GEORGE TOWN, USA: O2Micro International Ltd, a leading supplier of innovative power management and security components, was issued 35 claims under United States patent number 7,550,928 for its Driving Circuit for multiple Cold Cathode Fluorescent lamp (CCFL) applications.
O2Micro’s patented driving circuit is a cost-effective solution for large-size LCD panels containing multiple CCFLs. It can be adapted to convert high voltage Direct Current-to-Alternating Current (DC/AC) signals for LCD TV and Monitor applications.
Dr. Yung Lin, executive vice president, O2Micro, stated, “This invention reduces backlight module cost by allowing the designer to utilize low cost transformers, while maintaining system reliability.”
Founded in April 1995, O2Micro develops and markets innovative power management, and security components for the computer, consumer, industrial and communications markets. Products include Intelligent Lighting, Battery Management, Power Management, and SmartCardBus products.
O2Micro International maintains an extensive portfolio of intellectual property with 12,700 patent claims granted, and over 15,000 more pending.
Showing posts with label CCFL. Show all posts
Showing posts with label CCFL. Show all posts
Monday, August 31, 2009
Friday, July 31, 2009
LED backlight penetration in LCD TVs to grow to 40pc in 2013
AUSTIN, USA: The LED backlight market has rapidly emerged in the TFT LCD industry and is expected to continue growing for the next five years, according to DisplaySearch’s latest Quarterly LED & CCFL Backlight Report.
Specifically, DisplaySearch forecasts the penetration rate of LED backlights for LCD TVs to grow from less than 3 percent in 2009 to 40 percent in 2013 and surpass CCFL backlights in 2014 with more than 50 percent penetration rate.
Meanwhile, large-area LED backlight shipments for all applications will grow from 84.9 million units in 2009 to 434.8 million units in 2013, when LED backlights will be used in 54.3 percent of 10”+ TFT LCD panels. Thus, LED backlights will become mainstream in the TFT LCD industry.
While LED backlights for LCD TVs are growing rapidly, notebook PCs are the leading application for large-area LED backlight units. DisplaySearch forecasts that 100 percent of all new notebook models will have LED backlights by 2012. Fig. 1 shows the large-area LED backlight penetration in each application.
Fig. 1: Large Area LED Backlight Unit Penetration Rate by Application
Source: DisplaySearch Q2’09 Quarterly LED & CCFL Backlight Report
Backlight units for LCD TV are expected to be the next growth opportunity for the LED industry, with leading brands such as Samsung, LG, Sharp and Philips all expected to mass produce LED backlit LCD TVs in 2010. As a result, LED backlight units for TVs will grow to 3.6 million units in 2009 and 15.1 million units in 2010.
Companies like Samsung are focusing on the development of edge-lit LED backlights, which can reduce the bill of materials by 30-40 percent compared to direct-lit models. “Edge-lit LED backlight units for LCD TV are a temporary solution to drive costs down to open market acceptance for ‘LED TV’ as short-term marketing strategy,” noted Luke Yao, DisplaySearch Research Director.
“Consumers want a low-cost solution with acceptable picture quality, but aren’t always willing to pay a higher premium—making edge-lit LEDs an ideal near-term solution.”
For the monitor segment, cost and performance remain bottlenecks for panel manufacturers creating LED backlit monitors. Taiwanese panel makers like AUO and Innolux have been the most aggressive in developing LED monitor panels.
Since LED monitor panel sizes (18.5”W, 21.5”W, 23.6”W and 24”W) are also used for TV, DisplaySearch refreshed its forecasted penetration rate for LED monitor backlight units to 21 percent in 2013.
Currently panel makers are putting efforts into shrinking the LED backlight premium to $3-5 for 18.5”W panels. From 2010, we expect that LED backlight monitors will be developed and supported by brand name makers.
Specifically, DisplaySearch forecasts the penetration rate of LED backlights for LCD TVs to grow from less than 3 percent in 2009 to 40 percent in 2013 and surpass CCFL backlights in 2014 with more than 50 percent penetration rate.
