CN101950547A - LCD panel display driving system and flexible circuit board thereof - Google Patents
LCD panel display driving system and flexible circuit board thereof Download PDFInfo
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- CN101950547A CN101950547A CN 201010287909 CN201010287909A CN101950547A CN 101950547 A CN101950547 A CN 101950547A CN 201010287909 CN201010287909 CN 201010287909 CN 201010287909 A CN201010287909 A CN 201010287909A CN 101950547 A CN101950547 A CN 101950547A
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Abstract
The invention discloses an LCD panel display driving system and a flexible printed circuit (FPC) thereof. The system comprises a host chip board, the FPC and an LCD panel which are connected in turn, wherein the input end of the FPC is connected with the host chip board through a mini low voltage differential signaling (LVDS) interface to perform data transmission; the output end of the FPC is connected with an integrated circuit in the LCD panel through two integrated FPC flat cable interfaces; and the inside of the FPC is provided with a gamma circuit. The LCD panel display driving system of the invention adopts the FPC with the miniLVDS interface so that the layout of the entire functional circuit is more reasonable, the circuit board on the back of the LCD panel can be eliminated and the connection ports and the product thickness can be reduced. Therefore, the manufacturing cost can be reduced more greatly, the electromagnetic interference on the product can be reduced more effectively; and the LCD panel is far from the back power supply emitting heat so as to have longer service life.
Description
Technical field
The present invention relates to electronics and show product scope, relate 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.
Summary of the invention
The object of the invention 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 embodiment of the invention 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 embodiment of the invention 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.
Adopt liquid crystal display display driving system of the present invention 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 mini data-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 embodiment of the invention provides.
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, the present invention is described in further detail below in conjunction with accompanying drawing.
As shown in Figure 2, the invention provides the embodiment of the invention a kind of liquid crystal display display driving system is provided, comprise 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 present invention 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 invention, 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 provided by the invention 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 invention; certainly can not limit the present invention's interest field with this; should be understood that; for those skilled in the art; under the prerequisite that does not break away from the principle of the invention; can also make some improvement and change, these improvement and change also are considered as protection scope of the present invention.
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. liquid crystal display display driving system according to claim 1 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, it is characterized in that, described miniLVDS interface 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, and 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 MiniLVDS, 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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010287909A CN101950547B (en) | 2010-09-17 | 2010-09-17 | LCD panel display driving system and flexible circuit board thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010287909A CN101950547B (en) | 2010-09-17 | 2010-09-17 | LCD panel display driving system and flexible circuit board thereof |
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| CN101950547A true CN101950547A (en) | 2011-01-19 |
| CN101950547B CN101950547B (en) | 2012-10-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201010287909A Expired - Fee Related CN101950547B (en) | 2010-09-17 | 2010-09-17 | LCD panel display driving system and flexible circuit board thereof |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102592563A (en) * | 2012-03-26 | 2012-07-18 | 广州视声电子科技有限公司 | Display screen |
| CN103971626A (en) * | 2013-01-24 | 2014-08-06 | 三星显示有限公司 | Display appatatus and method of driving the same |
| CN104867461A (en) * | 2014-02-25 | 2015-08-26 | 江苏奥斯汀光电科技有限公司 | Integrated liquid crystal display |
| CN105185324A (en) * | 2015-07-24 | 2015-12-23 | 深圳市华星光电技术有限公司 | Liquid crystal display panel and device |
| CN110749839A (en) * | 2019-11-21 | 2020-02-04 | 延锋伟世通电子科技（上海）有限公司 | Insertion deviation prevention detection circuit and method for multiple wide FPCs (flexible printed circuits) in vehicle-mounted display system |
| 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 |
| CN112399122A (en) * | 2020-11-11 | 2021-02-23 | 南京熊猫电子股份有限公司 | Method for realizing UHD display by FHD |
| CN116312393A (en) * | 2022-12-22 | 2023-06-23 | 深圳市大我云读写科技有限公司 | Method, device, equipment and storage medium for driving color ink screen |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102592563A (en) * | 2012-03-26 | 2012-07-18 | 广州视声电子科技有限公司 | Display screen |
| CN103971626A (en) * | 2013-01-24 | 2014-08-06 | 三星显示有限公司 | Display appatatus and method of driving the same |
| CN103971626B (en) * | 2013-01-24 | 2018-05-01 | 三星显示有限公司 | Display device and the method for driving the display device |
| CN104867461A (en) * | 2014-02-25 | 2015-08-26 | 江苏奥斯汀光电科技有限公司 | Integrated liquid crystal display |
| CN105185324A (en) * | 2015-07-24 | 2015-12-23 | 深圳市华星光电技术有限公司 | Liquid crystal display panel and device |
| WO2017015982A1 (en) * | 2015-07-24 | 2017-02-02 | 深圳市华星光电技术有限公司 | Liquid crystal display panel and 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 |
| CN110749839A (en) * | 2019-11-21 | 2020-02-04 | 延锋伟世通电子科技（上海）有限公司 | Insertion deviation prevention detection circuit and method for multiple wide FPCs (flexible printed circuits) in vehicle-mounted display system |
| CN112399122A (en) * | 2020-11-11 | 2021-02-23 | 南京熊猫电子股份有限公司 | Method for realizing UHD display by FHD |
| CN116312393A (en) * | 2022-12-22 | 2023-06-23 | 深圳市大我云读写科技有限公司 | Method, device, equipment and storage medium for driving color ink screen |
| CN116312393B (en) * | 2022-12-22 | 2023-09-08 | 深圳市大我云读写科技有限公司 | Method, device, equipment and storage medium for driving color ink screen |
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|---|---|
| CN101950547B (en) | 2012-10-03 |
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Effective date of registration: 20180124 Address after: B 511542 workshop in Guangdong province Qingyuan city Yinzhan forest Youtu Road No. 1 Qingyuan Gadmei Electronic Technology Co. Ltd. Patentee after: GUANGDONG GADMEI INTELLIGENT TECHNOLOGY Co.,Ltd. Address before: 511542 Guangdong province Qingyuan City silver lamp forest Patentee before: GADMEI ELECTRONICS TECHNOLOGY Co.,Ltd. |
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Granted publication date: 20121003 |