Liquid crystal COG LCD
Module device by the two glass. The outer lead is attached to the surface of the transparent conductive film made of photolithography, can not use the conventional welding processes. Currently there are connection process:
1, the conductive rubber connector
This is a more traditional way. Conductive rubber strip all known as zebra conductive rubber strip is determined by a layer of conductive rubber, a layer of insulating rubber white laminated into a very thick one, and then in the direction perpendicular to the surface of the rubber strip cut into strips. When used, just outside the lead and the liquid crystal display circuit board traces correspond neatly side, the Zebra caught in the meantime, to fix them. To do this, we must make a pressure box. Pressure frame material shape can be any design, but must ensure that there is a pressing amount to about 0.2mm, the need to ensure that the pressure uniform, not bent.
2, the metal pin connector
Stamping into the metal pins, the first liquid crystal display which plug member fixed to the end of the outer lead, to the user, or when soldered or plugged into the circuit board.
These two methods more used digital type, the outer lead much (line pitch> 1.25mm or more) of the liquid crystal display device.
3, hot film flexible connection
Calculators and digital communications equipment commonly used. Its hot conductive connection with a polyester film, in the intervals of graphite printed on a thermal conductive adhesive strips and insulation. When used, the end of the alignment of the liquid crystal display device of the conductive strips of the outer lead securement, plus potential, pressure, and the other end of the conductive stripe aligned snapping lead terminal board, heat and pressure can. Since it takes a certain pressure and temperature, so users need to configure a dedicated hot press.
4, the anisotropic conductive adhesive connections
The so-called anisotropic conductive adhesive is shown in Figure 1 as a hot film. Interspersed with gold plated film in plastic balls, to be sandwiched between the LCD and PCB heat and pressure, the lead because of the thin film pressure, and connected by a conductive plastic ball, since the lead spacing, so it will not horizontal concatenation. So called anisotropic conductive connection. Also known as TAB connection. This connection can easily connect line spacing device is only 0.1mm. Is the high density and large amount of information necessary for connecting liquid crystal lcd module technology. Because it requires precision alignment and precise pressure, temperature control, you need to set the price of expensive special equipment job.
Connection with TAB method the chip directly on the liquid crystal display device on the glass COG mounting method, the pressure in the chip from the board COB hard wire and the chip mounting pressure in the flexible circuit board COF mounting.
OLED Module technology and development with echoes, OLED drive also plays an increasingly important role. Not only from the low duty cycle increases to support high duty cycle, and the application of such a control current for each RGB, wider IC operating temperature (-45 to 80 ℃), the internal DC-DC boost, as well as graphics acceleration instruction and some other features.
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