CN203851121U - Key - Google Patents
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- CN203851121U CN203851121U CN201420236479.4U CN201420236479U CN203851121U CN 203851121 U CN203851121 U CN 203851121U CN 201420236479 U CN201420236479 U CN 201420236479U CN 203851121 U CN203851121 U CN 203851121U
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- signal acquisition
- button
- photodiode
- light
- key
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- 230000007797 corrosion Effects 0.000 abstract description 4
- 238000005260 corrosion Methods 0.000 abstract description 4
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- 238000006243 chemical reaction Methods 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 239000006096 absorbing agent Substances 0.000 description 1
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Abstract
The utility model provides a key and a keyboard which uses the key. The key comprises a key body which generates a selection signal under the influence of the outside world and automatically returns to a normal signal after the influence of the outside world is removed, and a signal acquisition circuit which detects the selection signal and the normal signal. The key body is a photosensitive element. The signal acquisition circuit is a circuit which detects the resistance change of the photosensitive element. The key provided by the utility model has the advantages that the limit of service life is prevented; the key can be used in an environment with water on the surface; and the key is prevented from the corrosion and the damage of oil stains.
Description
Technical field
The utility model relates to a kind of button and art of keypads.
Background technology
Key (Key) is exactly a kind of switch, generally has two states, and a kind of is its normality, original state namely, and another kind is selection mode, leaves exactly a unsure state after normality under ectocine, when ectocine stops, gets back to again normality.Keyboard is the set of button, as a kind of conventional input equipment, keyboard to press key class different and different, current keyboard has multiple, for example now widely used mechanical keyboard is exactly the keyboard that adopts mechanical compression formula key, it is that the state that detects button by checkout gear is pressed or the mode of unclamping is inputted, when pressing certain button downwards with finger or alternate manner, the circuit that gathers this key-press status produces the signal of this key-press status of reflection, when unclamping, this button resets, the circuit that gathers this key-press status will collect the information of this button reset, the main frame that uses this keyboard gathers the signal that the circuit of key-press status produces and is confirmed whether that in this keyboard, whether button is selected by receiving.Also have in addition a lot of keyboards such as diaphragm type, condenser type.No matter which kind of button, in some particular application, has its intrinsic deficiency, as:
Mechanical type, waterproof and dustproof, oil-stain-preventing newly can be poor, and the life-span is restricted.
Thin pattern, the life-span is poor, is easy to corrosion in oil pollution environment.
Condenser type, has in the environment of water on surface, can not work.
The weak point of three kinds of buttons that more than exemplify, has limited their scope of application, and such as easily touching in water or high oil pollution environment at washing machine, lampblack absorber, water heater, dishwasher etc., above button can not be used.
Button has generally comprised key body at present, this key body itself has two kinds of different states, a kind of normality, if the normality of mechanical key is to be added to the state above it without any external force, represent not selected, another is exactly selection mode, now by finger or alternate manner, press this key, make it touch switch below, switch ends is connected, signal acquisition circuit collects the status signal of this button of this State-output in selecting, when unclamping this button, this button self spring or the effect of other resetting means under switch below departing from, the connection at cut-off switch two ends, signal acquisition circuit collects this state, to main frame, send this button and there is no selecteed signal, the function of realization to button itself.
Summary of the invention
The deficiency that the utility model is used for current keyboard, provides a kind of button of light-sensitive element and keyboard being comprised of this button of having adopted.
The utility model is to realize the technical scheme that its technical purpose adopts to be: a kind of button, be included under ectocine the key body that produces the signal that automatically returns to normal after selecting signal and removing ectocine, detect the signal acquisition circuit of selecting signal and normality signal; Described key body is light-sensitive element, and described signal acquisition circuit is for detecting the circuit of described light-sensitive element resistance variations.
Further, in above-mentioned button: described light-sensitive element is photodiode, described signal acquisition circuit comprises the divider resistance of connecting with described photodiode, described photodiode and the signal acquisition point of the photodiode resistance variations described in the reflection between divider resistance.
Further, in above-mentioned button: positive voltage from the anode of described photodiode to negative electrode through described divider resistance ground connection.
Further, in above-mentioned button: positive voltage is linked into the anode of described photodiode, the minus earth of photodiode from the divider resistance by described.
Further, in above-mentioned button: the ADC module that is connected with the voltage digital of described signal acquisition point in described signal acquisition point.
Further, in above-mentioned button: also comprised the amplifying circuit of described signal acquisition point voltage amplification before described signal acquisition point is connected to described ADC module.
Further, in above-mentioned button: be also provided with analog switch before the signal acquisition point of stating is connected to described amplifying circuit.
Further, in above-mentioned button: be also provided with analog switch before described signal acquisition point is connected to described ADC module.
Further, in above-mentioned button: described light-sensitive element is phototriode or photo resistance.
A kind of keyboard is also provided in the utility model, in this keyboard, includes arbitrary described button above.
Further, in above-mentioned keyboard: be also provided with the lighting device throwing light on to strong; Described lighting device is light-emitting diode.
The utility model provides a kind of novel button and keyboard, key position is a light-sensitive element, when finger or other object contacts are during at key position, by the extraneous light sheltering from herein, or send infrared light, there is variation in luminous environment herein namely.Utilize light-sensitive element, the variation of outside luminous environment is detected, and then judge the action whether this position has button to touch.
The variation of button luminous environment of living in, can cause the variation of light-sensitive element resistance or electric current, utilizes a kind of signal acquisition circuit, gathers the situation of change of light-sensitive device, and then whether judgement has button touch action herein.
The beneficial effects of the utility model are:
Use be common, light-sensitive device is as optical sensor cheaply, product price is cheap, generally promote in applicable market;
Hardware designs and production technology are simple, and simple several electronic devices and components, without extra light emitting devices;
With respect to film key, mechanical key, electric capacity press key lamp, this patent can be used in there is the environment of water on surface, has overcome greasy dirt to the corrosion of button to damage waterproof, oil-stain-preventing, life-span long.
Accompanying drawing explanation
Fig. 1 is the utility model button schematic diagram (1).
Fig. 2 is the utility model button schematic diagram (2).
Fig. 3 is the utility model embodiment 1 button connection layout.
Fig. 4 is the utility model embodiment 2 button connection layouts.
Fig. 5 is the utility model embodiment 3 button connection layouts.
Fig. 6 is the utility model embodiment 4 button connection layouts.
Fig. 7 is the utility model embodiment 5 button connection layouts.
Fig. 8 is the utility model embodiment 6 button connection layouts.
Fig. 9 is the utility model embodiment 7 button connection layouts.
Figure 10 is the utility model embodiment 8 button connection layouts.
Figure 11 is the utility model embodiment 9 button connection layouts.
Figure 12 is the utility model embodiment 10 button connection layouts.
Figure 13 is the utility model embodiment 11 keyboard schematic diagrams.
Embodiment
As shown in Figure 1, in the utility model, light-sensitive device 1 and divider resistance 2 are applied to voltage VCC.When exterior light environment is constant, the electric current that flows through light-sensitive device 1 can not change yet, and the voltage of photosensor signal collection point 3 can not change yet.When exterior light environment changes, the electric current that flows through light-sensitive device 1 can change thereupon, and then the voltage of signal acquisition point 3 also can change.The voltage of signals collecting and 4 pairs of signal acquisition point 3 for the treatment of circuit gathers and processes, and according to the situation of change of this point voltage, judges the touch action whether light-sensitive element 1 place has exterior object.
Light-sensitive device in Fig. 1 is depicted as photodiode, but according to the characteristic of light-sensitive device, there is light resistance when unglazed different, other light-sensitive element can replace photodiode as photo resistance, phototriode etc., and signals collecting and treatment circuit can be comparator circuit, signal amplification circuit, ADC Acquisition Circuit or cpu circuit.
For the more intense light-sensitive device of some sensitivity, without signal, amplify, can directly send into analog to digital converter (ADC) and carry out data acquisition and processing (DAP).
When luminous environment changes, for example illuminance strengthens and causes that photo resistance reduces, signal acquisition point 3 voltages between photodiode 1 and divider resistance 2 raise, otherwise illuminance weakens and causes that D1 resistance increases, and causes signal acquisition point 3 lower voltages between photodiode 1 and divider resistance 2.
When exterior light environment slowly changes, the variation of the signal acquisition point 3 between photodiode 1 and divider resistance 2 is also to change slowly.For this, change slowly, CPU is judged as without actuation of keys.
When exterior light environment sharply changes, for example ON/OFF lamp in room action, although be now that luminous environment sharply changes, this variation acts on all buttons simultaneously, now, CPU is also judged as without actuation of keys.When finger is pressed on some photosensitive buttons, only have the luminous environment at this button place to change, the luminous environment at other button places is constant.Now, judge that there is touch action at this button place.
In situation for outside complete darkness, lightening LED lamp, for the touch action of external touch body provides light source.If be now finger touch, also receive the infrared light that finger is launched simultaneously.
Now, if outside does not have object, the light of LED lamp just can not reflect, and the voltage of the signal acquisition point 3 between photodiode 1 and divider resistance 2 just keeps constant, and CPU also just judges that button does not have touch action for this reason.
