WO2020191909A1 - 液晶显示面板 - Google Patents

液晶显示面板 Download PDF

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Publication number
WO2020191909A1
WO2020191909A1 PCT/CN2019/087908 CN2019087908W WO2020191909A1 WO 2020191909 A1 WO2020191909 A1 WO 2020191909A1 CN 2019087908 W CN2019087908 W CN 2019087908W WO 2020191909 A1 WO2020191909 A1 WO 2020191909A1
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WIPO (PCT)
Prior art keywords
pixel
display panel
liquid crystal
crystal display
sub
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PCT/CN2019/087908
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English (en)
French (fr)
Inventor
刘凡成
Original Assignee
武汉华星光电技术有限公司
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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 US16/495,181 priority Critical patent/US11360340B2/en
Publication of WO2020191909A1 publication Critical patent/WO2020191909A1/zh

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Classifications

    • 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
    • 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
    • G02F1/13338—Input devices, e.g. touch panels
    • 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
    • G02F2201/00—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00
    • G02F2201/52—RGB geometrical arrangements

Definitions

  • the present invention relates to the technical field of display panels, and in particular to a liquid crystal display panel.
  • the prior art proposes a display panel.
  • the display panel includes an RGBW unit 100.
  • the RGBW unit 100 includes a red sub-pixel 101, a blue sub-pixel 102, and a green sub-pixel.
  • the RGBW unit 102 adopts a horizontal layout design, that is, after the fingerprint recognition unit 105 and the white sub-pixel 104 are arranged vertically, the whole is arranged horizontally with the red sub-pixel 101, blue sub-pixel 102, and green sub-pixel 103.
  • this design makes the distance between laterally adjacent fingerprint identification units 103 larger than the lateral width of 3 sub-pixels, and the distance is too large to reduce the accuracy of fingerprint identification.
  • there are RGB three-color sub-pixels between laterally adjacent fingerprint identification units 103 which will increase interference with optical signal and noise.
  • optical fingerprints in the visible light band generally use light less than 580nm for fingerprint recognition. If the backlight light source is directly used for fingerprint recognition, it will interfere with optical signal noise, which is not conducive to fingerprint recognition.
  • the embodiment of the present invention provides a liquid crystal display panel to solve the problems of high interference light signal noise and low fingerprint recognition accuracy of the existing display panel.
  • the embodiment of the present invention provides a liquid crystal display panel, which includes a plurality of pixel units arranged in an array and a plurality of fingerprint identification units arranged in one-to-one correspondence with the plurality of pixel units;
  • Each pixel unit includes four sub-pixels arranged in two rows and two columns, and the four sub-pixels include one white sub-pixel; the projection of each fingerprint recognition unit in the direction perpendicular to the liquid crystal display panel covers its corresponding pixel unit Part of the white sub-pixel.
  • all the sub-pixels have the same size and shape; the distance between two adjacent fingerprint recognition units in the same row is less than or equal to the sum of the width of one sub-pixel and the width of the light-shielding gap on both sides of one sub-pixel.
  • the four sub-pixels further include a red sub-pixel, a blue sub-pixel and a green sub-pixel;
  • the red sub-pixel and the white sub-pixel are arranged diagonally, and the blue sub-pixel and the green sub-pixel are arranged diagonally.
  • a filter layer is provided on a side of each white sub-pixel away from its corresponding fingerprint recognition unit.
  • each white sub-pixel is provided with a hollow part, and the hollow part is filled with a filter material to form a filter layer.
  • each fingerprint recognition unit in the direction perpendicular to the liquid crystal display panel covers its corresponding part of the filter layer, or the projection of each fingerprint recognition unit in the direction perpendicular to the liquid crystal display panel completely covers its corresponding filter.
  • Layer, or the projection of each fingerprint identification unit in the direction perpendicular to the liquid crystal display panel and its corresponding filter layer have no intersection.
  • the material of the filter layer is a photoresist for filtering light with a wavelength above 580 nm.
  • the liquid crystal display panel further includes an array substrate and a cover plate arranged oppositely;
  • the pixel unit is arranged on a side of the cover plate facing the array substrate, and the fingerprint identification unit is arranged between the pixel unit and the array substrate.
  • the fingerprint identification unit is a photosensitive sensor.
  • the embodiment of the present invention also provides a liquid crystal display panel, which includes a plurality of pixel units arranged in an array and a plurality of fingerprint identification units arranged in one-to-one correspondence with the plurality of pixel units;
  • Each pixel unit includes four sub-pixels arranged in two rows and two columns, and the four sub-pixels include a white sub-pixel; there is a light-shielding gap between adjacent sub-pixels, and each fingerprint recognition unit is positioned perpendicular to the liquid crystal display panel.
  • the above projection covers part of the white sub-pixels in the corresponding pixel unit and the light shielding gap.
  • all the sub-pixels have the same size and shape; the distance between two adjacent fingerprint recognition units in the same row is less than or equal to the sum of the width of one sub-pixel and the width of the light-shielding gap on both sides of one sub-pixel.
