CN203773915U - Silicon-based liquid crystal display screen driving chip - Google Patents
Silicon-based liquid crystal display screen driving chip Download PDFInfo
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- CN203773915U CN203773915U CN201320535028.6U CN201320535028U CN203773915U CN 203773915 U CN203773915 U CN 203773915U CN 201320535028 U CN201320535028 U CN 201320535028U CN 203773915 U CN203773915 U CN 203773915U
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Abstract
The utility model discloses a silicon-based liquid crystal display screen driving chip. A serial video data signal interface pin and a parallel video data signal interface pin are defined respectively. A video signal conversion circuit can be used to receive a serial video data signal and a parallel video data signal. Accordingly, the connection between the digital signals is improved and all the digital video signals of different formats can be used to drive a silicon-based liquid crystal display screen. Therefore, the driving chip is convenient.
Description
Technical field
The utility model relates to silicon-based liquid crystal display screen Driving technique field, particularly relates to a kind of silicon-based liquid crystal display screen and drives chip.
Background technology
Liquid crystal on silicon (Liquid Crystal on Silicon, LCOS) is a kind of based on reflective-mode, the matrix liquid crystal display device that size is very little.
For the feature of LCOS screen, when LCOS screen is driven, need to use the vision signal of parallel rgb format to drive, and traditional digital video signal is the vision signal of MCU8080 pattern, is 8 digital video signals of serial.
In the time that LCOS screen is driven, select different drive units to drive for the vision signal of the different-format of inputting.Video signal for different-format drives by different drive units, and the docking between digital signal is improved not and need to select drive unit in the time of the digital video signal of input different-format, cumbersome.
Utility model content
Based on this, be necessary perfect not for digital signal docking, need to select different driving device to cause cumbersome problem for the vision signal of different-format, provide a kind of can improve digital signal docking silicon-based liquid crystal display screen drive chip.
A kind of silicon-based liquid crystal display screen drives chip, for driving silicon-based liquid crystal display screen, comprising:
Vision signal change-over circuit, described vision signal change-over circuit directly receives parallel video digital signal or receives serial video digital signal and described serial video signal is converted to corresponding parallel video digital signal;
Governor circuit, described governor circuit is electrically connected described vision signal change-over circuit, described governor circuit reads the described parallel video digital signal of described vision signal change-over circuit output, and drives described silicon-based liquid crystal display screen according to described parallel video digital signal;
Printed circuit board, is printed with described vision signal change-over circuit and described governor circuit, and has the serial video digital signal interface pin and the parallel video digital signal interface pin that are connected with described vision signal change-over circuit;
Described vision signal change-over circuit receives described serial video digital signal by described serial video digital signal interface pin, receives parallel video digital signal by described parallel video digital signal interface pin.
In an embodiment, described vision signal change-over circuit comprises vision signal conversion circuit unit and the SSD196 family chip circuit unit of electrical connection therein;
The parallel video digital signal that described vision signal conversion circuit unit receives by the serial video digital signal receiving by described serial video digital signal interface pin or by described parallel video digital signal interface pin is converted to the serial video digital signal matching with the interface of described SSD196 family chip circuit unit, and described SSD196 family chip circuit unit is converted to the described serial video digital signal matching corresponding parallel video digital signal and flows to described governor circuit.
In an embodiment, described serial video digital signal interface pin comprises aberration dutycycle functional pin: PWMR pin, PWMG pin and PWMB pin therein.
In an embodiment, described parallel video digital signal interface pin comprises therein: the digital signal interface pin that R, G, B are each six; Described R, G, the six position digital signal interface pin orders that B is corresponding are arranged, the adjacent arrangement of digital signal interface pin of described R, G, B.
Therein in an embodiment, described printed circuit board also comprise the reception row signal being connected with described vision signal conversion circuit unit respectively row signal pins, received field signal field signal pin and receive the digital signal bus pin of total digital signal.
Therein in an embodiment, in the time that described governor circuit reads described parallel video digital signal, described governor circuit promotes the speed of the described parallel video digital signal that reads described vision signal change-over circuit output, thereby drives described silicon-based liquid crystal display screen.
