WO2016155141A1 - 一种偏光片、其制作方法、液晶显示面板及显示装置 - Google Patents

一种偏光片、其制作方法、液晶显示面板及显示装置 Download PDF

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Publication number
WO2016155141A1
WO2016155141A1 PCT/CN2015/083758 CN2015083758W WO2016155141A1 WO 2016155141 A1 WO2016155141 A1 WO 2016155141A1 CN 2015083758 W CN2015083758 W CN 2015083758W WO 2016155141 A1 WO2016155141 A1 WO 2016155141A1
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Prior art keywords
liquid crystal
display panel
crystal display
light shielding
thin film
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PCT/CN2015/083758
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English (en)
French (fr)
Inventor
房凯迪
祝政委
Original Assignee
京东方科技集团股份有限公司
合肥京东方光电科技有限公司
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Priority to US14/912,906 priority Critical patent/US10203544B2/en
Publication of WO2016155141A1 publication Critical patent/WO2016155141A1/zh

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    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—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
    • 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
    • G02F1/133512—Light shielding layers, e.g. black matrix
    • 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
    • G02F1/136—Liquid crystal cells structurally associated with a semi-conducting layer or substrate, e.g. cells forming part of an integrated circuit
    • G02F1/1362—Active matrix addressed cells
    • G02F1/136209—Light shielding layers, e.g. black matrix, incorporated in the active matrix substrate, e.g. structurally associated with the switching element
    • 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
    • G02F1/136—Liquid crystal cells structurally associated with a semi-conducting layer or substrate, e.g. cells forming part of an integrated circuit
    • G02F1/1362—Active matrix addressed cells
    • G02F1/136286—Wiring, e.g. gate line, drain line
    • 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
    • G02F1/136—Liquid crystal cells structurally associated with a semi-conducting layer or substrate, e.g. cells forming part of an integrated circuit
    • G02F1/1362—Active matrix addressed cells
    • G02F1/1368—Active matrix addressed cells in which the switching element is a three-electrode device
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/30—Polarising elements
    • G02B5/3025—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state
    • G02B5/3033—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state in the form of a thin sheet or foil, e.g. Polaroid
    • 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
    • G02F1/13356—Structural association of cells with optical devices, e.g. polarisers or reflectors characterised by the placement of the optical elements
    • G02F1/133562—Structural association of cells with optical devices, e.g. polarisers or reflectors characterised by the placement of the optical elements on the viewer 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
    • 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
    • G02F1/13356—Structural association of cells with optical devices, e.g. polarisers or reflectors characterised by the placement of the optical elements
    • G02F1/133567—Structural association of cells with optical devices, e.g. polarisers or reflectors characterised by the placement of the optical elements on the back 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
    • 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

Definitions

  • the present invention relates to the field of display technologies, and in particular, to a polarizer, a method for fabricating the same, a liquid crystal display panel, and a display device.
  • LCDs liquid crystal displays
  • the liquid crystal display generally includes a liquid crystal display panel and a backlight module that provides a light source for the liquid crystal display panel.
  • the liquid crystal display panel includes a lower polarizer, an array substrate, a liquid crystal layer, an opposite substrate and an upper polarizer in order from bottom to top; The light emitted by the module is directed to the array substrate in the liquid crystal display panel through the lower polarizer.
  • a thin film transistor (TFT) and a pixel electrode are generally disposed on a side of the array substrate facing the liquid crystal layer, and light emitted by the backlight module is irradiated onto the array substrate through the lower polarizer.
  • the TFT on the array substrate generates a leakage current after being irradiated by the backlight.
  • the gate electrode in the bottom gate type TFT is located below the active layer, and the gate electrode can block the TFT channel from being irradiated by the backlight in principle; however, it is difficult to ensure all TFTs in the actual fabrication process.
  • the channel can be completely blocked by the gate electrode, and the channel of the TFT at different positions on the array substrate is different by the backlight; thus, the TFTs at different positions on the array substrate generate different leakage currents, thereby causing the array
  • the voltages of the pixel electrodes at different positions on the substrate are different, which may cause defects such as flicker and crosstalk on the liquid crystal display, and affect the display quality of the liquid crystal display.
  • the embodiments of the present invention provide a polarizer, a method for fabricating the same, a liquid crystal display panel, and a display device, which are used to solve the problem of flicker, crosstalk, etc. caused by backlight illumination of the thin film transistor in the prior art. problem.
  • an embodiment of the present invention provides a polarizer for a liquid crystal display panel, comprising: a polarizing film; and a light shielding layer on the polarizing film;
  • the light shielding layer includes a light shielding portion for covering at least the thin film crystal in the liquid crystal display panel The channel of the body tube.
  • the light shielding layer includes a plurality of light shielding portions, and the plurality of light shielding portions correspond to the thin film transistors in the liquid crystal display panel. ;
  • each of the light shielding portions is identical to the shape of the corresponding thin film transistor, and the size of each of the light shielding portions is greater than or equal to the size of the corresponding thin film transistor.
  • the light shielding portion has the same shape, the same size, and a position as the black matrix in the liquid crystal display panel.
  • the material of the light shielding portion is a material forming a black matrix in the liquid crystal display panel.
  • the embodiment of the present invention further provides a liquid crystal display panel, comprising: a liquid crystal cell, an upper polarizer, and a lower polarizer; wherein the liquid crystal cell is disposed between the upper polarizer and the lower polarizer;
  • the polarizer is provided by the embodiment of the present invention.
