEDs in the first column are connected together, and the positive ends of each zone Controlled by row switch signals.
  • the data processing control chip 20 After the data processing control chip 20 receives the signal from the main control chip 10, the data processing control chip 20 accepts the data, and uses the Vsync (field synchronization signal) time as a reference.
  • Vsync field synchronization signal
  • a Vsync cycle is divided into N parts, starting from the line scan switch SW1, the SW1 switch is turned on, and all the corresponding LED1_1 to LED1_N are connected to the positive pole of the power supply, and then the data that needs to be turned on are turned on according to the data signal.
  • the opening time of SW1 reaches the Vsync / N time, turn off SW1, and then turn on the scan switch SW2.
  • the LED2_1 to LED2_N corresponding to SW2 are connected to the positive pole of the power supply, and then according to the data signal, open the channel that needs to be opened.
  • a round-robin cycle is implemented to realize N-scan multiplexing.
  • the constant current control module 50 includes a constant current control unit 501 and a high-voltage isolating switch control unit 502.
  • the high-voltage isolating switch control unit 502 connects a negative electrode of a backlight LED and a constant-current control unit 501 in multiple regions.
  • the constant current control unit 501 is further connected to a data processing control chip 20.
  • the constant current control unit 501 may be a constant current control chip, which is configured to divide the backlight LED into several regions, and control the backlight LEDs in multiple regions according to a dimming control signal processed by the data processing control chip. Time-division quantity is turned off; the high-voltage isolating switch control unit 502 is used to set the highest voltage value of the constant current control unit 501 to protect the constant current control unit 501 from being damaged by overvoltage.
  • the backlight LEDs are arranged in a matrix type. Each row of backlight LEDs constitutes a backlight LED area.
  • the negative electrodes of the backlight LEDs in the same column are connected and connected to the high-voltage isolating switch control unit 502, so as to achieve the purpose of multiple control.
  • the high-voltage isolation switch control unit 502 includes a MOS tube Q1, a first resistor R1, and a second resistor R2.
  • a drain of the MOS tube Q1 is connected to a negative electrode of a backlight LED, and a gate of the MOS tube Q1.
  • the source of the MOS transistor Q1 is connected to the constant current control unit 501, the other end of the first resistor R1 is grounded, and the other end of the second resistor R2 Connect DC power.
  • the constant current control unit 501 when the constant current control unit 501 is turned on, the voltage here is low.
  • the constant current control unit 501 When the constant current control unit 501 is turned off, the negative terminal voltage of the constant current control unit is the positive terminal voltage of the backlight LED. This voltage As the number of LEDs in series determines the voltage level, the voltage value here continues to rise, and the GS threshold voltage of the MOS tube Q1 continues to decrease until it rises below the GS threshold voltage, and the MOS tube Q1 is turned off, thereby protecting the purpose.
  • the MOS tube is an NMOS tube, and the voltage value of the DC power source is set according to the maximum withstand voltage value of the constant current control unit. The voltage value of the DC power source is selected to be smaller than the maximum withstand voltage value of the constant current control unit.
  • the present disclosure also provides a backlight dimming control method. Please refer to FIG. 5, which includes the following steps:
  • the data processing control chip receives and processes the dimming control signal sent by the main control chip;
  • the data processing control chip sends the processed dimming control signal to the constant current control module, and sends a line switch signal of a specific timing to the line scanning unit circuit;
  • the line scan unit circuit controls the positive polarity of the backlight LEDs in multiple regions to be turned on in a time-sharing manner according to the line switching signals of a specific timing sent by the data processing control chip.
  • the constant current control module divides the backlight LED into a plurality of areas, and controls the time-division of the backlight LEDs in multiple areas according to the dimming control signal processed by the data processing control chip.
  • the positive electrodes of the backlight LEDs in multiple regions are controlled in a time-sharing manner by using a line scanning unit circuit, so that the constant current control module can control the quantity of backlight LEDs in multiple regions in a time-sharing manner, thereby achieving a constant
  • the flow channel controls multiple partitions to achieve the effect of multiple channels and multiple partitions. Since the dimming control system of the backlight has been described in detail above, it will not be repeated here.
  • the present disclosure also correspondingly provides a display device.
  • the display device includes the backlight dimming control system according to the foregoing embodiment.
  • the display device Dimming is performed by using the dimming control method described in the above embodiment.
  • the system includes a main control chip, a data processing control chip, a power supply module, at least one line scanning unit circuit, and At least one constant current control module.
  • the data processing control chip sends the processed dimming control signal to the constant current control module, and sends a row switch signal of a specific timing to the row scanning unit circuit, and then the row scanning unit circuit according to the data
  • the row switch signal of the specific timing sent by the control chip is used to control the positive polarity of the backlight LEDs in multiple regions to be turned on in a time-sharing manner.
  • the backlight LED is divided into several regions by the constant current control module, and the dimming after the chip processing is controlled according to the data processing.
  • the control signal controls the time-division of the backlight LEDs in multiple areas, thereby achieving a constant current channel to control multiple partitions, achieving a small number of channels and multiple partitions, achieving the effect of multiple channels and multiple partitions, reducing costs and facilitating dimming.
  • the control of the system but also increases the reliability and stability of the product.
  • the present invention provides a backlight dimming control system, a dimming control method and a display device.
  • a data processing control chip sends a processed dimming control signal to a constant current control module, and sends a row switch signal of a specific timing to The line scanning unit circuit, and then the line scanning unit circuit controls the positive polarity of the backlight LEDs in multiple areas to be turned on in a time-sharing manner according to the line switching signals of a specific timing, and is controlled by the constant current control module according to the dimming control signal processed by the data processing control chip
  • the backlight LEDs of multiple areas are time-divisioned, so that a constant current channel can be controlled in multiple partitions, a small number of channels can be controlled in multiple partitions, and the effect of multiple channels and multiple partitions can be achieved, which reduces costs and facilitates control of the dimming system. , And increase the reliability and stability of the product.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Liquid Crystal (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Planar Illumination Modules (AREA)

