CN207068445U - A kind of TFT liquid crystal display screen drive boards - Google Patents
A kind of TFT liquid crystal display screen drive boards Download PDFInfo
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- CN207068445U CN207068445U CN201721007747.5U CN201721007747U CN207068445U CN 207068445 U CN207068445 U CN 207068445U CN 201721007747 U CN201721007747 U CN 201721007747U CN 207068445 U CN207068445 U CN 207068445U
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Abstract
A kind of drive circuit is the utility model is related to, more particularly, to the TFT liquid crystal display screen drive boards in a kind of industrial electrical equipment.A kind of TFT liquid crystal display screen drive boards, including PCB, drive circuit and electric power management circuit, the drive circuit is with video decoding chip (8) for core, video decoding chip uses MST705 or MST703, the road CVBS video signal input terminals of PCB peripheral hardware 4 (13) or/and 1 road VGA signal input parts (14) and key-press input interface (9), (12) the CVBS vision signals or/and VGA vision signals reach video decoding chip through signal anti-interference process circuit, (7) the TTL/LVDS signal output parts of the video decoding chip connect liquid crystal display signal input interface；(2) DC/DC power management modules provide main power source for whole driving plate.The utility model TFT liquid crystal display screen drive boards can adapt to the severe industrial environment that temperature is high, environment is poor, it can be ensured that TFT liquid crystal displays steady operation under high temperature, strongly disturbing industrial environment.
Description
Technical field
A kind of drive circuit is the utility model is related to, more particularly, to a kind of suitable for high temperature, low temperature, strong interference environment
TFT liquid crystal display screen drive boards in industrial electrical equipment.
Background technology
Traditional TFT liquid crystal display screen drive boards typically only support a kind of dc source of narrow range to power, in environment temperature
In the higher and stronger industrial environment occasion of signal interference, commercial driving plate just can not stably work.In face of TFT-LCD screen displays
Show the fast development of industry, it is clear that the driving plate of traditional TFT liquid crystal displays can not support the liquid crystal display of high reliability.
Therefore, in order to adapt to industry development and Industry Control demand, urgent need invents a kind of new TFT liquid crystal display screen drive boards,
Can be under high temperature, strongly disturbing industrial environment, it is ensured that the work of the stabilization of liquid crystal display.
The content of the invention
In view of the shortcomings of the prior art, proposing a kind of TFT liquid crystal display screen drive boards, the driving plate can adapt to the utility model
Temperature is high, the severe industrial environment of environment difference, it can be ensured that TFT liquid crystal displays are stable under high temperature, strongly disturbing industrial environment
Work.
Technical scheme used by the utility model：
A kind of TFT liquid crystal display screen drive boards, including PCB, drive circuit and electric power management circuit, the driving electricity
With video decoding chip (8) for core, the video decoding chip uses MST705 or MST703, the tunnel of PCB peripheral hardware 4 on road
CVBS video signal input terminals (13) or/and 1 road VGA signal input parts (14) and key-press input interface (9), CVBS videos letter
Number or/and VGA vision signals (12) reach video decoding chip through signal anti-interference process circuit, the video decoding chip
(7) TTL/LVDS signal output parts connect liquid crystal display signal input interface；(2) DC/DC power management modules carry for whole driving plate
For main power source, wherein (5) LDO power supplys provide working power for video decoding chip, and the DC/DC power management modules are (2) simultaneously
(4) and backlight drive (3) interface positive and negative pressure circuit is provided for TFT liquid crystal displays.
(2) described TFT liquid crystal display screen drive boards, DC/DC power management modules use LM2596 power supply chips, power input
(1) end is in series with resettable fuse and antisurge suppressor TVS and ∏ type filter circuit, power input is protected by self- recoverage
Danger and one-level antisurge suppressor TVS and ∏ type filter circuit are input to power supply chip, the power output end of the power supply chip
One-level antisurge suppressor TVS is provided with again, is then input to the power end of video decoding chip；The power supply chip or use
MIC4576 or TD7590.
The beneficial effects of the utility model：
1st, the utility model TFT liquid crystal display screen drive boards, drive circuit is using Video Decoder as core, the decoder chip
Reliable operation under high and low temperature, stably, strong adaptability, coordinates corresponding power supply processing circuit, the protection of AV signaling interfaces, VGA signals
Interference prevention, it can be worked in wider DC voltage range, industrial occasions adaptability is extremely strong, adapts to small-medium size number instantly
Word TFT liquid crystal display demands, it is ensured that phenomena such as liquid crystal display is not in flower screen, mess code in use.
2nd, the utility model TFT liquid crystal display screen drive boards, it is simple in construction, it is reasonable in design, support Width funtion DC8~24V power supplys
Power supply, it is safe and reliable.Power import management circuit uses ∏ type filter circuits, can recover automatically after excessively stream, overheat, and
With power supply treatment measures such as power surge suppression, the reliably working of driving plate ensure that.
3rd, power source design conversion chip LM2596（Design compatible MIC4576 or TD7590 chips）, power input series connection
There are resettable fuse and antisurge suppressor TVS to add ∏ type filter circuits, the suppression of one-level surge is added again in power output end
Device TVS processed, two-stage surge TVS suppress to absorb, it is ensured that it is steady that power supply enters driving plate voltage.
Brief description of the drawings
Fig. 1 is power management module circuit theory diagrams of the present utility model；
Fig. 2 is video decoding of the present utility model and storage circuit schematic diagram；
Fig. 3 is the block diagram of system of the utility model TFT liquid crystal display screen drive boards.
Embodiment
Below by embodiment, the technical solution of the utility model is described in further detail.
Embodiment 1
Referring to Fig. 2, Fig. 3, the utility model TFT liquid crystal display screen drive boards, including PCB, drive circuit and power supply
Circuit is managed, for drive circuit with video decoding chip (8) for core, the video decoding chip uses MST705（Or MST703）
Complete 4 road CVBS videos decodings and VGA video decoding functions.The road CVBS video signal input terminals of PCB peripheral hardware 4 (13) or/
With 1 road VGA signal input parts (14) and key-press input interface (9), the CVBS vision signals or/and VGA vision signals are through signal
(12) anti-interference process circuit reaches video decoding chip, (7) the TTL/LVDS signal output parts of the video decoding chip connect liquid
Crystalline substance screen signal input interface；(2) DC/DC power management modules provide main power source for whole driving plate, wherein LDO power supplys be (5) regarding
Frequency decoding chip provides working power, (2) the DC/DC power management modules provide positive and negative pressure circuit for TFT liquid crystal displays simultaneously
And backlight drive (3) interface (4).
The utility model TFT liquid crystal display screen drive boards, video decoding chip use the MST705 of Taiwan stars at dawn semiconductor company
(8), the centre position of PCB is placed on, it is the core devices of whole plate.CVBS vision signals or VGA video signal interfaces
Positioned at the following of driving plate, information source is facilitated to access.Composite video signal input interface strong adaptability：Support AV videos lotus seat peace
Dress and 90 ° of BNC sockets are installed, and according to user reasonable selection can be needed to configure.(10) 12M crystal oscillators are provided needed for work for MST705
Clock, adjacent MST705 are placed, and storage chip is (11)（Fiash program storages use the 25X40 chips of magnificent nation, and parameter configuration is deposited
Reservoir uses the micro- die semiconductor company 24LC16BI in the U.S.）Placed against MST705.Key-press input interface is (9) positioned at circuit board
Right side and the place of upside two, mainly fit structure are convenient to be operated.Backlight drive part is (3) using 6004 large power high efficiencies
Constant current backlighting scheme, TTL/LVDS signal (7) carry-out bit easy to connect positioned at circuit board upper left position, and liquid crystal display backlight mouth
In the middle top position of circuit board, it is easy to connect with liquid crystal display screen wire, power input is located at the lower left of circuit board.
Embodiment 2
Referring to Fig. 1, the TFT liquid crystal display screen drive boards of the present embodiment, it is with the difference of embodiment 1：DC/DC power supply pipes
(2) reason module uses LM2596 power supply chips（Design compatible MIC4576 or TD7590 chips）, (5) LDO circuit is video decoding core
Piece provides working power.The power input of DC/DC power management modules is in series with resettable fuse and antisurge suppressor
TVS and ∏ type filter circuits, power input is by self- recoverage insurance and one-level antisurge suppressor TVS and ∏ type filter circuit
Power supply chip is input to, the power output end of the power supply chip is provided with one-level antisurge suppressor TVS, is then input to and regards again
The power end of frequency decoding chip.
Power management module suppresses to absorb using two-stage surge TVS and ∏ type filter circuits, it can be ensured that power supply, which enters, to be driven
Dynamic plate voltage is steady, ensures to be input to the clean and stable principal voltage of driving plate.Power management module have after overcurrent overheat from
The power supply treatment measures such as dynamic recovery, power surge suppression, ensure that the reliably working of driving plate.Support 8~24V of direct current Width funtion
Power supply, can be applied under severe industrial occasions.
Embodiment 3
Referring to Fig. 1, the TFT liquid crystal display screen drive boards of the present embodiment, unlike embodiment 1 or embodiment 2：Power input
Terminal uses 15 core D-SUB interfaces of standard using KF2EDGR3.81-3.81 band ear inverse plugging formula designs, USB interface.
Power input terminal has fully ensured that power connection using KF2EDGR3.81-3.81 band ear inverse plugging formula designs
Reliability, support the input of direct current Width funtion：DC supply input scope 8V-24V；USB interface uses 15 core D-SUB of standard
Interface, general VGA cable may be connected to information source.
The utility model supports the TTL interfaces liquid crystal display and LVDS interface liquid crystal display of below 1280x800 resolution ratio.The liquid
Brilliant driving plate is using Video Decoder as core, and reliable operation under the chip high and low temperature, stably coordinates corresponding power supply processing electricity
Road, the protection of AV signaling interfaces, VGA signaling interfaces shield, can work in wider DC voltage range, industrial occasions adaptability
It is extremely strong, adapt to small-medium size numeral TFT liquid crystal display demands instantly, it is ensured that liquid crystal display is not in that flower shields, disorderly in use
Phenomena such as code, it can adapt to the severe industrial environment that temperature is high, environment is poor.
Claims (3)
1. a kind of TFT liquid crystal display screen drive boards, including PCB, drive circuit and electric power management circuit, the drive circuit
With video decoding chip (8) for core, it is characterised in that：The video decoding chip uses MST705 or MST703, PCB circuit
The road CVBS video signal input terminals of plate peripheral hardware 4 (13) or/and 1 road VGA signal input parts (14) and key-press input interface (9), it is described
(12) CVBS vision signals or/and VGA vision signals reach video decoding chip, the video solution through signal anti-interference process circuit
(7) the TTL/LVDS signal output parts of code chip connect liquid crystal display signal input interface；(2) DC/DC power management modules are whole
Driving plate provides main power source, (5) wherein LDO power supplys provide working power, the DC/DC power managements mould for video decoding chip
(4) and backlight drive (3) interface (2) block provides positive and negative pressure circuit for TFT liquid crystal displays simultaneously.
2. TFT liquid crystal display screen drive boards according to claim 1, it is characterised in that：(2) DC/DC power management modules use
LM2596 power supply chips, power input are in series with resettable fuse and antisurge suppressor TVS and ∏ type filter circuit
(1), power input is input to power supply chip by self- recoverage insurance and one-level antisurge suppressor TVS and ∏ type filter circuit, institute
The power output end for stating power supply chip is provided with one-level antisurge suppressor TVS again, is then input to the power supply of video decoding chip
End；The power supply chip uses MIC4576 or TD7590.
3. TFT liquid crystal display screen drive boards according to claim 1 or 2, it is characterised in that：Power input terminal uses
The anti-inverse plugging formula design that pitches of KF2EDGR3.81-3.81 band ears, VGA signaling interfaces use 15 core D-SUB interfaces of standard.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721007747.5U CN207068445U (en) | 2017-08-14 | 2017-08-14 | A kind of TFT liquid crystal display screen drive boards |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721007747.5U CN207068445U (en) | 2017-08-14 | 2017-08-14 | A kind of TFT liquid crystal display screen drive boards |
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| Publication Number | Publication Date |
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| CN207068445U true CN207068445U (en) | 2018-03-02 |
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| CN201721007747.5U Active CN207068445U (en) | 2017-08-14 | 2017-08-14 | A kind of TFT liquid crystal display screen drive boards |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111223453A (en) * | 2020-03-18 | 2020-06-02 | 京东方科技集团股份有限公司 | Power supply module and display device |
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2017
- 2017-08-14 CN CN201721007747.5U patent/CN207068445U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111223453A (en) * | 2020-03-18 | 2020-06-02 | 京东方科技集团股份有限公司 | Power supply module and display device |
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