CN215577444U

CN215577444U - Seamless display device of many screens concatenation

Info

Publication number: CN215577444U
Application number: CN202122138306.1U
Authority: CN
Inventors: 曾建军
Original assignee: SHENZHEN VD WALL VIDEO TECHNOLOGY CORP
Current assignee: SHENZHEN VD WALL VIDEO TECHNOLOGY CORP
Priority date: 2021-09-06
Filing date: 2021-09-06
Publication date: 2022-01-18
Anticipated expiration: 2031-09-06

Abstract

The utility model provides a seamless display device of concatenation is shielded to many screens, wades concatenation display screen technical field, solves the unreasonable technical problem of display device structural design of current concatenation of shielding more, and technical scheme includes: at least two display screens all are equipped with rather than the complex concatenation display module group on every display screen, and each concatenation display module group all includes LED display panel, module drive control board and at least one FFC winding displacement. The utility model has the beneficial effects that: the LED display panel can cover the piece that forms between the display screen completely after the display screen concatenation, and the LED display panel receives the picture that the display drive circuit control on the module drive control board is in order to show regional border part disappearance for can be perfect after the concatenation of this device realize the concatenation of whole pair of picture show, the display effect is good. In addition, the LED display panel and the module driving control panel are respectively arranged on the front side and the back side of the display screen, and the separated structural design ensures that the thickness of the LED display panel is extremely small, the LED display panel can be prevented from being excessively protruded, and the integral display effect is good.

Description

Seamless display device of many screens concatenation

Technical Field

The utility model relates to the technical field of spliced display screens, in particular to a multi-screen spliced seamless display device.

Background

Generally, the display screens such as OLED screens or LED screens have frame structures for protecting the screens, and the frame structures of the display screens cannot display pictures, so that when a plurality of OLED screens or LED screens are horizontally spliced together to display a whole picture, video pictures can be disconnected at the spliced positions of the display screens, obvious black spliced seams which do not display the pictures are formed, and the display effect of the whole picture of the spliced screen is seriously influenced.

At present, in order to eliminate the seams of non-picture display generated by multi-screen splicing, a solution adopting an optical device and a solution adopting an embedded LED light bar are available in the market. If the scheme of butting two display screens by adopting an optical device refers to the scheme disclosed in a spliced screen with Chinese patent application number 202010266103.8, the scheme is to splice two display panels by utilizing a light guide plate with an I-shaped section, the frame of the display screen is embedded in grooves at two sides of the I-shaped section, and the backlight at the bottom of the display panel is led out from the middle part of the I-shaped section by utilizing the light transmission of the light guide plate, so that the black spliced seam is covered by utilizing refraction and scattering backlight. Although the scheme can cover the abutted seams to a certain degree, the derived refraction and scattering backlight cannot be perfectly spliced with the whole display picture, so that the whole picture is displayed extremely incoordinatively, and the display effect is poor.

If the solution of embedding the LED light bar is adopted, referring to the solution disclosed in the spliced display screen with the Chinese patent application number of 201510344585.3, the scheme covers the frame of the main display screen through the secondary liquid crystal display screen, and the color displayed by the secondary liquid crystal display screen is consistent with that of the main display screen through the color corrector. Although the scheme can cover the black splicing seams of multi-screen splicing and plays the pictures with the colors similar to those of the main display screen through the auxiliary liquid crystal display screen, the color corrector is only an auxiliary adjusting means, and the display effect of the color corrector cannot achieve the effect of perfect splicing with the whole picture. And the thickness of the auxiliary liquid crystal display is larger, and the scheme is that a step structure is arranged at the edge of the main display screen to be embedded with the auxiliary liquid crystal display so as to solve the problem that the auxiliary liquid crystal display protrudes outwards, but the design causes the manufacturing process of the main display screen to be more complex and the production cost to be higher. In addition, in order to prevent the display area of the main display screen from being exposed, a certain non-display area exists between the step structure and the display area to protect the screen, so that the display area of each main display screen and the secondary liquid crystal display screen cannot be perfectly spliced after splicing, and the splicing display effect is poor.

Therefore, there is a need for an improved structure of the multi-panel display device to overcome the above-mentioned drawbacks.