In an embodiment, described main control circuit is CPLD chip circuit therein.
In an embodiment, described printed circuit board is provided with connector stand therein, and described main control circuit is electrically connected described silicon-based liquid crystal display screen by described connector stand.
In an embodiment, described printed circuit board is long is 35.15mm～35.45mm therein, and wide is 18.65mm～18.95mm.
Above-mentioned silicon-based liquid crystal display screen drives chip, define respectively serial video digital signal interface pin and parallel video digital signal interface pin, can receive respectively serial video digital signal and parallel video digital signal by vision signal change-over circuit, docking between perfect digital signal, and the digital video signal that uses this silicon-based liquid crystal display screen to drive chip can realize different-format all can drive silicon-based liquid crystal display screen, more convenient.
Brief description of the drawings
Fig. 1 is that the silicon-based liquid crystal display screen of an embodiment drives chip schematic diagram;
Fig. 2 is that the silicon-based liquid crystal display screen of another embodiment drives chip schematic diagram.
Embodiment
A kind of silicon-based liquid crystal display screen drives chip, be provided with serial video digital signal interface pin and parallel video digital signal interface pin, and can receive respectively serial video digital signal and parallel video digital signal by vision signal change-over circuit, docking between perfect digital signal, and the digital video signal that uses this silicon-based liquid crystal display screen to drive chip can realize different-format all can drive silicon-based liquid crystal display screen, more convenient; Read the speed of parallel video digital signal by promoting governor circuit, solved the low problem little with frame per second of frequency while driving silicon-based liquid crystal display screen to drive; And by integrated program storage chip, make silicon-based liquid crystal display screen drive the integrated level of chip higher, volume is less.
Drive chip to be described in more detail below in conjunction with drawings and Examples to a kind of silicon-based liquid crystal display screen of the utility model.
Fig. 1 is that the silicon-based liquid crystal display screen of an embodiment drives chip schematic diagram.
With reference to figure 1, a kind of silicon-based liquid crystal display screen drives chip, vision signal change-over circuit 130 and the governor circuit 150 of on printed circuit board 110, printing electrical connection, printed circuit board 110 also has serial video digital signal interface pin 170 and parallel video digital signal interface pin 190.
Vision signal change-over circuit 130 can be received serial video digital signal and serial video digital signal is converted to corresponding parallel video digital signal by serial video digital signal interface pin 170, vision signal change-over circuit 130 also can directly receive parallel video digital signal by parallel video digital signal interface pin 190, governor circuit 150 reads the parallel video digital signal that vision signal change-over circuit 130 is exported, and drives silicon-based liquid crystal display screen by above-mentioned parallel video digital signal.
By serial video digital signal interface pin 170 and parallel video digital signal interface pin 190, vision signal change-over circuit 130 can receive respectively serial video digital signal and parallel video digital signal, docking between perfect digital signal, and the digital video signal of realizing different-format all can drive silicon-based liquid crystal display screen 200, more convenient.
Liquid crystal on silicon (Liquid Crystal on Silicon, LCOS), is also liquid crystal on silicon, is a kind of based on reflective-mode, matrix liquid crystal display device that size is very little, and this matrix adopts CMOS technology processing and fabricating on silicon to form.Adopting its light of projector of LCOS technology is not through LCD panel, but adopts reflection mode to form image, and light utilization ratio can reach 40%.LCOS is a kind of novel reflection type projection technology, with penetrating LCD (Liquid Crystal Display, and digital light processing (Digital Light Procession LCD), DLP) compare, LCOS has the features such as the optical efficiency of utilization is high, volume is little, aperture opening ratio is high, manufacturing technology is more ripe, and it can realize high resolving power and sufficient color representation easily.
The Liquified gas tanker showing according to silicon-based liquid crystal display screen 200, in the time that silicon-based liquid crystal display screen 200 is driven, need to input parallel R, G, B video signal, drive so first need that the video signal of serial is converted to parallel video signal in the time of input serial video signal.