  • the four sub-pixels further include a red sub-pixel, a blue sub-pixel and a green sub-pixel;
  • the red sub-pixel and the white sub-pixel are arranged diagonally, and the blue sub-pixel and the green sub-pixel are arranged diagonally.
  • a filter layer is provided on a side of each white sub-pixel away from its corresponding fingerprint recognition unit.
  • each white sub-pixel is provided with a hollow part, and the hollow part is filled with a filter material to form a filter layer.
  • each fingerprint recognition unit in the direction perpendicular to the liquid crystal display panel covers its corresponding part of the filter layer, or the projection of each fingerprint recognition unit in the direction perpendicular to the liquid crystal display panel completely covers its corresponding filter.
  • Layer, or the projection of each fingerprint identification unit in the direction perpendicular to the liquid crystal display panel and its corresponding filter layer have no intersection.
  • each fingerprint recognition unit in the direction perpendicular to the liquid crystal display panel covers its corresponding part of the filter layer, or the projection of each fingerprint recognition unit in the direction perpendicular to the liquid crystal display panel completely covers its corresponding filter.
  • Layer, or the projection of each fingerprint identification unit in the direction perpendicular to the liquid crystal display panel and its corresponding filter layer have no intersection.
  • the material of the filter layer is a photoresist for filtering light with a wavelength above 580 nm.
  • the liquid crystal display panel further includes an array substrate and a cover plate arranged oppositely;
  • the pixel unit is arranged on a side of the cover plate facing the array substrate, and the fingerprint identification unit is arranged between the pixel unit and the array substrate.
  • each pixel unit is correspondingly provided with a fingerprint recognition unit, and each pixel unit includes four sub-pixels arranged in two rows and two columns, and the projection of each fingerprint recognition unit in a direction perpendicular to the liquid crystal display panel Cover some of the white sub-pixels in the corresponding pixel unit to reduce the distance between adjacent fingerprint recognition units in the same line, reduce interference light signal noise, and improve fingerprint recognition accuracy; the projection of the fingerprint recognition unit in the direction perpendicular to the liquid crystal display panel It also covers the light-shielding gap to reduce the occlusion of the white sub-pixels by the fingerprint recognition unit, increase the light transmission of the white sub-pixels, and improve the light utilization rate; a filter layer is set to filter the interference light to further reduce the interference light signal noise.
  • FIG. 1 is a schematic diagram of the structure of an RGBW unit of a display panel in the prior art
  • FIG. 2 is a diagram of the positional relationship between the pixel unit and the fingerprint identification unit in the liquid crystal display panel provided by the embodiment of the present invention
  • FIG. 3 is a diagram of a positional relationship between a pixel unit and a filter layer in a liquid crystal display panel provided by an embodiment of the present invention
  • FIG. 4 is another positional relationship diagram of the pixel unit and the filter layer in the liquid crystal display panel provided by the embodiment of the present invention.
  • FIG. 5 is another positional relationship diagram of the pixel unit and the filter layer in the liquid crystal display panel provided by the embodiment of the present invention.
  • FIG. 6 is a reflection waveform diagram of a filter layer in a liquid crystal display panel provided by an embodiment of the present invention.
  • FIG. 7 is a schematic structural diagram of a liquid crystal display panel provided by an embodiment of the present invention.
  • the liquid crystal display panel provided by this embodiment includes a plurality of pixel units 10 arranged in an array and a plurality of fingerprint identification units 20 arranged in one-to-one correspondence with the plurality of pixel units 10.
  • the plurality of fingerprint identification units 20 may be photosensitive sensors.
  • Each pixel unit 10 includes four sub-pixels 11, and one of the four sub-pixels 11 is a white sub-pixel W, so that each fingerprint recognition unit corresponds to a white sub-pixel W.
  • the four sub-pixels 11 of each pixel unit 10 form a structure of two rows and two columns.
  • the shapes and sizes of the four sub-pixels 11 are completely the same, and the shape of each sub-pixel 11 is rectangular, so that the pixel unit 10 formed by the four sub-pixels 11 is rectangular.
  • the projection of each fingerprint identification unit 20 in the direction perpendicular to the liquid crystal display panel covers part of the white sub-pixels W in its corresponding pixel unit 10, that is, the projection of each fingerprint identification unit 20 in the direction perpendicular to the liquid crystal display panel corresponds to it
  • the white sub-pixels W partially overlap.
  • the fingerprint identification unit 20 may be rectangular, and the projection of each fingerprint identification unit 20 may cover the upper, middle or lower half of its corresponding white sub-pixel W, which is not specifically limited here.
  • the four sub-pixels 11 in the pixel unit 10 are arranged in two rows and two columns, and the fingerprint identification unit 20 and the white sub-pixel W are arranged correspondingly, so as to reduce the distance between the fingerprint identification units 20 adjacent to the same line and reduce the number of lines in the same line.
