Seamless display screen and seamless display device

Abstract

The present application discloses a splicing screen and a splicing display device. The splicing screen includes a plurality of spliced sub-display screens. Each sub-display screen includes an array substrate, a color filter substrate, and a liquid crystal layer located between the array substrate and the color filter substrate. A flexible OLED screen is provided at the splicing position between every two adjacent sub-display screens, and the flexible OLED screen at least partially coincides with the array substrates of the two adjacent sub-display screens in the vertical projection direction. With the above structure, the overall display effect of the splicing screen is improved.

Description

Technical Field

[0001] The present invention relates to the field of display panels, and in particular to a spliced ​​screen and a spliced ​​display device. Background Art

[0002] With the rapid development of display technology, splicing screens came into being. Because of their large-scene display effects and the ability to bring users an immersive visual experience, splicing screens are widely used in exhibitions.

[0003] The spliced ​​screen is composed of two or more sub-display screens, and can display large images. Traditional sub-display screens usually use iron frames. Each sub-display screen includes a display panel and a backlight source, and an iron frame is set around the periphery of the two. Due to the poor light transmittance of the iron frame, a black shading area appears at the seam between two adjacent sub-display screens, resulting in no pixels at the seam, that is, there is a long dark strip between the spliced ​​display panels, which affects the overall display effect of the spliced ​​screen. Summary of the invention

[0004] The present application provides a spliced ​​screen and a spliced ​​display device to improve the overall display effect of the spliced ​​screen.

[0005] To solve the above problems, the present application provides a spliced ​​screen, comprising a plurality of sub-display screens spliced ​​together, each sub-display screen comprising an array substrate, a color film substrate, and a liquid crystal layer located between the array substrate and the color film substrate, wherein a flexible OLED screen is arranged at the joint between each two adjacent sub-display screens, and the flexible OLED screen overlaps with at least part of the array substrates of the two adjacent sub-display screens in the vertical projection direction.

[0006] Preferably, the array substrate of each of the sub-display screens is longer than the liquid crystal layer and the color film substrate; the flexible OLED screen overlaps with a portion of the array substrate that is longer than the liquid crystal layer.

[0007] Preferably, the flexible OLED screen is located on a surface of the array substrate close to the liquid crystal layer; the flexible OLED screen includes a chip-on-chip film and a circuit board, and the chip-on-chip film passes through the joint of two adjacent array substrates and is connected to the circuit board located on the side of the array substrate away from the liquid crystal layer.

[0008] Preferably, the flexible OLED screen includes at least one row or one column of pixel units, each of the pixel units includes at least a red sub-pixel, a blue sub-pixel and a green sub-pixel; the pixel units of the flexible OLED screen adjacent to the sub-display screen also include a white sub-pixel, and the white sub-pixel is located at the outermost side of the flexible OLED screen.

[0009] Preferably, the flexible OLED screen includes an outer pixel unit disposed close to the sub-display screen and an inner pixel unit disposed away from the sub-display screen. The outer pixel unit includes white sub-pixels. The area of the inner pixel unit is larger than that of the outer pixel unit to balance the brightness between the inner pixel unit and the outer pixel unit.

[0010] Preferably, a pressure sensor is disposed within the flexible encapsulation layer of the white sub-pixels. When at least part of the pixel units of the flexible OLED screen are bent toward the side close to the array substrate, the pressure sensor detects the pressure signal received by the white sub-pixels to control the turning off of the white sub-pixels.

[0011] Preferably, the array substrates of two adjacent sub-display screens are spaced apart at the splicing position. At least part of the pixel units of the flexible OLED screen penetrate through the spaced position between two adjacent array substrates.

[0012] Preferably, the flexible OLED screen sequentially includes a flexible polarizing layer, a first flexible layer, a light-emitting layer, a flexible driving array layer, and a second flexible layer. Among them, at least the flexible driving array layer of the flexible OLED screen is bent toward the side close to the array substrate, penetrates through the spaced position between two adjacent array substrates, and is aligned with the lower surface of the array substrate.

[0013] The present application also provides a control method for a splicing screen. Among them, the splicing screen is the splicing screen described in any one of the above embodiments. The splicing screen has 2N rows of pixel units. The flexible OLED screen in the splicing screen includes a horizontal flexible OLED screen located between two adjacent rows of sub-display screens. The horizontal flexible OLED screen is a single pixel unit. The splicing screen further includes a liquid crystal gate driving circuit for controlling the sub-display screen, a first flexible gate driving circuit for controlling the horizontal flexible OLED screen, and a timing controller for controlling the liquid crystal gate driving circuit and the first flexible gate driving circuit. The control method includes: the timing controller sequentially sends driving signals to two adjacent rows of pixel units through the liquid crystal gate driving circuit to drive the two adjacent rows of pixel units to emit light. When the horizontal flexible OLED screen is located in an odd row, the timing controller sends the same driving signal as the pixel units in the (N + 1)-th row to the horizontal flexible OLED screen through the first flexible gate driving circuit. When the horizontal flexible OLED screen is located in an even row, the timing controller sends the same driving signal as the pixel units in the (N - 1)-th row to the horizontal flexible OLED screen through the first flexible gate driving circuit.

[0014] Preferably, the flexible OLED screen further includes a longitudinal flexible OLED screen located between two adjacent columns of the sub-display screens and a second flexible gate driving circuit for controlling the longitudinal flexible OLED screen; the control method further includes: the timing controller sends, through the second flexible gate driving circuit, the same driving signal as that of the pixel units in the adjacent columns in the same row to the longitudinal flexible OLED screen.

[0015] The beneficial effects of the present application are as follows: By providing a flexible OLED screen at the splicing position of two adjacent spliced sub-display screens, the flexible OLED screen coincides with the array substrates of the two adjacent sub-display screens at the splicing position, thereby reducing the area of the non-display area at the splicing position of the splicing screen, reducing the visual interference of the dark band at the splicing gap, making the original dark band at the splicing position become a display area, and increasing the display ratio of the splicing screen. In addition, due to external factors (such as thermal expansion and contraction) at the splicing position of the splicing screen, the size of the splicing position will change. In the present application, the flexible OLED screen can be bent. When the splicing position becomes larger, the flexible OLED screen in the bent part is stretched, and when the splicing position becomes smaller, the flexible OLED screen in the stretched part is shrunk, so as to cope with the size change of the splicing position, play a certain buffering role in the structure, and enable the flexible screen to change with the size change of the splicing position, so as to completely display the pixels, thereby improving the structural stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0017] Figure 1 It is a top view structural schematic diagram of an embodiment of the splicing screen of the present application;

[0018] Figure 2 It is a cross-sectional structural schematic diagram of the first embodiment of the splicing screen of the present application;

[0019] Figure 3 It is a pixel arrangement structural schematic diagram of an embodiment of the flexible OLED screen of the present application;

[0020] Figure 4 It is a cross-sectional structural schematic diagram of the second embodiment of the splicing screen of the present application;

[0021] Figure 5 It is a cross-sectional structural schematic diagram of the third embodiment of the splicing screen of the present application.

[0022] 11 Sub-display screen; 12 Flexible OLED screen; 101 Array substrate; 102 Color film substrate; 111 Upper polarizing layer; 112 Color film layer; 113 Liquid crystal layer; 114 Driving array layer; 115 Substrate; 116 Lower polarizing layer; 117 Positioning adhesive; 121 Flexible polarizing layer; 122 First flexible layer; 123 Light-emitting layer; 124 Flexible driving array layer; 125 Second flexible layer; 126 Chip on film; 127 Circuit board; 128 / 118 Frame adhesive; 1201 Pixel unit; R Red sub-pixel; B Blue sub-pixel; G Green sub-pixel; W White sub-pixel; 12012 Inner pixel unit; 12011 Outer pixel unit; 1211 Horizontal flexible OLED screen; 1212 Vertical flexible OLED screen. Detailed implementation manners

[0023] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0024] The terms used in the embodiments of the present application are only for the purpose of describing specific embodiments, and are not intended to limit the present application. The singular forms of "a", "the" and "said" used in the embodiments of the present application and the appended claims are also intended to include the plural forms, unless clearly stated otherwise in the above. "Plural" generally includes at least two, but does not exclude the case of including at least one.

[0025] It should be understood that the term "and / or" used herein is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " herein generally represents an "or" relationship between the associated objects before and after.

[0026] It should be understood that the terms "including", "comprising" or any other variation used herein are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed,

[0027] or also includes elements inherent to such a process, method, article or device. Without further limitations, the elements defined by the statement "including..." do not exclude the existence of additional identical elements in the process, method, article or device including

[0028] the said elements.

[0029] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) involved in the embodiments of this application, then such directional indications are only used to explain the relative positional relationships, movement conditions, etc. between components in a specific posture (such as shown in the attached

[0030] figure). If this specific posture changes, then the directional indications will also change accordingly.

[0031] Referring to "embodiments" herein means that the specific features, structures, or characteristics described in connection with the embodiments can be included in at least one embodiment of this application. The appearance of this phrase at each position in the specification does not necessarily refer to the same embodiment, nor are they mutually

[0032] exclusive, independent, or alternative embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0033] The design concept of this application is: in order to reduce the area of the dark band region of the splicing screen and improve the overall display effect of the splicing screen, a flexible OLED screen is added to the dark band region of the splicing screen to enhance the display brightness of the dark band region, thereby improving the overall display effect of the splicing screen.

[0034] This application provides a splicing screen. Specifically, please refer to Figure 1 , Figure 1 which is a top view structural schematic diagram of a splicing screen according to a first embodiment of this application. As Figure 1 shown, the splicing screen includes a plurality of mutually spliced sub-

[0035] display screens 11. There is a non-display splicing portion 13 between every two adjacent sub-display screens 11. In this embodiment, a flexible OLED screen 12 is provided at each splicing portion 13. Among them, the flexible OLED screen 12 includes a horizontal flexible OLED screen disposed between adjacent two rows of sub-display screens 11, and

[0036] a vertical flexible OLED screen disposed between adjacent two columns of sub-display screens 11, which is not limited herein. Among them, each sub-display screen 11 includes an array substrate 101, a color film substrate 102, and a

[0037] liquid crystal layer 113 located between the array substrate 101 and the color film substrate 102. Specifically, please refer to Figure 2 , Figure 2 which is a cross-sectional structural schematic diagram of a splicing screen according to a first embodiment of this application. As Figure 2 shown, a light-emitting flexible OLED screen 12 is provided at the splicing portion between two adjacent sub-display screens 11. Specifically, the flexible OLED screen 12 is located in the dark band regions of two adjacent sub-display screens 11.

[0038] In this embodiment, the flexible OLED screen 12 overlaps with at least part of the array substrate 101 of two adjacent sub-display screens 11 in the vertical projection direction, thereby reducing the gray display area of ​​the dark band area formed by splicing the array substrates 101 of the two adjacent sub-display screens 11, thereby increasing the overall display area of ​​the spliced ​​screen and improving the overall display effect.

[0039] In this embodiment, the array substrate 101 of each sub-display screen 11 is longer than the liquid crystal layer 113 and the color film substrate 102, wherein the portion of the array substrate 101 longer than the liquid crystal layer 113 forms a dark band area. In this embodiment, by arranging the flexible OLED screen 12 on the portion of the array substrate 101 longer than the liquid crystal layer 113 and the portion longer than the color film substrate, that is, on the dark band area, the area of ​​the dark band area is reduced, thereby improving the overall display effect. In addition, the portion of the array substrate 101 longer than the liquid crystal layer 113 is also provided with routing, wherein the flexible OLED screen 12 is located on the array substrate 101 and overlaps with a portion of the array substrate 101, and does not change the routing distribution on the array substrate 101, thereby ensuring the normal routing of the sub-display screen 11 while reducing the non-display area of ​​the sub-display screen 11 on the array substrate 101.

[0040] It should be noted that most of the wiring of the sub-display screen 11 is arranged by wiring on the array substrate 101. The portion of the array substrate 101 that is longer than the liquid crystal layer 113 must form a non-display area, that is, a dark band area, which is usually non-luminous. The present application improves the display brightness and display accuracy of the non-luminous area by arranging a flexible OLED screen 12 in the non-luminous area. Generally speaking, the flexible OLED screen 12 has a higher display clarity than ordinary light-emitting elements (such as lamps, etc.).

[0041] In the first specific embodiment, the array substrates 101 of two adjacent sub-display screens 11 are arranged to abut against each other at the joint, that is, the interval between the array substrates 101 of two adjacent sub-display screens 11 at the joint is very small. The flexible OLED screen 12 is located above the array substrate 101, and the upper side of the array substrate 101 refers to the side surface close to the liquid crystal layer 113.

[0042] In this specific embodiment, the flexible OLED screen 12 includes at least a chip-on-chip film 126 and a circuit board 127. The chip-on-chip film 126 penetrates the abutment of two adjacent array substrates 101 and is connected to the circuit board 127 located on the side of the array substrate 101 away from the liquid crystal layer 113. The circuit board 127 inputs electrical signals to the inside of the flexible OLED screen 12 through the chip-on-chip film 126, so that the flexible OLED screen 12 can display images.

[0043] Specifically, in this embodiment, the flexible OLED screen 12 sequentially includes a flexible polarizing layer 121, a first flexible layer 122, a light-emitting layer 123, a flexible driving array layer 124, and a second flexible layer 125 from top to bottom. Among them, the second flexible layer 125 is disposed close to the array substrate 101 and partially overlaps with two adjacent array substrates 101 in the vertical direction.

[0044] In this specific embodiment, at least the flexible driving array layer 124 of the flexible OLED screen 12 is bent toward the side close to the array substrate 101, so as to shorten the length of the flip-chip film 126 connecting the flexible driving array layer 124. Among them, the flip-chip film 126 is a flexible composite film with built-in circuits and ICs (chips), and is used to connect the flexible driving array layer 124 and the circuit board 127, so as to transmit the electrical signals of the circuit board 127 to the flexible driving array layer 124 to drive the flexible OLED screen 12 to emit light. The second flexible layer 125 is used to support and protect the flexible driving array layer 124. In this embodiment, the second flexible layer 125 is bent together with the flexible driving array layer 124. In other embodiments, the flexible driving array layer 124 may not be bent, that is, it is laid flat on the array substrate 101, which will result in an increase in the length of the flip-chip film 126 connecting the flexible driving array layer 124. The second flexible layer 125 may also be removed, but this is likely to cause problems such as unstable signals of the flexible OLED screen 12.

