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Backlight control method of instrument

A technology of backlight control and instrumentation, applied in energy-saving control technology, light source, electric light source, etc., can solve problems such as insufficient stability and short life of LED backlight, and achieve the effect of avoiding bad performance and ensuring reliability

Active Publication Date: 2013-10-09
HUIZHOU DESAY SV AUTOMOTIVE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problems of short life and insufficient stability of the above-mentioned LED backlight, the present invention provides a design scheme for software design and its production

Method used

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Embodiment Construction

[0023] In order to allow those skilled in the art to better understand the technical solutions of the present invention, the present invention will be further described below.

[0024] The invention discloses a method for controlling the backlight of an instrument, which includes the following steps.

[0025] (1) Power-on self-inspection, read the stored health status data, the health status data includes the long-on / long-off fault flag, the recovery detection counter and the working time, where the long-on / long-off fault flag is equal to 0 to indicate the normal state, equal to 1 means the fault state is always on, and equal to 2 means the fault state is always off, and the initial value of the recovery detection counter and the working time is 0.

[0026] According to the stored health state data, it is judged whether there is an LED light in the fault state (continuously bright fault light) among the LED lights, if not, go to (13), if there is, go to step (12).

[0027] (1...

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PUM

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Abstract

The invention discloses a backlight control method of an instrument. The method includes a first step of conducting a power-on self-test and storing health state data, produced through the self-test result, of each LED lamp, a second step of selecting the LED lamps for use according to the self-test result in the first step, and a third step of conducting working process monitoring, conducting real-time monitoring on the LED lamps in a working state, and storing the monitoring data. The invention provides the control method with the long service life for instrument backlight design, the service life of an LED is made to meet the requirement for product service life, the reliability of backlight is also guaranteed, and the poor performance that the LED lamps flicker in a backlight situation can be effectively avoided.

Description

technical field [0001] The invention relates to a backlight control method of an instrument. Background technique [0002] The working life of automobiles and construction machinery instruments is generally required to be longer, especially timing products. For example, the hour meter used by construction machinery is a kind of instrument, which is used to record the working time of construction machinery. Generally, the maximum recording time is required to be 99999.9 hours. LEDs are widely used as the backlight source in the current instrument design, that is, LEDs are arranged on the corresponding positions on the PCB on the back of the LCD, dial, etc., and the light emitted by the LED illuminates the scale on the LCD or dial, so that it can provide a clear display in the dark. readings. [0003] Using LED as the backlight of the instrument, the life of the LED will be different due to the influence of its working conditions and working environment, but the current life ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B37/02
CPCY02B20/40
Inventor 杨进超
Owner HUIZHOU DESAY SV AUTOMOTIVE
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