WO2022183525A1 - 液晶显示装置 - Google Patents

液晶显示装置 Download PDF

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Publication number
WO2022183525A1
WO2022183525A1 PCT/CN2021/080785 CN2021080785W WO2022183525A1 WO 2022183525 A1 WO2022183525 A1 WO 2022183525A1 CN 2021080785 W CN2021080785 W CN 2021080785W WO 2022183525 A1 WO2022183525 A1 WO 2022183525A1
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WO
WIPO (PCT)
Prior art keywords
liquid crystal
conductive
display device
crystal display
branch
Prior art date
Application number
PCT/CN2021/080785
Other languages
English (en)
French (fr)
Inventor
张颉
朱磊
Original Assignee
武汉华星光电技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 武汉华星光电技术有限公司 filed Critical 武汉华星光电技术有限公司
Priority to US17/289,186 priority Critical patent/US20240012284A1/en
Publication of WO2022183525A1 publication Critical patent/WO2022183525A1/zh

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Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/133528—Polarisers
    • G02F1/133531—Polarisers characterised by the arrangement of polariser or analyser axes
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/133308—Support structures for LCD panels, e.g. frames or bezels
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/133308—Support structures for LCD panels, e.g. frames or bezels
    • G02F1/133314—Back frames
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/133528—Polarisers
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • G02F1/133608—Direct backlight including particular frames or supporting means
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • G02F1/133612—Electrical details

Definitions

  • the present application relates to the field of display technology, and in particular, to a liquid crystal display device.
  • the mobile phone whistling problem has become a major problem in the display screen industry in recent years.
  • the so-called whistling means that when people's ears are close to the screen of the mobile phone, they will continue to hear a whistling sound similar to electric current.
  • the volume of the sound varies with the sensitivity of different people to low-frequency/high-frequency sound. Therefore, the whistling of the mobile phone affects the user experience.
  • Embodiments of the present application provide a liquid crystal display device, which can reduce the risk of howling occurring in the liquid crystal display device.
  • Embodiments of the present application provide a liquid crystal display device, which includes:
  • the backlight module includes a conductive back frame
  • the display panel is arranged on the backlight module, the display panel includes a liquid crystal cell and a first polarizer, and the first polarizer is arranged on the side of the liquid crystal cell facing the backlight module ;
  • the first polarizer comprises a conductive structure layer, a first base layer and a polarizing layer sequentially arranged on the backlight module;
  • a conductive member is electrically connected to the conductive back frame and the conductive structure layer.
  • the conductive structure layer includes a first adhesive layer and a conductive material, and the conductive material is doped in the first adhesive layer.
  • the conductive material includes at least one of silver, gold and graphene.
  • the conductive structure layer includes a first adhesive layer and a light-transmitting conductive layer that are stacked in sequence, and the light-transmitting conductive layer is formed when the first base layer faces the first base layer. on one side of an adhesive layer; the conductive member is connected with the light-transmitting conductive layer.
  • the light-transmitting conductive layer includes the first branch, the second branch, and a trunk portion, and the first branch and the second branch are both connected to the trunk portion. the same side;
  • the stem portion extends along a first direction
  • the first branch extends outwardly from the stem portion along a second direction
  • the second branch extends outwardly from the stem portion along a third direction, wherein The first direction, the second direction and the third direction are all in the same plane.
  • the first direction, the second direction, and the third direction are set to intersect with each other.
  • the first direction is parallel to the second direction, and the second direction intersects the third direction Z.
  • the width of the trunk portion is greater than the width of the first branch and the width of the second branch.
  • both the first branch and the second branch are arranged on the periphery of the pixels of the liquid crystal display device.
  • the conductive structure layer includes a first adhesive layer, a light-transmitting conductive layer, and an intermediate adhesive layer that are stacked in sequence, and the intermediate adhesive layer is connected to the first base layer;
  • the conductive member is connected to the light-transmitting conductive layer.
  • the material of the light-transmitting conductive layer includes at least one of graphene, silver, and indium tin oxide.
  • the backlight module further includes a light-shielding glue, a frame and an optical film, the frame is arranged in the conductive back frame, the frame and the conductive back frame connected to form a placement slot, the optical film is arranged in the placement slot; the light-shielding glue is arranged on the frame; the first polarizer is arranged on the light-shielding glue;
  • the outer wall of the frame is concavely provided with a groove
  • the conductive back frame includes a bottom back plate and a side plate, the side plate is arranged on the peripheral side of the bottom back plate; the side plate is arranged in the groove .
  • the conductive member includes a first part and a second part that are connected, the first part is disposed on the light-shielding glue and is connected to the conductive structure layer, and the first part is The two parts are attached to the side panels.
  • the conductive member includes a third part connected to the second part, and the third part is attached and connected to a part of the bottom backplane away from the frame. side.
  • the frame is provided with an opening, and the opening penetrates the light-shielding glue and communicates with the groove;
  • the conductive member includes a connected first part and a second part, the first part is disposed on the light-shielding glue and connected to the conductive structure layer, and the second part is disposed in the opening and extends to the the side plate is attached to the outer wall of the second part.
