CN109510959A - A kind of control method and control system for preventing laser television from overheating - Google Patents
A kind of control method and control system for preventing laser television from overheating Download PDFInfo
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- CN109510959A CN109510959A CN201811268283.2A CN201811268283A CN109510959A CN 109510959 A CN109510959 A CN 109510959A CN 201811268283 A CN201811268283 A CN 201811268283A CN 109510959 A CN109510959 A CN 109510959A
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- control module
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- voltage
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/64—Constructional details of receivers, e.g. cabinets or dust covers
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/63—Generation or supply of power specially adapted for television receivers
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/20954—Modifications to facilitate cooling, ventilating, or heating for display panels
- H05K7/20972—Forced ventilation, e.g. on heat dissipaters coupled to components
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- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Protection Of Static Devices (AREA)
Abstract
The invention discloses a kind of control methods and control system for preventing laser television from overheating, which comprises A, judges whether power down occurs when laser television work；If B, power down occurs for laser television, is powered by power-off protection unit to control module, maintain radiator fan to operate heat extraction certain time by control module, control module enters battery saving mode thereafter；If C, power down does not occur for the laser television; then powered by power panel to the control module; the control module controls radiator fan normal operation heat extraction; by the way that power-off protection unit is added in laser television fan circuit; avoiding laser television, there are the risks that fan stops heat extraction suddenly; it being capable of effective protection laser television; in addition; electricity consumption, which is still needed to, with laser television machine core board when standby mode remains different; after this method shutdown, laser television machine core board does not have power consumption, power consumption zero; to reduce the power consumption of laser television, cost has been saved.
Description
Technical field
The present invention relates to laser television technology field more particularly to a kind of control methods for preventing laser television from overheating
And control system.
Background technique
In recent years, there is biggish advantage in cost, screen size, volume and cost performance due to laser television and obtain
It is fast-developing.So-called laser television is exactly to use solid state laser source, is projected light using reflective ultrashort out-of-focus projection's technology
Projector on to curtain, core component are ray machines, and core element is solid-state laser, when laser television works, solid-state
Laser can generate a large amount of heat, and the aggregation of heat is so that laser television generation heat deterioration, seriously reduces projected image
Image quality, while the service life of laser device can be reduced, therefore, efficient heat dissipation system must be installed inside laser television
System, in particular, laser television is still to maintain the fan heat extraction of a period of time after shutdown.Existing way is, as shown in Figure 1, Fig. 1
Pop-up prompting frame is pressed by button for the first time for existing laser television fan control circuitry figure, ask whether enter " to
Machine " mode, is pressed for the second time, and after fan is run tens seconds, into standby mode, fan stops and turns off unnecessary power supply.
But if someone (such as child) accidentally pulls out power supply line during laser television works, or just have a power failure, fan stops at once
Only, therefore, there are the risks that fan stops heat extraction suddenly for laser television.
Therefore, the existing technology needs to be improved and developed.
Summary of the invention
Based on this, it is necessary in view of the above technical problems, provide a kind of control method and control for preventing laser television from overheating
System processed, by the way that power-off protection unit is added in laser television fan circuit, avoiding laser television, there are fans to stop suddenly
The only risk of heat extraction, can effective protection laser television, in addition, with laser television machine core board when standby mode still need to electricity consumption maintain
Difference, after this method shutdown, laser television machine core board does not have power consumption, power consumption zero.
A kind of control method for preventing laser television from overheating, comprising steps of
A, judge whether power down occurs when laser television work；
If B, power down occurs for laser television, is powered by power-off protection unit to control module, maintain to dissipate by control module
Hot-air fan operates heat extraction certain time, and control module enters battery saving mode thereafter；
If C, power down does not occur for the laser television, powered by power panel to the control module, the control module control
Radiator fan normal operation heat extraction processed.
Ground of the invention further setting, the step A further includes before step A0:
Laser television power supply line accesses power grid when work, while charging to power-off protection unit, and fill after being full of from dynamic circuit breaker.
