CN115249463A - Display device and control method thereof - Google Patents

Display device and control method thereof Download PDF

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Publication number
CN115249463A
CN115249463A CN202110468651.3A CN202110468651A CN115249463A CN 115249463 A CN115249463 A CN 115249463A CN 202110468651 A CN202110468651 A CN 202110468651A CN 115249463 A CN115249463 A CN 115249463A
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China
Prior art keywords
power supply
unit
signal
supply unit
control
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CN202110468651.3A
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Chinese (zh)
Inventor
张晓�
管恩慧
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BOE Technology Group Co Ltd
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BOE Technology Group Co Ltd
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Priority to CN202110468651.3A priority Critical patent/CN115249463A/en
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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • 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

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

Abstract

The present disclosure provides a display device and a control method thereof. The display device comprises a switch control circuit, a first power supply unit, a second power supply unit, a first control unit, a second control unit, a display panel driving board and a backlight module; the switch control circuit receives the starting signal and sends a first starting signal to the first power supply unit; the first power supply unit is started under the control of the first starting signal and provides a first power supply voltage for the first control unit, the second control unit and the backlight module; the first control unit is started under the first power supply voltage and sends a power supply starting signal to the first power supply unit and the switch control circuit; the first power supply unit provides a starting control signal for the switch control circuit under the control of a power supply starting signal; the switch control circuit sends a second starting signal to the second power supply unit under the control of the power supply starting signal and the starting control signal; the second power supply unit is started under the control of the second turn-on signal and supplies a second power supply voltage to the display panel driving board.

Description

Display device and control method thereof
Technical Field
The present disclosure relates to the field of display technologies, and in particular, to a display device and a control method thereof.
Background
In a simple low power consumption display System, a display panel driving board (TCON) may be powered by a System main board (e.g., a System On Chip (SOC)). However, the power supply method causes low conversion efficiency of the power supply and large power consumption, and is not suitable for a high-power display system.
In the heterogeneous display system, the power consumption of the power supply is large, and power can be supplied through a plurality of power supply boards. Meanwhile, because the power consumption of the TCON is usually larger, the power supply board card can directly supply power to the TCON. However, by adopting the power supply mode, when the display system is powered off, all the board cards are powered off at the same time, and the power supply time sequence of all the board cards cannot be controlled by using the system mainboard. In addition, due to the existence of the backlight module and the capacitor on the TCON, the electric charges accumulated by the capacitor are discharged at the moment of power failure, so that the TCON enters a self-checking picture, and further abnormal display (the self-checking picture which should not appear) appears on a screen.
Disclosure of Invention
The present disclosure provides a display apparatus and a control method thereof.
In a first aspect of the present disclosure, a display device is provided, which includes a switch control circuit, a first power supply unit, a second power supply unit, a first control unit, a second control unit, a display panel driving board, and a backlight module;
the switch control circuit is electrically coupled with the first power supply unit and the second power supply unit respectively and is configured to: receiving a starting signal and sending a first starting signal to the first power supply unit;
the first power supply unit is electrically coupled with the first control unit, the second control unit and the backlight module respectively and is configured to: receiving the first starting signal, starting the first starting signal under the control of the first starting signal, and providing a first power supply voltage for the first control unit, the second control unit and the backlight module;
the first control unit configured to: starting under the first power supply voltage and sending power supply starting signals to the first power supply unit and the switch control circuit;
the first power supply unit further configured to: under the control of the power supply starting signal, a starting control signal is provided for the switch control circuit;
the switch control circuit further configured to: sending a second starting signal to the second power supply unit under the control of the power supply starting signal and the starting control signal;
the second power supply unit electrically coupled with the display panel driving board and configured to: and receiving the second starting signal, starting under the control of the second starting signal, and providing a second power supply voltage for the display panel driving board.
In a second aspect of the present disclosure, a method for controlling a display device is provided, where the display device includes a switch control circuit, a first control unit, a second control unit, a first power supply unit, a second power supply unit, a display panel driver board, and a backlight module, and the method includes:
receiving a starting signal by using the switch control circuit and sending a first starting signal to the first power supply unit;
the first power supply unit receives the first starting signal, is started under the control of the first starting signal, and provides a first power supply voltage for the first control unit, the second control unit and the backlight module;
the first control unit is started under the first power supply voltage and sends a power supply starting signal to the first power supply unit and the switch control circuit;
the first power supply unit provides a starting control signal to the switch control circuit under the control of the power supply starting signal;
the switch control circuit sends a second starting signal to the second power supply unit under the control of the power supply starting signal and the starting control signal; and
the second power supply unit receives the second start signal, is started under the control of the second start signal, and provides a second power supply voltage for the display panel driving board.
According to the display device and the control method thereof, the power-on time of the display panel driving board (TCON) is later than the power-on time of the first control unit, the second control unit and the backlight module, so that a user cannot see a self-detection picture provided by the display panel driving board (TCON) when the display device is started, and abnormal display cannot be caused.
Drawings
In order to more clearly illustrate the technical solutions in the present disclosure or related technologies, the drawings needed to be used in the description of the embodiments or related technologies are briefly introduced below, and it is obvious that the drawings in the following description are only embodiments of the present disclosure, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 illustrates a schematic structural diagram of an exemplary display device provided by an embodiment of the present disclosure.
Fig. 2 shows a schematic circuit diagram of an exemplary display device provided in an embodiment of the present disclosure.
Fig. 3 illustrates an exemplary timing diagram of a portion of signals of a display device according to an embodiment of the present disclosure.
Fig. 4 shows a flow diagram of an exemplary method provided by an embodiment of the present disclosure.
Detailed Description
For the purpose of promoting a better understanding of the objects, aspects and advantages of the present disclosure, reference is made to the following detailed description taken in conjunction with the accompanying drawings.
It is to be noted that technical terms or scientific terms used in the embodiments of the present disclosure should have a general meaning as understood by one having ordinary skill in the art to which the present disclosure belongs, unless otherwise defined. The use of "first," "second," and similar terms in the embodiments of the disclosure is not intended to indicate any order, quantity, or importance, but rather is used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that the element or item preceding the word comprises the element or item listed after the word and its equivalent, but does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.
In a non-heterogeneous system, the number of boards in the complete machine is small, the type of power supply is relatively simple, and the power consumption is also low, so a main control board (for example, SOC) is usually used for supplying power to the TCON board. At the moment of power failure, the TCON can be powered off in priority to the system control board. However, in this control method, because the TCON power supply is integrated on the system control board, although the problem of abnormal display of the screen can be solved, the power supply conversion efficiency is low, and the control method is not suitable for the application scenario of a large-power complete machine. In a complex heterogeneous display system, because the types of boards are many and multiple power supplies are usually required for supplying power, and the power consumption of a main board is also large, the problem of heat dissipation and power increase caused by integrating the power supply of the TCON on the main board is undoubtedly caused.
Based on this, the present disclosure proposes a display device and a control method thereof. The display device comprises a switch control circuit, a first power supply unit, a second power supply unit, a first control unit, a second control unit, a display panel driving board and a backlight module; the switch control circuit is electrically coupled with the first power supply unit and the second power supply unit respectively and is configured to: receiving a starting signal and sending a first starting signal to the first power supply unit; the first power supply unit is electrically coupled with the first control unit, the second control unit and the backlight module respectively, and is configured to: receiving the first starting signal, starting the backlight module under the control of the first starting signal, and providing a first power supply voltage for the first control unit, the second control unit and the backlight module; the first control unit configured to: starting under the first power supply voltage and sending power supply starting signals to the first power supply unit and the switch control circuit; the first power supply unit further configured to: under the control of the power supply starting signal, a starting control signal is provided for the switch control circuit; the switch control circuit further configured to: sending a second starting signal to the second power supply unit under the control of the power supply starting signal and the starting control signal; the second power supply unit electrically coupled with the display panel driving board and configured to: and receiving the second starting signal, starting under the control of the second starting signal, and providing a second power supply voltage for the display panel driving board.
According to the display device and the control method thereof, the power-on time of the display panel driving board (TCON) is later than the power-on time of the first control unit, the second control unit and the backlight module, so that a user cannot see a self-detection picture provided by the display panel driving board (TCON) when the display device is started, abnormal display cannot be caused, and the problem of picture abnormal display when the display device is powered on and started is solved.
Fig. 1 illustrates a schematic structural diagram of an exemplary display device 100 provided by an embodiment of the present disclosure.
As shown in fig. 1, the display device 100 may include a switch control circuit 102, a first power supply unit 104, a second power supply unit 106, a first control unit 108, a second control unit 110, a display panel driving board 112, and a backlight module 114. The switch control circuit 102 may be electrically coupled to the first power supply unit 104 and the second power supply unit 106, respectively, the first power supply unit 104 may be further electrically coupled to the first control unit 108, the second control unit 110, and the backlight module 114, respectively, and the second power supply unit 106 may be further electrically coupled to a display panel driver board (TCON) 112. In some embodiments, as shown in fig. 1, the second power supply unit 106 may further be electrically coupled to the backlight module 114 and the second control unit 110, respectively.
The first power supply unit 104, the second power supply unit 106 and the power supply AC together form a power supply module of the display device 100, and are used for supplying power to the rear-stage board card. Alternatively, the first power supply unit 104 and the second power supply unit 106 may be implemented by power boards of independent boards. Alternatively, the first power supply unit 104 may serve as a primary power supply and the second power supply unit 106 may serve as a secondary power supply. The first control unit 108 may be an SOC, the second control unit 110 may be a Field Programmable Gate Array (FPGA), and the first control unit 108 and the second control unit 110 form a dual system structure of the display device 100, in which the FPGA processes an image, adjusts image quality, and inputs and outputs signals; the SOC performs on-screen-menu (OSD) display processing and control of a remote controller, keys, and other control circuits. In the actual working process, the power consumption of the SOC unit is relatively low, and the power consumption of the FPGA may change with information such as video display content and data processing content.
The switch control circuit 102 may receive the enable signal and send a first turn-on signal 202 to the first power supply unit 104.
Fig. 2 shows a schematic circuit structure diagram of an exemplary display device 100 provided in an embodiment of the present disclosure. As shown in fig. 2, in some embodiments, the switch control circuit 102 may include a single-pole double-throw switch 1022, and when the single-pole double-throw switch 1022 is switched to an open state ON, the switch control circuit 102 may be considered to receive the enable signal. As shown in fig. 2, in some embodiments, the switch control circuit 102 may further include a first branch and a second branch. The first power supply unit 104 may be electrically coupled with the power supply AC via the first branch. The second branch may be provided with a relay 1024, and the second power supply unit 106 may be electrically coupled with the power supply AC via the relay 1024 and the first branch. As shown in fig. 2, in some embodiments, the first branch may be electrically coupled to the first power supply unit 104 and the power supply AC respectively through an ON side ON of the single-pole double-throw switch 1022, when the single-pole double-throw switch 1022 is switched to an ON state ON, the first power supply unit 104 may be communicated with the power supply AC, and at this time, it is considered that the first power supply unit 104 receives the first ON signal 202, and then the power supply AC may supply power through the first power supply unit 104. As can be seen from fig. 2, the second power supply unit 106 is electrically coupled to the power supply AC via the relay 1024 and the first branch, so that, when the relay is in the off state, even if the single-pole double-throw switch 1022 is switched to the ON state ON (i.e., the first branch is connected), the second power supply unit 106 cannot be connected to the power supply AC, and thus, only when the first branch is connected, the second power supply unit 106 cannot be connected to the power supply AC, so that the ON time of the module powered by the second power supply unit 106 lags behind the ON time of the module powered by the first power supply unit 104.
The first power supply unit 104 may be activated under the control of the first turn-on signal 202 (for example, the standby part may be turned on first), and provides the first power supply voltage 204 to the first control unit 108, the second control unit 110 and the backlight module 114.
The first control unit 108 may then start at the first supply voltage 204 and send a supply-on signal 206 to the first supply unit 104 and the switch control circuit 102. For example, the power-ON signal 206 may be a PS-ON (power-ON) signal set to a high level, and the first power unit 104 is turned ON completely after receiving the PS-ON signal, and then the first power unit 104 starts to supply power to the first control unit 108, the second control unit 110 and the backlight module 114 normally. In some embodiments, as shown in fig. 2, the power on signal 206 may be provided to a second branch of the switch control circuit 102 (which may be electrically coupled to the OFF side OFF of the single pole double throw switch 1022) and may thus be provided to the relay 1024 for turning on the relay 1024.
The first power supply unit 104 may provide an on control signal 208 to the switch control circuit 102 under control of the power supply on signal 206. For example, the turn-on control signal 208 may be a display control Signal (STB). In some embodiments, as shown in fig. 2, the first power unit 104 may also feed back the turn-on control signal 208 to the first control unit 108.
The switch control circuit 102 may send a second turn-on signal 210 to the second power supply unit 106 under the control of the power supply turn-on signal 206 and the turn-on control signal 208. In some embodiments, as shown in fig. 2, the relay 1024 is connected under the control of the power supply on signal 206 and the on control signal 208 to connect the power supply AC to the second power supply unit 106, and it is considered that the second power supply unit 106 receives the second on signal 210, so that the power supply AC can be supplied by the second power supply unit 106.
The second power supply unit 106 may be activated under the control of the second turn-on signal 210 and provide a second power supply voltage 212 to the display panel driving board 112. Here, the display panel driving board 112 is directly supplied with power from the second power supply unit 106 without taking power from the first control unit 108 or the second control unit 110, so that the amount of data to be processed by the first control unit 108 or the second control unit 110 can be appropriately reduced, thereby reducing the power consumption of the display device 100 as a whole to some extent.
Therefore, in the display device 100 provided in the embodiment of the present disclosure, the switch control circuit 102 is utilized to control the first power supply unit 104 to communicate with the power supply AC, so that the first power supply unit 104 can power up the first control unit 108, the second control unit 110, and the backlight module 114, and then under the combined action of the control signals provided by the first control unit 108 and the first power supply unit 104, the switch control circuit 102 is utilized to control the second power supply unit 106 to communicate with the power supply AC, so that the second power supply unit 106 supplies power to the display panel driving board (TCON) 112. Fig. 3 illustrates an exemplary timing diagram of a portion of signals of the display apparatus 100 according to an embodiment of the present disclosure. As shown in fig. 3, it can be seen that the secondary power supply is activated later than the primary power supply, so that the display panel driver board (TCON) 112 is powered up later than the other modules.
In this way, the power-on time of the display panel driving board (TCON) 112 is later than the power-on time of the first control unit 108, the second control unit 110 and the backlight module 114, so that a user cannot see the self-test picture provided by the display panel driving board (TCON) 112 when the computer is turned on, and abnormal display cannot be caused.
In some embodiments, as shown in fig. 1 and 2, the display panel driving board 112 may be further electrically coupled to the second control unit 110 and the backlight module 114, respectively, and the display panel driving board 112 may transmit the enable control signal 216 to the backlight module 114 in response to completion of the handshake with the second control unit 110. The display panel driving board 112 and the second control unit 110 may complete a handshake using a handshake signal 214, for example, the handshake signal 214 may be a LOCK signal. Thus, the LOCK signal (handshake signal, which starts to transmit display data after completing handshake between the FPGA and the TCON) between the FPGA and the TCON is used as a logic signal for lighting the backlight module 114, that is, the backlight module 114 is only lighted when the LOCK signal is detected normally, thereby further avoiding abnormal display during startup.
In a high-brightness application scenario, since the power consumption of the backlight module 114 is relatively high, it is sometimes difficult to supply power from a single power source, and therefore, in some embodiments, as shown in fig. 1 and fig. 2, the second power supply unit 106 may further provide the second power supply voltage 212 for the backlight module 114.
Since in a heterogeneous system, the power consumption of the second control unit 110 may be uncertain when it employs an FPGA. Accordingly, in some embodiments, as shown in fig. 1 and 2, the display device 100 may further include a power switching unit 116. As shown in fig. 1 and fig. 2, the power switching unit 116 may be electrically coupled to the second control unit 110, the display panel driving board 112, the first power supply unit 104, and the second power supply unit 106, respectively, so that the first power supply unit 104 may be electrically coupled to the second control unit 110 and the display panel driving board 112 through the power switching unit 116, and similarly, the second power supply unit 106 may also be electrically coupled to the second control unit 110 and the display panel driving board 112 through the power switching unit 116, respectively, so that both the first power supply unit 104 and the second power supply unit 106 may supply power to the second control unit 110 or the display panel driving board 112. In some embodiments, as shown in fig. 2, the power switching unit 116 may include a control circuit for performing the above-described operation steps of the power switching unit 116. In some embodiments, the control circuit may be a part of the circuit structure of the display device 100, and may be a peripheral circuit of the first control unit 108 and the second control unit 110.
After the display apparatus 100 is in normal operation, the power switching unit 116 may determine an amount of data stored in a memory (e.g., DDR) 1102 of the second control unit 110, and then determine power consumption of the second control unit 110 according to the amount of data; in response to the power consumption of the second control unit 110 being higher than the preset power consumption threshold, the power switching unit 116 may control the second power supply unit 106 to switch from providing the second power supply voltage 212 to the display panel driving board 112 to providing the second power supply voltage 212 to the second control unit 110, and control the first power supply unit 104 to provide the first power supply voltage 204 to the display panel driving board 112.
In this way, in the working process of the heterogeneous system, the power supply is redistributed and designed according to the power consumption change condition of the second control unit 110 in the actual working state due to the different data volumes through the power switching unit 116, so that the power consumption balance of the power supply is ensured, the heat dissipation of the power supply is reduced, and the working stability of the system is improved.
In some embodiments, the data stored by the memory 1102 of the second control unit 110 may include first high speed transceiver data (e.g., GTX data), second high speed transceiver data (e.g., GTH data), and low speed transceiver data (e.g., I2C data, GPIO data, or other I/O data). At this time, the power consumption of the second control unit 110 is uncertain and related to the channel usage of the high speed signal, and therefore, the power switching unit 116 may determine the power consumption of the second control unit 110 according to the data amounts of the first high speed transceiver data, the second high speed transceiver data, and the low speed transmission and reception data.
In some embodiments, the preset power consumption threshold may be determined according to a sum of power consumptions of the first control unit 108 and the display panel driving board 112, for example, may be determined according to a sum of an empirical value of power consumption (for example, 20W) of the first control unit 108 and an empirical value of power consumption (for example, 10W) of the display panel driving board 112 (for example, the preset power consumption threshold is set to 30W).
For example, according to the relationship between the data processing situation and the power consumption in the FPGA, the processing and using situation of the GTX data in the FPGA is assumed to be Q 1 GTH data processing and usage Q 2 The data processing and use case of other low-speed signals is Q 3 . Power of FPGA is P F Then the basic correspondence P between power consumption and data usage can be obtained F ＝f 1 (Q 1 )+f 2 (Q 2 )+f 3 (Q 3 ). Meanwhile, the power use conditions of the TCON and the SOC can be estimated and respectively set as P T And P S . After the system has gone into normal operation, the power can be compared, assuming P F ＞P T +P S If yes, exchanging power supply units of the FPGA and the TCON, adopting a second power supply unit 106 to supply power to the FPGA, and adopting a first power supply unit 104 to supply power to the SOC and the TCON; and assume P F ≤P T +P S Then, the power distribution state of the initial power source is maintained, that is, the SOC and the FPGA are supplied with power using the first power supply unit 104, and the TCON is supplied with power using the second power supply unit 106.
When the power is OFF, the display apparatus 100 may perform the operation of turning OFF the power by receiving a power-OFF signal from a remote controller (not shown), or may perform the operation of turning OFF the power by a power-OFF signal from a physical key (for example, the single-pole double-throw switch 1022 is switched to the OFF state OFF).
In some embodiments, the first control unit 108 may receive a shutdown signal from a remote controller and send a power supply shutdown signal 218 to the first power supply unit 104 and the switch control circuit 106 under the control of the shutdown signal; for example, the POWER down signal 218 may be a PS-ON (POWER SUPPLY-ON) signal asserted low.
At this time, the relay 1024 is immediately opened when receiving the power supply off signal 218, so that the path between the power supply AC and the second power supply unit 106 is immediately opened, thereby powering off the display panel driving board 112 before the first power supply unit 104. The first power supply unit 104 may be powered down under the control of the power off signal 218, and the first power supply unit 104 may lag behind the second power supply unit 106 based on the system control inside the display device 100. After the first power supply unit 104 is powered off, the first control unit 108, the second control unit 110 and the backlight module 114 are powered off, so that the shutdown process is completed.
In some embodiments, as shown in fig. 2, the switch control circuit 102 may further include an energy storage unit (e.g., composed of a resistor R and a capacitor C connected in series), which may store energy under the power of the power supply AC after the switch control circuit 102 receives the start signal.
The switch control circuit 102 may receive a shutdown signal when the single-pole double-throw switch 1022 is switched to the OFF state OFF; the relay 1024 may be immediately opened under the control of the shutdown signal (at this time, the second branch of the switch control circuit 102 is grounded, i.e., a low level signal), so that the path between the power supply AC and the second power supply unit 106 is immediately opened, thereby immediately powering off the display panel driving board 112. At this time, the energy storage unit may utilize the stored electric energy to continuously supply power to the first power supply unit 104 after the switch control circuit 102 receives the shutdown signal, that is, although the ON side of the single-pole double-throw switch 1022 is turned off, the energy storage unit may also utilize the electric energy stored in the capacitor C to continuously supply power for a period of time, and the first power supply unit is powered off after the electric energy stored in the energy storage unit is consumed. Thus, the display panel driving board 112 is powered off prior to other modules, and display abnormality can be avoided.
It can be seen that, in both of the above two power-off methods, the power-off of the display panel driving board 112 is first performed by controlling the power timing of the heterogeneous system when the power is off, so that at the moment of power-off and power-off, a user cannot see an abnormal picture of self-checking of the TCON picture, and the problem of abnormal picture display at the moment of power-off and power-off is solved.
In addition, compared to the single-pole double-throw switch 1022 disposed outside the ac power (i.e., at the back end of the three-phase socket), the single-pole double-throw switch in the embodiment of the disclosure is disposed at the control end, and after the first power supply unit 104 is started, the second power supply unit 106 needs the control signal from the first power supply unit 104 to operate on the basis, so that the TCON can be started in a delayed manner. When the power supply is powered off, the second power supply unit 106 is powered off instantly by the switching action, and the power-off time of the first power supply unit 104 is delayed from that of the second power supply unit 106 by the action of the delay circuit (the action of the energy storage unit).
In a second aspect of the disclosed embodiments, a method of controlling a display device is provided. Fig. 4 illustrates a flow diagram of an exemplary method 300 provided by an embodiment of the present disclosure. The method 300 may be implemented by the display device 100 and may include the following steps.
In step 302, the display apparatus 100 may receive the start signal and transmit the first turn-on signal 202 to the first power supply unit 104 using the switch control circuit 102.
In step 304, the first power supply unit 104 receives the first turn-on signal 202 and is turned on under the control of the first turn-on signal 202, and provides the first power supply voltage 204 to the first control unit 108, the second control unit 110 and the backlight module 114.
At step 306, the first control unit 108 starts at the first supply voltage 204 and sends a supply on signal 206 to the first supply unit 104 and the switch control circuit 102.
In step 308, the first power supply unit 104 provides the turn-on control signal 208 to the switch control circuit 102 under the control of the power supply turn-on signal 206.
In step 310, the switch control circuit 102 sends a second turn-on signal 210 to the second power supply unit 106 under the control of the power supply turn-on signal 206 and the turn-on control signal 208.
In step 312, the second power supply unit 106 receives the second turn-on signal 210 and is activated under the control of the second turn-on signal 210, and provides the second power supply voltage 212 to the display panel driving board 112.
In some embodiments, the display device 100 further comprises a power switching unit 116, and the method 300 further comprises: determining the amount of data stored in the memory of the second control unit 110 using the power switching unit 116; determining power consumption of the second control unit 110 according to the data amount using the power switching unit 116; and in response to the power consumption of the second control unit 110 being higher than the preset power consumption threshold, controlling the second power supply unit 106 with the power switching unit 116 to switch from providing the second power supply voltage 212 to the display panel driving board 112 to providing the second power supply voltage 212 to the second control unit 110, and controlling the first power supply unit 104 with the power switching unit 116 to provide the first power supply voltage 204 to the display panel driving board 112.
In some embodiments, the data stored by the memory of the second control unit 110 includes first high speed transceiver data, second high speed transceiver data, and low speed transmit and receive data, the method 300 further comprising:
the power consumption of the second control unit 110 is determined by the power switching unit 116 according to the data amounts of the first high-speed transceiver data, the second high-speed transceiver data, and the low-speed transmission and reception data.
In some embodiments, the method 300 further comprises: the second power supply unit is utilized to provide a second power supply voltage 212 to the backlight module 114.
In some embodiments, the method 300 further comprises: the first control unit 108 receives the shutdown signal and sends a power supply shutdown signal 218 to the first power supply unit 104 and the switch control circuit 102; the switch control circuit 102 disconnects the power supply AC from the second power supply unit 106 under the control of the power supply off signal 218, so that the display panel driving board 112 is powered off before the first power supply unit 104; and the first power supply unit 104 is powered down under the control of the power supply off signal 218.
In some embodiments, the switch control circuit 102 further comprises an energy storage unit, and the method 300 further comprises: after the switch control circuit 102 receives the start signal, the energy storage unit stores energy under the power supply of the power supply AC.
In some embodiments, the method 300 further comprises: in response to the single-pole double-throw switch 1022 being switched to the OFF state OFF, the switch control circuit 102 receives the power-OFF signal and disconnects the power supply AC from the second power supply unit 106 under the control of the power-OFF signal, thereby powering OFF the display panel driving board 112; after the switch control circuit 102 receives the shutdown signal, the energy storage unit supplies power to the first power supply unit 104 by using the stored energy; and the first power supply unit 104 is powered down after the energy stored in the energy storage unit is consumed.
The display device 100 of the foregoing embodiment is used to implement the method 300 corresponding to any one of the foregoing embodiments, and the method 300 has the beneficial effects of the embodiment of the display device 100, which are not described herein again.
Those of ordinary skill in the art will understand that: the discussion of any embodiment above is meant to be exemplary only, and is not intended to intimate that the scope of the disclosure, including the claims, is limited to these examples; within the idea of the present disclosure, also technical features in the above embodiments or in different embodiments may be combined, steps may be implemented in any order, and there are many other variations of the different aspects of the embodiments of the present disclosure as described above, which are not provided in detail for the sake of brevity.
In addition, well-known power/ground connections to Integrated Circuit (IC) chips and other components may or may not be shown in the provided figures for simplicity of illustration and discussion, and so as not to obscure the embodiments of the disclosure. Furthermore, devices may be shown in block diagram form in order to avoid obscuring embodiments of the present disclosure, and this also takes into account the fact that specifics with respect to implementation of such block diagram devices are highly dependent upon the platform within which the embodiments of the present disclosure are to be implemented (i.e., specifics should be well within purview of one skilled in the art). Where specific details (e.g., circuits) are set forth in order to describe example embodiments of the disclosure, it should be apparent to one skilled in the art that the embodiments of the disclosure can be practiced without, or with variation of, these specific details. Accordingly, the description is to be regarded as illustrative instead of restrictive.
While the present disclosure has been described in conjunction with specific embodiments thereof, many alternatives, modifications, and variations of these embodiments will be apparent to those of ordinary skill in the art in light of the foregoing description. For example, other memory architectures, such as Dynamic RAM (DRAM), may use the discussed embodiments.
The disclosed embodiments are intended to embrace all such alternatives, modifications and variances which fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalents, improvements, and the like that may be made without departing from the spirit or scope of the embodiments of the present disclosure are intended to be included within the scope of the disclosure.

Claims (13)

1. A display device comprises a switch control circuit, a first power supply unit, a second power supply unit, a first control unit, a second control unit, a display panel drive board and a backlight module;
the switch control circuit is electrically coupled with the first power supply unit and the second power supply unit respectively and is configured to: receiving a starting signal and sending a first starting signal to the first power supply unit;
the first power supply unit is electrically coupled with the first control unit, the second control unit and the backlight module respectively, and is configured to: receiving the first starting signal, starting the first starting signal under the control of the first starting signal, and providing a first power supply voltage for the first control unit, the second control unit and the backlight module;
the first control unit configured to: starting under the first power supply voltage and sending a power supply starting signal to the first power supply unit and the switch control circuit;
the first power supply unit further configured to: under the control of the power supply starting signal, a starting control signal is provided for the switch control circuit;
the switch control circuit further configured to: sending a second starting signal to the second power supply unit under the control of the power supply starting signal and the starting control signal;
the second power supply unit electrically coupled with the display panel driving board and configured to: and receiving the second starting signal, starting under the control of the second starting signal, and providing a second power supply voltage for the display panel driving board.
2. The display device of claim 1, further comprising a power supply; the switch control circuit comprises a first branch and a second branch, the first power supply unit is electrically coupled with the power supply through the first branch, the second branch is provided with a relay, the second power supply unit is electrically coupled with the power supply through the relay and the first branch, and the relay is communicated under the control of the power supply starting signal and the starting control signal, so that the power supply is communicated with the second power supply unit.
3. The display device of claim 2, wherein the switch control circuit further comprises a single pole double throw switch, the switch control circuit configured to: receiving the enable signal in response to the single-pole double-throw switch being switched to an on state;
wherein the first branch is electrically coupled with the first power supply unit and the power supply source respectively through the single-pole double-throw switch, and the first power supply unit and the power supply source are communicated in response to the single-pole double-throw switch being switched to an on state.
4. The display device of claim 1, wherein the second power supply unit is further electrically coupled to the second control unit, the display device further comprising a power supply switching unit electrically coupled to the second control unit, the display panel driving board, the first power supply unit, and the second power supply unit, respectively, and configured to:
determining an amount of data stored by a memory of the second control unit;
determining the power consumption of the second control unit according to the data amount;
in response to the power consumption of the second control unit being higher than a preset power consumption threshold, controlling the second power supply unit to switch from providing a second power supply voltage to the display panel driving board to providing the second power supply voltage to the second control unit, and controlling the first power supply unit to provide the first power supply voltage to the display panel driving board.
