CN113342105A - Power supply adjusting device and method of display panel and display device - Google Patents

Power supply adjusting device and method of display panel and display device Download PDF

Info

Publication number
CN113342105A
CN113342105A CN202110619777.6A CN202110619777A CN113342105A CN 113342105 A CN113342105 A CN 113342105A CN 202110619777 A CN202110619777 A CN 202110619777A CN 113342105 A CN113342105 A CN 113342105A
Authority
CN
China
Prior art keywords
output
current
power supply
paths
chip
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN202110619777.6A
Other languages
Chinese (zh)
Other versions
CN113342105B (en
Inventor
孙志松
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kunshan Govisionox Optoelectronics Co Ltd
Original Assignee
Kunshan Govisionox Optoelectronics Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Kunshan Govisionox Optoelectronics Co Ltd filed Critical Kunshan Govisionox Optoelectronics Co Ltd
Priority to CN202110619777.6A priority Critical patent/CN113342105B/en
Publication of CN113342105A publication Critical patent/CN113342105A/en
Application granted granted Critical
Publication of CN113342105B publication Critical patent/CN113342105B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
    • G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
    • G05F1/10—Regulating voltage or current
    • G05F1/46—Regulating voltage or current wherein the variable actually regulated by the final control device is dc
    • G05F1/56—Regulating voltage or current wherein the variable actually regulated by the final control device is dc using semiconductor devices in series with the load as final control devices
    • G05F1/561—Voltage to current 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
    • G09G3/22—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 using controlled light sources
    • G09G3/30—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 using controlled light sources using electroluminescent panels
    • G09G3/32—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 using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • G09G3/3208—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 using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
    • G09G2330/02—Details of power systems and of start or stop of display operation

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Automation & Control Theory (AREA)
  • Computer Hardware Design (AREA)
  • Theoretical Computer Science (AREA)
  • Control Of El Displays (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Dc-Dc Converters (AREA)

Abstract

The invention discloses a power supply adjusting device and method of a display panel and a display device. The power supply adjusting device includes: the power supply device comprises a power supply chip, a current detection unit and a control unit. The power supply chip comprises at least two output paths; the voltage types of the at least two output channels are the same; the current detection unit is used for detecting the output current of the power supply chip, and the output current is the sum of the currents of the at least two output channels; the control unit is electrically connected with the power chip and the current detection unit respectively; the control unit is used for adjusting the number of the output paths with the output signals in the power chip and/or switching the output paths according to the output current and the efficiency threshold current of the output paths with the output signals. The embodiment of the invention can improve the working efficiency of the power supply chip of the display panel.

