WO2021114504A1 - 液晶显示面板及液晶显示装置 - Google Patents

液晶显示面板及液晶显示装置 Download PDF

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Publication number
WO2021114504A1
WO2021114504A1 PCT/CN2020/079468 CN2020079468W WO2021114504A1 WO 2021114504 A1 WO2021114504 A1 WO 2021114504A1 CN 2020079468 W CN2020079468 W CN 2020079468W WO 2021114504 A1 WO2021114504 A1 WO 2021114504A1
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WO
WIPO (PCT)
Prior art keywords
color filter
liquid crystal
crystal display
display panel
fingerprint
Prior art date
Application number
PCT/CN2020/079468
Other languages
English (en)
French (fr)
Inventor
张桂洋
Original Assignee
武汉华星光电技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 武汉华星光电技术有限公司 filed Critical 武汉华星光电技术有限公司
Priority to US16/955,105 priority Critical patent/US11429001B2/en
Publication of WO2021114504A1 publication Critical patent/WO2021114504A1/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
    • G02F1/133509—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
    • 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
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
    • G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
    • G06V40/12—Fingerprints or palmprints
    • G06V40/13—Sensors therefor
    • G06V40/1318—Sensors therefor using electro-optical elements or layers, e.g. electroluminescent sensing

Definitions

  • This application relates to the field of display technology, in particular to liquid crystal display panels and liquid crystal display devices.
  • Optical fingerprint recognition is the earliest fingerprint recognition technology.
  • the early optical fingerprint recognition technology required a relatively large optical path system, so it was mostly used on larger equipment such as access control and card punching machines.
  • fingerprint recognition technology has been gradually applied to portable display devices such as mobile phones and tablet computers.
  • portable display devices such as mobile phones and tablet computers.
  • capacitive fingerprint recognition technology has been developed.
  • the optical fingerprint recognition technology is a technology that uses the reflected light of fingerprints to identify fingerprint characteristics.
  • the reflected light can penetrate the transparent display and reach the inside of the display. Therefore, the optical fingerprint recognition module can be integrated into the display area of the display. Conducive to the "full screen" design of mobile phones and other devices.
  • the liquid crystal display panel needs a backlight to provide a light source, the backlight reflected by the fingerprint will generate more interference signals in the fingerprint recognition area, which is mainly manifested as a large amount of large-angle reflected light directed to the fingerprint recognition module.
  • the accuracy of fingerprint recognition module recognition of fingerprints is affected by the "signal to noise ratio".
  • the so-called “signal to noise ratio” refers to the ratio of the reflected light at a small angle to the reflected light at a large angle.
  • the optical fingerprint recognition module integrated in the liquid crystal display panel is affected by the reflected light of fingerprints at a large angle, and its "signal to noise ratio" is low, and the fingerprint recognition accuracy is low.
  • This application provides a liquid crystal display panel, including:
  • a color filter substrate the color filter substrate includes two upper and lower color filter layers, and the positions of the upper and lower color filter layers are in one-to-one correspondence with the same color correspondence;
  • An array substrate which is arranged opposite to the color filter substrate;
  • the liquid crystal layer is arranged between the color filter substrate and the array substrate;
  • a fingerprint recognition unit is arranged between the color filter substrate and the array substrate, and the fingerprint recognition unit recognizes fingerprint characteristics by receiving the reflected light of the fingerprint passing through the color filter substrate.
  • each layer of the color filter layer includes a plurality of color filter blocks, and a black matrix is arranged between the color filter blocks, and the black matrix is used to prevent passing through adjacent The light of the two color filter blocks interfere with each other.
  • the position of the fingerprint identification unit corresponds to the position of the black matrix
  • the area corresponding to the black matrix perpendicularly to the fingerprint identification unit is an open area to ensure that light is directed to the fingerprint identification unit through the open area.
  • the color filter substrate includes a glass substrate, a first color filter layer provided on the upper surface of the glass substrate, and a second color filter layer provided on the lower surface of the glass substrate,
  • the positions of the first color filter layer and the second color filter layer are in one-to-one correspondence, and the colors are the same.
  • the first color filter layer and the second color filter layer respectively include a red filter block, a green filter block, and a blue filter block.
  • the black matrix includes a horizontal matrix line and a vertical matrix line, and the horizontal matrix line and the vertical matrix line divide the color filter layer into a plurality of filter regions, and The color filter block is filled in the filter area.
  • the fingerprint identification unit is disposed on the surface of the array substrate facing the liquid crystal layer.
  • the vertical projection area of the fingerprint identification unit on the black matrix is located on the horizontal matrix line.
  • the vertical projection area of the fingerprint identification unit on the black matrix is located on the longitudinal matrix line.
  • the vertical projection area of the fingerprint identification unit on the black matrix and the color filter block are arranged in parallel.
  • the fingerprint identification unit is arranged on the surface of the color filter substrate facing the liquid crystal layer.
  • the fingerprint identification unit is arranged on the horizontal matrix line.
  • the fingerprint identification unit is arranged on the longitudinal matrix line.
  • the fingerprint identification unit is arranged on the longitudinal matrix line, and is arranged side by side with the color filter block.
  • a light filter film is provided on a side surface of the fingerprint recognition unit that receives light, and the filter film is used to filter the light directed to the fingerprint recognition unit into monochromatic light.
  • the present application also provides a liquid crystal display device, including the liquid crystal display panel as described above;
  • the backlight module is arranged on the back side of the liquid crystal display panel and is used to provide backlight for the liquid crystal display panel.
  • each layer of the color filter layer includes a plurality of color filter blocks, a black matrix is arranged between the color filter blocks, and the black The matrix is used to prevent the light passing through two adjacent color filter blocks from interfering with each other.
  • the position of the fingerprint identification unit corresponds to the position of the black matrix, and the area corresponding to the black matrix perpendicularly to the fingerprint identification unit is Opening area.
  • the color filter substrate includes a glass substrate, a first color filter layer provided on the upper surface of the glass substrate, and a second color filter layer provided on the lower surface of the glass substrate,
  • the positions of the first color filter layer and the second color filter layer are in one-to-one correspondence, and the colors are the same.
  • the black matrix includes a horizontal matrix line and a vertical matrix line, and the horizontal matrix line and the vertical matrix line divide the color filter layer into a plurality of filter regions, and The color filter block is filled in the filter area;
  • the fingerprint identification unit is arranged corresponding to the horizontal matrix line; or
  • the fingerprint identification unit is arranged corresponding to the longitudinal matrix line.
