CN113053261A - Splicing display device and splicing display method - Google Patents
Splicing display device and splicing display method Download PDFInfo
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- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
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- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
- G09F9/302—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements characterised by the form or geometrical disposition of the individual elements
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- 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
- G09G3/22—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 using controlled light sources
- G09G3/30—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 using controlled light sources using electroluminescent panels
- G09G3/32—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 using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
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- 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
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- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
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Abstract
The embodiment of the invention discloses a splicing display device and a splicing display method. In one embodiment, the tiled display device comprises a main control module, at least two liquid crystal display modules and at least one LED display module arranged at the spliced position of the at least two liquid crystal display modules; and the main control module is used for dividing the received picture signal into sub-picture signals corresponding to the picture partitions of each display module and sending the sub-picture signals to the display driving modules of the corresponding display modules. The splicing display device of the embodiment can effectively weaken the splicing effect of the splicing display device, optimize the picture display effect of the splicing display device and achieve the seamless splicing display effect.
Description
Technical Field
The invention relates to the technical field of display. And more particularly, to a tiled display apparatus and a tiled display method.
Background
With the development of the electronic industry, the demand of various super-large-sized display devices is increasing day by day, and the application of the super-large-sized display devices in various scenes is becoming more and more extensive, so that the tiled display devices such as lcd (liquid Crystal display) tiled display devices are also gaining more and more attention. The splicing display device can splice a plurality of LCD display screens to form an oversized display screen for picture display according to actual display requirements, and has the advantages of clear picture display, high flexibility and the like.
At present, due to the requirements of a driving circuit and a production process, a frame with a certain width needs to be reserved at the periphery of a display area of an existing LCD display screen to accommodate the driving circuit and other components. And when a plurality of current LCD display screens splice and form tiled display device, the frame of adjacent LCD display screen can form the piece to destroy tiled display device's display quality's continuity and integrality, reduce tiled display device's display effect.
Disclosure of Invention
The invention aims to provide a tiled display device and a tiled display method, which are used for solving at least one of the problems in the prior art.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention provides a spliced display device, which comprises a main control module, at least two liquid crystal display modules and at least one LED display module arranged at the spliced position of the at least two liquid crystal display modules;
and the main control module is used for dividing the received picture signal into sub-picture signals corresponding to the picture partitions of each display module and sending the sub-picture signals to the display driving modules of the corresponding display modules.
The spliced display device provided by the first aspect of the invention is provided with the liquid crystal display modules and the LED display modules, wherein the LED display modules are arranged at the spliced positions between the liquid crystal display modules, so that the LED display modules are used as display units to cover the frames (namely, spliced positions) of the liquid crystal display modules, and sub-picture signals are respectively sent to the liquid crystal display modules and the LED display modules through the main control module to be displayed together, namely, the LED display modules perform picture compensation on the spliced positions between the liquid crystal display modules, so that the spliced positions of the original spliced display device can also perform picture display, the spliced effect of the spliced display device can be effectively weakened, the picture display effect of the spliced display device is optimized, the display effect of seamless splicing of the spliced display device is achieved, the effect of visual seamless splicing is realized, and the watching comfort level of a user is improved.
Optionally, the main control module is further configured to generate a local dimming signal according to the received picture signal, and send the local dimming signal to the backlight driving module of the liquid crystal display module.
In the optional embodiment, the local dimming signal is generated according to the picture signal, and the backlight driving module controls the light emitting state of the corresponding light emitting unit according to the local dimming signal, so that the backlight brightness of each unit area in each display unit of the liquid crystal display module is adjusted, the backlight power consumption is saved, and the picture display contrast and the picture quality of the tiled display device are improved.
Optionally, the main control module communicates with the display driving module of the LED display module and the backlight driving module of the liquid crystal display module through an SPI protocol.
The master control module of the optional embodiment is respectively communicated with the display driving module of the LED display module and the backlight driving module of the liquid crystal display module through the SPI protocol, namely, the master control module is respectively communicated with the display driving module of the LED display module and the backlight driving module of the liquid crystal display module through the same protocol, so that the communication flow and the structural complexity of the spliced display device are simplified, the spliced display device is simple in structure and convenient to realize.
