What is a Light Guide Plate?

The invisible workhorse inside every LCD backlight — converting edge LEDs into uniform surface illumination.

Precision Optical Component

A Light Guide Plate (LGP) is a transparent acrylic or polycarbonate sheet with a microscopic dot pattern etched onto its surface. It takes light from edge-mounted LED strips and redirects it evenly across the entire display — making it a critical part of every LCD backlight unit (BLU).

When an LGP yellows, cracks, or deforms due to heat aging, the screen develops dark spots, uneven brightness, or complete backlight failure. Replacing the LGP is often more cost-effective than replacing the entire LCD panel.

Common applications: LCD TVs, laptop screens, desktop monitors, tablets, smartphones, automotive displays, advertising light boxes, LED panel lights.

Product Specifications

Three product lines covering every backlight repair scenario.

Category	Size Range	Thickness	Material	Dot Type	Application
📺 LCD TV / Monitor LGP
Large TV LGP	32″ – 85″	2mm – 8mm	PMMA / PS	Laser dot / V-cut	Samsung, LG, Sony, TCL, Hisense, Vizio TV backlight repair	Quote
Monitor LGP	19″ – 32″	1mm – 3mm	PMMA	Laser dot	Dell, HP, Lenovo, Asus, Acer, Samsung desktop monitors	Quote
💻 Laptop / Tablet / Smartphone LGP
Laptop LGP	11.6″ – 17.3″	0.2mm – 1.5mm	PMMA / PC	Micro-dot / UV printing	MacBook, Dell XPS, HP Spectre, Lenovo ThinkPad, Acer, Asus notebooks	Quote
Tablet LGP	7″ – 12.9″	0.2mm – 0.8mm	PMMA / PC	Micro-dot	iPad, Samsung Galaxy Tab, Huawei MatePad, Xiaomi Pad	Quote
Smartphone LGP	4.7″ – 6.9″	0.2mm – 0.5mm	PC	Nano-imprint	iPhone, Samsung Galaxy, Xiaomi, Huawei, OPPO mobile phones	Quote
💡 Advertising Light Box / Commercial LED Panel LGP
Light Box LGP	Custom (up to 3m)	2mm – 8mm	PMMA / PS	Laser dot / screen print	Advertising light boxes, signage, retail displays, menu boards	Quote
LED Panel Light LGP	300×300 – 1200×600mm	2mm – 4mm	PMMA / PS	Laser dot	Office ceiling LED panels, architectural lighting, hospital illumination	Quote
Automotive LGP	5″ – 15″	0.5mm – 2mm	PC (heat-resistant)	Precision laser dot	Car navigation screens, dashboard displays, rear-seat entertainment	Quote

Don't see your size? We accept custom orders. Send us your specifications →

Choose Your Material

Three material grades for different performance and budget requirements.

💎

PMMA (Acrylic)

92%+

Light Transmittance

High optical clarity
UV & yellowing resistant
Best for premium TV/monitor
Scratch-resistant surface
Temperature stable up to 80°C
Custom dot patterns available

🔲

PS (Polystyrene)

88%+

Light Transmittance

Cost-effective option
Good light diffusion
Ideal for light boxes
Easier to cut & shape
Budget-friendly for volume
Available in large sheets

🛡️

PC (Polycarbonate)

88%+

Light Transmittance

Maximum impact resistance
Heat resistant (up to 120°C)
Flexible — won't crack
Best for automotive use
Thin sheets (0.2mm) possible
Flame retardant (V-0/V-2)

Two Quality Grades Available

Choose based on your repair scenario and customer expectations.

A

Grade A — OEM Replacement Quality

Brand-specific LGP with factory-matched dot pattern, thickness, and optical characteristics. Direct drop-in replacement for original backlight — no brightness loss, no hotspots. Recommended for branded TV/monitor repair shops.

B

Grade B — Universal / Generic LGP

Universal pattern LGP cut to your required dimensions. Slightly lower dot precision than OEM but fully functional for most repair scenarios. Best value for volume refurbishers and light box fabricators.