WO2021169554A1 - 显示装置和拼接屏 - Google Patents

显示装置和拼接屏 Download PDF

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Publication number
WO2021169554A1
WO2021169554A1 PCT/CN2020/140236 CN2020140236W WO2021169554A1 WO 2021169554 A1 WO2021169554 A1 WO 2021169554A1 CN 2020140236 W CN2020140236 W CN 2020140236W WO 2021169554 A1 WO2021169554 A1 WO 2021169554A1
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WO
WIPO (PCT)
Prior art keywords
liquid crystal
crystal display
light
circuit board
display device
Prior art date
Application number
PCT/CN2020/140236
Other languages
English (en)
French (fr)
Inventor
齐佳坤
张恩亮
Original Assignee
京东方科技集团股份有限公司
北京京东方显示技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 京东方科技集团股份有限公司, 北京京东方显示技术有限公司 filed Critical 京东方科技集团股份有限公司
Priority to US17/415,253 priority Critical patent/US20220404659A1/en
Publication of WO2021169554A1 publication Critical patent/WO2021169554A1/zh

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    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/13336—Combining plural substrates to produce large-area displays, e.g. tiled displays
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K1/00—Printed circuits
    • H05K1/18—Printed circuits structurally associated with non-printed electric components
    • H05K1/189—Printed circuits structurally associated with non-printed electric components characterised by the use of a flexible or folded printed circuit
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/133308—Support structures for LCD panels, e.g. frames or bezels
    • G02F1/133314—Back frames
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/133528—Polarisers
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • 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
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K1/00—Printed circuits
    • H05K1/02—Details
    • H05K1/0277—Bendability or stretchability details
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K1/00—Printed circuits
    • H05K1/02—Details
    • H05K1/14—Structural association of two or more printed circuits
    • H05K1/148—Arrangements of two or more hingeably connected rigid printed circuit boards, i.e. connected by flexible means
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/133388—Constructional arrangements; Manufacturing methods with constructional differences between the display region and the peripheral region
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133616—Front illuminating devices
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F2201/00—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00
    • G02F2201/44—Arrangements combining different electro-active layers, e.g. electrochromic, liquid crystal or electroluminescent layers
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
    • H05K2201/05—Flexible printed circuits [FPCs]
    • H05K2201/056—Folded around rigid support or component
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
    • H05K2201/10—Details of components or other objects attached to or integrated in a printed circuit board
    • H05K2201/10007—Types of components
    • H05K2201/10106—Light emitting diode [LED]
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
    • H05K2201/10—Details of components or other objects attached to or integrated in a printed circuit board
    • H05K2201/10007—Types of components
    • H05K2201/10128—Display
    • H05K2201/10136—Liquid Crystal display [LCD]

Definitions

  • the present disclosure relates to the field of display equipment, and in particular to a display device and a splicing screen.
  • the liquid crystal display device is a common display device with the advantages of small thickness and light weight, and is widely used in people's daily life.
  • a splicing screen is usually used.
  • the splicing screen is to align the border edges of a plurality of individual liquid crystal display devices and form a display device with a larger area after being spliced together.
  • the LCD device is spliced, there will be seams between adjacent liquid crystal display devices.
  • the existence of seams causes the screen displayed on the splicing screen to be divided, which destroys the continuity and integrity of the image, and seriously affects the vision of the splicing screen. Effect.
  • the embodiment of the present disclosure provides a display device and a splicing screen.
  • the technical solution is as follows:
  • an embodiment of the present disclosure provides a display device that includes a liquid crystal display, a light board, and a printed circuit board.
  • the light board includes a flexible circuit board and a plurality of light-emitting diodes.
  • the flexible circuit board includes Connected first part and second part, the plurality of light-emitting diodes are located in the first part, the first part is located at the edge of the front of the liquid crystal display screen, and the second part extends from the outside of the liquid crystal display screen To the back of the liquid crystal display, the printed circuit board is located on the back, and the second part is detachably plugged into the printed circuit board.
  • the second part includes a fitting part and an extension part, the first part, the fitting part and the extension part are connected in sequence, and one side of the fitting part is attached to the edge of the front surface ,
  • the first part is superposed on the side of the bonding portion away from the liquid crystal display, the extension portion is connected to the bonding portion, and the extension portion is detachably plugged into the printed circuit board .
  • the first part protrudes outwardly from the edge of the front surface from the middle of the front surface.
  • the light board further includes a reinforcing plate, the reinforcing plate has two opposite board surfaces, the other side of the bonding portion is bonded to one side of the reinforcing board, and the first part is bonded to The other side of the reinforcing plate.
  • the edge of the front surface of the liquid crystal display screen has a stepped surface for positioning, and the lamp board is attached to the stepped surface.
  • the liquid crystal display screen includes a display panel and a polarizer on one side of the display panel, the orthographic projection of the polarizer on the display panel is located in the display panel, and the polarizer and the polarizer The portion of the display panel that extends beyond the polarizer forms the stepped surface.
  • the front of the liquid crystal display screen includes a display area located in the middle of the front surface and a non-display area located at the edge of the front surface. The boundaries of the non-display area overlap.
  • the front surface of the liquid crystal display screen is polygonal, and at least two light panels are arranged along the same side of the front surface, and each of the light panels is continuously arranged along the edge of the front surface.
  • the printed circuit board is located on the edge of the back surface, and the lamp board and the printed circuit board are located on the same side of the liquid crystal display screen.
  • the display device further includes a back cover, the back cover is located on the back of the liquid crystal display screen, the printed circuit board is located in the space enclosed by the back cover and the liquid crystal display screen, the The back cover has an opening, and the flexible circuit board passes through the opening.
  • the back cover has a side wall connected to the liquid crystal display screen, and the opening is located on the side wall.
  • the opening is in a strip shape, the opening is parallel to the back of the liquid crystal display screen, and the middle of the side of the opening away from the back has an escape notch.
  • the plurality of light-emitting diode arrays are distributed, and the pitch of the adjacent light-emitting diodes is the same as the pixel pitch of the liquid crystal display screen.
  • the light panel further includes a light-transmitting lampshade, and the light-transmitting lampshade is arranged outside the light emitting diode.
  • the embodiments of the present disclosure also provide a splicing screen, the splicing screen includes at least two display devices that are spliced with each other, and at least one of the at least two display devices includes the display device described in the previous aspect. .
  • FIG. 1 is a structural diagram of a display device provided by an embodiment of the present disclosure
  • FIG. 2 is a schematic diagram of a partial structure of a display device provided by an embodiment of the present disclosure
  • FIG. 3 is an expanded structure diagram of the flexible circuit board in FIG. 2;
  • FIG. 4 is a top view of a display device provided by an embodiment of the present disclosure.
  • Fig. 5 is a partial structural diagram of Fig. 2;
  • FIG. 6 is a schematic view of splicing between a display device and another display device according to an embodiment of the present disclosure
  • FIG. 7 is a schematic diagram of a partial structure of a display device provided by an embodiment of the present disclosure.
  • FIG. 8 is a partial schematic diagram of a display device provided by an embodiment of the present disclosure.
  • FIG. 9 is a schematic diagram of a splicing method provided by an embodiment of the present disclosure.
  • FIG. 10 is a schematic diagram of the rear structure of a display device provided by an embodiment of the present disclosure.
