CN2802867Y - Capacitive touch induction push-button circuit of TV set - Google Patents
Capacitive touch induction push-button circuit of TV set Download PDFInfo
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- CN2802867Y CN2802867Y CN 200520084736 CN200520084736U CN2802867Y CN 2802867 Y CN2802867 Y CN 2802867Y CN 200520084736 CN200520084736 CN 200520084736 CN 200520084736 U CN200520084736 U CN 200520084736U CN 2802867 Y CN2802867 Y CN 2802867Y
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Abstract
The utility model discloses a capacitive touch induction push-button circuit of TV set, comprising an induction electrode, a touch induction chip and an indicating lamp switch circuit. Selections to the switch and the function of the TV set are realized through abandoning a mechanical push-button on traditional TV set but adopting a capacitive touch induction push-button, therefore the request to the pressure sensitivity and insufficiencies of poor hand feeling, short service life and being accomplished by push-button noises produced by adopting the mechanical push-button are effectively avoided, consumers' request to the multiple functionality of the TV set with high quality is satisfied, and the key of the TV set is aesthetic and practical. The capacitive touch induction key has simple circuit construction, low cost and high sensibility; compared to the phototonus technique, the capacitive touch induction key has features of stable performance, strong interference immunity and being suitable to various light environments, and can be widely applied to other high electric appliances.
Description
Technical field
The utility model relates to a kind of improvement of TV set circuit, specifically, relates to a kind of capacitance touch induced key circuit of television set.
Background technology
Continuous development along with science and technology, the raising gradually of personal consumption level, appreciation grade, people not only are confined in the reception of TV programme and the raising to its image, Television Sound Quality, and appearance and modeling becomes the important references point of consumers in general when choosing tv product already.On present tv product, switch key and function button generally all adopt common mechanical type button, realize the switch of power supply and the selection of function by the finger presses button.This mechanical type has used by key technology and has developed manyly year, and similar touch-switch etc. is novel to be occurred by key technology though constantly have, as the mechanical type button, its problems such as intrinsic feel, life-span do not solved up hill and dale.And, the mechanical type button in use, not only the suffered pressure of button is influential to its sensitivity, and the kaka sound that button produces can bring unnecessary noise to the consumer, influence consumer's auditory perception, simultaneously, also can impact the overall aesthetics of television set.
Summary of the invention
The feel that television set adopts the mechanical type button to be brought in the prior art is poor, the life-span short in order to overcome for the utility model, be attended by the deficiency of button noise, a kind of novel TV machine touch sensible button is provided, use this touch sensible button, user's only with hand refers to touch gently on the position of respective keys, can finish the corresponding operating to television set, it is quick to be easy to use, and has improved the overall appearance and the hommization demand of tv product.
For solving the problems of the technologies described above, the utility model is achieved by the following technical solutions:
A kind of capacitance touch induced key circuit of television set, the control panel of television set is provided with induction electrode, described induction electrode links to each other with induction chip, and the output of induction chip connects the indicator light switch circuit on the one hand, and the treatment circuit with television set inside links to each other on the other hand.
As further qualification to technique scheme, in described indicator light switch circuit, include at least one group of switch element, the control end of described switch element links to each other with the corresponding output end of induction chip, be communicated with to hold and link to each other other end ground connection with DC power supply through light-emitting diode.
As further limiting again to technique scheme, described switch element is a triode, and the base stage of its triode links to each other with the output of induction chip, and collector electrode links to each other with DC power supply through light-emitting diode on the one hand, on the other hand through capacity earth, the grounded emitter of described triode.
As the further qualification again to technique scheme, described induction electrode links to each other with an input of induction chip on the one hand through resistance, connects another input of induction chip on the other hand through electric capacity; The sensitive time selecting side ground connection of described induction chip or link to each other with DC power supply.
As further qualification to technique scheme, described induction chip is six key position capacitive induction chip QT160, its six outputs link to each other with the base stage of six triodes in the described indicator light switch circuit respectively, the collector electrode of described six triodes links to each other with DC power supply through a light-emitting diode respectively on the one hand, on the other hand respectively through a capacity earth, the grounded emitter of six triodes.
Compared with prior art, advantage of the present utility model and good effect are: the utility model adopts the capacitance touch induced key to realize the switch of television set and the selection of function by the mechanical type button on the abandoning tradition TV, thereby effectively avoided adopting of the requirement of mechanical type button to pressure-sensitivity, and feel is poor, useful life short, be attended by the deficiency of button noise, satisfied the multi-functional requirement of consumer, made the TV button attractive in appearance, practical the high quality television machine.This capacitance touch induced key circuit structure is simple, with low cost, highly sensitive, and compare the photoinduction technology and have stable performance, strong interference immunity, the characteristics of suitable various light environments can be widely applied in other the high-end electrical equipment.
