LED lamp adopting buf module and address writing method

Abstract

The application discloses an LED lamp and an address writing method using a BUF module, comprising a plurality of conductive connected LED units, the LED unit comprising a control chip and a plurality of LED light emitting chips electrically connected with the control chip, the control chip being provided with a BUF module at a signal input end and an output end, and the control chip being used for supervising the BUF module; the control chip realizes entering control or exiting control of the BUF module through instruction receiving; when the BUF module is in an entering state, the control chip is in an instruction receiving state, and the plurality of LED units can realize signal transmission through the conduction of the BUF module; when the BUF module is in an exiting state, the control chip enters an address writing mode, and the control chip completes address burning of the corresponding LED unit through instruction receiving. The application optimizes the adoption of the BUF module, realizes the active switching of address burning or interruption of the control chip in the LED unit through the input of different instructions, and makes the LED lamp satisfy address burning of a serial protocol or signal transmission in a parallel protocol.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of LED, in particular to an LED lamp adopting a BUF module and an address writing method. BACKGROUND

[0002] The DMX512 protocol is a digital multiplexing protocol formulated by the American Theatre Technical Association, which is a dimming protocol between a transmitter and a dimming device, and is a general signal control protocol for digital devices in the lighting field. In an LED chip system based on the DMX512 protocol, one DMX512 control device can control multiple LED chips. DMX485, i.e., RS485 bus, is used for signal transmission between the DMX512 controller and the LED chip. One DMX512 data packet includes a start code and 512 data frames, i.e., each packet includes 513 bytes. Each data frame includes one start bit, eight data bits and two stop bits. The signal data transmission rate of DMX512 is 250 Kbps, and the data frame has a width of 4 µs. It takes 44 µs to send one frame, and it takes about 23 ms to send a data packet of 513 bytes.

[0003] The control chip of the LED unit in the prior art stores a fixed address, and the control chip of the LED unit only receives the frame data corresponding to the address and displays according to the received frame data. Therefore, the LED chip system based on the DMX512 protocol can well control the LED chip in a digital manner. However, the write address line in the existing three-wire LED lamp string has been automatically fixed during production, so that the fixed address corresponding to the internal address of the finished LED unit cannot be changed, which leads to great limitations in use. Moreover, the existing LED unit usually needs to be based on the DMX512 controller to realize lighting control, and cannot be matched with other communication protocols. In order to avoid this defect, the existing production adopts a five-wire LED lamp string, which includes a VCC main line, a GND main line, a write address line A, a write address line B and a DATA line, resulting in high cost of wire material. Moreover, due to the influence of the epidemic, the prices of upstream raw materials are rising, involving multiple industries such as metal, rare metal, aquaculture, chemical industry and medical treatment. A large amount of wire material is needed in the LED unit, especially in the LED lamp string. Due to the rising factors of copper price and plastic, the cost of wire material is also rising continuously, which affects the manufacturing cost of enterprises. SUMMARY

[0004] In view of the above problems, the present application aims to provide an LED lamp adopting a BUF module and an address writing method, which optimizes the adoption of the BUF module, so that the control chip in the LED unit can meet the address writing and programming requirements of the serial protocol or the signal transmission requirements of the parallel protocol.

[0005] The technical problem solved by the present application can be implemented by the following technical solutions:

[0006] An LED lamp using a BUF module, comprising a plurality of electrically conductive connected LED units, the LED unit comprising a control chip and a plurality of LED light emitting chips electrically connected with the control chip, the control chip being provided with a BUF module at the signal input end and the output end, the control chip being used to supervise the BUF module; the control chip realizes the entering control or the exiting control of the BUF module through instruction receiving; when the BUF module is in the entering state, the control chip is in the instruction receiving state, and a plurality of LED units can realize signal transmission through the conduction of the BUF module; when the BUF module is in the exiting state, the control chip enters the address writing mode, and the control chip completes the address burning of the corresponding LED unit through instruction receiving.

[0007] When a plurality of electrically conductive connected LED units are initially powered on, the BUF module is in the entering state, and the control chip is continuously in the state of listening to the input end.

[0008] The first signal support and the second signal support are connected through the same signal line, and a cutting gap is arranged between the first signal support and the second signal support.