Fig. 2 is that the silicon-based liquid crystal display screen of another embodiment drives chip schematic diagram.
With reference to figure 2, above-mentioned vision signal change-over circuit 130 comprises vision signal conversion circuit unit 132 and the SSD196 family chip circuit unit 134 of electrical connection.The parallel video digital signal that vision signal conversion circuit unit 132 receives by the serial video digital signal receiving by serial video digital signal interface pin 170 or by parallel video digital signal interface pin 190 is converted to the serial video digital signal matching with the interface of SSD196 family chip circuit unit 134, and the serial video digital signal matching that SSD196 family chip circuit unit 134 is exported above-mentioned vision signal conversion circuit unit 132 is converted to corresponding parallel video digital signal and flows to governor circuit 150.In other embodiment, also can use other circuit that dissimilar vision signal is converted to corresponding parallel video digital signal.Concrete, 8080 interface modes that the interface modes of above-mentioned SSD196 family chip circuit is serial.
Concrete, above-mentioned vision signal conversion circuit unit 132 can be CPLD chip.Above-mentioned CPLD chip completes the conversion of external series video signal, thereby reads the driving speed of the speed lifting LCOS display screen of the parallel video digital signal of SSD196 family chip output by raising.In addition, at above-mentioned CPLD chip, parallel video digital signal is sent to before SSD196 family chip, above-mentioned SSD196 family chip is carried out initialization by CPLD chip.LCOS display screen is divided into CF-LCOS display screen and CS-LCOS display screen, wherein, CF-LCOS display screen is more than 90HZ in frequency, between 90-120HZ time, guarantee display screen does not glimmer, CS-LCOS display screen is more than 270HZ in frequency, and between 270-360HZ time, guarantee display screen does not glimmer.By CPLD, SSD196 family chip is carried out to initialization, complete the requirement of said frequencies, realize SSD196 family chip and can not glimmer in use.
Concrete, above-mentioned SSD196 family chip circuit unit 134 can be SSD1960 chip (not shown) or SSD1961 chip (not shown).While using SSD1960 chip to drive, realize the QVGA resolution that silicon-based liquid crystal display screen 200 resolution are 320*240 and show; While using SSD1961 chip to drive, realize the VGA resolution that silicon-based liquid crystal display screen 200 resolution are 640*480 and show, realized high resolving power demonstration, more meeting the market requirement.
With reference to figure 2, above-mentioned serial video digital signal interface pin 170 comprises aberration dutycycle functional pin: PWMR pin, PWMG pin and PWMB pin.Concrete, above-mentioned serial video digital signal interface pin 170 comprises: the digital signal interface pin that R, G, B are each six, R, G, the six position digital signal interface pin orders that B is corresponding are arranged, the adjacent arrangement of digital signal interface pin of R, G, B.With reference to figure 2, the digital signal interface pin that above-mentioned R, G, B are each six specifically comprises: tactic pin RD0-RD5, GD0-GD5, BD0-BD5.
Shown in Fig. 2, above-mentioned printed circuit board 110 also comprises row signal pins HS, the field signal pin VS, the digital signal bus pin DE that are connected with vision signal conversion circuit unit 132.Above line signal pins HS is used for receiving row signal, and field signal pin VS is used for accepting field signal, and data signal bus pin DE is used for receiving total digital signal.With reference to figure 2, above-mentioned printed circuit board 110 also comprise clock pin PLCK, wire pin GND and power pins.
Above-mentioned pin can be arranged according to a definite sequence, taking embodiment illustrated in fig. 2 as example, silicon-based liquid crystal display screen drives chip pin to be arranged as from the first pin to the 28 pin order: PWMR pin, PWMG pin and PWMB pin, GND pin, BD0-BD5 pin, GD0-GD5 pin, RD0-RD5 pin, HS pin, VS pin, DE pin, PLCK pin, GND pin and power pins.In other embodiments, also other pin order of definable.Concrete, the clock of above-mentioned clock pin output is 113.4MHZ, field signal pin VS exports 270HZ, power pins access 5v.
