CN101872172B - Sleep mode power saving method, keyboard control circuit and triangular scanning keyboard - Google Patents
Sleep mode power saving method, keyboard control circuit and triangular scanning keyboard Download PDFInfo
- Publication number
- CN101872172B CN101872172B CN2009101350726A CN200910135072A CN101872172B CN 101872172 B CN101872172 B CN 101872172B CN 2009101350726 A CN2009101350726 A CN 2009101350726A CN 200910135072 A CN200910135072 A CN 200910135072A CN 101872172 B CN101872172 B CN 101872172B
- Authority
- CN
- China
- Prior art keywords
- input
- clock signal
- signal source
- scanning
- output pins
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Power Sources (AREA)
Abstract
The invention provides a sleep mode power saving method, a keyboard control circuit and a triangular scanning keyboard. The method is applicable to the triangular scanning keyboard control circuit. The triangular scanning keyboard control circuit comprises a plurality of input/output pins. The method comprises the following steps: providing a first clock signal source and a second clock signal source, wherein the frequency of the second clock signal source is much lower than the frequency of the first clock signal source; in the normal mode, orderly outputting a scan pulse to the input/output pins according to the frequency of the first clock signal source; and in the sleep mode, orderly outputting the scan pulse to the input/output pins according to the frequency of the second clock signal source, wherein when a specific input/output pin outputs scan pulse, the rest of input/output pins carry out detection.
Description
Technical field
The invention relates to a kind of technology of button control, further, the invention relates to a kind of sleep mode power saving method, keyboard control circuit and triangular scanning keyboard.
Background technology
Along with the progress of science and technology, electronic technology by the earliest vacuum tube, transistor, proceeds to IC chip.Its purposes very extensively, also therefore, electronic product also gradually become indispensable daily necessities in modern's life.Many article gradually by the electronization.Aim of electronization is nothing but to hope to let people use conveniently.
The control method of many electronic products is nothing more than using by key control, for example computer, mobile phone or the like.In general, the mode of the detection of keyboard button scanning is divided into two kinds with technology commonly used at present.First kind is matrix form scanning, and second kind is triangular scanning.Fig. 1 is the circuit diagram of matrix form keyboard scan of the prior art.Give an example with 5 * 5 keyboards at this, this circuit comprises 100,5 horizontal scanning line HS10～HS14 of a matrix form keyboard scan controller, 5 vertical scan line VS10～VS14.Matrix form keyboard scan controller 100 comprises 10 input and output pin I/O-10～I/O-19.
When beginning to detect keyboard button, input and output pin I/O-10～I/O-14 of controlling level sweep trace HS10～HS14 can be according to the pulse of order output scanning.Input and output pin I/O-15～I/O-19 of control vertical scan line VS10～VS14 detects.When the pulse of I/O-10 output scanning, and the user pressed the button 101 o'clock, horizontal scanning line HS10 can with vertical scan line VS13 short circuit, therefore, scanning impulse can be transfused to output pin I/O-18 and receive.Matrix form keyboard scan controller 100 can judge that just button 101 is pressed at this moment.
Fig. 2 is the circuit diagram of triangular scanning keyboard of the prior art.Please refer to Fig. 2, this circuit comprises 200,9 vertical scan line VS20～VS28 of a triangular scanning keyboard controller, 10 horizontal scanning line HS20～HS29.Triangular scanning keyboard controller 200 comprises 10 input and output pin I/O-20～I/O-29 equally.When beginning to detect keyboard button, input and output pin I/O-20～I/O-29 of controlling level sweep trace HS20～HS29 can be according to the pulse of order output scanning.More specifically, when one of them input and output pin I/O-20～I/O-29 output scanning pulse, other remaining input and output pin I/O-20～I/O-29 then detect.For instance, when the pulse of input and output pin I/O-20 output scanning, input and output pin I/O-21～I/O-29 then detects.Same, suppose the pulse of input and output pin I/O-21 output scanning, and button 201 is when being pressed, at this moment, vertical scan line VS21 can with horizontal scanning line HS24 short circuit.Therefore, scanning impulse can be transfused to output pin I/O-24 and receives.Triangular scanning keyboard controller 200 can judge that just button 201 is pressed.