  • the liquid crystal display panel and the liquid crystal display device provided by the present application include a color filter substrate with two upper and lower color filter layers, and a fingerprint recognition unit is arranged on the lower side of the color filter substrate.
  • the upper layer is colored
  • the filter layer can block the fingerprint reflection light at a large angle, and improve the "signal to noise ratio" of the fingerprint reflection light directed to the fingerprint recognition unit, thereby improving the accuracy of fingerprint recognition.
  • FIG. 1 is a top view of a liquid crystal display panel provided by an embodiment of the present application
  • FIG. 2 is a partial enlarged view of a region A of an embodiment of the liquid crystal display panel shown in FIG. 1;
  • FIG. 3 is a cross-sectional view along B-B' of an embodiment of the liquid crystal display panel shown in FIG. 2.
  • the fingerprint identification unit is disposed on the array substrate;
  • FIG. 4 is a cross-sectional view along B-B' of another embodiment of the liquid crystal display panel shown in FIG. 2.
  • the fingerprint identification unit is arranged on the color film substrate;
  • FIG. 5 is a partial enlarged view of area A of another embodiment of the liquid crystal display panel shown in FIG. 1;
  • FIG. 6 is a cross-sectional view along B-B' of an embodiment of the liquid crystal display panel shown in FIG. 5, in this embodiment, the fingerprint identification unit is disposed on the array substrate;
  • Fig. 7 is a cross-sectional view along B-B' of another embodiment of the liquid crystal display panel shown in Fig. 5.
  • the fingerprint identification unit is disposed on the color filter substrate.
  • the embodiment of the application provides a liquid crystal display panel.
  • the color filter substrate of the liquid crystal display panel includes two upper and lower color filter layers.
  • the fingerprint recognition unit is arranged on the lower side of the color filter substrate, and the upper color filter layer is used. Block the fingerprint reflected light at a large angle, improve the "signal-to-noise ratio" of the fingerprint reflected light directed to the fingerprint identification unit, thereby improving the accuracy of fingerprint identification.
  • the fingerprint identification unit is integrated inside the display panel, and there is no need to set a separate fingerprint identification area, and the fingerprint identification of the “full screen” device can be realized.
  • FIG. 1 it is a schematic diagram of a plane structure of a liquid crystal display panel provided by an embodiment of the present application.
  • the liquid crystal display panel includes a plurality of sub-pixel units 1. It should be understood that each of the sub-pixel units 1 corresponds to the A color filter unit on the color filter substrate of the liquid crystal display panel.
  • the color filter substrate may include color filter units with multiple colors, so that the liquid crystal display panel realizes color display.
  • FIG. 2 is a partial enlarged view of area A of an embodiment of the liquid crystal display panel shown in FIG. 1
  • FIG. 3 is an embodiment of the liquid crystal display panel shown in FIG. Sectional view along B-B'.
  • the liquid crystal display panel provided in this embodiment includes a color filter substrate 10, an array substrate 20 disposed opposite to the color filter substrate 10, and a liquid crystal layer 30 disposed between the color filter substrate 10 and the array substrate 20, The liquid crystal layer 30 is filled with liquid crystal LC.
  • the color filter substrate 10 includes two upper and lower color filter layers, and the positions of the upper and lower color filter layers are in one-to-one correspondence with the same color.
  • the color filter layer of the color filter substrate 10 includes multiple colors. , Through the combination of multiple colors, the liquid crystal display panel realizes color display.
  • the color filter substrate 10 includes a glass substrate 12, a first color filter layer 13 provided on the upper surface of the glass substrate 12, and a second color filter layer provided on the lower surface of the glass substrate 12 11.
  • the first color filter layer 13 and the second color filter layer 11 respectively include color filter blocks 110 with multiple different colors.
  • the color filter blocks of the first color filter layer 13 and the color filter of the second color filter layer 11 The positions of the blocks are in one-to-one correspondence, and the color filter blocks of the first color filter layer and the color filter blocks of the second color filter layer corresponding up and down along the first direction D have the same color.
  • Each group of the color filter blocks 110 corresponding up and down along the first direction D respectively forms one color filter unit.
  • the first color filter layer 13 and the second color filter layer 11 include a red filter block 111, a green filter block 112, and a blue filter block 113, respectively.
  • the color filter block of the first color filter layer 13 corresponding to the red filter block 111 of the second color filter layer 11 is also a red filter block 111
  • the color filter block of the first color filter layer 13 corresponding to the green filter block 112 of the second color filter layer 11 is also the green filter block 112, which is the same as the second color filter block 112.
  • the color filter block of the first color filter layer 13 corresponding to the blue filter block 113 of the filter layer 11 is also the blue filter block 113.
  • a black matrix 114 is respectively provided between the color filter blocks 110 of the first color filter layer 13 and between the color filter blocks 110 of the second color filter layer 11, so The black matrix 114 is used to prevent the light passing through two adjacent color filter blocks 110 from interfering with each other.
  • the black matrix 114 includes a horizontal matrix line 1141 for dividing the color filter block 110 into rows and a vertical matrix line 1142 for dividing the color filter block 110 into columns, that is, the horizontal matrix line 1141 And the longitudinal matrix line 1142 divide the first color filter layer 13 and the second color filter layer 11 into a plurality of filter regions, and the color filter blocks 110 are filled in the filter regions .
  • the array substrate 20 is arranged opposite to the color filter substrate 10, and the liquid crystal layer 30 is filled between the array substrate 20 and the color filter substrate 10.
  • the array substrate 20 is provided with scan lines, data lines, pixel electrodes, thin film transistors and other functional elements.
  • the array substrate 20 is used to control the deflection of the liquid crystal LC in the liquid crystal layer 30 to realize the liquid crystal display panel. The function of the display screen.
  • a fingerprint recognition unit FP is provided between the color filter substrate 10 and the array substrate 20, and the fingerprint recognition unit FP recognizes fingerprint characteristics by receiving the fingerprint reflection light reflected by the fingerprint and passing through the color filter substrate.
  • the fingerprint recognition unit FP may be a photoelectric sensor.
  • the fingerprint recognition unit FP receives the light reflected by the fingerprint, converts the light into an electrical signal, and calculates it by the algorithm processing unit. Fingerprint structure features, to achieve fingerprint recognition.