Abstract

一种背光源的调光控制***、调光控制方法及显示装置，***包括主控芯片（10）、数据处理控制芯片（20）、电源供电模块（30）、至少一个行扫描单元电路（40）和至少一个恒流控制模块（50），由数据处理控制芯片（20）发送处理后的调光控制信号至恒流控制模块（50），并发送特定时序的行开关信号至行扫描单元电路（40），然后由行扫描单元电路（40）根据特定时序的行开关信号控制多个区域的背光LED的正极分时导通，由恒流控制模块（50）根据数据处理控制芯片（20）处理后的调光控制信号控制多个区域的背光LED的分时亮灭，从而实现了一个恒流通道控制多个分区，实现少量通道多分区控制，达到多通道多分区的效果，减少了成本，方便对调光***的控制，而且增加了产品的可靠性和稳定性。

Description

一种背光源的调光控制***、调光控制方法及显示装置 技术领域
本公开涉及显示技术领域，例如涉及一种背光源的调光控制***、调光控制方法及显示装置。
背景技术
随着科学技术的日新月异，电视的发展也是突飞猛进，消费者对电视画质的要求越来越苛刻，为满足消费者需求，电视厂家不断的取得技术方面的突破，目前具有HDR功能的电视，无任是在色域，对比度，景深度方面，都能给视觉上带来强烈的震憾感，消费者赞不绝口，为实现完美的HDR功能，针对LED背光源电视，模组的背光分区功不可没，模组的背光分区越多，图像越精细，画质效果越好。
随着技术的发展，一种超小工艺结构的Mini LED已实现小批量量产，Mini LED因结构小，可实现更多分区，相比于传统LCD显示技术，Mini LED更多的背光分区使电视画质精细度更高、能耗更低、画面更细致，对比度越明显。
常规的分区Localdimming背光源电视，采用单个灯区控制，即一个分区需要一路控制源，有多少分区，就需要多少恒流控制模块，背光源分区数量越来越多，控制***会越来越复杂，需要的恒流控制模块也会越来越多，不仅成本高，而且控制***容易出错，影响产品的可靠性和稳定性。
因而现有技术还有待改进和提高。
发明内容
鉴于上述现有技术的不足之处，本公开的目的在于提供一种背光源的调光控制***、调光控制方法及显示装置，可利用少量的恒流控制模块来进行多分区的控制，从而成倍的减少恒流控制模块的数量。
为了达到上述目的，本公开采取了以下技术方案：
一种背光源的调光控制***，包括：
主控芯片，用于向数据处理控制芯片发送调光控制信号；
数据处理控制芯片，用于接收主控芯片的调光控制信号并进行处理后发送至恒流控制模块，并发送特定时序的行开关信号至行扫描单元电路；
电源供电模块，用于给主控芯片、数据处理控制芯片和背光LED供电；
至少一个行扫描单元电路，用于根据数据处理控制芯片发送的特定时序的行开关信号控制多个区域的背光LED的正极分时导通；
至少一个恒流控制模块，用于将背光LED划分为若干个区域，并根据数据处理控制芯片处理后的调光控制信号控制多个区域的背光LED的分时量灭。
所述的背光源的调光控制***中，所述数据处理控制芯片设定有通信协议，所述通信协议为SPI通信协议、I2C协议、两线协议或多线协议中的一种。
所述的背光源的调光控制***中，所述行扫描单元电路包括若干个行扫开关，每个行扫开关的一端连接电源供电模块，每个行扫开关的另一端连接一背光LED区域的正极，每个行扫开关的控制端均连接数据处理控制芯片。
所述的背光源的调光控制***中，所述数据处理控制芯片具体用于接收主控芯片的调光控制信号并处理，并根据行扫描单元电路中行扫开关的数量生成N个行开关信号后将其发送至行扫描单元电路中对应的行扫开关，其中，任意两个行开关信号为高电平信号的时刻均不同，N表示行扫开关的数量。
所述的背光源的调光控制***中，N个所述行开关信号保持高电平信号的持续时间之和为一个调光控制信号的场同步信号的周期。
所述的背光源的调光控制***中，所述恒流控制模块包括恒流控制单元和高压隔离开关控制单元，所述高压隔离开关控制单元连接多个区域的背光LED的负极和恒流控制单元，所述恒流控制单元还连接数据处理控制芯片。
