CN113160744B - Display panel, driving method thereof and display device - Google Patents
Display panel, driving method thereof and display device Download PDFInfo
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- CN113160744B CN113160744B CN202110289101.5A CN202110289101A CN113160744B CN 113160744 B CN113160744 B CN 113160744B CN 202110289101 A CN202110289101 A CN 202110289101A CN 113160744 B CN113160744 B CN 113160744B
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
- G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/006—Electronic inspection or testing of displays and display drivers, e.g. of LED or LCD displays
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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
- G09G2320/048—Preventing or counteracting the effects of ageing using evaluation of the usage time
Abstract
The embodiment of the invention discloses a display panel, a driving method thereof and a display device.A detection circuit and a control circuit are arranged in a non-display area of the display panel, so that the detection circuit can be controlled to be switched on and the control circuit can be controlled to be switched off in an electrical detection stage, and full-screen display is realized; in the aging stage, for a large-size display screen, the OLED devices corresponding to different groups of data lines are aged respectively, the display and aging currents of the OLED devices corresponding to each group of data lines can be reduced to the original 1/n, n is the number of the data lines, and therefore the aging process of a large-size OLED product corresponding to a conventional aging power supply can be adopted, and the problem that the aging process of the large-size OLED product cannot be carried out by the conventional aging power supply is solved.
Description
Technical Field
The present invention relates to the field of display panel technologies, and in particular, to a display panel, a driving method thereof, and a display device.
Background
An Organic Light-Emitting Diode (OLED) display panel is widely used in the display technology field because of its advantages of active Light emission, high contrast, no viewing angle limitation, and fast response speed.
At present, due to the life decay characteristic of the luminescent material in the organic light emitting device, in order to make the characteristics of the organic light emitting display panel more stable when in use, the display panel is subjected to Aging (L-Aging) treatment before leaving the factory so as to filter the stage with the fast life decay rate in the initial service stage, so that the organic light emitting display panel works in the stage with the stable decay rate.
The size of the OLED product is mainly distributed in the range of 2-17 inches, as shown in the following table 1, the table 1 shows that the single-color lighting current range of the conventional OLED product is from 2-17 inches, and is from 30mA grade to >1000mA grade; the aging process needs an aging Power supply (Power) to input voltage to a VDD Power line and a VSS Power line, and the conventional aging Power supply can be more than or equal to 2000mA corresponding to aging current. The L-Aging current is generally n times of the lighting current, and n is more than 2. In order to ensure the uniformity of the output aging voltage, the aging power supply is unique. If the aging power supply simultaneously performs the aging process on the whole 2-inch to 17-inch product, the output current needs to be in the range of 200mA to 10000mA, the output interval of the equipment is very large, and the problem of low output precision when the small-size product is aged is easily caused. Therefore, the output current of the conventional aging power supply is generally in the 2000mA level at present, and the aging power supply cannot correspond to the aging process of a 17-inch large-size OLED product.
TABLE 1 Monochromatic Lighting Current of conventional OLED products
| 2 inch | 6 |
12 inch | 17 inch | |
| Single color lighting current | 30mA grade | 250mA grade | 700mA stage | >1000mA |
| Aging current | About 200mA grade | About 800mA order | About 2000mA grade | 3000mA grade-10000 mA grade |
Disclosure of Invention
The embodiment of the invention provides a display panel, a driving method thereof and a display device, which are used for solving the problem that the aging current of a large-size OLED is too large, and the conventional aging power supply cannot perform an aging process.