  • the liquid crystal display panel provided in this embodiment may include a plurality of fingerprint identification units FP electrically connected to the algorithm processing unit, each of the fingerprint identification units FP respectively identifying fingerprint features in a certain local area
  • the algorithm processing unit forms a complete fingerprint feature by integrating the fingerprint signals recognized by the plurality of fingerprint recognition units FP.
  • the vertical projection area of the fingerprint identification unit FP on the first color filter layer 13 or the second color filter layer 11 is located on the longitudinal matrix line 1142.
  • the area of the longitudinal matrix line 1142 corresponding to the fingerprint recognition unit FP is an opening area 1142', and the first color filter layer 13 and the second color filter
  • the layer 11 is provided with the opening area 1142', so as to ensure that the fingerprint reflection light can pass through the opening area 1142' to the fingerprint identification unit FP.
  • the fingerprint identification unit FP is arranged between the color filter substrate 10 and the array substrate 20, so that the light reflected by the fingerprint must first pass through the color filter substrate 10 to reach the fingerprint identification Unit FP. Utilize the color filter layer of the color filter substrate 10, especially the first color filter layer 13, to block the large-angle fingerprint reflection light, so that most of the fingerprint reflection light received by the fingerprint recognition unit FP comes from the The local small area above the fingerprint recognition unit FP receives more small-angle fingerprint reflection light, which improves the "signal to noise ratio" of the fingerprint reflection light, thereby improving the recognition accuracy of the fingerprint recognition unit FP.
  • the fingerprint identification unit FP is disposed on the surface of the array substrate 20 facing the liquid crystal layer 30, and the first color filter layer 13 and the second color filter layer 13
  • the area of the second color filter layer 11 corresponding to the fingerprint identification unit FP along the first direction D is the opening area 1142'.
  • the opening area 1142' may allow the fingerprint reflection light directly above the fingerprint recognition unit FP to be directed toward the fingerprint recognition unit.
  • the opening area 1142' is located between the adjacent blue filter block 113 and the red filter block 111.
  • the liquid crystal display panel performs fingerprint recognition, it displays a monochromatic blue light screen. After the blue light emitted by the liquid crystal display panel is reflected by the fingerprint, part of the blue light is emitted to the fingerprint recognition unit FP through the opening area 1142', and part of the blue light is emitted by the fingerprint recognition unit FP.
  • the blue filter block 113 is refracted and then directed toward the fingerprint identification unit FP, and a part of the fingerprint reflection light directed toward the black matrix 114, the red filter block 111 and the green filter block 112 is blocked
  • the color film substrate 10 cannot be penetrated, so as to ensure that the fingerprint reflected light received by the fingerprint identification unit FP is the reflected light of the fingerprint in a small area above the fingerprint identification unit, eliminating the interference of the fingerprint reflected light from other areas , Improve the accuracy of fingerprint recognition.
  • the liquid crystal display panel can also display a monochromatic red light screen during fingerprint recognition, and the propagation principle of the reflected light of the fingerprint is the same as the above, and will not be repeated here.
  • the opening area 1142' may also be located between the adjacent red filter block 111 and the green filter block 112, or located between the adjacent green filter block 112 and the adjacent green filter block 112. Between the blue filter blocks 113.
  • the liquid crystal display panel can display a monochromatic red light screen during fingerprint recognition Or a monochromatic green light screen, and the propagation principle of reflected light from fingerprints is the same as the above.
  • the liquid crystal display panel can display monochromatic green light when performing fingerprint recognition
  • the propagation principle of the reflected light from the fingerprint is the same as the above, so it will not be repeated here.
  • a filter film F is provided on the surface of the fingerprint recognition unit FP that receives the reflected light of the fingerprint, and the filter film F is used to filter the fingerprint reflected light directed to the fingerprint recognition unit FP into a single Color light, for example, the filter film F can filter fingerprint reflection light into monochromatic blue light or monochromatic green light or monochromatic red light.
  • the liquid crystal display panel may display a color screen when performing fingerprint recognition. Take the opening area 1142' located between the adjacent blue filter block 113 and the red filter block 111, and the filter film F filters the fingerprint reflected light into monochromatic blue light as an example.
  • a part of the colored light reflected by the fingerprint passes through the opening area 1142' to the fingerprint identification unit FP, and is filtered by the filter film F into monochromatic blue light; a part of the colored light reflected by the fingerprint passes through the The filtering and refraction effect of the blue filter block 113 is directed to the fingerprint identification unit FP in the form of monochromatic blue light; the other part of the colored light reflected by the fingerprint passes through the red filter block 111 or the green filter block 111
  • the filtering and refraction effect of 112 is directed to the fingerprint recognition unit FP in the form of monochromatic red light or monochromatic green light, and is blocked by the filter film F. Therefore, it is ensured that the fingerprint reflection light received by the fingerprint identification unit FP comes from a small area above it, and the fingerprint identification accuracy of the fingerprint identification unit is ensured.
  • the liquid crystal display panel provided in this embodiment further includes a lower polarizer 40 disposed on the lower side of the array substrate 20, an upper polarizer 50 disposed on the upper side of the color filter substrate 10, and The glass cover plate 60 on the upper side of the upper polarizer 50.
  • the upper polarizer 50 and the lower polarizer 40 are used to adjust the polarization direction of the light entering and exiting the liquid crystal display panel, so as to improve the quality of the display screen of the display panel.
  • Fig. 4 is a cross-sectional view along BB' of another embodiment of the liquid crystal display panel shown in Fig. 2.
  • the fingerprint identification unit FP is disposed on the surface of the color filter substrate 11 facing the liquid crystal layer 30.
  • the fingerprint identification unit FP is arranged on the longitudinal matrix line 1142 of the second color filter layer 11, and the area where the longitudinal matrix line 1142 of the fingerprint identification unit FP is arranged is a cut-out area , That is, the fingerprint identification unit FP is directly arranged on the glass substrate 12.
  • the opening area 1142' is provided on the longitudinal matrix line 1142 of the first color filter layer 13 corresponding to the fingerprint identification unit FP.
  • a filter film F is provided on a side surface of the fingerprint identification unit FP that receives the reflected light of the fingerprint.
  • this embodiment has all the beneficial effects of the embodiment in which the fingerprint identification unit FP is disposed on the array substrate 20.
  • the fingerprint identification unit FP of this embodiment is arranged above the liquid crystal layer 30, and the fingerprint reflected light does not need to pass through The liquid crystal layer 30 can reach the fingerprint identification unit FP, which eliminates the interference of the liquid crystal layer 30 on the reflected light of the fingerprint, and can further improve the fingerprint identification accuracy of the fingerprint identification unit FP.
