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A LED TV backlight is a form of illumination used in liquid crystal displays (LCDs). As LCDs do not produce light by themselves—unlike, for example, cathode ray tube (CRT), plasma (PDP) or OLED displays—they need illumination (ambient light or a special light source) to produce a visible image. Backlights illuminate the LCD from the side or back of the display panel, unlike frontlights, which are placed in front of the LCD.
A LED TV backlight for Lg is a liquid-crystal display that uses LEDs for backlighting instead of traditional cold cathode fluorescent (CCFL) backlighting. LED-backlit displays use the same TFT LCD (thin-film-transistor liquid-crystal display) technologies as CCFL-backlit LCDs, but offer a variety of advantages over them. While not an LED display, a television using such a combination of an LED backlight with an LCD panel is advertised as an LED TV by some manufacturers and suppliers.
LED TV backlight for Samsung features igh brightness up to 700 nits. What's more, the backlight has long operating life, typically lasting over 100,000 hours. It is more energy saving with wide scope of application. And also, it's more environmentally friendly and easy to install.
When compared with earlier CCFL backlights, using LED TV backlight for Sony offers wider color gamut (with RGB-LED or QDEF) and dimming range and greater contrast ratio. What's more, the backlight is very slim (some screens are less than 0.5 inches (13 mm) thin in edge-lit panels). And also, it's significantly lighter and cooler, as much as half the total chassis and system weight of a comparable CCFL. Typically, it features 20–30% lower power consumption and longer lifespan, which means that the backlight is more reliable.
LED TV backlight for Toshiba is most commonly used in small, inexpensive LCD panels. White LED backlighting is becoming dominant. ELP backlighting is often used for larger displays or when even backlighting is important; it can also be either colored or white. An ELP must be driven by relatively high voltage AC power, which is provided by an inverter circuit. CCFL backlights are used on larger displays such as computer monitors, and are typically white in color; these also require the use of an inverter and diffuser. Incandescent backlighting was used by early LCD panels to achieve high brightness, but the limited life and excess heat produced by incandescent bulbs were severe limitations. The heat generated by incandescent bulbs typically requires the bulbs to be mounted away from the display to prevent damage.
LED TV backlight for Panasonic comes in two varieties: white LED backlights and RGB LED backlights. White LEDs are used most often in notebooks and desktop screens, and make up virtually all mobile LCD screens. A white LED is typically a blue LED with broad spectrum yellow phosphor to result in the emission of white light. However, because the spectral curve peaks at yellow, it is a poor match to the transmission peaks of the red and green color filters of the LCD. This causes the red and green primaries to shift toward yellow, reducing the color gamut of the display.
LED TV backlight for Philips can deliver an enormous color gamut to screens. When using three separate LEDs (additive color) the backlight can produce a color spectrum that closely matches the color filters in the LCD pixels themselves. In this way, the filter passband can be narrowed so that each color component lets only a very narrow band of spectrum through the LCD. This improves the efficiency of the display since less light is blocked when white is displayed. Also, the actual red, green, and blue points can be moved farther out so that the display is capable of reproducing more vivid colors.
LED TV backlight for Sharp will create a soft, adjustable backlight behind your television, enhancing the ambiance of your home entertainment and reducing eye strain. At their most thrilling, the best LED lights for your TV will connect and sync in real-time with the colors and sounds you're streaming.
LED TV backlight for Vestel are used in small displays to increase readability in low light conditions such as in wristwatches, and are used in smart phones, computer displays and LCD televisions to produce light in a manner similar to a CRT display. A review of some early backlighting schemes for LCDs is given in a report Engineering and Technology History by Peter J. Wild.
LED TV backlight for Tcl is often dynamically controlled using the video information (dynamic backlight control or dynamic "local dimming" LED backlight, also marketed as HDR. Using PWM (pulse-width modulation, a technology where the intensity of the LEDs are kept constant, but the brightness adjustment is achieved by varying a time interval of flashing these constant light intensity light sources), the backlight is dimmed to the brightest color that appears on the screen while simultaneously boosting the LCD contrast to the maximum achievable levels.