CN110232888B - Display panel, display device and driving method of display device - Google Patents
Display panel, display device and driving method of display device Download PDFInfo
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- CN110232888B CN110232888B CN201910485201.8A CN201910485201A CN110232888B CN 110232888 B CN110232888 B CN 110232888B CN 201910485201 A CN201910485201 A CN 201910485201A CN 110232888 B CN110232888 B CN 110232888B
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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
Abstract
The embodiment of the invention discloses a display panel, a display device and a driving method of the display device. The display panel includes: the circuit comprises a driving circuit, driving signal lines and switch units which are in one-to-one correspondence with the driving signal lines; one end of the driving signal wire is electrically connected with the output end of the driving circuit, and the other end of the driving signal wire is electrically connected with the input end of the corresponding switch unit; the display panel also comprises a detection signal line which is electrically connected with the output end of the switch unit; the switch unit is used for transmitting a driving signal on the corresponding driving signal line to the detection signal line when the switch unit is conducted. Compared with the prior art, the embodiment of the invention avoids the phenomenon that the display panel cannot normally display information when a failure line or a failure area occurs in the use stage of a user, thereby being beneficial to improving the display mode of the display panel and improving the safety of the display panel.
Description
Technical Field
The embodiment of the invention relates to the technical field of display, in particular to a display panel, a display device and a driving method of the display device.
Background
With the continuous development of display technologies, the display panel is also applied more and more widely, for example, the display panel is applied to products such as mobile phones, computers, tablet computers, electronic books and information query machines, and in addition, the display panel can also be applied to instrument displays (such as vehicle-mounted displays) and control panels of smart homes.
In the prior art, when the display panel is applied to the system application end, that is, in the use stage of a user, the display panel may have a display failure line or a display failure area, so as to display a failure image. When the display panel has a failure image, the display image cannot be normally viewed, and the driving safety of the instrument display panel displaying the running information or the road condition information is seriously influenced.
Disclosure of Invention
The embodiment of the invention provides a display panel, a display device and a driving method of the display device, so that the display function of the display panel is detected in the using stage of a user, and the safety of the display panel is improved.
In a first aspect, an embodiment of the present invention provides a display panel, including: a drive circuit, a drive signal line; the switch units correspond to the driving signal lines one to one, and each switch unit comprises an input end and an output end; one end of the driving signal wire is electrically connected with the output end of the driving circuit, and the other end of the driving signal wire is electrically connected with the input end of the corresponding switch unit;
the display panel also comprises a detection signal line which is electrically connected with the output end of the switch unit;
the switch unit is used for transmitting a driving signal on the corresponding driving signal line to the detection signal line when the switch unit is conducted.
In a second aspect, an embodiment of the present invention further provides a display device, where the display device includes: a detection module and a display panel as provided in any of the embodiments of the present invention; the detection signal line is electrically connected with the detection module.
In a third aspect, an embodiment of the present invention further provides a driving method of a display device, where the display device may be the display device provided in any embodiment of the present invention. The driving method of the display device includes: in the phase of the detection of the drive signal line,
the driving circuit sequentially sends driving signals to the driving signal lines;
the switch unit conducts the corresponding driving signal line and the corresponding detection signal line to transmit a detection signal to the detection signal line;
and the detection module determines whether the driving signal line has failure according to the pulse of the detection signal.
According to the embodiment of the invention, the detection signal lines and the switch units which are in one-to-one correspondence with the driving signal lines are arranged, so that the failure state of the driving signal lines of the display panel is detected in the using stage of a user, and the detection of the display function of the display panel in the using stage of the user is realized. Therefore, the display panel can be correspondingly driven according to the detection result, so that the display panel can normally display information, or the display information of the failure area is adjusted to be located in the non-failure area. Therefore, compared with the prior art, the embodiment of the invention avoids the phenomenon that the display panel cannot normally display information when a failure line or a failure area occurs in the use stage of a user, thereby being beneficial to improving the display mode of the display panel and improving the safety of the display panel.
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 detection driving timing sequence when a switch unit is turned on according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a display panel according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of another display panel according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of another display panel according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of another display panel according to an embodiment of the present invention;
fig. 7 is a schematic diagram of a detection driving timing sequence when the first switch unit is turned on according to an embodiment of the present invention;
fig. 8 is a schematic diagram of a detection driving timing sequence when the second switch unit is turned on according to an embodiment of the present invention;
fig. 9 is a schematic structural diagram of another display panel according to an embodiment of the present invention;
fig. 10 is a schematic diagram of a detection driving timing sequence when the first switch unit is turned on according to another embodiment of the present invention;
fig. 11 is a schematic diagram of a detection driving timing sequence when the second switch unit is turned on according to another embodiment of the present invention;
fig. 12 is a schematic structural diagram of another display panel according to an embodiment of the present invention;
fig. 13 is a schematic structural diagram of another display panel according to an embodiment of the present invention;
fig. 14 is a schematic structural diagram of another display panel according to an embodiment of the present invention;
FIG. 15 is a schematic diagram of a detection driving timing sequence when the switch unit is turned on according to another embodiment of the present invention;
fig. 16 is a schematic structural diagram of a display device according to an embodiment of the present invention;
fig. 17 is a flowchart illustrating a driving method of a display device according to an embodiment of the invention;
fig. 18 is a flowchart illustrating another driving method of a display device according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some structures related to the present invention are shown in the drawings, not all of them.
The embodiment of the invention provides a display panel. Fig. 1 is a schematic structural diagram of a display panel according to an embodiment of the present invention. Referring to fig. 1, the display panel includes: the driving circuit 100, the driving signal lines 200, and the switching units 300 corresponding to the driving signal lines 200 one to one. The switch unit 300 includes an input terminal and an output terminal, one end of the driving signal line 200 is electrically connected to the output terminal of the driving circuit 100, and the other end of the driving signal line 200 is electrically connected to the input terminal of the corresponding switch unit 300. The display panel further includes a detection signal line 400, and the detection signal line 400 is electrically connected to an output terminal of the switching unit 300.
The driving circuit 100 is configured to send a driving signal to the sub-pixels of the display panel through the driving signal line 200 to drive the sub-pixels to emit light. When a failure such as a disconnection or a short circuit occurs in the driving signal line 200, an abnormality occurs in a display image of the display panel. The driving circuit 100 may be, for example, a scan driving circuit 100, and correspondingly, the driving signal line 200 may be, for example, a scan line; the driving circuit 100 may be, for example, a data driving circuit 100, and correspondingly, the driving signal line 200 may be, for example, a data line; the driving circuit 100 may be, for example, a timing driver, and correspondingly, the driving signal line 200 may be, for example, a clock signal line or a power supply signal line. In the user using stage, the failure of the driving signal line 200 may cause the sub-pixel electrically connected to the driving signal line 200 to display abnormal, forming a failure line or failure area.
The switch unit 300 corresponds to a loop detection circuit in the display panel, and the switch unit 300 is used to transmit a driving signal on the corresponding driving signal line 200 to the detection signal line 400 when the switch unit is turned on. The detection signal line 400 may be electrically connected to a detection module, which may be disposed on the display panel or disposed at another position of the display device in a plug-in manner, for example. The detection module determines whether there is a failure in the driving signal line 200 by performing time-domain detection on the signal on the detection signal line 400, and determines a failure region and a non-failure region.
Illustratively, the driving method of the display panel comprises a driving signal detection phase and a display phase, wherein the driving signal detection phase can be executed before the display phase, for example, so as to detect whether the driving signal line 200 has failure or not before normal display in time, so as to adopt a display strategy in a targeted manner. In the driving signal line detection stage, the driving circuit 100 sequentially sends driving signals to the driving signal lines 200; the switch unit 300 conducts the corresponding driving signal line 200 and the detection signal line 400 to transmit a detection signal to the detection signal line 400, and the detection signal line 400 sends the detection signal to the detection module; the detection module determines whether there is a failure in the driving signal line 200 according to the pulse on the detection signal line.
Fig. 2 is a schematic diagram of a detection driving timing sequence when a switch unit is turned on according to an embodiment of the present invention. Referring to fig. 2, a signal waveform G1 is a driving signal waveform sent by the driving circuit 100 to the first driving signal line 200, a signal waveform G2 is a driving signal waveform sent by the driving circuit 100 to the second driving signal line 200, a signal waveform G3 is a driving signal waveform sent by the driving circuit 100 to the third driving signal line 200, a signal waveform G4 is a driving signal waveform sent by the driving circuit 100 to the fourth driving signal line 200, a signal waveform G5 is a driving signal waveform sent by the driving circuit 100 to the fifth driving signal line 200, a signal waveform G6 is a driving signal waveform sent by the driving circuit 100 to the sixth driving signal line 200, a signal waveform Gn-1 is a driving signal waveform sent by the driving circuit 100 to the n-th driving signal line 200, a signal waveform Gn is a driving signal waveform sent by the driving circuit 100 to the n-th driving signal line 200, and a signal waveform B is a signal waveform received by the detection signal line 400. When each of the driving signal lines 200 is not open-circuited, the waveform signal on the detection signal line 400 is as shown in the signal waveform B of fig. 2. As can be seen from fig. 2, the pulse waveforms on the detection signal lines 400 correspond to the pulse waveforms on the driving signal lines 200 one to one. When a certain driving signal line 200 is disconnected, the absence of the pulse waveform corresponding to the driving signal line 200 on the signal line 400 is detected, and accordingly, whether the driving signal line 200 is failed or not is determined, and a failed region and a non-failed region are determined.
In the display phase, the switch unit 300 disconnects the corresponding driving signal line 200 from the detection signal line 400; if the driving signal line 200 is failed, controlling the driving circuit 100 to send a driving signal to the driving signal line 200, and driving the display panel to adjust the display information of the failed area to be located in the non-failed area; if the driving signal line 200 is not failed, the driving circuit 100 is controlled to send a driving signal to the driving signal line 200, so as to drive the display panel to display a normal image.
