1. Resistance has no polarity
The liquid crystal cell of the segment LCD liquid crystal display is a capacitive load, and the resistance of the liquid crystal is negligible in most cases. It is non-polar, that is, the effect of positive pressure and negative pressure is the same. However, when driving, it is not advisable to apply a DC voltage, otherwise it will cause the liquid crystal to be distracted, causing the aging of the motor, and greatly reducing the service life of the LCD screen.
2. The light transmittance will not change with the peak voltage
Because the optical properties of liquid crystals change under the action of electric fields rely on the elastic deformation of liquid crystals as an elastic continuum, and the response time is long. Therefore, the effect of the alternating driving voltage will not succumb to its peak value. When the frequency is less than a certain value Below, the change of the liquid crystal light transmittance of the segment LCD liquid crystal display is only related to the effective value of the applied voltage.
3. The static driving effect is good
Each segment in the segment code screen is filled with a special liquid crystal. Under the action of the electric field, the arrangement direction of the crystal will be twisted, thereby changing its light transmittance, and you can see the displayed content. As long as the driving voltage of the segment LCD liquid crystal display is maintained, the liquid crystal can be repeatedly driven. Therefore, compared with dynamic driving, static driving has the advantages of good contrast, high brightness and response speed.
Because the segment code LCD liquid crystal display is composed of seven pen segments to display the numbers 0-9, many companies that produce calculators, clocks and other products will order this type of liquid crystal display from the segment code LCD display factory. Screen to use. However, since the segment code LCD liquid crystal display has the above-mentioned characteristics, it is necessary to pay attention to the use of AC voltage to drive it when using it.
