CN108829283B - Display panel and display device - Google Patents
Display panel and display device Download PDFInfo
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- CN108829283B CN108829283B CN201810521670.6A CN201810521670A CN108829283B CN 108829283 B CN108829283 B CN 108829283B CN 201810521670 A CN201810521670 A CN 201810521670A CN 108829283 B CN108829283 B CN 108829283B
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0412—Digitisers structurally integrated in a display
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0416—Control or interface arrangements specially adapted for digitisers
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
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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
- 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
- G06V40/1347—Preprocessing; Feature extraction
- G06V40/1359—Extracting features related to ridge properties; Determining the fingerprint type, e.g. whorl or loop
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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
- G06V40/1365—Matching; Classification
- G06V40/1376—Matching features related to ridge properties or fingerprint texture
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
- G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
- G06F2203/04112—Electrode mesh in capacitive digitiser: electrode for touch sensing is formed of a mesh of very fine, normally metallic, interconnected lines that are almost invisible to see. This provides a quite large but transparent electrode surface, without need for ITO or similar transparent conductive material
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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
- G06V40/1341—Sensing with light passing through the finger
Abstract
The invention discloses a display panel and a display device, wherein the display panel comprises a display area, the display area comprises a touch electrode and a plurality of fingerprint identification units; the display panel comprises a substrate base plate and a plurality of pixel units positioned on the substrate base plate, wherein each pixel unit comprises at least three sub-pixels, and each sub-pixel comprises a sub-pixel opening area; the touch electrode is of a metal grid structure, and the orthographic projection of the metal grid to the substrate base plate is positioned between the opening areas of the adjacent sub-pixels; the substrate base plate comprises a plurality of transmission areas and non-transmission areas, wherein the transmission areas are not provided with metal grids, and the non-transmission areas are areas on the substrate base plate except the transmission areas; at least one transmissive region is included in one pixel unit. The display device comprises the display panel. The invention can increase the transmission amount of light rays reflected to the fingerprint identification unit through the fingerprint valleys and ridges on the surface of the finger on the premise of not influencing the touch sensitivity of the touch electrode, thereby improving the identification precision of the fingerprint identification unit.
Description
Technical Field
The present invention relates to the field of display technologies, and in particular, to a display panel and a display device.
Background
Fingerprints are unique to each individual. With the development of science and technology, a variety of display devices with fingerprint identification functions appear in the market, such as mobile phones, tablet computers, intelligent wearable devices and the like. Like this, the user just needs to touch display device's fingerprint identification module with the finger before the display device that the operation has the fingerprint identification function, just can carry out the authority and verify, has simplified the authority verification process.
The optical fingerprint identification technology is widely applied to fingerprint identification modules of various display devices by virtue of good stability and high identification sensitivity, and is a mature scheme at present. The principle of the optical fingerprint identification technology is that a light source is additionally arranged or the light source of a display is reflected to a fingerprint identification unit through the fingerprint valley and the ridge on the surface of a finger, and a detection signal is processed to identify a fingerprint image. For increasing the bendability when designing display panel, what is more commonly used at present is directly integrated the display panel with touch-control electrode on, but this kind of technique can lead to when fingerprint identification, and light is sheltered from by touch-control electrode, leads to the decline of light transmittance to arouse the reduction of fingerprint identification printing opacity, influence the fingerprint identification precision.
Therefore, it is an urgent need to provide a display panel and a display device that can improve the fingerprint recognition accuracy without affecting the function of the touch electrode.
Disclosure of Invention
In view of the above, the present invention provides a display panel and a display device to solve the problems in the prior art.
The invention discloses a display panel, comprising: the display area comprises a touch electrode and a plurality of fingerprint identification units; the display panel comprises a substrate base plate and a plurality of pixel units positioned on the substrate base plate, wherein each pixel unit comprises at least three sub-pixels, and each sub-pixel comprises a sub-pixel opening area; the touch electrode is of a metal grid structure, and the orthographic projection of the metal grid to the substrate base plate is positioned between the opening areas of the adjacent sub-pixels; the substrate base plate comprises a plurality of transmission areas and non-transmission areas, wherein the transmission areas are not provided with metal grids, and the non-transmission areas are areas on the substrate base plate except the transmission areas; at least one transmissive region is included in one pixel unit.
The invention also discloses a display device comprising any one of the display panels.
