What is light diffuser sheet?
Light diffuser panel is a functional panel that achieves uniform light scattering through special surface treatment or the addition of diffusion particles. It is widely used in LED lighting, advertising light boxes, display backlights and other fields. Its core function is to eliminate glare spots, improve light uniformity, and maintain high light transmittance. If you need soft light effect material or LED lampshade special board, light diffuser sheet will be an ideal choice.
Four core material types of light diffusers
1. PC light diffuser (Polycarbonate Light Diffuser)
Features: strong impact resistance, high temperature resistance (-40°C~125°C), suitable for outdoor LED street lamp covers, anti-riot light boxes, and UV resistance.
2. PMMA light diffuser (Acrylic diffuser)
Features: light transmittance up to 92%, high surface hardness, suitable for indoor advertising light boxes, LCD screen light guide plates.
3. PS light diffuser (Polystyrene diffuser)
Features: low cost, lightweight, mostly used for disposable lighting equipment and low-end lamp covers.
light diffuser sheet production
light diffuser sheet test
Advertising light box board
Five core advantages of light diffuser
1. Light uniformity is improved by more than 90%
Through micro-bead diffusion layer or frosted surface treatment, the "graininess" of LED point light source is eliminated to achieve glare-free lighting, which meets the EN 12464 lighting standard.
2. Balance of light transmittance and haze
Light transmittance: 80%~93% (depending on material and thickness)
Haze: 30%~95% adjustable, high haze light diffuser is suitable for privacy partitions, and low haze is used for high brightness demand scenes.
3. Weather resistance and long life
UV-resistant models (UV-resistant Light Diffuser) can be used outdoors for more than 10 years without yellowing.
PC material board has passed UL94 V-0 flame retardant certification and is suitable for fire channel indicator light box.
4. Lightweight and easy to process
Density 1.1~1.4g/cm³, supports laser cutting and CNC engraving, and can be customized for special-shaped sizes (arc light diffuser, punching diffuser).
6 major application scenarios of light diffusion plates
- LED lighting: street lamp covers, panel lights, downlights, stage lights
- Advertising display: light diffusion plates for advertising light boxes, price tags for supermarkets, soft light layers for exhibition cabinets
- Architectural decoration: translucent ceilings, luminous walls, partition privacy glass
- Automotive industry: in-car atmosphere lamp covers, automotive-grade light diffusion plates
- Medical equipment: surgical shadowless lamps, medical-grade light diffusion plates
How to choose a high-quality light diffuser?
1. Key parameter matching
Transmittance and haze:
General lighting: transmittance 85% + haze 70%~85%
Highlight display: transmittance 90% + haze 30%~50%
Thickness selection: 1mm~8mm (1~3mm for ultra-thin light boxes, 4~8mm for outdoor lighting)
2. Environmental adaptability test
Anti-UV light diffusers should be selected for outdoor use, and the temperature difference resistance should be tested (-30°C~80°C cycle experiment).
Moisture-proof coating models should be selected for humid environments to avoid moisture causing a decrease in transmittance.
3. Certification and warranty
Prioritize products that have passed RoHS and REACH environmental certifications.
High-quality manufacturers provide a 5~10-year warranty (such as a ten-year yellowing-resistant light diffuser).
As a professional light diffusion board manufacturer, we provide solutions from standard products to high-end customized solutions:
- Various materials: PC/PMMA/PS/composite boards
- Functional coatings: anti-static, anti-fingerprint, antibacterial treatment
- Fast delivery: 72-hour delivery for conventional specifications, supporting global logistics
Contact us now to get free samples and industry-specific quotes
FAQ
Q: Q: Will the light diffuser plate turn yellow after long-term use?
A: A: Inferior PC/PMMA plates may turn yellow due to ultraviolet aging. Choosing a model with double-sided UV curing coating can avoid this.
Q: Q: Are customized sizes and shapes supported?
A: A: Yes, professional manufacturers provide laser cutting light diffuser plate services, which can produce special-shaped structures such as round and wavy shapes.
Q: Q: How to test the light diffusion effect?
A: A: You can use the "point light source penetration test": Place the LED lamp beads behind the plate in a dark room and observe the uniformity of light diffusion.