WO2020177515A1 - 液晶拼接显示模组、液晶拼接显示模组的控制系统和方法 - Google Patents

液晶拼接显示模组、液晶拼接显示模组的控制系统和方法 Download PDF

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Publication number
WO2020177515A1
WO2020177515A1 PCT/CN2020/075032 CN2020075032W WO2020177515A1 WO 2020177515 A1 WO2020177515 A1 WO 2020177515A1 CN 2020075032 W CN2020075032 W CN 2020075032W WO 2020177515 A1 WO2020177515 A1 WO 2020177515A1
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Prior art keywords
signal
sub
display
local dimming
original
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PCT/CN2020/075032
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English (en)
French (fr)
Inventor
闫恒宇
王建亭
程金辉
孟占昆
牛汉章
贺能
杨剑
Original Assignee
京东方科技集团股份有限公司
北京京东方显示技术有限公司
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Publication of WO2020177515A1 publication Critical patent/WO2020177515A1/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

Definitions

  • the present disclosure relates to the technical field of liquid crystal display. Specifically, the present disclosure relates to a liquid crystal splicing display module, a control system and method of the liquid crystal splicing display module.
  • the LCD splicing display module is a display device that can realize split single-screen display or multi-screen display according to different usage requirements. For example, it can realize: single-screen split display, single-screen independent display, arbitrary combination display, full-screen LCD splicing, etc. .
  • the LCD splicing display module includes a plurality of sub-display modules, and the plurality of sub-display modules are spliced together in the form of a matrix.
  • embodiments of the present disclosure provide a control system for a liquid crystal splicing display module, including: a master controller and a plurality of sub-control circuits; the master controller is used to output a master control signal, the master control signal Including the original local dimming sub-signal and/or the original display sub-signal; the sub-control circuit includes a signal controller and a backlight driving circuit; the signal controller is electrically connected to the backlight driving circuit, and the backlight driving circuit is used for the backlight in the LCD splicing display module The light-emitting unit of the module is electrically connected; the signal controller is electrically connected to the master controller, and is used to receive the master control signal output by the master controller, and determine the target local dimming sub-signal according to the original local dimming sub-signal in the master control signal Signal; Send the target local dimming sub-signal to the backlight drive circuit.
  • the backlight driving circuit includes a backlight driver and a backlight power supply
  • the backlight driver is electrically connected with the signal controller, and the backlight driver and the backlight power supply are used to form a loop with the light emitting unit of the backlight module.
  • the master controller and the signal controllers in the plurality of sub-control circuits are connected in series in sequence;
  • the signal controller in the sub-control circuit is used to receive the master control signal output by the signal controller in the previous sub-control circuit or the master control signal output by the master controller, The master control signal is output to the signal controller in the next sub-control circuit.
  • the sub-control circuit further includes a display driver; the display driver is used for electrically connecting with the display panel of the sub-display module of the LCD splicing display module;
  • the display driver is electrically connected to the signal controller, and is configured to determine a target display sub-signal adapted to the target display area according to the original display sub-signal in the master control signal; display the target sub-signal Send to the display driver so that the display driver drives the display panel of the sub-display module to display an image in the target display area.
  • the signal controller is a system-level chip.
  • the embodiments of the present disclosure provide a liquid crystal splicing display module, including a plurality of sub-display modules, and the control system of the liquid crystal splicing display module provided in the first aspect of the embodiments of the present disclosure; each of the sub-display modules The group corresponds to each sub-control circuit in the control system.
  • the sub-display module includes a backlight module, and the backlight module includes at least one light emitting unit.
  • the backlight module is electrically connected to the backlight driving circuit.
  • the backlight module, the backlight driver of the backlight driving circuit and the backlight power supply form a loop.
  • the embodiments of the present disclosure provide a method for controlling the LCD splicing display module, which is implemented based on the control system of the LCD splicing display module provided in the first aspect of the embodiments of the present disclosure, including: each sub-control circuit in the control system Receive the master control signal; determine the target local dimming sub signal according to the original local dimming sub signal in the master control signal; send the target local dimming sub signal to the backlight driving circuit and the backlight driving circuit.
  • the determining the target local dimming signal according to the original local dimming signal in the master control signal includes:
  • the original local dimming signal is converted into a target local dimming area adapted to the target local dimming area signal.
  • the original local dimming sub-signal is converted into a target adapted to the target local dimming area Local dimming photon signal, including:
  • the first magnification or original local dimming required for the original local dimming area to be enlarged to the target local dimming area is determined The area is reduced to the first reduction multiple required by the target local dimming area;
  • the original local dimming sub-signal is converted into a target local dimming sub-signal adapted to the target local dimming area.
  • the first magnification required for the original local dimming area to be enlarged to the target local dimming area or The reduction of the original local dimming area to the first reduction factor required for the target local dimming area includes:
  • the maximum pixel display area of the display panel of the sub-display module represented by the preset display panel resolution information of the sub-display module is taken as the target display area, and it is determined that the original display area needs to be enlarged to the target display area
  • the minimum pixel display area of the display panel of the sub-display module represented by the preset display panel resolution information of the sub-display module is taken as the target display area, and it is determined that the original display area is reduced to the target display area.
  • the second reduction factor is used as the first reduction factor.
  • control method of the present invention also includes:
  • the target display sub-signal is sent to a display driver, so that the display driver drives the display panel of the sub-display module to display an image in the target display area.
  • each sub-control circuit in the control system receives the master control signal, it further includes:
  • a part of the original local dimming signal associated with the original display sub-signal in the master control signal is determined as the original local dimming sub-signal.
  • the neutron control circuit of the control system receives the master control signal, including:
  • the signal controller in the sub-control circuit After the signal controller in the sub-control circuit receives the master control signal output by the signal controller or the master controller in the previous sub-control circuit, it outputs the master control signal to the next One of the signal controllers in the sub-control circuit.
  • FIG. 1 is a schematic structural diagram of a control system of a liquid crystal splicing display module provided by an embodiment of the disclosure
  • FIG. 2 is a schematic diagram of a connection state between a backlight driving circuit and a backlight module in a control system for a liquid crystal splicing display module provided by an embodiment of the disclosure;
  • FIG. 3 is a schematic structural diagram of a liquid crystal splicing display module provided by an embodiment of the disclosure.
  • FIG. 4 is a schematic structural diagram of a display module and sub-display modules in a liquid crystal splicing display module provided by an embodiment of the disclosure
  • FIG. 5 is a schematic flowchart of a method for controlling a liquid crystal splicing display module according to an embodiment of the disclosure
  • FIG. 6 is a schematic flowchart of another method for controlling a liquid crystal splicing display module according to an embodiment of the disclosure
  • 22-Backlight driving circuit 2221-Backlight driver; 222-Backlight power supply; 23-Display driver;
  • 3-Backlight module 31-Light-emitting unit; 311-Light-emitting body; 312-Switch device;
  • local dimming refers to dividing the backlight module into multiple sub-areas.
  • the brightness of the backlight is adjusted according to the gray level of the image on the display panel corresponding to the corresponding sub-areas. This is the technology to achieve energy saving and enhanced image quality.
  • the LCD splicing display module usually has a local dimming function, which can adjust the backlight brightness of each unit area in the LCD splicing display module.
  • the display driver in the display device receives the master control signal sent by the main controller, and performs the calculation work of local dimming, and the relevant calculation information is converted and calculated by the processor and then sent to the backlight driving circuit, and the backlight driving circuit Control the light-emitting state of the corresponding light-emitting unit to realize local dimming of the LCD splicing display module.
  • the image represented by the display signal in the master control signal output by the master controller needs to be divided into multiple image blocks, and the display panel of each sub-display module displays one of the images. Piece.
  • the resolution of the image represented by the display signal in the master control signal may be inconsistent with the resolution of the LCD mosaic display module.
  • each image block needs to be enlarged so that the resolution of each image block corresponds to the corresponding resolution.
  • the resolution of the display device is adapted.
  • each image block is 960*540.
  • the resolution of the LCD splicing display module is 1920*1080. If the image block is not enlarged, each image block occupies only a quarter of the display panel of the corresponding sub-display module, and the user is watching the image The area is small and the viewing is inconvenient. Therefore, it is necessary to convert the display signal so that the resolution of the image represented by the converted display signal is compatible with the resolution of the corresponding sub-display module.
  • the backlight driving circuit can drive the light-emitting unit in the corresponding area of the backlight module to perform local dimming according to the converted local dimming signal.
  • the local dimming signal conversion work needs to be performed by the display driver, and the converted local dimming signal is sent to the backlight driving circuit.
  • the display driver with the local dimming signal conversion function is expensive, resulting in LCD splicing display The overall cost of the module is relatively high.
  • the original display sub-signal, the unconverted display signal corresponds to the display sub-signal of a sub-display module.
  • the target display sub-signal corresponds to the display sub-signal of a sub-display module in the converted display signal.
