CN113556034B - SIMO circuit control method, display device and storage medium - Google Patents

SIMO circuit control method, display device and storage medium Download PDF

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Publication number
CN113556034B
CN113556034B CN202110866918.4A CN202110866918A CN113556034B CN 113556034 B CN113556034 B CN 113556034B CN 202110866918 A CN202110866918 A CN 202110866918A CN 113556034 B CN113556034 B CN 113556034B
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simo
controlling
simo circuit
discharge
circuit
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CN113556034A (en
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孙志松
陈心全
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Kunshan Govisionox Optoelectronics Co Ltd
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Kunshan Govisionox Optoelectronics Co Ltd
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00—Conversion of dc power input into dc power output
    • H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
    • H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
    • 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

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

Abstract

The invention discloses a SIMO circuit control method, a display device and a storage medium. The SIMO circuit is used for providing power supply for the display panel, and the method comprises the following steps: acquiring the load capacity of a display panel electrically connected with the SIMO circuit; if the load capacity of the display panel is smaller than or equal to a first preset threshold value, controlling the SIMO circuit to work in a first working mode; if the load capacity of the display panel is greater than a first preset threshold value and less than or equal to a second preset threshold value, controlling the SIMO circuit to work in a second working mode; if the load capacity of the display panel is larger than a second preset threshold value, the SIMO circuit is controlled to work in a third working mode; the first preset threshold is smaller than the second preset threshold. The invention can adjust the inductance charging and discharging scheme of the SIMO circuit, improve the interference problem between inductance charging and discharging and reduce the requirement of the SIMO circuit on the inductance specification.

Description

SIMO circuit control method, display device and storage medium
Technical Field
The embodiment of the invention relates to the technical field of display, in particular to a SIMO circuit control method, a display device and a storage medium.
Background
With the continuous development of display technology, the demand of people for display devices is higher and higher. The power supply is used as a main device for supplying power to the display device, and the quality of the performance of the power supply directly influences the yield of the display device.
A Single Inductor Multiple Output (SIMO) circuit is a circuit that provides Multiple outputs through a Single Inductor, and is capable of providing an ELVDD voltage, an ELVSS voltage, and an AVDD voltage required by a pixel circuit and a display driver to a display device. However, since the SIMO circuit uses only one inductor to charge and discharge to generate positive and negative voltages, cross interference occurs between charging and discharging of the inductor.
Disclosure of Invention
The invention provides a control method of an SIMO circuit, a display panel and a display device, which can adjust an inductance charging and discharging scheme of the SIMO circuit, improve the interference problem between inductance charging and discharging and reduce the requirement of the SIMO circuit on inductance specification.
In a first aspect, an embodiment of the present invention provides a method for controlling an SIMO circuit, where the SIMO circuit is used to provide power for a display panel, and the method includes:
acquiring the load capacity of a display panel electrically connected with the SIMO circuit;
if the load capacity of the display panel is smaller than or equal to a first preset threshold value, controlling the SIMO circuit to work in a first working mode;
if the load capacity of the display panel is greater than a first preset threshold value and less than or equal to a second preset threshold value, controlling the SIMO circuit to work in a second working mode;
if the load capacity of the display panel is larger than a second preset threshold value, the SIMO circuit is controlled to work in a third working mode; the first preset threshold is smaller than the second preset threshold.
The above SIMO circuit control method, optionally, acquiring a load amount of the display panel electrically connected to the SIMO circuit, includes:
acquiring the load capacity of a display panel in real time; alternatively, the first and second electrodes may be,
and periodically acquiring the load capacity of the display panel according to a preset period.
The SIMO circuit control method as above, optionally, controlling the SIMO circuit to operate in the first operating mode, includes:
and controlling the SIMO circuit to sequentially and circularly execute a positive voltage charging and discharging period and a negative voltage charging and discharging period, wherein the sum of charging and discharging time of the SIMO circuit in the positive voltage charging and discharging period is less than the total time of the positive voltage charging and discharging period, and the sum of charging and discharging time of the SIMO circuit in the negative voltage charging and discharging period is less than the total time of the negative voltage charging and discharging period.
