CN113299232A - Display panel, driving method thereof and display device - Google Patents
Display panel, driving method thereof and display device Download PDFInfo
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- CN113299232A CN113299232A CN202110605800.6A CN202110605800A CN113299232A CN 113299232 A CN113299232 A CN 113299232A CN 202110605800 A CN202110605800 A CN 202110605800A CN 113299232 A CN113299232 A CN 113299232A
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
- G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
- G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
- G09G3/3225—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix
- G09G3/3233—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix with pixel circuitry controlling the current through the light-emitting element
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
- G09G2320/0233—Improving the luminance or brightness uniformity across the screen
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
- G09G2330/02—Details of power systems and of start or stop of display operation
- G09G2330/021—Power management, e.g. power saving
Abstract
The embodiment of the invention discloses a display panel, a driving method thereof and a display device. The display panel includes: at least two display areas; and the power supply signal lines are used for providing power supply signals to the corresponding display areas, and the voltage values of the power supply signal lines are matched with the brightness of the corresponding display areas. Compared with the prior art, the embodiment of the invention reduces the power consumption, increases the brightness uniformity and improves the display effect of the display panel.
Description
Technical Field
The present invention relates to display technologies, and in particular, to a display panel, a driving method thereof, and a display device.
Background
With the development of display technology, people have higher and higher requirements for the performance of display panels, and especially the display performance of display panels is always one of the targets that consumers and panel manufacturers continuously pursue. However, the conventional display panel has problems that power consumption increases and luminance uniformity deteriorates as the size of the display panel increases, which affects the display effect of the display panel.
Disclosure of Invention
The embodiment of the invention provides a display panel, a driving method thereof and a display device, which are used for reducing power consumption, increasing brightness uniformity and improving the display effect of the display panel.
In order to achieve the technical purpose, the embodiment of the invention provides the following technical scheme:
a display panel, comprising:
at least two display areas;
and the power signal lines are used for providing power signals to the corresponding display areas, and the voltage values of the power signal lines are matched with the brightness of the corresponding display areas.
According to the technical scheme, the embodiment of the invention realizes the partition control of the power supply signal of the display panel. Compared with the existing display panel, on one hand, the display area corresponding to one power supply signal line is reduced, the number of pixels is reduced, the driving current on the power supply signal line is reduced, and the IR-Drop is reduced, so that the brightness uniformity of the display panel is improved on the basis of reducing the power consumption; on the other hand, according to the brightness requirements of at least two display areas, the voltage values of the corresponding power signal lines can be set, so that the power consumption of the display panel is further reduced, and the brightness uniformity of the display panel is also improved.
Optionally, the average preset brightness of the at least two display regions is different, and the brightness of the display regions is associated with the average preset brightness, so as to set the voltage value of the power signal line according to the average preset brightness of the display regions, so as to ensure that the set voltage value is matched with the brightness of the display regions.
And/or the loss of the power supply signal lines corresponding to at least two display areas is different, the brightness of the display areas is related to the loss of the power supply signal lines, and the voltage value of the power supply signal lines is set according to the loss of the power supply signal lines corresponding to the display areas so as to ensure that the set voltage value is matched with the brightness of the display areas.
Optionally, the display region includes pixel units arranged in an array, each pixel unit includes a pixel circuit and a light emitting device, and the pixel circuit provides a driving current to the light emitting device to drive the light emitting device to emit light; wherein the power supply signal line is connected to the pixel circuit, or the power supply signal line is connected to the light emitting device. The embodiment of the invention does not limit the specific type of the power signal line, and the signal line which provides the power signal in the display panel can be controlled in a partition mode, so that the voltage value of each power signal line is matched with the brightness of the corresponding display area.
Alternatively, the light emitting device includes a first pole and a second pole, the first pole of the light emitting device is connected to the pixel circuit, and the second pole of the light emitting device is connected to the corresponding power signal line, that is, the embodiment of the present invention can perform the partition control of the power signal line connected to the light emitting device.
Preferably, the second electrodes of the light emitting devices located in the same display region share one electrode block, and the electrode block is connected to the corresponding power signal line, which is advantageous to simplify the manufacturing process and reduce the resistance of the electrode block shared by the light emitting devices.