  • the original display area refers to the area in the display panel of the sub-display module that is used to display the image represented by the original display sub-signal.
  • the target display area refers to the area in the display panel of the sub-display module that is used to display the image represented by the target display sub-signal.
  • the original local dimming signal, and the unconverted local dimming signal corresponds to the local dimming signal of a sub-display module.
  • the target local dimming signal, and the converted local dimming signal corresponds to the local dimming signal of a sub-display module.
  • the original local dimming area under the control of the original local dimming sub-signal, is the area where each light-emitting unit used to perform local dimming in the backlight module is located.
  • the target local dimming area under the control of the target local dimming sub-signal, is the area where each light-emitting unit used to perform local dimming in the backlight module is located.
  • FIG. 1 is a schematic structural diagram of a control system of a liquid crystal splicing display module provided by an embodiment of the disclosure. As shown in FIG. 1, it includes: a master controller 1 and multiple sub-control circuits 2; the master controller is used to output a master control signal , The total control signal includes the original local dimming sub-signal and the original display sub-signal.
  • the sub-control circuit 2 includes a signal controller 21 and a backlight drive circuit 22.
  • the signal controller 21 is electrically connected to the backlight drive circuit 22.
  • the backlight drive circuit 22 is used for connecting each light-emitting unit 31 of the backlight module 3 in the LCD splicing display module. Electric connection.
  • the signal controller 21 is electrically connected to the master controller 1, and is used to receive the master control signal output by the master controller 1, and determine the target local dimming signal according to the original local dimming signal in the master control signal;
  • the dimming sub-signal is sent to the backlight driving circuit 22 so that the backlight driving circuit 22 drives the light-emitting unit 31 in the target local dimming area to perform local dimming.
  • the master controller of the present disclosure is a core system-on chip (System on Chip, SOC); the master control signal output by the master controller is not limited to the original local dimming sub-signal and/or the original display sub-signal, but also includes Control signals that regulate the original local dimming sub-signal and/or the original display sub-signal
  • the display driver of the present disclosure is a timing controller (Timing Controller, TCON), and the timing controller can provide a reliable timing control signal to control the liquid crystal display to display stably.
  • TCON Timing Controller
  • the signal controller 21 can be used to determine the original local dimming sub-signal in the master control signal.
  • the target local dimming sub-signal is adapted to the target local dimming area, and the target local dimming sub-signal is directly sent to the backlight driving circuit 22.
  • the signal controller 21 can replace part of the functions of the display driver 23 in the related art, and the display driver 23 does not need to have the function of converting local dimming signals. Therefore, the display driver 23 can choose a model with simple functions and a low price. Effectively reduce the cost of LCD splicing display modules.
  • each signal controller 21 can identify the corresponding original signal (such as the original local dimming sub-signal or the original display sub-signal, etc.) in the main control signal, the control system does not need to set up a screen splitter to divide the main control signal. This further reduces the cost of the LCD splicing display module.
  • the backlight driving circuit 22 includes a backlight driver 221 and a backlight power supply 222.
  • the signal controller 21 is electrically connected to the backlight driver 221, and the backlight driver 221 and the backlight power supply 222 are used to form a loop with each light emitting unit 31.
  • the light-emitting unit 31 includes a light-emitting body 311 and a switch device 312, which emits light
  • the body 311 and the switching device 312 are connected in series.
  • the local dimming signal input terminal of the backlight driver 221 is electrically connected to the signal controller 21, and the feedback signal output terminal of the backlight driver 221 is electrically connected to the feedback signal input terminal of the backlight power supply 222.
  • the power output terminal of the backlight power supply 222 is electrically connected to the input terminal of the luminous body 311 in each light-emitting unit 31, and the control signal output terminal of the backlight driver 221 is electrically connected to the switch device 312 in each light-emitting unit 31.
  • the light-emitting body 311 may be a light-emitting diode.
  • the light-emitting unit 31 is three light-emitting diodes connected in series.
  • the switching device 312 can be a MOS (Metal Oxide Semiconductor) tube. At this time, the control signal output terminal of the backlight driver 221 is electrically connected to the gate of the switching device 312.
  • the switching device 312 When the control signal output terminal of the backlight driver 221 outputs a high voltage, the switching device 312 is turned on, so that the luminous body 311 emits light; when the control signal output terminal of the backlight driver 221 outputs a low voltage, the switching device 312 is turned off and the luminous body 311 is off. As the switching device 312 is turned on and off, a Pulse Width Modulation (PWM) signal is formed in the loop, and the backlight driver 221 implements local dimming by PWM signal adjustment according to the received target local dimming sub-signal .
  • PWM Pulse Width Modulation
  • the master controller is electrically connected to the sub-control circuit, and the master controller 1 and the signal controllers 21 in the multiple sub-control circuits 2 are serially connected in series.
  • the signal controller 21 in each current sub-control circuit 2 is used to receive the master control signal output by the signal controller 21 or master controller 1 in the previous sub-control circuit 2, and then output the master control signal to the next sub-control circuit 2 signal controller 21.
  • sub-control circuit and the master controller may be directly electrically connected or indirectly electrically connected.
  • the signal controller 21 in the first sub-control circuit 2 receives the master control signal output by the master controller 1, and then outputs the master control signal to the signal control in the next sub-control circuit 2. ⁇ 21; the signal controller 21 in the sub-control circuit 2 in other positions receives the master control signal output by the signal controller 21 in the previous sub-control circuit 2, and then outputs the master control signal to the next sub-control circuit 2 Signal controller 21.
  • the original source of the master control signal output and received between the signal controllers 21 is the master controller 1, and the content of the master control signal received by each signal controller 21 is consistent.
  • the master control signal output by the master controller 1 can be sent from the previous signal controller 21 to the next signal controller 21, which significantly reduces the master control signal
  • the attenuation ensures the stability of the master control signal transmission process.
  • the sub-control circuit 2 further includes a display driver 23, and the display driver 23 is used for electrically connecting with the display panel of the sub-display module.
  • the signal controller 21 is electrically connected to the display driver 23, and is used to determine the target display sub-signal adapted to the target display area according to the original display sub-signal in the master control signal; send the target display sub-signal to the display driver 23 to display
  • the driver 23 drives the display panel of the sub-display module to display images in the target display area.
  • the signal controller 21 may also include a system-on chip (System on Chip, SOC).
  • SOC System on Chip
  • the SOC combines the microprocessor, analog IP core, digital IP core, and memory (or off-chip storage control). Interface) is integrated in a single chip, with strong computing power.
  • the embodiments of the present disclosure also provide a liquid crystal splicing display module, as shown in FIG. 3, which is a schematic structural diagram of a liquid crystal splicing display module provided by the embodiments of the present disclosure; including multiple sub-displays In the module and the control system provided by the embodiments of the present disclosure, each sub-display module corresponds to each sub-control circuit in the control system.
  • the sub-display module includes a backlight module
  • the backlight module includes at least one light-emitting unit
  • the backlight module is electrically connected to the backlight driving circuit.
  • the backlight module and the backlight driver of the backlight driving circuit and the backlight power supply form a loop.
  • the backlight module 3 includes a plurality of light emitting units 31.
  • the light emitting unit 31 includes a light emitting body 311 and a switching device 312, and the light emitting body 311 and the switching device 312 are connected in series.
  • the local dimming signal input terminal of the backlight driver 221 is electrically connected to the signal controller 21, and the feedback signal output terminal of the backlight driver 221 is electrically connected to the feedback signal input terminal of the backlight power supply 222.
  • the power output end of the backlight power supply 222 is electrically connected to each light emitting unit 31, the light emitting body 311 in each light emitting unit is connected in series, and the control signal output end of the backlight driver 221 is electrically connected to the switching device 312 in each light emitting unit 31.
  • the switching device 312 can be a MOS (Metal Oxide Semiconductor) tube, so the control signal output end of the backlight driver 221 is electrically connected to the gate of the switching device 312.
  • the sub-display module 41 also includes a display panel, and the display driver 23 in the sub-control circuit 2 is electrically connected to the display panel belonging to the same sub-display module 41.
  • the display driver 23 in the sub-control circuit 2 is electrically connected to the display panel belonging to the same sub-display module 41.
  • FIG. 4 is a schematic structural diagram of a display module and sub-display modules in a liquid crystal mosaic display module provided by an embodiment of the disclosure. It should be noted that one liquid crystal mosaic display module may include multiple sub-display modules.
  • the 2*2 LCD splicing display module 4 shown in FIG. 4 includes 4 sub-display modules 41.
  • the signal controller since the signal controller itself has a logic operation function, the signal controller can be used to determine the adaptation target based on the original local dimming sub-signal in the master control signal
  • the target local dimming signal of the local dimming area is directly sent to the backlight driving circuit.
  • the signal controller can replace some of the functions of the display driver in the related technology, and the display driver does not need to have the function of converting local dimming signals. Therefore, the display driver can choose a model with simple functions and low prices, thereby effectively reducing the LCD The cost of splicing display modules.
  • each signal controller can identify the corresponding original signal (such as the original local dimming sub-signal or the original display sub-signal, etc.) in the main control signal, the control system does not need to set up a screen splitter to divide the main control signal. The cost of the LCD splicing display module is further reduced.
  • the embodiment of the present disclosure also provides a method for controlling the LCD splicing display module, which is implemented based on the control system of the LCD splicing display module provided by the embodiment of the present disclosure.
  • the flow diagram of the method is shown in FIG. 5 ,include:
  • Each sub-control circuit 2 in the control system receives the master control signal.
  • the master controller 1 in the control system outputs a master control signal
  • the signal controller 21 in each sub-control circuit 2 receives the master control signal.
  • the control Each sub-control circuit 2 in the system receives the master control signal, including: the signal controller 21 in the sub-control circuit 2 is used to receive the master control signal output by the signal controller 21 or the master controller 1 in the previous sub-control circuit 2, The master control signal is output to the signal controller 21 in the next sub-control circuit 2.
  • the master control signal output by the master controller 1 includes the original display signal, the original local dimming signal, and the original display control signal.
  • the content of the master control signal received by the signal controller 21 in each sub-control circuit 2 is the same. Therefore, each signal controller 21 also needs to identify its own corresponding part of the signal in the master control signal.
  • each sub-control circuit 2 in the system receives the master control signal, it also includes: determining the original display sub-signal according to the preset partition information; and determining the original local dimming signal in the master control signal that is associated with the original display sub-signal as Original local dimming photon signal.
  • S102 Determine the target local dimming signal according to the original local dimming signal in the master control signal.
  • the signal controller 21 needs to confirm whether the original local dimming sub-signal needs to be converted, and if no conversion is required, the original local dimming sub-signal is determined as the target local dimming sub-signal adapted to the target local dimming area ; If conversion is needed, the converted original local dimming sub-signal is determined as the target local dimming sub-signal adapted to the target local dimming area.
  • the judgment condition for determining whether the original local dimming signal needs to be converted can be determined according to actual needs. For example, it can be determined whether the original local dimming sub-signal needs to be converted according to whether the area occupied by the image block represented by the original display sub-signal on the display panel of the corresponding sub-display module reaches a preset value. Generally speaking, it is generally expected that the image block represented by the original display sub-signal can fill the display panel of the corresponding sub-display module.
  • determining the target local dimming sub-signal adapted to the target local dimming area includes: according to the master control The original display sub-signal in the signal and the preset display panel resolution information of the sub-display module convert the original local dimming sub-signal into a target local dimming sub-signal adapted to the target local dimming area.
  • S103 Send the target local dimming sub-signal to the backlight driving circuit 22.
  • the method for controlling the LCD splicing display module further includes: determining the target display sub-signal adapted to the target display area according to the original display sub-signal in the master control signal; sending the target display sub-signal To the display driver 23, the display driver 23 drives the display panel of the sub-display module to display images in the target display area.
  • the embodiment of the present disclosure also provides another method for controlling the LCD splicing display module, which is implemented based on the control system of the LCD splicing display module provided by the embodiment of the present disclosure.
  • the flow diagram of the method is shown in FIG. 6 Show, including:
  • the master controller 1 and the signal controllers 21 in the multiple sub-control circuits 2 are connected in series in sequence. Therefore, the signal controller 21 in the first sub-control circuit 2 receives the master control signal output by the master controller 1, and then outputs the master control signal to the signal controller 21 in the next sub-control circuit 2; The signal controller 21 in the sub-control circuit 2 receives the master control signal output by the signal controller 21 in the previous sub-control circuit 2 and then outputs the master control signal to the signal controller 21 in the next sub-control circuit 2.
  • the original source of the master control signal output and received between the signal controllers 21 is the master controller 1, and the content of the master control signal received by each signal controller 21 is consistent.
  • S202 Determine the original display sub-signal according to the preset partition information; determine a part of the original local dimming signal associated with the original display sub-signal in the master control signal as the original local dimming sub-signal.
  • partition information may be stored in the signal controller 21 when the system of the signal controller 21 is programmed.
  • the partition information includes at least the number of partitions and the correspondence between the partitions and the sub-display module 41.
  • the number of image blocks that the image represented by the original display signal in the master control signal is expected to be divided into is consistent with the number of partitions. For example, if the number of partitions is 4, it means that the image represented by the original display signal will be divided into 4 image blocks. There may be a one-to-one correspondence between the partitions and the sub-display modules 41. For example, for a 2*2 LCD splicing display module display module 4, the number of partitions may be 4, and each sub-display module 41 is used to display the corresponding Image block.
  • each partition corresponds to the image block represented by each original display sub-signal.
  • the signal controller 21 learns the corresponding partition, it can use the resolution information of the image represented by the original display signal. Determine the original display sub-signal.
  • a certain signal controller 21 corresponds to the first partition, and the first partition corresponds to the first image block.
  • the resolution of the image represented by the original display signal is 1920*1080
  • the first image block is the overlapping area of the pixel from the 1st column to the 960th column and the pixel from the 1st row to the 540th row in the image
  • the data information corresponding to the above-mentioned first image module is the original display sub-signal required by the signal controller 21.
  • other signal controllers 21 can also determine the required original display sub-signals.
  • the original display signal is related to the original local dimming signal.
  • the signal controller 21 determines the required original display sub-signal, it can associate the master control signal with the original display sub-signal.
  • the local dimming signal is determined as the original local dimming signal.
  • S203 and S205 can be executed at the same time. Of course, there may also be a time difference between the start of execution of S204 and S205. It is only necessary to ensure that the action of displaying the image on the display panel of the sub-display module and The corresponding local dimming action can be synchronized.
  • the original local dimming sub-signal is converted into a target local dimming sub-signal adapted to the target local dimming area.
  • the original local dimming signal is converted into a target local dimming area adapted to the target local dimming area.
  • the signal includes: according to the original display sub-signal and the preset display panel resolution information of the sub-display module, determining the first magnification or original local dimming required for the original local dimming area to be enlarged to the target local dimming area The area is reduced to the first reduction factor required by the target local dimming area; according to the first magnification or the first reduction factor, the original local dimming signal is converted into the target local dimming factor adapted to the target local dimming area signal.
  • determining the first magnification required for the original local dimming area to be enlarged to the target local dimming area includes: Set the maximum pixel display area of the display panel of the sub-display module represented by the display panel resolution information of the sub-display module as the target display area, and determine the second magnification required for the original display area to be enlarged to the target display area; Use the second magnification as the first magnification; or
  • the minimum pixel display area of the display panel of the sub-display module represented by the preset display panel resolution information of the sub-display module is taken as the target display area, and it is determined that the original display area is reduced to the target display area.
  • the second reduction factor is used as the first reduction factor.
  • the specific steps of determining the second magnification may be:
  • the number of pixel rows in the maximum pixel display area of the display panel of the sub-display module is 1920, and the number of pixel columns is 1080.
  • the number of rows and columns of the original display area can be determined according to the resolution of the image block represented by the original display sub-signal. For example, if the resolution of the image represented by the original display signal is 1920*1080, and the image block represented by the original display sub-signal accounts for a quarter of the image represented by the original display signal, the image represented by the original display sub-signal
  • the resolution of the block is 960*540.
  • the number of rows of pixels in the original display area is 960, and the number of columns of pixels is 540. Both the first ratio and the second ratio are 2.
  • both the length and width of the original display area need to be enlarged twice, and the second enlargement factor is 4.
  • the value of the first ratio, the second ratio, or the second magnification can be blurred.
  • the number of pixel rows in the maximum pixel display area of the display panel of the sub-display module is 1920, and the number of pixel columns is 1080.
  • the resolution of the image represented by the original display signal is 1600*1200, and the resolution of the image block represented by the original display sub-signal is 800*600.
  • the first ratio When calculating the first ratio, divide 1920 by 800, the quotient is 2, and the remainder is 320. After blurring, the first ratio is 2; when calculating the second ratio, divide 1080 by 600, the quotient is 1, and the remainder is 480 , After blurring, the first ratio is 1.
  • the second magnification required for the original display area to be enlarged to the target display area is determined, and the first ratio is multiplied by the second ratio to obtain a second magnification of 2.
  • the length direction of the original display area needs to be enlarged twice
  • the width direction needs to be enlarged twice
  • the second magnification factor is 2.
  • the second magnification can be determined after S203 is executed. Therefore, it is not necessary to repeat the step of calculating the second magnification when S204 is executed. In S204, the second magnification calculated in S203 is directly used. The multiple is used as the first magnification.
  • the calculation method for determining the second zoom factor is similar to the calculation method for determining the second zoom factor, and will not be repeated here. After S203 is executed, S204 is executed.
  • S204 Send the target local dimming sub-signal to the backlight driving circuit 22, so that the backlight driving circuit 22 drives the light-emitting units 31 in the target local dimming area of the backlight module 3 to perform local dimming.
  • the target local dimming area of the backlight module 3 corresponds to the target display area of the display panel of the sub-display module.
  • the target display area may be the maximum pixel display area of the display panel of the sub-display module, then
  • the target local dimming area of the backlight module 3 is an area including all the light-emitting units 31 in the backlight module 3.
  • the switching device 312 When the control signal output terminal of the backlight driver 221 outputs a high voltage, the switching device 312 is turned on, so that the luminous body 311 emits light; when the control signal output terminal of the backlight driver 221 outputs a low voltage, the switching device 312 is turned off and the luminous body 311 is off.
  • a Pulse Width Modulation (PWM) signal is formed in the loop, and the backlight driver 221 implements local dimming by PWM signal adjustment according to the received target local dimming sub-signal .
  • the backlight driving circuit 22 drives the light-emitting unit 31 in the target local dimming area of the backlight module 3 to perform other specific steps of local dimming. For other specific steps, reference may be made to related technologies in the art, and details are not repeated here.
  • S205 Determine the target display sub-signal adapted to the target display area according to the original display sub-signal in the master control signal.
  • the signal controller 21 needs to confirm whether the original display sub-signal needs to be converted, and if it does not need to be converted, the original display sub-signal is determined to be the target local dimming sub-signal adapted to the target local dimming area; , The converted original display sub-signal is determined as the target display sub-signal adapted to the target display area.
  • the judgment condition for determining whether the original display sub-signal needs to be converted can be determined according to actual needs. For example, it can be determined whether the original local dimming sub-signal needs to be converted according to whether the area occupied by the image block represented by the original display sub-signal on the display panel of the corresponding sub-display module reaches a preset value. Generally speaking, it is usually expected that the image block represented by the original display sub-signal can fill the display panel of the corresponding sub-display module.
  • the maximum pixel display area of the display panel of the sub-display module represented by the display panel resolution information of the preset sub-display module is taken as the target display area, and the original display area is determined to be enlarged To the second magnification required for the target display area; according to the second magnification, the original display sub-signal is converted into a target display sub-signal adapted to the target display area.
  • the specific step of determining the second magnification in S205 is the same as the specific step of determining the second magnification in S203, and will not be repeated here.
  • S206 is executed.
  • S206 Send the target display sub-signal to the display driver 23, so that the display driver 23 drives the display panel of the sub-display module to display an image in the target display area.
  • the specific range of the display panel of the sub-display module in the target display area may be determined according to actual needs.
  • the target display area may be the maximum pixel display area of the display panel of the sub-display module.
  • the signal controller since the signal controller itself has the logic operation function, the signal controller can be used to determine the original local dimming sub-signal in the main control signal.
  • the target local dimming sub signal is adapted to the target local dimming area, and the target local dimming sub signal is directly sent to the backlight driving circuit.
  • the signal controller can replace some of the functions of the display driver in the related technology, and the display driver does not need to have the function of converting local dimming signals. Therefore, the display driver can choose a model with simple functions and low prices, thereby effectively reducing the LCD The cost of splicing display modules.
  • each signal controller can identify the corresponding original signal (such as the original local dimming sub-signal or the original display sub-signal, etc.) in the main control signal, the control system does not need to set up a screen splitter to divide the main control signal. The cost of the LCD splicing display module is further reduced.
  • the master control signal output by the master controller can be sent from the previous signal controller to the next signal controller, which significantly reduces the overall control signal Attenuation ensures the stability of the transmission process of the master control signal.
  • first and second are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Thus, the features defined with “first” and “second” may explicitly or implicitly include one or more of these features. In the description of the present disclosure, unless otherwise specified, “plurality” means two or more.
  • the terms “installed”, “connected”, and “connected” should be understood in a broad sense, for example, they can be fixed or detachable. Connected or integrally connected; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the internal communication between two components.
  • the specific meaning of the above-mentioned terms in the present disclosure can be understood in specific situations.

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Abstract

公开了一种液晶拼接显示模组、液晶拼接显示模组的控制系统和方法。该控制系统包括：总控器（1）以及多个子控制电路。子控制电路包括信号控制器（21）和背光驱动电路，信号控制器（21）与背光驱动电路电连接，背光驱动电路用于与背光模组中的发光单元电连接。信号控制器（21），与总控器（1）电连接，用于接收总控器（1）输出的总控信号，根据总控信号中的原始局部调光子信号，确定目标局部调光子信号；将目标局部调光子信号发送至背光驱动电路。

Description

液晶拼接显示模组、液晶拼接显示模组的控制系统和方法
相关申请的交叉引用
本公开主张在2019年3月4日在中国提交的中国专利申请号No.201910160956.0的优先权，其全部内容通过引用包含于此。
技术领域
本公开涉及液晶显示的技术领域，具体而言，本公开涉及一种液晶拼接显示模组、液晶拼接显示模组的控制系统和方法。
背景技术
液晶拼接显示模组是一种能够根据不同使用需求，实现画面分割单屏显示或多屏显示的显示设备，例如可以实现：单屏分割显示、单屏单独显示、任意组合显示、全屏液晶拼接等。液晶拼接显示模组包括多个子显示模组，多个子显示模组以矩阵的形式拼接在一起。
发明内容
本公开第一方面，本公开实施例提供了一种液晶拼接显示模组的控制系统，包括：总控器以及多个子控制电路；所述总控器用于输出总控信号，所述总控信号包括原始局部调光子信号和/或原始显示子信号；子控制电路包括信号控制器和背光驱动电路；信号控制器与背光驱动电路电连接，背光驱动电路用于与液晶拼接显示模组中背光模组的发光单元电连接；信号控制器，与总控器电连接，用于接收总控器输出的总控信号，根据总控信号中的原始局部调光子信号，确定目标局部调光子信号；将目标局部调光子信号发送至背光驱动电路。
其中，所述背光驱动电路包括背光驱动器和背光电源；
所述背光驱动器，与所述信号控制器电连接，所述背光驱动器和背光电源用于与所述背光模组的发光单元组成回路。
其中，所述总控器和多个所述子控制电路中的所述信号控制器依次串联；
所述子控制电路中的所述信号控制器用于接收上一个所述子控制电路中所述信号控制器输出的所述总控信号或所述总控器输出的所述总控信号，将所述总控信号输出至下一个所述子控制电路中的所述信号控制器。
其中，所述子控制电路还包括显示驱动器；显示驱动器用于与液晶拼接显示模组中子显示模组的显示面板电连接；
所述显示驱动器，与所述信号控制器电连接，用于根据所述总控信号中的所述原始显示子信号，确定出适应目标显示区域的目标显示子信号；将所述目标显示子信号发送至显示驱动器，使得所述显示驱动器驱动子显示模组的显示面板在所述目标显示区域内显示图像。
其中，所述信号控制器为系统级芯片。
第二方面，本公开实施例提供了一种液晶拼接显示模组，包括多个子显示模组、以及本公开实施例第一方面提供的液晶拼接显示模组的控制系统；所述各子显示模组与所述控制系统中的各子控制电路对应。
其中，所述子显示模组包括背光模组，所述背光模组包括至少一个发光单元。
其中，所述背光模组与所述背光驱动电路电连接。
其中，所述背光模组与所述背光驱动电路的所述背光驱动器和所述背光电源组成回路。
第三方面，本公开实施例提供了一种液晶拼接显示模组的控制方法，基于本公开实施例第一方面提供的液晶拼接显示模组的控制系统实现，包括：控制系统中各子控制电路接收总控信号；根据总控信号中的原始局部调光子信号，确定目标局部调光子信号；将目标局部调光子信号发送至背光驱动电路背光驱动电路。
其中，所述根据所述总控信号中的原始局部调光子信号，确定目标局部调光子信号，包括：
根据所述总控信号中的原始显示子信号和预设的子显示模组的显示面板分辨率信息，将所述原始局部调光子信号转换为适应目标局部调光区域的目标局部调光子信号。
其中，所述根据所述总控信号中的原始显示子信号和预设的子显示模组的显示面板分辨率信息，将所述原始局部调光子信号转换为适应目标局部调光区域的目标局部调光子信号，包括：
根据所述原始显示子信号和预设的子显示模组的显示面板分辨率信息，确定出原始局部调光区域放大至所述目标局部调光区域所需的第一放大倍数或原始局部调光区域缩小至所述目标局部调光区域所需的第一缩小倍数；
根据所述第一放大倍数或第一缩小倍数，将所述原始局部调光子信号转换为适应目标局部调光区域的目标局部调光子信号。
其中，所述根据所述原始显示子信号和预设的子显示模组的显示面板分辨率信息，确定出原始局部调光区域放大至所述目标局部调光区域所需的第一放大倍数或原始局部调光区域缩小至所述目标局部调光区域所需的第一缩小倍数，包括：
将预设的子显示模组的显示面板分辨率信息所表征的所述子显示模组的显示面板的最大像素显示区域作为目标显示区域，确定出原始显示区域放大至所述目标显示区域所需的第二放大倍数；
将所述第二放大倍数作为所述第一放大倍数；或
将预设的子显示模组的显示面板分辨率信息所表征的所述子显示模组的显示面板的最小像素显示区域作为目标显示区域，确定出原始显示区域缩小至所述目标显示区域所需的第二缩小倍数；
将所述第二缩小倍数作为所述第一缩小倍数。
其中，本发明的控制方法还包括：
根据所述总控信号中的原始显示子信号，确定出适应目标显示区域的目标显示子信号；
将所述目标显示子信号发送至显示驱动器，使得所述显示驱动器驱动子显示模组的显示面板在所述目标显示区域内显示图像。
其中，所述在控制系统中各子控制电路接收总控信号之后，还包括：
根据预设的分区信息确定出原始显示子信号；以及
将所述总控信号中与所述原始显示子信号关联的部分原始局部调光信号确定为所述原始局部调光子信号。
其中，所述控制系统中子控制电路接收总控信号，包括：
所述子控制电路中的所述信号控制器接收上一个所述子控制电路中所述信号控制器或所述总控器输出的所述总控信号后，将所述总控信号输出至下一个所述子控制电路中的所述信号控制器。
附图说明
为了更清楚地说明本公开实施例中的技术方案，下面将对本公开实施例描述中所需要使用的附图作简单地介绍。其中，
图1为本公开实施例提供的一种液晶拼接显示模组的控制系统的结构示意图；
图2为本公开实施例提供的一种液晶拼接显示模组的控制系统中背光驱动电路与背光模组连接状态示意图；
图3为本公开实施例提供的一种液晶拼接显示模组的结构示意图；
图4为本公开实施例提供的一种液晶拼接显示模组中显示模组与子显示模组的结构示意图；
图5为本公开实施例提供的一种液晶拼接显示模组的控制方法的流程示意图；
图6为本公开实施例提供的另一种液晶拼接显示模组的控制方法的流程示意图；
图中：
1-总控器；2-子控制电路；21-信号控制器；
22-背光驱动电路；221-背光驱动器；222-背光电源；23-显示驱动器；
3-背光模组；31-发光单元；311-发光体；312-开关器件；
4-显示模组；41-子显示模组。
具体实施方式
下面详细描述本公开的实施例，所述实施例的示例在附图中示出，其中自始至终相同或类似的标号表示相同或类似的元件或具有相同或类似功能的元件。下面通过参考附图描述的实施例是示例性的，仅用于解释本公开，而 不能解释为对本公开的限制。
本技术领域技术人员可以理解，除非特意声明，这里使用的单数形式“一”、“一个”、“所述”和“该”也可包括复数形式。应该进一步理解的是，本公开的说明书中使用的措辞“包括”是指存在所述特征、整数、步骤、操作、元件和/或组件，但是并不排除存在或添加一个或多个其他特征、整数、步骤、操作、元件、组件和/或它们的组。应该理解，当我们称元件被“连接”或“耦接”到另一元件时，它可以直接连接或耦接到其他元件，或者也可以存在中间元件。此外，这里使用的“连接”或“耦接”可以包括无线连接或无线耦接。这里使用的措辞“和/或”包括一个或更多个相关联的列出项的全部或任一单元和全部组合。
