CN205121097U - Last electric delay circuit and LCD screen of LCD screen - Google Patents
Last electric delay circuit and LCD screen of LCD screen Download PDFInfo
- Publication number
- CN205121097U CN205121097U CN201520813183.9U CN201520813183U CN205121097U CN 205121097 U CN205121097 U CN 205121097U CN 201520813183 U CN201520813183 U CN 201520813183U CN 205121097 U CN205121097 U CN 205121097U
- Authority
- CN
- China
- Prior art keywords
- liquid crystal
- crystal display
- module
- switch module
- time delay
- 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.)
- Withdrawn - After Issue
Links
Landscapes
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Liquid Crystal Display Device Control (AREA)
Abstract
The utility model is suitable for a liquid crystal display field provides a last electric delay circuit and LCD screen of LCD screen, and the last electric delay circuit of LCD screen includes: the power module of input electric energy, output height / low level signal's host system, be connected with host system to the time delay module of the last electric delay time of control LCD screen load, height / low level signal to host system output carries out level conversion's level conversion module, input termination power module, control termination level conversion module's messenger can hold, export the load of termination LCD screen, receives level conversion module to control the electronic switch module that switches on or break off with the realization. The utility model discloses a high / the low level signal's that the configuration is used for output on host system control end and with time delay module, level conversion module, power module and the electronic switch module of host system cooperation work, can realize the last electric delay control to the LCD screen, avoid for direct go up that the electricity leads to dodge the screen in the twinkling of an eye or show the harmfully productions of phenomenons such as white light of LCD screen.
Description
Technical field
The utility model belongs to LCDs field, particularly relates to a kind of power-up time delay circuit and liquid crystal display of liquid crystal display.
Background technology
Liquid crystal display or the liquid crystal TV set with liquid crystal display, convert civil power to direct current supply liquid crystal display, to realize the Presentation Function of liquid crystal display mainly through power supply changeover device.
But liquid crystal display in the market or the liquid crystal TV set with liquid crystal display, major part all converts civil power to direct current by power supply changeover device, and the supply liquid crystal that then directly powers on is to screen.Liquid crystal display powered on moment voltage instability, dash current are increased, causes liquid crystal display to dodge the generation of the bad phenomenon such as screen or display white light instantaneously.
Utility model content
The object of the utility model embodiment is the power-up time delay circuit and the liquid crystal display that provide a kind of liquid crystal display, be intended to solve liquid crystal display powered on moment voltage instability, dash current increase, cause liquid crystal display to dodge the problem of the generation of the bad phenomenon such as screen or display white light instantaneously.
The utility model embodiment is achieved in that a kind of power-up time delay circuit of liquid crystal display, and be connected between power supply changeover device and liquid crystal display load, the power-up time delay circuit of described liquid crystal display comprises:
Be connected with described power supply changeover device, to input the supply module of electric energy;
The main control module of high/low level signal is exported by its control end;
Be connected with described main control module, to control the time delay module of the delayed time of described liquid crystal display load;
Input end external power supply, control time delay module, output head grounding described in termination, the high/low level signal exported described main control module carries out the level switch module of level conversion;
Liquid crystal display load described in supply module, the Enable Pin controlling level switch module described in termination, output termination described in input termination, controls to realize the electronic switch module be turned on or off by described level switch module.
Preferably, described supply module comprises multiple power supply unit, and each power supply unit in described multiple power supply unit includes the high frequency choked flow inductance between the input end being connected to described power supply changeover device and described electronic switch module.
Preferably, described supply module comprises three power supply units, and described three power supply units and three rated output voltages are that the power supply changeover device of 12V, 5V and 3.3V connects one to one respectively with rated output voltage.
Preferably, described time delay module comprises divider resistance R1 and delay capacitor C1, and described in described resistance R1 mono-termination, one end of main control module, the other end and described delay capacitor C1 is connected to the control end of described level switch module altogether, the other end ground connection of described electric capacity C1.
Preferably, described level switch module comprises triode Q1, triode Q1, divider resistance R2 and divider resistance R3, the base stage of described triode Q1 is the control end of described level switch module, one end of emitter and described divider resistance R2 and the base stage of described triode Q2 connect altogether, the collector of collector and described triode Q2 forms the output terminal of described level switch module altogether, the emitter of described triode Q2 and one end of described divider resistance R3 connect the Enable Pin forming described level switch module altogether, the other end of described divider resistance R2 and the other end of described divider resistance R3 connect the input end forming described level switch module altogether, divider resistance R4 is also connected with between the Enable Pin of described level switch module and the control end of described electronic switch module.
Preferably, described electronic switch module is metal-oxide-semiconductor, and the grid of described metal-oxide-semiconductor, source electrode and drain electrode form the control end of described electronic switch module, input end and output terminal respectively.
Preferably, the power-up time delay circuit of described liquid crystal display also comprises the filtration module between output terminal and described liquid crystal display load being connected to described electronic switch module.
Preferably, described filtration module comprises filter unit and the charging capacitor C2 in parallel with described filter unit.
Preferably, described filter unit comprises the output terminal of one end and described electronic switch module and described liquid crystal display load connects altogether, the current-limiting resistance R5 of other end ground connection and be connected in parallel on the filter capacitor C3 at described current-limiting resistance R5 two ends.
The utility model embodiment also provides a kind of liquid crystal display, comprises the power-up time delay circuit of foregoing liquid crystal display.
The utility model embodiment compared with prior art, beneficial effect is: by being configured for the control end exporting high/low level signal on the main control module of liquid crystal display, and with the time delay module of this main control module cooperating, level switch module, supply module and electronic switch module, can realize controlling the delayed of liquid crystal display, avoid the moment directly powering on caused to liquid crystal display to dodge the generation of the bad phenomenon such as screen or display white light; By configuring multiple power supply units that power supply adaptors different from multiple rated voltage respectively connects in supply module, make the liquid crystal display of different model in actual use can connect different power supply adaptors to obtain electric energy according to the voltage request of self; By arranging high frequency choked flow inductance in each power supply unit, the stability of the electric current inputted effectively can be ensured; Filtration module comprises divider resistance and delay capacitor, by changing the resistance of divider resistance and the electric capacity size of delay capacitor, controls the delay time of described power-up time delay circuit flexibly; Level switch module comprises the inverter circuit be made up of two triodes, the high/low level signal that main control module exports can be converted to low/high level and export, to realize controlling the break-make of electronic switch module; Electronic switch module is metal-oxide-semiconductor, its low relative to MOS source level/high level exported by level switch module, is turned on or off to control metal-oxide-semiconductor, thus the energising realized liquid crystal display load and power-off control; By arranging filtration module between electronic switch module and liquid crystal display load, the electric current clutter that can effectively produce in filtering circuit, avoids liquid crystal display to occur snow, dodge the phenomenons such as screen; By arranging charging capacitor in filtration module, when described electronic switch module conducting exports electric energy to liquid crystal display load, preferentially charging capacitor can be charged; Disconnect in electronic switch module, when stopping exporting electric energy to liquid crystal display load, charging capacitor, to liquid crystal display load discharge, to ensure the stability of circuit, is effectively avoided electronic switch module to be turned on or off suddenly and is burnt out liquid crystal display load.
Accompanying drawing explanation
Fig. 1 is the basic structure block diagram of the power-up time delay circuit of the liquid crystal display that the utility model one embodiment provides;
Fig. 2 is the basic structure block diagram of the power-up time delay circuit of the liquid crystal display that another embodiment of the utility model provides;
Fig. 3 is the circuit theory diagrams of the power-up time delay circuit of the liquid crystal display that preferred embodiment of the present utility model provides.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the utility model, and be not used in restriction the utility model.
Fig. 1 is the basic structure block diagram of the power-up time delay circuit of the liquid crystal display that the utility model one embodiment provides.
As shown in Figure 1, the power-up time delay circuit 100 of the liquid crystal display that the utility model embodiment provides, is connected between power supply changeover device 200 and liquid crystal display load 300, and the power-up time delay circuit 100 of described liquid crystal display comprises:
Be connected with described power supply changeover device, to input the supply module 10 of electric energy;
The main control module 20 of high/low level signal is exported by its control end PANEL_EN;
Be connected with described main control module 20, to control the time delay module 30 of the delayed time of described liquid crystal display load;
Time delay module 30, output head grounding described in input end external power supply, control termination, carry out the level switch module 40 of level conversion to the high/low level signal of described main control module 20 output;
Described in input termination, liquid crystal display load described in supply module 10, the Enable Pin controlling level switch module 40 described in termination, output termination, controls the electronic switch module 50 realizing being turned on or off by described level switch module 40.
The utility model is configured to the control end that can export high/low level by the I/O interface of the main control module by liquid crystal display, and pass through this control end PANEL_EN and time delay module, level switch module, supply module and electronic switch module cooperating, can realize controlling the delayed of liquid crystal display, make the moment avoiding directly powering on caused to liquid crystal display dodge the generation of the bad phenomenon such as screen or display white light.
Fig. 2 is the basic structure block diagram of the power-up time delay circuit of the liquid crystal display that another embodiment of the utility model provides.
As shown in Figure 2, in the present embodiment, the power-up time delay circuit 100 of described liquid crystal display also comprises the filtration module 60 between output terminal and described liquid crystal display load being connected to described electronic switch module 50.
By arranging filtration module between electronic switch module and liquid crystal display load, the electric current clutter that can effectively produce in filtering circuit, avoids liquid crystal display to occur snow, dodge the phenomenons such as screen.
Fig. 3 is the circuit theory diagrams of the power-up time delay circuit of the liquid crystal display that preferred embodiment of the present utility model provides.
As shown in Figure 3, in the power-up time delay circuit of the liquid crystal display provided at the present embodiment, described supply module 10 comprises for the corresponding multiple power supply units 11 connected of power supply changeover devices different from multiple rated output voltage respectively, each power supply unit 11 in described multiple power supply unit includes the high frequency choked flow inductance between the input end being connected to described power supply changeover device and described electronic switch module 50, in the present embodiment, preferred described supply module 10 comprises three power supply units 11, described three power supply units and three rated output voltages are 12V with rated output voltage respectively, the power supply changeover device of 5V and 3.3V connects one to one, use 12DVCC respectively in figure 3, 5DVCC and 3.3DVCC represents the link of described three power supply units and corresponding three power converters, use FB3 respectively, FB2 and FB1 represents the high frequency choked flow inductance that described three power supply units are corresponding.
Rated output voltage is the power supply changeover device of 12V, 5V and 3.3V is output voltage conventional on the market at present, in a particular application, rated output voltage can be selected as required to be the power supply changeover device of other value, and described multiple power supply unit only can retain one or increase number according to actual needs.
By configuring multiple power supply units that power supply adaptors different from multiple rated voltage respectively connects in supply module, make the liquid crystal display of different model in actual use can connect different power supply adaptors to obtain electric energy according to the voltage request of self; By arranging high frequency choked flow inductance in each power supply unit, the stability of the electric current inputted effectively can be ensured.
As shown in Figure 3, described time delay module 30 comprises divider resistance R1 and delay capacitor C1, described in described resistance R1 mono-termination, one end of main control module 10, the other end and described delay capacitor C1 is connected to the control end of described level switch module 40 altogether, the other end ground connection of described electric capacity C1.
In actual applications, by changing the resistance of divider resistance and the electric capacity size of delay capacitor, the delay time of described power-up time delay circuit is controlled flexibly.
As shown in Figure 3, described level switch module 40 comprises triode Q1, triode Q1, divider resistance R2 and divider resistance R3, the base stage of described triode Q1 is the control end of described level switch module, one end of emitter and described divider resistance R2 and the base stage of described triode Q2 connect altogether, the collector of collector and described triode Q2 forms the output terminal of described level switch module altogether, the emitter of described triode Q2 and one end of described divider resistance R3 connect the Enable Pin forming described level switch module altogether, the other end of described divider resistance R2 and the other end of described divider resistance R3 meet the input end VCC forming described level switch module altogether, divider resistance R4 is also connected with between the Enable Pin of described level switch module 40 and the control end of described electronic switch module 50.In the present embodiment, triode Q1 and triode Q2 all selects P type triode.
