CN111462695A - Display panel, first pixel circuit and display device - Google Patents
Display panel, first pixel circuit and display device Download PDFInfo
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- CN111462695A CN111462695A CN202010321312.8A CN202010321312A CN111462695A CN 111462695 A CN111462695 A CN 111462695A CN 202010321312 A CN202010321312 A CN 202010321312A CN 111462695 A CN111462695 A CN 111462695A
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
- G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
- G09G3/3225—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix
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- 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
- H10K59/131—Interconnections, e.g. wiring lines or terminals
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- 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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Abstract
The invention discloses a display panel, a first pixel circuit and a display device. The display panel is provided with a first display area and a second display area, the light transmittance of the first display area is greater than that of the second display area, and the display panel comprises a first pixel circuit which is electrically connected with a first sub-pixel of the first display area; a plurality of light emission control signal lines extending in a first direction and spaced apart from each other in a second direction intersecting the first direction; at least part of the light-emitting control signal lines are electrically connected with the first pixel circuit through the first switch module. According to the display panel provided by the embodiment of the invention, the purpose of saving power consumption can be achieved.
Description
Technical Field
The invention relates to the field of display, in particular to a display panel, a first pixel circuit, a display panel comprising the first pixel circuit and a display device.
Background
With the rapid development of electronic devices, the requirements of users on screen occupation ratio are higher and higher, so that the comprehensive screen display of the electronic devices is concerned more and more in the industry.
Conventional electronic devices such as mobile phones, tablet computers, etc. need to integrate components such as front-facing cameras, earphones, infrared sensing elements, etc. In the prior art, a groove (Notch) or an opening may be formed in the display screen, and external light may enter the photosensitive element located below the screen through the groove or the opening. However, these electronic devices are not all full-screen in the true sense, and cannot display in each area of the whole screen, for example, the corresponding area of the front camera cannot display the picture.
Disclosure of Invention
The embodiment of the invention provides a display panel, a first pixel circuit, a display panel comprising the first pixel circuit and a display device, which realize that at least part of the area of the display panel is light-permeable and can display, and are convenient for the under-screen integration of a photosensitive assembly.
In a first aspect, an embodiment of the present invention provides a display panel, which has a first display area and a second display area, wherein a light transmittance of the first display area is greater than a light transmittance of the second display area, and the display panel includes:
the first pixel circuit is electrically connected with the first sub-pixel of the first display area;
a plurality of light emission control signal lines extending in a first direction and spaced apart from each other in a second direction intersecting the first direction;
at least part of the light-emitting control signal lines are electrically connected with the first pixel circuit through the first switch module.
In a possible implementation manner of the first aspect, the first switch module includes a first switch element and a second switch element, and the display panel further includes a first control signal line, a second control signal line, and an off-voltage signal line;
a first end of the first switch element is electrically connected with the light-emitting control signal line, a control end of the first switch element is electrically connected with the first control signal line, and a second end of the first switch element is electrically connected with the first pixel circuit;
the first end of the second switch element is electrically connected with the cut-off voltage signal line, the control end of the second switch element is electrically connected with the second control signal line, and the second end of the second switch element is electrically connected with the first pixel circuit.
In a possible implementation manner of the first aspect, the plurality of data lines of the display panel extend along the second direction and are distributed at intervals in the first direction, and at least a portion of the data lines are electrically connected to the first pixel circuits through the second switch module.
In one possible implementation manner of the first aspect, the second switch module includes a third switch element, a first end of the third switch element is electrically connected to the data line, a control end of the third switch element is electrically connected to the first control signal line, and a second end of the third switch element is electrically connected to the first pixel circuit.
In one possible implementation manner of the first aspect, the first switching element, the second switching element, and the third switching element are all thin film transistors.
In a possible implementation manner of the first aspect, the second pixel circuit of the display panel is electrically connected to the second sub-pixel of the second display area, and the first pixel circuit, the second pixel circuit and the light emission control signal line are all disposed in the second display area;
the light-emitting control signal lines comprise first light-emitting control signal lines and second light-emitting control signal lines, the first light-emitting control signal lines are located on two sides of the first display area in the first direction, the first light-emitting control signal lines are electrically connected with the corresponding first pixel circuits and the corresponding second pixel circuits, and the second light-emitting control signal lines are electrically connected with the corresponding second pixel circuits.
In a second aspect, an embodiment of the present invention provides a first pixel circuit for driving a first sub-pixel of a first display region of a display panel, the display panel further including a second display region, a light transmittance of the first display region being greater than a light transmittance of the second display region, the first pixel circuit including: the device comprises a data writing module, a driving module, a light emitting control module, a light emitting module and a first switch module;
the data writing module is electrically connected with the data line, the scanning line and the driving module and is used for writing data voltage into the driving module;
the driving module is used for outputting a driving signal according to the data voltage;
the light-emitting control module is electrically connected with the driving module and the light-emitting module and is electrically connected with the light-emitting control signal line through the first switch module, and the light-emitting control module responds to the light-emitting control signal on the light-emitting control signal line to control the driving signal to be output to the light-emitting module and control the light-emitting module to emit light.
In a possible implementation manner of the second aspect, the data writing module is electrically connected to the data line through the second switch module, or the data writing module is electrically connected to the driving module through the second switch module.
In a third aspect, an embodiment of the present invention provides a display panel, including the first pixel circuit as in any one of the embodiments of the second aspect, the display panel has a first display area and a second display area, the light transmittance of the first display area is greater than that of the second display area, and the first pixel circuit is electrically connected to the first sub-pixel of the first display area.
In a fourth aspect, an embodiment of the present invention provides a display device, including the display panel according to any one of the first aspect, or including the display panel according to any one of the third aspect.
According to the display panel provided by the embodiment of the invention, the light transmittance of the first display area is greater than that of the second display area, so that the display panel can integrate the photosensitive assembly on the back surface of the first display area, the screen-under integration of the photosensitive assembly such as a camera is realized, meanwhile, the first display area can display pictures, the display area of the display panel is increased, and the comprehensive screen design of the display device is realized.
According to the display panel of the embodiment of the invention, the first pixel circuit is electrically connected with the first sub-pixel of the first display area, the plurality of light-emitting control signal lines extend along the first direction and are distributed at intervals in the second direction intersecting the first direction, and at least part of the light-emitting control signal lines are electrically connected with the first pixel circuit through the first switch module. At least part of the light-emitting control signal lines are not directly electrically connected with the first pixel circuit any more, but are electrically connected with the first pixel circuit through the first switch module, so that whether the light-emitting control signals on the light-emitting control signal lines can be transmitted to the first pixel circuit or not can be controlled by controlling the state of the first switch module. For example, in the photographing mode, the first switch module may be in an off state, the light-emitting control signal on the light-emitting control signal line cannot be transmitted to the first pixel circuit, and the sub-pixels of the first display area do not emit light, so that the first display area is in a transparent state, thereby avoiding affecting the photographing effect. On one hand, the light-emitting control signal on the light-emitting control signal line cannot be transmitted to the first pixel circuit, so that the leakage current caused by poor turn-off performance of some switching tubes in the first pixel circuit can be prevented from flowing to the first sub-pixel, and the first sub-pixel is prevented from generating weak light in a photographing mode to influence the photographing effect; on the other hand, the first display area can be in a transparent state directly by controlling the state of the first switch module, and the first display area does not need to be in the transparent state by providing a higher data voltage signal for the first pixel circuit, so that the power consumption can be reduced.
Drawings
Other features, objects and advantages of the invention will become apparent from the following detailed description of non-limiting embodiments thereof, when read in conjunction with the accompanying drawings, in which like reference characters designate the same or similar parts throughout the figures thereof, and which are not to scale.
FIG. 1 illustrates a schematic top view of a display panel provided in accordance with an embodiment of the invention;
fig. 2 is a schematic diagram illustrating a first pixel circuit according to an embodiment of the present invention;
FIG. 3 illustrates an enlarged schematic view of the Q region of FIG. 1 provided in accordance with one embodiment of the present invention;
fig. 4 is a schematic structural diagram of a first pixel circuit according to still another embodiment of the present invention;
fig. 5 is a schematic structural diagram of a first pixel circuit provided in accordance with yet another embodiment of the present invention;
fig. 6 is a schematic structural diagram of a first pixel circuit provided in accordance with yet another embodiment of the present invention;
FIG. 7 illustrates a schematic top view of a display panel provided in accordance with yet another embodiment of the present invention;
FIG. 8 illustrates a schematic top view of a display device provided in accordance with an embodiment of the invention;
fig. 9 shows a cross-sectional view a-a in fig. 8, provided as an example.
Description of reference numerals:
100. 200-a display panel;
AA 1-first display area; AA 2-second display area; NA-non-display area;
x-a first direction; y-a second direction;
11. 13-a first pixel circuit; 12. 14-a second pixel circuit;
20-a light emission control signal line; 21-a first lighting control signal line; 22-a second light emission control signal line;
30-a data line;
41-first signal control line; 42-second signal control line; 43-cut-off voltage signal line;
50-a first switch module; 51-a first switching element; 52-a second switching element;
60-a second switch module; 61-a third switching element;
71-a data write module; 72-a drive module; 73-a light emission control module; 74-a light emitting module;
300-photosensitive component.
Detailed Description
Features and exemplary embodiments of various aspects of the present invention will be described in detail below, and in order to make objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not to be construed as limiting the invention. It will be apparent to one skilled in the art that the present invention may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the present invention by illustrating examples of the present invention.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
It will be understood that when a layer, region or layer is referred to as being "on" or "over" another layer, region or layer in describing the structure of the component, it can be directly on the other layer, region or layer or intervening layers or regions may also be present. Also, if the component is turned over, one layer or region may be "under" or "beneath" another layer or region.
On electronic devices such as mobile phones and tablet computers, it is necessary to integrate a photosensitive component such as a front camera, an infrared light sensor, a proximity light sensor, and the like on the side where the display panel is provided. In some embodiments, a transparent display area may be disposed on the electronic device, and the photosensitive component is disposed on the back of the transparent display area, so that full-screen display of the electronic device is achieved under the condition that the photosensitive component is ensured to work normally.
In order to make the transparent display region transparent in the photographing mode, a higher data voltage is usually provided to the pixel circuit corresponding to the transparent display region, which requires higher power consumption. In addition, the data voltage on the data line is too high or the turn-off performance of the switching tube of the data writing module of the pixel circuit corresponding to the light-transmitting display area is not good, so that the pixel circuit corresponding to the light-transmitting display area has a leakage current phenomenon, and a part of leakage current flows into the sub-pixels of the light-transmitting display area, so that the light-transmitting display area still has weak light emission or a residual image phenomenon in a photographing mode, and the photographing effect is influenced.
In order to solve the above problems, embodiments of the present invention provide a display panel, a first pixel circuit, a display panel including the first pixel circuit, and a display device, and the display panel, the first pixel circuit, a driving method of the display panel, and the display device will be described below with reference to the accompanying drawings.
Embodiments of the present invention provide a display panel, which may be an Organic light Emitting Diode (O L ED) display panel.
Fig. 1 illustrates a schematic top view of a display panel provided according to an embodiment of the present invention. In the drawings of the present application, in order to clearly show the connection relationship between the signal lines and the pixel circuits, other film layers are shown in a hidden manner.
As shown in fig. 1, the display panel 100 has a first display area AA1, a second display area AA2, and a non-display area NA surrounding the first display area AA1 and the second display area AA2, and the light transmittance of the first display area AA1 is greater than that of the second display area AA 2. Second display area AA2 may partially surround or completely surround first display area AA 1.
Herein, it is preferable that the light transmittance of the first display area AA1 is 15% or more. To ensure that the light transmittance of the first display area AA1 is greater than 15%, even greater than 40%, or even higher, the light transmittance of at least some functional film layers of the display panel 100 in this embodiment is greater than 80%, or even greater than 90%.
According to the display panel 100 of the embodiment of the invention, the light transmittance of the first display area AA1 is greater than that of the second display area AA2, so that the display panel 100 can integrate a photosensitive component on the back of the first display area AA1, and realize the under-screen integration of the photosensitive component such as a camera, and meanwhile, the first display area AA1 can display a picture, so that the display area of the display panel 100 is increased, and the full-screen design of the display device is realized.
As shown in fig. 1, the display panel 100 of the embodiment of the invention includes a first pixel circuit 11 and a light emitting control signal line 20. The first pixel circuit 11 is electrically connected to a first sub-pixel (not shown) of the first display area AA 1. The first pixel circuit 11 is used for driving the first sub-pixel of the first display area AA1 to emit light. The plurality of light emission control signal lines 20 extend in the first direction X and are spaced apart in a second direction Y intersecting the first direction X. The first direction X may be perpendicular to the second direction Y. The first direction X may be a row direction and the second direction Y may be a column direction. At least a part of the light emitting control signal lines 20 are electrically connected to the first pixel circuits 11 through the first switch module 50.
In some embodiments, the circuit structure of the first pixel circuit 11 may be any one of a 3T1C circuit, a 6T1C circuit, a 6T2C circuit, a 7T1C circuit, a 7T2C circuit, or a 9T1C circuit. Herein, the "3T 1C circuit" refers to a pixel circuit including 3 thin film transistors (T) and 1 capacitor (C) in the pixel circuit, and the other "7T 1C circuit", "7T 2C circuit", "9T 1C circuit", and the like are analogized.
In order to better understand the function of the first switch module 50 provided in the embodiment of the present invention, as shown in fig. 2, a circuit structure of 7T1C of the first pixel circuit 11 is provided in the embodiment of the present invention, as shown in fig. 2, the first pixel circuit 11 includes a first transistor T1, a second transistor T2, a third transistor T3, a fourth transistor T4, a fifth transistor T5, a sixth transistor T6, a seventh transistor T7, a capacitor Cst, and organic light emitting diodes O L ED., the transistors T1 to T7 respectively have a control terminal, a first terminal, and a second terminal, and the organic light emitting diodes O L ED may be a first sub-pixel of the first display area AA 1.
As shown in fig. 2, a first terminal of the second transistor T2 is electrically connected to the data signal (Vdata) input terminal, a control terminal of the second transistor T2 is electrically connected to the second Scan signal (Scan2) input terminal, and a second terminal of the second transistor T2 is electrically connected to a first terminal of the first transistor T1 and a second terminal of the fifth transistor T5.
The first transistor T1 is a driving transistor, a first terminal of the first transistor T1 is electrically connected to the second terminal of the second transistor T2 and the second terminal of the fifth transistor T5, a second terminal of the first transistor T1 is electrically connected to the first terminal of the sixth transistor T6, and a control terminal of the first transistor T1 is electrically connected to the first terminal of the third transistor T3, the first terminal of the fourth transistor T4, and the second terminal of the capacitor Cst.
A first terminal of the third transistor T3 is electrically connected to the first terminal of the fourth transistor T4, the control terminal of the first transistor T1, and the second terminal of the capacitor Cst, a control terminal of the third transistor T3 is electrically connected to the second Scan signal (Scan2) input terminal, and a second terminal of the third transistor T3 is electrically connected to the second terminal of the first transistor T1 and the first terminal of the sixth transistor T6.
A first terminal of the fourth transistor T4 is electrically connected to the first terminal of the third transistor T3, the control terminal of the first transistor T1, and the second terminal of the capacitor Cst, a control terminal of the fourth transistor T4 is electrically connected to the first Scan signal (Scan1) input terminal, and a second terminal of the fourth transistor T4 is electrically connected to the reference signal (Vref) input terminal.
A first terminal of the fifth transistor T5 is electrically connected to the first power signal (E L VDD) input terminal and the first pole of the capacitor Cst, a control terminal of the fifth transistor T5 is electrically connected to the emission control signal (EM) input terminal, and a second terminal of the fifth transistor T5 is electrically connected to the first terminal of the first transistor T1 and the second terminal of the second transistor T2.
A first terminal of the sixth transistor T6 is electrically connected to the second terminal of the first transistor T1 and the second terminal of the third transistor T3, a control terminal of the sixth transistor T6 is electrically connected to an emission control signal (EM) input terminal, and a second terminal of the sixth transistor T6 is electrically connected to the second terminal of the seventh transistor T7 and an anode of the organic light emitting diode O L ED.
A first terminal of the seventh transistor T7 is electrically connected to the reference signal (Vref) input terminal and the second terminal of the fourth transistor T4, a control terminal of the seventh transistor T7 is electrically connected to the third Scan signal (Scan1) input terminal, and a second terminal of the seventh transistor T7 is electrically connected to the anode of the organic light emitting diode O L ED and the second terminal of the sixth transistor T6.
The cathode of the organic light emitting diode O L ED is electrically connected to the second power signal (E L VSS) input terminal.
If the first switch module 50 is not disposed between the light-emitting control signal line 20 and the first pixel circuit 11, in the photo mode, it is required that the data signal (Vdata) input terminal provides a higher data voltage (e.g. 6.5V) to make the first sub-pixel of the first display area AA1 not emit light, the data voltage provided by the data signal (Vdata) input terminal is higher, or the threshold voltage Vth of the second transistor T2 is biased positively, which results in poor turn-off of the second transistor T2, and further results in three leakage paths in the first pixel circuit 11, as shown in fig. 2, the first path is a leakage current flowing to the first power signal (E L VDD) input terminal, the second path is a leakage current flowing to the control terminal of the first transistor T1, the third path is a leakage current flowing to the second power signal (E L VSS) input terminal, and the potential of the second power signal (E L VSS) input terminal is lower than the first power signal (E L) input terminal and the control terminal of the first transistor T2, so that most of the second power signal (E L VSS) input terminal still has a weak light-emitting effect, thereby causing the first pixel circuit 23 to display a weak photo mode.
In the display panel 100 according to the embodiment of the invention, the first pixel circuit 11 is electrically connected to the first sub-pixel of the first display area AA1, the plurality of light-emitting control signal lines 20 extend along the first direction X and are distributed at intervals in the second direction Y intersecting the first direction X, and at least a portion of the light-emitting control signal lines 20 are electrically connected to the first pixel circuit 11 through the first switch module 50. At least a portion of the emission control signal line 20 is not directly electrically connected to the first pixel circuit 11, but is electrically connected to the first pixel circuit 11 through the first switching block 50, so that whether the emission control signal (EM) on the emission control signal line 20 can be transmitted to the first pixel circuit 11 can be controlled by controlling the on-off state of the first switching block 50. For example, in the photographing mode, the first switch module 50 may be in an off state, and the light-emitting control signal (EM) on the light-emitting control signal line 20 cannot be transmitted to the first pixel circuit 11, so that the first sub-pixel of the first display area AA1 does not emit light, and the first display area AA1 may be in a transparent state, thereby avoiding affecting the photographing effect. In the non-photographing mode, the first switch module 50 may be in a conducting state, and the light-emitting control signal (EM) on the light-emitting control signal line 20 is normally transmitted to the first pixel circuit 11, so that the first sub-pixel of the first display area AA1 normally emits light, and the influence on the normal display of the first display area AA1 is avoided.
According to the embodiment of the invention, on one hand, the light-emitting control signal (EM) on the light-emitting control signal line 20 cannot be transmitted to the first pixel circuit 11, which can prevent the leakage current caused by the poor turn-off of some switching tubes in the first pixel circuit 11 from flowing to the first sub-pixel of the first display area AA1, thereby preventing the first sub-pixel from generating weak light in the photographing mode to affect the photographing effect; on the other hand, the first display area AA1 can be made transparent by directly controlling the on/off state of the first switch module 50, and it is not necessary to make the first display area transparent by supplying a higher data voltage signal to the first pixel circuit 11, which can reduce power consumption.
Fig. 3 is an enlarged schematic view of a region Q in fig. 1. In some embodiments, as shown in fig. 3, the first switch module 50 may include a first switch element 51 and a second switch element 52. The display panel further includes a first control signal line 41, a second control signal line 42, and an off-voltage signal line 43.
A first terminal of the first switching element 51 is electrically connected to the light emission control signal line 20, a control terminal of the first switching element 51 is electrically connected to the first control signal line 41, and a second terminal of the first switching element 51 is electrically connected to the first pixel circuit 11. A first terminal of the second switching element 52 is electrically connected to the off-voltage signal line 43, a control terminal of the second switching element 52 is electrically connected to the second control signal line 42, and a second terminal of the second switching element 52 is electrically connected to the first pixel circuit 11. The first control signal line 41 is for providing a first control signal (SW1) to the first switching element 51, and the second control signal line 42 is for providing a second control signal (SW2) to the second switching element 52.
For example, in the non-photographing mode, the first control signal (SW1) provided by the first control signal line 41 to the first switch element 51 may be an on voltage, and the second control signal (SW2) provided by the second control signal line 42 to the second switch element 52 may be an off voltage, so that the emission control signal (EM) on the emission control signal line 20 can be normally transmitted to the first pixel circuit 11, and the first sub-pixels of the first display area AA1 can be normally displayed by emitting light. In the photographing mode, the first control signal (SW1) supplied from the first control signal line 41 to the first switching element 51 may be an off voltage, the second control signal (SW2) supplied from the second control signal line 42 to the second switching element 52 may be an on voltage, so that the first switching element 51 is in a non-conducting state in the photographing mode, the second switching element 52 is in a conducting state in the photographing mode, so that the emission control signal (EM) on the emission control signal line 20 cannot be transmitted to the first pixel circuit 11, the off voltage signal (PVGH) on the off voltage signal line 43 is transmitted to the first pixel circuit 11 through the second switching element 52, so that the switching tube electrically connected to the emission control signal line 20 in the first pixel circuit 11 may be in a non-conducting state, for example, the fifth transistor T5 and the sixth transistor T6 in fig. 2 may be in a non-conducting state, so that the first path and the third path in fig. 2 are cut off, the leakage current flows to the control terminal of the first transistor T1 through the second path, and the potential of the control terminal of the first transistor T1 is pulled high, so that the gray scale of the first sub-pixel in the first display area AA1 can be reduced, and the photographing effect can be further improved.
In some embodiments, the first control signal line 41, the second control signal line 42 and the off-voltage signal line 43 may be located in the non-display area NA. The first control signal line 41, the second control signal line 42, and the off-voltage signal line 43 may be electrically connected to an integrated circuit chip of the display panel 100.
In some embodiments, referring to fig. 1, the data lines 30 of the display panel 100 extend along the second direction Y and are distributed at intervals in the first direction X, and at least a portion of the data lines 30 are electrically connected to the first pixel circuits 11 through the second switch module 60.
To better understand the function of the second switch module 60 provided in the embodiment of the invention, please refer to fig. 2, as shown in fig. 2, if the second switch module 60 is not provided between the light-emitting control signal line 20 and the first pixel circuit 11, in the photographing mode, the control terminal of the first transistor T1 and the anode of the first sub-pixel in the first display area AA1 cannot be guaranteed to be maintained at the low voltage, so that the image sticking phenomenon exists.
According to the display panel 100 of the embodiment of the invention, the second switch module 60 is disposed between the first pixel circuit 11 and the data line 30, and the on/off state of the second switch module 60 is controlled to control whether the data voltage on the data line 30 is transmitted to the first pixel circuit, for example, in the non-photographing mode, the second switch module 60 may be controlled to be in the conducting state, so as to ensure that the data voltage on the data line 30 can be normally transmitted to the first pixel circuit 11, and further the first sub-pixel of the first display area AA1 can normally emit light for display, in the photographing mode, the second switch module 60 may be controlled to be in the non-conducting state, so as to prevent the data voltage on the data line 30 from being transmitted to the first pixel circuit 11, and further ensure that the control terminal of the driving transistor in the first pixel circuit 11 and the anode of the first sub-pixel are maintained at the low potential, for example, the control terminal of the first transistor T1 and the anode of the organic light emitting diode (O L) in fig. 2 are maintained at the reference voltage (Vref) potential, thereby preventing the phenomenon from further ensuring the image sticking effect.
In some embodiments, as shown in fig. 3, the second switch module 60 may include a third switch element 61. A first terminal of the third switching element 61 is electrically connected to the data line 30, a control terminal of the third switching element 61 is electrically connected to the first control signal line 41, and a second terminal of the third switching element 61 is electrically connected to the first pixel circuit 11.
For example, in the non-photographing mode, the first control signal (SW1) provided by the first control signal line 41 to the third switching element 61 may be an on voltage, the data voltage on the data line 30 may be normally transmitted to the first pixel circuit 11, and the first sub-pixel of the first display area AA1 may normally emit light for display, in the photographing mode, the first control signal (SW1) provided by the first control signal line 41 to the third switching element 61 may be an off voltage, and the data voltage on the data line 30 may not be transmitted to the first pixel circuit 11, thereby ensuring that the control terminal of the driving transistor in the first pixel circuit 11 and the anode of the first sub-pixel are maintained at a low potential, for example, the control terminal of the first transistor T1 and the anode of the organic light emitting diode (O L) in fig. 2 may be maintained at a reference voltage (Vref) potential, preventing the afterimage phenomenon, further ensuring the photographing effect, and the control terminal of the third switching element 61 and the control terminal of the first switching element 51 may be electrically connected to the first switching element 41, thereby reducing the complexity of the control of the first switching element 41 and the first switching element 51 through the first switching process.
In any of the above embodiments, the first switch element 51, the second switch element 52, and the third switch element 53 may all be thin film transistors, for example, the first switch element 51, the second switch element 52, and the third switch element 53 may be any one of a metal oxide semiconductor (CMOS) thin film transistor, a low temperature polysilicon (L TPS) thin film transistor, or an Indium Gallium Zinc Oxide (IGZO) thin film transistor, and optionally, the first switch element 51, the second switch element 52, and the third switch element 53 may be configured as the same type of thin film transistor to simplify the process.
In some embodiments, referring to fig. 1, the second pixel circuit 12 of the display panel 100 is electrically connected to a second sub-pixel (not shown) of the second display area AA2, and the first pixel circuit 11, the second pixel circuit 12 and the light-emitting control signal line 20 are disposed in the second display area AA 2.
In the first direction X, the first display area AA1 is located between the second display areas AA2, that is, the second display areas AA2 are disposed at both sides of the first display area AA 1. The light emission control signal line 20 may include a first light emission control signal line 21 and a second light emission control signal line 22. In the first direction X, the first light emission control signal lines 21 are located on both sides of the first display area AA1, and the first light emission control signal lines 21 are electrically connected to the corresponding first pixel circuits 11 and second pixel circuits 12. The second emission control signal line 22 is electrically connected only to the corresponding second pixel circuit 12.
According to the embodiment of the invention, by disposing the first pixel circuit 11 corresponding to the first display area AA1 in the second display area AA2, the light transmittance of the first display area AA1 can be further improved.
In some embodiments, the display panel further includes a third display region disposed between the first display region and the second display region, the third display region may serve as a transition display region between the first display region and the second display region, so as to reduce a display difference between the first display region and the second display region, and further, the first pixel circuit 11 for driving the first sub-pixel of the first display region AA1 to emit light may be disposed in the third display region.
In some embodiments, one light emission control signal line 20 may be electrically connected to one row of pixel circuits, or one light emission control signal line 20 may be electrically connected to two rows of pixel circuits, which is not limited in the present invention.
In some embodiments, the circuit structure of the second pixel circuit 12 may be any one of a 3T1C circuit, a 6T1C circuit, a 6T2C circuit, a 7T1C circuit, a 7T2C circuit, or a 9T1C circuit. Herein, the "3T 1C circuit" refers to a pixel circuit including 3 thin film transistors (T) and 1 capacitor (C) in the pixel circuit, and the other "7T 1C circuit", "7T 2C circuit", "9T 1C circuit", and the like are analogized. Optionally, the first pixel circuit 11 and the second pixel circuit 12 have the same circuit structure.
For example, according to the display panel 100 of any of the embodiments, the display panel 100 may further include an encapsulation layer, and a polarizer and a cover plate located above the encapsulation layer, or the cover plate may be directly disposed above the encapsulation layer without disposing a polarizer, or at least the cover plate may be directly disposed above the encapsulation layer of the first display area AA1 without disposing a polarizer, so as to avoid the polarizer from affecting the light collection amount of the photosensitive element disposed below the first display area AA1, and of course, the polarizer may also be disposed above the encapsulation layer of the first display area AA 1.
As shown in fig. 4 or fig. 5, an embodiment of the present invention further provides a first pixel circuit 13, where the first pixel circuit 13 is configured to drive a first sub-pixel of a first display area of a display panel, and the display panel further has a second display area, and a light transmittance of the first display area is greater than a light transmittance of the second display area. The first pixel circuit 13 includes a data writing module 71, a driving module 72, a light emitting control module 73, a light emitting module 74, and a first switching module 50.
The data writing module 71 is electrically connected to the data line (Vdata), the Scan line (Scan), and the driving module 72, the data writing module 71 is configured to write a data voltage into the driving module 72, the driving module 72 is electrically connected to the first power signal line (E L VDD), the driving module 72 is configured to output a driving signal according to the data voltage, the light emission control module 73 is electrically connected to the driving module 72 and the light emitting module 74 and electrically connected to the light emission control signal line through the first switch module 50, and the light emission control module 73 controls the driving signal to be output to the light emitting module 74 in response to a light emission control signal (EM) on the light emission control signal line, so as to control the light emitting module 74 to emit light.
According to the first pixel circuit 13 of the embodiment of the invention, the first pixel circuit 13 is used for driving the first sub-pixel of the first display area of the display panel, that is, the light emitting module 74 may be the first sub-pixel of the first display area. The light-emitting control module 73 of the first pixel circuit 13 is not electrically connected to the light-emitting control signal line directly, but is electrically connected to the light-emitting control signal line through the first switch module 50, so that whether the light-emitting control signal (EM) on the light-emitting control signal line 20 can be transmitted to the light-emitting control module 73 can be controlled by controlling the on-off state of the first switch module 50. For example, in the photographing mode, the first switch module 50 may be turned off, and the light-emitting control signal (EM) on the light-emitting control signal line 20 cannot be transmitted to the light-emitting control module 73, so that the first sub-pixel of the first display area AA1 does not emit light, and the first display area AA1 may be in a transparent state, thereby avoiding affecting the photographing effect. In the non-photographing mode, the first switch module 50 may be in a conducting state, and the light-emitting control signal (EM) on the light-emitting control signal line 20 is normally transmitted to the light-emitting control module 73, so that the first sub-pixel of the first display area AA1 emits light normally, and the normal display of the first display area AA1 is not affected.
According to the embodiment of the present invention, on one hand, the light-emitting control signal (EM) on the light-emitting control signal line 20 cannot be transmitted to the light-emitting control module 73, so that it can be avoided that the leakage current caused by the turn-off component of the switching tube in the data writing module 71 flows to the first sub-pixel of the first display area AA1, and thus the first sub-pixel is prevented from generating weak light in the photographing mode to affect the photographing effect; on the other hand, the first display area AA1 can be made transparent by directly controlling the on/off state of the first switch module 50, and it is not necessary to make the first display area transparent by supplying a high data voltage signal to the first pixel circuit 13, which can reduce power consumption.
In some embodiments, as shown in fig. 5, the data writing module 71 is electrically connected to the data line (Vdata) through the second switching module 60. Alternatively, as shown in fig. 4, the data writing module 71 is electrically connected to the driving module 72 through the second switch module 60.
In the first pixel circuit 13 according to the embodiment of the invention, the second switch module 60 is disposed between the data writing module 71 and the data line, or the second switch module 60 is disposed between the data writing module 71 and the driving module 72, so that whether the data voltage on the data line is transmitted to the light emitting module 74 can be controlled by controlling the on/off state of the second light emitting module 60. For example, in the non-photographing mode, the second switch module 60 may be controlled to be in the on state, so as to ensure that the data voltage on the data line can be normally transmitted to the light emitting module 74, and the first sub-pixel of the first display area AA1 can normally emit light for displaying. In the photographing mode, the second switch module 60 can be controlled to be in a non-conducting state to prevent the data voltage on the data line from being transmitted to the light emitting module 74, so as to ensure that the control terminal of the driving transistor in the driving module 72 and the anode of the first sub-pixel are maintained at a low potential, thereby preventing the image sticking phenomenon and further ensuring the photographing effect.
In some embodiments, as shown in fig. 6, the first pixel circuit 13 includes ten transistors, and an eighth transistor T8, a ninth transistor T9, and a tenth transistor T10 are added with respect to fig. 2. The data writing block 71 of the first pixel circuit 13 may include the second transistor T2, the driving block 72 may include the first transistor T1, and the light emission control block 73 may include the fifth transistor T5 and the sixth transistor T6. The first switching module 50 may include an eighth transistor T8 and a ninth transistor T9, and the second switching module 60 may include a tenth transistor T10.
Only the differences between fig. 6 and fig. 2 will be described below, and the same points between them will not be described again.
In contrast to fig. 2, in the first pixel circuit 13 shown in fig. 6, the eighth transistor T8 and the ninth transistor T9 are added between the light-emitting control module 73 and the light-emitting control signal (EM) input terminal, that is, the eighth transistor T8 and the ninth transistor T9 are added between the fifth transistor T5 and the sixth transistor T6 and the light-emitting control signal line. A control terminal of the eighth transistor T8 is electrically connected to the first control signal line, a first control signal (SW1) on the first control signal line controls on and off states of the eighth transistor T8, a first terminal of the eighth transistor T8 is electrically connected to the light emission control signal line, and a second terminal of the eighth transistor T8 is electrically connected to control terminals of the fifth transistor T5 and the sixth transistor T6. A control terminal of the ninth transistor T9 is electrically connected to the second control signal line, a second control signal (SW2) on the second control signal line controls the on and off states of the ninth transistor T9, a first terminal of the ninth transistor T9 is electrically connected to an off voltage signal line, the off voltage signal line may provide an off voltage signal (PVGH), and a second terminal of the ninth transistor T9 is electrically connected to control terminals of the fifth transistor T5 and the sixth transistor T6.
For example, in the non-photographing mode, the first control signal (SW1) supplied from the first control signal line to the eighth transistor T8 may be an on voltage, and the second control signal (SW2) supplied from the second control signal line to the ninth transistor T9 may be an off voltage, so that the emission control signal (EM) on the emission control signal line can be normally transmitted to the fifth transistor T5 and the sixth transistor T6, and the first sub-pixel of the first display region can normally emit light for display. In the photographing mode, the first control signal (SW1) supplied from the first control signal line to the eighth transistor T8 may be an off voltage, the second control signal (SW2) supplied from the second control signal line to the ninth transistor T9 may be an on voltage, so that the eighth transistor T8 is in a non-conductive state in the photographing mode, the ninth transistor T9 is in a conductive state in the photographing mode, so that the emission control signal (EM) on the emission control signal line cannot be transmitted to the first pixel circuit 11, the off voltage signal (PVGH) on the off voltage signal line is transmitted to the control terminals of the fifth transistor T5 and the sixth transistor T6 through the ninth transistor T9, the fifth transistor T5 and the sixth transistor T6 may be in a non-conductive state, for example, the first path and the third path in fig. 2 may be cut off, and the leakage current may all flow to the control terminal of the first transistor T1 through the second path, the control terminal of the first transistor T1 is pulled high, so that the gray scale of the first sub-pixel in the first display area can be reduced, and the photographing effect can be further improved.
With respect to fig. 2, the first pixel circuit 13 shown in fig. 6 is additionally provided with a tenth transistor T10 between the data writing module 71 and the driving module 72, a control terminal of the tenth transistor T10 is electrically connected to the first control signal line, the first control signal (SW1) on the first control signal line controls the on and off states of the tenth transistor T10, a first terminal of the tenth transistor T10 is electrically connected to the data line, and a second terminal of the tenth transistor T10 is electrically connected to the first terminal of the first transistor T1 and the second terminal of the fifth transistor T5.
For example, in the non-photographing mode, the first control signal (SW1) provided by the first control signal line 41 to the tenth transistor T10 may be an on voltage, and the data voltage (Vdata) on the data line may be normally transmitted to the driving module 72, so that the first sub-pixel of the first display region can normally emit light for display, in the photographing mode, the first control signal (SW1) provided by the first control signal line to the tenth transistor T10 may be an off voltage, and the data voltage (Vdata) on the data line may not be transmitted to the driving module 72, so that the control terminal of the first transistor T1 and the anode of the first sub-pixel are maintained at a low potential, for example, the control terminal of the first transistor T1 and the anode of the organic light emitting diode (O L ED) in fig. 6 may be maintained at a reference voltage (Vref) potential, thereby preventing the afterimage phenomenon, further ensuring the photographing effect, and the control terminals of the tenth transistor T10 and the eighth transistor T2 are connected to the first control signal line T8 3, thereby reducing the complexity of the first transistor T3523 and the complicated process.
With respect to fig. 2, the third transistor T3 of the first pixel circuit 13 shown in fig. 6 may be two transistors connected in series, and control terminals of the two transistors connected in series are both electrically connected to the second Scan signal (Scan2) input terminal; the fourth transistor T4 of the first pixel circuit 13 shown in fig. 6 may be two transistors connected in series, and control terminals of the two transistors connected in series are both electrically connected to the first Scan signal (Scan1) input terminal.
As shown in fig. 7, the embodiment of the invention further provides a display panel 200, the display panel 200 includes a first display area AA1, a second display area AA2, and a non-display area NA surrounding the first display area AA1 and the second display area AA2, and the light transmittance of the first display area AA1 is greater than that of the second display area AA 2. The display panel 200 includes the first pixel circuit 13 in any of the above embodiments, and the first pixel circuit 13 is electrically connected to the first sub-pixel of the first display area AA 1.
Herein, it is preferable that the light transmittance of the first display area AA1 is 15% or more. To ensure that the light transmittance of the first display area AA1 is greater than 15%, even greater than 40%, or even higher, the light transmittance of at least some functional film layers of the display panel 200 in this embodiment is greater than 80%, or even greater than 90%.
According to the display panel 200 of the embodiment of the invention, the light transmittance of the first display area AA1 is greater than that of the second display area AA2, so that the display panel 200 can integrate a photosensitive component on the back of the first display area AA1, and realize the under-screen integration of the photosensitive component such as a camera, and meanwhile, the first display area AA1 can display a picture, so that the display area of the display panel 200 is increased, and the full-screen design of the display device is realized.
The second pixel circuit 14 of the display panel 200 is electrically connected to a second sub-pixel (not shown) of the second display area AA2, and the first pixel circuit 13, the second pixel circuit 14 and the light-emitting control signal line 20 are disposed in the second display area AA 2.
In the first direction X, the first display area AA1 is located between the second display areas AA2, that is, the second display areas AA2 are disposed at both sides of the first display area AA 1. The light emission control signal line 20 may include a first light emission control signal line 21 and a second light emission control signal line 22. In the first direction X, the first light emission control signal lines 21 are located on both sides of the first display area AA1, and the first light emission control signal lines 21 are electrically connected to the corresponding first and second pixel circuits 13 and 14. The second emission control signal line 22 is electrically connected only to the corresponding second pixel circuit 14.
According to the embodiment of the invention, by disposing the first pixel circuit 11 corresponding to the first display area AA1 in the second display area AA2, the light transmittance of the first display area AA1 can be further improved.
For example, the display panel 200 may further include an encapsulation layer, and a polarizer and a cover plate located above the encapsulation layer, or the cover plate may be directly disposed above the encapsulation layer, without disposing a polarizer, or at least the cover plate may be directly disposed above the encapsulation layer of the first display area AA1, without disposing a polarizer, so as to avoid the polarizer from affecting the light collection amount of the photosensitive element disposed below the first display area AA1, and of course, the polarizer may also be disposed above the encapsulation layer of the first display area AA 1.
An embodiment of the present invention further provides a display device, which may include the display panels 100 and 200 according to any of the above embodiments. The following description will be given taking as an example a display device of an embodiment including the display panels 100, 200 of the above embodiments.
Fig. 8 is a schematic top view of a display device according to an embodiment of the present invention, and fig. 9 is a cross-sectional view taken along a line a-a of fig. 8 according to an embodiment of the present invention. In the display device of the present embodiment, the display panel 100, 200 may be the display panel 100, 200 of one of the above embodiments, the display panel 100, 200 has a first display area AA1 and a second display area AA2, and the light transmittance of the first display area AA1 is greater than the light transmittance of the second display area AA 2.
The display panel 100, 200 includes a first surface S1 and a second surface S2 opposite to each other, wherein the first surface S1 is a display surface. The display device further includes a photosensitive element 300, the photosensitive element 300 is located on the second surface S2 side of the display panel 100, 200, and the photosensitive element 300 corresponds to the first display area AA 1.
The photosensitive assembly 300 may be an image capturing device for capturing external image information. In this embodiment, the photosensitive assembly 300 is a Complementary Metal Oxide Semiconductor (CMOS) image capture device, and in other embodiments, the photosensitive assembly 300 may also be a Charge-coupled device (CCD) image capture device or other types of image capture devices. It is understood that the photosensitive assembly 300 may not be limited to being an image capture device, for example, in some embodiments, the photosensitive assembly 300 may also be an infrared sensor, a proximity sensor, an infrared lens, a flood sensing element, an ambient light sensor, a dot matrix projector, and the like. In addition, the display device may further integrate other components, such as a handset, a speaker, etc., on the second surface S2 of the display panel 100, 200.
According to the display device of the embodiment of the invention, the light transmittance of the first display area AA1 is greater than that of the second display area AA2, so that the display panels 100 and 200 can integrate the photosensitive assembly 300 on the back of the first display area AA1, for example, the photosensitive assembly 300 of an image acquisition device is integrated under a screen, and meanwhile, the first display area AA1 can display a picture, so that the display areas of the display panels 100 and 200 are increased, and the full-screen design of the display device is realized.
According to the display apparatus of the embodiment of the present invention, whether the emission control signal (EM) on the emission control signal line 20 can be transmitted to the first pixel circuit 11 is controlled by controlling the switching state of the first switching block 50. For example, in the photographing mode, the first switch module 50 may be in an off state, and the light-emitting control signal (EM) on the light-emitting control signal line 20 cannot be transmitted to the first pixel circuit 11, so that the first sub-pixel of the first display area AA1 does not emit light, and the first display area AA1 may be in a transparent state, thereby avoiding affecting the photographing effect. On one hand, the light emitting control signal (EM) on the light emitting control signal line 20 cannot be transmitted to the first pixel circuit 11, so that the leakage current caused by some switching tube turn-off components in the first pixel circuit 11 can be prevented from flowing to the first sub-pixel of the first display area AA1, and the first sub-pixel is prevented from generating weak light in the photographing mode to affect the photographing effect; on the other hand, the first display area AA1 can be made transparent by directly controlling the on/off state of the first switch module 50, and it is not necessary to make the first display area transparent by supplying a higher data voltage signal to the first pixel circuit 11, which can reduce power consumption.
In accordance with the above-described embodiments of the present invention, these embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention and various embodiments with various modifications as are suited to the particular use contemplated. The invention is limited only by the claims and their full scope and equivalents.
Claims (10)
1. A display panel having a first display region and a second display region, the first display region having a light transmittance greater than that of the second display region, the display panel comprising:
the first pixel circuit is electrically connected with the first sub-pixel of the first display area;
a plurality of light emission control signal lines extending in a first direction and spaced apart from each other in a second direction intersecting the first direction;
at least part of the light-emitting control signal lines are electrically connected with the first pixel circuit through a first switch module.
2. The display panel according to claim 1, wherein the first switch module comprises a first switch element and a second switch element, and the display panel further comprises a first control signal line, a second control signal line, and an off-voltage signal line;
a first end of the first switching element is electrically connected with the light-emitting control signal line, a control end of the first switching element is electrically connected with the first control signal line, and a second end of the first switching element is electrically connected with the first pixel circuit;
a first terminal of the second switching element is electrically connected to the off-voltage signal line, a control terminal of the second switching element is electrically connected to the second control signal line, and a second terminal of the second switching element is electrically connected to the first pixel circuit.
3. The display panel according to claim 2, wherein a plurality of data lines of the display panel extend along the second direction and are spaced apart from each other in the first direction, and at least a portion of the data lines are electrically connected to the first pixel circuits through a second switch module.
4. The display panel according to claim 3, wherein the second switch module includes a third switch element, a first terminal of the third switch element is electrically connected to the data line, a control terminal of the third switch element is electrically connected to the first control signal line, and a second terminal of the third switch element is electrically connected to the first pixel circuit.
5. The display panel according to claim 4, wherein the first switching element, the second switching element, and the third switching element are all thin film transistors.
6. The display panel according to any one of claims 1 to 5, wherein a second pixel circuit of the display panel is electrically connected to a second sub-pixel of the second display region, and the first pixel circuit, the second pixel circuit, and the emission control signal line are provided in the second display region;
the light-emitting control signal lines include first light-emitting control signal lines and second light-emitting control signal lines, the first light-emitting control signal lines are located on two sides of the first display area in the first direction, the first light-emitting control signal lines are electrically connected with the corresponding first pixel circuits and the corresponding second pixel circuits, and the second light-emitting control signal lines are electrically connected with the corresponding second pixel circuits.
7. A first pixel circuit for driving a first sub-pixel of a first display region of a display panel, the display panel further comprising a second display region, a light transmittance of the first display region being greater than a light transmittance of the second display region, the first pixel circuit comprising: the device comprises a data writing module, a driving module, a light emitting control module, a light emitting module and a first switch module;
the data writing module is electrically connected with the data line, the scanning line and the driving module and is used for writing data voltage into the driving module;
the driving module is used for outputting a driving signal according to the data voltage;
the light-emitting control module is electrically connected with the driving module and the light-emitting module and is electrically connected with the light-emitting control signal line through the first switch module, and the light-emitting control module responds to the light-emitting control signal on the light-emitting control signal line to control the driving signal to be output to the light-emitting module and control the light-emitting module to emit light.
8. The first pixel circuit according to claim 7, wherein the data writing module is electrically connected to the data line through a second switching module, or the data writing module is electrically connected to the driving module through the second switching module.
9. A display panel comprising the first pixel circuit according to any one of claims 7 to 8, the display panel having a first display region and a second display region, the first display region having a light transmittance greater than that of the second display region, the first pixel circuit being electrically connected to the first sub-pixel of the first display region.
10. A display device comprising the display panel according to any one of claims 1 to 6, or comprising the display panel according to claim 9.
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Application publication date: 20200728 |