  • the liquid crystal cell includes: an opposite opposite substrate and an array substrate, and the opposite substrate and the a liquid crystal layer between the array substrates; wherein a side of the array substrate facing the liquid crystal layer is provided with a thin film transistor;
  • the thin film transistor includes: a gate electrode and an active layer insulated from each other; and a source electrode and a drain electrode electrically connected to the active layer, respectively; wherein the source electrode and the drain electrode are both located Above the active layer; the gate electrode is located below the active layer.
  • the liquid crystal cell includes: an opposite opposite substrate and an array substrate, and the opposite substrate and the a liquid crystal layer between the array substrates; wherein a side of the array substrate facing the liquid crystal layer is provided with a thin film transistor;
  • the thin film transistor includes: a gate electrode and an active layer insulated from each other; and a source electrode and a drain electrode electrically connected to the active layer, respectively; wherein the source electrode and the drain electrode are both located Above the active layer; the gate electrode is above the source electrode and the drain electrode.
  • the embodiment of the invention further provides a display device, comprising: the liquid crystal display panel and the backlight module provided by the embodiment of the invention; wherein the lower polarizer in the liquid crystal display panel is adjacent to the backlight module.
  • the embodiment of the present invention further provides a method for fabricating a polarizer.
  • the polarizer is applied to a liquid crystal display panel, and includes:
  • the light shielding layer includes a light shielding portion for covering at least a channel of the thin film transistor in the liquid crystal display panel.
  • forming the light shielding layer includes:
  • each of the light shielding portions has a shape conforming to a shape of a corresponding thin film transistor, each of the light shielding portions The size is greater than or equal to the size of the corresponding thin film transistor.
  • forming the light shielding layer includes:
  • a pattern of a light-shielding portion corresponding to the shape of the black matrix in the liquid crystal display panel and having the same size and position is formed by a patterning process.
  • forming the light shielding layer includes:
  • the light shielding portion is formed using a material forming a black matrix in the liquid crystal display panel.
  • the polarizer comprises: a polarizing film and a light shielding layer on the polarizing film; wherein the light shielding layer comprises a light shielding portion for at least Covering a channel of the thin film transistor in the liquid crystal display panel; when the polarizer is used as a lower polarizer in the liquid crystal display panel, adding a light shielding layer on the polarizer to block a channel of the thin film transistor in the liquid crystal display panel.
  • the backlight of the thin film transistor is prevented from being irradiated by the backlight to cause leakage current of the thin film transistor, thereby preventing the liquid crystal display panel from causing defects such as flicker and crosstalk, thereby affecting the display quality of the liquid crystal display panel.
  • FIG. 1 to 3 are schematic structural views of a polarizer according to an embodiment of the present invention.
  • FIG. 4 is a schematic structural view of an array substrate in a conventional liquid crystal display panel
  • FIG. 5 and FIG. 6 are schematic structural diagrams of a liquid crystal display panel according to an embodiment of the present invention.
  • FIG. 7 is a flowchart of a method for fabricating a polarizer according to an embodiment of the present invention.
  • the embodiment of the present invention provides a polarizer for use in a liquid crystal display panel, as shown in FIG. 1 to FIG. 3, comprising: a polarizing film 1; further comprising: a light shielding layer 2 on the polarizing film 1;
  • the light shielding layer 2 includes a light shielding portion 3 for covering at least a channel of the thin film transistor in the liquid crystal display panel.
  • a light shielding layer for covering at least a channel of the thin film transistor in the liquid crystal display panel is added to the polarizer, and thus the polarizer is used as a lower polarizer in the liquid crystal display panel.
  • the added light shielding layer on the polarizer can block the channel of the thin film transistor in the liquid crystal display panel from being irradiated by the backlight, thereby avoiding the channel of the thin film transistor.
  • the thin film transistor generates a leakage current by being irradiated by the backlight, thereby preventing the liquid crystal display panel from causing defects such as flicker, crosstalk, etc., and affecting the display quality of the liquid crystal display panel.
  • each of the gate lines 10 and each The thin film transistors 12 are disposed at intersections of the strip data lines 11, and each of the thin film transistors 12 includes: a gate electrode 121 and an active layer 122 insulated from each other, and a source electrode 123 and a drain electrode electrically connected to the active layer 122, respectively. 124; a channel is formed between the source electrode 123 and the drain electrode 124 and facing the gate electrode 121.
  • the thin film transistor shown in FIG. 4 is only a schematic structural view of the conventional thin film transistor.
  • the structure of the conventional thin film transistor is not limited to the structure shown in FIG. 4, which is not limited herein.
  • the pattern of the light shielding portion is used to cover at least a channel of the thin film transistor in the liquid crystal display panel.
  • the pattern of the light shielding portion 3 in the light shielding layer 2 may only block the region where the channel of the thin film transistor in the corresponding liquid crystal display panel is located, that is, the pattern of the light shielding portion and the channel of the thin film transistor.
  • the pattern of the light shielding portion 3 in the light shielding layer 2 can block the channel of the thin film transistor without affecting the aperture ratio of the liquid crystal display panel.
  • the area other than the area and the channel is not limited herein.
  • the light shielding layer 2 may include more a plurality of light shielding portions, wherein the plurality of light shielding portions are in one-to-one correspondence with the thin film transistors in the liquid crystal display panel; each of the light shielding portions 3 has a shape conforming to a shape of the corresponding thin film transistor, and each of the light shielding portions 3 may have a size equal to a corresponding film.
