CN102681668A - Low Power Wireless Keyboard - Google Patents
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- CN102681668A CN102681668A CN2012100303804A CN201210030380A CN102681668A CN 102681668 A CN102681668 A CN 102681668A CN 2012100303804 A CN2012100303804 A CN 2012100303804A CN 201210030380 A CN201210030380 A CN 201210030380A CN 102681668 A CN102681668 A CN 102681668A
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Abstract
The invention provides a wireless keyboard, which comprises a plurality of keys, a transmitter, an antenna and a controller. The plurality of keys includes a set of keys of a first type and a set of keys of a second type. Each of the plurality of first type keys is associated with one of a plurality of predetermined functions. The controller is configured to receive a first signal from the plurality of keys, the first signal indicating that at least one of the plurality of keys has been selected; determining whether a selected at least one of said plurality of keys is one of said first type of keys; and if the selected at least one of the plurality of keys is one of the first type of keys, activating the transmitter to transmit a second signal via the antenna, wherein the second signal carries information of one of the plurality of predetermined functions associated with the selected at least one of the plurality of keys.
Description
Technical field
Summary of the present invention is about wireless transmission, and more specific is about a kind of low-power wireless keyboard.
Background technology
In several years, the wireless short-range transmission system more has been usually used in the device such as telepilot or Wireless Keyboard in the past.For example; Telepilot or Wireless Keyboard comprise one group of key, a key matrix, a controller, a forwarder and usually and are used to transmit infrared ray (Infrared; " IR ") light emitting diode (the Light emitting diode of signal; " LED "), or one be used to transmit radio frequency (Radio frequency, " RF ") signal antenna.For example, Fig. 1 is the calcspar of traditional existing Wireless Keyboard 10.Please with reference to Fig. 1, Wireless Keyboard 10 can comprise one group of key (not shown), a key matrix 11 and a wireless short-range transmission system.Said wireless short-range transmission system comprises a controller 12, a quartz (controlled) oscillator 13, a forwarder 14 (TX), an and antenna 15.Said controller 12 is coupled in said key matrix 11, said quartz (controlled) oscillator 13 and said forwarder 14.Quartz (controlled) oscillator 13 more is coupled to said forwarder 14, and said forwarder 14 more is coupled to said antenna 15.Controller 12 can comprise that one is used to produce a modulator 12-1 of modulating signal.In operation, said controller 12 can send a signal to key matrix 11 or receive the signal from said key matrix 11.For example, controller 12 is configured to scan for key matrix 11, and then therefrom finds out the signal of representative " one or more key is pressed ", and transmits an enabling signal ACT1 and a modulating signal MOD respectively to quartz (controlled) oscillator 13 and forwarder 14.In response in enabling signal ACT1, quartz (controlled) oscillator 13 can produce one have required frequency reference signal REF, and reference signal REF is recycled to forwarder 14.Forwarder 14 can comprise a phase-lock loop frequency synthesizer (Phase-lock loop, " PLL " frequency synthes izer) 14-1 and a power amplifier (Power amplifier, " PA ") 14-2.Forwarder 14 can and be received from the modulating signal MOD of controller 12 and signal after producing a modulation based on the reference signal REF that is received from quartz (controlled) oscillator 13, another enabling signal ACT2.Signal behind the said modulation then converts a RF signal into and sends out via antenna 15.
Fig. 2 is a sequential chart; Said sequential chart explained at explanation controller 12 after key matrix 11 receives the signal of a representative " key is pressed ", the signal that is produced by quartz (controlled) oscillator 13, phase-lock loop 14-1, power amplifier 14-2 and forwarder 14.At first, controller 12 can start quartz (controlled) oscillator 13 has needed frequency with generation reference signal REF.In case quartz (controlled) oscillator 13 is stable, controller 12 can start phase-lock loop frequency synthesizer 14-1 and power amplifier 14-2.For example, phase-lock loop frequency synthesizer 14-1 can be earlier started by an enabling signal ACT2, and the frequency that is had based on reference signal REF is to produce a carrier signal.In case phase-lock loop frequency synthesizer 14-1 is stable; Reception can be through a modulating signal MOD who comes self-controller 12 " unlatching " or " closing " from the power amplifier 14-2 of the said carrier signal of phase-lock loop frequency synthesizer 14-1; And produce the signal behind the modulation thus, and convert a RF signal to and transmit via antenna 15.
