CN1139866C

CN1139866C - Power saving type infra-red keyboard transferring method

Info

Publication number: CN1139866C
Application number: CNB981078087A
Authority: CN
Inventors: 郭世仁
Original assignee: Behavior Technical Computer Corp
Current assignee: Behavior Technical Computer Corp
Priority date: 1998-04-30
Filing date: 1998-04-30
Publication date: 2004-02-25
Anticipated expiration: 2018-04-30
Also published as: CN1233792A

Abstract

The present invention relates to an electricity-saving infrared keyboard transmission method which comprises the following steps: a microprocessor in a transmission module group of the wireless keyboard adopts a series signal transmission mode; before a transmission signal of the first data bit of keyboard keys, trackballs, mouse buttons and control commands thereof transmits infrared rays, serial identification transmission signals of a guidance code and a start code which have characteristic time periods are added at the front end of the transmission signals of a data bit group; the signals together with the data bit are together transmitted to a receiving mould group of the wireless keyboard; after the microprocessor of the receiving mould group of the wireless keyboard receives the data bit group, the guidance code and the start code, the guidance code and the start code are used as the judging basis for the reception and storage of the data bit signals so as to make the microprocessor correctly and rapidly carry out decoding, storage and post-treatments to the received data bit group.

Description

Power saving type infra-red keyboard transferring method

The present invention relates to a kind of power saving type infra-red keyboard transferring method, particularly be applied to computer infrared keyboard emitting mould train and receive the signal transmission between module and receive discern.

PC is used in industry and commerce information processing now widely, and for example, information transportation, commercial intercourse, client's communication, document are handled ... or the like the work of complicated inconvenience in the past, all can PC do, therefore, PC also just displays thus especially for the importance of daily life, yet, be the most important input media in the personal computer equipment, nothing more than being keyboard, therefore, whether the operation facility of keyboard, will directly influence the running of this personal host computer.

In general PC, keyboard no doubt can make the smooth input information of operator, but keyboard often is subject to and host computer between connecting line, and making keyboard go up moving in operation, the scope of setting up is restricted, therefore, a kind ofly be transmitted as main Wireless Keyboard with infrared signal and also just arise at the historic moment, in this Wireless Keyboard structure, comprise the infrared signal sending and receiving mechanism that is installed on keyboard and the connection host computer, can make keyboard do wireless operation.Yet, in Wireless Keyboard, the emission of this infrared signal and reception, dominating the keyboard pressure in fact is sent in the host computer by reaching the mouse control order, so the degree of accuracy and the speed of this infrared and reception, then will influence the Operational Figure Of Merit and the service efficiency of this Wireless Keyboard, in fact be one of quite important ring in the Wireless Keyboard structure.

In the emission of Wireless Keyboard infrared signal and reception structure of tradition, only the information that will transmit and control command are encoded and launched, and decoded by receiving end, so usually for raising information in transmission course, the signal of this receiving end receives correct probability and prevents that the noise of other infrared transmitter from disturbing, so the signal pulse wave time cycle in this infrared signal must be elongated, to increase the signal decoding accuracy of receiving end, and cause the infrared signal in this Wireless Keyboard to launch consumed power and time, also increase relatively, cause the power consumption height of Wireless Keyboard, cause taking time and often change battery, cause Wireless Keyboard in using operation to go up the formation puzzlement.

In addition, the infrared signal emission and the receive mode of this kind Wireless Keyboard, because signal is in transmission course, the situation that data loss or dialysis are arranged unavoidably, for example: when the operate wireless keyboard, this button is pressed by operation uncertain, and the interrupted not clear signal of generation, in case and in the situation of this transmit dialysis or data loss, to cause the phenomenon that to discern and to continue at the infrared ray receiving end, cause this Wireless Keyboard receiving end to form that lump-sum data signal can't be decoded or the puzzlement of decoding error, and must heavily cover emission by repeatedly pressing by operate wireless keyboard and infrared signal, can make it correct receives and decoding, cause the Operational Figure Of Merit and the degree of accuracy of this Wireless Keyboard generally on the low side, and make the unnecessary power wastage of formation, and influence the operating effect of this Wireless Keyboard and use wish, be the present Wireless Keyboard problem that institute's utmost point need solve in practicality in fact.

Fundamental purpose of the present invention is to provide a kind of power saving type infra-red keyboard transferring method, cycle time of the signal pulse wave of this Wireless Keyboard data transmission can significantly be shortened, the emission power loss of infrared signal is reduced, and make the infrared signal of Wireless Keyboard launch the effect that reaches power saving.

The present invention's a purpose again is to provide a kind of power saving type infra-red keyboard transferring method, can make the data signal of the infrared of this Wireless Keyboard, can be at signal dialysis or not clear state, still can correctly do the action of reception, decoding and filtering signals, the Operational Figure Of Merit of Wireless Keyboard integral body is improved.

The object of the present invention is achieved like this, a kind of power saving type infra-red keyboard transferring method, it is characterized in that: be in the infrared module of this Wireless Keyboard, this microprocessor the keyboard data with a tandem transmit with trace ball and mousebutton data transmit deliver to infrared transmitter emission before, transmit and transmit the first data bits tuple front end among both of trace ball and mousebutton data in this keyboard data, at least add a preamble code and initial code, so that the infrared ray of Wireless Keyboard receives module when receiving, can be whether at the reception of this preamble code and initial code, the keyboard data that receives as this institute foundation that the data identification that transmits with trace ball and mousebutton data is judged that transmits, so that this reception module can be done follow-up reception decoding to this keyboard data each data bits tuple that transmits with trace ball and mousebutton data that transmits, temporary processing, wherein: this preamble code is that periodic signal constitutes sometime, in cycle time of this preamble code, this noble potential time cycle and electronegative potential time cycle are certain ratio; This initial code is that a time periodic signal constitutes, and in cycle time of this initial code, this noble potential time cycle is 1: 1 with electronegative potential time cycle ratio.

Owing to adopted above-mentioned technical solution, before microprocessor in the Wireless Keyboard emitting mould train transmits with the emission of tandem signal, at this keyboard, trace ball, the front end that transmits of first data bits tuple of mousebutton and control command thereof adds the tandem identification transmission signals of a preamble code and initial code, together with this data bits tuple, together emission sends this Wireless Keyboard to and receives module, the microprocessor that is received module by Wireless Keyboard is in receiving this data bits tuple, behind preamble code and the initial code, draw sign indicating number sign indicating number and initial code rises up to basis for estimation as reception that receives data bits tuple signal and data base with this, make this little processing to receive and the data bits tuple do correct rapid identification, store and decoding, and time signal period of the data bits tuple of this Wireless Keyboard can be shortened, to reach the purpose that makes Wireless Keyboard signal emission power saving.

The present invention's detailed construction and practical operation will be made it clearly by following detailed explanation, simultaneously, enumerate a preferred embodiment, and with relevant drawings, it is more cheer and bright that its technology contents and structure space form are able to, wherein:

Fig. 1 is the square circuit diagram of Wireless Keyboard emitting mould train among the present invention;

Fig. 2 is the keyboard data and the control signal sequential chart of the present invention's Wireless Keyboard emitting mould train emission;

Fig. 3 is trace ball, mousebutton data and the control signal sequential chart of the present invention's Wireless Keyboard emitting mould train emission;

Fig. 4 is the system flowchart of the infrared signal emission of Wireless Keyboard emitting mould train emitting mould train among the present invention;

Fig. 5 is the data testing process figure of the infrared signal emission of Wireless Keyboard emitting mould train among the present invention;

Fig. 6 is the square circuit diagram that Wireless Keyboard receives module among the present invention;

Fig. 7 is the process flow diagram that Wireless Keyboard receives the infrared signal reception of module among the present invention;

At first see also shown in Figure 1, what Fig. 1 was shown is in the power saving type infra-red keyboard transferring method of the present invention, the hardware circuit structure of the infrared module of this Wireless Keyboard, below will represent this emitting mould train with 100 labels, this emitting mould train 100 is the direct current power supply (not shown) of being dependent on independence, comprise a microprocessor 10, this microprocessor 10 tools decoding, coding, the function of timing and generation infrared signal, system connects a keyboard unit 20, press the push button signalling that is produced by operation with the key-press matrix (not shown) that receives keyboard unit 20, and after being decoded, recompile, producing one, launch with infrared signal via an infrared transmitter 30 with respect to keyboard data the transmitting of KT (as shown in Figure 3) that transmit; One trace ball and mousebutton unit 40, system also is contained in the emitting mould train 100, with 20 operations of modifier key unit, make the usefulness of vernier for computer location, in the same manner, this trace ball and mousebutton unit 40 are to be produced track position and mousebutton signal to little processing 10 by operation, after these microprocessor 10 decodings, recompile produces a trace ball and the mousebutton MT that transmits, and produces relative transmitting again, launches via this infrared transmitter 30.

Please cooperate shown in Figure 2 again, Fig. 2 shows the transmit signal timing diagram of KT of the above-mentioned keyboard data that is produced in little processing 10 of emitting mould train 100, it is the signal of tandem kenel, comprise a preamble code (LEADERCODE) LC according to front and back order (being that Fig. 2 is right by a left side) arrangement, one initial code (START CODE) SC, two data bits tuples (DATA BYTE) DB1 and DB2, accidental resemblance bit code (PARITY CODE) PD, wherein, cycle time of this preamble code LC is regardless of, can comply with need being stipulated of identification, preferred embodiment in the present invention is 1800 μ S (microsecond), and this noble potential Th cycle length (being the time length of numerical digit signal positive logic " 1 ") and electronegative potential T1 cycle length (the time length of numerical digit signal positive logic " 0 ", be certain ratio, the ratio of preferred embodiment in the present invention is 1: 1.25; And cycle time of this initial code SC also is regardless of, also can come to be ordered surely according to the demand difference of identification, the embodiment that adds in the present invention is 600 μ S, and this noble potential Th1 cycle length and electronegative potential T11 cycle length also are certain ratio, the present invention's preferred embodiment is 1: 1, therefore, after defining above-listed preamble code LC and initial code SC, the transmission identification that then can be used as the data bits tuple DB1 that is next to the back and DB2 reach up to putting differentiation.

Above-mentioned data bits tuple DB1 shown in Figure 2 and DB2 system are made of eight data bit B0～B7 and K1～K7 respectively, the pulse wave time cycle BT of this each data bit B0～B7 and K1～K7, be all identical, preferred embodiment in the present invention is 600 μ S, when data is numerical digit positive logic " 1 ", then represent with noble potential time cycles 600 μ S; Otherwise, when data is positive logic " 0 ", then represent with each 300 μ S of noble potential time cycle and electronegative potential time cycle, and can be more general known Wireless Keyboard transmission cycle shortens 1/3 and this accidental resemblance bit code PD system is added in respectively after this last data bit B7 and the K7, appearance within data bit group DB1 and the DB2 is checked and error detection with doing in transmission course; And the controlled variable of the data bits tuple B0 among this data bits tuple DB1～B7 system this emitting mould train 100 of record and this keyboard unit 20, comprise user's channel, heavily cover button, direct current power supply state, by functions such as key class differentiations, be known Wireless Keyboard function, so will not describe in detail; Data bit K1～K7 of this data bits tuple DB2 then represents the relative enciphered data of each button in this push-button unit 20, for example: and ASCII, and button is pressed data such as the state of pressing.

Please consult shown in Figure 3 again, Fig. 3 shows the transmit signal timing diagram of MT of trace ball that the microprocessor 10 of this emitting mould train 100 among above-mentioned Fig. 1 is produced and mousebutton data, it is the signal of tandem kenel, comprise a preamble code LC, an initial code SC, three data bits tuple DB3 and DB4, DB5, accidental resemblance bit code according to front and back order (being that Fig. 3 is right by a left side) arrangement) PD, wherein, time signal period of this preamble code LC and initial code SC and function are fully identical with this keyboard data shown in Figure 2 KT that transmits.

