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EP-3920227-B1 - DISPLAY PANEL AND DISPLAY APPARATUS

EP3920227B1EP 3920227 B1EP3920227 B1EP 3920227B1EP-3920227-B1

Inventors

  • GUO, Yuzhen
  • CHEN, XIAOCHUAN
  • WANG, LEI
  • WANG, HAISHENG
  • LIU, YINGMING
  • ZHAO, LIJUN
  • LI, Changfeng

Dates

Publication Date
20260506
Application Date
20191225

Claims (12)

  1. A display panel (01), comprising a sub-pixel array (10) including a first sub-pixel (11), a second sub-pixel (12) and a third sub-pixel (13) that are capable of emitting light of different colors; and a plurality of photosensitive units (14) disposed under a light-emitting surface of the sub-pixel array (10); each of the plurality of photosensitive units (14) including a photosensitive device (140), and the photosensitive device (140) including a photosensitive layer (1401); and an orthographic projection of the photosensitive layer (1401) in the photosensitive device (140) on a panel surface of the display panel (01) having overlapping regions with orthographic projections of the first sub-pixel (11), the second sub-pixel (12) and the third sub-pixel (13) on the panel surface of the display panel (01); wherein the photosensitive device (140) in the photosensitive unit (14) further includes: a bottom electrode (1402) and a top electrode (1403) disposed on both sides of the photosensitive layer (1401) in a direction perpendicular to the panel surface of the display panel (01); the bottom electrode (1402) is a normal Y-shaped structure or an inverted Y-shaped structure, and the top electrode (1403) is a transparent electrode; wherein the sub-pixel array (10) includes: a plurality of display groups (100) sequentially arranged in a column direction (Y-Y'); each of the plurality of display groups (100) includes: a first display sub-group (101) and a second display sub-group (102) alternately arranged in sequence in a row direction (X-X'); and each first display sub-group (101) and each second display sub-group (102) each include a first sub-pixel (11), a second sub-pixel (12) and a third sub-pixel (13) distributed in two adjacent rows; and in each display group (100), the first sub-pixel (11) and the second sub-pixel (12) in each first display sub-group (101) are located in a same row as the third sub-pixel (13) in each second display sub-group (102), and the third sub-pixel (13) in each first display sub-group (101) is located in a same row as the first sub-pixel (11) and the second sub-pixel (12) in each second display sub-group (102); wherein the plurality of photosensitive units (14) are evenly distributed under the light-emitting surface of the sub-pixel array (10); wherein each photosensitive layer (1401) includes: a first sub-photosensitive layer (S1), a second sub-photosensitive layer (S2), and a third sub-photosensitive layer (S3); a photosensitive unit (14) is disposed under a light-emitting surface of each first display sub-group (101) and a photosensitive unit (14) is disposed under a light-emitting surface of each second display sub-group (102); in a direction perpendicular to the panel surface of the display panel (01), in a photosensitive unit (14) corresponding to each first display sub-group (101), the first sub-photosensitive layer (S1) overlaps with the third sub-pixel (13) in the first display sub-group (101) and the second sub-pixel (12) in a neighbouring second display sub-group (102), the second sub-photosensitive layer (S2) overlaps with the third sub-pixel (13) in the first display sub-group (101) and the first sub-pixel (11) in another neighbouring second display sub-group (102), and the third sub-photosensitive layer (S3) overlaps with the first sub-pixel (11) and the second sub-pixel (12) in the first display sub-group (101); and in the direction perpendicular to the panel surface of the display panel (01), in a photosensitive unit (14) corresponding to each second display sub-group (102), the first sub-photosensitive layer (S1) overlaps with the third sub-pixel (13) in the second display sub-group (102) and the second sub-pixel (12) in a neighbouring first display sub-group (101), the second sub-photosensitive layer (S2) overlaps with the third sub-pixel (13) in the second display sub-group (102) and the first sub-pixel (11) in another neighbouring first display sub-group (101), and the third sub-photosensitive layer (S3) overlaps with the first sub-pixel (11) and the second sub-pixel (12) in the second display sub-group (102).
  2. The display panel (01) according to claim 1, wherein an area of an overlapping region between an orthographic projection of each photosensitive layer (1401) on the panel surface of the display panel (01) and orthographic projections of first sub-pixels (11) on the panel surface of the display panel (01) is equal; an area of an overlapping region between an orthographic projection of each photosensitive layer (1401) on the panel surface of the display panel (01) and orthographic projections of second sub-pixels (12) on the panel surface of the display panel (01) is equal; and an area of an overlapping region between an orthographic projection of each photosensitive layer (1401) on the panel surface of the display panel (01) and an orthographic projection of the third sub-pixel (13) on the panel surface of the display panel (01) is equal.
  3. The display panel (01) according to claim 1, wherein in the column direction (Y-Y'), the third sub-pixel (13) in each first display sub-group (101) and the first sub-pixel (11) and the second sub-pixel (12) in another neighbouring first display sub-group (101) constitute a first virtual sub-group (103), and the first sub-pixel (11) and the second sub-pixel (12) in each second display sub-group (102) and the third sub-pixel (13) in another neighbouring second display sub-group (102) constitute a second virtual sub-group (104); a photosensitive unit (14) is disposed under a light-emitting surface of each first virtual sub-group (103) and a photosensitive unit (14) is disposed under a light-emitting surface of each second virtual sub-group (104); in the direction perpendicular to the panel surface of the display panel (01), in a photosensitive unit (14) corresponding to each first virtual sub-group (103), the first sub-photosensitive layer (S1) overlaps with the third sub-pixel (13) in the first virtual sub-group (103) and the second sub-pixel (12) in a neighbouring second virtual sub-group (104), the second sub-photosensitive layer (S2) overlaps with the third sub-pixel (13) in the first virtual sub-group (103) and the first sub-pixel (11) in another neighbouring second virtual sub-group (104), and the third sub-photosensitive layer (S3) overlaps with the first sub-pixel (11) and the second sub-pixel (12) in the first virtual sub-group (103); in the direction perpendicular to the panel surface of the display panel (01), in a photosensitive unit (14) corresponding to each second virtual sub-group (104), the first sub-photosensitive layer (S1) overlaps with the third sub-pixel (13) in the second virtual sub-group (104) and the second sub-pixel (12) in a neighbouring first virtual sub-group (103), the second sub-photosensitive layer (S2) overlaps with the third sub-pixel (13) in the second virtual sub-group (104) and the first sub-pixel (11) in another neighbouring first virtual sub-group (103), and the third sub-photosensitive layer (S3) overlaps with the first sub-pixel (11) and the second sub-pixel (12) in the second virtual sub-group (104).
  4. The display panel (01) according to claim 3, wherein an area of an overlapping region between each first sub-photosensitive layer (S1) and a corresponding second sub-pixel (12) is equal, and an area of an overlapping region between each first sub-photosensitive layer (S1) and a corresponding third sub-pixel (13) is equal; an area of an overlapping region between each second sub-photosensitive layer (S2) and a corresponding first sub-pixel (11) is equal, and an area of an overlapping region between each second sub-photosensitive layer (S2) and a corresponding third sub-pixel (13) is equal; and an area of an overlapping region between each third sub-photosensitive layer (S3) and a corresponding first sub-pixel (11) is equal, and an area of an overlapping region between each third sub-photosensitive layer (S3) and a corresponding second sub-pixel (12) is equal.
  5. The display panel (01) according to claim 3, wherein in a column of the first display sub-groups (101), a gap between the first sub-pixel (11) and the second sub-pixel (12) is aligned with a center line of the third sub-pixel (13) in the column direction (Y-Y'); in a column of the second display sub-groups (102), a gap between the first sub-pixel (11) and the second sub-pixel (12) is aligned with a center line of the third sub-pixel (13) in the column direction (Y-Y'); and in each photosensitive unit (14), a center of the first sub-photosensitive layer (S1), a center of the second sub-photosensitive layer (S2) and a center of the third sub-photosensitive layer (S3) are connected to form a virtual triangle; wherein a distance (W) between middle points of two adjacent virtual triangles in the row direction (X-X') is equal to a distance (W) between middle points of two adjacent virtual triangles in the column direction (Y-Y'), and a middle point of each virtual triangle is a middle point of a vertical line from a vertex corner where the center of the third sub-photosensitive layer (S3) is located to an opposite side.
  6. The display panel (01) according to claim 3, wherein in the photosensitive unit (14), the first sub-photosensitive layer (S1), the second sub-photosensitive layer (S2) and the third sub-photosensitive layer (S3) included in the photosensitive layer (1401) are not connected to each other.
  7. The display panel (01) according to claim 6, wherein an orthographic projection of the bottom electrode (1402) on the panel surface of the display panel (01) covers orthographic projections of the first sub-photosensitive layer (S1), the second sub-photosensitive layer (S2) and the third sub-photosensitive layer (S3) on the panel surface of the display panel (01), and portions of the bottom electrode (1402) corresponding to the first sub-photosensitive layer (S1), the second sub-photosensitive layer (S2) and the third sub-photosensitive layer (S3) are connected to each other; and an orthographic projection of the top electrode (1403) on the panel surface of the display panel (01) covers orthographic projections of the first sub-photosensitive layer (S1), the second sub-photosensitive layer (S2) and the third sub-photosensitive layer (S3) on the panel surface of the display panel (01), and portions of the top electrode (1403) corresponding to the first sub-photosensitive layer (S1), the second sub-photosensitive layer (S2) and the third sub-photosensitive layer (S3) are connected to each other.
  8. The display panel (01) according to any one of claims 1 to 7, wherein in the direction perpendicular to the panel surface of the display panel (01), patterns of the first sub-pixel (11), the second sub-pixel (12) and the third sub-pixel (13) are all hexagons.
  9. The display panel (01) according to any one of claims 1 to 8, wherein the display panel (01) is a fingerprint recognition display panel.
  10. The display panel (01) according to any one of claims 1 to 9, wherein the first sub-pixel (11) includes a first light-emitting device (110), and a portion of the first sub-pixel (11) overlapping with the photosensitive layer (1401) is a first light-emitting layer (1101) of the first light-emitting device (110) in the first sub-pixel (11); the second sub-pixel (12) includes a second light-emitting device (120), and a portion of the second sub-pixel (12) overlapping with the photosensitive layer (1401) is a second light-emitting layer (1201) of the second light-emitting device (120) in the second sub-pixel (12); and the third sub-pixel (13) includes a third light-emitting device (130), and a portion of the third sub-pixel (13) overlapping with the photosensitive layer (1401) is a third light-emitting layer (1301) of the third light-emitting device (130) in the third sub-pixel (13).
  11. The display panel (01) according to claim 10, wherein each first sub-pixel (11), each second sub-pixel (12) and each third sub-pixel (13) each further include: a driving transistor (D) electrically connected to a corresponding light-emitting device therein; and a photosensitive unit (14) further includes a switching transistor (T) electrically connected to the photosensitive device (140) in the photosensitive unit (14); wherein a material of an active layer D(a) in the driving transistor (D) is different from a material of an active layer T(a) in the switching transistor (T), and the active layer T(a) in the switching transistor (T) is made of an oxide semiconductor material; or each first sub-pixel (11), each second sub-pixel (12) and each third sub-pixel (13) each further include: a driving transistor (D) electrically connected to a corresponding light-emitting device therein; and a photosensitive unit (14) further includes a switching transistor (T) electrically connected to the photosensitive device (140) in the photosensitive unit (14); wherein a material of an active layer D(a) in the driving transistor (D) is different from a material of an active layer T(a) in the switching transistor (T), and the active layer D(a) in the driving transistor (D) is made of a low-temperature polysilicon material.
  12. A display apparatus (02), comprising the display panel (01) according to any one of claims 1 to 11.

Description

This application claims priority to Chinese Patent Application No. 201910093793.9, filed on January 30, 2019. TECHNICAL FIELD The present disclosure relates to the field of display technologies, and in particular, to a display panel and a display apparatus. BACKGROUND In the related art, a recognition device used to collect fingerprints (i.e., a fingerprint recognition device) is usually disposed outside a display area of a display screen. For example, the fingerprint recognition device is integrated in a Home button (i.e., a start button) of a terminal such as a mobile phone, resulting in a low screen-to-body ratio (i.e., a ratio of the display area to the entire front surface of the display screen) of the display screen. In order to further increase the screen-to-body ratio of the display area, a fingerprint recognition technology integrating the fingerprint recognition device in the display area is provided. Document US2018/129852A1 discloses a display panel and an electronic device. The display panel includes: an array substrate; a plurality of organic light emitting units disposed on the array substrate; at least one fingerprint identification unit located in a display region at a side close to the array substrate of the organic light emitting units. The fingerprint identification unit performs fingerprint identification according to light rays reflected on the fingerprint identification unit by a touch body. Each organic light emitting unit includes a red organic light emitting unit, a green organic light emitting unit and a blue organic light emitting unit. In a fingerprint identification phase, the red/green organic light emitting unit emits light to be a light source for the fingerprint identification unit. Compared with the blue organic light emitting unit, the red/green organic light emitting unit has a smaller transparent area towards a side opposite to a display side. Document US2018/225500A1 discloses a display device. The display device includes a substrate including a display area that includes a first area, a plurality of pixels provided in the display area, each of the plurality of pixels provided in the display area including a first sub-pixel, a second sub-pixel and a third sub-pixel that include light emitting areas, light emitting elements disposed in the light emitting areas of the first sub-pixel, the second sub-pixel and the third sub-pixel, a touch sensor disposed on the light emitting elements to sense a touch position of a user, and a fingerprint sensor disposed in the first area to sense light emitted from the light emitting element in accordance with the touch of the user and reflected by the user. At least one of the light emitting elements is electrically connected to an adjacent emitting element that emits light of the same color. Document CN108596147A discloses a display panel and a display device and belongs to the field of display technology. The display panel comprises a display region and a non-display region, wherein the display region comprises multiple pixels, each pixel comprises at least three types of sub-pixels in different colors, and the areas of the sub-pixels are equal; the display region comprises multiple sub-display regions, and each sub-display region comprises at least one pixel; in each sub-display region, each pixel comprises at least one fingerprint pixel, each fingerprint pixel comprises at least two fingerprint sub-pixels, and fingerprint recognition units are arranged in regions where the fingerprint sub-pixels are located; and in the same fingerprint pixel, the areas of the fingerprint recognition units are not completely identical. Compared with the prior art, fingerprint recognition precision can be improved, and the color casting phenomenon of white light can be relieved. Document US2017/255809A1 discloses an electronic device. The electronic device includes a cover glass having a display surface, a pixelated photoemitting element array, and a pixelated photodetecting element array. The pixelated photoemitting element array emits a light signal through the cover glass to the display surface. The pixelated photodetecting element array is positioned relative to the pixelated photoemitting element array and the cover glass to receive a reflected light signal. The reflected light signal includes a portion of the emitted light signal reflected by total internal reflection from a refractive boundary at the display surface. Operation of each pixel is switched between the one or more photodetecting elements and the one or more photoemitting elements by the pixel selector signal component received from the pixel selector signal bus. A sensing trigger is configured to trigger the imaging scan by the pixelated photoemitting element array and the pixelated photodetecting element array, responsive to detection of an initiating action. SUMMARY In one aspect, the present disclosure provides a display panel, which is defined in independent claim 1. In another