[0045] In this embodiment, preferably, the flexible driving array layer 124 and the second flexible layer 125 are longer than the light-emitting layer 123, the flexible polarizing layer 121, and the first flexible layer 122, so that the flexible driving array layer 124 and the second flexible layer 125 are more easily bent than other structures, so as to buffer / protect the light-emitting layer 123. In other embodiments, they may also be of the same length, that is, all layers of the flexible OLED screen 12 may be bent together.

[0046] Among them, in this application, the color filter substrate 102 includes a color filter layer 112 disposed close to the liquid crystal layer 113 and a polarizer layer 111 located away from the liquid crystal layer 113 on the color filter layer 112. The array substrate 101 includes a driving array layer 114 disposed close to the liquid crystal layer 113. The driving array layer 114 includes TFTs. Below the driving array layer 114 is a substrate 115, and a lower polarizer layer 116 located away from the liquid crystal layer 113 on the substrate 115.

[0047] In this embodiment, the flexible polarizing layer 121 of the flexible OLED screen 12 is aligned with the upper surface of the upper polarizing layer 111 of the color film substrate 102, thereby ensuring the overall flatness of the splicing screen. Among them, a part of the flexible OLED screen 12 is fixedly connected to the side walls of the color film substrates 102 of two adjacent sub-display screens 11 through a positioning adhesive 117. Specifically, the flexible polarizing layer 121 and the first flexible layer 122 of the flexible OLED screen 12 are abutted against a part of the side walls of the color film substrate 102 through the positioning adhesive 117. In this embodiment, the flexible polarizing layer 121 and the first flexible layer 122 of the flexible OLED screen 12 are thinner than the color film substrate 102, so that the flexible driving array layer 124 and the second flexible layer 125 can be bent, which is not limited herein. Refer Figure 2 , the positioning adhesive 117 is a transparent colloid, and the light emitted by the flexible OLED screen can pass through the positioning adhesive 117, thereby further reducing the dark band of the splicing screen. The positioning adhesive 117 can be made extremely narrow, so that the light-emitting units of the flexible screen fill the dark band area. Optionally, the positioning adhesive 117 can also be selected to use the first flexible layer, so as to perform the same process encapsulation as the first flexible layer; at this time, the first flexible layer can be selected from materials with adhesive properties, so that the first flexible layer adheres to the adjacent sub-display screen in the dark band area.

[0048] Among them, a frame adhesive 128 is further provided on the side wall of the light-emitting layer 123 close to the sub-display screen 12, which plays a role of light shielding to avoid mutual interference of light between the sub-display screen 11 and the flexible OLED screen 12. Further, a rubber frame 118 can also be provided on the side wall of the liquid crystal layer 113 in the sub-display screen 11 close to the flexible OLED screen 12, which plays a role of protecting the liquid crystal and also plays a role of avoiding mutual interference of light between the sub-display screen 11 and the flexible OLED screen 12.

[0049] In this embodiment, the flexible driving array layer 124 and the second flexible layer 125 of the flexible OLED screen 12 are bent toward the side close to the array substrate 101, that is to say, it is ensured that the flexible driving array layer 124 is bent downward to expose the light-emitting layer 123, thereby avoiding affecting the light emission of the light-emitting layer 123.

[0050] In this embodiment, the light-emitting layer 123 may include a plurality of pixel units. For details, please further refer to Figure 3 , Figure 3 is a schematic diagram of the pixel arrangement structure of an embodiment of the flexible OLED screen of the present application. As Figure 3 shown, the flexible OLED screen 12 includes at least one row or one column of pixel units 1201, and each pixel unit 1201 includes at least a red sub-pixel R, a blue sub-pixel B, and a green sub-pixel G.

[0051] Among them, the pixel unit 1201 of the flexible OLED screen 12 adjacent to the sub-display screen 11 further includes a white sub-pixel W. Among them, the white sub-pixel W is located on the outermost side of the flexible OLED screen. That is to say, the white sub-pixel W is provided at the position where the flexible OLED screen 12 intersects with the sub-display screen 11.

