WO2020237838A1 - 胶框、背光模组及显示装置 - Google Patents

胶框、背光模组及显示装置 Download PDF

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Publication number
WO2020237838A1
WO2020237838A1 PCT/CN2019/100535 CN2019100535W WO2020237838A1 WO 2020237838 A1 WO2020237838 A1 WO 2020237838A1 CN 2019100535 W CN2019100535 W CN 2019100535W WO 2020237838 A1 WO2020237838 A1 WO 2020237838A1
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WO
WIPO (PCT)
Prior art keywords
supporting
printed circuit
circuit board
flexible printed
plastic frame
Prior art date
Application number
PCT/CN2019/100535
Other languages
English (en)
French (fr)
Inventor
周政
Original Assignee
武汉华星光电技术有限公司
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 武汉华星光电技术有限公司 filed Critical 武汉华星光电技术有限公司
Priority to US16/492,510 priority Critical patent/US11287695B2/en
Publication of WO2020237838A1 publication Critical patent/WO2020237838A1/zh

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Classifications

    • 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
    • G02F1/1345—Conductors connecting electrodes to cell terminals
    • 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
    • G02F1/133602—Direct backlight
    • G02F1/133608—Direct backlight including particular frames or supporting 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
    • G02F1/133308—Support structures for LCD panels, e.g. frames or bezels
    • G02F1/133317—Intermediate frames, e.g. between backlight housing and front frame
    • 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
    • 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
    • H05K1/028—Bending or folding regions of flexible printed circuits
    • 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
    • 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

  • This application relates to the field of display technology, in particular to a plastic frame, a backlight module and a display device.
  • in-vehicle display devices usually bond the flexible printed circuit board to the thin film transistor array substrate of the liquid crystal display panel by hot pressing, and then assemble the liquid crystal display panel bound with the flexible printed circuit board to the backlight module by using a fixing tape
  • the flexible printed circuit board is placed in the avoidance groove of the plastic frame and bent to the back of the backlight module, the flexible printed circuit board is fixed to the thin film transistor array substrate at one end during the assembly process.
  • applying force to the thin film transistor array substrate causes the cell thickness of the position where the liquid crystal display panel is bound to the flexible printed circuit board to change, resulting in uneven brightness when light passes through the liquid crystal display panel, that is, the Mura phenomenon.
  • the purpose of the present application is to provide a plastic frame, a backlight module, and a display device to solve the problem of uneven display brightness and darkness of the liquid crystal display panel when the flexible printed circuit board is assembled on the plastic frame of the backlight module.
  • a display device the display device includes a liquid crystal display panel, a flexible printed circuit board and a backlight module
  • the backlight module includes a plastic frame
  • the plastic frame has a first supporting surface, convex from the first supporting surface
  • the liquid crystal display panel is fixed to the first support surface
  • the first support The surface is provided with a support part located in the first avoidance groove
  • one end of the flexible printed circuit board is bound to the liquid crystal display panel, and the other end of the flexible printed circuit board passes through the first
  • the avoidance groove is bent to be placed on the back of the backlight module, and the support portion is used to support the flexible printed circuit board in the first avoidance groove.
  • a side wall at one end of the plastic frame is recessed to form a second avoidance groove, and the second avoidance groove and the first avoidance groove are located at the same end of the plastic frame and communicate with each other ,
  • the other end of the flexible printed circuit board passes through the first avoidance groove, is bent for the first time to pass through the second avoidance groove, and is bent for the second time to be placed in the backlight The back of the module.
  • the first side surface of the support portion close to the second relief groove is flush with the first surface of the second relief groove close to the support portion.
  • the liquid crystal display panel includes a thin film transistor array substrate, one end of the thin film transistor array substrate close to the support portion is bound to the flexible printed circuit board, and the thin film transistor array substrate is bound to the flexible printed circuit board.
  • An end of the printed circuit board and a second side surface close to the support portion is provided with a glue layer for fixing the flexible printed circuit board, and there is a first preset distance between the glue layer and the support portion.
  • the first plane of the thin film transistor array substrate is located on a side of the second plane of the supporting portion away from the first supporting surface, and the distance between the first plane and the second plane is The vertical distance is a second predetermined distance, the first plane of the thin film transistor array substrate is a plane where the flexible printed circuit board is bound, and the second plane of the support portion is a distance away from the support portion.
  • the plane of the first supporting surface is a first predetermined distance, the first plane of the thin film transistor array substrate is a plane where the flexible printed circuit board is bound, and the second plane of the support portion is a distance away from the support portion.
  • the length of the support portion in the first direction is greater than the length of the flexible printed circuit board in the first direction, and the first direction and the support portion point to the direction of the liquid crystal display panel It is perpendicular and parallel to the first supporting surface.
  • the length of the support portion along the first direction is equal to the length of the first relief groove along the first direction.
  • the support portion is a protrusion.
  • the surface of the support portion in contact with the flexible printed circuit board is an arc surface.
  • the supporting portion is a hard rubber block.
