CN204618559U - A kind of LCD automatic beam change welding goggles - Google Patents

Abstract

The utility model relates to an LCD automatic darkening welding goggle, which comprises a UV filter, a first polarizer, a first TN-LCD liquid crystal box, a second polarizer, a third polarizer, a second polarizer from top to bottom. TN-LCD liquid crystal cell, fourth polarizer, spacer plain glass, the thickness of the first and second TN-LCD liquid crystal cell is 3-5 μm. The utility model has the advantages that high-quality TN-LCD liquid crystal box is combined with polarizers and filters to form a light-shielding lens, and the light sensing system on the lens can detect the generation and disappearance of arc light during electric welding in an instant, and quickly drive the liquid crystal Shading and discoloration to achieve safe and effective filtering of harmful light, thereby protecting welders' eyes and face from arc radiation damage. It can be made into a head-mounted mask integrated with a safety helmet, completely liberating the welder's hands and ensuring safety protection.

Description

A kind of LCD automatic darkening welding goggles

technical field

The utility model relates to a welding goggle, in particular to an LCD automatic darkening welding goggle.

Background technique

The current general-purpose welding goggles are extremely dark lenses, and the welder can't see things before the arc is started. So you have to hold the goggles or operate the welding mask with one hand, and hold the welding handle with the other. In order to avoid eye irritation and damage caused by strong arc light, the goggles are usually fastened before the welding rod approaches the workpiece and the arc has not yet started. Its main disadvantages are twofold: one is that two hands cannot be freed to operate effectively at the same time, especially for high-altitude operations; the other is that blind arc welding is based on experience welding, and the initial welding spot is found afterwards, which affects the welding quality and wastes Welding materials and electricity.

At present, the common products on the market cannot all reach the first level in the four aspects of uniformity, light dispersion, response speed, and viewing angle dependence. The common ones are 1/1/1/2 and 1/2/1/1. Unable to meet eye protection needs.

Contents of the invention

In order to overcome the deficiencies of the prior art, the purpose of this utility model is to provide a kind of LCD automatic darkening welding goggles, which can safely and effectively filter harmful light, and protect the welder's eyes and face from the damage of arc radiation.

In order to achieve the above object, the utility model is realized through the following technical solutions:

A kind of LCD automatic darkening welding goggles, including a UV filter, a first polarizer, a first TN-LCD liquid crystal cell, a second polarizer, a third polarizer, and a second TN-LCD liquid crystal from top to bottom Cell, fourth polarizer, spacer plain glass, the thickness of the first and second TN-LCD liquid crystal cells is 3-5 μm.

The twist angles of the first and second TN-LCD liquid crystal cells are 70°-80°.

The single transmittance of the first to fourth polarizers is 42%-45%, and the degree of polarization is above 99%.

The angle between the absorption axes of the first to fourth polarizers and the internal friction axes of the first and second TN-LCD liquid crystal cells is 3° to 5°.

Described goggles are fixed on the helmet.

Compared with the prior art, the beneficial effects of the utility model are:

The combination of high-quality TN-LCD liquid crystal box, polarizer and filter is used as a shading lens. The light sensing system on the lens can instantly detect the generation and disappearance of arc light during electric welding, and quickly drive the liquid crystal to shading and change color to achieve safety and effectiveness. The harmful light is filtered to protect the welder's eyes and face from the damage of arc radiation. It can be made into a head-mounted mask integrated with a safety helmet, completely liberating the welder's hands and ensuring safety protection. In terms of uniformity, light dispersion, response speed, and viewing angle dependence, the indicators have all been upgraded to level 1, and the cost of the product can be effectively controlled.

Description of drawings

Fig. 1 is the structural representation of the utility model.

In the figure: 1-UV filter 2-First polarizer 3-First TN-LCD liquid crystal cell 4-Second polarizer 5-Third polarizer 6-Second TN-LCD liquid crystal cell 7-Fourth polarizer Sheet 8 - spacer plain glass.

Detailed ways

The utility model is described in detail below in conjunction with the accompanying drawings, but it should be pointed out that the implementation of the utility model is not limited to the following embodiments.

See Fig. 1, a kind of LCD auto-darkening welding goggles, including UV filter 1, first polarizer 1, first TN-LCD liquid crystal cell 2, second polarizer 3, third polarizer from top to bottom Sheet 5, the second TN-LCD liquid crystal cell 6, the fourth polarizer 7, spacer plain glass 8, the thickness of the first and second TN-LCD liquid crystal cells 3 and 6 is 3-5 μm, to improve the overall picture uniformity.

Wherein, the twist angles of the first and second TN-LCD liquid crystal cells 3 and 6 are 70°-80°. The first to fourth polarizers 2, 4, 5, and 7 have a single transmittance of 42%-45%, and a polarization degree of more than 99%. The included angles between the absorption axes of the first to fourth polarizers 2, 4, 5 and 7 and the internal friction axes of the first and second TN-LCD liquid crystal cells 3 and 6 are 3° to 5°. The goggles are attached to the hard hat.

In the liquid crystal cell made of the principle of TN LCD, the liquid crystal molecules are parallel to the upper and lower substrates of the glass in the bright state, and the liquid crystal molecules form a 90° twist between the upper and lower substrates in the black state.

The light sensing system on the lens can instantly detect the occurrence and disappearance of arc light during electric welding, and quickly drive the liquid crystal to shading and discoloration to achieve safe and effective filtering of harmful light, thereby protecting the welder's eyes and face from arc radiation damage.

Claims (5)

1. a LCD automatic beam change welding goggles, it is characterized in that, comprise UV optical filter, the first polaroid, a TN-LCD liquid crystal cell, the second polaroid, the 3rd polaroid, the 2nd TN-LCD liquid crystal cell, the 4th polaroid, pad element glass from top to bottom successively, first, second described TN-LCD thickness of liquid crystal box is 3 ~ 5 μm.

2. a kind of LCD automatic beam change welding goggles according to claim 1, is characterized in that, the distortion angle of first, second described TN-LCD liquid crystal cell is 70 ° ~ 80 °.

3. a kind of LCD automatic beam change welding goggles according to claim 1, is characterized in that, the described first ~ four polaroid singleton transmittance 42%-45%, degree of polarization more than 99%.

4. a kind of LCD automatic beam change welding goggles according to claim 1, is characterized in that, the described first ~ four polaroid absorbs axle and first, second 3 ° ~ 5 °, TN-LCD liquid crystal cell internal friction axle clamp angle.

5. a kind of LCD automatic beam change welding goggles according to claim 1, it is characterized in that, described protective eye lens is fixed on safety helmet.