LG OLED77C6 Review: An Ambitious 77-inch OLED With Tandem Panel Technology

The LG OLED77C6 is the new 77-inch version of the C6 series, positioned in the middle of the Korean manufacturer's 2026 OLED range. Unlike the smaller diagonals of the C6 family (42, 48, 55, and 65 inches), this 77-inch model (like the 83-inch version) adopts a so-called "Tandem" OLED panel, composed of several superimposed organic layers, which allows it to reach a brightness considerably higher than the brand's "classic" OLED televisions. It can be compared to the G6 series TVs.

This difference in panel technology between the smaller diagonals and the 77-inch version is a really determining point, both for HDR rendering and for use in a bright living room during the day. In addition, LG combines this panel with its Alpha 11 third-generation processor, already present on the more expensive G6 series, in charge of upscaling, fine contrast management, noise reduction, and motion processing.

The idea here is therefore to offer a large-diagonal model that is not a simple extrapolation of the smaller versions, but rather an LG television optimised for immersive home cinema use, while retaining a C-series positioning supposedly more accessible than the G series.

On the market, the LG OLED77C6 finds itself faced with several very serious competitors. On the Samsung side, the S95F in 77 inches embodies the QD-OLED technology, particularly competitive in terms of colour volume and brightness, while the Panasonic Z95B still wants to be the reference in colour fidelity for a real home cinema atmosphere with all HDR formats supported.

Tested with a unit provided by LG.

The design of the LG OLED77C6 is in the exact continuity of what LG offers on its previous OLED ranges, with a very pared-down silhouette and an almost exclusive emphasis on the image surface. Seen from the front, the television comes down to a large panel surrounded by extremely thin edges (only 3 mm), which are quickly forgotten as soon as the content starts.

The frame adopts a dark, discreet finish and allows the image to remain at the centre of attention.

Physical Presence

The 77-inch format imposes a significant physical presence: the television occupies the visual field very widely and will inevitably dominate a classic TV unit, which makes it a natural choice for a spacious living room or a room dedicated to home cinema. Fortunately, LG has equipped it with a central foot to be assembled.

Profile and Thickness

In profile, you find the OLED signature with a very thin upper part of the panel (barely 4 mm), to which is added a thicker section in the lower part, which houses the electronics (only 5 cm thick), the power supply, and the audio system.

This additional thickness remains reasonable for a television of this size and does not hinder either placement on furniture or wall fixing, especially since VESA compatibility allows relatively simple mounting.

On this side, nothing changes. The connectivity of the LG OLED77C6 is strictly identical to that of previous models, which has nothing to envy other brands' models. They are organised here in a single block, which simplifies the connections especially if the TV is hung on the wall and there is everything you need to enjoy the latest Blu-ray reading technologies and video games from any console.

HDMI 2.1 Inputs

The television offers four HDMI inputs, all compatible with the HDMI 2.1 standard, which means the possibility of transmitting a 4K signal at high refresh rate, with VRR (Variable Refresh Rate) and ALLM (Auto Low Latency Mode) support. This complete approach avoids having to arbitrate between devices to plug into more or less evolved ports, which can be a problem on competing models that only offer two fully compatible inputs. The presence of an HDMI eARC port also guarantees a quality link with a soundbar or home cinema amplifier.

USB and Other Ports

In addition to the HDMI ports, the OLED77C6 has two USB ports for reading content from an external medium, as well as an Ethernet port for a more stable wired network connection, in addition to integrated Wi-Fi. There is also an optical audio output, still useful for some older audio systems, as well as an antenna input and a satellite input.

As an OLED television, the question of burn-in remains a legitimate concern for some users. LG has provided, as on its previous generations, a whole series of mechanisms intended to limit this risk: subtle image shifting to avoid fixed elements always staying in the same place, refreshing of pixels when the TV is in standby, and automatic brightness management of certain content.

The Tandem panel technology used on the 77-inch is also designed to offer better light efficiency, which allows producing more light for the same amount of energy, and therefore potentially reducing thermal stress on the sub-pixels.

The remote control supplied with the LG OLED77C6 is an evolution of the brand's famous Magic Remote. It is identical to the one delivered with the G5 series, which combines classic keys and a gyroscopic on-screen pointing system. It offers a format neither too small nor too large.

The remote also incorporates a microphone to control the TV's voice functions. Voice recognition progresses from generation to generation. Note that the controls are toggle-style for managing the volume and switching channels. Unfortunately, still no backlighting.

On the image plane, the LG 77C6 takes full advantage of the specific OLED panel used on this 77-inch diagonal, which is not the same as on the smaller versions of the series. The "Tandem" structure, with several superimposed emissive layers, allows reaching higher brightness levels while retaining the fundamental qualities of OLED: perfectly deep blacks, almost infinite contrast, and absence of halo around bright objects on a dark background.

Hyper Radiant Color and Brightness Booster

Note also the Hyper Radiant Color and Brightness Booster Ultra functions like the G6 and W6 series TVs.

In a room entirely plunged into darkness, night scenes gain in relief thanks to blacks that literally blend into the environment, while details in dark areas remain well preserved.

Colours and HDR

The colours appear rich and extremely natural without exaggeration, with excellent coverage of the colour spaces used for HDR formats, which gives a particularly seductive image on Dolby Vision and HDR10 content (recalling that LG TVs do not support the HDR10+ format).

Picture Modes

The television offers a palette of picture modes intended to cover different uses. The Cinema Home and Filmmaker modes prioritise fidelity. The Standard or Vivid modes accentuate the contrast and saturation more.

Upscaling

Lower-definition content, whether television channels or 1080p streams on streaming platforms, benefits from the Alpha 11 processor's processing, which improves perceived sharpness without generating too many artefacts.

In Use

In use, on recent 4K HDR films from streaming services or Ultra HD Blu-ray discs, the 77C6 offers a very immersive experience. Bright scenes, like snowy landscapes or sci-fi sequences full of light sources, benefit from the increased capacity of the panel to produce light peaks.

In addition to the subjective rendering which is of excellent quality, several measurements were carried out on this television.

SDR Performance

In SDR, an excellent colour fidelity was noted with a Delta E average of 1.14, well below the threshold of 3 below which the human eye can no longer distinguish between the displayed colour and the requested one. This is one of the best levels measured. Only the G5 (0.79, the record) and Panasonic Z95B (True Cinema mode at 1.31 and Filmmaker mode at 1.36) do better.

The average colour temperature is ideal with a value at 6,442 K (target 6,500 K). The gamma is also extremely well managed with an average of 2.42.

HDR Performance

The television supports HLG, HDR10, and Dolby Vision modes. It still skips the HDR10+ format. For HDR content, factory settings are perfect with a Delta E average of 0.51 in Filmmaker mode — equal to the best ever measured (G5 record).

Peak Brightness

For peak brightness, in dark conditions with a 10% test pattern, 2,110 cd/m² was recorded against 2,412 cd/m² for the 55-inch G5 and only 1,200 cd/m² for the 65-inch C5. The Samsung S95F offers a peak at 2,260 cd/m², and the Panasonic holds the record (for now) at 2,434 cd/m².

With a test pattern occupying 100% of the screen surface, a peak of 352 cd/m² was recorded. But the brightness with a 1%, 2%, and 5% pattern is much higher: more than 3,000 cd/m². This means the TV is capable of going far beyond on small parts of the image.

Colour Space Coverage

Concerning the coverage of colour spaces, the White-OLED technology used by LG Display is still beaten by Samsung Display's QD-OLED panels. The DCI-P3 domain is covered at 99.76% (99.9% for the G5 and 99.98% for the Samsung S95F) while the BT.2020 space, the most demanding, is covered at 81.29% (81.57% for the G5 and 88.50% for the S95F).

The LG 77C6 was clearly designed taking gamers' expectations into account. The four HDMI 2.1 inputs allow you to enjoy 4K modes at high refresh rate (up to 165 Hz, the highest on the market), as well as VRR.

Game Optimiser

The ALLM allows the television to automatically switch to low latency mode when a compatible console is detected. AMD FreeSync Premium Pro and NVIDIA G-Sync technologies are part of the package.

Gaming Dashboard

LG also offers an interface dedicated to gamers, grouped in a dashboard accessible on the fly, which displays in real time certain important parameters like the refresh rate, VRR activation, or the type of picture mode used.

Input Lag

On this television, an input lag of 12.9 ms was recorded with the Game Optimiser mode activated and 8.9 ms with the Booster option activated.

The audio section of the LG 77C6 relies on a configuration that is not extremely evolved compared to what is found on some televisions, even mid-range. LG has integrated here only two speakers, each developing 10 W of power and directed downwards.

There are some spatialisation treatments but they look pale and do not manage to transport. Dialogues are well brought forward, which is essential for comfortable listening to films and series, but the bass is absent and this limits the whole.

To get by, you can associate at minimum a soundbar. The TV is also compatible with Dolby Atmos Flex Connect technology, but only with LG products.

The LG 77C6 uses the latest version of the brand's connected platform, webOS, which has evolved a lot in recent years to become a real multimedia portal. The home screen presents a mosaic of content and applications, customisable according to user habits.

Navigation

Navigation is done both with the remote control's arrows and via the pointer, which greatly speeds up application selection or input in search/password fields. The interface remains generally fluid.

App Catalogue

The catalogue of available applications is particularly well stocked, covering all the major video and music streaming services.

Microsoft Copilot Integration

Microsoft's conversational assistant, Copilot, is part of the package and you can ask it anything. This function is available free of charge.

Profiles

The system is capable of recognising several different voices, thus adapting the personalised webOS interface to each member of the family — up to 10 profiles.

Measurements showed 55 W average consumption while watching a series in Filmmaker mode. For HDR content (Dolby Vision Filmmaker), the average was also 55 W. Standby consumption is 0.5 watts.

The LG 77C6 will be available in May 2026 at a recommended price of €3,499.