LG 55EM9600 OLED TV - Capital Letter TV

    Good day to all! Today we want to tell you about an unusual TV, which was recently presented at our presentation . It will be about OLED TV, which can rightfully be called one of a kind. Many manufacturers fought for the title of the first company to offer OLED TVs, available not only to owners of personal oil wells, but it was we who were able to do this first.

    Of course, the efforts of other vendors also deserve praise: they did not stand still and developed related industries, and this, in any case, sooner or later will lead to an improvement in the overall quality of the technology, but we want innovation and amazing picture quality here and now, so ... You are welcome under cat, to find out what and how in the only model of the OLED TV that has left the showrooms and will appear on store shelves in a month or two.

    1. Appearance


    The appearance of the TV, perhaps, can be characterized by the words "nothing more." The finest frame around the screen, a simple and neat stand that stores all the connectors and electronics inside, and that's all.



    Few? And we said nothing more. A TV, you know, is needed for watching videos, and not for collecting fingerprints on the glossy surfaces of edging plastic. :)



    2. Characteristics


    Display:
    • Diagonal - 55 inches;
    • Resolution - 1920x1080p;
    • Response Speed ​​(GtG) - 1ms;
    • The lack of a backlight system (each pixel in the matrix is ​​lit).

    Sound:
    • Built-in stereo speakers
    • Ability to connect an external audio system via digital output

    Ports and Interfaces:
    • 4x HDMI 1.3
    • 3x USB 2.0
    • 1x Ethernet
    • 1x 3.5mm MiniJack
    • 1x VGA (D-sub)
    • 1x Component (YPbPr / YCbCr) input

    Technology:
    • Support for LG Smart TV 2013;
    • Support for LG Cinema 3D;


    3. Technical problems and solutions


    There were many difficult moments. OLED-matrixes have a lot of advantages (brightness, contrast), however, the production of an OLED-display of such a diagonal requires a smooth and predictable production, since marriage in a product of this level is unacceptable.



    OLED screens have long been used in telephony, in an industry where maintaining a good brightness / power ratio is especially important. Some problems (such as the MTBF of the blue LEDs and problems with obtaining a high resolution display) were partially or completely solved in mobile developments), however, the TV is not a smartphone, and the characteristics of the panels that satisfy the requirements of the communicator are insufficient for the production of displays to be used on a 55 "TV.

    The first problem is the brightness of the display. If there is no particular problem with the phones, since they are used at a distance of up to 100 centimeters, the television screen, despite the highest contrast, may appear dull or dark. There are two ways to solve this - to reduce external lighting, or to increase the brightness of the display. Since the “light trap” cannot be done yet, and not everyone will agree to pitch darkness in the room, you have to raise the brightness of the display. This directly leads to an increase in both power consumption and heat generated. It is with the matrix overheating problem that many companies have tried to develop OLED TVs. We approached its solution comprehensively.

    The first thing that was asked was how to improve the brightness of the picture without increasing the power of the LEDs in the matrix by a significant amount. A simple and elegant solution was found - if 3 LEDs are used to get any shade from bright white to black, then you can use an additional subpixel of white color and reduce the load on the remaining color subpixels. This technology is called WRGB, and it has already been used previously in mobile phones.

    In this picture you can see that the image is formed from individual luminous dots.

    The industry knows how to produce bright white LEDs, and the presence of an additional point that does not carry a color load (that is, having no ⅓ (due to a squeezed color spectrum), and the full light flux at the same power consumption) allows less “shine” with color subpixels when you want to display a light shade or just a white dot.

    Zoom! Enhance!

    In addition, color rendering has improved in typically weak segments of OLED displays - in dark, gray and almost white tones, details are no longer lost, and the contrast remains the same high.


    No! Just keep zooming!

    The second improvement was the answer to the question: "how to increase heat dissipation without introducing active cooling." Agree, the cooler in the TV is too much. The solution to improve the heat dissipation from the OLED panel was the case. Thin, neat, simple in appearance, it is one large radiator for a matrix of 8,294,400 microscopic LEDs.

    All electronics and connectors are located in the stand of the OLED TV, allowing you to use almost the entire surface of the 55 "panel as a heat dissipator.

    The developers did not forget about 3D content. The display matrix is ​​coated with a special polarizing material that separates even lines from odd lines and gives the light emitted by them a corresponding polarization. If you look at such a screen without the corresponding glasses, screening out part of the rays for the left / right eye, then you see a normal image (in the case of 3D viewing, a double image). Glasses, sifting out the “wrong” lines, allow the eye to show only the right part of the picture. A simple and effective solution that does not require a separate power supply (or battery) for glasses, double the frame rate, does not cause the LCD shutters to flicker or the strobe effect during desync and practically does not depend on the angle at which you look at the display.

    Well, we won’t tell you fairy tales about the amazing brightness and contrast: here is a video from the Russian presentation of this TV, see for yourself:



    Black means black, white means white, and color is color, and as far as the vibrant juiciness of the picture is concerned, not a single IPS TV can compete with the OLED panel so far.

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