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Method for predicting service life of liquid crystal panel of monitoring and control device

A liquid crystal panel, life-span technology, applied in nonlinear optics, instruments, optics, etc., can solve problems such as increased cost and complexity

Inactive Publication Date: 2016-03-16
CHINA SOUTHERN POWER GRID COMPANY +1
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0004] At present, there is a self-test method that uses a photosensitive sensor to detect the brightness of the LCD backlight, but this method increases the cost and complexity to a certain extent

Method used

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  • Method for predicting service life of liquid crystal panel of monitoring and control device
  • Method for predicting service life of liquid crystal panel of monitoring and control device

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Embodiment Construction

[0015] The patent of the present invention will be further described in detail below with reference to the drawings and specific embodiments, wherein the same reference numerals represent corresponding or identical elements in multiple drawings. figure 1 The front panel 1 of the measurement and control device is shown, which includes a user operation interface 2 and a warning light 5 , and the user operation interface includes a liquid crystal display (LCD) 3 and a key combination 4 . The user can perform operations such as parameter configuration, information query and control on the measurement and control device through the key combination 4 . If the LCD fails, the user cannot operate the measurement and control device and must stop using the device until the LCD is repaired or replaced.

[0016] figure 2 yes figure 1 The 3-part enlarged view of , which shows the specific positions of the used time information of the backlight and the warning information on the LCD scree...

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Abstract

A system for predicting the service life of a liquid crystal panel of a monitoring and control device can monitor the work state of the liquid crystal panel by monitoring the accumulated lightening time of backlight in order to predict the service life of the liquid crystal panel. The system includes a backlight control circuit, a memorizer, a processor, and a communication management panel. In practical application of the liquid crystal panel of the monitoring and control device, a power supply of liquid crystal backlight is controllable; a base pin of the processor can control power-on and power-off of an MOS transistor to achieve light-on and light-off of the liquid crystal screen. During determination of the service life of the liquid crystal screen, when the MOS transistor is powered on, software enables a timer to calculate the power-on time of the MOS transistor and accumulates the power-on time (in seconds), and then the accumulated result is stored in the memorizer E2PROM; the accumulated time is the total work time of the liquid crystal screen and can be read by the system at any time to monitor the work state of the liquid crystal screen; and when the work time approaches a service life threshold of the liquid crystal screen, the communication management panel can give a tip for replacement, and can give an alarm through an indication lamp.

Description

technical field [0001] The invention relates to a method for predicting the life of a liquid crystal panel, in particular to a method for predicting the life of a liquid crystal panel of a measurement and control device, which is suitable for measurement control and automation devices that need to predict the life of a liquid crystal panel in the automation of substations in power systems. Background technique [0002] Whether it is mobile phones and PDAs, or notebook computers, monitors and TVs, LCDs have rapidly replaced traditional display technologies in almost all applications, including measurement and control devices. The LCD itself does not emit light, but uses light output from a light source behind the LCD. When the backlight device fails, it will cause the associated LCD to be unusable. In this case, it is necessary to disassemble the front panel of the measurement and control unit, remove the failed LCD, and install a usable LCD in place, which requires a lot of...

Claims

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Application Information

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IPC IPC(8): G02F1/13
CPCG02F1/1309
Inventor 陶文伟李金张喜铭胡荣许丹莉张伟峰秦红霞刘志超游涛
Owner CHINA SOUTHERN POWER GRID COMPANY
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