Finally still sold! Recently, Royal Philips announced that it has signed an equity transfer agreement to sell 80.1% of Lumileds' shares to certain funds managed by Apollo's global management company subsidiary. Philips will retain the remaining 19.9% ​​stake in Lumileds.
Does the sale of Lumileds mean that CSP LED technology is also easy to change? As a senior "striker" of CSP LED technology, I will not talk about CSP today. Looking back on the past, CSP has been launched by Lumileds for almost ten years. It has always been the initiative of foreign giants, and now domestic companies have also taken off.
Today, LEDinside has about the domestic mass production of the company, Zhao Hai, deputy general manager of Zhaochi Energy, to talk about CSP, in addition to the flash market that has been introduced, the trend of the next few markets.
First, breaking the pain point of the straight-down "thickness", the penetration rate of CSP high-end market is rising
â–² backlight device trend
Under the trend of continuous reduction of cost by panel manufacturers or TV brand manufacturers, direct-type TV backlight technology has gradually reduced the market share of TVs because it can reduce the number of LEDs used and further reduce the cost of backlights. However, the direct-lit backlight TV has always been a pain point because of its thicker influence on appearance.
However, with the introduction of CSP, these pain points are gradually solved, and the power of the CSP can be made larger, which not only further reduces the cost of the direct-lit backlight type, but also can be made thinner.
According to Zheng Haibin, deputy general manager of the domestic CSP mass production enterprise Shenzhen Zhaochi Energy, LEDinside said that the current CSP energy-saving CSP has been used on a large scale in the backlight field, and is increasing the layout lighting field.
Zheng Haibin also revealed that the current CSP LED is still used in high-end brands, because the price is still relatively high, but the main reason for this cost is on the chip side. At present, the yield of the chip end is not very high, which is the main reason for the high cost.
For the packaging company, the price of the product is limited by the chip end and can not compete with the current LED products, but it is innate advantage for the high-end backlight market. Compared with the previous backlight module, the direct-down type and the side-in type cannot be compared with the thin and light, but the arrival of the CSP breaks the existing balance and makes the high quality and low price possible. This is also the current take-off for the CSP in the backlight field. the reason.
Second, the lighting market has just started, the future will be in the light engine and intelligent lighting
â–² CSP LED lighting circuit
Because the CSP size is small, the flexibility of the luminaire design is increased, and it is considered to be the development trend of miniaturization and high brightness of LED lighting. However, the application of CSP in lighting is different from that of backlight. The cost of lighting is completely different from that of backlight module in the whole application.
Zheng Haibin said that the cost of CSP relative to the entire TV is the difference between tens and thousands. But when it comes to lighting applications, it is a problem with dozens of pieces and a few pieces, and the order of magnitude has changed. Therefore, the CSP lighting application is not simply a CSP chip, but more integration is a module to help the application side do some of their processes to improve the added value of the CSP.
But why does the packaging company's CSP lighting road not take the LED old road?
First of all, the size of the CSP is too small. For the patching process, it is not the work that the lighting manufacturer can do easily;
Secondly, if you want to do a good job, the investment is bigger than the previous investment in the placement machine. Of course, it is not a big investment for these big factories in Fozhao, but there is a great investment for small and medium-sized lighting companies. risk;
Third, for the packaging factory, because the CSP SMT operation requires a special packaged solid crystal machine to accurately locate, otherwise the application plant's SMT equipment can not reach the chip-level SMT accuracy.
In addition, one thing is that if the packaging company has done this module and even the light engine in the future, the lighting application field will evolve into a light asset lighting design enterprise and an OEM enterprise. In addition to the lighting design, the lighting design also extends the design of the single product lighting scheme, such as intelligent lighting, smart home and other marginal lighting design companies.
Third, the small pitch market is hot, and the technology is over-represented, but Micro LED has come
Compared to backlighting, no one has seen CSPs used on displays, but there are many that can be seen as non-spaced COB displays. A recent senior person in the display industry told LEDinside that there are already many cases of COB displays, and the response is good.