Fig. 3 is a schematic diagram of a display panel according to an embodiment of the present invention, and fig. 4 is a schematic diagram of another display panel according to an embodiment of the present invention. Referring to fig. 3, the fail area 510 is located within the key information display area, affecting the display of key information. The key information may be, for example, information such as vehicle speed and oil amount on the vehicle-mounted display. The display panel provided by the embodiment of the invention can detect the position of the failure area 510, so that in the display stage, the driving circuit can completely display the key information in the non-failure area 520 according to the position of the failure area 510.
In the embodiment of the present invention, the detection signal lines 400 and the switch units 300 corresponding to the driving signal lines 200 one to one are provided, so that the failure state of the driving signal lines 200 of the display panel is detected in the use stage of the user, and the detection of the display function of the display panel is realized in the use stage of the user. Therefore, the display panel can be correspondingly driven according to the detection result, so that the display panel can normally display information, or the display information of the failure area is adjusted to be located in the non-failure area. Therefore, compared with the prior art, the embodiment of the invention avoids the phenomenon that the display panel cannot normally display information when a failure line or a failure area occurs in the use stage of a user, thereby being beneficial to improving the display mode of the display panel and improving the safety of the display panel.
Fig. 5 is a schematic structural diagram of another display panel according to an embodiment of the present invention. Referring to fig. 5, on the basis of the above embodiments, optionally, the display panel further includes a first control signal line 610 and a second control signal line 620, and the switch unit 300 includes the first switch unit 310 and the second switch unit 320 which are arranged in an interlaced manner. The first control signal line 610 is electrically connected to the first switching unit 310, and the second control signal line 620 is electrically connected to the second switching unit 320.
In the embodiment of the present invention, a small number of control signal lines (the first control signal line 610 and the second control signal line 620) and detection signal lines 400 are used, so that both open circuit detection of the driving signal lines 200 and short circuit detection of the driving signal lines 200 can be realized.
The first switch units 310 and the second switch units 320 are alternately arranged, for example, the first switch units 310 may be electrically connected to odd-numbered driving signal lines 200; the second switch unit 320 is electrically connected to the even number of driving signal lines 200, that is, the first switch unit 310 and the second switch unit 320 are exchanged once every other driving signal line 200; alternatively, the first switching unit 310 and the second switching unit 320 are exchanged once every two driving signal lines 200; alternatively, the first switching unit 310 and the second switching unit 320 are exchanged once every other plurality of driving signal lines 200. The arrangement manner in which the first switch unit 310 and the second switch unit 320 are exchanged once every other driving signal line 200 can more accurately determine whether the driving signal line 200 is short-circuited and the position of the short-circuit.
The first switch unit 310 is electrically connected to the odd-numbered driving signal lines 200; the arrangement manner in which the second switch unit 320 is electrically connected to the even-numbered driving signal lines 200 will be described as follows.
Fig. 6 is a schematic structural diagram of another display panel according to an embodiment of the present invention, fig. 7 is a schematic diagram of a detection driving timing sequence when a first switch unit is turned on according to an embodiment of the present invention, and fig. 8 is a schematic diagram of a detection driving timing sequence when a second switch unit is turned on according to an embodiment of the present invention.
Referring to fig. 6-8, in fig. 6, the fourth driving signal line 200 is disconnected at a position 201.
Illustratively, the disconnection detection of the driving signal line 200 includes the steps of:
the driving circuit 100 sequentially transmits driving signals to the driving signal lines 200, and the first switching unit 310 conducts between each corresponding odd driving signal line 200 and the detection signal line 400 to transmit a first detection signal to the detection signal line 400. Referring to fig. 7, since none of the odd-numbered driving signal lines 200 is open-circuited, the pulse waveforms on the detection signal lines 400 correspond to the pulse waveforms on the respective odd-numbered driving signal lines 200 one to one.
The driving circuit 100 sequentially transmits driving signals to the driving signal lines 200, and the second switching unit 320 conducts the even-numbered driving signal lines 200 and the detection signal lines 400 to transmit second detection signals to the detection signal lines 400. Referring to fig. 8, since the fourth driving signal line 200 is disconnected, the driving signal corresponding to the fourth driving signal line 200 by the driving circuit 100 cannot be transmitted to the detection signal line 400, and a pulse missing occurs at a position corresponding to the fourth driving signal line 200 on the detection signal line 400, so that it is determined that the driving signal line 200 is disconnected, and the disconnected position is the fourth driving signal line 200.
Fig. 9 is a schematic structural diagram of another display panel according to an embodiment of the present invention, fig. 10 is a schematic timing diagram of a detection driving when a first switch unit is turned on according to another embodiment of the present invention, and fig. 11 is a schematic timing diagram of a detection driving when a second switch unit is turned on according to another embodiment of the present invention.
Referring to fig. 9-11, in fig. 9, the second driving signal line 200 and the third driving signal line 200 are shorted at a position 202.
Illustratively, the short detection of the driving signal line 200 includes the steps of:
the driving circuit 100 sequentially transmits driving signals to the driving signal lines 200, and the first switching unit 310 conducts between each corresponding odd driving signal line 200 and the detection signal line 400 to transmit a first detection signal to the detection signal line 400. If there is no short circuit on the display panel, only the driving signals on the odd driving signal lines 200 are sent to the detection signal lines 400, and the pulse waveforms on the detection signal lines 400 correspond to the pulse waveforms on the odd driving signal lines 200 one to one. However, referring to fig. 10, since the second driving signal line 200 and the third driving signal line 200 are short-circuited, the driving signal of the driving circuit 100 corresponding to the third driving signal line 200 can be transmitted to the detection signal line 400, and the driving signal of the driving circuit 100 corresponding to the second driving signal line 200 can be transmitted to the third driving signal line 200 and further to the detection signal line 400 through the short-circuited position. Therefore, pulse redundancy occurs at a position on the detection signal line 400 corresponding to the third driving signal line 200, thereby determining that there is a short circuit in the driving signal line 200, and the short circuit position is the second driving signal line 200 and the third driving signal line 200.
The driving circuit 100 sequentially sends driving signals to the driving signal lines 200, and the second switching unit 320 conducts the corresponding even-numbered driving signal lines 200 and the detection signal lines 400 to transmit second detection signals to the detection signal lines 400. If there is no short circuit on the display panel, only the driving signals on the even-numbered driving signal lines 200 are sent to the detecting signal lines 400, and the pulse waveforms on the detecting signal lines 400 correspond to the pulse waveforms on the even-numbered driving signal lines 200 one to one. However, referring to fig. 11, since the second driving signal line 200 and the third driving signal line 200 are short-circuited, the driving signal of the driving circuit 100 corresponding to the second driving signal line 200 can be transmitted to the detection signal line 400, and the driving signal of the driving circuit 100 corresponding to the third driving signal line 200 can be transmitted to the second driving signal line 200 and further to the detection signal line 400 through the short-circuited position. Therefore, pulse redundancy occurs at a position on the detection signal line 400 corresponding to the second driving signal line 200, thereby determining that there is a short circuit in the driving signal line 200, and the short circuit position is the second driving signal line 200 and the third driving signal line 200.
It should be noted that, in the above embodiments, the switch unit 300 is exemplarily shown to include the first switch unit 310 and the second switch unit 320, and the invention is not limited thereto. The switch unit 300 may be provided in various forms, and in practical applications, the switch unit may be set as needed. For example, the switch unit 300 may further include a third switch unit, the third control signal line is electrically connected to the third switch unit, and the first switch unit, the second switch unit, and the third switch unit are alternately and cyclically arranged in sequence and are electrically connected to the corresponding driving signal lines 200, respectively.
Fig. 12 is a schematic structural diagram of another display panel according to an embodiment of the present invention. Referring to fig. 12, on the basis of the foregoing embodiments, optionally, the first switch unit 310 includes a first transistor, a control terminal of the first transistor is electrically connected to the first control signal line 610, a first terminal of the first transistor is electrically connected to the corresponding driving signal line 200, and a second terminal of the first transistor is electrically connected to the detection signal line 400. The second switching unit 320 includes a second transistor, a control terminal of which is electrically connected to the second control signal line 620, a first terminal of which is electrically connected to the corresponding driving signal line 200, and a second terminal of which is electrically connected to the detection signal line 400. In the embodiment of the present invention, the transistor is used as the switch unit 300, and the first transistor and the second transistor can be manufactured in the same process as other transistors on the display panel in the manufacturing process, which is beneficial to reducing the process complexity and thus the cost.
On the basis of the above embodiments, optionally, the driving circuit 100 includes: a scan driving circuit 100; the driving signal line 200 includes a scan line. In the embodiment of the present invention, the switch unit 300 is electrically connected to the scan line, so that the failure state of the scan line is detected. The number of the scanning lines arranged on the display panel is large, and the on-off condition of the scanning lines directly influences the display of the display panel, so that the detection of the scanning lines is beneficial to the prejudgment on whether the display image of the display panel has the failure line or not.
On the basis of the above embodiments, optionally, the driving circuit 100 includes: a data driving circuit 100; the driving signal line 200 includes a data line. The embodiment of the invention realizes the detection of the failure state of the data line by electrically connecting the switch unit 300 with the data line.
Fig. 13 is a schematic structural diagram of another display panel according to an embodiment of the present invention. Referring to fig. 13, on the basis of the foregoing embodiments, the embodiment of the present invention further provides a specific implementation manner, in which the display panel includes a scan driving circuit 110, a data driving circuit 120, scan lines 210, data lines 220, first transistors T1 corresponding to odd scan lines 210 one by one, second transistors T2 corresponding to even scan lines 210 one by one, third transistors T3 corresponding to odd data lines 220 one by one, fourth transistors T4 corresponding to even data lines 220 one by one, a third control signal line 630, a fourth control signal line 640, a fifth control signal line 650, a sixth control signal line 660, a scan detection signal line 410, and a data detection signal line 420.
One end of each odd scan line 210 is electrically connected to the output end of the scan driving circuit 110, and the other end of each odd scan line 210 is electrically connected to the first end of the corresponding first transistor T1. A control terminal of the first transistor T1 is electrically connected to the third control signal line 630, and a second terminal of the first transistor T1 is electrically connected to the scan detection signal line 410.