Level switch module 40 comprises the inverter circuit be made up of two triodes, the high/low level signal that main control module 20 exports can be converted to low/high level and export, to realize controlling the break-make of electronic switch module 50.
As shown in Figure 3, described electronic switch module 50 is metal-oxide-semiconductor Q3, and the grid of described metal-oxide-semiconductor Q3, source electrode and drain electrode form the control end of described electronic switch module 50, input end and output terminal respectively.In the present embodiment, metal-oxide-semiconductor Q3 selects P channel depletion type metal-oxide-semiconductor.
Low relative to MOS source level/high level that metal-oxide-semiconductor Q3 exports by level switch module 40, is turned on or off to control metal-oxide-semiconductor Q3, thus the energising realized liquid crystal display load 300 and power-off control.
As shown in Figure 3, described filtration module 60 comprises filter unit 61 and the momentary current in parallel with described filter unit 61 suppresses electric capacity C2; Described filter unit 61 comprises current-limiting resistance R5 and is connected in parallel on the filter capacitor C3 at described current-limiting resistance R5 two ends, be connected with described liquid crystal display load 300 after described current-limiting resistance R5 one end and the output terminal of described electronic switch module 50 connect altogether, to export electric energy to described liquid crystal display load 300, the other end ground connection of current-limiting resistance R5, in Fig. 3, the end that connects altogether of the output terminal of current-limiting resistance R5 and electronic switch module 50 is expressed as VLCD.
By arranging charging capacitor C2 in filtration module, when described electronic switch module 50 conducting exports electric energy to liquid crystal display load, preferentially charging capacitor C2 can be charged; Disconnect in electronic switch module, when stopping exporting electric energy to liquid crystal display load, charging capacitor C2, to liquid crystal display load discharge, to ensure the stability of circuit, effectively avoids electronic switch module to be turned on or off suddenly and burns out liquid crystal display load.
The utility model embodiment also provides a kind of liquid crystal display, comprises the power-up time delay circuit 100 of foregoing liquid crystal display.
The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all do within spirit of the present utility model and principle any amendment, equivalent to replace and improvement etc., all should be included within protection domain of the present utility model.
Claims (10)
1. a power-up time delay circuit for liquid crystal display, is connected between power supply changeover device and liquid crystal display load, it is characterized in that, the power-up time delay circuit of described liquid crystal display comprises:
Be connected with described power supply changeover device, to input the supply module of electric energy;
The main control module of high/low level signal is exported by its control end;
Be connected with described main control module, to control the time delay module of the delayed time of described liquid crystal display load;
Input end external power supply, control time delay module, output head grounding described in termination, the high/low level signal exported described main control module carries out the level switch module of level conversion;
Liquid crystal display load described in supply module, the Enable Pin controlling level switch module described in termination, output termination described in input termination, controls to realize the electronic switch module be turned on or off by described level switch module.
2. the power-up time delay circuit of liquid crystal display as claimed in claim 1, it is characterized in that, described supply module comprises for the corresponding multiple power supply units connected of power supply changeover devices different from multiple rated output voltage respectively, and each power supply unit in described multiple power supply unit includes the high frequency choked flow inductance between the input end being connected to described power supply changeover device and described electronic switch module.
3. the power-up time delay circuit of liquid crystal display as claimed in claim 2, it is characterized in that, described supply module comprises three power supply units, and described three power supply units and three rated output voltages are that the power supply changeover device of 12V, 5V and 3.3V connects one to one respectively with rated output voltage.
4. the power-up time delay circuit of liquid crystal display as claimed in claim 1, it is characterized in that, described time delay module comprises divider resistance R1 and delay capacitor C1, described in described resistance R1 mono-termination, one end of main control module, the other end and described delay capacitor C1 is connected to the control end of described level switch module altogether, the other end ground connection of described electric capacity C1.
5. the power-up time delay circuit of liquid crystal display as claimed in claim 1, it is characterized in that, described level switch module comprises triode Q1, triode Q1, divider resistance R2 and divider resistance R3, the base stage of described triode Q1 is the control end of described level switch module, one end of emitter and described divider resistance R2 and the base stage of described triode Q2 connect altogether, the collector of collector and described triode Q2 forms the output terminal of described level switch module altogether, the emitter of described triode Q2 and one end of described divider resistance R3 connect the Enable Pin forming described level switch module altogether, the other end of described divider resistance R2 and the other end of described divider resistance R3 connect the input end forming described level switch module altogether, divider resistance R4 is also connected with between the Enable Pin of described level switch module and the control end of described electronic switch module.