Further setting, the step A are specifically included on ground of the invention:
A1, the end voltage for obtaining the control module；
A2, judge whether the end voltage of the control module is consistent with the output voltage of the power panel, illustrate not if consistent
Power down occurs；
If the end voltage of A3, the control module is lower than the output voltage of the power panel, illustrate that power down occurs for laser television,
And it is powered at this time by power-off protection unit to the control module.
Further setting, the step C are specifically included on ground of the invention:
C1, button switch is pressed, and the working condition of the relay is judged to judge that user switchs by the control module
Machine is intended to；
If C2, relay are in an off state, illustrate that user needs to be switched on, then control module output relay voltage VJ, make after
Electric appliance closure, and in an ON state, power panel is powered to control module for power panel and power grid at this time, control module output heat dissipation
Fan voltage VF is to maintain radiator fan to run well；
If C3, relay are in closed state, illustrate that user needs to shut down, relay is closed in control module maintenance after a certain period of time
With radiator fan voltage, relay is in an off state after closing, wherein the maintenance period radiator fan still row of normal operation
Heat.
Ground of the invention further setting, the power-off protection unit include charging circuit, lithium battery and for being connected or
The diode of the control module Yu the lithium battery is disconnected, the charging circuit is connect by power supply line with power grid, another
End is connect with the lithium battery, and the lithium battery output voltage is consistent with the power panel output voltage, and the diode connects
It connects between the control module and the lithium battery.
Ground of the invention further setting, the diode there are the decompression of 0.6V, then the power-off protection unit export to
The voltage of the control module is exported lower than the power panel to the voltage of the control module.
Ground of the invention further setting, when laser television works normally, power panel is exported is to the voltage value of control module
12V。
A kind of control system for preventing laser television from overheating, including power panel, radiator fan and button switch further include
Control module, power-off protection unit and the relay for being switched on or switched off power panel and power grid, the control module difference
It is electrically connected with power panel, radiator fan, relay, button switch and power-off protection unit, when laser television works normally, institute
State power panel and give control module power supply, the control module judges the working condition of the relay, and according to it is described after
The working condition of electric appliance is to judge the intentions of laser television switching on and shutting down, if laser television needs to shut down, control module remains certain
It stops working after time, maintains radiator fan during work to work on, if the control module detects generation power down, lead to
It crosses the power-off protection unit to continue to power to the control module, the radiator fan is maintained to work on a period of time,
Control module enters battery saving mode afterwards.
Ground of the invention further setting, the power-off protection unit include charging circuit, lithium battery and for being connected or
Disconnect the diode of the control module Yu the lithium battery, the charging circuit is connect by power supply line with power grid, when work
Laser television power supply line accesses power grid, while being charged by charging circuit to lithium battery, and fill after being full of from dynamic circuit breaker.
Ground of the invention further setting, the diode is connected between the control module and the lithium battery, described
The output voltage of lithium battery exported with the power panel it is consistent to the voltage of the control module, because there are 0.6V for the diode
Decompression, exported lower than the power panel to the control when the power-off protection unit exports the voltage to the control module
When the voltage of module, then illustrate that power down occurs for laser television.
A kind of above-mentioned control method and control system for preventing laser television from overheating, the method includes the steps: A0, work
Laser television power supply line accesses power grid when making, while charging to power-off protection unit, and fill after being full of from dynamic circuit breaker；A, judgement swashs
Whether power down occurs when light television operations；If B, power down occurs for laser television, supplied by power-off protection unit to control module
Electricity maintains radiator fan to operate heat extraction by control module, and control module enters battery saving mode thereafter；If the C, laser television
Power down does not occur, then is powered by power panel to the control module, the control module control radiator fan, which runs well, to be arranged
Heat avoids laser television and stops arranging suddenly there are fan by the way that power-off protection unit is added in laser television fan circuit
Heat risk, can effective protection laser television, in addition, with laser television machine core board when standby mode still need to electricity consumption maintain not
Together, after this method shutdown, laser television machine core board does not have power consumption, power consumption zero, to reduce the power consumption of laser television, saves
About cost.