  • the size of the transistor, or the size of each of the light shielding portions 3 may be larger than the size of the corresponding thin film transistor, and it is only required to ensure that the light shielding portions 3 are not affected by the aperture ratio of the liquid crystal display panel, which is not limited herein; That is, the pattern of the light shielding portion 3 in the light shielding layer 2 can block the region where the thin film transistor is located, so that the edge of the channel of the thin film transistor can be prevented from leaking light, so that the pattern of the light shielding portion 3 in the light shielding layer 2 blocks the channel of the thin film transistor from being backlighted.
  • the effect of the illumination is better, so that the channel of the thin film transistor can be further protected from the backlight, and the liquid crystal can be further ensured.
  • the display panel does not cause defects such as flicker, crosstalk, etc., which affect the display quality of the liquid crystal display panel.
  • the light shielding portion 3 and the liquid crystal may be
  • the black matrix in the display panel has the same shape, the same size, and the corresponding position, that is, the orthographic projection of the light shielding portion 3 on the polarizing film 1 coincides with the orthographic projection of the black matrix in the liquid crystal display panel at the polarizing film 1.
  • the light shielding layer 2 can not only block the channel of the thin film transistor, but also prevent the channel of the thin film transistor from being directly exposed to the backlight to generate leakage current; and the light shielding layer 2 can also block the data line and prevent the backlight from being reflected after being irradiated to the data line.
  • Light is incident on the channel of the thin film transistor to cause leakage current to the thin film transistor, so that defects such as flicker and crosstalk existing in the liquid crystal display panel can be further improved.
  • the light shielding layer since the light shielding portion has the same shape and the same size as the black matrix in the liquid crystal display panel, the light shielding layer not only does not affect the aperture ratio of the liquid crystal display panel, but also forms a pattern of the light shielding layer by a patterning process.
  • the same mask plate as the black matrix can be used, that is, the light shielding layer added to the polarizer provided by the embodiment of the present invention does not increase the number of the mask, and does not increase the manufacturing cost; or, the light shielding layer can be directly used.
  • a black matrix in the liquid crystal display panel it functions to prevent light leakage of components such as gate lines, data lines, and thin film transistors.
  • the black matrix of the opposite substrate side of the liquid crystal display panel can be omitted, and the liquid crystal display can be simplified.
  • the manufacturing process of the panel reduces the manufacturing cost of the liquid crystal display panel.
  • the pattern of the light shielding portion in the light shielding layer is not limited to the shape shown in FIG. 1 to FIG. 3, and the aperture ratio of the liquid crystal display panel and the shielding film may be at least affected.
  • the mask is appropriately adjusted according to the actual fabrication process.
  • the shape of the light portion is not limited herein.
  • the material of the light shielding portion may be a material for forming a black matrix in the liquid crystal display panel, and the material of the black matrix in the liquid crystal display panel and the existing black matrix
  • the materials are similar and will not be described here.
  • other materials similar to those capable of blocking light can also be used, which are not limited herein.
  • an embodiment of the present invention further provides a liquid crystal display panel, as shown in FIG. 5 and FIG. 6, comprising: a liquid crystal cell 4, an upper polarizer 5, and a lower polarizer 6; wherein the liquid crystal cell 4 is disposed at The polarizer 5 is disposed between the upper polarizer 5 and the lower polarizer 6; and the lower polarizer 6 is the polarizer provided by the embodiment of the present invention.
  • a liquid crystal display panel as shown in FIG. 5 and FIG. 6, comprising: a liquid crystal cell 4, an upper polarizer 5, and a lower polarizer 6; wherein the liquid crystal cell 4 is disposed at The polarizer 5 is disposed between the upper polarizer 5 and the lower polarizer 6; and the lower polarizer 6 is the polarizer provided by the embodiment of the present invention.
  • the liquid crystal display panel reference may be made to the embodiment of the polarizer described above, and the repeated description is omitted.
  • the light shielding layer added on the lower polarizer can block the liquid crystal display panel.
  • the channel of the thin film transistor is shielded from the backlight, so that the channel of the thin film transistor is prevented from being irradiated by the backlight to cause leakage current of the thin film transistor, thereby preventing the liquid crystal display panel from being defective such as flicker and crosstalk. Affect the display quality of the liquid crystal display panel.
  • the liquid crystal cell 4 may specifically include: opposite opposing substrates 41 and array substrates 42 , and The liquid crystal layer 43 between the opposite substrate 41 and the array substrate 42; wherein the side of the array substrate 42 facing the liquid crystal layer 43 is provided with a thin film transistor 44; wherein the specific structure of the thin film transistor 44 is similar to that of the existing thin film transistor
  • the gate electrode 441 and the active layer 442 are electrically insulated from each other, and the source electrode 443 and the drain electrode 444 are electrically connected to the active layer 442, respectively.
  • the pixel electrode 45 is further disposed on a side of the array substrate 42 facing the liquid crystal layer 43.
  • the pixel electrode 45 is electrically connected to the drain electrode 444.
  • the liquid crystal display panel provided by the embodiment of the present invention is particularly suitable for the case where the source electrode 443 and the drain electrode 444 in the thin film transistor are both above the active layer 442, for example, As shown in FIG. 5, the source electrode 443 and the drain electrode 444 are both located above the active layer 442, and the gate electrode 441 is located below the active layer 442; or, as shown in FIG. 6, the source electrode 443 and the drain electrode 444 are located.
  • the gate electrode 441 is located above the source electrode 443 and the drain electrode 444; since the source electrode 443, the drain electrode 444 and the data line are disposed in the same layer, the data line is also located above the active layer 442, such that The light reflected by the backlight after being irradiated to the data line is more likely to illuminate the channel of the thin film transistor, and the liquid crystal display panel can be significantly improved by adding a light shielding layer that can block the data line and the channel in the lower polarizer 6. Blinking, crosstalk, etc. are not good.
