LG C1 OLED TV review: The best high-end TV for the money - CNET

OLED TVs have the best picture quality available, and today there's more choices in OLED than ever. From the less-expensive LG A1 and Vizio H1 to the wallet-busting Sony A90J and LG G1, high-end shoppers who've decided on an OLED TV face another tough decision: which OLED TV, exactly? I haven't reviewed all of them, but from what I've seen so far, the best option for most buyers is the LG OLED C1. It combines that incredible image quality with the best features -- particularly for gamers -- the widest range of screen sizes and a price that's not too outrageous.

How it stacks up

Like

Better picture quality than any non-OLED TV
Superior contrast and off-angle image
Best-in-class gaming features
Sleek styling with ultrathin panel

Don't Like

I compared the C1 directly to its predecessor, the LG CX, as well as to a TCL 8K QLED TV with Mini-LED that costs about the same, and the C1 was my favorite. It and the CX were neck-and-neck for picture quality, but the C1 pulled away with its flexible gaming options. Meanwhile the Samsung Q90A QLED is brighter and in some ways superior, but overall the picture quality of the C1 is better. The C1 is also a lot more affordable than the LG G1, and image quality on those two 2021 OLEDs was basically the same. I haven't reviewed the Sony A80J yet, which currently costs a bit more than the C1, but I'd be surprised if it was significantly better.

In short, if you want the superiority of OLED image quality, the LG C1 is my go-to-pick for 2021.

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Series and size information: I performed a hands-on evaluation of the 65-inch OLED C1, but this review also applies to the other screen sizes in the series. All sizes have identical specs and according to the manufacturer should provide very similar picture quality.

LG OLED48C1PUB, 48-inch
LG OLED55C1PUB, 55-inch
LG OLED65C1PUB, 65-inch
LG OLED77C1PUB, 77-inch
LG OLED83C1PUA, 83-inch

Slim, sleek and superior: Up close with the LG C1 OLED TV

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Get to know the LG C1 series

The C1 has more sizes than LG's least-expensive OLED TV, the A1 series, as well as better image-quality features. The A1 lacks HDMI 2.1, has a less impressive processor, as well as fewer HDMI inputs (three instead of four) and a 60Hz refresh rate.
The C1 also has more sizes than the more-expensive G1 series, which offers that "Evo" panel and a slimmer, wall-mount-centric Gallery design. The C1 also lacks a far-field mic for hands-free voice and a Next-Gen TV tuner, both relatively minor extras included on the G1.
OLED display technology is fundamentally different from the LED LCD technology used in the vast majority of today's TVs, including Samsung and TCL's QLED models.
The best LCD TVs I've reviewed so far scored a 9 in image quality, while OLEDs TVs like the C1 have scored a 10. High-end LCDs are brighter than OLEDs (especially with HDR), but the picture quality on OLED TVs I've reviewed is superior overall.
All OLED TVs are more subject to both temporary and permanent image retention, aka burn-in, than LCD TVs. We at CNET don't consider burn-in a reason for most people to avoid buying an OLED TV, however. Check out our guide to OLED burn-in for more.

Slim, sleek and familiar

If you've seen any mainstream LG OLED TVs in the last couple of years, the C1's design will ring a bell. The watchword is "minimalist," with a slim border around the screen on all four sides and a tiny, discrete LG logo. Seen from the side, the top two-thirds of the TV is blade-thin, while the bottom widens to accommodate the guts, inputs and other connections.

The stand is basically the same as the CX from last year, running almost the whole width of the panel in the front and incorporating a very heavy base at the rear that kept my review sample admirably steady. One change is the color of the back: It's now a stark white, like some LG OLEDs of yesteryear.

LG revamped the remote a bit. It kept my favorite features, namely the scroll wheel and motion-tracking, while slimming it down slightly. The biggest difference is the shortcut keys at the bottom: four for streaming services and two more for the built-in voice assistants, Google Assistant and Amazon Alexa.

Both Google and Alexa can do all the usual assistant stuff, including control smart home devices, answer questions and respond via a voice coming out of the TV's speakers (yep, both voices). Basics like "What's the weather?" works as you'd expect, complete with onscreen feedback. The C1 also works with Apple's AirPlay 2 system, just like many other TVs, allowing my iPhone to share photos and video to the screen from the Photos app and mirror my Mac and phone screens.

LG's WebOS menu system got a facelift for 2021 -- and I'm not a fan. Gone is the small, unobtrusive overlay at the bottom of the screen that lets you keep tabs on what you're watching. Instead there's a full-screen homepage, similar to Roku, Fire TV and Google TV. But it has fewer apps and more, well, junk. The top two-thirds of the screen are devoted to the weather, setup tips, a search window and a Trending Now section with a random collection of TV shows and movies. Below that is an app row and, further down, sections devoted to inputs and particular streaming apps. In general it feels like a hodgepodge with too much going on -- most systems are simpler and easier to grasp.

Features boxes: Checked

Key features

Display technology	OLED
LED backlight	N/A
Resolution	4K
HDR compatible	HDR10 and Dolby Vision
Smart TV	Web OS
Remote	Motion

The C1 isn't missing anything I'd expect on a high-end TV. Aside from the Evo panel, the C1 has the same image-quality features as the step-up G1, starting with the new Gen 4 a9 processing chip that adds scene detection and upgraded object enhancement over last year's version. Both the G1 and C1 also have a 120Hz refresh rate. The entry-level A1 OLEDs, meanwhile, have a more basic a7 processor and 60Hz refresh rate.

Just like last year, LG's OLED TVs' picture settings include a Filmmaker Mode. As promised, it turns off the soap opera effect for film-based content (yay) but so do many other modes in the C1. While plenty accurate, Filmmaker Mode is also relatively dim for SDR (standard dynamic range), so I ended up using Cinema and ISF Bright for most critical viewing. New for 2021 is a Game Optimizer menu with its own set of picture modes; see below for details.

All of LG's recent OLED models (except the A1) include the latest version of the HDMI standard: 2.1. That means their HDMI ports can handle 4K at 120 frames per second and variable refresh rate (VRR, including Nvidia G-sync and AMD FreeSync), as well as enhanced audio return channel (eARC) and automatic low latency mode (auto game mode). In other words, they can take advantage of the latest graphics features available on PlayStation 5 and Xbox Series X and S as well as high-end graphics cards. In fact the C1 is rare among high-end TVs in that all four of its HDMI support 4K/120 -- great for hardcore gamers with multiple next-gen devices.

The selection of connections is otherwise top-notch, though it no longer supports analog component video. There's also a dedicated headphone or analog audio output and another for IR blasters, which could ease some installations.

Four HDMI inputs with HDMI 2.1, HDCP 2.2
Three USB 2.0 ports
Optical digital audio output
Analog audio 3.5mm headphone output
RF (antenna) input
RS-232 port (minijack, for service only)
Ethernet (LAN) port

Picture quality comparisons

The C1 is a superb performer, every bit as capable as the best TVs I've reviewed. I wasn't able to compare it directly to the G1 for this review, but according to my measurements as well as my comparisons of both panels to the CX from 2020, the C1 and G1 have nearly identical image quality. The G1's Evo panel, as I mentioned in that review, doesn't deliver a major brightness advantage over other LG OLEDs, including the C1. In their favor, both 2021 OLEDs are excellent and the best-performing TVs I've reviewed, a hair above the CX.

For this review I also compared the C1 to the best-performing LCD TV I had on-hand, the TCL 65R648, which costs about the same as the C1 and happens to have 8K resolution. In case you're wondering, I saw no sharpness or resolution advantage with the 8K TCL compared to the 4K OLEDs when watching HD or 4K material. The TCL uses Mini-LED and full-array local dimming but doesn't perform quite as well as the Samsung Q90A, showing more blooming issues for example.

I didn't have the Samsung Q90A on-hand to compare directly either, but it's still the best LCD-based TV I've reviewed. That said, based on my comparison with the G1, the Q90A would still fall short of the C1, which exhibited perfect black levels, excellent mixed-scene contrast and better off-angle viewing than any LCD I've tested.

Dim lighting: As expected, the C1 was excellent in a dark room, but no better than the CX when watching cinematic material -- in this case The Lord of the Rings: The Return of the King on standard 1080p Blu-ray. During the darker scenes when Frodo, Sam and Gollum travel toward Mordor, for example, the inky blackness of both OLED TVs surpassed the contrast of the TCL, which showed lighter, less-realistic shadows and letterbox bars and some brightness variation (blooming) -- standard on just about every non-OLED TV.

Shadow detail was also excellent on the C1, if again not any different from the CX. The shadowy stairs and crags of Cirith Ungol looked realistic, not too bright and yet well-detailed. Again the TCL trailed somewhat, with slightly more obscured shadows and a less-theatrical look.

Bright lighting: The C1 is plenty bright enough for just about any viewing environment, but as usual it's not nearly as bright as competing LCD-based models. Compared to other OLEDs it measured basically as bright as the G1, despite lacking the Neo panel, and slightly brighter than the CX, but the difference isn't huge and proved tough to discern in most program material.

Light output in nits

TV	Brightest (SDR)	Accurate color (SDR)	Brightest (HDR)	Accurate color (HDR)
Samsung QN65QN90A	1,622	1,283	2,596	1,597
Hisense 65U8G	1,619	1,612	2,288	2,288
Sony XR65X90J	951	815	945	847
LG OLED65C1	409	333	790	719
LG OLED65G1	377	334	769	763
LG OLED65CX	377	290	690	634

LG OLEDs of recent vintage have a setting called Peak Brightness that boosts the light output for SDR sources in Cinema and Expert modes, and it works very well. The idea is to increase brightness for daytime viewing environments while maintaining the superior color accuracy of those modes. As with most TVs, the brightest mode for HDR and SDR (Vivid on the C1) is horribly inaccurate. For the accurate color columns above on the C1, I used ISF Expert Bright (Peak Brightness: High) for SDR and Cinema mode for HDR. I recommend C1 owners do the same to get good color in bright rooms in particular, because the difference between Vivid and more-accurate modes is slight. Note that with SDR you'll need to disable the Auto Energy Saving setting (Support > Energy Saving > Energy Saving Step > Off) to get full brightness.

Like all OLED TVs the C1 gets quite a bit dimmer than LCDs when showing full-screen white -- a hockey game, for example -- but even in those situations it's hardly dim. The C1's screen preserved black levels and reduced reflections very well, but no better than the CX.

Color accuracy: No complaints here. According to measurements and my comparisons, the C1's color was excellent. During the Muster of Rohan, for example, the red and blue of the tents, the green of the grassy fields and the skin tones of King Theoden and Merry all looked natural and realistic. On the other hand all of the TVs were quite accurate, to the extent that it was difficult to tell the difference.

Video processing: LG goes to great lengths to tout the improvement of its processing every year, but watching various material in the best picture settings the CX and C1 looked largely identical to me.

Motion handling on the C1 is excellent and a touch better than the CX however. Under TruMotion, the new Cinematic Movement setting (the default for Cinema mode) served up 24-frame cadence with a very slight hint of smoothing, improving on last year's too-smooth Cinema Clear setting while preserving 600 lines of motion resolution. 24p purists who want no smoothing at all will opt for the Off position (the default for Filmmaker mode) and suffer the low motion resolution, while tweakers will appreciate the fine granularity of the User De-Judder mode to dial in the right amount of smoothness; anything four or lower introduced some judder to my eye, conveying a sense of film rather than soap opera effect. De-Blur settings of six or higher deliver the full 600 lines of motion resolution.

User also opens up the OLED Motion Pro menu with three levels of black frame insertion that further improve motion resolution, with 800 lines in Low and a full 1,200 in Med and High. This last option introduces flicker, unfortunately, and all three are a bit dimmer than Off, but if blur really bugs you then they're worth experimenting with. One improvement over last year is that engaging OLED Motion Pro no longer totally crushes shadow detail -- it's a bit worse but still OK. Still, I'd choose to leave it off and sacrifice some motion resolution for maximum light output and shadow detail.

Uniformity: Like all OLEDs I've tested the C1 was exemplary in this area, with no significant brightness or color variations across the screen and nearly perfect image quality from off-angle. In very dark, full-field test patterns the edges did appear slightly dimmer than the middle, but that effect was invisible in any real program material I watched.

Gaming: Like the G1, the C1's biggest upgrades over 2020 models cater to gamers, and together they help the C1 become my new favorite TV for gaming. The new Game Optimizer is the name of both a picture mode and a full menu system. The latter offers all-new tweaks including four game genre modes: Standard, FPS mode (said to boost shadow detail), RPG mode (to boost contrast) and RTS mode (said to enhance mid-grayscale areas). There are also sliders labeled Black Stabilizer (for adjusting dark areas) and White Stabilizer (for bright areas), as well as the OLED Motion Pro setting described above (LG says it's particularly useful for games) and the Reduce Blue light setting (said to be easier on the eyes).

The C1 supported all advanced video features from my Xbox Series X, as advertised, including 4K/120 and VRR. Since I reviewed the G1 in April, LG has added a new status screen that appears whenever you're in Game Optimizer mode and hit the settings button. Clad in aggressive purple, it displays current frame-rate, picture mode, status of VRR, low latency (to reduce input lag) and black stabilizer. It's a nice enhancement and an answer to Samsung's game bar (I actually like it better because it shows more info), and if you don't like it you can turn it off.

The genre modes behaved similar to what I saw on the G1 and playing my current game, Mass Effect 3 from the Legendary Edition, I preferred the look of Standard, which was a good balance of contrast and shadow visibility. FPS will probably cater well to gamers who want maximum shadow visibility, and the other settings allow you to dial it in to your heart's content. I really like having all these extra adjustment options in a dedicated menu, especially since the calibration screens built into many games often do an inadequate job -- having the ability to tweak particular scenes is great.

Buried within Game Optimizer is another setting labeled "Reduce input delay (input lag)" with two options, Standard and Boost. The former, which is the default for any game, serves up an excellent lag number similar to past LG OLED models as well as the G1: just 13.1ms for both 1080p and 4K HDR sources. Engaging Boost cuts lag even further, to just under 10ms for both. The catch is that Boost is only available for 60Hz sources, so you can't use it with 120Hz games or VRR. And no, I don't think many humans would notice the extra 3ms of lag.

HDR and 4K video: The C1 is a superb performer with HDR as well, and while it lacked the brightness of the TCL and other high-end LCDs, its overall image quality, contrast and pop were superior.

Comparing the three TVs using the Spears and Munsil 4K HDR benchmark, for example, the two LG OLEDs looked consistently better than the TCL in most scenes. The TCL was brighter, for example, in the clouds, snowfields and mountaintops, but in more mixed bright-and-dark scenes it appeared slightly washed out in comparison, which hurt its overall contrast. Meanwhile the C1 and CX looked vibrant and powerful, even with their slightly dimmer highlights, and shadows in particular, for example in the twilit forests and shaded rocks, looked more natural and realistic. As usual the OLEDs really pulled ahead in the difficult shots of objects, for example cacti, flowers and a honey dipper, against black backgrounds -- the black of the TCL was brighter with visible blooming near the objects, while the OLEDs' was basically perfect. Colors in flowers and bottles of dye also looked more vibrant on the OLEDs.

All of that said, the C1 and CX were almost impossible to tell apart with Spears. Spot measurements of the C1 revealed it was very slightly brighter in some highlights, like the hub of the Ferris wheel (4:52), but without my light meter I couldn't tell.

Switching back to LOTR:ROTK on 4K Blu-ray, I saw an even greater advantage for OLED. The LGs outclassed the TCL in darker theatrical scenes, for example when Sam challenges Shelob. Their letterbox bars remained inky and true and their shadows appropriately dark, while the TCL's dark areas were lighter, in particular with high-contrast shots like Sam brandishing the Phial of Galadriel at the spider (1:50:18). Given the TCL's significant brightness advantage I expected its rendition of the Phial to measure brighter in comparison, but a spot measurement showed the TCL, C1 and CX were actually very close (422, 396 and 368 nits, respectively), again too close to discern without a meter.

And stop me if you've heard this before, but I couldn't tell the difference between the CX and C1 when watching ROTK. Both were equally superb.

