CN112993179B - Display panel and display device - Google Patents

Display panel and display device Download PDF

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Publication number
CN112993179B
CN112993179B CN202011483610.3A CN202011483610A CN112993179B CN 112993179 B CN112993179 B CN 112993179B CN 202011483610 A CN202011483610 A CN 202011483610A CN 112993179 B CN112993179 B CN 112993179B
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transistor
light
emitting unit
display panel
electrode
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CN112993179A (en
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张振宇
顾维杰
冯彦贵
张民
蔡勤山
张福爽
郭志林
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Hefei Visionox Technology Co Ltd
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Hefei Visionox Technology Co Ltd
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    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K50/00—Organic light-emitting devices
    • H10K50/80—Constructional details
    • H10K50/805—Electrodes
    • H10K50/81—Anodes
    • H10K50/816—Multilayers, e.g. transparent multilayers
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
    • G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
    • G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
    • G09F9/33—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements being semiconductor devices, e.g. diodes
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K50/00—Organic light-emitting devices
    • H10K50/80—Constructional details
    • H10K50/805—Electrodes
    • H10K50/81—Anodes
    • 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
    • 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
    • H10K59/60—OLEDs integrated with inorganic light-sensitive elements, e.g. with inorganic solar cells or inorganic photodiodes

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Optics & Photonics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Sustainable Development (AREA)
  • Electroluminescent Light Sources (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)

Abstract

The application relates to the technical field of display, concretely relates to display panel and display device, display panel includes the printing opacity display area, and the printing opacity display area includes a plurality of first luminescence units and a plurality of second luminescence unit, and first luminescence unit is including deviating from the first electrode on the display panel play plain noodles, and the second luminescence unit is including deviating from the second electrode on the display panel play plain noodles, and wherein, first electrode is the light-transmitting electrode, and the second electrode is non-light-transmitting electrode. The display panel can realize full-screen display of the display panel, and display is uniform and transition is natural.

Description

Display panel and display device
Technical Field
The present disclosure relates to display technologies, and particularly to a display panel and a display device.
Background
With the development of the full-screen technology, the technology of placing photosensitive elements such as cameras under a display screen is a development trend. The display area of the display screen in the related art is usually reserved with a part of area for installing the photosensitive elements, which affects the overall consistency of the screen and the display effect.
Disclosure of Invention
In view of this, the present disclosure provides a display panel and a display device, which can improve the overall screen display effect.
In order to solve the technical problem, the application adopts a technical scheme that: the display panel comprises a light-transmitting display area, wherein the light-transmitting display area comprises a plurality of first light-emitting units and a plurality of second light-emitting units, the first light-emitting units comprise first electrodes deviating from a light-emitting surface of the display panel, the second light-emitting units comprise second electrodes deviating from the light-emitting surface of the display panel, the first electrodes are light-transmitting electrodes, and the second electrodes are non-light-transmitting electrodes.
Wherein, the side of the light-transmitting display area close to the non-light-emitting surface is correspondingly provided with a photosensitive element; when the photosensitive element works, the first light-emitting unit is closed, and the second light-emitting unit works; when the photosensitive element is closed, the first light-emitting unit and the second light-emitting unit work simultaneously or are closed simultaneously.
The display panel further comprises a pixel circuit, and the pixel circuit is at least used for controlling the first light-emitting unit to be closed and driving the second light-emitting unit to work to emit light.
Wherein, the display panel includes: and the light transmittance of the conventional display area is smaller than that of the light-transmitting display area.
The pixel circuit comprises a wire, wherein the wire respectively connected with the first electrode and the second electrode is a transparent wire.
The pixel circuit comprises a control module, the control module is connected with the first light-emitting unit, the control module is in a cut-off state in the closing stage of the photosensitive element, and the first light-emitting unit is closed.
Wherein the control module comprises a control transistor.
The first end of the control transistor is connected with the scanning line, the second end of the control transistor is connected with the first light-emitting unit, and the first light-emitting unit is turned off when the amplitude of a scanning signal output by the scanning line is within a first preset voltage range;
the pixel circuit further comprises a driving circuit, wherein the driving circuit is connected with the second light-emitting unit and used for driving the second light-emitting unit to work when the amplitude of a signal output by the driving circuit is within a second preset voltage range.
