CN108614372B - Liquid crystal display device having a plurality of pixel electrodes - Google Patents

Liquid crystal display device having a plurality of pixel electrodes Download PDF

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Publication number
CN108614372B
CN108614372B CN201810591670.3A CN201810591670A CN108614372B CN 108614372 B CN108614372 B CN 108614372B CN 201810591670 A CN201810591670 A CN 201810591670A CN 108614372 B CN108614372 B CN 108614372B
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China
Prior art keywords
liquid crystal
area
crystal display
display device
light
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CN201810591670.3A
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Chinese (zh)
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CN108614372A (en
Inventor
秦锋
时成瑛
夏志强
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Shanghai AVIC Optoelectronics Co Ltd
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Shanghai AVIC Optoelectronics Co Ltd
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Priority to CN202110684651.7A priority Critical patent/CN113419370B/en
Priority to CN201810591670.3A priority patent/CN108614372B/en
Publication of CN108614372A publication Critical patent/CN108614372A/en
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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
    • G02F1/133305—Flexible substrates, e.g. plastics, organic film
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
    • G02B6/0023—Means for improving the coupling-in of light from the light source into the light guide provided by one optical element, or plurality thereof, placed between the light guide and the light source, or around the light source
    • G02B6/0031—Reflecting element, sheet or layer
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
    • G02B6/0055—Reflecting element, sheet or layer
    • 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
    • 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
    • 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
    • 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
    • G02F1/133605—Direct backlight including specially adapted reflectors
    • 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
    • G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
    • G02F1/133607—Direct backlight including a specially adapted diffusing, scattering or light controlling members the light controlling member including light directing or refracting elements, e.g. prisms or lenses
    • 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
    • G02F1/1343—Electrodes
    • G02F1/134309—Electrodes characterised by their geometrical arrangement
    • G02F1/134363—Electrodes characterised by their geometrical arrangement for applying an electric field parallel to the substrate, i.e. in-plane switching [IPS]
    • 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
    • G02F1/13452—Conductors connecting driver circuitry and terminals of panels

Abstract

The liquid crystal display device provided by the invention comprises a liquid crystal display panel and a backlight module, wherein a flexible substrate of the liquid crystal display panel comprises a plane area and a step area positioned on at least one side of the plane area, a light guide plate in the backlight module comprises a light emitting area and a bending area positioned on at least one side of the light emitting area, the light emitting area is arranged right opposite to the plane area of the flexible substrate to realize the display function, the bending area and the step area are bent and attached to the surface of one side of the backlight module, which is far away from a liquid crystal layer, so that the problems of large frame width and small screen occupation ratio of the liquid crystal display device caused by arranging a frame area for accommodating the step area and a light source on the liquid crystal display device are avoided, the step area and the light source are partially overlapped with the display area of the liquid crystal display panel in the direction vertical to the backlight module, and the frame width of the liquid, the screen occupation ratio is increased.

Description

Liquid crystal display device having a plurality of pixel electrodes
Technical Field
The invention relates to the technical field of display, in particular to a liquid crystal display device.
Background
The liquid crystal display device has the advantages of energy conservation, lightness, thinness, exquisite picture and the like, and is widely applied in the technical field of display. With the continuous improvement of the living quality of people, the requirements of people on the liquid crystal display device are higher and higher, and the liquid crystal display device with a narrow frame and a full screen becomes a focus of people in pursuit.
The conventional liquid crystal display device includes a liquid crystal display panel and a backlight module, wherein the liquid crystal display panel needs to be provided with a driving array and a control chip to provide driving voltage for liquid crystal molecules in a display area. The driving array is arranged in the display area, and the control chip and the fan-out wiring electrically connected with the control chip are arranged in a frame area of the liquid crystal display device; meanwhile, the light source in the backlight module is also located in the frame area of the liquid crystal display device, and a certain spacing distance is required between the light source and the light incident surface of the light guide plate, so that the light mixing effect is increased.
Disclosure of Invention
The invention provides a liquid crystal display device capable of realizing an ultra-narrow frame, so as to increase the screen occupation ratio of the liquid crystal display device.
