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Method of digital system low-voltage stabilizing work

A stable working, low-voltage technology, applied to TV system components, color TV components, TVs, etc., can solve problems such as voltage drop, output voltage reduction, and battery voltage is easy to generate large, to ensure system safety , the effect of prolonging the service life

Inactive Publication Date: 2007-01-03
FOSHAN PREMIER SCI & TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

When the battery maintains a sufficient charge, a slight applied load does not cause any noticeable problems, while when the battery maintains a small charge, the output voltage without any load is will also decrease, if a large load is applied at this time, the battery voltage will easily produce a large voltage drop

Method used

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  • Method of digital system low-voltage stabilizing work
  • Method of digital system low-voltage stabilizing work
  • Method of digital system low-voltage stabilizing work

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Embodiment Construction

[0035] Please refer to figure 1 , the F / W program in the figure is stored in the FLASH IC (flash memory chip), and the boot program run by the DSP (Digital Signal Processing, digital signal processing) will move the F / W program to the DRAM (Dynamic Random Access Memory) and run it . In this way, the DSP can switch the image mode according to the user's operation. If the DSP needs to capture the external image in this mode (the DSP senses the outside world by controlling the lens LENS and the charge-coupled component CMOS), the light intensity perceived by the charge-coupled component is converted into electrical The signal is processed by DSP in DRAM, and finally a picture is stored in FLASH IC. Of course, the DSP also needs to decide whether it needs to control the flash unit for supplementary light according to the light intensity of the outside world. Before filling the flash light, it is necessary to check whether the charging capacitor has enough power, otherwise, the D...

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Abstract

A method for carrying out stable operation on low voltage of digital system includes judging whether power supply voltage is turn-off voltage or near to turn-off voltage or not and entering re-electricity-saving load mode if it is or otherwise continuously judging turn-off voltage state, controlling LCD backlight PWM frequency or duty ratio, finalizing storage file or corresponding function of each mode, judging again whether power supply voltage is turn-off voltage or near to turn-off voltage or not and entering system switching off course if it is or otherwise returning to re-electricity- saving load mode.

Description

【Technical field】 [0001] The invention relates to a control method of a digital system, in particular to a method for keeping the digital system working stably at low voltage. 【Background technique】 [0002] In recent years, electronic cameras that process images from CCD imagers and store them in recording media, such as flash memory, are becoming more and more popular, especially electronic cameras that are equipped with various accessories such as electronic flash devices and LCD monitors. . [0003] Such electronic cameras generally use batteries and accumulators as power sources. Therefore, based on the requirement of a long service life of the battery itself, it is necessary to reduce the load of the battery as much as possible, and the variation of the battery voltage is also limited. For an electronic camera equipped with an electronic flash device, an LCD monitor, etc., the load of the electronic flash device, LCD monitor, etc. that receives power from a battery an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N5/232G05B19/04
Inventor 文志辉
Owner FOSHAN PREMIER SCI & TECH CO LTD