LED backlight for display systems
AssigneeApple Inc.
InventorsWei Chen, Jun Qi, Victor Yin, John Zhong
Life of this patent
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Abstract
An LED backlight method and apparatus for display systems provides a plurality of light emitting diodes having different white point colors. At least two of the light emitting diodes having different white point colors are selected to produce a light of a predetermined white point color when the light outputs of the selected light emitting diodes are mixed. The selected light emitting diodes are mounted on a display panel in a predetermined order at spatially distributed positions for mixing their light outputs to produce the light of the predetermined white point color to illuminate the display panel with the light of the predetermined white point color.
Claims21
An LED backlight method for display systems, comprising:
- providing a plurality of light emitting diodes;
- categorizing the light emitting diodes into bins, wherein each bin references a separate range of white point colors;
- determining an optimal order for at least two light emitting diodes of the plurality, said at least two light emitting diodes having white point colors associated with separate bins, the optimal order of the at least two light emitting diodes for producing a light of a predetermined white point color when the light outputs of the at least two light emitting diodes are mixed;
- and
- mounting the at least two light emitting diodes on a display panel in the optimal order at spatially distributed positions for mixing their light outputs to produce the light of the predetermined white point color to illuminate the display panel with the light of the predetermined white point color.
An LED backlight for display systems, comprising:
- a plurality of light emitting diodes having different white point colors;
- at least two of the light emitting diodes having different white point colors being selected to produce a light of a predetermined white point color when the light outputs of the selected light emitting diodes are mixed;
- a display panel;
- and
- the selected light emitting diodes being mounted on the display panel in a predetermined order at spatially distributed positions for mixing their light outputs to produce the light of the predetermined white point color to illuminate the display panel with the light of the predetermined white point color;
- wherein the predetermined order is generated by comparing a plurality of LED purmutations in order to identify a configuration which minimizes near field and far field color differences within a display system.
Dependencies are inferred from the claim text.