CN110161739B - Display panel and display device - Google Patents
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- CN110161739B CN110161739B CN201910530146.XA CN201910530146A CN110161739B CN 110161739 B CN110161739 B CN 110161739B CN 201910530146 A CN201910530146 A CN 201910530146A CN 110161739 B CN110161739 B CN 110161739B
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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
- G02F1/13338—Input devices, e.g. touch panels
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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
- G02F1/133509—Filters, e.g. light shielding masks
- G02F1/133512—Light shielding layers, e.g. black matrix
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- 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
- G06V40/1324—Sensors therefor by using geometrical optics, e.g. using prisms
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- Crystallography & Structural Chemistry (AREA)
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Abstract
The embodiment of the application provides a display panel and a display device, wherein the display panel comprises an array substrate and a color film substrate which are oppositely arranged, and at least one fingerprint identification sensor is arranged on the array substrate. The color film substrate comprises a first light blocking layer and at least one second light blocking layer, the first light blocking layer comprises a plurality of first opening portions, and the second light blocking layer comprises a plurality of second opening portions. In the first direction, orthographic projections of the first opening part and the second opening part on the array substrate at least partially overlap with orthographic projections of the fingerprint identification sensors on the array substrate. In the first direction, the thickness of the first light-blocking layer is D1, and the thickness of the second light-blocking layer is D2, where D1: d2 is less than or equal to 1:2, or D1: d2 is more than or equal to 2. Compared with the prior art, the display panel provided by the embodiment of the application can shield the external environment light and the reflected light of the adjacent region, reduces the interference generated by the external environment light and the reflected light of the adjacent region, and improves the accuracy of fingerprint identification.
Description
[ technical field ] A method for producing a semiconductor device
The application relates to the technical field of display, in particular to a display panel and a display device.
[ background of the invention ]
Display panel includes display area and non-display area, and traditional display panel sets up fingerprint identification district in non-display area to realize the fingerprint identification function.
With the continuous development of the full-screen technology, the proportion of the display area in the display panel is continuously enlarged. The fingerprint identification area is integrated into the display panel, so that the screen occupation ratio is improved, and the trend of realizing a full screen is realized.
However, in the prior art, the design that the fingerprint identification function is integrated into the display panel often has the situation that the fingerprint identification accuracy is not enough and the user fingerprint cannot be identified. Therefore, it is an urgent problem to improve the accuracy of fingerprint identification in the display panel.
[ summary of the invention ]
In view of this, embodiments of the present disclosure provide a display panel and a display device, where the display panel includes an array substrate and a color film substrate that are oppositely disposed, at least one fingerprint identification sensor is disposed on the array substrate, the color film substrate includes a first light-blocking layer and at least one second light-blocking layer, and thicknesses of the first light-blocking layer and the second light-blocking layer are different by at least two times. Therefore, the external environment light and the reflected light of the adjacent area of fingerprint identification are shielded, the interference of the external environment light is reduced, the reflected light is mutually interfered, and the accuracy of the fingerprint identification is improved.
In one aspect, embodiments of the present application provide a display panel, including,
the array substrate and the color film substrate are oppositely arranged;
at least one fingerprint identification sensor is arranged on the array substrate;
the color film substrate comprises a first substrate, a color barrier layer, a first light blocking layer and at least one second light blocking layer, the first light blocking layer is positioned on one side, close to the array substrate, of the first substrate, and the first light blocking layer comprises a plurality of first opening parts;
the second light-blocking layer is located between the first light-blocking layer and the first substrate;
the second light-blocking layer includes a plurality of second opening portions;
in a first direction, orthographic projections of the first opening part and the second opening part on the array substrate at least partially overlap with orthographic projections of the fingerprint identification sensors on the array substrate; wherein the first direction is a direction perpendicular to the display panel;
in the first direction, the first light-blocking layer has a thickness of D1, and the second light-blocking layer has a thickness of D2, where D1: d2 is less than or equal to 1:2, or D1: d2 is more than or equal to 2.
In another aspect, an embodiment of the present application provides a display device, which includes the above display panel.
The embodiment of the application provides a display panel and display device, set up at least one fingerprint identification sensor on the array substrate for the reverberation of discernment fingerprint. And arranging a first light blocking layer and a second light blocking layer with the thickness difference of two times on the color film substrate to block external environment light and reflected light of adjacent regions. The first light-blocking layer includes a plurality of first opening portions, and the second light-blocking layer includes a plurality of second opening portions. The first opening and the second opening correspond to the fingerprint identification sensor and are used for enabling reflected light of the area corresponding to the fingerprint identification sensor to penetrate through the color film substrate and irradiate the fingerprint identification sensor. Therefore, the fingerprint identification sensor can accurately identify the reflected light of the corresponding area of the fingerprint identification sensor, reduce the interference of external environment light and the interference of the reflected light of adjacent areas, and improve the accuracy of fingerprint identification.
