CN110649080B - Display panel and display device - Google Patents
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- CN110649080B CN110649080B CN201910945415.9A CN201910945415A CN110649080B CN 110649080 B CN110649080 B CN 110649080B CN 201910945415 A CN201910945415 A CN 201910945415A CN 110649080 B CN110649080 B CN 110649080B
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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
- H10K59/122—Pixel-defining structures or layers, e.g. banks
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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
- H10K59/121—Active-matrix OLED [AMOLED] displays characterised by the geometry or disposition of pixel elements
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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
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- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2300/00—Aspects of the constitution of display devices
- G09G2300/04—Structural and physical details of display devices
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- G—PHYSICS
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- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2300/00—Aspects of the constitution of display devices
- G09G2300/04—Structural and physical details of display devices
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Abstract
The invention discloses a display panel and a display device. The display panel comprises a display area, the display area comprises a light sensing display area and a first display area, the light sensing display area and the first display area are arranged along a first direction, the display area comprises display sub-pixels, the light sensing display area also comprises virtual sub-pixels, and the total density of the display sub-pixels and the virtual sub-pixels in the light sensing display area is smaller than the density of the display sub-pixels in the first display area; the display panel further comprises a plurality of first signal lines which extend along the second direction and are arranged along the first direction, the first signal lines comprise first sub-signal lines which penetrate through the light sensing display area and second sub-signal lines which penetrate through the first display area, and the total number of the display sub-pixels and the virtual sub-pixels which are connected through the first sub-signal lines is equal to the number of the display sub-pixels which are connected through the second sub-signal lines. The virtual sub-pixels can effectively compensate the load on the first sub-signal lines in the light sensing display area, so that the load difference caused by the pixel density difference between the first sub-signal lines and the second sub-signal lines is reduced or even eliminated, the consistency of the load areas on the first sub-signal lines and the second sub-signal lines is ensured, and the display uniformity is effectively improved.
Description
Technical Field
The present invention relates to the field of display technologies, and in particular, to a display panel and a display device.
Background
Organic light emitting display devices have advantages of self-luminescence, low power consumption, high brightness, and the like, and are widely used in various electronic display devices.
At present, a full screen starts to enter the visual field of people due to the fact that the full screen has a stronger visual effect, and the technical requirements of the full screen cannot be completely met due to the fact that display equipment, particularly mobile phones, need front cameras, indicator lamps and the like. Therefore, in the prior art, the sub-pixel density of the front camera area is reduced, so that the light collection amount of the front camera area is increased due to the reduction of the sub-pixel density, and the normal shooting function of the camera can be realized; and meanwhile, a certain number of sub-pixels are reserved, and the display effect under low requirements can be further met.
However, due to the fact that the sub-pixel density of the camera area is reduced, obvious load difference occurs between the camera area and the non-camera area, an obvious screen splitting phenomenon occurs, and the whole display effect is affected.
Disclosure of Invention
In view of this, the present invention provides a display panel and a display device, which effectively reduce the load difference between different sub-pixel density regions and effectively reduce the split screen phenomenon on the premise of ensuring that the light transmittance of the camera is not reduced.
In one aspect, the present invention provides a display panel, comprising:
the display area comprises a light sensing display area and a first display area, and the light sensing display area and the first display area are arranged along a first direction;
the display area comprises a plurality of display sub-pixels, pixel circuits in the display sub-pixels drive the display sub-pixels to emit light and display pictures, the light sensing display area also comprises a plurality of virtual sub-pixels, and electric signals in the virtual sub-pixels are partially isolated;
the total density of the display sub-pixels and the virtual sub-pixels in the light sensing display area is less than that of the display sub-pixels in the first display area;
the display panel further comprises a plurality of first signal lines extending along a second direction and arranged along the first direction, the first signal lines comprise first sub-signal lines penetrating through the light sensing display area and second sub-signal lines penetrating through the first display area, the total number of the display sub-pixels and the virtual sub-pixels connected by the first sub-signal lines is n1, the number of the display sub-pixels connected by the second sub-signal lines is n2, n1 is K1 and n2, wherein K1 is not less than 0.99 and not more than 1.01, and the second direction intersects with the first direction.
In another aspect, the invention further provides a display device comprising the display panel.