5. The display device according to claim 4, wherein the data stored in the memory of the second control unit includes first high-speed transceiver data, second high-speed transceiver data, and low-speed transmission and reception data, the power supply switching unit is configured to: and determining the power consumption of the second control unit according to the data volume of the first high-speed transceiver data, the second high-speed transceiver data and the low-speed transmitting and receiving data.
6. The display device of claim 1, wherein the second power supply unit is further electrically coupled to the backlight module and configured to: and providing the second power supply voltage for the backlight module.
7. The display device of claim 1, wherein the display panel driver board is further electrically coupled to the second control unit and the backlight module, respectively, and configured to: and responding to the completion of handshaking with the second control unit, and sending an enabling control signal to the backlight module.
8. The display device of claim 2, wherein the first control unit is further configured to: receiving a shutdown signal and sending a power supply shutdown signal to the first power supply unit and the switch control circuit;
the relay configured to: the power supply is disconnected under the control of the power supply closing signal, so that the power supply source is disconnected with the second power supply unit, and the display panel driving board is powered off before the first power supply unit;
the first power supply unit is configured to: and powering off under the control of the power supply closing signal.
9. The display device of claim 3, wherein the switch control circuit further comprises an energy storage unit and is configured to: after the switch control circuit receives the starting signal, energy storage is carried out under the power supply of the power supply; the switch control circuit further configured to: receiving a shutdown signal in response to the single pole double throw switch being switched to an off state;
the relay configured to: the power supply is disconnected under the control of the shutdown signal, so that the power supply is disconnected from the second power supply unit, and the display panel driving board is powered off;
the energy storage unit is further configured to: after the switch control circuit receives the shutdown signal, the stored electric energy is used for supplying power to the first power supply unit;
the first power supply unit further configured to: and the power is cut off after the electric energy stored in the energy storage unit is consumed.
10. A control method of a display device, wherein the display device comprises a switch control circuit, a first control unit, a second control unit, a first power supply unit, a second power supply unit, a display panel drive board and a backlight module, and the method comprises the following steps:
receiving a starting signal by using the switch control circuit and sending a first starting signal to the first power supply unit;
the first power supply unit receives the first starting signal, is started under the control of the first starting signal, and provides a first power supply voltage for the first control unit, the second control unit and the backlight module;
the first control unit is started under the first power supply voltage and sends power supply starting signals to the first power supply unit and the switch control circuit;
the first power supply unit provides a starting control signal to the switch control circuit under the control of the power supply starting signal;
the switch control circuit sends a second starting signal to the second power supply unit under the control of the power supply starting signal and the starting control signal; and
the second power supply unit receives the second start signal, is started under the control of the second start signal, and provides a second power supply voltage for the display panel driving board.
11. The method of claim 10, wherein the display device further comprises a power switching unit, the method further comprising:
determining an amount of data stored in a memory of the second control unit using the power switching unit;
determining the power consumption of the second control unit according to the data quantity by using the power supply switching unit; and
in response to the power consumption of the second control unit being higher than a preset power consumption threshold, controlling the second power supply unit to switch from providing the second power supply voltage to the display panel driving board to providing the second power supply voltage to the second control unit by using the power switching unit, and controlling the first power supply unit to provide the first power supply voltage to the display panel driving board by using the power switching unit.
12. The method of claim 10, wherein the method further comprises:
the first control unit receives a shutdown signal and sends a power supply shutdown signal to the first power supply unit and the switch control circuit;
the switch control circuit disconnects the power supply from the second power supply unit under the control of the power supply closing signal, so that the display panel driving board is powered off before the first power supply unit; and
the first power supply unit is powered off under the control of the power supply off signal.
13. The method of claim 10, wherein the switch control circuit further comprises an energy storage unit, the method further comprising:
after the switch control circuit receives the starting signal, the energy storage unit stores energy under the power supply of the power supply;
the switch control circuit receives a shutdown signal in response to the single pole double throw switch being switched to an off state;
the switch control circuit enables the power supply to be disconnected from the second power supply unit under the control of the shutdown signal, and then the display panel driving board is powered off;
the energy storage unit supplies power to the first power supply unit by using stored energy after the switch control circuit receives the shutdown signal; and
the first power supply unit is powered off after the energy stored in the energy storage unit is consumed.
CN202110468651.3A 2021-04-28 2021-04-28 Display device and control method thereof Pending CN115249463A (en)

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CN202110468651.3A CN115249463A (en) 2021-04-28 2021-04-28 Display device and control method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110468651.3A CN115249463A (en) 2021-04-28 2021-04-28 Display device and control method thereof

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