Assembly of a display device and an illumination system
First Claim
1. An assembly comprising a display device provided with a pattern of pixels (3) driven by a control circuit (8), and an illumination system for illuminating the display device, said illumination system comprising a light-emitting panel (11) and at least one light source (16, 16′
- , 16″
, . . . ), said light source (16, 16′
, 16″
, . . . ) being associated with the light-emitting panel (11), characterized in that the light source comprises at least two light-emitting diodes (16, 16′
, 16″
, . . . ) having different light-emission wavelengths, and the control circuit (8) also drives the luminous fluxes of the light-emitting diodes (16, 16′
, 16″
, . . . ) in dependence upon an image to be displayed by the display device.
2 Assignments
0 Petitions
Accused Products
Abstract
The system comprises a display device with a pattern of pixels (3) controlled by a control circuit (8) and a backlight system for illuminating the display device, which backlight system comprises a light-emitting panel and a light source (16, 16′, 16″, . . . ) associated with the light-emitting panel. The light source comprises a plurality of light-emitting diodes (LEDs) of at least two different colors. The control circuit (8) also controls the luminous flux of the LEDs. Preferably, the intensity of the light emitted by the LEDs (16, 16′, 16″) varies with the light level of the image to be displayed by the display device. Preferably, the intensity of the light emitted by the backlight system can be controlled on a frame-to-frame basis and, preferably, also for each color. Preferably, the LEDs comprise a plurality of red, green, blue (and amber) LEDs, each, preferably, having a luminous flux of at least 5 lumen. The color point of an image to be displayed on the display screen of the display device is set by the backlight system, enabling an optimum contrast to be obtained for the image to be displayed by the display device.
314 Citations
9 Claims
-
1. An assembly comprising
a display device provided with a pattern of pixels (3) driven by a control circuit (8), and an illumination system for illuminating the display device, said illumination system comprising a light-emitting panel (11) and at least one light source (16, 16′ - , 16″
, . . . ), said light source (16, 16′
, 16″
, . . . ) being associated with the light-emitting panel (11), characterized in thatthe light source comprises at least two light-emitting diodes (16, 16′
, 16″
, . . . ) having different light-emission wavelengths, andthe control circuit (8) also drives the luminous fluxes of the light-emitting diodes (16, 16′
, 16″
, . . . ) in dependence upon an image to be displayed by the display device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
- , 16″
Specification