Concrete, above-mentioned main control circuit 150 can be CPLD chip, and CPLD chip is electrically connected above-mentioned SSD196 chip, and by connector stand 140(with reference to figure 2) driving silicon-based liquid crystal display screen 200 shows.
In other embodiment, above-mentioned vision signal conversion circuit unit 132 can be integrated in same CPLD chip with above-mentioned main control circuit 150, realizes silicon-based liquid crystal display screen and drives that chip design is more simple, integrated level volume higher, chip is less, cost is lower.
CPLD chip reads the parallel video digital signal of SSD196 family chip output, complete the combination of R, G, B pixel and twin wire universal serial bus (the Inter-Integrated Circuit of silicon-based liquid crystal display screen 200, I2C) configuration, produces the driving sequential that drives silicon-based liquid crystal display screen 200.
SSD196 chip can be realized the data of buffer memory one frame video image (640*480*18bit), and external series video signal or parallel video digital signal are according to the data of writing sequential and write toward SSD196 chip a frame video image of SSD196 chip.CPLD is by the image of reading sequential and read from SSD1961 a frame of SSD1961.The speed that the speed that writes (comprising serial video digital signal or parallel video digital signal) SSD196 chip due to outer video signal is read SSD196 chip output data than CPLD is slow, therefore, promote the speed that CPLD reads SSD196 chip output data, can realize the lifting of frame frequency, solve the low problem little with driving frame per second of driving frequency while driving silicon-based liquid crystal display screen 200.
With reference to figure 2, above-mentioned silicon-based liquid crystal display screen drives chip to be also provided with program storage chip 120, and said procedure storage chip 120 is electrically connected above-mentioned CPLD chip, the program needing for storing driver process.In the process of above-mentioned driving silicon-based liquid crystal display screen 200, above-mentioned CPLD completes the driving to silicon-based liquid crystal display screen 200 by the program that reads said procedure storage chip 120 and store.Program storage chip 120 is integrated in to above-mentioned silicon-based liquid crystal display screen and drives on chip, make silicon-based liquid crystal display screen drive the integrated level of chip higher, the construction cycle of chip is shorter, and volume is less.
With reference to figure 2, above-mentioned silicon-based liquid crystal display screen drives on chip and is also provided with connector stand 140, above-mentioned CPLD chip connects silicon-based liquid crystal display screen 200 by above-mentioned connector stand 140, and the driving sequential of above-mentioned driving silicon-based liquid crystal display screen 200 is exported to silicon-based liquid crystal display screen 200.
Concrete, the length of above-mentioned printed circuit board 110 is 35.15mm～35.45mm, and the wide of above-mentioned printed circuit board 110 is 18.65mm～18.95mm, and thickness is 1.20mm, and it is 2.70mm that above-mentioned silicon-based liquid crystal display screen drives chip thickness.Ensureing that, on the basis that chip integration is high, the size of chip is upgraded little, cost of manufacture is lower.
The above embodiment has only expressed several embodiment of the present utility model, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to the utility model the scope of the claims.It should be pointed out that for the person of ordinary skill of the art, without departing from the concept of the premise utility, can also make some distortion and improvement, these all belong to protection domain of the present utility model.Therefore, the protection domain of the utility model patent should be as the criterion with claims.
Claims (9)
1. silicon-based liquid crystal display screen drives a chip, it is characterized in that, comprising:
Vision signal change-over circuit, described vision signal change-over circuit directly receives parallel video digital signal or receives serial video digital signal and described serial video signal is converted to corresponding parallel video digital signal;
Governor circuit, described governor circuit is electrically connected described vision signal change-over circuit, described governor circuit reads the described parallel video digital signal of described vision signal change-over circuit output, and drives described silicon-based liquid crystal display screen according to described parallel video digital signal;
Printed circuit board, is printed with described vision signal change-over circuit and described governor circuit, and has the serial video digital signal interface pin and the parallel video digital signal interface pin that are connected with described vision signal change-over circuit;
Described vision signal change-over circuit receives described serial video digital signal by described serial video digital signal interface pin, receives parallel video digital signal by described parallel video digital signal interface pin.
