CN107749419B - Electroluminescent display panel and display device - Google Patents

Electroluminescent display panel and display device Download PDF

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Publication number
CN107749419B
CN107749419B CN201711043475.9A CN201711043475A CN107749419B CN 107749419 B CN107749419 B CN 107749419B CN 201711043475 A CN201711043475 A CN 201711043475A CN 107749419 B CN107749419 B CN 107749419B
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China
Prior art keywords
fingerprint identification
display panel
electroluminescent display
area
light emitting
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CN201711043475.9A
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CN107749419A (en
Inventor
马扬昭
彭涛
王永志
李波
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Wuhan Tianma Microelectronics Co Ltd
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Wuhan Tianma Microelectronics Co Ltd
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    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H01L27/00Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
    • H01L27/28Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including components using organic materials as the active part, or using a combination of organic materials with other materials as the active part
    • H01L27/32Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including components using organic materials as the active part, or using a combination of organic materials with other materials as the active part with components specially adapted for light emission, e.g. flat-panel displays using organic light-emitting diodes [OLED]
    • H01L27/3225OLED integrated with another component
    • GPHYSICS
    • G06COMPUTING; CALCULATING; COUNTING
    • G06KRECOGNITION OF DATA; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K9/00Methods or arrangements for reading or recognising printed or written characters or for recognising patterns, e.g. fingerprints
    • G06K9/00006Acquiring or recognising fingerprints or palmprints
    • G06K9/00013Image acquisition
    • G06K9/0002Image acquisition by non-optical methods, e.g. by ultrasonic or capacitive sensing
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H01L27/00Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
    • H01L27/28Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including components using organic materials as the active part, or using a combination of organic materials with other materials as the active part
    • H01L27/32Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including components using organic materials as the active part, or using a combination of organic materials with other materials as the active part with components specially adapted for light emission, e.g. flat-panel displays using organic light-emitting diodes [OLED]
    • H01L27/3225OLED integrated with another component
    • H01L27/323OLED integrated with another component the other component being a touch screen
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H01L27/00Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
    • H01L27/28Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including components using organic materials as the active part, or using a combination of organic materials with other materials as the active part
    • H01L27/32Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including components using organic materials as the active part, or using a combination of organic materials with other materials as the active part with components specially adapted for light emission, e.g. flat-panel displays using organic light-emitting diodes [OLED]
    • H01L27/3241Matrix-type displays
    • H01L27/3244Active matrix displays
    • H01L27/3276Wiring lines

Abstract

The invention discloses an electroluminescent display panel and a display device, comprising: a display area and a fingerprint identification area; the display area includes: a display pixel unit; the display pixel unit includes: a first pixel control circuit and a first light emitting unit; the first light emitting unit includes a first anode; the fingerprint identification area includes: the fingerprint identification device comprises a plurality of capacitive fingerprint identification electrodes arranged in an array manner, and electrode wires which are arranged in one-to-one correspondence with the capacitive fingerprint identification electrodes and are electrically connected with the capacitive fingerprint identification electrodes; the capacitive fingerprint identification electrode and the first anode are made of the same material and are arranged on the same layer. The capacitive fingerprint identification electrode is arranged inside the electroluminescent display panel, so that the thickness of the electroluminescent display panel is reduced, and the thin design is facilitated; in addition, the finger capacitance type grain recognition electrode and the first anode are made of the same material and arranged on the same layer, so that the manufacturing difficulty of the electroluminescent display panel can be effectively reduced, and the manufacturing cost is saved.

Description

Electroluminescent display panel and display device
Technical Field
The present invention relates to the field of display technologies, and in particular, to an electroluminescent display panel and a display device.
Background
An Organic Light Emitting Diode (OLED) display is a self-luminous display, has the characteristics of lightness, thinness, high chromaticity, wide viewing angle, high response speed and the like, and has a great development prospect in the technical field of display. In order to provide the display with the fingerprint recognition function, a fingerprint recognition area is generally arranged in a non-display area of the display, on a display surface of the display or on a back surface of the display, and a fingerprint recognition structure is generally arranged in the fingerprint recognition area; however, the arrangement of such a structure is not beneficial to the design of thinning the display and the design of a narrow frame of the display; therefore, how to realize the thin design and the narrow frame design of the display becomes a technical problem to be solved urgently by the technical personnel in the field.
Disclosure of Invention
The embodiment of the invention provides an electroluminescent display panel and a display device, which are used for solving the problems of how to realize the thin design and narrow frame design of a display in the prior art.
An embodiment of the present invention provides an electroluminescent display panel, including: a display area and a fingerprint identification area; wherein the content of the first and second substances,
the display area includes: a display pixel unit; the display pixel unit includes: a first pixel control circuit and a first light emitting unit; the first light emitting unit includes a first anode;
the fingerprint identification area includes: the fingerprint identification device comprises a plurality of capacitive fingerprint identification electrodes arranged in an array manner, and electrode wires which are arranged in one-to-one correspondence with the capacitive fingerprint identification electrodes and are electrically connected with the capacitive fingerprint identification electrodes; the capacitive fingerprint identification electrode and the first anode are made of the same material and are arranged on the same layer.
On the other hand, an embodiment of the present invention further provides a display device, including: the electroluminescent display panel provided by the embodiment of the invention.
The invention has the following beneficial effects:
an embodiment of the present invention provides an electroluminescent display panel and a display device, including: a display area and a fingerprint identification area; wherein the display area includes: a display pixel unit; the display pixel unit includes: a first pixel control circuit and a first light emitting unit; the first light emitting unit includes a first anode; the fingerprint identification area includes: the fingerprint identification device comprises a plurality of capacitive fingerprint identification electrodes arranged in an array manner, and electrode wires which are arranged in one-to-one correspondence with the capacitive fingerprint identification electrodes and are electrically connected with the capacitive fingerprint identification electrodes; the capacitive fingerprint identification electrode and the first anode are made of the same material and are arranged on the same layer. The capacitive fingerprint identification electrode is arranged in the electroluminescent display panel through the arrangement of the capacitive fingerprint identification electrode in the fingerprint identification area, so that the thickness of the electroluminescent display panel is reduced, and the thin design is favorably realized; in addition, the finger capacitance type grain recognition electrode and the first anode are made of the same material and arranged on the same layer, so that the manufacturing difficulty of the electroluminescent display panel can be effectively reduced, and the manufacturing cost is saved.
Drawings
Fig. 1 is a top view of an electroluminescent display panel provided in an embodiment of the present invention;
fig. 2 to 4 are sectional views taken along the dotted line X-X' shown in fig. 1, respectively;
fig. 5 is a schematic structural diagram of a display device provided in an embodiment of the present invention.
Detailed Description
The following description will be made in detail with reference to the accompanying drawings for describing an embodiment of an electroluminescent display panel and a display device according to the present invention. It should be noted that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
An embodiment of the present invention provides an electroluminescent display panel, as shown in fig. 1 to 4, wherein fig. 1 is a top view of the electroluminescent display panel, and fig. 2 to 4 are cross-sectional views taken along a dotted line X-X' shown in fig. 1; the electroluminescent display panel may include: a display area and a fingerprint identification area 10; wherein the content of the first and second substances,
the display area includes: a display pixel unit 11; the display pixel unit 11 includes: a first pixel control circuit 12 and a first light emitting unit 13; the first light emitting unit 13 includes a first anode 14;
the fingerprint identification area 10 includes: the fingerprint identification device comprises a plurality of capacitive fingerprint identification electrodes 15 which are arranged in an array manner, and electrode wires 16 which are arranged in one-to-one correspondence with the capacitive fingerprint identification electrodes 15 and are electrically connected with the capacitive fingerprint identification electrodes; the capacitive fingerprint identification electrode 15 and the first anode 14 are made of the same material and are arranged on the same layer.
According to the electroluminescent display panel and the display device provided by the embodiment of the invention, the capacitive fingerprint identification electrode 15 is arranged in the electroluminescent display panel through the arrangement of the capacitive fingerprint identification electrode 15 in the fingerprint identification area 10, so that the thickness of the electroluminescent display panel is favorably reduced, and the thin design is favorably realized; in addition, the finger capacitance type pattern recognition electrode 15 and the first anode 14 are made of the same material and arranged on the same layer, so that the manufacturing difficulty of the electroluminescent display panel can be effectively reduced, and the manufacturing cost is saved.
