- Industrial LCD display
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Industrial Products
- DC Servo Drive
- AC Servo Drive
- other
- Heidelberg
- FANUC
- IFM
- Meter
- CCD
- Membrane Keypad
- Film
- YOKOGAWA Module
- Card
- ABB
- MITSUBISHI
- FANUC
- KEYENCE
- BECKHOFF
- Honeywell
- HOLLYSYS
- FUJI servo drives
- HP
- solenoid valve
- thermostat
- Siemens adapter
- color oscilloscope
- Fujitsu connector
- CHELIC
- SMC
- CISCO Module
- INTEL
- Key board
- FAIRCHILD
- Motherboard
- Board
- Bearing
- other
- Control Panel
- Contactor
- Circuit
- OMRON
- Relay
- Controller
- Photoelectric Switch
- Photoelectric Sensor
- Original
- Fan
- Motor Driver
- Limit Switch
- Amplifier
- power supply
- LENZE
- Cable
- Encoder
- Sensor
- Transformer
- Fiber Optic Sensor
- Protection Relay
- Temperature Controller
- Proximity Switch
- Switch Sensor
- Siemens
- Industrial board
- HMI Touch Glass
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HMI Full Machine Whole unit
- OMRON HMI Touch Panel
- Siemens HMI Touch Panel
- Mitsubishi HMI Touch Panel
- Allen-Bradley automation HMI Touch Panel
- DELTA HMI Touch Panel
- EVIEW DELTA HMI Touch Panel
- KINCO DELTA HMI Touch Panel
- HITECH HMI Touch Panel
- WEINTECK HMI Touch Panel
- TECVIEW HMI Touch Panel
- WEINVIEW HMI Touch Panel
- PRO-FACE HMI Touch Panel
- SIMATIC HMI Touch Panel
- AMPIRE HMI Touch Panel
- HEIDELBERG HMI Touch Panel
- PANASONIC HMI Touch Panel
- PATLITE HMI Touch Panel
- KYOCERA HMI Touch Panel
- KEYENCE HMI Touch Panel
- WEINVIEW HMI Touch Panel
- HITECH HMI Touch Panel
- FUJI HMI Touch Panel
- HAKKO HMI Touch Panel
- SCHNEIDER HMI Touch Panel
- SAMKOON touch panel
- other
- Module
- lcd inverter
- Membrane Keypad Switch
- Winni Touch Screens
- Frequency Inverter
- Servo Motor
- PLC
Making of LCD
To make an LCD, you need to take two polarized glass pieces. The glass which does not have a polarized film on it must be rubbed with a special polymer which creates microscopic grooves in the surface. It must also be noted that the grooves are on the same direction as the polarizing film. Then, all you need to do is to add a coating of nematic liquid crystals to one of the filters. The grooves will cause the first layer of molecules to align with the filter’s orientation. At right angle to the first piece, you must then add a second piece of glass along with the polarizing film. Till the uppermost layer is at a 90-degree angle to the bottom, each successive layer of TN molecules will keep on twisting. The first filter will naturally be polarized as the light strikes it at the beginning. Thus the light passes through each layer and is guided on to the next with the help of molecules. When this happens, the molecules tend to change the plane of vibration of the light to match their own angle. When the light reaches the far side of the liquid crystal substance, it vibrates at the same angle as the final layer of molecules. The light is only allowed an entrance if the second polarized glass filter is same as the final layer. Take a look at the figure below. The main principle behind liquid crystal molecules is that when an electric current is applied to them, they tend to untwist. This causes a change in the light angle passing through them. This causes a change in the angle of the top polarizing filter with respect to it. So little light is allowed to pass through that particular area of LCD. Thus that area becomes darker comparing to others. For making an LCD screen, a reflective mirror has to be setup in the back. An electrode plane made of indium-tin oxide is kept on top and a glass with a polarizing film is also added on the bottom side. The entire area of the LCD has to be covered by a common electrode and above it should be the liquid crystal substance. Next comes another piece of glass with an electrode in the shape of the rectangle on the bottom and, on top, another polarizing film. It must be noted that both of them are kept at right angles. When there is no current, the light passes through the front of the LCD it will be reflected by the mirror and bounced back. As the electrode is connected to a temporary battery the current from it will cause the liquid crystals between the common-plane electrode and the electrode shaped like a rectangle to untwist. Thus the light is blocked from passing through. Thus that particular rectangular area appears blank. |