CN1343963A - Digital electronic price-indicating LED screen without CPU - Google Patents
Digital electronic price-indicating LED screen without CPU Download PDFInfo
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- CN1343963A CN1343963A CN 00124771 CN00124771A CN1343963A CN 1343963 A CN1343963 A CN 1343963A CN 00124771 CN00124771 CN 00124771 CN 00124771 A CN00124771 A CN 00124771A CN 1343963 A CN1343963 A CN 1343963A
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- digital tubes
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Abstract
A digital LED display screen without PCU for showing the price of commodity features that its LED-type digital tubes are controlled by 7-segment encode switch other than peripherals and keypad, so reducing its cost to minimum. It uses 6-9 v DC power supply and can be widely used for displaying higit everywhere.
Description
The invention belongs to a kind of LED digital electronic display screen, be particularly suitable for the static occasion that shows the price numeral.
Existing LED digital and electronic display screen is substantially all formed the Presentation Function part by the LED charactron, and one-chip computer and peripheral circuit are formed control function and driven funtion part.And when showing static price data, only need to show when the LED numeral does not need operation processing function, just seem that with the circuit of being with single-chip microcomputer wasting very much hardware makes the display screen cost too high.
The purpose of this invention is to provide a kind of one-chip computer and external circuit, digital electronic price-indicating LED screen without CPU cheaply of not needing.
The present invention includes: a shell body, trade name hurdle, hurdle, the place of production, unit price hurdle, product advertising hurdle are arranged on housing face-plate, seven sections code switchs of four decimal system or bar shaped toggle switch are installed in housing handled easily part, have four to represent LED seven segment digital tubes individual, ten, one hundred, thousand numerical digit respectively in the unit price hurdle, radix point fixes on one hundred figure place.
It is characterized in that: each numerical digit, is controlled the numeral demonstration of one's own department or unit LED seven segment digital tubes through driver drives with seven sections code switchs of a decimal system; In1, in2, in3, in4, in5, in6, each the corresponding connection of in7 input end of a, the b of seven sections code switchs of the decimal system, c, d, e, f, g output terminal and driver; The corresponding connection of a, b, c, d, e, f, each section of g of the out1 of driver, out2, out3, out4, out5, out6, out7 output terminal and LED seven segment digital tubes.Common port phase and Lian Yuyi current-limiting resistance R1 one end of four LED seven segment digital tubes join, and the outer contact of the other end of resistance R 1 and supply hub joins.The com of seven sections code switchs of four decimal system end also connects and joins with the supply hub inner contact, four drivers the GND end join with power cathode.Represent the out8 end of radix point dp end and pairing driver of the LED seven segment digital tubes (LED2) of one hundred figure place to join with build-out resistor R*, the in8 end of driver joins with the power supply reference point.
Realize of the present invention its another be characterised in that: each numerical digit is used a SWDIP-8 bar shaped toggle switch, through driver drives, the numeral of one's own department or unit LED seven segment digital tubes is shown control; 16,15,14,13,12,11,10 ends of bar shaped toggle switch SW1, SW2, SW3, SW4 respectively with in1, in2, in3, in4, in5, in6, each the corresponding connection of in7 input end of U1, U2, U3, U4 driver, the in8 of U2 connects 9 ends of SW2; The corresponding connection of a, b, c, d, e, f, g, each section of dp of the out1 of driver U, out2, out3, out4, out5, out6, out7, out8 output terminal and each numerical digit LED seven segment digital tubes.The common port of four LED seven segment digital tubes mutually and Lian Yuyi current-limiting resistance R1 one end join, contact joins outside the other end of resistance R 1 and supply hub; 1,2,3,4,5,6,7,8 ends of U1, U2, U3, U4 driver and connecting with the supply hub inner contact join, and the GND end joins with power cathode; Represent one hundred figure place LED seven segment digital tubes (LED2) radix point dp end be connected in series a build-out resistor between the out8 of pairing driver holds.
LED charactron on the above display panel can be four also can not be four, the whole increase and decrease of unit display circuit, and method of attachment is identical.
Adopt seven sections code switch control modes, do not need peripheral circuit and keyboard to show and control the LED charactron, with the product of identical control LED charactron Presentation Function compare cost be belong to minimum.
Description of drawings:
Fig. 1 is seven sections code switch control modes of decimal system outside drawing.
Fig. 2 is a bar shaped toggle switch control mode outside drawing.
Fig. 3 is seven sections code switch control modes of decimal system circuit diagram.
Fig. 4 is a bar shaped toggle switch control mode circuit diagram.