An embodiment of the present invention provides a liquid crystal display device, including: the backlight module comprises a liquid crystal display panel and a backlight module positioned on one side of the liquid crystal display panel;
the liquid crystal display panel includes:
a flexible substrate comprising a planar region and a stepped region, the stepped region being located on at least one side edge of the planar region;
the liquid crystal layer is positioned on one side, far away from the backlight module, of the flexible substrate, and the liquid crystal layer is positioned in the plane area;
the integrated driving circuit is positioned in the step area;
a display driver array located in the planar area;
the step area is bent towards the surface of one side, away from the liquid crystal layer, of the flexible substrate, and the bent step area is attached to the surface of one side, away from the liquid crystal layer, of the backlight module;
the backlight module includes:
the light guide plate comprises a light emergent area and a bending area positioned on at least one side of the light emergent area, the light emergent area is arranged right opposite to the plane area of the flexible substrate, a light emergent surface is arranged on one side of the light emergent area, which faces the liquid crystal display panel, and a light incident surface is arranged on one side of the bending area, which is far away from the light emergent area;
the reflecting sheet is positioned on one side, away from the liquid crystal display panel, of the light guide plate, the bending area bends towards the surface of one side, away from the liquid crystal display panel, of the reflecting sheet, and the light incident surface is positioned on one side, away from the liquid crystal display panel, of the reflecting sheet after bending;
and the light source is positioned on one side of the reflector plate, which deviates from the liquid crystal display panel, and is arranged corresponding to the light incident surface of the light guide plate.
The invention provides a liquid crystal display device, which comprises a liquid crystal display panel and a backlight module, wherein a flexible substrate of the liquid crystal display panel comprises a plane area and a bending area, the bending area is positioned on at least one side edge of the plane area, the bending area bends towards the surface of one side of the flexible substrate, which is far away from a liquid crystal layer, and the bending area is attached to the surface of one side of the backlight module, which is far away from the liquid crystal layer after bending; the light guide plate in the backlight module comprises a light outlet area and a bending area located on at least one side of the light outlet area, the light outlet area is arranged right opposite to a plane area of the flexible substrate, the bending area is bent towards the surface of one side, away from the liquid crystal display panel, of the backlight module, the light inlet surface is located on one side, away from the liquid crystal display panel, of the backlight module after bending, and therefore the light source is located on one side, away from the liquid crystal display panel, of the backlight module. The problem that the liquid crystal display device is large in frame width and small in screen occupation ratio due to the fact that a frame area used for containing the step area and the light source is arranged on the liquid crystal display device is solved, partial overlapping of the step area, the light source and the display area of the liquid crystal display panel in the direction perpendicular to the backlight module is achieved, the frame width of the liquid crystal display device is reduced, and the screen occupation ratio is increased.
Drawings
Fig. 1 is a schematic structural diagram of a liquid crystal display device according to an embodiment of the invention;
FIG. 2 is a diagram illustrating a position comparison between a backlight module and a liquid crystal display panel of the liquid crystal display device shown in FIG. 1;
FIG. 3 is a schematic sectional view taken along line A1-A2 in FIG. 1;
FIG. 4 is a schematic structural diagram of another LCD device according to an embodiment of the present invention;
FIG. 5 is a diagram illustrating a position comparison between a backlight module and a liquid crystal display panel of the liquid crystal display device shown in FIG. 4;
FIG. 6 is a schematic sectional view taken along line B1-B2 in FIG. 4;
FIG. 7 is a schematic structural diagram of another LCD device according to an embodiment of the present invention;
FIG. 8 is a schematic structural diagram of another LCD device according to an embodiment of the present invention;
FIG. 9 is a schematic view of a backlight module of another liquid crystal display device according to an embodiment of the present invention;
fig. 10 is a schematic view of a backlight module in another liquid crystal display device according to an embodiment of the invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
Fig. 1 is a schematic structural diagram of a liquid crystal display device according to an embodiment of the present invention, fig. 2 is a comparison diagram of positions of a backlight module and a liquid crystal display panel in the liquid crystal display device shown in fig. 1, and fig. 3 is a schematic structural diagram of a cross section taken along a line a1-a2 in fig. 1. Referring to fig. 1, 2 and 3, the liquid crystal display device 100 includes: a liquid crystal display panel 20 and a backlight module 10 positioned at one side of the liquid crystal display panel 20. The liquid crystal display panel 20 includes: the liquid crystal display panel comprises an array substrate 201, a color film substrate 202 and a liquid crystal layer 203 clamped in a box-shaped space formed by the array substrate 201 and the color film substrate 202.
