Display Device Light-Absorbing Layer for Color Reproduction

The patent introduces a light-absorbing layer as an intermediary component between the backlight unit and the liquid crystal layer. This layer selectively absorbs specific wavelength ranges of light to modify the spectral composition, enabling improved color reproduction without fundamentally changing the backlight unit structure. The light-absorbing layer acts as a mediator that transforms the conventional backlight output into a spectrum optimized for true color representation.

The patent changes the spectral parameters of the light by introducing a light-absorbing layer with specific absorption characteristics. This layer absorbs light in predetermined wavelength ranges, thereby adjusting the intensity distribution of different color components (red, green, blue) to achieve optimal color reproduction. The parameter change is achieved through selective absorption rather than modifying the entire optical system.

The patent adjusts the spectral parameters by selectively absorbing specific wavelength ranges rather than uniformly reducing all wavelengths. The light-absorbing layer is designed to absorb excess intensity in certain bands while allowing other bands to pass through, thereby rebalancing the color components without proportionally reducing overall brightness. This selective parameter adjustment maintains acceptable light intensity while achieving better color balance.

The patent applies local quality modification by having the light-absorbing layer affect specific wavelength ranges differently. Instead of uniformly attenuating all light, the layer selectively absorbs certain spectral components (predetermined wavelength ranges) while allowing others to pass, creating non-uniform spectral modification that optimizes color balance locally in the spectrum while preserving overall brightness.