  • FIG. 11 is a schematic diagram of a partial structure of a display device provided by an embodiment of the present disclosure.
  • FIG. 12 is a schematic diagram of a partial structure of a splicing screen provided by an embodiment of the present disclosure.
  • FIG. 1 is a structural diagram of a display device provided by an embodiment of the present disclosure.
  • the display device includes a liquid crystal display 10, a lamp board 20 and a printed circuit board 30.
  • the light board 20 includes a flexible circuit board 21 and a plurality of light emitting diodes 22.
  • the broken line structure shown in FIG. 1 is another display device for splicing.
  • the flexible circuit board 21 includes a first part 211 and a second part 212 that are connected.
  • a plurality of light emitting diodes 22 are located in the first part 211.
  • the first part 211 is located at the edge of the front of the liquid crystal display 10, and the second part 212 extends from the outside of the liquid crystal display 10 to the back of the liquid crystal display 10.
  • the front side is the side of the liquid crystal display 10 displaying images
  • the back side is the surface opposite to the front side.
  • the printed circuit board 30 is located on the back of the liquid crystal display 10, and the second part 212 is detachably plugged on the printed circuit board 30.
  • the light board includes a flexible circuit board and a plurality of light-emitting diodes. Since the flexible circuit board includes a first part and a second part connected, more Two light-emitting diodes are located in the first part, the first part is located on the edge of the front of the LCD screen, the second part of the flexible circuit board extends from the outside of the LCD screen to the back of the LCD screen, and is detachable from the printed circuit board on the back of the LCD screen Ground connection, so you can control multiple light-emitting diodes to display images through the printed circuit board, and because the first part is located on the edge of the front of the LCD screen, the images displayed by multiple light-emitting diodes can block the edge area of the LCD screen. When multiple display devices are spliced into a spliced screen, the splicing can be reduced or even eliminated, thereby improving the visual effect.
  • the second portion 212 of the flexible circuit board 21 extends from the outside of the liquid crystal display 10 to the back of the liquid crystal display 10, and is detachably connected to the printed circuit board 30 located on the back of the liquid crystal display 10.
  • the second part 212 can be disconnected from the printed circuit board 30, the first part 211 can be disconnected from the front of the liquid crystal display 10, the light board 20 can be removed for repair, or it can be replaced with a new one.
  • the arrangement of the plurality of light-emitting diodes 22 may be the same as the arrangement of the pixels of the liquid crystal display 10, so that the display effect of the light panel 20 is closer to the display effect of the liquid crystal display 10.
  • a plurality of light-emitting diodes 22 are distributed in an array, and the pitch of adjacent light-emitting diodes 22 may be the same as the pixel pitch of the liquid crystal display 10. Setting the pitch of the light-emitting diodes 22 according to the pixel pitch of the liquid crystal display 10 can make the display effect of the lamp panel 20 closer to that of the liquid crystal display 10, which is beneficial to improve the overall display effect of the display device and the splicing screen.
  • the color of the plurality of light-emitting diodes 22 may also be the same as the color of the pixels of the liquid crystal display 10.
  • the plurality of light-emitting diodes 22 may include red light-emitting diodes, green light-emitting diodes, and blue light-emitting diodes.
  • the liquid crystal display screen 10 usually has pixels in three colors of red, green, and blue, and the light-emitting diodes 22 also use red. The configuration of, green and blue makes the display effect of the light board 20 closer to the display effect of the liquid crystal display 10.
  • the light emitting diode 22 may be a packaged light emitting diode 22, and the packaged light emitting diode 22 has a longer service life.
  • FIG. 2 is a schematic diagram of a partial structure of a display device provided by an embodiment of the present disclosure.
  • the light board 20 may further include a light-transmitting lamp shade 23, and the light-transmitting lamp shade 23 is arranged outside the light emitting diode 22.
  • the light-transmitting lampshade 23 can provide protection to the light-emitting diode 22, and at the same time can make the light emitted by the light-emitting diode 22 appear softer, and avoid particularly glare when viewed from a certain direction.
  • the light-transmitting lampshade 23 can be glued to the flexible circuit board 21.
  • the light-transmitting lampshade 23 may be made of optical resin to facilitate light transmission.
  • All the light-emitting diodes 22 on the light board 20 can be located in the same light-transmitting lampshade 23.
  • the light board 20 may also include a plurality of light-transmitting lampshades 23, and each light-transmitting lampshade 23 is provided with several light-emitting diodes 22, for example, each transparent lampshade 23 is provided with a light-emitting diode 22, or each transparent lampshade 23 is provided with a light-emitting diode 22.
  • Three light emitting diodes 22 are provided.
  • the second part 212 of the flexible circuit board 21 may include a bonding part 2121 and a first part 211.
  • the first part 211, the bonding part 2121, and the extension part 2122 are connected in sequence.
  • One side of the bonding part 2121 is bonded to the edge of the front surface.
  • the bonding portion 2121 is connected, and the extension portion 2122 is detachably plugged on the printed circuit board 30.
  • the flexible circuit board 21 is mounted to the front of the liquid crystal display 10 through the bonding portion 2121 of the second part 212.
  • the extension 2122 can be wound from the side of the liquid crystal display 10 to the back of the liquid crystal display 10 to connect to the printed circuit board 30.
  • the side of the display screen 10 is the surface connecting the back of the liquid crystal display 10 and the front of the liquid crystal display 10. In this way, only the connection between the flexible circuit board 21 and the printed circuit board 30 is required, and the connection between the bonding portion 2121 and the front of the liquid crystal display 10 is disconnected, and then the light board 20 can be removed to complete the disassembly of the light board 20.
  • the first part 211 can extend outward from the middle of the front of the liquid crystal display 10 to the edge of the front of the liquid crystal display 10, so that when the splicing screen is set, the part of the first part 211 beyond the edge of the front can be overlapped with the adjacent display. On the device, this part is used to block the non-display area of the adjacent display device to reduce the seam.
  • the liquid crystal display 10 may be a flat display or a curved display.
  • the flat display screen can be used to splice a larger area flat display screen, or a larger area curved display screen, and the curved display screen can splice a larger area curved display screen. Since the flexible circuit board 21 can be bent, the flexible circuit board 21 can be bent to a certain degree when joining the curved display screen, so that the light board 20 fits the curve of the curved display screen more closely, and further improves the visual effect.
  • the light board 20 can be pasted on the liquid crystal display 10.
  • the light board 20 may be bonded by adhesive tape.
  • double-sided resin pressure-sensitive adhesive tape can be used for sticking.
  • the thickness of the double-sided resin pressure-sensitive tape can be 0.008mm ⁇ 0.012mm.
  • the double-sided resin pressure-sensitive tape has the characteristics of thin thickness. The use of double-sided resin pressure-sensitive tape for pasting is beneficial to reduce the height of the lamp board 20 and the LCD screen 10. Poor, further enhance the visual effect of the display device.
  • FIG. 3 is an expanded structure diagram of the flexible circuit board in FIG. 2.
  • the second part 212 of the flexible circuit board 21 may be provided with a gold finger 2120.
  • the printed circuit board 30 may have a gold finger connector, and the second part 212 of the flexible circuit board 21 may be inserted into the gold finger connector through a gold finger.
