CN113393784A

CN113393784A - Digital display billboard

Info

Publication number: CN113393784A
Application number: CN202110749330.0A
Authority: CN
Inventors: 李志吉; 赵建清
Original assignee: Shenzhen City Xinguang Core System Device Co ltd
Current assignee: Shenzhen City Xinguang Core System Device Co ltd
Priority date: 2021-07-01
Filing date: 2021-07-01
Publication date: 2021-09-14

Abstract

The invention discloses a digital display billboard, which comprises a circuit board, wherein the circuit board is provided with a driving module and an LED digital array configured into a preset shape. The LED digital array comprises a plurality of LED segments, and the driving module displays different images by lighting different LED segments. Compared with the existing nixie tube, the LED digital array has more segments, better realizes the display of complex images, can better adapt to large-size digital display occasions such as traffic signal digital screens, oil station oil price screens, ball-field split screens and the like, and has better display effect; the decoding module adopts a decoder capable of multistage cascade connection, the cascade number can be set according to actual needs, and the expansibility is good; the billboard lamp bead adopts a direct-inserted straw hat lamp, so that the brightness is high and the performance is reliable; the digital display billboard is effectively waterproof by applying a glue pouring process and is suitable for outdoor occasions; meanwhile, the components of the invention have lower cost, and are convenient and easy to use.

Description

Digital display billboard

Technical Field

The invention relates to the technical field of signboards, in particular to a digital display signboard.

Background

The nixie tube is one type of display screen, and can display all parameters such as time, date, temperature and the like which can be represented by numbers by inputting relative currents to different pins of the nixie tube to enable the nixie tube to be lightened so as to display the numbers. Because of its low price and simple use, it is widely used in the field of electric appliances, especially household appliances, such as air conditioners, water heaters, refrigerators, etc. Most of water heaters use nixie tubes, and other household appliances also use liquid crystal screens and fluorescent screens.

The nixie tube is an electronic device capable of displaying digital and other information, and can be divided into a common anode nixie tube and a common cathode nixie tube according to the connection mode of the light emitting diode unit. The common anode nixie tube is a nixie tube which connects the anodes of all light-emitting diodes together to form a common anode (COM), the common anode COM is connected to +5V when the common anode nixie tube is applied, when the cathode of a certain field of light-emitting diodes is at a low level, the corresponding field is lightened, and when the cathode of a certain field is at a high level, the corresponding field is not lightened. The common cathode nixie tube is a nixie tube which connects the cathodes of all the light-emitting diodes together to form a common Cathode (COM), when the common cathode nixie tube is applied, the common cathode COM is connected to a ground wire GND, when the anode of a certain field of the light-emitting diodes is at a high level, the corresponding field is lightened, and when the anode of a certain field is at a low level, the corresponding field is not lightened. The digital tube is required to display normally, each segment code of the digital tube is required to be driven by a driving circuit so as to display the required number, and therefore, the digital tube can be divided into a static type and a dynamic type according to different driving modes of the digital tube.

The 8-shaped device is internally connected with leads, and only the strokes and the common electrodes of the 8-shaped device need to be led out. The common number of the sections of the led nixie tube is generally 7 sections, and a decimal point is added, and the other sections are similar to a 3-bit '+ 1' type. The number of bits is half bits, 1, 2, 3, 4, 5, 6, 8, 10 bits, etc.

When the display screen is applied to large-size digital display occasions such as traffic signal digital screens, oil station oil price screens, court counting screens and the like, the existing display screens have fewer digital pipe sections in the shape of an 8 and are single in display, and the requirements of the large-size digital display occasions cannot be met.

Disclosure of Invention

Aiming at the defects in the prior art, the invention provides a digital display billboard which can meet the requirements of large-size digital display occasions such as a traffic signal digital screen, an oil station oil price screen, a court counting screen and the like.

The invention provides a digital display billboard, which comprises a circuit board; the circuit board is provided with a driving module and an LED digital array configured into a preset shape; the LED digital array comprises a plurality of LED segments; the driving module displays different images by lighting different LED segments.

Preferably, the LED segment comprises a plurality of LED lamps arranged in series.

Preferably, the LED lamp is a straw hat lamp.

Preferably, the LED digital array further includes a plurality of current limiting resistors connected in one-to-one correspondence with the LED segments.

Preferably, the circuit board is further provided with a decoding module for converting serial data into parallel data and sending the parallel data to the driving module.

Preferably, the decoding module comprises a plurality of cascaded decoders.

Preferably, the circuit board is further provided with a relay amplification module for amplifying the received serial data and sending the amplified serial data to the decoding module.

Preferably, the driving module adopts a Darlington inverting driver.

Preferably, the driving module adopts ULN 2803.

Preferably, the decoder employs 74HC 595.

The digital display billboard of the invention has the beneficial effects that: compared with the existing nixie tube, the LED digital array is more in number, the display of complex images is better realized, the large-size digital display occasions such as a traffic signal digital screen, an oil station oil price screen, a ball-field recording screen and the like can be better adapted, and the better display effect is achieved; the decoding module adopts a decoder 74HC595 which can be cascaded in multiple stages, the cascade number can be set according to actual needs, and the expansibility is good; moreover, the lamp beads of the watching board adopt straw hat lamps, so that the brightness is high and the performance is reliable; the digital display billboard is effectively waterproof by applying a glue pouring process and is suitable for outdoor occasions; meanwhile, the component of the invention has lower cost, and is convenient and easy to use.

Drawings

In order to more clearly illustrate the detailed description of the invention or the technical solutions in the prior art, the drawings that are needed in the detailed description of the invention or the prior art will be briefly described below. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.

Fig. 1 is a schematic structural diagram of a digital display billboard in an embodiment of the invention;

FIG. 2 is a circuit diagram of a decoding module and a driving module according to an embodiment of the present invention;

fig. 3 is a circuit diagram of a power module according to an embodiment of the invention.

Detailed Description

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby.

It is to be noted that, unless otherwise specified, technical or scientific terms used herein shall have the ordinary meaning as understood by those skilled in the art to which the invention pertains.

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It will be understood that the terms "comprises" and/or "comprising," when used in this specification and the appended claims, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.

It is also to be understood that the terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the specification of the present invention and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

It should be further understood that the term "and/or" as used in this specification and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.

As shown in fig. 1, an embodiment of the present invention provides a digital display billboard, which includes a circuit board, on which a driving module and an LED array configured in a predetermined shape are disposed. The LED digital array comprises a plurality of LED segments, and the driving module displays different images by lighting different LED segments. The LED section includes the LED lamp of a plurality of series connection settings, and the LED lamp is billboard lamp pearl promptly. The billboard lamp bead is composed of a high-brightness direct-insertion straw hat lamp and has the characteristics of high brightness and reliable performance. The digital display billboard provided by the embodiment of the invention applies a glue pouring process, can effectively prevent water and is suitable for outdoor occasions. In the embodiment of the invention, the size of the viewing plate and the arrangement density of the lamp beads can be set according to the needs of customers, and the display brightness is high if the arrangement density of the lamp beads is high; the density of bead arrangement is little, and the luminance that shows is low. The cascade mode of the lamp beads is in series connection, the number of lamps connected in series with each LED section is different but not more than 6 at most, each LED section is connected with a current-limiting resistor in series to protect the chip and the lamps, and the resistance values of the resistors connected with different LED sections are determined according to the number of the lamp beads. Specifically, the lamp bead configuration resistors are different due to different numbers of lamp bead series connection, in the embodiment of the present invention, five different numbers of lamp beads, namely 1, 2, 3, 5, and 6, are connected in series on the digital display billboard, in this embodiment, resistors of 560 Ω, 680 Ω, 750 Ω, 910 Ω, and 1.1K Ω are used from small to large, and the five resistors with different resistances are used to complete voltage reduction to protect the ULN 2803. In the embodiment of the invention, the LED digital array is configured into an 8-shaped shape and comprises 17 LED segments which are respectively connected with COMA, COMB, COMC, COMD, COME, COMF, COMG, COMH, COMI, COMJ, COMK, COML, COMM, COMN, COMO, COMP and COMQ output by the driving module. In the embodiment of the invention, each point position comprises two parallel direct-inserted straw hat lamps, and the two parallel direct-inserted straw hat lamps are different in color, so that the brightness of the digital display billboard is improved, the visual effect is improved, and the ornamental value is improved. In other embodiments, the color of the lamp bead can be set according to actual needs, and the two parallel direct-insert straw hat lamps can also be in the same color. In the embodiment of the invention, the design of 17 LED segments can meet the requirement of more complicated graphic and character design, and the visual effect is better. In other embodiments, the number of the LED segments can be set according to actual needs, and the number of the lamp beads in each LED segment can be set according to actual needs. Compared with a nixie tube in the prior art, the nixie tube has more sections, can better adapt to large-size digital display occasions such as a traffic signal digital screen, an oil station oil price screen and a ball field split screen, and has better display effect.

The position of lamp pearl on the PCB circuit board will be through arranging and independent control according to the typeface of digit is strict, will simulate before arranging and play carelessly, reaches final demonstration typeface, and the density of lamp pearl can be adjusted according to customer's demand to the luminance of control billboard.

In the embodiment of the invention, the power interface provides 12V power supply for the circuit board. The circuit board is also provided with a signal interface which provides a control signal for the circuit board. The signal interface is connected with an external control system to complete data transmission of the display content. The control system is internally provided with a driving program and is also provided with the patterns of numbers, characters or images to be displayed by the LED digital array. The control system controls the embodiment of all display information and each module is independently controlled. In this embodiment, the signal bus and the power line are separated from each other and are not used in a mixed manner, so that a fault caused by insufficient current-carrying capacity of the signal line is prevented. Sufficient mounting holes are reserved at the plate edges, and the screw locking effect is good by adding through holes on the bonding pads with the rings. In this embodiment, the PCB mounting hole is further provided with a mounting bracket.

