Based on the EZ - Color the LED mixed Color scheme design of the controller

In order to obtain relatively too color range, the one-sided in LED color mixture design by using current or voltage control method to use the micro-controller or field programmable gate array (fpga) ( FPGA) Intelligent techniques, such as such as selection of all sorts of color and color accuracy real-time adjustment in the operation process. LED color mixture design faces two too barriers, namely the inconsistencies of various LED parameters and the performance of the LED with the temperature change, this requires in LED LED specifications must be considered in the design of mixed color and temperature compensation. However, this compensation algorithm is not only complex, but also for the design engineer has more professional knowledge of color science theory. Currently has a fast simple method, is based on '(plath 柏树) EZ - Color the LED Color mixture design of the controller.

　　EZ- Color controller for high brightness LED mixed Color application programmable system on a chip. It is mainly composed of 8 bit microprocessors, programmable analog and digital modules and additional hardware multiplication accumulator, IC, Flash, SRAM and other peripheral modules. Using EZ - Color controller to design mixed Color, must use the plath no code graphical design software - PSoC express。 PSoC express is a kind of don't have to let design into the member code of embedded system design tools. The tools themselves running on the system level rather than the design level, it is a kind of special function rather than the circuit, and the function itself is real devices, sensors, thermistors or LED driver.

　　EZ- Color controller driven by input, output, and the transfer function relation, the realization of the mixed Color scheme mechanism is shown in figure 1. Figure 1 illustrates the EZ - 9 Color mixed Color scheme adopts ( y, y, y) For the input, the output is RGB trichromatic leds. Three color LED hardware driver adopted random signal modulation (compulsory SSDM) User module. Input ( x, y, y) According to the CIE chromaticity diagram representation method to represent the EZ - 1931 Color the Color of the input request message that x and y represent, hue and saturation Color chromaticity information; And y represent the luminous flux, reflects the brightness of the color information. SSDM user module is Cyprus ￣'s precision illuminance signal modulation ( 棱镜) The technology of hardware implementation. The PrISM technology is a kind of special LED brightness control technology is superior to the traditional PWM method, it can effectively solve the problem of electromagnetic interference and low frequency flash. Figure 1

EZ - Color scheme implementation diagram

EZ - Color controller combined with software PSoC express fit fundamentally changed the enterprise into the threshold of the LED market. This solution not only makes the operator does not need to study mixed color learn ( A need a lot of input and itself complicated subject) And do not need to prepare the thermistor components or LED products such as classification of multidimensional lookup table. The advantage is more prominent, EZ - Color to be able to complete these tasks in a few minutes. Using the mixed color LED technology, do not need to perform C language code, because language itself is used to simulate the standard lighting technology. New mixed color scheme not only has high integration, low cost, flexibility, taihe characteristics of ease of use, but also can effectively solve the problem of low-frequency flicker and electromagnetic interference.

edit: Steve