Above-mentioned data bits tuple DB3, DB4 shown in Figure 3 and DB5 system are made of eight data bit D0～D7, X1～X7 and Y1～Y7 respectively, and this accidental resemblance bit code PD system is added in respectively after this last data bit D7, X7 and the Y7, to check and error detection holding within data bit group DB3, DB4 and the DB5 with work in transmission course; And the controlled variable and the mousebutton data of the data bits tuple D0 among this data bits tuple DB3～trace ball that D7 system record is somebody's turn to do, the pressure that comprises user's channel, mousebutton (comprising the left, center, right key) is pressed functions such as state, be known Wireless Keyboard function, so will not describe in detail; Data bit X1～X7 of this data bits tuple DB4 then represents the trace ball of this emitting mould train 100 and the coordinate data of the trace ball X-axis in the mousebutton unit 40; Data bit Y1～Y7 of data bits tuple DB5 then represents the trace ball of this emitting mould train 100 and the coordinate data of the trace ball Y-axis in the mousebutton unit 40 in addition.

Please cooperate shown in Figure 4 again, Fig. 4 is among the present invention, these keyboard data shown in Figure 2 of emitting mould train 100 emission of this Wireless Keyboard transmit system flow of MT of KT and trace ball shown in Figure 3 and mousebutton data that transmits, at first in step 210, it is the processing procedure that transmits preamble code LC, be that promptly this keyboard data shown in Figure 2 transmits bit group DB1 among the KT and DB2 before microprocessor 10 is delivered to infrared transmitter 30, earlier by the definition of little processing 10 according to Fig. 2, produce this preamble code LC add before this data bits tuple DB1 and the DB2 end in advance emission send, similarly, preamble code LC also is incorporated in transmit data bits tuple DB3 among the MT of trace ball and mousebutton data, emission is sent before DB4 and the DB5; Step 220, then for transmitting the processing procedure of this initial code SC, promptly by this microprocessor 10 after producing preamble code LC, soon produce this initial code SC to place after the preamble code LC, and transmit subsequently and launch.

Step 230 and step 240, system is respectively the treatment step of timing (START TIMER) and timing interruption (TIMERINTERRUPT ENABLE), promptly transmit behind the preamble code LC and initial code SC of MT carrying out transmit KT and trace ball and mousebutton data of the above-mentioned keyboard data of emission, launch this data bits tuple DB1 in succession, DB2 and DB3, DB4, during DB5, the clocking capability that must start in little processing 10 is monitored this data bits tuple DB1, DB2 and DB3, DB4, whether DB5 sends out really, and per 1/3rd cycle in burst length BT timing are interrupted once, to check each data bit B0～B7, K1～K7 and D0～D7, X1～X7, whether Y1～Y7 sends out really.

Please consult shown in Figure 5 again, Fig. 5 is in the system flow of displayed map 4, should be in order to detect and to handle each data bit B0～B7, K1～K7 and D0～D7, X1～X7, Y1～Y7 delivers to the flow process of infrared transmitter 40 emissions of emitting mould train 100, these flow process systems can be installed in the microprocessor 10 of emitting mould train 100 in the software program mode to carry out, this software program is not the present invention's a category, so will not describe in detail, wherein, step 300～350, fasten the timing interrupt procedure that the step 240 stated among Fig. 4 is carried out, wherein should interrupt timing partly, whether system checks a data bit B0～B7, K1～K7 and D0～D7, X1～X7, whether Y1～Y7 finishes, do not launch if not then suspend earlier, promptly this infrared transmitter 40 is not done the action of any emission, continues to finish this whole data bit B0～B7, K1～K7 and D0～D7, X1～X7, the timing inspection of Y1～Y7; If finished a data bit B0～B7, K1～K7 and D0～D7, X1～X7, the timing inspection of Y1～Y7, then judge whether to have finished whole data bits tuple DB1 again, DB2, and DB3, DB4, disconnected timing action among the DB5, this can be added on each data bits tuple DB1, DB2 and DB3, DB4, accidental resemblance bit code PD between DB5 is discerned, if finished whole data bits tuple DB1, DB2 and DB3, DB4, disconnected timing among between DB5, then whether row differentiates all data bits tuple DB1 again, disconnected timing among between DB5, then whether row differentiates all data bits tuple DB1 again, DB2 and DB3, DB4, B5 has all finished the interruption timing, then stops everything if finished; If do not finish and then continue disconnected timing among next data bits tuple DB1, DB2 and DB3, DB4, the DB5.

Step 360～the step 370 in this Fig. 5 in addition, then shown each data bit B0～B7, K1～K7 and D0～D7, X1～X7, Y1～Y7 delivers to the flow process of infrared transmitter 30 emissions, promptly one of above-mentioned steps 300～350 complete data bit B0～B7 must be finished, K1～K7 and D0～D7, X1～X7, disconnected timing among Y1～Y7, and do not finish whole data bits tuple DB1, DB2 and DB3, DB4, disconnected timing among the DB5, the side carries out this each data bit B0～B7 one by one, K1～K7 and D0～D7, X1～X7, the data content of Y1～Y7 is done the action of infrared, wherein, system judges this data bit B0～B7 earlier, K1～K7 and D0～D7, X1～X7, hold within Y1～Y7 that this can be judged by the time of the noble potential of above-mentioned Fig. 2 and PRT BT shown in Figure 3 and the time of electronegative potential for numerical digit signal positive logic it " 1 " or positive logic it " 0 ", then be the state of emission by these microprocessor 10 these infrared transmitter 30 of life if data is a positive logic it " 0 "; Otherwise data is that positive logic it " 1 " is not then ordered this infrared transmitter 30 and transmitted, and the signal that this send action system is received because of the infrared receiver 410 (as shown in Figure 6) at reception module 400 is due to the reverse logic signal.

Please cooperate shown in Figure 6 again, be among the present invention in the power saving type infra-red keyboard transferring method, the infrared ray of this Wireless Keyboard receives the hardware circuit structure of module, wherein, this reception module 400 is the power work that uses a computer PC to be supplied, comprise an infrared receiver 410 and microprocessor 420, the infrared signal of this infrared receiver 410 Wireless Keyboard that to be reception launched from the infrared transmitter in the emitting mould train 100 30, and these little processing 420 cordings have decoding, coding, functions such as temporary data, system with infrared transmitter 30 transmission of this infrared receiver 410 emitting mould train that receives 100 with respect to this Fig. 2 and keyboard data shown in Figure 3 transmit the preamble code LC among the MT of KT and trace ball and mousebutton that transmits, initial code SC, data bits tuple DB1, DB2, DB3, DB4 and DB5, data such as coupling bit code PD, it is temporary to be decoded, and after finishing decoding, again compile and be keyboard signal and trace ball with respect to computer PC, the mousebutton signal, and send among the computer PC.

Please consult shown in Figure 7 again, should receive the received signal decoding of module 400 in Fig. 7 displayed map 6, temporary flow process, and these flow processs also can be formulated as software program and are stored in and are provided with in this microprocessor 420 carrying out, in the same manner, the also non-the present invention's of this software program emphasis, so also not to describe in detail, wherein, step 500～520, be to judge and whether be somebody's turn to do data for beginning the state of reception, promptly whether receive and judge, if receive, then directly carry out transmit preamble code LC among the MT of this data tuple mousebutton by this preamble code LC and initial code SC, initial code SC, data bits tuple DB1, DB2, DB3, the reception work of DB4 and DB5 content; And step 530～step 533, system shows reception decoding and the temporary flow process of first data bits tuple DB1 or the DB3 of this data bits tuple DB1, DB2, DB3, DB4 and DB5, the owner will judge whether to finish receiving fully via accidental resemblance bit code PD, and whether the data content that is received is wrong; Step 540～544 item show the receptions decoding of second the data bits tuple DB2 of this data bits tuple DB1, DB2, DB3, DB4 and DB5 or DB4, the flow process of temporary and keyboard data judgement storage, also mainly judge via accidental resemblance bit code PD whether this data receives fully, and whether the data that is received is wrong, and judge whether subsequently to be the keyboard data, if the keyboard data then is stored in the microprocessor 420; Reception decoding, the temporary flow process that reaches trace ball, mousebutton data of the 3rd the data bits tuple DB5 of step 550～step 553 this data bits tuple of demonstration DB1, DB2, DB3, DB4 and DB5, also mainly judge via coupling bit code PD whether this data receives fully, and whether the data that is received is wrong, if correctly then trace ball, the mousebutton of gained is stored in this microprocessor 420.

Therefore, power saving type infra-red keyboard transferring method by above Fig. 1～the present invention shown in Figure 7, system can and receive the degree of accuracy and the sensitivity raising of the infrared signal transmission of 400 of modules with the emitting mould train 100 of Wireless Keyboard, and be in the emitting mould train 100, the send action time of this infrared transmitter 30 is shortened, and it is accurately more efficient, and reaches the target of saving power loss; On the other hand, at the receiving side signal face that receives module 400, also can be by the adding of this preamble code LC and minimum SC, signal recognition when receiving is held clearly more, and make the probability of data dialysis or loss, can greatly reduce, and then significantly improve this Wireless Keyboard in the last efficient of signal transmission.

Power saving type infra-red keyboard transferring method in last Fig. 1 of institute～the present invention that Fig. 7 discloses, be the present invention for being illustrated one of cited two preferred embodiments of technology contents, and it is not enough in order to arrest limit the present invention's category, such as the equivalent substitution of making thin portion changes in modification and element at the present invention's technological means and method is when the invention spirit and the category that do not take off the present invention.

Claims

1. power saving type infra-red keyboard transferring method, it is characterized in that: be in the infrared module of this Wireless Keyboard, this microprocessor the keyboard data with a tandem transmit with trace ball and mousebutton data transmit deliver to infrared transmitter emission before, transmit and transmit the first data bits tuple front end among both of trace ball and mousebutton data in this keyboard data, at least add a preamble code and initial code, so that the infrared ray of Wireless Keyboard receives module when receiving, can be whether at the reception of this preamble code and initial code, the keyboard data that receives as this institute foundation that the data identification that transmits with trace ball and mousebutton data is judged that transmits, so that this reception module can be done follow-up reception decoding to this keyboard data each data bits tuple that transmits with trace ball and mousebutton data that transmits, temporary processing

Wherein:

This preamble code is that periodic signal constitutes sometime, and in cycle time of this preamble code, this noble potential time cycle and electronegative potential time cycle are certain ratio;

This initial code is that a time periodic signal constitutes, and in cycle time of this initial code, this noble potential time cycle is 1: 1 with electronegative potential time cycle ratio.

2. power saving type infra-red keyboard transferring method according to claim 1 is characterized in that, wherein the data bits tuple that transmits of this keyboard data is to be made up of several data bits.

3. as the power saving type infra-red keyboard transferring method as described in the claim 2, it is characterized in that, the data bit in this data bits tuple wherein, be comprise user's channel, heavily cover button, direct current power supply state, by data such as key class differentiations.

4. power saving type infra-red keyboard transferring method according to claim 1 is characterized in that, wherein this trace ball and mousebutton data transmit and comprise several data bits compositions.

5. as the power saving type infra-red keyboard transferring method as described in the claim 4, it is characterized in that the data bit in this data bits tuple wherein comprises and comprises that trace ball vernier coordinate and mousebutton press the data by state.

6. as the power saving type infra-red keyboard transferring method as described in the claim 1,2 or 4, it is characterized in that, wherein, this keyboard data transmits and transmit last the data bit rear end of each the data bits tuple among both of trace ball and mousebutton data adds an accidental resemblance bit code, with the foundation as this data bits tuple Content inspection.

7. power saving type infra-red keyboard transferring method according to claim 1 is characterized in that, the infrared module system of this Wireless Keyboard comprises a little processing and an infrared receiver.

8. as the power saving type infra-red keyboard transferring method as described in claim 1 or 7, it is characterized in that, wherein the infrared ray in this Wireless Keyboard receives in the module, this little processing, tool decoding, coding and temporary function, so that preamble code and initial code that this infrared receiver was received are discerned judgement, to transmit as this keyboard data and the transmit reception foundation of the data bits tuple among both of trace ball and mousebutton data.