The display panel provided by the embodiment of the invention comprises a display area and a non-display area, wherein the display area comprises a plurality of data lines, and the data lines are at least divided into two groups of data lines along the arrangement direction of the data lines; the non-display area comprises a detection circuit, a control circuit, a first control line, a second control line, a first test line and a second test line;
the detection circuit comprises a plurality of detection units, the output end of each detection unit is electrically connected with different data lines, the input end of each detection unit is electrically connected with the corresponding first test line, and the control end of each detection unit is electrically connected with the corresponding first control line;
the control circuit comprises a plurality of control units, the output end of each control unit is electrically connected with different data lines, the input end of each control unit is electrically connected with the corresponding second test line, and the control end of each control unit is electrically connected with the corresponding second control line; wherein, the first and the second end of the pipe are connected with each other,
in the electrical detection phase: each detection unit is configured to be turned on under control of a corresponding first control line, and a first test signal is input to a corresponding data line through a corresponding first test line; each control unit is configured to close under control of a corresponding second control line;
in the aging stage: the detection units corresponding to one group of data lines are configured to be turned on under the control of the corresponding first control lines, first test signals are input to the corresponding data lines through the corresponding first test lines, and the detection units corresponding to the rest groups of data lines are configured to be turned off under the control of the corresponding first control lines; each control unit corresponding to the turned-on detection unit is configured to be turned off under control corresponding to the second control line, each control unit corresponding to the turned-off detection unit is configured to be turned on under control corresponding to the second control line, and a second test signal is input to a corresponding data line through the corresponding second test line.
Optionally, in the display panel provided in the embodiment of the present invention, the control unit includes a first switch transistor, a gate of the first switch transistor is electrically connected to the corresponding second control line, a first pole of the first switch transistor is electrically connected to the corresponding second test line, and a second pole of the first switch transistor is electrically connected to the corresponding data line.
Optionally, in the display panel provided in the embodiment of the present invention, a first pole of each first switch transistor is electrically connected to the same second test line, a gate of the first switch transistor corresponding to the same group of data lines is electrically connected to the same second control line, and a gate of the first switch transistor corresponding to different groups of data lines is electrically connected to different second control lines.
Optionally, in the display panel provided in the embodiment of the present invention, the first switch transistor is a P-type transistor.
Optionally, in the display panel provided in the embodiment of the present invention, the detection unit includes a second switch transistor, a gate of the second switch transistor is electrically connected to the corresponding first control line, a first pole of the second switch transistor is electrically connected to the corresponding first test line, and a second pole of the second switch transistor is electrically connected to the corresponding data line.
Optionally, in the display panel provided in the embodiment of the present invention, the display area further includes a plurality of rows and a plurality of columns of sub-pixels with different colors, the sub-pixels in the same column are electrically connected to the same data line, and the sub-pixel columns electrically connected to the same data line have the same color;
in the same group of data lines, the grid electrodes of the second switching transistors corresponding to the data lines electrically connected with the sub-pixel columns of the same color are electrically connected with the same first control line, and the grid electrodes of the second switching transistors corresponding to the data lines electrically connected with the sub-pixel columns of different colors are electrically connected with different first control lines;
in the different groups of the data lines, the gates of the second switching transistors corresponding to the data lines electrically connected with the sub-pixel columns of the same color are electrically connected with the different first control lines.
Optionally, in the display panel provided in the embodiment of the present invention, the second switch transistor is a P-type transistor.
Optionally, in the display panel provided in the embodiment of the present invention, the detection circuit and the control circuit are located on the same side of the display area, and the detection circuit is located between the display area and the control circuit.
Correspondingly, the embodiment of the invention also provides a display device which comprises the display panel.
Accordingly, an embodiment of the present invention further provides a driving method of the display panel, including:
in the electrical detection phase: each detection unit is conducted under the control of the corresponding first control line, and a first test signal is input to the corresponding data line through the corresponding first test line; each control unit is closed under the control of the corresponding second control line;
in the aging stage: the detection units corresponding to one group of data lines are conducted under the control of the corresponding first control lines, first test signals are input to the corresponding data lines through the corresponding first test lines, and the detection units corresponding to the other groups of data lines are closed under the control of the corresponding first control lines; and each control unit corresponding to the turned-on detection unit is turned off under the control of the corresponding second control line, each control circuit corresponding to the turned-off detection unit is turned on under the control of the corresponding second control line, and a second test signal is input to the corresponding data line through the corresponding second test line.
The invention has the following beneficial effects:
according to the display panel, the driving method thereof and the display device provided by the embodiment of the invention, the detection circuit and the control circuit are arranged in the non-display area of the display panel, so that the detection circuit can be controlled to be switched on and the control circuit can be controlled to be switched off in the electrical detection stage, and full-screen display is realized; in the aging stage, for a large-size display screen, the OLED devices corresponding to different groups of data lines are respectively aged, the display and aging currents of the OLED devices corresponding to each group of data lines can be reduced to 1/n, n is the number of the data lines, so that the aging process of the large-size OLED products corresponding to the conventional aging power supply can be adopted, and the problem that the aging process of the large-size OLED products cannot be carried out by the conventional aging power supply is solved.