Yet the conventional keyboard with the wireless short-range transmission system that is similar to above-mentioned operation form may consume a large amount of power.For example; Suppose that information is with (the Kilobit per second of per second 1 kilobit unit; " kbps ") transmit, and logic high identical with the bit time of logic low level (being that the work period is 50%), and the voltage of logic high and logic low level is respectively 2 volts (V) and 0V; In addition, the electric current of driving quartz (controlled) oscillator 13, phase-lock loop frequency synthesizer 14-1 and power amplifier 14-2 is respectively 50 micromicroamperes (μ A), 5 milliamperes (mA) and 5 milliamperes.In addition; Transmit for wireless short-range; Under hypothesis with very low bit error rate (bit error rate), and, compared to the time span of said order; Under the relatively short situation of time span between phase-lock loop frequency synthesizer lockup period, between phase-lock loop frequency synthesizer lockup period in institute's consumed current can be left in the basket.Therefore, the average current that is used to transmit a logic high bit (1) and a logic low bit (0) will be roughly 8000 μ A (i.e. (500 μ A+5mA+5mA) x 0.5+ (500 μ A+5mA) x 0.5).Therefore, said energy efficiency will be roughly how joule (Nanojoule per bit, " nJ/bit ") (i.e. 8000 μ A x 2V/1kbps) of every bit 16000.Past has proposed the improvement mode of many energy savings, and it has more the phase-lock loop frequency synthesizer (for example, low-power phase-lock loop frequency synthesizer) of energy efficiency with generation through design different phase locked loop frequency synthesizer.Yet, during the whole period that the signal that is transmitted is just being produced via forwarder 14 in, phase-lock loop frequency synthesizer 14-1 continues to open.In other words, the phase-lock loop frequency synthesizer 14-1 in this wireless short-range transmission system all can consumes energy in during producing logical zero and " 1 ".Therefore, the energy that uses phase-lock loop frequency synthesizer with energy efficiency to be saved remains limited.Therefore, a kind of wireless short-range transmission system need be provided, wherein, when the phase-lock loop frequency synthesizer still in when running, through the running time that increases data rate and reduce the phase-lock loop frequency synthesizer, and can save the more energy.
In addition, as previously mentioned, the wireless short-range transmission system is usually used in Wireless Keyboard.Wireless Keyboard generally comprises the keyboard of two kinds of patterns.Each key system of first kind of pattern is associated with the function of himself.The key of first kind of above-mentioned pattern for example comprise the literal spare of being arranged to the QWERTY pattern usually, function key (F1, F2, or the like), locking key, navigation key (upper and lower, or the like, and editing key (deletion, input, or the like).The key of second kind of pattern is the modifier key, and it is only had an effect at the Shi Caineng that is pressed simultaneously of the key with other.The key of second kind of pattern for example comprises Ctrl, Alt and Shift.For example, in order to import " A ", the user pushes " a " then with pushing " Shift " earlier.And as shown in Figure 3, in traditional Wireless Keyboard, when pushing " Shift ", keyboard will transmit the key of " Shift ", and when pushing " a ", said keyboard promptly transmits the key of " A ".And at receiver end, for example computer when receiving the key of " Shift ", can't be carried out any action that is associated with said display usually because " Shift " this as not having the order of meaning.Said receiver only can just can be carried out action when receiving the key of " A ", for example, on display, show character " A ".In other words, the key of " Shift " that transmits by Wireless Keyboard, it does not provide any significant function.Therefore, need a kind of Wireless Keyboard, it is through the transmission when the key that second kind of pattern only arranged (for example " Shift ") omitted data when pushing separately, and then saves the energy.Need push for a long time for not being familiar with typewriting for the user of " Shift " key, the mode of the above-mentioned saving energy has effectiveness especially.Simultaneously, for less device, palmtop device for example also maybe be longer because on the miniature keyboard of palmtop device, can more difficultly find correct text button, user to pin the duration of " Shift " key.Therefore, the ability of the saving energy even more remarkable and important in midget plant.
In addition, many conventional keyboard adopt infrared ray (IR) telltale to come transmission signals.Its scope of the magnitude of current (not comprising the electric current of operating said circuit) of operating light-emitting diodes (leds) (LED) light source is usually 40 to 100mA separately.In addition, when use was used for the infrared signal device of signal transmission, because I R telltale needs demand line (line-of-sight) operation, said Wireless Keyboard need be placed in the appropriate location with respect to said receiver.Therefore a kind of Wireless Keyboard with environmental protection wireless short-range transmission system need be provided, it can transmit signal with lower power, and does not need the demand line operation.
Summary of the invention
Fundamental purpose of the present invention provides a kind of Wireless Keyboard, to solve existing problem in the above-mentioned prior art.
In order to achieve the above object, example of the present invention can provide a kind of Wireless Keyboard, and it comprises a plurality of keys, a forwarder, an antenna and a controller.Said a plurality of key comprises the key of one group of first kind of pattern and the key of one group of second kind of pattern.Each of the key of a kind of pattern of said grade in an imperial examination all is associated with a kind of of a plurality of predetermined functions.Said controller is coupled in said a plurality of key and said forwarder.Said controller is configured to receive one first signal from said a plurality of keyed jointings, and said first signal indicates that at least one is selected in said a plurality of key; Based in the said a plurality of keys of said first signal determining selecteed at least one whether be a kind of pattern of said grade in an imperial examination key one; And if in said a plurality of key selecteed at least one be a period of time of the key of a kind of pattern of said grade in an imperial examination, promptly start said forwarder to transmit a secondary signal via said antenna.Said secondary signal carry with said a plurality of keys in the information of one in selecteed at least one said a plurality of predetermined function that are associated.
Other purpose of the present invention, benefit and character of innovation can be by following detailed example of the present invention together with attached graphic and learn.
