CN203311816U - Stereo advertisement screen - Google Patents
Stereo advertisement screen Download PDFInfo
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- CN203311816U CN203311816U CN201320403661XU CN201320403661U CN203311816U CN 203311816 U CN203311816 U CN 203311816U CN 201320403661X U CN201320403661X U CN 201320403661XU CN 201320403661 U CN201320403661 U CN 201320403661U CN 203311816 U CN203311816 U CN 203311816U
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Abstract
The utility model provides a stereo advertisement screen and relates to an advertisement screen. The stereo advertisement screen mainly solves a problem that a current plane advertisement screen fails to display stereo static or dynamic images. According to the utility model, the line drive signal output port of a single-chip microcomputer is connected with the line drive signal input port of a line drive; the line drive is used for driving LEDs in each line in an LED dot-matrix display screen to be turned on or off simultaneously; the row drive signal output port of the single-chip microcomputer is connected with the row drive signal input port of a row drive; the row drive is used for driving LEDs in each row in the LED dot-matrix display screen to be turned on or off simultaneously; the clock signal output port of a clock circuit is connected with the clock signal input port of the single-chip microcomputer; a power supply is used for providing working power for the line drive and the row drive simultaneously; and the line drive is achieved by use of a chip of the ST62726 model. The stereo advertisement screen is suitable for stereo advertisement display occasions.
Description
Technical field
The utility model relates to a kind of advertisement screen.
Background technology
The conventional planar display screen, static state or dynamic menu that can only display plane, and can't demonstrate three-dimensional static state or dynamic menu.
Summary of the invention
The present invention can't show three-dimensional static state or the problem of dynamic menu for what solve existing billboard screen, thereby a kind of tridimensional advertisement screen is provided.
The tridimensional advertisement screen, it comprises single-chip microcomputer, row driver, line driver, LED dot matrix display screen, clock circuit and power supply;
The row of described monolithic drive signal output part and are connected with the row driving signal input of row driver 2; Described row driver is lighted simultaneously or extinguishes for every row LED of driving LED dot matrix display screen; The horizontal-drive signal output terminal of described single-chip microcomputer is connected with the horizontal-drive signal input end of line driver; Described line driver is lighted simultaneously or extinguishes for every row LED of driving LED dot matrix display screen; The clock signal output terminal of clock circuit is connected with the clock signal input terminal of single-chip microcomputer; Power supply provides working power for row driver and line driver simultaneously; It is the chip realization of ST62726 that described row driver adopts model.
It also comprises reset circuit, and the reset signal output terminal of described reset circuit is connected with the reset signal input end of single-chip microcomputer.
Power supply is that output voltage is the direct supply of 5V.
It also comprises serial communication circuit, and the rs 232 serial interface signal output of described serial communication circuit or input end input or output end with the rs 232 serial interface signal of single-chip microcomputer and be connected.
The present invention is the LED light cube that can show three-dimensional pattern.This light cube can be as LED array display plane dynamically or tableaux, can also show three-dimensional static state or dynamic menu, be a kind of breakthrough that conventional planar is shown.And enriched the style shown, the effect of the figure strengthened, also can be widely used in actual applications various decorations shows, future display technique progress and the development in played guiding effect, light cube demonstration has more gorgeous visual effect than common plane LED array, and picture pattern has more selectivity.
The accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the circuit connection diagram of power supply;
Fig. 3 is the single-chip minimum system circuit diagram;
Fig. 4 is the clock circuit connection diagram;
Fig. 5 is by key level reset circuit connection diagram;
Fig. 6 is the circuit connection diagram of column drive circuit;
Fig. 7 is the circuit connection diagram of serial communication system;
Fig. 8 is LED light cube whole block diagram.
Embodiment
Embodiment one, in conjunction with Fig. 1, this embodiment is described, the tridimensional advertisement screen, it comprises single-chip microcomputer 1, row driver 2, line driver 3, LED dot matrix display screen 4, clock circuit 5 and power supply 7;
The row of described single-chip microcomputer 1 drive signal output part and are connected with the row driving signal input of row driver 2; Described row driver 2 is lighted simultaneously or extinguishes for every row LED of driving LED dot matrix display screen 4; The horizontal-drive signal output terminal of described single-chip microcomputer 1 is connected with the horizontal-drive signal input end of line driver 3; Described line driver 3 is lighted simultaneously or extinguishes for every row LED of driving LED dot matrix display screen 4; The clock signal output terminal of clock circuit 5 is connected with the clock signal input terminal of single-chip microcomputer 1; Power supply 7 provides working power for row driver 2 and line driver 3 simultaneously; It is the chip realization of ST62726 that described row driver 2 adopts model.
