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WO2017008314A1 - 液晶显示装置及其导光板的制造方法 - Google Patents

液晶显示装置及其导光板的制造方法 Download PDF

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Publication number
WO2017008314A1
WO2017008314A1 PCT/CN2015/084322 CN2015084322W WO2017008314A1 WO 2017008314 A1 WO2017008314 A1 WO 2017008314A1 CN 2015084322 W CN2015084322 W CN 2015084322W WO 2017008314 A1 WO2017008314 A1 WO 2017008314A1
Authority
WO
WIPO (PCT)
Prior art keywords
guide plate
light guide
light
liquid crystal
optical film
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/CN2015/084322
Other languages
English (en)
French (fr)
Inventor
王聪
杜鹏
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Wuhan China Star Optoelectronics Technology Co Ltd
TCL China Star Optoelectronics Technology Co Ltd
Original Assignee
Shenzhen China Star Optoelectronics Technology Co Ltd
Wuhan China Star Optoelectronics Technology Co Ltd
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 Shenzhen China Star Optoelectronics Technology Co Ltd, Wuhan China Star Optoelectronics Technology Co Ltd filed Critical Shenzhen China Star Optoelectronics Technology Co Ltd
Priority to US14/768,813 priority Critical patent/US20170153380A1/en
Publication of WO2017008314A1 publication Critical patent/WO2017008314A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

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
    • G02F1/1335—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
    • 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
    • G02B6/0065—Manufacturing aspects; Material aspects
    • 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
    • G02B6/0015—Means for improving the coupling-in of light from the light source into the light guide provided on the surface of the light guide or in the bulk of it
    • G02B6/0016—Grooves, prisms, gratings, scattering particles or rough surfaces
    • 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
    • G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
    • G02B6/0036—2-D arrangement of prisms, protrusions, indentations or roughened surfaces
    • 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
    • G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
    • G02B6/0038—Linear indentations or grooves, e.g. arc-shaped grooves or meandering grooves, extending over the full length or width of the light guide
    • 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
    • G02B6/0053—Prismatic sheet or layer; Brightness enhancement 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
    • G02B6/0081—Mechanical or electrical aspects of the light guide and light source in the lighting device peculiar to the adaptation to planar light guides, e.g. concerning packaging
    • G02B6/0086—Positioning aspects
    • G02B6/0091—Positioning aspects of the light source relative to the light guide
    • 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
    • G02F1/133509—Filters, e.g. light shielding masks
    • G02F1/133514—Colour filters
    • 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
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133615—Edge-illuminating devices, i.e. illuminating from the side
    • 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
    • G02F2202/00—Materials and properties
    • G02F2202/28—Adhesive materials or arrangements

Definitions

  • the present invention relates to the field of display technology, and in particular to a liquid crystal display device and a method of manufacturing a light guide plate provided in the liquid crystal display device.
  • Backlit liquid crystal display device includes LCD panel and backlight module (Backlight) Module), taking the side-in backlight module as an example, the backlight is disposed on the edge of the back panel behind the liquid crystal panel, and the light emitted by the backlight is from the light guide plate (LGP, Light Guide)
  • LGP Light Guide
  • the light-incident surface of one side of the plate enters the light guide plate, is reflected and diffused, and is emitted from the light-emitting surface of the light guide plate, and is then supplied to the liquid crystal panel through the optical film group to form a surface light source.
  • the key factor to ensure the display quality of the liquid crystal display device is to ensure that the light from the backlight is sufficiently mixed, as shown by the distance between the backlight and the display area of the liquid crystal panel, which is indispensable for the actual assembly.
  • the error is such that the distance between the backlight and the display area is smaller than that required for the assembly design, resulting in a small distance between the backlight and the light incident surface of the light guide plate, so that the light emitted by the backlight is insufficiently mixed and brightness and color difference occur. So that Hotspot appears on display Mura (light and dark unevenness) phenomenon.
  • embodiments of the present invention provide a liquid crystal display device and a method of manufacturing the same, which can improve Hotspot during display. Mura phenomenon.
  • An embodiment of the invention provides a liquid crystal display device including a backlight, a back plate, a light guide plate on the back plate, an optical film set on the light guide plate, a liquid crystal panel on the optical film set, and a light guide plate.
  • the liquid crystal panel is pressed and fixed on the optical frame of the optical film group
  • the backlight is located between the plastic frame and the side of the light guide plate
  • the side of the light guide plate is the light incident surface of the light guide plate
  • the light guide plate is made of a material Glass
  • the light-emitting surface of the light guide plate is provided with a plurality of first convex portions
  • the light guide plate is provided with a groove, and the bottom surface of the groove is a light-emitting surface of the light guide plate, and the sidewall of the groove is parallel to the light-incident surface of the light guide plate and has a predetermined thickness therebetween.