  • the number of sub-pixels between adjacent fingerprint identification units 20 reduces interference light signal noise and improves fingerprint identification accuracy.
  • each pixel unit 10 further includes a red sub-pixel R, a blue sub-pixel B, and a green sub-pixel G, that is, the other three sub-pixels 11 of the four sub-pixels 11 are red sub-pixels R, Blue sub-pixel B and green sub-pixel G.
  • the red sub-pixel R and the white sub-pixel W are arranged diagonally, and the blue sub-pixel B and the green sub-pixel G are arranged diagonally.
  • fingerprint recognition is performed by using light with a wavelength band below 580nm.
  • the white sub-pixel W is arranged adjacent to the blue sub-pixel B and the green sub-pixel G, and the white sub-pixel W is arranged far away from the red sub-pixel R to make the fingerprint
  • the recognition unit 20 can maximize the use of the light of the blue sub-pixel B and the green sub-pixel G, but is not easily affected by the light emission of the red sub-pixel R, thereby reducing interference light signal noise.
  • each fingerprint recognition unit 20 in the direction perpendicular to the liquid crystal display panel covers part of the white sub-pixels in its corresponding pixel unit 10. W and the light-shielding gap 12.
  • the light-shielding gap 12 is used for setting data lines and scan lines, and is a non-transparent area.
  • a light-shielding gap 12 is provided around each sub-pixel 11.
  • the projection of the fingerprint recognition unit 20 in the direction perpendicular to the liquid crystal display panel covers part of its corresponding part of the white sub-pixel W, and the other part covers the light-shielding gap 12 around the part of the white sub-pixel W, that is, a part of the fingerprint recognition unit 20 and the light shield
  • the gap 12 is arranged correspondingly, and the other part is arranged corresponding to a part of the white sub-pixels W.
  • the part of the white sub-pixels W blocked by the fingerprint recognition unit 20 is opaque, while the part of the white sub-pixels W that are not blocked can still transmit light. Therefore, while ensuring the size of the fingerprint recognition unit 20, the light shielding gap is used to reduce the fingerprint recognition unit 20 to block the white sub-pixel W, that is, to reduce the proportion of the fingerprint identification unit 20 in the opening area of the white sub-pixel W, thereby increasing the amount of light transmitted by the white sub-pixel W, increasing the amount of light that eventually reaches the fingerprint, thereby improving fingerprint recognition degree.
  • the distance between two fingerprint identification units 20 adjacent in the same row is less than or equal to the sum of the width of one sub-pixel 11 and the width of the light-shielding gap 12 on both sides of one sub-pixel 11.
  • the fingerprint recognition unit 20 is rectangular, and the projection of the fingerprint recognition unit 20 in the direction perpendicular to the liquid crystal display panel covers the upper half of the white sub-pixel W and the upper half of the white sub-pixel W.
  • the light-shielding gap 12 and the upper light-shielding gap 12 make the distance between two adjacent fingerprint recognition units 20 in the same row the width of one sub-pixel 11, thereby reducing the shielding of the white sub-pixel W while further reducing
  • the distance between two adjacent fingerprint identification units 20 in the same line effectively improves the accuracy of fingerprint identification.
  • the liquid crystal display panel further includes a filter layer 30.
  • a filter layer 30 is provided on a side of each white sub-pixel W away from the corresponding fingerprint identification unit 20.
  • the filter layer 30 may be provided on the entire white sub-pixel W, or only a part of the white sub-pixel W. 2 and 3, when the filter layer 30 is arranged on the entire white sub-pixel W, the projection of each fingerprint recognition unit 20 in the direction perpendicular to the liquid crystal display panel covers its corresponding part of the filter layer 30, namely The projection of the fingerprint identification unit 20 partially overlaps the filter layer 30. At this time, the white sub-pixel W is not used as a display pixel and is only turned on during fingerprint identification.
  • the filter layer 30 is arranged on part of the white sub-pixel W, as shown in FIG. 2 and FIG.
  • each fingerprint recognition unit 20 in the direction perpendicular to the liquid crystal display panel completely covers its corresponding filter layer 30, namely The fingerprint recognition unit 20 corresponds to the position of the filter layer 30.
  • the white sub-pixel W is not used as a display pixel and is only turned on during fingerprint recognition; or, as shown in FIG. 2 and FIG. 5, each fingerprint recognition unit 20 is vertically
  • the projection in the direction of the liquid crystal display panel and the corresponding filter layer 30 have no intersection, that is, the fingerprint recognition unit 20 does not correspond to the position of the filter layer 30, and the white sub-pixel W can be used as a display pixel.
  • each white sub-pixel W is provided with a hollow part, and the hollow part is filled with a filter material to form the filter layer 30.
  • the transparent materials in the opening area of the white sub-pixel W can be hollowed out to form a hollow portion, or only part of the transparent material in the opening area of the white sub-pixel W can be hollowed out to form a hollow out unit.
