CN213815504U

CN213815504U - Line and row mixed LED display matrix circuit

Info

Publication number: CN213815504U
Application number: CN202022702036.8U
Authority: CN
Inventors: 陈瑾彬; 卢景添
Original assignee: Guangdong Mezic Tech Co ltd
Current assignee: Guangdong Mezic Tech Co ltd
Priority date: 2020-11-20
Filing date: 2020-11-20
Publication date: 2021-07-27
Anticipated expiration: 2030-11-20

Abstract

The utility model discloses a ranks hybrid LED display matrix circuit, include the LED banks matrix that (N-1) a N LED banks unit formed and be located a N control port of LED banks matrix one side, wherein, the LED banks unit includes the LED lamp of a plurality of series connection, the LED banks matrix is through N the control port is connected with the microcontroller electricity, a side diagonal on the LED banks matrix N cross point position respectively with a N control port one-to-one electricity is connected. It is thus clear that implement the utility model discloses can be under the prerequisite that does not occupy too many microcontroller resources, save integrated drive circuit's cost.

Description

Line and row mixed LED display matrix circuit

Technical Field

The utility model relates to an electronic circuit technical field especially relates to a ranks hybrid LED display matrix circuit.

Background

The conventional LED display matrix circuit is controlled based on a scan bus and a data bus, and specifically, the LED display matrix circuit may be driven by an independent integrated driving circuit, or may be driven by a microcontroller.

However, practice has found that the cost of driving the LED display matrix circuit by the integrated driving circuit is high, the integrated driving circuit occupies a large space, and the integrated driving circuit needs to be connected to the microcontroller through 2 to 3 lines in a communication manner, so that extra standby current consumption is caused during standby, and resources of a communication port of the microcontroller are occupied.

The I/O port of the microcontroller directly drives the LED display matrix, and the scan bus and the data bus occupy more I/O ports of the microcontroller, for example, the four "8" 28-point LED matrices (constituting nixie tubes) need 11I/O ports no matter the scanning mode is made to be 4 × 7 or 5 × 6.

Therefore, how to design a novel LED display matrix circuit saves the cost of an integrated driving circuit on the premise of not occupying too many microcontroller resources, and is a technical problem to be solved urgently.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that a ranks hybrid LED display matrix circuit is provided, can save integrated drive circuit's cost under the prerequisite that does not occupy too many microcontroller resources.

In order to solve the above technical problem, the present invention provides a row-column hybrid LED display matrix circuit, comprising an LED lamp array matrix formed by (N-1) × N LED lamp array units and N control ports located at one side of the LED lamp array matrix, wherein the LED lamp array unit comprises a plurality of LED lamps connected in series,

the LED lamp group matrix is electrically connected with the microcontroller through the N control ports,

n cross point positions on a diagonal line on one side of the LED lamp group matrix are respectively and correspondingly electrically connected with the N control ports one by one.

Compared with the prior art, the embodiment of the utility model has following beneficial effect at least:

the utility model discloses ranks hybrid LED display matrix circuit, can be through a N control port, realize the control to (N-1) a N LED banks unit, compare with the LED matrix circuit among the prior art, be favorable to the IO mouth of rational utilization microcontroller, thereby be favorable to the resource of rational utilization microcontroller, and, microcontroller passes through this N control port and LED banks matrix connection, realize the drive to this LED banks matrix, be favorable to saving integrated drive circuit's the space of arranging and cost.

As an optional implementation mode, in the present invention, the row-column hybrid LED display matrix circuit further comprises N protection units, wherein the protection units comprise a current limiting resistor and a current sinking diode connected in parallel,

n cross point positions on a diagonal line on one side of the LED lamp group matrix are electrically connected with the N control ports in a one-to-one correspondence mode through the N protection units.

As an optional implementation manner, in the present invention, the LED lamp group unit includes 2 LED lamps connected in series.

As an optional implementation mode, the utility model discloses in, the LED banks matrix sets up on the base plate, wherein, the base plate is one of them of two-sided copper-clad plate, single face copper-clad plate, flexible PCB board and aluminium base PCB board.

As an optional implementation, in the present invention, the LED lamp is a patch element.

As an optional embodiment, in the present invention, the LED lamp is an insert element.

Drawings

Fig. 1 is a schematic circuit diagram of a row-column hybrid LED display matrix circuit according to an embodiment of the present invention.

Detailed Description

In order to make the technical solution of the present invention better understood, the technical solution of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the invention. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.

The embodiment of the utility model discloses a row-column mixed LED display matrix circuit, which comprises an LED lamp group matrix formed by (N-1) xN LED lamp group units and N control ports positioned at one side of the LED lamp group matrix, wherein the LED lamp group unit comprises a plurality of LED lamps which are connected in series,

the LED lamp group matrix is electrically connected with the microcontroller through N control ports,

n cross point positions on the diagonal line of one side of the LED lamp group matrix are respectively and correspondingly electrically connected with the N control ports one by one.

In the embodiment of the present invention, optionally, the row/column hybrid LED display matrix circuit may include a LED lamp array matrix formed by 3 × 4 LED lamp array units, and accordingly, the number of the control ports located on one side of the LED lamp array matrix is 4, at this time, N is 4, and N-1 is 3. Alternatively, the row-column hybrid LED display matrix circuit may comprise an LED lamp array matrix formed by 5 × 6 LED lamp array units, and accordingly, the number of control ports located at one side of the LED lamp array matrix is 6, in this case, N is 6, and N-1 is 5. Generally, N may be selected between 4 and 8. Specifically, as shown in fig. 1, the row-column hybrid LED display matrix circuit includes an LED lamp group matrix formed by 5 × 6 LED lamp group units, and one side of the row-column hybrid LED display matrix circuit is provided with 6 control ports. Furthermore, the LED lamp group unit comprises 2 LED lamps which are connected in series, the LED lamp group matrix is electrically connected with the microcontroller through N control ports, and 6 cross points on one side diagonal line of the LED lamp group matrix are electrically connected with the 6 control ports. Further, the microcontroller may be a control chip of model SN8F570202, or a control chip of model FT60F 011A. It can be understood that the microcontroller may also perform the type selection according to the number of the control ports of the LED lamp group matrix, specifically, based on that the number of the control ports of the LED lamp group matrix is N, the control chip needs to have at least N I/O ports. Further alternatively, as shown in FIG. 1, the microcontroller and the row and column hybrid LED display matrix circuit may be connected through interface CN 2. Still further alternatively, as shown in FIG. 1, the microcontroller may be electrically connected to the power supply terminal through interface CN 4.

It can be seen, the utility model discloses ranks hybrid LED display matrix circuit can be through N control port, realize the control to (N-1) a N LED banks unit, compare with the LED matrix circuit among the prior art, be favorable to rational utilization microcontroller's IO mouth, thereby be favorable to rational utilization microcontroller's resource, and, microcontroller is through this N control port and LED banks matrix connection, realize the drive to this LED banks matrix, be favorable to saving integrated drive circuit's arrangement space and cost.

The embodiment of the utility model provides an in, it is optional, LED banks matrix sets up on the base plate, and wherein, the base plate is one of them of two-sided copper-clad plate, single face copper-clad plate, flexible PCB board and aluminium base PCB board. Be favorable to the nimble of LED banks matrix to arrange, thereby be favorable to the utility model discloses ranks hybrid LED display matrix circuit is applied to the scene of various differences, has stronger adaptability.

The embodiment of the utility model provides an in, it is optional, the paster component can be chooseed for use to the LED lamp, perhaps, the plug-in components can be chooseed for use to the LED lamp. It can be understood that the LED lamp of the paster that the designer can choose for use as required or the LED lamp of chooseing for use the plug-in components is favorable to the nimble of LED banks matrix to be arranged, thereby is favorable to the utility model discloses ranks hybrid LED display matrix circuit is applied to the scene of various differences, further strengthens its adaptability.

In some embodiments of the present invention, the row-column hybrid LED display matrix circuit further comprises N protection units, each protection unit comprises a current-limiting resistor and a current-sinking diode connected in parallel,

In this embodiment, specifically, as shown in fig. 1, for an LED lamp group matrix formed by 5 × 6 LED lamp group units, 6 cross points on one side diagonal of the LED lamp group matrix are electrically connected to 6 control ports through 6 protection units.

In this embodiment, the parameters of the current limiting resistor and the perfusion diode may be determined according to the specific condition of the connected LED lamp set matrix, and the specific determination process may be as follows.

The current limiting resistor on each branch circuit can be used for limiting the lighting current of one LED lamp group unit, the resistance value of the current limiting resistor is determined according to the working output voltage of the microcontroller and the rated current calculation result of the LED lamp group unit, and the resistance value is generally from several ohms to several hundred ohms. Example (c): the working voltage of the microcontroller is 5V, the output high level of the I/O port is 4.5V, the output low level is 0.5V, the forward voltage drop of the current-filling diode is 0.4V, the lighting current of the LED lamp group unit is 20mA, and the resistance value of the current-limiting resistor is calculated:

(4.5V-0.5V-0.4V)/20mA＝180Ω

the current-sinking diode on each branch circuit is used for shielding overhigh voltage drop generated on the current-limiting resistor connected in parallel on the branch circuit when the branch circuit is used as a scanning line, and the brightness difference and the flicker feeling caused by unbalanced current obtained by each LED lamp group unit are avoided. The forward current of the current-sinking diode can be determined by calculation according to the current of N-1 LEDs which are lighted at the same time, and is generally dozens of milliamperes to hundreds of milliamperes. Example (c): and when one branch circuit is taken as a scanning line, 5 LED lamp group units of the other 5 branch circuits are turned on at most. The lighting current of a single LED lamp group unit is 20mA, and the forward current of the diode is calculated as follows:

20mA×5＝100mA

in this embodiment, optionally, the LED lamp group unit includes 2 LED lamps connected in series.

Finally, it should be noted that: the row and column mixed LED display matrix circuit disclosed in the embodiments of the present invention is only a preferred embodiment of the present invention, and is only used for illustrating the technical solution of the present invention, not limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those skilled in the art; the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the embodiments of the present invention.

Claims

1. A row-column hybrid LED display matrix circuit is characterized in that,

comprises an LED lamp group matrix formed by (N-1) multiplied by N LED lamp group units and N control ports positioned at one side of the LED lamp group matrix, wherein the LED lamp group unit comprises a plurality of LED lamps connected in series,

2. A row and column hybrid LED display matrix circuit according to claim 1, further comprising N protection units, said protection units comprising current limiting resistors and current sinking diodes connected in parallel,

3. A row and column hybrid LED display matrix circuit according to claim 2 wherein the LED lamp group unit comprises 2 LED lamps in series.

4. A row and column hybrid LED display matrix circuit according to any one of claims 1 to 3 wherein the LED light bank matrix is disposed on a substrate, wherein the substrate is one of a double-sided copper clad laminate, a single-sided copper clad laminate, a flexible PCB and an aluminum based PCB.

5. A row and column hybrid LED display matrix circuit according to any one of claims 1 to 3, wherein the LED lights are patch elements.

6. A row and column hybrid LED display matrix circuit according to any one of claims 1 to 3, wherein the LED lamp is a plug-in element.