  • FIG. 5 is a partial enlarged view of area A of another embodiment of the liquid crystal display panel shown in FIG. 1, and FIG. 6 is FIG. 5.
  • FIG. 5 is a partial enlarged view of area A of another embodiment of the liquid crystal display panel shown in FIG. 1, and FIG. 6 is FIG. 5.
  • FIG. 5 is a partial enlarged view of area A of another embodiment of the liquid crystal display panel shown in FIG. 1, and FIG. 6 is FIG. 5.
  • FIG. 5 is a partial enlarged view of area A of another embodiment of the liquid crystal display panel shown in FIG. 1, and FIG. 6 is FIG. 5.
  • FIG. 5 is a partial enlarged view of area A of another embodiment of the liquid crystal display panel shown in FIG. 1, and FIG. 6 is FIG. 5.
  • FIG. 5 is a partial enlarged view of area A of another embodiment of the liquid crystal display panel shown in FIG. 1, and FIG. 6 is FIG. 5.
  • FIG. 5 is a partial enlarged view of area A of another embodiment of the liquid crystal display panel shown in FIG. 1, and FIG. 6 is
  • this embodiment only adjusts the spatial position of the fingerprint identification unit FP, other structural features are the same as the above embodiments, and the principle is to improve the fingerprint identification accuracy of the fingerprint identification unit FP.
  • the above is the same as the above embodiment. Therefore, this embodiment has the beneficial effects of the above embodiments.
  • Fig. 7 is a cross-sectional view along B-B' of another embodiment of the liquid crystal display panel shown in Fig. 5.
  • the vertical projection area of the fingerprint identification unit FP on the black matrix 114 is located on the horizontal matrix line 1141.
  • the fingerprint recognition unit FP is disposed on the horizontal matrix line 1141 of the second color filter layer 11, and the area where the horizontal matrix line 1142 of the fingerprint recognition unit FP is disposed is a hollow area , That is, the fingerprint identification unit FP is directly arranged on the glass substrate 12.
  • a filter film F is provided on a side surface of the fingerprint identification unit FP that receives the reflected light of the fingerprint.
  • this embodiment has all the beneficial effects of the embodiment in which the fingerprint identification unit FP is disposed on the array substrate 20.
  • the fingerprint identification unit FP of this embodiment is arranged above the liquid crystal layer 30, and the fingerprint reflected light does not need to pass through The liquid crystal layer 30 can reach the fingerprint identification unit FP, which eliminates the interference of the liquid crystal layer 30 on the reflected light of the fingerprint, and can further improve the fingerprint identification accuracy of the fingerprint identification unit FP.
  • the liquid crystal display panel provided by the embodiments of the present application includes a color filter substrate with two upper and lower color filter layers, and the fingerprint recognition unit is arranged on the lower side of the color filter substrate, and the upper layer color filter is used.