In specific implementation, since the display pixel unit 11 is used for displaying an image, as shown in fig. 2 to 4, in the electroluminescent display panel provided in the embodiment of the present invention, the first pixel control circuit 12 is electrically connected to the first light emitting unit 13, that is, the first pixel control circuit 12 is electrically connected to the first light emitting unit 13 through a via, that is, the first pixel control circuit 12 is electrically connected to the first anode 14 through a via (as shown by a solid coil), and the first pixel control circuit 12 is used for controlling the light emitting condition of the first light emitting unit 13, so as to control the image displayed by the electroluminescent display panel and improve the display quality of the display screen; also, the first light emitting unit 13 may further include: the light-emitting layer 17 and the cathode 18 inject holes into the light-emitting layer 17 through the first anode 14, and electrons into the light-emitting layer 17 through the cathode 18, and the electrons and the holes are recombined in the light-emitting layer 17 to excite the light-emitting layer 17 to emit light, thereby realizing a display function.
Specifically, when the electroluminescent display panel is a top emission type display panel, in the above electroluminescent display panel provided by an embodiment of the present invention, as shown in fig. 2 to 4, the first anode 14 may include: a first transparent electrode m1 and a reflective electrode n provided in a stack; since holes need to be injected from the anode, a transparent material with a large work function is generally selected as the first transparent electrode m1, that is, a transparent metal oxide such as indium tin oxide is generally selected as the first transparent electrode m1, so as to achieve effective injection of holes and achieve light emission, and the transparent metal oxide may be specifically selected according to actual needs, which is not limited herein; moreover, since the reflective electrode n is used to reflect the light emitted from the light-emitting layer 17 and increase the display brightness of the display pixel unit 11, the reflective electrode n is generally made of a metal material, such as metal silver, which is a substance that is relatively easy to oxidize, and in the manufacturing process of the electroluminescent display panel, to avoid the oxidation of the metal silver, the metal silver is generally made between two layers of the first transparent electrodes m1, as shown in fig. 2 to 4; based on this, in order to reduce the manufacturing process of the electroluminescent display panel and further reduce the manufacturing difficulty, in the electroluminescent display panel provided in the embodiment of the present invention, the capacitive fingerprint identification electrode 15 may be made of the same material as the first transparent electrode m1 in the first anode 14 and disposed on the same layer, as shown in fig. 2, that is, the capacitive fingerprint identification electrode 15 is simultaneously manufactured when the first transparent electrode m1 is manufactured, which is beneficial to implementing the thin design and narrow frame design of the electroluminescent display panel, and meanwhile, the manufacturing process may also be reduced, which is beneficial to reducing the manufacturing difficulty of the electroluminescent display panel and saving the manufacturing cost; meanwhile, in the fingerprint identification area 10, the capacitive fingerprint identification electrode 15 and the first transparent electrode m1 are made of the same material and are arranged on the same layer, so that interference of light reflected when the reflective electrode n is arranged in the fingerprint identification area 10 on the capacitive fingerprint identification electrode 15 can be avoided, and the accuracy of fingerprint identification can be improved.
In a specific implementation, when the fingerprint identification area 10 is set, in the above electroluminescent display panel provided in an embodiment of the present invention, as shown in fig. 3, the fingerprint identification area 10 may include, in addition to the capacitive fingerprint identification electrode 15 and the electrode line 16, the fingerprint identification area 10 further includes: a second pixel control circuit 19 and a second light emitting unit 20; the second pixel control circuit 19 and the second light emitting unit 20 are insulated from each other, so that the fingerprint identification area 10 does not have a display function, interference on fingerprint identification when an image is displayed is avoided, and accuracy of fingerprint identification is prevented from being reduced; in addition, since the fingerprint identification area 10 has the second pixel control circuit 19 and the second light emitting unit 20, and the second pixel control circuit 19 and the second light emitting unit 20 are insulated from each other, in the process of manufacturing the second pixel control circuit 19 and the second light emitting unit 20, only the mask for manufacturing the second anode 21 in the second light emitting unit 20 needs to be redesigned, and when manufacturing the second pixel control circuit 19 and the light emitting layer 17 in the second light emitting unit 20, the same mask as that for manufacturing the light emitting layer 17 in the first pixel control circuit 12 and the first light emitting unit 13 can be adopted, so that the design difficulty can be greatly reduced.
Of course, in order to simplify the manufacturing process of the electroluminescent display panel, as shown in fig. 4, the fingerprint identification area 10 may only include the second light emitting unit 20, but not include the second pixel control circuit 19, and therefore, in the electroluminescent display panel provided in the embodiment of the present invention, the fingerprint identification area 10 may further include: the second light-emitting unit 20 only needs to redesign the mask of the second anode 21 when the second light-emitting unit 20 is manufactured, and the mask same as the mask used for manufacturing the light-emitting layer 17 in the first light-emitting unit 13 can be used when the light-emitting layer 17 is manufactured, so that the manufacturing process of the electroluminescent display panel is simplified, and the manufacturing difficulty is reduced.
Specifically, when the second light emitting unit 20 is included in the fingerprint identification area 10, in the above electroluminescent display panel provided by the embodiment of the present invention, as shown in fig. 3 and 4, the second light emitting unit 20 may only include: a second anode 21 and a light emitting layer 17, and the second anode 21 includes only a second transparent electrode m 2; that is, the second light emitting unit 20 does not include a cathode, because the capacitive fingerprint identification electrode 15 detects a contact signal by using the working principle of self-capacitance, and because the surface of the finger is uneven, a finger generates different contact signals when contacting the electroluminescent display panel, and then the function of fingerprint identification is realized according to the capacitance difference between the peak and the trough; in addition, since the capacitive fingerprint identification electrode 15 and the first transparent electrode m1 in the first anode 14 are made of the same material and are disposed on the same layer, when the second light emitting unit 20 includes a cathode, the cathode is located between the capacitive fingerprint identification electrode 15 and a finger, so that a cathode signal introduced by the cathode inevitably interferes with a contact signal on the capacitive fingerprint identification electrode 15, thereby affecting the accuracy of fingerprint identification, and when the fingerprint identification area 10 includes the second light emitting unit 20, the second light emitting unit 20 does not include the cathode.
It should be noted that, when the light emitting layers in the whole electroluminescent display panel emit white light, the light emitting layer in the first light emitting unit 13 is the same as the light emitting layer in the second light emitting unit 20, and is not greatly different from the light emitting layer in the first light emitting unit 13, and can be manufactured at the same time, so the light emitting layer in the first light emitting unit 13 and the light emitting layer in the second light emitting unit 20 can be both denoted by 17; in addition, in order to realize image display, a color film layer (not shown in the figure) needs to be disposed on one side of the light-emitting surface of the electroluminescent display panel, so that different display pixel units 11 emit different lights, thereby realizing image display; of course, two adjacent light emitting layers in the row direction or the column direction can also emit light with different colors, and at this time, a color film layer does not need to be arranged on one side of the light emitting surface of the electroluminescent display panel, and the display of images can be realized only by the color emitted by each light emitting layer.
Further, generally, the cathode covers the entire surface of the display panel, if the second light emitting unit 20 does not include the cathode according to the above description, the area except for the second light emitting unit 20 in the fingerprint identification area 10 may have the cathode, so that the mask for manufacturing the cathode needs to be specially designed to make the position corresponding to the second light emitting unit 20 be a non-light-transmitting area, so that in the manufacturing process of the cathode, control on the micrometer level is required, which increases the difficulty in manufacturing the cathode; therefore, in order to reduce the manufacturing difficulty, in the electroluminescent display panel provided in the embodiment of the present invention, as shown in fig. 2 to 4, the fingerprint identification area 10 has no cathode, that is, no cathode is disposed in the entire fingerprint identification area 10, but only the display area is provided with a cathode, so that the usage of cathode materials is reduced, the manufacturing materials are saved, the manufacturing process of the cathode is controlled to be in the millimeter level, the manufacturing difficulty is greatly reduced, and meanwhile, the influence of the cathode in the area other than the second light emitting unit 20 in the fingerprint identification area 10 on the capacitive fingerprint identification electrode 15 is avoided, so as to improve the accuracy of fingerprint identification.
Further, since the second anode 21 includes only the second transparent electrode m2, in the above-described electroluminescent display panel provided by the embodiment of the present invention, as shown in fig. 3 and 4, the capacitive fingerprint recognition electrode 15 may be composed of at least one second transparent electrode m 2; it should be noted that fig. 3 and 4 are only used to illustrate the arrangement position of the capacitive fingerprint identification electrode 15, and the capacitive fingerprint identification electrode 15 is not limited to be composed of one second transparent electrode m 2.
