CN101923980A - Membrane switch with display function - Google Patents

Membrane switch with display function Download PDF

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Publication number
CN101923980A
CN101923980A CN 201010278354 CN201010278354A CN101923980A CN 101923980 A CN101923980 A CN 101923980A CN 201010278354 CN201010278354 CN 201010278354 CN 201010278354 A CN201010278354 A CN 201010278354A CN 101923980 A CN101923980 A CN 101923980A
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China
Prior art keywords
thin film
module
film switch
connects
main control
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Granted
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CN 201010278354
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Chinese (zh)
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CN101923980B (en
Inventor
张一鸣
肖庚申
李万政
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EELY-ECW TDI Co Ltd
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EELY-ECW TDI Co Ltd
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Abstract

The invention discloses a membrane switch with a display function, comprising a membrane switch, a main control module, a power source, a boosting module, a level conversion module and a shift register, wherein, the surface of the membrane switch is combined with a layer of electronic paper; the power source is connected with the main control module and the boosting module; the membrane switch is connected onto the input end of the main control module; one path of the output end of the main control module is connected with the input end of the boosting module; the other path of the output end of the main control module is connected with the input end of the level conversion module; one path of the output end of the boosting module is connected with the input end of the shift register; the other path thereof is connected with the input end of the level conversion module; the output end of the level conversion module is also connected with the other path of the input end of the shift register; and the output end of the shift register is connected with the electronic paper. The membrane switch with the display function of the invention simultaneously has the control and display functions, and has the advantages of frivolity, bendability, low power consumption and less possibility of damage.

Description

A kind of thin film switch with a display func
Technical field
The invention belongs to technical field of electronic components, relate in particular to a kind of thin film switch.
Background technology
Existing thin film switch product, switch itself can not display patterns, could realize display pattern by the TFT-LCD display screen.Could realize the function controlling and show respectively but these two parts need separate, and because the TFT-LCD display screen, make the product inflexibility, power consumption is big, and is fragile, thicker.
Summary of the invention
For this reason, technical problem to be solved by this invention provides a kind of thin film switch with a display func, this thin film switch has control and Presentation Function simultaneously, and have frivolous, flexible, power consumption is little, the advantage that should not damage, to overcome the defective that prior art exists.
In order to solve the problems of the technologies described above, the present invention adopts following technical scheme.
A kind of thin film switch with a display func comprises thin film switch, it is characterized in that: described thin film switch surface recombination has one deck Electronic Paper, and includes main control module, power supply, boost module, level switch module, shift register; Described power supply connects main control module and boost module, and described thin film switch is connected to the input of main control module, and the output one tunnel of described main control module connects the input of boost module, and another road connects the input of level switch module; The output one tunnel of described boost module connects the input of shift register, and another road connects the input of level conversion module; The output of described level switch module also connects another road input of shift register, and the output of described shift register connects Electronic Paper.
In order to have realized colored demonstration, also be compounded with color panel on the described Electronic Paper.For Electronic Paper is protected, also has upper protective film between described Electronic Paper and the color panel.
In order to realize the many by key control of thin film switch, described thin film switch has a plurality of buttons, and described Electronic Paper is divided into a plurality of viewing areas corresponding with each button.
In preferred implementation of the present invention, described level switch module mainly comprises transistor, and described transistorized base stage connects the output and the button of main control module, grounded emitter, and collector electrode connects the output of boost module and the input of shift register.Adopt transistor to carry out level conversion and have series of advantages such as simple in structure, power consumption is little, signal controlling sensitivity.
Adopt technique scheme, adopt Electronic Paper as the display interface of thin film switch and Electronic Paper is compounded in the surface of thin film switch, so just can be so that thin film switch of the present invention has control and Presentation Function simultaneously, because Electronic Paper has series of advantages such as frivolous, flexible, that power consumption is little, just makes thin film switch of the present invention also have series of advantages such as frivolous, flexible, that power consumption is little.
Description of drawings
The present invention is described in detail below in conjunction with the drawings and specific embodiments:
Fig. 1 is a structural profile schematic diagram of the present invention;
Fig. 2 is a circuit block diagram of the present invention;
Fig. 3 is a circuit diagram of the present invention;
Fig. 4 is that key switch of the present invention and Electronic Paper viewing area distribute and the annexation schematic diagram.
Embodiment
As shown in Figure 1, thin film switch with a display func of the present invention comprises thin film switch 100 and the Electronic Paper 200 on it.Thin film switch 100 constitutes by circuit 104 on circuit 102, double faced adhesive tape 103, the thin film switch under down diaphragm 101, the thin film switch, PET negative 105 are compound from top to bottom successively.PET Electronic Paper 200 is positioned on the PET negative 105 and accompanies Electronic Paper circuit 201 between the two, and one deck upper protective film 202 is pasted on the Electronic Paper surface then.In order to make the pattern that shows have color effect, also be compounded with color panel 204 by double faced adhesive tape 203 on the described upper protective film 202.At thin film switch 100 is under the situation about pressing, under the thin film switch on circuit 102 and the thin film switch circuit 104 under double faced adhesive tape 103 intercepts, be separated from each other, thin film switch is in off-state, after pressing, and circuit 104 just connection conductions on circuit 102 and the thin film switch under the thin film switch.
Because Electronic Paper 200 has series of advantages such as frivolous, flexible, that power consumption is little, just realized that by Electronic Paper being compounded in the thin film switch surface thin film switch of the present invention has control and Presentation Function simultaneously like this, and have series of advantages such as frivolous, flexible, that power consumption is little, thereby can further expand the application of thin film switch.
As described in Figure 4, in the embodiments of the invention, Electronic Paper 200 is divided into five viewing areas, be respectively A-ZONE viewing area, B-ZONE viewing area, C-ZONE viewing area, D-ZONE viewing area and white space, to should five zones, thin film switch 100 also is divided into Touch-A, Touch-B, Touch-C, five buttons of Touch-D, General Switch.
As shown in Figure 2, include main control module 300, power supply 400, boost module 500, level switch module 600 and shift register 700 in the connecting circuit between Electronic Paper 200 and the thin film switch 100.
Wherein, power supply 400 connects main control module 300 and boost module 500, is the two power supply.Thin film switch 100 is connected to the input of main control module 300, and the output one tunnel of main control module 300 connects the input of boost module 500, and another road connects the input of level switch module 600; The output one tunnel of boost module 500 connects the input of shift register 700, and another road connects the input of level conversion module 600; The output of level switch module 600 also connects another input of shift register 700; The output of shift register 700 connects Electronic Paper 200.
Particularly, as shown in Figure 3, power supply 400 adopts 3V button cell 401, and is stable in order to ensure voltage, and capacitor C 1 in parallel is come the filtering steady voltage on the 3V button cell 401.
Main control module 300 adopts pic chip 12F629.Wherein, the 1st pin (VDD) of pic chip 12F629 connects 3V button cell 401, the 4 pin (GP3/VPP) and also connects 3V button cell 401, the 8 pin (VSS) ground connection through resistance R 3.
Boost module 500 main employings are boosted chip CAT37 and are cooperated inductance L 1 and capacitor C 2.Wherein, boost the 5th pin (VIN) of chip CAT37 connects the 2nd pin (GP5/CLKIN) that 3V button cell 401, the 4 pin (SHDN) connect pic chip 12F629; The 1st pin (SW) connects the anodal of diode D1 and is connected 3V button cell 401 again through inductance L 1; The 2nd pin (GND) ground connection; One end ground connection of capacitor C 2; In addition, also have resistance R 1 and resistance R 2 series connection backs one end ground connection, the other end of the other end and capacitor C 2 and the negative pole of diode D1 link together as the output of boost module; The 3rd pin (FB) of chip CAT37 of boosting also is connected on the node between resistance R 1 and the resistance R 2.Boosting mode is: export 4th pin (SHDN) of the voltage of 3V to the chip CAT37 that boosts by the 2nd pin (GP5/CLKIN) of pic chip 12F629, start working after the chip CAT37 that boosts is corresponding, carry out the voltage output of 15V.
Level switch module 600 mainly contains transistor Q1, transistor Q2, transistor Q3 and resistance R 4, R5, R6, R7, R8, R9 formation, wherein, the base stage of transistor Q1, transistor Q2, transistor Q3 connects the 7th pin (GP0), the 6th pin (GP1), the 5th pin (GP2) of pic chip 12F629 respectively through resistance R 4, R7, R9; The equal ground connection of emitter of transistor Q1, transistor Q2, transistor Q3; The collector electrode of transistor Q1, transistor Q2, transistor Q3 connects the output of boost module 500 respectively through resistance R 5, R6, R8.
Shift register 700 adopts register HEF4094B, and its 1st pin (STR), the 2nd pin (D), the 3rd pin (CP) connect the collector electrode of transistor Q3, transistor Q1, transistor Q2 respectively; The 15th pin (OE) and the 16th pin (VDD) are through the output of resistance R 6 connection boost modules 500, the 8th pin (VSS) ground connection.The 2nd pin (D) is for transmitting data, and the 3rd pin (CP) is for providing the clock pulse that sends data, and the 1st pin (STR) is realized latching of data.
In the present embodiment, Electronic Paper is to be connected with foregoing circuit by line bank 800 with thin film switch, be the 1st pin, the 2nd pin, the 3rd pin, the 4th pin and the 5th pin that the 4th pin (QP0), the 5th pin (QP1), the 6th pin (QP2), the 7th pin (QP3) and the 14th pin (QP4) of register HEF4094B connects line bank 800 respectively, and corresponding common port, A-ZONE viewing area, B-ZONE viewing area, C-ZONE viewing area and the D-ZONE viewing area of connecting of the 1st pin of line bank 800, the 2nd pin, the 3rd pin, the 4th pin and the 5th pin; The 3rd pin (GP4/CLKIN), the 4th pin, the 5th pin, the 6th pin and the 7th pin of pic chip 12F629 connects the 8th pin, the 9th pin, the 10th pin, the 7th pin and the 6th pin of line bank 800 respectively, and then be connected to General Switch button, Touch-D button, Touch-C button, Touch-B button and Touch-A button, and the 11st pin ground connection of line bank 800.
More than be exactly the circuit structure of thin film switch with a display func of the present invention, the working method of its circuit is as follows:
Define system state variable uchar keyvalue=0 is with the present residing state of indication mechanism in software.During the main control module operate as normal, it can constantly remove to scan Touch-A, Touch-B, Touch-C, five buttons of Touch-D, General Switch, when button is not pressed, button does not contact with ground wire, Touch-A, Touch-B, Touch-C, Touch-D and General Switch are high level.When General Switch is pressed, General Switch ground connection, at this moment General Switch is changed to low level, and main control module will detect General Switch and be pressed.At this moment the keyvalue assignment is the 1(open state); Accordingly, when General Switch was not pressed, the keyvalue assignment was 0 expression holding state, looses one's grip if constantly press on General Switch back and forth, and the Keyvalue circulation is 1 and 0.
Be that Touch-A, the button of Touch-B, Touch-C, Touch-D press just can be effectively under 1 o'clock the open state at keyvalue.Under keyvalue is 0 o'clock holding state, Touch-A, the button of Touch-B, Touch-C, Touch-D is pressed, main control module is not handled, that is to say Touch-A, whether no matter Touch-B, Touch-C, Touch-D press, and all are invalid (certain main control module also can detect button and whether press, and does not just handle this signal).At keyvalue is 1 o'clock, Touch-A, arbitrary button of Touch-B, Touch-C, Touch-D is pressed, and main control module can be set to 3 by keyvalue, at this moment state is being flashed in system, and the corresponding viewing area of the Electronic Paper above the button that is pressed begins to flash.(such as Touch-D presses, the D-ZONE viewing area begins flicker).Under this state, if push other button (as Touch-A or Touch-B or Touch-C), at this moment the D-ZONE viewing area stops flicker, switches to the zone (A-ZONE viewing area or B-ZONE viewing area or C-ZONE zone) of other key correspondences of just having pressed.
Flash under the state, press General Switch button, system can enter resting state.
Adopt said structure, circuit of the present invention also has following advantage.
1, resource utilization ratio height.Under the situation of main control chip pin shortage, timesharing is reused, and promptly can be used for exporting video data, and also can be used and do the button pin, be the high solution of a kind of low-cost cost performance.
2, meet the low-carbon environment-friendly requirements of saving energy.The great advantage that Electronic Paper itself shows is exactly frivolous power saving, and Electronic Paper is a voltage driven type, after show state is stable, does not just need applied voltage, does not need consumed power certainly.Main control module is controlled boost module by independent pin, and when at this moment the pin of main control chip removes to scan button, it will be closed boost module and come power saving.Itself was lossy when boost module boosted, and conversion efficiency has only 80%.Power saving has just been accomplished ultimate attainment like this.
3, system is provided with three kinds of states, flashes state, operating state, and resting state, only flashing with operating state is to want consumed power, though also consumed power of resting state, energy loss is minimum.
More than be exactly thin film switch with a display func of the present invention, can find that by describing in detail it has control and Presentation Function simultaneously, and have series of advantages such as frivolous, flexible, that power consumption is little, should not damage.
But; those skilled in the art will recognize that; above-mentioned embodiment is exemplary; be in order better to make those skilled in the art can understand this patent; can not be interpreted as it is restriction to this patent protection range; so long as according to spirit that this patent discloses done anyly be equal to change or modify, all fall into the scope of this patent protection.

Claims (7)

1. a thin film switch with a display func comprises thin film switch, it is characterized in that: described thin film switch surface recombination has one deck Electronic Paper, and includes main control module, power supply, boost module, level switch module, shift register; Described power supply connects main control module and boost module, and described thin film switch is connected to the input of main control module, and the output one tunnel of described main control module connects the input of boost module, and another road connects the input of level switch module; The output one tunnel of described boost module connects the input of shift register, and another road connects the input of level conversion module; The output of described level switch module also connects another road input of shift register, and the output of described shift register connects Electronic Paper.
2. thin film switch with a display func according to claim 1 is characterized in that: also be compounded with color panel on the described Electronic Paper.
3. thin film switch with a display func according to claim 2 is characterized in that: have upper protective film between described Electronic Paper and the color panel.
4. thin film switch with a display func according to claim 1 is characterized in that: described thin film switch has a plurality of buttons, and described Electronic Paper is divided into a plurality of zones corresponding with each button.
5. thin film switch with a display func according to claim 4, it is characterized in that: described level switch module mainly comprises transistor, described transistorized base stage connects the output and the button of main control module, grounded emitter, collector electrode connects the output of boost module and the input of shift register.
6. thin film switch with a display func according to claim 5 is characterized in that: described main control module is pic chip 12F629; Described shift register is register HEF4094B; Described boost module is by boosting chip CAT37 and constitute with inductance and electric capacity that the chip CAT37 that boosts is used.
7. thin film switch with a display func according to claim 5 is characterized in that: described power supply is the 3V button cell.
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CN2010102783544A 2010-09-10 2010-09-10 Membrane switch with display function Expired - Fee Related CN101923980B (en)

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Application Number Priority Date Filing Date Title
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CN101923980B CN101923980B (en) 2012-04-18

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1031926A (en) * 1996-07-15 1998-02-03 Nec Data Terminal Ltd Membrane switch key board
JP2000067693A (en) * 1998-08-27 2000-03-03 Tokai Rika Co Ltd Disc spring contact type membrane switch
CN101106584A (en) * 2006-07-14 2008-01-16 三星电子株式会社 Keypad and keypad assembly
CN201765998U (en) * 2010-09-10 2011-03-16 上海意力东笃电路世界有限公司 A film switch with display function

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1031926A (en) * 1996-07-15 1998-02-03 Nec Data Terminal Ltd Membrane switch key board
JP2000067693A (en) * 1998-08-27 2000-03-03 Tokai Rika Co Ltd Disc spring contact type membrane switch
CN101106584A (en) * 2006-07-14 2008-01-16 三星电子株式会社 Keypad and keypad assembly
CN201765998U (en) * 2010-09-10 2011-03-16 上海意力东笃电路世界有限公司 A film switch with display function

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
《计算机测量与控制》 20100731 胡力刚，许伟明 电子纸阅读器的设计 1621-1626 1-7 第18卷, 第7期 2 *

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