Multi-channel LED sign module
An electronic display includes a controller transmitting display data from a data communication port. Modules are electrically connected to each other in a series connection. Each of a first module and a last module in the series connection receives the display data directly from the controller and transmits the display data to intermediate modules in the series connection. The intermediate modules pass the display data along the series connection in a first direction until the display data is received for a second time by the last module, and in a second direction until the display data is received for a second time by the first module. Each of the modules controls activation of a respective plurality of lighting elements based on the received display data.
1. A method of operating an electronic display, comprising the steps of providing a plurality of modules electrically connected to each other in a network such that each module is at least indirectly connected to each other one of the modules, and at least one of the modules is directly connected to at least four other ones of the modules; directly electrically connecting a first one of the modules to a controller; directly electrically connecting a second one of the modules to the controller; transmitting display data from the controller to each of the first module and the second module; transmitting the display data from the first module to every other one of the modules via the network; transmitting the display data from the second module to every other one of the modules via the network; using each of the modules to control activation of a respective plurality of lighting elements dependent upon the received display data; and using the first module to transmit directly to the controller an acknowledgement that the first module received the display data via the second module, wherein the acknowledgment comprises the display data.
2. A method of operating an electronic display, comprising the steps of: providing a plurality of modules electrically connected to each other in a network such that each module is at least indirectly connected to each other one of the modules, and at least one of the modules is directly connected to at least three other ones of the modules; directly electrically connecting a first one of the modules to a controller; directly electrically connecting a second one of the modules to the controller; transmitting display data from the controller to each of the first module and the second module; transmitting the display data from the first module to every other one of the modules via the network; transmitting the display data from the second module to every other one of the modules via the network; using each of the modules to control activation of a respective plurality of lighting elements dependent upon the received display data; transmitting diagnostic information from one of the modules to each other said module that the one module is directly connected to; and transmitting the diagnostic information from each of the other said modules that received the diagnostic information to the controller.
3. The method of claim 2 comprising the further step of transmitting an error signal from one of the modules to the controller if the one module does not receive the display data from each direction in which it is possible for the one module to receive the display data.
4. The method of claim 2 wherein the diagnostic information is transmitted via the network from each of the other said modules that received the diagnostic information to the controller.
5. The method of claim 4 wherein the diagnostic information comprises a status of the one module, a status of a part of the one module, a failure mode of the one module, an identity of another module that failed to transmit display data to the one module, and/or a direction from which the one module did not receive display data.
6. The method of claim 2 wherein the modules are arranged in a matrix including a plurality of substantially vertical columns of the modules and a plurality of substantially horizontal rows of the modules.
7. The method of claim 6 wherein each of the modules directly transmits the display data to each horizontally adjacent said module and to each vertically adjacent said module.