  • the conductive member is selected from one of a metal sheet, a conductive tape, and a diaphragm with a conductive material.
  • the first polarizer further includes a second base layer and a second adhesive layer that are sequentially stacked on the polarizing layer, the second adhesive layer and the liquid crystal box connected.
  • a conductive member is used to electrically connect the first polarizer and the conductive back frame, so that the potential difference between the conductive back frame and the bottom of the display panel is constant to 0, avoiding the formation of capacitance between the conductive back frame and the display panel, thereby reducing or even avoiding the backlight mode.
  • the membrane material inside the group is subject to the risk of mechanical vibration caused by the alternating voltage, preventing the whistle source from being further amplified.
  • FIG. 1 is a schematic side view of a structure of a first embodiment of a liquid crystal display device provided by the present application
  • FIG. 2 is a schematic cross-sectional structural diagram of the liquid crystal display device in FIG. 1 along line MN;
  • FIG. 3 is a schematic structural diagram of a first polarizer of a first embodiment of a liquid crystal display device provided by the present application;
  • FIG. 4 is a schematic cross-sectional structural diagram of a second embodiment of the liquid crystal display device provided by the present application.
  • FIG. 5 is a schematic structural diagram of a first polarizer of a second embodiment of the liquid crystal display device provided by the present application.
  • FIG. 6 is a schematic structural diagram of a light-transmitting conductive layer of a second embodiment of the liquid crystal display device provided by the present application.
  • FIG. 7 is another schematic structural diagram of the light-transmitting conductive layer of the second embodiment of the liquid crystal display device provided by the present application.
  • FIG. 8 is a schematic cross-sectional structural diagram of a third embodiment of the liquid crystal display device provided by the present application.
  • FIG. 9 is a schematic structural diagram of a first polarizer of a third embodiment of the liquid crystal display device provided by the present application.
  • FIG. 10 is a schematic cross-sectional structural diagram of a fourth embodiment of the liquid crystal display device provided by the present application.
  • Embodiments of the present application provide a liquid crystal display device, which will be described in detail below. It should be noted that the description order of the following embodiments is not intended to limit the preferred order of the embodiments.
  • a first embodiment of the present application provides a liquid crystal display device 100 , which includes a backlight module 10 , a display panel 20 , a chip 30 , a conductive member 40 and a flexible circuit board 50 .
  • the backlight module 10 includes a conductive back frame 11 , a frame 12 , a reflection sheet 13 , a light guide plate 14 , an optical film 15 and a light shielding glue 16 .
  • the frame 12 is arranged in the conductive back frame 11 .
  • the frame 12 and the conductive back frame 11 are connected to form a placement slot 10a.
  • the reflection sheet 13 is disposed on the conductive back frame 11 and is located in the placement groove 10a.
  • the light guide plate 14 is disposed on the reflection sheet 13 and is located in the placement groove 10a.
  • the optical film 15 is disposed on the light guide plate 14 and is located in the placement groove 10a.
  • the light-shielding glue 16 is disposed on the frame 12 .
  • the backlight module 10 may also be a direct type backlight. Wherein, the conductive back frame 11 and the frame 12 remain unchanged.
  • the optical film 15 may be a single-layer optical film, or may be formed by laminating a plurality of optical films, such as a first diffusing film, a brightness enhancing film, and a second diffusing film.
  • the display panel 20 includes a first polarizer 21 , a liquid crystal cell 22 and a second polarizer 23 which are stacked in sequence.
  • the first polarizer 21 is disposed on the light-shielding glue 16 .
  • the display panel 20 is disposed on the backlight module 10 .
  • the chip 30 is bound on the display panel 20 .
  • the display panel 20 is electrically connected to the backlight module 10 through the flexible circuit board 50 .
  • the first polarizer 21 of the display panel 20 is electrically connected to the conductive back frame 11 of the backlight module 10 through the conductive member 40 .
  • the first polarizer 21 is disposed on the side of the liquid crystal cell 22 facing the backlight module 10 .
  • the first polarizer 21 includes a conductive structure layer 211 , a first base layer 212 , a polarizing layer 213 , a second base layer 214 and a second adhesive layer 215 , which are sequentially disposed on the backlight module 10 .
  • the second adhesive layer 215 is connected to the liquid crystal cell 22 .
  • the material of the first base layer 212 and the second base layer 214 may be triacetyl cellulose (Triacetyl Cellulose, TAC).
  • the material of the second adhesive layer 215 may be a pressure-sensitive adhesive layer (Pressure Semsitive Adhesive, PSA).
  • the material of the polarizing layer 213 may be polyvinyl alcohol (Polyvinyl alcohol). Alcohol, PVA).
  • the conductive member 40 is electrically connected to the conductive back frame 11 and the conductive structure layer 211 .
  • the conductive member 40 is used to electrically connect the first polarizer 21 and the conductive back frame 11 .
  • the chip 30 is pressed on the array substrate of the display panel 20, and the flexible circuit board 50 is connected to the display panel 20 and the backlight module 10 to form a circuit; the touch and display driver integrated chip sends out a pulse signal to form a whistle call the source.
