CN114242017B - Display panel, driving method thereof and display device - Google Patents
Display panel, driving method thereof and display device Download PDFInfo
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- CN114242017B CN114242017B CN202111589932.0A CN202111589932A CN114242017B CN 114242017 B CN114242017 B CN 114242017B CN 202111589932 A CN202111589932 A CN 202111589932A CN 114242017 B CN114242017 B CN 114242017B
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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
- G09G3/3611—Control of matrices with row and column drivers
- G09G3/3674—Details of drivers for scan electrodes
- G09G3/3677—Details of drivers for scan electrodes suitable for active matrices only
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- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
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- Theoretical Computer Science (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
Abstract
The invention discloses a display panel, a driving method thereof and a display device, wherein the display panel comprises a first driving module; a second driving module; the temperature detection module is used for converting the current ambient temperature signal into an electric signal; and the control module is used for controlling the first driving module and the second driving module to operate simultaneously when judging that the current environmental temperature is smaller than a first preset value according to the electric signal, so that the driving capability is effectively improved, and the temperature rise of the two driving modules during operation can be rapidly increased, and further the problem of panel starting abnormality under a low-temperature environment is effectively solved.
Description
Technical Field
The present disclosure relates to the field of display technologies, and in particular, to a display panel, a driving method thereof, and a display device.
Background
For material, process and design reasons, the electrical characteristics of the GOA (gate driver array) circuit of the liquid crystal panel are greatly affected by ambient temperature, for example, at an ambient temperature lower than 0 °, the GOA voltage of the panel may not be sufficient to fully turn on a row of TFTs (thin film transistors), thereby causing the liquid crystal panel to fail to start.
Disclosure of Invention
The invention aims to provide a display panel, a driving method thereof and a display device, which can effectively solve the problem that the panel cannot be started in a low-temperature state.
In order to achieve the above purpose, the invention adopts the following technical scheme:
the embodiment of the application provides a display panel, which comprises
A first driving module;
a second driving module;
the temperature detection module is used for converting the current ambient temperature signal into an electric signal;
and the control module is used for controlling the first driving module and the second driving module to operate simultaneously when the current environmental temperature is judged to be smaller than the first preset value according to the electric signal.
In some embodiments, the control module in the display panel is further configured to control the first driving module or the second driving module to operate when the current ambient temperature is determined to be greater than the second preset value according to the electrical signal; wherein the second preset value is greater than the first preset value.
In some embodiments, the control module in the display panel includes:
the control unit is used for outputting a first control signal when the current environment temperature is judged to be smaller than a first preset value according to the electric signal;
the switching unit is used for outputting a first switching signal to the first driving module and outputting a second switching signal to the second driving module, and setting the first switching signal and the second switching signal to be a first working time sequence according to the first control signal.
In some embodiments, the control module in the display panel includes:
the control unit is also used for outputting a second control signal when judging that the current ambient temperature is greater than a second preset value according to the electric signal;
the switching unit is further used for outputting a first switching signal to the first driving module and outputting a second switching signal to the second driving module, and setting the first switching signal and the second switching signal to be a second working time sequence according to the second control signal.
In some embodiments, the temperature detection module in the display panel includes a temperature sensor for converting the current ambient temperature into a voltage signal for output to the control unit.
In some embodiments, the control unit in the display panel includes an analog-to-digital conversion port for sampling the voltage signal.
In some embodiments, the display panel includes a display area and a non-display area, and the first driving module and the second driving module are respectively located at opposite sides of the display area.
The embodiment of the application also provides a driving method of the display panel, which is used for driving the display panel; the driving method comprises the following steps:
detecting the current environmental temperature and judging whether the current environmental temperature is smaller than a first preset value or not;
if yes, the first driving module and the second driving module are controlled to run simultaneously.
In some embodiments, the driving method of the display panel further includes the steps of:
judging whether the current ambient temperature is greater than a second preset value;
if yes, controlling the first driving module or the second driving module to operate; wherein the second preset value is greater than the first preset value.
The embodiment of the application also provides a display device comprising the display panel.
