行业组件数据 · 2026

导光板

A transparent optical component that evenly distributes light from LED sources across the surface of LED panel lights.

技术定义与适配语境
典型 导光板 会按材料、尺寸公差、适配关系和失效风险在 电气设备制造 中评估。

A Light Guide Plate (LGP) is a precision-engineered optical component typically made from acrylic (PMMA) or polycarbonate, designed to transmit and uniformly diffuse light from edge-mounted LED sources across its entire surface area. It utilizes microstructures (dots, prisms, or V-grooves) on its surface or within its body to control light propagation through total internal reflection and controlled extraction, ensuring uniform luminance distribution in LED panel lighting applications.

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组件规格

定义
A Light Guide Plate (LGP) is a precision-engineered optical component typically made from acrylic (PMMA) or polycarbonate, designed to transmit and uniformly diffuse light from edge-mounted LED sources across its entire surface area. It utilizes microstructures (dots, prisms, or V-grooves) on its surface or within its body to control light propagation through total internal reflection and controlled extraction, ensuring uniform luminance distribution in LED panel lighting applications.
工作原理
Operates on the principle of total internal reflection (TIR). Light enters from LEDs positioned along the edges and travels through the plate. Micro-optical features (such as printed dots, laser-engraved patterns, or molded structures) disrupt TIR at calculated points, extracting light perpendicularly from the surface. The density and size of these features are graded to compensate for light attenuation, achieving uniform surface illumination.
材料
Primary: Polymethyl methacrylate (PMMAAcrylic) - preferred for high transmittance (~92%) and low cost. Alternative: Polycarbonate (PC) - used for higher heat resistance (up to ~120°C) and impact strengthbut with slightly lower light transmission (~88-90%). Optical gradeUV-stabilizedwith additives for flame retardancy (e.g.UL94 V-0 rating).
Haze
<1% (clear LGP) or customized for diffusing types
Thickness
1.0-3.0 mm (typical)
Transmittance
>90% (PMMA)
Surface Pattern
Laser engraved, printed dots, or injection-molded microstructures
Refractive Index
~1.49 (PMMA), ~1.58 (PC)
Thermal Stability
Up to 80°C (PMMA), 120°C (PC)
标准
ISO 4892-2 (Plastics - Exposure to light sources)DIN 5036-3 (Radiometric and photometric properties of materials)

行业分类与别名

导光板 的常用贸易名称、技术标识和检索关键词。

Light Guide PlateLGPLED panel light componentoptical diffuserPMMA light guideuniform lightingedge-lit panellight distribution plate导光板Light Guide Plate (LGP)电气设备制造 导光板

上级产品

该组件会出现在以下整机或工业产品中。

LED面板灯
采用表面安装的扁平照明灯具，利用发光二极管（LED）在面板表面产生均匀的照明效果。
查看产品详情 ->

FMEA · 风险与缓解

诱因 → 失效模式 → 工程缓解

Incorrect pattern design or manufacturing tolerance errors->Non-uniform light output (bright spots or dark areas)->Implement rigorous optical simulation (e.g., LightTools, TracePro) before production and use precision laser engraving or injection molding with strict QC on pattern accuracy.
Material degradation from high operating temperatures or UV exposure->Reduced light transmission, yellowing, or cracking->Use UV-stabilized, heat-resistant grades (e.g., PC for high-temp applications) and ensure adequate thermal management in the light fixture design.
Mechanical stress during handling or assembly->Cracks or fractures, especially in thin LGPs->Design with appropriate thickness and edge supports, use protective films during handling, and train assembly personnel on proper handling procedures.

工业生态与工程逻辑

兼容对象
LED Panel LightsEdge-lit Backlight Units (BLUs) for displaysCommercial and residential flat lighting fixtures
可替换件
Mitsubishi Chemical (Acrypet PMMA)Evonik (PLEXIGLAS)SABIC (LEXAN PC)Chi Mei (CM-205 PMMA)Röhm (PMMA grades)
0
Yellowing or degradation from prolonged UV/heat exposure
1
Surface scratching reducing optical performance
2
Warping due to thermal expansion if poorly designed
3
Non-uniform brightness from imprecise pattern design or manufacturing defects

合规与检测

tolerance
Thickness tolerance: ±0.1 mm; Pattern position accuracy: ±0.05 mm; Surface flatness: <0.2 mm/m
test method
Light uniformity tested with integrating sphere and luminance meter per IES LM-79; Material properties tested per ASTM D1003 (transmittance/haze) and UL 746A (thermal aging).

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采购评估维度

不是客户评论，也不是实时热度。以下维度用于前期 RFQ 准备和供应商评估。

技术文档
4/5
制造能力
4/5
可检验性
5/5
供应商透明度
3/5

这些分值是采购评估维度示例，不代表真实客户评分、具体国家买家反馈或实时询盘。

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常见问题

What is the main function of a Light Guide Plate in LED panels?

Its primary function is to uniformly distribute light from edge-mounted LEDs across the entire surface of the panel, eliminating hotspots and ensuring consistent brightness for comfortable illumination.

Why is PMMA commonly used for LGPs?

PMMA (acrylic) offers excellent optical clarity (high light transmittance), ease of precision machining or molding for microstructures, good UV stability, and cost-effectiveness compared to alternatives like polycarbonate.

How does the pattern on an LGP affect light output?

The pattern (dots, grooves, or prisms) controls light extraction by scattering light at specific points. A gradient pattern—denser near the LED sources and sparser farther away—compensates for light intensity loss, enabling uniform surface emission.

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CNFX Industrial Component Index · 电气设备制造

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URN:CNFX:ME:UNIT:LIGHT_GUIDE_PLATE_LGP_