CN106548761B - A kind of display control circuit of display panel, display control method and relevant apparatus - Google Patents
A kind of display control circuit of display panel, display control method and relevant apparatus Download PDFInfo
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- CN106548761B CN106548761B CN201710036310.2A CN201710036310A CN106548761B CN 106548761 B CN106548761 B CN 106548761B CN 201710036310 A CN201710036310 A CN 201710036310A CN 106548761 B CN106548761 B CN 106548761B
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—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 by control of light from an independent source
- G09G3/36—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 by control of light from an independent source using liquid crystals
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Abstract
The invention discloses a kind of display control circuit of display panel, display panel, its display control method and display device, which includes: control module, restarts module and switching module.When the picture signal that front end system mainboard is sent occurs abnormal; switching module inputs switching signal to sequential control circuit under the control of the output end of control module; realize the display pattern for automatically switching sequential control circuit; display panel is set to enter still picture display pattern, to avoid showing abnormal picture；When the picture signal that front end system mainboard is sent restores normal, module is restarted then under the control of the output end of control module, Restart Signal is inputted to sequential control circuit, so that sequential control circuit carries out reboot operation, eliminates the influence that abnormal image signal shows picture to display panel.The corresponding abnormal show picture of abnormal image signal that front end system is sent can be passively shown to avoid display panel in this way, effectively promotes the ornamental experience of user.
Description
Technical Field
The present invention relates to the field of display technologies, and in particular, to a display control circuit of a display panel, a display control method thereof, and a display device.
Background
As is well known, the lcd has many advantages that the power consumption is low, the size is small, the weight is light, the screen is ultra-thin, and the like, which are not comparable to other displays, and in recent years, the lcd is widely applied to smart instruments, meters and low-power electronic products controlled by a single chip microcomputer.
However, in the application process of the liquid crystal display screen in the DP and EDP protocol interface products, the system motherboard signals are abnormal under some special conditions, thereby causing the liquid crystal display screen to display abnormal pictures. The reason is that the liquid crystal display screen can only passively receive and display the image signal sent by the front end system in the application of the whole machine, and if the image signal sent by the front end system is abnormal, the liquid crystal display screen cannot judge that the image signal is an abnormal signal and still can truly display the picture content corresponding to the abnormal signal, so that the display picture corresponding to the abnormal image signal sent by the front end system is displayed, a user can view the abnormal display picture, and the viewing experience of the user is influenced.
Therefore, it is an urgent technical problem to be solved by those skilled in the art how to improve the problem that the display panel displays an abnormal picture due to an abnormal front-end system signal, thereby improving the user experience.
Disclosure of Invention
The embodiment of the invention provides a display control circuit of a display panel, the display panel, a display control method and a display device thereof, which are used for solving the problem that the display panel displays abnormal pictures due to the abnormity of a front-end system signal in the prior art.
An embodiment of the present invention provides a display control circuit of a display panel, including: the system comprises a control module, a restart module and a switching module; wherein,
the control end of the control module is used for inputting a feedback signal of a sequential control circuit in the display panel, the first input end is connected with the first reference signal end, the second input end is connected with the second reference signal end, and the output end is connected with the control end of the switching module;
a first input end of the switching module is connected with the first reference signal end, a second input end of the switching module is connected with the second reference signal end, and an output end of the switching module is used for inputting a switching signal to the sequential control circuit and is connected with a control end of the restarting module;
a first input end of the restart module is used for inputting the feedback signal, a second input end of the restart module is connected with the second reference signal end, and an output end of the restart module is connected with a reset end of the time sequence control circuit;
when the signal sent by the front-end system is abnormal, the control module is used for conducting the first reference signal end and the control end of the switching module under the control of the feedback signal; the switching module is used for inputting a switching signal to the sequential control circuit under the control of the output end of the control module; when the time sequence control circuit receives the switching signal, the display panel is controlled to be switched to a static picture display mode;
when the signal sent by the front-end system returns to normal, the restart module is used for inputting a reset signal to the reset end of the time sequence control circuit under the control of the output end of the switching module; and the time sequence control circuit performs restarting operation when receiving the reset signal.