Compared with the prior art, the invention provides the display panel, the driving method thereof and the display device, and the driving capability of opening the thin film transistors is improved by controlling the first driving module and the second driving module to operate simultaneously when the current ambient temperature is smaller than the first preset value, and the GOA voltage at two ends of each row of thin film transistors in the display area is driven to be opened and closed, and the temperature rise of the two driving modules during operation simultaneously can be quickly increased, so that the problem of abnormal panel starting under a low-temperature environment is effectively solved.
Drawings
Fig. 1 is a block diagram of a display panel according to the present invention.
Fig. 2 is a block diagram of a control module in a display panel according to the present invention.
Fig. 3 is a first operation timing diagram of the first switching signal and the second switching signal in the display panel according to the present invention.
Fig. 4 is a second operation timing diagram of the first switching signal and the second switching signal in the display panel according to the present invention.
Fig. 5 is a schematic diagram of a control unit and a switching unit in the display panel according to the present invention.
Fig. 6 is a schematic diagram of a temperature detection module in a display panel according to the present invention.
Fig. 7 is a flowchart of a first embodiment of a driving method of a display panel according to the present invention.
Fig. 8 is a flowchart of a second embodiment of a driving method of a display panel according to the present invention.
Detailed Description
In view of the shortcomings of the prior art, the invention aims to provide a display panel, a driving method thereof and a display device, which can effectively solve the problem that the panel cannot be started in a low-temperature state.
In order to make the objects, technical solutions and effects of the present invention clearer and more specific, the present invention will be described in further detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Referring to fig. 1, the display panel provided by the present invention includes a first driving module 100, a second driving module 200, a temperature detecting module 300 and a control module 400, wherein the first driving module 100 and the second driving module 200 are connected with the control module 400, and the control module 400 is also connected with the temperature detecting module 300.
In this embodiment, the first driving module 100 and the second driving module 200 are all GOA circuits, and the first driving module 100 and the second driving module 200 are both used for controlling the thin film transistors to be turned on row by row when the panel scans and displays, and the temperature detecting module 300 is used for converting the current ambient temperature signal into an electrical signal; the control module 400 is configured to control the first driving module 100 and the second driving module 200 to operate simultaneously when the current environmental temperature is determined to be less than the first preset value according to the electrical signal.
In this embodiment, the first preset value may be smaller than zero, that is, when the control module 400 detects that the current ambient temperature is smaller than zero celsius according to the electrical signal, the control module 400 controls the first driving module 100 and the second driving module 200 to operate simultaneously, and the first driving module 100 and the second driving module 200 output the GOA voltage simultaneously. In this embodiment, the display panel includes a display area and a non-display area, where the first driving module 100 and the second driving module 200 are respectively located at opposite sides of the display area, and when the first driving module 100 and the second driving module 200 output GOA voltages at the same time, each row of thin film transistors in the display area has GOA voltage driving on and off at two ends, which improves the driving capability of opening the thin film transistors, and the two driving modules operate at the same time to raise the temperature rise rapidly, so as to effectively solve the problem of abnormal panel starting under a low temperature environment.
Further, the control module 400 is further configured to control the first driving module 100 or the second driving module 200 to operate when the current environmental temperature is determined to be greater than the second preset value according to the electrical signal; wherein the second preset value is greater than the first preset value; since the service life of the panel is affected by the high start voltage of the thin film transistor, that is, the GOA voltage, and the risk of unable start exists when the start voltage is low, after the first driving module 100 and the second driving module 200 work for a period of time, one of the first driving module 100 and the second driving module 200 is controlled by the control module 400 to operate, so that the panel can work normally.
Further, referring to fig. 2 together, the control module 400 includes a control unit 410 and a switching unit 420, the control unit 410 is connected to the switching unit 420, and the switching unit 420 is further connected to the first driving module 100 and the second driving module 200, respectively. The control unit 410 is configured to output a first control signal when it is determined that the current ambient temperature is less than a preset value according to the electrical signal; the switching unit 420 is configured to output a first switching signal to the first driving module 100 and a second switching signal to the second driving module 200, and set the first switching signal and the second switching signal to a first operation timing according to the first control signal.
