CN110853559B - Detection control circuit and detection control method of display panel and display panel - Google Patents

Detection control circuit and detection control method of display panel and display panel Download PDF

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Publication number
CN110853559B
CN110853559B CN201911364711.6A CN201911364711A CN110853559B CN 110853559 B CN110853559 B CN 110853559B CN 201911364711 A CN201911364711 A CN 201911364711A CN 110853559 B CN110853559 B CN 110853559B
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detection
module
sub
pixel driving
data
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CN110853559A (en
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解红军
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Yungu Guan Technology Co Ltd
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Yungu Guan Technology Co Ltd
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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
    • G09G3/006—Electronic inspection or testing of displays and display drivers, e.g. of LED or LCD displays
    • 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
    • G09G3/2007—Display of intermediate tones
    • G09G3/2074—Display of intermediate tones using sub-pixels
    • 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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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)

Abstract

The invention discloses a detection control circuit and a detection control method of a display panel and the display panel, wherein the detection control circuit of the display panel comprises a plurality of data switching modules and a plurality of detection control modules, the data switching modules are used for transmitting a data signal output by a corresponding data output pin of a driving chip to data signal writing nodes of different pixel driving circuits in a display stage in a time-sharing manner, and the detection control modules are used for transmitting detection signals output by different pixel driving circuits to a corresponding detection input pin of the driving chip in the time-sharing manner in the detection stage; wherein the detection input pin multiplexes the data output pin. By the technical scheme, the display uniformity of the display panel is improved, the number of transistors in the pixel driving circuit is reduced, the number of pins of the driving chip is reduced, and the display resolution of the display panel is improved.

Description

Detection control circuit and detection control method of display panel and display panel
Technical Field
The embodiment of the invention relates to the technical field of display, in particular to a detection control circuit and a detection control method of a display panel and the display panel.
Background
The organic light emitting display device generally includes a plurality of pixels, each of the pixels includes a pixel driving circuit and an organic light emitting structure, the pixel driving circuit provides a driving current to the organic light emitting structure, the organic light emitting structure emits light in response to the driving current provided by the pixel driving circuit, and the organic light emitting display device realizes display.
The pixel driving circuit comprises a driving transistor, the driving transistor generates driving current for driving the organic light-emitting structure to emit light, and different currents form different pixel brightness. At present, in the working process of a pixel driving circuit, the problems of voltage deviation and voltage instability of the threshold voltage of a driving transistor exist, the driving current changes, the brightness unevenness of a display panel is caused, and the display effect is influenced.
Disclosure of Invention
The invention provides a detection control circuit and a detection control method of a display panel and the display panel, which are beneficial to improving the display uniformity of the display panel, reducing the number of transistors in a pixel driving circuit, reducing the number of pins of a driving chip and improving the display resolution of the display panel.
In a first aspect, an embodiment of the present invention provides a detection control circuit for a display panel, including:
the data switching modules are used for transmitting a data signal output by a corresponding data output pin of the driving chip to data signal writing nodes of different pixel driving circuits in a time-sharing manner in a display stage;
the detection control modules are used for transmitting detection signals output by different pixel driving circuits to a corresponding detection input pin of the driving chip in a detection stage; wherein at least part of the detection input pins multiplex the data output pins.
Further, the data switching module includes:
the first switch module is used for communicating the data output pin with a corresponding data signal writing node of the pixel driving circuit according to an accessed first selection signal in the display stage;
the second switch module is used for communicating the same data output pin with a data signal writing node of the corresponding pixel driving circuit according to an accessed second selection signal in the display stage; the first switch module and the second switch module are electrically connected with different pixel driving circuits.
Furthermore, a control end of the first switch module is connected to the first selection signal, a first end of the first switch module is electrically connected to the data output pin, and a second end of the first switch module is electrically connected to a data signal write-in node of the corresponding pixel driving circuit;
the control end of the second switch module is connected to the second selection signal, the first end of the second switch module is electrically connected with the same data output pin, and the second end of the second switch module is electrically connected with the corresponding data signal writing node of the pixel driving circuit.
Further, the detection control module comprises:
the third switch module is used for communicating the detection input pin with a detection signal output node of the corresponding pixel driving circuit according to an accessed third selection signal in the detection stage;
the fourth switch module is used for communicating the detection input pin with the corresponding detection signal output node of the pixel driving circuit according to an accessed fourth selection signal in the detection stage; the third switch module and the fourth switch module are electrically connected with different pixel driving circuits.
Furthermore, a control end of the third switch module is connected to the third selection signal, a first end of the third switch module is electrically connected to the detection input pin, and a second end of the third switch module is electrically connected to a detection signal output node of the corresponding pixel driving circuit;
and the control end of the fourth switch module is connected to the fourth selection signal, the first end of the fourth switch module is electrically connected with the same detection input pin, and the second end of the fourth switch module is electrically connected with the corresponding detection signal output node of the pixel driving circuit.
Further, the pixel driving circuit includes:
the driving module is used for providing driving current for the corresponding organic light-emitting element in a light-emitting stage, and the organic light-emitting element emits light in response to the driving current;
the data writing module is used for writing data signals into the control end of the driving module in a data writing stage, and the data writing module is electrically connected with the corresponding data signal line through a set node;
the storage module is used for maintaining the potential of the control end of the driving module;
the detection module is electrically connected with the first end of the driving module, the second end of the driving module is connected with a power signal, and the detection module is used for communicating the first end of the driving module with a detection signal output node of the pixel driving circuit in the detection stage;
the detection control circuit further comprises:
a plurality of reference control modules, each of which is arranged in a matrix of sub-pixels in the display panel, and is arranged corresponding to a row of sub-pixels, wherein the reference control modules are used for writing a set reference signal into the set node of the pixel driving circuit in the detection stage;
preferably, a first end of the reference control module is connected to the set reference signal, and a second end of the reference control signal is electrically connected to the set node of the pixel driving circuit.
In a second aspect, an embodiment of the present invention further provides a detection control method for a display panel, which is executed by the detection control circuit for the display panel of the first aspect, and the detection control method for the display panel includes:
in the display stage, the data switching module is controlled to transmit a data signal output by a corresponding data output pin of the driving chip to different pixel driving circuits in a time-sharing manner;
and in the detection stage, the detection control module is controlled to transmit detection signals output by different pixel driving circuits to a corresponding data output pin of the driving chip in a time-sharing manner.
