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Thin-film, high-pixel camera phones are booming, which will stimulate the surge in demand for LED flash lamps. In order to seize market opportunities, LED suppliers will introduce higher brightness and higher drive current products this year; LED driver IC manufacturers will compete to publish small sizes. White LED driver IC solution with high current withstand and high conversion efficiency.
This year, the world's top five mobile phone manufacturers such as Motorola, Sony Ericsson, Nokia, etc. all over the same code to launch high-pixel camera phones, and the occasion of the eight-megapixel camera phone hot battle In April, Sharp won the battle and released the industry's first 10 million-pixel camera phone to cast a blockbuster for the industry. It is worth noting that in addition to Sony Ericsson's consistent use of traditional xenon lamps, Motorola, Nokia, Sharp, and Le Mobile phone suppliers such as Gold (LG) have launched light-emitting diode (LED) flash camera phones.
As mobile phone manufacturers continue to introduce high-pixel camera phones, and the thin-film appearance is the trend of the times, LED flashlights are widely favored by mobile phone manufacturers. In addition, compared with the traditional Xenon flash lamp, the LED flash has the characteristics of energy saving, fast charging and long-time lighting. Therefore, it can also support the lighting source for mobile video recording, and the potential development has great potential. In view of this, in order to seize the business opportunities of LED flash camera phones, LED components and LED driver IC manufacturers have also launched layout.
Philips Lumileds plus code LED flash market
LED flash has become the main product line of Philips Lumileds, optimistic about the potential potential of LED flash. Recently, Philips Lumileds has added a new generation of LUXEON Flash series LED products, emphasizing higher brightness and high driving current. It is expected to be officially completed by the end of this year. Mass production.
Philips Lumileds lighting product manager Michel Zwanenburg said that the megapixel camera phone has become the trend, and the company's latest LUXEON Flash series LED drive current can reach the market requirement of 1 amp, and the maximum drive current can be as high as 2.5 amps. .
With the thin-film, 10 megapixel camera phone popular, the use of higher brightness LED flash is imperative, so Korean mobile phone manufacturers have begun to launch a 1,000 mA drive current LED flash camera phone, the future LED flash design will Faced with more stringent challenges, in addition to high-brightness and high-drive current LEDs, Zwanenburg believes that power conversion efficiency and power management will be the key to two design challenges for LED flash solutions with 1,000 mA drive current.
In addition, Zwanenburg analyzed that in the future, high-power LEDs will require a larger heat dissipation area for heat dissipation purposes. For this reason, LED flash lamps will be developed toward larger sizes, but at the same time, the market must be compatible with the color accuracy and consistency of LED light sources. Claim.
Not only LED manufacturers, but also aiming at the emerging LED flash camera phone market opportunities, LED driver IC manufacturers have already prepared for and ready to go.
Camera mobile phone business shows that driver IC manufacturers are doing their best
Yu Zhengde, market manager of analog/power and MEMS components of STMicroelectronics, believes that white LED flashlights will have a better chance of becoming mainstream than RGB LED flash.
Thin-film, 10-megapixel camera phones are on the rise, driving LED flash driver IC market demand, while savvy LED driver IC manufacturers have pioneered small-size, high-current-resistance and high-conversion-efficiency white LED driver ICs. Seize the market opportunity.
Compared with traditional xenon lamps, LED flashlights have the advantages of energy saving and thinning, which makes it increasingly popular to replace xenon lamps as mainstream solutions for camera phones. Yu Zheng, STMicroelectronics (ST) Analog/Power and MEMS component product marketing manager, stressed that although the brightness of Xenon flash lamps is still much higher than LED flash at this stage, the drawbacks of poor power conversion efficiency have gradually failed to meet the needs of mobile phone manufacturers. Strict requirements for battery life. In contrast, the improvement of LED brightness is progressing rapidly, and it has both energy saving and miniaturization characteristics, and there is a great opportunity to stand out in the future.
In addition to the better characteristics of the components themselves, the LED flash is also much simpler in design. Traditional xenon flash lamps use high-voltage switch components of insulated gate bipolar transistors (IGPT) that generate high voltage on printed circuit boards (PCBs), so designers must take many insulation measures, resulting in increased design complexity; in contrast, LEDs are the highest With an operating voltage of only 4 volts, it is a low voltage drive that greatly simplifies design.
In view of the trend of light and thin, high-definition and high-resolution camera phones, power chip vendors including STMicroelectronics, National Semiconductor (NS), Analog Devices (ADI) and ON Semiconductor have been launched to have small size and high size. LED flash drive IC solution with current resistance. Among them, ST's solution is packaged in a thin fine-pitch ball grid array (TFBGA) package. In June this year, ON Semiconductor released the first 3.5 mm × 3.5 mm × 0.55 mm using a micro quad flat no-spin package (μQFN). 10 amp capacitor LED flash driver IC; July National Semiconductor (NS) and ADI have introduced less than 23 mm × 23 mm, 1.2 amps and 12 developed by Micro SMD package -ball Wafer Level Chip Size Package (WLSCP), 500 mA LED Flash Driver IC.
In addition, in order to achieve the purpose of adjusting the brightness, currently all LED driver IC suppliers have built-in internal integrated circuit (I2C) interface in the LED flash driver IC. Experts say that today's dimming is possible through Pulse Width Modulation (PWM), General Purpose Input Output (GPIO) and I2C. I2C also supports microcontrollers (MCUs) for more flexibility, such as using a flashlight as a flashlight. Wait.
According to the market analyst Strategy Analytics, even though the overall LED output value of the mobile phone market will decline year by year, the compound annual growth rate (CAGR) of LED flash lamps in 2006-2011 is still as high as 23%. In addition, it is estimated that by 2011, about 82% of mobile phones will have built-in camera functions, and the proportion of camera phones with more than two megapixels will be as high as 68%, which will help drive LED flash demand to rise. It is foreseeable that with The pixel of the camera phone is constantly upgrading rapidly. In the future, the LED flash will inevitably be connected with the traditional xenon lamp in the camera phone market, and the competition in the market will be fierce. (Text: Lin Yuanqing Editor: Xiaoyao)
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