Meanwhile, large-area LED backlight shipments for all applications will grow from 84.9 million units in 2009 to 434.8 million units in 2013, when LED backlights will be used in 54.3 percent of 10”+ TFT LCD panels. Thus, LED backlights will become mainstream in the TFT LCD industry.
While LED backlights for LCD TVs are growing rapidly, notebook PCs are the leading application for large-area LED backlight units. DisplaySearch forecasts that 100 percent of all new notebook models will have LED backlights by 2012. Fig. 1 shows the large-area LED backlight penetration in each application.
Fig. 1: Large Area LED Backlight Unit Penetration Rate by Application
Source: DisplaySearch Q2’09 Quarterly LED & CCFL Backlight ReportBacklight units for LCD TV are expected to be the next growth opportunity for the LED industry, with leading brands such as Samsung, LG, Sharp and Philips all expected to mass produce LED backlit LCD TVs in 2010. As a result, LED backlight units for TVs will grow to 3.6 million units in 2009 and 15.1 million units in 2010.
Companies like Samsung are focusing on the development of edge-lit LED backlights, which can reduce the bill of materials by 30-40 percent compared to direct-lit models. “Edge-lit LED backlight units for LCD TV are a temporary solution to drive costs down to open market acceptance for ‘LED TV’ as short-term marketing strategy,” noted Luke Yao, DisplaySearch Research Director.
“Consumers want a low-cost solution with acceptable picture quality, but aren’t always willing to pay a higher premium—making edge-lit LEDs an ideal near-term solution.”
For the monitor segment, cost and performance remain bottlenecks for panel manufacturers creating LED backlit monitors. Taiwanese panel makers like AUO and Innolux have been the most aggressive in developing LED monitor panels.
Since LED monitor panel sizes (18.5”W, 21.5”W, 23.6”W and 24”W) are also used for TV, DisplaySearch refreshed its forecasted penetration rate for LED monitor backlight units to 21 percent in 2013.
Currently panel makers are putting efforts into shrinking the LED backlight premium to $3-5 for 18.5”W panels. From 2010, we expect that LED backlight monitors will be developed and supported by brand name makers.
Wednesday, July 29, 2009
Himax white LED drivers for netbook/notebook apps
TAINAN, TAIWAN: Himax Technologies Inc. announced that its white LED (Light-Emitting Diode) driver, the HA7305, has been approved by TFT-LCD panel makers for use in netbook and notebook applications and is expected to commence mass production at around the end of third quarter 2009.
HA7305 is ideally for netbook and notebook panels with LED-backlighting. LED has merits of lower power consumption, low environmental impact and further enables small form factor electronic products. Recently, the continuous cost-down of white LEDs has triggered the fast adoption of LED backlights in numerous mid- to large-sized panel applications.
According to Topology Research Institute, it is estimated that around 60 percent of netbooks and notebooks shipped worldwide in 2009 are adopting white LEDs as backlights. Furthermore, white LEDs are expected to replace CCFLs (Cold Cathode Fluorescent Lamps) completely in netbook and notebook applications in the next two years.
Himax's white LED drivers were developed by Himax Analogic, Inc., a Himax subsidiary focusing on analog semiconductor solutions. The HA7305 is a white LED driver with 4.5V to 24V input voltage range and up to 44V output voltage; it drives up to 80 LEDs at 90 percent efficiency.
The built-in LED balance control circuitry offers stable and uniform current in and between channels with less than 3 percent inaccuracy. Moreover, the HA7305 embeds patented PWM (Pulse Width Modulation) dimming control technology and protection features including over voltage, over current, over temperature and under voltage lockout protections.
Following the previously launched white LED drivers for smaller panels, HA7305 presents a milestone for Himax's white LED driver line to penetrate into larger panels, namely netbook and notebook applications. Looking forward, Himax expects to launch an integrated white LED driver with power management function at around the end of 2009, and will continue to expend its white LED driver offerings suitable for monitor and TV applications.