Description of drawings
When and when reading with each alterations, take off summary before can better understanding preferable example of the present invention and preceding text specify.For reaching illustration purpose of the present invention, figure was painted with each preferable example of existing genus in each was graphic.Should be appreciated that so the accurate row that the present invention is not limited to painted puts mode and apparatus.In each is graphic:
Fig. 1 is the calcspar of an existing Wireless Keyboard 10;
Fig. 2 is the sequential chart of the signal that produced by quartz (controlled) oscillator 13, phase-lock loop frequency synthesizer 14-1, power amplifier 14-2 and forwarder 14 in the existing Wireless Keyboard of key diagram 1;
The sequential chart of the signal that Fig. 3 is produced for the wireless short-range transmission system of the existing Wireless Keyboard of key diagram 1;
Fig. 4 is the calcspar of the wireless short-range transmission system 20 of first example according to the present invention;
The sequential chart of the signal that Fig. 5 is produced by quartz (controlled) oscillator shown in Figure 4 13, phase-lock loop frequency synthesizer 24-1, power amplifier 24-2 and forwarder 24 for explanation;
Fig. 6 is the calcspar of the wireless short-range transmission system 30 of second example according to the present invention;
The sequential chart of the signal that Fig. 7 is produced by quartz (controlled) oscillator shown in Figure 6 13, quick lock in phase-lock loop frequency synthesizer 34-1, power amplifier 24-2 and forwarder 34 for explanation;
Fig. 8 is the calcspar of the Wireless Keyboard 40 of the 3rd and the 4th example according to the present invention;
The process flow diagram of the method that Fig. 9 is used to for controller as shown in Figure 8 42 is performed to judge whether forwarder 44 must be activated;
Figure 10 for explanation according to the said sequential chart that waits signal and the said signal that transmits by forwarder 44 that receives from key matrix 11 by controller 42 in the 4th example of the present invention as shown in Figure 8;
Figure 11 explanation is used to make the program of Wireless Keyboard as shown in Figure 8;
Figure 12 is the calcspar of the Wireless Keyboard 50 of the 5th example according to the present invention;
Figure 13 is for an example of illustration storer 46 shown in figure 12 and be stored in information and the synoptic diagram of the relation between the key such as said on the said keyboard in the storer 46;
Figure 14 is used to make the program of Wireless Keyboard shown in figure 12 for explanation.
Description of reference numerals: 10: Wireless Keyboard; 11: key matrix; 12: controller; 12-1: modulator; 13: quartz (controlled) oscillator; 14: forwarder; 14-1: phase-lock loop frequency synthesizer; 14-2: power amplifier; 15: antenna; 20: the wireless short-range transmission system; 22: controller; 22-1: modulator; 24: forwarder; 24-1: phase-lock loop; 24-2: power amplifier; 24-3: frequency is selected pin; 24-4: modulation pin; 30: the wireless short-range transmission system; 34: forwarder; 34-1: quick lock in phase-lock loop; 40: Wireless Keyboard; 42: controller; 44: forwarder; 46: storer; 50: Wireless Keyboard; 52: controller; T 1: time point; T 2: time point; T 3: time point; 111-115: step.
Embodiment
At present will be in detail with reference to the present invention's example shown in the drawings.All are graphic represents identical or similar part with the similar elements symbol as far as possible.Please note said etc. graphic be to plot with reduced form, according to accurate scale.
Fig. 4 is the calcspar according to the wireless short-range transmission system 20 of first embodiment of the invention.Please with reference to Fig. 4, wireless short-range transmission system 20 can comprise a controller 22, a quartz (controlled) oscillator 13, a forwarder 24 and an antenna 15, to transmit radio frequency (RF) signal.Controller 22 can comprise a modulator 22-1, and forwarder 24 can comprise a phase-lock loop (PLL) 24-1, a power amplifier (PA) 24-2, frequency selection pin 24-3 and one or more modulation pin 24-4.Controller 22 can be a microprocessor or a microcontroller.Modulator 22-1 can comprise that an amplitude key moves (Amplitude shift keying, " ASK ") modulator and an on-off keying (On-off keying, " OOK ") modulator.Phase-lock loop frequency synthesizer 24-1 is an Integer N type phase-locked loop, and it can be a digital phase locked loop frequency synthesizer or an analog phase-lock loop frequency synthesizer.
In an example according to the present invention, the assembly of said system 20 can be incorporated in the chip, and system 20 can be the form of IC (Integrated circuit, " IC ").In another example, system 20 can be the part of an IC.In addition, system 20 can be applicable to a man-computer interface device (Human interface device, " HID "), for example the keyboard on keyboard, the mobile phone, recreation rocking bar and telepilot.
The sequential chart of the signal that Fig. 5 is produced by quartz (controlled) oscillator shown in Figure 4 13, phase-lock loop frequency synthesizer 24-1, power amplifier 24-2 and forwarder 24 after controller 22 is received said triggering for explanation.At first when time point t 1, said controller starts quartz (controlled) oscillator 13 and produces reference signal REF, and it is transferred into the phase-lock loop frequency synthesizer 24-1 of forwarder 24.In case it is stable that controller 22 is judged quartz (controlled) oscillators 13, controller 22 can transmit the one first modulating signal MOD1 that produced by modulator 22-1 to phase-lock loop frequency synthesizer 24-1 via modulation pin 24-4.Phase-lock loop frequency synthesizer 24-1 is started by the first modulating signal MOD1, and can produce a carrier signal based on the frequency of reference signal REF.Said carrier signal then is transferred into power amplifier 24-2.As shown in Figure 5, phase-lock loop frequency synthesizer 24-1 is activated when time point t2, and stable when time point t 3.Want the needed time of stable phase angle locked loop frequency synthesizer 24-1 to be roughly 100 microseconds (μ s).The said time can change according to the design of phase-lock loop frequency synthesizer.Controller 22 can be counted the needed scheduled time slot of stablizing of phase-lock loop frequency synthesizer 24-1 (for example 100 μ s) and judges whether phase-lock loop frequency synthesizer 24-1 is stable through receiving from the feedback signal (not shown) of phase-lock loop frequency synthesizer 24-1 or having a counter (not shown).In case it is stable that controller 22 is judged phase-lock loop frequency synthesizer 24-1; Power amplifier 24-2 is respectively in response in the rising edge of for example one second modulating signal MOD2 and falling edge and be unlocked and close, and uses based on said carrier signal and the second modulating signal MOD2 and produces the signal behind the modulation.Therefore like Fig. 5 institute illustration, said power amplifier output can have the identical waveform with the second modulating signal MOD2.
In an example, phase-lock loop frequency synthesizer 24-and power amplifier 24-21 can order about and then close through the drop edge of the second modulating signal MOD2.In another example, phase-lock loop frequency synthesizer 24-1 can be closed after power amplifier 24-2 has been closed.The first modulating signal MOD1 and the second modulating signal MOD2 can be frequency but two signals that phase place different identical with amplitude.In an example according to the present invention, forwarder 24 can comprise a phase-delay network (not shown), and it receives one and comes the single modulating signal of self-controller 22, and produces the first modulating signal MOD1 and the second modulating signal MOD2.For example, said phase-delay network can comprise an impact damper of the delay that is used to cause the said modulating signal of receiving, produces the second modulating signal MOD2 thus, and the phase place of the wherein said second modulating signal MOD2 is different from the said modulating signal of receiving.In another example according to the present invention, two modulating signal MOD1 and MOD2 are all produced by modulator 22-1, and are sent to phase-lock loop frequency synthesizer 24-1 and power amplifier 24-2 via different modulation pin 24-4.
Phase-lock loop frequency synthesizer 24-1 can comprise a voltage-controlled oscillator (Voltage-controlled oscillator, " VCO ") and a frequency divider, and it is the assembly of power consumption among the phase-lock loop frequency synthesizer 24-1.Therefore, can be through VCO being closed phase-lock loop frequency synthesizer 24-1.In case VCO is closed, said frequency divider also will be closed.In response in first modulating signal that comes self-controller 22, said VCO can produce a carrier signal for power amplifier 24-2.Then, the signal behind the said modulation can be exchanged into a radiofrequency signal, and transmits via the antenna that is coupled in forwarder 24 15.
The phase-lock loop frequency synthesizer 24-1 of first embodiment of the invention as shown in Figure 4 does not continue to open (ON) during the whole period that the signal behind the said modulation is just being produced; Therefore; The wireless short-range transmission system 20 of first example consumes the considerably less energy according to the present invention, and has more energy efficiency than the wireless short-range transmission system in the conventional wireless keyboard.Particularly, can suppose once more: the electric current that the voltage that transmits information, logic high identical with the bit time of logic low level (being that the work period is 50%), logic high and logic low level with 1kbps is respectively 2V and 0V, operate quartz (controlled) oscillator 13, phase-lock loop frequency synthesizer 24-1 and power amplifier 24-2 is respectively 500 μ A, 5mA and 5mA.In addition, the phase-lock loop frequency synthesizer is about 1/10 of the bit time locking time usually haply.Therefore, because locking time of said phase-lock loop frequency synthesizer is enough short and can be left in the basket with respect to the bit time span, so institute's consumed current can be out in the cold during phase-lock loop frequency synthesizer locking time.In addition, in the time will being the logic low level by the signal that forwarder 24 is transmitted, the assembly phase-lock loop frequency synthesizer 24-1 that expends the energy is most closed by modulating signal MOD1/MOD2, and simultaneously, power amplifier 24-2 also is closed.Perhaps, after power amplifier 24-2 has been closed and close phase-lock loop frequency synthesizer 24-1.Therefore, be used to transmit one " 1 " and be merely 5500 μ A with the average current of one " 0 " bit, its electric current more operated than the wireless short-range transmission system in the above-mentioned conventional wireless keyboard 10 also lacks 2500 μ A.Therefore, the energy efficiency of the present invention's first example is approximately 11000nJ/bit, and its energy efficiency than the wireless short-range transmission system in the above-mentioned conventional wireless keyboard 10 is also lacked 5000nJ/bit.In addition, the present invention uses the RF signal to transmit the said signal that waits behind the modulation, and it is compared with the signal that uses the IR signal to transmit behind the modulation, has more energy efficiency, and according to Wireless Keyboard of the present invention not the needs demand line operate.Therefore, this skill professional person can understand the present invention's first example compared to traditional short distance radio transmission system, only need the less energy to come transmission information.
Fig. 6 is the calcspar according to the wireless short-range transmission system 30 of second embodiment of the invention.Second embodiment shown in Figure 6 is similar to first embodiment shown in Figure 4, and different be in, second embodiment comprises a forwarder 34; Said forwarder 34 comprises a quick lock in phase-lock loop frequency synthesizer 34-1, and it is different from the phase-lock loop frequency synthesizer 24-1 of first embodiment.Quick lock in phase-lock loop frequency synthesizer 34-1 has shorter significantly locking time compared to phase-lock loop frequency synthesizer 24-1, and can be a digital quick lock in phase-lock loop frequency synthesizer or an analog quick lock in phase-lock loop frequency synthesizer.Quick lock in phase-lock loop frequency synthesizer 34-1 for example can be an Integer N type phase-locked loop, and it is integrated to reduce said locking time with additional assemblies.For example, having proposed in an Integer N type phase-locked loop to add the auxiliary phase detector (Discriminator aided phase detector, " DAPD ") of a digital frequency discriminator is used for speed-up loop and reaches steady state (SS).Another example of quick lock in phase-lock loop frequency synthesizer 34-1 can be a fractional N-type phase-locked loop, and it has more complicated structure than said Integer N type phase-locked loop, but its locking time is shorter.When said locking time more in short-term, said bit rate possibly increase, thereby increases thus like hereinafter and with reference to the energy efficiency of the described wireless short-range transmission system 30 of Fig. 7.The method of operating of said second embodiment is the same as or similar to the method for operating of said first embodiment.
Fig. 7 for explanation after controller 22 is received said triggering, the sequential chart of the signal that is produced by quartz (controlled) oscillator shown in Figure 6 13, quick lock in phase-lock loop frequency synthesizer 34-1, power amplifier 24-2 and forwarder 34.As shown in Figure 7, be approximately 10 μ s the locking time of quick lock in phase-lock loop frequency synthesizer 34-1, lack 10 times its locking time than phase-lock loop frequency synthesizer 24-1.Therefore, the bit rate of the forwarder 34 of second embodiment is 10kbps, and its bit rate than the forwarder 24 of first embodiment is high 10 times.Therefore; According to a second embodiment of the present invention; Be used to transmit one " 1 " and one " 0 " though the average current of bit is similarly 5500 μ A; But because said bit rate is owing to increased by 10 times short locking time, the energy efficiency of second embodiment of the invention is approximately 1100nJ/bit, and its energy efficiency than first embodiment is Duoed 10 times.In other words, second embodiment of the invention uses the energy still less to come transmission information.
Fig. 8 is the calcspar according to the Wireless Keyboard 40 of third embodiment of the invention.Said Wireless Keyboard 40 comprises a wireless short-range transmission system that is similar to or is same as according to the wireless short-range transmission system of Fig. 4 and first and second embodiment shown in Figure 6.Wireless Keyboard 40 more comprises a key matrix 11 and is connected in one group of key (not shown) of key matrix 11.Controller 42 is configured to scan for key matrix 11, and then therefrom finds out one or more signal of representative " one or more key just is pressed ".If 42 receptions of one or more signal Be Controlled device of representative " one or more key just is pressed ", controller 42 can make said wireless short-range transmission system to be similar to or to be same as the signal after method according to the wireless short-range transmission system of first and second embodiment produces and transmit modulation.
Fourth embodiment of the invention is the Wireless Keyboard with assembly identical with Wireless Keyboard 40; And difference to be in, the forwarder 44 of the 4th embodiment can be to be same as or to be similar to one in forwarder as shown in Figure 1 14, forwarder 24 as shown in Figure 4 or the forwarder 34 as shown in Figure 6.The method of operating of the 4th embodiment is same as or is similar to the method for operating of the 3rd embodiment, except the controller 42 of the 4th embodiment is configured in response to start quartz (controlled) oscillator 13 and forwarder 44 in the selection signal that is received from key matrix 11.For example; The controller 42 configurable one-tenth of the 4th matrix example are in order to judge: said one or more signal that waits of being received; Whether it corresponding to first or key one or more key wherein of second kind of pattern, and judge thus: whether will start quartz (controlled) oscillator 13 and forwarder 44 with transmission information.The key of first kind of pattern each key wherein all is associated with the function of himself.The key of first kind of pattern for example comprises the text button of being arranged to the QWERTY pattern usually, function key (F1, F2, or the like), locking key, navigation key (upper and lower, or the like), and editing key (deletion, input or the like).The key of second kind of pattern is the modifier key, and it only can the generation effect when being pressed simultaneously with other key.The example of the key of second kind of pattern comprises Ctrl, Alt and Shift.
If received signal such as said is corresponding to one of them key of the key of first kind of form, controller 42 will trigger quartz (controlled) oscillator 13 and forwarder 44 with the mode that is same as or is similar to first and second embodiment.Yet, if received signal such as said only corresponding to one of them key of the key of second kind of pattern, controller 42 will can not transmit any signal and start quartz (controlled) oscillator 13 or forwarder 44.Relatively, the mode that controller 42 is adopted is, with the follow-up signal of waiting for from key matrix 11.When controller 42 was waited for follow-up signal, controller 42 can cut out the power supply of itself fully, or closes wherein some assembly.And in the alternative exemplary of the 4th embodiment; When the signal of representing a key to be pressed is received by controller 42; Quartz (controlled) oscillator 13 at first is activated; And in follow-up operation, forwarder 44 only is judged as corresponding to first or key one or more key wherein of second kind of pattern at said one or more signal that waits of being received, and time just must be activated.
Fig. 9 is a method flow diagram; Shown among the figure: digitial controller 42 from key matrix 11 received represent one or more signal that one or more keys just are being pressed after, controller 42 can carry out and judge whether must send out signal to start forwarder 44.In step 111, controller 42 scanning key matrixes 11.In step 112, controller 42 judges whether have two or more keys just to be pressed.If two or more keys just are pressed, controller 42 proceeds to step 113 and whether has a key that waits the combination of two or more keys that are pressed corresponding to said to judge.For example, the combination of " Shift " and " a " is corresponding to key " A ", yet, " Alt " and the combination of " Shift " maybe not can corresponding to any key.If exist corresponding to a said key that waits the combination of two or more keys that are pressed; 42 of controllers start quartz (controlled) oscillator 13 and forwarder 44; Or when quartz (controlled) oscillator 13 has been activated, then only start forwarder 44, and in step 115, transmit data via forwarder 44.Controller 42 can start quartz (controlled) oscillator 13 and forwarder 44; And according to above-mentioned about any method of Fig. 4 in the method such as said of first and second example shown in Figure 7, and transmit corresponding to the said said key that waits the combination of two or more keys that are pressed via forwarder 44.On the other hand, if judge the key that does not have any combination corresponding to said two or more keys that are pressed at step 113 middle controller 42, then controller 42 can not start forwarder 44.
