New SSL technology of LED driver display to improve image quality and reduce energy consumption

Although the actual LED in general lighting applications get more attention, but the largest market is still the high brightness LED LED backlit display. From Taos, Supertex and iWatt's new LED driver and sensor products to ensure that the latest SSL technology with the best image quality and minimum energy consumption.

Actually light sensor and proximity sensor is a device for driving system for liquid crystal display, it can display in the surrounding light or without watch automatically select the appropriate display backlight brightness so as to achieve the best quality in power at the same time.

Supertex 6 channel driver

Supertex also launched a new 6 channel HV9957 LED driver for battery powered mobile devices. Moreover, the new driver can provide fault protection function when the temperature is too high, the current is too large, the voltage is too high or too low.

"By providing superior fault protection features, the HV9957 driver provides manufacturers with the ability to handle complex faults in a separate LED lamp string with precise LED drives. Supertex StephenLin, vice president of marketing, said, HV9957 also has advanced digital circuits, which can provide frequency control function, fault protection function and phase dimming function. In today's LED backlight driver, these features make the low duty cycle and high dynamic range controllable. "

For precise control of each LED lamp string, the HV9957 integrates a boost converter switch and six independent low dropout linear regulators (LDO). The driver circuit is capable of providing a current of 30 Ma for each LED lamp string, which is a typical battery powered design pattern.

Although Taos hopes to be able to use its new TSL2x72 series of computer monitors and high-definition LCD TV, but the TSL2x72 family of products mainly for smart phones, tablet PCs and other mobile devices.

Taos's new products include TSL2572 series of digital ambient light sensor (ALS), TSL2672 series proximity sensors and also includes a light sensor and proximity sensor TSL2772 series. In order to meet the needs of mobile devices, sensors must be able to work under strong light. To meet this demand, Taos company's new product design can still normally used in sufficient sunlight to reach or exceed 60000 lux ambient brightness under. Taos company marketing director JerryKoontz said: "mobile device vendors continue to provide more convincing products to improve the user experience, so they need for light detection and short distance detection solution, which can work in a wide range of lighting conditions. "

The Taos uses a programmable signal gain mode, including a low gain, which improves the dynamic range of the optical sensor. At the same time, Taos company to improve the signal to noise ratio, and the use of interference compensation technology, which provides more accurate proximity detection. These two types of detectors are able to remain in sleep state can still be used sporadically, thereby reducing energy consumption to a minimum. This function is particularly important in battery powered equipment.

The sensor is capable of detecting any type of light source, including almost all of the light, including a fluorescent lamp. In addition, the structure of the dual diode also ensures that even after the installation of the glass, the probe light may be distorted in the case of glass, the detector can also get accurate results.

IWatt 32 channel driver for TV

IWatt uses a 32 channel iW7032 type LED driver for their side light (edgELit) LED backlit HD LCD TV and direct down (directlit) LED backlit HD LCD TV designed with different solutions. The driver uses a technique called adaptiveswitching (iWatt), which reduces the energy consumption and operating temperature of the device. IWatt, senior vice president of GyanTiwary said: "the driver gathered off a LED chip through the heat problem, overcome this difficulty, our engineers have made great contribution to the dynamic backlight lighting industry to reduce the cost of. "

The adaptive switching technology can detect the different LED lamp string with different forward voltage, and adjust the driving current of each lamp string individually. The company propaganda, this technology can make the driver energy consumption is lower than the company's competitive products 2-5 watts. The adaptive switching technology can prolong the lifetime of LED components in order to achieve the purpose of saving energy and reducing heat generation.

A iW7032 driver chip can drive a total of 480 LED chips by up to 56 volts. The driver also incorporates a field effect transistor to control the output current of each lamp string. In order to control the brightness of the LED lamp string, the integrated circuit of the driving chip supports three different pulse time modulation (PMW) schemes with 10 bit intervals.

US market research company Strategies Unlimited drive market prediction

According to the latest report by the U.S. market research firm StrategiesUnlimited, LED drive market is an important segment in the LED market. The research company (such as LED magazine (LEDsMagazine), a division of Payne group's forecast, the market will drive) from US $2 billion in 2010 increased to $3 billion 500 million in 2015 StrategiesUnlimited company that display backlighting applications will dominate the LED market by 2015. But at the same time, the company also predicted that ordinary lighting will become the main market for LED and related technologies, is the driver of the city