Control system and control method for low-power-consumption LED lamp string

Abstract

The invention provides a low-power-consumption LED lamp string control system and method, the system comprises a controller and an LED lamp bead chip connected with the controller, the LED lamp bead chip further comprises an address code module, a data module and a driving module, and the address code module and the driving module are both electrically connected with the data module; the address code module is in a non-dormant state and is constantly compared with the control data sent by the controller, specifically, a lamp bead address in the received control data is compared with a lamp bead address stored in the address code module, and if the lamp bead address is matched with the lamp bead address, the control data is transmitted to the data module; the data module processes the received control data to obtain a control signal; and the driving module controls the working state of the LED lamp bead based on the control signal generated by the data module. The problem of high LED power consumption in the display process of the current LED lamp string and the problem of low refresh rate caused by data transmission delay are solved.

Description

Technical Field

[0001] The present invention and LED light string light source, more specifically, relate to a control system and a control method of a low-power LED light string. Background Art

[0002] With the development of optoelectronic technology and information technology, LED lights are widely used in various indoor and outdoor media due to their rich display of colors. LED lamp beads contain driving circuits that can store addresses inside the driving circuits. The controller addresses each LED lamp bead individually to achieve the on / off control or color control of the specified LED lamp bead, so that the entire LED glass screen can change according to the image specified by the controller, achieving the richness, ornamental and interesting display effect of the LED glass screen. In order for the LED light string based on data line parallel connection to achieve different brightness or color for each light point, it is necessary to pre-assign different addresses to each light point. The existing LED lamp bead chips, which are often used as parallel structures, are in a power-on state when there is no signal control. This undoubtedly increases the standby power consumption of the LED lamp bead chip. There is currently no effective solution to the problem of high LED power consumption in the prior art and the problem of low refresh rate caused by data transmission delay. Summary of the invention

[0003] The technical problem to be solved by the present invention is that, in view of the above-mentioned defects of the prior art, a control system and a control method for a low-power LED light string are provided, aiming to solve the problem of high LED power consumption in the current LED light string display process and the problem of low refresh rate caused by data transmission delay.

[0004] The present application provides a control system for a low-power LED light string, comprising a controller and an LED lamp bead chip connected to the controller, wherein the LED lamp bead chip further comprises an address code module, a data module and a drive module, wherein the address code module and the drive module are both electrically connected to the data module; The address code module is in a non-sleep state and is always compared with the control data sent by the controller. Specifically, the address of the lamp bead in the received control data is compared with the address of the lamp bead stored in the address code module. If the address of the lamp bead matches, the control data is transmitted to the data module; The data module processes the received control data to obtain a control signal; The driving module controls the working state of the LED lamp beads based on the control signal generated by the data module.

[0005] In one embodiment, the controller is used to send real-time control data to the LED lamp bead chip, and the control data includes the lamp bead address and the lamp bead state control data.

[0006] In one embodiment, if the lamp bead address is not matched successfully, the lamp bead corresponding to the LED lamp bead chip maintains the current state unchanged.

[0007] In one embodiment, the LED light string is composed of a plurality of LED light points, each of which includes an LED lamp bead chip and at least one LED lamp bead that generates light in response to a driving current of the LED lamp bead chip.

[0008] In one embodiment, when the LED lamp chip is in a dormant state, only the address code module is in a standby state in real time.

[0009] In one embodiment, the address code module stores the addresses of the lamp beads on the entire lamp string, which are pre-burned in the address code module.

[0010] In one embodiment, the lamp bead is an RGB three-color lamp bead with three channels of data, each channel occupies 16 bits, and the data structure of the lamp bead address occupies 48 data bits.

[0011] In one embodiment, the method of controlling the light string includes a synchronous light on / off control command, a designated address light on / off command, and a designated random code light on / off command, and the above commands all include data bits.

[0012] The present application also provides a control method for a low-power LED light string, which is applied to the above-mentioned LED light string control system, and the method comprises: when the installed LED light string light source is powered on, the controller sends a control signal to the address code module of the LED lamp bead chip; The address code module compares the lamp bead address in the received control data with the lamp bead address stored in the address code module; If the lamp bead addresses match, the control data is transmitted to the data module; The data module processes the received control data to obtain a control signal; The driving module controls the working state of the LED lamp bead based on the control signal generated by the data module. This application uses a normal non-sleep address module in the LED control chip to compare with the data sent by the controller at all times. When the address code matches, the data module will be awakened to receive 48 bits of data; thereby solving the problem of high power consumption caused by the LED lamp bead chip not lighting up the lamp when sending the code, and at the same time solving the problem of low refresh rate caused by data transmission delay. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the principle mechanism of the control system of the low-power LED light string according to the embodiment of the present invention.

[0014] Figure 2It is a schematic diagram of the principle structure of the LED lamp bead chip of the low-power LED lamp string according to an embodiment of the present invention.

[0015] Figure 3 It is a flow chart of a method for controlling a low-power LED light string according to an embodiment of the present invention. DETAILED DESCRIPTION

[0016] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0017] The present application embodiment discloses a LED light string control system based on parallel connection of data lines, referring to Figure 1-Figure 3 The system includes: a controller and an LED lamp chip, wherein the controller and the LED lamp chip are externally connected to a power supply VDD and a ground GND.

[0018] In a specific embodiment of the present application, the LED light string is connected to the controller via a parallel data line, and the controller is externally connected to a power supply. The parallel data line is a single line or a single group of differential data lines, and the parallel single line or single group of differential data lines connects the LED lamp bead chips of all LED lamp points to the controller. Specifically, when in use, the controller sends a control command frame or control data based on a single-line edge self-aligned coding protocol, and the LED lamp bead chips of each LED lamp point receive and decode the control command frame to control the driving module to generate a driving current and then drive the corresponding LED lamp bead to emit light.

[0019] In one embodiment of the present application, the LED lamp bead chip further includes an address code module, a data module and a driving module, and the address code module and the driving module are both electrically connected to the data module; the address code module is set to a non-sleep state; the address code module is used to receive the address code sent by the controller and identify the uniqueness of the matching address code and turn on the power of the data module and the driving module, the data module is used to receive the lamp bead status control data sent by the controller and process the control data to obtain a control signal, and the driving module is used to control the working state of the LED lamp bead according to the control signal received and processed by the data module.

[0020] The controller further includes an encoding module, a first address code module and a lamp bead state control module, and the encoding module is connected to the first address code module and the lamp bead state control module. Based on the LED light string being connected to the controller via a parallel data line, the present application connects each LED light point together via a parallel data line, so that the data received by each LED light point is the same, so that even if the LED light point on the entire LED light string is damaged, it will not affect the display of other LED light points.

[0021] In this embodiment, the controller is used to send real-time control data to the LED lamp bead chip, and the control data is the lamp bead address and lamp bead state control data. The LED light string is composed of a plurality of LED lamp points. The LED lamp point includes an LED lamp bead chip and at least one LED lamp bead that generates light in response to the driving current of the LED lamp bead chip.

[0022] LED lamps are generally composed of red (R), green (G), and blue (B) three-color lamp beads or red (R), green (G), blue (B) and white (W) four-color lamp beads. According to the principle of three primary colors, the superposition of the three primary colors of red (R), green (G), and blue (B) can obtain a variety of colors. The RGB three-color lamp beads or RGBW four-color lamp beads in the prior art are based on the above principle. In some application scenarios, each group of LED light points includes red, green, and blue three-color LED lamp beads and an LED lamp bead chip, or includes red, green, blue, and white four-color LED lamp beads and an LED lamp bead chip. All LED lamp beads are connected in parallel between the power supply end and the ground end of the power line through the corresponding LED lamp bead chip, and the signal receiving end of the LED lamp bead chip in each group is connected to the control line of the controller through a wire.

[0023] Each LED light point contains an LED lamp bead chip. The LED lamp bead chip described in this application needs to be burned into the address code before being assembled into an integral light string to facilitate the recognition of the control chip and the control of RGB color, brightness, pattern mode, etc. This application sets an address code module in the LED lamp bead chip. The address code module is in a non-sleep state and is always compared with the control data sent by the controller. The address code module stores the address of the lamp beads on the entire light string, which is burned in the address code module in advance. The address code module compares the address of the lamp beads in the received control data with the address of the lamp beads stored in the address code module. If the address of the lamp beads matches, the control data is transmitted to the data module. The data module processes the received control data to obtain a control signal. The driving module controls the working state of the LED lamp beads based on the control signal generated by the data module. The lamp beads on the light string will be lit or turned off or otherwise controlled; if the address of the lamp beads is not successfully matched, the lamp beads corresponding to the LED lamp bead chip remain in the current state unchanged.

[0024] Under normal circumstances, the entire IC is in a dormant state, and only the address code module is in a standby state in real time.

[0025] The data structure of the control signal of the present application is: Trst+first chip Adij+ 48 bits of data+second chip Adij+ 48 bits of data+...+Nth chip Adij+ 48 bits of data+ gain data+Trst.

[0026] The address code data of this application is named Adji, and the lamp beads are RGB three-color lamp beads with 3 channels. It should be pointed out that in the RGB three-channel data or RGBW four-channel data, each channel occupies 16 bits (16 bits) of control data. The RGB three-channel contains 48 bits (48 bits) of control data.

[0027] Exemplarily, the light string control methods include synchronous light on / off control commands, designated address light on / off commands, and designated random code light on / off commands, all of which contain data bits, which are RGB three-channel data or RGBW four-channel data.

[0028] In a further technical solution of this embodiment, the synchronous light on and off mode is to send a synchronous light on and off control command to each LED lamp bead of an LED light string, and each LED lamp bead of an LED light string realizes synchronous on and off. In this embodiment, the synchronous light on and off control command is composed of a synchronous light on and off command word and the data bit in sequence. Specifically, the synchronous light on and off command word is preferably 16 bits (16 bits), of which the lower 5 bits are used to adjust the gain of the LED, and the lower 5 bits of the code element correspond to 32 adjustable gains. It should be noted that the data bit of the gain data can be 15 bits. Depending on the application scenario and function, the data bit of the gain data can be 18 bits, 21 bits, or 24 bits, which is not limited here.

[0029] When the data bits are RGB three-channel data, the synchronous light on and off control command is a total of 64 bits (64 bits) In a further technical solution of this embodiment, the designated address light on / off mode is to send a designated address light on / off command to each LED lamp bead in a group of LED lamp beads, and the LED lamp beads at the designated address in a group of LED lamp beads are turned on and off. In this embodiment, the designated address light on / off command is composed of the designated address light on / off command word, the first configuration bit, the address bit and the data bit in sequence. In this embodiment, the designated address light on / off command word is preferably 8 bits (8 bits), wherein the lower three bits are used to adjust the gain of the LED, and the lower three bits correspond to 8 adjustable gains. In this embodiment, the first configuration bit and the address bit are both 8 bits (8 bits), and a maximum of 256 addresses are supported. The first configuration bit in this embodiment is the address enable bit, which corresponds one-to-one to the 8-bit address bit. Each lighting mode command in this embodiment contains precisely set command logic, which can accurately and efficiently control the color, brightness, and pattern of the LED, thereby achieving an ideal technical effect.

[0030] The present application also discloses a control method for a low-power LED light string, which is applied to the above-mentioned LED light string control system. The method comprises: S110, when the installed LED light string light source is powered on, the controller sends a control signal to the address code module of the LED lamp bead chip; S120, the address code module compares the lamp bead address in the received control data with the lamp bead address stored in the address code module; if the lamp bead address matches, the control data is transmitted to the data module; S130, the data module processes the received control data to obtain a control signal; S140, the driving module controls the working state of the LED lamp bead based on the control signal generated by the data module.

[0031] It should be noted that the above-mentioned control methods of low-power LED light strings can be applied one by one to implement the above-mentioned LED light string control systems, which will not be described in detail here.

[0032] In the prior art, as a LED chip with a parallel structure, when there is no signal control, the entire chip is in a power-on state, which undoubtedly increases the standby power consumption of the chip.

[0033] The LED lamp bead chip of the present application has an address code module that is normally not in sleep mode, and is constantly compared with the control data sent by the controller. When the address code of the lamp bead matches, the data module will be awakened to receive 48 bits of data; if the address code data does not match successfully, the lamp bead corresponding to the LED lamp bead chip will remain in the current state unchanged. This solves the problem of high power consumption caused by the LED chip not lighting up the lamp when sending codes, and also solves the problem of low refresh rate caused by data transmission delay. It is easy for those skilled in the art to understand that the above is only a preferred embodiment of the present invention, and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A control system for a low-power LED light string, comprising a controller and an LED lamp bead chip connected to the controller, characterized in that: The LED lamp bead chip further includes an address code module, a data module and a driving module, and the address code module and the driving module are both electrically connected to the data module; The address code module is in a non-sleep state and is always compared with the control data sent by the controller. Specifically, the address of the lamp bead in the received control data is compared with the address of the lamp bead stored in the address code module. If the address of the lamp bead matches, the control data is transmitted to the data module; The data module processes the received control data to obtain a control signal; The driving module controls the working state of the LED lamp beads based on the control signal generated by the data module.

2. The control system of the low power LED light string as claimed in claim 1, characterized in that: The controller is used to send real-time control data to the LED lamp bead chip, and the control data includes the lamp bead address and lamp bead state control data.

3. The control system of the low power LED light string as claimed in claim 1, characterized in that: If the lamp bead address is not matched successfully, the lamp bead corresponding to the LED lamp bead chip remains in the current state unchanged.

4. The control system of the low power LED light string as claimed in claim 3, characterized in that: The LED light string is composed of a plurality of LED light points, each of which includes an LED lamp bead chip and at least one LED lamp bead that generates light in response to a driving current of the LED lamp bead chip.

5. The control system of the low power LED light string as claimed in claim 1, characterized in that: When the LED lamp bead chip is in a dormant state, only the address code module is in a standby state in real time.

6. The control system of the low power LED light string as claimed in claim 1, characterized in that: The address code module stores the addresses of the lamp beads on the entire lamp string and is burned into the address code module in advance.

7. The control system of low power LED light string as claimed in claim 1, characterized in that: The lamp bead is an RGB three-color lamp bead with 3-channel data, each channel occupies 16 bits, and the data structure of the lamp bead address occupies 48 data bits.

8. The control system of the low power LED light string as claimed in claim 7, characterized in that: The method of controlling the light string includes synchronous light on / off control command, designated address light on / off command and designated random code light on / off command, and the above commands all contain data bits.

9. A method for controlling a low-power LED light string, applied to the LED light string control system according to any one of claims 1 to 8, characterized in that: The method comprises: When the installed LED light string light source is powered on, the controller sends a control signal to the address code module of the LED lamp bead chip; The address code module compares the lamp bead address in the received control data with the lamp bead address stored in the address code module; If the lamp bead addresses match, the control data is transmitted to the data module; The data module processes the received control data to obtain a control signal; The driving module controls the working state of the LED lamp beads based on the control signal generated by the data module.

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