Further, since the size of each display pixel unit 11 is generally not greater than 50 micrometers × 50 micrometers, when the capacitive fingerprint identification electrode 15 is composed of a plurality of second transparent electrodes m2, in the above electroluminescent display panel provided in the embodiment of the present invention, the capacitive fingerprint identification electrode 15 is generally configured to be square (as shown in fig. 1), so that it is ensured that each capacitive fingerprint identification electrode 15 can uniformly detect the change in capacitance while being convenient to manufacture; moreover, the area of the capacitive fingerprint identification electrode 15 is generally less than 1 square millimeter, so as to ensure the accuracy of fingerprint identification; of course, the shape of the capacitive fingerprint recognition electrode 15 is not limited to a square, but may also be a rectangle with a length and a width close to each other, or other shapes, as long as it can ensure accurate fingerprint recognition, and is not limited herein.
In practical implementation, the electroluminescent display panel generally has a pixel defining layer for defining the display pixel unit 11, so that the pixel defining layer has an opening structure at a position corresponding to the display pixel unit 11, so as to implement the display function of the display pixel unit 11; when the fingerprint identification area 10 does not have the display function, the pixel defining layer may have no opening structure in the corresponding fingerprint identification area 10, so that, as shown in fig. 2 to 4, in the above electroluminescent display panel provided in the embodiment of the present invention, when the electroluminescent display panel may further include the pixel defining layer 22 disposed on the light exit surface side of the electroluminescent display panel, the pixel defining layer 22 has an opening structure in the area where the first light emitting unit 13 is located; the pixel defining layer 22 has no opening structure in the fingerprint identification area 10, so as to simplify the manufacturing process of the electroluminescent display panel, reduce the manufacturing difficulty, and ensure the normal display image in the display area.
In addition, when the light emitting layer 17 is manufactured by an inkjet printing method, it is necessary to first manufacture an opening structure in the area where the first light emitting unit 13 is located through the pixel defining layer 22, and then manufacture the light emitting layer 17 at the opening structure by an inkjet printer; however, since the fingerprint identification area 10 does not have a display function, the pixel defining layer 22 has no opening structure in the fingerprint identification area 10, so that the light emitting layer 17 is not required to be manufactured, and the second light emitting unit 20 is not required to be arranged in the fingerprint identification area 10; or when the second light emitting unit 20 is provided, the second light emitting unit 20 includes only the second anode 21, and the second anode 21 includes only the second transparent electrode m 2; in this way, the capacitive fingerprint recognition electrode 15 does not contact the light emitting layer 17, and the problem of signal crosstalk caused by the capacitive fingerprint recognition electrode can be avoided.
Of course, the method of forming the light emitting layer 17 is not limited to the inkjet printing method, and is only described here by way of example, and therefore, other methods known to those skilled in the art may be used for forming the light emitting layer 17, and the method is not limited herein.
Specifically, the opening structure has a first orthographic projection to the electroluminescent display panel; when the first light emitting unit 13 has a second orthographic projection to the electroluminescent display panel, in the above electroluminescent display panel provided in the embodiment of the present invention, the area of the first orthographic projection may be set to be the same as the area of the second orthographic projection, as shown in fig. 2 to 4; the reason for this is as follows: if the area of the first orthographic projection is larger than that of the second orthographic projection, the opening structure is relatively large, and the first light-emitting unit 13 is relatively small, so that the opening structure is not fully utilized, and the opening ratio of the electroluminescent display panel is reduced; if the area of the first orthographic projection is smaller than the area of the second orthographic projection, that is, the opening structure is relatively small, and the first light-emitting unit 13 is relatively large, more parts of the first light-emitting unit 13 are covered by the pixel defining layer 22, so that the area for effectively emitting light is small, which not only causes material waste, but also causes a reduction in the opening ratio; therefore, only when the area of the first orthographic projection is equal to the area of the second orthographic projection, effective light emission of the first light emitting unit 13 can be ensured, thereby ensuring the quality of a displayed image.
In specific implementation, in the structure shown in fig. 1, the fingerprint identification area 10 is disposed in the display area, so that the occupied area of the non-display area can be effectively reduced, which is beneficial to implementing the design of a narrow frame; furthermore, in order to implement the display function, various signal lines are distributed in the display area for transmitting various signals, and each signal line generally needs to penetrate through the entire display area, i.e. from the left frame to the right frame along the row direction, or from the top frame to the bottom frame along the column direction, therefore, in the above-mentioned electroluminescent display panel provided in the embodiment of the present invention, as shown in fig. 3, the display area may further include: a first signal line 23 electrically connected to the first pixel control circuit 12; but since the fingerprint identification area 10 is disposed in the display area, a portion of the first signal line 23 cannot completely pass through the display area, but has to be disconnected at the fingerprint identification area 10, so that the voltage drop of the portion of the first signal line 23 is different from that of the portion of the first signal line 23 passing through the entire display panel, thereby causing display non-uniformity of the entire electroluminescent display panel; therefore, in order to solve the problem of display unevenness caused by different voltage drops, the fingerprint identification area 10 may further include: a second signal line 24 made of the same material as the first signal line 23 and disposed on the same layer, that is, the first signal line 23 and the second signal line 24 are manufactured together; furthermore, the first signal line 23 and the second signal line 24 can be electrically connected (not shown in fig. 3), that is, the first signal line 23 and the second signal line 24 have the same potential, so that the quality of the image displayed by the electroluminescent display panel is ensured, and the display quality is prevented from being reduced due to the display difference caused by the voltage drop of the signal lines.
Moreover, since the fingerprint identification area 10 has no display function, when the fingerprint identification area 10 has the second pixel control circuit 19 and the second light emitting unit 20, the number of the second pixel control circuit 19 and the second light emitting unit 20 is smaller than the number of the first pixel control circuit 12 and the first light emitting unit 13 in the display area, so that the first signal line 23 and the second signal line 24 are taken as the reference signal lines as an example, the load of the reference signal lines in the fingerprint identification area 10 is smaller, which causes the voltage drop on the reference signal lines on the whole electroluminescent display panel to be different, and the quality of the display picture is affected, so as to avoid this, the load can be added in the fingerprint identification area 10 to make the potential on the reference signal lines uniform, therefore, the specific load setting can be determined according to the actual needs, as long as the quality of the display picture can be ensured, and is not limited herein.
Specifically, in the above electroluminescent display panel provided in the embodiment of the present invention, the first signal line 23 and the second signal line 24 may be both a gate line, a data line, a power supply voltage signal line or a reference signal line; of course, the signal lines may be used for transmitting other signals, and are not limited herein.
In practical implementation, in the above-mentioned electroluminescent display panel provided in the embodiment of the present invention, the fingerprint identification area 10 is generally disposed at an edge position of the electroluminescent display panel. The electroluminescent display panel is generally located near the lower frame, as shown in fig. 1, but is not limited thereto, as long as it is ensured that the user can conveniently control the display by inputting a fingerprint from the fingerprint recognition area 10, and the invention is not limited thereto.
In practical implementation, in order to implement a display function in the display area, in the electroluminescent display panel provided in the embodiment of the present invention, as shown in fig. 2 to 4, the first pixel control circuit 12 may include: a thin film transistor for controlling the light emission of the first light emitting unit 13; moreover, the electrode lines 16 in the fingerprint identification area 10 may be made of the same material as the source/drain electrodes D in the thin film transistors and disposed on the same layer, and the extending direction of the electrode lines 16 is the same as the extending direction of the data lines, that is, the electrode lines extend along the direction of the pixel columns, so that the interference caused by the intersection of the electrode lines 16 and the data lines is avoided while the manufacturing process of the electroluminescent display panel is simplified, and thus, the normal transmission of fingerprint identification signals can be ensured, and the normal operation of the electroluminescent display panel can also be ensured.
It should be noted that, in order to implement the fingerprint identification function, as shown in fig. 1, in the above electroluminescent display panel provided in the embodiment of the present invention, the electroluminescent display panel may further include: the fingerprint identification processor 25, and the fingerprint identification processor 25 is electrically connected with each electrode 16; the fingerprint identification processor 25 is configured to receive the contact signal output by the corresponding capacitive fingerprint identification electrode 15 transmitted by the electrode line 16, process the contact signal, determine a fingerprint identification result, and send the result to a driving chip (not shown in the figure) in the electroluminescent display panel, so as to control the display through fingerprint input.
Based on the same inventive concept, an embodiment of the present invention further provides a display device, as shown in fig. 5, including: the above electroluminescent display panel 100 according to the embodiment of the present invention, wherein 10 denotes a fingerprint identification area in the electroluminescent display panel 100. The display device may be: any product or component with a display function, such as a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, a navigator and the like. The implementation of the display device can be seen in the above-mentioned embodiment of the electroluminescent display panel, and repeated descriptions are omitted.