Detailed description of the invention
Fig. 1 is fan control circuitry schematic diagram in the control system of conventional laser TV；
Fig. 2 is a kind of flow diagram for the control method for preventing laser television from overheating in one embodiment；
Fig. 3 is a kind of control flow schematic diagram for the control method for preventing laser television from overheating in one embodiment；
Fig. 4 is fan control circuitry schematic diagram in the control system for preventing laser television from overheating a kind of in one embodiment.
Appended drawing reference
1, power panel；2, button switch；3, radiator fan；4, power supply line；5, relay；200, power-off protection unit；21, it charges
Circuit；22, lithium battery；23, diode；210, control module.
Specific embodiment
To make the objectives, technical solutions, and advantages of the present invention clearer and more explicit, right as follows in conjunction with drawings and embodiments
The present invention is further described.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and do not have to
It is of the invention in limiting.
In one embodiment, as shown in Fig. 2, providing a kind of control method for preventing laser television from overheating, including with
Lower step:
Plug accesses power grid when S100, work, and charging circuit gives lithium battery charging, full of filling from dynamic circuit breaker；
Specifically, relay default disconnects when no electricity, and laser television do not work, laser television power supply line access 220V electricity when work
Net, charging circuit charges to lithium battery, and fills after being full of from dynamic circuit breaker, after lithium battery is fully charged, so that laser television is fallen
Lithium battery is powered to control module when electric.
S110, judge whether laser television occurs power down；
Specifically, the end voltage of the control module is obtained, if the output voltage of the end voltage and power panel of the control module
Unanimously, then illustrate that power down does not occur, if the end voltage of the control module is lower than the output voltage of power panel, illustrate laser electricity
It is powered by power-off protection unit to the control module depending on power down occurs, and at this time.
Wherein, the power-off protection unit includes charging circuit, lithium battery and for the control mould that is turned on or off
The diode of block and the lithium battery, the charging circuit are electrically connected by power supply line with power grid, the other end and lithium electricity
Pond electrical connection, the lithium battery output voltage is consistent with the power panel output voltage, and power panel is exported to the electricity of control module
Pressure value is 12V, and the diode is connected between the control module and the lithium battery, and there are the drops of 0.6V for the diode
Pressure, then the power-off protection unit is exported exports lower than the power panel to the control module to the voltage of the control module
Voltage, if the unexpected power down of 220V, power panel 12V are connected automatically without output, diode, lithium battery 12V through diode to control
Module for power supply processed, since diode is there are the pressure drop of 0.6V, control module end voltage is 11.4V, judges whether to occur based on this
Power down: if control module end voltage is 12V, illustrating to work normally, if control module end voltage is 11.4V or lower, says
Bright generation power down.
If power down occurs for S120, laser television, is powered by power-off protection unit to control module, pass through control module
Radiator fan is maintained to operate heat extraction certain time, control module enters battery saving mode thereafter；
Specifically, diode is connected automatically after power down occurs for laser television, is powered by lithium battery to control module, control module
Output radiator fan voltage 20 seconds is only maintained, to make fan running heat extraction, protects laser television, later, control module enters
Battery saving mode.
If power down does not occur for S130, the laser television, powered by power panel to the control module, the control
Module controls radiator fan normal operation heat extraction；
Specifically, when pressing button switch, if relay is in " closed " state, illustrates that user wants shutdown, then control
Module stops working after maintaining radiator fan to work 20 seconds, and relay disconnects, with laser electricity when standby mode in the prior art
Electricity consumption is still needed to depending on machine core board and remains different, and after this method shutdown, laser television machine core board does not have power consumption, power consumption zero.
When pressing button switch, if relay is in " disconnected " state, illustrate that user wants booting, control module is defeated
Relay voltage out, relay are attracted, and power grid accesses power panel, and power panel exports 12V and other operating voltages, diode are reverse-biased
Cut-off, power panel 12V power to control module, and control module exports fan voltage, and radiator fan operates heat extraction.
The present invention is described further below, referring to Fig. 3, its working principles are as follows:
S00, beginning；
Plug accesses power grid when S10, work, and charging circuit gives lithium battery charging, full of filling from dynamic circuit breaker；
S20, judge whether laser television occurs power down, it is no to then follow the steps S50 if so then execute step S30, S40；
S30, power-off protection unit are powered to control module, and control module maintains output fan voltage for a period of time, fan running
Laser television is protected in heat extraction, and later, control module enters battery saving mode；
S40, laser television off-mode；
S50, judge whether to press button switch, if so then execute step S60, otherwise return step S20；
S60, judge relay working condition, if relay is in " closed " state, S70, S80 are thened follow the steps, if relay
In " disconnected " state, S90, S100 are thened follow the steps；
S70, control module maintain radiator fan to work 20 seconds, close fan voltage and relay voltage later, and relay disconnects,
Maintenance period fan still operates heat extraction, protects laser television；
S80, laser television are in off-mode；
S90, control module output relay voltage, relay are attracted, and power grid accesses power panel, and power panel exports 12V and other
Operating voltage, the reverse-biased cut-off of diode, power panel 12V power to control module, and control module exports fan voltage, radiator fan
Operate heat extraction；
S100, laser television are in normal operating conditions, and return step S20；
S110, end.
The present embodiment it is a kind of prevent laser television overheat control method, no matter which kind of reason, as long as 220V power down,
Energy trigger protection circuit work, i.e., by the way that power-off protection unit is added in laser television fan control circuitry, even if laser is electric
After power down occurs, lithium battery remains to continue power supply a period of time to control module, to guarantee that fan works on a period of time,
Heat is discharged, is then automatically stopped, avoids laser television there are the risk that radiator fan stops heat extraction suddenly, effective protection swashs
Photoelectricity view, in addition, still needing to electricity consumption with laser television machine core board when standby mode remains different, laser television after laser television shutdown
It is still connect with power grid, there are stand-by power consumptions, and after this method shutdown, relay is in " disconnected " state, i.e. laser television power panel
It being disconnected with power grid, i.e., laser television machine core board does not have power consumption, power consumption zero, so that the power consumption of laser television is reduced,
Cost is saved.
In one embodiment, a kind of control system for preventing laser television from overheating is provided, as shown in figure 4, Fig. 4 is this
Fan control circuitry schematic diagram, including power panel 1, radiation air in a kind of control system for preventing laser television from overheating in embodiment
Fan 3 and button switch 2, further include control module 210, power-off protection unit 200 and for be switched on or switched off power panel 1 with
The relay 5 of power grid, the control module 210 respectively with power panel 1, radiator fan 3, relay 5, button switch 2 and disconnected
Electric protection unit 200 is electrically connected.
Wherein, when laser television works normally, the power panel 1 is powered to the control module 210, the control module
210 judge the working condition of the relay 5, and according to the working condition of the relay 5 to judge laser television switching on and shutting down
Intention, if laser television needs to shut down, control module 210 maintain 20 seconds after stop working, maintain work during radiator fan 3
It works on, if the control module 210 detects generation power down, is continued by the power-off protection unit 200 to described
Control module 210 is powered, and the radiator fan 3 is maintained to work on 20 seconds, and control module 210 enters battery saving mode thereafter.
Further, the power-off protection unit 200 is including charging circuit 21, lithium battery 22 and for being turned on or off
The diode 23 of the control module 210 and the lithium battery 22, the diode 23 are switch diode, in this application
Select the small power switch diode of the models such as 1N4148,1N4152,1N4151, the charging circuit 21 by power supply line 4 with
Power grid electrical connection, laser television power supply line 4 accesses power grid when work, while giving the charging of lithium battery 22 by charging circuit 21, and
And it is filled after being full of from dynamic circuit breaker.
Further, the control module 210 further includes the drive control circuit of relay 5 Yu radiator fan 3.
