CN111244148B - Display panel and display device - Google Patents
Display panel and display device Download PDFInfo
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- CN111244148B CN111244148B CN202010200567.9A CN202010200567A CN111244148B CN 111244148 B CN111244148 B CN 111244148B CN 202010200567 A CN202010200567 A CN 202010200567A CN 111244148 B CN111244148 B CN 111244148B
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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
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/10—OLED displays
- H10K59/12—Active-matrix OLED [AMOLED] displays
- H10K59/131—Interconnections, e.g. wiring lines or terminals
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Abstract
The invention discloses a display panel and a display device, wherein the display panel comprises a display area and a non-display area surrounding the display area, the display area comprises a plane display area and at least one bent display area, the display area also comprises a plurality of pixel units, the pixel units comprise a first pixel unit positioned in the plane display area and a second pixel unit positioned in the bent display area, and also comprise a cathode layer and a power signal wire; the cathode layer comprises at least one cathode block; the power supply signal lines include a cathode power supply signal line for supplying a cathode power supply signal to the cathode layer, a first anode power supply signal line for supplying a first anode power supply signal to the first pixel unit, and a second anode power supply signal line for supplying a second anode power supply signal to the second pixel unit; the absolute value of the power supply difference between the first anode power supply signal and the cathode power supply signal is smaller than the absolute value of the power supply difference between the second anode power supply signal and the cathode power supply signal. The invention can improve the color brightness uniformity of the display panel and improve the display effect.
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
As the user demands for the display effect of the display panel become higher, the display panel is also being developed from a general rectangular flat display panel into a display panel with more shapes and structures. In any case, the brightness attenuation of the pixels in the display regions at different bending angles is different, which may result in poor uniformity of the display panel.
Disclosure of Invention
In view of this, the present invention provides a display panel and a display device, which change the voltage difference between the anode voltage and the cathode voltage in the display areas with different bending angles to solve the problem of the brightness attenuation difference between different bending angles.
In one aspect, the invention provides a display panel, which comprises a display area and a non-display area surrounding the display area, wherein the display area comprises a planar display area and at least one bent display area, the bent display area is positioned between the planar display area and the non-display area, and the bent display area is bent towards a direction back from a light-emitting surface of the planar display area;
the display area also comprises a plurality of pixel units, each pixel unit comprises a first pixel unit and a second pixel unit, the first pixel unit is positioned in the plane display area, and the second pixel unit is positioned in the bent display area;
further comprising a cathode layer and a power signal line;
the cathode layer comprises at least one cathode block;
the power supply signal lines include a cathode power supply signal line for supplying a cathode power supply signal to the cathode layer, a first anode power supply signal line for supplying a first anode power supply signal to the first pixel unit, and a second anode power supply signal line for supplying a second anode power supply signal to the second pixel unit;
the absolute value of the power supply difference between the first anode power supply signal and the cathode power supply signal is smaller than the absolute value of the power supply difference between the second anode power supply signal and the cathode power supply signal.
In another aspect, the present invention provides a display device, including any one of the display panels described above.
Compared with the prior art, the display panel and the display device provided by the invention at least realize the following beneficial effects:
the absolute value of the power supply difference value of the first anode power supply signal and the cathode power supply signal in the plane display area of the display panel and the display device is smaller than the absolute value of the power supply difference value of the second anode power supply signal and the cathode power supply signal in the bending display area, and the brightness attenuation degree in the bending display area is larger than that of the plane display area, so that the color brightness uniformity of the plane display area and the bending display area of the display panel can be improved after the absolute value of the power supply difference value of the first anode power supply signal and the cathode power supply signal in the plane display area is smaller than that of the second anode power supply signal and the cathode power supply signal in the bending display area, and the display effect is improved.
Of course, it is not necessary for any product in which the present invention is practiced to specifically achieve all of the above technical effects simultaneously.
Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments of the invention, which proceeds with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.
FIG. 1 is a schematic diagram of a display panel in a planar expanded structure in the prior art;
FIG. 2 is a schematic diagram of a display panel according to the present invention;
FIG. 3 is a cross-sectional view taken along line N-N' of FIG. 2;
FIG. 4 is a schematic view of a planar expanded structure of another display panel provided by the present invention;
FIG. 5 is a schematic diagram of a planar expanded structure of another display panel provided by the present invention;
FIG. 6 is a schematic diagram of a planar expanded structure of another display panel provided by the present invention;
FIG. 7 is a schematic diagram of a planar expanded structure of another display panel provided by the present invention;
FIG. 8 is a schematic diagram of a planar expanded structure of another display panel provided by the present invention;
FIG. 9 is a cross-sectional view taken along line M-M' of FIG. 8;
FIG. 10 is a schematic view of a planar expanded structure of another display panel provided by the present invention;
FIG. 11 is a schematic diagram of a planar expanded structure of another display panel provided by the present invention;
FIG. 12 is a schematic diagram of a planar expanded structure of another display panel provided by the present invention;
FIG. 13 is a schematic diagram of a planar expanded structure of another display panel provided by the present invention;
FIG. 14 is a cross-sectional view taken along line K-K' of FIG. 11;
fig. 15 is a schematic diagram of a display device according to the present invention.
Detailed Description
Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.
The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.
Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail, but are intended to be part of the specification where appropriate.
