Low-temperature heating control module and method for liquid crystal display

Abstract

The invention discloses a low-temperature heating control module and a low-temperature heating control method for a liquid crystal display. The module comprises the liquid crystal display, an ITO heater, a temperature sensor, a temperature sampling circuit, a controller and a heating control circuit. When a system is electrified, a backlight is lightened; the controller judges whether the time reaches an appointed time or not; if the time reaches the appointed time, temperature data is acquired and filtered; the accuracy of the temperature data is guaranteed and the temperature rise ratio of a liquid crystal screen is calculated according to the acquired temperature data and compared with a set value; if the temperature rise ratio is more than the upper limit of the set value, the heating duty ratio is reduced; and if the temperature rise ratio is less than the lower limit of the set value, the heating duty ratio is increased. The module is applied to any liquid crystal display adopting ITO heating, can fulfill the aim of low-temperature quick start, gives consideration to both the heating effect of the liquid crystal display at a low temperature and the temperature uniformity of the liquid crystal display surface in a heating process and avoids nonuniformity caused by too fast temperature rise.

Description

technical field [0001] The invention relates to a liquid crystal display heating module and a method, in particular to a module and a method for heating a liquid crystal display by using an ITO heater. Background technique [0002] Liquid crystal is a special form of matter, which not only has the birefringence characteristic of crystal, but also has the fluidity of liquid. Liquid crystal display is a display device made by using liquid crystal molecules to change their optical properties under the action of an external electric field. It has various types and has been widely used in various displays and electronic instruments. When the liquid crystal module works in a low temperature environment, the viscosity of the liquid crystal increases, the electro-optic effect weakens or disappears and cannot work normally. At this time, the specific performance is: the overall brightness decreases, the contrast ratio decreases rapidly, the color becomes lighter, and the image respon...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a low-temperature heating control module and method for liquid crystal displays, aiming to solve the compatibility problem of the temperature rise rate and temperature uniformity of the liquid crystal screen existing in the heating process using an ITO heater

Images