CN111597892B - Display panel and display device - Google Patents

Abstract

The invention discloses a display panel and a display device. The display panel comprises a display area, the display area comprises a fingerprint identification area, a non-fingerprint identification area and a plurality of pixels, the fingerprint identification area comprises a fingerprint identification unit, the pixels in the fingerprint identification area comprise a first sub-pixel emitting first color light and a second sub-pixel emitting second color light, the first sub-pixel is multiplexed into a fingerprint identification light source, the pixels in the non-fingerprint identification area comprise a third sub-pixel emitting first color light and a fourth sub-pixel emitting second color light, the light emitting area of the first sub-pixel is larger than the light emitting area of the third sub-pixel, and the shortest distance between the first sub-pixel and the second sub-pixel is smaller than or equal to the shortest distance between the third sub-pixel and the fourth sub-pixel. According to the display panel and the display device provided by the invention, the luminous area of the first sub-pixel is larger than that of the third sub-pixel, so that the luminous flux received by the fingerprint identification unit is increased, and the sensitivity of fingerprint identification is improved.

Description

Display panel and display device

Technical Field

The embodiment of the invention relates to the technical field of display, in particular to a display panel and a display device.

Background

Fingerprint recognition is a biological recognition mode which is used for everyone, and has a great effect in protecting personal privacy. Various display devices with fingerprint identification functions appear in the market, such as mobile phones, tablet computers, intelligent wearable devices and the like, and users can conduct authority verification only by touching the mobile intelligent devices with fingers, so that the authority verification process is simplified. However, the fingerprint identification devices are all located in the non-display area of the display device, so that the screen occupation ratio is reduced, for example, some mobile phone fingerprint identifications are located on the back of the mobile phone, and the user experience is reduced.

Along with the push of the full-face screen, a display panel with a fingerprint identification unit arranged in a display area is a recent trend of mobile phone development. Light emitted by the fingerprint identification light source is received by the fingerprint identification unit after being reflected by the valleys and the ridges of the finger, so that the fingerprint identification function is realized. But the display panel comprises an electrode, a pixel circuit metal wire, a capacitor and other opaque metal layers, light emitted by the fingerprint identification light source or light reflected by the finger can be shielded, so that the light transmittance of the display panel is lower, the luminous flux received by the fingerprint identification unit is low, and the sensitivity of fingerprint identification is reduced. Moreover, as the brightness required during fingerprint identification is higher, the luminous brightness of the fingerprint identification light source can be improved during fingerprint identification, however, the service life of the fingerprint identification light source can be reduced faster than that of a non-fingerprint identification light source, and thus the problem of uneven display is caused.

Disclosure of Invention

The invention provides a display panel and a display device, which are used for improving the problem of uneven display caused by quicker service life decay of a fingerprint identification light source and improving the sensitivity of fingerprint identification.

In a first aspect, an embodiment of the present invention provides a display panel, including a display area, where the display area includes a fingerprint identification area, a non-fingerprint identification area, and a plurality of pixels;

the fingerprint identification area comprises a fingerprint identification unit;

the pixels in the fingerprint identification area comprise a first sub-pixel emitting light of a first color and a second sub-pixel emitting light of a second color, and the first sub-pixel is multiplexed into a fingerprint identification light source; the pixels in the non-fingerprint identification area comprise a third sub-pixel emitting light of a first color and a fourth sub-pixel emitting light of a second color; the light emitting area of the first sub-pixel is larger than the light emitting area of the third sub-pixel, and the shortest distance between the first sub-pixel and the second sub-pixel is smaller than or equal to the shortest distance between the third sub-pixel and the fourth sub-pixel;

the display panel further comprises a substrate base plate, and the fingerprint identification area further comprises a light transmission area; the vertical projection of the light transmission area on the substrate base plate covers the vertical projection of the fingerprint identification unit on the substrate base plate; the light transmittance of the light-transmitting area is larger than that of the non-fingerprint identification area.

In a second aspect, an embodiment of the present invention further provides a display apparatus, including any one of the display panels described in the first aspect.

According to the display panel provided by the embodiment of the invention, the luminous area of the first sub-pixel multiplexed as the fingerprint identification light source is larger than the luminous area of the third sub-pixel, so that the luminous area of the first sub-pixel is increased in the fingerprint identification stage, the luminous flux received by the fingerprint identification unit is increased, the light transmission area is further arranged above the fingerprint identification unit of the fingerprint identification area, the light transmittance of the light transmission area is larger than that of the non-fingerprint identification area, and the luminous flux received by the fingerprint identification unit is further increased, so that the sensitivity of fingerprint identification of the fingerprint identification area is improved.

Drawings

Fig. 1 is a schematic structural diagram of a display panel according to an embodiment of the present invention;

FIG. 2 is an enlarged schematic view of the structure of FIG. 1 at area A;

FIG. 3 is a schematic cross-sectional view of FIG. 2 along the direction B-B';

fig. 4 is a schematic structural diagram of another display panel according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of a fingerprint identification area according to an embodiment of the present invention;

fig. 6 is a schematic structural diagram of another fingerprint identification area according to an embodiment of the present invention;

FIG. 7 is a schematic cross-sectional view of FIG. 6 along the direction C-C';

fig. 8 is a schematic structural diagram of another display panel according to an embodiment of the present invention;

FIG. 9 is a schematic cross-sectional view of FIG. 8 along the direction D-D';

fig. 10 is a schematic structural diagram of another display panel according to an embodiment of the present invention;

FIG. 11 is a schematic cross-sectional view of FIG. 8 along E-E';

FIG. 12 is a schematic cross-sectional view of the structure of FIG. 4 along the direction F-F';

FIG. 13 is a schematic view of another cross-sectional structure along the direction F-F' of FIG. 4;

fig. 14 is a schematic structural diagram of a display device according to an embodiment of the present invention.

Detailed Description

The invention is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present invention are shown in the drawings.

Fig. 1 is a schematic structural view of a display panel according to an embodiment of the present invention, fig. 2 is an enlarged structural view of the display panel at the area a of fig. 1, fig. 3 is a schematic structural view of the display panel along the direction B-B' of fig. 2, and as shown in fig. 1-3, the display panel according to an embodiment of the present invention includes adisplay area 10, thedisplay area 10 includes afingerprint identification area 11, anon-fingerprint identification area 12 and a plurality ofpixels 13, wherein thefingerprint identification area 11 includes afingerprint identification unit 111. Thepixels 13 located in thefingerprint recognition area 11 include afirst subpixel 131 emitting a first color light and asecond subpixel 132 emitting a second color light, thefirst subpixel 131 being multiplexed as a fingerprint recognition light source. Thepixels 13 located in thenon-fingerprint recognition region 12 include athird subpixel 133 emitting light of a first color and afourth subpixel 134 emitting light of a second color, the light emitting area of thefirst subpixel 131 is larger than the light emitting area of thethird subpixel 133, and the shortest distance D1 between thefirst subpixel 131 and thesecond subpixel 132 is less than or equal to the shortest distance D2 between thethird subpixel 133 and thefourth subpixel 134. The display panel further comprises asubstrate 20, thefingerprint identification area 11 further comprises alight transmission area 31, and the vertical projection of thelight transmission area 31 on thesubstrate 20 covers the vertical projection of thefingerprint identification unit 111 on thesubstrate 20, and the light transmission rate of thelight transmission area 31 is larger than that of thenon-fingerprint identification area 12.

Specifically, the working process of the display panel provided by the embodiment of the present invention includes a fingerprint identification stage and a non-fingerprint identification stage, and in the fingerprint identification stage, in order to ensure the fingerprint identification effect of thefingerprint identification unit 111 in thefingerprint identification area 11, the brightness of thefirst sub-pixel 131 multiplexed as the fingerprint identification light source tends to be increased. Therefore, by increasing the light emitting area of thefirst sub-pixel 131, the current density of thefirst sub-pixel 131 can be effectively reduced, thereby reducing the lifetime attenuation of thefirst sub-pixel 131 and improving the pixel lifetime of thefingerprint recognition area 11.

In the non-fingerprint recognition stage, since the light emitting area of thefirst sub-pixel 131 is larger than the light emitting area of thethird sub-pixel 133 of thenon-fingerprint recognition region 12, the current density of thefirst sub-pixel 131 is smaller than that of thethird sub-pixel 133 at the same brightness, so that in the non-fingerprint recognition stage, the lifetime degradation of thefirst sub-pixel 131 is smaller than that of thethird sub-pixel 133, thereby reducing the difference between the lifetime degradation of thefirst sub-pixel 131 multiplexed as thefingerprint recognition unit 111 and the lifetime degradation of thethird sub-pixel 133, so that the lifetime degradation of thefirst sub-pixel 131 and thethird sub-pixel 133 as a whole tends to be uniform, and the problem of uneven display is improved.

Meanwhile, by setting the light emitting area of thefirst sub-pixel 131 multiplexed as the fingerprint identification light source to be larger than the light emitting area of thethird sub-pixel 133, the light emitting current of thefirst sub-pixel 131 can be properly increased in the fingerprint identification stage, so as to increase the light intensity emitted by thefirst sub-pixel 131, further increase the light flux received by thefingerprint identification unit 111, improve the problem that the service life attenuation of the pixel multiplexed as the fingerprint identification light source is faster than that of other pixels due to the increase of the current density of the fingerprint identification light source in the prior art, and improve the sensitivity of fingerprint identification of thefingerprint identification area 11.

In addition, thelight transmission area 31 is arranged above thefingerprint identification unit 111 of thefingerprint identification area 11, and the light transmittance of thelight transmission area 31 is larger than that of thenon-fingerprint identification area 12, so that the light flux received by thefingerprint identification unit 111 is further increased, the fingerprint identification sensitivity of thefingerprint identification area 11 is improved, and the yield of the display panel is improved.

In the display panel provided by the embodiment of the invention, the light emitting area of thefirst sub-pixel 131 multiplexed as the fingerprint identification light source is larger than the light emitting area of thethird sub-pixel 133, so that the current density of thefirst sub-pixel 131 is effectively reduced by increasing the light emitting area of thefirst sub-pixel 131 in the fingerprint identification stage, the service life attenuation of thefirst sub-pixel 131 is reduced, and the problem of uneven display is solved. Further, thelight transmission area 31 is arranged above thefingerprint identification unit 111 of thefingerprint identification area 11, and the light transmittance of thelight transmission area 31 is larger than that of thenon-fingerprint identification area 12, so that the light flux received by thefingerprint identification unit 111 is further increased, and the sensitivity of fingerprint identification of thefingerprint identification area 11 is improved.

Fig. 4 is a schematic structural diagram of another display panel according to an embodiment of the present invention, as shown in fig. 4, optionally, the light emitting area of thesecond subpixel 132 is equal to or greater than the light emitting area of thefourth subpixel 134.

In the fingerprint identification stage, thefirst sub-pixel 131 and thesecond sub-pixel 132 can be multiplexed into a fingerprint identification light source, so that the light emitting area of the fingerprint identification light source in the fingerprint identification stage is increased, on one hand, under the condition that the light emitting current of the fingerprint identification light source is kept unchanged, the number of the fingerprint identification light sources is increased, the light flux received by thefingerprint identification unit 111 can be increased, and the sensitivity of fingerprint identification of thefingerprint identification area 11 is improved; on the other hand, by increasing the number of fingerprint recognition light sources, the light emission current of the fingerprint recognition light sources can be appropriately reduced, thereby further reducing the life decay of the fingerprint recognition light sources while ensuring the fingerprint recognition sensitivity of thefingerprint recognition unit 111 in thefingerprint recognition area 11. By way of example, as shown in fig. 2, by setting the light emitting area of thesecond subpixel 132 to be larger than the light emitting area of thefourth subpixel 134, the light emitting area of thesecond subpixel 132 in the fingerprint recognition stage is increased, and under the condition that the light emitting current of the fingerprint recognition light source is kept unchanged, the light emitting area of the fingerprint recognition light source in the fingerprint recognition stage is further increased, and the sensitivity of fingerprint recognition in thefingerprint recognition region 11 is improved.

With continued reference to fig. 4, optionally, thepixel 13 in thefingerprint recognition area 11 further includes afifth subpixel 135 emitting light of a third color, and the pixel in thenon-fingerprint recognition area 12 further includes asixth subpixel 136 emitting light of the third color, and the light emitting area of thefifth subpixel 135 is equal to or larger than the light emitting area of thesixth subpixel 136.

For example, as shown in fig. 4, the first, second and third color lights may be green, red and blue, respectively, thereby realizing a color display. In the fingerprint identification stage, thefirst sub-pixel 131, thesecond sub-pixel 132 and thefifth sub-pixel 135 can be multiplexed into the fingerprint identification light source, so that the light emitting area of the fingerprint identification light source in the fingerprint identification stage is increased, the fingerprint identification effect of thefingerprint identification unit 111 in thefingerprint identification area 11 is ensured, the light emitting area of thefifth sub-pixel 135 is larger than the light emitting area of thesixth sub-pixel 136, the light emitting area of thefifth sub-pixel 135 in the fingerprint identification stage is increased, the light emitting area of the fingerprint identification light source in the fingerprint identification stage is further increased, and the fingerprint identification sensitivity of thefingerprint identification area 11 is improved.

Fig. 5 is a schematic structural diagram of a fingerprint identification area according to an embodiment of the present invention, and as shown in fig. 5, optionally, at least twofirst sub-pixels 131 are adjacent.

Specifically, as shown in fig. 3, thepixel 13 includes a pixellight emitting unit 21 and apixel driving circuit 22, the pixellight emitting unit 21 includes ananode 211, an organiclight emitting layer 212, and acathode 213, when the shortest distance D1 between thefirst sub-pixel 131 and thesecond sub-pixel 132 is smaller than the shortest distance D2 between thethird sub-pixel 133 and thefourth sub-pixel 134, at the time of preparing the organiclight emitting layer 212, since the shortest distance between thefirst sub-pixel 131 and thesecond sub-pixel 132 is smaller, color mixing occurs between thefirst sub-pixel 131 and thesecond sub-pixel 132 during vapor deposition, as shown in fig. 5, by disposing a portion of thefirst sub-pixels 131 adjacent to each other, D1 can be made equal to D2, while reducing the distance D2 between thefirst sub-pixel 131 and thesecond sub-pixel 132 by reducing the distance between the adjacent twofirst sub-pixels 131, the risk of color mixing at the time of vapor deposition of different colors is reduced.

Fig. 6 is a schematic structural diagram of another fingerprint recognition area provided in the embodiment of the present invention, and fig. 7 is a schematic structural diagram of a cross section of fig. 6 along the direction of C-C', as shown in fig. 6 and fig. 7, further, when the organiclight emitting layer 212 is manufactured, the adjacentfirst sub-pixels 131 may share one mask opening, and at this time, twopixel driving circuits 22 of the adjacentfirst sub-pixels 131 drive one pixellight emitting unit 21.

With continued reference to fig. 4, optionally, thepixels 13 include pixellight emitting elements 21, and the density of pixellight emitting elements 21 of thefingerprint recognition area 11 is equal to the density of pixellight emitting elements 21 of thenon-fingerprint recognition area 12.

Wherein, by setting the density of the pixellight emitting units 21 of thefingerprint identification area 11 equal to the density of the pixellight emitting units 21 of thenon-fingerprint identification area 12, the resolution of thefingerprint identification area 11 is consistent with that of thenon-fingerprint identification area 12, thereby ensuring the display effect of the display panel.

Fig. 8 is a schematic structural diagram of another display panel according to an embodiment of the present invention, as shown in fig. 8, optionally, the light emitting area of thesecond sub-pixel 132 is smaller than the light emitting area of thefourth sub-pixel 134, and the shortest distance D1 between thefirst sub-pixel 131 and thesecond sub-pixel 132 is equal to the shortest distance D2 between thethird sub-pixel 133 and thefourth sub-pixel 134.

By setting the light emitting area of thesecond subpixel 132 smaller than the light emitting area of thefourth subpixel 134, the shortest distance D1 between thefirst subpixel 131 and thesecond subpixel 132 is not reduced due to the increase of thefirst subpixel 131, so that the light transmitting area of thefingerprint identification area 11 is ensured, and the process difficulty is not increased while the fingerprint identification effect is ensured.

Fig. 9 is a schematic cross-sectional view of fig. 8 along direction D-D', and as shown in fig. 9, thepixel 13 may optionally include apixel driving circuit 22, and at least twosecond sub-pixels 132 located in thefingerprint recognition area 11 are electrically connected to the samepixel driving circuit 22.

Specifically, when the light emitting area of thesecond sub-pixel 132 is reduced, the lifetime attenuation of thesecond sub-pixel 132 may be increased, and by setting at least twosecond sub-pixels 132 located in thefingerprint recognition area 11 to be electrically connected to the samepixel driving circuit 22, the current density of thesecond sub-pixel 132 is reduced, so that the lifetime attenuation of thesecond sub-pixel 132 is reduced, and the lifetime attenuation of thesecond sub-pixel 132 and the lifetime attenuation of thefourth sub-pixel 134 are consistent as a whole, thereby improving the problem of uneven display. Meanwhile, since the at least twosecond sub-pixels 132 are electrically connected with the samepixel driving circuit 22, shielding of the pixel circuit to fingerprint recognition light can be reduced in the fingerprint recognition area, the light transmission area of the fingerprint recognition area can be increased, and the fingerprint recognition effect can be improved.

Fig. 10 is a schematic structural diagram of another display panel according to an embodiment of the present invention, as shown in fig. 3 and 10, optionally, the display panel according to an embodiment of the present invention further includes anencapsulation layer 23, and afirst metal layer 24 located between thesubstrate 20 and theencapsulation layer 23, where thefirst metal layer 24 includes a plurality of signal lines, and in the light-transmittingarea 31, thefirst metal layer 24 includes a hollowed-out area 241, and a vertical projection of the hollowed-out area 241 on thesubstrate 20 at least covers a vertical projection of thefingerprint identification unit 111 on thesubstrate 20.

For example, in order to reduce the impedance of the signal line, the display panel may adopt a mode of setting a dual-layer wiring in parallel to transmit an electrical signal, that is, setting two metal layers to transmit an electrical signal, as shown in fig. 3 and fig. 10, in the display panel provided by the embodiment of the invention, thefirst metal layer 24 may be any one of the two metal layers, no metal is set above thefingerprint identification unit 111 in thefingerprint identification area 11, that is, thefirst metal layer 24 has a hollow part at thefingerprint identification area 11, the front projection of the metal wiring in thefirst metal layer 24 on the substrate and the front projection of thefingerprint identification area 11 on the substrate do not overlap, so that the transmittance of the film layer above thefingerprint identification unit 111 is improved, thereby increasing the luminous flux received by thefingerprint identification unit 111 in the fingerprint identification stage, and improving the sensitivity of fingerprint identification of thefingerprint identification area 11. Theencapsulation layer 23 may be a rigid encapsulation layer such as a glass cover plate, or may be a thin film encapsulation layer, which is not limited in the embodiment of the present invention.

In other embodiments, thefirst metal layer 24 may be any one or more metal layers in the display panel, and those skilled in the art can set any metal layer according to practical requirements, so long as the number of metal layers above thefingerprint recognition unit 111 can be reduced.

With continued reference to fig. 3, optionally, the display panel provided in the embodiment of the present invention further includes a first insulatinglayer 25 located between thesubstrate 20 and theencapsulation layer 23, where the first insulatinglayer 25 located in the light-transmittingregion 31 includes a groove structure or a via structure, and a vertical projection of the groove structure or the via structure on thesubstrate 20 at least partially overlaps with a vertical projection of thefingerprint recognition unit 111 on thesubstrate 20.

As illustrated in fig. 3, the first insulatinglayer 25 is a pixel defining layer for preventing color mixing between the pixellight emitting units 21 and improving light emitting performance of the pixellight emitting units 21. By arranging thegroove structure 251 on the first insulatinglayer 25 above thefingerprint identification unit 111, the thickness of the first insulatinglayer 25 is reduced, so that the transmittance of the film layer above thefingerprint identification unit 111 is improved, the luminous flux received by thefingerprint identification unit 111 in the fingerprint identification stage is increased, and the sensitivity of fingerprint identification of thefingerprint identification area 11 is improved.

In other embodiments, the first insulatinglayer 25 may be any one or more insulating layers in the display panel, such as one or more of thegate insulating layer 26, theinterlayer insulating layer 27, and theplanarization layer 28 in fig. 3. The shape of the groove structure or the through hole structure can be set arbitrarily according to actual requirements, and the light transmittance of the film layer can be increased.

Fig. 11 is a schematic cross-sectional structure along the direction E-E' of fig. 8, and as shown in fig. 11, optionally, thefirst sub-pixel 131 includes afirst electrode 411, and a firstpixel driving circuit 42 located between thesubstrate 20 and thefirst electrode 411, where the firstpixel driving circuit 42 is connected to thefirst electrode 411, and the firstpixel driving circuit 42 includes afirst capacitor 421, and a vertical projection of thefirst electrode 411 on thesubstrate 20 covers a vertical projection of thefirst capacitor 421 on thesubstrate 20.

Specifically, as shown in fig. 11, taking an organic light-emitting display panel as an example, thefirst sub-pixel 131 includes a first pixel light-emittingunit 41 and a firstpixel driving circuit 42, the first pixel light-emittingunit 41 includes afirst anode 411, a first organic light-emittinglayer 412 and afirst cathode 413, the firstpixel driving circuit 42 is connected with thefirst electrode 411, the firstpixel driving circuit 42 includes afirst capacitor 421, and by setting thefirst capacitor 421 below thefirst electrode 411, thefirst capacitor 421 is prevented from shielding light above thefingerprint identification unit 111, the shielding of thefirst capacitor 421 to light is reduced, the light transmittance of thefingerprint identification area 11 is increased, the display panel space occupied by the pixel driving circuit is optimized, and the sensitivity of fingerprint identification of thefingerprint identification area 11 is improved.

Note that all thepixels 13 located in thefingerprint recognition area 11 may have their capacitances in the pixel driving circuits disposed under the anode, thereby further increasing the light transmittance of thelight transmitting area 31.

In this case, as the light emitting area of thefirst sub-pixel 131 increases, it is understood that the pixel anode increases accordingly. Other wires can be arranged below thefirst anode 411, so that the transmittance of the film layer above thefingerprint identification unit 111 is further improved, and similarly, the metal wires can be arranged below the anode of anypixel 13 in thefingerprint identification area 11 to improve the transmittance of the display panel, and a person skilled in the art can lay out the wires according to actual requirements.

With continued reference to fig. 2 and 3, optionally, the vertical projection of thefingerprint recognition unit 111 onto thesubstrate 20 does not overlap with the vertical projection of thepixels 13 onto thesubstrate 20.

Since the area between the pixellight emitting units 21 is an area for transmitting light, fingerprint recognition is facilitated by disposing thefingerprint recognition unit 111 in the area between the pixellight emitting units 21 in thefingerprint recognition area 11.

Alternatively, thefingerprint recognition unit 111 is an externally hung fingerprint recognition unit, or thefingerprint recognition unit 111 is a built-in fingerprint recognition unit.

As illustrated in fig. 2, thefingerprint recognition unit 111 is an off-hook fingerprint recognition unit, and thefingerprint recognition unit 111 is located on a side of thesubstrate 20 facing away from the pixellight emitting unit 21.

In other embodiments, as shown in fig. 11, thefingerprint recognition unit 111 is a built-in fingerprint recognition unit, and thefingerprint recognition unit 111 is located on the side of thesubstrate 20 facing the pixellight emitting unit 21.

Optionally, the first color light is green light.

In the organic light emitting display panel, the lifetime of the green light emitting pixel is the longest, and therefore, thefirst sub-pixel 131 emitting green light is multiplexed as a fingerprint recognition light source, so that the lifetime attenuation of thefirst sub-pixel 131 and the lifetime attenuation of the sub-pixels emitting other colors of light tend to be consistent as a whole, thereby improving the problem of uneven display.

It should be noted that, the display panel provided in any of the above embodiments may be an organic light emitting display panel or a liquid crystal display panel.

For example, fig. 12 is a schematic cross-sectional structure along the direction F-F' of fig. 4, as shown in fig. 12, when the display panel is an organic light emitting display panel, thefirst sub-pixel 131 includes thefirst anode 51 and the first organic light emittingmaterial layer 52, thesecond sub-pixel 132 includes thesecond anode 53 and the second organic light emittingmaterial layer 54, wherein the coverage area of thefirst anode 51 is larger than the coverage area of thesecond anode 53, and the coverage area of the first organic light emittingmaterial layer 52 is larger than the coverage area of the second organic light emittingmaterial layer 54, so that the light emitting area of thefirst sub-pixel 131 is larger than the light emitting area of thesecond sub-pixel 132, and the light emitting area of anypixel 13 in the display panel can be set based on the same principle.

Fig. 13 is a schematic cross-sectional structure along the direction F-F' of fig. 4, as shown in fig. 13, when the display panel is a liquid crystal display panel, thefirst subpixel 131 includes thefirst pixel electrode 61, thesecond subpixel 132 includes thesecond pixel electrode 62, the display panel further includes the color resistlayer 71, the color resistlayer 71 includes the first color resistunit 711 and the second color resistunit 712, the vertical projection of the first color resistunit 711 on the plane of thefirst pixel electrode 61 at least partially overlaps thefirst pixel electrode 61, the vertical projection of the second color resistunit 712 on the plane of thesecond pixel electrode 62 at least partially overlaps thesecond pixel electrode 62, wherein the coverage area of thefirst pixel electrode 61 is larger than the coverage area of thesecond pixel electrode 62, and the coverage area of the first color resistunit 711 is larger than the coverage area of the second color resistunit 712, so that the light emitting area of thefirst subpixel 131 is larger than the light emitting area of thesecond subpixel 132 can be set according to the same principle.

According to the display panel provided by the embodiment of the invention, the luminous area of thefirst sub-pixel 131 multiplexed as the fingerprint identification light source is larger than the luminous area of thethird sub-pixel 133, so that the luminous area of thefirst sub-pixel 131 is increased in the fingerprint identification stage, the luminous flux received by thefingerprint identification unit 111 is increased, and the light transmittance of thelight transmittance region 31 is larger than the light transmittance of thenon-fingerprint identification region 12 by arranging thelight transmittance region 31 above thefingerprint identification unit 111 of thefingerprint identification region 11, so that the luminous flux received by thefingerprint identification unit 111 is further increased, and the sensitivity of fingerprint identification of thefingerprint identification region 11 is improved. By arranging the hollowed-out area 241 on thefirst metal layer 24 of the light-transmittingarea 31 and/or arranging the groove structure or the through hole structure on the first insulatinglayer 25 of the light-transmittingarea 31, the transmittance of the film layer above thefingerprint identification unit 111 is improved, so that the luminous flux received by thefingerprint identification unit 111 in the fingerprint identification stage is increased, and the sensitivity of fingerprint identification of thefingerprint identification area 11 is improved.

Based on the same inventive concept, the embodiment of the present invention further provides a display device, and fig. 14 is a schematic structural diagram of the display device provided by the embodiment of the present invention, as shown in fig. 14, where thedisplay device 80 includes adisplay panel 81 according to any embodiment of the present invention, so that thedisplay device 80 provided by the embodiment of the present invention has the technical effects of the technical solution in any embodiment, and the same or corresponding structure and explanation of terms as those of the embodiment are not repeated herein. Thedisplay device 80 provided in the embodiment of the present invention may be a mobile phone as shown in fig. 14, or any electronic product with a display function, including but not limited to the following categories: television, notebook computer, desktop display, tablet computer, digital camera, smart bracelet, smart glasses, vehicle-mounted display, medical equipment, industrial control equipment, touch interactive terminal, etc., which are not particularly limited in this embodiment of the invention.

Note that the above is only a preferred embodiment of the present invention and the technical principle applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, while the invention has been described in connection with the above embodiments, the invention is not limited to the embodiments, but may be embodied in many other equivalent forms without departing from the spirit or scope of the invention, which is set forth in the following claims.

Claims (11)

1. A display panel, comprising a display area, wherein the display area comprises a fingerprint identification area, a non-fingerprint identification area and a plurality of pixels;

the fingerprint identification area comprises a fingerprint identification unit;

the pixels in the fingerprint identification area comprise a first sub-pixel emitting light of a first color and a second sub-pixel emitting light of a second color, and the first sub-pixel is multiplexed into a fingerprint identification light source; the pixels in the non-fingerprint identification area comprise a third sub-pixel emitting light of a first color and a fourth sub-pixel emitting light of a second color; the light emitting area of the first sub-pixel is larger than the light emitting area of the third sub-pixel, and the shortest distance between the first sub-pixel and the second sub-pixel is smaller than or equal to the shortest distance between the third sub-pixel and the fourth sub-pixel;

the display panel further comprises a substrate base plate, and the fingerprint identification area further comprises a light transmission area; the vertical projection of the light transmission area on the substrate base plate covers the vertical projection of the fingerprint identification unit on the substrate base plate; the light transmittance of the light-transmitting area is larger than that of the non-fingerprint identification area;

the light emitting area of the second sub-pixel is smaller than the light emitting area of the fourth sub-pixel, and the shortest distance between the first sub-pixel and the second sub-pixel is equal to the shortest distance between the third sub-pixel and the fourth sub-pixel.

2. The display panel of claim 1, wherein the pixels in the fingerprint recognition area further comprise fifth subpixels that emit a third color light; the pixel in the non-fingerprint identification area further comprises a sixth sub-pixel emitting a third color light; the light emitting area of the fifth subpixel is equal to or greater than the light emitting area of the sixth subpixel.

3. A display panel according to claim 1 or 2, wherein at least two of the first sub-pixels are adjacent.

4. The display panel of claim 1, wherein the pixels comprise pixel light emitting cells, and wherein a density of pixel light emitting cells of the fingerprint recognition area is equal to a density of pixel light emitting cells of the non-fingerprint recognition area.

5. The display panel of claim 1, wherein the pixel comprises a pixel driving circuit, and at least two of the second sub-pixels located in the fingerprint recognition area are electrically connected to the same pixel driving circuit.

6. The display panel of claim 1, further comprising an encapsulation layer, and a first metal layer between the substrate base and encapsulation layer, the first metal layer comprising a plurality of signal lines; in the light-transmitting area, the first metal layer comprises a hollowed-out area;

and the vertical projection of the hollowed-out area on the substrate at least covers the vertical projection of the fingerprint identification unit on the substrate.

7. The display panel of claim 1, further comprising a first insulating layer between the substrate base plate and the encapsulation layer, the first insulating layer at the light-transmitting region comprising a groove structure or a via structure;

the perpendicular projection of the groove structure or the through hole structure on the substrate is at least partially overlapped with the perpendicular projection of the fingerprint identification unit on the substrate.

8. The display panel of claim 1, wherein the first subpixel comprises a first electrode, and a first pixel driving circuit between the substrate and the first electrode, the first pixel driving circuit being connected to the first electrode; the first pixel driving circuit comprises a first capacitor, and the vertical projection of the first electrode on the substrate covers the vertical projection of the first capacitor on the substrate.

9. The display panel of claim 1, wherein the fingerprint recognition unit is a plug-in fingerprint recognition unit or the fingerprint recognition unit is a built-in fingerprint recognition unit.

10. The display panel of claim 1, wherein the first color light is green light.

11. A display device comprising the display panel of any one of claims 1-10.

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