CN109949742B - Display panel's drive circuit and display panel - Google Patents
Display panel's drive circuit and display panel Download PDFInfo
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- CN109949742B CN109949742B CN201711382384.8A CN201711382384A CN109949742B CN 109949742 B CN109949742 B CN 109949742B CN 201711382384 A CN201711382384 A CN 201711382384A CN 109949742 B CN109949742 B CN 109949742B
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Abstract
The embodiment of the invention discloses a display panel and a driving circuit thereof. The driving circuit comprises a control module, the control module comprises an enabling signal input end and a power supply signal output end, and the control module is used for providing a power supply signal for the display panel; the detection module comprises an enable signal output end and a power supply signal input end, wherein the enable signal output end is electrically connected with the enable signal input end, and the power supply signal output end is electrically connected with the power supply signal input end; the detection module is used for outputting an enable signal to the enable signal input end through the enable signal output end when a power signal input by the power signal input end is larger than a set power signal, and the control module is used for controlling the power signal output end to stop outputting the power signal according to the enable signal input by the enable signal input end. By the technical scheme, the problem that the control module or the display panel is damaged due to the abnormal power supply signal output by the control module is effectively solved.
Description
Technical Field
The embodiment of the invention relates to the technical field of display, in particular to a display panel and a driving circuit thereof.
Background
At present, a current mutation phenomenon often occurs on a driving circuit board for driving a display panel to realize a display function due to various reasons, and a large current generated by mutation can cause damage to a control module in the display panel and even the whole display panel.
Disclosure of Invention
In view of this, embodiments of the present invention provide a driving circuit of a display panel and a display panel, in which a detection module is disposed in the driving circuit of the display panel, and the detection module is configured to output an enable signal to an enable signal input end of a control module through an enable signal output end when a power signal input by a power signal input end is greater than a set power signal, and the control module controls a corresponding power signal output end to terminate outputting the power signal to the display panel according to the enable signal input by the enable signal input end, so that the output of the power signal from the control module to the display panel is terminated when the power signal output from the control module to the display panel is abnormal, and the problem of damage to the control module or the display panel caused by the abnormality of the power signal output by the control module is effectively avoided.
In a first aspect, an embodiment of the present invention provides a driving circuit for a display panel, including:
the control module comprises an enabling signal input end and a power supply signal output end, and is used for providing a power supply signal for the display panel;
the detection module comprises an enable signal output end and a power signal input end, the enable signal output end is electrically connected with the enable signal input end, and the power signal output end is electrically connected with the power signal input end;
the detection module is used for outputting an enable signal to the enable signal input end through the enable signal output end when a power signal input by the power signal input end is larger than a set power signal, and the control module is used for controlling the power signal output end to stop outputting the power signal according to the enable signal input by the enable signal input end.
Furthermore, the enable signal input end comprises a first enable signal input end and a second enable signal input end, and the power signal output end comprises a first power signal output end, a second power signal output end and a third power signal output end; the power supply signal input ends comprise a first power supply signal input end, a second power supply signal input end and a third power supply signal input end, and the first power supply signal output end to the third power supply signal output end are respectively and correspondingly and electrically connected with the first power supply signal input end to the third power supply signal input end;
the control module is used for controlling the first power supply signal output end to stop outputting the power supply signal according to the enable signal input by the first enable signal input end, and the control module is used for controlling the second power supply signal output end and the third power supply signal output end to stop outputting the power supply signal according to the enable signal input by the second enable signal input end.
Further, the display panel includes:
the driving module comprises a driving power signal input end, a first driving signal output end and a second driving signal output end, the driving power signal input end is electrically connected with the first power signal output end, the first driving signal output end is electrically connected with the gate driving circuit, the second driving signal output end is electrically connected with the source driving circuit, the driving module is used for controlling the first driving signal output end to output a signal to the gate driving circuit according to a power signal input by the driving power signal input end, and the driving module is used for controlling the second driving signal output end to output a signal to the source driving circuit according to a power signal input by the driving power signal input end;
the pixel driving module comprises a first pixel power signal input end and a second pixel power signal input end, the first pixel power signal input end is electrically connected with the second power signal output end, the second pixel unit signal output end is electrically connected with the third power signal output end, and the pixel driving module is used for driving the display panel to display according to power signals input by the first pixel power signal input end and the second pixel power signal input end.
Further, the enable signal output end comprises a first enable signal output end and a second enable signal output end, the first enable signal output end is electrically connected with the first enable signal input end, and the second enable signal output end is electrically connected with the second enable signal input end;
the detection module is used for outputting an enabling signal to the first enabling signal input end through the first enabling signal output end when a power signal input by the first power signal input end is larger than a first set power signal, and the detection module is used for controlling the second enabling signal output end to output the enabling signal to the second enabling signal input end when a power signal input by the second power signal input end is larger than a second set power signal or a power signal input by the third power signal input end is larger than a third set power signal.