In a possible implementation manner, in the display control circuit provided in an embodiment of the present invention, the control module includes: a first switch transistor, a first resistor and a second resistor; wherein,
the grid electrode of the first switch transistor is connected with one end of the first resistor, the source electrode of the first switch transistor is connected with the first reference signal end, and the drain electrode of the first switch transistor is respectively connected with one end of the second resistor and the control end of the switching module;
the other end of the first resistor is used for inputting the feedback signal;
the other end of the second resistor is connected with the second reference signal end.
In a possible implementation manner, in the display control circuit provided by an embodiment of the present invention, the first switch transistor is an N-type transistor.
In a possible implementation manner, in the display control circuit provided in an embodiment of the present invention, the switching module includes: a second switching transistor and a third resistor; wherein,
the grid electrode of the second switch transistor is connected with the output end of the control module, the source electrode of the second switch transistor is connected with the first reference signal end, and the drain electrode of the second switch transistor is respectively connected with one end of the third resistor and the control end of the restarting module and is used for inputting a switching signal to the sequential control circuit;
the other end of the third resistor is connected with the second reference signal end.
In a possible implementation manner, in the display control circuit provided by the embodiment of the present invention, the second switching transistor is an N-type transistor.
In a possible implementation manner, in the display control circuit provided in an embodiment of the present invention, the restart module includes: a third switching transistor and a fourth resistor; wherein,
the grid electrode of the third switching transistor is connected with the output end of the switching module, the source electrode of the third switching transistor is used for inputting the feedback signal, and the drain electrode of the third switching transistor is respectively connected with one end of the fourth resistor and the reset end of the time sequence control circuit;
the other end of the fourth resistor is connected with the second reference signal end.
In a possible implementation manner, in the display control circuit provided by the embodiment of the present invention, the third switching transistor is an N-type transistor.
The embodiment of the invention provides a display panel, which comprises the display control circuit provided by the embodiment of the invention.
The embodiment of the invention provides a display device which comprises the display panel provided by the embodiment of the invention.
The embodiment of the present invention provides a display control method for the display panel provided in the embodiment of the present invention, including:
when the signal sent by the front-end system is abnormal, the control module conducts the first reference signal end and the control end of the switching module under the control of the feedback signal; the switching module inputs a switching signal to the sequential control circuit under the control of the output end of the control module; when the time sequence control circuit receives the switching signal, the display panel is controlled to be switched to a static picture display mode;
when the signal sent by the front-end system returns to normal, the restart module inputs a reset signal to the reset end of the time sequence control circuit under the control of the output end of the switching module; and the time sequence control circuit performs restarting operation when receiving the reset signal.
The embodiment of the invention has the beneficial effects that:
the embodiment of the invention provides a display control circuit of a display panel, the display panel, a display control method and a display device thereof, wherein the display control circuit comprises: the system comprises a control module, a restart module and a switching module; the control end of the control module is used for inputting a feedback signal of a time sequence control circuit in the display panel, the first input end is connected with the first reference signal end, the second input end is connected with the second reference signal end, and the output end is connected with the control end of the switching module; the first input end of the switching module is connected with the first reference signal end, the second input end of the switching module is connected with the second reference signal end, and the output end of the switching module is used for inputting a switching signal to the sequential control circuit and is connected with the control end of the restarting module; the first input end of the restarting module is used for inputting the feedback signal, the second input end of the restarting module is connected with the second reference signal end, and the output end of the restarting module is connected with the resetting end of the time sequence control circuit.
