The LED backlight for TVs that change with the picture has undergone a number of changes in recent years.
How the LED Backlight feature for TV works is a better-than-average option at a lower-than-average price.
There's a bit more to an LCD TV's glowing panel than you'd expect.
LCD panels offer the shape and color components of an image, but don't actually produce their own light. And without light to produce color, we see and project images onto all of you.
Behind the LCD panel is the backlight, and between the backlight and the LCD panel are usually multiple layers of polarized filters, backlight scattering, and other optical layers designed to convert the collection of components of this technology into a sharper viewable image.
The details will vary from one manufacturer or fashion to the next, but the basics on which the technology is based remain the same.
You will have an LCD panel to provide a lot of image content, and a backlight behind it to provide light that makes the LCD panel visible and vibrant colors.
LED backlight for TV that changes according to the picture
Today's TVs use a lot of backlighting, which we'll cover below, but the biggest change is the introduction of separate light zones. Switching across the screen, the TV's LED backlights can be handled individually, meaning that they can be turned on or off, dimmed or brightened as needed to provide a lighter or darker portion of the TV picture.
You may not know much about the local dimming innovation, but you may have heard of the features it enables: High dynamic range or HDR. This is one of the best features on TV today.
With local dimming zones that allow variable brightness to different parts of the screen, the new media includes additional metadata, external video, and simple sound. This data describes the brightness and background scheme for a given scene or content frame.
Although the metadata may be under the name of a different format, HDR10 or Dolby Vision, the point is the same explaining how downlighting should behave to produce a richer image.
There are various formats with varying degrees of detail, but ultimately modern media takes into account the results of these additional brightness controls, as does multi-channel color and sound.
But there is a catch. Not all forms of backlight offer the same level of control. As a result, not all TVs have the same level of capability, even though they support the same HDR format. And it all depends on the type of backlight used.
Thus a brief explanation of LED backlight for TV, hopefully it can help.