Further, in the detection phase, controlling the detection control module to transmit the detection signals output by the different pixel driving circuits to a corresponding data output pin of the driving chip in a time-sharing manner includes:
controlling the detection control module to transmit a detection signal output by the pixel driving circuit corresponding to a first sub-pixel in the ith row of sub-pixels to the data output pin of the driving chip, transmit a detection signal output by the pixel driving circuit corresponding to a second sub-pixel in the ith row of sub-pixels to the data output pin of the driving chip, and transmit a detection signal output by the pixel driving circuit corresponding to a third sub-pixel in the ith row of sub-pixels to the data output pin of the driving chip;
controlling the detection control module to transmit a detection signal output by the pixel driving circuit corresponding to a first sub-pixel in the (i + 1) th row of sub-pixels to the data output pin of the driving chip, transmit a detection signal output by the pixel driving circuit corresponding to a second sub-pixel in the (i + 1) th row of sub-pixels to the data output pin of the driving chip, and transmit a detection signal output by the pixel driving circuit corresponding to a third sub-pixel in the (i + 1) th row of sub-pixels to the data output pin of the driving chip; wherein i is a positive integer.
Further, in the detection phase, controlling the detection control module to transmit the detection signals output by the different pixel driving circuits to a corresponding data output pin of the driving chip in a time-sharing manner includes:
controlling the detection control module to transmit detection signals output by the pixel driving circuits corresponding to all the first sub-pixels in the display panel to the data output pins of the driving chip;
controlling the detection control module to transmit detection signals output by the pixel driving circuits corresponding to all the second sub-pixels in the display panel to the data output pins of the driving chip;
and controlling the detection control module to transmit detection signals output by the pixel driving circuits corresponding to all third sub-pixels in the display panel to the data output pins of the driving chip.
In a third aspect, an embodiment of the present invention further provides a display panel, including the detection control circuit of the display panel according to the first aspect, where the display panel includes a display area and a non-display area located on at least one side of the display area, and the detection control circuit is disposed in the non-display area;
preferably, one of the data switching modules is disposed corresponding to two rows of sub-pixels in the display panel, and one of the detection control modules is disposed corresponding to two rows of sub-pixels in the display panel.
The embodiment of the invention provides a detection control circuit and a detection control method of a display panel and the display panel, wherein the detection control circuit of the display panel comprises a plurality of data switching modules and a plurality of detection control modules, the data switching modules are used for transmitting a data signal output by a corresponding data output pin of a driving chip to data signal writing nodes of different pixel driving circuits in a display stage in a time-sharing manner, and the detection control modules are used for transmitting detection signals output by different pixel driving circuits to a corresponding detection input pin of the driving chip in a detection stage in a time-sharing manner.
Drawings
Other features, objects and advantages of the present application will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, made with reference to the accompanying drawings in which:
fig. 1 is a schematic structural diagram of a detection control circuit of a display panel according to an embodiment of the present invention;
fig. 2 is a schematic circuit diagram of a detection control circuit of a display panel according to an embodiment of the present invention;
FIG. 3 is a driving timing diagram of a display phase of the detection control circuit of the structure shown in FIG. 2;
FIG. 4 is a driving timing diagram of a detection phase of the detection control circuit of the structure shown in FIG. 2;
FIG. 5 is a driving timing diagram of a pixel driving circuit corresponding to a detection phase in the detection control circuit of FIG. 2;
fig. 6 is a flowchart illustrating a detection control method for a display panel according to an embodiment of the present invention;
fig. 7 is a flowchart illustrating another detection control method for a display panel according to an embodiment of the present invention;
fig. 8 is a flowchart illustrating another detection control method for a display panel according to an embodiment of the present invention;
FIG. 9 is another driving timing diagram of the detection phase of the detection control circuit of the structure shown in FIG. 2;
fig. 10 is a schematic structural diagram of a display panel according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the 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. Throughout this specification, the same or similar reference numbers refer to the same or similar structures, elements, or processes. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.
As described in the background section above: the organic light emitting display device generally includes a plurality of pixels, each of the pixels includes a pixel driving circuit and an organic light emitting structure, the pixel driving circuit provides a driving current to the organic light emitting structure, the organic light emitting structure emits light in response to the driving current provided by the pixel driving circuit, and the organic light emitting display device realizes display. The pixel driving circuit comprises a driving transistor, the driving transistor generates driving current for driving the organic light-emitting structure to emit light, and different currents form different pixel brightness. At present, in the working process of a pixel driving circuit, the threshold voltage of a driving transistor has the problems of voltage deviation and voltage instability, and the magnitude of the driving current generated by the driving transistor is directly influenced by the magnitude of the threshold voltage of the driving transistor, so that the deviation of the threshold voltage of the driving transistor causes the variation of the driving current, the brightness of a display panel is uneven, and the display effect is influenced.
In addition, the frame of the display panel is provided with a driving chip for providing a corresponding display signal for the display area, the number of pixels is increased along with the improvement of the resolution of the display panel, and the number of pins of the driving chip is also increased continuously, so that the requirement on the number of pins of the driving chip is higher for the display panel with the same resolution, the miniaturization of the driving chip is not facilitated, and the improvement of the resolution of the display panel is not facilitated for the driving chip with the same number of pins.
The detection control circuit for setting the display panel comprises a plurality of data switching modules and a plurality of detection control modules, wherein the data switching modules are used for transmitting a data signal output by a corresponding data output pin of a driving chip to data signal writing nodes of different pixel driving circuits in a display stage, and the detection control modules are used for transmitting detection signals output by different pixel driving circuits to a corresponding detection input pin of the driving chip in the detection stage. In addition, the multiplexing data output pins provide data signals for different pixel driving circuits, and at least part of the detection input pins are arranged to multiplex the data output pins, namely, the driving chip multiplexes the pins for outputting the data signals and the pins for inputting the detection signals, so that the number of the driving chip pins is reduced, and the display resolution of the display panel is improved.
The above is the core idea of the present invention, and the technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the drawings in the embodiment of the present invention. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without any creative work belong to the protection scope of the present invention.
