RGB Tricolor Light Backlight Introduction

 First of all, the LCD monitor has to use the backlight, that is, the fluorescent tube to project the light source, which will first pass through a polarizing plate and then through the liquid crystal, when the arrangement of the liquid crystal molecules and then change the angle of the light penetrating the liquid crystal. These light sources will first pass through a polarizing plate and then through the liquid crystal. So we just need to change the voltage value of the stimulated liquid crystal to control the intensity and color of the light, and then can change the color combination on the LCD panel with different shades.

 The color + black and white dual camera mode, a RGB color camera, responsible for color reproduction, a black and white camera without filter, responsible for the details of the contour, the two have independent image signal processor channel and calibration channel, the color and black and white two pairs of pictures to do matching, and then through the masking, detection, compensation and other algorithmic processing, the two pictures will be fused, in the dark environment to increase the brightness by 2 times, to get a very good dark-light enhancement and a very good dark light. This mode has been used in the 360 high-end mobile phones. This mode, which was first seen in 360's high-end flagship models, was later imitated by Huawei and gradually evolved into a common mode in the industry, and is still used by many models.

  Since 2,3,5 are not distinguishable due to the same statistical table of digital features, we continue to add digital features to distinguish 2,3,5. as shown in Table 2: this completely distinguishes the numbers 0-9 by digital statistics. then we use the FPGA system to build a real-time digital recognition system. As shown in Figure 4, we image acquisition using ov5640500W pixel camera, the captured color RGB image is firstly stored in SDRAM, then the image data is read out by TFT display console, after reading out RGB image data, we firstly perform RGB to Ycbcr algorithm operation, then perform threshold segmentation on grayscale image to form binary image. Digital recognition is performed on the binary digital image, and the final display is on the digital tube.