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 diagram of a specific structure of the display panel shown in FIG. 1;
FIG. 3 is a diagram illustrating a full screen display effect of the electrical testing stage;
FIG. 4 is a schematic diagram of a half-screen display effect in an aging stage;
fig. 5 is a schematic flowchart of a driving method of a display panel according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a display device according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the drawings of the embodiments of the present invention. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. And the embodiments and features of the embodiments may be combined with each other without conflict. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the invention without any inventive step, are within the scope of protection of the invention.
Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. The use of "including" or "comprising" and the like in the present invention is intended to mean that the elements or items listed before the word "comprise" or "comprising" and the like, include the elements or items listed after the word and their equivalents, but do not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "inner", "outer", "upper", "lower", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.
It should be noted that the sizes and shapes of the figures in the drawings are not to be considered true scale, but are merely intended to schematically illustrate the present invention. And the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout.
A display panel according to an embodiment of the present invention is shown in fig. 1, and includes a display area AA and a non-display area (an area outside the AA), where the display area AA includes a plurality of data lines (D1, D2, D3 \8230;) that are divided into at least two groups of data lines along an arrangement direction of the data lines (in the embodiment of the present invention, fig. 1 takes two groups as an example, and two dashed boxes are shown as a first group B1 and a second group B2, respectively); the non-display area includes a detection circuit, a control circuit, first control lines (SWR 1, SWG1, SWB1, SWR2, SWG2, SWB 2), second control lines (SWH 1, SWH 2), first test lines (DR, DG, DB), and second test lines DH;
the detection circuit comprises a plurality of detection units 10, wherein the output end of each detection unit 10 is electrically connected with different data lines, the input end of each detection unit 10 is electrically connected with a corresponding first test line (for example, the input ends of the detection units 10 electrically connected with D1, D4, dn and Dn +3 are electrically connected with the first test line DR, the input ends of the detection units 10 electrically connected with D2 and Dn +1 are electrically connected with the first test line DG, the input ends of the detection units 10 electrically connected with D3 and Dn +2 are electrically connected with the first test line DB), the control end of each detection unit 10 is electrically connected with a corresponding first control line (for example, the control end of the detection unit 10 electrically connected with D1 and D4 in a first group B1 is electrically connected with the first control line SWR1, the control end of the detection unit 10 electrically connected with D2 is electrically connected with the first control line SWG1, the control end of the detection unit 10 electrically connected with D3 is electrically connected with the first control line SWB 1; the control end of the detection unit 10 electrically connected with Dn and Dn +3 in a second group B2 is electrically connected with the first control line SWR1, and the control line of the detection unit 10 electrically connected with the control line SWB2 electrically connected with the control line SWR 2;
the control circuit includes a plurality of control units 20, the output end of each control unit 20 is electrically connected to different data lines, the input end of each control unit 20 is electrically connected to a corresponding second test line (for example, the input ends of all the detection units 10 electrically connected to the data lines are electrically connected to the second test line DH), and the control end of each control unit 20 is electrically connected to a corresponding second control line (for example, the control ends of all the detection units 10 electrically connected to the data lines in the first group B1 are electrically connected to the second control line SWH1, and the control ends of all the detection units 10 electrically connected to the data lines in the second group B2 are electrically connected to the second control line SWH 2); wherein, the first and the second end of the pipe are connected with each other,