  • the groove and the plurality of first protrusions are an integrally formed structure, and the groove and the plurality of first protrusions are obtained by etching the glass substrate of the rectangular body with acidic liquid.
  • the liquid crystal panel includes an array substrate and a color filter substrate.
  • the color film substrate is adjacent to the optical film group and the edge thereof is located in the groove.
  • the liquid crystal display device further includes a light shielding tape for realizing a color film substrate and the light guide plate. Relatively fixed, one side of the light-shielding tape abuts the plastic frame, and the other side abuts or overlaps the edge of the optical film.
  • One end of the plastic frame is fixed on the back plate, and the other end of the plastic frame is fixed to the array substrate and the array substrate The edges are flush.
  • a liquid crystal display device including a back plate, a light guide plate on the back plate, an optical film set on the light guide plate, a liquid crystal panel on the optical film group, and a light guide plate and The liquid crystal panel is pressed against the plastic frame fixed on the optical film group, wherein the light emitting surface of the light guide plate is provided with a plurality of first convex portions, and the lower surface of the optical film group is adjacent to the light guide plate and is provided with a plurality of second portions.
  • a convex portion a plurality of second convex portions are alternately arranged with the plurality of first convex portions, and each of the first convex portions and the adjacent two second convex portions is filled with a light-transmitting adhesive, so that the optical film group is under The surface and the light-emitting surface of the light guide plate are fixed by a transparent adhesive.
  • the liquid crystal display device further includes a backlight, and the backlight is located between the plastic frame and the side of the light guide plate, and the side of the light guide plate is a light incident surface of the light guide plate.
  • the optical film set includes a prism sheet having a plurality of second protrusions.
  • the light guide plate is made of glass or polycarbonate PC.
  • the light guide plate is provided with a groove, and the bottom surface of the groove is a light-emitting surface of the light guide plate, and the sidewall of the groove is parallel to the light-incident surface of the light guide plate and has a predetermined thickness therebetween.
  • the groove and the plurality of first protrusions are an integrally formed structure, and the groove and the plurality of first protrusions are obtained by etching the glass substrate of the rectangular body with acidic liquid.
  • the liquid crystal panel includes an array substrate and a color filter substrate.
  • the color film substrate is adjacent to the optical film group and the edge thereof is located in the groove.
  • the liquid crystal display device further includes a light shielding tape for realizing a color film substrate and the light guide plate. Relatively fixed, one side of the light-shielding tape abuts the plastic frame, and the other side abuts or overlaps the edge of the optical film.
  • One end of the plastic frame is fixed on the back plate, and the other end of the plastic frame is fixed to the array substrate and the array substrate The edges are flush.
  • the upper surface of the optical film set and the liquid crystal panel are fixed by a transparent adhesive.
  • a further embodiment of the present invention provides a method of manufacturing a light guide plate of a liquid crystal display device.
  • the liquid crystal display device further includes a back plate carrying a light guide plate, an optical film set on the light guide plate, and an optical film set on the optical film set.
  • the method comprising: forming a plurality of dots having a predetermined shape on one surface of the two glass substrates; Applying a ring of sealant on the other surface of the glass substrate other than the area of the plurality of dots, and passing the two glass substrates through the sealant to the box; respectively etching the other surface of the two glass substrates to On
  • the method further comprises: coating a ring of corrosion-resistant layer on the other surface of the two glass substrates, respectively, the corrosion-resistant layer corresponding to the Outside the area where multiple dots are located; separate two glass substrates.
  • the light-emitting surface of the light guide plate has a plurality of first convex portions
  • the lower surface of the optical film group has a plurality of second convex portions
  • the plurality of second portions are passed through
  • the convex portion and the plurality of first convex portions are staggered, and the transparent adhesive is filled in the staggered space, so that the optical film group and the light guide plate are fixed, since the light guide plate and the backlight are both fixed relative to the back plate and the liquid crystal is fixed.
  • the panel must be positioned corresponding to the position of the optical film set, so that the relative position of the liquid crystal panel and the backlight can be fixed, so that the distance between the backlight and the display area of the liquid crystal panel can be equal to the assembly design, thereby ensuring the backlight and the guide.
  • the distance between the light-incident surfaces of the light board is in accordance with the assembly design, so as to ensure that the light from the backlight is sufficiently mixed, and the Hotspot is improved. Mura phenomenon.
  • FIG. 1 is a schematic structural view of an embodiment of a liquid crystal display device of the present invention.
  • FIG. 2 is a flow chart showing an embodiment of a method for manufacturing a glass material light guide plate according to the present invention
  • FIG. 3 is a schematic view showing the formation of a plurality of dots on a glass substrate according to the present invention.
  • Figure 4 is a schematic view of two glass substrate pairs of the present invention.
  • FIG. 5 is a schematic view showing the etching of two glass substrates to form a first convex portion according to the present invention
  • FIG. 6 is a schematic view of a light guide plate obtained by separating two glass substrates according to the present invention.
  • Fig. 7 is a view showing the configuration of another embodiment of the liquid crystal display device of the present invention.
  • the liquid crystal display device 10 includes a backlight module and a liquid crystal panel 14 .
  • the backlight module includes a back plate 11 , a light guide plate 12 on the back plate 11 , and an optical film on the light guide plate 12 .
  • the plastic frame 15 is provided with a groove 151 and encloses the liquid crystal panel 14 through the groove 151 to achieve pressure holding, and the light-emitting surface of the light guide plate 12 is disposed.
  • the first convex portion 121, the optical film group 13 includes a prism sheet and other optical films, and the lower surface of the prism sheet is adjacent to the light-emitting surface of the light guide plate 12 and is provided with a plurality of second convex portions 131.
  • the liquid crystal display device 10 of the present embodiment may be a side-lit liquid crystal display device as shown, that is, the backlight 17 of the liquid crystal display device 10 is located between the plastic frame 15 and the side surface of the light guide plate 12, and the side of the light guide plate 12 at this time.
  • the light incident surface of the light guide plate 12 is perpendicular to the light exit surface, wherein the backlight 17 can be an LED light strip (Light Emitting Diode Light Bar, LED strip light).
  • the liquid crystal display device 10 can also be a direct type liquid crystal display device, that is, the backlight 17 is located between the back plate 11 and the bottom surface of the light guide plate 12, and the bottom surface of the light guide plate 12 is the entrance of the light guide plate 12. Glossy and opposite to the light exit surface.
  • the plurality of second protrusions 131 are interlaced with the plurality of first protrusions 121, and each of the first protrusions 121 and the adjacent two second protrusions 131 are filled with light and light.
  • Glue such as OCA (Optically Clear Adhesive, a special transparent adhesive, can make the lower surface of the prism sheet 131 and the light-emitting surface of the light guide plate 12 fixed by the transparent adhesive, since both the light guide plate 12 and the backlight 17 are relatively fixed to the back plate 11, Moreover, the liquid crystal panel 14 must correspond to the position of the prism sheet, and the upper surface of the liquid crystal panel 14 and the optical film group 13 can also be fixed by the transparent adhesive, so that the relative relationship between the liquid crystal panel 14 and the backlight 17 can be fixed.
  • OCA Optically Clear Adhesive
  • the distance A' between the Areas is equal to that required for the assembly design, and is not reduced by the error generated during assembly, thereby ensuring that the distance between the backlight 17 and the light incident surface of the light guide plate 12 is in accordance with the assembly design, ensuring The light from the backlight 17 is well mixed, minimizing the difference in brightness and color during display, and improving the Hotspot display. Mura phenomenon.
  • the same Hotspot is produced in the liquid crystal display device of the prior art.
  • the ratio of the distance between the backlight and the display area of the liquid crystal panel and the distance between the two LED lamps on the backlight is smaller.
  • the present embodiment can increase the distance between the two LED lamps on the backlight 17, thereby reducing the number of LED lamps on the backlight 17, and reducing the cost.
  • the material of the light guide plate 12 can be PC (Polycarbonate, polycarbonate or engineering plastic) used in the prior art, or can be glass, and the light spreads in the glass.
  • PC Polycarbonate, polycarbonate or engineering plastic
  • the point source is converted into a surface source and achieves the same uniformity, and the path of the light to be refracted in the glass-made light guide plate 12 is smaller than the path required to be refracted in the light guide plate 12 of the PC material, so
  • the glass can reduce the thickness of the light guide plate 12, thereby reducing the thickness of the entire backlight module.
  • Fig. 2 is a flow chart showing an embodiment of a method of manufacturing a glass-made light guide plate 12 of the present invention.
  • the manufacturing method of the glass material light guide plate 12 includes:
  • Step S21 forming a plurality of dots having a predetermined shape on one surface of the two glass substrates, respectively.
  • a plurality of convex transparent and uniform size dots (also referred to as FM dots or light diffusion dots) 32 may be printed on the transparent two glass substrates 31 by screen printing technology, wherein the dots 32 are The shape may be a sphere as shown in the figure or a square.
  • Step S22 Apply a ring of sealant on the other surface than the area where the plurality of dot points of one of the two glass substrates are located, and pass the two glass substrates through the sealant to the box.
  • the sealant 33 is applied outside the area where the plurality of dots 32 are located, that is, disposed at the edges of the two glass substrates 31. After the two glass substrates 31 are placed on the box, the sealant 33 can realize two pieces. Sealing of the area between the glass substrates 31.
  • Step S23 etching the other surface of the two glass substrates separately to form grooves on the two glass substrates, and a plurality of convex portions are formed on the bottom surface of the groove.
  • two glass substrates 31 can be immersed in HF (Hydrofluoric).
  • a plurality of first convex portions 121 are formed by etching in the acid, hydrofluoric acid solution.
  • the light guide plate 12 of the embodiment of the present invention may be provided with the groove 122 shown in FIG. 1 and FIG. A portion of the predetermined thickness between the 122 and the light incident surface of the light guide plate 12 supports the liquid crystal panel 14 and the optical film group 13 is housed in the recess 122, and the plurality of first convex portions 121 are located on the bottom surface of the recess 122.
  • the groove 122 and the plurality of first protrusions 121 may be an integrally formed structure, that is, the groove 122 and the plurality of first protrusions 121 are made by etching the glass substrate 31 of the rectangular body with acidic liquid, specifically, Before the other surfaces of the two glass substrates 31 are respectively etched, as shown in FIG. 4, a ring of corrosion-resistant layer 34 may be coated on the other surface of the two glass substrates 31, respectively. Outside the region where the plurality of dots 32 are located, the portion covered by the corrosion-resistant layer 34 is not corroded while the plurality of first convex portions 121 are formed by etching, and the corrosion-resistant layer 34 can be manufactured together with the sealant 33.
  • the material is the same, for example, a thermoplastic sealant, or it can be made of other different materials.
  • Step S24 separating the two glass substrates.
  • the two glass substrates 31 can be heated to soften the thermoplastic sealant 33, and then the two glass substrates 31 are separated to obtain the light guide plate 12.
  • the two glass substrates 31 having a size larger than the design requirement may be cut first, so that the size of the cut glass substrate 31 is equal to the light guide plate 12 required by the design, and then heated and separated.
  • Fig. 7 is a view showing the configuration of another embodiment of the liquid crystal display device of the present invention.
