CN1392463A - Multiple frequency type high voltage generator - Google Patents
Multiple frequency type high voltage generator Download PDFInfo
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- CN1392463A CN1392463A CN 01129381 CN01129381A CN1392463A CN 1392463 A CN1392463 A CN 1392463A CN 01129381 CN01129381 CN 01129381 CN 01129381 A CN01129381 A CN 01129381A CN 1392463 A CN1392463 A CN 1392463A
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Abstract
The multi-frequency high voltage generator is used in notebook computer display to drive back light cold cathode fluorescent lamp. When the user selects AC converting power mode or battery power mode, the cold cahtode fluorescent lamp is driven in different resonant frequency to fit the multi-frequency high voltage generator and this will alter the resonant frequency and optimize the power consumption.
Description
The present invention relates to a kind of high pressure generating apparatus that is applied to the laptop display, particularly relate to the Multi-Frequency High-Voltage Producing Device that is applied to the laptop display in order to driving backlight type cold-cathode fluorescence lamp.
The application of the backlight type cold-cathode fluorescence lamp of laptop display has been the main flow of present laptop display, must become high-frequency and high-voltage to be driven again a direct current voltage transitions and drive cold-cathode fluorescence lamp, therefore, the high pressure generating apparatus of laptop display just becomes indispensable assembly.
In the past, the high pressure generating apparatus of laptop display is all the single-frequency formula, with regard to laptop assembly plant, the cold-cathode fluorescence lamp of facing different size, label all has different resonance frequencies, need to be limited the resonance frequency and the watt level of high pressure generating apparatus, to satisfy the requirement of each cold-cathode fluorescence lamp different size according to its specific standard.
Moreover the standard with the test of dispatching from the factory if consider the optical efficiency standard, then need have bigger power consumption, causes the battery life test to be difficult for passing through; If consider the power consumption standard, then optical efficiency is relatively poor, causes the lightness test to be difficult for passing through.Therefore, in the actual use of laptop, often alternately operate on the power supply mode that exchanges translative mode and battery mode,, then be difficult to the applied code that reaches more profitable in the face of the problems referred to above.
Therefore, satisfying the interchange translative mode should have different resonance frequencies with the high pressure generating apparatus of battery mode, can satisfy the testing standard that exchanges translative mode and battery mode respectively.
Given this, the object of the present invention is to provide a kind of Multi-Frequency High-Voltage Producing Device that is applied to the laptop display in order to driving backlight type cold-cathode fluorescence lamp.The user can optionally change resonance frequency with under the power supply mode of selecting interchange translative mode or battery mode, and selects best power consumption, drives cold-cathode fluorescence lamp with different resonance frequencies, reaches the applicability of Multi-Frequency High-Voltage Producing Device.
For achieving the above object, comprise at least according to Multi-Frequency High-Voltage Producing Device of the present invention:
One trigger element, in order to a voltage switch control input end, a brightness regulation control input end to be provided, and export a voltage regulator and a pulse width modulation drivers to via this trigger element, control a voltage conversion unit by the output signal of this voltage regulator and this pulse width modulation drivers, to drive this back light member;
One voltage separation vessel in order to power supply supplying mode signal is input to this trigger element, is to exchange translative mode or battery mode to judge this power supply supplying mode;
One feedback circuit is made of a current/voltage converter and rectification integrator series connection, is connected respectively to this back light member and this trigger element, in order to produce feedback signal;
Wherein this power supply supplying mode signal and this feedback signal and adjust this voltage conversion unit frequency by the control signal that this brightness regulation control input end adjustment exports this pulse width modulation drivers and this voltage regulator to, and drive this back light member with optimum resonant frequency.
According to Multi-Frequency High-Voltage Producing Device of the present invention, owing to be provided with the circuit that to adjust the cold-cathode fluorescence lamp driving frequency, the backlight type cold-cathode fluorescence lamp that drives for different brightness regulation controls (resonance frequency) input and by Multi-Frequency High-Voltage Producing Device, all can reach the purpose of lighting the backlight type cold-cathode fluorescence lamp, and the different resonance frequency demands that can meet the brightness of backlight type cold-cathode fluorescence lamp, and satisfy best power consumption.
Brief Description Of Drawings:
Fig. 1 is a Multi-Frequency High-Voltage Producing Device circuit block diagram of the present invention;
Fig. 2 is the operation workflow synoptic diagram that Multi-Frequency High-Voltage Producing Device of the present invention is applied to different resonance frequencies.
Below in conjunction with description of drawings the preferred embodiments of the present invention.
