Optical Grade LSR Light Guide Plate

The Optical Grade LSR (Liquid Silicone Rubber) Light Guide Plate is a high-precision optical component engineered to uniformly diffuse and transmit light from edge-lit LED sources into a smooth, even planar light output. Developed and manufactured by 橡楚（湖北）橡胶有限公司 at our facility in 湖北省鄂州市鄂城区经济开发区凡口街道内河巷54号, this product leverages the inherent advantages of LSR material to overcome common limitations of traditional acrylic (PMMA) light guide plates, including brittleness, yellowing over time, and poor low-temperature performance.

Our optical-grade LSR formulation is designed with ultra-high purity, minimal light scattering impurities, and tailored refractive index matching to deliver consistent light transmission across the entire surface of the plate. Unlike injection-molded PMMA light guide plates, our LSR light guide plates maintain optical clarity and mechanical flexibility even under long-term exposure to heat, UV radiation, and fluctuating environmental conditions, making them ideal for both indoor and semi-outdoor applications that require long-term performance stability.

As a specialized manufacturer of Liquid Silicone Rubber products, we control every step of the production process from raw material compounding to final optical inspection, ensuring each light guide plate meets strict optical uniformity standards before delivery. Our core selling points include consistent optical performance, long service life, design flexibility for custom form factors, and reliable mechanical durability.

Technical Specifications

Material Properties

Physical Performance

Process Parameters

Product Advantages

1. Superior Long-Term Optical Stability

Unlike traditional PMMA light guide plates that tend to yellow and lose transmittance after 2–3 years of continuous use, our addition-cured LSR formulation has extremely high resistance to UV radiation and thermal oxidation. After 5 years of continuous operation under normal indoor conditions, the light transmittance loss is less than 2%, far outperforming PMMA alternatives. This reduces long-term maintenance and replacement costs for end products.

1. Excellent Mechanical Durability and Flexibility

LSR is inherently flexible and impact-resistant, eliminating the risk of cracking or shattering during transportation, installation, or use that plagues rigid acrylic light guide plates. For curved or flexible lighting applications, our LSR light guide plates can maintain consistent optical performance under repeated bending, a capability that rigid PMMA cannot match.

1. Customizable Design and Form Factor

Liquid silicone rubber processing enables complex shapes, curved profiles, and integrally molded light guide dot structures that are difficult to achieve with traditional PMMA cutting and engraving processes. We can customize light guide plate dimensions, hardness, thickness, and dot patterns to match the specific LED layout and light output requirements of your product, whether you need flat plates for panel lighting or contoured plates for specialized automotive or medical applications.

1. Safe and Non-Toxic for Sensitive Applications

Our optical grade LSR is fully cured with no residual low-molecular-weight silicone, meets RoHS 2.0 and REACH regulatory requirements, and is inherently odorless. This makes it suitable for use in consumer electronics, medical devices, and food-contact applications where material safety is a critical requirement.

1. Improved Low-Temperature Performance

Unlike PMMA which becomes brittle at temperatures below 0°C, our LSR light guide plates maintain full flexibility and mechanical strength even at -40°C, making them suitable for outdoor lighting equipment, cold storage lighting, and automotive lighting applications that experience wide temperature fluctuations.

Applications

Optical Grade LSR Light Guide Plates are suited for a wide range of lighting and display applications, including:

• Consumer Lighting: Edge-lit LED panel lights, under-cabinet lighting, night lights, and decorative ambient lighting. The long-term stability of LSR makes it especially ideal for commercial lighting installations that require 5+ years of maintenance-free operation.
• Consumer Electronics: Smartphone flash diffusers, smart watch display backlights, notebook keyboard backlights, and portable power bank indicator panels. The thin-form capability and impact resistance of LSR improve the drop durability of portable electronics.
• **Automotive Industry: Interior ambient lighting strips, door panel lighting, dashboard indicator panels, and center console light guides. The resistance to automotive temperature cycles and UV exposure from sunlight ensures consistent light output over the service life of the vehicle.
• Medical Devices: Surgical shadowless lamp diffusers, medical device control panel backlights, and portable medical lighting. The non-toxic, autoclavable nature of LSR meets hygiene requirements for medical environments.
• **Specialized Lighting: Flexible LED strip light diffusers, cold storage lighting, outdoor emergency lighting, and marine lighting. The low-temperature resistance and water resistance of LSR perform reliably in harsh environmental conditions.

Selection Guide

Hardness Selection

• 30–40 Shore A: Recommended for flexible applications that require repeated bending, such as curved ambient lighting strips and flexible wearable device backlights.
• 40–60 Shore A: The most common general-purpose hardness, ideal for flat panel lighting, consumer electronics backlights, and automotive interior applications that balance flexibility and structural stability.
• 60–70 Shore A: Recommended for rigid structural applications that require higher dimensional stability, such as large panel lights and fixed medical device components.

Size Specifications

We offer standard stock sizes for common dimensions (100×100mm 1mm thickness, 300×300mm 2mm thickness) for small batch testing, and support full custom size and thickness production for mass orders. For applications requiring high light output uniformity, we recommend working with our engineering team to adjust thickness and dot pattern based on your LED pitch and power to optimize performance.

Material Grade

• Standard Optical Grade: Meets general lighting and consumer electronics requirements, complies with RoHS 2.0.
• Low-TOC Medical Grade: Formulated for medical device applications, with lower residual organic content for enhanced biocompatibility, available on request.
• Flame-Retardant Grade: UL 94 V-0 rated for applications requiring enhanced fire safety, such as commercial building lighting and automotive interior components.

Quality Assurance

At 橡楚（湖北）橡胶有限公司, we maintain a complete quality management system certified to ISO 9001, with standardized quality control processes implemented at every stage of production from raw material incoming inspection to final product shipment. Each batch of optical grade LSR raw material is tested for optical transmittance and haze before processing, and every finished light guide plate undergoes 100% visual inspection for optical uniformity and surface quality before delivery.

We are committed to delivering consistent, high-quality LSR products to our global customers, and we work closely with clients to adjust product specifications to meet their unique application requirements.

For inquiries, custom quotations, or technical support, please contact us at:

• Address: 湖北省鄂州市鄂城区经济开发区凡口街道内河巷54号
• Phone: +86 18071171144
• Email: churubber@163.com