CN1330281A - Automatic signal tracking system for wireless 3D glasses - Google Patents
Automatic signal tracking system for wireless 3D glasses Download PDFInfo
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- CN1330281A CN1330281A CN 00109691 CN00109691A CN1330281A CN 1330281 A CN1330281 A CN 1330281A CN 00109691 CN00109691 CN 00109691 CN 00109691 A CN00109691 A CN 00109691A CN 1330281 A CN1330281 A CN 1330281A
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Abstract
An automatic signal tracking system for wireless 3D glasses is disclosed, which features that the service life of battery for wireless 3D glasses can be elongated from 100 hr to more than 1000 hr by improving the precision and efficiency of recognizing signals.
Description
The present invention relates to a kind of wireless 3 dimension glasses automatic signal tracking systems.
See also Fig. 1, Fig. 1 is the structural representation of existing general infrared ray 3 dimension glasses signal receiving end electronic circuits, and wherein the wireless signal receiving circuit 100 of these infrared ray 3 dimension glasses includes an infrared signal receiver 101, a signal processing circuit 102, a liquid crystal shutter driving circuit 103, a booster circuit 104, a battery 105 and switch 106.Wherein the electric power of this infrared signal receiver 101, signal processing circuit 102, liquid crystal shutter driving circuit 103 and booster circuit 104 required uses is supplied by this battery 105.Generally speaking, the average use working current of this infrared signal receiver 101 is more than 1mA (milliampere), the average use working current of this signal processing circuit 102 is also about 1mA, and both average use working currents of this liquid crystal shutter driving circuit 103 and booster circuit 104 make whole average total working current that uses about 2.1mA about 0.1mA.Therefore, for the mercury battery that a traditional diameter is 20mm, the output power of this mercury battery generally is about 220mAH (Milliampere Hour), so when using traditional signal to receive electronic circuit, existing infrared ray 3 dimension glasses can only use about 100 hours continuously.
In the wireless signal receiving circuit 100 of above-mentioned existing infrared ray 3 dimension glasses, this wireless signal receiving circuit 100 can't reduce its average total reason of using working current, be this infrared signal receiver 101 receiving infrared-ray carrier wave step signal 107 constantly, and this signal processing circuit 102 is processing signals ceaselessly also, therefore for above-mentioned mercury battery, the limit of the continuous service time of the existing wireless signal receiving circuit 100 of this system can only reach 100 hours.
Therefore, the objective of the invention is to propose effective solution,, make the use of wireless 3 dimension glasses become convenient to increase continuous service time and to be increased to more than 1,000 hours at above-mentioned shortcoming.
Wireless 3 dimension glasses automatic signal tracking systems of the present invention, by the degree of accuracy of raising signal identification and the efficient of identification, make infrared signal receiver and signal processing circuit to work to all the period of time, need only utilize few time to get final product the automatic synchronous tracking wireless signal, and in the time of major part, infrared signal receiver and signal processing circuit all are in holding state, not only reduce the consumption of average total current, and average total current is reduced to below the 0.2mA, make to extend to more than 1,000 hours by existing 100 hours continuous service time, make the utilizations of 3 dimension glasses become convenient.
Automatically recognize the logical theory of tracking by using main signal, and cooperate signal to receive the improvement of electronic circuit, make that the present invention need only several cycles of detecting wireless synchronizing signal, get final product the employed power supply of shutdown signal receiver and make signal processing circuit enter holding state, reach the purpose of saving electric power by duty.
The above-mentioned simple explanation that is illustrated as wireless 3 dimension glasses usefulness automatic signal tracking systems of the present invention, for strengthening understanding and the understanding in the present invention's use, existing in conjunction with the accompanying drawings to the invention provides a complete explanation.
Fig. 1 is the structural representation of general infrared ray 3 dimension glasses signal receiving end electronic circuits;
Fig. 2 is the synoptic diagram of the employed synchronizing signal of general wireless 3 dimension glasses;
Fig. 3 is the logical schematic of the automatic recognition and tracking of signal of the present invention;
Fig. 4 is the structural approach synoptic diagram of a kind of wireless 3 dimension glasses of the present invention with automatic signal tracking system;
The invention provides a kind of wireless 3 dimension glasses automatic signal tracking systems, by using the logical theory of automatic recognition and tracking, and cooperate signal to receive the improvement of electronic circuit, make that wireless 3 automatic signal tracking systems used of dimension glasses of the present invention need only several cycles of detecting wireless synchronizing signal, get final product the employed power supply of shutdown signal receiver and make signal processing circuit enter holding state, therefore can reach the purpose of saving electric power by duty.Before the explanation embodiment of the invention, do an explanation at the logical theory of the automatic recognition and tracking of signal proposed by the invention earlier.
The automatic recognition and tracking logical theory of signal proposed by the invention can be divided into the explanation of three stages on the precedence of time, the phase one is automatically synchronous time zone.Also be that the automatic recognition and tracking of signal system proposed by the invention is according to this triphasic logical theory, be applied to the field of 3 dimension anaglyph spectacleses.Logical theory proposed by the invention below is described.
The definition of physical quantity:
Before explanation logical theory of the present invention, define some physical quantitys earlier, to make things convenient for the following description.Now see also Fig. 2, Fig. 2 is the synoptic diagram of the employed synchronizing signal of general wireless 3 dimension glasses.The employed wireless synchronization signal of general wireless 3 dimension liquid crystal shutter glasses is the square-wave signal that changes one-period, this square-wave signal is the received synchronizing signal S of signal receiver of wireless 3 dimension liquid crystal shutter glasses, signal processing circuit then according to this synchronizing signal S in order to open or to close the left and right liquid crystal shutters on the 3 dimension glasses, hypothesis is when synchronizing signal S is the state of " 0 " in the present invention, the expression display scans the left image of stereopsis in the time interval of " 0 ", signal processing circuit was opened left liquid crystal shutter and right liquid crystal shutter was closed this moment; In addition, when synchronizing signal was the state of S " 1 ", the expression display scan the right image of stereopsis in the time interval of " 1 ", this moment signal processing circuit with right liquid crystal shutter unlatching and with left liquid crystal shutter for closing.Below the present invention for convenience of description, some physical quantitys of definition earlier.
Week, step period Tw represented the synchronizing signal S time interval of one-period.
Synchronous semiperiod T
hExpression synchronizing signal S is the shape of " 0 " or " 1 "
Time interval semiperiod during attitude.
Synchronous semiperiod T
0Time when expression synchronizing signal S is " 0 " state
At interval.
Synchronous semiperiod T
1When expression synchronizing signal S is one state the time
Interbody spacer.
Positive polarity transition T
+Synchronizing signal S becomes " 1 " by " 0 " state-transition
State.
Negative polarity transition T
-Synchronizing signal S is transformed into " 0 " by one state
State.
The image scan time T
ScanAt synchronous semiperiod T
hIn, expression display electronics
The sweep time of rifle scanning stereopsis.
Tolerable error drift time T
DriftAt synchronous semiperiod T
hIn, expression display electronics
Rifle is to cover and time of flyback.
The essence spirit of the automatic recognition and tracking of signal that the present invention implemented is, utilizes existing microprocessor, implements signal identification, synchronous triggering and triphasic processing such as synchronous automatically according to the precedence of time.Be signal identification time zone in first time zone, the enabling signal receiver utilizes the time T of a synchronizing cycle simultaneously to receive synchronizing signal S
w, precision detects the time T of synchronizing signal semiperiod
hBe the synchronous triggering time zone in second time zone, the triggered time of accurate next synchronous semiperiod of detecting is with the automatically synchronous time zone in correct startup the 3rd time zone; And in the 3rd time zone automatically synchronously i.e. time zone, shutdown signal receiver then, and make microprocessor produce synchronizing signal with interrupt mode.Below narrate the principle of work in each time zone respectively.
Signal identification:
Shown in the automatic recognition and tracking logical schematic of the signal of Fig. 3, make that Ssync is that actual synchronizing signal, Strack is synchronizing signal, T from motion tracking
DBe signal identification time zone, T
TBe synchronous triggering time zone, T
ABe automatically synchronous time zone T
HmBe the time interval of semiperiod of measuring.In first time zone is signal identification time zone T
DIn, its most important work promptly is to utilize the feature of actual synchronizing signal Ssync, correctly identifies the correctness of signal in the shortest time, and utilizes microprocessor to measure the time T of this actual synchronizing signal Ssync semiperiod simultaneously
h, to be provided at the 3rd time zone T
aIn, microprocessor produced from the foundation of the synchronizing signal Strack of motion tracking.The present invention reduces three with the feature of this synchronizing signal Ssync of reality.
One of feature: the interval of adjacent two semiperiods of actual synchronizing signal Ssync must be consistent, and also promptly the actual synchronizing signal Ssync of expression is the time interval T of the state of " 0 " or " 1 "
0With T
1Must be consistent.
Two of feature: the positive polarity transition T of actual synchronizing signal Ssync
+, negative polarity transition T
-Must alternate.
Three of feature: the synchronous semiperiod T of actual synchronizing signal Ssync
0With T
1Must be in a certain finite interval, in order to remove the scintillation of liquid crystal shutter, the sweep frequency of stereoscopic picture plane must be increased between 100Hz and the 120Hz usually, can limit the frequency T of the semiperiod of this actual synchronizing signal Ssync thus
0With T
1Must be between 100Hz and 120Hz.
Utilize this feature of three, microprocessor can identify correct synchronizing signal, and detect T in the time in the adjacent two semiperiod time zones of the synchronizing signal Ssync of reality
1With T
0Get the time interval T of the semiperiod that its mean value can measure afterwards
Hm
Synchronous triggering
As shown in Figure 3, in second time zone be synchronous triggering time zone T
TIn, its most important work promptly is to detect the time point Tt that positive polarity transition or negative polarity transition take place, and according to this time point Tt to start the operation in the 3rd time zone.
Automatically synchronously
As shown in Figure 3, the promptly automatically synchronous together time zone T in the 3rd time zone
AIn, its most important work promptly is after the time point Tt of synchronous triggering, according to the time interval T of measured semiperiod
Hm, producing one by microprocessor automatically with interrupt mode can be from the synchronizing signal Strack of motion tracking.Because the measuring accuracy of microprocessor is limited, the time error that is caused that measurement synchronization triggers and measure the error of semiperiod can make the phenomenon Sdrift that drifts about from the time that produces between the synchronizing signal Strack of motion tracking and actual synchronization signal Ssync.The cited example of Fig. 3 of the present invention is to make the time T t of synchronous triggering for correct, and the time interval T of the semiperiod of measuring
HmBe slightly less than the time interval T of actual synchronization signal semiperiod
h, the time interval of its difference is a mouthful t, therefore can produce a phenomenon Sdrift who drifts about forward.Sequential with respect to actual synchronization signal Ssync, order is drifted about forward from motion tracking synchronizing signal Ssack, can obtain an added advantage, can utilize forward the favorable mistiming of drift to open or close liquid crystal shutter in advance, to offset the liquid crystal shutter unlatching or required reaction time when closing.But, when this time of drifting about has forward surpassed tolerable error drift time range Tdrift, then liquid crystal shutter time of opening or closing becomes too early, can cause the phenomenon of light leak, also be that automatic tracking system of the present invention must restart once more, heavily cover the work of carrying out first, second, reaching the 3rd time zone, to guarantee to cause the phenomenon of light leak.Below, theoretical explanation is the phenomenon of drift forward, and with the synchronous maximum time interval of the numeral explanation tolerable of reality.
The semiperiod of supposing the measured synchronizing signal of microprocessor is T
Hm, and the time actual synchronization signal semiperiod be T
h, and make T
h＞T
Hm, then can calculate following physical quantity.
The measuring error Δ t=T of synchronous semiperiod
h-T
Hm
Autosynchronous maximum half periodicity of tolerable N=Tdrift/ Δ t
The autosynchronous maximum time interval T=NxT of tolerable
h
When enumerating explanation with actual amount, for example, synchronous semiperiod T
h=10
-2Sec, and tolerable error drift time T drift=10
-4Sec, then the measuring accuracy at microprocessor respectively is
Δ t=10
-7Sec and 10
-8During sec, the value of N and T is distinctly as follows:
| Measuring error Δ t | ????10 -7sec | ????10 -6sec |
| Autosynchronous maximum half periodicity of tolerable N | ????1000 | ????100 |
| Tolerable interval T of autosynchronous maximum time | ????10sec | ????1sec |
As from the foregoing, if measuring error Δ t can reach 10
-8During sec, tolerable autosynchronous maximum time is spaced apart 1 second, promptly can also allow the switching time of liquid crystal shutter and written sweep time synchronous in 1 second; And reach 10 at measuring error Δ t
-7During sec, tolerable autosynchronous maximum time is spaced apart 10 seconds, promptly can also allow the switching time of liquid crystal shutter and picture synchronous sweep time in 10 seconds.
At present, its employed vibration frequency of microprocessor (micro-processor) of generally being sold on the market to be can reaching 1MHz to 10MHz, that is the I of its time degree of accuracy reaches 10
-5Sec to 10
-7Between second, can be used as signal of the present invention and know the central processing unit of tracker automatically, cooperating the automatic recognition and tracking logic of signal of the present invention is the design of the software and the electronic circuit of design basis, can make extend to more than 1000 hours by present 100 hours the service time of wireless 3 dimension glasses, its reason is for being described as follows.According to aforementioned, use the existing wireless 3 dimension glasses of infrared mode, because its designed infrared radiation receiving circuit must use all time, ceaselessly make infrared signal receiver and signal circuit work.In the consumption of electric current, the average use working current of this infrared signal receiver is about 1mA (milliampere), and the average use working current of this signal processing circuit is also about 1mA.Therefore, for the mercury battery that diameter of tradition is 20mm, the output power of this mercury battery generally is about 220mAH (Milliampere Hour), and the wireless glasses of existing infrared ray 3 dimensions can only use about 100 hours continuously.Yet, according to theory of the present invention and the actual control circuit that uses, using vibration frequency to be 1HMz, also be that the I of its time degree of accuracy reaches 10
-6Second microprocessor the time, and at synchronous signal frequency is 50Hz (as if then being 100Hz in the semiperiod), when its tolerable autosynchronous maximum time is spaced apart 1 second, promptly need only time with 3 semiperiods, can reach signal identification, synchronous triggering reaches effects such as synchronous automatically, in making between after 3 semiperiods 1 second, though close infrared signal receiver and signal processing circuit (illustrating among its actual electrical action embodiment), can also allow the switching time and the written scan-synchronized of liquid crystal shutter, thereby make the average consumed cur-rent of this infrared signal receiver and signal processing circuit, by the 2mA rapid drawdown is 3 percent, therefore for the mercury battery that output power is 220mAH (Milliampere Hour), its continuously service time by being increased to 3000 hours (theoretical value) in 100 hours.Below, see through embodiment the wireless glasses automatic signal tracking system of a kind of 3 dimensions of the present invention is described.
Embodiment
Now see also Fig. 4, Fig. 4 is system's block schematic diagram of the embodiment of the invention.The embodiment of the invention 1 is made up of a wireless signal acceptance division 200.Wherein wireless signal acceptance division 200 includes a wireless signal receiving circuit 201, a microprocessor 202, a liquid crystal shutter driving circuit 203, a battery 204, two-way control electronic switch 205,206, a booster circuit 207 and and restarts switch 208.The function of this wireless signal receiving circuit 201 is to receive a left and right sides synchronous carrier signal 210, and will reduce and export a left and right sides synchronizing signal 211 after this carrier signal removal.The function of this microprocessor 202, be to receive a left and right sides synchronizing signal 211, utilize three times semiperiod of left and right sides synchronizing signal 211, with the processing of enforcement signal identification and the processing of synchronous triggering, enter autosynchronous processing afterwards, make that this microprocessor 202 can open and close electronic switch 205 after three semiperiods, make wireless signal receiving circuit 201 enter the attonity state, this microprocessor 202 is according to the time interval of measured measurement semiperiod simultaneously, automatically produce and export a left liquid crystal shutter drive signal 212 and a right liquid crystal shutter drive signal 213 with interrupt mode every the semiperiod, in order to an automatic driven in synchronism left side, right liquid crystal shutter.Generally, microprocessor only just need consume electric power when interrupting executive routine when the interrupt mode operation, then be in the state of standby in the other times, and its consumed current has only several milliamperes (μ A) usually.In addition, this microprocessor 202 must be in " tolerable autosynchronous maximum time at interval ", implements signal identification, synchronous triggering and triphasic processing such as synchronous automatically again.This liquid crystal shutter drives loop 203 and receives a left liquid crystal shutter drive signal 212 and a right liquid crystal shutter drive signal 213, and the voltage that is provided according to booster circuit 207, after the voltage raising with this left side liquid crystal shutter drive signal 212 and right liquid crystal shutter drive signal 213, the right liquid crystal shutter drive signal 215 after the left liquid crystal shutter drive signal 214 and after output one is boosted is boosted.Another function of this microprocessor 202, in setting " time range that temporarily stops left and right sides liquid crystal shutter action ", if the processing of this signal identification, in the time of can't identifying correct synchronizing signal, then making microprocessor export a voltage is zero left liquid crystal shutter drive signal and to export a voltage be a right liquid crystal shutter drive signal of zero, to stop the action of left and right sides liquid crystal shutter.Another function of this microprocessor 202, in setting " time range of closing hardware system automatically ", if the processing of this signal identification, can't door when identifying correct synchronizing signal, then make microprocessor close electronic switch 205, receive back 201 employed power supplys to close this wireless signal, also close electronic switch 206 with seasonal microprocessor, drive loop 203 employed power supplys to close this booster circuit 207 and liquid crystal shutter, make microprocessor enter holding state at last, to reach the purpose of automatic powered-down.This microprocessor 202 has only several milliamperes (μ A), loss current hardly in the state time institute consumed current of standby.Starting once again of this microprocessor 202 is that action 209 (Reset) that restart by an outside restart switch 208 with unlatching, to reset the correct operation of these wireless signal acceptance division 200 each circuit, make this microprocessor 202 enter the state of normal operation by holding state, and make this microprocessor 202 unlocking electronic switches 205, for should wireless signal receiving circuit 201 employed power supplys, with seasonal microprocessor 202 also unlocking electronic switch 206, for should booster circuit 207 and liquid crystal shutter driving circuit 203 employed power supplys, and make this microprocessor 202 begin to repeat the automatic recognition and tracking software systems of signal.
Protection scope of the present invention is determined by claims, any those skilled in the art, and in the scope of spirit of the present invention and content, improvement of being done and replacement should be regarded as belonging to protection scope of the present invention.
Claims (11)
1, a kind of wireless 3 dimension glasses automatic signal tracking systems include a wireless signal and receive hardware system and the automatic recognition and tracking software systems of a signal, and wherein this wireless signal reception hardware system includes:
One wireless signal receiving circuit receives a left and right sides synchronous carrier signal, and will reduce and export a left and right sides synchronizing signal after this carrier signal removal;
One microprocessor, receive a left and right sides synchronizing signal and a setting of restarting switch, sequential according to this left and right sides synchronizing signal, to repeat automatic recognition and tracking software systems, and export a wireless signal receiving key signal, a boost circuit switch signal, a left liquid crystal shutter drive signal and a right liquid crystal shutter drive signal, this microprocessor restarts the setting of switch according to this in addition, receives hardware system to start this wireless signal;
One liquid crystal shutter driving circuit receives a left liquid crystal shutter drive signal and a right liquid crystal shutter drive signal, and the right liquid crystal shutter drive signal of the fast gate drive signal of left-handed crystal and after its back output one of boosting boosted after boosting;
One battery provides this wireless signal to receive the power supply of hardware system;
One wireless signal receiver electronic switch receives a wireless signal receiving key signal, and exports or close the employed power supply of this wireless signal receiving circuit according to this signal;
One booster circuit electronic switch receives a boost circuit switch signal, and exports or close this booster circuit and the employed power supply of liquid crystal shutter driving circuit according to this signal;
One booster circuit carries out suitable boosting with the voltage that this battery provided;
One restarts switch, restarts wireless 3 dimension glasses automatic signal tracking systems.
2, wireless 3 dimension glasses automatic signal tracking systems as claimed in claim 1, it is characterized in that, this left and right sides synchronous carrier signal that this wireless signal receiving circuit received can be the carrier signal of vertical scan synchronization signal, or removes carrier signal after half for the vertical scan synchronization signal frequency.
3, wireless 3 dimension glasses automatic signal tracking systems as claimed in claim 1, it is characterized in that the automatic recognition and tracking software systems of this signal repeat processing, a processing and an autosynchronous processing that triggers synchronously of signal identification in regular turn according to time order and function.
4, the automatic recognition and tracking software systems of signal as claimed in claim 3, it is characterized in that, the processing of this signal identification, it is the time interval of in a synchronous signal period, measuring adjacent two semiperiods, the error in this two time interval, if during less than a certain default numerical value, the synchronizing signal of then measuring gained is correct signal, and the time interval by two semiperiods of measuring gained is obtained a mean value, and to make it be the time interval of measuring the semiperiod, if this time interval of measuring the semiperiod, the synchronizing signal of then measuring gained was correct signal in a certain finite interval scope the time; The processing of this signal identification also is in a synchronous signal period, if during the continuous alternate of its signal polarity transition positive polarity transition, negative polarity transition and positive polarity transition, the synchronizing signal of then measuring gained is correct signal; The processing of this signal identification also is in a synchronous signal period, if during the continuous alternate of its signal polarity transition negative polarity transition, positive polarity transition and negative polarity state, the synchronizing signal of then measuring gained is correct signal.
5, the automatic recognition and tracking software systems of signal as claimed in claim 4 is characterized in that, in the processing of described signal identification, this measures the time interval of semiperiod, must force to make it be slightly less than the interval of actual synchronization signal semiperiod.
6, the automatic recognition and tracking software systems of signal as claimed in claim 3 is characterized in that, the processing of this synchronous triggering after signal identification is handled, detects the time of origin of next signal polarity transition.
7, the automatic recognition and tracking software systems of signal as claimed in claim 3, it is characterized in that, this autosynchronous processing, after synchronous triggering is handled, make microprocessor export a wireless signal and receive the signal close to the wireless signal receiver electronic switch, to close the power supply of this wireless signal receiving circuit, enter the state of standby with seasonal microprocessor, but, produce and export a left liquid crystal shutter drive signal and a right liquid crystal shutter drive signal automatically with interrupt mode every this time interval of measuring the semiperiod.
8, the automatic recognition and tracking software systems of signal as claimed in claim 3, it is characterized in that, the automatic recognition and tracking software systems of this signal are set with the tolerable scope of autosynchronous maximum time, make processing, the processing of synchronous triggering and the interval that repeats of autosynchronous processing of this signal identification, must be less than this tolerable scope of autosynchronous maximum time, and before repeating, make microprocessor export a wireless signal and receive the signal of unlatching to the wireless signal receiver electronic switch, to export the employed power supply of this wireless signal receiving circuit.
9, the automatic recognition and tracking software systems of signal as claimed in claim 3, it is characterized in that, the automatic recognition and tracking software systems of this signal are set with one and temporarily stop the time range that left and right sides liquid crystal shutter moves, if the i.e. processing of this signal identification in this time range, in the time of can't identifying correct synchronizing signal, making microprocessor export a voltage is zero left liquid crystal shutter drive signal and to export a voltage be a right liquid crystal shutter drive signal of zero, to stop the action of left and right sides liquid crystal shutter.
10, in the automatic recognition and tracking software systems of signal as claimed in claim 3, the automatic recognition and tracking software systems of this signal are set with a time range of closing hardware system automatically, if the processing of order this signal identification in this time range, in the time of can't identifying correct synchronizing signal, make microprocessor export a wireless signal and receive the signal close to this wireless signal receiver electronic switch, to close the employed power supply of this wireless signal receiving circuit, also export signal that a booster circuit cuts out to this booster circuit electronic switch with seasonal little processing, to close this booster circuit and the employed power supply of liquid crystal shutter driving circuit, make processor enter holding state at last.
11, wireless 3 dimension eyes automatic signal tracking systems as claimed in claim 1, it is characterized in that, this restarts switch is a switch, can restart this microprocessor by an action of restarting, make this microprocessor enter the state of running by holding state, and make this microprocessor export the signal of wireless signal reception unlatching to this wireless signal receiver electronic switch, to export the employed power supply of this wireless signal receiving circuit, also export the signal of booster circuit unlatching to this booster circuit electronic switch with seasonal microprocessor, exporting this booster circuit and the employed power supply of liquid crystal shutter driving circuit, and make this microprocessor begin to repeat the automatic recognition and tracking software systems of signal.
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| CN 00109691 CN1330281A (en) | 2000-06-21 | 2000-06-21 | Automatic signal tracking system for wireless 3D glasses |
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| CN 00109691 CN1330281A (en) | 2000-06-21 | 2000-06-21 | Automatic signal tracking system for wireless 3D glasses |
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