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- Optical Films for Reflective LCDs (Front Diffuser, Wide-band λ/4 Films)
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.
Outline
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.
