Unidirectional pulse driving method of smectic state liquid crystal display
A liquid crystal display, one-way pulse technology, applied in static indicators, instruments, etc., can solve the problems of high cost, increase cost, increase driving difficulty, etc., and achieve the effect of reducing cost, realizing simplicity, and ensuring normal display.
Inactive Publication Date: 2012-08-01
HALATION PHOTONICS CORP
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For example, the high-frequency high-voltage positive and negative pulses can be composed of figure 1 The shown waveform form is realized by the positive and negative pulse pairs composed of positive pulse and negative pulse. The waveform is powered by positive and negative power supplies, and the voltage amplitude is Um. Two sets of high-voltage isolation devices are needed to realize the waveform. The realization of the waveform is complicated and the driving is difficult. cost more
If high-frequency high-voltage positive and negative pulses with different voltage amplitudes are applied to the row and column electrodes, four sets of high-voltage isolation devices are required to realize the realization, which increases the complexity of waveform realization, increases the difficulty of driving, and improves cost
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[0027] The unidirectional pulse driving method of the smectic liquid crystal display screen of the present invention is a method for the smectic liquid crystal display screen. Such as figure 2 with image 3 As shown, the smectic liquid crystal display screen 10 includes a first base layer 11 and a second base layer 12, and the material of the first base layer 11 and the second base layer 12 can be transparent glass or plastic. Between the first base layer 11 and the second base layer 12, there is a mixed layer 13 formed by mixing smectic liquid crystals and additives. The smectic liquid crystal (shown as smectic liquid crystal molecules microscopically, see below) is any one of compounds with siloxy groups, tetracyanotetraoctylbiphenyl or decyl tetraacetate tetracyanobiphenyl species or a mixture of any species. The additives are compounds with conductive properties, such as hexadecyltriethylammonium bromide and other compounds containing conductive ions. A first conducti...
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The invention discloses a unidirectional pulse driving method of a smectic state liquid crystal display. The method comprises the following step: carrying out line-by-line scanning driving on a display screen, wherein scanning and driving one line comprises: applying corresponding voltage waveforms to each row and each column in a scanning phase; applying 0v voltage to all the rows and the columns in a group phase; applying the corresponding voltage waveforms to the each row and the each column in a DC equilibrium phase, wherein the voltage waveforms applied to the each row and the each column in the scanning phase has a certain of corresponding relationship with the voltage waveforms applied to the each row and the each column in the DC equilibrium phase. Therefore, by using the method of the invention, under the condition that DC equilibrium can be guaranteed during a whole period, scanning and driving can be realized only with the unidirectional voltage waveform. It is simple to drive the voltage waveform. Driving difficulty is low and hardware circuit cost is low.
Description
technical field [0001] The invention relates to a scanning driving method of a smectic liquid crystal display, in particular to a unidirectional pulse driving method of a smectic liquid crystal display. Background technique [0002] Currently, smectic liquid crystal displays use high-frequency high-voltage positive and negative pulses as voltage waveforms for driving row and column electrodes. For example, the high-frequency high-voltage positive and negative pulses can be composed of figure 1 The shown waveform form is realized by the positive and negative pulse pairs composed of positive pulse and negative pulse. The waveform is powered by positive and negative power supplies, and the voltage amplitude is Um. Two sets of high-voltage isolation devices are needed to realize the waveform. The realization of the waveform is complicated and the driving is difficult. It costs a lot. If high-frequency high-voltage positive and negative pulses with different voltage amplitudes ...
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Inventor 夏兴隆刘利强孙刚
Owner HALATION PHOTONICS CORP