Video and content controlled backlight
View Patent ↗A display device includes a display panel; and a backlight panel provided below the display panel and defining a plurality of regions. A first array of light emitting diodes (LEDs) is provided along a first direction, each LED of the first array being coupled to a first line. A driver is coupled to the first line to drive the LEDs coupled to the first line. A second array of LEDs is provided along a second direction, each LEDs of the second array being coupled to a second line. A lighting condition of the regions defined by the backlight panel is controlled by turning on or off the LEDs.
1. A display comprising:
a display panel;
a backlight panel provided behind the display panel, the backlight panel having a plurality of regions each of the same size;
each of the plurality of regions having a set of light emitting diodes (LEDs) chosen from a plurality of colors of LEDs, and each one of the LEDs in each region being coupled to a current line and a voltage line;
wherein for each of the plurality of regions the set of LEDs in that region depends on where that region is located on the backlight panel to thereby provide a backlight panel in which at least some regions of the plurality of regions having a different set of colors of LEDs than other regions of the plurality of regions, thereby providing a backlight panel wherein the LEDs in some regions of the plurality of regions are different than the LEDs in other regions of the plurality of regions; and
wherein the color of light emitted from each region of the plurality of regions is controlled by adjusting the current and voltage to the LEDs in that region.
2. The display of claim 1 wherein each of the plurality of regions comprises a pixel on the display.
3. The display of claim 2 wherein each of the pixels includes a red, a green and a blue LED.
4. The display of claim 3 wherein at least some of the pixels include a red, a green, a blue and another blue LED.
5. The display of claim 4 wherein at least some of the pixels include a red, a green, a blue, a yellow and a cyan LED.
6. The display of claim 1 wherein the plurality of regions include first regions at a periphery of the backlight panel and second regions proximate the center of the backlight panel and wherein the first regions and the second regions have different colors of LEDs from each other.
7. The display of claim 6 wherein each of the second regions have more LEDs than each of the first regions.
8. The display of claim 1 further comprising a light guide to spread the light emitted by the LEDs associated with some of the regions.
9. The display of claim 8 wherein the light guide includes a reflective surface opposite the side of the LEDs.
10. A backlight panel for a display comprising:
a plurality of first regions, each of a same first size, each first region having light emitting diodes (LEDs) on the backlight panel, each of the plurality of first regions having a first number of LEDs;
a plurality of second regions, each second region also being of the same first size, each of the plurality of second regions having LEDs on the backlight panel, each of the plurality of second regions having a second number of LEDs, the second number of LEDs being larger than the first number of LEDs;
each of the LEDs on the backlight panel being connected a current line and a voltage line; and
wherein the color of the light emitted by each of the plurality of first regions and each of the plurality of second regions is controlled by adjusting the current in each current line and the voltage in each voltage line.
11. The backlight panel of claim 10 wherein each of the first regions include a red, a green, and a blue LED, and each of second regions include a red, a green, a blue, and at least one more LED in addition to the red, the green and the blue LEDs.