SUMMERY OF THE UTILITY MODEL

In summary, the present invention is directed to solve the technical problems of unreasonable structural design, high production cost and poor tiled display effect of the conventional multi-screen tiled display device, and provides a multi-screen tiled seamless display device, which can well overcome the technical deficiencies of the conventional devices or schemes, thereby providing an excellent seamless tiled display effect.

In order to solve the technical defects provided by the utility model, the technical scheme is as follows:

a multi-screen spliced seamless display device comprises at least two horizontally spliced display screens, wherein each display screen comprises a display area and a non-display area, and a middle seam is reserved between the two non-display areas of two adjacent display screens; its characterized in that all is equipped with at least a set of concatenation display module assembly on each display screen, each group the concatenation display module assembly all including:

the LED display panel is fixedly covered on a non-display area on the front side of the display screen and a half of the middle seam, and the whole thickness of the LED display panel is within 1 mm;

the module driving control board is fixedly arranged on the back of the display screen and is provided with a display driving circuit for driving the LED display panel to play the video pictures missing from the edge of the display area of the display screen;

one end of at least one FFC flat cable is connected to the LED display panel, and the other end of the FFC flat cable bypasses the side wall of the display screen through the center seam and is connected to the module driving control panel, so that the display driving circuit is connected with the LED display panel.

The technical scheme adopted by the utility model for solving the technical problem further comprises the following steps:

the width of the passage of the central seam is between 0.5mm and 1.0 mm.

The LED display panel comprises: the front surface of the PCB substrate is provided with an LED array, the back surface of the PCB substrate is provided with at least one row of FFC socket bonding pads arranged along the length direction of the PCB substrate, and the FFC socket bonding pads are connected with the LED array through the PCB substrate.

The FFC bus bar is characterized in that the row plug part at one end of the FFC bus bar is surface mounted on the FFC row plug bonding pad by adopting an SMT process, the row plug part at the other end of the FFC bus bar is correspondingly inserted into the FFC row socket on the outer surface of the module driving control panel through the middle seam, and the FFC row socket is connected with the display driving circuit.

The pixel pitch of the LED array is within 0.5 mm.

The PCB substrate is an ultrathin PCB, and the thickness of the ultrathin PCB is between 0.2mm and 0.5 mm.

And an oblique angle which is obliquely inclined downwards from the upper end edge is cut on one side of the PCB substrate, which faces the edge of the display area of the display screen.

The included angle between the oblique angle and the vertical plane is between 20 degrees and 90 degrees, the lower end of the oblique angle is aligned with the outer side of the edge of the display area of the display screen, and the upper end of the oblique angle is positioned at the inner side of the edge of the display area.

The display screen is an OLED screen or an LED screen.

The utility model has the beneficial effects that:

1. according to the utility model, after two display screens respectively provided with the splicing display modules are horizontally spliced, the splicing seam formed between the two display screens can be completely covered by the two LED display panels of the two splicing display modules, and no gap is formed between the two LED display panels after the two LED display panels are covered. Because the LED display panel is controlled by the display drive circuit on the module drive control panel to display the missing picture of the edge part of the display area of the display screen, the spliced display screen and the LED display panel covering the spliced seam can perfectly realize the spliced display of the whole picture, the aim of seamless display of multi-screen splicing is realized, and the display effect of the whole picture of the spliced screen is improved.

2. The display panel and the control panel are respectively arranged on the front side and the back side of the display screen and are connected through the FFC flat cable penetrating through the center seam, compared with the existing design scheme that the whole LED lamp strip is embedded on the non-display area of the display screen, the separated structure design of the utility model obviously reduces the whole thickness of the spliced display module, and the whole thickness of the LED display panel is within 1mm, therefore, the LED display panel of the utility model is not particularly sharp after being covered on the non-display area of the display screen, the visual height difference is small, the step fracture of the image can not be caused even if the LED display panel is viewed from the side or an oblique angle, the whole consistency of the picture of the spliced screen is higher, and the whole display effect of the utility model is ensured. Therefore, the step structure is not needed to be arranged on the non-display area of the display screen to be embedded with the LED display panel so as to enable the display interface to be flush, and therefore the process complexity and the production and manufacturing cost of the display screen are reduced.

3. According to the utility model, the spliced display modules are arranged on each display screen and can be spliced in a modular combined assembly mode, the LED display panel and the module driving control panel are connected through the FFC flat cable which is thin in texture and high in flexibility, and the FFC flat cable can be bent to a certain extent and can smoothly pass through the middle seam along with the radian curve of the side edge of the display screen, so that the LED display panel and the module driving control panel can be conveniently and quickly connected, and the construction progress can be conveniently improved.

4. The LED display panel and the module driving control panel are connected through the FFC flat cable which is thin in texture and high in flexibility, so that the width of a passage of a middle seam formed between the two display screens can be set smaller, the width of a splicing seam of the splicing screen is reduced, the influence of the LED display panel on the picture display of the whole splicing screen is reduced, and the seamless display effect of the whole picture of the splicing screen is further improved.

Drawings

FIG. 1 is a top view of the overall structure of the present invention;

FIG. 2 is a schematic transverse cross-sectional view of the present invention;

FIG. 3 is a schematic diagram of a back side structure of a PCB substrate according to the present invention;

fig. 4 is an enlarged schematic view of a local structure of the LED display panel of the present invention fixed on a non-real area of the display screen.

Detailed Description

The structure of the present invention will be further described with reference to the accompanying drawings and preferred embodiments of the present invention.

Referring to fig. 1, the present invention:

a multi-screen spliced seamless display device comprises:

at least two display screens 1 of rectangular structure that can the corresponding concatenation of level, each display screen 1 all includes the display area (being display panel 11, carries out the picture display) in middle part and the non-display area (being frame 12, can not carry out the picture display) of border department all around, leaves centre joint 13 between two non-display areas of two adjacent display screens 1 that correspond the concatenation.

Preferably, the display screen 1 is an OLED screen or an LED screen, the video display effect is good, and the display requirements of most spliced display screens are met.

Specifically, referring to fig. 1 and 2, the display panel 1 of the present invention includes a bottom structural support plate 14 for fixing and supporting, the structural support plate 14 is a rectangular structure, the display panel 11 is laid on the middle of the upper surface of the structural support plate, the frame 12 is fixed at four sides of the structural support plate 14 and surrounds and protects the display panel 11, and the frame 12 is flush with the upper surface of the display panel 11.

The technical improvement of the utility model is that each display screen 1 is provided with at least one group of spliced display modules 2, and each group of spliced display modules 2 comprises:

the whole thickness of the long strip-shaped LED display panel 21 is within 1mm, the long strip-shaped LED display panel is fixedly covered on the non-display area (i.e., the frame 12) on the front surface of the display screen 1, and the side edge of the long strip-shaped LED display panel extends to the half of the middle seam 13 towards the outer side of the frame 12 so as to cover the half of the middle seam 13.

The module driving control board 22 is fixedly connected to the back of the structural support plate 14 of the display screen 1 through a fastener 15 by screw threads, and a display driving circuit (not shown in the figure) for driving the LED display panel 21 to play the video picture missing from the edge of the display area of the display screen 1 is arranged on the module driving control board 22. In actual use, the module driving control board 22 can receive video image data input by an upper computer or a video processor, and generates driving and scanning signals required for driving the LED display panel after processing by an LED driving IC (not shown) and a line scanning IC (not shown) of the display driving circuit.

And the upper end of each FFC flat cable 23 is electrically connected to the LED display panel 21, and the other end of each FFC flat cable 23 bypasses the side wall of the display screen 1 through the middle slit 13 and is electrically connected to the module driving control panel 22 so as to connect the display driving circuit with the LED display panel 21.

During the actual use, the module drive control panel 22 at the back of the LED display panel 21 and the display screen 1 is electrically connected together through the FFC flat cable 23 which is thin in texture and high in flexibility, the LED display panel 21 is controlled by a display drive circuit on the module drive control panel 22, the FFC flat cable 23 receives video image data, and the video picture missing at the edge of a display area of the display screen 1 is played by driving and scanning signals, so that the display screen 1 and the splicing display module 2 spliced together can display a complete picture together, and the seamless display of multi-screen splicing is realized.

