CN208848525U

CN208848525U - LED display

Info

Publication number: CN208848525U
Application number: CN201821507876.5U
Authority: CN
Inventors: 马利平; 赵欣
Original assignee: SHANGHAI ZHONGQIAO COLLEGE
Current assignee: Shanghai Zhongqiao College; Zeta Group
Priority date: 2018-09-14
Filing date: 2018-09-14
Publication date: 2019-05-10
Anticipated expiration: 2028-09-14

Abstract

The utility model LED display, comprising: pedestal；LED indication mechanism, LED indication mechanism are set on the base；Control circuit board, control circuit board are arranged in pedestal, and the integral control circuit in control circuit board, LED indication mechanism connects to the control circuit；Clock circuit, line-scanning drive circuit and the column scan driving circuit that control circuit includes at least master controller U1 and connect respectively with master controller U1；Wherein clock circuit includes: first capacitor C1, and one end of first capacitor C1 is connect with the XTAL1 pin of master controller U1, the other end ground connection of first capacitor C1；Second capacitor C2, one end of the second capacitor C2 are connect with the XTAL2 pin of master controller U1, the other end ground connection of the second capacitor C2；Crystal oscillator, one end of crystal oscillator are connect with the XTAL1 pin of master controller U1, and the other end of crystal oscillator is connect with the XTAL12 pin of master controller U1.Compared with prior art, the beneficial effects of the utility model are as follows: structure is simple, maintains easily, and cost is relatively low.

Description

LED display

Technical field

The utility model belongs to technical field of electricity, especially a kind of LED display.

Background technique

The 1990s LED technology rapid progress, being not only luminous efficiency has been more than incandescent lamp, and light intensity has reached candle Lighting level, and color also covers entire limit of visible spectrum from red to blue, it is this from indicator light level to more than general The technological revolution of light source levels leads to various new applications, such as automobile signal light, traffic lights, outdoor panchromatic large-scale display Screen and special lighting source.

Light emitting diode applicable cases:

With the progress of LED high brightness and multicolor, application field also constantly extends.From following lower light The indicator light of flux is to display screen, then from outdoor display screen to the white light light of medium luminous flux power signal lamp and special lighting The high light flux general illumination light source in the upper right corner is finally developed in source.It is within 2000 the line of demarcation of time.It has been solved in 2000 The signal display problem and lamp decoration problem of all colours, and started the special lighting application of low, middle luminous flux, and as general The high light flux white-light illuminating application of illumination, it appears that need time, need to further increase substantially luminous flux can realize. Certainly, this is also a process, can decline with brightness raising and price and be done step-by-step.

1) LED display

From mid-term the 1980s, just there is monochromatic and multicolor displaying screen to come out, initially text screen or animation screen.90 years In generation, is first, the development of electronic computer technology and integrated circuit technique, so that the video technique of LED display is achieved, TV The directly upper screen of image, especially the mid-90, blue and green ultra-high brightness LED are succeeded in developing and are gone into operation rapidly, and outdoor is made The application of screen greatly expands, and area is differed in 100-300m.LED display is in stadiums, square, meeting-place even street at present Road, market all have been widely used, and Nasdaq's full-color screen on Times Square is the most well-known, and panel product is 120 feet × 90 feet, it is equivalent to 1005m, is made of 19,000,000 superelevation brilliant blues, green, red LED.In addition, in quotation screen, bank Exchange rate screen, interest rate screen etc. application also account for larger proportion, in the recent period highway, overpass information screen in terms of also have compared with Big development.Light emitting diode this field application on a large scale, form new industry, and more stable increasing can be expected to have It is long.

2) traffic lights

Navigation light makees light source existing many years using LED, and current work is improve and perfect.Road traffic signal lamp is closely several Significant progress is achieved over year, and technology development is very fast, application development is swift and violent, and China there are 40,000 sets or so to order every year at present It is single, and California, USA has just replaced the signal lamp of 50,000 sets of conventional light sources within the whole of last year with LED traffic signal lamp, according to making It is seen with effect, service life length, power saving and non-maintaining effect are apparent.It is at present red using the peak luminous wavelength of LED 630nm, yellow 590nm, green 505nm.It is excessive that the problem of should paying attention to, is that driving current is not answered, otherwise the height under summer sunlight Warm condition will will affect the service life of LED.

Recently, the airport the LED special signal lamp applied to airport as beacon light, Projecting Lamp and omnidirectional light has also succeeded And come into operation, it is multi-party to reflect that effect is fine.It has independent intellectual property right, is approved two patents, and good reliability is saved and used Electricity, it is non-maintaining, various airports can be promoted the use of, substitution has continued to use the old signal lamp of decades, and not only brightness is high, but also due to LED light high color purity, it is especially distinct, it is easy to signal identification.

The signal lamp of railway is more due to kind series, it is desirable that light intensity and visual angle are also different, just step up to grind at present In system, estimation can gradually succeed in developing and investment application successively, in terms of quantity and a quite big market.

