CN112435621A - Voltage control circuit, voltage output control method and display device - Google Patents

Voltage control circuit, voltage output control method and display device Download PDF

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Publication number
CN112435621A
CN112435621A CN202011330234.4A CN202011330234A CN112435621A CN 112435621 A CN112435621 A CN 112435621A CN 202011330234 A CN202011330234 A CN 202011330234A CN 112435621 A CN112435621 A CN 112435621A
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temperature
voltage
signal
determining
adjusting
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张春兵
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BOE Technology Group Co Ltd
Beijing BOE Display Technology Co Ltd
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BOE Technology Group Co Ltd
Beijing BOE Display Technology Co Ltd
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Priority to CN202011330234.4A priority Critical patent/CN112435621A/en
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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
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/0209—Crosstalk reduction, i.e. to reduce direct or indirect influences of signals directed to a certain pixel of the displayed image on other pixels of said image, inclusive of influences affecting pixels in different frames or fields or sub-images which constitute a same image, e.g. left and right images of a stereoscopic display
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/0257—Reduction of after-image effects
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/04—Maintaining the quality of display appearance
    • G09G2320/041—Temperature compensation

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)

Abstract

The disclosure provides a voltage control circuit, a voltage output control method and a display device, and relates to the technical field of display. The voltage control circuit: the temperature detection unit is used for detecting the ambient temperature according to a preset period and outputting a temperature signal according to the detected ambient temperature; the voltage generating unit is used for providing a power supply signal; and the voltage regulating unit is connected with the temperature detecting unit and the voltage generating unit and used for outputting an adjusting signal according to the temperature signal and converting the voltage of the power supply signal into output voltage according to the adjusting signal. The voltage control circuit provided by the disclosure can output matched output voltages at different environmental temperatures, thereby improving the problems of image retention, crosstalk and the like of the display device.

Description

Voltage control circuit, voltage output control method and display device
Technical Field
The disclosure relates to the technical field of display, in particular to a voltage control circuit, a voltage output control method and a display device.
Background
With the rapid development of display technology, the demand of people for large-size high-resolution display products is increasing day by day, and the requirements for the display effect of the display products are higher and higher. With the improvement of the size and resolution of display products and the development of display modules towards lightness, thinness and no frame, the problem that the quality of display pictures is reduced along with the change of environmental temperature is increasingly obvious.
The reason is that the operating characteristics of the internal components of the display product slightly change with the temperature, and the setting parameters configured before the factory shipment are difficult to cover each temperature change situation, so that the problem of uneven brightness (mura) or crosstalk (crosstalk) is easy to occur at certain temperatures, and the picture quality of the display product is seriously affected.
It is to be noted that the information disclosed in the above background section is only for enhancement of understanding of the background of the present disclosure, and thus may include information that does not constitute prior art known to those of ordinary skill in the art.
Disclosure of Invention
The present disclosure is directed to a voltage control circuit, a voltage output control method, and a display device, which are capable of outputting matched output voltages at different ambient temperatures, thereby improving the problems of image sticking, crosstalk, and the like of the display device.
According to an aspect of the present disclosure, there is provided a voltage control circuit including:
the temperature detection unit is used for detecting the ambient temperature according to a preset period and outputting a temperature signal according to the detected ambient temperature;
a voltage generating unit for providing a power supply signal;
and the voltage regulating unit is connected with the temperature detecting unit and the voltage generating unit and used for outputting an adjusting signal according to the temperature signal and converting the voltage of the power supply signal into output voltage according to the adjusting signal.
In an exemplary embodiment of the present disclosure, outputting an adjustment signal according to the temperature signal includes:
presetting a plurality of temperature ranges;
presetting a plurality of adjusting signals, and correspondingly matching the plurality of adjusting signals with a plurality of temperature ranges one by one;
determining the temperature range according to the temperature signal;
and determining an adjusting signal according to the determined temperature range.
In an exemplary embodiment of the present disclosure, presetting a plurality of adjustment signals and matching the plurality of adjustment signals with a plurality of temperature ranges in a one-to-one correspondence includes:
determining the optimal output voltage in each temperature range;
and determining a corresponding adjusting signal according to the optimal output voltage to form a plurality of adjusting signals which are correspondingly matched with a plurality of temperature ranges one by one.
In an exemplary embodiment of the present disclosure, the adjustment signal is a duty cycle or a voltage.
In an exemplary embodiment of the present disclosure, the voltage regulating unit includes:
a regulator configured to convert a voltage of the power supply signal into an output voltage according to the adjustment signal.
In an exemplary embodiment of the present disclosure, the regulator is one of a triode, a thin film transistor, or a thyristor.
According to another aspect of the present disclosure, there is provided a control method of a voltage output, the control method including:
detecting the ambient temperature according to a preset period, and determining a temperature signal;
determining an adjusting signal of the voltage of the power supply signal according to the temperature signal;
and converting the voltage of the power supply signal into an output voltage according to the adjusting signal.
In an exemplary embodiment of the present disclosure, determining an adjustment signal for a voltage of a power supply signal according to the ambient temperature includes:
presetting a plurality of temperature ranges;
presetting a plurality of adjusting signals, and correspondingly matching the plurality of adjusting signals with a plurality of temperature ranges one by one;
determining the temperature range according to the temperature signal;
and determining an adjusting signal according to the determined temperature range.
In an exemplary embodiment of the present disclosure, presetting a plurality of adjustment signals and matching the plurality of adjustment signals with a plurality of temperature ranges in a one-to-one correspondence includes:
determining the optimal output voltage in each temperature range;
and determining a corresponding adjusting signal according to the optimal output voltage to form a plurality of adjusting signals which are correspondingly matched with a plurality of temperature ranges one by one.
According to still another aspect of the present disclosure, there is provided a display device including the voltage control circuit described above.
The voltage control circuit provided by the disclosure can periodically acquire the ambient temperature through the temperature detection unit, the voltage regulation unit can output an adjustment signal according to the acquired ambient temperature and a temperature signal, and converts the voltage of a power supply signal into an output voltage according to the adjustment signal, so that the output voltage is matched with the ambient temperature, the matched output voltage is output at different ambient temperatures, the problems of image retention, crosstalk and the like of the display device are solved, and the effect of improving the image quality is achieved.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure. It is to be understood that the drawings in the following description are merely exemplary of the disclosure, and that other drawings may be derived from those drawings by one of ordinary skill in the art without the exercise of inventive faculty.
Fig. 1 is a schematic diagram of a voltage control circuit according to an embodiment of the disclosure;
FIG. 2 is a schematic diagram of a voltage control circuit according to another embodiment of the present disclosure;
FIG. 3 is a schematic diagram of a voltage control circuit according to yet another embodiment of the present disclosure;
FIG. 4 is a flow chart of a method of controlling voltage output provided by an embodiment of the present disclosure;
FIG. 5 is a graph of gate-source voltage versus drain electrode at different temperatures according to one embodiment of the present disclosure;
FIG. 6 is a schematic diagram of the division of different temperature zones provided by an embodiment of the present disclosure;
FIGS. 7 and 8 are comparison diagrams of the display device after the image retention is improved;
fig. 9 and 10 are comparison diagrams showing the display device after crosstalk is improved.
Detailed Description
Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus their detailed description will be omitted.
The terms "a," "an," "the," "said" are used to indicate the presence of one or more elements/components/etc.; the terms "comprising" and "having" are intended to be inclusive and mean that there may be additional elements/components/etc. other than the listed elements/components/etc.; the terms "first" and "second" are used merely as labels, and are not limiting on the number of their objects.
Embodiments of the present disclosure first provide a voltage control circuit, as shown in fig. 1, the voltage control circuit: the temperature detection unit 10 is used for detecting the ambient temperature according to a preset period and outputting a temperature signal according to the detected ambient temperature; the voltage generating unit 30 is used for providing a power supply signal; the voltage adjusting unit 20 is connected to the temperature detecting unit and the voltage generating unit, and is configured to output an adjustment signal according to the temperature signal, and convert the voltage of the power signal into an output voltage according to the adjustment signal. The preset period may be designed according to actual needs, for example, every 10s, 1min, 5min, and the like, which is not limited in this disclosure.
