This series features transparent LED screens, which are suitable for various indoor places and various stores, especially in storefronts with floor-to-ceiling glass windows. Installing the transparent screen against the glass wall has a very good effect. When the display is turned off, the audience can watch the indoor environment from the outdoors, and when the display is turned on, they can directly watch the content played on the display.It not only preserves the visibility in the store, but also can effectively display advertising videos to the other party, which is very practical.
Transparent Led Screen,Led Wall Display,Building Led Display Panel,Sport Led Screena Guangzhou Cheng Wen Photoelectric Technology Co., Ltd. , https://www.cwdisplay.com
The LM2755 driver chip is available in a small, slim microSMD package that provides multi-band backlighting for three independent red, green, and blue LEDs, or white indicator LEDs controlled by a programmable pattern generator. The chip is not only programmable, but also has multi-level light and dark control and an I2C compatible interface, so it can flexibly meet customers' needs for various multimedia functions, such as games and mobile TV.
The LM2757 is also available in a microSMD package that requires only four small ceramic capacitors, so the overall solution does not exceed 12 square millimeters. The chip can output very high current and can select the output voltage through the pin, which can be used to illuminate peripheral devices without an inductor, such as backlighting the keypad. The LM2757 chip also provides regulated power to USBOn-The-Go peripherals.
National's LM4510 is a synchronous high-voltage boost regulator that supports organic light-emitting diode (OLED) displays, which are thinner and consume less power than liquid crystal displays. The chip is available in a small LLP package and is up to 85% efficient, extending battery life.
Price and availability
The LM2755 and LM2757 chips are priced at $1.50 each, while the LM4510 chip is priced at $1.80 each. All three chips are priced at 1,000 units and are available in volume. ( Original link) 
National Semiconductor pushes 3 PowerWise chips
Introduction: National Semiconductor Corporation (National Semiconductor Corporation) announced that the company's PowerWise series of energy-efficient chip product line has added three new power management products, namely LM2755 light-emitting diode (LED) driver, LM2757 non-inductive switched capacitor boost regulator And the LM4510 high voltage boost regulator. These three compact new products can drive LEDs and organic light-emitting diode (OLED) displays, making them ideal for portable multimedia devices. In addition to extending the battery life of the system, they also support a new generation of visual effects.