In this embodiment, the first driving module 100 is operated when the first switching signal is at a high level, and the second driving module 200 is operated when the second switching signal is at a low level, but it is also possible to operate when the first switching signal is at a high level and the second switching signal is at a high level, or when the first switching signal is at a low level and the second switching signal is at a low level in other embodiments. Referring to fig. 3, the first switching signal is LC1, the second switching signal is LC2, and the first operation time sequence of the first switching signal and the second switching signal in this embodiment is that the first switching signal is high and the second switching signal is low, i.e. the time sequence diagrams of the first switching signal and the second switching signal are mirror symmetry. When the control unit 410 detects that the current ambient temperature is less than the first preset value, a first control signal is output to the switching unit 420, and then the switching unit 420 outputs a first switching signal and a second switching signal of the first working sequence according to the first control signal, so as to control the first driving module 100 and the second driving module 200 to operate simultaneously, and ensure that the panel starts up display normally.
Further, the control unit 410 is further configured to output a second control signal to the switching unit 420 when the current ambient temperature is determined to be greater than the second preset value according to the electrical signal; the switching unit 420 is further configured to output a first switching signal to the first driving module 100, output a second switching signal to the second driving module 200, and set the first switching signal and the second switching signal to a second operation timing according to the second control signal.
In this embodiment, the second operation time sequence is that the first switching signal is at a high level and the second switching signal is at a low level, after a preset time, the second switching signal is switched to a low level, and after a preset time, the first switching signal is switched to a high level, the second switching signal is switched to a low level, and so on, that is, the first switching signal and the second switching signal switch at intervals of a preset time, so that when the first driving module 100 is operated when the first switching signal is at a high level, the second driving module 200 is operated when the second switching signal is at a low level, the first switching signal and the second switching signal control the first driving module 100 and the second driving module 200 to alternately operate under the second operation time sequence. Referring to fig. 4, when the control unit 410 detects that the current ambient temperature is greater than the second preset value, the switching unit 420 is controlled to output the first switching signal and the second switching signal of the second operation timing sequence to control the first driving module 100 and the second driving module 200 to alternately operate. For example, the first switching signal is LC1, the second switching signal is LC2, the first driving module 100 is GOA1, and the second driving module 200 is GOA2; when LC1 is high and LC2 is high, GOA1 starts to operate, and GOA2 stops operating; when LC1 is low level and LC2 is low level, GOA2 starts to operate, and GOA1 stops working, so that the heat dissipation problem of the GOA circuit can be effectively solved.
Of course, in this embodiment, a third operation time sequence may also be set, that is, the third operation time sequence is that the first switching signal is at a high level and the second switching signal is at a low level, at this time, the first driving module 100 and the second driving module 200 operate simultaneously, after a preset time, the second switching signal is switched to a low level, and after a preset time, the first switching signal is switched to a high level, and the second switching signal is switched to a low level, that is, the first driving module 100 and the second driving module 200 operate alternately in this time period. After the first driving module 100 and the second driving module 200 alternately operate for a period of time, the first switching signal is controlled to switch to a high level and the second switching signal is controlled to switch to a low level, so that the first driving module 100 and the second driving module 200 enter the state of simultaneously operating again, and therefore the operation timings of the first switching signal and the second switching signal can be set according to the actual needs, which is not limited in the present invention.
Further, the temperature detection module 300 includes a temperature sensor, and is configured to convert a current ambient temperature into a voltage signal and output the voltage signal to the control unit 410, and in this embodiment, the current ambient temperature is detected by the temperature sensor and converted into the voltage signal and output the voltage signal to the control unit 410, so that the control unit 410 determines the magnitude of the current ambient temperature according to the voltage signal, and further, effective control over the first driving module 100 and the second driving module 200 is implemented, and normal start of the panel in a low-temperature environment is ensured.
