CN112908254A - Display panel, brightness compensation method of display panel and display device - Google Patents
Display panel, brightness compensation method of display panel and display device Download PDFInfo
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- CN112908254A CN112908254A CN202110120847.3A CN202110120847A CN112908254A CN 112908254 A CN112908254 A CN 112908254A CN 202110120847 A CN202110120847 A CN 202110120847A CN 112908254 A CN112908254 A CN 112908254A
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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
- G09G2320/00—Control of display operating conditions
- G09G2320/04—Maintaining the quality of display appearance
- G09G2320/043—Preventing or counteracting the effects of ageing
- G09G2320/046—Dealing with screen burn-in prevention or compensation of the effects thereof
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Abstract
The embodiment of the invention discloses a display panel, a brightness compensation method of the display panel and a display device. The display panel comprises a display area and a frame area; the display area comprises a plurality of first sub-pixels arranged in an array mode, the frame area comprises a plurality of second sub-pixels, and one second sub-pixel corresponds to at least one first sub-pixel; the frame area further comprises a driving chip, the first sub-pixel and the second sub-pixel are connected with the driving chip, and the driving chip is used for driving the first sub-pixel and the second sub-pixel to emit light in the display stage; the frame area also comprises a plurality of detection units which are in one-to-one correspondence with the second sub-pixels, and the detection units are used for detecting the brightness attenuation of the second sub-pixels in the detection stage; the driving chip is further used for compensating the light emitting brightness of the first sub-pixel corresponding to the second sub-pixel according to the brightness attenuation value of each second sub-pixel detected by the detection unit. The display panel provided by the embodiment of the invention can perform brightness compensation according to the brightness attenuation of the light-emitting element so as to improve the display effect.
Description
Technical Field
Embodiments of the present invention relate to display technologies, and in particular, to a display panel, a method for compensating brightness of the display panel, and a display device.
Background
With the development of Display technology, Organic Light Emitting Diode (OLED) displays have been increasingly widely used in the Display field due to their advantages of active Light emission, wide viewing angle, high contrast, low power consumption, fast response speed, etc., and gradually replace the conventional Liquid Crystal Display (LCD).
Since the OLED is a current-driven element, the voltage across the two ends of the OLED increases with the increase of the use time, that is, the current flowing through the OLED decreases, so that the OLED has reduced brightness with the increase of the operation time, which affects the display effect.
Disclosure of Invention
The embodiment of the invention provides a display panel, a brightness compensation method of the display panel and a display device.
In a first aspect, an embodiment of the present invention provides a display panel, including a display area and a frame area;
the display area comprises a plurality of first sub-pixels arranged in an array mode, the frame area comprises a plurality of second sub-pixels, and one second sub-pixel corresponds to at least one first sub-pixel;
the frame area further comprises a driving chip, the first sub-pixel and the second sub-pixel are both connected with the driving chip, and the driving chip is used for driving the first sub-pixel and the second sub-pixel to emit light in a display stage;
the frame area further comprises a plurality of detection units which are in one-to-one correspondence with the second sub-pixels, and the detection units are used for detecting the brightness attenuation of the second sub-pixels in a detection stage;
the driving chip is further configured to compensate the light emitting brightness of the first sub-pixel corresponding to the second sub-pixel according to the brightness attenuation value of each second sub-pixel detected by the detection unit.
In a second aspect, an embodiment of the present invention further provides a brightness compensation method for a display panel, which is implemented by using any one of the display panels described above, where the display panel includes a display area and a frame area; the display area comprises a plurality of first sub-pixels arranged in an array mode, the frame area comprises a plurality of second sub-pixels, and one second sub-pixel corresponds to at least one first sub-pixel; the frame area further comprises a driving chip and a plurality of detection units which are in one-to-one correspondence with the second sub-pixels, and the brightness compensation method of the display panel comprises the following steps:
in a display stage, the driving chip drives the first sub-pixel and the second sub-pixel to emit light;
in the detection phase, the detection unit detects the brightness attenuation of the second sub-pixels, and the driving chip compensates the brightness of the first sub-pixels corresponding to the second sub-pixels according to the brightness attenuation value of each second sub-pixel detected by the detection unit.
In a third aspect, an embodiment of the present invention further provides a display device, including any one of the display panels described above.
