LCM (LCD Module) is an LCD display module and a liquid crystal module. It refers to a component that assembles a liquid crystal display device, a connector, a peripheral circuit for controlling and driving, a PCB circuit board, a backlight, and a structural member.
LCM drive interface
LCM provides users with a standard LCD display driver interface (different types such as 4-bit, 8-bit, VGA, etc.), and the user operates according to the interface requirements to control the LCD to display correctly. Compared with glass, LCM is a more integrated LCD product. For small-size LCD display, LCM can be easily connected to various microcontrollers (such as single-chip microcomputer); however, for large-size or color LCD display, generally Will occupy a considerable part of the control system resources or can not achieve control, such as 320 × 240 256 color color LCM, display 20 seconds / second (that is, 1 second full screen refresh display), only one second of data transmission The quantity is as high as: 320×240×8×20=11.71875Mb or 1.465MB. If the standard MCS-51 series MCU is processed, it is assumed that the MOVX instruction is used to continuously transmit the data. Considering the address calculation time, at least 421.875MHz clock is needed. In order to complete the data transmission, it can be seen that the amount of data processed is huge. The resolution of the fax is also the scanning density. The higher the resolution, the higher the accuracy of the scanning. It can be divided into vertical resolution and horizontal resolution. Vertical resolution refers to the number of pixels displayed per millimeter on a vertical horizontal line, and horizontal resolution refers to the number of pixels displayed per millimeter on a parallel horizontal line. According to the international standard of the three types of fax machines, the horizontal resolution is 8 pixels / mm, so the resolution of the fax machine is generally expressed as 8 pixels / mm × vertical pixels / mm, generally we will save the horizontal resolution, only vertical Resolution to represent the resolution. The vertical resolution mainly has three standards: 3.85 pixels/mm, fine 7.7 pixels/mm, and ultra-fine 15.4 pixels/mm.
LCM process
LCM process (Liquid Composite Molding) refers to composite liquid forming technology represented by RTM, RFI and RRIM. The main principle is to first lay a reinforcing material preform designed in the cavity according to performance and structural requirements, and use a injection device to inject a special resin such as a closed cavity or a resin film in a heated cavity. The mold has peripheral sealing and fastening as well as an injection and exhaust system to ensure smooth flow of the resin and to exhaust all of the gas in the mold cavity and thoroughly wet the fibers, and the mold has a heating system that can be heat cured to form the composite member. LCM (Liquid Crystal Module), which is a liquid crystal module.
