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To try to better understand how long a TV should last, we're running 100 TVs through an accelerated longevity test for the next two years. We've just posted our 1-year video update with our latest findings on temporary image retention, burn-in, and more!

LG B4 OLED TV Review

Tested using Methodology v1.11
Reviewed May 07, 2024 at 02:53 pm
LG B4 OLED Picture
8.9
Mixed Usage
Value for price beaten by
: LG G3 OLED
8.4
TV Shows
Value for price beaten by
: LG G3 OLED
8.7
Sports
Value for price beaten by
: LG G3 OLED
9.4
Video Games
Value for price beaten by
: LG G3 OLED
9.0
HDR Movies
Value for price beaten by
: LG C3 OLED
9.1
HDR Gaming
Value for price beaten by
: Samsung S95B OLED
9.3
PC Monitor
Value for price beaten by
: Samsung S90C OLED

The LG B4 OLED is LG's entry-level TV in their 2024 OLED lineup. It sits below the LG C4 OLED and uses LG's α8 AI Processor 4K, which is designed to provide better image processing and can automatically optimize the TV's picture and sound settings. Only two of the four HDMI ports on last year's LG B3 OLED had HDMI 2.1 bandwidth, but this year's model has HDMI 2.1 bandwidth on all four HDMI ports. The TV adds 'Filmmaker Mode' as a picture setting for Dolby Vision, designed to preserve the content creator's intent without needing to change any settings. The TV uses the 2024 version of LG's webOS, and it has a 20W 2.0 channel speaker built-in that can be virtually up-mixed to 9.1.2 using the α8 AI Sound Pro feature. LG is releasing the B4 in a new, smaller 48-inch model, which in the past was only available in their C Series lineup and their discontinued A-Series lineup. It's available in four sizes total: 48-inch, 55-inch, 65-inch, and 77-inch.

Our Verdict

8.9 Mixed Usage

The LG B4 OLED is amazing for mixed usage. It has a nearly instantaneous response time for clear motion, which makes it an excellent choice for watching sports, using it as a PC monitor, or playing video games. Speaking of video games, the TV has HDMI 2.1 bandwidth on all four of its ports for up to 4k @ 120Hz with VRR, so it's fully compatible with modern gaming consoles. The TV is suitable for use in a bright room due to its fantastic reflection handling and very good SDR brightness, but it really shines in a dark room, with deep, inky blacks that are sure to impress. If you regularly watch TV with friends, the TV is a good option due to its wide viewing angle, but there is some color shift and a noticeable green tint the more you move off-center.

Pros
  • Near-infinite contrast ratio for perfect blacks with no blooming around bright highlights.
  • Very good SDR brightness and fantastic reflection handling makes it suitable for a bright room.
  • Nearly instantaneous response time for no noticeable blur behind fast motion.
  • Colors are vibrant and lifelike.
Cons
  • The screen has a bit of a green tint when viewed from an angle.
8.4 TV Shows

The LG B4 OLED is great for watching TV shows. The built-in webOS is loaded with streaming apps, so it's very easy to find your favorite shows. If you still watch older shows on DVD or are stuck watching low-quality streams, the TV has very good upscaling and does a good job smoothing out low-quality content. The TV has good SDR brightness and fantastic reflection handling, so it overcomes glare in a bright room. It's a good option for watching TV with friends due to its wide viewing angle, but there is a noticeable shift in color the more you move off-center, which leads to a green tint when viewed from an angle.

Pros
  • Very good SDR brightness and fantastic reflection handling makes it suitable for a bright room.
Cons
  • The screen has a bit of a green tint when viewed from an angle.
8.7 Sports

The LG B4 OLED is excellent for watching sports. The TV is suitable for watching the game with friends due to its wide viewing angle, but there's a noticeable green tint when the screen is viewed from an angle. It has excellent uniformity, so you won't be distracted by the dirty screen effect when watching sports with large areas of the same color, like hockey. The TV overcomes glare due to its very good SDR brightness and fantastic reflection handling, so it's suitable for a bright room. Finally, there's no noticeable blur behind quick-moving objects and players due to the TV's nearly instantaneous response time.

Pros
  • Excellent gray uniformity with no noticeable dirty screen effect.
  • Very good SDR brightness and fantastic reflection handling makes it suitable for a bright room.
  • Nearly instantaneous response time for no noticeable blur behind fast motion.
Cons
  • The screen has a bit of a green tint when viewed from an angle.
9.4 Video Games

The LG B4 is outstanding for playing video games. The TV has HDMI 2.1 bandwidth on all four of its ports and supports up to 4k @ 120Hz with VRR, so it's fully compatible with modern consoles. Enabling Game Optimizer doesn't impact image quality, so you don't have to trade picture quality for performance while gaming in SDR. There's no noticeable blur behind fast motion due to the TV's nearly instantaneous response time, and its exceptionally low input lag means there is no noticeable delay between your controller inputs and what happens on screen. The TV looks exceptional in a dark room due to its nearly infinite contrast ratio that delivers deep and inky blacks, but it's also suitable for a bright room since it overcomes glare thanks to its very good SDR brightness and fantastic reflection handling.

Pros
  • HDMI 2.1 bandwidth on all four ports.
  • Exceptionally low input lag for a very responsive experience.
  • Very good SDR brightness and fantastic reflection handling makes it suitable for a bright room.
  • Nearly instantaneous response time for no noticeable blur behind fast motion.
Cons
9.0 HDR Movies

The LG B4 OLED is fantastic for watching movies in a dark room. The TV has outstanding pre-calibration SDR accuracy, so it doesn't require calibration if you care about accurate colors. It removes 24p judder from any source, so movies are judder-free no matter how you watch them. The TV's remarkable contrast and incredible black uniformity deliver deep, inky blacks with no blooming when bright highlights are on screen, so it looks exceptional in a dark room. When it comes to HDR content, the TV's good HDR brightness delivers highlights that stand out, but it's not bright enough to properly display very bright highlights. Still, HDR content is impactful, and due to the TV's wide color gamut, colors are vibrant and lifelike.

Pros
  • Near-infinite contrast ratio for perfect blacks with no blooming around bright highlights.
  • Removes 24p judder from any source.
  • Colors are vibrant and lifelike.
  • Dolby Vision support.
  • DTS Audio support.
Cons
  • Noticeable stutter due to the TV's fast response time.
  • Aggressive ABL can be distracting with large areas of brightness.
9.1 HDR Gaming

The LG B4 OLED is fantastic for playing video games in HDR. It displays fast motion with no noticeable blur due to its nearly instantaneous response time, and its exceptionally low input lag delivers a responsive experience with no noticeable delay between your controller inputs and what happens on screen. Blacks are deep and inky in a dark room due to the TV's nearly infinite contrast ratio, and using Game Optimizer has no visible difference on HDR brightness, so you can enjoy an impactful HDR gaming experience without sacrificing performance. Finally, the TV is fully compatible with modern gaming consoles due to its HDMI 2.1 bandwidth on all four ports for up to 4k @ 120Hz and VRR support for nearly tear-free gaming.

Pros
  • Near-infinite contrast ratio for perfect blacks with no blooming around bright highlights.
  • HDMI 2.1 bandwidth on all four ports.
  • Exceptionally low input lag for a very responsive experience.
  • Nearly instantaneous response time for no noticeable blur behind fast motion.
  • Colors are vibrant and lifelike.
  • Dolby Vision support.
Cons
  • Aggressive ABL can be distracting with large areas of brightness.
9.3 PC Monitor

The LG B4 OLED is superb for use as a PC monitor. The TV has very good SDR brightness and fantastic reflection handling, so it overcomes glare in a bright room. Its nearly instantaneous response time means there's no noticeable blur behind quick cursor movements or when scrolling through pages, and its exceptionally low input lag delivers a very responsive desktop experience. You won't be distracted by the dirty screen effect when browsing the web due to its excellent uniformity, and you can sit close to the screen, with the sides remaining consistent with the center due to its wide viewing angle. The TV properly displays chroma 4:4:4 from a PC, which is essential for clear text. Unfortunately, due to its WRGB subpixel layout, there are still minor clarity issues with text, although most people won't be bothered by it.

Pros
  • HDMI 2.1 bandwidth on all four ports.
  • Exceptionally low input lag for a very responsive experience.
  • Excellent gray uniformity with no noticeable dirty screen effect.
  • Very good SDR brightness and fantastic reflection handling makes it suitable for a bright room.
  • Nearly instantaneous response time for no noticeable blur behind fast motion.
Cons
  • Text visibility issues due to the TV's WRGB subpixel layout.
  • 8.9 Mixed Usage
  • 8.4 TV Shows
  • 8.7 Sports
  • 9.4 Video Games
  • 9.0 HDR Movies
  • 9.1 HDR Gaming
  • 9.3 PC Monitor
  1. Updated May 07, 2024: Review published.
  2. Updated May 02, 2024: Early access published.
  3. Updated Apr 23, 2024: Our testers have started testing this product.
  4. Updated Apr 12, 2024: The product has arrived in our lab, and our testers will start evaluating it soon.
  5. Updated Apr 08, 2024: We've purchased the product and are waiting for it to arrive in our lab.

Differences Between Sizes And Variants

We tested the 65-inch LG B4 (OLED65B4PUA), and the results are also valid for the 48, 55, and 77-inch models. Note that the last three letters in the model number (PUA in this case) vary between retailers and individual regions, but there's no difference in performance. The variant that carries the suffix 'AUA' supports Wi-Fi 6E (the PUA variant has Wi-Fi 5).

Size US Model (Wi-Fi 5) Variant (Wi-Fi 6E)
48" OLED48B4PUA  OLED48B4AUA 
55" OLED55B4PUA OLED55B4AUA
65" OLED65B4PUA OLED65B4AUA
77" OLED77B4PUA OLED77B4AUA

Our unit was manufactured in March 2024, and you can see the label here.

Compared To Other TVs

The LG B4 OLED is an excellent entry-level OLED and has noticeable improvements over the LG B3 OLED. The biggest difference is its increased brightness in both SDR and HDR, which makes it more suitable for a brighter room, and it delivers a more impactful HDR experience than its predecessor. Unlike the LG C4 OLED, the B4 maintains almost all of its HDR brightness while using the Game Optimizer, which actually makes it a bit brighter overall than the C4 while using that mode. This makes it an excellent choice for gamers, especially since it has HDMI 2.1 bandwidth on all four of its ports and is available in a 48-inch model.

For more options, check out our recommendations for the best OLED TVs, the best gaming TVs, and the best TVs for watching movies.

LG C3 OLED
42" 48" 55" 65" 77" 83"

The LG B4 OLED and the LG C3 OLED are very similar overall. The C3 has better low-quality content smoothing, and its viewing angle is a bit better, with less color shift as you move off-center. The C3 also gets brighter overall, so it overcomes a bit more glare while watching SDR content in a bright room, and highlights stand out a bit more in HDR content. However, the C3 is noticeably dimmer while using the Game Optimizer, whereas the B4 maintains its brightness in that mode, which makes it a bit brighter overall while using Game Optimizer.

LG C4 OLED
42" 48" 55" 65" 77" 83"

The LG C4 OLED is better than the LG B4 OLED for the most part. The C4 has better reflection handling and slightly better SDR peak brightness, so it handles a bit more glare in a bright room, and it has better low-quality content smoothing. The C4 also has better overall HDR brightness, so highlights in HDR content stand out a bit more on it. However, the C4 is noticeably dimmer while using the Game Optimizer, whereas the B4 maintains its brightness, so they are very similar in brightness while using that mode.

LG B3 OLED
55" 65" 77"

The LG B4 OLED is better than the LG B3 OLED. The B4 has HDMI 2.1 bandwidth on all four ports, whereas the B3 only as it on two, so the B4 is more versatile if you have multiple high-bandwidth devices. The B4 also gets brighter overall, so highlights stand out more in HDR content, and it can overcome more glare in a bright room while watching SDR content. On top of that, the B4 has better HDR gradient handling for less banding.

Samsung S90C OLED
55" 65" 77" 83"

The Samsung S90C OLED is better than the LG B4 OLED. The S90C gets brighter in HDR, so highlights pop more on it. The S90C also displays more vibrant, lifelike, and bright colors overall due to its wider color gamut and better color volume, and its better viewing angle means that there is very little color shift when watching the TV from an angle. However, the B4 has better image processing, so low-resolution and low-quality content looks better on it, and it supports Dolby Vision and DTS audio formats.

Video

Test Results

perceptual testing image
Design
Design
Style
Curved No

Outside of the two feet instead of a central stand, the B4 has a very similar look as last year's LG B3 OLED. It's a thin TV with a silver frame and thin black bezels. It looks elegant and modern overall.

Design
Accelerated Longevity Test
Uniformity Pictures N/A
Design
Stand

Unlike the LG B3 OLED, all sizes of the B4 use two wide-set metal feet instead of a stand. The feet hold the TV very well, and there is minimal wobble when the TV is pushed on. The feet lift the TV about 3.2 inches above the table, so pretty much any soundbar will fit underneath without blocking the screen. The TV comes with two plastic clips that can be attached to the feet for cable management.

Footprint of the 65-inch stand: 41.6" x 9.25"

Design
Back
Wall Mount VESA 300x200

The LG B4 OLED has a dark gray metal back panel that feels almost like fabric, with a matching dark gray plastic central panel that houses the inputs. Some of the inputs face the side and are close enough to the edge of the TV that they are accessible when it's wall-mounted, but the back-facing inputs are nearly impossible to reach if you have the TV mounted to the wall. If you use a mount like LG's Slim Wall Mount that mounts the TV very close to the wall, the backports are unusable unless you use a 90-degree HDMI adapter. Since one of those back-facing HDMI ports is the eARC port, this really limits you if you want to wall-mount the TV with a soundbar plugged in.

Design
Borders
Borders 0.39" (1.0 cm)
Design
Thickness
Max Thickness 1.81" (4.6 cm)
8.5
Design
Build Quality

Although the B4's two feet aren't quite as premium as the stand included with LG's C Series lineup, they do the trick and still look good. There are no quality control issues with the TV, and it's built solidly.

Picture Quality
10
Picture Quality
Contrast
Contrast
Inf : 1
Native Contrast
Inf : 1

The TV 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.

10
Picture Quality
Blooming

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.

10
Picture Quality
Lighting Zone Transitions
Local Dimming
No
Backlight
No Backlight
Dimming Zones Count Of Tested TV
8,294,400

The LG B4 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.

9.5
Picture Quality
Contrast And Dark Details In Game Mode

There's no difference in dark scene behavior between the calibrated picture modes and when the TV is set in Game Optimizer.

7.7
Picture Quality
HDR Brightness
Hallway Lights (~1950 cd/m²)
647 cd/m²
Yellow Skyscraper (~700 cd/m²)
467 cd/m²
Landscape Pool (~300 cd/m²)
258 cd/m²
Peak 2% Window
685 cd/m²
Peak 10% Window
675 cd/m²
Peak 25% Window
509 cd/m²
Peak 50% Window
328 cd/m²
Peak 100% Window
147 cd/m²
Sustained 2% Window
678 cd/m²
Sustained 10% Window
666 cd/m²
Sustained 25% Window
501 cd/m²
Sustained 50% Window
326 cd/m²
Sustained 100% Window
144 cd/m²
Automatic Brightness Limiting (ABL)
0.094

The LG B4 has good HDR brightness. In combination with its remarkable contrast, it gets bright enough for highlights to stand out, but it's not bright enough to properly display very bright highlights. 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
  • Peak Brightness: High
  • Color Temperature: Warm 50

7.6
Picture Quality
HDR Brightness In Game Mode
Hallway Lights (~1950 cd/m²)
631 cd/m²
Yellow Skyscraper (~700 cd/m²)
407 cd/m²
Landscape Pool (~300 cd/m²)
278 cd/m²
Peak 2% Window
663 cd/m²
Peak 10% Window
665 cd/m²
Peak 25% Window
503 cd/m²
Peak 50% Window
326 cd/m²
Peak 100% Window
147 cd/m²
Sustained 2% Window
656 cd/m²
Sustained 10% Window
657 cd/m²
Sustained 25% Window
497 cd/m²
Sustained 50% Window
326 cd/m²
Sustained 100% Window
144 cd/m²
Automatic Brightness Limiting (ABL)
0.093

There's no noticeable difference with HDR brightness when the TV is set into Game Optimizer.

These measurements are after calibrating the HDR white point with the following settings:

  • HDR Picture Mode: Game Optimizer
  • OLED Pixel Brightness: 100
  • Contrast: 100
  • Dynamic Tone Mapping: HGiG
  • Peak Brightness: High
  • Color Temperature: Warm 50

9.8
Picture Quality
PQ EOTF Tracking
600 Nit Tracking Delta
0.0012
1000 Nit Tracking Delta
0.0011
4000 Nit Tracking Delta
0.0018

The LG B4 has exceptional PQ EOTF tracking. It follows the curve almost perfectly until it approaches the TV's maximum brightness. With content mastered at 600 or 1000 nits, there is a gradual roll-off near the TV's peak brightness to maintain some detail in bright highlights. With content mastered at 4000 nits, the roll-off happens much sooner to preserve detail in very bright highlights.

7.7
Picture Quality
SDR Brightness
Real Scene Peak Brightness
398 cd/m²
Peak 2% Window
425 cd/m²
Peak 10% Window
433 cd/m²
Peak 25% Window
426 cd/m²
Peak 50% Window
418 cd/m²
Peak 100% Window
244 cd/m²
Sustained 2% Window
419 cd/m²
Sustained 10% Window
429 cd/m²
Sustained 25% Window
423 cd/m²
Sustained 50% Window
416 cd/m²
Sustained 100% Window
242 cd/m²
Automatic Brightness Limiting (ABL)
0.037

The LG B4 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

8.7
Picture Quality
Color Gamut
Wide Color Gamut
Yes
DCI P3 xy
98.29%
DCI P3 uv
99.50%
Rec 2020 xy
72.27%
Rec 2020 uv
76.75%

The LG B4 has an excellent color gamut. It has outstanding coverage of the DCI-P3 color space used in most HDR content, but colors aren't mapped well in the DCI-P3 color space. Greens and cyans are the most off, but there are noticeable inaccuracies with all colors, and all colors are undersaturated.

The TV has good coverage of the wider Rec. 2020 space, which is increasing in popularity. Unfortunately, colors are inaccurate and undersaturated across the board in the Rec. 2020 color space.

7.9
Picture Quality
Color Volume
1,000 cd/m² DCI P3 Coverage ITP
66.9%
10,000 cd/m² Rec 2020 Coverage ITP
34.2%
White Luminance
719 cd/m²
Red Luminance
89 cd/m²
Green Luminance
306 cd/m²
Blue Luminance
38 cd/m²
Cyan Luminance
334 cd/m²
Magenta Luminance
115 cd/m²
Yellow Luminance
366 cd/m²

The LG B4 has good color volume. It displays dark, saturated colors very well, and its ability to display bright whites is excellent. It doesn't display other colors nearly as brightly as it does whites, but it's still enough to display impactful colors.

9.1
Picture Quality
Pre Calibration
White Balance dE
1.30
Color dE
1.20
Gamma
2.13
Color Temperature
6,550 K
Picture Mode
Expert (Dark Space)
Color Temp Setting
Warm 50
Gamma Setting
2.2

The LG B4 has outstanding pre-calibration accuracy. There is a bit of too much blue and red in some shades of gray, but it's so minor that even the most keen-eyed observers won't notice it. Color temperature is incredibly close to our target of 6500K and colors are so accurate that color enthusiasts will be pleased. Gamma is a bit off of our 2.2 target though, with bright and dark scenes being displayed too brightly.

9.5
Picture Quality
Post Calibration
White Balance dE
0.22
Color dE
1.03
Gamma
2.20
Color Temperature
6,495 K
White Balance Calibration
22 point
Color Calibration
Yes

After calibration, the TV is even more accurate. White balance, gamma, and color temperature are close to perfect, and colors are even slightly more accurate than they were before.

You can see our full calibration settings here.

8.8
Picture Quality
Gray Uniformity
50% Std. Dev.
0.738%
50% DSE
0.126%
5% Std. Dev.
0.470%
5% DSE
0.100%

The TV has excellent gray uniformity. There are some very faint vertical lines on the panel, but these aren't noticeable from a normal viewing distance.

10
Picture Quality
Black Uniformity
Std. Dev.
N/A
Native Std. Dev.
0.209%

Because OLEDs can turn off individual pixels, the TV has incredible black uniformity with no blooming or halo effect around bright objects.

8.9
Picture Quality
Viewing Angle
Color Washout
52°
Color Shift
29°
Brightness Loss
69°
Black Level Raise
70°
Gamma Shift
67°

The LG B4 has an excellent viewing angle. Unfortunately, there's a noticeable green tint when you look at the screen from an angle, and the green tint worsens the more you move off-center, although it's not as noticeable as it is on the LG C4 OLED.

9.1
Picture Quality
Reflections
Screen Finish
Glossy
Total Reflections
1.7%
Indirect Reflections
0.1%
Calculated Direct Reflections
1.6%

The TV has fantastic reflection handling. Its glossy screen finish does an outstanding job of reducing the intensity of direct reflections and significantly reduces the intensity of indirect reflections.

8.0
Picture Quality
HDR Native Gradient
100% Black to 50% Gray
6.0
50% Gray to 100% White
10
100% Black to 50% Red
8.0
50% Red to 100% Red
10
100% Black to 50% Green
6.0
50% Green to 100% Green
8.0
100% Black to 50% Blue
8.0
50% Blue to 100% Blue
8.0

The TV has very good HDR native gradient handling. There's some noticeable banding in dark grays and dark greens, but all other colors have minimal banding or no banding at all.

7.7
Picture Quality
Low-Quality Content Smoothing
Smoothing
7.5
Detail Preservation
8.0

The LG B4 has good low-quality content smoothing. It does a very good job of preserving details while doing a good job at removing artifacts, but there is still some noticeable macro-blocking in dark scenes. Setting 'Smooth Gradation' to 'High' behaves differently than last year's model and doesn't actually smooth out many artifacts at all. The picture you see is with 'Smooth Gradation' set to 'Medium'.

You can see the results with the other settings below.

8.0
Picture Quality
Upscaling: Sharpness Processing

The LG B4 OLED 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: High

Picture Quality
Pixels
Subpixel Layout
RWBG
Type OLED
Sub-Type
WOLED

The LG B4 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 for non-RGB subpixel layouts, but most users won't be bothered by this.

Motion
9.9
Motion
Response Time
80% Response Time
0.2 ms
100% Response Time
2.3 ms

The LG B4 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.

10
Motion
Flicker-Free
Flicker-Free
No
PWM Dimming Frequency
0 Hz

The LG B4 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.

Motion
Black Frame Insertion (BFI)
Optional BFI
Yes
Min Flicker For 60 fps
60 Hz
60Hz For 60 fps
Yes
120Hz For 120 fps
No
Min Flicker for 60 fps in Game Mode
60 Hz

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.

Motion
Motion Interpolation
Motion Interpolation (30 fps)
Yes
Motion Interpolation (60 fps)
Yes

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.

5.0
Motion
Stutter
Frame Hold Time @ 24 fps
39.4 ms
Frame Hold Time @ 60 fps
14.4 ms

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.

10
Motion
24p Judder
Judder-Free 24p
Yes
Judder-Free 24p via 60p
Yes
Judder-Free 24p via 60i
Yes
Judder-Free 24p via Native Apps
Yes

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.

9.4
Motion
Variable Refresh Rate
Native Refresh Rate
120 Hz
Variable Refresh Rate
Yes
HDMI Forum VRR
Yes
FreeSync
Yes
G-SYNC Compatible
Yes (NVIDIA Certified)
4k VRR Maximum
120 Hz
4k VRR Minimum
< 20 Hz
1080p VRR Maximum
120 Hz
1080p VRR Minimum
< 20 Hz
1440p VRR Maximum
120 Hz
1440p VRR Minimum
< 20 Hz
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.

Inputs
9.7
Inputs
Input Lag
1080p @ 60Hz
10.5 ms
1080p @ 60Hz Outside Game Mode
155.9 ms
1080p @ 120Hz
5.8 ms
1080p @ 144Hz
N/A
1440p @ 60Hz
10.8 ms
1440p @ 120Hz
5.7 ms
1440p @ 144Hz
N/A
4k @ 60Hz
10.6 ms
4k @ 60Hz + 10-Bit HDR
10.6 ms
4k @ 60Hz @ 4:4:4
10.6 ms
4k @ 60Hz Outside Game Mode
139.2 ms
4k @ 60Hz With Interpolation
130.6 ms
4k @ 120Hz
5.5 ms
4k @ 144Hz
N/A
8k @ 60Hz
N/A

The LG B4 OLED 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.

9.6
Inputs
Supported Resolutions
Resolution 4k
480p @ 59.94Hz (Widescreen)
Yes
720p @ 59.94Hz
Yes
1080p @ 60Hz @ 4:4:4
Yes
1080p @ 120Hz
Yes
1080p @ 144Hz
No
1440p @ 60Hz
Yes (forced resolution required)
1440p @ 120Hz
Yes
1440p @ 144Hz
No
4k @ 60Hz
Yes
4k @ 60Hz @ 4:4:4
Yes
4k @ 120Hz
Yes
4k @ 120Hz @ 4:4:4
Yes
4k @ 144Hz
No
8k @ 30Hz or 24Hz
No
8k @ 60Hz
No

The LG B4 supports all common formats, but it doesn't support 144Hz like the LG C4 OLED and the LG G4 OLED do. 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.

Inputs
PS5 Compatibility
Auto Low Latency Mode (ALLM)
Yes
4k @ 120Hz
Yes
1440p @ 120Hz
Yes
1080p @ 120Hz
Yes
HDR
Yes
VRR
Yes

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.

Inputs
Xbox Series X|S Compatibility
Auto Low Latency Mode (ALLM)
Yes
4k @ 120Hz
Yes
1440p @ 120Hz
Yes
1080p @ 120Hz
Yes
HDR
Yes
VRR
Yes

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.

Inputs
Inputs Specifications
HDR10
Yes
HDR10+
No
Dolby Vision
Yes
HLG
Yes
HDMI 2.0 Full Bandwidth
Yes (HDMI 1,2,3,4)
HDMI 2.1 Class Bandwidth
Yes (HDMI 1,2,3,4)
CEC Yes
HDCP 2.2 Yes (HDMI 1,2,3,4)
ATSC Tuner
1.0
USB 3.0
No
Variable Analog Audio Out No
Wi-Fi Support Yes (2.4 GHz, 5 GHz)

The LG B4 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.

Inputs
Input Photos
Inputs
Total Inputs
HDMI 4
USB 2
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
Inputs
Audio Passthrough
ARC/eARC Port
eARC
eARC: Dolby Atmos Over Dolby Digital Plus
Yes
eARC: Dolby Digital Plus 7.1
Yes
eARC: LPCM 7.1 Over Dolby MAT
Yes
eARC: Dolby TrueHD 7.1
Yes
eARC: DTS:X Over DTS-HD MA
Yes
eARC: DTS-HD Master Audio 7.1
Yes
eARC: LPCM Channels (Bitstream)
7.1
ARC: Dolby Digital 5.1
Yes
ARC: DTS 5.1
Yes
Optical: Dolby Digital 5.1
Yes
Optical: DTS 5.1
Yes

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.

Sound Quality
7.0
Sound Quality
Frequency Response
Low-Frequency Extension
84.76 Hz
Std. Dev. @ 70
3.82 dB
Std. Dev. @ 80
3.81 dB
Std. Dev. @ Max
5.99 dB
Max
90.1 dB SPL
Dynamic Range Compression
3.31 dB

The LG B4 has a decent frequency response. The TV speakers don't produce much bass, but the sound profile is well-balanced enough that the dialogue is clear. The speakers can get pretty loud, but there are compression and pumping artifacts at maximum volume.

6.7
Sound Quality
Distortion
Weighted THD @ 80
0.192
Weighted THD @ Max
0.570
IMD @ 80
3.53%
IMD @ Max
14.67%

The TV's distortion handling is okay. There's no audible distortion at moderate listening levels, but there's very audible distortion near and at max volume.

Smart Features
8.5
Smart Features
Interface
Smart OS webOS
Version 24
Ease of Use
Easy
Smoothness
Average
Time Taken to Select YouTube
2 s
Time Taken to Change Backlight
3 s
Advanced Options
Many

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.

Unfortunately, the TV has a bug that sometimes causes it to not properly switch out of the Game Optimizer setting, so you're locked out of settings that should be available in other picture modes. To fix this, you can turn the TV off/on or change the input label a few times. When you do this and switch to a different picture setting, everything works as it should.

Another bug causes the TV to flash on and off aggressively after enabling Game Optimizer. This lasts for a few seconds before the connection stabilizes.

0
Smart Features
Ad-Free
Ads
Yes
Opt-out
No
Suggested Content in Home
No
Opt-out of Suggested Content
No

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.

8.0
Smart Features
Apps and Features
App Selection
Great
App Smoothness
Average
Cast Capable
Yes
USB Drive Playback
Yes
USB Drive HDR Playback
Yes
HDR in Netflix
Yes
HDR in YouTube
Yes

The LG B4 OLED TV 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.

9.0
Smart Features
Remote
Size
Large
Voice Control
Many Features
CEC Menu Control
Yes
Other Smart Features
Yes
Remote App LG ThinQ

The LG B4 has the same Magic Remote as the LG B3 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.

Smart Features
TV Controls

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.

Smart Features
In The Box

  • Remote (with 2x AA batteries)
  • IR blaster
  • User manuals
  • Stickers
  • Cable management clips

Smart Features
Misc
Power Consumption 72 W
Power Consumption (Max) 214 W
Firmware 03.10.37