  • the difference from the description of the above embodiment is that the color film substrate 141 is adjacent to the optical film group 13 (or the light guide plate 12), and the edge of the color film substrate 141 is carried on the groove of the light guide plate 12.
  • one side of the light-shielding tape 18 which is opaque can be brought into contact with the frame 15 and the other side abuts or overlaps with the edge of the optical film group 13, and not only the OLB of the liquid crystal display device 10 can be prevented (Outer) Lead
  • the outer lead soldering area, light leakage occurs, and the adhesive between the color filter substrate 141 and the light guide plate 12 can be realized by using the adhesive on the light-shielding tape 18, so that the plastic frame 15 does not need to be arranged as shown in FIG.
  • the groove 151 can fix the liquid crystal panel 14 on the light-emitting surface of the light guide plate 12.
  • the plastic frame 15 and the edge of the array substrate 142 are flush, and the width of the plastic frame 15 can be minimized. The narrow frame and the borderless design of the liquid crystal display device 10 are facilitated.
  • FIGS. 1 and 7 are merely schematic views illustrating the purpose of the invention of the embodiments of the present invention, and other structures not shown may be referred to the prior art.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Nonlinear Science (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Planar Illumination Modules (AREA)
  • Liquid Crystal (AREA)
  • Light Guides In General And Applications Therefor (AREA)

Abstract

一种液晶显示装置及其导光板的制造方法，能够改善显示时的Hotspot Mura现象，并且降低背光模组的厚度，有利于液晶显示装置的窄边框及无边框设计。其中，导光板（12）的出光面设置有多个第一凸部（121），光学膜片组（13）的棱镜片与导光板（12）相邻并设置有多个第二凸部（131），第二凸部（131）与第一凸部（121）交错设置，且每一第一凸部（121）和相邻两个第二凸部（131）之间充满透光粘胶，使得棱镜片和导光板（12）相固定。

Description

液晶显示装置及其导光板的制造方法
【技术领域】
本发明涉及显示技术领域，特别是涉及一种液晶显示装置以及所述液晶显示装置所具有的导光板的制造方法。
【背景技术】
背光型液晶显示装置（LCD, Liquid Crystal Display）包括液晶面板及背光模组（Backlight Module），以侧入式背光模组为例，将背光源设置于液晶面板侧后方的背板边缘，背光源发出的光线从导光板（LGP，Light Guide Plate）一侧的入光面进入导光板，经反射和扩散后从导光板的出光面射出，再经由光学膜片组形成面光源提供给液晶面板。确保液晶显示装置的显示品质的关键因素就是确保背光源发出的光线混光充足，具体表现为背光源与液晶面板的显示区域之间的距离符合组装设计所需，然而在实际组装时难免会产生误差，使得背光源与显示区域之间的距离小于组装设计所需，导致背光源与导光板的入光面之间的距离较小，使得背光源发出的光线混光不足并出现亮度和颜色差异，从而在显示时出现Hotspot Mura（亮暗不均）现象。
【发明内容】
有鉴于此，本发明实施例提供一种液晶显示装置及其导光板的制造方法，能够改善显示时的Hotspot Mura现象。