By adopting the technical means, the utility model has the following technical effects:

firstly, after two display screens 1 respectively provided with the splicing display modules 2 are horizontally and correspondingly spliced, the two LED display panels 21 of the two splicing display modules 2 can completely cover the splicing seam formed between the two display screens 1, and no gap is formed between the two LED display panels 21 after the two display screens are covered. Because the LED display panel 21 is controlled by the display drive circuit on the module drive control panel 22 to play the picture that the display area border portion of display screen 1 lacks, consequently the concatenation of polylith display screen 1 and the LED display panel 21 that covers on the piece can be perfect the concatenation of realization whole pair of picture show, has realized the seamless display purpose of many screens concatenation, has improved the display effect of the whole picture of concatenation screen.

Meanwhile, the display panel and the control panel of the tiled display module 2 are respectively arranged on the front side and the back side of the display screen 1 and connected through the FFC flat cable 23 penetrating through the center seam 13, compared with the existing design scheme that the whole LED lamp strip is inlaid on the non-display area of the display screen 1, the separated structure design of the utility model obviously reduces the whole thickness of the tiled display module 2, and the whole thickness of the LED display panel 21 is within 1mm, therefore, the LED display panel 21 of the utility model can not appear to be particularly sharp after being covered on the non-display area of the display screen 1, the visual height difference is small, the step fracture of the image can not be caused even if the display panel is viewed from the side or an oblique angle, the whole consistency of the picture of the tiled display screen is higher, and the whole display effect of the utility model is ensured. Therefore, the present invention does not need to provide a sinking step structure on the non-display area (i.e. the frame 12) of the display panel 1 to embed the LED display panel 21 so as to make the display interface level, thereby reducing the process complexity and the manufacturing cost of the display panel 1.

Moreover, each display screen 1 of the utility model is provided with the splicing display module 2, the display can be assembled by adopting a modular assembly mode during the installation, the LED display panel 21 and the module driving control panel 22 are connected by the FFC flat cable 23 which is thin in texture and high in flexibility, and the FFC flat cable 23 can be bent to a certain degree and can smoothly pass through the middle seam 13 along with the radian curve of the side edge of the display screen 1, thereby being convenient for connecting the LED display panel 21 and the module driving control panel 22, therefore, the utility model can be conveniently and rapidly assembled on the construction site, and is beneficial to improving the construction progress.

In addition, the LED display panel 21 and the module driving control panel 22 are connected by the FFC flat cable 23 which is thin and high in flexibility, so that the width of a passage of the middle seam 13 formed between the two display screens 1 can be set smaller, the width of the splicing seam of the spliced screen is reduced, the influence of the LED display panel 21 on the display of the whole spliced screen is reduced, and the seamless display effect of the whole picture of the spliced screen is further improved.

referring to fig. 1, the width of the central slit 13 between two adjacent display panels 1 is 0.5mm to 1.0mm, preferably 0.5 mm.

The thickness of the FFC winding displacement 23 on the market is about 0.2mm at present, and the width of the middle joint 13 between the two display screens 1 is designed to be 0.5mm, so that the edges of each LED display panel 21 of the two groups of spliced display modules 2 which are correspondingly spliced can extend 0.25mm to the middle joint 13, and each FFC winding displacement 23 of each spliced display module 2 can smoothly pass through the middle joint 13 without influencing the FFC winding displacement 23 of the spliced display module 2 on the other display screen 1. Meanwhile, the width of the middle seam 13 is designed to be 0.5mm, so that the width of the spliced seam between the two display screens 1 can be reduced to the greatest extent, the width of the LED display panel 21 is reduced, the influence of the LED display panel 21 on the whole picture display of the spliced screen is reduced, and the display effect of the whole picture of the spliced screen is improved.

Referring to fig. 2, during actual assembly, in order to facilitate the disassembly and assembly of the LED display panel 21 and adjust the position of the display module 2 according to the splicing condition of the display screen 1 at any time, the LED display panel 21 in this embodiment is fixedly attached to the non-display area of the display screen 1 through the thin double-sided tape 3. The thickness of the thin double-sided adhesive tape 3 is between 0.2mm and 0.4mm, and the protruding degree of the LED display panel 21 can be reduced as much as possible after the thin double-sided adhesive tape is pasted.

