CN1987972A - Video frequency driving system and its method for organic light emitting diode display screen - Google Patents
Video frequency driving system and its method for organic light emitting diode display screen Download PDFInfo
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- CN1987972A CN1987972A CNA2005101119292A CN200510111929A CN1987972A CN 1987972 A CN1987972 A CN 1987972A CN A2005101119292 A CNA2005101119292 A CN A2005101119292A CN 200510111929 A CN200510111929 A CN 200510111929A CN 1987972 A CN1987972 A CN 1987972A
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Abstract
This invention relates to a video drive system for the display screen of an organic LED including a single-chip processor control module, an outer data storage module, an organic LED display screen control module and a supply module characterizing in also including an image data decode module for converting difference image signals to R,G, B signals and field and line synchronous signals and image signals of the drive system input end pass through the DVI interface module to connect with said decode module, a FPGA process module for processing said signals of said RGB signals and the synchronous signals to the RGB image data signals, in which, image data are transmitted to the decoder for process when passing through the DVI data line and the compressed data are processed in the FPGA process module then to transmit the processed image data to the OLED control module for analog transformation and finally the analog signals are input into the OLED display screen to be displayed continuously.
Description
Technical field
The present invention relates to a kind of technical field of organic electroluminescence, relate in particular to a kind of online Driving technique of video Organic Light Emitting Diode OLED of organic EL display panel.
Background technology
Current flat-panel display device makes rapid progress, and still is in the development stage at home as newcomer's organic light-emitting diode (OLED) display screen of flat-panel display device, for the development of this display device dynamic image driving circuit, domesticly also is in the ground zero stage.
Dynamic display driver circuit of existing Organic Light Emitting Diode and method can be summarized as follows.The dynamic display driver circuit of Organic Light Emitting Diode comprises power module, single chip control module, external data storage module and organic light-emitting diode (OLED) display screen control module, and it is luminous that the organic light-emitting diode (OLED) display screen control module drives organic light-emitting diode (OLED) display screen.The dynamic display drive method of existing Organic Light Emitting Diode is: power module is by transformer and voltage transitions chip, convert the 220V alternating voltage of electric main the DC voltage of several different magnitudes of voltage to, respectively to single chip control module, external data storage module and the power supply of organic light-emitting diode (OLED) display screen control module; Single chip control module is the control module of driving circuit, and data and program leave among the inside ROM of single chip control module.The input interface of the view data of PC and driving circuit links together by the RS232 line; View data writes buffer memory among the RAM in the single-chip microcomputer earlier by the RS232 line, view data is write in the external data storage module again, single chip control module is read view data in the mode of per second 16 two field pictures with view data from the external data storage module, write the RAM buffer memory of single-chip microcomputer, again the view data of buffer memory is passed to the Organic Light Emitting Diode display control module, single chip control module is also sent and is read simultaneously, write control signal, the co-ordination of control Organic Light Emitting Diode display module, drive the mode continuous display image of organic light-emitting diode (OLED) display screen with per second 16 two field pictures, because persistence of vision, it is movable making the image of seeing.
The shortcoming of prior art is that the storer of depositing view data and program is a Single-chip Controlling Flash storer, be subject to this memory inside ROM memory limitations, the image data amount of depositing is very limited, usually can only deposit the view data of one section dynamic image, therefore, the dynamic image driving circuit of existing organic light-emitting diode (OLED) display screen and method only can accomplish to drive organic light-emitting diode (OLED) display screen and repeat to show one section dynamic image or character, can't support the dynamic demonstration of Online Video view data constantly.
Summary of the invention
At the defective that exists in the above-mentioned prior art, technical matters to be solved by this invention provides the video frequency driving system of the organic light-emitting diode (OLED) display screen of the online demonstration dynamic image of a kind of energy.
