2160 LEDs and IPS technology

Because this model uses the latest technology LED available in high end class products, expectations for this LG TV are very big. But we must see if the technology is used in a correct manner in the 47LEX8 model launched by LG.


It’s a certain thing that the LED backlight technology is beginning to spread into almost all the newly launched televisions. It’s a good thing, because they consume less energy and are thinner. Also, displays made with this technology are also expected to offer a contrast ratio higher and deeper blacks.
Comparing the LED technology to the “Edge LED” TVs, the former uses LEDs placed only on the side of the screen. It appears that full LED displays may apply a local dynamic backlight (usually called local dimming) for compensation.

This compensation of light is made just to reduce – in real-time – the light intensity of LEDs located in dark areas of the image. This is the secret if you need to obtain very deep blacks in dark scenes on the display of a TV. And if you use more LEDs for this thing and add local dynamic backlight, results are impressive and very accurate. The LG 47LEX8 uses, for its screen, about 2,160 LEDs and the IPS technology (In Plane Switching). With this model, the Korean manufacturer LG pushed the available technology at the maximum. Let’s see the test and the entire TV review.


LG-47LEX8The first thing that is visible on the 47LEX8 model is its impressive design. It has an equally impressive finesse (just 9 mm !), because all the electronics were put in a case that serves as base. At first view, this base could look a little bit large and somehow heavy, but the user can detach and move it away from the screen if he wants his television to sit on a wall or on another fixed support. All the materials used for this luxury TV are made from noble metal (aluminum). The finish of the design is very good and the edges of the display only measure 1.2 cm ub thickness. This TV is really breathtaking !

Good image quality

We tested this model and the results revealed that color fidelity was very correct in standard mode and excellent in movie mode. This is a constant value for a lot of modern televisions that we tested for our reviews. For almost all of these devices, the standard mode forces blue for vivid and flattering, while the Cinema Mode reduces brightness and balances the three primary colors, with a very pleasant color fidelity. Comparing these models to the LG 47LEX8, the latter does a very good job, with an impressive quality of the image and stunning contrast ratio.

For our tests we used a technique specially developed to check the black / white levels and the speed necessary for this job. This is a very severe test for any TV, but is effective because it shows the limits of local dimming. LEDs get lit behind white areas contaminate dark areas closest to the white points. However, blacks weren’t perfect in our tests, but they were better than on a lot of TVs tested in the same manner. In video mode transitions are often more progressive with the light and the effect of glowing is much weaker (almost not visible in fact). The contrast ratio perceived by the eye is almost perfect. Anyway, we can see that the rest of the colors are very vibrant. Technically speaking, the best solution is to have an LED for each pixel to obtain a perfect local dynamic contrast. Actual technology is not able to do this, but the 47LEX8 uses 2160 LEDs for the best results.

Weak view angle for the screen

In our tests, the display delivered a maximum brightness of about 210 cd / m2. The results showed that we had to look at the TV in a little light if we wanted to see images in the best of conditions. A pleasant surprise is that the model from LG called the 47LEX8 consumes little energy for its size. In fact, the real values of energy consuming are about 95 W in operation and less than 0.1 W in standby mode. A con for this TV is the horizontal viewing angles of the IPS. In our tests, visibility was up to the 58 ° from the right / left direction. This is a medium value for the actual LCD TVs, but we expect more from the 47LEX8. Seeing that it’s a high-end product and all that.

Review conclusion

After this test we can say that we have here an interesting TV that innovates by combining IPS panel and LED backlight. Other features included in the default configuration are a good way to make this model a real success for LG. The quality of the provided image is excellent, with great contrast. For this price (about 5000 euros) we expected an image a little brighter. If you aren’t satisfied with that, for the same price you can choose a larger plasma TV upscale. Advantages of plasma technology are better 3D and better results with wider viewing angles.

Technical specifications

Technology LCD LED
3D display Yes
Number of colors 16.7 million
Diagonal Screen Size (cm) 119
Nominal resolution 1920 x 1080 pixels
Resolution Full HD
Image size 16:09
Response Time 2 ms
HDD recording Yes (external disk)
V viewing angle (°) 178
Viewing angle H (°) 178
Max dynamic contrast (1) 10000000
Image frequency 400 Hz
TV Tuner Analog + HDTV + Freeview SD
Posted In TV - By Catalin Nichita

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