  • the conductive member 40 Since the conductive member 40 is electrically connected to the first polarizer 21 and the conductive back frame 11, the potential difference between the conductive back frame 11 and the bottom of the display panel 20 is constant to 0, avoiding the formation of capacitance between the conductive back frame 11 and the display panel 20, thereby reducing or even avoiding
  • the film material inside the backlight module 10 is subject to the risk of mechanical vibration caused by the alternating voltage, preventing the whistle source from being further amplified.
  • the conductive member 40 is selected from one of a metal sheet, a conductive tape, and a diaphragm with a conductive material.
  • the metal sheets can be copper foils, alloy foils, aluminum foils or other metal foils.
  • the conductive back frame 11 may be an iron back frame, an alloy back frame or a back frame made of other conductive materials.
  • the conductive structure layer 211 includes a first adhesive layer 21 a and a conductive material 21 b.
  • the conductive material 21b is doped in the first adhesive layer 21a.
  • the material of the first adhesive layer 21 a may be the same as the material of the second adhesive layer 215 .
  • the conductive material 21b is doped in the first adhesive layer 21a, so that the first polarizer 21 has conductivity and the effect of thinning the first polarizer 21 is achieved.
  • the conductive member 40 is connected to the sidewall of the conductive structure layer 211 .
  • the conductive member 40 may also be overlapped on the side of the conductive structure layer 211 facing the backlight module 10 .
  • the conductive material 21b includes at least one of silver, gold and graphene.
  • the conductive material 21b is in a granular shape.
  • the outer wall of the frame 12 is recessed with a groove 12a.
  • the conductive back frame 11 includes a bottom back plate 111 and a side plate 112 .
  • the side plate 112 is provided on the peripheral side of the bottom back plate 111 .
  • the side plate 112 is disposed in the groove 12a.
  • the conductive member 40 includes a first part 41 , a second part 42 and a third part 43 which are connected in sequence.
  • the first portion 41 is disposed on the light shielding glue 16 and connected to the conductive structure layer 211 .
  • the second part 42 is attached to the side plate 112 .
  • the third portion 43 is attached and connected to the side of the bottom backplane 111 away from the frame 12 .
  • Connecting the second part 42 to the side plate 112 and the third part 43 to the bottom backplane 111 increases the connection area between the conductive part 40 and the conductive back frame 11 and improves the stability of the connection between the conductive part 40 and the conductive back frame 11 .
  • the third part 43 can also be saved, that is, the first part 41 can be used to connect the conductive structure layer 211 and the second part 42 can be connected to the side plate 112 , so that the liquid crystal of the first embodiment can be thinned. Display device 100 .
  • the third part 43 can be fixedly connected to the bottom backplane 111; the fixed connection can be screw connection, riveting or crimping.
  • the number of the conductive members 40 is at least one.
  • the length of each conductive member 40 is smaller than the length of the first polarizer 21 .
  • the number of the conductive members 40 is multiple, and the multiple conductive members 40 are arranged at intervals to improve the stability of the electrical connection between the first polarizer 21 and the conductive back frame 11 .
  • the liquid crystal display device 200 of the second embodiment is different from the liquid crystal display device 100 of the first embodiment in that:
  • the conductive structure layer 211 includes a first adhesive layer 21a and a light-transmitting conductive layer 21c that are stacked in sequence.
  • the light-transmitting conductive layer 21c is located between the first adhesive layer 21a and the first base layer 212 .
  • the conductive member 40 is connected to the light-transmitting conductive layer 21c.
  • the material of the light-transmitting conductive layer 21c includes at least one of graphene, silver, indium tin oxide, or other light-transmitting conductive materials.
  • the light-transmitting conductive layer 21c is formed on the first base layer 212, which improves the overall conductivity of the first polarizer 21 on the one hand, and increases the connection area with the conductive member 40 on the other hand, and further Improve connection stability.
  • the light-transmitting conductive layer 21c may cover the entire surface of the first base layer 212, or may be arranged in a pattern.
  • the light-transmitting conductive layer 21c is patterned to improve the transmittance of light passing through the light-transmitting conductive layer 21c.
  • the light-transmitting conductive layer 21c includes a first branch 21c1, a second branch 21c2 and a trunk portion 21c3. Both the first branch 21c1 and the second branch 21c2 are connected to the same side of the trunk portion 21c3.
  • the trunk portion 21c3 extends along the first direction Y.
  • the first branch 21c1 extends along the second direction X outward from the main stem portion 21c3.
  • the second branch 21c2 extends along the third direction Z outward from the main stem portion 21c3.
  • the first direction Y, the second direction X and the third direction Z are all in the same plane.
  • the first direction Y, the second direction X and the third direction Z are set to intersect each other; or the first direction Y is parallel to the second direction X, and the second direction X intersects the third direction Z, as shown in FIG. 7 .
  • the liquid crystal display device 200 of the second embodiment is described by taking the first direction Y, the second direction X and the third direction Z intersecting each other as an example, but it is not limited thereto.