In order to solve the problems of the technologies described above, the video frequency driving system of a kind of organic light-emitting diode (OLED) display screen provided by the present invention comprises:
One single chip control module is used for the control and treatment of drive system;
One external data storage module connects described single chip control module, is used for the storage of drive system picture signal;
One organic light-emitting diode (OLED) display screen control module connects described single chip control module, is used for data image signal and converts analog picture signal to;
One power module is used for the power supply of system;
It is characterized in that, also comprise:
One image data decoding module, being used for the difference image signal of video card DVI output terminal output in the PC decoded makes it to convert to R, G, B signal and field synchronization, line synchronizing signal, and the picture signal of drive system input end connects described decoder module through the DVI interface module;
One core image (FPGA) processing module, connect described single chip control module, be used for described R, G, B signal and field synchronization, line synchronizing signal are processed into the rgb image data signal of 128 * 128 pixels, described decoder module is through being connected the FPGA processing module with the interface module of FPGA;
View data is transferred to demoder constantly through the DVI data line and handles, view data after the compression is handled in the FPGA processing module, again the image data transmission of handling well is simulated conversion in the OLED control module, at last simulating signal is imported the continuous display image of OLED display screen.
A kind of video OLED dynamic image driving method of organic EL display panel is characterized in that operation steps:
1) microprocessor and decoder module are carried out initialization;
2) the DVI output terminal output of image difference signal video card in the PC is sent in the decoder module through the DVI interface on DVI data line and the PCB; Decoder module becomes separately independently R, G, B signal and field synchronization, line synchronizing signal with the image difference signal decoding of sending into;
3) described separately independently R, G, B signal and field synchronization, line synchronizing signal by sending in the FPGA processor of core with the interface circuit of FPGA processor, under the control of program, be that to be converted to the needed resolution of display module be 128 * 128 RGB picture signal for the picture signal of 800 * 600 resolution with image source;
4) picture signal after will handling by with the interface circuit input OLED control module of OLED control module in; The OLED control module converts data-signal to simulating signal;
5) simulating signal is imported the continuous display image of OLED display screen; Because persistence of vision, it is movable to make the people who sees described display image think that the finding picture makes.
In step 5), described OLED display screen is with the continuous display image of mode of per second 40 two field pictures.
Utilize the video frequency driving system of organic light-emitting diode (OLED) display screen provided by the invention, compare with background technology, the present invention has following advantage:
1) driving circuit of the present invention and method can drive organic light emitting diode display and play online activity picture constantly,
Prior art can only drive organic light emitting diode display and show one section fixing dynamic image storing in the Flash storer.The shortcoming of prior art is exactly that view data and program all leave in the Flash, and the dynamic image of storage is subject to the amount of capacity of Flash, and can only severe play, and can't carry out dynamic transmission constantly.Driving circuit of the present invention and method are by the DVI data line view data to be transferred among decoder module and the FPGA constantly to handle, simultaneously the image data transmission of handling well is simulated conversion in the Organic Light Emitting Diode control module, arrive final organic light-emitting diode (OLED) display screen and demonstrate dynamic menu.Therefore can drive organic light emitting diode display online playing moving frame constantly, than going a step further before one section dynamic menu of repeat playing merely.
2) Presentation Function is powerful, supports multiple output,
The present invention also is provided with the VGA analog video interface except that the DVI digital visual interface.So just can compatible multiple video card, support the various video output format.Only need just can reach the conversion that under the situation that does not change hardware circuit, realizes the various video signal by the program that changes FPGA.Simultaneously, if expansion TV signal receiving interface just can be realized the reception and the conversion of TV signal easily.In other words, this system has possessed the basic function of a complete display and a televisor in fact, is equivalent to a miniscope or televisor.And volume is little, in light weight, powerful, is widely used.
3) simple in structure, adopt universal elements, with low cost, easy to implement,
Driving circuit structure of the present invention is simple, and used components and parts all are general part common in the city, and are with low cost, easy to implement.The prospect that has volume production fully.
4) can fully represent the characteristics of organic light emitting diode display,
The function that the organic light emitting diode display driving circuit can be play dynamic image is constantly given in the online driving of screen, and the characteristics of organic light-emitting diode (OLED) display screen wide viewing angle, high contrast, high brightness, rapid reaction, nothing hangover, high luminous efficiency can be represented fully.Therefore, driving circuit of the present invention is particularly suitable for being used for the performance of comprehensive test organic light emitting diode display, makes the back road inspection process of organic light emitting diodde desplay device be able to better realization.
