CN203587915U - Power supply control circuit for TCON board of liquid crystal screen - Google Patents
Power supply control circuit for TCON board of liquid crystal screen Download PDFInfo
- Publication number
- CN203587915U CN203587915U CN201320659628.3U CN201320659628U CN203587915U CN 203587915 U CN203587915 U CN 203587915U CN 201320659628 U CN201320659628 U CN 201320659628U CN 203587915 U CN203587915 U CN 203587915U
- Authority
- CN
- China
- Prior art keywords
- power supply
- liquid crystal
- crystal display
- chip
- control circuit
- 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 - Lifetime
Links
- 239000004973 liquid crystal related substance Substances 0.000 title claims abstract description 30
- 238000006243 chemical reaction Methods 0.000 claims abstract description 21
- 238000012544 monitoring process Methods 0.000 claims abstract description 20
- 230000002159 abnormal effect Effects 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract 1
- 230000005611 electricity Effects 0.000 description 5
- 239000003990 capacitor Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Images
Landscapes
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
Abstract
The utility model discloses a power supply control circuit for a TCON (Timer Control Register) board of a liquid crystal screen. The power supply control circuit comprises a voltage monitoring chip and a linear power supply conversion chip, wherein the voltage monitoring chip is used for acquiring the voltage signal of a power supply and outputting a control signal to the linear power supply conversion chip, and the linear power supply conversion chip is connected with the power supply and supplies the TCON board of the liquid crystal screen with power. The power supply control circuit can effectively prevent abnormal display failures, such as white screen and blurred screen, and particularly, has remarkable effects in rapid on-off tests. Meanwhile, the adaptability of the product to the power supply is improved by the power supply control circuit, so that the failures of the product due to the difference of power supply properties cannot occur.
Description
Technical field
The utility model relates to the power-supplying circuit of liquid crystal display TCON plate.
Background technology
Liquid crystal display drives field, the power supply control of TCON plate has strict sequential requirement, power supply power on and lower electricity has corresponding time to control requirement, if can not be according to powering on and the time of lower electricity is carried out the sequential control of power supply, liquid crystal display there will be the fault that cannot normally show.Prevent the appearance of this type of fault, prior art, by the Enable Pin of the power supply chip of controller control liquid crystal display, meets the TCON plate power supply timing of liquid crystal display.But when harsh power supply environment, liquid crystal display TCON plate still can show that abnormal fault occurs because of unstable the causing of power-supply system.
Utility model content
Technical problem to be solved in the utility model is to realize a kind of use reliably, avoids showing the liquid crystal display TCON plate power-supplying circuit of fault.
To achieve these goals, the technical solution adopted in the utility model is: a kind of liquid crystal display TCON plate power-supplying circuit, comprise voltage monitoring chip and linear power supply conversion chip, described voltage monitoring chip gathers power supply voltage signal, and outputing control signals to linear power supply conversion chip, described linear power supply conversion chip connects power supply and supplies power to liquid crystal display TCON plate.
Described voltage monitoring chip model is TPS3803-01QDCKRQ1.
Described linear power supply conversion chip model is L6932D1.2.
The SENCE pin of described voltage monitoring chip connects power supply, and exports the enable pin EN of low and high level to linear power supply conversion chip by RESET pin.
The utility model has the advantage of, this power-supplying circuit can prevent that " screen in vain ", " flower screen " etc. from showing the appearance of abnormal fault effectively, particularly evident in fast open shutdown test especially; This power-supplying circuit has improved the adaptability of product for power supply simultaneously, can not cause because of the difference of power supply characteristic the appearance of product bug.
Accompanying drawing explanation
Below the mark in content and figure that in the utility model instructions, every width accompanying drawing is expressed is briefly described:
Fig. 1 is liquid crystal display TCON plate power-supplying circuit structural representation;
Fig. 2 is that in Fig. 1, voltage monitoring chip threshold values arranges schematic diagram.