Further, referring to fig. 5, in this embodiment, the control unit 410 may be an SOC, the control unit 410 includes an analog-to-digital conversion port for sampling a voltage signal, and in this embodiment, the control unit 410 may be externally connected to a thermistor through the analog-to-digital conversion port to convert a temperature signal into a voltage signal, so as to facilitate temperature detection. Temperature sensing may also be performed in other ways, and the invention is not limited in this regard. When the current ambient temperature is within the low temperature setting range, that is, less than the first preset value, the control unit 410 triggers, and modifies the working timings of the first switching signal and the second switching signal, so as to adjust the first driving module 100 and the second driving module 200 to work simultaneously. It should be noted that, the present invention may be, but not limited to, setting a working timing file of a switching signal that can make two driving modules work, storing the working timing file in a register at the SOC end, and triggering the SOC to call the working timing file at low temperature, so that two driving modules work simultaneously. The two driving modules run simultaneously, the driving capability of the thin film transistor is enhanced and opened, and the problem of abnormal starting of the panel in a low-temperature environment is solved. In addition, as the two-sided GOA works are opened at the same time, the temperature rise of the panel can be quickly increased, so that after the two GOA circuits run for a period of time, the two driving modules are controlled to be switched into a unilateral working mode, and the heat dissipation problem of the GOA circuits is effectively solved.
Specifically, referring to fig. 6, the temperature detection module includes a first resistor R1, a second resistor R2, a third resistor R3, and a capacitor C1, where one end of the first resistor R1 and one end of the capacitor C1 are grounded, the other end of the first resistor R1 is connected to one end of the second resistor R2, the other end of the first resistor R1 is also connected to the other end of the first capacitor C1 and one end of the third resistor R3, the other end of the third resistor R3 and the other end of the second resistor R2 are both connected to electricity, and the other end of the capacitor C1 and one end of the third resistor R3 are also connected to an analog-to-digital conversion port, in which embodiment the second resistor R2 is a thermistor. The temperature signal is converted into a voltage signal through the external thermistor of the analog-digital conversion port of the SOC, so that the temperature detection is realized. When the current ambient temperature is in the low-temperature setting range, that is, less than the first preset value, the SOC end triggers and modifies the working time sequence of the first switching signal and the second switching signal, so as to adjust the first driving module 100 and the second driving module 200 to work simultaneously, and solve the problem of abnormal starting of the panel low-temperature environment.
Further, referring to fig. 5, the switching unit 420 of the present invention includes a level-to-voltage converter, and outputs a first control signal to the level-to-voltage converter when the SOC detects that the current ambient temperature is less than a first preset value, and the level-to-voltage converter outputs a first switching signal and a second switching signal of a first working sequence according to the first control signal, so as to control the first driving module 100 and the second driving module 200 to operate simultaneously, thereby ensuring that the panel starts up display normally; outputting a second control signal to the level voltage converter when the SOC detects that the current ambient temperature is greater than a second preset value; the level voltage converter is further configured to set the first switching signal and the second switching signal to a second operation timing according to the second control signal, so that the first driving module and the second driving module perform an alternate operation at the second operation timing. Further, the display panel in this embodiment further includes a power management chip 500, where the power management chip 500 is connected to the SOC and is configured to provide operating power for the SOC, so as to ensure that the SOC can operate normally.
Further, referring to fig. 7, the present invention also provides a driving method of a display panel, for driving the display panel, where the first embodiment of the driving method includes the following steps:
100. detecting the current environmental temperature and judging whether the current environmental temperature is smaller than a first preset value or not;
200. if yes, the first driving module and the second driving module are controlled to run simultaneously.
In this embodiment, by judging whether the current ambient temperature is less than the first preset value, if the current ambient temperature is less than the first preset value, the first driving module and the second driving module are controlled to operate simultaneously, and the first driving module and the second driving module operate to output the GOA voltage simultaneously, so that each row of thin film transistors in the display area has GOA voltage on two ends to open and drive on and off, the driving capability of opening the thin film transistors is improved, and the temperature rise of the two driving modules can be increased rapidly when the two driving modules operate simultaneously, thereby effectively solving the problem of panel starting abnormality under the low-temperature environment.