The display panel provided by the embodiment of the invention comprises a display area, wherein the display area comprises a light sensing display area and a first display area, and the light sensing display area and the first display area are arranged along a first direction; because the pixel density in the light sensing display area is lower than that in the first display area, the virtual sub-pixels which do not perform picture display are arranged in the light sensing display area, on one hand, the arranged virtual sub-pixels and the display sub-pixels are positioned in the same row or the same column, and therefore the virtual sub-pixels are arranged on the routing lines of the two adjacent display sub-pixels, and the light transmittance of the arranged virtual sub-pixels cannot be reduced; on the other hand, coupling capacitance is generated by a metal film layer structure reserved in the virtual sub-pixel and signal lines such as a data line or a scanning line, so that capacitance load on the signal lines is increased, load on a first sub-signal line of the light sensing display area can be effectively compensated, load difference caused by pixel density difference on the first sub-signal line penetrating through the light sensing display area and a second sub-signal line penetrating through the first display area is reduced or even eliminated, consistency of load areas on the first sub-signal line and the second sub-signal line is guaranteed, and display uniformity is effectively improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the embodiments will be briefly described below.
Fig. 1 is a schematic plan view of a display panel according to an embodiment of the present invention;
fig. 2 is a schematic plan view of another display panel according to an embodiment of the present invention;
fig. 3 is a schematic plan view of a display panel according to an embodiment of the present invention;
fig. 4 is a schematic plan view of a display panel according to an embodiment of the present invention;
fig. 5 is a schematic plan view of a display panel according to an embodiment of the present invention;
FIG. 6 is a schematic cross-sectional view taken along section line XX' in FIG. 1 according to an embodiment of the present invention;
FIG. 7 is a schematic diagram of a prior art pixel circuit;
FIG. 8 is a structural layout corresponding to the pixel circuit of FIG. 7;
FIG. 9 is a schematic diagram of a pixel circuit at the position M in FIG. 2 according to an embodiment of the present invention;
FIG. 10 is a schematic diagram of a pixel circuit of FIG. 9;
fig. 11 is a schematic plan view of a display panel according to an embodiment of the present invention;
fig. 12 is a schematic structural diagram of a display device according to an embodiment of the present invention.
Detailed Description
For better understanding of the technical solutions of the present invention, the following detailed descriptions of the embodiments of the present invention are provided with reference to the accompanying drawings.
It should be understood that the described embodiments are only some embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The terminology used in the embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the examples of the present invention and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
It should be understood that the term "and/or" as used herein is merely one type of association that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.
On the premise of ensuring that the light transmittance of the camera is not influenced, the invention effectively reduces the load difference between different sub-pixel density areas, effectively reduces the split screen phenomenon and improves the display effect of the display screen, so the invention designs the following technical scheme:
the present embodiment provides a display panel, please refer to fig. 1 and fig. 2.
Specifically, as shown in fig. 1, fig. 1 is a schematic plan view of a display panel according to an embodiment of the present invention, where the display panel 100 includes: a display area AA including a light sensing display area a1 and a first display area a2, the light sensing display area a1 and the first display area a2 being arranged along the first direction Y; the display panel further includes a plurality of data lines and scan lines (not shown) crossing each other, the first direction Y may be a direction in which the data lines extend, and may also be a direction in which the scan lines extend, which is not limited herein, and the following embodiments are exemplified by taking the first direction Y as a direction in which the data lines extend.
Specifically, as shown in fig. 2, fig. 2 is another schematic plane structure diagram of the display panel according to the embodiment of the present invention, wherein the display area AA includes a plurality of display sub-pixels 10, that is, the light-sensing display area a1 and the first display area a2 are both provided with the display sub-pixels 10, the pixel circuits in the display sub-pixels 10 drive the display sub-pixels to emit light, and perform image display, the light-sensing display area a1 further includes a plurality of virtual sub-pixels 20, and the electrical signals in the virtual sub-pixels 20 are partially blocked; the display sub-pixel is a conventional sub-pixel, and is provided with a complete pixel circuit and a light-emitting device layer, and the pixel circuit can drive the light-emitting device layer to emit light; the virtual sub-pixels can not be normally lightened to emit light unlike the display sub-pixels, and the electric signals cannot be normally conducted due to the fact that the pixel circuits and the light emitting device layers included in the virtual sub-pixels are incomplete, so that the electric signals are partially cut off, and the display picture cannot be lightened by the virtual sub-pixels.
With continued reference to fig. 2, the total density of the display sub-pixels 10 and the virtual sub-pixels 20 in the light sensing display area a1 is less than the density of the display sub-pixels 10 in the first display area a 2;
it is understood that the density of the sub-pixels refers to the number or average number of sub-pixels in a unit area, and the density of the sub-pixels (including the sum of the display sub-pixels and the dummy sub-pixels) in the light sensing display area is low, so that the light sensing display area has higher light transmittance relative to the first display area, and therefore, a light sensor module may be disposed in the display device corresponding to the light sensing display area, for example, the light sensor module includes one or more of a camera, a fingerprint identifier, a face identifier, an infrared detector, and the like.
With continued reference to fig. 2, the display panel 100 further includes a plurality of first signal lines 30 extending along the second direction X and arranged along the first direction Y, the first signal lines 30 include first sub-signal lines 31 penetrating through the light-sensing display area a1, and second sub-signal lines 32 penetrating through the first display area a2, the total number of the display sub-pixels 10 and the dummy sub-pixels 20 connected by the first sub-signal lines 32 is n1, the number of the display sub-pixels 10 connected by the second sub-signal lines 32 is n2, and n1 is K1 × n2, wherein K1 is 0.99 or more and 1.01 or less, and the second direction intersects with the first direction.
It can be understood that, conventionally, the light-sensing display area a1 reduces the density of the sub-pixels due to the requirement of high transmittance, so that the number of the sub-pixels connected to the first sub-signal line 31 is smaller than the number of the sub-pixels connected to the second sub-signal line 32, resulting in uneven loading on the two signal lines, and split screen or stripe display; therefore, in the present application, the dummy sub-pixels are additionally disposed on the first sub-signal line 31, so that the total number of sub-pixels (including the display sub-pixels and the dummy sub-pixels) on the first sub-signal line 31 is approximately equal to the number of sub-pixels (including only the display sub-pixels) on the second sub-signal line 32, thereby ensuring load balance between two corresponding signal lines in the two regions. Specifically, the second sub-signal line 32 may overlap with each metal film layer of the pixel circuit and each metal film layer of the light emitting device connected to the corresponding display sub-pixel to generate a coupling capacitor or a parasitic capacitor, so as to increase a capacitive load on the second sub-signal line 32; and the first sub-signal line 31 and its connected display sub-pixel and the corresponding array film layer and light emitting device film layer on the dummy sub-pixel overlap to generate a coupling capacitance, thereby balancing the load of the coupling capacitance on the first sub-signal line 31 and the second sub-signal line 32.
Therefore, in the embodiment of the application, the virtual sub-pixels which do not perform picture display are arranged in the light sensing display area, on one hand, the arranged virtual sub-pixels and the arranged display sub-pixels are positioned in the same row or the same column, so that the virtual sub-pixels are arranged on the routing lines of the two adjacent display sub-pixels, and the light transmittance of the arranged virtual sub-pixels cannot be reduced; on the other hand, the metal film layer structure reserved in the virtual sub-pixel and the first sub-signal line generate coupling capacitance, so that the capacitance load on the first sub-signal line is increased, the load on the first sub-signal line of the light sensing display area can be effectively compensated, the load difference caused by the pixel density difference on the first sub-signal line penetrating through the light sensing display area and the second sub-signal line penetrating through the first display area is reduced or even eliminated, the consistency of the load areas on the first sub-signal line and the second sub-signal line is ensured, and the display uniformity is effectively improved.
Optionally, with continued reference to fig. 2, the display area AA further includes a second display area A3, and the light-sensing display area a1 and the second display area A3 are arranged along the second direction X; the display panel 100 further includes a plurality of second signal lines 40 extending along the first direction Y and arranged along the second direction X, wherein the second signal lines 40 include a third sub-signal line 41 penetrating through the light sensing display area a1 and a fourth sub-signal line 42 penetrating through the second display area A3; the total number of the display sub-pixels 10 and the dummy sub-pixels 20 connected to the third sub-signal line 41 is n3, the number of the display sub-pixels 10 connected to the fourth sub-signal line 42 is n4, n3 is K2 n4, wherein K2 is 0.99-1.01.
It is understood that, when the first direction Y is defined in the extending direction of the data lines, the second direction X is the extending direction of the scan lines, that is, the first signal lines include one or more of the data signal lines and the power voltage signal lines, and the second signal lines include one or more of the scan control signal lines, the light emitting control signal lines, the reference signal lines, and the like; or when the first direction Y is defined in the scan line extending direction, the first signal line includes one or more of a scan control signal line, a light emission control signal line, a reference signal line, and the like, and the second signal line includes one or more of a data signal line, a power supply voltage signal line, and the like. Without limitation, the present application mainly illustrates that the first direction Y defines the extending direction of the data line, and the second direction X defines the extending direction of the scan line.
