What are LCMs? The difference with LCD

What are LCMs? The difference from mobile phone LCD LCM (LCD Module) is LCD display module and mobile LCD screen module, which refers to the assembly of LCD screendevices, connectors, peripheral circuits such as control and drive, PCB circuit boards, backlight sources, structural parts, etc. . LCM driver interface LCM provides users with a standard LCD screen driver interface (4-bit, 8-bit, VGA and other types), and the user operates according to the interface requirements to control the correct display of the LCD. Compared with glass, LCM 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 mobile phone LCD displays, generally It will occupy a considerable part of the resources of the control system or cannot be controlled at all. For example, a 320×240 256-color color LCM is displayed at 20 fields/second (that is, the full screen is refreshed 20 times in 1 second), and only the 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, assuming that the MOVX instruction is used to continuously transmit these data, 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 a fax is also the scanning density. The higher the resolution, the higher the scanning accuracy. It can be divided into vertical resolution and horizontal resolution. Vertical resolution refers to the number of pixels displayed per millimeter on vertical horizontal lines, and horizontal resolution refers to the number of pixels displayed per millimeter on parallel horizontal lines. 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 omit the horizontal resolution and only use vertical resolution to represent the resolution. There are mainly three types of vertical resolution: standard 3.85 pixels/mm, fine 7.7 pixels/mm, and ultra-fine 15.4 pixels/mm. LCM process 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 firstly lay a reinforced material preform designed according to the performance and structural requirements in the mold cavity, and use injection equipment to inject special resin such as closing the mold cavity or heating and melting the resin film in the mold cavity. The mold has peripheral sealing and fastening as well as injection and exhaust system to ensure smooth flow of resin and exhaust all the gas in the cavity and thoroughly infiltrate fibers, and the mold has a heating system that can be heated and cured to form composite components. LCM ( Module), that is, mobile LCD screen module. TFT-mobile phone LCD LCD screenmanufacturers PMOLED display AMOLED display

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