Fig. 1 is a Multi-Frequency High-Voltage Producing Device circuit block diagram of the present invention.As shown in Figure 1, voltage switch control input end 10 inputs to trigger element 30 with brightness regulation control input end 20; Voltage input end inputs to trigger element 30 through voltage separation vessel 35, to drive entire circuit.Through two control signals of trigger element 30 outputs, be coupled respectively to pulse width modulation drivers 40 and voltage regulator 50, this trigger element 30 is a logic control integrated circuit, the function of mainly bear detection, regulating and switching is done best control at different cold-cathode fluorescence lamp specifications with different power demand (exchanging translative mode or battery mode) and is judged.
Wherein, trigger element 30 produces a driving voltage control signal and exports pulse width modulation drivers 40 to; And produce another signal, through voltage regulator 50, regulate the driving voltage of input voltage as voltage conversion unit 60, the driving voltage of this voltage conversion unit 60 is regulated by trigger element 30 and brightness regulation control input end 20 and feedback circuit, and this voltage conversion unit 60 is a variable power amplifier circuit.This driving voltage control signal is to regulate the pulse carrier driving voltage control signal that institute combines through feedback circuit with the control input.
Voltage signal via 60 outputs of above-mentioned voltage conversion unit drives back light member 70, and for example backlight type cold-cathode fluorescence lamp etc. can easily be driven back light member 70, to satisfy different power demands with different resonance frequencies.
The present invention proposes a kind of function of automatic detection back light member 70 frequencies, drive back light member 70 with optimum resonant frequency, mainly being that output signal by voltage separation vessel 35 inputs to trigger element 30, is to exchange translative mode or battery mode with the supply of judging power supply; Current/voltage converter 80 converts the output voltage signal of back light member 70 to feedback current, feeds back to trigger element 30 through rectification integrator 90, to form the loop.Trigger element 30 is with the feedback signal of above-mentioned voltage signal and back light member 70,20 adjust and to export pulse width modulation drivers 40 and voltage regulator 50 to as control signal through the brightness regulation control input end, with the frequency of automatic control voltage conversion unit 60, and with optimum resonant frequency driving back light member 70.
When generally back light member 70 is if any change, for example assemble the cold-cathode fluorescence lamp of different label specifications,, in the past, must change or change the resonance frequency of voltage conversion unit 60, can't do sufficient utilization with regard to the script circuit in order to meet the demand of this label specification.But, because the present invention is through the overall operation of a trigger element 30 as control circuit, so can cooperate feedback circuit to carry out best running and adjustment with back light member 70 by the parameter setting of trigger element 30 at power supply supplying mode, voltage conversion unit 60.
Fig. 2 is applied to the operation workflow synoptic diagram of different resonance frequencies for Multi-Frequency High-Voltage Producing Device of the present invention.At first, detect power supply supplying mode (step 200) through Multi-Frequency High-Voltage Producing Device, generally speaking, comprise battery mode and exchange translative mode, then judge whether to be battery mode? (step 210), if be battery mode, then set battery mode frequency of operation (step 220), be set in about 60KHz usually, if not battery mode, then set and exchange translative mode frequency of operation (step 230), be set in about 70KHz usually.This setting work is finished by the parameter setting of trigger element 30, treat the automatic setting frequency of operation after, drive back light member (step 240) again, finish the running of Multi-Frequency High-Voltage Producing Device.
Though described the preferred embodiments of the present invention above; but be not in order to limit the present invention; those of ordinary skill in the field without departing from the spirit and scope of the present invention; should be able to realize some change and remodeling; therefore, protection scope of the present invention should be as the criterion with the scope that accompanying claims define.
Claims (7)
1. a Multi-Frequency High-Voltage Producing Device is applied to the laptop display, in order to driving back light member, and provides different resonance frequency in order to switch different power supply supplying modes, it is characterized in that comprising at least:
One trigger element, in order to a voltage switch control input end, a brightness regulation control input end to be provided, and export a voltage regulator and a pulse width modulation drivers to via this trigger element, control a voltage conversion unit by the output signal of this voltage regulator and this pulse width modulation drivers, to drive this back light member;
One voltage separation vessel in order to this power supply supplying mode signal is inputed to this trigger element, is to exchange translative mode or battery mode to judge this power supply supplying mode signal;
One feedback circuit is made of a current/voltage converter and rectification integrator series connection, is connected respectively to this back light member and this trigger element, in order to produce a feedback signal; And
Wherein this power supply supplying mode signal and this feedback signal and this brightness regulation control input end adjustment control signal that exports this pulse width modulation drivers and this voltage regulator to is adjusted this voltage conversion unit frequency, and drives this back light member with optimum resonant frequency.