Optionally, the device includes a backlight driving module and N LED display modules, a data signal output end of the main control module is connected to a data signal input end of a display driving module of the 1 st LED display module, a data signal output end of a display driving module of the nth LED display module is connected to a data signal input end of a display driving module of the (N +1) th LED display module, a data signal output end of a display driving module of the nth LED display module is connected to a data signal input end of the backlight driving module, N is greater than or equal to 1, N is 1, …, N.
According to the optional embodiment, the backlight driving module and the N LED display modules are connected in series, so that the wiring amount is reduced, the splicing workload and the splicing difficulty of the splicing display device are effectively reduced, the splicing efficiency of the splicing display device is improved, and the condition of wrong wiring is avoided.
Optionally, the first chip selection signal port of the main control module is connected to a chip selection signal port of a display driving module of the LED display module, and the second chip selection signal port of the main control module is connected to a chip selection signal port of a backlight driving module of the liquid crystal display module.
In the optional embodiment, the corresponding chip selection signal ports are arranged for the backlight driving modules of the LED display module and the liquid crystal display module, so that the backlight driving modules of the LED display module and the liquid crystal display module can respectively receive corresponding content data, the transmission operation of the content data is simplified, and the data transmission efficiency of the assembled display device is improved.
Optionally, the synchronization signal port of the main control module is respectively connected to the synchronization signal port of the display driving module of the LED display module and the synchronization signal port of the backlight driving module of the liquid crystal display module.
In the optional embodiment, the synchronous signal ports are arranged corresponding to the backlight driving modules of the LED display module and the liquid crystal display module, so that the LED display module and the liquid crystal display module can synchronously display pictures, and the effect of visual seamless splicing is realized.
Optionally, the clock signal port of the main control module is respectively connected to the clock signal port of the display driving module of the LED display module and the clock signal port of the backlight driving module of the liquid crystal display module.
In the optional embodiment, the corresponding clock signal ports are arranged corresponding to the backlight driving modules of the LED display module and the liquid crystal display module, so as to realize synchronous data transmission and data reception of the backlight driving modules of the LED display module and the liquid crystal display module, and realize synchronous display of the LED display module and the liquid crystal display module.
Optionally, the main control module is an FPGA chip.
Optionally, the main control module communicates with the display driving module of the liquid crystal display module through an HDMI protocol.
Optionally, the LED display module is a Mini LED display module.
The second aspect of the present application provides a tiled display method for a tiled display device, where the tiled display device includes at least two liquid crystal display modules and at least one LED display module disposed at a tiled position of the at least two liquid crystal display modules, and the method includes:
and dividing the picture signal into sub-picture signals corresponding to the picture partitions of each display module, and sending the sub-picture signals to the display driving modules of the corresponding display modules, so that the display driving modules drive the corresponding display modules to display.
The invention has the following beneficial effects:
aiming at the technical problems in the prior art, the embodiment of the invention provides a tiled display device and a tiled display method, wherein a liquid crystal display module and an LED display module are arranged, wherein the LED display module is arranged at the tiled part between the liquid crystal display modules, so that the LED display module is used as a display unit to cover the frame (i.e. the tiled part) of the liquid crystal display module, and a sub-picture signal is respectively sent to the liquid crystal display module and the LED display module through a main control module to be displayed together, namely, the LED display module performs picture compensation on the tiled part between the liquid crystal display modules, so that the tiled part of the original tiled display device can also perform picture display, the tiled effect of the tiled display device can be effectively weakened, the picture display effect of the tiled display device is optimized, the seamless tiled display effect of the tiled display device is achieved, and the effect of visual seamless splicing is realized, the viewing comfort of the user is improved.
Drawings
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.
Fig. 1 shows a top view of a tiled display device according to the prior art.
Fig. 2 shows a top view of a tiled display arrangement in an embodiment of the present application.
Fig. 3 shows a top view of a tiled display arrangement in a further embodiment of the present application.
Fig. 4 shows a hardware connection manner of the tiled display device in an embodiment of the present application.