Embodiment is described below with reference to the accompanying drawings:
Seven sections code switchs of the decimal system are a kind ofly to represent the logic coding switching device of decimal number font a, b, c, d, e, f, 7 output terminals of g and 1 com common port are arranged with seven stroke sections.Can select 0～9 numeral arbitrarily by stirring the mechanical digital wheel, export seven sections code switch states of this numeral simultaneously, after driving, light corresponding LED charactron stroke section.Output terminal a, b, c, d, e, f, com made up connection when seven sections code switchs of the decimal system were selected to show " 0 "; B, c, com make up connection when selecting to show " 1 "; A, b, d, e, g, com make up connection when selecting to show " 2 "; A, b, c, d, g, com make up connection when selecting to show " 3 "; B, c, f, g, com make up connection when selecting to show " 4 "; A, c, d, f, g, com make up connection when selecting to show " 5 "; A, c, d, e, f, g, com make up connection when selecting to show " 6 "; A, b, c, com make up connection when selecting to show " 7 "; A, b, c, d, e, f, g, com make up connection when selecting to show " 8 "; A, b, c, d, f, g, com make up connection when selecting to show " 9 ".
SWDIP-8 bar shaped toggle switch is the box-like on-off switches of a kind of eight hytes, can constitute seven sections fonts of 0～9 with the assembled state of break-make, and the on off state of combination is lighted corresponding LED charactron stroke section after driving.1, a, b, c, d, e, f, g, each section of dp of the corresponding LED charactron of 2,3,4,5,6,7,8 each switch bit difference;
1,2,3,4,5,6 is allocated to ON during expression " 0 ", 2,3 are allocated to ON during expression " 1 ", expression when " 2 " 1,2,4,5,7, position are allocated to ON, 1,2,3,4,7 is allocated to ON during expression " 3 ", expression when " 4 " 2,3,6,7, position are allocated to ON, 1,3,4,6,7 is allocated to ON during expression " 5 ", 1,3,4,5,6,7 is allocated to ON during expression " 6 ", 1,2,3 is allocated to ON during expression " 7 ", 1,2,3,4,5,6,7 is allocated to ON during expression " 8 ", and 1,2,3,4,6,7 is allocated to ON during expression " 9 ".
For introducing commodity concisely, as shown in Figure 1 and Figure 2, the trade name hurdle is arranged on housing face-plate of the present invention, can write down trade name in the vacancy; Hurdle, the place of production can write down the place of origin of commodity in the space of writing; Merchandise news can be introduced in the space of writing in the Commdity advertisement hurdle; There are four to represent LED seven segment digital tubes individual, ten, one hundred, thousand numerical digit respectively in the unit price hurdle; On housing top or the handled easily part seven sections code switchs of four decimal systems or bar shaped toggle switch are installed, they controlling respectively in the unit price hurdle, ten, one hundred, thousand 4-digit numbers.Radix point is represented angle, branch thereafter on the charactron (the 3rd reciprocal) of representation element.
When using the price screen, 6～9V direct supply is inserted supply hub, the state of seven sections code switchs of the decimal system or bar shaped toggle switch is set according to cargo price amount of money number:
For example when showing that certain commodity unit price is 1058 yuan, (by Fig. 1) is changed to 1 with seven sections code switch CODER1 of the decimal system, and CODER2 is changed to 0, and CODER 3 is changed to 5, and CODER4 is changed to 8, and the out of Memory of commodity can directly be write in related column and get final product.
Or (pressing Fig. 2) is with the 2nd, 3 of bar shaped toggle switch SW1, the the 1st, 2,3,4,5,6,8 of SW2, the the 1st, 3,4,7 of SW3, the 1st, 2,3,4,5,6,7 of SW4 is allocated to the ON state, and the out of Memory of commodity is directly write in related column and got final product.
All the other settings are analogized by above-mentioned.
Must (be total to anode and add positive voltage according to the suitable voltage that the polarity of charactron common port is determined to be added on the current-limiting resistance, common cathode adds negative voltage), the com of seven sections code switchs of four decimal system end also connects and joins with the power supply reference point, four drivers the GND end join with power cathode.
When the LED charactron size that adopts was big, the voltage drop of radix point just much smaller than the voltage drop of stroke section, was not burnt out for guaranteeing radix point, so should be connected in series a build-out resistor.
In the required power consumption of LED charactron hour, for reducing cost, also can directly in x end be held corresponding short circuit with out x in the circuit, the realization identical function without driver.
Also can determine with several LED seven segment digital tubes according to the demonstration size of unit price.
On price, seven sections code switchs of a decimal system (or bar shaped toggle switch) cost is below 1 yuan, if control a LED charactron, then need a single-chip microcomputer, an interface IC, a button at least with traditional decoder driver mode, in any case cost is far above the present invention.
Claims (3)
1. digital electronic price-indicating LED screen without CPU comprises: a shell body, trade name hurdle, hurdle, the place of production, unit price hurdle, product advertising hurdle are arranged on housing face-plate, seven sections code switchs of four decimal system or bar shaped toggle switch are installed in housing handled easily part, have four to show LED seven segment digital tubes individual, ten, one hundred, thousand unit currency respectively in the unit price hurdle;
It is characterized in that: each numerical digit, is controlled the numeral demonstration of one's own department or unit LED seven segment digital tubes through driver drives with seven sections code switchs of a decimal system; In1, in2, in3, in4, in5, in6, each the corresponding connection of in7 input end of a, the b of seven sections code switchs of the decimal system, c, d, e, f, g output terminal and driver; The corresponding connection of a, b, c, d, e, f, each section of g of the out1 of driver, out2, out3, out4, out5, out6, out7 output terminal and LED seven segment digital tubes; Common port phase and Lian Yuyi current-limiting resistance R1 one end of four LED seven segment digital tubes join, and the outer contact of the other end of resistance R 1 and supply hub joins; The com of seven sections code switchs of four decimal system end also connects and joins with the supply hub inner contact, four drivers the GND end join with power cathode; Represent the out8 end and build-out resistor R of radix point dp end and pairing driver of the LED seven segment digital tubes (LED2) of one hundred figure place
*Join, the in8 end of driver joins with the power supply reference point;
Of the present invention another is characterised in that: each numerical digit is used a SWDIP-8 bar shaped toggle switch, through driver drives, the numeral demonstration of one's own department or unit LED seven segment digital tubes is controlled; 16,15,14,13,12,11,10 ends of bar shaped toggle switch SW1, SW2, SW3, SW4 respectively with in1, in2, in3, in4, in5, in6, each the corresponding connection of in7 input end of U1, U2, U3, U4 driver, the in8 of U2 connects 9 ends of SW2; The corresponding connection of a, b, c, d, e, f, g, each section of dp of the out1 of driver U, out2, out3, out4, out5, out6, out7, out8 output terminal and each numerical digit LED seven segment digital tubes; The common port of four LED seven segment digital tubes mutually and Lian Yuyi current-limiting resistance R1 one end join, contact joins outside the other end of resistance R 1 and supply hub; 1,2,3,4,5,6,7,8 ends of U1, U2, U3, U4 driver and connecting with the supply hub inner contact join, and the GND end joins with power cathode; Represent one hundred figure place LED seven segment digital tubes (LED2) radix point dp end be connected in series a build-out resistor between the out8 of pairing driver holds.
2. according to claim 1: the LED charactron can be four also can not be four, the whole increase and decrease of display unit circuit, and method of attachment is identical.
3. according to claim 1: representing the out8 end of radix point dp end and pairing driver of the LED seven segment digital tubes of one hundred figure place can seal in a resistance when joining also can not crosstalk resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00124771 CN1343963A (en) | 2000-09-15 | 2000-09-15 | Digital electronic price-indicating LED screen without CPU |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00124771 CN1343963A (en) | 2000-09-15 | 2000-09-15 | Digital electronic price-indicating LED screen without CPU |
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| Publication Number | Publication Date |
|---|---|
| CN1343963A true CN1343963A (en) | 2002-04-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00124771 Pending CN1343963A (en) | 2000-09-15 | 2000-09-15 | Digital electronic price-indicating LED screen without CPU |
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| CN (1) | CN1343963A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100437674C (en) * | 2005-03-22 | 2008-11-26 | 杭州华三通信技术有限公司 | Method and apparatus for realizing multi-meaning display by seven segment digital tubes |
| CN102354248A (en) * | 2011-08-11 | 2012-02-15 | 乔双庆 | Current controller |
-
2000
- 2000-09-15 CN CN 00124771 patent/CN1343963A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100437674C (en) * | 2005-03-22 | 2008-11-26 | 杭州华三通信技术有限公司 | Method and apparatus for realizing multi-meaning display by seven segment digital tubes |
| CN102354248A (en) * | 2011-08-11 | 2012-02-15 | 乔双庆 | Current controller |
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| WD01 | Invention patent application deemed withdrawn after publication |