  • the golden finger and golden finger connectors are used for connection, which is convenient for disassembly and assembly.
  • FIG. 4 is a top view of a display device provided by an embodiment of the present disclosure.
  • the front of the liquid crystal display screen 10 includes a display area A located in the middle of the front surface and a non-display area B located at the edge of the front surface.
  • the non-display area B surrounds the display area A, and the non-display area B is located at the edge of each side of the front.
  • the side of the orthographic projection of the lamp panel 20 on the front side may coincide with the boundary m between the display area A and the non-display area B.
  • the non-display area B of the LCD screen 10 constitutes the splicing seam of the splicing screen.
  • the lamp panel 20 By setting the lamp panel 20 on the edge of the LCD screen 10, the lamp panel 20 is projected on the front side.
  • One side coincides with the boundary m between the display area A and the non-display area B, so that the first part 211 extends along the edge of the front, and the non-display area B can be completely covered by the light board 20, eliminating seams, and does not block the display of the display area A Picture.
  • the orthographic projection of the light board 20 on the front side may be rectangular, that is, the first part 211 may be rectangular.
  • the splicing seams between two adjacent liquid crystal display screens 10 in the splicing screen are usually rectangular, and the orthographic projection of the lamp panel 20 on the front is rectangular, which can better shield the splicing seams.
  • the light board 20 may further include a reinforcing board 24.
  • the reinforcing plate 24 has two opposite plate surfaces. One side of the bonding part 2121 may be bonded to the front surface of the liquid crystal display 10, the other side of the bonding part 2121 may be bonded to one side of the reinforcing plate 24, and the first part 211 may be bonded to the other side of the reinforcing plate 24.
  • the reinforcing plate 24 can support the flexible circuit board 21. By providing the reinforcing plate 24, the strength of the light board 20 is improved, and the flexible circuit board 21 can be prevented from being damaged.
  • the reinforcing plate 24 may be a flat panel or a curved panel.
  • the reinforcing plate 24 of the lamp panel 20 may be a flat panel.
  • the reinforcing plate 24 of the light board 20 may be a curved panel, so that the light board 20 can better fit the curvature of the curved display screen, and further enhance the visual effect.
  • the reinforcing plate 24 may be made of PET (Polyethylene glycol terephthalate) or PI (Polyimide).
  • the edge of the front surface of the liquid crystal display screen 10 may have a stepped surface 12 a for positioning the lamp panel 20.
  • the structure of the liquid crystal display screen 10 may refer to FIG. 2.
  • the liquid crystal display screen 10 may include a display panel 11, a polarizer 12 and a backlight source 13, and a polarizer 12 is provided on both sides of the display panel 11.
  • the backlight source 13 may be an edge-type backlight source or a direct-type backlight source.
  • other optical films may be disposed between the backlight source 13 and the display panel 11, in addition to a polarizer 12.
  • the optical films may include, but are not limited to, diffusers and prism films.
  • the orthographic projection of the polarizer 12 on the side of the display panel 11 away from the backlight 13 on the display panel 11 is located in the display panel 11, which makes the portion of the polarizer 12 beyond the polarizer 12 and the display panel 11 form a stepped surface 12 a.
  • the light board 20 can be attached to the stepped surface 12a.
  • the stepped surface 12a is used to position the lamp panel 20, which facilitates the installation of the lamp panel 20 on the front of the liquid crystal display screen 10, and improves the installation accuracy of the lamp panel 20.
  • the stepped surface 12a is used for positioning, so that the side of the orthographic projection of the light board 20 on the front coincides with the boundary m between the display area A and the non-display area B, so as to completely block the non-display area B, eliminate seams, and avoid Block the display screen of display area A. In this way, when the display device is displaying, the screen displayed on the liquid crystal display 10 and the screen displayed on the light panel 20 can be better spliced into one body, and the overall visual effect of the spliced screen is improved.
  • Fig. 5 is a partial structural diagram of Fig. 2.
  • a surface of the reinforcing plate 24 facing away from the first part 211 of the flexible circuit board 21 may have a positioning boss 241.
  • a part of the surface of the reinforcing plate 24 such as the surface 24a in FIG. 5
  • a side surface of the positioning boss 241 such as the surface 241a in FIG. 5
  • the top surface of the positioning boss 241 such as The surface 241b
  • the step structure on the reinforcing plate 24 can be matched with the polarizer 12 and the display panel 11, so that the light board 20 can be attached to the step surface 12a formed by the polarizer 12 and the display panel 11 to realize the alignment. Positioning of the light board 20.
  • the height D of the positioning boss 241 can be set according to the thickness d of the polarizer 12.
  • the height D of the positioning boss 241 can be the same as the thickness d of the polarizer 12, so that the lamp board 20 can fit the surface of the liquid crystal display screen 10 well.
  • the thickness of the two polarizers 12 may be the same, the thickness d of each polarizer 12 may be 0.15mm ⁇ 0.2mm, and the height D of the positioning boss 241 may also be 0.15mm ⁇ 0.2mm.
  • FIG. 6 is a schematic view of splicing between a display device and another display device provided by an embodiment of the present disclosure. As shown in FIG. 6, when assembling the splicing screen, the two stepped structures are respectively matched with the two liquid crystal display screens 10 spliced together.
  • FIG. 7 is a schematic diagram of a partial structure of a display device provided by an embodiment of the present disclosure.
  • the front of the liquid crystal display 10 of the display device is polygonal.
  • two light panels 20 are arranged along the same side of the front surface of the liquid crystal display screen 10, and the two light panels 20 are continuously arranged along the edge of the front surface.
  • the continuous arrangement means that the light panels 20 are arranged in sequence and there is no gap between the adjacent light panels 20.
  • the size of the flexible circuit board 21 in a single light board 20 can be reduced, and the manufacturing difficulty can be reduced.
  • three or more light panels 20 can also be arranged along the same side of the front of the liquid crystal display 10, and each light panel 20 is arranged along the edge of the front, and the number of light panels 20 can be arranged. It is determined according to the size of the liquid crystal display 10.
  • the LCD screen 10 used as a splicing screen is usually rectangular, and a light panel 20 can be provided on any side of the front of the LCD screen 10.
  • a light panel 20 can be provided on any side of the front of the LCD screen 10.
  • one side of the front of the liquid crystal display screen 10 may be provided with a light panel 20, or two adjacent sides of the front of the liquid crystal display screen 10 may be provided with a light panel 20, or the front side of the liquid crystal display screen 10 is not opposite to each other.
  • the two adjacent sides may be provided with light panels 20, or the three sides of the front of the liquid crystal display 10 may be provided with light panels 20, or the four sides of the front of the liquid crystal display 10 may be provided with light panels 20.
  • FIG. 8 is a partial schematic diagram of a display device provided by an embodiment of the present disclosure. As shown in FIG. The display device is spliced to obtain a large enough splicing screen.
  • FIG. 9 is a schematic diagram of a splicing method provided by an embodiment of the present disclosure, and the thicker black line in FIG. 9 represents the light board 20. As shown in FIG. 9, by splicing multiple display devices 100 shown in FIG. 8 in the manner of FIG. 9, splicing screens of any size can be spliced to meet different requirements.