[ description of the drawings ]
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a display panel according to an embodiment of the present disclosure;
FIG. 2 is an enlarged schematic view of the area M1 in FIG. 1;
FIG. 3 is a first cross-sectional view taken along dashed line A-A' of FIG. 2;
FIG. 4 is a second cross-sectional view taken along dashed line A-A' of FIG. 2;
FIG. 5 is a third schematic cross-sectional view taken along dashed line A-A' of FIG. 2;
FIG. 6 is a fourth cross-sectional view taken along dashed line A-A' of FIG. 2;
FIG. 7 is a fifth cross-sectional view taken along line A-A' of FIG. 2;
FIG. 8 is a sixth cross-sectional view taken along line A-A' of FIG. 2;
FIG. 9 is a seventh cross-sectional view taken along dotted line A-A' of FIG. 2;
FIG. 10 is an eighth cross-sectional view taken along dashed line A-A' of FIG. 2;
FIG. 11 is a ninth cross-sectional view taken along dashed line A-A' of FIG. 2;
FIG. 12 is a tenth cross-sectional view taken along dotted line A-A' of FIG. 2;
FIG. 13 is an eleventh cross-sectional view taken along line A-A' of FIG. 2;
FIG. 14 is a twelfth cross-sectional view taken along dashed line A-A' of FIG. 2;
fig. 15 is a schematic structural diagram of a display device according to an embodiment of the present application.
[ detailed description ] embodiments
For better understanding of the technical solutions of the present application, the following detailed descriptions of the embodiments of the present application are provided with reference to the accompanying drawings.
It should be understood that the embodiments described are only a few embodiments of the present application, and not all embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without making any creative effort belong to the protection scope of the present application.
The terminology used in the embodiments of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in the examples of this application and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
It should be understood that the term "and/or" as used herein is merely one type of association that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.
In the description herein, it is to be understood that the terms "substantially", "approximately", "about", "substantially", and the like, as used in the claims and the examples herein, are intended to be generally accepted as not being precise, within the scope of reasonable process operation or tolerance.
It should be understood that although the terms first, second, third, etc. may be used to describe the display regions in the embodiments of the present application, the display regions should not be limited to these terms. These terms are only used to distinguish the display areas from each other. For example, the first display region may also be referred to as a second display region, and similarly, the second display region may also be referred to as a first display region without departing from the scope of the embodiments of the present application.
In order to more clearly describe the display panel provided in the embodiments of the present application, a structure of the display panel is described below.
The display panel includes a display area and a non-display area. In the display area, the display panel includes a plurality of sub-pixels, which are spaced apart by a black matrix. The adjacent sub-pixels form a pixel, and the sub-pixels included in the same pixel emit light of different colors with different intensities to mix the light, for example, the light of three colors of red, blue and green with different intensities are emitted respectively, so that the whole pixel can emit light of various colors.
The display panel comprises an array substrate, a color film substrate and a liquid crystal layer between the array substrate and the color film substrate. And injecting liquid crystal molecules into the liquid crystal box between the color film substrate and the array substrate in a dropping mode to form a liquid crystal layer. Since the thickness of the liquid crystal cell is uniform, the thickness of the liquid crystal molecules is uniform everywhere, accordingly.
In addition, in order to make the display panel capable of emitting light, a backlight module is arranged on one side of the display panel, which is far away from the light-emitting side.
The principle of the display panel emitting light is as follows: the white light emitted by the backlight module passes through the array substrate, then passes through the liquid crystal layer and finally passes through the color film substrate to form emergent light.
The driving circuit on the array substrate is electrified to generate an electric field, the turning of liquid crystal molecules in the liquid crystal layer corresponding to each sub-pixel is changed through the change of the electric field, and the turning condition of the liquid crystal molecules influences the intensity of white light passing through the liquid crystal molecules. When the white light generated by the backlight module passes through the liquid crystal layer, the white light intensity corresponding to each sub-pixel is different due to different turning directions of the liquid crystal molecules corresponding to each sub-pixel.
When the white light reaches the color resistance layer, the color resistance color corresponding to each sub-pixel is different, and the white light with different intensities passes through the color resistance with different colors, so that the light with different intensities and different colors can be generated. The light mixing enables a pixel comprising a plurality of sub-pixels to emit light of various colors.
When the display panel is manufactured, a first black matrix is formed on a first substrate, and sub-pixels with different colors in the color resistance layer are sequentially formed by using a MASK. The thickness of the color resistance layer is larger than or equal to that of the first black matrix. And then, covering the color resistance layer and the first black matrix by using a first planarization layer, protecting the color resistance layer, and keeping one side of the color film substrate close to the array substrate flat.
