CN2446625Y - Liquid crystal display backlight lamp power source auto controller - Google Patents
Liquid crystal display backlight lamp power source auto controller Download PDFInfo
- Publication number
- CN2446625Y CN2446625Y CN 00212260 CN00212260U CN2446625Y CN 2446625 Y CN2446625 Y CN 2446625Y CN 00212260 CN00212260 CN 00212260 CN 00212260 U CN00212260 U CN 00212260U CN 2446625 Y CN2446625 Y CN 2446625Y
- Authority
- CN
- China
- Prior art keywords
- circuit
- backlight lamp
- pin
- power supply
- backlight
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Liquid Crystal Display Device Control (AREA)
- Liquid Crystal (AREA)
Abstract
The utility model relates to an automatic controller of a backlight lamp power source of a liquid crystal display. The utility model is composed of an AND gate circuit, an upper electric time delay circuit and a drive circuit, wherein, line frequency signals and field frequency signals are connected with the AND gate circuit, the upper electric time delay circuit is connected with the AND gate circuit, and the AND gate circuit is connected with the drive circuit. The upper electric time delay circuit passes through coining to control a backlight lamp with the line frequency signals or the field frequency signals, the backlight lamp is caused to be opened at delay time, the management scheme of a power source of a display of a computer is used, automatic turn-off time with out operation can be set through a keyboard, the backlight lamp can be turned on by knocking any key, automatic control to the backlight lamp of the liquid crystal display can be achieved, the event that the display generates a flower screen can be avoided, and the effects that the lifetime of the backlight lamp is extended and energy is saved can be achieved.
Description
The utility model relates to the design and fabrication technology of power-supply controller of electric.
Need backlight during LCD work, and backlight is the consumable accessory in the LCD, prior art is controlled by manual control and is turn-offed or open, but can not solve the about 2 seconds colored in short-term screen phenomenons that liquid crystal display occurs when powering on, labor management has carelessness, untimely situation to take place again, so the automatic management of backlight liquid crystal display lamp directly determines its life-span and energy consumption.
The purpose of this utility model provides a kind of to the control fully automatically of LCD backlight lamp, avoids the LCD backlight lamp power supply automatic controller of display appearance flower screen phenomenon in the power up.
The purpose of this utility model is to realize like this, constitute by AND circuit, power on delay circuit and driving circuit, line frequency and field frequency signal connect AND circuit, delay circuit and the AND circuit of powering on joined, AND circuit connects driving circuit, by line frequency, field frequency signal have or not to come the open and close backlight, the delay circuit that powers on is through shaping, control backlight with line frequency or field frequency signal, make its Time Delay Opening.
AND circuit, power on delay circuit and driving circuit are: the A of SN75452 integrated package
1Pin meets line frequency or field frequency signal, B
1The node of pin connecting resistance R and capacitor C, the other end ground connection of capacitor C, another termination power of resistance R is succeeded the parallel circuit of electric apparatus coil J and diode D between the Y pin of SN75452 integrated package and the power supply, the contact control backlight inverter of relay J, the A of SN75452 integrated package
2Pin, B
2Pin connects power supply, and 8 pin of SN75452 integrated package connect power supply, 4 pin ground connection.
The utility model has the advantages that, after adopting such scheme, utilize active computer display power manage system scheme, by keyboard to set up do not have the operation under automatically shut down the time, setting range and DOS, WIN95, WIN98, WIN2000 platform specifies are identical, about 1 minute～5 hours, knock the keyboard any key as long as open backlight, the flower that occurs that powers on shields phenomenon by the delay circuit that powers on, and the time-delay of control backlight was opened in 2 seconds.Control fully automatically be can reach, prolongation backlight life-span and energy-conservation effect reached the LCD backlight lamp.
Below in conjunction with drawings and Examples the utility model is elaborated.
Fig. 1 is the utility model hardware circuit principle figure.
Fig. 2 is the utility model structural representation.
Fig. 3 is the utility model embodiment circuit diagram.
As shown in Figure 1, this LCD backlight lamp power supply automatic controller, constitute by AND circuit, power on delay circuit and driving circuit, line frequency and field frequency signal connect AND circuit, and power on delay circuit and AND circuit are joined, and AND circuit connects driving circuit, have or not to come the open and close backlight by line frequency, field frequency signal, power on delay circuit through shaping, control backlight, make its Time Delay Opening with line frequency or field frequency signal.
The structure of embodiment as shown in Figure 2, the circuit of embodiment adopts the 5V direct supply as shown in Figure 3.This technology 386,486,586, Success in Experiment on the various computing machines of P II series integrated circuit board, will be used widely in the industrial control computer field.
Claims (2)
1, LCD backlight lamp power supply automatic controller, it is characterized in that: constitute by AND circuit, power on delay circuit and driving circuit, line frequency and field frequency signal connect AND circuit, delay circuit and the AND circuit of powering on joined, AND circuit connects driving circuit, by line frequency, field frequency signal have or not to come the open and close backlight, the delay circuit that powers on is through shaping, control backlight with line frequency or field frequency signal, make its Time Delay Opening.
