Divisional light and dark automatic colour changing control method for liquid crystal sunglasses and control device thereof

Abstract

The invention relates to a divisional light and dark colour change control method for liquid crystal sunglasses and a control device thereof. Liquid crystal lens are divided into a plurality of longitudinal distribution parallel liquid crystal bars, the luminousness is controlled by the control voltage applied to every liquid crystal bar by controllers; the sensing signal of the external average illuminance is input to the controllers, the average light transmission rate of the whole liquid crystal lens is controlled by an average control voltage output by controllers; the incident angle of an intense light source to the liquid crystal lens is measured by an angular transducer, the liquid crystal bar at the intersection point between the link of the intense light source and human eyes andthe liquid crystal lens is selected according to the incident angle; the control voltage of the glare-shielding bar is increased to make the bar a black area. The total light transmission rate and the distribution of the light and dark colour change areas of the liquid crystal lens can automatically vary with the environmental illuminance and the angle of the strong incident light, the light-to-dark transition region is arranged on the liquid crystal lens and the lens has the advantages of simple structure, small volume and low cost.

Description

Control method and control device for automatic color change of light and shade in liquid crystal sunglasses technical field The invention relates to a pair of sunglasses, in particular to a control method and a control device for automatic discoloration of liquid crystal sunglasses. Background technique Liquid crystal sunglasses can change the light transmittance of the lens by changing the voltage applied to the liquid crystal lens. There are some liquid crystal glasses in the prior art, which divide the liquid crystal lens into a plurality of adjacent liquid crystal strips and arrange them in one direction. Different voltages are applied to each liquid crystal bar, and the shadow effect of different light and dark area layers can appear on the lens. The difference in light transmittance between adjacent bars of this type of lens is fixed and has no automatic adjustment function, so it cannot adapt to changes in the direction of incident light. In addition, the average l...

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Problems solved by technology

The control methods of these glasses are complicated, and the design needs to realize their functions through large, heavy, and expensive electronic control devices. Due to their poor practicability, they have not been commercialized so far.

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