One end of each even scan line 210 is electrically connected to the output end of the scan driving circuit 110, and the other end of each even scan line 210 is electrically connected to the first end of the corresponding second transistor T2. A control terminal of the second transistor T2 is electrically connected to the fourth control signal line 640, and a second terminal of the second transistor T2 is electrically connected to it.
One end of each odd data line 220 is electrically connected to the output terminal of the data driving circuit 120, and the other end of each even data line 220 is electrically connected to the first end of the corresponding third transistor T3. A control terminal of the third transistor T3 is electrically connected to the fifth control signal line 650, and a second terminal of the third transistor T3 is electrically connected to the data detection signal line 420.
One end of each even-numbered data line 220 is electrically connected to the output terminal of the data driving circuit 120, and the other end of each even-numbered data line 220 is electrically connected to the first end of the corresponding fourth transistor T4. A control terminal of the fourth transistor T4 is electrically connected to the sixth control signal line 660, and a second terminal of the fourth transistor T4 is electrically connected to the sixth control signal line 660.
Illustratively, the driving method of the display panel includes a driving signal line detection phase and a display phase. In the driving signal line detection stage, the scan driving circuit 110 sequentially sends scan signals to the scan lines 210; the first transistor T1 conducts between the odd-numbered scan line 210 and the scan detection signal line 410 to transmit the first scan detection signal to the scan detection signal line 410; the detection module determines the failure positions of the odd-numbered scanning lines 210 according to the pulses of the first scanning detection signal; the scan driving circuit 110 sequentially transmits scan signals to the scan lines 210; the second transistor T2 turns on the even-numbered row scan line 210 to transmit the second scan detection signal; the detection module determines the failure positions of the even-numbered rows of scanning lines 210 according to the pulses of the second scanning detection signal; the data driving circuit 120 sequentially transmits data signals to the data lines 220; the third transistor T3 turns on between the odd row data line 220 and the data detection signal line 420 to transmit the first data detection signal to the data detection signal line 420; the detection module determines the failure position of the odd row data line 220 according to the pulse of the first data detection signal; the data driving circuit 120 sequentially transmits data signals to the data lines 220; the fourth transistor T4 turns on between the even row data line 220 and the second data detection signal line 400 to transmit the second data detection signal to the second data detection signal line 400; the detection module determines the failure position of the even-numbered row of data lines 220 according to the pulse of the second data detection signal; the detection module determines a failure region and a non-failure region according to the failure position of the scan line 210 and the failure position of the data line 220.
In the display stage, the first transistor T1, the second transistor T2, the third transistor T3, and the fourth transistor T4 are all turned off, and if there is a failure in the scan line 210 or the data line 220, the display information of the failure region is adjusted to be located in the non-failure region.
Wherein, the whole display information in the failure area includes: displaying the graphic information of the failure area as character information, and moving to a non-failure area; or, the font of the character information in the failure area is reduced and moved to the non-failure area. Compared with graphic information, the display area occupied by the text information is smaller, and the information of the failure area can be moved to a non-failure area, so that complete information to be displayed can be displayed when the display panel has the failure area.
In the embodiment of the present invention, the data lines 220 and the scan lines 210 are detected in a time-sharing manner, which has the advantage that a phenomenon that the data lines 220 and the scan lines 210 are detected simultaneously to cause a display panel to display in a detection stage is avoided, and the present invention is not limited thereto.
Fig. 14 is a schematic structural diagram of another display panel according to an embodiment of the present invention. Referring to fig. 14, on the basis of the above embodiments, optionally, the detection signal line includes a first detection signal line 410 and a second detection signal line 420; the switching unit includes a first switching unit 310 and a second switching unit 320 which are alternately arranged; the first detection signal line 410 is electrically connected to an output terminal of the first switching unit 410, and the second detection signal line 320 is electrically connected to an output terminal of the second switching unit 320.
Illustratively, the first switching unit 310 is electrically connected to the odd-numbered driving signal lines 200; the second switch unit 320 is electrically connected to the even number of driving signal lines 200, and the detection of the driving signal lines 200 includes the steps of:
the driving circuit 100 sequentially sends driving signals to the driving signal lines 200, and the first switch unit 310 conducts the corresponding driving signal lines 200 and the first detection signal lines 410 to transmit the first detection signals to the first detection signal lines 410; the second switch unit 320 conducts the corresponding driving signal line 200 and the second detection signal line 420 to transmit the second detection signal to the second detection signal line 420.
Fig. 15 is a schematic diagram of another detection driving timing sequence when the switch unit is turned on according to the embodiment of the present invention. Referring to fig. 15, a signal waveform B1 is a signal waveform received by the first detection signal line 410, and a signal waveform B2 is a signal waveform received by the second detection signal line 420. If there is no open circuit or short circuit on the display panel, the driving signals on the odd driving signal lines 200 are sent to the first detection signal lines 410, and the pulse waveforms on the first detection signal lines 410 correspond to the pulse waveforms on the odd driving signal lines 200 one to one; the driving signals on the even-numbered driving signal lines 200 are transmitted to the second detection signal lines 420, and the pulse waveforms on the second detection signal lines 420 correspond to the pulse waveforms on the even-numbered driving signal lines 200 one to one.