in the electrical detection phase (ET test): each detection unit 10 is configured to be turned on under control of a corresponding first control line, and to input a first test signal to a corresponding data line through a corresponding first test line, and specifically, the detection unit 10 to which D1, D4 are electrically connected is turned on under control of a first control line SWR1 and to input the first test signal to a corresponding data line (D1, D4) through a first test line DR; the detection unit 10 electrically connected to the D2 is turned on under the control of the first control line SWG1, and inputs a first test signal to the data line D2 through the second test line DG; the detecting unit 10 electrically connected to the D3 is turned on under the control of the first control line SWB1, and inputs a first test signal \8230 \ 8230to the data line D3 through the second test line DB; dn, dn +3 are electrically connected to the detecting unit 10, and the detecting unit is controlled by the first control line SWR2 to be turned on, and a first test signal is input to the corresponding data line (Dn, dn + 3) through the first test line DR; the detection unit 10 electrically connected with Dn +1 is turned on under the control of the first control line SWG2, and inputs a first test signal to the data line Dn +1 through the second test line DG; the detecting unit 10 electrically connected with Dn +2 is turned on under the control of the first control line SWB2, and inputs a first test signal to the data line D n +2 through the second test line DB; each control circuit 20 is configured to be turned off under control of a corresponding second control line, and specifically, the data lines D1, D2, D3, D4 \8230ofthe first group B1, the electrically connected control units 20 are turned off under control of the second control line SWH1, the data lines Dn, dn +1, dn +2, dn +3 \8230ofthe second group B2, the electrically connected control units 20 are turned off under control of the second control line SWH 2;
in the Aging stage (L-Aging): the detection unit 10 corresponding to one group of data lines (for example, the first group B1) is configured to be turned on under the control of the corresponding first control line, and a first test signal is input to the corresponding data line through the corresponding first test line, specifically, the detection unit 10 electrically connected to D1 and D4 is turned on under the control of the first control line SWR1, and a first test signal is input to the corresponding data line (D1 and D4) through the first test line DR; the detection unit 10 electrically connected to the D2 is turned on under the control of the first control line SWG1, and inputs a first test signal to the data line D2 through the second test line DG; the sensing unit 10 electrically connected to the D3 is turned on under the control of the first control line SWB1, and inputs a first test signal of 8230; to the data line D3 through the second test line DB; the detection units 10 corresponding to the remaining sets of data lines (e.g., the second set B2) are configured to be turned off under control of the corresponding first control line, specifically, the detection units 10 to which Dn, dn +3 are electrically connected are turned off under control of the first control line SWR2, the detection units 10 to which Dn +1 is electrically connected are turned off under control of the first control line SWG2, and the detection units 10 to which Dn +2 is electrically connected are turned off under control of the first control line SWB 2; each control unit 20 corresponding to the turned-on detection unit (each detection unit 10 of the first group B1) is configured to be turned off under the control of the corresponding second control line, specifically, D1, D2, D3, D4 \8230ofthe first group B1, \8230, and the electrically connected control units 20 are turned off under the control of the second control line SWH 1; each of the control units 20 corresponding to the turned-off detection unit (each of the detection units 10 of the second group B2) is configured to be turned on under the control of the corresponding second control line, and to input the second test signal to the corresponding data line through the corresponding second test line, and specifically, the control units 20 to which Dn, dn +1, dn +2, dn +3 of the second group B2 are electrically connected are turned on under the control of the second control line SWH2, and to input the second test signal to the corresponding data line (Dn, dn +1, dn +2, dn + 3) through the second test line DH.
According to the display panel provided by the embodiment of the invention, the detection circuit and the control circuit are arranged in the non-display area of the display panel, so that the detection circuit can be controlled to be switched on and the control circuit can be controlled to be switched off in the electrical detection stage, and full-screen display is realized; in the aging stage, for a large-size display screen, the OLED devices corresponding to different groups of data lines are respectively aged, the display and aging currents of the OLED devices corresponding to each group of data lines can be reduced to 1/n, n is the number of the data lines, so that the aging process of the large-size OLED products corresponding to the conventional aging power supply can be adopted, and the problem that the aging process of the large-size OLED products cannot be carried out by the conventional aging power supply is solved.
In a specific implementation, as shown in fig. 1, the display area AA further includes a plurality of rows and a plurality of columns of sub-pixels (not shown) with different colors, the sub-pixels in the same column are electrically connected to the same data line, and the sub-pixel columns electrically connected to the same data line have the same color, for example, four sub-pixels electrically connected to the data lines D1, D4, dn, and Dn +3 are all red sub-pixels R, two sub-pixels electrically connected to the data lines D2 and Dn +1 are all green sub-pixels G, and two sub-pixels electrically connected to the data lines D3 and Dn +2 are all blue sub-pixels B.
