CN204808834U

CN204808834U - LED lamp plate

Info

Publication number: CN204808834U
Application number: CN201520517177.9U
Authority: CN
Inventors: 刘德福; 梁伟; 王伙荣
Original assignee: Xian Novastar Electronic Technology Co Ltd
Current assignee: Xian Novastar Electronic Technology Co Ltd
Priority date: 2015-07-16
Filing date: 2015-07-16
Publication date: 2015-11-25
Anticipated expiration: 2025-07-16

Abstract

The utility model relates to a LED lamp plate, include: circuit board and input interface, go scanning circuit, many column rules, many alignments and the electric connection of setting on the circuit board many column rules with the LED array of many alignments, line scanning circuit's output electricity is connected many column rules. Especially, LED lamp plate still includes: data processing and control signal produce the module, its input electricity connection input interface, and a control signal output of data processing and control signal production module is connected to the scanning circuit electricity of just going, and general LED driver chip, the 2nd control signal output and data output end of data processing and control signal production module is connected to its input electricity, just general LED driver chip's output is connected to many alignment electricity. The utility model discloses the combination that utilizes data processing low -priced relatively and control signal to produce module and general LED driver chip replaces the special LED driver chip that the price is more expensive, therefore can reduce cost.

Description

LED lamp panel

Technical field

The utility model relates to technical field of LED display, particularly a kind of LED lamp panel.

Background technology

Existing LED display synchro system comprises video source, sending card, receiving card and LED display, and wherein LED display is formed by multiple box body splicing.Each casing comprises multiple LED lamp panel and is configured with receiving card, and receiving card is electrically connected to each LED lamp panel in casing.

Sending card is receiving vision signal after treatment, receiving card is sent data to by netting twine or other media, the data that receiving card receives sending card to be provided carry out view data torsion, cut graded tasks after, view data is sent to the LED drive chip in each LED lamp panel through winding displacement, and send corresponding control signal to LED lamp panel, thus complete the procedure for displaying of whole image.

LED drive chip can be divided into Universal LED driving chip and special LED drive chip.In traditional full-color LED display screen synchro system, LED drive chip typically adopts MBI5153 special chip, winding displacement mode is adopted to carry out data transmission between receiving card and LED lamp panel, built-in SRAM on MBI5153 special chip and be integrated with data display and various steering order, the signal such as sent by receiving card comprises organizes RGB data more, additional data input clock signal CLK, data latch signal Lat, data output enable signal OE, row address signal A, B, the control signals such as C, after MBI5153 chip receives these data and control signal, according to the requirement of display, generate corresponding display and control data, final driving LED display screen correctly shows.

But, special LED drive chip is MBI5153 chip such as, for Universal LED driving chip, although function ratio its price more complete is relatively expensive, especially for the LED display of reduced size, this special LED drive chip is adopted just to waste especially.In addition, adopt special LED drive chip to make the transmission mode between receiving card and LED lamp panel single, winding displacement can only be adopted to transmit, this is for large scale LED display, and required winding displacement is just many, causes wiring more complicated.

Utility model content

Therefore, for deficiency of the prior art, the utility model proposes a kind of LED lamp panel.

Particularly, a kind of LED lamp panel that the utility model embodiment proposes, comprise: circuit board and the input interface be arranged on described circuit board, line-scan circuit, many lines, many alignments and the LED array being electrically connected described many lines and described many alignments, described many lines of output electrical connection of described line-scan circuit.Especially, described LED lamp panel also comprises: data processing and control signal generation module, the input of described data processing and control signal generation module is electrically connected described input interface, and described line-scan circuit is electrically connected the first control signal output terminal of described data processing and control signal generation module; And Universal LED driving chip, the input of described Universal LED driving chip is electrically connected the second control signal output terminal and data output end of described data processing and control signal generation module, and described many alignments are electrically connected the output of described Universal LED driving chip.

In an embodiment of the present utility model, described data processing and control signal generation module are programmable logic device (PLD).

In an embodiment of the present utility model, described data processing and control signal generation module are application-specific IC.

In an embodiment of the present utility model, described input interface is winding displacement interface.

In an embodiment of the present utility model, described input interface is LVDS interface or UART serial ports.

In an embodiment of the present utility model, described LED array comprises multiple color LED point.

In an embodiment of the present utility model, described Universal LED driving chip is without built-in SRAM and data seal in and removing from mould LED drive chip.