In order to set a fingerprint identification area in a display area and realize a fingerprint identification function, the embodiment of the application provides a display panel. Fig. 1 is a schematic structural diagram of a display panel according to an embodiment of the present disclosure. Fig. 2 is an enlarged schematic view of the region M1 in fig. 1. Fig. 3 is a first cross-sectional view along the dashed line a-a' in fig. 2. As shown in fig. 3, the display panel includes an array substrate 120 and a color filter substrate 110 that are oppositely disposed, at least one fingerprint sensor 121 is disposed on the array substrate 120, and the fingerprint sensor 121 may be disposed on a side of the array substrate 120 close to the color filter substrate 110, or may be disposed on a side of the array substrate 120 away from the color filter substrate 110, which is not limited in this embodiment of the application.
The color filter substrate 110 includes a first substrate 111, a color blocking layer 112, a first light-blocking layer 116, and a second light-blocking layer 119. The first light-blocking layer 116 is positioned on the first substrate 111 on the side close to the array substrate 120, the second light-blocking layer 119 is positioned between the first substrate 111 and the first light-blocking layer 116, a plurality of first opening portions 115 are provided on the first light-blocking layer 116, and a plurality of second opening portions 118 are provided on the second light-blocking layer 119.
In the first direction, the orthographic projection of the first opening portion 115 and the second opening portion 118 on the array substrate 120 at least partially overlaps with the orthographic projection of the fingerprint identification sensor 121 on the array substrate 120. The first direction is a direction perpendicular to the display panel.
The shape of the first opening portion 115 and the second opening portion 118 may be any one of a circle, an ellipse, and a rectangle along a plane parallel to the display panel, which is not limited in the embodiment of the present application.
Thus, the first opening portion 115 and the second opening portion 118 form a collimating hole, so that the reflected light of the corresponding area of the fingerprint sensor can pass through the second opening portion 118 and the first opening portion 115 in order to be irradiated onto the fingerprint sensor 131.
Further, in order to simplify the manufacturing process of the display panel, a second black matrix 117 may be formed on the first substrate 111 on a side close to the array substrate 120, an opening may be formed on the second black matrix 117 as a second light blocking layer 119, and a second planarization layer may be disposed on the second light blocking layer 119 on a side close to the array substrate 120. A first black matrix 114 is formed on the second planarization layer on the side close to the array substrate 120, and the first black matrix 114 is opened as a first light-blocking layer 116. The openings of the first black matrix 114 and the second black matrix 117 may be implemented by opening openings of a MASK, and the first black matrix 114 and the second black matrix 117 may be formed by manufacturing the same MASK since the corresponding light shielding position is the same as the opening position.
When the fingerprint identification function is realized by the display panel, a finger of a user contacts the surface of the light emitting side of the display panel, light emitted by the backlight module 140 passes through the display panel and then irradiates the finger of the user, and the finger reflects the light and then irradiates the fingerprint identification sensor 121 through the collimating hole.
It should be noted that the fingerprint of a finger is formed by ridges and valleys, and the arrangement of the ridges and valleys of each human finger is different, so that the fingerprint of each human finger is different. Because the reflection of the ridges and the valleys to the light is different, the arrangement of the ridges and the valleys on the finger of the user can be determined through the reflected light corresponding to the ridges and the valleys, the identity of the user can be further identified, and different users can be distinguished.
Specifically, the fingerprint recognition sensor 121 includes a light sensing device, a recognition module and a feedback module. Wherein, light response module is used for responding to received light, and identification module is used for discerning the valley and the ridge of fingerprint according to light that light response module received, and feedback module is used for feeding back the fingerprint result that identification module discerned to drive chip.
In order to avoid the influence of the external ambient light on the fingerprint recognition sensor 121, which affects the accuracy of fingerprint recognition, it is generally required that the aperture ratio of the collimating holes formed by the first opening portion 115 and the second opening portion 118 is in the range of 4:1 to 10:1 (inclusive), and the depth D5 of the collimating holes is at least 12 μm to 20 μm (inclusive) in consideration of the diameters of the first opening portion 115 and the second opening portion 118 being in the range of 3 μm to 5 μm (inclusive).
The black matrix is made of acrylic resin doped with black pigment, and the thickness of the first black matrix 114 and the second black matrix 117 in the display panel in the first direction cannot exceed 1.5 μm because of the characteristics of the black matrix, so in fig. 3, the first light blocking layer 116 includes the first black matrix 114 and the color blocking layer 112, and the first black matrix 114 covers the color blocking layer 112 in the first direction.
As can be known from the foregoing description of the structure of the display panel, the color-resist layer 112 in the display panel is used to convert white light into light of different colors, and the thickness of the color-resist layer 112 is greater than or equal to that of the first black matrix 114. Therefore, when the first black matrix 114 covers the color-blocking layer 112 in the first direction, the thickness D1 of the first light-blocking layer 116 is at least 2 times the thickness of the first black matrix 114. Similarly, the thickness D1 of the first light-blocking layer 116 is at least 2 times the thickness D2 of the second light-blocking layer 119.