In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
In the related art, fig. 1 is a schematic plan view of a display panel in the related art. As shown in fig. 1, a display panel 100 provided in the related art includes: the display area 01 comprises a plane display area 03 and a bending display area 04, the bending display area 04 is positioned between the plane display area 03 and the non-display area 02, and the bending display area 04 is bent towards the direction away from the light-emitting surface of the plane display area 03; the display area 01 further includes a plurality of pixel units 05; the display panel 100 further includes a cathode layer (not shown), an anode power signal line and a cathode power signal line (not shown), and when the display panel 100 displays, the same anode power signal is transmitted to the pixel unit through the anode power signal line 06, and the cathode power signal is transmitted to the cathode layer through the cathode power signal line (not shown).
The flat display area 03 and the bent display area 04 in the display panel 100 are both controlled by the same anode power signal and the same cathode power signal, but because the brightness attenuation degrees of the flat display area 03 and the bent display area 04 are different, the brightness attenuation degree of the bent display area 04 observed at the same viewing angle is more serious than that of the flat display area 03, which may cause the bent display area 04 to be darker than the flat display area 03 under the action of the same anode power signal and the same cathode power signal, resulting in poor brightness uniformity of the display panel 100.
In order to solve the problem of brightness uniformity of the display panel and further improve the display effect of the display panel, the inventors have conducted the following studies on the display panel in the related art: the invention provides a display panel. As for a display panel provided by the present invention, the following will be described in detail.
Fig. 2 is a schematic plane-expanded structure diagram of a display panel provided by the present invention, fig. 3 is a cross-sectional view taken along the direction N-N' in fig. 2, and in conjunction with fig. 2 and fig. 3, a display panel 200 includes: the display area AA comprises a plane display area 1 and at least one bending display area 2, the bending display area 2 is positioned between the plane display area 1 and the non-display area BB, and the bending display area 2 is bent towards the direction back to the light-emitting surface of the plane display area 1; the display area AA further includes a plurality of pixel units 3, each pixel unit 3 includes a first pixel unit 31 and a second pixel unit 32, the first pixel unit 31 is located in the flat display area 1, and the second pixel unit 32 is located in the bend display area 2; further comprising a cathode layer 4 and power signal lines 5; the cathode layer 4 comprises at least one cathode block 41; the power supply signal line 5 includes a cathode power supply signal line 44 that supplies a cathode power supply signal to the cathode layer 4, a first anode power supply signal line 51 that supplies a first anode power supply signal to the first pixel unit 31, and a second anode power supply signal line 52 that supplies a second anode power supply signal to the second pixel unit 32; the absolute value of the power supply difference between the first anode power supply signal and the cathode power supply signal is smaller than the absolute value of the power supply difference between the second anode power supply signal and the cathode power supply signal.
Since a part of the display panel can fully embody the present invention, fig. 2 only illustrates a partial structural schematic diagram of the display panel 200 in order to clearly show the structural relationship between the bending display region 2 and the flat display region 1.
With continued reference to fig. 3, the display panel 200 includes a pixel circuit layer 6, an anode layer 7, a pixel defining layer 8, a light emitting layer 9, and a cathode layer 4, which are sequentially stacked, wherein the anode layer 7 may be formed of various conductive materials, a transparent anode layer or a reflective anode layer may be formed according to his usage, when the anode layer 7 is formed as the transparent anode layer, the anode layer 7 may include Indium Tin Oxide (ITO), Indium Zinc Oxide (IZO), zinc oxide (ZnO), indium oxide (In2O3), or the like, when the anode layer 7 is formed as the reflective anode layer, the anode layer 7 may be formed of Ag, magnesium (Mg), Al, Pt, Pd, Au, Ni, Nd, iridium (Ir), Cr, or a mixture thereof, and ITO, IZO, ZnO, In2O3, or the like may be formed on the reflective anode layer. The pixel defining layer 8 defines an emission area of each pixel unit. The pixel defining layer 8 may be formed of an organic material such as Polyimide (PI), polyamide, benzocyclobutene (BCB), acryl resin, or phenol resin. The light emitting layer 9 is located on the anode layer 7, and the portion of the anode layer 7 on which the light emitting layer 9 is located is not covered with the pixel defining layer 8 and is exposed. The light emitting layer 9 may be formed by a vapor deposition process, and the light emitting layer 9 is patterned to correspond to each pixel unit. The light emitting layer 9 may be formed of a low molecular weight organic material or a high molecular weight organic material, and the cathode layer 4 is positioned on the light emitting layer 9. Similar to the anode layer 7, the cathode layer 4 may be formed as a transparent cathode layer or a reflective cathode layer, the anode layer 7 and the cathode layer 4 are insulated from each other by the light emitting layer 9, and when the display panel 200 displays, the same anode power signal is transmitted to the pixel unit 3 by the anode power signal line 51, and the cathode power signal is transmitted to the cathode layer 4 by the cathode power signal line 52, that is, a voltage is applied between the anode layer 7 and the cathode layer 4, and the light emitting layer 9 emits visible light, thereby implementing an image that can be recognized by a user. When the cathode layer 4 is formed as a transparent cathode layer, a compound having a small work function such as lithium (Li), calcium (Ca), lithium fluoride/calcium (LiF/Ca), lithium fluoride/aluminum (LiF/Al), aluminum (Al), magnesium (Mg), or a combination thereof may be initially deposited on the light-emitting layer 9 by evaporation, and a transparent cathode layer forming material such as ITO, IZO, ZnO, or In2O3 may be deposited on the compound. When the cathode layer 4 is formed as a reflective cathode layer, the cathode layer 4 may be formed by evaporating Li, Ca, LiF/Al, Mg or a mixture thereof.
