Display unit with an LED matrix
AssigneeDambach-Werke GmbH
InventorBernd Eschbach
Life of this patent
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Abstract
A display unit with an LED matrix, particularly for outdoors, with display points arranged in lines and columns, which can be triggered by a control device and which are monitored for display errors by a monitoring device. A simple design provides a dependable function because the monitoring device has a current monitoring device with a current sensor, by which a trigger current for each display point can be detected and assigned to the respective display point by the monitoring device.
Claims11
In a display unit with an LED matrix with display points arranged in lines and columns, which can be triggered by a control device and which are monitored for display errors by a monitoring device, the improvement comprising:
- monitoring device having a current monitoring device with a current sensor (S) detecting a trigger current for each said display point (L) and assigning the trigger current to a respective display point (AL) by means of the monitoring device, and a plurality of current signals of the current sensors (S) in a control device (ST) returned by an acknowledgment line (ME) evaluated with respect to an error of the display point (AL) on a basis of a first time information of a line triggering present in the control device (ST) together with a second time information of a column triggering.
In a display unit with an LED matrix with display points arranged in lines and columns, which can be triggered by a control device and which are monitored for display errors by a monitoring device, the improvement comprising:
- the monitoring device having a current monitoring device with a current sensor (S) detecting a trigger current for each said display point (L) and assigning the trigger current to a respective display point (AL) by means of the monitoring device;
- there being one said current sensor (S) for each said line (y) and each said column (x), and the columns (x) and the lines (y) corresponding to a plurality of coordinate points (x, y) of the display points (AL) to be activated being triggered cyclically in multiplex operation at a frequency wherein the LEDs are triggered above a flicker fission frequency of an eye;
- and
- a plurality of display modules, each said display module having a control device (ST) with an error memory (FSP) of the control device, each said display module being controllable, and a total display assembled from an array of displays of the individual display modules by means of the control device.
Dependencies are inferred from the claim text.