  • the layer shields the large-angle fingerprint reflection light, improves the "signal-to-noise ratio" of the fingerprint reflection light directed to the fingerprint identification unit, and further improves the accuracy of fingerprint identification.
  • the liquid crystal display device includes the liquid crystal display panel provided in the above embodiment, and a backlight that is arranged on the back side of the liquid crystal display panel and provides a backlight for the liquid crystal display panel. Module. Because the liquid crystal display device provided in this embodiment includes the liquid crystal display panel provided in the above embodiment, it has the following beneficial effects: the liquid crystal display device uses a color film substrate with two upper and lower color filter layers to reflect fingerprints at a large angle. The light is shielded to increase the "signal-to-noise ratio" of the fingerprint reflected light directed to the fingerprint identification unit, thereby increasing the accuracy of fingerprint identification by the fingerprint identification unit. Therefore, the liquid crystal display device has an excellent fingerprint identification capability.

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  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
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  • Crystallography & Structural Chemistry (AREA)
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  • Image Input (AREA)

Abstract

本申请提供一种液晶显示面板及液晶显示装置，所述液晶显示面板包括彩膜基板、与所述彩膜基板相对设置的阵列基板、以及设置于所述彩膜基板与所述阵列基板之间液晶层，所述彩膜基板包括上下两层彩色滤光层，且上下两层所述彩色滤光层的位置一一对应、颜色对应相同，所述彩膜基板与所述阵列基板之间设置有指纹识别单元；在进行指纹识别时，上层彩色滤光层可以遮挡大角度指纹反射光，提高射向指纹识别单元的指纹反射光的"信噪比"，从而提高指纹识别精度。本申请提供的液晶显示装置包含上述液晶显示面板。

Description

液晶显示面板及液晶显示装置
本申请要求于2019年12月13日提交中国专利局、申请号为201911289008.3、发明名称为“液晶显示面板及液晶显示装置”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及显示技术领域，尤其涉及液晶显示面板及液晶显示装置。
 背景技术
光学指纹识别是最早出现的一种指纹识别技术，早期的光学指纹识别技术由于需要较为庞大的光路系统，因此多用于门禁、打卡机等体型较大的设备上。近年来，为了保护个人隐私和财务安全，指纹识别技术被逐渐应用于手机、平板电脑等便携显示设备中。但由于这些便携显示设备的体积较小，传统的光学指纹识别技术无法满足需求，因此开发出了电容式指纹识别技术。
电容式指纹识别技术虽然适用于体积较小的设备中，但是该技术无法集成于显示屏的内部，需要占据独立的区域，因此不再适用于日益兴起的“全面屏”显示设备中。而光学指纹识别技术是利用指纹反射光来识别指纹特征的技术，反射光可以穿透透明的显示屏，到达显示屏的内部，因此，可以将光学指纹识别模块集成于显示屏的显示区域，有利于手机等设备的“全面屏”设计。
但是，将光学指纹识别模块集成于液晶显示面板中一直存在较多问题。由于液晶显示面板需要背光板提供光源，经指纹反射的背光会在指纹识别区域产生较多的干扰信号，主要表现为出现大量大角度反射光射向指纹识别模块。而指纹识别模块识别指纹的精度受“信噪比”的影响，所谓“信噪比”是指小角度反射光和大角度反射光的比值，当出现大量的大角度反射光射向指纹识别模块时，会造成“信噪比”降低，指纹识别精度下降，甚至无法识别指纹的问题。
 技术问题
集成于液晶显示面板中的光学指纹识别模块，受大角度指纹反射光的影响，其“信噪比”较低，指纹识别精度低下。
 技术解决方案
为了解决上述技术问题，本申请提供的技术方案如下：
本申请提供一种液晶显示面板，包括：
彩膜基板，所述彩膜基板包括上下两层彩色滤光层，且上下两层所述彩色滤光层的位置一一对应、颜色对应相同；
阵列基板，与所述彩膜基板相对设置；以及
液晶层，设置于所述彩膜基板与所述阵列基板之间；
所述彩膜基板与所述阵列基板之间设置有指纹识别单元，所述指纹识别单元通过接收穿过所述彩膜基板的指纹反射光，识别指纹特征。
在本申请的液晶显示面板中，每层所述彩色滤光层分别包括多个彩色滤光块，所述彩色滤光块之间设置有黑色矩阵，所述黑色矩阵用于防止穿过相邻两个所述彩色滤光块的光线相互干扰。
在本申请的液晶显示面板中，沿所述液晶显示面板的厚度方向，所述指纹识别单元的位置与所述黑色矩阵的位置对应；
所述黑色矩阵与所述指纹识别单元垂直对应的区域为开孔区，以保证光线通过所述开孔区射向所述指纹识别单元。