2, LCD backlight lamp power supply automatic controller according to claim 1 is characterized in that: AND circuit, power on delay circuit and driving circuit are: the A of SN75452 integrated package
1Pin meets line frequency or field frequency signal, B
1The node of pin connecting resistance R and capacitor C, the other end ground connection of capacitor C, another termination power of resistance R is succeeded the parallel circuit of electric apparatus coil J and diode D between the Y pin of SN75452 integrated package and the power supply, the contact control backlight inverter of relay J, the A of SN75452 integrated package
2Pin, B
2Pin connects power supply, and 8 pin of SN75452 integrated package connect power supply, 4 pin ground connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00212260 CN2446625Y (en) | 2000-06-12 | 2000-06-12 | Liquid crystal display backlight lamp power source auto controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00212260 CN2446625Y (en) | 2000-06-12 | 2000-06-12 | Liquid crystal display backlight lamp power source auto controller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2446625Y true CN2446625Y (en) | 2001-09-05 |
Family
ID=33578805
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00212260 Expired - Fee Related CN2446625Y (en) | 2000-06-12 | 2000-06-12 | Liquid crystal display backlight lamp power source auto controller |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2446625Y (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100592357C (en) * | 2007-04-26 | 2010-02-24 | 海尔集团公司 | Process for startup and closing backlight lamp of liquid crystal screen and control system thereof |
| CN101465112B (en) * | 2007-12-19 | 2012-05-23 | 鸿富锦精密工业（深圳）有限公司 | Display |
| CN103033339A (en) * | 2012-12-14 | 2013-04-10 | 京东方科技集团股份有限公司 | Lighting jig |
| CN103297142A (en) * | 2013-05-08 | 2013-09-11 | 青岛海信宽带多媒体技术有限公司 | Method based on FPGA for eliminating optical power overshoot and optical module |
| CN103531166A (en) * | 2010-06-28 | 2014-01-22 | 瀚宇彩晶股份有限公司 | Method for improving image contrast of display device |
| CN105242426A (en) * | 2015-10-15 | 2016-01-13 | 合肥惠科金扬科技有限公司 | Power-up delay circuit of liquid crystal display and liquid crystal display |
| CN107871478A (en) * | 2017-12-26 | 2018-04-03 | 深圳Tcl新技术有限公司 | Drive circuit, method and the display device of display module |
| CN110880302A (en) * | 2019-12-05 | 2020-03-13 | 山东超越数控电子股份有限公司 | LCD screen anti-screen-splash system based on domestic processor and implementation method |
-
2000
- 2000-06-12 CN CN 00212260 patent/CN2446625Y/en not_active Expired - Fee Related
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100592357C (en) * | 2007-04-26 | 2010-02-24 | 海尔集团公司 | Process for startup and closing backlight lamp of liquid crystal screen and control system thereof |
| CN101465112B (en) * | 2007-12-19 | 2012-05-23 | 鸿富锦精密工业（深圳）有限公司 | Display |
| CN103531166A (en) * | 2010-06-28 | 2014-01-22 | 瀚宇彩晶股份有限公司 | Method for improving image contrast of display device |
| EP2743905B1 (en) * | 2012-12-14 | 2018-10-17 | Boe Technology Group Co. Ltd. | Lighting jig |
| CN103033339A (en) * | 2012-12-14 | 2013-04-10 | 京东方科技集团股份有限公司 | Lighting jig |
| CN103033339B (en) * | 2012-12-14 | 2015-07-01 | 京东方科技集团股份有限公司 | Lighting jig |
| US9778322B2 (en) | 2012-12-14 | 2017-10-03 | Boe Technology Group Co., Ltd. | Lighting jig |
| CN103297142A (en) * | 2013-05-08 | 2013-09-11 | 青岛海信宽带多媒体技术有限公司 | Method based on FPGA for eliminating optical power overshoot and optical module |
| CN103297142B (en) * | 2013-05-08 | 2016-09-07 | 青岛海信宽带多媒体技术有限公司 | Method and the optical module of optical power overshoot is eliminated based on FPGA |
| CN105242426A (en) * | 2015-10-15 | 2016-01-13 | 合肥惠科金扬科技有限公司 | Power-up delay circuit of liquid crystal display and liquid crystal display |
| CN105242426B (en) * | 2015-10-15 | 2018-05-29 | 合肥惠科金扬科技有限公司 | The power-up time delay circuit and liquid crystal display of a kind of liquid crystal display |
| CN107871478A (en) * | 2017-12-26 | 2018-04-03 | 深圳Tcl新技术有限公司 | Drive circuit, method and the display device of display module |
| CN107871478B (en) * | 2017-12-26 | 2020-11-13 | 深圳Tcl新技术有限公司 | Driving circuit and method of display module and display equipment |
| CN110880302A (en) * | 2019-12-05 | 2020-03-13 | 山东超越数控电子股份有限公司 | LCD screen anti-screen-splash system based on domestic processor and implementation method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |