CN111025722A - Display panel and display device - Google Patents

Display panel and display device Download PDF

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Publication number
CN111025722A
CN111025722A CN201911342572.7A CN201911342572A CN111025722A CN 111025722 A CN111025722 A CN 111025722A CN 201911342572 A CN201911342572 A CN 201911342572A CN 111025722 A CN111025722 A CN 111025722A
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CN
China
Prior art keywords
pixel
sub
display
fingerprint identification
display panel
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Granted
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CN201911342572.7A
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Chinese (zh)
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CN111025722B (en
Inventor
林仙烽
刘博智
陈国照
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Xiamen Tianma Microelectronics Co Ltd
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Xiamen Tianma Microelectronics Co Ltd
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Priority to CN201911342572.7A priority Critical patent/CN111025722B/en
Publication of CN111025722A publication Critical patent/CN111025722A/en
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Publication of CN111025722B publication Critical patent/CN111025722B/en
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    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/13338—Input devices, e.g. touch panels
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1343—Electrodes
    • G02F1/134309—Electrodes characterised by their geometrical arrangement
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
    • G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
    • G06V40/12—Fingerprints or palmprints
    • G06V40/13—Sensors therefor
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/10—OLED displays
    • H10K59/12—Active-matrix OLED [AMOLED] displays
    • H10K59/122—Pixel-defining structures or layers, e.g. banks

Abstract

The embodiment of the invention provides a display panel and a display device, wherein the display panel comprises a substrate base plate, and a display area of the substrate base plate is provided with a plurality of sub-pixels arranged in an array; each sub-pixel comprises an opening area and a non-opening area, and the opening area of the sub-pixel is provided with a display unit; the two adjacent sub-pixels are respectively a first sub-pixel and a second sub-pixel; the opening area of the first sub-pixel is provided with a first display unit, and the non-opening area of the first sub-pixel is provided with a first pixel circuit and a second pixel circuit; the opening area of the second sub-pixel is provided with a second display unit; the first display unit is electrically connected with the first pixel circuit, and the second display unit is electrically connected with the second pixel circuit; meanwhile, the display panel also comprises a plurality of fingerprint identification units; the fingerprint identification unit is arranged in the non-opening area of the second sub-pixel. The technical scheme of the embodiment of the invention can improve the aperture opening ratio of the display panel, thereby improving the display effect of the display panel.

Description

Display panel and display device
Technical Field
The invention relates to the technical field of display, in particular to a display panel and a display device.
Background
Fingerprints are a pronoun for biometric identification due to their lifelong invariance, uniqueness and convenience. Especially in the display device, functions such as unlocking and payment of the display device can be realized by performing fingerprint identification on a user.
At present, in order to realize full-screen display of a display device, a fingerprint identification unit for fingerprint identification is usually disposed in a non-opening area of a display area of the display device, and a display unit for display is disposed in the opening area of the display area, and the display unit can be reused as a light source for fingerprint identification. When fingerprint identification is carried out, light rays emitted by the light source are reflected by the finger and received by the fingerprint identification unit, so that the fingerprint identification unit can identify the valleys and ridges of the fingerprint according to the received reflected light rays.
However, when the fingerprint recognition unit is disposed in the non-opening area of the display area, the occupied area of the non-opening area is relatively increased, and the occupied area of the opening area is relatively decreased, so that the opening ratio of the display area of the display device is decreased, thereby affecting the display effect.
Disclosure of Invention
The embodiment of the invention provides a display panel and a display device, which are used for improving the aperture opening ratio of the display panel and further improving the display effect of the display device.
In a first aspect, an embodiment of the present invention provides a display panel, including: the display device comprises a substrate, a plurality of pixels and a plurality of pixel units, wherein the display area of the substrate is provided with a plurality of sub-pixels arranged in an array; each sub-pixel comprises an opening area and a non-opening area, and the opening area of the sub-pixel is provided with a display unit;
two adjacent sub-pixels are respectively a first sub-pixel and a second sub-pixel; the opening area of the first sub-pixel is provided with a first display unit, and the non-opening area of the first sub-pixel is provided with a first pixel circuit and a second pixel circuit; the opening area of the second sub-pixel is provided with a second display unit; the first display unit is electrically connected with the first pixel circuit, and the second display unit is electrically connected with the second pixel circuit;
the display panel further comprises a plurality of fingerprint identification units; the fingerprint identification unit is arranged in a non-opening area of the second sub-pixel.
In a second aspect, an embodiment of the present invention provides a display device, including the display panel described above.
The embodiment of the invention provides a display panel and a display device, wherein a display area of a substrate base plate in the display panel is provided with a plurality of sub-pixels which are arranged in an array, each sub-pixel comprises an opening area and a non-opening area, and the opening area of each sub-pixel is provided with a display unit; the two adjacent sub-pixels are respectively used as a first sub-pixel and a second sub-pixel, the opening area of the first sub-pixel is provided with a first display unit, and the opening area of the second sub-pixel is provided with a second display unit; the first pixel circuit and the second pixel circuit are arranged in the non-opening area of the first sub-pixel, the first display unit is electrically connected with the first pixel circuit, the second display unit is electrically connected with the second pixel circuit, and the fingerprint identification unit is arranged in the non-opening area of the second sub-pixel. Therefore, compared with the situation that the non-opening area of one sub-pixel is provided with both the fingerprint identification element and the pixel circuit in the prior art, the embodiment of the invention concentrates the pixel circuit electrically connected with the display units of the opening areas of two adjacent sub-pixels in the non-opening area of one sub-pixel, and arranges the fingerprint identification unit in the non-opening area of the other sub-pixel, thereby being beneficial to improving the opening rate of the display panel, improving the display brightness of the display panel and improving the display effect of the display panel. Meanwhile, when two pixel circuits are concentrated in the non-opening area of one sub-pixel, the area of the light-transmitting area of the display panel is favorably increased, so that the incident quantity and the emergent quantity of light are increased, and the accuracy and the sensitivity of fingerprint identification can be improved when fingerprint identification is carried out.
Drawings
FIG. 1 is a schematic top view of a display panel in the prior art
Fig. 2 is a schematic top view of a display panel according to an embodiment of the present invention;
fig. 3 is a partially enlarged view of the Q region of fig. 2.
Fig. 4 is a schematic top view of another display panel according to an embodiment of the present invention;
FIG. 5 is a schematic top view of another display panel according to an embodiment of the present invention;
fig. 6 is a schematic top view of another display panel according to an embodiment of the present invention;
fig. 7 is a schematic top view of another display panel according to an embodiment of the present invention;
FIG. 8 is a schematic top view of a display panel according to an embodiment of the present invention;
fig. 9 is a schematic diagram of a film structure of a display panel according to an embodiment of the invention;
FIG. 10 is a schematic diagram of a film structure of another display panel according to an embodiment of the present invention;
FIG. 11 is a schematic diagram of a film structure of another display panel according to an embodiment of the present invention;
FIG. 12 is a diagram illustrating a film structure of another display panel according to an embodiment of the present invention;
fig. 13 is a schematic structural diagram of a display device according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
Fig. 1 is a schematic top view of a display panel in the prior art. As shown in fig. 1, a display unit for displaying is disposed in an opening area of each of pixels P1 and P2 in a display panel having a fingerprint recognition function; meanwhile, a fingerprint recognition unit FPR and a pixel circuit Dr are disposed at a non-opening area of each pixel P1 in the fingerprint recognition area a of the display panel; and only the pixel circuit Dr is disposed at the non-opening area of each pixel P2 in the non-fingerprint recognition area B of the display panel. The fingerprint identification unit can receive light reflected by valleys and ridges of a finger to generate a fingerprint identification signal according to the received reflected light so as to realize a fingerprint identification function; and the pixel circuit Dr can drive the display unit to display.