Further, referring to fig. 2, each LED display panel 21 of the present invention includes:

PCB base plate 211, its front adopts SMT technology surface mounting to lay LED emitting diode array 212, and its back is equipped with two rows of FFC row that arrange along its length direction and inserts pad 213, FFC row insert pad 213 warp PCB base plate 211 with LED emitting diode array 212 connect.

Furthermore, the row plug part at the upper end of each FFC flat cable 23 is surface-mounted on one row of FFC row plug pads 213 on the back surface of the PCB substrate 211 by adopting an SMT process, the row plug part at the other end of the FFC flat cable 23 is correspondingly plugged into an FFC row socket 221 surface-mounted on the outer surface of the module driving control board 22 by adopting the SMT process through a middle seam 13, and the FFC row socket 221 is connected with the display driving circuit.

Further, the LED array 212 of the LED display panel 21 of the present invention has a pixel pitch within 0.5mm, preferably 0.5 mm.

Further, the PCB substrate 211 is an ultra-thin PCB, and the thickness thereof is between 0.2mm and 0.5mm, and preferably 0.3 mm.

The structural design of the existing LED display panel is that most of the LED light emitting diode array 212 is attached to the front side of the PCB substrate 211, and the driving and scanning circuit device (i.e. the module driving control board 22) for driving the LED light emitting diode array to display images is attached to the back side of the PCB substrate 211, so that the thickness of the existing LED display panel corresponds to the height of the LED light emitting diode array 212, and the thickness of the PCB substrate 211, and the sum of the heights of the driving and scanning circuit devices, which makes the overall thickness of the existing LED display panel too large, and is not suitable for being attached to the non-display area of the display screen 1. The spliced display module 2 is designed in a separated structure, the PCB substrate 211 adopts the existing mature ultra-thin PCB design scheme, the thickness of the PCB substrate is about 0.3mm, and the LED light-emitting diode array 212 can adopt the existing mature Mini LED or Micro LED display manufacturing technology to weld the LED light-emitting diodes.

The LED display panel 21 of the device of the utility model has the advantages that the thin double-sided adhesive 3 with the thickness of 0.2 mm-0.4 mm is adhered to one side of the back surface of the PCB substrate of the LED display panel 21, one side of the thin double-sided adhesive 3 is not welded with other electronic components except for the patch part of the FFC flat cable which is surface-adhered and welded by the SMT process, and the thickness of the FFC flat cable is about 0.2mm, so the whole thickness of the LED display panel (comprising the PCB substrate 211+ the height of the LED light-emitting diode + the thin double-sided adhesive 3) is smaller, the thickness of the LED display panel of the utility model is reduced by about 50% compared with the thickness of the existing LED display panel 21, the whole thickness of the LED display panel can be below 1mm or even to 0.5mm, and the LED display panel 21 of the utility model can be arranged on a non-display area adhered with the display screen 1 without appearing sharp, the visual height difference is smaller, and the whole display effect of the utility model is further improved.

At present, the pixel pitch of the Mini LED or the Micro LED can be as low as 0.5mm, so that the pixel pitch of the LED display panel of the device can be close to the pixel pitch of an OLED panel or an LCD panel, and therefore 21-pixel-level image quality display of the LED display panel can be realized, and the LED display panel can perform perfect picture splicing display with a display area of the display screen 1.

One end of the FFC flat cable 23 is welded on the FFC flat cable insertion pad 213 on the back side of the PCB substrate 211 by adopting an SMT process, and the other end of the FFC flat cable 23 is movably connected to the module driving control board 22 in a quick plugging manner through the flat cable insertion part and the FFC flat cable socket 221.

Referring to fig. 3, the PCB substrate 211 of the LED display panel of the present embodiment is designed with two rows of FFC bus pads 213 for soldering the FFC bus lines on the back side thereof, which can provide a sufficient number of signal contact connection lines to the module driving control board 22. For example, if the FFC flat cable has a pitch of 0.5mm, a single row of 20mm wide FFC flat cables 23 can provide 40 connecting traces, and two FFC flat cables 23 with a double row design can provide 80 connecting traces. If the LED array 212 of the LED display panel adopts a pixel pitch of 1mm, 20 display pixels are correspondingly arranged in the column direction of the LED display panel with a length of 20mm, and each display pixel corresponds to 3 LED lamps (red, green and blue, respectively), 60 driving signal lines are needed correspondingly, and then an upper scanning driving line, a power supply and a ground line are added, so that 80 connecting lines are not exceeded, and the design of two FFC flat cables 23 can meet the display control requirement of the LED display panel 21 with a pixel pitch of 1 mm.