Further, the driving circuit further includes:
the signal conversion module is electrically connected with the enable signal input end through the enable signal output end and comprises a signal input end, a third enable signal output end and a fourth enable signal output end, the signal input end is electrically connected with the enable signal output end, the third enable signal output end is electrically connected with the first enable signal input end, and the fourth enable signal output end is electrically connected with the second enable signal input end;
the detection module is used for controlling the enable signal output end to output an enable signal to the signal input end when a power signal input by the first power signal input end is greater than a first set power signal or a power signal input by the second power signal input end is greater than a second set power signal or a power signal input by the third power signal input end is greater than a third set power signal;
the signal conversion module is used for controlling the third enable signal output end to output an enable signal to the first enable signal input end according to the enable signal input by the signal input end so as to control the first power signal output end to stop outputting the power signal, and the signal conversion module is used for controlling the fourth enable signal output end to output an enable signal to the second enable signal input end according to the enable signal input by the signal input end so as to control the second power signal output end and the third power signal output end to stop outputting the power signal.
Further, the driving circuit further includes:
the indicating module comprises an indicating signal input end, the indicating signal input end is electrically connected with the enabling signal output end, and the indicating module is used for emitting light when the enabling signal is input by the indicating signal input end.
Further, the driving circuit further includes:
and the control module is used for providing a power supply signal for the display panel through the interface module.
Further, the driving circuit further includes:
the external power supply module comprises an external power supply signal output end, the control module comprises an external power supply signal input end, and the external power supply signal output end is electrically connected with the external power supply signal input end.
Furthermore, the control module further comprises a first capacitive reactance element, a second capacitive reactance element, a third capacitive reactance element and a voltage stabilizing element;
one end of the first capacitive reactance element is electrically connected with the first power signal output end, and the other end of the first capacitive reactance element is electrically connected with a ground wire; one end of the second capacitive reactance element is electrically connected with the second power signal output end, and the other end of the second capacitive reactance element is electrically connected with a ground wire; one end of the third capacitive reactance element is electrically connected with the third power signal output end and the first end of the voltage stabilizing element, and the other end of the third capacitive reactance element is electrically connected with the ground wire and the second end of the voltage stabilizing element.
In a second aspect, an embodiment of the present invention further provides a display panel including the driving circuit of the display panel of the first aspect.
The embodiment of the invention provides a driving circuit of a display panel and the display panel, wherein a detection module is arranged in the driving circuit of the display panel, an enable signal output end of the detection module is electrically connected with an enable signal input end of a control module, a power signal input end of the detection module is electrically connected with a power signal output end of the control module, the detection module is arranged to output an enable signal to an enable signal input end of the control module through the enable signal output end when a power signal input by the power signal input end is larger than a set power signal, the control module can control the power signal output end to stop outputting the power signal to the display panel according to the enable signal input by the enable signal input end, namely, the output of the power signal from the control module to the display panel is stopped when the power signal output from the control module to the display panel is abnormal, and the problem that the control module or the display panel is damaged due to the abnormal power signal output by the control module is effectively avoided.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, a brief description will be given below of the drawings required for the embodiments or the technical solutions in the prior art, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a driving circuit of a display panel according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a display panel according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a pixel unit according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a driving circuit of another display panel according to an embodiment of the present invention;
fig. 5 is a schematic diagram of a connection end of an interface module according to an embodiment of the present invention;
fig. 6 is a schematic diagram of a connection end of a control module according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures. Throughout this specification, the same or similar reference numbers refer to the same or similar structures, elements, or processes. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.
The embodiment of the invention provides a driving circuit of a display panel, which comprises a control module and a detection module, wherein the control module comprises an enabling signal input end and a power signal output end, the control module is used for providing a power signal for the display panel, the detection module comprises an enabling signal output end and a power signal input end, the enabling signal output end is electrically connected with the enabling signal input end, and the power signal output end is electrically connected with the power signal input end. The detection module is used for outputting an enable signal to the enable signal input end through the enable signal output end when a power signal input by the power signal input end is larger than a set power signal, and the control module is used for controlling the power signal output end to stop outputting the power signal according to the enable signal input by the enable signal input end.
The current mutation phenomenon often appears in a driving circuit board for driving a display panel to realize a display function due to various reasons, and large current generated by mutation can cause damage to a control module in the display panel and even the whole display panel, after the control module or the display panel in the display panel is burnt, whether the control module or the display panel in the display panel is damaged or not can be determined through long-time debugging and analysis, so that the detection time and cost of the display panel are greatly increased, and how to avoid the damage to the control module or the display panel in the display panel due to the large current mutation in a development and verification stage is of great importance.
