Electric quantity detection method of smectic phase liquid crystal screen

Abstract

The invention discloses an electric quantity detection method of a smectic phase liquid crystal screen. The method comprises the steps of: in an initialization process, removing a headmost pulses and b backmost pulses of m low-frequency high-voltage pulses applied to a row or column, carrying out p times of average sampling on the residual pulses, obtaining sampling average values, and using the minimum value in the (m-a-b) obtained sampling average values as the electric quantity information of the initialization phase; and when scanning is driven, removing c headmost pulses and d backmost pulses of n high-frequency high-voltage pulses applied to a row, carrying out once sampling on the residual pulses, averaging (n-c-d) sampling values, using the average value as a row sampling value, and taking the minimum value in all row sampling values obtained by scanning of all rows as the electric quantity information of the scanning driving phase. According to the invention, the electric quantity information in a screen refreshing process of the smectic phase liquid crystal screen is detected, so that prevention measures are taken before a low electric quantity, and abnormal display caused by waveform distortion of driving pulses is prevented.

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...

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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

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