According to reports, the COB display is to package the LED on the PCB, because the heat is directly radiated through the PCB, the heat is easily dissipated, and it will hardly cause serious light attenuation, so there is very little dead light, which greatly extends the life of the display. .
The traditional surface-mount LED product chip is fixed in the cup, not directly in contact with the PCB board, mainly through the gel and the four pads to dissipate heat, the heat dissipation area is small, the heat will be concentrated on the chip, causing serious light attenuation for a long time. Even the dead light phenomenon reduces the service life and quality of the display.
But now the COB display is equipped with a LED structure. If you import a flip chip or a CSP, this will not only raise the heat and higher reliability, but it will not be used. It is obviously a cost issue. .
Can the CSP cut into the display? In fact, from this LEDinside visit to Zhaochi Energy Zheng Haibin heard that the CSP module will take the COB route, there will be no single repair rework but a direct retirement view can be seen, CSP module reliability stability and COB Like the package, it is controlled on the previous process rather than on the back end.
In this way, CSP can be used as a lighting module. Is it possible to directly make a display module in a packaging enterprise? This problem requires display companies and packaging companies to discuss together. Online Jun has a suspense here.
Whether a technology is good or not, each company has a different view. For example, some people say that the current small-pitch display technology is over-extended, and it makes little sense. However, when I want to think about it from the CRT to LCD and OLED, there seems to be no technology that has been eliminated because the display is too perfect, so don't underestimate people's greed for visual pursuit.
When the display field is still pursuing the trend of LED pixelization, is the current small-pitch display technology really surplus? Online Jun thinks that it may be question mark.
â–² LED display device route
Fourth, the penetration rate of CSP vehicle after-loading market is improved, and the front-loading market still needs internal strength.
LEDinside related research report pointed out that the development of domestic low- and medium-power LED applications is relatively mature. At present, the development is still to introduce LEDs with price considerations. At present, in-vehicle lights and taillights are similar in terms of specifications and illumination or backlight, so the proportion of imports is relatively high. As for the relationship between DRL and vehicle identification, it has developed rapidly in China in recent years. Some Chinese automakers have switched to low-power LEDs to introduce DRL applications. Therefore, China's DRL penetration rate has reached 47% in 2016. However, due to the high technical threshold of high-power High/Low Beam and fog lamps, the application of medium and high power LEDs is slow, and the main sources are still dominated by international manufacturers, so the penetration rate is still very low.
As far as the device itself is concerned, current device suppliers are dominated by major international companies such as OSRAM, Nichia, and Lumileds, and most of their front-mounted vehicle headlights use their devices. Domestic companies mainly seize the market share of the aftermarket. Although Dachang has a large market share in the automotive lighting market, many CSP manufacturers' products are still in the aftermarket. Among them, CSP is taken as an example, and it is driven into the aftermarket through CSP.
Regarding the specifications of LED devices in the automotive lighting front-loading market, Li Gang of Shenzhen University Nanshan Industrial Technology Research Institute said that the front-end headlights are mainly used in the 2016-LED originally designed for flash. And in order to ensure that it has sufficient light efficiency under high power conditions, good thermal conductivity and can control the illumination angle within 120 °, 2016-LED adopts large-size flip-chip, vertical or film flip chip plus ceramic. Substrate packaging technology.
However, regarding CSP, Li Gang said that although it is also applied to LED headlights, because the fluorescent layer on CSP-LED is three-dimensionally wrapped around the flip chip, the adhesion is relatively poor, during the die bonding and reflow process. Any mechanical collision, tinning effect and difference in thermal expansion coefficient will cause the fluorescent adhesive layer to fall off from the flip chip and fail. It is considered to be unsuitable for making highly reliable automotive headlights, but there are still many companies' CSP products. Front loading market.
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