CN110993680B - Flexible display panel and electronic equipment - Google Patents
Flexible display panel and electronic equipmentDownload PDFInfo
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- CN110993680B CN110993680BCN201911417919.XACN201911417919ACN110993680BCN 110993680 BCN110993680 BCN 110993680BCN 201911417919 ACN201911417919 ACN 201911417919ACN 110993680 BCN110993680 BCN 110993680B
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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
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
- G09F9/301—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements flexible foldable or roll-able electronic displays, e.g. thin LCD, OLED
- 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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Abstract
Description
Technical Field
The embodiment of the invention relates to a display technology, in particular to a flexible display panel and electronic equipment.
Background
Wearable equipment is directly worn on one's body promptly, or integrate to a portable equipment of user's clothes or accessory, and wearable equipment realizes powerful function through software support and data interaction, high in the clouds interaction, will bring very big transformation to our life, perception.
Present wearable equipment is mostly intelligent wrist-watch, mainly adopts organic light emitting display product. The display area of small-size intelligence wrist-watch is too little, and is inconvenient to look over, produces the folding product of jumbo size on this basis, can realize the size switch of display area around it is folding, is convenient for be used for looking over, but frequent folding causes equipment to buckle the damage easily, influences the display effect.
Disclosure of Invention
The embodiment of the invention provides a flexible display panel and electronic equipment, which are used for improving bending performance.
An embodiment of the present invention provides a flexible display panel, including:
a light emitting device layer including a plurality of light emitting devices;
the display device comprises a display area, a first pixel circuit layer and a second pixel circuit layer, wherein the display area comprises at least one first display area, at least one second display area, a bending area between the first display area and the second display area, and a first pixel circuit layer and a second pixel circuit layer, and the first pixel circuit layer is positioned between the light-emitting device layer and the second pixel circuit layer;
the first pixel circuit layer is arranged in the first display area and drives the light emitting device of the first display area, and the second pixel circuit layer is arranged in the first display area and drives the light emitting device of the second display area; or, the first pixel circuit layer and the second pixel circuit layer are disposed in the bending region and drive the light emitting device of the bending region.
An embodiment of the present invention further provides an electronic device, including the flexible display panel described above.
In the embodiment of the invention, the flexible display device can be bent in the bending area to enable the first display area and the second display area to be mutually attached or form a certain angle between the first display area and the second display area, so that the flexible display device is conveniently applied to wearable equipment or other folding equipment. In the embodiment of the invention, the first pixel circuit layer and the second pixel circuit layer are both arranged in the first display area, wherein the first pixel circuit layer drives the light-emitting device in the first display area to emit light, and/or the second pixel circuit layer drives the light-emitting device in the second display area to emit light, so that the display panel can be switched between a small-size display panel and a large-size display panel. In addition, the pixel circuit is not arranged in the bending area, so that the bending performance is improved, the pixel circuit damage caused by extrusion in the bending process is avoided, and the display effect of the display area is ensured to be normal.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a schematic diagram of a flexible display panel according to an embodiment of the present invention;
FIG. 2 is a cross-sectional view taken along A-A' of FIG. 1;
FIG. 3 is a schematic view of FIG. 1 in a folded state;
FIG. 4 is another schematic view of FIG. 1 in a folded state;
fig. 5 is a schematic diagram of a connection of the second pixel circuit and the light emitting device in fig. 1;
fig. 6 is a schematic diagram of the connection of the second pixel circuit and the light emitting device of fig. 1;
fig. 7 is a schematic diagram of a flexible display panel according to an embodiment of the present invention;
FIG. 8 is a schematic layout diagram of the pixel circuit in the bending region of FIG. 7;
FIG. 9 is a schematic diagram of the layout of the pixel circuit in the bending region of FIG. 7;
FIG. 10 is a schematic layout diagram of the pixel circuit in the bending region of FIG. 7;
fig. 11 is a schematic diagram of a flexible display panel according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described through embodiments with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. 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.