  • the plurality of first branches 21c1 and the plurality of second branches 21c2 intersect to form a grid structure, which saves the material of the light-transmitting conductive layer 21c on the one hand, and facilitates the connection of the first adhesive layer 21a to the first base layer 212 on the other hand. Risk of separation of the photoconductive layer 21c.
  • the second direction X is perpendicular to the third direction Z.
  • the included angle ⁇ between the first direction Y and the second direction X is an obtuse angle, such as 105 degrees, 120 degrees, 135 degrees, 150 degrees or 165 degrees.
  • the width D1 of the trunk portion 21c3 is larger than the width of the first branch 21c1 and the width of the second branch 21c2 to improve the stability of the connection between the conductive member 40 and the light-transmitting conductive layer 21c.
  • the first branch 21c1 and the second branch 21c2 are both disposed on the periphery of the pixels of the liquid crystal display device 200 to further improve the light transmittance.
  • the first branch 21c1 may be a non-transparent conductive material, such as a single-layer metal, a stack structure of multiple layers of metal, or a stack structure of pure metal layers and alloy layers.
  • the liquid crystal display device 300 of the third embodiment is different from the liquid crystal display device 200 of the second embodiment in that:
  • the conductive structure layer 211 includes a first adhesive layer 21a, a light-transmitting conductive layer 21c and an intermediate adhesive layer 21d which are stacked in sequence.
  • the intermediate adhesive layer 21d is connected to the first base layer 212 .
  • the conductive member 40 is connected to the light-transmitting conductive layer 21c.
  • an intermediate adhesive layer 21d is used to bond the light-transmitting conductive layer 21c and the first base layer 212 to reduce the risk of separation between the light-transmitting conductive layer 21c and the first base layer 212 .
  • the fourth embodiment will be described based on the first embodiment, but not limited thereto.
  • the liquid crystal display device 400 of the fourth embodiment is different from the liquid crystal display device 100 of the first embodiment in that:
  • the frame 12 is provided with an opening 12b.
  • the opening 12b penetrates through the light-shielding glue 16 and communicates with the groove 12a.
  • the conductive member 40 includes a first portion 41 and a second portion 42 that are connected.
  • the first portion 41 is disposed on the light shielding glue 16 and connected to the conductive structure layer 211 .
  • the second portion 42 is disposed within the opening 12b and extends into the groove 12a.
  • the side plate 112 is attached to the outer wall of the second part 42 .
  • the second part 42 is arranged in the groove 12a, and the side plate 112 is used to fasten the second part 42 to connect with the second part 42, which not only saves the installation of the second part 42 space, and the second part 42 is protected.
  • the installation process of the conductive member 40 may be to first pass the second part 42 through the opening 12b and set it in the groove 12a; then, assemble the frame 12 and the conductive back frame 11, so that the side plate 112 is set in the groove 12a Inside and fasten the second part 42; then install the reflective sheet 13, the light guide plate 14 and the optical film 15 on the conductive back frame 11; is arranged on the frame 12; secondly, the liquid crystal cell 22 with the first polarizer 21 and the second polarizer 23 attached is arranged on the light-shielding glue 16, so that the conductive structure layer 211 is overlapped on the light-shielding glue 16; finally, the The first portion 41 is electrically connected to the conductive structure layer 211 .
  • a conductive member is used to electrically connect the first polarizer and the conductive back frame, so that the potential difference between the conductive back frame and the bottom of the display panel is constant to 0, avoiding the formation of capacitance between the conductive back frame and the display panel, thereby reducing or even avoiding the backlight mode.
  • the membrane material inside the group is subject to the risk of mechanical vibration caused by the alternating voltage, preventing the whistle source from being further amplified.