本发明一实施例提供一种液晶显示装置，包括背光源、背板、位于背板上的导光板、位于导光板上的光学膜片组、位于光学膜片组上的液晶面板以及围绕导光板并将液晶面板压持固定于光学膜片组上的胶框，背光源位于胶框和导光板的侧面之间，导光板的侧面为导光板的入光面，其中，导光板的制造材质为玻璃，导光板的出光面设置有多个第一凸部，光学膜片组的棱镜片的下表面与导光板相邻并设置有多个第二凸部，多个第二凸部与多个第一凸部交错设置，且每一第一凸部和相邻两个第二凸部之间充满透光粘胶，使得棱镜片的下表面和导光板的出光面之间通过透光粘胶固定，并且光学膜片组的上表面和液晶面板之间通过透光粘胶固定。
其中，导光板设置有凹槽，凹槽的底面为导光板的出光面，凹槽的侧壁与导光板的入光面相平行且两者之间具有预定厚度。
其中，凹槽和多个第一凸部为一体成型结构，且凹槽和多个第一凸部为对矩形体的玻璃基板采用酸性液体腐蚀制得。
其中，液晶面板包括阵列基板和彩膜基板，彩膜基板邻近光学膜片组且其边缘位于所述凹槽中，液晶显示装置还包括遮光胶带，用以实现彩膜基板与导光板之间的相对固定，遮光胶带的一边与胶框相抵接、另一边与光学膜片的边缘相抵接或相重叠，胶框的一端固定于背板上，胶框的另一端与阵列基板固定且与阵列基板的边缘平齐。
本发明另一实施例提供一种液晶显示装置，包括背板、位于背板上的导光板、位于导光板上的光学膜片组、位于光学膜片组上的液晶面板以及围绕导光板并将液晶面板压持固定于光学膜片组上的胶框，其中，导光板的出光面设置有多个第一凸部，光学膜片组的下表面与导光板相邻并设置有多个第二凸部，多个第二凸部与多个第一凸部交错设置，且每一第一凸部和相邻两个第二凸部之间充满透光粘胶，使得光学膜片组的下表面和导光板的出光面之间通过透光粘胶固定。
其中，液晶显示装置还包括背光源，所述背光源位于胶框和导光板的侧面之间，所述导光板的侧面为所述导光板的入光面。
其中，光学膜片组包括棱镜片，所述棱镜片具有多个第二凸部。
其中，导光板的制造材质为玻璃或聚碳酸酯PC。
其中，导光板设置有凹槽，凹槽的底面为导光板的出光面，凹槽的侧壁与导光板的入光面相平行且两者之间具有预定厚度。
其中，凹槽和多个第一凸部为一体成型结构，且凹槽和多个第一凸部为对矩形体的玻璃基板采用酸性液体腐蚀制得。
其中，液晶面板包括阵列基板和彩膜基板，彩膜基板邻近光学膜片组且其边缘位于所述凹槽中，液晶显示装置还包括遮光胶带，用以实现彩膜基板与导光板之间的相对固定，遮光胶带的一边与胶框相抵接、另一边与光学膜片的边缘相抵接或相重叠，胶框的一端固定于背板上，胶框的另一端与阵列基板固定且与阵列基板的边缘平齐。
其中，光学膜片组的上表面和液晶面板之间通过透光粘胶固定。
本发明又一实施例提供一种液晶显示装置的导光板的制造方法，所述液晶显示装置还包括承载导光板的背板、位于导光板上的光学膜片组、位于光学膜片组上的液晶面板以及围绕导光板并将液晶面板压持固定于光学膜片组上的胶框，其中，导光板的出光面设置有多个第一凸部，光学膜片组的下表面与导光板相邻并设置有多个第二凸部，多个第二凸部与多个第一凸部交错设置，且每一第一凸部和相邻两个第二凸部之间充满透光粘胶，使得光学膜片组的下表面和导光板的出光面之间通过透光粘胶固定，所述方法包括：分别在两块玻璃基板的一表面形成具有预定形状的多个网点；在两块玻璃基板中一个的多个网点所在区域之外的另一表面上涂布一圈封胶，并将两块玻璃基板通过封胶对盒；分别对两块玻璃基板的另一表面进行腐蚀，以在两块玻璃基板上分别形成凹槽，且凹槽的底面上形成有多个凸部。
其中，分别对两块玻璃基板的另一表面进行腐蚀的步骤之前，所述方法还包括：分别在两块玻璃基板的另一表面上涂布一圈耐腐蚀层，耐腐蚀层对应于所述多个网点所在区域之外；分离两块玻璃基板。
本发明实施例的液晶显示装置及其导光板的制造方法，设计导光板的出光面具有多个第一凸部、光学膜片组的下表面具有多个第二凸部，通过多个第二凸部和多个第一凸部交错设置，并在交错设置的空间内填充透光粘胶，使得光学膜片组和导光板相固定，由于导光板和背光源均与背板相对固定且液晶面板必须与光学膜片组的位置对应设置，因此可以固定液晶面板和背光源的相对位置，使得背光源和液晶面板的显示区域之间的距离能够等于组装设计所需，从而确保背光源与导光板的入光面之间的距离符合组装设计所需，进而确保背光源发出的光线混光充足，改善显示时的Hotspot Mura现象。
【附图说明】
图1是本发明的液晶显示装置一实施例的结构示意图；
图2是本发明玻璃材质的导光板的制造方法一实施例的流程图；
图3是本发明在玻璃基板上形成多个网点的示意图；
图4是本发明的两块玻璃基板对盒的示意图；
图5是本发明对两块玻璃基板进行腐蚀形成第一凸部的示意图；
图6是本发明分离两块玻璃基板得到的导光板的示意图；
图7是本发明的液晶显示装置另一实施例的结构示意图。
【具体实施方式】
下面将结合本发明实施例中的附图，对本发明所提供的示例性的实施例的技术方案进行清楚、完整地描述。
图1是本发明的液晶显示装置一实施例的结构示意图。参阅图1所示，所述液晶显示装置10包括背光模组和液晶面板14，所述背光模组包括背板11、位于背板11上的导光板12、位于导光板12上的光学膜片组13、位于光学膜片组13上的液晶面板14以及围绕导光板12并将液晶面板14压持固定于光学膜片组13上的胶框15，其中，液晶面板14包括彩膜基板141和阵列基板142，阵列基板142与光学膜片组13邻近设置，胶框15设置有沟槽151并通过沟槽151将液晶面板14包住以实现压持固定，导光板12的出光面设置有多个第一凸部121，光学膜片组13包括棱镜片以及其他光学膜片，所述棱镜片的下表面与导光板12的出光面相邻并设置有多个第二凸部131。