The array substrate 201 comprises a flexible substrate 21, the flexible substrate 21 comprises a planar area 211 and a stepped area 212, and the stepped area 212 is located on at least one side edge of the planar area 211. The flexible substrate 21 is further provided with a circuit connection layer 212a and a display driving array 211a, the circuit connection layer 212a is located in the step area 212 of the flexible substrate 21, and the display driving array 211a is located in the flat area 211 of the flexible substrate 21.
The array substrate 201 may further include a bonding region 213, the liquid crystal display device 100 further includes a flexible printed circuit board FPC and a driving chip IC, the driving chip IC and the flexible printed circuit board FPC are bonded on the flexible substrate 21 through the bonding region 213, the display driving array 211a is electrically connected to the driving chip IC through a circuit connection layer 212a, and the driving chip IC is electrically connected to an external driving circuit through a connection line on the flexible printed circuit board FPC. The flexible printed circuit board in this embodiment does not need to use a high-precision flexible printed circuit board, and therefore, the manufacturing cost of the liquid crystal display device is reduced by the binding mode of the driving chip and the flexible printed circuit board in this embodiment.
The following steps can be also included: the array substrate 201 includes a binding region 213 disposed in the step region 212, the liquid crystal display device 100 further includes a flexible printed circuit board FPC and a driver chip IC, the flexible printed circuit board FPC is bound on the flexible substrate 21 through the binding region 213, the driver chip IC is disposed on the flexible printed circuit board FPC, the display driver array 211a is electrically connected to the driver chip IC through a circuit connection layer 212a and a connection line on the flexible printed circuit board FPC, and the driver chip IC is electrically connected to an external driver circuit through a connection line on the flexible printed circuit board FPC.
In this embodiment, the display driving array 211a may include, for example: a plurality of data lines extending along the first direction D1 and arranged along the second direction D2, a plurality of scan lines extending along the second direction D2 and arranged along the first direction D1, the plurality of data lines and the plurality of scan lines being arranged to intersect to define a plurality of sub-pixels, the plurality of sub-pixels including a plurality of rows of sub-pixels and a plurality of columns of sub-pixels, wherein the sub-pixels in the same row can be electrically connected to the same scan line, for example, the sub-pixels in the same column can be electrically connected to the same data line, each sub-pixel includes a display driving switch, a pixel electrode and a common electrode, and can receive a data signal provided by the data line under the control of a scan signal provided by the scan line, so that a driving electric field is formed between the pixel electrode and the common electrode to drive the bending or rotation of liquid crystal molecules in the liquid crystal layer, thereby controlling the color and gray scale display of the corresponding region of each sub-pixel, thereby realizing image display. Of course, the array substrate 201 may further include a touch driving structure in addition to the display driving array 211a, and the touch driving structure is located in the planar area 211 of the flexible substrate 21 to implement a touch function.
In the above technical solutions, each trace in the circuit connection layer 212a may be disposed on the same layer as a data line, a scan line, or a touch trace in the display driving array 211a, or may be formed by other film layers, and may be set as needed. Each wire in the circuit connecting layer 212a may be located on the same film layer, or may be located on different film layers, and if each wire in the circuit connecting layer 212a is disposed in a plurality of film layers, the electrical connection may be achieved through via holes.
The liquid crystal layer 203 is located on a side of the flexible substrate 21 away from the backlight module 10, and the liquid crystal layer 203 is located in the planar region 211 of the flexible substrate 21. The color filter substrate 202 is located on a side of the liquid crystal layer 203 away from the flexible substrate 21, and is disposed corresponding to the planar area 211 of the flexible substrate 21. The step region 212 is bent towards the surface of the flexible substrate 21 away from the liquid crystal layer 203, and the bent step region 212 is attached to the surface of the backlight module 10 away from the liquid crystal layer 203. The planar area 211 is mainly used as an area of a display screen of the liquid crystal display device, a side of the color film substrate 202 away from the liquid crystal layer 203 is a light emitting surface of the liquid crystal display device, and the display driving array 211a provides a voltage required for driving liquid crystal molecules to deflect to the liquid crystal layer 203.
In the embodiment of the invention, the flexible substrate 21 is arranged in the liquid crystal display device, the flexible substrate 21 comprises the plane area 211 and the step area 212, and the step area 212 is bent towards one side of the backlight module 10 far away from the liquid crystal layer 203, namely the circuit connecting layer 212a is bent to the back side of the backlight module, so that the circuit connecting layer and the display driving array are partially overlapped in the direction vertical to the backlight module, the space area of the light emitting side of the liquid crystal display device is not occupied, the circuit connecting layer is prevented from occupying the frame area of the liquid crystal display device, and the frame width is reduced. In addition, the step area is arranged on the surface of one side, away from the liquid crystal layer, of the backlight module, so that the light emitting area emitted by the backlight module is not shielded by the step area, and the part, corresponding to the light emitting area of the backlight module, of the liquid crystal display panel can be basically used as the area of a display picture of the liquid crystal display device, the screen occupation ratio of the liquid crystal display device is further improved, and the backlight utilization rate of the liquid crystal display device is improved.
Further, the backlight module 10 includes a light guide plate 11, a light source 12 located on one side of the light guide plate 11, and a reflective sheet 13 located on one side of the light guide plate 11 away from the liquid crystal display panel 20, and is configured to reflect light emitted from the light source 12 to one side of the light guide plate 11 facing the reflective sheet 13 back to the light guide plate 11. The light guide plate 11 includes a light exit region 111 and a bending region 112 located on at least one side of the light exit region, the light exit region 111 is disposed corresponding to the planar region 211 of the flexible substrate 21, a light exit surface is disposed on a side of the light exit region 111 facing the liquid crystal display panel 20, and a light entrance surface 1121 is disposed on a side of the bending region 112 away from the light exit region 111. The bending region 112 of the light guide plate 11 is bent toward a surface of a side of the reflector plate 13 away from the liquid crystal display panel 20, after bending, the light incident surface 1121 of the light guide plate 11, which is located on the side of the reflector plate 13 away from the liquid crystal display panel 20, is located on a side of the reflector plate 13 away from the liquid crystal display panel 20, the light source 12 is disposed corresponding to the light incident surface 1121 of the light guide plate 11, and is located on a side of the reflector plate 13 away from the liquid crystal display panel 20 together with the bending region 112 of the light guide plate 11, light emitted by the light source 12 is incident into the light guide plate 11 through the light incident surface 1121 of the light guide plate 11 and emitted from the light emitting surface of the light guide plate 11 to enter the liquid crystal display panel. The light guide plate 11 may be made of a flexible material such as polyimide, which is convenient for exhibiting bending performance, or may be made of an optical grade plastic such as Polycarbonate (PC) or polymethyl methacrylate (PMMA), which is subjected to a thermal bending process or formed by a mold in a single step during the manufacturing process of the light guide plate. The thickness of the bending region may be, for example, consistent with the thickness of the light exit region, or the thickness of the bending region may be smaller than the thickness of the light exit region, so as to further reduce the overall thickness of the bending region and the light exit region after being stacked.
The light source 12 may be, for example, an LED light bar, and includes a strip-shaped driving circuit board and a plurality of LEDs sequentially disposed on the driving circuit board, and the plurality of LEDs are electrically connected to the light source driving circuit through a connection circuit on the driving circuit board. The backlight module 10 may further include an optical film group for adjusting the light emitting direction and uniformity, which is located on a side of the light guide plate 11 facing the liquid crystal display panel 20, and includes a prism sheet, a diffusion sheet, and the like. The present embodiment does not limit this.
The liquid crystal display device provided by the embodiment of the invention comprises a liquid crystal display panel and a backlight module, wherein a flexible substrate 21 of the liquid crystal display panel comprises a plane area 211 and a step area 212, the step area 212 is positioned at least one side edge of the plane area 211, a circuit connecting layer 212a is positioned in the step area 212 of the flexible substrate 21, a display driving array 211a is positioned in the plane area 211 of the flexible substrate 21, the step area 212 is bent towards one side surface of the flexible substrate 21 away from a liquid crystal layer 203, and the step area 212 is attached to one side surface of the backlight module 10 away from the liquid crystal layer 203 after bending, so that the problems that the circuit connecting layer 212a and the display driving array 211a are positioned in a frame area of the liquid crystal display device are avoided, the frame width of the liquid crystal display device is large and the screen occupation ratio is small, the partial overlapping of the circuit connecting layer 212a and the display driving array 211a in the direction vertical to the backlight, the liquid crystal display device has the advantages of small frame width and large screen occupation ratio.
Meanwhile, the light guide plate 11 of the backlight module comprises a light emitting area 111 and a bending area 112 located on at least one side of the light emitting area 111, the bending area 112 bends towards a side surface of the reflector plate 13 deviating from the liquid crystal layer 203, and the bending area 112 is attached to a side surface of the reflector plate 13 far away from the liquid crystal layer 203 after bending, so that the light source 12 is located on a side surface of the reflector plate 13 far away from the liquid crystal layer 203, the light source 12 is prevented from being located in a frame area of the liquid crystal display device, and the problems that the frame width of the liquid crystal display device is large and the screen occupation. Even if the light mixing distance between the light source 12 and the light incident surface 1121 of the light guide plate 11 is increased, the frame width of the liquid crystal display device is not increased, so that the light mixing distance between the light source 12 and the light incident surface 1121 of the light guide plate 11 can be increased as required to improve the problem of firefly of the backlight module.
Further, in order to fully explain the corresponding relationship between the up-down positions of the bending region 112 of the light guide plate 11 and the step region 212 of the flexible substrate 21, fig. 2 illustrates the backlight module 10 and the liquid crystal display panel 20 together. As shown in fig. 2 and 3, in the present embodiment, the liquid crystal display device 100 includes upper and lower ends oppositely disposed in the first direction D1, wherein the bending region 112 of the light guide plate 11 is located at the upper end of the liquid crystal display device 100, and the stepped region 212 of the flexible substrate 21 is located at the lower end of the liquid crystal display device 100. Thus, the light source 12 of the backlight module 10 is disposed at the upper end of the liquid crystal display device 100, the driver IC and the flexible printed circuit board FPC of the liquid crystal display panel 20 are disposed at the lower end of the liquid crystal display device 100, the bending region 112 of the light guide plate 11 and the step region 212 of the flexible substrate 21 do not overlap, and the light source 12 of the backlight module 10 and the driver IC and the flexible printed circuit board FPC of the liquid crystal display panel 20 do not overlap, so that the overall stacking thickness of the liquid crystal display device can be reduced, which is helpful for realizing the light and thin of the liquid crystal display device.
Further, in this embodiment, a rigid substrate, such as a glass substrate and a rigid plastic substrate, may be disposed between the planar area 211 of the flexible substrate 21 and the backlight module 10, so as to enhance the hardness of the liquid crystal display device, achieve a hard-screen display, and avoid the problems of uneven display brightness, stripe display, light leakage, and the like of the liquid crystal display device caused by movement of liquid crystal molecules in the liquid crystal layer after being stressed and displacement of the color filter substrate after being stressed.
Optionally, the color filter substrate 202 may also include a substrate made of a flexible material, so as to enhance toughness of the color filter substrate 202 and enhance the anti-falling performance of the liquid crystal display device. On this basis, the color film substrate 202 may further include a rigid substrate, such as a glass substrate, a rigid plastic substrate, etc., so as to enhance the hardness of the liquid crystal display device, implement hard-screen display, and avoid the problems of uneven display brightness, stripe display, light leakage, etc., of the liquid crystal display device caused by the movement of liquid crystal molecules in the liquid crystal layer after being stressed.
Fig. 4 is a schematic structural diagram of another liquid crystal display device according to an embodiment of the invention, fig. 5 is a schematic structural diagram comparing a positional relationship between a backlight module and a liquid crystal display panel in the liquid crystal display device shown in fig. 4, and fig. 6 is a schematic structural diagram taken along a cross section B1-B2 in fig. 4. The liquid crystal display device provided in this embodiment has a structure similar to that of the liquid crystal display device shown in fig. 1 to 3, except that: in this embodiment, the light source 12 of the backlight module 10 and the step region 212 of the flexible substrate 21 are located at the same end of the liquid crystal display device 100, for example, at the lower end of the liquid crystal display device.
Specifically, in the present embodiment, the liquid crystal display device 100 includes upper and lower ends oppositely disposed in the first direction D1, wherein the bending region 112 of the light guide plate 11 is located at the lower end of the liquid crystal display device 100, and the step region 212 of the flexible substrate 21 is located at the lower end of the liquid crystal display device 100. Thus, the light source 12 of the backlight module 10 is disposed at the lower end of the liquid crystal display device 100, the driving chip IC and the flexible printed circuit board FPC of the liquid crystal display panel 20 are disposed at the lower end of the liquid crystal display device 100, and the bending region 112 of the light guide plate 11 is bent and then overlapped with the step region 212 of the flexible substrate 21 and attached to one side of the reflective sheet away from the liquid crystal layer.