In the display panel provided by the embodiment of the application, the light sensing display area comprises a first sub-signal line extending along the second direction and a third sub-signal line extending along the first direction, so that the number of sub-pixels (the sum of the number of the display sub-pixels and the number of the virtual sub-pixels) connected with the first sub-signal line is approximately consistent with the number of sub-pixels (only the display sub-pixels) connected with the second sub-signal line, the consistency of the load areas of the light sensing display area and the first display area along the first direction, namely the column direction is ensured, and the split-screen display phenomenon is reduced; meanwhile, the number of the sub-pixels (the sum of the number of the display sub-pixels and the number of the virtual sub-pixels) connected with the third sub-signal line is consistent with the number of the sub-pixels (only the display sub-pixels) connected with the fourth sub-signal line, so that the loads of the light sensing display area and the second display area tend to be consistent in the second direction, namely the row direction, and finally the load areas of the light sensing display area and the surrounding conventional display areas (namely the first display area and the second display area) are consistent, the split-screen display defect is improved, and the display effect is improved.
Optionally, with continued reference to fig. 2, the light sensing display area a1 includes a plurality of display sub-pixel groups 101 arranged in an array, and the display sub-pixel group 101 includes a plurality of display sub-pixels 10; the light sensing display area a1 further includes a plurality of virtual sub-pixel groups 201 arranged in an array, and the virtual sub-pixel groups 201 include a first virtual sub-pixel group 201A arranged along a second direction;
along the second direction X, a first dummy sub-pixel group 201A is disposed between two adjacent display sub-pixel groups 101.
Because the display sub-pixels in the light sensing display area form the display sub-pixel groups arranged in an array, the display sub-pixel groups are uniformly distributed in the light sensing display area, namely, the distance between two adjacent display sub-pixel groups in the row direction is equal, and the distance between two adjacent display sub-pixel groups in the column direction is equal, so that the display effect in the light sensing display area is improved.
Optionally, with continued reference to fig. 2, the virtual sub-pixel group 201 further includes a second virtual sub-pixel group 201B arranged along the first direction Y; wherein,
along the first direction Y, a second dummy sub-pixel group 201B is disposed between two adjacent display sub-pixel groups 101.
Optionally, referring to fig. 3, fig. 3 is a schematic diagram of another plane structure of the display panel according to the embodiment of the present invention, wherein the total number of the display sub-pixels 10 and the virtual sub-pixels 20 connected to the first sub-signal lines 31 correspondingly connected to the display sub-pixels 10 of the display sub-pixel group 101 along the second direction X is equal to the total number of the display sub-pixels 10 connected to the second sub-signal lines 32;
the total number of the display sub-pixels 10 and the dummy sub-pixels 20 connected by the third sub-signal line 41 correspondingly connected by each display sub-pixel 10 of the display sub-pixel group 101 along the first direction Y is equal to the total number of the display sub-pixels 10 connected by the fourth sub-signal line 42.
In the embodiment of the application, all the display sub-pixels in the light sensing display area are subjected to load compensation, so that the virtual sub-pixels are arranged in the light sensing display area in a compensation mode in rows or columns of the display sub-pixels, the load balance between the light sensing display area and the display areas around the light sensing display area is ensured, the load difference between the light sensing display area and the first display area is further improved, and the display effect is improved.
Optionally, the display sub-pixel group 101 includes a plurality of display sub-pixels 10 arranged along the first direction Y and/or arranged along the second direction X, and the plurality of display sub-pixels 10 in the same display sub-pixel group 101 include a first display sub-pixel 10 a;
along the first direction Y, the distance between two first display sub-pixels 10a in two adjacent display sub-pixel groups 101 is d1, and along the second direction X, the distance between two first display sub-pixels 10a in two adjacent display sub-pixel groups 101 is d2, where d1 is d 2.
Referring to fig. 4 in particular, fig. 4 is a schematic plan view illustrating a display panel according to an embodiment of the present invention, wherein the display sub-pixel group 101 includes a plurality of display sub-pixels 10 arranged along the second direction X. It is understood that the specific arrangement of the display sub-pixel group 101 may be various, and the display sub-pixel 101 may further include a plurality of display sub-pixels 10 arranged only along the first direction Y, which is not explained in detail in the drawings.