  • the hollow part is filled with a filter material to form the filter layer 30. 2 and 3, when the filter layer 30 is arranged in the entire opening area of the white sub-pixel W, the projection of each fingerprint recognition unit 20 in the direction perpendicular to the liquid crystal display panel covers its corresponding part of the filter layer 30, that is, the projection of the fingerprint recognition unit 20 partially overlaps with the filter layer 30. At this time, the white sub-pixel W is not used as a display pixel and is only turned on during fingerprint recognition.
  • each fingerprint recognition unit 20 in the direction perpendicular to the liquid crystal display panel completely covers its corresponding filter layer 30, that is, the fingerprint identification unit 20 corresponds to the position of the filter layer 30.
  • the white sub-pixel W is not used as a display pixel and is only turned on during fingerprint identification; or, as shown in FIG. 2 and FIG. 5, each fingerprint identification unit 20
  • the projection in the direction perpendicular to the liquid crystal display panel and the corresponding filter layer 30 have no intersection, that is, the fingerprint recognition unit 20 does not correspond to the position of the filter layer 30, and the white sub-pixel W can be used as a display pixel.
  • the material of the filter layer 30 is a photoresist that filters light with a wavelength above 580 nm, such as a green photoresist or a cyan photoresist. Since light with a wavelength below 580nm is generally used for fingerprint identification, the filter layer 30 is provided to filter the light with a wavelength above 580nm in the backlight light source to reduce interference light signal noise and does not affect the normal display of RGBW. It should be noted that the filter layer 30 can also use different materials to filter light of different wavelengths according to actual conditions.
  • a coating with a bandpass band is used as the filter layer 30 to filter the light in the backlight source. It can be seen that 80% of the light with a wavelength above 580nm in the backlight source is reflected, that is, the wavelength 80% of the light above 580 nm cannot pass through the filter layer 30, so that light with a wavelength above 580 nm can be filtered.
  • the liquid crystal display panel further includes an array substrate 40 and a cover plate 50 arranged oppositely; the pixel unit 10 is arranged on a side of the cover plate 50 facing the array substrate 40, The fingerprint identification unit 20 is provided between the array substrate 40 and the pixel unit 10.
  • the fingerprint identification unit 20 may be provided on the side of the array substrate 40 close to the pixel unit 10.
  • the fingerprint recognition unit 20 may also be provided on the side of the pixel unit 10 away from the cover 50.
  • each pixel unit is provided with a fingerprint recognition unit corresponding to each pixel unit, and each pixel unit includes four sub-pixels arranged in two rows and two columns, and each fingerprint recognition unit is perpendicular to the liquid crystal
  • the projection in the direction of the display panel covers part of the white sub-pixels in its corresponding pixel unit to reduce the distance between adjacent fingerprint recognition units in the same line, improve fingerprint recognition accuracy, and reduce interference light signal noise; fingerprint recognition units are perpendicular to
  • the projection in the direction of the liquid crystal display panel is also covered in the light-shielding gap to reduce the occlusion of the white sub-pixel by the fingerprint recognition unit, increase the amount of light transmitted by the white sub-pixel, and improve the light utilization rate; set a filter layer to filter the interference light, Further reduce interference light signal noise.

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Abstract

一种液晶显示面板，包括多个呈阵列排列的像素单元（10）以及与多个像素单元（10）一一对应设置的多个指纹识别单元（20）；每个像素单元（10）包括呈两行两列排列的四个子像素（11），且所述四个子像素（11）包括一个白色子像素（W）；每个指纹识别单元（20）在垂直于液晶显示面板方向上的投影覆盖其对应的像素单元（10）中的部分白色子像素（W）。

Description

液晶显示面板 技术领域
本发明涉及显示面板技术领域，尤其涉及一种液晶显示面板。
 背景技术
随着技术的不断发展，手机等移动终端的屏占比越来越高，全面屏移动终端已经成为一种发展趋势。为了实现基于LCD的屏内指纹识别，现有技术提出一种显示面板，如图1所示，该显示面板包括RGBW单元100，RGBW单元100包括红色子像素101、蓝色子像素102、绿色子像素103、白色子像素104和指纹识别单元105。其中RGBW单元102采用横向排版的设计，即将指纹识别单元105与白色子像素104纵向排列后，整体再与红色子像素101、蓝色子像素102、绿色子像素103横向排列。
但是，这种设计使得横向相邻指纹识别单元103之间的间距大于3个子像素的横向宽度，间距过大会降低指纹识别的精度。而且，横向相邻指纹识别单元103之间具有RGB三色子像素，会增干扰光信噪。另外，可见光波段的光学指纹一般利用小于580nm波段的光进行指纹识别，若直接采用背光光源进行指纹识别，会增加干扰光信噪，不利于指纹识别。
 技术问题
本发明实施例提供一种液晶显示面板，以解决现有显示面板的干扰光信噪高、指纹识别精度低的问题。
 技术解决方案
本发明实施例提供了一种液晶显示面板，包括多个呈阵列排列的像素单元以及与多个像素单元一一对应设置的多个指纹识别单元；
每个像素单元包括呈两行两列排列的四个子像素，且所述四个子像素包括一个白色子像素；每个指纹识别单元在垂直于液晶显示面板方向上的投影覆盖其对应的像素单元中的部分白色子像素。
进一步地，所有子像素的大小和形状相同；同行相邻的两个指纹识别单元之间的间距小于或等于一个子像素的宽度与一个子像素两侧遮光间隙的宽度之和。
进一步地，所述四个子像素还包括一个红色子像素、一个蓝色子像素和一个绿色子像素；
所述红色子像素与所述白色子像素对角设置，所述蓝色子像素与所述绿色子像素对角设置。
在一个实施方式中，每个白色子像素远离其对应的指纹识别单元的一侧设有滤光层。
在另一个实施方式中，每个白色子像素中设有挖空部，且所述挖空部中填充有滤光材料，以构成滤光层。
进一步地，每个指纹识别单元在垂直于液晶显示面板方向上的投影覆盖其对应的部分滤光层，或者每个指纹识别单元在垂直于液晶显示面板方向上的投影完全覆盖其对应的滤光层，或者每个指纹识别单元在垂直于液晶显示面板方向上的投影与其对应的滤光层无交集。
进一步地，所述滤光层的材料为过滤580nm以上波长的光的光阻。
进一步地，所述液晶显示面板还包括相对设置的阵列基板和盖板；
所述像素单元设于所述盖板朝向所述阵列基板的一侧，所述指纹识别单元设于所述像素单元与所述阵列基板之间。
进一步地，所述指纹识别单元为光敏传感器。
本发明实施例还提供了一种液晶显示面板，包括多个呈阵列排列的像素单元以及与多个像素单元一一对应设置的多个指纹识别单元；
每个像素单元包括呈两行两列排列的四个子像素，且所述四个子像素包括一个白色子像素；相邻子像素之间具有遮光间隙，每个指纹识别单元在垂直于液晶显示面板方向上的投影覆盖其对应的像素单元中的部分白色子像素以及所述遮光间隙。
进一步地，所有子像素的大小和形状相同；同行相邻的两个指纹识别单元之间的间距小于或等于一个子像素的宽度与一个子像素两侧遮光间隙的宽度之和。
进一步地，所述四个子像素还包括一个红色子像素、一个蓝色子像素和一个绿色子像素；
所述红色子像素与所述白色子像素对角设置，所述蓝色子像素与所述绿色子像素对角设置。
在一个实施方式中，每个白色子像素远离其对应的指纹识别单元的一侧设有滤光层。
在另一个实施方式中，每个白色子像素中设有挖空部，且所述挖空部中填充有滤光材料，以构成滤光层。
进一步地，每个指纹识别单元在垂直于液晶显示面板方向上的投影覆盖其对应的部分滤光层，或者每个指纹识别单元在垂直于液晶显示面板方向上的投影完全覆盖其对应的滤光层，或者每个指纹识别单元在垂直于液晶显示面板方向上的投影与其对应的滤光层无交集。
进一步地，每个指纹识别单元在垂直于液晶显示面板方向上的投影覆盖其对应的部分滤光层，或者每个指纹识别单元在垂直于液晶显示面板方向上的投影完全覆盖其对应的滤光层，或者每个指纹识别单元在垂直于液晶显示面板方向上的投影与其对应的滤光层无交集。
进一步地，所述滤光层的材料为过滤580nm以上波长的光的光阻。
进一步地，所述液晶显示面板还包括相对设置的阵列基板和盖板；
所述像素单元设于所述盖板朝向所述阵列基板的一侧，所述指纹识别单元设于所述像素单元与所述阵列基板之间。
 有益效果
本发明的有益效果为：每个像素单元对应设置有指纹识别单元，且每个像素单元包括呈两行两列排列的四个子像素，每个指纹识别单元在垂直于液晶显示面板方向上的投影覆盖其对应的像素单元中的部分白色子像素，以减小同行相邻指纹识别单元之间的间距，降低干扰光信噪，提高指纹识别精度；指纹识别单元在垂直于液晶显示面板方向上的投影还覆盖在遮光间隙，以减少指纹识别单元对白色子像素的遮挡，提高白色子像素的透光量，提高光利用率；设置滤光层，对干扰光进行过滤，进一步降低干扰光信噪。
 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发明的一些实施例，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为现有技术中显示面板的RGBW单元的结构示意图；
图2为本发明实施例提供的液晶显示面板中像素单元与指纹识别单元的位置关系图；
图3为本发明实施例提供的液晶显示面板中像素单元与滤光层的一位置关系图；
图4为本发明实施例提供的液晶显示面板中像素单元与滤光层的另一位置关系图；
图5为本发明实施例提供的液晶显示面板中像素单元与滤光层的又一位置关系图；
图6为本发明实施例提供的液晶显示面板中滤光层的反射波形图；
图7为本发明实施例提供的液晶显示面板的结构示意图。
 本发明的实施方式
以下参考说明书附图介绍本发明的优选实施例，用以举例证明本发明可以实施，这些实施例可以向本领域中的技术人员完整介绍本发明的技术内容，使得本发明的技术内容更加清楚和便于理解。然而本发明可以通过许多不同形式的实施例来得以体现，本发明的保护范围并非仅限于文中提到的实施例。
本发明说明书中使用的术语仅用来描述特定实施方式，而并不意图显示本发明的概念。除非上下文中有明确不同的意义，否则，以单数形式使用的表达涵盖复数形式的表达。在本发明说明书中，应理解，诸如“包括”、“具有”以及“含有”等术语意图说明存在本发明说明书中揭示的特征、数字、步骤、动作或其组合的可能性，而并不意图排除可存在或可添加一个或多个其他特征、数字、步骤、动作或其组合的可能性。附图中的相同参考标号指代相同部分。
如图2所示，本实施例提供的液晶显示面板，包括多个呈阵列排列的像素单元10以及与多个像素单元10一一对应设置的多个指纹识别单元20。其中，多个指纹识别单元20可以为光敏传感器。每个像素单元10包括四个子像素11，且所述四个子像素11中的一个子像素11为白色子像素W ，使得每个指纹识别单元对应有一个白色子像素W。
每个像素单元10的四个子像素11构成两行两列的结构。可选地，四个子像素11的形状和大小完全相同，且每个子像素11的形状为矩形，使得四个子像素11构成的像素单元10呈矩形。每个指纹识别单元20在垂直于液晶显示面板方向上的投影覆盖其对应的像素单元10中的部分白色子像素W，即每个指纹识别单元20在垂直于液晶显示面板方向上的投影与其对应的白色子像素W部分重叠。
需要说明的是，指纹识别单元20可以呈矩形，每个指纹识别单元20的投影可以覆盖其对应的白色子像素W的上半部分、中间部分或下半部分，在此不做具体限制。本实施例将像素单元10中的四个子像素11呈两行两列排列，且将指纹识别单元20与白色子像素W对应设置，减小同行相邻指纹识别单元20之间的间距，减少同行相邻指纹识别单元20之间子像素的个数，降低干扰光信噪，提高指纹识别精度。
进一步地，如图2所示，每个像素单元10还包括红色子像素R、蓝色子像素B和绿色子像素G，即四个子像素11的另外三个子像素11分别为红色子像素R、蓝色子像素B和绿色子像素G。所述红色子像素R与所述白色子像素W对角设置，所述蓝色子像素B与所述绿色子像素G对角设置。由于一般利用波段在580nm以下的光进行指纹识别，因此将白色子像素W与蓝色子像素B、绿色子像素G相邻设置，且将白色子像素W远离红色子像素R设置，以使指纹识别单元20能最大化利用蓝色子像素B和绿色子像素G的光亮，但不容易受到红色子像素R发光的影响，从而降低干扰光信噪。
进一步地，如图2所示，相邻子像素11之间具有遮光间隙12；每个指纹识别单元20在垂直于液晶显示面板方向上的投影覆盖其对应的像素单元10中的部分白色子像素W以及所述遮光间隙12。
需要说明的是，遮光间隙12用于设置数据线和扫描线，为非透光区域。每个子像素11的四周均设有遮光间隙12。指纹识别单元20在垂直于液晶显示面板方向上的投影一部分覆盖其对应的部分白色子像素W，另一部分覆盖所述部分白色子像素W周围的遮光间隙12，即将指纹识别单元20的一部分与遮光间隙12对应设置，另一部分与部分白色子像素W对应设置。被指纹识别单元20遮挡的部分白色子像素W不透光，而未被遮挡的部分白色子像素W仍可透光，因此在保证指纹识别单元20大小的同时，利用遮光间隙，减少指纹识别单元20对白色子像素W的遮挡，即减少指纹识别单元20在白色子像素W开口区域的占比，从而增大白色子像素W的透光量，增加最终到达指纹的光量，进而提高指纹的识别度。
进一步地，同行相邻的两个指纹识别单元20之间的间距小于或等于一个子像素11的宽度与一个子像素11两侧遮光间隙12的宽度之和。
例如，如图2所示，指纹识别单元20呈矩形，且指纹识别单元20在垂直于液晶显示面板方向上的投影覆盖白色子像素W的上半部分以及上半部分白色子像素W两侧的遮光间隙12和上方的遮光间隙12，使得同行相邻的两个指纹识别单元20之间的间距为一个子像素11的宽度，从而在减小对白色子像素W的遮挡的同时，进一步减小同行相邻两指纹识别单元20之间的间距，有效提高指纹识别的精度。
进一步地，所述液晶显示面板还包括滤光层30。
在一个具体的实施方式中，每个白色子像素W远离其对应的指纹识别单元20的一侧设有滤光层30。
需要说明的是，滤光层30可以设置在整个白色子像素W上，也可以仅设置在部分白色子像素W上。结合图2和图3所示，滤光层30设置在整个白色子像素W上时，每个指纹识别单元20在垂直于液晶显示面板方向上的投影覆盖其对应的部分滤光层30，即指纹识别单元20的投影与滤光层30部分重叠，此时白色子像素W不做显示像素，只在指纹识别时开启。滤光层30设置在部分白色子像素W上时，结合图2和图4所示，每个指纹识别单元20在垂直于液晶显示面板方向上的投影完全覆盖其对应的滤光层30，即指纹识别单元20与滤光层30位置相对应，此时白色子像素W不做显示像素，只在指纹识别时开启；或者，结合图2和图5所示，每个指纹识别单元20在垂直于液晶显示面板方向上的投影与其对应的滤光层30无交集，即指纹识别单元20与滤光层30位置不对应，此时白色子像素W可以做显示像素。
在另一个具体的实施方式中，每个白色子像素W中设有挖空部，且所述挖空部中填充有滤光材料，以构成滤光层30。
需要说明的是，白色子像素W开口区域中的所有透明材料都可以被挖空，以构成挖空部，也可仅对白色子像素W开口区域中的部分透明材料进行挖空，构成挖空部。挖空部中填充滤光材料，以构成滤光层30。结合图2和图3所示，滤光层30设置在整个白色子像素W的开口区域中时，每个指纹识别单元20在垂直于液晶显示面板方向上的投影覆盖其对应的部分滤光层30，即指纹识别单元20的投影与滤光层30部分重叠，此时白色子像素W不做显示像素，只在指纹识别时开启。滤光层30设置在白色子像素W的部分开口区域中时，结合图2和图4所示，每个指纹识别单元20在垂直于液晶显示面板方向上的投影完全覆盖其对应的滤光层30，即指纹识别单元20与滤光层30位置对应，此时白色子像素W不做显示像素，只在指纹识别时开启；或者，结合图2和图5所示，每个指纹识别单元20在垂直于液晶显示面板方向上的投影与其对应的滤光层30无交集，即指纹识别单元20与滤光层30位置不对应，此时白色子像素W可以做显示像素。
其中，所述滤光层30的材料为过滤580nm以上波长的光的光阻，例如绿色光阻或青色（cyan）光阻。由于一般利用波长在580nm以下的光进行指纹识别，因此设置滤光层30来过滤背光光源中波长在580nm以上的光，以降低干扰光信噪，且不影响RGBW正常显示。需要说明的是，滤光层30也可根据实际情况采用不同的材料来过滤不同波长的光。
如图6所示，采用带通带反的镀膜来作为滤光层30，对背光光源中的光进行过滤，可以看出，背光光源中波长在580nm以上的80%的光被反射，即波长在580nm以上的80%的光无法透过滤光层30，从而实现波长在580nm以上光的过滤。
进一步地，如图7所示，所述液晶显示面板还包括相对设置的阵列基板40和盖板50；所述像素单元10设于所述盖板50朝向所述阵列基板40的一侧，所述指纹识别单元20设于阵列基板40与像素单元10之间。
需要说明的是，如图7所示，指纹识别单元20可以设于阵列基板40靠近像素单元10的一侧。另外，指纹识别单元20也可以设于像素单元10远离盖板50的一侧。
由上述可知，本实施例提供的液晶显示面板，每个像素单元对应设置有指纹识别单元，且每个像素单元包括呈两行两列排列的四个子像素，每个指纹识别单元在垂直于液晶显示面板方向上的投影覆盖其对应的像素单元中的部分白色子像素，以减小同行相邻指纹识别单元之间的间距，提高指纹识别精度，且降低干扰光信噪；指纹识别单元在垂直于液晶显示面板方向上的投影还覆盖在遮光间隙，以减少指纹识别单元对白色子像素的遮挡，提高白色子像素的透光量，提高光利用率；设置滤光层，对干扰光进行过滤，进一步降低干扰光信噪。
