LG 65B7V: an Oled 65 "TV with excellent picture quality

Presentation

Updated 19/03/2018 at 15:52

This test, originally published on February 21, 2018, has been completed and updated. The Cobra Parmentier store located in the 11th arrondissement of Paris has once again opened its doors for us to test a television there. This is the LG 65B7V model, the cousin (not to say the false twin) of the LG Oled 55C7V already in the laboratory. We will therefore rely in part on its complete test carried out last year, as well as on measurements redone on site.

Like all Oled TVs of 2017, the LG 65B7V uses a 10-bit Oled panel displaying an Ultra HD resolution of 3 840 x 2 160 px. It uses the same electronics and the same LG MP16 + processor as the other LG Oled models (C7V, E7V, G7V and W7V). On paper, this LG Oled 65B7V must therefore display an image identical to that observed on the LG 55C7V, LG 65E7V and LG Oled 65W7.

This LG OLED65B7V TV is sold for around € 3,500. It is available in a 55-inch version (LG OLED55B7V) at a price of € 2,000. When launched last year, the 55 and 65 inch versions were sold for € 3,000 and € 5,000 respectively.

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Image quality

As mentioned in the 55C7V test, the sub-pixels of the LG 65B7V are identical to those of the LG 55C7V and LG Signature 65W7, and common to all the Oled models that we tested this year (Sony Bravia KD-65A1, Panasonic TX- 65EZ950 and Panasonic TX-65EZ1000). Each pixel remains composed of four sub-pixels (one green, one red, one blue and one white), the white and blue sub-pixels being larger in order to improve the maximum brightness of the screen.

The semi-gloss panel always has a fairly effective anti-reflective coating which dilutes the light reflections; as on the 55C7V, they are now neutral and no longer appear purple (unlike what we observed on the 2016 models, including the 55B6V).

With the exception of bright green, all the colors tested display a delta E of less than 3 and can therefore be considered as faithful. The average delta E here stands at 1.9, which is excellent and well below 3, a threshold below which the human eye no longer perceives the difference between the colors displayed on the screen and the colors requested.

As on the 55C7V, the gamma curve of the 65B7V always varies slightly on the grays from 60%, but remains correct. The gamma average is based on the reference value (2.2). Like other 2017 models of the brand, this TV automatically detects the appropriate gamma, which is much simpler for the user, and therefore switches gamma 2.2 by itself, ideal for HD / Full HD, at gamma 2.4 (ST / 2084), which is the standard for Ultra HD Blu-ray.

The average color temperature, at 6,410 K, is very close to the 6,500 K reference, and the curve is perfectly stable over the entire spectrum.

The Oled technology - thanks to which pixels can be individually extinguished - ensures absolute black and contrast considered to be infinite. With a white calibrated at 150 cd / m², the blacks are at 0 cd / m² (our probe cannot measure a black below 0.0049 cd / m²). The contrast is simply perfect and allows you to enjoy all the nuances, even in complete darkness. The measured light peaks are quite close to those we had measured on the W7 and the C7, which confirms the use of the same type of panel. On a target containing 1% white, we measured a light peak at 735 cd / m² in HDR Cinema mode.

LG's Ultra Resolution scaling engine is the same as the 55C7V and has yet to evolve. As we said about the 55C7V: "It can still display Full HD content on this Ultra HD panel without distorting the original source too much. The processing is quite good. It does not generate artifacts and does not smooth too The native 4K version still has a lot more detail, but the scaling is nicely done. "LG should do better this year with the arrival of the new α9 processors.

For the compensation engine, we also refer you to the 55C7V test. To summarize, the compensation engine has not changed since 2016 and LG has been left behind by Panasonic and Philips who offer a very powerful engine on the 65EZ950 and 55POS9002.

The delay in the display is excellent, as on the other Oled LG of 2017. In game mode, we again measured the input lag at only 21 ms; it is identical in Full HD and in 4K HDR game (from a PS4 Pro or an Xbox One S, for example). As we said, at 60 Hz, this value represents less than two images of delay compared to the source. The difference between the action performed with the joystick and its repercussion on the screen is almost imperceptible. In cinema mode, the input lag here rises to 100 ms, but this has no impact on the viewing of a film.

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Clouding

Each pixel being managed individually, Oled television requires, there is no clouding. This model is also free of banding effects (horizontal or vertical bands). The homogeneity of the brightness on the screen is good (average deviation measured at only 6%). This excellent result is again explained by the use of Oled technology.

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3D

No 2017 Oled TV is compatible with 3D.

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Ergonomics

The LG Oled 65B7V television sets itself apart from the C7V by its foot in an arc, but the rest is identical. We find a very thin screen frame.

As with the C7V, the LG logo has disappeared from the front of the TV and is only found on the right side of the stand. When the TV is hung on the wall, no mention of LG is apparent. The depth of the foot is 22.5 cm. The TV, for its part, is only 5 cm thick at the bottom and a few millimeters at the top.

This television offers four HDMI 2.0 inputs, three USB ports including a USB 3.0, an Ethernet port, an optical digital audio output, a headphone output, a PCMCIA (CI + Common Interface) port, a rake antenna connector and a satellite. It has a DVB-T / T2 tuner and an integrated DVB-S / S2 and DVB-C demodulator. It also has 802.11a / b / g / n Wi-Fi and Bluetooth 4.0 for connection with a wireless audio device (headphones or speaker).

Here again, WebOS 3.5 is at work to bring the TV to life. As on the 55C7V, the interface is still as pleasant to use and the high-performance multimedia player manages most of the recent containers and codecs.

Finally, the remote control, identical to that of the 55C7V, has an excellent grip and a built-in microphone for voice searches. The keys are nice, although not backlit. The most important absence is probably that of the multimedia keys.

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Audio

The audio system consists of two speakers and two subwoofers for a total power of 40 W. In the end, the audio system sounds pretty good. For the frequency response curve, we refer you once again to the test of the 55C7V, which integrates the same audio system. In all cases, to enjoy a better immersion, it is better to invest in a sound bar or a home cinema kit.

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Consumption

With a white calibrated at 150 cd / m², we noted a consumption of 115 W, that is a relative consumption of 99 W / m². Consumption is identical to that of the Signature 65G6V (99 W / m²) and lower than that of the C7V (116 W / m²). The most economical televisions on the market consume less than 75 W / m² - we think in particular of the Sony KD-65XE8505 (56 W / m²) or more recently the Sony KD-65XF9005 (71 W / m²). In standby, even with the "Instant On" mode activated (in order to find the screen in 5 s as we left it), the TV consumes less than 1 W.

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Conclusion

The LG 65B7V TV is a 65-inch variant of the LG 55C7V that we tested. Instead of a rectangular base, this model has a base in an arc. For the rest, the image quality is identical to that of the C7V. The 65B7V thus offers the same image as the high-end LG Signature 65W7 TV for a much lower price. Compared to last year's model (the LG 55C6V), it loses 3D compatibility and the curved panel, but gains a greater brightness peak, more content display delay and some interesting features (including the Quick Access). This television also presents an excellent quality / price ratio. It is still expensive, but it is one of the most affordable Oled TVs.

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