  • the support part and the plastic frame are integrally formed.
  • a plastic frame having a first supporting surface, a second supporting surface protruding from the first supporting surface, and a first supporting surface formed between the first supporting surface and the second supporting surface.
  • the first supporting surface is provided with a supporting part located in the first avoidance groove.
  • a side wall at one end of the plastic frame is recessed to form a second avoidance groove, and the second avoidance groove and the first avoidance groove are located at the same end of the plastic frame and communicate with each other .
  • the first side surface of the support portion close to the second relief groove is flush with the first surface of the second relief groove close to the support portion.
  • the supporting portion is a protrusion.
  • the supporting part is a hard rubber block.
  • the support portion and the plastic frame are integrally formed.
  • a backlight module comprising a plastic frame, the plastic frame having a first supporting surface, a second supporting surface protruding from the first supporting surface, and a structure formed by the first supporting surface and the A first avoiding groove is formed between the second supporting surfaces, and the first supporting surface is provided with a supporting part located in the first avoiding groove.
  • the side wall of one end of the plastic frame is recessed to form a second avoiding groove, and the second avoiding groove and the first avoiding groove are located at the same end of the plastic frame and communicate with each other .
  • the first side surface of the support portion close to the second relief groove is flush with the first surface of the second relief groove close to the support portion.
  • the present application provides a plastic frame, a backlight module, and a display device.
  • a support portion is provided in the first relief groove of the plastic frame for accommodating a flexible printed circuit board, so that the flexible printed circuit board is assembled on the backlight module.
  • the supporting part supports the flexible printed circuit board to prevent the flexible printed circuit board from being excessively pulled and applies force to the liquid crystal display panel through the end of the flexible printed circuit board bound with the liquid crystal display panel, resulting in the liquid crystal display
  • the local box thickness of the panel changes, and local unevenness of light and dark appears when the display device displays, thereby improving the user's visual experience.
  • FIG. 1 is a perspective view of a display device according to an embodiment of the application
  • FIG. 2 is a partial enlarged part of the display device shown in FIG. 1;
  • FIG. 3 is a schematic cross-sectional view of the display device shown in FIG. 1.
  • liquid crystal display panel 20 flexible printed circuit board; 30 backlight module; 40 support part;
  • 100 thin film transistor array substrate 101 color filter substrate; 100a first plane; 100b second side surface; 50 colloid layer; d1 first preset distance; 301 plastic frame; 301a first support surface; 301b second support surface; 3011 One avoidance slot; 3012 second avoidance slot; 302 back plate; 303 light guide plate; 304 point light source; 305 optical film; 40a second plane; 40b first side surface; 40c arc-shaped surface; 3012a first surface.
  • FIG. 1 is a perspective view of a display device according to an embodiment of the present application
  • FIG. 2 is a partial enlarged portion of the display device shown in FIG. 1
  • FIG. 3 is a schematic cross-sectional view of the display device shown in FIG.
  • the display device is an in-vehicle liquid crystal display device.
  • the display device includes a liquid crystal display panel 10, a flexible printed circuit board 20, a backlight module 30 and a supporting part 40.
  • the liquid crystal display panel 10 includes a thin film transistor array substrate 100 and a color filter substrate 101.
  • the color filter substrate 101 is disposed opposite to the thin film transistor array substrate 100.
  • the thin film transistor array substrate 100 extends to one side relative to the color filter substrate 101 to form an extension area.
  • the shapes of the thin film transistor array substrate 100 and the color filter substrate 101 are both rectangular parallelepipeds.
  • the thin film transistor array substrate 100 has a first flat surface 100 a opposite to the color filter substrate 101 and a second side surface 100 b close to the supporting portion 40.
  • the first plane 100a and the second side surface 100b are perpendicular to each other.
  • the second side surface 100 b is located at an end of the thin film transistor array substrate 100 close to the supporting portion 40.
  • the flexible printed circuit board 20 is bound to one end of the thin film transistor array substrate 100 close to the supporting part 40. Specifically, one end of the flexible printed circuit board 20 is fixed on the first plane 100a of the extension area of the thin film transistor array substrate 100 by hot pressing.
  • the thin film transistor array substrate 100 is bound to one end of the flexible printed circuit board 20 and the second side surface 100b close to the supporting portion 40 is provided with a gel layer 50 for fixing the flexible printed circuit board 20 to avoid the flexible printed circuit board 20 and the thin film transistor array substrate 100
  • the bound end is separated from the thin film transistor array substrate 100, and the problem of stress concentration at the end of the flexible printed circuit board 20 bound to the thin film transistor array substrate 100 which may cause the flexible printed circuit board 20 to be broken is avoided.
  • the colloidal layer 50 is an ultraviolet curing adhesive.
  • the colloidal layer 50 is formed on the second side surface 100 b of the thin film transistor array substrate 100 after coating.
  • the first preset distance d1 is greater than or equal to 0.5 mm.
  • the backlight module 30 includes a plastic frame 301 having a first supporting surface 301 a, a second supporting surface 301 b protruding from the first supporting surface 301 a, a first avoiding groove 3011 and a second avoiding groove 3012.