综上所述，虽然本发明已以优选实施例揭露如上，但上述优选实施例并非用以限制本发明，本领域的普通技术人员，在不脱离本发明的精神和范围内，均可作各种更动与润饰，因此本发明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，其中，包括多个呈阵列排列的像素单元以及与多个像素单元一一对应设置的多个指纹识别单元；
    每个像素单元包括呈两行两列排列的四个子像素，且所述四个子像素包括一个白色子像素；每个指纹识别单元在垂直于液晶显示面板方向上的投影覆盖其对应的像素单元中的部分白色子像素。
  2. 根据权利要求1所述的液晶显示面板，其中，所有子像素的大小和形状相同；同行相邻的两个指纹识别单元之间的间距小于或等于一个子像素的宽度与一个子像素两侧遮光间隙的宽度之和。
  3. 根据权利要求1所述的液晶显示面板，其中，所述四个子像素还包括一个红色子像素、一个蓝色子像素和一个绿色子像素；
    所述红色子像素与所述白色子像素对角设置，所述蓝色子像素与所述绿色子像素对角设置。
  4. 根据权利要求1所述的液晶显示面板，其中，每个白色子像素远离其对应的指纹识别单元的一侧设有滤光层。
  5. 根据权利要求1所述的液晶显示面板，其中，每个白色子像素中设有挖空部，且所述挖空部中填充有滤光材料，以构成滤光层。
  6. 根据权利要求4所述的液晶显示面板，其中，每个指纹识别单元在垂直于液晶显示面板方向上的投影覆盖其对应的部分滤光层，或者每个指纹识别单元在垂直于液晶显示面板方向上的投影完全覆盖其对应的滤光层，或者每个指纹识别单元在垂直于液晶显示面板方向上的投影与其对应的滤光层无交集。
  7. 根据权利要求5所述的液晶显示面板，其中，每个指纹识别单元在垂直于液晶显示面板方向上的投影覆盖其对应的部分滤光层，或者每个指纹识别单元在垂直于液晶显示面板方向上的投影完全覆盖其对应的滤光层，或者每个指纹识别单元在垂直于液晶显示面板方向上的投影与其对应的滤光层无交集。
  8. 根据权利要求4所述的液晶显示面板，其中，所述滤光层的材料为过滤580nm以上波长的光的光阻。
  9. 根据权利要求5所述的液晶显示面板，其中，所述滤光层的材料为过滤580nm以上波长的光的光阻。
  10. 根据权利要求1所述的液晶显示面板，其中，所述液晶显示面板还包括相对设置的阵列基板和盖板；
    所述像素单元设于所述盖板朝向所述阵列基板的一侧，所述指纹识别单元设于所述像素单元与所述阵列基板之间。
  11. 根据权利要求1所述的液晶显示面板，其中，所述指纹识别单元为光敏传感器。
  12. 一种液晶显示面板，其中，包括多个呈阵列排列的像素单元以及与多个像素单元一一对应设置的多个指纹识别单元；
    每个像素单元包括呈两行两列排列的四个子像素，且所述四个子像素包括一个白色子像素；相邻子像素之间具有遮光间隙，每个指纹识别单元在垂直于液晶显示面板方向上的投影覆盖其对应的像素单元中的部分白色子像素以及所述遮光间隙。
  13. 根据权利要求12所述的液晶显示面板，其中，所有子像素的大小和形状相同；同行相邻的两个指纹识别单元之间的间距小于或等于一个子像素的宽度与一个子像素两侧遮光间隙的宽度之和。
  14. 根据权利要求12所述的液晶显示面板，其中，所述四个子像素还包括一个红色子像素、一个蓝色子像素和一个绿色子像素；
    所述红色子像素与所述白色子像素对角设置，所述蓝色子像素与所述绿色子像素对角设置。
  15. 根据权利要求12所述的液晶显示面板，其中，每个白色子像素远离其对应的指纹识别单元的一侧设有滤光层。
  16. 根据权利要求12所述的液晶显示面板，其中，每个白色子像素中设有挖空部，且所述挖空部中填充有滤光材料，以构成滤光层。
  17. 根据权利要求15所述的液晶显示面板，其中，每个指纹识别单元在垂直于液晶显示面板方向上的投影覆盖其对应的部分滤光层，或者每个指纹识别单元在垂直于液晶显示面板方向上的投影完全覆盖其对应的滤光层，或者每个指纹识别单元在垂直于液晶显示面板方向上的投影与其对应的滤光层无交集。
  18. 根据权利要求16所述的液晶显示面板，其中，每个指纹识别单元在垂直于液晶显示面板方向上的投影覆盖其对应的部分滤光层，或者每个指纹识别单元在垂直于液晶显示面板方向上的投影完全覆盖其对应的滤光层，或者每个指纹识别单元在垂直于液晶显示面板方向上的投影与其对应的滤光层无交集。
  19. 根据权利要求15所述的液晶显示面板，其中，所述滤光层的材料为过滤580nm以上波长的光的光阻。
  20. 根据权利要求12所述的液晶显示面板，其中，所述液晶显示面板还包括相对设置的阵列基板和盖板；
    所述像素单元设于所述盖板朝向所述阵列基板的一侧，所述指纹识别单元设于所述像素单元与所述阵列基板之间。
PCT/CN2019/087908 2019-03-27 2019-05-22 液晶显示面板 WO2020191909A1 (zh)

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CN110569803B (zh) * 2019-09-10 2022-05-13 京东方科技集团股份有限公司 一种纹路识别组件、显示装置及其纹路识别方法
CN111983841A (zh) * 2020-08-21 2020-11-24 武汉华星光电技术有限公司 显示面板
CN112102727B (zh) * 2020-09-28 2022-08-30 厦门天马微电子有限公司 显示面板和显示装置
CN114698386B (zh) * 2020-10-29 2023-10-24 京东方科技集团股份有限公司 阵列基板、液晶显示面板及显示装置

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