The length of the step area 212 of the flexible substrate 21 in the first direction D1 is greater than the length of the bending area 112 of the light guide plate 11 in the first direction D1, and the binding area 213 is located at an end of the bending area 112 away from the planar area 211, so that the light source 12 of the backlight module 10 and the step area 212 of the flexible substrate 21 are stacked and disposed between the driver IC and/or the flexible printed circuit board FPC and the planar area 211 of the flexible substrate 21, thereby avoiding the stacking of the light source 12 and the driver IC and/or the flexible printed circuit board FPC, reducing the overall stacking thickness of the liquid crystal display device, and facilitating the realization of the lightness and thinness of the liquid crystal display device.
Fig. 7 is a schematic structural diagram of another liquid crystal display device according to an embodiment of the invention. Referring to fig. 7, based on the above technical solutions, the liquid crystal display device 100 includes a display area AA and a notch 1001 located at an upper end of the display area AA, and the notch 1001 may be used to set a camera and/or a receiver, for example, so as to increase an area of the display area AA, reduce an area of a non-display area of the liquid crystal display device, and further improve a screen occupation ratio of the liquid crystal display device. The display area AA includes a first sub-display area AA1 positioned below the notch 1001 and a second sub-display area AA2 positioned at both sides of the notch 1001 and the first sub-display area AA 1. The light source of the backlight module includes a first sub-light source 12a and a second sub-light source 12b, wherein the first sub-light source 12a is correspondingly disposed at an end of the first sub-display area AA1 close to the notch 1001, and the second sub-light source 12b is correspondingly disposed at an upper end of the second sub-display area AA2 and located at two sides of the notch 1001.
The bending region of the light guide plate is correspondingly disposed at one end of the liquid crystal display device 100 having the notch 1001, the bending region of the light guide plate includes a first portion 112a corresponding to the notch 1001 and a second portion 112b corresponding to the second sub-display regions AA2 at two sides of the notch 1001, the first sub-light source 12a is disposed corresponding to the light incident surface disposed on the first portion 112a, and the second sub-light source 12b is disposed corresponding to the light incident surface disposed on the second portion 112 b. In this embodiment, the notch 1001 is located on the upper edge 21a of the display area AA, the upper edge 21a includes linear portions located at both sides of the notch 1001 and a boundary portion between the notch 1001 and the first sub-display area AA1, after each portion of the bending area of the light guide plate is bent, the light source portions are correspondingly disposed on one side of the notch 1001 facing the lower end of the liquid crystal display device 100, and the first sub-light source 12a and the second sub-light source 12b are located on the same straight line parallel to the linear portion of the upper edge 21a, so that it is easier to control the uniformity of the entire liquid crystal display device in thickness during manufacturing.
Fig. 8 is a schematic structural diagram of another liquid crystal display device according to an embodiment of the invention. Referring to fig. 8, the structure of the liquid crystal display device provided in this embodiment is similar to that of the liquid crystal display device shown in fig. 7, the notch 1001 is located on the upper edge of the display area AA, the upper edge includes a linear portion 100a located on both sides of the notch 1001 and a boundary portion 1001a between the notch 1001 and the first sub-display area AA1, after each portion of the bending area of the light guide plate is bent, the light source includes a plurality of sub-light sources, and the plurality of sub-light sources are respectively and correspondingly disposed on one side of the notch 1001 facing the lower end of the liquid crystal display device 100, where the difference lies in that: after each part of the bent area of the light guide plate is bent, the distance between the second sub-light source 12b and the straight line part 100a of the upper edge is equal to the distance between the first sub-light source 12a and the boundary part 1001a of the upper edge, so that the lengths of the corresponding bent areas of each part are approximately the same, and the distances between the light sources and the light emitting surface of the light guide plate are approximately the same, so that the brightness uniformity of each part in the light guide plate can be improved, and the display effect is improved.
Fig. 9 is a schematic structural diagram of a backlight module in another liquid crystal display device according to an embodiment of the invention. In the backlight module, the light guide plate 11 includes a light exit region 111 and a bending region 112, the light exit region 111 is disposed corresponding to a display region of the liquid crystal display device, and dots 111a are disposed on a portion of the light guide plate 11 except the bending region 112 by using, for example, a laser uniform dotting method, for example, the dots 111a are uniformly disposed on the light exit region 111, so as to change a propagation direction of incident light to be emitted from a light exit surface of the light guide plate 11, thereby forming a uniform surface light source. Because the bending region 112 is not provided with the light-emitting portion, the dot structure is not arranged in the bending region 112, so that light is prevented from being emitted from the bending region 112, and light leakage at the edge of the liquid crystal display device is prevented.
Fig. 10 is a schematic structural diagram of a backlight module in another liquid crystal display device according to an embodiment of the invention. In the backlight module, the surface of the bending region 112 of the light guide plate 11 is provided with the reflective coating 113, so that light is reflected toward the in-plane light guide plate, the light utilization rate is improved, and light is further prevented from being emitted from the bending region 112, which causes light leakage at the edge of the liquid crystal display device.
Further, the backlight module further includes a reflector 121 located on one side of the light source 12 away from the light incident surface of the light guide plate 11, the light source 12 is located inside the reflector 121, and the scattered light is reflected into the light guide plate 11 through the reflector 121, so that the light utilization rate is improved.
In addition, the present invention also provides a method for manufacturing a liquid crystal display device, please refer to fig. 3 at the same time, the method for manufacturing a liquid crystal display device includes the following steps:
s110, providing a rigid substrate 22.
S120, forming a flexible substrate 21 on the rigid substrate; the flexible substrate 21 includes a planar region 211 and a stepped region 212; the stepped region 212 is located on at least one side edge of the planar region 211.
S130, a circuit connection layer 212a is formed in the step area 212 of the flexible substrate 21, and a display drive array 211a is formed in the flat area 211 of the flexible substrate 21.
S140, providing a color film substrate 202, and sealing the flexible substrate 21 and the color film substrate 202 in a box-to-box manner to form the liquid crystal display device 100.
S150, stripping at least partial area of the rigid substrate 22 to expose the step area 212 of the flexible substrate 21.
And S160, arranging the backlight module 10 on one side of the plane area 211 of the flexible substrate 21, which is far away from the color film substrate 202. The step area 212 of the flexible substrate 21 is bent toward the surface of the backlight module 10 away from the color film substrate 202 until the step area 212 is attached to the surface of the backlight module 10 away from the color film substrate 202.
The light guide plate 11 in the backlight module 10 includes a light exit region 111 and a bending region 112, the bending region 112 of the light guide plate 11 bends towards a side surface of the reflection sheet 13 departing from the liquid crystal display panel, and after bending, a light incident surface of the light guide plate 11 located on one side of the bending region 112 thereof is located on one side of the reflection sheet 13 departing from the liquid crystal display panel 20, the light source 12 is arranged corresponding to the light incident surface of the light guide plate 11, and is located on one side of the reflection sheet 13 departing from the liquid crystal display panel 20 together with the bending region 112 of the light guide plate 11.
When the backlight module 10 is disposed on the side of the planar region 211 of the flexible substrate 21 away from the color film substrate 202, the light source 12 and the step region 212 of the flexible substrate 21 may be respectively located at the upper end and the lower end of the liquid crystal display device, or located at different ends, or the light source 12 and the step region 212 of the flexible substrate 21 may be located at the same end of the liquid crystal display device, but the step region of the flexible substrate and the light source of the backlight module are both located on the side of the backlight module away from the liquid crystal display panel, and are both located on the side of the reflector away from the liquid crystal display panel.
The invention provides a method for manufacturing a liquid crystal display device, which comprises the steps of forming a flexible substrate 21 on a rigid substrate, wherein the flexible substrate 21 comprises a plane area 211 and a step area 212, the step area 212 is positioned at least one side edge of the plane area 211, forming a circuit connecting layer 212a in the step area 212 of the flexible substrate 21, forming a display driving array 211a in the plane area 211 of the flexible substrate 21, bending the step area 212 of the flexible substrate 21 towards the surface of one side of a backlight module 10, which is far away from a color film substrate 202, until the step area 212 is attached to the surface of one side of the backlight module 10, which is far away from the color film substrate 202, avoiding the problems that the circuit connecting layer and the display driving array are positioned in the frame area of the liquid crystal display device, thereby causing the problems of large frame width and small screen occupation ratio of the liquid crystal display device, realizing the partial overlapping of the circuit connecting layer and the display driving array, the manufacturing method of the liquid crystal display device reduces the frame width of the liquid crystal display device and increases the screen occupation ratio.
Meanwhile, the light guide plate comprises the light outlet area and the bending area which is located on at least one side of the light outlet area, the bending area is bent towards the surface, away from the liquid crystal layer, of one side of the reflector plate, and the bending area is attached to the surface, away from the liquid crystal layer, of one side of the reflector plate after bending, so that the light source is located on the surface, away from the liquid crystal layer, of one side of the reflector plate, and the problems that the light source is located in the frame area of the liquid crystal display device, and therefore the frame width of the liquid crystal display device is large. Meanwhile, the liquid crystal display panel and the backlight module are designed in the embodiment, so that the liquid crystal display device cannot increase the frame area due to the existence of the step area of the liquid crystal display panel, and cannot increase the frame area due to the existence of the light source of the backlight module, and the liquid crystal display device with an ultra-narrow frame or even a frame-free structure is fundamentally realized.