Comparison diagram 1 and Fig. 2 just can know, are the KBC of 10 input and output pins equally, and 200 number of buttons that can control of the KBC of triangular scanning are 45, and 100 number of buttons that can control of matrix form keyboard scan controller are 25.In other words, because of integrated circuit (Integrated Circuit, input and output IC) (Input output, IO) resource is considered, hope to accomplish with less input and output resource more by key control, but the Keyboard Control head it off of triangular scanning.
The advantage of the keyboard of matrix form scanning is; When the keyboard of matrix form scanning gets into sleep pattern; Please refer to Fig. 1; Input and output pin I/O-10～I/O-14 can be set at logic high voltage, and input and output pin I/O-15～I/O-19 then is set to logic low-voltage, and utilizes the logic state of register record input and output pin I/O-15～I/O-19.When the user presses any one button; The logic high voltage of input and output pin I/O-10～I/O-14 can be sent to input and output pin I/O-15～I/O-19; Make the logic state of input and output pin I/O-15～I/O-19 change, thereby wake the keyboard of matrix form scanning up.Because the power consumption of this kind sleep pattern is extremely low, therefore be fit to be used in the system of low consumption electric current, for example telepilot or the like.
Yet; In general the required consumed current of the keyboard control chip of triangular scanning needs hundreds of uA to number mA at least, still can accept for high power consumption streaming system; But require only to count uA for sleep current such as picture telepilots; The keyboard control chip of triangular scanning is difficult to just accomplish that therefore, just difficulty person of being used or manufacturer accept the keyboard of triangular scanning.
Summary of the invention
A purpose of the present invention is to provide a kind of sleep mode power saving method; Be applicable to a triangular scanning keyboard control circuit; In order under the situation of input and output resource-constrained, accomplish morely by key control with less I O, and can reduce power consumption in sleep pattern.
Another object of the present invention is to provide a kind of triangular scanning keyboard and control circuit thereof that uses said method, so that this kind keyboard or its control circuit can be under sleep patterns, reduce power consumption.
In view of this; A purpose of the present invention is providing a kind of sleep mode power saving method exactly; Be applicable to a triangular scanning keyboard control circuit, wherein this triangular scanning keyboard control circuit comprises a plurality of input and output pins, and said method comprises the following steps: to provide one first signal source of clock; One second clock signal source is provided, and wherein the frequency of second clock signal source is far below the frequency of first signal source of clock; When a normal mode; Frequency according to first signal source of clock; In regular turn to the pulse of above-mentioned input and output pin output one scan, when wherein the specific input and output pin output scanning pulse of above-mentioned input and output pin, all the other input and output pins detect; And when sleep pattern; Frequency according to the second clock signal source; In regular turn to the pulse of above-mentioned input and output pin output scanning, when wherein the specific input and output pin output scanning pulse of above-mentioned input and output pin, all the other input and output pins detect.
According to the described sleep mode power saving method of preferred embodiment of the present invention; Wherein aforementioned triangular scanning keyboard control circuit also comprises one scan driver element and at least one mac function; And said method also comprises the following steps: when sleep pattern, stops the above-mentioned functions block and only keeps above-mentioned scan drive cell.In addition, when sleep pattern, above-mentioned input pin any one of them when detecting logic state and changing, start the mac function that is stopped, reply normal mode, the button that is pressed with detection.
The present invention proposes a kind of triangular scanning keyboard in addition, and this triangular scanning keyboard comprises the triangular scanning keyboard control circuit of the embodiment of the invention, a plurality of horizontal scanning line, a plurality of vertical scan line and a plurality of button.Said triangular scanning keyboard control circuit comprises a plurality of input and output pins, scan drive cell, first signal source of clock and second clock signal source, and wherein the frequency of second clock signal source is far below the frequency of first signal source of clock.Scan drive cell makes the pulse of above-mentioned input and output pin output one scan in order to drive above-mentioned input and output pin.Horizontal scanning line is corresponding couples above-mentioned input and output pin.A plurality of vertical scan lines are corresponding couples above-mentioned input and output pin; Wherein, Have at least a specific input and output pin not couple above-mentioned vertical scan line, wherein above-mentioned horizontal scanning line and vertical scan line intermesh, and each horizontal scanning line and each vertical scan line are opened a way mutually.Each button arrangement is in the staggered place of horizontal scanning line and vertical scan line, when a specific button that is disposed at a specified level sweep trace and a specific vertical scan line confluce is depressed, and above-mentioned specified level sweep trace and specific vertical scan line short circuit.
