- Table of Contents
- Intro
- Design
- Picture Quality
- Motion
- Inputs
- Sound Quality
- Smart Features
- Sizes and Variants
- Compared
- Conclusion
- Discussions
LG B7/B7A OLED
TV REVIEW
The LG B7 is a high-end 4k OLED smart TV with exceptional picture quality thanks to its infinite contrast ratio and wide viewing angle. It produces little motion blur, and its ability to reproduce a very wide gamut of colors and relatively high peak brightness helps it produce an impressive HDR image. It does, however, tend to retain a ghost of static images temporarily and isn't quite as bright as some LCD TVs. It offers the same performance as the B7P found at warehouse stores like Costco and Sam's club.
| Design | 9.5 |
| Picture Quality | 8.6 |
| Motion | 8.5 |
| Inputs | 9.0 |
| Sound Quality | 6.3 |
| Smart Features | 8.2 |
- Perfectly uniform blacks thanks to infinite contrast
- Great picture even from an angle
- Low input lag for gaming
- Static images can get "stuck" temporarily
- Screen brightness varies with content being displayed (ABL)
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Design
The design of the LG B7 OLED is excellent. The TV looks impressive, with a very thin screen and thin borders. It doesn't have the front-facing soundbar of the E7, and instead, sits on a stand similar to the B6. Some of the rear-facing inputs may be difficult if placed close to a wall, but the two HDMI and two USB ports on the side are easily accessible.
The stand of the B7A has a relatively small footprint and looks very similar to the B6 we reviewed last year. It has a clear support, which looks good and overall feels stable.
Footprint of the 55" TV stand: 8.9" x 22.2"
The TV actually stays quite cool when playing HDR content, but it may get warmer when playing bright SDR content.
Picture Quality
- 11% Contrast
- 6% Local Dimming
- 6% SDR Peak Brightness
- 6% HDR Peak Brightness
- 6% Gray Uniformity
- 7% Viewing Angle
- 4% Black Uniformity
- 6% Reflections
- 4% Pre Calibration
- 1% Post Calibration
- 6% 480p Input
- 9% 720p Input
- 11% 1080p Input
- 5% 4k Input
- 4% Color Gamut
- 4% Color Volume
- 2% Gradient
- 1% Temporary Image Retention
- 1% Permanent Burn-In Risk
The LG B7 OLED TV has a remarkable picture quality. When set in a dark room, the amazing contrast ratio and the excellent black uniformity makes for a great home cinema experience, where dark scenes are well reproduced, with deep blacks. When set in the brighter room, its very good SDR peak brightness and excellent capacity to deal with reflection mean the B7A can also be a very good option to watch TV shows and movies during the day. The B7 is a good TV for people with a large living room since it has a very good viewing angle and picture quality remain good no matter where you will be sitting. The B7A is also a good TV for the sport's amateur, as the gray uniformity is great and dirty screen effect is not really a problem. Finally, when it comes to HDR, the B7 is excellent, as the mix of perfect blacks and good HDR peak brightness produces strong specular highlights, and when you add the wide color gamut, you can really experience a great HDR experience.
As with other LG OLED TVs, the B7 has a perfect contrast ratio. As a result, it makes for a perfect TV for a dark home theater.
As the technology used in OLED TVs completely shuts off the emissive pixels when displaying black, there is no need for a local dimming option on the B7A.
- 64% SDR Real Scene Peak Brightness
- 5% SDR Peak 2% Window
- 5% SDR Peak 10% Window
- 5% SDR Peak 25% Window
- 5% SDR Peak 50% Window
- 5% SDR Peak 100% Window
- 2% SDR Sustained 2% Window
- 2% SDR Sustained 10% Window
- 2% SDR Sustained 25% Window
- 2% SDR Sustained 50% Window
- 2% SDR Sustained 100% Window
- 1% SDR ABL
Good SDR peak brightness, good enough for most bright rooms. Like other OLED TVs, the B7A unfortunately has an Automatic Brightness Limiter (ABL), though in this case it only lowers the brightness for scenes with a very high average brightness like our 100% white window. This means that the ABL should be rarely noticeable while watching normal content. However, it is very noticeable during PC monitor use as white windows are common. Overall, the B7A's brightness is very similar to its siblings the OLED C7 and E7P, but behind many high end LCD TVs like the Sony X930E and Vizio P Series 2017.
