The LG OLED77C51LA is a 77-inch OLED evo smart TV with a 4K Ultra HD display (3840 x 2160). Each pixel produces its own black level for contrast, depth and detail. The display covers 100% color fidelity and 100% color volume, and a Brightness Booster light emission structure raises brightness.
The α9 AI Processor 4K Gen8 handles AI upscaling to 4K, AI picture and brightness control, and surround sound. HDR support includes Dolby Vision, HDR10 and HLG. The refresh rate is 120Hz native, with VRR up to 165Hz listed for the display and up to 144Hz for gaming. Gaming features include G-Sync and FreeSync compatibility, HGIG mode, ALLM, a Game Dashboard and Dolby Vision at 4K 120Hz.
The TV runs webOS 25 and comes with the AI Magic Remote, which has an AI button, voice commands and drag and drop features. It also supports Apple AirPlay 2, Apple Home, Google Home and Google Cast. Audio comes from a 2.2 channel, 40W downward-facing speaker system with Dolby Atmos and a virtual 11.1.2 up-mix.
- Screen size
- 77 inches
- Display type
- 4K OLED evo
- Resolution
- 3840 x 2160 (4K Ultra HD)
- Refresh rate
- 120Hz native (VRR 165Hz)
- Processor
- α9 AI Processor 4K Gen8
- HDR
- Dolby Vision, HDR10, HLG
- Picture features
- α9 AI Super Upscaling 4K, AI Genre Selection (SDR/HDR), AI Brightness Control, AI Picture Pro, FILMMAKER MODE, OLED Dynamic Tone Mapping Pro, Pixel Dimming, OLED Motion, QMS, 10 picture modes
- High frame rate
- 4K 120 fps (HDMI, RF, USB)
- Gaming
- G-Sync Compatible, FreeSync Compatible, HGIG mode, Game Optimizer (Game Dashboard), ALLM, VRR up to 144Hz, Dolby Vision for Gaming (4K 120Hz), response time under 0.1ms