Abstract

一种液晶显示装置，包括显示面板（20）和背光模组（10）。背光模组（10）包括导电背框（11）；显示面板（20）包括液晶盒（22）和第一偏光片（21）。第一偏光片（21）设置在液晶盒（22）面向背光模组（10）的一侧，第一偏光片（21）包括依次设置在背光模组（10）上的导电结构层（211）、第一基层（212）和偏光层（213）。导电部件（40）电连接于导电背框（11）和导电结构层（211），避免导电背框（11）和显示面板（20）形成电容，降低背光模组（10）内部的膜材受到交变电压而发生机械振动产生啸叫的风险。

Description

液晶显示装置 技术领域
本申请涉及显示技术领域，具体涉及一种液晶显示装置。
 背景技术
手机啸叫问题近年来成为困扰显示屏幕行业的一大难题。所谓啸叫，是指当人耳朵靠近手机屏幕时，会持续听见类似于电流的呲呲声，声音大小随不同人对低频/高频声音敏感程度而不同，因此，手机啸叫影响用户体验。
 技术问题
本申请实施例提供一种液晶显示装置，可以降低液晶显示装置发生啸叫的风险。
 技术解决方案
本申请实施例提供一种液晶显示装置，其包括：
背光模组，所述背光模组包括导电背框；
显示面板，所述显示面板设置在所述背光模组上，所述显示面板包括液晶盒和第一偏光片，所述第一偏光片设置在所述液晶盒面向所述背光模组的一侧；所述第一偏光片包括依次设置在所述背光模组上的导电结构层、第一基层和偏光层；以及
导电部件，所述导电部件电连接于所述导电背框和所述导电结构层。
可选的，在本申请的一些实施例中，所述导电结构层包括第一胶层和导电材料，所述导电材料掺杂在所述第一胶层中。
可选的，在本申请的一些实施例中，所述导电材料包括银、金和石墨烯中的至少一种。
可选的，在本申请的一些实施例中，所述导电结构层包括依次层叠设置的第一胶层和透光导电层，所述透光导电层形成在所述第一基层面向所述第一胶层的一面上；所述导电部件与所述透光导电层相连。
可选的，在本申请的一些实施例中，所述透光导电层包括所述第一分支、第二分支和主干部分，所述第一分支和所述第二分支均连接于主干部分的同一侧；
所述主干部分沿着第一方向延伸，所述第一分支自所述主干部分向外沿着第二方向延伸，所述第二分支自所述主干部分向外沿着第三方向延伸，其中所述第一方向、所述第二方向和所述第三方向均为同一平面内。
可选的，在本申请的一些实施例中，所述第一方向、所述第二方向和所述第三方向两两相交设置。
可选的，在本申请的一些实施例中，所述第一方向平行于所述第二方向，所述第二方向与所述第三方向Z相交。
可选的，在本申请的一些实施例中，所述主干部分的宽度大于所述第一分支的宽度和所述第二分支的宽度。
可选的，在本申请的一些实施例中，所述第一分支、所述第二分支均设置在所述液晶显示装置的像素的外周。
可选的，在本申请的一些实施例中，所述导电结构层包括依次层叠设置的第一胶层、透光导电层和中间胶层，所述中间胶层与所述第一基层相连；所述导电部件与所述透光导电层相连。
可选的，在本申请的一些实施例中，所述透光导电层的材料包括石墨烯、银、氧化铟锡中的至少一种。
可选的，在本申请的一些实施例中，所述背光模组还包括遮光胶、边框和光学膜片，所述边框设置在所述导电背框内，所述边框和所述导电背框连接形成一放置槽，所述光学膜片设置在所述放置槽内；所述遮光胶设置在所述边框上；所述第一偏光片设置在所述遮光胶上；
所述边框的外壁凹设有凹槽，所述导电背框包括底背板和侧板，所述侧板设置在所述底背板的周侧；所述侧板设置在所述凹槽内。
可选的，在本申请的一些实施例中，所述导电部件包括相连的第一部分和第二部分，所述第一部分设置在所述遮光胶上且与所述导电结构层相连，所述第二部分贴合连接在所述侧板上。
可选的，在本申请的一些实施例中，所述导电部件包括与所述第二部分相连的第三部分，所述第三部分贴合连接在所述底背板远离所述边框的一侧。
可选的，在本申请的一些实施例中，所述边框上设置有开口，所述开口贯穿所述遮光胶且连通所述凹槽；
所述导电部件包括相连的第一部分和第二部分，所述第一部分设置在所述遮光胶上且与所述导电结构层相连，所述第二部分设置在所述开口内，并延伸至所述凹槽内；所述侧板贴合连接于所述第二部分的外壁。
可选的，在本申请的一些实施例中，所述导电部件选自金属片、导电胶带和具有导电材料的膜片中的一种。
可选的，在本申请的一些实施例中，所述第一偏光片还包括依次层叠设置在所述偏光层上的第二基层和第二胶层，所述第二胶层与所述液晶盒相连。
 有益效果
本申请实施例采用导电部件将第一偏光片和导电背框电连接，使得导电背框和显示面板的底部的电势差恒定为0，避免导电背框和显示面板形成电容，从而降低甚至避免背光模组内部的膜材受到交变电压而发生机械振动的风险，阻止啸叫源被进一步放大。
 附图说明
为了更清楚地说明本申请实施例中的技术方案，下面将对实施例描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本申请的一些实施例，对于本领域技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1是本申请所提供的液晶显示装置的第一实施例的侧视结构示意图；
图2是图1中的液晶显示装置沿MN线的剖视结构示意图；