- 63% HDR Real Scene Peak Brightness
- 5% HDR Peak 2% Window
- 5% HDR Peak 10% Window
- 5% HDR Peak 25% Window
- 5% HDR Peak 50% Window
- 5% HDR Peak 100% Window
- 2% HDR Sustained 2% Window
- 2% HDR Sustained 10% Window
- 2% HDR Sustained 25% Window
- 2% HDR Sustained 50% Window
- 2% HDR Sustained 100% Window
- 2% HDR ABL
Good HDR peak brightness. Because each OLED pixel is its own light source, in a typical HDR scene the TV can use the power savings from the dim pixels to make the bright pixels even brighter, producing a good brightness in our real scene test. This isn't as helpful in very bright scenes like our 50% white window test, where the TV's Automatic Brightness Limiter (ABL) dims the TV significantly, but luckily such bright scenes are rare in HDR content. Overall, the brightness is similar to the OLED C7 and E7P, but not as good as some high end LCD TVs like the Sony X930E and the Samsung Q9F. If users find the B7A too dim, increasing the 'Dynamic Contrast' setting will make the scene brighter but won't change the brightness of highlights.
- 40% 50% Std. Dev.
- 40% 50% DSE
- 10% 5% Std. Dev.
- 10% 5% DSE
The overall gray uniformity of the B7A is great. On the 50% gray test picture, some warmer patches are visible (on the left side of the screen), but those are mainly visible when displaying a uniform gray color and do not affect normal content. Since the screen is pretty even, no dirty screen effect is visible when watching sports like football or hockey.
On the 5% gray, some really faint vertical line are visible, but this is similar to other 2017 LG OLED TVs. Luckily, this is only visible in dark room and while looking at very dark uniform colors, which is fairly rare in TV shows or movies.
- 20% Color Shift
- 40% Brightness
- 40% Black Level
Great viewing angle, far better than most LED TVs, as expected of an OLED. Blacks remain perfectly black and the brightness decreases only slowly at an angle, though colors do degrade more quickly. Overall, this TV is an excellent choice for a room where people often sit to the side of the TV and view it at an angle.
- 75% Native Std. Dev.
- 25% Std. Dev. w/ L.D.
The B7 has a perfect black uniformity since when displaying a perfect blacks image, the screen is completely shut off and unlike LCD TV, no light bleed occurs.
The B7 is excellent at handling reflections. It has the same glossy finish and anti-reflective coating as the C7 and E7, which works very well to reduce the intensity of direct reflections and glare. The glossy screen doesn't distort or reduce the sharpness of the screen. As with other high-end TVs, there is a purple tint as a result of the coating which is most visible when the TV is off. Most people won't mind this, and overall, the reflection handling is fine even in a bright room.
- 46% White Balance dE
- 45% Color dE
- 9% Color Temperature
Out of the box, when set on 'ISF Expert (Dark Room)', the accuracy of the B7A could be better. Both the white balance dE and color dE are high enough so that most enthusiasts would notice the inaccuracies. Note that the 'technicolor Expert mode' has the same accuracy than the 'ISF Expert (Dark Room).
The gamma is a bit higher than our desired 2.2 target and if you do not intend to calibrate your TV and notice that there is black crush (loss of detail in the dark region of the screen), you could simply raise the gamma in the 'Expert controls' menu and it should fix this issue.
- 46% White Balance dE
- 45% Color dE
- 9% Color Temperature
After calibration, all the issues were corrected and the white balance dE and color dE was brought down significantly and are now well below what most people would notice. The gamma value is right on our 2.2 target and the curve is now following our target curve very well. The calibration process went well and the 2 points and the 20 points white balance correction were easy to apply and the precision of both helped considerably. The color space management system was also precise and easy to use.
You can see our recommended settings here.
- 25% DCI P3 xy
- 25% DCI P3 uv
- 25% Rec 2020 xy
- 25% Rec 2020 uv
Great wide color gamut, one of the best of 2017, and only a little worse than the Samsung QLEDs like the Q7. Saturated colors in HDR content will be well represented. The TV's accuracy with the colors within its gamut could be better, as almost all points artificially undershoot their targets and saturated cyan turns green.
The EOTF in the technicolor picture mode (with Active HDR on) follows the target PQ curve almost perfectly until it clips at its peak brightness. The EOTFs in Game and PC modes have similarly great accuracy. Raising the 'Dynamic Contrast' setting above 'Low' will make the EOTF brighter, which may be useful when watching HDR in a bright room.
Update 11/10/2017: The Active HDR feature ('Dynamic Contrast: Low') doesn't work in Game or PC mode; 'Dynamic Contrast: Low' only applies normal dynamic contrast (brightens the EOTF a bit near the high end). Our Game and PC mode EOTF tests were done with 'Dynamic Contrast: Off'.
Decent color volume. The OLED panel is able to show its wide color gamut at incredibly low brightness, which is great. Unfortunately, it loses a lot of color volume at high brightness because it cannot make saturated colors nearly as bright as it can make pure white, because of its RGBW pixel structure.
- 25% Red (Std. Dev.)
- 25% Green (Std. Dev.)
- 25% Blue (Std. Dev.)
- 25% Gray (Std. Dev.)
The B7 can display our gradient test image very good and no banding normally seen on 8-bit TV can be noticed. Some imperfection can be seen in darker colors and grayscale, but this is in lines with other OLED TV like the C7 and E7P and it does not cause major banding when watching normal content.
Update 2017-11-07: Note that when the TV is set to 'PC' mode, via the input menu, the banding is much more visible, and this for all picture modes.
The LG B7 has a bad result on our image retention test, as we detected some faint ghost remnant of the Rtings logos even after 10 minutes of recovery. This is a worse result than we tested on the C7 and the E7, which were both better on this test and this result is more in line with the 2016 B6. This is likely only due to panel variance though, as all 2017 LG OLED TVs should perform very similarly as the panel used in those supposed to be the same. Playing normal video content for a couple more minutes did make any image retention that was still visible go away though.
As mention on for the C7, if you find out that your TV has some image retention after playing video games for a long time or after having watched a news channel with a static logo, there is a function in the 'Picture settings' page, under 'OLED Panel Settings' named 'Pixel Refresher' that will 'recalibrate' the screen to get rid of any imprinted images that may still visible. This procedure lasts around one hour, and the TV needs to be shut off for it to work. This can usually take care of any image retention if watching normal content (without static image) did not make it go away.
'Screen Shift' is also another feature that will 'move' slightly (couple pixels) the screen to make the image retention less problematic. For our test, this feature was turned on but there was still some image retention anyway, so this function is not perfect.
Note that this temporary retention is not the same as permanent image retention (burn-in), which requires looking at the performance of the TV over a long time (months or years).
Note that there is a variation in temporary image retention between units.
OLED panels such as the B7 do have the possibility of experiencing burn in. You can see our investigation into this here.
Motion
- 53% Response Time
- 11% Flicker-Free
- 3% Black Frame Insertion (BFI)
- 5% Motion Interpolation
- 12% Stutter
- 11% 24p Judder
- 5% Variable Refresh Rate
Motion looks excellent on the B7 OLED. It has near-instant pixel response time, flicker-free lighting, judder-free 24p playback from almost any source, and 120 fps motion interpolation. The only thing it's missing is black frame insertion, which would've only been useful for gaming or when using motion interpolation.
- 50% 80% Response Time
- 50% 100% Response Time
Near-perfect pixel response time, far better than any LED TV, as expected of an OLED. All the blur in the image is due to 60 fps persistence, no response time blur can be seen. The black to 20% dark grey transition does have some overshoot, but this shouldn't be too visible.
Unfortunately, this lack of motion blur is a disadvantage when watching movies when motion interpolation is not enabled, as the very low frame rate of movies is made more obvious by the lack of blur, causing them to look more stuttery than normal.
The OLED panel dims without using any PWM, which is great because PWM adds double image artifacts. Some small flicker is measurable, but this shouldn't be visible.
Unfortunately this TV doesn't have the option to add flicker using black frame insertion, which would reduce persistence blur when gaming or using motion interpolation, like the Sony A1E does.
The TV can use the soap opera effect to interpolate the frame rate of nearly any content into smooth 120 Hz. This significantly reduces motion blur, but this smooth motion may appear strange to those not used to it. Unfortunately this TV's interpolation isn't as good as on some other TVs: the motion stuttered at times during normal content, especially cartoons, and artifacts would appear in rare cases.
To activate motion interpolation for lower frame rate content, set 'TruMotion' to 'User' and raise the 'De-Judder' slider. For 60 fps content, raise the 'De-Blur' slider.
Update 11/13/2017: The motion interpolation performance has been clarified in the text.
The LG B7A is bad at showing low frame rate content without stutter. The frame transition occurs almost instantaneously which can be quite jarring, as the image is static for about 40ms each frame of a movie. This is especially noticeable with wide panning shots. The only way to reduce this stutter is to increase the frame rate of the content through motion interpolation.
The B7P can display 24p movies without judder from 24p, 60p, and 60i sources.
For 24p movies playing from 24p sources like DVD or Blu-rays players, the 'Real Cinema' option must be turned on, and the 'TrueMotion' set to 'User' with both the 'De-Judder' and 'De-Blur' sliders set to zero.
For 24p movies playing over 60p/60i sources like cable boxes, simply turn on the 'Real cinema' option to remove judder.
- 25% 4k VRR Maximum
- 25% 4k VRR Minimum
- 25% 1080p VRR Maximum
- 25% 1080p VRR Minimum
The LG B7 has a native 120Hz panel, but doesn't support any variable refresh rate features such as FreeSync and G-Sync.
Inputs
- 86% Input Lag
- 14% Supported Resolutions
The B7 OLED can properly display almost all content, including HDR. It also has excellent low input lag, which should please all but the most competitive gamers.
- 35% 1080p @ 60Hz
- 3% 1080p @ 60Hz + HDR
- 37% 4k @ 60Hz
- 19% 4k @ 60Hz + HDR
- 3% 4k @ 60Hz @ 4:4:4
- 3% 4k @ 60Hz @ 4:4:4 + 8 bit HDR
Excellent low input lag, good enough for all but the most competitive gamers. Normally only the 'Game' picture mode has low input lag, however when in 'PC' mode all picture modes have low input lag. 4:4:4 color is only properly displayed in PC mode, but it's usually only relevant for PC use anyways. Overall, the input lag is very similar to the LG C7 and most Samsung TVs, and better than most Sony TVs, but not quite as good as the LG SJ9500 and TCL P607.
- 17% 1080p @ 60Hz @ 4:4:4
- 17% 1080p @ 120Hz
- 17% 1440p @ 60Hz
- 17% 4k @ 30Hz @ 4:4:4
- 16% 4k @ 60Hz
- 16% 4k @ 60Hz @ 4:4:4
All common resolutions are supported. 4k @ 60 Hz @ 4:4:4 or 4:2:2 color is only supported when 'HDMI Ultra HD Deep Color' is enabled. 4:4:4 color is only shown properly when the input's icon is set to 'PC' (aka PC mode). 1080p @ 120 Hz is an officially supported resolution, and thus doesn't need a custom resolution like on Sony TVs.
Sound Quality
- 75% Frequency Response
- 25% Distortion
The LG B7 features the same "Magic Sound Tuning" room correction feature found on other high-end LG TVs, but it's less powerful set of speakers means its performance is still only average. It's not bad, but a good sound bar will provide a significant upgrade to the sound quality.
- 30% Low-Frequency Extension
- 5% Std. Dev. @ 70
- 20% Std. Dev. @ 80
- 15% Std. Dev. @ Max
- 20% Max
- 10% Dynamic Range Compression
Passable frequency response. The LG's room correction feature helps the TV track our target quite well, but it does have a slight overemphasis in the treble range that makes the TV sound a little bright. However, the TV uses a significant amount of dynamic range compression to reach higher volume settings, and it doesn't make it very loud.
- 40% Weighted THD @ 80
- 25% Weighted THD @ Max
- 10% IMD @ 80
- 25% IMD @ Max
Average distortion performance. The LG B7's THD levels are relatively low at most volumes, but IMD rises significantly when the volume is increased. Since minor aliasing appears at higher levels for very little actual volume gain, it is better to keep the slider under the 50% mark.
Smart Features
- 42% Interface
- 2% Ad-Free
- 37% Apps and Features
- 16% Remote
- 3% Remote App
The B7 uses LG's WebOS smart platform, which is fast to navigate, has lots of apps and has a great remote. The interface is split into three sections; apps, settings and inputs; each with its own button on the remote, quick menu and full menu. This makes the interface fast to navigate, but may be confusing for first-time users. The included LG Magic Remote is one of the best and makes a cursor on screen follow the remote's movement, much like a Nintendo Wii remote, which saves time when browsing the TV.
The WebOS interface is divided into three parts; apps, settings and inputs; each with its own button on the remote, quick menu and full menu. The quick menus list many common items to save time, while the full menus give a wealth of deeper options. This split structure saves time but may be confusing for first-time users.
There are ads in voice search results, video ads in the LG Content Store, and suggested content in the apps quick menu, which can be annoying.
The TV comes preloaded with most popular apps like Netflix, Amazon Video and YouTube. Many more can be downloaded from the LG Content Store, which has more apps than most other smart platforms but not as many as on Samsung TVs and Android TVs.
The B7A comes with LG's excellent Magic Remote, which has some useful smart features and clever design choices. Although the remote is large, most of its thickness and weight is at the bottom where your hand is, so it feels very ergonomic to use. The remote's standout feature is making an onscreen cursor follow the remote's movement, much like a Nintendo Wii remote. This allows you to select menu items directly, which saves time. The remote also has a microphone for voice search, which searches for content and apps to download but also has other uses like switching HDMI inputs.
The WebOS remote app has some useful features such as casting content from a phone or tablet but is missing some other features like text entry.
There is a joystick on the bottom edge of the TV that doubles as the power button. Pushing the joystick left and right raises and lowers the volume, while pushing it up and down changes channels. Pressing it brings up a ring menu with three icons: power, inputs and settings. Selecting settings gives you access to the entire settings menu.
Differences between Sizes and Variants
We tested the 55" (OLED55B7A). For the most part, we expect our review to be valid for the 65" (OLED65B7A).
The B7P (OLED55B7P, OLED65B7P) is a warehouse exclusive model in the USA and is also available in Canada but we expect its performance to be identical. One difference is that the B7P can play Dolby Atmos using its own speakers because it has a 2.2 speaker setup, while the B7A can't play Atmos with its own speakers because it only has a 2.0 setup. The B7A can still passthrough Atmos to an external receiver though.
The B7V (OLED55B7V, OLED65B7V) is a European variant which sports a different stand, similar to what is found on the LG SJ8500. We also expect this to offer the same performance as the German B7T (OLED55B7T, OLED65B7T).
If someone comes across a different type of panel or if their LG OLED 55B7A (55OLEDB7) or 65B7A (65OLEDB7) doesn't correspond to our review, let us know and we will update the review. Note that some tests such as the gray uniformity may vary between individual units.
| Size | US Model | Warehouse Model | EU Model |
| 55" | OLED55B7A | OLED55B7P | OLED55B7V |
| 65" | OLED65B7A | OLED65B7P | OLED65B7V |
Compared to other TVs
The LG B7 is a great TV overall and offers a lot of value for money. Since it has the best picture quality while still being reasonably priced, it's a very competitive model. See our recommendations for the best smart TVs and the best 4k TVs.
The performance of the LG B7A and LG C7 is nearly identical. There are no major differences other than the design. The LG C7 and the B7P variant have a 2.2 speaker setup, which can internally decode Dolby Atmos sound. The B7A variant only has a 2.0 speaker setup and cannot decode Dolby Atmos internally, although the C7 and all B7 models can output Atmos to an external receiver.
The LG B8 is somewhat better than the LG B7A. The LG B8 has slightly better motion handling due to the black frame insertion (BFI) feature, which is great if you play video games. Also, the LG B8 performs somewhat better in temporary image retention if you use it as a PC monitor, although this could be due to panel variance. On the other hand, the LG B7A has marginally better input lag in HDR gaming and marginally better viewing angles, although both TVs are very good in that respect.
The LG C8 is somewhat better than the LG B7A. While the overall performance of the two is very similar, the LG C8 has an optional Black Frame Insertion feature that the B7A does not have. This feature helps to improve the perceived clarity of motion on the C8, at the expense of some brightness.
The LG B7A is better than the Sony X900F, unless the possibility of burn-in concerns you. The LG B7A uses an OLED panel, which offers perfect dark room performance and wide viewing angles. The B7A is prone to temporary image retention, and there is the possibility of permanent burn-in. The Sony X900F appears to be immune to burn-in and does not experience any image retention.
The LG B7A is better than the Sony X900E, unless you watch a lot of static content and the possibility of burn-in concerns you. The LG B7A uses an OLED screen, which has the possibility of burn-in, but provides perfect dark room performance and great wide viewing angles. The B7A has lower input lag, great for gaming. The Sony X900E does not experience any temporary image retention, and appears to be immune to the effects of burn-in.
The LG E7P has a very similar performance to the LG B7A. The two TVs score almost the same in most of our tests. The main difference is the presence of a dedicated soundbar found on the E7P to improve sound performance and the temporary image retention, where the E7P is doing better, but this can be attributed to panel variance.
If you watch movies or HDR content in a dark room, then the LG B7A is a better choice, whereas if you extensively use your TV as a PC monitor or watch a lot of news with static banners, go with the Sony X930E. The LG B7A, as an OLED TV, has perfect blacks that you will appreciate in a dark room while watching movies. Also, the LG B7A has a somewhat better response time and a bit better input lag to please those who play video games. Watching sports with a group of friends is better on the LG B7A as it has slightly better gray uniformity and better viewing angles to accommodate those viewing from the side.
If you enjoy watching movies in a dark room, then the LG B7A is a better choice, but if you will be watching a lot of static content like news, then the LG SJ9500 is better. The LG B7A has perfect blacks that improve the picture quality in a dark room. Also, the LG B7A has slightly better viewing angles and somewhat better reflection handling, which is great for wide seating arrangments and rooms with many light sources. On the other hand, the LG SJ9500 has marginally better input lag, which is great for video gaming and does not have the permanent burn-in risk OLED TVs have.