The driving circuit comprises a first transistor, a second transistor, a third transistor, a fourth transistor, a fifth transistor, a sixth transistor, a seventh transistor, an eighth transistor and a storage capacitor;
the first end of the first transistor is connected with the data signal end, the second end of the first transistor is connected with the second scanning line, and the third end of the first transistor is connected with the first end of the third transistor;
the first end of the second transistor is connected with the voltage signal end, the second end of the second transistor is connected with the control signal end, and the third end of the second transistor is connected with the third end of the first transistor;
the first end of the capacitor is connected with the voltage signal end, and the second end of the capacitor is connected with the first end of the eighth transistor;
the second end of the third transistor is connected with the second end of the capacitor, and the third end of the third transistor is connected with the first end of the fifth transistor;
a second end of the fifth transistor is connected with the control signal end, and a third end of the fifth transistor is connected with the second light-emitting unit;
the first end of the control transistor is connected with the third end of the fifth transistor, the second end of the control transistor is connected with the third scanning line, and the third end of the control transistor is connected with the first light-emitting unit;
a first end of the fourth transistor is connected with a second end of the capacitor, a second end of the fourth transistor is connected with the second scanning line, and a third end of the fourth transistor is connected with a first end of the sixth transistor;
a second end of the sixth transistor is connected with the second scanning line, and a third end of the sixth transistor is connected with a first end of the fifth transistor;
a first end of the eighth transistor is connected with the second end of the capacitor, a second end of the eighth transistor is connected with the first scanning line, and a third end of the eighth transistor is connected with the first end of the seventh transistor;
the second end of the seventh transistor is connected with the first scanning line, and the third end of the seventh transistor is connected with the reference voltage end.
Wherein the drive circuit comprises a ninth transistor and a tenth transistor,
a first end of the ninth transistor is connected with the reference voltage end, a second end of the ninth transistor is connected with the first scanning line, and a third end of the ninth transistor is connected with a first end of the tenth transistor;
a second terminal of the tenth transistor is connected to the third scan line, and a third terminal of the tenth transistor is connected to the second light emitting unit.
Wherein the resolution of the regular display area and the light-transmitting display area are the same.
The first light-emitting unit and the second light-emitting unit are arranged in a spaced array.
The application also comprises a second technical scheme that: the display device comprises the display panel and the photosensitive element, wherein the display panel comprises a light-transmitting display area, and the photosensitive element is arranged on one side, close to the non-light-emitting surface, of the light-transmitting display area.
The beneficial effect of this application is: being different from the prior art, the application provides a display panel. The electrode that deviates from the display panel through the printing opacity display area and going out the plain noodles sets up printing opacity electrode and non-printing opacity electrode, can improve the transmittance of printing opacity display area to make the printing opacity display area can satisfy electronic component's demand, simultaneously, the normal luminance of printing opacity display area can be guaranteed to this application embodiment, improves the demonstration difference that the cockscomb structure appears between printing opacity display area and the conventional display area, shows evenly, the transition is natural, realizes the display panel full-scale screen display.
Drawings
FIG. 1 is a schematic plan view of a display panel according to an embodiment of the present invention;
FIG. 2 is a schematic view of a display panel according to the present application with a first light-emitting unit turned off;
FIG. 3 is a schematic view of the structure of FIG. 2 taken along line A-A;
FIG. 4 is a schematic diagram of a pixel circuit according to an embodiment of the present invention;
FIG. 5 is a timing diagram illustrating the operation of the pixel circuit of FIG. 4 when the photosensitive element is turned off;
FIG. 6 is a timing diagram illustrating the operation of the pixel circuit of FIG. 4 when the photosensitive element is in operation;
FIG. 7 is a schematic diagram of another embodiment of a pixel circuit according to the present application;
FIG. 8 is a timing diagram illustrating the operation of the pixel circuit of FIG. 7 when the photosensitive element is turned off;
fig. 9 is a corresponding timing diagram of the operation of the pixel circuit of fig. 7 when the photosensitive element is in operation.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application.
In order to realize a full screen display of the display panel, the display panel includes the light-transmissive display region 10 and the normal display region 30, so that both the light-transmissive display region 10 and the normal display region 30 have a display effect.