Fig. 1 is a schematic structural diagram of a detection control circuit of a display panel according to an embodiment of the present invention. As shown in fig. 1, the detection control circuit of the display panel includes a plurality of data switching modules 1 and a plurality of detection control modules 2, the data switching modules 1 are configured to transmit a data signal output from a corresponding data output pin a of the driving chip 3 to a data signal writing node a1 of different pixel driving circuits 4 in a display phase, and the detection control modules 2 are configured to transmit a detection signal output from different pixel driving circuits 4 to a corresponding detection input pin B of the driving chip 3 in a detection phase; at least a portion of the detection input pins B are multiplexed with the data output pins a, and all of the data output pins a are exemplarily configured to be multiplexed as the detection input pins B in fig. 1.
Specifically, as shown in fig. 1, the data switching module 1 may transmit the data signals output by the driving chip 3 to different pixel driving circuits 4 in a time-sharing manner in the display stage, and the driving chip 3 outputs corresponding data signals to the plurality of pixel driving circuits 4 in a time-sharing manner through one data output pin a to control the driving current generated by the corresponding pixel driving circuit 4, so as to control the brightness of the corresponding sub-pixel, and fig. 1 exemplarily sets the driving chip 3 to output corresponding data signals to two different pixel driving circuits 4 in a time-sharing manner through one data output pin a, and combines the data output pins a of the driving chip 3, thereby reducing the number of the data output pins a.
The detection control module 2 can transmit corresponding detection signals output by different pixel drive circuits 4 to the same detection input pin B in a time-sharing manner in a detection stage, the drive chip 3 receives the detection signals containing threshold voltage information of the drive transistors in the corresponding pixel drive circuits 4 through the detection input pin B, the drive chip 3 can adjust data signals output to the different pixel drive circuits 4 in a display stage according to the received detection signals, so that compensation of the threshold voltages of the drive transistors in the different pixel drive circuits 4 is realized, the influence of deviation of the threshold voltages of the drive transistors on display uniformity is eliminated, external compensation of the threshold voltages of the drive transistors in the pixel drive circuits 4 is realized, the display uniformity of the display panel is improved, the number of the transistors in the pixel drive circuits 4 is favorably reduced relative to the internal compensation, and further the light transmittance of a display area of the display panel is improved.
In addition, the data output pin A is multiplexed by the detection input pin B, the data signal output from the driving chip 3 to the corresponding pixel driving circuit 4 through the data output pin A is realized by the data output pin A and the detection input pin B in a time-sharing manner, the corresponding pixel driving circuit 4 transmits the detection signal to the detection input pin B corresponding to the driving chip 3, the multiplexing of the pins of the driving chip 3 exists in the output process of the data signal, the multiplexing of the pins of the chip also exists in the input process of the detection signal, the pin number of the driving chip 3 is reduced, and the design of a high PPI product is favorably realized.
Illustratively, in the display phase, the data switching module 1a may time-divisionally transmit the data signal output from the data output pin A1 of the driving chip 3 to the data signal writing node a11 of the pixel driving circuit 4a and the data signal writing node a12 of the pixel driving circuit 4b, and time-divisionally control the light emitting luminance of the sub-pixels in the pixel driving circuit 4a and the pixel driving circuit 4 b. In the detection stage, the detection control module 2a may transmit the detection signal output by the pixel driving circuit 4a to the detection input pin B1 of the driving chip 3 through the detection signal output node B11 and the detection signal output by the pixel driving circuit 4B through the detection signal output node B12 in a time-sharing manner, detect the threshold voltages of the driving transistors in the pixel driving circuit 4a and the pixel driving circuit 4B in a time-sharing manner, and output a threshold voltage compensation signal through the data output pin A1 according to the corresponding detection signal to compensate the threshold voltage of the corresponding driving transistor. Similarly, the pixel driving circuit 4c and the pixel driving circuit 4d can be controlled and detected in a time-sharing manner through the data output pin A2 or the detection input pin B2, the data switching module 1B and the detection control module 2B; the pixel driving circuit 4e and the pixel driving circuit 4f can be controlled and detected in a time-sharing manner through the data output pin A3 or the detection input pin B3, the data switching module 1c and the detection control module 2 c. Through one pin of the driving chip 3, the data switching module 1 and the detection control module 2 are used for displaying, detecting and compensating the two pixel driving circuits 4 in a time-sharing manner, so that the external compensation of the threshold voltage of the driving transistor in the pixel driving circuit 4 is realized, and the number of the pins of the driving chip 3 is effectively reduced.
It should be noted that fig. 1 only shows a situation that one pin of the driving chip 3 and one group of the data switching module 1 and the detection control module 2 detect and control two pixel driving circuits 4, in a specific application, the data switching module 1 may transmit a signal to more different pixel driving circuits 4 in a time-sharing manner, and the detection control module 2 may detect more different pixel driving circuits 4 in a time-sharing manner, which may be set in combination with an actual situation, which is not limited in this embodiment of the present invention.
Fig. 2 is a schematic circuit diagram of a detection control circuit of a display panel according to an embodiment of the present invention. Optionally, with reference to fig. 1 and fig. 2, the data switching module 1 may be configured to include a first switch module 10 and a second switch module 11, where the first switch module 10 is configured to communicate the data output pin a with the data signal writing node a1 of the corresponding pixel driving circuit 4 according to the accessed first selection signal M1 in the display stage, and the second switch module 11 is configured to communicate the same data output pin a with the data signal writing node a1 of the corresponding pixel driving circuit 4 according to the accessed second selection signal M2 in the display stage; the first switch module 10 and the second switch module 11 are electrically connected to different pixel driving circuits 4.
Specifically, with reference to fig. 1 and fig. 2, in a first period of the display phase, the first switch module 10 is controlled to communicate the data output pin a with the corresponding pixel driving circuit 4 by the first selection signal M1, in a second period of the display phase, the second switch module 11 is controlled to communicate the data output pin a with the corresponding different pixel driving circuit 4 by the second selection signal M2, the first period and the second period do not overlap, the first switch module 10 or the second switch module 11 is controlled to write the data signal into the corresponding pixel driving circuit 4 in a time-sharing manner, and the data output pin a outputs different data signals to the corresponding pixel driving circuit 4 in a time-sharing manner to control the light emission luminance of the sub-pixels, so that the number of the data output pins of the driving chip 3 is reduced.
Optionally, with reference to fig. 1 and fig. 2, a control terminal c1 of the first switch module 10 may be configured to access the first selection signal M1, a first terminal c2 of the first switch module 10 is electrically connected to the data output pin a, a second terminal c3 of the first switch module 10 is electrically connected to the data signal writing node a1 of the corresponding pixel driving circuit 4, a control terminal d1 of the second switch module 11 is connected to the second selection signal M2, a first terminal d2 of the second switch module 11 is electrically connected to the same data output pin a, and a second terminal d3 of the second switch module 11 is electrically connected to the data signal writing node a1 of the corresponding pixel driving circuit 4.
Specifically, with reference to fig. 1 and fig. 2, the first switch module 10 may include a first switch transistor T1, a control terminal, a first terminal, and a second terminal of the first switch transistor T1 respectively correspond to the control terminal c1, the first terminal c2, and the second terminal c3 of the first switch module 10, the second switch module 11 includes a second switch transistor T2, and the control terminal, the first terminal, and the second terminal of the second switch transistor T2 respectively correspond to the control terminal d1, the first terminal d2, and the second terminal d3 of the first switch module 10. The first switching transistor T1 is controlled to be conducted by the first selection signal M1 to communicate the data output pin a with the corresponding pixel driving circuit 4, and the second switching transistor T2 is controlled to be conducted by the second selection signal M2 to communicate the data output pin a with the corresponding different pixel driving circuit 4, so that different data signals output by one data output pin a can be written into the corresponding pixel driving circuit 4 in a time-sharing manner to control the light emission brightness of the sub-pixels, and the number of data output pins of the driving chip 3 is reduced.
Optionally, with reference to fig. 1 and fig. 2, the detection control module 2 may include a third switch module 21 and a fourth switch module 22, where the third switch module 21 is configured to connect the detection input pin B and the detection signal output node B1 of the corresponding pixel driving circuit 4 according to the connected third selection signal in the detection stage, and the fourth switch module 22 is configured to connect the detection input pin B and the detection signal output node B1 of the corresponding pixel driving circuit 4 according to the connected fourth selection signal in the detection stage; the third switching module 21 and the fourth switching module 22 are electrically connected to different pixel driving circuits 4.
Specifically, with reference to fig. 1 and fig. 2, in the first period of the detection phase, the third switch module 21 is controlled by the third selection signal to communicate the detection input pin B with the corresponding pixel driving circuit 4, in the second period of the detection phase, the fourth switch module 22 is controlled by the fourth selection signal to communicate the detection input pin B with the corresponding different pixel driving circuit 4, the first period and the second period do not overlap, the third switch module 21 or the fourth switch module 22 in the time-sharing control detection control module 2 outputs the detection signals of the different pixel driving circuits 4 to the same detection input pin B, the same detection input pin B detects the threshold voltages of the driving transistors in the different pixel driving circuits 4, and compensates the threshold voltages of the driving transistors according to the detection result, so that the external compensation of the threshold voltages of the driving transistors in the different pixel driving circuits is realized, the number of the transistors in the pixel driving circuit is reduced, the detection input pin B multiplexes the data output pin a, the display control and the detection control of the display panel are performed in stages, and the number of the data output pins of the driving chip 3 is further reduced.
Alternatively, with reference to fig. 1 and fig. 2, a control terminal e1 of the third switch module 21 may be configured to access the third selection signal, a first terminal e2 of the third switch module 21 is electrically connected to the detection input pin B, a second terminal e3 of the third switch module 21 is electrically connected to the detection signal output node B1 of the corresponding pixel driving circuit 4, a control terminal f1 of the fourth switch module 22 is configured to access the fourth selection signal, a first terminal f2 of the fourth switch module 22 is electrically connected to the same detection input pin B, and a second terminal f3 of the fourth switch module 22 is electrically connected to the detection signal output node B1 of the corresponding pixel driving circuit 4.
Specifically, with reference to fig. 1 and fig. 2, the third switching module 21 may be configured to include a third switching transistor T3, a control terminal, a first terminal, and a second terminal of the third switching transistor T3 respectively correspond to the control terminal e1, the first terminal e2, and the second terminal e3 of the third switching module 21, the fourth switching module 22 includes a fourth switching transistor T4, and a control terminal, a first terminal, and a second terminal of the fourth switching transistor T4 respectively correspond to the control terminal f1, the first terminal f2, and the second terminal f3 of the fourth switching module 22. The third switching transistor T3 is controlled to be conducted through the third selection signal to communicate the detection input pin B with the corresponding pixel driving circuit 4, and the fourth switching transistor T4 is controlled to be conducted through the fourth selection signal to communicate the detection input pin B with the corresponding different pixel driving circuits 4, so that detection signals of different pixel driving circuits 4 can be transmitted to the driving chip 3 through one detection input pin B at different times, and the detection input pin B multiplexes the data output pin a, and the number of data output pins of the driving chip 3 is further reduced.
Illustratively, referring to fig. 1 and 2, taking the display panel including three sub-pixels of red, green and blue, three switch control signal lines SW _ R, SW _ G and SW _ B are correspondingly provided, for example, the pixel driving circuits 4a to 4c are respectively provided to correspondingly drive a set of sub-pixels of red, green and blue: the pixel driving circuits 4d to 4f drive the sub-pixels of the other group of red, green and blue colors, respectively. The working principle of the detection control circuit of the display panel provided in this embodiment is specifically described as follows:
in a first period of the display phase, a first selection signal M1 controls a first switching transistor T1 in a data switching module 1a-1c to be turned on so that data output pins A1-A3 of a driving chip 3 can write data signals into a node a11 of a pixel driving circuit 4a, and a data signal writing node a13 of the pixel driving circuit 4c and a data signal writing node a15 of a pixel driving circuit 4e transmit data signals to control the light emitting brightness of corresponding sub-pixels; in the second period of the display phase, the second selection signal M2 controls the second switching transistor T2 in the data switching module 1a-1c to be turned on, so that the data output pins A1-A3 of the driving chip 3 can transmit data signals to the data signal writing node a12 of the pixel driving circuit 4b, the data signal writing node a14 of the pixel driving circuit 4d and the data signal writing node a16 of the pixel driving circuit 4f, and the light emitting brightness of the corresponding sub-pixel is controlled.
In the detection phase, a switch control signal line SW _ R is set to be turned on to control a third switching transistor T3 in the detection control module 2a and a fourth switching transistor T4 in the detection control module 2B to transmit detection signals corresponding to red subpixels output by the detection signal output nodes B11 and B14 to the driving chip 3, a switch control signal line SW _ G outputs a signal to control a fourth switching transistor T4 in the detection control module 2a and a third switching transistor T3 in the detection control module 2c to be turned on to transmit detection signals corresponding to green subpixels output by the detection signal output nodes B12 and B15 to the driving chip 3, a switch control signal line SW _ u _ B outputs a signal to control a third switching transistor T3 in the detection control module 2B and a fourth switching transistor T4 in the detection control module 2c to transmit detection signals corresponding to blue subpixels output by the detection signal output nodes B13 and B16 to the driving chip 3, and controls a switch control signal line SW _ R, a fourth switching transistor T4 in the detection control module 2c to be turned on to transmit detection signals corresponding to the blue subpixels output by the detection signal output nodes B13 and B16 to the driving chip 3, and a row of pixels, and a row of the display panel can be sequentially compensated by time-sharing display panel, and a row of red subpixels can be displayed by a row of the pixel display panel.
Alternatively, referring to fig. 2, the pixel driving circuit 4 may include a driving module 31, a Data writing module 32, a storage module 33, and a detecting module 34, where the Data writing module 32 is electrically connected to a corresponding Data signal Line Data Line through a set node h, the detecting module 34 is electrically connected to a first terminal s of the driving module 31, a second terminal d of the driving module 31 is connected to a power signal ELVDD, the driving module 31 is configured to provide a driving current to a corresponding organic light emitting element 35 in a light emitting phase, the organic light emitting element 35 emits light in response to the driving current, the Data writing module 32 is configured to write a Data signal to a control terminal g of the driving module 31 in the Data writing phase, the storage module 33 is configured to maintain a potential of the control terminal g of the driving module 31, and the detecting module 34 is configured to communicate the first terminal s of the driving module 31 with a detecting signal output node b1 of the pixel driving circuit 4 in the detecting phase.
The setting detection control circuit comprises a plurality of reference control modules 5, the sub-pixel matrixes in the display panel are arranged, each reference control module 5 is arranged corresponding to one row of sub-pixels, and the reference control modules 5 are used for writing a setting reference signal Vrefn into a setting node h of the pixel driving circuit 4 in a detection stage. Preferably, a first end g2 of the reference control module 5 is connected to the setting reference signal Vrefn, and a second end g3 of the reference control signal is electrically connected to the setting node h of the pixel driving circuit 4.
Specifically, referring to fig. 2, the driving module 31 includes a driving transistor T5, the Data writing module 32 includes a Data writing transistor T6, the storage module 33 includes a storage capacitor Cst, the detecting module 34 includes a detecting transistor T7, the SCAN signal SCAN1 can control the Data writing transistor T6 in the pixel driving circuit 4 to be turned on during the display phase, the Data signal output from the setting node h in the Data signal Line is transmitted to the control terminal g of the driving transistor T5 to control the driving transistor T5 to be turned on, so that the organic light emitting element 35 emits light after being connected to the power signal ELVDD, and the storage capacitor Cst stores a voltage signal between the control terminal g and the first terminal s of the driving transistor T5, i.e., a threshold voltage between the gate and the source.
Fig. 2 only shows the pixel driving circuits 4 of a row of sub-pixels in the display panel, the sub-pixels in the display panel are arranged in a matrix, the Data writing transistors T6 in each row of sub-pixels are electrically connected to the corresponding Data signal lines Data Line through the setting nodes, each reference control module 5 is arranged corresponding to a row of sub-pixels, so that the setting reference signal Vrefn can be written into the setting nodes corresponding to the plurality of pixel driving circuits 4 in the sub-pixel matrix in the detection phase, the setting reference signal Vrefn is transmitted to the gate of the driving transistor T5 through the Data writing transistor T6, the threshold voltage between the gate and the source of the driving transistor T5 is controlled to turn off the driving transistor T5 and detect the potential of the source of the driving transistor T5, and the source following detection mode is realized.
The reference control module 5 includes a reference transistor T8, the control terminal g1, the first terminal g2, and the second terminal g3 of the reference control module 5 correspond to the control terminal, the first terminal, and the second terminal of the reference transistor T8, respectively, preferably, the first terminal g2 of the reference transistor T8 is connected to a set reference signal Vrefn, and the second terminal g3 is electrically connected to the set node h of the pixel driving circuit 4, such that the first switching transistor T1 and the reference transistor T8 are both electrically connected to the set node h of the pixel driving circuit 4, and the first selection signal M1 and the scan signal SW1 can be set to control the first switching transistor T1 or the reference transistor T8 to be turned on in a time-sharing manner to transmit a signal to the set node h of the pixel driving circuit 4 through a Data signal Line Data Line, such that the set reference signal Vrefn can be input to the pixel driving circuit 4 by multiplexing the Data signal Line Data Line, which reduces the arrangement of signal transmission lines in the display panel and simplifies the detection control circuit.
FIG. 3 is a driving timing diagram of a display phase of the detection control circuit of the structure shown in FIG. 2. Illustratively, in the display stage, the SCAN signals SCAN2 and SW1, the switch control signal lines SW _ R, SW _ G, and SW _ B may be set to be kept at a low level, the sensing transistor T7, the third switching transistor T3, the fourth switching transistor T4, and the reference transistor T8 may be set to be in an off state, the data writing transistor T6 is controlled to be turned on by the SCAN signal SCAN1, and in a first period s1, the first selection signal M1 outputs a high level to control the first switching transistor T1 to be turned on, so that the data output pin a writes a data signal IC output into the pixel driving circuit 4 to control the brightness of the corresponding sub-pixel; in the second period s2, the second selection signal M1 outputs a high level to control the second switching transistor T2 to be turned on, so that the data output pin a writes the data signal IC output to the pixel driving circuit 4 to control the brightness of the corresponding sub-pixel.
Fig. 4 is a driving timing diagram of a detection phase of the detection control circuit of the structure shown in fig. 2. For example, in the sensing phase, the first selection signal M1 and the second selection signal M2 may be set to be kept at a low level, the first switching transistor T1 and the second switching transistor T2 are in an off state, the SCAN signal SW1 is kept at a high level state, the reference transistor T8 is controlled to be kept at an on state, the reference signal Vrefn is set to be written into the Data signal Line Data, the SCAN signals SCAN1 and SCAN2 are changed to be at a high level at the beginning of sensing, and the Data writing transistor T6 and the sensing transistor T7 are kept at an on state. In the first detection period T1, the detection signal output nodes b11 and b14 output the detection signals corresponding to the red sub-pixels to the driving chip 3, in the second detection period T2, the detection signal output nodes b12 and b15 output the detection signals corresponding to the green sub-pixels to the driving chip 3, and in the third detection period T3, the detection signal output nodes b13 and b16 output the detection signals corresponding to the blue sub-pixels to the driving chip 3, so that the source potential signals of the driving transistors T5 in the sub-pixels of the same row with different colors can be detected in a time-sharing manner, the source potential signals of the driving transistors T5 in each row of sub-pixels are detected accordingly, and the detection of the threshold voltages of the driving transistors T5 corresponding to the sub-pixels in the whole display panel can be completed by performing one-time screen scanning in a row-by-row detection manner.
Fig. 5 is a driving timing diagram of a pixel driving circuit corresponding to a detection phase in the detection control circuit of fig. 2. For example, when detecting a certain sub-pixel, the detection can be divided into a preset voltage phase t4, a charging phase t5 and a sampling phase t6, taking the detection pixel driving circuit 4a as an example:
when the preset voltage enable signal SPRE is at a high level in the preset voltage phase T4, the driving chip 3 writes the source potential control signal IC pin to the source s of the driving transistor T5 in the pixel driving circuit 4a through the detection input pin B1, the third switching transistor T3, and the detection transistor T7, and the source potential control signal IC pin corresponds to Vref in the preset voltage phase T4, so that the voltage value at which the lighting voltage of the organic light emitting element 35 is lower than Vref can be set, and the organic light emitting element 35 does not emit light in the preset voltage phase T4.
In the charging phase T5, the level of the preset voltage enable signal SPRE is set to be low, the set reference signal Vrefn is written into the gate g of the driving transistor T5 through the data writing transistor T6 in the pixel driving circuit 4a, the driving transistor T5 is turned on, the first power signal ELVDD charges the source s of the driving transistor T5, the driving chip 3 controls the potential of the source potential control signal IC pin output from the detection input pin B1 to gradually increase to Vsen, the potential of the source s of the driving transistor T5 increases from Vref to Vsen, at this time, the driving transistor T5 reaches an off-critical state, and the threshold voltage Vth = Vrefn-Vsen of the driving transistor T5.
In the sampling phase T6, when the sampling enable signal SAMP has a falling edge, the driving chip 3 does not control the potential output by the pin, the detection input pin B1 collects the detection signal corresponding to the red sub-pixel output by the detection signal output node B11, that is, the source s potential signal of the driving transistor T5, that is, the driving chip 3 can detect the voltage value of Vsen, the driving chip 3 can obtain the threshold voltage Vth of the driving transistor T5 in the corresponding pixel driving circuit 4 according to the pre-stored voltage value of Vrefn, and then when the data signal is output to the corresponding pixel driving circuit 4 in the display phase, the threshold voltage Vth is compensated to the data signal, so as to eliminate the influence of the drift of the threshold voltage on the display uniformity.
The embodiment of the invention also provides a detection control method of the display panel, which is executed by the detection control circuit of the display panel provided by any embodiment of the invention. Fig. 6 is a flowchart illustrating a detection control method of a display panel according to an embodiment of the present invention. As shown in fig. 1 and fig. 6, the detection control method of the display panel includes:
and S710, in the display stage, controlling the data switching module to transmit the data signal output by one corresponding data output pin of the driving chip to different pixel driving circuits in a time-sharing manner.
Specifically, as shown in fig. 1, the data switching module 1 may transmit the data signals output by the driving chip 3 to different pixel driving circuits 4 in a time-sharing manner in the display stage, and the driving chip 3 outputs corresponding data signals to the plurality of pixel driving circuits 4 in a time-sharing manner through one data output pin a to control the driving current generated by the corresponding pixel driving circuit 4, so as to control the brightness of the corresponding sub-pixel, and fig. 1 exemplarily sets the driving chip 3 to output corresponding data signals to two different pixel driving circuits 4 in a time-sharing manner through one data output pin a, and combines the data output pins a of the driving chip 3, thereby reducing the number of the data output pins a.
S720, in the detection stage, the detection control module is controlled to transmit the detection signals output by the different pixel driving circuits to a corresponding data output pin of the driving chip in a time-sharing manner.
Referring to fig. 1, the detection control module 2 may transmit corresponding detection signals output by different pixel driving circuits 4 to the same detection input pin B in a time-sharing manner in a detection stage, the driving chip 3 receives the detection signals including threshold voltage information of driving transistors in the corresponding pixel driving circuits 4 through the detection input pin B, and the driving chip 3 may adjust data signals output to the different pixel driving circuits 4 in a display stage according to the received detection signals, so as to compensate threshold voltages of the driving transistors in the different pixel driving circuits 4, eliminate an influence of a deviation of the threshold voltages of the driving transistors on display uniformity, realize external compensation of the threshold voltages of the driving transistors in the pixel driving circuits 4, improve display uniformity of the display panel, and facilitate reduction of the number of transistors in the pixel driving circuits 4 with respect to the internal compensation, thereby improving light transmittance of a display area of the display panel.
Fig. 7 is a flowchart illustrating another detection control method for a display panel according to an embodiment of the present invention. In this embodiment, the detection control method is further optimized based on the above embodiments. Accordingly, as shown in fig. 7, the detection control method of the display panel specifically includes:
and S810, in the display stage, controlling the data switching module to transmit the data signal output by one corresponding data output pin of the driving chip to different pixel driving circuits in a time-sharing manner.
S820, the detection control module is controlled to transmit a detection signal output by a pixel driving circuit corresponding to a first sub-pixel in the ith row of sub-pixels to a data output pin of the driving chip, transmit a detection signal output by a pixel driving circuit corresponding to a second sub-pixel in the ith row of sub-pixels to the data output pin of the driving chip, and transmit a detection signal output by a pixel driving circuit corresponding to a third sub-pixel in the ith row of sub-pixels to the data output pin of the driving chip.
Specifically, with reference to fig. 1-2 and 4, the pixel driving circuits 4a-4c respectively drive one set of red, green and blue sub-pixels, the pixel driving circuits 4d-4f respectively drive another set of red, green and blue sub-pixels, the sub-pixels corresponding to the pixel driving circuits 4a-4c are, for example, the first sub-pixel, the second sub-pixel and the third sub-pixel in the ith row of sub-pixels, the detection signal output nodes b11 and b14 output the detection signal corresponding to the red sub-pixel to the driving chip 3 in the first detection period T1, the detection signal output nodes b12 and b15 output the detection signal corresponding to the green sub-pixel to the driving chip 3 in the second detection period T2, the detection signal output nodes b13 and b16 output the detection signal corresponding to the blue sub-pixel to the driving chip 3 in the third detection period T3, so as to sequentially detect the source voltage of the first sub-pixel, the second sub-pixel and the third sub-pixel in the ith row of sub-pixels, and detect the source voltage of the driving transistors in the same row of the same sub-pixels.