Principle of work: the objective of the invention is to produce the LED light cube that can show three-dimensional pattern.This light cube can be as LED array display plane dynamically or tableaux, can also show three-dimensional static state or dynamic menu, be a kind of breakthrough that conventional planar is shown.And enriched the style shown, the effect of the figure strengthened, also can be widely used in actual applications various decorations shows, future display technique progress and the development in played guiding effect, light cube demonstration has more gorgeous visual effect than common plane LED array, and picture pattern has more selectivity.
The present invention is that employing ATmaga16 single-chip microcomputer is core controller, and 16 bit LED constant-current driven chip ST62726, complete hardware circuit design.By software programming, control the demonstration that data download to single-chip microcomputer complete design pattern.
The light emitting diode cube that the present invention makes the three-dimensional of a 8*8*8 shows body, can realize the light on and off of each light emitting diode are controlled by coding, thereby can show diversified pattern.In order to attract spectators to strengthen display effect, plurality of display modes can be arranged.The simplest display mode is static the demonstration.Corresponding with static display mode, various dynamic display modes are just arranged, their shown picture and text all can change.Characteristics according to the picture and text motion can be divided into the plurality of display modes such as flicker, translation, rotation, convergent-divergent again.
3D LED light cube the general frame as shown in Figure 1.Circuit can be divided into core control circuit and display driver circuit substantially.Core control circuit partly comprises an ATmega16 and some peripheral circuits.This circuit part can be equivalent to a host computer in the middle of whole circuit, and it is responsible for controlling the operation of whole circuit and corresponding program, with the serial communication of PC and partly send order to display screen.Single-chip microcomputer is expanded rear drive 8X8X8LED light cube display screen according to the content write and instruction by the I/O mouth.This design will be take this scheme and will be that guiding theory launches concrete hardware circuit design.
When display circuit adopts dynamic scan mode to show, often show a row driver, the row of the same name of each row shares a line driver.By the capable gating signal that single-chip microcomputer provides, from first row, successively each row are carried out to sweep gate in order, according to the characteristic of latch, can latch output to data.So just can, the data output display of eight row, complete the transmission of column line data.The opposing party and, the data according to each row aspect will show, drive by triode the level that relay is controlled corresponding aspect, row with the data of aspect, be combined and jointly carry out display pattern.
Power circuit principle figure as shown in Figure 2.The 220V electric main is transformed into AC low-tension by power transformer; pass through again rectification and the filtering of bridge rectifier circuit and filter capacitor, at the Vin of fixed three terminal regulator LM7805 and GND two ends, form one not very galvanic current press (this voltage usually can be because of the fluctuation of line voltage or the variation of load etc. former thereby change).This DC voltage has just produced at the output terminal of stabilized voltage supply the VD that precision is high, degree of stability is good through the voltage stabilizing of LM7805 and the filtering of electric capacity.This stabilized voltage supply can be used as the power supply of TTL circuit or single chip circuit.Three terminal regulator is the general linear stabilized power supply integrated circuit of a kind of standardization, seriation, little with its volume, cost is low, performance good, functional reliability is high, use the characteristics such as simple and convenient, becomes a kind of one chip integrated voltage-stabilized device be most widely used in current stabilized voltage supply.In the TTL device circuitry, extensively adopt the controller of LM1805 three terminal regulator as power supply.
Clock circuit: the operation of each functional part of ATmega16 single-chip microcomputer all be take clock signal and is benchmark, without any confusion, a job with clapping.Therefore clock frequency directly affects the processing speed of single-chip microcomputer, and the quality of clock circuit is also the stability that directly affects Single Chip Microcomputer (SCM) system.Clock circuit commonly used has two kinds of modes, and a kind of is the internal clocking mode, and another kind is the external clock mode.This adopts the external clock mode.
ATmega16 singlechip chip inside is provided with an oscillator consisted of sign-changing amplifier, XTAL1 and XTAL2 be respectively oscillatory circuit input end and output terminal, clock can have inside or outside the generation, external timing element on XTAL1 and XTAL2 pin, internal oscillator circuit will produce self-sustained oscillation.The timing element that system adopts is the shunt-resonant circuit that quartz crystal and electric capacity form.Clock frequency fosc adopts 12MHZ, and the capacitance of C1, C2 is got 22pF, and the size of electric capacity plays the frequency micrometering.Clock circuit as shown in Figure 4.
Row (layer) driver adopts existing techniques in realizing.
Eight triggers of ST62726 are edging trigger D flip-flops.Just beating of clock, Q output will be in the logic state that the D input end has been set up.The tristate bus line driver output, put the delayed action that several full parallel accesses, the input of buffering control inputs, clock are improved immunity to interference.Schmidt trigger buffering input on clock line will be simplified system, because the Input Hysteresis effect makes the AC and DC immunity to interference generally improve 400mV.The control inputs of Buffer output will make eight outputs be in normal condition (high level or low level) or be in high-impedance state.Under high-impedance state, output can not be given the bus loading effectively, can not effectively drive bus.The internal work that does not affect trigger is controlled in output, and both old data can keep, and even when exporting, is closed, and new data also can be inserted.The logic function of ST62726 is in Table 3.1.
When the OC in eight D-latch ST62726 allowed control end OE to be low level when tri-state, 00～07 was the normal logic state, can be used to drive load or bus.
The logic function table of table 174LS574
Annotate: H=high level, L=low level, x=are indefinite, the Z=high-impedance state, ↑=rising edge, Q0=original state.
Making and the principle of work introduction of light cube in present embodiment:
3D LED light cube overlap joint
(1) LED Component selection
3D8 light cube adopts high sapphirine straw hat head LED.In design, LED can be replaced by other models, only need meet the following conditions:
1) nominal drive voltage 3.3v (2.7v-3.8v).
2) nominal drive current is 20mA.
3) anode pin length 27 ± 1mm, negative electrode pin length is 25 ± 1mm.
(2) LED luminance test method
1) can use the anode negative electrode of the dry cell judgement LED of the common 1.5V of two joints.
2) omnipotent bread board is switched on power, in a pair of jack of LED inserting surface wrapper sheet, whether wherein submarginal is anode, another is negative electrode, observe it and can normally be lighted, and can change current-limiting resistance change brightness, the brightness range surveyed of observing this type LED.Suggestion, from minimum brightness, prevents that LED from being burnt.
(3) LED light cube bridging method
In order to keep whole permeability, stereoscopic sensation, 3D8 light cube does not design extra LED support, and all overlap joints are directly used the pin of LED self.
1) horizontal bending: the substantially free-hand unification that just can guarantee the regularity of welding and guarantee angle.
2) vertical bending: can be by nose pliers, purpose is to allow negative electrode show one one of luminophor, and it can be overlapped by the LED upper and lower with it.
(4) by putting to line
Prepare a plank, stamp 64 holes of 8x8 in the above, be evenly distributed, its spacing is 22.86mm, and aperture is as the criterion with cooperated with LED.After LED insertion one socket that bending is good entered, its anode just in time can overlap.Weld, realize the operation of the capable interior common anode of line.
(5) by line to face
The LED one by one welded is lain low in the plane, realize the welding of Shu Fangxiang negative electrode.The position of top LED and below LED negative electrode overlap joint, the projection of available LED self root as a token of.Key-course and interlamellar spacing, ideal value are still 22.86 (2.54*9) mm.
(6) by face to body
Vertical each face is inserted into above bread board successively, after, the anode pin that will expose is laterally rolled over 90 °, is that it can weld with the anode of sustained heights (same layer) before and after it, realizes the layer common anode on each 8x8 plane.After realizing layer common anode, we have just obtained amounting to 8 antianode lead-in wires, by enamel covered wire, realize the anode line of each layer and being connected of mainboard.The anode seat of the most close DC supply socket of correspondence of top layer wherein.
(7) static test
Carry out the static test of LED, inner Chang Liangdian, normal dim spot are changed.Due to still more enervated element of LED, in welding process, should avoid static to cause the damage of LED.Preferably use the electrostatic prevention welding stage, and wear anti-electrostatic wrist ring.Have hardware to make basic friend, can make the module of a simple single face test, by crocodile clip, in opposite, each point is tested, thereby avoids all realizing after common anode connects therefrom splitting out indivedual bad points at each layer again.With regard to schematic diagram, the LED of 3D8 overlap joint result is relatively simple, and 512 LED are divided into 64 bundles, and 8 layers, common cathode in bundle, common anode in layer.
3D LED light cube principle of work
The design introduces the making of a 3D LED light cube display screen, at the P0 of single-chip microcomputer mouth output display code, then selects the scanning sheet latch to send into ST62726, selects the chip which row is corresponding just can deliver to the display screen demonstration to the content shown by sheet.Consider that the P0 mouth must arrange pull-up resistor, we adopt 4.7k Ω row resistance as pull-up resistor.Whole block diagram 8.
Design concept: utilize monolithic to control principle and control technology that the LED dot matrix shows, make and control light cube demonstration.By coding, control the demonstration of different LED, show content to display.According to the visual persistence effect of human eye, present dynamically continuous a series of pictures the time delay that every width picture is set.Finally reach content to display.Each lamp is by layer control end and the row control end is common determines bright or goes out.
In three-dimensional light cube, adopt dynamic scan to show, this display mode has been utilized the eye storage characteristic of human eye dexterously.Continuous a few frame pictures circulation is at a high speed shown, need only frame rate higher than 24 frames/second, the people glances up complete, a relatively static picture.Most typical example is exactly film projector.In electronic applications, because this dynamic scan display mode has been reduced the signal wire quantity of luminescence unit greatly, therefore in the LED display technique, be widely used.Now simply describe the mode shown with dynamic scan, show the process of character " B ".
The difference of the described tridimensional advertisement of embodiment two, this embodiment and embodiment one screen is, it also comprises reset circuit 6, and the reset signal output terminal of described reset circuit 6 is connected with the reset signal input end of single-chip microcomputer 1.
Reset circuit: the ATmega16 single-chip microcomputer need to reset when starting operation or while occurring crashing, and makes CPU and other functional parts be in a definite original state, and PC is initialized as 0000H.Single-chip microcomputer starts executive routine from this state.Except the normal initialization of the system of entering, when program line is made mistakes (as program " race flies ") or operating mistake while making system be in " deadlock " state, also needing by reset key is that the RST pin is high level, makes ATmega16 break away from " race flies " " deadlock " state and restart routine.
Single-chip microcomputer has multiple reset mode, and reset operation commonly used has electrification reset and manually by the key level reset mode.The design adopts the electrification reset mode, and circuit is built figure as shown in Figure 5.Electrification reset: reset circuit is comprised of two parts, electric capacity and resistance.The upper voltage of VCC grows out of nothing and can first be in high level a period of time at the RESET place when system is switched on, then due to this by resistance eutral grounding the level that should put of RESET can change into gradually low level, thereby make monolithic processor resetting mouth level from 1 to 0, reach the function to monolithic processor resetting.A kind of like this reset mode is exactly so-called electrification reset.
The difference of the described tridimensional advertisement of embodiment three, this embodiment and embodiment one or two screen is, power supply 7 is the direct supply of 5V for output voltage.
The difference of the described tridimensional advertisement screen of embodiment four, this embodiment and embodiment three is, it also comprises serial communication circuit, and the rs 232 serial interface signal output of described serial communication circuit or input end input or output end with the rs 232 serial interface signal of single-chip microcomputer 1 and be connected.
Data between computing machine and computing machine or computing machine and terminal transmit can adopt serial communication and two kinds of modes of parallel communication.Because serial communication mode has, use that circuit is few, cost is low, particularly when remote transmission, avoided the inconsistent of many line characteristics and be widely adopted.RS-232C standard to be U.S. EIA (Electronic Industries Association) develop together with the company such as BELL the communication protocol of announcing in 1969.It is suitable for the communication of message transmission rate in 0～20000b/s scope.The relevant issues of this standard to serial communication interface, all make explicit provisions as signal wire function, the opering characteristic of electric apparatus.Due to the communication facilities of current instrument factory commercial city production with the RS-232C multiple display modes compatible, therefore, it extensively adopts at present as a kind of standard in microcomputer communication interface.
The ATmega16 single-chip microcomputer has full duplex serial UART passage, supports single-chip microcomputer to carry out the serial communication transmission of data.Except single-chip microcomputer, to formulate communication protocol with PC, determine that the problem that transmission rate also needs to solve is exactly signal level problem outward.The RS-232C standard code PC send data bus TXD and receive data bus RXD and adopt the EIA level, the level while namely transmitting numeral " 1 " on transmission line-3～-15V between; While transmitting digital " 0 ", the level on transmission line is between+3～+ 15.But serial port of single chip computer adopts the positive logic Transistor-Transistor Logic level, during numeral " 1 " be namely+during the 5V digital " 0 " be-5V, so single-chip microcomputer can not directly be connected and communicate and RS-232C and Transistor-Transistor Logic level must be carried out changing by chip with computing machine.Serial communication system level shifting circuit figure as shown in Figure 7.
The chip of MAX232 series is high with integrated level in general level transferring chip, and list+5V power work only needs external 5 little electric capacity can complete converted between RS-232C and Transistor-Transistor Logic level and is the conventional chip in Single Chip Microcomputer (SCM) system.This circuit is for test procedure, and the modification of system software.The program of native system software programming can be directly by the serial port of PC, then downloads in single-chip microcomputer through the MAX232 level conversion, thereby goes to carry out corresponding function.In this display system, MAX232 is most important hardware composition part in communication system.
Claims (4)
1. tridimensional advertisement shields, and it is characterized in that: it comprises single-chip microcomputer (1), row driver (2), line driver (3), LED dot matrix display screen (4), clock circuit (5) and power supply (7);
The row of described single-chip microcomputer (1) drive signal output part and are connected with the row driving signal input of row driver (2); Described row driver (2) is lighted simultaneously or extinguishes for every row LED of driving LED dot matrix display screen (4); The horizontal-drive signal output terminal of described single-chip microcomputer (1) is connected with the horizontal-drive signal input end of line driver (3); Described line driver (3) is lighted simultaneously or extinguishes for every row LED of driving LED dot matrix display screen (4); The clock signal output terminal of clock circuit (5) is connected with the clock signal input terminal of single-chip microcomputer (1); Power supply (7) provides working power for row driver (2) and line driver (3) simultaneously; It is the chip realization of ST62726 that described row driver (2) adopts model.
2. tridimensional advertisement screen according to claim 1, is characterized in that it also comprises reset circuit (6), and the reset signal output terminal of described reset circuit (6) is connected with the reset signal input end of single-chip microcomputer (1).
3. tridimensional advertisement screen according to claim 1 and 2, is characterized in that power supply (7) is the direct supply of 5V for output voltage.
4. tridimensional advertisement screen according to claim 3, is characterized in that it also comprises serial communication circuit, and the rs 232 serial interface signal output of described serial communication circuit or input end input or output end with the rs 232 serial interface signal of single-chip microcomputer (1) and be connected.
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| CN201320403661XU CN203311816U (en) | 2013-07-09 | 2013-07-09 | Stereo advertisement screen |
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| CN201320403661XU CN203311816U (en) | 2013-07-09 | 2013-07-09 | Stereo advertisement screen |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104733043A (en) * | 2013-12-18 | 2015-06-24 | 西安信唯信息科技有限公司 | Three-dimensional pattern display apparatus capable of dynamically programming |
| CN104795024A (en) * | 2015-04-17 | 2015-07-22 | 广州格靓光电科技有限公司 | Dynamic lattice control method and device |
| CN105910006A (en) * | 2016-04-24 | 2016-08-31 | 管存忠 | Desk lamp |
| CN106066404A (en) * | 2016-07-01 | 2016-11-02 | 中南民族大学 | A kind of enzyme mark microwell plate loading instruction control system and control method |
| CN107403603A (en) * | 2017-09-22 | 2017-11-28 | 深圳市云智科技有限公司 | LED scans the control circuit of display screen |
-
2013
- 2013-07-09 CN CN201320403661XU patent/CN203311816U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104733043A (en) * | 2013-12-18 | 2015-06-24 | 西安信唯信息科技有限公司 | Three-dimensional pattern display apparatus capable of dynamically programming |
| CN104795024A (en) * | 2015-04-17 | 2015-07-22 | 广州格靓光电科技有限公司 | Dynamic lattice control method and device |
| CN105910006A (en) * | 2016-04-24 | 2016-08-31 | 管存忠 | Desk lamp |
| CN106066404A (en) * | 2016-07-01 | 2016-11-02 | 中南民族大学 | A kind of enzyme mark microwell plate loading instruction control system and control method |
| CN107403603A (en) * | 2017-09-22 | 2017-11-28 | 深圳市云智科技有限公司 | LED scans the control circuit of display screen |
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Granted publication date: 20131127 Termination date: 20150709 |
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