CN111179870A - A power supply driving circuit, its driving method and display device - Google Patents
A power supply driving circuit, its driving method and display device Download PDFInfo
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- CN111179870A CN111179870A CN202010077698.2A CN202010077698A CN111179870A CN 111179870 A CN111179870 A CN 111179870A CN 202010077698 A CN202010077698 A CN 202010077698A CN 111179870 A CN111179870 A CN 111179870A
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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
- G09G3/3648—Control of matrices with row and column drivers using an active matrix
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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
本发明提供了一种电源驱动电路、其驱动方法及显示装置，电源驱动电路，包括：供电芯片、电流补偿模块和输出模块；供电芯片包括电压输出端和电压反馈端，电压输出端与电流补偿模块的输入端电连接，电压反馈端与电流补偿模块的输出端电连接，电流补偿模块的输出端与输出模块的输入端电连接；供电芯片用于根据电流补偿模块的输出端输出的反馈电压与标准电压之间的差值，调整经电压输出端输出的初始电压，使得反馈电压达到标准电压；电流补偿模块用于根据差值补偿经电流补偿模块输出的工作电流，使得工作电流达到预设电流；输出模块用于接收预设电流，并根据预设电流驱动像素驱动电路。用于改善显示装置的电源驱动能力。
The invention provides a power drive circuit, a drive method thereof and a display device. The power drive circuit includes: a power supply chip, a current compensation module and an output module; the power supply chip includes a voltage output end and a voltage feedback end, the voltage output end and the current compensation The input end of the module is electrically connected, the voltage feedback end is electrically connected with the output end of the current compensation module, and the output end of the current compensation module is electrically connected with the input end of the output module; the power supply chip is used for the feedback voltage output by the output end of the current compensation module The difference between the standard voltage and the voltage output terminal adjusts the initial voltage output, so that the feedback voltage reaches the standard voltage; the current compensation module is used to compensate the working current output by the current compensation module according to the difference, so that the working current reaches the preset value Current; the output module is used to receive the preset current and drive the pixel driving circuit according to the preset current. For improving the power drive capability of a display device.
Description
Technical Field
The invention relates to the technical field of display, in particular to a power driving circuit, a driving method thereof and a display device.
Background
The existing liquid crystal display mainly loads voltages on a pixel electrode and a common electrode respectively, an electric field formed between the pixel electrode and the common electrode controls liquid crystal molecules to rotate, the liquid crystal molecules modulate transmitted backlight to enable the backlight to irradiate a color film layer with different light intensities, the color film layer has different light intensity transmittances for different spectral wave bands, and finally, light with required colors is displayed.
Among them, a Power Management Integrated Circuit (PMIC) is a core part of a Power supply required for driving a liquid crystal display.
In the prior art, in order to reduce the PMIC cost, the output mode of the HAVDD signal for driving the pixel driving circuit is adjusted by a BUCK chopper circuit (i.e., BUCK circuit) to a voltage following amplifier circuit (i.e., OP circuit), the OP circuit 01 is built in the PMIC, and its corresponding schematic diagram is shown in fig. 1, specifically, the port of the PMIC for outputting the HAVDD signal is shorted with the port of the PMIC for receiving the feedback voltage FB, so as to realize following of the data converter DAC 02. Furthermore, the PMIC controls the driving capability of the pixel driving circuit by the PMIC by outputting the power supply signal SWI. Since the OP circuit 01 is disposed inside the PMIC, the driving capability is limited due to the structural characteristics of the chip itself.
Disclosure of Invention
The invention provides a power driving circuit, a driving method thereof and a display device, which are used for improving the power driving capability of the display device.
In a first aspect, an embodiment of the present invention provides a power driving circuit, including: the power supply device comprises a power supply chip, a current compensation module and an output module; wherein,
the power supply chip comprises a voltage output end and a voltage feedback end, the voltage output end is electrically connected with the input end of the current compensation module, the voltage feedback end is electrically connected with the output end of the current compensation module, and the output end of the current compensation module is electrically connected with the input end of the output module;
the power supply chip is used for adjusting the initial voltage output by the voltage output end according to the difference value between the feedback voltage output by the output end of the current compensation module and the standard voltage so that the feedback voltage reaches the standard voltage;
the current compensation module is used for compensating the working current output by the current compensation module according to the difference value so that the working current reaches a preset current;
the output module is used for receiving the preset current and driving the pixel driving circuit according to the preset current.
In one possible implementation manner, the current compensation module includes a first switching device and a second switching device electrically connected to the first switching device, a gate of the first switching device is electrically connected to a gate of the second switching device, and a source of the first switching device is electrically connected to a drain of the second switching device.
In a possible implementation manner, when the feedback voltage is smaller than the standard voltage and the difference value is greater than a preset threshold, the first switching device is turned on, the second switching device is turned off, and the first switching device is used for compensating the working current.
In a possible implementation manner, when the feedback voltage is greater than the standard voltage and the difference value is greater than a preset threshold, the first switching device is turned off, the second switching device is turned on, and the second switching device is used for compensating the working current.
In a possible implementation manner, the power driving circuit includes a first resistor, the first resistor is electrically connected to the output end of the power supply module, which is used for outputting the standard voltage, and the input end of the push-pull submodule respectively, and is used for adjusting the input current, which is input to the push-pull submodule by the power supply module, of the power supply module, where a resistance value of the first resistor is in a range of 100 Ω to 150 Ω.
In a possible implementation manner, the current compensation module includes a second resistor and a third resistor, the second resistor is electrically connected to the signal input terminal of the power supply chip and the drain of the first switching device, the third resistor is electrically connected to the source of the second switching device and the ground, respectively, and resistance values of the second resistor and the third resistor are in a range of 160 Ω to 200 Ω.
In a possible implementation manner, the output module includes a fourth resistor and a freewheeling capacitor electrically connected to the fourth resistor and the ground line, respectively, a resistance value of the fourth resistor ranges from 1 Ω to 2.2 Ω, and a capacitance value of the freewheeling capacitor ranges from 30 μ F to 4 μ F.
In a second aspect, embodiments of the present invention provide a display device, including the power supply driving circuit as described above, and a pixel driving circuit electrically connected to the power supply driving circuit.
In a third aspect, an embodiment of the present invention provides a driving method of the power supply driving circuit, which includes:
the power supply chip adjusts the initial voltage output by the voltage output end according to the difference value between the feedback voltage output by the output end of the current compensation module and the standard voltage, so that the feedback voltage reaches the standard voltage;
the current compensation module compensates the working current output by the current compensation module according to the difference value, so that the working current reaches a preset current;
the output module receives the preset current and drives the pixel driving circuit according to the preset current.
In a possible implementation manner, the adjusting, by the power supply chip, the initial voltage output through the voltage output end according to a difference between a feedback voltage output by the output end of the current compensation module and a standard voltage includes:
and if the feedback voltage is smaller than the standard voltage and the difference value is larger than a preset threshold value, controlling a first switching device of the current compensation module to be switched on and controlling a second switching device of the current compensation module to be switched off.
The invention has the following beneficial effects:
the embodiment of the invention provides a power supply driving circuit, a driving method thereof and a display device.A current compensation module is arranged outside a power supply chip, and the power supply chip adjusts initial voltage output by a voltage output end of the power supply chip according to a difference value between feedback voltage output by an output end of the current compensation module and standard voltage so as to enable the feedback voltage to reach the standard voltage, thereby ensuring that the power supply driving circuit can provide stable voltage for a pixel driving circuit electrically connected with the current compensation module. In addition, the current compensation module compensates the working current output by the current compensation module according to the difference between the feedback voltage and the standard voltage, so that the working current reaches the preset current, the required preset current can be provided for the pixel driving circuit through the current compensation module, the possibility of providing various required preset currents for the pixel driving circuit is provided, and the power driving capability of the display device is improved.
Drawings
FIG. 1 is a schematic diagram of an OP circuit in the prior art;
fig. 2 is a schematic structural diagram of a power driving circuit according to an embodiment of the invention;
fig. 3 is a schematic structural diagram of a power driving circuit according to an embodiment of the invention;
fig. 4 is a schematic structural diagram of a power driving circuit according to an embodiment of the invention;
fig. 5 is a schematic structural diagram of a power driving circuit according to an embodiment of the invention;
fig. 6 is a schematic structural diagram of a power driving circuit according to an embodiment of the invention;
fig. 7 is a schematic structural diagram of a display device according to an embodiment of the invention;
fig. 8 is a flowchart of a method for driving a power driving circuit according to an embodiment of the present invention.
Detailed Description
Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. The use of "first," "second," and similar terms in the present application do not denote any order, quantity, or importance, but rather the terms are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items.
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the drawings of the embodiments of the present invention. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. And the embodiments and features of the embodiments may be combined with each other without conflict. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the invention without any inventive step, are within the scope of protection of the invention.
Because the existing OP circuit is arranged in the PMIC and is limited by the structural characteristics of the chip, the driving capability of the OP circuit is often limited.
In view of this, an embodiment of the present invention provides a power driving circuit, as shown in fig. 2, including:
the power supply device comprises a power supply chip 1, a current compensation module 2 and an output module 3; wherein,
the power supply chip 1 comprises a voltage output end and a voltage feedback end, the voltage output end is electrically connected with the input end of the current compensation module 2, the voltage feedback end is electrically connected with the output end of the current compensation module 2, and the output end of the current compensation module 2 is electrically connected with the input end of the output module;
in a specific implementation, the power supply chip 1 may be a PMIC, and the power supply chip 1 is capable of providing a driving voltage for the pixel driving circuit, for example, the driving voltage is 7V, which is not limited herein.
The power supply chip 1 is used for adjusting the initial voltage output by the voltage output end according to the difference value between the feedback voltage output by the output end of the current compensation module 2 and the standard voltage so that the feedback voltage reaches the standard voltage;
in the specific implementation process, the power supply chip 1 follows the feedback voltage output by the output end of the current compensation module 2, so that the power supply chip 1 monitors the voltage output by the output end of the current compensation module 2, and the instantaneity and effectiveness of voltage adjustment are ensured. After the power supply chip 1 receives the feedback voltage output by the output end of the current compensation module 2, the power supply chip 1 determines the difference between the feedback voltage and the standard voltage, then adjusts the initial voltage output by the voltage output end of the power supply chip according to the difference, and further adjusts the feedback voltage to the standard voltage, because the value of the feedback voltage sampled each time is possibly different, correspondingly, when the standard voltage is fixed, the difference between the feedback voltage and the standard voltage is possibly different, and the different differences can be adjusted by the power supply driving circuit to adjust the initial voltage output by the voltage output end of the power supply chip 1, thereby ensuring that the power supply driving circuit can provide stable voltage for the pixel driving circuit electrically connected with the current compensation module 2. In addition, in the specific implementation process, the specific value of the standard voltage can be a value determined according to the actual application requirement, so that the good driving of the pixel driving circuit is ensured, and the display effect of the display device is improved.
The current compensation module 2 is used for compensating the working current output by the current compensation module 2 according to the difference value so that the working current reaches a preset current;
in the specific implementation process, the specific value of the preset current can be a value determined according to the actual application requirement, so that the good driving of the pixel driving circuit is ensured, and the display effect of the display device is improved. In addition, because the value of the feedback voltage sampled each time may be different, correspondingly, when the standard voltage is fixed, the difference between the feedback voltage and the standard voltage may also be different, and the different differences may all be through the power driving circuit, adjust the working current output by the current compensation module 2, compensate the working current through the current compensation module 2, so that the working current reaches the preset current, thereby ensuring that the power driving circuit can provide the required current to the pixel driving circuit electrically connected with the current compensation module 2.
The output module is used for receiving the preset current and driving the pixel driving circuit according to the preset current.
In the specific implementation process, the preset current can be a current value determined according to practical application, so that good driving of the pixel driving circuit can be ensured, and the display effect of the display device is improved.
The embodiment of the invention provides a power supply driving circuit, a driving method thereof and a display device.A current compensation module 2 is arranged outside a power supply chip 1, and the power supply chip 1 adjusts initial voltage output by a voltage output end of the power supply chip 1 according to a difference value between feedback voltage output by an output end of the current compensation module 2 and standard voltage so as to enable the feedback voltage to reach the standard voltage, thereby ensuring that the power supply driving circuit can provide stable voltage for a pixel driving circuit electrically connected with the current compensation module 2. In addition, the current compensation module 2 compensates the working current output by the current compensation module 2 according to the difference between the feedback voltage and the standard voltage, so that the working current reaches the preset current, the current compensation module 2 can provide the required preset current for the pixel driving circuit, and various required preset currents are provided for the pixel driving circuit, thereby improving the power driving capability of the display device.
In the embodiment of the present invention, as shown in fig. 3, one of the structural diagrams of the current driving circuit is shown, specifically, the current compensation module 2 includes a first switching device and a second switching device electrically connected to the first switching device, a gate of the first switching device is electrically connected to a gate of the second switching device, and a source of the first switching device is electrically connected to a drain of the second switching device.
In a specific implementation process, the first switching device and the second switching device are thin film transistors, specifically, the first switching device and the second switching device may be N-type thin film transistors or P-type thin film transistors, and when the first switching device is turned on, the second switching device is turned off. The second switching device is turned on when the first switching device is turned off. That is to say, the two switching devices included in the current compensation module 2 are always turned off when one switching device is turned on, so that the on/off of the first switching device and the second switching device can be controlled according to actual needs, thereby realizing flexible adjustment of the power supply driving circuit. In addition, the current compensation module 2 is composed of only simple thin film transistors, thereby simplifying the manufacturing cost of the current compensation module 2.
In the embodiment of the present invention, the specific adjustment ways of the power supply chip 1 for the first switching device and the second switching device in the current compensation module 2 at least include, but are not limited to, the following two ways. In fig. 3, HAVDD represents an initial voltage output from the power supply chip 1 via the voltage output terminal, and FB represents a feedback voltage output via the output terminal of the current compensation module 2.
First adjustment mode
The first adjustment mode is that when the feedback voltage is smaller than the standard voltage and the difference value is larger than a preset threshold value, the first switching device is turned on, the second switching device is turned off, and the first switching device is used for compensating the working current. In one specific example, the feedback voltage is 6.9V, the reference voltage is 7V, the difference between the reference voltage and the feedback voltage is 0.1V, and the predetermined threshold is 50mV, wherein the difference between the reference voltage and the feedback voltage of 0.1V is greater than the predetermined threshold of 50 mV. At this moment, the driving chip controls the first switch device to be switched on, and the second switch device is switched off, so that the current switching-on capacity of the first switch device is improved, the working current of the current compensation module 2 is compensated, the working current can be improved to the preset current, and the driving capacity of the power driving circuit is improved.
Second adjustment mode
The second adjustment mode is that when the feedback voltage is greater than the standard voltage and the difference value is greater than a preset threshold value, the first switching device is turned off, the second switching device is turned on, and the second switching device is used for compensating the working current. For example, the feedback voltage is 7.2V, the standard voltage is 7V, the difference between the feedback voltage and the standard voltage is 0.2V, and the predetermined threshold is 50mV, wherein the difference between the feedback voltage and the standard voltage of 0.2V is greater than the predetermined threshold of 50 mV. At this moment, the driving chip controls the first switch device to be switched off, and the second switch device to be switched on, so that the current leakage capacity is improved, the working current of the current compensation module 2 is compensated, and the working current can be reduced to the preset current, and therefore, on the premise of reducing the power consumption, the current power driving circuit is ensured to well drive the pixel driving circuit, and the normal work of the display device is ensured.
In an embodiment of the present invention, as shown in fig. 4, a structural schematic diagram of a power supply driving circuit is shown, specifically, the power supply driving circuit includes a first resistor R1, the first resistor R1 is electrically connected to an output terminal of the power supply module for outputting a standard voltage and an input terminal of the push-pull sub-module, respectively, and the first resistor R1 is configured to adjust an input current input to the push-pull sub-module by the power supply module, where a resistance value of the first resistor R1 is in a range from 100 Ω to 150 Ω. In the specific implementation process, the first resistor R1 with the proper resistance value range is selected, so that the situation that the push-pull sub-module is damaged due to serious heating because the input current input into the push-pull sub-module is too large is effectively avoided, and the service life of the push-pull sub-module is prolonged.
In the embodiment of the present invention, as shown in fig. 5, which is a schematic structural diagram of a current driving circuit, a current compensation module 2 includes a second resistor R2 and a third resistor R3, the second resistor R2 is electrically connected to a signal input terminal of a power supply chip 1 and a drain of a first switching device, respectively, and the third resistor R3 is electrically connected to a source of the second switching device and a ground GND, respectively, wherein resistance values of the second resistor R2 and the third resistor R3 are in a range of 160 Ω to 200 Ω. In a specific implementation process, the first switch device of the push-pull submodule draws current from the high-voltage power supply end AVDD of the power supply chip 1 through the second resistor R2, and the second resistor R2 with a proper resistance value range is arranged, so that the first switch device is effectively prevented from being damaged due to serious heating caused by overlarge input current of the first switch device, and the service life of the first switch device is prolonged. In addition, the second switch device of the push-pull submodule discharges current to the ground wire GND through the third resistor R3, and the third resistor R3 in a proper resistance range is arranged, so that the phenomenon that the second switch device is seriously heated and damaged due to overlarge input current of the second switch device is effectively avoided, and the service life of the push-pull submodule is prolonged.
In the embodiment of the invention, as shown in fig. 6, which is a schematic structural diagram of the power driving circuit, the output module includes a fourth resistor R4 and a freewheeling capacitor C electrically connected to the fourth resistor R4 and the ground GND, respectively, a resistance value of the fourth resistor R4 ranges from 1 Ω to 2.2 Ω, and a capacitance value of the freewheeling capacitor C ranges from 30 μ F to 4 μ F. In the specific implementation process, in the process of adjusting the working voltage of the pixel driving circuit through the power driving circuit, the ripple burrs can be effectively absorbed through selecting the fourth resistor R4 with a proper resistance range due to fluctuation of the voltage, so that the stability of a voltage adjustment result is ensured. In addition, the follow current capacitor C is arranged between the fourth resistor R4 and the ground line GND, so that on one hand, the continuous current source in the whole power supply driving circuit is ensured, on the other hand, the voltage response speed of the power supply driving circuit is ensured, and the voltage fluctuation amplitude is reduced.
Based on the same inventive concept, an embodiment of the present invention further provides a display device, as shown in fig. 7, which is one of the structural schematic diagrams of the display device, and the display device includes the power driving circuit 4 provided in the embodiment of the present invention, and the pixel driving circuit 5 electrically connected to the power driving circuit 4.
In a specific implementation, the display device may be: any product or component with a display function, such as a mobile phone (as shown in fig. 7), a tablet computer, a television, a display, a notebook computer, a digital photo frame, a navigator, a watch, and the like. The display device can be implemented by referring to the above embodiments of the display panel, and repeated descriptions are omitted.
Based on the same inventive concept, an embodiment of the present invention further provides a driving method of a power driving circuit, and as shown in fig. 8, the driving method of the power driving circuit includes:
s101: the power supply chip adjusts the initial voltage output by the voltage output end according to the difference value between the feedback voltage output by the output end of the current compensation module and the standard voltage, so that the feedback voltage reaches the standard voltage;
in a specific implementation process, the power supply chip 1 adjusts the initial voltage output by the voltage output end of the power supply chip 1 in reverse according to a difference value between the feedback voltage output by the output end of the current compensation module 2 and the standard voltage, and finally adjusts the feedback voltage to the standard voltage, so that the stability of the feedback voltage is realized. If the standard voltage is the voltage corresponding to the pixel driving circuit with good driving effect, the feedback voltage is adjusted to the standard voltage, so that the power driving circuit is ensured to provide stable voltage for the pixel driving circuit, and the display effect of the display device is improved.
S102: the current compensation module compensates the working current output by the current compensation module according to the difference value, so that the working current reaches a preset current;
in a specific implementation process, the current compensation module 2 compensates the working current output by the current compensation module 2 according to a difference between the feedback voltage and the standard voltage, so that the working current reaches a preset current, the required preset current can be provided for the pixel driving circuit through the current compensation module 2, various required preset currents are provided for the pixel driving circuit, and the power driving capability of the display device is improved.
S103: the output module receives the preset current and drives the pixel driving circuit according to the preset current.
In the specific implementation process, when the preset current is the current corresponding to the pixel driving circuit with good driving effect, the working current of the pixel driving circuit is adjusted to be the preset current, so that the power driving circuit is ensured to have good driving capability to the pixel driving circuit, and the display effect of the display device is improved.
In the embodiment of the present invention, step S101: the power supply chip adjusts the initial voltage output by the voltage output end according to the difference between the feedback voltage output by the output end of the current compensation module and the standard voltage, and the power supply chip comprises:
and if the feedback voltage is smaller than the standard voltage and the difference value is larger than a preset threshold value, controlling a first switching device of the current compensation module 2 to be switched on and controlling a second switching device of the current compensation module 2 to be switched off.
In the embodiment of the present invention, step S101: the power supply chip adjusts the initial voltage output by the voltage output end according to the difference between the feedback voltage output by the output end of the current compensation module and the standard voltage, and the power supply chip comprises:
if the feedback voltage is greater than the standard voltage and the difference value is greater than a preset threshold value, the first switch device is turned off, the second switch device is turned on, and the second switch device is used for compensating the working current.
The embodiment of the invention provides a power supply driving circuit, a driving method thereof and a display device.A current compensation module 2 is arranged outside a power supply chip 1, and the power supply chip 1 adjusts initial voltage output by a voltage output end of the power supply chip 1 according to a difference value between feedback voltage output by an output end of the current compensation module 2 and standard voltage so as to enable the feedback voltage to reach the standard voltage, thereby ensuring that the power supply driving circuit can provide stable voltage for a pixel driving circuit electrically connected with the current compensation module 2. In addition, the current compensation module 2 compensates the working current output by the current compensation module 2 according to the difference between the feedback voltage and the standard voltage, so that the working current reaches the preset current, the current compensation module 2 can provide the required preset current for the pixel driving circuit, and various required preset currents are provided for the pixel driving circuit, thereby improving the power driving capability of the display device.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.
Claims (10)
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010077698.2A CN111179870A (en) | 2020-01-31 | 2020-01-31 | A power supply driving circuit, its driving method and display device |
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| CN202010077698.2A CN111179870A (en) | 2020-01-31 | 2020-01-31 | A power supply driving circuit, its driving method and display device |
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Cited By (6)
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| CN112539835A (en) * | 2020-11-11 | 2021-03-23 | 昆山书豪仪器科技有限公司 | Spectrum collection device |
| WO2022056930A1 (en) * | 2020-09-21 | 2022-03-24 | 华为技术有限公司 | Voltage regulation circuit, device and method |
| CN114967809A (en) * | 2022-05-24 | 2022-08-30 | 芯海科技（深圳）股份有限公司 | Current stabilizing circuit and current stabilizing method thereof, integrated circuit and electronic equipment |
| CN116546692A (en) * | 2023-06-15 | 2023-08-04 | Tcl华星光电技术有限公司 | Light-emitting substrate and driving method |
| WO2023226971A1 (en) * | 2022-05-24 | 2023-11-30 | 芯海科技（深圳）股份有限公司 | Voltage stabilizing circuit and voltage stabilizing method therefor, integrated circuit, and electronic device |
| CN118298772A (en) * | 2024-03-27 | 2024-07-05 | 惠科股份有限公司 | Display driving circuit and display device |
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