  • one side of the lower polarizer without the light shielding layer may be attached to the array substrate; or the lower polarizer may be disposed on one side of the light shielding layer. It is bonded to the array substrate and is not limited herein.
  • an embodiment of the present invention further provides a display device, including the liquid crystal display panel and the backlight module provided by the embodiment of the present invention, wherein a lower polarizer in the liquid crystal display panel is adjacent to the backlight module;
  • the device can be any product or component having a display function such as a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, a navigator, and the like.
  • a display device reference may be made to the embodiment of the liquid crystal display panel described above, and the repeated description is omitted.
  • an embodiment of the present invention further provides a method for fabricating a polarizer.
  • the polarizer is applied to a liquid crystal display panel, as shown in FIG. 7, and includes the following steps:
  • the light shielding layer includes a light shielding portion for covering at least a channel of the thin film transistor in the liquid crystal display panel.
  • the step S702 in the above method provided by the embodiment of the present invention forms a light shielding layer, which may be specifically implemented by forming a pattern of a plurality of light shielding portions corresponding to the thin film transistors in the liquid crystal display panel by a patterning process.
  • each of the light shielding portions is consistent with the shape of the corresponding thin film transistor
  • the size of each light shielding portion may be equal to the size of the corresponding thin film transistor, or the size of each light shielding portion may be larger than the size of the corresponding thin film transistor It is only required to ensure that the shading portions of the liquid crystal display panel do not affect the aperture ratio of the liquid crystal display panel, which is not limited herein; that is, the pattern of the light shielding portion in the light shielding layer can block the region where the thin film transistor is located, so that the thin film transistor can be avoided.
  • the edge of the channel leaks light, so that the pattern of the light shielding portion in the light shielding layer shields the channel of the thin film transistor from the backlight, so that the channel of the thin film transistor can be further protected from the backlight, and further can be further Ensure that the LCD panel does not cause defects such as flicker, crosstalk, etc. Affect the display quality of the liquid crystal display panel.
  • the step S702 in the above method provided by the embodiment of the present invention forms a light shielding layer, which may be specifically implemented by forming a blackout matrix shape, a size, and a position corresponding to the black matrix in the liquid crystal display panel by a patterning process.
  • the pattern of the part in this way, the light shielding layer can not only block the channel of the thin film transistor, but also prevent the channel of the thin film transistor from being directly exposed to the backlight to generate leakage current, and the light shielding layer can also block the data line to prevent the backlight from being reflected after the data line is reflected. Light illuminates the channel of the thin film transistor to cause leakage current to the thin film transistor, thereby In order to further improve the defects such as flicker and crosstalk existing in the liquid crystal display panel.
  • the light shielding layer since the light shielding portion has the same shape and the same size as the black matrix in the liquid crystal display panel, the light shielding layer not only does not affect the aperture ratio of the liquid crystal display panel, but also forms a pattern of the light shielding layer by a patterning process.
  • the same mask plate as the black matrix can be used, that is, the light shielding layer added to the polarizer provided by the embodiment of the present invention does not increase the number of the mask, and does not increase the manufacturing cost; or, the light shielding layer can be directly used.
  • a black matrix in the liquid crystal display panel it functions to prevent light leakage of components such as gate lines, data lines, and thin film transistors.
  • the black matrix of the opposite substrate side of the liquid crystal display panel can be omitted, and the liquid crystal display can be simplified.
  • the manufacturing process of the panel reduces the manufacturing cost of the liquid crystal display panel.
  • the step S702 in the above method provided by the embodiment of the present invention forms a light shielding layer, which can be specifically realized by forming a light shielding portion by using a material forming a black matrix in the liquid crystal display panel.
  • a material forming a black matrix in the liquid crystal display panel can be used to form the light shielding layer, which is not limited herein.
  • the polarizer includes a polarizing film and a light shielding layer on the polarizing film, wherein the light shielding layer includes a light shielding portion for covering at least the polarizing film, and the liquid crystal display panel and the display device.
  • a channel of a thin film transistor in a liquid crystal display panel when the polarizer is used as a lower polarizer in the liquid crystal display panel, an additional light shielding layer disposed on the polarizer can block a channel of the thin film transistor in the liquid crystal display panel so that It is not exposed to the backlight, so that the channel of the thin film transistor can be prevented from being irradiated by the backlight to cause leakage current of the thin film transistor, thereby preventing the liquid crystal display panel from causing defects such as flicker, crosstalk and the like to affect the display quality of the liquid crystal display panel.