The SIMO circuit control method as above, optionally, controlling the SIMO circuit to perform a positive voltage charge-discharge cycle, comprising:
controlling SIMO circuit charging T 11 Duration and control of positive voltage discharge T from SIMO circuit to display panel 12 Duration, T 13 Entering a negative pressure charge-discharge cycle after the time is long;
controlling the SIMO circuit to perform a negative charge-discharge cycle comprising:
controlling SIMO circuit charging T 14 Duration, and control of negative voltage discharge T from SIMO circuit to display panel 15 Duration, T 16 And entering a positive voltage charging and discharging period after the time is long.
The SIMO circuit control method as above, optionally, controlling the SIMO circuit to operate in the second operating mode, includes:
and controlling the SIMO circuit to continuously execute a single charge-discharge period, wherein in the single charge-discharge period, the inductance of the SIMO circuit carries out positive voltage discharge and negative voltage discharge once, the single charge-discharge period comprises a positive voltage charge-discharge period and a negative voltage charge-discharge period, the duration of the positive voltage charge-discharge period is equal to the sum of the positive voltage charge duration and the positive voltage discharge duration, and the duration of the negative voltage charge-discharge period is equal to the sum of the negative voltage charge duration and the negative voltage discharge duration.
The SIMO circuit control method as above, optionally, controlling the SIMO circuit to continuously perform a single charge-discharge cycle, comprising:
controlling SIMO circuit charging T 21 Duration and control of positive voltage discharge T from SIMO circuit to display panel 22 A duration;
controlling SIMO circuit charging T 23 Duration, and control of negative voltage discharge T from SIMO circuit to display panel 24 The length of time.
The SIMO circuit control method as above, optionally, controlling the SIMO circuit to operate in a third operating mode, includes:
and controlling the SIMO circuit to continuously execute a plurality of charge and discharge cycles, wherein in one plurality of charge and discharge cycles, the inductance of the SIMO circuit carries out N times of positive voltage discharge and N times of negative voltage discharge, the N times of positive voltage discharge are mutually continuous, the N times of negative voltage discharge are mutually continuous, N is more than or equal to 2, and N is a positive integer.
The SIMO circuit control method as above, optionally, N =2 or N =3;
when N =2, controlling the SIMO circuit to continuously perform a plurality of charge and discharge cycles includes:
controlling SIMO circuit charging T 31 Duration and control of positive voltage discharge T from SIMO circuit to display panel 32 A duration;
controlling SIMO circuit charging T 33 Duration and control of positive voltage discharge T from SIMO circuit to display panel 34 A duration;
controlling SIMO circuit charging T 35 Duration, and control of negative voltage discharge T from SIMO circuit to display panel 36 A duration;
controlling SIMO circuit charging T 37 Duration, and control of negative voltage discharge T from SIMO circuit to display panel 38 The length of time.
In a second aspect, embodiments of the present invention also provide a display device, including a SIMO circuit and a display panel; the SIMO circuit is controlled by the SIMO circuit control method having any of the features of the first aspect.
In a third aspect, an embodiment of the present invention further provides a computer-readable storage medium, which stores a computer program, and when the computer program is executed by a processor, the computer program implements the method of any one of the above embodiments.
The invention provides a SIMO circuit control method, a display panel and a display device. Through the analysis of the load capacity of the display panel, the work mode which is suitable for the load capacity of the current display panel is selected for the SIMO circuit in the three work modes according to the load capacity of the display panel, so that the inductance charging and discharging scheme of the SIMO circuit is adjusted, the interference problem between inductance charging and discharging is improved, and the requirement of the SIMO circuit on the inductance specification is reduced. Meanwhile, the SIMO circuit can directly realize positive and negative voltage two-way output, so that the peripheral capacitance can be saved, the circuit architecture is simplified, and the production cost is reduced.
Drawings
FIG. 1 is a graph showing the relationship between the inductor current, the ELVDD voltage, and the ELVSS voltage during the charge/discharge cycle of a SIMO circuit of the prior art;
fig. 2 is a schematic structural diagram of a display device according to an embodiment of the present invention;
FIG. 3 is a schematic flow chart diagram of a SIMO circuit control method according to an embodiment of the present invention;
FIG. 4a is a schematic diagram of an SIMO circuit inductive charging-inductive positive voltage discharging according to an embodiment of the present invention;
FIG. 4b is a schematic diagram of an SIMO circuit comprising inductive charging and inductive negative voltage discharging according to an embodiment of the present invention;
FIG. 5 is a diagram illustrating the relationship between the inductor current, the ELVDD voltage and the ELVSS voltage of the SIMO circuit during the positive voltage charging and discharging period and the negative voltage charging and discharging period in the first operating mode according to the embodiment of the present invention;
FIG. 6 is a diagram illustrating the relationship between the inductor current, the ELVDD voltage, and the ELVSS voltage of the SIMO circuit during a single charge-discharge cycle in a second operating mode according to an embodiment of the present invention;
fig. 7 is a diagram illustrating the relationship between the inductor current, the ELVDD voltage, and the ELVSS voltage for a plurality of charge/discharge cycles of the SIMO circuit in the third operating mode according to an embodiment of the invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some structures related to the present invention are shown in the drawings, not all of them.
Also, unless explicitly described to the contrary, the word "comprise" and variations such as "comprises" or "comprising", will be understood to imply the inclusion of stated elements but not the exclusion of any other elements.
It should also be noted that references to "and/or" in embodiments of the invention are intended to include any and all combinations of one or more of the associated listed items. Various components are described in embodiments of the present invention with "first", "second", "third", and the like, but these components should not be limited by these terms. These terms are only used to distinguish one component from another. Also, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
While certain embodiments may be practiced differently, the specific process sequence may be performed differently than described. For example, two processes described consecutively may be performed at substantially the same time or in an order reverse to that described.
FIG. 1 is a diagram showing the relationship among the inductor current, the ELVDD voltage, and the ELVSS voltage during the charge-discharge cycle of a SIMO circuit of the prior art. Inductive current I L ELVDD voltage V ELVDD And an ELVSS voltage V ELVSS As shown in FIG. 1, a charge-discharge cycle includesThe three stages are respectively a charging stage (1), a positive pressure discharging stage (2) and a negative pressure discharging stage (3). Because the positive voltage discharging stage (2) and the negative voltage discharging stage (3) are adjacent, cross interference can be generated between the charging and discharging of the inductor, and the inductor L needs to meet the requirements of positive and negative currents at the same time, so that the requirement on the specification of the inductor (such as current parameters on the inductor) is higher. Therefore, the embodiment of the invention provides a control method of an SIMO circuit, a display panel and a display device, which can adjust an inductance charging and discharging scheme of the SIMO circuit, improve the interference problem between inductance charging and discharging and reduce the requirement of the SIMO circuit on the inductance specification.
Next, the SIMO circuit control method, the display device, and the technical effects thereof will be described in detail.
Fig. 2 is a schematic structural diagram of a display device according to an embodiment of the present invention. As shown in fig. 2, the display panel includes: SIMO circuit 20 and display panel 30, wherein an input terminal of SIMO circuit 20 is electrically connected to power supply chip 10, an output terminal of SIMO circuit 20 is electrically connected to display panel 30, and SIMO circuit 20 is used to supply power to display panel 30.
Specifically, SIMO circuit 20 includes a first switch 201, a second switch 202, an inductor L, a first diode D1, a second diode D2, a first capacitor C1, and a second capacitor C2. A first end of the first switch 201 is electrically connected to the power chip 10, a second end of the first switch 201 is equipotential to the first end of the first switch 201, and a third end of the first switch 201 is electrically connected to one end of the inductor L; the other end of the inductor L is electrically connected to the second end of the second switch 202; a first end of the second switch 202 is electrically connected with the power chip 10, and a third end of the second switch 202 is grounded; the output end of the first diode D1 is electrically connected with one end of the inductor L, and the input end of the first diode D1 is electrically connected with both the display panel 30 and one end of the first capacitor C1; the other end of the first capacitor C1 is grounded; the input end of the second diode D2 is electrically connected to the other end of the inductor L, and the output end of the second diode D2 is electrically connected to both the display panel 30 and one end of the second capacitor C2; the other end of the second capacitor C2 is grounded. The SIMO circuit 20 can supply the ELVDD voltage, the ELVSS voltage, and the AVDD voltage required by the display driver to the display panel 30.
Power supply chip 10 may be a Power Management Integrated Circuits (Power Management Integrated Circuits) that supplies Power to SIMO circuit 20.
In addition, the display device may further include a front camera and a sensor. The front camera and the sensor are correspondingly arranged below the display area of the display panel. Optionally, besides the front camera and the sensor, other devices, such as a gyroscope or an earphone, may be disposed below the display area.
The display panel may be any one of an Organic Light-Emitting Diode (OLED) display panel, an In-Plane Switching (IPS) display panel, a Twisted Nematic (TN) display panel, a Vertical Alignment (VA) display panel, electronic paper, a Quantum Dot Light Emitting (QLED) display panel, or a micro LED (micro Light Emitting Diode, μ LED) display panel, and the like, which is not particularly limited In the present invention. The light emitting mode of the display panel may be top emission, bottom emission, or both-side emission.
The display device provided by the embodiment of the invention can be applied to intelligent wearable equipment (such as an intelligent bracelet and an intelligent watch) and also can be applied to equipment such as an intelligent mobile phone, a tablet personal computer and a display.
Fig. 3 is a schematic flow chart illustrating a SIMO circuit control method according to an embodiment of the present invention. As shown in fig. 3, the SIMO circuit of the display panel shown in fig. 2 is controlled by the SIMO circuit control method including the following steps.
And S110, acquiring the load capacity of the display panel electrically connected with the SIMO circuit.
In one embodiment, the method of acquiring the load amount of the display panel electrically connected to the SIMO circuit in step S110 may include any one of the following two methods:
the method comprises the following steps: and acquiring the load capacity of the display panel in real time.
The method for acquiring the load of the display panel in real time can ensure that the working mode selected for the SIMO circuit is always the most suitable working mode for the current load condition, and ensure the product performance.
The method 2 comprises the following steps: and periodically acquiring the load capacity of the display panel according to a preset period.
Compared with the method 1, the method of periodically acquiring the load amount of the display panel can save part of resources. The selection of the preset period may be selected according to actual conditions, and the embodiment of the present invention is not particularly limited in this respect.
And S120, if the load of the display panel is smaller than or equal to a first preset threshold, controlling the SIMO circuit to work in a first working mode.
The load capacity of the display panel, namely the ratio of the actual load of the display panel to the total load of the display panel, can be expressed in percentage; the first mode of operation may also be referred to as a light load mode of operation. For example, the value of the first preset threshold is 30%, that is, when the load amount of the display panel is less than or equal to 30%, the SIMO circuit is controlled to operate in the first operating mode (light-load operating mode).
FIG. 4a is a schematic diagram of an SIMO circuit inductive charging-inductive positive voltage discharging according to an embodiment of the present invention; fig. 4b shows a schematic diagram of inductive charging-inductive negative voltage discharging of a SIMO circuit according to an embodiment of the present invention.
Specifically, the method for controlling the SIMO circuit to operate in the first operating mode in step S120 may include: and controlling the SIMO circuit to sequentially and circularly execute a positive voltage charging and discharging period and a negative voltage charging and discharging period, wherein the sum of charging and discharging time of the SIMO circuit in the positive voltage charging and discharging period is less than the total time of the positive voltage charging and discharging period, and the sum of charging and discharging time of the SIMO circuit in the negative voltage charging and discharging period is less than the total time of the negative voltage charging and discharging period.
Referring to fig. 4 a-4 b, fig. 5 is a graph showing the relationship among the inductor current, the ELVDD voltage, and the ELVSS voltage of the SIMO circuit during the positive voltage charging and discharging period and the negative voltage charging and discharging period in the first operation mode according to the embodiment of the invention. As shown in fig. 5, the positive voltage charging and discharging cycle includes three phases, which are a charging phase (1), a positive voltage discharging phase (2), and an idle phase; the negative-pressure charging and discharging cycle comprises three stages, namely a charging stage (1), a negative-pressure discharging stage (3) and an idle stage. In the first working mode, positive voltage charging and discharging periods and negative voltage charging and discharging periods alternately appear, and the positive voltage discharging period (2) and the negative voltage discharging period (3) are separated by the charging period (1) and the idle period, so that the problem of cross interference between inductance charging and discharging is solved.
In one embodiment, a method of controlling a SIMO circuit to perform positive voltage charge and discharge cycles may include: controlling SIMO circuit charging T 11 Time length and control the SIMO circuit to discharge to the display panel in positive voltage T 12 Duration, T 13 Entering a negative pressure charge-discharge cycle after the time is long;
similarly, the method for controlling the SIMO circuit to execute the negative voltage charge-discharge period can comprise the following steps: controlling SIMO circuit charging T 14 Time length and control the SIMO circuit to discharge T to the display panel 15 Duration, T 16 And entering a positive voltage charging and discharging period after the time is long.
Optionally, duration T 11 、T 12 、T 13 、T 14 、T 15 And T 16 Can be selected according to actual needs. E.g. T 11 ＝T 14 ，T 12 ＝T 15 ，T 13 ＝T 16 Therefore, the charging time length, the discharging time length and the idle time length of the positive-pressure charging and discharging period and the negative-pressure charging and discharging period are the same.
In one embodiment, the Current slope (Current slope) of the SIMO circuit during the charging phase (1), the positive voltage discharging phase (2) and the negative voltage discharging phase (3) is variable, so that the SIMO circuit is more suitable for different working scenarios.
And S130, if the load capacity of the display panel is greater than the first preset threshold and less than or equal to a second preset threshold, controlling the SIMO circuit to work in a second working mode.
The load amount of the display panel may be expressed in percentage; the second mode of operation may also be referred to as a mid-load mode of operation. For example, the first preset threshold is 30% and the second preset threshold is 60%, that is, when the load of the display panel is greater than 30% and less than or equal to 60%, the SIMO circuit is controlled to operate in the second operating mode (the intermediate load operating mode).
Specifically, the method for controlling the SIMO circuit to operate in the second operating mode in step S130 may include: and controlling the SIMO circuit to continuously execute a single charge-discharge period, wherein in the single charge-discharge period, the inductance of the SIMO circuit carries out positive voltage discharge and negative voltage discharge once, the single charge-discharge period comprises a positive voltage charge-discharge period and a negative voltage charge-discharge period, the duration of the positive voltage charge-discharge period is equal to the sum of the positive voltage charge duration and the positive voltage discharge duration, and the duration of the negative voltage charge-discharge period is equal to the sum of the negative voltage charge duration and the negative voltage discharge duration.
With continuing reference to fig. 4 a-4 b, fig. 6 is a graph illustrating the relationship between the inductor current, the ELVDD voltage, and the ELVSS voltage for a single charge-discharge cycle of the SIMO circuit in a second mode of operation, according to an embodiment of the present invention. As shown in fig. 6, the single charge-discharge cycle includes four phases, namely a charge phase (1), a positive-voltage discharge phase (2), a charge phase (1), and a negative-voltage discharge phase (3). In the second working mode, a single charge-discharge period continuously appears, and the positive-pressure discharge stage (2) and the negative-pressure discharge stage (3) are separated by the charge stage (1), so that the problem of cross interference between inductance charge and discharge is solved.
In one embodiment, the method for controlling the SIMO circuit to continuously perform a single charge-discharge cycle may comprise: controlling SIMO circuit charging T 21 Duration and control of positive voltage discharge T from SIMO circuit to display panel 22 A duration; controlling SIMO circuit charging T 23 Duration, and control of negative voltage discharge T from SIMO circuit to display panel 24 The length of time.
Optionally, duration T 21 、T 22 、T 23 And T 24 The size of (A) can be selected according to actual needs. E.g. T 21 ＝T 23 ，T 22 ＝T 24 Thus, the charging time and the discharging time of a single charging and discharging cycle are the same.
In one embodiment, the current slope of charging/discharging of the SIMO circuit in the charging phase (1), the positive voltage discharging phase (2) and the negative voltage discharging phase (3) is variable, so that the SIMO circuit is more suitable for different working scenes.
S140, if the load capacity of the display panel is larger than a second preset threshold value, controlling the SIMO circuit to work in a third working mode; the first preset threshold is smaller than the second preset threshold.
The load amount of the display panel may be expressed in percentage; the third mode of operation may also be referred to as a heavy duty mode of operation. For example, the second preset threshold is 60%, that is, when the load of the display panel is greater than 60%, the SIMO circuit is controlled to operate in the third operating mode (the heavy-load operating mode).
Specifically, the method for controlling the SIMO circuit to operate in the third operating mode in step S140 may include: and controlling the SIMO circuit to continuously execute a plurality of charge and discharge cycles, wherein in one plurality of charge and discharge cycles, the inductance of the SIMO circuit carries out N times of positive voltage discharge and N times of negative voltage discharge, the N times of positive voltage discharge are mutually continuous, the N times of negative voltage discharge are mutually continuous, N is more than or equal to 2, and N is a positive integer.
In an embodiment, the size of N may be selected according to actual needs. Typically, N =2 or N =3.
With continuing reference to fig. 4 a-4 b when N =2, fig. 7 is a graph illustrating the relationship among the inductor current, the ELVDD voltage, and the ELVSS voltage for a plurality of charge and discharge cycles of the SIMO circuit in the third operating mode according to an embodiment of the present invention. As shown in fig. 7, the multiple charging and discharging cycle includes eight stages, namely a charging stage (1), a positive voltage discharging stage (2), a charging stage (1), a negative voltage discharging stage (3), a charging stage (1), and a negative voltage discharging stage (3). In the third working mode, multiple charge-discharge cycles occur continuously, and in one multiple charge-discharge cycle, the load current is divided into two parts equally, so that the current on the inductor is reduced; and the positive voltage discharging stage (2) and the negative voltage discharging stage (3) are separated by the charging stage (1), so that the problem of cross interference between inductive charging and discharging is solved.
In one embodiment, the method for controlling the SIMO circuit to continuously perform a plurality of charge and discharge cycles may comprise: controlCharging T for SIMO circuit 31 Duration and control of positive voltage discharge T from SIMO circuit to display panel 32 A duration; controlling SIMO circuit charging T 33 Time length and control the SIMO circuit to discharge to the display panel in positive voltage T 34 A duration; controlling SIMO circuit charging T 35 Time length and control the SIMO circuit to discharge T to the display panel 36 A duration; controlling SIMO circuit charging T 37 Duration, and control of negative voltage discharge T from SIMO circuit to display panel 38 The length of time.
Optionally, duration T 31 、T 32 、T 33 、T 34 、T 35 、T 36 、T 37 And T 38 The size of (A) can be selected according to actual needs. E.g. T 31 ＝T 33 ＝T 35 ＝T 37 ，T 32 ＝T 34 ＝T 36 ＝T 38 Thus, the charging time and the discharging time of the multiple charging and discharging cycles are the same.
Similarly, when N =3, the multiple charging and discharging cycle includes twelve phases, which are a charging phase (1), a positive-pressure discharging phase (2), a charging phase (1), a negative-pressure discharging phase (3), a charging phase (1), and a negative-pressure discharging phase (3), respectively. When N =4, the multiple charge-discharge cycle includes sixteen phases, which are respectively a charge phase (1), a positive-pressure discharge phase (2), a charge phase (1), a negative-pressure discharge phase (3), a charge phase (1), and a negative-pressure discharge phase (3). And so on.
In one embodiment, the current slope of charging/discharging of the SIMO circuit in the charging phase (1), the positive voltage discharging phase (2) and the negative voltage discharging phase (3) is variable, so that the SIMO circuit is more suitable for different working scenes.
The embodiment of the invention provides a SIMO circuit control method, which is applied to a display panel and comprises the following steps: acquiring the load capacity of a display panel electrically connected with the SIMO circuit; if the load capacity of the display panel is smaller than or equal to a first preset threshold value, controlling the SIMO circuit to work in a first working mode; if the load capacity of the display panel is greater than a first preset threshold value and less than or equal to a second preset threshold value, controlling the SIMO circuit to work in a second working mode; if the load capacity of the display panel is larger than a second preset threshold value, the SIMO circuit is controlled to work in a third working mode; the first preset threshold is smaller than the second preset threshold. By analyzing the load capacity of the display panel and according to the load capacity of the display panel, the work mode which is suitable for the load capacity of the current display panel is selected for the SIMO circuit from the three work modes, so that the inductance charging and discharging scheme of the SIMO circuit is adjusted, the interference problem between inductance charging and discharging is improved, and the requirement of the SIMO circuit on the inductance specification is reduced. Meanwhile, the SIMO circuit can directly realize positive and negative voltage two-way output, so that the peripheral capacitance can be saved, the circuit architecture is simplified, and the production cost is reduced.
Embodiments of the present invention further provide a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the method provided in any embodiment of the present invention.
Computer storage media for embodiments of the invention may employ any combination of one or more computer-readable media. The computer readable medium may be a computer readable signal medium or a computer readable storage medium. The computer-readable storage medium may be, for example but not limited to: an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination thereof. Computer-readable storage media include (a non-exhaustive list): an electrical connection having one or more wires, a portable computer diskette, a hard disk, a Random Access Memory (RAM), a Read-Only Memory (ROM), an erasable programmable Read-Only Memory (EPROM), a flash Memory, an optical fiber, a portable Compact Disc Read-Only Memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing. In the context of the present invention, a computer readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device.
A computer readable signal medium may include a propagated data signal with computer readable program code embodied therein, for example, in baseband or as part of a carrier wave. Such a propagated data signal may take many forms, including, but not limited to, electro-magnetic, optical, or any suitable combination thereof. A computer readable signal medium may also be any computer readable medium that is not a computer readable storage medium and that can communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device.
Program code embodied on a computer readable medium may be transmitted using any appropriate medium, including but not limited to wireless, wireline, optical fiber cable, radio Frequency (RF), etc., or any suitable combination of the foregoing.
Computer program code for carrying out operations for aspects of the present disclosure may be written in any combination of one or more programming languages, including an object oriented programming language such as Java, smalltalk, C + +, ruby, go, and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The program code may execute entirely on the user's computer, partly on the user's computer, as a stand-alone software package, partly on the user's computer and partly on a remote computer or entirely on the remote computer or server. In the latter scenario, the remote computer may be connected to the user's computer through any type of Network, including a Local Area Network (LAN) or a Wide Area Network (WAN), or the connection may be made to an external computer (for example, through the internet using an internet service provider).
It will be clear to a person skilled in the art that the term user terminal covers any suitable type of wireless user equipment, such as a mobile phone, a portable data processing device, a portable web browser or a car mounted mobile station.
In general, the various embodiments of the invention may be implemented in hardware or special purpose circuits, software, logic or any combination thereof. For example, some aspects may be implemented in hardware, while other aspects may be implemented in firmware or software which may be executed by a controller, microprocessor or other computing device, although the invention is not limited thereto.
Embodiments of the invention may be implemented by a data processor of a mobile device executing computer program instructions, for example in a processor entity, or by hardware, or by a combination of software and hardware. The computer program instructions may be assembly instructions, instruction Set Architecture (ISA) instructions, machine-related instructions, microcode, firmware instructions, state setting data, or source code or object code written in any combination of one or more programming languages.
Any logic flow block diagrams in the figures of the present invention may represent program steps, or may represent interconnected logic circuits, modules, and functions, or may represent a combination of program steps and logic circuits, modules, and functions. The computer program may be stored on a memory. The memory may be of any type suitable to the local technical environment and may be implemented using any suitable data storage technology, such as, but not limited to, read Only Memory (ROM), random Access Memory (RAM), optical storage devices and systems (digital versatile disks, DVDs or CD disks), etc. The computer readable medium may include a non-transitory storage medium. The data processor may be of any type suitable to the local technical environment, such as but not limited to general purpose computers, special purpose computers, microprocessors, digital Signal Processors (DSPs), application Specific Integrated Circuits (ASICs), programmable logic devices (FGPAs), and processors based on a multi-core processor architecture.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims (10)

1. A method of controlling an SIMO circuit for supplying power to a display panel, the method comprising:
acquiring the load capacity of the display panel electrically connected with the SIMO circuit;
if the load capacity of the display panel is smaller than or equal to a first preset threshold value, controlling the SIMO circuit to work in a first working mode, wherein the first working mode is used for controlling the SIMO circuit to sequentially and circularly execute a positive voltage charging and discharging period and a negative voltage charging and discharging period;
if the load capacity of the display panel is greater than the first preset threshold and less than or equal to a second preset threshold, controlling the SIMO circuit to work in a second working mode, wherein the second working mode is used for controlling the SIMO circuit to continuously execute a single charge-discharge cycle;
if the load capacity of the display panel is greater than the second preset threshold, controlling the SIMO circuit to work in a third working mode, wherein the third working mode is used for controlling the SIMO circuit to continuously execute a plurality of charging and discharging cycles; wherein the first preset threshold is smaller than the second preset threshold.
2. The method of claim 1, wherein the obtaining the load of the display panel electrically connected to the SIMO circuit comprises:
acquiring the load capacity of the display panel in real time; alternatively, the first and second electrodes may be,
and periodically acquiring the load capacity of the display panel according to a preset period.
3. The method of claim 1, wherein the controlling the SIMO circuit to operate in the first mode of operation comprises:
the sum of charging and discharging time lengths of the SIMO circuit in the positive voltage charging and discharging period is smaller than the total time length of the positive voltage charging and discharging period, and the sum of charging and discharging time lengths of the SIMO circuit in the negative voltage charging and discharging period is smaller than the total time length of the negative voltage charging and discharging period.
4. The SIMO circuit control method of claim 3,
the controlling the SIMO circuit to perform a positive voltage charge-discharge cycle includes:
controlling the SIMO circuit to charge T 11 Duration, and controlling the SIMO circuit to discharge to the display panel at positive voltage 12 Duration, T 13 Entering the negative pressure charge-discharge cycle after the time is long;
the controlling the SIMO circuit to execute a negative voltage charge-discharge cycle includes:
controlling the SIMO circuit to charge T 14 Duration, and controlling the SIMO circuit to discharge T to the display panel 15 Duration, T 16 And entering the positive pressure charging and discharging period after the time is long.
5. The method of claim 1, wherein controlling the SIMO circuit to operate in a second mode of operation comprises:
in one single charge-discharge period, the inductance of the SIMO circuit carries out positive-pressure discharge and negative-pressure discharge once, the single charge-discharge period comprises a positive-pressure charge-discharge period and a negative-pressure charge-discharge period, the duration of the positive-pressure charge-discharge period is equal to the sum of the positive-pressure charge duration and the positive-pressure discharge duration, and the duration of the negative-pressure charge-discharge period is equal to the sum of the negative-pressure charge duration and the negative-pressure discharge duration.
6. The method of claim 5, wherein the controlling the SIMO circuit to perform a single charge-discharge cycle continuously comprises:
controlling the SIMO circuit to charge T 21 Duration, and controlling the SIMO circuit to discharge to the display panel at positive voltage 22 A duration;
controlling the SIMO circuit to charge T 23 Duration, and controlling the SIMO circuit to discharge T to the display panel 24 The length of time.
7. The method of claim 1, wherein the controlling the SIMO circuit to operate in a third mode of operation comprises:
in one multiple charging and discharging period, the inductor of the SIMO circuit carries out N times of positive voltage discharge and N times of negative voltage discharge, the N times of positive voltage discharge are mutually continuous, the N times of negative voltage discharge are mutually continuous, N is larger than or equal to 2, and N is a positive integer.
8. The SIMO circuit control method according to claim 7, wherein N =2 or N =3;
when N =2, the controlling the SIMO circuit to continuously perform a plurality of charge-discharge cycles includes:
controlling the SIMO circuit to charge T 31 Duration, and controlling the SIMO circuit to discharge to the display panel at positive voltage 32 A duration;
controlling the SIMO circuit to charge T 33 Duration, and controlling the SIMO circuit to discharge to the display panel at positive voltage 34 A duration;
controlling the SIMO circuit to charge T 35 Duration, and controlling the SIMO circuit to discharge T to the display panel 36 A duration;
controlling the SIMO circuit to charge T 37 Duration, and controlling the SIMO circuit to discharge T to the display panel 38 The length of time.
9. A display device, comprising a SIMO circuit and a display panel; the SIMO circuit is controlled by the SIMO circuit control method according to any one of claims 1 to 8.
10. A computer-readable storage medium storing a computer program, wherein the computer program, when executed by a processor, implements the SIMO circuit control method according to any one of claims 1 to 8.
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