| ??? 02/15/12 17:19 Read: times |
#185988 - 'matrix' is the killer Responding to: ???'s previous message |
I'm doing some maintenance work on a LED matrix panel that shows scrolling text. The scroll rate in this particular case is hardcoded to the same value as the refresh rate (1 pixel scrolled per display refresh period).
My question is, is this scroll rate common? or if it isn't, which is the usual way to decouple refresh rate from scroll rate? are the LEDs driven individually or do you illuminate by colomn and row scan? if you do not have a separate (such as the 2221) driver for each individual LED you are locked to (multiples of) the scan rate. If you are, increase the scan rate and you will be able to scroll at the desired speed as a multiple. I abhor displays driven by X and Y, the possibilities are soooo limited. Erik |
| Topic | Author | Date |
| Arbitrary-rate scroll in LED matrix display | 01/01/70 00:00 | |
| 'matrix' is the killer | 01/01/70 00:00 | |
| Display is dynamic driven | 01/01/70 00:00 | |
| Artifact confirmed to be software bug | 01/01/70 00:00 | |
| anyhow, | 01/01/70 00:00 | |
| Impossible if dynamic | 01/01/70 00:00 | |
| Minimum refresh rate | 01/01/70 00:00 | |
| 120 Hz | 01/01/70 00:00 | |
Direction of view | 01/01/70 00:00 |