Illustratively, as shown in fig. 4, the distance between two first display sub-pixels 10a in two adjacent display sub-pixel groups along the second direction X is d2, and the distance between two first display sub-pixels 10a in two adjacent display sub-pixel groups along the first direction Y is d1, it can also be understood that the number of sub-pixels spaced between the two first display sub-pixels 10a along the row direction is the same as the number of sub-pixels spaced along the column direction, i.e. 3 sub-pixels are spaced as shown in fig. 4.
Thus, the distance between two adjacent display sub-pixel groups in the row direction and the column direction in the light sensing display area satisfies 1: 1, thereby ensuring that the display picture is also in accordance with the following 1: the display is performed at a ratio of 1, and the display effect of distortion or deformation of the picture does not occur.
Specifically, another embodiment of the specific arrangement manner of the display sub-pixel group 101 is shown in fig. 5, and fig. 5 is a schematic plan structure diagram of the display panel provided in the embodiment of the present invention, where the display sub-pixel group 101 includes two display sub-pixels arranged along a first direction Y and further includes two display sub-pixels 10 arranged along a second direction X, as can be seen from fig. 5, the display sub-pixels 10 in the display sub-pixel group 101 are closer to each other, so that the influence of the color mixing difference caused by the larger distance on the display panel effect can be reduced.
Optionally, with continued reference to fig. 5, the display sub-pixel 101 includes a plurality of display sub-pixels 10 arranged along the first direction Y and arranged along the second direction X, where the plurality of display sub-pixels includes three sub-pixels, that is, a first color display sub-pixel 101a, a second color display sub-pixel 101b, and a third color display sub-pixel 101c, the first color display sub-pixel 101a and the second color display sub-pixel 101b are arranged along the second direction X, and the second color display sub-pixel 101b and the third color display sub-pixel 101c are arranged along the first direction Y.
In the embodiment of the application, each display sub-pixel group comprises three display sub-pixels with different colors, and the display sub-pixels are respectively red, blue or green compared with the first color, the second color and the third color, so that the display colors of the display panel are various and the display colors of the display panel are enriched. The second color display sub-pixel 101b can display sub-pixels in green, and because human eyes are higher in sensitivity to green, the third color corresponding to the third sub-pixel 103 is set to green, so that when the human eyes observe a display screen, each display pixel unit can be easily distinguished, the visual resolution is higher, and the visual screen is clearer.
Optionally, as shown in fig. 6, fig. 6 is a schematic cross-sectional view taken along a section line XX' in fig. 1 according to an embodiment of the present invention; the display panel 100 further includes a substrate base plate 1, a pixel circuit layer 2 on the substrate base plate 1, and a light emitting device layer 3 on the pixel circuit layer 2;
the pixel circuit layer 2 comprises an active layer, a grid layer, a metal capacitance layer and a source drain layer, and the light-emitting device layer 3 comprises an anode layer, a light-emitting layer and a cathode layer;
the pixel circuit layer 2 includes a display pixel circuit 210 connected to the display sub-pixel 10, and a dummy pixel circuit 220 connected to the dummy sub-pixel 20; the light emitting device layer 3 includes a display device layer 310 connected to the display sub-pixel 10 to be a dummy device layer 320 connected to the dummy sub-pixel 20;
the display pixel circuit 210 and the dummy pixel circuit 220 have different structures, and the display device layer 310 and the dummy device layer 320 have different structures.
Specifically, please refer to fig. 6, wherein the display device layer 310 includes a first anode 31a located at the anode layer, a first light emitting layer 32a located at the light emitting layer, and a first cathode 33a located at the cathode layer;
the dummy device layer 320 includes a second anode 31b at the anode layer and a second cathode 33b at the cathode layer, the display device layer 310 in the above embodiment has a conventional cathode, anode, light emitting layer, etc. structure, and the dummy display 320 has an anode and a cathode compared to the display device layer 310 but has no light emitting layer, so the dummy display 320 cannot light up the display screen; optionally, the dummy device layer 320 only includes a cathode and does not include a light emitting layer and an anode relative to the display device layer, so that the dummy sub-pixels do not display a picture, and the anodes are removed to increase the light transmittance of the regions corresponding to the dummy sub-pixels.
Optionally, with continued reference to fig. 6, the display pixel circuit 210 includes a first active layer 21a located on the active layer 2, a first gate 22a located on the gate layer 22, and a first source 24a1 and a first drain 24a2 located on the source drain layer 24; the display pixel circuit 210 further comprises a first storage capacitor comprising a first electrode 23a1 in the gate layer and a second electrode 23a2 in the metal capacitor layer; the dummy pixel circuit 220 includes a first gate 22b on the gate layer, and a first source 24b1 and a first drain 24b2 on the source-drain layer.
In this embodiment, the circuit structures of the virtual pixel circuit 220 and the display pixel circuit 210 are different, specifically, the film layer structures of the display pixel circuit 210 and the conventional driving pixel circuit are the same, and the number of transistors is the same, so that the virtual pixel circuit and the display pixel circuit can be used for driving the display sub-pixels to be normally lighted and displaying pictures; in contrast to the display pixel circuit 210, the dummy pixel circuit 220 is not provided with an active layer, so that the dummy sub-pixel cannot be normally turned on, and the light transmittance of the dummy pixel circuit 220 can be increased by removing the active layer.
Optionally, the virtual pixel circuit 220 is not provided with a capacitor structure, and since the metal plate forming the capacitor structure occupies a large area, not only the space is occupied, but also the light transmittance of the virtual pixel circuit is reduced, so that the virtual pixel circuit 220 is not provided with the capacitor structure, and on one hand, the light transmittance is increased on the premise of no light emission; on the other hand, the dummy pixel circuit 220 retains the gate and source drain metals, and the gate and source drain metals form a capacitor structure capable of being overlapped to generate a coupling capacitor, so that the capacitive load on the signal line can still be compensated.
Specifically, referring to fig. 7, fig. 7 is a schematic structural diagram of a pixel circuit in the prior art; the pixel circuit includes first to seventh transistors T1 to T7, wherein gates of the fifth transistor T5 and the seventh transistor T7 are connected to a first gate Scan line Scan1, gates of the second transistor T2 and the fourth transistor T4 are connected to a second gate Scan line Scan2, and gates of the first transistor T1 and the sixth transistor T6 are connected to a light emission control signal line Emit, respectively. A first pole of the first transistor T1 is connected to the power supply signal line PVDD, a first pole of the second transistor T2 is connected to the data line Vdata, and a first pole of the fifth transistor T5 and a first pole of the seventh transistor are connected to the reference voltage line Vref, respectively.
For example, as shown in fig. 8 and fig. 9, fig. 8 is a structural layout corresponding to the pixel circuit in fig. 7, and fig. 9 is a schematic structural diagram of a pixel circuit at a position M in fig. 2 according to an embodiment of the present invention. It should be noted that the M position is shown as the area corresponding to the dummy sub-pixel 20, and it is understood that the display pixel circuit 210 may have a structure as shown in fig. 8, the dummy pixel circuit 220 has a structure as shown in fig. 9, and in fig. 9, the dummy pixel circuit does not include the capacitance metal layer Cst, or the gate of the driving transistor T3 and the active layer are insulated, i.e. the metal Mn at the N1 node is removed, or the active layer Ma is removed, so as to finally ensure that the dummy sub-pixel does not Emit light, on one hand, the light transmittance is increased, and on the other hand, the remaining first signal lines (data line vdata, power supply voltage signal line PVDD) and the second signal lines (Scan line Scan, light emitting signal line Emit, and reference signal line Vref) may overlap, so as to generate a coupling capacitance, and compensate for the load on the signal lines where the dummy sub-pixel is located.
For example, referring to fig. 10, fig. 10 is a schematic diagram of a pixel circuit structure of fig. 9, where fig. 9 is a schematic diagram of a pixel circuit structure obtained by removing the active layer Ma, the capacitance metal layer Cst, and the N1 node metal, so that the transmittance can be maximized, and the remaining signal lines can generate coupling capacitance compensation loads.
Optionally, referring to fig. 11, fig. 11 is a schematic plan view of a display panel according to an embodiment of the present invention. Wherein the dummy sub-pixels 20 connected by the first sub-signal lines 31 further include third signal lines 50, the third signal lines 50 extending in the first direction Y; the third signal line 50 and the first sub-signal line 31 overlap in a direction perpendicular to a plane of the display panel; both ends of the third signal line 50 are arranged in a floating manner.
In this embodiment, when the first sub-signal line is a scan line, the third signal line is at least one of a data signal line and a power voltage signal line; when the first sub-signal line is a data line, the third signal line is at least one of a scan control signal line, a light-emitting control signal line and a reference signal line.
Optionally, with continued reference to fig. 11, the dummy sub-pixels connected by the third sub-signal lines further include a fourth signal line 60, and the fourth signal line 60 extends along the second direction X; the fourth signal line 60 and the third sub-signal line 41 overlap in a direction perpendicular to the plane of the display panel; both ends of the fourth signal line 60 are arranged in a floating manner.