If now have object near light-sensitive device, the light that LED can be launched reflects back on light-sensitive device, and the voltage of the signal acquisition point 3 between photodiode 1 and divider resistance 2 raises, and CPU, according to the degree raising, has judged whether button touch action.
Present embodiment also comprises a kind of keyboard, comprise one group of schematic diagram button as depicted in figs. 1 and 2, as shown in Figure 1, comprise a photodiode 1, the signal acquisition circuit that detects key-press status is a divider resistance 2 being connected between photodiode 1 negative electrode and ground, the anode of photodiode connects high voltage, now, if have extraneous factor to cover, be not irradiated to the light on photodiode 1, the resistance of photodiode 1 is less, flowing through photodiode 1 will be larger with the electric current in divider resistance 2, the signal acquisition point between photodiode 1 and divider resistance 23 is exported higher voltage, now represent that button is in the normal state.
If have finger or other thing to cover the light being irradiated on photodiode 1, the resistance of photodiode 1 is larger, flowing through photodiode 1 will be less with the electric current in divider resistance 2, the lower voltage of 3 output of the signal acquisition point between photodiode 1 and divider resistance 2, represents that button is in selection mode.After covering the object of photodiode 1 glazed thread and removing, the higher voltage of signal acquisition point 3 output between photodiode 1 and divider resistance 2, returns to normal.
Equally, as shown in Figure 2, if have extraneous factor to cover, be not irradiated to the light on photodiode 1, the resistance of photodiode 1 is less, flowing through photodiode 1 will be larger with the electric current in divider resistance 2, divider resistance 2 dividing potential drops are more, and the lower voltage of 3 output of the signal acquisition point between photodiode 1 and divider resistance 2, now represents that button is in the normal state.
If have finger or other thing to cover the light being irradiated on photodiode 1, the resistance of photodiode 1 is larger, flowing through photodiode 1 will be less with the electric current in divider resistance 2, the voltage that divider resistance 2 is divided is less, the higher voltage of signal acquisition point 3 output between photodiode 1 and divider resistance 2, represents that button is in selection mode.
Fig. 2 is on the basis of Fig. 1, light-sensitive device D1 and resistance R 1 have been changed to a upper/lower positions, in this case, just made the polarity of signal intensity that variation has occurred, CPU has judged whether button touch action, also as long as signal original " rise/fall " is changed into " decline/rise ".Fig. 3 below, 5,7,9,11 is also the same with Fig. 4,6,8,10,12.
Embodiment 1 as shown in Figure 3, adopts bleeder circuit schematic diagram as shown in Figure 1, has independent ADC device in CPU outside, and the voltage digital of the signal acquisition point 3 between photodiode 1 and divider resistance 2 is input in CPU, by CPU, is judged.
Embodiment 2 as shown in Figure 4, with the difference of embodiment 1 be to have adopted voltage divider principle figure as shown in Figure 2.
Embodiment 3 and embodiment 4 are as shown in Figure 5 and Figure 6, for increase sensitivity before ADC to the voltage of the signal acquisition point 3 between photodiode 1 and divider resistance 2 is amplified, increased an amplifier, shown in figure, be operational amplifier OP1, be understandable that, this amplifier can be also triode or metal-oxide-semiconductor.
As shown in Figure 7 and Figure 8, CPU is built-in with analog switch SW and ADC simultaneously for embodiment 5 and embodiment 6, and wherein, analog switch SW effect is a plurality of light sensors to be switched to ADC in turn carry out digital-to-analogue conversion.
Embodiment 7 and embodiment 8 are as shown in Figure 9 and Figure 10, the same with embodiment 6 with embodiment 5 above, and difference is that CPU only has built-in ADC, external simulation interrupteur SW.The analog switch SW effect equally is here a plurality of light sensors to be switched to ADC in turn carry out digital-to-analogue conversion.
Embodiment 9 and embodiment 10 are as shown in FIG. 11 and 12, similar with embodiment 7 and embodiment 8 above, just, between analog switch SW and ADC, add amplifier OP1.
As shown in figure 13, the keyboard of the present embodiment includes by light-sensitive device D1, D2 embodiment 11 ... Dn adds the key body that peripheral circuit forms, and is also provided with light-emitting diode L1, a L2.....LnD button is thrown light on each button.Here the effect that adds light-emitting diode L1, L2.....Ln: in the situation that externally light is very dark, these LED provide light source for its corresponding light-sensitive device.For example do not turn on light night in situation, CPU, according to detecting needs, lights corresponding LED, judges whether photo resistance place has reflection of light, and then has judged whether touch action.
What the utility model was used is common, light-sensitive device is as optical sensor cheaply, product price is cheap, generally promote in applicable market, hardware designs and production technology are simple, simple several electronic devices and components, with respect to film key, mechanical key, electric capacity button etc., can in having the environment of water, surface use, overcome greasy dirt to the corrosion of button so that damaged waterproof, oil-stain-preventing, life-span is long, this programme by be outside natural daylight, light or inner LED light, spectrum all within 400nm-1100nm, but not infrared light only, and light emitting devices especially.
Claims (10)
1. a button, is included in the key body that produces the signal that automatically returns to normal after selecting signal and removing ectocine under ectocine, detects the signal acquisition circuit of selecting signal and normality signal; It is characterized in that: described key body is light-sensitive element, described signal acquisition circuit is for detecting the circuit of described light-sensitive element resistance variations.
2. button according to claim 1, it is characterized in that: described light-sensitive element is photodiode (1), described signal acquisition circuit comprises the divider resistance (2) of connecting with described photodiode (1), the signal acquisition point (3) of photodiode (1) resistance variations described in the reflection between described photodiode (1) and divider resistance (2).
3. button according to claim 2, is characterized in that: positive voltage from the anode of described photodiode (1) to negative electrode through described divider resistance (2) ground connection.
4. button according to claim 2, is characterized in that: positive voltage is linked into the anode of described photodiode (1), the minus earth of photodiode (1) from the divider resistance by described (2).
5. according to arbitrary described button in claim 2 to 4, it is characterized in that: in described signal acquisition point (3), be connected with the ADC module of the voltage digital of described signal acquisition point (3).
6. button according to claim 5, is characterized in that: before described signal acquisition point (3) is connected to described ADC module, also comprise the amplifying circuit (OP1) of described signal acquisition point (3) voltage amplification.
7. button according to claim 6, is characterized in that: in described signal acquisition point (3), be connected to described amplifying circuit (OP1) and be also provided with before analog switch (SW).
8. button according to claim 5, is characterized in that: before described signal acquisition point (3) is connected to described ADC module, be also provided with analog switch (SW).
9. button according to claim 1, is characterized in that: described light-sensitive element is phototriode or photo resistance.
10. button according to claim 9, is characterized in that: be also provided with the lighting device that key is thrown light on.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420236479.4U CN203851121U (en) | 2014-05-09 | 2014-05-09 | Key |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420236479.4U CN203851121U (en) | 2014-05-09 | 2014-05-09 | Key |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203851121U true CN203851121U (en) | 2014-09-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420236479.4U Expired - Lifetime CN203851121U (en) | 2014-05-09 | 2014-05-09 | Key |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105206032A (en) * | 2015-08-20 | 2015-12-30 | 威海市天罡仪表股份有限公司 | Micro-power consumption visible light sensing key and optical communicating and receiving method for instrument |
| CN106059557A (en) * | 2016-06-01 | 2016-10-26 | 郭利民 | Key adopting light-activated element and keyboard provided with key |
| CN108803882A (en) * | 2017-05-03 | 2018-11-13 | 深圳市伏茂斯科技开发有限公司 | Pressure touch keyboard based on optical sensor and its method |
-
2014
- 2014-05-09 CN CN201420236479.4U patent/CN203851121U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105206032A (en) * | 2015-08-20 | 2015-12-30 | 威海市天罡仪表股份有限公司 | Micro-power consumption visible light sensing key and optical communicating and receiving method for instrument |
| CN105206032B (en) * | 2015-08-20 | 2018-09-25 | 威海市天罡仪表股份有限公司 | Micro energy lose visible light induced key |
| CN106059557A (en) * | 2016-06-01 | 2016-10-26 | 郭利民 | Key adopting light-activated element and keyboard provided with key |
| CN108803882A (en) * | 2017-05-03 | 2018-11-13 | 深圳市伏茂斯科技开发有限公司 | Pressure touch keyboard based on optical sensor and its method |
| CN108803882B (en) * | 2017-05-03 | 2023-11-03 | 深圳市伏茂斯科技开发有限公司 | Pressure touch keyboard based on optical induction and method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20170321 Address after: 518000 Guangdong city of Shenzhen province Longhua new city road limpid water villa phase 2 512 Patentee after: SHENZHEN FOREMOST TECHNOLOGY CO.,LTD. Address before: Guangdong city of Shenzhen Province, 518000 people in the Longhua District 1 District 2 building 512 limpid water villa Patentee before: Guo Limin |
|
| CX01 | Expiry of patent term |
Granted publication date: 20140924 |