In the embodiment of the invention, the circuit board is also provided with a decoding module which is used for converting serial data into parallel data and sending the parallel data to the driving module. The decoding module comprises a plurality of cascaded decoders, preferably 74HC595 is adopted for the decoders. The circuit board is also provided with a relay amplification module which is used for amplifying the received serial data and sending the serial data to the decoding module, and the relay amplification module adopts 74HC 245. The relay amplification module is connected with the signal interface, the signal interface sends the serial data to the relay amplification module, the relay amplification module amplifies the serial data and outputs the serial data to the decoder 74HC595, and the serial data is converted into parallel data after the decoding of the 74HC 595. Based on the characteristic of serial-to-parallel conversion, enough decoders can be cascaded according to the number of digital segments to be lightened. The driving module consists of 8-path Darlington inverting drivers of the ULN2803 and is used for driving the LED lamp beads, and the number of the ULN2803 can be configured according to the condition of an actual LED segment. It is also possible to configure the number of 74HC595 decoders, and one 74HC595 decoder configures one ULN 2803.

As shown IN fig. 2, the output pin B7 of the relay amplifying module U6 is connected to the serial data input pin DI of the decoder U2, and after being decoded by the decoder 74HC595, the output signals are output from the decoders D0, D1, D2, D3, D4, D5, D6 and D7 to the IN1, IN2, IN3, IN4, IN5, IN6 and IN7 corresponding to the driving module U3, so that the driving module generates driving signals to drive the lamp bead. The decoding module includes a plurality of cascaded decoders 74HC595, specifically, a DO pin of the previous-stage decoder 74HC595 is connected to a DI pin of the next-stage decoder 74HC595, and a corresponding number of decoders 74HC595 can be set according to actual requirements.

In the embodiment of the present invention, the power supply module further includes a power supply module, as shown in fig. 3, the power supply module includes an LM7805, a capacitor C4, a capacitor C5, a capacitor C6, and a capacitor C7, a first end of the capacitor C4 and a first end of the capacitor C5 after being connected in parallel are connected to an input end of the LM7805, and a second end of the capacitor C4 and the capacitor C5 after being connected in parallel are grounded; the capacitor C6 is connected with the output end of the first end LM7805 after being connected with the capacitor C7 in parallel, and the second end of the capacitor C6 after being connected with the capacitor C7 in parallel is grounded. The input end of LM7805 is connected with an external power supply.

In the digital display billboard provided by the embodiment of the invention, the LED digital array is configured into a preset 8-shaped shape. Compared with the existing nixie tube, the LED digital array is set into 17 sections, so that the number of the sections is more, the display of complex images is better realized, the LED digital array can better adapt to large-size digital display occasions such as a traffic signal digital screen, an oil station oil price screen, a ball-field split screen and the like, and the LED digital array has a better display effect; the decoding module adopts a decoder 74HC595 which can be cascaded in multiple stages, the cascade number can be set according to actual needs, and the expansibility is good; the billboard lamp bead adopts a direct-inserted straw hat lamp, and is simple, convenient and easy to use, high in brightness, reliable in performance and strong in practicability; the billboard is effectively waterproof by applying a glue pouring process, and is suitable for outdoor occasions; the lamp beads can contain various colors, so that the ornamental value is improved; meanwhile, the components of the embodiment of the invention have lower cost, and are convenient and easy to use.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention, and they should be construed as being included in the following claims and description.

Claims

1. A digital display billboard is characterized by comprising a circuit board; the circuit board is provided with a driving module and an LED digital array configured into a preset shape; the LED digital array comprises a plurality of LED segments; the driving module displays different images by lighting different LED segments.

2. The digital display sign according to claim 1, wherein the LED segments comprise a plurality of LED lights connected in series.

3. The digital display billboard of claim 2, wherein the LED light is a straw hat light.

4. The digital display billboard of claim 1, wherein the LED array further comprises a plurality of current limiting resistors connected in one-to-one correspondence with the LED segments.

5. The digital display billboard of claim 1, wherein the circuit board further comprises a decoding module for converting serial data into parallel data and sending the parallel data to the driving module.

6. The digital signage apparatus of claim 5, wherein the decoding module comprises a plurality of cascaded decoders.

7. The digital display billboard of claim 5, wherein the circuit board further comprises a relay amplifying module for amplifying the received serial data and sending the amplified serial data to the decoding module.

8. The digital signage display of claim 1, wherein the driving module employs a darlington inverter driver.

9. The digital signage apparatus of claim 8, wherein the driver module is a ULN 2803.

10. A digital signage display as claimed in claim 6, in which the decoder is 74HC 595.