Polymer dispersed liquid crystal thermal-sensitive dimming temperature card and manufacturing method thereof

A technology for dispersing liquid crystals and polymers, applied to thermometers, thermometers, and parts of thermometers that change physically or chemically, to achieve the effects of large temperature range, low cost, and simple manufacturing methods

CN110440948APending Publication Date: 2019-11-12深圳市德安里科技有限公司
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2019-11-12

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Abstract

The invention relates to a polymer dispersed liquid crystal thermal-sensitive dimming temperature card and a manufacturing method thereof. The temperature card is formed by clamping a plurality of polymer dispersed liquid crystal film sheets in sequential arrangement and a transparent plastic sheet with a temperature scale value by two transparent films; and liquid crystals in the polymer dispersed liquid crystal film sheets arranged in sequence have different clear point temperatures and are arranged according to the size of the clear point temperature values. The temperature card has the same function as the existing cholesteric liquid crystal thermochromism display temperature card, but has different appearance visual effects; the temperature range can be large and small, the manufacturing method is simple, and the cost is low; the temperature card can be used as temperature indicating cards (such as for water temperature display in a vacuum cup and the like) as a non-electronic andportable application, and the temperature card can be embedded into an electric kettle and the like to display the temperature, but is not related to electronic circuits..
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Description

technical field

[0001] The invention belongs to the technical field of manufacturing liquid crystal temperature cards, in particular to a polymer-dispersed liquid crystal thermosensitive dimming temperature card and a manufacturing method thereof. Background technique

[0002] The body temperature card manufactured by the thermochromic effect of cholesteric liquid crystal is an example of a small product applied to liquid crystal non-electronic display devices that has been commercialized for many years. This kind of body temperature card is made of plastic film, with a series of small black blocks on it, and there is cholesteric liquid crystal in each block. When the temperature card is in the display range of the ambient temperature, the corresponding block will change from Black becomes colored (such as monochrome such as dark orange, dark yellow, dark green, dark blue) and shows temperature scale black font, and prior art cholesteric phase liquid crystal itself has Bragg...

Examples

Embodiment

[0030] In this embodiment, the polymer-dispersed liquid crystal thermosensitive dimming temperature card is composed of two transparent films sandwiching a plurality of polymer-dispersed liquid crystal film sheets arranged in sequence and a transparent plastic sheet 9 marked with a temperature value; The liquid crystals in the plurality of polymer-dispersed liquid crystal film sheets arranged in sequence have different clearing point temperatures, and are arranged according to the value of the clearing point temperature.

[0031] The polymer-dispersed liquid crystal film includes liquid crystal and an ultraviolet curable polymer with an average refractive index close to that of the liquid crystal and doped with a small amount of spacers.

[0032] The clearing point temperatures of the liquid crystals in two adjacent polymer-dispersed liquid crystal film sheets differ by 5°C.

[0033]A series of liquid crystals with different clearing points, UV-cured prepolymer and a small amo...