For the purpose of illustration, fig. 1 only illustrates a part of the data lines and the detection units 10 and the control units 20 corresponding to the part of the data lines.
It should be noted that, for the purpose of illustration, in fig. 1, all data lines in the display panel are only divided into the first group B1 and the second group B2, and of course, the data lines may be divided into three or more groups according to actual needs, which is not limited by the invention.
In a specific implementation, as shown in fig. 2, in the display panel provided in the embodiment of the present invention, the control unit 20 includes a first switch transistor T1, a gate of the first switch transistor T1 is electrically connected to a corresponding second control line (for example, a gate of the first switch transistor T1 corresponding to the first group B1 is electrically connected to the second control line SWH1, a gate of the first switch transistor T1 corresponding to the second group B2 is electrically connected to the second control line SWH 2), a first pole of the first switch transistor T1 is electrically connected to a corresponding second test line (for example, first poles of all the first switch transistors T1 are electrically connected to the second test line DH), and a second pole of the first switch transistor T1 is electrically connected to a corresponding data line.
In a specific implementation, as shown in fig. 2, in the display panel provided in the embodiment of the present invention, the first electrode of each first switch transistor T1 is electrically connected to the same second test line DH, the gates of the first switch transistors corresponding to the same group of data lines are electrically connected to the same second control line, the gates of the first switch transistors corresponding to different groups of data lines are electrically connected to different second control lines, for example, the gate of the first switch transistor T1 corresponding to the first group B1 is electrically connected to the same second control line SWH1, and the gate of the first switch transistor T1 corresponding to the second group B2 is electrically connected to the same second control line SWH 2. The grid electrodes of the first switch transistors corresponding to different groups of data lines are electrically connected with different second control lines, so that the display panel partition aging process can be realized.
In practical implementation, in the display panel provided in the embodiment of the present invention, as shown in fig. 2, the first switch transistor is preferably a P-type transistor.
In a specific implementation, as shown in fig. 2, in the display panel provided in the embodiment of the present invention, the detection unit 10 includes a second switch transistor T2, a gate of the second switch transistor T2 is electrically connected to a corresponding first control line, for example, gates of the second switch transistors T2 electrically connected to D1 and D4 are electrically connected to a first control line SWR1, a gate of the second switch transistor T2 electrically connected to D2 is electrically connected to the first control line SWG1, a gate of the second switch transistor T2 electrically connected to D3 is electrically connected to a first control line SWB1, gates of the second switch transistors T2 electrically connected to Dn and Dn +3 are electrically connected to the first control line SWR2, a gate of the second switch transistor T2 electrically connected to Dn +1 is electrically connected to the first control line SWG2, and a gate of the second switch transistor T2 electrically connected to Dn +2 is electrically connected to the first control line SWB 2; a first pole of the second switch transistor T2 is electrically connected to a corresponding first test line, for example, a first pole of the second switch transistor T2 to which D1, D4, dn +3 are electrically connected is electrically connected to the first test line DR, a first pole of the second switch transistor T2 to which D2, dn +1 are electrically connected is electrically connected to the first test line DG, and a first pole of the second switch transistor T2 to which D3, dn +2 are electrically connected is electrically connected to the first test line DB; the second pole of the second switching transistor T2 is electrically connected to the corresponding data line.
In specific implementation, in the display panel provided in the embodiment of the present invention, as shown in fig. 2, in the same group of data lines (for example, the first group B1), gates of the second switch transistors T2 corresponding to the data lines (D1, D4) electrically connected to the sub-pixel columns of the same color are electrically connected to the same first control line SWR1, and gates of the second switch transistors T2 corresponding to the data lines (for example, D1 and D2) electrically connected to the sub-pixel columns of different colors are electrically connected to different first control lines (corresponding to SWR1 and SWG1, respectively);
in different groups of data lines (for example, the first group B1 and the second group B2), the gates of the second switching transistors T2 corresponding to the data lines (for example, D1 and Dn) electrically connected to the same color sub-pixel column are electrically connected to different first control lines (corresponding to SWR1 and SWR2, respectively).