Compared with the prior art, the display panel and the display device provided by the invention at least realize the following beneficial effects:
by designing the touch electrode into a metal grid structure, the touch electrode of the metal grid structure has low impedance and high flexibility, and can overcome the defect that the traditional touch electrode material is made of transparent indium tin oxide. The orthographic projection of the metal grids to the substrate base plate is positioned between the opening areas of the adjacent sub-pixels, so that the metal grids are arranged around each sub-pixel, and the touch electrode of the metal grid structure does not influence the display quality and the display effect of each sub-pixel. The touch electrode of the metal grid structure is designed in a non-uniform mode, the area on the substrate is divided into a plurality of permeation areas and non-permeation areas, and metal grids are not arranged in the permeation areas. The invention can increase the transmission amount of light rays reflected to the fingerprint identification unit through the fingerprint valleys and ridges on the surface of the finger on the premise of not changing the average density of the touch electrode, namely not influencing the touch sensitivity of the touch electrode, thereby improving the identification precision of the fingerprint identification unit.
Of course, it is not necessary for any product in which the present invention is practiced to achieve all of the above-described technical effects simultaneously.
Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.
FIG. 1 is a schematic structural diagram of a display panel according to an embodiment of the present invention;
FIG. 2 is a schematic view of the M-M' direction cross-section of FIG. 1;
FIG. 3 is a second schematic structural diagram of a display panel according to an embodiment of the present invention;
FIG. 4 is a third schematic structural diagram of a display panel according to an embodiment of the present invention;
FIG. 5 is a fourth schematic structural diagram of a display panel according to an embodiment of the present invention;
FIG. 6 is a fifth schematic view illustrating a display panel according to an embodiment of the present invention;
FIG. 7 is a sixth schematic structural view of a display panel according to an embodiment of the present invention;
FIG. 8 is a schematic structural diagram of a touch electrode according to an embodiment of the invention;
FIG. 9 is a schematic cross-sectional view illustrating a display panel according to an embodiment of the invention;
FIG. 10 is a schematic cross-sectional view of another display panel according to an embodiment of the invention;
fig. 11 is a schematic structural diagram of a display device according to an embodiment of the invention.
Detailed Description
Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.
The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.
Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.
In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
Referring to fig. 1 and fig. 2, fig. 1 is a schematic structural diagram of a display panel 00 according to an embodiment of the present invention, fig. 2 is a schematic structural diagram of a cross-section along direction M-M' of fig. 1, where the display panel 00 according to the embodiment includes: the display area AA comprises a touch electrode 01 and a plurality of fingerprint identification units 02;
the display panel 00 includes a substrate base plate 1 and a plurality of pixel units 2 on the substrate base plate 1, each pixel unit 2 including at least three sub-pixels 20, the sub-pixels 20 including sub-pixel opening areas 21;
the touch electrode 01 is of a metal grid structure, and the orthographic projection of the metal grid to the substrate base plate 1 is positioned between the adjacent sub-pixel opening areas 21;
the substrate base plate 1 comprises a plurality of permeable areas 11 and non-permeable areas 12, no metal grids are arranged in the permeable areas 11, and the non-permeable areas 12 are areas on the substrate base plate 1 except the permeable areas 11; one pixel unit 2 includes at least one transmissive region 11 therein.
Specifically, in the present embodiment, the touch electrode 01 and the plurality of fingerprint identification units 02 are both disposed in the display area AA of the display panel 00, the touch electrode 01 is used for receiving and transmitting a touch signal to sense a touch action performed on the display panel 00, and the plurality of fingerprint identification units 02 are used for processing the sensed signal to identify a fingerprint image when an external light source or a light source of the display panel 00 itself is reflected to the fingerprint identification units 02 through the finger surface valley and ridge.
The display panel 00 includes a substrate 1, a plurality of pixel units 2 are disposed on the substrate 1, each pixel unit 2 includes at least three sub-pixels 20, and the sub-pixels 20 include sub-pixel opening regions 21; the touch electrode 01 with the metal grid structure has low impedance and high flexibility, and can solve the problems that the traditional touch electrode material made of transparent indium tin oxide has poor flexibility and large impedance, the loss ratio of signals is improved, the effective transmission rate of the signals is reduced, and the touch sensitivity of the display panel is reduced in the signal transmission process.
The orthographic projection of the metal mesh to the substrate base plate 1 is positioned between the adjacent sub-pixel opening areas 21, so that the metal mesh is arranged around each sub-pixel 20, and the touch electrode 01 of the metal mesh structure does not influence the display quality and the display effect of each sub-pixel 20.
