CN221225814U

CN221225814U - Display circuit

Info

Publication number: CN221225814U
Application number: CN202322759450.6U
Authority: CN
Inventors: 李九倩; 曹相军; 张伟
Original assignee: Zhongxiu Technology Co ltd
Current assignee: Zhongxiu Technology Co ltd
Priority date: 2023-10-13
Filing date: 2023-10-13
Publication date: 2024-06-25
Anticipated expiration: 2033-10-13

Abstract

The utility model discloses a display circuit, which comprises a control unit and a display load circuit connected with the control unit; the display load circuit comprises a first branch circuit, wherein the first branch circuit comprises a first LED drive control special circuit, at least one multicolor LED indicator lamp and at least one first nixie tube connected to a segment output pin of the first LED drive control special circuit; the control ports of the multicolor LED indicator lamps are respectively connected to the bit output pins of the special LED drive control circuit. The LED driving control special circuit is adopted to respectively control the multicolor light emitting diode and the nixie tube by the bit and the segment output pin, so that the I/O port of the control unit is not occupied excessively, and the indication of various states is met under the condition of not adding a circuit.

Description

Display circuit

Technical Field

The utility model relates to a display circuit, in particular to a display circuit based on an LED lamp.

Background

In the electronic technology, the nixie tube is used as a semiconductor light-emitting device, and the basic semiconductor nixie tube driven by a singlechip is formed by arranging 7 strip-shaped light-emitting diodes according to a Chinese character 'ri', so that the display of figures '0-9' and a small number of characters can be realized. In addition, in order to display decimal points, 1 dot-shaped light emitting diode is added, so that the nixie tube consists of 8 light emitting diodes, and the light emitting diodes are respectively named as 'a, b, c, d, e, f, g, dp' in the arrangement sequence. The nixie tube is divided into a common cathode nixie tube and a common anode nixie tube, wherein the common cathode nixie tube is used for connecting cathodes of all light emitting diodes together to form a common cathode. The common cathode nixie tube connects the common electrode COM to the ground GND when in use, and when the anode of a certain field light-emitting diode is at a high level, the corresponding field is lighted. When the anode of a field is low, the corresponding field is not lit, and the common anode is opposite. The digital code obtained by the decoding circuit is connected with the corresponding light emitting diode to form the corresponding word.

When using a plurality of three-colour LED lamps, can be through microprocessor's three GPIO interfaces, be connected to microprocessor data interface with the pin of the same colour of the three colours of red R of a set of lamp, green G, blue B, microprocessor three GPIO interface can unify the pin of the same colour of control every three-colour LED lamp, unify the colour of changing a set of three-colour LED lamp, use as light effect, once demonstrate a colour and represent a state, demonstrate more different states through controlling different colour switches.

In a nixie tube display circuit, a microprocessor is generally used for controlling a special circuit chip through LED driving to control a plurality of nixie tubes to display, and the circuit state cannot be displayed due to the lack of an indicator lamp in the circuit.

Each light emitting diode and each LED nixie tube in the nixie tube display circuit with the function of the indicator lamp are directly connected with the I/O port of the microprocessor one by one, the situation that the I/O port of the microprocessor is insufficient and the I/O port needs to be expanded by an expansion chip easily occurs, and the microprocessor is heavy in burden because the LED nixie tube drive display circuit occupies more I/O ports of the microprocessor and finishes the tasks of decoding, scanning and the like of the LED nixie tube. The existing circuit structure is adopted, so that not only is the indicated information single, but also the complexity and the instability of the circuit are increased, and the cost of the circuit is increased.

Disclosure of utility model

The utility model aims to overcome the defects of large interface load and complex circuit of a control chip caused by adopting an I/O port of a control unit to control in a circuit with a multicolor light-emitting diode and a nixie tube in the prior art, and provides a display circuit which adopts a bit and a segment output pin of a special circuit for LED driving control to respectively control the multicolor light-emitting diode and the nixie tube, does not occupy the I/O port of the control unit too much, and meets the indication of various states under the condition of not increasing the circuit.

The aim of the utility model is achieved by the following technical scheme:

the utility model provides a display circuit, which comprises a control unit and a display load circuit connected with the control unit;

the display load circuit comprises a first branch circuit, wherein the first branch circuit comprises a first LED drive control special circuit, at least one multicolor LED indicator lamp and at least one first nixie tube connected to a segment output pin of the first LED drive control special circuit;

The control ports of the multicolor LED indicator lamps are respectively connected to the bit output pins of the special LED drive control circuit.

In one possible design, the display load circuit includes a second branch including a second LED drive control dedicated circuit and at least one second digital tube connected to a segment output pin of the second LED drive control dedicated circuit.

In one possible design, the multi-color LED indicator light is a three-color LED indicator light.

In one possible design, the three-color LED indicator light includes red, green, and blue LED light emitting diodes.

In one possible design, the control unit and the LED driving control dedicated circuit are connected in a serial manner.

The utility model has the following advantages:

The proposal adopts the bit and the segment output pin of the special LED drive control circuit to respectively control the multicolor light emitting diode and the nixie tube, so that the I/O port of the control unit is not occupied excessively, and the circuit structure is simplified.

Drawings

In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of the present utility model;

FIG. 2 is a circuit diagram of a first branch circuit according to the present utility model;

fig. 3 is a circuit diagram of a second branch of the present utility model.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments. The components of the embodiments of the present utility model generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the utility model, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, based on the embodiments of the utility model, which are apparent to those of ordinary skill in the art without inventive faculty, are intended to be within the scope of the utility model.

In addition, the embodiments of the present utility model and the features of the embodiments may be combined with each other without collision.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

In the description of the present utility model, it should be noted that, directions or positional relationships indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are directions or positional relationships based on those shown in the drawings, or are directions or positional relationships conventionally put in use of the inventive product, or are directions or positional relationships conventionally understood by those skilled in the art, are merely for convenience of describing the present utility model and for simplifying the description, and are not to indicate or imply that the apparatus or element to be referred to must have a specific direction, be constructed and operated in a specific direction, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.

In the description of the present utility model, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

The utility model provides a display circuit which comprises a control unit and a display load circuit connected with the control unit. Depending on the particular use scenario, the display load circuit may include only at least one first leg, or may include at least one first leg and at least one second leg.

Specifically, the first branch circuit comprises a first LED driving control special circuit, a multicolor LED indicator lamp and a first nixie tube; at least one multicolor LED indicator lamp and at least one first nixie tube are arranged, and control ports of the multicolor LED indicator lamps are respectively connected with the position output pins of the special LED drive control circuit; the first nixie tube is connected to the segment output pin of the first LED drive control special circuit.

The second branch circuit comprises a second LED drive control special circuit and at least one second digital tube, and the second digital tube is connected to the segment output pin of the second LED drive control special circuit, which is the same as the first branch circuit.

The multicolor LED indicator lamp can be double-color, three-color, four-color and the like. Typically, three colors, including red, green, and blue LEDs, are used.

The control unit is connected with the LED driving control special circuit in a serial mode.

For the convenience of understanding the present embodiment, a specific embodiment will be described.

The control unit is based on intelligent control chips such as a microprocessor MCU, a programmable logic controller PLC and the like. The display circuit comprises a first branch circuit and a second branch circuit. By way of example, the control unit may employ STM32F103RCT6.

Referring to fig. 2 to 3, a microprocessor is matched with two special circuits for LED driving control to control seven nixie tubes and six indicator lamps, wherein one nixie tube does not need an indicator lamp to indicate the state in the circuit. One LED drive control special circuit can control five nixie tubes, and the other LED drive control special circuit controls the remaining two nixie tubes and six indicator lamps, and different states of all the nixie tubes can be displayed through the indicator lamps.

The communication mode of the microprocessor and the LED drive control special circuit chip is two-line serial communication, DIN and SCLK data interfaces of the two groups of LED drive control special circuit chips can be connected by using pins of the microprocessor PC.6-PC.9, DIN is a data input pin, SCLK is a clock input pin, serial data is input, input data is transmitted when SCLK is high level, the data is input at the rising edge of the clock input pin SCLK when SCLK is low level.

The LED drive control special circuit chip TM1640 is internally integrated with circuits such as a microprocessor digital interface, a data latch, an LED drive and the like, the display mode is 8 sections of 16 bits, the 8 sections respectively correspond to a, b, c, d, e, f, g, dp sections, the sections are connected to the section output pins of the LED drive control special circuit chip, the 16 bits correspond to each digit on each nixie tube, and the 16 digits can be connected.

The second branch shown in fig. 3 is a common negative nixie tube driving connection circuit diagram. The common cathode nixie tube refers to the cathode of all the light emitting diodes which are connected together to form a common cathode. The common cathode nixie tube connects the common electrode COM to the ground GND when in use, and when the anode of a certain field light-emitting diode is at a high level, the corresponding field is lighted. When the anode of a field is low, the corresponding field is not lit. The LED driving control dedicated circuit chip U1 shown in fig. 3 is TM1640, and one LED driving control dedicated circuit chip has 16 output pins, which can control a group of five three-bit nixie tubes, or a group of four-bit nixie tubes. a. b, c, d, e, f, g, dp the same name end of each code bit is connected with the output pin of the same section, the bit codes can be sequentially arranged according to the number of a group of nixie tubes, and the digits of each nixie tube can be controlled in turn by latching the bit codes in time sharing.

The first branch shown in fig. 2 includes 6 three-color LED indicators and 2 digital tubes. When a plurality of three-color LED light emitting diodes are used, the same color of the three colors of red R, green G and blue B of a group of lamps is connected to the data interface of the microprocessor through three data interfaces of the microprocessor, and the three interfaces of the microprocessor can only uniformly change one group of three-color LED light emitting diodes to be used as a light effect and can not display additional effective information. In the utility model, two groups of three-color LED light emitting diodes are directly connected with the output pins of the special LED drive control circuit chip, the special LED drive control circuit chip U2 shown in FIG. 2 is TM1640, the positive electrode of one group of three-color LED light emitting diodes is connected with the output pins of the sections a, b and c of the special LED drive control circuit chip, the positive electrode of one group of three-color LED light emitting diodes is connected with the output pins of the sections d, e and f of the special LED drive control circuit chip, and the negative electrode of each group of three-color LED lamps is respectively connected with the 3-bit output pins of the special LED drive control circuit chip. By the aid of the connection mode, the problem of shortage of pins of the microprocessor is solved, and pins of the special circuit chip for LED drive control are reasonably utilized. At the same time, more prominent is: the three-color LED light emitting diode is introduced, and one or more three-color LED lamp switches in each group of lamps can be controlled by controlling the section and the position output pin of the special circuit chip for LED driving control, and one or more lamps of each three-color LED lamp are lighted.

Therefore, various light effects can be displayed, so that the circuit applying the utility model has wider application range and more flexible application.

The indication lamp is directly connected with the output pin of the special circuit chip for LED drive control, so that the pin of the microprocessor is not additionally occupied, and the pin of the special circuit chip for LED drive control is not wasted; at the same time, more prominent is: the three-color LED light emitting diodes are introduced, whether each light emitting diode emits light or not can be controlled by controlling the LED to drive and control the special circuit core segment and the bit output pin, and more different colors of lights with the three primary colors of red R, green G and blue B can be utilized to display different states represented by different nixie tubes; the circuit of the utility model has wider application range and more flexible application.

Although the present utility model has been described with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described, or equivalents may be substituted for elements thereof, and any modifications, equivalents, improvements and changes may be made without departing from the spirit and principles of the present utility model.

Claims

1. A display circuit comprising a control unit and a display load circuit connected to the control unit; the method is characterized in that:

2. A display circuit according to claim 1, wherein: the display load circuit comprises a second branch circuit, wherein the second branch circuit comprises a second LED drive control special circuit and at least one second digital tube connected to a segment output pin of the second LED drive control special circuit.

3. A display circuit according to claim 1, wherein: the multicolor LED indicator lamp is a three-color LED indicator lamp.

4. A display circuit according to claim 3, wherein: the three-color LED indicator lamp comprises red, green and blue LED light emitting diodes.

5. A display circuit according to claim 1, wherein: the control unit is connected with the LED drive control special circuit in a serial mode.