As shown in fig. 1 to fig. 3, an embodiment of the present application provides a display panel, which includes a transparent display area 10, the transparent display area 10 includes a plurality of first light emitting units 31 and a plurality of second light emitting units 32, the first light emitting units 31 include first electrodes 311 departing from a light emitting surface of the display panel, the second light emitting units 32 include second electrodes 321 departing from the light emitting surface of the display panel, wherein the first electrodes 311 are transparent electrodes, and the second electrodes 321 are non-transparent electrodes.
In the embodiment of the present application, through set up printing opacity electrode and non-printing opacity electrode at printing opacity display area 10, make can improve the transmittance of printing opacity display area 10, so that printing opacity display area 10 can satisfy electronic component's demand, simultaneously, the embodiment of the present application can not reduce the luminance of printing opacity display area 10, improve the demonstration influence that the cockscomb structure appears between printing opacity display area 10 and the conventional display area 30, make printing opacity display area 10 and the display area 30 of conventional show even, the transition nature.
In the embodiment of the present application, the light-transmissive display region 10 corresponds to a region where the photosensitive element 50 is located; when the photosensitive element 50 is operated, the first light-emitting unit 31 is turned off, and the second light-emitting unit 32 is operated; when the photosensitive element 50 is turned off, the first light emitting unit 31 and the second light emitting unit 32 operate simultaneously or are turned off simultaneously, i.e. in response to a display or non-display requirement of the display panel. In this embodiment, the transparent display area 10 may further correspond to place other electronic components under the screen, for example, may correspond to components such as a sensor, an earphone, a fingerprint module, and the like. The photosensitive element 50 in the embodiment of the present application may be a camera or the like.
In the embodiment of the present application, the first light emitting unit 31 having the first electrode 311 as a transparent electrode is disposed in the transparent display region 10, so as to improve the light transmittance of the transparent display region 10, and facilitate the light sensing element 50 to collect or sense the external ambient light through the transparent display region 10 of the display panel. When the first electrode 311 facing away from the light-emitting surface of the display panel is a transparent electrode, light emitted by the first light-emitting unit 31 can pass through the first electrode 311 to reach the photosensitive element 50 under the screen, and the photosensitive element 50 is influenced to collect external ambient light. When the second electrode 321 is a non-transparent electrode, the light emitted by the second light-emitting unit 32 reaches the second electrode 321 and is reflected, and the light cannot reach the photosensitive element 50 through the second electrode 321, which does not affect the photosensitive element 50 to collect the external ambient light. In the embodiment of the application, when the photosensitive element 50 works, the first light-emitting unit 31 is turned off, that is, the first light-emitting unit 31 does not emit light, so that light of the first light-emitting unit 31 cannot pass through the first electrode 311 to reach the photosensitive element 50, and the photosensitive element 50 cannot sense light emitted by the display panel or sense that light emitted by the display panel is very weak, which is negligible, so that the photosensitive element 50 in the light-transmitting display area 10 can normally collect or sense external ambient light, and normal work of the photosensitive element 50 cannot be influenced; according to the embodiment of the application, when the photosensitive element 50 is closed, the first light-emitting unit 31 and the second light-emitting unit 32 work simultaneously, so that the light-transmitting display area 10 of the display panel can display normally, the condition that the light-transmitting display area 10 displays darker light or the edge between the conventional display area 30 and the light-transmitting display area 10 is jagged when the display panel displays is improved, and the conventional display area 30 and the light-transmitting display area 10 of the display panel display uniformly; or the embodiment of the present application enables neither the normal display area 30 nor the light-transmissive display area 10 of the display panel to display by simultaneously turning off the first light-emitting unit 31 and the second light-emitting unit 32 when the photosensitive element 50 is turned off.
In the embodiment of the present application, the regular display area 30 includes a plurality of third light emitting units 33.
In the embodiment of the present application, the resolution ratio of conventional display area 30 and printing opacity display area 10 is the same, in the embodiment of the present application, the resolution ratio through setting up conventional display area 30 and printing opacity display area 10 is the same, can make display panel close at light sensing element 50, display panel can normally show, make conventional display area 30 and printing opacity display area 10 show evenly, and do not have the sawtooth between conventional display area 30 and the printing opacity display area 10, the transition is natural, avoid conventional display area 30 and printing opacity display area 10 saturation to appear the condition of difference.