2. silicon-based liquid crystal display screen according to claim 1 drives chip, it is characterized in that, described vision signal change-over circuit comprises vision signal conversion circuit unit and the SSD196 family chip circuit unit of electrical connection;
The parallel video digital signal that described vision signal conversion circuit unit receives by the serial video digital signal receiving by described serial video digital signal interface pin or by described parallel video digital signal interface pin is converted to the serial video digital signal matching with the interface of described SSD196 family chip circuit unit, and described SSD196 family chip circuit unit is converted to the described serial video digital signal matching corresponding parallel video digital signal and flows to described governor circuit.
3. silicon-based liquid crystal display screen according to claim 1 drives chip, it is characterized in that, described serial video digital signal interface pin comprises aberration dutycycle functional pin: PWMR pin, PWMG pin and PWMB pin.
4. silicon-based liquid crystal display screen according to claim 1 drives chip, it is characterized in that, described parallel video digital signal interface pin comprises: the digital signal interface pin that R, G, B are each six; Described R, G, the six position digital signal interface pin orders that B is corresponding are arranged, the adjacent arrangement of digital signal interface pin of described R, G, B.
5. silicon-based liquid crystal display screen according to claim 2 drives chip, it is characterized in that, described printed circuit board also comprise the reception row signal being connected with described vision signal conversion circuit unit respectively row signal pins, received field signal field signal pin and receive the digital signal bus pin of total digital signal.
6. silicon-based liquid crystal display screen according to claim 1 drives chip, it is characterized in that, in the time that described governor circuit reads described parallel video digital signal, described governor circuit promotes the speed of the described parallel video digital signal that reads described vision signal change-over circuit output, thereby drives described silicon-based liquid crystal display screen.
7. silicon-based liquid crystal display screen according to claim 1 drives chip, it is characterized in that, described main control circuit is CPLD chip circuit.
8. silicon-based liquid crystal display screen according to claim 1 drives chip, it is characterized in that, described printed circuit board is provided with connector stand, and described main control circuit is electrically connected described silicon-based liquid crystal display screen by described connector stand.
9. silicon-based liquid crystal display screen according to claim 1 drives chip, it is characterized in that, described printed circuit board is long is 35.15mm～35.45mm, and wide is 18.65mm～18.95mm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201320535028.6U CN203773915U (en) | 2013-08-29 | 2013-08-29 | Silicon-based liquid crystal display screen driving chip |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201320535028.6U CN203773915U (en) | 2013-08-29 | 2013-08-29 | Silicon-based liquid crystal display screen driving chip |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106205481A (en) * | 2016-07-06 | 2016-12-07 | 昀光微电子（上海）有限公司 | A kind of microdisplay on silicon |
| CN111640406A (en) * | 2020-07-16 | 2020-09-08 | 歌尔光学科技有限公司 | Display driving system and method and display device |
| CN112053663A (en) * | 2020-09-11 | 2020-12-08 | 上海钜成锐讯科技有限公司 | LCoS display board card and display device |
-
2013
- 2013-08-29 CN CN201320535028.6U patent/CN203773915U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106205481A (en) * | 2016-07-06 | 2016-12-07 | 昀光微电子（上海）有限公司 | A kind of microdisplay on silicon |
| CN106205481B (en) * | 2016-07-06 | 2019-01-11 | 昀光微电子（上海）有限公司 | A kind of microdisplay on silicon |
| CN111640406A (en) * | 2020-07-16 | 2020-09-08 | 歌尔光学科技有限公司 | Display driving system and method and display device |
| CN112053663A (en) * | 2020-09-11 | 2020-12-08 | 上海钜成锐讯科技有限公司 | LCoS display board card and display device |
| CN112053663B (en) * | 2020-09-11 | 2022-07-12 | 上海钜成锐讯科技有限公司 | LCoS display board card and display device |
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