CN101489071B - System for preventing optical projection television from abnormal shutdown and implementing method thereof - Google Patents
System for preventing optical projection television from abnormal shutdown and implementing method thereof Download PDFInfo
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- CN101489071B CN101489071B CN2008100659070A CN200810065907A CN101489071B CN 101489071 B CN101489071 B CN 101489071B CN 2008100659070 A CN2008100659070 A CN 2008100659070A CN 200810065907 A CN200810065907 A CN 200810065907A CN 101489071 B CN101489071 B CN 101489071B
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Abstract
A optical projection television abnormal shutdown protection system and an implementing method thereof comprises: a main control circuit, an Ultra-High Pressure (UHP) light source circuit, a fan control circuit, a power-down protection circuit, a system power switch monitoring circuit and a system power circuit. The UHP light source control circuit, the fan control circuit, the power-down protection circuit and the system power switch monitoring circuit are respectively electrically connected to the main control circuit, and the power-down protection circuit and the system power switch monitoring circuit are respectively electrically connected with the system power circuit. During the normal work, the system power circuit provides power for the UHP light source circuit and the fan control circuit through the main control circuit. When the system power switch monitoring circuit monitors the power-down of the system circuit, sends alarming signals to the main control circuit. The main control circuit receives the alarming signals and sends control signals to start the power-down protection circuit which enables the system power circuit to renewedly get electricity. The main control circuit shuts down the system according to the normal time sequence, effectively protects the system and light source and prolongs the television set service life.
Description
Technical field
The present invention relates to the preventing optical projection television technical field, relate in particular to a kind of preventing optical projection television and close method for protecting unusually.
Background technology
When traditional CRT display device cuts out, only need a direct powered-down switch to get final product, but be essentially different on preventing optical projection television and the traditional CRT TV displaying principle.In the optical projection Digital Television, owing to adopted powerful very-high performance (Ultra High Performance, UHP) light source, after the UHP light source was closed, still having surplus heat to make the internal system temperature rise, and preventing optical projection television is as a kind of high-resolution digital display equipment, its core component is to responsive to temperature, when its work or storage temperature exceed its limit, not only influence its performance, and can influence its working life.Therefore, the preventing optical projection television system adopts the heat radiation delayed mode usually when normal shutdown, treat to cut off system power supply again after the heat radiation fully.Yet, as if user's false touch system power supply or because of improper use causes system's abnormal shutdown, all can make system's emergency power off under the situation that is not having heat radiation, cause the internal system temperature to rise, thereby influence lifetime of system.
Summary of the invention
Therefore, the object of the present invention is to provide a kind of preventing optical projection television protection system of shutting down unusually, it is simple in structure, and it is convenient to realize, cost is low, and is easy to utilize.
Another object of the present invention is to provide a kind of preventing optical projection television to close method for protecting unusually, it can effectively prevent unusual shutdown and cause the rising of system temperature, effectively protect system and light source.
According to above-mentioned purpose of the present invention, the invention provides a kind of preventing optical projection television protection system of shutting down unusually, it comprises: main control circuit, the UHP control circuit for light source, fan control circuitry, the power down protection circuit, system power supply switch observation circuit and system power supply circuit, the UHP control circuit for light source, fan control circuitry, power down protection circuit and system power supply switch observation circuit electrically connect with main control circuit respectively, power down protection Circuits and Systems mains switch observation circuit electrically connects with the system power supply circuit respectively, during operate as normal, the system power supply circuit provides power supply for UHP control circuit for light source and fan control circuitry by main control circuit; When system power supply switch monitoring circuit monitors after the power down of system power supply circuit; the alert signal of transmitting messages is given main control circuit; main control circuit is sent out control signal startup power down protection circuit after receiving alarm signal; the power down protection circuit make the system power supply circuit again electric, main control circuit is by normal sequential shutdown system.
According to above-mentioned purpose of the present invention, the invention provides a kind of preventing optical projection television and close method for protecting unusually, comprise the steps:
Step 1: the state of system power supply switch monitoring circuit monitors system power supply switch, and according to monitoring result execution corresponding steps,
If the system power supply switch closure then continues execution in step 1;
If the system power supply switch disconnects, then execution in step 2;
Step 2: system power supply switch observation circuit is transmitted messages alert signal to main control circuit;
Step 3: main control circuit is sent out control signal and is started the power down protection circuit;
Step 4: main control circuit is by normal sequential start or shutdown.
The invention has the beneficial effects as follows: this preventing optical projection television protection system of shutting down unusually is simple in structure, and it is convenient to realize, cost is low; This preventing optical projection television closes method for protecting unusually not only can make system shut down according to normal shutdown sequential under unusual shutdown situation; effective protection system and light source; prolong the useful life of television set; can also be when user's false touch system power supply causes system's accident power-off; response re-powers operate as normal fast, has reduced the idling consumption time.
Description of drawings
Below in conjunction with accompanying drawing,, will make technical scheme of the present invention and other beneficial effects apparent by the specific embodiment of the present invention is described in detail.
In the accompanying drawing,
Fig. 1 is for realizing shut down the unusually theory diagram of protection system of preventing optical projection television of the present invention;
Fig. 2 is shut down the unusually circuit structure diagram of partial circuit of protection system of preventing optical projection television of the present invention;
Fig. 3 closes the flow chart of method for protecting unusually for preventing optical projection television of the present invention.
Embodiment
Fig. 1 is for realizing shut down the unusually theory diagram of protection system of preventing optical projection television of the present invention; as shown in the figure; this system comprises main control circuit 10; UHP control circuit for light source 20; fan control circuitry 30; power down protection circuit 40; system power supply switch observation circuit 50 and system power supply circuit 60; UHP control circuit for light source 20; fan control circuitry 30; power down protection circuit 40 and system power supply switch observation circuit 50 electrically connect with main control circuit 10 respectively; and controlled by main control circuit 10; power down protection circuit 40 electrically connects with system power supply circuit 60 respectively with system power supply switch observation circuit 50; UHP control circuit for light source 20 electrically connects the UHP light source, and fan control circuitry 30 electrically connects fan.During operate as normal; system power supply circuit 60 provides power supply for UHP control circuit for light source 20 and fan control circuitry 30 by main control circuit 10; after system power supply switch observation circuit 50 monitors 60 power down of system power supply circuit; the alert signal of transmitting messages is given main control circuit 10; main control circuit 10 is sent out control signal startup power down protection circuit 40 after receiving alarm signal; power down protection circuit 40 make system power supply circuit 60 again electric, main control circuit 10 is by normal sequential shutdown system.
As the present invention one embodiment more specifically, system power supply switch observation circuit 50 is the travel switch circuit with system power supply circuit 60 synchronization actions.As shown in Figure 2, system power supply circuit 60 comprises a system power supply switch 601, when system power supply switch 601 closes, system power supply circuit 60.System power supply switch observation circuit 50 comprises near the travel switch of being located at the system power supply switch 601 501, travel switch 501 is connected by easy linkage (not shown) with system power supply switch 601, when system power supply switch 601 closures, linkage can touch travel switch 501, makes travel switch 501 also closed; Equally, when system power supply switch 601 disconnected, linkage can touch travel switch 501, and travel switch 501 is also disconnected.Travel switch 501 1 end ground connection, the other end electrically connects main control circuit 10, and when system power supply switch 601 closures, travel switch 501 respective closed will output to the monitor signal of main control circuit 10 by high level step-down level; When system power supply switch 601 disconnected, travel switch 501 corresponding disconnections uprised level with the monitoring of level of signal that outputs to main control circuit 10 by low level.Main control circuit 10 is received after the monitor signal of mains switch observation circuit 50 uprises level by low level and is sent out control signal startup power down protection circuit 40; power down protection circuit 40 comprises a relay switch 401 and the control relay circuit 402 that electrically connects with relay switch 401; control relay circuit 402 electrically connects with main control circuit 10; when control relay circuit 402 is received the control signal that main control circuit 10 sends; relay switch 401 closures; make system in working order down; after system power supply switch 601 is disconnected suddenly; can power on by relay switch 401, guarantee system's operate as normal.Relay switch 401 has first, second normally opened contact 402,403 and coil control end 404, the first input end 602 of these first normally opened contact, 402 1 ends and system power supply switch 601 electrically connects, the other end and first output, 603 electric connections that mutually should first input end 602; Second input 604 of these second normally opened contact, 403 1 ends and system power supply switch 601 electrically connects, the other end and second output, 605 electric connections that mutually should first input end 604; This control relay circuit 402 comprises two amplifying triodes of serial connection successively, the base stage of the first amplifying triode Q101 connects main control circuit 10 by resistance R 101, grounded emitter, collector electrode divides two-way, the resistance R 102 of leading up to connects the 12V power supply, and another road connects the second amplifying triode Q102 base stage by resistance R 103.The second amplifying triode Q102 base stage is passed through resistance R 104 ground connection, the direct ground connection of emitter, and collector electrode electrically connects by the end of resistance R 105 with coil control end 404, and coil control end 404 other ends and 12V DC power supply electrically connect.When main control circuit 10 was given 402 1 high level signals of control relay circuit, relay switch 401 coils got electric, first, second normally opened contact 402,403 adhesives, and system power supply is closed by relay switch 401.
Fig. 3 is the flow chart that preventing optical projection television of the present invention closes method for protecting unusually, comprises the steps:
Step 1: the state of system power supply switch observation circuit 50 monitoring system mains switches 601, and according to monitoring result execution corresponding steps,
If the system power supply switch closure then continues execution in step 1;
If the system power supply switch disconnects, then execution in step 2;
Step 2: system power supply switch observation circuit 50 is transmitted messages alert signal to main control circuit 10;
Step 3: 10 control signals of main control circuit start power down protection circuit 40 re-powers system;
Step 3.1: main control circuit 10 decision-making systems are accident power-off or abnormal shutdown,
If accident power-off, then execution in step 4.1 and step 4.2;
If abnormal shutdown, then execution in step 4.3 and step 4.4;
Step 4.1: main control circuit 10 starts fan control circuitry 30 to open fan;
Step 4.2: main control circuit 10 starts UHP control circuit for light source 20 to open the UHP light source;
Step 4.3: main control circuit 10 starts fan, closes the UHP light source;
Step 4.4: main control circuit 10 is treated to close fan after system radiating fully.
System power supply switch observation circuit 50 is by the state of travel switch 501 monitoring system mains switches 601 in the described step 1, when system power supply switch 601 disconnects, travel switch 501 corresponding disconnections uprise level with the monitoring of level of signal that outputs to main control circuit 10 by low level.
Alarm signal in the described step 2 is a level signal that is uprised level by low level.
Control signal in the described step 3 is a high level signal, after power down protection circuit 40 is received this high level signal, and relay switch 401 adhesives, system power supply circuit 60 re-powers.
In the described step 3.1, whether closure is come decision-making system to main control circuit 10 is accident power-off or abnormal shutdown by decision-making system mains switch 601, if system's accident power-off that system power supply switch 601 causes for the user touches because of carelessness, the user can close system power supply switch 601 once more, if and system power supply switch 601 is pressed the system's abnormal shutdown that causes for the user because of shutdown, user's system power supply switch 601 that can not close once more, therefore, if this moment system power supply switch 601 closures then system is an accident power-off, system is an abnormal shutdown if system power supply switch 601 still disconnects.
In the described step 3.1, if system is accident power-off then main control circuit 10 execution in step 4.1～step 4.2, be that main control circuit 10 is started shooting by normal sequential, the system that guaranteed can respond and re-power operate as normal fast after accident outage, needing to have avoided etc. to be shut down after open system and cause the stand-by time loss again.What deserves to be mentioned is that after system re-powered operate as normal, main control circuit 10 was with relay switch 401, to prolong the useful life of power down protection circuit 40.
In the described step 3.1, if system is abnormal shutdown then main control circuit 10 execution in step 4.3～step 4.4, promptly main control circuit 10 is by normal sequential shutdown.In the step 4.4; main control circuit 10 can reduce system temperature by setting the heat radiation time-delay, after the system that treats dispels the heat fully, disconnects power down protection circuit 40 again; shutdown system, avoiding system to cause the internal system temperature to rise there not being emergency power off under the situation of dispelling the heat influences lifetime of system.
The above; for the person of ordinary skill of the art; can make other various corresponding changes and distortion according to technical scheme of the present invention and technical conceive, and all these changes and distortion all should belong to the protection range of accompanying Claim of the present invention.
Claims (7)
1. preventing optical projection television protection system of shutting down unusually, it is characterized in that, comprise: main control circuit, the very-high performance control circuit for light source, fan control circuitry, the power down protection circuit, system power supply switch observation circuit and system power supply circuit, the very-high performance control circuit for light source, fan control circuitry, power down protection circuit and system power supply switch observation circuit electrically connect with main control circuit respectively, power down protection Circuits and Systems mains switch observation circuit electrically connects with the system power supply circuit respectively, described power down protection circuit comprises a relay switch and the control relay circuit that electrically connects with relay switch, control relay circuit and main control circuit electrically connect, the system power supply circuit comprises a system power supply switch, system power supply switch observation circuit comprises the one stroke switch, and the trip switch is located near this system power supply switch and with the system power supply switch and is connected by linkage; During operate as normal, the system power supply circuit provides power supply for very-high performance control circuit for light source and fan control circuitry by main control circuit; When system power supply switch monitoring circuit monitors after the power down of system power supply circuit; the alert signal of transmitting messages is given main control circuit; main control circuit is sent out control signal startup power down protection circuit after receiving alarm signal; the power down protection circuit make the system power supply circuit again electric, main control circuit is by normal sequential shutdown system.
2. the preventing optical projection television as claimed in claim 1 protection system of shutting down unusually is characterized in that, described travel switch one end ground connection, and the other end electrically connects main control circuit.
3. the preventing optical projection television as claimed in claim 1 protection system of shutting down unusually, it is characterized in that, relay switch has first, second normally opened contact, reaches the coil control end, the first input end of this first normally opened contact, one end and system power supply switch electrically connects, the other end and first output electric connection that mutually should first input end; Second input of this second normally opened contact, one end and system power supply switch electrically connects, the other end electrically connects with second output that mutually should first input end, coil control end one end and DC power supply electrically connect, and the other end and control relay circuit electrically connect.
4. a preventing optical projection television closes method for protecting unusually, it is characterized in that, comprises the steps:
Step 1: the state of system power supply switch monitoring circuit monitors system power supply switch, and according to monitoring result execution corresponding steps, wherein said system power supply switch observation circuit comprises the one stroke switch, the trip switch is located near this system power supply switch and with the system power supply switch and is connected by linkage
If the system power supply switch closure then continues execution in step 1;
If the system power supply switch disconnects, then execution in step 2;
Step 2: system power supply switch observation circuit is transmitted messages alert signal to main control circuit;
Step 3: main control circuit is sent out control signal and is started the power down protection circuit, and wherein the power down protection circuit comprises a relay switch and the control relay circuit that electrically connects with relay switch, and control relay circuit and main control circuit electrically connect;
Step 4: main control circuit is by normal sequential start or shutdown;
Also comprise step 3.1 before the step 4 after the described step 3: the main control circuit decision-making system is accident power-off or abnormal shutdown, if accident power-off then in the step 4 main control circuit by normal sequential start, if abnormal shutdown then in the step 4 main control circuit by normal sequential shutdown.
5. preventing optical projection television as claimed in claim 4 closes method for protecting unusually; it is characterized in that; in the described step 3.1; whether closure is come decision-making system to main control circuit is accident power-off or abnormal shutdown by the decision-making system mains switch; if system power supply switch closure then system is an accident power-off, system is an abnormal shutdown if the system power supply switch disconnects.
6. preventing optical projection television as claimed in claim 4 closes method for protecting unusually, it is characterized in that, described normal sequential start step comprises: step 4.1: open fan; And step 4.2: open the very-high performance light source.
7. preventing optical projection television as claimed in claim 4 closes method for protecting unusually, it is characterized in that, described normal shutdown sequential step comprises: step 4.3: open fan, close the very-high performance light source; And step 4.4: treat to close fan after system radiating fully.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100659070A CN101489071B (en) | 2008-01-15 | 2008-01-15 | System for preventing optical projection television from abnormal shutdown and implementing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100659070A CN101489071B (en) | 2008-01-15 | 2008-01-15 | System for preventing optical projection television from abnormal shutdown and implementing method thereof |
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| Publication Number | Publication Date |
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| CN101489071A CN101489071A (en) | 2009-07-22 |
| CN101489071B true CN101489071B (en) | 2010-09-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2008100659070A Active CN101489071B (en) | 2008-01-15 | 2008-01-15 | System for preventing optical projection television from abnormal shutdown and implementing method thereof |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106291438B (en) * | 2015-06-09 | 2019-06-07 | 深圳市祈飞科技有限公司 | Abnormal shutdown processing method and processing device and electric energy measuring equipment equipped therewith |
| CN109510959B (en) * | 2018-10-29 | 2021-06-01 | 深圳康佳电子科技有限公司 | Control method and control system for preventing laser television from overheating |
| CN110049264B (en) * | 2019-03-28 | 2021-06-11 | 深圳创维－Rgb电子有限公司 | Laser television power supply control system and method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2708343Y (en) * | 2004-06-01 | 2005-07-06 | 王海强 | Power supply protection time-delay control device for projection system |
| CN101001339A (en) * | 2006-01-11 | 2007-07-18 | 中华映管股份有限公司 | Control method of on-off and waiting of projection TV set |
| CN101035230A (en) * | 2006-03-07 | 2007-09-12 | 上海信诚至典网络技术有限公司 | Back projection TV with the cut-off protection |
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2008
- 2008-01-15 CN CN2008100659070A patent/CN101489071B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2708343Y (en) * | 2004-06-01 | 2005-07-06 | 王海强 | Power supply protection time-delay control device for projection system |
| CN101001339A (en) * | 2006-01-11 | 2007-07-18 | 中华映管股份有限公司 | Control method of on-off and waiting of projection TV set |
| CN101035230A (en) * | 2006-03-07 | 2007-09-12 | 上海信诚至典网络技术有限公司 | Back projection TV with the cut-off protection |
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| CN101489071A (en) | 2009-07-22 |
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