P1

Organized by:

Hong Kong Certification Centre (HKCC)

香港認証中心Speaker: Raymond Yue Certification and Surveillance Manger

IRCA QMS auditor

財經透視 一片光明？ 2013-10-20 18 時 00 分

財經透視 一片光明？ 2013-10-20 18 時 00 分

LED Advantage

• Light of the desired color • Turn on instantly • Solid epoxy lens case , non destructive• No sudden burn out but …. dimming• Long life span 長效能

Product conformity certification scheme for LED lighting products, HKEIA

• Scheme owner – HK Electronics Industries Association (HKEIA), a voluntary scheme in Hong Kong

• Scheme open to : government bodies, manufactures, retailers, users….

• Current major users:,

• Operate under

ISO/IEC 67-System 5 certification module

Product certification system ISO/IEC Guide 67 - System 5 of product certification system

Initial testing Surveillance for every 12 months samples from open market or supplier’s stock or both

Factory assessment production process and quality system

- 市場 / 工廠取得樣品 - 生產與品質系統的後續監督其持繼的符合性

型式測試 生產 與品質系統評估＋ ＋

Certification Scheme for LED Lighting

Three technical Criteria covered• Safety IEC 60598-1 Luminaires -General safety IEC62471 Photobiological safety

• EMCCISPR 15 / EN 55015IEC 61000-3-2IEC 61000-3-3Surge immunity test

• Performance IES LM-79,IES LM-80, and IES TM -21, Thermal test

Certification Scheme for LED Lighting

Surveillance assessment once 12 month• consists of the assessment of the production process, QMS• testing of samples from the factory or the open market, or

both Purpose1. Ensure production process in consistency manner2. Ensure correct and consistent use of certified components

materials, construction , etc.3. Measurement on lighting output, color temperature, color

rendering index and output lumen (IES LM-79)4. Continuous conformity 持續符合性

Certification Scheme for LED Lighting

Product Scope in the Scheme :

LED Bulk-head LED Flood lightLED Down light

Enemy of all LEDs • LED (semiconductor diodes, electronic devices that permit current

to flow in only one direction, the p-n junction temperature)

• The majority of LED failures are caused by excessive or long-term high temperature. Elevated junction temperatures can cause a reduction in light output, degradation of chromaticity 色 度 ,

performance, life expectancy, and reliability

• Enemy of all LEDs – Heat

Drive current If• Operating LEDs at higher than recommended rated

currents, the long-term performance of degradation (lumen maintenance )by creating higher junction temperature

Overdriving impact on lumen maintenance

(2003, Rensselaer Polytechnic Institute )

Drive current If

• As the forward current is reduced (red line progressing to the blue line), the light output of an LED increase (If= forward current)

The relationship between forward voltage and current of LEDs

Junction temperature

Doubling the junction temperature of an LED from 75C to 150C can shorten its life by 73%. Elevated operating temperatures will reduce the light output for a given forward current and operating ambient temperatures

(courtsey of CREE)

(115,000-30,000)hr =73% shorten

Typical LED package

Rthermal j-air thermal resistance between the junction and ambient

Mathematical Model Tj = TA + (Rthermal j-a Pd)

Tj = Junction temperature (°C)

TA = Ambient temperature (°C)

Rthermal j-air = Thermal resistance between the LED junction and ambient = Tc + Tb + Tth (°C/W)

Pd = Power dissipated by LED = Forward voltage

x Forward current (Vf x If)

Junction temperature

• Cooler LEDs produce more light than hotter LEDs

• Use recommended package through data sheet

• Airflow• Thermal management is able to control the

junction temperature

Thermal test at 40C and humidity at 98% temperature measurement on:(a) LED junction within the module or array(b) Casing temperature of the LED driver

Certification Scheme for LED Lighting － Performance requirement －

ISO/IEC guide 67:2004

Product Certification 產品認證 Product certification is an activity by which a

third party gives written assurance that a product(including process and service) fulfils specified requirements.

•

鏗鏘集 識食有機 2013- 6- 17 http://www.youtube.com/watch?v=9lS4HN0ZqWM @13.07@18.50

Consumer

Supplier

Supplier

Consumer

HKCC_ 協助建立信心產品 (- 香港貿發局 )

Endorsement of manufacture-ability: of the product maintainability, construction,

material and component use such that the quality of the product based on internationally established standards ISO standards HKCC- 協助建立信心產品 (- 香港

貿發局 )

Product differentiation will stand out:•Acceptance by the market and contribution to achieve national legal compliance, and regional/international trade obligations － ISO Regional workshop on Certification, India 2004

•Bears out those societal significant concerns e.g. safety, health or environmental protection

－ ISO/IEC Guide 67:2004

鏗鏘集 識食有機 2013- 6- 17

Thank you

Certification enquiry :www.hk-cc.hk 電 : 2661 2083 (

趙小姐 )

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