Referring to fig. 1, a flexible display panel according to an embodiment of the present invention is shown, and fig. 2 is a cross-sectional view taken along a-a' of fig. 1. The flexible display panel provided by the embodiment of the invention comprises: a light emitting device layer 1, the light emitting device layer 1 including a plurality oflight emitting devices 11; the display area 2, the display area 2 includes at least onefirst display area 21 andsecond display area 22 and abending area 23 located between thefirst display area 21 and thesecond display area 22, and also includes a firstpixel circuit layer 3 and a second pixel circuit layer 4, the firstpixel circuit layer 3 is located between the light-emitting device layer 1 and the second pixel circuit layer 4; the firstpixel circuit layer 3 is disposed in thefirst display region 21 and drives thelight emitting devices 11 of thefirst display region 21, and the second pixel circuit layer 4 is disposed in thefirst display region 21 and drives thelight emitting devices 11 of thesecond display region 22.
In this embodiment, the light emitting device layer 1 emits light to realize a display function. The light emitting device layer 1 includes a plurality oflight emitting devices 11 arranged in an array, the number of thelight emitting devices 11 is related to the resolution of the display panel, and the number of the light emitting devices in the display panel varies according to the required resolution of different products. In the display stage, the respectivelight emitting devices 11 in the light emitting device layer 1 display image content to realize a display function, and a display process and a principle of the display stage are not described herein. The light emitting device layer 1 includes at least threelight emitting devices 11 emitting different color spectra, and the optional light emitting device layer 1 includes a plurality of light emitting devices emitting a red color spectrum, a plurality of light emitting devices emitting a green color spectrum, and a plurality of light emitting devices emitting a blue color spectrum. In other embodiments, the light emitting device layer may further include light emitting devices with two or more different color spectrums, which is not limited in the present invention.
The selective flexible display panel is characterized in that organic light-emitting bodies directly emitting RGB three-color spectrums are respectively arranged in RGB three light-emitting device areas, the organic light-emitting body in the R light-emitting device area directly emits a red spectrum, the organic light-emitting body in the G light-emitting device area directly emits a green spectrum, and the organic light-emitting body in the B light-emitting device area directly emits a blue spectrum. In other embodiments, the display panel may further include a white organic light emitting layer and an RGB three-color filter disposed on the white organic light emitting layer.
In this embodiment, the display area 2 is divided into afirst display area 21, asecond display area 22 and abending area 23 located between thefirst display area 21 and thesecond display area 22, and each display area is a flexible display panel area covered by the display area. It can be understood that the plurality oflight emitting devices 11 of the light emitting device layer 1 are uniformly distributed, and the area covered by the light emitting devices is the display area 2, and the display area 2 can be folded in thebending area 23, and the foldedsecond display area 22 is attached to thefirst display area 21. Specifically, the display area 2 has alight emitting surface 2a, and the adhesion of thesecond display area 22 to thefirst display area 21 means that the light emitting surface of thesecond display area 22 is adhered to the light emitting surface of thefirst display area 21.
In this embodiment, the flexible display panel further includes a firstpixel circuit layer 3 and a second pixel circuit layer 4, the firstpixel circuit layer 3 is located between the light emitting device layer 1 and the second pixel circuit layer 4; the firstpixel circuit layer 3 is disposed in thefirst display region 21 and drives thelight emitting devices 11 of thefirst display region 21, the second pixel circuit layer 4 is disposed in thefirst display region 21 and drives thelight emitting devices 11 of thesecond display region 22, and the firstpixel circuit layer 3 and the second pixel circuit layer 4 are disposed in a stacked manner and are disposed in thefirst display region 21.
The firstpixel circuit layer 3 is used for driving thelight emitting devices 11 in thefirst display area 21, and obviously, the firstpixel circuit layer 3 includes a plurality of first pixel circuits, and thefirst display area 21 includes a plurality oflight emitting devices 11, and the plurality of first pixel circuits and the plurality oflight emitting devices 11 are respectively disposed and electrically connected. The output terminal of the first pixel circuit is directly electrically connected to the correspondinglight emitting device 11 in thefirst display region 21. The second pixel circuit layer 4 is used for driving thelight emitting devices 11 in thesecond display region 22, and obviously, the second pixel circuit layer 4 includes a plurality of second pixel circuits, and thesecond display region 22 includes a plurality oflight emitting devices 11, and the plurality of second pixel circuits are respectively disposed and electrically connected to the plurality oflight emitting devices 11. The output terminals of the second pixel circuits are led out from thefirst display area 21 by extension and electrically connected to the correspondinglight emitting devices 11 in thesecond display area 22.
The firstpixel circuit layer 3 and the second pixel circuit layer 4 may be structurally independent from each other, for example, their driving circuits are completely independent. There are various modes of controlling and driving the pixel circuit layer by the flexible display panel. Fig. 2 simply shows the position relationship between the first pixel circuit layer and the second pixel circuit layer, the first pixel circuit and the second pixel circuit have similar structures, and the light emitting principle and the process thereof are similar, and are not repeated herein.