本实施例的液晶显示装置10可以为图示的侧入式液晶显示装置，即，液晶显示装置10的背光源17位于胶框15和导光板12的侧面之间，此时导光板12的侧面为导光板12的入光面且与出光面相垂直，其中背光源17可以为LED灯条（Light Emitting Diode Light Bar，发光二极管灯条）。当然，所述液晶显示装置10也可以为直下式液晶显示装置，即，所述背光源17位于背板11和导光板12的底面之间，此时导光板12的底面为导光板12的入光面且与出光面相对。
在组装液晶显示装置10时，多个第二凸部131与多个第一凸部121交错设置，且每一第一凸部121和相邻两个第二凸部131之间充满透光粘胶，例如OCA（Optically Clear Adhesive，特种透明黏胶剂），即可使得棱镜片131的下表面和导光板12的出光面之间通过透光粘胶固定，由于导光板12和背光源17均与背板11相对固定，且液晶面板14必须与棱镜片的位置对应，液晶面板14和光学膜片组13的上表面和之间也可以通过透光粘胶固定，因此可以固定液晶面板14和背光源17之间的相对位置，使得背光源17和液晶面板14的显示区域AA（Active Area）之间的距离A’等于组装设计所需，不会因组装时产生的误差而变小，从而确保背光源17与导光板12的入光面之间的距离符合组装设计所需，确保背光源17发出的光线混光充足，最大程度的减少显示时的亮度和颜色差异，改善显示时的Hotspot Mura现象。
换言之，在与现有技术的液晶显示装置产生同样Hotspot Mura现象的情况下，结合本领域的公知常识——背光源和液晶面板的显示区域之间的距离与背光源上两个LED灯之间的距离的比值越小则Hotspot Mura现象越严重，可知，本实施例可以增大背光源17上两个LED灯之间的距离，从而减少背光源17上LED灯的数量，降低成本。
请再次参阅图1所示，所述导光板12的制造材质可以为现有技术所采用的PC（Polycarbonate，聚碳酸酯或工程塑料），也可以为玻璃，并且由于光线在玻璃中的扩散良于PC，因此要将点光源转换为面光源并实现相同的均匀度，光线在玻璃材质的导光板12中所需折射的路径小于在PC材质的导光板12中所需折射的路径，因此采用玻璃能够降低导光板12的厚度，从而降低整个背光模组的厚度。
图2是本发明玻璃材质的导光板12的制造方法一实施例的流程图。参阅图2所示，所述玻璃材质的导光板12的制造方法包括：
步骤S21：分别在两块玻璃基板的一表面形成具有预定形状的多个网点。
结合图3所示，可以采用丝网印刷技术在透明的两块玻璃基板31上印刷多个凸起透明且统一大小的网点（又称调频网点或光扩散点）32，其中所述网点32的形状可以为图中所示的球形，也可以为方形。
步骤S22：在两块玻璃基板中一个的多个网点所在区域之外的另一表面上涂布一圈封胶，并将两块玻璃基板通过封胶对盒。
结合图4所示，封胶33涂布于多个网点32所在区域之外，即设置于两块玻璃基板31四周的边缘处，两块玻璃基板31对盒之后，封胶33能够实现两块玻璃基板31之间区域的密封。
步骤S23：分别对两块玻璃基板的另一表面进行腐蚀，以在两块玻璃基板上分别形成凹槽，且凹槽的底面上形成有多个凸部。
结合图5所示，可以将两块玻璃基板31浸入采用HF（Hydrofluoric acid，氢氟酸）溶液中腐蚀形成多个第一凸部121。
为避免液晶面板14直接压持于光学膜片组13上以损害脆弱的光学膜片组13，本发明实施例的导光板12可以设置图1和图5所示的凹槽122，利用凹槽122与导光板12的入光面之间的预定厚度的部分支撑液晶面板14且光学膜片组13容置于凹槽122中，且多个第一凸部121位于凹槽122的底面。其中，凹槽122和多个第一凸部121可以为一体成型结构，即凹槽122和多个第一凸部121为对矩形体的玻璃基板31采用酸性液体腐蚀制得，具体地，在分别对两块玻璃基板31的另一表面进行腐蚀之前，结合图4所示，可以分别在两块玻璃基板31的另一表面上涂布一圈耐腐蚀层34，所述耐腐蚀层34对应于多个网点32所在区域之外，在腐蚀形成多个第一凸部121的同时，被耐腐蚀层34遮盖的部分不会被腐蚀，所述耐腐蚀层34既可以与封胶33的制造材质一样，例如为热塑性封胶，也可以为其他不同的制造材质。
步骤S24：分离两块玻璃基板。
结合图5和图6所示，可对两块玻璃基板31加热，使得热塑性封胶33软化，而后分离两块玻璃基板31得到所述导光板12。其中，对于尺寸大于设计要求的两块玻璃基板31可以先进行切割，使得切割后的玻璃基板31的尺寸等于设计要求的导光板12，再加热分离。
图7是本发明的液晶显示装置另一实施例的结构示意图。在上述实施例的描述基础上但与其不同之处在于，本实施例设计彩膜基板141邻近光学膜片组13（或导光板12），彩膜基板141的边缘承载于导光板12的凹槽122中，并且，可以采用不透光的遮光胶带18的一边与胶框15相抵接、另一边与光学膜片组13的边缘相抵接或相重叠，不仅能够防止液晶显示装置10的OLB（Outer Lead Bonding，外引线焊接）区域出现漏光现象，而且可以利用遮光胶带18上自带的黏胶实现彩膜基板141和导光板12之间的相对固定，从而胶框15无需设置如图1所示的沟槽151即可将液晶面板14固定于导光板12的出光面上，在此基础上，胶框15与阵列基板142的边缘平齐，可以最大程度的减小胶框15的宽度，从而有利于液晶显示装置10的窄边框及无边框设计。
