SMD LED Lens Selection Guide: Dome, Flat, Diffused & Clear - What's the Difference?

发布于: 2026-08-12 09:39

同一颗0603灯珠,为什么有的刺眼、有的柔和、有的正面特别亮?差别不在芯片,而在封装胶体结构。贴片LED常见四种胶体形态:透明平头、透明球头、雾面(扩散)、以及带色透明。选错结构,再贵的芯片也出不来想要的效果。

一、四种胶体结构对照表

结构 光学特性 典型发光角度 视觉观感 适用场景
透明平头 光线自然发散,光效最高 110°-120° 亮但略刺眼,可见灯珠亮点 背光、大面积指示、被扩散罩遮盖的内部指示
透明球头 透镜聚光,轴向光强翻倍 15°-30° 正前方很亮,侧面暗 面板开孔、导光柱、远距离可视指示
雾面(扩散) 胶体掺扩散剂,光线柔化 约120°且均匀 柔和无眩光,看不到内部芯片 操作者近距离观察的面板指示、家电状态灯
带色透明 胶体本身带颜色,过滤杂光 110°-120° 灭灯时胶体即显色,外观统一 多灯阵列、对外观颜色一致性有要求的面板

二、怎么快速判断该用哪种?

  • 灯藏在扩散罩/导光板后面→ 透明平头,光效最高,不浪费光。
  • 面板开个小孔直出光→ 透明球头,聚光穿过小孔,1米外仍清晰。
  • 用户盯着面板看→ 雾面,柔光不刺眼,家电、仪器仪表标配。
  • 一排多灯、外观要求高→ 带色透明,灭灯状态整排颜色统一。

三、两个容易被忽略的细节

1. 雾面会牺牲亮度。扩散剂会吸收部分光能,同芯片下雾面款光强约为透明款的60%-70%。如果既要柔光又要亮度,选型时要把芯片亮度提高一档,或直接咨询供应商按目标光强配芯片。

2. 结构不同,封装总高不同。球头款比平头款高0.2-0.5mm,替换料号前要核对结构间隙。弘呈光电0603/0805系列四种胶体结构全覆盖,规格书中均标注总高与发光角度,替换时可直接对照。

四、批量装机的一致性要求

胶体结构选定后,批量一致性靠分选保障。同一面板上的多颗指示灯如果亮度、波长不一致,用户一眼就能看出"花屏"。弘呈光电出货默认按光强±10%、波长±1nm分档,雾面款与透明款可配平至同一视觉亮度,工程样品免费开放申请。

不确定选哪种结构的,可以把应用场景(安装方式、观察距离、面板开孔尺寸)发给弘呈光电工程团队,我们会按"结构-角度-光强"三要素直接给出料号建议。

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Frequently Asked Questions (FAQ)

1. Can I get free LED samples from Hongcheng Optoelectronics?

Yes. Dongguan Hongcheng Optoelectronics Co., Ltd. supports sample testing — you can verify electro-optical parameters, dimensions and soldering compatibility before placing bulk orders. To request samples, call +86 139 2571 4318 (WeChat same number) or email sales@led-hc.com with the model and quantity you need.

2. What is the minimum order quantity (MOQ)?

The MOQ for DIP (through-hole) LEDs is 1K (1,000 pcs); for SMD LEDs the MOQ is 3-5K, shipped in tape-and-reel packaging. The MOQ for customized models (special wavelength, brightness or voltage binning) is confirmed per custom solution. Please contact sales for an accurate quotation and MOQ for your model.

3. What are the lead times for samples and mass production?

Sample lead time is typically 3-4 working days; in-stock samples are usually shipped within 2 working days. Mass production lead time is typically 10-15 working days, confirmed according to order quantity and production schedule — please contact sales for an accurate lead time.

4. Are the products RoHS certified?

Yes. All Hongcheng LED diodes are RoHS and CE certified, made with A-grade chips, 99.9% pure gold wire bonding and high-temperature resistant encapsulant — anti-sulfuration and low light decay, meeting the environmental and reliability requirements of home appliance, automotive and industrial equipment applications.

5. Can voltage, wavelength, brightness or color be customized?

Yes. We support binning and customization of brightness, wavelength, voltage and color, and provide OEM services. Our product range covers 0201-5730 SMD LEDs, addressable RGB LEDs with built-in IC, side-emitting LEDs, and 2mm-10mm DIP LEDs, packed in vacuum moisture-proof tape and reel, suitable for automated SMT mounting and reflow soldering.

6. How do I get the product datasheet?

Every model has an official PDF datasheet (electro-optical parameters, dimensions, pad design, tape packaging and reliability test data) — 259 datasheets in total, all free to download with no login required. Browse the datasheet center (https://www.hc-led168.com/datasheets) by series, or download directly from each product page.

7. Is Hongcheng Optoelectronics a factory or a trading company?

Hongcheng Optoelectronics is a member of Guangyu Group — a professional LED diode source manufacturer based in Dongguan, Guangdong, China, with 20+ years of LED packaging experience. Factory-direct sales; over 50% of raw materials are imported from South Korea, Japan and Taiwan, China. Quality and lead time are controlled directly by the factory.