It is understood that the bending region is further provided with a light emitting device, and the light emitting device of the bending region may be electrically connected to a plurality of first pixel circuits in the first pixel circuit layer, and/or the light emitting device of the bending region may be electrically connected to a plurality of second pixel circuits in the second pixel circuit layer, so that when the flexible display device is in the unfolded state, an overall image may be displayed. Obviously, the first pixel circuit layer may drive the light emitting devices of the first display area and the bending area, but not drive the light emitting devices of the second display area, and similarly, the second pixel circuit layer may drive the light emitting devices of the second display area and the bending area, but not drive the light emitting devices of the first display area.
Optionally, the first pixel circuit layer is disposed in the first display area and drives the light emitting device of the first display area, and the second pixel circuit layer is disposed in the first display area and drives the light emitting device of the second display area; in the folding display stage, the second display area is arranged in contact with the first display area, the second display area does not display and is switched into a transparent state to display in the first display area; in the unfolding display stage, the second display area, the bending area and the first display area are positioned on the same plane, and the second display area and the first display area are displayed simultaneously. The relevant film layers of the optional second display area are high-transmittance film layers so as to be switched between a transparent state or a display state.
Referring to fig. 2, the flexible display panel includes an unfolding display stage, the display area of the flexible display panel is a plane, and the firstpixel circuit layer 3 and the second pixel circuit layer 4 control thelight emitting device 11 in the display area 2 to emit light and display an image, thereby realizing large-size full-area display.
Referring to fig. 3, the flexible display panel includes a folding display stage, the flexible display panel may be folded in abending area 23, so that thefirst display area 21 and thesecond display area 22 are attached to each other, at this time, thesecond display area 22 of the flexible display panel is not displayed and is switched to a transparent state, and thelight emitting device 11 of thefirst display area 21 is controlled to emit light and display an image through the firstpixel circuit layer 3, so that small-size single-sided display is achieved. It is understood that if the first pixel circuit layer is also electrically connected to at least one light emitting device in the bending region, the light emitting device of the bending region also displays an image.
Referring to fig. 4, the flexible display panel includes a folding display stage, where the flexible display panel may be folded in abending region 23, so that a right angle or other non-0 angle is formed between thefirst display region 21 and thesecond display region 22, and at this time, the flexible display panel controls thelight emitting device 11 of thefirst display region 21 to emit light and display an image through the firstpixel circuit layer 3, or controls thelight emitting device 11 of thesecond display region 22 to emit light and display an image through the second pixel circuit layer 4, so as to implement small-size single-sided display; alternatively, thelight emitting devices 11 of the display region 2 are controlled to emit light and display an image by the firstpixel circuit layer 3 and the second pixel circuit layer 4, thereby realizing large-size full-screen display in a bent state.
In other embodiments, the first display area and the second display area may have different display structures, and the first display area and the second display area can be bent and attached to achieve stereoscopic display.
In this embodiment, the flexible display device can be bent in the bending area to enable the first display area and the second display area to be mutually attached or form a certain angle therebetween, so that the flexible display device can be conveniently applied to wearable equipment or other folding equipment. In this embodiment, the first pixel circuit layer and the second pixel circuit layer are both disposed in the first display area, wherein the first pixel circuit layer drives the light emitting device in the first display area to emit light, and/or the second pixel circuit layer drives the light emitting device in the second display area to emit light, so that the display panel can be switched between a small-size display panel and a large-size display panel. In addition, the pixel circuit is not arranged in the bending area, so that the damage of the pixel circuit caused by extrusion during bending is avoided, and the display effect of the display area is ensured to be normal.