所述的背光源的调光***中，所述恒流控制单元为恒流控制芯片。
所述的背光源的调光***中，所述恒流控制单元用于将背光LED划分为若干个区域，并根据数据处理控制芯片处理后的调光控制信号控制多个区域的背光LED的分时量灭。
所述的背光源的调光***中，所述高压隔离开关控制单元用于设定恒流控制单元的最高电压值。
所述的背光源的调光控制***中，所述背光LED呈矩阵式排列，每一行背光LED组成一背光LED区域，同一列的背光LED的负极相连、并连接高压隔 离开关控制单元。
所述的背光源的调光控制***中，所述高压隔离开关控制单元包括MOS管、第一电阻和第二电阻，所述MOS管的漏极连接背光LED的负极，所述MOS管的栅极连接第一电阻的一端和第二电阻的一端，所述MOS管的源极连接恒流控制单元，所述第一电阻的另一端接地，所述第二电阻的另一端连接直流电源。
所述的背光源的调光控制***中，所述MOS管为NMOS管。
所述的背光源的调光控制***中，所述直流电源的电压值小于所述恒流控制单元的最大耐压值。
一种采用如上所述的背光源的调光控制***的调光控制方法，包括如下步骤：
由数据处理控制芯片接收主控芯片发送的调光控制信号并进行处理；
数据处理控制芯片发送处理后的调光控制信号至恒流控制模块，并发送特定时序的行开关信号至行扫描单元电路；
由行扫描单元电路根据数据处理控制芯片发送的特定时序的行开关信号控制多个区域的背光LED的正极分时导通；
由恒流控制模块将背光LED划分为若干个区域，并根据数据处理控制芯片处理后的调光控制信号控制多个区域的背光LED的分时量灭。
一种显示装置，包括如上所述的背光源的调光控制***，所述显示装置采用如上所述的调光控制方法进行调光。
本公开提供的背光源的调光控制***、调光控制方法及显示装置，所述***包括主控芯片、数据处理控制芯片、电源供电模块、至少一个行扫描单元电路和至少一个恒流控制模块，本公开由数据处理控制芯片发送处理后的调光控制信号至恒流控制模块，并发送特定时序的行开关信号至行扫描单元电路，然后由行扫描单元电路根据数据处理控制芯片发送的特定时序的行开关信号控制多个区域的背光LED的正极分时导通，由恒流控制模块将背光LED划分为若干个区域，并根据数据处理控制芯片处理后的调光控制信号控制多个区域的背光LED的分时量灭，从而实现了一个恒流通道控制多个分区，实现少量通道多分区控制，达到多通道多分区的效果，减少了成本，方便对调光***的控制， 而且增加了产品的可靠性和稳定性。
附图说明
图1为本公开提供的背光源的调光控制***的结构框图。
图2为本公开提供的背光源的调光控制***中，所述行扫描单元电路的原理图。
图3为本公开提供的背光源的调光控制***中，所述高压隔离开关控制单元的原理图。
图4为本公开提供的背光源的调光控制***中，行扫开关的时序控制图。
图5为本公开提供的背光源的调光控制方法的流程图。
具体实施方式
本公开提供一种背光源的调光控制***、调光控制方法及显示装置，为使本公开的目的、技术方案及效果更加清楚、明确，以下参照附图并举实施例对本公开进一步详细说明。应当理解，此处所描述的具体实施例仅用以解释本公开，并不用于限定本公开。
实施例1
请参阅图1，本公开提供的一种背光源的调光控制***，包括主控芯片10、数据处理控制芯片20、电源供电模块30、至少一个行扫描单元电路40和至少一个恒流控制模块50，所述主控芯片10连接所述数据处理控制芯片20，所述数据处理控制芯片20连接行扫描单元电路40和恒流控制模块50，所述电源供电模块30连接主控芯片10和数据处理控制芯片20。
具体来说，所述主控芯片10用于产生调光控制信号并发送至所述数据处理控制芯片20，以确定分区数；所述数据处理控制芯片20用于接收主控芯片10的调光控制信号并进行处理后发送至恒流控制模块50，并发送特定时序的行开关信号至行扫描单元电路40，所述数据处理控制芯片20设定有通信协议，可以是SPI通信协议，I2C协议，或者是两线或多线协议，通过协议，数据处理控制芯片20接受主控芯片10发出来的调光控制信号(包括背光亮度信号与分区控制信号)，经数据处理控制芯片20处理后，发出控制信号去驱动控制行扫 描单元电路40与恒流控制模块50；所述电源供电模块30用于给主控芯片10、数据处理控制芯片20和背光LED供电；所述行扫描单元电路40用于根据数据处理控制芯片20发送的特定时序的行开关信号控制多个区域的背光LED的正极分时导通，所述行扫描单元电路40连接多个背光LED区域，所述特定时序的行开关信号会使各个背光LED区域的正极分时导通，从而实现少量恒流通道多分区控制的目的；所述恒流控制模块50用于将背光LED划分为若干个区域，并根据数据处理控制芯片20处理后的调光控制信号控制多个区域的背光LED的分时量灭，LED灯的亮度受调光控制信号控制，而且根据多个区域的背光LED的正极的导通时刻不同，恒流控制模块50控制多个区域的背光LED的量灭时刻不同，实现了一个恒流控制模块控制多个背光LED区域的目的，达到多通道多分区的效果，其中所述恒流控制模块50的数量可以为一个或多个，且与所述行扫描单元电路40的数量相同。
进一步来说，请参阅图2，所述行扫描单元电路40包括若干个行扫开关(图2中用SW1、SW2......SWn表示)，每个行扫开关的一端连接电源供电模块30，每个行扫开关的另一端连接一背光LED区域的正极，每个行扫开关的控制端均连接数据处理控制芯片20，当行扫描单元电路40开通后，电源供电电压给LED提供正极电压，当恒流控制模块50动作后，开通恒流通道，点亮LED灯，灯的亮度受亮度数据信号控制。
本实施例中，行扫描单元电路40的各个扫描开关受数据处理控制芯片20发送的行开关信号的控制，行开关信号通过在不同时段控制不同的行扫开关的导通，使得不同区域的背光LED的正极在不同时段导通，然后再由恒流控制模块50控制导通的背光LED区域的量灭，并控制LED灯的亮度。
进一步来说，所述数据处理控制芯片20具体用于接收主控芯片10的调光控制信号并处理，并根据行扫描单元电路40中行扫开关的数量生成N个行开关信号后将其发送至行扫描单元电路40中对应的行扫开关，其中，任意两个行开关信号为高电平信号的时刻均不同，N表示行扫开关的数量。
优选的，N个所述行开关信号保持高电平信号的持续时间之和为一个调光控制信号的场同步信号的周期。
具体来说，本公开采用分时扫描复用方法，分时扫描复用就是在一定的时 间周期内，通过时序控制，多次刷新数据，有几扫复用就刷新几次数据，实现一个恒流控制模块控制多个分区的目的。为实现一控多，需将几扫描，即几路灯的负端连接到一起，如设计成3扫时，则将第一列的三区的LED负端连接在一起，每一区的正端分别由行开关信号控制。
举例来说，请一并参阅图3，当数据处理控制芯片20接受到主控芯片10发出来的信号后，数据处理控制芯片20接受数据，以Vsync(场同步信号)时间作为参考，当设计成N扫描时，将一个Vsync周期分解成N等份，依次从行扫开关SW1开始，SW1开关管导通，对应的所有LED1_1至LED1_N与电源正极接通，再根据数据信号，打开需要开通的通道，当SW1开通时间达到Vsync/N时间后，关断SW1，再开通行扫开关SW2，此时SW2所对应的LED2_1至LED2_N接通电源正极，再根据数据信号，打开需要开通的通道，依此类推，直到最后一个行开关SWn开通，周而得始的循环，实现N扫复用。
请继续参阅图1，所述恒流控制模块50包括恒流控制单元501和高压隔离开关控制单元502，所述高压隔离开关控制单元502连接多个区域的背光LED的负极和恒流控制单元501，所述恒流控制单元501还连接数据处理控制芯片20。
具体来说，所述恒流控制单元501可以为恒流控制芯片，用于将背光LED划分为若干个区域，并根据数据处理控制芯片处理后的调光控制信号控制多个区域的背光LED的分时量灭；所述高压隔离开关控制单元502用于设定恒流控制单元501的最高电压值，保护恒流控制单元501不会过压损坏。