Description of drawings
Fig. 1 is the fundamental diagram of driving circuit of the present invention;
Fig. 2 is the circuit diagram of the demoder power module of driving circuit in the embodiment of the invention;
Fig. 3 is the circuit diagram of the FPGA power module of driving circuit in the embodiment of the invention;
Fig. 4 is the decoder module of driving circuit in the embodiment of the invention and the circuit block diagram of FPGA processing module;
Fig. 5 is the circuit diagram of the Organic Light Emitting Diode control module of driving circuit in the embodiment of the invention;
Fig. 6 is the FB(flow block) of drive circuit works in the embodiment of the invention.
Embodiment
Below in conjunction with description of drawings embodiments of the invention are described in further detail, but present embodiment is not limited to the present invention, every employing analog structure of the present invention and similar variation thereof all should be listed protection scope of the present invention in.
Referring to shown in Figure 1, the video frequency driving system of a kind of organic light-emitting diode (OLED) display screen that the embodiment of the invention provided, connect the FPGA processing module by accepting image data unit through demoder, the FPGA processing module connects ROM and OLED display screen control module respectively, computer display card is through the DVI data line, accepting image data unit is transferred to demoder constantly with view data and handles, view data after the compression is handled in the FPGA processing module, again the image data transmission of handling well is simulated conversion in the OLED control module, at last simulating signal is imported the continuous display image of OLED display screen.
Referring to Fig. 2, shown in Figure 3, the power conversion chip GND pin ground connection in demoder power module (1) and the FPGA power module (2) ,+5V input ,+3.3V output links to each other with electric capacity between input end and output terminal and GND.
Referring to shown in Figure 4, a kind of dynamic image driving circuit of forming by demoder and FPGA processing module of video OLED drive system of organic EL display panel, the input end of OLED drive system connects decoder module AD9xx2 through DVI interface module COMECTORE, decoder module AD9xx2 is through being connected a FPGA processing module XC2xxx with the interface module HEADER40 of FPGA, the one FPGA processing module XC2xxx connects an OLED control module interface HEADER40 and the 2nd OLED control module interface HEADER40 respectively, the 2nd FPGA processing module XC2xxx connects the 2nd OLED control module interface HEADER40 and single chip control module C8051xxxx respectively, and OLED display screen control module (not shown) connects single chip control module C8051xxxx and OLED display screen (not shown) respectively;
Decoder module links to each other with the DVI interface module with resistance by lead, wherein pin GND (1 ~ 21) and the direct ground connection of pin A in the decoder module; Pin R_TERM passes through resistance eutral grounding; Pin REFBYPASS and MIDBYPASS are by the direct ground connection of electric capacity; Pin VD_＜10 ~ 0 〉, VDD_0, VDD_1, PVD_＜3 ~ 0, VDD_2, VDD_3, VDD_4, directly link to each other with VDD3.3V; Pin SDA, SCL link to each other with VDD3.3V by resistance; FILT pin one end is by electric capacity, and the other end links to each other with 3.3V with electric capacity by resistance; Pin RX0-, RX0+, RX1-, RX1+, RX2-, RX2+, RXC-and RXC+ pin link to each other with DATA0-, DATA0+, DATA1-, DATA1+, DATA2-, DATA2+, CLK-and CLK+ pin in the DVI interface module respectively by resistance;
Decoder module links to each other with a FPGA processor module by the interface module of lead-in wire through the FPGA processor; The 2nd FPGA processor module part pin links to each other with single chip control module, other pins as: TDI, PROG, INIT/P107 then download mouth with program and link to each other.Pin P70 ~ P71, P74 ~ P75 in the one FPGA processor module, P8 ~ P83, P86 ~ P88 link to each other with P ~ P21 (be designated as down odd number) pin in the OLED control module respectively; Pin P89 ~ P90, P91 in the one FPGA processor module, P96, P97, P99, P101, P102, P110 link to each other with pin P23 ~ P39 (being designated as odd number down) in the OLED control module interface respectively; Pin P112 ~ P113, P120 ~ P123 in the one FPGA processor module, P127, P133 ~ P134, P138 ~ P141, P48 ~ P149, P15 ~ P153, P65, P166 link to each other with pin P2 ~ P40 (being designated as even number down) in the OLED control module interface respectively; Pin P168, P172 ~ P175 in the one FPGA processor module, P179 ~ P181, P187 ~ P188, P191 ~ P195, P199 ~ P202, P204 ~ P205 link to each other with pin P1 ~ P39 (being designated as odd number down) in the 2nd OLED control module interface respectively; Optional 20 I/O mouths in the 2nd FPGA processor module link to each other with pin P2 ~ P40 (being designated as even number down) in the 2nd OLED control module interface;
In OLED display screen control module, pin VDD, VDDIO, BS1 and BS2 directly meet power supply 3.3V; Pin VCC0, VCC1 meet power supply 12V; Pin VCOMH passes through capacity earth; Pin IREF passes through resistance eutral grounding; The direct ground connection of pin VSS0, VSS1.