Preferably, the power signal wire is lapped with the edge of the corresponding electrode block, other complicated lapping designs are not needed, the lapping mode is simple, the realization is easy, and the transmission of the power signal is convenient.
Preferably, the first pole is an anode, the second pole is a cathode, the power signal line provides negative voltage, namely, the voltage of the electrode block is negative voltage, and the power signal line providing negative voltage is subjected to zone control.
Or the first pole is a cathode, the second pole is an anode, the power signal line provides positive voltage, namely the voltage of the electrode block is positive voltage, and the power signal line providing the positive voltage is subjected to zone control.
Alternatively, the light emitting device includes a first pole, the first pole of the light emitting device is connected to the pixel circuit, and the power signal line is connected to the pixel circuit, that is, the embodiment of the invention can perform the divisional control of the power signal line connected to the pixel circuit.
Preferably, the power signal lines corresponding to the same display area are connected in a mesh shape, and compared with a single power signal line, the mesh shape of the power signal lines is beneficial to reducing on-line resistance and loss. In addition, compared with the block-shaped electrode, the mesh-shaped power supply signal wire is flexible in arrangement mode and can be arranged in the array film layer.
Preferably, the first electrode is an anode and the power signal line provides a positive voltage, i.e. the power signal line of the mesh connection is a positive voltage.
Alternatively, the first electrode is a cathode and the power signal line provides a negative voltage, i.e. the power signal line connected in a mesh is a negative voltage.
Optionally, at least two display regions are arranged in an array, so that the display area of each display region is smaller, the required driving current is reduced, and the IR-Drop is reduced, thereby further increasing the brightness uniformity of the display panel.
Preferably, the shape of the display area includes at least one of a rectangle, a circle, a diamond, an ellipse, or a triangle, and the shape of the display area may be set as desired.
Optionally, the at least two display regions include at least one first display region and at least one second display region, the at least one first display region is located in the middle of the display panel, and the at least one second display region surrounds the at least one first display region;
optionally, the shape of the second display area and the shape of the first display area each include at least one of a rectangle, a circle, a diamond, an ellipse, or a triangle, and the shapes of the display areas may be set as needed.
Optionally, the bending shaft is used for realizing folding display of the display panel, the at least two display areas are respectively located on two sides of the bending shaft, the display areas located on two sides of the bending shaft can be controlled respectively, and reduction of power consumption of the display panel is facilitated.
Correspondingly, the invention further provides a driving method of the display panel, the driving method is used for driving the display panel according to any embodiment of the invention, and the driving method has corresponding beneficial effects. The driving method comprises the following steps:
determining the voltage value of the corresponding power signal line according to the brightness of at least two display areas;
at least two power signal lines receive voltage values to drive the display area to display pictures.
Correspondingly, the invention further provides a display device which comprises the display panel according to any embodiment of the invention and has corresponding beneficial effects.
The embodiment of the invention realizes the partition control of the power supply signal of the display panel by arranging at least two power supply signal lines which respectively correspond to at least two display areas, wherein the power supply signal lines are used for providing the power supply signal for the corresponding display areas, and the voltage value of the power supply signal lines is matched with the brightness of the corresponding display areas. Compared with the existing display panel, on one hand, the display area corresponding to one power supply signal line is reduced, the number of pixels is reduced, the driving current on the power supply signal line is reduced, and the IR-Drop is reduced, so that the brightness uniformity of the display panel is improved on the basis of reducing the power consumption; on the other hand, according to the brightness requirements of at least two display areas, the voltage values of the corresponding power signal lines can be set, so that the power consumption of the display panel is further reduced, and the brightness uniformity of the display panel is also improved.
Drawings
Fig. 1 is a schematic structural diagram of a display panel according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of another display panel according to an embodiment of the present invention;
fig. 3 is a schematic diagram of a pixel circuit according to an embodiment of the invention;
FIG. 4 is a schematic diagram of another pixel circuit according to an embodiment of the present invention;
fig. 5 is a schematic cross-sectional view illustrating a display panel according to an embodiment of the invention;
fig. 6 is a schematic structural diagram of another display panel according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of another display panel according to an embodiment of the present invention;
fig. 8 is a schematic structural diagram of another display panel according to an embodiment of the present invention;
fig. 9 is a schematic structural diagram of another display panel according to an embodiment of the present invention;
fig. 10 is a schematic structural diagram of another display panel according to an embodiment of the present invention;
fig. 11 is a schematic structural diagram of another display panel according to an embodiment of the present invention;
fig. 12 is a flowchart of a driving method of a display panel according to an embodiment of the invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
As described in the background art, as the size of the display panel increases, the conventional display panel has problems of increased power consumption and poor brightness uniformity, which affect the display effect of the display panel. The inventors have found, through long-term research, that the reasons for the above problems are as follows:
generally, the overall brightness of different display regions in a display panel is different, and the brightness of each pixel is changed in the prior art by supplying different data voltages to different pixel circuits. However, in the process of driving the light emitting device to emit light, the display luminance differs between the display screens due to the difference in the display screens of the different display regions. In addition, since the power supply voltages in different display regions of the display panel are set to be the same at present, the power supply voltage in a region with low luminance is also the same as the voltage in a region with high luminance, and therefore, the power consumption is high. And the display panel is provided with power supply voltage by the same power line, and the current of all pixels on the display panel is provided by the power line, so that the driving current of the display area is larger. And the larger the size of the display panel and the larger the number of pixels, the larger the current on the power line, thereby increasing the voltage Drop (IR-Drop) of the power line. The IR-Drop causes different power voltages to be received by different display regions, so that the brightness uniformity is deteriorated, which affects the display effect of the display panel.
In view of the foregoing problems, embodiments of the present invention provide a display panel. Fig. 1 is a schematic structural diagram of a display panel according to an embodiment of the present invention. Referring to fig. 1, the display panel includes at least two display areas 100 and at least two power supply signal lines 200, and it is exemplarily shown in fig. 1 that the display panel includes four display areas 100 and four power supply signal lines 200. The at least two power signal lines 200 correspond to the at least two display areas 100, respectively, the power signal lines 200 are used for providing power signals to the corresponding display areas 100, and the voltage values of the power signal lines 200 are matched with the brightness of the corresponding display areas 100.
The display panel including at least two display areas 100 is to divide the display areas 100. Specifically, different power signals may be provided to different display areas 100 while keeping the pixel arrangement of the display panel unchanged, that is, different display areas 100 may be divided according to the connected power signal lines 200. The at least two power signal lines 200 respectively correspond to the at least two display areas 100, and the at least two power signal lines 200 respectively correspond to the at least two display areas 100 one to one, that is, one power signal line 200 provides a power signal to one display area 100; alternatively, one power signal line 200 corresponds to at least two display regions 100, i.e., one power signal line 200 supplies a power signal to at least two display regions 100. The matching of the voltage value of the power signal line 200 with the luminance of the corresponding display region 100 means that the voltage value of the power signal line 200 is determined by the luminance of the corresponding display region 100.
Illustratively, the driving method of the display panel is to determine the voltage value of the corresponding power signal line 200 according to the brightness of at least two display areas 100; at least two power signal lines 200 receive voltage values to drive the display area to display images. The brightness of at least two display areas 100 in the display panel is different, and the voltage values received by at least two power signal lines 200 are also different, so that the partition control of the power signals of the display panel is realized. For example, if the average preset luminance of one of the display regions 100 is higher, the voltage value of the corresponding power signal line 200 is larger; if the average preset luminance of the other display regions 100 is lower, the voltage value of the corresponding power signal line 200 is smaller, so that the voltage value can be provided as required, thereby being beneficial to reducing the overall power consumption of the display panel. For another example, if one of the display regions 100 is farther from the driver chip and the IR-Drop on the corresponding power signal line 200 is larger, the voltage value of the power signal line 200 is larger to offset the influence of the IR-Drop, thereby improving the brightness uniformity of the display panel.
In summary, in the embodiments of the present invention, at least two power signal lines 200 are respectively corresponding to at least two display areas 100, the power signal lines 200 are used for providing power signals to the corresponding display areas 100, and the voltage values of the power signal lines 200 are matched with the brightness of the corresponding display areas 100, so that the partition control of the power signals of the display panel is realized. Compared with the existing display panel, on one hand, the display area corresponding to one power supply signal line 200 is reduced, the number of pixels is reduced, the driving current on the power supply signal line 200 is reduced, and the IR-Drop is reduced, so that the brightness uniformity of the display panel is improved on the basis of reducing power consumption. On the other hand, according to the luminance requirements of at least two display regions 100, the voltage values of the corresponding power signal lines 200 can be set, which is not only beneficial to further reducing the power consumption of the display panel, but also beneficial to improving the luminance uniformity of the display panel.
