CN102055455A

CN102055455A - Novel wall touch screen switch

Info

Publication number: CN102055455A
Application number: CN2009102222180A
Authority: CN
Inventors: 张繁荣
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-11-09
Filing date: 2009-11-09
Publication date: 2011-05-11

Abstract

The invention discloses functions and a schematic diagram of a novel wall touch screen switch. The novel wall touch screen switch comprises a power circuit A, a logic control chip circuit B (singlechip), an output control relay circuit C, a touch screen D and a backlight source E. The switch has the advantages of attractive appearance, strong functions, simple circuits, low cost, wide input voltage range, good output stability, low noise, durability and wide market prospect and is a novel product for replacing a mechanical contact type wall switch.

Description

Novel wall touch-screen switch

Technical field

The invention belongs to a kind of wall touch-screen switch.

Background technology

Touch-screen is used a lot at present on market, as infrared touch panel, surface acoustic wave touch screen, but commonly used resistive touch screen, capacitive touch screen is arranged.Resistive touch screen belongs to a kind of transducer that physical location is converted to the magnitude of voltage of representing X, Y coordinate that is equivalent to.It is as basic unit by one deck glass or polymethyl methacrylate, the surface scribbles the conductive layer of layer of transparent, be stamped one deck outer surface cure process, smooth scratch resistant plastic layer above again, its inner surface also scribbles the layer of transparent conductive layer, has the transparent isolating points of many tiny (less than mils) that they are separated insulation between two conductive layers.When the finger touch screen, the two conductive layers of usual mutually insulated has just had a contact in the position, touch point, cause is the even voltage field of 5V of a conductive layer connection Y direction wherein, make the voltage of detecting layer become non-zero by zero, after controller detects this signal of telecommunication, carry out A/D conversion, and with the magnitude of voltage that obtains compare with 5V get final product the Y-axis coordinate of touch point, in like manner draw the coordinate of X-axis, reach the output of control voltage.Capacitive touch screen is to utilize the induction by current of human body to carry out work.Capacitive touch screen is four layers of compound glass screen; glass screen inner surface and interlayer respectively scribble one deck ITO, and outermost layer is a skim silicon soil glassivation, on the interlayer ITO coating as working face; draw four electrodes on four angles, internal layer ITO is that screen is to guarantee good working environment.When finger touch is on metal level, because people's bulk electric field, user and touch screen surface form a coupling capacitance, for high-frequency current, electric capacity is direct conductor, so finger siphons away a very little electric current from contact point, this electric current flows out the electrode from four jiaos of touch-screens respectively, and the electric current of these four electrodes of flowing through is directly proportional with the distance of finger, and controller draws touch point position by the accurate Calculation to these four current ratios.But there is no at present the wall touch-screen switch that combines and make with resistive touch screen or capacitive touch screen and single-chip microcomputer both at home and abroad.

Summary of the invention

The present invention provides a kind of novel wall touch-screen switch and directly replaces the mechanical contact-type switch on wall.

The another kind of purpose of the present invention provides a kind of function and schematic diagram thereof of novel wall touch-screen switch.

For achieving the above object, the technical scheme that the present invention takes is: it forms (seeing schematic diagram A-A) by power circuit A, logic control chip circuit B (single-chip microcomputer), output control relay circuit C, touch-screen D, backlight E five major parts novel wall touch-screen switch.

Description of drawings

Accompanying drawing is schematic diagram A-A of the present invention.

Embodiment

Power circuit A by protective tube F1, bridge rectifying block B1, filter capacitor C2, peak absorbance diode D4, R16, C3, switch control chip U3, filter capacitor C4, C5, C6, C7, C9, diode D6, light idol ISO1, current-limiting resistance R18, divider resistance R19, R20, accurate pressurizer U4, return feed and hold C8, switch transformer T1, filtered diode D5, D8 and form; Logic control chip circuit B is made up of logic control chip U1 (single-chip microcomputer), crystal oscillator Y1; Output control relay circuit C is made up of relay K 1, K2, K3, K4, current-limiting resistance R9, R14, R15, R17, sustained diode 1, D2, D3, D7, protection triode Q1, Q2, Q3, Q4, binding post (wiring is inserted) CON3; Touch-screen D is made up of touch-screen KEYBORAD, pull-up resistor R1, R2, R3, R4; Backlight E is made up of CON4 backlight, current-limiting resistance R5, R6, R7, R8, R10, R11, R12, R13.

Its operation principle is: A C, is exported by switch transformer T1 by capacitor C 2 filtering, D4, R16, C3 peak absorbance through B 1 rectification; One the tunnel obtains after D5, C4 filtering+12V supply output control relay circuit C use; One the tunnel obtains after D8, C5 filtering+5V supply logic control chip U1 (single-chip microcomputer) use; One the tunnel takes out identification voltage after R19, R20, dividing potential drop, return the light idol SO1 that feeds by returning feed appearance C8, and, deliver to switch control chip U3 by the output of light idol again by accurate pressurizer U4 voltage stabilizing, voltage after the U3 alignment is delivered to switch transformer T1, makes the voltage of output more stable; Logic control chip U1 (single-chip microcomputer) is by 4 pin and the power supply of 14 pin, by 10 pin, 11 pin, 12 pin, the output of 13 pin, and deliver to the Kai Heguan that each output control relay circuit C that organizes controls this group relay through current-limiting resistance R9, R14, R15, R17 respectively, thereby realize opening and closing of external circuit; Q1, Q2, Q3, Q4 are the protection triodes, and CON3 is output wiring terminal (wiring is inserted); The signal that touch-screen touches is by 17 pin, 18 pin, 1 pin, the input of 2 pin of logic control chip U1; R1, R2, R3, R4 pull-up resistor; The control signal of backlight E is respectively by 6 pin of logic chip U1,7 pin, 8 pin, the output of 9 pin, controls turning on and extinguishing of CON4 backlight; R5, R6, R7, R8, R10, R11, R12, R13 are current-limiting resistances; Backlight is mounted in touch-screen behind, makes it can show switch pattern on the touch-screen clearly.

The present invention has following advantage: it have aesthetic in appearance, function is strong, circuit is simple, cost is low, wide input voltage range, output stability is good, noise is low, durable, market prospects are wide, are the novel products that replaces the mechanical contact-type switch on wall.

Claims

1. novel wall touch-screen switch is characterized in that being made up of routine down circuit and components and parts: power circuit A, logic control chip circuit B (single-chip microcomputer), output control relay circuit C, touch-screen D, backlight E five most of form (seeing schematic diagram A-A); Power circuit A by protective tube F1, bridge rectifying block B1, filter capacitor C2, peak absorbance diode D4, R16, C3, switch control chip U3, filter capacitor C4, C5, C6, C7, C9, diode D6, light idol ISO1, current-limiting resistance R18, divider resistance R19, R20, accurate pressurizer U4, return feed and hold C8, switch transformer T1, filtered diode D5, D8 and form; Logic control chip circuit B is made up of logic control chip U1 (single-chip microcomputer), crystal oscillator Y1; Output control relay circuit C is made up of relay K 1, K2, K3, K4, current-limiting resistance R9, R14, R15, R17, sustained diode 1, D2, D3, D7, protection triode Q1, Q2, Q3, Q4, binding post (wiring is inserted) CON3; Touch-screen D is made up of touch-screen KEYBORAD, pull-up resistor R1, R2, R3, R4; Backlight E is made up of CON4 backlight, current-limiting resistance R5, R6, R7, R8, R10, R11, R12, R13.

2. the operation principle of novel a kind of wall touch-screen switch according to claim 1, it is characterized in that: AC, is exported by switch transformer T1 by capacitor C 2 filtering, D4, R16, C3 peak absorbance through the B1 rectification; One the tunnel obtains after D5, C4 filtering+12V supply output control relay circuit C use; One the tunnel obtains after D8, C5 filtering+5V supply logic control chip U1 (single-chip microcomputer) use; One the tunnel takes out identification voltage after R19, R20, dividing potential drop, return the light idol SO1 that feeds by returning feed appearance C8, and, deliver to switch control chip U3 by the output of light idol again by accurate pressurizer U4 voltage stabilizing, voltage after the U3 alignment is delivered to switch transformer T1, makes the voltage of output more stable; Logic control chip U1 (single-chip microcomputer) is by 4 pin and the power supply of 14 pin, by 10 pin, 11 pin, 12 pin, the output of 13 pin, and deliver to the Kai Heguan that each output control relay circuit C that organizes controls this group relay through current-limiting resistance R9, R14, R15, R17 respectively, thereby realize opening and closing of external circuit; Q1, Q2, Q3, Q4 are the protection triodes, and CON3 is output wiring terminal (wiring is inserted); The signal that touch-screen touches is by 17 pin, 18 pin, 1 pin, the input of 2 pin of logic control chip U1; R1, R2, R3, R4 pull-up resistor; The control signal of backlight E is respectively by 6 pin of logic chip U1,7 pin, 8 pin, the output of 9 pin, controls turning on and extinguishing of CON4 backlight; R5, R6, R7, R8, R10, R11, R12, R13 are current-limiting resistances; Backlight is mounted in touch-screen behind, makes it can show switch pattern on the touch-screen clearly.

3. novel wall touch-screen switch according to claim 2 is characterized in that: use the finger touch touch-screen, signal is sent to logic control chip U1 (single-chip microcomputer), again opening and closing by the Single-chip Controlling output relay.

4. novel wall touch-screen switch according to claim 2 is characterized in that: touch-screen can adopt resistive touch screen and capacitive touch screen.

5. novel wall touch-screen switch according to claim 2 is characterized in that: output relay can use one group of output or many group output.

6. novel wall touch-screen switch according to claim 2 is characterized in that: backlight CON4 can use one or more groups or not use backlight CON4.

7. novel wall touch-screen switch according to claim 2 is characterized in that: backlight is installed in touch-screen behind.

8. novel wall touch-screen switch according to claim 2 is characterized in that: relay output directly connects binding post (wiring is inserted) CON3.