Thereby, the thickness of the first light blocking layer 116 is increased, and the depth D5 of the collimating hole is increased, so that the depth D5 of the collimating hole can meet the requirement.
In the process of manufacturing the display panel, the first light-blocking layer 116 and the second light-blocking layer 119 need to be aligned so that the first opening portion 115 and the second opening portion 118 form alignment holes. It is understood that the smaller the distance D3 between the first light-blocking layer 116 and the second light-blocking layer 119, the higher the alignment precision of the first light-blocking layer 116 and the second light-blocking layer 119, the smaller the influence on the fingerprint identification accuracy and the display area aperture ratio. As shown in fig. 3, a second planarizing layer is provided between the first light-blocking layer 116 and the second light-blocking layer 119, and the second planarizing layer is a transparent film layer. The display panel manufacturing process enables the distance D3 between the first light-blocking layer 116 and the second light-blocking layer 119 to satisfy that D3 is not less than 2 μm and not more than 3 μm, so that the first light-blocking layer 116 and the second light-blocking layer 119 are aligned accurately.
In addition, in the second embodiment of the present invention, the scheme of thickening the first light blocking layer 116 in the display panel can also prevent the reflected light of the adjacent area of the fingerprint identification area from being obliquely incident and reaching the fingerprint identification sensor 121, which causes interference and improves the accuracy of fingerprint identification.
The embodiment of the present application further provides a second display panel, and fig. 4 is a second schematic cross-sectional view along a dashed line a-a' in fig. 2. As shown in fig. 4, the first black matrix 114 may cover a plurality of color resist layers 112 stacked on one another. Wherein, the colors corresponding to the color resist layers 112 stacked on each other may be different colors. The color-blocking layers 112 stacked on top of each other can increase the thickness of the first light-blocking layer 116 in the first direction, increase the depth D5 of the collimating hole, improve the aperture ratio, block the external ambient light, and improve the accuracy of fingerprint identification.
It should be noted that, in the display panel provided in the embodiment of the present application, the first black matrix 114 is required to cover the color resist layer 112 in the first direction, so that the color resist layer 112 needs to be formed on the first substrate 111 first, and then the first black matrix 114 needs to be formed, so that the first black matrix 114 can cover or wrap the color resist layer 112.
Based on the foregoing description of the manufacturing process of the color resist layer 112 in the prior art, the sub-pixels with different colors in the color resist layer 112 are formed by using a plurality of MASK MASKs, and compared with the prior art, the display panel provided in the embodiment of the present application does not need to add additional steps, and only needs to open the MASK MASKs at the positions of the first black matrix 114. At the same time that the color resist layer 112 is formed at the sub-pixels, the color resist layer 112 is also formed at the position of the first black matrix 114.
Further, if the MASKs MASK for forming the sub-pixels of different colors are opened at the positions of the first black matrix 114, the color resist layers 112 at the positions of the first black matrix 114 are stacked, and then the formed first black matrix 114 covers the color resist layers 114 stacked one on another. The specific number of the multilayer color resist layer 114 may be determined according to actual requirements, and is not limited in this embodiment of the application.
The display panel increases the depth D5 of the collimating hole by increasing the thickness of the first light blocking layer 116, so as to improve the accuracy of fingerprint identification.
The embodiment of the present application also proposes a third display panel, in which the depth D5 of the collimating holes is increased by increasing the thickness of the second light-blocking layer 119. Fig. 5 is a third schematic cross-sectional view along the dashed line a-a' in fig. 2. As shown in fig. 5, the display panel includes an array substrate 120 and a color filter substrate 110, which are oppositely disposed, and the color filter substrate 110 includes a first substrate 111, a color blocking layer 112, a first light blocking layer 116, and a second light blocking layer 119.
The first light-blocking layer 116 is positioned on the first substrate 111 on the side close to the array substrate 120, the second light-blocking layer 119 is positioned between the first substrate 111 and the first light-blocking layer 116, a plurality of first opening portions 115 are provided on the first light-blocking layer 116, and a plurality of second opening portions 118 are provided on the second light-blocking layer 119.
The second light-blocking layer 119 includes a second black matrix 117 and first support columns 1110, and the second black matrix 117 covers the first support columns 1110 in the first direction.
Wherein, in the first direction, the orthographic projection of the first opening portion 115 and the second opening portion 118 on the array substrate 120 at least partially overlaps with the orthographic projection of the fingerprint identification sensor 121 on the array substrate 120. The first direction is a direction perpendicular to the display panel.
The third display panel provided by the embodiment of the application covers the structure of the first support column 1110 in the first direction through the second black matrix 117, so that the thickness of the second light-blocking layer 119 in the first direction is increased, the depth D5 of the collimation hole is increased, interference light is blocked from entering the fingerprint identification unit, and the fingerprint identification precision is improved.
Since the height of the first support column 1110 in the first direction is equal to or greater than the thickness of the second black matrix 117 in the first direction, the thickness D2 of the second light-blocking layer 119 is at least 2 times the thickness of the second black matrix 117 with the structure in which the second black matrix 117 wraps or covers the first support column 1110 in the first direction. Similarly, the thickness D2 of the second light-blocking layer 119 is at least 2 times the thickness D1 of the first light-blocking layer 116.
In addition, the third display panel with the thickened second light-blocking layer 119 can also prevent the reflected light from the neighboring area of the fingerprint identification area from entering obliquely and reaching the fingerprint identification sensor 121, which causes interference and improves the accuracy of fingerprint identification.
The embodiment of the present application further provides a fourth display panel, and fig. 6 is a fourth schematic cross-sectional view taken along a dotted line a-a' in fig. 2. As shown in fig. 6, the second light-blocking layer 119 may be a plurality of layers, and the same structure is used for each layer of the second light-blocking layer 119. The structure of the second light-blocking layers 119 can increase the depth D5 of the collimating holes, improve the aperture ratio, block external environment light and improve the fingerprint identification accuracy.
The display panel increases the thickness of the second light-blocking layer 119 in the first direction by the structure that the second black matrix 117 wraps or covers the first support column 1110 in the first direction, and further increases the depth D5 of the collimating holes, so as to improve the accuracy of fingerprint identification.
The embodiment of the present application also provides a fifth display panel, in which a black support column is used as the second light-blocking layer 119 to increase the thickness of the second light-blocking layer in the first direction. Fig. 7 is a fifth cross-sectional view taken along the dashed line a-a' in fig. 2. As shown in fig. 7, the display panel includes an array substrate 120 and a color filter substrate 110, which are oppositely disposed, and the color filter substrate 110 includes a first substrate 111, a color blocking layer 112, a first light blocking layer 116, and a second light blocking layer 119.
The first light-blocking layer 116 is positioned on the first substrate 111 on the side close to the array substrate 120, the second light-blocking layer 119 is positioned between the first substrate 111 and the first light-blocking layer 116, a plurality of first opening portions 115 are provided on the first light-blocking layer 116, and a plurality of second opening portions 118 are provided on the second light-blocking layer 119.
The second light-blocking layer 119 is a second support column 1120, and the color of the second support column 1120 is black.
Wherein, in the first direction, the orthographic projection of the first opening portion 115 and the second opening portion 118 on the array substrate 120 at least partially overlaps with the orthographic projection of the fingerprint identification sensor 121 on the array substrate 120. The first direction is a direction perpendicular to the display panel.
In the fifth display panel provided in the embodiment of the present application, the black second supporting pillars 1120 are used as the second light-blocking layer 119, and the height of the second supporting pillars 1120 in the first direction is increased to increase the depth D5 of the alignment hole, so that the depth D5 of the alignment hole is required to be greater than the thickness of the first black matrix 114 in the first direction.
Specifically, the height of the second support columns 1120 in the first direction may be set to be at least 2 times the thickness of the first black matrix 114. Thus, the thickness D2 of the second light-blocking layer 119 is at least 2 times the thickness D1 of the first light-blocking layer 116.
It should be noted that the second black supporting columns 1120 are made of UV-curable bio-acryl resin doped with black pigment, and the thickness in the first direction may be much greater than that of the first black matrix 114.
The embodiment of the present application further provides a sixth display panel, and fig. 8 is a sixth schematic cross-sectional view along a dotted line a-a' in fig. 2. As shown in fig. 8, the second light-blocking layer 119 may be a plurality of layers, and the same structure is used for each layer of the second light-blocking layer 119. The structure of the second light-blocking layers 119 can increase the depth D5 of the collimating holes, improve the aperture ratio, block external ambient light, and improve the accuracy of fingerprint identification.
The display panel increases the depth D5 of the collimating hole by improving the film structure of the color film substrate and increasing the thickness of the first light blocking layer 116 or the thickness of the second light blocking layer 119, so as to block the external ambient light and improve the accuracy of fingerprint identification.
In the seventh display panel, a third light-blocking layer 1140 is disposed on a side of the first light-blocking layer 116 close to the array substrate 120 to block light reflected by the external environment and the adjacent area. Fig. 9 is a seventh cross-sectional view along the dashed line a-a' in fig. 2. As shown in fig. 9, the display panel includes an array substrate 120 and a color filter substrate 110, which are oppositely disposed, and the color filter substrate 110 includes a first substrate 111, a color blocking layer 112, a first light blocking layer 116, and a third light blocking layer 133.
The first light blocking layer 116 is disposed on one side of the first substrate 111 close to the array substrate 120, the third light blocking layer 133 is disposed on one side of the first light blocking layer 116 close to the array substrate 120, and a plurality of first opening portions 115 are disposed on the first light blocking layer 116.
Specifically, the third light-blocking layer 133 may be black support columns, and the liquid crystal molecules 132 between the black support columns transmit light as the opening portions of the third light-blocking layer 133.
Wherein, in the first direction, the orthographic projection of the first opening part 115 on the array substrate 120 at least partially overlaps with the orthographic projection of the fingerprint identification sensor 121 on the array substrate 120. The first direction is a direction perpendicular to the display panel.
The seventh display panel provided by the present application uses UV-curable bio-acryl resin doped with black pigment to fabricate the black support pillar, and two ends of the black support pillar are respectively in contact with the first planarization layer 113 and the array substrate 120. The display panel can be supported, external environment light and reflected light of adjacent areas can be shielded, and fingerprint identification accuracy is improved.
It should be noted that the black support posts need to be shielded from light, and therefore the black support posts need to be disposed around a circumference of the collimation holes.
In the first direction, the height D4 of the black support pillars may be 9 μm or more, so that the depth D5 of the formed collimating holes is sufficient.
In addition, in the foregoing embodiment of the display panel, the arrangement of the second light-blocking layer 119 does not conflict with the arrangement of the third light-blocking layer 133, so that the depth D5 of the collimating holes can be increased, the aperture ratio can be increased, and the accuracy of fingerprint identification can be further improved by combining the two embodiments.
For convenience of describing the technical effects of the combined technical solutions, the following description is given by way of example and is not intended to limit the embodiments of the present application.
Fig. 10 is an eighth cross-sectional view taken along a dotted line a-a ' in fig. 2, fig. 11 is a ninth cross-sectional view taken along a dotted line a-a ' in fig. 2, and fig. 12 is a tenth cross-sectional view taken along a dotted line a-a ' in fig. 2.
As shown in fig. 10-12, the black support pillars are used to replace the support pillars 131 in the liquid crystal layer 130 of the display panel, so as to improve the light blocking effect of the collimating holes and improve the fingerprint identification accuracy.
In the display panel, a plurality of first opening portions 115 and a plurality of second opening portions 118 are formed in the first light-blocking layer 116 and the second light-blocking layer 119, respectively, so that reflected light can be applied to the fingerprint sensor 121.
It can be understood that the reflected light is light emitted from the backlight module 140, passes through the display panel, irradiates the surface of the user's finger, and is reflected to form a weak light. The fingerprint sensor 121 is disposed on the array substrate 120, and the reflected light needs to pass through the transparent film layer of the color film substrate 110, the liquid crystal layer 130, and a portion of the film layer of the array substrate 120 again to reach the fingerprint sensor 121.
In the embodiment of the present application, in order to avoid that a part of the film layers of the array substrate 120 affects the propagation path of the reflected light, the corresponding position of the part of the film layers of the array substrate 120 in the display panel is opened, and for convenience of description, the scheme is described based on the structure of the display panel in fig. 3, but the array substrate 120 after being opened may be used for all the display panels, which is not limited in the embodiment of the present application.
Fig. 13 is an eleventh cross-sectional view taken along the dotted line a-a' in fig. 2, and as shown in fig. 13, an array substrate 120 in a display panel according to an embodiment of the present disclosure includes a second substrate 122, a buffer layer 123 sequentially stacked on the second substrate 122, a fingerprint sensor 121, a common electrode layer 124, a first insulating layer 125, and a pixel electrode layer 126.
Based on the foregoing description of the display principle of the display panel, it can be known that the pixel electrode layer 126 and the common electrode layer 124 are used to generate an electric field to drive the liquid crystal molecules 132 in the liquid crystal layer 130 to turn, the refractive index of the material used to make the pixel electrode layer 126 is usually 1.9, the refractive index of the material used to make the first insulating layer 125 is usually 1.91, and when the reflected light passes through the pixel electrode layer 126 and the first insulating layer 125, a part of the light deviates from the original propagation path due to refraction and cannot reach the fingerprint sensor 121, so that the reflected light obtained by the fingerprint sensor 121 is reduced, and the accuracy of fingerprint identification is affected.
In order to reduce the refraction of the pixel electrode layer 126 and the first insulating layer 125 to the reflected light, the pixel electrode layer 126 of the display panel proposed in the embodiment of the present application includes at least one third opening 128, the first insulating layer 125 includes at least one fourth opening 127, and in the first direction, the orthographic projections of the third opening 128 and the fourth opening 127 on the second substrate 122 at least partially overlap with the orthographic projection of the fingerprint identification sensor on the second substrate 122.
Therefore, when the reflected light passes through the pixel electrode layer 126 and the first insulating layer 125, no refraction is generated, more reflected light reaches the fingerprint identification sensor 121, and the accuracy of fingerprint identification is improved.
Further, based on the description of the display principle of the display panel, it can be known that the light emitted by the display panel comes from the backlight module 140, and the second substrate 122 and the buffer layer 123 are transparent films, and the light emitted by the backlight module 140 irradiates the side of the fingerprint sensor 121 close to the buffer layer 123 along the emergent light direction.
The array substrate 120 of the display panel of the embodiment of the application further includes a fourth light blocking layer 129, which is located on a side of the buffer layer 123 far away from the fingerprint sensor 121. Therefore, interference light rays from the backlight module 140 are blocked, and in the first direction, the orthographic projection of the fingerprint identification sensor 121 on the second substrate 122 is located in the orthographic projection of the fourth light blocking layer 129 on the second substrate 122, so that the fingerprint identification sensor 121 is completely blocked by the fourth light blocking layer 129 in the first direction, and the fingerprint identification precision is improved.
Fig. 14 is a twelfth cross-sectional view taken along the dotted line a-a' in fig. 2, as shown in fig. 14, the liquid crystal layer 130 further includes a sealant 134, and the sealant 134 forms a closed space in the area of the liquid crystal layer 130 corresponding to the fingerprint sensor 121. When the liquid crystal molecules 131 are injected into the liquid crystal cell during the manufacturing of the display panel, the liquid crystal molecules 131 cannot enter the closed space formed by the sealant 134, and thus the liquid crystal molecules 131 are not in the closed space. When the reflected light passes through the liquid crystal layer 130, it is not affected by the liquid crystal molecules 131.
An embodiment of the present application further provides a display device, as shown in fig. 15, fig. 15 is a schematic structural diagram of the display device provided in the embodiment of the present application, and the display device includes the display panel. The specific structure of the display panel has been described in detail in the above embodiments, and is not described herein again. Of course, the display device shown in fig. 15 is only a schematic illustration, and the display device may be any electronic device with a display function, such as a mobile phone, a tablet computer, a notebook computer, an electronic book, or a television.
Because the display device that this application embodiment provided includes above-mentioned display panel, consequently, adopt this display device, set up at least one fingerprint identification sensor on the array substrate for discernment fingerprint's reflection light. And arranging a light blocking layer on the color film substrate to block the external environment light and the reflected light of the adjacent region. The first light-blocking layer includes a plurality of first opening portions, and the second light-blocking layer includes a plurality of second opening portions. The first opening and the second opening correspond to the fingerprint identification sensor and are used for enabling reflected light of the area corresponding to the fingerprint identification sensor to penetrate through the color film substrate and irradiate the fingerprint identification sensor. Therefore, the fingerprint identification sensor can accurately identify the reflected light of the corresponding area of the fingerprint identification sensor, and the accuracy of fingerprint identification in the display panel is improved.
The above description is only a preferred embodiment of the present application and should not be taken as limiting the present application, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present application should be included in the protection scope of the present application.
Claims (12)
1. A display panel, comprising:
the array substrate and the color film substrate are oppositely arranged;
at least one fingerprint identification sensor is arranged on the array substrate;
the color film substrate comprises a first substrate, a color barrier layer, a first light blocking layer and at least one second light blocking layer, the first light blocking layer is located on one side, close to the array substrate, of the first substrate, the first light blocking layer comprises a plurality of first opening parts, the first light blocking layer comprises a first black matrix and at least one color barrier layer, the color barrier layer is covered by the first black matrix in the first direction, the orthographic projection of the color barrier layer on the first substrate falls into the orthographic projection of the first black matrix on the first substrate, and the color barrier layer is wrapped by the first black matrix;
the second light-blocking layer is located between the first light-blocking layer and the first substrate;
the second light-blocking layer includes a plurality of second opening portions;
in a first direction, orthographic projections of the first opening part and the second opening part on the array substrate at least partially overlap with orthographic projections of the fingerprint identification sensors on the array substrate; wherein the first direction is a direction perpendicular to the display panel;
in the first direction, the first light-blocking layer has a thickness of D1, and the second light-blocking layer has a thickness of D2, where D1: d2 is less than or equal to 1:2, or D1: d2 is more than or equal to 2.
2. The display panel of claim 1,
the at least one color resistance layer is a plurality of color resistance layers which are mutually stacked.
3. The display panel of claim 1,
the second light-blocking layer includes a second black matrix and first support pillars, the second black matrix covering the first support pillars in the first direction.
4. The display panel of claim 1,
the second light-blocking layer is a second supporting column, and the color of the second supporting column is black.
5. The display panel of claim 1,
the display panel further comprises a third light-blocking layer, and the third light-blocking layer is positioned on one side, close to the array substrate, of the first light-blocking layer.
6. The display panel of claim 5,
the third light-blocking layer is a black support column.
7. The display panel of claim 6,
the color film substrate further comprises a first planarization layer, the first planarization layer is positioned on one side, close to the first light-blocking layer, of the third light-blocking layer,
and two ends of the black support column are respectively contacted with the first planarization layer and the array substrate.
8. The display panel according to any one of claims 1 to 7,
in the first direction, the distance between the first light-blocking layer and the second light-blocking layer is D3, wherein D3 is not less than 2 μm and not more than 3 μm.