在本申请的液晶显示面板中，所述彩膜基板包括玻璃基板、设置于所述玻璃基板上表面的第一彩色滤光层和设置于所述玻璃基板下表面的第二彩色滤光层，所述第一彩色滤光层与所述第二彩色滤光层的位置一一对应、颜色对应相同。
在本申请的液晶显示面板中，所述第一彩色滤光层和所述第二彩色滤光层分别包括红色滤光块、绿色滤光块和蓝色滤光块。
在本申请的液晶显示面板中，所述黑色矩阵包括横向矩阵线和纵向矩阵线，所述横向矩阵线和所述纵向矩阵线将所述彩色滤光层划分为多个滤光区，所述彩色滤光块填充在所述滤光区中。
在本申请的液晶显示面板中，所述指纹识别单元设置于所述阵列基板的朝向所述液晶层的表面上。
在本申请的液晶显示面板中，所述指纹识别单元在所述黑色矩阵上的垂直投影区位于所述横向矩阵线上。
在本申请的液晶显示面板中，所述指纹识别单元在所述黑色矩阵上的垂直投影区位于所述纵向矩阵线上。
在本申请的液晶显示面板中，述指纹识别单元在所述黑色矩阵上的垂直投影区与所述彩色滤光块并行排列。
在本申请的液晶显示面板中，所述指纹识别单元设置于所述彩膜基板的朝向所述液晶层的表面上。
在本申请的液晶显示面板中，所述指纹识别单元设置于所述横向矩阵线上。
在本申请的液晶显示面板中，所述指纹识别单元设置于所述纵向矩阵线上。
在本申请的液晶显示面板中，所述指纹识别单元设置于所述纵向矩阵线上，且与所述彩色滤光块并排设置。
在本申请的液晶显示面板中，所述指纹识别单元的接收光线的一侧表面设置有滤光膜，所述滤光膜用于将射向所述指纹识别单元的光线过滤为单色光。
本申请还提供了一种液晶显示装置，包括如上所述的液晶显示面板；以及
背光模组，设置于所述液晶显示面板的背侧，用于为所述液晶显示面板提供背光。
在本申请的液晶显示装置中，在所述液晶显示面板中，每层所述彩色滤光层分别包括多个彩色滤光块，所述彩色滤光块之间设置有黑色矩阵，所述黑色矩阵用于防止穿过相邻两个所述彩色滤光块的光线相互干扰。
在本申请的液晶显示装置中，沿所述液晶显示面板的厚度方向，所述指纹识别单元的位置与所述黑色矩阵的位置对应，所述黑色矩阵与所述指纹识别单元垂直对应的区域为开孔区。
在本申请的液晶显示装置中，所述彩膜基板包括玻璃基板、设置于所述玻璃基板上表面的第一彩色滤光层和设置于所述玻璃基板下表面的第二彩色滤光层，所述第一彩色滤光层与所述第二彩色滤光层的位置一一对应、颜色对应相同。
在本申请的液晶显示装置中，所述黑色矩阵包括横向矩阵线和纵向矩阵线，所述横向矩阵线和所述纵向矩阵线将所述彩色滤光层划分为多个滤光区，所述彩色滤光块填充在所述滤光区中；
所述指纹识别单元与所述横向矩阵线对应设置；或
所述指纹识别单元于所述纵向矩阵线对应设置。
 有益效果
本申请提供的液晶显示面板及液晶显示装置，包括具有上下两层彩色滤光层的彩膜基板，并将指纹识别单元设置于所述彩膜基板的下侧，在进行指纹识别时，上层彩色滤光层可以遮挡大角度指纹反射光，提高射向指纹识别单元的指纹反射光的“信噪比”，从而提高指纹识别精度。
 附图说明
为了更清楚地说明实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单介绍，显而易见地，下面描述中的附图仅仅是申请的一些实施例，对于本领域普通技术人员来讲，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是本申请实施例提供的液晶显示面板的俯视图；
图2是图1所示的液晶显示面板的一种实施方式的区域A的局部放大图；
图3是图2所示的液晶显示面板的一种实施方式沿B-B’的截面图，在该实施方式中，指纹识别单元设置于阵列基板上；
图4是图2所示的液晶显示面板的另一种实施方式沿B-B’的截面图，在该实施方式中，指纹识别单元设置于彩膜基板上；
图5是图1所示的液晶显示面板的另一种实施方式的区域A的局部放大图；
图6是图5所示的液晶显示面板的一种实施方式沿B-B’的截面图，在该实施方式中，指纹识别单元设置于阵列基板上；
图7是图5所示的液晶显示面板的另一种实施方式沿B-B’的截面图，在该实施方式中，指纹识别单元设置于彩膜基板上。
 本发明的实施方式
以下各实施例的说明是参考附加的图示，用以例示本申请可用以实施的特定实施例。本申请所提到的方向用语，例如[上]、[下]、[前]、[后]、[左]、[右]、[内]、[外]、[侧面]等，仅是参考附加图式的方向。因此，使用的方向用语是用以说明及理解本申请，而非用以限制本申请。在图中，结构相似的单元是用以相同标号表示。
本申请实施例提供了一种液晶显示面板，所述液晶显示面板的彩膜基板包含上下两层彩色滤光层，指纹识别单元设置于所述彩膜基板的下侧，利用上层彩色滤光层遮挡大角度指纹反射光，提高射向指纹识别单元的指纹反射光的“信噪比”，从而提高指纹识别精度。本申请实施例提供的液晶显示面板中，指纹识别单元集成于显示面板内部，无需设置单独的指纹识别区域，可以实现“全面屏”设备的指纹识别。
如图1所示，是本申请实施例提供的液晶显示面板的平面结构示意图，所述液晶显示面板包含若干子像素单元1，应当理解的是，每一个所述子像素单元1分别对应所述液晶显示面板的彩膜基板上的一个彩色滤光单元，所述彩膜基板可以包括具有多种颜色的彩色滤光单元，从而使所述液晶显示面板实现彩色显示。
如图2和图3所示，其中图2是图1所示的液晶显示面板的一种实施方式的区域A的局部放大图，图3是图2所示的液晶显示面板的一种实施方式沿B-B’的截面图。该实施例提供的液晶显示面板包括彩膜基板10、与所述彩膜基板10相对设置的阵列基板20、以及设置于所述彩膜基板10和所述阵列基板20之间的液晶层30，所述液晶层30中填充液晶LC。
所述彩膜基板10包括上下两层彩色滤光层，且上下两层所述彩色滤光层的位置一一对应、颜色对应相同，所述彩膜基板10的彩色滤光层包括多种颜色，通过多种颜色的组合使所述液晶显示面板实现彩色显示。
具体地，所述彩膜基板10包括玻璃基板12、设置于所述玻璃基板12的上表面的第一彩色滤光层13、以及设置于所述玻璃基板12下表面的第二彩色滤光层11。所述第一彩色滤光层13和所述第二彩色滤光层11分别包含具有多种不同颜色的彩色滤光块110。沿所述液晶显示面板的厚度方向，即图3中所示的第一方向D，所述第一彩色滤光层13的彩色滤光块与所述第二彩色滤光层11的彩色滤光块的位置一一对应，并且沿所述第一方向D上下对应的所述第一彩色滤光层的彩色滤光块和所述第二彩色滤光层的彩色滤光块具有相同的颜色。沿所述第一方向D上下对应的每组所述彩色滤光块110分别形成一个所述彩色滤光单元。
进一步地，所述第一彩色滤光层13和所述第二彩色滤光层11分别包括红色滤光块111、绿色滤光块112和蓝色滤光块113。沿所述第一方向D，与所述第二彩色滤光层11的所述红色滤光块111相对应的所述第一彩色滤光层13的彩色滤光块也为红色滤光块111，与所述第二彩色滤光层11的所述绿色滤光块112相对应的所述第一彩色滤光层13的彩色滤光块也为绿色滤光块112，与所述第二彩色滤光层11的所述蓝色滤光块113相对应的所述第一彩色滤光层13的彩色滤光块也为蓝色滤光块113。