Dividing the area on the substrate base plate 1 into a plurality of transmission areas 11 and non-transmission areas 12, wherein no metal grids are arranged in the transmission areas 11, the transmission areas 11 are positioned between two sub-pixel opening areas 21, or the transmission areas 11 are at least adjacent to one sub-pixel opening area 21, and the non-transmission areas 12 are the areas on the substrate base plate 1 except the transmission areas 11, so that the touch electrode 01 with the metal grid structure adopts a non-uniform design; in the prior art, the touch electrode 01 of the metal mesh structure is generally designed uniformly, and if the density of the metal mesh in the prior art in the area of one pixel unit 2 is ρ 1, in this embodiment, since no metal mesh is disposed in the transmissive area 11, the density of the metal mesh in the non-transmissive area 12 in the area of one pixel unit 2 is ρ 2, it should be noted that ρ 1 in this embodiment is smaller than ρ 2, so that the local density of one pixel unit 2 is changed, that is, the density of the metal mesh near the transmissive area 11 is reduced, the density of the metal mesh in the non-transmissive area 12 is increased, but the total density or the average density of the whole metal mesh is unchanged, that is, the touch sensitivity of the touch electrode 01 is not affected, and the transmission amount of light reflected to the fingerprint identification unit 02 via the finger surface valley and the ridge can be increased, thereby improving the recognition accuracy of the fingerprint recognition unit 02. Please refer to fig. 2, the touch electrode 01 of the present embodiment is generally attached to the film encapsulation layer 03 after the film encapsulation is completed.
The pixel unit 2 comprises at least one transmission area 11, so that the number of the transmission areas 11 on the substrate base plate 1 can be increased as much as possible on the premise of not influencing the display function and the display effect of the display panel 00, the transmission amount of light reflected to the fingerprint identification unit 02 is further increased, and the identification precision of the fingerprint identification unit 02 is enhanced.
In the embodiment, the touch electrode 01 is designed to be a metal grid structure, and the touch electrode 01 with the metal grid structure not only has low impedance but also has high flexibility, and can overcome the defect that the conventional touch electrode material is made of transparent indium tin oxide. The orthographic projection of the metal mesh to the substrate base plate 1 is positioned between the adjacent sub-pixel opening areas 21, so that the metal mesh is arranged around each sub-pixel 20, and the touch electrode 01 of the metal mesh structure does not influence the display quality and the display effect of each sub-pixel 20. The touch electrode 01 of the metal grid structure adopts non-uniform design, the area on the substrate base plate 1 is divided into a plurality of transmission areas 11 and non-transmission areas 12, and no metal grid is arranged in the transmission areas 11, so that the transmission amount of light reflected to the fingerprint identification unit 02 through the fingerprint valley and the ridge on the surface of a finger is increased on the premise of not changing the average density of the touch electrode 01, namely, not influencing the touch sensitivity of the touch electrode 01, and the identification precision of the fingerprint identification unit 02 is improved.
In some optional embodiments, please refer to fig. 3, fig. 3 is a second schematic structural diagram of the display panel 00 according to the second embodiment of the present invention, in this embodiment, the metal grid includes a plurality of walking line portions 011 and a plurality of column walking line portions 012, the walking line portions 011 extend along the row direction X, and the column walking line portions 012 extend along the column direction Y;
the sub-pixel aperture areas 21 are arranged in rows and columns, and each pixel unit 2 comprises a first sub-pixel aperture area 211, a second sub-pixel aperture area 212, and a third sub-pixel aperture area 213.
In this embodiment, the main structure of the touch electrode 01 with a metal grid structure is further described, and the sub-pixel opening area 21 of each pixel unit 2 is arranged in rows and columns, the touch electrode 01 includes a plurality of walking line portions 011 and a plurality of column walking line portions 012, the walking line portions 011 extends along the row direction X, the column walking line portions 012 extends along the column direction Y, and the walking line portions 011 and the column walking line portions 012 are defined to describe the structure of the touch electrode 01 with a metal grid structure more clearly.
It should be noted that, in the present embodiment, the arrangement of the sub-pixel opening areas 21 of each pixel unit 2 is only illustrated by way of example, so as to more clearly illustrate the structure of the touch electrode 01 of the non-uniform design in the present embodiment, therefore, the present embodiment is not limited to the display panel 00 of the arrangement manner of the sub-pixel opening areas 21, and the display panels 00 of the other types of the arrangement manners of the pixel units 2 are all suitable for the touch electrode 01 of the non-uniform design in the present embodiment, and only the touch sensitivity of the touch electrode 01 needs not to be affected.
