Optical Films for Reflective LCDs
(Front Diffuser, Wide-band λ/4 Films)
Polarizing film, retardation film and diffuser were combined into a single unit for reflective color LCD.
Broad spectrum λ/4 films provide constant retardation (λ/4) to any wavelength. The front diffuser realizes a brighter reflective panel by controlling dispersing characteristics. We have combined those with polarizing films into one single unit. |
■ Structures of inner reflective type LCD |
The polarizing film,the retardation film and the front diffuser are combined into one unit. |
■Wavelength characterristics of board spectrum λ/4 films |
Constant retardation (λ/4) is given to any wavelength.Conventional wavelength film shifts the retardation of blue and red lights from λ/4, resulting in deteriorated the contrast. |
■Optical properties of front diffuser |
By controlling the diffusing property, brighter reflective panels can be realized. |
| Type | Haze (％) |
| SN1 |
88 |
| SN2 |
80 |
| SN3 |
70 |
| SN4 |
60 |
| SN5 |
50 |
| SN6 |
40 |
| SN7 |
30 |
| SN8 |
20 |
|
The numerical value is measurements of the Frontodifuzar unit. |
