LCM (lcd Module) refers to the lcd Display module, liquid crystal module, which refers to the assembly of liquid crystal Display devices, connectors, control and drive peripheral circuits, PCB circuit boards, backlight sources, structural parts, etc. together.
Drive interface
LCM provides users with a standard lcd Display drive interface (with different types such as 4-bit, 8-bit, VGA, etc.), and the user operates in accordance with the interface requirements to control the correct lcd display. Compared with lcm, glass is a more integrated lcd product. For small-size LCD displays, LCM can be easily connected to various microcontrollers (such as single-chip microcomputers); however, for large-size or color LCD displays, generally It will occupy a considerable part of the control system’s resources or it is impossible to control at all. For example, a 320×240 256-color color lcm is displayed at 20 fields/sec (that is, full-screen refresh Display 20 times in 1 second), and only data transmitted in one second The amount is as high as: 320×240×8×20=11.71875Mb or 1.465MB. If the standard MCS-51 series single-chip microcomputer is used for processing, it is assumed that the MOVX instruction is repeatedly used to transmit these data continuously. Considering the address calculation time, at least a 421.875MHz clock is required. In order to complete the data transmission, it can be seen that the amount of processed data is huge.
The Resolution of the fax is the scanning density. The higher the Resolution, the higher the scanning accuracy. It can be divided into vertical Resolution and horizontal Resolution. The vertical resolution refers to the number of pixels displayed per millimeter on a vertical horizontal line, and the horizontal resolution refers to the number of pixels displayed per millimeter on a parallel horizontal line. According to the international standards of the three types of fax machines, the horizontal resolution is 8 pixels/mm. Therefore, the resolution of the fax machine is generally expressed as 8 pixels/mm×vertical pixels/mm. Generally, we omit the horizontal resolution and use only the vertical resolution. Resolution means resolution. There are three main vertical resolutions: standard 3.85 pixels/mm, fine 7.7 pixels/mm, and ultra-fine 15.4 pixels/mm.
The process of LCM
The lcm process (Liquid Composite Molding, composite material liquid molding process) refers to the composite material liquid molding technology represented by RTM, RFI and RRIM. The main principle is to first lay the reinforced material preform designed according to the performance and structure requirements in the mold cavity, and use the injection equipment to inject the special injection resin into the closed cavity or heat to melt the resin film in the cavity. The mold has peripheral sealing and fastening, as well as injection and exhaust systems to ensure smooth resin flow and exhaust all gas in the mold cavity and thoroughly infiltrate the fibers, and the mold has a heating system for heating and curing to form composite components. LCM (Liquid Crystal Module), that is, liquid crystal module.
