LG B8 OLED TV Review

Tested using Methodology v1.5
Updated Jul 13, 2018 at 08:28 am
LG B8 OLED Picture
8.5
Mixed Usage
Value for price beaten by
: LG BX OLED
9.3
Movies
8.1
TV Shows
8.5
Sports
8.3
Video Games
8.6
HDR Movies
8.1
HDR Gaming
8.2
PC Monitor
Type OLED
Sub-Type
WRGB
Resolution 4k

The LG B8 is a 4k OLED TV with excellent picture quality, especially when viewed in a dark room. It can produce perfectly deep blacks due to the emissive technology, and has excellent motion handling with an instantaneous response time. The image also remains accurate when viewed at an angle, which is good for those who have wide seating. It isn't without downsides though, as the screen brightness changes depending on the content which can be distracting, and there may be a risk of permanent burn-in if you watch long periods with static content.

Our Verdict

8.5 Mixed Usage

This is a remarkable TV for mixed usage. The LG B8 performs impressively well in almost every usage. It is great for movie watching in both SDR and HDR content. It has remarkable motion handling and low input lag that will satisfy gamers and sports fans.

Pros
  • Perfect deep blacks
  • Almost no motion blur in sports and video games
  • Very good picture quality when viewed at an angle
Cons
  • Brightness depends on screen content due to Automatic Backlight Limiter (ABL)
  • Risk of permanent burn-in with long periods of static content
9.3 Movies

The LG B8 is outstanding for watching movies. The picture quality is great for dark rooms due to the perfect blacks and great image uniformity. Combined with the excellent 4k resolution display, it makes this TV a great choice for the movie enthusiasts.

8.1 TV Shows

The LG OLED B8 is impressive for watching TV shows. It has great reflection handing and great viewing angles so you can place it in large bright rooms. It will upscale cable content well and you can enjoy your favorite TV show without worries.

8.5 Sports

This is an awesome TV for watching sports. It has very good gray uniformity do panning shot will be clear from clouding, excellent motion handling for fast moving content and very good viewing angles to allow you to watch sport with a group of friends in wide seating arrangements.

8.3 Video Games

The LG B8 is amazing when playing video games. It has an excellent low input lag, amazing response time and can support a multitude of resolutions. It is equipped with the black frame insertion (BFI) feature that will clear blur and make the image look crisper.

8.6 HDR Movies

This LG B8 has outstanding performance when watching HDR movies. The real blacks and the wide color gamut offer an awesome picture quality when combined with HDR content. Highlights pop, colors are rich and the whole image is vivid and comes to life. It is an excellent TV for enjoying your favorite HDR content.

8.1 HDR Gaming

This LG B8PUA is excellent for HDR gaming. It has a very low input lag when showing HDR content and a remarkably low response time, that makes it very responsive. The picture quality is excellent and most gamers will be happy.

8.2 PC Monitor

Using the LG OLED B8 as a PC monitor is great. It has a remarkably low input lag and great motion handling. It feels very responsive and the good viewing angles allow you to sit close to it without experiencing uniformity issues. It will keep most people who want to use it as a PC monitor happy although you should keep in mind the OLEDs permanent burn-in risk.

  • 8.5 Mixed Usage
  • 9.3 Movies
  • 8.1 TV Shows
  • 8.5 Sports
  • 8.3 Video Games
  • 8.6 HDR Movies
  • 8.1 HDR Gaming
  • 8.2 PC Monitor
  1. Update 5/21/2020: Converted to Test Bench 1.5.
  2. Update 2/21/2020: Converted to Test Bench 1.4.
  3. Update 2/28/2019: Converted to Test Bench 1.3.
  4. Update 12/10/2018: We have retested the B8 on firmware 04.10.06, and have updated the peak brightness and input lag.

