Liquid crystal display screen heating device and control method

Abstract

The invention discloses a liquid crystal display screen heating device and a control method. The liquid crystal display screen heating device comprises a metal wire which is arranged on the inner surface of a liquid crystal display screen of an electric energy meter, and a single chip microcomputer, a memory, a temperature detecting circuit and a heating control circuit which are arranged in the electric energy meter; the single chip microcomputer is electrically connected with each of the memory and the temperature detecting circuit; the metal wire is electrically connected with each of a VCC (Voltage to Current Converter) and the heating control circuit; a PWM (Pulse-Width Modulation) switching signal output pin of the single chip microcomputer and a heating control signal TXD pin of the metal wire are both electrically connected with the heating control circuit. The liquid crystal display screen heating device and the control method have the characteristics that the heating control precision is high, and normal display of the liquid crystal display screen is effectively ensured.

Description

technical field [0001] The invention relates to the technical field of liquid crystal display heating, in particular to a liquid crystal display heating device and a control method which have high heating control precision and effectively ensure the normal display of the liquid crystal display. Background technique [0002] Liquid crystal displays are widely used due to their advantages of light weight, small size, and large effective display area. However, some parameters of liquid crystals change greatly under low temperature conditions, resulting in a decrease in the response speed of liquid crystals. At low temperatures (below -25°C), liquid crystals can't even work, and this weakness severely limits the application of liquid crystal displays. [0003] Chinese Patent Authorization Publication No.: CN101655621, the authorized publication date is February 24, 2010, which discloses a heating module for a liquid crystal display. The liquid crystal display includes a first gl...

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Problems solved by technology

[0004] The purpose of the present invention is to overcome the deficiency of low heating control precision of the heating module of the liquid crystal display in the prior art, and provide a liquid crystal display heating device and control device with high heating control precision, which can effectively ensure the normal display of the liquid crystal display method

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