If there is an open circuit on the display panel, the pulse waveform corresponding to the driving signal line 200 on the first detecting signal line 410 or the second detecting signal line 420 is missing. If there is a short circuit on the display panel, the pulse waveform of the driving signal line 200 on the first detecting signal line 410 or the second detecting signal line 420 is redundant. Therefore, the embodiment of the invention realizes the short-circuit detection and the open circuit detection of the driving signal wire.
With continued reference to fig. 14, based on the above embodiments, optionally, the display panel includes a display area 710 and a non-display area 720; the switch unit 300 and the driving circuit 100 are respectively disposed in the non-display area 720 at both sides of the display area 710. The switch unit 300 is disposed on the opposite side of the driving circuit 100, and the driving signal line 200 is not required to be extended too much to connect with the switch unit 300, which is beneficial to the wiring of the display panel.
The embodiment of the invention also provides a display device. Fig. 16 is a schematic structural diagram of a display device according to an embodiment of the present invention. Referring to fig. 16, the display device includes: the detection module 20 and the display panel 10 according to any embodiment of the present invention, the detection signal line 400 is electrically connected to the detection module 20. The detection signal line 400 may be electrically connected to the detection module 20, and the detection module 20 may be disposed on the display panel 10, or may be disposed at another position of the display device in an external hanging manner. The detection module 20 determines whether there is a failure of the driving signal line by performing time-domain detection on the signal on the detection signal line 400, and determines a failure region and a non-failure region.
In the embodiment of the present invention, the detection signal lines 400 and the switch units corresponding to the driving signal lines one to one are disposed on the display panel 10, so that the failure state of the driving signal lines of the display panel 10 is detected in the user use stage, and the detection of the display function of the display panel 10 in the user use stage is realized. Therefore, the display device can drive the display panel 10 accordingly according to the detection result, so that the display panel 10 can display information normally, or adjust the display information of the failure region to be located in the non-failure region. Therefore, compared with the prior art, the embodiment of the invention avoids the phenomenon that the display panel 10 cannot normally display information when a failure line or a failure area occurs in the use stage of a user, thereby being beneficial to improving the display mode of the display panel 10 and improving the safety of the display panel 10.
The embodiment of the invention also provides a driving method of the display device, and the driving method of the display device can be applied to the display device provided by any embodiment of the invention. Fig. 17 is a flowchart illustrating a driving method of a display device according to an embodiment of the present invention. Referring to fig. 17, the driving method of the display device includes the steps of:
s110, in a driving signal line detection stage, a driving circuit sequentially sends driving signals to driving signal lines; the switch unit conducts the corresponding driving signal line and the detection signal line to transmit the detection signal to the detection signal line.
And S120, the detection module determines whether the driving signal line fails or not according to the pulse of the detection signal.
In the embodiment of the invention, the driving circuit sequentially sends driving signals to the driving signal lines in the driving signal line detection stage; the switch unit conducts the corresponding driving signal line and the detection signal line to transmit a detection signal to the detection signal line; the detection module determines whether the driving signal line is invalid or not according to the pulse of the detection signal, so that the invalid state of the driving signal line of the display panel is detected in the user using stage, and the display function of the display panel is detected in the user using stage. Therefore, the display device can correspondingly drive the display panel according to the detection result, so that the display panel can normally display information, or the display information of the failure area is adjusted to be positioned in the non-failure area. Therefore, compared with the prior art, the embodiment of the invention avoids the phenomenon that the display panel cannot normally display information when a failure line or a failure area occurs in the use stage of a user, thereby being beneficial to improving the display mode of the display panel and improving the safety of the display panel.
On the basis of the foregoing embodiments, optionally, the switching unit conducts between the corresponding driving signal line and the detection signal line to transmit the detection signal to the detection signal line, and includes:
the first switch unit conducts the corresponding driving signal line and the detection signal line to transmit a first detection signal to the detection signal line;
the second switch unit conducts the corresponding driving signal line and the detection signal line to transmit a second detection signal to the detection signal line.
On the basis of the foregoing embodiments, optionally, the switching unit conducts between the corresponding driving signal line and the detection signal line to transmit the detection signal to the detection signal line, and includes:
the first switch unit conducts the corresponding driving signal line and the first detection signal line to transmit a first detection signal to the first detection signal line;
the second switch unit conducts the corresponding driving signal line and the second detection signal line to transmit the second detection signal to the second detection signal line.
On the basis of the foregoing embodiments, optionally, determining whether there is a failure in the driving signal line according to the pulse of the detection signal includes:
if the first detection signal has pulse increase or the second detection signal has pulse increase, the driving signal line has short circuit.
On the basis of the foregoing embodiments, optionally, determining whether there is a failure in the driving signal line according to the pulse of the detection signal includes:
if the detection signal has pulse missing, the drive signal line has open circuit.