Picture settings, HDR notes and charts

CNET is no longer publishing advanced picture settings for any TVs we review. Instead, we'll give more general recommendations to get the best picture without listing the detailed white balance or color management system settings we may have used to calibrate the TV. As always, the settings provided are a guidepost, and if you want the most accurate picture you should get a professional calibration.

Before my calibration for this review the Cinema preset was the most accurate, excellent in terms of grayscale and gamma. Since I now target a 2.2 gamma for my reviews in dark rooms, it was closer than ISF Expert Dark or the new Filmmaker modes, which both target gamma 2.4/BT 1886. ISF Bright was basically identical to Cinema, but I reserved that for brighter rooms.

For my calibration I tweaked the two-point grayscale slightly, reduced light output to my target of 137 nits and increased brightness by two pips to help with shadow detail (while still keeping perfect black levels), but otherwise I left well enough alone. The grayscale and color were already so accurate on my LG-provided review sample that I didn't need to touch the multipoint system or the color management system.

SDR dark room settings

Picture menu

Select Mode: Cinema (User)
Aspect Ratio Settings: 16:9 (Just Scan: On)
Filmmaker Mode Auto Start: Off
Reduce Blue Light: Off

Brightness submenu

OLED Pixel Brightness: 48
Adjust Contrast: 85
Screen Brightness: 52
Auto Dynamic Contrast: Off
Peak Brightness: Off
Gamma (Adjust Brightness): 2.2
Black Level: Auto
Motion Eye Care: Off

Color submenu

Color Depth: 50
Tint: 0
Color Gamut: Auto Detect
Fine Tune menu:
Color Upgrade: Off (no other adjustments)
White Balance menu:
Color Temperature: Warm 50 (no other adjustments)

Clarity submenu

Adjust Sharpness: 0
Super Resolution: Off
Noise Reduction, MPEG Noise Reduction: Off [for low-quality sources, some users may prefer to enable noise reduction]
Smooth gradation: Off [for low-quality sources, some users may prefer to enable]
Cinema Screen: On [may be grayed out depending on source]
TruMotion: Cinematic Movement

SDR bright room setting [all default except for below]

Picture Mode Settings: ISF Bright Room
Brightness menu:
OLED light: 100
Peak Brightness: High

TV software/firmware version tested: 3.15.36

HDR notes: The two most-accurate modes, HDR Cinema and Filmmaker mode were basically identical, following the target electro-optical transfer function -- how the TV converts data to a specific brightness -- quite closely and showing better grayscale than Cinema Home, the next-most accurate. Game Optimizer is best for gaming, thanks to its processing but quite blue; for the best color accuracy for gaming you should adjust the color temperature control all the way toward red (Color > White Balance > Color temperature > Warm50).

Color checker was more accurate than on the CX from last year and as usual with OLED the C1 covered the P3 HDR gamut very well. The C1 measured basically as bright as the G1 and brighter than the CX or the B9 from 2019, but the C9 from 2019 actually measured brighter in its least-accurate and basically the same in its most-accurate settings. Once again the TV automatically detected and engaged the HDMI Ultra HD Deep Color setting designed for HDR sources.

Geek box

Test	Result	Score
Black luminance (0%)	0.00	Good
Peak white luminance (SDR)	409	Average
Avg. gamma (10-100%)	2.16	Good
Avg. grayscale error (10-100%)	0.72	Good
Dark gray error (30%)	1.14	Good
Bright gray error (80%)	0.52	Good
Avg. color checker error	0.90	Good
Avg. saturation sweeps error	0.81	Good
Avg. color error	0.94	Good
Red error	1.84	Good
Green error	0.60	Good
Blue error	0.97	Good
Cyan error	0.68	Good
Magenta error	0.99	Good
Yellow error	0.58	Good
1080p/24 Cadence (IAL)	Pass	Good
Motion resolution (max)	1200	Good
Motion resolution (dejudder off)	1000	Good
Input lag (Game mode)	13.10	Good

HDR10
Black luminance (0%)	0.00	Good
Peak white luminance (10% win)	790	Average
Gamut % UHDA/P3 (CIE 1976)	98.98	Good
ColorMatch HDR error	4.59	Average
Avg. color checker error	1.13	Good
Input lag (Game mode, 4K HDR)	13.13	Good