It should be noted that each tiled display module 2 specifically requires several FFC bus lines 23 to connect the LED display panel 21 with the module driving control board 22, and the adjustment should be performed according to the non-display area width of the display screen 1, the actual tiled condition, and the pixel pitch of the LED display panel 21.

Further, referring to fig. 4, the PCB substrate 211 of the LED display panel 21 of the present invention is cut with a bevel 4 inclined downward from the upper edge toward the edge of the display area of the display panel 1.

Further, the included angle between the bevel angle 4 and the vertical plane is 20-90 degrees, and in the embodiment, is set to be 30 degrees. The lower end of the bevel 4 is aligned with the outer side of the display area edge of the display screen 1, and the upper end of the bevel 4 is positioned at the inner side of the display area edge.

The PCB substrate of the LED display panel is processed into the bevel angle 4 of more than 20 degrees at one side of the display area of the display screen 1, so that when a viewer watches the spliced screen from the bevel angle 4 degrees, the edge picture of the display area of the display screen 1 cannot be blocked by the edge of the PCB substrate 211, thereby avoiding the visual dislocation when the viewer watches the screen obliquely, avoiding the occurrence of black gaps at the side edge of the LED display panel 21 and further improving the splicing display effect of the whole picture of the spliced screen.

The above examples are merely for the purpose of clarifying a specific embodiment of the present invention and are not intended to limit the scope of the present invention. For those skilled in the art, it is understood that other adjustments or modifications to the tiled display module 2, the LED display panel 21, the module driving control board 22, the display driving circuit, and the FFC bus 23 can be inferred according to the present invention, and are not listed here. Any modification, replacement or improvement made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.

Claims

1. A multi-screen spliced seamless display device comprises at least two display screens which can be correspondingly spliced, wherein each display screen comprises a display area and a non-display area, and a middle seam is reserved between the two non-display areas of the two adjacent display screens; its characterized in that all is equipped with at least a set of concatenation display module assembly on each display screen, each group the concatenation display module assembly all including:

2. A multi-panel spliced seamless display device as claimed in claim 1, wherein the width of the path of the center slit is between 0.5mm and 1.0 mm.

3. A multi-panel seamless display device according to claim 1, wherein the LED display panel comprises: the front surface of the PCB substrate is provided with an LED array, the back surface of the PCB substrate is provided with at least one row of FFC socket bonding pads arranged along the length direction of the PCB substrate, and the FFC socket bonding pads are connected with the LED array through the PCB substrate.

4. A multi-panel spliced seamless display device according to claim 3, wherein the patch board at one end of the FFC flat cable is surface mounted on the FFC patch pad by SMT, the patch board at the other end of the FFC flat cable is correspondingly plugged into the FFC patch socket on the outer surface of the module driving control board through the middle slit, and the FFC patch socket is connected to the display driving circuit.

5. A multi-panel tiled seamless display according to claim 3, wherein the pixel pitch of the LED arrays is within 0.5 mm.

6. A multi-panel spliced seamless display device according to claim 3, wherein the PCB substrate is an ultra-thin PCB having a thickness of 0.2mm to 0.5 mm.

7. A multi-panel tiled seamless display according to claim 3, wherein a side of the PCB substrate facing the display area edges of the display panel is cut with a bevel that slopes obliquely downward from an upper edge.

8. A multi-panel tiled seamless display according to claim 7, wherein the included angle between the oblique angle and the vertical plane is between 20 ° and 90 °, and the lower end of the oblique angle is aligned with the outside of the display area edge of the display panel, and the upper end of the oblique angle is located inside the display area edge.

9. A multi-panel spliced seamless display device as claimed in claim 1, wherein the display panel is an OLED panel or an LED panel.