Cumulative push point correction with PWM function LED driver

Taiwan factory before the accumulation of science and technology for high order LED-display.cnLEDw.com/ ">LED display applications, launched new products MBI5040 constant current LED driver with 8 bit and 16 bit PWM digital correction function.

With the high order LED display more intense competition, strict requirements of LED brightness uniformity and color accuracy, by screening the quality of LED has been unable to meet the demand; therefore, for each LED point to point correction to enhance the LED display quality, has become a trend. Most of the current market correction approach is through the controller operation, however, this way will increase the load and limit controller can control the LED points, not only the high cost, the controller design is complex. Built in MBI5040 digital point ZhengXin function, can be individually adjusted LED brightness uniformity, and avoid the general in the correction process, LED color offset problems. In addition, through the MBI5040 direct point correction operation, but also allows the controller to focus more on image processing.

Generally, the point correction can be divided into two kinds of analog and digital methods. However, it is usually used to perform the point correction in analog mode, which can cause the problem of LED wavelength shift, that is, the problem of LED color shift. The main characteristic of MBI5040 is a 8 bit point correction through digital method, in the same visual refresh rate, the compensation of each LED to ensure that the brightness, the brightness of LED with brightness changes in our environment, still can maintain the brightness uniformity, and do not need to worry about LED color offset problems caused by point correction.

In addition, MBI5040 specially built patent protection circuit design, the gray scale data and point correction data multiplication, so in point correction, LED display does not need to sacrifice the image gray number or visual refresh rate. MBI5040 also provides 16 bit PWM functionality, and uses the -S-PWM technology to accumulate technology to effectively increase the visual refresh rate. MBI5040 has a 8 bit digital point correction and a 16 bit PWM function, and still can maintain a high visual refresh rate, so that the controller can be designed with a lower order FPGA, thus reducing the overall cost of the controller design.

Therefore, through affordable MBI5040 can make the LED display easily upgraded to a higher order LED display, especially suitable for indoor, outdoor LED display, LED advertising screen, commercial LED screen and other applications. In addition to the above features, MBI5040 has a total of 16 output channels, each channel can support 2mA to 60mA output of constant current and voltage range, up to 17V. in addition, MBI5040 also provides force for error detection, message error detection, 7 current gain, and overheating protection function.