9. The display panel of claim 1,
the array substrate comprises a second substrate, and a buffer layer, the fingerprint identification sensor, a common electrode layer, a first insulating layer and a pixel electrode layer which are sequentially stacked on the second substrate;
wherein the pixel electrode layer includes at least one third opening, and the first insulating layer includes at least one fourth opening;
in the first direction, orthographic projections of the third opening and the fourth opening on the second substrate at least partially overlap with orthographic projections of the fingerprint identification sensor on the second substrate.
10. The display panel of claim 9,
the array substrate further comprises a fourth light blocking layer, the fourth light blocking layer is located on one side, away from the fingerprint identification sensor, of the buffer layer, and in the first direction, the orthographic projection of the fingerprint identification sensor on the second substrate is located in the orthographic projection of the fourth light blocking layer on the second substrate.
11. The display panel of claim 1,
the first opening portion and the second opening portion have any one of a circular shape, an elliptical shape, and a rectangular shape along a plane parallel to the display panel.
12. A display device characterized by comprising the display panel according to any one of claims 1 to 11.
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| CN110472617B (en) * | 2019-08-29 | 2021-10-12 | 维沃移动通信有限公司 | Display module and electronic equipment |
| CN112649984A (en) * | 2019-10-12 | 2021-04-13 | 北京小米移动软件有限公司 | Liquid crystal display panel and intelligent terminal provided with same |
| CN110796055B (en) * | 2019-10-22 | 2021-09-03 | 武汉华星光电技术有限公司 | Display panel and display device |
| CN111160323B (en) | 2020-02-19 | 2023-08-01 | 武汉华星光电技术有限公司 | Display panel and electronic device |
| CN111624780A (en) * | 2020-05-28 | 2020-09-04 | 武汉华星光电技术有限公司 | Collimator structure, display device and manufacturing method of display device |
| CN111650772B (en) * | 2020-06-24 | 2023-05-23 | 京东方科技集团股份有限公司 | Color film substrate and fingerprint identification display device |
| CN111983841A (en) * | 2020-08-21 | 2020-11-24 | 武汉华星光电技术有限公司 | Display panel |
| CN112180636B (en) * | 2020-10-22 | 2021-09-24 | 武汉华星光电技术有限公司 | Display panel and display device |
| CN112666737B (en) * | 2020-12-29 | 2022-10-04 | 武汉华星光电技术有限公司 | Liquid crystal display panel |
| JP2022108900A (en) * | 2021-01-14 | 2022-07-27 | 株式会社ジャパンディスプレイ | Display device |
| CN113093421B (en) * | 2021-03-17 | 2023-06-02 | 武汉华星光电技术有限公司 | Display panel and display device |
| CN113219691B (en) * | 2021-03-25 | 2023-01-24 | 武汉华星光电技术有限公司 | Liquid crystal display panel and display device |
| CN113111775B (en) * | 2021-04-12 | 2022-11-01 | 武汉华星光电技术有限公司 | Display panel and preparation method thereof |
| CN113376677A (en) * | 2021-05-24 | 2021-09-10 | 信利半导体有限公司 | Collimating device of optical sensor and x-ray flat panel detector |
| CN113469079A (en) * | 2021-07-07 | 2021-10-01 | 上海天马微电子有限公司 | Display panel and display device |
| CN113594225B (en) * | 2021-08-11 | 2023-06-30 | 云谷（固安）科技有限公司 | Display panel and display device |
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| KR101362959B1 (en) * | 2007-03-30 | 2014-02-13 | 엘지디스플레이 주식회사 | Liquid Crystal Display Device Having Sensing Function And Method For Fabricating Thereof |
| KR101954778B1 (en) * | 2012-12-18 | 2019-03-06 | 엘지디스플레이 주식회사 | Liquid Crystal Display Device |
| CN104516156A (en) * | 2014-12-26 | 2015-04-15 | 南京中电熊猫液晶显示科技有限公司 | Liquid crystal display panel |
| CN106019694A (en) * | 2016-08-02 | 2016-10-12 | 武汉华星光电技术有限公司 | Color filter, LCD panel, LCD and color filter forming method |
| KR102291493B1 (en) * | 2016-08-11 | 2021-08-20 | 삼성디스플레이 주식회사 | Color filter and display device including the same |
| CN106371242B (en) * | 2016-11-11 | 2019-03-26 | 合肥京东方光电科技有限公司 | A kind of display base plate, display panel, display device and production method |
| CN206470777U (en) * | 2016-12-23 | 2017-09-05 | 敦捷光电股份有限公司 | Biometric recognition device.It |
| CN107819083A (en) * | 2017-11-30 | 2018-03-20 | 京东方科技集团股份有限公司 | Color membrane substrates, its preparation method, display panel and display device |
| CN108428725B (en) * | 2018-03-30 | 2021-07-09 | 上海天马有机发光显示技术有限公司 | Array substrate, manufacturing method of array substrate, display panel and display device |
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