Double-frequency bi-stable liquid crystal display and double-frequency bi-stable liquid crystal composition

A bistable liquid crystal and liquid crystal composition technology, applied in liquid crystal materials, instruments, chemical instruments and methods, etc., can solve problems such as high power consumption, complex electrohydrodynamics, and long response time of displays

Inactive Publication Date: 2015-04-29
POWERTIP TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] It is worth noting that the aforementioned general nematic liquid crystals or dual-frequency nematic liquid crystals are arranged in two stable states (vertical parallel, or parallel Parallel) In the conversion process, a metastable intermediate state that requires high voltage support for operation wi

Method used

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  • Double-frequency bi-stable liquid crystal display and double-frequency bi-stable liquid crystal composition
  • Double-frequency bi-stable liquid crystal display and double-frequency bi-stable liquid crystal composition
  • Double-frequency bi-stable liquid crystal display and double-frequency bi-stable liquid crystal composition

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Embodiment 1

[0066] Example 1: Dual-frequency bistable liquid crystal composition and dielectric constant performance.

[0067] The dual-frequency bistable liquid crystal display of the present invention is made of the dual-frequency nematic phase liquid crystal in which HEF951700-100 is used.

[0068] The dual-frequency liquid crystal has the dielectric constant performance shown in Table 1 below at room temperature of 25°C:

[0069]

[0070] As can be seen from the contents of Table 1, the negative value conversion frequency value of this embodiment is 50KHz, when higher than the negative value conversion frequency value, the voltage dielectric constant anisotropy parameter value difference of the liquid crystal is a state of a negative value, and The positive value conversion frequency value is 100Hz, that is, when the positive value conversion frequency value is lower than the positive value conversion frequency value, such as a voltage frequency of 50Hz, the voltage dielectric cons...

Embodiment 2

[0072] Embodiment 2: Dual-frequency bistable liquid crystal display.

[0073] Such as image 3 As shown, the dual-frequency bistable liquid crystal composition prepared in Example 1 is poured into a liquid crystal cell 10 with a spacing D of 4 μm, and the inner surfaces 111, 121 of the two substrates 11, 12 of the liquid crystal cell 10 are each coated with one layer The alignment layers 15 and 16 are arranged in parallel, and the alignment layer 15 / 16 of one of the substrates 11 / 12 is subjected to an alignment rubbing process. In this embodiment, the color film layer 17 of the liquid crystal cell 10 is a black light-absorbing film, whereby when applying a 50Hz frequency low-frequency voltage, the pixels of the liquid crystal cell 10 appear black, and when applying a 50KHz frequency high-frequency voltage , the pixels of the liquid crystal cell 10 display green.

[0074] In addition, the dual-frequency bistable liquid crystal composition of the present invention can be imple...

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Abstract

The invention discloses a double-frequency bi-stable liquid crystal display and double-frequency bi-stable liquid crystal composition. The double-frequency bi-stable liquid crystal composition made by mixing double-frequency liquid crystal, chiral composition and nematic phase liquid crystal composition is poured into a liquid crystal box; through the component ratio and chemical features of the double-frequency bi-stable liquid crystal composition, the liquid crystal composition mixed has the features of both the double-frequency liquid crystal and the cholesteric phase liquid crystal, under driving of a frequency modulation mode, two optical statuses, namely focal conic texture and planar texture, can be converted through dielectric anisotropy of the liquid crystal, and an image can be displayed; thus, the double-frequency bi-stable liquid crystal display can be in the two optical statuses without voltage maintaining or decomposing the helix structure of the cholesteric phase liquid crystal through high voltage; dielectric conversion is not related to metastable state conversion, power consumption of the double-frequency bi-stable liquid crystal display is effectively reduced, and conversion time is effectively shortened.

Description

technical field [0001] The present invention relates to a liquid crystal display and its liquid crystal composition, in particular to a liquid crystal composition with dual-frequency and bistable characteristics inside, which can control the alignment direction of liquid crystals in an ultra-low span frequency range to achieve display effects monitor. Background technique [0002] The unique photoelectric characteristics of liquid crystals can display images for display purposes after voltage is applied, such as e-readers, mobile phones, electronic tags and other devices. The power consumption requirements for displays are very low and the usable period is usually more than five years , so the development of "bistable liquid crystal display" is mainly to set nematic liquid crystal or cholesteric liquid crystal in the display, cooperate with appropriate design of liquid crystal device parameters and related parameters, use The voltage controls these specific liquid crystals ...

Claims

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Application Information

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IPC IPC(8): G02F1/1333G02F1/139C09K19/46
CPCC09K19/46G02F1/1391G02F1/1392
Inventor 王世岳王新久陈嘉辉黄秋源陈彦良
Owner POWERTIP TECH
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