The LG C4 OLED is a premium 4K smart TV featuring an updated 144Hz refresh rate, the Alpha 9 Gen7 AI processor, and LG’s Brightness Booster technology. Released in early 2024 as the successor to the popular C3, the C4 bridges the gap between mid-range and high-end OLEDs by offering professional-grade gaming specs and enhanced HDR performance. Its standout feature for 2026 remains its versatility, serving as both a top-tier gaming monitor and a cinematic centerpiece for living rooms. The TV supports Dolby Vision, Atmos, and all major VRR formats, ensuring compatibility with the latest consoles and PC hardware.
Alpha 9 Gen7 AI Processor
The LG C4 is powered by the Alpha 9 Gen7 AI processor, a significant leap from the Gen6 found in the C3. This silicon is responsible for “AI Super Upscaling,” which uses deep learning to sharpen lower-resolution content without creating artificial artifacts.
Beyond just pixels, the Gen7 chip handles “OLED Dynamic Tone Mapping Pro.” This technology divides the screen into 20,000 individual zones to optimize HDR brightness and contrast in real-time, resulting in a more three-dimensional image.
Unprecedented 144Hz Gaming Performance
One of the C4’s most defining upgrades is the increase in native refresh rate from 120Hz to 144Hz. This change specifically targets PC gamers, allowing for smoother motion that rivals high-end dedicated gaming monitors.
The TV is fully equipped with four HDMI 2.1 ports, all supporting the full 48Gbps bandwidth. This enables 4K gaming at high frame rates while simultaneously running NVIDIA G-Sync or AMD FreeSync Premium to eliminate screen tearing during intense gameplay.
Brightness Booster Technology
The LG C4 utilizes an “OLED evo” panel combined with a Light Boosting Algorithm to achieve higher peak brightness than previous C-series models. Benchmark tests show the C4 reaching over 1,000 nits in HDR peak highlights, a notable 25–30% increase over the C3.
While it lacks the Micro Lens Array (MLA) found in the flagship G4 or G5 series, the C4’s Brightness Booster ensures that whites are brilliant and colors remain saturated even in moderately lit rooms. This makes it a far more viable option for daytime viewing than older OLED generations.
Practical Information and Setup
If you are looking to purchase or configure an LG C4 in 2026, here is the essential logistical and technical data.
Available Sizes: 42, 48, 55, 65, 77, and 83 inches.
Mounting: VESA 300 x 200 (for most sizes); extremely thin profile at just 4.7cm at its thickest point.
Operating System: Ships with webOS 24; eligible for LG’s Re:New Program (5 years of OS updates).
Price Range: As of early 2026, the 65-inch model typically retails between $1,400 and $1,600, with significant discounts during holiday sales.
Connections: 4x HDMI 2.1, 3x USB 2.0, Ethernet, Optical Out, and RS-232C.
webOS 24 and Smart Features
The webOS 24 interface introduces “Quick Cards,” which group similar apps (like Gaming or Home Office) into easily accessible folders. This version also includes the “Re:New” guarantee, ensuring that C4 owners receive updates up to webOS 28.
Integrated AI features like “AI Concierge” learn your viewing habits to suggest content, while the “Home Hub” allows you to control Matter-compatible smart home devices directly from your remote. The TV also features “Always Ready” mode, transforming the screen into a digital clock or art gallery when not in use.
FAQs
Does the LG C4 support 144Hz on consoles?
No, current consoles like the PS5 and Xbox Series X are capped at 120Hz; the 144Hz feature is exclusive to PC gaming via compatible graphics cards.
What is the difference between the LG C4 and LG G4?
The G4 uses MLA (Micro Lens Array) technology to reach significantly higher brightness (up to 3,000 nits) and features a heatsink for better heat management, whereas the C4 is more affordable and uses a standard OLED evo panel.
Is the 42-inch LG C4 as bright as the 65-inch?
Historically, smaller OLEDs were dimmer, but LG has stated that the 42 and 48-inch C4 models are closer in brightness to their larger siblings than in any previous generation.
Does the LG C4 have a remote with a pointer?
Yes, it includes the Magic Remote, which allows you to navigate the UI by pointing at the screen like a computer mouse.
Is the stand adjustable for soundbars?
The standard pedestal stand is relatively low; many users find they need a soundbar riser or to wall-mount the TV to avoid blocking the bottom of the screen with a large soundbar.
What HDR formats are supported?
The C4 supports Dolby Vision, HDR10, and HLG, but like all LG TVs, it does not support HDR10+.
Can the LG C4 be used as a PC monitor?
Yes, especially in the 42-inch size, it is highly recommended as a monitor due to its 144Hz refresh rate, 0.1ms response time, and text clarity improvements.
How many years of updates will the LG C4 get?
Under the Re:New program, the C4 is guaranteed four major webOS upgrades over five years, taking it through 2028 or 2029.
Does it have an ATSC 3.0 tuner?
No, the LG C4 does not include a NextGen TV (ATSC 3.0) tuner; it uses a standard ATSC 1.0 tuner for over-the-air broadcasts.
What is the input lag on the LG C4?
In Game Optimizer mode, the input lag is exceptionally low, measuring roughly 9.2ms at 60Hz and significantly less at 120Hz or 144Hz.
Is burn-in still a risk on the C4?
While all OLEDs have a theoretical risk, the C4 includes OLED Care features like Pixel Cleaning and Screen Shift to mitigate permanent image retention significantly.
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