It can be understood that, in the prior art, the signals of the flat display area and the bent display area are consistent, which results in lower brightness of the bent display area and poor uniformity of the display panel, but in the present invention, the first anode power signal line 51 and the second anode power signal line 52 of the display panel 200 are respectively used as the anode power signals of the flat display area 1 and the bent display area 2, and thus the absolute value of the power difference between the first anode power signal and the cathode power signal can be set smaller than the absolute value of the power difference between the second anode power signal and the cathode power signal, that is, the power difference between the second anode power signal and the cathode power signal in the bent display area 2 can be increased, so as to compensate the problem that the bent display area 2 is darker than the flat display area 1, improve the color brightness uniformity of the display panel 200, and improve the display effect of the panel.
Fig. 2 only illustrates a case where the display panel 200 includes one bending display area 2, and may also include a case where two, three, or four bending display areas 2, where the bending display areas 2 may be disposed on two sides of the planar display area 1, or may be disposed around the planar display area 1, and details are not described below. Fig. 4 is a schematic plane development structure of another display panel provided by the present invention, and as shown in fig. 4, optionally, the bending display area 2 in the display panel 200 includes a plurality of sub-bending display areas 21, and in a direction pointing to the non-display area BB along the display area AA, a bending angle of the sub-bending display area 21 gradually increases, and a power supply difference between the second anode power supply signal and the cathode power supply signal of the sub-bending display area 21 also gradually increases.
The bending angles of the bending display area 2 and the flat display area 1 in the display panel 200 are different, so that the brightness of the bending display area 2 is lower than that of the flat display area 1 under the condition of the same visual angle; and the bending display area 2 comprises a plurality of sub-bending display areas 21 with different bending angles, the bending angle is an included angle between a tangent line of the sub-bending display area 21 and a plane of the plane display area 1, however, when the sub-bending display areas 21 in the bending display area 2 gradually increase along with the bending angle, the attenuation degree of the brightness is also seriously increased or decreased, the brightness of the sub-bending display areas 21 gradually decreases along with the gradual increase of the bending angle, that is, the brightness between the sub-bending display areas 21 with different bending angles is also different, and the problems can be solved by the following three methods:
the first method comprises the following steps: as shown in fig. 2, the second anode power signal and the first anode power signal in the bent display region 2 and the flat display region 1 having different angles are different, and the second anode power signal in the sub-bent display region 21 having different angles is different, so as to compensate for the problem that the brightness of each region in the display panel 200 is darker as the bending angle is larger. And then can set up the power difference of the second positive pole power signal and negative pole power signal of sub-bending display area 21 and also increase gradually, and then can compensate sub-bending display area 21 in bending display area 2 along with the problem that the bigger luminance is darker of bending angle, further improve the color brightness uniformity of display panel 200, promote display panel 200's display effect.
And the second method comprises the following steps: as shown in fig. 10, only by arranging the cathode layer 4 in the display panel 200 to include a plurality of cathode blocks 41, i.e., a first cathode block corresponding to the flat display region 1 and a second sub-cathode block 41 corresponding to the second sub-bent display region 21 with different bending angles, different cathode blocks are arranged to receive different cathode power signals, so as to compensate for the problem that the brightness of each region in the display panel 200 is darker as the bending angle is larger.
And the third is that: as shown in fig. 4, the two methods may be combined, that is, the second anode power signals and the first anode power signals in the bent display area 2 and the flat display area 1 with different angles are different, the second anode power signals in the sub-bent display areas 21 with different angles are different, and different cathode blocks are simultaneously arranged to receive different cathode power signals, so as to compensate the problem that the brightness of each area in the display panel 200 is darker as the bending angle is larger.
Fig. 4 only illustrates that the bending display area 2 includes sub-bending display areas 21 with different angles, including a first sub-bending display area 22 and a second sub-bending display area 23, where the first sub-bending display area 22 is located between the second sub-bending display area 23 and the planar display area 1, and the bending angle of the first bending display area 22 is smaller than that of the second sub-bending display area 23, so that the absolute value of the power difference between the second anode power signal and the cathode power signal of the first sub-bending display area 22 can be controlled to be smaller than that of the second anode power signal and the cathode power signal of the second sub-bending display area 23; fig. 4 only illustrates that the bending display area 2 includes two sub-bending display areas 21, of course, the bending display area 2 may also include three or five sub-bending display areas 21, and the bending display area 2 includes a plurality of sub-bending display areas 21 that may be set according to actual conditions, and the number of the sub-bending display areas 21 is not specifically required in the present invention, and is not described in detail below; when the bending display area 2 includes a plurality of sub-bending display areas 21, the absolute value of the power difference between the second anode power signal and the cathode power signal gradually changes along with the bending angle of the sub-bending display areas 21, and the brightness of the display panel 200 is gradually supplemented, so that the uniformity of the display panel can be improved. With continued reference to fig. 2, in the display panel 200, optionally, the first anode power signal line 51 is located in the flat display region 1, the second anode power signal line 52 is located in the bend display region 2, and the potential of the first anode power signal is smaller than that of the second anode power signal.
It can be understood that, under the condition that the absolute value of the power supply difference value between the first anode power supply signal and the cathode power supply signal is smaller than the absolute value of the power supply difference value between the second anode power supply signal and the cathode power supply signal, the structure and the signal size of the cathode layer may not be changed, and only the size of the first anode power supply signal and the size of the second anode power supply signal need to be limited, that is, the electric potential of the first anode power supply signal may be smaller than the electric potential of the second anode power supply signal, so that the problem that the bending display area 2 is darker than the flat display area 1 may be compensated, the color brightness uniformity of the display panel 200 is further improved, and the display effect of the display panel 200 is improved.
With reference to fig. 4, alternatively, along the direction from the display area AA to the non-display area BB, the bending angle of the sub-bending display area 21 gradually increases, and the potential of the second anode power signal of the bending display area 2 gradually increases. Wherein the second anode power signal lines 52 in different sub-bending display areas 21 send different second anode power signals to corresponding different sub-bending display areas 21.
Under the condition that the brightness of the sub-bending display area 21 is gradually reduced along with the gradual increase of the bending angle, and the power difference value between the second anode power signal of the sub-bending display area 21 and the cathode power signal is also gradually increased, the structure and the signal size of the cathode layer can be unchanged, and only the size of the second anode power signal in the sub-bending display area with different bending angles of the sub-bending display area needs to be limited, namely, the bending angle of the sub-bending display area is gradually increased, the potential of the second anode power signal of the bending display area is gradually increased, so that the problem that the brightness of the sub-bending display area 21 in the bending display area 2 is darker along with the larger bending angle can be compensated, the color brightness uniformity of the display panel 200 is further improved, and the display effect of the display panel 200 is improved.
It can be understood that, under the condition of ensuring the above conditions, the structure and the signal size of the cathode layer are not changed, for example, only the size of the second anode power signal in the first sub-bending display area 22 and the second sub-bending display area 23 needs to be limited, that is, the potential of the second anode power signal in the first sub-bending display area 22 is set to be smaller than the second anode power signal in the second sub-bending display area 23, so that the problem that the second bending display area 23 is darker than the first bending display area 22 can be compensated, the color brightness uniformity of the display panel 200 can be further improved, and the display effect of the display panel 200 can be improved. Fig. 5 is a schematic diagram of a planar expanded structure of another display panel provided by the present invention, fig. 6 is a schematic diagram of a planar expanded structure of another display panel provided by the present invention, and in combination with fig. 5 and fig. 6, optionally, the second pixel unit 32 in the display panel 200 includes a plurality of pixels 33, and the second anode power signal line 52 includes a main second anode power signal line 53 and an auxiliary second anode power signal line 54; in the pixel row X direction, the main second anode power supply signal line 53 extends in the pixel column direction Y and is electrically connected to the auxiliary second anode power supply signal line 54 extending in the pixel row X direction; and/or, the main second anode power supply signal line 53 extends in the pixel row direction X along the pixel column Y direction and is electrically connected to the auxiliary second anode power supply signal line 54 extending in the pixel column direction Y.
The display panel 200 may include a plurality of bending regions 2, and when only one bending region is included, or two bending regions 2 oppositely disposed in the pixel row direction X or in the pixel column direction Y, the main second anode power supply signal line 53 and the auxiliary second anode power supply signal line 54 are positioned such that, in the pixel row X direction, the main second anode power supply signal line 53 extends in the pixel column direction Y and is electrically connected to the auxiliary second anode power supply signal line 54 extending in the pixel row X direction, or in the pixel column Y direction, the main second anode power supply signal line 53 extends in the pixel row direction X and is electrically connected to the auxiliary second anode power supply signal line 54 extending in the pixel column direction Y. When the bending display region 2 is disposed along the pixel column direction Y, as shown in fig. 5, fig. 5 only illustrates that along the pixel row direction X, the main second anode power supply signal line 53 extends along the pixel column direction Y and is electrically connected to the auxiliary second anode power supply signal line 54 extending along the pixel row direction X; it is a matter of course that when the bending display area 2 is disposed in the pixel row direction X, the main second anode power supply signal line 53 extends in the pixel row direction X and is electrically connected to the auxiliary second anode power supply signal line 54 extending in the pixel column direction Y.
When the display panel 200 includes the bend display region 2 along the pixel row direction X and the bend display region 2 along the pixel column direction Y, as shown in fig. 6, fig. 6 illustrates that along the pixel row direction X, the main second anode power signal line 53 extends along the pixel column direction Y and is electrically connected to the auxiliary second anode power signal line 54 extending along the pixel row direction X, and along the pixel column direction Y, the main second anode power signal line 53 extends along the pixel row direction X and is electrically connected to the auxiliary second anode power signal line 54 extending along the pixel column direction Y. It can be understood that the main second anode power signal line 53 is disposed along the extending direction of the side edge of the display panel 200 that is bent to be closest to the bending display area 2 where the main second anode power signal line 53 is located, and the main second anode power signal line 53 is disposed along the extending direction of the corresponding side edge of the display panel 200, which can be beneficial to simplify the design of the circuit traces in the display panel 20; the auxiliary second anode power signal line 54 intersects and is electrically connected to the corresponding main second anode power signal line 53, and the auxiliary second anode power signal line 54 can transmit the same second anode power signal to the main second anode power signal line 53, so as to ensure uniform brightness in the bending display region and improve uniformity of the display panel 200. Fig. 7 is a schematic diagram of a planar development structure of a display panel according to still another embodiment of the present invention, and fig. 8 is a schematic diagram of a planar development structure of a display panel according to still another embodiment of the present invention, and in conjunction with fig. 7 and fig. 8, the display panel 200 further includes an edge anode power signal line 55, where the edge anode power signal line 55 is located in the non-display area BB and electrically connected to the auxiliary second anode power signal line 54.
The display panel 200 may include a plurality of bending display regions 2, the bending display region 2 may include a plurality of sub-bending display regions 21, with reference to fig. 7, fig. 7 only illustrates that the display panel 200 includes one bending display region 2, and the second pixel unit 32 in the bending display region 2 includes two columns of pixels 33, in order to ensure that the brightness of the bending display region 2 is consistent, that is, it is required to ensure that the second anode power signals received by the two columns of pixels 33 are the same, since the auxiliary second anode power signal line 54 is electrically connected to the main second anode power signal line 53, it is only required to set the edge anode power signal line 55 and the auxiliary second anode power signal line 54 to be electrically connected to ensure that the second anode power signals received by the two columns of pixels 33 are the same, and exhibit the same brightness; and the edge anode power signal line 55 is disposed in the non-display area BB, which can also reduce the area occupied by the display area AA and improve the light extraction efficiency of the display panel.
With reference to fig. 8, fig. 8 only illustrates that the display panel 200 includes four bending display regions 2, the four bending display regions 2 are disposed around the flat display region 1, and the bending display region 2 includes only two sub-bending display regions 21, that is, includes a first sub-bending display region 22 and a second sub-bending display region 23, and since the bending angles of the first sub-bending display regions 22 in the respective bending display regions are the same and the bending angles of the second sub-bending display regions 23 in the respective bending display regions are the same; that is, an edge anode power signal line 55 and the first sub-bending display region 22 in each bending display region 2 may be provided to transmit the same second anode power signal to the first sub-bending display region 22 in each bending display region 2, and an edge anode power signal line 55 and the second sub-bending display region 23 in each bending display region 2 may be provided to transmit the same second anode power signal to the second sub-bending display region 23 in each bending display region 2; since the bending angles of the corresponding sub-bending display regions 21 in each bending display region 2 are the same, that is, the brightness loss degrees are also the same, the same second anode power supply signal can be used for compensation, so as to ensure the uniformity of the display panel 200; meanwhile, the voltage of the second anode power signal in the second sub-bending display area 23 is set to be greater than the voltage of the anode power signal in the first sub-bending display area 22, so that the uniformity of the display panel 200 is further ensured.
Alternatively, the auxiliary first anode power signal line 511 may be disposed in the flat display area 1, the auxiliary first anode power signal line 511 is electrically connected to the first anode power signal line 51 in a crossing manner, and since the first anode power signal line 51 transmits the first anode power signal to the first pixel unit 31 and the first anode power signal line 51 is connected in series with an entire column of the pixels 33 and the first anode power signal line 51 itself has a resistance to lose a part of the first anode power signal, which may cause a difference in luminance of an entire column of the pixels 33, a circuit network may be formed by the auxiliary first anode power signal line 511 and the first anode power signal line 51, so that the difference in luminance of the pixels 33 is reduced, which is beneficial for improving the uniformity of luminance of the display panel 200 and improving the display efficiency. It is to be understood that since the edge anode power signal line 55 is located in the non-display area BB and is disposed around the flat display area 1, and the edge anode power signal line 55 itself has a resistance, which causes an electrical loss, it is preferable that the cross-sectional area of the edge anode power signal line 55 may be larger than that of the second anode power signal line 52, which may reduce the resistance of the edge anode power signal line 55, and may further reduce the electrical loss of the edge anode power signal line 55 due to its resistance; of course, the edge anode power signal line 55 may also be made of a material with a lower resistivity, and the material with the lower resistivity of the edge anode power signal line 55 is not described in detail below as long as it can meet the protection requirement of the present invention.
With continued reference to fig. 8, the display panel 200 further includes four corner regions C, and since the display panel 200 is a curved display panel, it needs to be cut at the positions of the corner regions C, the curved display panel can be made flat, furthermore, since the cutting is required at the corner region C, the edge anode power signal line 55 is disposed at the corner region C for connecting the bent display regions 21, when a cut is required at the corner region C, the edge anode power signal line 55 is also cut, further, the second anode power signals of the bent display regions cannot be the same, or even the second anode power signals cannot be transmitted, so that the edge anode power signal line 55 is located in the non-display region and bypasses the corner region C, which not only reduces the position of the edge anode power signal line 55 occupying the display region, improves the light-emitting rate of the display panel 200, but also simplifies the process. Fig. 9 is a cross-sectional view taken along direction M-M' in fig. 8, and in conjunction with fig. 8 and 9, the first anode power supply signal line 51 and the plurality of second anode power supply signal lines 52 in the display panel 200 are alternatively arranged in a manner of being insulated from each other.
It is to be understood that the first anode power supply signal line 51 and the second anode power supply signal line 52 are located at any one of the layers in the pixel circuit layer 6, and the first anode power supply signal line 51 and the second anode power supply signal line 52 are further provided in a different-layer insulating arrangement, the circuit wiring arrangement of the display panel 200 can be simplified, and the short circuit between the first anode power supply signal line 51 and the second anode power supply signal line 52 can be further prevented from affecting the display. Fig. 8 only shows that the first anode power supply signal line 51 is located on the side of the second anode power supply line 52 close to the pixel defining layer 7, but the positions of the first anode power supply signal line 51 and the second anode power supply line 52 may be interchanged, and it is only necessary to ensure that the first anode power supply signal line 51 is located between the second anode power supply line 52 and is arranged in a different layer, so that the first anode power supply signal line 51 and the second anode power supply line are insulated from each other. Meanwhile, the second anode power signal lines 52 providing the second anode power signals for the different bending display areas 2 are also arranged in different layers, and the different edge anode power signal lines 55 providing the second anode power signals for the second anode power signal lines 52 are also arranged in different layers, that is, the different wires corresponding to one bending display area 2 can be arranged in the same layer, and the different wires corresponding to different bending display areas 2 are arranged in different layers, so that the circuit wire arrangement can be simplified, and the display effect of the display panel 200 can be further prevented from being influenced by short circuit between the wires. Fig. 8 only illustrates that the display panel 200 includes six first anode power signal lines 51 and two second anode power signal lines 52, however, the number of the second anode power signal lines 52 is not specifically required in the present invention, and may be set according to an actual situation, and is not described in detail below; no matter how many second anode power supply signal lines 52 are provided in a different layer from the first anode power supply signal line 51, the first anode power supply signal line 51 and the second anode power supply signal line 52 are located in any one of the pixel circuit layers 6, and providing the first anode power supply signal line 51 and the second anode power supply signal line 52 in a different layer insulating arrangement can simplify the circuit wiring arrangement of the display panel 200 and can further prevent a short circuit between the first anode power supply signal line 51 and the second anode power supply signal line 52 from affecting the display.
Alternatively, the edge anode power supply signal line 55 and the second anode power supply signal line 52 in the display panel 200 are disposed in the same layer.
It is understood that, since the edge anode power signal line 55 and the second anode power signal line 52 need to be electrically connected, the edge anode power signal line 55 and the second anode power signal line 52 are disposed in the same layer, and the edge anode power signal line 55 and the second anode power signal line 52 in different layers do not need to be electrically connected by a via or the like, the process can be simplified, and the process error can be reduced; meanwhile, since the first anode power signal line 51 and the second anode power signal line 2 are disposed in different layers, it can be known that the edge anode power signal line 55 and the first anode power signal line 51 are disposed in different layers, and as can be seen from fig. 9, when the bending display area 2 is located in the direction of the extension line of the first anode signal line 51 in the flat display area 1, the first anode power signal line 51 passes through the bending display area 2, and the edge anode power signal line 55 and the first anode power signal line 51 are disposed in different layers, so as to prevent the display effect of the display panel 200 from being affected by the short circuit between the edge anode power signal line 55 and the first anode power signal line 5.
Fig. 10 is a schematic structural diagram of another display panel provided by the present invention, and referring to fig. 10, a cathode block 41 in a display panel 200 includes a first cathode block 42 in a flat display region 1 and a second cathode block 43 in a bent display region 2; the cathode power supply signal line 44 is located in the non-display area BB and includes a first cathode power supply signal line 441 supplying a first cathode power supply signal to the first cathode block 42 and a second cathode power supply signal line 442 supplying a second cathode power supply signal to the second cathode block 43; the potential of the first cathode power supply signal is greater than the potential of the second cathode power supply signal.
It can be understood that, under the condition that the absolute value of the power supply difference value between the first anode power supply signal and the cathode power supply signal is set to be smaller than the absolute value of the power supply difference value between the second anode power supply signal and the cathode power supply signal, the magnitude of the first anode power supply signal and the magnitude of the second anode power supply signal may not be changed, and only the potential of the first cathode power supply signal of the flat display area 1 needs to be limited to be larger than the potential of the second cathode power supply signal of the bent display area 2, so that the problem that the bent display area 2 is darker than the flat display area 1 can be compensated, the color brightness uniformity of the display panel 200 is further improved, and the display effect of the display panel 200 is improved; of course, both the anode power signal and the cathode power signal may be changed, that is, the potential of the first cathode power signal of the flat display area 1 is set to be greater than the potential of the second cathode power signal of the bending display area 2, and the potential of the first anode power signal of the flat display area 1 is set to be less than the potential of the second anode power signal of the bending display area 2, which is further beneficial to improving the display effect of the display panel 200.
Fig. 11 is a schematic structural diagram of another display panel provided by the present invention, and referring to fig. 11, the second cathode block 43 in the display panel 200 includes a plurality of second sub-cathode blocks 431, the bent display region 2 includes at least one sub-bent display region 21, and the second sub-cathode blocks 431 are in one-to-one correspondence with the sub-bent display regions 21; in the direction from the display area AA to the non-display area BB, the bending angle of the sub-bent display area 21 gradually increases, and the potential of the second cathode power signal provided by the sub-bent display area 21 to the second sub-cathode 431 gradually decreases.
It can be understood that the bending display area 2 may include a plurality of sub-bending display areas 21 with different bending angles, the bending angle is an included angle between the sub-bending display area 21 and the flat display area, however, when the sub-bending display areas 21 in the bending display area 2 gradually increase with the bending angle, the attenuation degree of the brightness thereof also increases and decreases severely, the brightness of the sub-bending display areas 21 gradually decreases with the gradual increase of the bending angle, and under the condition that the power difference between the second anode power signal and the cathode power signal of the sub-bending display areas 21 also gradually increases, the magnitude of the first anode power signal and the second anode power signal may not be changed, and only the bending angle of the sub-bending display areas 21 needs to be limited to be gradually increased, and the potential of the second cathode power signal provided by the sub-bending display areas 21 for the second sub-cathodes 431 is gradually decreased, that is, the bending angle of the sub-bending display areas is gradually increased, the potential of the second cathode power signal of the bent display area is gradually reduced, so that the problem that the brightness of the sub-bent display area 21 in the bent display area 2 is darker as the bending angle is larger can be compensated, the color brightness uniformity of the display panel 200 is further improved, and the display effect of the display panel 200 is improved; of course, the anode power signal and the cathode power signal may be changed, that is, the bending angle of the bending display area is gradually increased, the potential of the second cathode power signal of the bending display area is gradually decreased, and the second anode power signal is gradually increased, which is further beneficial to improving the display effect of the display panel 200.
Fig. 12 is a schematic view of a planar development structure of another display panel provided by the present invention, fig. 13 is a schematic view of a planar development structure of another display panel provided by the present invention, and referring to fig. 12 and fig. 13, the display panel 200 further includes a substrate 11, and in a direction along which the display area AA points to the non-display area BB, the areas of orthogonal projections of the second sub-cathode blocks 431, which are correspondingly disposed in the plurality of bent display areas 2, on the substrate 11 are different.
As shown in fig. 12, in the display panel 200, in the direction from the display area AA to the non-display area BB, the area of the orthogonal projection of the second sub-cathode blocks 431 corresponding to the plurality of bent display areas 2 on the plane of the substrate 11 gradually increases. It can be understood that, when the human eye observes the flat display area 1 and the bending display area 2, the area observed by one side of the bending display area 2 far away from the flat display area 1 is gradually reduced, and then the brightness change degree of the sub-bending display area 21 far away from one side of the flat display area 1 is gradually reduced, so that the human eye can observe the sub-bending display area with a smaller area, and the area of the actual bending display area is at a position with a larger area, that is, in the direction in which the display area AA points to the non-display area BB, the area of the sub-bending display area 21 can be gradually increased, which can improve the display effect of the display device and simplify the process. Fig. 12 only shows that the second cathode block 43 includes two sub-second cathode blocks 431, where the sub-second cathode block near the flat display area 1 is 431 first sub-cathode block 432, the sub-second cathode block far from the flat display area 1 is 431 second sub-cathode block 433, an area of an orthogonal projection of the first sub-cathode block 432 on a plane where the substrate base plate 11 is located is smaller than an area of an orthogonal projection of the second sub-cathode block 433 on a plane where the substrate base plate 11 is located, and an area of an area where the second sub-cathode block 433 is located intersected with the area of the first sub-cathode block 432 is observed by human eyes, so that the luminance of the second sub-bent display area 23 can be controlled by using the same second cathode power signal, a problem that the luminance of the second sub-bent display area 23 is smaller than the luminance of the first sub-bent display area 22 can be compensated, and a display effect of the display panel 200 can be improved.
As shown in fig. 13, in the display panel 200, in the direction from the display area AA to the non-display area BB, the area of the orthogonal projection of the second sub-cathode blocks 431 corresponding to the plurality of bent display areas 2 on the plane of the substrate 11 gradually decreases. It can be understood that, because the bending angle difference between the bending display areas 1 at the corresponding positions of the adjacent pixel units 3 in the bending display area 1 close to one side of the flat display area 1 is small, the brightness attenuation degree is relatively smooth, and further, a cathode block with a large area can be used for covering all the pixel units with the relatively smooth attenuation degree, the brightness of the pixel units can be controlled by using the same second anode power supply signal, so that the display effect of the display device can be improved, and the process can be simplified; the bending angle difference between the bending display areas 1 at the corresponding positions of the adjacent pixel units 3 is large, one pixel unit can be covered by one cathode block with a small area, the brightness of the pixel unit can be controlled by the aid of the independent second anode power signal, the brightness of the pixel unit can be controlled more accurately, and the brightness uniformity of the display panel 200 is guaranteed. Fig. 13 only shows that the second cathode block 43 includes two sub-second cathode blocks 431, wherein the sub-second cathode block closer to the flat display region 1 is 431 and the third sub-cathode block 434, the sub-second cathode block farther from the flat display region 1 is 431 and the fourth sub-cathode block 435, the area of the orthographic projection of the third sub-cathode block 434 on the plane of the substrate 11 is larger than the area of the orthographic projection of the fourth sub-cathode block 435 on the plane of the substrate 11, and the brightness attenuation degree of the third sub-cathode block 434 closer to the flat display region 1 is relatively flat, so that the same second cathode power signal can be used to control the brightness of the second sub-bent display region 23, the problem that the brightness of the second sub-bent display region 23 is smaller than the brightness of the first sub-bent display region 22 can be compensated, and the display effect of the display panel 200 can be improved.
Fig. 14 is a cross-sectional view taken along direction K-K' in fig. 11, and in conjunction with fig. 14, the first cathode power signal line 441 and the plurality of second cathode power signal lines 442 in the display panel 200 are arranged in a different layer, that is, the first cathode power signal line 441 and the second cathode power signal line 442 are arranged in a different layer, and the second cathode power signal lines 442 providing different cathode power signals for different bent display regions 2 are arranged in a different layer, so that short circuit between the first cathode power signal line 441 and the plurality of second cathode power signal lines 442 can be prevented from affecting the display effect of the display panel 200, and the circuit can be simplified.
The present invention further provides a display device 300 including the display panel 200 according to any of the above embodiments of the present invention. Fig. 15 is a schematic view of a display device provided in the present invention, and in combination with fig. 15, a display device 300 includes the display panel 200 according to any of the embodiments of the present invention. The embodiment of fig. 15 only takes a mobile phone as an example to describe the display device 200, and it should be understood that the display device 200 provided in the embodiment of the present invention may be other display devices with a display function, such as a computer, a television, a vehicle-mounted display device, and the present invention is not limited thereto. The display device provided in the embodiment of the present invention has the beneficial effects of the display panel provided in the embodiment of the present invention, and specific reference is specifically made to the specific description of the display device in each of the above embodiments, which is not repeated herein.
As can be seen from the above embodiments, the display panel and the display device provided by the present invention at least achieve the following advantages:
the absolute value of the power supply difference value of the first anode power supply signal and the cathode power supply signal in the plane display area of the display panel and the display device is smaller than the absolute value of the power supply difference value of the second anode power supply signal and the cathode power supply signal in the bending display area, and the brightness attenuation degree in the bending display area is larger than that of the plane display area, so that the color brightness uniformity of the plane display area and the bending display area of the display panel can be improved after the absolute value of the power supply difference value of the first anode power supply signal and the cathode power supply signal in the plane display area is smaller than that of the second anode power supply signal and the cathode power supply signal in the bending display area, and the display effect is improved.
Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustrative purposes only and are not intended to limit the scope of the present invention. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.
Claims (12)
1. A display panel is characterized by comprising a display area and a non-display area surrounding the display area, wherein the display area comprises a plane display area and at least one bent display area, the bent display area is positioned between the plane display area and the non-display area, and the bent display area is bent towards the direction away from a light-emitting surface of the plane display area;
the display area further comprises a plurality of pixel units, each pixel unit comprises a first pixel unit and a second pixel unit, the first pixel unit is located in the plane display area, and the second pixel unit is located in the bent display area;
further comprising a cathode layer and a power signal line;
the cathode layer comprises at least one cathode block;
the power supply signal lines include a cathode power supply signal line providing a cathode power supply signal to the cathode layer, a first anode power supply signal line providing a first anode power supply signal to the first pixel cell, and a second anode power supply signal line providing a second anode power supply signal to the second pixel cell;
the absolute value of the power supply difference between the first anode power supply signal and the cathode power supply signal is smaller than the absolute value of the power supply difference between the second anode power supply signal and the cathode power supply signal;
the second pixel unit includes a plurality of pixels, the second anode power supply signal line includes a main second anode power supply signal line and an auxiliary second anode power supply signal line;
in the pixel row direction, the main second anode power supply signal line extends in the pixel column direction and is electrically connected to an auxiliary second anode power supply signal line extending in the pixel row direction;
and/or, the main second anode power supply signal line extends in the pixel row direction and is electrically connected to an auxiliary second anode power supply signal line extending in the pixel column direction, along the pixel column direction.
2. The display panel of claim 1, wherein the bending display region comprises at least one sub-bending display region along a direction of the display region pointing to the non-display region, a bending angle of the sub-bending display region gradually increases, and a power difference between the second anode power signal and the cathode power signal of the sub-bending display region also gradually increases.
3. The display panel according to claim 1, wherein the first anode power supply signal line is located in the flat display region, wherein the second anode power supply signal line is located in the bend display region, and wherein a potential of the first anode power supply signal is lower than a potential of the second anode power supply signal.
4. The display panel according to claim 2, wherein the bending angle of the sub-bending display region gradually increases and the potential of the second anode power signal of the bending display region gradually increases along a direction in which the display region points to the non-display region.
5. The display panel according to claim 4, wherein the first anode power supply signal line and the plurality of second anode power supply signal lines are provided to be different layers in an insulating manner.
6. The display panel according to claim 1, further comprising an edge anode power supply signal line which is located in the non-display region and electrically connected to the auxiliary second anode power supply signal line.
7. The display panel according to claim 6, wherein the edge anode power supply signal line is provided in the same layer as the second anode power supply signal line.
8. The display panel according to claim 1, wherein the cathode blocks include a first cathode block located in the flat display region and a second cathode block located in the bent display region;
the cathode power supply signal line is located in the non-display region and includes a first cathode power supply signal line for supplying a first cathode power supply signal to the first cathode block and a second cathode power supply signal line for supplying a second cathode power supply signal to the second cathode block;
the potential of the first cathode power supply signal is greater than the potential of the second cathode power supply signal.
9. The display panel according to claim 8, wherein the second cathode block comprises a plurality of second sub-cathode blocks, the bent display region comprises at least one sub-bent display region, and the second sub-cathode blocks correspond to the sub-bent display regions one to one;
and in the direction pointing to the non-display area along the display area, the bending angle of the sub-bending display area is gradually increased, and the potential of the second cathode power supply signal provided by the sub-bending display area for the second sub-cathode is gradually reduced.
10. The display panel according to claim 9, further comprising a substrate base plate, wherein in a direction from the display region to the non-display region, orthogonal projections of the second sub-cathode blocks on a plane of the substrate base plate, where the second sub-cathode blocks are correspondingly disposed in the plurality of bent display regions, have different areas.
11. The display panel according to claim 9, wherein the first cathode power supply signal line and the plurality of second cathode power supply signal lines are arranged to be different in layer insulation.
12. A display device comprising the display panel according to any one of claims 1 to 11.
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| CN114503273A (en) | 2020-06-18 | 2022-05-13 | 京东方科技集团股份有限公司 | Display panel, manufacturing method thereof and display device |
| CN111696461B (en) * | 2020-06-30 | 2022-05-27 | 武汉天马微电子有限公司 | Display panel and display device |
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| CN107863359A (en) * | 2017-11-30 | 2018-03-30 | 武汉天马微电子有限公司 | A kind of display panel and display device |
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| CN109244269B (en) * | 2018-09-19 | 2021-01-26 | 京东方科技集团股份有限公司 | Display panel, manufacturing method thereof and display device |
| CN109904204B (en) * | 2019-03-15 | 2021-07-23 | 武汉天马微电子有限公司 | Flexible display panel and display device |
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| CN107863359A (en) * | 2017-11-30 | 2018-03-30 | 武汉天马微电子有限公司 | A kind of display panel and display device |
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