3) lamps for vehicle

Ultra-bright LED can be made the brake lamp, taillight and indicator of automobile, it can also be used to dial illumination and interior photograph Bright, it in vibration resistance, power saving and has apparent advantage than incandescent lamp in terms of the long-life.As brake lamp, its response time is 60ns, it is more much shorter than the 140ms of incandescent lamp, in typical running on expressway, it will increase the safe distance of 4-6m.

4) liquid crystal screen backlight

Backlight of the LED as liquid crystal display, it can be used as green, red, blue, white, is also used as becoming Color backlight enters production and application stage there are many product.Recently, liquid crystal display LED production backlight on mobile phone, The class of product is improved, effect is fine.Using 15in made of 8 blues, 24 greens, 32 red Luxeon LED The backlight of (1in ≈ 2.5cm) liquid crystal display can reach 120W, 2500lm, brightness 18000nits (nit, cd/m2).22 liquid crystal Screen back light source has also been made, and only 6mm is thick, and not only color blending effect is good, and colour rendering index also reaches 80 or more.Large size backlight at present Though being in the development phase, potentiality are very big.

5) lamp decoration

Due to the raising of light-emitting diode luminance and the decline of price, along with long-life, economize on electricity, driving and control are compared with secondary rainbow Rainbow lamp is simple, can not only flash, moreover it is possible to change colour, so the Column being luminous for monochrome, polychrome or even the discoloration being made into ultra-high brightness LED It is equipped with the assorted luminescence unit of other shapes, the landscape engineerings effects such as decoration high-lager building, bridge, street and square are fine, The scene of one riotous with colour, stellar scintillation and streamer extraordinary splendor is presented.Have many production of units LED light columns and reach myriametre or more, It color lamp tens of thousands of, just gradually promotes at present, estimation, which can gradually expand, independently forms a kind of industry.

6) lighting source

LED light source as lighting source should be white light, and white LED light source classification is shone currently as military white light LEDs Bright lamp tool has some kind investment batch productions.Since LED light source is without infra-red radiation, convenient for hidden, along with it also has Vibration resistance, be suitable for storage battery power supply, structure solid and it is easy to carry the advantages that, will be had in terms of special lighting light source compared with Great development.As the civil Lawn lamp used, underground lamp have large-scale production, also have as microscopic fields of view illumination, flashlight, outside The illumination and reading desk lamp of the head lamp of section doctor, museum or exhibition of paintings.With the raising of luminous flux and the decline of price, application Face will gradually be expanded, and to complete transition of the special lighting to general illumination, can enter general illumination within estimation 2005-2010 years and lead Domain.

LED is applied in terms of lamp decoration, structure is complicated for current LED light decorations, it is not easy to safeguard.

Utility model content

For the defects in the prior art, the purpose of the utility model is to provide a kind of LED displays.

In order to solve the above technical problems, the utility model LED display, comprising: pedestal；

LED indication mechanism, the LED indication mechanism setting is on the base；

Control circuit board, the control circuit board are arranged in the pedestal, the integrated control in the control circuit board Circuit, the LED indication mechanism are connect with the control circuit；

The control circuit include at least master controller U1 and connect respectively with the master controller U1 clock circuit, Line-scanning drive circuit and column scan driving circuit；Wherein

The clock circuit includes:

First capacitor C1, one end of the first capacitor C1 are connect with the XTAL1 pin of the master controller U1, and described The other end of one capacitor C1 is grounded；

Second capacitor C2, one end of the second capacitor C2 are connect with the XTAL2 pin of the master controller U1, and described The other end of two capacitor C2 is grounded；

Crystal oscillator, one end of the crystal oscillator are connect with the XTAL1 pin of the master controller U1, the other end of the crystal oscillator with The XTAL12 pin of the master controller U1 connects.

Preferably, the line-scanning drive circuit includes:

The Ds pin of the first row drive control device U10, the first row drive control device U10 are with the master controller U1's The connection of P2.3 pin, the first row drive control device U10'sPin is connect with the P2.4 pin of the master controller U1, institute The STcp pin for stating the first row drive control device U10 is connect with the P2.5 pin of the master controller U1, the first row driving The SHcp pin of controller U10 is connect with the P2.6 pin of the master controller U1；

The Ds pin of second row drive control device U11, the second row drive control device U11 and the first row driving are controlled The QT pin of device U10 processed connects, the second row drive control device U11'sThe P2.2 pin of pin and the master controller U1 Connection, the STcp pin of the second row drive control device U11 are connect with the P2.5 pin of the master controller U1, and described second The SHcp pin of row drive control device U11 is connect with the P2.6 pin of the master controller U1；

The Ds pin of the third line drive control device U12, the third line drive control device U12 and second row driving are controlled The QT pin of device U11 processed connects, the third line drive control device U12'sThe P3.6 pin of pin and the master controller U1 Connection, the STcp pin of the third line drive control device U12 are connect with the P2.5 pin of the master controller U1, the third The SHcp pin of row drive control device U12 is connect with the P2.6 pin of the master controller U1.

Preferably, the column scan driving circuit includes:

The Ds pin of first row drive control device U2, the first row drive control device U2 are with the master controller U1's The connection of P3.5 pin, the STcp pin of the first row drive control device U2 are connect with the P3.3 pin of the master controller U1, The SHcp pin of the first row drive control device U2 is connect with the P3.4 pin of the master controller U1；

The Ds pin of secondary series drive control device U3, the secondary series drive control device U3 and the first row drive control The QT pin of device U2 connects, and the STcp pin of the secondary series drive control device U3 and the P3.3 pin of the master controller U1 connect It connects, the SHcp pin of the secondary series drive control device U3 is connect with the P3.4 pin of the master controller U1；

The Ds pin of third column drive control device U4, the third column drive control device U4 and the secondary series drive control The QT pin of device U3 connects, and the STcp pin of the third column drive control device U4 and the P3.3 pin of the master controller U1 connect It connects, the SHcp pin of the third column drive control device U4 is connect with the P3.4 pin of the master controller U1；

The Ds pin of 4th column drive control device U5, the 4th column drive control device U5 and the third column drive control The QT pin of device U4 connects, and the STcp pin of the 4th column drive control device U5 and the P3.3 pin of the master controller U1 connect It connects, the SHcp pin of the 4th column drive control device U5 is connect with the P3.4 pin of the master controller U1；

The Ds pin of 5th column drive control device U6, the 5th column drive control device U6 and the 4th column drive control The QT pin of device U5 connects, and the STcp pin of the 5th column drive control device U6 and the P3.3 pin of the master controller U1 connect It connects, the SHcp pin of the 5th column drive control device U6 is connect with the P3.4 pin of the master controller U1；

The Ds pin of 6th column drive control device U7, the 6th column drive control device U7 and the 5th column drive control The QT pin of device U6 connects, and the STcp pin of the 6th column drive control device U7 and the P3.3 pin of the master controller U1 connect It connects, the SHcp pin of the 6th column drive control device U7 is connect with the P3.4 pin of the master controller U1；

The Ds pin of 7th column drive control device U8, the 7th column drive control device U8 and the 6th column drive control The QT pin of device U7 connects, and the STcp pin of the 7th column drive control device U8 and the P3.3 pin of the master controller U1 connect It connects, the SHcp pin of the 7th column drive control device U8 is connect with the P3.4 pin of the master controller U1；

The Ds pin of 8th column drive control device U9, the 8th column drive control device U9 and the 7th column drive control The QT pin of device U8 connects, and the STcp pin of the 8th column drive control device U9 and the P3.3 pin of the master controller U1 connect It connects, the SHcp pin of the 8th column drive control device U9 is connect with the P3.4 pin of the master controller U1.

It preferably, further include amplifying circuit, the amplifying circuit includes:

No. 2 pins and No. 4 pins of amplification controller U13, the amplification controller U13 respectively with the master controller U1 P4.3 pin connection；

First adjusts unit, and described first adjusts No. 5~No. 8 pins of unit and the amplification controller U13 and described The connection of LED indication mechanism；

Second adjusts unit, and described second adjusts No. 5~No. 8 pins of unit and the amplification controller U13 and described The connection of LED indication mechanism；

Third adjusts unit, and the third adjusts No. 5~No. 8 pins of unit and the amplification controller U13 and described The connection of LED indication mechanism.

Preferably, the first adjusting unit includes eight adjusting components, and the adjusting component includes:

No. 5~No. 8 of first PNP triode, the emitter of first PNP triode and the amplification controller U13 Pin and LED indication mechanism connection；The collector of first PNP triode is connect with the LED indication mechanism；It is described The base stage of first PNP triode is connect with the LED indication mechanism；In the base stage and described first of first PNP triode First resistor R1 is connected between the emitter of PNP triode.

Preferably, the second adjusting unit includes eight adjusting components, and the adjusting component includes:

No. 5~No. 8 of second PNP triode, the emitter of second PNP triode and the amplification controller U13 Pin and LED indication mechanism connection；The collector of second PNP triode is connect with the LED indication mechanism；It is described The base stage of second PNP triode is connect with the LED indication mechanism；In the base stage and described second of second PNP triode Second resistance R2 is connected between the emitter of PNP triode.

Preferably, it includes eight adjusting components that the third, which adjusts unit, and the adjusting component includes:

No. 5~No. 8 of third PNP triode, the emitter of the third PNP triode and the amplification controller U13 Pin and LED indication mechanism connection；The collector of the third PNP triode is connect with the LED indication mechanism；It is described The base stage of third PNP triode is connect with the LED indication mechanism；In the base stage and the third of the third PNP triode 3rd resistor R is connected between the emitter of PNP triode.

Preferably, the first adjusting diode D1, the second adjusting diode D2 and third adjust diode D3 and are connected on power supply Unit, the second adjusting unit and third is adjusted with described first to adjust between unit.

Preferably, the model STC12C5A60S2 of the master controller U1；The first row drive control device U10~the The model 74HC595 of three row drive control device U12；The first row drive control device U2~the 8th column drive control device The model 74HC595 of U9；The model 74HC4953 of the amplification controller U13.

A kind of LED display, comprising:

Pedestal；

The clock circuit includes:

Crystal oscillator, one end of the crystal oscillator are connect with the XTAL1 pin of the master controller U1, the other end of the crystal oscillator with The XTAL12 pin of the master controller U1 connects；

The line-scanning drive circuit includes:

The Ds pin of the third line drive control device U12, the third line drive control device U12 and second row driving are controlled The QT pin of device U11 processed connects, the third line drive control device U12'sThe P3.6 pin of pin and the master controller U1 Connection, the STcp pin of the third line drive control device U12 are connect with the P2.5 pin of the master controller U1, the third The SHcp pin of row drive control device U12 is connect with the P2.6 pin of the master controller U1；

The column scan driving circuit includes:

The Ds pin of 8th column drive control device U9, the 8th column drive control device U9 and the 7th column drive control The QT pin of device U8 connects, and the STcp pin of the 8th column drive control device U9 and the P3.3 pin of the master controller U1 connect It connects, the SHcp pin of the 8th column drive control device U9 is connect with the P3.4 pin of the master controller U1；

It further include amplifying circuit, the amplifying circuit includes:

Third adjusts unit, and the third adjusts No. 5~No. 8 pins of unit and the amplification controller U13 and described The connection of LED indication mechanism；

Described first, which adjusts unit, includes eight adjusting components, and the adjusting component includes:

No. 5~No. 8 of first PNP triode, the emitter of first PNP triode and the amplification controller U13 Pin and LED indication mechanism connection；The collector of first PNP triode is connect with the LED indication mechanism；It is described The base stage of first PNP triode is connect with the LED indication mechanism；In the base stage and described first of first PNP triode First resistor R1 is connected between the emitter of PNP triode；

Described second, which adjusts unit, includes eight adjusting components, and the adjusting component includes:

No. 5~No. 8 of second PNP triode, the emitter of second PNP triode and the amplification controller U13 Pin and LED indication mechanism connection；The collector of second PNP triode is connect with the LED indication mechanism；It is described The base stage of second PNP triode is connect with the LED indication mechanism；In the base stage and described second of second PNP triode Second resistance R2 is connected between the emitter of PNP triode；

It includes eight adjusting components that the third, which adjusts unit, and the adjusting component includes:

No. 5~No. 8 of third PNP triode, the emitter of the third PNP triode and the amplification controller U13 Pin and LED indication mechanism connection；The collector of the third PNP triode is connect with the LED indication mechanism；It is described The base stage of third PNP triode is connect with the LED indication mechanism；In the base stage and the third of the third PNP triode 3rd resistor R is connected between the emitter of PNP triode；

First adjusting diode D1, the second adjusting diode D2 and third adjust diode D3 and are connected on power supply and described the One, which adjusts unit, the second adjusting unit and third, is adjusted between unit；

The model STC12C5A60S2 of the master controller U1；The first row drive control device U10~the third line drives The model 74HC595 of movement controller U12；The first row drive control device U2~the 8th column drive control device U9 type Number be 74HC595；The model 74HC4953 of the amplification controller U13.

Compared with prior art, the beneficial effects of the utility model are as follows:

1) structure is simple, maintains easily, and cost is relatively low.

Battery monitoring device provided by the utility model is a kind of entity hardware platform, based on the further of the utility model It improves, such as structure is improved or method is improved, and can contribute to implement function such as:

2) the luminous of LED can be controlled by the mode of infrared remote control, it is made to show different lighting effects.

Detailed description of the invention

Upon reading the detailed description of non-limiting embodiments with reference to the following drawings, other spies of the utility model Sign objects and advantages will become more apparent upon.

Fig. 1 is the utility model LED display structural schematic diagram；

Fig. 2 is the utility model LED display LED indication mechanism LED unit connection schematic diagram；

Fig. 3 is one structural schematic diagram of the utility model LED display LED indication mechanism embodiment；

Fig. 4 is one structural schematic diagram of the utility model LED display LED indication mechanism embodiment；

Fig. 5 is the utility model LED display main controller circuit functional block diagram；

Fig. 6 is the utility model LED display line-scanning drive circuit functional block diagram；

Fig. 7 is the utility model LED display column scan driving circuit principle block diagram；

Fig. 8 is the utility model LED display amplifying circuit functional block diagram；

Fig. 9 is the utility model LED display key circuit functional block diagram；

Figure 10 is the utility model LED display electric power management circuit functional block diagram；

Figure 11 is the utility model LED display wifi expansion interface circuit functional block diagram；

Figure 12 is the utility model LED display blue-teeth data transparent transmission schematic block circuit diagram；

Figure 13 is frequency switch circuit functional block diagram inside and outside the utility model LED display；

Figure 14 is the utility model LED display downloader schematic block circuit diagram.

Specific embodiment

The utility model is described in detail combined with specific embodiments below.Following embodiment will be helpful to this field Technical staff further understands the utility model, but does not limit the utility model in any form.It should be pointed out that ability For the those of ordinary skill in domain, without departing from the concept of the premise utility, several changes and improvements can also be made. These are all within the protection scope of the present invention.

As shown in Fig. 1~Figure 14, the utility model LED display, pedestal 1；

LED indication mechanism 2 (is made of) LED unit 3, and LED indication mechanism 2 (being made of LED unit 3) is arranged in pedestal 1 On；

Control circuit board, control circuit board are arranged in pedestal 1, and the integral control circuit in control circuit board, LED is shown Mechanism 2 (being made of LED unit 3) connects to the control circuit；

Control circuit includes at least master controller U1 and the clock circuit connecting respectively with master controller U1, row scanning drive Dynamic circuit and column scan driving circuit；Wherein

Clock circuit includes:

One end of first capacitor C1, first capacitor C1 are connect with the XTAL1 pin of master controller U1, and first capacitor C1's is another One end ground connection；

Second capacitor C2, one end of the second capacitor C2 are connect with the XTAL2 pin of master controller U1, and the second capacitor C2's is another One end ground connection；

Crystal oscillator, one end of crystal oscillator are connect with the XTAL1 pin of master controller U1, and the other end of crystal oscillator is with master controller U1's The connection of XTAL12 pin；

Line-scanning drive circuit includes:

The Ds pin of the first row drive control device U10, the first row drive control device U10 and the P2.3 pin of master controller U1 Connection, the first row drive control device U10'sPin is connect with the P2.4 pin of master controller U1, the first row drive control device The STcp pin of U10 is connect with the P2.5 pin of master controller U1, the SHcp pin of the first row drive control device U10 and main control The P2.6 pin of device U1 connects；

The Ds pin and the first row drive control device U10 of second row drive control device U11, the second row drive control device U11 QT pin connection, the second row drive control device U11'sPin is connect with the P2.2 pin of master controller U1, the driving of the second row The STcp pin of controller U11 is connect with the P2.5 pin of master controller U1, the SHcp pin of the second row drive control device U11 with The P2.6 pin of master controller U1 connects；

The third line drive control device U12, the Ds pin of the third line drive control device U12 and the second row drive control device U11 QT pin connection, the third line drive control device U12'sPin is connect with the P3.6 pin of master controller U1, the third line driving The STcp pin of controller U12 is connect with the P2.5 pin of master controller U1, the SHcp pin of the third line drive control device U12 with The P2.6 pin of master controller U1 connects；

Column scan driving circuit includes:

The Ds pin of first row drive control device U2, first row drive control device U2 and the P3.5 pin of master controller U1 connect It connects, the STcp pin of first row drive control device U2 is connect with the P3.3 pin of master controller U1, first row drive control device U2 SHcp pin connect with the P3.4 pin of master controller U1；

The Ds pin of secondary series drive control device U3, secondary series drive control device U3 and the QT of first row drive control device U2 Pin connection, the STcp pin of secondary series drive control device U3 are connect with the P3.3 pin of master controller U1, secondary series driving control The SHcp pin of device U3 processed is connect with the P3.4 pin of master controller U1；

The Ds pin of third column drive control device U4, third column drive control device U4 and the QT of secondary series drive control device U3 Pin connection, the STcp pin of third column drive control device U4 are connect with the P3.3 pin of master controller U1, third column driving control The SHcp pin of device U4 processed is connect with the P3.4 pin of master controller U1；

The Ds pin of 4th column drive control device U5, the 4th column drive control device U5 and the QT of third column drive control device U4 Pin connection, the STcp pin of the 4th column drive control device U5 are connect with the P3.3 pin of master controller U1, the 4th column driving control The SHcp pin of device U5 processed is connect with the P3.4 pin of master controller U1；

5th column drive control device U6, the Ds pin of the 5th column drive control device U6 and the QT of the 4th column drive control device U5 Pin connection, the STcp pin of the 5th column drive control device U6 are connect with the P3.3 pin of master controller U1, the 5th column driving control The SHcp pin of device U6 processed is connect with the P3.4 pin of master controller U1；

6th column drive control device U7, the Ds pin of the 6th column drive control device U7 and the QT of the 5th column drive control device U6 Pin connection, the STcp pin of the 6th column drive control device U7 are connect with the P3.3 pin of master controller U1, the 6th column driving control The SHcp pin of device U7 processed is connect with the P3.4 pin of master controller U1；

7th column drive control device U8, the Ds pin of the 7th column drive control device U8 and the QT of the 6th column drive control device U7 Pin connection, the STcp pin of the 7th column drive control device U8 are connect with the P3.3 pin of master controller U1, the 7th column driving control The SHcp pin of device U8 processed is connect with the P3.4 pin of master controller U1；

8th column drive control device U9, the Ds pin of the 8th column drive control device U9 and the QT of the 7th column drive control device U8 Pin connection, the STcp pin of the 8th column drive control device U9 are connect with the P3.3 pin of master controller U1, the 8th column driving control The SHcp pin of device U9 processed is connect with the P3.4 pin of master controller U1；

It further include amplifying circuit, amplifying circuit includes:

P4.3 of No. 2 pins and No. 4 pins of amplification controller U13, amplification controller U13 respectively with master controller U1 draws Foot connection；

First adjusts unit, and first adjusts No. 5~No. 8 pins and LED indication mechanism 2 of unit and amplification controller U13 (being made of LED unit 3) connection；

Second adjusts unit, and second adjusts No. 5~No. 8 pins and LED indication mechanism 2 of unit and amplification controller U13 (being made of LED unit 3) connection；

Third adjusts unit, and third adjusts No. 5~No. 8 pins and LED indication mechanism 2 of unit and amplification controller U13 (being made of LED unit 3) connection；

First, which adjusts unit, includes eight adjusting components, and adjusting component includes:

First PNP triode, the emitter of the first PNP triode and No. 5~No. 8 pins of amplification controller U13 and LED Indication mechanism 2 (being made of LED unit 3) connection；The collector and LED indication mechanism 2 of first PNP triode are (by LED unit 3 Constitute) connection；The base stage of first PNP triode is connect with LED indication mechanism 2 (being made of LED unit 3)；In tri- pole the first PNP First resistor R1 is connected between the base stage of pipe and the emitter of the first PNP triode；

Second, which adjusts unit, includes eight adjusting components, and adjusting component includes:

Second PNP triode, the emitter of the second PNP triode and No. 5~No. 8 pins of amplification controller U13 and LED Indication mechanism 2 (being made of LED unit 3) connection；The collector and LED indication mechanism 2 of second PNP triode are (by LED unit 3 Constitute) connection；The base stage of second PNP triode is connect with LED indication mechanism 2 (being made of LED unit 3)；In tri- pole the 2nd PNP Second resistance R2 is connected between the base stage of pipe and the emitter of the second PNP triode；

It includes eight adjusting components that third, which adjusts unit, adjusts component and includes:

Third PNP triode, the emitter of third PNP triode and No. 5~No. 8 pins of amplification controller U13 and LED Indication mechanism 2 (being made of LED unit 3) connection；The collector and LED indication mechanism 2 of third PNP triode are (by LED unit 3 Constitute) connection；The base stage of third PNP triode is connect with LED indication mechanism 2 (being made of LED unit 3)；In tri- pole the 3rd PNP 3rd resistor R is connected between the base stage of pipe and the emitter of third PNP triode；

First adjusting diode D1, the second adjusting diode D2 and third adjust diode D3 and are connected on power supply and the first tune Unit, the second adjusting unit and third is saved to adjust between unit；

Clock circuit is the internal or external circuit specially designed accurately to clock, the clock circuit for single-chip microcontroller Be it is essential it be that the clock of single-chip microcontroller operation supports that single-chip microcontroller can regard that the lower sequential logic of clock driving is electric as Road.Its basic function is mainly, timing built in single-chip microcontroller, as communication clock generator, time interrupt source etc..Inside single-chip microcontroller Though there is oscillating circuit, to form clock must total adjunct circuit outside.Because built-in due to default setting and temperature drift etc. Clock is often inaccurate, and the clock generation method of single-chip microcontroller has the following two kinds, internal clocking mode and external clock mode.It is interior Portion's clock mode utilizes the oscillating circuit of chip interior, the external timing element on XTAL1 and XTAL2 pin, internal oscillator electricity Road just generates self-oscillation, with oscillograph it can be observed that XTAL2 export when clock signal.Most common internal clocking mode It is the shunt-resonant circuit formed using external crystal and capacitor.

The design, which is applicable in, for design simple economy selects built-in timing.Using single-chip microcontroller XTAL1 and XTAL2 pin and 24MHz crystal oscillator X1, capacitor C1, C2 composition.For with the concatenated capacitor of crystal oscillator, be that no definite value requires, main function is Maintain the stability of clock and the precision of crystal oscillator, some but precision is stablized in capacitor conference to be reduced, capacitor is small can reduce it is anti-interference Property, under normal circumstances 30PF be than more typical value, for the design, since LED display needs long-term autonomous working, institute Can be some higher with the requirement above stability, so two capacitance selection 20PF are more appropriate.

In line-scanning drive circuit, to save I/O mouthfuls of resources, it is convenient to extend, horizontal drive circuit is inputted using serial ports.This It designs line direction in circuit to complete to scan by three pieces 74HC595, it is controlled by the P2.3---P2.6 of master controller U1, by LED point It is connected between 8 lines and the parallel output terminal of 74HC595 of battle array by the resistance of 10k Ω.Wherein Q₀~Q₇: eight parallel-by-bits are defeated Outlet can directly control 8 sections of charactron.QT: cascaded-output end, it can connect the end Ds of next row drive control device, Realize connection grade.

In column scan driving circuit, the model 74HC595 of column drive control device, if the selection of column drive circuit is taken Parallel port input, can occupy a large amount of I/O mouthfuls of resources.And serial ports input is chosen, I/O mouthful resources are using less, so defeated using cascade Outlet may be implemented, and complete scanning by 8 column drive control devices, it is controlled by the P3.3--P3.5 of master controller U1.It connects respectively Enter Ds, STcp, SHcp of first row drive control device U2.The QT and secondary series drive control device U3 of first row drive control device U2 Ds, be connected and so on, complete column scan driving.

Claims

1. a kind of LED display characterized by comprising

Pedestal；

Control circuit board, the control circuit board are arranged in the pedestal, the integral control circuit in the control circuit board, The LED indication mechanism is connect with the control circuit；

The control circuit includes at least master controller U1 and the clock circuit connecting respectively with the master controller U1, row are swept Retouch driving circuit and column scan driving circuit；Wherein

The clock circuit includes:

First capacitor C1, one end of the first capacitor C1 are connect with the XTAL1 pin of the master controller U1, first electricity Hold the other end ground connection of C1；

Second capacitor C2, one end of the second capacitor C2 are connect with the XTAL2 pin of the master controller U1, second electricity Hold the other end ground connection of C2；

Crystal oscillator, one end of the crystal oscillator are connect with the XTAL1 pin of the master controller U1, the other end of the crystal oscillator with it is described The XTAL12 pin of master controller U1 connects.

2. LED display according to claim 1, which is characterized in that the line-scanning drive circuit includes:

The Ds pin of the first row drive control device U10, the first row drive control device U10 and the P2.3 of the master controller U1 Pin connection, the first row drive control device U10'sPin is connect with the P2.4 pin of the master controller U1, and described The STcp pin of a line drive control device U10 is connect with the P2.5 pin of the master controller U1, the first row drive control The SHcp pin of device U10 is connect with the P2.6 pin of the master controller U1；

The Ds pin of second row drive control device U11, the second row drive control device U11 and the first row drive control device The QT pin of U10 connects, the second row drive control device U11'sThe P2.2 pin of pin and the master controller U1 connect It connects, the STcp pin of the second row drive control device U11 is connect with the P2.5 pin of the master controller U1, second row The SHcp pin of drive control device U11 is connect with the P2.6 pin of the master controller U1；

The Ds pin of the third line drive control device U12, the third line drive control device U12 and the second row drive control device The QT pin of U11 connects, the third line drive control device U12'sThe P3.6 pin of pin and the master controller U1 connect It connects, the STcp pin of the third line drive control device U12 is connect with the P2.5 pin of the master controller U1, described the third line The SHcp pin of drive control device U12 is connect with the P2.6 pin of the master controller U1.

3. LED display according to claim 2, which is characterized in that the column scan driving circuit includes:

The Ds pin and the P3.5 of the master controller U1 of first row drive control device U2, the first row drive control device U2 draw Foot connection, the STcp pin of the first row drive control device U2 connect with the P3.3 pin of the master controller U1, and described the The SHcp pin of one column drive control device U2 is connect with the P3.4 pin of the master controller U1；

Secondary series drive control device U3, the Ds pin of the secondary series drive control device U3 and the first row drive control device U2 The connection of QT pin, the STcp pin of the secondary series drive control device U3 connect with the P3.3 pin of the master controller U1, The SHcp pin of the secondary series drive control device U3 is connect with the P3.4 pin of the master controller U1；

Third column drive control device U4, the Ds pin of the third column drive control device U4 and the secondary series drive control device U3 The connection of QT pin, the STcp pin of the third column drive control device U4 connect with the P3.3 pin of the master controller U1, The SHcp pin of the third column drive control device U4 is connect with the P3.4 pin of the master controller U1；

The Ds pin and the third column drive control device U4 of 4th column drive control device U5, the 4th column drive control device U5 The connection of QT pin, the STcp pin of the 4th column drive control device U5 connect with the P3.3 pin of the master controller U1, The SHcp pin of the 4th column drive control device U5 is connect with the P3.4 pin of the master controller U1；

The Ds pin and the 4th column drive control device U5 of 5th column drive control device U6, the 5th column drive control device U6 The connection of QT pin, the STcp pin of the 5th column drive control device U6 connect with the P3.3 pin of the master controller U1, The SHcp pin of the 5th column drive control device U6 is connect with the P3.4 pin of the master controller U1；

The Ds pin and the 5th column drive control device U6 of 6th column drive control device U7, the 6th column drive control device U7 The connection of QT pin, the STcp pin of the 6th column drive control device U7 connect with the P3.3 pin of the master controller U1, The SHcp pin of the 6th column drive control device U7 is connect with the P3.4 pin of the master controller U1；

The Ds pin and the 6th column drive control device U7 of 7th column drive control device U8, the 7th column drive control device U8 The connection of QT pin, the STcp pin of the 7th column drive control device U8 connect with the P3.3 pin of the master controller U1, The SHcp pin of the 7th column drive control device U8 is connect with the P3.4 pin of the master controller U1；

The Ds pin and the 7th column drive control device U8 of 8th column drive control device U9, the 8th column drive control device U9 The connection of QT pin, the STcp pin of the 8th column drive control device U9 connect with the P3.3 pin of the master controller U1, The SHcp pin of the 8th column drive control device U9 is connect with the P3.4 pin of the master controller U1.

4. LED display according to claim 3, which is characterized in that it further include amplifying circuit, the amplifying circuit packet It includes:

The G1 pin and G2 pin of amplification controller U13, the amplification controller U13 P4.3 with the master controller U1 respectively Pin connection；

First adjusts unit, and No. 5~No. 8 pins and the LED of the first adjusting unit and the amplification controller U13 are aobvious Show that mechanism connects；

Second adjusts unit, and No. 5~No. 8 pins and the LED of the second adjusting unit and the amplification controller U13 are aobvious Show that mechanism connects；

Third adjusts unit, and the third adjusts No. 5~No. 8 pins of unit and the amplification controller U13 and the LED is shown Show that mechanism connects.

5. LED display according to claim 4, which is characterized in that described first, which adjusts unit, includes eight adjustings Component, the adjusting component include:

First PNP triode, No. 5~No. 8 pins of the emitter of first PNP triode and the amplification controller U13 And the LED indication mechanism connection；The collector of first PNP triode is connect with the LED indication mechanism；Described first The base stage of PNP triode is connect with the LED indication mechanism；Base stage and the first PNP tri- in first PNP triode First resistor R1 is connected between the emitter of pole pipe.

6. LED display according to claim 5, which is characterized in that described second, which adjusts unit, includes eight adjustings Component, the adjusting component include:

Second PNP triode, No. 5~No. 8 pins of the emitter of second PNP triode and the amplification controller U13 And the LED indication mechanism connection；The collector of second PNP triode is connect with the LED indication mechanism；Described second The base stage of PNP triode is connect with the LED indication mechanism；Base stage and the 2nd PNP tri- in second PNP triode Second resistance R2 is connected between the emitter of pole pipe.

7. LED display according to claim 6, which is characterized in that it includes eight adjustings that the third, which adjusts unit, Component, the adjusting component include:

Third PNP triode, No. 5~No. 8 pins of the emitter of the third PNP triode and the amplification controller U13 And the LED indication mechanism connection；The collector of the third PNP triode is connect with the LED indication mechanism；The third The base stage of PNP triode is connect with the LED indication mechanism；Base stage and the 3rd PNP tri- in the third PNP triode 3rd resistor R is connected between the emitter of pole pipe.

8. LED display according to claim 7, which is characterized in that first adjusts diode D1, the second two poles of adjusting Pipe D2 and third adjust diode D3 and are connected on power supply and the first adjusting unit, the second adjusting unit and third adjusting Between unit.

9. LED display according to claim 8, which is characterized in that the model of the master controller U1 STC12C5A60S2；The first row drive control device U10~the third line drive control device U12 model 74HC595；It is described First row drive control device U2~the 8th column drive control device U9 model 74HC595；The amplification controller U13's Model 74HC4953.

10. a kind of LED display characterized by comprising

Pedestal；

The clock circuit includes:

Crystal oscillator, one end of the crystal oscillator are connect with the XTAL1 pin of the master controller U1, the other end of the crystal oscillator with it is described The XTAL12 pin of master controller U1 connects；

The line-scanning drive circuit includes:

The Ds pin of the third line drive control device U12, the third line drive control device U12 and the second row drive control device The QT pin of U11 connects, the third line drive control device U12'sThe P3.6 pin of pin and the master controller U1 connect It connects, the STcp pin of the third line drive control device U12 is connect with the P2.5 pin of the master controller U1, described the third line The SHcp pin of drive control device U12 is connect with the P2.6 pin of the master controller U1；

The column scan driving circuit includes:

The Ds pin and the 7th column drive control device U8 of 8th column drive control device U9, the 8th column drive control device U9 The connection of QT pin, the STcp pin of the 8th column drive control device U9 connect with the P3.3 pin of the master controller U1, The SHcp pin of the 8th column drive control device U9 is connect with the P3.4 pin of the master controller U1；

It further include amplifying circuit, the amplifying circuit includes:

No. 2 pins and No. 4 pins of amplification controller U13, the amplification controller U13 are respectively with the master controller U1's The connection of P4.3 pin；

Third adjusts unit, and the third adjusts No. 5~No. 8 pins of unit and the amplification controller U13 and the LED is shown Show that mechanism connects；

First PNP triode, No. 5~No. 8 pins of the emitter of first PNP triode and the amplification controller U13 And the LED indication mechanism connection；The collector of first PNP triode is connect with the LED indication mechanism；Described first The base stage of PNP triode is connect with the LED indication mechanism；Base stage and the first PNP tri- in first PNP triode First resistor R1 is connected between the emitter of pole pipe；

Second PNP triode, No. 5~No. 8 pins of the emitter of second PNP triode and the amplification controller U13 And the LED indication mechanism connection；The collector of second PNP triode is connect with the LED indication mechanism；Described second The base stage of PNP triode is connect with the LED indication mechanism；Base stage and the 2nd PNP tri- in second PNP triode Second resistance R2 is connected between the emitter of pole pipe；

Third PNP triode, No. 5~No. 8 pins of the emitter of the third PNP triode and the amplification controller U13 And the LED indication mechanism connection；The collector of the third PNP triode is connect with the LED indication mechanism；The third The base stage of PNP triode is connect with the LED indication mechanism；Base stage and the 3rd PNP tri- in the third PNP triode 3rd resistor R is connected between the emitter of pole pipe；

First adjusting diode D1, the second adjusting diode D2 and third adjust diode D3 and are connected on power supply and first tune Unit, the second adjusting unit and third is saved to adjust between unit；

The model STC12C5A60S2 of the master controller U1；The first row drive control device U10~the third line driving control The model 74HC595 of device U12 processed；The first row drive control device U2~the 8th column drive control device U9 model 74HC595；The model 74HC4953 of the amplification controller U13.