Test Results

Design
9.5
Design
Style
Curved No

The design of the LG OLED B8 is excellent. It has a feel of premium both due to the build quality and the sleek design. The design is almost identical to the C8 but with a different stand. On the B8, the stand that supports the TV is not very wide and will fit in most tables. If you choose to wall mount the TV most inputs will be easily accessible. The operating temperature of the TV is good and you should have no issues with it. Care should be taken when handling the TV as the panel is extremely thin and can be easily damaged if not handled properly.

Design
Stand

The stand is metallic and provides a steady support to the TV. It is quite narrow and will fit in most tables. It resembles the stand of last years' C7.

Footprint of the 65" TV stand: 21.7" x 8.9"

Design
Back
Wall Mount VESA 300x200

The back of the TV is plain and resembles a lot the back of previous OLED LG TVs. There is only basic cable management as you can see here. The HDMI inputs are facing to the side and would be easily accessible if wall mounted, but there are a few secondary ones on the back that are facing outwards and may be difficult to access. The control button is located on the back to the side, similar to the C8.

Design
Borders
Borders 0.39" (1.0 cm)

The borders of the LG B8PUA are very thin and look great and look very similar to the LG C8.

Design
Thickness
Max Thickness 1.93" (4.9 cm)

The TV panel is extremely thin like most latest LG OLEDs. The thickness of the TV, which is still quite thin, is only due to the electronics compartment.

9.0
Design
Build Quality

The build quality of the LG OLED B8 is excellent. There are no obvious build issues or gaps and the TV feels solid. You should be careful when moving the TV because of the thin screen.

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

The LG B8 has an infinite contrast ratio as it can switch off individual pixels and thus create perfect blacks when viewed in dim environments. This is great for movies enthusiasts.

10
Picture Quality
Local Dimming
Local Dimming
No
Backlight
No Backlight

Just like all OLEDs, the B8 has no need for local dimming as it can switch off each pixel individually. The video is for reference only.

6.4
Picture Quality
SDR Peak Brightness
SDR Real Scene Peak Brightness
288 cd/m²
SDR Peak 2% Window
312 cd/m²
SDR Peak 10% Window
310 cd/m²
SDR Peak 25% Window
310 cd/m²
SDR Peak 50% Window
310 cd/m²
SDR Peak 100% Window
146 cd/m²
SDR Sustained 2% Window
298 cd/m²
SDR Sustained 10% Window
298 cd/m²
SDR Sustained 25% Window
297 cd/m²
SDR Sustained 50% Window
298 cd/m²
SDR Sustained 100% Window
141 cd/m²
SDR ABL
0.053

The SDR peak brightness of the LG OLED B8 is very good. The TV gets bright enough to be placed in most rooms. The small highlights look bright in SDR content, but as the whole screen brightness increases the Automatic Brightness Limiter (ABL) is activated and the screen gets dimmer. This is not an abnormal behavior and is also encountered in other premium models like the LG C8, which has very similar behavior. The difference in brightness between the B8 and C8 may be due to panel variance. The B8 is significantly less bright than the LED Sony X900F or the QLED Samsung Q8FN.

Update 11/27/2018: We retested with the latest firmware (04.10.06) and found that, while the HDR brightness remained generally unchanged, the SDR brightness decreased by 50 cd/m² in all but the 100% window which remained unchanged. Results found above are updated.

6.6
Picture Quality
HDR Peak Brightness
HDR Real Scene Peak Brightness
548 cd/m²
HDR Peak 2% Window
722 cd/m²
HDR Peak 10% Window
693 cd/m²
HDR Peak 25% Window
487 cd/m²
HDR Peak 50% Window
318 cd/m²
HDR Peak 100% Window
159 cd/m²
HDR Sustained 2% Window
660 cd/m²
HDR Sustained 10% Window
662 cd/m²
HDR Sustained 25% Window
472 cd/m²
HDR Sustained 50% Window
307 cd/m²
HDR Sustained 100% Window
153 cd/m²
HDR ABL
0.090

The HDR peak brightness is decent. This is worse than the C8 model which gets about 100 nits brighter in our real scene test pattern. Part of this may be due to panel variance, and part of it may be due to an algorithm change with a firmware update. We will retest our C8 to see if the brightness behavior has changed. Although the TV can display small highlights well, as larger areas of the screen are lit the level of the brightness diminishes due to the Automatic Bright Limiter (ABL) and this is not good. The LG B8 can't get as bright as high-end LED TVs like the Sony X900F or QLED Samsung Q8FN that have excellent HDR brightness.