The display panel provided by the embodiment of the invention comprises a display area and a frame area; the display area comprises a plurality of first sub-pixels arranged in an array mode, the frame area comprises a plurality of second sub-pixels, and one second sub-pixel corresponds to at least one first sub-pixel; the frame area further comprises a driving chip, the first sub-pixel and the second sub-pixel are connected with the driving chip, and the driving chip is used for driving the first sub-pixel and the second sub-pixel to emit light in the display stage; the frame area also comprises a plurality of detection units which are in one-to-one correspondence with the second sub-pixels, and the detection units are used for detecting the brightness attenuation of the second sub-pixels in the detection stage; the driving chip is further used for compensating the light emitting brightness of the first sub-pixel corresponding to the second sub-pixel according to the brightness attenuation value of each second sub-pixel detected by the detection unit. The display method comprises the steps that a plurality of first sub-pixels arranged in an array mode are arranged in a display area, and the first sub-pixels are used for achieving picture display; a plurality of second sub-pixels are arranged in the frame area, one second sub-pixel corresponds to at least one first sub-pixel, and the second sub-pixels are used as detection sub-pixels for detecting the brightness attenuation of the light-emitting element; in the display stage, the first sub-pixel and the second sub-pixel are driven by the driving chip to emit light in the same working state; in the detection stage, the brightness attenuation of the second sub-pixel is detected through the detection unit, and the working states of the first sub-pixel and the second sub-pixel are the same when the first sub-pixel and the second sub-pixel are displayed, so that the display chip compensates the brightness of the corresponding first sub-pixel according to the brightness attenuation of the second sub-pixel, and the display effect is 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 a first sub-pixel according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a second sub-pixel according to an embodiment of the present invention;
FIG. 4 is a schematic diagram showing the relationship between the luminance decay rate and the cross-voltage variation of an OLED device;
fig. 5 is a schematic structural diagram of a first pixel circuit according to an embodiment of the present invention;
fig. 6 is a schematic circuit diagram of a first pixel circuit 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 partial structure diagram of a 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 flowchart illustrating a method for compensating brightness of a display panel according to an embodiment of the present invention;
fig. 11 is a schematic partial structure diagram of another display panel according to an embodiment of the present invention;
fig. 12 is a schematic structural diagram of a display device according to an embodiment of the present invention.
Detailed Description
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.
The terminology used in the embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. It should be noted that the terms "upper", "lower", "left", "right", and the like used in the description of the embodiments of the present invention are used in the angle shown in the drawings, and should not be construed as limiting the embodiments of the present invention. In addition, in this context, it is also to be understood that when an element is referred to as being "on" or "under" another element, it can be directly formed on "or" under "the other element or be indirectly formed on" or "under" the other element through an intermediate element. The terms "first," "second," and the like, are used for descriptive purposes only and not for purposes of limitation, and do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Fig. 1 is a schematic structural diagram of a display panel according to an embodiment of the present invention, and referring to fig. 1, the display panel according to the embodiment includes a display area 10 and a frame area 20; the display area 10 includes a plurality of first sub-pixels 11 arranged in an array, the frame area 20 includes a plurality of second sub-pixels 21, and one second sub-pixel 21 corresponds to at least one first sub-pixel 11; the frame area 20 further includes a driving chip 22, the first sub-pixel 11 and the second sub-pixel 21 are both connected to the driving chip 22 (not shown in fig. 1), and the driving chip 22 is configured to drive the first sub-pixel 11 and the second sub-pixel 21 to emit light during the display phase; the frame area 20 further includes a plurality of detecting units 23 corresponding to the second sub-pixels 21 one by one, and the detecting units 23 are configured to detect the brightness attenuation of the second sub-pixels 21 in the detecting stage; the driving chip 22 is further configured to compensate the light emitting luminance of the first sub-pixel 11 corresponding to the second sub-pixel 21 according to the luminance attenuation value of each second sub-pixel 21 detected by the detecting unit 23.
Fig. 1 schematically shows that the display panel is rectangular, the frame region 20 includes an upper frame 20a, a left frame 20b, a lower frame 20c, and a right frame 20d, wherein the second sub-pixel 21 and the detection unit 23 are schematically disposed on the upper frame 20a, and the driving chip is schematically disposed on the lower frame 20 c. It is understood that, due to the limited space of the frame region, the number of the first sub-pixels 11 in the display region 10 is larger, and one second sub-pixel 21 may correspond to a plurality of first sub-pixels 11, for example, one second sub-pixel 21 corresponds to 16 first sub-pixels 11, one second sub-pixel 21 corresponds to 25 first sub-pixels 11, and the like, which is not limited in the embodiment of the present invention. Since the display panel generally needs to realize color display, the first sub-pixel 11 and the second sub-pixel 21 may include three kinds of sub-pixels: a red sub-pixel R emitting red light, a green sub-pixel G emitting green light, and a blue sub-pixel B emitting blue light, and one sub-pixel may include an organic light emitting diode OLED. In other embodiments, the first sub-pixel 11 and the second sub-pixel 21 are not limited to a combination of sub-pixels of three primary colors RGB. For example, the first subpixel 11 and the second subpixel 21 may include a white subpixel W emitting white light to increase brightness, or may include at least one subpixel emitting complementary color light to expand a color reproduction range. When the display panel works normally, the first sub-pixel 11 and the second sub-pixel 21 both emit light to realize synchronous attenuation, the brightness attenuation of the second sub-pixel 21 is detected through the detection unit 23 during detection, the attenuation value of the second sub-pixel 21 is taken as the attenuation value of the corresponding first sub-pixel 11, and the driving chip 22 compensates the light emitting brightness of the first sub-pixel 11 according to the attenuation value. In a specific implementation, the detecting unit 23 may be a voltage obtaining circuit, configured to obtain a voltage between an anode and a cathode of the OLED, and obtain the brightness attenuation of the second sub-pixel 21 according to the voltage. The structure of the specific voltage obtaining circuit is not limited, and the specific voltage obtaining circuit may be designed in the frame region 20, and may also be integrated inside the driving chip 22, and may be selected according to actual situations in specific implementation. In other embodiments, the detecting unit 23 may also include a photosensor, and the luminance attenuation of the second sub-pixel 21 is obtained by obtaining the luminance of the second sub-pixel 21 at a certain standard current.
According to the technical scheme of the embodiment of the invention, a plurality of first sub-pixels which are arranged in an array mode are arranged in a display area, and the first sub-pixels are used for realizing picture display; a plurality of second sub-pixels are arranged in the frame area, one second sub-pixel corresponds to at least one first sub-pixel, and the second sub-pixels are used as detection sub-pixels for detecting the brightness attenuation of the light-emitting element; in the display stage, the first sub-pixel and the second sub-pixel are driven by the driving chip to emit light in the same working state; in the detection stage, the brightness attenuation of the second sub-pixel is detected through the detection unit, and the working states of the first sub-pixel and the second sub-pixel are the same when the first sub-pixel and the second sub-pixel are displayed, so that the display chip compensates the brightness of the corresponding first sub-pixel according to the brightness attenuation of the second sub-pixel, and the display effect is improved.
On the basis of the foregoing embodiment, fig. 2 is a schematic structural diagram of a first sub-pixel according to an embodiment of the present invention, and referring to fig. 2, optionally, the first sub-pixel 11 includes a first light emitting element 111 and a first pixel circuit 112, and the first pixel circuit 112 is configured to drive the first light emitting element 111 to emit light; fig. 3 is a schematic structural diagram of a second sub-pixel according to an embodiment of the present invention, referring to fig. 3, the second sub-pixel 21 includes a second light emitting element 211 and a second pixel circuit 212, and the second pixel circuit 212 is used for driving the second light emitting element 211 to emit light; a first end of the detecting unit 23 is connected to the anode of the second light emitting element 211, a second end of the detecting unit 23 is connected to the cathode of the second light emitting element 212, and the detecting unit 23 is configured to detect a voltage between the anode and the cathode of the second light emitting element 212 in a detecting stage to obtain a brightness decay of the second sub-pixel 21.
In the embodiment of the present invention, the first light emitting element 111 and the second light emitting element 211 may be OLEDs with the same material and the same structure, each OLED includes an anode, a cathode, and a light emitting layer located between the anode and the cathode, and in some embodiments, each OLED may further include a functional film layer such as an electron transport layer and a hole transport layer, and only the first light emitting element 111 and the second light emitting element 211 need to be the same. The first pixel circuit 112 and the second pixel circuit 212 have the same structure, and may be, for example, a 2T1C structure including two transistors and one capacitor as shown in fig. 2 and 3, and in other embodiments, a driving circuit with threshold compensation may be provided, for example, a 7T1C structure including seven transistors and one capacitor. The detection unit 23 may include a voltage detection circuit (a specific structure is not shown in fig. 3) for detecting a voltage between the anode and the cathode of the second light emitting element 211.
It is understood that under constant current conditions, the luminance of an OLED gradually decreases as the operating time increases, while the voltage across the anode and cathode of the OLED increases as the luminance decreases. Research shows that, under the same device material and structure, the rate of brightness reduction and the cross-voltage have a relatively stable relationship, schematically, fig. 4 is a schematic diagram of the relationship between the brightness attenuation rate of an OLED device and the change of the cross-voltage, where a curve a is the brightness attenuation ratio of the brightness of the OLED along with the operating time, and a curve b is the change of the cross-voltage along with the time, and in the specific implementation, the corresponding relationship between the brightness attenuation and the cross-voltage is measured in advance under the standard condition, and then the cross-voltage obtains the brightness attenuation of the OLED according to the cross-voltage, so as to realize the compensation of the brightness attenuation.
The pixel circuits shown in fig. 2 and 3 are exemplified by 2T1C, and in other embodiments, a pixel circuit with threshold compensation may be used to improve the stability of light emitted from the light emitting element. Fig. 5 is a schematic structural diagram of a first pixel circuit according to an embodiment of the present invention, and referring to fig. 5, optionally, the first pixel circuit according to the embodiment includes: the driving module 1, wherein the control end a1 of the driving module 1 is electrically connected with the first node N1; a first initialization block 2, a control terminal a1 of the first initialization block 2 being electrically connected to a first scan signal line S1, a first terminal a2 of the first initialization block 2 being electrically connected to a first reference signal line Ref1, and a second terminal a3 of the first initialization block 2 being electrically connected to a first node N1; a threshold compensation module 3, wherein a control terminal a1 of the threshold compensation module 3 is electrically connected to the second scan signal line S2, a first terminal a2 of the threshold compensation module 3 is electrically connected to a second terminal a3 of the driving module 1, and a second terminal a2 of the threshold compensation module 3 is electrically connected to the first node N1; a Data writing module 4, the Data writing module 4 being configured to write the Data signal provided by the Data signal line Data into the first node N1; a memory module 5, a first terminal c1 of the memory module 5 being electrically connected to the first power signal line VDD, and a second terminal c2 of the memory module 5 being electrically connected to the first node N1; the driving chip compensates the light emitting brightness of the first sub-pixel by changing the power voltage supplied by the first power signal line VDD and/or changing the Data voltage supplied by the Data signal line Data.
It is understood that the first pixel circuit and the second pixel circuit in this embodiment may have the same structure, and both may be pixel circuits with threshold compensation, and the driving of the OLED by the first pixel circuit generally includes three stages, namely, an initialization stage, a data writing stage, and a light emitting stage. The driving module 1 is used for providing a driving current to the organic light emitting structure OLED, and the OLED responds to the driving current to emit light; the first initialization module 2 is used for initializing the potential of the first terminal a2 of the driving module 1 in an initialization phase; the threshold compensation module 3 is used for writing a compensation signal into the control terminal a1 of the driving module 1 before the light-emitting phase; the memory module 5 is used to maintain the potential of the control terminal a1 of the driving module 1 in the light emitting phase. The OLED is a current driving element, and supplies a power voltage through a first power signal line VDD, and controls the current output by the driving module 1 through a data signal to realize the adjustment of the luminance of the OLED. And after the second light-emitting element works for a period of time, at least one of the power supply voltage or the data voltage is changed by the driving chip according to the corresponding relation between the predetermined brightness attenuation and the voltage across by measuring the voltage across the anode and the cathode, so that the brightness of the first light-emitting element is compensated.
Optionally, with continued reference to fig. 5, the first pixel circuit further includes: a second initializing module 6, a control terminal a1 of the second initializing module 6 being electrically connected to the second scan signal line S2, a first terminal a2 of the second initializing module 6 being electrically connected to the second reference signal line Ref2, a second terminal a3 of the second initializing module 6 being electrically connected to the first electrode D1 of the organic light emitting structure OLED, the second initializing module 6 being configured to initialize a potential of the first electrode D1 of the organic light emitting structure OLED in an initializing stage; a first light emission control module 7, wherein a control end a1 of the first light emission control module 7 is electrically connected to the enable signal line Emit, a first end a2 of the first light emission control module 7 is electrically connected to the first power signal line VDD, and a second end a3 of the first light emission control module 7 is electrically connected to the first end a2 of the driving module 1; and/or the second light emission control module 8, wherein the control end a1 of the second light emission control module 8 is electrically connected to the enable signal line Emit, the first end a2 of the second light emission control module 8 is electrically connected to the second end a3 of the driving module, the second end a3 of the second light emission control module 8 is electrically connected to the first electrode D1 of the organic light emitting structure OLED, and the second electrode D2 of the organic light emitting structure OLED is electrically connected to the second power signal line VSS.
It is understood that the first light emitting control module 7 and/or the second light emitting control module 8 are configured to be turned on during the light emitting period to control the organic light emitting structure OLED to emit light. The first electrode D1 of the organic light emitting structure OLED is an anode, the second electrode D2 is a cathode, the first power signal line VDD provides an anode voltage, and the second power signal line VSS provides a cathode voltage.
Exemplarily, fig. 6 is a schematic diagram of a specific circuit structure of a pixel circuit according to an embodiment of the present invention, and referring to fig. 6, optionally, the driving module 1 includes a driving transistor T0, the first initialization module 2 includes a first transistor T1, the threshold compensation module 3 includes a second transistor T2, the data writing module 4 includes a third transistor T3, the first light emission control module 7 includes a fourth transistor T4, the second light emission control module 8 includes a fifth transistor T5, the second initialization module 6 includes a sixth transistor T6, and the storage module 5 includes a first capacitor C1; in the present embodiment, the first transistor T1 and the second transistor T2 are double gate transistors.
Since the non-display area of the display panel occupies a small area, the number of the second sub-pixels that can be set is limited, and thus one second sub-pixel can be set to correspond to a plurality of first sub-pixels. Fig. 7 is a schematic structural diagram of another display panel according to an embodiment of the present invention, and referring to fig. 7, optionally, the display area 10 includes a plurality of first sub-display areas 101 arranged in an array, and the first sub-display areas 101 include a plurality of first sub-pixels (not shown in fig. 7); the first sub-pixel in the same first sub-display region 101 corresponds to one second sub-pixel 21.
It is understood that, it is only schematic that each first sub-display area 101 is shown in fig. 7 as being square, each first sub-display area 101 may include a plurality of first sub-pixels arranged in an array, in other embodiments, one first sub-display area 101 may also be long, for example, the first sub-display area 101 includes a plurality of first sub-pixels in a column, and the arrangement of the first sub-pixels in the embodiment of the present invention is not limited, and may be designed according to actual situations when implemented.
Because a camera is generally arranged on a display device such as a mobile phone and a flat panel, a semi-transparent area can be arranged in a display area for arranging the camera along with pursuit of people for high screen ratio. Fig. 8 is a schematic view of a partial structure of a display panel according to an embodiment of the present invention, referring to fig. 8, optionally, the display area 10 includes a first display area 110 and a second display area 120, and the second display area 120 is reused as a light sensing element setting area; one second sub-pixel 21 corresponds to at least one first sub-pixel (not shown in fig. 8) located in the second display region 120.
The light sensing element may be a camera, and the second display area 120 may be provided with a plurality of light transmitting areas for transmitting light required for imaging by the camera. Optionally, in specific implementation, in order to ensure an imaging effect of the camera, the pixel density of the second display area 120 may be set to be smaller than the pixel density of the first display area 110, for example, the pixel density of the second display area 120 is set to be 1/4 of the pixel density of the first display area, and the specific implementation may be designed according to actual situations.
Similar to the first display region, the second display region may also be provided with a plurality of first sub-pixels corresponding to one second sub-pixel, and with reference to fig. 8, optionally, the second display region 120 includes a plurality of second sub-display regions 121 arranged in an array, and the second sub-display regions 121 include a plurality of first sub-pixels; the first sub-pixels in the same second sub-display area 121 correspond to one second sub-pixel 21, which is beneficial to monitoring all the first sub-pixels by using a small number of second sub-pixels and avoiding an overlarge frame area.
Optionally, the frame region further includes a light-shielding layer for shielding light emitted from the second sub-pixel.
It can be understood that when the cross voltage of the light emitting element in the second sub-pixel is detected, the second sub-pixel is in a light emitting state, and in most cases, the light emission of the second sub-pixel is an abnormal condition, so that the light shielding layer can be arranged above the second sub-pixel to shield the light of the second sub-pixel, thereby preventing the light emitted by the second sub-pixel from being visible.
In another embodiment, the second sub-pixel may not be occluded, and the blinking indication information of the second sub-pixel may be used, for example, as a breathing light. Optionally, the frame area includes a breathing lamp setting area, and the second sub-pixels are disposed in the breathing lamp setting area.
Optionally, the second sub-pixel and the driving chip are disposed in the same frame region.