In specific implementation, in order to unify the manufacturing process, in the display panel provided in the embodiment of the present invention, as shown in fig. 2, the second switching transistor is preferably a P-type transistor.
In practical implementation, in the display panel provided in the embodiment of the present invention, as shown in fig. 1 and fig. 2, the detection circuits (all the detection units 10) and the control circuits (all the control units 20) are located on the same side of the display area AA, and the detection circuits (all the detection units 10) are located between the display area AA and the control circuits (all the control units 20).
It should be noted that SWH1 and SWH2 are independently set with SWR1, SWG1, SWB1, SWR2, SWG2, and SWB2, and DH is independently set with DR, DG, and DB, so the aging process and the electrical testing process are not affected by each other.
In the ET test, all the first switching transistors electrically connected to SWH1 and SWH2 are turned off, and all the second switching transistors electrically connected to SWR1, SWG1, SWB1, SWR2, SWG2, and SWB2 are turned on, so that DR, DG, and DB signals are written, thereby realizing a full-screen display. In the aging process, the subarea aging is adopted, the aging area (for example, the area corresponding to the first group B1) is normally written into DR, DG and DB signals through SWR1, SWG1 and SWB1 signals, and a first switch transistor electrically connected with SWH1 is closed; the second switching transistors electrically connected to SWR2, SWG2, and SWB2 in the non-aging region (for example, the region corresponding to the second group B1) are all turned off, the DR, DG, and DB signals are not written in the non-aging region, the first switching transistor electrically connected to SWH2 turns on the write of the data signal different from the aging region, for example, the write of the "invalid" DH signal, and turns off the non-aging region, and the "invalid" DH signal may be a signal for displaying a black screen. And writing the closed data signal, its signal, to the non-displayed partition.
It should be noted that the display panel provided by the embodiment of the present invention is also suitable for a small-sized display screen, and when the display panel is aged in a full screen mode, all the first switch transistors are turned off, and all the second switch transistors are turned on.
The display panel provided by the embodiment of the invention is suitable for the aging process of the display panel with small size to large size (such as 2 inches to 17 inches).
The following describes the electrical inspection and aging process of the display panel shown in fig. 2 in detail according to the embodiment of the present invention:
in the electrical detection phase: taking the red (R) display as an example, SWH1 and SWH2 are both high level, and all the first switching transistors T1 are turned off; the SWR1, SWG1, SWB1, SWR2, SWG2, and SWB2 are all low level, all the second switch transistors T2 are turned on, the first test lines DR, DG, and DB respectively input the first test signal to the corresponding data lines through the corresponding second switch transistors T2, and at this time, the display panel displays the R picture in full screen as shown in fig. 3;
in the Aging stage (L-Aging): taking red (R) picture display as an example, firstly, aging is performed on a display device corresponding to a first group B1 of data lines, wherein SWH1 is high level, SWR1, SWG1 and SWB1 are low level, SWH2 is low level, SWR2, SWG2 and SWB2 are high level, at this time, a first switch transistor T1 connected with the first group B1 of data lines is turned off, a second switch transistor T2 connected with the first group B1 of data lines is turned on, each first test line DR, DG and DB inputs a first test signal to the corresponding data line through the corresponding second switch transistor T2, at this time, a region corresponding to the first group B1 displays R picture, and an aging process is performed on a region corresponding to the first group B1; meanwhile, the first switch transistor T1, to which the second group B2 data line is electrically connected, is turned on, the second switch transistor T2, to which the second group B2 data line is electrically connected, is turned off, the second test line DH inputs a second test signal to the corresponding data line through the corresponding first switch transistor T1, and the region corresponding to the second group B2 displays a black picture, so that the region corresponding to the first group B1 is aged first, as shown in fig. 4. And then, aging the area corresponding to the second group B2, wherein the principle of aging the area corresponding to the first group B1 is the same, namely, the area corresponding to the second group B2 is controlled to display an R picture, and the area corresponding to the first group B1 displays a black picture.