The embodiment of the invention arranges the detection module in the drive circuit of the display panel, the enable signal output end of the detection module is electrically connected with the enable signal input end of the control module, the power supply signal input end of the detection module is electrically connected with the power supply signal output end of the control module, the detection module is arranged to output the enable signal to the enable signal input end of the control module through the enable signal output end when the power supply signal input by the power supply signal input end is greater than the set power supply signal, the control module can control the power supply signal output end to stop outputting the power supply signal to the display panel according to the enable signal input by the enable signal input end, namely, the output of the power supply signal from the control module to the display panel is stopped when the power supply signal from the control module to the display panel is abnormal, so that the problem that the control module or the display panel is damaged due to the abnormal power supply signal from the control module is effectively solved.
The above is the core idea of the present invention, and the technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the drawings in the embodiment of the present invention. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without any creative work belong to the protection scope of the present invention.
Fig. 1 is a schematic structural diagram of a driving circuit of a display panel according to an embodiment of the present invention. As shown in fig. 1, the driving circuit includes a control module 1 and a detection module 2, the control module 1 includes an enable signal input terminal a and a power signal output terminal B, the detection module 2 includes an enable signal output terminal C and a power signal input terminal D, the enable signal output terminal C is electrically connected to the enable signal input terminal a, and the power signal output terminal B is electrically connected to the power signal input terminal D. The control module 1 is used for providing a power signal to the display panel, and a power signal output end B of the control module 1 is electrically connected with a corresponding signal end of the display panel 3, and provides the power signal to the display panel 3 to supply the power signal to the display panel 3 to realize a display function. The detection module 2 can output an enable signal to the enable signal input end a through the enable signal output end C when the power signal input by the power signal input end D is greater than the set power signal, and the control module 1 is used for controlling the power signal output end B to terminate outputting the power signal according to the enable signal input by the enable signal input end a.
Alternatively, as shown in fig. 1, the enable signal input terminal a of the control module 1 may include a first enable signal input terminal a1 and a second enable signal input terminal a2, the power signal output terminal B of the control module 1 may include a first power signal output terminal B1, a second power signal output terminal B2 and a third power signal output terminal B3, and correspondingly, the power signal input terminal D of the detection module 2 may include a power signal input terminal D, a first power signal input terminal D1, a second power signal input terminal D2 and a third power signal input terminal D3, and the first power signal output terminal B1, the second power signal output terminal B2 and the third power signal output terminal B3 are electrically connected to the first power signal input terminal D1, the second power signal input terminal D2 and the third power signal input terminal D3, respectively. The control module 1 may control the first power signal output terminal B1 to terminate outputting the power signal according to the enable signal input from the first enable signal input terminal a1, and the control module 1 may control the second power signal output terminal B2 and the third power signal output terminal B3 to terminate outputting the power signal according to the enable signal input from the second enable signal input terminal a 2.
Fig. 2 is a schematic structural diagram of a display panel according to an embodiment of the present invention. Referring to fig. 1 and 2, the display panel may include a driving module 31, a gate driving circuit 32, the driving module 31 includes a driving power signal input terminal K11, a first driving signal output terminal K12 and a second driving signal output terminal K13, the driving power signal input terminal K11 is electrically connected to the first power signal output terminal B1, the first driving signal output terminal K12 is electrically connected to the gate driving circuit 32, the second driving signal output terminal K13 is electrically connected to the source driving circuit 33, the driving module 31 is configured to control the first driving signal output terminal K12 to output a signal to the gate driving circuit 32 according to a power signal input by the driving power signal input terminal K11, and the second driving module 31 is configured to control the second driving signal output terminal K13 to output a signal to the source driving circuit 33 according to a power signal input by the driving power signal input terminal K11. The pixel driving module 34 includes a first pixel power signal input terminal K21 and a second pixel power signal input terminal K22, the first pixel power signal input terminal K21 is electrically connected to the second power signal output terminal B2, the second pixel power signal input terminal K22 is electrically connected to the third power signal output terminal B3, and the pixel driving module 34 is configured to drive the display panel 3 to display according to the power signals input by the first pixel power signal input terminal K21 and the second pixel power signal input terminal K22.
Specifically, referring to fig. 1 and fig. 2, the gate driving circuit 32 and the source driving circuit 33 are both electrically connected to the pixel driving module 34, the gate driving circuit 32 can provide a gate driving signal to the pixel driving module 34, and the source driving circuit 33 can provide a source driving signal to the pixel driving module 34. The control module 1 may provide a power signal to the driving module 31 through the first power signal output terminal B1 and the driving power signal input terminal K11, the driving module 31 may convert the received power signal into a gate driving voltage through the gate driving circuit 32, the gate driving voltage may be, for example, a pulse signal with alternating high and low levels, the driving module 31 may further convert the received power signal into a source driving voltage through the source driving circuit 33, the source driving voltage is related to a gray level value of a pixel in a pre-display frame of the display panel, and the pixel driving module 34 in the display panel drives the display panel under the effect of the gate driving voltage and the source driving voltage to implement a display function.
Specifically, as shown in fig. 2, the pixel driving module 34 may include a plurality of pixel units 341, fig. 3 is a schematic structural diagram of a pixel unit according to an embodiment of the present invention, fig. 3 exemplarily sets that the pixel unit 341 is composed of two thin film transistors T and one capacitor C, and the embodiment of the present invention does not limit the number of the thin film transistors T and the capacitors C in the pixel unit 341. As shown in fig. 3, the thin film transistor T1 is a switching transistor, the thin film transistor T2 is a driving transistor, the thin film transistor T1 is used for writing a data signal into the gate of the thin film transistor T2, and the driving current generated by the thin film transistor T2 is used for driving the pixel structure 311 in the display panel 3 to emit light, so as to realize the display function of the display panel.
Referring to fig. 1, 2 and 3, the second power signal output terminal B2 of the control module 1 may provide a power signal to the signal terminal ELVDD of the pixel unit 341 in the pixel driving module 31 through the first pixel power signal input terminal K21, the third power signal output terminal B3 of the control module 1 may provide a power signal to the signal terminal ELVSS of the pixel unit 341 in the pixel driving module 31 through the second pixel power signal input terminal K22, and the driving current generated by the thin film transistor T2 is related to the voltages of the signal terminal ELVDD and the signal terminal ELVSS.
Optionally, as shown in fig. 1, the enable signal output terminal C of the detecting module 2 may include a first enable signal output terminal C1 and a second enable signal output terminal C2, the first enable signal output terminal C1 is electrically connected to the first enable signal input terminal a1, and the second enable signal output terminal C2 is electrically connected to the second enable signal input terminal a 2. The detection module 2 outputs an enable signal to the first enable signal input terminal a1 through the first enable signal output terminal C1 when the power signal input from the first power signal input terminal D1 is greater than the first set power signal, and controls the second enable signal output terminal C2 to output an enable signal to the second enable signal input terminal a2 when the power signal input from the second power signal input terminal D2 is greater than the second set power signal or the power signal input from the third power signal input terminal D3 is greater than the third set power signal.
For example, when the power signal input from the first power signal input terminal D1 of the detection module 2 is greater than the first set power signal, for example, when the current of the power signal input from the first power signal input terminal D1 of the detection module 2 is greater than the first set current value, it may be determined that the current of the power signal output from the first power signal output terminal B1 of the control module 1 is too large, at this time, the first enable signal output terminal C1 of the detection module 2 outputs an enable signal to the first enable signal input terminal a1 of the control module 1, where the enable signal may be a high level signal, and the first enable signal input terminal a1 of the control module 1 controls the first power signal output terminal B1 to terminate outputting the power signal under the action of the high level signal, that is, controls the first power signal output terminal B1 to no longer output the power signal to the display panel 3.
Similarly, when the power signal input from the second power signal input terminal D2 of the detection module 2 is greater than the second set power signal, for example, the current of the power signal input from the second power signal input terminal D2 of the detection module 2 is greater than the second set current value, it can be determined that the current of the power signal output from the second power signal output terminal B2 of the control module 1 is too large, at this time, the second enable signal output terminal C2 of the detection module 2 outputs the enable signal to the second enable signal input terminal a2 of the control module 1, and the second enable signal input terminal a2 of the control module 1 controls the second power signal output terminal B2 to terminate outputting the power signal under the effect of the enable signal. When the power signal input from the third power signal input terminal D3 of the detection module 2 is greater than the third set power signal, for example, the current of the power signal input from the third power signal input terminal D3 of the detection module 2 is greater than the third set current value, it can be determined that the current of the power signal output from the third power signal output terminal B3 of the control module 1 is too large, at this time, the second enable signal output terminal C2 of the detection module 2 outputs an enable signal to the second enable signal input terminal a2 of the control module 1, and the second enable signal input terminal a2 of the control module 1 controls the third power signal output terminal B3 to terminate outputting the power signal under the action of the enable signal.
Therefore, the detection module 2 can effectively detect whether the power signal output by the power signal output end B of the control module 1 has abnormal phenomena such as current mutation, and the power signal output by the power signal output end B corresponding to the control module 1 is stopped to output the power signal to the display panel 3, so that the problem that the control module 1 or the display panel 3 is damaged due to the abnormal power signal output by the control module 1 is effectively avoided.
Fig. 4 is a schematic structural diagram of a driving circuit of another display panel according to an embodiment of the present invention. As shown in fig. 4, different from fig. 1, the driving circuit may further include a signal conversion module 4, the enable signal output terminal C of the detection module 2 may be electrically connected to the enable signal input terminal a of the control module 1 through the signal conversion module 4, the signal conversion module 4 includes a signal input terminal E, a third enable signal output terminal F1 and a fourth enable signal output terminal F2, the signal input terminal E of the signal conversion module 4 is electrically connected to the enable signal output terminal C of the detection module 2, the third enable signal output terminal F1 of the signal conversion module 4 is electrically connected to the first enable signal input terminal a1 of the control module 1, and the fourth enable signal output terminal F2 of the signal conversion module 4 is electrically connected to the second enable signal input terminal a2 of the control module 1.
The detection module 2 is used for detecting whether the power signal inputted from the first power signal input terminal D1 is greater than the first set power signal or the power signal inputted from the second power signal input terminal D2 is greater than the second set power signal or the power signal inputted from the third power signal input terminal D3 is greater than the third set power signal, the control enable signal output end C outputs an enable signal to the signal input end E, the signal conversion module 4 controls the third enable signal output end F1 to output an enable signal to the first enable signal input end a1 according to the enable signal input by the signal input end E to control the first power signal output end B1 to stop outputting the power signal, and the signal conversion module 4 controls the fourth enable signal output end F2 to output an enable signal to the second enable signal input end a2 according to the enable signal input by the signal input end E to control the second power signal output end B2 and the third power signal output end B3 to stop outputting the power signal.
For example, when the power signal input from the first power signal input terminal D1 of the detection module 2 is greater than the first set power signal, for example, the current of the power signal input from the first power signal input terminal D1 of the detection module 2 is greater than the first set current value, or when the power signal input from the second power signal input terminal D2 of the detection module 2 is greater than the second set power signal, for example, the current of the power signal input from the second power signal input terminal D2 of the detection module 2 is greater than the second set current value, or when the power signal input from the third power signal input terminal D3 of the detection module 2 is greater than the third set power signal, for example, the current of the power signal input from the third power signal input terminal D3 of the detection module 2 is greater than the third set current value, it may be determined that the current of the power signal output from at least one of the first power signal output terminal B1, the second power signal output terminal B2, or the third power signal output terminal B3 of the control module 1 is If the voltage is too large, the enable signal output terminal C of the detection module 2 outputs an enable signal to the signal input terminal E of the signal conversion module 4, the enable signal may be a high level signal, the signal conversion module 4 controls the third enable signal output terminal F1 to output an enable signal to the first enable signal input terminal a1 of the control module 1 under the action of the high level signal, and controls the fourth enable signal output terminal F2 to output an enable signal to the second enable signal input terminal a2 of the control module 1, the third enable signal output terminal F1 and the fourth enable signal output terminal F2 of the signal conversion module 4 may be high level signals, for example, the first enable signal input terminal a1 of the control module 1 controls the first power signal output terminal B1 to terminate the output of the power signal under the action of the high level signal, and the second enable signal input terminal a2 of the control module 1 controls the second power signal output terminal B2 and the third power signal output terminal B1 to terminate the output of the power signal under the action of the high level signal The power signal output terminal B3 terminates the output power signal.
Therefore, the detection module 2 can effectively detect whether the power signal output by the power signal output end B of the control module 1 has abnormal phenomena such as current mutation, the enable signal output by the detection module 2 is converted into two paths of signals by the signal conversion module 4 and transmitted to the first enable signal input end a1 and the second enable signal input end a2 of the control module 1, after the control module 1 receives the enable signal, the power signal output end B corresponding to the control module 1 is stopped from outputting the power signal to the display panel 3, and the problem that the control module 1 or the display panel 3 is damaged due to the abnormal power signal output by the control module 1 is effectively solved.
It should be noted that the high level and the low level mentioned in the above embodiments are only relative concepts, and the embodiments of the present invention do not limit the level values of the high level and the low level.
Optionally, as shown in fig. 1 and fig. 4, the driving circuit may further include an indication module 5, the indication module 5 includes an indication signal input end G, the indication signal input end G of the indication module 5 is electrically connected to the enable signal output end C of the detection module 2, the indication module 5 is configured to emit light when the indication signal input end G inputs an enable signal, for example, the indication module 5 may be a light emitting diode.
As shown in fig. 1, the detecting module 2 includes a first enable signal output terminal C1 and a second enable signal output terminal C2, and the driving circuit may include two indicating modules 5, wherein an indicating signal input terminal G of the indicating module 51 is electrically connected to the first enable signal output terminal C1, and an indicating signal input terminal G of the indicating module 52 is electrically connected to the second enable signal output terminal C2. When the power signal inputted from the first power signal input terminal D1 of the detection module 2 is greater than the first set power signal, the first enable signal output terminal C1 outputs an enable signal, which may be high level, for example, the indication module 51 electrically connected to the first enable signal output terminal C1 emits light, so as to determine that the power signal outputted from the first power signal output terminal B1 of the control module 1 is abnormal. When the power signal inputted from the second power signal input terminal D2 of the detection module 2 is greater than the second set power signal or the power signal inputted from the third power signal input terminal D3 is greater than the third set power signal, the second enable signal output terminal C2 outputs an enable signal, which may be, for example, a high level, so that the indication module 52 electrically connected to the second enable signal output terminal C2 emits light, and it can be determined that the power signal outputted from the second power signal output terminal B2 or the third power signal output terminal B3 of the control module 1 is abnormal.
As shown in fig. 4, the driving circuit may be configured to include an indication module 5, an indication signal input terminal G of the indication module 5 is electrically connected to an enable signal output terminal C of the detection module 2, when the power signal inputted from the first power signal input terminal D1 of the detection module 2 is greater than the first setting power signal or the power signal inputted from the second power signal input terminal D2 is greater than the second setting power signal or the power signal inputted from the third power signal input terminal D3 is greater than the third setting power signal, its enable signal output C outputs an enable signal, which may be high, for example, the indication module 5 emits light when the indication signal input G receives the enable signal, it is possible to determine that there is an abnormality in the power signal output from at least one of the first power signal output terminal B1, the second power signal output terminal B2, or the third power signal output terminal B3 of the control module 1. Through the setting of indicating module 5, whether the power signal that control module 1's power signal output terminal B output has unusual phenomena such as sudden change heavy current can be shown more directly perceivedly.
Optionally, as shown in fig. 1 and 4, the driving circuit may further include an interface module 6, and the control module 1 may provide the power signal to the display panel 3 through the interface module 6. Fig. 5 is a schematic diagram of a connection end of an interface module according to an embodiment of the present invention. Referring to fig. 1, 4 and 5, fig. 5 only shows an exemplary specific connection end of the interface module 6 on the side not electrically connected to the display panel 3, and the connection ends of the interface module 6 on the side electrically connected to the display panel 3 are in one-to-one communication with the connection ends (fig. 5 marks the connection ends of the interface module 6 on the leads electrically connected to the pins of the interface module 6). Specifically, the first power signal output terminal B1 of the control module 1 is electrically connected to the signal input terminal VSP of the interface module 6, the second power signal output terminal B2 of the control module 1 is electrically connected to the signal input terminal ELVDD of the interface module 6, and the third power signal output terminal B3 of the control module 1 is electrically connected to the signal input terminal ELVSS of the interface module 6, so as to electrically connect to the display panel 3 through the interface module 6.
Illustratively, as shown in fig. 5, the connection terminal VPP of the Interface module 6 is used to provide a power supply signal to an initialization code storage module of a driver module in a display panel, the connection terminal VDD is used to provide a power supply signal to an analog circuit in a driver module in a display panel, the connection terminal VDDIO is used to provide a power supply signal to a signal input/output Interface in a display panel, the connection terminal RESET is used to perform a RESET process on the driver module in the display panel, the connection terminals D0 to D3 (i.e., the connection terminals D0N, D0P, D1N, D1P, D2N, D2P, D3N and D3P in fig. 5) are used to output MIPI (Mobile Industry Processor Interface) data signals to the display panel, and the connection terminals CP and CN are used to provide a clock signal for controlling MIPI data signals to the display panel.
Optionally, as shown in fig. 1 and fig. 4, the driving circuit may further include an external power module 7, the external power module 7 includes an external power signal output terminal H, the control module 1 includes an external power signal input terminal J, the external power signal output terminal H is electrically connected to the external power signal input terminal J, and the external power module 7 is configured to provide a power signal to the control module 1 to supply the control module 1 with the power signal for operation.
On the basis of the above embodiments, fig. 6 is a schematic diagram of a connection end of a control module according to an embodiment of the present invention. Referring to fig. 1, 4 and 6, the connection terminal VSP ' serves as the first power signal output terminal B1 of the control module 1, the connection terminal ELVDD ' serves as the second power signal output terminal B2 of the control module 1, the connection terminal ELVSS ' serves as the third power signal output terminal B3 of the control module 1, the connection terminal OLED _ EN ' serves as the first enable signal input terminal a1 of the control module 1, and the connection terminal SWIRE ' serves as the second enable signal input terminal a2 of the control module 1. Illustratively, the connection terminal VSP ', the connection terminal OLED _ EN' and the connection terminal ELVDD 'may be electrically connected to the ground terminal GND through the light emitting diode D3, respectively, and the change of the potential at the connection terminal VSP', the connection terminal OLED _ EN 'and the connection terminal ELVDD' may be monitored by the light emitting state of the light emitting diode D3.
Referring to fig. 1, 4 and 6, the control module 1 may include a first capacitive reactance element C6, a second capacitive reactance element C4, a third capacitive reactance element C5 and a voltage stabilizing element D2. One end of the first capacitive reactance element C6 is electrically connected with the first power signal output end B1, the other end is electrically connected with the ground wire, one end of the second capacitive reactance element C4 is electrically connected with the second power signal output end B2, the other end is electrically connected with the ground wire, one end of the third capacitive reactance element C5 is electrically connected with the third power signal output end B3 and the first end of the voltage stabilizing element D2, and the other end is electrically connected with the second end of the voltage stabilizing element D2. The first capacitive reactance element C6 can make the first power signal output terminal B1 of the control module 1, i.e., the power signal output by the connection terminal VSP ', more stable, the second capacitive reactance element C4 can make the second power signal output terminal B2 of the control module 1, i.e., the power signal output by the connection terminal ELVDD', more stable, the third capacitive reactance element C5 can make the third power signal output terminal B3 of the control module 1, i.e., the power signal output by the connection terminal ELVSS ', more stable, the voltage stabilizing element D2 can ensure that the level value of the third power signal output terminal B3, i.e., the power signal output by the connection terminal ELVSS', does not change suddenly, and the voltage stabilizing element D2 can be, for example, a voltage stabilizing diode.
The embodiment of the invention arranges the detection module in the drive circuit of the display panel, the enable signal output end of the detection module is electrically connected with the enable signal input end of the control module, the power supply signal input end of the detection module is electrically connected with the power supply signal output end of the control module, the detection module is arranged to output the enable signal to the enable signal input end of the control module through the enable signal output end when the power supply signal input by the power supply signal input end is greater than the set power supply signal, the control module can control the power supply signal output end to stop outputting the power supply signal to the display panel according to the enable signal input by the enable signal input end, namely, the output of the power supply signal from the control module to the display panel is stopped when the power supply signal from the control module to the display panel is abnormal, so that the problem that the control module or the display panel is damaged due to the abnormal power supply signal from the control module is effectively solved.
Embodiments of the present invention further provide a display panel, where the display panel includes the driving circuit of the display panel in the above embodiments, and therefore the display panel provided in the embodiments of the present invention also has the beneficial effects described in the above embodiments, and details are not repeated herein. The display panel may be an organic light emitting display panel, and the display device integrated with the display panel in the embodiment of the present invention may be an electronic display device such as a mobile phone, a computer, or a television.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments illustrated herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (9)
1. A driving circuit of a display panel, comprising:
the control module comprises an enabling signal input end and a power supply signal output end, and is used for providing a power supply signal for the display panel;
the detection module comprises an enable signal output end and a power signal input end, the enable signal output end is electrically connected with the enable signal input end, and the power signal output end is electrically connected with the power signal input end;
the detection module is used for outputting an enable signal to the enable signal input end through the enable signal output end when a power signal input by the power signal input end is greater than a set power signal, and the control module is used for controlling the power signal output end to stop outputting the power signal according to the enable signal input by the enable signal input end;
the enable signal input end comprises a first enable signal input end and a second enable signal input end, and the power signal output end comprises a first power signal output end, a second power signal output end and a third power signal output end; the power supply signal input ends comprise a first power supply signal input end, a second power supply signal input end and a third power supply signal input end, and the first power supply signal output end to the third power supply signal output end are respectively and correspondingly and electrically connected with the first power supply signal input end to the third power supply signal input end;
the display panel comprises a driving module and a pixel driving module; the driving module comprises a driving power supply signal input end;
the pixel driving module comprises a first pixel power supply signal input end and a second pixel power supply signal input end;
the control module is used for controlling the first power supply signal output end to stop outputting the power supply signal according to the enable signal input by the first enable signal input end, and the driving power supply signal input end is electrically connected with the first power supply signal output end; the control module is used for controlling the second power supply signal output end and the third power supply signal output end to stop outputting power supply signals according to the enable signal input by the second enable signal input end, the first pixel power supply signal input end is electrically connected with the second power supply signal output end, and the second pixel unit signal output end is electrically connected with the third power supply signal output end.
2. The driving circuit according to claim 1, wherein the display panel further comprises:
the driving module further comprises a first driving signal output end and a second driving signal output end, the first driving signal output end is electrically connected with the gate driving circuit, the second driving signal output end is electrically connected with the source driving circuit, the driving module is used for controlling the first driving signal output end to output a signal to the gate driving circuit according to a power signal input by the driving power signal input end, and the driving module is used for controlling the second driving signal output end to output a signal to the source driving circuit according to a power signal input by the driving power signal input end;
the pixel driving module is used for driving the display panel to display according to the power supply signals input by the first pixel power supply signal input end and the second pixel power supply signal input end.
3. The driving circuit of claim 1, wherein the enable signal output comprises a first enable signal output and a second enable signal output, the first enable signal output being electrically connected to the first enable signal input, the second enable signal output being electrically connected to the second enable signal input;
the detection module is used for outputting an enabling signal to the first enabling signal input end through the first enabling signal output end when a power signal input by the first power signal input end is larger than a first set power signal, and the detection module is used for controlling the second enabling signal output end to output the enabling signal to the second enabling signal input end when a power signal input by the second power signal input end is larger than a second set power signal or a power signal input by the third power signal input end is larger than a third set power signal.
4. The driving circuit according to claim 1, further comprising:
the signal conversion module is electrically connected with the enable signal input end through the enable signal output end and comprises a signal input end, a third enable signal output end and a fourth enable signal output end, the signal input end is electrically connected with the enable signal output end, the third enable signal output end is electrically connected with the first enable signal input end, and the fourth enable signal output end is electrically connected with the second enable signal input end;
the detection module is used for controlling the enable signal output end to output an enable signal to the signal input end when a power signal input by the first power signal input end is greater than a first set power signal or a power signal input by the second power signal input end is greater than a second set power signal or a power signal input by the third power signal input end is greater than a third set power signal;
the signal conversion module is used for controlling the third enable signal output end to output an enable signal to the first enable signal input end according to the enable signal input by the signal input end so as to control the first power signal output end to stop outputting the power signal, and the signal conversion module is used for controlling the fourth enable signal output end to output an enable signal to the second enable signal input end according to the enable signal input by the signal input end so as to control the second power signal output end and the third power signal output end to stop outputting the power signal.
5. The driving circuit according to claim 1, further comprising:
the indicating module comprises an indicating signal input end, the indicating signal input end is electrically connected with the enabling signal output end, and the indicating module is used for emitting light when the enabling signal is input by the indicating signal input end.
6. The drive circuit according to claim 3 or 4, characterized by further comprising:
and the control module is used for providing a power supply signal for the display panel through the interface module.
7. The driving circuit according to claim 1, further comprising:
the external power supply module comprises an external power supply signal output end, the control module comprises an external power supply signal input end, and the external power supply signal output end is electrically connected with the external power supply signal input end.
8. The driving circuit according to claim 1, wherein the control module further comprises a first capacitive reactance element, a second capacitive reactance element, a third capacitive reactance element, and a voltage stabilizing element;
one end of the first capacitive reactance element is electrically connected with the first power signal output end, and the other end of the first capacitive reactance element is electrically connected with a ground wire; one end of the second capacitive reactance element is electrically connected with the second power signal output end, and the other end of the second capacitive reactance element is electrically connected with a ground wire; one end of the third capacitive reactance element is electrically connected with the third power signal output end and the first end of the voltage stabilizing element, and the other end of the third capacitive reactance element is electrically connected with the ground wire and the second end of the voltage stabilizing element.
9. A display panel comprising the driving circuit of the display panel according to any one of claims 1 to 8.
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| CN201711382384.8A CN109949742B (en) | 2017-12-20 | 2017-12-20 | Display panel's drive circuit and display panel |
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| CN110429577B (en) * | 2019-08-16 | 2021-08-24 | 迈普通信技术股份有限公司 | Misplug-proof power supply, misplug-proof load and misplug-proof system of pluggable power supply |
| CN110890052B (en) * | 2019-11-29 | 2021-02-02 | Tcl华星光电技术有限公司 | Driving circuit, driving method and display device |
| CN111681606B (en) * | 2020-07-22 | 2021-11-19 | 宁波视睿迪光电有限公司 | Protection control power supply, OLED screen control system and OLED screen |
| CN114495821B (en) * | 2021-11-19 | 2023-08-01 | 京东方科技集团股份有限公司 | Display panel and display device |
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| KR101696749B1 (en) * | 2010-01-25 | 2017-01-17 | 삼성디스플레이 주식회사 | Backlight assembly and display apparatus having the same |
| CN105162077A (en) * | 2015-10-13 | 2015-12-16 | 深圳市华星光电技术有限公司 | Line protection circuit and LCD |
| CN105304047B (en) * | 2015-11-19 | 2018-07-03 | 深圳市华星光电技术有限公司 | Protect circuit and the liquid crystal display with the protection circuit |
| CN105304050B (en) * | 2015-11-20 | 2017-07-25 | 深圳市华星光电技术有限公司 | A kind of current foldback circuit and over-current protection method |
| CN107015494B (en) * | 2016-01-27 | 2020-10-16 | 上海和辉光电有限公司 | Multi-path voltage source circuit |
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Address after: 1568 Jiugong Road, Jinshan District, Shanghai, 201506 Applicant after: Shanghai Hehui optoelectronic Co., Ltd Address before: 1568 Jiugong Road, Jinshan District, Shanghai, 201506 Applicant before: EverDisplay Optronics (Shanghai) Ltd. |
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