Description

Power supply adjusting device and method of display panel and display device
Technical Field
The embodiment of the invention relates to the technical field of display, in particular to a power supply adjusting device and method of a display panel and a display device.
Background
With the continuous development of display technology, people have higher and higher requirements on display panels. Among them, the OLED display panel is widely used because of its advantages such as self-luminescence and high contrast. The normal display of the display module needs to provide Power supply signals such as ELVDD and ELVSS which are matched with the display brightness, so that a Power chip (Power IC) with appropriate parameters needs to be selected to meet the actual application requirements.
Among them, Power ICs of display devices with large load requirements (such as large-sized screens in foldable screens, notebook computers, and vehicle-mounted displays) usually include a plurality of output channels (phases) to meet the large load requirements. However, in practical use, Power ICs with multiple output channels have a problem of low operating efficiency.
Disclosure of Invention
The embodiment of the invention provides a power supply adjusting device and method of a display panel and a display device, and aims to improve the working efficiency of a power supply chip of the display panel.
In order to achieve the technical purpose, the embodiment of the invention provides the following technical scheme:
a power supply regulating device of a display panel, comprising:
the power supply chip comprises at least two output paths; the voltage types of the at least two output channels are the same;
the current detection unit is used for detecting the output current of the power supply chip, and the output current is the sum of the currents of the at least two output channels;
the control unit is electrically connected with the power chip and the current detection unit respectively; the control unit is used for adjusting the number of the output paths with the output signals in the power chip and/or switching the output paths according to the output current and the efficiency threshold current of the output paths with the output signals.
It can be seen from the foregoing technical solutions that the embodiments of the present invention provide a power supply adjusting apparatus for a display panel. The power supply adjusting device is provided with the current detecting unit and the control unit which are connected with the power supply chip, and can adjust the adjusting process of the output path in the power supply chip according to the output current of the power supply chip and the efficiency threshold current of the output path with the output signal. In the embodiment, the output mode of the power supply chip under different load conditions is considered, and the power consumption can be reduced as much as possible on the basis of providing the load requirements of the display panel under different working states.
Optionally, the voltage type is positive or negative;
the control unit is used for adjusting the number of positive voltage output paths with output signals in the power chip and/or switching the positive voltage output paths according to the output current and the efficiency threshold current of the output paths with the output signals;
and/or the control unit is used for adjusting the number of negative voltage output paths with output signals in the power chip and/or switching the negative voltage output paths according to the output current and the efficiency threshold current of the output paths with the output signals;
the positive pressure output passage and the negative pressure output passage are arranged to be adjusted separately, and effectiveness of adjusting power efficiency is improved.
Preferably, the full-load currents of at least two positive-voltage output channels are equal or unequal in magnitude;
and the full-load currents of at least two negative-voltage output channels are equal or unequal in magnitude.
Optionally, the control unit comprises:
the judging subunit is used for judging whether the working efficiency of the power supply chip meets an efficiency threshold value or not according to the output current and the efficiency threshold current of the output path with the output signal;
the control subunit is electrically connected with the judgment subunit and the power supply chip respectively; the control subunit is used for adjusting the number of the output paths with the output signals in the power chip and/or switching the output paths according to the output signals of the judging subunit.
Optionally, the power supply regulator further comprises:
the temperature detection unit is used for detecting the operating temperature of the power supply chip;
the control unit is electrically connected with the temperature detection unit and is also used for adjusting the number of the output paths with output signals in the power chip and/or switching the output paths according to the operating temperature.
In this embodiment, a temperature detection unit is introduced, and the physical condition of the power supply chip is taken into consideration in addition to the load change. When the operation temperature reaches the upper limit, even if the output current of the current output path meets the load requirement, the output path with higher load capacity is adjusted, and the normal operation and the service life of the power supply chip are prevented from being influenced by over-temperature.
Preferably, the temperature detecting unit includes: a contact temperature sensor or a non-contact temperature sensor;
the power supply chip is electrically connected with the control unit, and the power supply chip is electrically connected with the control unit;
the non-contact temperature sensor comprises a sensing end and an output end, the sensing end of the non-contact temperature sensor is arranged in the temperature radiation range of the power supply chip, and the output end of the non-contact temperature sensor is electrically connected with the control unit.
Optionally, the current detecting unit includes:
the current transformer comprises a sensing end and an output end; the sensing end of the current transformer and the output channel generate electromagnetic induction to generate induction current, and the output end of the current transformer is electrically connected with the control unit;
alternatively, the current detection unit includes:
the sampling resistor is connected between an output path of the power supply chip and a load in series;
the voltage detection subunit comprises a first detection end, a second detection end and an output end; the first detection end and the second detection end of the voltage detection subunit are respectively connected with two ends of the sampling resistor and used for collecting the voltage of the sampling resistor; and the output end of the voltage detection subunit is electrically connected with the control unit.
Accordingly, the present invention also provides a display device comprising a battery and a power regulating device as provided in any of the embodiments of the present invention; the battery is electrically connected with the power supply chip and used for supplying power to the power supply chip.
Correspondingly, the invention also provides a power supply adjusting method of the display panel, which comprises the following steps:
the current detection unit detects the output current of the power supply chip, wherein the output current is the sum of the currents of the at least two output channels;
and the control unit adjusts the number of the output paths with the output signals in the power chip and/or switches the output paths according to the output current and the efficiency threshold current of the output paths with the output signals.
Optionally, the efficiency threshold current comprises a first current switching point and a second current switching point;
the adjusting the number of output paths with output signals in the power chip according to the output current and the efficiency threshold current of the output paths with output signals comprises:
if the output current is in a rising stage and is greater than the first current switching point, increasing the number of the output paths with output signals;
if the output current is in a descending stage and the output current is smaller than the second current switching point, reducing the number of the output paths with output signals;
wherein the second current switching point is less than or equal to the first current switching point;
preferably, the first current switching point is determined by a full load current of the output path having an output signal; the second current switching point is determined by a full load current of the output path having a portion of the output signal.
Optionally, the efficiency threshold current comprises a first current switching point and a second current switching point;
at least two of the output paths are not equal in full load current magnitude, and switching the output paths according to the output current and an efficiency threshold current of the output path having an output signal includes:
if the output current is in a rising stage and the output current is larger than the first current switching point, switching the output path with the current output signal into the output path with larger full-load current;
if the output current is in a descending stage and the output current is smaller than the second current switching point, switching the output path with the current output signal into the output path with smaller full-load current;
wherein the second current switching point is less than or equal to the first current switching point.
Optionally, the power supply regulation method further includes:
the temperature detection unit detects the operating temperature of the power supply chip;
the control unit adjusts the number of the output paths with output signals in the power supply chip and/or switches the output paths according to the operation temperature;
preferably, adjusting the number of the output paths having output signals in the power chip and/or switching the output paths according to the operating temperature includes:
and if the operation temperature reaches the upper limit of the operation of the power supply chip, increasing the number of the output paths with the output signals, or switching the output paths with the current output signals into the output paths with larger full-load current.
The power supply adjusting device of the display panel provided by the embodiment of the invention is provided with the current detecting unit and the control unit which are connected with the power supply chip, and can realize the adjusting process of adjusting the number of output paths with output signals in the power supply chip and/or switching the output paths according to the output current of the power supply chip and the efficiency threshold current of the output paths with the output signals. In the embodiment, the output mode of the power supply chip under different load conditions is considered, and the power consumption can be reduced as much as possible on the basis of providing the load requirements of the display panel under different working states. Specifically, the required load current of the display panel is different in the display modes such as different pictures, different brightness modes and different display area sizes, when the load current is smaller, the control unit meets the load requirement of the display panel through the output path with smaller full load capacity by closing an unnecessary output path or switching the output path with smaller full load current, and therefore circuit loss is reduced. Therefore, compared with the prior art, the embodiment of the invention can improve the working efficiency of the power supply chip of the display panel.
Drawings
Fig. 1 is a schematic structural diagram of a power supply adjusting device of a display panel according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of another power supply adjusting device for a display panel according to an embodiment of the present invention;
fig. 3 is a schematic flowchart illustrating a power adjustment method for a display panel according to an embodiment of the present invention;
FIG. 4 is a flowchart illustrating a power adjustment method for a display panel according to another embodiment of the present invention;
FIG. 5 is a flowchart illustrating a power adjustment method for a display panel according to another embodiment of the present invention;
FIG. 6 is a flowchart illustrating a power adjustment method for a display panel according to another embodiment of the present invention;
FIG. 7 is a diagram illustrating a relationship between current switching points according to an embodiment of the present invention;
fig. 8 is a flowchart illustrating a power adjustment method for a display panel according to another embodiment of the present 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 of the structures related to the present invention are shown in the drawings, not all of the structures.
As described in the background art, the Power IC of the plurality of output channels has a problem of low operation efficiency. The inventor researches and finds that in the Power IC with a large load demand, a plurality of output channels are generally included, and the plurality of output channels simultaneously supply Power to the load so as to meet the large load demand. However, in the process of operating the display panel, different frames, different brightness modes, partial display, and the like are displayed, so the required load current is different in magnitude and has a large difference. For example, the full load current of each output channel is 1A, when the brightness of the display screen is high, the actual output current of each output channel is 800mA, the loss in the Power IC is small, and the efficiency is high; when the brightness of the display picture is low, the actual output current of each output channel is 300mA, the loss inside the Power IC is large, and the efficiency is low. Therefore, the Power IC with a plurality of output channels has the problem of low working efficiency.
Based on the above research, the embodiment of the invention provides a power supply adjusting device for a display panel. Fig. 1 is a schematic structural diagram of a power supply adjusting device of a display panel according to an embodiment of the present invention. Referring to fig. 1, the power supply adjusting apparatus includes: a power chip 10, a current detection unit 20 and a control unit 30. The power chip 10 includes at least two output paths; the voltage types of at least two output paths are the same; the current detecting unit 20 is configured to detect an output current of the power chip, where the output current is a sum of currents of at least two output paths; the control unit 30 is electrically connected with the power chip 10 and the current detection unit 20 respectively; the control unit 30 is configured to adjust the number of output paths having output signals in the power chip 10 and/or switch the output paths according to the output current and the efficiency threshold current of the output paths having output signals.
The power chip 10 supplies power to a subsequent load through its output path, and the output current detected by the current detecting unit 20 is the load current. The sum of the output currents of the at least two output paths is the sum of the currents provided by the output paths with the current output signals, and the current provided by the output path without the current output signals can be recorded as 0. The efficiency threshold current is a judgment basis for judging whether the current output state meets the optimal efficiency, and can also be called as a current switching point, and the selection of the efficiency threshold current is various and can be adjusted according to practical application. For example, when the current is in the ramp-up phase, the efficiency threshold current is the sum of the full load currents of the output paths with the output signals, or slightly less than the sum of the full load currents of the output paths with the output signals. When the current is in a descending stage, the efficiency threshold is the sum of the full load currents of a part of output paths with output signals, or is slightly smaller than the sum of the full load currents of a part of output paths with output signals. Wherein the proportion slightly smaller than can be set as required.
For example, the adjusting process of the power supply adjusting device may include:
the current detection unit 20 detects the output current of the power chip 10. After obtaining the output current, the control unit 30 adjusts the output path of the power chip 10 according to the adjustment strategy.
The adjustment strategy of the control unit 30 includes:
1) if the full load currents of the output paths in the power chip 10 are equal, the number of the output paths with output signals in the power chip 10 is adjusted according to the output currents and the efficiency threshold currents of the output paths with output signals.
If the output current is smaller than the efficiency threshold current of the output path with the output signal and the load requirement can still be ensured after the number of the output paths is reduced, the unnecessary output paths are closed, the number of the output paths with the output signal is reduced, and therefore the switching loss is reduced, and the overall working efficiency of the power supply chip is improved.
2) If the full-load currents of the at least two output paths are not equal, adjusting the number of the output paths with the output signals in the power chip and/or switching the output paths according to the output currents and the efficiency threshold currents of the output paths with the output signals.
The control method for the number of output channels is the same as the first case, and is not described herein again.
Switching the output path according to the output current can be understood as:
and if the output current is smaller than the efficiency threshold current of the current output path with the output signal and the load requirement can still be ensured after the output path with smaller full load capacity is switched, switching the output path with smaller full load capacity. The full-load capacity represents the sum of output currents of all output paths with signal output in a full-load current output state, and specifically, when two output paths in the power chip have output signals, the full-load capacity is the sum of the output currents of the two output paths in the full-load current output state. Generally, the greater the number of output paths with signal output, the greater the full load capability. The switching to the output path with the smaller full capacity may be to another output path that does not currently have a signal output. For example, the power chip has two output paths, the full load current of the first output path is 1A, the full load current of the second output path is 2A, the current power chip is the current output of the second output path, and no signal is output from the first output path. If the output current is detected to be only 500mA, the first output channel can be switched to output current. The switching to the output path with the smaller full capacity may be a combination of a part of the output paths currently outputting and a part of the output paths currently not outputting signals. For example, the power supply chip has three output paths, the full load current of the first output path is 0.5A, the full load current of the second output path is 1A, the full load current of the third output path is 1.5A, the current power supply chip outputs current for the second output path and the third output path, and no signal is output in the first output path. If the output current is detected to be 1.8A, the first output path and the third output path can be switched to output currents.
The power supply adjusting device of the display panel provided by the embodiment of the invention is provided with the current detecting unit 20 and the control unit 30 which are connected with the power supply chip 10, and can realize the adjusting process of adjusting the number of output paths with output signals in the power supply chip 10 and/or switching the output paths according to the output current of the power supply chip 10 and the efficiency threshold current of the output paths with output signals. In the embodiment, the output mode of the power chip 10 under different load conditions is considered, and the power consumption can be reduced as much as possible on the basis of providing the load requirements of the display panel under different working states. Specifically, the required load current of the display panel in the display modes of different pictures, different brightness modes, different display area sizes, and the like is different, and when the load current is smaller, the control unit 30 meets the load requirement of the display panel with the output path with smaller full load capacity by closing an unnecessary output path or switching the output path with smaller full load current, thereby reducing the circuit loss. Therefore, the embodiment of the invention can improve the working efficiency of the power chip 10 of the display panel. Fig. 2 is a schematic structural diagram of another power supply adjusting device for a display panel according to an embodiment of the present invention, and referring to fig. 2, a power chip 10 in the display panel may be powered by a battery 50 equipped in the display device; the power supply chip 10 may supply a power supply signal to the load 60. The pixel cell is an important component of the load 60, and the positive voltage power signal (ELVDD) and the negative voltage power signal (ELVSS) are usually required for normal operation of the pixel cell.
On the basis of the above embodiments, optionally, the voltage type of the output path is positive voltage or negative voltage. The positive voltage output path outputs a positive voltage power signal ELVDD, and the negative voltage output path outputs a negative voltage power signal ELVSS. Accordingly, the control process of the control unit 30 includes: adjusting the number of positive voltage output paths with output signals in the power chip 10 and/or switching the positive voltage output paths according to the output current and the efficiency threshold current of the output paths with the output signals; and/or adjusting the number of negative voltage output paths with output signals in the power chip 10 and/or switching the negative voltage output paths according to the output current and the efficiency threshold current of the output paths with output signals. The embodiment of the invention is provided with the positive pressure output channel and the negative pressure output channel which are separately regulated, thereby being beneficial to improving the effectiveness of regulating the power supply efficiency.
The number of positive voltage output channels and the number of negative voltage output channels in the power chip 10 may be set respectively, so as to meet different requirements of the load for positive voltage and negative voltage. Optionally, the number of positive pressure output passages is at least two, and/or the number of negative pressure output passages is at least two. Wherein the full load currents of the at least two positive voltage output paths are equal or unequal in magnitude; the full-load currents of the at least two negative-voltage output channels are equal or unequal in magnitude. The setting can be specifically performed according to actual requirements, and is not limited here. For example, the power chip includes at least two positive voltage output paths, and the full load current of each positive voltage output path is equal in magnitude, and the efficiency can be improved by adjusting the number of positive voltage output paths with output signals. For another example, the power chip includes at least two negative voltage output paths, and the full load current of each negative voltage output path is equal in magnitude, and the efficiency can be improved by adjusting the number of negative voltage output paths having output signals. For another example, the power chip includes at least two negative voltage output paths and at least two positive voltage output paths, and the full-load current of each negative voltage output path is equal in magnitude, and the full-load current of each positive voltage output path is equal in magnitude, and the number of the positive voltage output paths and the number of the negative voltage output paths having output signals can be adjusted at the same time to improve the efficiency. For another example, the power chip includes at least two positive voltage output paths, and the full load current of each positive voltage output path is not equal, so that the efficiency can be improved by switching the positive voltage output paths with output signals, and/or the number of the positive voltage output paths with output signals can be adjusted. For another example, the power chip includes at least two negative voltage output paths, and the full load currents of the negative voltage output paths are not equal, so that the efficiency can be improved by switching the positive voltage output paths with output signals, and/or the number of the negative voltage output paths with output signals can be adjusted. For another example, the power chip includes at least two negative voltage output paths and at least two positive voltage output paths, and the full load current of each negative voltage output path is not equal, and the full load current of each positive voltage output path is not equal, and the positive voltage/negative voltage output paths with output signals can be switched at the same time to improve the efficiency, and/or the number of the positive voltage/negative voltage output paths with output signals is adjusted to improve the efficiency.
The control unit 30 can adjust both the positive pressure output path and the negative pressure output path, so as to better satisfy the power supply requirement of the load 60 and optimize the efficiency. Alternatively, the control unit 30 may adjust only the positive pressure output path, or only the negative pressure output path, thereby simplifying the control logic. The positive pressure output channel is controlled by the positive pressure output circuit, the negative pressure output channel is controlled by the negative pressure output circuit, and the topology of the negative pressure output circuit determines that the current magnitude of the negative pressure output channel has a larger influence on the efficiency, so that the control unit 30 is arranged to adjust only the negative pressure output channel, and the efficiency can be optimized to the greatest extent on the basis of simplifying the control logic.
On the basis of the above embodiments, the current detecting unit 20 may have various configurations, and some of them will be described below, but the invention is not limited thereto.
In one embodiment, the current detection unit 20 optionally includes: a current transformer. The current transformer comprises a sensing end and an output end; the sensing end of the current transformer and the output path generate electromagnetic induction to generate an induced current, and the output end of the current transformer is electrically connected with the control unit 30.
The current transformers may be multiple ones, and are respectively disposed on the outlet connection lines of the output paths of the power chip 10 to respectively detect the currents provided by the output paths, so as to ensure the accuracy of current detection. The induced currents generated by the plurality of current transformers are summed in the control unit 30 to obtain the output current of the power chip 10. Alternatively, the number of the current transformers is one, and the current transformers are arranged at the incoming line end (for example, a power line) of the load 60, and the induced current generated by the current transformers is the output current of the power chip 10, so as to reduce the operation process of the control unit 30.
In another embodiment, the current detecting unit 30 optionally includes: a sampling resistor and a voltage detection subunit. Wherein, the sampling resistor is connected in series between the output path of the power chip 10 and the load; the voltage detection subunit comprises a first detection end, a second detection end and an output end; the first detection end and the second detection end of the voltage detection subunit are respectively connected with two ends of the sampling resistor and used for collecting the voltage of the sampling resistor; the output terminal of the voltage detection subunit is electrically connected to the control unit 30. Compared with a current transformer, the loss can be reduced and the cost can be reduced by using the sampling resistor to detect the current.
With continued reference to fig. 2, on the basis of the foregoing embodiments, optionally, the power supply adjusting apparatus further includes: a temperature detection unit 40. The temperature detecting unit 40 is used for detecting the operating temperature of the power supply chip; the control unit 30 is electrically connected to the temperature detecting unit 40, and the control unit 30 is further configured to adjust the number of output paths having output signals in the power chip and/or switch the output paths according to the operating temperature.
Among them, the output path of the control unit 30 according to the operation temperature adjusting power chip 10 can be understood as:
if the operation temperature reaches the upper limit of the operation of the power chip 10, the number of output paths with output signals is increased, or the current output path with output signals is switched to an output path with larger full load current, so as to reduce the current provided by each output path, thereby relieving the heating phenomenon and reducing the temperature of the power chip 10.
In the embodiment, the temperature detecting unit 40 is introduced, and the physical condition of the power chip 10 is considered in addition to the load variation. For example, the priority of temperature regulation is set higher than the priority of output current regulation in the control unit 30; when the operation temperature reaches the upper limit, even if the output current of the current output path meets the load requirement, the output path with higher load capacity is adjusted, so that the normal operation and the service life of the power supply chip 10 are prevented from being influenced by the over-temperature.
In addition to the above embodiments, there are various optional configurations of the temperature detecting unit 40, and some of them will be described below, but not limited to the invention.
In one embodiment, the temperature detecting unit 40 optionally includes: a contact temperature sensor. The contact temperature sensor includes a sensing end and an output end, the sensing end is in contact with the power chip 10 for sensing, and the output end is electrically connected to the control unit 30. The sensing end of the contact temperature sensor needs to ensure good contact with the power chip 10 to ensure the accuracy of temperature detection.
In another embodiment, the temperature detection unit 40 optionally comprises a non-contact temperature sensor. The non-contact temperature sensor comprises a sensing end and an output end, the sensing end is arranged in the temperature radiation range of the power supply chip, and the output end is electrically connected with the control unit. The sensing end of the non-contact temperature sensor does not need to be in contact with the power supply chip 10, and the arrangement position of the non-contact temperature sensor is more flexible.
With continued reference to fig. 2, on the basis of the above embodiments, optionally, the control unit 30 includes: a judgment subunit 310 and a control subunit 320. The judging subunit 310 is configured to perform various comparison and judgment steps in the control unit 30; the control subunit 320 is electrically connected to the judging subunit 310 and the power chip 10, respectively, and is configured to adjust the number of output paths having output signals in the power chip 10 and/or switch the output paths according to the output signals (judgment results) of the judging subunit 320.
The determining subunit 310 may be electrically connected to the current detecting unit 20, and configured to determine whether the working efficiency of the power chip 10 satisfies an efficiency threshold according to the output current and an efficiency threshold current of an output path having an output signal. Determining whether the operating efficiency of the power supply chip 10 satisfies the efficiency threshold may include: and judging whether the output current is smaller than the efficiency threshold current of the output path with the output signal currently. In addition, the determining subunit 310 may be further electrically connected to the temperature detecting unit 40, and accordingly, determining whether the working efficiency of the power chip 10 satisfies the efficiency threshold may further include: it is judged whether or not the operation temperature reaches the operation upper limit temperature of the power supply chip 10.
The embodiment of the invention also provides a display device which comprises the power supply adjusting device provided by any embodiment of the invention and has corresponding beneficial effects. The power supply regulating device can be contained in the display panel, and the display device can be further provided with a battery which is electrically connected with the power supply chip in the power supply regulating device and used for supplying power to the power supply chip.
The embodiment of the invention also provides a power supply adjusting method of the display panel, which is suitable for the power supply adjusting device provided by any embodiment of the invention and has corresponding beneficial effects.
Fig. 3 is a schematic flowchart of a power adjustment method of a display panel according to an embodiment of the present invention.
Referring to fig. 3, the power supply adjusting method includes:
s110, the current detection unit detects the output current of the power supply chip, and the output current is the sum of the currents of at least two output channels.
The sum of the output currents of the at least two output paths is the sum of the currents provided by the output paths with the current output signals, and the current provided by the output path without the current output signals can be recorded as 0.
And S120, the control unit adjusts the number of output paths with output signals in the power chip and/or switches the output paths according to the output current and the efficiency threshold current of the output paths with the output signals.
Wherein, for example, the efficiency threshold current of the output path with the output signal can be the sum of the full load currents of all or part of the output paths with the output signal; or a set value less than the sum of the full load currents of all output paths having an output signal. The output path of the power supply chip may include a positive voltage output path and/or a negative voltage output path. When the output channels of the power chip comprise the positive-pressure output channel and the negative-pressure output channel, the number of the two output channels can be set according to actual requirements, and the number of at least one of the output channels is at least two. Correspondingly, the control unit respectively adjusts the two output paths according to the output current. Illustratively, the power chip may include 1 positive voltage output path and at least two negative voltage output paths therein; the control unit only regulates the negative pressure output passage at this time. Or, the power chip may include at least two positive voltage output paths and at least two negative voltage output paths; in this case, the control unit may select to adjust only the positive pressure output passage, only the negative pressure output passage, or both the positive pressure output passage and the negative pressure output passage as needed.
The power supply adjusting method of the display panel provided by the embodiment of the invention can realize the adjusting process of adjusting the number of output paths with output signals in the power supply chip and/or switching the output paths according to the output current of the power supply chip and the efficiency threshold current of the output paths with the output signals. In the embodiment, the output mode of the power chip under different load conditions is considered, and the load requirement of the display panel can be met by the output path with smaller full load capacity on the basis of providing the load requirement of the display panel under different working states, so that the circuit loss is reduced, and the working efficiency of the power chip of the display panel is improved.
In each of the above embodiments, the number of adjustment output paths and/or the switching point at which the output paths are switched may be stored in the power supply chip in advance, and for example, a switching point at which one output path output is switched to two output paths, a switching point at which two output paths output is switched to three output paths output, or the like may be stored in the power supply chip. Optionally, the adjustment may be performed dynamically during the execution process, and some of them will be described below, but not limiting the invention.
Fig. 4 is a flowchart illustrating another power adjustment method for a display panel according to an embodiment of the present invention. Referring to fig. 4, in one embodiment, optionally, the adjustment strategy includes:
s210, obtaining efficiency threshold current of an output path with an output signal in the power supply chip and output current of the power supply chip.
The efficiency threshold current of the output path with the output signal can be determined according to the following rule, and whether the sum of full-load currents of the output path with the output signal is larger than the output current after the number of the output paths is reduced is judged, so that the load requirement can be still met after the number of the output paths is reduced. For example: when 5 output paths in the current power chip have output signals, the efficiency threshold current of the output paths can be set to be the sum of full-load currents of 4 output paths; or set to slightly less than the sum of the full load currents of the 4 output paths. Then, when the output current is less than the efficiency threshold current, it can be reduced to 4 output paths for output.
And the specific output paths with output signals can be obtained through the control strategy of the previous control period, so that the number of the output paths with the output signals is determined. Or, the current detection unit can detect the sum of the currents of the output paths, that is, the output current of the power chip; the current of each output path can be detected separately, and the number of output paths with output signals can be acquired by detecting the output paths with output signals, for example, if the output current of a certain output path is detected to be 0, no output signal of the output path is obtained. The full load current of each output path can be stored in the control unit in advance, and each output path has a respective number; then the control unit can obtain the corresponding full load current according to its number. The output current is obtained by the detection of the current detection unit at the output path of the power chip or the incoming line end of the load; the control unit can read the output current through the current detection unit.
S220, judging whether the output current is smaller than the efficiency threshold current or not; if yes, go to S230; otherwise, the adjustment is ended.
And S230, reducing the number of output paths with output signals.
The steps give out the regulating strategy of regulating the number of the output paths by the control unit according to the output current, and the regulating strategy can be suitable for the condition that the full-load currents of at least two output paths are equal in magnitude and the condition that the full-load currents of at least two output paths are not equal in magnitude.
Fig. 5 is a flowchart illustrating a power adjustment method for a display panel according to another embodiment of the present invention. Referring to fig. 5, in one embodiment, optionally, the adjustment strategy includes:
s310, obtaining efficiency threshold current of an output path with an output signal in the power supply chip and output current of the power supply chip.
The efficiency threshold current of the output path can be determined according to the following rule, and whether the sum of full load currents of the output path with the current signal output is larger than the output current after the output path with the current signal output is switched to the output path with the smaller full load capacity is judged, so that the load requirement can be still met after the output path with the smaller full load capacity is switched. Wherein, the full load capacity represents the sum of output currents of all output paths with signal output in a full load current output state. An output path with smaller full capacity may refer to another output path that does not currently have a signal output; or a combination of a portion of the output paths that are currently outputting and a portion of the output paths that do not currently have a signal output.
S320, judging whether the output current is smaller than the efficiency threshold current or not; if so, S330 is executed, otherwise, the adjustment is ended. S330, switching to an output path with smaller full capacity.
The steps give out the regulating strategy of the control unit for switching the output paths according to the output current, and the regulating strategy can be suitable for the condition that the full-load currents of at least two output paths are equal in magnitude and the condition that the full-load currents of at least two output paths are not equal in magnitude.
On the basis of the above embodiments, optionally, the control unit may obtain and store a series of current switching points according to the number of output paths of the power chip and the full-load current. Therefore, in the adjusting process, the control unit does not need to acquire the number of output paths and full load current, and only needs to adjust according to the output current and the current switching point of the power supply chip, so that the operation process is reduced.
On the basis of the above embodiments, optionally, the adjustment strategy of the control unit may be set according to two conditions, namely equal and unequal full-load currents of at least two output paths, respectively. In the following, the possible adjustment strategies in the two cases are described separately, but not as a limitation of the invention.
In one embodiment, optionally, the full load currents of at least two output paths are equal in magnitude. That is to say, the full load capacity of each output channel in the power chip is equal, and if the full load capacity of the current output channel is not suitable for the load requirement, the full load capacity must be adjusted by increasing or decreasing the number of the output channels, and there is no scheme for switching other output channels. That is, the adjustment strategy is: and adjusting the number of output paths with output signals in the power supply chip according to the output current. This strategy is illustrated below by several specific examples.
Fig. 6 is a flowchart illustrating a power adjustment method for a display panel according to another embodiment of the present invention. Referring to fig. 6, in one embodiment, optionally, the efficiency threshold current comprises a first current switching point and a second current switching point; the adjustment strategy comprises the following steps:
and S410, acquiring the output current of the power supply chip.
S420, judging whether the change trend of the output current is in an ascending stage or a descending stage; if the variation trend of the output current is in the rising stage, executing S430; if the variation trend of the output current is in the descending stage, S450 is executed.
The power supply chip can be more finely adjusted by respectively considering two modes of the output current in a rising stage and a falling stage. Wherein, the rising phase refers to detecting that the output current is increasing; the falling phase means that the output current is detected to be decreasing. For example, the variation trend of the output current may be determined by comparing the output current of the last control period with the output current of the current control period. If the output current of the current control period is larger than the output current of the previous control period, judging that the output current is in a rising stage; and if the output current of the current control period is smaller than the output current of the previous control period, judging that the output current is in a descending stage.
S430, judging whether the output current is larger than a first current switching point; if yes, go to S440; otherwise, the adjustment is ended.
Wherein the first current switching point is determined by a full load current of the output path. Illustratively, the power supply chip comprises n output paths, then k first current switching points can be set according to requirements, and k is greater than or equal to 1 and less than or equal to n-1. When setting k to n-1, which is equivalent to setting a first current switching point every time an output path is added, fine adjustment can be achieved.
Exemplarily, to set n-1 first current switching points; the 1 st to the n-1 st first current switching points are increased in sequence as an example; the step can be that whether the output current is larger than the first current switching point or not is sequentially judged in a reverse order until the output current is judged to be larger than the ith first current switching point; i is more than or equal to 1 and less than or equal to n-1. In this case, the minimum number of output channels that can meet the load demand is i + 1. For example, when n is 3 and k is 2, the power supply chip includes three output paths, and when one output path having an output signal is adjusted to two, the 1 st first current switching point is needed; when the output paths with output signals are adjusted from two to three, the 2 nd first current switching point is needed.
S440, increasing the number of output paths with output signals.
S450, judging whether the output current is smaller than a second current switching point or not; if yes, go to S460; otherwise, the adjustment is ended.
Wherein the second current switching point is determined by a full load current of the output path. Illustratively, the power supply chip comprises n output paths, then k second current switching points can be set according to requirements, and k is greater than or equal to 1 and less than or equal to n-1.
Exemplarily, to set n-1 second current switching points; the 1 st to the n-1 st second current switching points are increased in sequence as an example; the step can be that whether the output current is smaller than the second current switching point or not is judged in sequence until the output current is judged to be smaller than the jth second current switching point; j is more than or equal to 1 and less than or equal to n-1. At this time, the minimum number of output channels that can meet the load demand is j. For example, when n is 3 and k is 2, the power supply chip includes three output paths, and when two output paths with output signals are adjusted to be one, the 1 st second current switching point is needed; when the output path with the output signal is adjusted from three to two, the 2 nd second current switching point is needed.
And S460, reducing the number of output channels with output signals.
The steps respectively consider two modes of the output current in a rising stage and a falling stage, and provide the regulating strategies in the two modes.
On the basis of the above embodiments, optionally, the second current switching point is smaller than the first current switching point, so as to prevent the situation that the current switching points in the two stages are too close to cause the switching of the output path back and forth, which is beneficial to the stability of the output of the power chip. Here, it should be noted that there are a plurality of output paths of the power supply chip, and then there may be a plurality of first current switching points, and a plurality of second current switching points. However, after the output current and the output path with the signal output are determined, the corresponding first current switching point and the second current switching point are in one-to-one correspondence, and the first current switching point is larger than the second current switching point corresponding to the first current switching point. For example, the power chip includes an output path a, an output path B, and an output path C, and the full load current of each output path is 1A, when the output current is 1.6A and is in the rising stage, 2 output paths need to be switched to 3 output paths, and a first current switching point is adopted, and the first current switching point may be set to 1.8A. When the output current is 1.6A and in the descending stage, 3 output channels need to be switched to 2 output channels, and a second current switching point is adopted, and the second current switching point can be set to be 1.5A. The second current switching point corresponds to the first current switching point, and the second current switching point is smaller than the first current switching point.
Fig. 7 is a relationship diagram of a current switching point according to an embodiment of the present invention. Referring to fig. 7, on the basis of the above embodiments, alternatively, taking an example of setting one first current switching point and one second current switching point, the first current switching point Ia represents a current switching point of the output current at the rising stage; the second current switching point Ib represents the current switching point of the output current during the falling phase. The second current switching point Ib is smaller than the first current switching point Ia, so that a certain interval is reserved between the current switching points of the upper and lower output stages in the two modes, the situation that the output path is switched back and forth due to too close current switching points of the two stages is prevented, and the stability of the output of the power supply chip is facilitated.
Illustratively, the power chip comprises an output path A, an output path B and an output path C, the full load current of each output path is 1A, the current of all three output paths has signal output, the sum of the full load currents is 3A, but the current of each output path is smaller, the efficiency is lower, the efficiency is 0.5A, and the sum of the currents is 1.5A, so that the number of the output paths can be reduced. If the first current switching point and the second current switching point are both set to be 1.5A, the output path C is controlled not to output signals, and only the output path A and the output path B output signals. However, in practical applications, the load current changes not steadily, for example, in the last control period, the load current is 1.5A, and the output path C does not output a signal; in the next control period, the load current is 1.6A, and the output path C outputs a signal again, so that the stability of the output voltage is affected to some extent by the repetition.
In the embodiment of the present invention, the second current switching point is set to be smaller than the first current switching point, for example, the first current switching point is 1.8A, the second current switching point is 1.5A, all the current three output paths have signal outputs, if the current of each output path is smaller, all the current is 0.6A, the sum of the currents is 1.8A, and is larger than the second current switching point, still three output paths output. And when the sum of the currents is reduced to be less than 1.5A, controlling the output channel C not to output signals and only outputting the signals through the output channel A and the output channel B. If the load current increases to 1.6A in the next control cycle, the output current still passes through the output path a and the output path B because the first current switching point is not reached, and the output path C is enabled again until the load current increases to more than 1.8A. Therefore, the embodiment of the invention is beneficial to avoiding the situation that the output path is switched back and forth and is beneficial to the stability of the output of the power chip.
On the basis of the above embodiments, optionally, the first current switching point is determined by a full load current of an output path having an output signal; the second current switching point is determined by the full load current of the output path with a portion of the output signal. Illustratively, the power chip comprises an output path A, an output path B and an output path C, and the full load current of each output path is 1A, the current of all three output paths has signal output, the sum of the full load currents is 3A, but the current of each output path is small, the efficiency is low, and is 0.6A, and the sum of the currents is 1.8A, so that the number of the output paths can be reduced, but whether switching can be carried out needs to be determined by the sum of the full load currents of the output path A and the output path B, the sum of the full load currents of the output path B and the output path C, or the sum of the full load currents of the output path A and the output path C. That is, the second current switching point is determined by the full load current of the output path with a portion of the output signal. If the current is that the output path A and the output path B have signal output, the sum of the full-load currents is 2A, but the currents of the output paths are larger and are 0.9A, and the sum of the currents is 1.8A; whether the number of output paths needs to be increased or not can be set according to needs, but the first current switching point should be less than 2A, namely less than the sum of full-load currents of the output paths a and B, so as to ensure stable output of voltage.
In the following, with reference to table 1, the adjustment strategy of the control unit is specifically described for several specific application scenarios.
TABLE 1
Figure BDA0003099326800000231
Referring to table 1, when the method is applied to a folding screen or a notebook computer, since the loads required by both are approximately 1-3A, the output of the power supply chip adopts the form of 1 positive voltage output channel (phase) and 2 negative voltage phases. When the method is applied to the vehicle-mounted display, the output of the power supply chip adopts the form of 2 positive voltage phases, 2 or 3 negative voltage phases because the load current of the vehicle-mounted display is large (at least more than 3A).
The load of the product is divided into three conditions of light load, medium load and heavy load, see table 1, and for each product, the adjustment strategy is as follows:
1)1 positive pressure phase, 2 negative pressure phase; 1 positive pressure phase and 1 negative pressure phase are adopted for output in light load; during medium load, 1 positive pressure phase and 1 negative pressure phase are adopted for output; during heavy load, 1 positive pressure phase and 2 negative pressure phases are adopted for output.
2)2 positive pressure phases, 2 negative pressure phases; 1 positive pressure phase and 1 negative pressure phase are adopted for output in light load; during medium load, 1 positive pressure phase and 2 negative pressure phases are adopted for output; and 2 positive pressure phases and 2 negative pressure phases are adopted for output during heavy load.
3)2 positive pressure phases, 3 negative pressure phases; 1 positive pressure phase and 1 negative pressure phase are adopted for output in light load; during medium load, 1 positive pressure phase and 2 negative pressure phases are adopted for output; and 2 positive pressure phases and 3 negative pressure phases are adopted for output during heavy load.
The above embodiments are not intended to limit the present invention. Output channels can be flexibly distributed according to actual conditions during specific application, and the aim of improving the working efficiency is fulfilled.
In one embodiment, optionally, the magnitude of the full load current of at least two output paths is not equal. The adjusting strategy may include adjusting the number of output paths having output signals in the power chip, switching the output paths, or an organic combination of the two. The specific adjustment strategy is similar to the adjustment strategy for equalizing the full load current of each output path, and is not described herein again. Only the number of output paths with output signals needs to be increased, and meanwhile, the output paths with the output signals at present are considered to be switched to the output paths with larger full load current; while the number of output paths having an output signal is reduced, it is sufficient to switch the output path having the current output signal to an output path having a smaller full load current.
Fig. 8 is a flowchart illustrating a power adjustment method for a display panel according to another embodiment of the present invention. Referring to fig. 8, in one embodiment, optionally, in addition to regulating the output of the power chip according to the output current, a temperature detection factor may be introduced into the regulation strategy to prevent the normal operation and lifetime of the power chip from being affected by the over-temperature. Specifically, the power supply regulation method comprises the following steps:
s510, the current detecting unit detects an output current of the power chip, where the output current is a sum of currents of at least two output paths.
S520, the control unit adjusts the number of output paths with output signals in the power chip and/or switches the output paths according to the output current and the efficiency threshold current of the output paths with signal output.
S530, the temperature detection unit detects the operating temperature of the power supply chip.
And S540, the control unit adjusts the number of output paths with output signals in the power supply chip and/or switches the output paths according to the operation temperature.
Wherein, the step can specifically include: judging whether the operation temperature reaches the upper limit of the operation of the power supply chip; if so, increasing the number of output paths with output signals, or switching the current output paths with the output signals into output paths with larger full load current; otherwise, the adjustment is ended.
The order of the steps is only an example, and is not intended to limit the present invention. In other embodiments, the order of the steps may be adjusted as desired. For example, the temperature detection step (S530) and the current detection step (S510) may be performed simultaneously; the control unit may include two control sub-units operating independently for adjusting the output of the power chip according to the current signal and adjusting the output of the power chip according to the temperature signal (i.e., performing S520 and S540, respectively).
In this embodiment, the temperature detection factor is introduced into the adjustment strategy, and when the operating temperature reaches the upper limit, even if the output current of the current output path meets the load requirement, the current output path is adjusted to be the output path with higher full load capacity, so that the heating phenomenon is relieved, the temperature of the power chip is reduced, and the service life of the power chip is prolonged.
It should be noted that the control unit may be composed of a judgment subunit and a control subunit, and in each of the above embodiments, each step related to the judgment may be completed by the judgment subunit; the control subunit can output the adjustment instruction according to the judgment result of the judgment subunit.
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 power supply adjusting apparatus for a display panel, comprising:
the power supply chip comprises at least two output paths, and the voltage types of the at least two output paths are the same;
the current detection unit is used for detecting the output current of the power supply chip, and the output current is the sum of the currents of the at least two output channels;
the control unit is electrically connected with the power chip and the current detection unit respectively; the control unit is used for adjusting the number of the output paths with the output signals in the power chip and/or switching the output paths according to the output current and the efficiency threshold current of the output paths with the output signals.
2. The power supply adjusting apparatus of a display panel according to claim 1, wherein the voltage type is a positive voltage or a negative voltage;
the control unit is used for adjusting the number of positive voltage output paths with output signals in the power chip and/or switching the positive voltage output paths according to the output current and the efficiency threshold current of the output paths with the output signals;
and/or the control unit is used for adjusting the number of negative voltage output paths with output signals in the power chip and/or switching the negative voltage output paths according to the output current and the efficiency threshold current of the output paths with the output signals;
preferably, the full-load currents of at least two positive-voltage output channels are equal or unequal in magnitude;
and the full-load currents of at least two negative-voltage output channels are equal or unequal in magnitude.
3. The power supply adjustment device of the display panel according to claim 1, wherein the control unit includes:
the judging subunit is used for judging whether the working efficiency of the power supply chip meets an efficiency threshold value or not according to the output current and the efficiency threshold current of the output path with the output signal;
the control subunit is electrically connected with the judgment subunit and the power supply chip respectively; the control subunit is used for adjusting the number of the output paths with the output signals in the power chip and/or switching the output paths according to the output signals of the judging subunit.
4. The power supply regulator of display panel according to claim 1, further comprising:
the temperature detection unit is used for detecting the operating temperature of the power supply chip;
the control unit is electrically connected with the temperature detection unit and is also used for adjusting the number of the output paths with output signals in the power chip and/or switching the output paths according to the operating temperature;
preferably, the temperature detecting unit includes: a contact temperature sensor or a non-contact temperature sensor;
the power supply chip is electrically connected with the control unit, and the power supply chip is electrically connected with the control unit;
the non-contact temperature sensor comprises a sensing end and an output end, the sensing end of the non-contact temperature sensor is arranged in the temperature radiation range of the power supply chip, and the output end of the non-contact temperature sensor is electrically connected with the control unit.
5. The power regulator of claim 1, wherein the current detection unit comprises:
the current transformer comprises a sensing end and an output end; the sensing end of the current transformer and the output channel generate electromagnetic induction to generate induction current, and the output end of the current transformer is electrically connected with the control unit;
alternatively, the current detection unit includes:
the sampling resistor is connected between an output path of the power supply chip and a load in series;
the voltage detection subunit comprises a first detection end, a second detection end and an output end; the first detection end and the second detection end of the voltage detection subunit are respectively connected with two ends of the sampling resistor and used for collecting the voltage of the sampling resistor; and the output end of the voltage detection subunit is electrically connected with the control unit.
6. A display device comprising a battery and a power supply adjustment device according to any one of claims 1 to 5; the battery is electrically connected with the power supply chip and used for supplying power to the power supply chip.
7. A power supply adjusting method of a display panel is characterized in that a power supply adjusting device of the display panel comprises the following steps:
the power supply chip comprises at least two output paths, and the voltage types of the at least two output paths are the same;
a current detection unit;
the control unit is electrically connected with the power chip and the current detection unit respectively;
the power supply regulation method comprises the following steps:
the current detection unit detects the output current of the power supply chip, wherein the output current is the sum of the currents of the at least two output channels;
and the control unit adjusts the number of the output paths with the output signals in the power chip and/or switches the output paths according to the output current and the efficiency threshold current of the output paths with the output signals.
8. The method of claim 7, wherein the efficiency threshold current comprises a first current switching point and a second current switching point;
the adjusting the number of output paths with output signals in the power chip according to the output current and the efficiency threshold current of the output paths with output signals comprises:
if the output current is in a rising stage and is greater than the first current switching point, increasing the number of the output paths with output signals;
if the output current is in a descending stage and the output current is smaller than the second current switching point, reducing the number of the output paths with output signals;
wherein the second current switching point is less than or equal to the first current switching point;
preferably, the first current switching point is determined by a full load current of the output path having an output signal; the second current switching point is determined by a full load current of the output path having a portion of the output signal.
9. The method of claim 7, wherein the efficiency threshold current comprises a first current switching point and a second current switching point;
at least two of the output paths are not equal in full load current magnitude, and switching the output paths according to the output current and an efficiency threshold current of the output path having an output signal includes:
if the output current is in a rising stage and the output current is larger than the first current switching point, switching the output path with the current output signal into the output path with larger full-load current;
if the output current is in a descending stage and the output current is smaller than the second current switching point, switching the output path with the current output signal into the output path with smaller full-load current;
wherein the second current switching point is less than or equal to the first current switching point.
10. The method of claim 7, wherein the power conditioning device further comprises:
the control unit is electrically connected with the temperature detection unit;
the power supply regulation method further comprises the following steps:
the temperature detection unit detects the operating temperature of the power supply chip;
the control unit adjusts the number of the output paths with output signals in the power supply chip and/or switches the output paths according to the operation temperature;
preferably, adjusting the number of the output paths having output signals in the power chip and/or switching the output paths according to the operating temperature includes:
and if the operation temperature reaches the upper limit of the operation of the power supply chip, increasing the number of the output paths with the output signals, or switching the output paths with the current output signals into the output paths with larger full-load current.
CN202110619777.6A 2021-06-03 2021-06-03 Power supply adjusting device and method of display panel and display device Active CN113342105B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110619777.6A CN113342105B (en) 2021-06-03 2021-06-03 Power supply adjusting device and method of display panel and display device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110619777.6A CN113342105B (en) 2021-06-03 2021-06-03 Power supply adjusting device and method of display panel and display device

Publications (2)

Publication Number Publication Date
CN113342105A true CN113342105A (en) 2021-09-03
CN113342105B CN113342105B (en) 2022-11-11

Family

ID=77473403

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202110619777.6A Active CN113342105B (en) 2021-06-03 2021-06-03 Power supply adjusting device and method of display panel and display device

Country Status (1)

Country Link
CN (1) CN113342105B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114120911A (en) * 2021-12-17 2022-03-01 合肥维信诺科技有限公司 Driving method of display panel, power management chip and display device
WO2023065398A1 (en) * 2021-10-18 2023-04-27 Tcl华星光电技术有限公司 Display power supply module and display apparatus

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104464677A (en) * 2014-12-26 2015-03-25 上海中航光电子有限公司 Data access circuit, display panel, display device and driving method
CN105405425A (en) * 2015-12-24 2016-03-16 昆山龙腾光电有限公司 Driving circuit switching control circuit and display device
CN206164176U (en) * 2016-09-28 2017-05-10 惠州茂硕能源科技有限公司 Battery charging control circuit
CN109861560A (en) * 2013-08-01 2019-06-07 华为技术有限公司 Power conversion module, power supply unit and method of supplying power to
CN210403146U (en) * 2019-09-16 2020-04-24 昆山龙腾光电股份有限公司 Automatic switching circuit, adapter plate and display device
CN210984236U (en) * 2019-12-12 2020-07-10 昆山龙腾光电股份有限公司 Power supply mode selection circuit, flexible circuit board and display device

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109861560A (en) * 2013-08-01 2019-06-07 华为技术有限公司 Power conversion module, power supply unit and method of supplying power to
CN104464677A (en) * 2014-12-26 2015-03-25 上海中航光电子有限公司 Data access circuit, display panel, display device and driving method
CN105405425A (en) * 2015-12-24 2016-03-16 昆山龙腾光电有限公司 Driving circuit switching control circuit and display device
CN206164176U (en) * 2016-09-28 2017-05-10 惠州茂硕能源科技有限公司 Battery charging control circuit
CN210403146U (en) * 2019-09-16 2020-04-24 昆山龙腾光电股份有限公司 Automatic switching circuit, adapter plate and display device
CN210984236U (en) * 2019-12-12 2020-07-10 昆山龙腾光电股份有限公司 Power supply mode selection circuit, flexible circuit board and display device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023065398A1 (en) * 2021-10-18 2023-04-27 Tcl华星光电技术有限公司 Display power supply module and display apparatus
CN114120911A (en) * 2021-12-17 2022-03-01 合肥维信诺科技有限公司 Driving method of display panel, power management chip and display device
CN114120911B (en) * 2021-12-17 2022-09-20 合肥维信诺科技有限公司 Driving method of display panel, power management chip and display device

Also Published As

Publication number Publication date
CN113342105B (en) 2022-11-11

Similar Documents

Publication Publication Date Title
CN113342105B (en) Power supply adjusting device and method of display panel and display device
US10741117B2 (en) DC-DC converter and display device having the same
US20120139516A1 (en) Power supply circuit with adaptive input selection and method for power supply
US7446432B2 (en) Electronic device having path of power supplied to display part switched according to whether external power is supplied
WO2014173293A9 (en) Switching mode charger for charging system
US9385597B2 (en) Multi-mode current-allocating device
US7574617B2 (en) Electronic device and control method thereof
US20030218894A1 (en) Electronic apparatus
US7952328B2 (en) Multi-battery charging system and method
TW201312916A (en) Power supply circuit and power supply circuit with adaptively enabled charge pump
US9582066B2 (en) Stand-by power control device, liquid crystal display device including the same, and method of controlling stand-by power
US7656057B2 (en) Power conditioner and method of operating the same
US20130033241A1 (en) Dc-dc converter capable of configuring topology
KR101680792B1 (en) Electric device and control method of the same
CN103872883B (en) A kind of pressure-limit current-limit control device of flyback power supply
CN103023308A (en) Power supply circuit and power supply circuit with adaptive enabling charge pump
KR101770910B1 (en) A Bidirectional DC/DC Converter Aging System
WO2017195484A1 (en) Power supply device and power supply method
US20140152104A1 (en) Multi-Output Switching Regulator and Multi-Output Power Supply Method
JP3202651B2 (en) Input power control type charging system
CN108183611A (en) Control device and method of bidirectional switch circuit
JP3886143B1 (en) Bank switching type capacitor power supply device and charging method
KR20130027808A (en) Power control device and method
US20240006874A1 (en) Direct current/direct current converter and control method thereof
JP2011176904A (en) Distributed power supply system, control method, program, and recording medium

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant