iTechGuides is reader-supported. When you buy through links on our site, we may earn an affiliate commission. As an Amazon Associate I earn from qualifying purchases. Learn more
An LED TV is usually an LCD television illuminated by light-emitting diodes (LEDs). The LEDs provide the light; the LCD panel controls how much of it passes through each pixel area, and color filters create the colors you see. The label does not mean every pixel is a tiny, self-lit RGB LED.
What is an LED TV?
In everyday television terminology, “LED TV” means an LED-backlit LCD TV. The display combines two jobs: a backlight supplies illumination, and the liquid-crystal display (LCD) layer modulates that light to form the image. Color filters give the image its colors. Samsung’s overview describes the distinction between LED-backlit LCD, OLED and QLED in its TV technology guide.
So LED and LCD are not mutually exclusive categories in this common usage: an LED TV is a type of LCD TV. The term distinguishes its backlight from older LCD sets that used other light sources; it does not describe individually illuminated picture pixels.
Free tools Windows power users keep installed
One-click scans. No signup required.
What is the backlight on a TV?
The backlight is the light source behind or beside an LCD panel. Because an LCD panel shapes light rather than producing it, the backlight illuminates the image. Its placement and whether it can be dimmed in sections affect how the television handles bright and dark areas. Sharp’s backlighting overview explains the main arrangements.
#1 Best Overall
- Bright, clear picture: Bring entertainment to life on our 40" flat screen TV with bright 1080p Full HD—perfect for bedrooms, kitchens, and beyond. Roku Smart Picture cleans up incoming TV signals, optimizes them, and chooses the right picture mode.
- Seamless streaming: With fast Wi-Fi and apps that launch in a snap, Roku Select Series TVs get you to your entertainment quickly. You get excellent picture quality, clear sound, automatic updates, and more. It’s simple to use. Hard to outgrow.
- TV, simplified: With setup that only takes minutes, a simple-to-navigate Home Screen, and an uncluttered remote control that does all you need—Roku makes it easier to watch the TV you love.
- A world of free entertainment: Enjoy a huge selection of free live TV, news, sports, movies, shows, and much more—all just a click away.
- More streaming, less searching: With personalized picks right on your Home Screen, quick access to the sports and entertainment you watch most, and fast and easy search in one place—the days of endless scrolling are over.
Edge-lit
Edge-lit TVs place LEDs along one or more edges of the screen. A light guide spreads their illumination across the panel. This arrangement can support a thin screen, but the label alone does not tell you how evenly a particular model lights the image.
Direct-lit
Direct-lit sets place LEDs behind the panel. The label describes their position, but it does not by itself establish whether the LEDs are independently controlled in zones or how many zones a model has.
Full-array and local dimming
A full-array backlight uses LEDs distributed behind the screen. In a local-dimming system, the TV controls groups of those LEDs in zones: it can reduce light in a darker area while keeping a brighter area illuminated. This can improve perceived black levels and make highlights stand out against dark scenes.
Rank #2
- 4k Ultra HD (2160p resolution): Enjoy breathtaking HDR10 4K movies and TV shows at 4 times the resolution of Full HD, and upscale your current content to Ultra HD-level picture quality.
- High Dynamic Range: Provides a wide range of color details and sharper contrast, from the brightest whites to the deepest blacks.
- All-in-one: Get right to your good stuff. With Fire TV, you can enjoy a world of entertainment from apps like Prime Video, Netflix, Disney+, Hulu, and HBO Max. Plus, stream for free with Fire TV Channels, Pluto TV, Tubi, and more. Access over 1.8 million movies and TV episodes. Subscriptions may be required. Feature and content availability may vary.
- Smart Home: Your smart home hub. Pair Fire TV with compatible smart home devices to see live camera feeds, use AirPlay, control your lighting and thermostat, and more.
- Free Content: Stream for free. Access over 1 million free movies and TV episodes from popular ad-supported streaming apps like Fire TV Channels, Tubi, and Pluto TV. Subscriptions may be required. Feature and content availability may vary.
A zone covers multiple image pixels, however, so it cannot always keep a small bright object perfectly separate from its dark surroundings. Light around subtitles or stars on a dark background may appear as a halo, known as blooming. How visible this is depends on the television’s backlight design, dimming behavior, image processing and the content being watched. Sony’s backlighting systems overview distinguishes common system types; a broad marketing label does not establish a model’s zone count, uniformity or image quality.
