| 摘要 |
The invention is related to thin film optical filters, and can be used in liquid crystal displays (LCD) in order to increase their brightness, and provide savings in energy consumption. According to the invention, a reflective color filter for visible light substantially transmitting a light of the chosen spectral range entering into it and substantially reflecting a visible light of other spectral ranges, includes an odd total number of alternate nonmetallic and metal layers, and the first and last layers are nonmetallic ones, and each metal layer is placed between nonmetallic layers, each nonmetallic layer possesses a refractive index not less than 2.2 and thickness not less than 40 nanometers, and each metal layer possesses the thickness in a range from 10 to 40 nanometers. |
| 主权项 |
1. A color display device comprising at least one transparent plate with control electrodes located on it, a layer of the electro-optical material deposited on this plate, a light source, and at least two reflective color filters,
wherein each reflective color filter substantially reflects an incident visible light of the chosen spectral ranges and substantially transmits an incident visible light of other spectral ranges, including an odd total number of alternate nonmetallic and metal layers, and the first and last layers are nonmetallic ones, and each metal layer is placed between nonmetallic layers, wherein each nonmetallic layer possesses a refractive index of not less than 2.2 and thickness of not less than 40 nanometers, and each metal layer possesses the thickness in a range from 10 to 40 nanometers, and the at least two reflective color filters have a different transmission spectra and a different reflection spectra from each other, wherein a light, reflected from each of mentioned reflective color filters, after re-reflections in the light source at least partially transmits through other mentioned reflective color filter. |