The embodiment of the invention provides an electroluminescent display panel and a display device, comprising: a display area and a fingerprint identification area; wherein the display area includes: a display pixel unit; the display pixel unit includes: a first pixel control circuit and a first light emitting unit; the first light emitting unit includes a first anode; the fingerprint identification area includes: the fingerprint identification device comprises a plurality of capacitive fingerprint identification electrodes arranged in an array manner, and electrode wires which are arranged in one-to-one correspondence with the capacitive fingerprint identification electrodes and are electrically connected with the capacitive fingerprint identification electrodes; the capacitive fingerprint identification electrode and the first anode are made of the same material and are arranged on the same layer. The capacitive fingerprint identification electrode is arranged in the electroluminescent display panel through the arrangement of the capacitive fingerprint identification electrode in the fingerprint identification area, so that the thickness of the electroluminescent display panel is reduced, and the thin design is favorably realized; in addition, the finger capacitance type grain recognition electrode and the first anode are made of the same material and arranged on the same layer, so that the manufacturing difficulty of the electroluminescent display panel can be effectively reduced, and the manufacturing cost is saved.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims (14)

1. An electroluminescent display panel comprising: a display area and a fingerprint identification area; the display area and the fingerprint identification area are two different areas; wherein the content of the first and second substances,
the display area includes: a display pixel unit; the display pixel unit includes: a first pixel control circuit and a first light emitting unit; the first light emitting unit includes a first anode, a light emitting layer, and a cathode;
the fingerprint identification area includes: the fingerprint identification device comprises a plurality of capacitive fingerprint identification electrodes arranged in an array manner, and electrode wires which are arranged in one-to-one correspondence with the capacitive fingerprint identification electrodes and are electrically connected with the capacitive fingerprint identification electrodes; the capacitive fingerprint identification electrode and the first anode are made of the same material and are arranged on the same layer;
the fingerprint identification area further includes: a second light emitting unit; the second light emitting unit includes only a second anode and a light emitting layer, and the fingerprint identification area has no cathode.
2. The electroluminescent display panel of claim 1, wherein the first anode comprises: a first transparent electrode and a reflective electrode which are arranged in a stacked manner;
the capacitive fingerprint identification electrode and the first transparent electrode are made of the same material and are arranged on the same layer.
3. The electroluminescent display panel of claim 2, wherein the first pixel control circuit is electrically connected to the first light emitting cell.
4. The electroluminescent display panel of claim 2, wherein the fingerprint identification area further comprises: a second pixel control circuit;
the second pixel control circuit and the second light emitting unit are insulated from each other.
5. The electroluminescent display panel of claim 4, wherein the second anode comprises only a second transparent electrode.
6. The electroluminescent display panel of claim 5, wherein the capacitive fingerprint recognition electrode is comprised of at least one of the second transparent electrodes.
7. The electroluminescent display panel of claim 6, wherein the capacitive fingerprint recognition electrode is comprised of a plurality of the second transparent electrodes;
the capacitive fingerprint identification electrode is square; and the area of the capacitive fingerprint identification electrode is less than 1 square millimeter.
8. The electroluminescent display panel of claim 1, further comprising: the pixel limiting layer is arranged on one side of the light-emitting surface of the electroluminescent display panel;
the pixel defining layer has an opening structure in a region where the first light emitting unit is located;
the pixel definition layer is free of an opening structure in the fingerprint identification area.
9. The electroluminescent display panel of claim 8, wherein the opening structure has a first orthographic projection to the electroluminescent display panel; the first light emitting unit has a second orthographic projection to the electroluminescent display panel;
the area of the first orthographic projection is the same as the area of the second orthographic projection.
10. The electroluminescent display panel of claim 1, wherein the display area further comprises: a first signal line electrically connected to the first pixel control circuit;
the fingerprint identification area further includes: and the second signal line is made of the same material as the first signal line and arranged on the same layer.
11. The electroluminescent display panel of claim 10, wherein the first signal line and the second signal line are a gate line, a data line, a power supply voltage signal line, or a reference signal line.
12. The electroluminescent display panel of claim 1, wherein the fingerprint identification area is disposed at an edge location of the electroluminescent display panel.
13. The electroluminescent display panel of claim 1, wherein the first pixel control circuit comprises: a thin film transistor;
the electrode wire and the source/drain electrode in the thin film transistor are made of the same material and are arranged in the same layer.
14. A display device, comprising: an electroluminescent display panel as claimed in any one of claims 1 to 13.
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