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Multiple frequency type high voltage generator

A generation device and high-voltage technology, which is applied in the field of multi-frequency high-voltage generation devices, can solve problems such as large power consumption, poor light efficiency, and difficulty in passing battery life tests, and achieve the best power consumption effect

Inactive Publication Date: 2005-05-04
INVENTEC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Furthermore, in terms of factory test standards, if the light efficiency standard is considered, it needs to have a large power consumption, which makes it difficult to pass the battery life test; if the power consumption standard is considered, the light efficiency is poor, making it difficult to test the brightness pass
Therefore, in the actual use of notebook computers, they often alternately operate in the power supply mode of AC conversion mode and battery mode. Faced with the above problems, it is difficult to achieve a more effective applicable standard.

Method used

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  • Multiple frequency type high voltage generator
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  • Multiple frequency type high voltage generator

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Embodiment Construction

[0015] Preferred embodiments of the present invention are described below in conjunction with the accompanying drawings.

[0016] figure 1 It is a circuit block diagram of the multi-frequency high voltage generating device of the present invention. like figure 1 As shown, the voltage switch control input terminal 10 and the brightness adjustment control input terminal 20 are input to the trigger unit 30; the voltage input terminal is input to the trigger unit 30 through the voltage separator 35 to drive the whole circuit. Two control signals are output through the trigger unit 30, which are respectively coupled to the pulse width modulation driver 40 and the voltage regulator 50. The trigger unit 30 is a logic control integrated circuit, which mainly undertakes the functions of detection, adjustment and switching, and is aimed at different cold cathodes. Fluorescent lamp specifications and different power requirements (AC conversion mode or battery mode) to make the best con...

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Abstract

The utility model relates to a multi-frequency high-voltage generating device for driving a backlight cold-cathode fluorescent lamp applied to a notebook computer display. When the user chooses the power supply mode of AC conversion mode or battery mode, the cold cathode fluorescent lamp can be driven at different resonant frequencies to achieve the applicability of the multi-frequency high voltage generator, and the resonant frequency can be selectively changed to select the best power consumption.

Description

technical field [0001] The invention relates to a high-voltage generating device applied to a notebook computer display, in particular to a multi-frequency high-voltage generating device for driving a backlight cold cathode fluorescent lamp applied to a notebook computer display. Background technique [0002] The application of backlight cold cathode fluorescent lamps in notebook computer monitors has become the mainstream of notebook computer monitors at present. To drive cold cathode fluorescent lamps, a DC voltage must be converted into high frequency and high voltage to be driven. Therefore, the high voltage of notebook computer monitors generates The device becomes an indispensable component. [0003] In the past, the high-voltage generating devices of notebook computer monitors were all single-frequency. As far as notebook computer assembly plants are concerned, cold cathode fluorescent lamps of different specifications and brands have different resonant frequencies, w...

Claims

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Application Information

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IPC IPC(8): G06F1/26
Inventor 游一清
Owner INVENTEC CORP