图3是本申请所提供的液晶显示装置的第一实施例的第一偏光片的结构示意图；
图4是本申请所提供的液晶显示装置的第二实施例的剖视结构示意图；
图5是本申请所提供的液晶显示装置的第二实施例的第一偏光片的结构示意图；
图6是本申请所提供的液晶显示装置的第二实施例的透光导电层的结构示意图；
图7是本申请所提供的液晶显示装置的第二实施例的透光导电层的另一结构示意图；
图8是本申请所提供的液晶显示装置的第三实施例的剖视结构示意图；
图9是本申请所提供的液晶显示装置的第三实施例的第一偏光片的结构示意图；
图10是本申请所提供的液晶显示装置的第四实施例的剖视结构示意图。
 本发明的实施方式
下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本申请一部分实施例，而不是全部的实施例。基于本申请中的实施例，本领域技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。此外，应当理解的是，此处所描述的具体实施方式仅用于说明和解释本申请，并不用于限制本申请。在本申请中，在未作相反说明的情况下，使用的方位词如“上”和“下”通常是指装置实际使用或工作状态下的上和下，具体为附图中的图面方向；而“内”和“外”则是针对装置的轮廓而言的。
本申请实施例提供一种液晶显示装置，下文进行详细说明。需说明的是，以下实施例的描述顺序不作为对实施例优选顺序的限定。
请参照图1至图2，本申请第一实施例提供一种液晶显示装置100，其包括背光模组10、显示面板20、芯片30、导电部件40和柔性电路板50。
背光模组10包括导电背框11、边框12、反射片13、导光板14、光学膜片15和遮光胶16。边框12设置在导电背框11内。边框12和导电背框11连接形成一放置槽10a。反射片13设置在导电背框11上，且位于放置槽10a内。导光板14设置在反射片13上，且位于放置槽10a内。光学膜片15设置在导光板14上，且位于放置槽10a内。遮光胶16设置在边框12上。
在一些实施例中，背光模组10也可以是直下式背光。其中，导电背框11和边框12保持不变。
光学膜片15可以是单层光学膜，也可以是多层光学膜层叠形成，比如由第一扩散膜、增亮膜和第二扩散膜层叠形成。
显示面板20包括依次层叠设置的第一偏光片21、液晶盒22和第二偏光片23。第一偏光片21设置在遮光胶16上。
显示面板20设置在背光模组10上。芯片30绑定在显示面板20上。显示面板20通过柔性电路板50电性连接于背光模组10。显示面板20的第一偏光片21通过导电部件40电连接于背光模组10的导电背框11。
具体的，第一偏光片21设置在液晶盒22面向背光模组10的一侧。请参照图3，第一偏光片21包括依次设置在背光模组10上的导电结构层211、第一基层212、偏光层213、第二基层214和第二胶层215。第二胶层215与液晶盒22相连。
其中，第一基层212和第二基层214的材料可以是三醋酸纤维素（Triacetyl Cellulose，TAC）。第二胶层215的材料可以是压敏粘合剂层（Pressure Semsitive Adhesive，PSA）。偏光层213的材料可以是聚乙烯醇（Polyvinyl Alcohol，PVA）。
导电部件40电连接于导电背框11和导电结构层211。
本申请第一实施例采用导电部件40将第一偏光片21和导电背框11电连接。在实现触控功能时，芯片30压接于显示面板20的阵列基板上，柔性电路板50连接显示面板20与背光模组10，形成回路；触控与显示驱动器集成芯片发出脉冲信号，形成啸叫源。由于导电部件40电连接第一偏光片21和导电背框11，使得导电背框11和显示面板20的底部的电势差恒定为0，避免导电背框11和显示面板20形成电容，从而降低甚至避免背光模组10内部的膜材受到交变电压而发生机械振动的风险，阻止啸叫源被进一步放大。
可选的，导电部件40选自金属片、导电胶带和具有导电材料的膜片中的一种。金属片可以是铜箔片、合金箔片、铝箔片或其他金属箔片。
可选的，导电背框11可以是铁背框、合金背框或其他导电材料制成的背框。
在第一实施例的液晶显示装置100中，请参照图3，导电结构层211包括第一胶层21a和导电材料21b。导电材料21b掺杂在第一胶层21a中。
第一胶层21a的材料可与第二胶层215的材料相同。
在第一实施例的液晶显示装置100中，将导电材料21b掺杂在第一胶层21a中，既使得第一偏光片21具有导电性，又可以达到薄化第一偏光片21的效果。
可选的，导电部件40连接于导电结构层211的侧壁。在一些实施例中，导电部件40也可搭接在导电结构层211面向背光模组10的一侧。
可选的，导电材料21b包括银、金和石墨烯中的至少一种。在第一实施例的液晶显示装置100中，导电材料21b呈颗粒状。
在第一实施例的液晶显示装置100中，边框12的外壁凹设有凹槽12a。导电背框11包括底背板111和侧板112。侧板112设置在底背板111的周侧。侧板112设置在凹槽12a内。
导电部件40包括依次相连的第一部分41、第二部分42和第三部分43。第一部分41设置在遮光胶16上且与导电结构层211相连。第二部分42贴合连接在侧板112上。第三部分43贴合连接在底背板111远离边框12的一侧。