Specifically, the display control circuit provided in the embodiment of the present invention may include a control module, a restart module, and a switching module. When an image signal sent by a front-end system mainboard is abnormal, the control module can conduct the first reference signal end and the control end of the switching module under the control of a feedback signal, and then the switching module inputs a switching signal to the time sequence control circuit under the control of the output end of the control module, so that the display mode of the time sequence control circuit Tcon is automatically switched, the display panel enters a static picture display mode, a display picture of a previous frame is displayed, and the abnormal picture is prevented from being displayed; when the image signal sent by the front-end system mainboard returns to normal, the restart module inputs a restart signal to the reset terminal of the time sequence control circuit Tcon under the control of the output terminal of the switching module, so that the time sequence control circuit Tcon performs restart operation, and the influence of the abnormal image signal on the display picture of the display panel is eliminated. Therefore, the display panel can be prevented from passively displaying the abnormal display picture corresponding to the abnormal image signal sent by the front-end system, and the viewing experience of a user is effectively improved.
Drawings
Fig. 1 is a schematic structural diagram of a display control circuit according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a display control circuit according to an embodiment of the present invention;
fig. 3a and fig. 3b are schematic diagrams illustrating actual measurement of a feedback signal of a display product when a signal of a motherboard is abnormal according to an embodiment of the present invention;
fig. 4 is a schematic diagram of a chip structure of a timing control circuit according to an embodiment of the present invention;
FIG. 5 is a timing diagram illustrating operation of a display control circuit according to an embodiment of the present invention;
FIG. 6 is a schematic diagram of a simulation circuit according to an embodiment of the present invention;
fig. 7 is a simulation timing diagram of a simulation circuit according to an embodiment of the present invention.
Detailed Description
The following describes in detail specific embodiments of the display control circuit of the display panel, the display control method thereof, and the display device according to the embodiments of the present invention with reference to the accompanying drawings.
An embodiment of the present invention provides a display control circuit of a display panel, as shown in fig. 1, which may include: the device comprises a control module 01, a switching module 02 and a restarting module 03; wherein,
the control end of the control module 01 is used for inputting a feedback signal FS of a time sequence control circuit in the display panel, the first input end is connected with a first reference signal end Vref1, the second input end is connected with a second reference signal end Vref2, and the output end is connected with the control end of the switching module 02;
a first input end of the switching module 02 is connected with a first reference signal end Vref1, a second input end is connected with a second reference signal end Vref2, and an output end Bist is used for inputting a switching signal to the sequential control circuit and is connected with a control end of the restarting module 03;
a first input end of the restart module 03 is used for inputting a feedback signal FS, a second input end is connected with a second reference signal terminal Vref2, and an output end is connected with a Reset terminal Reset of the timing control circuit;
when the signal sent by the front-end system is abnormal, the control module 01 is used for conducting the first reference signal terminal Vref1 and the control terminal of the switching module 02 under the control of the feedback signal FS; the switching module 02 is used for inputting a switching signal to the sequential control circuit under the control of the output end of the control module 01; when the time sequence control circuit receives the switching signal, the display panel is controlled to be switched to a static picture display mode;
when the signal sent by the front-end system returns to normal, the restart module 03 is configured to input a Reset signal to the Reset terminal Reset of the timing control circuit under the control of the output terminal of the switching module 02; and the time sequence control circuit performs restarting operation when receiving the reset signal.
The display control circuit provided by the embodiment of the invention can comprise a control module, a restarting module and a switching module. When an image signal sent by a front-end system mainboard is abnormal, the control module can conduct the first reference signal end and the control end of the switching module under the control of a feedback signal, and then the switching module inputs a switching signal to the time sequence control circuit under the control of the output end of the control module, so that the display mode of the time sequence control circuit Tcon is automatically switched, the display panel enters a static picture display mode, a display picture of a previous frame is displayed, and the abnormal picture is prevented from being displayed; when the image signal sent by the front-end system mainboard returns to normal, the restart module inputs a restart signal to the reset terminal of the time sequence control circuit Tcon under the control of the output terminal of the switching module, so that the time sequence control circuit Tcon performs restart operation, and the influence of the abnormal image signal on the display picture of the display panel is eliminated. Therefore, the display panel can be prevented from passively displaying the abnormal display picture corresponding to the abnormal image signal sent by the front-end system, and the viewing experience of a user is effectively improved.
In a specific implementation, as shown in fig. 2, in the display control circuit provided in the embodiment of the present invention, the control module 01 may include: a first switching transistor T1, a first resistor R1, and a second resistor R2; the gate of the first switching transistor T1 is connected to one end of the first resistor R1, the source is connected to the first reference signal terminal Vref1, and the drain is connected to one end of the second resistor R2 and the control terminal of the switching module 02, respectively; the other end of the first resistor R1 is used for inputting a feedback signal FS; the other end of the second resistor R2 is connected to a second reference signal terminal Vref 2.
Specifically, the timing control circuit in the display panel can reversely detect and judge whether the front end signal is an abnormal signal through the DP and EDP protocols, and output a corresponding feedback signal when the signal sent by the front end system is abnormal, and under a normal condition, the DP signal sent by the main board system should be a continuous pulse signal with consistent frequency; when the DP signal sent by the motherboard system is abnormal, i.e. the DP signal is discontinuous as shown in fig. 3a, or the DP signal is changed in frequency as shown in fig. 3b, the timing control circuit detects that the front-end system signal is abnormal, and the output feedback signal FS changes from low level to high level. In the display control circuit provided in the embodiment of the present invention, the first switch transistor may be an N-type transistor, and when an image signal sent by the front-end system is abnormal, the first switch transistor may be turned on under the control of the feedback signal, and the turned-on first switch transistor may output a signal of the first reference signal terminal to the control terminal of the switching module.
In a specific implementation, as shown in fig. 2, in the display control circuit provided in the embodiment of the present invention, the switching module 02 may include: a second switching transistor T2 and a third resistor R3; the gate of the second switching transistor T2 is connected to the output terminal of the control module 01, the source is connected to the first reference signal terminal Vref1, and the drain is connected to one end of the third resistor R3 and the control terminal of the restart module 03, respectively, and is configured to input a switching signal to the timing control circuit; the other end of the third resistor R3 is connected to a second reference signal terminal Vref 2. Specifically, in the display control circuit provided in the embodiment of the present invention, the second switch transistor may be an N-type transistor. The second switching transistor can be turned on under the control of the output end of the control module, namely when the first switching transistor is turned off, the second switching transistor is turned on, and the turned-on second switching transistor can output a signal of the first reference signal end to the control end of the restarting module; when the first switching transistor is turned on, the second switching transistor is turned off, and when the second switching transistor is turned off, the signal of the second reference signal terminal is output to the timing control circuit as a switching signal through the output terminal Bist, and then the timing control circuit controls the display panel to enter a still picture display mode when receiving the switching signal.
In a specific implementation, in the display control circuit provided in the embodiment of the present invention, as shown in fig. 2, the restart module 03 may include: a third switching transistor T3 and a fourth resistor R4; the gate of the third switching transistor T3 is connected to the output terminal of the switching module 02, the source is used for inputting the feedback signal FS, and the drain is connected to one end of the fourth resistor R4 and the Reset terminal Reset of the timing control circuit, respectively; the other end of the fourth resistor R4 is connected to a second reference signal terminal Vref 2. Specifically, in the display control circuit provided in the embodiment of the present invention, the third switching transistor may be an N-type transistor. The third switching transistor can be conducted under the control of the output end of the switching module, and the conducted third switching transistor can output the feedback signal to the time sequence control circuit as a reset signal, so that the time sequence control circuit carries out restarting operation when receiving the reset signal.
It should be noted that the switching Transistor mentioned in the above embodiments of the present invention may be a Thin Film Transistor (TFT) or a Metal oxide semiconductor field effect Transistor (MOS), and is not limited herein. In specific implementations, the sources and drains of these transistors may be interchanged without specific distinction. A thin film transistor will be described as an example in describing specific embodiments. The signal connected to the first reference signal terminal Vref1 is a ground level signal GND, and the signal connected to the second reference signal terminal Vref2 is a high level signal VDD. In addition, the timing control circuit of the display panel applied to products of DP and EDP interfaces is integrated in a timing control chip TCON IC, and the chip has a plurality of open pins (GPIO) which can be used as feedback signal output pins for detecting the result of the DP signal at the front end. As shown in fig. 4, floating GPIO4 can be used as an output pin of the feedback signal FS, and the connection and functions of the remaining pins on the chip are the same as those of the prior art, and will not be described in detail herein.
The following describes in detail the operation of the display control circuit provided in the embodiment of the present invention with reference to the structure of the display control circuit provided in the embodiment of the present invention as shown in fig. 2 and the operation timing of the display control circuit as shown in fig. 5. In the following description, a high level signal is denoted by 1, a low level signal is denoted by 0, and the first to third switching transistors are N-type transistors.
In a normal condition, that is, when the image signal sent by the front-end system is normal, the feedback signal FS output by the timing control circuit is a low-level signal, that is, FS is 0, so that the first switching transistor T1 is turned off; the gate S1 of the second switching transistor T2 is connected to the signal VDD of the second reference signal terminal Vref2, and the second switching transistor T2 is turned on because VDD is equal to 1; the turned-on second switching transistor T2 outputs the signal GND of the first reference signal terminal Vref1 to the output terminal Bist and the gate of the third switching transistor T3, and since GND is 0, the third switching transistor T3 is turned off. In addition, when the timing control circuit works, the signal of the Reset terminal Reset is in a high level, and if the signal of the Reset terminal Reset is pulled low, the timing control circuit is restarted. When the image signal sent by the front-end system is normal, the third switching transistor T3 is turned off, the Reset terminal Reset is connected to the signal VDD of the second reference signal terminal Vref2, and no external signal acts on the Reset terminal Reset of the timing control circuit because VDD is 1, so that the timing control circuit does not perform a restart operation. In addition, since the output terminal Bist outputs the signal GND of the first reference signal terminal Vref1, the switching signal input to the timing control circuit is at a low level, and the display panel maintains the current display mode and does not enter the still picture display mode.
In an abnormal situation, that is, when the image signal transmitted by the front-end system is abnormal, the feedback signal FS output by the timing control circuit becomes a high-level signal, that is, FS is 1, so that the first switching transistor T1 is turned on; the turned-on first switching transistor T1 outputs the signal GND of the first reference signal terminal Vref1 to the gate S1 of the second switching transistor T2, and since GND is 0, the second switching transistor T2 is turned off; at this time, the output terminal Bist and the gate of the third switching transistor T3 are connected to the signal VDD of the second reference signal terminal Vref2, and since VDD is 1, the switching signal input to the timing control circuit through the output terminal Bist is a high level signal, and the timing control circuit controls the display panel to enter a still picture display mode, so as to display the display picture of the previous frame and avoid displaying an abnormal picture; since the gate of the third switching transistor T3 is connected to the signal VDD of the second reference signal terminal Vref2, the third switching transistor is turned on, the turned-on third switching transistor T3 outputs the feedback signal FS to the Reset terminal Reset of the timing control circuit, and since FS is equal to 1 at this time, the signal input to the Reset terminal Reset of the timing control circuit is a high level signal, and the timing control circuit does not perform a restart operation.
When the abnormality is over, that is, when the image signal sent by the front-end system returns to normal, the feedback signal FS becomes low, but due to the delay effect of the switching transistors, when the feedback signal FS changes from high to low, the first switching transistor T1 slowly enters the off state, the potential of the gate S1 of the second switching transistor T2 does not immediately rise to VDD, the second switching transistor T2 is still turned off for a short time, at this time, the third switching transistor T3 is still in the on state, the turned-on third switching transistor T3 outputs the feedback signal FS to the Reset terminal Reset of the timing control circuit, and since FS is 0 at this time, the timing control circuit performs a restart operation. Subsequently, the first switching transistor T1 is completely turned off under the control of the feedback signal FS, the gate potential of the second switching transistor T2 is also pulled high and turned on, and further, the potentials of the output terminal Bist and the gate of the third switching transistor T3 are pulled low, and the signal of the Reset terminal Reset of the timing control circuit is pulled high again; and the switching signal input to the time sequence control circuit through the output end Bist is also changed into a low level signal, the time sequence control circuit controls the display panel to exit from the static picture display mode, the time sequence control circuit finishes the restarting operation, and the display panel restores to the normal display mode.
In addition, the display control circuit provided by the embodiment of the present invention may perform a simulation experiment through the built simulation circuit, where a connection relationship between each device in the specific simulation circuit is shown in fig. 6, and a connection relationship between each device is shown in fig. 6, and therefore, details are not described here. The simulation circuit can realize the function of the display control circuit provided by the embodiment of the invention, the simulation result is shown in fig. 7, and comparing fig. 5 and fig. 7, it can be seen that the simulation result of the simulation circuit is consistent with the working timing sequence of the display control circuit provided by the embodiment of the invention, so that the display control circuit provided by the embodiment of the invention can realize automatic switching of the display mode of the display panel when the signal of the front-end system is abnormal, and the display panel is prevented from displaying abnormal pictures due to the signal abnormality of the front-end system.
Based on the same inventive concept, an embodiment of the present invention provides a display panel, including the display control circuit provided in the embodiment of the present invention. The display panel can be applied to any product or component with a display function, such as a mobile phone, a tablet personal computer, a television, a display, a notebook computer, a digital photo frame, a navigator and the like. Because the principle of the display panel for solving the problems is similar to that of the display control circuit, the implementation of the display panel can refer to the implementation of the display control circuit, and repeated details are not repeated.
Based on the same inventive concept, an embodiment of the present invention provides a display device, including the display panel provided in the embodiment of the present invention. Since the principle of the display device to solve the problem is similar to that of the display panel, the display device can be implemented by the display panel, and repeated descriptions are omitted.
Based on the same inventive concept, an embodiment of the present invention provides a display control method for the display panel, including:
when the signal sent by the front-end system is abnormal, the control module conducts the first reference signal end and the control end of the switching module under the control of the feedback signal; the switching module inputs a switching signal to the time sequence control circuit under the control of the output end of the control module; when the time sequence control circuit receives the switching signal, the display panel is controlled to be switched to a static picture display mode;
when the signal sent by the front-end system is received and returns to normal, the restarting module inputs a reset signal to the reset end of the time sequence control circuit under the control of the output end of the switching module; and the time sequence control circuit performs restarting operation when receiving the reset signal.
In the display control method provided by the embodiment of the invention, when an image signal sent by a front-end system mainboard is abnormal, the control module can conduct the first reference signal terminal and the control terminal of the switching module under the control of the feedback signal, and then the switching module inputs a switching signal to the time sequence control circuit under the control of the output terminal of the control module, so that the display mode of the time sequence control circuit Tcon is automatically switched, the display panel enters a static picture display mode, a display picture of a previous frame is displayed, and the abnormal picture is prevented from being displayed; when the image signal sent by the front-end system mainboard returns to normal, the restart module inputs a restart signal to the time sequence control circuit Tcon under the control of the output end of the switching module, so that the time sequence control circuit Tcon carries out restart operation, and the influence of the abnormal image signal on the display picture of the display panel is eliminated. Therefore, the display panel can be prevented from passively displaying the abnormal display picture corresponding to the abnormal image signal sent by the front-end system, and the viewing experience of a user is effectively improved.
The embodiment of the invention provides a display control circuit of a display panel, the display panel, a display control method and a display device thereof, wherein the display control circuit comprises: the system comprises a control module, a restart module and a switching module; the control end of the control module is used for inputting a feedback signal of a time sequence control circuit in the display panel, the first input end is connected with the first reference signal end, the second input end is connected with the second reference signal end, and the output end is connected with the control end of the switching module; the first input end of the switching module is connected with the first reference signal end, the second input end of the switching module is connected with the second reference signal end, and the output end of the switching module is used for inputting a switching signal to the sequential control circuit and is connected with the control end of the restarting module; the first input end of the restarting module is used for inputting the feedback signal, the second input end of the restarting module is connected with the second reference signal end, and the output end of the restarting module is connected with the resetting end of the time sequence control circuit.
Specifically, the display control circuit provided in the embodiment of the present invention may include a control module, a restart module, and a switching module. When an image signal sent by a front-end system mainboard is abnormal, the control module can conduct the first reference signal end and the control end of the switching module under the control of a feedback signal, and then the switching module inputs a switching signal to the time sequence control circuit under the control of the output end of the control module, so that the display mode of the time sequence control circuit Tcon is automatically switched, the display panel enters a static picture display mode, a display picture of a previous frame is displayed, and the abnormal picture is prevented from being displayed; when the image signal sent by the front-end system mainboard returns to normal, the restart module inputs a restart signal to the reset terminal of the time sequence control circuit Tcon under the control of the output terminal of the switching module, so that the time sequence control circuit Tcon performs restart operation, and the influence of the abnormal image signal on the display picture of the display panel is eliminated. Therefore, the display panel can be prevented from passively displaying the abnormal display picture corresponding to the abnormal image signal sent by the front-end system, and the viewing experience of a user is effectively improved.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (10)
1. A display control circuit of a display panel, comprising: the system comprises a control module, a restart module and a switching module; wherein,
the control end of the control module is used for inputting a feedback signal of a sequential control circuit in the display panel, the first input end is connected with the first reference signal end, the second input end is connected with the second reference signal end, and the output end is connected with the control end of the switching module;
a first input end of the switching module is connected with the first reference signal end, a second input end of the switching module is connected with the second reference signal end, and an output end of the switching module is used for inputting a switching signal to the sequential control circuit and is connected with a control end of the restarting module;
a first input end of the restart module is used for inputting the feedback signal, a second input end of the restart module is connected with the second reference signal end, and an output end of the restart module is connected with a reset end of the time sequence control circuit;
when the signal sent by the front-end system is abnormal, the control module is used for transmitting the signal of the first reference signal end to the control end of the switching module under the control of the feedback signal; the switching module is used for inputting a switching signal to the sequential control circuit under the control of the output end of the control module; when the time sequence control circuit receives the switching signal, the display panel is controlled to be switched to a static picture display mode;
when the signal sent by the front-end system returns to normal, the restart module is used for inputting a reset signal to the reset end of the time sequence control circuit under the control of the output end of the switching module; and the time sequence control circuit performs restarting operation when receiving the reset signal.
2. The display control circuit of claim 1, wherein the control module comprises: a first switch transistor, a first resistor and a second resistor; wherein,
the grid electrode of the first switch transistor is connected with one end of the first resistor, the source electrode of the first switch transistor is connected with the first reference signal end, and the drain electrode of the first switch transistor is respectively connected with one end of the second resistor and the control end of the switching module;
the other end of the first resistor is used for inputting the feedback signal;
the other end of the second resistor is connected with the second reference signal end.
3. The display control circuit of claim 2, wherein the first switching transistor is an N-type transistor.
4. The display control circuit of claim 1, wherein the switching module comprises: a second switching transistor and a third resistor; wherein,
the grid electrode of the second switch transistor is connected with the output end of the control module, the source electrode of the second switch transistor is connected with the first reference signal end, and the drain electrode of the second switch transistor is respectively connected with one end of the third resistor and the control end of the restarting module and is used for inputting a switching signal to the sequential control circuit;
the other end of the third resistor is connected with the second reference signal end.
5. The display control circuit of claim 4, wherein the second switching transistor is an N-type transistor.
6. The display control circuit of claim 1, wherein the restart module comprises: a third switching transistor and a fourth resistor; wherein,
the grid electrode of the third switching transistor is connected with the output end of the switching module, the source electrode of the third switching transistor is used for inputting the feedback signal, and the drain electrode of the third switching transistor is respectively connected with one end of the fourth resistor and the reset end of the time sequence control circuit;
the other end of the fourth resistor is connected with the second reference signal end.