  • a step area is formed between the first support surface 301a and the second support surface 301b to accommodate the flexible printed circuit board 20.
  • the step area is the first relief groove 3011, that is, the first relief groove 3011 is formed by the first support surface 301a and Formed between the second supporting surfaces 301b.
  • the side wall at one end of the plastic frame 301 is recessed to form a second avoiding groove 3012, and the second avoiding groove 3012 is also used for receiving the flexible printed circuit board 20.
  • the second avoiding groove 3012 and the first avoiding groove 3011 are located at the same end of the plastic frame 301 and communicate with each other.
  • One end of the flexible printed circuit board 20 is bound to the liquid crystal display panel 10, and the other end of the flexible printed circuit board 20 passes through the first avoidance groove 3011, is bent for the first time to pass through the second avoidance groove 3012, and It is bent a second time to be placed on the back of the backlight module 30.
  • the side wall of the plastic frame 301 may not be provided with the second avoidance groove 3012, and the other end of the flexible printed circuit board 20 passes through the first avoidance groove 3011, and passes through the side wall after the first bending. After the second bending, it is placed on the back of the backlight module 30, that is, the other end of the flexible printed circuit board 20 passes through the first relief slot 3011 and is bent to be placed on the back of the backlight module 30. The flexible printed circuit board 20 is received in the second avoiding slot 3012 to avoid damage to the flexible printed circuit board 20.
  • the plastic frame 301 includes a hollow rectangular bottom frame, the rectangular bottom frame has a first supporting surface 301a, and the liquid crystal display panel 10 is fixed on the first supporting surface 301a.
  • the surface of the thin film transistor array substrate 100 opposite to the first surface 100a is fixed on the first supporting surface 301a of the rectangular bottom frame by double-sided tape or foam tape.
  • An annular protrusion is formed around the outer edge contour of the first supporting surface 301a, and the plane of the annular protrusion away from the first supporting surface 301a is the second supporting surface 301b.
  • the second supporting surface 301b is used to support a cover plate, a touch panel or a front frame disposed on the side of the liquid crystal display panel 10 away from the backlight module 30.
  • the plastic frame 301 also includes a side wall surrounding the rectangular bottom frame.
  • the side wall of one end of the plastic frame 301 provided with the first avoiding groove 3011 is recessed inward to form a second avoiding groove 3012.
  • the second avoiding groove 3012 and the first avoiding groove 3012 The slot 3011 is connected, and the widths of the first avoiding slot 3011 and the second avoiding slot 3012 are equal and larger than the width of the flexible printed circuit board 20, so that the flexible printed circuit board 20 can pass through the first avoiding slot 3011 and the second Avoid slot 3012.
  • the backlight module 30 further includes a back plate 302, a light guide plate 303, a point light source 304 and an optical film 305.
  • the plastic frame 301 is fixed on the back plate 302.
  • the light guide plate 303 is disposed in the back plate 302.
  • the point light source 304 is disposed on the inner wall of the side wall of the back plate 302 and faces the side surface of the light guide plate 303.
  • the optical film 305 is arranged on the side of the light-emitting surface of the light guide plate 303.
  • the point light source 304 is a light emitting diode, and the light emitted by the point light source 304 is processed by the light guide plate 303 to form a surface light source. After the surface light source is processed by the optical adhesive film 305, the brightness of the light incident on the liquid crystal display panel 10 is uniform.
  • the supporting portion 40 is a protrusion.
  • the supporting portion 40 has a second flat surface 40a and a first side surface 40b.
  • the second plane 40a of the support portion 40 is the plane of the support portion 40 away from the first support surface 301a, that is, the second plane 40a of the support portion 40 is the top surface of the support portion 40, and the second plane 40a of the support portion 40 is located on the second support.
  • the surface 301b is close to the side of the first supporting surface 301a.
  • the first side surface 40 b of the supporting portion 40 is a side surface of the supporting portion 40 close to the second relief groove 3012.
  • the first side surface 40b of the supporting part 40 close to the second avoiding groove 3012 is flush with the first surface 3012a of the second avoiding groove 3012 close to the supporting part 40, so that after the flexible printed circuit 20 is supported by the supporting part 40 and bent,
  • the flexible printed circuit board 20 that can be directly received in the second avoidance groove 3012 prevents the flexible printed circuit board 20 that transitions from the support portion 40 to the second avoidance groove 3012 from needing to be bent again to enter the second avoidance groove 3012, avoiding the flexible printed circuit board 20 Excessive stress.
  • the shape of the supporting portion 40 may be a rectangular parallelepiped.
  • the first side surface 40b and the second plane 40a are perpendicular to each other.
  • the surface of the support portion 40 in contact with the flexible printed circuit board 20 is an arc-shaped surface 40c, that is, the right-angle corner between the first side surface 40b and the second flat surface 40a is chamfered to form an arc-shaped surface 40c.