Description of drawings
The schematic diagram of the capacitive induction chip that Fig. 1 is in the utility model to be adopted;
Fig. 2 is the concrete circuit connection diagram of capacitance touch induced key circuit of the present utility model.
Embodiment
Below in conjunction with the drawings and specific embodiments the utility model is described in further detail.
The latest generation capacitive induction chip QT160 that the utility model adopts QUANTUM company to produce realizes, it can see through the action that various dielectric materials such as glass, plastics, wooden product are sensed button, and has a self-correcting function, can adjust sensitivity automatically when seeing through different media, need not user intervention and regulate.This capacitive induction chip QT160 have peripheral circuit connect simple, highly sensitive, stable performance, advantage such as cost is low, its capacitance induction principle figure is referring to shown in Figure 1.
Among Fig. 1, when staff near induction electrode K
xThe time, staff and induction electrode K
xBetween capacitor C
x(C
X1+ C
X2+ C
X3) on charge Q
xTo induction electrode K
xAnd the capacitor C between the induction chip U1
SThe C of (＜＜
x) charging, the electric capacity analog to digital converter of induction chip U1 by a 14bit is to the charge period quantification of sampling.C
SMore little, it is fast more to charge, and resolution is low more; Otherwise, C
SBig more, it is slow more to charge, and resolution is high more, therefore, changes C
SValue can change the induction sensitivity scope effectively.The output of induction chip U1 can be directly connected to the I/O mouth of CPU, also direct driving LED indicator light, thus realize induced key backlight.
Fig. 2 is the concrete circuit connection diagram of capacitance touch induced key circuit of the present utility model.Induction chip U1 is a 6 key position induction chips, comprise 6 induction electrode K01～K06, described 6 induction electrode K01～K06 link to each other with road input SNS1A～SNS6A of induction chip U1 through resistance R 1～R6 respectively, and connect another road input SNS1B～SNS6B of induction chip U1 respectively through capacitor C 1～C6.Capacitor C
S(C1～C6) choosing of value can be determined by test, under the situation that guarantees sensitivity, selects less appearance value to help further suppressing to disturb, and prevents misoperation.Resistance R
S(effect of R1～R6) is to improve stability.Utilize the software function of chip U1, can also realize the inhibit feature of adjacent key position, adjacent two keys can not be started to control simultaneously, avoid the misoperation of pointing.
Output OUT1～OUT6 of induction chip U1 connects the base stage as the NPN type triode Q6～Q1 of switch element respectively, and its collector electrode links to each other grounded emitter with current-limiting resistance R16～R11 with DC power supply VCC through light-emitting diode DS6～DS1 respectively.When staff touches a certain induction electrode K01～K06, its corresponding output OUT1～OUT6 exports high level, controls connected triode Q1～Q6 conducting, and DC power supply VCC is diode DS1～DS6 power supply, control that it is luminous, the button that the user touches is indicated.Change the resistance of current-limiting resistance R11～R16, can regulate brightness backlight.Should prevent interference guaranteeing to select less resistance under the bright enough situation backlight to induction electrode.
In addition, output OUT1～OUT6 of induction chip U1 also links to each other with the CPU of television set inside by line bank JP1, and CPU carries out corresponding process operations according to the key command that receives.
On described induction chip U1, also be provided with sensitive time selecting side OPT2, by the wire jumper setting, or ground connection, or connect DC power supply, thereby realize that the maximum sensitive time switches between 60 seconds and infinity.
Whether the design of whole printed board has crucial effects to success or not, the sensitivity of induced key, can cause the anti-interference difference accidentally or cause problems such as sensitivity is low the shielding stratum cabling of induction electrode, needs thorough consideration and repetition test.
Certainly; above-mentioned explanation is not to be to restriction of the present utility model; the utility model also is not limited in above-mentioned giving an example, and variation, remodeling, interpolation or replacement that those skilled in the art are made in essential scope of the present utility model also should belong to protection range of the present utility model.
Claims (10)
1. the capacitance touch induced key circuit of a television set, it is characterized in that: the control panel of television set is provided with induction electrode, described induction electrode links to each other with induction chip, the output of induction chip connects the indicator light switch circuit on the one hand, and the treatment circuit with television set inside links to each other on the other hand.
2. television set touch key-press circuit according to claim 1, it is characterized in that: in described indicator light switch circuit, include at least one group of switch element, the control end of described switch element links to each other with the corresponding output end of induction chip, be communicated with to hold and link to each other other end ground connection with DC power supply through light-emitting diode.
3. the capacitance touch induced key circuit of television set according to claim 1 and 2, it is characterized in that: described switch element is a triode, the base stage of its triode links to each other with the output of induction chip, and collector electrode links to each other with DC power supply through light-emitting diode, grounded emitter.
4. the capacitance touch induced key circuit of television set according to claim 3, it is characterized in that: the collector electrode of described triode is through capacity earth.
5. the capacitance touch induced key circuit of television set according to claim 1 and 2, it is characterized in that: described induction electrode links to each other with an input of induction chip on the one hand through resistance, connects another input of induction chip on the other hand through electric capacity.
6. the capacitance touch induced key circuit of television set according to claim 1 and 2 is characterized in that: the sensitive time selecting side ground connection of described induction chip.
7. the capacitance touch induced key circuit of television set according to claim 1 and 2, it is characterized in that: the sensitive time selecting side of described induction chip links to each other with DC power supply.
8. the capacitance touch induced key circuit of television set according to claim 3, it is characterized in that: described induction chip is six key position capacitive induction chips, its six outputs link to each other with the base stage of six triodes in the described indicator light switch circuit respectively, the collector electrode of described six triodes links to each other with DC power supply through a light-emitting diode respectively, grounded emitter.
9. the capacitance touch induced key circuit of television set according to claim 8, it is characterized in that: the collector electrode of described six triodes is respectively through a capacity earth.
10. the capacitance touch induced key circuit of television set according to claim 3, it is characterized in that: the model of described touch sensible chip is QT160.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520084736 CN2802867Y (en) | 2005-06-27 | 2005-06-27 | Capacitive touch induction push-button circuit of TV set |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520084736 CN2802867Y (en) | 2005-06-27 | 2005-06-27 | Capacitive touch induction push-button circuit of TV set |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2802867Y true CN2802867Y (en) | 2006-08-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520084736 Expired - Fee Related CN2802867Y (en) | 2005-06-27 | 2005-06-27 | Capacitive touch induction push-button circuit of TV set |
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|---|---|
| CN (1) | CN2802867Y (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102148902A (en) * | 2011-05-03 | 2011-08-10 | 惠州Tcl移动通信有限公司 | Mobile phone |
| CN104242894A (en) * | 2013-06-09 | 2014-12-24 | 江苏宜清光电科技有限公司 | Touch button projector |
| CN106851161A (en) * | 2017-04-01 | 2017-06-13 | 杨建新 | A kind of television set containing touch function |
| US9677740B2 (en) | 2014-02-21 | 2017-06-13 | Toshiba Global Commerce Solutions Holdings Corporation | Transforming graphical expressions to indicate button function |
| CN107295281A (en) * | 2016-03-31 | 2017-10-24 | 青岛海信电器股份有限公司 | Display device and control method |
| CN108809290A (en) * | 2018-08-08 | 2018-11-13 | 中山市悦辰电子实业有限公司 | A kind of anti-impulse disturbances circuit of touch key-press |
-
2005
- 2005-06-27 CN CN 200520084736 patent/CN2802867Y/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102148902A (en) * | 2011-05-03 | 2011-08-10 | 惠州Tcl移动通信有限公司 | Mobile phone |
| CN104242894A (en) * | 2013-06-09 | 2014-12-24 | 江苏宜清光电科技有限公司 | Touch button projector |
| US9677740B2 (en) | 2014-02-21 | 2017-06-13 | Toshiba Global Commerce Solutions Holdings Corporation | Transforming graphical expressions to indicate button function |
| US10690320B2 (en) | 2014-02-21 | 2020-06-23 | Toshiba Global Commerce Solutions | Transforming graphical expressions to indicate button function |
| CN107295281A (en) * | 2016-03-31 | 2017-10-24 | 青岛海信电器股份有限公司 | Display device and control method |
| CN106851161A (en) * | 2017-04-01 | 2017-06-13 | 杨建新 | A kind of television set containing touch function |
| CN108809290A (en) * | 2018-08-08 | 2018-11-13 | 中山市悦辰电子实业有限公司 | A kind of anti-impulse disturbances circuit of touch key-press |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |