LG BX OLED TV Review

Tested using Methodology v1.5
Reviewed Aug 14, 2020 at 08:56 am
LG BX OLED Picture
8.7
Mixed Usage
Value for price beaten by
: no price info
9.4
Movies
8.1
TV Shows
8.5
Sports
9.0
Video Games
8.7
HDR Movies
8.7
HDR Gaming
8.6
PC Monitor
Type OLED
Sub-Type
WRGB
Resolution 4k

The LG BX OLED is the entry-level TV in LG's 2020 OLED lineup and like most OLED TVs, it offers excellent overall performance. It has an infinite contrast ratio and perfect black uniformity, ideal for watching movies in dark rooms. Gamers should appreciate its FreeSync variable refresh rate (VRR) support and it's also G-SYNC compatible. It has a near-instant response time that results in clear motion, but that means lower-frame rate content appears to stutter. This TV has wide viewing angles, so it's a great choice for a wide seating arrangement. Also, even though it doesn't get bright enough to combat glare, it has outstanding reflection handling, so it performs well in most fairly-bright rooms. Sadly, like any OLED TV, it has the risk of permanent burn-in, but this should only be an issue with constant static elements, like if you use the TV as a PC monitor or if you only watch the news. On the upside, it's a really well-built TV with a sleek and modern design.

Our Verdict

8.7 Mixed Usage

The LG BX OLED is an excellent overall TV. With its OLED technology, it's able to individually turn off pixels, resulting in an infinite contrast ratio and perfect black uniformity, so blacks appear black when viewed in the dark. It's outstanding for gaming because it has a near-instant response time, VRR support, and a really low input lag. Sadly, it doesn't get very bright, so it's not ideal to use in extremely bright rooms. Lastly, it has wide viewing angles if you want to watch TV or sports with friends and family.

Pros
  • Infinite contrast ratio.
  • Wide viewing angles.
  • Outstanding reflection handling.
  • Near-instant response time.
  • VRR support.
Cons
  • Doesn't get very bright.
  • Risk of permanent burn-in.
  • Lower-frame rate content sutters.
9.4 Movies

The LG BX OLED is outstanding for watching movies in dark rooms. It's able to individually turn off pixels, producing an infinite contrast ratio and perfect black uniformity. It upscales lower-resolution content, such as from Blu-ray players, with no issues and it removes judder from any source. Sadly, lower-frame rate content appears to stutter because of its near-instant response time.

Pros
  • Infinite contrast ratio.
  • Perfect black uniformity.
  • Removes 24p judder from any source.
Cons
  • Lower-frame rate content sutters.
8.1 TV Shows

The LG BX OLED is great for watching TV shows. It's a good choice to use in fairly bright rooms because even though it doesn't get bright enough to combat glare, it has outstanding reflection handling. It also has wide viewing angles, so you can enjoy an accurate image even while walking around. Sadly, it has a risk of permanent burn-in if you constantly watch content with static elements like the news and you're always on the same channel.

Pros
  • Wide viewing angles.
  • Outstanding reflection handling.
Cons
  • Doesn't get very bright.
  • Risk of permanent burn-in.
8.5 Sports

Excellent for sports. The LG BX OLED has a near-instant response time, so fast-moving content looks smooth. It's ideal to use while watching the big game with a group of friends because it has wide viewing angles. It also performs fairly well in bright rooms because it has outstanding reflection handling, but sadly, it doesn't get very bright.

Pros
  • Wide viewing angles.
  • Outstanding reflection handling.
  • Near-instant response time.
Cons
  • Doesn't get very bright.
  • Risk of permanent burn-in.
9.0 Video Games

The LG BX OLED is outstanding for video games. It has a near-instant response time, resulting in smooth motion, and the input lag is really low. It has a 120Hz refresh rate and it supports VRR to reduce screen tearing. It's also ideal for dark-room gaming because it has an infinite contrast ratio and perfect black uniformity. Unfortunately, it doesn't get bright enough to combat glare in really bright rooms, but it has outstanding reflection handling.

Pros
  • Infinite contrast ratio.
  • Near-instant response time.
  • VRR support.
  • Really low input lag.
Cons
  • Risk of permanent burn-in.
8.7 HDR Movies

The LG BX OLED is excellent for HDR movies. It supports both HDR10 and Dolby Vision and it displays an excellent wide color gamut for HDR, but sadly, it doesn't get bright enough to truly bring out highlights. It's able to individually turn off pixels, resulting in an infinite contrast ratio and perfect black uniformity, which is ideal for watching movies in dark rooms.

Pros
  • Infinite contrast ratio.
  • Excellent wide color gamut for HDR content.
  • Perfect black uniformity.
Cons
  • Doesn't get very bright.
8.7 HDR Gaming

Excellent for HDR gaming, mainly due to the LG BX OLED's outstanding gaming performance. It has VRR support to reduce screen tearing and it has a high 120Hz refresh rate. Also, its response time is near-instant, resulting in smooth motion. HDR content looks good on this TV as it displays a really wide color gamut, but it doesn't get bright enough to bring out highlights in HDR.

Pros
  • Infinite contrast ratio.
  • Near-instant response time.
  • VRR support.
  • Excellent wide color gamut for HDR content.
Cons
  • Doesn't get very bright.
  • Risk of permanent burn-in.
8.6 PC Monitor

The LG BX OLED is an excellent choice to use as a PC monitor. It has a wide viewing angle, so the image remains accurate even if you sit up close. It has low input lag and it displays proper chroma 4:4:4, which is important for reading text. Sadly, it has the risk of permanent burn-in, which can be problematic with static elements such as a desktop interface. On the upside, it performs well in fairly-bright rooms because it has outstanding reflection handling.

Pros
  • Wide viewing angles.
  • Outstanding reflection handling.
  • Really low input lag.
Cons
  • Doesn't get very bright.
  • Risk of permanent burn-in.
  • 8.7 Mixed Usage
  • 9.4 Movies
  • 8.1 TV Shows
  • 8.5 Sports
  • 9.0 Video Games
  • 8.7 HDR Movies
  • 8.7 HDR Gaming
  • 8.6 PC Monitor
  1. Update 8/19/2020: Update to HDMI Forum VRR support.

Test Results

perceptual testing image
Market Context
Market Context
Market Context

The LG BX OLED is the entry-level TV in LG's 2020 4k OLED lineup in the United States. It sits below the LG CX OLED and it replaces the LG B9 OLED from 2019. There aren't many OLED TVs available, but its main competitor is the Sony A8H OLED and it has a few LED competitors like the Samsung Q80T QLED.

Design
9.5
Design
Style
Curved No

The LG BX has an outstanding style with a center-mounted stand, much like 2019's LG B9 OLED. It's also very similar to the LG CX OLED, with the only difference being that the BX's stand is smaller and it's made out of plastic. All in all, it's a great-looking modern TV.

Design
Stand

This TV has the same stand as the LG B9 OLED. It's a center-mounted plastic stand that holds the TV well, but it has more wobble than the wider, metal stand on the LG CX OLED.

Footprint of the 55" stand: 22.1" x 9.1"

Design
Back
Wall Mount VESA 300x200

The back of the LG BX is nearly identical to the LG CX OLED and LG B9 OLED. The top half that holds the panel is metal with a smooth finish, and the bottom half where the inputs are housed is made from solid plastic. There's a clip on the back for cable management.

Design
Borders
Borders 0.35" (0.9 cm)

The borders are thin and aren't distracting.

Design
Thickness
Max Thickness 1.89" (4.8 cm)

The LG BX is very thin and it won't stick out much if wall-mounted. It gets thicker with the stand attached, but it still doesn't take up a whole lot of space.

8.5
Design
Build Quality

The LG BX has an excellent build quality. The plastic stand isn't as sturdy as the metal stand on the LG CX OLED, but it still holds the TV well. The plastic at the bottom of the TV, near where the inputs are, flexes a bit and makes a clicking noise as if it's not connected to the panel properly, but this could be an issue with our unit only. Besides that, there aren't any obvious problems and it's a well-built TV.

Picture Quality
10
Picture Quality
Contrast
Native Contrast
Inf : 1
Contrast with local dimming
N/A

Like all OLED TVs, the LG BX has an infinite contrast ratio since it's able to turn off individual pixels, resulting in perfect blacks.

10
Picture Quality
Local Dimming
Local Dimming
No
Backlight
No Backlight

This TV doesn't have a backlight, so it doesn't have a local dimming feature. It can dim pixels individually and subtitles are displayed perfectly, with no visible blooming.

6.5
Picture Quality
SDR Peak Brightness
SDR Real Scene Peak Brightness
285 cd/m²
SDR Peak 2% Window
336 cd/m²
SDR Peak 10% Window
401 cd/m²
SDR Peak 25% Window
363 cd/m²
SDR Peak 50% Window
291 cd/m²
SDR Peak 100% Window
138 cd/m²
SDR Sustained 2% Window
320 cd/m²
SDR Sustained 10% Window
380 cd/m²
SDR Sustained 25% Window
343 cd/m²
SDR Sustained 50% Window
276 cd/m²
SDR Sustained 100% Window
133 cd/m²
SDR ABL
0.068

The LG BX has just okay peak brightness. It's significantly less bright than the LG B9 OLED and doesn't get bright enough to combat glare in most rooms. It has an aggressive 'Automatic Brightness Limiter' (ABL) that dims the screen when large areas are bright, as seen in the dip in brightness in the 100% sustained window test.

These measurements were taken post-calibration in the 'Expert (Dark Room)' Picture Mode with Peak Brightness on 'High' and OLED Light on 'Max'. Originally, we had to run a Pixel Refresher because the screen seemed too dim compared to the LG B9 OLED, but the screen didn't get much brighter after the refresh. Before completing the Pixel Refresher, most scenes were between 334 to 394 cd/m², and we got 116 cd/m² in the 100% sustained window test.

If you want the brightest image possible, we were able to get 428 cd/m² in the 2% peak window test in 'Expert (Dark Room)' Picture Mode with OLED Light and Contrast set to 'Max', Peak Brightness on 'High', and Dynamic Contrast set to 'Medium'.

6.0
Picture Quality
HDR Peak Brightness
HDR Real Scene Peak Brightness
454 cd/m²
HDR Peak 2% Window
454 cd/m²
HDR Peak 10% Window
542 cd/m²
HDR Peak 25% Window
386 cd/m²
HDR Peak 50% Window
231 cd/m²
HDR Peak 100% Window
128 cd/m²
HDR Sustained 2% Window
436 cd/m²
HDR Sustained 10% Window
517 cd/m²
HDR Sustained 25% Window
364 cd/m²
HDR Sustained 50% Window
220 cd/m²
HDR Sustained 100% Window
122 cd/m²
HDR ABL
0.093

Mediocre HDR peak brightness. It doesn't get bright enough to truly bright out highlights in HDR, and due to its aggressive ABL, the screen gets less bright as large, bright areas cover the screen. If you want a similar TV that gets brighter in HDR, look into the LG GX OLED.

We measured the HDR peak brightness on the 'HDR Cinema' Picture Mode with Color Temperature set to 'Warm 2', Peak Brightness set to 'High', and OLED Light on 'Max'. Like with SDR peak brightness, we ran a Pixel Refresher and the screen got a bit brighter after. Before the Pixel Refresher, most scenes were between 358 to 534 cd/m², and we got 117 cd/m² in the 100% sustained window test.

If you want the brightness image possible, set the Picture Mode to 'Vivid', Dynamic Contrast to 'Medium', OLED Light and Contrast to 'Max', and Peak Brightness on 'High'. We were able to get 706.8 cd/m² with a 10% peak window.

8.7
Picture Quality
Gray Uniformity
50% Std. Dev.
1.691 %
50% DSE
0.118 %
5% Std. Dev.
0.466 %
5% DSE
0.096 %

The LG OLED55BXPUA has excellent gray uniformity. There's very little dirty screen effect in the center, which is great for sports fans. Uniformity is improved in near-dark scenes, but like some other OLED TVs, there are some faint vertical lines that are visible in near-dark scenes in very dark rooms. Unlike the LG B9 OLED, the screen doesn't appear to flash in near-dark scenes.

8.6
Picture Quality
Viewing Angle
Color Washout
51 °
Color Shift
31 °
Brightness Loss
63 °
Black Level Raise
70 °
Gamma Shift
60 °

The LG BX OLED has excellent wide viewing angles, which is expected from an OLED TV. The image remains accurate when viewing from the side, great for wide seating arrangements.

10
Picture Quality
Black Uniformity
Native Std. Dev.
0.214 %
Std. Dev. w/ L.D.
N/A

Since this OLED TV can turn off individual pixels, the black uniformity is perfect.

9.3
Picture Quality
Reflections
Screen Finish
Glossy
Total Reflections
1.5 %
Indirect Reflections
0.2 %
Calculated Direct Reflections
1.3 %

The LG BX has outstanding reflection handling, similar to the LG CX OLED. Even with direct sunlight on this TV, the reflections shouldn't be too distracting.

8.2
Picture Quality
Pre Calibration
White Balance dE
2.62
Color dE
2.07
Gamma
2.22
Color Temperature
6299 K
Picture Mode
Expert (Dark Room)
Color Temp Setting
Warm 2
Gamma Setting
2.2

The LG BX has great out-of-the-box color accuracy, much better than the LG B9 OLED. Most people won't notice any inaccuracies in the colors and shades of gray, but since the color temperature is a bit warm, the image has a red/yellow tint. Gamma follows the target fairly well, but most scenes are a bit too dark.

We measured the color accuracy after completing a Pixel Refresher, but the accuracy only slightly improved afterward.

9.4
Picture Quality
Post Calibration
White Balance dE
0.26
Color dE
1.32
Gamma
2.20
Color Temperature
6536 K
White Balance Calibration
22 point
Color Calibration
Yes
Auto-Calibration Function
Yes

The LG BX has remarkable color accuracy after calibration, and any remaining inaccuracies can't be spotted without the aid of a colorimeter. Gamma follows the target almost perfectly and the color temperature is extremely close to the 6500K target.

We measured the color accuracy after completing a Pixel Refresher, which only slightly improved the color accuracy. Unlike the LG B9 OLED, we didn't notice any black crushing during calibration. There was some on the 'Standard' Picture Mode and switching to 'Expert (Dark Room)' Picture Mode removed it.

You can see our recommended settings here.

8.0
Picture Quality
480p Input

This TV upscales 480p content well, with no obvious artifacts.

8.0
Picture Quality
720p Input

The LG BX upscales 720p content, such as from cable boxes, well with no upscaling artifacts.

9.0
Picture Quality
1080p Input

1080p content looks almost as good as native 4k content.

10
Picture Quality
4k Input

The LG BX displays 4k content without any issues. Even though it has an RGBW pixel structure, all four sub-pixels are never on at the same time, so there's no loss in color resolution.

0
Picture Quality
8k Input

This is a 4k TV that can't display an 8k input.

Picture Quality
Pixels

The LG BX uses an RGBW pixel structure with four sub-pixels, but all four are never used at the same time. The above image shows the red, white, and blue sub-pixels. You can see the green pixel and other pixel structures in these three photos: Photo 1, Photo 2, Photo 3.

8.6
Picture Quality
Color Gamut
Wide Color Gamut
Yes
DCI P3 xy
95.90 %
DCI P3 uv
98.62 %
Rec 2020 xy
72.13 %
Rec 2020 uv
77.18 %

The LG BX has an excellent color gamut, very similar to the LG CX OLED. It covers almost all of the DCI P3 color space used in most HDR content and it has decent coverage of the wider Rec. 2020 color space. Before we ran a Pixel Refresher on the TV, the DCI P3 and Rec. 2020 coverage was only slightly better, but the differences are insignificant.

The EOTF in 'Cinema HDR' mode follows the curve almost perfectly until it rolls off at its peak brightness. The EOTF in 'Game' mode is very similar, except the roll-off is a bit more smooth.

If you find HDR too dim, set the Picture Mode to 'Vivid', and you can see the EOTF here. Enabling Dynamic Tone Mapping makes the image brighter in our EOTF test, but it changes the brightness according to each scene, so your experience may vary.

7.8
Picture Quality
Color Volume
Normalized DCI P3 Coverage ITP
82.5 %
10,000 cd/m² DCI P3 Coverage ITP
38.0 %
Normalized Rec 2020 Coverage ITP
73.8 %
10,000 cd/m² Rec 2020 Coverage ITP
34.2 %

Good color volume. Due to its infinite contrast ratio, it displays dark colors extremely well but struggles to display brighter colors.

Note that before performing a Pixel Refresher, it had a better DCI P3 color volume and slightly worse Rec. 2020 color volume, but most people won't notice the difference between the results before and after the refresh.

7.0
Picture Quality
Gradient
Color Depth
10 Bit
Red (Std. Dev.)
0.133 dE
Green (Std. Dev.)
0.136 dE
Blue (Std. Dev.)
0.112 dE
Gray (Std. Dev.)
0.197 dE

The LG BX has decent gradient handling. There's banding in every color, especially in the dark shades. Enabling the Smooth Gradation feature doesn't improve the test pattern. It slightly smooths out gradients in real scenes, but not by much. We ran a Pixel Refresher to see if it would improve the gradient handling, and it only improved a bit, but not significantly.

9.3
Picture Quality
Temporary Image Retention
IR after 0 min recovery
0.14 %
IR after 2 min recovery
0.13 %
IR after 4 min recovery
0.09 %
IR after 6 min recovery
0.00 %
IR after 8 min recovery
0.08 %
IR after 10 min recovery
0.05 %

Sadly, the LG OLED55BXPUA has some temporary image retention after displaying a high-contrast image, similar to the LG C8 OLED or the LG CX OLED monitor we tested. This varies between units, so you may experience something different.

Note that the image retention after six minutes shows 0.0%, but this is an error on our end and there's indeed some visible image retention after six minutes.

2.0
Picture Quality
Permanent Burn-In Risk
Permanent Burn-In Risk
Yes

Unfortunately, like most OLED TVs, the LG BX isn't immune to permanent burn-in. However, we don't expect people who watch varied content to have any issues, but rather it's a problem if there are constant static displays, like if it's used as a PC monitor.

This TV has three features to help burn-in risk. Enabling Screen Shift option, and setting Logo Luminance Adjustment to 'Low' may help with this. There's also an automatic Pixel Refresher that can be run manually if needed.

You can read about our investigation into this here.

Motion
9.7
Motion
Response Time
80% Response Time
0.2 ms
100% Response Time
3.8 ms

The LG BX has an outstanding response time, but it's not as good as some other OLED TVs like the LG CX OLED. It has overshoot in the darker transitions, which may lead to motion artifacts in dark scenes.

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

This TV doesn't use a pulse-width modulation (PWM) feature but there's a slight dip in brightness every 8 ms, which coincides with the 120Hz refresh rate and isn't noticeable.

10
Motion
Black Frame Insertion (BFI)
Optional BFI
Yes
Min Flicker for 60 fps
60 Hz
60 Hz for 60 fps
Yes
120 Hz for 120 fps
Yes
Min Flicker for 60 fps in Game Mode
60 Hz

The LG OLED55BXPUA has a Black Frame Insertion feature to improve the appearance of motion. For it to flicker at 60Hz for 60fps content, set TruMotion to 'User' and set OLED Motion to 'High'. For a 120Hz flicker, set OLED Motion to 'Low' or 'Medium', but that results in some duplication of motion, as seen here. Lastly, you can't use G-SYNC when the BFI feature is enabled.

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

This TV can interpolate content up to 120Hz, known as the 'Soap Opera Effect', which helps the appearance of motion. Motion looks alright with this feature and it doesn't stop interpolating in busy scenes, which results in some artifacts.

See here for the settings that control the motion interpolation feature.

5.3
Motion
Stutter
Frame Hold Time @ 24 fps
37.9 ms
Frame Hold Time @ 60 fps
12.9 ms

Due to the TV's extremely fast response time, there's noticeable stutter with lower-frame rate content as each frame in held on longer. Enabling motion interpolation or the BFI feature can help reduce stutter.

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 LG BX is able to remove 24p judder from any source, such as native apps or Blu-ray players. To remove judder, simply enable Real Cinema. With OLED Motion set to 'Medium' or 'Auto', it removes all judder. On 'Low', there's still some judder but it reduces it, and it doesn't remove judder at all when set to 'High'.

7.9
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
40 Hz
1080p VRR Maximum
120 Hz
1080p VRR Minimum
40 Hz
1440p VRR Maximum
120 Hz
1440p VRR Minimum
40 Hz
VRR Supported Connectors
HDMI

Update 08/19/2020: We confirmed that it supports HDMI Forum's VRR. With the Xbox One S connected, we disabled the FreeSync setting and enabled the G-SYNC setting on the TV. The Xbox showed VRR as still working, meaning it was working with HDMI Forum VRR.

The LG OLED55BXPUA has a 120Hz refresh rate and it has VRR support to help reduce screen tearing. With G-SYNC enabled, there's some minor glitching with 4k @ 120Hz content, similar to the LG CX OLED. We currently don't have an HDMI 2.1 source, but once we do, we expect to get a glitch-free experience with 4k @ 120Hz. FreeSync works with 4k @ 60Hz and not 4k @ 120Hz.

For G-SYNC to work, simply enable Instant Game Response in the settings menu and set the Picture Mode to 'Game'. For FreeSync, you also need to enable the AMD FreeSync Premium setting for the input you're using. Learn about our recommended gaming settings here.

Inputs
8.7
Inputs
Input Lag
1080p @ 60 Hz
15.0 ms
1080p @ 60 Hz Outside Game Mode
106.1 ms
1440p @ 60 Hz
14.8 ms
4k @ 60 Hz
14.5 ms
4k @ 60 Hz + 10 bit HDR
14.5 ms
4k @ 60 Hz @ 4:4:4
14.6 ms
4k @ 60 Hz Outside Game Mode
94.1 ms
4k @ 60 Hz With Interpolation
85.8 ms
8k @ 60 Hz
N/A
1080p @ 120 Hz
5.9 ms
1440p @ 120 Hz
5.7 ms
4k @ 120 Hz
11.6 ms
1080p with Variable Refresh Rate
5.9 ms
1440p with VRR
6.2 ms
4k with VRR