Local Dimming LED

The coolest demo I saw at CEDIA 2007 was a demo I saw at CEDIA 2006. The original demo was at the Planar suite. Dolby now owns the company that was working with Planar, BrightSide Technologies, and the technology shown in these demos has a name—Dolby Vision. The short version is this: Using LEDs, you can dim specific areas of the backlight to go along with what is happening with the video. In other words, you can dim certain areas of the screen, while keeping other areas bright. In the simplest form, picture a split screen with black on one side and white on the other. Local dimming would allow the LEDs on the black side to be off and the LEDs on the white side to be lit. The result is a fantastic, legitimate contrast ratio, along with possible energy savings and a host of other potential benefits. But first, we have to understand the problem before we can talk about this solution.