Color filter and liquid crystal display provided therewith
AssigneeHitachi, Ltd.
InventorsShinji Sekiguchi, Jun Tanaka
Life of this patent
Estimating the term…
Abstract
Disclosed is a color filter which has a flattening layer that functions also as a wavelength converting layer. The wavelength converting layer converts that portion of light incident to the color filter layer which is in the near ultraviolet region into light having a wavelength longer than the blue region. Thus the red, green, and blue filter segments are improved in light transmittance. In this way it is possible to realize a color filter and a liquid crystal display unit having a high light transmittance and good display characteristics.
Claims9
A method for fabricating a color filter comprising:
- forming a transparent substrate layer;
- forming a color filtering layer on said transparent substrate layer, said color filtering layer comprising a plurality of substantially coplanar color filtering segments;
- and
- forming a flattening layer on and substantially co-extensive with said color filtering layer, said flattening layer including a single kind of material having a wavelength converting property, said flattening layer being a single layer of material.
A method for fabricating a color filter comprising:
- forming a transparent substrate layer;
- forming a wavelength converting layer on and substantially co-extensive with said transparent substrate layer, said wavelength converting layer including a single kind of material having a wavelength converting property, said wavelength converting layer being a continuous layer of material;
- forming a color filtering layer on said wavelength converting layer;
- and
- forming a flattening layer on said color filtering layer.
A method for making a color filter comprising:
- forming a light transmissive layer;
- forming a plurality of color filtering segments on a major surface of said light transmissive layer;
- forming a plurality of first and second wavelength converting segments on less than all of said color filtering segments, thus leaving a plurality of exposed color filtering segments;
- and
- forming a wavelength converting layer as a single layer of material over at least said first and second wavelength converting segments and said exposed color filtering segments,
- said first wavelength converting segments effective for producing first emergent light having a first range of wavelengths greater than a first wavelength value in response to exposure to a first portion of incident light having wavelengths less than said first wavelength value,
- said second wavelength converting segments effective for producing second emergent light having a second range of wavelengths greater than a second wavelength value in response to exposure to a second portion of said incident light having wavelengths less than said second wavelength value,
- said wavelength converting layer being a single layer of material, said wavelength converting layer effective for producing third emergent light having a third range of wavelengths greater than a third wavelength value in response to exposure to a third portion of said incident light having wavelengths less than said third wavelength value.
A method for making a color filter comprising:
- forming a light transmissive layer;
- forming a wavelength converting layer on and co-extensive with said light transmissive layer;
- forming a plurality of first and second wavelength converting segments on said wavelength converting layer;
- forming a first plurality of color filtering segments on said first and second wavelength converting segments;
- forming a second plurality of color filtering segments on said wavelength converting layer;
- and
- forming a flattening layer at least over said first and second wavelength converting segments and over said second plurality of color filtering segments,
- said first wavelength converting segments effective for producing first emergent light having a first range of wavelengths greater than a first wavelength value in response to exposure to a first portion of incident light having wavelengths less than said first wavelength value,
- said second wavelength converting segments effective for producing second emergent light having a second range of wavelengths greater than a second wavelength value in response to exposure to a second portion of said incident light having wavelengths less than said second wavelength value,
- said wavelength converting layer being a single layer of material, said wavelength converting layer effective for producing third emergent light having a third range of wavelengths greater than a third wavelength value in response to exposure to a third portion of said incident light having wavelengths less than said third wavelength value.
Dependencies are inferred from the claim text.