进一步地，所述第一彩色滤光层13的所述彩色滤光块110之间及所述第二彩色滤光层11的所述彩色滤光块110之间分别设置有黑色矩阵114，所述黑色矩阵114用于防止穿过相邻两个所述彩色滤光块110的光线相互干扰。所述黑色矩阵114包括用于将所述彩色滤光块110分割成行的横向矩阵线1141和用于将所述彩色滤光块110分割成列的纵向矩阵线1142，即所述横向矩阵线1141和所述纵向矩阵线1142将所述第一彩色滤光层13和所述第二彩色滤光层11划分为多个滤光区，所述彩色滤光块110填充在所述滤光区中。
所述阵列基板20与所述彩膜基板10相对设置，并且在所述阵列基板20和所述彩膜基板10之间填充所述液晶层30。所述阵列基板20中设置有扫描线、数据线、像素电极、薄膜晶体管等功能元件，所述阵列基板20用于控制所述液晶层30中的液晶LC的偏转，以实现所述液晶显示面板显示画面的功能。
所述彩膜基板10与所述阵列基板20之间设置有指纹识别单元FP，所述指纹识别单元FP通过接收被指纹反射，并穿过所述彩膜基板的指纹反射光，识别指纹特征。可选地，所述指纹识别单元FP可以是光电传感器，在进行指纹识别时，所述指纹识别单元FP接收到指纹反射的光线后，将该光线转换为电信号，并经算法处理单元计算得到指纹结构特征，实现指纹识别。需要说明的是，本实施例提供的液晶显示面板可以包括多个与所述算法处理单元电性连接的指纹识别单元FP，每一个所述指纹识别单元FP分别识别某一局部区域内的指纹特征，所述算法处理单元通过将多个所述指纹识别单元FP识别的指纹信号整合形成完整的指纹特征。
所述指纹识别单元FP在所述第一彩色滤光层13或所述第二彩色滤光层11上的垂直投影区位于所述纵向矩阵线1142上。沿所述第一方向D，与所述指纹识别单元FP对应的所述纵向矩阵线1142的区域为开孔区1142’，并且所述第一彩色滤光层13和所述第二彩色滤光层11上均设置所述开孔区1142’，从而保证指纹反射光可以通过所述开孔区1142’射向所述指纹识别单元FP。
本实施例通过将所述指纹识别单元FP设置于所述彩膜基板10和所述阵列基板20之间，使经过指纹反射的光线需首先穿过所述彩膜基板10才能到达所述指纹识别单元FP。利用所述彩膜基板10的彩色滤光层，尤其是所述第一彩色滤光层13，遮挡大角度指纹反射光，使所述指纹识别单元FP接收到的指纹反射光多数来自于所述指纹识别单元FP上方的局部小范围区域，即接收更多的小角度指纹反射光，提高指纹反射光的“信噪比”，从而提升所述指纹识别单元FP的识别精度。
根据本申请一实施例，如图3所示，所述指纹识别单元FP设置于所述阵列基板20的朝向所述液晶层30的表面上，所述第一彩色滤光层13和所述第二彩色滤光层11沿所述第一方向D与所述指纹识别单元FP对应的区域为所述开孔区1142’。所述开孔区1142’可以允许所述指纹识别单元FP正上方的指纹反射光射向所述指纹识别单元。
可选地，所述开孔区1142’位于相邻的所述蓝色滤光块113和所述红色滤光块111之间。所述液晶显示面板进行指纹识别时，显示单色蓝光画面，所述液晶显示面板发出的蓝光经指纹反射后，一部分经所述开孔区1142’射向所述指纹识别单元FP，一部分经所述蓝色滤光块113折射后射向所述指纹识别单元FP，还有一部分射向所述黑色矩阵114、所述红色滤光块111和所述绿色滤光块112的指纹反射光被遮挡而无法穿透所述彩膜基板10，从而保证所述指纹识别单元FP接收到的指纹反射光为所述指纹识别单元上方小范围区域的指纹的反射光，排除了其它区域指纹反射光的干扰，提高指纹识别精度。同理，所述液晶显示面板进行指纹识别时也可以显示单色红光画面，指纹反射光的传播原理与上述相同，此处不再赘述。
另外可选地，所述开孔区1142’也可以位于相邻的所述红色滤光块111和所述绿色滤光块112之间，或位于相邻的所述绿色滤光块112和所述蓝色滤光块113之间。对于所述开孔区1142’位于相邻的所述红色滤光块111和所述绿色滤光块112之间的实施方式，所述液晶显示面板进行指纹识别时，可以显示单色红光画面或单色绿光画面，其指纹反射光的传播原理与上述相同。对于所述开孔区1142’位于相邻的所述绿色滤光块112和所述蓝色滤光块113之间的实施方式，所述液晶显示面板进行指纹识别时，可以显示单色绿光画面或单色蓝光画面，其指纹反射光的传播原理与上述相同，此处均不再赘述。
可选地，所述指纹识别单元FP的接收指纹反射光的一侧表面设置有滤光膜F，所述滤光膜F用于将射向所述指纹识别单元FP的指纹反射光过滤为单色光，例如，所述滤光膜F可以将指纹反射光过滤为单色蓝光或单色绿光或单色红光。应当理解的是，对于所述指纹识别单元FP表面设置所述滤光膜F的实施方式，所述液晶显示面板进行指纹识别时，可以显示彩色画面。以所述开孔区1142’位于相邻的所述蓝色滤光块113和所述红色滤光块111之间，且所述滤光膜F将指纹反射光过滤为单色蓝光为例进行说明：一部分经指纹反射的彩色光通过所述开孔区1142’射向所述指纹识别单元FP，并被所述滤光膜F过滤为单色蓝光；一部分经指纹反射的彩色光经过所述蓝色滤光块113的过滤和折射作用，以单色蓝光的形式射向所述指纹识别单元FP；另外一部分经指纹反射的彩色光经过所述红色滤光块111或所述绿色滤光块112的过滤和折射作用，以单色红光或单色绿光的形式射向所述指纹识别单元FP，而被所述过滤膜F阻挡。从而保证所述指纹识别单元FP接收的指纹反射光来自于其上方的小范围区域，保证了指纹识别单元的指纹识别精度。
可选地，本实施例提供的所述液晶显示面板还包括设置于所述阵列基板20下侧的下偏光片40、设置于所述彩膜基板10上侧的上偏光片50、以及设置于所述上偏光片50上侧的玻璃盖板60。所述上偏光片50和所述下偏光片40用于调整进出所述液晶显示面板的光线的偏振方向，以提高显示面板显示画面的质量。
根据本申请一实施例，如图2和图4所示，其中图4是图2所示的液晶显示面板的另一种实施方式沿B-B’的截面图，在此种实施方式中，所述指纹识别单元FP设置于所述彩膜基板11的朝向所述液晶层30的表面上。具体地，所述指纹识别单元FP设置于所述第二彩色滤光层11的所述纵向矩阵线1142上，且设置所述指纹识别单元FP的所述纵向矩阵线1142的区域为挖空区，即所述指纹识别单元FP直接设置于所述玻璃基板12上。沿所述第一方向D，与所述指纹识别单元FP相对应的所述第一彩色滤光层13的所述纵向矩阵线1142上设置所述开孔区1142’。可选地，所述指纹识别单元FP的接收指纹反射光的一侧表面设置有滤光膜F。
需要说明的是，本实施例与将所述指纹识别单元FP设置于所述阵列基板20上的实施例的区别仅在于所述指纹识别单元FP的设置位置不同，其它结构特征完全相同。因此，本实施例具备将所述指纹识别单元FP设置于所述阵列基板20上的实施例的一切有益效果。另外，与将所述指纹识别单元FP设置于所述阵列基板20上的实施例相比，本实施例的所述指纹识别单元FP设置于所述液晶层30的上方，指纹反射光无需穿过所述液晶层30即可到达所述指纹识别单元FP，消除了所述液晶层30对指纹反射光的干扰，可进一步提升所述指纹识别单元FP的指纹识别精度。