  • a smooth arc-shaped surface 40c is formed to avoid burrs at the corners between the first side surface 40b and the second flat surface 40a from causing damage to the flexible printed circuit board 20.
  • the radius of the curved surface 40a is 0.3 ⁇ 0.05 mm.
  • the supporting part 40 can be integrally formed with the rubber frame 301 to simplify the manufacturing process.
  • the supporting portion 40 may also be separated from the plastic frame 301.
  • the supporting portion 40 is a hard rubber block, so that the supporting portion 40 can support the flexible printed circuit board 20 while preventing damage to the flexible printed circuit board 20. effect.
  • the hard rubber block can be fixed in the first avoidance groove 3011 of the first supporting surface 301a by double-sided tape.
  • the length of the support portion 40 along the first direction is equal to the length of the first relief groove 3011 along the first direction, so the support portion 40 is connected to the above-mentioned annular protrusion.
  • the length of the supporting portion 40 in the first direction is greater than the length of the flexible printed circuit board 20 in the first direction to ensure that the supporting portion 40 can support the entire flexible printed circuit board 20 in the first direction.
  • the first direction is perpendicular to the direction in which the supporting portion 40 points to the liquid crystal display panel 10 and parallel to the first supporting surface 301a.
  • the first plane 100a of the thin film transistor array substrate 100 is located on the side of the second plane 40a of the supporting portion 40 away from the first supporting surface 301a, and the vertical distance between the first plane 100a and the second plane 40a is a second predetermined distance d2
  • a part is formed between the flexible printed circuit board 20 and the supporting part 40
  • the supporting portion 40 supports the flexible printed circuit board 20 again.
  • the first plane 100a of the thin film transistor array substrate 100 is a plane where the flexible printed circuit board 20 is bound.
  • the second preset distance d2 is 0.2 ⁇ 0.05 mm.
  • a support portion is provided in the first avoidance groove of the plastic frame for accommodating the flexible printed circuit board, so that when the flexible printed circuit board is assembled on the backlight module and is subjected to tension, the support portion is opposite to the flexible printed circuit
  • the board plays a supporting role, preventing the flexible printed circuit board from being excessively pulled and applying force to the liquid crystal display panel through the end of the flexible printed circuit board bound with the liquid crystal display panel, which causes the partial cell thickness of the liquid crystal display panel to change. Partial unevenness of light and dark appears during display, thereby improving the user's visual experience.
  • the present application also provides a plastic frame, which has a first supporting surface, a second supporting surface protruding from the first supporting surface, and a first relief groove formed between the first supporting surface and the second supporting surface,
  • the first supporting surface is provided with a supporting part located in the first avoiding groove.
  • the plastic frame of the present application is used for accommodating the flexible printed circuit board in the first avoiding slot provided with a supporting part, so that after the flexible printed circuit board to be assembled passes through the first avoiding slot, the supporting part supports the flexible printed circuit board This function prevents the flexible printed circuit board from being excessively pulled during the assembly process and applying force to the liquid crystal display panel through the end of the flexible printed circuit board bound with the liquid crystal display panel, which causes the partial cell thickness of the liquid crystal display panel to change.
  • the application also provides a backlight module, which includes the aforementioned plastic frame.
  • the backlight module of the present application is provided with a support part in the first relief slot of the plastic frame for accommodating the flexible printed circuit board, so that the flexible printed circuit board to be mounted on the liquid crystal display panel on the backlight module is assembled in the backlight mold
  • the supporting part supports the flexible printed circuit board to prevent the flexible printed circuit board from being excessively pulled and applies force to the liquid crystal display panel through the end of the flexible printed circuit board bound with the liquid crystal display panel, resulting in the liquid crystal display panel
  • the local box thickness changes.

