OP6825 polariser for liquid crystal display (LCD)

Polarizer for Liquid Crystal Display (LCD) Description

Polarizers are critical optical components in Liquid Crystal Displays (LCDs) and account for approximately 20–30% of the overall production cost. The polariser filters natural light by permitting only light waves aligned with its transmission axis to pass, while absorbing the remainder, thereby producing polarised light.

In an LCD, the lower polariser converts light from the backlight into polarised light. The upper polariser analyses light modulated by the liquid crystal layer to form images. The display module does not operate without both polarisers.

Constructed from multilayer polymer films, a typical polariser comprises the following key layers:

·       PVA Film (Polarising Layer): This core layer achieves polarisation. It is produced by stretching and dyeing polyvinyl alcohol (PVA) to align iodine or dye molecules directionally.

·       TAC Films: Triacetyl cellulose films enclose the PVA layer, protecting it from moisture, air and UV exposure. This construction enhances durability and performance.

·       Adhesive Layers: These layers bond reflective or protective films to the polariser. A pressure-sensitive adhesive on the peelable side provides secure attachment.

·       Release Film: A PET film coated with silicone protects the adhesive layer during handling.

·       Protective Film: A low-adhesion PE film covers the external TAC surface.

·       Reflective Film: A PET film coated with aluminium or other reflective materials improves brightness or produces targeted visual effects.

Polarisers can be classified as transmissive (upper sheet) or reflective (lower sheet) based on their function in the LCD module. They are used in televisions, monitors, smartphones and other display applications.

Polarizer for Liquid Crystal Display (LCD) Applications

·       Consumer Electronics – Televisions, smartphones, tablets, monitors and laptops.

·       Automotive Displays – Instrument clusters, head-up displays (HUDs) and infotainment screens.

·       Medical Equipment – LCD screens for diagnostic and monitoring devices.

·       Industrial Controls – Displays for machinery, control panels and meters.

·       Wearable Devices – Smartwatches and fitness trackers featuring LCDs.

·       Aerospace and Military – Displays with high contrast and durability for cockpits and field equipment.

·       Digital Signage – Outdoor and indoor advertising displays that require high visibility.

·       Scientific Instruments – Optical measurement systems and laboratory equipment.

Polarizer for Liquid Crystal Display (LCD) Packaging

Our products are packaged in customised cartons of different sizes depending on the material dimensions. Small items are contained in PP boxes, while larger items are packed in bespoke wooden crates. We strictly follow packaging customisation protocols and utilise appropriate cushioning materials to provide protection during transport.

Packaging: Carton, Wooden box, Paper barrel, Iron barrel, or Customised.

Please review the packaging details provided for further information.

Polarizer for Liquid Crystal Display (LCD) FAQs

Q1: What is an LCD polariser?
A: An LCD polariser is an optical film that permits only light with a particular polarisation direction to pass. It thereby regulates the brightness and contrast of liquid crystal displays.

Q2: Why are polarisers essential in LCDs?
A: Polarisers convert unpolarised backlight into polarised light. They also analyse light modulated by liquid crystals to form images. LCDs cannot display content in their absence.

Q3: What materials are used in LCD polarisers?
A: Common materials used are PVA (Polyvinyl Alcohol) for the polarising layer, TAC (Triacetyl Cellulose) for protection, and various adhesives, reflective films and protective layers, including PET and EVA.

Related Information

Properties of Polariser Films

Impact of Polariser Properties on LCD Performance