In summary, the display panel provided in the embodiment of the present invention can implement full-screen display during the ET test and zone aging during the aging process, for example, 2 zones (the first group B1 and the second group B2) are set. During the aging process, the aging process is firstly carried out on the subarea 1 (the first group B1), and the subarea 2 (the second group B2) is closed to display; the section 2 (second group B2) is subjected to an aging process, and the section 1 (first group B1) is turned off. As only 1/2 display area is subjected to pixel display and aging process during aging, the display and aging current can be reduced to 1/2 of the current during full-screen aging, the original monochromatic lighting current (such as 1000 mA) can be reduced to 500mA, and the aging current can also be reduced to 1/2 of the original current, so that the aging process of a large-size OLED product can be realized by the conventional aging equipment.
It should be noted that, in the embodiment of the present invention, the display panel is divided into two regions, which may be, of course, divided into n regions, where n is greater than or equal to 2, so that the aging current may be reduced to 1/n of the original aging current, and the display panel is divided into two regions according to the actual size of the display screen and the current range of the aging power supply in practical application.
Based on the same inventive concept, an embodiment of the present invention further provides a driving method of the display panel, as shown in fig. 5, including:
s501, in an electrical detection stage: each detection unit is conducted under the control of the corresponding first control line, and a first test signal is input to the corresponding data line through the corresponding first test line; each control unit is closed under the control of the corresponding second control line;
s502, in an aging stage: the detection units corresponding to one group of data lines are switched on under the control of the corresponding first control line, first test signals are input to the corresponding data lines through the corresponding first test lines, and the detection units corresponding to the other groups of data lines are switched off under the control of the corresponding first control line; and each control unit corresponding to the turned-on detection unit is turned off under the control of the corresponding second control line, each control unit corresponding to the turned-off detection unit is turned on under the control of the corresponding second control line, and a second test signal is input to the corresponding data line through the corresponding second test line.
In a specific implementation, the detailed process of the driving method of the display panel provided in the embodiment of the present invention may refer to the description of the driving method in the foregoing display panel, which is not described herein again.
Based on the same inventive concept, the embodiment of the invention also provides a display device, which comprises the display panel provided by the embodiment of the invention. The principle of the display device to solve the problem is similar to the display panel, so the implementation of the display device can be referred to the implementation of the display panel, and repeated details are not repeated herein.
In practical implementation, the display device provided in the embodiments of the present invention may be an organic light emitting display device, and is not limited herein.
In a specific implementation, the display device provided in the embodiment of the present invention may be a full-screen display device, or may also be a flexible display device, and is not limited herein.
In specific implementation, the display device provided in the embodiment of the present invention may be a full-screen mobile phone as shown in fig. 6. Of course, the display device provided in the embodiment of the present invention may also be any product or component having a display function, such as a tablet computer, a television, a display, a notebook computer, a digital photo frame, and a navigator. Other essential components of the display device are understood by those skilled in the art, and are not described herein or should not be construed as limiting the invention.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including the preferred embodiment and all changes and modifications that fall within the scope of the invention.
It will be apparent to those skilled in the art that various modifications and variations can be made in the embodiments of the present invention without departing from the spirit or scope of the embodiments of the invention. Thus, if such modifications and variations of the embodiments of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to encompass such modifications and variations.
Claims (8)
1. The display panel is characterized by comprising a display area and a non-display area, wherein the display area comprises a plurality of data lines, and the data lines are divided into at least two groups of data lines along the arrangement direction of the data lines; the non-display area comprises a detection circuit, a control circuit, a first control line, a second control line, a first test line and a second test line;
the detection circuit comprises a plurality of detection units, the output end of each detection unit is electrically connected with different data lines, the input end of each detection unit is electrically connected with the corresponding first test line, and the control end of each detection unit is electrically connected with the corresponding first control line;
the control circuit comprises a plurality of control units, the output end of each control unit is electrically connected with different data lines, the input end of each control unit is electrically connected with the corresponding second test line, and the control end of each control unit is electrically connected with the corresponding second control line; wherein, the first and the second end of the pipe are connected with each other,
in the electrical detection phase: each detection unit is configured to be turned on under control of a corresponding first control line, and a first test signal is input to a corresponding data line through a corresponding first test line; each of the control units is configured to be turned off under control of the corresponding second control line;
in the aging stage: the detection units corresponding to one group of data lines are configured to be turned on under the control of the corresponding first control lines, first test signals are input to the corresponding data lines through the corresponding first test lines, and the detection units corresponding to the rest groups of data lines are configured to be turned off under the control of the corresponding first control lines; each control unit corresponding to the turned-on detection unit is configured to be turned off under control corresponding to the second control line, each control unit corresponding to the turned-off detection unit is configured to be turned on under control corresponding to the second control line, and a second test signal is input to a corresponding data line through a corresponding second test line;
the control unit comprises a first switch transistor, the grid electrode of the first switch transistor is electrically connected with the corresponding second control line, the first pole of the first switch transistor is electrically connected with the corresponding second test line, and the second pole of the first switch transistor is electrically connected with the corresponding data line;
the first electrode of each first switch transistor is electrically connected with the same second test line, the grid electrode of the first switch transistor corresponding to the same group of data lines is electrically connected with the same second control line, and the grid electrode of the first switch transistor corresponding to different groups of data lines is electrically connected with different second control lines.