优选的，所述背光LED呈矩阵式排列，每一行背光LED组成一背光LED区域，同一列的背光LED的负极相连、并连接高压隔离开关控制单元502，从而可以达到一控多的目的。
请参阅图4，所述高压隔离开关控制单元502包括MOS管Q1、第一电阻R1和第二电阻R2，所述MOS管Q1的漏极连接背光LED的负极，所述MOS管Q1的栅极连接第一电阻R1的一端和第二电阻R2的一端，所述MOS管Q1的源极连接恒流控制单元501，所述第一电阻R1的另一端接地，所述第二电阻R2的另一端连接直流电源。
具体来说，当恒流控制单元501开通后，此处的电压为低电平，当恒流控 制单元501关断时，恒流控制单元的负端电压为背光LED的正端电压，此电压随LED串联个数决定电压高低，此处电压值不断上升，MOS管Q1的GS阈值电压不断下降，直到上升至GS阈值电压以下时，关断MOS管Q1，从而达到保护恒流控制单元501的目的。其中，所述MOS管为NMOS管，所述直流电源的电压值根据恒流控制单元的最大耐压值大小设定，直流电源的电压值的选用小于恒流控制单元的最大耐压值。
实施例2
基于上述背光源的调光控制***，本公开还提供一种背光源的调光控制方法，请参阅图5，包括如下步骤：
S100、由数据处理控制芯片接收主控芯片发送的调光控制信号并进行处理；
S200、数据处理控制芯片发送处理后的调光控制信号至恒流控制模块，并发送特定时序的行开关信号至行扫描单元电路；
S300、由行扫描单元电路根据数据处理控制芯片发送的特定时序的行开关信号控制多个区域的背光LED的正极分时导通；
S400、由恒流控制模块将背光LED划分为若干个区域，并根据数据处理控制芯片处理后的调光控制信号控制多个区域的背光LED的分时量灭。
具体来说，本公开通过利用行扫描单元电路控制多个区域的背光LED的正极分时导通，使得恒流控制模块可以分时控制多个区域的背光LED的量灭，从而达到了一个恒流通道控制多个分区的目的，达到多通道多分区的效果。由于上文已对背光源的调光控制***进行详细描述，在此不再赘述。
实施例3
基于上述背光源的调光控制***和调光控制方法，本公开还相应的提供一种显示装置，所述显示装置包括如上述实施例所述的背光源的调光控制***，所述显示装置采用如上述实施例所述的调光控制方法进行调光。
综上所述，本公开提供的背光源的调光控制***、调光控制方法及显示装置中，所述***包括主控芯片、数据处理控制芯片、电源供电模块、至少一个行扫描单元电路和至少一个恒流控制模块，本公开由数据处理控制芯片发送处理后的调光控制信号至恒流控制模块，并发送特定时序的行开关信号至行扫描单元电路，然后由行扫描单元电路根据数据处理控制芯片发送的特定时序的行 开关信号控制多个区域的背光LED的正极分时导通，由恒流控制模块将背光LED划分为若干个区域，并根据数据处理控制芯片处理后的调光控制信号控制多个区域的背光LED的分时量灭，从而实现了一个恒流通道控制多个分区，实现少量通道多分区控制，达到多通道多分区的效果，减少了成本，方便对调光***的控制，而且增加了产品的可靠性和稳定性。
可以理解的是，对本领域普通技术人员来说，可以根据本公开的技术方案及其公开构思加以等同替换或改变，而所有这些改变或替换都应属于本公开所附的权利要求的保护范围。
工业实用性
本公开提供的一种背光源的调光控制***、调光控制方法及显示装置，由数据处理控制芯片发送处理后的调光控制信号至恒流控制模块，并发送特定时序的行开关信号至行扫描单元电路，然后由行扫描单元电路根据特定时序的行开关信号控制多个区域的背光LED的正极分时导通，由恒流控制模块根据数据处理控制芯片处理后的调光控制信号控制多个区域的背光LED的分时量灭，从而实现了一个恒流通道控制多个分区，实现少量通道多分区控制，达到多通道多分区的效果，减少了成本，方便对调光***的控制，而且增加了产品的可靠性和稳定性。