2. as the Multi-Frequency High-Voltage Producing Device of claim 1 record, it is characterized in that described back light member is the backlight type cold-cathode fluorescence lamp.
3. as the Multi-Frequency High-Voltage Producing Device of claim 1 record, it is characterized in that described trigger element is a logic control integrated circuit.
4. as the Multi-Frequency High-Voltage Producing Device of claim 1 record, it is characterized in that described trigger element provides the parameter setting of resonance frequency, in order to be suitable for the frequency of operation of described interchange translative mode and described battery mode.
5. as the Multi-Frequency High-Voltage Producing Device of claim 1 record, it is characterized in that described trigger element provides the switching of resonance frequency, in order to the frequency of operation of selected described interchange translative mode and described battery mode.
6. as the Multi-Frequency High-Voltage Producing Device of claim 1 record, it is characterized in that the frequency of operation of described interchange translative mode is set at about 70KHz.
7. as the Multi-Frequency High-Voltage Producing Device of claim 1 record, it is characterized in that described battery touches the frequency of operation of formula and be set at about 60KHz.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01129381 CN1200327C (en) | 2001-06-14 | 2001-06-14 | Multiple frequency type high voltage generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01129381 CN1200327C (en) | 2001-06-14 | 2001-06-14 | Multiple frequency type high voltage generator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1392463A true CN1392463A (en) | 2003-01-22 |
| CN1200327C CN1200327C (en) | 2005-05-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01129381 Expired - Fee Related CN1200327C (en) | 2001-06-14 | 2001-06-14 | Multiple frequency type high voltage generator |
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| CN (1) | CN1200327C (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100358002C (en) * | 2003-02-27 | 2007-12-26 | 奇美电子股份有限公司 | Apparatus and method for dynamically adjusting discontinuous modal switch frequency value of liquid crystal display |
| CN100388837C (en) * | 2003-04-01 | 2008-05-14 | Lg电子株式会社 | Equipment and method for reducing power consumption of mobile communication terminal back lighting control element |
| CN102034438A (en) * | 2010-10-15 | 2011-04-27 | 深圳市华星光电技术有限公司 | Driving circuit and driving method for backlight module of display device |
| CN101273322B (en) * | 2005-09-29 | 2011-08-24 | 英特尔公司 | Countering power resonance in distribution network |
| CN101202017B (en) * | 2006-12-13 | 2012-05-23 | 瑞萨电子株式会社 | Backlight brightness control for liquid crystal display panel |
-
2001
- 2001-06-14 CN CN 01129381 patent/CN1200327C/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100358002C (en) * | 2003-02-27 | 2007-12-26 | 奇美电子股份有限公司 | Apparatus and method for dynamically adjusting discontinuous modal switch frequency value of liquid crystal display |
| CN100388837C (en) * | 2003-04-01 | 2008-05-14 | Lg电子株式会社 | Equipment and method for reducing power consumption of mobile communication terminal back lighting control element |
| CN101273322B (en) * | 2005-09-29 | 2011-08-24 | 英特尔公司 | Countering power resonance in distribution network |
| CN101202017B (en) * | 2006-12-13 | 2012-05-23 | 瑞萨电子株式会社 | Backlight brightness control for liquid crystal display panel |
| CN102034438A (en) * | 2010-10-15 | 2011-04-27 | 深圳市华星光电技术有限公司 | Driving circuit and driving method for backlight module of display device |
| CN102034438B (en) * | 2010-10-15 | 2013-04-24 | 深圳市华星光电技术有限公司 | Driving circuit and driving method for backlight module of display device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1200327C (en) | 2005-05-04 |
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Assignee: Yingshunda Co., Ltd. Assignor: Inventec Corporation Contract fulfillment period: 2005.7.1 to 2011.6.30 contract change Contract record no.: 2008990000347 Denomination of invention: Multiple frequency type high voltage generator Granted publication date: 20050504 License type: Exclusive license Record date: 2008.9.2 |
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| LIC | Patent licence contract for exploitation submitted for record |
Free format text: EXCLUSIVE LICENCE; TIME LIMIT OF IMPLEMENTING CONTACT: 2005.7.1 TO 2011.6.30 Name of requester: INSHUNDA TECHNOLOGY CO., LTD. Effective date: 20080902 |
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| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20050504 Termination date: 20110614 |