7. The display control circuit according to claim 6, wherein the third switching transistor is an N-type transistor.
8. A display panel comprising the display control circuit according to any one of claims 1 to 7.
9. A display device characterized by comprising the display panel according to claim 8.
10. A display control method of a display panel according to claim 8, comprising:
when the signal sent by the front-end system is abnormal, the control module transmits the signal of the first reference signal end to the control end of the switching module under the control of the feedback signal; the switching module inputs a switching signal to the sequential control circuit under the control of the output end of the control module; when the time sequence control circuit receives the switching signal, the display panel is controlled to be switched to a static picture display mode;
when the signal sent by the front-end system returns to normal, the restart module inputs a reset signal to the reset end of the time sequence control circuit under the control of the output end of the switching module; and the time sequence control circuit performs restarting operation when receiving the reset signal.
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| CN107170417B (en) * | 2017-06-15 | 2020-06-09 | 青岛海信移动通信技术股份有限公司 | Device for switching from a first chip to a second chip in a terminal |
| CN107240381B (en) * | 2017-07-31 | 2019-11-26 | 京东方科技集团股份有限公司 | A kind of display methods and display device of display device |
| CN108172180B (en) * | 2017-12-18 | 2020-06-05 | 深圳市华星光电技术有限公司 | Driving device of liquid crystal display and resetting method thereof |
| CN108024149B (en) * | 2017-12-18 | 2020-09-04 | 海信视像科技股份有限公司 | Method for transmitting signal to SoC chip by TCON board through single connecting line, TCON board and television |
| CN108196484A (en) * | 2018-01-22 | 2018-06-22 | 珠海格力电器股份有限公司 | Display panel control method, device and system, display panel and equipment unit |
| CN110459188A (en) * | 2019-08-16 | 2019-11-15 | 四川长虹电器股份有限公司 | The processing method of LCD TV TCON timing control signal |
| CN112087623A (en) * | 2020-09-22 | 2020-12-15 | 禹创半导体(深圳)有限公司 | MIPI abnormity display solution method |
| CN113450711B (en) * | 2021-06-25 | 2023-05-16 | 京东方科技集团股份有限公司 | Display device, driving method thereof and driving device |
| CN113593463B (en) * | 2021-07-30 | 2024-05-31 | 福州京东方光电科技有限公司 | Display mode switching system and method and display device |
| CN115273766B (en) * | 2022-07-15 | 2023-08-04 | 惠科股份有限公司 | Energy supply circuit, energy supply assembly and display device |
| CN115188344B (en) * | 2022-07-20 | 2024-05-31 | 深圳创维－Rgb电子有限公司 | Abnormal display detection control circuit, abnormal display detection control method and display |
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| KR20080082075A (en) * | 2007-03-07 | 2008-09-11 | 삼성전자주식회사 | Timing controller, display apparatus comprising the same and method of generating signal for display apparatus |
| JP5118939B2 (en) * | 2007-10-25 | 2013-01-16 | ローム株式会社 | Liquid crystal drive device and liquid crystal display device using the same |
| KR101416883B1 (en) * | 2010-03-17 | 2014-07-08 | 후지쯔 가부시끼가이샤 | Video display system, information processing apparatus, and video display apparatus |
| KR101839328B1 (en) * | 2011-07-14 | 2018-04-27 | 엘지디스플레이 주식회사 | Flat panel display and driving circuit for the same |
| CN103218982B (en) * | 2013-04-12 | 2015-11-04 | 广东欧珀移动通信有限公司 | A kind of display screen operation irregularity disposal route and device |
| JP6569234B2 (en) * | 2015-02-17 | 2019-09-04 | セイコーエプソン株式会社 | Circuit device, electro-optical device and electronic apparatus |
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