CN110767709B

CN110767709B - Display panel, display screen and display device

Info

Publication number: CN110767709B
Application number: CN201910107579.4A
Authority: CN
Inventors: 楼均辉; 聂田
Original assignee: Yungu Guan Technology Co Ltd
Current assignee: Yungu Guan Technology Co Ltd
Priority date: 2019-02-02
Filing date: 2019-02-02
Publication date: 2022-02-08
Anticipated expiration: 2039-02-02
Also published as: CN110767709A

Abstract

The invention discloses a display panel, a display screen and a display device, wherein an optical sensing device can be arranged in the lower part of a display structure of the panel and used for realizing a fingerprint detection function, and the display structure comprises: the display device comprises a plurality of first light-emitting groups, a plurality of second light-emitting groups and a plurality of control circuits, wherein each light-emitting group comprises a plurality of first type sub-pixels, each first type sub-pixel comprises a first transparent region and a first light-emitting region, the first light-emitting regions of the adjacent first type sub-pixels are not adjacent, and the first light-emitting regions of the adjacent first type sub-pixels in the adjacent light-emitting groups are not adjacent; and/or a plurality of second light-emitting groups, wherein each light-emitting group comprises a second transparent area and a second light-emitting area, the second light-emitting area comprises a plurality of second type sub-pixels which are closely adjacent, the second type sub-pixels do not comprise a light-transmitting area, and the maximum size of the second light-emitting area pattern is smaller than the maximum blank space allowed when the fingerprint detection function is realized. The panel can disperse the shadow gathering brought by the opaque luminous area, and improves the fingerprint identification precision to a certain extent.

Description

Display panel, display screen and display device

Technical Field

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

Background

With the rapid development of display terminals, fingerprint identification sensors are increasingly applied to display terminals. The fingerprint is the line that finger surface skin is unsmooth and forms, has the characteristics of uniqueness, stability, can realize identification through the fingerprint in view of the above, and fingerprint identification sensor carries out authentication to the user as the fingerprint of the discernment user that a photoelectric sensor can be accurate, consequently, has all set up fingerprint identification sensor on more and more display terminals. For example, a fingerprint sensor is widely used for unlocking a screen of a mobile terminal such as a mobile phone. In order to realize a full-screen mobile terminal such as a mobile phone, a fingerprint identification sensor is arranged under a screen, however, the fingerprint identification sensor under the screen in the prior art has the problem of low detection sensitivity.

Disclosure of Invention

In view of this, embodiments of the present invention provide a display panel and a display device to solve the problem of low detection sensitivity of an underscreen fingerprint identification sensor.

Therefore, the embodiment of the invention provides the following technical scheme:

according to a first aspect, an embodiment of the present invention provides a display panel, in which an optical sensor device may be disposed inside a lower portion of a display structure of the display panel, so as to implement a fingerprint detection function, where the display structure includes:

a plurality of first light-emitting groups, wherein each light-emitting group comprises a plurality of first type sub-pixels, each first type sub-pixel comprises a first transparent region and a first light-emitting region, the first light-emitting regions of the adjacent first type sub-pixels are not adjacent, and the first light-emitting regions of the adjacent first type sub-pixels in the adjacent light-emitting groups are not adjacent; and/or the presence of a gas in the gas,

and each light-emitting group comprises a second transparent area and a second light-emitting area, the second light-emitting area comprises a plurality of second type sub-pixels which are closely adjacent, the second type sub-pixels do not comprise a light-transmitting area, the maximum size of the graph of the second light-emitting area is smaller than a preset size, and the preset size is the maximum blank space allowed when the fingerprint detection function is realized.

Optionally, the shape of the adjacent first type sub-pixels is different in the same first light emitting group.

Optionally, the shape of each of the first type sub-pixels comprises: circular, square, oval, diamond, polygonal, dumbbell, rectangular, or triangular.

Optionally, the shape of the first light emitting region includes: circular, square, oval, diamond, polygonal, dumbbell, rectangular, or triangular.

Optionally, in the same first type sub-pixel, the first transparent region is adjacent to the first light emitting region.

Optionally, the first transparent region completely surrounds the first light emitting region.

Optionally, the first light emitting area is located at a central position of the first type sub-pixel.

Optionally, the shape of adjacent sub-pixels of the second type is different in the same light emitting group.

Optionally, the first type sub-pixels in the same first light emitting group are arranged in a staggered manner.

Optionally, the first type of sub-pixel includes a first sub-pixel, a second sub-pixel, and a third sub-pixel, where the first sub-pixel is configured to generate a first color light, the second sub-pixel is configured to generate a second color light, and the third sub-pixel is configured to generate a third color light.

Optionally, in the same first light emitting group, the first sub-pixel, the second sub-pixel and the third sub-pixel are arranged in a line shape or a delta shape.

Optionally, when the first light emitting areas in two adjacent first light emitting groups are adjacent to each other, the shapes of the first light emitting areas of the first type sub-pixels adjacent to each other are different.

Alternatively, one first light emitting group constitutes one repeating unit, or a plurality of first light emitting groups constitutes one repeating unit.

Optionally, when a plurality of first light-emitting groups form a repeating unit, the pixel arrangement rule of each of the plurality of light-emitting groups in the repeating unit is different.

Optionally, the shape of adjacent sub-pixels of the second type is different in the same second light emitting group.

Optionally, the second-type sub-pixel comprises only a second light emitting area and no transparent area, or the shape of the second-type sub-pixel is the same as the shape of the first-type sub-pixel.

Optionally, the shape of each of the second light emitting groups includes: circular, square, oval, diamond, polygonal, dumbbell, rectangular, or triangular.

Optionally, the shape of each of the second type sub-pixels comprises: circular, square, oval, diamond, polygonal, dumbbell, rectangular, or triangular.

Optionally, the second transparent region completely surrounds the second light emitting region.

Optionally, the second light emitting area is located at a central position of the light emitting group.

Optionally, the second type sub-pixels in the same second light emitting group are arranged in a staggered manner.

Optionally, the second type of sub-pixel in the second light emitting group includes a fourth sub-pixel, a fifth sub-pixel and a sixth sub-pixel, wherein the fourth sub-pixel is used for generating the first color light, the fifth sub-pixel is used for generating the second color light, and the sixth sub-pixel is used for generating the third color light.

Optionally, the second type sub-pixels in the second light emitting group are arranged in a straight line or in a delta shape.

Alternatively, one second light emitting group constitutes one repeating unit, or a plurality of second light emitting groups constitutes one repeating unit.

Optionally, a second light-emitting group forms a repeating unit, and the shapes of the second type sub-pixels in the same second light-emitting group are all different.

Alternatively, when a plurality of second light emission groups constitute one repeating unit, the pixel arrangement of each of the plurality of light emission groups in one repeating unit is different.

Optionally, the plurality of repeating units are arranged in an array in which a plurality of repeating units of the i-th row are arranged in contact; a plurality of repeating units of an i +1 th row are arranged in contact and are arranged in a staggered manner with respect to the repeating units of the i-th row; the arrangement of the plurality of repeating units in the (i + 2) th row is the same as the arrangement of the plurality of repeating units in the i-th row.

Optionally, the method further comprises: a substrate, a pixel circuit layer and a pixel defining layer which are arranged in a stacked manner; the display area is disposed in an opening of the pixel defining layer; the arrangement position of the optical sensing device is any one of the following positions: a side of the substrate facing away from the pixel circuit layer, between the substrate and the pixel circuit layer, between the pixel circuit layer and the pixel defining layer, or a side of the pixel defining layer facing away from the pixel circuit layer.

Optionally, the optical sensing device acts as a pixel defining layer.

According to a second aspect, an embodiment of the present invention provides a display screen, including at least: a photosensitive region and a non-photosensitive region; both the photosensitive area and the non-photosensitive area can be used for displaying static or dynamic pictures; the display panel of any one of the first aspect is disposed in the photosensitive region, and the display panel disposed in the non-photosensitive region is a PMOLED display panel or an AMOLED display panel.

According to a third aspect, an embodiment of the present invention provides a display device, including: a display screen as described in the second aspect above.

The technical scheme of the invention has the following beneficial effects:

1. the non-light-transmitting areas (light-emitting areas) of each display panel are dispersed, so that the fingerprint lines mapped to the fingerprint identification sensor are scattered and lost in a small area, the detected lost part of each section of the fingerprint is smaller than the maximum blank space allowed when the fingerprint detection function is realized by the optical sensing device, more accurate data can be provided for the subsequent compensation of the lost part through an algorithm, and the subsequent compensation of the lost fingerprint lines is facilitated, for example, the scattered shadow areas (in the fingerprint detection process, the fingerprint lines detected in the area are shadow due to the light-tightness of the light-emitting areas) and the acquired trends of the fingerprint in the transparent areas can be more accurately obtained, and then the loss can be more accurately compensated, such as the fuzzy identification algorithm is adopted, and the fingerprint identification precision can be greatly improved.

2. Setting the optical sensing device in any one of the following positions: compared with an optical sensor arranged at the bottom of a display panel, the arrangement position of the substrate on one side departing from the pixel circuit layer, between the substrate and the pixel circuit layer, between the pixel circuit layer and the pixel limiting layer, or on one side departing from the pixel circuit layer of the pixel limiting layer reduces the number of film layers penetrated by external light, so that the optical sensor can acquire more external light, the light loss is reduced, the sensitivity of an optical sensing device is improved, and particularly, the detection sensitivity of the fingerprint identification sensor is remarkably improved when the fingerprint identification sensor is used.

3. The optical sensing device (such as a fingerprint identification sensor) is used as the pixel limiting layer, so that the pixel limiting layer does not need to be prepared, the process flow is saved, and the production cost is reduced. And the sensing material layer is used as the pixel limiting layer, so that light received by the fingerprint sensor can pass through fewer film layers, the light receiving efficiency is improved, and fingerprints can be identified more accurately.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

Fig. 1 is a schematic view showing a specific example of a display structure of a display panel according to an embodiment of the present invention;

fig. 2 is a schematic view showing another specific example of the display structure of the display panel according to the embodiment of the present invention;

fig. 3 is a schematic view showing another specific example of the display structure of the display panel according to the embodiment of the present invention;

fig. 4 is a schematic view showing another specific example of the display structure of the display panel according to the embodiment of the present invention;

fig. 5 is a schematic view showing another specific example of the display structure of the display panel according to the embodiment of the present invention;

fig. 6 is a schematic view showing another specific example of the display structure of the display panel according to the embodiment of the present invention;

fig. 7 is a schematic view showing another specific example of the display structure of the display panel according to the embodiment of the present invention;

fig. 8 is a schematic view showing another specific example of the display structure of the display panel according to the embodiment of the present invention;

fig. 9 is a schematic view showing another specific example of the display structure of the display panel according to the embodiment of the present invention;

fig. 10 is a schematic view showing another specific example of the display structure of the display panel according to the embodiment of the present invention;

fig. 11 is a schematic view showing another specific example of the display structure of the display panel according to the embodiment of the present invention;

fig. 12 is a schematic view showing another specific example of the display structure of the display panel according to the embodiment of the present invention;

fig. 13 is a schematic view showing another specific example of the display structure of the display panel according to the embodiment of the present invention;

fig. 14 is a schematic view showing another specific example of the display structure of the display panel according to the embodiment of the present invention;

fig. 15 is a schematic view showing another specific example of the display structure of the display panel according to the embodiment of the present invention;

fig. 16 is a schematic view showing another specific example of the display structure of the display panel according to the embodiment of the present invention;

fig. 17 is a schematic view showing another specific example of the display structure of the display panel according to the embodiment of the present invention;

fig. 18 is a schematic view showing another specific example of the display structure of the display panel according to the embodiment of the present invention;

FIG. 19 is a schematic partial cross-sectional view of a display panel according to an embodiment of the invention;

FIG. 20 is a schematic view of a display device according to an embodiment of the invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. 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.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; the two elements may be directly connected or indirectly connected through an intermediate medium, or may be communicated with each other inside the two elements, or may be wirelessly connected or wired connected. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

As described in the background, a fingerprint sensor is an optical sensing device that requires sufficient incident light to generate a stable signal. Taking a mobile phone as an example, a current fingerprint identification sensor is usually disposed at one side of a mobile phone screen and exposed outside the screen, so that the mobile phone is difficult to realize a full screen, and another fingerprint identification sensor is disposed below the display screen to realize the fingerprint identification under the screen, however, the current display screen has higher and higher pixel density (Pixels Per Inch, PPI), even though the screen has a certain light transmittance, under the display screen with high PPI, the less and less transmitted light will cause the fingerprint identification sensor under the screen to be unable to accurately acquire fingerprint information, so that it is difficult to accurately identify fingerprints, and through research by the inventor, the existing display screen includes a plurality of display areas (Pixels), usually the display areas are light-emitting areas and do not have light transmittance, transparent areas exist between the display areas, which can transmit light, but the arrangement of the display areas is concentrated, and the arrangement of the light-tight areas is concentrated, the area of the shadow is concentrated, and then the shadow concentrated by a large area exists on the fingerprint identification sensor, and the large-area loss in the fingerprint texture concentration mapped to the fingerprint identification sensor is caused, so that the fingerprint is difficult to accurately identify. Accordingly, the inventors provide a display panel to improve the recognition accuracy of an off-screen fingerprint recognition sensor.

The present embodiment provides a display panel, in which an optical sensing device may be disposed inside a lower portion of a display structure, as shown in fig. 1, the display structure includes: a plurality of first light emitting groups 1, each first light emitting group 1 comprising a plurality of first type sub-pixels 2, each first type sub-pixel 2 comprising a first transparent region 21 and a first light emitting region 22, the first light emitting regions 22 of adjacent first type sub-pixels 2 being not adjacent, and the first light emitting regions 22 of adjacent first type sub-pixels 2 in adjacent first light emitting groups 1 being not adjacent;

and/or, as shown in fig. 2, the display structure comprises: a plurality of second light emitting groups 3, each second light emitting group 3 including a second transparent region 31 and a second light emitting region 32, the second light emitting region 32 including a plurality of second type sub-pixels 4 closely adjacent to each other, the second type sub-pixels 4 not including a light transmitting region, a maximum size of a pattern of the second light emitting region 32 being smaller than a preset size, the preset size being a maximum blank space allowed when a fingerprint detection function is implemented.

In an embodiment, the preset size is the maximum blank space allowed when the fingerprint detection function is realized, the maximum blank spaces corresponding to the optical sensing devices with different detection precisions are different, and different compensation algorithms and compensation precisions also correspond to different maximum blank spaces, so that the specific value of the maximum blank space is determined according to the optical sensing devices arranged below the display panel, the adopted compensation algorithm, the algorithm compensation precision and other factors, and can be reasonably set according to needs.

In one embodiment, an optical sensing device may be disposed below the display structure, and the optical sensing device may be a fingerprint recognition sensor; of course, in other embodiments, the optical sensing device may also be other sensing devices capable of implementing a fingerprint detection function, and may also be an image sensor, for example, an off-screen camera may also be disposed below the display structure.

It should be noted that the display structure in this embodiment may be as shown in fig. 1, and only includes a plurality of first light emitting groups; as shown in fig. 2, only the plurality of second light emitting groups may be included; the light-emitting device can also comprise the first light-emitting group and the second light-emitting group, and the number and the arrangement mode of the first light-emitting group and the second light-emitting group are also various. In practical applications, a person skilled in the art can use the above first light emitting group and the second light emitting group in any combination according to the description of the above embodiments, and the first light emitting group and the second light emitting group can be combined with each other as long as they do not conflict with each other, and the embodiments of the present invention do not limit this. In the display panel, the first light-emitting regions of adjacent first-type sub-pixels in the same first light-emitting group are not adjacent, and the first light-emitting regions of adjacent first-type sub-pixels in adjacent first light-emitting groups are also not adjacent, so that the first light-emitting regions of the first-type sub-pixels are distributed as far as possible; or, a plurality of second type sub-pixels which are closely adjacent are intensively arranged on the second luminous area of the second luminous group, so that the maximum size of the graph of the second luminous area is ensured to be smaller than the maximum blank space allowed when the fingerprint detection function is realized, and the size of the second luminous area is ensured not to influence the fingerprint identification. This display panel sets up each nontransparent zone (luminous zone) dispersion, can avoid the shade gathering that the concentrated setting that sends out the zone leads to for every section of disappearance part of fingerprint that detects all is less than the biggest blank interval that allows when optical sensing device realizes the fingerprint detection function, makes the fingerprint trend data that detect more accurate, has improved fingerprint identification's accuracy.

The first light emitting group includes a plurality of first type sub-pixels.

In the present embodiment, as shown in fig. 1, in the same first light emitting group, the adjacent first type sub-pixels 2 have different shapes; the first type sub-pixels with different shapes enable the arrangement of the first type sub-pixels in the light emitting group to be more dispersed, so that the first light emitting areas are dispersedly arranged, smaller shadows are formed in the fingerprint detection process, the shadow gathering effect caused by the opaqueness of the first light emitting areas is reduced, the fingerprint lines mapped to the optical sensing device are enabled to have smaller dispersive deletion in area, and compared with the deletion of gathering, the fingerprint identification precision can be improved to a certain extent.

In one embodiment, the shape of each sub-pixel of the first type comprises: circular, square, oval, diamond, polygonal, dumbbell-shaped, rectangular, or triangular; the first type sub-pixel in the shape is simpler and more convenient to prepare, easy to operate and higher in controllability of the preparation process. Specifically, the shape of the first-type sub-pixel may be one of the shapes listed above, the embodiment is only illustrative, and the invention is not limited thereto, and the shape of the first-type sub-pixel may be provided in other shapes besides the above shapes, such as a snowflake shape, a star shape, etc., and may be reasonably provided according to actual needs.

In one embodiment, the shape of the first light emitting region includes: circular, square, oval, diamond, polygonal, dumbbell-shaped, rectangular, or triangular; the preparation process of the first light-emitting area in the shape is simpler, more convenient and faster, is easy to operate, and has higher controllability of the preparation process. Specifically, the shape of the first light emitting area may be one of the shapes listed above, the present embodiment is only illustrative, and the present invention is not limited thereto, and the shape of the first light emitting area may be provided in other shapes, such as a snowflake shape, a star shape, etc., besides the above shape, and may be provided as appropriate according to actual needs.

Specifically, each first type sub-pixel comprises a first light-emitting area and a first transparent area, the shapes of the first type sub-pixels are various, and the shapes of the first light-emitting areas are also various; therefore, in each first-type sub-pixel, the shape of the first-type sub-pixel and the shape of the first light-emitting area may be set to be the same or different. For example, in a first type sub-pixel, the shape of the first type sub-pixel is hexagonal, and the shape of the first light-emitting area is circular, as shown in fig. 1; in a first type sub-pixel, the shape of the first type sub-pixel is square, and the shape of the first light-emitting area is triangular, as shown in fig. 3; in a first type sub-pixel, the shape of the first type sub-pixel is an ellipse, and the shape of the first light-emitting area is also an ellipse, as shown in fig. 4.

In an embodiment, in the same first type sub-pixel, the first transparent region is adjacent to the first light emitting region, and the adjacent first transparent region and the first light emitting region make the distribution of the light emitting region more dispersed, and the shadow region caused by the light emitting region is also more dispersed. As shown in fig. 5, the first transparent regions 21 and the first light-emitting regions 22 are both square, the first transparent regions 21 and the first light-emitting regions 22 are arranged in a staggered manner, and only the edge portions are adjacent; of course, in other embodiments, the positions of the first transparent region 21 and the first light-emitting region 22 can also be reasonably set according to actual needs, such as the partial enclosure of fig. 4.

In one embodiment, as shown in FIG. 3, the first transparent region completely surrounds the first light emitting region; the luminous areas are surrounded by the transparent areas, so that the interval between the adjacent luminous areas is larger, the shadow caused by the non-transparency of the luminous areas is more dispersed, the loss of each section of fingerprint is smaller in the fingerprint detection process, the loss can be compensated more accurately, and the fingerprint identification precision is improved.

In an embodiment, as shown in fig. 1, the first light-emitting area is located at a central position of the first-type sub-pixel, so that the first transparent area is more uniformly distributed in the first-type sub-pixel, and the transparent areas of the adjacent first-type sub-pixels are also relatively more uniformly distributed, thereby further reducing the aggregation degree of the light-emitting areas; and simultaneously, the preparation difficulty of the first light-emitting area is reduced. Of course, in other implementations, the first light emitting region may be disposed at the edge of the first type sub-pixel, as shown in fig. 4.

In order to reduce the aggregation of the first light-emitting areas in the same direction, the first type sub-pixels in the same first light-emitting group are arranged in a staggered mode. For example, as shown in fig. 6, the same light-emitting group includes four first-type sub-pixels, and after the four first-type sub-pixels are arranged in a staggered manner, the four first light-emitting areas do not coincide in the row direction and the column direction, so that only one light-emitting area is shaded in the row direction and the column direction, and the concentration of the shade in the same direction is reduced as much as possible. Of course, in other embodiments, the light emitting areas of the different first type sub-pixels may partially overlap in the row direction or the column direction, as shown in fig. 7, the first light emitting area partially overlaps in the row direction, and the size of the overlapping area is related to the size of the light emitting area and the distance of the misalignment, which can be reasonably determined according to practical situations.

In one embodiment, the first-type sub-pixel includes a first sub-pixel, a second sub-pixel and a third sub-pixel, wherein the first sub-pixel is used for generating a first color light, the second sub-pixel is used for generating a second color light, and the third sub-pixel is used for generating a third color light. Specifically, for ease of understanding, as shown in fig. 8, the first-type sub-pixel includes a first sub-pixel 201, a second sub-pixel 202, and a third sub-pixel 203; the first sub-pixel 201 is for generating a first color light, which may be red, for example, and is denoted by R in the figure; the second sub-pixel 202 is for generating a second color light, which may be green, for example, and is denoted by G in the figure; the third sub-pixel 203 is for generating a third color light, which may be blue, for example, and is denoted by B in the figure. Of course, in other embodiments, the first color light, the second color light, and the third color light may be other colors, such as white light, yellow light, magenta light, and the like. The first color light, the second color light, and the third color light may be lights with the same color, for example, the lights of the first color light, the second color light, and the third color light are all green lights; or some lights with the same color, for example, the first color light and the second color light are green light, and the third color light is white light, as shown in fig. 9; the color of the light generated by the first type of sub-pixel can be reasonably set according to actual needs, and the color of the sub-pixel is not specifically limited in this embodiment.

In one embodiment, as shown in fig. 8, in the same first light emitting group, the first sub-pixel, the second sub-pixel and the third sub-pixel are arranged in a delta shape. Due to the arrangement of the delta-shaped arrangement, the layout of the luminous areas of the three first sub-pixels in the first luminous group is dispersed, the detection precision is improved, the arrangement mode is simpler, and the process preparation difficulty is reduced.

In an embodiment, in the same first light emitting group, the first sub-pixels, the second sub-pixels and the third sub-pixels are arranged in a straight line, and the arrangement mode is simpler. Specifically, as shown in fig. 1, the first light emitting group includes three first type sub-pixels, and the three first type sub-pixels are arranged in a line.

In an embodiment, as shown in fig. 6, when the first light emitting areas of two adjacent first light emitting groups are adjacent to each other, the shapes of the first type sub-pixels adjacent to each other are different, so that the arrangement pitch of the first type sub-pixels in the adjacent light emitting groups is increased, and the light emitting areas are more dispersed.

In one embodiment, one first light emitting group forms one repeating unit, or a plurality of first light emitting groups form one repeating unit, so that the setting of the repeating unit is more flexible, and the preparation difficulty of the display panel is reduced.

Specifically, as shown in fig. 10, one first light-emitting group constitutes one repeating unit, and the shapes of the first type sub-pixels in the same first light-emitting group are all different, so that the pitch of the light-emitting regions in the same light-emitting group is increased on one hand, and the pitch of the light-emitting regions in the adjacent light-emitting groups is increased when the array is formed on the other hand, so that the array arrangement is more flexible. Of course, in other embodiments, a plurality of first light emitting groups may form a repeating unit, and this embodiment is only for illustrative purposes and is not limited thereto.

In one embodiment, the plurality of first light-emitting groups form a repeating unit, and the pixel arrangement rules of the first light-emitting groups in the plurality of first light-emitting groups in the repeating unit are different. Specifically, as shown in fig. 11, one repeating unit includes two first light-emitting groups, one of the first light-emitting groups includes three first-type sub-pixels arranged in a delta, and the other of the first light-emitting groups includes four first-type sub-pixels arranged in a line, which increases the diversity of the repeating unit. Of course, in other embodiments, the number of the first light emitting groups that can be included in one repeating unit is not limited thereto, and may be three or more.

The second light emitting group includes a plurality of second-type sub-pixels.

In the present embodiment, as shown in fig. 12, the adjacent second-type sub-pixels 4 are different in shape in the same second light emission group; the second type sub-pixels with different shapes enable second light emitting areas in the same second light emitting group to be arranged in a dispersed mode, in the fingerprint detection process, the smaller shadows are formed, the shadow gathering effect caused by the opaqueness of the second light emitting areas is reduced, the fingerprint lines mapped to the optical sensing device are enabled to have the dispersed missing with smaller areas, and compared with the missing of gathering, the fingerprint identification accuracy can be improved to a certain extent.

In one embodiment, the second type sub-pixel only comprises the second light emitting area and does not comprise the transparent area; alternatively, the shape of the second type sub-pixel is the same as the shape of the first type sub-pixel.

Specifically, the second type sub-pixel only comprises the second light emitting area, so that the area of the second light emitting area can be reduced under the same display brightness, the shadow area caused by the second light emitting area is further reduced, and the fingerprint identification precision is improved.

Specifically, the shape of the second-type sub-pixel is the same as the shape of the first-type sub-pixel, and the detailed description is given to the first-type sub-pixel and will not be repeated herein.

In one embodiment, the shape of each second light emitting group includes: circular, square, oval, diamond, polygonal, dumbbell-shaped, rectangular, or triangular; the preparation process of the light-emitting group with the shape is simpler, more convenient and faster, and is easy to operate, and the controllability of the preparation process is higher. Specifically, the shape of the light emitting group may be one of the shapes listed above, the present embodiment is only illustrative, and the present invention is not limited thereto, and the shape of the light emitting group may be provided in other shapes, such as a snowflake shape, a star shape, etc., besides the above shape, and may be provided as appropriate according to actual needs.

In one embodiment, the shape of each sub-pixel of the second type comprises: circular, square, oval, diamond, polygonal, dumbbell-shaped, rectangular, or triangular; the second type sub-pixel with the shape is simpler and more convenient in preparation process, easy to operate and higher in controllability of the preparation process. Specifically, the shape of the second-type sub-pixel may be one of the shapes listed above, the embodiment is only illustrative, and the invention is not limited thereto, and the shape of the second-type sub-pixel may be provided in other shapes besides the above shapes, such as a snowflake shape, a star shape, etc., and may be reasonably provided according to actual needs.

As shown in fig. 12, the second light emitting group has a regular hexagonal shape, and the second type sub-pixels have square and circular shapes; of course, in other embodiments, the shape of the second light emitting group may also be an ellipse, a diamond, etc., and the shape of the second type sub-pixel may also be a triangle, a hexagon, etc., and the shapes of the two may be combined arbitrarily.

In one embodiment, as shown in FIG. 12, the second transparent region completely surrounds the second light emitting region; the luminous areas are surrounded by the transparent areas, so that the interval between the adjacent luminous areas in different luminous groups is larger, the shadows caused by the opaqueness of the luminous areas are more dispersed, the loss of each section of fingerprint in the fingerprint detection process is smaller, the loss can be more accurately compensated, and the fingerprint identification precision is improved. In an embodiment, as shown in fig. 12, the second light emitting area is located at the center of the light emitting group, so that the second transparent area is more uniformly distributed in the light emitting group, and the transparent areas of the adjacent light emitting groups are also relatively more uniformly distributed, thereby further reducing the aggregation degree of the light emitting areas; and simultaneously, the preparation difficulty of the second light emitting area is reduced. Of course, in other implementations, the second light emitting regions may be disposed at the edges of the light emitting groups, as shown in fig. 13.

In order to reduce the accumulation of the second light emitting areas in the same direction, the second type sub-pixels in the same second light emitting group are arranged in a staggered mode. For example, as shown in fig. 13, the same second light-emitting group includes three second-type sub-pixels, and the three second-type sub-pixels are arranged in a staggered manner to reduce the concentration of shadows as much as possible. Of course, in other embodiments, the way of the staggered arrangement can be reasonably determined according to actual situations, and this embodiment is only schematically illustrated and not limited thereto.

In one embodiment, the second type of sub-pixel in the second light emitting group includes a fourth sub-pixel, a fifth sub-pixel and a sixth sub-pixel, wherein the fourth sub-pixel is used for generating the first color light, the fifth sub-pixel is used for generating the second color light, and the sixth sub-pixel is used for generating the third color light. Specifically, for ease of understanding, as shown in fig. 13, the second light emitting group includes a fourth sub-pixel 401, a fifth sub-pixel 402, and a sixth sub-pixel 403; the fourth sub-pixel 401 is for generating a first color light, which may be red, for example, and is denoted by R in the figure; the second sub-pixel 402 is for generating a second color light, which may be green, for example, and is denoted by G in the figure; the third sub-pixel 403 is for generating a third color light, which may be blue, for example, and is denoted by B in the figure. Of course, in other embodiments, the first color light, the second color light, and the third color light may be other colors, such as white light, yellow light, magenta light, and the like. The first color light, the second color light, and the third color light may be lights with the same color, for example, the lights of the first color light, the second color light, and the third color light are all green lights; or some lights with the same color, for example, the first color light and the second color light are green light, and the third color light is white light; the color of the light generated by the second type of sub-pixel can be reasonably set according to actual needs, and the color of the sub-pixel is not specifically limited in this embodiment.

In one embodiment, the second type sub-pixels in the second light emitting group are arranged in a straight line or in a delta shape, so that the arrangement mode is simpler.

Specifically, as shown in fig. 14, the second light emitting group includes three second-type sub-pixels, which are arranged in a line. Of course, the arrangement may be a delta arrangement as shown in fig. 13, and the arrangement may be appropriately set as necessary.

In one embodiment, as shown in fig. 15, the shapes of the second-type sub-pixels adjacent to each other in the adjacent second light emitting groups are different, so that the arrangement pitch of the second-type sub-pixels in the adjacent second light emitting groups is increased, and the light emitting regions are more dispersed.

In an embodiment, as shown in fig. 14, a second light-emitting group constitutes a repeating unit, and the shapes of the second type sub-pixels in the same second light-emitting group are all different, so that the pitch of the light-emitting regions in the same second light-emitting group is increased, and the pitch of the light-emitting regions in the adjacent light-emitting groups is increased when the array is formed, so that the array arrangement is more flexible. Of course, in other embodiments, one repeating unit may also include two or even more second light-emitting groups, and the arrangement of the second type sub-pixels in the second light-emitting groups may be the same or different, and may be set as needed.

In one embodiment, the plurality of second light-emitting groups form a repeating unit, and the pixel arrangement of each of the plurality of second light-emitting groups is different. Specifically, as shown in fig. 16, one repeating unit includes two second light-emitting groups, one of which includes three second-type sub-pixels arranged in a delta, and the other of which includes three second-type sub-pixels arranged in a line, increasing the diversity of the repeating unit. Of course, in other embodiments, the number of the second light emitting groups that can be included in one repeating unit is not limited thereto, and may be three or more.

In one embodiment, the plurality of repeating units are arranged in an array in which the plurality of repeating units of the i-th row are arranged in contact; the multiple repeating units of the (i + 1) th row are arranged in contact with each other and are arranged in a staggered manner with respect to the repeating units of the (i) th row; the arrangement of the plurality of repeating units in the (i + 2) th row is the same as that of the plurality of repeating units in the (i) th row. According to the pixel array formed by the arrangement mode, the interval between the repeating units is reduced due to the staggered arrangement, the arrangement is more compact, and the fingerprint identification effect is improved on the premise of ensuring high PPI.

In one embodiment, as shown in fig. 17, the repeating unit includes a first light emitting group including three subpixels of the first type of the finished glyph; in the column direction, two adjacent columns of the repeating units are staggered by 1/2 of the height H of the repeating unit; each row of the repeating units arranged at intervals is aligned in the row direction. Of course, in other embodiments, the offset distance may also be 1/3 or 2/3 of the height of the repeating unit, and the embodiment is only for illustrative purposes and is not limited thereto.

It should be noted that the rows in this embodiment may be in a column direction, a row direction, or any direction except for rows and columns, as shown in fig. 18, and may be reasonably arranged according to actual needs. In other embodiments, the above-mentioned repeating unit, light-emitting group, and offset position may be modified correspondingly according to the description of the present embodiment, and such modifications also fall within the scope of the present embodiment.

As an alternative embodiment, as shown in fig. 19, the display panel may further include a substrate 810, a pixel circuit layer 820, and a pixel defining layer 830 that are stacked; in the pixel defining layer 830, there is an opening for accommodating a light emitting device, and a light emitting region referred to in this embodiment is disposed in the opening of the pixel defining layer. In this embodiment, an optical sensing device (e.g., a fingerprint sensor) may be disposed below the transparent region for sensing light emitted from the light-emitting region reflected by an object when the object approaches the display panel. Specifically, the light source and the light source can be arranged on one side of the substrate 810 departing from the pixel circuit layer 820, the fingerprint identification sensor can be attached below the display panel in an attaching mode, and the display panel further comprises the pixel circuit layer 820, for example, a gate and a source drain of a TFT device are usually made of metal materials to form metal wires, and a part of light can be blocked. In order to further improve the recognition accuracy of the fingerprint sensor, in this embodiment, the fingerprint sensor may include a plurality of sensing areas, the sensing areas coincide with the transparent areas, the specific sensing areas may be disposed on the pixel circuit layer 820, and light emitted from the light emitting area may directly enter the sensing areas after being reflected by an object, without penetrating through the pixel circuit layer 820, so as to reduce the transmittance reduction of light caused by light penetrating through the display panel, reduce light loss, and improve the sensitivity of the sensing areas.

As an alternative embodiment, the fingerprint recognition sensor lower electrode 831, the sensing material layer 832 and the transparent upper electrode 833. Specifically, the lower electrode is connected to a line in the pixel circuit layer 820, and converts an optical signal detected by the sensing region into an electrical signal for subsequent processing. The transparent upper electrode 833 can be made of Indium Tin Oxide (ITO) or Indium Zinc Oxide (IZO), has high light transmittance, and can effectively ensure that the reflected light reaches the sensing area through the upper electrode as much as possible, so as to increase the amount of reflected light received by the sensing area.

The fingerprint recognition sensor is used as the pixel defining layer 830, in this embodiment, specifically, the sensing material layer is used as the pixel defining layer 830, specifically, the sensing material layer covers other regions except the light emitting region, the sensing material layer located on the lower electrode forms the sensing layer for sensing reflected light in the sensing region, and the sensing material layer of other regions is used as the pixel defining layer 830 to define the size of the light emitting region, so that the pixel defining layer 830 does not need to be prepared, the process flow is saved, and the production cost is reduced. Moreover, the sensing material layer is used as the pixel defining layer 830, so that the light received by the fingerprint sensor can pass through fewer film layers, the light receiving efficiency is improved, and the fingerprint can be identified more accurately.

In this embodiment, the sensing material layer is made of an organic photoelectric material, which has a large optical path range, high brightness, high efficiency, low driving voltage, low power consumption, simple manufacturing process, and low cost. Of course, in other embodiments, the material of the sensing material layer may also be other sensing materials in the prior art, such as inorganic photoelectric materials, and may be arranged as appropriate according to the needs.

Preferably, the organic photoelectric material comprises at least one of ethoxylated Polyethyleneimine (PEIE), PC60BM, PCBTBT, poly (3, 4-ethylenedioxythiophene) -polystyrene sulfonic acid (PEDOT: PSS), which are common, mature in preparation process and low in cost. Of course, in other embodiments, any combination of the above materials may be included, and other materials besides the above materials may be reasonably determined according to needs, which is not limited in this embodiment.

The transparent upper electrode 833 is electrically connected to the first electrode 821 of the light emitting region; the lower electrode 831 is located at the same layer as the second electrode 823 in the light emitting region. Specifically, the first electrode 821 is a cathode, and the transparent upper electrode 833 is electrically connected to the first electrode 821, so that the common use of the electric potential is realized, and the number of the wirings of the display panel is reduced. The lower electrode 831 and the second electrode 823 are located on the same layer, so that the overall thickness of the display panel is reduced, the display panel is lighter and thinner, and the application range is wider.

In a preferred embodiment, as shown in fig. 19, the display panel further includes a light absorbing structure 84 disposed between the sensing region 83 and the display region 82 (light emitting region) for absorbing light emitted from the display region in a horizontal direction. The light emitted by the display area 82 faces all directions, and the light absorption structure arranged between the sensing area 83 and the display area 82 can effectively absorb the light in the horizontal direction, so that the light is blocked from entering the sensing area 83, noise is prevented from being caused, the detection accuracy of the sensing area is prevented from being interfered, and the detection precision of the sensing area is improved. Specifically, the light absorbing structure 84 is disposed adjacent to the light emitting region 82 to maximally block the horizontal direction light emitted from the display region from interfering with the sensing region.

The embodiment of the invention also provides a display screen, and the display panel in the embodiment is provided. Specifically, this display screen is transparent display screen, and the below can set up fingerprint sensor, and the display screen that adopts above-mentioned display panel to make has high transmittance, and fingerprint sensor can receive more external environment incident lights under its screen, has higher photosensitive effect.

The embodiment of the invention also provides a composite display screen, which comprises a photosensitive area and a non-photosensitive area; both the photosensitive area and the non-photosensitive area can be used for displaying static or dynamic pictures; the display screen described in the above embodiment is arranged in the first display area, the display screen arranged in the second display area is a PMOLED display screen, an AMOLED display screen, or a semi-AMOLED display screen, and a pixel circuit of the semi-AMOLED display screen includes only one transistor.

In this embodiment, the pixel circuit of the half AMOLED display screen is different from the pixel circuit of the conventional AMOLED, the pixel circuit only includes a switch transistor and does not include elements such as a storage capacitor, specifically, the pixel circuit only includes a switch transistor, the switch transistor includes a first end, a second end and a control end, the scan line is connected with the control end of the switch transistor, the data line is connected with the first end of the switch transistor, and the first electrode is connected with the second end of the switch transistor. The first electrode is an anode of the light-emitting device, the scanning line and the data line are both connected with the pixel circuit, the scanning line provides voltage for the pixel circuit to control the pixel circuit to be turned on and turned off, and when the pixel circuit is turned on, the driving current from the data line is directly provided for the first electrode to control the sub-pixel to emit light. The pixel circuit comprises a switch transistor, the switch transistor is arranged in one-to-one correspondence with the first electrode, the data line is connected with the first end of the switch transistor, the scanning line is connected with the control end of the switch transistor, and a plurality of sub-pixels, namely light emitting devices, are in one-to-one correspondence with a plurality of switch devices, namely one sub-pixel corresponds to one switch device. The data line is connected with the first end of the switch device, the scanning line is connected with the control end of the switch transistor, the number of the switch transistors in the pixel circuit is reduced to one, in the working process, only the input switch voltage is needed in the scanning line, and the load current of the OLED is not needed to be input, so that the load current of the scanning line is greatly reduced, and the scanning line can be made of transparent materials such as ITO. And the data line only needs to supply the current of one OLED pixel at each moment, and the load is also very little, therefore, the data line also can adopt transparent materials such as ITO to the luminousness of display screen has been improved.

In an alternative embodiment, when the pixel circuit includes a switching transistor, the switching transistor is a driving TFT, the first terminal is a source of the driving TFT, the second terminal is a drain of the driving TFT, and the control terminal is a gate of the driving TFT; the driving TFT is of a top gate structure or a bottom gate structure. In the actual process, the source and drain of the TFT have the same structure and may be interchanged, in this embodiment, for convenience of description, the source of the switching transistor is used as the first terminal, and the drain of the switching transistor is used as the second terminal; of course, in other embodiments, the drain of the switching transistor may be used as the first terminal and the source of the switching transistor may be used as the second terminal. In another alternative embodiment, the switch Transistor may also be a Metal-Oxide-Semiconductor Field-Effect Transistor (MOSFET), or other elements with switching characteristics in the prior art, such as an Insulated Gate Bipolar Transistor (IGBT), and so on, as long as the electronic element capable of implementing the switching function in the present embodiment and being integrated into the display screen falls within the protection scope of the present invention.

An embodiment of the present invention further provides a display device, including: the display screen or composite display screen described in the above embodiments. In this embodiment, the display device may be a product or a component having a display function, such as a mobile phone, a tablet, a television, a monitor, a palm computer, an ipod, a digital camera, and a navigator.

Fig. 20 is a schematic structural diagram of a display device body in an embodiment. In this embodiment, the display device may have a photosensitive area 50 and a non-photosensitive area 60. A light sensing device such as a fingerprint sensor 51 may be disposed in the light sensing area 50. Because the display screen in the photosensitive area can effectively improve outside light transmission to can effectively promote the sensitization effect of fingerprint sensor among the display device, and then can improve the fingerprint identification precision.

Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the invention, and such modifications and variations fall within the scope defined by the appended claims.

Claims

1. The utility model provides a display panel, its shows that inside optical sensing device that is provided with in structure below for realize the fingerprint and detect the function, its characterized in that, it includes to show the structure:

the first light-emitting groups comprise a plurality of first type sub-pixels, each first type sub-pixel comprises a first transparent region and a first light-emitting region, the first light-emitting regions of the adjacent first type sub-pixels are not adjacent, the first light-emitting regions of the adjacent first type sub-pixels in the adjacent light-emitting groups are not adjacent, and the adjacent first type sub-pixels in the same first light-emitting group have different shapes; and/or the presence of a gas in the gas,

the fingerprint detection device comprises a plurality of second light emitting groups, wherein each second light emitting group comprises a second transparent area and a second light emitting area, each second light emitting area comprises a plurality of second type sub-pixels which are closely adjacent, each second type sub-pixel does not comprise a light transmitting area, the maximum size of the graph of each second light emitting area is smaller than the preset size, and the preset size is the maximum blank space allowed when the fingerprint detection function is realized.

2. The display panel of claim 1, wherein the shape of each of the first type sub-pixels comprises: circular, square, oval, diamond, polygonal, dumbbell, rectangular, or triangular.

3. The display panel of claim 1, wherein the shape of the first light emitting region comprises: circular, square, oval, diamond, polygonal, dumbbell, rectangular, or triangular.

4. The display panel of claim 1, wherein the first transparent region is adjacent to the first light emitting region in the same first type of sub-pixel.

5. The display panel of claim 1, wherein the first transparent region completely surrounds the first light emitting region in the same first type of sub-pixel.

6. The display panel according to claim 5, wherein the first light-emitting region is located at a center position of the first-type sub-pixel in the same first-type sub-pixel.

7. The display panel according to any of claims 4 to 6, wherein the first type sub-pixels in the same first light emitting group are arranged in a staggered manner.

8. The display panel of any of claims 1-6, wherein the first type of sub-pixel comprises a first sub-pixel, a second sub-pixel, and a third sub-pixel, wherein the first sub-pixel is configured to generate a first color light, the second sub-pixel is configured to generate a second color light, and the third sub-pixel is configured to generate a third color light.

9. The display panel according to claim 8, wherein the first sub-pixel, the second sub-pixel, and the third sub-pixel are arranged in a line shape or a delta shape in the same first light emitting group.

10. The display panel according to claim 1, wherein when the first light-emitting areas of two adjacent first light-emitting groups are adjacent to each other, the shapes of the first light-emitting areas of the first type sub-pixels adjacent to each other are different.

11. The display panel according to claim 1, wherein one first light emitting group constitutes one repeating unit, or a plurality of first light emitting groups constitutes one repeating unit.

12. The display panel according to claim 11, wherein when a plurality of first light-emitting groups constitute one repeating unit, a pixel arrangement rule of each of the plurality of first light-emitting groups in one repeating unit is different.

13. The display panel according to claim 1, wherein adjacent sub-pixels of the second type have different shapes in the same second light emitting group.

14. The display panel according to claim 1, wherein the second-type sub-pixel comprises only a second light-emitting region and no transparent region, or the second-type sub-pixel has the same shape as the first-type sub-pixel.

15. The display panel according to claim 1, wherein the shape of each of the second light emitting groups comprises: circular, square, oval, diamond, polygonal, dumbbell, rectangular, or triangular.

16. The display panel of claim 1, wherein the shape of each of the second type sub-pixels comprises: circular, square, oval, diamond, polygonal, dumbbell, rectangular, or triangular.

17. The display panel according to claim 1, wherein the second transparent region completely surrounds the second light emitting region.

18. The display panel according to claim 17, wherein the second light emitting region is located in a center of the second light emitting group.

19. The display panel of claim 1, wherein the second type sub-pixels in the same second light emitting group are arranged in a staggered manner.

20. The display panel of claim 1, wherein the second type of sub-pixel in the second light emitting group comprises a fourth sub-pixel, a fifth sub-pixel and a sixth sub-pixel, wherein the fourth sub-pixel is configured to generate the first color light, the fifth sub-pixel is configured to generate the second color light, and the sixth sub-pixel is configured to generate the third color light.

21. The display panel according to claim 1 or 20, wherein the second type of sub-pixels in the second light emitting group are arranged in a straight line or in a delta shape.

22. The display panel according to claim 1 or 20, wherein the second-type sub-pixels adjacent to each other in the adjacent second light-emitting groups are different in shape.

23. The display panel of claim 1, wherein a second light-emitting group constitutes a repeating unit, and the shape of the second type of sub-pixels in the same second light-emitting group is different.

24. The display panel according to claim 11 or 23, wherein a plurality of the repeating units are arranged in an array in which a plurality of repeating units in an ith row are arranged in contact;

a plurality of repeating units of an i +1 th row are arranged in contact and are arranged in a staggered manner with respect to the repeating units of the i-th row;

the arrangement of the plurality of repeating units in the (i + 2) th row is the same as the arrangement of the plurality of repeating units in the i-th row.

25. The display panel according to claim 1, further comprising:

a substrate, a pixel circuit layer and a pixel defining layer which are arranged in a stacked manner;

a display region disposed in the opening of the pixel defining layer;

the arrangement position of the optical sensing device is any one of the following positions: a side of the substrate facing away from the pixel circuit layer, between the substrate and the pixel circuit layer, between the pixel circuit layer and the pixel defining layer, or a side of the pixel defining layer facing away from the pixel circuit layer.

26. The display panel of claim 25, wherein the optical sensing device acts as a pixel defining layer.

27. A display screen, comprising at least: a photosensitive region and a non-photosensitive region; both the photosensitive area and the non-photosensitive area can be used for displaying static or dynamic pictures;

the display panel as claimed in any one of claims 1 to 26 is disposed in the photosensitive region, and the display panel disposed in the non-photosensitive region is a PMOLED display panel or an AMOLED display panel.

28. A display device, comprising: a display screen as recited in claim 27.