Brands Guides About
LG

LG B1 Series Alexa Built-in 4K Smart OLED TV (2021)

LG's B1 Series brings self-lit OLED picture quality, Alexa built in, and smart TV convenience to your living room in a 2021 4K package.

Check availability
Affiliate Disclosure: Studio Supplies may earn a commission from qualifying purchases made through links on this page, at no additional cost to you. This helps support our editorial team.

Notice a mistake? Let Us Know

Overview

The LG B1 Series OLED TV brings the core benefits of LG's acclaimed OLED technology — self-emissive pixels, pixel-level dimming, and infinite contrast — into a more accessible tier of the 2021 lineup. Every pixel produces its own light and can shut off independently, which means true black levels and a contrast ratio that backlit LED panels simply cannot replicate. The result is a picture that looks stunning whether you're watching a dark, moody thriller or a brightly lit nature documentary, with colors that pop naturally without the blooming or halo effects common in edge-lit or direct-lit LED sets.

On the smart side, the B1 runs LG's webOS platform with built-in access to all major streaming services and includes Alexa voice control directly in the TV. The 4K resolution ensures sharp detail, and OLED's near-instantaneous pixel response time makes motion look smooth and natural — a benefit for sports fans and gamers alike. While the B1 uses LG's α7 Gen4 AI processor rather than the more powerful α9 found in the C1 and G1 series, it still handles upscaling, noise reduction, and scene-by-scene optimization effectively for the vast majority of viewing scenarios.

Specifications

Display Type
OLED (Self-Lit Pixel)
Resolution
4K (3840×2160)
Smart TV Platform
LG webOS
Voice Assistant
Alexa Built-In
Processor
α7 Gen4 AI Processor
Model Year
2021

Pros & Cons

👍 Pros

  • Self-lit OLED pixels deliver perfect blacks and exceptional contrast in any lighting
  • Built-in Alexa voice control adds hands-free convenience without an external device
  • LG webOS provides a smooth, well-supported smart TV experience with major streaming apps
  • Wide viewing angles inherent to OLED maintain picture quality from off-center seats

👎 Cons

  • Uses the α7 Gen4 processor instead of the higher-end α9 chip found in LG's pricier OLED models
  • OLED panels carry some risk of burn-in with prolonged static image display
  • Peak brightness is typically lower than high-end QLED or Mini LED alternatives
  • Limited product description means specific features like port count and audio specs should be verified before purchase

Frequently Asked Questions

OLED panels use self-lit pixels that can turn completely off, delivering perfect blacks, infinite contrast, and vibrant colors that backlit LED TVs cannot match.
Yes, Alexa is built directly into the TV, so you can use voice commands to control playback, smart home devices, and more without a separate speaker.
It runs LG's webOS platform, which provides access to popular streaming apps like Netflix, Disney+, Apple TV+, and others directly from the home screen.
The B1 supports HDMI 2.1 features, low input lag, and OLED's near-instant pixel response time, making it a strong choice for console and PC gaming — though it uses the α7 Gen4 processor rather than the higher-end α9 found in LG's C1 and G1 series.
OLED panels can be susceptible to image retention or burn-in if static images are displayed for extended periods. LG includes built-in screen-saver and pixel-refresher features on the B1 to help mitigate this risk during normal use.

Related Products