Abstract

一种偏光片、其制作方法、液晶显示面板及显示装置。该偏光片包括：偏光膜（1）和位于偏光膜（1）上的遮光层（2）；其中，遮光层（2）包括遮光部（3），用于至少覆盖液晶显示面板中的薄膜晶体管的沟道；在利用该偏光片作为液晶显示面板中的下偏光片时，在该偏光片上增加设置的遮光层（2）可以遮挡液晶显示面板中的薄膜晶体管的沟道以使其不受背光的照射，这样，可以避免薄膜晶体管的沟道受到背光的照射而使薄膜晶体管产生漏电流，从而可以避免液晶显示面板产生诸如闪烁、串扰等不良而影响液晶显示面板的显示品质。

Description

一种偏光片、其制作方法、液晶显示面板及显示装置 技术领域
本发明涉及显示技术领域，尤其涉及一种偏光片、其制作方法、液晶显示面板及显示装置。
背景技术
在现有的显示装置中，液晶显示器(LCD，Liquid Crystal Display)具有功耗低、显示质量高、无电磁辐射以及应用范围广等优点，是目前较为重要的显示装置。
液晶显示器一般包括液晶显示面板和为液晶显示面板提供光源的背光模组；其中，液晶显示面板由下到上依次包括：下偏光片、阵列基板、液晶层、对向基板和上偏光片；背光模组发出的光通过下偏光片射向液晶显示面板中的阵列基板。
在现有的液晶显示器中，在阵列基板面向液晶层的一侧一般设置有薄膜晶体管(Thin Film Transistor，TFT)和像素电极，背光模组发出的光通过下偏光片会照射到阵列基板上的TFT，阵列基板上的TFT在受到背光的照射后会产生漏电流。以底栅型TFT为例进行说明，底栅型TFT中的栅电极位于有源层的下方，栅电极原理上可以遮挡TFT沟道不受背光的照射；然而，实际制作工艺很难保证所有TFT的沟道能够完全被栅电极遮挡，并且，阵列基板上不同位置处的TFT的沟道受背光照射的情况不同；这样，阵列基板上不同位置处的TFT产生的漏电流不同，从而会导致阵列基板上不同位置处的像素电极的电压不同，进而会使液晶显示器产生诸如闪烁、串扰等不良，影响液晶显示器的显示品质。
发明内容
有鉴于此，本发明实施例提供了一种偏光片、其制作方法、液晶显示面板及显示装置，用以解决现有技术中存在的由于薄膜晶体管受背光照射而引起的闪烁、串扰等不良的问题。
因此，本发明实施例提供了一种偏光片，应用于液晶显示面板，包括：偏光膜；还包括：位于所述偏光膜上的遮光层；
所述遮光层包括遮光部，用于至少覆盖所述液晶显示面板中的薄膜晶 体管的沟道。
在一种可能的实现方式中，在本发明实施例提供的上述偏光片中，所述遮光层包括多个遮光部，所述多个遮光部与所述液晶显示面板中的薄膜晶体管一一对应；
每个所述遮光部的形状与对应的薄膜晶体管的形状一致，每个所述遮光部的尺寸大于或等于对应的薄膜晶体管的尺寸。
在一种可能的实现方式中，在本发明实施例提供的上述偏光片中，所述遮光部与所述液晶显示面板中的黑矩阵形状一致、尺寸相同且位置对应。
在一种可能的实现方式中，在本发明实施例提供的上述偏光片中，所述遮光部的材料为形成所述液晶显示面板中的黑矩阵的材料。
本发明实施例还提供了一种液晶显示面板，包括：液晶盒、上偏光片和下偏光片；其中，所述液晶盒设置在所述上偏光片与所述下偏光片之间；
所述下偏光片采用本发明实施例提供的上述偏光片。
在一种可能的实现方式中，在本发明实施例提供的上述液晶显示面板中，所述液晶盒，包括：相对而置的对向基板和阵列基板、以及位于所述对向基板和所述阵列基板之间的液晶层；其中，所述阵列基板面向所述液晶层的一侧设置有薄膜晶体管；
所述薄膜晶体管，包括：相互绝缘的栅电极和有源层、以及与所述有源层分别电性连接的源电极和漏电极；其中，所述源电极和所述漏电极均位于所述有源层的上方；所述栅电极位于所述有源层的下方。
在一种可能的实现方式中，在本发明实施例提供的上述液晶显示面板中，所述液晶盒，包括：相对而置的对向基板和阵列基板、以及位于所述对向基板和所述阵列基板之间的液晶层；其中，所述阵列基板面向所述液晶层的一侧设置有薄膜晶体管；
所述薄膜晶体管，包括：相互绝缘的栅电极和有源层、以及与所述有源层分别电性连接的源电极和漏电极；其中，所述源电极和所述漏电极均位于所述有源层的上方；所述栅电极位于所述源电极和所述漏电极的上方。
本发明实施例还提供了一种显示装置，包括：本发明实施例提供的上述液晶显示面板和背光模组；其中，所述液晶显示面板中的下偏光片靠近所述背光模组。
本发明实施例还提供了一种偏光片的制作方法，所述偏光片应用于液晶显示面板，包括：
形成偏光膜；
在所述偏光膜上形成遮光层；其中，所述遮光层包括遮光部，用于至少覆盖所述液晶显示面板中的薄膜晶体管的沟道。
在一种可能的实现方式中，在本发明实施例提供的上述方法中，形成遮光层包括：
采用构图工艺形成与所述液晶显示面板中的薄膜晶体管一一对应的多个遮光部的图形；其中，每个所述遮光部的形状与对应的薄膜晶体管的形状一致，每个所述遮光部的尺寸大于或等于对应的薄膜晶体管的尺寸。
在一种可能的实现方式中，在本发明实施例提供的上述方法中，形成遮光层包括：
采用构图工艺形成与所述液晶显示面板中的黑矩阵形状一致、尺寸相同且位置对应的遮光部的图形。
在一种可能的实现方式中，在本发明实施例提供的上述方法中，形成遮光层包括：
采用形成所述液晶显示面板中的黑矩阵的材料形成遮光部。
在本发明实施例提供的上述偏光片、其制作方法、液晶显示面板及显示装置中，该偏光片包括：偏光膜和位于偏光膜上的遮光层；其中，遮光层包括遮光部，用于至少覆盖液晶显示面板中的薄膜晶体管的沟道；在利用该偏光片作为液晶显示面板中的下偏光片时，在该偏光片上增加设置的遮光层可以遮挡液晶显示面板中的薄膜晶体管的沟道以使其不受背光的照射，这样，可以避免薄膜晶体管的沟道受到背光的照射而使薄膜晶体管产生漏电流，从而可以避免液晶显示面板产生诸如闪烁、串扰等不良而影响液晶显示面板的显示品质。
附图说明
图1-图3分别为本发明实施例提供的偏光片的结构示意图；
图4为现有的液晶显示面板中的阵列基板的结构示意图；
图5和图6分别为本发明实施例提供的液晶显示面板的结构示意图；
图7为本发明实施例提供的偏光片的制作方法的流程图。
具体实施方式
下面结合附图，对本发明实施例提供的一种偏光片、其制作方法、液晶显示面板及显示装置的具体实施方式进行详细地说明。
附图中各膜层的形状和厚度不反映其真实比例，目的只是示意说明本发明内容。
本发明实施例提供的一种偏光片，该偏光片应用于液晶显示面板中，如图1-图3所示，包括：偏光膜1；还包括：位于偏光膜1上的遮光层2；
遮光层2包括遮光部3，用于至少覆盖液晶显示面板中的薄膜晶体管的沟道。
本发明实施例提供的上述偏光片，由于在偏光片上增加设置用于至少覆盖液晶显示面板中的薄膜晶体管的沟道的遮光层，这样，在利用该偏光片作为液晶显示面板中的下偏光片(即靠近背光模组的偏光片)时，在该偏光片上增加设置的遮光层可以遮挡液晶显示面板中的薄膜晶体管的沟道以使其不受背光的照射，从而可以避免薄膜晶体管的沟道受到背光的照射而使薄膜晶体管产生漏电流，进而可以避免液晶显示面板产生诸如闪烁、串扰等不良而影响液晶显示面板的显示品质。
一般地，在现有的液晶显示面板的阵列基板上，如图4所示，设置有相互绝缘且交叉而置的多条栅线10和多条数据线11，在每条栅线10和每条数据线11的交叉位置处设置有薄膜晶体管12，每个薄膜晶体管12包括：相互绝缘的栅电极121和有源层122、以及与有源层122分别电性连接的源电极123和漏电极124；在源电极123和漏电极124之间且与栅电极121正对的区域形成沟道。
需要说明的是，图4所示的薄膜晶体管仅为现有的薄膜晶体管的结构示意图，现有的薄膜晶体管的结构并非局限于如图4所示的结构，在此不做限定。
在具体实施时，在本发明实施例提供的上述偏光片中，遮光部的图形用于至少覆盖液晶显示面板中的薄膜晶体管的沟道。具体地，如图1所示，遮光层2中遮光部3的图形可以仅遮挡对应的液晶显示面板中的薄膜晶体管的沟道所在的区域，即遮光部的图形与薄膜晶体管的沟道一一对应、形状一致且尺寸相同；或者，如图2和图3所示，遮光层2中遮光部3的图形还可以在不影响液晶显示面板的开口率的前提下遮挡薄膜晶体管的沟道所在的区域和沟道以外的区域，在此不做限定。
在具体实施时，在本发明实施例提供的上述偏光片中，遮光部的图形遮挡薄膜晶体管的沟道所在的区域和沟道以外的区域时，如图2所示，遮光层2可以包括多个遮光部，所述多个遮光部与液晶显示面板中的薄膜晶体管一一对应；每个遮光部3的形状与对应的薄膜晶体管的形状一致，每个遮光部3的尺寸可以等于对应的薄膜晶体管的尺寸，或者，每个遮光部3的尺寸也可以大于对应的薄膜晶体管的尺寸，只需保证设置的各遮光部3不会影响液晶显示面板的开口率即可，在此不做限定；即遮光层2中遮光部3的图形可以遮挡薄膜晶体管所在的区域，这样，可以避免薄膜晶体管的沟道的边缘漏光，使得遮光层2中遮光部3的图形遮挡薄膜晶体管的沟道不受背光照射的效果更佳，从而可以进一步地保证薄膜晶体管的沟道不会受到背光的照射，进而可以进一步地保证液晶显示面板不会产生诸如闪烁、串扰等不良而影响液晶显示面板的显示品质。
在具体实施时，在本发明实施例提供的上述偏光片中，遮光部的图形遮挡薄膜晶体管的沟道所在的区域和沟道以外的区域时，如图3所示，遮光部3可以与液晶显示面板中的黑矩阵形状一致、尺寸相同且位置对应，即遮光部3在偏光膜1的正投影与液晶显示面板中的黑矩阵在偏光膜1的正投影恰好重合。这样，遮光层2不仅可以遮挡薄膜晶体管的沟道，避免薄膜晶体管的沟道直接受到背光的照射而产生漏电流；并且，遮光层2还可以遮挡数据线，避免背光照射到数据线后反射的光线照射到薄膜晶体管的沟道而使薄膜晶体管产生漏电流，从而可以进一步地改善液晶显示面板存在的闪烁、串扰等不良。
需要说明的是，由于遮光部与液晶显示面板中的黑矩阵形状一致且尺寸相同，因此，遮光层不仅不会影响液晶显示面板的开口率，并且，在通过构图工艺形成遮光层的图形时，可以使用与形成黑矩阵的图形相同的掩模板，即本发明实施例提供的上述偏光片中增设的遮光层不会增加掩模板的数量，不会增加制作成本；或者，还可以直接利用遮光层作为液晶显示面板中的黑矩阵来起到防止栅线、数据线和薄膜晶体管等部件漏光的作用，这样，还可以省去液晶显示面板中对向基板一侧的黑矩阵的设置，简化液晶显示面板的制作工艺，降低液晶显示面板的制作成本。
当然，在本发明实施例提供的上述偏光片中，遮光层中遮光部的图形并非仅局限于如图1-图3所示的形状，可以在不影响液晶显示面板的开口率和至少遮挡薄膜晶体管的沟道的前提下，根据实际制作工艺适当调整遮 光部的形状，在此不做限定。
在具体实施时，在本发明实施例提供的上述偏光片中，遮光部的材料可以为形成液晶显示面板中的黑矩阵的材料，液晶显示面板中的黑矩阵的材料与现有的黑矩阵的材料类似，在此不做赘述。当然，也可以采用其他类似可以起到遮光作用的材料，在此不做限定。
基于同一发明构思，本发明实施例还提供了一种液晶显示面板，如图5和图6所示，包括：液晶盒4、上偏光片5和下偏光片6；其中，液晶盒4设置在上偏光片5与下偏光片6之间；下偏光片6采用本发明实施例提供的上述偏光片。该液晶显示面板的实施可以参见上述偏光片的实施例，重复之处不再赘述。
本发明实施例提供的上述液晶显示面板，由于在下偏光片上增加设置用于至少覆盖液晶显示面板中的薄膜晶体管的沟道的遮光层，这样，在下偏光片上增加设置的遮光层可以遮挡液晶显示面板中的薄膜晶体管的沟道以使其不受背光的照射，从而可以避免薄膜晶体管的沟道受到背光的照射而使薄膜晶体管产生漏电流，进而可以避免液晶显示面板产生诸如闪烁、串扰等不良而影响液晶显示面板的显示品质。
在具体实施时，在本发明实施例提供的上述液晶显示面板中，如图5和图6所示，液晶盒4，具体可以包括：相对而置的对向基板41和阵列基板42、以及位于对向基板41和阵列基板42之间的液晶层43；其中，阵列基板42面向液晶层43的一侧设置有薄膜晶体管44；其中，薄膜晶体管44的具体结构与现有的薄膜晶体管的结构类似，包括：相互绝缘的栅电极441和有源层442、以及与有源层442分别电性连接的源电极443和漏电极444；阵列基板42面向液晶层43的一侧还设置有像素电极45，像素电极45与漏电极444电性连接；本发明实施例提供的上述液晶显示面板尤其适用于薄膜晶体管中的源电极443和漏电极444均位于有源层442的上方的情况，例如，如图5所示，源电极443和漏电极444均位于有源层442的上方，栅电极441位于有源层442的下方；或者，如图6所示，源电极443和漏电极444均位于有源层442的上方，栅电极441位于源电极443和漏电极444的上方；由于源电极443、漏电极444和数据线同层设置，因此，数据线也位于有源层442的上方，这样，背光照射到数据线后反射的光线更容易照射到薄膜晶体管的沟道，通过在下偏光片6中增加设置可以遮挡数据线和沟道的遮光层可以明显改善液晶显示面板的 闪烁、串扰等不良。
需要说明的是，在本发明实施例提供的上述液晶显示面板中，可以将下偏光片未设置遮光层的一侧与阵列基板贴合；或者，也可以将下偏光片设置遮光层的一侧与阵列基板贴合，在此不做限定。
基于同一发明构思，本发明实施例还提供了一种显示装置，包括本发明实施例提供的上述液晶显示面板和背光模组，其中，液晶显示面板中的下偏光片靠近背光模组；该显示装置可以为：手机、平板电脑、电视机、显示器、笔记本电脑、数码相框、导航仪等任何具有显示功能的产品或部件。该显示装置的实施可以参见上述液晶显示面板的实施例，重复之处不再赘述。
基于同一发明构思，本发明实施例还提供了一种偏光片的制作方法，偏光片应用于液晶显示面板，如图7所示，包括如下步骤：
S701、形成偏光膜；
S702、在偏光膜上形成遮光层；其中，遮光层包括遮光部，用于至少覆盖液晶显示面板中的薄膜晶体管的沟道。
在具体实施时，本发明实施例提供的上述方法中的步骤S702形成遮光层，具体可以通过以下方式实现：采用构图工艺形成与液晶显示面板中的薄膜晶体管一一对应的多个遮光部的图形；其中，每个遮光部的形状与对应的薄膜晶体管的形状一致，每个遮光部的尺寸可以等于对应的薄膜晶体管的尺寸，或者，每个遮光部的尺寸也可以大于对应的薄膜晶体管的尺寸，只需保证设置的各遮光部不会影响液晶显示面板的开口率即可，在此不做限定；即遮光层中遮光部的图形可以遮挡薄膜晶体管所在的区域，这样，可以避免薄膜晶体管的沟道的边缘漏光，使得遮光层中遮光部的图形遮挡薄膜晶体管的沟道不受背光照射的效果更佳，从而可以进一步地保证薄膜晶体管的沟道不会受到背光的照射，进而可以进一步地保证液晶显示面板不会产生诸如闪烁、串扰等不良而影响液晶显示面板的显示品质。
在具体实施时，本发明实施例提供的上述方法中的步骤S702形成遮光层，具体可以通过以下方式实现：采用构图工艺形成与液晶显示面板中的黑矩阵形状一致、尺寸相同且位置对应的遮光部的图形，这样，遮光层不仅可以遮挡薄膜晶体管的沟道，避免薄膜晶体管的沟道直接受到背光的照射而产生漏电流，遮光层还可以遮挡数据线，避免背光照射到数据线后反射的光线照射到薄膜晶体管的沟道而使薄膜晶体管产生漏电流，从而可 以进一步地改善液晶显示面板存在的闪烁、串扰等不良。
需要说明的是，由于遮光部与液晶显示面板中的黑矩阵形状一致且尺寸相同，因此，遮光层不仅不会影响液晶显示面板的开口率，并且，在通过构图工艺形成遮光层的图形时，可以使用与形成黑矩阵的图形相同的掩模板，即本发明实施例提供的上述偏光片中增设的遮光层不会增加掩模板的数量，不会增加制作成本；或者，还可以直接利用遮光层作为液晶显示面板中的黑矩阵来起到防止栅线、数据线和薄膜晶体管等部件漏光的作用，这样，还可以省去液晶显示面板中对向基板一侧的黑矩阵的设置，简化液晶显示面板的制作工艺，降低液晶显示面板的制作成本。
在具体实施时，本发明实施例提供的上述方法中的步骤S702形成遮光层，具体可以通过以下方式实现：采用形成液晶显示面板中的黑矩阵的材料形成遮光部。当然，还可以采用其他类似可以起到遮光作用的材料形成遮光层，在此不做限定。
本发明实施例提供的一种偏光片、其制作方法、液晶显示面板及显示装置，该偏光片包括：偏光膜和位于偏光膜上的遮光层；其中，遮光层包括遮光部，用于至少覆盖液晶显示面板中的薄膜晶体管的沟道；在利用该偏光片作为液晶显示面板中的下偏光片时，在该偏光片上增加设置的遮光层可以遮挡液晶显示面板中的薄膜晶体管的沟道以使其不受背光的照射，这样，可以避免薄膜晶体管的沟道受到背光的照射而使薄膜晶体管产生漏电流，从而可以避免液晶显示面板产生诸如闪烁、串扰等不良而影响液晶显示面板的显示品质。
显然，本领域的技术人员可以对本发明进行各种改动和变型而不脱离本发明的精神和范围。这样，倘若本发明的这些修改和变型属于本发明权利要求及其等同技术的范围之内，则本发明也意图包含这些改动和变型在内。

Claims (12)

  1. 一种偏光片，应用于液晶显示面板，包括：偏光膜；其特征在于，还包括：位于所述偏光膜上的遮光层；
    所述遮光层包括遮光部，用于至少覆盖所述液晶显示面板中的薄膜晶体管的沟道。
  2. 如权利要求1所述的偏光片，其特征在于，所述遮光层包括多个遮光部，所述多个遮光部与所述液晶显示面板中的薄膜晶体管一一对应；
    每个所述遮光部的形状与对应的薄膜晶体管的形状一致，每个所述遮光部的尺寸大于或等于对应的薄膜晶体管的尺寸。
  3. 如权利要求1所述的偏光片，其特征在于，所述遮光部与所述液晶显示面板中的黑矩阵形状一致、尺寸相同且位置对应。
  4. 如权利要求1-3任一项所述的偏光片，其特征在于，所述遮光部的材料为形成所述液晶显示面板中的黑矩阵的材料。
  5. 一种液晶显示面板，包括：液晶盒、上偏光片和下偏光片；其中，所述液晶盒设置在所述上偏光片与所述下偏光片之间；其特征在于：
    所述下偏光片采用如权利要求114任一项所述的偏光片。
  6. 如权利要求5所述的液晶显示面板，其特征在于，所述液晶盒，包括：相对而置的对向基板和阵列基板、以及位于所述对向基板和所述阵列基板之间的液晶层；其中，所述阵列基板面向所述液晶层的一侧设置有薄膜晶体管；
    所述薄膜晶体管，包括：相互绝缘的栅电极和有源层、以及与所述有源层分别电性连接的源电极和漏电极；其中，所述源电极和所述漏电极均位于所述有源层的上方；所述栅电极位于所述有源层的下方。
  7. 如权利要求5所述的液晶显示面板，其特征在于，所述液晶盒，包括：相对而置的对向基板和阵列基板、以及位于所述对向基板和所述阵列基板之间的液晶层；其中，所述阵列基板面向所述液晶层的一侧设置有薄膜晶体管；
    所述薄膜晶体管，包括：相互绝缘的栅电极和有源层、以及与所述有源层分别电性连接的源电极和漏电极；其中，所述源电极和所述漏电极均位于所述有源层的上方；所述栅电极位于所述源电极和所述漏电极的上方。
  8. 一种显示装置，其特征在于，包括：如权利要求5-7任一项所述的液晶显示面板和背光模组；其中，所述液晶显示面板中的下偏光片靠近所述背光模组。
  9. 一种偏光片的制作方法，所述偏光片应用于液晶显示面板，其特征在于，包括：
    形成偏光膜；
    在所述偏光膜上形成遮光层；其中，所述遮光层包括遮光部，用于至少覆盖所述液晶显示面板中的薄膜晶体管的沟道。
  10. 如权利要求9所述的方法，其特征在于，形成遮光层包括：
    采用构图工艺形成与所述液晶显示面板中的薄膜晶体管一一对应的多个遮光部的图形；其中，每个所述遮光部的形状与对应的薄膜晶体管的形状一致，每个所述遮光部的尺寸大于或等于对应的薄膜晶体管的尺寸。
  11. 如权利要求9所述的方法，其特征在于，形成遮光层包括：
    采用构图工艺形成与所述液晶显示面板中的黑矩阵形状一致、尺寸相同且位置对应的遮光部的图形。
  12. 如权利要求9-11任一项所述的方法，其特征在于，形成遮光层包括：
    采用形成所述液晶显示面板中的黑矩阵的材料形成遮光部。
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