[0052] Specifically, the flexible OLED screen 12 includes an outer pixel unit 12011 disposed close to the sub-display screen 11 and an inner pixel unit 12012 disposed far from the sub-display screen 11. Both the outer pixel unit 12011 and the inner pixel unit 12012 are pixel units 1201. Among them, the outer pixel unit 12011 includes a white sub-pixel W, and the white sub-pixel W is disposed on the side close to the sub-display screen 11. In a specific embodiment, the area of the inner pixel unit 12012 is larger than the area of the outer pixel unit 12011, so as to balance the display brightness of the inner pixel unit 12012 and the outer pixel unit 12011. This is because the outer pixel unit 12011 includes a white sub-pixel W, and the white sub-pixel W emits white light, making the display brightness of the outer pixel unit higher than that of the inner pixel unit (formed by RGB sub-pixels). Therefore, by increasing the display area of the inner pixel unit 12012 where no white sub-pixel W is provided near the middle, the luminous brightness of the inner pixel unit is increased, and thus the display brightness of the inner pixel unit 12012 and the outer pixel unit 12011 tends to be balanced.

[0053] Further, a pressure sensor is also disposed within the flexible encapsulation layer of the white sub-pixel W. When at least some pixel units 1201 of the flexible OLED screen 12 are bent toward the side close to the array substrate 101, the pressure sensor detects the pressure signal received by the white sub-pixel W and transmits the pressure signal to the controller to control the white sub-pixel W to turn off, so as to make the display brightness of the flexible OLED screen 12 uniform. Among them, when the flexible OLED screen 12 is not bent, that is, when the flexible OLED screen 12 is not squeezed, the controller controls the white sub-pixel W to turn on at a low brightness, thereby achieving brightness uniformity. Among them, controlling the white sub-pixel W to turn off specifically means that when the white sub-pixel W is completely bent and rolled in (that is, when the white sub-pixel W is completely not on the front), at this time the controller controls the white sub-pixel W to completely turn off. Since most of the light emitted by the rolled-in white sub-pixel cannot penetrate, turning on the white sub-pixel at this time instead increases the power consumption. Therefore, turning off the white sub-pixel can instead reduce the power consumption. At the same time, since the white sub-pixel is bent and rolled in, the brightness of the outer pixel unit is lower than that of the inner pixel unit. At this time, the controller appropriately reduces the brightness of the inner pixel unit to improve the light emission uniformity of the flexible OLED screen; when the white sub-pixel W is partially bent and rolled in (that is, when the white sub-pixel W is partially on the front), at this time the controller controls the white sub-pixel W to turn on. Since the RGB light-emitting area of the outer pixel unit is smaller than that of the inner pixel unit at this time, the brightness of the white sub-pixel W is controlled to be increased to improve the brightness uniformity of the flexible OLED screen; when the white sub-pixel W is not bent and rolled in (that is, when the white sub-pixel W is all on the front), at this time the controller controls the white sub-pixel W to turn on at a low brightness. By turning on the white sub-pixel W at a low brightness, the brightness of the outer pixel unit and the inner pixel unit tend to be the same, thereby improving the brightness uniformity of the flexible OLED screen at this time. The controller can be a timing controller. For details, please refer to Figure 4 , Figure 4 which is a schematic cross-sectional structure diagram of the second embodiment of the splicing screen of the present application. As Figure 4 shown, the light-emitting layer 123 is bent in the direction close to the array substrate 101 in the same way as the flexible driving array layer 124 and the second flexible layer 125. That is, at least some sub-pixels on both sides of the light-emitting layer 123 are bent. At this time, at least the white sub-pixel W in the outer pixel unit is rolled into the space between the flexible driving array layer 124 and the array substrate 101. When the white sub-pixel W is rolled in, the light of the white sub-pixel W cannot penetrate from the front, and the controller controls the white sub-pixel W to completely turn off. In this embodiment, the two sides of the light-emitting layer 123 of the flexible OLED screen 12 can be shielded from light without using the glue frame 128. Among them, Figure 4 shows the position where the white sub-pixel W is located. The other sub-pixels (RGB) are not specifically drawn. For the specific arrangement of the other sub-pixels, please refer to Figure 3 , which will not be elaborated here.

[0054] In the W sub-pixel, a pressure sensor is disposed at the middle position of the first flexible layer of the W sub-pixel; when the pressure sensor senses pressure, it indicates that the W sub-pixel has started to bend. At this time, the brightness of the W sub-pixel is increased, and the controller controls the brightness of the W sub-pixel to be half of the peak value; when the pressure sensor does not sense pressure, it indicates that the W sub-pixel is not bent or bent less. At this time, the brightness of the W sub-pixel is lower to keep the brightness of the outer pixel unit and the inner pixel unit relatively consistent. At this time, the controller controls the brightness of the W sub-pixel to be one-fourth of the peak value. At the same time, an auxiliary pressure sensor is disposed at the junction between the W sub-pixel and the adjacent R / G / B sub-pixels. When the auxiliary pressure sensor senses pressure, it indicates that the W sub-pixel has been completely bent into the gap. At this time, the controller controls the W sub-pixel to turn off to reduce the overall power consumption of the pixel unit; at the same time, the controller controls the brightness of the R / G / B sub-pixels in the outer pixel unit to increase, so as to adjust the brightness of the outer pixel unit to be as consistent as possible with the brightness of the inner pixel unit.

[0055] The present application also provides a third splicing screen. For details, please refer to Figure 5 , Figure 5 which is a schematic cross-sectional structure diagram of the third embodiment of the splicing screen of the present application. As Figure 5 shown, in the third specific embodiment, the array substrates 101 of two adjacent sub-display screens 11 are spaced apart at the splicing position, that is to say, the spacing distance is relatively large. Among them, the spacing distance between two adjacent sub-display screens 11 can be set according to the size of the flexible OLED screen 12 and actual requirements.

[0056] In the third specific embodiment, the flexible driving array layer 124 and the second flexible layer 125 of the flexible OLED screen 12 are bent towards the direction close to the array substrate 101, penetrate through the spacing position between two adjacent array substrates 101, and extend towards the direction close to the lower polarizing layer 116 of the array substrate 101. Specifically, the extending ends of the flexible driving array layer 124 and the second flexible layer 125 are aligned with the lower polarizing layer 116, and at least do not protrude from the lower surface of the lower polarizing layer 116 to ensure the neatness of the splicing screen.

[0057] In this embodiment, the two ends of the flexible driving array layer 124 are spaced apart by the second flexible layer 125, so that the flip-chip thin films 126 and the circuit boards 127 connected to the two ends of the flexible driving array layer 124 are spaced apart.

[0058] In this embodiment, by passing the flexible driving array layer 124 through the spacing position of the array substrate 101 and extending it towards the outside close to the circuit board 127, the length of the flip-chip thin film 126 is further shortened.

[0059] In the third specific embodiment, at least part of the pixel units 1201 of the flexible OLED screen 12 passes through the interval between two adjacent array substrates 101 . At this time, the pixel units 1201 are squeezed by the side walls of the array substrate 101 .

[0060] In the third specific embodiment, the flexible OLED screen 12 includes two chip-on-chip films 126 and a circuit board 127, wherein one group of chip-on-chip films 126 is connected to the circuit board 127 and one end of the flexible driving array layer 124 of the flexible OLED screen 12, and the other group of chip-on-chip films 126 is connected to the circuit board 127 and the other end of the flexible driving array layer 124.

[0061] In this specific embodiment, the two adjacent sub-display screens 11 are also connected to the first flip chip film and the second flip chip film, as well as the first circuit board and the second circuit board (not numbered in the figure). The first circuit board is connected to the drive array layer 114 of the sub-display screen 11 on one side of the flexible OLED screen 12 through the first flip chip film, and the second circuit board is connected to the drive array layer 114 of the sub-display screen 11 on the other side of the flexible OLED screen 12 through the second flip chip film. In a specific embodiment, the first circuit board and the first flip chip film, as well as the second circuit board and the second flip chip film, all pass through the gap between the two adjacent array substrates 101, that is, the first circuit board and the first flip chip film are connected to the array substrate 101. Figure 2 One of the sets of flip chip films 126 overlaps with the circuit board 127, and the second circuit board and the second flip chip film overlap with Figure 2 Another set of chip-on-chip films 126 in the flexible OLED screen 12 overlaps with the circuit board 127. By leading the circuit boards and chip-on-chip films of two adjacent sub-display screens 11 out from the middle of the two spliced ​​array substrates 101, the wiring difficulty of the wiring is reduced. In another embodiment, the circuit boards and chip-on-chip films of the sub-display screens 11 can also be led out from the side away from the flexible OLED screen 12, which is not limited here.

[0062] In this specific embodiment, the first COF and the first circuit board and the second COF and the second circuit board extend outward from the middle position of the array substrate 101, and the first COF and the second COF are separated by the second flexible layer 125. The two ends of the second flexible layer 125 may be in contact or separated, which is not limited here.

[0063] The beneficial effects of this embodiment are as follows: By arranging flexible OLED screens in the non-display areas of two adjacent spliced sub-displays, the flexible OLED screens coincide with the non-display parts of the array substrates of the two adjacent sub-displays, thereby reducing the area of the non-display area of the spliced screen, reducing the visual interference of the dark band at the splicing gap, making the dark band at the original splicing seam become the display area, and increasing the display ratio of the spliced screen. In addition, the splicing seam is transitioned by a flexible panel, which can play a certain buffering role in terms of structure compared with other components, and the structural stability is better.

[0064] This application also provides a control method for a spliced screen according to the structure of the spliced screen. Among them, the spliced screen has a total of 2N rows of pixel units, including a sub-display 11 and a flexible OLED screen 12. The flexible OLED screen 12 in the spliced screen includes a horizontal flexible OLED screen 1211 located between two adjacent rows of sub-displays. Among them, the horizontal flexible OLED screen 1211 is a single-pixel unit, that is, it only includes a group of pixel units. The spliced screen also includes a liquid crystal gate driving circuit for controlling the sub-display 11, a first flexible gate driving circuit for controlling the horizontal flexible OLED screen 1211, and a timing controller for controlling the liquid crystal gate driving circuit and the first flexible gate driving circuit. The specific control method includes:

[0065] The timing controller sequentially sends driving signals to two adjacent rows of pixel units through the liquid crystal gate driving circuit to drive each two adjacent rows of pixel units in the sub-display 11 to emit light.

[0066] Among them, when the horizontal flexible OLED screen is in the odd row (N rows), the timing controller sends the same driving signal as the pixel units in the (N + 1)th row to the pixel units of the horizontal flexible OLED screen through the first flexible gate driving circuit, so that the horizontal flexible OLED screen 12 is connected to the sub-pixels of the sub-display 11 to avoid picture display misalignment caused by display delay.

[0067] Among them, when the horizontal flexible OLED screen is in the even row (N rows), the timing controller sends the same driving signal as the pixel units in the (N - 1)th row to the pixel units of the horizontal flexible OLED screen through the first flexible gate driving circuit, so that the horizontal flexible OLED screen 12 is connected to the sub-pixels of the sub-display 11.

[0068] Further, the flexible OLED screen also includes a vertical flexible OLED screen 1212 located between two adjacent columns of sub-displays, and a second flexible gate driving circuit for controlling the vertical flexible OLED screen 1212. Among them, the control method for the vertical flexible OLED screen 1212 includes: The timing controller sends the same driving signal as the pixel units in the adjacent columns of the same row to the vertical flexible OLED screen through the second flexible gate driving circuit.

[0069] When the above control method is used to perform display control on the splicing screen, for the convenience of control, simplifying the display control algorithm, and improving the driving speed, only one row of pixel units (outer pixel units) is set for the horizontal flexible OLED screen, and white sub-pixels are set on both sides of the pixel unit. Since the signals of the vertical flexible OLED screen are the same as those of the pixel units in the adjacent columns of the same row, multiple pixel units (i.e., multiple columns of pixel units) can be set for the vertical flexible OLED screen, and at this time, the complexity of the algorithm will not be increased and the driving speed will not be affected. Therefore, for the setting of the vertical flexible OLED screen, the horizontal gap can be made wider according to the actual situation to set multiple pixel units for the vertical flexible OLED screen to adapt to a wider splicing gap. Considering the display control speed, the horizontal flexible OLED screen is set to have only one row of pixel units. At this time, it is required that the vertical gap is narrow enough. In order to adapt to a smaller vertical gap, other wiring and connection structures can be set as much as possible on the horizontal sides of the sub-display screen. With such a design, the speed and efficiency of display control are achieved, and the display effect is improved.

[0070] Furthermore, since only one row of pixel units (i.e., outer pixel units) is set for the horizontal flexible OLED screen, it is required that the upper and lower borders of the sub-display screen are extremely narrow at this time. And since the vertical flexible OLED screen can be made wider, the left and right ends of the sub-display screen can be made wider. Therefore, in this embodiment, the liquid crystal gate driving circuit, the first flexible gate driving circuit, and the second flexible gate driving circuit are all set at the left and right ends of the sub-display screen to further narrow the upper and lower borders of the sub-display screen.

[0071] In some embodiments, since the main driving signals of each row of pixels of the vertical flexible OLED screen are the same as those of the row pixels in the sub-display screen of the same row, the liquid crystal gate driving circuit and the second flexible gate driving circuit can be combined and set as the liquid crystal gate driving circuit, that is, the liquid crystal gate driving circuit is used to drive the same row of pixels in the sub-display screen and the vertical flexible screen. At this time, it is equivalent to reducing the second flexible gate driving circuit, and only the liquid crystal gate driving circuit and the first flexible gate driving circuit are retained. The liquid crystal gate driving circuit and the first flexible gate driving circuit are respectively set at the left and right ends of the sub-display screen to further narrow the left and right borders of the sub-display screen, thereby improving the display effect of this splicing screen.

[0072] This splicing screen is targeted at studios or large conference rooms that require an extra-large display screen. Traditional non-spliced display panels can already reach 85, 86 inches or even larger. Such traditional display panels can already meet most usage scenarios. However, for studios or large conference rooms with extra-large display screens, the actual demonstration panels or wall screens far exceed 100 inches. At this time, in order to facilitate installation and save costs, multiple small-sized display panels are used for splicing. At the same time, due to the extra-large curtain walls in studios or large conference rooms and the relatively long viewing distance of the audience, the requirement for display precision is not that high. At this time, adjacent rows of pixel units are driven with the same driving signal, that is, adjacent rows display the same color. At this time, the impact on the viewing effect of users is very small. And due to the setting of the horizontal flexible OLED screen and the linked display control with the sub-display screen, the driving algorithm is reduced and the driving speed is increased, greatly improving the display effect of this splicing screen.

[0073] In other embodiments, when the flexible OLED screen has multiple pixel units, including multiple rows or columns of pixel units, it can be set according to the resolution of the display image of the flexible OLED screen, the resolution of the sub-display screen, and the opening sequence of the pixel units, which will not be elaborated here one by one.

[0074] The above are only the embodiments of this application, and do not limit the patent scope of this application accordingly. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of this application, or directly or indirectly applied in other related technical fields, shall be similarly included in the patent protection scope of this application.

Claims

1. A splicing screen, comprising a plurality of spliced sub-display screens, each sub-display screen including an array substrate, a color filter substrate, and a liquid crystal layer located between the array substrate and the color filter substrate, characterized in that, A flexible OLED screen is arranged at the joint between each two adjacent sub-display screens, and the flexible OLED screen overlaps at least part of the array substrates of the two adjacent sub-display screens in the vertical projection direction; the flexible OLED screen includes at least one row or one column of pixel units, each of the pixel units includes at least red sub-pixels, blue sub-pixels and green sub-pixels, and the pixel units of the flexible OLED screen adjacent to the sub-display screens also include white sub-pixels, and the white sub-pixels are located at the outermost side of the flexible OLED screen; the flexible OLED screen includes an outer pixel unit arranged close to the sub-display screen and an inner pixel unit arranged away from the sub-display screen, the outer pixel unit includes a white sub-pixel, and the area of ​​the inner pixel unit is larger than that of the outer pixel unit, so that the brightness of the inner pixel unit and the outer pixel unit is balanced.

2. The splicing screen according to claim 1, characterized in that, The array substrate of each sub-display screen is longer than the liquid crystal layer and the color film substrate; the flexible OLED screen overlaps with a portion of the array substrate that is longer than the liquid crystal layer.

3. The splicing screen according to claim 1, characterized in that, The flexible OLED screen is located on a surface of the array substrate close to the liquid crystal layer; The flexible OLED screen includes a chip-on-chip film and a circuit board. The chip-on-chip film passes through the joint of two adjacent array substrates and is connected to the circuit board located on a side of the array substrate away from the liquid crystal layer.

4. The splicing screen according to claim 1, wherein A pressure sensor is arranged in the flexible encapsulation layer of the white sub-pixel; when at least part of the pixel units of the flexible OLED screen are bent toward the side close to the array substrate, the pressure sensor detects the pressure signal received by the white sub-pixel to control the closing of the white sub-pixel.

5. The splicing screen according to claim 1, characterized in that, The array substrates of two adjacent sub-display screens are spaced apart at the joint; At least part of the pixel units of the flexible OLED screen penetrates the interval between two adjacent array substrates.

6. The splicing screen according to claim 5, wherein The flexible OLED screen includes a flexible polarizing layer, a first flexible layer, a light-emitting layer, a flexible driving array layer and a second flexible layer in sequence; Wherein, at least the flexible driving array layer of the flexible OLED screen is bent toward a side close to the array substrate, passes through the interval between two adjacent array substrates, and is aligned with the lower surface of the array substrate.

7. A control method for a splicing screen, characterized in that, The spliced ​​screen is the spliced ​​screen according to any one of claims 1 to 6, the spliced ​​screen is a 2N-row pixel unit, the flexible OLED screen in the spliced ​​screen includes a horizontal flexible OLED screen located between two adjacent rows of sub-display screens, and the horizontal flexible OLED screen is a single pixel unit; the spliced ​​screen also includes a liquid crystal gate drive circuit for controlling the sub-display screen, a first flexible gate drive circuit for controlling the horizontal flexible OLED screen, and a timing controller for controlling the liquid crystal gate drive circuit and the first flexible gate drive circuit; The control method comprises: The timing controller sends driving signals to the pixel units in two adjacent rows in sequence through the liquid crystal gate driving circuit to drive the pixel units in two adjacent rows to emit light; When the horizontal flexible OLED screen is located in an odd row, the timing controller sends the same driving signal as the pixel units in the (N + 1)-th row to the horizontal flexible OLED screen through the first flexible gate driving circuit; When the horizontal flexible OLED screen is located in an even row, the timing controller sends the same driving signal as the pixel units in the (N - 1)-th row to the horizontal flexible OLED screen through the first flexible gate driving circuit.

8. The control method of the splicing screen according to claim 7, characterized in that, The flexible OLED screen further includes a vertical flexible OLED screen located between two adjacent columns of the sub-display screens and a second flexible gate driving circuit for controlling the vertical flexible OLED screen; The control method further includes: the timing controller sends the same driving signal as the pixel units in the adjacent columns in the same row to the vertical flexible OLED screen through the second flexible gate driving circuit.

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