Specifically, when pressing button switch 2, and detecting that relay 5 is in " disconnected " state, control module 210 is defeated
Relay voltage VJ out, relay 5 are attracted, and power grid is made to access power panel 1, and power panel 1 exports 12V and other operating voltages, and two
The reverse-biased cut-off of pole pipe 23 is equivalent to lithium battery 22 vacantly, and power panel 1 exports 12V and powers to control module 210, control module 210
Fan voltage VF is exported, 3 drive control circuit of radiator fan drives radiator fan 3 to operate heat extraction.
Further, the diode 23 is connected between the control module 210 and the lithium battery 22, the lithium electricity
The output voltage in pond 22 exported with the power panel 1 it is consistent to the voltage of the control module 210, because the diode 23 exist
The decompression of 0.6V, when the power-off protection unit 200 output is defeated lower than the power panel 1 to the voltage of the control module 210
When out to the voltage of the control module 210, then illustrate that power down occurs for laser television.
Specifically, after power down occurs for laser television, i.e. 220V power down, power panel 1 is led automatically without output, diode 23
Logical, lithium battery 22 exports 12V and powers through diode 23 to control module 210, since there are the pressure drop of 0.6V, controls for diode 23
210 end voltage of module is 11.4V, judges whether that power down occurs based on this: if 210 end voltage of control module is 12V, illustrating just
Often work if 210 end voltage of control module is 11.4V or lower illustrates that power down occurs.
A kind of control system for preventing laser television from overheating of the present embodiment, the default of relay 5 disconnects when no electricity, laser electricity
Depending on not entering working condition, laser television power supply line 4 accesses 220V power grid when work, and charging circuit 21 gives the charging of lithium battery 22,
Full of filling from dynamic circuit breaker, when laser television is in running order, 23 both ends of diode are 12V, and diode 23 ends, and are equivalent to lithium
Battery 22 is hanging, is powered at this time by power panel 1, and after pressing button switch 2, the machine if user looks on the bright side of things, control module 210 is defeated
5 voltage VJ of relay out, relay 5 are attracted, and power grid accesses power panel 1, and power panel 1 exports 12V and other operating voltages, power supply
Plate 1 exports 12V and powers to control module 210, and control module 210 exports fan voltage VF, and radiator fan 3 operates heat extraction, if with
Family is wanted to shut down, and control module 210 maintains work 20 seconds, closes fan voltage and 5 voltage of relay later, and relay 5 disconnects, dimension
Radiator fan 3 still operates heat extraction during holding, and avoids laser television there are the risk that radiator fan 3 stops heat extraction suddenly, has
Effect protection laser television, after this method shutdown, relay 5 is in " disconnected " state, i.e. laser television power panel 1 and power grid disconnects
Connection, i.e., laser television machine core board does not have power consumption, and power consumption zero has saved cost to reduce the power consumption of laser television.
The several embodiments of the application above described embodiment only expresses, the description thereof is more specific and detailed, but simultaneously
It cannot therefore be construed as limiting the scope of the patent.It should be pointed out that coming for those of ordinary skill in the art
It says, without departing from the concept of this application, various modifications and improvements can be made, these belong to the protection of the application
Range.Therefore, the scope of protection shall be subject to the appended claims for the application patent.
Claims (10)
1. a kind of control method for preventing laser television from overheating, which is characterized in that comprising steps of
A, judge whether power down occurs when laser television work；
If B, power down occurs for laser television, is powered by power-off protection unit to control module, maintain to dissipate by control module
Hot-air fan operates heat extraction certain time, and control module enters battery saving mode thereafter；
If C, power down does not occur for the laser television, powered by power panel to the control module, the control module control
Radiator fan normal operation heat extraction processed.
2. a kind of control method for preventing laser television from overheating according to claim 1, which is characterized in that the step A
Before further include step A0:
Laser television power supply line accesses power grid when work, while charging to power-off protection unit, and fill after being full of from dynamic circuit breaker.
3. a kind of control method for preventing laser television from overheating according to claim 1, which is characterized in that the step A
It specifically includes:
A1, the end voltage for obtaining the control module；
A2, judge whether the end voltage of the control module is consistent with the output voltage of the power panel, illustrate not if consistent
Power down occurs；
If the end voltage of A3, the control module is lower than the output voltage of the power panel, illustrate that power down occurs for laser television,
And it is powered at this time by power-off protection unit to the control module.
4. a kind of control method for preventing laser television from overheating according to claim 1, which is characterized in that the step C
It specifically includes:
C1, the button switch is pressed, and judges the working condition of the relay to judge user by the control module
Switching on and shutting down are intended to；
If C2, the relay are in an off state, illustrate that user needs to be switched on, then the control module output relay voltage
VJ is closed the relay, and in an ON state, power panel is powered to control module for the power panel and power grid at this time,
The control module output radiator fan voltage VF is to maintain radiator fan to run well；
If C3, the relay are in closed state, illustrate that user needs to shut down, the control module maintenance is closed after a certain period of time
The voltage for closing the relay Yu the radiator fan, the relay is in an off state after closing, wherein maintenance period dissipates
Hot-air fan still runs well heat extraction.
5. a kind of control method for preventing laser television from overheating according to claim 1, which is characterized in that the power-off is protected
Shield unit includes charging circuit, lithium battery and the diode for the be turned on or off control module and the lithium battery,
The charging circuit is connect by power supply line with power grid, and the other end is connect with the lithium battery, the lithium battery output electricity
Pressure is consistent with the power panel output voltage, and the diode is connected between the control module and the lithium battery.
6. a kind of control method for preventing laser television from overheating according to claim 5, which is characterized in that the diode
There are the decompression of 0.6V, then the power-off protection unit export the voltage to the control module lower than the power panel export to
The voltage of the control module.
7. a kind of control method for preventing laser television from overheating according to claim 6, which is characterized in that laser television is just
Often when work, it is 12V that the power panel, which is exported to the voltage value of the control module,.
8. a kind of control system for preventing laser television from overheating, including power panel, radiator fan and button switch, feature exist
In further including control module, power-off protection unit and the relay for being switched on or switched off power panel and power grid, the control
Module is electrically connected with power panel, radiator fan, relay, button switch and power-off protection unit respectively, and laser television is normal
When work, the power panel is powered to the control module, and the control module judges the working condition of the relay, and root
The intention of laser television switching on and shutting down is judged according to the working condition of the relay, if laser television needs to shut down, control module
Maintenance stops working after a certain period of time, maintains radiator fan during work to work on, if the control module detects generation
Power down then continues to power to the control module by the power-off protection unit, and the radiator fan is maintained to work on one
The section time, control module enters battery saving mode thereafter.
9. a kind of control system for preventing laser television from overheating according to claim 8, which is characterized in that the power-off is protected
Shield unit includes charging circuit, lithium battery and the diode for the be turned on or off control module and the lithium battery,
The charging circuit connect by power supply line with power grid, and laser television power supply line accesses power grid when work, while electric by charging
Road is charged to the lithium battery, and is filled after being full of from dynamic circuit breaker.
10. a kind of control system for preventing laser television from overheating according to claim 9, which is characterized in that two pole
Pipe is connected between the control module and the lithium battery, and the output voltage of the lithium battery and the power panel are exported to institute
The voltage for stating control module is consistent, because there are the decompressions of 0.6V for the diode, when the power-off protection unit is exported to described
When the voltage of control module exports the voltage to the control module lower than the power panel, then illustrate that laser television is fallen
Electricity.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111901649A (en) * | 2020-08-13 | 2020-11-06 | 海信视像科技股份有限公司 | Video playing method and display equipment |
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| CN101489071A (en) * | 2008-01-15 | 2009-07-22 | 深圳市科创数字显示技术有限公司 | System for preventing optical projection television from abnormal shutdown and implementing method thereof |
| CN202334731U (en) * | 2011-11-09 | 2012-07-11 | 上海广擎光电科技有限公司 | Heat dissipation protection device for microcrystal optical display rear-projection television |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111901649A (en) * | 2020-08-13 | 2020-11-06 | 海信视像科技股份有限公司 | Video playing method and display equipment |
| CN111901649B (en) * | 2020-08-13 | 2022-03-25 | 海信视像科技股份有限公司 | Video playing method and display equipment |
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