CN210955963U

CN210955963U - LED display device and LED drive PCB board

Info

Publication number: CN210955963U
Application number: CN202020139302.8U
Authority: CN
Inventors: 任正
Original assignee: Nanjing Qinheng Microelectronics Co ltd
Current assignee: Nanjing Qinheng Microelectronics Co ltd
Priority date: 2020-01-21
Filing date: 2020-01-21
Publication date: 2020-07-07
Anticipated expiration: 2030-01-21

Abstract

The utility model discloses a LED display device and LED drive PCB board, including PCB board, LED lamp shade and at least one display element, each display element contains at least one paster LED group, paster LED group includes first paster LED, second paster LED at least, and first paster LED and second paster LED all weld on the PCB board; the positive pole of the first patch LED is connected with the negative pole of the second patch LED, and the negative pole of the first patch LED is connected with the positive pole of the second patch LED. The LED drive PCB is a single-sided wiring board. The utility model discloses only need two foot lamp pearls just can realize that the single faceplates walks the line, and need not to send out and walk the line between chip pad and the pin pad, simple structure, the PCB board preparation technology degree of difficulty is little, and it is small in quantity to lay wire, and the wiring degree of difficulty is low, and the cost of manufacture is low.

Description

LED display device and LED drive PCB board

Technical Field

The utility model relates to a LED display device especially relates to a LED display device and LED driver PCB board.

Background

Among the LED display device among the prior art, LED drive PCB board is mostly two-sided wiring, and the shortcoming of two-sided wiring lies in, need use the via hole to connect upper and lower circuit, need drill and electroplate hole copper, has increased manufacturing cost, and the quality of electroplating directly influences the reliability of product, simultaneously, adopts epoxy to encapsulate, reduces the qualification rate of product easily.

The existing single-side LED driving PCB is generally provided with one wiring side, a hole is formed in a line node of the wiring board surface, a pin of an electronic component penetrates into the hole from the other side, and then the pin is welded through welding materials. The copper-clad line that adopts in addition can follow and pass through between chip pad and the pin pad, and the cooperation uses tripod lamp pearl or four-foot lamp pearl to realize the individual layer wiring, but does not actually reduce the wiring quantity. In addition, the existing commonly used LED driving is a common cathode and common anode driving, and the driving method has the following disadvantages: each display unit needs to be controlled in multiple sections, and in addition, multiple display units need to be controlled on the display device, so that wiring of a single panel is difficult, and even a large number of additional jumper wires need to be additionally added; in order to compromise the routing of the single panel, the driving logic of the segment code network and the bit code network needs to be changed, which is not favorable for program migration.

SUMMERY OF THE UTILITY MODEL

Utility model purpose: in order to solve the problems of the single-panel wiring LED display device existing in the prior art, such as large wiring quantity, complex circuit and high cost, the utility model provides a LED display device.

Another object of the present invention is to provide a LED driver PCB board.

The technical scheme is as follows: an LED display device comprises a PCB, an LED lampshade and at least one display unit, wherein each display unit comprises at least one patch LED group, each patch LED group at least comprises a first patch LED and a second patch LED, and the first patch LED and the second patch LED are both welded on the PCB; the positive pole of the first patch LED is connected with the negative pole of the second patch LED, and the negative pole of the first patch LED is connected with the positive pole of the second patch LED.

The display unit further comprises a driving chip, wherein the output end of the driving chip comprises a bit code network and a segment code network, the bit code network is used for gating bits of the display unit, and the segment code network is used for gating different segments in the display unit; one end of each patch LED group in the same display unit is connected with the same bit code network, and the other end of each patch LED group in the same display unit is connected with the segment code network.

Furthermore, one-bit display unit includes a plurality of paster LED groups, and the other end that has two paster LED groups in a plurality of paster LED groups at least connects different segment code networks respectively.

Further, the display unit has a plurality of bits.

Furthermore, one end of the patch LED groups of the same section of different display units is connected with different bit code networks; the other ends of the patch LED groups of the same section of different display units are connected with the same section code network.

Furthermore, the display unit is one or more of an 8-shaped nixie tube, a Mi-shaped nixie tube, a plus-minus sign and a dot matrix.

Further, the PCB board is a single-sided wiring board.

An LED drive PCB comprises a wiring board surface, wherein the wiring board surface comprises a connecting circuit and a plurality of pin pad groups, and the pin pad groups are connected through the connecting circuit; each pin bonding pad group comprises two pin bonding pad pairs, and the pin bonding pad pairs are used for welding the SMD LEDs; every two pin bonding pads of two pin bonding pad pairs in the same pin bonding pad group are electrically connected with each other; one end of each pin bonding pad group is electrically connected, and the other ends of the pin bonding pad groups are electrically connected with each other.

Further, the PCB board is a single-sided wiring board.

Compared with the prior art, the utility model provides a LED display device organizes the structure of two positive and negative short circuits of paster LED through paster LED, realizes the high-low level of a signal and all can control different paster LED, only needs two foot lamp pearls just can realize that the single panel walks the line, need not to use tripod lamp pearl or four-foot lamp pearl, also need not to walk the line between luminous chip pad and pin pad, simplified structure, reduce cost.

The utility model provides a pair of LED driver PCB board has solved among the prior art single face LED driver PCB board preparation technology degree of difficulty big, the cost of manufacture is high, to the high problem of paster LED pin number requirement, reduces circuit quantity, reduces the wiring degree of difficulty, reduces the cost of manufacture.

Drawings

Fig. 1 is a schematic view of a PCB board of an LED display device of an embodiment;

FIG. 2 is a schematic diagram of a circuit connection of each SMD LED group in the one-bit nixie tube according to the embodiment;

fig. 3 is a schematic diagram of the wiring of each LED chip set in the one-bit nixie tube according to the embodiment.

Detailed Description

The invention is further explained below with reference to the figures and the specific embodiments.

In the present embodiment, an LED display device of a 16-bit 8-shaped nixie tube is taken as an example, and other types of display units are the same in principle, and commonly used are a nixie tube, an plus-minus number, a dot matrix, and the like.

An LED display device comprises a PCB board, an LED lampshade and a 16-bit nixie tube. As shown in fig. 1 and 2, each nixie tube contains 4 patch LED groups, and 8 patch LEDs correspond to 8 fields of the 8-shaped nixie tube. The surface mounted LED group comprises a first surface mounted LED and a second surface mounted LED, and the first surface mounted LED and the second surface mounted LED are both two-leg lamp beads; the first surface mounted LED and the second surface mounted LED are both welded on the PCB; the positive pole of the first patch LED is connected with the negative pole of the second patch LED, and the negative pole of the first patch LED is connected with the positive pole of the second patch LED.

The digital tube is characterized by further comprising a driving chip, wherein the output end of the driving chip comprises a bit code network and a segment code network, the bit code network is used for bit gating of the digital tube, and the segment code network is used for gating different segments in the digital tube.

As shown in fig. 2 and fig. 3, for the same nixie tube, one end of each chip LED group in the same nixie tube is connected to the same bit code network DIGx, the other end of each chip LED group in the same nixie tube is connected to different segment code networks SEG0, SEG1, SEG2 and SEG3, and LED driving is realized based on a time division multiplexing method. In fact, the other ends of the different patch LED groups can be connected to the same segment code network according to different types of nixie tubes and contents to be displayed, and the connection can be performed as required. For different nixie tubes, one end of the patch LED groups of the same segment of the different nixie tubes is connected with different bit code networks, for example, the patch LED groups corresponding to the same field of the first nixie tube and the second nixie tube are respectively connected with DIG0 and DIG 1; the other ends of the patch LED groups of the same segment of the different nixie tubes are connected to the same segment code network, for example, the patch LED groups corresponding to the same field of the first nixie tube and the second nixie tube are connected to SEG 0. Fig. 3 shows that the wiring of the digit tube portion is a single-sided wiring.

Therefore, the positive and negative connection methods of the two patch LEDs in each patch LED group are opposite, and the patch LEDs can be controlled by the least circuits as much as possible. The specific driving method comprises the following steps: when one bit code network is selected, the pin of the bit code network is set to be high level, the AFGD section outputs the corresponding segment code, the low level of the segment code network is effective, then the pin of the bit code network is set to be low level, the BECH section outputs the corresponding bit code, and the high level of the segment code network is effective. When the bit code network is not selected, the bit code network is in a high impedance state, and the LED cannot be lightened. The LED connecting circuit can also comprise a jumper resistor which is used for leading out a DIGx bit code network to facilitate the expansion and connection.

As shown in fig. 1, the PCB is a single-sided wiring board, the wiring board includes a connection circuit and a plurality of pin pad sets, and the pin pad sets are connected via the connection circuit; each pin bonding pad group comprises two pin bonding pad pairs, and the pin bonding pad pairs are used for welding patch LEDs of two pins; every two pin bonding pads of two pin bonding pad pairs in the same pin bonding pad group are electrically connected with each other, so that two patch LEDs in one patch LED group are in positive and negative short circuit; one end of each pin pad group is electrically connected and used for connecting a bit code network, and the other ends of the pin pad groups are electrically connected and used for connecting a segment code network.

Claims

1. An LED display device is characterized by comprising a PCB, an LED lampshade and at least one display unit, wherein each display unit comprises at least one patch LED group, each patch LED group at least comprises a first patch LED and a second patch LED, and the first patch LED and the second patch LED are both welded on the PCB; the positive pole of the first patch LED is connected with the negative pole of the second patch LED, and the negative pole of the first patch LED is connected with the positive pole of the second patch LED.

2. The LED display device of claim 1, further comprising a driver chip, wherein the output of the driver chip comprises a bit code network and a segment code network, the bit code network is used for bit gating of the display unit, and the segment code network is used for gating of different segments in the display unit; one end of each patch LED group in the same display unit is connected with the same bit code network, and the other end of each patch LED group in the same display unit is connected with the segment code network.

3. The LED display device of claim 2, wherein the one-bit display unit comprises a plurality of patch LED groups, and the other ends of at least two of the plurality of patch LED groups are respectively connected to different segment code networks.

4. The LED display device of any one of claims 1 to 3, wherein the display unit has a plurality of bits.

5. The LED display device of claim 4, wherein one end of the same segment of the patch LED groups of different display units is connected to different bit code networks; the other ends of the patch LED groups of the same section of different display units are connected with the same section code network.

6. The LED display device according to any one of claims 1 to 3, wherein the display unit is one or more of an 8-shaped nixie tube, a Mi-shaped nixie tube, an plus-minus sign and a dot matrix.

7. The LED display device of any one of claims 1 to 3, wherein the PCB is a single-sided wiring board.

8. The LED display device of claim 5, wherein the PCB board is a single-sided wiring board.

9. The LED driving PCB is characterized by comprising a wiring board surface, wherein the wiring board surface comprises a connecting circuit and a plurality of pin pad groups, and the pin pad groups are connected through the connecting circuit; each pin bonding pad group comprises two pin bonding pad pairs, and the pin bonding pad pairs are used for welding the SMD LEDs; every two pin bonding pads of two pin bonding pad pairs in the same pin bonding pad group are electrically connected with each other; one end of each pin bonding pad group is electrically connected, and the other ends of the pin bonding pad groups are electrically connected with each other.

10. The LED driving PCB of claim 9, wherein the PCB is a single-sided wiring board.