As from the foregoing, the utility model embodiment adopts the combination of relatively inexpensive Universal LED driving chip and data processing and control signal generation module (such as FPGA or ASIC) to replace the more expensive special LED drive chip of price to carry out display driver to show, therefore can reduce the cost of LED lamp panel.In addition, it, compared to the technical scheme adopting special LED drive chip, can reduce the complexity of wiring, because for special LED drive chip, its interface type solidifies, and such as MBI5153 chip can only receive the data that winding displacement transmission comes.

By the detailed description below with reference to accompanying drawing, other side of the present utility model and feature become obvious.But it should be known that this accompanying drawing is only the object design of explanation, instead of as the restriction of scope of the present utility model, this is because it should with reference to additional claim.Should also be appreciated that, unless otherwise noted, unnecessaryly draw accompanying drawing to scale, they only try hard to structure described herein and flow process are described conceptually.

Accompanying drawing explanation

Below in conjunction with accompanying drawing, embodiment of the present utility model is described in detail.

Fig. 1 is the structural representation of the LED lamp panel of the utility model embodiment.

Fig. 2 is another viewing angle constructions schematic diagram of the LED lamp panel of the utility model embodiment.

Fig. 3 is the programmable logic device (PLD) of the utility model embodiment or the module diagram of application-specific IC.

Fig. 4 is the submodule schematic diagram of the display module of the utility model embodiment.

Embodiment

For enabling above-mentioned purpose of the present utility model, feature and advantage become apparent more, are described in detail embodiment of the present utility model below in conjunction with accompanying drawing.

Refer to Fig. 1 and Fig. 2, a kind of LED lamp panel 10 that the utility model embodiment proposes is suitable for being electrically connected with receiving card 20 and comprising: circuit board 11 and be arranged on the input interface 11 of circuit board 12, programmable logic device (PLD) (ProgrammableLogicDevice) or application-specific IC (ApplicationSpecificIntegratedCircuit, ASIC) 13, Universal LED driving chip 15, line-scan circuit 17, many line L1 ~ Lm, many alignment C1 ~ Cn and LED array 19.

Wherein, LED lamp panel 10 connects via input interface 12 and such as connects receiving card 20 by winding displacement.The input electrical connection input interface 12 of programmable logic device (PLD) or application-specific IC 13, the input of its first control signal output terminal electrical connection line-scan circuit 17, and the input of its second control signal output terminal and data output end electrical connection Universal LED driving chip 15.The output of line-scan circuit 17 is electrically connected many line L1 ~ Lm, the output of Universal LED driving chip 15 is electrically connected many alignment C1 ~ Cn, LED array 19 comprises multiple LED point, the such as multiple color LED point such as red (R), green (G), blue (B), the anode of each color LED point is electrically connected a line corresponding in many line L1 ~ Lm and cathodic electricity connects an alignment corresponding in many alignment C1 ~ Cn.

In the present embodiment, LED lamp panel 10 is provided with Universal LED driving chip 15 for display driver, because Universal LED driving chip 15 is relative to special LED drive chip, it is without built-in SRAM (StaticRandomAccessMemory, static RAM), and be receive data by bit (bit); When receiving card 20 band carries multiple LED lamp panel 10, receiving card 20 transmit required image data will to multiple LED lamp panel 10 needs the long time, and transmission speed is slow, and display effect is poor.Therefore, in the present embodiment, a programmable logic device (PLD) or application-specific IC 13 are set in LED lamp panel 10, view data is encapsulated framing by receiving card 20, be sent to programmable logic device (PLD) in LED lamp panel 10 or application-specific IC 13 stores, and produce LED lamp panel 10 by programmable logic device (PLD) or application-specific IC 13 and show required control signal, to improve transfer efficiency and display effect.In addition, the programmable logic device (PLD) of the present embodiment is such as FPGA (FieldProgrammableGateArray, field programmable gate array); Universal LED driving chip 15 is such as 74HC595 family chip, and it has 8 latches, SI PO shift register and ternary output functions; Certainly, the utility model, not as limit, also can adopt other without built-in SRAM and data seal in and the Universal LED driving chip of removing from mould.

Refer to Fig. 3, programmable logic device (PLD) or application-specific IC 13 comprise control module 132, memory module 134 and display module 136.Wherein, control module 132 receives the view data (such as organizing RGB data) and control signal (such as serial date transfer clock signal clk, data latch signal Lat, data output enable signal OE, row address signal A that are sended over by receiving card 20 more, B, C etc.), and view data such as RGB data is sent to memory module 134 such as RAM stores; Display module 136 reads out view data from memory module 134, according to the sequential logic of Universal LED driving chip 15, generates data stream and the control signal of carrying out display driver for Universal LED driving chip 15.

Refer to Fig. 4, display module 136 comprises control signal generation unit 1361, control module 1363 and data processing unit 1365.Wherein, control signal generation unit 1361 generates control signal according to the sequential logic of Universal LED driving chip 15, also be row address signal A, B, C, data output enable signal OE, data latch signal Lat and serial date transfer clock signal clk etc., utilize row address signal A, B, C control lines sweep circuit 17 gating line L1 ~ Lm one by one, utilizes data output enable signal OE, data latch signal Lat and serial date transfer clock signal clk to control Universal LED driving chip 15 and works.Control signal control data processing unit 1365 needed for the Universal LED driving chip 15 such as the data output enable signal OE that control module 1363 produces with reference to control signal generation unit 1361, data latch signal Lat and serial date transfer clock signal clk processes to obtain RGB gradation data to the view data read out from memory module 134, and RGB gradation data is transmitted according to the serial input form of Universal LED driving chip 15.

In brief, the utility model embodiment is by programmable logic device (PLD) or application-specific IC 13 are combined as data processing and control signal generation module and Universal LED driving chip 15 the special LED drive chip come on alternative traditional LED lamp plate, thus can reduce cost of products.

In other embodiments, connection between receiving card 20 and LED lamp panel 10 is not limited to aforesaid winding displacement and connects, also namely input interface 11 is not limited to winding displacement interface, also LVDS (LowVoltageDifferentialSignaling can be made into, Low Voltage Differential Signal) interface or UART (UniversalAsynchronousReceiver/Transmitter, UART Universal Asynchronous Receiver Transmitter) serial ports, thus receiving card 20 only no longer can transmit aforementioned control signals to LED lamp panel 10 to LED lamp panel 10 transmit image data.

In sum, the utility model above-described embodiment adopts the combination of relatively inexpensive Universal LED driving chip and data processing and control signal generation module (such as FPGA or ASIC) to replace the more expensive special LED drive chip of price to carry out display driver, therefore can reduce the cost of LED lamp panel.In addition, it, compared to the technical scheme adopting special LED drive chip, can reduce the complexity of wiring, because for special LED drive chip, its interface type solidifies, and such as MBI5153 chip can only receive the data that winding displacement transmission comes.

So far, apply specific case herein and set forth the principle of LED lamp panel of the present utility model and embodiment, the explanation of above embodiment just understands method of the present utility model and core concept thereof for helping; Simultaneously; for one of ordinary skill in the art; according to thought of the present utility model; all will change in specific embodiments and applications; in sum; this description should not be construed as restriction of the present utility model, and protection domain of the present utility model should be as the criterion with appended claim.

Claims

1. a LED lamp panel, comprise: circuit board and the input interface be arranged on described circuit board, line-scan circuit, many lines, many alignments and the LED array being electrically connected described many lines and described many alignments, described many lines of output electrical connection of described line-scan circuit; It is characterized in that, described LED lamp panel also comprises:

Data processing and control signal generation module, the input of described data processing and control signal generation module is electrically connected described input interface, and described line-scan circuit is electrically connected the first control signal output terminal of described data processing and control signal generation module; And

Universal LED driving chip, the input of described Universal LED driving chip is electrically connected the second control signal output terminal and data output end of described data processing and control signal generation module, and described many alignments are electrically connected the output of described Universal LED driving chip.

2. LED lamp panel as claimed in claim 1, it is characterized in that, described data processing and control signal generation module are programmable logic device (PLD).

3. LED lamp panel as claimed in claim 1, it is characterized in that, described data processing and control signal generation module are application-specific IC.

4. LED lamp panel as claimed in claim 1, it is characterized in that, described input interface is winding displacement interface.

5. LED lamp panel as claimed in claim 1, it is characterized in that, described input interface is LVDS interface or UART serial ports.

6. LED lamp panel as claimed in claim 1, it is characterized in that, described LED array comprises multiple color LED point.

7. LED lamp panel as claimed in claim 1, is characterized in that, described Universal LED driving chip is without built-in SRAM and data seal in and removing from mould LED drive chip.