In the embodiment of the present application, the first light emitting units 31 and the second light emitting units 32 are arranged in an array at intervals, so that the uniformity of the display in the light-transmitting display region 10 can be improved. The first electrode 311 of the first light-emitting unit 31 is a transparent electrode, and when the first light-emitting unit 31 emits light, the light emitted by the first light-emitting unit 31 can be transmitted through the first electrode 311, so that the light-emitting intensity of the first light-emitting unit 31 on the light-emitting surface of the display panel is slightly smaller than the light-emitting intensity of the second light-emitting unit 32 on the light-emitting surface of the display panel.
In the embodiment of the present application, both the first electrode 311 and the second electrode 321 of the display panel are anodes, in the embodiment of the present application, the first electrode 311 is a transparent electrode, the first electrode 311 is made of ITO, and the second electrode 321 is made of ITO/Ag/ITO, so that the second electrode 321 is a non-transparent electrode. In other embodiments, the transparent electrode may be made of other materials, and the non-transparent electrode may be made of other materials.
In the embodiment of the present application, the first light emitting unit 31 and the second light emitting unit 32 of the display panel further include an organic light emitting layer 81, a cathode layer 82, and the like, and the organic light emitting layer 81 is disposed between the anode layer and the cathode layer 82.
In the embodiment of the present application, the display panel further includes a pixel circuit as shown in fig. 4 and fig. 7, and the pixel circuit is at least used for controlling the first light emitting unit 31 to be turned off and driving the second light emitting unit 32 to emit light. In the embodiment of the present application, the display panel drives and controls the first light emitting unit 31 to turn off and the second light emitting unit 32 to emit light through the pixel circuit, so that the first light emitting unit 31 can be controlled to turn off and the second light emitting unit 32 can be controlled to emit light in time sequence, and the light emission of the first light emitting unit 31 is turned off in response to the operation of the photosensitive element 50. The pixel circuit in the embodiment of the present application is further configured to control the third light emitting unit of the normal display area 30 to operate, so as to control the normal display area 30 and the light-transmitting display area 10 of the display panel to emit light.
In the embodiment of the present application, as shown in fig. 3, the display panel further includes a substrate 80, the pixel circuit is disposed on the substrate 80 and forms an array substrate with the substrate 80, the third light-emitting unit and the first light-emitting unit 31, and the second light-emitting unit 32 and the third light-emitting unit 33 are disposed on the array substrate, the display panel further includes an encapsulation layer 83 covering the first light-emitting unit 31, the second light-emitting unit 32 and the third light-emitting unit 33, and the encapsulation layer 83 includes an inorganic thin film encapsulation layer and an organic thin film encapsulation layer which are stacked. The specific structure of the light-emitting display layer is not particularly limited in this application, and may be set according to the display mode of the display panel.
In the embodiment of the present application, as shown in fig. 3, the pixel circuit is disposed in the regular display area 30. By disposing the pixel circuits in the regular display region 30, the pixel circuits can be prevented from blocking the photosensitive elements 50 of the transparent display region 10, and the light transmittance of the transparent display region 10 can be improved.
In the embodiment of the present application, the pixel circuit includes the transistor 60, and specifically, the transistor 60 is disposed in the conventional display area 30, so that the transistor 60 is prevented from being disposed in the transparent display area 10 to shield the photosensitive element 50, and the light transmittance of the transparent display area 10 is improved.
In this embodiment, the pixel circuit includes a trace, wherein the trace respectively connected to the first electrode 311 and the second electrode 321 is a transparent trace 70. Specifically, in the embodiment of the present application, as shown in fig. 3, the source of the transistor 60 is connected to the first electrode 311 and the second electrode 321 through the transparent trace 70; in other embodiments, the drain of the transistor 60 may be connected to the first electrode 311 and the second electrode 321 through the transparent trace 70; or the pixel circuit includes a capacitor, the trace of the connection between one end of the capacitor and the first electrode 311 is a transparent trace 70, and the trace of the connection between one end of the capacitor and the second electrode 312 is a transparent trace 70. In the embodiment of the present application, the trace connected to the first electrode 311 and the second electrode 321 in the pixel circuit is set as the transparent trace 70, so that the shielding of the trace on the photosensitive element 50 under the screen of the light-transmitting display area 10 can be avoided.