将第二部分42连接侧板112以及第三部分43连接于底背板111，增大导电部件40和导电背框11的连接面积，提高了导电部件40和导电背框11连接的稳定性。
在一些实施例中，也可节省第三部分43，也即采用第一部分41连接导电结构层211，以及第二部分42连接侧板112即可，从而得到可薄化本第一实施例的液晶显示装置100。
可选的，第三部分43与底背板111可以固定连接；固定连接的方式可以是螺纹连接、铆接或压接。
在第一实施例的液晶显示装置100中，导电部件40的数量为至少一个。每一导电部件40的长度小于第一偏光片21的长度。
在一些实施例中，导电部件40的数量为多个，多个导电部件40间隔设置，提高第一偏光片21和导电背框11电连接的稳定性。
请参照图4和图5，在第一实施例的液晶显示装置100的基础上，第二实施例的液晶显示装置200与第一实施例的液晶显示装置100的不同之处在于：
导电结构层211包括依次层叠设置的第一胶层21a和透光导电层21c。透光导电层21c位于第一胶层21a和第一基层212之间。导电部件40与透光导电层21c相连。
可选的，透光导电层21c的材料包括石墨烯、银、氧化铟锡中的至少一种，或其他透光的导电材料。
第二实施例的液晶显示装置200将透光导电层21c形成在第一基层212上，一方面提高了第一偏光片21整体的导电性能，另一方面提高与导电部件40的连接面积，进而提高连接的稳定性。
在第二实施例的液晶显示装置200中，透光导电层21c可以整面覆盖第一基层212，也可以是图案化设置。图案化透光导电层21c以提高光穿过透光导电层21c的透过率。
请参照图6，透光导电层21c包括第一分支21c1、第二分支21c2和主干部分21c3。第一分支21c1和第二分支21c2均连接于主干部分21c3的同一侧。
主干部分21c3沿着第一方向Y延伸。第一分支21c1自主干部分21c3向外沿着第二方向X延伸。第二分支21c2自主干部分21c3向外沿着第三方向Z延伸。其中第一方向Y、第二方向X和第三方向Z均为同一平面内。
第一方向Y、第二方向X和第三方向Z两两相交设置；或者第一方向Y平行于第二方向X，第二方向X与第三方向Z相交，如图7所示。第二实施例的液晶显示装置200以第一方向Y、第二方向X和第三方向Z两两相交设置为例进行说明，但不限于此。
其中，多个第一分支21c1和多个第二分支21c2交叉形成网格结构，一方面节省了透光导电层21c的材料，另一方面便于第一胶层21a连接第一基层212，降低透光导电层21c分离的风险。
可选的，第二方向X垂直于第三方向Z。第一方向Y与第二方向X的夹角α为钝角，比如105度、120度、135度、150度或165度。
另外，主干部分21c3的宽度D1大于第一分支21c1的宽度和第二分支21c2的宽度，以提高导电部件40和透光导电层21c的连接的稳定性。
可选的，第一分支21c1、第二分支21c2均设置在液晶显示装置200的像素的外周，进一步达到提高透光率的效果，且在该结构下，在一实施例中，第一分支21c1、第二分支21c2的材料可以是非透明的导电材料，比如单层金属、或多层金属的堆叠结构、亦或者是纯金属层和合金层的堆叠结构。
请参照图8和图9，在第二实施例的液晶显示装置200的基础上，第三实施例的液晶显示装置300与第二实施例的液晶显示装置200的不同之处在于：
导电结构层211包括依次层叠设置的第一胶层21a、透光导电层21c和中间胶层21d。中间胶层21d与第一基层212相连。导电部件40与透光导电层21c相连。
第三实施例采用中间胶层21d粘结透光导电层21c和第一基层212，降低透光导电层21c和第一基层212分离的风险。
请参照图10，在第一至第三的任意实施例的液晶显示装置（100、200和300）的基础上，第四实施例以第一实施例作为基础进行说明，但不限于此。第四实施例的液晶显示装置400与第一实施例的液晶显示装置100的不同之处在于：
边框12上设置有开口12b。开口12b贯穿遮光胶16且连通凹槽12a。导电部件40包括相连的第一部分41和第二部分42。第一部分41设置在遮光胶16上且与导电结构层211相连。第二部分42设置在开口12b内，并延伸至凹槽12a内。侧板112贴合连接于第二部分42的外壁。
第四实施例的液晶显示装置400将第二部分42设置在凹槽12a内，并采用侧板112扣紧第二部分42的方式与第二部分42连接，不但节省了第二部分42的安装空间，而且保护了第二部分42。
其中，导电部件40的安装过程可以是先将第二部分42穿过开口12b并设置在凹槽12a内；随后，将边框12和导电背框11进行组装，使侧板112设置在凹槽12a内并扣紧第二部分42；接着在导电背框11上安装反射片13、导光板14和光学膜片15；然后，将第一部分41穿过遮光胶16的开孔，且将遮光胶16设置在边框12上；其次，将贴合了第一偏光片21和第二偏光片23的液晶盒22设置在遮光胶16上，使得导电结构层211搭接在遮光胶16上；最后，将第一部分41与导电结构层211电连接。
本申请实施例采用导电部件将第一偏光片和导电背框电连接，使得导电背框和显示面板的底部的电势差恒定为0，避免导电背框和显示面板形成电容，从而降低甚至避免背光模组内部的膜材受到交变电压而发生机械振动的风险，阻止啸叫源被进一步放大。
以上对本申请实施例所提供的一种液晶显示装置进行了详细介绍，本文中应用了具体个例对本申请的原理及实施方式进行了阐述，以上实施例的说明只是用于帮助理解本申请的方法及其核心思想；同时，对于本领域的技术人员，依据本申请的思想，在具体实施方式及应用范围上均会有改变之处，综上所述，本说明书内容不应理解为对本申请的限制。

Claims (20)

  1. 一种液晶显示装置，其包括：
    背光模组，所述背光模组包括导电背框；
    显示面板，所述显示面板设置在所述背光模组上，所述显示面板包括液晶盒和第一偏光片，所述第一偏光片设置在所述液晶盒面向所述背光模组的一侧；所述第一偏光片包括依次设置在所述背光模组上的导电结构层、第一基层和偏光层；以及
    导电部件，所述导电部件电连接于所述导电背框和所述导电结构层。
  2. 根据权利要求1所述的液晶显示装置，其中，所述导电结构层包括第一胶层和导电材料，所述导电材料掺杂在所述第一胶层中。
  3. 根据权利要求2所述的液晶显示装置，其中，所述导电材料包括银、金和石墨烯中的至少一种。
  4. 根据权利要求1所述的液晶显示装置，其中，所述导电结构层包括依次层叠设置的第一胶层和透光导电层，所述透光导电层形成在所述第一基层面向所述第一胶层的一面上；所述导电部件与所述透光导电层相连。
  5. 根据权利要求4所述的液晶显示装置，其中，所述透光导电层包括所述第一分支、第二分支和主干部分，所述第一分支和所述第二分支均连接于主干部分的同一侧；
    所述主干部分沿着第一方向延伸，所述第一分支自所述主干部分向外沿着第二方向延伸，所述第二分支自所述主干部分向外沿着第三方向延伸，其中所述第一方向、所述第二方向和所述第三方向均为同一平面内。
  6. 根据权利要求5所述的液晶显示装置，其中，所述第一方向、所述第二方向和所述第三方向两两相交设置。
  7. 根据权利要求5所述的液晶显示装置，其中，所述第一方向平行于所述第二方向，所述第二方向与所述第三方向Z相交。
  8. 根据权利要求5所述的液晶显示装置，其中，所述主干部分的宽度大于所述第一分支的宽度和所述第二分支的宽度。
  9. 根据权利要求5所述的液晶显示装置，其中，所述第一分支、所述第二分支均设置在所述液晶显示装置的像素的外周。
  10. 根据权利要求1所述的液晶显示装置，其中，所述导电结构层包括依次层叠设置的第一胶层、透光导电层和中间胶层，所述中间胶层与所述第一基层相连；所述导电部件与所述透光导电层相连。
  11. 根据权利要求10所述的液晶显示装置，其中，所述透光导电层包括所述第一分支、第二分支和主干部分，所述第一分支和所述第二分支均连接于主干部分的同一侧；
    所述主干部分沿着第一方向延伸，所述第一分支自所述主干部分向外沿着第二方向延伸，所述第二分支自所述主干部分向外沿着第三方向延伸，其中所述第一方向、所述第二方向和所述第三方向均为同一平面内；
    所述第一方向、所述第二方向和所述第三方向两两相交设置。
  12. 根据权利要求11所述的液晶显示装置，其中，所述主干部分的宽度大于所述第一分支的宽度和所述第二分支的宽度。
  13. 根据权利要求11所述的液晶显示装置，其中，所述第一分支、所述第二分支均设置在所述液晶显示装置的像素的外周。
  14. 根据权利要求4所述的液晶显示装置，其中，所述透光导电层的材料包括石墨烯、银、氧化铟锡中的至少一种。
  15. 根据权利要求1所述的液晶显示装置，其中，所述背光模组还包括遮光胶、边框和光学膜片，所述边框设置在所述导电背框内，所述边框和所述导电背框连接形成一放置槽，所述光学膜片设置在所述放置槽内；所述遮光胶设置在所述边框上；所述第一偏光片设置在所述遮光胶上；
    所述边框的外壁凹设有凹槽，所述导电背框包括底背板和侧板，所述侧板设置在所述底背板的周侧；所述侧板设置在所述凹槽内。
  16. 根据权利要求15所述的液晶显示装置，其中，所述导电部件包括相连的第一部分和第二部分，所述第一部分设置在所述遮光胶上且与所述导电结构层相连，所述第二部分贴合连接在所述侧板上。
  17. 根据权利要求16所述的液晶显示装置，其中，所述导电部件包括与所述第二部分相连的第三部分，所述第三部分贴合连接在所述底背板远离所述边框的一侧。
  18. 根据权利要求15所述的液晶显示装置，其中，所述边框上设置有开口，所述开口贯穿所述遮光胶且连通所述凹槽；
    所述导电部件包括相连的第一部分和第二部分，所述第一部分设置在所述遮光胶上且与所述导电结构层相连，所述第二部分设置在所述开口内，并延伸至所述凹槽内；所述侧板贴合连接于所述第二部分的外壁。
  19. 根据权利要求1所述液晶显示装置，其中，所述导电部件选自金属片、导电胶带和具有导电材料的膜片中的一种。
  20. 根据权利要求1所述的液晶显示装置，其中，所述第一偏光片还包括依次层叠设置在所述偏光层上的第二基层和第二胶层，所述第二胶层与所述液晶盒相连。
PCT/CN2021/080785 2021-03-01 2021-03-15 液晶显示装置 WO2022183525A1 (zh)

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