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The status and application of LED encapsulation adhesives

Update: 2021-1-12  

      LED产品作为皇冠上的明珠,已广泛地应用在指示、背光、显示、照明等应用方向,应用领域涵盖消费类电子业、汽车业、广告业、交通业、体育业、娱乐业、建筑业等全方位领域。而LED封装作为上游产业,更是重中之重,决定了使用寿命和透光程度。

As the jewel in the crown, LED products have been widely used in indications, backlight, display, luminaire and other applications. The application fields cover consumer electronics, automotive, advertising, transportation, sports, entertainment, construction and other all-round areas. As an upstream industry, LED encapsulation is the top priority, which determines the service life and the degree of light transmission.



LED封装胶概况/LED Encapsulant Overview


LED(Light Emtting Diode)全称发光二极管,是一种可以将电能转化为光能的半导体材料。

LED (Light Emitting Diode) stands for light-emitting diode, which is a semiconductor material that can convert electrical energy into light energy.


     LED 封装技术目前主要往高发光效率、高可靠性、高散热能力与薄型化4个方向发展,主要的亮点有硅基LED、板上芯片封装(COB)技术、复晶型LED芯片封装、高压LED等。在这些封装形式中,相应的材料也各不相同。

LED encapsulation technology is currently mainly developing in four directions: high luminous efficiency, high reliability, high heat dissipation capacity and thinning. The main highlights are silicon-based LED, chip-on-board (COB) technology, polycrystalline LED chip encapsulation, high-voltage LED, etc. In these encapsulation forms, the corresponding materials are also different. 


      LED封装胶是LED封装材料的总称,俗称LED胶水。之前,LED封装胶的成分主要是普通环氧树脂,但因其耐热、耐紫外能力较弱以致于胶体容易变黄,影响透光效果,而脂环族环氧树脂因具有耐高温、耐紫外老化等优异性能,已经在高端的产品应用上取代了环氧树脂。

LED encapsulation adhesive is also called LED encapsulant or LED adhesive. Previously, the main component of LED encapsulant was ordinary epoxy resin, but because of its weak heat and UV resistance, the gel easily turns yellow and affects the light transmission effect. Cycloaliphatic epoxy resin has high temperature resistance, strong UV resistance and excellent anti-aging properties, etc. Thus it has replaced ordinary epoxy resin in high-end product applications.


LED封装胶发展历程/LED Encapsulant History


1960s-1980s 以GaP、GaN为基础的LED研究获得突破GaP, GaN-based LED research has achieved breakthroughs
1993  LED全彩化由日亚化工实现 LED full color is realized by Nichia Chemical.
1998  SMD LED封装工艺出现SMD  LED encapsulation technique appeared.

2008 出现COB封装工艺 COB encapsulation technique appeared.
2013 出现基于Flip Chip的无引线封装 Flip Chip-based leadless encapsulation appeared.


LED封装胶产业分析/LED Encapsulant Industry Analysis


上游 Upstream Industry

封装材料:有机硅、环氧树脂、PCT

Encapsulation materials: organic silicon, epoxy resin, PCT

LED芯片制造  LED chip manufacture


中游 Midstream Industry

LED封装 LED encapsulation


下游 Downstream Industry

液晶背光源   LCD backlight

LED显示屏   LED display

LED车灯      LED car lights

景观灯饰      Landscape lighting

特殊照明      Special lighting

交通信号灯   Traffic lights


LED封装胶行业壁垒/LED Encapsulant Industry Barriers


技术壁垒 Technical barriers

LED封装生产涉及封装材料、光学性能测试、自动化工艺技术与控制。

LED encapsulant production involves encapsulation material, optical performance testing, automated technology and control.


资金壁垒 Financial barriers

LED封装产线和设备的购置与运行需要大量资金。

The purchase and operation of LED encapsulant production line and equipment require a lot of capital.


客户壁垒 Customer barriers

产业下游LED显示屏、背光、汽车等领域客户较为集中,具有严格的供应商认证体系,认证周期长,对企业的供给能力、资金能力、研发能力要求严格。

In a downstream industry, customers are concentrated in LED display, backlight, automotive and other fields, where there are strict supplier certification system, long certification cycle, as well as strict requirements on the company's supply capacity, capital capacity and R&D capacity.


退出壁垒 Exit barriers

LED封装产业前期产线和设备投入较大。

Large investment in early production lines and equipment for the LED encapsulation industry.



 LED封装胶市场分析/LED Encapsulant Market Analysis


中国LED照明市场规模 China LED lighting market size

      中国是LED照明产品最大的生产制造国,随着国内LED照明市场渗透率快速攀升至七成以上,LED照明已基本成为照明应用的刚需,国内的LED照明市场规模呈现出较全球平均水平更快的增长势头。据统计,中国LED照明市场产值规模由2015年的2596亿元增长到2018年的4155亿元,年均复合增长率达到16.97%,增速高于全球平均水平。预计到2021年,中国LED照明市场产值有望达到5900亿元,2019-2021年仍有望能保持超过12%的年均复合增长水平。

China is the largest manufacturer of LED lighting products. With the domestic LED lighting market penetration rate quickly climbed to more than 70%, LED lighting has become a necessity in lighting application. The domestic LED lighting market size shows a faster growth momentum than the global average. According to statistics, the output value of China's LED lighting market increased from 259.6 billion yuan in 2015 to 415.5 billion yuan in 2018, with a compound annual growth rate of 16.97 percent, higher than the global average. China's LED lighting market is expected to reach 590 billion yuan by 2021. It is still expected to maintain a compound annual growth rate of more than 12% in 2019-2021.


                                    
Picture 1: Chinese LED lighting market size and growth trend from 2016 to 2021
Picture 2: Market share of global LED encapsulantsupply source from 2016 to 2019 (unit: %)


      中国大陆在近10年内承接了全球产业转移,根据LEDinside统计,2019年中国大陆在全球LED封装供给端的市占率达到71%,海外产能主要聚焦于车用照明等相对高端的市场需求,而通用照明、景观照明、LED显示和背光等传统应用大部分来自大陆供应商。

Chinese mainland has undertaken global industrial shift in the past 10 years. According to LEDinside statistics, in 2019 Chinese mainland market share on the global LED encapsulant supply source reached 71%. Overseas production capacity is mainly focused on vehicle lighting and other relatively high-end market demand. General lighting, landscape lighting, LED display, backlighting and other traditional applications mostly come from Chinese mainland suppliers.


      目前中游封装是我国LED产业发展相对成熟的环节,国内企业发挥规模优势,自2010年开始进入高速发展期,2015年后逐渐趋于平稳,但仍保持每年10%以上的增速。根据高工LED预测数据,2018年国内LED封装产值超过1000亿元,而2020年预计达1288亿元。

At present, the midstream encapsulant industry is a relatively mature link in the development of China's LED industry. Domestic enterprises play the scale advantages. Since 2010 they have begun to enter a period of high-speed development. After 2015 they gradually leveled off, but they still maintain an annual growth rate of more than 10%. According to the forecast data of Gaogong LED, the output value of domestic LED encapsulation will exceed 100 billion yuan in 2018, while it is expected to reach 128.8 billion yuan in 2020.

Picture 3: LED encapsulant cost




LED封装胶行业发展趋势
/LED Encapsulant Industry Development Trend


      国内LED封装材料在研究和应用上都与国外尚有一定的差距。高折光的封装材料的产品虽然已进入市场,但由于在可靠性方面存在的问题,无法在高质量要求的LED器件上得到应用。高端封装材料的市场基本上被国外大公司的产品所垄断。国内所研制或生产的材料和国外产品相比还存在光通量偏低、粘结性差或吸水率偏高等缺点。由于几大国外企业控制对国内销售关键原料,以保持自身胶水在市场的垄断地位,国内企业需要不断解决原材料自主合成问题,打破外国公司对原料的垄断和控制,并在生产设备和工艺上自主创新,防止陷入国外企业的专利陷阱。随着市场的推动和大量企业资金的投入,技术难题将不断被研发人员解决,国内的LED封装胶材料必将赶上进口封装胶材料。

There is still a certain gap in research and application when comparing the domestic LED encapsulating materials with that of foreign countries. Although the high refractive index encapsulating materials have entered the market, they cannot be applied to high-quality LED devices due to reliability problems. The market for high-end encapsulating materials is basically monopolized by large foreign companies. Compared with foreign products, domestically developed or produced materials still have disadvantages such as low luminous flux, poor adhesion, or high water absorption. As several major foreign companies control their domestic sales of key raw materials in order to maintain their own adhesive market monopoly, domestic companies need to continuously solve the problem of independent synthesis of raw materials, break the monopoly and control of raw materials by foreign companies, and independently innovate production equipment and processes to prevent them from falling into the patent trap of foreign companies. With the promotion of the market and the investment of a large amount of corporate funds, technical problems will continue to be solved by R&D personnel, and domestic LED encapsulating materials will certainly catch up with imported encapsulating materials.




南通新纳希新材料有限公司/Nantong Synasia New Material Co., Ltd.


      脂环族环氧树脂具有优异的加工性、热稳定性、电绝缘性和耐紫外辐射等综合性能,非常适合应用在LED封装胶领域中。新纳希经过十多年的经验积累和不断地改革与创新,现已成长为一家生产经验丰富、产品质量稳定、专业的脂环族环氧树脂生产企业。一份付出,一份收获,一份信任,倍增回馈,新纳希会继续以优质的产品和服务感谢您的支持!

Cycloaliphatic epoxy resin is ideal for use in LED encapsulant due to its excellent processing property, good thermal stability, electrical insulation and strong UV radiation resistance. After more than ten years of experience and continuous reform and innovation, Synasia has grown into a specialized cycloaliphatic epoxy resin manufacturer with rich production experience and premium product quality. We fully understand that long term business is highly dependable on customer trust. Synasia will continue providing high quality products and excellent services to thank you for your support!




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