Fig. 5 shows a connection manner between a main control module of a tiled display device and a backlight driving module of a liquid crystal display module and a display driving module of an LED display module in an embodiment of the present application.
Detailed Description
In order to more clearly illustrate the present invention, the present invention will be further described with reference to the following examples and the accompanying drawings. Similar parts in the figures are denoted by the same reference numerals. It is to be understood by persons skilled in the art that the following detailed description is illustrative and not restrictive, and is not to be taken as limiting the scope of the invention.
In the description of the present invention, it should be noted that the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present invention. Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
It is further noted that, in the description of the present invention, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
As shown in fig. 1, in an LCD tiled display device 100 in the prior art, a width of a seam 120 formed by frames of adjacent LCD display screens 110 is within 1 mm, but the seam 120 is still visible to naked eyes, so that when a user watches the LCD tiled display device 100, a seam effect exists in the visual sense, and the viewing experience is poor.
In view of the above technical problems in the prior art, an embodiment of the present invention provides a tiled display device 200, as shown in fig. 2-5, the tiled display device 200 includes a main control module 210, at least two liquid crystal display modules, and at least one LED display module disposed at a tiled position of the at least two liquid crystal display modules; the main control module 210 is configured to divide the received picture signal into sub-picture signals corresponding to picture partitions of each display module, and send the sub-picture signals to the display driving modules of the corresponding display modules.
In a specific example, as shown in fig. 2, the tiled display apparatus 200 includes a first liquid crystal display module 220 and a second liquid crystal display module 221, wherein a right frame of the first liquid crystal display module 220 and a left frame of the second liquid crystal display module 221 form a tiled joint (i.e., a tiled joint) between the first liquid crystal display module 220 and the second liquid crystal display module 221. The first LED display module 222 is disposed on the joint to cover the joint between the first liquid crystal display module 220 and the second liquid crystal display module 221. Meanwhile, the main control module 210 divides the received picture signal into a first sub-picture signal, a second sub-picture signal and a third sub-picture signal which need to be displayed in the picture partition of the first liquid crystal display module 220, the picture partition of the second liquid crystal display module 221 and the picture partition of the first LED display module 222, and then the main control module 210 sends the first sub-picture signal, the second sub-picture signal and the third sub-picture signal to the corresponding display driving modules of the first liquid crystal display module 220, the second liquid crystal display module 221 and the first LED display module 222 respectively to drive the first liquid crystal display module 220, the second liquid crystal display module 221 and the first LED display module 222 to display corresponding pictures. The first LED display module 222 located at the splicing position is driven to display a corresponding picture by sending the third sub-picture signal, so that picture display at the splicing position between the adjacent liquid crystal display modules is also realized, and simultaneously, the picture displayed by the first LED display module 222 can well connect the pictures displayed by the first liquid crystal display module 220 and the second liquid crystal display module 221, so as to realize the effect of visual seamless splicing.
In one specific example, as shown in fig. 3, the tiled display apparatus 200 includes a first liquid crystal display module 230, a second liquid crystal display module 231, a third liquid crystal display module 232 and a fourth liquid crystal display module 233, wherein a right frame of the first liquid crystal display module 230 and a left frame of the second liquid crystal display module 231, a lower frame of the first liquid crystal display module 230 and an upper frame of the third liquid crystal display module 232, a lower frame of the second liquid crystal display module 231 and an upper frame of the fourth liquid crystal display module 233, and a right frame of the third liquid crystal display module 232 and a left frame of the fourth liquid crystal display module 233 form a tiled seam, respectively, the tiled display apparatus 200 further includes a first LED display module 234, a second LED display module 235, a third LED display module 236 and a fourth LED display module 237 arranged corresponding to four tiled seams (i.e. tiled seams of adjacent liquid crystal display modules), the first LED display module 234, the second LED display module 235, the third LED display module 236 and the fourth LED display module 237 are respectively disposed at four joints (i.e., joints of adjacent liquid crystal display modules). Meanwhile, the main control module 210 divides the received image signal into a first sub-image signal, a second sub-image signal, a third sub-image signal, a fourth sub-image signal, a fifth sub-image signal, a sixth sub-image signal, a seventh sub-image signal and an eighth sub-image signal, which are respectively required to be displayed in the image partitions of the first liquid crystal display module 230, the second liquid crystal display module 231, the third liquid crystal display module 232 and the fourth liquid crystal display module 233, and the image partitions of the first LED display module 234, the second LED display module 235, the third LED display module 236 and the fourth LED display module 237, and then the main control module 210 respectively transmits the first sub-image signal, the second sub-image signal, the third sub-image signal, the fourth sub-image signal, the fifth sub-image signal, the sixth sub-image signal, the seventh sub-image signal and the eighth sub-image signal to the corresponding first liquid crystal display module 230, the second liquid crystal display module 231, the third liquid crystal display module, the fourth, The second liquid crystal display module 231, the third liquid crystal display module 232, the fourth liquid crystal display module 233, the first LED display module 234, the second LED display module 235, the third LED display module 236 and the fourth LED display module 237, so as to drive the same to display corresponding pictures.