Embodiment
The power-supplying circuit of this patent liquid crystal display TCON plate, for the power supply control of liquid crystal display TCON plate, by the change in voltage to power supply, is controlled the opening and closing of liquid crystal display TCON plate power supply voluntarily.The voltage monitoring chip U1 of electricity Route monitoring externally fed voltage fluctuation, the linear power supply conversion chip U2 that carries out supply voltage conversion forms, by the fluctuation of supply voltage supervision chip monitoring supply voltage, then control the Enable Pin of power conversion chip, thereby realize the opening and closing control of the power supply to TCON plate.Realize liquid crystal display TCON plate power supply power on and time of lower electricity is controlled, prevent that liquid crystal display from showing the appearance of abnormal failure.
Specifically known referring to Fig. 1, voltage monitoring chip U1 is for the voltage monitoring of power supply (VCC_IN), preferably adopt TPS3803-01QDCKRQ1 chip, linear power supply conversion chip U2, for converting power supply (VCC_IN) to liquid crystal display power supply (AMLCD_VCC), preferably adopts L6932D1.2 chip.The SENCE pin of voltage monitoring chip U1 connects power supply, gathers power supply voltage signal, the enable pin EN by its RESET pin output low and high level to linear power supply conversion chip U2, i.e. linear power supply conversion chip U2 output control signal.Wherein resistance R 1 and R2 are the configuration resistance of power supply (VCC_IN) enable voltage, and resistance R 3 and R4 are the supply voltage configuration resistance of liquid crystal display TCON.Electric capacity
C1, C2, C3, C4, C5, C6, C7, the filter capacitor that C8 is power supply.
Voltage monitoring chip U1 internal preset has threshold voltage (VIT), enable voltage by threshold voltage and VCC_IN compares, as shown in Figure 2, when the enable voltage (VSENCE) that VCC_IN sends into voltage monitoring chip U1 through dividing potential drop is greater than threshold voltage (VIT), RESET output high level (H), now linear power supply conversion chip U2 work, gives liquid crystal display TCON power supply; When the enable voltage (VSENCE) of sending into voltage monitoring chip U1 through dividing potential drop as VCC_IN is less than threshold voltage (VIT), RESET is output as low level (L), and now linear power supply conversion chip U2 does not work, and stops powering to liquid crystal display TCON.Therefore, only have VCC_IN to be greater than setting voltage value, liquid crystal display TCON plate work, thus avoided TCON power supply to power on or the oversize liquid crystal display causing of time of lower electricity shows that abnormal failure occurs.
By reference to the accompanying drawings the present invention is exemplarily described above; obviously the utility model specific implementation is not subject to the restrictions described above; as long as adopted the improvement of the various unsubstantialities that method of the present invention design and technical scheme carry out; or without improving, design of the present invention and technical scheme are directly applied to other occasion, all within protection domain of the present utility model.
Claims (4)
1. a liquid crystal display TCON plate power-supplying circuit, it is characterized in that: comprise voltage monitoring chip (U1) and linear power supply conversion chip (U2), described voltage monitoring chip (U1) gathers power supply voltage signal, and outputing control signals to linear power supply conversion chip (U2), described linear power supply conversion chip (U2) connects power supply and supplies power to liquid crystal display TCON plate.
2. liquid crystal display TCON plate power-supplying circuit according to claim 1, is characterized in that: described voltage monitoring chip (U1) model is TPS3803-01QDCKRQ1.
3. liquid crystal display TCON plate power-supplying circuit according to claim 1 and 2, is characterized in that: described linear power supply conversion chip (U2) model is L6932D1.2.