Jordan Wu, President and CEO of Himax, commented: "Himax offers display related semiconductor solutions to meet customers' different needs. With Himax's worldwide leadership in LCD drivers and broad customer base, we believe white LED drivers will become one of Himax's major non-driver products in the future."
HA7305 is ideally for netbook and notebook panels with LED-backlighting. LED has merits of lower power consumption, low environmental impact and further enables small form factor electronic products. Recently, the continuous cost-down of white LEDs has triggered the fast adoption of LED backlights in numerous mid- to large-sized panel applications.
According to Topology Research Institute, it is estimated that around 60 percent of netbooks and notebooks shipped worldwide in 2009 are adopting white LEDs as backlights. Furthermore, white LEDs are expected to replace CCFLs (Cold Cathode Fluorescent Lamps) completely in netbook and notebook applications in the next two years.
Himax's white LED drivers were developed by Himax Analogic, Inc., a Himax subsidiary focusing on analog semiconductor solutions. The HA7305 is a white LED driver with 4.5V to 24V input voltage range and up to 44V output voltage; it drives up to 80 LEDs at 90 percent efficiency.
The built-in LED balance control circuitry offers stable and uniform current in and between channels with less than 3 percent inaccuracy. Moreover, the HA7305 embeds patented PWM (Pulse Width Modulation) dimming control technology and protection features including over voltage, over current, over temperature and under voltage lockout protections.
Following the previously launched white LED drivers for smaller panels, HA7305 presents a milestone for Himax's white LED driver line to penetrate into larger panels, namely netbook and notebook applications. Looking forward, Himax expects to launch an integrated white LED driver with power management function at around the end of 2009, and will continue to expend its white LED driver offerings suitable for monitor and TV applications.
Jordan Wu, President and CEO of Himax, commented: "Himax offers display related semiconductor solutions to meet customers' different needs. With Himax's worldwide leadership in LCD drivers and broad customer base, we believe white LED drivers will become one of Himax's major non-driver products in the future."
Friday, May 22, 2009
MOSFET H-bridges optimize DC fan and inverter designs
DALLAS, USA: Diodes Inc., a leading global manufacturer and supplier of high-quality application specific standard products within the broad discrete and analog semiconductor markets, has announced a range of four H-bridge MOSFET packages that are set to dramatically simplify DC fan and Cold Cathode Fluorescent Lamp (CCFL) inverter circuits by reducing both component count and PCB size in space constrained applications.
Two 30V H-bridges, the ZXMHC3A01N8 and ZXMHC3F381N8, are well-suited for 12V DC fan and inverter applications and offer users a choice of low RDS(ON) performance. The 60V rated ZXMHC6A07N8 and 100V rated ZXMHC10A07N8 are industry firsts and are targeted at 24V DC and 48V DC motor control circuits, respectively.
Featuring dual complementary pairs of N- and P-type MOSFETs in an SO8 package, the ZXMHC parts can replace either four discrete SOT23 packaged MOSFETs or two SO8 complementary MOSFET packages.
The proprietary packaging enables significant reductions in the PCB footprint by at least 50 percent and in overall inventory cost for a wide range of existing motor or other inductive load drives.
Two 30V H-bridges, the ZXMHC3A01N8 and ZXMHC3F381N8, are well-suited for 12V DC fan and inverter applications and offer users a choice of low RDS(ON) performance. The 60V rated ZXMHC6A07N8 and 100V rated ZXMHC10A07N8 are industry firsts and are targeted at 24V DC and 48V DC motor control circuits, respectively.
Featuring dual complementary pairs of N- and P-type MOSFETs in an SO8 package, the ZXMHC parts can replace either four discrete SOT23 packaged MOSFETs or two SO8 complementary MOSFET packages.
The proprietary packaging enables significant reductions in the PCB footprint by at least 50 percent and in overall inventory cost for a wide range of existing motor or other inductive load drives.
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