It should be noted that the above embodiments exemplarily show an implementation form of "peeling off at least a partial region of the rigid substrate to expose the step region of the flexible substrate", and it may also be configured to peel off the rigid substrate entirely, and only the flexible substrate remains, which may be set as required.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims (8)

1. A liquid crystal display device, comprising: the backlight module comprises a liquid crystal display panel and a backlight module positioned on one side of the liquid crystal display panel;
the liquid crystal display panel includes:
a flexible substrate comprising a planar region and a stepped region, the stepped region being located on at least one side edge of the planar region;
the liquid crystal layer is positioned on one side, far away from the backlight module, of the flexible substrate, and the liquid crystal layer is positioned in the plane area;
the circuit connecting layer is positioned in the step area;
a display driver array located in the planar area;
the step area is bent towards the surface of one side, away from the liquid crystal layer, of the flexible substrate, and the bent step area is attached to the surface of one side, away from the liquid crystal layer, of the backlight module;
the backlight module includes:
the light guide plate comprises a light emergent area and a bending area positioned on at least one side of the light emergent area, the light emergent area is arranged corresponding to the plane area of the flexible substrate, and a light incident surface is arranged on one side of the bending area, which is far away from the light emergent area;
the reflecting sheet is positioned on one side, away from the liquid crystal display panel, of the light guide plate, the bending area bends towards the surface of one side, away from the liquid crystal display panel, of the reflecting sheet, and the light incident surface is positioned on one side, away from the liquid crystal display panel, of the reflecting sheet after bending;
the light source is positioned on one side of the reflector plate, which is far away from the liquid crystal display panel, and is arranged corresponding to the light incident surface of the light guide plate;
the liquid crystal display device comprises an upper end and a lower end which are oppositely arranged in a first direction, the bending area of the light guide plate is positioned at the upper end of the liquid crystal display device, and the step area of the flexible substrate is positioned at the lower end of the liquid crystal display device;
the liquid crystal display device comprises a display area and a notch positioned at the upper end of the display area, wherein the display area comprises a first sub-display area positioned below the notch and second sub-display areas positioned at two sides of the notch and the first sub-display area;
the light source comprises a first sub light source and a second sub light source, the first sub light source is correspondingly arranged at one end of the first sub display area close to the gap, and the second sub light source is correspondingly arranged in the second sub display area and positioned at two sides of the gap;
the display area comprises an upper edge at the upper end thereof, the upper edge comprises linear parts at two sides of the notch, and a boundary part between the notch and the first sub-display area,
the distance between the second sub light source and the straight line part is equal to the distance between the first sub light source and the boundary part.
2. The liquid crystal display device according to claim 1, wherein the liquid crystal display device comprises a display area and a notch at an upper end thereof, an upper edge of the display area comprising linear portions at both sides of the notch;
the light source comprises a plurality of sub light sources which are correspondingly arranged on one side of the notch facing the lower end of the liquid crystal display device, and the plurality of sub light sources are positioned on the same straight line parallel to the straight line part.
3. The liquid crystal display device of claim 1, wherein the liquid crystal display device comprises an upper end and a lower end opposite to each other in a first direction, the bending region of the light guide plate and the step region of the flexible substrate are located at the same end of the liquid crystal display device,
the step area comprises a binding area located at one end far away from the plane area, and the light source is correspondingly arranged between the binding area and the plane area.
4. The LCD device of claim 3, further comprising a flexible printed circuit board and a driver chip, wherein the driver chip and the flexible printed circuit board are respectively bonded in the bonding region;
or, the flexible printed circuit board is bound in the binding region, and the driving chip is arranged on the flexible printed circuit board.
5. The liquid crystal display device of claim 1, wherein a surface of the bend region of the light guide plate is provided with a reflective coating.
6. The lcd device of claim 1, wherein the backlight module further comprises a reflector on a side of the light source away from the light incident surface, and the light source is located in the reflector.
7. The liquid crystal display device according to claim 1, wherein a portion of the light guide plate other than the bend region is provided with dots.
8. The liquid crystal display device according to claim 1, wherein a material of the light guide plate comprises polyimide.
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