LED Sample Request Guide: How to Apply, What to Request & Testing Checklist

发布于: 2026-08-12 09:40

几乎所有灯珠厂家都写着"免费样品",但真正会用样品的工程师不多——有人申请了三五种颜色各 10 颗,点亮看一眼"挺亮的"就批量下单,量产才发现色差、死灯,样品阶段该暴露的问题一个没暴露。

这篇讲清楚三件事:样品申请时提供什么信息、应该申请哪些规格、拿到样品后怎么测。

一、申请样品前,先准备好这 5 条信息

给厂家的信息越具体,拿到的样品越接近量产状态:

1. 封装与尺寸:如 0805 贴片 / 5mm 直插圆头

2. 颜色与波长:不要只说"绿色",要说"纯绿 520-525nm"还是"普绿 568nm"

3. 亮度要求:有目标值最好(如 ≥400mcd @20mA),没有就说明应用场景让厂家推荐档位

4. 数量与用途:打样验证一般每款 50-100 颗足够(留够老化测试的损耗)

5. 特殊要求:防硫化、低功耗 2mA、宽温、车规等,申请时一次说清

一句话模板:"0805 纯绿 520-525nm,亮度 400mcd 档,工业设备指示灯用,需要窄 Bin,申请 100 颗做验证。"——厂家看到这样的需求,会直接按量产标准出样。

二、样品清单建议:别只申请"目标款"

聪明的申请方式是横向对比

  • 目标型号 + 相邻亮度档各一份(验证降额使用的效果)
  • 目标颜色 + 易混淆色各一份(如纯绿和普绿、橙和红,肉眼并排对比)
  • 双色灯珠申请共阴、共阳各一份(接线验证极性)
  • 怀疑来料渠道杂乱时,把在用品也一起送测对比

弘呈光电的样品政策:常规型号免费,每款 50-100 颗,1-2 天寄出;定制款(特殊波长、特殊胶体)先评估再出样,周期 3-7 天。

三、拿到样品后:6 项实测清单

1. 点亮一致性(最重要)

随机取 20 颗,同一块板、同一路 20mA 驱动,并排点亮:肉眼观察亮度是否均匀、颜色是否一致。同一 Bin 的灯珠应该"看不出个体差异"。

2. 光电参数抽测

有条件用积分球测 IV 和主波长;没有条件就用稳压电源+万用表测 VF 分布,同批 VF 离散应 ≤0.1V。

3. 低电流表现

调到 2-5mA 点亮:劣质灯珠低电流下明显不匀亮或出现暗点,优质灯珠依然均匀。电池供电项目必测这项。

4. 焊接耐受

按你的实际工艺过一遍回流焊(260℃/10s)或烙铁焊(320℃/3s),焊后复测,不该出现死灯、变暗、胶体发黄。

5. 高温点亮(工业项目必做)

60-85℃ 环境下额定电流连续点亮 72-168 小时,光衰应 ≤2%,胶体不黄变。

6. 静电敏感项(蓝/绿/白光必测)

模拟人体静电接触引脚后复测——正规测试要 ESD 枪,简易做法是干燥环境化纤衣物摩擦后触摸引脚,再点亮观察有无暗伤变暗。

四、样品确认后,别忘了锁定两件事

  • 锁定 Bin 档:让厂家把样品对应的分档参数(波长 Bin、亮度 Bin、VF 档)写进报价单,量产按同档出货
  • 留样封存:双方各留一份样品签字封存,将来收货验收的比对基准

五、FAQ

Q:样品免费吗?运费谁出?

常规型号样品免费,运费一般到付或由厂家承担(各厂政策不同,我们常规型号样品和运费都免)。

Q:样品和量产品质会不一样吗?

不规范的厂家确实存在"样品精挑、量产放水"。识别方法:要求样品从正常量产批次中随机抽取,并索要该批次的分光数据。

Q:申请样品需要提供公司资质吗?

正规厂家为避免同行套样会简单登记公司信息,但不需要复杂资质。提供项目名称和应用场景即可。

六、小结

样品申请的正确姿势:带着具体参数申请、横向多档对比、到手做 6 项实测、确认后锁 Bin 留样。样品阶段花三天,量产阶段省三月。

弘呈光电全系列指示灯珠支持免费样品申请(常规 50-100 颗/款,1-2 天寄出),随样提供分光分档数据表。申请方式:139 2571 4318(微信同号),sales@led-hc.com,或直接报"封装+颜色+亮度+数量"即可。

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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.