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  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Liquid Crystal (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)

Abstract

提供一种显示装置，通过在胶框（301）用于收容印刷电路板（20）的第一避位槽（3011）中设置支撑部（40），以使得柔性印刷电路板（20）在组装于背光模组（30）上而受到拉力时，支撑部（40）对柔性印刷电路板（20）起到支撑作用，防止柔性印刷电路板（20）受到过度拉扯而将力施加至液晶显示面板（10），导致液晶显示面板（10）的盒厚发生变化。还提供一种胶框（301）和背光模组（30）。

Description

胶框、背光模组及显示装置 技术领域
本申请涉及显示技术领域，尤其涉及一种胶框、背光模组以及显示装置。
 背景技术
目前，车载用显示装置通常将柔性印刷电路板通过热压绑定于液晶显示面板的薄膜晶体管阵列基板上，再通过使用固定胶带将绑定有柔性印刷电路板的液晶显示面板组装于背光模组的胶框上，将柔性印刷电路板置于胶框的避位槽中并弯折至背光模组的背面时，由于柔性印刷电路板固定于薄膜晶体管阵列基板的一端在组装过程中会受力，并将力施加至薄膜晶体管阵列基板而导致液晶显示面板绑定柔性印刷电路板的位置的盒厚发生变化，从而导致光透过液晶显示面板时出现明暗不均的问题，即Mura现象。
因此，有必要提出一种技术方案以解决由于柔性印刷电路板在组装于背光模组的胶框上时会导致液晶显示面板出现显示明暗不均的问题。
 技术问题
本申请的目的在于提供一种胶框、背光模组以及显示装置，以解决柔性印刷电路板在组装于背光模组的胶框上时会导致液晶显示面板出现显示明暗不均的问题。
 技术解决方案
一种显示装置，所述显示装置包括液晶显示面板、柔性印刷电路板以及背光模组，所述背光模组包括胶框，所述胶框具有第一支撑面、从所述第一支撑面凸出的第二支撑面以及由所述第一支撑面和所述第二支撑面之间形成的第一避位槽，所述液晶显示面板固定于所述第一支撑面，所述第一支撑面上设置有位于所述第一避位槽中的支撑部，所述柔性印刷电路板的一端绑定于所述液晶显示面板上，所述柔性印刷电路板的另一端穿过所述第一避位槽并经弯折以置于所述背光模组的背面，所述支撑部用于支撑所述第一避位槽中的所述柔性印刷电路板。
在上述显示装置中，所述胶框一端的侧壁内陷以形成第二避位槽，所述第二避位槽与所述第一避位槽位于所述胶框的同一端且相互连通，所述柔性印刷电路板的另一端穿过所述第一避位槽，经第一次弯折以穿过所述第二避位槽，并经第二次弯折以置于所述背光模组的背面。
在上述显示装置中，所述支撑部靠近所述第二避位槽的第一侧面与所述第二避位槽靠近所述支撑部的第一表面平齐。
在上述显示装置中，所述液晶显示面板包括薄膜晶体管阵列基板，所述薄膜晶体管阵列基板靠近所述支撑部的一端绑定所述柔性印刷电路板，所述薄膜晶体管阵列基板绑定所述柔性印刷电路板的一端且靠近所述支撑部的第二侧面设置有固定所述柔性印刷电路板的胶体层，所述胶体层与所述支撑部之间具有第一预设距离。
在上述显示装置中，所述薄膜晶体管阵列基板的第一平面位于所述支撑部的第二平面远离所述第一支撑面的一侧，所述第一平面与所述第二平面之间的垂直距离为第二预设距离，所述薄膜晶体管阵列基板的所述第一平面为绑定所述柔性印刷电路板的平面，所述支撑部的所述第二平面为所述支撑部远离所述第一支撑面的平面。
在上述显示装置中，所述支撑部沿第一方向的长度大于所述柔性印刷电路板沿所述第一方向的长度，所述第一方向与所述支撑部指向所述液晶显示面板的方向垂直且平行于所述第一支撑面。
在上述显示装置中，所述支撑部沿所述第一方向的长度等于所述第一避位槽沿所述第一方向的长度。
在上述显示装置中，所述支撑部为凸起。
在上述显示装置中，所述支撑部与所述柔性印刷电路板接触的表面为弧形面。
在上述显示装置中，所述支撑部为硬质橡胶块。
在上述显示装置中，所述支撑部与所述胶框一体成型。
一种胶框，所述胶框具有第一支撑面、从所述第一支撑面凸出的第二支撑面以及由所述第一支撑面和所述第二支撑面之间形成的第一避位槽，所述第一支撑面上设置有位于所述第一避位槽中的支撑部。
在上述胶框中，所述胶框一端的侧壁内陷以形成第二避位槽，所述第二避位槽与所述第一避位槽位于所述胶框的同一端且相互连通。
在上述胶框中，所述支撑部靠近所述第二避位槽的第一侧面与所述第二避位槽靠近所述支撑部的第一表面平齐。
在上述胶框中，所述支撑部为凸起。
在上述胶框中，所述支撑部为硬质橡胶块。
在上述胶框中，所述支撑部与所述胶框一体成型。
一种背光模组，所述背光模组包括胶框，所述胶框具有第一支撑面、从所述第一支撑面凸出的第二支撑面以及由所述第一支撑面和所述第二支撑面之间形成的第一避位槽，所述第一支撑面上设置有位于所述第一避位槽中的支撑部。
在上述背光模组，所述胶框一端的侧壁内陷以形成第二避位槽，所述第二避位槽与所述第一避位槽位于所述胶框的同一端且相互连通。
在上述背光模组，所述支撑部靠近所述第二避位槽的第一侧面与所述第二避位槽靠近所述支撑部的第一表面平齐。
 有益效果
本申请提供一种胶框、背光模组以及显示装置，通过在胶框用于收容柔性印刷电路板的第一避位槽中设置支撑部，以使得柔性印刷电路板在组装于背光模组上而受到拉力时，支撑部对柔性印刷电路板起到支撑作用，防止柔性印刷电路板受到过度拉扯并通过柔性印刷电路板与液晶显示面板绑定的一端将力施加至液晶显示面板，导致液晶显示面板局部的盒厚发生变化，在显示装置显示时出现局部明暗不均的现象，从而提高用户视觉感受。
 附图说明
图1为本申请实施例显示装置的立体图；
图2为图1所示显示装置的局部放大部；
图3为图1所示显示装置的截面示意图。
附图标示如下：
10液晶显示面板；20柔性印刷电路板；30背光模组； 40支撑部；
100薄膜晶体管阵列基板；101彩膜基板；100a第一平面；100b第二侧面；50 胶体层；d1第一预设距离；301胶框；301a第一支撑面； 301b第二支撑面；3011第一避位槽；3012第二避位槽；302背板；303导光板；304点光源；305光学膜片；40a第二平面； 40b第一侧面；40c 弧形面；3012a第一表面。
 本发明的实施方式
下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚、完整地描述。显然，所描述的实施例仅仅是本申请一部分实施例，而不是全部的实施例。基于本申请中的实施例，本领域技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。
请参阅图1-图3，图1为本申请实施例显示装置的立体图，图2为图1所示显示装置的局部放大部，图3为图1所示显示装置的截面示意图。显示装置为车载用液晶显示装置。显示装置包括液晶显示面板10、柔性印刷电路板20、背光模组30以及支撑部40。
液晶显示面板10包括薄膜晶体管阵列基板100以及彩膜基板101。彩膜基板101与薄膜晶体管阵列基板100相对设置。薄膜晶体管阵列基板100相对彩膜基板101向一侧延伸以形成一延伸区。薄膜晶体管阵列基板100和彩膜基板101的形状均为长方体。
薄膜晶体管阵列基板100具有与彩膜基板101相对的第一平面100a以及靠近支撑部40的第二侧面100b。第一平面100a和第二侧面100b相互垂直。第二侧面100b位于薄膜晶体管阵列基板100靠近支撑部40的一端。薄膜晶体管阵列基板100靠近支撑部40的一端绑定柔性印刷电路板20。具体地，柔性印刷电路板20的一端通过热压固定于薄膜晶体管阵列基板100延伸区的第一平面100a上。
薄膜晶体管阵列基板100绑定柔性印刷电路板20的一端且靠近支撑部40的第二侧面100b设置有固定柔性印刷电路板20的胶体层50，以避免柔性印刷电路板20与薄膜晶体管阵列基板100绑定的一端与薄膜晶体管阵列基板100分离，且避免柔性印刷电路板20绑定于薄膜晶体管阵列基板100的一端存在应力集中而导致柔性印刷电路板20断裂的问题。胶体层50与支撑部40之间具有第一预设距离d1，以避免胶体层50与支撑部40接触而引起组装干涉。胶体层50为紫外固化胶。胶体层50经涂布形成于薄膜晶体管阵列基板100的第二侧面100b。第一预设距离d1大于或等于0.5毫米。
背光模组30包括胶框301，胶框301具有第一支撑面301a、从第一支撑面301a凸出的第二支撑面301b、第一避位槽3011以及第二避位槽3012。第一支撑面301a和第二支撑面301b之间形成一台阶区以容纳柔性印刷电路板20，该台阶区为第一避位槽3011，即第一避位槽3011由第一支撑面301a和第二支撑面301b之间形成。胶框301一端的侧壁内陷以形成第二避位槽3012，第二避位槽3012也用于收容柔性印刷电路板20。第二避位槽3012与第一避位槽3011位于胶框301的同一端且相互连通。柔性印刷电路板20的一端绑定于液晶显示面板10上，柔性印刷电路板20的另一端穿过第一避位槽3011，经第一次弯折以穿过第二避位槽3012，并经第二次弯折以置于背光模组30的背面。
可以理解的是，胶框301的侧壁也可以不设置第二避位槽3012，柔性印刷电路板20的另一端穿过第一避位槽3011，经第一次弯折之后，经过侧壁，再经第二次弯折之后以置于背光模组30的背面，即柔性印刷电路板20的另一端穿过第一避位槽3011并经弯折以置于背光模组30的背面。通过使柔性印刷电路板20收容于第二避位槽3012以避免柔性印刷电路板20受损。