Claims (15)

  1. 一种背光源的调光控制***，其特征在于，包括：
    主控芯片，用于向数据处理控制芯片发送调光控制信号；
    数据处理控制芯片，用于接收主控芯片的调光控制信号并进行处理后发送至恒流控制模块，并发送特定时序的行开关信号至行扫描单元电路；
    电源供电模块，用于给主控芯片、数据处理控制芯片和背光LED供电；
    至少一个行扫描单元电路，用于根据数据处理控制芯片发送的特定时序的行开关信号控制多个区域的背光LED的正极分时导通；
    至少一个恒流控制模块，用于将背光LED划分为若干个区域，并根据数据处理控制芯片处理后的调光控制信号控制多个区域的背光LED的分时量灭。
  2. 根据权利要求1所述的背光源的调光控制***，其特征在于，所述数据处理控制芯片设定有通信协议，所述通信协议为SPI通信协议、I2C协议、两线协议或多线协议中的一种。
  3. 根据权利要求1所述的背光源的调光控制***，其特征在于，所述行扫描单元电路包括若干个行扫开关，每个行扫开关的一端连接电源供电模块，每个行扫开关的另一端连接一背光LED区域的正极，每个行扫开关的控制端均连接数据处理控制芯片。
  4. 根据权利要求3所述的背光源的调光控制***，其特征在于，所述数据处理控制芯片具体用于接收主控芯片的调光控制信号并处理，并根据行扫描单元电路中行扫开关的数量生成N个行开关信号后将其发送至行扫描单元电路中对应的行扫开关，其中，任意两个行开关信号为高电平信号的时刻均不同，N表示行扫开关的数量。
  5. 根据权利要求4所述的背光源的调光控制***，其特征在于，N个所述行开关信号保持高电平信号的持续时间之和为一个调光控制信号的场同步信号的周期。
  6. 根据权利要求5所述的背光源的调光控制***，其特征在于，所述恒流控制模块包括恒流控制单元和高压隔离开关控制单元，所述高压隔离开关控制单元连接多个区域的背光LED的负极和恒流控制单元，所述恒流控制单元还连接数据处理控制芯片。
  7. 根据权利要求6所述的背光源的调光***，其特征在于，所述恒流控制单元为恒流控制芯片。
  8. 根据权利要求6所述的背光源的调光***，其特征在于，所述恒流控制单元用于将背光LED划分为若干个区域，并根据数据处理控制芯片处理后的调光控制信号控制多个区域的背光LED的分时量灭。
  9. 根据权利要求6所述的背光源的调光***，其特征在于，所述高压隔离开关控制单元用于设定恒流控制单元的最高电压值。
  10. 根据权利要求6所述的背光源的调光控制***，其特征在于，所述背光LED呈矩阵式排列，每一行背光LED组成一背光LED区域，同一列的背光LED的负极相连、并连接高压隔离开关控制单元。
  11. 根据权利要求10所述的背光源的调光控制***，其特征在于，所述高压隔离开关控制单元包括MOS管、第一电阻和第二电阻，所述MOS管的漏极连接背光LED的负极，所述MOS管的栅极连接第一电阻的一端和第二电阻的一端，所述MOS管的源极连接恒流控制单元，所述第一电阻的另一端接地，所述第二电阻的另一端连接直流电源。
  12. 根据权利要求11所述的背光源的调光控制***，其特征在于，所述MOS管为NMOS管。
  13. 根据权利要求11所述的背光源的调光控制***，其特征在于，所述直流电源的电压值小于所述恒流控制单元的最大耐压值。
  14. 一种采用如权利要求1所述的背光源的调光控制***的调光控制方法，其特征在于，包括如下步骤：
    由数据处理控制芯片接收主控芯片发送的调光控制信号并进行处理；
    数据处理控制芯片发送处理后的调光控制信号至恒流控制模块，并发送特定时序的行开关信号至行扫描单元电路；
    由行扫描单元电路根据数据处理控制芯片发送的特定时序的行开关信号控制多个区域的背光LED的正极分时导通；
    由恒流控制模块将背光LED划分为若干个区域，并根据数据处理控制芯片处理后的调光控制信号控制多个区域的背光LED的分时量灭。
  15. 一种显示装置，其特征在于，包括如权利要求1-13任意一项所述的背光源的调光控制***，所述显示装置采用如权利要求14所述的调光控制方法进行调光。
PCT/CN2018/113594 2018-09-21 2018-11-02 一种背光源的调光控制***、调光控制方法及显示装置 WO2020056872A1 (zh)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201811107385.6 2018-09-21
CN201811107385.6A CN109166532A (zh) 2018-09-21 2018-09-21 一种背光源的调光控制***、调光控制方法及显示装置

Publications (1)

Publication Number Publication Date
WO2020056872A1 true WO2020056872A1 (zh) 2020-03-26

Family

ID=64880287

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2018/113594 WO2020056872A1 (zh) 2018-09-21 2018-11-02 一种背光源的调光控制***、调光控制方法及显示装置

Country Status (2)

Country Link
CN (1) CN109166532A (zh)
WO (1) WO2020056872A1 (zh)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114758627A (zh) * 2022-04-24 2022-07-15 福州京东方光电科技有限公司 一种灯板结构、驱动方法及相关设备

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110136654B (zh) * 2019-04-03 2021-01-26 深圳康佳电子科技有限公司 一种调光背光分区调光控制方法、智能终端及存储介质
CN111445867B (zh) * 2020-04-22 2021-08-24 Tcl华星光电技术有限公司 背光分区驱动模组、背光装置及显示装置
CN113077762A (zh) * 2021-03-17 2021-07-06 Tcl华星光电技术有限公司 Mini LED背光模组的驱动方法、驱动电路及显示装置
CN113674623A (zh) * 2021-08-13 2021-11-19 Tcl华星光电技术有限公司 背光灯板、背光模组及显示装置
CN113689782A (zh) * 2021-08-19 2021-11-23 武汉华星光电技术有限公司 背光模组及显示装置
CN113990264A (zh) * 2021-10-28 2022-01-28 深圳创维－Rgb电子有限公司 背光驱动的功率保护方法、***、显示设备以及存储介质
CN114023273B (zh) * 2021-11-22 2023-03-21 深圳创维－Rgb电子有限公司 局域调光驱动电路、方法、***及电子设备
CN114141204B (zh) 2021-11-29 2023-03-31 Tcl华星光电技术有限公司 背光驱动电路及显示装置
CN114267304B (zh) * 2021-12-30 2023-01-20 合肥瑞识智能科技有限公司 一种Mini-LED背光模组及其驱动方法
CN114333714A (zh) * 2021-12-31 2022-04-12 上海中航光电子有限公司 一种背光模组及其调光方法、显示装置
CN115268139A (zh) * 2022-07-12 2022-11-01 Tcl华星光电技术有限公司 显示模组及其背光模组
CN115376472B (zh) * 2022-09-29 2023-09-19 惠科股份有限公司 背光模组、显示模组及电子设备

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050184952A1 (en) * 2004-02-09 2005-08-25 Akitoyo Konno Liquid crystal display apparatus
US20080238336A1 (en) * 2007-03-29 2008-10-02 Hong Kong Applied Science And Technology Research Back-Light Devices and Displays Incorporating Same
WO2012060288A1 (ja) * 2010-11-04 2012-05-10 シャープ株式会社 表示装置およびその駆動方法
CN103839529A (zh) * 2014-02-25 2014-06-04 青岛海信电器股份有限公司 一种背光源的驱动***及方法
CN104332140A (zh) * 2014-10-28 2015-02-04 深圳创维－Rgb电子有限公司 用于区域调光的背光驱动***及区域调光方法
CN107633818A (zh) * 2016-07-18 2018-01-26 群创光电股份有限公司 背光驱动装置及包含其的显示器
CN107945748A (zh) * 2017-12-12 2018-04-20 京东方科技集团股份有限公司 一种背光驱动装置、方法、背光模组以及显示装置

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI293543B (en) * 2005-12-07 2008-02-11 Ind Tech Res Inst Illumination brightness and color control system and method thereof
CN102456326B (zh) * 2010-10-21 2013-10-16 福建捷联电子有限公司 一种液晶显示器单输入单输出led灯管控制电路
CN102610207B (zh) * 2012-03-31 2014-03-26 青岛海信电器股份有限公司 液晶显示器驱动方法及液晶显示器、液晶电视
CN102917516B (zh) * 2012-11-14 2015-04-29 深圳市华星光电技术有限公司 解决恒流驱动芯片温度过高的方法及led灯条驱动电路
CN103177698B (zh) * 2013-03-27 2016-02-03 深圳市华星光电技术有限公司 一种led背光驱动电路及背光模组
CN108399897B (zh) * 2018-05-04 2020-06-30 京东方科技集团股份有限公司 背光驱动电路及方法、背光模组、背光电路和显示装置

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050184952A1 (en) * 2004-02-09 2005-08-25 Akitoyo Konno Liquid crystal display apparatus
US20080238336A1 (en) * 2007-03-29 2008-10-02 Hong Kong Applied Science And Technology Research Back-Light Devices and Displays Incorporating Same
WO2012060288A1 (ja) * 2010-11-04 2012-05-10 シャープ株式会社 表示装置およびその駆動方法
CN103839529A (zh) * 2014-02-25 2014-06-04 青岛海信电器股份有限公司 一种背光源的驱动***及方法
CN104332140A (zh) * 2014-10-28 2015-02-04 深圳创维－Rgb电子有限公司 用于区域调光的背光驱动***及区域调光方法
CN107633818A (zh) * 2016-07-18 2018-01-26 群创光电股份有限公司 背光驱动装置及包含其的显示器
CN107945748A (zh) * 2017-12-12 2018-04-20 京东方科技集团股份有限公司 一种背光驱动装置、方法、背光模组以及显示装置

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114758627A (zh) * 2022-04-24 2022-07-15 福州京东方光电科技有限公司 一种灯板结构、驱动方法及相关设备
CN114758627B (zh) * 2022-04-24 2024-03-26 福州京东方光电科技有限公司 一种灯板结构、驱动方法及相关设备

Also Published As

Publication number Publication date
CN109166532A (zh) 2019-01-08

Similar Documents

Publication Publication Date Title
WO2020056872A1 (zh) 一种背光源的调光控制***、调光控制方法及显示装置
CN209070956U (zh) 背光驱动电路、背光源及显示装置
CN108399897B (zh) 背光驱动电路及方法、背光模组、背光电路和显示装置
CN105938703B (zh) 可消除led鬼影的驱动芯片、驱动电路以及驱动方法
TWI694426B (zh) 顯示裝置
US7714517B2 (en) LED driver with current sink control and applications of the same
US7659672B2 (en) LED driver
JP5038982B2 (ja) Ｌｅｄ駆動デバイス
CN102214432B (zh) 电源管理与控制模块以及液晶显示器
US7569997B2 (en) Self-calibrated integration method of light intensity control in LED backlighting
WO2020010684A1 (zh) Led显示装置及其驱动方法
US9622307B2 (en) Apparatus and technique for modular electronic display control
US9084307B2 (en) Light emitting device, display device, light emitting component driver circuit, and method of driving light emitting component
US20080238336A1 (en) Back-Light Devices and Displays Incorporating Same
CN209692916U (zh) 一种背光源控制***及电视机
US10834795B2 (en) Backlight drive circuit, backlight driving method, and display device
CN109410865B (zh) 驱动装置以及显示设备
KR101733202B1 (ko) 발광다이오드 백라이트 유닛 및 그 구동방법
JP2022002208A (ja) ディスプレイのためのバックライト装置およびその電流制御集積回路
CN108538259B (zh) 背光驱动电路、背光驱动方法及显示装置
US20170263194A1 (en) Display device and method for driving the same
CN105093642A (zh) 一种背光源
CN106057127A (zh) 显示装置及其驱动方法
CN102446496A (zh) 背光灯装置、具备该背光灯装置的显示装置以及照明装置
WO2021218604A1 (zh) 一种投影装置

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: 18934167

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: 18934167

Country of ref document: EP

Kind code of ref document: A1