Elevator liquid crystal display system provided with backlight control device and control method thereof

Abstract

The invention discloses an elevator liquid crystal display system provided with a backlight control device. The elevator liquid crystal display system comprises a liquid crystal display unit and a display control unit. The liquid crystal display unit comprises a liquid crystal display panel and a backlight source, wherein the backlight source is connected with a backlight control device through a signal transmission line, the backlight control device detects environmental illuminance of the liquid crystal display unit, or detects both environment illuminance of the liquid crystal display unit and brightness of the backlight source and then controls the brightness of the backlight source according to a detection result. The backlight brightness can be regulated automatically according to service environment of the elevator liquid crystal display system, so that the elevator liquid crystal display system can provide information display service for passengers in suitable brightness, and the backlight source is turned down or even turned off when no passengers on landing of an elevator. Accordingly, the elevator liquid crystal display system has the advantages of long service life, low energy consumption, no maintenance, in-time regulation, no affection on calling of the landing of the elevator, and the like, and effectively overcomes defects of maintenance complexity and delayed regulation in the prior art. The invention further discloses a control method of the elevator liquid crystal display system.

Description

technical field [0001] The invention relates to an elevator information display device, in particular to an elevator liquid crystal display system provided with a backlight control device. The invention also relates to a control method of the elevator liquid crystal display system. Background technique [0002] Liquid crystal display devices have been gradually promoted in the information display of elevators in recent years because of their large amount of displayed information, rich content, vividness and many other advantages. [0003] Since the display effect of the liquid crystal display device is easily affected by the brightness of its surrounding environment (ie, ambient illumination), it needs to be adjusted according to the ambient brightness of the floor where it is located. At present, the disclosed technologies related to brightness adjustment of liquid crystal display devices mainly include Japanese Patent Laid-Open No. 10-333628 and Chinese invention patent a...

AI Technical Summary

Problems solved by technology

But there is a common shortcoming in these two methods, that is, both inspectors are required to check regularly to adjust the brightness.

Apparently, the regular inspection method by the inspectors has disadvantages such as cumbersome maintenance, untimely adjustment, and influence on the normal use of landing call during adjustment.

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