具体地，胶框301包括一中空的矩形底框，矩形底框具有第一支撑面301a，液晶显示面板10固定于第一支撑面301a。薄膜晶体管阵列基板100上与第一平面100a相对的平面通过双面胶或泡棉胶固定于矩形底框的第一支撑面301a上。环绕第一支撑面301a的外边缘轮廓形成环形凸起，环形凸起远离第一支撑面301a的平面为第二支撑面301b。第二支撑面301b用于支撑设置于液晶显示面板10远离背光模组30一侧的盖板、触控面板或前框。环形凸起上形成一缺口以使第一支撑面301a显露，形成该缺口处的第一支撑面301a和第二支撑面301b之间形成台阶区。胶框301还包括环绕矩形底框的侧壁，胶框301设置有第一避位槽3011的一端的侧壁向内凹陷形成第二避位槽3012，第二避位槽3012与第一避位槽3011连通，第一避位槽3011和第二避位槽3012的宽度相等且大于柔性印刷电路板20的宽度，以使得柔性印刷电路板20能穿过第一避位槽3011和第二避位槽3012。
背光模组30还包括背板302、导光板303、点光源304以及光学膜片305。胶框301固定于背板302上。导光板303设置于背板302中。点光源304设置于背板302侧壁的内壁上且面向导光板303的侧面。光学膜片305设置于导光板303出光面所在侧。点光源304为发光二极管，点光源304发出的光经过导光板303处理形成面光源，面光源经过光学胶膜305处理后使得入射至液晶显示面板10的光的亮度具有均一性。
支撑部40为一凸起。支撑部40具有第二平面40a和第一侧面40b。支撑部40的第二平面40a为支撑部40远离第一支撑面301a的平面，即支撑部40的第二平面40a为支撑部40的顶面，支撑部40的第二平面40a位于第二支撑面301b靠近第一支撑面301a的一侧。支撑部40的第一侧面40b为支撑部40靠近第二避位槽3012的侧面。支撑部40靠近第二避位槽3012的第一侧面40b与第二避位槽3012靠近支撑部40的第一表面3012a平齐，以使得柔性印刷电路20经过支撑部40支撑并弯折后，能直接收容于第二避位槽3012中，避免从支撑部40过渡至第二避位槽3012的柔性印刷电路板20需再弯折以进入第二避位槽3012中，避免柔性印刷电路板20受过多应力。
支撑部40的形状可以为长方体，此时，第一侧面40b和第二平面40a相互垂直。进一步地，支撑部40与柔性印刷电路板20接触的表面为弧形面40c，即对第一侧面40b和第二平面40a之间的直角转角进行倒R角处理以形成弧形面40c，以形成平滑的弧形面40c，避免第一侧面40b和第二平面40a之间的转角处有毛刺而导致柔性印刷电路板20受损。弧线面40a的半径为0.3±0.05毫米。
支撑部40可以与胶框301一体成型，以简化制造工艺。支撑部40也可以与胶框301分离，例如，支撑部40为硬质橡胶块，使得支撑部40能起到支撑柔性印刷电路板20作用的同时，能起到避免柔性电路板20受损的作用。硬质橡胶块可以通过双面胶固定于第一支撑面301a的第一避位槽3011中。
支撑部40沿第一方向的长度等于第一避位槽3011沿第一方向的长度，故支撑部40与上述环形凸起连接。支撑部40沿第一方向的长度大于柔性印刷电路板20沿第一方向的长度，以保证支撑部40在第一方向上能支撑整个柔性印刷电路板20。第一方向与支撑部40指向液晶显示面板10的方向垂直且平行于第一支撑面301a。
柔性印刷电路板20的一端绑定于液晶显示面板10上，柔性印刷电路板20的另一端穿过第一避位槽3011并经弯折以置于背光模组30的背面。薄膜晶体管阵列基板100的第一平面100a位于支撑部40的第二平面40a远离第一支撑面301a的一侧，第一平面100a与第二平面40a之间的垂直距离为第二预设距离d2，以避免因为组装公差以及厚度公差导致支撑部40顶住柔性印刷电路板20，而造成组装干涉，即在第一避位槽3011中，使得柔性印刷电路板20与支撑部40之间形成部分的悬空后，支撑部40再支撑柔性印刷电路板20。薄膜晶体管阵列基板100的第一平面100a为绑定柔性印刷电路板20的平面。第二预设距离d2为0.2±0.05毫米。
本申请显示装置通过在胶框用于收容柔性印刷电路板的第一避位槽中设置支撑部，以使得柔性印刷电路板在组装于背光模组上而受到拉力时，支撑部对柔性印刷电路板起到支撑作用，防止柔性印刷电路板受到过度拉扯并通过柔性印刷电路板与液晶显示面板绑定的一端将力施加至液晶显示面板，导致液晶显示面板局部的盒厚发生变化，在显示装置显示时出现局部明暗不均的现象，从而提高用户视觉感受。
本申请还提供一种胶框，胶框具有第一支撑面、从第一支撑面凸出的第二支撑面以及由第一支撑面和第二支撑面之间形成的第一避位槽，第一支撑面上设置有位于第一避位槽中的支撑部。
本申请胶框用于收容柔性印刷电路板的第一避位槽中设置支撑部，以使得待组装的柔性印刷电路板穿过第一避位槽后，支撑部对柔性印刷电路板起到支撑作用，防止组装过程中柔性印刷电路板受到过度拉扯并通过柔性印刷电路板与液晶显示面板绑定的一端将力施加至液晶显示面板，导致液晶显示面板局部的盒厚发生变化。
本申请还提供一种背光模组，背光模组包括上述胶框。
本申请背光模组通过在胶框用于收容柔性印刷电路板的第一避位槽中设置支撑部，以使得待安装于背光模组上的液晶显示面板上的柔性印刷电路板组装于背光模组上时，支撑部对柔性印刷电路板起到支撑作用，防止柔性印刷电路板受到过度拉扯并通过柔性印刷电路板与液晶显示面板绑定的一端将力施加至液晶显示面板，导致液晶显示面板局部的盒厚发生变化。
以上实施例的说明只是用于帮助理解本申请的技术方案及其核心思想；本领域的普通技术人员应当理解：其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分技术特征进行等同替换；而这些修改或者替换，并不使相应技术方案的本质脱离本申请各实施例的技术方案的范围。

Claims (20)

  1. 一种显示装置，其中，所述显示装置包括液晶显示面板、柔性印刷电路板以及背光模组，所述背光模组包括胶框，所述胶框具有第一支撑面、从所述第一支撑面凸出的第二支撑面以及由所述第一支撑面和所述第二支撑面之间形成的第一避位槽，所述液晶显示面板固定于所述第一支撑面，所述第一支撑面上设置有位于所述第一避位槽中的支撑部，所述柔性印刷电路板的一端绑定于所述液晶显示面板上，所述柔性印刷电路板的另一端穿过所述第一避位槽并经弯折以置于所述背光模组的背面，所述支撑部用于支撑所述第一避位槽中的所述柔性印刷电路板。
  2. 根据权利要求1所述的显示装置，其中，所述胶框一端的侧壁内陷以形成第二避位槽，所述第二避位槽与所述第一避位槽位于所述胶框的同一端且相互连通，所述柔性印刷电路板的另一端穿过所述第一避位槽，经第一次弯折以穿过所述第二避位槽，并经第二次弯折以置于所述背光模组的背面。
  3. 根据权利要求2所述的显示装置，其中，所述支撑部靠近所述第二避位槽的第一侧面与所述第二避位槽靠近所述支撑部的第一表面平齐。
  4. 根据权利要求1所述的显示装置，其中，所述液晶显示面板包括薄膜晶体管阵列基板，所述薄膜晶体管阵列基板靠近所述支撑部的一端绑定所述柔性印刷电路板，所述薄膜晶体管阵列基板绑定所述柔性印刷电路板的一端且靠近所述支撑部的第二侧面设置有固定所述柔性印刷电路板的胶体层，所述胶体层与所述支撑部之间具有第一预设距离。
  5. 根据权利要求4所述的显示装置，其中，所述薄膜晶体管阵列基板的第一平面位于所述支撑部的第二平面远离所述第一支撑面的一侧，所述第一平面与所述第二平面之间的垂直距离为第二预设距离，所述薄膜晶体管阵列基板的所述第一平面为绑定所述柔性印刷电路板的平面，所述支撑部的所述第二平面为所述支撑部远离所述第一支撑面的平面。
  6. 根据权利要求1所述的显示装置，其中，所述支撑部沿第一方向的长度大于所述柔性印刷电路板沿所述第一方向的长度，所述第一方向与所述支撑部指向所述液晶显示面板的方向垂直且平行于所述第一支撑面。
  7. 根据权利要求6所述的显示装置，其中，所述支撑部沿所述第一方向的长度等于所述第一避位槽沿所述第一方向的长度。
  8. 根据权利要求1所述的显示装置，其中，所述支撑部为凸起。
  9. 根据权利要求8所述的显示装置，其中，所述支撑部与所述柔性印刷电路板接触的表面为弧形面。
  10. 根据权利要求1所述的显示装置，其中，所述支撑部为硬质橡胶块。
  11. 根据权利要求1所述的显示装置，其中，所述支撑部与所述胶框一体成型。
  12. 一种胶框，其中，所述胶框具有第一支撑面、从所述第一支撑面凸出的第二支撑面以及由所述第一支撑面和所述第二支撑面之间形成的第一避位槽，所述第一支撑面上设置有位于所述第一避位槽中的支撑部。
  13. 根据权利要求12所述的胶框，其中，所述胶框一端的侧壁内陷以形成第二避位槽，所述第二避位槽与所述第一避位槽位于所述胶框的同一端且相互连通。
  14. 根据权利要求13所述的胶框，其中，所述支撑部靠近所述第二避位槽的第一侧面与所述第二避位槽靠近所述支撑部的第一表面平齐。
  15. 根据权利要求12所述的胶框，其中，所述支撑部为凸起。
  16. 根据权利要求12所述的胶框，其中，所述支撑部为硬质橡胶块。
  17. 根据权利要求12所述的胶框，其中，所述支撑部与所述胶框一体成型。
  18. 一种背光模组，其中，所述背光模组包括胶框，所述胶框具有第一支撑面、从所述第一支撑面凸出的第二支撑面以及由所述第一支撑面和所述第二支撑面之间形成的第一避位槽，所述第一支撑面上设置有位于所述第一避位槽中的支撑部。
  19. 根据权利要求18所述的背光模组，其中，所述胶框一端的侧壁内陷以形成第二避位槽，所述第二避位槽与所述第一避位槽位于所述胶框的同一端且相互连通。
  20. 根据权利要求19所述的背光模组，其中，所述支撑部靠近所述第二避位槽的第一侧面与所述第二避位槽靠近所述支撑部的第一表面平齐。
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