On the basis of the foregoing embodiments, optionally, the method for driving a display device further includes:
the scanning driving circuit sequentially sends scanning signals to the scanning lines;
the switch unit conducts the corresponding scanning line and the scanning detection signal line to transmit a scanning detection signal to the scanning detection signal line;
the detection module determines the failure position of the scanning line according to the pulse of the scanning detection signal;
the data driving circuit sequentially sends data signals to the data lines;
the switch unit conducts the corresponding data line and the data detection signal line to transmit a data detection signal to the data detection signal line;
the detection module detects pulses according to the scanning detection signals and determines the failure positions of the data lines;
the detection module determines a failure region and a non-failure region according to the failure position of the scanning line and the failure position of the data line.
Fig. 18 is a flowchart illustrating another driving method of a display device according to an embodiment of the present invention. Referring to fig. 18, on the basis of the above embodiments, optionally, the driving method of the display device includes the following steps:
s210, in the detection stage of the driving signal line, the driving circuit sequentially sends driving signals to the driving signal line; the switch unit conducts the corresponding driving signal line and the detection signal line to transmit the detection signal to the detection signal line.
S220, the detection module determines whether the driving signal line fails or not according to the pulse of the detection signal.
S230, in the display stage, the switch unit disconnects the corresponding driving signal line from the corresponding detection signal line; and if the driving signal line is failed, adjusting the display information of the failed area to be located in the non-failed area in the display stage.
On the basis of the foregoing embodiments, optionally, adjusting that the display information of the failed area is located in the non-failed area in the display stage includes:
and moving the display information of the failure area to the non-failure area.
On the basis of the foregoing embodiments, optionally, adjusting that the display information of the failed area is located in the non-failed area in the display stage includes:
displaying the graphic information of the failure area as character information, and moving to a non-failure area;
or, the font of the character information in the failure area is reduced and moved to the non-failure area.
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 (11)
1. A display panel, comprising: a drive circuit, a drive signal line; the switch units correspond to the driving signal lines one by one and comprise input ends and output ends; one end of the driving signal wire is electrically connected with the output end of the driving circuit, and the other end of the driving signal wire is electrically connected with the input end of the corresponding switch unit;
the display panel also comprises a detection signal line which is electrically connected with the output end of the switch unit;
the switch unit is used for transmitting a driving signal on the corresponding driving signal line to the detection signal line when the switch unit is switched on;
the display panel further comprises a first control signal line and a second control signal line;
the switch unit comprises a first switch unit and a second switch unit which are arranged in a staggered mode;
the first control signal line is electrically connected with the first switch unit, and the second control signal line is electrically connected with the second switch unit;
the detection signal lines include a first detection signal line and a second detection signal line;
the switch unit comprises a first switch unit and a second switch unit which are arranged in a staggered mode;
the first detection signal line is electrically connected with the output end of the first switch unit, and the second detection signal line is electrically connected with the output end of the second switch unit;
the first switch unit is electrically connected with the odd number of driving signal lines; the second switch unit is electrically connected with even number of the driving signal lines.
2. The display panel according to claim 1, wherein the first switch unit includes a first transistor, a control terminal of the first transistor is electrically connected to the first control signal line, a first terminal of the first transistor is electrically connected to the corresponding driving signal line, and a second terminal of the first transistor is electrically connected to the detection signal line;
the second switch unit comprises a second transistor, a control end of the second transistor is electrically connected with the second control signal line, a first end of the second transistor is electrically connected with the corresponding driving signal line, and a second end of the second transistor is electrically connected with the detection signal line.
3. The display panel according to claim 1, wherein the driving circuit comprises: a scan driving circuit;
the driving signal lines include scan lines.
4. The display panel according to claim 1, wherein the driving circuit comprises: a data driving circuit;
the driving signal lines include data lines.
5. The display panel according to claim 1, wherein the display panel comprises a display region and a non-display region;
the switch unit and the driving circuit are respectively arranged in the non-display area at two sides of the display area.
6. A display device, comprising: a detection module and a display panel according to any one of claims 1-5; the detection signal line is electrically connected with the detection module.
7. A driving method of a display device, the display device comprising: the device comprises a detection module, a driving circuit and a driving signal wire; the switch units correspond to the driving signal lines one by one and comprise input ends and output ends; one end of the driving signal line is electrically connected with the output end of the driving circuit, and the other end of the driving signal line is electrically connected with the input end of the corresponding switch unit;
the display device also comprises a detection signal wire, wherein one end of the detection signal wire is electrically connected with the output end of the switch unit, and the other end of the detection signal wire is electrically connected with the detection module;
the driving method of the display device includes: in the phase of the detection of the drive signal line,
the driving circuit sequentially sends driving signals to the driving signal lines;
the switch unit conducts the corresponding driving signal line and the corresponding detection signal line to transmit a detection signal to the detection signal line;
the detection module determines whether the driving signal line is invalid or not according to the pulse of the detection signal;
the display device further comprises a first control signal line and a second control signal line;
the switch unit comprises a first switch unit and a second switch unit;
the first control signal line is electrically connected with the first switch unit, and the first switch unit is electrically connected with odd drive signal lines;
the second control signal line is electrically connected with the second switch unit, and the second switch unit is electrically connected with the even number of driving signal lines;
the detection signal line comprises a first detection signal line and a second detection signal line;
the switch unit comprises a first switch unit and a second switch unit which are arranged in a staggered mode;
the first detection signal line is electrically connected with the output end of the first switch unit, and the second detection signal line is electrically connected with the output end of the second switch unit;
the switch unit conducts the corresponding driving signal line and the detection signal line to transmit a detection signal to the detection signal line, and includes:
the first switch unit conducts the corresponding driving signal line and the first detection signal line to transmit a first detection signal to the first detection signal line;
the second switch unit conducts the corresponding driving signal line and the second detection signal line to transmit a second detection signal to the second detection signal line;
determining whether the driving signal line has a failure according to the pulse of the detection signal, including:
if the first detection signal has pulse increase or the second detection signal has pulse increase, the driving signal line has short circuit;
and if the detection signal has pulse missing, the driving signal wire has open circuit.
8. The method for driving a display device according to claim 7, wherein the driving circuit includes a scan driving circuit and a data driving circuit, and the driving signal lines include scan lines and data lines; the detection signal line comprises a data detection signal line and a scanning detection signal line;
the driving method of the display device further includes:
the scanning driving circuit sequentially sends scanning signals to the scanning lines;
the switch unit conducts the corresponding scanning line and the scanning detection signal line to transmit a scanning detection signal to the scanning detection signal line;
the detection module determines the failure position of the scanning line according to the pulse of the scanning detection signal;
the data driving circuit sequentially sends data signals to the data lines;
the switch unit conducts the corresponding data line and the data detection signal line to transmit a data detection signal to the data detection signal line;
the detection module detects pulses according to the scanning detection signals and determines the failure positions of the data lines;
the detection module determines a failure region and a non-failure region according to the failure position of the scanning line and the failure position of the data line.
9. The method for driving a display device according to claim 8, further comprising: a display stage; in the display phase, the display device is provided with a display screen,
the switch unit disconnects the corresponding driving signal line from the corresponding detection signal line;
and if the driving signal line is failed, adjusting the display information of the failed area to be positioned in the non-failed area in the display stage.
10. The method for driving the display device according to claim 9, wherein adjusting the display information of the failure region to be located in the non-failure region in the display stage includes:
and moving the display information of the failure area to the non-failure area.
11. The method for driving the display device according to claim 9, wherein adjusting the display information of the failure region to be located in the non-failure region in the display stage includes:
displaying the graphic information of the failure area as character information, and moving to the non-failure area;
or, the font of the character information in the failure area is reduced and the character information is moved to the non-failure area.
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| CN115019703B (en) * | 2021-11-30 | 2023-05-09 | 荣耀终端有限公司 | Display panel, detection method and electronic equipment |
| CN114863849A (en) * | 2022-04-19 | 2022-08-05 | 武汉华星光电半导体显示技术有限公司 | Display panel and display device |
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| CN101303462A (en) * | 2008-07-04 | 2008-11-12 | 友达光电股份有限公司 | Liquid crystal display panel testing circuit and method |
| TWI412766B (en) * | 2009-09-04 | 2013-10-21 | Wintek Corp | Active device array and testing method |
| US9583033B2 (en) * | 2011-11-25 | 2017-02-28 | Lg Display Co., Ltd. | Display panel for display device and method for detecting defects of signal lines for display devices |
| CN103186000A (en) * | 2011-12-31 | 2013-07-03 | 上海中航光电子有限公司 | Liquid crystal display device and test method thereof |
| CN103513477B (en) * | 2012-06-26 | 2018-03-09 | 富泰华工业（深圳）有限公司 | Liquid crystal display and its detection method |
| CN103217844B (en) * | 2013-04-01 | 2015-06-24 | 合肥京东方光电科技有限公司 | Display panel and display device |
| CN103544912B (en) * | 2013-10-25 | 2016-02-03 | 深圳市华星光电技术有限公司 | Panel detection device and display panel |
| CN105575301B (en) * | 2015-12-18 | 2019-05-24 | 上海天马微电子有限公司 | The signal line detecting method of array substrate |
| CN106356013B (en) * | 2016-10-26 | 2019-06-07 | 上海天马微电子有限公司 | A kind of array substrate, detection circuit and its circuit break and short circuit detection method |
| CN106773174A (en) * | 2016-12-30 | 2017-05-31 | 武汉华星光电技术有限公司 | The method of testing and test device of display panel |
| CN107065353A (en) * | 2017-04-26 | 2017-08-18 | 上海天马有机发光显示技术有限公司 | The method of testing of display panel and display panel |
| CN106981262B (en) * | 2017-05-15 | 2020-11-20 | 上海中航光电子有限公司 | Display panel and failure detection method |
| CN108415618B (en) * | 2018-05-09 | 2022-01-07 | 上海歌尔泰克机器人有限公司 | Method and device for controlling display of display screen and touch screen |
| CN109119043A (en) * | 2018-09-30 | 2019-01-01 | 惠科股份有限公司 | Display panel and its driving method, display device |
| CN109493785A (en) * | 2018-12-28 | 2019-03-19 | 厦门天马微电子有限公司 | A kind of display panel and its driving method, display device |
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