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Rotational Viscosity for Negative NLC
A system specifically designed for measuring the difficult to determine rotational viscosity of negative dielectric nematics
ALCT-NG1
PRODUCT INQUIRY -
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DESCRIPTION
With the advent of projection and direct-view large-sized liquid crystal monitors and televisions, the vertically aligned mode liquid crystal display has become prominent. These displays depend on negative dielectric liquid crystals. One of the most critical parameters for any LC is γ1, the rotational viscosity, which greatly influences the time response of the display. However, measuring the rotational viscosity of negative dielectrics has traditionally been difficult. This is due to backflow and other such switching phenomena. Instec designed the Negative Nematic Liquid Crystal γ1 (ALCT-NG1) test instrument specifically to overcome this problem. With it, one can quickly and accurately measure the rotational viscosity of negative dielectric materials in seconds. The rotational viscosity is a parameter particularly sensitive to temperature. As with all Instec liquid crystal measuring instruments, the NNLCG1 integrates easily with either the TP102LC4 temperature controlled shielding box or the
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SPECIFICATIONS
Output Wave
1KHz, voltage 0 to ±100V
Output Update Rate
500KHz
Output Resolution
16 bit
Input Resolution
16 bit
Input Sample Rate
500KHz
Current Measurement Range
1nA ~ 1mA
Current Sensing Resistance
10KΩ
Current Resolution
100pA
Post Gain in the ALCT Box
1, 10, 100, 1000
Capacitance Measurement
2pF to 100nF