For new TV's that launch right around the beginning of the year, you may be able to see the first reduction in price in the run up to the Super Bowl (first week of February). You'll typically find the best deals on TV's around the Super Bowl, as retailers discount TV's, especially older TVs.
In July for Amazon Prime Day, you may be able to find deep discounts on some TV (usually not the higher end models)
If the new TV you want doesn't go on sale during the Super Bowl, or during Amazon Prime Day, the next approximate time you can see a drop in prices is at the end of August and into Labor Day sales. You might also see a drop in prices around Halloween.
You'll then see the next biggest drop in prices on new OLED TV's during the Holiday season, around Black Friday and Cyber Monday.
See the latest OLED TV prices at amazon or at Walmart.com