A kind of dynamic image driving method of organic EL display panel is characterized in that operation steps:
1) microprocessor and decoder module are carried out initialization;
2) the DVI output terminal output of image difference signal video card in the PC is sent in the decoder module through the DVI interface on DVI data line and the PCB; Decoder module becomes separately independently R, G, B signal and field synchronization, line synchronizing signal with the image difference signal decoding of sending into;
3) described separately independently R, G, B signal and field synchronization, line synchronizing signal by sending in the FPGA processor of core with the interface circuit of FPGA processor, under the control of program, be that to be converted to the needed resolution of display module be 128 * 128 RGB picture signal for the picture signal of 800 * 600 resolution with image source;
4) picture signal after will handling by with the interface circuit input OLED control module of OLED control module in; The OLED control module converts data-signal to simulating signal;
5) simulating signal is imported the mode continuous display image of OLED display screen with per second 40 two field pictures, because persistence of vision, it is movable to make the people who sees described display image think that the finding picture makes.
Claims (3)
1, a kind of video frequency driving system of organic light-emitting diode (OLED) display screen comprises:
One single chip control module is used for the control and treatment of drive system;
One external data storage module connects described single chip control module, is used for the storage of drive system picture signal;
One organic light-emitting diode (OLED) display screen control module connects described single chip control module, is used for data image signal and converts analog picture signal to;
One power module is used for the power supply of system;
It is characterized in that, also comprise:
One image data decoding module, being used for the difference image signal of video card DVI output terminal output in the PC decoded makes it to convert to R, G, B signal and field synchronization, line synchronizing signal, and the drive system input end connects described decoder module through the DVI interface module;
One core image (FPGA) processing module, connect described single chip control module, be used for described R, G, B signal and field synchronization, line synchronizing signal are processed into the rgb image data signal of 128 * 128 pixels, described decoder module is through being connected the FPGA processing module with the interface module of FPGA;
View data transfers to demoder constantly through the DVI data line and handles, view data after the compression is handled in the FPGA processing module, again the image data transmission of handling well is simulated conversion in the OLED control module, at last simulating signal is imported the continuous display image of OLED display screen.
2, a kind of dynamic image driving method that uses the described video frequency driving system of claim 1 is characterized in that the method operation steps:
1) microprocessor and decoder module are carried out initialization;
2) the DVI output terminal output of image difference signal video card in the PC is sent in the decoder module through the DVI interface on DVI data line and the PCB; Decoder module becomes separately independently R, G, B signal and field synchronization, line synchronizing signal with the image difference signal decoding of sending into;
3) described separately independently R, G, B signal and field synchronization, line synchronizing signal by sending in the FPGA processor of core with the interface circuit of FPGA processor, under the control of program, be that to be converted to the needed resolution of display module be 128 * 128 RGB picture signal for the picture signal of 800 * 600 resolution with image source;
4) picture signal after will handling by with the interface circuit input OLED control module of OLED control module in; The OLED control module converts data-signal to simulating signal;
5) simulating signal is imported the continuous display image of OLED display screen; Because persistence of vision, it is movable to make the people who sees described display image think that the finding picture makes.
3, dynamic image driving method according to claim 2 is characterized in that, in described step 5), described OLED display screen is with the continuous display image of mode of per second 40 two field pictures.
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