In one embodiment of the present application, the pixel circuit includes two pixel circuits, namely, a first pixel circuit (not shown) and a second pixel circuit (not shown); the first pixel circuit is connected to a first driving chip (not shown) for controlling the first light emitting unit 31 to turn off or emit light; the second pixel circuit is connected to a second driving chip (not shown) for controlling the second light emitting unit 32 and the third light emitting unit to turn off or emit light. The first and second light emitting units 31 and 32 may be controlled by two pixel circuits, respectively.
In another embodiment of the present application, the light-transmitting display region 10 transmits light, in the embodiment of the present application, the pixel circuit includes a control module, the control module is connected to the first light-emitting unit 31, the control module is in an off state in the working stage of the photosensitive element 50, and the first light-emitting unit 31 is turned off. In the embodiment of the present application, one pixel circuit is provided, and in the embodiment of the present application, a control module is provided, so that the pixel circuit can control, through the control module, the first light emitting unit 31 to be in an off state when the photosensitive element 50 is in a working stage, for example, when the image capturing device is in a shooting state, and the first light emitting unit 31 is not turned on, so that the first light emitting unit 31 is turned off; the embodiment of the application can realize the independent control of the first light-emitting unit 31 by providing the control module, for example, when the photosensitive element 50 is in the off stage, for example, when the image pickup apparatus is not started, the control module is in the on state, and the first light-emitting unit 31 is on, so that the first light-emitting unit 31 operates.
Specifically, in the embodiment of the present application, the control module includes a control transistor. In other embodiments, the control module may be a control circuit configured to control a transistor, a capacitor, and the like.
In the embodiment of the present application, a first end of the control transistor is connected to the scan line, and a second end of the control transistor is connected to the first light emitting unit 31, and is configured to turn off the first light emitting unit 31 when an amplitude of a scan signal output by the scan line falls within a first preset voltage range; the pixel circuit further includes a driving circuit connected to the second light emitting unit 32 for driving the second light emitting unit 32 to operate when the amplitude of the signal output by the driving circuit falls within a second preset voltage range.
In the embodiment of the present application, the first preset voltage range is a voltage range in which the transistor is controlled to be in an off state; in the embodiment of the present application, the second preset voltage range is a voltage range in which the driving circuit can drive the second light emitting unit 32 to operate.
In the embodiment of the present application, the control transistor is connected to the scan line, the scan line outputs the scan signal to the control transistor, and when the voltage amplitude of the output scan signal is within the first preset voltage range, the control transistor is in an off state, and the first light emitting unit 31 is turned off.
The driving circuit in the embodiment of the present application may be a 2T1C or 3T1C or T1C, 4T2C, 5T1C, 6T1C or 7T1C circuit, etc.
Fig. 4, 5 and 6 are circuit diagrams of pixel circuits of a display panel according to an embodiment of the invention and corresponding operation timing diagrams. Wherein drive circuit is 6T1C circuit, and drive circuit includes: the pixel circuit comprises a first transistor M1, a second transistor M2, a third transistor M3, a fourth transistor M4, a fifth transistor M5, a sixth transistor M6, a seventh transistor M7, an eighth transistor M8 and a storage capacitor C1, and the pixel circuit comprises a control transistor M11.