In the above embodiments, there are various types of power supply signal lines that affect the display luminance of the display area, and some of them will be described below, but the present invention is not limited thereto.
Fig. 2 is a schematic structural diagram of another display panel according to an embodiment of the present invention, and fig. 3 is a schematic diagram of a pixel circuit according to an embodiment of the present invention. Referring to fig. 2 and 3, in an embodiment of the present invention, optionally, the display area 100 includes pixel units 110 arranged in an array, the pixel units 110 include pixel circuits 111 and light emitting devices D, and the pixel circuits 111 provide driving currents to the light emitting devices D to drive the light emitting devices D to emit light. Exemplarily, the Light Emitting device D may be an OLED (Organic Light Emitting Diode), a micro LED (micro Light Emitting Diode), a QLED (Quantum Dot Light Emitting Diode), an LED (Light Emitting Diode), or the like.
There are various ways of arranging the pixel circuits, and fig. 3 illustrates a 2T1C pixel circuit as an example. The pixel circuit 111 includes a switching transistor T1, a driving transistor T2, and a storage capacitor C. A gate of the switching transistor T1 is connected to the SCAN signal SCAN, a first pole of the switching transistor T1 is connected to the data signal Vdata, a second pole of the switching transistor T1 is connected to the gate of the driving transistor T2, one end of the storage capacitor C is connected to the gate of the driving transistor T2, the other end of the storage capacitor C is connected to the first pole of the driving transistor T2, a first pole of the driving transistor T2 is connected to the first power signal line VDD, and a second pole of the driving transistor T2 is connected to the anode of the light emitting device D. The power supply signal line 200 connected to the pixel circuit 111 is a first power supply signal line VDD, and the power supply signal line 200 connected to the light emitting device D is a second power supply signal line VSS. In the embodiment of the present invention, the number of the first power signal lines VDD is set to be at least two, and the first power signal lines VDD respectively provide power signals to the corresponding display areas 100, and then the number of the second power signal lines VSS is set to be one, so that the same power voltage value is provided to all the display areas 100; or at least two second power signal lines VSS are provided to respectively supply power signals to the corresponding display regions 100, and then one second power signal line VSS is provided to supply the same power voltage value to all the display regions 100.
Illustratively, the pixel circuit 111 operates on the principle that when the switching transistor T1 is turned on in response to the SCAN signal SCAN, the data signal Vdata charges the storage capacitor C through the switching transistor T1 and drives the driving transistor T2 to be turned on, the anode of the light emitting device D is connected to the power voltage on the first power signal line VDD, the cathode of the light emitting device D is connected to the power voltage on the second power signal line VSS, and the driving transistor T2 supplies a driving current to the light emitting device D, thereby driving the light emitting device D to emit light.
With continued reference to fig. 2 and 3, in one embodiment of the present invention, optionally, the light emitting device D includes a first pole and a second pole, the first pole of the light emitting device D is connected to the pixel circuit 111, and the second pole of the light emitting device D is connected to the corresponding power signal line 200. Illustratively, the first pole of the light emitting device D shown in fig. 3 is an anode, the anode of the light emitting device D is connected to the pixel circuit 111, and the cathode of the light emitting device D is connected to the corresponding power signal line 200. Then, the voltage on the first power signal line VDD is a positive voltage, and the voltage on the second power signal line VSS is a negative voltage.
Fig. 4 is a circuit diagram of another pixel circuit according to an embodiment of the invention. Referring to fig. 4, unlike fig. 3, a first pole of the driving transistor T2 is connected to the cathode of the light emitting device D, and a second pole of the driving transistor T2 is connected to the second power signal line VSS. Among them, the power supply signal line 200 connected to the anode of the light emitting device D is a first power supply signal line VDD, and the power supply signal line 200 connected to the pixel circuit 111 is a second power supply signal line VSS.
With continued reference to fig. 3 and 4, the gate-source voltage of the driving transistor T2 is not only related to the voltage of the first power signal line VDD, but is actually related to the voltage of the second power signal line VSS, and therefore, the driving current of the driving transistor T2 is also related to the voltage of the second power signal line VSS, so that the luminance of the light emitting device D can be changed by adjusting the voltage of the first power signal line VDD and the voltage of the second power signal line VSS, and further, the voltage value of the power signal line 200 is matched to the luminance of the corresponding display area 100 by setting the voltage of the first power signal line VDD or the voltage of the second power signal line VSS.
In fig. 3 and 4, the first pole of the light emitting device D is an anode, the second pole thereof is a cathode, the first power signal line VDD is supplied with a positive voltage, the second power signal line VSS is supplied with a negative voltage, and the second power signal line VSS is used as the power signal line 200 for zone control. Alternatively, the first power supply signal line VDD is subjected to partition control as the power supply signal line 200. This is not a limitation on the present invention, and in other embodiments, the first power signal line VDD may be configured to provide a negative voltage and the second power signal line VSS may be configured to provide a positive voltage, as needed.
In the above embodiments, the 2T1C pixel circuit is taken as an example for explanation, but the present invention is not limited thereto, and in other embodiments, the pixel circuit may be provided in a 7T1C configuration or other configurations as necessary.
In addition to the above embodiments, the film layers and the wiring patterns of the display panel are different according to the types of the power signal lines, and some of the film layers and the wiring patterns will be described below, but the present invention is not limited thereto.
With continued reference to fig. 1 and 2, in one embodiment of the present invention, the second poles of the light emitting devices D located in the same display area optionally share one electrode block 300, and the electrode blocks 300 are connected to the corresponding power signal lines 200. The embodiment of the invention arranges the same display area 100 to share one electrode block 300, which is beneficial to simplifying the manufacturing process and reducing the resistance of the electrode block 300.
Fig. 5 is a schematic cross-sectional structure diagram of a display panel according to an embodiment of the invention. With reference to fig. 1, 2 and 5, alternatively, the first electrode of the light emitting device D is an anode, the anode of the light emitting device D is connected to the pixel circuit 111, the second electrode of the light emitting device D is a cathode, each light emitting device D is connected to a common cathode, and the electrode block 300 is a cathode block. The power signal line 200 connected to the cathode block is a second power signal line VSS which supplies a negative voltage to the cathode block.
In which, unlike the related art, the embodiment of the invention provides the cathode blocks as at least two cathode blocks corresponding to the display region 100. One display region 100 may correspond to one cathode block, and the size of the cathode block may be equal to that of the corresponding display region 100, or as shown in fig. 1 and 2, the area of the cathode block may be larger than that of the display region 100. For example, the cathode blocks corresponding to different display regions 100 may be divided by a laser etching dividing process.
With continued reference to fig. 1 and 2, in one embodiment of the present invention, optionally, the area of the electrode block 300 farther from the starting end of the power signal line 200 is larger than the area of the electrode block closer to the starting end of the power signal line 200. In this way, the power signal lines 200 do not need to be arranged and the direction of the power signal lines 200 does not need to be changed, and the power signal lines 200 can be directly connected with the corresponding electrode blocks 300 in an overlapping mode, so that the forming process of the power signal lines 200 can be simplified.
Fig. 6 is a schematic structural diagram of another display panel according to an embodiment of the present invention. Referring to fig. 6, in an embodiment of the present invention, the power signal lines 200 corresponding to the same display area 100 are optionally connected in a mesh shape. The power signal line 200 is arranged in a mesh shape, which is advantageous in reducing on-line resistance and loss, compared to a single power signal line 200. In addition, the mesh-shaped power signal lines 200 are more flexible than the block-shaped electrodes and can be disposed in the array film layer. The mesh-shaped power signal line 200 includes a first trace extending along a first direction X and a second trace extending along a second direction Y, and the first trace and the second trace are located on the same film layer or on different film layers.
For example, the voltage on the power signal line 200 may be a positive voltage, the pixel units in the same display area 100 may be connected to the power signal line 200 connected to the mesh, and each pixel unit in the same display area 100 may determine a specific connection position of the power signal line 200 connected to the mesh according to an actual position, so as to facilitate signal transmission between each pixel unit in the same display area 100 and the power signal line 200. The first pole of the light emitting device D is an anode, the pixel circuit 111 is connected to the first pole of the light emitting device D, the power signal line 200 is connected to the pixel circuit 111 or the anode of the light emitting device D, and the power signal line 200 supplies a positive voltage. Alternatively, the first pole of the light emitting device D is a cathode, the power signal line 200 is connected to the pixel circuit 111 or the cathode of the light emitting device D, and the power signal line 200 supplies a negative voltage.
It should be noted that, in the above embodiments, the power signal line partition control is exemplarily shown for one type of power signal line partition control, and the present invention is not limited thereto. In other embodiments, partition control may be provided for two power signal lines, and the partition control manner for the two power signal lines may be the same or different.
In the above embodiments, the display area may be divided according to various bases, and may be divided according to needs in practical applications. Illustratively, the average preset brightness of at least two display regions 100 is different, and the brightness of the display regions 100 is associated with the average preset brightness; and/or the loss of the power signal line 200 is different for at least two display areas 100, and the brightness of the display areas 100 is related to the loss of the power signal line 200.
The correlation between the brightness of the display area 100 and the average preset brightness means that the larger the average preset brightness of the display area 100 is, the larger the brightness of the display area 100 is correspondingly. At this time, the voltage value of the power signal is matched with the average preset brightness of the display area 100, i.e., the voltage value of the power signal line 200 corresponding to the display area 100 can be set according to the average preset brightness of the display area 100. The embodiment of the invention is arranged in such a way that the set voltage value can be ensured to be matched with the brightness of the display area 100. The correlation between the luminance of the display area 100 and the loss of the power signal line 200 means that the larger the loss of the power signal line 200, the smaller the luminance of the display area 100 accordingly. At this time, the voltage value of the power signal line is matched with the loss of the power signal line 200, and the voltage value of the power signal line 200 may be set according to the loss of the power signal line 200 corresponding to the display area 100, so as to ensure that the set voltage value is matched with the luminance of the display area 100.
Fig. 7 is a schematic structural diagram of another display panel according to an embodiment of the present invention. Referring to fig. 7, the power signal lines 200 may alternatively overlap with edges of the corresponding electrode blocks 300. The voltage of the power signal line 200 lapped at the edge of the electrode block 300 is transferred to the electrode block 300 to supply the power signal to the corresponding display area 100 through the power signal line 200. The power signal line 200 is directly lapped with the edge of the corresponding electrode block 300 without other complicated lapping designs, the lapping mode is simple and easy to realize, and the transmission of the power signal is convenient. Alternatively, each electrode block 300 has the same size as the corresponding display area 100, and each power signal line 200 adjusts the wiring shape according to the position of the corresponding electrode block 300.
Fig. 8 is a schematic structural diagram of another display panel according to an embodiment of the present invention. Referring to fig. 8, in one embodiment of the present invention, at least two display regions 100 are optionally arranged in an array. Illustratively, at least two display regions 100 are arranged in 7 rows and 4 columns, at least two display regions 100 are respectively provided with a respective power signal line, the display area of the display regions 100 is smaller, the required driving current is reduced, so that the IR-Drop is reduced, and the brightness uniformity of the display panel is further increased. The number of rows and columns and the area size of the at least two display regions 100 arranged in an array may be specifically set according to the actual situation, and are not limited herein.
It should be noted that, the shape of the display area 100 is exemplarily shown in fig. 8 as a rectangle, which is not a limitation of the present invention, in other embodiments, the shape of the display area 100 may also include at least one of a rectangle, a circle, a diamond, an ellipse, or a triangle, and the specific shape of the display area 100 may be set according to actual requirements.
Fig. 9 is a schematic structural diagram of another display panel according to an embodiment of the present invention, and fig. 10 is a schematic structural diagram of another display panel according to an embodiment of the present invention. Referring to fig. 9 and 10, in one embodiment of the present invention, optionally, the at least two display areas 100 include at least one first display area 120 and at least one second display area 130, the at least one first display area 120 is located in the middle of the display panel, and the at least one second display area 130 surrounds the at least one first display area 120.
It should be noted that, although fig. 9 and 10 exemplarily show that the first display area 120 and the second display area 130 are rectangular in shape, the present invention is not limited thereto, and in other embodiments, the shape of the second display area 130 and the shape of the first display area 120 may also include at least one of a rectangle, a circle, a diamond, an ellipse, or a triangle. The shape of the first display area 120 and the shape of the second display area 130 can be specifically set according to actual requirements.
Fig. 11 is a schematic structural diagram of another display panel according to an embodiment of the present invention. Referring to fig. 11, in an embodiment of the present invention, the display panel optionally further includes a bending axis 400, the bending axis 400 is used for implementing a folding display of the display panel, and the at least two display regions 100 are respectively located at two sides of the bending axis 400. The display panel is a bendable display panel, the folding display is realized through the bending shaft 400, the display area 100 on one side of the bending shaft 400 can be set to display the picture, and the display area 100 on the other side of the bending shaft 400 does not display the picture. For example, the power signal lines 200 are arranged in a divisional manner for the second power signal lines VSS, the voltage value of the second power signal line VSS corresponding to the display region 100 on one side of the bending axis 400 may be set to match the display luminance, and the voltage value of the second power signal line VSS corresponding to the display region 100 on the other side of the bending axis 400 may be set to zero, or may be equal to the voltage value of the first power signal line VDD, so that the display regions 100 on both sides of the bending axis 400 may be respectively displayed and not displayed, and the power consumption of the display panel may be advantageously reduced.
In summary, compared with the prior art, in the embodiment of the present invention, at least two power signal lines 200 are respectively corresponding to at least two display areas 100, the power signal lines 200 are used for providing power signals to the corresponding display areas 100, and the voltage values of the power signal lines 200 are matched with the brightness of the corresponding display areas 100, so that the partition control of the power signals of the display panel is realized. Compared with the existing display panel, on one hand, the display area corresponding to one power supply signal line 200 is reduced, the number of pixels is reduced, the driving current on the power supply signal line 200 is reduced, and the IR-Drop is reduced, so that the brightness uniformity of the display panel is improved on the basis of reducing power consumption; on the other hand, according to the luminance requirements of at least two display regions 100, the voltage values of the corresponding power signal lines 200 can be set, which is beneficial to further reducing the power consumption of the display panel and also beneficial to improving the luminance uniformity of the display panel.
The embodiment of the invention also provides a driving method of the display panel, and the driving method of the display panel can be applied to the display panel provided by any embodiment of the invention. Fig. 12 is a flowchart of a driving method of a display panel according to an embodiment of the invention. With reference to fig. 1 and 12, the driving method includes the steps of:
and S110, determining the voltage value of the corresponding power signal line according to the brightness of at least two display areas.
Specifically, the voltage value of the power signal line 200 matches the luminance of the corresponding display area 100, i.e., the voltage value of the power signal line 200 is determined by the luminance of the corresponding display area 100. Illustratively, the luminance of at least two display regions 100 in the display panel is different, and the voltage value of the corresponding power signal line 200 may be determined according to the luminance of at least two display regions 100.
Optionally, the brightness of the display area 100 is associated with an average preset brightness; and/or the loss of the power signal line 200 is different for at least two display areas 100, and the brightness of the display areas 100 is related to the loss of the power signal line 200. The correlation between the brightness of the display area 100 and the average preset brightness means that the larger the average preset brightness of the display area 100 is, the larger the brightness of the display area 100 is correspondingly. At this time, the voltage value of the power signal is matched with the average preset brightness of the display area 100, i.e., the voltage value of the power signal line 200 corresponding to the display area 100 can be set according to the average preset brightness of the display area 100. The embodiment of the invention is arranged in such a way that the set voltage value can be ensured to be matched with the brightness of the display area 100. The correlation between the luminance of the display area 100 and the loss of the power signal line 200 means that the larger the loss of the power signal line 200, the smaller the luminance of the display area 100 accordingly. At this time, the voltage value of the power signal line is matched with the loss of the power signal line 200, and the voltage value of the power signal line 200 may be set according to the loss of the power signal line 200 corresponding to the display area 100, so as to ensure that the set voltage value is matched with the luminance of the display area 100.
And S120, receiving the voltage value by at least two power signal lines, and driving the display area to display the picture.
Illustratively, when the luminance of at least two display regions 100 in the display panel is different, the voltage values received by at least two power signal lines 200 are also different.
According to the driving method of the display panel provided by the embodiment of the invention, the voltage values of the corresponding power signal lines 200 are determined according to the brightness of at least two display areas 100, and the at least two power signal lines 200 receive the voltage values to drive the display areas 100 to display the picture, so that the partition control of the power signals of the display panel is realized. Compared with the existing driving method of the display panel, on one hand, the display area corresponding to one power signal line 200 is reduced, the number of pixels is reduced, the driving current on the power signal line 200 is reduced, and the IR-Drop is reduced, so that the brightness uniformity of the display panel is improved on the basis of reducing the power consumption; on the other hand, according to the luminance requirements of at least two display regions 100, the voltage values of the corresponding power signal lines 200 can be set, which is beneficial to further reducing the power consumption of the display panel and also beneficial to improving the luminance uniformity of the display panel.
The embodiment of the invention also provides a display device, which comprises the display panel according to any embodiment of the invention, and the display device can be a mobile phone, a computer, a tablet computer, an intelligent wearable device or other electronic equipment with a display function. The display device provided by the embodiment of the present invention includes the display panel provided by any of the above embodiments of the present invention, and thus has a corresponding structure and beneficial effects of the display panel, which are not described herein again.
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 changes, rearrangements 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 (10)
1. A display panel, comprising:
at least two display areas;
and the power supply signal lines are used for providing power supply signals to the corresponding display areas, and the voltage values of the power supply signal lines are matched with the brightness of the corresponding display areas.
2. The display panel according to claim 1, wherein an average preset luminance of at least two of the display regions is different, and the luminance of the display regions is associated with the average preset luminance;
and/or the loss of the power supply signal line is different for at least two display areas, and the brightness of the display areas is related to the loss of the power supply signal line.
3. The display panel according to claim 1, wherein the display region includes pixel units arranged in an array, the pixel units including pixel circuits and light emitting devices, the pixel circuits supplying driving currents to the light emitting devices to drive the light emitting devices to emit light;
wherein the power supply signal line is connected to the pixel circuit, or the power supply signal line is connected to the light emitting device.
4. The display panel according to claim 3, wherein the light-emitting device includes a first pole and a second pole, the first pole of the light-emitting device is connected to the pixel circuit, and the second pole of the light-emitting device is connected to the corresponding power signal line;
preferably, second poles of the light emitting devices located in the same display region share one electrode block connected to the corresponding power signal line;
preferably, the power signal line overlaps with an edge of the corresponding electrode block;
preferably, the first pole is an anode, the second pole is a cathode, and the power signal line provides negative voltage; alternatively, the first electrode is a cathode, the second electrode is an anode, and the power signal line provides a positive voltage.
5. The display panel according to claim 3, wherein the light emitting device includes a first pole, the first pole of the light emitting device is connected to the pixel circuit, and the power supply signal line is connected to the pixel circuit;
preferably, the power signal lines corresponding to the same display area are connected in a mesh shape;
preferably, the first electrode is an anode, and the power supply signal line provides a positive voltage; alternatively, the first electrode is a cathode and the power signal line provides a negative voltage.
6. The display panel according to claim 1, wherein at least two of the display regions are arranged in an array;
preferably, the shape of the display area includes at least one of a rectangle, a circle, a diamond, an ellipse, or a triangle.
7. The display panel according to claim 1, wherein the at least two display regions comprise at least one first display region and at least one second display region, the at least one first display region being located in a middle portion of the display panel, the at least one second display region surrounding the at least one first display region;
optionally, the shape of the second display area and the shape of the first display area each comprise at least one of a rectangle, a circle, a diamond, an ellipse, or a triangle.
8. The display panel according to claim 1, further comprising a bending axis for implementing a folded display of the display panel, wherein at least two of the display regions are respectively located at two sides of the bending axis.
9. A driving method of a display panel for driving the display panel according to any one of claims 1 to 8, the driving method comprising:
determining the voltage value of the corresponding power signal line according to the brightness of at least two display areas;
at least two power signal lines receive the voltage value and drive the display area to display the picture.
10. A display device characterized by comprising the display panel according to any one of claims 1 to 8.
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| CN114373417A (en) * | 2022-01-17 | 2022-04-19 | 武汉华星光电半导体显示技术有限公司 | Display device and electronic apparatus |
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