Both the new series will be available from Spring 2018.
As for the 5 Series, it will be replacing the S series of televisions which the company now has.
The 6-Series also features Wide Color with NBP Photon technology for even more realistic colors and performance closer to the limits of human vision.
The TCL Roku Soundbar will be the first of the firm's Alto lineup of audio products. Likewise, the 5-Series models eequipped with iPQ Engine also offers precise color replication and HDR Pro Gamma to significantly improve HDR performance in any setting.
"Chief among the announcements is the TCL Roku 6-Series TVs, which offer 4K resolution and HDR, as well as Contrast Control Zone Technology, which includes 96 zones on the smaller 55" model and 120 zones on the larger 65" model.
"The X6 is by far TCLs premier panel, with an outstanding 85" Quantum Dot LED panel, featuring a 4K Dolby Vision HDR display and incorporating a Dolby Atmos powered 360 surround system by Harman Kardon this may be an "All in One" home theatre.
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So if the user asks Alexa for directions, it will display a map on the augmented reality screen, showing them the way. Brilliant is a touchscreen that replaces your light switch and has Amazon's assistant Alexa built in.
Like its predecessor the 6-series comes with a voice-capable remote, and later in 2018 Roku will debut its own digital assistant to take full advantage of voice commands. The TCL Roku Smart Soundbar will make adding great sound to a TCL Roku TV a breeze and allow for consumers to use voice to play music even when the TV is turned off.
TCL ended 2017 as the #3 smart TV brand in the US with all of its smart TVs powered by the Roku OS.
It is the first device to launch from Roku's Whole Home Entertainment Licensing program, which sees the company integrating its Roku OS into products beyond just TVs and streaming devices.
The Chinese TV manufacturer had a successful year in 2017, releasing several excellent Roku TV models at competitive price points that put the company in the spotlight of a stage that is only getting more and more crowded. "The 5-Series has television sizes ranging from 43" to 65".
In 2018, TCL Roku TVs are slated to receive a range of new features delivered through a software update to the Roku OS. "By extending always-on voice and audio capabilities to the TV for more control and entertainment functionality, you'll enjoy a more immersive and convenient home theater", the company concluded.