S830, controlling the detection control module to transmit a detection signal output by a pixel driving circuit corresponding to a first sub-pixel in the (i + 1) th row of sub-pixels to a data output pin of a driving chip, transmit a detection signal output by a pixel driving circuit corresponding to a second sub-pixel in the (i + 1) th row of sub-pixels to the data output pin of the driving chip, and transmit a detection signal output by a pixel driving circuit corresponding to a third sub-pixel in the (i + 1) th row of sub-pixels to the data output pin of the driving chip; wherein i is a positive integer.
Exemplarily, after the ith row of sub-pixels are detected according to the color sequence of the sub-pixels, the (i + 1) th row of sub-pixels can be continuously detected according to the same detection principle, and so on, so that the row-by-row detection of the full-screen sub-pixel matrix in the display panel can be completed, the potential of the source S of the driving transistor T5 in each color sub-pixel is detected row by row, the data output pin A is multiplexed as the detection input pin B, the pin number of the driving chip 3 is reduced, the threshold voltage of the driving transistor is favorably stabilized, the driving current of the driving transistor is prevented from changing, the light-emitting brightness of the display panel is more uniform, the display effect is optimized, and the high PPI product design is favorably realized.
Fig. 8 is a flowchart illustrating another detection control method for a display panel according to an embodiment of the present invention. In this embodiment, the detection control method is further optimized based on the above embodiments. Accordingly, as shown in fig. 8, the detection control method of the display panel specifically includes:
s910, in the display stage, the data switching module is controlled to transmit the data signal output by a corresponding data output pin of the driving chip to different pixel driving circuits in a time-sharing manner.
S920, controlling the detection control module to transmit the detection signals output by the pixel driving circuits 4 corresponding to all the first sub-pixels in the display panel to the data output pins of the driving chip.
Fig. 9 is another driving timing diagram of the detection phase of the detection control circuit of the structure shown in fig. 2. Taking the pixel driving circuit 4 in the display panel to drive the red, green and blue sub-pixels respectively, the first sub-pixel is a red sub-pixel, the second sub-pixel is a green sub-pixel, and the third sub-pixel is a blue sub-pixel as an example, specifically, in the first detection period Q1, when the high level of the switch control signal line SW _ _rarrives, the detection transistor T7 in the pixel driving circuit 4 corresponding to all the red sub-pixels in the display panel can be controlled to detect the potential of the source stage S of the driving transistor T5, so that all the first sub-pixels in the display panel can be detected, and the detection and compensation of the threshold voltage of the driving transistor T5 of all the red sub-pixels in the display panel can be completed simultaneously.
S930, controlling the detection control module to transmit the detection signals output by the pixel driving circuits corresponding to all the second sub-pixels in the display panel to the data output pins of the driving chip.
Similarly, in the second detection period Q2, when the high level of the switch control signal line SW _ G arrives, the detection transistors T7 in the pixel driving circuits 4 corresponding to all the green sub-pixels in the display panel can be controlled to detect the source voltage of the driving transistor T5, so that all the second sub-pixels in the display panel can be detected, and the detection and compensation of the threshold voltage of the driving transistors T5 of all the green sub-pixels in the display panel can be simultaneously completed.
And S940, the detection control module is controlled to transmit the detection signals output by the pixel driving circuits corresponding to all the third sub-pixels in the display panel to the data output pins of the driving chip.
Similarly, in the third detection period Q3, when the high level of the switch control signal line SW _ B arrives, the detection transistors T7 in the pixel driving circuits 4 corresponding to all the blue sub-pixels in the display panel can be controlled to detect the source voltage of the driving transistor T5, so that all the third sub-pixels in the display panel can be detected, and the detection and compensation of the threshold voltage of the driving transistors T5 of all the blue sub-pixels in the display panel can be simultaneously completed.
The double-slanted lines in the driving timing diagram shown in fig. 9 represent the signals where the signals repeat the previous signals, and according to the detection control method of the display panel implemented by the driving timing diagram shown in fig. 9, the threshold voltages of the driving transistors T5 of all red sub-pixels in the display panel are detected row by row, then the threshold voltages of the driving transistors T5 of all green sub-pixels are detected row by row, and finally the threshold voltages of the driving transistors T5 of all blue sub-pixels are detected row by row, and the detection of the threshold voltages of the driving transistors T5 corresponding to each sub-pixel in the entire display panel is completed by three times of screen scanning in a time-sharing manner.
The embodiment of the invention further provides a display panel, and fig. 10 is a schematic structural diagram of the display panel provided in the embodiment of the invention. As shown in fig. 10, the display panel includes the detection control circuit of the display panel provided in any embodiment of the present invention, so that the display panel provided in the embodiment of the present invention also has the beneficial effects described in the above embodiments, and further description thereof is omitted here. The display panel comprises a display area 7 and a non-display area 8 positioned on at least one side of the display area 7, and the detection control circuit is arranged in the non-display area 8.
Preferably, one data switching module 1 is disposed corresponding to two rows of sub-pixels in the display panel, and one detection control module 2 is disposed corresponding to two rows of sub-pixels in the display panel. Illustratively, each organic light emitting device driven by the pixel driving circuit 4 corresponds to one sub-pixel, one data switching module 1 is disposed corresponding to two rows of pixel driving circuits 4 in the display panel, and the detection control module 2 multiplexing the data output pin a corresponding to the data switching module 1 is disposed corresponding to the same two rows of pixel driving circuits 4 in the display panel. The display panel can be an organic light-emitting display panel, the display panel can be applied to a display device, and the display device can be a mobile phone, a computer, a tablet computer, a television, a vehicle-mounted display screen, an industrial control display screen and the like. The embodiment of the present invention does not limit the specific form and type of the display panel.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. Those skilled in the art will appreciate that the present invention is not limited to the particular embodiments described herein, and that various obvious changes, rearrangements and substitutions will now be 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 (8)

1. A detection control circuit of a display panel is characterized by comprising:
the data switching modules are used for transmitting a data signal output by a corresponding data output pin of the driving chip to data signal writing nodes of different pixel driving circuits in a time-sharing manner in a display stage;
the detection control modules are used for transmitting detection signals output by different pixel driving circuits to a corresponding detection input pin of the driving chip in a detection stage; wherein at least part of the detection input pins multiplex the data output pins; the detecting stage transmits detecting signals output by different pixel driving circuits to a corresponding detecting input pin of the driving chip in a time-sharing manner, wherein at least part of the detecting input pins multiplex the data output pins, and the detecting stage comprises the following steps:
controlling the detection control module to simultaneously transmit detection signals output by the pixel driving circuits corresponding to a plurality of first sub-pixels in an ith row of sub-pixels to the data output pins of the driving chip, simultaneously transmit detection signals output by the pixel driving circuits corresponding to a plurality of second sub-pixels in the ith row of sub-pixels to the data output pins of the driving chip, and simultaneously transmit detection signals output by the pixel driving circuits corresponding to a plurality of third sub-pixels in the ith row of sub-pixels to the data output pins of the driving chip;
controlling the detection control module to simultaneously transmit detection signals output by the pixel driving circuits corresponding to a plurality of first sub-pixels in the (i + 1) th row of sub-pixels to the data output pins of the driving chip, simultaneously transmit detection signals output by the pixel driving circuits corresponding to a plurality of second sub-pixels in the (i + 1) th row of sub-pixels to the data output pins of the driving chip, and simultaneously transmit detection signals output by the pixel driving circuits corresponding to a plurality of third sub-pixels in the (i + 1) th row of sub-pixels to the data output pins of the driving chip; wherein i is a positive integer;
or, the detecting stage transmits the detecting signal output by the different pixel driving circuits to a corresponding detecting input pin of the driving chip in a time-sharing manner, wherein at least part of the detecting input pins multiplex the data output pins, and the detecting stage includes:
the control detection control module transmits detection signals output by the pixel driving circuits corresponding to all the first sub-pixels in the display panel to the data output pins of the driving chip;
the detection control module is controlled to transmit detection signals output by the pixel driving circuits corresponding to all the second sub-pixels in the display panel to the data output pins of the driving chip;
the detection control module is controlled to transmit detection signals output by the pixel driving circuits corresponding to all the third sub-pixels in the display panel to the data output pins of the driving chip;
the first sub-pixel, the second sub-pixel and the third sub-pixel are different in color.
2. The detection control circuit of claim 1, wherein the data switching module comprises:
the first switch module is used for communicating the data output pins with the corresponding data signal writing nodes of the pixel driving circuit according to an accessed first selection signal in the display stage;
the second switch module is used for communicating the same data output pin with a data signal writing node of the corresponding pixel driving circuit according to an accessed second selection signal in the display stage; the first switch module and the second switch module are electrically connected with different pixel driving circuits.
3. The detection control circuit of claim 2, wherein a control terminal of the first switch module is connected to the first selection signal, a first terminal of the first switch module is electrically connected to the data output pin, and a second terminal of the first switch module is electrically connected to a data signal write node of the corresponding pixel driving circuit;
the control end of the second switch module is connected to the second selection signal, the first end of the second switch module is electrically connected with the same data output pin, and the second end of the second switch module is electrically connected with the corresponding data signal writing node of the pixel driving circuit.
4. The detection control circuit of claim 1, wherein the detection control module comprises:
the third switch module is used for communicating the detection input pin with a detection signal output node of the corresponding pixel driving circuit according to an accessed third selection signal in the detection stage;
the fourth switch module is used for communicating the detection input pin with the corresponding detection signal output node of the pixel driving circuit according to an accessed fourth selection signal in the detection stage; the third switch module and the fourth switch module are electrically connected with different pixel driving circuits.
5. The detection control circuit of claim 4, wherein a control terminal of the third switch module is connected to the third selection signal, a first terminal of the third switch module is electrically connected to the detection input pin, and a second terminal of the third switch module is electrically connected to a detection signal output node of the corresponding pixel driving circuit;
the control end of the fourth switch module is connected to the fourth selection signal, the first end of the fourth switch module is electrically connected to the same detection input pin, and the second end of the fourth switch module is electrically connected to the corresponding detection signal output node of the pixel driving circuit.
6. The detection control circuit of claim 1, wherein the pixel driving circuit comprises:
the driving module is used for providing driving current for the corresponding organic light-emitting element in a light-emitting stage, and the organic light-emitting element emits light in response to the driving current;
the data writing module is used for writing data signals into the control end of the driving module in a data writing stage, and the data writing module is electrically connected with the corresponding data signal line through a set node;
the storage module is used for maintaining the potential of the control end of the driving module; the storage module is connected between the control end of the driving module and the first end of the driving module;
the detection module is electrically connected with the first end of the driving module, the second end of the driving module is connected with a power signal, the detection module is used for communicating the first end of the driving module with a detection signal output node of the pixel driving circuit in the detection stage, and the detection signal comprises corresponding threshold voltage information of a driving transistor in the pixel driving circuit;
in the detection stage, the driving chip writes a source electrode potential control signal into the source electrode of the driving transistor through the multiplexed detection input pin;
the detection control circuit further comprises:
a plurality of reference control modules, each of which is arranged in a matrix of sub-pixels in the display panel, and is arranged corresponding to a row of sub-pixels, wherein the reference control modules are used for writing a set reference signal into the set node of the pixel driving circuit in the detection stage;
the first end of the reference control module is connected to the set reference signal, and the second end of the reference control module is electrically connected with the set node of the pixel driving circuit.
7. A detection control method for a display panel, wherein the detection control method is executed by the detection control circuit for a display panel according to any one of claims 1 to 6, and the detection control method for a display panel comprises:
in the display stage, the data switching module is controlled to transmit a data signal output by a corresponding data output pin of the driving chip to different pixel driving circuits in a time-sharing manner;
and in the detection stage, the detection control module is controlled to transmit detection signals output by different pixel driving circuits to a corresponding data output pin of the driving chip in a time-sharing manner.
8. A display panel comprising the detection control circuit of the display panel according to any one of claims 1 to 6, wherein the display panel comprises a display area and a non-display area located on at least one side of the display area, and the detection control circuit is disposed in the non-display area;
one data switching module is arranged corresponding to two rows of sub-pixels in the display panel, and one detection control module is arranged corresponding to two rows of sub-pixels in the display panel.
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