Abstract: Backlight systems for display screens include multiple arrays of multiple different color picture elements and multiple arrays of LED devices that are configured to radiate light of multiple colors in a light path that impinges on the display screen, to provide backlighting on the display screen. More arrays of different color LED devices than arrays of different color picture elements are provided. For example, red, green and blue color picture elements may be provided, whereas red, green, blue and cyanine and/or amber backlighting LED devices may be provided.

Abstract: A display panel for a flat panel display includes an array of LCD devices and an array of LED devices that are configured to radiate light in a light path that impinges on the array of LCD devices, to provide backlighting on the array of LCD devices. A solid colloidal dispersion of particles of a first material having a first index of refraction dispersed in a second material having a second index of refraction, such as a solid foam structure, is provided in the light path to reduce spatial non-uniformity of the backlighting.

Abstract: This invention relates to a method and apparatus for the reduction of electromagnetic radiation from display screens. The display screen is substantially encased within a conductive shield formed by the housing around the display screen, a rear housing and a conductive coating or layer over the front face of a PCB panel on which light-emitting elements may be mounted. Interconnections are provided between all the components of the shield so as to limit any gaps within the shield to a size sufficiently small to minimize damaging electromagnetic noise.

Abstract: This invention provides a method and apparatus for reducing colour shift in a display screen when a viewer moves to view the screen from an off-centre position. When pixels of LEDs are provided in an asymmetric arrangement, there will not be an equal obscuring effect from one LED on an adjacent LED as the viewer moves off-centre. This is due to an uneven spacing between the LEDs in an asymmetric arrangement. The invention provides protrusions or other obscuring means that may be inserted into the array of LEDs between those LEDs suffering the least obscuring in view of centre so as to equate with those LEDs suffering the most obscuring effect. This brings the light-emitting elements to an even obscuring effect as a viewer moves off-centre to avoid any colour shift.

Abstract: This invention relates to a method and apparatus for the reduction of electromagnetic radiation from display screens. The display screen is substantially encased within a conductive shield formed by the housing around the display screen, a rear housing and a conductive coating or layer over the front face of a PCB panel on which light-emitting elements may be mounted. Interconnections are provided between all the components of the shield so as to limit any gaps within the shield to a size sufficiently small to minimize damaging electromagnetic noise.

Abstract: This invention provides a method and apparatus to selectively compress digital image data for the supply of that information to digital display screens or storage. The invention utilizes a digital input containing a non-linear representation between the value and the intended intensity and linearizes this into a higher order number. If the higher order number is below at least a first threshold, it is transmitted or stored on a lower order data system noting that the higher order bits or channels should all be zero. If the higher order value is above the threshold, the highest order bits of that value are transmitted or stored on the lower order data system so that only the lowest order bits are lost. The received input from the lower order data system can then be decoded and the data sent to drive a digital display or otherwise utilized.

Abstract: This invention relates to a method and apparatus for improving the color rendering of a lamp or light source. Specifically, a solid state light source such as an InGaN LED is driven by a modulated signal in which portions of the signal are provided with different forward currents within a single cycle. The different forward currents can provide a variation in the dominant wavelength emitted from the LED for each portion to provide a broader range of color produced by the LED. The pulses and cycle may be of sufficient frequency to provide an apparent constant light to the human eye without color change although the use of varying dominant wavelengths to provide the overall color can improve the LEDs color rendering. An improvement in such color rendering may be particularly important when the lamp or light source is used for illumination either on its own or in conjunction with other LEDs.