The third signal line 50 and the first sub-signal line 31 are overlapped to form a coupling capacitor, so that the difference of the load capacitances of the first sub-signal line 31 and the second sub-signal line 32 is balanced to the greatest extent; the fourth signal line 60 and the third sub-signal line 41 are overlapped to form a coupling capacitor, so that the load capacitance difference between the third sub-signal line 41 and the fourth sub-signal line 42 is balanced to the maximum extent, the light sensing display area and the normal display area around the light sensing display area are prevented from being split, and the display effect is improved.
The invention also provides a display device comprising the display panel provided by the invention. Specifically, referring to fig. 12, fig. 12 is a schematic structural diagram of a display device according to an embodiment of the present invention, and the display device 200 shown in fig. 12 includes the display panel 100 according to the embodiment. It should be noted that fig. 12 illustrates a mobile phone as the display device 200, but the display device 200 is not limited to a mobile phone, and specifically, the display device 200 may include any display device or electronic device having a display function, such as a computer, a television, or a vehicle-mounted display, and the invention is not limited thereto.
The foregoing is a more detailed description of the invention in connection with specific preferred embodiments and it is not intended that the invention be limited to these specific details. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.
The foregoing is a more detailed description of the invention in connection with specific preferred embodiments and it is not intended that the invention be limited to these specific details. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.
Claims (15)
1. A display panel, comprising:
the display area comprises a light sensing display area and a first display area, and the light sensing display area and the first display area are arranged along a first direction;
the display area comprises a plurality of display sub-pixels, pixel circuits in the display sub-pixels drive the display sub-pixels to emit light and display pictures, the light sensing display area also comprises a plurality of virtual sub-pixels, and electric signals in the virtual sub-pixels are partially isolated;
the total density of the display sub-pixels and the virtual sub-pixels in the light sensing display area is less than that of the display sub-pixels in the first display area;
the display panel further comprises a plurality of first signal lines extending along a second direction and arranged along the first direction, the first signal lines comprise first sub-signal lines penetrating through the light sensing display area and second sub-signal lines penetrating through the first display area, the total number of the display sub-pixels and the virtual sub-pixels connected by the first sub-signal lines is n1, the number of the display sub-pixels connected by the second sub-signal lines is n2, n1 is K1 and n2, wherein K1 is not less than 0.99 and not more than 1.01, and the second direction intersects with the first direction.
2. The display panel according to claim 1, wherein the display area further comprises a second display area, and the light-sensing display area and the second display area are arranged along the second direction;
the display panel further comprises a plurality of second signal lines which extend along the first direction and are arranged along the second direction, and the second signal lines comprise third sub-signal lines which penetrate through the light sensing display area and fourth sub-signal lines which penetrate through the second display area;
the total number of the display sub-pixels and the virtual sub-pixels connected by the third sub-signal line is n3, the number of the display sub-pixels connected by the fourth sub-signal line is n4, n3 is K2 n4, and K2 is not less than 0.99 and not more than 1.01.
3. The display panel of claim 2, wherein the light-sensing display area comprises a plurality of display sub-pixel groups arranged in an array, and the display sub-pixel group comprises a plurality of display sub-pixels; the light sensing display area further comprises a plurality of virtual sub-pixel groups arranged in an array, and each virtual sub-pixel group comprises a first virtual sub-pixel group arranged along the second direction;
and a first virtual sub-pixel group is arranged between two adjacent display sub-pixel groups along the second direction.
4. The display panel according to claim 3,
the virtual sub-pixel group further comprises a second virtual sub-pixel group arranged along the first direction; and a second virtual sub-pixel group is arranged between two adjacent display sub-pixel groups along the first direction.
5. The display panel according to claim 3,
the total number of the display sub-pixels and the virtual sub-pixels connected to the first sub-signal line, to which the display sub-pixels of the display sub-pixel group are correspondingly connected, along the second direction is equal to the total number of the display sub-pixels connected to the second sub-signal line; and/or the presence of a gas in the gas,
the total number of the display sub-pixels and the virtual sub-pixels connected to the third sub-signal line, which is correspondingly connected to each display sub-pixel of the display sub-pixel group along the first direction, is equal to the total number of the display sub-pixels connected to the fourth sub-signal line.
6. The display panel according to claim 3, wherein the display sub-pixel group comprises a plurality of display sub-pixels arranged along the first direction and/or arranged along the second direction, and the plurality of display sub-pixels in the same display sub-pixel group comprises a first display sub-pixel;
the distance between two first display sub-pixels in two adjacent groups of the display sub-pixel groups along the first direction is d1, and the distance between two first display sub-pixels in two adjacent groups of the display sub-pixel groups along the second direction is d2, wherein d1 is d 2.
7. The display panel according to claim 6, wherein the display sub-pixel group includes a first color display sub-pixel, a second color display sub-pixel, and a third color display sub-pixel, the first color display sub-pixel and the second color display sub-pixel are arranged along the second direction, and the second color display sub-pixel and the third color display sub-pixel are arranged along the first direction.
8. The display panel according to claim 1, further comprising a substrate base, a pixel circuit layer on the substrate base, and a light emitting device layer on the pixel circuit layer;
the pixel circuit layer comprises an active layer, a grid layer, a metal capacitance layer and a source drain layer, and the light-emitting device layer comprises an anode layer, a light-emitting layer and a cathode layer;
the pixel circuit layer comprises a display pixel circuit connected with the display sub-pixel and a virtual pixel circuit connected with the virtual sub-pixel; the light emitting device layer includes a display device layer connected to the display sub-pixels in order to connect the virtual sub-pixels;
the display pixel circuit and the dummy pixel circuit have different structures, and the display device layer and the dummy device layer have different structures.
9. The display panel according to claim 8,
the display device layer includes a first anode at the anode layer, a first light emitting layer at the light emitting layer, and a first cathode at the cathode layer;
the dummy device layer includes a second anode electrode at the anode layer, a second cathode electrode at the cathode layer, and/or the dummy device layer includes a second cathode electrode at the cathode layer.
10. The display panel according to claim 8,
the display pixel circuit comprises a first active layer positioned on the active layer, a first grid positioned on the grid layer, and a first source electrode and a first drain electrode positioned on the source drain layer;
the display pixel circuit further comprises a first storage capacitor, wherein the first storage capacitor comprises a first electrode positioned on the gate electrode layer and a second electrode positioned on the metal capacitor layer;
the dummy pixel circuit comprises a first gate positioned on the gate layer, and a first source and a first drain positioned on the source drain layer, and/or the dummy pixel circuit does not comprise any storage capacitor.
11. The display panel according to claim 2,
the dummy sub-pixels connected by the first sub-signal lines further include third signal lines extending in the first direction; the third signal line and the first sub-signal line are overlapped along a direction perpendicular to the plane of the display panel; and two ends of the third signal line are arranged in a floating mode.
12. The display panel according to claim 2,
the dummy sub-pixels connected by the third sub-signal lines further include fourth signal lines extending in the second direction; the fourth signal line and the third sub-signal line are overlapped along a direction perpendicular to the plane of the display panel; and two ends of the fourth signal line are arranged in a floating mode.
13. The display panel according to claim 1, wherein the first signal line comprises a scan control signal line, a light emission control signal line, and a reference signal line.
14. The display panel according to claim 1, wherein the first signal line includes a data signal line and a power supply voltage signal line.
15. A display device, characterized in that it comprises a display panel according to any one of the preceding claims 1-14.
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| CN111048005B (en) * | 2020-01-06 | 2021-06-22 | 昆山国显光电有限公司 | Display panel and display device |
| CN111369941B (en) * | 2020-03-19 | 2021-04-27 | 武汉华星光电半导体显示技术有限公司 | Pixel circuit and display panel |
| CN111430433B (en) * | 2020-04-14 | 2023-05-19 | 京东方科技集团股份有限公司 | Display panel and display device |
| CN111599282B (en) | 2020-04-17 | 2021-12-14 | 昆山国显光电有限公司 | Display panel and display device |
| CN113745274B (en) * | 2020-05-29 | 2024-10-15 | 京东方科技集团股份有限公司 | Display substrate and display device |
| CN113838382B (en) | 2020-06-05 | 2023-01-31 | 京东方科技集团股份有限公司 | Display substrate and display device |
| CN113838383B (en) * | 2020-06-05 | 2023-02-03 | 京东方科技集团股份有限公司 | Display substrate and display device |
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| CN112002746B (en) * | 2020-08-31 | 2022-09-16 | 武汉天马微电子有限公司 | Display panel and display device |
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| CN114550652B (en) | 2020-11-27 | 2023-10-27 | 京东方科技集团股份有限公司 | Display substrate and display device |
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| CN113327517B (en) * | 2021-06-02 | 2022-09-16 | 昆山国显光电有限公司 | Display panel and display device |
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