CN110049264B - Laser television power supply control system and method - Google Patents
Laser television power supply control system and method Download PDFInfo
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- CN110049264B CN110049264B CN201910245624.2A CN201910245624A CN110049264B CN 110049264 B CN110049264 B CN 110049264B CN 201910245624 A CN201910245624 A CN 201910245624A CN 110049264 B CN110049264 B CN 110049264B
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- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
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- H04N5/63—Generation or supply of power specially adapted for television receivers
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Abstract
The invention discloses a power supply control system and a power supply control method for a laser television, wherein the system comprises: the system comprises a power panel, a television signal panel, a fan control CPU module, a DMD digital light processing technology panel, a fan, a power management module, a power conversion management module and a power conversion module; the power management module is used for providing power supply for the television signal board and logic control of power supply in standby and starting lamp states; the power supply conversion management module is used for supplying power to the DMD digital optical processing technical board and the fan; the power supply conversion module is used for supplying power to the fan control CPU module; the fan control CPU module is used for controlling the plurality of fans to enter a normal working state, the working temperature is in a normal range, and the DMD digital light processing technical board controls the optical machine and the color wheel to enter the working state. The invention controls the light machine and the color wheel to work when the fan is in an effective working state by performing time sequence control on the power supply of the laser television, thereby ensuring that the laser television is in a stable working environment.
Description
Technical Field
The invention relates to the technical field of intelligent televisions, in particular to a power supply control system and method for a laser television.
Background
The laser television as a new television product has the advantages of convenience, lower cost and the like in the aspect of large size compared with the traditional television, and particularly, the television with the new form is gradually accepted by the market due to the appearance of the 4K laser television. The service life of the optical machine and the color wheel in the laser television is influenced by the temperature, and the service life of the optical machine and the color wheel is directly influenced by the ambient temperature, so that the service life and the reliability of the laser television are directly related.
In order to enable the laser television to work in a stable and reliable working environment, measures such as temperature control, a cooling fan and the like are generally carried out in the laser television, but due to uncertain faults possibly occurring in the whole system, the temperature control protection of the laser television cannot be further improved, namely the temperature control protection of the existing laser television needs to be further enhanced.
Accordingly, the prior art is yet to be improved and developed.
Disclosure of Invention
The invention provides a power supply control system and method for a laser television, aiming at solving the technical problem that the power supply of the laser television is controlled in a time sequence mode, so that a system optical machine and a color wheel are allowed to work when a fan is in an effective working state, the core component of the laser television is ensured to be in a stable working environment, and the protection reliability of the laser television is improved.
The technical scheme adopted by the invention for solving the technical problem is as follows:
a laser television power supply control system, wherein the laser television power supply control system comprises: the system comprises a power panel, a television signal panel, a fan control CPU module, a DMD digital light processing technology panel, a fan, a power management module, a power conversion management module and a power conversion module;
the power supply management module is used for providing power supply for the television signal board and logic control of power supply in standby and starting lamp states; the power supply conversion management module is used for supplying power to the DMD digital optical processing technical board and the fan; the power supply conversion module is used for supplying power to the fan control CPU module;
the said fan control CPU module is used for controlling the said fans to enter the normal working state, and the working temperature is in the normal range, the said DMD digital light processing technology board controls the optical machine and color wheel to enter the working state.
The laser television power supply control system further comprises a switch circuit connected with the power panel and the power conversion module respectively, and the switch circuit is used for controlling voltage input according to level.
The laser television power supply control system further comprises an AND logic circuit which is respectively connected with the power panel, the television signal panel and the fan control CPU module, and the AND logic circuit is used for controlling and outputting a high level or a low level.
The laser television power supply control system further comprises a temperature sensor connected with the fan control CPU module, and the temperature sensor is used for detecting the temperature of a preset key part and sending the temperature to the fan control CPU module;
and the voltage conversion module is connected with the power panel and is used for converting the first voltage value output by the power panel into a second voltage value.
A laser television power supply control method based on the laser television power supply control system comprises the following steps:
the power supply conversion module supplies power to the fan control CPU module according to the voltage output by the power supply board;
after the fan control CPU module supplies power, the fans are controlled to enter a normal working state, and temperature data detected by the temperature sensors are received;
and when the fan control CPU module judges that the working temperature is in a normal range, the DMD digital light processing technical board controls the optical machine and the color wheel to enter a working state.
The laser television power supply control method comprises the following steps:
when the power panel provides alternating current and PWR _ ON is at low level, the power panel is in a light-load high-efficiency mode and only provides 12V power supply, and the power supply object is the television signal panel;
when PWR _ ON is high level, the 12V for supplying power to the television signal board is in normal mode;
when the PWR _ ON is at a high level and the MCU _ CTR _ ON is at a high level, the power panel also outputs 50V to be provided for the power amplifier power supply conversion power supply and the power supply conversion management module to supply power so as to provide power for the shutdown signal processing panel.
The laser television power supply control method comprises the following steps:
when the system is in a standby state, the power panel is in a light load mode, and the power management module provides 12V in the light load mode to supply power to the television signal panel;
when the system enters a starting-up state, the system starts up a starting-up logic, and the power management module provides power needed by the power supply work of the television signal board;
the television signal board sets PWR _ ON to be high level, the power panel provides stable 12V power supply required by normal work, and meanwhile, when the PWR _ ON is high level, the input voltage of the power conversion module starts to supply power and the voltage is 12V;
the power supply conversion module starts to supply power to the fan control CPU module, controls the fan to rotate, and receives the temperature of a preset key part detected by the temperature sensor;
when the temperature is normal, setting MCU _ ON and FB _ ON to be high level, and setting PWR _ ON and MB _ ON to be high level by the television signal plate;
the input end of the AND logic circuit is high level, the MCU _ CTR _ ON after passing through the AND logic circuit is also high level, and the power panel starts to output 50V for power supply when in the MCU _ CTR _ ON state;
when the power supply of the power amplifier of the television signal board is 20V, converting 50V into 20V through a voltage conversion module, and starting to supply power to the power amplifier of the television signal board;
the television signal board initializes the power amplifier and sets a working state, FB _ ON is high level, and 50V normally supplies power to the power supply conversion management module;
and the DMD digital optical processing technical board starts to work, and the television signal board and the DMD digital optical processing technical board are in data communication.
The laser television power supply control method comprises the following steps:
when the system is in a full-time AI state or in a single listening state, the television signal board is in a normal working state, the screen is not displayed, the fan control CPU module sets FB _ ON to be a low level, the power supply conversion management module does not provide power supply, and the DMD digital light processing technical board does not work.
The laser television power supply control method comprises the following steps:
when the fan cannot be normal due to faults or the working state is abnormal, the fan control CPU module controls MCU _ ON and FB _ ON to be at a low level, the power panel does not provide 50V power supply, and the DMD digital light processing technical panel does not work.
The laser television power supply control method comprises the following steps:
after the system starts to operate, judging whether the temperature control fan system works normally or not, if not, setting the MCU _ ON to be a low level, and returning an abnormal value to a television signal board; if the television signal board normally works, receiving the current working state of the television signal board, judging whether the television signal board currently enters a standby state, if so, setting the MCU _ ON to be a low level, and ending; if not, continuously detecting whether the system is in a full-time AI state, if so, setting FB _ ON to be a low level and ending; if not, setting FB _ ON to be high level and then ending;
after the system is powered ON and started, judging whether the system needs to enter a standby state, if so, setting PWR _ ON and MB _ ON to be low level and ending; and if not, setting PWR _ ON to be at a high level, running a starting process, setting MB _ ON to be at the high level, acquiring the current starting state, sending the current state to the fan control MCU module, and ending.
The invention discloses a power supply control system and a power supply control method for a laser television, which are characterized in that a heat dissipation system is started preferentially, core components such as an optical machine and a color wheel of the laser television are allowed to work when the heat dissipation system is in a normal working state and the working temperature around the core components is in a design state, and therefore the reliability of protection of the laser television is improved.
Drawings
FIG. 1 is a functional schematic diagram of a laser television power supply control system according to the present invention;
FIG. 2 is a flow chart of a preferred embodiment of a laser television power control method of the present invention;
FIG. 3 is a schematic diagram illustrating a work flow of a CPU module for controlling a fan in a preferred embodiment of the power supply control method of a laser television according to the present invention;
fig. 4 is a schematic diagram of the operation flow of the television signal board in the preferred embodiment of the power supply control method of the laser television of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer and clearer, the present invention is further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
As shown in fig. 1, the power supply control system for a laser television according to the preferred embodiment of the present invention includes:
a power management module 1, a power conversion management module 2, a power conversion module 3, a power board 4, a television signal board 5, a fan control CPU module 7, a DMD digital light processing technology board 11, and a fan 12 (the fan may include a plurality of fans, such as fan 1, fan 2, and fan 3 in fig. 1);
the power management module 1 is used for providing power supply for the television signal panel 5 and logic control of power supply in standby and power-on states; the power conversion management module 2 is used for supplying power to the DMD digital light processing technology board 11 and the fan 12; the power supply conversion module 3 is used for supplying power to the fan control CPU module 7;
the fan control CPU module 7 is configured to control the fans 12 to enter a normal working state, and the working temperature is within a normal range, and the dmd (digital Light processing) digital Light processing technology board 11 controls the optical engine 13 and the color wheel 14 to enter the working state.
Further, the laser television power supply control system further comprises a switch circuit 9 respectively connected with the power panel 4 and the power conversion module 3, and the switch circuit 9 is used for controlling voltage input according to the level.
Further, the laser television power supply control system further comprises an and logic circuit 8 respectively connected with the power panel 4, the television signal panel 5 and the fan control CPU module 7, wherein the and logic circuit 8 is used for controlling to output a high level or a low level.
Further, the laser television power supply control system further comprises a temperature sensor 6 connected with the fan control CPU module 7, wherein the temperature sensor 6 is configured to detect a temperature of a preset key part and send the temperature to the fan control CPU module 7;
and the voltage conversion module 10 is connected with the power panel 4, and the voltage conversion module 10 is used for converting the first voltage value output by the power panel 4 into a second voltage value.
The first voltage value is preferably 50V, and the second voltage value is preferably 12V.
Based on the above laser television power supply control system (fig. 1), the present invention also provides a laser television power supply control method, as shown in fig. 2, the laser television power supply control method includes the following steps:
step S10, the power conversion module 3 supplies power to the fan control CPU module 7 according to the voltage output by the power board 4;
step S20, after the CPU module 7 is powered on, controlling the plurality of fans 12 to enter a normal operating state, and receiving temperature data detected by the temperature sensor 6;
step S30, when the CPU module 7 for fan control determines that the operating temperature is in the normal range, the DMD digital light processing technology board 11 controls the optical engine 13 and the color wheel 14 to enter the operating state.
The purpose is that the system light machine is allowed to work when the fan is in an effective working state by carrying out time sequence control on the power supply of the laser television, so that the stable working environment of the core component of the laser television is ensured.
The working state of the power panel 4 is as follows: when ac power is supplied and PWR _ ON is low, the power panel 4 is in light-load high-efficiency mode and only 12V power is supplied, which is supplied to the telepanel 5. When PWR _ ON is high, 12V supplying power to the television signal panel 5 is a normal mode; when the PWR _ ON is at a high level and the MCU _ CTR _ ON is at a high level, the power board 4 also outputs 50V to provide power for the power amplifier and the power conversion management module 2 to provide power for the shutdown signal processing board.
Further, the system specific logic is as follows: when the system is in a standby state, the power panel 4 is in a light load mode, the power management module 1 for the television signal panel supplies 12V power in the light load mode, the power management module 1 uses DC-DC in a light load high-efficiency mode to respectively supply power to the television signal panel 5, and at this time, PWR _ ON, MCU _ CTR _ ON, MCU _ ON and MB _ ON are all low level.
Specifically, when the system enters a power-ON state, the system starts a power-ON logic, the power management module 1 provides power required by the power supply operation of the television signal board 5, the television signal board 5 sets PWR _ ON to a high level, at this time, the power board 4 provides stable 12V power required by normal operation, and meanwhile, when the PWR _ ON is at the high level, the input voltage of the power conversion module 3 starts to supply power, the voltage is 12V, the power conversion module 3 starts to supply power to the fan control CPU module 7, controls the fan 12 to rotate, and receives the temperature detected by the temperature sensor 6 for a key part.
During normal operation, setting MCU _ ON and FB _ ON to high level, after PWR _ ON is set to high level, setting MB _ ON to high level by the television signal board 5, at this time, both the input end of the and logic circuit 8 is high level, and MCU _ CTR _ ON after passing through the and logic circuit 8 is also high level, when the power supply board 4 is in MCU _ CTR _ ON state, starting to output 50V power supply, when the power supply of the power amplifier of the television signal board 5 is 20V, starting to supply power to the power amplifier of the television signal board 5 by converting DC-DC of 50V to 20V through the voltage conversion module 10, and initializing the power amplifier by the television signal board 5 and setting working state; because FB _ ON is already at a high level, 50V can normally supply power to the power conversion management module 2, the DMD dsp board 11 starts to operate, and the tv signal board 5 communicates data (via data signals and control signals) with the DMD dsp board 11.
When the system is in the full-time AI state or in the single listening state (the screen is closed and the sound is played continuously), since the tv signal board 5 is in the normal working state at this time, the screen does not need to be displayed, at this time, the fan control CPU module 7 sets FB _ ON to the low level, at this time, the power conversion management module 2 does not provide power, and the DMD digital light processing technology board does not work.
When the system fan is abnormal or the working state is abnormal due to the failure rate, the fan control CPU module 7 controls the MCU _ ON and the FB _ ON to be at a low level, and at this time, the power panel 4 does not provide 50V power; the DMD digital light processing technology board 11 does not operate, thereby ensuring a startup or a work flow, and the optical engine 13 and the color wheel 14 operate only under the condition that the temperature control system is normal, thereby improving the reliability of the temperature control protection of the optical engine 13 and the color wheel 14.
Further, as shown in fig. 3, the work flow of the fan control CPU module is as follows:
step S101, starting to operate a system;
step S102, judging whether the temperature control fan system works normally or not after the system starts to run; when yes, step S105 is performed, and when no, step S103 is performed;
step S103, if the temperature control fan system does not work normally, setting MCU _ ON to be low level;
step S104, returning the abnormal value to the television signal board;
step S105, if the temperature control fan system works normally, receiving the current working state of the television signal board;
step S106, judging whether the current state needs to be in a standby state; when yes, step S109 is executed, and when no, step S107 is executed;
step S107, continuously detecting whether the system is in a full-time AI state, if so, executing step S110, and if not, executing step S108;
step S108, setting FB _ ON to a high level;
step S109, setting MCU _ ON to be low level;
step S110, setting FB _ ON to be low level;
and step S111, ending.
Further, as shown in fig. 4, the operation flow of the television signal board is as follows:
step S201, powering on and starting up a system;
step S202, after the system is powered on, judging whether the system needs to enter a standby state; if yes, executing step S203, and if no, executing step S204;
step S203, setting PWR _ ON, MB _ ON to low level;
step S204, setting PWR _ ON to high level;
step S205, running a starting-up process;
step S206, setting MB _ ON to high level;
step S207, sending the current state to a fan control MCU module;
and S208, ending.
According to the invention, the cooling system is started preferentially, the cooling system is in a normal working state, and the core components such as the optical machine of the laser television are allowed to work when the working temperature around the core components is in a design state, so that the reliability of laser television protection is improved.
In summary, the present invention provides a power supply control system and method for a laser television, wherein the system includes: the system comprises a power panel, a television signal panel, a fan control CPU module, a DMD digital light processing technology panel, a fan, a power management module, a power conversion management module and a power conversion module; the power supply management module is used for providing power supply for the television signal board and logic control of power supply in standby and starting lamp states; the power supply conversion management module is used for supplying power to the DMD digital optical processing technical board and the fan; the power supply conversion module is used for supplying power to the fan control CPU module; the said fan control CPU module is used for controlling the said fans to enter the normal working state, and the working temperature is in the normal range, the said DMD digital light processing technology board controls the optical machine and color wheel to enter the working state. The invention ensures that the system optical machine and the color wheel work only when the fan is in an effective working state by carrying out time sequence control on the power supply of the laser television, thereby ensuring that the core components of the laser television are in a stable working environment.
Of course, it will be understood by those skilled in the art that all or part of the processes of the methods of the above embodiments may be implemented by a computer program instructing relevant hardware (such as a processor, a controller, etc.), and the program may be stored in a computer readable storage medium, and when executed, the program may include the processes of the above method embodiments. The storage medium may be a memory, a magnetic disk, an optical disk, etc.
It is to be understood that the invention is not limited to the examples described above, but that modifications and variations may be effected thereto by those of ordinary skill in the art in light of the foregoing description, and that all such modifications and variations are intended to be within the scope of the invention as defined by the appended claims.
Claims (8)
1. A laser television power supply control system is characterized by comprising: the system comprises a power panel, a television signal panel, a fan control CPU module, a DMD digital light processing technology panel, a fan, a power management module, a power conversion management module and a power conversion module;
the power supply management module is used for providing power supply for the television signal board and logic control of power supply in standby and starting lamp states; the power supply conversion management module is used for supplying power to the DMD digital optical processing technical board and the fan; the power supply conversion module is used for supplying power to the fan control CPU module;
the fan control CPU module is used for controlling the fans to enter a normal working state, the working temperature is in a normal range, and the DMD digital light processing technical board controls the optical machine and the color wheel to enter the working state;
the laser television power supply control system also comprises a switch circuit which is respectively connected with the power panel and the power conversion module, and the switch circuit is used for controlling voltage input according to the level; when the system enters a starting-up state, the system starts a starting-up logic, the power management module provides power needed by power supply work of the television signal board, the television signal board sets a PWR _ ON signal to be a high level, the power board provides stable 12V power needed by normal work, meanwhile, when the PWR _ ON signal is the high level, the input voltage of the power conversion module starts to supply power, the voltage is 12V, the power conversion module starts to supply power to the fan control CPU module and controls the fan to rotate;
the laser television power supply control system also comprises an AND logic circuit which is respectively connected with the power panel, the television signal panel and the fan control CPU module, and the AND logic circuit is used for controlling and outputting a high level or a low level;
the laser television power supply control system also comprises a voltage conversion module connected with the power panel, wherein the voltage conversion module is used for converting a first voltage value output by the power panel into a second voltage value; when the television signal board is in a normal state, setting an MCU _ ON signal and an FB _ ON signal to be at a high level, setting an MB _ ON signal to be at the high level after the PWR _ ON signal is set to be at the high level by the television signal board, setting the MB _ ON signal to be at the high level at the same time, wherein the input end of the AND logic circuit is at the high level, and the MCU _ CTR _ ON signal passing through the AND logic circuit is also at the high level;
when the system is in a full-time AI state or in a single listening state, the television signal board is in a normal working state, a screen does not need to display, the fan controls the CPU module to set an FB _ ON signal to be a low level, the power supply conversion management module does not provide power supply, and the DMD digital optical processing technical board does not work;
when the system fan cannot be normal or the working state is abnormal due to the failure rate, the fan control CPU module controls the MCU _ ON signal and the FB _ ON signal to be at low level, and the power panel does not provide 50V power supply; the DMD digital light processing technical board does not work, starting or working flow is guaranteed, and the optical machine and the color wheel work only under the condition that the temperature control system is normal.
2. The laser television power supply control system according to claim 1, further comprising a temperature sensor connected to the fan control CPU module, wherein the temperature sensor is configured to detect a temperature of a preset critical portion and send the temperature to the fan control CPU module.
3. A laser television power supply control method based on the laser television power supply control system of any one of claims 1-2, wherein the laser television power supply control method comprises:
the power supply conversion module supplies power to the fan control CPU module according to the voltage output by the power supply board;
after the fan control CPU module supplies power, the fans are controlled to enter a normal working state, and temperature data detected by the temperature sensors are received;
and when the fan control CPU module judges that the working temperature is in a normal range, the DMD digital light processing technical board controls the optical machine and the color wheel to enter a working state.
4. The laser television power supply control method according to claim 3, further comprising:
when the power panel provides alternating current and the PWR _ ON signal is at a low level, the power panel is in a light-load high-efficiency mode and only provides 12V power supply, and the power supply object is the television signal panel;
when the PWR _ ON signal is in a high level, the 12V power supply for the television signal board is in a normal mode;
when the PWR _ ON signal is at a high level and the MCU _ CTR _ ON signal is at a high level, the power panel also outputs 50V to the power amplifier power supply conversion power supply and the power supply conversion management module to supply power to the shutdown signal processing panel.
5. The laser television power supply control method according to claim 4, further comprising:
when the system is in a standby state, the power panel is in a light load mode, and the power management module provides 12V in the light load mode to supply power to the television signal panel;
when the system enters a starting-up state, the system starts up a starting-up logic, and the power management module provides power needed by the power supply work of the television signal board;
the television signal board sets the PWR _ ON signal to be at a high level, the power panel provides stable 12V power supply required by normal work, and meanwhile, when the PWR _ ON signal is at the high level, the input voltage of the power conversion module starts to supply power and the voltage is 12V;
the power supply conversion module starts to supply power to the fan control CPU module, controls the fan to rotate, and receives the temperature of a preset key part detected by the temperature sensor;
when the temperature is normal, setting the MCU _ ON signal and the FB _ ON signal to be high level, and setting the PWR _ ON signal and the MB _ ON signal to be high level by the television signal board;
the input end of the AND logic circuit is high level, the MCU _ CTR _ ON signal passing through the AND logic circuit is also high level, and the power panel starts to output 50V for power supply when the MCU _ CTR _ ON signal is high level;
when the power supply of the power amplifier of the television signal board is 20V, converting 50V into 20V through a voltage conversion module, and starting to supply power to the power amplifier of the television signal board;
the television signal board initializes the power amplifier and sets a working state, the FB _ ON signal is at a high level, and 50V normally supplies power to the power supply conversion management module;
and the DMD digital optical processing technical board starts to work, and the television signal board and the DMD digital optical processing technical board are in data communication.
6. The laser television power supply control method according to claim 5, further comprising:
when the system is in a full-time AI state or in a single listening state, the television signal board is in a normal working state, the screen is not displayed, the fan control CPU module sets the FB _ ON signal to be a low level, the power supply conversion management module does not provide power supply, and the DMD digital light processing technical board does not work.
7. The laser television power supply control method according to claim 6, further comprising:
when the fan cannot be normal due to faults or the working state is abnormal, the fan control CPU module controls the MCU _ ON signal and the FB _ ON signal to be at low level, the power panel does not provide 50V power supply, and the DMD digital light processing technical panel does not work.
8. The laser television power supply control method according to claim 7, further comprising:
after the system starts to operate, judging whether the temperature control fan system works normally or not, if not, setting the MCU _ ON signal to be a low level, and returning an abnormal value to a television signal board; if the television signal board normally works, receiving the current working state of the television signal board, judging whether the television signal board currently enters a standby state, if so, setting the MCU _ ON signal to be a low level, and ending; if not, continuously detecting whether the system is in a full-time AI state, if so, setting the FB _ ON signal to be a low level and ending; if not, setting the FB _ ON signal to be high level and then ending;
after the system is powered ON and started, judging whether the system needs to enter a standby state, if so, setting the PWR _ ON signal and the MB _ ON signal to be low level and ending; and if not, setting the PWR _ ON signal to be at a high level, running a starting process, setting the MB _ ON signal to be at a high level, acquiring the current starting state, and sending the current state to the fan control MCU module to finish the operation.
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