Channel-scan switchable LED driving
An LED display device includes an LED array and a driver system thereof. The LED display device is configured so that LEDs in the LED array can switch between receiving scan signals at their anodes or receiving scan signals at their cathodes.
1. An LED display device, comprising:
at least one display units, wherein each of the at least one display units further comprises an LED array of L×M×N LEDs driven by N cores of channel scan switching;
an anode side switching circuit for anode side channel scan switching with M×N current source analog inputs and M×N digital scan inputs, wherein the anode side switching circuit is switchably connected to M×N current sources and M×N scan lines;
a cathode side switching circuit for cathode side channel scan switching with M×N current sink analog inputs and M×N digital scan inputs, wherein the cathode side switching circuit is switchably connected to M×N current sinks and M×N scan lines; and
a controller having:
a first selection circuit connected to M×N current sources and M×N scan lines, wherein the first selection circuit is configured to select at least one current source from the M×N current sources and at least one scan line from the M×N scan lines in the anode side switching circuit; and
a second selection circuit connected to M×N current sinks and M×N scan lines, wherein the second selection circuit is configured to select at least one current sink from the M×N current sinks and at least one scan line from the M×N scan lines in the cathode side switching circuit.
2. The LED display device of claim 1 , wherein one of the at least two modes of the controller is a static anti-blooming scan mode.
3. The LED display device of claim 1 , wherein the other one of the at least two modes of the controller is a strobe motion blur removal mode.
4. The LED display device of claim 2 , wherein when the first selection circuit and the second selection circuit are both switched to the static anti-blooming scan mode, all anodes are driven by the scan control inputs.
5. The LED display device of claim 3 , wherein when the first selection circuit and the second selection circuit are both switched to the strobe motion blur removal mode, all anodes are driven by the current source control inputs.
6. The LED display device of claim 2 , wherein when the first selection circuit and the second selection circuit are both switched to the static anti-blooming scan mode, CoreX cathodes are connected to corresponding CoreX channel current sink signals interleavedly.
7. The LED display device of claim 3 , wherein when the first selection circuit and the second selection circuit are both switched to the strobe motion blur removal mode, CoreX cathodes are connected to corresponding CoreX scan signals interleavedly.
8. The LED display device of claim 2 , wherein when the first selection circuit and the second selection circuit are both switched to the static anti-blooming scan mode, all cathodes are driven by the current sink control inputs.
9. The LED display device of claim 3 , wherein when the first selection circuit and the second selection circuit are both switched to the strobe motion blur removal mode, all cathodes are driven by the scan control inputs.
10. The LED display device of claim 1 , wherein the LED display device common anode configuration.
11. The LED display device of claim 1 , wherein the LED display device common cathode configuration.
12. A method for controlling an LED display device switchable between at least two modes, comprising:
deploying at least one display units, wherein each of the at least one display units further comprises an LED array of L×M×N LEDs driven by N cores of channel scan switching;
deploying an anode side switching circuit for anode side channel scan switching with M×N current source analog inputs and M×N digital scan inputs by at least switchably connecting the anode side switching circuit with M×N current sources and M×N scan lines;
deploying a cathode side switching circuit for cathode side channel scan switching with M×N current sink analog inputs and M×N digital scan inputs by at least switchably connecting the cathode side switching circuit with M×N current sinks and M×N scan lines;
deploying a first selection circuit connected to M×N current sources and M×N scan lines by selecting at least one current source from the M×N current sources and at least one scan line from the M×N scan lines in the anode side switching circuit; and
deploying a second selection circuit connected to M×N current sinks and M×N scan lines by selecting at least one current sink from the M×N current sinks and at least one scan line from the M×N scan lines in the cathode side switching circuit.
13. The method for controlling the LED display device of claim 12 , further comprises configuring the LED display device in a common anode configuration.
14. The method for controlling the LED display device of claim 12 , further comprises configuring the LED display device in a common cathode configuration.
15. The method for controlling the LED display device of claim 12 , further comprises: driving all anodes with the scan control inputs when the first selection circuit and the second selection circuit are both switched to a static anti-blooming scan mode.
16. The method for controlling the LED display device of claim 12 , further comprises: driving all anodes with the current source control inputs when the first selection circuit and the second selection circuit are both switched to the strobe motion blur removal mode.
17. The method for controlling the LED display device of claim 12 , further comprises: connecting CoreX cathodes to corresponding CoreX channel current sink signals interleavedly when the first selection circuit and the second selection circuit are both switched to the static anti-blooming scan mode.
18. The method for controlling the LED display device of claim 12 , further comprises: connecting CoreX cathodes to corresponding CoreX scan signals interleavedly when the first selection circuit and the second selection circuit are both switched to the strobe motion blur removal mode.
19. The method for controlling the LED display device of claim 12 , further comprises: driving all cathodes with the current sink control inputs when the first selection circuit and the second selection circuit are both switched to the static anti-blooming scan mode.
20. The method for controlling the LED display device of claim 12 , further comprises: driving all cathodes with the scan control inputs when the first selection circuit and the second selection circuit are both switched to the strobe motion blur removal mode.