When the triangular scanning keyboard control circuit when a normal mode is operated; Frequency according to first signal source of clock; In regular turn to the pulse of above-mentioned input and output pin output one scan, when wherein the pin output scanning pulse of above-mentioned input and output pin, all the other input and output pins detect.When triangular scanning keyboard control circuit during at sleep mode operation; Frequency according to the second clock signal source; In regular turn to the pulse of above-mentioned input and output pin output scanning, when wherein the pin output scanning pulse of above-mentioned input and output pin, all the other input and output pins detect.
Also comprise at least one mac function according to the described triangular scanning keyboard control circuit of preferred embodiment of the present invention, wherein, when sleep pattern, the above-mentioned functions block is stopped.In addition, in preferred embodiment, the frequency of the clock signal of second clock signal source is lower than 10KHz.
Spirit of the present invention is when being to use the control circuit of triangular scanning keyboard, has two kinds of clock signal of system sources in the circuit itself, and a kind of is higher-frequency, and for example the clock source of MHz grade applies to normal manipulation mode; Another kind is the signal source of clock of KHz grade, applies to sleep (low speed, power saving) pattern.When the control circuit of triangular scanning keyboard is carried out sleep (low speed; Power saving) during pattern except input and output pin partly the circuit; The inner mac function of other control circuits all gets into sleep pattern; Then constantly with the clock signal of low frequency, for example the frequency of KHz grade is carried out keyboard scan to above-mentioned input and output pin.When the state of input and output pin changes, just wake microprocessor and other mac function up, microprocessor goes to check the button that action takes place again, carries out follow-up functional operation again.
Description of drawings
Fig. 1 is the circuit diagram of matrix form keyboard scan of the prior art;
Fig. 2 is the circuit diagram of triangular scanning keyboard of the prior art;
Fig. 3 is the circuit block diagram of the triangular scanning keyboard of the embodiment of the invention;
Fig. 4 A is the process flow diagram of the sleep mode power saving method of the embodiment of the invention;
Fig. 4 B is the process flow diagram of the sleep mode power saving method of the embodiment of the invention;
Fig. 5 is the circuit block diagram of the triangular scanning keyboard of the embodiment of the invention.
Drawing reference numeral
100: matrix form keyboard scan controller
HS10～HS14: the horizontal scanning line of matrix form keyboard scan
VS10～VS14: the vertical scan line of matrix form keyboard scan
I/O-10～I/O-19, I/O-20～I/O-29, I/O-30～I/O-39, IO-50～IO-59: input and output pin
101,201,301: button
200: the triangular scanning keyboard controller
HS20～HS29, HS30～HS39: the horizontal scanning line of triangular scanning keyboard
VS20～VS28, VS30～VS38: the vertical scan line of triangular scanning keyboard
300,500: the triangular scanning keyboard controller of the embodiment of the invention
CLK1: first signal source of clock
CLK2: second clock signal source
302,501: mac function
303,503: scan drive cell
S401～S407: the step of the embodiment of the invention
502: diode
SA400～SA407, SB400～SB407: each step of the embodiment of the invention
Embodiment
For let above-mentioned and other purposes of the present invention, feature and advantage can be more obviously understandable, hereinafter is special lifts preferred embodiment, and conjunction with figs., elaborates as follows.