为使本公开的目的、技术方案和优点更加清楚，下面将结合附图对本公开实施方式作进一步地详细描述。下面以具体地实施例对本公开的技术方案以及本公开的技术方案如何解决上述技术问题进行详细说明。下面这几个具体的实施例可以相互结合，对于相同或相似的概念或过程可能在某些实施例中不再赘述。下面将结合附图，对本公开的实施例进行描述。
在本公开实施例中，局部调光(Local Dimming)是指，将背光模组分成多子区域，在作业时，根据相应子区域对应显示面板上图像的灰度，来调整背光的明暗度，以此达到节能、增强画质效果的技术。
为了增加对比度以及提升画质，液晶拼接显示模组通常都具备局部调光功能，局部调光功能可以调节液晶拼接显示模组中各单位区域的背光亮度。相关技术中，显示装置中的显示驱动器接收主控制器发送的总控信号，并执行局部调光的计算工作，相关的计算信息再经过处理器转换计算后发送至背光驱动电路，由背光驱动电路控制对应的发光单元的发光状态，实现液晶拼接显示模组局部调光。
在工作过程中，当显示模组显示一个图像时，需要将总控器输出的总控信号中显示信号表征的图像分割成多个图像块，每个子显示模组的显示面板分别显示其中一个图像块。然而，总控信号中显示信号所表征的图像的分辨率与液晶拼接显示模组的分辨率可能不一致，此时便需要将每个图像块进行放大，使得各图像块的分辨率分别与对应的显示装置的分辨率相适配。
如图4所示，假设显示信号所表征的图像(图4中虚线框表示图像)的分辨率为1920*1080，则每个图像块的分辨率为960*540。液晶拼接显示模组的分辨率为1920*1080，若图像块不进行放大，则每个图像块在对应的子显示模组的显示面板上只占四分之一，用户在观看图像时存在观看区域小，观看不便等问题。因此，需要将显示信号进行转换，使得转换后的显示信号所表征的图像的分辨率，与对应的子显示模组的分辨率相适应。
由于图像在子显示模组的显示面板上所占的区域发生了变化，因此背光模组上执行局部调光的子区域数量也需要做相应的调整，即还需要对总控信号中局部调光信号进行转换，使得背光驱动电路能够根据转换后的局部调光信号驱动背光模组中对应区域内的发光单元执行局部调光。
然而，相关技术中，局部调光信号的转换工作需要显示驱动器执行，并将转换后的局部调光信号发送至背光驱动电路，具备局部调光信号转换功能的显示驱动器价格昂贵，导致液晶拼接显示模组整体的成本较高。
下面对本公开实施例涉及的几个名词进行介绍和解释：
原始显示子信号，未经转换的显示信号中对应一个子显示模组的显示子信号。
目标显示子信号，转换后的显示信号中对应一个子显示模组的显示子信号。
原始显示区域是指，子显示模组的显示面板中用来显示原始显示子信号所表征的图像的区域。
目标显示区域是指，子显示模组的显示面板中用来显示目标显示子信号所表征的图像的区域。
原始局部调光子信号，未经转换的局部调光信号中对应一个子显示模组的局部调光子信号。
目标局部调光子信号，转换后的局部调光信号中对应一个子显示模组的局部调光子信号。
原始局部调光区域，在原始局部调光子信号的控制下，背光模组中用来执行局部调光的各发光单元所在的区域。
目标局部调光区域，在目标局部调光子信号的控制下，背光模组中用来 执行局部调光的各发光单元所在的区域。
图1为本公开实施例提供的一种液晶拼接显示模组的控制系统的结构示意图，如图1所示，包括：总控器1以及多个子控制电路2；总控器用于输出总控信号，所述总控信号包括原始局部调光子信号和原始显示子信号。子控制电路2包括信号控制器21和背光驱动电路22，信号控制器21与背光驱动电路22电连接，背光驱动电路22用于与液晶拼接显示模组中背光模组3的每个发光单元31电连接。
信号控制器21，与总控器1电连接，用于接收总控器1输出的总控信号，根据总控信号中的原始局部调光子信号，确定目标局部调光子信号；将目标局部调光子信号发送至背光驱动电路22，使得背光驱动电路22驱动目标局部调光区域内的发光单元31执行局部调光。
其中，本公开的总控器为核心系统级芯片(System on Chip，SOC)；总控器输出的总控信号，不仅限于原始局部调光子信号和/或原始显示子信号，还包括用于调控原始局部调光子信号和/或原始显示子信号的控制信号
其中，本公开的显示驱动器为时序控制器(Timing Controler，TCON)，时序控制器能够为提供可靠的时序控制信号，以控制液晶显示屏稳定显示。
在本公开实施例提供的液晶拼接显示模组的控制系统中，由于信号控制器21本身具备逻辑运算功能，因此可以利用信号控制器21来根据总控信号中的原始局部调光子信号确定出适应目标局部调光区域的目标局部调光子信号，并将目标局部调光子信号直接发送给背光驱动电路22。也就是说，信号控制器21可以代替相关技术中的显示驱动器23的部分功能，显示驱动器23可以无需具备转换局部调光信号的功能，因此显示驱动器23可以选用功能简单、价格低廉的型号，从而有效地降低液晶拼接显示模组的成本。
另外，由于各个信号控制器21能够在总控信号识别出各自对应原始信号(如原始局部调光子信号或原始显示子信号等)，因此控制系统不需要设置分屏器来分割总控信号，这进一步降低了液晶拼接显示模组的成本。
可选地，在本公开实施例提供的液晶拼接显示模组的控制系统中，背光驱动电路22包括背光驱动器221和背光电源222。信号控制器21与背光驱动器221电连接，背光驱动器221和背光电源222用于与每个发光单元31组 成回路。
图2为本公开实施例提供的一种液晶拼接显示模组的控制系统中背光驱动电路与背光模组连接状态示意图，以图2为例，发光单元31包括发光体311和开关器件312，发光体311和开关器件312串联。背光驱动器221的局部调光信号输入端与信号控制器21电连接，背光驱动器221的反馈信号输出端与背光电源222的反馈信号输入端电连接。背光电源222的电源输出端与每个发光单元31中的发光体311的输入端电连接，背光驱动器221的控制信号输出端与每个发光单元31中的开关器件312电连接。
发光体311可以选用发光二极管，在图2中，发光单元31为3个串联发光二极管。开关器件312可以选用MOS(Metal Oxide Semiconductor)管，此时背光驱动器221的控制信号输出端与开关器件312栅极电连接。
背光驱动器221的控制信号输出端输出高位电压时，开关器件312导通，使得发光体311发光；背光驱动器221的控制信号输出端输出低位电压时，开关器件312断开，发光体311熄灭。随着开关器件312导通与断开，回路中形成脉冲宽度调制(Pulse Width Modulation，PWM)信号，背光驱动器221根据接收到的目标局部调光子信号，以PWM信号调节的方式实现局部调光。
可选地，在本公开实施例提供的液晶拼接显示模组的控制系统中，总控器与子控制电路电连接，总控器1和多个子控制电路2中的信号控制器21依次串联。每个当前子控制电路2中的信号控制器21用于接收上一个子控制电路2中信号控制器21或总控器1输出的总控信号后，将总控信号输出至下一个子控制电路2中的信号控制器21。
需要说明的是，子控制电路与总控器之间可以是直接电连接，也可以是间接电连接。
具体地，如图1所示，位于首位的子控制电路2中的信号控制器21接收总控器1输出的总控信号，再将总控信号输出至下一个子控制电路2中的信号控制器21；位于其他位置的子控制电路2中的信号控制器21接收上一个子控制电路2中信号控制器21输出的总控信号，再将总控信号输出至下一个子控制电路2中的信号控制器21。应当说明的是，信号控制器21之间输出和接收的总控信号的原始来源均为总控器1，各个信号控制器21接收到的总 控信号的内容一致。
在本公开实施例提供的液晶拼接显示模组的控制系统中，总控器1输出的总控信号可以由上一个信号控制器21发送给下一个信号控制器21，显著地降低了总控信号的衰减，保证了总控信号传输过程的稳定性。
可选地，在本公开实施例提供的液晶拼接显示模组的控制系统中，子控制电路2还包括显示驱动器23，显示驱动器23用于与子显示模组的显示面板电连接。
信号控制器21，与显示驱动器23电连接，用于根据总控信号中的原始显示子信号，确定出适应目标显示区域的目标显示子信号；将目标显示子信号发送至显示驱动器23，使得显示驱动器23驱动子显示模组的显示面板在目标显示区域内显示图像。
可选地，同总控器1类似，信号控制器21也可以包括系统级芯片(System on Chip，SOC)，SOC将微处理器、模拟IP核、数字IP核和存储器(或片外存储控制接口)集成在单一芯片，具有较强的运算能力。
基于同一发明构思，本公开实施例还提供了一种液晶拼接显示模组，如图3所示，为本公开本公开实施例提供的一种液晶拼接显示模组的结构示意图；包括多个子显示模组以及本公开实施例提供的控制系统，各子显示模组与控制系统中的各子控制电路对应。
其中，子显示模组包括背光模组，背光模组包括至少一个发光单元。
其中，背光模组与背光驱动电路电连接。
其中，背光模组与背光驱动电路的背光驱动器和背光电源组成回路。
以图2为例，背光模组3包括多个发光单元31。发光单元31括发光体311和开关器件312，发光体311和开关器件312串联。背光驱动器221的局部调光信号输入端与信号控制器21电连接，背光驱动器221的反馈信号输出端与背光电源222的反馈信号输入端电连接。背光电源222的电源输出端与每个发光单元31电连接，每个发光单元中的发光体311串联连接，背光驱动器221的控制信号输出端与每个发光单元31中的开关器件312电连接。开关器件312可以选用MOS(Metal Oxide Semiconductor)管，因此背光驱动器 221的控制信号输出端与开关器件312栅极电连接。
子显示模组41还包括显示面板，子控制电路2中的显示驱动器23与同属于一个子显示模组41的显示面板电连接。显示驱动器23和子显示模组的显示面板的具体连接方式可以参考本领域的相关技术，此处不再赘述。
其中，图4为本公开实施例提供的一种液晶拼接显示模组中显示模组与子显示模组的结构示意图应当说明的是，一个液晶拼接显示模组可以包括多个子显示模组。图4所示的2*2形式的液晶拼接显示模组4包括4个子显示模组41。
本公开实施例提供的技术方案带来的有益效果是：
在本公开实施例提供的液晶拼接背光模组的控制系统中，由于信号控制器本身具备逻辑运算功能，因此可以利用信号控制器来根据总控信号中的原始局部调光子信号确定出适应目标局部调光区域的目标局部调光子信号，并将目标局部调光子信号直接发送给背光驱动电路。也就是说，信号控制器可以代替相关技术中的显示驱动器的部分功能，显示驱动器可以无需具备转换局部调光信号的功能，因此显示驱动器可以选用功能简单、价格低廉的型号，从而有效地降低液晶拼接显示模组的成本。
另外，由于各个信号控制器能够在总控信号识别出各自对应原始信号(如原始局部调光子信号或原始显示子信号等)，因此控制系统不需要设置分屏器来分割总控信号，这进一步降低了液晶拼接显示模组的成本。
基于同一发明构思，本公开实施例还提供了一种液晶拼接显示模组的控制方法，基于本公开实施例提供的液晶拼接显示模组的控制系统实现，该方法的流程示意图如图5所示，包括：
S101：控制系统中各子控制电路2接收总控信号。
控制系统中的总控器1输出总控信号，每个子控制电路2中的信号控制器21接收该总控信号。如图1所示，在本公开实施例提供的液晶拼接显示模组的控制系统中，由于总控器1和多个子控制电路2中的信号控制器21依次串联，因此，可选地，控制系统中每个子控制电路2接收总控信号，包括：子控制电路2中的信号控制器21用于接收上一个子控制电路2中信号控制器21或总控器1输出的总控信号后，将总控信号输出至下一个子控制电路2 中的信号控制器21。
在本公开实施例提供的液晶拼接显示模组的控制系统中，总控器1输出总控信号包括原始显示信号、原始局部调光信号和原始显示控制信号等。每个子控制电路2中信号控制器21接收到的总控信号的内容是相同的，因此每个信号控制器21还需要在总控信号中识别其自身对应的部分信号，可选地，在控制系统中每个子控制电路2接收总控信号之后，还包括：根据预设的分区信息确定出原始显示子信号；以及将总控信号中与原始显示子信号关联的部分原始局部调光信号确定为原始局部调光子信号。
S102：根据总控信号中的原始局部调光子信号，确定目标局部调光子信号。
在本步骤中，信号控制器21需要确认原始局部调光子信号是否需要进行转换，若不需要转换，则将原始局部调光子信号确定为适应目标局部调光区域的目标局部调光子信号；若需要转换，则将转换后的原始局部调光子信号确定为适应目标局部调光区域的目标局部调光子信号。
应当说明的是，确定原始局部调光子信号是否需要进行转换的判断条件可以根据实际需要而定。例如，可以根据原始显示子信号所表征的图像块在对应的子显示模组的显示面板上所占的区域是否达到预设值，来判断原始局部调光子信号是否需要进行转换。一般来说，通常期望原始显示子信号所表征的图像块能够占满对应的子显示模组的显示面板。
当原始局部调光子信号需要进行转换时，可选地，根据总控信号中的原始局部调光子信号，确定出适应目标局部调光区域的目标局部调光子信号，包括：根据总控信号中的原始显示子信号和预设的子显示模组的显示面板分辨率信息，将原始局部调光子信号转换为适应目标局部调光区域的目标局部调光子信号。
S103：将目标局部调光子信号发送至背光驱动电路22背光驱动电路。
可选地，本公开实施例提供的液晶拼接显示模组的控制方法还包括：根据总控信号中的原始显示子信号，确定出适应目标显示区域的目标显示子信号；将目标显示子信号发送至显示驱动器23，使得显示驱动器23驱动子显示模组的显示面板在目标显示区域内显示图像。
基于同一发明构思，本公开实施例还提供了另一种液晶拼接显示模组的控制方法，基于本公开实施例提供的液晶拼接显示模组的控制系统实现，该方法的流程示意图如图6所示，包括：
S201：子控制电路2中的信号控制器21接收上一个子控制电路2中信号控制器21或总控器1输出的总控信号后，将总控信号输出至下一个子控制电路2中的信号控制器21。
如图1所示，在本公开实施例提供的液晶拼接显示模组的控制系统中，总控器1和多个子控制电路2中的信号控制器21依次串联。因此，位于首位的子控制电路2中的信号控制器21接收总控器1输出的总控信号，再将总控信号输出至下一个子控制电路2中的信号控制器21；位于其他位置的子控制电路2中的信号控制器21接收上一个子控制电路2中信号控制器21输出的总控信号，再将总控信号输出至下一个子控制电路2中的信号控制器21。
应当说明的是，信号控制器21之间输出和接收的总控信号的原始来源均为总控器1，各个信号控制器21接收到的总控信号的内容一致。
S202：根据预设的分区信息确定出原始显示子信号；将总控信号中与原始显示子信号关联的部分原始局部调光信号确定为原始局部调光子信号。
应当说明的是，分区信息可以在烧录信号控制器21的系统时储存在信号控制器21中。分区信息至少包括分区数量、分区与子显示模组41之间的对应关系。
总控信号中原始显示信号所表征的图像期望分割成的图像块的数量，与分区数量一致。例如，分区数量为4，则表示原始显示信号所表征的图像将被分割成的4个图像块。分区与子显示模组41之间可以是一一对应的关系，例如2*2形式的液晶拼接显示模组显示模组4，则分区数量可以为4，每个子显示模组41用于显示对应的图像块。
本领域的技术人员可以理解，各分区与各原始显示子信号所表征的图像块是对应的，信号控制器21在获知对应的分区时，即可根据原始显示信号所表征的图像的分辨率信息确定出原始显示子信号。
例如，某个信号控制器21与第一分区对应，而第一分区与第一图像块对 应。原始显示信号所表征的图像的分辨率为1920*1080，则第一图像块为图像中第1列至第960列像素点与第1行至第540行像素点的重叠区域，原始显示信号与上述第一图像模块对应的数据信息即信号控制器21所需要的原始显示子信号。基于上述原理，其他信号控制器21也可以确定出所需要的原始显示子信号。
在总控信号中，原始显示信号与原始局部调光信号是关联的，当信号控制器21确定出所需要的原始显示子信号后，即可将总控信号与该原始显示子信号关联的部分原始局部调光信号确定为原始局部调光子信号。
应当说明的是，在执行完成S202后，可以同时执行S203和S205，当然，S204和S205的开始执行起始时刻也可以存在时间差，只需要保证子显示模组的显示面板上显示图像的动作与对应的局部调光动作能够同步进行即可。
S203：根据总控信号中的原始显示子信号和预设的子显示模组的显示面板分辨率信息，将原始局部调光子信号转换为适应目标局部调光区域的目标局部调光子信号。
可选地，根据总控信号中的原始显示子信号和预设的子显示模组的显示面板分辨率信息，将原始局部调光子信号转换为适应目标局部调光区域的目标局部调光子信号，包括：根据原始显示子信号和预设的子显示模组的显示面板分辨率信息，确定出原始局部调光区域放大至目标局部调光区域所需的第一放大倍数或原始局部调光区域缩小至所述目标局部调光区域所需的第一缩小倍数；根据第一放大倍数或第一缩小倍数，将原始局部调光子信号转换为适应目标局部调光区域的目标局部调光子信号。
可选地，根据原始显示子信号和预设的子显示模组的显示面板分辨率信息，确定出原始局部调光区域放大至目标局部调光区域所需的第一放大倍数，包括：将预设的子显示模组的显示面板分辨率信息所表征的子显示模组的显示面板的最大像素显示区域作为目标显示区域，确定出原始显示区域放大至目标显示区域所需的第二放大倍数；将第二放大倍数作为第一放大倍数；或
将预设的子显示模组的显示面板分辨率信息所表征的所述子显示模组的显示面板的最小像素显示区域作为目标显示区域，确定出原始显示区域缩小至所述目标显示区域所需的第二缩小倍数；
将所述第二缩小倍数作为所述第一缩小倍数。
其中，确定第二放大倍数的具体步骤可以为：
(a)计算出子显示模组的显示面板的最大像素显示区域中的像素点行数与原始显示区域的像素点行数之间的第一比值，以及子显示模组的显示面板的最大像素显示区域中的像素点像素点列数与原始显示区域的列数之间的第二比值。
以分辨率为1920*1080的子显示模组的显示面板为例，该子显示模组的显示面板的最大像素显示区域中的像素点行数为1920，像素点列数为1080。
原始显示区域的行数和列数，可以根据原始显示子信号所表征的图像块的分辨率确定出。例如，原始显示信号所表征的图像的分辨率为1920*1080，且原始显示子信号所表征的图像块占原始显示信号所表征的图像的四分之一，则原始显示子信号所表征的图像块的分辨率为960*540。原始显示区域的像素点行数为960，像素点列数为540。第一比值和第二比值均为2。
(b)根据第一比值和所述第二比值，确定出原始显示区域放大至目标显示区域所需的第二放大倍数。
在本公开实施例中，将原始显示区域放大至目标显示区域时，原始显示区域的长度和宽度方向均需要放大两倍，第二放大倍数为4。
还应当说明的是，若第一比值、第二比值或第二放大倍数为非整数时，第一比值、第二比值或第二放大倍数的取值可以做模糊处理。
以分辨率为1920*1080的子显示模组的显示面板为例，该子显示模组的显示面板的最大像素显示区域中的像素点行数为1920，像素点列数为1080。
原始显示信号所表征的图像的分辨率为1600*1200，原始显示子信号所表征的图像块的分辨率为800*600。
第一比值计算时，用1920除以800，商为2，余数为320，做模糊处理后，第一比值为2；第二比值计算时，用1080除以600，商为1，余数为480，做模糊处理后，第一比值为1。
根据第一比值和第二比值，确定出原始显示区域放大至目标显示区域所需的第二放大倍数，将第一比值乘以第二比值得到第二放大倍数为2。
在本公开实施例中，将原始显示区域放大至目标显示区域时，原始显示 区域的长度方向需要放大两倍，宽度方向需要放大一倍，第二放大倍数为2。
本领域的技术人员可以理解，在执行完S203时即可确定出第二放大倍数，因此在执行S204可以不必重复执行计算第二放大倍数的步骤，在S204直接将S203中计算出的第二放大倍数作为第一放大倍数。
其中，确定第二缩小倍数的计算方法与确定第二放大倍数的计算方法类似，此处不再赘述。在执行完成S203后，开始执行S204。
S204：将目标局部调光子信号发送至背光驱动电路22，使得背光驱动电路22驱动背光模组3的目标局部调光区域内的发光单元31执行局部调光。
背光模组3的目标局部调光区域与子显示模组的显示面板在目标显示区域对应，在本公开实施例中，目标显示区域可以是子显示模组的显示面板的最大像素显示区域，则背光模组3的目标局部调光区域为包括了背光模组3中所有发光单元31的区域。
背光驱动器221的控制信号输出端输出高位电压时，开关器件312导通，使得发光体311发光；背光驱动器221的控制信号输出端输出低位电压时，开关器件312断开，发光体311熄灭。随着开关器件312导通与断开，回路中形成脉冲宽度调制(Pulse Width Modulation，PWM)信号，背光驱动器221根据接收到的目标局部调光子信号，以PWM信号调节的方式实现局部调光。背光驱动电路22驱动背光模组3的目标局部调光区域内的发光单元31执行局部调光其他具体步骤，可以参考本领域的相关技术，此处不再赘述。
S205：根据总控信号中的原始显示子信号，确定出适应目标显示区域的目标显示子信号。
在本步骤中，信号控制器21需要确认原始显示子信号是否需要进行转换，若不需要转换，则将原始显示子信号确定为适应目标局部调光区域的目标局部调光子信号；若需要转换，则将转换后的原始显示子信号确定为适应目标显示区域的目标显示子信号。
应当说明的是，确定原始显示子信号是否需要进行转换的判断条件可以根据实际需要而定。例如，可以根据原始显示子信号所表征的图像块在对应的子显示模组的显示面板上所占的区域是否达到预设值，来判断原始局部调光子信号是否需要进行转换。一般来说，通常期望原始显示子信号所表征的 图像块能够占满对应的子显示模组的显示面板。
当原始显示子信号需要进行转换时，将预设的子显示模组的显示面板分辨率信息所表征的子显示模组的显示面板的最大像素显示区域作为目标显示区域，确定出原始显示区域放大至所述目标显示区域所需的第二放大倍数；根据所述第二放大倍数，将原始显示子信号转换为适应目标显示区域的目标显示子信号。
S205中确定第二放大倍数的具体步骤与S203确定第二放大倍数的具体步骤一致，此处不再赘述。
在执行完成S205后，开始执行S206。
S206：将目标显示子信号发送至显示驱动器23，使得显示驱动器23驱动子显示模组的显示面板在目标显示区域内显示图像。
子显示模组的显示面板在目标显示区域的具体范围可以根据实际需要而定，在本公开实施例中，目标显示区域可以是子显示模组的显示面板的最大像素显示区域。显示驱动器23驱动子显示模组的显示面板在目标显示区域内显示图像的原理和过程，可以参考本领域的相关技术，此处不再赘述。
应用本公开实施例，至少可以实现如下技术效果：
1、在本公开实施例提供的液晶拼接显示模组的控制系统中，由于信号控制器本身具备逻辑运算功能，因此可以利用信号控制器来根据总控信号中的原始局部调光子信号确定出适应目标局部调光区域的目标局部调光子信号，并将目标局部调光子信号直接发送给背光驱动电路。也就是说，信号控制器可以代替相关技术中的显示驱动器的部分功能，显示驱动器可以无需具备转换局部调光信号的功能，因此显示驱动器可以选用功能简单、价格低廉的型号，从而有效地降低液晶拼接显示模组的成本。
另外，由于各个信号控制器能够在总控信号识别出各自对应原始信号(如原始局部调光子信号或原始显示子信号等)，因此控制系统不需要设置分屏器来分割总控信号，这进一步降低了液晶拼接显示模组的成本。
2、在本公开实施例提供的液晶拼接显示模组的控制系统中，总控器输出的总控信号可以由上一个信号控制器发送给下一个信号控制器，显著地降低 了总控信号的衰减，保证了总控信号传输过程的稳定性。
本技术领域技术人员可以理解，本公开中已经讨论过的各种操作、方法、流程中的步骤、措施、方案可以被交替、更改、组合或删除。进一步地，具有本公开中已经讨论过的各种操作、方法、流程中的其他步骤、措施、方案也可以被交替、更改、重排、分解、组合或删除。进一步地，相关技术中的具有与本公开中公开的各种操作、方法、流程中的步骤、措施、方案也可以被交替、更改、重排、分解、组合或删除。
在本公开的描述中，需要理解的是，术语“中心”、“上”、“下”、“前”、“后”、“左”、“右”、“竖直”、“水平”、“顶”、“底”、“内”、“外”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本公开和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本公开的限制。
术语“第一”、“第二”仅用于描述目的，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量。由此，限定有“第一”、“第二”的特征可以明示或者隐含地包括一个或者更多个该特征。在本公开的描述中，除非另有说明，“多个”的含义是两个或两个及以上。
在本公开的描述中，需要说明的是，除非另有明确的规定和限定，术语“安装”、“相连”、“连接”应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或一体地连接；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通。对于本领域的普通技术人员而言，可以具体情况理解上述术语在本公开中的具体含义。
在本说明书的描述中，具体特征、结构、材料或者特点可以在任何的一个或多个实施例或示例中以合适的方式结合。
应该理解的是，虽然附图的流程图中的各个步骤按照箭头的指示依次显示，但是这些步骤并不是必然按照箭头指示的顺序依次执行。除非本文中有明确的说明，这些步骤的执行并没有严格的顺序限制，其可以以其他的顺序执行。而且，附图的流程图中的至少一部分步骤可以包括多个子步骤或者多个阶段，这些子步骤或者阶段并不必然是在同一时刻执行完成，而是可以在不同的时刻执行，其执行顺序也不必然是依次进行，而是可以与其他步骤或 者其他步骤的子步骤或者阶段的至少一部分轮流或者交替地执行。
以上所述仅是本公开的部分实施方式，应当指出，对于本技术领域的普通技术人员来说，在不脱离本公开原理的前提下，还可以做出若干改进和润饰，这些改进和润饰也应视为本公开的保护范围。

Claims (16)

  1. 一种液晶拼接显示模组的控制系统，包括：总控器以及多个子控制电路；
    所述总控器用于输出总控信号，所述总控信号包括原始局部调光子信号和/或原始显示子信号；
    所述子控制电路包括信号控制器和背光驱动电路；所述信号控制器与所述背光驱动电路电连接，所述背光驱动电路用于与液晶拼接显示模组中背光模组的发光单元电连接；
    所述信号控制器，与所述总控器电连接，用于接收所述总控器输出的总控信号，根据所述总控信号中的原始局部调光子信号，确定目标局部调光子信号，将所述目标局部调光子信号发送至背光驱动电路。
  2. 根据权利要求1所述的控制系统，其中，所述背光驱动电路包括背光驱动器和背光电源；
    所述背光驱动器，与所述信号控制器电连接，所述背光驱动器和背光电源用于与所述背光模组的发光单元组成回路。
  3. 根据权利要求1所述的控制系统，其中，所述总控器和多个所述子控制电路中的所述信号控制器依次串联；
    所述子控制电路中的所述信号控制器用于接收上一个所述子控制电路中所述信号控制器输出的所述总控信号或所述总控器输出的所述总控信号，将所述总控信号输出至下一个所述子控制电路中的所述信号控制器。
  4. 根据权利要求1所述的控制系统，其中，所述子控制电路还包括显示驱动器；显示驱动器用于与液晶拼接显示模组中子显示模组的显示面板电连接；
    所述显示驱动器，与所述信号控制器电连接，用于根据所述总控信号中的所述原始显示子信号，确定出适应目标显示区域的目标显示子信号；将所述目标显示子信号发送至显示驱动器，使得所述显示驱动器驱动子显示模组的显示面板在所述目标显示区域内显示图像。
  5. 根据权利要求1所述的控制系统，其中，所述信号控制器为系统级芯 片。
  6. 一种液晶拼接显示模组，包括多个子显示模组、以及如权利要求1-5中任一项所述的控制系统；所述各子显示模组与所述控制系统中的各子控制电路对应。
  7. 根据权利要求6所述的液晶拼接显示模组，其中，所述子显示模组包括背光模组，所述背光模组包括至少一个发光单元。
  8. 根据权利要求7所述的液晶拼接显示模组，其中，所述背光模组与所述背光驱动电路电连接。
  9. 根据权利要求8所述的液晶拼接显示模组，其中，所述背光模组与所述背光驱动电路的所述背光驱动器和所述背光电源组成回路。
  10. 一种液晶拼接显示模组的控制方法，基于如权利要求1-5中任一项所述的控制系统实现，包括：
    所述控制系统中各子控制电路接收总控信号；
    根据所述总控信号中的原始局部调光子信号，确定目标局部调光子信号；
    将所述目标局部调光子信号发送至背光驱动电路背光驱动电路。
  11. 根据权利要求10所述的控制方法，其中，所述根据所述总控信号中的原始局部调光子信号，确定目标局部调光子信号，包括：
    根据所述总控信号中的原始显示子信号和预设的子显示模组的显示面板分辨率信息，将所述原始局部调光子信号转换为适应目标局部调光区域的目标局部调光子信号。
  12. 根据权利要求11所述的控制方法，其中，所述根据所述总控信号中的原始显示子信号和预设的子显示模组的显示面板分辨率信息，将所述原始局部调光子信号转换为适应目标局部调光区域的目标局部调光子信号，包括：
    根据所述原始显示子信号和预设的子显示模组的显示面板分辨率信息，确定出原始局部调光区域放大至所述目标局部调光区域所需的第一放大倍数或原始局部调光区域缩小至所述目标局部调光区域所需的第一缩小倍数；
    根据所述第一放大倍数或第一缩小倍数，将所述原始局部调光子信号转换为适应目标局部调光区域的目标局部调光子信号。
  13. 根据权利要求12所述的控制方法，其中，所述根据所述原始显示子 信号和预设的子显示模组的显示面板分辨率信息，确定出原始局部调光区域放大至所述目标局部调光区域所需的第一放大倍数或原始局部调光区域缩小至所述目标局部调光区域所需的第一缩小倍数，包括：
    将预设的子显示模组的显示面板分辨率信息所表征的所述子显示模组的显示面板的最大像素显示区域作为目标显示区域，确定出原始显示区域放大至所述目标显示区域所需的第二放大倍数；
    将所述第二放大倍数作为所述第一放大倍数；或
    将预设的子显示模组的显示面板分辨率信息所表征的所述子显示模组的显示面板的最小像素显示区域作为目标显示区域，确定出原始显示区域缩小至所述目标显示区域所需的第二缩小倍数；
    将所述第二缩小倍数作为所述第一缩小倍数。
  14. 根据权利要求10所述的控制方法，还包括：
    根据所述总控信号中的原始显示子信号，确定出适应目标显示区域的目标显示子信号；
    将所述目标显示子信号发送至显示驱动器，使得所述显示驱动器驱动子显示模组的显示面板在所述目标显示区域内显示图像。
  15. 根据权利要求10所述的控制方法，其中，所述在控制系统中各子控制电路接收总控信号之后，还包括：
    根据预设的分区信息确定出原始显示子信号；以及
    将所述总控信号中与所述原始显示子信号关联的部分原始局部调光信号确定为所述原始局部调光子信号。
  16. 根据权利要求10所述控制方法，其中，所述控制系统中子控制电路接收总控信号，包括：
    所述子控制电路中的所述信号控制器接收上一个所述子控制电路中所述信号控制器或所述总控器输出的所述总控信号后，将所述总控信号输出至下一个所述子控制电路中的所述信号控制器。
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