How LED LCD, OLED and QLED differ
The key distinction is how each display creates or controls light. OLED pixels emit their own light, so a pixel can turn off without relying on a separate backlight. An LED LCD instead uses a backlight and an LCD layer to shape its light. Samsung describes QLED as an LED-backlit LCD with an additional quantum-dot layer; QLED is therefore not another name for OLED.
| Type | How it makes the image | What the distinction means |
|---|---|---|
| LED LCD (often called LED TV) | LED backlight illuminates an LCD panel; color filters produce color. | The backlight may be edge-lit, direct-lit or full-array, with local dimming available on some models. |
| OLED | Pixels emit their own light and can switch off individually. | No separate backlight is needed. |
| QLED, as described by Samsung | LED-backlit LCD with a quantum-dot layer. | It remains an LCD/backlight design, not a self-emissive OLED display. |
These structural differences do not establish that one type is best for every room or viewer. Performance varies by model, content and settings; compare the specific televisions you are considering rather than relying on a technology name or a manufacturer’s general claims.
Rank #3
- 1080p Resolution: Watch movies and TV shows in high-definition picture quality.
- LED-backlit LCD screen: With reliable and long-lasting LED lighting, this LCD screen delivers a wide range of colors and contrast for a memorable viewing experience.
- Watch what you want: Stream over 1.5 million movies and TV episodes. Watch favorites with subscriptions to Netflix, Prime Video, Disney+, and more. Subscription fees may apply.
- All your entertainment in one place: Watch live and free TV, play video games, and stream music.
- Smart and always getting smarter: Fire TV adds new Alexa skills, features, smart home capabilities, and voice functionality all the time.
What to compare when choosing an LED TV
Start with the conditions in which you will watch and the features you will actually use. ENERGY STAR’s television guide lists practical factors such as resolution, HDR, refresh rate, smart-TV support, viewing distance and HDMI inputs. The U.S. Department of Energy’s television purchasing guidance also discusses energy use and features such as local dimming and automatic brightness control.
The Tool Desk
Outbyte Driver Updater FREEFix the driver behind crashes, sound loss and screen glitchesFind Drivers →Outbyte PC Repair FREERepair Windows errors before they cause bigger problemsFix Now →- Room brightness and viewing habits: Consider how much brightness you need, how often the room is bright, and whether automatic brightness control suits your use.
- Backlight and dark scenes: Check whether the exact model offers local dimming and look for model-level information on its implementation. If you often watch dark films with subtitles, blooming may matter to you.
- Screen size and resolution: Choose a size and resolution that suit your viewing distance. UHD/4K is a feature to compare, not a requirement for every viewer.
- HDR, refresh rate and smart features: Verify the formats, refresh rate and interface support listed for the particular model against the content and devices you use.
- Connections: Count the HDMI inputs needed for your game consoles, streaming devices, sound system and other equipment before buying.
- Energy use: Compare the model-specific rated consumption or certification, and factor in your viewing hours, picture settings, standby use and local electricity price.
Energy use and what a published cost example can tell you
ENERGY STAR certification and energy ratings can help compare televisions, but they are not a prediction of every household’s bill. The Department of Energy says LCD TVs using LED technology tend to be among the more energy-efficient TV types in its guidance. Actual consumption depends on screen size, model, settings, viewing time, standby behavior and electricity price. The default picture setting is used to earn the ENERGY STAR label; switching to a brighter preset such as vivid can affect energy use.
For scale, a U.S. Department of Energy Federal Energy Management Program illustration updated in December 2024 compared a 54.5-inch ENERGY STAR example using 168 kWh annually with a less-efficient example using 235 kWh. Under the agency’s assumptions—1,825 active hours and 6,935 standby hours per year, a five-year life, and electricity at 11 cents per kWh based on federal facility prices as of July 2024—the ENERGY STAR model could justify a purchase premium of no more than $31 in 2023 dollars. This is a dated U.S. scenario, not a universal savings estimate or a current offer.
Bottom line for comparing LED TVs
“LED TV” usually means an LCD screen illuminated by LEDs. Backlight placement and local dimming help explain how an individual model may handle dark scenes, while OLED and QLED describe different display structures. For a useful comparison, check the exact model’s backlight features, viewing needs, specifications, connections and energy information rather than treating its technology label as a complete picture.
Quick Recap
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