Fig. 3 is the circuit block diagram of the triangular scanning keyboard of the embodiment of the invention.Please refer to Fig. 3; This triangular scanning keyboard comprises triangular scanning keyboard controller 300 and a plurality of button 301 of 9 vertical scan line VS30～VS38,10 horizontal scanning line HS30～HS39, the embodiment of the invention; Wherein, above-mentioned triangular scanning keyboard controller 300 comprises 10 input and output pin I/O-30～I/O-39, a mac function 302, one scan driver element 303, the first signal source of clock CLK1 and second clock signal source CLK2.In this embodiment, the first signal source of clock CLK1 and second clock signal source CLK2 all offer scan drive cell 303 clock signals.303 of scan drive cells are in order to drive the pulse that input and output pin I/O-30～I/O-39 is exported.
The first signal source of clock CLK1 and second clock signal source CLK2 are respectively under different mode, in order to determine the frequency of the pulse that each input and output pin I/O-30～I/O-39 is exported.More specifically, the frequency of the clock signal exported far below the first signal source of clock CLK1 of the frequency of the clock signal exported of second clock signal source CLK2.The first signal source of clock CLK1 is in order to the needed clock signal of supply normal mode.Second clock signal source CLK2 is in order to the needed clock signal of supply sleep pattern.In general, the frequency of the clock signal that the first signal source of clock CLK1 is exported is the MHz grade, and the frequency of the clock signal that second clock signal source CLK1 is exported is the KHz grade.
When normal mode is operated; The clock signal that 300 meetings of triangular scanning keyboard controller are exported according to the first signal source of clock CLK1; The pulse of the one scan of control input and output pin I/O-30 output earlier; At this moment, remaining input and output pin I/O-31～I/O-39 then carries out the button on the detection of vertical sweep trace VS30.Next; The clock signal that 300 meetings of triangular scanning keyboard controller are exported according to the first signal source of clock CLK1; The pulse of control input and output pin I/O-31 output one scan, at this moment, remaining input and output pin I/O-32～I/O-39 then carries out the button on the detection of vertical sweep trace VS31.Below operation can be by that analogy.Briefly, when one of them input and output pin I/O-30～I/O-39 output scanning pulse, other remaining input and output pin I/O-30～I/O-39 then carry out button and detect.For instance, suppose the pulse of input and output pin I/O-31 output scanning, and button 301 is when being pressed, at this moment, vertical scan line VS31 can with horizontal scanning line HS34 short circuit.Therefore, scanning impulse can be transfused to output pin I/O-34 and receives.Triangular scanning keyboard controller 300 can judge that just button 301 is pressed, and this moment, mac function 302 just can be carried out corresponding action according to the button of being pressed.
When user's a period of time did not operate keyboard, 300 of triangular scanning keyboard controllers can begin to get into sleep pattern.When getting into sleep mode operation, triangular scanning keyboard controller 300 is understood the function of hold function blocks 302, and replaces the first signal source of clock CLK1 with second clock signal source CLK2.303 of scan drive cells are to according to the clock signal of second clock signal source CLK2 to drive input and output pin I/O-30～I/O-39 output scanning pulse.Owing to do not have pressing keys, so the state of each input and output pin I/O-30～I/O-39 should maintain logic low-voltage.Because mac function 302 is stopped effect, therefore, though the scanning of button is still proceeded, also can't judge that which button is depressed this moment.
For instance, suppose the pulse of input and output pin I/O-31 output scanning, and button 301 is when being pressed, at this moment, vertical scan line VS31 can with horizontal scanning line HS34 short circuit.Therefore, scanning impulse can be transfused to output pin I/O-34 and receives.Input and output pin I/O-34 receives after the logic high voltage of scanning impulse; Then triangular scanning keyboard controller 300 can be waken up; Change normal mode into, just mac function 302 can be activated, and the first signal source of clock CLK1 replaces second clock signal source CLK2 again.At this moment, just the frequency by the first signal source of clock CLK1 is a benchmark, scans again, judges the button of being depressed 301.
Because the foregoing description uses second clock signal source CLK2 in sleep pattern; In general this second clock signal source CLK2 is the clock that is lower than 10KHz; Preferable situation is the clock with the KHz grade, and sleep pattern closed mac function 302, therefore; Lowered dynamic power consumption, also can the current drain of triangular scanning keyboard controller 300 in sleep pattern be reduced to below several uA.
In addition, above-mentioned situation is a situation about not being depressed for a long time at button, and also having a kind of situation in addition is that button is depressed for a long time, and for example telepilot is not realized under being crushed on hip.This kind situation, what will cause that telepilot continues transmits, in the course of time, then can power consumption totally.And general KBC is not also for this kind demand design battery saving mode.Yet, utilize the above embodiment of the present invention, can accomplish power saving equally.Situation about below just being depressed with button 301 explains how the present invention gets into sleep pattern and save electric power, causes power consumption totally with the function of the execution press push button 301 avoiding continuing.
At first, surpass a schedule time when the time that button 301 is depressed, triangular scanning keyboard controller 300 gets into sleep pattern.Same, only keeping the state that scan drive cell 303 is runnings this moment, 302 of other mac function are closing state.Same, this moment, scan drive cell 303 was that clock signal according to second clock signal source CLK2 is to drive input and output pin I/O-30～I/O-39 output scanning pulse.Because button 301 is depressed; Triangular scanning keyboard controller 300 only need judge in sleep pattern whether button is decontroled; Therefore the frequency of second clock signal source CLK2 does not just need like above-mentioned embodiment; Use the clock of KHz grade, only need use the clock signal that is lower than the 100Hz grade, preferable situation is the clock signal with the Hz grade.With this example, when triangular scanning keyboard controller 300 only need be judged when the pulse of input and output pin I/O-31 output scanning in sleep pattern, whether input and output pin I/O-34 received logic low-voltage.If during the pulse of input and output pin I/O-31 output scanning, input and output pin I/O-34 receives logic low-voltage, represent that then button 301 is decontroled, then get back to normal mode.If during the pulse of input and output pin I/O-31 output scanning, input and output pin I/O-34 still receives logic high voltage, representes that then button 301 is still pushed down, and then keeps sleep pattern.
By the foregoing description, the present invention proposes a kind of sleep mode power saving method in addition.The method is applicable to the triangular scanning keyboard control circuit.Fig. 4 A is the process flow diagram of the sleep mode power saving method of the embodiment of the invention.Please refer to Fig. 4 A, the method is to be used in the method for all buttons when a period of time all is not depressed.The step of the method is following:
Step SA400: this electricity saving method begins.
Step SA401: one first signal source of clock is provided.
Step SA402: a second clock signal source is provided, and wherein the frequency of this second clock signal source is far below the frequency of first signal source of clock.
Step SA403: get into normal mode.According to the frequency of first signal source of clock, in regular turn to the pulse of above-mentioned a plurality of input and output pin output scanning, when wherein the specific input and output pin output scanning pulse of above-mentioned input and output pin, all the other input and output pins detect.
Step SA404: judge in the schedule time whether do not have button to be depressed.If there is button to be depressed, then carry out step SA405.If do not have button to be depressed, carry out step SA406.
Step SA405: keep normal mode.
Step SA406: get into sleep pattern; Frequency according to the second clock signal source; In regular turn to the pulse of above-mentioned a plurality of input and output pin output scanning, when wherein the specific input and output pin output scanning pulse of above-mentioned input and output pin, all the other input and output pins detect.
Whether step SA407: judging has button to be depressed.If there is button to be depressed, get back to step SA403, if there is not button to be depressed, then get back to step SA406, keep sleep pattern.
Fig. 4 B is the process flow diagram of the sleep mode power saving method of the embodiment of the invention.Please refer to Fig. 4 B, the method is to be used in the situation that button was all pressed in a period of time always.The step of the method is following:
Step SB400: this electricity saving method begins.
Step SB401: one first signal source of clock is provided.
Step SB402: a second clock signal source is provided, and wherein the frequency of this second clock signal source is far below the frequency of first signal source of clock.
Step SB403: get into normal mode.According to the frequency of first signal source of clock, in regular turn to the pulse of above-mentioned a plurality of input and output pin output scanning, when wherein the specific input and output pin output scanning pulse of above-mentioned input and output pin, all the other input and output pins detect.
Step SB404: judge whether same button is pressed above one period schedule time.When being judged as not, then get into step SB405.Be then to get into step SB406 when being judged as.
Step SB405: keep normal mode.
Step SB406: get into sleep pattern.