As shown in fig. 4, the first terminal of the first transistor M1 and the data signal terminal V DATA A second terminal of the first transistor M1 is connected to the second Scan line Scan2, and a third terminal of the first transistor M1 is connected to the first terminal of the third transistor M3;
the first terminal of the second transistor M2 and the voltage signal terminal V DD A second terminal of the second transistor M2 is connected to the control signal terminal EM, and a third terminal of the second transistor M2 is connected to the third terminal of the first transistor M1;
the first terminal of the storage capacitor C1 and the voltage signal terminal V DD A second terminal of the storage capacitor C1 is connected to a first terminal of the eighth transistor M8;
a second terminal of the third transistor M3 is connected to the second terminal of the storage capacitor C1, and a third terminal of the third transistor M3 is connected to the first terminal of the fifth transistor M5;
a second terminal of the fifth transistor M5 is connected to the control signal terminal EM, and a third terminal of the fifth transistor M5 is connected to the second light emitting unit 32;
a first terminal of the control transistor M11 is connected to the third terminal of the fifth transistor M5, a second terminal of the control transistor M11 is connected to the third Scan line Scan3, and a third terminal of the control transistor M11 is connected to the first light emitting unit 31;
a first end of the fourth transistor M4 is connected to the second end of the storage capacitor C1, a second end of the fourth transistor M4 is connected to the second Scan line Scan2, and a third end of the fourth transistor M4 is connected to a first end of the sixth transistor M6;
a second terminal of the sixth transistor M6 is connected to the second Scan line Scan2, and a third terminal of the sixth transistor M6 is connected to the first terminal of the fifth transistor M5;
a first end of the eighth transistor M8 is connected to the second end of the storage capacitor C1, a second end of the eighth transistor M8 is connected to the first Scan line Scan1, and a third end of the eighth transistor M8 is connected to a first end of the seventh transistor M7;
the second terminal of the seventh transistor M7 is connected to the first Scan line Scan1, and the third terminal of the seventh transistor M7 is connected to the reference voltage terminal V REF And (4) connecting.
In the embodiment of the present application, the control transistor M11 is a PMOS transistor, and the first transistor M1, the second transistor M2, the third transistor M3, the fourth transistor M4, the fifth transistor M5, the sixth transistor M6, the seventh transistor M7, and the eighth transistor M8 are also PMOS transistors. In the embodiment of the present application, the first terminal is a drain, the second terminal is a gate, and the third terminal is a source.
As shown in fig. 5, the corresponding operation timing diagram of the pixel circuit of the display panel when the photosensitive element 50 (see fig. 3) is turned off can be seen from fig. 5, in the read/write phase: when the control signal terminal EM and the third Scan line Scan3 output voltage signals of a low level, the fifth transistor M5 and the control transistor M11 are in a conductive state, and the first light emitting unit 31 and the second light emitting unit 32 operate. As shown in the corresponding operation timing diagram of the pixel circuit of the display panel when the light sensing element 50 operates in fig. 6, it can be seen from fig. 6 that when the control signal terminal EM outputs a low-level voltage signal and the third Scan line Scan3 outputs a high-level voltage signal, the fifth transistor M5 is turned on, the control transistor M11 is in an off state, and the first light emitting unit 31 is turned off and is in an off state, and the second light emitting unit 32 is turned on and is in an operating state. In the embodiment of the present application, the first light emitting unit 31 can be controlled to be turned off and operated by one pixel circuit, so that when the image sensing element 50 operates, the first light emitting unit 31 is turned off, and the operation of the image sensing element 50 is not affected; when the photosensitive element 50 is turned off, the first light-emitting unit 31 and the second light-emitting unit 32 operate, so that the display of the conventional display area 30 and the transparent display area 10 is uniform, and the display effect is improved.
In another embodiment of the present application, as shown in fig. 7, the pixel circuit diagram, wherein the driving circuit is a 7T1C circuit, the driving circuit includes: the pixel circuit comprises a first transistor M1, a second transistor M2, a third transistor M3, a fourth transistor M4, a fifth transistor M5, a sixth transistor M6, a seventh transistor M7, an eighth transistor M8, a ninth transistor M9 and a storage capacitor C1, wherein the pixel circuit comprises the control transistor M11, and in the embodiment of the application, the transistors further comprise a 10 th transistor M10.
The first transistor M1-the eighth transistor M8 and the storage capacitor C1 are connected in the same manner as the previous embodiments, and are not described herein again.
A first terminal of the control transistor M11 is connected to the third terminal of the fifth transistor M5, a second terminal of the control transistor M11 is connected to the third Scan line Scan3, and a third terminal of the control transistor M11 is connected to the first light emitting unit 31;
the first terminal of the ninth transistor M9 and the reference voltage terminal V REF A second terminal of the ninth transistor M9 is connected to the first Scan line Scan1, and a third terminal of the ninth transistor M9 is connected to the first terminal of the tenth transistor M10;
a second terminal of the tenth transistor M10 is connected to the third Scan line Scan3, and a third terminal of the tenth transistor M10 is connected to the second light emitting unit 32.
