CN113221707A - Display panel and display device - Google Patents
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- CN113221707A CN113221707A CN202110484133.0A CN202110484133A CN113221707A CN 113221707 A CN113221707 A CN 113221707A CN 202110484133 A CN202110484133 A CN 202110484133A CN 113221707 A CN113221707 A CN 113221707A
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- 239000000758 substrate Substances 0.000 claims abstract description 57
- 230000000903 blocking effect Effects 0.000 claims abstract description 17
- 230000005540 biological transmission Effects 0.000 claims description 41
- 238000001514 detection method Methods 0.000 claims description 24
- 238000003384 imaging method Methods 0.000 claims description 24
- 239000011159 matrix material Substances 0.000 claims description 6
- 230000035807 sensation Effects 0.000 claims description 5
- 230000000007 visual effect Effects 0.000 abstract 1
- 239000010410 layer Substances 0.000 description 91
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- 239000002184 metal Substances 0.000 description 3
- 238000006467 substitution reaction Methods 0.000 description 3
- 239000003086 colorant Substances 0.000 description 2
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- 230000000670 limiting effect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
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- 230000004048 modification Effects 0.000 description 2
- 239000011241 protective layer Substances 0.000 description 2
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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
- G06V40/1318—Sensors therefor using electro-optical elements or layers, e.g. electroluminescent sensing
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
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Abstract
The embodiment of the invention provides a display panel and a display device, relates to the technical field of display, and aims to improve the phenomenon of color cast of a visual angle. The display panel includes: a light emitting element; a light blocking layer including a light transmitting hole; a light-shielding layer having an opening; the light hole and the projection on the substrate base plate are first orthographic projections, the light hole is provided with a first central point, the projection of the opening on the substrate base plate is a second orthographic projection, and the edge of the light hole is provided with a first point; the minimum distance between the first center point and the first point is a first distance, and the maximum distance is a second distance; the distance between the first center point of the first light hole and the first center point of the adjacent second light hole
d1Is the distance between the light-shielding layer and the light-emitting surface, d2Is the distance between the light blocking layer and the light shielding layer, L1A first orthographic projection of the first light hole and an adjacent second orthographic projectionFirst distance between projections, L2Is the second distance between the first orthographic projection of the first light-transmitting hole and the adjacent second orthographic projection.
Description
[ technical field ] A method for producing a semiconductor device
The invention relates to the technical field of display, in particular to a display panel and a display device.
[ background of the invention ]
For a display panel having a fingerprint recognition function, display light of the panel is generally used as detection light for fingerprint recognition. When pointing touch panel, the light transmission that light emitting component jetted out is to pointing and by finger reflection, and the light after the reflection jets into the fingerprint identification module, and the fingerprint identification module is gathered the light that the different positions reflection was come back, generates the fingerprint image of different positions, and then obtains complete fingerprint image through the analysis-by-synthesis again.
In the prior art, in order to reduce the reflection of the metal layer in the panel to the external environment light, a light shielding layer needs to be arranged on one side of the light-emitting surface of the display panel, and a plurality of small holes are formed in the light shielding layer so that the light reflected by the finger can be shot into the fingerprint identification module. However, when the light-shielding layer is provided with the small holes, the amount of light emitted from the display panel at a large angle is increased when the display panel displays a picture, and the color shift of the viewing angle is caused, which adversely affects the display.
[ summary of the invention ]
In view of the above, embodiments of the present invention provide a display panel and a display device, so as to improve the color shift of the viewing angle of the panel.
In one aspect, embodiments of the present invention provide a display panel, where the display panel is divided into a display area and a non-display area;
the display panel includes:
a substrate base plate;
the light-emitting elements are positioned on one side of the substrate base plate and positioned in the display area;
the light blocking layer is positioned on one side, facing the substrate base plate, of the light emitting element and comprises a plurality of light transmission holes;
a light shielding layer located on a side of the light emitting element facing away from the substrate, the light shielding layer having an opening that overlaps the light emitting element in a direction perpendicular to a plane of the substrate;
the orthographic projection of the light-transmitting hole on the substrate base plate is a first orthographic projection, the first orthographic projection is provided with a first central point, the orthographic projection of the opening on the substrate base plate is a second orthographic projection, and the edge of the second orthographic projection is provided with a first point; the minimum distance which can be between the first central point and the first point is a first distance, and the maximum distance which can be between the first central point and the first point is a second distance;
the light trap includes first light trap, with first light trap is adjacent the light trap is the second light trap, the first light trap the first central point with adjacent at least one rather than the distance P1 between the first central point of second light trap satisfies:
wherein d is1Is the distance between the light shielding layer and the light emergent surface of the display panel, d2Is the distance, L, between the light blocking layer and the light shielding layer1Is the first distance, L, between the first orthographic projection of the first light-transmitting hole and the second orthographic projection adjacent to the first light-transmitting hole2The second distance between the first orthographic projection of the first light-transmitting hole and the second orthographic projection adjacent to the first light-transmitting hole.
In another aspect, an embodiment of the present invention provides a display device, including the display panel described above.
One of the above technical solutions has the following beneficial effects:
when a finger touches the display panel, a touch point C and a touch point D are provided between the finger and the light exit surface of the display panel, the detection light W1 reflected by the touch point C passes through the position point a of the opening and the imaging focus O of the light transmitting hole to enter the fingerprint identification layer, and the detection light W2 reflected by the touch point D passes through the position point B of the opening and the imaging focus O of the light transmitting hole to enter the fingerprint identification layer. The distance between the orthographic projection of the opening position point A on the substrate base plate and the first central point of the light hole is a first distance, and the distance between the orthographic projection of the opening position point B on the substrate base plate and the first central point of the light hole is a second distance.
At this time, the projection of the detecting light W1 and the detecting light W2 onto the fingerprint identification layer defines an image area, and the image area captures an image of the finger touching the first touch defined by the touch point C and the touch point DFingerprint images within the area. The distance between touch point C and touch point D is P4,
further, due to
Substitution of tan θ 1 and tan θ 2 into
In (1) to obtain
For the adjacent first light transmission hole and the second light transmission hole, if the distance P3 between the imaging focus O of the first light transmission hole and the imaging focus O of the second light transmission hole is too large, then the distance between the first touch area corresponding to the fingerprint image collected by the first light transmission hole and the first touch area corresponding to the fingerprint image collected by the second light transmission hole is far away, so that a spacing area exists between the two touch areas, and the detection light reflected back by the finger in the spacing area cannot penetrate through the light transmission hole to enter the fingerprint identification layer, so that the fingerprint identification layer cannot collect the fingerprint image in the spacing area.
In the embodiment of the present invention, first, it should be noted that, because the sizes of the light transmission holes are small, the distance P3 between the imaging focuses O of different light transmission holes and the distance P1 between the first center points of different light transmission holes are approximately the same. The distance P1 between the first center point of the first light transmission hole and the first center point of the second light transmission hole satisfies the following conditions:
that is, the distance P3 between the imaging focal point O of the first light transmission hole and the imaging focal point O of the second light transmission hole is made to be less than or equal to P4. At the moment, the first touch area corresponding to the first light-transmitting hole is intersected or overlapped with the first touch area corresponding to the second light-transmitting hole, and no longer remains between the two first touch areasAnd the fingerprint identification layer can collect fingerprint information in all touch areas of the finger.
Based on the above analysis, unlike the prior art, the fingerprint image is captured by using the openings in the light shielding layer and the light holes in the light shielding layer, and the distance P1 between the first center points of the adjacent light holes is limited
And the collection of the complete fingerprint image can be realized. Therefore, in the embodiment of the invention, the small hole for fingerprint identification is not required to be arranged in the light shielding layer, when the display panel displays a picture, the light emitted by the light-emitting element is only emitted out of the panel through the opening and is not emitted out through the small hole of the light shielding layer, so that the phenomenon of color cast of a viewing angle caused by the increase of the light emitting quantity under a large viewing angle is effectively avoided.
In addition, for the display panel with higher resolution, the distribution density of the light emitting elements in the panel is higher, and correspondingly, the arrangement of the openings in the light shielding layer is denser. If some small holes for fingerprint identification are formed in the light shielding layer, the small holes are close to the openings, and thus, the requirement on the etching precision of the light shielding layer is high. Since the light shielding layer of the embodiment of the invention does not need to be provided with the small hole for fingerprint identification, the area where the opening is located only needs to be etched in the process of the light shielding layer. The structure not only reduces the process difficulty of the shading layer, but also is easier to match with the design of a high-resolution panel.
[ description of the drawings ]
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed 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 invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic diagram of a display panel in the prior art;
FIG. 2 is a simulation diagram of light-emitting angle and light intensity of a conventional panel structure;
FIG. 3 is a top view of a display panel according to an embodiment of the present invention;
FIG. 4 is a cross-sectional view taken along line A1-A2 of FIG. 3;
fig. 5 is a schematic projection diagram of a display panel according to an embodiment of the present invention;
FIG. 6 is a top view of a first orthographic projection and a second orthographic projection provided by an embodiment of the invention;
FIG. 7 is a schematic diagram of light transmission according to an embodiment of the present invention;
FIG. 8 is a schematic diagram of another embodiment of the transmission of light according to the present invention;
FIG. 9 is another top view of the first orthographic projection and the second orthographic projection provided by the embodiment of the invention;
FIG. 10 is a schematic diagram illustrating an alternative top view of a display panel according to an embodiment of the present invention;
FIG. 11 is a schematic projection view corresponding to FIG. 10;
FIG. 12 is a schematic diagram illustrating a top view of a display panel according to an embodiment of the present invention;
FIG. 13 is a schematic front view of the projection of FIG. 12;
FIG. 14 is a further top view of the first orthographic projection and the second orthographic projection provided by the embodiment of the invention;
fig. 15 is a schematic structural diagram of a display panel according to an embodiment of the invention;
FIG. 16 is a top view of the first orthographic projection and the second orthographic projection provided by the embodiment of the invention;
fig. 17 is a schematic structural diagram of a display panel according to an embodiment of the invention;
fig. 18 is a schematic structural diagram of a display panel according to an embodiment of the invention;
fig. 19 is a schematic structural diagram of a display device according to an embodiment of the present invention.
[ detailed description ] embodiments
For better understanding of the technical solutions of the present invention, the following detailed descriptions of the embodiments of the present invention are provided with reference to the accompanying drawings.
It should be understood that the described embodiments are only some embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The terminology used in the embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the examples of the present invention 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.
It should be understood that although the terms first and second may be used to describe the orthographic projections in the embodiments of the present invention, the orthographic projections should not be limited to these terms. These terms are only used to distinguish orthographic projections from each other. For example, the first orthographic projection may also be referred to as the second orthographic projection, and similarly, the second orthographic projection may also be referred to as the first orthographic projection, without departing from the scope of embodiments of the invention.
In the prior art, as shown in fig. 1, fig. 1 is a schematic structural diagram of a display panel in the prior art, a light shielding layer 3 ' is disposed on a side of a light emitting element 1 ' away from a substrate 2 ', a light blocking layer 4 ' is disposed on a side of the light emitting element 1 ' facing the substrate 2 ', and a plurality of small holes 5 ' are respectively disposed on the light shielding layer 3 ' and the light blocking layer 4 '. In the process of fingerprint identification, the light reflected by the finger penetrates the shading layer 3 ' and the small hole 5 ' in the shading layer 4 ' in sequence to enter the fingerprint identification module.
However, after the light-shielding layer 3 ' is provided with the small holes 5 ', referring to fig. 1 again, when the display panel displays a picture, a part of the light with a large angle emitted from the light-emitting element 1 ' is emitted through the small holes 5 ' of the light-shielding layer 3 ', so that the amount of the light emitted with a large angle is increased. As shown in fig. 2, fig. 2 is a simulation diagram of the light emitting angle and the light intensity of the existing panel structure, wherein a curve a 'represents the corresponding relationship between the light emitting angle and the light intensity when the light shielding layer 3' is not provided with the small hole 5 ', and a curve B' represents the corresponding relationship between the light emitting angle and the light intensity when the light shielding layer 3 'is provided with the small hole 5', so that after the light shielding layer 3 'is provided with the small hole 5', the light intensity of the curve B 'is higher than that of the curve a' in the light emitting angle of a larger range, and at this time, the panel has an obvious color cast phenomenon in a larger viewing angle range.
In order to solve the above problems, an embodiment of the present invention provides a display panel, as shown in fig. 3 and 4, fig. 3 is a top view of the display panel provided in the embodiment of the present invention, and fig. 4 is a cross-sectional view taken along a direction a1-a2 in fig. 3, and the display panel is divided into a display area 1 and a non-display area 2. The display panel includes: a base substrate 3; and a plurality of light emitting elements 4, wherein the light emitting elements 4 are positioned on one side of the substrate 3 and in the display area 1, and the light emitting elements 4 comprise an anode 5, a light emitting layer 6 and a cathode 7 which are stacked along the light emitting direction of the display panel.
In addition, the display panel further includes a light blocking layer 8 and a light blocking layer 9, wherein the light blocking layer 8 is located on one side of the light emitting element 4 facing the substrate 3, and is used for blocking stray light and preventing the stray light from interfering with fingerprint identification, and the light blocking layer 8 includes a plurality of light holes 10; the light shielding layer 9 is located on a side of the light emitting element 4 opposite to the substrate 3, and is used for shielding a metal layer in the panel and reducing reflection of the metal layer to external environment light, the light shielding layer 9 has an opening 11, in a direction perpendicular to a plane of the substrate 3, the opening 11 overlaps with the light emitting element 4, specifically, the opening 11 overlaps with the light emitting layer 6 in the light emitting element 4, and when the display panel displays a picture, light emitted by the light emitting layer 6 is emitted out of the panel through the opening 11.
As shown in fig. 5 and fig. 6, fig. 5 is a schematic projection diagram of the display panel according to the embodiment of the present invention, fig. 6 is a top view of a first orthographic projection 12 and a second orthographic projection 14 according to the embodiment of the present invention, an orthographic projection of the light-transmitting hole 10 on the substrate 3 is the first orthographic projection 12, the first orthographic projection 12 has a first center point 13, the first center point 13 is a geometric center point of the first orthographic projection 12, for example, an intersection point of diagonal lines of the first orthographic projection 12, an orthographic projection of the opening 11 on the substrate 3 is the second orthographic projection 14, and an edge of the second orthographic projection 14 has a first point 15. The minimum distance that can be between the first center point 13 and the first point 15 is a first distance, and the maximum distance that can be between the first center point 13 and the first point 15 is a second distance.
The light transmission holes 10 comprise first light transmission holes 16, the light transmission holes 10 adjacent to the first light transmission holes 16 are second light transmission holes 17, and the distance P1 between the first central point 13 of the first light transmission hole 16 and the first central point 13 of at least one second light transmission hole 17 adjacent to the first central point satisfies:
wherein d is1A distance between the light shielding layer 9 and a light emitting surface of the display panel, the light emitting surface of the display panel is a surface of the display panel far away from the substrate 3, when a structure of the display panel far away from the substrate 3 is a cover plate, the light emitting surface of the display panel is a surface of the cover plate far away from the substrate 3, when the structure of the display panel far away from the substrate 3 is a protective layer, the light emitting surface of the display panel is a surface of the protective layer far away from the substrate 3, d2Is the distance between the light-blocking layer 8 and the light-shielding layer 9, L1A first distance, L, between a first orthographic projection 12 of a first light-transmitting hole 16 and a second orthographic projection 14 adjacent thereto2Is the second distance between the first orthographic projection 12 of the first light-transmitting hole 16 and the second orthographic projection 14 adjacent thereto.
As shown in fig. 7, fig. 7 is a schematic diagram illustrating transmission of light provided by the embodiment of the invention, when a finger touches the display panel, a touch point C and a touch point D are provided between the finger and the light emitting surface 101 of the display panel, the detection light W1 reflected back through the touch point C penetrates through the position point a of the opening 11 and the imaging focus O of the light transmission hole 10 to enter the fingerprint identification layer 18, and the detection light W2 reflected back through the touch point D penetrates through the position point B of the opening 11 and the imaging focus O of the light transmission hole 10 to enter the fingerprint identification layer 18. The distance between the orthographic projection of the position point A of the opening 11 on the substrate base plate 3 and the first central point 13 of the light-transmitting hole 10 is a first distance, and the distance between the orthographic projection of the position point B of the opening 11 on the substrate base plate 3 and the first central point 13 of the light-transmitting hole 10 is a second distance.
At this time, the projection of the detection light W1 and the detection light W2 onto the fingerprint identification layer 18 defines an imaging area AA, and the imaging area AA acquires an image of the fingerprint of the finger in a first touch area BB defined by the touch point C and the touch point D. The distance between touch point C and touch point D is P4,
further, due to
Substitution of tan θ 1 and tan θ 2 into
In (1) to obtain
Referring to fig. 7 again, for the adjacent first light-transmitting hole 16 and the second light-transmitting hole 17, if the distance P3 between the imaging focal point O of the first light-transmitting hole 16 and the imaging focal point O of the second light-transmitting hole 17 is too large, the distance between the first touch region BB corresponding to the fingerprint image collected by the first light-transmitting hole 16 and the first touch region BB corresponding to the fingerprint image collected by the second light-transmitting hole 17 will be too large, so that there is a gap region between the two touch regions, and the detection light reflected by the finger in the gap region cannot penetrate through the light-transmitting hole 10 and enter the fingerprint identification layer 18, so that the fingerprint identification layer 18 cannot collect the fingerprint image in the gap region.
In the embodiment of the present invention, first, it should be noted that the size of the light hole 16 is smallWhile different light transmission holes 16 have a distance P3 between the imaging focal points O and a distance P1 between the first center points 13 of the different light transmission holes that are approximately the same. The embodiment of the invention satisfies the following condition by enabling the distance P1 between the first central point 13 of the first light transmission hole 16 and the first central point 13 of the second light transmission hole 17:
that is, the distance P3 between the imaging focal point O of the first light-transmitting hole 16 and the imaging focal point O of the second light-transmitting hole 17 is made to be less than or equal to P4. At this time, as shown in fig. 8, fig. 8 is another schematic transmission diagram of light provided by the embodiment of the present invention, the first touch area BB corresponding to the first light-transmitting hole 16 and the first touch area BB corresponding to the second light-transmitting hole 17 intersect or overlap, and no separation area is left between the two first touch areas BB, so that the fingerprint identification layer 18 can collect fingerprint information in all the touch areas of the finger.
Based on the above analysis, unlike the prior art, the embodiment of the present invention uses the opening 11 in the light shielding layer 9 and the light-transmitting holes 10 in the light-blocking layer 8 to acquire the fingerprint image, and the distance P1 between the first center points 13 of the adjacent light-transmitting holes 10 is limited to
And the collection of the complete fingerprint image can be realized. Therefore, in the embodiment of the present invention, it is not necessary to provide a small hole for fingerprint identification in the light shielding layer 9, and when the display panel displays a picture, the light emitted from the light emitting element 4 only exits the panel through the opening 11 and does not exit through the small hole of the light shielding layer 9, so that the color cast at a viewing angle caused by the increase of the light emitting amount at a large viewing angle is effectively avoided.
In addition, for a display panel with higher resolution, the distribution density of the light emitting elements 4 in the panel is higher, and accordingly, the arrangement of the openings 11 in the light shielding layer 9 is also denser. If the light-shielding layer 9 is provided with small holes for fingerprint identification, the small holes are close to the openings 11, and thus the etching precision of the light-shielding layer 9 is also high. Since the light-shielding layer 9 of the embodiment of the present invention does not need to be provided with a small hole for fingerprint identification, only the area where the opening 11 is located needs to be etched in the process of manufacturing the light-shielding layer 9. The structure not only reduces the process difficulty of the shading layer 9, but also is easier to match with the design of a high-resolution panel.
In addition, it should be noted that the whole area of the display area 1 can be reused as the fingerprint identification area, and in this case, the light holes 10 are distributed in the whole display area 1. Alternatively, referring to fig. 3 again, the display area 1 may be only partially reused as the fingerprint identification area 19, and in this case, the light-transmitting holes 10 may be only located in the fingerprint identification area 19.
In one embodiment, the first distance between each first forward projection 12 and its adjacent second forward projection 14 is the same, and the second distance between each first forward projection 12 and its adjacent second forward projection 14 is the same. At this time, when any one of the light transmission holes 10 is used as the first light transmission hole 16, the distance P1 between the first center point 13 of the first light transmission hole 16 and the first center point 13 of the adjacent second light transmission hole 17 is calculated according to the formula
L in (1)1And L2The numerical values of (a) and (b) are all the same, thereby reducing the design difficulty of the position of the light hole 10.
Further, the distance between the first center points 13 of any two adjacent light-transmitting holes 10 is equal, and at this time, the distance P1 between the first center points 13 of any two adjacent light-transmitting holes 10 satisfies:
with the arrangement, the first touch areas BB corresponding to the fingerprint images which can be collected by any two adjacent light holes 10 are intersected or overlapped, so that the fingerprint images of all touch areas of the finger on the light emergent surface can be collected.
In an embodiment, as shown in fig. 9, fig. 9 is another top view of the first orthographic projection 12 and the second orthographic projection 14 provided in the embodiment of the present invention, in which a plurality of the first orthographic projections 12 are arranged in a matrix, that is, the light holes 10 in the light blocking layer 8 are arranged in a matrix. Compare in the light trap 10 irregularly arrange, the light trap 10 is the matrix and arranges, has not only improved the regularity that the light trap 10 arranged, can also make the detection light that reflects back through whole finger penetrate through a plurality of light traps 10 evenly and dispersedly and penetrate into fingerprint identification layer 18, further improve the discernment precision.
In an implementation manner, as shown in fig. 10 and fig. 11, fig. 10 is another top view of the display panel provided in the embodiment of the present invention, fig. 11 is a schematic projection view corresponding to fig. 10, the light emitting element 4 includes a first color light emitting element 20 for emitting a first color light, the first color light being a detection light for performing fingerprint identification, the opening 11 includes a first opening 21, and the first opening 21 overlaps with the first color light emitting element 20 in a direction perpendicular to the plane of the substrate 3. The display area 1 comprises a plurality of detecting units 22, and the detecting units 22 comprise a first opening 21 and at least two light-transmitting holes 10, so that a larger amount of detecting light entering through the first opening 21 further enters the fingerprint identification layer 18 through the light-transmitting holes 10, and the amount of detecting light collected by the fingerprint identification layer 18 is increased.
The first color can be green, and the finger has higher absorption and reflectivity of green light and higher resolution capability of the fingerprint identification module on the green light, so that the fingerprint identification precision is relatively higher when the green light is used as detection light.
Or, first colour also can be blue, because the luminance of blue light emitting component is lower relatively, consequently, utilizes the blue light to carry out fingerprint detection, can avoid the problem that fingerprint identification precision descends that causes because of the too high discernment ability that surpasss the fingerprint identification module of luminance.
Further, referring to fig. 10 and 11 again, the detection unit 22 includes only two light-transmitting holes 10, and the first orthographic projections 12 of the two light-transmitting holes 10 are respectively located on two opposite sides of the second orthographic projection 14 of the first opening 21. So set up, can interval an opening 11 between two light traps 10 in detecting element 22, two light traps 10 can not be too near apart from each other, when utilizing two light traps 10 to increase the quantity of the detection light that fingerprint identification layer 18 gathered, can also reduce the risk that takes place light crosstalk between two light traps 10.
In one embodiment, referring again to fig. 10 and 11, the display area 1 includes a plurality of repeating regions 23, and the repeating regions 23 include at least one detecting unit 22. The orthographic projection of the repeated region 23 on the substrate base plate 3 is a third orthographic projection 24, the third orthographic projection 24 has a second center point 25, the second center point 25 is a geometric center point of the third orthographic projection 24, for example, the intersection point of diagonals of the third orthographic projection 24, and the distance P2 between the second center points 25 of two adjacent third orthographic projections 24 satisfies:
referring to fig. 11 again, the distance P2 between the second center points 25 of two adjacent third orthographic projections 24 satisfies:
when the distance P5 between the first center points 13 of the ith first orthographic projection 12_ i in the two adjacent third orthographic projections 24 is smaller than or equal to
In combination with the above analysis of fig. 7 and 8, the distance between two adjacent light holes 10 in a single repeat area 23 is smaller than that in the condition that the fingerprint information in the whole touch area of the finger can be collected
And thus more suitable for high resolution panel designs.
Further, in order to make the detection light reflected by the whole finger uniformly and dispersedly penetrate through the plurality of light-transmitting holes 10 and enter the fingerprint identification layer 18, the plurality of repeating regions 23 may be arranged in a matrix form.
It should be noted that the light emitted from the light-emitting layer 6 is randomly dispersed in all directions, and if the distance between the light-transmitting hole 10 and the light-emitting element 4 is too close, the light emitted from the light-emitting layer 6 and transmitted toward the substrate 3 may penetrate through the light-transmitting hole 10 and enter the fingerprint identification layer 18, and the light may interfere with fingerprint identification. For this purpose, in one embodiment, the first distance between the first orthographic projection 12 and the second orthographic projection 14 may be greater than 3 μm, so that the light-transmitting holes 10 and the light-emitting elements 4 have a sufficient distance therebetween to prevent light emitted by the light-emitting layer 6 and transmitted toward the substrate 3 from entering the fingerprint identification layer 18 through the light-transmitting holes 10.
In one implementation, as shown in fig. 12, fig. 12 is a further top view of the display panel provided in the embodiment of the present invention, and the light emitting elements 4 include a first color light emitting element 20 for emitting a first color light, a second color light emitting element 25 for emitting a second color light, and a third color light emitting element 26 for emitting a third color light, where the first color light is a detection light for fingerprint identification. The opening 11 includes a first opening 21, a second opening 27, and a third opening 28, and in a direction perpendicular to the plane of the base substrate 3, the first opening 21 overlaps the first color light emitting element 20, the second opening 27 overlaps the second color light emitting element 25, and the third opening 28 overlaps the third color light emitting element 26.
As shown in fig. 13, fig. 13 is a schematic front projection view corresponding to fig. 12, and a first distance between the first front projection 12 and the second front projection 14 of the first opening 21 is L11The first distance between the first orthographic projection 12 and the second orthographic projection 14 of the second opening 27 is L12The first distance between the first orthographic projection 12 and the second orthographic projection 14 of the third opening 28 is L13，L11＜L12，L11＜L13。
Adopt above-mentioned mode of setting up, the light trap 10 is closer apart from first colour light emitting component 20, and the first colour light that first colour light emitting component 20 jetted out is after reflecting back through the finger, more changes to see through the light trap 10 and jets into fingerprint identification layer 18 to effectively increased the quantity of the detection light of jetting into fingerprint identification layer 18, improved the fingerprint identification precision.
In one embodiment, referring again to fig. 4, the light-transmitting holes 10 do not overlap with the light-emitting elements 4 in a direction perpendicular to the plane of the substrate base plate 3. The anode 5 in the light emitting element 4 is usually a non-transparent electrode, and the light hole 10 does not overlap with the light emitting element 4, that is, the light hole 10 does not overlap with the anode 5, so that the detecting light entering through the opening 11 is not blocked by the anode 5 during the transmission toward the light hole 10, thereby reducing the loss of the detecting light during the transmission.
Further, as shown in fig. 14, fig. 14 is a still another top view of the first orthographic projection 12 and the second orthographic projection 14 provided in the embodiment of the present invention, the second orthographic projection 14 is rectangular, the second orthographic projection 14 includes a first edge 29 extending along a first direction and a second edge 30 extending along a second direction, the length of the first edge 29 is greater than that of the second edge 30, and the first direction intersects with the second direction; the first orthographic projection 12 is located on one side of the first edge 29 in the second direction.
For a high resolution display panel, the distribution density of the light emitting elements 4 is high, and accordingly, the arrangement of the second orthographic projection 14 of the opening 11 in the light shielding layer 9 is dense. By arranging the first orthographic projection 12 on one side of the longer edge of the second orthographic projection 14, the second distance between the first orthographic projection 12 and the second orthographic projection 14 can be reduced, so that the distance P1 between the first center points 13 of the first orthographic projections 12 of two adjacent light-transmitting holes 10 can be more easily satisfied
In an implementation manner, as shown in fig. 15, fig. 15 is another schematic structural diagram of the display panel according to the embodiment of the present invention, and the display panel further includes a fingerprint identification layer 18, where the fingerprint identification layer 18 is located on a side of the light blocking layer 8 away from the light emitting element 4, and specifically, may be a side of the light blocking layer and the substrate 3 away from the light emitting element 4. The fingerprint identification layer 18 comprises a plurality of light sensation sensors 31, and an imaging area AA of the light hole 10 on the fingerprint identification layer 18 is overlapped with the light sensation sensors 31 so as to ensure that the light sensation sensors 31 can acquire a fingerprint image of a first touch area BB corresponding to the light hole 10.
Further, as shown in fig. 16, fig. 16 is a first orthographic projection provided by the embodiment of the invention12 and 14. the first orthographic projection 12 has a second point 32. for adjacent first orthographic projection 12 and second orthographic projection 14, the minimum distance that can be between the first point 15 and the second point 32 is the minimum distance LminThe maximum distance that can be provided between the first point 15 and the second point 32 is the maximum distance Lmax。
As shown in fig. 17, fig. 17 is a schematic structural diagram of a display panel according to another embodiment of the present invention, in which the opening 11 has a first position point E1 and a second position point E2, and the light hole 10 has a third position point F1 and a fourth position point F2. Wherein, the distance between the orthographic projection of the first position point E1 on the substrate base plate 3 and the orthographic projection of the fourth position point F2 on the substrate base plate 3 is the minimum distance LminThe distance between the orthographic projection of the second position point E2 on the substrate base plate 3 and the orthographic projection of the third position point F1 on the substrate base plate 3 is the maximum distance Lmax. The light sensor 31 has a fifth position point G1 and a sixth position point G2, the first position point E1, the fourth position point F2 and the sixth position point G2 are located on the same straight line, and the second position point E2, the third position point F1 and the fifth position point G1 are located on the same straight line.
Among the detecting lights reflected by the finger, the detecting light W3 passes through the first position point E1 and the fourth position point F2, and the detecting light W4 passes through the second position point E2 and the third position point F1, the two detecting lights are two critical lights that can pass through the light-transmitting hole 10 via the opening 11, and when the detecting light W3 and the detecting light W4 are projected onto the fingerprint identification layer 18, the first region CC defined on the fingerprint identification layer 18 covers the imaging region AA. When the light sensor 31 has the fifth position point G1 and the sixth position point G2, and the fifth position point G1, the second position point E2 and the third position point F1 are located on the same straight line, and the sixth position point G2, the first position point E1 and the fourth position point F2 are located on the same straight line, it is indicated that the light sensor 31 can cover at least the first area CC, and thus the imaging area AA can be covered completely, and the light sensor 31 can acquire a complete fingerprint image formed by the light-transmitting holes 10 to a greater extent.
Further, referring to fig. 15 again, for one light sensor 31, the light sensor 31 overlaps with the imaging area AA of the first light hole 16 on the light sensor layer and does not overlap with the imaging area AA of the second light hole 17 on the light sensor layer, so as to avoid the situation of recognition error caused by the image acquired by the two light holes 10 by one light sensor 31.
In an implementation manner, as shown in fig. 18, fig. 18 is a schematic structural diagram of a display panel according to an embodiment of the present invention, the display panel further includes a color block 33, the color block 33 is located on a side of the light emitting element 4 facing away from the substrate 3, the color block 33 covers the opening 11 in a direction perpendicular to a plane of the substrate 3, and a color of the color block 33 is the same as a light emitting color of the light emitting element 4 overlapped with the color block.
When the light of the other colors emitted by the light emitting elements 4 passes through the opening 11, the light of the other colors is filtered by the color block 33 covering the opening 11, so that the part of the light cannot be emitted out of the panel, thereby optimizing the performance of the display panel, such as contrast, and the like.
Based on the same inventive concept, an embodiment of the present invention further provides a display device, as shown in fig. 19, fig. 19 is a schematic structural diagram of the display device provided in the embodiment of the present invention, and the display device includes the display panel 100. The specific structure of the display panel 100 has been described in detail in the above embodiments, and is not described herein again. Of course, the display device shown in fig. 19 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.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (17)
1. A display panel, characterized in that the display panel is divided into a display area and a non-display area;
the display panel includes:
a substrate base plate;
the light-emitting elements are positioned on one side of the substrate base plate and positioned in the display area;
the light blocking layer is positioned on one side, facing the substrate base plate, of the light emitting element and comprises a plurality of light transmission holes;
a light shielding layer located on a side of the light emitting element facing away from the substrate, the light shielding layer having an opening that overlaps the light emitting element in a direction perpendicular to a plane of the substrate;
the orthographic projection of the light-transmitting hole on the substrate base plate is a first orthographic projection, the first orthographic projection is provided with a first central point, the orthographic projection of the opening on the substrate base plate is a second orthographic projection, and the edge of the second orthographic projection is provided with a first point; the minimum distance which can be between the first central point and the first point is a first distance, and the maximum distance which can be between the first central point and the first point is a second distance;
the light trap includes first light trap, with first light trap is adjacent the light trap is the second light trap, the first light trap the first central point with adjacent at least one rather than the distance P1 between the first central point of second light trap satisfies:
wherein d is1Is that it isDistance between the light-shielding layer and the light-emitting surface of the display panel, d2Is the distance, L, between the light blocking layer and the light shielding layer1Is the first distance, L, between the first orthographic projection of the first light-transmitting hole and the second orthographic projection adjacent to the first light-transmitting hole2The second distance between the first orthographic projection of the first light-transmitting hole and the second orthographic projection adjacent to the first light-transmitting hole.
2. The display panel according to claim 1,
the first distance between each first orthographic projection and the second orthographic projection adjacent to the first orthographic projection is the same, and the second distance between each first orthographic projection and the second orthographic projection adjacent to the first orthographic projection is the same.
3. The display panel according to claim 2,
the distance between the first central points of any two adjacent light holes is equal.
4. The display panel according to claim 3,
a plurality of first orthographic projection is arranged in a matrix mode.
5. The display panel according to claim 2,
the light emitting elements comprise first color light emitting elements for emitting first color light, the first color light being detection light for fingerprint identification, the openings comprise first openings, and the first openings are overlapped with the first color light emitting elements in a direction perpendicular to a plane of the substrate base plate;
the display area comprises a plurality of detection units, and each detection unit comprises one first opening and at least two light-transmitting holes.
6. The display panel according to claim 5,
the detection unit comprises two light holes, and the first orthographic projections of the two light holes are respectively positioned at two opposite sides of the second orthographic projection of the first opening.
7. The display panel according to claim 5,
the display area comprises a plurality of repeated areas, and the repeated areas comprise at least one detection unit;
the orthographic projection of the repeated region on the substrate base plate is a third orthographic projection, the third orthographic projection has a second central point, and the distance P2 between the second central points of two adjacent third orthographic projections satisfies that:
8. the display panel according to claim 7,
the multiple repeating regions are arranged in a matrix form.
9. The display panel according to claim 1,
the first distance between the first and second orthographic projections is greater than 3 μm.
10. The display panel according to claim 1,
the light emitting elements comprise a first color light emitting element for emitting a first color light, a second color light emitting element for emitting a second color light, and a third color light emitting element for emitting a third color light, wherein the first color light is detection light for fingerprint identification;
the openings include a first opening overlapping the first color light emitting element, a second opening overlapping the second color light emitting element, and a third opening overlapping the third color light emitting element in a direction perpendicular to a plane of the substrate base plate;
the first distance between the first orthographic projection and the second orthographic projection of the first opening is L11The first distance between the first orthographic projection and the second orthographic projection of the second opening is L12The first distance between the first orthographic projection and the second orthographic projection of the third opening is L13，L11＜L12，L11＜L13。
11. The display panel according to claim 1,
in the direction perpendicular to the plane of the substrate base plate, the light-transmitting holes do not overlap with the light-emitting elements.
12. The display panel according to claim 11,
the second orthographic projection is rectangular in shape and comprises a first edge extending along a first direction and a second edge extending along a second direction, the length of the first edge is greater than that of the second edge, and the first direction intersects with the second direction;
the first orthographic projection is located on one side of the first edge in the second direction.
13. The display panel according to claim 1,
the display panel further comprises a fingerprint identification layer, the fingerprint identification layer is located on one side, back to the light emitting element, of the light blocking layer, the fingerprint identification layer comprises a plurality of light sensation sensors, and the light transmission holes are formed in an imaging area on the fingerprint identification layer and overlapped with the light sensation sensors.
14. The display panel according to claim 13,
the first orthographic projection has a second point, and for the adjacent first orthographic projection and the second orthographic projection, the minimum distance which can be between the first point and the second point is a minimum distance, and the maximum distance which can be between the first point and the second point is a maximum distance;
the opening is provided with a first position point and a second position point, the light hole is provided with a third position point and a fourth position point, the distance between the orthographic projection of the first position point on the substrate base plate and the orthographic projection of the fourth position point on the substrate base plate is the minimum distance, and the distance between the orthographic projection of the second position point on the substrate base plate and the orthographic projection of the third position point on the substrate base plate is the maximum distance;
the light sensor is provided with a fifth position point and a sixth position point, the first position point, the fourth position point and the sixth position point are located on the same straight line, and the second position point, the third position point and the fifth position point are located on the same straight line.
15. The display panel according to claim 13,
for one of the light-sensing sensors, the light-sensing sensor overlaps with the imaging area of the first light-transmitting hole on the light-sensing device layer and does not overlap with the imaging area of the second light-transmitting hole on the light-sensing device layer.
16. The display panel according to claim 1,
the display panel further comprises a color resistance block, the color resistance block is positioned on one side, back to the substrate base plate, of the light-emitting element, the color resistance block covers the opening in the direction perpendicular to the plane of the substrate base plate, and the color of the color resistance block is the same as the light-emitting color of the light-emitting element overlapped with the color of the color resistance block.
17. A display device comprising the display panel according to any one of claims 1 to 16.
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