A method for detecting electric quantity of smectic liquid crystal screen

Abstract

The invention discloses a method for detecting electric quantity of a smectic liquid crystal screen, comprising: removing the first a pulses and the last b pulses of the low-frequency high-voltage pulses with m pulses applied to the row or column during initialization , carry out p average sampling for the remaining pulses and calculate the sampling average value, and take the minimum value among the obtained (m‑a‑b) sampling average values ​​as the power information in the initialization stage; For the high-frequency high-voltage pulses with n pulses above, the first c pulses and the last d pulses are removed, and the remaining pulses are sampled once, and the obtained (n‑c‑d) sampling values ​​are averaged As the row sampling value, the minimum value among all the row sampling values ​​obtained by scanning and driving each row is taken as the power information in the scanning driving stage. The invention can detect the power information when the smectic phase liquid crystal screen is swiped, so as to prepare for taking preventive measures before the low power, and prevent the display abnormality caused by the distortion of the driving pulse waveform.

Description

technical field [0001] The invention relates to a power detection method for a smectic phase liquid crystal screen, belonging to the field of smectic phase liquid crystal screens. Background technique [0002] At present, smectic liquid crystal screens have been more and more widely used in the fields of architectural decoration and privacy control. The smectic phase liquid crystal screen (see the description of the smectic phase liquid crystal screen in the Chinese invention patent No. ZL200710304409.2 "Smectic liquid crystal display drive circuit", etc.) includes a first substrate layer and a second substrate Layer, between the first matrix layer and the second matrix layer is provided with a mixed layer formed by mixing smectic liquid crystals and additives, the smectic liquid crystals are preferably A-type smectic liquid crystal organic compounds, and the additives are The compound with conductive properties is provided with a first conductive electrode layer composed o...

AI Technical Summary

Problems solved by technology

[0006] From the actual implementation, it can be found that although the existing various driving methods of smectic liquid crystal screens can realize the function of image display, but in the initialization phase and scanning driving phase, the power will gradually decrease with the increase in the number of refresh screens. At present, there is no power detection function designed for smectic liquid crystal screens with high applied voltage values. Therefore, when the power of smectic liquid crystal screens is not enough to drive normally, the driving pulse waveform distortion often occurs , resulting in abnormal display of the LCD screen

Images