Step SB407: judge whether button is decontroled.If the above-mentioned button that is depressed is decontroled (be judged to be and be), get back to step SB403, get back to normal mode.If the above-mentioned button that is depressed continues to be depressed (being judged to be not), then get back to step SB406, keep sleep pattern.
In addition, though the foregoing description only provides the circuit of triangular scanning keyboard as shown in Figure 3, it will be appreciated by those skilled in the art that so foregoing circuit is the circuit of semi-matrix form, Fig. 5 is the circuit block diagram of the triangular scanning keyboard of the embodiment of the invention.Please refer to Fig. 5, this circuit is the circuit of the triangular scanning keyboard of complete matrix kenel.This triangular scanning keyboard control circuit 500 extraly comprises a plurality of diodes 502 except comprising original mac function 501, scan drive cell 503, a plurality of input and output pin IO-50～IO59, the first signal source of clock CLK1 and second clock signal source CLK2.Because this control method communicates with the circuit theory of triangular scanning keyboard shown in Figure 3, so do not repeat them here.
In sum, spirit of the present invention is when being to use the control circuit of triangular scanning keyboard, has two kinds of clock signal of system sources in the circuit itself, and a kind of is higher-frequency, and for example the clock source of MHz grade applies to normal manipulation mode; Another kind is the signal source of clock of Hz grade, applies to sleep (low speed, power saving) pattern.When the control circuit of triangular scanning keyboard is carried out sleep (low speed; Power saving) during pattern except input and output pin partly the circuit; The inner mac function of other control circuits all gets into sleep pattern; Then constantly with the clock signal of low frequency, for example the frequency of KHz grade or the frequency of Hz grade are carried out keyboard scan to above-mentioned input and output pin.When the state of input and output pin changes, just wake microprocessor and other mac function up, microprocessor goes to check the button that action takes place again, carries out follow-up functional operation again.
The specific embodiment that in the detailed description of preferred embodiment, is proposed is only in order to convenient explanation technology contents of the present invention; But not with narrow sense of the present invention be limited to the foregoing description; In the situation that does not exceed spirit of the present invention and above claims scope; The many variations of being done is implemented, and all belongs to scope of the present invention.Therefore claims of before looking, attaching of protection scope of the present invention define and are as the criterion.
Claims (13)
1. a sleep mode power saving method is characterized in that, said method is applicable to a triangular scanning keyboard control circuit, and wherein said triangular scanning keyboard control circuit comprises a plurality of input and output pins, and said method comprises:
One first signal source of clock is provided;
One second clock signal source is provided, and the frequency of wherein said second clock signal source is far below the frequency of said first signal source of clock;
When a normal mode; Frequency according to said first signal source of clock; In regular turn to said these input and output pin output one scan pulses; When said these input and output pins specific input and output pin was wherein exported said scanning impulse, all the other said these input and output pins detected; And
When a sleep pattern; Frequency according to said second clock signal source; In regular turn said these input and output pins are exported said scanning impulse; When said these input and output pins specific input and output pin was wherein exported said scanning impulse, all the other said these input and output pins detected.
2. sleep mode power saving method as claimed in claim 1; It is characterized in that; Said triangular scanning keyboard control circuit also comprises one scan driver element and at least one mac function; Wherein said scan drive cell make said these input and output pins export said scanning impulse, and said method also comprises in order to drive said these input and output pins:
When said sleep pattern, stop said these mac function, only keeping said scan drive cell is operating state.
3. sleep mode power saving method as claimed in claim 2 is characterized in that, said method also comprises:
When said sleep pattern, said these input and output pins any one of them when detecting logic state and changing, start said these mac function that are stopped, reply normal mode.
4. sleep mode power saving method as claimed in claim 1 is characterized in that, when said normal mode, said method also comprises:
Whether a period of time is not depressed to judge button; And
Be then to get into sleep pattern when above-mentioned steps is judged as.
5. sleep mode power saving method as claimed in claim 1 is characterized in that, when said normal mode, said method also comprises:
Whether lasting a period of time is depressed always to judge button; And
Be then to get into sleep pattern when above-mentioned steps is judged as.
6. a triangular scanning keyboard control circuit is characterized in that, said control circuit comprises:
A plurality of input and output pins;
The one scan driver element in order to drive said these input and output pins, makes said these input and output pin output one scan pulses;
One first signal source of clock provides said scan drive cell one first clock signal; And
One second clock signal source provides said scan drive cell one second clock signal, and the frequency of wherein said second clock signal is far below the frequency of said first clock signal;
Wherein, When said triangular scanning keyboard control circuit when a normal mode is operated; According to the frequency of said first signal source of clock, in regular turn said these input and output pins are exported said scanning impulse, when said these input and output pins specific input and output pin is wherein exported said scanning impulse; All the other said these input and output pins detect
When said triangular scanning keyboard control circuit during at said sleep mode operation; Frequency according to said second clock signal source; In regular turn said these input and output pins are exported said scanning impulse; When said these input and output pins specific input and output pin was wherein exported said scanning impulse, all the other said these input and output pins detected.
7. triangular scanning keyboard control circuit as claimed in claim 6 is characterized in that, said control circuit also comprises:
At least one mac function wherein, when said sleep pattern, stops said these mac function.
8. triangular scanning keyboard control circuit as claimed in claim 6 is characterized in that, is not depressed when button a period of time, then gets into sleep pattern, and the frequency of the clock signal of said second clock signal source is lower than 10KHz at this moment.
9. triangular scanning keyboard control circuit as claimed in claim 6 is characterized in that, when lasting a period of time of button is depressed always, then gets into sleep pattern, and the frequency of the clock signal of said second clock signal source is lower than 10Hz at this moment.
10. a triangular scanning keyboard is characterized in that, said keyboard comprises:
A plurality of horizontal scanning lines couple a plurality of input and output pins accordingly;
A plurality of vertical scan lines; Couple a plurality of input and output pins accordingly; Have at least a specific input and output pin not couple said these vertical scan lines; Wherein said these horizontal scanning lines and said these vertical scan lines intermesh, and each horizontal scanning line and each vertical scan line are opened a way mutually;
A plurality of buttons; Each said these button arrangement is in the staggered place of said these horizontal scanning lines and said these vertical scan lines; When a specific button that is disposed at a specified level sweep trace and a specific vertical scan line staggered place is depressed, said specified level sweep trace and said specific vertical scan line short circuit;
One triangular scanning keyboard control circuit comprises:
A plurality of input and output pins;
The one scan driver element in order to drive said these input and output pins, makes said these input and output pin output one scan pulses;
One first signal source of clock provides said scan drive cell one first clock signal; And
One second clock signal source provides said scan drive cell one second clock signal, and the frequency of wherein said second clock signal is far below the frequency of said first clock signal;
Wherein, When said triangular scanning keyboard control circuit when a normal mode is operated; Frequency according to said first signal source of clock; In regular turn said these input and output pins are exported said scanning impulse, when said these input and output pins pin was wherein exported said scanning impulse, all the other said these input and output pins detected;
When said triangular scanning keyboard control circuit during at said sleep mode operation; Frequency according to said second clock signal source; In regular turn said these input and output pins are exported said scanning impulse; When said these input and output pins pin was wherein exported said scanning impulse, all the other said these input and output pins detected.
11. triangular scanning keyboard as claimed in claim 10 is characterized in that, said keyboard also comprises:
At least one mac function wherein, when said sleep pattern, stops said these mac function.
12. triangular scanning keyboard as claimed in claim 10 is characterized in that, is not depressed when button a period of time, then gets into sleep pattern, the frequency of the clock signal of said second clock signal source is lower than 10KHz at this moment.
13. triangular scanning keyboard as claimed in claim 10 is characterized in that, when lasting a period of time of button is depressed, then gets into sleep pattern always, the frequency of the clock signal of said second clock signal source is lower than 10Hz at this moment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101350726A CN101872172B (en) | 2009-04-22 | 2009-04-22 | Sleep mode power saving method, keyboard control circuit and triangular scanning keyboard |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101350726A CN101872172B (en) | 2009-04-22 | 2009-04-22 | Sleep mode power saving method, keyboard control circuit and triangular scanning keyboard |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101872172A CN101872172A (en) | 2010-10-27 |
| CN101872172B true CN101872172B (en) | 2012-05-30 |
Family
ID=42997092
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009101350726A Active CN101872172B (en) | 2009-04-22 | 2009-04-22 | Sleep mode power saving method, keyboard control circuit and triangular scanning keyboard |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101872172B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105471438A (en) * | 2015-11-26 | 2016-04-06 | 江苏惠通集团有限责任公司 | Processing method, device and system of key clamping stagnation |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103257716B (en) * | 2013-05-14 | 2015-11-18 | 湖南工业大学 | A kind of low-power consumption keyboard and Scan orientation method thereof |
| CN110806816A (en) * | 2019-10-30 | 2020-02-18 | 深圳市汇顶科技股份有限公司 | Touch detection method, MCU, touch control equipment and storage medium |
| CN111600591A (en) * | 2020-07-27 | 2020-08-28 | 北京维普无限智能技术有限公司 | Key identification method and system of matrix keyboard |
| CN117348689A (en) * | 2022-06-27 | 2024-01-05 | 华为技术有限公司 | Clock calibration method, electronic device, and computer-readable storage medium |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4266278A (en) * | 1977-03-30 | 1981-05-05 | Citizen Watch Co., Ltd. | Portable electronic device equipped with calculation and timekeeping functions |
-
2009
- 2009-04-22 CN CN2009101350726A patent/CN101872172B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4266278A (en) * | 1977-03-30 | 1981-05-05 | Citizen Watch Co., Ltd. | Portable electronic device equipped with calculation and timekeeping functions |
Non-Patent Citations (3)
| Title |
|---|
| JP特开2003-208175A 2003.07.25 |
| JP特开平7-13671A 1995.01.17 |
| 张超 等.测速PDA的设计.《2005年全国单片机与嵌入式系统学术交流会论文集》.2005,第397-400页. * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105471438A (en) * | 2015-11-26 | 2016-04-06 | 江苏惠通集团有限责任公司 | Processing method, device and system of key clamping stagnation |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101872172A (en) | 2010-10-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101872172B (en) | Sleep mode power saving method, keyboard control circuit and triangular scanning keyboard | |
| CN101702106B (en) | Awakening method and system for touch screen terminal | |
| US9565293B2 (en) | Method and device for operating mobile terminal based on sensor, and mobile terminal | |
| US8533511B2 (en) | Notebook computer | |
| CN101598986B (en) | Touch detection device capable of saving power source consumption | |
| US20090289908A1 (en) | Touch detecting device capable of saving electricity | |
| CN101807106A (en) | Standby circuit of handheld device and awaken method thereof | |
| CN102148947B (en) | Standby wake-up circuit of electronic device | |
| TWI417710B (en) | Computer system for saving power consumption of a stand-by/power-off state and method thereof | |
| US20130222295A1 (en) | Mobile terminal to operate based on touch input, and operating method thereof | |
| TWI383293B (en) | Power saving method in sleep mode and keyboard controller using the same | |
| CN102495684A (en) | Remote control device and control method for same | |
| CN108806226A (en) | A kind of low power consumption method and remote controler applied to touch remote controller | |
| CN109388225A (en) | Key triggers energy-saving control method, storage medium, control device and its terminal | |
| TWI533118B (en) | Ultra low power wake-up circuit device | |
| CN109683735A (en) | A kind of touch screen wake-up circuit, method and electronic lock | |
| CN110703896B (en) | Normally open circuit for low-power SOC chip | |
| CN103391103B (en) | Ultralow power consumption wake-up circuit device | |
| CN102761169B (en) | Power supply control device and electronic device | |
| CN108700927A (en) | For reducing the power supplier and method of the stand-by electric of electronic equipment | |
| CN109672437A (en) | A kind of optical axis keyboard | |
| CN102156417A (en) | Startup/shutoff control system and starting/shutoff control method | |
| CN107844211A (en) | Touch electronic device, touch processing device and touch processing method thereof | |
| CN210225378U (en) | Circuit for preventing electronic product from false triggering | |
| CN105589501A (en) | Energy-saving control chip and control system thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |