CN201812478U - Display drive system of liquid crystal screen and flexible circuit board thereof - Google Patents
Display drive system of liquid crystal screen and flexible circuit board thereof Download PDFInfo
- Publication number
- CN201812478U CN201812478U CN2010205368695U CN201020536869U CN201812478U CN 201812478 U CN201812478 U CN 201812478U CN 2010205368695 U CN2010205368695 U CN 2010205368695U CN 201020536869 U CN201020536869 U CN 201020536869U CN 201812478 U CN201812478 U CN 201812478U
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Abstract
The utility model discloses a display drive system of a liquid crystal screen and a flexible circuit board thereof. The system comprises a host chip board, a flexible circuit board and a liquid crystal screen, wherein the input end of the flexible circuit board is connected with the host chip board by a miniLVDS (Low Voltage Differential Signaling) interface for data transmission; the output end of the flexible circuit board is connected to an integrated circuit inside the liquid crystal screen by two integrated FPC (Flexible Printed Circuit) wiring interfaces; and a gamma circuit is arranged in the flexible circuit board. In the display drive system of the liquid crystal screen, the flexible circuit board with the miniLVDS interface is used, so that the layout of the whole functional circuit is more reasonable, a circuit board on the back of the liquid crystal screen is omitted and the thicknesses of connecting ports and products can be reduced. In addition, the utility model can reduce the manufacturing cost more greatly and the electromagnetic interference on the products more effectively. The liquid crystal screen is further away from a heating power source on the back, which is beneficial to prolonging the service life.
Description
Technical field
The utility model relates to electronics and shows product scope, relates in particular to a kind of liquid crystal display display driver circuit.
Background technology
All need adopt an independent liquid crystal display back side circuit board to remove to connect liquid crystal display in the existing liquid crystal display display driver circuit.As shown in Figure 1, existing liquid crystal display display driving system comprises host chip plate 1, liquid crystal display back side circuit board 2, liquid crystal display 3.Described liquid crystal display back side circuit board 2 is the printed circuit board (PCB) of hard, is provided with power module, gal decoding circuit (Gamma circuit), backlight drive circuit, timing controller etc. above, and functional circuit module is many, complex structure.Described liquid crystal display back side circuit board 2 input ends are connected with host chip plate 1 by the LVDS interface, output terminal is connected with liquid crystal display by five winding displacement interfaces, carry out data transmission, and each winding displacement port all need be provided with a drive IC, wherein have 4 to be Source Driver IC, another is Gate Driver IC.Described liquid crystal display back side circuit board thickness is big, and it is more ultra-thin, more energy-conservation that whole demonstration product can not be accomplished.Existing described liquid crystal display back side circuit board is strict especially to technological requirement, causes this modular circuit price very expensive.
Existing LVDS interface has 30pin function terminal, be mainly 1 pin ground connection, 2,3 pins connect the 3.3V power supply, 4 pins are the EDID power supply, 5 pins are for adjusting backlight illumination, the input of 6 pin EDID clock signals, 7 pins are the input of EDID data, 8,9 pins are the data input pin of LVDS differential pair zero, 10 pin ground connection, 11,12 pins are the data input of LVDS differential pair 1,13 pin ground connection, 14,15 pins are LVDS differential pair 2 data input pins, 16 pin ground connection, 17,18 pins are LVDS differential pair input end of clock, 19 pin ground connection, 20,21 empty pins, 22,23 pin ground connection, 24,25,26 pins are the power supply of 5V backlight circuit, 27,28,29,30 is empty pin.Existing LVDS interface shortcoming is as follows: because the employing of LVDS interface is that digital differential is imported signal, be the Source Driver IC or the Gate Driver IC that can not directly drive liquid crystal display like this, carry the frequency of the speed of data and clock also restricted simultaneously, backboard light source can not directly drive by powering, so needing increases by a printed circuit board at the liquid crystal display back side, (has the T-CON digital processing chip on the printed circuit board (PCB), the gal decoding circuit, Source Driver IC powersupply system circuit, gal sign indicating number feed circuit, backlight drive circuit, VCOM circuit etc.).These circuit and printed circuit board (PCB) can increase quite high resources costs, simultaneously can not get effective shielding at the liquid crystal display back side, can bring a lot of electromagnetic interference (EMI) to complete machine like this, and printed board circuit the time can produce certain thermal value in work liquid crystal display is used certain influence of receiving a mandate, the height of device is impossible reduce on the printed circuit board (PCB) in addition, the thickness that will can not reduce or remit to the liquid crystal display increase makes liquid crystal display can not make thinlyyer like this.
The utility model content
The utility model purpose provides a kind of liquid crystal display display driving system and flexible PCB thereof, uses new type of drive, adopts the FPC of band miniLVDS interface to connect design, make whole data transfer rate faster, frequency is wideer, and power consumption is lower, and the function module circuit layout is more reasonable.
The utility model embodiment provides a kind of liquid crystal display display driving system, comprises the host chip plate, flexible PCB (FPC), the liquid crystal display that connect successively; The input end of wherein said flexible PCB is connected with described host chip plate by the miniLVDS interface, carries out data transmission, and the output terminal of described flexible PCB is connected to the integrated circuit of liquid crystal display inside by two FPC winding displacement interfaces.Also be provided with the gal decoding circuit in the described flexible PCB.
Further, described host chip plate is provided with and comprises power-supplying circuit, main control chip, timing controller, backlight drive circuit is used for the TTL conversion of signals is become the data processing chip A of LVDS signal, is used for the LVDS conversion of signals is become the data processing chip B of Mini LVDS signal; Described power-supplying circuit first output terminal connects main control chip, timing controller, data processing chip A, data processing chip B successively; Described data processing chip B output terminal connects the miniLVDS interface of described flexible PCB; Described power-supplying circuit second output terminal connects backlight drive circuit, and described backlight drive circuit output terminal connects LED-backlit transmitting illuminant assembly; Described power-supplying circuit the 3rd output terminal connects the miniLVDS interface of described flexible PCB.
Further, the feed circuit of the integrated circuit of described liquid crystal display inside is integrated gate circuit IC and source IC, and peripheral difference channel.
Further, the integrated circuit of described liquid crystal display inside also comprises 2 Source Driver IC and 2 Gate Driver IC.
The utility model embodiment also provides a kind of flexible PCB that is used for said system, the input end of described flexible PCB is connected with the host chip plate by the miniLVDS interface, carry out data transmission, the output terminal of described flexible PCB is connected to the integrated circuit of liquid crystal display inside by two FPC winding displacement interfaces, also is provided with the gal decoding circuit in the described flexible PCB.Described miniLVDS interface has 40pin function terminal, transmits 6 pairs of Mini LVDS data-signals and drives described liquid crystal display interior Source Driver IC and Gate Driver IC.
Adopt liquid crystal display display driving system of the present utility model that following advantage is arranged:
1, the new type of drive of utilization, saved traditional liquid crystal display back side circuit board, only adopt the flexible PCB of band miniLVDS interface, the functional circuit module of a part is integrated on the liquid crystal display chip, can be integrated on the liquid crystal display chip such as the feed circuit and the peripheral difference channel of gate circuit IC and source IC.Another part functional circuit module is transferred on the host chip plate of product, can transfer on the main frame central layer such as sequential control IC and backlight drive circuit etc.Whole like this demonstration product back plate thickness drops to 3.8 millimeters by 5.9 millimeters.And reduced the port and the chip for driving that connect, circuit layout is more reasonable, has saved manufacturing cost greatly.Be connected to the integrated circuit of liquid crystal display inside by two incorporate FPC winding displacement interfaces such as the output terminal of described flexible PCB, liquid crystal display only need adopt 2 Source Driver IC and 2 Gate DriverIC, and corresponding prior art has saved a drive IC exactly.
2, use simplification and standardized miniLVDS interface, allow liquid crystal display reach the data transmission and the wideer frequency bandwidth of more speed, data rate has improved more than the 300MHz, also more effectively reduces the requirement of electromagnetic interference (EMI) simultaneously.Substituted original common LVDS interface, interface is more oversimplified, and only needs 6 pairs of miniLVDS signals inputs, and is connected with the IC main power supply of liquid crystal display inside and can realizes the liquid crystal module driving.
Description of drawings
Fig. 1 is the circuit signal transmission synoptic diagram of liquid crystal display display drive apparatus of the prior art;
Fig. 2 is the liquid crystal display display driving system circuit connection diagram that the utility model embodiment provides.
Embodiment
For making the purpose of this utility model, technical scheme and advantage clearer, the utility model is described in further detail below in conjunction with accompanying drawing.
As shown in Figure 2, the utility model provides the utility model embodiment that a kind of liquid crystal display display driving system is provided, and comprises the host chip plate 11, flexible PCB (FPC) 22, the liquid crystal display 33 that connect successively; The input end of wherein said flexible PCB 22 is connected with described host chip plate by the miniLVDS interface, carries out data transmission, and the output terminal of described flexible PCB is connected to the integrated circuit of liquid crystal display inside by two incorporate FPC winding displacement interfaces.Also be provided with the gal decoding circuit in the described flexible PCB.
Described host chip plate is provided with and comprises power-supplying circuit, main control chip, timing controller, backlight drive circuit, be used for the TTL conversion of signals is become the data processing core A of LVDS signal, be used for the LVDS conversion of signals is become the data processing chip B of MiniLVDS signal; Described power-supplying circuit first output terminal connects main control chip, timing controller, data processing chip A, data processing chip B successively; The output terminal of described data processing chip B connects the miniLVDS interface of described flexible PCB; Described power-supplying circuit second output terminal connects backlight drive circuit, and described backlight drive circuit output terminal connects LED-backlit transmitting illuminant assembly; Described power-supplying circuit the 3rd output terminal connects the miniLVDS interface of described flexible PCB.
The feed circuit of the integrated circuit of described liquid crystal display inside is integrated gate circuit IC and source IC, and peripheral difference channel.The integrated circuit of described liquid crystal display inside also comprises 2 Source Driver IC and 2 Gate Driver IC.
Described flexible PCB adopts soft board substrate, and the liquid crystal display backboard PCB volume of making than existing printed circuit board (PCB) is littler thinner, also flexible.The input end of described flexible PCB is connected with the host chip plate by the miniLVDS interface, and described miniLVDS interface has 40 function terminals.The output terminal of described flexible PCB is by an interface 221 that 128 FPC cable terminals are arranged, and another has the interface 222 of 156 FPC cable terminals to be connected on the integrated circuit of liquid crystal display inside.Use and oversimplify and standardized miniLVDS interface, allow liquid crystal display reach the data transmission and the wideer frequency bandwidth of more speed, data rate has improved more than the 300MHz, also more effectively reduce simultaneously the requirement of electromagnetic interference (EMI), substituted original common LVDS interface interface and oversimplified, only needed 6 pairs of mini data-signals and be connected to realize the liquid crystal module driving with the IC main power supply of liquid crystal display inside.
The flexible PCB of described band miniLVDS interface is provided with the gal decoding circuit.The functional circuit module of a part is integrated on the liquid crystal display chip, can be integrated on the liquid crystal display chip such as the feed circuit and the peripheral difference channel of gate circuit IC and source IC.Another part functional circuit module is transferred on the host chip plate of product, can transfer on the main frame central layer such as sequential control IC, power module and backlight drive circuit etc.Allow whole demonstration product back plate thickness drop to 3.8 millimeters like this by 5.9 millimeters.The new liquid crystal display Driving technique of improving of the utility model allows liquid crystal display adopt 2 Source Driver IC and 2 Gate Driver IC just can realize original function exactly, and corresponding is exactly to have saved a drive IC, has saved manufacturing cost.
The liquid crystal display back side has no longer included described liquid crystal display back side circuit board in the liquid crystal display display driving system of the present utility model, with respect to the product among Fig. 1 following advantage is arranged: 1, can reduce cost by a larger margin, 2, the more effective electromagnetic interference (EMI) requirement that has reduced product, 3, liquid crystal display to the heating power supply at the back side from fartherly help serviceable life, 4, the IO interface of flexible PCB oversimplifies.
MiniLVDS interface in the described flexible PCB that the utility model provides has 40Pin function terminal, be specially 1,40 pins meet VCOM, 2 pins are EVEN, 3 pin ground connection, 4,5 pins are the power supply of 3.3V power supply, 6 pins are the VGL power supply, 7 pins are the VGH power supply, 8 pins are STV2,9 pins are STV1,10 pins are the clock input, 11 pins are reverse function end up and down, 12 pins are for enabling control end, 13 pins are peripheral difference selecting side, 14 pins are VCOM, 15 pins are the starting impulse end, 16 pin ground connection, 17 pins are left and right sides reverse function end, 18,19 pins are the 1st pair of data-signal input end of Mini LVDS, 20,21 pins are the 2nd pair of data-signal input end of Mini LVDS, 22,23 pins are the 3rd pair of data-signal input end of Mini LVDS, 24,25 pins are Mini LVDS input end of clock, 26,27 pins are the 4th pair of data-signal input end of Mini LVDS, 28,29 pins are the 5th pair of data-signal input end of Mini LVDS, 30,31 pins are the 6th pair of data-signal input end of Mini LVDS, 32,38 pins are the AVDD power supply, 33 pin ground connection, 34 pins are LD sequential control end, and 35 pins are REV array of display control end, and 36 pins transform for POL polarity, 37 pin ground connection, 39 pins are the DIO2 starting impulse.
The advantage that the flexible PCB of employing band Mini LVDS interface brings: at first be to adopt 6 couples of Source Driver IC and Gate Driver IC in the direct driving of the MiniLVDS data-signals transmission liquid crystal display 1,, data transfer rate is quite high, and this is the LVDS speed that is beyond one's reach to clock frequency up to 300MHz.2, the liquid crystal display back side does not need to increase the PCB circuit board, and advantage is to reduce resources costs, saves the space and allows the thickness of whole liquid crystal display reduce, and the interference that also can not produce the thermal source and the electromagnetism of too many circuit working has reduced the ambient operating temperature of liquid crystal display.3, directly adopt flexible PCB to be connected on the liquid crystal display, simplified interface and reduced the application difficulty.
The above is a preferred implementation of the present utility model; certainly can not limit the interest field of the utility model with this; should be understood that; for those skilled in the art; under the prerequisite that does not break away from the utility model principle; can also make some improvement and change, these improvement and change also are considered as protection domain of the present utility model.
Claims (7)
1. a liquid crystal display display driving system is characterized in that, comprises the host chip plate, flexible PCB, the liquid crystal display that connect successively; The input end of wherein said flexible PCB is connected with described host chip plate by the miniLVDS interface, and the output terminal of described flexible PCB is connected to the integrated circuit of liquid crystal display inside by two FPC winding displacement interfaces.
2. liquid crystal display display driving system according to claim 1 is characterized in that, also is provided with the gal decoding circuit in the described flexible PCB.
3. liquid crystal display display driving system according to claim 1, it is characterized in that, described host chip plate is provided with and comprises power-supplying circuit, main control chip, timing controller, backlight drive circuit is used for the TTL conversion of signals is become the data processing chip A of LVDS signal, is used for the LVDS conversion of signals is become the data processing chip B of Mini LVDS signal;
Described power-supplying circuit first output terminal connects main control chip, timing controller, data processing chip A, data processing chip B successively, and the output terminal of described data processing chip B connects the miniLVDS interface of described flexible PCB; Described power-supplying circuit second output terminal connects backlight drive circuit, and described backlight drive circuit output terminal connects LED-backlit transmitting illuminant assembly; Described power-supplying circuit the 3rd output terminal connects the miniLVDS interface of described flexible PCB.
4. liquid crystal display display driving system according to claim 1 is characterized in that, the feed circuit of the integrated circuit of described liquid crystal display inside is integrated gate circuit IC and source IC, and peripheral difference channel.
5. according to claim 1 or 4 described liquid crystal display display driving systems, it is characterized in that the integrated circuit of described liquid crystal display inside also comprises 2 Source Driver IC and 2 Gate Driver IC.
6. flexible PCB that is used for the liquid crystal display display driving system, it is characterized in that, the input end of described flexible PCB is connected with the host chip plate by the miniLVDS interface, carry out data transmission, the output terminal of described flexible PCB is connected to the integrated circuit of liquid crystal display inside by two FPC winding displacement interfaces, also is provided with the gal decoding circuit in the described flexible PCB.
7. flexible PCB according to claim 6 is characterized in that, described miniLVDS interface has 40Pin function terminal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205368695U CN201812478U (en) | 2010-09-17 | 2010-09-17 | Display drive system of liquid crystal screen and flexible circuit board thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205368695U CN201812478U (en) | 2010-09-17 | 2010-09-17 | Display drive system of liquid crystal screen and flexible circuit board thereof |
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| Publication Number | Publication Date |
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| CN201812478U true CN201812478U (en) | 2011-04-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205368695U Expired - Fee Related CN201812478U (en) | 2010-09-17 | 2010-09-17 | Display drive system of liquid crystal screen and flexible circuit board thereof |
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| CN (1) | CN201812478U (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101950547A (en) * | 2010-09-17 | 2011-01-19 | 清远市佳的美电子科技有限公司 | LCD panel display driving system and flexible circuit board thereof |
| CN102651193A (en) * | 2011-09-06 | 2012-08-29 | 京东方科技集团股份有限公司 | LED (Light Emitting Diode) display driver and display device |
| CN102956204A (en) * | 2012-11-30 | 2013-03-06 | 深圳市华星光电技术有限公司 | LED (Light-emitting Diode) backlight drive circuit, backlight module and liquid crystal display device |
| CN105761700A (en) * | 2016-05-20 | 2016-07-13 | 深圳市华星光电技术有限公司 | Power supply control system and display panel with same |
| CN107068099A (en) * | 2017-05-19 | 2017-08-18 | 深圳市华星光电技术有限公司 | Display panel and display device |
| CN107123406A (en) * | 2017-06-16 | 2017-09-01 | 惠科股份有限公司 | Display driver and display device |
| CN107240382A (en) * | 2017-07-31 | 2017-10-10 | 武汉华星光电技术有限公司 | A kind of display module and the circuit unit for display device |
| CN110767182A (en) * | 2019-11-07 | 2020-02-07 | 上海创功通讯技术有限公司 | Screen display control system and screen display control method |
| US10748468B2 (en) | 2017-05-19 | 2020-08-18 | Shenzhen China Star Optoelectronics Technology Co., Ltd. | Display panel and display device |
| CN112133259A (en) * | 2020-10-09 | 2020-12-25 | 上海中航光电子有限公司 | Display module, matching method of display module and main control chip signal format and display device |
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2010
- 2010-09-17 CN CN2010205368695U patent/CN201812478U/en not_active Expired - Fee Related
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101950547B (en) * | 2010-09-17 | 2012-10-03 | 清远市佳的美电子科技有限公司 | LCD panel display driving system and flexible circuit board thereof |
| CN101950547A (en) * | 2010-09-17 | 2011-01-19 | 清远市佳的美电子科技有限公司 | LCD panel display driving system and flexible circuit board thereof |
| CN102651193A (en) * | 2011-09-06 | 2012-08-29 | 京东方科技集团股份有限公司 | LED (Light Emitting Diode) display driver and display device |
| CN102651193B (en) * | 2011-09-06 | 2014-10-22 | 京东方科技集团股份有限公司 | LED (Light Emitting Diode) display driver and display device |
| CN102956204A (en) * | 2012-11-30 | 2013-03-06 | 深圳市华星光电技术有限公司 | LED (Light-emitting Diode) backlight drive circuit, backlight module and liquid crystal display device |
| CN102956204B (en) * | 2012-11-30 | 2015-11-25 | 深圳市华星光电技术有限公司 | A kind of LED backlight drive circuit, backlight module and liquid crystal indicator |
| CN105761700A (en) * | 2016-05-20 | 2016-07-13 | 深圳市华星光电技术有限公司 | Power supply control system and display panel with same |
| CN105761700B (en) * | 2016-05-20 | 2018-08-14 | 深圳市华星光电技术有限公司 | Power control system and display panel with the power control system |
| WO2018209755A1 (en) * | 2017-05-19 | 2018-11-22 | 深圳市华星光电技术有限公司 | Display panel, and display device |
| CN107068099A (en) * | 2017-05-19 | 2017-08-18 | 深圳市华星光电技术有限公司 | Display panel and display device |
| US10748468B2 (en) | 2017-05-19 | 2020-08-18 | Shenzhen China Star Optoelectronics Technology Co., Ltd. | Display panel and display device |
| CN107123406A (en) * | 2017-06-16 | 2017-09-01 | 惠科股份有限公司 | Display driver and display device |
| WO2018227784A1 (en) * | 2017-06-16 | 2018-12-20 | 惠科股份有限公司 | Display driver and display device |
| US10460677B2 (en) | 2017-07-31 | 2019-10-29 | Wuhan China Star Optoelectronics Technology Co., Ltd | Display components and circuit components of display devices |
| CN107240382A (en) * | 2017-07-31 | 2017-10-10 | 武汉华星光电技术有限公司 | A kind of display module and the circuit unit for display device |
| CN110767182A (en) * | 2019-11-07 | 2020-02-07 | 上海创功通讯技术有限公司 | Screen display control system and screen display control method |
| CN112133259A (en) * | 2020-10-09 | 2020-12-25 | 上海中航光电子有限公司 | Display module, matching method of display module and main control chip signal format and display device |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110427 Termination date: 20160917 |