Patent ID: 9502477
Filing Date: 2016-11-22
CPC Classification: G02B,H01L

Claim Text:
1. A display apparatus, comprising: a display device formed over a substrate and having a plurality of pixel areas configured to emit different colors of light; and a color saturation filter formed over the pixel areas and including i) a first thin film, ii) a second thin film, and iii) a spacing layer interposed between the first and second thin films, wherein each of the first and second thin films is formed of a plurality of stacked layers having different refractive indexes, wherein the color saturation filter has a substantially uniform thickness over the pixel areas, wherein the different colors of light include a first color of light, wherein the thickness T2 of the spacing layer satisfies the expression of nλ/2(0.8)≦T2≦nλ/2(1.2), and wherein the thickness T1 of each layer forming the first and second thin films satisfies the expression of mλ/8(0.8)≦T1≦mλ/8(1.2), where λ is the central wavelength of the first color of light and n and m are integers.