In another specific example, the tiled display device includes a first LED display module, a second LED display module, and a third LED display module arranged corresponding to four tiles, wherein the third LED display module is arranged at a tiled location of the first liquid crystal display module and the third liquid crystal display module and a tiled location of the second liquid crystal display module and the fourth liquid crystal display module, respectively.
It should be noted that fig. 2-3 are only exemplary, and the frames on the other sides of the lcd module are not labeled. It can be understood that the periphery of the liquid crystal display module is provided with a frame for accommodating components such as a driving circuit, and the splicing parts of the frames on other sides of the liquid crystal display module and the frames of the liquid crystal display modules adjacent to the frames can also be provided with LED display modules.
The tiled display device 200 of this embodiment is provided with a liquid crystal display module and an LED display module and performs a picture dividing technique, wherein the LED display module is disposed at the tiled location between the liquid crystal display modules, so that the LED display module is used as a display unit to cover the frame (i.e. the tiled location) of the liquid crystal display module, and sends a sub-picture signal to the liquid crystal display module and the LED display module through the main control module 210 respectively for displaying together, i.e. the LED display module performs picture compensation on the tiled location between the liquid crystal display modules, so that the tiled location of the original tiled display device can also perform picture display, the tiled effect of the tiled display device can be effectively weakened, the picture display effect of the tiled display device 200 can be optimized, the seamless tiled display effect of the tiled display device 200 can be achieved, the influence of the frame of the liquid crystal display module can be eliminated, and the seamless tiled effect of visual effect can be realized, the viewing comfort of the user is improved.
In a possible implementation manner, the main control module 210 is further configured to generate a local dimming signal according to the received picture signal, and send the local dimming signal to the backlight driving module 240 of the liquid crystal display module.
Specifically, the Local Dimming technique (Local Dimming) is to use hundreds of LEDs (Light Emitting diodes) to replace the existing ccfl (cold Cathode Fluorescent lamp), and according to the content of the display screen, the brightness of the LED Light source is locally adjusted or corresponding duty ratio data is set, so as to change the backlight brightness of each display area in real time, and further adjust the brightness of the display screen.
In a specific example, the main control module 210 receives the image signal and performs a local dimming calculation according to the received image signal to generate a local dimming signal (e.g., duty ratio data), and sends the local dimming signal to the backlight driving module 240 of the liquid crystal display module, and the backlight driving module 240 controls the light emitting state of the corresponding LED to implement local dimming of the tiled display device 200, so that the brightness of a highlighted portion in the display image can be maximized, and meanwhile, the brightness of a dark portion in the display image can be minimized or even turned off, so that the image displayed by the tiled display device 200 can achieve an optimal contrast, and meanwhile, the reduction of the brightness of the dark portion in the display image can also effectively reduce the power consumption of the backlight driving module. In one specific example, the backlight driving module 240 of the liquid crystal display module is a direct-type backlight driving module.
In this implementation manner, a local dimming signal is generated according to the picture signal, and the backlight driving module 240 controls the light emitting state of the corresponding light emitting unit according to the local dimming signal to adjust the backlight brightness of each display region of the liquid crystal display module, thereby simultaneously implementing the functions of simultaneously driving and locally dimming a plurality of display modules (the liquid crystal display module and the LED display module), further weakening the seam splicing effect of the tiled display device 200, and optimizing the picture display effect of the tiled display device 200. Moreover, the backlight power consumption can be saved, and the contrast and the image quality of the image display of the tiled display device 200 can be improved.
In a specific example, the main control module 210 may be further configured to generate a local dimming signal according to the received picture signal, and send the local dimming signal to the backlight driving module 240 of the liquid crystal display module and the display driving module of the LED display module, so as to implement the overall local dimming function of the tiled display device 200.
In a specific embodiment, the main control module 210 is further configured to process the received picture signal according to a picture compensation algorithm, so as to generate a picture signal after picture compensation, and transmit the picture signal after picture compensation to the backlight driving module 240 of the liquid crystal display module.
In one possible implementation, the main control module 210 communicates with the display driving module of the LED display module and the backlight driving module 240 of the liquid crystal display module through an SPI protocol.
The SPI (Serial peripheral interface) is a synchronous Serial protocol to realize Serial communication between different modules to exchange information. The data in the SPI format is not only transmitted from the main control module to the display driving module of the LED display module, but also transmitted to the backlight driving module of the liquid crystal display module. In one specific example, the LED display module is a Mini LED display module.
The main control module of the implementation mode communicates with the display driving module of the LED display module and the backlight driving module 240 of the liquid crystal display module through the SPI protocol, namely communicates with the display driving module of the LED display module and the backlight driving module 240 of the liquid crystal display module through the same protocol, thereby simplifying the structural complexity of a communication flow and a spliced display device, and facilitating the realization of the spliced display device 200 with a simple structure.
In a specific example, the main control module 210, the display driving module of the LED display module, and the backlight driving module 240 of the liquid crystal display module may be connected in a cascade manner, and the main control module transmits data to the display driving module of the LED display module and the backlight driving module 240 of the liquid crystal display module in the form of SPI through an SPI protocol, as shown in fig. 4 and 5.
In another specific example, the main control module is respectively connected with the display driving module of the LED display module and the backlight driving module of the liquid crystal display module, that is, the display driving module of the LED display module and the backlight driving module of the liquid crystal display module are arranged in parallel, and the main control module respectively transmits data to the display driving module of the LED display module and the backlight driving module of the liquid crystal display module through the SPI protocol.
In a specific embodiment, the main control module 210 communicates with the display driving module of the lcd module through an HDMI protocol, as shown in fig. 4. In a specific example, the display driving module of the liquid crystal display module may include, for example, an electronic System (System On Chip, SOC for short, also called as System On Chip) and a power board, where the power board is used to supply power to the liquid crystal display module, and the electronic System is used to receive the sub-picture signal corresponding to the picture partition of the liquid crystal display module and sent by the main control module 210 according to the HDMI protocol and drive the liquid crystal display panel to display. In another specific example, the main control module 210 is an FPGA (Field Programmable Gate Array) chip.
In a possible implementation manner, the device includes a backlight driving module 240 and N LED display modules, a data signal output end of the main control module 210 is connected to a data signal input end of a display driving module of the 1 st LED display module, a data signal output end of a display driving module of the nth LED display module is connected to a data signal input end of a display driving module of the (N +1) th LED display module, a data signal output end of a display driving module of the nth LED display module is connected to a data signal input end of the backlight driving module 240, N is greater than or equal to 1, N is 1, …, N.
In a specific example, the device includes backlight driver module and 1 LED display module assembly, N is 1, the data signal output part of the main control module is connected with the data signal input part of the display driver module of the 1 st LED display module assembly, the data signal output part of the display driver module of the 1 st LED display module assembly is connected with the data signal input part of the backlight driver module, namely, the data signal of the main control module is sequentially sent to the display driver module of the LED display module assembly and the backlight driver module of the liquid crystal display module assembly through the SPI protocol. In another specific example, one backlight driving module can drive the backlight modules of a plurality of liquid crystal display modules, thereby simplifying the structure of the tiled display device.
In a specific example, the apparatus includes a backlight driving module 240 and 3 LED display modules, where N is 3, N is 1,2, and 3, as shown in fig. 5, a data signal output terminal (DO port) of the main control module 210 is connected to a data signal input terminal (DI port) of a display driving module 251 of the 1 st LED display module, a data signal output terminal (DO port) of the display driving module 251 of the 1 st LED display module is connected to a data signal input terminal (DI port) of a display driving module 252 of the 2 nd LED display module, a data signal output terminal (DO port) of the display driving module 252 of the 2 nd LED display module is connected to a data signal input terminal (DI port) of a display driving module 253 of the 3 rd LED display module, a data signal output terminal (DO port) of the display driving module 253 of the 3 rd LED display module is connected to a data signal input terminal (DI port) of the backlight driving module 240, that is, the data signal of the main control module 210 is sequentially sent to the display driving module 251 of the 1 st LED display module, the display driving module 252 of the 2 nd LED display module, the display driving module 253 of the 3 rd LED display module, and the backlight driving module 240 of the liquid crystal display module through the SPI protocol.
In another embodiment, a data signal output terminal (DO port) of the backlight driving module 240 of the lcd module is connected to a data signal input terminal (DI port) of the main control module 210 for feeding back a local dimming signal to the main control module 210. In another specific example, the backlight driving module 240 of the liquid crystal display module, the display driving module 251 of the 1 st LED display module, the display driving module 252 of the 2 nd LED display module, and the display driving module 253 of the 3 rd LED display module may be, for example, a Micro Controller Unit (MCU).
This implementation is through establishing ties backlight drive module 240 and a plurality of LED display module assembly to reduce the wiring volume, effectively reduce tiled display device 200's concatenation work load and concatenation degree of difficulty, improve tiled display device 200's concatenation efficiency and avoid the condition of line mistake.
In a possible implementation manner, a first chip selection signal port of the main control module 210 is connected to a chip selection signal port of a display driving module of the LED display module, and a second chip selection signal port of the main control module 210 is connected to a chip selection signal port of the backlight driving module 240 of the liquid crystal display module.
Specifically, the main control module 210 may include a plurality of Chip select signal (CS) ports for respectively transmitting the CS signals1～CSNThe LED display module is used for selecting at least one display module from the liquid crystal display module and the LED display module. The data width of each chip select signal port may be, for example, 1 bit. In a specific example, a first level (e.g., a high level) may be set as an active level of the chip select signal, that is, when the chip select signal is at the first level (e.g., a high level), the corresponding display module is selected; it will be understood by those skilled in the art that the second level (e.g., low level) may also be set as the active level of the chip select signal, i.e., when the chip select signal is at the second level (e.g., low level), the corresponding display module is selected.
In the example shown in fig. 5, the first chip select signal port (CS _ LED) of the main control module 210 is connected to the display driving module 251 of the 1 st LED display module, the display driving module 252 of the 2 nd LED display module, and the chip select signal port (CS) of the display driving module 253 of the 3 rd LED display module, respectively, the second chip select signal port (CS _ BLU) is connected to the chip select signal port (CS) of the backlight driving module 240 of the liquid crystal display module, that is, the display driving module 251 of the 1 st LED display module, the display driving module 252 of the 2 nd LED display module, the display driving module 253 of the 3 rd LED display module, and the backlight driving module 240 of the liquid crystal display module are activated through the first chip select signal port (CS _ LED) and the second chip select signal port (CS _ BLU), so as to realize the selection of the plurality of LED display modules and the liquid crystal display module, meanwhile, the selection of the 3 LED display modules is realized through the first chip selection signal port (CS _ LED), which is beneficial to saving the port number of the main control module and simplifying the data transmission operation.
This implementation sets up corresponding chip selection signal port to LED display module assembly and liquid crystal display module assembly, thereby send data signal for liquid crystal display module assembly and LED display module assembly in proper order, make 1 st LED display module assembly's display driver module 251, 2 nd LED display module assembly's display driver module 252, 3 rd LED display module assembly's display driver module 253 and liquid crystal display module assembly's backlight driver module 240 can receive corresponding content data and control signal respectively, thereby simplify the transmission operation of content data, the system cost is reduced, improve the transmission efficiency between main control module 210 and LED display module assembly and the liquid crystal display module assembly and simplify the drive operation to LED display module assembly and liquid crystal display module assembly.
In a possible implementation manner, the synchronization signal port of the main control module 210 is respectively connected to the synchronization signal port of the display driving module of the LED display module and the synchronization signal port of the backlight driving module 240 of the liquid crystal display module.
In the example shown in fig. 5, the synchronization signal port (Sync) of the main control module 210 performs synchronization processing by connecting the display driving module 251 of the 1 st LED display module, the display driving module 252 of the 2 nd LED display module, the synchronization signal port (Sync) of the display driving module 253 of the 3 rd LED display module, and the synchronization signal port (Sync) of the backlight driving module 240 of the liquid crystal display module, so as to implement synchronous display of the LED display module and the liquid crystal display module.
In the implementation mode, the synchronous signal ports are arranged corresponding to the backlight driving modules of the LED display module and the liquid crystal display module, so that the LED display module and the liquid crystal display module can synchronously display pictures, and the effect of visual seamless splicing is realized.
In a possible implementation manner, the clock signal port of the main control module 210 is respectively connected to the clock signal port of the display driving module of the LED display module and the clock signal port of the backlight driving module 240 of the liquid crystal display module.
In a specific example, the main control module 210 may include a Clock Signal (SCLK) port (SCLK), and the Clock signal port (SCLK) may transmit the Clock Signal (SCLK) to the LED display module and the liquid crystal display module as a basis of the timing logic by being respectively connected to the display driving module 251 of the 1 st LED display module, the display driving module 252 of the 2 nd LED display module, the Clock signal port (SCLK) of the display driving module 253 of the 3 rd LED display module, and the Clock signal port (SCLK) of the backlight driving module 240 of the liquid crystal display module, and the Clock Signal (SCLK) has a fixed Clock frequency for controlling synchronization between data transmission and data reception between the main control module and the LED display module and the liquid crystal display module. In some embodiments, it may be set to transmit data signals and receive data signals differently on the rising edge of the clock signal SCLK. It will be understood by those skilled in the art that it may also be arranged to transmit data signals and receive data signals synchronously on the falling edge of the clock signal SCLK. In the example shown in fig. 5, the clock signal port (SCLK) of the main control module 210 is connected to the display driving module 251 of the 1 st LED display module, the display driving module 252 of the 2 nd LED display module, the clock signal port (SCLK) of the display driving module 253 of the 3 rd LED display module, and the clock signal port (SCLK) of the backlight driving module 240 of the liquid crystal display module at the same time, for example, the data width of the clock signal port (SCLK) may be 1 bit.
The realization mode is that corresponding clock signal ports are arranged corresponding to the backlight driving modules of the LED display module and the liquid crystal display module so as to realize synchronous data signal sending and data signal receiving of the backlight driving modules of the LED display module and the liquid crystal display module.
In a specific example, the tiled display apparatus 200 includes four liquid crystal display modules and four LED display modules disposed at the tiled positions of adjacent liquid crystal display modules, after the main control module 210 (e.g. FPGA chip) receives the whole picture signal to be displayed (e.g. from an electronic device such as a computer), the whole picture signal is decoded, and then the picture is divided according to the picture partition of each display module, and divided into the sub-picture signal to be displayed on the liquid crystal display module and the sub-picture signal to be displayed on the LED display module, and then the main control module 210 performs local dimming calculation and picture compensation algorithm calculation according to the determined picture partition for the sub-picture signal to be displayed on the liquid crystal display module, thereby generating a picture-compensated sub-picture signal and a local dimming signal (e.g., including duty cycle data); furthermore, the main control module 210 sends the compensated sub-picture signals corresponding to the picture partitions of each liquid crystal display module to the display driving module (e.g., SOC) corresponding to each liquid crystal display module in the HDMI protocol manner; and sends the local dimming signal (for example, including duty ratio data) and the sub-picture signal corresponding to the picture partition of each LED display module to the display driving module of the LED display module and the backlight driving module 240 of the liquid crystal display module in the form of SPI protocol. In a specific example, the display driving module of the LED display module and the backlight driving module 240 of the liquid crystal display module are selected and activated through the chip selection signal port of the main control module 210, and the display driving module of the LED display module and the backlight driving module 240 of the liquid crystal display module are synchronously processed through the synchronization signal port of the main control module 210.
Another embodiment of the present invention provides a tiled display method for a tiled display device 200, where the tiled display device 200 includes at least two liquid crystal display modules and at least one LED display module disposed at a tiled position of the at least two liquid crystal display modules, and the method includes:
and dividing the picture signal into sub-picture signals corresponding to the picture partitions of each display module, and sending the sub-picture signals to the display driving modules of the corresponding display modules so that the display driving modules drive the corresponding display modules to display.
It should be noted that the principle and the working flow of the tiled display method provided in this embodiment are similar to the working principle and the working flow of the tiled display apparatus, and reference may be made to the above description for relevant points, which are not described herein again.
It should be understood that the above-mentioned embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention, and it will be obvious to those skilled in the art that other variations and modifications can be made on the basis of the above description, and all embodiments cannot be exhaustive, and all obvious variations and modifications belonging to the technical scheme of the present invention are within the protection scope of the present invention.
Claims (11)
1. A spliced display device is characterized by comprising a main control module, at least two liquid crystal display modules and at least one LED display module arranged at the spliced position of the at least two liquid crystal display modules;
and the main control module is used for dividing the received picture signal into sub-picture signals corresponding to the picture partitions of each display module and sending the sub-picture signals to the display driving modules of the corresponding display modules.
2. The device of claim 1, wherein the main control module is further configured to generate a local dimming signal according to the received picture signal, and send the local dimming signal to a backlight driving module of the liquid crystal display module.
3. The device as claimed in claim 2, wherein the main control module communicates with the display driving module of the LED display module and the backlight driving module of the lcd display module via SPI protocol.
4. The device according to claim 3, wherein the device comprises a backlight driving module and N LED display modules, the data signal output terminal of the main control module is connected to the data signal input terminal of the display driving module of the 1 st LED display module, the data signal output terminal of the display driving module of the nth LED display module is connected to the data signal input terminal of the display driving module of the (N +1) th LED display module, the data signal output terminal of the display driving module of the Nth LED display module is connected to the data signal input terminal of the backlight driving module, N is greater than or equal to 1, and N is 1, …, N.
5. The device as claimed in claim 3, wherein the first chip selection signal port of the main control module is connected to a chip selection signal port of a display driving module of the LED display module, and the second chip selection signal port of the main control module is connected to a chip selection signal port of a backlight driving module of the liquid crystal display module.
6. The device according to claim 3, wherein the synchronization signal port of the main control module is respectively connected to the synchronization signal port of the display driving module of the LED display module and the synchronization signal port of the backlight driving module of the liquid crystal display module.
7. The device as claimed in claim 3, wherein the clock signal port of the main control module is connected to the clock signal port of the display driving module of the LED display module and the clock signal port of the backlight driving module of the LCD display module, respectively.
8. The device of claim 1, wherein the master control module is an FPGA chip.
9. The device of claim 1, wherein the main control module communicates with the display driving module of the liquid crystal display module via an HDMI protocol.
10. The device of claim 1, wherein the LED display module is a Mini LED display module.
11. A splicing display method is characterized by being used for a splicing display device, wherein the splicing display device comprises at least two liquid crystal display modules and at least one LED display module arranged at the splicing position of the at least two liquid crystal display modules, and the method comprises the following steps:
and dividing the picture signal into sub-picture signals corresponding to the picture partitions of each display module, and sending the sub-picture signals to the display driving modules of the corresponding display modules, so that the display driving modules drive the corresponding display modules to display.
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