In the embodiment of the present application, the control transistor M11 is a PMOS transistor, and the first transistor M1, the second transistor M2, the third transistor M3, the fourth transistor M4, the fifth transistor M5, the sixth transistor M6, the seventh transistor M7, the eighth transistor M8, the ninth transistor M9, and the tenth transistor M10 are also PMOS transistors. In the embodiment of the present application, the first terminal is a drain, the second terminal is a gate, and the third terminal is a source.
As shown in the corresponding operation timing diagram of the pixel circuit of the display panel when the light sensing element 50 (see fig. 3) is turned off in fig. 8, it can be seen from fig. 8 that when the control signal terminal EM and the third Scan line Scan3 output a voltage signal of a low level, the fifth transistor M5 and the control transistor M11 are in a turned-on state, and the first light emitting unit 31 and the second light emitting unit 32 operate. As shown in the corresponding operation timing diagram of the pixel circuit of the display panel when the light sensing element 50 operates as shown in fig. 9, it can be seen from fig. 8 that when the control signal terminal EM outputs a low-level voltage signal and the third Scan line Scan3 outputs a high-level voltage signal, the fifth transistor M5 is turned on, the control transistor M11 is in an off state, so that the first light emitting unit 31 is turned off and is in an off state, and the second light emitting unit 32 is turned on and is in an operating state. In the embodiment of the present application, the first light emitting unit 31 can be controlled to be turned off and operated by one pixel circuit, so that when the image sensing element 50 operates, the first light emitting unit 31 is turned off, and the operation of the image sensing element 50 is not affected; when the photosensitive element 50 is turned off, the first light emitting unit 31 and the second light emitting unit 32 operate, so that the display of the conventional display area 30 and the transparent display area 10 is uniform, and the display effect is improved.
In the above embodiment, the driving circuit of the pixel circuit is a 7T1C circuit, the transistor 60 of the pixel circuit includes the tenth transistor M10 and the control transistor M11, and in other embodiments, the tenth transistor M10 may not be provided, and the third terminal of the ninth transistor M9 is directly connected to the third terminal of the fifth transistor M5. In other embodiments, the driving circuit may be other types of driving circuits. In the embodiment of the present application, the transistor 60 is only a PMOS transistor, and in other embodiments, the transistor 60 may also be an NMOS transistor.
The application also comprises a second technical scheme that: a display device is provided, as shown in fig. 3, which includes the display panel and the photosensitive element 50, the display panel includes a transparent display area 30, and the photosensitive element 50 is disposed on a side of the transparent display area 30 close to the non-light-emitting surface. The display device of the embodiment of the application sets up printing opacity electrode and non-printing opacity electrode through the printing opacity display area 10 at display panel, can improve the transmittance of printing opacity display area 10, so that printing opacity display area 10 can satisfy sensitization element 50's demand, and simultaneously, the embodiment of the application can not reduce the luminous luminance of printing opacity display area 10, improve the condition that the zigzag display effect appears in printing opacity display area 10 demonstration and the demonstration of conventional display area 30, make printing opacity display area 10 and conventional display area 30 show evenly, the transition is natural.
The above description is only for the purpose of illustrating embodiments of the present application and is not intended to limit the scope of the present application, and all modifications of equivalent structures and equivalent processes, which are made by the contents of the specification and the drawings of the present application or are directly or indirectly applied to other related technical fields, are also included in the scope of the present application.

Claims (10)

1. A display panel, comprising:
the display panel comprises a light-transmitting display area, a first light-emitting unit and a second light-emitting unit, wherein the light-transmitting display area comprises the first light-emitting unit and the second light-emitting unit, the first light-emitting unit comprises a first electrode deviating from a light-emitting surface of the display panel, the second light-emitting unit comprises a second electrode deviating from the light-emitting surface of the display panel, the first electrode is a light-transmitting electrode, the second electrode is a non-light-transmitting electrode, and the second electrode reflects light emitted by the second light-emitting unit;
the side, close to the non-light-emitting surface, of the light-transmitting display area is correspondingly provided with a photosensitive element; when the photosensitive element works, the first light-emitting unit is closed, and the second light-emitting unit works;
the pixel circuit is arranged in the normal display area and at least used for controlling the first light-emitting unit to be closed and driving the second light-emitting unit to work to emit light.