At this time, the size of the non-open area of one pixel P1 in the fingerprint identification area a in the X direction at least includes the sum of the sizes of the data line D1, the FPR signal reading line D2 and the pixel circuit Dr, and the size of the non-open area in the Y direction at least includes the sum of the size a21 of the pixel circuit Dr and its scanning line S1 and the size a22 of the fingerprint identification unit FPR and its scanning line S2, that is, the size of the non-open area of the pixel P1 is a2 × b 2; the size of the non-opening area of the pixel P2 is a21 × B4, and the non-opening area of the pixel P2 in the non-fingerprint identification area B does not need to be provided with the FPR signal readout line, the fingerprint identification unit and the scanning line thereof. Under the premise that the resolution of the fingerprint identification area A is the same as that of the non-fingerprint identification area B, the area occupied by the non-opening area of the pixel P1 in the fingerprint identification area A is larger than that occupied by the non-opening area of the pixel P2 in the non-fingerprint identification area B, so that the area of the opening area of the pixel P1 is smaller than that of the opening area of the pixel P2, and the opening rate of the fingerprint identification area A is smaller than that of the non-fingerprint identification area B. Therefore, when the display panel displays a picture, the display brightness of the fingerprint identification area A is different from that of the non-fingerprint identification area B, so that the display of the display panel is uneven, and the display effect of the display panel is influenced. Meanwhile, when the full screen of the display panel has the fingerprint identification function, the whole aperture opening ratio of the display panel is reduced, so that the display brightness of the display panel is low, and the display effect of the display panel is also influenced.
To solve the above technical problem, an embodiment of the present invention provides a display panel, including: the display device comprises a substrate, a plurality of pixels and a plurality of pixel units, wherein the display area of the substrate is provided with a plurality of sub-pixels arranged in an array; each sub-pixel comprises an opening area and a non-opening area, and the opening area of the sub-pixel is provided with a display unit; two adjacent sub-pixels are respectively a first sub-pixel and a second sub-pixel; the opening area of the first sub-pixel is provided with a first display unit, and the non-opening area of the first sub-pixel is provided with a first pixel circuit and a second pixel circuit; the opening area of the second sub-pixel is provided with a second display unit; the first display unit is electrically connected with the first pixel circuit, and the second display unit is electrically connected with the second pixel circuit; the display panel further comprises a plurality of fingerprint identification units; the fingerprint identification unit is arranged in the non-opening area of the second sub-pixel.
By adopting the technical scheme, the first pixel circuit electrically connected with the first display unit in the first sub-pixel and the second pixel circuit electrically connected with the second display unit in the second sub-pixel are arranged in the non-opening area of the first sub-pixel, and the fingerprint identification unit is arranged in the non-opening area of the second sub-pixel, so that the pixel circuits of two adjacent sub-pixels are intensively arranged in the non-opening area of the first sub-pixel, the fingerprint identification unit can be arranged in the non-opening area of the second sub-pixel, at the moment, the non-opening area of the second sub-pixel does not need to be provided with the pixel circuit, the occupied area of the non-opening area is favorably reduced, the aperture opening ratio of the display panel is favorably improved, the display brightness of the display panel is improved, and the display effect of the display panel is improved. Meanwhile, when the aperture opening ratio of the display panel is increased, the area of the light-transmitting area of the display panel is correspondingly increased, so that the incident quantity and the emergent quantity of light are increased, and the accuracy and the sensitivity of fingerprint identification can be improved when fingerprint identification is carried out. In addition, to fingerprint identification district and the display panel that non-fingerprint identification district all can carry out the demonstration, can make the pixel circuit of two adjacent pixels set up in the non-opening district of first sub-pixel in the fingerprint identification district, the fingerprint identification unit sets up in the non-opening district of second sub-pixel, be favorable to improving the aperture opening ratio in fingerprint identification district, thereby improve the display brightness in fingerprint identification district, and then the display brightness in fingerprint identification district and non-fingerprint identification district tends to unanimous during time, be favorable to improving display panel's demonstration homogeneity, display panel's display effect can be improved equally.
In the embodiment of the present invention, the display panel may be a display panel capable of performing fingerprint identification and displaying a picture on a full screen, or may also be a display panel including a fingerprint identification area and a non-fingerprint identification area, and the fingerprint identification area and the non-fingerprint identification area are capable of displaying a picture. For convenience of description, the embodiment of the present invention exemplarily illustrates the technical solution of the embodiment of the present invention by taking the display panel capable of performing fingerprint identification for a full screen as an example.
The above is the core idea of the present invention, and based on the embodiments of the present invention, a person skilled in the art can obtain all other embodiments without creative efforts, which belong to the protection scope of the present invention. The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.
Fig. 2 is a schematic top view of a display panel according to an embodiment of the present invention. As shown in fig. 2, the display panel 100 includes a display area 110 and a non-display area 120, the display area 110 is used for displaying a picture, and the non-display area 120 is provided with corresponding circuit traces; the display panel 100 further includes a substrate base plate 70; the position of the substrate 70 corresponding to the display area 110 of the display panel 100 is the display area of the substrate 70, and the position of the substrate 70 corresponding to the non-display area 120 of the display panel 100 is the non-display area of the substrate 70.
A plurality of sub-pixels 10 arranged in an array are arranged in a display area 110 of the substrate 70, each sub-pixel 10 comprises an opening area and a non-opening area, and a display unit for displaying is arranged in the opening area of each sub-pixel 10; two adjacent sub-pixels 10 are respectively a first sub-pixel 11 and a second sub-pixel 12; a first display unit 111 is provided in an opening area of the first sub-pixel 11, and a first pixel circuit 112 and a second pixel circuit 122 are provided in a non-opening area of the first sub-pixel 11; the second display unit 121 is disposed in the opening area of the second sub-pixel 12, the first display unit 111 is electrically connected to the first pixel circuit 112, the second display unit 121 is electrically connected to the second pixel circuit 112, the first pixel circuit can control the first display unit to display, and the second pixel circuit can control the second display unit to display.
In addition, the display panel 100 further includes a plurality of fingerprint recognition units 20; the fingerprint identification unit 20 is disposed in the non-opening area of the second sub-pixel 12, and the fingerprint identification unit 20 can receive the light reflected by the finger and convert the received reflected light into a fingerprint identification signal to perform fingerprint identification, so that the display panel 100 can implement a fingerprint identification function.
Specifically, the opening area of each pixel 10 is a transparent area in the display area 110 of the display panel 100, and the non-opening area of each pixel 10 is a non-transparent area in the display area 110 of the display panel 100. Two adjacent pixels 10 in the display area 110 of the display panel 100 are a first sub-pixel 11 and a second sub-pixel 12, respectively, and the fingerprint identification unit 20 is disposed in the non-opening area of the second sub-pixel 12 by disposing a first pixel circuit 112 for controlling the opening area of the first sub-pixel 11 to display by a first display unit 111 and a second pixel circuit 122 for controlling the opening area of the second sub-pixel 12 to display by a second display unit 121 in the non-opening area of the first sub-pixel 11. In this way, the first pixel circuit 112 and the second pixel circuit 122 are both intensively arranged in the non-open area of the first sub-pixel 11, so that the non-open area of the second sub-pixel 12 does not need to be provided with a pixel circuit, the fingerprint identification unit 20 can be arranged in the original non-open area of the second sub-pixel 12 for arranging a pixel circuit, and the non-open area is not needed to be additionally increased for arranging the fingerprint identification unit 20, so that on the premise that the display panel 100 can realize the fingerprint identification function, the occupied area of the non-open area in the display area 110 of the display panel 100 is reduced, thereby being beneficial to improving the aperture opening ratio of the display panel 100, improving the display brightness of the display panel 100, and further improving the display effect of the display panel 100.
Meanwhile, when the aperture opening ratio of the display panel 100 is increased, the area of the light-transmitting area of the display panel 100 is correspondingly increased, so that the quantity of emergent light and incident light of the display panel 100 can be increased, reflected light received by the fingerprint identification unit 20 can be increased when fingerprint identification is performed, and the accuracy and sensitivity of fingerprint identification are improved.
It should be noted that, in fig. 2, only one transistor represents one pixel circuit, and a solid line represents a connection relationship of the pixel circuit, in an embodiment of the present invention, one pixel circuit may include one transistor, or on the premise that an aperture ratio of a display panel can be improved, one pixel circuit may also include a plurality of transistors, a plurality of capacitors, other devices, and the like, which is not specifically limited in the embodiment of the present invention; and the structures can be electrically connected through wiring and punching of different film layers.
Illustratively, fig. 3 is a partially enlarged view of an exemplary structure of the Q region of fig. 2. Referring to fig. 2 and 3, when the display panel 100 is a liquid crystal display panel, the display unit of each sub-pixel at least includes a pixel electrode. The first pixel circuit 112 and the second pixel circuit 122 disposed in the first sub-pixel 11 may respectively include a thin film transistor, the thin film transistor of the first pixel circuit 112 may be directly electrically connected to the pixel electrode of the first display unit 111 through a via hole, and the thin film transistor of the second pixel circuit 122 may be connected to a trace on the same layer as the pixel electrode through a via hole, and then electrically connected to the pixel electrode of the second display unit 121 through the trace.
It should be noted that, the display color of the first display unit 111 disposed in the opening area of the first sub-pixel 11 may be the same as or different from the display color of the second display unit 121 disposed in the opening area of the second sub-pixel 12, which is not specifically limited in the embodiment of the present invention. Meanwhile, in the embodiment of the present invention, the adjacent first sub-pixel and the adjacent second sub-pixel may be two adjacent sub-pixels in the same row, or two adjacent sub-pixels in the same column.
Optionally, with continued reference to fig. 2, the adjacent first sub-pixel 11 and second sub-pixel 21 are two adjacent sub-pixels 10 in the same row. At this time, the first pixel circuit 112 and the second pixel circuit 122 located in the non-opening area of the same first sub-pixel 11 are arranged in order in the row direction X, and the width W1 of the first sub-pixel 11 is larger than the width W2 of the second sub-pixel 12 in the row direction X.
Specifically, when the adjacent first sub-pixel 11 and the adjacent second sub-pixel 12 are two adjacent sub-pixels in the same row, the first pixel circuit 112 and the second pixel circuit 122 located in the non-opening area of the same first sub-pixel 11 are arranged along the row direction X, so that the second pixel circuit 122 can be disposed on the side of the first pixel circuit 112 close to the second sub-pixel 12, which is beneficial to the electrical connection between the second pixel circuit 122 and the second display unit 121, and the second pixel circuit 122 can control the second display unit 121 to display. Meanwhile, when the first pixel circuit 112 and the second pixel circuit 122 located in the non-opening area of the same first sub-pixel 11 are arranged in the row direction X, providing two pixel circuits in the non-opening area of the first sub-pixel 11 increases the width of the non-opening area of the first sub-pixel 11 in the row direction X, but decreases the length of the non-opening area of the first sub-pixel 11 in the column direction Y, and at this time, by making the width W1 of the first display unit 111 provided in the opening area of the first sub-pixel 11 larger than the width W2 of the second display unit 121 provided in the opening area of the second sub-pixel 12, the width of the opening area of the first sub-pixel 11 and the width of the non-opening area of the first sub-pixel 11 are increased at the same time, the area of the opening area in the first sub-pixel 11 can be increased; meanwhile, since only the fingerprint identification unit 20 is disposed in the non-opening area of the second sub-pixel 12, and no pixel circuit is disposed, the non-opening area originally used for disposing the pixel circuit can be increased to be an opening area, so that the length of the non-opening area of the second sub-pixel 12 in the column direction Y can be reduced, the width of the second sub-pixel 12 in the row direction X cannot be increased, the size of the non-opening area of the second sub-pixel 12 is reduced, and the area of the opening area in the second sub-pixel 12 can be correspondingly increased. So, the opening area of first subpixel 11 and second subpixel 12 increases simultaneously, and the size of the non-opening area of first subpixel 11 and second subpixel 12 reduces simultaneously to can improve display panel 100's aperture ratio, be favorable to improving display panel's light-transmitting zone area, and then improve display panel's display effect, and can improve fingerprint identification's precision and sensitivity.
Optionally, with reference to fig. 2, a plurality of scan lines 31 extending along a row direction X and arranged along a column direction Y, and a plurality of data lines 41 extending along the column direction Y and arranged along the row direction X are further disposed in the display area 110 of the display panel 100, and the row direction X intersects with the column direction Y. In this manner, the intersection of the scan line 31 and the data line 41 can define the position of each sub-pixel 10. Wherein, the sub-pixels 10 in the same row share the scan line 31; the sub-pixels 10 in the same column share the data line 41, and the first pixel circuit 112 and the second pixel circuit 122 in the non-opening area of the same first sub-pixel 11 are electrically connected to two adjacent data lines 41, respectively.
Specifically, when the adjacent first sub-pixel 11 and second sub-pixel 12 are located in the same row, the first sub-pixel 11 and second sub-pixel 12 are respectively located in different columns, the first pixel circuit 112 and second pixel circuit 122 located in the non-opening area of the first sub-pixel 11 are electrically connected to the same scan line 31, and the first pixel circuit 112 and the second pixel circuit 122 are electrically connected to different data lines 41 respectively, so that the scan signal transmitted by the scan line 31 can be simultaneously transmitted to the control terminals of the first pixel circuit 112 and the second pixel circuit 122 in the same row, and the data signals provided by the display driving chip 50 to the pixels 10 can be transmitted to the first pixel circuit 112 and the second pixel circuit 122 through the different data lines 41, the first pixel circuit 112 is enabled to control the first display unit 111 to perform display, and the second pixel circuit 122 is enabled to control the second display unit 121 to perform display. In this way, even if the first pixel circuit 112 for controlling the first display unit 111 for displaying in the aperture area of the first sub-pixel 11 and the second pixel circuit 122 for controlling the second display unit 121 for displaying in the aperture area of the second sub-pixel 12 are both provided in the non-aperture area of the first sub-pixel 11, the display unit of each sub-pixel 10 can be driven line by line for displaying.
Optionally, fig. 4 is a schematic top view structure diagram of another display panel provided in the embodiment of the present invention. As shown in fig. 4, the adjacent first sub-pixel 11 and the adjacent second sub-pixel 12 are two adjacent sub-pixels 10 in the same column. At this time, the first pixel circuit 112 and the second pixel circuit 122 located in the non-opening region of the same first sub-pixel 11 are sequentially arranged in the column direction Y, and the length L1 of the first sub-pixel 11 is greater than the length L2 of the second sub-pixel 12 in the column direction Y.
Specifically, when the adjacent first sub-pixel 11 and the adjacent second sub-pixel 12 are two adjacent sub-pixels in the same column, the first pixel circuit 112 and the second pixel circuit 122 located in the non-opening area of the same first sub-pixel 11 are arranged along the column direction Y, so that the second pixel circuit 122 can be disposed on the side of the first pixel circuit 112 close to the second sub-pixel 12, which is beneficial to the electrical connection between the second pixel circuit 122 and the second display unit 121, and the second pixel circuit 122 can control the second display unit 121 to display. Meanwhile, when the first pixel circuit 112 and the second pixel circuit 122 located in the non-opening area of the same first sub-pixel 11 are arranged along the column direction, two pixel circuits are arranged in the non-opening area of the first sub-pixel 11, which increases the length of the non-opening area of the first sub-pixel 11 in the column direction Y, but does not increase the width of the non-opening area of the first sub-pixel 11 in the row direction X, and at this time, the length L1 of the first display unit 111 arranged in the opening area of the first sub-pixel 11 is made larger than the length L2 of the second display unit 121 arranged in the opening area of the second sub-pixel 12, so that the length of the opening area of the first sub-pixel 11 and the length of the non-opening area of the first sub-pixel 11 are increased at the same time, which is beneficial to increase the size of the opening area of the first sub-pixel 11; meanwhile, since only the fingerprint identification unit 20 is disposed in the non-opening area of the second sub-pixel 12, and no pixel circuit is disposed, the non-opening area originally used for disposing the pixel circuit can be increased to be an opening area, so that the length of the non-opening area of the second sub-pixel 12 in the column direction Y can be reduced, the width of the second sub-pixel 12 in the row direction X cannot be increased, the size of the non-opening area of the second sub-pixel 12 can be reduced, and the area of the opening area in the second sub-pixel 12 can be correspondingly increased. So, the opening area of first subpixel 11 and second subpixel 12 increases simultaneously, and the size of the non-opening area of first subpixel 11 and second subpixel 12 reduces simultaneously to can improve display panel 100's aperture ratio, be favorable to improving display panel's light-transmitting zone area, and then improve display panel's display effect, and can improve fingerprint identification's precision and sensitivity.
Optionally, with continued reference to fig. 4, a plurality of data lines 41 extending in the column direction Y and arranged in the row direction X are further disposed in the display area 110 of the display panel 100; and a plurality of scan line groups 310 extending along the row direction X and arranged along the column direction Y, each scan line group 310 including a first scan line 311 and a second scan line 312; and the row direction intersects the column direction; thus, the intersection of the scan line group 310 and the data line 41 defines the location of each sub-pixel 10. Wherein, the sub-pixels 10 in the same row share the scan line group 310; the sub-pixels 10 in the same column share the data line 41, and the first pixel circuit 112 and the second pixel circuit 122 in the non-opening area of the same first sub-pixel 11 are electrically connected to the first scan line 311 and the second scan line 312 of the same scan line group 310, respectively; and the fingerprint recognition unit 20 is located on a side of the second display unit 121 facing away from the first display unit 111.
Specifically, with continued reference to fig. 4, when the adjacent first sub-pixel 11 and the second sub-pixel 12 are located in the same column, the first sub-pixel 11 and the second sub-pixel 12 are respectively located in different rows, the first pixel circuit 112 and the second pixel circuit 122 located in the non-opening area of the same first sub-pixel 11 are respectively electrically connected to the first scan line 311 and the second scan line 312 of the same scan line group 310, and the first pixel circuit 112 and the second pixel circuit 122 located in the non-opening area of the same first pixel 11 can be electrically connected to the same data line; at this time, the first scanning signal transmitted by the first scanning line 311 can be transmitted to the first pixel circuit 112, so that the first pixel circuit 112 controls the first display unit 111 in the opening area of the first pixel 11 to display; the second scanning signal transmitted by the second scanning line 312 can be transmitted to the second pixel circuit 122, so that the second pixel circuit 122 controls the second display unit 121 in the opening area of the second pixel 12 to display, and thus, even if the first pixel circuit 112 for controlling the first display unit 111 in the opening area of the first sub-pixel 11 to display and the second pixel circuit 122 for controlling the second display unit 121 in the opening area of the second sub-pixel 12 to display are both disposed in the non-opening area of the first sub-pixel 11, the display units of the sub-pixels 10 can be driven row by row to display.
Meanwhile, since the second pixel circuit 122 in the non-opening area of the first sub-pixel 11 needs to be electrically connected to the second display unit 121 in the opening area of the second sub-pixel 12, the fingerprint identification unit 20 is disposed on the side of the second display unit 121 away from the first display unit 122, which can prevent the influence on the electrical connection between the second pixel circuit 122 and the second display unit 121 due to the arrangement of the fingerprint identification unit 20 in the second sub-pixel 12, thereby facilitating the arrangement of the connection trace electrically connecting the second pixel circuit 122 and the second display unit 121. In this way, the first pixel circuit 112 and the second pixel circuit 122 are disposed in the non-opening area of the first sub-pixel 11, and the fingerprint identification unit 20 is disposed in the non-opening area of the second sub-pixel 12, which is beneficial to reducing the size of the non-opening area of the first sub-pixel 11 and the second sub-pixel 12, so as to relatively increase the size of the opening area of the first sub-pixel 11 and the second sub-pixel 12, improve the aperture ratio of the display panel 100, and is beneficial to increasing the area of the light-transmitting area of the display panel, thereby improving the display effect of the display panel, and improving the accuracy and sensitivity of fingerprint identification.
It should be noted that fig. 4 is a diagram illustrating an embodiment of the present invention, and in fig. 4, the first pixel circuit and the second pixel circuit located in the same non-opening area of the first sub-pixel are arranged along the column direction, and the first scan line and the second scan line located in the same scan line group are located on the same side of the first sub-pixel; in addition, the first scan line and the second scan line in the same scan line group may be respectively located at two opposite sides of the first sub-pixel.
For example, fig. 5 is a schematic top view structure diagram of another display panel provided in the embodiment of the present invention. The same in fig. 5 as in fig. 4 can be referred to the above description of fig. 4, and only the differences in fig. 5 from fig. 4 will be described below. As shown in fig. 5, the first scanning line 311 and the second scanning line 312 in the same scanning line group 310 are located at two opposite sides of the first sub-pixel 11, and the first pixel circuit 112 and the second pixel circuit 122 are located at two opposite sides of the first display unit 111. Like this, can be with the length increase of first display element 111 on being listed as direction Y equally to be favorable to improving display panel's aperture opening ratio, and then improve display panel's display effect, be favorable to improving fingerprint identification precision and sensitivity simultaneously.
Optionally, in the embodiment of the present invention, the adjacent first sub-pixel and the adjacent second sub-pixel may be two adjacent sub-pixels in the same row, or two adjacent sub-pixels in the same column. When the adjacent first sub-pixel and the adjacent second sub-pixel are two adjacent sub-pixels in the same row, each first sub-pixel and each second sub-pixel in the display panel can be sequentially arranged at intervals along the row direction; when the adjacent first sub-pixel and the adjacent second sub-pixel are two adjacent sub-pixels in the same column, each first sub-pixel and each second sub-pixel in the display panel may be sequentially arranged at intervals along the column direction.
Illustratively, with continued reference to fig. 4, when the adjacent first sub-pixel 11 and second sub-pixel 12 are two adjacent sub-pixels of the same column, the first sub-pixel 11 and second sub-pixel 12 are alternately arranged along the column direction Y. At this time, the display colors of the first display units 111 located at the opening areas of the first sub-pixels 11 in the same column and the second display units 121 located at the opening areas of the second sub-pixels 12 may be the same or different, the display colors of the first display units 111 located at the opening areas of the first sub-pixels 11 in the same row may be the same or different, and the display colors of the second display units 121 located at the opening areas of the second sub-pixels 11 in the same row may be the same or different. For example, the display color of the first display unit 111 disposed at the opening area of the first sub-pixel 11 located in the same column is the same as the display color of the second display unit 121 disposed at the opening area of the second sub-pixel 12; and the display colors of the first display units 111 disposed at the opening areas of the plurality of first sub-pixels 11 located in the same row may include red, green, blue, and the like; accordingly, the display colors of the second display units 121 disposed at the opening areas of the second sub-pixels 12 in the same row may also include red, green, blue, and the like. In this manner, by disposing the first sub-pixel 11 and the second sub-pixel 12 at intervals in the column direction Y in this order, the length of the non-opening area in the first sub-pixel 11 in the column direction Y can be increased by disposing the first pixel circuit 112 and the second pixel circuit 122 disposed in the non-opening area in the first sub-pixel 11 in this order, and by increasing the length of the opening area in the first sub-pixel 11 with the increase in the length of the non-opening area in the first sub-pixel 11, it is advantageous to increase the size of the opening area in the first sub-pixel 11; meanwhile, the second sub-pixel 12 does not need to be additionally provided with a pixel circuit, and the fingerprint identification unit 20 can be arranged in the second sub-pixel 12 to be used for arranging a non-opening area of the pixel circuit, so that the size of the non-opening area in the second sub-pixel 12 is reduced, the size of the opening area in the second sub-pixel 12 can be relatively increased, the aperture opening ratio of the display panel 100 can be improved, the area of a light transmission area of the display panel is favorably improved, the display effect of the display panel is further improved, and the accuracy and the sensitivity of fingerprint identification can be improved.
For example, fig. 6 is a schematic top view structure diagram of another display panel provided in the embodiment of the present invention. As shown in fig. 6, when the adjacent first sub-pixel 11 and second sub-pixel 12 are two adjacent sub-pixels in the same row, the first sub-pixel 11 and second sub-pixel 12 are alternately arranged in the row direction X. At this time, the display color of the first display unit 111 disposed in the opening area of the first sub-pixel 11 may be different from the display color of the second display unit 121 disposed in the opening area of the second sub-pixel 12, the display color of the first display unit 111 disposed in the opening area of each first sub-pixel 11 located in the same column may be the same, and the display color of the second display unit 121 disposed in the opening area of each second sub-pixel 12 located in the same column may be the same. For example, the display color of the first display unit 111 disposed at the opening area of the first sub-pixel 11 may be blue or red, and the display color of the second display unit 121 disposed at the opening area of the second sub-pixel 12 may be green. Alternatively, the display color of the first display unit 111 disposed at the opening area of the first sub-pixel 11 may be blue or green, and the display color of the second display unit 121 disposed at the opening area of the second sub-pixel 12 may be red. In this manner, by disposing the first sub-pixel 11 and the second sub-pixel 12 at intervals in the row direction X in this order, the length of the non-open area in the first sub-pixel 11 can be reduced in the column direction Y and the length of the open area in the first sub-pixel 11 can be increased accordingly by disposing the first pixel circuit 112 and the second pixel circuit 122 disposed in the non-open area in the first sub-pixel 11 in this order in the row direction X, and the width of the open area in the first sub-pixel 11 can be increased with the increase of the non-open area in the first sub-pixel 11 in the row direction X, so that the size of the non-open area in the first sub-pixel 11 is reduced as a whole and the size of the open area in the first sub-pixel 11 is increased as a whole; meanwhile, the second sub-pixel 12 does not need to be additionally provided with a pixel circuit, and the fingerprint identification unit 20 can be arranged in the second sub-pixel 12 to be used for arranging a non-opening area of the pixel circuit, so that the size of the non-opening area in the second sub-pixel 12 is reduced, the size of the opening area in the second sub-pixel 12 can be relatively increased, the aperture opening ratio of the display panel 100 can be improved, the area of a light transmission area of the display panel is favorably improved, the display effect of the display panel is further improved, and the accuracy and the sensitivity of fingerprint identification can be improved.
It should be noted that, on the premise that the core invention point of the embodiment of the present invention can be realized, the embodiment of the present invention does not specifically limit the display color of each sub-pixel and the arrangement manner of the display units with different display colors.
Optionally, a third sub-pixel may be further disposed in the display area of the substrate in the display panel, and the third sub-pixel may be adjacent to the first sub-pixel, or the third sub-pixel may be adjacent to the second sub-pixel. The opening area of the third sub-pixel is provided with a third display unit, the non-opening area of the third sub-pixel is provided with a third pixel circuit, and the third pixel circuit is electrically connected with the third display unit so as to control the third display unit to display. The display colors of the first display unit, the second display unit and the third display unit are different from each other.
For example, fig. 7 is a schematic top view structure diagram of another display panel provided in the embodiment of the present invention. As shown in fig. 7, when the adjacent first sub-pixel 11 and second sub-pixel 12 are located in the same row, the third sub-pixel 13 adjacent to the first sub-pixel 11 or the second sub-pixel 12 is also located in the same row as the first sub-pixel 11 and the second sub-pixel 12. Since the non-open area of the first sub-pixel 11 is provided with the first pixel circuit 112 and the second pixel circuit 122, while the non-open area of the second sub-pixel 12 is provided with only the fingerprint recognition unit 20, and the non-open area of the third sub-pixel 13 is provided with only the third pixel circuit, the width of the first sub-pixel 11 in the row direction X may be greater than both the width of the second sub-pixel 12 and the width of the third sub-pixel 13 in the row direction X. At this time, it is also advantageous to improve the aperture ratio of the display panel 100, thereby improving the display effect of the display panel, and improving the fingerprint recognition accuracy and sensitivity.
The display colors of the first display unit 111 disposed in the opening area of the first sub-pixel 11, the second display unit 121 disposed in the opening area of the second sub-pixel 12, and the third display unit 131 disposed in the opening area of the third sub-pixel 13 are different from each other. When the display panel includes display units with display colors of red, green and blue, because human eyes have low recognition degree of blue, the display color of the first display unit 111 disposed in the opening area of the first sub-pixel 11 can be blue, and the display color of the second display unit 121 disposed in the opening area of the second sub-pixel 12 and the display color of the third display unit 131 disposed in the opening area of the third sub-pixel can be one of red and green, respectively, that is, when the display color of the second display unit 121 is red, the display color of the third display unit 131 can be green; and when the display color of the second display unit 121 is green, the display color of the third display unit 131 may be red. In this way, the size of the display unit with the display color of blue is larger than that of the display unit with the display color of red or green, and the area of the light-transmitting area of the light with the light-emitting color of blue can be relatively increased, so that the light-emitting brightness of each display unit tends to be consistent, the display uniformity of the display panel is improved, and the display effect of the display panel is further improved.
For example, fig. 8 is a schematic top view structure diagram of another display panel provided in the embodiment of the present invention. The same points in fig. 8 as in fig. 7 can be referred to the above description of fig. 7, and are not repeated herein, and only the differences between fig. 8 and fig. 7 will be described here. As shown in fig. 8, when the adjacent first sub-pixel 11 and second sub-pixel 12 are two adjacent sub-pixels in the same column, the third sub-pixel 13 adjacent to the first sub-pixel 11 or the second sub-pixel 12 is also located in the same column as the first sub-pixel 11 and the second sub-pixel 13. At this time, in the column direction Y, the length of the first display unit 111 disposed at the aperture area of the first sub-pixel 11 is greater than the length of the second display unit 121 disposed at the aperture area of the second sub-pixel 12 and the length of the third display unit 131 disposed at the aperture area of the third sub-pixel 13. In this way, it is also beneficial to improve the aperture opening ratio of the display panel 100, thereby improving the display effect of the display panel, and improving the fingerprint identification precision and sensitivity.
Optionally, the display area of the display panel is further provided with a plurality of signal reading lines arranged along the row direction and extending along the column direction; the fingerprint identification units in the same row share a signal reading line, and the signal reading line and the data line are arranged on the same layer.
Fig. 9 is a schematic diagram illustrating a film structure of a display panel according to an embodiment of the present invention. As shown in fig. 2 and fig. 9, the display area 110 of the display panel 100 is further provided with a plurality of signal reading lines 42 arranged along the row direction X and extending along the column direction Y, and the fingerprint identification units 20 in the same column share one signal reading line 42. The signal reading line 42 can transmit the fingerprint identification signal output from the fingerprint identification unit 20 to the fingerprint identification driving chip 60 to enable fingerprint identification. The signal readout line 42 for transmitting the fingerprint identification signal outputted from the fingerprint identification unit 20 is disposed on the same layer as the data line 41 for transmitting the data signal to each sub-pixel 10. Thus, the signal readout line 42 and the data line 41 can be formed by the same material in the same process, which is favorable for simplifying the process and reducing the production cost, and the display panel 100 does not need to be additionally provided with a film layer of the signal readout line 42, which is favorable for thinning the display panel.
Optionally, the display area of the display panel is further provided with a plurality of signal reading lines arranged along the row direction and extending along the column direction; the fingerprint identification units in the same row share the signal reading line; the film layer where the data line is located on one side of the substrate; the film layer where the signal reading line is located on one side, away from the substrate, of the film layer where the data line is located.
Fig. 10 is a schematic diagram illustrating a film structure of another display panel according to an embodiment of the present invention. As shown in fig. 2 and 10, the display area 110 of the display panel 100 is further provided with a plurality of signal reading lines 42 arranged along the row direction X and extending along the column direction Y, and the fingerprint identification units 20 in the same column share one signal reading line 42. The signal reading line 42 can transmit the fingerprint identification signal output from the fingerprint identification unit 20 to the fingerprint identification driving chip 60 to enable fingerprint identification. The signal readout line 42 for transmitting the fingerprint identification signal outputted from the fingerprint identification unit 20 and the data line 41 for transmitting the data signal to each sub-pixel 10 may be disposed on different layers, respectively. For example, the film 76 where the signal reading line 42 is located may be located on a side of the film 75 where the data line 41 is located away from the substrate 70, and at this time, the signal reading line 42 may be overlapped with the data line 41, so as to reduce the size of the non-opening area, further increase the aperture ratio of the display panel 100, further increase the area of the transparent area of the display panel 100, further improve the display effect of the display panel 100, and improve the fingerprint identification accuracy and sensitivity.
In addition, with reference to fig. 2, in order to enable the fingerprint identification unit 20 to realize the fingerprint identification function, a plurality of fingerprint identification control lines 32 extending along the row direction X and arranged along the column direction Y are further disposed in the display panel 100, and the fingerprint identification units 20 in the same row share the fingerprint identification control lines 32 to drive the fingerprint identification units 20 row by row, so that the fingerprint identification units 20 in each row transmit the fingerprint identification signal to the fingerprint identification driving chip 60 through each fingerprint identification reading line 42, thereby realizing the fingerprint identification function.
Meanwhile, the display driving chip 50 and the fingerprint identification driving chip 60 located in the non-display area 120 of the display panel 100 are respectively located at two opposite sides of the display area 110, so that the size of the lower frame can be reduced, which is beneficial to the high screen ratio of the display panel 100. In addition, the display driver chip 50 and the fingerprint identification driver chip 60 may also be located on the same side of the display area 110; alternatively, the functions of the display driver chip 50 and the fingerprint identification driver chip 60 may be integrated into one driver chip, so that one driver chip is used to implement the display and fingerprint identification functions, which is not specifically limited in the embodiment of the present invention.
It should be noted that, as can be understood by those skilled in the art, fig. 9 and fig. 10 only simply illustrate the relative position relationship between the film layers, so as to facilitate the description of the technical solution of the embodiment of the present invention, and do not specifically limit the embodiment of the present invention. In the following, in order to clearly illustrate the positional relationship between the film layers, the structures in the display panel are all exemplarily shown, but in practice, the display panel may further include other structures, and the arrangement manner of the structures is not limited thereto, and the embodiment of the present invention is not particularly limited thereto.
Optionally, the fingerprint identification unit includes a fingerprint identification element and a fingerprint identification driving circuit electrically connected to the fingerprint identification element; wherein, the orthographic projection of the fingerprint identification element on the substrate base plate and the orthographic projection of the fingerprint identification drive circuit on the substrate base plate have overlapping.
Illustratively, with continuing reference to fig. 2 and 9, the fingerprint identification unit 20 includes a fingerprint identification element 21 and a fingerprint identification driving circuit 22, wherein the fingerprint identification element 21 is electrically connected to the fingerprint identification driving circuit 22, so that the fingerprint identification driving circuit 22 can drive the fingerprint identification element 21 to perform fingerprint identification and output a fingerprint identification signal. Wherein the orthographic projection of the fingerprint identification element 21 on the substrate base plate 70 is overlapped with the orthographic projection of the fingerprint identification driving circuit 22 on the substrate base plate 70. In this way, the fingerprint identification unit 20 disposed in the non-opening area of the second sub-pixel 12 can be made smaller in size, so that the non-opening area of the second sub-pixel 12 can be made smaller in size to further improve the opening ratio of the display panel 100.
Optionally, the fingerprint identification element of the fingerprint identification unit may include a first electrode and a second electrode, and a PIN junction between the first electrode and the second electrode; the fingerprint identification driving circuit of the fingerprint identification unit comprises at least one thin film transistor; the thin film transistor includes an active layer; the active layer of the thin film transistor is positioned between the fingerprint identification element and the substrate base plate; and the active layer of the thin film transistor comprises a source region and a drain region, and the second electrode of the fingerprint identification element is electrically connected with the source region or the drain region of the active layer of the thin film transistor through the through hole.
Illustratively, with continued reference to fig. 9, the fingerprint identification element 21 includes a first electrode 211 and a second electrode 212, and a PIN junction 213 disposed between the first electrode 211 and the second electrode 212 to cause the fingerprint identification element 21 to generate an electrical signal for fingerprint identification upon receiving light reflected from the valleys and ridges of a finger. Accordingly, the fingerprint identification driving circuit 22 includes at least one thin film transistor electrically connectable to the fingerprint identification element 21, so that the fingerprint identification electrical signal generated by the fingerprint identification element 21 can be output through the thin film transistor. Wherein, the thin film transistor at least comprises an active layer 221, the active layer 221 may comprise a source region 2211 and a drain region 2212, and the second electrode 212 of the fingerprint identification element 21 may be electrically connected with the source region 2211 of the active layer 221 in the thin film transistor through a via hole. At this time, the fingerprint identification element 21 overlaps at least the source region of the active layer 221 in the thin film transistor of the fingerprint identification driving circuit 22, so that the fingerprint identification unit 20 has a smaller size to further reduce the size of the non-opening region in the second sub-pixel, so that the size of the opening region in the second sub-pixel is relatively increased, the aperture ratio of the display panel is further improved, the area of the light transmission region in the display panel is increased, the display brightness of the display panel is improved, and the sensitivity of fingerprint identification is improved.
When the thin film transistor of the fingerprint identification driving circuit is an N-type transistor, the source region of the active layer in the thin film transistor is electrically connected with the fingerprint identification element; when the thin film transistor of the fingerprint identification driving circuit is a P-type transistor, the drain region of the thin film transistor is electrically connected with the fingerprint identification element. On the basis of realizing that the fingerprint identification driving circuit drives the fingerprint identification element, the type of the thin film transistor in the fingerprint identification driving circuit is not particularly limited.
The active layer 221 of the thin film transistor in the fingerprint identification driving circuit and the active layer 71 of the thin film transistor in the pixel circuits (112 and 122) can be arranged on the same layer, and the grid electrode of the thin film transistor in the fingerprint identification driving circuit and the grid electrode 72 of the thin film transistor in the pixel circuits (112 and 122) are arranged on the same layer, so that the thin film transistor of the fingerprint identification driving circuit can be formed while the thin film transistor in the pixel circuits (112 and 122) is formed, the process steps are simplified, and the preparation cost of the display panel is reduced.
It should be noted that fig. 9 is a schematic diagram illustrating an embodiment of the present invention, and only one transistor is used to represent the fingerprint identification driving circuit in fig. 9, and in the embodiment of the present invention, the fingerprint identification driving circuit may further include other devices, for example, the fingerprint identification driving circuit may be a fingerprint identification driving circuit 1T1C, 2T1C, 3T1C, or 4T1C, where T is a transistor and C is a capacitor. Meanwhile, in fig. 9, the signal readout line 42 and the data line 41 are disposed on the same layer, and the above-mentioned case where the fingerprint identification element partially overlaps with the fingerprint identification driving circuit is also applicable to the case where the signal readout line 42 and the data line 41 are disposed on different layers.
Optionally, the display unit of each sub-pixel in the display panel at least includes a common electrode, the common electrode and the first electrode of the fingerprint identification element are disposed on the same layer, and the common electrode and the first electrode of the fingerprint identification element are insulated from each other. Therefore, the first electrode of the fingerprint identification element and the common electrode of the display unit can be made of the same material and formed in the same process, so that the process steps are simplified, and the production cost is reduced. Meanwhile, the first electrode of the fingerprint identification element and the common electrode of the display unit are insulated from each other, so that the signal provided by the fingerprint identification driving chip for the first electrode of the fingerprint identification element and the signal provided by the display driving chip for the common electrode of the display unit are not influenced by each other, the display effect of the display panel is improved, and the accuracy and the sensitivity of fingerprint identification are improved.
In the embodiment of the present invention, the display panel may be a liquid crystal display panel or an organic light emitting display panel. When the display panel is a liquid crystal display panel, the display unit of the display panel may include a color resistor, liquid crystal molecules, a pixel electrode, and a common electrode; when the display panel is an organic light emitting display panel, the display unit of the display panel may include an organic light emitting element, and the organic light emitting element may include an anode, a cathode, and a light emitting layer located between the anode and the cathode, where the cathode of the organic light emitting element is a common electrode of the display unit.
Fig. 11 is a schematic diagram illustrating a film structure of another display panel according to an embodiment of the present invention. As shown in fig. 11, the display panel 100 is a liquid crystal display panel, in which case the display panel 100 includes an array substrate 210, a counter substrate 220 disposed opposite to the array substrate 210, and a liquid crystal layer 230 located between the array substrate 210 and the counter substrate 220, the liquid crystal layer including liquid crystal molecules 231; the display unit includes a pixel electrode 78 and a common electrode 77, and the pixel electrode 78 may be located on a side of the common electrode 78 facing away from the substrate 70, such that the pixel electrode 78 and the common electrode 77 form an in-plane field. The pixel electrode 78 may be electrically connected to the pixel circuit (112 or 122) through a via hole penetrating through the insulating layer of the pixel electrode 78 and the common electrode 77, and penetrating through the common electrode 77 and the insulating layer between the common electrode 77 and the pixel circuit (112 or 122), so that the pixel circuit (112 or 122) can output a corresponding signal to the pixel electrode 78, so that an in-plane field formed between the pixel electrode 78 and the common electrode 77 drives liquid crystal molecules of the liquid crystal layer 230 to rotate in a plane, thereby enabling light to pass through the liquid crystal layer to the opposite substrate 220. The counter substrate 220 includes a base substrate 81 and a black matrix on one side of the base substrate 81 to shield the non-opening area from unnecessary light leakage. The black matrix 82 has an opening structure (not shown), and the color resistors (not shown) of the display units are at least located in the opening structure of the black matrix 82, so that light can pass through the color resistors of the opposite substrate 220, and a picture with rich colors can be displayed on the display surface of the display panel 100.
Since the first pixel circuit 112 and the second pixel electrode 122 are disposed in the non-opening area of the first sub-pixel 11, and the fingerprint identification unit (21 and 22) is disposed in the non-opening area of the second sub-pixel 12, when the size of the fingerprint identification unit (21 and 22) is equal to the size of one pixel circuit (112 or 122), the size of the first display unit disposed in the opening area of the first sub-pixel 11 can be increased, and at this time, the size of the pixel electrode of the first display unit should be larger than that of the pixel electrode of the second display unit, and the size of the color resistance 1111 of the first display unit should be larger than that of the color resistance of the second display unit 1211.
It should be noted that, in fig. 11, in order to embody that two pixel circuits are disposed in the first sub-pixel 11, only the fingerprint identification unit is disposed in the second sub-pixel 12, and only the film layer structure schematic diagram of the non-opening area is shown; the opening area includes a pixel electrode of the display unit in each sub-pixel, and a color resist pattern opposite to the pixel electrode, which are not shown in the figures. On the premise of improving the aperture opening ratio, the implementation of the invention does not specifically limit the film structure of the aperture area.