根据本申请一实施例，如图1、图5和图6所示，其中图5是图1所示的液晶显示面板的另一种实施方式的区域A的局部放大图，图6是图5所示的液晶显示面板的一种实施方式沿B-B’的截面图。在本实施例中，所述指纹识别单元FP在所述黑色矩阵114上的垂直投影区位于所述横向矩阵线1141上。具体地，所述指纹识别单元FP设置于所述阵列基板20的朝向所述液晶层30的表面上。可选地，所述指纹识别单元FP的接收指纹反射光的一侧表面设置有滤光膜F。与以上实施例相比，本实施例仅在所述指纹识别单元FP的空间位置上进行调整，其它结构特征与以上实施例均相同，并且在实现提高所述指纹识别单元FP识别指纹精度是原理上与以上实施例也相同。因此，本实施例具备以上实施例的有益效果。
根据本申请一实施例，如图5和图7所示，其中，图7是图5所示的液晶显示面板的另一种实施方式沿B-B’的截面图。在本实施例中，所述指纹识别单元FP在所述黑色矩阵114上的垂直投影区位于所述横向矩阵线1141上。具体地，所述指纹识别单元FP设置于所述第二彩色滤光层11的所述横向矩阵线1141上，且设置所述指纹识别单元FP的所述横向矩阵线1142的区域为挖空区，即所述指纹识别单元FP直接设置于所述玻璃基板12上。可选地，所述指纹识别单元FP的接收指纹反射光的一侧表面设置有滤光膜F。
需要说明的是，本实施例与上述将所述指纹识别单元FP设置于所述阵列基板20上的实施例的区别仅在于所述指纹识别单元FP的设置位置不同，其它结构特征完全相同。因此，本实施例具备将所述指纹识别单元FP设置于所述阵列基板20上的实施例的一切有益效果。另外，与将所述指纹识别单元FP设置于所述阵列基板20上的实施例相比，本实施例的所述指纹识别单元FP设置于所述液晶层30的上方，指纹反射光无需穿过所述液晶层30即可到达所述指纹识别单元FP，消除了所述液晶层30对指纹反射光的干扰，可进一步提升所述指纹识别单元FP的指纹识别精度。
综上所述，本申请实施例提供的液晶显示面板，包括具有上下两层彩色滤光层的彩膜基板，并将指纹识别单元设置于所述彩膜基板的下侧，利用上层彩色滤光层遮挡大角度指纹反射光，提高射向所述指纹识别单元的指纹反射光的“信噪比”，进而提高指纹识别精度。
本申请另一实施例提供了一种液晶显示装置，所述液晶显示装置包括上述实施例提供的液晶显示面板，以及设置于所述液晶显示面板背侧并为所述液晶显示面板提供背光的背光模组。本实施例提供的液晶显示装置因为包含了上述实施例提供的液晶显示面板，因此具有以下有益效果：所述液晶显示装置利用具有上下两层彩色滤光层的彩膜基板，对大角度指纹反射光进行遮挡，以提高射向所述指纹识别单元的指纹反射光的“信噪比”，进而提高所述指纹识别单元识别指纹的精度，因此，所述液晶显示装置具有优异的指纹识别能力。
综上所述，虽然本申请以具体实施例揭露如上，但上述实施例并非用以限制本申请，本领域的普通技术人员，在不脱离本申请的精神和范围内，均可作各种更动与润饰，因此本申请的保护范围以权利要求界定的范围为准。

Claims (20)

  1. 一种液晶显示面板，其包括：
    彩膜基板，所述彩膜基板包括上下两层彩色滤光层，且上下两层所述彩色滤光层的位置一一对应、颜色对应相同；
    阵列基板，与所述彩膜基板相对设置；以及
    液晶层，设置于所述彩膜基板与所述阵列基板之间；
    所述彩膜基板与所述阵列基板之间设置有指纹识别单元，所述指纹识别单元通过接收穿过所述彩膜基板的指纹反射光，识别指纹特征。
  2. 根据权利要求1所述的液晶显示面板，其中，每层所述彩色滤光层分别包括多个彩色滤光块，所述彩色滤光块之间设置有黑色矩阵，所述黑色矩阵用于防止穿过相邻两个所述彩色滤光块的光线相互干扰。
  3. 根据权利要求2所述的液晶显示面板，其中，沿所述液晶显示面板的厚度方向，所述指纹识别单元的位置与所述黑色矩阵的位置对应；
    所述黑色矩阵与所述指纹识别单元垂直对应的区域为开孔区，以保证光线通过所述开孔区射向所述指纹识别单元。
  4. 根据权利要求3所述的液晶显示面板，其中，所述彩膜基板包括玻璃基板、设置于所述玻璃基板上表面的第一彩色滤光层和设置于所述玻璃基板下表面的第二彩色滤光层，所述第一彩色滤光层与所述第二彩色滤光层的位置一一对应、颜色对应相同。
  5. 根据权利要求4所述的液晶显示面板，其中，所述第一彩色滤光层和所述第二彩色滤光层分别包括红色滤光块、绿色滤光块和蓝色滤光块。
  6. 根据权利要求3所述的液晶显示面板，其中，所述黑色矩阵包括横向矩阵线和纵向矩阵线，所述横向矩阵线和所述纵向矩阵线将所述彩色滤光层划分为多个滤光区，所述彩色滤光块填充在所述滤光区中。
  7. 根据权利要求6所述的液晶显示面板，其中，所述指纹识别单元设置于所述阵列基板的朝向所述液晶层的表面上。
  8. 根据权利要求7所述的液晶显示面板，其中，所述指纹识别单元在所述黑色矩阵上的垂直投影区位于所述横向矩阵线上。
  9. 根据权利要求7所述的液晶显示面板，其中，所述指纹识别单元在所述黑色矩阵上的垂直投影区位于所述纵向矩阵线上。
  10. 根据权利要求9所述的液晶显示面板，其中，所述指纹识别单元在所述黑色矩阵上的垂直投影区与所述彩色滤光块并行排列。
  11. 根据权利要求6所述的液晶显示面板，其中，所述指纹识别单元设置于所述彩膜基板的朝向所述液晶层的表面上。
  12. 根据权利要求11所述的液晶显示面板，其中，所述指纹识别单元设置于所述横向矩阵线上。
  13. 根据权利要求11所述的液晶显示面板，其中，所述指纹识别单元设置于所述纵向矩阵线上。
  14. 根据权利要求13所述的液晶显示面板，其中，所述指纹识别单元设置于所述纵向矩阵线上，且与所述彩色滤光块并排设置。
  15. 根据权利要求1所述的液晶显示面板，其中，所述指纹识别单元的接收光线的一侧表面设置有滤光膜，所述滤光膜用于将射向所述指纹识别单元的光线过滤为单色光。
  16. 一种液晶显示装置，其包括：权利要求1所述的液晶显示面板；以及
    背光模组，设置于所述液晶显示面板的背侧，用于为所述液晶显示面板提供背光。
  17. 根据权利要求16所述的液晶显示装置，其中，在所述液晶显示面板中，每层所述彩色滤光层分别包括多个彩色滤光块，所述彩色滤光块之间设置有黑色矩阵，所述黑色矩阵用于防止穿过相邻两个所述彩色滤光块的光线相互干扰。
  18. 根据权利要求17所述的液晶显示装置，其中，沿所述液晶显示面板的厚度方向，所述指纹识别单元的位置与所述黑色矩阵的位置对应，所述黑色矩阵与所述指纹识别单元垂直对应的区域为开孔区。
  19. 根据权利要求18所述的液晶显示装置，其中，所述彩膜基板包括玻璃基板、设置于所述玻璃基板上表面的第一彩色滤光层和设置于所述玻璃基板下表面的第二彩色滤光层，所述第一彩色滤光层与所述第二彩色滤光层的位置一一对应、颜色对应相同。
  20. 根据权利要求19所述的液晶显示装置，其中，所述黑色矩阵包括横向矩阵线和纵向矩阵线，所述横向矩阵线和所述纵向矩阵线将所述彩色滤光层划分为多个滤光区，所述彩色滤光块填充在所述滤光区中；
    所述指纹识别单元与所述横向矩阵线对应设置；或
    所述指纹识别单元于所述纵向矩阵线对应设置。
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