CN110599952A - LED display unit board - Google Patents
LED display unit board Download PDFInfo
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- CN110599952A CN110599952A CN201911007890.8A CN201911007890A CN110599952A CN 110599952 A CN110599952 A CN 110599952A CN 201911007890 A CN201911007890 A CN 201911007890A CN 110599952 A CN110599952 A CN 110599952A
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- hdi pcb
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- 239000011324 bead Substances 0.000 claims abstract description 16
- 238000004891 communication Methods 0.000 claims abstract description 4
- 239000011049 pearl Substances 0.000 claims abstract 2
- 238000012937 correction Methods 0.000 claims description 15
- 238000000034 method Methods 0.000 claims 1
- 238000012423 maintenance Methods 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 230000001808 coupling effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Led Device Packages (AREA)
- Control Of El Displays (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
Abstract
The present invention relates to an LED display unit board, comprising: the LED lamp comprises an HDI PCB, a plurality of mini 4-in-1 full-color LED lamp beads and a plurality of row-column integrated chips, wherein the surface of the HDI PCB is attached to the lamp surface of the HDI PCB; the row and column integrated chips are connected in series for communication; the row and column integrated chips are connected with a circuit on the HDI PCB; the plurality of mini 4-in-1 full-color LED lamp beads are connected with a circuit on the HDI PCB; the circuit on the HDI PCB board can send video data control information to the row-column integrated chips; a plurality of ranks unification integrated chip can convert received video data control information into control signal, and with the help of circuit control on the HDI PCB board the work of a plurality of mini4 closes 1 full-color LED lamp pearls for show video information with the form of image on the lamp face. The display unit board provided by the invention greatly reduces power consumption and heat, and is energy-saving and environment-friendly.
Description
Technical Field
The invention belongs to the technical field of LED display screens, and particularly relates to an LED display unit board.
Background
The small-spacing scheme of the LED display unit board in the prior art is designed to have the following shapes and colors:
1. display unit panel size: existing schemes have 12 blocks, 8 blocks and 2 blocks.
2. Led illuminant selection: the existing scheme of the Led luminous source has two types, namely a single lamp and a COB.
3. LED driving mode: the existing scheme basically adopts 4.2-5v voltage for power supply, and the red, green and blue light-emitting chips are driven in a positive mode.
4. LED driving chip: the existing scheme adopts a constant current chip and a line mos tube to be driven separately.
Disadvantages of the prior art solutions
1. Too many display unit plates result in increased cost and poor splicing effect; too few unit plates can result in high production and processing precision and increased maintenance cost.
2. The single encapsulation of the light emitting source results in poor protection and increases the maintenance cost of the production cost; the COB packaging light-emitting source is too high in production cost and maintenance cost, and the light-emitting uniformity is difficult to perfectly solve.
3. The LED red light is about 2v voltage, the green and blue are about 3v voltage, the power consumption of the whole screen is increased due to the 4-5v voltage power supply in the existing scheme, the red light, the green and the blue are driven by the sun to cause the voltage difference of the red light, the temperature is increased due to the conversion of the red light, the green and the blue into heat, the regional color cast is caused, and the service life is prolonged.
4. The conventional driving chip is used for constant-current driving and line mos tubes, so that the layout of small intervals is difficult, the PCB cost is increased, the coupling is serious due to the separation of the chips, the fault rate of excessive devices is increased, and the maintenance cost is increased.
Disclosure of Invention
Technical problem to be solved
In order to solve the above problems of the prior art, the present invention provides an LED display unit panel.
(II) technical scheme
In order to achieve the purpose, the invention adopts the main technical scheme that:
an LED display cell plate comprising: the HDI PCB comprises an HDI PCB, a plurality of mini4 in-1 full-color LED lamp beads and a plurality of row and column integrated chips, wherein the surface of the HDI PCB is attached to the lamp surface of the HDI PCB;
the row and column integrated chips are connected in series for communication;
the row and column integrated chips are connected with a circuit on the HDI PCB;
the mini4 in 1 full-color LED lamp beads are connected with a circuit on the HDI PCB;
the circuit on the HDI PCB board can send video data control information to the row-column integrated chips;
the row and column integrated chips can convert received video data control information into control signals, and the operation of the mini 4-1 full-color LED lamp beads is controlled by means of a circuit on the HDI PCB so that the video information can be displayed on the lamp surface in the form of images.
Preferably, each mini4 and 1 full-color LED lamp bead comprises four pins;
the four pins are respectively a red lamp input pin, a blue lamp input pin, a green lamp input pin and a cathode output pin;
the red light input pin is connected with 2-3V input voltage;
the blue lamp input pin and the green lamp input pin are connected with 3-4V input voltage.
Preferably, a bus transceiver and a flah module are further arranged on the HDI PCB;
the bus transceiver is respectively connected with the plurality of row-column integrated chips and the flash module by virtue of a circuit on the HDI PCB;
the bus transceiver is also connected with a control system;
the control system can transmit video data control information and correction storage information to the bus transceiver;
the bus transceiver can send the received video data control information to the plurality of row-column integrated chips;
the bus transceiver can send the received correction storage information to the flash module;
the flash module can store the received correction storage information in the intelligent storage chip and send the stored correction storage information to a new control system by means of the bus transceiver after the control system is replaced.
Preferably, each row-column-in-one integrated chip comprises 16 row scan pins and 16 groups of column scan pins;
the 16 row scanning pins and the 16 groups of column scanning pins control 16 x 16 mini4 in 1 full-color LED lamp beads;
each group of the column scan pins comprises: a red light output control pin, a blue light output control pin and a green light output control pin.
Preferably, each row-column-in-one integrated chip is provided with a signal input pin and a signal output pin;
the signal input pin of one row and column integrated chip is connected with a circuit on the HDI PCB, and the signal output pin is connected with the signal input pin of an adjacent row and column integrated chip.
Preferably, each row-column-in-one integrated chip is provided with a red white balance control pin, a green white balance control pin and a blue white balance control pin.
Preferably, the red light input pin is connected with an input voltage of 2.8V;
the blue lamp input pin and the green lamp input pin are connected with an input voltage of 3.8V.
(III) advantageous effects
The invention has the beneficial effects that: the LED display unit board provided by the invention has the following beneficial effects:
1. high integration modularization, simple maintenance and high-precision seamless splicing.
2. A chip area of the row-column integrated chip carries an independent area block, and the chip area is connected through serial signals, so that the PCBlayout is convenient, the number of layers is reduced, and the cost and the design cycle are reduced.
3. The row-column integrated chip integrates the constant current tube and the mos, and each block of the row tube is independently loaded, so that the coupling effect among devices is reduced, and a better display effect is realized.
4. The cathode-sharing scheme greatly reduces power consumption and heat, and is more energy-saving and environment-friendly.
5. The four-in-one surface-mounted lamp beads are adopted, and the problem that small space is easy to collide is solved under the condition that the production cost is not increased.
6. And the integrated IC is adopted, so that the failure rate and the coupling phenomenon caused by excessive chips are reduced.
7. The unit board is integrated with an intelligent storage chip, and can store, manage and monitor correction data and lamp panel information.
Drawings
FIG. 1 is a schematic diagram of signal transmission relationship in an embodiment of an LED display unit board according to the present invention;
FIG. 2 shows an embodiment of an LED display unit board according to the present invention
FIG. 3 is a schematic diagram of a pin layout of a row-column-in-one integrated chip in an embodiment of an LED display unit board provided by the present invention.
Detailed Description
For the purpose of better explaining the present invention and to facilitate understanding, the present invention will be described in detail by way of specific embodiments with reference to the accompanying drawings.
The embodiment discloses an LED display unit board, including: HDI PCB board, table are pasted a plurality of mini4 on the lamp face of HDI PCB board closes 1 full-color LED lamp pearl and a plurality of ranks unification integrated chip.
The four-in-one surface-mounted lamp bead is adopted, so that the problem that small space is easy to collide can be solved under the condition that the production cost is not increased.
In detail, the row and column integrated chips are connected in series for communication. Before this point, it should be noted that the HDI PCB of the present embodiment is integrated with a plurality of circuits, which are used to connect various components mounted on the HDI PCB.
The row and column integrated chips are communicated in series through circuits on the HDI PCB.
Specifically, a plurality of ranks unification integrated chip with circuit connection on the HDI PCB board.
And the plurality of mini4 combined 1 full-color LED lamp beads are connected with a circuit on the HDI PCB.
And the circuit on the HDI PCB board can send video data control information to the row and column integrated chips.
The row and column integrated chips can convert received video data control information into control signals, and the operation of the mini 4-1 full-color LED lamp beads is controlled by means of a circuit on the HDI PCB so that the video information can be displayed on the lamp surface in the form of images.
It should be noted that: in this embodiment, each mini4 closes 1 full-color LED lamp pearl and all includes four pins.
The four pins are respectively a red lamp input pin, a blue lamp input pin, a green lamp input pin and a cathode output pin.
And the red lamp input pin is connected with 2-3V input voltage.
The blue lamp input pin and the green lamp input pin are connected with 3-4V input voltage.
Of course, in this embodiment, the optimal input voltage is also given as:
and the red lamp input pin is connected with 2.8V input voltage.
The blue lamp input pin and the green lamp input pin are connected with an input voltage of 3.8V.
Compared with the existing common-cathode scheme, the common-cathode scheme reduces the input voltage, greatly reduces the power consumption and heat, and is more energy-saving and environment-friendly.
In this embodiment, still be equipped with bus transceiver and flah module on the HDI PCB board.
The bus transceiver is connected with the plurality of row and column integrated chips and the flash module by means of a circuit on the HDI PCB respectively.
As shown in fig. 1: the bus transceiver described in this example is also connected to a control system.
The control system is capable of transmitting video data control information and correction storage information to said bus transceiver.
The bus transceiver can send the received video data control information to the plurality of row and column integrated chips.
The bus transceiver can send the received correction storage information to the flash module;
the flash module can store the received correction storage information in the intelligent storage chip and send the stored correction storage information to a new control system by means of the bus transceiver after the control system is replaced.
The LED display unit board provided in this embodiment integrates an intelligent memory chip (i.e., a flash module), and can store, manage, and monitor correction data and lamp panel information.
Fig. 2 is a circuit diagram of a flash module, in which cs is a chip select signal, clk is a data clock, SI is an input, and SO is an output, and functions to transmit a storage signal.
In specific application, after the LED display unit board in this embodiment is connected to the control system, data correction is performed first, and then the display work of the LED display unit board can be normally controlled.
As shown in fig. 3: in this embodiment, each row-column-in-one integrated chip includes 16 row scan pins and 16 sets of column scan pins.
It should be noted that: here, the 16 row scanning pins are S01-S16 in the figure, the 16 groups of column scanning pins are G00, R00, and B00 in the figure as the first group, and G15, R15, and B15 are the 16 th group of column scanning pins.
The 16 row scanning pins and the 16 groups of column scanning pins control 16 x 16 mini4 in 1 full-color LED lamp beads;
each group of the column scan pins comprises: a red light output control pin, a blue light output control pin and a green light output control pin.
The chip integrating the row scanning pins and the column scanning pins on one IC is adopted, so that the failure rate and the coupling phenomenon caused by excessive chips can be reduced.
Finally, it should be noted that each row-column-in-one integrated chip provided in the present embodiment is provided with a signal input pin and a signal output pin.
The signal input pin of one row and column integrated chip is connected with a circuit on the HDI PCB, and the signal output pin is connected with the signal input pin of an adjacent row and column integrated chip. Each row-column integrated chip is provided with a red white balance control pin, a green white balance control pin and a blue white balance control pin.
The technical principles of the present invention have been described above in connection with specific embodiments, which are intended to explain the principles of the present invention and should not be construed as limiting the scope of the present invention in any way. Based on the explanations herein, those skilled in the art will be able to conceive of other embodiments of the present invention without inventive efforts, which shall fall within the scope of the present invention.
Claims (7)
1. An LED display unit plate is characterized in that,
the method comprises the following steps: the LED lamp comprises an HDI PCB, a plurality of mini 4-in-1 full-color LED lamp beads and a plurality of row-column integrated chips, wherein the surface of the HDI PCB is attached to the lamp surface of the HDI PCB;
the row and column integrated chips are connected in series for communication;
the row and column integrated chips are connected with a circuit on the HDI PCB;
the plurality of mini 4-in-1 full-color LED lamp beads are connected with a circuit on the HDI PCB;
the circuit on the HDI PCB board can send video data control information to the row-column integrated chips;
a plurality of ranks unification integrated chip can convert received video data control information into control signal, and with the help of circuit control on the HDI PCB board the work of a plurality of mini4 closes 1 full-color LED lamp pearls for show video information with the form of image on the lamp face.
2. Display cell plate according to claim 1,
each mini 4-in-1 full-color LED lamp bead comprises four pins;
the four pins are respectively a red lamp input pin, a blue lamp input pin, a green lamp input pin and a cathode output pin;
the red light input pin is connected with 2-3V input voltage;
the blue lamp input pin and the green lamp input pin are connected with 3-4V input voltage.
3. Display cell plate according to claim 2,
the HDI PCB is also provided with a bus transceiver and a flah module;
the bus transceiver is respectively connected with the plurality of row-column integrated chips and the flash module by virtue of a circuit on the HDI PCB;
the bus transceiver is also connected with a control system;
the control system can transmit video data control information and correction storage information to the bus transceiver;
the bus transceiver can send the received video data control information to the plurality of row-column integrated chips;
the bus transceiver can send the received correction storage information to the flash module;
the flash module can store the received correction storage information in the intelligent storage chip and send the stored correction storage information to a new control system by means of the bus transceiver after the control system is replaced.
4. Display cell plate according to any one of claims 1 to 3,
each row-column-in-one integrated chip comprises 16 row scanning pins and 16 groups of column scanning pins;
the 16 row scanning pins and the 16 groups of column scanning pins control 16 multiplied by 16 mini4 in 1 full-color LED lamp beads;
each group of the column scan pins comprises: a red light output control pin, a blue light output control pin and a green light output control pin.
5. Display cell plate according to claim 4,
each row-column integrated chip is provided with a signal input pin and a signal output pin;
the signal input pin of one row and column integrated chip is connected with a circuit on the HDI PCB, and the signal output pin is connected with the signal input pin of an adjacent row and column integrated chip.
6. Display cell plate according to claim 4,
each row-column integrated chip is provided with a red white balance control pin, a green white balance control pin and a blue white balance control pin.
7. Display cell plate according to claim 2,
the red light input pin is connected with 2.8V input voltage;
the blue lamp input pin and the green lamp input pin are connected with an input voltage of 3.8V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911007890.8A CN110599952A (en) | 2019-10-22 | 2019-10-22 | LED display unit board |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911007890.8A CN110599952A (en) | 2019-10-22 | 2019-10-22 | LED display unit board |
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| CN110599952A true CN110599952A (en) | 2019-12-20 |
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| CN201911007890.8A Pending CN110599952A (en) | 2019-10-22 | 2019-10-22 | LED display unit board |
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Application publication date: 20191220 |
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