In step 112, if judging, controller 42 only have a key just to be pressed, whether then controller 42 proceeds to step 114, be first or one of them key of key of second kind of pattern to judge the said key of pushing.If the said key that is pressed is the key of first kind of pattern, then controller 42 can proceed to step 115.Otherwise if the said key that is pressed is the key of one second kind of pattern, then controller 42 can not start forwarder 44.At last, controller 42 can be maintained at idle state or cut out power supply own, up to another signal of receiving from key matrix 11.
Figure 10 is the sequential chart of a signal, and its explanation is by the said signal sequence that wait signal and by forwarder 44 transmitted of 42 receptions of controller from key matrix 11.Shown in figure 10, when being key one one " Shift " wherein of second kind of pattern when key is pressed, do not have data and transmit through forwarder 44.Then, when " Shift " key and " a " key are pressed simultaneously, and the combination of judging said two keys is during corresponding to " A ", and forwarder 44 is seen the key of " A " off.In an example, when controller 42 received the signal of representative " one or more key just is pressed ", controller 42 can transmit the first enabling signal ACT1 to quartz (controlled) oscillator 13, used to make quartz (controlled) oscillator 13 produce a reference signal REF.Then, but controller 42 scanning key matrixes 11 judge that which key is pressed.For example, if received by controller 42 simultaneously with " a " key signals from " Shift " key signals of key matrix 11, after quartz (controlled) oscillator 13 was stable, controller 42 can transmit a modulating signal to the forwarder 44 of the key of representative " A ".
The Circuits System of Wireless Keyboard 40 comprises a printed circuit board (PCB) (Printed circuit board, " PCB ") and an IC chip usually.The manufacturing of Wireless Keyboard 40 comprises following steps usually: in wafer factory, on a wafer, make IC; Test said wafer; Encapsulate said IC; And said IC is soldered on the pcb board.Said pcb board usually according to said pcb board should be used for the design.Figure 11 explanation is used to make the program of the Wireless Keyboard 40 of one example according to the present invention.When just at design I C, have the individual pin of first number and be designated as the key that is associated with first kind of pattern, have the individual pin of second number and be designated as the key that is associated with second kind of pattern.Then, according to the design concept of said IC, and in wafer factory, make said IC.Pin based on from wafer factory is specified, and client can the position design that needs on a printed circuit board (PCB) (PCB) have a low-power keyboard or the key plate of key.Then, said client's PCB can make according to this.Therefore; Can judge according to the controller 42 in the Wireless Keyboard 40 of said method manufacturing whether the signal of being received from key matrix 11 represents the key of first kind of pattern or the key of second kind of pattern, and judge whether will transmit signal via forwarder 44 according to the method for the above-mentioned Fig. 9 of being associated with.
Wireless Keyboard 40 according to the present invention can be used at least a operation in following two kinds of patterns: start-up mode, when it transmits information for using Wireless Keyboard 40 as the user; And standby, it is when the user is not using Wireless Keyboard 40.When Wireless Keyboard 40 operated in start-up mode, controller 42 is the method described in the execution graph 9 repeatedly, up to the time of having passed through a scheduled period, during this period in, controller 42 does not have any signal that receives from key matrix 11.After having passed through the said scheduled period, Wireless Keyboard 40 switches to standby mode.When Wireless Keyboard 40 during at standby mode, all said power supplys of assemblies that wait can be closed in said Wireless Keyboard.When its during at standby mode, the signal that controller 42 receives from key matrix 11, controller 42 then switches to start-up mode and begins the described program of Fig. 9.
Figure 12 is the calcspar according to the Wireless Keyboard 50 of fifth embodiment of the invention.Wireless Keyboard 50 is similar to the Wireless Keyboard 40 according to fourth embodiment of the invention; And different be in: Wireless Keyboard 50 more comprises a storer 46; Some information have wherein been stored in advance; It is the mapping information that waits key with respect to the address of said storer about said, and to indicate each key be the information of key of key or second kind of pattern of first kind of pattern.Controller 52 is configured to based on said one or more signal of being received from key matrix 11 and is stored in the information in the storer 46 in advance, to judge that whether said one or more signal that waits of being received is corresponding to the key of first kind of pattern or key one or more key wherein of second kind of pattern.
Figure 13 for an example of illustration storer 46 and be stored in the storer 46 information and keyboard 50 the above etc. key between relation graphic.Each key on keyboard 50 is mapped to the address in the storer 46.Whether the content on each address is represented the pairing key of said address is one of them key of key of key or second kind of pattern of first kind of pattern.For example, the key of first kind of pattern can be represented in " 0 ", and the key of second kind of pattern can be represented in " 1 ".
Figure 14 explanation is used to make the program of the Wireless Keyboard 50 of one example according to the present invention.When the design phase, decide the position of each key on pcb board by client or application mode, and pcb board is promptly according to the above-mentioned position that determines and make.Since when the stage of the said pcb board of design according to the kind of each key and for the coiling that each key carried out, its can since the structure of complicated and the said coiling complicacy of said coiling thicken and be limited; Therefore, when just at design I C, all keys are dimensioned to transmit signal.And,, and in wafer factory, make said IC according to the design of IC design.About the position of each key and kinds of information can be during wafer sort, IC encapsulation or said IC be soldered on the said pcb board after quilt recorded in the middle of the storer 46.Through making said Wireless Keyboard according to above-mentioned program, said keyboard can be according to application mode and client's needs and is customized.For example, the distribution of the keyboard of palmtop device can be different from the distribution of desktop or kneetop computer.Therefore, can be different in the position of the above key such as grade of each keyboard.Through above-mentioned program, said IC can make all said bond energys that waits enough transmit signal via special design.In case determined the client or the application mode of said keyboard, the non-transport property of the key of second kind of pattern such as said grade can realize through during wafer sort, IC encapsulation or after said IC is soldered on the said pcb board, information being recorded in the said storer.Therefore, can provide and have different size and the Wireless Keyboard of prodigiosin source efficiency.
In explanation during representative examples of the present invention, this instructions has proposed to operate said method of the present invention and/or the program step as a particular order.But the above method or program can't rely on the step of the particular order that goes out mentioned herein to a certain degree, and said method or program should not be limited to described specific sequence of steps such as said.Can understand like this skill professional person, other sequence of steps also is feasible.The step of the particular order that therefore, is proposed in this manual should not be regarded as the restriction for claim.In addition, should not be limited to the usefulness of the step in institute's proposition order about the claim of method of the present invention and/or program, this skill professional person can understand order such as said immediately and can change, and still maintains in spirit of the present invention and the scope.
Claims (10)
1. Wireless Keyboard is characterized in that it comprises:
A plurality of keys, wherein said a plurality of keys comprise one group of first kind of key and one group of second kind of key, and each of said a plurality of first kind of key is associated with one of a plurality of predetermined functions;
One forwarder;
One antenna; And
One controller, it is coupled in said a plurality of key and said forwarder, and wherein said controller is configured to:
Receive one first signal from said a plurality of keyed jointings, said first signal indicates that at least one is selected in said a plurality of key,
Based in the said a plurality of keys of said first signal determining selecteed at least one whether be of said a plurality of first kind of key, and
If in said a plurality of key selecteed at least one when being one of said a plurality of first kind of key; Promptly start said forwarder transmitting a secondary signal via said antenna, wherein said secondary signal carry with said a plurality of keys in one information of selecteed at least one said a plurality of predetermined function that are associated.
2. according to the Wireless Keyboard of claim 1, it is characterized in that said controller more is configured to:
Judge said a plurality of keys selecteed at least one whether comprise two or more keys, and
If said a plurality of keys selecteed at least one comprise two or more keys; Said controller is configured to more to judge that whether the combination of two or more keys such as said is corresponding to one of said a plurality of predetermined functions; And if the combination of said two or more keys is during corresponding to one of said a plurality of predetermined functions; Start said forwarder to transmit one the 3rd signal via said antenna, the information of one of said a plurality of predetermined functions that wherein said the 3rd signaling bearer is associated with the said combination of said two or more keys.
3. according to the Wireless Keyboard of claim 2; It is characterized in that each of said a plurality of second kind of key only just is associated with one of said a plurality of predetermined functions when another person at least when each and said a plurality of keys of said a plurality of second kind of key is received by said controller.
4. according to the Wireless Keyboard of claim 3, it is characterized in that,
Said group of first kind of key comprises letter, numeral, symbol, punctuation mark key, imports, gives up the throne, in hurdle race and the caps lock key at least one, and said group of second kind of key comprises in control, displacement and the shift key at least one.
5. according to the Wireless Keyboard of claim 1, it is characterized in that, more comprise:
One storer, it is coupled to said controller, wherein said memory configurations becomes to store predetermined information, said predetermined information indicate said a plurality of keys each as one of one or said a plurality of second kind of key of said a plurality of first kind of key, and wherein
Said storer comprises a plurality of memory locations; Each memory location is by storer address institute identification; Said memory configurations becomes to store predetermined mapping information; Said predetermined mapping associating information is in said a plurality of keys and said a plurality of memory location, and each of said a plurality of memory locations stores the flag of the said corresponding key of indication as said first kind of key or said second kind of key, and
Said controller based on said predetermined information judge in said a plurality of key selecteed at least one whether be of said a plurality of first kind of key.
6. according to the Wireless Keyboard of claim 1, it is characterized in that, more comprise:
One first oscillator; And
Wherein said forwarder more comprises:
One phase-lock loop frequency synthesizer; Be used to receive from a reference signal of said first oscillator and one first modulating signal from said controller, wherein said phase-lock loop frequency synthesizer is configured to by the said first modulating signal unlatching to produce a carrier signal based on said reference signal; And
One power amplifier; Be used to receive said carrier signal and one second modulating signal from said phase-lock loop frequency synthesizer; Wherein said power amplifier is configured to opened and closed by said second modulating signal; Produce said secondary signal and use based on said carrier signal; Wherein said power amplifier is unlocked after said phase-lock loop frequency synthesizer is stable, and said phase-lock loop frequency synthesizer is along with said power amplifier cuts out, or after said power amplifier has been closed, closes.
7. according to the Wireless Keyboard of claim 6, it is characterized in that said forwarder more comprises a frequency and selects pin and at least one modulation pin;
Said phase-lock loop frequency synthesizer selects pin to receive said reference frequency signal from said first oscillator via said frequency, and receives said first modulating signal via said at least one modulation pin from said controller;
Said power amplifier receives said second modulating signal via said at least one modulation pin from said controller; And
Said controller comprises an amplitude key and moves and one of on-off keying modulator, is used to produce said first modulating signal and said second modulating signal, and wherein said first modulating signal is identical with the frequency and the amplitude of said second modulating signal, but phase place is different.
8. according to the Wireless Keyboard of claim 7, it is characterized in that said controller is configured to:
Transmit one the 3rd signal to said first oscillator to start said first oscillator;
Transmit said first modulating signal to said at least one modulation pin, to start said phase-lock loop frequency synthesizer a period of time in following situation:
(i) when said controller when said first oscillator receives stable one first feedback signal of said first oscillator of representative indication, and
(ii) after one first scheduled time slot, said first scheduled time slot is the time of stablizing said first oscillator; And
Transmit said second modulating signal to said power amplifier in a period of time of following situation:
(i) when said controller when said phase-lock loop frequency synthesizer receives representative and shows stable one second feedback signal of said phase-lock loop, and
(ii) after one second scheduled time slot, said second scheduled time slot is the time of stablizing said phase-lock loop frequency synthesizer.
9. according to the Wireless Keyboard of claim 7, it is characterized in that, more comprise a key array, wherein
Said controller is configured to receive said first signal that at least one key of the said Wireless Keyboard of indication is being pressed from said a plurality of keys via said key array.
10. according to the Wireless Keyboard of claim 6, it is characterized in that,
Said controller comprises one of a microprocessor and a microcontroller;
Said phase-lock loop frequency synthesizer one of comprises in a digital phase locked loop frequency synthesizer, an analog phase-lock loop frequency synthesizer, a digital quick lock in phase-lock loop and the analog quick lock in phase-lock loop; Wherein said phase-lock loop frequency synthesizer more comprises one second oscillator, and said phase-lock loop frequency synthesizer is through opening or cut out said second oscillator and be unlocked or cutting out; And
Conversion of signals behind the said modulation becomes a radiofrequency signal and transmits.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW100108123A TWI520167B (en) | 2011-03-10 | 2011-03-10 | Low power wireless keyboard |
| TW100108123 | 2011-03-10 |
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| Publication Number | Publication Date |
|---|---|
| CN102681668A true CN102681668A (en) | 2012-09-19 |
| CN102681668B CN102681668B (en) | 2015-06-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210030380.4A Expired - Fee Related CN102681668B (en) | 2011-03-10 | 2012-02-10 | Low power wireless keyboard |
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| TW (1) | TWI520167B (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| TWI547832B (en) * | 2015-07-06 | 2016-09-01 | Dexin Corp | An input device with adaptive adjustment and its adjustment method |
| WO2017183888A2 (en) | 2016-04-19 | 2017-10-26 | Samsung Electronics Co., Ltd. | Positioning method and apparatus |
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| CN1125334A (en) * | 1994-12-19 | 1996-06-26 | 巨太国际股份有限公司 | Wireless keyboard system of computer |
| CN1185603A (en) * | 1996-12-18 | 1998-06-24 | 王林 | Method for inputting Chinese punctuation and mark by keyboard |
| US5854621A (en) * | 1991-03-19 | 1998-12-29 | Logitech, Inc. | Wireless mouse |
| US7151915B2 (en) * | 2001-09-26 | 2006-12-19 | Nokia Corporation | Dual mode voltage controlled oscillator having controllable bias modes and power consumption |
| US20070253468A1 (en) * | 2006-05-01 | 2007-11-01 | Micrel Inc. | Spread Spectrum ASK/OOK Transmitter |
| US20080195762A1 (en) * | 2007-02-13 | 2008-08-14 | Wood Michael C | Multifunction data entry device and method |
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2011
- 2011-03-10 TW TW100108123A patent/TWI520167B/en active
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2012
- 2012-02-10 CN CN201210030380.4A patent/CN102681668B/en not_active Expired - Fee Related
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5854621A (en) * | 1991-03-19 | 1998-12-29 | Logitech, Inc. | Wireless mouse |
| CN1125334A (en) * | 1994-12-19 | 1996-06-26 | 巨太国际股份有限公司 | Wireless keyboard system of computer |
| CN1185603A (en) * | 1996-12-18 | 1998-06-24 | 王林 | Method for inputting Chinese punctuation and mark by keyboard |
| US7151915B2 (en) * | 2001-09-26 | 2006-12-19 | Nokia Corporation | Dual mode voltage controlled oscillator having controllable bias modes and power consumption |
| US20070253468A1 (en) * | 2006-05-01 | 2007-11-01 | Micrel Inc. | Spread Spectrum ASK/OOK Transmitter |
| US20080195762A1 (en) * | 2007-02-13 | 2008-08-14 | Wood Michael C | Multifunction data entry device and method |
Also Published As
| Publication number | Publication date |
|---|---|
| TWI520167B (en) | 2016-02-01 |
| TW201237905A (en) | 2012-09-16 |
| CN102681668B (en) | 2015-06-17 |
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