[0009] The LED unit comprises a first support and a second support, the first support is used to mount a plurality of LED light emitting chips, the second support is used to mount the control chip, and any one of the first support and the second support is used to connect the VDD main line, and the other is used to connect the GND main line, and the LED unit further comprises a first signal support and a second signal support, the signal line located at the input end is connected with the first signal support and then connected with the input end of the control chip, and the signal line located at the output end is connected with the second signal support and then connected with the output end of the control chip, and the first signal support and the second signal support are not conductive.

[0010] The first signal support and the second signal support are connected through the same signal line, and a cutting gap is arranged between the first signal support and the second signal support.

[0011] The first signal support and the second signal support are connected through the same signal line, and a cutting gap is arranged between the first signal support and the second signal support.

[0012] A writing address method based on the LED lamp using the BUF module, comprising a controller,

[0013] S1, the LED lamp completes power-on, at this time, each LED unit in the LED lamp is in the entering state of the BUF module; S2, the controller completes the instruction input of the exit state of the BUF module, so that each LED unit is in the exit state of the BUF module, at this time, the control chip enters the address writing mode; S3, the address data input is completed, and the plurality of LED units record the corresponding addresses in turn from the beginning to the end until the complete input of the address data or the completion of the recording of the corresponding addresses by all the LED units.

[0014] The instructions of the controller are divided into entering mode instructions, exit mode instructions and normal mode instructions, when the address data contains the entering mode instructions, the BUF module of the LED unit receiving the instructions becomes the entering state, and the subsequent address data is ignored.

[0015] When the control chip of the LED unit in the entering state of the BUF module receives the normal mode instructions, the BUF module remains in the entering state and processes the subsequent data according to the protocol definition; when the control chip of the LED unit in the entering state of the BUF module receives the exit mode instructions, the input of the address data is restarted.

[0016] Compared with the prior art, the present application has the following beneficial effects: the present application optimizes the adoption of the BUF module, actively switches the address writing or interruption of the control chip in the LED unit through the input of different instructions, so that the LED lamp can meet the address writing of the serial protocol or serve as the signal transmission in the parallel protocol.

[0017] The features of the present application can be clearly understood by referring to the drawings and the detailed description of the preferred embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a schematic diagram of the LED lamp control structure of the present application;

[0019] Figure 2 It is a schematic diagram of the LED unit control structure of the present application;

[0020] Figure 3 It is a schematic diagram of the overall structure of the LED unit of the present application Figure 1

[0021] Figure 4 It is a schematic diagram of the internal structure of the LED unit of the present application;

[0022] Figure 5 It is a schematic diagram of the connection structure of adjacent LED units of the present application Figure 1

[0023] Figure 6 ​​Schematic diagram of adjacent LED unit connection structure of the present application Figure 2 ;

[0024] Figure 7 Schematic diagram of adjacent LED unit connection structure of the present application Figure 3 ;

[0025] Figure 8 Schematic diagram of adjacent LED unit connection structure of the present application Figure 4 ;

[0026] Figure 9 Schematic diagram of adjacent LED unit connection structure of the present application Figure 5 . DETAILED DESCRIPTION

[0027] In order to make the technical means, creative features, purposes and effects of the present application easy to understand, the present application is further described below in combination with specific drawings.

[0028] Embodiment 1

[0029] In combination with Figures 1 to 2 the present application discloses an LED lamp using a BUF module, comprising a plurality of electrically conductive connected LED units 2, the LED unit 2 comprising a control chip 24 and a plurality of LED light emitting chips 25 electrically connected with the control chip 24, the control chip 24 usually using an IC chip, wherein, preferably, the number of LED light emitting chips 25 is 2 or more than 2, according to product requirements, different light emitting chip arrangement assemblies can be arranged, which can be 2, 3, 4, etc., according to the requirements of LED unit light emission, the color combination can be arranged according to the requirements; for example, the common number of three LED light emitting chips 25 is divided into red light chip, yellow light chip and blue light chip.

[0030] Among them, the control chip 24 is provided with a BUF module 23 at the signal input end 21 and the output end 22, the control chip 24 is used to supervise the BUF module 23, wherein the BUF module 23 is specifically an analog switch or a virtual switch, the conduction or disconnection of the module is used to make the control chip 24 can be in different working state, so as to complete the signal instruction input combined with the control line, realize the address burning of serial protocol or as the signal transmission in parallel protocol; the control chip 24 realizes the entering control or exiting control of the BUF module 23 through instruction receiving, when the plurality of electrically conductive connected LED units 2 are initially powered on, the BUF module 23 can be in entering state or exiting, and the control chip 24 continuously is in the state of listening to the input end.

[0031] When the BUF module 23 is in the entering state, the control chip 24 is in the instruction receiving state, and the plurality of LED units 2 can realize signal transmission through the on of the BUF module 23, so as to facilitate the signal transmission by using the parallel protocol and the parallel control of the plurality of LED units 2.

[0032] When the BUF module 23 is in the exiting state, the control chip 24 enters the address writing mode, and the control chip 24 completes the address burning of the corresponding LED unit 2 through the instruction receiving. After the burning is completed, the light control of each LED unit 2 in the LED lamp is realized through the serial protocol.

[0033] By using the BUF module 23, the active switching of the address burning or the interruption of the control chip in the LED unit 2 is realized through the input of different instructions, so that the LED lamp can satisfy the address burning of the serial protocol or the signal transmission in the parallel protocol.

[0034] When the plurality of conductive connected LED units 2 are initially powered on, the BUF module 23 is in the entering state, and the control chip 24 is continuously in the state of detecting the input end. Meanwhile, preferably, when the power is reset, the BUF module 23 can be in the entering state or the exiting state, and the entering state mode is preferably adopted. When the LED lamp normally displays, if the power is reset due to an accident, if the BUF module 23 is in the exiting state, the normal display of the LED lamp is affected.

[0035] The instructions can be divided into the entering mode instruction, the exiting mode instruction and the general mode instruction. The definition of the entering mode instruction is that after the control chip 24 completes the entering mode instruction receiving, the control chip 24 is converted to the entering mode after receiving the instruction length of the burning data. The definition of the exiting mode instruction is that after the control chip 24 completes the exiting mode instruction receiving, the control chip 24 is immediately switched from the entering state to the exiting state. The definition of the general mode instruction is that as long as it is not the entering mode instruction and the exiting mode instruction, it can be called the general mode instruction, and whether the BUF module 23 in the control chip 24 is in the entering state or the exiting state remains unchanged.

[0036] The entering mode instruction is explained as follows: 1. The BUF module 23 in the control chip 24 is in the entering state, and the control chip 24 is continuously in the state of detecting the input end and waiting for the instruction input; 2. If the exiting mode instruction is detected by the input end, the BUF module 23 is switched to the exiting state, otherwise it is always in the entering state; 3. If the entering mode instruction is detected by the input end 21, the subsequent data is ignored, and the BUF module 23 remains in the entering state; 4. If the general mode instruction is detected by the input end 21, the subsequent data is processed according to the protocol definition, and the BUF module 23 remains in the entering state.

[0037] Wherein, the explanation of the exit mode instruction: 1, the exit mode specifies no need to follow the data, which is used to make the BUF module 23 switch to the exit state, which can be completed after the bus is idle, usually after the BUF module 23 is switched to the exit state, the output end 22 of the control chip 24 outputs a fixed level, wherein the high or low of the fixed level is defined by the bus idle level; 2, if all LED units 2 in the LED lamp are in the BUF module 23 in the entry state, at this time the controller 1 implements a parallel protocol, and the input of the signal is completed, and each LED unit 2 independently receives the signal output by the controller 1; if the exit mode is given at this time, all LED units 2 are switched to the BUF module 23 in the exit state.

[0038] Wherein, when all LED units 2 in the LED lamp are in the BUF module 23 in the exit state, the input end 21 of the control chip 24 continuously listens to the designation, and the output end 22 outputs a fixed level; if the input end 21 detects the entry mode instruction, the BUF module 23 in the control chip 24 is switched to the entry state after receiving the data of the specified length; if the input end 21 detects the normal mode instruction, the subsequent data is processed according to the protocol definition; if the input end 21 detects the exit mode instruction, it is not necessary to process.

[0039] Embodiment 2

[0040] Based on embodiment 1, combined with Figures 3 to 9 As shown in the figure, the embodiment discloses an LED lamp, comprising a plurality of LED units 2, wherein adjacent two LED units 2 are connected through a VDD main line 3, a GND main line 4 and a signal line 5, the signal line 5 in any one LED unit 2 is disconnected and not conductive, and the two breakpoints of the signal line 5 in the LED unit 2 are connected with the input end 21 and the output end 22 of the control chip 24 respectively.

[0041] In one preferred embodiment, combined with Figures 3 to 5As shown, the LED unit 2 comprises a first support 26 for mounting a plurality of LED light chips 25, a second support 27 for mounting a control chip 24, any one of the first support 26 and the second support 27 is connected to the VDD main line 4, and the other is connected to the GND main line 5, and further comprises a first signal support 28 and a second signal support 29, the signal line 5 at the input end 21 is connected to the first signal support 28 and then connected to the input end 21 of the control chip 24, the signal line 5 at the output end 22 is connected to the second signal support 29 and then connected to the output end 22 of the control chip 24, and the first signal support 28 and the second signal support 29 are not conductive; In this embodiment, online positioning address can be realized on the basis of three lines, and the first signal support 28 and the second signal support 29 are made not conductive by using automatic process cutting, forming four-line action, realizing that the light string can be connected, and supporting repeated positioning address.

[0042] In combination with the above embodiment, in the specific structure, the first signal support 28 and the second signal support 29 are connected through the same signal line 5, and the disconnection and non-conduction between the first signal support 28 and the second signal support 29 are completed by cutting; preferably, a cutting gap 6 is arranged between the first signal support 28 and the second signal support 29, and the signal line 5 at the cutting gap 6 is disconnected and non-conductive by cutting; in this embodiment, the signal line 5 can carry the address line by cutting the signal line 5 of each LED unit 2, and the address burning of the serial protocol or the signal transmission in the parallel protocol can be realized by using the BUF module 23, so that the signal line 5 realizes the single-line dual-function action; at the same time, the use of the overall wire quantity is reduced, thereby reducing the manufacturing cost of the product.

[0043] In the remaining embodiments, in combination with the accompanying drawings Figure 6 and Figure 7 As shown, the first signal support 28 and the second signal support 29 between the adjacent two LED units 2 are connected through the same signal line 5; by using the staggered arrangement design of the signal line, in combination with embodiment 1, the double-function action between the LED units can be realized, and the address burning of the serial protocol of the controller 1 or the signal transmission in the parallel protocol can be realized.

[0044] In the remaining embodiments, in combination with the accompanying drawings Figure 8 and Figure 9 As shown, the first signal support 28 between the adjacent two LED units 2 is connected through the same signal line 5, and the second signal support 29 between the adjacent two LED units 2 is connected through the same signal line 5; by using the four-line arrangement structure, in combination with embodiment 1, the double-function action between the LED units can be realized, and the address burning of the serial protocol of the controller 1 or the signal transmission in the parallel protocol can be realized.

[0045] Embodiment 3

[0046] Based on any one of the above embodiments, this embodiment discloses a writing address method based on an LED lamp using a BUF module, including a controller, and the specific steps include:

[0047] S1, the LED lamp completes power-on, at this time, each LED unit in the LED lamp is in the entering state of the BUF module;

[0048] S2, the controller completes the instruction input of the exit state of the BUF module, so that each LED unit is in the exit state of the BUF module, at this time, the control chip enters the writing address mode;

[0049] S3, the input of address burning data is completed, and the LED units sequentially record the corresponding addresses from the beginning to the end until the complete input of address burning data or the completion of the recording of the corresponding addresses by all LED units.

[0050] Among them, the instructions of the controller are divided into entering mode instructions, exit mode instructions and regular mode instructions, when the address burning data contains entering mode instructions, the BUF module in the LED unit receiving the instructions becomes the entering state, and the subsequent address burning data is ignored.

[0051] Among them, when the control chip in the LED unit with the BUF module in the entering state receives a regular mode instruction, the BUF module remains in the entering state and processes the subsequent data according to the protocol definition; when the control chip in the LED unit with the BUF module in the entering state receives an exit mode instruction, the input of address burning data is restarted.

[0052] The above is only a preferred embodiment of the present application, and does not limit the application in any form. Any simple modification, equivalent change or modification made according to the technical principles of the present application to the above embodiments still belongs to the scope of the technical solutions of the present application.

Claims

1. An LED lamp using a BUF module, comprising a plurality of electrically connected LED units, the LED unit comprising a control chip and a plurality of LED light emitting chips electrically connected to the control chip, characterized in that: The control chip is provided with a BUF module at a signal input end and an output end, the control chip is used to supervise the BUF module, the control chip realizes entering control or exiting control of the BUF module through instruction receiving, when the BUF module is in an entering state, the control chip is in an instruction receiving state, and a plurality of LED units realize signal transmission through the conduction of the BUF module, the signal transmission is realized through a parallel protocol, and parallel control of the plurality of LED units is facilitated, when the BUF module is in an exiting state, the control chip enters an address writing mode, the control chip completes address burning of a corresponding LED unit through instruction receiving, after the burning is completed, light control of each LED unit in the LED lamp is realized through a serial protocol, when a plurality of conductive connected LED units are initially powered on, the BUF module is in the entering state, and the control chip is continuously in a state of listening to the input end, instructions are divided into entering mode instructions, exiting mode instructions and normal mode instructions, when all the LED units in the LED lamp are in the exiting state of the BUF module, the input end of the control chip continuously listens to instructions, and the output end outputs a fixed level, if the entering mode instructions are listened to by the input end, the BUF module in the control chip is switched to the entering state after receiving data of a specified length, if the normal mode instructions are listened to by the input end, subsequent data is processed according to the protocol definition, and if the exiting mode instructions are listened to by the input end, no processing is needed.

2. The LED lamp of claim 1, wherein: The signal line in any one LED unit is disconnected and not conductive, and the two breakpoints of the signal line in the LED unit are connected with the input end and the output end of the control chip respectively.

3. The LED lamp of claim 1, wherein: The LED unit comprises a first support and a second support, the first support is used to mount a plurality of LED light emitting chips, the second support is used to mount the control chip, any one of the first support and the second support is used to connect the VDD main line, and the other one is used to connect the GND main line, and the LED unit further comprises a first signal support and a second signal support, the signal line at the input end is connected with the first signal support and then connected with the input end of the control chip, the signal line at the output end is connected with the second signal support and then connected with the output end of the control chip, and the first signal support and the second signal support are not conductive.

4. The LED lamp of claim 3, wherein: The first signal support and the second signal support are connected through the same signal line, and a cutting gap is arranged between the first signal support and the second signal support, and the signal line at the cutting gap is disconnected and not conductive through cutting.

5. The LED lamp of claim 3, wherein: The first signal support and the second signal support between adjacent two LED units are connected through the same signal line.

6. The LED lamp of claim 3, wherein: The first signal support between adjacent two LED units is connected through the same signal line, and the second signal support between adjacent two LED units is connected through the same signal line.

7. A write address method based on an LED lamp with a BUF module, comprising a controller and an LED lamp with a BUF module according to any one of claims 1 to 6, characterized in that: S1, the LED lamp completes power-on, at this time, each LED unit in the LED lamp is in the entering state of the BUF module; S2, the controller completes the instruction input of the exit state of the BUF module, so that each LED unit is in the exit state of the BUF module, at this time, the control chip enters the write address mode; S3, the input of address programming data is completed, a plurality of LED units sequentially record the corresponding address from the beginning to the end until the complete input of address programming data or all LED units complete the recording of the corresponding address.

8. The method of Claim 7, wherein the LED lamp is based on a BUF module. The instructions of the controller are divided into entering mode instructions, exit mode instructions and normal mode instructions, when the address programming data contains the entering mode instructions, the BUF module of the LED unit receiving the instructions becomes the entering state, and the subsequent address programming data is ignored.

9. The method of Claim 8, wherein the LED lamp is based on a BUF module. If the control chip receiving the normal mode instructions in the LED unit with the BUF module in the entering state, the BUF module remains in the entering state and processes the subsequent data according to the protocol definition; if the control chip receiving the exit mode instructions in the LED unit with the BUF module in the entering state, the input of address programming data is restarted.

Images