COLOR-CHANGING LIGHT-ADJUSTING LIQUID CRYSTAL DEVICE AND LIGHT ADJUSTING METHOD THEREOF

• US 20200133036A1
• Filed: 07/06/2018
• Published: 04/30/2020
• Est. Priority Date: 08/18/2017
• Status: Abandoned Application

• Current Assignee: Shenzhen Guohua Optoelectronics Co. Ltd
• Original Assignee: Shenzhen Guohua Optoelectronics Co. Ltd
• Inventors: ZHOU, Guofu, ZHAN, Yuanyuan, BROER, Dirk Jan, LIU, Danqing, SCHENNING, Albertus Petrus Henricus Johannes
• Application Number:
  US16/481,083
• Publication Number:
  US 20200133036A1
• Time in Patent Office: Days
• CPC Class Codes: G02F 1/1337 Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers
• CPC Class Codes: G02F 1/133738 for homogeneous alignment
• CPC Class Codes: G02F 1/133742 for homeotropic alignment
• CPC Class Codes: G02F 1/137 characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering
• CPC Class Codes: G02F 1/13706 the liquid crystal having positive dielectric anisotropy
• CPC Class Codes: G02F 1/13712 the liquid crystal having negative dielectric anisotropy
• CPC Class Codes: G02F 1/13737 in liquid crystals doped with a pleochroic dye
• CPC Class Codes: G02F 1/13756 the liquid crystal selectively assuming a light-scattering state G02F1/1334, G02F1/13718 take precedence
• CPC Class Codes: G02F 2202/043 pleochroic

Abstract

A color-changing light-adjusting liquid crystal device and a light-adjusting method may include a main liquid crystal and a dichroic dye, which may be filled between substrates disposed oppositely, in a non-powered state. The main liquid crystal may be subjected to a specific arrangement orientation under an induction of an alignment layer, in a powered state, and the main liquid crystal may be subjected to a reorientation. Dichroic dye molecules may be rotated along with the reorientation of the main liquid crystal so as to scatter incident light in a visible spectrum, convert a light-transmitting state into a light-scattering state at a macro level, and display a color of the dichroic dye in the main liquid crystal, thus implementing light adjustment. The color-changing light-adjusting liquid crystal device does not contain a polymer network, so that a polymerization process is not needed and a polymer aging is avoided.

Claims

1. A color-changing light-adjusting liquid crystal device, comprising:

two substrates disposed oppositely, each comprising a light-transmitting substrate, a conducting layer and an alignment layer, sequentially disposed from outside to inside, the alignment layers of the two substrates are disposed oppositely;

an adjusting area, formed between the two substrates;

a liquid crystal mixture, filled in the adjusting area, and comprising a main liquid crystal with dielectric anisotropy and a dichroic dye.

2. The color-changing light-adjusting liquid crystal device according to claim 1, wherein the main liquid crystal is a negative liquid crystal, and the alignment layer is a vertical alignment layer.

3. The color-changing light-adjusting liquid crystal device according to claim 1, wherein the main liquid crystal is a positive liquid crystal, and the alignment layer is a parallel alignment layer.

4. The color-changing light-adjusting liquid crystal device according to claim 1, wherein the liquid crystal mixture comprises 90.0 wt % to 99.99 wt % of the main liquid crystal and 0.01 wt % to 10.0 wt % of the dichroic dye.

5. The color-changing light-adjusting liquid crystal device according to claim 1, wherein the dichroic dye is at least one of fluorescent green, a purple dichroic dye and an orange dichroic dye.

6. The color-changing light-adjusting liquid crystal device according to claim 2 wherein the dichroic dye is at least one of fluorescent green, a purple dichroic dye and an orange dichroic dye.

7. The color-changing light-adjusting liquid crystal device according to claim 3, wherein the dichroic dye is at least one of fluorescent green, a purple dichroic dye and an orange dichroic dye.

8. The color-changing light-adjusting liquid crystal device according to claim 4, wherein the dichroic dye is at least one of fluorescent green, a purple dichroic dye and an orange dichroic dye.

9. The color-changing light-adjusting liquid crystal device according to claim 1, wherein a height of the adjusting area is 5 μ

m to 50 μ

m.

10. The color-changing light-adjusting liquid crystal device according to claim 2, wherein a height of the adjusting area is 5 μ

m to 50 μ

m.

11. The color-changing light-adjusting liquid crystal device according to claim 3, wherein a height of the adjusting area is 5 μ

m to 50 μ

m.

12. The color-changing light-adjusting liquid crystal device according to claim 4, wherein a height of the adjusting area is 5 μ

m to 50 μ

m.

13. The color-changing light-adjusting liquid crystal device according to claim 1, further comprising a power supply component, wherein two poles of the power supply component are respectively electrically connected with two conducting layers.

14. The color-changing light-adjusting liquid crystal device according to claim 2, further comprising a power supply component, wherein two poles of the power supply component are respectively electrically connected with two conducting layers.

15. The color-changing light-adjusting liquid crystal device according to claim 3, further comprising a power supply component, wherein two poles of the power supply component are respectively electrically connected with two conducting layers.

16. The color-changing light-adjusting liquid crystal device according to claim 4, further comprising a power supply component, wherein two poles of the power supply component are respectively electrically connected with two conducting layers.

17. The color-changing light-adjusting liquid crystal device according to claim 13, wherein a working voltage of the power supply component is 7 V to 50 V.

18. The color-changing light-adjusting liquid crystal device according to claim 13, wherein a working frequency of the power supply component is 50 Hz to 1000 Hz.

19. A light-adjusting method for the color-changing light-adjusting liquid crystal device according to claim 1, comprising:

converting the main liquid crystal, by applying an AC voltage, from a specific orientation arrangement to an another orientation arrangement, reorientation occurs, impurity ions contained in the liquid crystal mixture and ions generated by the color-changing light-adjusting liquid crystal device under an AC electric field move back and forth between the substrates, which disorganizes the orientation arrangement of the main liquid crystal, enables the dichroic dye and the liquid crystal molecules to rotate, and adjusting transmission and scattering of visible light, realizing light adjustment.

20. A light-adjusting method for the color-changing light-adjusting liquid crystal device according to claim 2, comprising:

converting the main liquid crystal, by applying an AC voltage, from a specific orientation arrangement to an another orientation arrangement, reorientation occurs, impurity ions contained in the liquid crystal mixture and ions generated by the color-changing light-adjusting liquid crystal device under an AC electric field move back and forth between the substrates, which disorganizes the orientation arrangement of the main liquid crystal, enables the dichroic dye and the liquid crystal molecules to rotate, and adjusting transmission and scattering of visible light, realizing light adjustment.