Further, referring to fig. 8, in a second embodiment of the driving method, step 200 further includes the following steps:
300. judging whether the current ambient temperature is greater than a second preset value;
400. if yes, controlling the first driving module or the second driving module to operate; wherein the second preset value is greater than the first preset value.
When the control unit detects that the current ambient temperature is higher than a second preset value after the first driving module and the second driving module run for a period of time at the same time, the switching unit is controlled to output a first switching signal and a second switching signal of a second working time sequence so as to control the first driving module and the second driving module to work alternately, and therefore good heat dissipation of the driving modules is ensured.
Further, the present invention also provides a display device, which includes the above display panel, and since the above description of the display panel is omitted here.
In summary, the invention provides a display panel, a driving method thereof and a display device thereof, wherein the display panel comprises a first driving module; a second driving module; the temperature detection module is used for converting the current ambient temperature signal into an electric signal; and the control module is used for controlling the first driving module and the second driving module to operate simultaneously when judging that the current ambient temperature is smaller than a first preset value according to the electric signals, so that the driving capability is effectively improved, and the temperature rise of the two driving modules during operation can be rapidly increased, and further the problem of panel starting abnormality under a low-temperature environment is effectively solved.
It will be understood that equivalents and modifications will occur to those skilled in the art in light of the present invention and their spirit, and all such modifications and substitutions are intended to be included within the scope of the present invention as defined in the following claims.
Claims (7)
1. A display panel, the display panel comprising:
a first driving module;
a second driving module;
the temperature detection module is used for converting the current ambient temperature signal into an electric signal;
the control module is used for controlling the first driving module and the second driving module to operate simultaneously when the current environmental temperature is judged to be smaller than a first preset value according to the electric signals;
the control module is further used for controlling the first driving module or the second driving module to operate when the current environmental temperature is judged to be larger than a second preset value according to the electric signal; wherein the second preset value is greater than the first preset value;
the control module comprises a control unit and a switching unit;
the control unit is used for outputting a first control signal when the current environment temperature is judged to be smaller than a first preset value according to the electric signal;
the switching unit is used for outputting a first switching signal to the first driving module and outputting a second switching signal to the second driving module, and setting the first switching signal and the second switching signal to be a third working time sequence according to the first control signal;
and under the third working time sequence, the first switching signal and the second switching signal control the first driving module and the second driving module to work simultaneously for a period of time when the display panel is started, and then control the first driving module and the second driving module to work alternately.
2. The display panel of claim 1, wherein the control module comprises:
the control unit is also used for outputting a second control signal when judging that the current ambient temperature is greater than a second preset value according to the electric signal;
the switching unit is further configured to output a first switching signal to the first driving module, output a second switching signal to the second driving module, and set the first switching signal and the second switching signal to be a second working time sequence according to the second control signal.
3. The display panel according to claim 2, wherein the temperature detection module comprises a temperature sensor for converting a current ambient temperature into a voltage signal and outputting the voltage signal to the control unit.
4. A display panel according to claim 3, characterized in that the control unit comprises an analog-to-digital conversion port for sampling the voltage signal.
5. The display panel of claim 1, wherein the display panel includes a display area and a non-display area, and the first and second driving modules are located on opposite sides of the display area, respectively.
6. A driving method of a display panel, characterized by being used for driving the display panel according to any one of claims 1 to 5; the driving method includes the steps of:
detecting the current environmental temperature and judging whether the current environmental temperature is smaller than a first preset value or not;
if yes, controlling the first driving module and the second driving module to operate simultaneously;
the step of controlling the first driving module and the second driving module to operate simultaneously further comprises the following steps:
judging whether the current ambient temperature is greater than a second preset value;
if yes, controlling the first driving module or the second driving module to operate; wherein the second preset value is greater than the first preset value.
7. A display device comprising the display panel of any one of claims 1-5.
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| CN112542141A (en) * | 2020-12-01 | 2021-03-23 | Tcl华星光电技术有限公司 | Display device and driving method thereof |
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| CN114242017A (en) | 2022-03-25 |
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