Alternatively, referring to fig. 5, thelight emitting device 11 includes afirst electrode 11a, a light emittingmaterial layer 11b, and asecond electrode 11c, and the plurality of light emittingdevices 11 of thesecond display region 22 share thesecond electrode 11 c; the firstpixel circuit layer 3 includes a plurality offirst pixel circuits 31, the second pixel circuit layer 4 includes a plurality ofsecond pixel circuits 41, and output terminals of thesecond pixel circuits 41 are electrically connected to thefirst electrodes 11a of the corresponding light emittingdevices 11. Thelight emitting device 11 may further include a hole function layer disposed between thefirst electrode 11a and the light emittingmaterial layer 11b for improving the injection efficiency of the holes of thefirst electrode 11a into the light emittingmaterial layer 11b, and thelight emitting device 11 further includes an electron function layer disposed between thesecond electrode 11c and the light emittingmaterial layer 11b for improving the injection efficiency of the electrons of thesecond electrode 11c into the light emittingmaterial layer 11b, thereby improving the light emitting efficiency. The optional hole functional layer comprises at least one film layer of a hole transport layer, a hole injection layer and an electron blocking layer, and the electronic functional layer comprises at least one film layer of an electron transport layer, an electron injection layer and a hole blocking layer.
Thesecond electrode 11c of thelight emitting device 11 is a cathode, and is usually a whole-surface electrode, all the light emittingdevices 11 are shared, thefirst electrode 11a of thelight emitting device 11 is an anode, and is usually a block-shaped electrode, the anodes of differentlight emitting devices 11 are independent and insulated from each other, and the output terminal of one pixel circuit is electrically connected to the anode of onelight emitting device 11. When a voltage is applied to the cathode and a voltage is applied to the anode of the targetlight emitting device 11, holes of the anode and electrons of the cathode in the targetlight emitting device 11 are injected into the light emittingmaterial layer 11b to make the light emittingmaterial layer 11b electroluminesce.
In this embodiment, thesecond pixel circuit 41 is located in thefirst display region 21 and electrically connected to thelight emitting device 11 of thesecond display region 22, so that the output terminal of thesecond pixel circuit 41 is electrically connected to thefirst electrode 11a of the corresponding light emittingdevice 11 through a connection line. The output terminal of the optionalsecond pixel circuit 41 extends in a curved shape or a spiral shape and is electrically connected to thefirst electrode 11a of the corresponding light emittingdevice 11.
Alternatively, referring to fig. 6, the bendingregion 23 includes aconnection film layer 6, where theconnection film layer 6 has a plurality of transmission lines arranged in an insulating manner, and the plurality of transmission lines and the plurality ofsecond pixel circuits 41 are respectively arranged correspondingly; a first end of the transmission line is electrically connected to an output end of one of thesecond pixel circuits 41, and a second end of the transmission line is electrically connected to thefirst electrode 11a of thelight emitting device 11 corresponding to thesecond pixel circuit 41.
In this embodiment, thesecond pixel circuit 41 is connected to the corresponding light emittingdevice 11 through theconnection film layer 6, and the output terminal lead of thesecond pixel circuit 41 is short, and will not break when bending, and theconnection film layer 6 has large stress, which can effectively prevent the transmission line from breaking, thereby prolonging the service life of the flexible display panel.
Referring to fig. 7, another flexible display panel according to an embodiment of the present invention is shown, and fig. 7 is a cross-sectional view taken along a-a' of fig. 1. The flexible display panel provided by the embodiment of the invention comprises: a light emitting device layer 1, the light emitting device layer 1 including a plurality of light emittingdevices 11; the display area 2, the display area 2 includes at least onefirst display area 21 andsecond display area 22 and a bendingarea 23 located between thefirst display area 21 and thesecond display area 22, and also includes a firstpixel circuit layer 3 and a second pixel circuit layer 4, the firstpixel circuit layer 3 is located between the light-emitting device layer 1 and the second pixel circuit layer 4; the firstpixel circuit layer 3 and the second pixel circuit layer 4 are disposed at the bendingregion 23 and drive thelight emitting device 11 of the bendingregion 23.
The same structure of the flexible display panel shown in fig. 7 and fig. 2 is not described in detail here. In the flexible display panel shown in fig. 7, the bendingregion 23 is provided with two pixel circuit layers, namely a firstpixel circuit layer 3 and a second pixel circuit layer 4, the firstpixel circuit layer 3 is used for driving part of thelight emitting devices 11 in the bendingregion 23, and the second pixel circuit layer 4 is used for driving the rest of thelight emitting devices 11 in the bendingregion 23.
In this embodiment, the display region 2 further includes afirst display region 21 and asecond display region 22, and thefirst display region 21 and thesecond display region 22 may be selected to be of a single-layer structure, for example, the firstpixel circuit layer 3 is further located in thefirst display region 21 to be electrically connected to each light emittingdevice 11 of thefirst display region 21, and the firstpixel circuit layer 3 is further located in thesecond display region 22 to be electrically connected to each light emittingdevice 11 of thesecond display region 22.
It is understood that the firstpixel circuit layer 3 includes a plurality of first pixel circuits, which are respectively disposed and electrically connected to thelight emitting devices 11 of the bendingregion 23, and specifically, the output terminals of the first pixel circuits are directly electrically connected to the corresponding light emittingdevices 11. The second pixel circuit layer 4 includes a plurality of second pixel circuits, the second pixel circuits are disposed and electrically connected to the remaining light emittingdevices 11 of the bendingregion 23, and specifically, the output ends of the second pixel circuits extend in a bending manner and are electrically connected to the corresponding light emittingdevices 11 through the firstpixel circuit layer 3.
The flexible display panel can be folded in the bendingarea 23, so that a right angle or other non-0 angle is formed between thefirst display area 21 and thesecond display area 22, at this time, the flexible display panel controls thelight emitting device 11 of the bendingarea 23 to emit light and display an image through the firstpixel circuit layer 3 and the second pixel circuit layer 4, and the flexible display panel also controls thelight emitting device 11 of thefirst display area 21 and thesecond display area 22 to emit light through other pixel circuits, so that normal display of the display area 2 is realized.
Firstpixel circuit layer 3 and second pixel circuit layer 4 are located different layers, so the interval of two adjacent pixel circuits of bendingregion 23 on flexible display panel horizontal direction can be accomplished comparatively big, can avoid the extrusion between two adjacent pixel circuits when buckling, solved the pixel circuit damage problem that the extrusion caused between the base plate, guaranteed that the display effect in display area is normal. In addition, the pixel circuits in the bending region are divided into two layers, in other embodiments, the pixel circuits are located in the same layer, so that the thickness of the bending region is locally increased, but the thickness of the whole display panel is not increased after bending. The flexible display panel that this embodiment provided not only is applicable to the intelligent terminal screen, can also be used to other flexible equipment, like multiaspect screen electronic alarm clock, multiaspect screen electronic album multiaspect dysmorphism display screen such as.
Optionally, the first pixel circuit layer and the second pixel circuit layer are both disposed in the bending region, the first pixel circuit layer includes a plurality of first pixel circuits, and the second pixel circuit layer includes a plurality of second pixel circuits; the first pixel circuit and the second pixel circuit are arranged at intervals and do not overlap in orthographic projection of the plane where the light-emitting device layer is located.
Referring to fig. 7 and 8, thefirst pixel circuits 31 and thesecond pixel circuits 41 do not overlap in the orthogonal projection of the plane where the light emitting device layer 1 is located and are spaced apart in the first direction, then the distance between twofirst pixel circuits 31 adjacently located in the first direction in the bendingregion 23 is at least larger than the size of one pixel circuit, when the second direction is taken as the bending axis, the extrusion between two adjacentfirst pixel circuits 31 in the same layer can be avoided, and similarly, the distance between two adjacentsecond pixel circuits 41 in the bendingregion 23 along the first direction is at least larger than the size of one pixel circuit, when the second direction is taken as the bending axis for bending, extrusion between two adjacentsecond pixel circuits 41 on the same layer can be avoided, the problem of pixel circuit damage caused by extrusion between substrates is solved, and the normal display effect of the bending area of the display area is ensured.
Optionally, the plurality of first pixel circuits of the first pixel circuit layer and the plurality of second pixel circuits of the second pixel circuit layer are arranged in an array in the orthographic projection of the light emitting device layer; the pixel circuits in the same row in the orthographic projection of the plane where the light-emitting device layer is located belong to the same pixel circuit layer, and the pixel circuits in two adjacent rows in the orthographic projection of the plane where the light-emitting device layer is located belong to different pixel circuit layers; or the pixel circuits in the same column of the orthographic projection of the plane in which the light-emitting device layer is located belong to the same pixel circuit layer, and the pixel circuits in the two adjacent columns of the orthographic projection of the plane in which the light-emitting device layer is located belong to different pixel circuit layers; or two pixel circuits which are adjacently arranged in the orthographic projection of the plane where the light-emitting device layer is located belong to different pixel circuit layers.
Fig. 8 is a schematic diagram showing orthographic projections of the first pixel circuit layer and the second pixel circuit layer on a plane where the light emitting device layer is located. It should be apparent that the first direction is a row direction, and the second direction is a column direction, and the plurality offirst pixel circuits 31 of the firstpixel circuit layer 3 are divided into a multi-column arrangement, the plurality ofsecond pixel circuits 41 of the second pixel circuit layer 4 are divided into a multi-column arrangement, and columns of thefirst pixel circuits 31 and columns of thesecond pixel circuits 41 are distributed at intervals in the row direction. Thefirst pixel circuit 31 and thesecond pixel circuit 41 are located in different pixel circuit layers, and thus no compression occurs between thefirst pixel circuit 31 and thesecond pixel circuit 41. The distance between two adjacent columns offirst pixel circuits 31 is at least larger than the size of one second pixel circuit 42, so that the extrusion between two adjacentfirst pixel circuits 31 in the row direction can be avoided when the column direction is taken as a bending shaft for bending, and similarly, the extrusion between two adjacentsecond pixel circuits 41 in the row direction can be avoided when the column direction is taken as the bending shaft for bending, so that the problem of pixel circuit damage caused by extrusion between substrates is solved, and the normal display effect of the bending area of the display area is ensured.
As shown in fig. 9, the plurality offirst pixel circuits 31 of the firstpixel circuit layer 3 are arranged in a plurality of rows, the plurality ofsecond pixel circuits 41 of the second pixel circuit layer 4 are arranged in a plurality of rows, and the rows of thefirst pixel circuits 31 and the rows of thesecond pixel circuits 41 are spaced apart in the column direction. Thefirst pixel circuit 31 and thesecond pixel circuit 41 are located in different pixel circuit layers, and thus no compression occurs between thefirst pixel circuit 31 and thesecond pixel circuit 41. The distance between two adjacent rows offirst pixel circuits 31 is at least larger than the size of one second pixel circuit 42, so that the extrusion between the same layer and two adjacentfirst pixel circuits 31 can be avoided when the column direction is taken as the bending axis for bending, and similarly, the extrusion between the same layer and two adjacentsecond pixel circuits 41 can be avoided when the column direction is taken as the bending axis for bending, thereby solving the problem of pixel circuit damage caused by extrusion between substrates and ensuring the normal display effect of the bending area of the display area.
As shown in fig. 10, the pixel circuits adjacent to thefirst pixel circuit 31 are all the second pixel circuits. Thefirst pixel circuit 31 and thesecond pixel circuit 41 are located in different pixel circuit layers, and thus no compression occurs between thefirst pixel circuit 31 and thesecond pixel circuit 41. This flexible display panel can be followed arbitrary direction and buckled in the district of buckling, then the interval between two adjacentfirst pixel circuits 31 is greater than a second pixel circuit 42's size at least, can avoid the extrusion between two adjacentfirst pixel circuits 31 with the layer when buckling so, and on the same way, also can avoid the extrusion between two adjacentsecond pixel circuits 41, the pixel circuit damage problem that the extrusion led to the fact between the base plate has been solved, the bending property has been improved, the district of buckling display effect of having guaranteed the display area is normal, arbitrary curved surface screen has been realized.
It is understood that the pressing force between the adjacent pixel circuits in the bending axis direction is very small and negligible.
Optionally, as shown in fig. 11, the flexible display panel further includes: a first substrate 5 on which the pixel circuit is located 5; thefirst pixel circuits 31 of the first pixel circuit layer are disposed on the first substrate 5 through thepads 51, and thesecond pixel circuits 41 of the second pixel circuit layer are disposed on the first substrate 5.
In this embodiment, the first substrate 5 of the flexible display panel is a flexible material layer, the first substrate 5 may be a polyimide substrate with good ductility, and in other embodiments, the first substrate may also be a flexible material substrate suitable for application in a display panel, such as an organic film with good ductility, without being limited thereto. The first substrate 5 is provided with apad 51, thefirst pixel circuit 31 is provided on thesubstrate 51, and thesecond pixel circuit 41 is provided on the first substrate 5, so that thefirst pixel circuit 31 and thesecond pixel circuit 41 are located on planes having different heights, and the first pixel circuit layer and the second pixel circuit layer are formed on different layers.Optional liner 51 is integrally formed on first substrate 5, and in other embodiments, the first substrate and liner may optionally be formed separately. Therefore, under the condition of ensuring high PPI, the distance between the pixel circuits on the same layer is increased, so that the pixel circuits are prevented from being damaged by extrusion between the substrates during bending, and the bending performance is improved.
Optionally, as shown in fig. 11, the pixel circuit includes a thin film transistor, where the thin film transistor includes a source/drain and a gate; the source-drain metal layer of thefirst pixel circuit 31 and the source-drain metal layer of thesecond pixel circuit 41 are manufactured by the same process, and the gate metal layer of thefirst pixel circuit 31 and the gate metal layer of thesecond pixel circuit 41 are manufactured by the same process.
In the present embodiment, the source and drain metal layers of thefirst pixel circuit 31 and thesecond pixel circuit 41 may be selected by using the same process, and the gate metal layer of thefirst pixel circuit 31 and the gate metal layer of thesecond pixel circuit 41 are manufactured by using the same process.
Optionally, thelight emitting device 11 includes afirst electrode 11a, a light emittingmaterial layer 11b, and asecond electrode 11c, and the plurality of light emittingdevices 11 in the bending region share thesecond electrode 11 c; the output end of thesecond pixel circuit 41 is bent and extended and electrically connected to thefirst electrode 11a of the corresponding light emittingdevice 11.
In this embodiment, thefirst pixel circuit 31 is located on thepad 51, thesecond pixel circuit 41 is located on the first substrate 5, and thefirst pixel circuit 31 and thesecond pixel circuit 41 are disposed at an interval, so that when the output terminal of thesecond pixel circuit 41 is electrically connected to thefirst electrode 11a of the corresponding light emittingdevice 11, the connection can be bent and extended, for example, thefirst electrode 11a is electrically connected to the output terminal of the corresponding pixel circuit in a spiral or curved shape. The output end lead of thesecond pixel circuit 41 is bent and extended, so that the flexible display panel has better ductility and is not easy to break, and the service life of the flexible display panel is prolonged.
The flexible display panel provided by the embodiment of the invention can be suitable for display panels with different bending forms, wherein the flexible display panel can comprise a plurality of first display areas and second display areas, and a bending area is arranged between the adjacent first display areas and the second display areas; or, the whole surface of the flexible display panel is a bending area. The pixel circuit structure of the bending area of the flexible display panel is of a double-layer structure, the distance between two adjacent pixel circuits on the same layer is large when the flexible display panel is bent, so that the extrusion force is small, the bending performance is improved, the problem that the panel cannot be restored to be damaged due to extrusion when the flexible display panel is bent is also solved, and the product yield and the display effect are improved.
Based on the same inventive concept, embodiments of the present invention further provide an electronic device, which includes the flexible display panel according to any of the above embodiments. The electronic device can be selected as a smart watch, a smart phone, a multi-screen electronic alarm clock and the like, and is not particularly limited in the present invention. It can be understood that the drawings shown in the above embodiments are only simple schematic diagrams of the flexible display panel, and the structure of the flexible display panel substantially includes other film layers, which are not described and defined herein.
The electronic device provided by the embodiment integrates the flexible display panel described in the above embodiments, has a function of switching the display area of the size at will, and can also improve the bending performance, improve the problems of substrate damage and the like caused by bending extrusion, and improve the display effect.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious modifications, rearrangements, combinations and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (9)
1. A flexible display panel, comprising:
a light emitting device layer including a plurality of light emitting devices;
the display device comprises a display area, a first pixel circuit layer and a second pixel circuit layer, wherein the display area comprises at least one first display area, at least one second display area, a bending area between the first display area and the second display area, and a first pixel circuit layer and a second pixel circuit layer, and the first pixel circuit layer is positioned between the light-emitting device layer and the second pixel circuit layer;
the first pixel circuit layer is arranged in the first display area and drives the light emitting device of the first display area, and the second pixel circuit layer is arranged in the first display area and drives the light emitting device of the second display area; or the first pixel circuit layer and the second pixel circuit layer are both arranged in the bending region and drive the light-emitting device of the bending region, the first pixel circuit layer comprises a plurality of first pixel circuits, and the second pixel circuit layer comprises a plurality of second pixel circuits;
the orthographic projections of the first pixel circuit and the second pixel circuit on the plane where the light-emitting device layer is located are not overlapped and are arranged at intervals.
2. The flexible display panel of claim 1, wherein the plurality of first pixel circuits of the first pixel circuit layer and the plurality of second pixel circuits of the second pixel circuit layer are arranged in an array in an orthographic projection of the light emitting device layer; wherein,
the pixel circuits in the same row in the orthographic projection of the plane where the light-emitting device layer is located belong to the same pixel circuit layer, and the pixel circuits in two adjacent rows in the orthographic projection of the plane where the light-emitting device layer is located belong to different pixel circuit layers; or the pixel circuits in the same column of the orthographic projection of the plane where the light-emitting device layer is located belong to the same pixel circuit layer, and the pixel circuits in the two adjacent columns of the orthographic projection of the plane where the light-emitting device layer is located belong to different pixel circuit layers; or two pixel circuits which are adjacently arranged in the orthographic projection of the plane where the light-emitting device layer is located belong to different pixel circuit layers.
3. The flexible display panel of claim 1, further comprising: a first substrate on which the pixel circuit is located;
the first pixel circuits of the first pixel circuit layer are disposed on the first substrate through pads, and the second pixel circuits of the second pixel circuit layer are disposed on the first substrate.
4. The flexible display panel of claim 3, wherein the pixel circuit comprises a thin film transistor comprising a source drain and a gate;
the source and drain metal layers of the first pixel circuit and the source and drain metal layers of the second pixel circuit are manufactured by the same process, and the grid metal layer of the first pixel circuit and the grid metal layer of the second pixel circuit are manufactured by the same process.
5. The flexible display panel according to claim 3, wherein the light emitting device comprises a first electrode, a light emitting material layer, and a second electrode, and the second electrode is shared by a plurality of light emitting devices of the bending region;
the output end of the second pixel circuit is bent and extended and is electrically connected with the first electrode of the corresponding light-emitting device.
6. The flexible display panel according to claim 1, wherein the first pixel circuit layer is provided in the first display region and drives a light emitting device of the first display region, and wherein the second pixel circuit layer is provided in the first display region and drives a light emitting device of the second display region;
in the folding display stage, the second display area is arranged in contact with the first display area, the second display area does not display and is switched into a transparent state to display in the first display area;
in the unfolding display stage, the second display area, the bending area and the first display area are positioned on the same plane, and the second display area and the first display area are displayed simultaneously.
7. The flexible display panel according to claim 6, wherein the light-emitting device comprises a first electrode, a light-emitting material layer, and a second electrode, and the second electrode is shared by a plurality of light-emitting devices of the second display region;
the first pixel circuit layer comprises a plurality of first pixel circuits, the second pixel circuit layer comprises a plurality of second pixel circuits, and output ends of the second pixel circuits are electrically connected with the first electrodes of the corresponding light-emitting devices.
8. The flexible display panel according to claim 7, wherein the bending region includes a connection film layer having a plurality of transmission lines provided in an insulating manner, the plurality of transmission lines being provided corresponding to the plurality of second pixel circuits, respectively;
a first end of the transmission line is electrically connected to an output end of one of the second pixel circuits, and a second end of the transmission line is electrically connected to a first electrode of the light emitting device corresponding to the second pixel circuit.
9. An electronic device, characterized in that it comprises a flexible display panel according to any one of claims 1-8.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911417919.XACN110993680B (en) | 2019-12-31 | 2019-12-31 | Flexible display panel and electronic equipment |
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| CN201911417919.XACN110993680B (en) | 2019-12-31 | 2019-12-31 | Flexible display panel and electronic equipment |
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| CN110993680Btrue CN110993680B (en) | 2022-06-17 |
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| CN112909056B (en)* | 2021-01-26 | 2023-08-08 | 京东方科技集团股份有限公司 | Display panel, manufacturing method thereof and display device |
| CN113066841B (en)* | 2021-03-23 | 2024-05-24 | 京东方科技集团股份有限公司 | Display substrate and manufacturing method thereof |
| CN113299730B (en)* | 2021-06-30 | 2025-08-05 | 京东方科技集团股份有限公司 | Display panel and display device |
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| CN107293570B (en)* | 2017-05-12 | 2019-10-22 | 上海天马微电子有限公司 | Display panel and display device |
| KR102591811B1 (en)* | 2018-05-18 | 2023-10-23 | 삼성디스플레이 주식회사 | Thin film transistor substrate, method of manufacturing the same, and display device including the same |
| CN108648631B (en)* | 2018-06-14 | 2020-10-20 | 昆山国显光电有限公司 | Flexible display panel and display device |
| CN109326633B (en)* | 2018-09-30 | 2022-01-28 | 厦门天马微电子有限公司 | Display panel and display device |
| CN109671721A (en)* | 2018-12-10 | 2019-04-23 | 武汉华星光电半导体显示技术有限公司 | Display device and its manufacturing method |
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