A High Transparent LCD Display without using polarizer has been development. Its name is Polymer Nematic Liquid Crystal Display (PNLC). A PNLC is a nematic liquid crystal system lightly cross-linked with a polymer network formed by in-situ photopolymerization so that the Liquid Crystal will present off and on states in the electrified state. This puts PNLC between: Conventional nematic LCDs (TN / IPS / VA) and Polymer-dispersed systems (PDLC).
How PNLC Works (Step-by-Step)
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Material Structure
- Nematic LC host (high birefringence is common)
- ~1–5 wt% polymerizable monomer
- UV curing forms a continuous but sparse polymer network
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Optical States
OFF state (no field):
- LC director is distorted by polymer anchoring
- Produces:
- Controlled scattering, or
- Randomized birefringence
ON state (electric field applied):
- LC aligns with the field
- Polymer network limits flow but allows reorientation
- Optical state becomes uniform
Key Features
- Transparent with transmission rate: ~90% (without polarizer used)
- Fast response: ~20ms at 10V, ~120ms at 5V
- Contrast Rate (CR): ~3.
- Vop: 3.3-10V
- Current consumption: 1mA/3.3V
- Interface: Parallel, SPI or I2C
- Temperature range: Storage: -30℃~80℃, Operating: -20℃~70℃
- Dyes can be added to produce different high transparent color displays.
Applications
Vehicular Head Up Display
Smart Home
Aviation
Wearable
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If you have any questions, please contact our engineering.