The voltage control circuit provided by the disclosure can periodically acquire the ambient temperature through the temperature detection unit, the voltage regulation unit can output an adjustment signal according to the acquired ambient temperature and a temperature signal, and converts the voltage of a power supply signal into an output voltage according to the adjustment signal, so that the output voltage is matched with the ambient temperature, the matched output voltage is output at different ambient temperatures, the problems of image retention, crosstalk and the like of the display device are solved, and the effect of improving the image quality is achieved.
Wherein, outputting an adjustment signal according to the temperature signal comprises: presetting a plurality of temperature ranges; presetting a plurality of adjusting signals, and correspondingly matching the plurality of adjusting signals with a plurality of temperature ranges one by one; determining the temperature range according to the temperature signal; and determining an adjusting signal according to the determined temperature range.
Wherein, predetermine a plurality of adjustment signals to with a plurality of adjustment signals and a plurality of temperature range one-to-one correspondence match, include: determining the optimal output voltage in each temperature range; and determining a corresponding adjusting signal according to the optimal output voltage to form a plurality of adjusting signals which are correspondingly matched with a plurality of temperature ranges one by one.
For example, the adjusting signal may be a duty cycle, and the controlling the duty cycle of the control signal according to the ambient temperature includes: presetting a plurality of temperature ranges; presetting a plurality of duty ratios, and correspondingly matching the duty ratios with a plurality of temperature ranges one by one; determining the temperature range according to the detected environment temperature; determining a duty ratio according to the determined temperature range; and controlling the duty ratio of the control signal according to the determined duty ratio.
Wherein, predetermine a plurality of duty cycles to correspond a plurality of duty cycles and a plurality of temperature ranges one-to-one and match, include: determining the optimal output voltage in each temperature range; and determining the corresponding duty ratio according to the optimal output voltage to form a plurality of duty ratios which are correspondingly matched with a plurality of temperature ranges one by one.
For example, the adjusting signal may be a voltage, and the voltage of the control signal is controlled according to the ambient temperature, including: presetting a plurality of temperature ranges; presetting a plurality of voltages, and correspondingly matching the plurality of voltages with a plurality of temperature ranges one by one; determining the temperature range according to the detected environment temperature; determining a voltage according to the determined temperature range; controlling the voltage of the control signal according to the determined voltage.
Wherein, predetermine a plurality of voltages to with a plurality of voltages and a plurality of temperature range one-to-one correspondence match, include: determining the optimal output voltage in each temperature range; and determining corresponding voltage according to the optimal output voltage to form a plurality of voltages which are correspondingly matched with a plurality of temperature ranges one by one.
For example, as shown in fig. 5 and fig. 6, the TFT (thin film transistor) characteristic curves of the liquid crystal panel at different environmental temperatures in the temperature application interval are tested according to the product requirements, for example, according to the product requirements of-30 ° - +85 °, the span of the environmental temperature interval is about 120 °, eight groups of V-T (voltage-temperature) tests are performed according to the environmental interval of 120 ° in every 15 ° group, and then eight V-T curves are obtained to correspond to the eight temperature intervals, and the optimal VGL (gate low level) value of the TFT in the temperature interval can be found in each temperature curve, so that the VGL value corresponding to each temperature in the interval is obtained. Fig. 7 and 9 are schematic diagrams illustrating image retention and crosstalk of a conventional display image, and fig. 8 and 10 are schematic diagrams illustrating image retention and crosstalk of a display image improved by the original embodiment; as shown in fig. 7-10, the afterimage and crosstalk of the image after VGL is adjusted according to the ambient temperature are significantly improved.
Specifically, the voltage regulating unit includes a regulator configured to convert a voltage of the power supply signal into an output voltage according to the adjustment signal. Wherein, the regulator is one of a triode, a thin film transistor or a thyristor. Of course, the regulator may be other devices capable of regulating the size of the VGL, and the disclosure is not limited thereto.
Illustratively, as shown in fig. 3, the regulator is a triode, a base B of the triode is connected to the temperature detecting unit 10 and is configured to receive the adjusting signal GD6, a collector C of the triode is connected to the voltage generating unit 30 and is configured to receive the power signal, and an emitter E of the triode is configured to output the output voltage. And outputting the base electrode through the control signal after adjusting the voltage or the duty ratio, and realizing the control of the VGL value by controlling the base electrode.
Illustratively, the regulator is a thin film transistor, a control electrode of which is connected to the temperature detecting unit 10 and is configured to receive the adjustment signal, a first electrode of which is connected to the voltage generating unit 30 and is configured to receive the power signal, and a second electrode of which is configured to output the output voltage. The control electrode is a grid electrode, the first electrode is a drain electrode, and the second electrode is a source electrode; of course, the first pole can also be a source, and the second pole can also be a drain. And outputting a control electrode through the control signal after adjusting the voltage or the duty ratio, and realizing the control of the VGL value by controlling the control electrode. The thin film transistor can be a MOS transistor.
Illustratively, the regulator is a thyristor, a gate of the thyristor is connected to the temperature detecting unit 10 and is configured to receive the adjustment signal, an anode of the thyristor is connected to the voltage generating unit 30 and is configured to receive the power signal, and a cathode of the thyristor is configured to output the output voltage. And the control signal output gate after the voltage or the duty ratio is regulated is used for controlling the gate to realize the control of the VGL value.
Specifically, as shown in fig. 2, the temperature detection unit 10 includes: the temperature sensor 110 and an analog-to-digital converter (AD)120, the temperature sensor 110 is used for detecting the ambient temperature, and the AD 120 is connected to the temperature sensor 110 and is used for converting the temperature information detected by the temperature sensor 110 into a temperature digital signal.
Specifically, the voltage regulating unit 20 includes: the collector (MCU)210 is connected to the analog-to-digital converter 120, and is configured to output an adjustment signal according to the temperature digital signal, and control the VGL end 310 to convert the voltage of the power signal into an output voltage according to the adjustment signal.
The present disclosure also provides a control method of voltage output, as shown in fig. 4, the control method includes:
s100, detecting the ambient temperature according to a preset period, and determining a temperature signal;
step S200, determining an adjusting signal of the voltage of the power supply signal according to the temperature signal;
and step S300, converting the voltage of the power supply signal into an output voltage according to the adjusting signal.
According to the voltage output control method provided by the disclosure, the ambient temperature is periodically acquired, an adjusting signal can be output according to the acquired ambient temperature and a temperature signal, the voltage of a power supply signal is converted into the output voltage according to the adjusting signal, the output voltage is matched with the ambient temperature, and the matched output voltage is output at different ambient temperatures, so that the problems of image sticking, crosstalk and the like of a display device are solved, and the effect of improving the image quality is achieved.
Hereinafter, each step in the control method of the voltage output provided by the present disclosure will be described in detail.
In step S100, the ambient temperature is detected according to a preset period, and a temperature signal is determined.
Specifically, the ambient temperature is periodically acquired by using the temperature sensor, and the specific period can be designed according to actual needs, for example, every 10s, 1min, 5min, and the like, which is not limited by the present disclosure. The analog-to-digital converter is connected with the temperature sensor and used for converting the temperature information detected by the temperature sensor into a temperature digital signal.
In step S200, an adjustment signal of the voltage of the power supply signal is determined according to the temperature signal.
Specifically, a plurality of temperature ranges are preset; presetting a plurality of adjusting signals, and correspondingly matching the plurality of adjusting signals with a plurality of temperature ranges one by one; determining the temperature range according to the temperature signal; and determining an adjusting signal according to the determined temperature range.
Wherein, predetermine a plurality of adjustment signals to with a plurality of adjustment signals and a plurality of temperature range one-to-one correspondence match, include: determining the optimal output voltage in each temperature range; and determining a corresponding adjusting signal according to the optimal output voltage to form a plurality of adjusting signals which are correspondingly matched with a plurality of temperature ranges one by one.
For example, the adjusting signal may be a duty cycle, and the controlling the duty cycle of the control signal according to the ambient temperature includes: presetting a plurality of temperature ranges; presetting a plurality of duty ratios, and correspondingly matching the duty ratios with a plurality of temperature ranges one by one; determining the temperature range according to the detected environment temperature; determining a duty ratio according to the determined temperature range; and controlling the duty ratio of the control signal according to the determined duty ratio.
Wherein, predetermine a plurality of duty cycles to correspond a plurality of duty cycles and a plurality of temperature ranges one-to-one and match, include: determining the optimal output voltage in each temperature range; and determining the corresponding duty ratio according to the optimal output voltage to form a plurality of duty ratios which are correspondingly matched with a plurality of temperature ranges one by one.
For example, the adjusting signal may be a voltage, and the voltage of the control signal is controlled according to the ambient temperature, including: presetting a plurality of temperature ranges; presetting a plurality of voltages, and correspondingly matching the plurality of voltages with a plurality of temperature ranges one by one; determining the temperature range according to the detected environment temperature; determining a voltage according to the determined temperature range; controlling the voltage of the control signal according to the determined voltage.
Wherein, predetermine a plurality of voltages to with a plurality of voltages and a plurality of temperature range one-to-one correspondence match, include: determining the optimal output voltage in each temperature range; and determining corresponding voltage according to the optimal output voltage to form a plurality of voltages which are correspondingly matched with a plurality of temperature ranges one by one.
Illustratively, testing TFT (thin film transistor) characteristic curves of the liquid crystal display at different environmental temperatures in a temperature application interval according to product requirements, for example, according to the product requirements of-30 to +85 degrees, according to the environmental temperature interval span of about 120 degrees, according to the environmental interval of 120 degrees, eight groups of V-T (voltage-temperature) tests are carried out according to every 15 degrees, and then eight V-T curves are obtained to correspond to the eight temperature intervals, and the optimal VGL (grid low level) value of the TFT in the temperature interval can be found in each temperature curve, so that the VGL value corresponding to each temperature in the interval is obtained, and then according to the determined optimal VGL value, the adjustment signals of each temperature interval are determined, so as to form a plurality of adjustment signals which are matched with the plurality of temperature ranges in a one-to-one correspondence manner.
In step S300, the voltage of the power supply signal is converted into an output voltage according to the adjustment signal.
Specifically, the voltage regulating unit includes a regulator configured to convert a voltage of the power supply signal into an output voltage according to the adjustment signal. Wherein, the regulator is one of a triode, a thin film transistor or a thyristor. Of course, the regulator may be other devices capable of regulating the size of the VGL, and the disclosure is not limited thereto.
Illustratively, as shown in fig. 3, the regulator is a triode, a base B of the triode is connected to the temperature detecting unit 10 and is configured to receive the adjusting signal GD6, a collector C of the triode is connected to the voltage generating unit 30 and is configured to receive the power signal, and an emitter E of the triode is configured to output the output voltage. And outputting the base electrode through the control signal after adjusting the voltage or the duty ratio, and realizing the control of the VGL value by controlling the base electrode.
For example, the regulator may be a thin film transistor, a control electrode of which is connected to the temperature detecting unit 10 and is configured to receive the adjustment signal, a first electrode of which is connected to the voltage generating unit 30 and is configured to receive the power signal, and a second electrode of which is configured to output the output voltage. The control electrode is a grid electrode, the first electrode is a drain electrode, and the second electrode is a source electrode; of course, the first pole can also be a source, and the second pole can also be a drain. And outputting a control electrode through the control signal after adjusting the voltage or the duty ratio, and realizing the control of the VGL value by controlling the control electrode. The thin film transistor can be a MOS transistor.
For example, the regulator may be a thyristor, a gate of which is connected to the temperature detecting unit 10 and is configured to receive the adjustment signal, an anode of which is connected to the voltage generating unit 30 and is configured to receive the power signal, and a cathode of which is configured to output the output voltage. And the control signal output gate after the voltage or the duty ratio is regulated is used for controlling the gate to realize the control of the VGL value.
Specifically, as shown in fig. 2, the temperature detection unit 10 includes: the temperature sensor 110 and an analog-to-digital converter (AD)120, the temperature sensor 110 is used for detecting the ambient temperature, and the AD 120 is connected to the temperature sensor 110 and is used for converting the temperature information detected by the temperature sensor 110 into a temperature digital signal.
Specifically, the voltage regulating unit 20 includes: the collector (MCU)210 is connected to the analog-to-digital converter 120, and is configured to output an adjustment signal according to the temperature digital signal, and control the VGL end 310 to convert the voltage of the power signal into an output voltage according to the adjustment signal.
It should be noted that although the various steps of the methods of the present disclosure are depicted in the drawings in a particular order, this does not require or imply that these steps must be performed in this particular order, or that all of the depicted steps must be performed, to achieve desirable results. Additionally or alternatively, certain steps may be omitted, multiple steps combined into one step execution, and/or one step broken down into multiple step executions, etc.
The present disclosure also provides a display device including the above voltage control circuit. The display device may be a liquid crystal display device, or an organic light emitting device, and specifically may be a device having a display function, such as a mobile phone, a television, an advertisement screen, and the like, which are not listed herein. The beneficial effects of the voltage control circuit can be referred to, and are not described herein again.
It should be noted that although in the above detailed description several modules or units of the device for action execution are mentioned, such a division is not mandatory. Indeed, the features and functionality of two or more modules or units described above may be embodied in one module or unit, according to embodiments of the invention. Conversely, the features and functions of one module or unit described above may be further divided into embodiments by a plurality of modules or units.
Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.
It is to be understood that the present disclosure is not limited to the constituent elements that have been described above and illustrated in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims (10)

1. A voltage control circuit, comprising:
the temperature detection unit is used for detecting the ambient temperature according to a preset period and outputting a temperature signal according to the detected ambient temperature;
a voltage generating unit for providing a power supply signal;
and the voltage regulating unit is connected with the temperature detecting unit and the voltage generating unit and used for outputting an adjusting signal according to the temperature signal and converting the voltage of the power supply signal into output voltage according to the adjusting signal.
2. The control circuit of claim 1, wherein outputting an adjustment signal based on the temperature signal comprises:
presetting a plurality of temperature ranges;
presetting a plurality of adjusting signals, and correspondingly matching the plurality of adjusting signals with a plurality of temperature ranges one by one;
determining the temperature range according to the temperature signal;
and determining an adjusting signal according to the determined temperature range.
3. The control circuit of claim 2, wherein presetting a plurality of adjustment signals and matching the plurality of adjustment signals with a plurality of temperature ranges in a one-to-one correspondence comprises:
determining the optimal output voltage in each temperature range;
and determining a corresponding adjusting signal according to the optimal output voltage to form a plurality of adjusting signals which are correspondingly matched with a plurality of temperature ranges one by one.
4. The control circuit of claim 1, wherein the adjustment signal is a duty cycle or a voltage.
5. The control circuit of claim 1, wherein the voltage regulation unit comprises:
a regulator configured to convert a voltage of the power supply signal into an output voltage according to the adjustment signal.
6. The control circuit of claim 5, wherein the regulator is one of a triode, a thin film transistor, or a thyristor.
7. A method of controlling a voltage output, comprising:
detecting the ambient temperature according to a preset period, and determining a temperature signal;
determining an adjusting signal of the voltage of the power supply signal according to the temperature signal;
and converting the voltage of the power supply signal into an output voltage according to the adjusting signal.
8. The control method of claim 7, wherein determining an adjustment signal for the voltage of the power supply signal based on the ambient temperature comprises:
presetting a plurality of temperature ranges;
presetting a plurality of adjusting signals, and correspondingly matching the plurality of adjusting signals with a plurality of temperature ranges one by one;
determining the temperature range according to the temperature signal;
and determining an adjusting signal according to the determined temperature range.
9. The control method according to claim 8, wherein presetting a plurality of adjustment signals and matching the plurality of adjustment signals with a plurality of temperature ranges in a one-to-one correspondence includes:
determining the optimal output voltage in each temperature range;
and determining a corresponding adjusting signal according to the optimal output voltage to form a plurality of adjusting signals which are correspondingly matched with a plurality of temperature ranges one by one.
10. A display device characterized by the voltage control circuit of any one of claims 1 to 6.
CN202011330234.4A 2020-11-24 2020-11-24 Voltage control circuit, voltage output control method and display device Pending CN112435621A (en)

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