Two-way transmission and breakpoint continuous transmission LED device and display system

Abstract

The invention relates to a two-way transmission and breakpoint continuous transmission LED device and a display system. The two-way transmission and breakpoint continuous transmission LED device comprises an RGB LED chip set and a two-way driving IC chip, wherein the RGB LED chip set and the two-way driving IC chip are packaged on the front face of a substrate and are electrically connected; a VDD connecting end connected with a VDD pin of the bidirectional driving IC chip and a GND connecting end connected with a GND pin of the bidirectional driving IC chip are diagonally arranged on the back surface of the substrate; the bidirectional driving IC chip is provided with two first bidirectional ports and two second bidirectional ports opposite to the first bidirectional ports in function, and the back face of the substrate is further provided with two first connecting ends correspondingly connected with the two first bidirectional ports and two second connecting ends correspondingly connected with the two second bidirectional ports. Meanwhile, the invention discloses a display system formed by the LED device. According to the invention, bidirectional current transmission is supported, a breakpoint continuous transmission function is realized, and the application range is expanded.

Description

Technical Field

[0001] The invention relates to the field of LED display, in particular to an LED device and a display system capable of bidirectional transmission and breakpoint continuous transmission. Background Art

[0002] At present, traditional LED devices usually adopt unidirectional current drive and cannot realize bidirectional current transmission. In addition, the LED driver chips in the prior art are all provided with a data input port DI and a data output port DO. The LED driver chips are connected in series through the DI / DO ports, that is, the data output port DO of the previous chip is connected to the data input port DI of the next chip. However, with such a structure, after a bad point appears in an LED device, all the LED devices connected in series with it will not work, which will cause problems in the display of the entire display system, that is, the existing LED devices cannot realize breakpoint resumption; therefore, there is an urgent need for an LED device that can realize bidirectional current transmission and automatically resume transmission at breakpoints. Summary of the invention

[0003] In view of the existing deficiencies, the present invention provides an LED device and a display system capable of bidirectional transmission and breakpoint continuous transmission.

[0004] The technical solution adopted by the present invention to solve its technical problem is: a bidirectional transmission and breakpoint-resumeable LED device, comprising an electrically connected RGB LED chipset and a bidirectional driver IC chip that can be broken and resumed and packaged on the front side of a substrate, wherein a VDD connection terminal connected to a VDD pin of the bidirectional driver IC chip and a GND connection terminal connected to a GND pin of the bidirectional driver IC chip are diagonally arranged on the back side of the substrate; two first bidirectional ports and two second bidirectional ports with opposite functions to the first bidirectional ports are arranged on the bidirectional driver IC chip, and two first connection terminals corresponding to the two first bidirectional ports and two second connection terminals corresponding to the two second bidirectional ports are also arranged on the back side of the substrate.

[0005] Preferably, the bidirectional driving IC chip is provided with a port logic control unit and a switching unit controlled by a voltage detection unit.

[0006] Preferably, the RGB LED chipset comprises a red LED chip, a green LED chip and a blue LED chip, and the red LED chip, the green LED chip and the blue LED chip are connected in parallel on a bidirectional driving IC chip.

[0007] Preferably, the two first connection terminals and the VDD connection terminal are arranged on the same side of the back side of the substrate, and the two second connection terminals and the GND connection terminal are arranged on the same side of the back side of the substrate.

[0008] Preferably, the two first connection terminals on one LED device can form a serial communication link with the two second connection terminals on another LED device.

[0009] Preferably, the bidirectional driving IC chip is provided with a memory for storing address information of the bidirectional driving IC chip.

[0010] An LED display system comprises a plurality of LED devices as described in any one of the preceding items, wherein the GND connection ends of the plurality of LED devices are connected in parallel to a GND connection line, the VDD connection ends of the plurality of LED devices are connected in parallel to a VDD connection line, and the two first connection ends of the latter LED device and the second connection end of the former LED device between two adjacent LED devices form a serial communication link.

[0011] Preferably, the device further comprises a controller for controlling the plurality of LED devices, wherein the controller forms a serial communication link with the plurality of LED devices.

[0012] Preferably, it further comprises an energy storage module electrically connected to the controller, wherein the controller is provided with a power state detection unit for detecting the state of an external power supply and a switching switch for switching the external power supply to the energy storage module for power supply.

[0013] Preferably, a communication module is also provided in the controller.

[0014] The beneficial effects of the present invention are as follows: the present invention realizes the function of LED devices continuing transmission through another pair of bidirectional ports when one pair of bidirectional ports is broken by setting two pairs of bidirectional ports on the bidirectional driver IC chip, and the control of the bidirectional ports by the bidirectional driver IC chip meets the demand for bidirectional transmission of current, thereby expanding the scope of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of an LED display system according to an embodiment of the present invention;

[0016] Names and serial numbers of components in the figure: 1- substrate 10- VDD connection terminal 11- GND connection terminal 12- first connection terminal 13- second connection terminal 2- RGB LED chipset 3- bidirectional drive IC chip 4- GND connection line 5- VDD connection line 6- controller 60- power state detection unit 61- switching switch 62- communication module 7- energy storage module. DETAILED DESCRIPTION

[0017] In order to more clearly illustrate the purpose, technical solutions and advantages of the embodiments of the present invention, the present invention will be further described below in conjunction with the accompanying drawings and embodiments for a clear and complete description. Obviously, the embodiments described are partial embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work belong to the protection scope of the present invention.

[0018] Embodiments of the present invention Figure 1As shown in the figure, a bidirectional transmission and breakpoint-resumeable LED device includes an RGB LED chipset 2 electrically connected and packaged on the front of a substrate 1 and a bidirectional driver IC chip 3 capable of breakpoint-resumeable transmission. The substrate 1 is a glass substrate. The RGB LED chipset 2 includes a red LED chip, a green LED chip, and a blue LED chip. The red LED chip, the green LED chip, and the blue LED chip are connected in parallel to the bidirectional driver IC chip 3. The bidirectional driver IC chip 3 selects any existing bidirectional driver chip. At the same time, the bidirectional driver chip can also breakpoint-resumeable transmission. The bidirectional driver IC chip 3 is connected to the RGB LED chipset through a wire. The LED chipset 2 is electrically connected, and then placed on the substrate 1 after solidification, baking and wire bonding, and finally packaged on the substrate 1 with packaging glue to form a whole. A VDD connection terminal 10 connected to the VDD pin of the bidirectional driver IC chip 3 and a GND connection terminal 11 connected to the GND pin of the bidirectional driver IC chip 3 are diagonally arranged on the back of the substrate 1, that is, the VDD connection terminal 10 and the GND connection terminal 11 are arranged at both ends of the diagonal on the back of the substrate 1, which is convenient for the connection of the LED device on the power supply wire when forming a display screen; the bidirectional driver IC chip 3 is provided with two first bidirectional ports (not shown in the figure) and two second bidirectional ports (not shown in the figure) with opposite functions to the first bidirectional ports, that is, when the two first bidirectional ports are used as input ports, the two second bidirectional ports are used as output ports. Similarly, in When the two first bidirectional ports are used as output ports, the two second bidirectional ports are used as input ports. The bidirectional driving IC chip 3 is used to adjust them to be used as input ports or output ports, so as to adapt to the use requirements of different current flow directions; one first bidirectional port corresponds to one second bidirectional port to form a pair of input and output ports, and another first bidirectional port corresponds to another second bidirectional port to form another pair of input and output ports. At this time, any pair of input and output ports in the two pairs can be used as spare ports; the back of the substrate 1 is also provided with two first connection terminals 12 corresponding to the two first bidirectional ports and two second connection terminals 13 corresponding to the two second bidirectional ports. The two first connection terminals 12 are connected to the two first bidirectional ports one by one, and the two second connection terminals 13 are connected to the two second bidirectional ports one by one. When in use, when a first bidirectional port or a second bidirectional port has a breakpoint problem, the transmission can be continued through the other first bidirectional port or the other second bidirectional port. At this time, the two first connection terminals 12 and the VDD connection terminal 10 are arranged on the same side of the back side of the substrate 1, and the two second connection terminals 13 and the GND connection terminal 11 are arranged on the same side of the back side of the substrate 1, which facilitates the layout and connection between multiple devices when using the device to make a display screen and the connection with the power wire.Correspondingly, the two first connection terminals 12 on an LED device can form a serial communication link with the two second connection terminals 13 on another LED device. The serial communication link means that the two first connection terminals 12 on each LED device and the two second connection terminals 13 on the adjacent previous-level LED device are connected one-to-one, and the first LED device in the serial communication link is connected to the controller 6.

[0019] As a further improvement, a port logic control unit and a switching unit controlled by a voltage detection unit are provided in the bidirectional driving IC chip 3, that is, a first port logic control unit connected to the first bidirectional port is provided corresponding to the first bidirectional port, and a second port logic control unit connected to the second bidirectional port is provided corresponding to the second bidirectional port, and the command data passing through the port is transmitted through the port logic control unit. The switching unit is provided between the first bidirectional port and the first port logic control unit, or between the second bidirectional port and the second port logic control unit. The switching unit is controlled by the voltage detection unit, and the voltage detection unit is simultaneously connected to the first bidirectional port or the second bidirectional port corresponding thereto. When it is detected that the voltage value of the bidirectional port in use exceeds a preset threshold value, the voltage detection unit controls the switching unit to disconnect the connection between the port logic control unit and the port. Otherwise, the connection between the port logic control unit and the port is maintained.

[0020] As a further improvement, a memory for storing the address information of the bidirectional driver IC chip is provided in the bidirectional driver IC chip 3, so that the corresponding address information can be assigned to each LED device through the controller, and then the address information is stored in the memory. In the manufactured display screen, each LED device has a unique address, and the controller can control each LED device individually, and the display of other LED devices will not be affected by the damage of one LED device.

[0021] An LED display system, such as Figure 1 As shown in, it includes a plurality of LED devices as described in any of the above items, the GND connection terminals 11 of the plurality of LED devices are all connected in parallel to a GND connection line 4, the VDD connection terminals 10 of the plurality of LED devices are all connected in parallel to a VDD connection line 5, and the two first connection terminals 12 of the latter LED device and the second connection terminal 13 of the former LED device between two adjacent LED devices form a serial communication link, that is, the plurality of LED devices are sequentially connected in a row or a column between the GND connection line 4 and the VDD connection line 5. At this time, the LED display system also includes a controller 6 for controlling the plurality of LED devices, the controller 6 forms a serial communication link with the plurality of LED devices, and the controller 6 is arranged at the LED device side at the head end or the tail end.

[0022] Further improvements, such as Figure 1 As shown in the figure, it also includes an energy storage module 7 electrically connected to the controller 6. The energy storage module 7 uses a backup battery. When a problem occurs in the external power supply, the LED display system is powered by the backup battery. A power status detection unit 60 for detecting the external power status and a switching switch 61 for switching the external power supply to the energy storage module 7 are provided in the controller 6. The power status detection unit 60 is implemented by a voltage comparator or a microcontroller to monitor the voltage status of the external power supply in real time. The switching switch 61 is implemented by a relay or a solid-state switch. When the power status detection unit 60 detects a problem with the external power supply, it quickly switches to the energy storage module 7 for power supply.

[0023] Further improvements, such as Figure 1 As shown in , the controller 6 is further provided with a communication module 62, such as a wireless communication module such as Bluetooth, Wi-Fi or ZigBee, to communicate with external devices through the communication module 62, thereby realizing remote control and status monitoring.

[0024] Although the present invention has been described in detail above with general descriptions and specific embodiments, it is obvious to those skilled in the art that some modifications or improvements can be made on the basis of the present invention. Therefore, these modifications or improvements made on the basis of not departing from the spirit of the present invention all belong to the scope of protection claimed by the present invention.

Claims

1. A LED device with bidirectional transmission and breakpoint-resume transmission, characterized in that: The invention comprises an electrically connected RGB LED chipset and a bidirectional driving IC chip capable of breakpoint resumption, which are packaged on the front side of a substrate; a VDD connection terminal connected to a VDD pin of the bidirectional driving IC chip and a GND connection terminal connected to a GND pin of the bidirectional driving IC chip are diagonally arranged on the back side of the substrate; two first bidirectional ports and two second bidirectional ports with opposite functions to the first bidirectional ports are arranged on the bidirectional driving IC chip; two first connection terminals corresponding to the two first bidirectional ports and two second connection terminals corresponding to the two second bidirectional ports are also arranged on the back side of the substrate.

2. The LED device with bidirectional transmission and breakpoint-resume transmission according to claim 1, characterized in that: The bidirectional driving IC chip is provided with a port logic control unit and a switching unit controlled by a voltage detection unit.

3. The LED device with bidirectional transmission and breakpoint-resume transmission according to claim 1, characterized in that: The RGB LED chipset includes a red LED chip, a green LED chip and a blue LED chip, and the red LED chip, the green LED chip and the blue LED chip are connected in parallel on a bidirectional driving IC chip.

4. The LED device with bidirectional transmission and breakpoint-resume transmission according to claim 1, characterized in that: The two first connection terminals and the VDD connection terminal are arranged on the same side of the back side of the substrate, and the two second connection terminals and the GND connection terminal are arranged on the same side of the back side of the substrate.

5. The LED device with bidirectional transmission and breakpoint-resume transmission according to claim 1, characterized in that: The two first connection terminals on one LED device can form a serial communication link with the two second connection terminals on another LED device.

6. The LED device with bidirectional transmission and breakpoint-resume transmission according to claim 1, characterized in that: The bidirectional driving IC chip is provided with a memory for storing address information of the bidirectional driving IC chip.

7. An LED display system, characterized in that: It comprises a plurality of LED devices as described in any one of claims 1 to 6, wherein the GND connection ends of the plurality of LED devices are connected in parallel to a GND connection line, the VDD connection ends of the plurality of LED devices are connected in parallel to a VDD connection line, and the two first connection ends of the latter LED device and the second connection end of the former LED device between two adjacent LED devices form a serial communication link.

8. The LED display system according to claim 7, characterized in that: A controller for operating the plurality of LED devices is also included, wherein the controller forms a serial communication link with the plurality of LED devices.

9. The LED display system according to claim 8, characterized in that: It also includes an energy storage module electrically connected to the controller. The controller is provided with a power state detection unit for detecting the state of an external power supply and a switch for switching the external power supply to the energy storage module for power supply.

10. The LED display system according to claim 8, characterized in that: A communication module is also arranged in the controller.

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