However, not all televisions are the same.
In others, there are problems with all of the above.
If you have questions, you’re able to also ask me atanatoliy@tab-tv.com.
Valeriy Artamonov
I replied to this person by email, addressing specifically this television.
But lets talk in general: why do some LED televisions have poor black color?
Yes, you heard right.
Illustration via:DigitalView.com
What is sold as an LED TV is an LED-lit LCD TV (or TV with LED backlighting).
In true LED TVs, the LEDs should illuminate themselves, creating light and, accordingly, an image.
For example, as is done by OLED TVs, where organic LEDs create light without backlighting.
What is sold as an LED TV is an LCD TV with LED backlighting.
Then, this light passes through the LCD module (Liquid Crystals) and color filters.
Color filters are what we usually call pixels.
Each of them consists of three subpixels.
However, there are also other placements.
For example, some cheap TVs may have white pixels instead of three RGB subpixels.
To create different colors, blue, green, and red must be mixed in certain proportions.
LCD (or LED, as they are called) TVs have an LCD module for this.
If some subpixels are opened more, the TV can create other colors.
But why do we see not black but dark blue or gray?
Its all because some light from other pixels seeps into the closed pixels, creating a glow effect.
The number of zones can vary depending on the specific TV model.
Now, most TVs have local dimming zones, which makes them significantly more expensive.
There are several types:
Edge-LED (ELED).
This ranges from a single row of LEDs to two rows or other arrangements.
Layers called light diffusers are used to spread the light across the entire surface of the display.
EdgeLED is the cheapest key in of backlighting, usually used in budget LCD televisions.
DirectLED (DLED).
The backlight LEDs are directly behind the LCD module (or other layers, if present).
They also use diffusion layers, but only to make the image uniform, without the grid effect.
In such televisions, local dimming performs quite well.
However, even the best local dimming will be noticeable, especially at the junction of zones.
There, you might notice halos, light bleeding, or contrast issues.
Are there LED TVs with a good black color?
But from my personal experience, I can say that the perfect black color is practically indistinguishable to consumers.