2. The display panel according to claim 1,
when the photosensitive element is closed, the first light-emitting unit and the second light-emitting unit work simultaneously or are closed simultaneously.
3. The display panel according to claim 1, wherein a light transmittance of the normal display region is smaller than a light transmittance of the light-transmitting display region.
4. The display panel according to claim 1, wherein the pixel circuit comprises traces, and wherein the traces respectively connected to the first electrode and the second electrode are transparent traces.
5. The display panel according to claim 1, wherein the pixel circuit comprises a control module, the control module is connected to the first light emitting unit, the control module is in an off state during the operation stage of the photosensitive element, and the first light emitting unit is turned off.
6. The display panel according to claim 5,
the control module includes a control transistor.
7. The display panel according to claim 6, wherein a first terminal of the control transistor is connected to a scan line, and a second terminal of the control transistor is connected to the first light emitting unit, for turning off the first light emitting unit when an amplitude of a scan signal output from the scan line falls within a first preset voltage range;
the pixel circuit further comprises a driving circuit, wherein the driving circuit is connected with the second light-emitting unit and used for driving the second light-emitting unit to work when the amplitude of the signal output by the driving circuit is within a second preset voltage range.
8. The display panel according to claim 7, wherein the driver circuit comprises a first transistor, a second transistor, a third transistor, a fourth transistor, a fifth transistor, a sixth transistor, a seventh transistor, an eighth transistor, and a storage capacitor;
a first end of the first transistor is connected with a data signal end, a second end of the first transistor is connected with a second scanning line, and a third end of the first transistor is connected with a first end of the third transistor;
a first end of the second transistor is connected with a voltage signal end, a second end of the second transistor is connected with a control signal end, and a third end of the second transistor is connected with a third end of the first transistor;
the first end of the capacitor is connected with the voltage signal end, and the second end of the capacitor is connected with the first end of the eighth transistor;
a second end of the third transistor is connected with a second end of the capacitor, and a third end of the third transistor is connected with a first end of the fifth transistor;
a second end of the fifth transistor is connected with the control signal end, and a third end of the fifth transistor is connected with the second light-emitting unit;
a first end of the control transistor is connected with a third end of the fifth transistor, a second end of the control transistor is connected with a third scanning line, and a third end of the control transistor is connected with the first light-emitting unit;
a first end of the fourth transistor is connected with a second end of the capacitor, a second end of the fourth transistor is connected with the second scanning line, and a third end of the fourth transistor is connected with a first end of the sixth transistor;
a second end of the sixth transistor is connected with the second scanning line, and a third end of the sixth transistor is connected with a first end of the fifth transistor;
a first end of the eighth transistor is connected with a second end of the capacitor, a second end of the eighth transistor is connected with the first scan line, and a third end of the eighth transistor is connected with a first end of the seventh transistor;
a second terminal of the seventh transistor is connected to the first scan line, and a third terminal of the seventh transistor is connected to a reference voltage terminal.
9. The display panel according to claim 7, wherein the driver circuit comprises a ninth transistor and a tenth transistor,
a first end of the ninth transistor is connected with the reference voltage end, a second end of the ninth transistor is connected with the first scanning line, and a third end of the ninth transistor is connected with a first end of the tenth transistor;
a second terminal of the tenth transistor is connected to a third scan line, and a third terminal of the tenth transistor is connected to the second light emitting unit.
10. A display device, comprising the display panel according to any one of claims 1 to 9 and a photosensitive element, wherein the display panel comprises a light-transmissive display region, and the photosensitive element is disposed on a side of the light-transmissive display region close to the non-light-emitting surface.
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CN210052743U (en) * 2019-06-28 2020-02-11 昆山国显光电有限公司 Display substrate, display panel and display device
CN110275342A (en) * 2019-07-04 2019-09-24 惠州市华星光电技术有限公司 Display panel and electronic equipment
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