应该理解到，图1和图7所示的液晶显示装置仅为阐述本发明实施例的发明目的示意图，其并未示出的其他结构可参阅现有技术。
以上所述仅为本发明的实施例，并非因此限制本发明的专利范围，凡是利用本发明说明书及附图内容所作的等效结构或等效流程变换，例如各实施例之间技术特征的相互结合，或直接或间接运用在其他相关的技术领域，均同理包括在本发明的专利保护范围内。

Claims (14)

  1. 一种液晶显示装置，其中，包括背光源、背板、位于所述背板上的导光板、位于所述导光板上的光学膜片组、位于所述光学膜片组上的液晶面板以及围绕所述导光板并将所述液晶面板压持固定于所述光学膜片组上的胶框，所述背光源位于所述胶框和所述导光板的侧面之间，所述导光板的侧面为所述导光板的入光面，其中，所述导光板的制造材质为玻璃，所述导光板的出光面设置有多个第一凸部，所述光学膜片组的棱镜片的下表面与所述导光板相邻并设置有多个第二凸部，所述多个第二凸部与所述多个第一凸部交错设置，且每一所述第一凸部和相邻两个所述第二凸部之间充满透光粘胶，使得所述棱镜片的下表面和所述导光板的出光面之间通过所述透光粘胶固定，并且所述光学膜片组的上表面和所述液晶面板之间通过所述透光粘胶固定。
  2. 根据权利要求1所述的液晶显示装置，其中，所述导光板设置有凹槽，所述凹槽的底面为所述导光板的出光面，所述凹槽的侧壁与所述导光板的入光面相平行且两者之间具有预定厚度。
  3. 根据权利要求2所述的液晶显示装置，其中，所述凹槽和所述多个第一凸部为一体成型结构，且所述凹槽和所述多个第一凸部为对矩形体的玻璃基板采用酸性液体腐蚀制得。
  4. 根据权利要求2所述的液晶显示装置，其中，所述液晶面板包括阵列基板和彩膜基板，所述彩膜基板邻近所述光学膜片组且其边缘位于所述凹槽中，所述液晶显示装置还包括遮光胶带，用以实现所述彩膜基板与所述导光板之间的相对固定，所述遮光胶带的一边与所述胶框相抵接、另一边与所述光学膜片的边缘相抵接或相重叠，所述胶框的一端固定于所述背板上，所述胶框的另一端与所述阵列基板固定且与所述阵列基板的边缘平齐。
  5. 一种液晶显示装置，其中，包括背板、位于所述背板上的导光板、位于所述导光板上的光学膜片组、位于所述光学膜片组上的液晶面板以及围绕所述导光板并将所述液晶面板压持固定于所述光学膜片组上的胶框，其中，所述导光板的出光面设置有多个第一凸部，所述光学膜片组的下表面与所述导光板相邻并设置有多个第二凸部，所述多个第二凸部与所述多个第一凸部交错设置，且每一所述第一凸部和相邻两个所述第二凸部之间充满透光粘胶，使得所述光学膜片组的下表面和所述导光板的出光面之间通过所述透光粘胶固定。
  6. 根据权利要求5所述的液晶显示装置，其中，所述液晶显示装置还包括背光源，所述背光源位于所述胶框和所述导光板的侧面之间，所述导光板的侧面为所述导光板的入光面。
  7. 根据权利要求5所述的液晶显示装置，其中，所述光学膜片组包括棱镜片，所述棱镜片具有所述多个第二凸部。
  8. 根据权利要求5所述的液晶显示装置，其中，所述导光板的制造材质为玻璃或聚碳酸酯PC。
  9. 根据权利要求8所述的液晶显示装置，其中，所述导光板设置有凹槽，所述凹槽的底面为所述导光板的出光面，所述凹槽的侧壁与所述导光板的入光面相平行且两者之间具有预定厚度。
  10. 根据权利要求9所述的液晶显示装置，其中，所述凹槽和所述多个第一凸部为一体成型结构，且所述凹槽和所述多个第一凸部为对矩形体的玻璃基板采用酸性液体腐蚀制得。
  11. 根据权利要求9所述的液晶显示装置，其中，所述液晶面板包括阵列基板和彩膜基板，所述彩膜基板邻近所述光学膜片组且其边缘位于所述凹槽中，所述液晶显示装置还包括遮光胶带，用以实现所述彩膜基板与所述导光板之间的相对固定，所述遮光胶带的一边与所述胶框相抵接、另一边与所述光学膜片的边缘相抵接或相重叠，所述胶框的一端固定于所述背板上，所述胶框的另一端与所述阵列基板固定且与所述阵列基板的边缘平齐。
  12. 根据权利要求5所述的液晶显示装置，其中，所述光学膜片组的上表面和所述液晶面板之间通过所述透光粘胶固定。
  13. 一种液晶显示装置的导光板的制造方法，其中，所述液晶显示装置还包括承载所述导光板的背板、位于所述导光板上的光学膜片组、位于所述光学膜片组上的液晶面板以及围绕所述导光板并将所述液晶面板压持固定于所述光学膜片组上的胶框，其中，所述导光板的出光面设置有多个第一凸部，所述光学膜片组的下表面与所述导光板相邻并设置有多个第二凸部，所述多个第二凸部与所述多个第一凸部交错设置，且每一所述第一凸部和相邻两个所述第二凸部之间充满透光粘胶，使得所述光学膜片组的下表面和所述导光板的出光面之间通过所述透光粘胶固定，所述方法包括：
    分别在两块玻璃基板的一表面形成具有预定形状的多个网点；
    在所述两块玻璃基板中一个的所述多个网点所在区域之外的另一表面上涂布一圈封胶，并将所述两块玻璃基板通过所述封胶对盒；
    分别对两块所述玻璃基板的另一表面进行腐蚀，以在两块所述玻璃基板上分别形成凹槽，且所述凹槽的底面上形成有多个凸部；
    分离两块所述玻璃基板。
  14. 根据权利要求13所述的方法，其中，所述分别对两块所述玻璃基板的另一表面进行腐蚀的步骤之前，所述方法还包括：
    分别在两块所述玻璃基板的另一表面上涂布一圈耐腐蚀层，所述耐腐蚀层对应于所述多个网点所在区域之外。
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