Design
Curved No
The LG C4 has a very sleek and modern design. It's very similar to last year's LG C3 OLED, but the back has a unique stone-like finish. The TV's bezels are incredibly thin, so you barely see them while watching.
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Design
Uniformity Pictures N/A
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LEARN ABOUT ACCELERATED LONGEVITY TEST
Design
The included stand on the 65-inch LG C4 is identical to the stand on last year's LG C3 OLED. The TV wobbles a bit when pushed on, but it quickly recovers, so this doesn't cause any issues. The stand lifts the screen about 2.7 inches above the table, so most soundbars fit underneath without blocking the screen. The 83-inch model uses a bigger stand, and the 42-inch model uses two wide-spread feet instead of a stand.
Footprint of the 65-inch stand: 18.5" x 9.0"
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Design
Wall Mount VESA 300x200
The back of the TV is made from plastic that is grainy to the touch and has a unique stone-like finish that really separates it from other TVs. Outside of that, the back is the same as the LG C3 OLED, with a large plastic central panel that houses the inputs. The inputs face the right which makes them easy to access if you have the TV on the stand, but they're still hard to reach when the TV is wall-mounted.
The back of the TV has clips that you can funnel cables through, and then they can be put through the clip on the stand to help with cable management.
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Design
Borders 0.24" (0.6 cm)
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Design
Max Thickness 1.77" (4.5 cm)
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9.0 Design
The build quality of this TV is incredible overall. There's a bit of flex near the VESA mounting points, but this is common and doesn't cause problems. The TV looks and feels premium.
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10 Picture Quality
Contrast
Native Contrast
The LG C4 has remarkable contrast and a nearly infinite contrast ratio. Due to OLED's self-lit pixels, the TV displays bright highlights next to perfect inky blacks, making it very impressive in a dark room.
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LEARN ABOUT CONTRAST
10 Picture Quality
Since OLEDs don't use local dimming and instead have individual pixels that can be lit up to their maximum brightness next to pixels that are turned off, there's no blooming when bright elements are surrounded by deep blacks.
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10 Picture Quality
Local Dimming
Backlight
Dimming Zones Count Of Tested TV
The LG C4 is an OLED and has no backlight, so its self-lit pixels give it the same performance as a TV with perfect local dimming and no zone transitions. We still film the zone transition video on the TV so you can see how it compares to a TV with local dimming.
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9.5 Picture Quality
There's no difference in dark scene behavior between the calibrated picture modes and when the TV is set in Game Optimizer.
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8.3 Picture Quality
Hallway Lights (~1950 cd/m²)
Yellow Skyscraper (~700 cd/m²)
Landscape Pool (~300 cd/m²)
Peak 2% Window
Peak 10% Window
Peak 25% Window
Peak 50% Window
Peak 100% Window
Sustained 2% Window
Sustained 10% Window
Sustained 25% Window
Sustained 50% Window
Sustained 100% Window
Automatic Brightness Limiting (ABL)
The LG C4 has great HDR brightness. It gets bright enough for most highlights to pop, but it's not bright enough to properly display very bright highlights. Still, it delivers an impactful HDR experience. Unfortunately, large bright scenes are significantly dimmer than smaller, specular highlights due to its aggressive Automatic Brightness Limiter (ABL).
These measurements are after calibrating the HDR white point with the following settings:
- HDR Picture Mode: Cinema
- OLED Pixel Brightness: 100
- Contrast: 100
- Auto Dynamic Contrast: Off
- Dynamic Tone Mapping: Off
- Expression Enhancer: Off
- Peak Brightness: High
Note that the 42-inch and 48-inch models don't have LG's Brightness Booster technology, so they don't get as bright as the bigger models do.
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LEARN ABOUT HDR BRIGHTNESS
7.5 Picture Quality
Hallway Lights (~1950 cd/m²)
Yellow Skyscraper (~700 cd/m²)
Landscape Pool (~300 cd/m²)
Peak 2% Window
Peak 10% Window
Peak 25% Window
Peak 50% Window
Peak 100% Window
Sustained 2% Window
Sustained 10% Window
Sustained 25% Window
Sustained 50% Window
Sustained 100% Window
Automatic Brightness Limiting (ABL)
The LG C4 is noticeably dimmer while in Game Optimizer. It's still bright enough to provide an impactful HDR gaming experience, but you notice the drop in brightness compared to the TV's other picture modes.
These measurements are after calibrating the HDR white point with the following settings:
- HDR Picture Mode: Game Optimizer
- OLED Pixel Brightness: 100
- Contrast: 100
- Auto Dynamic Contrast: Off
- Dynamic Tone Mapping: HGiG
- Expression Enhancer: Off
- Peak Brightness: High
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9.5 Picture Quality
600 Nit Tracking Delta
1000 Nit Tracking Delta
4000 Nit Tracking Delta
The LG C4 has fantastic PQ EOTF tracking. Some darker shadows and mid-tones are a bit brighter than intended, but the TV tracks the curve very closely. With content mastered at 600 or 1000 nits, there's a very small roll-off to preserve some detail in highlights. With content mastered at 4000 nits, there's a much more gradual roll-off to preserve detail in very bright highlights.
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LEARN ABOUT PQ EOTF TRACKING
7.8 Picture Quality
Real Scene Peak Brightness
Peak 2% Window
Peak 10% Window
Peak 25% Window
Peak 50% Window
Peak 100% Window
Sustained 2% Window
Sustained 10% Window
Sustained 25% Window
Sustained 50% Window
Sustained 100% Window
Automatic Brightness Limiting (ABL)
The LG C4 has very good SDR brightness. It gets bright enough to handle glare in a bright room, and the TV's Automatic Brightness Limiter isn't aggressive in SDR, so you don't have to deal with the screen dimming considerably when large areas of brightness are present.
These measurements are after calibration with the following settings:
- Picture Mode: Dark Space, night
- OLED Pixel Light: 100
- Peak Brightness: High
- Color Temperature: Warm 50
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LEARN ABOUT SDR BRIGHTNESS
8.6 Picture Quality
Wide Color Gamut
DCI P3 xy
DCI P3 uv
Rec 2020 xy
Rec 2020 uv
The LG C4 has an excellent color gamut. It has outstanding coverage of the DCI-P3 color space used in most HDR content. Colors are mapped well in the DCI-P3 color space, but all colors are undersaturated and off the mark to some degree. These results are with an aggressive 75% stimulus level. With a more realistic 50% stimulus, color accuracy is much better.
The TV has good coverage of the wider Rec. 2020 space, which is increasing in popularity. Colors are more off in the Rec. 2020 color space, with cyans and greens being the most off, and all colors are undersaturated.
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LEARN ABOUT COLOR GAMUT
8.1 Picture Quality
1,000 cd/m² DCI P3 Coverage ITP
10,000 cd/m² Rec 2020 Coverage ITP
White Luminance
Red Luminance
Green Luminance
Blue Luminance
Cyan Luminance
Magenta Luminance
Yellow Luminance
The LG C4 has very good color volume. It displays dark, saturated colors very well, and its ability to display bright whites is outstanding. It doesn't display other colors as brightly as it does whites, but it's still enough to display bright and vibrant colors.
With the TV set to Game Optimizer, there's a visible decrease in color luminance, and you can see the measurements below.
- White Luminance: 991 cd/m²
- Red Luminance: 98 cd/m²
- Green Luminance: 310 cd/m²
- Blue Luminance: 32 cd/m²
- Cyan Luminance: 340 cd/m²
- Magenta Luminance: 127 cd/m²
- Yellow Luminance: 409 cd/m²
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LEARN ABOUT COLOR VOLUME
9.0 Picture Quality
White Balance dE
Color dE
Gamma
Color Temperature
Picture Mode
Color Temp Setting
Gamma Setting
The LG C4 has fantastic pre-calibration accuracy. Its white balance is excellent, with just a bit too much red in all shades of gray. Gamma is very close to our target of 2.2, but bright scenes are a bit too bright. Color temperature is superb, but it's warmer than our target of 6500K, and color accuracy is outstanding, with only very minor inaccuracies in whites, lighter yellows, and lighter cyans.
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LEARN ABOUT PRE CALIBRATION
9.7 Picture Quality
White Balance dE
Color dE
Gamma
Color Temperature
White Balance Calibration
Color Calibration
The TV has exceptional accuracy after calibration to the D65 white point. The white balance and gamma are now essentially perfect. Color accuracy is even better than before, with no noticeable inaccuracies, and color temperature is incredibly close to our target of 6500K.
You can see our full calibration settings here.
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LEARN ABOUT POST CALIBRATION
8.8 Picture Quality
50% Std. Dev.
50% DSE
5% Std. Dev.
5% DSE
The LG C4 has excellent gray uniformity. If you look closely, there are some very faint vertical lines on the panel, but these aren't noticeable from a normal viewing distance.
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LEARN ABOUT GRAY UNIFORMITY
10 Picture Quality
Std. Dev.
Native Std. Dev.
Because OLEDs can turn off individual pixels, the TV has incredible black uniformity with no blooming or halo effect around bright objects.
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LEARN ABOUT BLACK UNIFORMITY
8.9 Picture Quality
Color Washout
Color Shift
Brightness Loss
Black Level Raise
Gamma Shift
Like all OLED TVs, the LG C4 has a fantastic wide viewing angle. This makes it a great choice for a wide seating arrangement, as the image doesn't wash out or degrade when viewed at an angle.
There's a noticeable green tint on the C4 we bought and tested. It's a widespread issue that impacts almost all LG OLED panels but varies widely from unit to unit. LG Electronics has confirmed to us that our unit is about as bad as it gets, and anything worse wouldn't pass LG's quality control checks. Although it varies between units, most people won't see this issue on their TV. This issue also isn't new or exclusive to the C4, as it's been an issue on LG TVs for a few years now.
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LEARN ABOUT VIEWING ANGLE
9.4 Picture Quality
Screen Finish
Total Reflections
Indirect Reflections
Calculated Direct Reflections
The TV has outstanding reflection handling. Its glossy screen finish significantly reduces the intensity of indirect reflections and does a fantastic job of reducing the intensity of direct reflections.
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LEARN ABOUT REFLECTIONS
7.8 Picture Quality
100% Black to 50% Gray 6.0
50% Gray to 100% White 6.0
100% Black to 50% Red 8.0
50% Red to 100% Red 10
100% Black to 50% Green 8.0
50% Green to 100% Green 6.0
100% Black to 50% Blue 10
50% Blue to 100% Blue 8.0
The TV has very good HDR native gradient handling. There's some noticeable banding in bright grays, dark grays, and bright greens, but all other colors have minimal banding or no banding at all.
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LEARN ABOUT HDR NATIVE GRADIENT
8.6 Picture Quality
Smoothing 9.0
Detail Preservation 7.5
The TV has excellent low-quality content smoothing. There's no noticeable macro-blocking in dark areas, and details are preserved well.
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8.0 Picture Quality
The LG C4 does a very good job at upscaling low-resolution content like DVDs or lower-resolution streams. Details are clear enough, but very fine details are hard to make out.
Sharpness processing was calibrated with no over-sharpening for low-resolution content, with the following settings:
- Sharpness: 16
- Super Resolution: Off
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LEARN ABOUT UPSCALING: SHARPNESS PROCESSING
Picture Quality
Subpixel Layout
Type OLED
Sub-Type
The LG C4 uses a WOLED panel with a WRGB pixel structure where all four pixels are never lit at the same time. Due to its subpixel layout, it has minor issues with displaying text on Windows since ClearType isn't well optimized to non-RGB subpixel layouts, but most users won't be bothered by this.
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9.9 Motion
80% Response Time
100% Response Time
The LG C4 has a nearly instantaneous response time, resulting in incredibly clear motion with almost no blur behind fast-moving objects. Due to the sample-and-hold nature of OLED technology, there's still some persistence blur when gaming at 60Hz, but it's not noticeable at higher refresh rates.
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LEARN ABOUT RESPONSE TIME
10 Motion
Flicker-Free
PWM Dimming Frequency
The LG C4 doesn't have a traditional backlight and doesn't use pulse-width modulation (PWM) to dim each pixel, but it's not completely flicker-free. There's a slight dip in brightness that corresponds to the TV's refresh rate. This differs from the PWM flicker on TVs with LED backlights and occurs on every OLED we've tested. It's not noticeable, and most people won't be bothered by this, but it can still bother people who are extra sensitive to flicker.
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LEARN ABOUT FLICKER-FREE
Motion
Optional BFI
Min Flicker For 60 fps
60Hz For 60 fps
120Hz For 120 fps
Min Flicker for 60 fps in Game Mode
The TV has an optional black frame insertion (BFI) feature that reduces the appearance of persistence blur caused by the TV's nearly instantaneous response time. It can only insert black frames at a 60Hz refresh rate.
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LEARN ABOUT BLACK FRAME INSERTION (BFI)
Motion
Motion Interpolation (30 fps)
Motion Interpolation (60 fps)
The TV has an optional motion interpolation feature to help improve the appearance of motion. It works well with slower scenes but struggles with fast-moving action, so there's noticeable haloing and artifacts present in busier scenes, especially if you use the settings too aggressively.
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LEARN ABOUT MOTION INTERPOLATION
5.0 Motion
Frame Hold Time @ 24 fps
Frame Hold Time @ 60 fps
Unfortunately, due to the TV's nearly instantaneous pixel response time, there's stutter with low frame rate content, which is most noticeable during slow panning shots.
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LEARN ABOUT STUTTER
10 Motion
Judder-Free 24p
Judder-Free 24p via 60p
Judder-Free 24p via 60i
Judder-Free 24p via Native Apps
The TV removes judder when watching 24p movies or TV shows when the Real Cinema setting is enabled, even from sources that can only send a 60Hz signal, like a cable box. Unfortunately, movies and TV shows aren't judder-free when BFI is enabled because the BFI feature only flickers at 60Hz.
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LEARN ABOUT 24P JUDDER
9.5 Motion
Native Refresh Rate
Variable Refresh Rate
HDMI Forum VRR
FreeSync
G-SYNC Compatible
4k VRR Maximum
4k VRR Minimum
1080p VRR Maximum
1080p VRR Minimum
1440p VRR Maximum
1440p VRR Minimum
VRR + Local Dimming No Local Dimming
The TV supports FreeSync and HDMI Forum VRR and is certified as G-SYNC compatible, ensuring a nearly tear-free gaming experience from any VRR-enabled source.
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LEARN ABOUT VARIABLE REFRESH RATE
9.7 Inputs
1080p @ 60Hz
1080p @ 60Hz Outside Game Mode
1080p @ 120Hz
1080p @ 144Hz
1440p @ 60Hz
1440p @ 120Hz
1440p @ 144Hz
4k @ 60Hz
4k @ 60Hz + 10-Bit HDR
4k @ 60Hz @ 4:4:4
4k @ 60Hz Outside Game Mode
4k @ 60Hz With Interpolation
4k @ 120Hz
4k @ 144Hz
8k @ 60Hz
The LG C4 has exceptionally low input lag when set to Game Optimizer with 'Prevent Input Delay' set to 'Boost,' resulting in a very responsive gaming experience with very little delay between the actions on your controller and what happens on screen. For chroma 4:4:4 to work properly, you must set the input label to 'PC,' or the '4:4:4 Passthrough' setting must be enabled.
If you're a retro gamer, you can see the input lag results in 4:3 @ 60Hz below.
- 640x480: 27.2 ms
- 800x600: 33.8 ms
- 1024x768: 26.8 ms
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LEARN ABOUT INPUT LAG
9.6 Inputs
Resolution 4k
480p @ 59.94Hz (Widescreen)
720p @ 59.94Hz
1080p @ 60Hz @ 4:4:4
1080p @ 120Hz
1080p @ 144Hz
1440p @ 60Hz
1440p @ 120Hz
1440p @ 144Hz
4k @ 60Hz
4k @ 60Hz @ 4:4:4
4k @ 120Hz
4k @ 120Hz @ 4:4:4
4k @ 144Hz
8k @ 30Hz or 24Hz
8k @ 60Hz
The LG C4 supports all common formats. It displays chroma 4:4:4 properly, which is important for clear text from a PC.
There are two settings you can use to passthrough proper chroma 4:4:4. The first is to change the input label to 'PC.' The second is to enable the '4:4:4 Passthrough' setting in the 'HDMI Settings' menu. Both of these options work the same and lock you out from using the 'Peak Brightness,' 'Noise Reduction,' 'MPEG Noise Reduction,' 'Smooth Gradation,' and 'Real Cinema' settings.
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LEARN ABOUT SUPPORTED RESOLUTIONS
Inputs
Auto Low Latency Mode (ALLM)
4k @ 120Hz
1440p @ 120Hz
1080p @ 120Hz
HDR
VRR
The TV is fully compatible with everything the PS5 offers, like 1440p @ 120Hz and 4k @ 120Hz, as well as HDMI Forum VRR. It also supports Auto Low Latency Mode, so you don't have to worry about switching to Game Optimizer to get the lowest input lag.
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Inputs
Auto Low Latency Mode (ALLM)
4k @ 120Hz
1440p @ 120Hz
1080p @ 120Hz
HDR
VRR
The TV is fully compatible with everything the Xbox Series X|S offers, including 1440p @ 120Hz, 4k @ 120Hz, HDMI Forum VRR, FreeSync Premium Pro, and Dolby Vision gaming. It also supports Auto Low Latency Mode, so you don't have to worry about switching to Game Optimizer to get the lowest input lag.
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Inputs
HDR10
HDR10+
Dolby Vision
HLG
HDMI 2.0 Full Bandwidth
HDMI 2.1 Class Bandwidth
CEC Yes
HDCP 2.2 Yes (HDMI 1,2,3,4)
ATSC Tuner
USB 3.0
Variable Analog Audio Out No
Wi-Fi Support Yes (2.4 GHz, 5 GHz)
The LG C4 supports the full 48Gbps bandwidth of HDMI 2.1 on all four HDMI ports. This allows you to take full advantage of multiple high-bandwidth devices, like if you own both current-gen consoles and a high-end gaming PC.
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Inputs
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Inputs
HDMI 4
USB 3
Digital Optical Audio Out 1
Analog Audio Out 3.5mm 0
Analog Audio Out RCA 0
Component In 0
Composite In 0
Tuner (Cable/Ant) 1
Ethernet 1
DisplayPort 0
IR In 0
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Inputs
ARC/eARC Port
eARC: Dolby Atmos Over Dolby Digital Plus
eARC: Dolby Digital Plus 7.1
eARC: LPCM 7.1 Over Dolby MAT
eARC: Dolby TrueHD 7.1
eARC: DTS:X Over DTS-HD MA
eARC: DTS-HD Master Audio 7.1
eARC: LPCM Channels (Bitstream)
ARC: Dolby Digital 5.1
ARC: DTS 5.1
Optical: Dolby Digital 5.1
Optical: DTS 5.1
The TV supports many audio formats, including DTS audio formats, which is great if you like to watch DVDs or Blu-rays, as they often use DTS for their main audio tracks.
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6.7 Sound Quality
Low-Frequency Extension
Std. Dev. @ 70
Std. Dev. @ 80
Std. Dev. @ Max
Max
Dynamic Range Compression
The LG C4 has an alright frequency response. The TV speakers produce a small amount of bass, but it's not enough to have much impact on the viewer. The sound profile is well-balanced enough that the dialogue is clear, but the TV doesn't get very loud, and there are compression and pumping artifacts at maximum volume.
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LEARN ABOUT FREQUENCY RESPONSE
7.7 Sound Quality
Weighted THD @ 80
Weighted THD @ Max
IMD @ 80
IMD @ Max
The TV's distortion handling is good. There's no audible distortion at moderate listening levels, but there's noticeable distortion at max volume.
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LEARN ABOUT DISTORTION
8.5 Smart Features
Smart OS webOS
Version 24
Ease of Use
Smoothness
Time Taken to Select YouTube
Time Taken to Change Backlight
Advanced Options
The TV runs the 2024 version of LG's proprietary smart interface, webOS. The interface is fast and easy to use, and it supports user profiles, so you can customize the home page for different users.
The TV has a bug that causes the occasional black screen when changing resolutions and refresh rates frequently in a short period. The only fix for this is to unplug and re-plug the TV, but this is unlikely to happen with real-world usage.
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0 Smart Features
Ads
Opt-out
Suggested Content in Home
Opt-out of Suggested Content
There are two settings in the 'Home Settings' menu, namely the 'Home Promotion' and 'Content Recommendation' settings. These settings remove the top banner ads and suggested content from the home screen. This gives your home screen a clean look, but there's no way to remove ads from the apps page.
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LEARN ABOUT AD-FREE
8.0 Smart Features
App Selection
App Smoothness
Cast Capable
USB Drive Playback
USB Drive HDR Playback
HDR in Netflix
HDR in YouTube
The LG C4 has a great selection of apps, so it's easy to find your favorite content. You can also cast content from your phone onto the TV or play videos from a USB stick.
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9.0 Smart Features
Size
Voice Control
CEC Menu Control
Other Smart Features
Remote App LG ThinQ
The LG C4 has the same Magic Remote as the LG C3 OLED. You can use the remote as a pointer or use the traditional buttons to control the TV. The TV also supports hands-free voice control through microphones on the unit itself. You can use your voice to change inputs, open apps, search for content, and ask for the weather and time.
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Smart Features
A single button is on the bottom of the TV in the middle. You can use it to turn the TV on or off, change inputs or channels, and control the volume.
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Smart Features
- Remote (with 2x AA batteries)
- IR blaster
- User manuals
- Stickers
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Smart Features
Power Consumption 78 W
Power Consumption (Max) 215 W
Firmware 03.10.31
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