Title:
AUTO DARKENING FILTER ACHIEVING HIGH SHADE NUMBER
Document Type and Number:
WIPO Patent Application WO/2018/072355
Kind Code:
A1
Abstract:
An auto darkening filter, comprising: a first positive liquid crystal (LCD1) having positive dielectric anisotropy; a second positive liquid crystal (LCD2) having positive dielectric anisotropy; a first liquid crystal control circuit (A) for controlling, on the basis of a received control signal, the first liquid crystal (LCD1) and the second liquid crystal (LCD2); a negative-phase liquid crystal (LCD3) provided between the first liquid crystal (LCD1) and the second liquid crystal (LCD2); a second liquid crystal control circuit (B) for controlling, on the basis of a received control signal, the negative-phase liquid crystal (LCD3); a UV/IR glass for filtering welding arc light; a light control circuit, the light control circuit being used for detecting the welding arc light, generating, on the basis of the detected intensity of the welding arc light, a corresponding control signal, and outputting the corresponding control signal to a master control circuit; and the master control circuit, the master control circuit being respectively connected to the light control circuit, the first liquid crystal control circuit (A) and the second liquid crystal control circuit (B), and being for outputting the liquid crystal control signals to the first liquid crystal control circuit (A) and the second liquid crystal control circuit (B).
Inventors:
WU ZIQIAN (CN)
Application Number:
PCT/CN2017/071245
Publication Date:
April 26, 2018
Filing Date:
January 16, 2017
Export Citation:
Assignee:
TECMEN ELECTRONICS CO ，LTD (CN)
International Classes:
A61F9/06
Foreign References:
| CN206096678U | 2017-04-12 | |||
| CN104854485A | 2015-08-19 | |||
| CN102217988A | 2011-10-19 | |||
| CN2177464Y | 1994-09-21 | |||
| CN104115041A | 2014-10-22 | |||
| KR20160004080A | 2016-01-12 | |||
| US5793449A | 1998-08-11 |
Attorney, Agent or Firm:
NTD UNIVATION INTELLECTUAL PROPERTY AGENCY LTD. (CN)
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