In some optional embodiments, with reference to fig. 3, in the present embodiment, in odd columns, the first sub-pixel opening area 211, the second sub-pixel opening area 212, and the third sub-pixel opening area 213 are sequentially and cyclically arranged along the column direction Y;
on even columns, the third sub-pixel opening area 213 is located between the first sub-pixel opening area 211 and the second sub-pixel opening area 212 of the odd columns; the second sub-pixel opening area 212 is located between the first sub-pixel opening area 211 and the third sub-pixel opening area 213 of the odd-numbered columns; the first sub-pixel opening area 211 is positioned between the third sub-pixel opening area 213 and the second sub-pixel opening area 212 of the odd-numbered columns;
the transmissive area 11 is located between two sub-pixel opening areas 21 adjacent in the row direction X.
In this embodiment, a layout manner of how the first sub-pixel opening area 211, the second sub-pixel opening area 212, and the third sub-pixel opening area 213 of each pixel unit 2 are respectively arranged on odd columns and even columns is provided, and it is described that, for such pixel layout, the position of the transmission area 11 is set, so that the position of the transmission area can not only enable one pixel unit 2 to include at least one transmission area 11, but also enable the setting of the transmission area 11 to greatly improve the transmission amount of light reflected onto the fingerprint identification unit 02, thereby enhancing the identification accuracy of the fingerprint identification unit 02.
In some optional embodiments, please refer to fig. 3 again, in this embodiment, the transmission region 11 is located between two adjacent first sub-pixel opening regions 211 in the row direction X, no walking line portion 011 is disposed in the transmission region 11, two walking line portions 011 are disposed between two adjacent second sub-pixel opening regions 212 in the row direction X, and a walking line portion 011 is disposed between two adjacent third sub-pixel opening regions 213 in the row direction X;
or referring to fig. 4, fig. 4 is a third schematic structural diagram of the display panel 00 according to the embodiment of the present invention, the transmission region 11 is still located between two adjacent first sub-pixel opening regions 211 in the row direction X, no walking line portion 011 is disposed in the transmission region 11, two walking line portions 011 are disposed between two adjacent third sub-pixel opening regions 213 in the row direction X, and a walking line portion 011 is disposed between two adjacent second sub-pixel opening regions 212 in the row direction X.
In this embodiment, regarding the arrangement of the first sub-pixel opening areas 211, the second sub-pixel opening areas 212, and the third sub-pixel opening areas 213 of each pixel unit 2 in the odd-numbered columns and the even-numbered columns, the positions of the transmissive areas 11 may be set in three ways as long as the transmissive areas 11 are located between two sub-pixel opening areas 21 adjacent to each other in the row direction X, for example, the transmissive areas 11 are located between two first sub-pixel opening areas 211 adjacent to each other in the row direction X, or the transmissive areas 11 are located between two second sub-pixel opening areas 212 adjacent to each other in the row direction X, or the transmissive areas 11 are located between two third sub-pixel opening areas 213 adjacent to each other in the row direction X. In this embodiment, it is preferable that the transmission region 11 is located between two adjacent first sub-pixel opening regions 211 in the row direction X, because two traveling line portions 011 are disposed between two adjacent third sub-pixel opening regions 213 in the row direction X, and one traveling line portion 011 is disposed between two adjacent second sub-pixel opening regions 212 in the row direction X, and accordingly, PS pillars are disposed between two adjacent third sub-pixel opening regions 213 in the row direction X and between two adjacent second sub-pixel opening regions 212 in the row direction X, so as to avoid the arrangement of the PS pillars, and to increase the transmittance of the transmission region 11, the transmission region 11 is disposed between two adjacent first sub-pixel opening regions 211 in the row direction X.
If the first sub-pixel opening area 211 is defined to emit red light, the second sub-pixel opening area 212 is defined to emit green light, and the third sub-pixel opening area 213 is defined to emit blue light in this embodiment, since the amount of light signals between red light and between green light received by the fingerprint identification unit 02 is the largest compared to that between red light, between green light, and between blue light for the same light signal intensity, the identification of the fingerprint identification unit 02 can be made more sensitive; therefore, the position of the transmissive region 11 is preferably set in two ways, one way is that the transmissive region 11 is disposed between two adjacent first sub-pixel opening regions 211 in the row direction X, i.e. between red light, the other way is that the transmissive region 11 is disposed between two adjacent second sub-pixel opening regions 212 in the row direction X, i.e. between green light, and the embodiment selects the transmissive region 11 between two adjacent first sub-pixel opening regions 211 in the row direction X for illustration. It should be further noted that, since the intensity of the light signal received by the fingerprint identification unit 02 between blue lights is weak compared to between red lights and between green lights, the transmissive region 11 should be avoided as much as possible from being disposed between two adjacent third sub-pixel opening regions 213 in the row direction X, and therefore this arrangement is not considered in this embodiment.
In contrast, in the arrangement mode in which the transmissive area 11 is located between two adjacent first sub-pixel opening areas 211 in the row direction X, in order not to affect the touch sensitivity of the touch electrode 01, that is, in order not to change the average density of the touch electrode 01, the arrangement of the walking line portion 011 of the metal mesh in one pixel unit 2 may be performed in two modes as shown in fig. 3 and 4.
It should be noted that, this embodiment only exemplifies the arrangement of the two metal grids of fig. 3 and fig. 4, in order to more clearly describe how this embodiment can not only set a metal grid in the transmissive area 11, but also does not change the average density of the touch electrode 01, so this embodiment is not limited to the arrangement of the walking line portion 011 and the column wiring portion 012 of the metal grid, and the arrangement of the metal grids of the remaining structures is within the protection range of this embodiment as long as the metal grid is not set in the transmissive area 11 and the average density of the touch electrode 01 is not changed.
In some optional embodiments, please refer to fig. 5, fig. 5 is a fourth schematic structural view of the display panel 00 according to the embodiment of the present invention, in this embodiment, the lengths of the walking line portions 011 on odd-numbered columns are all L1, the lengths of the walking line portions 011 on even-numbered columns are all L2, and L1 is smaller than L2; the transmissive area 11 is located on the first sub-pixel opening area 211 side and the second sub-pixel opening area 212 side on the even columns between the adjacent columns.
In this embodiment, another arrangement of the position of the transmission region 11 is described with respect to the arrangement of the first sub-pixel opening region 211, the second sub-pixel opening region 212, and the third sub-pixel opening region 213 of each pixel unit 2 on the odd-numbered columns and the even-numbered columns, respectively, and with respect to the position where the transmission region 11 is arranged, the structure of the touch electrode 01 of the metal grid structure is described, even though the length L1 of the walking line portion 011 on the odd-numbered columns is not equal to the length L2 of the walking line portion 011 on the even-numbered columns, and L1 is smaller than L2, so that the transmission region 11 is arranged between two adjacent sub-pixel opening regions 21 on the wider even-numbered columns; meanwhile, in order to not change the average density of the touch electrode 01 in each pixel unit 2 and to make each pixel unit 2 include at least one transmissive region 11, the transmissive region 11 may be located on the first sub-pixel opening region 211 side and the second sub-pixel opening region 212 side in the even-numbered columns between the adjacent columns. If the first sub-pixel opening area 211 is defined to emit red light, the second sub-pixel opening area 212 is defined to emit green light, and the third sub-pixel opening area 213 is defined to emit blue light in this embodiment, the transmissive area 11 is preferably located on the first sub-pixel opening area 211 side and the second sub-pixel opening area 212 side of the even-numbered rows between the adjacent rows in the same manner as described above.
In some optional embodiments, please continue to refer to fig. 5, in the present embodiment, a difference between L2 and L1 is greater than a width L of the transmissive region 11 in the row direction X0。
In this embodiment, it is further defined that in the display panel 00 shown in fig. 5, the difference between the length L1 of the walking line portion 011 on the odd-numbered columns and the length L2 of the walking line portion 011 on the even-numbered columns is larger than the width L of the transmissive area 11 in the row direction X0So that the orthographic projection of the metal mesh onto the substrate base plate 1 is located between the adjacent sub-pixel opening areas 21 because the difference between L2 and L1 is smaller than the width L of the transmission area 11 in the row direction X0Then, there is a high possibility that the metal mesh overlaps the sub-pixel opening area 21, resulting in a problem that the metal mesh blocks light.
In some optional embodiments, please refer to fig. 6, fig. 6 is a fifth structural schematic diagram of the display panel 00 according to an embodiment of the present invention, in this embodiment, in one pixel unit 2, the first sub-pixel opening area 211, the second sub-pixel opening area 212, and the third sub-pixel opening area 213 are located on the same row.
In this embodiment, another arrangement of the first sub-pixel opening area 211, the second sub-pixel opening area 212, and the third sub-pixel opening area 213 of the pixel unit 2 is proposed, that is, in one pixel unit 2, the first sub-pixel opening area 211, the second sub-pixel opening area 212, and the third sub-pixel opening area 213 are located on the same row, which is a common arrangement of the pixel units 2 in the prior art.
In some alternative embodiments, referring to fig. 6, in the present embodiment, in one pixel unit 2, the transmission region 11 is located between the second sub-pixel opening region 212 and the third sub-pixel opening region 213, and two column routing portions 012 are disposed between the first sub-pixel opening region 211 and the second sub-pixel opening region 212.
In this embodiment, the arrangement of the pixel units 2 shown in fig. 6 is further described, where the transmission region 11 is disposed, the transmission region 11 is disposed between the second sub-pixel opening region 212 and the third sub-pixel opening region 213, that is, no column routing portion 012 is disposed between the second sub-pixel opening region 212 and the third sub-pixel opening region 213 in the same pixel unit 2, and two column routing portions 012 are disposed between the first sub-pixel opening region 211 and the second sub-pixel opening region 212 in the same pixel unit 2, so that not only the metal mesh is not disposed in the transmission region 11, but also the density of the metal mesh is unchanged, thereby increasing the amount of light reflected to the fingerprint identification unit 02 through the finger surface valley and ridge, and improving the identification accuracy of the fingerprint identification unit 02.
Please refer to fig. 7, fig. 7 is a sixth schematic structural view of a display panel according to an embodiment of the present invention, the transmissive area 11 of the embodiment may be further located between the first sub-pixel opening area 211 and the second sub-pixel opening area 212, and the two row trace portions 012 may be located between the second sub-pixel opening area 212 and the third sub-pixel opening area 213. Therefore, the specific positions and structures of the transmission region 11, the walking line portion 011 and the column walking line portion 012 of the metal mesh are not specifically limited in this embodiment, and it is only necessary that the densities of the metal meshes of the touch electrode 01 in each pixel unit 2 are the same and are within the protection scope of the present invention, and this embodiment is not described herein again.
In some optional embodiments, referring to fig. 8, fig. 8 is a schematic structural diagram of a touch electrode 01 according to an embodiment of the present invention, in the embodiment, the touch electrode 01 includes a transmitting electrode TX and a receiving electrode RX, the transmitting electrode TX includes a plurality of first sub-portions TX1 arranged along the column direction Y, and the plurality of first sub-portions TX1 are connected by a plurality of first connection portions T1; the receiving electrode RX includes a plurality of second sub-sections RX1 arranged in the row direction X, and the plurality of second sub-sections RX1 are connected by a plurality of second connection portions R1; the first sub-part TX1 and the second sub-part RX1 are both diamond-shaped structures.
In this embodiment, the touch electrode 01 includes a transmitting electrode TX and a receiving electrode RX, a first sub-portion TX1 of the transmitting electrode TX in the same column is connected by a plurality of first connection portions T1, and a second sub-portion RX1 of the receiving electrode RX in the same row is connected by a plurality of second connection portions R1, where it should be noted that the transmitting electrode TX and the receiving electrode RX can be interchanged in the row direction X and the column direction Y, and this embodiment is not particularly limited, that is, the transmitting electrode TX can be in the row direction X, and the receiving electrode RX can be in the column direction Y.
Specifically, a capacitance is formed where the transmitting electrode TX and the receiving electrode RX cross, that is, the transmitting electrode TX and the receiving electrode RX respectively form two poles of the capacitance, and when a finger touches the display panel 00, the coupling between the two electrodes near the touch point is affected, thereby changing the capacitance between the two transmitting electrodes TX and the receiving electrode RX.
Referring to fig. 8, the transmitting electrodes TX in the column direction Y sequentially transmit the excitation signals, and the receiving electrodes RX in the row direction X simultaneously receive the signals, so that the capacitance values of the intersections of the transmitting electrodes TX and the receiving electrodes RX in all the column direction Y and the row direction X, that is, the capacitance values of the two-dimensional plane of the entire display panel 00, can be obtained, and then the coordinates of each touch point can be calculated according to the two-dimensional capacitance variation data of the display panel 00.
In some optional embodiments, please refer to fig. 9, and fig. 9 is a schematic cross-sectional structure diagram of a display panel 00 according to an embodiment of the present invention, in which a plurality of fingerprint identification units 02 are disposed on a substrate 1.
In this embodiment, the plurality of fingerprint identification units 02 are disposed on the substrate base plate 1, so that the fingerprint identification units 02 and some structures of the display panel 00 are integrated on the same film layer, for example, the pixel units 2 on the substrate base plate 1, which not only makes the display panel 00 thin, but also simplifies the manufacturing process flow of the display panel 00.
In some optional embodiments, referring to fig. 10, fig. 10 is a schematic cross-sectional structure view of another display panel 00 according to an embodiment of the present invention, in this embodiment, a plurality of fingerprint identification units 02 are disposed on a fingerprint identification substrate 3, and the fingerprint identification substrate 3 is attached to a non-light-emitting side of the display panel 00.
In this embodiment, set up a plurality of fingerprint identification units 02 on fingerprint identification base plate 3, fingerprint identification base plate 3 laminates in the non-light-emitting one side of display panel 00, separately make fingerprint identification unit 02 and display panel 00, not only can reduce the degree of difficulty of display panel 00 preparation technology, make display panel 00's preparation more tend to the normality, can also separate fingerprint identification unit 02, fingerprint identification base plate 3's preparation and display panel 00's preparation, when display panel 00 needs fingerprint identification function only need with two parts laminating preparation can, can reduce the technology degree of difficulty, improve work efficiency.
In some optional embodiments, please refer to fig. 10, in the present embodiment, the fingerprint identification unit 02 includes a photosensitive device 021, and a forward projection of the photosensitive device 021 to the substrate 1 coincides with the transmissive region 11.
In this embodiment, the orthographic projection of the photosensitive device 021 of the fingerprint identification unit 02 to the substrate base plate 1 is further limited to coincide with the transmission area 11, so that the quantity of light rays reflected onto the photosensitive device 021 by the fingerprint valleys and ridges on the surface of the finger is the largest and the transmission quantity is the largest, and the identification precision of the fingerprint identification unit 02 is improved to the maximum extent.
It should be noted that fig. 10 is only a schematic cross-sectional structure diagram of another display panel according to an embodiment of the present invention, and only shows that in the case of a cross section, an orthogonal projection of the photosensitive device 021 of the fingerprint identification unit 02 to the substrate base plate 1 coincides with the transmissive area 11, and also can refer to fig. 1 continuously, that is, a position of the transmissive area 11 is a position where the photosensitive device 021 of the fingerprint identification unit 02 is disposed, and a person skilled in the art can refer to fig. 1 to understand that an orthogonal projection of the photosensitive device 021 of this embodiment to the substrate base plate 1 coincides with the transmissive area 11.
In some optional embodiments, please refer to fig. 11, fig. 11 is a schematic structural diagram of a display device 000 according to an embodiment of the present invention, and the display device 000 provided in this embodiment includes the display panel 00 according to any of the embodiments of the present invention. The embodiment of fig. 11 is only an example of a mobile phone, and the display device 000 is described, it is understood that the display device 000 provided in the embodiment of the present invention may be another display device 000 with a display function, such as a computer, a television, and a vehicle-mounted display device, and the present invention is not limited thereto. The display device 000 provided in the embodiment of the present invention has the beneficial effects of the display panel 00 provided in the embodiment of the present invention, and specific reference may be specifically made to the specific description of the display panel 00 in the foregoing embodiments, which is not described herein again.
As can be seen from the above embodiments, the display panel 00 and the display device 000 provided by the present invention at least achieve the following beneficial effects:
by designing the touch electrode 01 into a metal grid structure, the touch electrode 01 of the metal grid structure has low impedance and high flexibility, and can solve the problem of poor flexibility of the traditional touch electrode material made of transparent indium tin oxide. The orthographic projection of the metal mesh to the substrate base plate 1 is positioned between the adjacent sub-pixel opening areas 21, so that the metal mesh is arranged around each sub-pixel 20, and the touch electrode 01 of the metal mesh structure does not influence the display quality and the display effect of each sub-pixel 20. The touch electrode 01 of the metal grid structure adopts non-uniform design, the area on the substrate base plate 1 is divided into a plurality of transmission areas 11 and non-transmission areas 12, and no metal grid is arranged in the transmission areas 11, so that the transmission amount of light reflected to the fingerprint identification unit 02 through the fingerprint valley and the ridge on the surface of a finger is increased on the premise of not changing the average density of the touch electrode 01, namely, not influencing the touch sensitivity of the touch electrode 01, and the identification precision of the fingerprint identification unit 02 is improved.
Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustrative purposes only and are not intended to limit the scope of the present invention. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.
Claims (8)
1. A display panel, comprising: the display area comprises a touch electrode and a plurality of fingerprint identification units;
the display panel comprises a substrate base plate and a plurality of pixel units positioned on the substrate base plate, wherein each pixel unit comprises at least three sub-pixels, and each sub-pixel comprises a sub-pixel opening area;
the touch electrode is of a metal grid structure, and the orthographic projection of the metal grid to the substrate base plate is positioned between the adjacent sub-pixel opening areas;
the substrate base plate comprises a plurality of transmission areas and non-transmission areas, wherein no metal grids are arranged in the transmission areas, and the non-transmission areas are areas on the substrate base plate except the transmission areas; one pixel unit comprises at least one transmission area;
the sub-pixel opening areas are arranged in rows and columns, and each pixel unit comprises a first sub-pixel opening area, a second sub-pixel opening area and a third sub-pixel opening area;
on odd columns, the first sub-pixel opening area, the second sub-pixel opening area and the third sub-pixel opening area are sequentially and circularly arranged along the column direction;
on even columns, the third sub-pixel opening area is located between the first and second sub-pixel opening areas of the odd columns; the second sub-pixel opening area is located between the first sub-pixel opening area and the third sub-pixel opening area of the odd column; the first sub-pixel opening area is located between the third sub-pixel opening area and the second sub-pixel opening area of the odd-numbered columns;
the metal grid comprises a plurality of walking line parts and a plurality of column walking line parts, wherein the walking line parts extend along the row direction, and the column walking line parts extend along the column direction;
the transmission area is positioned between two adjacent first sub-pixel opening areas in the row direction, the walking line part is not arranged in the transmission area, two walking line parts are arranged between two adjacent second sub-pixel opening areas in the row direction, and one walking line part is arranged between two adjacent third sub-pixel opening areas in the row direction;
or two walking line parts are arranged between two adjacent third sub-pixel opening areas in the row direction, and one walking line part is arranged between two adjacent second sub-pixel opening areas in the row direction.
2. The display panel according to claim 1,
the lengths of the walking line parts on the odd columns are all L1, the lengths of the walking line parts on the even columns are all L2, and the L1 is smaller than the L2; the transmissive region is located on the first sub-pixel opening region side and the second sub-pixel opening region side on the even-numbered columns between adjacent columns.
3. The display panel according to claim 2,
the difference between the L2 and the L1 is greater than the width of the transmissive region in the row direction.
4. The display panel according to claim 1,
the touch electrode comprises a transmitting electrode and a receiving electrode, the transmitting electrode comprises a plurality of first sub-portions which are arranged along the column direction, and the first sub-portions are connected through a plurality of first connecting portions; the receiving electrode comprises a plurality of second sub-portions arranged along the row direction, and the second sub-portions are connected through a plurality of second connecting portions; the first sub-portion and the second sub-portion are both of a diamond structure.
5. The display panel according to claim 1, wherein the plurality of fingerprint identification units are disposed on the substrate base plate.
6. The display panel of claim 1, wherein the plurality of fingerprint identification units are disposed on a fingerprint identification substrate, and the fingerprint identification substrate is attached to a non-light-emitting side of the display panel.
7. The display panel according to claim 1, wherein the fingerprint identification unit comprises a light sensing device, and an orthographic projection of the light sensing device to the substrate base plate coincides with the transmission region.
8. A display device characterized by comprising the display panel according to any one of claims 1 to 7.
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| CN110750177B (en) * | 2019-10-29 | 2023-05-23 | 武汉天马微电子有限公司 | Touch display panel and touch display device |
| CN110838559A (en) * | 2019-11-26 | 2020-02-25 | 京东方科技集团股份有限公司 | Display device, display panel and manufacturing method thereof |
| CN110890412A (en) * | 2019-11-29 | 2020-03-17 | 武汉天马微电子有限公司 | Display panel and display device |
| CN110970480A (en) * | 2019-12-17 | 2020-04-07 | 京东方科技集团股份有限公司 | Display panel and display device |
| EP4236658A3 (en) | 2020-01-20 | 2023-10-11 | BOE Technology Group Co., Ltd. | Array substrate and display device |
| US11782558B2 (en) | 2020-04-01 | 2023-10-10 | Chengdu Boe Optoelectronics Technology Co., Ltd. | Touch structure, touch display panel and electronic device |
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