For example, fig. 9 is a schematic structural diagram of another display panel according to an embodiment of the present invention, referring to fig. 9, the second sub-pixel 21 and the driving chip 22 are both disposed on a lower frame 20c of the frame region, and since the detection unit 23 needs to be connected to the driving chip 22 or is embedded in the driving chip 22, disposing the second sub-pixel 21 and the driving chip 22 in the same frame region is beneficial to simplifying the routing of the display panel and reducing the cost of the display panel.
The embodiment of the invention also provides a brightness compensation method of a display panel, which is implemented by adopting any one of the display panels provided by the embodiments, wherein the display panel comprises a display area and a frame area; the display area comprises a plurality of first sub-pixels arranged in an array mode, the frame area comprises a plurality of second sub-pixels, and one second sub-pixel corresponds to at least one first sub-pixel; the frame area further comprises a driving chip and a plurality of detection units which are in one-to-one correspondence with the second sub-pixels. Fig. 10 is a flowchart illustrating a luminance compensation method of a display panel according to an embodiment of the present invention, and referring to fig. 10, the luminance compensation method of the display panel according to the embodiment includes:
and S110, in the display stage, the driving chip drives the first sub-pixel and the second sub-pixel to emit light.
Optionally, one second sub-pixel corresponds to n first sub-pixels; in the display stage, the driving chip drives the second sub-pixels to emit light with a preset gray scale, wherein the preset gray scale is an average gray scale of the n first sub-pixels corresponding to the second sub-pixels when the n first sub-pixels are displayed; wherein n is an integer greater than or equal to 2.
For example, taking n ═ 2 as an example, fig. 11 is a schematic partial structure diagram of another display panel provided in the embodiment of the present invention, in which the second sub-pixel 21 in the non-display area corresponds to two first sub-pixels 11 and 11 ', respectively, the second sub-pixel is connected to the normal shift register vsr (Gate) for driving, if a row of non-display area sub-pixels is added in fig. 11, a row of Gate for driving is added, if the Gate1 is turned on, the Source signal does not send the display data of the first row, but sends the display data of the first sub-pixel in the area to be compensated, if the second sub-pixel 21 in fig. 11 sends the data signals corresponding to the gray scales of the average brightness of the first sub-pixel 11 and the first sub-pixel 11 ', and the degree of life attenuation of the second sub-pixel 21 is consistent with the degree of average attenuation of the first sub-pixel 11 and the first sub-pixel 11 ' 2. In specific implementation, the initial voltage can be measured and recorded in a register of the driving chip before delivery. Before each lighting, the Gate1 is controlled to collect the voltage of the anode of the OLED of the second sub-pixel in the non-display area, and the collection line and the Source line (S1-S4 in fig. 11) can be multiplexed or wired separately, so as to obtain the attenuation condition of the first sub-pixel. For example, the voltage detected at each time of starting up is compared with the voltage at the time of leaving factory to obtain the attenuation amount for brightness compensation, the attenuation amount is detected at each time of starting up, and the attenuation amount is used for compensation and display after starting up.
And S120, in the detection stage, the detection unit detects the brightness attenuation of the second sub-pixels, and the driving chip compensates the brightness of the first sub-pixels corresponding to the second sub-pixels according to the brightness attenuation value of each second sub-pixel detected by the detection unit.
Optionally, the second sub-pixel includes a second light emitting element and a second pixel circuit, the second pixel circuit is configured to drive the second light emitting element to emit light, the first end of the detection unit is connected to an anode of the second light emitting element, the second end of the detection unit is connected to a cathode of the second light emitting element, and the detection unit is configured to detect a voltage between the anode and the cathode of the second light emitting element, so as to obtain a brightness attenuation of the second sub-pixel.
For example, referring to fig. 4, in a specific implementation, the relationship between the luminance decay of the second sub-pixel and the voltage between the anode and the cathode may be pre-stored in the driving chip; in the detection stage, the driving chip calculates the brightness compensation quantity according to the difference value between the initial voltage value and the measured voltage value between the anode and the cathode of the second light-emitting element. Then, the driving chip compensates at least one of the power voltage and the data voltage according to the brightness compensation amount so as to improve the brightness of the first light-emitting element and improve the display effect.
Fig. 12 is a schematic structural diagram of a display device according to an embodiment of the present invention. Referring to fig. 12, the display device 100 includes any one of the display panels 200 according to the embodiments of the present invention. The display device 100 may be a mobile phone, a computer, an intelligent wearable device, and the like.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious modifications, rearrangements, combinations and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (14)
1. A display panel is characterized by comprising a display area and a frame area;
the display area comprises a plurality of first sub-pixels arranged in an array mode, the frame area comprises a plurality of second sub-pixels, and one second sub-pixel corresponds to at least one first sub-pixel;
the frame area further comprises a driving chip, the first sub-pixel and the second sub-pixel are both connected with the driving chip, and the driving chip is used for driving the first sub-pixel and the second sub-pixel to emit light in a display stage;
the frame area further comprises a plurality of detection units which are in one-to-one correspondence with the second sub-pixels, and the detection units are used for detecting the brightness attenuation of the second sub-pixels in a detection stage;
the driving chip is further configured to compensate the light emitting brightness of the first sub-pixel corresponding to the second sub-pixel according to the brightness attenuation value of each second sub-pixel detected by the detection unit.
2. The display panel according to claim 1, wherein the first sub-pixel comprises a first light-emitting element and a first pixel circuit for driving the first light-emitting element to emit light;
the second sub-pixel comprises a second light-emitting element and a second pixel circuit, and the second pixel circuit is used for driving the second light-emitting element to emit light;
the first end of the detection unit is connected with the anode of the second light-emitting element, the second end of the detection unit is connected with the cathode of the second light-emitting element, and the detection unit is used for detecting the voltage between the anode and the cathode of the second light-emitting element in a detection stage so as to obtain the brightness attenuation of the second sub-pixel.
3. The display panel according to claim 2, wherein the first pixel circuit comprises:
the control end of the driving module is electrically connected with the first node;
a control end of the first initialization module is electrically connected with a first scanning signal line, a first end of the first initialization module is electrically connected with a first reference signal line, and a second end of the first initialization module is electrically connected with the first node;
a control end of the threshold compensation module is electrically connected with a second scanning signal line, a first end of the threshold compensation module is electrically connected with a second end of the driving module, and a second end of the threshold compensation module is electrically connected with the first node;
a data write module for writing a data signal provided by a data signal line into the first node;
a memory module, a first end of the memory module being electrically connected to a first power signal line, a second end of the memory module being electrically connected to the first node;
the driving chip compensates the light emitting brightness of the first sub-pixel by changing the power supply voltage provided by the first power supply signal line and/or changing the data voltage provided by the data signal line.
4. The display panel according to claim 1, wherein the display region comprises a first display region and a second display region, and the second display region is reused as a light-sensing element arrangement region;
one of the second sub-pixels corresponds to at least one of the first sub-pixels located in the second display region.
5. The display panel according to claim 4, wherein the second display region comprises a plurality of second sub-display regions arranged in an array, and the second sub-display regions comprise a plurality of first sub-pixels;
the first sub-pixel in the same second sub-display region corresponds to one second sub-pixel.
6. The display panel according to claim 1, wherein the display region comprises a plurality of first sub-display regions arranged in an array, the first sub-display regions comprising a plurality of first sub-pixels;
the first sub-pixel in the same first sub-display area corresponds to one second sub-pixel.
7. The display panel according to claim 1, wherein the frame region further comprises a light-shielding layer for shielding light emitted from the second sub-pixel.
8. The display panel according to claim 1, wherein the frame region comprises a breathing lamp setting region, and the second sub-pixel is disposed in the breathing lamp setting region.
9. The display panel of claim 1, wherein the second sub-pixel and the driving chip are disposed in a same frame region.
10. A method for compensating brightness of a display panel, the method being performed by the display panel according to any one of claims 1 to 9, wherein the display panel comprises a display area and a frame area; the display area comprises a plurality of first sub-pixels arranged in an array mode, the frame area comprises a plurality of second sub-pixels, and one second sub-pixel corresponds to at least one first sub-pixel; the frame area further comprises a driving chip and a plurality of detection units which are in one-to-one correspondence with the second sub-pixels, and the brightness compensation method of the display panel comprises the following steps:
in a display stage, the driving chip drives the first sub-pixel and the second sub-pixel to emit light;
in the detection phase, the detection unit detects the brightness attenuation of the second sub-pixels, and the driving chip compensates the brightness of the first sub-pixels corresponding to the second sub-pixels according to the brightness attenuation value of each second sub-pixel detected by the detection unit.
11. The luminance compensation method of a display panel according to claim 10, wherein one of the second sub-pixels corresponds to n of the first sub-pixels;
in a display stage, the driving chip drives the second sub-pixels to emit light with a preset gray scale, wherein the preset gray scale is an average gray scale of the n first sub-pixels corresponding to the second sub-pixels when the n first sub-pixels are displayed;
wherein n is an integer greater than or equal to 2.
12. The luminance compensation method of a display panel according to claim 11, wherein the second sub-pixel includes a second light emitting element and a second pixel circuit, the second pixel circuit is configured to drive the second light emitting element to emit light, a first end of the detection unit is connected to an anode of the second light emitting element, a second end of the detection unit is connected to a cathode of the second light emitting element, and the detection unit is configured to detect a voltage between the anode and the cathode of the second light emitting element to obtain the luminance decay of the second sub-pixel.
13. The luminance compensation method of a display panel according to claim 12, wherein the driving chip prestores an initial voltage value between an anode and a cathode of the second light emitting element;
in the detection stage, the driving chip calculates the brightness compensation quantity according to the difference value between the initial voltage value and the measured voltage value between the anode and the cathode of the second light-emitting element.
14. A display device comprising the display panel according to any one of claims 1 to 9.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113707085A (en) * | 2021-08-03 | 2021-11-26 | 芯颖科技有限公司 | Display screen brightness compensation device and method at sub-pixel level and display screen |
| CN114927099A (en) * | 2022-06-15 | 2022-08-19 | 京东方科技集团股份有限公司 | Display panel, driving method thereof and display device |
| CN115762403A (en) * | 2022-12-19 | 2023-03-07 | 惠科股份有限公司 | Luminance compensation method, luminance compensation device and display device |
| CN116072070A (en) * | 2022-11-04 | 2023-05-05 | 厦门天马显示科技有限公司 | Display panel, driving method thereof and display device |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040070558A1 (en) * | 2000-05-24 | 2004-04-15 | Eastman Kodak Company | OLED display with aging compensation |
| CN105280139A (en) * | 2015-11-11 | 2016-01-27 | 深圳市华星光电技术有限公司 | AMOLED brightness compensation method and AMOLED driving system |
| CN110364114A (en) * | 2019-07-19 | 2019-10-22 | 上海天马微电子有限公司 | Display panel and its luminance compensation method, display device |
| CN110992894A (en) * | 2019-12-10 | 2020-04-10 | 武汉天马微电子有限公司 | Display compensation circuit, method, display panel and display device |
| CN111902857A (en) * | 2017-09-21 | 2020-11-06 | 苹果公司 | OLED voltage driver with current-voltage compensation |
| CN111986620A (en) * | 2020-09-10 | 2020-11-24 | 武汉天马微电子有限公司 | Pixel driving circuit, driving method thereof, display panel and display device |
-
2021
- 2021-01-28 CN CN202110120847.3A patent/CN112908254A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040070558A1 (en) * | 2000-05-24 | 2004-04-15 | Eastman Kodak Company | OLED display with aging compensation |
| CN105280139A (en) * | 2015-11-11 | 2016-01-27 | 深圳市华星光电技术有限公司 | AMOLED brightness compensation method and AMOLED driving system |
| CN111902857A (en) * | 2017-09-21 | 2020-11-06 | 苹果公司 | OLED voltage driver with current-voltage compensation |
| CN110364114A (en) * | 2019-07-19 | 2019-10-22 | 上海天马微电子有限公司 | Display panel and its luminance compensation method, display device |
| CN110992894A (en) * | 2019-12-10 | 2020-04-10 | 武汉天马微电子有限公司 | Display compensation circuit, method, display panel and display device |
| CN111986620A (en) * | 2020-09-10 | 2020-11-24 | 武汉天马微电子有限公司 | Pixel driving circuit, driving method thereof, display panel and display device |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113707085A (en) * | 2021-08-03 | 2021-11-26 | 芯颖科技有限公司 | Display screen brightness compensation device and method at sub-pixel level and display screen |
| CN114927099A (en) * | 2022-06-15 | 2022-08-19 | 京东方科技集团股份有限公司 | Display panel, driving method thereof and display device |
| CN114927099B (en) * | 2022-06-15 | 2023-12-22 | 京东方科技集团股份有限公司 | Display panel, driving method thereof and display device |
| CN116072070A (en) * | 2022-11-04 | 2023-05-05 | 厦门天马显示科技有限公司 | Display panel, driving method thereof and display device |
| CN115762403A (en) * | 2022-12-19 | 2023-03-07 | 惠科股份有限公司 | Luminance compensation method, luminance compensation device and display device |
| CN115762403B (en) * | 2022-12-19 | 2024-02-02 | 惠科股份有限公司 | Brightness compensation method, brightness compensation device and display device |
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