2. The display panel according to claim 1, wherein the first switching transistor is a P-type transistor.
3. The display panel according to claim 1, wherein the detection unit includes a second switching transistor whose gate is electrically connected to the corresponding first control line, whose first pole is electrically connected to the corresponding first test line, and whose second pole is electrically connected to the corresponding data line.
4. The display panel according to claim 3, wherein the display area further comprises a plurality of rows and columns of sub-pixels with different colors, the sub-pixels in the same column are electrically connected with the same data line, and the color of the sub-pixel column electrically connected with the same data line is the same;
in the same group of data lines, the grid electrodes of the second switching transistors corresponding to the data lines electrically connected with the sub-pixel columns of the same color are electrically connected with the same first control line, and the grid electrodes of the second switching transistors corresponding to the data lines electrically connected with the sub-pixel columns of different colors are electrically connected with different first control lines;
in the different groups of the data lines, the gates of the second switching transistors corresponding to the data lines electrically connected with the sub-pixel columns of the same color are electrically connected with different first control lines.
5. The display panel according to claim 3, wherein the second switching transistor is a P-type transistor.
6. The display panel of claim 1, wherein the detection circuit and the control circuit are located on a same side of the display area, and the detection circuit is located between the display area and the control circuit.
7. A display device comprising the display panel according to any one of claims 1 to 6.
8. A driving method of the display panel according to any one of claims 1 to 6, comprising:
in the electrical detection phase: each detection unit is conducted under the control of the corresponding first control line, and a first test signal is input to the corresponding data line through the corresponding first test line; each control unit is closed under the control of the corresponding second control line;
in the aging stage: the detection units corresponding to one group of data lines are conducted under the control of the corresponding first control lines, first test signals are input to the corresponding data lines through the corresponding first test lines, and the detection units corresponding to the other groups of data lines are closed under the control of the corresponding first control lines; and each control unit corresponding to the turned-on detection unit is turned off under the control of the corresponding second control line, each control circuit corresponding to the turned-off detection unit is turned on under the control of the corresponding second control line, and a second test signal is input to the corresponding data line through the corresponding second test line.
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| KR100636502B1 (en) * | 2005-08-31 | 2006-10-18 | 삼성에스디아이 주식회사 | Organic electro luminescence display for performing sheet unit test and testing method using the same |
| CN105788510A (en) * | 2014-12-17 | 2016-07-20 | 昆山国显光电有限公司 | OLED display device and aging method thereof |
| CN104575382A (en) * | 2015-01-06 | 2015-04-29 | 昆山国显光电有限公司 | Aging compensation system and method for OLED component |
| CN105632383B (en) * | 2016-01-11 | 2018-09-11 | 京东方科技集团股份有限公司 | A kind of test circuit, test method, display panel and display device |
| CN108182900B (en) * | 2018-01-29 | 2021-08-03 | 上海天马有机发光显示技术有限公司 | Display panel aging treatment device and display panel aging treatment method |
| CN109887455B (en) * | 2019-04-26 | 2023-03-10 | 京东方科技集团股份有限公司 | Display panel and display device |
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| CN111696460B (en) * | 2020-06-30 | 2022-07-22 | 武汉天马微电子有限公司 | Display panel, test method thereof and display device |
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