LCD device and method for mfg of same
A technology of liquid crystal display and manufacturing method, which is applied in chemical instruments and methods, liquid crystal materials, static indicators, etc., can solve the problems of inability to obtain uniform arrangement of liquid crystals, and achieve high-definition effects
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Embodiment 1
[0038] Cleaning has an electrode area of 1cm 2 And after the glass substrate of the transparent electrode formed by ITO (Indium Tin Oxide), polyimide is coated on the surface of the glass substrate on which the transparent electrode is formed, and then baked under the condition of 200 ℃ for one hour, so as to form about 20nm polyimide film. The surface of this polyimide film was ground with a rayon fabric, and then two glass substrates with transparent electrodes were placed facing each other so that their grinding directions were parallel (the grinding directions were oriented in the same direction). The gap between the glass substrates when placed facing each other was maintained by a spacer composed of silica having an average particle diameter of 1.6 μm and forming an empty cell for evaluation (evaluation empty cell). Note that the actual measurement of this gap is around 1.7-1.8 μm.
[0039] FIG. 2 is a characteristic table showing the relationship between the cooling...
Embodiment 2
[0047] In Example 2, as in Example 1, an evaluation cell was manufactured by introducing a sample F liquid crystal into an evaluation empty cell, and an alignment process was performed. The liquid crystal cooling process included cooling the liquid crystal to room temperature (25° C.) at a fixed cooling rate of 3° C. / min after heating the liquid crystal to the cholesteric phase (120° C.). Alignment processing is performed by applying a DC voltage as an applied voltage to the liquid crystal by changing the amplitude of the DC voltage to 1, 2, 3, 5, and 10 V within a temperature range of ±3°C from the transition temperature (97°C), Wherein at the transition temperature, the phase of the liquid crystal changes from the cholesteric phase to the chiral smectic C phase.
[0048] FIG. 4 is a characteristic table showing the relationship between the applied voltage and the alignment state in the alignment process. This shows the applied voltage in the alignment process and the result...
Embodiment 3
[0051]In Example 3, as in Example 1, an evaluation cell was manufactured by introducing sample E liquid crystal into an evaluation empty cell, and an alignment process was performed. The liquid crystal cooling process includes cooling the liquid crystal to 95°C at a cooling rate of 5°C / min after heating the liquid crystal to the isotropic phase (100°C), and then cooling the liquid crystal to 86°C at a cooling rate of 1°C / min , and further cooled the liquid crystal to room temperature (25° C.) at a cooling rate of 5° C. / min. Alignment treatment is performed by applying a DC voltage of 3 V as an applied voltage to the liquid crystal within a temperature range of ±3°C from the transition temperature (89°C) at which the phase of the liquid crystal changes from a cholesteric phase to a chiral Smectic C phase (92 to 86°C). The obtained alignment state was uniform alignment, which is the same as the alignment state obtained by cooling from 100°C to 25°C at a cooling rate of 1°C / min....
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Abstract
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