4. liquid crystal display TCON plate power-supplying circuit according to claim 3, it is characterized in that: the SENCE pin of described voltage monitoring chip (U1) connects power supply, and export the enable pin EN of low and high level to linear power supply conversion chip (U2) by RESET pin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320659628.3U CN203587915U (en) | 2013-10-24 | 2013-10-24 | Power supply control circuit for TCON board of liquid crystal screen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320659628.3U CN203587915U (en) | 2013-10-24 | 2013-10-24 | Power supply control circuit for TCON board of liquid crystal screen |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203587915U true CN203587915U (en) | 2014-05-07 |
Family
ID=50585809
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320659628.3U Expired - Lifetime CN203587915U (en) | 2013-10-24 | 2013-10-24 | Power supply control circuit for TCON board of liquid crystal screen |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203587915U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106448586A (en) * | 2016-09-27 | 2017-02-22 | 青岛海信电器股份有限公司 | Liquid crystal apparatus and liquid crystal screen power supply switch control method |
| CN107390962A (en) * | 2017-08-16 | 2017-11-24 | 祝小军 | A kind of electromagnetism electric capacity is double to touch the ultra-thin education touch one-piece machine of Rimless ultra-narrow |
| CN109407356A (en) * | 2017-08-17 | 2019-03-01 | 上海帆声图像科技有限公司 | Display screen powers on voltage-stabilizing power supply system and display screen powers on pressure stabilizing method of supplying power to |
-
2013
- 2013-10-24 CN CN201320659628.3U patent/CN203587915U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106448586A (en) * | 2016-09-27 | 2017-02-22 | 青岛海信电器股份有限公司 | Liquid crystal apparatus and liquid crystal screen power supply switch control method |
| CN106448586B (en) * | 2016-09-27 | 2019-06-28 | 青岛海信电器股份有限公司 | The method of controlling switch of the power supply of liquid-crystal apparatus and liquid crystal display |
| CN107390962A (en) * | 2017-08-16 | 2017-11-24 | 祝小军 | A kind of electromagnetism electric capacity is double to touch the ultra-thin education touch one-piece machine of Rimless ultra-narrow |
| CN109407356A (en) * | 2017-08-17 | 2019-03-01 | 上海帆声图像科技有限公司 | Display screen powers on voltage-stabilizing power supply system and display screen powers on pressure stabilizing method of supplying power to |
| CN109407356B (en) * | 2017-08-17 | 2021-12-03 | 上海帆声图像科技有限公司 | Power-on voltage-stabilizing power supply system and method for display screen |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN202886927U (en) | Controllable delayed power-off circuit used after halt of engineering machine | |
| CN104750568B (en) | A kind of watchdog circuit of microcontroller exception forced resetting | |
| CN203587915U (en) | Power supply control circuit for TCON board of liquid crystal screen | |
| CN204203947U (en) | Two separate display is with aobvious android terminal | |
| CN104734327A (en) | Automatic switchover equipment of reserve power supply | |
| CN203761526U (en) | Television online programming circuit | |
| CN203085882U (en) | Intelligent remote control socket | |
| CN201903771U (en) | Singlechip reset circuit | |
| CN202487118U (en) | Device for lowering standby power consumption | |
| CN203911147U (en) | Intelligent lightning-protection timing socket | |
| CN104820457B (en) | Voltage adaptive Multipath digital quantity input card | |
| CN202649916U (en) | +3.3V and +5V time sequence control circuit for computer mainboard | |
| CN204731598U (en) | Based on the intelligent express delivery cabinet that I2C controls | |
| CN201298888Y (en) | Clock circuit and television with same | |
| CN204028334U (en) | A kind of fire-fighting power supply sensor | |
| CN201926699U (en) | Low-voltage circuit for power failure detection | |
| CN205539811U (en) | TFT -LCD liquid crystal display panel's intelligent discharge circuit | |
| CN103108472B (en) | Intermittent service dimming light-emitting diode (LED) lamp drive circuit | |
| CN201754264U (en) | Computer power monitoring device and computer | |
| CN206268047U (en) | Fire water-supply tele-control system | |
| CN204803494U (en) | A general type loom interface board for electric jacquard machine | |
| CN204290795U (en) | A kind of intelligent water pump overall-in-one control schema plate | |
| CN204462675U (en) | Hotel guest room control system module group | |
| CN204009465U (en) | For the relay pwm control circuit of panel type electronic thermostat | |
| CN205049905U (en) | Automatic outage power down switch |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140507 |
|
| CX01 | Expiry of patent term |