If you find HDR content too dim, see our recommended settings.

Update 11/27/2018: We retested with the latest firmware (04.10.06) and found that the HDR brightness remained generally unchanged. Results found above are updated.

7.9
Picture Quality
Gray Uniformity
50% Std. Dev.
2.454 %
50% DSE
0.131 %
5% Std. Dev.
1.490 %
5% DSE
0.141 %

The gray uniformity of the LG OLED B8 is very good and most people will not notice any clouding. This makes it a very good TV for sports watching as the great gray uniformity results in very little dirty screen effect during wide panning shots.

However, in the 5% gray uniformity picture there are some vertical bands that are visible when watching dark scenes in a dark room. We've found similar behavior on other 2018 OLED like the C8 and A8F. This is only rarely noticeable in a dark room.

8.8
Picture Quality
Viewing Angle
Color Washout
48 °
Color Shift
29 °
Brightness Loss
67 °
Black Level Raise
70 °
Gamma Shift
69 °

The viewing angles are very good just like most OLEDs. This makes it a great choice for wide rooms since the picture quality remains good even when watching from the side. When viewed at an angle, colors do shift, but less than LCD TVs with a VA or IPS panel.

10
Picture Quality
Black Uniformity
Native Std. Dev.
0.315 %
Std. Dev. w/ L.D.
N/A

The LG B8 has perfect black uniformity since, like all OLEDs, the pixels can completely shut off. This is especially well suited to watching movies in a dark room.

9.2
Picture Quality
Reflections
Screen Finish
Glossy
Total Reflections
1.5 %
Indirect Reflections
0.1 %
Calculated Direct Reflections
1.4 %

The LG B8 has excellent reflection handling. There is a glossy finish that makes reflections more well defined but at a very low intensity. There is a slight purple tint to the reflections due to the antireflective coating. This is very common in other high-end TVs like the C8 and or the Q8FN and is not really noticeable. You should have no problem using this TV in a bright room.

6.9
Picture Quality
Pre Calibration
White Balance dE
3.72
Color dE
3.16
Gamma
2.17
Color Temperature
5868 K
Picture Mode
Expert (Dark Room)
Color Temp Setting
Warm 2
Gamma Setting
2.2

The out-of-the-box color accuracy is decent. The best results were obtained when the Picture Mode was set to Expert(Dark Room). The white dE and the color dE were greater than our threshold of 3 and some people will notice those inaccuracies. Gamma was at 2.38 and thus shadows will look too bright, whereas the color temperature was warm with red and yellow tones dominating the image.

9.5
Picture Quality
Post Calibration
White Balance dE
0.11
Color dE
1.29
Gamma
2.20
Color Temperature
6513 K
White Balance Calibration
20 point
Color Calibration
Yes
Auto-Calibration Function
Yes

The post calibration color accuracy is remarkable. The white dE is almost perfect and the color dE is well below 3. Gamma is spot on 2.2, and the color temperature is very close to the target of 6500K.

8.0
Picture Quality
480p Input

Upscaling of DVDs or other 480p content is good, with no obvious artifacts.

8.0
Picture Quality
720p Input

There are no issues when upscaling 720p content.

9.0
Picture Quality
1080p Input

Upscaling of 1080p content such as Blu-rays looks good. The image is good and there are no obvious issues.

10
Picture Quality
4k Input

Native 4k content is displayed well on the LG B8 with no issues.

0
Picture Quality
8k Input
Picture Quality
Pixels

With WRGB OLEDs all four subpixels are never on at the same time, so we have two photos.

Alternative pixel picture.

8.5
Picture Quality
Color Gamut
Wide Color Gamut
Yes
DCI P3 xy
96.25 %
DCI P3 uv
98.00 %
Rec 2020 xy
70.64 %
Rec 2020 uv
74.77 %

The LG B8 has an excellent wide color gamut as it covers an impressive amount of the DCI P3 color space and also performs very well in Rec 2020. These results are nearly identical to the C8.

In the Cinema HDR picture mode the TV's EOTF follows the target PQ curve fairly closely, until it starts to roll off gradually to the TV's peak brightness. If you find HDR content too dim you can set the Dynamic Contrast setting to High, which raises the EOTF and brightens most HDR scenes. The EOTF in the Game picture mode is nearly identical to that of Cinema, which is good.

In HDR on our unit the black level was raised on the left side of the screen, but could be fixed by lowering the Brightness setting to 49. We don't expect most B8 units to have this issue, as we've seen a few OLEDs with black level issues in the past, and many have fixed themselves over time. We'll recheck the black level after the TV has 100 hours of cumulative use.

Update 11/15/2018: The TV has been now used for 127 hours, and the black level is no longer raised in HDR.

6.8
Picture Quality
Color Volume
Normalized DCI P3 Coverage ITP
75.7 %
10,000 cd/m² DCI P3 Coverage ITP
37.3 %
Normalized Rec 2020 Coverage ITP
59.7 %
10,000 cd/m² Rec 2020 Coverage ITP
29.3 %

The color volume coverage is decent. Although the TV is has a wide color gamut it loses volume at the top because of its WRGB pixel structure. It can use the white subpixel to make white very bright, but it can't do the same to produce saturated colors, and thus the colors are not as bright.

8.8
Picture Quality
Gradient
Color Depth
10 Bit
Red (Std. Dev.)
0.091 dE
Green (Std. Dev.)
0.098 dE
Blue (Std. Dev.)
0.076 dE
Gray (Std. Dev.)
0.082 dE

The gradient on this TV is excellent. Although there is some banding in the above test image, in normal content very little or no banding is visible. We trust the full test results as we have seen this with other LG TVs like the SK8000 and the reason is explained well here.

In HDR, setting MPEG Noise Reduction to Low activates a gradient smoothing feature.

9.9
Picture Quality
Temporary Image Retention
IR after 0 min recovery
0.03 %
IR after 2 min recovery
0.00 %
IR after 4 min recovery
0.00 %
IR after 6 min recovery
0.00 %
IR after 8 min recovery
0.00 %
IR after 10 min recovery
0.00 %

The LG B8 shows almost no signs of image retention except for minor issues less than 2 minutes after recovery time and this is very hopeful.

Note however, that there is some panel variation even within the same model and some panels may be more or less prone to image retention. For example this is the same panel as the LG C8 we tested which shows more signs of image retention.

At the same time this test is only indicative of short-term image retention and not the permanent burn-in that may occur with prolonged exposure to static images. You can read about the test we are currently running to help us better understand permanent burn-in here.

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

Update 11/01/2019: Updated text to include our stance on burn-in.

Although we don't expect most people who watch varied content to have any issues, OLED TVs, such as the LG OLED B8 do have the possibility of experiencing burn in. This TV has three features to decrease the risk of burn-in.

We recommend enabling Pixel Refresher and Screen Shift, and setting Logo Luminance Adjustment to Low.

You can see our investigation into this issue here.

Motion
9.9
Motion
Response Time
80% Response Time
0.3 ms
100% Response Time
1.1 ms

The response time of the LG OLED B8 is instantaneous and this is great for fast moving content.

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

Just like all OLED TVs, there is no visible backlight flicker. This helps motion appear smoother, but results in some persistence blur. If you want to minimize blur, you can enable the BFI option available in this TV.

8.7
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
No
Min Flicker for 60 fps in Game Mode
60 Hz

The LG B8P, just like the C8, has an optional BFI mode that can help reduce blur and make the image crisper. It can be enabled by setting 'Motion Pro' to 'On'.

TruMotion (BFI and motion interpolation) is grayed out when displaying 120Hz.

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

The LG B8 has remarkable motion interpolation. It is nearly perfect during slow-moving shots, and it stops if there is too much motion. When fast motion is displayed some people might notice very few artifacts.

To interpolate low fps content to 60Hz, set TruMotion to User and raise the De-Judder slider. To interpolate 60Hz content to 120Hz, raise the De-Blur slider.

If you find the artifacts caused by motion interpolation bothersome, we recommend lowering the interpolation setting to make the algorithm more conservative, but this will also cause motion to look less smooth.

4.7
Motion
Stutter
Frame Hold Time @ 24 fps
40.6 ms
Frame Hold Time @ 60 fps
15.6 ms

This LG OLED B8 has bad stutter on slow fps content. It has bad stutter on low fps content due to the instantaneous response time. This can result in jarring motion during panning shots on 24p movies. If you find stutter bothersome, you can remove it using the excellent motion interpolation features of the TV.

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 B8P has excellent handling of judder as it can display 24p movies without judder from the most common sources. To remove judder the Real Cinema option must be turned on.

Update 10/05/2018: We have retested the B8 after firmware 04.10.06, and it is no longer necessary to set TruMotion to 'User' to remove Judder. Simply enabling Real Cinema will remove Judder from all sources on the B8. Like the C8, there is always judder when BFI is enabled.

0
Motion
Variable Refresh Rate
Native Refresh Rate
120 Hz
Variable Refresh Rate
No
HDMI Forum VRR
No
FreeSync
No
G-SYNC Compatible
No
4k VRR Maximum
N/A
4k VRR Minimum
No VRR support
1080p VRR Maximum
N/A
1080p VRR Minimum
No VRR support
1440p VRR Maximum
N/A
1440p VRR Minimum
No VRR support
VRR Supported Connectors
No VRR support

The LG B8 has a native 120Hz panel but does not support variable refresh rate technology.

Inputs
7.9
Inputs
Input Lag
1080p @ 60 Hz
21.3 ms
1080p @ 60 Hz Outside Game Mode
41.9 ms
1440p @ 60 Hz
N/A
4k @ 60 Hz
21.3 ms
4k @ 60 Hz + 10 bit HDR
21.3 ms
4k @ 60 Hz @ 4:4:4
21.3 ms
4k @ 60 Hz Outside Game Mode
50.2 ms
4k @ 60 Hz With Interpolation
91.9 ms
8k @ 60 Hz
N/A
1080p @ 120 Hz
21.9 ms
1440p @ 120 Hz
N/A
4k @ 120 Hz
N/A
1080p with Variable Refresh Rate
N/A
1440p with VRR
N/A
4k with VRR
N/A
8k with VRR
N/A
Auto Low Latency Mode (ALLM)
No

The input lag is excellent.

4:4:4 chroma subsampling is only properly displayed in the PC input mode and when in that input mode, all picture modes have the same low input lag.

In HDR when 4:2:0 chroma is sent there's an extra 120 Hz frame (8.3 ms) of input lag. This bug was also seen on other 2018 LG TVs like the C8 and SK8000, and is explained in more detail in the SK8000 review.

Update 11/27/2018: We retested with the latest firmware update (04.10.06) and found two previous bugs had been fixed. Now 4k in HDR has the same input lag as in SDR and 4k @ 60Hz @ 4:4:4 + 8 bit HDR is properly being displayed and has been measured.

8.3
Inputs
Supported Resolutions