  • FIG. 10 is a schematic diagram of the rear structure of a display device provided by an embodiment of the present disclosure. As shown in FIG. 10, the printed circuit board 30 may be located at the edge of the back of the liquid crystal display screen 10. The light board 20 and the printed circuit board 30 are arranged on the same side of the liquid crystal display 10, and the printed circuit board 30 is arranged at the edge position, so that the flexible circuit board 21 can be easily plugged into the printed circuit board 30.
  • the printed circuit board 30 may extend along the edge of the back of the liquid crystal display screen 10. In this way, if two or more light panels 20 are arranged on the same side of the front of the liquid crystal display screen 10, the light panels 20 arranged along the same side of the front can be easily connected to the printed circuit board 30.
  • two or more printed circuit boards 30 may be arranged along the same side of the back of the liquid crystal display screen 10, and each printed circuit board 30 is arranged along the edge of the back.
  • This arrangement is particularly suitable for the liquid crystal display screen 10 with a larger size, and is beneficial to reduce the area of a single printed circuit board 30.
  • the back of the liquid crystal display screen 10 can also be provided with a control circuit 40, and the control circuit 40 can be connected to the printed circuit board 30.
  • the control circuit 40 can be used to process the picture to be displayed, divide the picture to be displayed, provide the middle part of the picture to be displayed to the liquid crystal display 10, and provide the edge part of the picture to be displayed to the printed circuit board 30, so that the liquid crystal display 10
  • the middle part of the picture to be displayed can be displayed, and the light board 20 can be displayed on the edge of the picture to be displayed.
  • the control circuit 40 can refer to related technologies for processing the image to be displayed, which will not be described in detail here.
  • control circuit 40 may be fixed in the middle of the back of the liquid crystal display screen 10.
  • control circuit 40 may be fixed in the middle of the back of the liquid crystal display screen 10.
  • the multiple printed circuit boards 30 can all be connected to the control circuit 40.
  • the control circuit 40 and the printed circuit board 30 can be connected by a data transmission line 50, the control circuit 40 can have a first transmission line interface 41, and the printed circuit board 30 can have a second transmission line interface 31. By setting the first transmission line interface 41 and the second transmission line interface 31. The connection and disassembly of the data transmission line 50 can be facilitated.
  • the control circuit 40 may have multiple first transmission line interfaces 41 to facilitate the connection of multiple printed circuit boards 30.
  • FIG. 11 is a schematic diagram of a partial structure of a display device provided by an embodiment of the present disclosure.
  • the display device may further include a back cover 60.
  • the back cover 60 is located on the back of the liquid crystal display 10
  • the printed circuit board 30 is located in the space enclosed by the back cover 60 and the liquid crystal display 10
  • the back cover 60 has an opening 60a
  • the flexible circuit board 21 is located in the opening 60a.
  • the back cover 60 can provide protection to the printed circuit board 30 to prevent damage to the printed circuit board 30 from affecting the normal operation of the display device.
  • the flexible circuit board 21 of the light board 20 can be connected to the printed circuit board 30 through the opening 60a, or the flexible circuit board 21 can be removed from the printed circuit board 30 through the opening 60a, and the flexible circuit board can be disconnected. 21 is connected to the printed circuit board 30.
  • control circuit 40 as before can also be located in the space enclosed by the back cover 60 and the liquid crystal display 10 to protect the control circuit 40.
  • the front projection of the back cover 60 on the back of the liquid crystal display 10 can be overlapped with the liquid crystal display 10 to cover all the back of the liquid crystal display 10 in the back cover 60 to provide better protection.
  • the back cover 60 may have a side wall 61 connected to the liquid crystal display 10, the opening 60a may be located on the side wall 61, and the opening 60a may be provided on the side wall 61 to facilitate the insertion of the flexible circuit board 21 into In the opening 60a, it is more convenient to operate when disassembling the LCD screen 10 and the lamp panel 20.
  • the opening 60a on the side wall 61 of the back cover 60 can also be used as a focus point, which is convenient for the operator to put in his fingers to remove the back cover 60.
  • the side wall 61 of the back cover 60 may be parallel or coplanar with the side surface of the liquid crystal display 10. In this way, it is easier for the operator to disassemble and connect the flexible circuit board 21.
  • the opening 60a may be in a strip shape, the opening 60a may be parallel to the back of the liquid crystal display 10, and the middle of the side of the opening 60a away from the back may also have an escape notch 60b.
  • the strip-shaped opening 60a is parallel to the back of the liquid crystal display screen 10, so that the flexible circuit board 21 can be easily extended into the back cover 60, and the flexible circuit board 21 can be prevented from being twisted.
  • the operator’s fingers can be inserted into the rear cover 60 through the avoidance notch 60b for operation, which is convenient for operation.
  • the flexible circuit board 21 is inserted into the printed circuit board 30 or the flexible circuit board 21 is separated from the printed circuit board 30.
  • the avoidance notch 60b may be arcuate.
  • the arcuate avoidance notch 60b has a smooth contour, which is beneficial to reduce stress concentration and can avoid scratching the operator.
  • the avoidance gap 60b can also be set in other shapes, such as a rectangle, a trapezoid, and the like.
  • the size of the avoidance gap 60b can be as small as possible on the basis that the operator's fingers can pass and operate, so that external dust and water droplets cannot easily enter the display device 100 through the avoidance gap 60b.
  • the back cover 60 may have a transparent structure, so that the operator can directly observe the structure inside the back cover 60 through the back cover 60, which makes it easier to connect the flexible circuit board 21 to the printed circuit board 30.
  • the back cover 60 may be made of optical resin.
  • FIG. 12 is a partial structural diagram of a splicing screen provided by an embodiment of the present disclosure. As shown in FIG. 12, the splicing screen includes two display devices 100 spliced with each other, and at least one of the two display devices 100 is shown in FIGS. Any of the display devices shown in FIG. 11.
  • the splicing screen may also include three or more display devices 100 spliced with each other, and at least one of the display devices 100 is any one of the display devices shown in FIGS. 1-11. Device.
  • the light board includes a flexible circuit board and a plurality of light-emitting diodes. Since the flexible circuit board includes a first part and a second part connected, more Two light-emitting diodes are located in the first part, the first part is located on the edge of the front of the LCD screen, the second part of the flexible circuit board extends from the outside of the LCD screen to the back of the LCD screen, and is detachable from the printed circuit board on the back of the LCD screen Ground connection, so you can control multiple light-emitting diodes to display images through the printed circuit board, and because the first part is located on the edge of the front of the LCD screen, the images displayed by multiple light-emitting diodes can block the edge area of the LCD screen.
  • the splicing can be reduced or even eliminated, thereby improving the visual effect.
  • the lamp board is installed on the LCD screen
  • the second part extends from the LCD screen to the back of the LCD screen and can be detachably plugged into the printed circuit board, so when the light-emitting diode fails, it can be disconnected
  • the second part is connected to the printed circuit board, disconnect the first part from the front of the LCD screen, remove the light board for maintenance, or directly replace the new light board. You only need to install the light board to the On the front of the LCD screen, the second part is connected with the printed circuit board, so there is no need to disassemble the LCD screen, which is convenient for maintenance.

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Abstract

一种显示装置和拼接屏，其中显示装置包括液晶显示屏（10）、灯板（20）和印刷电路板（30），灯板（20）包括柔性电路板（21）和多个发光二极管（22），柔性电路板（21）包括相连的第一部分（211）和第二部分（212），多个发光二极管（22）位于第一部分（211），第一部分（211）位于液晶显示屏（10）的正面的边缘，第二部分（212）从液晶显示屏（10）的外部延伸至液晶显示屏（10）的背面，印刷电路板（30）位于背面，第二部分（212）可拆卸地插接在印刷电路板（30）上。由于第一部分（211）位于液晶显示屏（10）的正面的边缘，因此多个发光二极管（22）显示的画面可以遮挡住液晶显示屏（10）的边缘区域，在多个显示装置拼接成拼接屏时就可以减小甚至消除拼缝，从而提高视觉效果。

Description

显示装置和拼接屏
本公开要求于2020年2月24日提交的申请号为202010113719.1、发明名称为“显示装置和拼接屏”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本公开涉及显示设备领域，特别涉及一种显示装置和拼接屏。
背景技术
液晶显示装置是一种常见的显示器件，具有厚度小、重量轻等优点，广泛应用于人们的日常生活中。
由于单个液晶显示装置的面积有限，需要大面积显示时，通常会采用拼接屏。拼接屏就是将多个单独的液晶显示装置的边框边缘对齐，拼接起来后所构成的面积更大的显示器件。在液晶显示装置进行拼接时，相邻的液晶显示装置之间会出现拼缝，拼缝的存在导致拼接屏显示的画面被分割，破坏了图像的连续性和完整性，严重影响拼接屏的视觉效果。
发明内容
本公开实施例提供了一种显示装置和拼接屏。所述技术方案如下：
一方面，本公开实施例提供了一种显示装置，所述显示装置包括液晶显示屏、灯板和印刷电路板，所述灯板包括柔性电路板和多个发光二极管，所述柔性电路板包括相连的第一部分和第二部分，所述多个发光二极管位于所述第一部分，所述第一部分位于所述液晶显示屏的正面的边缘，所述第二部分从所述液晶显示屏的外部延伸至所述液晶显示屏的背面，所述印刷电路板位于所述背面，所述第二部分可拆卸地插接在所述印刷电路板上。
可选地，所述第二部分包括贴合部和延伸部，所述第一部分、所述贴合部和所述延伸部依次相连，所述贴合部的一面贴合在所述正面的边缘，所述第一 部分叠置在所述贴合部远离所述液晶显示屏的一面，所述延伸部与所述贴合部相连，所述延伸部可拆卸地插接在所述印刷电路板上。
可选地，所述第一部分从所述正面的中部向外超出所述正面的边缘。
可选地，所述灯板还包括加强板，所述加强板具有两个相对的板面，所述贴合部的另一面贴合在所述加强板的一面，所述第一部分贴合在所述加强板的另一面。
可选地，所述液晶显示屏的正面的边缘具有用于定位的台阶面，所述灯板与所述台阶面贴合。
可选地，所述液晶显示屏包括显示面板和位于所述显示面板一侧面的偏光片，所述偏光片在所述显示面板上的正投影位于所述显示面板内，所述偏光片和所述显示面板超出所述偏光片的部分形成所述台阶面。
可选地，所述液晶显示屏的正面包括位于所述正面中部的显示区域和位于所述正面边缘的非显示区域，所述灯板在所述正面的正投影的一边与所述显示区域和所述非显示区域的界线重合。
可选地，所述液晶显示屏的正面呈多边形，沿所述正面的同一边布置有至少两个所述灯板，各个所述灯板沿所述正面的边缘连续排布。
可选地，所述印刷电路板位于所述背面的边缘，所述灯板和所述印刷电路板位于所述液晶显示屏的同一边。
可选地，所述显示装置还包括后盖，所述后盖位于所述液晶显示屏的背面，所述印刷电路板位于所述后盖与所述液晶显示屏围成的空间中，所述后盖上具有开口，所述柔性电路板穿过所述开口。
可选地，所述后盖具有与所述液晶显示屏相连的侧壁，所述开口位于所述侧壁上。
可选地，所述开口呈条状，所述开口平行于所述液晶显示屏的背面，所述开口的远离所述背面的一边的中部具有一避让缺口。
可选地，所述多个发光二极管阵列分布，相邻的所述发光二极管的间距与所述液晶显示屏的像素间距相同。
可选地，所述灯板还包括透光灯罩，所述透光灯罩罩设在所述发光二极管外。
另一方面，本公开实施例还提供了一种拼接屏，所述拼接屏包括相互拼接的至少两个显示装置，所述至少两个显示装置中至少包括一个如前一方面所述的显示装置。
附图说明
为了更清楚地说明本公开实施例中的技术方案，下面将对实施例描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本公开的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1是本公开实施例提供的一种显示装置的结构图；
图2是本公开实施例提供的一种显示装置的局部结构示意图；
图3是图2中的柔性电路板的展开结构图；
图4是本公开实施例提供的一种显示装置的俯视图；
图5是图2的局部结构示意图；
图6是本公开实施例提供的一种显示装置与另一显示装置的拼接示意图；
图7是本公开实施例提供的一种显示装置的局部结构示意图；
图8是本公开实施例提供的一种显示装置的局部示意图；
图9是本公开实施例提供的一种拼接方式示意图；
图10是本公开实施例提供的一种显示装置的背面结构示意图；
图11是本公开实施例提供的一种显示装置的局部结构示意图；
图12是本公开实施例提供的一种拼接屏的局部结构示意图。
具体实施方式
为使本公开的目的、技术方案和优点更加清楚，下面将结合附图对本公开实施方式作进一步地详细描述。
图1是本公开实施例提供的一种显示装置的结构图，如图1所示，该显示装置包括液晶显示屏10、灯板20和印刷电路板30。灯板20包括柔性电路板21和多个发光二极管22。图1中所示的虚线结构为进行拼接的另一个显示装置。
如图1所示，柔性电路板21包括相连的第一部分211和第二部分212。多个发光二极管22位于第一部分211。第一部分211位于液晶显示屏10的正面的 边缘，第二部分212从液晶显示屏10的外部延伸至液晶显示屏10的背面。
在本公开实施例中，正面为液晶显示屏10显示画面的一面，背面为与正面相对的表面。印刷电路板30位于液晶显示屏10的背面，第二部分212可拆卸地插接在印刷电路板30上。
通过设置液晶显示屏、灯板和印刷电路板，液晶显示屏的正面可以进行画面显示，灯板包括柔性电路板和多个发光二极管，由于柔性电路板包括相连的第一部分和第二部分，多个发光二极管位于第一部分，第一部分位于液晶显示屏的正面的边缘，柔性电路板的第二部分从液晶显示屏外延伸至液晶显示屏的背面，与位于液晶显示屏背面的印刷电路板可拆卸地连接，因此可以通过印刷电路板控制多个发光二极管发光显示画面，并且由于第一部分位于液晶显示屏的正面的边缘，因此多个发光二极管显示的画面可以遮挡住液晶显示屏的边缘区域，在多个显示装置拼接成拼接屏时就可以减小甚至消除拼缝，从而提高视觉效果。
此外，由于柔性电路板21的第二部分212是从液晶显示屏10的外部延伸至液晶显示屏10的背面的，并且与位于液晶显示屏10背面的印刷电路板30可拆卸地连接，这样在发光二极管22出现故障时，可以断开第二部分212与印刷电路板30的连接，断开第一部分211与液晶显示屏10的正面的连接，拆卸下灯板20进行维修，或是直接更换新的灯板20，在组装时也只需要将灯板20安装到液晶显示屏10的正面，将第二部分212与印刷电路板30连接，不需要拆开液晶显示屏10，维修方便。
可选地，多个发光二极管22的排列方式可以与液晶显示屏10的像素的排列方式相同，以使灯板20的显示效果与液晶显示屏10的显示效果更接近。
在本公开实施例中，多个发光二极管22阵列分布，相邻的发光二极管22的间距可以与液晶显示屏10的像素间距相同。根据液晶显示屏10的像素间距设置发光二极管22的间距，能够使灯板20的显示效果与液晶显示屏10的显示效果更接近，有利于提高显示装置和拼接屏整体的显示效果。
可选地，多个发光二极管22的颜色也可以与液晶显示屏10的像素的颜色相同。示例性地，多个发光二极管22可以包括红光发光二极管、绿光发光二极管和蓝光发光二极管，液晶显示屏10通常具有红色、绿色和蓝色这三种颜色的像素，发光二极管22也采用红色、绿色和蓝色的配置，使灯板20的显示效果 与液晶显示屏10的显示效果更接近。
发光二极管22可以是封装好的发光二极管22，封装后的发光二极管22使用寿命更长。
图2是本公开实施例提供的一种显示装置的局部结构示意图。如图2所示，灯板20还可以包括透光灯罩23，透光灯罩23罩设在发光二极管22外。透光灯罩23可以对发光二极管22提供保护，同时可以使发光二极管22发出的光显得更柔和，避免出现从某一方向观察时出现特别刺眼的情况。透光灯罩23可以粘接在柔性电路板21上。
示例性地，透光灯罩23可以采用光学树脂制成，以利于透光。
灯板20上的所有发光二极管22可以位于同一透光灯罩23内。或者灯板20也可以包括多个透光灯罩23，每个透光灯罩23中设置有若干个发光二极管22，例如每个透明灯罩23中设置有一个发光二极管22，或每个透明灯罩23中设置有3个发光二极管22。
如图2所示，柔性电路板21的第二部分212可以包括贴合部2121和第一部分211。第一部分211、贴合部2121和延伸部2122依次相连，贴合部2121的一面贴合在正面的边缘，第一部分211叠置在贴合部2121远离液晶显示屏10的一面，延伸部2122与贴合部2121相连，延伸部2122可拆卸地插接在印刷电路板30上。柔性电路板21通过第二部分212的贴合部2121安装到液晶显示屏10的正面，延伸部2122可以从液晶显示屏10的侧面绕到液晶显示屏10的背面连接印刷电路板30，其中液晶显示屏10的侧面即为连接液晶显示屏10的背面和液晶显示屏10的正面的表面。这样只需要断开柔性电路板21与印刷电路板30的连接，断开贴合部2121与液晶显示屏10正面的连接，就可以移除灯板20，完成灯板20的拆卸。
第一部分211可以从液晶显示屏10的正面的中部向外超出液晶显示屏10的正面的边缘，这样在设置拼接屏时，可以将第一部分211超出正面的边缘的部分搭接在相邻的显示装置上，利用该部分遮挡相邻的显示装置的非显示区域，减小拼缝。
液晶显示屏10可以是平面显示屏，也可以是曲面显示屏。通过平面显示屏可以拼接面积更大的平面显示屏，也可以拼接面积更大的曲面显示屏，曲面显示屏可以拼接面积更大的曲面显示屏。由于柔性电路板21可以弯曲，因此在拼 接曲面显示屏时，柔性电路板21可以弯曲出一定的弧度，使灯板20更贴合曲面显示屏的弧度，进一步提升视觉效果。
灯板20可以粘贴在液晶显示屏10上。示例性地，灯板20可以通过胶带进行粘接。例如可以采用双面树脂压敏胶带粘贴。双面树脂压敏胶带的厚度可以为0.008mm～0.012mm，双面树脂压敏胶带具有厚度薄的特点，使用双面树脂压敏胶带进行粘贴有利于降低灯板20与液晶显示屏10的高度差，进一步提升显示装置的视觉效果。
图3是图2中的柔性电路板的展开结构图。如图3所示，柔性电路板21的第二部分212上可以设置有金手指2120。印刷电路板30上可以具有金手指连接器，柔性电路板21的第二部分212可以通过金手指插接在金手指连接器中。采用金手指和金手指连接器进行连接，拆装方便。
图4是本公开实施例提供的一种显示装置的俯视图。如图4所示，液晶显示屏10的正面包括位于正面中部的显示区域A和位于正面边缘的非显示区域B。非显示区域B围绕显示区域A，非显示区域B位于正面每一边的边缘。灯板20在正面的正投影的一边可以与显示区域A和非显示区域B的界线m重合。液晶显示屏10在进行拼接时，液晶显示屏10的非显示区域B构成了拼接屏的拼缝，通过在液晶显示屏10的边缘设置灯板20，并使灯板20在正面的正投影的一边与显示区域A和非显示区域B的界线m重合，这样第一部分211沿正面的边缘延伸，可以通过灯板20完全遮挡住非显示区域B，消除拼缝，并且不遮挡显示区域A的显示画面。
如图4所示，灯板20在正面的正投影可以呈矩形，也即是第一部分211可以呈矩形。拼接屏中相邻的两个液晶显示屏10之间的拼缝通常是矩形的，灯板20在正面的正投影呈矩形可以更好地遮挡拼缝。
可选地，如图2所示，灯板20还可以包括加强板24。加强板24具有两个相对的板面。贴合部2121的一面可以贴合在液晶显示屏10的正面，贴合部2121的另一面可以贴合在加强板24的一面，第一部分211可以贴合在加强板24的另一面。加强板24可以支撑柔性电路板21，通过设置加强板24，提高了灯板20的强度，能够避免柔性电路板21破损。
可选地，加强板24可以是平面板，也可以是曲面板，在拼接平面显示屏时，灯板20的加强板24可以是平面板。在拼接曲面显示屏时，灯板20的加强板24 可以是曲面板，使得灯板20可以更好地贴合曲面显示屏的弧度，进一步提升视觉效果。
示例性地，加强板24可以采用PET(聚对苯二甲酸乙二醇酯，Polyethylene glycol terephthalate)或PI(聚酰亚胺，Polyimide)制成。
可选地，液晶显示屏10的正面的边缘可以具有用于定位灯板20的台阶面12a。液晶显示屏10的结构可以参照图2，液晶显示屏10可以包括显示面板11、偏光片12和背光源13，显示面板11的两侧各设置有一个偏光片12。背光源13可以是侧入式背光源，也可以是直下式背光源。在背光源13与显示面板11之间，除了设置有一个偏光片12外，还可以设置有其他的光学膜片，该光学膜片可以包括但不限于是扩散片、棱镜片。位于显示面板11远离背光源13一侧面的偏光片12在显示面板11上的正投影位于显示面板11内，这使得偏光片12超出偏光片12的部分与显示面板11形成了一台阶面12a。
灯板20可以与台阶面12a贴合。通过灯板20与台阶面12a贴合，利用台阶面12a对灯板20进行定位，方便将灯板20安装到液晶显示屏10的正面，提高灯板20的安装精度。采用台阶面12a进行定位，可以使灯板20在正面的正投影的一边刚好与显示区域A和非显示区域B的界线m重合，以将非显示区域B完全遮挡住，消除拼缝，并且不遮挡显示区域A的显示画面。这样显示装置在显示时，液晶显示屏10显示的画面与灯板20显示的画面能够更好地拼接为一体，提升拼接屏整体的视觉效果。
图5是图2的局部结构示意图。如图5所示，加强板24背离柔性电路板21的第一部分211的一板面可以具有定位凸台241。通过设置定位凸台241，使得加强板24的部分表面(如图5中的表面24a)、定位凸台241的一个侧面(如图5中的表面241a)以及定位凸台241的顶面(如图5中的表面241b)构成一台阶结构(如图5中每个椭圆内的结构)。这样在安装灯板20时，加强板24上的台阶结构可以与偏光片12、显示面板11配合，使灯板20能够与由偏光片12和显示面板11形成的台阶面12a贴合，实现对灯板20的定位。
定位凸台241的高度D可以根据偏光片12的厚度d进行设置。例如定位凸台241的高度D可以与偏光片12的厚度d一致，以使得灯板20可以与液晶显示屏10的表面较好地吻合。两个偏光片12的厚度可以相同，每个偏光片12的厚度d可以为0.15mm～0.2mm，定位凸台241的高度D也可以为0.15mm～0.2mm。
定位凸台241可以位于加强板24的中部，这样在灯板20上形成有两个台阶结构。图6是本公开实施例提供的一种显示装置与另一显示装置的拼接示意图。如图6所示，在组装拼接屏时，两个台阶结构分别与拼接在一起的两个液晶显示屏10配合。
图7是本公开实施例提供的一种显示装置的局部结构示意图。该显示装置的液晶显示屏10的正面呈多边形。如图7所示，沿液晶显示屏10的正面的同一边布置有两个灯板20，两个灯板20沿正面的边缘连续排布。连续排布是指各灯板20依次排布且相邻的灯板20之间无间隙。对于面积较大的液晶显示屏10，通过在正面的同一边布置两个灯板20，可以减小单个灯板20中柔性电路板21的尺寸，降低制作难度。
在其他可能的实现方式中，沿液晶显示屏10的正面的同一边也可以布置三个或三个以上的灯板20，各个灯板20沿正面的边缘排布，灯板20的布置数量可以根据液晶显示屏10的大小确定。
用作拼接屏的液晶显示屏10通常呈矩形，液晶显示屏10正面的任意一条边处均可以设置灯板20。示例性地，液晶显示屏10正面的一条边处可以设置有灯板20，或者，液晶显示屏10正面相邻的两条边处可以均设置有灯板20，或者液晶显示屏10正面不相邻的两条边处可以均设置有灯板20，或者液晶显示屏10正面的三条边处可以均设置有灯板20，或者液晶显示屏10正面的四条边处可以均设置有灯板20。
图8是本公开实施例提供的一种显示装置的局部示意图，如图8所示，液晶显示屏10正面相邻的两条边处可以均设置有灯板20，这样就可以通过多个相同的显示装置进行拼接，得到足够大的拼接屏。
图9是本公开实施例提供的一种拼接方式示意图，图9中较粗的黑色线条表示灯板20。如图9所示，通过将多个图8中所示的显示装置100采用图9的方式进行拼接，就可以拼接出任意大小的拼接屏，满足不同的需求。
灯板20和印刷电路板30可以位于液晶显示屏10的同一边，这样柔性电路板21的第二部分212只需要设置较短的长度就可以连接到印刷电路板30上。图10是本公开实施例提供的一种显示装置的背面结构示意图。如图10所示，印刷电路板30可以位于液晶显示屏10的背面的边缘。将灯板20和印刷电路板30设置在液晶显示屏10的同一边，并将印刷电路板30设置在边缘位置，能够 方便将柔性电路板21插接到印刷电路板30上。
可选地，印刷电路板30可以沿液晶显示屏10的背面的边缘延伸。这样若液晶显示屏10的正面的同一边布置有两个或以上的灯板20，沿正面的同一边布置的灯板20都可以较方便地连接到印刷电路板30上。
可选地，沿液晶显示屏10的背面的同一边也可以布置有两个或两个以上的印刷电路板30，各个印刷电路板30沿背面的边缘排布。这样设置尤其适用于尺寸较大的液晶显示屏10，有利于减小单个印刷电路板30的面积。
液晶显示屏10的背面还可以设置有控制电路40，控制电路40可以与印刷电路板30连接。控制电路40可以用于处理待显示画面，对待显示画面进行分割，并将待显示画面的中部提供给液晶显示屏10，将待显示画面的边缘部分提供给印刷电路板30，使得液晶显示屏10可以对待显示画面的中部进行显示，灯板20可以对待显示画面的边缘进行显示。控制电路40对待显示画面的处理可以参考相关技术，此处不详述。
示例性地，控制电路40可以固定在液晶显示屏10背面的中部。本实施例中，通过将印刷电路板30、控制电路40均设置在液晶显示屏10的背面，也方便进行维修。
如图10所示，若液晶显示屏10的背面设置有多个印刷电路板30，多个印刷电路板30均可以与控制电路40连接。
控制电路40与印刷电路板30可以通过数据传输线50连接，控制电路40可以具有第一传输线接口41，印刷电路板30可以具有第二传输线接口31，通过设置第一传输线接口41和第二传输线接口31，能够方便数据传输线50的连接和拆卸。控制电路40上可以具有多个第一传输线接口41，方便连接多个印刷电路板30。
图11是本公开实施例提供的一种显示装置的局部结构示意图。如图11所示，该显示装置还可以包括后盖60。后盖60位于液晶显示屏10的背面，印刷电路板30位于后盖60与液晶显示屏10围成的空间中，后盖60上具有开口60a，柔性电路板21位于开口60a中。通过后盖60可以对印刷电路板30提供保护，避免印刷电路板30受损影响显示装置的正常工作。在拆装显示装置时，灯板20的柔性电路板21可以通过开口60a连接到印刷电路板30上，或是通过开口60a从印刷电路板30上取下柔性电路板21，断开柔性电路板21与印刷电路板30的 连接。
该显示装置中，如前的控制电路40也可以位于后盖60与液晶显示屏10围成的空间中，以对控制电路40进行保护。后盖60在液晶显示屏10的背面的正投影可以与液晶显示屏10重合，以将液晶显示屏10的背面全部罩在后盖60内，以更好地提供保护作用。
如图11所示，后盖60可以具有与液晶显示屏10相连的侧壁61，开口60a可以位于侧壁61上，将开口60a设置在侧壁61上，可以方便将柔性电路板21插入到开口60a内，在拆装液晶显示屏10和灯板20时更加便于操作。此外，在需要拆卸后盖60时，后盖60的侧壁61上的开口60a还可以作为着力点，方便操作人员伸入手指将后盖60取下。
后盖60的侧壁61可以与液晶显示屏10的侧面平行或共面。这样更容易操作人员进行柔性电路板21的拆接。
示例性地，开口60a可以呈条状，开口60a可以平行于液晶显示屏10的背面，开口60a的远离背面的一边的中部还可以具有一避让缺口60b。呈条状的开口60a平行于液晶显示屏10的背面，可以方便将柔性电路板21伸到后盖60中，避免柔性电路板21扭曲。通过在开口60a的远离背面的一边的中部设置避让缺口60b，在拆装液晶显示屏10和灯板20时，操作人员的手指可以通过避让缺口60b伸入到后盖60中进行操作，方便将柔性电路板21插接到印刷电路板30上或是将柔性电路板21与印刷电路板30分离。
如图11所示，避让缺口60b可以呈弓形。弓形的避让缺口60b，轮廓圆滑，利于降低应力集中，同时可以避免划伤操作人员。在其他可能的实现方式中，避让缺口60b也可以设置为其他形状，例如矩形、梯形等。避让缺口60b的大小可以在操作人员的手指能够通过并进行操作的基础上尽力小，使外部的粉尘、水滴不容易通过避让缺口60b进入到显示装置100内部。
可选地，后盖60可以是透明结构，这样操作人员可以直接透过后盖60观察到后盖60内的结构，更加方便将柔性电路板21连接到印刷电路板30上。示例性地，后盖60可以采用光学树脂制成。
图12是本公开实施例提供的一种拼接屏的局部结构示意图，如图12所示，该拼接屏包括相互拼接的两个显示装置100，两个显示装置100中的至少一个为图1～图11所示的任一种显示装置。
在本公开其他可能的实现方式中，该拼接屏也可以包括相互拼接的三个或三个以上的显示装置100，其中至少有一个显示装置100是图1～图11所示的任一种显示装置。
通过设置液晶显示屏、灯板和印刷电路板，液晶显示屏的正面可以进行画面显示，灯板包括柔性电路板和多个发光二极管，由于柔性电路板包括相连的第一部分和第二部分，多个发光二极管位于第一部分，第一部分位于液晶显示屏的正面的边缘，柔性电路板的第二部分从液晶显示屏外延伸至液晶显示屏的背面，与位于液晶显示屏背面的印刷电路板可拆卸地连接，因此可以通过印刷电路板控制多个发光二极管发光显示画面，并且由于第一部分位于液晶显示屏的正面的边缘，因此多个发光二极管显示的画面可以遮挡住液晶显示屏的边缘区域，在多个显示装置拼接成拼接屏时就可以减小甚至消除拼缝，从而提高视觉效果。由于灯板安装在所述液晶显示屏上，第二部分从液晶显示屏外延伸至液晶显示屏的背面并可拆卸地插接在印刷电路板上，因此在发光二极管出现故障时，可以断开第二部分与印刷电路板的连接，断开第一部分与液晶显示屏的正面的连接，拆卸下灯板进行维修，或是直接更换新的灯板，在组装时也只需要将灯板安装到液晶显示屏的正面，将第二部分与印刷电路板连接，不需要拆开液晶显示屏，维修方便。
以上所述仅为本公开的可选实施例，并不用以限制本公开，凡在本公开的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本公开的保护范围之内。

Claims (15)

  1. 一种显示装置，包括液晶显示屏(10)、灯板(20)和印刷电路板(30)，
    所述灯板(20)包括柔性电路板(21)和多个发光二极管(22)，所述柔性电路板(21)包括相连的第一部分(211)和第二部分(212)，所述多个发光二极管(22)位于所述第一部分(211)，所述第一部分(211)位于所述液晶显示屏(10)的正面的边缘，所述第二部分(212)从所述液晶显示屏(10)的外部延伸至所述液晶显示屏(10)的背面，
    所述印刷电路板(30)位于所述背面，所述第二部分(212)可拆卸地插接在所述印刷电路板(30)上。
  2. 根据权利要求1所述的显示装置，其中，所述第二部分(212)包括贴合部(2121)和延伸部(2122)，所述第一部分(211)、所述贴合部(2121)和所述延伸部(2122)依次相连，所述贴合部(2121)的一面贴合在所述正面的边缘，所述第一部分(211)叠置在所述贴合部(2121)远离所述液晶显示屏(10)的一面，所述延伸部(2122)与所述贴合部(2121)相连，所述延伸部(2122)可拆卸地插接在所述印刷电路板(30)上。
  3. 根据权利要求2所述的显示装置，其中，所述第一部分(211)从所述正面的中部向外超出所述正面的边缘。
  4. 根据权利要求2所述的显示装置，其中，所述灯板(20)还包括加强板(24)，所述加强板(24)具有两个相对的板面，所述贴合部(2121)的另一面贴合在所述加强板(24)的一面，所述第一部分(211)贴合在所述加强板(24)的另一面。
  5. 根据权利要求1～4任一项所述的显示装置，其中，所述液晶显示屏(10)的正面的边缘具有用于定位所述灯板(20)的台阶面(12a)，所述灯板(20)与所述台阶面(12a)贴合。
  6. 根据权利要求5所述的显示装置，其中，所述液晶显示屏(10)包括显示面板(11)和位于所述显示面板(11)一侧面的偏光片(12)，所述偏光片(12)在所述显示面板(11)上的正投影位于所述显示面板(11)内，所述偏光片(12)和所述显示面板(11)超出所述偏光片(12)的部分形成所述台阶面(12a)。
  7. 根据权利要求1～6任一项所述的显示装置，其中，所述液晶显示屏(10)的正面包括位于所述正面中部的显示区域(A)和位于所述正面边缘的非显示区域(B)，所述灯板(20)在所述正面的正投影的一边与所述显示区域(A)和所述非显示区域(B)的界线重合。
  8. 根据权利要求1～7任一项所述的显示装置，其中，所述液晶显示屏(10)的正面呈多边形，沿所述正面的同一边布置有至少两个所述灯板(20)，各个所述灯板(20)沿所述正面的边缘连续排布。
  9. 根据权利要求8所述的显示装置，其中，所述印刷电路板(30)位于所述背面的边缘，所述灯板(20)和所述印刷电路板(30)位于所述液晶显示屏(10)的同一边。
  10. 根据权利要求1～9任一项所述的显示装置，其中，所述显示装置还包括后盖(60)，所述后盖(60)位于所述液晶显示屏(10)的背面，所述印刷电路板(30)位于所述后盖(60)与所述液晶显示屏(10)围成的空间中，所述后盖(60)上具有开口(60a)，所述柔性电路板(21)穿过所述开口(60a)。
  11. 根据权利要求10所述的显示装置，其中，所述后盖(60)具有与所述液晶显示屏(10)相连的侧壁(61)，所述开口(60a)位于所述侧壁(61)上。
  12. 根据权利要求11所述的显示装置，其中，所述开口(60a)呈条状，所述开口(60a)平行于所述液晶显示屏(10)的背面，所述开口(60a)的远离所述背面的一边的中部具有一避让缺口(60b)。
  13. 根据权利要求1～12任一项所述的显示装置，其中，所述多个发光二极管(22)阵列分布，相邻的所述发光二极管(22)的间距与所述液晶显示屏(10)的像素间距相同。
  14. 根据权利要求1～13任一项所述的显示装置，其中，所述灯板(20)还包括透光灯罩(23)，所述透光灯罩(23)罩设在所述发光二极管(22)外。
  15. 一种拼接屏，所述拼接屏包括相互拼接的至少两个显示装置，所述至少两个显示装置中至少包括一个如权利要求1～14任一项所述的显示装置。
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