6. the power-up time delay circuit of liquid crystal display as claimed in claim 1, it is characterized in that, described electronic switch module is metal-oxide-semiconductor, and the grid of described metal-oxide-semiconductor, source electrode and drain electrode form the control end of described electronic switch module, input end and output terminal respectively.
7. the power-up time delay circuit of liquid crystal display as claimed in claim 1, it is characterized in that, the power-up time delay circuit of described liquid crystal display also comprises the filtration module between output terminal and described liquid crystal display load being connected to described electronic switch module.
8. the power-up time delay circuit of liquid crystal display as claimed in claim 7, it is characterized in that, described filtration module comprises filter unit and the charging capacitor C2 in parallel with described filter unit.
9. the power-up time delay circuit of liquid crystal display as claimed in claim 8, it is characterized in that, described filter unit comprises the output terminal of one end and described electronic switch module and described liquid crystal display load connects altogether, the current-limiting resistance R5 of other end ground connection and be connected in parallel on the filter capacitor C3 at described current-limiting resistance R5 two ends.
10. a liquid crystal display, is characterized in that, comprises the power-up time delay circuit of the liquid crystal display as described in any one of claim 1 ~ 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520813183.9U CN205121097U (en) | 2015-10-15 | 2015-10-15 | Last electric delay circuit and LCD screen of LCD screen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520813183.9U CN205121097U (en) | 2015-10-15 | 2015-10-15 | Last electric delay circuit and LCD screen of LCD screen |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205121097U true CN205121097U (en) | 2016-03-30 |
Family
ID=55576689
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520813183.9U Withdrawn - After Issue CN205121097U (en) | 2015-10-15 | 2015-10-15 | Last electric delay circuit and LCD screen of LCD screen |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205121097U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
-
2015
- 2015-10-15 CN CN201520813183.9U patent/CN205121097U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105242426A (en) | Power-up delay circuit of liquid crystal display and liquid crystal display | |
| CN103326458B (en) | A kind of external power source and battery powered power supply switch circuit | |
| EP3748959B1 (en) | Display apparatus | |
| CN202711660U (en) | LED display system and LED display unit box body thereof | |
| CN103384436B (en) | LED-backlit constant-current circuit | |
| CN201041734Y (en) | LCD power supply circuit and LCD | |
| CN203659753U (en) | Driving circuit of relay | |
| CN105762781A (en) | Surge current control circuit and power supply device | |
| CN204928349U (en) | Automatic uninterrupted power source device of monocell | |
| CN205121097U (en) | Last electric delay circuit and LCD screen of LCD screen | |
| CN205160851U (en) | Two unification powers | |
| CN206271398U (en) | Drive circuit, control circuit, liquid crystal display and terminal device for liquid crystal display | |
| CN100546355C (en) | A kind of power-off sequential protection circuit of flat-plate television power supply | |
| CN205960636U (en) | Surge current control circuit and power supply unit | |
| CN202145692U (en) | LED flicker filter circuit | |
| CN104252831A (en) | Backlight current adjusting device and method | |
| CN103904874A (en) | Delay soft start circuit used for BOOST-PFC | |
| CN209329961U (en) | A kind of power control circuit and electronic equipment | |
| CN205194297U (en) | AC detection circuitry and LED power supply unit | |
| CN209072364U (en) | A kind of synchronous rectification control chip and circuit | |
| CN203911147U (en) | Intelligent lightning-protection timing socket | |
| CN203851016U (en) | A time-delay soft start circuit used for BOOST-PFC | |
| CN203706002U (en) | Circuit for reducing standby power consumption | |
| CN201839214U (en) | Combined frequency converter | |
| CN205539811U (en) | TFT -LCD liquid crystal display panel's intelligent discharge circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20160330 Effective date of abandoning: 20180529 |
|
| AV01 | Patent right actively abandoned |