US 12,431,069 B2
Light emitting diode (LED) display driver utilizing ping pong line buffer to reduce hardware costs and latency
Shang-Kuan Tang, Milpitas, CA (US); Brandon Li, Milpitas, CA (US); and Eric Li, Milpitas, CA (US)
Assigned to SCT LTD., Grand Cayman (KY)
Filed by SCT LTD., Grand Cayman (KY)
Filed on Oct. 25, 2023, as Appl. No. 18/494,405.
Claims priority of provisional application 63/381,856, filed on Nov. 1, 2022.
Prior Publication US 2024/0153446 A1, May 9, 2024
Int. Cl. G09G 3/32 (2016.01)
CPC G09G 3/32 (2013.01) [G09G 2310/08 (2013.01); G09G 2320/0247 (2013.01); G09G 2360/18 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A method for operating a Light Emitting Diode (LED) display, comprising:
Step A: storing a Nth scan line data in at least one line buffer, wherein N is a natural number equal to or more than one;
Step B: displaying the Nth scan line data stored in the at least one line buffer, and simultaneously storing the Nth scan line data in at least one frame buffer, and storing a (N+1)th scan line data in the at least one line buffer;
Step C: displaying the (N+1)th scan line data stored in the at least one line buffer, and simultaneously storing the (N+1)th scan line data in the at least one frame buffer, and storing a (N+2)th scan line data in the at least one line buffer;
Step D: displaying the (N+2)th scan line data stored in the at least one line buffer, and simultaneously storing the (N+2)th scan line data in the at least one frame buffer;
Step E: repeating Step A to Step D until (N+M)th scan line data stored in the at least one line buffer is displayed, wherein M is a predetermined natural number more than N; and
Step G: displaying the scan line data stored in the at least one frame buffer from the Nth scan line data to the (N+M)th scan line data,
wherein the scan line data stored in the at least one frame buffer is sequentially displayed from the Nth scan line data to the (N+M)th scan line data in a same order as being previously displayed from the at least one line buffer.