Fig. 12 is a schematic diagram illustrating a film structure of another display panel according to an embodiment of the present invention. As shown in fig. 12, the display panel 100 is an organic light emitting display panel, and the display unit of the display panel 100 may include an anode 101, a common electrode 103, and an organic light emitting layer 102 between the anode 101 and the common electrode 103. The anode 101 of the display unit can be electrically connected with the pixel circuit (112 or 122) through the via hole, so that the pixel circuit (112 or 122) can drive the display unit to emit light for display.
Wherein, since the first pixel circuit 112 and the second pixel electrode 122 are disposed in the non-opening area of the first sub-pixel and the fingerprint identification unit (21 and 22) is disposed in the non-opening area of the second sub-pixel, when the size of the fingerprint identification unit (21 and 22) is equivalent to the size of one pixel circuit (112 or 122), the size of the first display unit disposed in the opening area of the first sub-pixel can be increased appropriately, and at this time, the size of the organic light emitting layer 102 of the first display unit 111 should be larger than the size of the organic light emitting layer 102 of the second display unit 121.
In addition, the display panel 100 may further include an insulating layer between the functional layers, a support pillar 104, and a pixel defining layer 105 defining a pixel position. When the size of the organic light emitting layer 102 of the first display unit 111 is larger than the size of the organic light emitting layer 102 of the second display unit 121, the size of the area where the first display unit 111 defined by the pixel defining layer 105 is located is larger than the size of the area where the second display unit 121 defined by the pixel defining layer 105 is located.
Embodiments of the present invention further provide a display device, where the display device includes the display panel provided in the embodiments of the present invention, and therefore the display device also has the beneficial effects of the display panel provided in the embodiments of the present invention, and the same points can be understood with reference to the above description, and are not described in detail below.
For example, fig. 13 is a schematic structural diagram of a display device according to an embodiment of the present invention. As shown in fig. 13, the display device 200 includes the display panel 100 according to the embodiment of the present invention, and the display device 200 may be a mobile phone, a tablet computer, a smart wearable device (e.g., a smart watch), and other electronic devices with fingerprint identification function known to those skilled in the art, which is not limited in the embodiment of the present invention.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. 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, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims (16)

1. A display panel, comprising:
the display device comprises a substrate, a plurality of pixels and a plurality of pixel units, wherein the display area of the substrate is provided with a plurality of sub-pixels arranged in an array; each sub-pixel comprises an opening area and a non-opening area, and the opening area of the sub-pixel is provided with a display unit;
two adjacent sub-pixels are respectively a first sub-pixel and a second sub-pixel; the opening area of the first sub-pixel is provided with a first display unit, and the non-opening area of the first sub-pixel is provided with a first pixel circuit and a second pixel circuit; the opening area of the second sub-pixel is provided with a second display unit; the first display unit is electrically connected with the first pixel circuit, and the second display unit is electrically connected with the second pixel circuit;
the display panel further comprises a plurality of fingerprint identification units; the fingerprint identification unit is arranged in a non-opening area of the second sub-pixel.
2. The display panel according to claim 1, wherein the first sub-pixel and the second sub-pixel are two adjacent sub-pixels in the same row;
the first pixel circuit and the second pixel circuit which are positioned in the non-opening area of the same first sub-pixel are sequentially arranged along the row direction;
wherein, in the row direction, the width of the first sub-pixel is greater than the width of the second sub-pixel.
3. The display panel according to claim 2, further comprising: a plurality of scan lines extending in the row direction and arranged in the column direction, and a plurality of data lines extending in the column direction and arranged in the row direction; the row direction intersects the column direction;
the sub-pixels in the same row share a scanning line; the sub-pixels in the same column share a data line, and the first pixel circuit and the second pixel circuit which are positioned in the non-opening area of the same first sub-pixel are respectively and electrically connected with two adjacent data lines.
4. The display panel according to claim 1, wherein the first sub-pixel and the second sub-pixel are two adjacent sub-pixels in a same column;
the first pixel circuits and the second pixel circuits which are positioned in the non-opening area of the same first sub-pixel are sequentially arranged along the column direction;
wherein, in the column direction, a length of the first sub-pixel is greater than a length of the second sub-pixel.
5. The display panel according to claim 4, wherein a plurality of data lines extending in the column direction and arranged in a row direction;
and a plurality of scan line groups extending in the row direction and arranged in the column direction, each of the scan line groups including a first scan line and a second scan line; the row direction intersects the column direction;
the sub-pixels on the same row share the scanning line group; the sub-pixels in the same column share a data line, and the first pixel circuit and the second pixel circuit which are positioned in the non-opening area of the first sub-pixel are respectively and electrically connected with the first scanning line and the second scanning line of the same scanning line group;
the fingerprint identification unit is positioned on one side of the second display unit, which is far away from the first display unit.
6. The display panel according to claim 3 or 5, characterized by further comprising: a plurality of signal reading lines arranged in the row direction and extending in the column direction;
the fingerprint identification units in the same column share the signal reading line, and the signal reading line and the data line are arranged in the same layer.
7. The display panel according to claim 3 or 5, characterized by further comprising: a plurality of signal reading lines arranged in the row direction and extending in the column direction; the fingerprint identification units in the same column share the signal reading line;
the film layer where the data line is located on one side of the substrate base plate; the film layer where the signal reading line is located on one side, away from the substrate, of the film layer where the data line is located.
8. The display panel according to claim 1, wherein the fingerprint identification unit includes a fingerprint identification element and a fingerprint identification driving circuit electrically connected to the fingerprint identification element;
wherein the orthographic projection of the fingerprint identification element on the substrate base plate has an overlap with the orthographic projection of the fingerprint identification driving circuit on the substrate base plate.
9. The display panel of claim 8, wherein the fingerprint identification element comprises a first electrode and a second electrode, and a PIN junction between the first electrode and the second electrode;
the fingerprint identification driving circuit comprises at least one thin film transistor; the thin film transistor includes an active layer; the active layer is positioned between the fingerprint identification element and the substrate base plate; the active layer includes a source region and a drain region, and the second electrode is electrically connected to the source region or the drain region of the active layer through a via hole.
10. The display panel according to claim 8, wherein the display unit comprises at least a common electrode, the common electrode and the first electrode of the fingerprint identification element are disposed on the same layer, and the common electrode and the first electrode of the fingerprint identification element are insulated from each other.
11. The display panel according to claim 10, wherein the display unit further comprises a pixel electrode; the pixel electrode is positioned on one side of the common electrode, which is far away from the substrate base plate.
12. The display panel according to claim 10, wherein the display unit further comprises an anode and an organic light emitting layer between the anode and the common electrode.
13. The display panel according to claim 1, further comprising a third sub-pixel adjacent to the first sub-pixel or the second sub-pixel;
the opening area of the third sub-pixel is provided with a third display unit, the non-opening area of the third sub-pixel is provided with a third pixel circuit, and the third display unit is electrically connected with the third pixel circuit; wherein the display colors of the first display unit, the second display unit and the third display unit are different from each other.
14. The display panel according to claim 13, wherein the display color of the first display unit is blue, the display color of the second display unit is red or green, and the display color of the third display unit is green or red.
15. The display panel according to claim 1, wherein the first sub-pixel and the second sub-pixel are sequentially arranged at intervals in a row direction or a column direction; wherein the row direction intersects the column direction.
16. A display device, comprising: the display panel according to any one of claims 1 to 15.
CN201911342572.7A 2019-12-23 2019-12-23 Display panel and display device Active CN111025722B (en)

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